:root {
  color-scheme: light;
  --ink: #171a1f;
  --muted: #62666e;
  --line: rgba(23, 26, 31, 0.11);
  --paper: #fbfaf7;
  --blue: #3978f6;
  --blue-dark: #265bd4;
  --mint: #9de4cf;
  --lavender: #c4c9ff;
  --cream: #f5e6ca;
  --radius: 28px;
  --shadow: 0 30px 80px rgba(38, 49, 70, 0.12);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); overflow-x: hidden; }
button, a { font: inherit; }
a { color: inherit; text-decoration: none; }
button { border: 0; }
.section-shell { width: min(1180px, calc(100% - 48px)); margin-inline: auto; }

.site-header {
  position: fixed; z-index: 20; top: 18px; left: 50%; transform: translateX(-50%);
  width: min(1180px, calc(100% - 32px)); height: 70px; padding: 0 14px 0 18px;
  display: flex; align-items: center; justify-content: space-between;
  border: 1px solid rgba(255,255,255,.78); border-radius: 20px;
  background: rgba(251,250,247,.78); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  box-shadow: 0 12px 38px rgba(33,40,55,.07); transition: background .25s, box-shadow .25s;
}
.site-header.scrolled { background: rgba(251,250,247,.94); box-shadow: 0 14px 40px rgba(33,40,55,.11); }
.brand, .footer-brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 730; letter-spacing: -.03em; }
.brand { font-size: 20px; }
.brand img, .footer-brand img { width: 38px; height: 38px; border-radius: 12px; object-fit: cover; }
nav { display: flex; align-items: center; gap: 34px; color: #4b5058; font-size: 14px; }
nav a { transition: color .2s; }
nav a:hover { color: var(--blue); }
.header-cta { padding: 13px 18px; border-radius: 13px; color: white; background: var(--ink); font-size: 14px; font-weight: 650; }

.hero { min-height: 790px; padding-top: 170px; padding-bottom: 90px; display: grid; grid-template-columns: .92fr 1.3fr; align-items: center; gap: 70px; }
.hero .reveal { opacity: 1; transform: none; }
.eyebrow, .kicker { color: var(--blue); text-transform: uppercase; letter-spacing: .12em; font-weight: 720; font-size: 12px; }
.eyebrow { display: flex; align-items: center; gap: 9px; }
.eyebrow span { width: 8px; height: 8px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 0 5px rgba(157,228,207,.22); }
h1 { margin: 22px 0 26px; font-size: clamp(48px, 5.3vw, 76px); line-height: .99; letter-spacing: -.065em; font-weight: 740; }
h1 em { color: var(--blue); font-style: normal; }
.hero-lead { max-width: 545px; margin: 0; color: var(--muted); font-size: 18px; line-height: 1.78; }
.hero-actions { display: flex; align-items: center; gap: 12px; margin-top: 34px; }
.button { min-height: 52px; padding: 0 23px; display: inline-flex; align-items: center; justify-content: center; gap: 9px; border-radius: 15px; cursor: pointer; font-weight: 680; transition: transform .2s, box-shadow .2s, background .2s; }
.button:hover { transform: translateY(-2px); }
.button svg { width: 19px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.button-primary { color: white; background: var(--blue); box-shadow: 0 12px 28px rgba(57,120,246,.28); }
.button-primary:hover { background: var(--blue-dark); box-shadow: 0 16px 34px rgba(57,120,246,.34); }
.button-ghost { border: 1px solid var(--line); background: rgba(255,255,255,.72); }
.hero-note { margin: 15px 0 0 4px; color: #8c9096; font-size: 12px; }

