/* ============================================================
   CJRH 智能助手 — 多技能统一对话 UI（v3.0 现代风格）
   版本 3.1 — SPA 重构版：固定侧栏 + 视图路由
   ============================================================ */

/* -------------------- 主题变量 -------------------- */
:root {
    /* New index3.0 variables */
    --bg-primary: #ffffff;
    --bg-secondary: #f7f7f8;
    --bg-tertiary: #f0f0f2;
    --bg-hover: #ececf1;
    --text-primary: #0d0d0d;
    --text-secondary: #595959;
    --text-tertiary: #8e8e8e;
    --border-color: #e5e5e7;
    --accent: #1a56db;
    --accent-hover: #1548b8;
    --accent-light: #eef2ff;
    --danger: #C0392B;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
    --radius-2xl: 28px;
    --sidebar-w: 260px;

    /* Legacy aliases (for eval.css and backward compat) */
    --bg: var(--bg-primary);
    --panel: var(--bg-secondary);
    --line: var(--border-color);
    --text: var(--text-primary);
    --muted: var(--text-secondary);
    --bubble: var(--bg-tertiary);
    --hover: var(--bg-hover);
    --hover-dark: #d5d5d7;
    --accent-text: #ffffff;
    --code-bg: var(--bg-secondary);
    --link: var(--accent);
    --input-bg: var(--bg-primary);
    --input-placeholder: var(--text-tertiary);
    --input-border: var(--border-color);
    --btn-logout-border: var(--border-color);
    --btn-logout-text: var(--text-secondary);
    --radius-lg: 16px;
    --radius-md: 12px;
    --shadow: var(--shadow-md);
}

[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #202020;
    --bg-tertiary: #2a2a2a;
    --bg-hover: #333333;
    --text-primary: #ffffff;
    --text-secondary: #b4b4b4;
    --text-tertiary: #707070;
    --border-color: #3a3a3a;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-light: #1e2a45;
    --danger: #E74C3C;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);

    --hover-dark: #454545;
    --bg: var(--bg-primary);
    --panel: var(--bg-secondary);
    --line: var(--border-color);
    --text: var(--text-primary);
    --muted: var(--text-secondary);
    --bubble: var(--bg-tertiary);
    --hover: var(--bg-hover);
    --accent-text: #ffffff;
    --code-bg: var(--bg-secondary);
    --link: var(--accent);
    --input-bg: var(--bg-primary);
    --input-placeholder: var(--text-tertiary);
    --input-border: var(--border-color);
    --btn-logout-border: var(--border-color);
    --btn-logout-text: var(--text-secondary);
    --radius-lg: 16px;
    --radius-md: 12px;
    --shadow: var(--shadow-md);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--text-primary);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    font-size: 15px;
}

.hidden { display: none !important; }

button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea { font-family: inherit; font-size: 15px; color: var(--text-primary); outline: none; }
a { color: inherit; text-decoration: none; }

#app { display: flex; height: 100vh; overflow: hidden; background: var(--bg-primary); }

/* 主题切换平滑过渡 */
#app, .sidebar, .main, .content, .welcome, .chatview, .composer, .messages,
.charts-view, .charts-slides, .charts-table, .charts-table-toggle,
.charts-stat-value, .charts-stat, .charts-tab, .charts-tab-indicator,
.ask-box, .composer-bar, .card, .modal-card,
.side-top, .topbar, .history-section, .history-item, .menu-item, .menu-group-header,
.btn-new, .field input, .field select,
.msg-avatar, .msg-bubble, .msg-content code, .input-icon {
    transition: background .25s ease, border-color .2s ease, color .2s ease;
}

/* ---------------- 左侧栏 ---------------- */
.sidebar {
    width: var(--sidebar-w);
    flex-shrink: 0;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 0;
    overflow: hidden;
    transition: width .25s ease, background .25s ease;
}

.side-top {
    display: flex; align-items: center;
    padding: 14px 16px 12px;
    border-bottom: 1px solid var(--border-color);
}

.side-top .sidebar-header {
    display: flex; align-items: center; gap: 10px; flex: 1;
}

.sidebar-logo {
    width: 30px; height: 30px; background: var(--accent); border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-weight: 700; font-size: 14px; flex-shrink: 0;
}
.logo-img { height: 30px; width: auto; display: block; }
.sidebar-header .logo-img { height: 30px; width: auto; display: block; }

.sidebar-logo-text {
    font-size: 16px; font-weight: 700; color: var(--text-primary);
    white-space: nowrap; letter-spacing: -0.02em;
}

.sidebar-toggle {
    display: flex; align-items: center; justify-content: center;
    width: 28px; height: 28px; border-radius: 8px; flex-shrink: 0;
    color: var(--text-tertiary); transition: all .15s;
    margin-left: auto;
}
.sidebar-toggle:hover { background: var(--bg-hover); color: var(--text-primary); }
.sidebar-toggle svg { width: 16px; height: 16px; display: block; }

