:root {
  --ink: #111820;
  --muted: #5f6b76;
  --line: #dce1e6;
  --blue: #006eff;
  --teal: #13b8a6;
  --paper: #f5f7f9;
  --white: #fff;
  --max: 1240px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif; background: var(--white); letter-spacing: 0; }
button, input, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; }

.site-header { position: fixed; inset: 0 0 auto; z-index: 20; height: 72px; display: flex; align-items: center; padding: 0 max(28px, calc((100vw - var(--max)) / 2)); color: #fff; border-bottom: 1px solid rgba(255,255,255,.18); transition: background .25s, color .25s, box-shadow .25s; }
.site-header.scrolled { color: var(--ink); background: rgba(255,255,255,.96); box-shadow: 0 8px 30px rgba(17,24,32,.08); backdrop-filter: blur(12px); }
.brand { display: inline-flex; align-items: center; gap: 8px; white-space: nowrap; }
.brand strong { font-size: 21px; font-weight: 700; }
.brand > span:last-child { margin-left: 4px; padding-left: 12px; border-left: 1px solid currentColor; font-size: 13px; font-weight: 600; }
.brand-mark { width: 30px; height: 23px; display: flex; align-items: center; justify-content: center; transform: skewX(-24deg); overflow: hidden; }
.brand-mark i { display: block; width: 9px; height: 23px; margin: 0 1px; background: currentColor; transform: skewX(24deg); }
.brand-mark i:first-child { height: 15px; align-self: flex-end; }
.brand-mark i:last-child { height: 10px; align-self: flex-start; }
.desktop-nav { margin: 0 auto; display: flex; height: 100%; align-items: center; gap: 40px; }
.desktop-nav a { position: relative; font-size: 14px; opacity: .9; }
.desktop-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -12px; height: 2px; background: var(--blue); transition: right .2s; }
.desktop-nav a:hover::after { right: 0; }
.header-actions { display: flex; align-items: center; gap: 14px; }
.icon-button, .menu-button { width: 40px; height: 40px; border: 0; color: inherit; background: transparent; display: grid; place-items: center; }
.icon-button svg { width: 21px; fill: none; stroke: currentColor; stroke-width: 1.7; }
.menu-button { display: none; gap: 4px; align-content: center; }
.menu-button span { width: 21px; height: 1px; background: currentColor; }
.mobile-nav { display: none; }

.primary { min-height: 48px; padding: 0 24px; border: 1px solid var(--blue); color: #fff; background: var(--blue); border-radius: 2px; font-weight: 600; transition: transform .2s, background .2s; }
.primary:hover { transform: translateY(-2px); background: #005bd4; }
.primary.small { min-height: 38px; padding: 0 18px; }
.site-header:not(.scrolled) .primary.small { color: var(--ink); background: #fff; border-color: #fff; }

.hero { position: relative; min-height: 760px; height: 92vh; max-height: 980px; display: flex; align-items: center; overflow: hidden; color: #fff; background: #141b22; }
.hero-image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 50% 42%; filter: saturate(.75) contrast(1.05); transform: scale(1.015); }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(4,12,20,.92) 0%, rgba(4,12,20,.72) 42%, rgba(4,12,20,.18) 72%, rgba(4,12,20,.1) 100%), linear-gradient(0deg, rgba(4,12,20,.6), transparent 48%); }
.hero-grid { position: absolute; inset: 0; opacity: .16; background-image: linear-gradient(rgba(255,255,255,.16) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.16) 1px, transparent 1px); background-size: 72px 72px; mask-image: linear-gradient(90deg,#000,transparent 70%); }
.hero-content { position: relative; z-index: 2; width: min(var(--max), calc(100% - 56px)); margin: 58px auto 0; }
.eyebrow, .section-index { margin: 0 0 20px; color: var(--blue); font-size: 12px; font-weight: 700; letter-spacing: 2px; }
.hero .eyebrow { color: #86baff; }
.hero h1 { margin: 0; max-width: 760px; font-size: clamp(52px, 6.3vw, 92px); line-height: 1.05; font-weight: 600; letter-spacing: 0; }
.hero-lead { max-width: 670px; margin: 30px 0 0; color: rgba(255,255,255,.8); font-size: 18px; line-height: 1.85; }
.hero-actions { margin-top: 36px; display: flex; align-items: center; gap: 32px; }
.text-link { display: inline-flex; align-items: center; gap: 16px; border: 0; padding: 0 0 7px; background: none; border-bottom: 1px solid currentColor; font-weight: 600; }
.text-link.light { color: #fff; }
.proof-strip { position: absolute; left: 0; top: calc(100% + 74px); display: flex; }
.proof-strip div { min-width: 190px; padding: 0 32px; border-left: 1px solid rgba(255,255,255,.3); }
.proof-strip div:first-child { padding-left: 0; border-left: 0; }
.proof-strip strong, .proof-strip span { display: block; }
.proof-strip strong { font-size: 25px; font-weight: 500; }
.proof-strip span { margin-top: 8px; color: rgba(255,255,255,.56); font-size: 12px; }
.scroll-cue { position: absolute; z-index: 2; right: max(28px, calc((100vw - var(--max)) / 2)); bottom: 38px; display: flex; align-items: center; gap: 14px; font-size: 11px; letter-spacing: 1px; color: rgba(255,255,255,.65); writing-mode: vertical-rl; }
.scroll-cue i { width: 1px; height: 50px; background: linear-gradient(#fff,transparent); animation: scroll 1.8s infinite; }
@keyframes scroll { 50% { transform: translateY(8px); opacity: .4; } }

