.welcome-section{margin-block:36px}.welcome-section-heading{justify-content:space-between;align-items:flex-start;gap:18px;margin-bottom:18px;display:flex}.welcome-section-heading h2{align-items:center;gap:9px;font-size:21px;display:flex}.welcome-section-heading p,.welcome-footnote,.welcome-explainer,.welcome-editor-intro,.welcome-class-editor>p{color:var(--muted);font-size:13px;line-height:1.8}.welcome-section-heading p{margin-top:7px}.welcome-manage-link{flex-shrink:0;align-items:center;gap:6px;min-height:44px;padding-block:5px;font-size:13px;display:inline-flex}.welcome-letter-list{border-top:1px solid var(--border)}.welcome-letter{border-bottom:1px solid var(--border)}.welcome-letter-toggle{text-align:left;align-items:center;gap:20px;width:100%;min-height:88px;padding:21px 4px;display:flex}.welcome-letter-toggle:hover{background:var(--tint)}.welcome-letter-name{flex:0 0 165px;font-size:18px;font-weight:650}.welcome-letter-name>span{color:var(--muted);margin-top:5px;font-size:12px;font-weight:400;display:block}.welcome-letter-summary{flex:1;min-width:0}.welcome-letter-summary strong{overflow-wrap:anywhere;font-size:15px;font-weight:550;display:block}.welcome-letter-summary>span{color:var(--muted);margin-top:4px;font-size:12px;display:block}.welcome-chevron--open{transform:rotate(180deg)}.welcome-letter-content{padding:0 4px 22px}.welcome-explainer{background:var(--tint);border-radius:12px;align-items:flex-start;gap:8px;padding:15px 18px;display:flex}.welcome-explainer svg{margin-top:4px}.welcome-footnote{margin-top:14px;font-size:12px}.welcome-text-button{text-underline-offset:4px;align-items:center;gap:6px;min-height:44px;padding:4px 0;text-decoration:underline;display:inline-flex}.welcome-loading,.welcome-load-error{color:var(--muted);padding:24px 0;font-size:14px}.welcome-manage-main{max-width:820px;padding-top:24px}.welcome-manage-heading{margin-bottom:32px}.welcome-manage-heading h1{font-size:30px}.welcome-manage-heading p{color:var(--muted);margin-top:12px;line-height:1.8}.welcome-class-editor{border-bottom:1px solid var(--border);margin-bottom:24px;padding-bottom:28px}.welcome-class-editor h2{margin-bottom:8px;font-size:21px}.welcome-class-fields{grid-template-columns:1.25fr 1fr;gap:20px;display:grid}.welcome-save{margin-top:22px}.welcome-editor{border-bottom:1px solid var(--border)}.welcome-editor summary{cursor:pointer;justify-content:space-between;align-items:center;gap:18px;min-height:90px;padding:23px 4px;list-style:none;display:flex}.welcome-editor summary::-webkit-details-marker{display:none}.welcome-editor summary strong{font-size:20px}.welcome-editor summary>span:first-child>span{color:var(--muted);overflow-wrap:anywhere;margin-top:5px;font-size:13px;display:block}.welcome-editor summary:after{content:"展开";color:var(--accent-ink);font-size:12px}.welcome-editor[open] summary:after{content:"收起"}.welcome-editor-state{color:var(--muted);flex-shrink:0;margin-left:auto;font-size:13px}.welcome-editor-body{padding:0 4px 28px}.welcome-textarea{resize:vertical;background:var(--surface);width:100%;min-height:180px;color:var(--ink);caret-color:var(--accent-ink);border:1px solid #bca697;border-radius:10px;padding:14px;font-size:16px;line-height:1.8;display:block}.welcome-upload{cursor:pointer;overflow-wrap:anywhere;border:1px dashed #bca697;border-radius:10px;align-items:center;gap:10px;min-height:74px;padding:16px;font-size:14px;display:flex}.welcome-file-input{width:100%;margin-top:12px;font-size:13px}.welcome-publish-panel{border-top:1px solid var(--border);margin-top:24px;padding-top:4px}.welcome-publish-panel .primary-button{width:auto;min-height:48px}.welcome-admin-preview{margin-top:24px}.welcome-admin-preview h3{margin-bottom:14px;font-size:15px}.welcome-ai-disclosure{color:var(--accent-ink);background:var(--tint);border-radius:12px;margin-bottom:18px;padding:12px 14px;font-size:13px;line-height:1.8}.welcome-audio-source{color:var(--muted);margin-top:12px;font-size:12px;line-height:1.8}.welcome-publish-panel .checkbox-field+.checkbox-field{margin-top:0}.welcome-notice{color:var(--accent-ink);margin-top:14px;font-size:14px}@media (max-width:640px){.welcome-section-heading{display:block}.welcome-manage-link{margin-top:6px}.welcome-letter-toggle{gap:12px;padding-block:19px}.welcome-letter-name{flex-basis:126px;font-size:17px}.welcome-letter-name>span{font-size:11px}.welcome-letter-summary strong{font-size:14px}.welcome-section-heading h2{font-size:20px}.welcome-class-fields{grid-template-columns:1fr;gap:0}.welcome-manage-heading h1{font-size:26px}.welcome-editor summary{gap:10px}.welcome-editor-state{font-size:12px}.welcome-publish-panel .primary-button{width:100%}}.welcome-card-dialog{background:var(--surface);width:min(600px,100% - 32px);max-height:85dvh;color:var(--ink);border:0;border-radius:28px;margin:auto;padding:32px 24px 24px;position:fixed;inset:0;overflow-y:auto;box-shadow:0 18px 60px #38261926}.welcome-card-dialog::backdrop{background:#30251d66}.welcome-dialog-close{position:absolute;top:12px;right:12px}.welcome-dialog-heading{margin-bottom:24px;padding-right:32px}.welcome-dialog-heading>span{color:var(--muted);font-size:12px;line-height:1.8}.welcome-dialog-heading h2{overflow-wrap:anywhere;margin-top:8px;font-size:24px;line-height:1.4}@media (max-width:640px){.welcome-card-dialog{width:100%;max-width:none;max-height:88dvh;padding:32px 20px max(24px,env(safe-area-inset-bottom));border-radius:28px 28px 0 0;margin:0;inset:auto 0 0}}