/* 主题切换按钮（侧栏底部使用） */
.theme-toggle {
    width: 32px; height: 32px; border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    font-size: 16px; transition: all .15s;
    flex-shrink: 0; color: var(--text-tertiary);
}
.theme-toggle:hover { background: var(--bg-hover); color: var(--text-primary); }
.theme-toggle svg { display: block; }
/* 在侧栏底部按钮组中使用时，覆盖为完整宽度左对齐 */
.sidebar-action.theme-toggle {
    width: 100%;
    justify-content: flex-start;
    height: auto;
    font-size: 13px;
}

.btn-new {
    display: flex; align-items: center; gap: 8px;
    width: calc(100% - 24px);
    margin: 12px 12px 8px;
    padding: 10px 14px;
    border-radius: 10px;
    background: var(--accent);
    color: #fff;
    font-size: 13.5px; font-weight: 500;
    transition: opacity .15s;
}
.btn-new:hover { opacity: .85; }
.btn-new svg { flex-shrink: 0; opacity: .9; }

/* ---------------- 菜单树 ---------------- */
.menu-tree {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 4px 0;
}

.menu-group {
    border-bottom: 1px solid var(--border-color);
    padding: 4px 0;
}

.menu-group-header {
    display: flex; align-items: center; gap: 8px;
    width: 100%; padding: 8px 12px;
    border-radius: 0; font-size: 12px; font-weight: 600;
    text-align: left; cursor: pointer;
    transition: background .15s;
    letter-spacing: 0.03em;
    color: var(--text-secondary);
    text-transform: uppercase;
}
.menu-group-header:hover { background: var(--bg-hover); }
.menu-group-icon {
    width: 24px; height: 24px; border-radius: 6px;
    display: flex; align-items: center; justify-content: center;
    font-size: 14px; flex-shrink: 0;
}
.menu-group-label { flex: 1; }

.menu-group-arrow {
    color: var(--text-tertiary); flex-shrink: 0; display: flex;
    transition: transform .2s; opacity: .5;
}
.menu-group-arrow svg { display: block; }
.menu-group.collapsed .menu-group-arrow { transform: rotate(-90deg); }

.menu-group-desc {
    display: none;
}

.menu-children {
    overflow: hidden;
    max-height: 500px;
    transition: max-height .2s ease, opacity .15s ease;
    opacity: 1;
}
.menu-group.collapsed .menu-children { max-height: 0 !important; opacity: 0; }

.menu-item {
    display: flex; align-items: center; gap: 10px;
    width: 100%; padding: 8px 12px 8px 44px;
    border-radius: 0; font-size: 13.5px;
    text-align: left; cursor: pointer;
    transition: all .15s;
    color: var(--text-secondary);
}
.menu-item:hover { background: var(--bg-hover); color: var(--text-primary); }
.menu-item.active { color: var(--text-primary); font-weight: 500; background: var(--bg-hover); }
.menu-item.placeholder { opacity: .4; cursor: default; }
.menu-item.placeholder:hover { background: transparent; }

.menu-item-icon { flex-shrink: 0; display: flex; }
.menu-item-icon-bg {
    width: 22px; height: 22px;
    display: flex; align-items: center; justify-content: center;
    font-size: 14px; transition: background .15s;
}
.menu-item-label { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* 顶级菜单项（与 group-header 左对齐） */
.menu-item-top { padding-left: 12px; }
.sidebar.collapsed .menu-item-top { padding-left: 20px; }

/* ---------------- SVG 图标统一样式 ---------------- */
.menu-group-icon svg,
.menu-item-icon-bg svg {
    width: 16px; height: 16px; display: block;
}

/* ---------------- 侧栏折叠状态 ---------------- */
.sidebar.collapsed {
    width: 60px;
}
.sidebar.collapsed .sidebar-logo-text,
.sidebar.collapsed .sidebar-label,
.sidebar.collapsed .history-item-text,
.sidebar.collapsed .history-title,
.sidebar.collapsed .menu-group-label,
.sidebar.collapsed .menu-group-arrow,
.sidebar.collapsed .menu-group-desc,
.sidebar.collapsed .menu-children,
.sidebar.collapsed .menu-item-label,
.sidebar.collapsed .btn-new span,
.sidebar.collapsed .sidebar-action span,
.sidebar.collapsed .user-chip span,
.sidebar.collapsed .btn-login-side span,
.sidebar.collapsed .sidebar-footer-text { display: none; }
.sidebar.collapsed .side-top { padding: 14px 10px 12px; }
.sidebar.collapsed .btn-new {
    justify-content: center;
    padding: 8px;
    margin: 12px 8px 8px;
    width: auto;
}
.sidebar.collapsed .menu-group-header { justify-content: center; padding: 10px 8px; }
.sidebar.collapsed .menu-item { padding: 10px 8px 10px 20px; justify-content: flex-start; }
.sidebar.collapsed .user-chip { justify-content: center; }
.sidebar.collapsed .sidebar-footer { flex-direction: column; justify-content: center; padding: 8px; gap: 4px; }

