/* ============================================================
   小学工具套件 · 共享设计系统（作业本 / 手账风）
   前缀 ks-（Kids Suite），支持 [data-theme="dark"] 与 A4 打印
   ============================================================ */

:root {
    --ks-paper: #fffdf8;
    --ks-ink: #1f2937;
    --ks-sub: #6b7280;
    --ks-mute: #9ca3af;
    --ks-line: #e8e2d4;
    --ks-soft: #f8f5ec;
    --ks-accent: #4f46e5;
    --ks-accent-soft: #eef2ff;
    --ks-warm: #f59e0b;
    --ks-warm-soft: #fffbeb;
    --ks-green: #059669;
    --ks-green-soft: #ecfdf5;
    --ks-red: #dc2626;
    --ks-red-soft: #fef2f2;
    --ks-shadow: 0 12px 30px rgba(66, 58, 38, .08);
    --ks-radius: 18px;
}

[data-theme="dark"] {
    --ks-paper: #14161c;
    --ks-ink: #e8eaf0;
    --ks-sub: #a1a8b8;
    --ks-mute: #7b8397;
    --ks-line: #2a2f3a;
    --ks-soft: #1b1f28;
    --ks-accent: #818cf8;
    --ks-accent-soft: rgba(99, 102, 241, .14);
    --ks-warm: #fbbf24;
    --ks-warm-soft: rgba(245, 158, 11, .12);
    --ks-green: #34d399;
    --ks-green-soft: rgba(16, 185, 129, .12);
    --ks-red: #f87171;
    --ks-red-soft: rgba(239, 68, 68, .12);
    --ks-shadow: 0 12px 30px rgba(0, 0, 0, .3);
}

/* ---------- 容器 ---------- */
.ks-app {
    max-width: 1080px;
    margin: 0 auto;
    padding-bottom: 10px;
    color: var(--ks-ink);
}
.ks-app * { box-sizing: border-box; }

/* ---------- Hero ---------- */
.ks-hero {
    position: relative;
    display: flex;
    align-items: center;
    gap: 22px;
    background: var(--ks-paper);
    border: 1px solid var(--ks-line);
    border-radius: var(--ks-radius);
    padding: 24px 26px 24px 30px;
    margin-bottom: 16px;
    box-shadow: var(--ks-shadow);
    overflow: hidden;
}
.ks-hero::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 6px;
    background: linear-gradient(180deg, var(--ks-accent), var(--ks-warm));
}
.ks-hero::after {
    content: '';
    position: absolute;
    right: -30px; top: -40px;
    width: 170px; height: 170px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(245, 158, 11, .12) 0%, transparent 68%);
    pointer-events: none;
}
.ks-hero-main { flex: 1; min-width: 0; }
.ks-kicker {
    display: inline-block;
    font-size: 11.5px;
    font-weight: 800;
    letter-spacing: 1.5px;
    color: var(--ks-accent);
    background: var(--ks-accent-soft);
    border-radius: 999px;
    padding: 4px 11px;
    margin-bottom: 10px;
}
.ks-hero h1 {
    margin: 0 0 8px;
    font-size: 25px;
    font-weight: 900;
    line-height: 1.35;
    letter-spacing: -.2px;
}
.ks-hero h1 em {
    font-style: normal;
    color: var(--ks-warm);
}
.ks-hero p {
    margin: 0;
    font-size: 13.5px;
    line-height: 1.85;
    color: var(--ks-sub);
    max-width: 620px;
}
.ks-hero p b { color: var(--ks-ink); }
.ks-points {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin: 12px 0 0;
    padding: 0;
    list-style: none;
}
.ks-points li {
    font-size: 11.5px;
    font-weight: 700;
    color: var(--ks-sub);
    background: var(--ks-soft);
    border: 1px solid var(--ks-line);
    border-radius: 999px;
    padding: 4px 10px;
}
.ks-hero-side {
    flex: none;
    width: 190px;
    text-align: center;
    font-size: 58px;
    line-height: 1;
    filter: drop-shadow(0 8px 14px rgba(0, 0, 0, .1));
}
.ks-hero-side small {
    display: block;
    margin-top: 10px;
    font-size: 11px;
    font-weight: 800;
    color: var(--ks-mute);
    letter-spacing: 1px;
}

/* ---------- 两栏布局 ---------- */
.ks-grid {
    display: grid;
    grid-template-columns: 350px minmax(0, 1fr);
    gap: 16px;
    align-items: start;
}
.ks-grid-wide { grid-template-columns: minmax(0, 1fr); }
.ks-side { position: sticky; top: 14px; }

