:root {
  --ink: #121212;
  --paper: #f7f7f3;
  --white: #ffffff;
  --line: #d9d9d2;
  --muted: #676762;
  --acid: #f0ff57;
  --blue: #2457ff;
  --coral: #ff6a52;
  --max: 1320px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif; }
body, button, input { letter-spacing: 0; }
img { display: block; width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button { color: inherit; }

.site-header { position: sticky; top: 0; z-index: 50; height: 76px; padding: 0 max(28px, calc((100vw - var(--max)) / 2)); display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 32px; border-bottom: 1px solid rgba(18,18,18,.12); background: rgba(247,247,243,.9); backdrop-filter: blur(18px); }
.brand { display: inline-flex; align-items: center; gap: 10px; width: max-content; font-size: 21px; font-weight: 700; }
.brand b { font-weight: 400; }
.brand-mark { display: grid; place-items: center; width: 34px; height: 34px; background: var(--ink); color: var(--acid); font: 800 19px/1 Georgia, serif; transform: rotate(-5deg); }
.site-header nav { display: flex; gap: 34px; font-size: 14px; }
.site-header nav a, footer nav a { position: relative; }
.site-header nav a::after, footer nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -6px; height: 1px; background: currentColor; transition: right .2s ease; }
.site-header nav a:hover::after, footer nav a:hover::after { right: 0; }
.site-header > .button { justify-self: end; }

.button { min-height: 52px; padding: 0 24px; display: inline-flex; align-items: center; justify-content: center; gap: 18px; border: 1px solid var(--ink); background: var(--ink); color: var(--white); font-weight: 700; transition: transform .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); background: #2c2c2c; }
.button span { font-size: 20px; }
.button-small { min-height: 42px; padding: 0 18px; font-size: 14px; }
.button-light { background: var(--acid); color: var(--ink); border-color: var(--acid); }
.button-light:hover { background: var(--white); }
.eyebrow { margin: 0 0 22px; display: flex; align-items: center; justify-content: center; gap: 10px; font-size: 12px; font-weight: 800; }
.eyebrow > span { width: 28px; height: 2px; background: var(--blue); }
.eyebrow.light { color: var(--acid); }
.eyebrow.light > span { background: var(--acid); }

.hero { position: relative; min-height: auto; padding: 76px max(28px, calc((100vw - var(--max)) / 2)) 54px; display: grid; grid-template-columns: minmax(0, 860px); justify-content: center; align-items: center; overflow: hidden; text-align: center; }
.hero::before { content: ""; position: absolute; width: 270px; height: 270px; right: -130px; top: 80px; border: 1px solid var(--line); border-radius: 50%; }
.hero-copy { width: 100%; margin-inline: auto; text-align: center; }
.hero h1 { margin: 0 auto; max-width: 680px; font-size: 72px; line-height: 1.08; font-weight: 730; text-align: center; }
.hero h1 strong { position: relative; font-weight: inherit; z-index: 0; }
.hero h1 strong::after { content: ""; position: absolute; z-index: -1; left: -4px; right: -6px; bottom: 6px; height: 22px; background: var(--acid); transform: rotate(-1deg); }
.hero-lead { margin: 28px auto 34px; max-width: 680px; color: var(--muted); font-size: 18px; line-height: 1.8; }
.prompt-box { width: min(100%, 820px); margin: 0 auto; padding: 28px; border: 1px solid var(--ink); background: var(--white); box-shadow: 10px 10px 0 var(--ink); text-align: left; }
.prompt-box label { display: block; margin-bottom: 12px; color: var(--muted); font-size: 13px; }
.prompt-row { display: grid; grid-template-columns: 1fr auto; gap: 10px; }
.prompt-row input { min-width: 0; height: 68px; padding: 0 20px; border: 1px solid var(--line); border-radius: 0; outline: none; background: var(--paper); font-size: 18px; }
.prompt-row input:focus { border-color: var(--blue); box-shadow: inset 0 0 0 1px var(--blue); }
.prompt-row button { width: 150px; border: 0; background: var(--blue); color: var(--white); font-size: 18px; font-weight: 700; cursor: pointer; }
.prompt-row button:hover { background: #1743d8; }
.prompt-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.prompt-chips button { padding: 6px 10px; border: 1px solid var(--line); background: transparent; color: var(--muted); font-size: 12px; cursor: pointer; }
.prompt-chips button:hover { color: var(--ink); border-color: var(--ink); }
.hero-meta { display: flex; justify-content: center; gap: 38px; margin-top: 32px; font-size: 12px; color: var(--muted); }
.hero-meta span { display: flex; align-items: center; gap: 7px; }
.hero-meta b { color: var(--blue); font-size: 10px; }

