:root{
  --theme:#49f2ff;
  --theme-2:#7367ff;
  --theme-soft:rgba(73,242,255,.12);
  --bg:#040914;
  --bg-2:#091426;
  --card:rgba(10,20,37,.56);
  --line:rgba(255,255,255,.08);
  --text:#eaf8ff;
  --muted:#99b6c8;
  --shadow:0 20px 60px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;min-height:100%;font-family:Inter,Arial,"Microsoft YaHei",sans-serif;background:radial-gradient(circle at 10% 10%,rgba(73,242,255,.12),transparent 25%),radial-gradient(circle at 90% 20%,rgba(115,103,255,.15),transparent 28%),linear-gradient(145deg,#020611,#07101f 45%,#030813);color:var(--text)}
a{text-decoration:none;color:inherit}
button,input,textarea,select{font:inherit}
.hero{min-height:100vh;position:relative;overflow:hidden}
.bg-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:40px 40px;mask-image:radial-gradient(circle at center,black 55%,transparent 95%);pointer-events:none}
.glass{background:rgba(255,255,255,.06);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border:1px solid var(--line);box-shadow:var(--shadow)}
.landing{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1.08fr) minmax(340px,.92fr);gap:28px;min-height:100vh;padding:28px}
.copy,.robot-stage{border-radius:28px;padding:28px}
.top-actions{display:flex;gap:12px;justify-content:flex-end;flex-wrap:wrap}
.ghost-link{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border-radius:999px;background:rgba(255,255,255,.05);border:1px solid var(--line);color:#d6efff}
.badge{display:inline-flex;align-items:center;gap:10px;padding:8px 14px;border-radius:999px;background:var(--theme-soft);border:1px solid rgba(255,255,255,.09);color:var(--theme);margin-top:10px}
h1{font-size:clamp(38px,5.8vw,76px);line-height:1.04;margin:18px 0 14px;letter-spacing:-.02em}
.copy>p{font-size:17px;line-height:1.85;color:var(--muted);max-width:880px}
.template-strip{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:22px 0}
.tpl-card{padding:16px 18px;border-radius:22px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.06)}
.tpl-card b{display:block;margin-bottom:8px;font-size:15px}.tpl-card span{color:#b5cfde;font-size:13px;line-height:1.6}
.domain-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:8px}
.domain-card{border:1px solid rgba(255,255,255,.07);background:rgba(255,255,255,.045);color:var(--text);border-radius:22px;padding:18px;text-align:left;cursor:pointer;transition:.3s;min-height:160px}
.domain-card:hover,.domain-card.active{transform:translateY(-4px);border-color:color-mix(in srgb,var(--theme) 50%, white 20%);box-shadow:0 20px 40px rgba(0,0,0,.2),0 0 0 1px rgba(255,255,255,.03) inset;background:linear-gradient(145deg,rgba(255,255,255,.08),rgba(255,255,255,.03))}
.domain-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;gap:12px}.domain-top span{font-size:12px;padding:6px 10px;border-radius:999px;background:var(--theme-soft);color:var(--theme)}
.domain-card p{margin:0 0 12px;color:#c8deea;line-height:1.7;font-size:14px}.domain-card small{color:#90aebf;line-height:1.6;display:block}
.robot-stage{position:relative;display:flex;flex-direction:column;justify-content:space-between;overflow:hidden}
.robot-tip-stack{position:absolute;inset:24px 24px auto auto;z-index:3;display:grid;gap:10px;width:min(260px,60%)}
.tip-bubble{padding:12px 16px;border-radius:18px;background:rgba(255,255,255,.88);color:#0c182a;font-weight:700;font-size:14px;box-shadow:0 12px 24px rgba(0,0,0,.18);animation:floatBubble 4s ease-in-out infinite}
.bubble-b{animation-delay:.8s}.bubble-c{animation-delay:1.6s}
.robot-zone{position:relative;display:grid;place-items:center;min-height:540px;padding-top:36px}
.halo{position:absolute;width:360px;height:360px;border-radius:50%;background:radial-gradient(circle,rgba(73,242,255,.22),transparent 60%);filter:blur(20px)}
.robot{border:0;background:transparent;cursor:pointer;position:relative;width:320px;height:420px;transform-style:preserve-3d;animation:floatRobot 5s ease-in-out infinite}
.robot-shadow{position:absolute;left:50%;bottom:16px;transform:translateX(-50%);width:180px;height:36px;border-radius:50%;background:rgba(0,0,0,.35);filter:blur(8px)}
.head,.torso,.arm,.leg,.ring{position:absolute}
.head{left:80px;top:34px;width:160px;height:120px;border-radius:36px;background:linear-gradient(145deg,var(--theme),var(--theme-2));box-shadow:inset -20px -20px 34px rgba(0,0,0,.18),0 0 40px rgba(73,242,255,.25)}
.head span{position:absolute;top:50px;width:18px;height:18px;border-radius:50%;background:#081120;box-shadow:0 0 12px #fff}
.head span:first-child{left:46px}.head span:nth-child(2){right:46px}
