:root {
  color-scheme: light;
  --home-ink: #182126;
  --home-muted: #68747b;
  --home-line: #e3e8ea;
  --home-accent: #166b67;
  --home-paper: #ffffff;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--home-paper);
  color: var(--home-ink);
  font-family: "Microsoft YaHei UI", "Segoe UI", Arial, sans-serif;
  line-height: 1.7;
}
a { color: inherit; }

.site-shell { overflow: clip; }
.guide-hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  padding: 28px clamp(24px, 6vw, 96px) 34px;
  border-bottom: 1px solid var(--home-line);
}
.site-header {
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
  min-height: 28px;
}
.site-logo {
  max-width: 100%;
  overflow: hidden;
  color: var(--home-ink);
  font-size: 14px;
  font-weight: 800;
  line-height: 1.4;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.hero-intro {
  display: flex;
  flex: 1;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 44px;
  padding: 40px 0 76px;
  text-align: center;
}
.hero-intro h1 {
  width: 100%;
  max-width: 720px;
  margin: 0;
  font-size: 52px;
  line-height: 1.22;
  font-weight: 650;
  letter-spacing: 0;
}
.guide-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  min-width: 206px;
  min-height: 56px;
  padding: 13px 18px 13px 24px;
  border: 1px solid var(--home-ink);
  border-radius: 3px;
  background: var(--home-ink);
  color: #fff;
  text-decoration: none;
  font-size: 14px;
  font-weight: 800;
  box-shadow: 0 8px 18px rgba(24, 33, 38, .08);
  transition: background-color 160ms ease, border-color 160ms ease, gap 160ms ease, box-shadow 160ms ease;
}
.guide-cta:hover, .guide-cta:focus-visible {
  gap: 24px;
  border-color: var(--home-accent);
  background: var(--home-accent);
  box-shadow: 0 10px 22px rgba(22, 107, 103, .16);
}
.guide-cta:focus-visible { outline: 3px solid rgba(22, 107, 103, .22); outline-offset: 4px; }
.guide-cta-arrow { font-size: 21px; line-height: 1; }

.product-showcase {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 14vh 20px 16vh;
  text-align: center;
}
.showcase-copy { max-width: 700px; margin-bottom: 46px; }
.showcase-copy h2, .seo-section h2 {
  margin: 0 0 18px;
  font-size: 34px;
  line-height: 1.3;
  letter-spacing: 0;
}
.product-figure { width: min(100%, 960px); margin: 0; }
.product-figure img {
  display: block;
  aspect-ratio: 900 / 1040;
  width: 100%;
  height: auto;
  border: 1px solid #cbd4d8;
  box-shadow: 0 16px 42px rgba(24, 33, 38, .12);
  background: #0b1014;
}
.showcase-actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-top: 34px;
}
.trial-cta, .section-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  min-height: 52px;
  padding: 12px 22px;
  border: 1px solid var(--home-ink);
  border-radius: 3px;
  color: #fff;
  background: var(--home-ink);
  font-size: 14px;
  font-weight: 800;
  line-height: 1.3;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 8px 18px rgba(24, 33, 38, .08);
  transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease, gap 160ms ease, box-shadow 160ms ease;
}
.section-cta {
  color: var(--home-ink);
  background: #fff;
  box-shadow: none;
}
.trial-cta:hover, .trial-cta:focus-visible, .section-cta:hover, .section-cta:focus-visible {
  gap: 22px;
  border-color: var(--home-accent);
  background: var(--home-accent);
  color: #fff;
  box-shadow: 0 10px 22px rgba(22, 107, 103, .16);
}
.trial-cta:focus-visible, .section-cta:focus-visible { outline: 3px solid rgba(22, 107, 103, .22); outline-offset: 4px; }
.trial-status {
  position: absolute;
  z-index: 2;
  top: calc(100% + 9px);
  left: 50%;
  padding: 4px 9px;
