:root {
  --ink: #161817;
  --muted: #666b68;
  --paper: #f5f2ea;
  --paper-2: #ebe7dd;
  --white: #fffefb;
  --blue: #156fd1;
  --blue-dark: #0b4f9d;
  --line: rgba(22, 24, 23, .16);
  --soft-line: rgba(22, 24, 23, .09);
  --max: 1180px;
  --radius: 22px;
  --shadow: 0 24px 70px rgba(25, 29, 27, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: Inter, "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif; line-height: 1.65; }
body.nav-open { overflow: hidden; }
body::before { content: ""; position: fixed; inset: 0; z-index: -1; opacity: .35; pointer-events: none; background-image: linear-gradient(var(--soft-line) 1px, transparent 1px), linear-gradient(90deg, var(--soft-line) 1px, transparent 1px); background-size: 32px 32px; mask-image: linear-gradient(to bottom, #000, transparent 70%); }
img { max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid #f3a712; outline-offset: 4px; }
.skip-link { position: fixed; left: 16px; top: 10px; z-index: 100; padding: 9px 14px; color: #fff; background: var(--ink); border-radius: 8px; transform: translateY(-150%); }
.skip-link:focus { transform: none; }
.shell { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.eyebrow { margin: 0 0 16px; color: var(--blue-dark); font-size: 12px; font-weight: 750; letter-spacing: .14em; text-transform: uppercase; }
.muted { color: var(--muted); }
.section { padding: 112px 0; }
.section-tight { padding: 72px 0; }
.section-dark { color: #fff; background: var(--ink); }
.section-blue { color: #fff; background: var(--blue-dark); }
.section-head { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(260px, .75fr); align-items: end; gap: 48px; margin-bottom: 48px; }
.section-head h2, .page-hero h1, .hero h1 { margin: 0; font-family: Georgia, "Noto Serif SC", serif; font-weight: 500; letter-spacing: -.045em; line-height: 1.06; }
.section-head h2 { font-size: clamp(42px, 5vw, 72px); }
.section-head p { margin: 0; color: var(--muted); font-size: 17px; }
.section-dark .section-head p, .section-blue .section-head p { color: rgba(255,255,255,.72); }
.lead { max-width: 760px; color: var(--muted); font-size: clamp(18px, 2vw, 24px); }

.site-header { position: sticky; top: 0; z-index: 40; border-bottom: 1px solid var(--line); background: rgba(245, 242, 234, .94); backdrop-filter: blur(16px); }
.nav-wrap { min-height: 72px; display: flex; align-items: center; gap: 32px; }
.brand { flex: 0 0 auto; display: inline-flex; align-items: center; }
.brand img { width: 156px; max-height: 54px; object-fit: contain; }
.main-nav { margin-left: auto; display: flex; align-items: center; gap: 24px; }
.main-nav a { position: relative; padding: 24px 0 22px; color: #393d3a; font-size: 14px; }
.main-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 17px; height: 2px; background: var(--blue); transition: right .2s; }
.main-nav a:hover::after, .main-nav a[aria-current="page"]::after { right: 0; }
.nav-cta, .button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; gap: 18px; padding: 11px 19px; border: 1px solid var(--ink); border-radius: 999px; color: #fff; background: var(--ink); font-size: 14px; font-weight: 700; transition: transform .2s, background .2s, color .2s; }
.nav-cta:hover, .button:hover { transform: translateY(-2px); background: var(--blue-dark); border-color: var(--blue-dark); }
.button.secondary { color: var(--ink); background: transparent; }
.button.secondary:hover { color: #fff; background: var(--ink); border-color: var(--ink); }
.button.light { color: var(--ink); background: #fff; border-color: #fff; }
.button.light:hover { color: #fff; background: transparent; }
.nav-toggle { display: none; margin-left: auto; width: 46px; height: 46px; border: 1px solid var(--line); border-radius: 50%; background: transparent; cursor: pointer; }