.section { padding: 120px max(28px, calc((100vw - var(--max)) / 2)); }
.section-heading { display: grid; grid-template-columns: 1fr .72fr; gap: 80px; align-items: end; }
.section-heading h2, .architecture h2, .cta h2 { margin: 0; font-size: clamp(36px, 4.1vw, 58px); line-height: 1.25; font-weight: 600; }
.section-heading > p:last-child, .section-heading.split > p { margin: 0 0 5px; color: var(--muted); font-size: 16px; line-height: 1.9; }
.solution-list { margin-top: 72px; border-top: 1px solid var(--line); }
.solution-row { min-height: 210px; display: grid; grid-template-columns: 48px 80px 1fr 54px; gap: 28px; align-items: center; border-bottom: 1px solid var(--line); transition: background .25s, padding .25s; }
.solution-row:hover { padding: 0 18px; background: var(--paper); }
.row-number { align-self: start; padding-top: 34px; color: #9ca5ae; font-size: 11px; }
.row-icon { width: 58px; height: 58px; display: grid; place-items: center; color: #fff; font-size: 30px; }
.row-icon.blue { background: var(--blue); }.row-icon.teal { background: var(--teal); }.row-icon.amber { background: #e99a25; }
.row-copy h3 { margin: 0 0 13px; font-size: 25px; font-weight: 600; }
.row-copy p { margin: 0; color: var(--muted); line-height: 1.7; }
.row-copy ul { display: flex; gap: 26px; margin: 18px 0 0; padding: 0; list-style: none; color: #38444f; font-size: 13px; }
.row-copy li::before { content: ""; display: inline-block; width: 5px; height: 5px; margin: 0 8px 2px 0; background: var(--blue); }
.circle-link { width: 48px; height: 48px; border-radius: 50%; border: 1px solid #b9c1c8; color: var(--ink); background: transparent; font-size: 21px; transition: all .2s; }
.circle-link:hover { color: #fff; background: var(--blue); border-color: var(--blue); transform: rotate(45deg); }

.dark { position: relative; min-height: 740px; padding-top: 0; padding-bottom: 0; color: #fff; background: #0d151d; display: grid; grid-template-columns: 43% 57%; }
.dark-media { position: absolute; inset: 0 auto 0 0; width: 43%; overflow: hidden; }
.dark-media img { width: 100%; height: 100%; object-fit: cover; opacity: .55; filter: saturate(.55); }
.dark-media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg,rgba(5,12,18,.22),#0d151d 100%); }
.capability-content { position: relative; grid-column: 2; padding: 100px 0 100px 9%; }
.capability-content .section-heading { display: block; }
.capability-content .section-index { color: #6ea7ef; }
.capability-grid { display: grid; grid-template-columns: 1fr 1fr; margin-top: 68px; border-top: 1px solid rgba(255,255,255,.16); border-left: 1px solid rgba(255,255,255,.16); }
.capability-grid article { min-height: 190px; padding: 28px; border-right: 1px solid rgba(255,255,255,.16); border-bottom: 1px solid rgba(255,255,255,.16); }
.capability-grid span { color: #6ea7ef; font-size: 11px; }
.capability-grid h3 { margin: 26px 0 10px; font-size: 20px; }
.capability-grid p { margin: 0; color: rgba(255,255,255,.57); font-size: 13px; line-height: 1.7; }

