@charset "UTF-8";

:root {
  --bg: #f5f3fc;
  --bg-2: #efeaff;
  --panel: #ffffff;
  --line: #ddd5f3;
  --ink: #17214a;
  --muted: #5c6684;
  --blue: #2f5fd0;
  --blue-deep: #24479b;
  --lav: #c7b8ff;
  --lav-soft: #ece6ff;
  --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%; height: auto; }
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: 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(--blue);
  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(245, 243, 252, .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: 16px;
}
.brand { display: inline-flex; align-items: center; flex: none; gap: 9px; font-size: 19px; font-weight: 900; letter-spacing: -.2px; }
.brand img { width: 36px; height: 36px; border: 1px solid var(--line); border-radius: 10px; object-fit: contain; background: #fff; }
.brand-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--lav); box-shadow: 0 0 0 4px rgba(199, 184, 255, .32); }
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; align-items: center; gap: clamp(10px, 1.6vw, 22px); padding: 0; margin: 0; list-style: none; }
.primary-nav a { display: block; padding: 7px 0; border-bottom: 2px solid transparent; color: #4d5878; font-size: 13px; font-weight: 700; white-space: nowrap; }
.primary-nav a:hover { border-bottom-color: var(--blue); color: var(--blue); }
.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;
  padding: 0 18px;
  border-radius: 999px;
  background: var(--blue);
  color: #fff;
  font-size: 13px;
  font-weight: 900;
  white-space: nowrap;
  box-shadow: 0 10px 22px rgba(47, 95, 208, .26);
  transition: background .18s ease;
}
.nav-download:hover { background: var(--blue-deep); }
.menu-toggle { display: none; width: 42px; height: 42px; padding: 0; border: 1px solid var(--line); border-radius: 50%; 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: memory rail + copy + chat window */
.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(640px 420px at 84% 0%, rgba(199, 184, 255, .55), transparent 72%),
    radial-gradient(480px 340px at 4% 96%, rgba(47, 95, 208, .12), transparent 70%),
    linear-gradient(180deg, #f2eeff 0%, var(--bg) 100%);
}
.hero::before {
  position: absolute;
  inset: 0;
  content: "";
  background-image: radial-gradient(rgba(47, 95, 208, .18) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .7), transparent 70%);
  pointer-events: none;
}
.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 176px minmax(0, 1fr) 356px;
  align-items: center;
  gap: clamp(18px, 2.4vw, 34px);
  padding: 54px 0 22px;
}
.memory-rail {
  align-self: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 16px 14px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, .72);
}
.rail-title { margin: 0 0 12px; color: var(--blue); font-family: var(--mono); font-size: 10px; letter-spacing: 1.6px; white-space: nowrap; }
.memory-rail ol { position: relative; display: grid; gap: 14px; padding: 0 0 0 14px; margin: 0; list-style: none; }
.memory-rail ol::before { position: absolute; top: 5px; bottom: 6px; left: 4px; width: 1px; content: ""; background: linear-gradient(180deg, var(--lav), rgba(199, 184, 255, .2)); }
.memory-rail li { position: relative; }
.memory-rail li::before {
  position: absolute;
  top: 6px;
  left: -14px;
  width: 7px;
  height: 7px;
  border: 1px solid var(--blue);
  border-radius: 50%;
  background: #fff;
  content: "";
}
.memory-rail time { display: block; color: #8d84b5; font-family: var(--mono); font-size: 9.5px; letter-spacing: .6px; }
.memory-rail b { display: block; font-size: 12.5px; font-weight: 900; }
.memory-rail span { display: block; color: var(--muted); font-size: 10.5px; line-height: 1.5; }
.hero-copy { min-width: 0; }
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 14px;
  color: #5b4d8d;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 1.4px;
}
.hero-kicker b {
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--blue);
  color: #fff;
  font-size: 9px;
  letter-spacing: 1.1px;
}
.hero h1 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(40px, 5.4vw, 68px);
  font-weight: 900;
  letter-spacing: clamp(-2px, -.3vw, -3px);
  line-height: 1;
}
.hero-subtitle { margin: 16px 0 0; color: var(--blue); font-size: clamp(17px, 1.9vw, 22px); font-weight: 800; line-height: 1.4; }
.hero-lead { max-width: 440px; margin: 12px 0 0; color: var(--muted); font-size: 14px; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 16px; margin-top: 24px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  gap: 12px;
  padding: 0 26px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 900;
  transition: transform .18s ease, background .18s ease, color .18s ease;
}
.button svg { width: 18px; height: 18px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.button-primary { background: var(--blue); color: #fff; box-shadow: 0 14px 28px rgba(47, 95, 208, .24); }
.button-primary:hover { background: var(--blue-deep); transform: translateY(-2px); }
.button-large { min-height: 54px; padding: 0 34px; font-size: 15px; }
.text-link { color: var(--blue); border-bottom: 1px dashed rgba(47, 95, 208, .4); font-size: 13px; font-weight: 800; }
.text-link span { display: inline-block; margin-left: 4px; }