.hero-visual { position: relative; min-width: 0; }
.app-frame { position: relative; z-index: 2; overflow: hidden; border: 1px solid rgba(255,255,255,.9); border-radius: 24px; background: white; box-shadow: var(--shadow); transform: rotate(1.2deg); }
.app-frame::after { content: ""; position: absolute; inset: 42px 0 0; box-shadow: inset 0 0 60px rgba(255,255,255,.22); pointer-events: none; }
.app-frame img { display: block; width: 100%; aspect-ratio: 1.81; object-fit: cover; object-position: center top; }
.window-bar { height: 42px; padding: 0 15px; display: grid; grid-template-columns: 1fr 1fr 1fr; align-items: center; color: #8c9096; font-size: 11px; border-bottom: 1px solid #eee; }
.window-bar > span { text-align: center; }
.traffic { display: flex; gap: 6px; }
.traffic i { width: 9px; height: 9px; border-radius: 50%; background: #ff605c; }
.traffic i:nth-child(2) { background: #ffbd44; }.traffic i:nth-child(3) { background: #00ca4e; }
.orb { position: absolute; border-radius: 50%; filter: blur(1px); }
.orb-one { width: 300px; height: 300px; top: -95px; right: -90px; background: radial-gradient(circle at 30% 30%, #dce9ff, #c6cdfc 55%, rgba(198,205,252,0)); }
.orb-two { width: 250px; height: 250px; bottom: -100px; left: -90px; background: radial-gradient(circle at 35% 35%, #d7f4e9, #f8e9ce 65%, rgba(248,233,206,0)); }
.floating-card { position: absolute; z-index: 3; display: flex; align-items: center; gap: 12px; padding: 13px 16px; border: 1px solid rgba(255,255,255,.92); border-radius: 16px; background: rgba(255,255,255,.88); backdrop-filter: blur(12px); box-shadow: 0 18px 38px rgba(37,44,60,.13); }
.floating-card strong, .floating-card small { display: block; white-space: nowrap; }.floating-card strong { font-size: 12px; }.floating-card small { margin-top: 4px; color: #858990; font-size: 10px; }
.floating-card-top { top: -30px; left: 8%; animation: float 5s ease-in-out infinite; }
.floating-card-bottom { right: -26px; bottom: -36px; animation: float 5s ease-in-out -2.1s infinite; }
.mini-icon { width: 31px; height: 31px; display: grid; place-items: center; border-radius: 10px; font-weight: 800; }.mint { background: #ddf7ed; color: #208d6d; }.violet { background: #e8e9ff; color: #625ddd; }
@keyframes float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }

.trust-strip { padding: 24px; display: flex; justify-content: center; align-items: center; gap: 26px; border-block: 1px solid var(--line); color: #70747b; font-size: 13px; letter-spacing: .06em; }
.trust-strip i { width: 3px; height: 3px; border-radius: 50%; background: #aeb1b6; }

