:root {
  --ink: #0b0f14;
  --paper: #f5f7fa;
  --white: #ffffff;
  --blue: #315cff;
  --green: #37e0b1;
  --steel: #9aa5b1;
  --line: #d8dde5;
  --muted: #5d6672;
  --display: "Arial Nova", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  --body: "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --max: 1440px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--body); -webkit-font-smoothing: antialiased; }
body.nav-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input, textarea { font: inherit; }
button { color: inherit; }
::selection { background: var(--green); color: var(--ink); }

.skip-link { position: fixed; top: 12px; left: 12px; z-index: 100; padding: 10px 14px; background: var(--ink); color: #fff; transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }

.site-header { position: fixed; top: 0; left: 0; z-index: 50; width: 100%; height: 82px; padding: 0 max(28px, calc((100vw - var(--max)) / 2)); display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid rgba(11,15,20,.1); background: rgba(245,247,250,.88); backdrop-filter: blur(18px); transition: height .3s ease, box-shadow .3s ease; }
.site-header.is-scrolled { height: 68px; box-shadow: 0 10px 35px rgba(11,15,20,.06); }
.brand { position: relative; z-index: 2; }
.brand img { width: 208px; height: auto; }
.site-nav { display: flex; align-items: center; gap: 34px; font-size: 14px; }
.site-nav > a:not(.nav-cta) { position: relative; }
.site-nav > a:not(.nav-cta)::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -8px; height: 2px; background: var(--blue); transition: right .25s ease; }
.site-nav > a:not(.nav-cta):hover::after { right: 0; }
.nav-cta { padding: 13px 17px; background: var(--ink); color: #fff; }
.nav-cta span { color: var(--green); margin-left: 8px; }
.menu-toggle { display: none; border: 0; background: transparent; }

.hero { position: relative; min-height: 100vh; padding: 170px max(28px, calc((100vw - var(--max)) / 2)) 42px; display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(440px, .95fr); grid-template-rows: 1fr auto; column-gap: 72px; align-items: center; overflow: hidden; }
.hero-grid { position: absolute; inset: 82px 0 0; opacity: .65; background-image: linear-gradient(rgba(49,92,255,.075) 1px, transparent 1px), linear-gradient(90deg, rgba(49,92,255,.075) 1px, transparent 1px); background-size: 64px 64px; mask-image: linear-gradient(to bottom, #000 0%, transparent 88%); }
.hero::before { content: ""; position: absolute; width: 620px; height: 620px; right: -260px; top: 60px; border: 1px solid rgba(49,92,255,.22); border-radius: 50%; box-shadow: inset 0 0 0 100px rgba(49,92,255,.025), inset 0 0 0 200px rgba(49,92,255,.02); }
.hero-copy, .build-console, .hero-foot { position: relative; z-index: 1; }
.eyebrow, .kicker { display: inline-flex; align-items: center; gap: 10px; color: var(--blue); font: 700 11px/1.2 var(--mono); letter-spacing: .12em; }
.live-dot { width: 7px; height: 7px; background: var(--green); box-shadow: 0 0 0 5px rgba(55,224,177,.16); animation: pulse 2s infinite; }
.hero h1 { margin: 28px 0 30px; max-width: 810px; font: 750 clamp(52px, 5.3vw, 88px)/.98 var(--display); letter-spacing: -.065em; }
.hero h1 em { color: var(--blue); font-style: normal; }
.hero-copy > p { max-width: 660px; margin: 0; color: var(--muted); font-size: 18px; line-height: 1.8; }
.hero-actions { display: flex; align-items: center; gap: 38px; margin-top: 44px; }
.button { display: inline-flex; align-items: center; justify-content: space-between; min-width: 178px; padding: 17px 20px; font-size: 14px; font-weight: 650; }
.button-primary { background: var(--blue); color: #fff; box-shadow: 0 12px 28px rgba(49,92,255,.22); }
.button-primary span { color: var(--green); }
.text-link { padding: 12px 0; border-bottom: 1px solid var(--ink); font-size: 14px; }
.text-link span { margin-left: 14px; color: var(--blue); }

