@charset "UTF-8";

:root {
  --blue: #0096fa;
  --blue-deep: #0668ab;
  --blue-pale: #eaf6ff;
  --white: #ffffff;
  --ink: #10202e;
  --muted: #5f7688;
  --line: #dbe8f2;
  --shell: 1180px;
  --header-height: 66px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 16px); }
body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
}
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(--blue); outline-offset: 3px; }
.page-shell { width: min(calc(100% - 44px), var(--shell)); margin: 0 auto; }
.eyebrow {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 10px;
  color: var(--blue);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 3px;
}
.eyebrow::before { width: 14px; height: 2px; content: ""; background: currentColor; }

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, .95);
  backdrop-filter: blur(12px);
}
.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(calc(100% - 44px), var(--shell));
  min-height: var(--header-height);
  margin: 0 auto;
  gap: 18px;
}
.brand { display: inline-flex; align-items: center; flex: none; gap: 9px; font-size: 21px; font-weight: 900; letter-spacing: -.2px; color: var(--blue-deep); }
.brand img { width: 34px; height: 34px; border-radius: 8px; object-fit: contain; }
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; align-items: center; gap: clamp(10px, 1.8vw, 24px); padding: 0; margin: 0; list-style: none; }
.primary-nav a { display: block; padding: 6px 0; color: var(--muted); font-size: 13px; font-weight: 700; }
.primary-nav a:hover { color: var(--blue); }
.nav-actions { display: flex; align-items: center; flex: none; gap: 9px; }
.nav-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  gap: 7px;
  padding: 0 18px;
  border-radius: 999px;
  background: var(--blue);
  color: #fff;
  font-size: 12.5px;
  font-weight: 900;
  white-space: nowrap;
  transition: background .18s ease;
}
.nav-download:hover { background: var(--blue-deep); }
.nav-download svg, .button svg { width: 17px; height: 17px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.menu-toggle { display: none; width: 40px; height: 40px; padding: 0; border: 1px solid var(--line); border-radius: 50%; background: transparent; cursor: pointer; }
.menu-toggle span { display: block; width: 17px; 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: big title + follow pill + unequal waterfall */
.hero {
  position: relative;
  overflow: hidden;
  padding: 40px 0 54px;
  background:
    radial-gradient(760px 460px at 88% -14%, rgba(0, 150, 250, .16), transparent 70%),
    linear-gradient(180deg, var(--blue-pale) 0%, #ffffff 76%);
  border-bottom: 1px solid var(--line);
}
.hero-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; }
.hero-copy { min-width: 0; }
.hero-kicker { margin: 0 0 6px; color: var(--blue); font-size: 10.5px; font-weight: 800; letter-spacing: 3px; }
.hero h1 {
  margin: 0;
  color: var(--blue);
  font-size: clamp(64px, 9vw, 112px);
  font-weight: 900;
  letter-spacing: clamp(-2px, -.35vw, -4px);
  line-height: .92;
}
.hero-subtitle { margin: 12px 0 0; color: var(--ink); font-size: clamp(17px, 2vw, 23px); font-weight: 900; letter-spacing: .5px; }
.hero-lead { max-width: 520px; margin: 10px 0 0; color: var(--muted); font-size: 13.5px; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; margin-top: 20px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  gap: 12px;
  padding: 0 28px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 900;
  transition: transform .18s ease, background .18s ease;
}
.button-primary { background: var(--blue); color: #fff; box-shadow: 0 12px 24px rgba(0, 150, 250, .26); }
.button-primary:hover { background: var(--blue-deep); transform: translateY(-2px); }
.button-large { min-height: 52px; padding: 0 34px; font-size: 15px; }
.text-link { color: var(--blue-deep); border-bottom: 1px dashed #9ecdf0; font-size: 13px; font-weight: 800; }
.text-link span { margin-left: 4px; color: var(--blue); }

.hero-follow { flex: none; display: flex; flex-direction: column; align-items: flex-end; gap: 14px; padding-top: 8px; }
.follow-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 22px;
  border: 1px solid var(--blue);
  border-radius: 999px;
  background: #fff;
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
  box-shadow: 0 8px 18px rgba(0, 150, 250, .14);
}
.follow-pill i { font-style: normal; font-size: 15px; line-height: 1; }
.hero-stats { display: flex; gap: 22px; margin: 0; }
.hero-stats div { text-align: right; }
.hero-stats dt { color: var(--muted); font-size: 10px; letter-spacing: 1.4px; }
.hero-stats dd { margin: 0; color: var(--blue-deep); font-size: 19px; font-weight: 900; line-height: 1.2; }