.hero { min-height: calc(100svh - 72px); display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(420px, .95fr); align-items: center; gap: 50px; padding: 74px 0 48px; overflow: hidden; }
.hero-copy { position: relative; z-index: 2; }
.hero h1 { max-width: 760px; font-size: clamp(64px, 8.4vw, 126px); }
.hero h1 .accent, .page-hero h1 .accent { color: var(--blue); }
.hero .definition { max-width: 600px; margin: 28px 0 0; color: #3d423f; font-size: clamp(18px, 2vw, 23px); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.proof-line { display: flex; flex-wrap: wrap; gap: 10px 24px; margin: 30px 0 0; padding: 18px 0 0; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.proof-line span::before { content: ""; display: inline-block; width: 7px; height: 7px; margin-right: 9px; border-radius: 50%; background: var(--blue); }
.hero-visual { position: relative; min-height: 590px; display: grid; place-items: center; }
.hero-visual::before { content: ""; position: absolute; width: 78%; aspect-ratio: 1; border: 1px solid rgba(21, 111, 209, .28); border-radius: 50%; box-shadow: 0 0 0 38px rgba(21,111,209,.05), 0 0 0 76px rgba(21,111,209,.03); }
.hero-visual img { position: relative; z-index: 2; width: 116%; max-width: none; filter: drop-shadow(0 35px 35px rgba(0,0,0,.16)); }
.visual-label { position: absolute; z-index: 3; padding: 8px 12px; border: 1px solid var(--line); border-radius: 999px; background: rgba(255,254,251,.92); font-size: 12px; box-shadow: 0 8px 24px rgba(0,0,0,.08); }
.visual-label.one { left: 2%; top: 27%; }
.visual-label.two { right: 0; top: 47%; }
.visual-label.three { left: 14%; bottom: 18%; }

.problem-grid, .card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.problem-card, .card { padding: 30px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255,254,251,.66); }
.problem-card .num, .card .num { display: block; margin-bottom: 42px; color: var(--blue); font-size: 12px; font-weight: 800; }
.problem-card h3, .card h3 { margin: 0 0 10px; font-size: 22px; }
.problem-card p, .card p { margin: 0; color: var(--muted); }
.section-dark .problem-card, .section-dark .card { border-color: rgba(255,255,255,.18); background: rgba(255,255,255,.04); }
.section-dark .problem-card p, .section-dark .card p { color: rgba(255,255,255,.68); }

.flow { display: grid; grid-template-columns: repeat(6, 1fr); gap: 10px; margin-top: 42px; }
.flow-step { position: relative; min-height: 146px; padding: 20px; border: 1px solid rgba(255,255,255,.22); border-radius: 18px; background: rgba(255,255,255,.05); }
.flow-step:not(:last-child)::after { content: "→"; position: absolute; right: -10px; top: 50%; z-index: 2; width: 20px; text-align: center; color: #fff; transform: translateY(-50%); }
.flow-step span { color: rgba(255,255,255,.5); font-size: 11px; }
.flow-step b { display: block; margin-top: 42px; font-size: 16px; }

.tech-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.tech-card { min-height: 360px; padding: 30px; display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); overflow: hidden; }
.tech-card .tech-mark { position: relative; min-height: 150px; margin: -10px -10px 28px; border-radius: 14px; background: var(--paper-2); overflow: hidden; }
.tech-card .tech-mark::before, .tech-card .tech-mark::after { content: ""; position: absolute; border: 1px solid rgba(21,111,209,.45); }
.tech-card .tech-mark.id::before { width: 88px; height: 52px; left: 50%; top: 50%; border-radius: 10px; transform: translate(-50%,-50%); box-shadow: 12px 12px 0 rgba(21,111,209,.12); }
.tech-card .tech-mark.id::after { width: 8px; height: 8px; left: calc(50% - 31px); top: calc(50% - 4px); border-radius: 50%; background: var(--blue); }
.tech-card .tech-mark.position { background-image: linear-gradient(rgba(21,111,209,.22) 1px, transparent 1px), linear-gradient(90deg, rgba(21,111,209,.22) 1px, transparent 1px); background-size: 22px 22px; }
.tech-card .tech-mark.position::before { width: 14px; height: 14px; left: 62%; top: 39%; border: 4px solid var(--blue); border-radius: 50%; background: #fff; }
.tech-card .tech-mark.position::after { display: none; }
.tech-card .tech-mark.twin::before { width: 82px; height: 105px; left: 26%; top: 20px; border-radius: 6px; background: #fff; box-shadow: 78px 18px 0 -1px var(--paper), 78px 18px 0 0 var(--blue); }
.tech-card .tech-mark.twin::after { left: 48%; top: 71px; width: 64px; border-style: dashed; }
.tech-card h3 { margin: 0 0 8px; font-size: 24px; }
.tech-card p { margin: 0; color: var(--muted); }