/* ---------- 面板 ---------- */
.ks-panel {
    background: var(--ks-paper);
    border: 1px solid var(--ks-line);
    border-radius: var(--ks-radius);
    padding: 18px;
    box-shadow: var(--ks-shadow);
}
.ks-panel + .ks-panel { margin-top: 14px; }
.ks-panel h2 {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0 0 14px;
    font-size: 15px;
    font-weight: 900;
}
.ks-panel h2 small {
    font-size: 11px;
    font-weight: 700;
    color: var(--ks-mute);
    margin-left: auto;
}
.ks-step {
    display: flex;
    gap: 12px;
    padding-bottom: 16px;
    margin-bottom: 16px;
    border-bottom: 1px dashed var(--ks-line);
}
.ks-step:last-child { border-bottom: 0; padding-bottom: 0; margin-bottom: 0; }
.ks-step-no {
    flex: none;
    width: 26px; height: 26px;
    border-radius: 9px;
    background: var(--ks-accent-soft);
    color: var(--ks-accent);
    font-size: 12px;
    font-weight: 900;
    display: flex;
    align-items: center;
    justify-content: center;
}
.ks-step-no.ai { background: var(--ks-warm-soft); color: var(--ks-warm); }
.ks-step-body { flex: 1; min-width: 0; }
.ks-step-body h3 {
    margin: 0 0 10px;
    font-size: 13.5px;
    font-weight: 900;
    display: flex;
    align-items: center;
    gap: 6px;
}
.ks-step-body h3 span {
    font-size: 11px;
    font-weight: 600;
    color: var(--ks-mute);
}

/* ---------- 表单 ---------- */
.ks-field { margin-bottom: 12px; }
.ks-field:last-child { margin-bottom: 0; }
.ks-label {
    display: block;
    font-size: 11.5px;
    font-weight: 800;
    color: var(--ks-sub);
    letter-spacing: .6px;
    margin-bottom: 7px;
}
.ks-input, .ks-select, .ks-textarea {
    width: 100%;
    font-family: inherit;
    font-size: 14px;
    color: var(--ks-ink);
    background: var(--ks-soft);
    border: 1.5px solid var(--ks-line);
    border-radius: 11px;
    padding: 10px 12px;
    outline: none;
    transition: border-color .15s, background .15s;
}
.ks-input:focus, .ks-select:focus, .ks-textarea:focus {
    border-color: var(--ks-accent);
    background: var(--ks-paper);
}
.ks-textarea { resize: vertical; min-height: 76px; line-height: 1.7; }
.ks-row { display: flex; gap: 8px; flex-wrap: wrap; }
.ks-row > * { flex: 1; min-width: 0; }
.ks-hint { font-size: 11.5px; line-height: 1.7; color: var(--ks-mute); margin: 6px 0 0; }

/* 分段控件 */
.ks-seg {
    display: flex;
    gap: 3px;
    background: var(--ks-soft);
    border: 1px solid var(--ks-line);
    border-radius: 11px;
    padding: 3px;
}
.ks-seg button {
    flex: 1;
    border: 0;
    background: transparent;
    color: var(--ks-sub);
    font-family: inherit;
    font-size: 12.5px;
    font-weight: 800;
    padding: 7px 4px;
    border-radius: 8px;
    cursor: pointer;
    transition: all .15s;
    white-space: nowrap;
}
.ks-seg button:hover { color: var(--ks-ink); }
.ks-seg button.on {
    background: var(--ks-paper);
    color: var(--ks-accent);
    box-shadow: 0 2px 7px rgba(66, 58, 38, .1);
}

/* 标签按钮 */
.ks-chips { display: flex; gap: 6px; flex-wrap: wrap; }
.ks-chip {
    border: 1px solid var(--ks-line);
    background: var(--ks-paper);
    color: var(--ks-sub);
    font-family: inherit;
    font-size: 12.5px;
    font-weight: 700;
    padding: 7px 13px;
    border-radius: 999px;
    cursor: pointer;
    transition: all .15s;
}
.ks-chip:hover { border-color: var(--ks-accent); color: var(--ks-accent); }
.ks-chip.on {
    background: var(--ks-accent);
    border-color: var(--ks-accent);
    color: #fff;
}
.ks-chip.on.warm { background: var(--ks-warm); border-color: var(--ks-warm); color: #451a03; }

/* 开关 */
.ks-switch { display: flex; align-items: center; gap: 8px; font-size: 12.5px; color: var(--ks-sub); cursor: pointer; }
.ks-switch input { width: 16px; height: 16px; accent-color: var(--ks-accent); cursor: pointer; }