/* ---------------- 侧栏底部用户区 ---------------- */
.side-bottom {
    border-top: 1px solid var(--border-color);
    padding: 10px 12px 12px;
    flex-shrink: 0;
}

.user-chip {
    display: flex; align-items: center; gap: 10px;
    padding: 6px 8px; border-radius: 8px; width: 100%;
    font-size: 14px; text-align: left;
    transition: background .15s;
}
.user-chip:hover { background: var(--bg-hover); }

.avatar {
    width: 30px; height: 30px; border-radius: 50%;
    background: var(--accent); color: var(--accent-text);
    display: flex; align-items: center; justify-content: center;
    font-size: 13px; font-weight: 600; flex-shrink: 0; overflow: hidden;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; }

.btn-login-side {
    display: flex; align-items: center; justify-content: center; gap: 6px;
    width: 100%; padding: 8px 0;
    border: 1.5px solid var(--input-border); border-radius: 10px;
    font-size: 14px; font-weight: 500; color: var(--text-primary);
    background: var(--bg-primary);
    transition: all .15s;
}
.btn-login-side:hover { background: var(--bg-hover); border-color: var(--text-primary); }

/* ---------------- 侧栏底部操作栏 ---------------- */
.sidebar-footer {
    display: flex; flex-direction: column; align-items: stretch;
    padding: 8px 12px 12px;
    gap: 2px;
    border-top: 1px solid var(--border-color);
    margin-top: 0;
}

.sidebar-action {
    display: flex; align-items: center; gap: 8px;
    padding: 6px 8px;
    border-radius: 8px;
    font-size: 13px; color: var(--text-tertiary);
    transition: all .15s;
    background: transparent; border: none; cursor: pointer;
    width: 100%;
}
.sidebar-action span { white-space: nowrap; }
.sidebar-action:hover { background: var(--bg-hover); color: var(--text-primary); }
.sidebar-action svg { flex-shrink: 0; width: 16px; height: 16px; }

/* ---------------- 主区域 ---------------- */
.main { flex: 1; display: flex; flex-direction: column; min-width: 0; background: var(--bg-primary); }

.topbar {
    display: flex; justify-content: flex-end; align-items: center;
    padding: 12px 28px;
    min-height: 56px;
    border-bottom: 1px solid var(--border-color);
}

.topbar-left {
    display: flex; align-items: center; gap: 12px; margin-right: auto;
}
.topbar-title {
    font-size: 16px; font-weight: 600; color: var(--text-primary);
}

.topbar-right {
    display: flex; align-items: center; gap: 10px;
    flex-shrink: 0; white-space: nowrap;
}

.topbar-user {
    display: flex; align-items: center; gap: 10px;
    flex-shrink: 0; white-space: nowrap;
    position: relative;
}

.btn-login-top {
    padding: 7px 18px;
    border: 1.5px solid var(--input-border); border-radius: 10px;
    background: var(--bg-primary); font-size: 14px; font-weight: 500;
    color: var(--text-primary);
    transition: all .15s;
}
.btn-login-top:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

.btn-logout {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 7px 16px;
    border: 1.5px solid var(--btn-logout-border); border-radius: 10px;
    background: var(--bg-primary); font-size: 13.5px; color: var(--btn-logout-text);
    white-space: nowrap; flex-shrink: 0;
    transition: all .15s;
}
.btn-logout svg { flex-shrink: 0; }
.btn-logout:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

.top-user { position: relative; }
.top-user .user-chip { padding: 4px 6px; }

.user-menu {
    position: absolute; right: 0; top: calc(100% + 6px);
    background: var(--bg-primary); border: 1px solid var(--border-color);
    border-radius: 12px; box-shadow: var(--shadow-md);
    min-width: 150px; padding: 6px; z-index: 30;
}
.user-menu a, .user-menu button {
    display: block; width: 100%; padding: 9px 12px;
    border-radius: 8px; font-size: 14px; text-align: left;
}
.user-menu a:hover, .user-menu button:hover { background: var(--bg-hover); }

.content { flex: 1; position: relative; overflow: hidden; display: flex; background: var(--bg-primary); }

/* ---------------- 欢迎页 ---------------- */
.welcome {
    margin: auto; width: 100%;
    max-width: 720px;
    padding: 0 24px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100%;
    background: var(--bg-primary);
}

