:root {
  color-scheme: light;
  --navy: #071445;
  --navy-deep: #030a27;
  --blue: #0829c0;
  --blue-bright: #1646ea;
  --sky: #edf3ff;
  --paper: #f7f9fd;
  --white: #ffffff;
  --ink: #071445;
  --muted: #66718b;
  --line: rgba(7, 20, 69, .13);
  --line-dark: rgba(255, 255, 255, .14);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 96px; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button, select { cursor: pointer; }
::selection { color: #fff; background: var(--blue); }
:focus-visible { outline: 2px solid var(--blue-bright); outline-offset: 4px; }

.site-shell { min-height: 100vh; overflow: clip; background: var(--paper); }
.page-width { width: min(1180px, calc(100% - 64px)); margin-inline: auto; }
.skip-link { position: fixed; top: 10px; left: 10px; z-index: 100; transform: translateY(-160%); padding: 11px 15px; color: #fff; background: var(--blue); }
.skip-link:focus { transform: translateY(0); }

.site-header { position: sticky; top: 0; z-index: 40; background: rgba(255, 255, 255, .91); border-bottom: 1px solid var(--line); backdrop-filter: blur(16px); }
.nav-shell { min-height: 82px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; min-width: 152px; }
.logo-viewport { width: 150px; height: 43px; display: block; overflow: hidden; position: relative; }
.logo-viewport img { width: 100%; height: auto; display: block; transform: translateY(-32.5%); }
.nav-links { display: flex; align-items: center; gap: 34px; color: var(--muted); font-size: 13px; }
.nav-links a { transition: color .2s ease; }
.nav-links a:hover { color: var(--blue); }
.nav-cta { min-height: 44px; display: inline-flex; align-items: center; gap: 20px; padding: 0 17px; color: #fff; background: var(--navy); font-size: 12px; font-weight: 700; letter-spacing: .03em; }
.nav-cta span { color: #8da8ff; }

.hero { min-height: 780px; display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 68px; padding: 76px 0 94px; position: relative; }
.hero::before { content: ""; position: absolute; width: 520px; height: 520px; left: -360px; top: 80px; border-radius: 50%; background: radial-gradient(circle, rgba(22,70,234,.11), transparent 67%); pointer-events: none; }
.hero-copy { position: relative; z-index: 2; }
.eyebrow { display: flex; align-items: center; gap: 12px; color: var(--blue); font-size: 11px; font-weight: 800; letter-spacing: .19em; }
.eyebrow span { width: 34px; height: 2px; background: var(--blue); }
.hero h1 { margin: 31px 0 25px; max-width: 690px; font-size: clamp(44px, 4.8vw, 62px); line-height: 1.08; letter-spacing: -.065em; font-weight: 700; }
.hero h1 em { color: var(--blue); font-style: normal; }
.hero-copy > p { max-width: 610px; margin: 0; color: var(--muted); font-size: 17px; line-height: 1.9; letter-spacing: .01em; }
.hero-actions { margin-top: 37px; display: flex; align-items: center; gap: 15px; }
.primary-action, .secondary-action { min-height: 52px; display: inline-flex; align-items: center; justify-content: center; padding: 0 22px; font-size: 13px; font-weight: 700; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
.primary-action { min-width: 160px; color: #fff; background: var(--blue); box-shadow: 0 16px 42px rgba(8,41,192,.18); }
.primary-action span { margin-left: 34px; }
.primary-action:hover { transform: translateY(-2px); box-shadow: 0 20px 48px rgba(8,41,192,.28); }
.secondary-action { min-width: 124px; color: var(--navy); border: 1px solid var(--line); background: #fff; }
.secondary-action:hover { transform: translateY(-2px); border-color: rgba(8,41,192,.4); }
.service-line { margin-top: 48px; display: flex; align-items: center; flex-wrap: wrap; gap: 13px; color: var(--muted); font-size: 11px; letter-spacing: .06em; }
.service-line i { width: 3px; height: 3px; border-radius: 50%; background: var(--blue); }