/* ---------- 按钮 ---------- */
.ks-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border: 1.5px solid var(--ks-line);
    background: var(--ks-paper);
    color: var(--ks-ink);
    font-family: inherit;
    font-size: 13.5px;
    font-weight: 800;
    padding: 10px 18px;
    border-radius: 11px;
    cursor: pointer;
    transition: transform .12s, background .15s, border-color .15s, box-shadow .15s;
}
.ks-btn:hover { border-color: var(--ks-accent); color: var(--ks-accent); }
.ks-btn:active { transform: translateY(1px); }
.ks-btn:disabled { opacity: .5; cursor: not-allowed; }
.ks-btn-main {
    background: var(--ks-accent);
    border-color: var(--ks-accent);
    color: #fff;
    box-shadow: 0 8px 20px rgba(79, 70, 229, .22);
}
.ks-btn-main:hover { background: #4338ca; border-color: #4338ca; color: #fff; }
.ks-btn-warm {
    background: var(--ks-warm);
    border-color: var(--ks-warm);
    color: #451a03;
    box-shadow: 0 8px 20px rgba(245, 158, 11, .24);
}
.ks-btn-warm:hover { background: #d97706; border-color: #d97706; color: #451a03; }
.ks-btn-ghost { background: transparent; }
.ks-btn-sm { font-size: 12.5px; padding: 7px 13px; border-radius: 9px; }
.ks-btn-block { width: 100%; }
.ks-link {
    border: 0;
    background: none;
    color: var(--ks-accent);
    font-family: inherit;
    font-size: 12.5px;
    font-weight: 800;
    cursor: pointer;
    padding: 2px 4px;
}
.ks-link:hover { text-decoration: underline; }

/* ---------- 状态 / 提示 ---------- */
.ks-status {
    font-size: 12.5px;
    line-height: 1.7;
    color: var(--ks-sub);
    margin: 10px 0 0;
    padding: 9px 12px;
    border-radius: 10px;
    background: var(--ks-soft);
    border: 1px solid var(--ks-line);
}
.ks-status.ok { background: var(--ks-green-soft); border-color: transparent; color: var(--ks-green); }
.ks-status.err { background: var(--ks-red-soft); border-color: transparent; color: var(--ks-red); }
.ks-status.warn { background: var(--ks-warm-soft); border-color: transparent; color: #b45309; }
[data-theme="dark"] .ks-status.warn { color: var(--ks-warm); }

.ks-note {
    font-size: 12px;
    line-height: 1.9;
    color: var(--ks-mute);
    border-left: 3px solid var(--ks-line);
    padding-left: 10px;
    margin: 12px 0 0;
}

.ks-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 10.5px;
    font-weight: 900;
    letter-spacing: .5px;
    padding: 3px 8px;
    border-radius: 6px;
    background: var(--ks-accent-soft);
    color: var(--ks-accent);
}
.ks-badge.warm { background: var(--ks-warm-soft); color: #b45309; }
[data-theme="dark"] .ks-badge.warm { color: var(--ks-warm); }
.ks-badge.green { background: var(--ks-green-soft); color: var(--ks-green); }
.ks-badge.red { background: var(--ks-red-soft); color: var(--ks-red); }

.ks-empty {
    text-align: center;
    padding: 40px 16px;
    color: var(--ks-mute);
    font-size: 13px;
    line-height: 1.9;
}
.ks-empty strong { display: block; color: var(--ks-sub); font-size: 14px; margin-bottom: 6px; }

/* ---------- 主区域卡片 ---------- */
.ks-main {
    background: var(--ks-paper);
    border: 1px solid var(--ks-line);
    border-radius: var(--ks-radius);
    box-shadow: var(--ks-shadow);
    overflow: hidden;
}
.ks-main-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 14px 18px;
    border-bottom: 1px solid var(--ks-line);
    background: var(--ks-soft);
}
.ks-main-head b { font-size: 13.5px; font-weight: 900; }
.ks-main-head span { font-size: 11.5px; color: var(--ks-mute); font-weight: 700; }
.ks-main-body { padding: 18px; }

/* ---------- 统计 ---------- */
.ks-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.ks-stat {
    background: var(--ks-soft);
    border: 1px solid var(--ks-line);
    border-radius: 12px;
    padding: 10px 6px;
    text-align: center;
}
.ks-stat b { display: block; font-size: 21px; font-weight: 900; color: var(--ks-accent); line-height: 1.25; }
.ks-stat span { font-size: 10.5px; color: var(--ks-mute); font-weight: 800; }
.ks-stat.green b { color: var(--ks-green); }
.ks-stat.red b { color: var(--ks-red); }
.ks-stat.warm b { color: var(--ks-warm); }

