:root{--blue:#476be5;--ink:#30384b;--line:#e9edf4}*{box-sizing:border-box}body{margin:0;background:#f8f9fc;color:var(--ink);font:14px 'Microsoft YaHei','PingFang SC',sans-serif}button,input,textarea,select{font:inherit}button,a,select{cursor:pointer}button{border:0;background:none;color:inherit}a{color:inherit;text-decoration:none}i{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0}svg{width:20px;height:20px;stroke:currentColor;stroke-width:1.65;fill:none;stroke-linecap:round;stroke-linejoin:round}[hidden]{display:none!important}a:focus-visible,button:focus-visible{outline:3px solid #9caef2;outline-offset:4px}.sidebar{position:fixed;inset:0 auto 0 0;width:206px;background:#fff;border-right:1px solid var(--line);padding:32px 16px;z-index:20}.brand{display:flex;align-items:center;gap:10px;padding:0 9px 41px;font-size:23px;letter-spacing:1px}.brand-symbol{width:39px;height:40px;overflow:hidden;flex-shrink:0}.brand-symbol img{height:40px;width:auto;max-width:none}.brand strong{font-weight:700;white-space:nowrap}.nav-item{display:flex;align-items:center;gap:13px;font-size:14px;color:#758096;padding:15px 18px;border-radius:7px;margin-bottom:9px}.nav-item svg{width:19px}.nav-item:hover{background:#f5f7fc;color:var(--blue)}.nav-item.active{background:#edf2ff;color:var(--blue);font-weight:600}.nav-divider{height:1px;background:#f0f2f6;margin:19px 14px 24px}.shell{margin-left:206px;min-height:100vh}.mobile-header{display:none}main{width:100%;max-width:990px;margin:auto;padding:64px 110px 0 62px;display:flex;flex-direction:column;min-height:100vh}.page-heading{text-align:center;margin-bottom:30px}.page-heading h1{font-size:30px;font-weight:600;letter-spacing:2px;margin:0 0 15px}.page-heading p{font-size:14px;color:#929bad;margin:0}.card{background:#fff;border:1px solid #e7ebf3;border-radius:12px}.generator{padding:34px 36px 20px;box-shadow:0 6px 28px #3a527005}label{font-size:14px;font-weight:500;display:block;margin-bottom:13px}textarea{display:block;width:100%;min-height:118px;resize:vertical;border:1px solid #e0e5ef;border-radius:7px;background:#fff;color:#46516b;padding:17px;line-height:1.8;outline:none;font-size:14px}textarea::placeholder{color:#b0b7c5}textarea:focus,select:focus{border-color:#8ea6ee;box-shadow:0 0 0 3px #eff3ff}.two-fields{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:28px}select{width:100%;height:47px;padding:0 13px;background:#fff;border:1px solid #e0e5ef;border-radius:6px;color:#65728a;outline:none;font-size:13px}select:invalid{color:#a9b2c3}.more-button{display:flex;align-items:center;gap:6px;margin:23px 0 27px;padding:0;color:#97a0b2;font-size:12px}.more-button svg{width:14px;height:14px}.more-button[aria-expanded=true] i{transform:rotate(180deg)}#moreOptions{padding:0 0 24px}#moreOptions .two-fields{margin-top:0;margin-bottom:22px}#moreOptions textarea{font-size:12px;min-height:95px}.primary{display:inline-flex;align-items:center;justify-content:center;gap:12px;background:var(--blue);color:#fff;border-radius:7px;padding:15px 28px;font-size:14px}.primary:hover{background:#365bd5}.primary:disabled{opacity:.65;cursor:wait}.generate{width:100%;height:50px;font-size:15px;letter-spacing:2px}.generate svg{width:17px}.demo-note{font-size:11px;color:#a5adbc;text-align:center;margin:15px 0 0}.activity{margin:26px 7px 0;color:#9aa4b7}.activity-caption{display:flex;align-items:center;justify-content:space-between;font-size:11px;margin-bottom:10px}.activity-caption>span{display:flex;align-items:center;gap:7px}.activity-caption small{font-size:10px;color:#b3bac8}.live-dot{display:inline-block;width:5px;height:5px;border-radius:50%;background:#6cb6a2}.activity-window{height:35px;overflow:hidden}.activity-row{height:35px;display:flex;align-items:center;gap:9px;font-size:11px;color:#a2acbd}.user-badge{display:none}.activity-row strong{font-weight:400;white-space:nowrap;color:#94a0b5}.paper-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.activity-status{margin-left:auto;font-size:10px;color:#94b4a9;white-space:nowrap}.activity-time{display:none}footer{margin-top:auto;text-align:center;color:#bcc3d0;font-size:11px;padding:55px 0 24px}.floating-tools{position:fixed;right:25px;bottom:36px;z-index:30;display:flex;flex-direction:column;gap:8px}.floating-tools button{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:7px;width:67px;height:65px;border:1px solid #e9edf4;background:#fff;border-radius:8px;box-shadow:0 3px 12px #394b7010;color:#8792a7;font-size:10px}.floating-tools button:hover{color:var(--blue);border-color:#b5c5f5}.floating-tools button:first-child{color:#6584da;background:#f2f5ff;border-color:#e5ebfc}.floating-tools svg{width:21px;height:21px}.intro-hero{text-align:center;padding:60px 0 65px}.intro-hero h1{font-size:40px;letter-spacing:3px;font-weight:600;margin:0 0 22px}.intro-hero