@charset "UTF-8";

:root {
  --bg: #F4FAFF;
  --bg-2: #E9F4FE;
  --panel: #FFFFFF;
  --line: #D5E8F7;
  --ink: #0F172A;
  --muted: #4B5F75;
  --sky: #38BDF8;
  --sky-deep: #0284C7;
  --pink: #FB7185;
  --navy: #0F172A;
  --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;
  overflow-wrap: anywhere;
}
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(--pink); 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(--sky-deep);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2.4px;
  line-height: 1.4;
}
.eyebrow::before { width: 16px; height: 2px; content: ""; background: currentColor; }

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid var(--line);
  background: rgba(244, 250, 255, .95);
  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: -.2px; }
.brand img { width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 12px; object-fit: contain; background: #fff; }
.brand-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 19px;
  height: 19px;
  border-radius: 50%;
  background: var(--pink);
  color: #fff;
  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, 25px); padding: 0; margin: 0; list-style: none; }
.primary-nav a { display: block; padding: 7px 0; border-bottom: 2px solid transparent; color: #4B5F75; font-size: 13px; font-weight: 700; }
.primary-nav a:hover { border-bottom-color: var(--sky); color: var(--ink); }
.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(--navy);
  border-radius: 10px;
  background: var(--navy);
  color: #fff;
  font-size: 13px;
  font-weight: 900;
  white-space: nowrap;
  transition: background .18s ease, color .18s ease;
}
.nav-download:hover { background: var(--sky); border-color: var(--sky); color: #06202E; }
.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: #fff; 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 */
.hero {
  position: relative;
  overflow: hidden;
  color: #EAF6FF;
  background:
    radial-gradient(520px 340px at 50% 34%, rgba(56, 189, 248, .22), transparent 72%),
    radial-gradient(360px 260px at 88% 92%, rgba(251, 113, 133, .16), transparent 72%),
    linear-gradient(180deg, #101B31 0%, var(--navy) 62%, #0B1222 100%);
}
.hero::before {
  position: absolute;
  inset: 0;
  content: "";
  background-image: radial-gradient(rgba(56, 189, 248, .18) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: linear-gradient(180deg, #000, transparent 78%);
  pointer-events: none;
}
.hero-stage {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 54px 0 46px;
}
.hero-copy { max-width: 760px; text-align: center; }
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  color: #9FD8F7;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 1.6px;
}
.hero-kicker b {
  padding: 3px 8px;
  border: 1px solid rgba(56, 189, 248, .5);
  border-radius: 5px;
  color: var(--sky);
  font-size: 9.5px;
  font-weight: 900;
  letter-spacing: 1.6px;
}
.hero h1 {
  margin: 0;
  color: #fff;
  font-size: clamp(58px, 9vw, 112px);
  font-weight: 900;
  letter-spacing: clamp(-3px, -.6vw, -6px);
  line-height: .94;
  text-shadow: 0 18px 46px rgba(56, 189, 248, .3);
}
.hero-subtitle {
  margin: 14px 0 0;
  color: var(--sky);
  font-size: clamp(18px, 2.2vw, 24px);
  font-weight: 800;
  line-height: 1.4;
}
.hero-lead { max-width: 560px; margin: 12px auto 0; color: #A9C6DD; font-size: 14px; }