.welcome-logo { height: 72px; width: auto; max-width: 90%; }

.welcome-title {
    margin-top: 16px; font-size: 28px; font-weight: 700;
    letter-spacing: -0.5px;
}

.welcome-sub { color: var(--muted); font-size: 15px; margin: 10px 0 30px; }

/* 输入框（欢迎页与对话页共用） */
.ask-box {
    position: relative;
    background: var(--bg-primary);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-sm);
    padding: 0;
    transition: border-color .2s ease, box-shadow .2s ease;
    width: 100%;
    max-width: 760px;
}
.ask-box:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-light);
}
[data-theme="dark"] .ask-box:focus-within {
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.15);
}

.ask-box .composer-textarea-wrap {
    padding: 16px 20px 8px;
}

.ask-box textarea {
    width: 100%; border: none; resize: none;
    max-height: 160px; line-height: 1.6;
    background: transparent;
    font-size: 16px;
}
.ask-box textarea::placeholder { color: var(--input-placeholder); }

.btn-send {
    width: 36px; height: 36px; border-radius: 50%;
    background: var(--text-primary); color: var(--bg-primary);
    display: flex; align-items: center; justify-content: center;
    transition: opacity .15s, transform .15s;
    border: none;
    flex-shrink: 0;
}
.btn-send:disabled { opacity: .25; cursor: not-allowed; }
.btn-send:not(:disabled):hover { opacity: .85; }

.btn-stop {
    width: 36px; height: 36px; border-radius: 50%;
    background: var(--bg-tertiary); color: var(--text-primary);
    border: 1px solid var(--border-color);
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}
.btn-stop:hover { background: var(--bg-hover); }

/* 预置提问卡片 */
.cards {
    display: flex; flex-wrap: wrap; justify-content: center;
    gap: 10px; margin-top: 28px; max-width: 760px; margin-left: auto; margin-right: auto;
}

.card {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 10px 20px;
    background: var(--bg-primary); border: 1px solid var(--border-color);
    border-radius: 20px; font-size: 13.5px; color: var(--text-primary);
    cursor: pointer; user-select: none;
    transition: all .15s;
}
.card:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-light);
    transform: translateY(-1px);
}

.welcome-tip, .composer-tip {
    margin-top: 26px; text-align: center;
    font-size: 12px; color: var(--text-tertiary);
}

/* ---------------- 对话页 ---------------- */
.chatview { flex: 1; display: flex; flex-direction: column; min-height: 0; background: var(--bg-primary); }

.messages {
    flex: 1; overflow-y: auto;
    padding: 24px 24px 16px;
    background: var(--bg-primary);
}

.msg-list { max-width: 800px; margin: 0 auto; }

.msg-row { display: flex; gap: 12px; margin: 24px 0; }

.msg-row.user { justify-content: flex-end; }

.msg-avatar {
    width: 36px; height: 36px; border-radius: 8px; flex-shrink: 0;
    background: var(--accent); color: #fff;
    font-size: 13px; font-weight: 700;
    display: flex; align-items: center; justify-content: center;
    margin-top: 2px;
}

.msg-row.user .msg-avatar {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.msg-bubble {
    max-width: 78%;
    padding: 11px 16px;
    background: var(--bubble);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    line-height: 1.65;
    white-space: pre-wrap;
    word-break: break-word;
}

.msg-row.user .msg-bubble {
    background: var(--accent-light);
    border-color: var(--accent-light);
}

.msg-content {
    max-width: calc(100% - 48px);
    font-size: 15px;
    line-height: 1.75;
    word-break: break-word;
    text-align: left;
}

/* 流式输出光标 */
.streaming .msg-body::after {
    content: "";
    display: inline-block;
    width: 8px; height: 16px;
    margin-left: 3px; vertical-align: -2px;
    background: var(--text-primary);
    animation: blink 1s steps(2, start) infinite;
}
@keyframes blink { to { visibility: hidden; } }

