:root {
  color-scheme: light;
  --paper: #f8f7f5;
  --surface: #ffffff;
  --ink: #18202b;
  --muted: #5c6470;
  --line: #dededc;
  --red: #b80f28;
  --red-dark: #930a1e;
  --cream: #f3f0ec;
  --night: #171e2a;
  --container: 1280px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif; -webkit-font-smoothing: antialiased; }
img, video { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
a:focus-visible, summary:focus-visible, video:focus-visible { outline: 3px solid var(--red); outline-offset: 4px; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .9em; }
.container { width: min(var(--container), calc(100% - 72px)); margin-inline: auto; }
.skip-link { position: absolute; z-index: 50; top: -100px; left: 20px; background: var(--red); color: white; padding: 10px 18px; }
.skip-link:focus { top: 16px; }
.site-header { position: sticky; top: 0; z-index: 30; background: rgba(248,247,245,.95); border-bottom: 1px solid var(--line); backdrop-filter: blur(20px); }
.header-inner { min-height: 83px; display: flex; align-items: center; gap: 32px; }
.brand { display: inline-flex; align-items: center; gap: 12px; white-space: nowrap; font-size: 17px; font-weight: 550; letter-spacing: -.04em; }
.brand img { border-radius: 10px; box-shadow: 0 6px 14px rgba(184,15,40,.16); }
.brand strong { color: var(--red); font-weight: 780; }
.main-nav { display: flex; align-items: center; justify-content: center; gap: clamp(16px,2.5vw,38px); margin-left: auto; }
.main-nav a { color: #505762; font-size: 13px; font-weight: 600; transition: color .2s ease; white-space: nowrap; }
.main-nav a:hover, .main-nav a[aria-current="page"] { color: var(--red); }
.header-download { display: inline-flex; align-items: center; gap: 16px; padding: 12px 16px; border: 1px solid var(--ink); font-size: 12px; font-weight: 750; white-space: nowrap; transition: transform .4s cubic-bezier(.2,.8,.2,1), background .2s ease, color .2s ease; }
.header-download:hover { background: var(--ink); color: white; transform: translateY(-2px); }
.header-download span { font-size: 15px; }

.eyebrow { display: flex; align-items: center; gap: 10px; margin: 0 0 26px; color: var(--red); font-size: 12px; font-weight: 800; letter-spacing: .12em; }
.eyebrow-line { width: 28px; height: 2px; background: currentColor; }
.hero { overflow: hidden; padding: 100px 0 88px; background: var(--paper); }
.hero-grid { display: grid; grid-template-columns: minmax(340px,.83fr) minmax(0,1.17fr); gap: 5%; align-items: center; }
.hero h1, .guide-hero h1 { margin: 0; line-height: 1.17; letter-spacing: -.055em; font-weight: 800; }
.hero h1 { display: flex; flex-direction: column; gap: 24px; }
.hero-product-name { max-width: 570px; font-size: clamp(27px,3.2vw,43px); line-height: 1.2; letter-spacing: -.045em; }
.hero h1 em { color: var(--red); font-size: clamp(42px,4.1vw,58px); font-style: normal; line-height: 1.24; }
.guide-hero h1 em { color: var(--red); font-style: normal; }
.hero-lead { max-width: 550px; margin: 34px 0 30px; color: #4b5562; font-size: 17px; line-height: 1.95; }
.hero-actions, .guide-hero-links { display: flex; flex-wrap: wrap; align-items: center; gap: 28px; }
.button { min-height: 52px; display: inline-flex; align-items: center; justify-content: space-between; gap: 28px; padding: 0 22px; font-size: 14px; font-weight: 750; transition: transform .4s cubic-bezier(.2,.8,.2,1), background .2s ease, border-color .2s ease, color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button:active, .header-download:active { transform: scale(.97); transition-duration: .08s; transition-timing-function: ease-out; }