/* voice stage */
.voice-stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  grid-template-areas: "left core right" "hold hold hold";
  align-items: center;
  gap: 8px clamp(8px, 2vw, 26px);
  width: 100%;
  max-width: 760px;
  margin: 30px 0 6px;
}
.bubble {
  position: relative;
  max-width: 230px;
  padding: 12px 16px;
  border-radius: 18px;
  font-size: 13px;
  line-height: 1.6;
}
.bubble::after {
  position: absolute;
  top: 16px;
  width: 10px;
  height: 10px;
  content: "";
  background: inherit;
  transform: rotate(45deg);
}
.bubble-left {
  grid-area: left;
  justify-self: end;
  border: 1px solid rgba(56, 189, 248, .42);
  border-bottom-left-radius: 6px;
  background: rgba(56, 189, 248, .14);
  color: #CDEBFB;
}
.bubble-left::after { left: -5px; }
.bubble-right {
  grid-area: right;
  justify-self: start;
  border: 1px solid rgba(251, 113, 133, .5);
  border-bottom-right-radius: 6px;
  background: rgba(251, 113, 133, .16);
  color: #FFD5DC;
}
.bubble-right::after { right: -5px; }
.wave-core {
  grid-area: core;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: clamp(150px, 24vw, 220px);
  height: clamp(150px, 24vw, 220px);
  flex: none;
}
.ring { position: absolute; border-radius: 50%; border: 1px solid rgba(56, 189, 248, .34); }
.ring-1 { inset: 0; }
.ring-2 { inset: 14%; border-color: rgba(56, 189, 248, .5); }
.ring-3 { inset: 28%; border-color: rgba(251, 113, 133, .5); }
.wave-bars { display: flex; align-items: center; gap: 4px; height: 46px; }
.wave-bars b {
  width: 4px;
  height: var(--h);
  border-radius: 999px;
  background: linear-gradient(180deg, var(--sky), #9AE6FF);
  box-shadow: 0 0 12px rgba(56, 189, 248, .6);
}
.wave-core em {
  position: absolute;
  bottom: -22px;
  color: #7FA6C2;
  font-family: var(--mono);
  font-size: 10px;
  font-style: normal;
  letter-spacing: 1px;
}
.hold-pill {
  grid-area: hold;
  justify-self: center;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 11px 26px;
  margin-top: 18px;
  border: 1px solid rgba(56, 189, 248, .45);
  border-radius: 999px;
  background: rgba(15, 23, 42, .72);
  color: #D6EEFB;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 2px;
}
.hold-pill i { width: 9px; height: 9px; border-radius: 50%; background: var(--pink); box-shadow: 0 0 0 4px rgba(251, 113, 133, .2); }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; justify-content: center; gap: 20px; margin-top: 24px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  gap: 14px;
  padding: 0 28px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 900;
  transition: transform .18s ease, background .18s ease, color .18s ease;
}
.button-primary { background: var(--sky); color: #06202E; box-shadow: 0 14px 34px rgba(56, 189, 248, .26); }
.button-primary:hover { background: #7DD3FC; transform: translateY(-2px); }
.button-large { min-height: 54px; padding: 0 36px; font-size: 15px; }
.text-link { color: #A9C6DD; border-bottom: 1px dashed #3E6079; font-size: 13px; font-weight: 800; }
.text-link span { display: inline-block; margin-left: 5px; color: var(--pink); }

/* features */
.features { padding: 72px 0 70px; border-bottom: 1px solid var(--line); background: #fff; }
.section-heading { margin-bottom: 28px; }
.section-heading h2, .download h2 { margin: 0; font-size: clamp(24px, 2.8vw, 35px); font-weight: 900; letter-spacing: -.6px; line-height: 1.3; }
.section-heading > p:last-child { max-width: 620px; margin: 12px 0 0; color: var(--muted); font-size: 14px; }
.section-heading-split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(200px, 320px); align-items: end; gap: 26px; }
.section-heading-split > p:last-child { margin: 0 0 4px; }
.feature-strip {
  display: flex;
  gap: 14px;
  padding: 4px max(24px, calc((100vw - var(--shell)) / 2 + 24px)) 18px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-color: var(--sky) var(--bg-2);
}
.feature-card {
  flex: 0 0 clamp(232px, 26vw, 286px);
  padding: 24px 22px 22px;
  border: 1px solid var(--line);
  border-bottom: 3px solid var(--sky);
  border-radius: 14px;
  background: linear-gradient(170deg, #FFFFFF, #F1F9FF);
  scroll-snap-align: start;
}
.feature-no { display: block; margin-bottom: 10px; color: var(--sky-deep); font-family: var(--mono); font-size: 11px; font-weight: 700; letter-spacing: 1.6px; }
.feature-card h3 { margin: 0 0 7px; font-size: 17px; font-weight: 900; }
.feature-card p { margin: 0; color: var(--muted); font-size: 12.8px; line-height: 1.8; }