p{color:#919cb1;font-size:15px;margin:0 0 34px}.intro-steps{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);padding-top:32px;gap:20px;text-align:center}.intro-steps b{font-size:12px;color:#95a9d7;font-weight:500}.intro-steps h2{font-size:17px;font-weight:500;margin:17px 0 12px}.intro-steps p{font-size:12px;color:#9da7b9;margin:0}.icon-button{height:30px;width:30px;display:grid;place-items:center;color:#939fb5;border-radius:5px}.icon-button:hover{background:#f0f3f9}dialog{width:580px;max-width:calc(100% - 36px);max-height:85vh;padding:26px;border:1px solid #e8edf5;border-radius:13px;color:var(--ink);box-shadow:0 25px 100px #26335433}dialog::backdrop{background:#222e4c66;backdrop-filter:blur(3px)}.modal-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}.modal-header h2{font-size:19px;font-weight:600;margin:0}#modalBody{color:#8390a4;font-size:13px;line-height:1.9}#modalBody details{padding:14px 0;border-bottom:1px solid var(--line)}#modalBody summary{cursor:pointer;color:#52627e}#modalBody details p{font-size:12px;margin:10px 0 0}#modalBody .primary{margin-top:15px}.modal-note{font-size:12px;background:#f3f6fc;border-radius:6px;padding:12px 15px}.result-paper{padding:20px;border:1px solid var(--line);border-radius:7px;max-height:40vh;overflow:auto}.result-paper h3{font-size:15px;color:#415575}.result-paper p{font-size:12px;white-space:pre-wrap}.progress-track{height:6px;background:#eff2fa;border-radius:5px;margin:25px 0 15px;overflow:hidden}.progress-track span{height:100%;background:var(--blue);display:block;transition:width .5s}.progress-label{display:flex;justify-content:space-between;font-size:12px}.progress-steps{display:flex;justify-content:space-between;font-size:10px;color:#a2abc0;margin-top:20px}#toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);padding:12px 20px;border-radius:8px;background:#344563;color:white;z-index:99;font-size:12px;opacity:0;pointer-events:none}#toast.show{opacity:1;transform:translate(-50%,0)}.history-row{display:flex;align-items:center;justify-content:space-between;padding:22px;margin-top:18px}.history-row h3{font-size:14px}.history-row p{font-size:10px;color:#9da8bc}.history-row button{font-size:11px;color:var(--blue)}.empty-history{text-align:center;padding:50px 20px}
@media(min-width:1500px){main{max-width:1100px;padding-top:90px;padding-right:135px;padding-left:85px}.generator{padding:40px 44px 24px}.page-heading{margin-bottom:36px}textarea{min-height:135px}.floating-tools{right:32px;bottom:45px}}@media(max-width:1100px){main{padding:55px 105px 0 35px}.sidebar{width:190px;padding-left:12px;padding-right:12px}.shell{margin-left:190px}.brand{font-size:21px;gap:7px}.generator{padding:28px 26px 20px}.floating-tools{right:18px}.activity-status{display:none}.intro-steps p{font-size:11px}}@media(max-width:800px){.sidebar{width:175px}.shell{margin-left:175px}.brand{font-size:19px;padding-left:5px}.brand-symbol{width:34px;height:35px}.brand-symbol img{height:35px}.nav-item{padding:14px;font-size:13px}.generator{padding:25px 22px 18px}.two-fields{gap:15px}.intro-steps{grid-template-columns:1fr;gap:30px}.intro-hero h1{font-size:33px}.intro-hero p{font-size:13px}.page-heading h1{font-size:27px}}@media(max-width:650px){.sidebar{transform:translateX(-100%);transition:transform .2s;width:206px;box-shadow:12px 0 40px #23365b1a}.sidebar.open{transform:translateX(0)}.shell{margin-left:0}.mobile-header{display:flex;align-items:center;gap:12px;height:58px;background:#fff;border-bottom:1px solid var(--line);padding:0 16px;color:#7e8ba4;font-size:13px}main{min-height:calc(100vh - 58px);padding:32px 77px 0 18px}.page-heading{margin-bottom:25px}.page-heading h1{font-size:25px;margin-bottom:12px}.page-heading p{font-size:12px}.generator{padding:23px 18px 16px;border-radius:9px}label{font-size:13px;margin-bottom:11px}textarea{font-size:13px;min-height:110px;padding:13px}.two-fields{margin-top:23px;gap:12px}select{height:43px;font-size:12px;padding:0 7px}.more-button{font-size:11px;margin:22px 0}.generate{height:46px;font-size:14px}.demo-note{font-size:10px}.floating-tools{right:9px;bottom:26px;gap:6px}.floating-tools button{width:54px;height:58px;font-size:9px;gap:6px;border-radius:7px}.floating-tools svg{width:19px;height:19px}.activity{margin-top:21px;font-size:10px}.activity-row{font-size:10px;gap:6px}.activity-caption{font-size:10px}.activity-caption small{font-size:9px}.intro-hero{padding:35px 0 40px}.intro-hero h1{font-size:30px}.intro-hero p{font-size:12px;line-height:1.8}.intro-steps{gap:28px;padding-top:25px}.intro-steps h2{font-size:15px;margin:10px 0}.intro-steps p{font-size:11px}.primary{font-size:13px;padding:14px 22px}footer{font-size:10px;padding-top:40px}.progress-steps{font-size:8px}dialog{padding:22px}.modal-header h2{font-size:17px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}