.hero-stage { display: none; }
.hero-stage::before { content: ""; position: absolute; inset: 5% 0 4% 7%; z-index: -1; background: var(--acid); transform: rotate(3deg); }
.stage-toolbar { height: 36px; padding: 0 13px; display: flex; align-items: center; gap: 6px; background: var(--ink); color: #a8a8a3; font-size: 9px; }
.stage-toolbar span { width: 7px; height: 7px; border-radius: 50%; background: #686864; }
.stage-toolbar b { margin-left: auto; font-weight: 500; }
.stage-main { margin: 0; border: 8px solid var(--ink); border-top: 0; background: var(--ink); box-shadow: 0 24px 54px rgba(0,0,0,.23); }
.stage-float { position: absolute; margin: 0; width: 34%; border: 5px solid var(--white); box-shadow: 0 20px 45px rgba(0,0,0,.22); }
.stage-float-one { left: -1%; bottom: 4%; transform: rotate(-6deg); }
.stage-float-two { right: -2%; top: 1%; transform: rotate(5deg); }
.scroll-hint { position: absolute; left: 50%; bottom: 22px; transform: translateX(-50%); display: flex; gap: 12px; align-items: center; font-size: 11px; font-weight: 700; writing-mode: vertical-rl; }
.scroll-hint span { font-size: 18px; }

.trust-strip { padding: 20px max(28px, calc((100vw - var(--max)) / 2)); display: flex; justify-content: space-between; gap: 40px; border-block: 1px solid var(--ink); background: var(--white); font-size: 12px; }
.trust-strip p { margin: 0; font-weight: 800; }
.trust-strip div { display: flex; gap: 38px; color: var(--muted); }
.trust-strip div span::before { content: "✓"; margin-right: 8px; color: var(--blue); font-weight: 800; }

.section { padding: 120px max(28px, calc((100vw - var(--max)) / 2)); }
.showcase { padding-top: 64px; }
.section-head { display: grid; grid-template-columns: 1fr 1fr; align-items: end; gap: 60px; margin-bottom: 54px; }
.section-head h2, .audience h2, .faq h2 { margin: 0; font-size: 58px; line-height: 1.08; }
.section-intro { justify-self: end; max-width: 430px; }
.section-intro p, .section-head.compact > p { margin: 0; color: var(--muted); font-size: 16px; line-height: 1.8; }
.gallery-controls { display: flex; justify-content: flex-end; gap: 8px; margin-top: 24px; }
.gallery-controls button { width: 44px; height: 44px; border: 1px solid var(--ink); background: transparent; font-size: 19px; cursor: pointer; }
.gallery-controls button:hover { background: var(--ink); color: var(--white); }
.gallery { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(390px, 42%); gap: 22px; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none; }
.gallery::-webkit-scrollbar { display: none; }
.work-card { scroll-snap-align: start; border: 1px solid var(--ink); background: var(--white); }
.work-card figure { margin: 0; aspect-ratio: 16/9; overflow: hidden; background: #ddd; }
.work-card img { height: 100%; object-fit: cover; transition: transform .45s ease; }
.work-card:hover img { transform: scale(1.025); }
.work-card > div { padding: 24px; display: grid; grid-template-columns: auto 1fr; column-gap: 18px; align-items: baseline; }
.work-card span { grid-row: 1/3; min-width: 70px; color: var(--blue); font-size: 11px; font-weight: 800; }
.work-card h3 { margin: 0; font-size: 23px; }
.work-card p { margin: 8px 0 0; color: var(--muted); font-size: 13px; }
.showcase-action { margin-top: 34px; display: flex; justify-content: flex-end; }
.text-link { padding-bottom: 7px; border-bottom: 1px solid var(--ink); font-weight: 700; }
.text-link span { margin-left: 12px; }

