@charset "UTF-8";

:root {
  --bg: #06090f;
  --bg-2: #0a0e18;
  --panel: #0c111d;
  --line: #1c2740;
  --ink: #eef2f8;
  --muted: #8f9cb4;
  --blue: #2f6bff;
  --blue-lit: #6f9bff;
  --cyan: #49d8ff;
  --shell: 1180px;
  --header-height: 70px;
}

* { 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 14px;
  color: var(--cyan);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 3px;
  line-height: 1.4;
}
.eyebrow::before { width: 22px; height: 2px; content: ""; background: linear-gradient(90deg, var(--blue), var(--cyan)); }

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid var(--line);
  background: rgba(6, 9, 15, .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-size: 21px; font-weight: 900; letter-spacing: -.4px; }
.brand img { width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 8px; object-fit: contain; background: #0b1020; }
.brand-tag {
  padding: 2px 5px;
  border: 1px solid rgba(47, 107, 255, .6);
  border-radius: 3px;
  color: var(--blue-lit);
  font-size: 8.5px;
  font-style: normal;
  font-weight: 900;
  letter-spacing: 1px;
}
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; align-items: center; gap: clamp(12px, 1.8vw, 24px); padding: 0; margin: 0; list-style: none; }
.primary-nav a { display: block; padding: 7px 0; border-bottom: 2px solid transparent; color: #9fadc4; font-size: 13px; font-weight: 700; }
.primary-nav a:hover { border-bottom-color: var(--blue); 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 rgba(47, 107, 255, .8);
  border-radius: 5px;
  background: linear-gradient(135deg, var(--blue), #1f47c8);
  color: #f2f6ff;
  font-size: 13px;
  font-weight: 900;
  white-space: nowrap;
  box-shadow: 0 10px 26px rgba(47, 107, 255, .3);
  transition: filter .18s ease;
}
.nav-download:hover { filter: brightness(1.15); }
.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: 5px; 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 with diagonal hatch + wind band */
.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(680px 420px at 76% 12%, rgba(47, 107, 255, .28), transparent 68%),
    linear-gradient(180deg, #080d18, var(--bg) 88%);
}
.hero::before {
  position: absolute;
  inset: 0;
  content: "";
  background-image: repeating-linear-gradient(115deg, rgba(111, 155, 255, .085) 0 1px, transparent 1px 11px);
  mask-image: linear-gradient(180deg, #000, transparent 86%);
  pointer-events: none;
}
.hero::after {
  position: absolute;
  top: 0;
  right: 0;
  width: 42%;
  height: 100%;
  content: "";
  background: radial-gradient(closest-side, rgba(73, 216, 255, .16), transparent);
  pointer-events: none;
}
.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
  align-items: center;
  gap: clamp(20px, 3vw, 46px);
  padding: 62px 0 66px;
}
.hero-copy { min-width: 0; }
.hero-kicker {
  display: inline-block;
  padding: 4px 10px;
  margin: 0 0 20px;
  border: 1px solid rgba(73, 216, 255, .35);
  border-radius: 3px;
  color: var(--cyan);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 2px;
}
.hero h1 {
  margin: 0;
  font-size: clamp(44px, 5.4vw, 78px);
  font-weight: 900;
  letter-spacing: -1.5px;
  line-height: 1.02;
}
.hero-subtitle {
  margin: 18px 0 0;
  color: var(--blue-lit);
  font-size: clamp(17px, 1.8vw, 22px);
  font-weight: 800;
  line-height: 1.45;
}
.hero-lead { max-width: 520px; margin: 14px 0 0; color: var(--muted); font-size: 14.5px; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 20px; margin-top: 28px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  gap: 14px;
  padding: 0 28px;
  border: 1px solid transparent;
  border-radius: 5px;
  font-size: 14px;
  font-weight: 900;
  transition: transform .18s ease, filter .18s ease;
}
.button-primary { background: linear-gradient(135deg, var(--blue), #1c3fc0); color: #f4f8ff; box-shadow: 0 16px 34px rgba(47, 107, 255, .3); }
.button-primary:hover { filter: brightness(1.16); transform: translateY(-2px); }
.button-large { min-height: 54px; padding: 0 34px; font-size: 15px; }
.text-link { color: #c6d3e6; border-bottom: 1px dashed #2c3f60; font-size: 13px; font-weight: 800; }
.text-link span { display: inline-block; margin-left: 5px; color: var(--cyan); }
.hero-tags { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 26px 0 0; list-style: none; }
.hero-tags li { padding: 4px 10px; border: 1px solid var(--line); border-radius: 3px; color: #93a3bd; font-size: 11px; }