.button-primary { background: var(--red); color: white; border: 1px solid var(--red); }
.button-primary:hover { background: var(--red-dark); border-color: var(--red-dark); }
.button-outline { border: 1px solid #b8b9ba; background: transparent; }
.button-outline:hover { border-color: var(--ink); background: white; }
.button span { font-size: 20px; line-height: 1; font-weight: 400; }
.text-link { display: inline-flex; align-items: center; gap: 12px; border-bottom: 1px solid var(--red); padding: 6px 0 7px; color: var(--red); font-size: 13px; font-weight: 780; transition: gap .2s ease; }
.text-link:hover { gap: 19px; }
.text-link span { font-size: 19px; line-height: 1; font-weight: 400; }
.hero-visual { background: #fff; box-shadow: 0 22px 52px rgba(29,36,46,.10); }
.hero-visual img { width: 100%; border: 1px solid #e0dedc; }
.section-pad { padding: 116px 0; }
.section-heading { max-width: 710px; margin-bottom: 54px; }
.section-heading .eyebrow { margin-bottom: 17px; }
.section-heading h2, .demo-copy h2, .agent-copy h2, .download-grid h2, .guide-end h2 { margin: 0; font-size: clamp(35px,3.65vw,54px); font-weight: 820; line-height: 1.29; letter-spacing: -.055em; }
.section-heading > p:last-child { margin: 20px 0 0; color: var(--muted); font-size: 16px; line-height: 1.9; }
.workflow-section { background: var(--surface); }
.workflow-track { display: grid; grid-template-columns: repeat(3,1fr); border-top: 2px solid var(--ink); }
.workflow-step { min-height: 220px; display: flex; gap: 24px; padding: 30px 30px 15px 0; border-right: 1px solid var(--line); }
.workflow-step:not(:first-child) { padding-left: 30px; }
.workflow-step:last-child { border-right: 0; }
.step-number { color: var(--red); font-size: 13px; font-weight: 800; letter-spacing: .04em; }
.workflow-step h3 { margin: 0 0 18px; font-size: 22px; letter-spacing: -.04em; }
.workflow-step p { margin: 0; max-width: 280px; color: var(--muted); font-size: 14px; line-height: 1.9; }
.demo-section { background: var(--night); color: white; }
.demo-grid { display: grid; grid-template-columns: minmax(245px,.62fr) minmax(0,1.38fr); gap: 7%; align-items: center; }
.demo-copy h2 { font-size: clamp(36px,3.9vw,57px); }
.demo-copy .text-link { margin-top: 30px; }
.text-link-light { color: white; border-color: #fd7990; }
.video-frame { margin: 0; background: #111; box-shadow: 0 24px 60px rgba(0,0,0,.24); }
.video-frame video { width: 100%; aspect-ratio: 16/9; background: #111; object-fit: contain; }
.features-section { background: var(--paper); }
.feature-heading { margin-bottom: 75px; }
.feature-row { display: grid; grid-template-columns: minmax(250px,.68fr) minmax(0,1.32fr); gap: 7%; align-items: center; margin-bottom: 120px; }
.feature-row:last-child { margin-bottom: 0; }
.feature-row-reverse { grid-template-columns: minmax(0,1.32fr) minmax(250px,.68fr); }
.feature-row-reverse .feature-copy { grid-column: 2; grid-row: 1; }
.feature-row-reverse .feature-media { grid-column: 1; grid-row: 1; }
.feature-index { display: inline-block; margin-bottom: 24px; color: var(--red); font-size: 12px; font-weight: 700; letter-spacing: .02em; }
.feature-copy h3 { margin: 0; max-width: 380px; font-size: clamp(31px,3.2vw,44px); line-height: 1.36; letter-spacing: -.055em; }
.feature-copy p, .agent-copy p { margin: 24px 0 24px; max-width: 390px; color: var(--muted); font-size: 15px; line-height: 2; }
