/* Dark-blue presence. Independent scroll/pointer/rotation transforms.
   Layers: hero copy 2, header 20, progress 25, native dialog top layer. */
:root {
  color-scheme: light;
  --bg: #f4f6fa; --surface: #fff; --ink: #102644; --muted: #627187;
  --accent: #1a62c4; --line: #d8dfe9; --night: #061326;
  --max: 1440px; --gutter: clamp(28px, 5.8vw, 112px);
  --ease: cubic-bezier(.22, 1, .36, 1);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 112px; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: "SLF Sans", "Noto Sans SC", "Microsoft YaHei", "PingFang SC", -apple-system, BlinkMacSystemFont, system-ui, sans-serif; -webkit-font-smoothing: antialiased; }
body, button, a { -webkit-tap-highlight-color: transparent; }
main { overflow: clip; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; cursor: pointer; }
button, a { touch-action: manipulation; }
img { display: block; max-width: 100%; }
h1, h2, h3, p, figure { margin: 0; }
h2 { font-size: clamp(36px, 4.1vw, 64px); line-height: 1.3; letter-spacing: -.035em; font-weight: 600; }
h3 { font-weight: 600; }
p { color: var(--muted); font-size: 18px; line-height: 1.9; }
button:focus-visible, a:focus-visible, summary:focus-visible, [tabindex="0"]:focus-visible { outline: 2px solid #82b5ff; outline-offset: 6px; }
[hidden] { display: none !important; }
.section-shell { width: min(var(--max), calc(100% - var(--gutter) * 2)); margin-inline: auto; }
.section-space { padding-block: clamp(94px, 10vw, 156px); }
.eyebrow { margin-bottom: 25px; font-size: 15px; font-weight: 600; letter-spacing: .065em; color: var(--accent); }
.skip-link { position: fixed; top: 12px; left: 12px; z-index: 40; padding: 14px 20px; background: #fff; color: var(--night); transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }
.scroll-progress { position: fixed; z-index: 25; top: 0; left: 0; width: 100%; height: 2px; background: #8dbaff; transform: scaleX(0); transform-origin: left; pointer-events: none; }
.site-header { position: sticky; z-index: 20; top: 0; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 32px; height: 80px; width: 100%; padding-inline: max(var(--gutter), calc((100% - var(--max)) / 2)); border-bottom: 1px solid rgb(180 211 255 / .15); background: rgb(6 19 38 / .94); color: #f2f6ff; backdrop-filter: blur(20px); }
.site-header.is-scrolled { background: rgb(6 19 38 / .9); }
.brand-wordmark { display: inline-flex; align-items: center; gap: 15px; font-size: 25px; line-height: 1.4; letter-spacing: .015em; font-weight: 600; white-space: nowrap; }
.brand-divider { width: 1px; height: 21px; background: #5b7497; }
.brand-partner { font: inherit; letter-spacing: inherit; }
.nav { display: flex; justify-content: center; gap: clamp(18px, 2vw, 32px); }
.nav a { position: relative; padding: 12px 0; font-size: 14px; color: #c6d3e7; white-space: nowrap; transition: color .2s; }
.nav a::after { content: ""; position: absolute; bottom: 4px; left: 0; width: 100%; height: 1px; background: #9fc6ff; transform: scaleX(0); transform-origin: left; transition: transform .3s var(--ease); }
.nav a:hover { color: #fff; }
.nav a:hover::after { transform: scaleX(1); }
.header-cta { display: flex; align-items: center; gap: 18px; min-height: 44px; padding: 0 22px; color: #edf5ff; background: rgb(124 169 233 / .08); border: 1px solid rgb(178 209 255 / .28); border-radius: 999px; font-size: 14px; white-space: nowrap; transition: background .2s, transform .25s var(--ease); }
.header-cta:hover { background: rgb(124 169 233 / .2); transform: translateY(-1px); }
.menu-button { display: none; }
.hero { position: relative; isolation: isolate; overflow: clip; background: var(--night); color: #f1f6ff; }
.hero::before { content: ""; position: absolute; z-index: -1; inset: 0; background: radial-gradient(ellipse at 82% 50%, rgb(32 76 143 / .4), transparent 52%), linear-gradient(115deg, #061326 32%, #081a32); }
.hero::after { content: ""; position: absolute; z-index: -1; inset: auto -10% -180px 40%; height: 420px; background: radial-gradient(ellipse, rgb(48 104 185 / .1), transparent 68%); pointer-events: none; }