.build-console { align-self: center; border: 1px solid #b8c0cc; background: rgba(255,255,255,.84); box-shadow: 28px 32px 0 rgba(49,92,255,.08), 0 30px 90px rgba(11,15,20,.12); backdrop-filter: blur(14px); }
.console-topbar, .console-footer { display: flex; align-items: center; justify-content: space-between; font: 700 10px/1 var(--mono); letter-spacing: .09em; }
.console-topbar { padding: 16px 18px; border-bottom: 1px solid var(--line); }
.console-status { color: #257d64; }
.console-status i { display: inline-block; width: 6px; height: 6px; margin-right: 8px; background: var(--green); }
.console-body { padding: 28px 28px 22px; }
.build-track { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; padding-top: 25px; }
.track-line { position: absolute; left: 10%; right: 10%; top: 10px; height: 1px; background: #c8ced8; }
.track-line i { display: block; width: 56%; height: 3px; margin-top: -1px; background: var(--blue); animation: loadline 4s ease-in-out infinite alternate; }
.build-node { position: relative; padding-top: 12px; }
.build-node::before { content: ""; position: absolute; top: -20px; left: 0; width: 9px; height: 9px; border: 2px solid var(--paper); background: #aab2bd; box-shadow: 0 0 0 1px #aab2bd; }
.build-node.is-active::before { background: var(--green); box-shadow: 0 0 0 1px var(--green), 0 0 0 6px rgba(55,224,177,.15); }
.build-node span, .build-node small { display: block; font: 700 9px/1.2 var(--mono); letter-spacing: .08em; color: #7c8693; }
.build-node strong { display: block; min-height: 40px; margin: 8px 0 5px; font-size: 13px; }
.console-log { margin-top: 30px; padding: 15px 17px; background: var(--ink); color: #c4cbd4; font: 10px/1.8 var(--mono); }
.console-log p { margin: 0; white-space: nowrap; }
.console-log span { color: #697585; margin-right: 13px; }
.console-log .log-focus { color: #fff; }
.console-log .cursor { display: inline-block; width: 7px; height: 12px; margin: 0 0 -2px 5px; background: var(--green); animation: blink .9s steps(1) infinite; }
.console-footer { padding: 14px 18px; border-top: 1px solid var(--line); color: #6f7985; }
.console-footer span:nth-child(2) { color: var(--blue); }
.hero-foot { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 74px; border-top: 1px solid #cdd3dc; }
.hero-foot span { padding: 20px 0 0; color: var(--muted); font: 700 11px/1 var(--mono); letter-spacing: .12em; }
.hero-foot span:not(:first-child) { padding-left: 24px; border-left: 1px solid #cdd3dc; }

.section { padding: 138px max(28px, calc((100vw - var(--max)) / 2)); scroll-margin-top: 68px; }
.section-heading { display: grid; grid-template-columns: 1.15fr .85fr; gap: 80px; align-items: end; margin-bottom: 74px; }
.section-heading h2, .services h2, .about h2, .contact h2 { margin: 20px 0 0; font: 730 clamp(42px, 4.4vw, 70px)/1.08 var(--display); letter-spacing: -.055em; }
.section-heading > p { max-width: 530px; margin: 0 0 6px; color: var(--muted); font-size: 17px; line-height: 1.9; }
.case-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 78px 24px; }
.case-card { grid-column: span 6; }
.case-card.case-wide { grid-column: span 7; }
.case-card.case-narrow { grid-column: span 5; }
.case-image { position: relative; aspect-ratio: 16 / 10; overflow: hidden; background: #e1e5eb; }
.case-image::after { content: ""; position: absolute; inset: 0; border: 1px solid rgba(11,15,20,.08); pointer-events: none; }
.case-image img { width: 100%; height: 100%; object-fit: cover; object-position: top center; filter: saturate(.82); transition: transform .7s cubic-bezier(.2,.75,.2,1), filter .35s ease; }
.case-card:hover .case-image img { transform: scale(1.025); filter: saturate(1); }
.case-meta { display: flex; justify-content: space-between; gap: 20px; margin-top: 19px; color: var(--blue); font: 700 10px/1.4 var(--mono); letter-spacing: .08em; }
.case-card h3 { margin: 14px 0 8px; font: 700 26px/1.2 var(--display); letter-spacing: -.035em; }
.case-card p { margin: 0; max-width: 580px; color: var(--muted); line-height: 1.75; }

