:root{color-scheme:dark;--bg:#111218;--text:#f5f2e9;--muted:#a9a6b6;--lav:#c5a3ed;--cream:#fff1bd;--line:#ffffff20}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,"PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased;overflow-x:hidden}button,input,textarea{font:inherit}button,a,input,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button{color:inherit}button:disabled{opacity:.5;cursor:wait}button:focus-visible,a:focus-visible{outline:2px solid var(--lav);outline-offset:5px}button{transition:transform .2s,background .2s,border-color .2s,box-shadow .2s}button:active{transform:scale(.97)}a{color:inherit;text-decoration:none}.shell{max-width:1440px;margin:auto;padding:0 5%}.ambient{position:fixed;pointer-events:none;z-index:-1;border-radius:50%;filter:blur(95px);opacity:.13}.ambient-a{width:430px;height:430px;background:#a883d2;right:5%;top:120px}.ambient-b{width:260px;height:260px;background:#f4d987;left:-170px;top:450px}header{height:96px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand,.dialog-brand{font-size:27px;letter-spacing:5px;font-weight:550;white-space:nowrap}.brand span,.dialog-brand span{font-size:14px;font-weight:400;letter-spacing:2px;color:var(--muted);margin-left:12px}nav{display:flex;align-items:center;gap:30px}.nav-link,.text-link,.quiet{border:0;background:transparent}.nav-link{font-size:14px}.nav-link:hover,.text-link:hover{color:var(--lav)}.login-chip{display:flex;align-items:center;gap:13px;min-width:110px;justify-content:center;padding:10px 17px;border:1px solid #ffffff35;background:#ffffff03;border-radius:30px;font-size:14px}.dot{width:6px;height:6px;background:var(--lav);display:inline-block;border-radius:50%;box-shadow:0 0 12px #c5a3ed60}.hero{display:grid;grid-template-columns:1.05fr 1fr;min-height:535px;align-items:center;gap:24px;padding:64px 0 52px}.eyebrow{font-size:10px;letter-spacing:4px;color:var(--lav);display:flex;align-items:center;gap:18px}.eyebrow i{width:26px;height:1px;background:var(--muted)}h1{font-size:clamp(46px,5.4vw,77px);letter-spacing:-3px;line-height:1.18;margin:29px 0 22px;font-weight:650}h1 span{color:var(--lav)}.lead{color:var(--muted);font-size:16px;line-height:1.9;margin:0 0 30px}.hero-actions{display:flex;align-items:center;gap:24px}.primary{background:var(--cream);color:#17171b;border:0;border-radius:40px;padding:17px 27px;font-size:15px;font-weight:600;display:flex;justify-content:center;align-items:center;gap:26px;box-shadow:0 0 30px #fff1bd06}.primary:hover{background:#fff7d8;transform:translateY(-3px);box-shadow:0 10px 30px #fff1bd15}.text-link{font-size:14px;padding:12px 0;border-bottom:1px solid #cfc8b668}.text-link span{margin-left:12px}.small-note{display:flex;gap:10px;align-items:center;margin-top:31px;color:#73717e;font-size:10px;letter-spacing:.5px}.small-note .dot{width:4px;height:4px;background:#b4ae92}.visual{position:relative;height:380px;background-image:radial-gradient(#ffffff10 .6px,transparent .6px);background-size:24px 24px}.paths{position:absolute;width:100%;height:100%;overflow:visible}.paths path{fill:none;stroke:#c5a3ed40;stroke-width:.8}.paths path:nth-child(2){stroke:#fff1bd30}.paths circle{fill:var(--lav);filter:drop-shadow(0 0 9px #c5a3ed)}.bubble{position:absolute;padding:20px 23px;border-radius:24px 24px 24px 4px;font-size:15px;box-shadow:0 10px 40px #0003;animation:float 7s ease-in-out infinite}.cream{top:26px;left:0;background:linear-gradient(120deg,#fff4ca,#e8dfbd);color:#262322}.purple{right:0;top:113px;background:linear-gradient(120deg,#c9aceb,#a17cce);color:#251d32;animation-delay:-3s;border-radius:24px 24px 4px 24px}.welcome{position:absolute;top:195px;left:8%;right:8%;display:flex;gap:22px;align-items:center;border:1px