.hero-layout { position: relative; display: grid; grid-template-columns: minmax(0, .46fr) minmax(0, .54fr); align-items: center; min-height: min(840px, calc(100svh - 152px)); padding-block: clamp(56px, 7svh, 90px); }
.hero-copy { position: relative; z-index: 2; min-width: 0; }
.hero .eyebrow { display: flex; align-items: center; gap: 12px; margin-bottom: 34px; color: #92baff; font-size: 13px; letter-spacing: .11em; }
.hero .eyebrow > span { width: 20px; height: 1px; background: #7bafff; }
.hero h1 { font-size: clamp(46px, 5.25vw, 86px); line-height: 1.24; letter-spacing: -.035em; font-weight: 600; }
.hero-line { display: block; overflow: clip; padding-bottom: .04em; white-space: nowrap; }
.hero-line > span { display: inline-block; }
.hero-line:last-child { color: #a5c6f5; }
.hero-lead { max-width: 510px; margin-top: 30px; font-size: clamp(15px, 1.18vw, 18px); line-height: 1.95; color: #a9bbd3; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 32px; margin-top: 34px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 25px; min-height: 58px; padding: 0 29px; border-radius: 999px; font-size: 16px; font-weight: 600; white-space: nowrap; transition: transform .3s var(--ease), background .2s, box-shadow .3s; }
.button.primary { color: #fff; background: var(--accent); }
.button:hover { transform: translateY(-3px); box-shadow: 0 10px 28px rgb(22 60 115 / .15); }
.button:active { transform: scale(.98); }
.hero .button.primary { background: #edf4ff; color: #102440; }
.hero .button.primary:hover { background: #fff; box-shadow: 0 12px 40px rgb(157 199 255 / .12); }
.text-link { display: inline-flex; align-items: center; gap: 16px; padding: 8px 0; border: 0; background: none; font-size: 17px; font-weight: 500; color: var(--accent); }
.text-link span, .button span, .header-cta span { display: inline-block; transition: transform .3s var(--ease); }
.text-link:hover { color: #004f9e; }
.text-link:hover span, .button:hover span, .header-cta:hover span { transform: translate(3px, -1px); }
.hero .text-link { color: #c8dbf7; font-size: 16px; }
.hero .text-link:hover { color: #fff; }
.hero-visual { position: relative; align-self: stretch; min-width: 0; pointer-events: none; }
/* Column width owns the artwork size; short windows no longer shrink it. */
.hero-orbit { position: absolute; z-index: 1; width: 116%; aspect-ratio: 1; left: 54%; top: 50%; transform: translate(-50%, -50%); pointer-events: none; }
.orbit-scroll-layer, .orbit-pointer-layer { position: absolute; inset: 0; transform-origin: center; }
.orbit-halo { position: absolute; inset: 8%; border-radius: 50%; background: radial-gradient(circle at 46% 48%, rgb(96 154 238 / .16), rgb(25 69 132 / .12) 42%, transparent 70%); }
.orbit-lines { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
.orbit-rotation-layer { position: absolute; inset: 0; transform-origin: center; }
.orbit-rotator { transform-origin: center; }
.orbit-core { position: absolute; inset: 29%; display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 21px; border: 1px solid rgb(166 200 251 / .34); border-radius: 50%; background: radial-gradient(circle at 35% 23%, #29558c, #133963 45%, #0b2341 85%); box-shadow: inset 0 1px 3px rgb(211 231 255 / .25), inset 0 -25px 65px rgb(1 14 35 / .3), 0 0 95px rgb(45 107 198 / .15); text-align: center; }
.orbit-core::before { content: ""; position: absolute; inset: -8px; border: 1px solid rgb(171 207 255 / .08); border-radius: inherit; }
.orbit-core strong { font-size: clamp(22px, 2.2vw, 36px); font-weight: 600; letter-spacing: .01em; white-space: nowrap; }
.orbit-core strong > span { color: #719bd2; font-weight: 400; padding-inline: 4px; }
.orbit-core-kicker { color: #a3c0e8; font-size: clamp(11px, .87vw, 14px); letter-spacing: .14em; }
.orbit-core-rule { width: 32px; height: 1px; background: #517eae; }
.orbit-core-note { color: #8ba8cb; font: 400 clamp(7px, .56vw, 9px)/1.2 system-ui, sans-serif; letter-spacing: .17em; }