  border: 1px solid var(--home-line);
  border-radius: 3px;
  background: #fff;
  color: var(--home-muted);
  font-size: 13px;
  line-height: 1.4;
  pointer-events: none;
  transform: translateX(-50%);
  white-space: nowrap;
}
.trial-cta:disabled { cursor: default; }
.tutorial-section {
  display: grid;
  grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
  align-items: center;
  gap: clamp(28px, 6vw, 80px);
}
.tutorial-copy { min-width: 0; }
.tutorial-copy h2 { max-width: 430px; margin-bottom: 34px; }
.tutorial-media { min-width: 0; }
.tutorial-scene {
  position: relative;
  aspect-ratio: 850 / 615;
  overflow: hidden;
  border: 1px solid #bfc9cd;
  border-radius: 4px;
  background: #111719;
  box-shadow: 0 18px 44px rgba(24, 33, 38, .14);
  isolation: isolate;
}
.tutorial-table {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: translateX(0) scale(1);
  transition: filter 440ms ease, transform 520ms ease;
}
.tutorial-bind-frame {
  position: absolute;
  z-index: 2;
  inset: 8px;
  border: 2px solid rgba(255, 255, 255, .88);
  border-radius: 3px;
  opacity: 0;
  transform: scale(.985);
}
.tutorial-bind-key,
.tutorial-capture-key,
.tutorial-bind-status,
.tutorial-board-focus {
  position: absolute;
  z-index: 4;
  opacity: 0;
  transition: opacity 220ms ease, transform 300ms ease;
}
.tutorial-bind-key,
.tutorial-capture-key {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 9px;
  border: 1px solid rgba(255, 255, 255, .28);
  border-radius: 3px;
  background: rgba(12, 17, 20, .9);
  color: #eaf0f1;
  font-size: 12px;
  font-weight: 700;
  box-shadow: 0 8px 20px rgba(0, 0, 0, .24);
}
.tutorial-bind-key { right: 4%; bottom: 5%; transform: translateY(8px); }
.tutorial-capture-key { left: 6%; bottom: 7%; transform: translateY(8px); }
.tutorial-bind-key kbd,
.tutorial-capture-key kbd {
  min-width: 29px;
  padding: 4px 7px;
  border: 1px solid #819097;
  border-bottom-width: 2px;
  border-radius: 3px;
  background: #f5f7f7;
  color: #1b2529;
  font: 800 12px/1 "Segoe UI", sans-serif;
  text-align: center;
}
.tutorial-bind-status {
  top: 6%;
  left: 50%;
  padding: 6px 10px;
  border-radius: 3px;
  background: rgba(18, 107, 89, .92);
  color: #fff;
  font-size: 12px;
  font-weight: 800;
  transform: translate(-50%, -8px);
}
.tutorial-board-focus {
  top: 39%;
  left: 28.5%;
  width: 25.5%;
  height: 17.5%;
  border: 2px solid rgba(255, 255, 255, .94);
  border-radius: 4px;
  box-shadow: 0 0 0 999px rgba(8, 13, 14, .22), 0 0 20px rgba(255, 255, 255, .32);
  transform: scale(.94);
}
.tutorial-board-focus span {
  position: absolute;
  top: -29px;
  left: -2px;
  padding: 3px 8px;
  border-radius: 3px;
  background: #fff;
  color: #1a2428;
  font-size: 11px;
  font-weight: 900;
}
.tutorial-result {
  position: absolute;
  z-index: 3;
  top: 0;
  right: 0;
  bottom: 0;
  width: 57%;
  overflow: hidden;
  border-left: 1px solid #526069;
  background: #0d1115;
  opacity: 0;
  transform: translateX(102%);
  transition: opacity 260ms ease, transform 560ms cubic-bezier(.2, .8, .2, 1);
}
.tutorial-result > span {
  position: absolute;
  z-index: 2;
  top: 8px;
  left: 11px;
  color: #eff3f4;
  font-size: 11px;
  font-weight: 800;
}
.tutorial-result img {
  display: block;
  width: 100%;
  height: 100%;
  padding: 28px 7px 7px;
  object-fit: contain;
}
.tutorial-media[data-tutorial-stage="1"] .tutorial-bind-frame {
  opacity: 1;
  animation: tutorial-bind-pulse 1.25s ease-in-out infinite;
}
.tutorial-media[data-tutorial-stage="1"] .tutorial-bind-key,
.tutorial-media[data-tutorial-stage="1"] .tutorial-bind-status,