/* shots */
.shots { padding: 72px 0 78px; }
.shot-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); align-items: start; gap: 14px; }
.shot-card { margin: 0; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); overflow: hidden; }
.shot-card img { width: 100%; height: auto; aspect-ratio: 3 / 5; object-fit: cover; object-position: center 8%; }
.shot-card:nth-child(2) img { aspect-ratio: 3 / 6.4; }
.shot-card:nth-child(3) img { aspect-ratio: 3 / 4.6; }
.shot-card:nth-child(4) img { aspect-ratio: 3 / 5.6; }
.shot-card figcaption { display: flex; align-items: baseline; gap: 8px; padding: 11px 13px 12px; border-top: 1px solid var(--line); }
.shot-card figcaption b { color: var(--pink); font-family: var(--mono); font-size: 10px; }
.shot-card figcaption span { display: flex; flex-direction: column; font-size: 13px; font-weight: 800; line-height: 1.4; }
.shot-card figcaption small { color: var(--muted); font-size: 10.5px; font-weight: 500; }

/* faq */
.faq { padding: 72px 0 78px; border-top: 1px solid var(--line); background: var(--bg-2); }
.faq-layout { display: grid; grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr); gap: clamp(24px, 4vw, 52px); }
.faq-heading { position: sticky; top: calc(var(--header-height) + 26px); align-self: start; }
.faq-list { display: grid; gap: 10px; }
.faq-list details { border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.faq-list summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 15px 18px; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary h3 { margin: 0; font-size: 15px; font-weight: 900; }
.faq-list summary i { position: relative; flex: none; width: 20px; height: 20px; border-radius: 50%; background: var(--bg-2); }
.faq-list summary i::before,
.faq-list summary i::after { position: absolute; top: 50%; left: 50%; width: 8px; height: 1.5px; content: ""; background: var(--sky-deep); 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[open] summary { border-bottom: 1px solid var(--line); }
.faq-list details p { padding: 13px 18px 16px; margin: 0; color: var(--muted); font-size: 13.5px; line-height: 1.85; }

/* reviews */
.reviews { padding: 74px 0 80px; }
.review-list { display: grid; gap: 12px; padding: 0; margin: 0; list-style: none; max-width: 840px; }
.review-card {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  align-items: start;
  gap: 14px;
  padding: 16px 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
}
.review-avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(150deg, var(--sky), var(--pink));
  color: #fff;
  font-size: 15px;
  font-weight: 900;
}
.review-meta { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 4px; }
.review-meta b { color: var(--ink); font-size: 13px; font-weight: 900; }
.review-meta time { color: #8AA6BE; font-family: var(--mono); font-size: 10px; }
.review-card p { margin: 0; color: #3E546B; font-size: 13px; line-height: 1.78; }

/* steps */
.steps { padding: 70px 0 76px; border-top: 1px solid var(--line); background: #fff; }
.step-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; padding: 0; margin: 0; list-style: none; }
.step-list li {
  position: relative;
  padding: 22px 20px 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--bg);
}
.step-list li::before {
  position: absolute;
  top: 0;
  left: 20px;
  width: 44px;
  height: 3px;
  content: "";
  background: var(--pink);
}
.step-list span { display: block; margin: 6px 0 8px; color: var(--sky-deep); font-family: var(--mono); font-size: 12px; font-weight: 700; letter-spacing: 1.6px; }
.step-list h3 { margin: 0 0 5px; font-size: 16px; font-weight: 900; }
.step-list p { margin: 0; color: var(--muted); font-size: 12.8px; line-height: 1.72; }