.hero-stage { min-height: 565px; position: relative; color: #fff; background: linear-gradient(150deg, #092262 0%, var(--navy-deep) 74%); box-shadow: 0 38px 90px rgba(7,20,69,.22); overflow: hidden; isolation: isolate; }
.hero-stage::before { content: "OVAN"; position: absolute; left: -12px; bottom: -38px; color: rgba(255,255,255,.035); font-size: 140px; font-weight: 900; letter-spacing: -.08em; }
.hero-stage::after { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 65% 24%, rgba(55,104,255,.38), transparent 34%), linear-gradient(115deg, transparent 38%, rgba(255,255,255,.03) 39%, transparent 40%); pointer-events: none; }
.stage-grid { position: absolute; inset: 0; opacity: .22; background-image: linear-gradient(rgba(255,255,255,.09) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.09) 1px, transparent 1px); background-size: 45px 45px; mask-image: linear-gradient(90deg, transparent, #000 24%, #000); }
.stage-orbit { position: absolute; border: 1px solid rgba(141,168,255,.25); border-radius: 50%; left: 52%; top: 49%; transform: translate(-50%, -50%); }
.orbit-large { width: 470px; height: 470px; }
.orbit-small { width: 330px; height: 330px; border-style: dashed; animation: rotate 30s linear infinite; }
.vertical-frame { position: absolute; left: 50%; top: 50%; width: 225px; height: 390px; border: 1px solid rgba(255,255,255,.16); overflow: hidden; }
.vertical-frame > span { position: absolute; left: 13px; bottom: 15px; font-size: 8px; letter-spacing: .2em; }
.vertical-frame > b { position: absolute; right: 15px; top: 14px; color: rgba(255,255,255,.45); font: 500 32px Georgia, serif; }
.frame-left { transform: translate(-85%, -48%) rotate(-7deg); background: linear-gradient(170deg, rgba(22,70,234,.46), rgba(3,10,39,.82)); }
.frame-right { transform: translate(-15%, -52%) rotate(8deg); background: linear-gradient(170deg, rgba(82,119,239,.3), rgba(3,10,39,.9)); }
.frame-main { z-index: 3; transform: translate(-50%, -50%); background: linear-gradient(180deg, #123dce 0%, #06123b 65%); box-shadow: 0 30px 60px rgba(0,0,0,.35); padding: 14px; }
.frame-main::after { content: ""; position: absolute; inset: 0; opacity: .18; background: repeating-linear-gradient(90deg, transparent 0 11px, rgba(255,255,255,.1) 12px); }
.frame-bar { position: relative; z-index: 5; display: flex; justify-content: space-between; color: rgba(255,255,255,.68); font-size: 7px; letter-spacing: .14em; }
.frame-bar-bottom { position: absolute; left: 14px; right: 14px; bottom: 12px; }
.story-light { position: absolute; width: 125px; height: 125px; left: 50%; top: 72px; transform: translateX(-50%); border-radius: 50%; background: radial-gradient(circle at 42% 36%, #e8eeff 0%, #8eadff 38%, rgba(92,131,255,.3) 67%, transparent 69%); filter: drop-shadow(0 0 30px rgba(113,150,255,.48)); }
.story-figure { position: absolute; z-index: 2; width: 115px; height: 250px; left: 50%; bottom: 0; transform: translateX(-50%); clip-path: polygon(39% 0, 61% 0, 66% 15%, 79% 37%, 96% 100%, 4% 100%, 22% 37%, 34% 15%); background: linear-gradient(90deg, #01030d, #111d50 50%, #01030d); }
.frame-message { position: absolute; z-index: 6; left: 18px; bottom: 55px; }
.frame-message small { display: block; color: #96b0ff; font-size: 7px; letter-spacing: .18em; }
.frame-message strong { display: block; margin-top: 7px; color: #fff; font-size: 23px; line-height: .98; letter-spacing: .04em; }
.stage-note { position: absolute; z-index: 6; padding: 14px 16px; border: 1px solid rgba(255,255,255,.14); background: rgba(3,10,39,.68); backdrop-filter: blur(12px); }
.stage-note small { display: block; color: #8da8ff; font-size: 7px; letter-spacing: .19em; }
.stage-note strong { display: block; margin-top: 5px; font-size: 14px; }
.note-top { left: 24px; top: 25px; }
.note-bottom { right: 20px; bottom: 25px; min-width: 166px; }
.note-bottom span { display: block; margin-top: 9px; color: rgba(255,255,255,.56); font-size: 9px; }
.note-bottom span b { display: inline-block; width: 5px; height: 5px; margin-right: 6px; border-radius: 50%; background: #66d39b; }