solid #c5a3ed70;border-radius:23px;padding:27px;background:linear-gradient(110deg,#ffffff08,#c5a3ed0e);box-shadow:inset 0 0 50px #c5a3ed04,0 25px 45px #0002;backdrop-filter:blur(12px)}.welcome img{width:79px;height:79px;border-radius:50%;object-fit:cover;border:1px solid #e1c7ff70}.welcome strong{font-size:27px;letter-spacing:-.7px}.welcome p{font-size:13px;color:#c2becd;margin:10px 0 0}.spark{position:absolute;right:18px;top:16px;color:var(--cream);font-size:15px}.mini-bubble{position:absolute;bottom:10px;right:0;border:1px solid #c5a3ed35;background:#c5a3ed15;border-radius:20px 20px 4px 20px;padding:9px 16px;letter-spacing:4px;font-size:8px;color:var(--lav)}.float-star{position:absolute;top:160px;left:0;color:var(--lav);font-size:26px;animation:float 6s infinite}.discover{border-top:1px solid var(--line);padding-top:24px}.section-label{display:flex;justify-content:space-between;color:var(--muted);font-size:13px;letter-spacing:3px;margin-bottom:21px}.section-label span:last-child{font-size:9px;letter-spacing:2px}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.feature{text-align:left;position:relative;background:linear-gradient(120deg,#ffffff03,#ffffff01);border:1px solid #ffffff28;border-radius:17px;padding:24px;overflow:hidden}.feature.english{background:linear-gradient(120deg,#b995e521,#b995e508);border-color:#c5a3ed75}.feature:hover{transform:translateY(-5px);border-color:var(--lav);box-shadow:0 18px 40px #0003}.card-top{display:flex;justify-content:space-between;align-items:center;color:#c0b8cc;letter-spacing:3px;font-size:10px}.arrow{font-size:23px;letter-spacing:0}.card-content{display:flex;gap:18px;align-items:center;padding:24px 0 9px}.icon{font-size:39px;color:var(--lav);font-weight:300;width:40px}h2{margin:0;font-weight:550;font-size:24px;letter-spacing:.5px}.feature p{margin:10px 0 0;color:var(--muted);font-size:12px;line-height:1.7}.question{display:flex;align-items:center;border:1px solid #ffffff25;background:#ffffff03;border-radius:40px;padding:9px 10px 9px 22px;gap:18px;margin-top:26px}.plus{font-size:30px;font-weight:200;color:var(--muted);padding-right:15px;border-right:1px solid var(--line)}input,textarea{min-width:0;background:transparent;border:0;outline:none;color:var(--text)}.question input{flex:1;font-size:14px}input::placeholder,textarea::placeholder{color:#77747f}.send{width:48px;height:48px;border:0;border-radius:50%;background:var(--cream);color:#19191d;font-size:27px;flex-shrink:0}.send:hover{transform:translateY(-2px);box-shadow:0 0 20px #fff1bd20}footer{display:flex;align-items:center;gap:20px;color:#73717e;padding:30px 0;font-size:9px;letter-spacing:2px}footer i{flex:1;height:1px;background:var(--line)}footer span:last-child{letter-spacing:1px}dialog{background:linear-gradient(135deg,#202029,#17171e);color:var(--text);border:1px solid #c5a3ed45;border-radius:26px;padding:38px;width:min(460px,calc(100% - 30px));box-shadow:0 50px 120px #0008}dialog::backdrop{background:#08090dd9;backdrop-filter:blur(12px)}dialog[open]{animation:appear .25s ease-out}.close{position:absolute;right:17px;top:14px;background:none;border:0;font-size:27px;color:var(--muted)}.dialog-brand{font-size:16px;letter-spacing:3px}.dialog-brand span{font-size:10px;letter-spacing:1px;margin-left:8px}.login-avatar{display:block;width:75px;height:75px;border-radius:50%;margin:32px auto 23px;border:2px solid #c5a3ed70}.center{justify-content:center;font-size:8px;letter-spacing:3px}#login-dialog h2{text-align:center;font-size:26px;margin-top:18px}.muted{text-align:center;color:var(--muted);font-size:13px;margin:13px 0 