.msg-error { color: var(--danger); font-size: 13px; margin-top: 6px; }

/* Markdown 排版 */
.msg-content p { margin: 0 0 10px; }
.msg-content p:last-child { margin-bottom: 0; }
.msg-content h1, .msg-content h2, .msg-content h3,
.msg-content h4, .msg-content h5, .msg-content h6 { margin: 16px 0 10px; line-height: 1.4; }
.msg-content h1 { font-size: 22px; } .msg-content h2 { font-size: 19px; } .msg-content h3 { font-size: 17px; }
.msg-content ul, .msg-content ol { margin: 0 0 10px; padding-left: 22px; }
.msg-content li { margin: 4px 0; }
.msg-content code {
    background: var(--bubble); border-radius: 5px;
    padding: 2px 6px; font-size: 13.5px;
    font-family: Consolas, Monaco, "Courier New", monospace;
}
.msg-content pre {
    background: var(--code-bg); border: 1px solid var(--border-color);
    border-radius: 12px; padding: 14px 16px;
    overflow-x: auto; margin: 0 0 10px;
}
.msg-content pre code { background: none; padding: 0; font-size: 13.5px; line-height: 1.6; }
.msg-content table { border-collapse: collapse; margin: 0 0 10px; display: block; overflow-x: auto; }
.msg-content th, .msg-content td { border: 1px solid var(--border-color); padding: 7px 12px; font-size: 14px; }
.msg-content th { background: var(--bubble); }
.msg-content blockquote {
    border-left: 4px solid var(--accent); padding: 10px 14px;
    margin: 0 0 14px; background: var(--bubble);
    border-radius: 0 8px 8px 0;
}
.msg-content blockquote p { margin: 2px 0; }
.msg-content a { color: var(--link); text-decoration: underline; }
.msg-content hr { border: none; border-top: 1px solid var(--border-color); margin: 14px 0; }

/* ---------------- 底部输入区（Composer） ---------------- */
.composer {
    padding: 0 24px 12px;
    background: var(--bg-primary);
}

.composer .ask-box { max-width: 800px; margin: 0 auto; }

.composer-tip { margin-top: 8px; margin-bottom: 10px; }

/* Composer 输入条 */
.composer-bar {
    background: var(--bg-primary);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-sm);
    max-width: 800px; margin: 0 auto;
    transition: border-color .2s ease, box-shadow .2s ease;
}
.composer-bar:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-light);
}
[data-theme="dark"] .composer-bar:focus-within {
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.15);
}

.composer-textarea-wrap {
    padding: 14px 20px 6px;
}

.composer-bar textarea {
    width: 100%; border: none; resize: none;
    max-height: 160px; line-height: 1.6;
    background: transparent;
    font-size: 16px;
}
.composer-bar textarea::placeholder { color: var(--input-placeholder); }

/* 工具栏（composer 底部行） */
.composer-toolbar {
    display: flex; align-items: center; justify-content: space-between;
    padding: 6px 12px 10px;
}

.toolbar-left {
    display: flex; align-items: center; gap: 6px;
}

.toolbar-right {
    display: flex; align-items: center; gap: 8px;
}

.toolbar-hint {
    font-size: 12px; color: var(--text-tertiary);
    padding-left: 4px;
}

.toolbar-plus {
    width: 32px; height: 32px; border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    color: var(--text-tertiary);
    transition: all .15s;
    background: transparent; border: none; cursor: pointer;
}
.toolbar-plus:hover { background: var(--bg-hover); color: var(--text-primary); }
.toolbar-plus svg { width: 18px; height: 18px; }

/* 文件上传按钮兼容 */
.btn-attach {
    width: 32px; height: 32px; border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    color: var(--text-tertiary);
    transition: all .15s;
    background: none; border: none;
}
.btn-attach:hover { background: var(--bg-hover); color: var(--text-primary); }
.btn-attach[style*="display: none"] { display: none !important; }

.file-preview {
    display: flex; flex-wrap: wrap; gap: 6px;
    padding: 8px 14px 0;
    align-items: center;
}
.file-preview.hidden { display: none; }

.file-chip {
    display: inline-flex; align-items: center; gap: 4px;
    background: var(--bg-hover); border-radius: 999px;
    padding: 4px 8px 4px 10px;
    font-size: 12px; color: var(--text-primary);
    max-width: 180px;
}
.file-chip-name {
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.file-chip-del {
    width: 18px; height: 18px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 13px; line-height: 1;
    color: var(--muted); flex-shrink: 0;
    transition: background .15s, color .15s;
    background: none; border: none; cursor: pointer;
}
.file-chip-del:hover { background: var(--hover-dark); color: var(--danger); }

/* ---------------- 登录 & 注册弹窗 ---------------- */
.modal-mask {
    position: fixed; inset: 0; z-index: 100;
    background: rgba(0, 0, 0, 0.35);
    display: flex; align-items: center; justify-content: center;
    animation: maskIn .2s ease;
}
[data-theme="dark"] .modal-mask { background: rgba(0, 0, 0, 0.55); }
@keyframes maskIn { from { opacity: 0; } to { opacity: 1; } }

.modal-card {
    width: 420px; max-width: calc(100vw - 40px);
    max-height: calc(100vh - 40px); overflow-y: auto;
    background: var(--bg-primary); border-radius: 24px;
    padding: 0;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    animation: modalSlideUp .3s cubic-bezier(.22,1,.36,1);
}
@keyframes modalSlideUp {
    from { opacity: 0; transform: translateY(20px) scale(.96); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-head {
    display: flex; justify-content: space-between; align-items: center;
    padding: 28px 28px 0;
    font-size: 17px; font-weight: 700;
    letter-spacing: -0.3px;
}

