/**
 * 图灵助手 · 企业级界面
 * 视觉参考：腾讯 TDesign + 飞书文档 / 腾讯文档编辑器
 * https://tdesign.tencent.com/
 */
:root {
    --td-brand: #0052D9;
    --td-brand-hover: #366EF4;
    --td-brand-active: #003CAB;
    --td-brand-disabled: #B5C7FF;
    --td-brand-light: #F2F3FF;
    --td-brand-focus: #D9E1FF;
    --td-success: #2BA471;
    --td-warning: #E37318;
    --td-error: #D54941;
    --td-text: rgba(0, 0, 0, 0.9);
    --td-text-2: rgba(0, 0, 0, 0.6);
    --td-text-3: rgba(0, 0, 0, 0.4);
    --td-border: #DCDCDC;
    --td-border-hover: #BBBBBB;
    --td-bg-page: #F3F3F3;
    --td-bg-container: #FFFFFF;
    --td-radius: 3px;
    --td-radius-md: 6px;
    --td-radius-lg: 9px;
    --td-shadow-1: 0 1px 10px rgba(0, 0, 0, 0.05), 0 4px 5px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.12);
    --td-shadow-2: 0 3px 14px 2px rgba(0, 0, 0, 0.05), 0 8px 10px 1px rgba(0, 0, 0, 0.06), 0 5px 5px -3px rgba(0, 0, 0, 0.1);
    --font-sans: "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
    --font-display: "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", system-ui, sans-serif;
    --primary: var(--td-brand);
    --primary-dark: var(--td-brand-active);
    --primary-soft: var(--td-brand-light);
    --success: var(--td-success);
    --danger: var(--td-error);
    --bg: var(--td-bg-page);
    --card-bg: var(--td-bg-container);
    --text: var(--td-text);
    --text-light: var(--td-text-2);
    --border: var(--td-border);
    --radius: var(--td-radius-lg);
    --radius-sm: var(--td-radius-md);
    --shadow: var(--td-shadow-1);
}

body {
    font-family: var(--font-sans);
    background: var(--td-bg-page);
    color: var(--td-text);
    font-size: 14px;
    line-height: 1.57;
}

/* —— 按钮：TDesign 中尺寸，圆角 3px 而不是胶囊 —— */
.btn {
    height: 32px;
    padding: 0 16px;
    border-radius: var(--td-radius);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0;
    box-shadow: none;
    transform: none !important;
}
.btn-lg { height: 40px; padding: 0 24px; font-size: 16px; border-radius: var(--td-radius-md); }
.btn-sm { height: 28px; padding: 0 12px; font-size: 12px; }
.btn-primary { background: var(--td-brand); color: #fff; }
.btn-primary:hover { background: var(--td-brand-hover); color: #fff; }
.btn-primary:active { background: var(--td-brand-active); }
.btn-success { background: var(--td-success); color: #fff; }
.btn-success:hover { background: #25935F; color: #fff; }
.btn-secondary {
    background: #fff;
    color: var(--td-text);
    border: 1px solid var(--td-border);
}
.btn-secondary:hover {
    background: #fff;
    color: var(--td-brand);
    border-color: var(--td-brand);
}

/* —— 卡片 —— */
.card {
    border-radius: var(--td-radius-md);
    border: 1px solid #E7E7E7;
    box-shadow: none;
    padding: 20px 24px;
}

/* —— 表单：TDesign Input —— */
.form-group label {
    color: var(--td-text);
    font-size: 14px;
    font-weight: 400;
    margin-bottom: 8px;
}
.form-group input,
.form-group select,
.form-group textarea,
.forum-search input {
    height: 32px;
    padding: 0 12px;
    border: 1px solid var(--td-border);
    border-radius: var(--td-radius);
    font-size: 14px;
    color: var(--td-text);
    background: #fff;
    box-shadow: none;
    transition: border-color .15s, box-shadow .15s;
}
.form-group textarea { height: auto; padding: 8px 12px; min-height: 88px; }
.form-group input::placeholder,
.form-group textarea::placeholder,
.forum-search input::placeholder {
    color: var(--td-text-3);
}
.form-group input:hover,
.form-group select:hover,
.form-group textarea:hover,
.forum-search input:hover {
    border-color: var(--td-border-hover);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus,
.forum-search input:focus {
    border-color: var(--td-brand);
    box-shadow: 0 0 0 2px var(--td-brand-focus);
}

