:root {
  color-scheme: dark;
  --night: #07171d;
  --night-2: #0b2229;
  --panel: #102c33;
  --ink: #f5f6f1;
  --muted: #b4c5c5;
  --line: #315158;
  --aqua: #17c7c9;
  --aqua-soft: #7ce7e2;
  --ember: #ff8b3d;
  --max: 1200px;
  --header-height: 72px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 16px); }
body { margin: 0; background: var(--night); color: var(--ink); font: 16px/1.6 Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; }
body.menu-open { overflow: hidden; }
a { color: inherit; }
button, textarea { font: inherit; }
button { color: inherit; }
.wrap { width: min(var(--max), calc(100% - 56px)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 20; top: 8px; left: 8px; transform: translateY(-160%); padding: 10px 14px; background: var(--aqua); color: var(--night); font-weight: 750; }
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid var(--ember); outline-offset: 4px; }
[id] { scroll-margin-top: calc(var(--header-height) + 16px); }

.site-header { position: sticky; z-index: 10; top: 0; height: var(--header-height); background: rgb(7 23 29 / 96%); border-bottom: 1px solid var(--line); backdrop-filter: blur(14px); }
.header-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; min-width: max-content; text-decoration: none; }
.brand img { width: 42px; height: 42px; border: 2px solid #fffdf7; border-radius: 50%; background: #fffdf7; object-fit: cover; }
.brand-name { font-size: 19px; line-height: 1.05; font-weight: 850; letter-spacing: .03em; }
.brand-caption { display: block; margin-top: 5px; color: var(--muted); font-size: 8px; font-weight: 650; letter-spacing: .13em; }
.desktop-nav { display: flex; align-items: center; gap: 22px; color: #d0dddd; font-size: 13px; }
.desktop-nav > a:not(.button), .community-nav > a { text-decoration: none; }
.desktop-nav a:hover, .mobile-nav a:hover { color: var(--aqua-soft); }
.desktop-nav [aria-current="page"] { color: var(--aqua-soft); }
.community-nav { position: relative; display: inline-flex; align-items: center; gap: 2px; }
.nav-disclosure { width: 34px; height: 40px; display: grid; place-items: center; border: 0; background: transparent; cursor: pointer; color: var(--muted); font-size: 17px; }
.nav-disclosure[aria-expanded="true"] { color: var(--aqua-soft); }
.nav-popover { position: absolute; top: calc(100% + 15px); left: -20px; width: 340px; padding: 10px; background: #0b2229; border: 1px solid var(--line); box-shadow: 0 22px 50px #0008; }
.area-nav-link { display: flex; flex-direction: column; gap: 2px; padding: 12px 13px; border-bottom: 1px solid #25454b; text-decoration: none; }
.area-nav-link:last-child { border-bottom: 0; }
.area-nav-link span { font-weight: 720; }
.area-nav-link small { color: var(--muted); font-size: 11px; }
.button { min-height: 46px; display: inline-flex; align-items: center; justify-content: center; gap: 9px; padding: 0 17px; border: 1px solid var(--line); color: var(--ink); background: transparent; text-decoration: none; text-align: center; font-size: 12px; font-weight: 780; line-height: 1.3; transition: background-color .18s ease, border-color .18s ease, color .18s ease; }
.button:hover { border-color: var(--aqua-soft); color: var(--aqua-soft); }
.button-primary { border-color: var(--aqua); background: var(--aqua); color: #06191d; }
.button-primary:hover { border-color: #8af4ed; background: #8af4ed; color: #06191d; }
.button-disabled, .button-disabled:hover { border-color: #486064; background: #1b3035; color: #bdcccc; cursor: not-allowed; }
.desktop-nav .button { min-height: 40px; padding-inline: 13px; }
.language-switch { min-width: 44px; min-height: 44px; display: inline-grid; place-items: center; color: var(--ink); text-decoration: none; font-size: 12px; }