.use-cases { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); }
.use-case { min-height: 210px; padding: 34px 34px 34px 0; border-bottom: 1px solid var(--line); }
.use-case:nth-child(odd) { border-right: 1px solid var(--line); }
.use-case:nth-child(even) { padding-left: 34px; }
.use-case small { color: var(--blue-dark); font-weight: 800; }
.use-case h3 { margin: 38px 0 8px; font-family: Georgia, "Noto Serif SC", serif; font-size: 30px; font-weight: 500; }
.use-case p { margin: 0; color: var(--muted); }

.proof-band { display: grid; grid-template-columns: .8fr 1.2fr; align-items: center; gap: 54px; padding: 48px; border-radius: 28px; background: var(--white); box-shadow: var(--shadow); }
.proof-band img { width: 100%; max-height: 390px; object-fit: contain; }
.proof-band h2 { margin: 0 0 18px; font-family: Georgia, "Noto Serif SC", serif; font-size: clamp(40px, 5vw, 66px); line-height: 1.08; font-weight: 500; }

.steps { counter-reset: steps; display: grid; gap: 0; border-top: 1px solid var(--line); }
.step { counter-increment: steps; display: grid; grid-template-columns: 100px 1fr minmax(200px, .75fr); gap: 30px; padding: 32px 0; border-bottom: 1px solid var(--line); align-items: start; }
.step::before { content: "0" counter(steps); color: var(--blue); font-weight: 800; }
.step h3 { margin: 0; font-size: 24px; }
.step p { margin: 0; color: var(--muted); }

.faq-list { display: grid; gap: 10px; }
.faq-list details { border: 1px solid var(--line); border-radius: 16px; background: rgba(255,254,251,.7); }
.faq-list summary { position: relative; cursor: pointer; list-style: none; padding: 22px 64px 22px 24px; font-size: 18px; font-weight: 700; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 24px; top: 50%; color: var(--blue); font-size: 28px; font-weight: 400; transform: translateY(-50%); }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { max-width: 820px; margin: 0; padding: 0 64px 24px 24px; color: var(--muted); }
.faq-categories { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 30px; }
.faq-categories a { padding: 7px 12px; border: 1px solid var(--line); border-radius: 999px; font-size: 13px; }

.cta-section { padding: 78px 0; color: #fff; background: var(--blue-dark); }
.cta-grid { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 40px; }
.cta-grid h2 { margin: 0; font-family: Georgia, "Noto Serif SC", serif; font-size: clamp(40px, 5.2vw, 72px); line-height: 1.04; font-weight: 500; }
.cta-grid p { margin: 12px 0 0; color: rgba(255,255,255,.75); }
.cta-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 10px; }

.site-footer { padding: 62px 0 26px; color: #fff; background: #111311; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 48px; }
.footer-brand img { width: 170px; filter: brightness(0) invert(1); }
.footer-brand p { max-width: 280px; color: rgba(255,255,255,.62); }
.footer-col h2 { margin: 0 0 18px; font-size: 13px; }
.footer-col a { display: block; margin: 10px 0; color: rgba(255,255,255,.63); font-size: 13px; }
.footer-col a:hover { color: #fff; }
.footer-bottom { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 48px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.16); color: rgba(255,255,255,.5); font-size: 11px; }
.footer-bottom a:last-child { margin-left: auto; }