.waterfall {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 30px;
  align-items: start;
}
.wf { margin: 0; overflow: hidden; border-radius: 4px; background: var(--blue-pale); box-shadow: 0 10px 24px rgba(6, 104, 171, .12); }
.wf img { width: 100%; height: auto; object-fit: cover; object-position: center 22%; }
.wf-1 { margin-top: 34px; }
.wf-1 img { aspect-ratio: 3 / 4.1; }
.wf-2 { margin-top: 0; }
.wf-2 img { aspect-ratio: 3 / 3.4; }
.wf-3 { margin-top: 56px; }
.wf-3 img { aspect-ratio: 3 / 4.4; }
.wf-4 { margin-top: 14px; }
.wf-4 img { aspect-ratio: 3 / 3.1; }

/* features */
.features { padding: 62px 0 66px; border-bottom: 1px solid var(--line); }
.section-heading { margin-bottom: 26px; }
.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: 620px; margin: 9px 0 0; color: var(--muted); font-size: 13.5px; }
.section-heading-split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(200px, 280px); align-items: end; gap: 22px; }
.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 { padding: 20px 18px 22px; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
.feature-card:nth-child(2n) { background: #f8fcff; }
.feature-no { display: block; margin-bottom: 9px; color: var(--blue); font-size: 11px; font-weight: 800; letter-spacing: 2px; }
.feature-card h3 { margin: 0 0 6px; font-size: 16.5px; font-weight: 900; }
.feature-card p { margin: 0; color: var(--muted); font-size: 12.5px; line-height: 1.8; }

/* shots: samples */
.shots { padding: 60px 0 66px; background: #f6fbff; border-bottom: 1px solid var(--line); }
.sample-row { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.sample-card { margin: 0; background: #fff; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.sample-card img { width: 100%; height: auto; aspect-ratio: 3 / 4.6; object-fit: cover; object-position: center 18%; }
.sample-card:nth-child(2) img { object-position: center 12%; }
.sample-card:nth-child(4) img { object-position: center 24%; }
.sample-card figcaption { display: flex; align-items: baseline; gap: 8px; padding: 10px 12px 12px; border-top: 1px solid var(--line); }
.sample-card figcaption b { color: var(--blue); font-size: 10px; font-weight: 800; }
.sample-card figcaption span { display: flex; flex-direction: column; font-size: 13px; font-weight: 800; line-height: 1.42; }
.sample-card figcaption small { color: var(--muted); font-size: 10.5px; font-weight: 500; }

/* faq */
.faq { padding: 60px 0 64px; }
.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: 16px 0 16px 14px;
  border-left: 3px solid transparent;
  cursor: pointer;
  list-style: none;
}
.faq-list details[open] summary { border-left-color: var(--blue); }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary h3 { margin: 0; font-size: 15px; font-weight: 800; }
.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(--blue);
  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 20px 16px 17px; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.85; }

/* reviews */
.reviews { padding: 60px 0 66px; border-top: 1px solid var(--line); background: var(--blue-pale); }
.review-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; padding: 0; margin: 0; list-style: none; }
.review-card { padding: 17px 18px 18px; border-radius: 6px; background: #fff; border: 1px solid #d5e9f8; }
.review-meta { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 5px; margin-bottom: 7px; }
.review-meta b { color: var(--blue-deep); font-size: 13px; font-weight: 900; }
.review-meta time { color: #8fa6b6; font-size: 10px; letter-spacing: .3px; }
.review-card p { margin: 0; color: #3e5464; font-size: 13px; line-height: 1.78; }

/* steps */
.steps { padding: 60px 0 66px; }
.step-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; padding: 0; margin: 0; list-style: none; border-top: 2px solid var(--blue); }
.step-list li { position: relative; padding: 22px 18px 0 0; }
.step-list li + li { padding-left: 18px; border-left: 1px solid var(--line); }
.step-list span {
  position: absolute;
  top: -15px;
  left: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  font-size: 11px;
  font-weight: 900;
}
.step-list li + li span { left: 18px; }
.step-list h3 { margin: 14px 0 6px; font-size: 16px; font-weight: 900; }
.step-list p { margin: 0; color: var(--muted); font-size: 12.5px; line-height: 1.8; }