.mobile-controls { display: none; align-items: center; gap: 8px; }
.menu-toggle, .menu-close { min-width: 44px; min-height: 44px; display: inline-flex; align-items: center; justify-content: center; gap: 9px; border: 1px solid transparent; background: transparent; cursor: pointer; font-size: 12px; }
.menu-icon { width: 16px; height: 11px; display: inline-block; border-top: 1px solid currentColor; border-bottom: 1px solid currentColor; }
.mobile-backdrop { position: fixed; inset: var(--header-height) 0 0; z-index: 11; background: rgb(0 0 0 / 64%); }
.mobile-dialog { position: fixed; z-index: 12; inset: var(--header-height) 0 0 auto; width: min(430px, 100%); overflow-y: auto; padding: 20px 24px 36px; background: #0b2229; border-left: 1px solid var(--line); box-shadow: -20px 0 60px #0007; }
.mobile-dialog-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 22px; }
.mobile-dialog > .button { width: 100%; min-height: 48px; margin-bottom: 16px; }
.mobile-nav { display: flex; flex-direction: column; }
.mobile-nav > a, .mobile-nav summary { min-height: 50px; display: flex; align-items: center; border-bottom: 1px solid var(--line); text-decoration: none; cursor: pointer; }
.mobile-nav details summary { list-style: none; }
.mobile-nav details summary::-webkit-details-marker { display: none; }
.mobile-nav details summary::after { content: "+"; margin-left: auto; color: var(--aqua-soft); font-size: 19px; }
.mobile-nav details[open] summary::after { content: "−"; }
.mobile-area-links { display: grid; padding: 4px 0 10px 12px; }
.mobile-area-links .area-nav-link { padding: 10px 8px; }
[hidden] { display: none !important; }

.hero { min-height: 570px; display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(300px, .88fr); align-items: center; gap: 36px; padding-block: 60px 74px; }
.hero-copy { max-width: 690px; }
.eyebrow { margin: 0; color: var(--aqua-soft); font-size: 10px; font-weight: 820; letter-spacing: .19em; text-transform: uppercase; }
.hero h1 { max-width: 710px; margin: 21px 0 24px; font-size: clamp(53px, 6.6vw, 86px); font-weight: 670; letter-spacing: -.075em; line-height: .98; text-wrap: balance; }
.hero-intro { max-width: 650px; margin: 0; color: var(--muted); font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 11px; margin-top: 29px; }
.hero-signature { margin: 23px 0 0; color: #91aaab; font-size: 10px; letter-spacing: .09em; }
.network-art { position: relative; width: min(100%, 500px); margin-inline: auto; }
.network-art svg { display: block; width: 100%; height: auto; overflow: visible; }
.network-lines { fill: var(--aqua); stroke: #17c7c9a8; stroke-width: 1.5; }
.network-lines path { fill: none; }
.network-lines circle:nth-of-type(3n) { fill: var(--ember); stroke: #ff8b3d9c; }
.network-orbit { fill: none; stroke: #17c7c945; stroke-width: 1; stroke-dasharray: 2 8; }
.orbit-two { stroke: #ff8b3d40; stroke-dasharray: 1 7; }
.network-caption { position: absolute; right: 2%; bottom: 7%; padding: 8px 11px; color: #091a1f; background: var(--ember); font: 800 9px/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .1em; transform: rotate(-3deg); }

.content-section { display: grid; grid-template-columns: 185px minmax(0, 1fr); gap: 38px; padding-block: 76px; border-top: 1px solid var(--line); }
.content-section:nth-of-type(even) { background: transparent; }
.section-index { display: flex; flex-direction: column; gap: 13px; color: var(--aqua-soft); font: 10px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .08em; }
.section-index span:first-child { color: var(--ember); font-size: 13px; }