.features { padding-top: 145px; padding-bottom: 120px; }
.section-heading { display: grid; grid-template-columns: 1.2fr .8fr; column-gap: 70px; align-items: end; margin-bottom: 56px; }
.section-heading .kicker { grid-column: 1 / -1; }
.section-heading h2, .workflow h2, .privacy-card h2, .download-inner h2 { margin: 14px 0 0; font-size: clamp(38px, 4vw, 58px); line-height: 1.08; letter-spacing: -.052em; }
.section-heading > p:last-child { margin: 0 0 6px; color: var(--muted); font-size: 16px; line-height: 1.75; }
.feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.feature-card { min-height: 460px; position: relative; overflow: hidden; padding: 32px; border: 1px solid var(--line); border-radius: var(--radius); background: #f2f0ea; }
.feature-card-wide { min-height: 500px; grid-column: 1 / -1; display: grid; grid-template-columns: .78fr 1.22fr; align-items: center; background: linear-gradient(135deg,#eaf6f4,#ecf0fd 55%,#f7eee0); }
.feature-number { position: absolute; top: 28px; right: 30px; color: rgba(23,26,31,.36); font-size: 12px; letter-spacing: .12em; }
.feature-card h3 { margin: 24px 0 12px; font-size: 28px; letter-spacing: -.035em; }
.feature-card p { max-width: 470px; margin: 0; color: var(--muted); line-height: 1.75; }
.feature-copy { padding: 28px 0 0 20px; }.feature-copy h3 { margin-top: 0; font-size: 38px; }.feature-copy p { font-size: 16px; }
.paper-stack { position: relative; height: 360px; margin-left: 60px; perspective: 1000px; }
.paper { position: absolute; width: 310px; height: 360px; left: 50%; top: 50%; border: 1px solid rgba(20,25,35,.08); border-radius: 10px; background: #fff; box-shadow: 0 20px 45px rgba(39,52,72,.13); }
.paper-back { transform: translate(-43%,-51%) rotate(10deg); opacity: .55; }.paper-middle { transform: translate(-49%,-50%) rotate(4deg); opacity: .8; }
.paper-front { padding: 36px; transform: translate(-55%,-49%) rotate(-3deg); }.paper-front span { color: #8d9199; font-size: 9px; letter-spacing: .15em; }.paper-front h4 { margin: 46px 0 34px; font-family: Georgia, serif; font-size: 28px; font-weight: 500; }
.paper-line { width: 78%; height: 5px; margin: 11px 0; border-radius: 3px; background: #e6e8eb; }.paper-line.long { width: 100%; }.paper-line.short { width: 56%; }
.paper-tags { display: flex; gap: 7px; margin-top: 44px; }.paper-tags b { padding: 6px 9px; border-radius: 8px; color: #4f75b8; background: #ecf3ff; font-size: 10px; font-weight: 600; }.paper-tags b:nth-child(2){color:#2b876d;background:#e9f8f1}.paper-tags b:nth-child(3){color:#8b6b27;background:#fbf1dc}
.icon-scene { height: 215px; position: relative; display: grid; align-content: center; }
.conversation { padding: 20px; }.bubble { width: max-content; max-width: 90%; padding: 14px 17px; border-radius: 16px; font-size: 13px; box-shadow: 0 10px 25px rgba(33,39,50,.07); }.bubble-one { background: white; }.bubble-two { justify-self: end; margin-top: 12px; color: #255dc7; background: #dce8ff; }.cursor-dot { position: absolute; right: 13%; bottom: 27px; width: 14px; height: 14px; border-radius: 50%; background: var(--blue); box-shadow: 0 0 0 7px rgba(57,120,246,.13); }
.dark-card { color: white; background: #20252e; }.dark-card .feature-number { color: rgba(255,255,255,.35); }.dark-card p { color: rgba(255,255,255,.62); }.steps { gap: 10px; padding: 22px 40px; }.step { padding: 14px 17px; border: 1px solid rgba(255,255,255,.09); border-radius: 13px; color: rgba(255,255,255,.55); background: rgba(255,255,255,.035); font-size: 13px; }.step.done { color: #a9ebd5; }.step.active { color: white; border-color: rgba(128,158,255,.42); background: rgba(75,105,203,.2); box-shadow: 0 10px 30px rgba(0,0,0,.18); }.step i { display: inline-block; width: 8px; height: 8px; margin-right: 8px; border-radius: 50%; background: #8da2ff; box-shadow: 0 0 0 5px rgba(141,162,255,.15); }

.workflow { padding: 120px 0 150px; display: grid; grid-template-columns: .9fr 1.1fr; gap: 100px; }
.workflow-intro { position: sticky; top: 140px; align-self: start; }.workflow h2 { font-size: clamp(38px, 4vw, 54px); }
.workflow-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.workflow-list li { min-height: 170px; padding: 34px 8px; display: grid; grid-template-columns: 58px 1fr; border-bottom: 1px solid var(--line); }
.workflow-list li > span { width: 36px; height: 36px; display: grid; place-items: center; border-radius: 50%; color: var(--blue); background: #e5edff; font-size: 13px; font-weight: 750; }
.workflow-list h3 { margin: 4px 0 11px; font-size: 23px; letter-spacing: -.03em; }.workflow-list p { max-width: 460px; margin: 0; color: var(--muted); line-height: 1.7; }

.privacy-section { padding-bottom: 140px; }.privacy-card { min-height: 340px; padding: 55px 60px; display: grid; grid-template-columns: 100px 1.3fr .7fr; align-items: center; gap: 36px; border-radius: 34px; color: white; background: linear-gradient(135deg,#1b2029,#252d3b); box-shadow: 0 30px 70px rgba(17,24,35,.14); }
.privacy-mark { width: 82px; height: 82px; display: grid; place-items: center; border-radius: 25px; background: linear-gradient(135deg,#9ce4cf,#9cb6ff); }.privacy-mark svg { width: 40px; fill: none; stroke: #17202c; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.privacy-card .kicker { color: #9de4cf; }.privacy-card h2 { font-size: 40px; }.privacy-card > p { color: rgba(255,255,255,.62); line-height: 1.75; }