.section-label { display: flex; align-items: center; gap: 11px; color: var(--muted); font-size: 10px; font-weight: 800; letter-spacing: .21em; }
.section-label span { color: var(--blue); font: 500 12px Georgia, serif; letter-spacing: 0; }
.section-label.light { color: rgba(255,255,255,.48); }
.section-label.light span { color: #8da8ff; }
.about-section { padding: 132px 0 146px; }
.about-layout { margin-top: 42px; display: grid; grid-template-columns: .95fr 1.05fr; gap: 92px; }
.about-layout h2, .section-heading h2, .workflow-intro h2, .human-ai-title h2, .contact-copy h2 { margin: 0; font-size: clamp(36px, 4.1vw, 56px); line-height: 1.18; letter-spacing: -.045em; }
.lead { margin: 0 0 42px; color: var(--muted); font-size: 17px; line-height: 1.92; }
.principle-cards { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
.principle-cards article { padding: 25px 22px 0 0; }
.principle-cards article + article { padding-left: 22px; border-left: 1px solid var(--line); }
.principle-cards span { color: var(--blue); font: 500 12px Georgia, serif; }
.principle-cards h3 { margin: 20px 0 10px; font-size: 15px; }
.principle-cards p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.75; }

.scope-section { padding: 128px 0 144px; color: #fff; background: var(--navy-deep); }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 70px; margin-bottom: 58px; }
.section-heading .section-label { margin-bottom: 27px; }
.section-heading > p { width: 390px; flex: none; margin: 0 0 4px; color: var(--muted); font-size: 14px; line-height: 1.8; }
.scope-section .section-heading > p { color: rgba(255,255,255,.52); }
.scope-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.scope-card { min-width: 0; }
.scope-card > span { display: block; margin-bottom: 14px; color: rgba(255,255,255,.42); font-size: 9px; letter-spacing: .15em; }
.scope-art { height: 390px; position: relative; overflow: hidden; border: 1px solid rgba(255,255,255,.12); transition: transform .3s ease; }
.scope-card:hover .scope-art { transform: translateY(-5px); }
.scope-art::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 38%, rgba(0,0,0,.58)); }
.scope-art i { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); border: 1px solid rgba(255,255,255,.32); border-radius: 50%; }
.scope-art b { position: absolute; z-index: 2; left: 24px; bottom: 23px; font-size: 54px; font-weight: 600; }
.scope-story .scope-art { background: linear-gradient(155deg, #214fe1, #06133d 68%); }
.scope-story .scope-art i { width: 220px; height: 220px; box-shadow: 0 0 70px rgba(56,101,255,.3); }
.scope-image .scope-art { background: linear-gradient(155deg, #112e89, #02071f 68%); }
.scope-image .scope-art i { width: 150px; height: 260px; border-radius: 0; transform: translate(-50%, -50%) rotate(9deg); background: rgba(31,72,210,.18); }
.scope-finish .scope-art { background: linear-gradient(155deg, #486fec, #08143b 66%); }
.scope-finish .scope-art i { width: 340px; height: 120px; transform: translate(-30%, -50%) rotate(-23deg); }
.scope-card h3 { margin: 20px 0 10px; font-size: 22px; }
.scope-card p { margin: 0; color: rgba(255,255,255,.52); font-size: 13px; line-height: 1.75; }

.services-section { padding: 132px 0 148px; }
.services-grid { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.services-grid article { min-height: 305px; position: relative; padding: 30px 32px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: #fff; transition: transform .2s ease, background .2s ease; }
.services-grid article:hover { z-index: 2; transform: translateY(-3px); background: var(--sky); }
.service-top { display: flex; align-items: center; justify-content: space-between; }
.service-top span { color: var(--blue); font: 500 12px Georgia, serif; }
.service-top i { width: 24px; height: 24px; position: relative; border: 1px solid var(--line); border-radius: 50%; }
.service-top i::before, .service-top i::after { content: ""; position: absolute; left: 50%; top: 50%; background: var(--blue); transform: translate(-50%, -50%); }
.service-top i::before { width: 8px; height: 1px; }
.service-top i::after { width: 1px; height: 8px; }
.services-grid h3 { margin: 58px 0 15px; font-size: 23px; }
.services-grid p { max-width: 455px; margin: 0; color: var(--muted); font-size: 14px; line-height: 1.8; }
.services-grid small { position: absolute; left: 32px; bottom: 30px; color: var(--muted); font-size: 10px; letter-spacing: .04em; }

.workflow-section { padding: 130px 0 144px; color: #fff; background: var(--navy); }
.workflow-intro { margin: 39px 0 74px; display: grid; grid-template-columns: 1.1fr .7fr; align-items: end; gap: 100px; }
.workflow-intro p { margin: 0 0 3px; color: rgba(255,255,255,.54); font-size: 14px; line-height: 1.85; }
.workflow-grid { display: grid; grid-template-columns: repeat(5, 1fr); border-top: 1px solid var(--line-dark); }
.workflow-grid article { min-width: 0; position: relative; padding: 27px 19px 0 0; }
.workflow-grid article:not(:last-child)::after { content: "→"; position: absolute; right: 12px; top: 22px; color: rgba(255,255,255,.25); }
.workflow-grid span { color: #8da8ff; font: 500 12px Georgia, serif; }
.workflow-grid i { display: block; width: 7px; height: 7px; margin: -31px 0 36px; border-radius: 50%; background: #8da8ff; box-shadow: 0 0 0 5px var(--navy), 0 0 0 6px rgba(141,168,255,.45); }
.workflow-grid h3 { margin: 0 0 11px; font-size: 15px; }
.workflow-grid p { margin: 0; color: rgba(255,255,255,.48); font-size: 11px; line-height: 1.7; }

