:root { color-scheme: light; font-family: -apple-system, BlinkMacSystemFont, 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif; color: #111; background: #fff; font-synthesis: none; -webkit-font-smoothing: antialiased; }
* { box-sizing: border-box; }
body { margin: 0; }
body.dialog-open { overflow: hidden; }
[hidden] { display: none !important; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button { border: 0; background: none; color: inherit; cursor: pointer; }
button, a { -webkit-tap-highlight-color: transparent; }
button:focus-visible, a:focus-visible, input:focus-visible { outline: 2px solid #8a6748; outline-offset: 5px; }
button:disabled { opacity: .5; cursor: wait; }
.skip-link { position: fixed; z-index: 100; top: -80px; left: 20px; background: #111; color: #fff; padding: 14px; }
.skip-link:focus { top: 12px; }
.page-header { position: absolute; top: 0; left: 0; right: 0; z-index: 4; display: flex; align-items: center; justify-content: space-between; gap: 24px; max-width: 1328px; margin: auto; padding: 28px 52px; }
.brand { display: inline-flex; align-items: baseline; font-size: 26px; font-weight: 650; letter-spacing: -.04em; white-space: nowrap; }
.brand span { font-size: 20px; margin-left: 2px; }
.page-header nav { display: flex; align-items: center; gap: 28px; font-size: 14px; }
.page-header nav > a { display: inline-flex; min-height: 44px; align-items: center; white-space: nowrap; }
.contact-button { display: inline-flex; align-items: center; justify-content: space-between; gap: 28px; min-height: 48px; padding: 12px 22px; border-radius: 28px; color: #fff; background: #111; }
.mobile-label { display: none; }
.exchange-hero { display: grid; grid-template-columns: minmax(0, 43%) minmax(0, 57%); align-items: center; width: 100%; min-height: 100svh; padding: 112px 0 50px; overflow: clip; }
.exchange-hero-copy { position: relative; z-index: 3; min-width: 0; padding: 0 24px 0 max(56px, calc((100vw - 1328px) / 2)); }
.exchange-hero h1 { margin: 0; font-size: clamp(38px, 4.15vw, 64px); line-height: 1.16; font-weight: 650; letter-spacing: -.035em; }
.exchange-hero h1 > span { display: block; }
.title-break { display: none; }
.project-label { display: flex; flex-wrap: wrap; gap: 6px 12px; margin: 24px 0 0; color: #707070; font-size: 12px; line-height: 1.6; }
.project-label > span { white-space: nowrap; }
.intro-copy { margin: 12px 0 0; font-size: clamp(17px, 1.4vw, 20px); line-height: 1.7; color: #555; }
.exchange-entry { width: 100%; max-width: 340px; margin-top: 28px; }
.exchange-launch { display: flex; align-items: center; justify-content: space-between; gap: 12px; width: 100%; min-height: 56px; padding: 14px 20px; border-radius: 12px; background: #111; color: #fff; font-size: 15px; white-space: nowrap; }
.exchange-launch:hover, .contact-button:hover, .dialog-action:hover { background: #333; }
.exchange-launch svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.7; }
.exchange-connection { display: flex; align-items: center; justify-content: space-between; gap: 8px; min-height: 44px; margin-top: 4px; color: #707070; font-size: 12px; line-height: 1.6; }
.exchange-connection > span { min-width: 0; overflow-wrap: anywhere; }
.exchange-connection button { display: grid; place-items: center; flex: 0 0 44px; width: 44px; height: 44px; border-radius: 8px; padding: 0; }
.exchange-connection button:hover { color: #111; background: #f3f3f3; }
.exchange-connection svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.5; }
.capability-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; width: 100%; max-width: 340px; margin-top: 16px; border-top: 1px solid #ddd; }