.services { position: relative; color: #fff; background: var(--ink); overflow: hidden; }
.services::before { content: "CK"; position: absolute; right: -1vw; top: -6vw; color: rgba(255,255,255,.025); font: 800 40vw/1 var(--display); letter-spacing: -.12em; }
.services-intro { position: relative; max-width: 900px; margin-bottom: 86px; }
.kicker-light { color: var(--green); }
.services-intro p { max-width: 600px; margin: 25px 0 0; color: #aeb6c2; font-size: 17px; line-height: 1.8; }
.service-list { position: relative; border-top: 1px solid #323945; }
.service-item { display: grid; grid-template-columns: 100px minmax(280px, .75fr) 1fr auto; gap: 28px; align-items: center; padding: 30px 0; border-bottom: 1px solid #323945; transition: padding .3s ease, background .3s ease; }
.service-item:hover { padding-left: 18px; padding-right: 18px; background: rgba(49,92,255,.12); }
.service-code { color: var(--green); font: 700 11px/1 var(--mono); letter-spacing: .12em; }
.service-item h3 { margin: 0; font: 650 24px/1.2 var(--display); letter-spacing: -.025em; }
.service-item p { margin: 0; color: #99a3af; }
.service-item i { color: var(--green); font-style: normal; font-size: 20px; }

.process { background: #fff; }
.process-track { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 34px; padding-top: 52px; }
.process-line { position: absolute; top: 12px; left: 0; right: 0; height: 1px; background: var(--line); }
.process-line i { display: block; width: 0; height: 3px; margin-top: -1px; background: var(--blue); transition: width 1.4s cubic-bezier(.25,.8,.25,1); }
.process-track.is-visible .process-line i { width: 100%; }
.process-step { position: relative; padding: 26px 24px 30px; border-left: 1px solid var(--line); }
.process-step::before { content: ""; position: absolute; left: -5px; top: -45px; width: 9px; height: 9px; background: var(--blue); box-shadow: 0 0 0 7px #eef1ff; }
.process-step span { color: var(--blue); font: 700 10px/1 var(--mono); letter-spacing: .08em; }
.process-step h3 { margin: 20px 0 13px; font: 680 25px/1.2 var(--display); }
.process-step p { margin: 0; color: var(--muted); line-height: 1.8; }

.about { display: grid; grid-template-columns: .7fr 1.3fr; gap: 120px; align-items: center; background: var(--green); }
.about-mark { display: flex; align-items: center; justify-content: center; min-height: 440px; background: rgba(255,255,255,.27); border: 1px solid rgba(11,15,20,.12); }
.about-mark img { width: min(55%, 250px); }
.about-copy { max-width: 760px; }
.about-copy .kicker { color: #175c4c; }
.about-copy > p { max-width: 690px; margin: 30px 0 0; font-size: 18px; line-height: 1.9; }
.about-principles { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 42px; }
.about-principles span { padding: 12px 15px; border: 1px solid rgba(11,15,20,.28); font-size: 13px; font-weight: 650; }

.contact { display: grid; grid-template-columns: .9fr 1.1fr; gap: 100px; color: #fff; background: var(--blue); }
.contact-heading h2 { font-size: clamp(40px, 4.5vw, 68px); }
.contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 30px 22px; align-self: start; }
.contact-form label { display: block; }
.contact-form label span { display: block; margin-bottom: 11px; color: #dbe2ff; font: 700 10px/1 var(--mono); letter-spacing: .1em; }
.contact-form input, .contact-form textarea { width: 100%; border: 0; border-bottom: 1px solid rgba(255,255,255,.5); border-radius: 0; padding: 12px 0 16px; outline: none; color: #fff; background: transparent; resize: vertical; }
.contact-form input::placeholder, .contact-form textarea::placeholder { color: rgba(255,255,255,.58); }
.contact-form input:focus, .contact-form textarea:focus { border-color: var(--green); }
.field-wide { grid-column: 1 / -1; }
.contact-form button { grid-column: 1 / -1; display: flex; align-items: center; justify-content: space-between; border: 0; padding: 18px 20px; background: var(--green); color: var(--ink); font-weight: 700; cursor: pointer; }
.form-note { grid-column: 1 / -1; margin: -15px 0 0; color: #dbe2ff; font-size: 12px; line-height: 1.6; }

.site-footer { min-height: 230px; padding: 60px max(28px, calc((100vw - var(--max)) / 2)); display: grid; grid-template-columns: 1fr 1fr auto; gap: 40px; align-items: end; color: #a7b0bd; background: var(--ink); font-size: 12px; }
.site-footer img { width: 220px; }
.site-footer div { display: flex; gap: 28px; }
.site-footer p { margin: 0; }