.principles-section { padding: 132px 0 145px; }
.human-ai-grid { margin-top: 42px; display: grid; grid-template-columns: 1.18fr .82fr .82fr; gap: 20px; }
.human-ai-title { padding: 22px 55px 20px 0; }
.human-ai-title p { max-width: 485px; margin: 28px 0 0; color: var(--muted); font-size: 14px; line-height: 1.85; }
.role-card { min-height: 370px; padding: 30px; border: 1px solid var(--line); display: flex; flex-direction: column; background: #fff; }
.role-card small { color: var(--blue); font-size: 9px; font-weight: 800; letter-spacing: .18em; }
.role-card h3 { margin: 58px 0 28px; font-size: 20px; line-height: 1.4; }
.role-card ul { margin: auto 0 0; padding: 0; list-style: none; }
.role-card li { padding: 11px 0 11px 18px; position: relative; color: var(--muted); border-top: 1px solid var(--line); font-size: 13px; }
.role-card li::before { content: "+"; position: absolute; left: 0; color: var(--blue); }
.human-card { color: #fff; background: var(--navy-deep); }
.human-card small, .human-card li::before { color: #8da8ff; }
.human-card li { color: rgba(255,255,255,.55); border-color: var(--line-dark); }
.assurance-line { min-height: 78px; margin-top: 58px; padding: 0 24px; display: flex; align-items: center; justify-content: space-around; border-block: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.assurance-line i { width: 4px; height: 4px; border-radius: 50%; background: var(--blue); }

.contact-section { padding: 132px 0 145px; background: var(--sky); }
.contact-grid { display: grid; grid-template-columns: 1fr .84fr; gap: 95px; }
.contact-copy .section-label { margin-bottom: 33px; }
.contact-copy > p { max-width: 570px; margin: 28px 0 0; color: var(--muted); font-size: 15px; line-height: 1.85; }
.contact-details { margin-top: 54px; display: grid; gap: 0; border-top: 1px solid var(--line); font-style: normal; }
.contact-details div { min-height: 74px; display: grid; grid-template-columns: 90px 1fr; align-items: center; gap: 18px; border-bottom: 1px solid var(--line); }
.contact-details small { color: #59657f; font-size: 11px; letter-spacing: .08em; }
.contact-details a, .contact-details span { font-size: 14px; overflow-wrap: anywhere; }
.contact-details a:hover { color: var(--blue); }
.project-form { padding: 32px; border: 1px solid var(--line); background: #fff; box-shadow: 0 25px 70px rgba(7,20,69,.08); }
.project-form label { display: flex; flex-direction: column; gap: 9px; margin-bottom: 19px; color: var(--muted); font-size: 11px; letter-spacing: .04em; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.project-form input, .project-form select, .project-form textarea { width: 100%; min-height: 48px; padding: 13px 14px; color: var(--ink); border: 1px solid var(--line); border-radius: 0; background: var(--paper); outline: none; font-size: 13px; line-height: 1.45; }
.project-form textarea { min-height: 124px; resize: vertical; }
.project-form input:focus, .project-form select:focus, .project-form textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 1px var(--blue); }
.project-form input::placeholder, .project-form textarea::placeholder { color: #9aa3b8; }
.project-form button { width: 100%; min-height: 53px; padding: 0 18px; display: flex; align-items: center; justify-content: space-between; color: #fff; border: 0; background: var(--blue); font-size: 13px; font-weight: 700; }
.project-form button:hover { background: var(--blue-bright); }
.project-form > p { min-height: 17px; margin: 13px 0 0; color: var(--muted); font-size: 10px; line-height: 1.6; }

