.bg-gateway{--bg-ink:#322e25;--bg-muted:#6a6251;--bg-green:#506447;position:relative;max-width:1180px;margin:0 auto;color:var(--bg-ink);font-family:'Microsoft YaHei','PingFang SC',sans-serif}.bg-gateway *{box-sizing:border-box}.bg-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:20px 40px 0}.bg-heading h1{font:500 29px/1.5 'Songti SC',serif;margin:0}.bg-heading p{font-size:14px;margin:6px 0;color:var(--bg-muted)}.bg-gateway button{font:inherit;color:inherit;touch-action:manipulation}.bg-back{font-size:14px!important;min-height:44px;padding:8px 0;border:0;background:transparent;text-decoration:underline;text-underline-offset:5px}.bg-gateway button:focus-visible{outline:3px solid var(--bg-green);outline-offset:6px}.bg-board{position:relative;width:100%;aspect-ratio:1.38;isolation:isolate}.bg-board-art{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;pointer-events:none}.bg-papers{position:absolute;left:9%;right:13%;top:22%;bottom:13%;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px;align-items:center}.bg-report{position:relative;display:block;width:100%;padding:0;border:0;background:transparent;aspect-ratio:.67;transform:rotate(var(--paper-angle));transition:transform 180ms cubic-bezier(.23,1,.32,1);isolation:isolate}.bg-report:nth-child(2){translate:0 8px}.bg-paper-surface{display:block;position:relative;width:100%;height:100%}.bg-paper-art{position:absolute;inset:0;width:100%;height:100%;object-fit:fill;pointer-events:none}.bg-paper-copy{position:absolute;inset:10% 10% 8%;display:flex;flex-direction:column;align-items:center;text-align:center;gap:8px}.bg-brand{font-size:clamp(11px,1.25vw,14px);line-height:1.5;min-height:3em;display:flex;align-items:center;justify-content:center}.bg-paper-copy strong{font-family:'Songti SC',serif;font-size:clamp(15px,1.8vw,22px);font-weight:500;line-height:1.45}.bg-project-art{display:block;width:94%;height:36%;object-fit:contain;pointer-events:none;margin:auto 0}.bg-description{font-size:clamp(11px,1.18vw,14px);line-height:1.6;min-height:3em}.bg-read-label{font-size:12px;color:var(--bg-green);margin-top:auto}.bg-clip{position:absolute;left:calc(50% - 18px);top:0;width:36px;height:38px;transform-origin:center 8px;pointer-events:none;z-index:2}.bg-clip i{display:block;position:absolute;top:0;left:9px;width:18px;height:23px;border:3px solid #a48548;border-radius:10px 10px 2px 2px;background:#dfca92}.bg-clip b{position:absolute;left:0;top:18px;width:36px;height:17px;background:linear-gradient(90deg,#96723b,#d0ae68 45%,#a27e43);border-radius:3px}.bg-flight{position:absolute;inset:0;pointer-events:none;z-index:5;overflow:visible}.bg-moving-paper{transform-origin:top left;will-change:transform,opacity}.bg-moving-paper .bg-paper-copy{overflow:hidden}.bg-status{font-size:14px;text-align:center;min-height:1.6em;color:var(--bg-muted);margin:0 0 20px}.bg-gateway[data-phase=extracting] .bg-report,.bg-gateway[data-phase=returning] .bg-report,.bg-gateway[data-phase=closing] .bg-report{pointer-events:none}.bg-gateway[data-phase=reading] .bg-board{visibility:hidden}.bg-report[aria-current=true] .bg-read-label{text-decoration:underline;text-underline-offset:4px}
@media(hover:hover) and (pointer:fine){.bg-report:hover{transform:translateY(-8px) rotate(0) scale(1.035)}}
@media(max-width:650px){.bg-heading{padding:20px 18px 10px}.bg-heading h1{font-size:25px}.bg-board{aspect-ratio:auto;padding:26px 20px;background:#e7ddc7;border:12px solid #765138}.bg-board-art{display:none}.bg-papers{position:static;grid-template-columns:1fr;gap:24px;max-width:290px;margin:0 auto}.bg-report{max-width:290px;margin:0 auto;transform:rotate(var(--paper-angle))}.bg-report:nth-child(2){translate:none}.bg-paper-copy strong{font-size:23px}.bg-brand{font-size:15px}.bg-description{font-size:15px}.bg-read-label{font-size:14px}.bg-status{padding:16px}.bg-flight{overflow:hidden}}
@media(prefers-reduced-motion:reduce){.bg-report{transition:none}.bg-report:hover{transform:rotate(var(--paper-angle))}}