.feature-media, .agent-media { margin: 0; padding: 10px; border: 1px solid #dedbd8; background: #fff; box-shadow: 0 25px 50px rgba(29,36,46,.09); }
.feature-media img, .agent-media img { width: 100%; border: 1px solid #e8e6e4; }
.feature-media figcaption, .agent-media figcaption { padding: 13px 3px 3px; color: #777d85; font-size: 11px; letter-spacing: .05em; }
.agent-section { background: #edeae5; }
.agent-grid { display: grid; grid-template-columns: minmax(250px,.7fr) minmax(0,1.3fr); gap: 7%; align-items: center; }
.agent-copy h2 { max-width: 410px; }
.agent-copy p { max-width: 400px; }
.download-section { background: #fff; border-top: 1px solid var(--line); }
.download-grid { display: grid; grid-template-columns: minmax(0,1.2fr) minmax(260px,.8fr); gap: 12%; align-items: center; }
.download-grid h2 { margin-bottom: 26px; }
.download-grid p:not(.eyebrow) { max-width: 600px; color: var(--muted); font-size: 15px; line-height: 1.95; }
.download-grid .release-note { margin-top: 22px; color: #8b5a39 !important; font-size: 13px !important; }
.download-actions { display: flex; flex-direction: column; gap: 11px; }
.download-actions .button-wide { width: 100%; min-height: 62px; }
.download-actions p { margin: 7px 0 0; color: #838892 !important; font-size: 12px !important; text-align: center; }
.site-footer { padding: 60px 0 44px; background: var(--night); color: #eff0f2; }
.footer-inner { display: grid; grid-template-columns: 1.1fr .9fr; gap: 8px 30px; align-items: center; }
.footer-brand { display: flex; align-items: center; gap: 12px; font-size: 17px; font-weight: 700; }
.footer-brand img { border-radius: 8px; }
.footer-inner > p { margin: 12px 0; color: #abb3bf; font-size: 13px; }
.footer-inner nav { grid-column: 2; grid-row: 1 / span 2; display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 20px; }
.footer-inner nav a { color: #d5d9df; font-size: 12px; }
.footer-inner nav a:hover { color: white; text-decoration: underline; }
.footer-inner small { grid-column: 1 / -1; margin-top: 40px; padding-top: 22px; border-top: 1px solid #404855; color: #8d96a3; font-size: 11px; }

.guide-hero { padding: 95px 0 100px; background: linear-gradient(110deg, #f8f7f5 55%, #efeae6); border-bottom: 1px solid var(--line); }
.guide-hero-inner { max-width: 900px; }
.guide-hero h1 { font-size: clamp(48px,5.3vw,76px); }
.guide-hero-inner > p:not(.eyebrow) { max-width: 670px; margin: 28px 0 31px; color: var(--muted); font-size: 16px; line-height: 1.95; }
.guide-layout { display: grid; grid-template-columns: 228px minmax(0,1fr); gap: clamp(50px,7vw,110px); padding-top: 85px; padding-bottom: 90px; }
.guide-sidebar-inner { position: sticky; top: 118px; }
.sidebar-label { margin: 0 0 22px; color: #818791; font-size: 11px; font-weight: 800; letter-spacing: .16em; }
.guide-sidebar nav { display: flex; flex-direction: column; border-left: 1px solid var(--line); }
.guide-sidebar nav a { padding: 12px 0 12px 19px; color: #535c69; font-size: 13px; font-weight: 650; border-left: 2px solid transparent; margin-left: -1px; }
.guide-sidebar nav a:hover, .guide-sidebar nav a:focus-visible { color: var(--red); border-left-color: var(--red); }
.sidebar-help { display: flex; flex-direction: column; gap: 10px; margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--line); font-size: 12px; }
.sidebar-help > span { color: #8a9097; }
.sidebar-help a { color: var(--red); font-weight: 750; }
.guide-section { scroll-margin-top: 120px; margin-bottom: 112px; }
.guide-section:last-child { margin-bottom: 0; }