.head i{position:absolute;left:50%;top:-18px;width:6px;height:22px;background:var(--theme);border-radius:6px;transform:translateX(-50%)}
.torso{left:72px;top:166px;width:176px;height:150px;border-radius:42px;background:linear-gradient(145deg,rgba(12,27,48,.96),rgba(12,19,34,.86));border:1px solid rgba(255,255,255,.08)}
.core{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:68px;height:68px;border-radius:50%;background:radial-gradient(circle,var(--theme),rgba(73,242,255,.08));box-shadow:0 0 28px rgba(73,242,255,.35)}
.arm{top:188px;width:34px;height:122px;border-radius:999px;background:linear-gradient(180deg,var(--theme),rgba(255,255,255,.3))}.arm.left{left:42px;transform:rotate(16deg)}.arm.right{right:42px;transform:rotate(-16deg)}
.leg{top:312px;width:42px;height:96px;border-radius:999px;background:linear-gradient(180deg,rgba(255,255,255,.35),var(--theme-2))}.leg.left{left:118px}.leg.right{right:118px}
.ring{left:50%;top:206px;border:2px solid rgba(255,255,255,.2);border-radius:50%;transform-style:preserve-3d}.ring-1{width:268px;height:102px;transform:translateX(-50%) rotateX(76deg);border-color:rgba(73,242,255,.55);animation:spinRing 8s linear infinite}.ring-2{width:228px;height:84px;transform:translateX(-50%) rotateY(74deg);border-color:rgba(115,103,255,.42);animation:spinRingReverse 9s linear infinite}
.robot-caption{position:relative;z-index:2;text-align:center;color:#c4d7e4;font-size:14px;margin-top:-10px}
.chat-shell{position:relative;z-index:2;display:none;grid-template-columns:320px minmax(0,1fr);gap:18px;min-height:100vh;padding:18px}.chat-shell.show{display:grid}
.chat-sidebar,.chat-head,.messages,.composer{border-radius:24px}
.chat-sidebar{padding:18px;display:flex;flex-direction:column;gap:14px}
.side-head{display:flex;align-items:center;justify-content:space-between;gap:10px}.soft-btn{padding:10px 14px;border-radius:14px;border:1px solid rgba(255,255,255,.1);background:rgba(255,255,255,.06);color:var(--text);cursor:pointer}
.session-list{display:grid;gap:10px;max-height:calc(100vh - 240px);overflow:auto}.session-item{padding:14px;border-radius:18px;background:rgba(255,255,255,.05);border:1px solid transparent;cursor:pointer}.session-item:hover,.session-item.active{border-color:rgba(255,255,255,.12);background:rgba(255,255,255,.09)}.session-item b{display:block;margin-bottom:6px}.session-item small{color:var(--muted)}.guest-limit{margin-top:auto;color:#a9c0ce;font-size:13px;line-height:1.7}
.chat-main{display:flex;flex-direction:column;gap:16px;min-width:0}.chat-head{display:flex;justify-content:space-between;align-items:center;padding:18px 22px;gap:16px}.chat-head span{display:block;margin-top:4px;color:var(--muted)}.chat-tools{display:flex;gap:10px;flex-wrap:wrap}
.messages{flex:1;min-height:52vh;padding:18px;overflow:auto}.msg{max-width:82%;padding:14px 16px;border-radius:18px;margin:12px 0;line-height:1.8;white-space:pre-wrap;word-break:break-word}.msg.bot{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.07)}.msg.user{background:linear-gradient(135deg,var(--theme),var(--theme-2));color:#02111c;margin-left:auto}.msg-meta{font-size:12px;color:#9ec0d2;margin-top:8px}
.composer{padding:16px}.attach-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:12px}.file-pill{position:relative;overflow:hidden;display:inline-flex;align-items:center;padding:10px 14px;border-radius:999px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);cursor:pointer}.file-pill input{position:absolute;inset:0;opacity:0;cursor:pointer}.attach-name{color:var(--muted);font-size:13px}
textarea{width:100%;min-height:110px;border:1px solid rgba(255,255,255,.08);outline:0;background:rgba(4,10,19,.72);color:#fff;border-radius:18px;padding:16px;resize:vertical}
.actions{display:flex;justify-content:flex-end;margin-top:12px}button#sendBtn{border:0;border-radius:16px;padding:12px 26px;background:linear-gradient(135deg,var(--theme),var(--theme-2));color:#07111d;font-weight:800;cursor:pointer}
.share-page{min-height:100vh;display:grid;place-items:center;padding:24px}.share-card{width:min(920px,100%);padding:24px;border-radius:28px}.share-head{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:18px}.auth-form{display:grid;gap:14px}.auth-form label{display:grid;gap:8px;color:#dbeefc}.auth-form input{padding:12px 14px;border-radius:14px;border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.06);color:#fff}.auth-form button{margin-top:8px;border:0;border-radius:14px;padding:12px 18px;background:linear-gradient(135deg,var(--theme),var(--theme-2));font-weight:800;color:#02111d}.auth-error{padding:12px 14px;background:rgba(255,98,98,.12);border:1px solid rgba(255,98,98,.25);border-radius:14px;margin:12px 0}.auth-links{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