.alert {
    border-radius: var(--td-radius);
    padding: 10px 12px;
    font-size: 14px;
    margin-bottom: 16px;
}
.alert-error { background: #FFF0ED; color: #B42318; border: 1px solid #FFD4CC; }
.alert-success { background: #E8F8F2; color: #067647; border: 1px solid #C6F0DE; }
.alert-warning { background: #FFF1E9; color: #B54708; border: 1px solid #FFD9C2; }

/* —— 论坛列表工具条 —— */
.forum-toolbar {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
}
.td-seg {
    display: inline-flex;
    border: 1px solid var(--td-border);
    border-radius: var(--td-radius);
    overflow: hidden;
    background: #fff;
}
.td-seg .btn {
    border-radius: 0;
    border: 0;
    border-right: 1px solid var(--td-border);
    background: #fff;
    color: var(--td-text);
    height: 32px;
}
.td-seg .btn:last-child { border-right: 0; }
.td-seg .btn-primary,
.td-seg .btn.btn-primary {
    background: var(--td-brand-light);
    color: var(--td-brand);
    font-weight: 600;
}
.td-seg .btn-secondary:hover { background: #F3F3F3; color: var(--td-text); }
.forum-search {
    display: flex;
    gap: 8px;
    align-items: center;
}
.forum-search input { width: 220px; }

.thread-list .thread-item {
    padding: 14px 4px;
    border-bottom: 1px solid #E7E7E7;
    transition: background .15s;
    margin: 0 -8px;
    padding-left: 8px;
    padding-right: 8px;
    border-radius: var(--td-radius);
}
.thread-list .thread-item:hover { background: #F8F8F8; }
.thread-title { font-size: 15px; font-weight: 500; }
.thread-meta .tag {
    border-radius: var(--td-radius);
    background: var(--td-brand-light);
    color: var(--td-brand);
    padding: 1px 6px;
    font-size: 12px;
}

/* =========================================================
   发帖编辑器：飞书文档 / 腾讯文档
   ========================================================= */
.composer {
    max-width: 920px;
    margin: 0 auto;
    padding: 0 20px 48px;
}
.composer-bar {
    position: sticky;
    top: 68px;
    z-index: 40;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    height: 56px;
    margin: 0 -20px 16px;
    padding: 0 20px;
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid #E7E7E7;
}
.composer-back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--td-text-2);
    font-size: 14px;
    text-decoration: none;
}
.composer-back:hover { color: var(--td-brand); }
.composer-back svg { display: block; }
.composer-bar-actions { display: flex; gap: 8px; align-items: center; }

.composer-paper {
    background: #fff;
    border: 1px solid #E7E7E7;
    border-radius: var(--td-radius-lg);
    padding: 8px 0 28px;
    min-height: 62vh;
}
.composer-board {
    padding: 16px 32px 0;
}
.composer-board-select {
    height: 28px;
    padding: 0 10px;
    border: 1px solid var(--td-border);
    border-radius: 99px;
    background: #F8F8F8;
    font-size: 12px;
    color: var(--td-text-2);
    outline: none;
    max-width: 240px;
}
.composer-board-select:hover,
.composer-board-select:focus {
    border-color: var(--td-brand);
    color: var(--td-brand);
    background: var(--td-brand-light);
}