.section-heading.split { grid-template-columns: 1.25fr .6fr; }
.case-feature { position: relative; min-height: 530px; margin-top: 70px; display: flex; align-items: flex-end; overflow: hidden; color: #fff; background: #111; }
.case-feature > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: opacity .3s, transform .5s; }
.case-feature:hover > img { transform: scale(1.02); }
.case-overlay { position: absolute; inset: 0; background: linear-gradient(90deg,rgba(6,15,23,.9),rgba(6,15,23,.35) 65%,transparent), linear-gradient(0deg,rgba(6,15,23,.65),transparent 60%); }
.case-copy { position: relative; z-index: 2; max-width: 680px; padding: 54px; }
.case-tag { display: inline-block; padding: 7px 11px; color: #9ec7ff; border: 1px solid rgba(158,199,255,.5); font-size: 11px; }
.case-copy h3 { margin: 22px 0 16px; font-size: 34px; line-height: 1.4; }
.case-copy > p { max-width: 610px; margin: 0; color: rgba(255,255,255,.68); line-height: 1.8; }
.case-metrics { display: flex; gap: 45px; margin: 30px 0; color: rgba(255,255,255,.66); font-size: 12px; }
.case-metrics strong { margin-right: 8px; color: #fff; font-size: 25px; }
.case-tabs { display: grid; grid-template-columns: repeat(3,1fr); border-bottom: 1px solid var(--line); }
.case-tabs button { min-height: 96px; padding: 20px 28px; text-align: left; border: 0; border-right: 1px solid var(--line); border-bottom: 3px solid transparent; background: #fff; }
.case-tabs button:last-child { border-right: 0; }
.case-tabs strong, .case-tabs span { display: block; }
.case-tabs strong { font-size: 16px; }.case-tabs span { margin-top: 7px; color: var(--muted); font-size: 12px; }
.case-tabs button.active { border-bottom-color: var(--blue); background: var(--paper); }

.architecture { display: grid; grid-template-columns: .75fr 1.25fr; gap: 100px; align-items: center; background: var(--paper); }
.architecture-copy > p:not(.section-index) { margin: 26px 0; color: var(--muted); line-height: 1.9; }
.architecture-map { padding: 32px; background: #fff; border: 1px solid var(--line); box-shadow: 0 25px 55px rgba(37,55,74,.08); }
.arch-layer { display: grid; grid-template-columns: repeat(4,1fr); gap: 9px; margin-bottom: 10px; }
.arch-layer span { min-height: 54px; display: grid; place-items: center; border: 1px solid #d5dde6; background: #f7f9fb; font-size: 12px; }
.arch-layer.platform { display: flex; min-height: 92px; align-items: center; justify-content: space-between; padding: 0 30px; color: #fff; background: var(--blue); }
.arch-layer.platform strong { font-size: 19px; }.arch-layer.platform small { opacity: .74; }
.arch-layer.services span { background: #e9f2ff; border-color: #c7dcfb; }
.arch-layer.infrastructure span { color: #d7e0e9; background: #17232e; border-color: #263542; }

.cta { padding: 85px max(28px, calc((100vw - var(--max)) / 2)); display: flex; align-items: center; justify-content: space-between; color: #fff; background: var(--blue); }
.cta .section-index { color: #c9e0ff; }.cta h2 { font-size: clamp(34px,4vw,54px); }
.primary.inverse { color: var(--blue); background: #fff; border-color: #fff; }
footer { min-height: 130px; padding: 0 max(28px, calc((100vw - var(--max)) / 2)); display: flex; align-items: center; gap: 40px; color: #aeb7bf; background: #0b1218; font-size: 12px; }
.footer-brand { color: #fff; } footer p { margin-right: auto; }

.search-panel { position: fixed; z-index: 40; inset: 0 0 auto; min-height: 190px; padding: 45px max(28px, calc((100vw - 860px)) / 2); display: flex; align-items: center; color: var(--ink); background: #fff; transform: translateY(-105%); transition: transform .3s; box-shadow: 0 16px 40px rgba(0,0,0,.15); }
.search-panel.open { transform: translateY(0); }
.search-panel form { width: 100%; }.search-panel label { display: block; margin-bottom: 14px; font-weight: 600; }
.search-panel form div { display: flex; }.search-panel input { min-width: 0; flex: 1; height: 50px; padding: 0 16px; border: 1px solid var(--line); }.search-panel form button { width: 90px; border: 0; color: #fff; background: var(--blue); }
.close-button { width: 42px; height: 42px; border: 0; color: currentColor; background: transparent; font-size: 28px; }
.search-panel > .close-button { align-self: flex-start; }
dialog { width: min(560px, calc(100% - 32px)); padding: 42px; border: 0; border-radius: 4px; color: var(--ink); box-shadow: 0 30px 90px rgba(0,0,0,.3); }
dialog::backdrop { background: rgba(4,10,16,.72); backdrop-filter: blur(4px); }
dialog > .close-button { position: absolute; top: 16px; right: 16px; }
dialog h2 { margin: 0 0 10px; font-size: 34px; } dialog > p:not(.section-index) { color: var(--muted); }
dialog form { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 28px; }
dialog form label { color: #4e5a65; font-size: 12px; }
dialog input, dialog select { width: 100%; height: 46px; margin-top: 7px; padding: 0 12px; border: 1px solid var(--line); background: #fff; }
dialog form .primary { grid-column: 1 / -1; margin-top: 6px; }
.success-message { padding: 45px 0 20px; text-align: center; }.success-message strong { color: var(--blue); font-size: 28px; }
.detail-dialog { width: min(620px,calc(100% - 32px)); }.detail-dialog > p:not(.section-index) { font-size: 16px; line-height: 1.9; }.detail-dialog .primary { margin-top: 18px; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s, transform .6s; }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 900px) {
  .desktop-nav, .header-actions .primary.small { display: none; }
  .header-actions { margin-left: auto; }.menu-button { display: grid; }
  .mobile-nav { position: absolute; top: 72px; left: 0; right: 0; padding: 18px 28px 28px; display: none; color: var(--ink); background: #fff; box-shadow: 0 20px 30px rgba(0,0,0,.12); }
  .mobile-nav.open { display: grid; gap: 20px; }.mobile-nav a { padding: 7px 0; border-bottom: 1px solid var(--line); }
  .hero { min-height: 720px; height: 92vh; }.hero-overlay { background: linear-gradient(90deg,rgba(4,12,20,.9),rgba(4,12,20,.42)),linear-gradient(0deg,rgba(4,12,20,.65),transparent); }
  .proof-strip { top: calc(100% + 60px); }.proof-strip div { min-width: 150px; padding: 0 20px; }
  .section-heading, .section-heading.split { grid-template-columns: 1fr; gap: 26px; }
  .dark { min-height: auto; display: block; padding: 90px 28px; }.dark-media { width: 100%; opacity: .32; }.capability-content { padding: 0; }
  .architecture { grid-template-columns: 1fr; gap: 60px; }
  .cta { gap: 50px; }
}