.guide-section-head { margin-bottom: 44px; }
.guide-section-no { color: #777f89; font-size: 12px; font-weight: 650; letter-spacing: .04em; }
.guide-section-head h2 { margin: 9px 0 19px; font-size: clamp(37px,3.5vw,49px); font-weight: 800; letter-spacing: -.055em; line-height: 1.24; }
.guide-section-head p { max-width: 630px; margin: 0; color: #69717c; font-size: 14px; line-height: 1.9; }
.prep-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 16px; }
.prep-item { padding: 24px 24px 28px; border-top: 3px solid var(--red); background: #fff; }
.prep-item > span { color: var(--red); font-size: 11px; font-weight: 800; }
.prep-item h3 { margin: 14px 0 12px; font-size: 20px; letter-spacing: -.03em; }
.prep-item p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.9; }
.guide-callout { margin-top: 22px; padding: 20px 23px; border-left: 3px solid var(--red); background: #f2e9e8; }
.guide-callout-soft { margin: 0 0 34px; background: #f1efec; }
.guide-callout strong { display: block; margin-bottom: 7px; font-size: 13px; }
.guide-callout p { margin: 0; color: #505863; font-size: 13px; line-height: 1.85; }
.guide-steps { counter-reset: steps; list-style: none; margin: 0; padding: 0; }
.guide-steps[start="5"] { counter-reset: steps 4; }
.guide-steps li { counter-increment: steps; position: relative; min-height: 96px; padding: 1px 0 46px 63px; border-left: 1px solid #d4d1ce; margin-left: 18px; }
.guide-steps li:last-child { border-left-color: transparent; }
.guide-steps li::before { content: counter(steps,decimal-leading-zero); position: absolute; top: 0; left: -18px; width: 35px; height: 35px; display: grid; place-items: center; border: 1px solid var(--red); background: var(--paper); color: var(--red); font-size: 12px; font-weight: 800; }
.step-content h3 { margin: 1px 0 16px; font-size: 19px; font-weight: 720; letter-spacing: -.025em; }
.step-content > p { max-width: 650px; margin: 0 0 14px; color: #5c6570; font-size: 13px; line-height: 1.95; }
.step-content .step-result { margin-top: 17px; color: #858c95; font-size: 11px; }
.step-result strong { margin-right: 9px; color: #8a4b54; font-weight: 700; }
.guide-figure { margin: 8px 0 47px; padding: 9px; border: 1px solid #dedbd8; background: #fff; box-shadow: 0 18px 38px rgba(29,36,46,.07); }
.guide-figure img { width: 100%; }
.guide-figure figcaption { padding: 12px 4px 3px; color: #7c838c; font-size: 11px; }
.guide-help details { border-top: 1px solid #d8d7d5; }
.guide-help details:last-child { border-bottom: 1px solid #d8d7d5; }
.guide-help summary { cursor: pointer; padding: 20px 5px; font-size: 15px; font-weight: 700; }
.guide-help details p { max-width: 710px; margin: 0 0 20px; padding: 0 5px; color: var(--muted); font-size: 13px; line-height: 1.85; }
.guide-end { padding: 70px 0; background: #fff; border-top: 1px solid var(--line); }
.guide-end-inner { display: flex; align-items: center; justify-content: space-between; gap: 50px; }
.guide-end .eyebrow { margin-bottom: 15px; }
.guide-end h2 { font-size: clamp(30px,3vw,43px); }
.guide-end-inner > div:last-child { display: flex; align-items: center; gap: 25px; flex-wrap: wrap; }

@media (max-width: 1100px) {
  .header-inner { gap: 22px; }
  .main-nav { gap: 16px; }
  .hero-grid { gap: 3%; }
}
@media (max-width: 900px) {
  .container { width: min(var(--container), calc(100% - 48px)); }
  .hero { padding-top: 70px; }
  .hero-grid, .demo-grid, .agent-grid, .download-grid { grid-template-columns: 1fr; }
  .hero-copy { padding-bottom: 10px; }
