.app-shell{flex:1;display:flex;flex-direction:column}.app-header{display:flex;flex-direction:column;gap:14px;padding:16px 24px 0}.header-top{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.brand-line{display:flex;align-items:baseline;gap:12px;min-width:0}.brand-wrap{display:inline-flex;align-items:center;gap:10px;text-decoration:none}.brand-logo{width:36px;height:36px;border-radius:10px;object-fit:cover;flex-shrink:0}.brand{font-size:22px;font-weight:700;color:var(--primary);white-space:nowrap}.brand-sub{font-size:13px;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.lang-switch{display:flex;gap:4px;background:var(--card-bg);padding:4px;border-radius:10px;box-shadow:var(--shadow);flex-shrink:0}.lang-btn{padding:5px 10px;border:none;border-radius:7px;background:transparent;color:var(--text-muted);font-size:13px;font-weight:600;transition:all .2s}.lang-btn:hover{color:var(--primary)}.lang-btn.active{background:var(--primary);color:#fff}.tabs{display:flex;gap:8px;align-self:center;background:var(--card-bg);padding:6px;border-radius:12px;box-shadow:var(--shadow)}.tab{padding:8px 22px;border-radius:8px;font-size:14px;font-weight:600;color:var(--text-muted);transition:all .2s}.tab:hover{color:var(--primary)}.tab.active{background:var(--primary);color:#fff}.app-main{flex:1;display:flex;align-items:flex-start;justify-content:center;padding:16px 16px 24px}.app-footer{text-align:center;padding:14px;font-size:12px;color:var(--text-muted)}.upload-card{width:100%;max-width:460px;background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);padding:32px 28px;text-align:center}.title{font-size:20px;font-weight:700}.subtitle{margin-top:8px;font-size:14px;color:var(--text-muted)}.dropzone{margin-top:24px;border:2px dashed var(--border);border-radius:var(--radius);padding:36px 16px;transition:all .2s}.dropzone:hover,.dropzone.dragover{border-color:var(--primary);background:#4f6ef70a}.hidden-input{display:none}.dropzone-icon{font-size:40px}.dropzone-text{margin-top:12px;font-size:14px;color:var(--text-muted)}.dropzone-text.selected{color:var(--text);font-weight:600;word-break:break-all}.file-size{color:var(--text-muted);font-weight:400}.progress{position:relative;margin-top:20px;height:10px;background:var(--border);border-radius:6px;overflow:hidden}.progress-bar{height:100%;background:var(--primary);transition:width .2s}.progress-text{position:absolute;right:0;top:14px;font-size:12px;color:var(--text-muted)}.error-msg{margin-top:16px;color:var(--danger);font-size:13px}.btn-primary{margin-top:24px;width:100%;padding:13px;border:none;border-radius:10px;background:var(--primary);color:#fff;font-size:15px;font-weight:600;transition:background .2s}.qr-wrapper{margin:24px auto 0;display:inline-flex;padding:16px;background:#fff;border:1px solid var(--border);border-radius:var(--radius)}.result-info{margin-top:24px;text-align:left}.info-row{display:flex;justify-content:space-between;align-items:center;padding:10px 0;border-bottom:1px solid var(--border)}.info-label{font-size:13px;color:var(--text-muted)}.info-value{font-size:14px;font-weight:600;word-break:break-all;text-align:right;margin-left:12px}.info-value.code{letter-spacing:2px;color:var(--primary);font-size:18px}.info-value.expired{color:var(--danger)}.link-box{margin-top:20px;display:flex;gap:8px}.link-input{flex:1;padding:10px 12px;border:1px solid var(--border);border-radius:8px;font-size:12px;color:var(--text-muted);background:var(--bg)}.btn-copy{padding:10px 14px;border:1px solid var(--primary);border-radius:8px;background:#fff;color:var(--primary);font-size:13px;white-space:nowrap}.btn-ghost{margin-top:20px;width:100%;padding:12px;border:1px solid var(--border);border-radius:10px;background:#fff;color:var(--text);font-size:14px}.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}.receive-card{width:100%;max-width:440px;background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px 24px;text-align:center}.title{font-size:19px;font-weight:700}.subtitle{margin-top:6px;font-size:13px;color:var(--text-muted)}.step{margin-top:14px;padding:14px;background:var(--bg);border-radius:12px}.step-head{display:flex;align-items:center;gap:10px;text-align:left}.step-no{flex-shrink:0;width:24px;height:24px;border-radius:50%;background:var(--primary);color:#fff;font-size:14px;font-weight:700;line-height:24px;text-align:center}.step-text{font-size:14px;font-weight:600;color:var(--text)}.qr-wrapper{margin:12px auto 0;display:inline-flex;padding:8px;background:#fff;border:1px solid var(--border);border-radius:10px}.qr-url{margin-top:8px;font-size:11px;color:var(--text-muted);word-break:break-all}.code-form{margin-top:12px}.code-input{width:100%;box-sizing:border-box;padding:12px;border:2px solid var(--border);border-radius:12px;font-size:24px;font-weight:700;letter-spacing:8px;text-align:center;text-transform:uppercase;color:var(--text);transition:border-color .2s}.code-input:focus{outline:none;border-color:var(--primary)}.error-msg{margin-top:12px;color:var(--danger);font-size:13px}.btn-primary{margin-top:12px;width:100%;padding:12px;border:none;border-radius:10px;background:var(--primary);color:#fff;font-size:15px;font-weight:600;transition:background .2s}.btn-primary:hover:not(:disabled){background:var(--primary-dark)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.hint{margin-top:14px;font-size:12px;line-height:1.5}.download-card{width:100%;max-width:400px;background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);padding:40px 28px}.state-box{text-align:center}.state-icon,.file-icon{font-size:48px}.state-title{margin-top:12px;font-size:18px;font-weight:700}.state-desc{margin-top:8px;font-size:14px;color:var(--text-muted)}.state-box.error .state-desc{color:var(--danger)}.file-name{margin-top:16px;font-size:17px;font-weight:700;word-break:break-all}.file-meta{margin-top:8px;font-size:14px;color:var(--text-muted)}.file-meta.expired{color:var(--danger)}.btn-download{display:block;box-sizing:border-box;margin-top:28px;width:100%;padding:14px;border:none;border-radius:10px;background:var(--success);color:#fff;font-size:16px;font-weight:600;text-align:center;text-decoration:none;cursor:pointer}.btn-download:disabled{opacity:.5;cursor:not-allowed}.hint{margin-top:16px;font-size:13px;color:var(--success)}.hint.tip{color:var(--text-muted)}.spinner{width:36px;height:36px;margin:0 auto;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}*{margin:0;padding:0;box-sizing:border-box}:root{--primary: #4f6ef7;--primary-dark: #3d59e0;--bg: #f5f7fb;--card-bg: #ffffff;--text: #1f2437;--text-muted: #8a90a2;--border: #e6e9f0;--success: #21ba7b;--danger: #e2574c;--radius: 14px;--shadow: 0 10px 30px rgba(31, 36, 55, .08)}html,body{height:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Hiragino Kaku Gothic ProN,Yu Gothic,Meiryo,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;overflow-x:hidden}#app{min-height:100vh;min-height:100dvh;display:flex;flex-direction:column}button{font-family:inherit;cursor:pointer}a{color:var(--primary);text-decoration:none}