@media (max-width: 640px) {
  .site-header { height: 64px; padding: 0 18px; }.mobile-nav { top: 64px; }
  .brand strong { font-size: 18px; }.brand-mark { width: 26px; }.icon-button { width: 36px; }
  .hero { min-height: 700px; height: 88vh; }.hero-content { width: calc(100% - 36px); margin-top: 25px; }
  .hero h1 { font-size: 46px; }.hero-lead { font-size: 15px; line-height: 1.8; }.hero-actions { align-items: flex-start; flex-direction: column; gap: 24px; }
  .proof-strip { position: static; margin-top: 52px; width: 100%; }.proof-strip div { min-width: 0; flex: 1; padding: 0 10px; }.proof-strip strong { font-size: 17px; }.proof-strip span { font-size: 10px; line-height: 1.4; }
  .scroll-cue { display: none; }.hero-grid { background-size: 48px 48px; }
  .section { padding: 82px 18px; }.section-heading h2, .architecture h2, .cta h2 { font-size: 34px; }
  .solution-list { margin-top: 45px; }.solution-row { padding: 28px 0; grid-template-columns: 44px 1fr 44px; gap: 15px; }.solution-row:hover { padding: 28px 8px; }
  .row-number { display: none; }.row-icon { width: 44px; height: 44px; font-size: 22px; }.row-copy h3 { font-size: 20px; }.row-copy p { font-size: 13px; }.row-copy ul { flex-wrap: wrap; gap: 8px 14px; }.circle-link { width: 42px; height: 42px; }
  .dark { padding: 82px 18px; }.capability-grid { grid-template-columns: 1fr; }.capability-grid article { min-height: 155px; }
  .case-feature { min-height: 590px; margin-top: 46px; }.case-copy { padding: 28px 22px; }.case-copy h3 { font-size: 27px; }.case-metrics { gap: 18px; }.case-metrics span { display: flex; flex-direction: column; }.case-metrics strong { font-size: 21px; }
  .case-tabs { grid-template-columns: 1fr; }.case-tabs button { min-height: 74px; border-right: 0; border-bottom: 1px solid var(--line); border-left: 3px solid transparent; }.case-tabs button.active { border-left-color: var(--blue); border-bottom-color: var(--line); }
  .architecture-map { padding: 16px; overflow: hidden; }.arch-layer { gap: 4px; }.arch-layer span { min-height: 46px; padding: 4px; font-size: 9px; text-align: center; }.arch-layer.platform { min-height: 76px; padding: 0 14px; }.arch-layer.platform strong { font-size: 15px; }.arch-layer.platform small { font-size: 9px; }
  .cta { padding: 70px 18px; flex-direction: column; align-items: flex-start; }.cta br { display: none; }
  footer { padding: 36px 18px; flex-direction: column; align-items: flex-start; gap: 12px; } footer p { margin: 0; }
  .search-panel { min-height: 170px; padding: 35px 18px; }.search-panel > .close-button { position: absolute; top: 10px; right: 8px; }
  dialog { padding: 34px 22px; } dialog form { grid-template-columns: 1fr; } dialog form .primary { grid-column: auto; }
}

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