  .hero-visual { max-width: 760px; margin-top: 42px; }
  .video-frame { margin-top: 30px; }
  .feature-row, .feature-row-reverse { grid-template-columns: 1fr; gap: 26px; }
  .feature-row-reverse .feature-copy, .feature-row-reverse .feature-media { grid-column: 1; grid-row: auto; }
  .feature-copy p { max-width: 640px; }
  .feature-row { margin-bottom: 85px; }
  .agent-media { margin-top: 30px; }
  .download-actions { max-width: 430px; }
  .guide-layout { grid-template-columns: 180px minmax(0,1fr); gap: 35px; }
}
@media (max-width: 680px) {
  html { scroll-behavior: auto; }
  .container { width: calc(100% - 36px); }
  .header-inner { min-height: 0; padding: 13px 0 0; flex-wrap: wrap; gap: 12px; }
  .brand { font-size: 15px; }
  .brand img { width: 34px; height: 34px; }
  .header-download { margin-left: auto; padding: 9px 10px; font-size: 10px; gap: 7px; }
  .main-nav { order: 3; width: 100%; justify-content: flex-start; gap: 25px; overflow-x: auto; padding: 10px 0 14px; margin-left: 0; scrollbar-width: none; }
  .main-nav::-webkit-scrollbar { display: none; }
  .main-nav a { font-size: 12px; }
  .hero { padding: 64px 0 68px; }
  .hero-product-name { font-size: clamp(26px,5vw,35px); }
  .hero h1 em { font-size: clamp(42px,8.5vw,61px); }
  .guide-hero h1 { font-size: clamp(39px,10.4vw,61px); }
  .hero-lead { font-size: 15px; line-height: 1.86; margin-top: 26px; }
  .hero-actions, .guide-hero-links { gap: 16px 22px; }
  .hero-visual { margin-top: 32px; }
  .section-pad { padding: 78px 0; }
  .section-heading { margin-bottom: 36px; }
  .section-heading h2, .demo-copy h2, .agent-copy h2, .download-grid h2 { font-size: clamp(32px,8vw,43px); }
  .workflow-track { grid-template-columns: 1fr; }
  .workflow-step, .workflow-step:not(:first-child) { min-height: 0; padding: 25px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .workflow-step:last-child { border-bottom: 0; }
  .workflow-step h3 { margin-bottom: 8px; font-size: 19px; }
  .workflow-step p { max-width: none; }
  .feature-heading { margin-bottom: 50px; }
  .feature-row { margin-bottom: 72px; }
  .feature-copy h3 { font-size: 33px; }
  .feature-media, .agent-media { padding: 6px; }
  .download-grid { gap: 25px; }
  .footer-inner { display: block; }
  .footer-inner nav { justify-content: flex-start; margin-top: 28px; }
  .footer-inner small { display: block; margin-top: 35px; }
  .guide-hero { padding: 66px 0 73px; }
  .guide-layout { display: block; padding-top: 50px; }
  .guide-sidebar { margin-bottom: 70px; }
  .guide-sidebar-inner { position: static; }
  .guide-sidebar nav { display: grid; grid-template-columns: repeat(2,1fr); gap: 4px 13px; }
  .guide-sidebar nav a { padding: 9px 12px; border-left: 2px solid var(--red); margin-left: 0; background: #fff; }
  .sidebar-help { margin-top: 18px; padding-top: 15px; }
  .guide-section { margin-bottom: 82px; scroll-margin-top: 135px; }
  .guide-section-head h2 { font-size: 38px; }
  .prep-grid { grid-template-columns: 1fr; }
  .guide-steps li { padding-left: 38px; }
  .step-content h3 { font-size: 17px; }
  .guide-end-inner { display: block; }
  .guide-end-inner > div:last-child { margin-top: 28px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}
@supports (transition-timing-function: linear(0, 1)) {
  .button, .header-download { transition-timing-function: linear(0, .18 12%, .63 30%, .96 48%, 1.025 66%, 1 100%), ease, ease, ease; }
}
@media (prefers-reduced-transparency: reduce) {
  .site-header { background: var(--paper); backdrop-filter: none; }
}