.chat-window {
  min-width: 0;
  padding: 12px;
  border: 1px solid rgba(199, 184, 255, .9);
  border-radius: 22px;
  background: #fff;
  box-shadow: 0 24px 54px rgba(58, 42, 120, .18);
}
.chat-head { display: flex; align-items: center; gap: 9px; padding: 2px 2px 10px; }
.chat-ava {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  flex: none;
  border-radius: 50%;
  background: linear-gradient(140deg, var(--blue), var(--lav));
  color: #fff;
  font-size: 13px;
  font-weight: 900;
}
.chat-name { display: flex; flex-direction: column; line-height: 1.3; }
.chat-name b { font-size: 13px; font-weight: 900; }
.chat-name small { color: var(--muted); font-size: 10px; }
.chat-cover { margin: 0; border-radius: 12px; overflow: hidden; }
.chat-cover img { width: 100%; height: auto; aspect-ratio: 4 / 3; object-fit: cover; object-position: center 54%; }
.chat-body { display: grid; gap: 7px; padding: 11px 2px 8px; }
.bubble { max-width: 92%; margin: 0; padding: 8px 12px; border-radius: 12px; font-size: 11.5px; line-height: 1.65; }
.bubble-in { justify-self: start; border: 1px solid var(--line); border-bottom-left-radius: 3px; background: #f6f3ff; color: #2c3560; }
.bubble-out { justify-self: end; border-bottom-right-radius: 3px; background: var(--blue); color: #fff; }
.chat-input { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 8px 6px 6px 12px; border: 1px solid var(--line); border-radius: 999px; background: #faf8ff; }
.input-ghost { color: #8f97b3; font-size: 11px; }
.input-send { padding: 4px 12px; border-radius: 999px; background: var(--lav-soft); color: var(--blue); font-size: 10.5px; font-weight: 800; }

.remember-tags {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 10px;
  padding: 14px 16px;
  margin-bottom: 36px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, .78);
}
.tags-label { margin: 0; padding: 2px 9px; border-radius: 4px; background: var(--blue); color: #fff; font-family: var(--mono); font-size: 10px; letter-spacing: 1.4px; }
.remember-tags ul { display: flex; flex-wrap: wrap; gap: 7px; padding: 0; margin: 0; list-style: none; }
.remember-tags li { padding: 4px 11px; border: 1px solid rgba(199, 184, 255, .85); border-radius: 999px; background: var(--lav-soft); color: #4b3f7d; font-size: 11.5px; }
.tags-note { margin: 0 0 0 auto; color: var(--muted); font-size: 11px; white-space: nowrap; }

/* features: two columns, icon left */
.features { padding: 72px 0 76px; border-bottom: 1px solid var(--line); background: var(--bg-2); }
.section-heading { margin-bottom: 30px; }
.section-heading h2, .download h2 { margin: 0; color: var(--ink); font-size: clamp(24px, 2.8vw, 34px); font-weight: 900; letter-spacing: -.7px; 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, 290px); align-items: end; gap: 26px; }
.section-heading-split > p:last-child { margin: 0 0 5px; }
.feature-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.feature-card {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  align-items: start;
  gap: 14px;
  padding: 22px 22px 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  box-shadow: 0 8px 20px rgba(70, 52, 130, .06);
}
.feature-ico {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--lav-soft);
  color: var(--blue);
  font-size: 18px;
}
.feature-card h3 { margin: 2px 0 6px; font-size: 16.5px; font-weight: 900; }
.feature-card p { margin: 0; color: var(--muted); font-size: 12.5px; line-height: 1.85; }

/* shots: staggered portrait gallery */
.shots { padding: 72px 0 78px; }
.shot-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); align-items: start; gap: 16px; }
.shot-card {
  display: flex;
  flex-direction: column;
  margin: 0;
  padding: 10px 10px 0;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
  overflow: hidden;
}
.shot-card:nth-child(2) { margin-top: 34px; }
.shot-card:nth-child(3) { margin-top: 12px; }
.shot-card img { width: 100%; height: auto; aspect-ratio: 4 / 5; object-fit: cover; object-position: center 12%; border-radius: 9px; }
.shot-card figcaption { display: flex; flex-direction: column; gap: 3px; padding: 11px 5px 12px; }
.shot-card figcaption b { color: var(--blue); font-family: var(--mono); font-size: 10px; letter-spacing: 1px; }
.shot-card figcaption span { color: var(--muted); font-size: 12px; line-height: 1.6; }

/* 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(24px, 4vw, 50px); }
.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: 15px; font-weight: 900; }
.faq-list summary i { position: relative; flex: none; width: 24px; height: 24px; border-radius: 50%; background: var(--lav-soft); }
.faq-list summary i::before,
.faq-list summary i::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 9px;
  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 28px 17px 0; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.85; }

/* reviews: two columns */
.reviews { padding: 72px 0 78px; }
.review-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; padding: 0; margin: 0; list-style: none; }
.review-card { padding: 18px 20px 17px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); box-shadow: 0 8px 18px rgba(70, 52, 130, .05); }
.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(--blue); font-size: 13px; font-weight: 900; }
.review-meta time { color: #9490b2; font-family: var(--mono); font-size: 10px; }
.review-card p { margin: 0; color: #414a6b; font-size: 12.5px; line-height: 1.8; }