25px}label{display:block;font-size:12px;color:#b6b0c2;margin-top:17px}label>input,.password-field{width:100%;margin-top:9px;border:1px solid #ffffff25;background:#09091035;border-radius:11px;padding:13px 15px;color:var(--text)}label>input:focus,.password-field:focus-within{border-color:var(--lav)}.password-field{display:flex}.password-field input{width:100%}.password-field button{background:none;border:0;color:var(--muted);font-size:11px;white-space:nowrap}.error{color:#ffb3b3;font-size:12px;min-height:17px;margin:14px 0}.wide{width:100%;padding:14px}.private-note{text-align:center;font-size:10px;color:#777381;margin:23px 0 0}#chat-dialog{width:min(880px,calc(100% - 24px));height:min(760px,90dvh);padding:25px;overflow:hidden}#chat-dialog[open]{display:flex;flex-direction:column}.chat-top{display:flex;align-items:center;justify-content:space-between;gap:14px}.chat-top .eyebrow{font-size:8px;letter-spacing:2px;margin-bottom:9px}.chat-top h2{font-size:23px}.quiet{color:var(--muted);font-size:12px}.close-inline{border:0;background:none;color:var(--muted);font-size:28px;margin-left:15px}.tabs{display:flex;gap:8px;margin-top:20px}.tabs button{border:1px solid #ffffff20;background:transparent;color:var(--muted);border-radius:25px;padding:8px 13px;font-size:12px}.tabs .selected{border-color:var(--lav);color:var(--lav);background:#c5a3ed15}.messages{flex:1;overflow:auto;padding:25px 2px;display:flex;flex-direction:column;gap:15px;min-height:0}.msg{white-space:pre-wrap;overflow-wrap:anywhere;font-size:14px;line-height:1.85;padding:15px 18px;background:#ffffff06;border:1px solid #ffffff10;border-radius:17px;max-width:90%}.msg.user{align-self:flex-end;background:#c5a3ed15;border-color:#c5a3ed30}.msg.assistant{align-self:flex-start}.chat-form{display:flex;align-items:flex-end;gap:12px;background:#08091044;border:1px solid #ffffff25;border-radius:19px;padding:12px}.chat-form textarea{resize:none;flex:1;line-height:1.6;padding:5px}.chat-form:focus-within{border-color:#c5a3ed60}.chat-note{font-size:10px;color:#85808f;text-align:center;margin:12px 0 0}.toast{position:fixed;bottom:25px;left:50%;transform:translate(-50%,20px);opacity:0;transition:.25s;background:#2b2535;border:1px solid #c5a3ed50;border-radius:16px;padding:14px 22px;z-index:100;font-size:13px;pointer-events:none}.toast.show{opacity:1;transform:translate(-50%,0)}.click-spark{position:fixed;width:5px;height:5px;pointer-events:none;background:var(--lav);border-radius:50%;z-index:2000;animation:particle .5s ease-out forwards}@keyframes particle{to{transform:translate(var(--dx),var(--dy));opacity:0}}@keyframes appear{from{opacity:0;transform:translateY(12px) scale(.98)}to{opacity:1;transform:none}}@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}@media(min-width:1600px){.hero{min-height:590px}}@media(max-width:1000px){.hero{gap:5px}.hero-actions{gap:14px}.welcome{padding:20px;gap:14px;left:3%;right:3%}.welcome strong{font-size:23px}.welcome img{width:65px;height:65px}.bubble{font-size:12px;padding:16px}.card-content{gap:12px}.feature{padding:20px}.feature h2{font-size:21px}.feature p{font-size:11px}.lead{font-size:14px}.small-note{font-size:8px}}@media(max-width:700px){.shell{padding:0 6%}header{height:76px}.brand{font-size:18px;letter-spacing:3px}.brand span{font-size:10px;margin-left:6px;letter-spacing:1px}nav{gap:8px}.nav-link{display:none}.login-chip{min-width:82px;font-size:12px;padding:8px 12px;gap:9px}.hero{grid-template-columns:1fr;padding-top:38px;padding-bottom:25px;gap:15px}h1{font-size:52px;letter-spacing:-2px;margin-top:24px}.eyebrow{font-size:8px;letter-spacing:3px}.lead{font-size:13px}.primary{font-size:13px;padding:14px 