.header{position:fixed;top:0;left:0;right:0;height:var(--header-height);background:var(--color-surface);box-shadow:0 1px 0 var(--color-outline);z-index:100}.header-inner{max-width:var(--max-width);margin:0 auto;height:100%;padding:0 20px;display:flex;align-items:center;justify-content:space-between}.header-logo{display:flex;align-items:center;height:44px}.header-logo-img{height:44px;width:auto;object-fit:contain}.header-nav{display:flex;gap:24px}.header-nav a{font-weight:500;color:var(--color-on-surface-variant);transition:color .2s}.header-nav a:hover{color:var(--color-primary)}.hero{position:relative;height:100vh;height:100dvh;min-height:100vh;padding-top:var(--header-height);box-sizing:border-box;display:flex;align-items:center;justify-content:center;overflow:hidden}.hero-bg{position:absolute;top:0;left:0;right:0;bottom:0;min-height:100%;background-color:var(--color-on-primary-container);background-image:url(/img/hero.png);background-size:cover;background-position:center;background-repeat:no-repeat;pointer-events:none;z-index:0}.hero-container{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;z-index:1}.hero-avatars{position:relative;width:100%;max-width:var(--max-width);height:100%;min-height:60vh;padding:0 24px;pointer-events:none}.hero-avatar-wrap{position:absolute;width:clamp(90px,14vw,160px);transition:left .35s ease-out,top .35s ease-out}.hero-avatar{width:100%;height:auto;border-radius:50%;box-shadow:0 8px 32px #00000040}.hero-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:#00000073;pointer-events:none;z-index:2}.hero-content{position:relative;z-index:3;text-align:center;max-width:560px;margin:0 auto;padding:0 24px}.hero-title{font-size:clamp(1.75rem,4vw,2.5rem);font-weight:700;color:#fff;line-height:1.2;margin-bottom:12px;text-shadow:0 1px 4px rgba(0,0,0,.4)}.hero-subtitle{font-size:1.1rem;color:#ffffffeb;text-shadow:0 1px 2px rgba(0,0,0,.3)}.description{padding:64px 24px;background:var(--color-surface)}.description-inner{max-width:var(--max-width);margin:0 auto}.description-title{font-size:1.75rem;font-weight:700;color:var(--color-on-surface);margin-bottom:16px}.description-lead{font-size:1.15rem;color:var(--color-on-surface-variant);margin-bottom:20px;font-weight:500}.description-text{color:var(--color-on-surface-variant);line-height:1.7}.exchange-flow{padding:64px 24px 72px;background:var(--color-background)}.exchange-flow-inner{max-width:var(--max-width);margin:0 auto}.exchange-flow-title{font-size:1.75rem;font-weight:700;color:var(--color-on-surface);margin-bottom:8px}.exchange-flow-lead{color:var(--color-on-surface-variant);margin-bottom:32px}.exchange-flow-desktop{display:block}.exchange-flow-row{display:flex;width:100%;max-width:960px;margin:0 auto;gap:24px}.exchange-flow-row--top{justify-content:space-between;margin-bottom:20px}.exchange-flow-row--bottom{justify-content:center;gap:24px;margin-top:20px}.exchange-flow-track{display:flex;align-items:center;justify-content:space-between;width:100%;max-width:960px;margin:0 auto;gap:16px}.exchange-flow-track-step{display:flex;align-items:center;flex:1 1 0}.exchange-flow-step-circle{width:56px;height:56px;border-radius:50%;border:2px solid var(--color-outline);background:var(--color-surface);display:flex;align-items:center;justify-content:center;transition:transform .2s ease-out,border-color .2s,background-color .2s,color .2s,box-shadow .2s}.exchange-flow-step-circle--completed{border-color:var(--color-primary);background:var(--color-primary-container);color:var(--color-primary)}.exchange-flow-step-circle--active{border-color:var(--color-primary);background:var(--color-primary-container);color:var(--color-primary);transform:scale(1.15);box-shadow:0 0 0 4px #4faf3d29}.exchange-flow-step-icon{width:60%;height:60%;object-fit:contain}.exchange-flow-connector{flex:1 1 auto;height:4px;margin-left:12px;border-radius:999px;background:var(--color-outline);transition:background-color .25s ease-out}.exchange-flow-connector--filled{background:var(--color-primary)}.exchange-flow-card{width:100%;max-width:30%;padding:14px 14px 16px;border-radius:var(--radius);border:1px solid transparent;background:var(--color-surface);color:var(--color-on-surface-variant);transition:border-color .2s ease-out,background-color .2s ease-out,box-shadow .2s ease-out}.exchange-flow-card--active{border-color:var(--color-primary);background:var(--color-primary-container);box-shadow:0 10px 30px #0000001f;color:var(--color-on-surface)}.exchange-flow-card-title{font-size:1.05rem;font-weight:600;margin-bottom:6px}.exchange-flow-card-text{font-size:.95rem;line-height:1.6}@media(max-width:600px){.exchange-flow-step-circle{width:48px;height:48px}.exchange-flow-track{gap:12px}}.exchange-flow-mobile{display:none;margin-top:32px}.exchange-flow-mobile-step{display:flex;gap:16px;align-items:flex-start;margin-bottom:24px}.exchange-flow-mobile-icon-col{display:flex;flex-direction:column;align-items:center}.exchange-flow-mobile-connector{width:3px;flex:1 1 auto;margin-top:6px;border-radius:999px;background:var(--color-outline)}.exchange-flow-mobile-connector--filled{background:var(--color-primary)}.exchange-flow-card--mobile{max-width:none}@media(max-width:768px){.exchange-flow-desktop{display:none}.exchange-flow-mobile{display:block}}.download{padding:64px 24px;background:var(--color-background)}.download-inner{max-width:var(--max-width);margin:0 auto;text-align:center}.download-title{font-size:1.75rem;font-weight:700;color:var(--color-on-surface);margin-bottom:12px}.download-text{color:var(--color-on-surface-variant);margin-bottom:24px}.download-buttons{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:12px}.download-button{display:inline-flex;align-items:center;gap:10px;padding:14px 28px;background:var(--color-primary);color:var(--color-on-primary);font-weight:600;font-size:1rem;border-radius:var(--radius);transition:opacity .2s,transform .15s}.download-button:hover{opacity:.9;transform:translateY(-1px)}.download-button-icon{width:24px;height:24px}.download-button--app-store{background:var(--color-on-surface);color:var(--color-background)}.download-button--app-store:hover{opacity:.92}.footer{padding:32px 24px;background:var(--color-surface);color:var(--color-on-surface-variant);border-top:1px solid var(--color-outline)}.footer-inner{max-width:var(--max-width);margin:0 auto;text-align:center}.footer-nav{display:flex;flex-wrap:wrap;justify-content:center;gap:16px 24px;margin-bottom:12px}.footer-nav a{color:var(--color-on-surface);font-weight:500;transition:color .2s}.footer-nav a:hover{color:var(--color-primary)}.footer-copy{font-size:.875rem;margin:0;color:var(--color-on-surface-variant)}.doc-main-wrap{padding-top:var(--header-height);min-height:100vh;background:var(--color-background)}.doc-inner{max-width:var(--max-width);margin:0 auto;padding:48px 24px 64px}.doc-title{font-size:1.75rem;font-weight:700;color:var(--color-on-surface);margin-bottom:1.5rem}.doc-loading,.doc-empty{color:var(--color-on-surface-variant)}.doc-error{color:var(--color-error)}.doc-content{font-size:1rem;line-height:1.7;color:var(--color-on-surface)}.doc-content h1,.doc-content h2,.doc-content h3{margin:1.5rem 0 .5rem;color:var(--color-on-surface)}.doc-content h1{font-size:1.5rem}.doc-content h2{font-size:1.25rem}.doc-content h3{font-size:1.1rem}.doc-content p{margin:0 0 .75rem}.doc-content ul,.doc-content ol{margin:0 0 .75rem;padding-left:1.5rem}.doc-content a{color:var(--color-secondary);text-decoration:none}.doc-content a:hover{text-decoration:underline}.doc-content blockquote{margin:0 0 .75rem;padding-left:1rem;border-left:4px solid var(--color-outline);color:var(--color-on-surface-variant)}.doc-content code{background:var(--color-surface-variant);color:var(--color-on-surface);padding:.15rem .4rem;border-radius:4px;font-size:.9em}.doc-content pre{background:var(--color-surface-variant);padding:1rem;border-radius:var(--radius);overflow-x:auto;margin:0 0 .75rem}.doc-content pre code{background:none;padding:0}*,*:before,*:after{box-sizing:border-box}*{margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6;color:var(--color-on-background);background:var(--color-background)}img{max-width:100%;height:auto;display:block}a{color:inherit;text-decoration:none}:root{--header-height: 64px;--max-width: 960px;--radius: 12px;--color-primary: #4FAF3D;--color-primary-container: #EAF7E6;--color-on-primary: #FFFFFF;--color-on-primary-container: #1F3A1C;--color-secondary: #4DA6FF;--color-secondary-container: #E3F2FF;--color-on-secondary: #FFFFFF;--color-on-secondary-container: #00325A;--color-tertiary: #F5C542;--color-tertiary-container: #FFF6D5;--color-on-tertiary: #2B2B2B;--color-background: #F8F9FB;--color-on-background: #2B2B2B;--color-surface: #FFFFFF;--color-on-surface: #2B2B2B;--color-surface-variant: #F1F3F5;--color-on-surface-variant: #5F6368;--color-outline: #E5E7EB;--color-error: #E53935;--color-on-error: #FFFFFF}