.hero-bottom { position: relative; z-index: 3; display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 72px; border-top: 1px solid rgb(182 210 249 / .14); }
.hero-scroll { display: flex; align-items: center; gap: 15px; color: #aebed4; font-size: 13px; }
.scroll-stem { display: grid; place-items: center; height: 28px; font-size: 25px; color: #e8f2ff; transition: transform .3s var(--ease); }
.hero-scroll:hover .scroll-stem { transform: translateY(4px); }
.hero-bottom > p { color: #8198b7; font-size: 12px; letter-spacing: .08em; }
.hero-bottom > p > span { margin-inline: 18px; color: #3d5576; }
.motion-toggle { display: inline-flex; align-items: center; gap: 10px; min-height: 42px; padding: 7px 0 7px 14px; border: 0; background: none; color: #aebed4; font-size: 12px; }
.motion-toggle:hover { color: #fff; }
.motion-toggle-icon { width: 9px; height: 10px; border-left: 2px solid currentColor; border-right: 2px solid currentColor; }
.motion-toggle[aria-pressed="true"] .motion-toggle-icon { width: 0; height: 0; border: 5px solid transparent; border-left: 8px solid currentColor; border-right: 0; }
.motion-toggle:disabled { opacity: .5; cursor: default; }
@media (max-width: 1100px) {
  .site-header { height: 78px; gap: 20px; }
  .brand-wordmark { font-size: 23px; gap: 11px; }
  .nav { gap: 16px; }
  .nav a { font-size: 13px; }
  .header-cta { font-size: 12px; padding-inline: 15px; gap: 9px; }
  .hero-layout { min-height: min(720px, calc(100svh - 150px)); padding-block: 56px; }
  .hero h1 { font-size: clamp(40px, 5.25vw, 57px); }
  .hero .eyebrow { font-size: 12px; margin-bottom: 26px; }
  .hero-actions { gap: 22px; }
  .hero .button { min-height: 53px; font-size: 14px; padding-inline: 24px; gap: 18px; }
  .hero .text-link { font-size: 14px; }
  .orbit-core { gap: 12px; }
  .hero-bottom > p { font-size: 11px; }
  .hero-bottom { min-height: 72px; }
  .hero-bottom > p > span { margin-inline: 10px; }
}
@media (max-width: 900px) {
  .site-header { grid-template-columns: auto 1fr; }
  .header-cta { display: none; }
  .nav { justify-content: flex-end; gap: 15px; }
  .hero h1 { font-size: clamp(35px, 5.1vw, 46px); }
  .hero-layout { grid-template-columns: minmax(0, .51fr) minmax(0, .49fr); min-height: 590px; }
  .hero-lead { font-size: 15px; }
  .hero-actions { gap: 15px; }
  .hero .button { padding-inline: 19px; }
  .orbit-core-kicker { font-size: 10px; }
  .orbit-core strong { font-size: 22px; }
  .orbit-core-note { font-size: 6px; letter-spacing: .1em; }
  .hero-bottom > p { display: none; }
}
@media (max-width: 680px) {
  :root { --gutter: 26px; }
  html { scroll-padding-top: 84px; }
  .site-header { height: 70px; }
  .brand-wordmark { font-size: 23px; }
  .menu-button { display: flex; gap: 10px; justify-self: end; border: 0; padding: 10px 0; background: none; font-size: 14px; }
  .nav { display: none; position: absolute; top: 69px; left: 0; right: 0; padding: 20px var(--gutter) 28px; background: #08182c; border-bottom: 1px solid #233955; grid-template-columns: 1fr 1fr; gap: 10px 22px; }
  .nav.open { display: grid; }
  .nav a { font-size: 15px; }
  .hero-layout { grid-template-columns: 1fr; min-height: 0; padding-block: 56px 5px; }
  .hero h1 { font-size: clamp(32px, 8vw, 52px); line-height: 1.28; }
  .hero .eyebrow { font-size: 12px; margin-bottom: 26px; }
  .hero-lead { margin-top: 25px; font-size: 15px; }
  .hero-actions { margin-top: 27px; gap: 20px; }
  .hero-visual { height: clamp(300px, 94vw, 460px); margin-top: 12px; }
  .hero-orbit { width: min(470px, 132%); left: 50%; }
  .orbit-core { gap: 12px; }
  .orbit-core strong { font-size: 19px; }
  .orbit-core-note { font-size: 6px; }
  .hero-bottom { min-height: 72px; }
  .hero-scroll { font-size: 12px; }
  .section-space { padding-block: 82px; }
  h2 { font-size: clamp(32px, 8vw, 45px); }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .orbit-scroll-layer, .orbit-pointer-layer, .orbit-rotator { transform: none; }
  .orbit-rotation-layer { transform: none; }
}
@media (prefers-reduced-transparency: reduce) {
  .site-header { background: #061326; backdrop-filter: none; }
}