.page-hero { padding: 98px 0 76px; border-bottom: 1px solid var(--line); }
.breadcrumb { display: flex; gap: 8px; margin-bottom: 40px; color: var(--muted); font-size: 13px; }
.page-hero-grid { display: grid; grid-template-columns: 1.2fr .8fr; align-items: end; gap: 60px; }
.page-hero h1 { font-size: clamp(58px, 7.5vw, 105px); }
.page-hero p { margin: 0; color: var(--muted); font-size: 19px; }
.status-note { margin-top: 28px; padding: 16px 18px; border-left: 3px solid var(--blue); background: rgba(21,111,209,.07); color: #3d4541; font-size: 14px; }
.product-hero-shot { padding: 38px; border-radius: 28px; background: var(--white); box-shadow: var(--shadow); }
.feature-layout { display: grid; grid-template-columns: .85fr 1.15fr; gap: 64px; align-items: center; }
.feature-layout.reverse { grid-template-columns: 1.15fr .85fr; }
.feature-copy h2 { margin: 0 0 18px; font-family: Georgia, "Noto Serif SC", serif; font-size: clamp(38px, 4.8vw, 62px); line-height: 1.08; font-weight: 500; }
.feature-copy p { color: var(--muted); }
.feature-copy ul { padding-left: 20px; color: var(--muted); }
.app-frame { min-height: 520px; display: grid; place-items: center; padding: 24px; border-radius: 26px; background: #dfeaf3; }
.app-frame img { max-height: 470px; object-fit: contain; filter: drop-shadow(0 24px 28px rgba(0,0,0,.18)); }

.filter-bar { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 34px; }
.filter-bar button { padding: 8px 14px; border: 1px solid var(--line); border-radius: 999px; background: transparent; cursor: pointer; }
.filter-bar button[aria-pressed="true"] { color: #fff; background: var(--ink); }
.content-card[hidden] { display: none; }
.tag { display: inline-flex; padding: 5px 9px; border-radius: 999px; color: var(--blue-dark); background: rgba(21,111,209,.09); font-size: 11px; font-weight: 750; }
.card a.text-link { display: inline-flex; margin-top: 22px; color: var(--blue-dark); font-weight: 750; }
.placeholder { border-style: dashed; }

.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.contact-card { padding: 32px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); }
.contact-card h3 { margin: 0 0 12px; font-size: 24px; }
.contact-card p { color: var(--muted); }
.contact-card a { color: var(--blue-dark); font-weight: 700; }

.newsletter { max-width: 680px; }
.newsletter-row { display: flex; gap: 10px; margin-top: 18px; }
.newsletter input { flex: 1; min-width: 0; min-height: 48px; padding: 10px 14px; border: 1px solid rgba(255,255,255,.4); border-radius: 999px; color: #fff; background: rgba(255,255,255,.08); }
.newsletter input::placeholder { color: rgba(255,255,255,.58); }
.newsletter small { display: block; margin-top: 10px; color: rgba(255,255,255,.65); }
.form-status { min-height: 1.5em; margin-top: 10px; color: #fff; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .65s ease, transform .65s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .main-nav { position: fixed; inset: 72px 0 auto; display: none; margin: 0; padding: 20px; flex-direction: column; align-items: stretch; gap: 0; border-bottom: 1px solid var(--line); background: var(--paper); box-shadow: 0 18px 30px rgba(0,0,0,.09); }
  .main-nav.is-open { display: flex; }
  .main-nav a { padding: 14px 4px; border-bottom: 1px solid var(--soft-line); font-size: 16px; }
  .main-nav a::after { display: none; }
  .nav-cta { display: none; }
  .nav-toggle { display: inline-grid; place-items: center; }
  .hero { grid-template-columns: 1fr; padding-top: 64px; }
  .hero-visual { min-height: 460px; }
  .section-head, .page-hero-grid, .feature-layout, .feature-layout.reverse { grid-template-columns: 1fr; gap: 28px; }
  .problem-grid, .card-grid, .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .flow { grid-template-columns: repeat(3, 1fr); }
  .proof-band { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; }
  .footer-brand { grid-column: 1/-1; }
}