.site-footer { padding-top: 72px; color: #fff; background: var(--navy-deep); }
.footer-main { display: flex; align-items: center; justify-content: space-between; gap: 40px; padding-bottom: 62px; }
.footer-brand { display: flex; flex-direction: column; align-items: flex-start; gap: 13px; }
.footer-logo { width: 150px; height: 43px; padding: 0; background: #fff; }
.footer-brand p { margin: 0; color: rgba(255,255,255,.72); font-size: 11px; letter-spacing: .14em; }
.footer-statement { margin: 0; color: rgba(255,255,255,.7); font-size: clamp(16px, 2vw, 24px); font-weight: 700; line-height: 1.25; letter-spacing: .04em; }
.footer-main > a { padding: 9px 0; border-bottom: 1px solid rgba(255,255,255,.35); font-size: 11px; }
.footer-bottom { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 28px; border-top: 1px solid var(--line-dark); color: rgba(255,255,255,.72); font-size: 11px; letter-spacing: .07em; }
.footer-bottom a:hover { color: #fff; }
.icp-record { min-height: 48px; display: flex; align-items: center; justify-content: center; border-top: 1px solid var(--line-dark); color: rgba(255,255,255,.72); font-size: 11px; letter-spacing: .05em; text-align: center; }
.icp-record a:hover { color: #fff; }

@keyframes rotate { to { transform: translate(-50%, -50%) rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; } }

@media (max-width: 1000px) {
  .nav-links { gap: 20px; }
  .hero { grid-template-columns: 1fr; gap: 38px; }
  .hero-copy { max-width: 650px; }
  .hero h1 { font-size: clamp(45px, 6vw, 63px); }
  .hero-stage { min-height: 520px; }
  .about-layout { gap: 52px; }
  .human-ai-grid { grid-template-columns: 1fr 1fr; }
  .human-ai-title { grid-column: 1 / -1; padding-right: 0; }
  .contact-grid { gap: 48px; }
}

@media (max-width: 820px) {
  .page-width { width: min(100% - 36px, 680px); }
  .nav-links { display: none; }
  .hero { grid-template-columns: 1fr; padding-top: 68px; }
  .hero-copy { max-width: 650px; }
  .hero-stage { min-height: 550px; }
  .about-layout, .workflow-intro, .contact-grid { grid-template-columns: 1fr; gap: 44px; }
  .section-heading { align-items: flex-start; flex-direction: column; gap: 24px; }
  .section-heading > p { width: min(100%, 560px); }
  .scope-art { height: 330px; }
  .workflow-grid { grid-template-columns: repeat(3, 1fr); row-gap: 56px; }
  .workflow-grid article:nth-child(3n)::after { display: none; }
  .footer-main { flex-wrap: wrap; }
  .footer-statement { order: 3; width: 100%; }
}

@media (max-width: 600px) {
  .page-width { width: calc(100% - 32px); }
  .nav-shell { min-height: 72px; }
  .logo-viewport { width: 122px; height: 37px; }
  .nav-cta { min-height: 40px; padding: 0 12px; gap: 10px; font-size: 10px; }
  .hero { min-height: 0; padding: 58px 0 82px; }
  .hero h1 { font-size: 42px; }
  .hero-copy > p { font-size: 15px; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .primary-action, .secondary-action { width: 100%; }
  .hero-stage { min-height: 460px; margin-top: 12px; }
  .hero-stage::before { font-size: 102px; }
  .orbit-large { width: 390px; height: 390px; }
  .orbit-small { width: 280px; height: 280px; }
  .vertical-frame { width: 190px; height: 334px; }
  .stage-note { padding: 11px 12px; }
  .note-bottom { right: 12px; bottom: 13px; }
  .note-top { left: 12px; top: 13px; }
  .about-section, .services-section, .principles-section, .contact-section, .scope-section, .workflow-section { padding-block: 94px; }
  .principle-cards { grid-template-columns: 1fr; }
  .principle-cards article, .principle-cards article + article { padding: 22px 0; border-left: 0; border-bottom: 1px solid var(--line); }
  .scope-grid, .services-grid, .human-ai-grid { grid-template-columns: 1fr; }
  .scope-grid { gap: 48px; }
  .scope-art { height: 430px; }
  .services-grid article { min-height: 285px; }
  .human-ai-title { grid-column: auto; }
  .workflow-grid { grid-template-columns: 1fr 1fr; }
  .workflow-grid article:nth-child(3n)::after { display: block; }
  .workflow-grid article:nth-child(2n)::after { display: none; }
  .assurance-line { align-items: flex-start; flex-direction: column; gap: 13px; padding-block: 22px; }
  .assurance-line i { display: none; }
  .field-row { grid-template-columns: 1fr; gap: 0; }
  .project-form { padding: 22px; }
  .contact-details div { grid-template-columns: 1fr; gap: 7px; padding: 16px 0; }
  .footer-main { align-items: flex-start; flex-direction: column; }
  .footer-bottom { min-height: 100px; align-items: flex-start; flex-direction: column; justify-content: center; gap: 8px; }
}