:root {
    --color-class: #3b82f6;
    --color-class-light: #eff6ff;
    --color-class-dark: #1d4ed8;
    --color-grade: #f59e0b;
    --color-grade-light: #fffbeb;
    --color-grade-dark: #b45309;
    --color-school: #10b981;
    --color-school-light: #ecfdf5;
    --color-school-dark: #047857;
    --color-toddler: #ec4899;
    --color-toddler-light: #fdf2f8;
    --color-toddler-dark: #be185d;
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-secondary: #64748b;
    --border: #e2e8f0;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
    --shadow-lg: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
}

* { box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    margin: 0;
    min-height: 100vh;
    background-image: 
        linear-gradient(rgba(148,163,184,.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148,163,184,.03) 1px, transparent 1px);
    background-size: 20px 20px;
}

/* 导航栏 */
.navbar-custom {
    background: rgba(255,255,255,.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 0 16px;
    position: sticky;
    top: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    height: 56px;
    gap: 0;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 17px;
    color: var(--text);
    white-space: nowrap;
    margin-right: 24px;
}
.nav-brand .icon { font-size: 22px; }

.nav-tabs-custom {
    display: flex;
    gap: 4px;
    flex: 1;
    overflow-x: auto;
}
.nav-tab {
    padding: 8px 16px;
    border-radius: 8px;
    border: none;
    background: transparent;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    white-space: nowrap;
    transition: all .2s;
    position: relative;
}
.nav-tab:hover { background: var(--bg); color: var(--text); }
.nav-tab.active { color: #fff; font-weight: 600; }
.nav-tab.tab-class.active { background: var(--color-class); }
.nav-tab.tab-grade.active { background: var(--color-grade); }
.nav-tab.tab-school.active { background: var(--color-school); }
.nav-tab.tab-toddler.active { background: var(--color-toddler); }
.nav-tab.tab-toddler { display: none; } /* 默认隐藏，园内模式显示 */

.nav-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
}
.nav-mode {
    display: flex;
    gap: 2px;
    background: var(--bg);
    border-radius: 10px;
    padding: 3px;
    margin-right: 12px;
}
.mode-btn {
    padding: 5px 14px;
    border-radius: 8px;
    border: none;
    background: transparent;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all .2s;
    white-space: nowrap;
}
.mode-btn.active {
    background: #fff;
    color: var(--text);
    font-weight: 600;
    box-shadow: 0 1px 2px rgba(0,0,0,.06);
}
.nav-btn {
    width: 36px; height: 36px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 18px;
    color: var(--text-secondary);
    transition: all .2s;
}
.nav-btn:hover { background: var(--bg); color: var(--text); }

/* 主内容 */
.main-content {
    max-width: 960px;
    margin: 0 auto;
    padding: 20px 16px 60px;
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* 卡片 */
.card-custom {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: var(--shadow);
}
.card-custom:hover { box-shadow: var(--shadow-lg); }

.card-header-custom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}
.card-title {
    font-size: 15px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* 表单 */
.form-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
}
/* 标签后面的辅助说明，例：教研员反馈「选填 · …」 */
.label-hint {
    font-weight: 400;
    font-size: 12px;
    color: var(--text-secondary);
    opacity: .75;
    margin-left: 6px;
}
textarea.form-control, input.form-control {
    font-size: 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 12px;
    transition: all .2s;
    background: #fafbfc;
}
textarea.form-control:focus, input.form-control:focus {
    border-color: var(--color-class);
    box-shadow: 0 0 0 3px rgba(59,130,246,.1);
    background: #fff;
}
textarea.form-control { resize: vertical; min-height: 100px; }

