:root{--ink:#172538;--muted:#52637a;--blue:#2e5cff;--line:#dce4f1;--soft:#f5f8ff;--navy:#13243e;--radius:18px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;color:var(--ink);background:#fff;font-family:Inter,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.75;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer}button,a{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--blue);outline-offset:5px}button:disabled{cursor:default}.wrap{width:min(1200px,calc(100% - 96px));margin-inline:auto}.header{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:90px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;white-space:nowrap}.brand b{color:var(--blue);font-weight:700}.brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:9px;background:var(--blue);color:#fff;font-size:19px;font-family:"Songti SC",serif}.header nav{display:flex;gap:28px;font-size:14px;color:var(--muted)}.header a:hover,.text-link:hover{color:var(--blue)}.company-link{font-size:14px}.company-link span{padding-left:8px}.hero{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center;padding-block:84px 80px}.eyebrow{font-size:11px;font-weight:700;letter-spacing:.16em;color:var(--blue);margin:0 0 22px}.small-line{display:inline-block;width:22px;height:2px;background:var(--blue);vertical-align:middle;margin-right:9px}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(44px,4.6vw,64px);letter-spacing:-.04em;line-height:1.25;margin-bottom:26px;font-weight:750}h1 span{color:var(--blue)}.lead{font-size:18px;line-height:1.9;color:var(--muted);margin-bottom:30px}.actions{display:flex;gap:12px;flex-wrap:wrap}.button{display:inline-flex;gap:26px;align-items:center;justify-content:center;min-height:48px;border:1px solid transparent;border-radius:8px;padding:11px 24px;font-size:14px;font-weight:600;transition:background .16s,transform .16s}.button.primary{background:var(--blue);color:#fff}.button.primary:hover{background:#244be0;transform:translateY(-1px)}.button.secondary{border-color:var(--line);background:#fff}.button.secondary:hover{border-color:var(--blue)}.hero-note{font-size:12px;color:var(--muted);margin:24px 0 0;max-width:430px;line-height:1.9}.hero-note span{padding:0 6px;color:#a3b0c0}.connection{border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 20px 60px #19396c0d;min-width:0;overflow:hidden;background:linear-gradient(145deg,#fbfdff,#f2f6ff)}.connection-top{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:18px 25px;border-bottom:1px solid var(--line);font-size:9px;font-weight:700;letter-spacing:.12em;color:var(--muted)}.connection-top>span:first-child{display:flex;align-items:center;gap:8px}.connection-dot{width:7px;height:7px;border-radius:50%;background:var(--blue)}.connection-body{padding:32px}.label{font-size:13px;color:var(--muted);margin-bottom:17px}.endpoint-title{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:13px}.endpoint-title h2{font-size:19px;margin:0;font-weight:650;letter-spacing:-.02em}.copy{font-size:12px;border:1px solid #ccd6e8;background:#fff;color:#344b70;border-radius:6px;padding:6px 12px;min-height:34px;white-space:nowrap}.copy:hover{border-color:var(--blue);color:var(--blue)}.endpoint{display:block;color:#2149bb;background:#fff;border:1px solid var(--line);border-radius:9px;padding:18px;font-size:14px;line-height:1.8;overflow-wrap:anywhere}.routes{margin-top:27px}.routes>div{display:flex;align-items:center;gap:12px;padding:13px 0;border-bottom:1px solid var(--line);font-size:12px}.routes>div>span:last-child{margin-left:auto;color:var(--muted)}.routes code{font-size:12px}.method{font-size:9px;font-weight:800;letter-spacing:.02em;background:#e1eaff;color:#2d53af;border-radius:4px;padding:2px 5px;min-width:37px;text-align:center}.method.get{background:#e4f1ee;color:#2b6657}.connection-footer{display:flex;align-items:center;gap:14px;padding-top:26px}.key-symbol{font-size:27px;color:#6c88ba}.connection-footer