.composer-title {
    display: block;
    width: 100%;
    border: 0 !important;
    outline: none !important;
    box-shadow: none !important;
    background: transparent !important;
    padding: 12px 32px 8px !important;
    height: auto !important;
    font-size: 28px !important;
    font-weight: 650 !important;
    line-height: 1.35 !important;
    letter-spacing: -0.02em;
    color: var(--td-text);
    font-family: inherit;
}
.composer-title::placeholder { color: var(--td-text-3); font-weight: 500; }

.composer-hint {
    margin: 12px 32px 0;
    font-size: 12px;
    color: var(--td-text-3);
}

/* 编辑器本体 */
.forum-editor {
    border: 0;
    border-radius: 0;
    background: transparent;
    overflow: visible;
}
.forum-editor .ql-toolbar.ql-snow {
    position: sticky;
    top: 124px;
    z-index: 30;
    border: 0;
    border-top: 1px solid #F0F0F0;
    border-bottom: 1px solid #F0F0F0;
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(12px);
    padding: 6px 24px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 2px 0;
}
.forum-editor .ql-toolbar.ql-snow .ql-formats {
    margin-right: 8px;
    padding-right: 8px;
    border-right: 1px solid #EDEDED;
    display: inline-flex;
    align-items: center;
    gap: 2px;
}
.forum-editor .ql-toolbar.ql-snow .ql-formats:last-child {
    border-right: 0;
    margin-right: 0;
    padding-right: 0;
}
.ql-snow.ql-toolbar button,
.ql-snow .ql-toolbar button {
    width: 28px;
    height: 28px;
    padding: 4px;
    border-radius: var(--td-radius);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.ql-snow.ql-toolbar button:hover,
.ql-snow .ql-toolbar button:hover {
    background: #F3F3F3;
    color: var(--td-text);
}
.ql-snow.ql-toolbar button.ql-active,
.ql-snow .ql-toolbar button.ql-active {
    background: var(--td-brand-light);
}
.ql-snow .ql-stroke { stroke: #5C5C5C; }
.ql-snow .ql-fill { fill: #5C5C5C; }
.ql-snow .ql-picker { color: #5C5C5C; }
.ql-snow.ql-toolbar button.ql-active .ql-stroke,
.ql-snow .ql-toolbar button.ql-active .ql-stroke { stroke: var(--td-brand); }
.ql-snow.ql-toolbar button.ql-active .ql-fill,
.ql-snow .ql-toolbar button.ql-active .ql-fill { fill: var(--td-brand); }

.ql-snow .ql-picker.ql-header {
    width: 88px;
}
.ql-snow .ql-picker.ql-header .ql-picker-label {
    height: 28px;
    border: 0;
    border-radius: var(--td-radius);
    padding: 0 8px;
    display: flex;
    align-items: center;
}
.ql-snow .ql-picker.ql-header .ql-picker-label:hover {
    background: #F3F3F3;
}
.ql-snow .ql-picker-options {
    border: 1px solid #E7E7E7 !important;
    border-radius: var(--td-radius-md) !important;
    box-shadow: var(--td-shadow-2) !important;
    padding: 6px !important;
}
.ql-snow .ql-picker-item:hover {
    background: #F3F3F3;
    color: var(--td-brand);
}

.forum-editor .ql-container.ql-snow {
    border: 0;
    font-family: var(--font-sans);
    font-size: 16px;
    min-height: 360px;
}
.forum-editor .ql-editor {
    min-height: 360px;
    padding: 20px 32px 48px;
    line-height: 1.75;
    color: var(--td-text);
}
.forum-editor .ql-editor.ql-blank::before {
    color: var(--td-text-3);
    font-style: normal;
    left: 32px;
    right: 32px;
    font-size: 16px;
}
.forum-editor .ql-editor h1 { font-size: 26px; font-weight: 650; margin: 18px 0 10px; }
.forum-editor .ql-editor h2 { font-size: 22px; font-weight: 650; margin: 16px 0 8px; }
.forum-editor .ql-editor h3 { font-size: 18px; font-weight: 600; margin: 14px 0 8px; }
.forum-editor .ql-editor p { margin: 0 0 10px; }
.forum-editor .ql-editor blockquote {
    border-left: 3px solid var(--td-brand);
    background: #F8F9FB;
    margin: 12px 0;
    padding: 8px 14px;
    color: var(--td-text-2);
}