.band {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(6px, 1vw, 12px);
  padding: 26px 10px;
}
.band-card {
  position: relative;
  width: 31%;
  margin: 0;
  padding: 6px 6px 0;
  border: 1px solid #243354;
  border-radius: 4px;
  background: #0a0f1a;
  box-shadow: 0 22px 44px rgba(0, 0, 0, .5);
}
.band-card img { width: 100%; height: auto; aspect-ratio: 5 / 7; object-fit: cover; object-position: center 18%; border-radius: 2px; }
.band-card figcaption {
  padding: 7px 2px 9px;
  color: #8b9ab4;
  font-size: 10px;
  letter-spacing: .5px;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.band-a { transform: rotate(-5deg) translateY(14px); }
.band-b { z-index: 2; width: 34%; transform: translateY(-14px); border-color: rgba(47, 107, 255, .75); }
.band-c { transform: rotate(5deg) translateY(16px); }

/* features: staggered 2x2 */
.features { padding: 76px 0 86px; border-bottom: 1px solid var(--line); background: var(--bg-2); }
.section-heading { margin-bottom: 34px; }
.section-heading h2, .download h2 { margin: 0; font-size: clamp(25px, 2.8vw, 35px); font-weight: 900; letter-spacing: -.8px; line-height: 1.3; }
.section-heading > p:last-child { max-width: 620px; margin: 12px 0 0; color: var(--muted); font-size: 14px; }
.feature-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px 16px; }
.feature-card {
  position: relative;
  padding: 22px 22px 20px 70px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: linear-gradient(160deg, rgba(47, 107, 255, .1), transparent 52%), var(--panel);
}
.feature-grid .feature-card:nth-child(even) { transform: translateY(24px); }
.feature-no {
  position: absolute;
  top: 22px;
  left: 22px;
  color: var(--blue-lit);
  font-size: 19px;
  font-weight: 900;
  letter-spacing: -.5px;
  opacity: .8;
}
.feature-card h3 { margin: 0 0 6px; font-size: 17px; font-weight: 900; }
.feature-card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.85; }

/* shots: big visual + style notes */
.shots { padding: 82px 0 88px; }
.shots-grid { display: grid; grid-template-columns: minmax(0, 380px) minmax(0, 1fr); align-items: center; gap: clamp(24px, 4vw, 56px); }
.main-visual {
  margin: 0;
  padding: 10px 10px 0;
  border: 1px solid #243354;
  border-radius: 6px;
  background: #0a0f1a;
  box-shadow: 0 26px 50px rgba(0, 0, 0, .55);
}
.main-visual img { width: 100%; height: auto; aspect-ratio: 4 / 5; object-fit: cover; object-position: center 14%; border-radius: 3px; }
.main-visual figcaption { display: flex; align-items: baseline; gap: 10px; padding: 11px 4px 13px; }
.main-visual figcaption b { color: var(--cyan); font-size: 10px; letter-spacing: 1px; }
.main-visual figcaption span { font-size: 13px; font-weight: 800; }
.main-visual figcaption small { display: block; color: var(--muted); font-size: 10.5px; font-weight: 500; }
.note-list { padding: 0; margin: 26px 0 0; list-style: none; border-top: 1px solid var(--line); }
.note-list li { padding: 16px 0; border-bottom: 1px solid var(--line); }
.note-list b { display: block; margin-bottom: 4px; color: #fff; font-size: 15px; font-weight: 900; }
.note-list span { color: var(--muted); font-size: 13px; line-height: 1.8; }

/* faq: two columns, rule lines */
.faq { padding: 74px 0 82px; border-top: 1px solid var(--line); background: var(--bg-2); }
.faq-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 34px; }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary h3 { flex: 1 1 auto; min-width: 0; margin: 0; font-size: 15px; font-weight: 900; line-height: 1.5; }
.faq-list summary i { position: relative; flex: none; width: 16px; height: 16px; }
.faq-list summary i::before,
.faq-list summary i::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 11px;
  height: 1.5px;
  content: "";
  background: var(--blue-lit);
  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 26px 18px 0; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.9; }