p{font-size:12px;color:var(--muted);line-height:1.8;margin:0}.compatibility{display:flex;align-items:center;justify-content:space-between;gap:30px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding-block:25px}.compatibility p{font-size:12px;color:var(--muted);margin:0}.compatibility>div{display:flex;flex-wrap:wrap;gap:32px;font-size:16px;font-weight:600;color:#425575}.section{padding-block:86px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:40px;margin-bottom:38px}h2{font-size:clamp(27px,3vw,38px);line-height:1.4;letter-spacing:-.025em;margin-bottom:0;font-weight:650}.section-heading .eyebrow{margin-bottom:15px}.section-heading>p{font-size:14px;color:var(--muted);margin:0;line-height:1.9}.capabilities{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;border-block:1px solid var(--line)}.capabilities article{padding:30px 28px 30px 0;min-width:0}.capabilities article+article{padding-left:28px;border-left:1px solid var(--line)}.feature-number{font-size:10px;letter-spacing:.1em;color:var(--blue);font-weight:600}.capabilities h3{font-size:20px;margin-top:24px;margin-bottom:15px;font-weight:650}.capabilities p{font-size:14px;color:var(--muted);line-height:1.9;margin-bottom:22px}.capabilities code{font-size:11px;color:#355796;background:var(--soft);padding:6px 9px;border-radius:4px;overflow-wrap:anywhere}.section-note{font-size:12px;color:var(--muted);margin:20px 0 0}.start-section{background:var(--soft);border-block:1px solid var(--line)}.setup-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:52px;align-items:start}.step{display:flex;gap:16px;margin-bottom:28px}.step>span{display:grid;place-items:center;flex-shrink:0;width:26px;height:26px;border:1px solid #b6c9f6;color:var(--blue);background:#fff;border-radius:50%;font-size:12px;font-weight:600;margin-top:3px}.step h3{font-size:16px;margin-bottom:6px;font-weight:650}.step p{font-size:13px;color:var(--muted);margin:0;line-height:1.9}.text-link{font-size:12px;color:#264fc4;font-weight:600}.code-panel{min-width:0;border-radius:12px;background:var(--navy);color:#dce7fa;overflow:hidden;box-shadow:0 15px 40px #1a305115}.code-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 16px;border-bottom:1px solid #ffffff1c}.tabs{display:flex;gap:2px}.tabs button{color:#aebfd9;background:none;border:0;padding:9px 10px;font-size:12px;border-radius:5px}.tabs button[aria-selected=true]{background:#ffffff12;color:#fff}.tabs button:hover{color:#fff}.code-copy{background:#ffffff08;color:#d4def0;border-color:#ffffff30;padding:5px 10px}.code-copy:hover{color:#fff;border-color:#8badff}.code-panel section{padding:24px 24px 14px}.code-caption{font-size:11px;color:#a2b6d6;margin-bottom:16px}pre{margin:0;overflow-x:auto;max-width:100%;padding-bottom:12px;scrollbar-width:thin}pre code{font-family:"SFMono-Regular",Consolas,"Liberation Mono",monospace;font-size:12px;line-height:1.95;white-space:pre}.code-footnote{display:flex;justify-content:space-between;flex-wrap:wrap;gap:6px 15px;font-size:10px;color:#acbdd8;padding:14px 24px;border-top:1px solid #ffffff1c}.code-footnote a{text-decoration:underline;text-underline-offset:3px}.setup-note{font-size:12px;color:var(--muted);margin:25px 0 0}.faq-section{display:grid;grid-template-columns:.65fr 1.35fr;gap:65px}.faq-list details{border-bottom:1px solid var(--line);padding:21px 0}.faq-list details:first-child{border-top:1px solid var(--line)}summary{display:flex;justify-content:space-between;align-items:center;gap:18px;cursor:pointer;list-style:none;font-size:15px;font-weight:600}summary::-webkit-details-marker{display:none}summary>span{font-size:22px;font-weight:400;color:var(--blue)}details[open] summary>span{transform:rotate(45deg)}.faq-list p{font-size:13px;line-height:1.95;color:var(--muted);margin:15px 28px 0 0;overflow-wrap:anywhere}.faq-list p strong{color:#354966;font-weight:600}.faq-list