@media (max-width: 680px) {
  .shell { width: min(calc(100% - 28px), var(--max)); }
  .section { padding: 78px 0; }
  .section-tight { padding: 54px 0; }
  .brand img { width: 136px; }
  .hero { min-height: auto; gap: 24px; padding: 56px 0 28px; }
  .hero h1 { font-size: clamp(52px, 18vw, 78px); }
  .hero-visual { min-height: 330px; }
  .hero-visual img { width: 112%; }
  .visual-label { font-size: 10px; }
  .problem-grid, .card-grid, .tech-grid, .use-cases, .contact-grid { grid-template-columns: 1fr; }
  .use-case:nth-child(odd) { border-right: 0; }
  .use-case:nth-child(even) { padding-left: 0; }
  .flow { grid-template-columns: 1fr; }
  .flow-step { min-height: 108px; }
  .flow-step b { margin-top: 22px; }
  .flow-step:not(:last-child)::after { content: "↓"; left: 50%; right: auto; top: auto; bottom: -16px; transform: translateX(-50%); }
  .section-head { margin-bottom: 34px; }
  .section-head h2 { font-size: 42px; }
  .proof-band { padding: 26px; }
  .step { grid-template-columns: 48px 1fr; gap: 14px; }
  .step p { grid-column: 2; }
  .cta-grid { grid-template-columns: 1fr; }
  .cta-actions { justify-content: flex-start; }
  .page-hero { padding: 68px 0 56px; }
  .page-hero h1 { font-size: 52px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 34px 20px; }
  .footer-brand { grid-column: 1/-1; }
  .footer-bottom a:last-child { margin-left: 0; }
  .newsletter-row { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