.capability-trigger { display: flex; align-items: center; justify-content: space-between; width: 100%; min-width: 0; min-height: 52px; padding: 12px 0; border-bottom: 1px solid #ddd; text-align: left; color: #333; font-size: 14px; }
.capability-trigger > span { font-size: 24px; line-height: 1; font-weight: 300; color: #777; }
.capability-trigger:hover { border-color: #777; }
.related-link { display: inline-flex; align-items: center; gap: 16px; min-height: 44px; margin-top: 14px; font-size: 12px; color: #777; }
.exchange-phone-scene { position: relative; min-width: 0; width: 100%; height: calc(100svh - 162px); min-height: 480px; max-height: 850px; }
.load-panel { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 12px; padding: 24px; background: #101010; color: #ddd; text-align: center; font-size: 13px; line-height: 1.7; }
.load-panel button { min-height: 44px; padding: 10px 20px; border: 1px solid #555; border-radius: 10px; }
.loading-mark { display: block; width: 22px; height: 22px; border: 2px solid #444; border-top-color: #e7cfb2; border-radius: 50%; animation: loading-spin .8s linear infinite; }
@keyframes loading-spin { to { transform: rotate(360deg); } }
.capability-dialog { width: min(640px, calc(100% - 36px)); max-height: calc(100dvh - 48px); padding: 0; border: 1px solid #dedede; border-radius: 20px; overflow-y: auto; overscroll-behavior: contain; color: #111; background: #fff; }
.capability-dialog::backdrop { background: rgb(0 0 0 / .4); }
.capability-dialog[data-motion] { transform-origin: 50% 45%; }
.capability-dialog[data-motion="open"]::backdrop { animation: capability-backdrop-in 280ms ease-out both; }
.capability-dialog[data-motion="closing"]::backdrop { animation: capability-backdrop-out 180ms ease-in both; }
@keyframes capability-backdrop-in { from { opacity: var(--capability-backdrop-start, 0); } to { opacity: 1; } }
@keyframes capability-backdrop-out { from { opacity: var(--capability-backdrop-start, 1); } to { opacity: 0; } }
.dialog-head { position: sticky; top: 0; z-index: 1; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 28px 32px 20px; border-bottom: 1px solid #e6e6e6; background: #fff; }
.eyebrow { margin: 0 0 8px; color: #777; font-size: 12px; line-height: 1.5; }
.dialog-head h2 { margin: 0; font-size: 28px; font-weight: 550; line-height: 1.35; letter-spacing: -.035em; }
.dialog-close { flex: 0 0 44px; width: 44px; height: 44px; border-radius: 50%; background: #f3f3f3; color: #222; font-size: 28px; line-height: 1; }
.dialog-close:hover { background: #e8e8e8; }
.dialog-content { padding: 22px 32px 30px; }
.dialog-intro { margin: 0 0 12px; color: #666; font-size: 14px; line-height: 1.8; }
.capability-list { margin: 0; padding: 0; list-style: none; counter-reset: capability; }
.capability-list li { position: relative; padding: 20px 0 20px 36px; border-bottom: 1px solid #e6e6e6; counter-increment: capability; }
.capability-list li::before { content: "0" counter(capability); position: absolute; top: 22px; left: 0; color: #888; font-size: 11px; line-height: 1.8; }
.capability-list h3 { margin: 0 0 8px; color: #222; font-size: 16px; font-weight: 550; line-height: 1.6; }
.capability-list small { display: inline-block; margin-left: 8px; color: #777; font-size: 11px; white-space: nowrap; font-weight: 400; }
.capability-list p { margin: 0; color: #666; font-size: 14px; line-height: 1.85; overflow-wrap: anywhere; }
.dialog-action { display: flex; align-items: center; justify-content: space-between; gap: 16px; width: 100%; min-height: 52px; margin-top: 24px; padding: 12px 18px; border-radius: 10px; background: #111; color: #fff; font-size: 14px; }