/* reviews: two columns with avatar */
.reviews { padding: 76px 0 84px; }
.review-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; padding: 0; margin: 0; list-style: none; }
.review-card {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 20px;
  border: 1px solid var(--line);
  border-left: 2px solid rgba(47, 107, 255, .7);
  border-radius: 4px;
  background: var(--panel);
}
.review-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(47, 107, 255, .55), rgba(73, 216, 255, .28));
  color: #eaf1ff;
  font-size: 13px;
  font-weight: 900;
}
.review-body { min-width: 0; }
.review-meta { display: flex; align-items: baseline; flex-wrap: wrap; gap: 4px 10px; margin-bottom: 5px; }
.review-meta b { color: var(--blue-lit); font-size: 13px; font-weight: 900; }
.review-meta time { color: #6f7f99; font-size: 10px; }
.review-card p { margin: 0; color: #b6c5da; font-size: 13px; line-height: 1.8; }

/* steps: three tabbed cards */
.steps { padding: 72px 0 80px; border-top: 1px solid var(--line); background: var(--bg-2); }
.step-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; padding: 0; margin: 0; list-style: none; }
.step-list li {
  position: relative;
  padding: 34px 22px 22px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background:
    repeating-linear-gradient(135deg, rgba(47, 107, 255, .07) 0 1px, transparent 1px 8px),
    var(--panel);
}
.step-list span {
  position: absolute;
  top: -1px;
  left: 22px;
  padding: 3px 10px;
  border-radius: 0 0 4px 4px;
  background: var(--blue);
  color: #fff;
  font-size: 9.5px;
  font-weight: 900;
  letter-spacing: 1.4px;
}
.step-list h3 { margin: 0 0 6px; font-size: 16.5px; font-weight: 900; }
.step-list p { margin: 0; color: var(--muted); font-size: 12.8px; line-height: 1.8; }

/* download: ticket with hatch */
.download { padding: 26px 0; }
.download-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 20px 36px;
  padding: 44px clamp(24px, 4vw, 54px);
  border: 1px solid rgba(47, 107, 255, .45);
  border-radius: 8px;
  background:
    repeating-linear-gradient(115deg, rgba(111, 155, 255, .07) 0 1px, transparent 1px 10px),
    radial-gradient(420px 240px at 88% 8%, rgba(47, 107, 255, .34), transparent 70%),
    #080e1a;
}
.download-copy > p:last-child { margin: 12px 0 0; color: #9fb0c9; font-size: 13.5px; }
.download-side { flex: none; }
.download-notes { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 8px 22px; padding: 18px 0 0; margin: 0; border-top: 1px solid rgba(47, 107, 255, .18); list-style: none; }
.download-notes li { color: #8b9cb6; font-size: 11.5px; }
.download-notes li::before { margin-right: 7px; color: var(--cyan); content: "/"; }

/* 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: #a4b3ca; font-size: 12px; }
.footer-nav a:hover { color: var(--blue-lit); }
.footer-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px; margin-top: 22px; padding-top: 18px; 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: #73819a; font-size: 11.5px; line-height: 1.8; }

/* responsive */
@media (max-width: 1000px) {
  .hero-grid { grid-template-columns: 1fr; padding: 48px 0 54px; }
  .band { max-width: 520px; margin: 10px auto 0; }
  .shots-grid { grid-template-columns: minmax(0, 300px) minmax(0, 1fr); }
}
@media (max-width: 960px) {
  .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); }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-grid .feature-card:nth-child(even) { transform: none; }
  .shots-grid { grid-template-columns: 1fr; gap: 30px; }
  .main-visual { max-width: 340px; }
  .faq-list { grid-template-columns: 1fr; }
  .review-list { grid-template-columns: 1fr; }
  .step-list { grid-template-columns: 1fr; }
  .download-inner { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .page-shell, .nav-shell { width: calc(100% - 32px); }
  .hero h1 { font-size: clamp(38px, 12vw, 52px); letter-spacing: -.5px; }
  .hero-lead { font-size: 14px; }
  .hero-actions { gap: 16px; }
  .band { gap: 6px; padding: 18px 4px; }
  .band-card figcaption { font-size: 9px; padding: 5px 0 7px; }
  .feature-card { padding: 20px 18px 18px 58px; }
  .feature-no { left: 18px; top: 20px; font-size: 17px; }
  .main-visual { max-width: none; }
  .main-visual img { aspect-ratio: 3 / 4; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 430px) {
  .nav-shell { gap: 8px; }
  .brand { font-size: 16px; gap: 7px; }
  .brand img { width: 30px; height: 30px; }
  .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: 38px; }
  .button { width: 100%; }
  .band-card figcaption { font-size: 8px; }
  .review-card { padding: 16px 14px; gap: 10px; }
  .download-notes { gap: 6px 14px; }
}