/* Formal-site alignment layer
   Visual baseline: the currently deployed pingink.com (blue/white/black VI).
   This stylesheet is used only by the new additive pages; the deployed
   home/app/about templates retain their original inline design unchanged. */
:root {
  --ink: #0b0d11;
  --muted: #737b84;
  --paper: #ffffff;
  --paper-2: #eaf5ff;
  --white: #ffffff;
  --blue: #2499e8;
  --blue-dark: #0a2a43;
  --line: rgba(10, 42, 67, .15);
  --soft-line: rgba(10, 42, 67, .08);
  --max: 1320px;
  --radius: 18px;
  --shadow: 0 28px 70px rgba(21, 77, 118, .13);
}
body {
  color: var(--ink);
  background: #fff;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
}
body::before { display: none; }
.shell { width: min(calc(100% - 96px), var(--max)); }
.site-header {
  min-height: 76px;
  border-bottom: 1px solid #e4e7ea;
  background: rgba(255, 255, 255, .96);
  box-shadow: none;
}
.nav-wrap { min-height: 76px; }
.brand img { width: 156px; max-height: 60px; }
.main-nav { gap: 30px; }
.main-nav a { padding-block: 27px 25px; color: #111; font-size: 13px; }
.main-nav a::after { bottom: 18px; background: var(--blue); }
.nav-cta, .button {
  min-height: 46px;
  padding: 11px 22px;
  border-color: #0d0d0d;
  color: #fff;
  background: #0d0d0d;
  font-weight: 650;
  box-shadow: none;
}
.nav-cta:hover, .button:hover { border-color: var(--blue); background: var(--blue); }
.button.secondary { color: #0d0d0d; background: #fff; }
.button.secondary:hover { color: #fff; background: #0d0d0d; }
.section { padding: 118px 0; }
.section-tight { padding: 82px 0; }
.section-head h2, .page-hero h1, .hero h1,
.feature-copy h2, .proof-band h2, .cta-grid h2, .use-case h3 {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
  font-weight: 750;
  letter-spacing: -.055em;
}
.page-hero {
  position: relative;
  overflow: hidden;
  padding: 118px 0 104px;
  border-bottom: 0;
  background:
    radial-gradient(circle at 78% 18%, rgba(36,153,232,.20), transparent 28%),
    linear-gradient(135deg, #f7fbff 0%, #e8f5ff 58%, #d9edff 100%);
}
.page-hero::before, .page-hero::after {
  content: "";
  position: absolute;
  width: 520px;
  aspect-ratio: 1;
  right: -160px;
  top: -240px;
  border: 1px solid rgba(36,153,232,.16);
  border-radius: 50%;
  animation: formalPulse 8s ease-in-out infinite;
}
.page-hero::after { width: 360px; right: 40px; top: auto; bottom: -260px; animation-delay: -3s; }
.page-hero .shell { position: relative; z-index: 1; }
.page-hero h1 { max-width: 820px; font-size: clamp(58px, 7.2vw, 108px); line-height: .98; }
.page-hero h1 .accent { color: var(--blue); }
.page-hero p { color: #536473; font-size: 18px; }
.breadcrumb { color: #627789; }
.eyebrow { color: var(--blue); }
.status-note { border-left-color: var(--blue); background: rgba(255,255,255,.65); }
.section-dark {
  position: relative;
  overflow: hidden;
  color: #fff;
  background: #0d0e10;
}
.section-dark::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: .42;
  pointer-events: none;
  background-image:
    radial-gradient(circle, rgba(255,255,255,.65) 0 1px, transparent 1.4px),
    radial-gradient(circle, rgba(36,153,232,.65) 0 1px, transparent 1.4px);
  background-position: 0 0, 33px 51px;
  background-size: 96px 96px, 143px 143px;
  mask-image: linear-gradient(to bottom, #000, transparent 92%);
  animation: formalStars 24s linear infinite;
}
.section-dark > .shell { position: relative; z-index: 1; }
.section-blue {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #168fda, #29a7ee 58%, #53c1ef);
}
.section-blue::before {
  content: "";
  position: absolute;
  width: 860px;
  aspect-ratio: 1;
  left: 50%;
  top: 50%;
  border: 2px solid rgba(255,255,255,.12);
  border-radius: 50%;
  box-shadow: 0 0 0 110px rgba(255,255,255,.035), 0 0 0 240px rgba(255,255,255,.022);
  transform: translate(-50%,-50%);
  animation: formalWater 9s ease-in-out infinite;
}
.section-blue > .shell { position: relative; z-index: 1; }
.problem-card, .card, .tech-card, .contact-card {
  border-radius: 16px;
  background: #fff;
  box-shadow: none;
}
.card-grid { gap: 18px; }
.section-dark .card, .section-dark .problem-card {
  border-color: rgba(255,255,255,.18);
  background: rgba(255,255,255,.035);
  backdrop-filter: blur(8px);
}
.product-hero-shot {
  border: 1px solid #e8eef3;
  border-radius: 20px;
  background: #f7f9fb;
  box-shadow: 0 24px 70px rgba(20,63,94,.12);
}
.app-frame { border: 1px solid #e1eaf2; border-radius: 20px; background: #f4f7f9; }
.tech-card .tech-mark { background: #eaf5ff; }
.use-cases, .steps { border-color: #dfe5ea; }
.use-case, .step { border-color: #dfe5ea; }
.faq-list details { border-color: #dfe5ea; background: #fff; }
.cta-section {
  position: relative;
  overflow: hidden;
  background: #0a2a43;
}
.cta-section::after {
  content: "";
  position: absolute;
  width: 440px;
  aspect-ratio: 1;
  right: -80px;
  top: -290px;
  border: 1px solid rgba(36,153,232,.35);
  border-radius: 50%;
  box-shadow: 0 0 0 80px rgba(36,153,232,.05);
}
.cta-grid { position: relative; z-index: 1; }
.site-footer {
  position: relative;
  overflow: hidden;
  padding-top: 72px;
  background: #232323;
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 45% 0 0;
  opacity: .16;
  background-image: repeating-radial-gradient(ellipse at 22% 100%, transparent 0 15px, #65717a 16px 17px);
  transform: rotate(-8deg) scale(1.2);
}
.site-footer .shell { position: relative; z-index: 1; }
.footer-brand img { width: 190px; }
.footer-col h2 { font-size: 15px; }
.footer-col a { font-size: 14px; }
.reveal { transform: translateY(22px); }
@keyframes formalPulse { 0%,100% { transform: scale(.94); opacity: .45; } 50% { transform: scale(1.06); opacity: .9; } }
@keyframes formalStars { to { background-position: 96px 96px, 176px 194px; } }
@keyframes formalWater { 0%,100% { transform: translate(-50%,-50%) scale(.86); opacity: .35; } 50% { transform: translate(-50%,-50%) scale(1.08); opacity: .75; } }

@media (max-width: 980px) {
  .shell { width: min(calc(100% - 48px), var(--max)); }
  .main-nav { background: rgba(255,255,255,.98); }
}
@media (max-width: 680px) {
  .shell { width: min(calc(100% - 30px), var(--max)); }
  .site-header, .nav-wrap { min-height: 68px; }
  .brand img { width: 142px; }
  .main-nav { inset-block-start: 68px; }
  .page-hero { padding: 72px 0 64px; }
  .page-hero h1 { font-size: clamp(48px, 15vw, 70px); }
  .section { padding: 80px 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}