a{color:var(--blue);text-decoration:underline;text-underline-offset:3px}.closing{display:flex;justify-content:space-between;align-items:center;gap:30px;border-top:1px solid var(--line);padding-block:46px 55px}.closing .eyebrow{margin-bottom:14px}.closing h2{font-size:28px}.closing p:last-child{color:var(--muted);font-size:13px;margin:15px 0 0}.closing .button{flex-shrink:0}.footer{display:flex;align-items:center;justify-content:space-between;gap:22px;flex-wrap:wrap;border-top:1px solid var(--line);padding-block:30px}.footer .brand{font-size:14px}.footer .brand-mark{width:27px;height:27px;font-size:16px;border-radius:7px}.footer>div{display:flex;gap:22px;flex-wrap:wrap;font-size:11px;color:var(--muted)}.footer>p{font-size:11px;color:var(--muted);margin:0}.skip{position:absolute;left:20px;top:-100px;padding:10px 16px;background:#fff;z-index:10}.skip:focus{top:12px}.sr-only{position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}[hidden]{display:none!important}
@media(min-width:1600px){.hero{padding-block:105px 95px}}
@media(max-width:1000px){.wrap{width:calc(100% - 64px)}.hero{gap:32px;padding-block:65px}.hero-note span{padding:0 3px}.connection-body{padding:25px}.connection-top{padding:16px 20px}.compatibility{align-items:start;flex-direction:column;gap:12px}.setup-grid{gap:30px;grid-template-columns:.8fr 1.2fr}.faq-section{gap:35px}.header nav{gap:19px}.section{padding-block:65px}}
@media(max-width:760px){.wrap{width:calc(100% - 40px)}.header{min-height:76px;gap:14px;flex-wrap:wrap;padding-block:15px}.brand{font-size:16px}.header nav{order:3;width:100%;justify-content:flex-start;gap:24px;padding-top:3px;font-size:12px}.company-link{font-size:12px;margin-left:auto}.hero{grid-template-columns:minmax(0,1fr);padding-block:44px 38px;gap:37px}.hero-copy h1{font-size:46px}.lead{font-size:17px}.hero-note{font-size:11px;max-width:none}.connection-body{padding:24px}.endpoint{font-size:13px}.compatibility{padding-block:23px}.compatibility>div{gap:13px 23px;font-size:14px}.section{padding-block:50px}.section-heading{align-items:start;flex-direction:column;gap:20px;margin-bottom:28px}.section-heading>p br{display:none}h2{font-size:29px}.capabilities{grid-template-columns:minmax(0,1fr)}.capabilities article,.capabilities article+article{padding:25px 0;border-left:0}.capabilities article+article{border-top:1px solid var(--line)}.capabilities h3{margin-top:16px}.capabilities p{margin-bottom:18px}.setup-grid{grid-template-columns:minmax(0,1fr);gap:30px}.setup-steps{max-width:550px}.code-panel section{padding:20px 18px 10px}.code-toolbar{padding:9px 11px;gap:5px}.tabs button{padding:9px 8px;font-size:11px}.code-copy{font-size:11px;padding:4px 8px}.code-footnote{padding:13px 18px}.faq-section{grid-template-columns:minmax(0,1fr);gap:30px}.closing{align-items:start;flex-direction:column;padding-block:32px 40px}.closing h2{font-size:25px}.footer{align-items:start;flex-direction:column;gap:18px}.footer>div{gap:12px 19px}.eyebrow{font-size:10px}}
.contact-section{align-items:center;gap:52px;padding-block:54px 60px}.contact-copy{max-width:620px}.contact-copy>p:not(.eyebrow){font-size:14px;line-height:1.9;color:var(--muted);margin:18px 0}.contact-copy>p.contact-hint{font-size:12px;margin:0 0 24px}.contact-copy .button{margin-top:0}.wechat-card{margin:0;flex-shrink:0;width:280px;max-width:100%;padding:18px 18px 20px;border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:0 12px 35px #19396c08}.qr-image-link{display:block;border-radius:6px}.qr-image-link img{display:block;width:100%;height:auto}.wechat-card figcaption{display:flex;align-items:center;flex-direction:column;gap:7px;margin-top:10px;font-size:13px}.wechat-card figcaption strong{font-weight:600}.wechat-card .text-link{font-size:12px}
@media(max-width:760px){.contact-section{align-items:stretch;gap:28px;padding-block:36px 42px}.wechat-card{align-self:center;width:280px}.contact-copy h2{font-size:28px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}