.section-main { min-width: 0; }
.section-heading-row { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; }
.section-main h2 { max-width: 800px; margin: -9px 0 17px; font-size: clamp(33px, 4.2vw, 57px); font-weight: 640; letter-spacing: -.065em; line-height: 1.04; text-wrap: balance; }
.section-copy { max-width: 760px; margin: 0; color: var(--muted); font-size: 15px; }
.status-tag { display: inline-flex; align-items: center; min-height: 29px; flex: 0 0 auto; padding: 3px 10px; border: 1px solid #517a7b; color: var(--aqua-soft); font-size: 10px; letter-spacing: .04em; }
.section-aside { padding-top: 3px; }
.card-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 28px; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.content-card { min-height: 130px; display: flex; flex-direction: column; gap: 8px; padding: 22px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.content-card h3 { margin: 0; color: var(--ink); font-size: 18px; font-weight: 690; letter-spacing: -.025em; }
.content-card p { margin: 0; }
.linked-card { text-decoration: none; transition: background-color .18s ease; }
.linked-card:hover { background: var(--panel); }
.card-title { display: flex; align-items: center; justify-content: space-between; gap: 15px; color: var(--ink); font-size: 18px; font-weight: 700; }
.card-title span { color: var(--aqua-soft); }
.section-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.venue-gallery { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-top: 28px; }
.venue-gallery figure { min-width: 0; margin: 0; }
.venue-gallery img { display: block; width: 100%; aspect-ratio: 1.4; border: 1px solid var(--line); object-fit: cover; background: #10262b; }
.venue-gallery figcaption { padding-top: 9px; color: var(--muted); font-size: 11px; line-height: 1.5; }
.media-credit { margin: 12px 0 0; color: #91aaab; font-size: 10px; }
.section-note { max-width: 730px; margin: 20px 0 0; color: var(--muted); font-size: 12px; }
.section-main > .button { margin-top: 23px; }
.section-cta { padding-block: 16px 76px; }
.section-cta .section-note { margin-top: 14px; }

.message-section { max-width: 850px; padding-block: 4px 92px; }
.message-label { display: block; margin-bottom: 9px; color: var(--aqua-soft); font-size: 11px; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
.message-section textarea { width: 100%; min-height: 110px; padding: 15px; resize: vertical; border: 1px solid var(--line); background: var(--night-2); color: var(--ink); }
.message-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
.message-status { min-height: 23px; margin: 9px 0 0; color: var(--aqua-soft); font-size: 12px; }
.contact-form { padding: clamp(18px, 3vw, 30px); border: 1px solid var(--line); background: linear-gradient(145deg, #10262b, #0a1b20); }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.form-field { display: grid; gap: 8px; }
.form-field-wide { grid-column: 1 / -1; }
.form-field label { color: var(--ink); font-size: 13px; font-weight: 700; }
.form-field label span { color: var(--ember); }
.form-field input, .form-field select, .form-field textarea { width: 100%; min-height: 46px; padding: 11px 13px; border: 1px solid #38545a; border-radius: 3px; background: #07171d; color: var(--ink); font: inherit; }
.form-field textarea { min-height: 145px; resize: vertical; }
.form-field input::placeholder, .form-field textarea::placeholder { color: #829895; }
.field-hint { color: var(--muted); font-size: 11px; }
.privacy-consent { display: flex; align-items: flex-start; gap: 10px; margin-top: 20px; color: var(--muted); font-size: 12px; line-height: 1.65; }
