:root{--red:#da000f;--red-dark:#93000a;--ink:#191818;--muted:#777070;--bg:#faf5f5;--line:#eae2e2;--white:#fff;font-family:Inter,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,a{-webkit-tap-highlight-color:transparent}button,input,textarea{font:inherit}button{cursor:pointer}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,textarea:focus-visible{outline:3px solid #da000f;outline-offset:5px}button:disabled{cursor:not-allowed}button svg{width:19px;height:19px}html{scroll-behavior:smooth;scroll-padding-top:25px}.wrap{width:min(1120px,calc(100% - 96px));margin-inline:auto}.site-header{height:104px;display:flex;align-items:center;gap:22px;border-bottom:1px solid var(--line)}.brand{display:block;width:145px;height:28px}.header-divider{height:19px;width:1px;background:#d8cccc}.header-label{font-size:13px;letter-spacing:1px;color:#665e5e}.official-link{margin-left:auto;font-size:12px;color:#665e5e;display:flex;align-items:center;gap:15px;min-height:44px}.official-link span{font-size:21px}.intro{position:relative;padding:24px 0 26px;overflow:hidden}.eyebrow{font-size:10px;font-weight:650;letter-spacing:2px;display:flex;align-items:center;gap:9px}.eyebrow>span{height:6px;width:6px;background:var(--red);border-radius:100%}h1{font-size:clamp(28px,2.5vw,36px);letter-spacing:-2px;line-height:1.35;margin:10px 0 8px;font-weight:650}h1 em{font-style:normal;color:var(--red)}.intro p{font-size:14px;color:#716969;line-height:1.9;margin:0}.how-link{display:inline-flex;align-items:center;gap:15px;margin-top:8px;font-size:12px;min-height:30px}.how-link span{color:var(--red);font-size:19px}.intro-decoration{position:absolute;right:55px;top:15px;font-size:135px;line-height:1;color:var(--red);transform:rotate(-12deg);opacity:.09;pointer-events:none}.mobile-break{display:none}.section-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:21px}.section-heading h2{font-size:21px;letter-spacing:-.5px;margin:0 0 7px;font-weight:650}.section-heading p{font-size:12px;color:var(--muted);margin:0}.selection-note{font-size:11px;letter-spacing:1px;color:var(--muted);padding-top:17px}.demo-note{font-size:11px;color:#8b5757;padding:10px 13px;background:#f2eaea;border-radius:6px;margin-bottom:16px}.support-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.support-card{position:relative;background:var(--white);border:1px solid #eee6e6;border-radius:15px;padding:24px 23px 17px;transition:transform .2s,border-color .2s,box-shadow .2s;cursor:pointer}.support-card:hover{transform:translateY(-4px);border-color:#e2b2b6;box-shadow:0 10px 30px #54202808}.card-top{display:flex;align-items:center;gap:15px}.avatar{flex-shrink:0;position:relative;display:flex;justify-content:center;align-items:center;width:62px;height:62px;border-radius:50%;font-size:25px;font-weight:500;background:#f7e6e7;color:#b32835;overflow:hidden}.avatar:after{content:'✦';font-family:serif;position:absolute;font-size:15px;right:6px;top:1px;color:#da000f66}.avatar.sand{background:#f2ece6;color:#79675a}.avatar.ink{background:#eceaeb;color:#51474c}.avatar img{width:100%;height:100%;object-fit:cover;z-index:1}.card-title h3{font-size:19px;font-weight:600;margin:0 0 6px}.card-title p{font-size:11px;margin:0;color:var(--muted)}.card-number{position:absolute;right:20px;top:25px;font-size:10px;color:#a39898;font-family:monospace}.primary-button{display:flex;align-items:center;justify-content:space-between;width:100%;border:0;border-radius:7px;background:var(--red);color:#fff;min-height:44px;padding:0 16px;font-size:12px;transition:background .2s}.primary-button:hover{background:var(--red-dark)}.primary-button>span{font-size:19px}.support-card .primary-button{margin-top:22px}.qr-button{border:0;background:none;display:flex;gap:7px;align-items:center;justify-content:center;width:100%;min-height:40px;font-size:11px;color:#7c7272;margin-top:5px}.qr-button:hover{color:var(--red)}.qr-button svg{width:13px;height:13px}.how-section{border-top:1px solid var(--line);margin-top:49px;padding:34px 0 26px;display:grid;grid-template-columns:1.1fr 2.2fr;gap:35px}.how-heading .eyebrow{color:#8b7d7d;font-size:9px;letter-spacing:1.7px}.how-heading h2{font-size:19px;margin:12px 0 0;font-weight:600}.steps{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.steps li{display:flex;gap:12px}.step-number{font-size:13px;color:var(--red);font-family:monospace;padding-top:2px}.steps h3{font-size:12px;margin:0 0 10px;font-weight:600}.steps p{font-size:10px;line-height:1.7;color:var(--muted);margin:0}.reminder{display:flex;align-items:center;gap:10px;color:#8d7d7d;font-size:10px;border-top:1px solid var(--line);padding:16px 0 26px}.reminder>span{font-size:15px}.reminder p{margin:0;line-height:1.8}.site-footer{display:flex;align-items:center;gap:24px;border-top:1px solid var(--line);padding:25px 0 30px}.site-footer p{font-size:10px;color:#918585}.site-footer a{margin-left:auto;font-size:10px;color:#807474}.site-footer img{opacity:.8}dialog{padding:0;border:none;color:var(--ink)}dialog::backdrop{background:#21141755;backdrop-filter:blur(3px)}.chat-dialog{position:fixed;inset:0;margin:auto;width:480px;height:min(700px,calc(100dvh - 48px));max-width:calc(100vw - 40px);max-height:none;border-radius:17px;box-shadow:0 25px 100px #24131730;background:#faf7f7;overflow:hidden}.chat-dialog[open]{display:flex;flex-direction:column}.chat-header{height:84px;flex-shrink:0;padding:18px 19px;display:flex;align-items:center;gap:12px;background:#fff;border-bottom:1px solid var(--line)}.chat-header h2{margin:0 0 5px;font-size:16px}.chat-header p{margin:0;color:var(--muted);font-size:10px}.chat-avatar{height:42px;width:42px;background:#f7e6e7;color:#b32835;display:grid;place-items:center;border-radius:50%;font-size:19px;overflow:hidden}.chat-avatar img{width:100%;height:100%;object-fit:cover}#chat-qr{margin-left:auto}.icon-button{width:44px;height:44px;display:grid;place-items:center;border:0;background:transparent;color:#776868;font-size:27px;border-radius:8px}.icon-button:hover{background:var(--bg)}#chat-frames{flex:1;min-height:0;position:relative}#chat-frames iframe{width:100%;height:100%;border:0;display:block}#chat-frames iframe[hidden]{display:none}.chat-bottom{font-size:9px;text-align:center;color:#998c8c;padding:12px;background:#fff}.qr-dialog{width:360px;max-width:calc(100vw - 32px);border-radius:20px;text-align:center;padding:37px 28px 24px}.qr-dialog .eyebrow{font-size:8px;justify-content:center;letter-spacing:1.5px;margin-top:12px}.qr-close{position:absolute;right:8px;top:6px}.qr-dialog h2{font-size:24px;margin:20px 0 8px}.qr-caption{font-size:12px;color:var(--muted)}#qr-content{min-height:220px;display:grid;place-items:center;margin:25px 0 10px;border:1px solid var(--line);border-radius:12px;background:#fcfafa;padding:16px}#qr-content img{max-width:100%;width:220px;max-height:280px;object-fit:contain}#qr-content p{font-size:12px;color:#887575;line-height:2}.qr-tip{font-size:10px;color:var(--muted);margin:13px 0 24px}.no-script{padding:20px;text-align:center}.chat-empty{height:100dvh;display:flex;flex-direction:column;background:#faf7f7}.chat-empty-main{padding:32px 24px;flex:1}.chat-stamp{text-align:center;color:#9d8d8d;font-size:10px;margin:0 0 32px}.message-brand{display:flex;gap:9px}.mini-mark{width:28px;height:28px;border-radius:50%;background:#da000f;color:#fff;display:grid;place-items:center;flex-shrink:0}.message-bubble{padding:15px 17px;background:#fff;border:1px solid #eee5e5;border-radius:0 13px 13px 13px;font-size:12px;line-height:1.9;max-width:290px}.message-bubble strong{font-weight:600}.message-bubble p{margin:6px 0 0;color:#817171}.preview-label{font-size:10px;color:#a18d8d;margin:8px 0 0 38px}.chat-empty-actions{display:flex;gap:8px;margin:20px 0 0 38px;flex-wrap:wrap}.chat-empty-actions button{font-size:11px;border:1px solid #e4d6d6;background:transparent;color:#8c3c43;border-radius:7px;min-height:38px;padding:7px 12px}.composer{margin:15px;border:1px solid #e7dddd;border-radius:10px;background:#fff;padding:13px;color:#aaa0a0;font-size:11px;display:flex;justify-content:space-between;align-items:center}.composer button{border:0;border-radius:6px;background:#eee5e5;color:#b4a9a9;width:32px;height:30px}.sdk-status{height:100dvh;display:grid;place-content:center;text-align:center;padding:25px;background:#faf7f7;font-size:13px;line-height:1.8}.sdk-status button{margin:8px 0;padding:10px;border:1px solid #dbcaca;border-radius:8px;background:white;color:var(--red)}