22px;gap:18px}.text-link{font-size:12px}.small-note{margin-top:24px}.visual{height:260px;margin-top:12px}.cream{top:4px}.purple{top:57px}.welcome{top:120px;left:9%;right:4%;padding:20px}.welcome strong{font-size:23px}.welcome p{font-size:11px}.welcome img{width:57px;height:57px}.mini-bubble{bottom:0}.float-star{top:100px}.cards{grid-template-columns:1fr;gap:12px}.feature{padding:16px 21px}.card-top{font-size:9px}.card-content{padding-top:9px;gap:15px}.feature h2{font-size:22px}.feature p{font-size:12px;margin-top:6px}.icon{font-size:32px}.section-label span:last-child{display:none}.question{gap:10px;padding-left:14px}.question input{font-size:12px}.plus{font-size:23px;padding-right:10px}.send{width:41px;height:41px;font-size:24px}footer{font-size:8px;gap:9px}footer span:last-child{font-size:8px;letter-spacing:0}dialog{padding:28px}#chat-dialog{padding:19px}.msg{max-width:95%;font-size:13px}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}.click-spark{display:none}}

[hidden]{display:none!important}#space-dialog{width:min(920px,calc(100% - 28px));max-height:88dvh;overflow:auto}.space-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:23px 0}.space-tabs button,.small-button{border:1px solid #ffffff28;background:#ffffff04;border-radius:10px;padding:9px 13px;font-size:12px;color:var(--muted)}.space-tabs button:hover,.small-button:hover{border-color:var(--lav);color:var(--text)}.history-row,.user-row{padding:16px 0;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:12px}.history-info{flex:1;min-width:0}.history-open{padding:0;background:none;border:0;font-size:15px;display:block;text-align:left;overflow-wrap:anywhere}.row-detail{font-size:11px;color:var(--muted);margin-top:8px}.row-actions{display:flex;gap:5px}.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:20px 0}.metric{padding:20px 15px;border:1px solid var(--line);border-radius:15px;background:#ffffff03}.metric strong{font-size:24px;display:block}.metric span{font-size:11px;color:var(--muted);display:block;margin-top:10px}.space-help{font-size:12px;color:var(--muted);line-height:1.8}.usage-line{font-size:10px;color:#a59ab5;margin-top:10px;border-top:1px solid #ffffff15;padding-top:8px}.manage-form{border:1px solid var(--line);border-radius:16px;padding:18px;margin:20px 0}.manage-form input{display:block;width:100%;border:1px solid #ffffff25;background:#09091035;border-radius:8px;padding:11px;margin-top:7px}.manage-form button{margin-top:18px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px 18px}.user-row{align-items:flex-start}.panel-heading{font-size:17px;margin-top:25px}.table-note{font-size:11px;color:var(--muted);line-height:1.8}@media(max-width:700px){.metrics{grid-template-columns:1fr}.metric{padding:14px}.metric strong{font-size:21px}.form-grid{grid-template-columns:1fr}.history-row,.user-row{flex-wrap:wrap}.row-actions{flex-wrap:wrap}.member-only{display:none}.space-tabs{gap:6px}.space-tabs button{padding:8px 10px}.nav-link.member-only{display:none}}

.attach-button{background:#c5a3ed15;border:1px solid #c5a3ed35;width:38px;height:38px;border-radius:12px;color:var(--lav);font-size:26px;flex-shrink:0;margin-bottom:4px}.image-preview{display:flex;gap:10px;flex-wrap:wrap;padding:5px 0;max-height:120px;overflow:auto}.preview-item{position:relative}.preview-item img{width:90px;height:70px;object-fit:cover;border-radius:10px;border:1px solid #c5a3ed55}.preview-item button{position:absolute;right:-5px;top:-5px;background:#292331;color:white;padding:0;width:22px;height:22px;border-radius:50%}.message-image{display:block;max-width:100%;width:auto;max-height:230px;border-radius:10px;margin-top:12px;object-fit:contain;background:white}.chat-form textarea{width:0}#image-preview:empty{display:none}