.workflow { padding: 120px max(28px, calc((100vw - var(--max)) / 2)); background: var(--ink); color: var(--white); }
.workflow-inner { display: grid; grid-template-columns: .82fr 1.18fr; gap: 110px; }
.workflow-copy h2 { margin: 0; font-size: 58px; line-height: 1.08; }
.workflow-copy > p:not(.eyebrow) { margin: 28px 0 34px; max-width: 430px; color: #b3b3ad; line-height: 1.8; }
.workflow-list { margin: 0; padding: 0; list-style: none; }
.workflow-list li { min-height: 150px; padding: 30px 0; display: grid; grid-template-columns: 72px 1fr; border-top: 1px solid #44443f; }
.workflow-list li:last-child { border-bottom: 1px solid #44443f; }
.workflow-list b { color: var(--acid); font-size: 12px; }
.workflow-list h3 { margin: 0 0 12px; font-size: 25px; }
.workflow-list p { margin: 0; max-width: 480px; color: #a9a9a4; line-height: 1.7; }

.section-head.compact { grid-template-columns: 1.3fr .7fr; }
.section-head.compact > p { max-width: 420px; justify-self: end; }
.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.feature { position: relative; min-height: 360px; padding: 28px; border: 1px solid var(--ink); background: var(--white); overflow: hidden; display: flex; flex-direction: column; justify-content: space-between; }
.feature-wide { grid-column: span 2; min-height: 310px; }
.feature-number { font-size: 11px; font-weight: 800; color: var(--blue); }
.feature h3 { margin: 0 0 12px; font-size: 28px; }
.feature p { margin: 0; max-width: 590px; color: var(--muted); line-height: 1.7; }
.mini-deck { position: absolute; right: 8%; top: 50%; transform: translateY(-42%); width: 38%; aspect-ratio: 16/9; border: 7px solid var(--ink); background: var(--acid); box-shadow: -24px 24px 0 #d8d8d1; }
.mini-deck span { position: absolute; left: 9%; height: 6%; background: var(--ink); }
.mini-deck span:nth-child(1) { top: 17%; width: 48%; height: 11%; }
.mini-deck span:nth-child(2) { top: 38%; width: 75%; }
.mini-deck span:nth-child(3) { top: 51%; width: 62%; }
.mini-deck span:nth-child(4) { left: auto; right: 9%; top: 60%; width: 25%; height: 27%; background: var(--blue); }
.type-lines { display: grid; gap: 12px; }
.type-lines i { height: 10px; background: var(--ink); }
.type-lines i:nth-child(1) { width: 74%; }
.type-lines i:nth-child(2) { width: 92%; }
.type-lines i:nth-child(3) { width: 47%; background: var(--blue); }
.feature.accent { background: var(--acid); }
.palette { display: flex; height: 62px; }
.palette i { flex: 1; background: var(--ink); }
.palette i:nth-child(2) { background: var(--coral); }
.palette i:nth-child(3) { background: var(--blue); }
.palette i:nth-child(4) { background: var(--white); }
.feature.dark { background: var(--ink); color: var(--white); }
.feature.dark p { color: #b3b3ad; }
.feature.dark .feature-number { color: var(--acid); }
.export-badge { position: absolute; right: 8%; top: 50%; transform: translateY(-50%) rotate(3deg); padding: 42px 34px; border: 1px solid var(--acid); color: var(--acid); font-size: 42px; font-weight: 800; }
.export-badge b { display: block; margin-top: 14px; font-size: 22px; text-align: center; }

.audience { display: grid; grid-template-columns: .9fr 1.1fr; gap: 90px; border-top: 1px solid var(--line); }
.audience-list { border-top: 1px solid var(--ink); }
.audience-list > div { padding: 23px 0; display: grid; grid-template-columns: 58px 1fr 1fr; align-items: center; gap: 16px; border-bottom: 1px solid var(--ink); }
.audience-list b { color: var(--blue); font-size: 11px; }
.audience-list span { font-size: 19px; font-weight: 700; }
.audience-list p { margin: 0; color: var(--muted); font-size: 13px; }

.faq { display: grid; grid-template-columns: .75fr 1.25fr; gap: 100px; background: var(--white); }
.faq-title { position: sticky; top: 120px; align-self: start; }
.faq-list details { border-top: 1px solid var(--ink); }
.faq-list details:last-child { border-bottom: 1px solid var(--ink); }
.faq-list summary { min-height: 84px; display: flex; align-items: center; justify-content: space-between; gap: 20px; cursor: pointer; list-style: none; font-size: 18px; font-weight: 700; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary span { font-size: 24px; font-weight: 400; transition: transform .2s ease; }
.faq-list details[open] summary span { transform: rotate(45deg); }
.faq-list details p { margin: -4px 50px 28px 0; color: var(--muted); line-height: 1.75; }