.privacy-consent input { flex: 0 0 auto; width: 16px; height: 16px; margin-top: 2px; accent-color: var(--aqua); }
.privacy-consent a { color: var(--aqua-soft); text-underline-offset: 3px; }
.form-trap { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.message-status[data-state="error"] { color: #ffb8a0; }
.message-status[data-state="success"] { color: var(--aqua-soft); }
.contact-form :focus-visible { outline: 2px solid var(--aqua); outline-offset: 3px; }
.site-footer { border-top: 1px solid var(--line); background: #061318; }
.footer-inner { display: grid; grid-template-columns: 90px 1fr auto; align-items: center; gap: 8px 28px; padding-block: 27px 32px; }
.footer-brand { color: var(--aqua-soft); font-weight: 850; letter-spacing: .08em; text-decoration: none; }
.footer-inner p { margin: 0; color: var(--muted); font-size: 11px; }
.footer-inner nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 15px; }
.footer-inner nav a { color: #c7d5d4; font-size: 11px; text-decoration: none; }
.footer-inner nav a:hover { color: var(--aqua-soft); }
.footer-inner small { grid-column: 1 / -1; color: #91a5a6; font-size: 10px; }
.error-page { width: min(720px, calc(100% - 40px)); min-height: 75vh; display: flex; flex-direction: column; align-items: flex-start; justify-content: center; margin: auto; }
.error-page h1 { margin: 20px 0 12px; font-size: clamp(44px, 7vw, 76px); letter-spacing: -.07em; }
.error-page p:not(.eyebrow) { max-width: 570px; color: var(--muted); }
.preview-fixture { border: 4px solid var(--ember); padding: 30px; }

@media (max-width: 1050px) {
  .desktop-nav { gap: 14px; }
  .desktop-nav > a:not(.button) { font-size: 12px; }
  .header-inner { width: min(var(--max), calc(100% - 40px)); }
}
@media (max-width: 900px) {
  :root { --header-height: 64px; }
  .desktop-nav { display: none; }
  .mobile-controls { display: flex; }
  .hero { min-height: 0; grid-template-columns: minmax(0, 1.1fr) minmax(240px, .9fr); padding-block: 58px 62px; }
  .hero h1 { font-size: clamp(48px, 7vw, 68px); }
  .network-caption { font-size: 8px; }
}
@media (max-width: 650px) {
  .wrap { width: calc(100% - 36px); }
  .brand-caption { display: none; }
  .brand img { width: 38px; height: 38px; }
  .brand-name { font-size: 17px; }
  .brand-caption { font-size: 7px; }
  .hero { display: flex; flex-direction: column; align-items: stretch; gap: 26px; padding-block: 47px 45px; }
  .hero h1 { max-width: 540px; margin: 17px 0 19px; font-size: clamp(43px, 11.2vw, 57px); line-height: 1.02; }
  .hero-intro { font-size: 15px; }
  .hero-signature { margin-top: 17px; }
  .network-art { width: min(88%, 360px); }
  .network-caption { right: -3%; bottom: 6%; }
  .content-section { grid-template-columns: 1fr; gap: 16px; padding-block: 48px; }
  .section-index { flex-direction: row; align-items: center; gap: 12px; }
  .section-main h2 { margin-top: 0; font-size: clamp(34px, 9vw, 43px); }
  .section-heading-row { flex-direction: column; gap: 4px; }
  .section-aside { padding: 0 0 13px; }
  .card-grid { grid-template-columns: 1fr; margin-top: 22px; }
  .content-card { min-height: 0; padding: 18px; }
  .venue-gallery { grid-template-columns: 1fr; }
  .section-cta { padding-block: 8px 54px; }
  .message-section { padding-bottom: 58px; }
  .form-grid { grid-template-columns: 1fr; }
  .form-field-wide { grid-column: auto; }
  .footer-inner { grid-template-columns: 1fr auto; gap: 12px; }
  .footer-inner p { grid-column: 1 / -1; grid-row: 2; }
  .footer-inner nav { grid-column: 1 / -1; grid-row: 3; justify-content: flex-start; }
  .footer-inner small { grid-column: 1 / -1; grid-row: 4; }
  .button { min-height: 46px; }
}
@media (max-width: 390px) {
  .wrap { width: calc(100% - 32px); }