.brand-field { display: block; margin: 24px 0; font-size: 14px; }
.brand-field > span { float: right; color: #777; font-size: 12px; }
.brand-field input { display: block; width: 100%; min-height: 48px; margin-top: 10px; padding: 12px 14px; border: 1px solid #bbb; background: #fff; color: #111; border-radius: 8px; }
fieldset { border: 0; padding: 0; margin: 28px 0 0; }
legend { padding: 0 0 12px; font-size: 13px; color: #666; }
fieldset label { display: flex; align-items: flex-start; gap: 12px; padding: 16px 0; border-top: 1px solid #e5e5e5; font-size: 15px; cursor: pointer; }
fieldset input { width: 18px; height: 18px; flex: none; margin: 2px 0 0; accent-color: #111; }
fieldset small { display: block; margin-top: 6px; color: #777; font-size: 12px; line-height: 1.6; }
.project-actions { display: flex; align-items: center; gap: 22px; margin-top: 18px; }
.project-actions .dialog-action { width: auto; flex: 1; margin: 0; }
#copy-project { min-height: 44px; font-size: 14px; padding: 8px 4px; }
#project-status { margin: 16px 0 0; color: #777; font-size: 12px; line-height: 1.7; overflow-wrap: anywhere; }
#project-status.error { color: #a43b32; }
@media (max-width:1100px) and (min-width:701px) { .exchange-hero-copy { padding-left: 38px; padding-right: 18px; } }
@media (max-width:900px) { .title-break { display: inline; } .capability-actions { grid-template-columns: 1fr; gap: 0; } .page-header { padding: 24px 32px; } .page-header nav { gap: 18px; } }
@media (max-width:700px) {
  .page-header { padding: 16px 18px; gap: 16px; }
  .brand { font-size: 22px; }
  .page-header nav { gap: 14px; font-size: 11px; }
  .page-header .standalone, .desktop-label { display: none; }
  .mobile-label { display: inline; }
  .contact-button { min-height: 40px; padding: 10px 14px; gap: 12px; font-size: 11px; }
  .exchange-hero { padding: 88px 0 52px; }
  .exchange-hero-copy { padding: 0 8px 0 18px; }
  .exchange-hero h1 { font-size: clamp(24px, 7.3vw, 48px); line-height: 1.18; }
  .project-label { flex-direction: column; gap: 2px; margin-top: 16px; font-size: 11px; }
  .intro-copy { font-size: clamp(11px, 2.9vw, 17px); line-height: 1.7; }
  .exchange-entry { margin-top: 20px; }
  .exchange-launch { min-height: 48px; padding: 12px; border-radius: 10px; font-size: clamp(11px,3vw,14px); }
  .exchange-launch svg { width: 16px; height: 16px; }
  .exchange-connection { gap: 4px; margin-top: 0; font-size: 10px; }
  .capability-actions { margin-top: 12px; }
  .capability-trigger { min-height: 48px; font-size: 12px; }
  .related-link { margin-top: 12px; gap: 8px; font-size: 11px; }
  .exchange-phone-scene { height: calc(100svh - 160px); min-height: 400px; max-height: 586px; }
  .capability-dialog { width: calc(100% - 24px); max-height: calc(100dvh - 32px); border-radius: 16px; }
  .dialog-head { padding: 20px; }
  .dialog-head h2 { font-size: 25px; }
  .dialog-content { padding: 18px 20px 24px; }
  .capability-list li { padding-left: 28px; }
  .capability-list h3 { font-size: 15px; }
  .capability-list small { margin-left: 4px; }
}
@media (max-width:359px) { .page-header { padding-inline: 14px; gap: 8px; } .brand { font-size: 20px; } .page-header nav { gap: 8px; } .page-header nav > a { font-size: 10px; } .contact-button { padding-inline: 10px; gap: 8px; } .exchange-hero-copy { padding-left: 14px; padding-right: 6px; } .exchange-hero h1 { font-size: 24px; } .capability-trigger { font-size: 11px; } .dialog-head h2 { font-size: 22px; } }
@media (prefers-reduced-motion:reduce) { .loading-mark { animation: none; } .capability-dialog[data-motion]::backdrop { animation-duration: 80ms; } }