.modal-close {
    color: var(--text-tertiary); padding: 6px; border-radius: 8px;
    transition: all .15s; margin-right: -4px;
}
.modal-close:hover { background: var(--bg-hover); color: var(--text-primary); }

.modal-body {
    padding: 24px 28px 28px;
}

.field { display: block; margin-bottom: 20px; font-size: 13px; }
.field > span {
    display: block; color: var(--text-secondary); margin-bottom: 6px;
    font-weight: 500; font-size: 13px; line-height: 1.5;
}

.field input, .field select {
    width: 100%; padding: 12px 16px;
    border: 1.5px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-primary);
    transition: all .2s ease;
    font-size: 14px;
    color: var(--text-primary);
    -webkit-appearance: none;
    appearance: none;
}
.field input:focus, .field select:focus {
    border-color: var(--accent);
    background: var(--bg-primary);
    box-shadow: 0 0 0 4px var(--accent-light);
    outline: none;
}
[data-theme="dark"] .field input, [data-theme="dark"] .field select {
    background: var(--bg-tertiary);
    border-color: var(--border-color);
    color: var(--text-primary);
}
[data-theme="dark"] .field input:focus, [data-theme="dark"] .field select:focus {
    background: var(--bg-tertiary);
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.15);
}
.field input::placeholder { color: var(--input-placeholder); }

/* select dropdown arrow */
.field select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238B8B84' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 36px;
    cursor: pointer;
}
.field select:disabled {
    background-color: var(--bg-secondary);
    cursor: not-allowed;
    opacity: .7;
}

.field .captcha-row { display: flex; gap: 10px; align-items: center; width: 100%; }
.field .captcha-row input { flex: 1 1 0; min-width: 0; border-radius: 12px; }
.field .captcha-row img {
    height: 44px; width: auto; border-radius: 10px; cursor: pointer;
    flex-shrink: 0; border: 1px solid var(--border-color); transition: opacity .15s;
}
.field .captcha-row img:hover { opacity: .8; }

.btn-sms {
    height: 44px; padding: 0 18px; white-space: nowrap; flex-shrink: 0;
    background: var(--accent); color: #fff;
    border: none; border-radius: 12px;
    font-size: 13px; font-weight: 600;
    cursor: pointer; transition: all .2s ease;
    letter-spacing: 0.3px;
    min-width: 96px;
}
.btn-sms:hover { opacity: .9; }
.btn-sms:disabled { opacity: .35; cursor: not-allowed; }

.login-error {
    color: var(--danger); font-size: 13px; min-height: 0;
    margin-bottom: 14px; line-height: 1.5;
    font-weight: 500;
}

.register-switch { text-align: center; font-size: 13.5px; color: var(--muted); margin-top: 18px; }
.register-switch a {
    color: var(--text-primary); font-weight: 600; text-decoration: none; cursor: pointer;
    border-bottom: 1.5px solid transparent; transition: border-color .15s;
}
.register-switch a:hover { border-color: var(--text-primary); }

.btn-primary {
    width: 100%; padding: 14px 0;
    background: var(--accent); color: #fff;
    border: none;
    border-radius: 14px; font-size: 15px; font-weight: 600;
    transition: all .2s ease;
    letter-spacing: 1px;
    cursor: pointer;
}
.btn-primary:hover { opacity: .9; transform: translateY(-1.5px); box-shadow: 0 4px 14px rgba(0,0,0,0.12); }
.btn-primary:active { transform: translateY(0); opacity: .8; }
.btn-primary:disabled { opacity: .4; cursor: not-allowed; transform: none; box-shadow: none; }

/* form divider */
.field-divider {
    border: none; border-top: 1px solid var(--border-color);
    margin: 22px 0 18px;
}

/* ---- 弹窗头部图标 ---- */
.modal-head-left {
    display: flex;
    align-items: center;
    gap: 10px;
}
.modal-head-left svg {
    flex-shrink: 0;
    opacity: .7;
}

/* ---- 输入框图标 ---- */
.input-wrap {
    position: relative;
    display: flex;
    align-items: center;
}
.input-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--muted);
    pointer-events: none;
    flex-shrink: 0;
    opacity: .55;
    transition: opacity .2s ease, color .2s ease;
    z-index: 1;
}
.input-wrap:focus-within .input-icon {
    opacity: 1;
    color: var(--text-primary);
}
.input-wrap input,
.input-wrap select {
    padding-left: 42px;
    width: 100%;
}