.tutorial-media[data-tutorial-stage="2"] .tutorial-board-focus,
.tutorial-media[data-tutorial-stage="3"] .tutorial-capture-key {
  opacity: 1;
  transform: translateY(0);
}
.tutorial-media[data-tutorial-stage="1"] .tutorial-bind-status { transform: translate(-50%, 0); }
.tutorial-media[data-tutorial-stage="2"] .tutorial-table { transform: scale(1.025); }
.tutorial-media[data-tutorial-stage="2"] .tutorial-board-focus { transform: scale(1); }
.tutorial-media[data-tutorial-stage="3"] .tutorial-table {
  filter: brightness(.58) saturate(.76);
  transform: translateX(-18%) scale(.96);
}
.tutorial-media[data-tutorial-stage="3"] .tutorial-result {
  opacity: 1;
  transform: translateX(0);
}
@keyframes tutorial-bind-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 255, 255, .12); }
  50% { box-shadow: 0 0 0 6px rgba(255, 255, 255, .3); }
}
.faq-section { padding-bottom: 50px; }
.faq-item {
  padding: 0;
  border-top: 1px solid var(--home-line);
}
.faq-item:last-of-type { border-bottom: 1px solid var(--home-line); }
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 0;
  color: var(--home-ink);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
  cursor: pointer;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  flex: 0 0 auto;
  color: var(--home-accent);
  content: "+";
  font-size: 24px;
  font-weight: 400;
  line-height: 1;
}
.faq-item[open] summary::after { content: "−"; }
.faq-answer {
  max-width: 760px;
  padding: 0 44px 22px 0;
  color: var(--home-muted);
}
.steps {
  display: grid;
  gap: 4px;
  padding: 0;
  margin: 28px 0 0;
  list-style: none;
}
.steps li {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  border-left: 2px solid transparent;
  padding: 12px 0 12px 12px;
  opacity: .42;
  transition: border-color 180ms ease, opacity 180ms ease, transform 220ms ease;
}
.steps li[aria-current="step"] {
  border-left-color: var(--home-accent);
  opacity: 1;
  transform: translateX(4px);
}
.steps span {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--home-accent);
  border-radius: 50%;
  color: var(--home-accent);
  font-weight: 800;
  transition: background-color 180ms ease, color 180ms ease;
}
.steps li[aria-current="step"] span { background: var(--home-accent); color: #fff; }
.steps p { margin: 3px 0 0; color: var(--home-muted); line-height: 1.7; }
.steps li[aria-current="step"] p { color: var(--home-ink); }
.seo-section {
  width: min(1000px, calc(100% - 40px));
  margin: 0 auto;
  padding: 96px 0;
  border-top: 1px solid var(--home-line);
}
.faq-section { padding-bottom: 50px; }
footer { width: min(900px, calc(100% - 40px)); margin: 0 auto; padding: 24px 0 60px; color: var(--home-muted); font-size: 13px; }

@media (max-width: 680px) {
  .guide-hero { padding: 20px 20px 24px; }
  .site-logo { font-size: 13px; }
  .hero-intro { gap: 32px; padding: 30px 0 60px; }
  .hero-intro h1 { max-width: 340px; font-size: 34px; line-height: 1.36; overflow-wrap: anywhere; }
  .showcase-copy h2, .seo-section h2 { font-size: 27px; }
  .product-figure { width: min(100%, 560px); }
  .showcase-actions { margin-top: 26px; }
  .tutorial-section { display: block; }
  .tutorial-copy { margin-bottom: 34px; }
  .tutorial-media { width: 100%; }
  .seo-section { padding: 70px 0; }
  .faq-item summary { font-size: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .guide-cta, .trial-cta, .section-cta,
  .tutorial-table, .tutorial-result, .tutorial-bind-key, .tutorial-capture-key,
  .tutorial-bind-status, .tutorial-board-focus, .steps li, .steps span { transition: none; }
  .tutorial-bind-frame { animation: none !important; }
}