/* download */
.download { padding: 26px 0; }
.download-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 44px clamp(24px, 5vw, 56px) 40px;
  border: 1px solid #BFE3F7;
  border-radius: 20px;
  background:
    radial-gradient(420px 240px at 10% 0%, rgba(56, 189, 248, .2), transparent 70%),
    radial-gradient(360px 220px at 92% 100%, rgba(251, 113, 133, .16), transparent 72%),
    linear-gradient(140deg, #0F172A, #12233A 78%);
  text-align: center;
}
.download-inner .eyebrow { color: var(--sky); justify-content: center; }
.download h2 { color: #fff; max-width: 620px; }
.download-copy { min-width: 0; }
.download-copy > p { max-width: 520px; margin: 13px 0 0; color: #A9C6DD; font-size: 14px; }
.download .button-primary { background: var(--sky); color: #06202E; margin-bottom: 24px; }
.download-notes { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 22px; padding: 18px 0 0; margin: 22px 0 0; border-top: 1px solid rgba(56, 189, 248, .24); list-style: none; }
.download-notes li { color: #9FD8F7; font-family: var(--mono); font-size: 11px; }
.download-notes li::before { margin-right: 8px; content: "·"; color: var(--pink); }

/* 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-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: var(--muted); font-size: 12px; }
.footer-nav a:hover { color: var(--sky-deep); }
.footer-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px; margin-top: 22px; padding-top: 17px; 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: #6E859B; font-size: 11.5px; line-height: 1.8; }

/* responsive */
@media (max-width: 1000px) {
  .shot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .shot-card img, .shot-card:nth-child(2) img, .shot-card:nth-child(3) img, .shot-card:nth-child(4) img { aspect-ratio: 3 / 5; }
  .shot-card:nth-child(2) img { aspect-ratio: 3 / 6.2; }
  .shot-card:nth-child(3) img { aspect-ratio: 3 / 4.6; }
  .shot-card:nth-child(4) img { aspect-ratio: 3 / 5.4; }
}
@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(15, 23, 42, .18);
  }
  .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; }
  .faq-heading { position: static; }
  .voice-stage { max-width: 620px; }
}
@media (max-width: 768px) {
  .hero-stage { padding: 42px 0 38px; }
  .step-list { grid-template-columns: 1fr; }
  .review-list { max-width: none; }
  .section-heading-split { grid-template-columns: 1fr; gap: 10px; }
  .section-heading-split > p:last-child { margin: 0; }
}
@media (max-width: 560px) {
  .page-shell, .nav-shell { width: calc(100% - 32px); }
  .hero h1 { font-size: clamp(46px, 15vw, 64px); }
  .hero-lead { font-size: 13.5px; }
  .voice-stage { grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); gap: 6px; }
  .bubble { padding: 9px 11px; font-size: 11.5px; border-radius: 14px; }
  .wave-core { width: 120px; height: 120px; }
  .wave-bars { gap: 3px; height: 34px; }
  .wave-bars b { width: 3px; }
  .hold-pill { margin-top: 30px; padding: 10px 18px; font-size: 12px; }
  .shot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .shot-card img, .shot-card:nth-child(2) img, .shot-card:nth-child(3) img, .shot-card:nth-child(4) img { aspect-ratio: 3 / 5; }
  .review-card { grid-template-columns: 34px minmax(0, 1fr); gap: 10px; padding: 14px 15px; }
  .review-avatar { width: 34px; height: 34px; font-size: 12px; }
  .review-meta { flex-direction: column; align-items: flex-start; gap: 2px; }
  .feature-strip { padding-left: 16px; padding-right: 16px; }
  .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 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: 15.5px; }
  .bubble { font-size: 10.5px; padding: 8px 9px; }
  .wave-core { width: 104px; height: 104px; }
  .button { width: 100%; }
  .download-inner { padding: 32px 18px; }
}