/* 按钮 */
.btn-custom {
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    padding: 8px 18px;
    transition: all .2s;
    border: none;
}
.btn-primary-class { background: var(--color-class); color: #fff; }
.btn-primary-class:hover { background: var(--color-class-dark); }
.btn-primary-grade { background: var(--color-grade); color: #fff; }
.btn-primary-grade:hover { background: var(--color-grade-dark); }
.btn-primary-school { background: var(--color-school); color: #fff; }
.btn-primary-school:hover { background: var(--color-school-dark); }
.btn-primary-toddler { background: var(--color-toddler); color: #fff; }
.btn-primary-toddler:hover { background: var(--color-toddler-dark); }

.btn-outline-custom {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
}
.btn-outline-custom:hover { background: var(--bg); }

.btn-sm-custom {
    padding: 4px 12px;
    font-size: 12px;
    border-radius: 6px;
}

/* 状态标签 */
.badge-status {
    font-size: 11px;
    padding: 3px 8px;
    border-radius: 10px;
    font-weight: 600;
}
.badge-status.empty { background: #f1f5f9; color: #94a3b8; }
.badge-status.generated { background: #dcfce7; color: #166534; }

/* 加载器 */
.spinner-sm {
    width: 16px; height: 16px;
    border: 2px solid rgba(255,255,255,.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin .6s linear infinite;
    display: none;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* 好课率面板 */
.good-rate-panel {
    background: linear-gradient(135deg, #ecfdf5, #d1fae5);
    border-radius: var(--radius);
    padding: 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 12px;
    margin-bottom: 16px;
}
.stat-item {
    text-align: center;
    padding: 12px;
    background: rgba(255,255,255,.7);
    border-radius: 10px;
}
.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-school-dark);
}
.stat-label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* 响应式 */
@media (max-width: 768px) {
    .navbar-custom { flex-wrap: wrap; height: auto; padding: 8px; }
    .nav-brand { margin-right: 8px; font-size: 15px; }
    .nav-tab { padding: 6px 10px; font-size: 13px; }
    .card-custom { padding: 14px; }
    .good-rate-panel { grid-template-columns: repeat(2, 1fr); }
}

/* 预览模态 */
#previewBody {
    font-family: "楷体", KaiTi, serif;
    font-size: 12pt;
    line-height: 1.9;
    padding: 20px;
}
#previewBody h1 { text-align: center; font-family: "黑体", SimHei, sans-serif; font-size: 15pt; }
#previewBody h2 { font-family: "黑体", SimHei, sans-serif; font-size: 12pt; font-weight: bold; }
#previewBody h3 { font-family: "黑体", SimHei, sans-serif; font-size: 12pt; font-weight: bold; }
#previewBody p { text-indent: 2em; text-align: justify; }
#previewBody p.no-indent { text-indent: 0; }
#previewBody p.right { text-align: right; text-indent: 0; }

/* 领域卡片 */
.domain-card {
    border-left: 3px solid var(--color-class);
    margin-bottom: 12px;
    transition: border-color .3s;
}
.domain-card.done { border-left-color: var(--color-school); }

/* 组员管理 */
.member-row {
    display: flex;
    gap: 8px;
    align-items: flex-start;
    margin-bottom: 12px;
}
.member-row .member-input { flex: 1; }
.member-row .btn-remove-member {
    margin-top: 2px;
    width: 32px; height: 32px;
    border-radius: 6px;
    border: 1px solid #fecaca;
    background: #fef2f2;
    color: #ef4444;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 年级组 Word 导入 */
.word-import-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}
.word-import-count {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
}
.word-import-empty {
    min-height: 112px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 13px;
    border: 1px dashed var(--border);
    border-radius: 8px;
    background: #fafbfc;
}
.word-import-empty i { font-size: 28px; color: var(--word-import-color, var(--color-grade)); }
.word-document-row {
    display: grid;
    grid-template-columns: minmax(150px, 200px) minmax(0, 1fr) 32px;
    gap: 12px;
    align-items: start;
    padding: 14px 0;
    margin: 0;
    border-bottom: 1px solid var(--border);
}
.word-document-row:last-child { border-bottom: none; padding-bottom: 0; }
.word-document-row:first-child { padding-top: 0; }
.word-document-meta { min-width: 0; }
.word-source-file {
    display: block;
    margin-top: 6px;
    overflow: hidden;
    color: var(--text-secondary);
    font-size: 11px;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.word-document-row textarea { min-height: 150px; }