@keyframes floatRobot{0%,100%{transform:translateY(0) rotateY(-10deg)}50%{transform:translateY(-16px) rotateY(10deg)}}
@keyframes floatBubble{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
@keyframes spinRing{to{transform:translateX(-50%) rotateX(76deg) rotateZ(360deg)}}
@keyframes spinRingReverse{to{transform:translateX(-50%) rotateY(74deg) rotateZ(-360deg)}}
@media (max-width:1120px){.landing{grid-template-columns:1fr}.chat-shell.show{grid-template-columns:1fr}.chat-sidebar{order:2}.robot-stage{min-height:520px}}
@media (max-width:760px){.landing{padding:16px;gap:16px}.copy,.robot-stage,.chat-sidebar,.chat-head,.messages,.composer,.share-card{padding:18px;border-radius:22px}.template-strip,.domain-grid{grid-template-columns:1fr}.robot-zone{min-height:420px}.robot{width:250px;height:340px}.head{left:60px;top:28px;width:130px;height:96px}.head span{top:38px}.torso{left:54px;top:138px;width:142px;height:124px}.arm{top:158px;height:104px}.arm.left{left:30px}.arm.right{right:30px}.leg{top:260px;height:78px}.leg.left{left:92px}.leg.right{right:92px}.ring-1{width:208px}.ring-2{width:184px}.robot-tip-stack{inset:14px 14px auto auto;width:60%}.tip-bubble{font-size:12px;padding:10px 12px}.chat-shell{padding:12px}.chat-head{flex-direction:column;align-items:flex-start}.msg{max-width:95%}.attach-row{align-items:flex-start}}

/* v2.3.0 global polish */
html,body{user-select:none}button,.domain-card,.session-item,.ghost-link,.file-pill,.tpl-card,.glass{will-change:transform;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease,background .18s ease}button:hover,.ghost-link:hover,.file-pill:hover,.tpl-card:hover{transform:translateY(-2px) rotate(.2deg)}button:active,.ghost-link:active,.file-pill:active,.domain-card:active,.session-item:active{transform:translateY(1px) scale(.985);filter:saturate(1.18)}.glass{background:linear-gradient(145deg,rgba(255,255,255,.105),rgba(255,255,255,.035));backdrop-filter:blur(24px) saturate(128%);-webkit-backdrop-filter:blur(24px) saturate(128%);border:1px solid rgba(255,255,255,.14);box-shadow:0 28px 80px rgba(0,0,0,.42),inset 0 1px 0 rgba(255,255,255,.08)}input,select,textarea{appearance:none;-webkit-appearance:none}label{border-radius:16px}select{background-image:linear-gradient(45deg,transparent 50%,var(--theme) 50%),linear-gradient(135deg,var(--theme) 50%,transparent 50%);background-position:calc(100% - 18px) 52%,calc(100% - 12px) 52%;background-size:6px 6px;background-repeat:no-repeat}.global-thinking{position:fixed;inset:0;z-index:9999;display:none;place-items:center;background:rgba(3,8,18,.58);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px)}.global-thinking.show{display:grid}.global-thinking-card{display:grid;place-items:center;padding:28px 34px;border-radius:28px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);box-shadow:0 26px 80px rgba(0,0,0,.42)}.think-bot{position:relative;width:96px;height:86px;border-radius:28px;background:linear-gradient(135deg,var(--theme),var(--theme-2));animation:thinkPulse 1.1s ease-in-out infinite;box-shadow:0 0 34px color-mix(in srgb,var(--theme),transparent 45%)}.think-bot:before,.think-bot:after{content:"";position:absolute;top:38px;width:12px;height:12px;border-radius:50%;background:#06111f}.think-bot:before{left:28px}.think-bot:after{right:28px}.global-thinking-card p{margin:18px 0 0;color:#dcf8ff;font-weight:800}@keyframes thinkPulse{0%,100%{transform:translateY(0) rotate(-2deg)}50%{transform:translateY(-8px) rotate(2deg)}}
.profile-link{margin-top:20px;display:grid;gap:12px}.profile-link label{display:block;padding:14px;border:1px solid rgba(255,255,255,.12);border-radius:18px;background:rgba(255,255,255,.045);font-weight:800;color:#dceffd}.profile-link input{width:100%;margin-top:10px;padding:12px 14px;border-radius:14px;border:1px solid rgba(255,255,255,.12);background:rgba(3,10,20,.72);color:#fff}.copy-invite{border:0;border-radius:16px;padding:12px 18px;background:linear-gradient(135deg,var(--theme),var(--theme-2));font-weight:800;color:#02111d}.info-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.info-grid article{padding:16px;border-radius:18px;background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.1)}.info-grid article b{display:block;margin-bottom:8px}.info-grid article span{color:var(--muted);word-break:break-all}@media(max-width:640px){.info-grid{grid-template-columns:1fr}}