/* ---- 强化输入框焦点 ---- */
.field input, .field select {
    transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
}
.field input:focus, .field select:focus {
    border-color: var(--accent) !important;
    background: var(--bg-primary) !important;
    box-shadow: 0 0 0 4px var(--accent-light) !important;
    outline: none;
}

/* ---- 切换链接动画 ---- */
.register-switch a {
    position: relative;
    border-bottom: none;
}
.register-switch a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -1px;
    width: 0;
    height: 1.5px;
    background: var(--text-primary);
    transition: width .25s ease;
}
.register-switch a:hover::after {
    width: 100%;
}

/* ---- 弹窗卡片过渡微调 ---- */
.modal-card {
    transition: background .25s ease, border-color .2s ease, box-shadow .25s ease;
}

/* ---------------- 轻提示 ---------------- */
.toast {
    position: fixed; left: 50%; bottom: 40px; transform: translateX(-50%) translateY(20px);
    background: var(--text-primary); color: var(--bg-primary);
    padding: 12px 24px; border-radius: 12px; font-size: 14px;
    transition: transform .25s ease, opacity .2s ease;
    z-index: 200; pointer-events: none;
    opacity: 0;
}
.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* 滚动条 */
.messages::-webkit-scrollbar,
.menu-tree::-webkit-scrollbar,
.history-list::-webkit-scrollbar { width: 6px; }
.messages::-webkit-scrollbar-thumb,
.menu-tree::-webkit-scrollbar-thumb,
.history-list::-webkit-scrollbar-thumb {
    background: transparent; border-radius: 3px;
}
.messages:hover::-webkit-scrollbar-thumb,
.menu-tree:hover::-webkit-scrollbar-thumb,
.history-list:hover::-webkit-scrollbar-thumb {
    background: var(--border-color);
}

/* ---------------- 移动端适配 ---------------- */
@media (max-width: 768px) {
    .sidebar {
        position: fixed; left: 0; top: 0; bottom: 0; z-index: 90;
        transform: translateX(-100%);
        transition: transform .25s ease;
    }
    .sidebar.mobile-open {
        transform: translateX(0);
        box-shadow: var(--shadow-lg);
    }
    .topbar { padding: 12px 16px; }
    .messages { padding: 16px 14px 12px; }
    .composer { padding: 0 14px 12px; }
    .welcome { padding: 0 16px; }
}

.sidebar-overlay {
    position: fixed; inset: 0; z-index: 80;
    background: rgba(0,0,0,0.3);
    opacity: 0; pointer-events: none;
    transition: opacity .25s ease;
}
.sidebar-overlay.show {
    opacity: 1; pointer-events: auto;
}

@media (max-width: 480px) {
    .welcome { padding: 0 12px; }
    .welcome-sub { font-size: 13px; }
    .card { font-size: 12px; padding: 8px 14px; }
}

/* ==================== 产教融合指数图表视图 ==================== */
.charts-view {
    width: 100%; max-width: 880px; margin: 0 auto; padding: 4px 0 12px;
}

/* 头部 */
.charts-header { text-align: center; padding: 0 0 2px; }
.charts-header p {
    color: var(--muted); font-size: 13px; margin: 0;
    letter-spacing: 0.02em;
}

/* 统计摘要条 */
.charts-stats {
    display: flex; justify-content: center; align-items: center; gap: 0;
    padding: 16px 0 14px; flex-wrap: wrap;
}
.charts-stat {
    display: flex; align-items: baseline; gap: 4px;
    font-size: 13px; color: var(--muted);
    padding: 0 18px;
}
.charts-stat-value {
    font-size: 22px; font-weight: 700; color: #2A6B7C;
    line-height: 1; letter-spacing: -0.02em;
}
[data-theme="dark"] .charts-stat-value { color: #5EA6B8; }
.charts-stat-divider {
    width: 1px; height: 24px; background: var(--border-color); flex-shrink: 0;
}

/* 标签栏（下划线指示器） */
.charts-tabs {
    display: flex; position: relative; gap: 0;
    border-bottom: 1.5px solid var(--border-color); margin-bottom: 0;
}
.charts-tab {
    flex: 1; padding: 10px 12px 10px; font-size: 13px; font-weight: 500;
    color: var(--muted); cursor: pointer; transition: color .15s;
    background: none; border: none; position: relative; z-index: 1;
    white-space: nowrap; text-align: center;
}
.charts-tab:hover { color: var(--text-primary); }
.charts-tab.active { color: #2A6B7C; }
[data-theme="dark"] .charts-tab.active { color: #5EA6B8; }
.charts-tab-indicator {
    position: absolute; bottom: -1.5px; height: 2.5px;
    background: #2A6B7C; border-radius: 2px;
    transition: left .25s cubic-bezier(.22,1,.36,1), width .25s cubic-bezier(.22,1,.36,1);
    z-index: 2; pointer-events: none;
}
[data-theme="dark"] .charts-tab-indicator { background: #5EA6B8; }