.reveal { opacity: 0; transform: translateY(26px); transition: opacity .75s ease, transform .75s cubic-bezier(.2,.75,.2,1); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

@keyframes pulse { 50% { box-shadow: 0 0 0 9px rgba(55,224,177,0); } }
@keyframes blink { 50% { opacity: 0; } }
@keyframes loadline { from { width: 24%; } to { width: 88%; } }

@media (max-width: 1100px) {
  .hero { grid-template-columns: 1fr; padding-top: 150px; }
  .hero-copy { max-width: 850px; }
  .build-console { width: min(680px, 100%); margin: 74px 0 0 auto; }
  .section-heading { grid-template-columns: 1fr 1fr; }
  .about, .contact { gap: 60px; }
}

@media (max-width: 800px) {
  .site-header { height: 70px; padding-inline: 20px; background: var(--paper); backdrop-filter: none; }
  .brand img { width: 174px; }
  .menu-toggle { position: relative; z-index: 2; display: flex; align-items: center; gap: 12px; padding: 10px 0; font-size: 12px; }
  .menu-toggle i, .menu-toggle i::before { display: block; width: 22px; height: 1px; background: var(--ink); transition: transform .3s ease; }
  .menu-toggle i { position: relative; }
  .menu-toggle i::before { content: ""; position: absolute; top: -6px; }
  .menu-toggle[aria-expanded="true"] i { transform: rotate(45deg); }
  .menu-toggle[aria-expanded="true"] i::before { top: 0; transform: rotate(90deg); }
  .site-nav { position: fixed; inset: 0; z-index: 1; display: flex; flex-direction: column; align-items: flex-start; justify-content: center; gap: 0; padding: 92px 28px 42px; visibility: hidden; opacity: 0; overflow-y: auto; background: var(--paper); transition: opacity .25s ease, visibility .25s ease; }
  .site-nav.is-open { visibility: visible; opacity: 1; }
  .site-nav a { width: 100%; padding: 17px 0; border-bottom: 1px solid var(--line); font: 650 28px/1.2 var(--display); }
  .site-nav .nav-cta { margin-top: 20px; padding: 17px; border: 0; font-size: 17px; }
  .hero { min-height: auto; padding: 135px 20px 30px; }
  .hero h1 { font-size: clamp(47px, 13vw, 70px); }
  .hero-copy > p { font-size: 16px; }
  .build-console { margin-top: 62px; box-shadow: 13px 15px 0 rgba(49,92,255,.08); }
  .build-track { grid-template-columns: 1fr 1fr; gap: 28px 16px; }
  .track-line { display: none; }
  .build-node::before { top: -3px; }
  .build-node { padding: 16px 0 0 18px; border-top: 1px solid var(--line); }
  .console-log { overflow: hidden; }
  .hero-foot { grid-template-columns: 1fr 1fr; gap: 0; margin-top: 62px; }
  .hero-foot span { padding: 18px 0; border-top: 1px solid #cdd3dc; }
  .hero-foot span:not(:first-child) { padding-left: 0; border-left: 0; }
  .section { padding: 95px 20px; }
  .section-heading { grid-template-columns: 1fr; gap: 34px; margin-bottom: 52px; }
  .section-heading h2, .services h2, .about h2, .contact h2 { font-size: clamp(39px, 11vw, 58px); }
  .case-grid { display: block; }
  .case-card { display: block; margin-bottom: 58px; }
  .service-item { grid-template-columns: 58px 1fr auto; gap: 14px; }
  .service-item p { grid-column: 2 / -1; }
  .process-track { grid-template-columns: 1fr 1fr; gap: 35px 10px; }
  .process-line { display: none; }
  .process-step::before { top: -5px; }
  .about, .contact { grid-template-columns: 1fr; gap: 52px; }
  .about-mark { min-height: 300px; }
  .site-footer { grid-template-columns: 1fr; min-height: 300px; align-items: start; }
}

@media (max-width: 520px) {
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 14px; }
  .button { width: 100%; }
  .console-footer { flex-wrap: wrap; gap: 10px; }
  .process-track { grid-template-columns: 1fr; }
  .contact-form { grid-template-columns: 1fr; }
  .field-wide, .contact-form button, .form-note { grid-column: 1; }
}

@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; }
}