  .brand-caption { display: none; }
  .header-inner { gap: 12px; }
  .brand { gap: 8px; }
  .hero h1 { font-size: 44px; }
  .hero-actions { gap: 8px; }
  .hero-actions .button { padding-inline: 12px; font-size: 11px; }
  .mobile-dialog { padding-inline: 20px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

/* A warmer, more human launch visual built around the SIAH eagle mark. */
.community-board { min-height: 445px; isolation: isolate; overflow: hidden; border: 1px solid #3a6265; background: radial-gradient(ellipse at 50% 44%, #164249 0, #0b252c 48%, #07171d 77%); }
.community-board::before { content: ""; position: absolute; inset: 7%; border: 1px solid #3dd6cf38; border-radius: 50%; transform: rotate(-18deg) scaleX(.76); }
.community-board::after { content: ""; position: absolute; inset: 14% 3%; border-top: 1px solid #ff8b3d38; border-bottom: 1px solid #17c7c936; border-radius: 50%; transform: rotate(34deg) scaleY(.62); }
.board-orbit { position: absolute; z-index: -1; border: 1px dashed #64d9d14a; border-radius: 50%; }
.board-orbit-one { inset: 12% 15%; transform: rotate(32deg) scaleY(.64); }
.board-orbit-two { inset: 21% 5%; border-color: #ff9b5a3b; transform: rotate(-31deg) scaleY(.55); }
.mascot-disc { position: absolute; z-index: 2; top: 17%; left: 50%; width: clamp(152px, 19vw, 210px); aspect-ratio: 1; display: grid; place-items: center; padding: 8px; border: 3px solid #f6f1e8; border-radius: 50%; background: #f6f1e8; box-shadow: 0 16px 54px #0008, 0 0 0 9px #17c7c91f; transform: translateX(-50%) rotate(-5deg); }
.mascot-disc img { width: 100%; height: 100%; border-radius: 50%; object-fit: cover; }
.board-place { position: absolute; z-index: 3; display: flex; align-items: center; gap: 7px; padding: 7px 9px; border: 1px solid #508286; color: #d4e8e4; background: #0a1b21eb; font: 800 8px/1 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .11em; }
.board-place i { color: var(--ember); font-style: normal; }
.board-place-shenzhen { top: 13%; left: 4%; transform: rotate(-5deg); }
.board-place-hongkong { top: 33%; right: 3%; transform: rotate(5deg); }
.board-sticker { position: absolute; z-index: 4; top: 12%; right: 12%; padding: 9px 12px; background: var(--ember); color: #07171d; font-size: 9px; font-weight: 900; letter-spacing: .06em; transform: rotate(8deg); box-shadow: 0 7px 20px #0006; }
.board-caption { position: absolute; z-index: 3; right: 5%; bottom: 24%; display: flex; flex-direction: column; gap: 3px; max-width: 230px; padding: 12px 15px; border-left: 2px solid var(--aqua); background: #07171de8; transform: rotate(-2deg); }
.board-caption strong { color: var(--ink); font-size: 12px; line-height: 1.35; }
.board-caption span { color: var(--muted); font-size: 9px; }
.board-route { position: absolute; z-index: 3; right: 5%; bottom: 7%; left: 5%; display: flex; align-items: center; justify-content: center; gap: 12px; min-height: 40px; border-top: 1px solid #315158; color: #b6ceca; font: 800 9px/1 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .17em; }
.board-route b { color: var(--ember); font-size: 14px; }
@media (max-width: 900px) {
  .community-board { min-height: 390px; }
  .mascot-disc { width: 170px; }
}
@media (max-width: 650px) {
  .community-board { width: min(100%, 410px); min-height: 365px; margin-inline: auto; }
  .mascot-disc { top: 16%; width: 160px; }
  .board-place-shenzhen { top: 12%; left: 1%; }
  .board-place-hongkong { top: 34%; right: 0; }
  .board-sticker { top: 11%; right: 8%; font-size: 8px; }
  .board-caption { right: 2%; bottom: 23%; max-width: 205px; }
  .board-route { bottom: 6%; gap: 8px; letter-spacing: .12em; }
}