/* 轮播幻灯片 */
.charts-slides {
    position: relative; overflow: hidden;
    background: var(--bg-primary); border-radius: 0 0 12px 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
    border: 1px solid var(--border-color); border-top: none;
}
.charts-slide { display: none; }
.charts-slide.active { display: block; }
.charts-chart { width: 100%; height: 480px; }

/* 数据表格折叠 */
.charts-table-toggle {
    margin-top: 10px; padding: 10px 14px; font-size: 13px; font-weight: 500;
    background: var(--bg-primary); border-radius: 10px;
    box-shadow: 0 1px 3px rgba(0,0,0,.06);
    border: 1px solid var(--border-color);
    cursor: pointer; text-align: center; color: var(--muted);
    transition: background .15s, border-color .15s; user-select: none;
    letter-spacing: 0.01em;
}
.charts-table-toggle:hover { background: var(--bg-hover); border-color: var(--accent); color: var(--text-primary); }
.charts-table {
    margin-top: 0; overflow-x: auto; transition: all .25s ease;
    max-height: 800px;
}
.charts-table.collapsed { max-height: 0; overflow: hidden; margin-top: 0; }
.charts-table table {
    width: 100%; border-collapse: collapse; font-size: 13px;
    background: var(--bg-primary); border-radius: 12px;
    overflow: hidden; box-shadow: 0 1px 3px rgba(0,0,0,.06);
    margin-top: 8px;
}
.charts-table thead { position: sticky; top: 0; z-index: 3; }
.charts-table th {
    background: var(--bg-hover); text-align: left; padding: 10px 12px;
    border-bottom: 1.5px solid var(--border-color); font-weight: 600;
    color: var(--text-primary);
}
.charts-table td {
    padding: 8px 12px; border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}
.charts-table tr.alt td { background: rgba(0,0,0,.02); }
[data-theme="dark"] .charts-table tr.alt td { background: rgba(255,255,255,.03); }
.charts-table tr:hover td { background: var(--bg-hover); }
.charts-score-bar {
    display: inline-block; height: 8px; border-radius: 4px;
    background: linear-gradient(90deg, #2A6B7C, #5EA6B8);
    margin-right: 8px; vertical-align: middle;
}
.score-base { color: #2A6B7C; font-weight: 600; }
.score-plus { color: #D4833D; font-weight: 600; }
.score-base-label, .score-plus-label { font-size: 11px; color: var(--muted); margin-right: 8px; white-space: nowrap; }
.charts-table th { white-space: nowrap; }

/* 移动端适配 */
@media (max-width: 768px) {
    .charts-chart { height: 380px; }
    .charts-tab { font-size: 12px; padding: 8px 8px; }
    .charts-stat { padding: 0 10px; }
    .charts-stat-value { font-size: 18px; }
}

@media (max-width: 480px) {
    .charts-chart { height: 320px; }
    .charts-stat { padding: 0 6px; font-size: 12px; }
    .charts-stat-value { font-size: 16px; }
}

/* 评价报告下载按钮 */
.msg-download-report {
    display: inline-block; padding: 10px 28px;
    background: #2A6B7C; color: #fff;
    text-decoration: none; border-radius: 6px;
    font-size: 15px; transition: background .2s;
    margin: 8px 0;
}
.msg-download-report:hover { background: #1F5665; }
[data-theme="dark"] .msg-download-report { background: #3D8B9E; }
[data-theme="dark"] .msg-download-report:hover { background: #4A9EB3; }

/* ---------------- 评价智能体欢迎区域 ---------------- */
.chatview { position: relative; }

.eval-welcome {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: calc(100% - 48px);
    max-width: 800px;
    padding: 24px 28px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    z-index: 2;
}

.eval-welcome-text {
    font-size: 14px;
    line-height: 1.75;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.eval-welcome-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-primary);
    font-weight: 500;
    margin-bottom: 16px;
}

.step-arrow {
    color: var(--text-tertiary);
    font-size: 12px;
}

.eval-welcome-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}

.link-sep {
    color: var(--border-color);
    font-size: 13px;
}

.eval-quick-link {
    color: var(--accent);
    font-size: 13px;
    cursor: pointer;
    text-decoration: none;
    border-bottom: 1px dashed var(--accent);
    padding: 2px 0;
    transition: opacity .15s;
}
.eval-quick-link:hover {
    opacity: .75;
}

/* ---------------- 操作建议链接 ---------------- */
.suggest-links {
    margin-top: 10px;
    padding-top: 8px;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.suggest-link {
    color: var(--text-tertiary);
    font-size: 12.5px;
    cursor: pointer;
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: color .15s;
}
.suggest-link:hover {
    color: var(--accent);
}