.forum-editor-compact {
    border: 1px solid var(--td-border);
    border-radius: var(--td-radius-md);
    overflow: hidden;
    background: #fff;
}
.forum-editor-compact .ql-toolbar.ql-snow {
    position: static;
    top: auto;
    padding: 4px 10px;
    background: #FAFAFA;
}
.forum-editor-compact .ql-container.ql-snow,
.forum-editor-compact .ql-editor {
    min-height: 140px;
}
.forum-editor-compact .ql-editor {
    padding: 12px 14px 20px;
    font-size: 14px;
}
.forum-editor-compact .ql-editor.ql-blank::before {
    left: 14px;
    font-size: 14px;
}

/* 链接气泡：TDesign 弹出层 */
.ql-snow .ql-tooltip {
    border: 1px solid #E7E7E7 !important;
    border-radius: var(--td-radius-md) !important;
    box-shadow: var(--td-shadow-2) !important;
    padding: 8px 10px !important;
    background: #fff !important;
    z-index: 60;
}
.ql-snow .ql-tooltip input[type="text"] {
    border: 1px solid var(--td-border);
    border-radius: var(--td-radius);
    height: 28px;
    padding: 0 8px;
    font-size: 13px;
}
.ql-snow .ql-tooltip a.ql-action,
.ql-snow .ql-tooltip a.ql-remove {
    color: var(--td-brand);
}

/* 帖子阅读：腾讯文档正文 */
.post-content,
.reply-content {
    font-size: 16px;
    line-height: 1.75;
    color: var(--td-text);
}
.post-content img, .reply-content img, .ql-editor img {
    border-radius: var(--td-radius-md);
    border: 1px solid #F0F0F0;
}

.pagination a,
.pagination span {
    border-radius: var(--td-radius);
    min-width: 32px;
    height: 32px;
    padding: 0 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.pagination .current {
    background: var(--td-brand);
}

@media (max-width: 768px) {
    .composer-title { font-size: 22px !important; padding: 10px 16px 6px !important; }
    .composer-board, .composer-hint { padding-left: 16px; padding-right: 16px; }
    .forum-editor .ql-editor { padding: 16px; }
    .forum-editor .ql-editor.ql-blank::before { left: 16px; right: 16px; }
    .forum-editor .ql-toolbar.ql-snow { padding: 6px 8px; top: 124px; }
    .composer-bar { top: 68px; }
    .forum-search input { width: 140px; }
}

/* SaaS density — appended 20260816 */
.forum-layout .container,
.board-page .container {
  max-width: 1120px;
}
.board-list,
.forum-boards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 0.85rem;
}
.board-item,
.forum-board {
  border: 1px solid var(--border, #e2e8f0);
  border-radius: 0.75rem;
  background: #fff;
  padding: 1rem 1.1rem;
  box-shadow: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.board-item:hover,
.forum-board:hover {
  border-color: rgba(0, 82, 217, 0.28);
  box-shadow: 0 12px 28px -20px rgba(6, 16, 31, 0.3);
}
.thread-list {
  background: #fff;
  border: 1px solid var(--border, #e2e8f0);
  border-radius: 0.75rem;
  padding: 0.35rem 1rem;
}
.thread-item {
  padding: 0.9rem 0.15rem;
  border-bottom: 1px solid #f1f5f9;
}
.thread-item:last-child { border-bottom: none; }
.thread-title a {
  color: var(--ink-950, #06101f);
  font-weight: 650;
}
.btn.btn-primary {
  border-radius: 0.55rem;
  font-weight: 650;
}