.download-section { position: relative; overflow: hidden; padding: 120px 0 130px; text-align: center; background: #edf1fb; }
.download-section::before,.download-section::after { content:""; position:absolute; width:450px; height:450px; border-radius:50%; filter:blur(2px); opacity:.52; }.download-section::before { left:-180px; bottom:-270px; background:#c5eadf; }.download-section::after { right:-190px; top:-250px; background:#c7ccff; }
.download-inner { position: relative; z-index: 1; }.download-inner img { width: 130px; height: 130px; margin-bottom: 24px; border-radius: 35px; object-fit: cover; box-shadow: 0 18px 40px rgba(57,80,120,.14); }.download-inner h2 { margin: 14px auto 34px; max-width: 800px; }.button-large { min-width: 205px; min-height: 58px; }.download-note { color: #7f848c; font-size: 12px; }
.site-footer { min-height: 120px; display: grid; grid-template-columns: 1fr 1fr 1fr; align-items: center; color: #858990; font-size: 12px; }.site-footer > p:nth-child(2) { text-align: center; }.site-footer > p:last-child { text-align: right; }.footer-brand { color: var(--ink); font-size: 16px; }.footer-brand img { width: 30px; height: 30px; border-radius: 9px; }
.toast { position: fixed; z-index: 40; left: 50%; bottom: 26px; transform: translate(-50%,20px); padding: 14px 20px; border-radius: 14px; color: white; background: rgba(25,29,36,.94); box-shadow: 0 14px 40px rgba(18,24,34,.2); opacity: 0; pointer-events: none; transition: opacity .25s, transform .25s; font-size: 13px; }.toast.visible { opacity: 1; transform: translate(-50%,0); }
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 900px) {
  .site-header { height: 62px; }.site-header nav { display: none; }.header-cta { padding: 11px 14px; }
  .hero { padding-top: 140px; grid-template-columns: 1fr; gap: 78px; }.hero-copy { text-align: center; }.eyebrow,.hero-actions { justify-content: center; }.hero-lead { margin-inline: auto; }.hero-note { text-align:center; }.hero-visual { width: 92%; margin-inline:auto; }
  .section-heading { display: block; }.section-heading > p:last-child { margin-top: 26px; max-width: 600px; }
  .feature-card-wide { grid-template-columns: 1fr; padding-top: 70px; }.paper-stack { margin-left: 0; }
  .workflow { grid-template-columns: 1fr; gap: 60px; }.workflow-intro { position: static; }
  .privacy-card { grid-template-columns: 82px 1fr; }.privacy-card > p { grid-column: 2; }
}

@media (max-width: 620px) {
  .section-shell { width: min(100% - 28px,1180px); }.site-header { top: 10px; width: calc(100vw - 20px); }.brand img { width: 34px; height: 34px; }.header-cta { flex: 0 0 auto; font-size: 12px; }
  .hero { min-height: auto; padding-top: 126px; padding-bottom: 70px; }.hero-lead { font-size: 16px; }.hero-actions { flex-direction: column; }.hero-actions .button { width: 100%; }.hero-visual { width: 100%; }.floating-card-top { left: 3%; top: -42px; }.floating-card-bottom { right: -5px; bottom: -54px; }.floating-card { padding: 10px 12px; }.floating-card small { display: none; }
  .trust-strip { gap: 11px; padding-inline: 8px; font-size: 10px; }.features { padding-top: 105px; padding-bottom: 90px; }
  .feature-grid { grid-template-columns: 1fr; }.feature-card,.feature-card-wide { grid-column: auto; min-height: 430px; padding: 24px; }.feature-card-wide { display:block; padding-top:65px; }.feature-copy { padding:0; }.feature-copy h3 { font-size: 30px; }.paper-stack { height: 290px; margin-top: 24px; transform: scale(.78); transform-origin: center top; }
  .workflow { padding: 85px 0 100px; }.workflow-list li { grid-template-columns: 50px 1fr; }
  .privacy-section { padding-bottom: 90px; }.privacy-card { padding: 35px 26px; display: block; }.privacy-mark { margin-bottom: 30px; }.privacy-card h2 { font-size: 34px; }.privacy-card > p { margin-top: 25px; }
  .download-section { padding: 90px 0; }.download-inner img { width: 105px; height: 105px; }.site-footer { padding: 30px 0; grid-template-columns: 1fr; gap: 12px; text-align: center; }.site-footer > p:nth-child(2),.site-footer > p:last-child { text-align: center; }.footer-brand { justify-content: center; }
}

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