@import url("https://fonts.googleapis.com/css2?family=Zcool+XiaoWei&family=Noto+Sans+SC:wght@400;500;700&display=swap");:root{--bg:#fdf8f5;--bg-card:#fff;--primary:#ff6b6b;--primary-hover:#ff5252;--secondary:#4ecdc4;--secondary-hover:#3dbdb5;--text:#2d3436;--text-secondary:#636e72;--text-light:#b2bec3;--accent:#ffe66d;--success:#00b894;--error:#e17055;--border:#dfe6e9;--shadow:hsla(0,100%,71%,.1);--shadow-lg:hsla(0,100%,71%,.15)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Noto Sans SC,-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;display:flex;flex-direction:column;line-height:1.6;background-image:radial-gradient(circle at 20% 80%,rgba(78,205,196,.08) 0,transparent 50%),radial-gradient(circle at 80% 20%,hsla(0,100%,71%,.08) 0,transparent 50%),radial-gradient(circle at 50% 50%,rgba(255,230,109,.05) 0,transparent 70%)}.container{max-width:520px;margin:0 auto;padding:2.5rem 1.5rem;flex:1 1;display:flex;flex-direction:column;justify-content:center}.hero{text-align:center;margin-bottom:2.5rem;animation:fadeInUp .8s ease-out}.lang-switch{display:flex;gap:.5rem;justify-content:flex-end;margin-bottom:1rem}.lang-switch button{padding:.375rem .75rem;background:transparent;border:1px solid var(--border);border-radius:6px;font-size:.875rem;color:var(--text-secondary);cursor:pointer;transition:all .2s;width:auto}.lang-switch button:hover{border-color:var(--primary);color:var(--primary)}.lang-switch button.active{background:var(--primary);color:#fff;border-color:var(--primary)}.logo{display:inline-flex;align-items:center;justify-content:center;width:80px;height:80px;background:linear-gradient(135deg,var(--primary) 0,var(--secondary) 100%);border-radius:24px;margin-bottom:1.25rem;box-shadow:0 8px 32px var(--shadow-lg);animation:float 3s ease-in-out infinite}.logo svg{width:44px;height:44px;fill:#fff}.hero h1{font-family:Zcool XiaoWei,serif;font-size:2.5rem;font-weight:400;color:var(--text);margin-bottom:.5rem;letter-spacing:.05em}.hero p{font-size:1.1rem;color:var(--text-secondary);max-width:320px;margin:0 auto}.form-card{background:var(--bg-card);padding:2rem;border-radius:24px;box-shadow:0 4px 24px var(--shadow),0 12px 48px var(--shadow-lg);animation:fadeInUp .8s ease-out .2s both}.form-card:before{content:"";position:absolute;top:-1px;left:50%;transform:translateX(-50%);width:60%;height:4px;background:linear-gradient(90deg,var(--primary),var(--secondary));border-radius:0 0 4px 4px}.form-card{position:relative;overflow:hidden}.message{padding:1rem 1.25rem;border-radius:12px;margin-bottom:1.5rem;font-size:.95rem;display:flex;align-items:center;gap:.75rem;animation:shake .5s ease-out}.message.success{background:linear-gradient(135deg,rgba(0,184,148,.1),rgba(0,184,148,.05));color:var(--success);border:1px solid rgba(0,184,148,.3)}.message.error{background:linear-gradient(135deg,rgba(225,112,85,.1),rgba(225,112,85,.05));color:var(--error);border:1px solid rgba(225,112,85,.3)}.message svg{width:20px;height:20px;flex-shrink:0}.form-group{margin-bottom:1.5rem}.form-group label{display:block;font-size:.9rem;font-weight:500;color:var(--text);margin-bottom:.5rem;display:flex;align-items:center;gap:.5rem}.form-group label svg{width:18px;height:18px;color:var(--primary)}.form-group label .tooltip-trigger{position:relative;display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px;margin-left:.25rem;color:var(--text-light);cursor:help;transition:color .2s}.form-group label .tooltip-trigger:hover{color:var(--secondary)}.form-group label .tooltip-trigger svg{width:16px;height:16px}.form-group label .tooltip-content{position:absolute;bottom:calc(100% + 8px);left:50%;transform:translateX(-50%);width:220px;padding:.75rem 1rem;background:var(--text);color:#fff;font-size:.8rem;font-weight:400;line-height:1.4;border-radius:10px;opacity:0;visibility:hidden;transition:all .2s ease;z-index:100;box-shadow:0 4px 16px rgba(0,0,0,.2)}.form-group label .tooltip-content:after{content:"";position:absolute;top:100%;left:50%;transform:translateX(-50%);border:6px solid transparent;border-top:6px solid var(--text)}.form-group label .tooltip-trigger:hover .tooltip-content{opacity:1;visibility:visible;transform:translateX(-50%) translateY(-4px)}.form-group