/* steps: three across with arrows */
.steps { padding: 68px 0 74px; border-top: 1px solid var(--line); background: var(--bg-2); }
.step-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; padding: 0; margin: 0; list-style: none; counter-reset: step; }
.step-list li { position: relative; padding: 20px 20px 18px; border-radius: 14px; background: var(--panel); border: 1px solid var(--line); }
.step-list li:not(:last-child)::after {
  position: absolute;
  top: 50%;
  right: -10px;
  z-index: 2;
  content: "→";
  color: var(--lav);
  font-size: 16px;
  transform: translateY(-50%);
}
.step-list span { display: block; margin-bottom: 6px; color: var(--blue); font-family: var(--mono); font-size: 12px; font-weight: 700; letter-spacing: 1.4px; }
.step-list h3 { margin: 0 0 5px; font-size: 16px; font-weight: 900; }
.step-list p { margin: 0; color: var(--muted); font-size: 12.5px; line-height: 1.8; }

/* download: centered */
.download { padding: 26px 0; }
.download-inner {
  padding: 50px clamp(24px, 5vw, 56px) 46px;
  border-radius: 18px;
  background:
    radial-gradient(520px 300px at 50% 0%, rgba(255, 255, 255, .55), transparent 72%),
    linear-gradient(140deg, #3f6fe0, #6a5ae0 58%, #8f79f0);
  color: #fff;
  text-align: center;
}
.download .eyebrow { justify-content: center; color: #e2dcff; }
.download h2 { max-width: 720px; margin: 0 auto; color: #fff; }
.download-inner > p { max-width: 560px; margin: 12px auto 24px; color: #e4e0ff; font-size: 13.5px; }
.download .button-primary { background: #fff; color: var(--blue-deep); box-shadow: 0 14px 26px rgba(20, 30, 80, .22); }
.download .button-primary:hover { background: #f1edff; }
.download-notes { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 22px; padding: 20px 0 0; margin: 26px 0 0; border-top: 1px solid rgba(255, 255, 255, .28); list-style: none; }
.download-notes li { color: #e6e1ff; font-family: var(--mono); font-size: 10.5px; }
.download-notes li::before { margin-right: 7px; content: "·"; }

/* footer */
.site-footer { padding: 40px 0 48px; 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: 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 20px; }
.footer-nav a { color: #4d5878; font-size: 12px; }
.footer-nav a:hover { color: var(--blue); }
.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; }
.footer-meta a { color: var(--muted); }
.disclaimer { grid-column: 1 / -1; margin: 0; color: #8a90ad; font-size: 11.5px; line-height: 1.8; }

/* responsive */
@media (max-width: 1080px) {
  .hero-grid { grid-template-columns: 154px minmax(0, 1fr) 306px; gap: 16px; }
  .chat-cover img { aspect-ratio: 4 / 3; }
}
@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(40, 30, 80, .16);
  }
  .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; padding: 40px 0 18px; gap: 22px; }
  .memory-rail { order: 2; }
  .memory-rail ol { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; padding-left: 12px; }
  .memory-rail ol::before { top: 4px; bottom: auto; left: 2px; width: 1px; height: 10px; }
  .hero-copy { order: 1; }
  .chat-window { order: 3; max-width: 420px; }
  .chat-cover img { aspect-ratio: 4 / 3; }
  .faq-layout { grid-template-columns: 1fr; }
  .faq-heading { position: static; }
  .shot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .shot-card:nth-child(2), .shot-card:nth-child(3) { margin-top: 0; }
  .step-list { grid-template-columns: 1fr; gap: 10px; }
  .step-list li:not(:last-child)::after { top: auto; right: auto; bottom: -12px; left: 50%; transform: translateX(-50%) rotate(90deg); }
  .tags-note { margin-left: 0; }
}
@media (max-width: 600px) {
  .page-shell, .nav-shell { width: calc(100% - 32px); }
  .hero h1 { font-size: clamp(34px, 11vw, 46px); }
  .hero-lead { font-size: 13.5px; }
  .feature-grid { grid-template-columns: 1fr; }
  .memory-rail ol { grid-template-columns: 1fr; }
  .memory-rail ol::before { height: auto; bottom: 6px; }
  .shot-grid { grid-template-columns: 1fr; }
  .review-list { grid-template-columns: 1fr; }
  .section-heading-split { grid-template-columns: 1fr; gap: 8px; }
  .section-heading-split > p:last-child { margin: 0; }
  .download-notes li { font-size: 10px; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 380px) {
  .brand { font-size: 15px; gap: 6px; }
  .brand img { width: 30px; height: 30px; }
  .brand-dot { display: none; }
  .nav-actions { gap: 6px; }
  .nav-download { min-height: 34px; padding: 0 9px; font-size: 10.5px; }
  .menu-toggle { width: 34px; height: 34px; }
  .hero h1 { font-size: 32px; }
  .hero-subtitle { font-size: 15px; }
  .button { width: 100%; }
  .chat-window { padding: 9px; border-radius: 16px; }
}