.closing { min-height: 560px; padding: 110px max(28px, calc((100vw - var(--max)) / 2)); display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; background: var(--blue); color: var(--white); }
.closing h2 { margin: 0; font-size: 72px; line-height: 1.05; }
.closing > p:not(.eyebrow) { margin: 25px 0 34px; color: #d8e0ff; font-size: 17px; }

footer { padding: 50px max(28px, calc((100vw - var(--max)) / 2)); display: grid; grid-template-columns: 1fr auto auto; align-items: center; gap: 44px; background: var(--ink); color: var(--white); }
.footer-brand { grid-row: 1/3; }
.footer-brand .brand-mark { background: var(--acid); color: var(--ink); }
footer p, footer small { margin: 0; color: #979791; font-size: 12px; }
footer nav { display: flex; gap: 24px; font-size: 13px; }
footer small { grid-column: 3; text-align: right; }

@media (max-width: 1050px) {
  .site-header { grid-template-columns: 1fr auto; }
  .site-header nav { display: none; }
  .hero { min-height: auto; grid-template-columns: 1fr; padding-top: 68px; }
  .hero-copy { max-width: 720px; }
  .hero-stage { width: min(820px, 96%); margin: 10px auto 20px; }
  .scroll-hint { display: none; }
  .workflow-inner, .audience, .faq { grid-template-columns: 1fr; gap: 60px; }
  .faq-title { position: static; }
}

@media (max-width: 760px) {
  .site-header { height: 64px; padding-inline: 18px; }
  .brand { font-size: 18px; }
  .brand-mark { width: 31px; height: 31px; }
  .button-small { min-height: 38px; padding-inline: 13px; }
  .button-small span { display: none; }
  .hero { padding: 55px 18px 44px; gap: 45px; }
  .hero h1 { font-size: 46px; }
  .hero h1 strong::after { height: 15px; }
  .hero-lead { font-size: 15px; }
  .prompt-box { box-shadow: 5px 5px 0 var(--ink); }
  .prompt-row { grid-template-columns: 1fr; }
  .prompt-row button { width: 100%; height: 48px; }
  .hero-meta { gap: 12px; flex-wrap: wrap; }
  .hero-stage { padding: 25px 12px 48px; width: 100%; }
  .stage-float { width: 37%; }
  .trust-strip { padding: 18px; display: block; overflow: hidden; }
  .trust-strip p { margin-bottom: 14px; }
  .trust-strip div { width: max-content; gap: 22px; }
  .section, .workflow { padding: 82px 18px; }
  .showcase { padding-top: 48px; }
  .section-head, .section-head.compact { grid-template-columns: 1fr; gap: 28px; }
  .section-head h2, .audience h2, .faq h2, .workflow-copy h2 { font-size: 40px; }
  .section-intro, .section-head.compact > p { justify-self: start; }
  .gallery-controls { justify-content: flex-start; }
  .gallery { grid-auto-columns: 86%; gap: 13px; }
  .work-card > div { padding: 18px; grid-template-columns: 1fr; }
  .work-card span { grid-row: auto; margin-bottom: 8px; }
  .work-card h3 { font-size: 20px; }
  .workflow-inner { gap: 58px; }
  .workflow-list li { grid-template-columns: 48px 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature, .feature-wide { grid-column: span 1; min-height: 310px; }
  .feature h3 { font-size: 23px; }
  .mini-deck { position: relative; right: auto; top: auto; transform: none; width: 82%; margin: 40px auto 5px; }
  .export-badge { right: 24px; top: auto; bottom: 26px; transform: rotate(2deg); padding: 20px; font-size: 28px; }
  .feature.dark { padding-bottom: 145px; }
  .audience-list > div { grid-template-columns: 42px 1fr; }
  .audience-list p { grid-column: 2; }
  .faq-list summary { min-height: 76px; font-size: 16px; }
  .closing { min-height: 480px; padding: 90px 18px; }
  .closing h2 { font-size: 47px; }
  footer { padding: 42px 18px; grid-template-columns: 1fr; gap: 22px; }
  .footer-brand { grid-row: auto; }
  footer small { grid-column: auto; text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}