input{width:100%;padding:1rem 1.25rem;border:2px solid var(--border);border-radius:14px;font-size:1rem;transition:all .3s ease;background:var(--bg);color:var(--text)}.form-group input::placeholder{color:var(--text-light)}.form-group input:focus{outline:none;border-color:var(--secondary);box-shadow:0 0 0 4px rgba(78,205,196,.15);background:#fff}.form-group input:invalid:not(:placeholder-shown){border-color:var(--error)}button{width:100%;padding:1.125rem 2rem;background:linear-gradient(135deg,var(--primary) 0,#ff8e8e 100%);color:#fff;border:none;border-radius:14px;font-size:1.1rem;font-weight:500;cursor:pointer;transition:all .3s ease;position:relative;overflow:hidden}button:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,hsla(0,0%,100%,.2),transparent);transition:left .5s ease}button:hover{transform:translateY(-2px);box-shadow:0 8px 24px var(--shadow-lg)}button:hover:before{left:100%}button:active{transform:translateY(0)}button:disabled{background:var(--border);color:var(--text-light);cursor:not-allowed;transform:none;box-shadow:none}button:disabled:hover:before{display:none}.instructions{margin-top:2rem;padding:1.25rem;background:linear-gradient(135deg,rgba(78,205,196,.08),rgba(78,205,196,.03));border-radius:14px;border:1px solid rgba(78,205,196,.2)}.instructions p{font-size:.875rem;color:var(--text-secondary);display:flex;align-items:flex-start;gap:.5rem}.instructions svg{width:16px;height:16px;color:var(--secondary);flex-shrink:0;margin-top:.2rem}footer{text-align:center;padding:1.5rem;color:var(--text-light);font-size:.8rem}footer a{color:var(--primary);text-decoration:none}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}@keyframes shake{0%,to{transform:translateX(0)}20%,60%{transform:translateX(-4px)}40%,80%{transform:translateX(4px)}}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}.spinner{display:inline-block;width:20px;height:20px;border-radius:50%;border:2px solid hsla(0,0%,100%,.3);border-top-color:#fff;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(1turn)}}.decoration{position:fixed;pointer-events:none;z-index:-1}.decoration-1{top:10%;left:5%;width:120px;height:120px;background:radial-gradient(circle,rgba(255,230,109,.3) 0,transparent 70%);border-radius:50%;animation:float 4s ease-in-out infinite}.decoration-2{bottom:15%;right:8%;width:80px;height:80px;background:radial-gradient(circle,rgba(78,205,196,.25) 0,transparent 70%);border-radius:50%;animation:float 5s ease-in-out 1s infinite}.decoration-3{top:40%;right:15%;width:60px;height:60px;background:radial-gradient(circle,hsla(0,100%,71%,.2) 0,transparent 70%);border-radius:50%;animation:float 6s ease-in-out .5s infinite}@media (max-width:480px){.container{padding:1.5rem 1rem}.hero h1{font-size:2rem}.form-card{padding:1.5rem}.form-card,.logo{border-radius:20px}.logo{width:64px;height:64px}.logo svg{width:36px;height:36px}}.tag-input-container{width:100%}.tag-input-container .tags{display:flex;flex-wrap:wrap;gap:.5rem;padding:.75rem 1rem;background:var(--bg);border:2px solid var(--border);border-radius:14px;min-height:52px;transition:all .3s ease}.tag-input-container .tags:focus-within{border-color:var(--secondary);box-shadow:0 0 0 4px rgba(78,205,196,.15);background:#fff}.tag-input-container .tag{display:inline-flex;align-items:center;gap:.375rem;padding:.375rem .75rem;background:linear-gradient(135deg,var(--secondary) 0,#6ee7de 100%);color:#fff;border-radius:20px;font-size:.875rem;font-weight:500;animation:tagPop .2s ease-out}.tag-input-container .tag button{display:flex;align-items:center;justify-content:center;width:18px;height:18px;padding:0;background:hsla(0,0%,100%,.25);border:none;border-radius:50%;color:#fff;font-size:.875rem;line-height:1;cursor:pointer;transition:all .2s}.tag-input-container .tag button:hover{background:hsla(0,0%,100%,.4);transform:scale(1.1)}.tag-input-container .tag-input{flex:1 1;min-width:120px;border:none;background:transparent;padding:.25rem 0;font-size:1rem}.tag-input-container .tag-input:focus{outline:none;box-shadow:none}.tag-input-container .tag-input::placeholder{color:var(--text-light)}@keyframes tagPop{0%{opacity:0;transform:scale(.8) translateY(-4px)}to{opacity:1;transform:scale(1) translateY(0)}}