@media (max-width: 768px) {
    #panel-grade-internal .card-header-custom,
    #panel-school-internal .card-header-custom { flex-wrap: wrap; gap: 12px; }
    .word-import-actions { width: 100%; justify-content: space-between; }
    .word-document-row { grid-template-columns: minmax(0, 1fr) 32px; }
    .word-document-row textarea { grid-column: 1 / -1; grid-row: 2; }
}

.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 9999;
}

/* ==================== AI 生成进度条 ====================
   长报告（园所意见、年级组意见）动辄一两分钟，没有进度提示
   使用者会以为页面卡死，所以给一条常驻的悬浮提示 + 取消按钮。 */
.ai-progress {
    position: fixed;
    top: 76px;
    left: 50%;
    transform: translateX(-50%);
    display: none;
    align-items: center;
    gap: 10px;
    padding: 8px 10px 8px 14px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 999px;
    box-shadow: var(--shadow-lg);
    font-size: 13px;
    color: var(--text);
    z-index: 1040;
}

.ai-progress-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-class);
    animation: ai-progress-pulse 1.2s ease-in-out infinite;
}

@keyframes ai-progress-pulse {
    0%, 100% { opacity: .25; transform: scale(.85); }
    50%      { opacity: 1;   transform: scale(1.15); }
}

@media (prefers-reduced-motion: reduce) {
    .ai-progress-dot { animation: none; }
}

.ai-progress-text {
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

.ai-progress-cancel {
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-secondary);
    border-radius: 999px;
    padding: 3px 12px;
    font-size: 12px;
    cursor: pointer;
    transition: all .15s;
}

.ai-progress-cancel:hover {
    background: var(--bg);
    color: var(--text);
}

@media (max-width: 768px) {
    .ai-progress { top: auto; bottom: 16px; }
}

/* ==================== 授权遮罩 ==================== */
body.lic-locked { overflow: hidden; }

.lic-overlay {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: rgba(15, 23, 42, .55);
    -webkit-backdrop-filter: blur(3px);
    backdrop-filter: blur(3px);
}

.lic-card {
    width: 100%;
    max-width: 380px;
    padding: 26px 24px 20px;
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: 0 24px 60px rgba(0, 0, 0, .25);
    text-align: center;
}

.lic-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
}

.lic-desc {
    font-size: 13px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 18px;
}

.lic-input {
    width: 100%;
    padding: 10px 12px;
    font-size: 15px;
    letter-spacing: .08em;
    text-align: center;
    text-transform: uppercase;
    color: var(--text);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    outline: none;
    transition: border-color .15s, box-shadow .15s;
}

.lic-input:focus {
    border-color: var(--color-school);
    box-shadow: 0 0 0 3px var(--color-school-light);
}

.lic-error {
    display: none;
    margin: 8px 2px 0;
    font-size: 12px;
    line-height: 1.6;
    text-align: left;
    color: #dc2626;
}

.lic-btn {
    width: 100%;
    margin-top: 14px;
    padding: 10px 0;
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    background: var(--color-school);
    border: 0;
    border-radius: 999px;
    cursor: pointer;
    transition: filter .15s;
}

.lic-btn:hover:not(:disabled) { filter: brightness(1.06); }
.lic-btn:disabled { opacity: .6; cursor: default; }

.lic-foot {
    margin-top: 16px;
    font-size: 11px;
    color: var(--text-secondary);
    opacity: .7;
}

.lic-foot code {
    font-size: 11px;
    padding: 1px 5px;
    background: var(--bg);
    border-radius: 4px;
}