@media(min-width:1600px){.intro{padding-top:28px;padding-bottom:28px}.support-card{padding:30px 27px 20px}.support-card .primary-button{margin-top:28px}}@media(max-width:900px){.wrap{width:calc(100% - 48px)}.support-grid{gap:14px}.support-card{padding:20px 16px 13px}.card-number{right:14px;top:20px}.avatar{width:48px;height:48px;font-size:21px}.card-title h3{font-size:16px}.card-top{gap:10px}.how-section{grid-template-columns:1fr;gap:27px}.intro-decoration{right:20px;top:18px;font-size:110px}}@media(max-width:600px){.wrap{width:calc(100% - 36px)}.site-header{height:76px;gap:12px}.brand{width:118px;height:auto}.header-label{font-size:10px;letter-spacing:0}.header-divider{height:15px}.official-link{font-size:0;gap:0}.official-link span{font-size:21px}.intro{display:none}.support-section{padding-top:25px}.intro .eyebrow{font-size:8px;letter-spacing:1.7px}h1{font-size:32px;letter-spacing:-1px;line-height:1.45;margin:17px 0 13px}.mobile-break{display:block}.intro p{font-size:12px;line-height:1.9}.how-link{font-size:11px;margin-top:13px}.intro-decoration{right:-22px;top:70px;font-size:140px;opacity:.06}.section-heading{margin-bottom:17px}.section-heading h2{font-size:19px}.section-heading p{font-size:10px}.selection-note{font-size:9px;letter-spacing:0}.support-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.support-card{padding:20px 12px 9px;border-radius:12px}.card-top{flex-direction:column;gap:12px;text-align:center}.avatar{height:56px;width:56px;font-size:23px}.card-title h3{font-size:17px;margin-bottom:5px}.card-title p{font-size:10px}.card-number{font-size:9px;right:11px;top:12px}.support-card .primary-button{margin-top:17px;padding-inline:12px;font-size:11px}.qr-button{font-size:10px;margin-top:3px;min-height:44px}.how-section{margin-top:34px;padding-top:27px;gap:25px}.how-heading h2{font-size:18px}.steps{gap:12px}.steps li{flex-direction:column;gap:10px}.steps h3{font-size:11px;margin-bottom:7px}.steps p{font-size:9px;line-height:1.8}.reminder{align-items:flex-start;font-size:9px;padding:15px 0 24px}.reminder>span{line-height:1.4}.site-footer{padding:23px 0;gap:12px}.site-footer img{width:86px;height:auto}.site-footer p{font-size:9px}.site-footer a{font-size:9px}.chat-dialog{inset:0;width:100%;height:100dvh;max-width:100%;border-radius:0}.chat-header{padding-top:max(16px,env(safe-area-inset-top));height:auto;min-height:79px}.chat-bottom{padding-bottom:max(12px,env(safe-area-inset-bottom))}.demo-note{font-size:9px;padding:9px 10px;line-height:1.7}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}

/* Vector controls avoid platform-dependent symbol fonts, including iOS. */
.ui-icon{display:block;width:20px;height:20px;flex:0 0 auto;pointer-events:none}.primary-button .ui-icon{width:18px;height:18px}.how-link .ui-icon{width:17px;height:17px;color:var(--red)}.official-link .ui-icon{width:18px;height:18px}.icon-button{appearance:none;-webkit-appearance:none;flex-shrink:0;padding:0;line-height:1}.icon-button .ui-icon{width:20px;height:20px}.site-footer a{display:inline-flex;align-items:center;gap:6px}.site-footer .ui-icon{width:14px;height:14px}.composer button{display:grid;place-items:center;padding:0;appearance:none;-webkit-appearance:none}.composer .ui-icon{width:17px;height:17px}
/* Only show icon focus outlines for keyboard navigation, not dialog autofocus. */
.icon-button:focus-visible{outline:none}
body.keyboard-navigation .icon-button:focus-visible{outline:1px solid #a89999;outline-offset:2px}

.inline-chat-preview{height:100%;min-height:0;overflow:auto;-webkit-overflow-scrolling:touch}.inline-chat-preview[hidden]{display:none}.inline-chat-preview .chat-empty{height:100%;min-height:320px}.chat-empty-actions button{touch-action:manipulation;appearance:none;-webkit-appearance:none}