/* ---------- SEO 正文 ---------- */
.ks-content {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin-top: 16px;
}
.ks-content .ks-article {
    grid-column: span 1;
    background: var(--ks-paper);
    border: 1px solid var(--ks-line);
    border-radius: var(--ks-radius);
    padding: 20px 22px;
    box-shadow: var(--ks-shadow);
}
.ks-content .ks-article.full { grid-column: 1 / -1; }
.ks-article h2 { margin: 0 0 10px; font-size: 16px; font-weight: 900; }
.ks-article h3 { margin: 16px 0 6px; font-size: 13.5px; font-weight: 900; color: var(--ks-ink); }
.ks-article p { margin: 0 0 12px; font-size: 13px; line-height: 1.95; color: var(--ks-sub); }
.ks-article ul, .ks-article ol { margin: 0 0 12px; padding-left: 20px; font-size: 13px; line-height: 1.95; color: var(--ks-sub); }
.ks-article li { margin-bottom: 5px; }
.ks-article b { color: var(--ks-ink); }
.ks-article .warm { color: var(--ks-warm); font-weight: 800; }
.ks-article details {
    border-bottom: 1px dashed var(--ks-line);
    padding: 9px 0;
    font-size: 13px;
    line-height: 1.9;
}
.ks-article details:last-child { border-bottom: 0; }
.ks-article summary {
    cursor: pointer;
    font-weight: 800;
    color: var(--ks-ink);
    list-style: none;
    position: relative;
    padding-left: 16px;
}
.ks-article summary::-webkit-details-marker { display: none; }
.ks-article summary::before {
    content: '＋';
    position: absolute;
    left: 0;
    color: var(--ks-accent);
    font-weight: 900;
}
.ks-article details[open] summary::before { content: '－'; }
.ks-article details p { margin: 8px 0 0; }
.ks-links { display: flex; gap: 8px; flex-wrap: wrap; }
.ks-links a {
    font-size: 12.5px;
    font-weight: 700;
    color: var(--ks-accent);
    background: var(--ks-accent-soft);
    border-radius: 8px;
    padding: 7px 12px;
    text-decoration: none;
}
.ks-links a:hover { background: var(--ks-accent); color: #fff; }

/* ---------- 打印 ---------- */
.ks-print-sheet {
    background: #fff;
    color: #111;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 18mm 14mm;
    margin: 0 auto;
    max-width: 210mm;
    box-shadow: 0 10px 30px rgba(0, 0, 0, .08);
}
.ks-print-sheet h2 { margin: 0 0 4mm; text-align: center; font-size: 20px; }
.ks-print-sheet .ks-ps-meta {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: #555;
    border-bottom: 1px solid #ddd;
    padding-bottom: 3mm;
    margin-bottom: 4mm;
}
.ks-ps-line { border-bottom: 1px solid #ccc; height: 9mm; }

@media print {
    .ks-noprint, .detail-breadcrumb, .back-to-top, header.site-header, footer.site-footer,
    .ks-hero, .ks-side, .ks-content, .ks-main, .ks-grid, .ks-panel, .ks-toolbar,
    .ks-print-hide { display: none !important; }
    body { background: #fff !important; }
    .ks-app { max-width: none; }
    .ks-main { border: 0; box-shadow: none; }
    .ks-main-body { padding: 0; }
    .ks-print-sheet { border: 0; box-shadow: none; padding: 0; }
    .ks-print-area { display: block !important; }
}
.ks-print-area { display: none; }

/* ---------- 底部悬浮提示 ---------- */
.ks-toast {
    position: fixed;
    left: 50%;
    bottom: 34px;
    transform: translateX(-50%) translateY(14px);
    background: rgba(24, 24, 27, .94);
    color: #fff;
    font-size: 13px;
    font-weight: 700;
    padding: 10px 18px;
    border-radius: 11px;
    opacity: 0;
    pointer-events: none;
    transition: all .22s;
    z-index: 9999;
    max-width: 86vw;
    text-align: center;
}
.ks-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
    .ks-grid { grid-template-columns: 1fr; }
    .ks-side { position: static; }
    .ks-hero-side { display: none; }
    .ks-content { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
    .ks-hero { padding: 20px 18px 20px 22px; }
    .ks-hero h1 { font-size: 20px; }
    .ks-stats { grid-template-columns: repeat(2, 1fr); }
    .ks-main-body { padding: 14px; }
    .ks-panel { padding: 15px; }
}