/* download */
.download { padding: 26px 0 46px; background: #fff; }
.download-inner {
  padding: 40px clamp(22px, 4vw, 46px) 34px;
  border-radius: 10px;
  background:
    radial-gradient(420px 220px at 92% 4%, rgba(255, 255, 255, .22), transparent 70%),
    linear-gradient(120deg, #0096fa, #3fb6ff 84%);
  color: #fff;
  text-align: center;
}
.download .eyebrow { justify-content: center; color: #e6f5ff; }
.download .eyebrow::before { background: #e6f5ff; }
.download h2 { color: #fff; }
.download-inner > p:last-of-type { margin: 9px auto 20px; color: #eaf7ff; font-size: 13px; }
.download .button-primary { background: #06283f; color: #eaf7ff; box-shadow: none; }
.download .button-primary:hover { background: #0b3a58; }
.download-notes { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 22px; padding: 18px 0 0; margin: 22px 0 0; border-top: 1px solid rgba(255, 255, 255, .28); list-style: none; }
.download-notes li { color: #eaf7ff; font-size: 11px; }

/* footer */
.site-footer { padding: 36px 0 44px; border-top: 1px solid var(--line); background: #f8fbfd; }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 16px 40px; align-items: start; }
.footer-brand strong { color: var(--blue-deep); font-size: 18px; font-weight: 900; }
.footer-brand p { margin: 3px 0 0; color: var(--muted); font-size: 12px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 7px 20px; }
.footer-nav a { color: var(--blue-deep); font-size: 12px; }
.footer-nav a:hover { color: var(--blue); }
.footer-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 7px 18px; margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--line); color: var(--muted); font-size: 11.5px; }
.footer-meta p { margin: 0; }
.footer-meta a { color: var(--muted); }
.disclaimer { grid-column: 1 / -1; margin: 0; color: #8798a5; font-size: 11px; line-height: 1.8; }

@media (max-width: 1024px) {
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sample-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sample-card img { aspect-ratio: 3 / 3.8; }
}
@media (max-width: 900px) {
  .menu-toggle { display: block; }
  .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    padding: 8px 22px 14px;
    border-bottom: 1px solid var(--line);
    background: #fff;
    box-shadow: 0 14px 24px rgba(10, 45, 70, .12);
  }
  .primary-nav.is-open { display: block; }
  .primary-nav ul { flex-direction: column; align-items: stretch; gap: 0; }
  .primary-nav a { padding: 11px 0; border-bottom: 1px solid var(--line); }
  .hero-top { flex-direction: column; }
  .hero-follow { flex-direction: row; align-items: center; justify-content: space-between; width: 100%; padding-top: 4px; }
  .hero-stats { gap: 18px; }
  .hero-stats div { text-align: left; }
  .waterfall { gap: 8px; }
  .wf-1, .wf-3 { margin-top: 0; }
  .wf-2, .wf-4 { margin-top: 18px; }
  .wf-1 img, .wf-3 img { aspect-ratio: 3 / 4.2; }
  .wf-2 img, .wf-4 img { aspect-ratio: 3 / 3.6; }
  .step-list { grid-template-columns: 1fr; border-top: 1px solid var(--line); }
  .step-list li { padding: 22px 0 16px 44px; border-bottom: 1px solid var(--line); }
  .step-list li + li { padding-left: 44px; border-left: 0; }
  .step-list li + li span { left: 0; }
  .step-list span { top: 18px; }
}
@media (max-width: 600px) {
  .page-shell, .nav-shell { width: calc(100% - 30px); }
  .hero { padding: 28px 0 40px; }
  .hero h1 { font-size: 62px; }
  .waterfall { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
  .wf-2, .wf-4 { margin-top: 20px; }
  .feature-grid { grid-template-columns: 1fr; }
  .sample-row { grid-template-columns: 1fr; }
  .sample-card img { aspect-ratio: 3 / 3.4; }
  .review-list { grid-template-columns: 1fr; }
  .section-heading-split { grid-template-columns: 1fr; gap: 8px; }
  .section-heading-split > p:last-child { margin: 0; }
  .download .button { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 380px) {
  .brand { font-size: 17px; gap: 7px; }
  .brand img { width: 28px; height: 28px; }
  .nav-actions { gap: 7px; }
  .nav-download { min-height: 34px; padding: 0 10px; font-size: 11px; gap: 4px; }
  .nav-download svg { width: 13px; height: 13px; }
  .menu-toggle { width: 34px; height: 34px; }
  .hero h1 { font-size: 52px; }
  .hero-subtitle { font-size: 16px; }
  .follow-pill { padding: 8px 16px; font-size: 12px; }
  .hero-stats dd { font-size: 16px; }
  .step-list li, .step-list li + li { padding-left: 38px; }
}