:root {
	--ink: #17152b;
	--muted: #76738b;
	--line: #e9e6f4;
	--paper: #ffffff;
	--soft: #f7f5ff;
	--primary: #6942e8;
	--primary-dark: #4c28c4;
	--accent: #ff5b8d;
	--success: #19a875;
	--danger: #df4455;
	--shadow: 0 18px 45px rgba(48, 30, 102, .1);
	font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: radial-gradient(circle at 8% 0, #eee8ff 0, transparent 26rem), #f4f3f9; }
button, input, select, textarea { font: inherit; }
button, .file-btn { cursor: pointer; }
.hidden { display: none !important; }
.page-shell { width: min(1680px, calc(100% - 48px)); margin: 28px auto 56px; }
.topbar { display: flex; justify-content: space-between; gap: 28px; align-items: flex-end; padding: 30px 34px; color: #fff; border-radius: 24px; background: linear-gradient(125deg, #342071, #6740e5 58%, #a96af4); box-shadow: 0 24px 55px rgba(82, 48, 184, .24); position: relative; overflow: hidden; }
.topbar::after { content: ""; position: absolute; width: 420px; height: 420px; right: -80px; top: -260px; border: 1px solid rgba(255,255,255,.28); border-radius: 50%; box-shadow: 0 0 0 50px rgba(255,255,255,.04), 0 0 0 110px rgba(255,255,255,.03); pointer-events: none; }
.brand-row { display: flex; gap: 26px; align-items: flex-start; position: relative; z-index: 1; }
.back-link { color: #fff; text-decoration: none; padding: 10px 14px; border: 1px solid rgba(255,255,255,.25); border-radius: 12px; white-space: nowrap; }
.eyebrow { margin: 0 0 7px; font-size: 11px; font-weight: 800; letter-spacing: .14em; opacity: .7; }
h1, h2, h3, p { margin-top: 0; }
.topbar h1 { font-size: 34px; margin-bottom: 8px; }
.topbar p { margin-bottom: 0; color: rgba(255,255,255,.78); }
.top-actions { display: flex; flex-wrap: wrap; gap: 10px; justify-content: flex-end; position: relative; z-index: 1; }
.btn { min-height: 42px; padding: 0 18px; border-radius: 12px; border: 1px solid #dcd7ed; background: #fff; color: #4b4267; font-weight: 700; transition: transform .15s, box-shadow .15s, border-color .15s; display: inline-flex; align-items: center; justify-content: center; gap: 7px; }
.btn:hover { transform: translateY(-1px); border-color: #ad9bf1; box-shadow: 0 8px 20px rgba(72, 45, 160, .12); }
.topbar .btn.ghost { color: #fff; border-color: rgba(255,255,255,.28); background: rgba(255,255,255,.11); }
.btn.primary { color: #fff; border-color: transparent; background: linear-gradient(135deg, var(--primary), #8d55ed); }
.btn.danger { color: var(--danger); background: #fff4f5; border-color: #ffd5db; }
.btn.small { min-height: 36px; padding: 0 13px; font-size: 13px; }
.file-btn input, .upload-btn input { display: none; }
.summary-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin: 18px 0; }
.summary-grid article { min-height: 102px; padding: 22px 24px; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,.9); box-shadow: 0 9px 28px rgba(50, 37, 90, .05); }
.summary-grid span { color: var(--muted); font-size: 13px; }
.summary-grid strong { display: block; margin-top: 8px; font-size: 30px; line-height: 1; }
.notice { margin: 0 0 16px; padding: 13px 16px; border: 1px solid #ccefe2; color: #087953; border-radius: 12px; background: #edfff8; }
.notice.error { color: #a82032; border-color: #ffd4da; background: #fff3f5; }
.workspace { display: grid; grid-template-columns: 390px minmax(0, 1fr); gap: 18px; align-items: start; }
.library-panel, .editor-panel { border: 1px solid var(--line); border-radius: 20px; background: rgba(255,255,255,.96); box-shadow: var(--shadow); }
.library-panel { padding: 22px; position: sticky; top: 18px; max-height: calc(100vh - 36px); overflow: hidden; display: flex; flex-direction: column; }
.panel-head, .editor-title-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.panel-head h2, .editor-title-row h2 { margin-bottom: 0; }
.count-pill, .status-chip { padding: 7px 11px; border-radius: 999px; color: #6942e8; background: #f0ebff; font-size: 12px; font-weight: 800; }
.filters { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; margin: 18px 0 13px; }
.filters input { grid-column: 1 / -1; }
input, select, textarea { width: 100%; color: var(--ink); border: 1px solid #ddd9ea; border-radius: 11px; background: #fff; outline: none; }
input, select { min-height: 42px; padding: 0 12px; }
textarea { padding: 11px 12px; resize: vertical; line-height: 1.65; }
input:focus, select:focus, textarea:focus { border-color: #8e70ef; box-shadow: 0 0 0 3px rgba(105,66,232,.1); }
.guide-list { overflow: auto; min-height: 260px; padding-right: 4px; }
.guide-item { width: 100%; display: grid; grid-template-columns: 46px 1fr auto; gap: 11px; align-items: center; padding: 13px 10px; border: 1px solid transparent; border-radius: 14px; background: transparent; text-align: left; color: inherit; }
.guide-item:hover, .guide-item.active { border-color: #dcd3fb; background: #f7f4ff; }
.guide-icon { width: 46px; height: 46px; display: grid; place-items: center; color: #fff; border-radius: 13px; background: linear-gradient(135deg, #5b35d8, #a66cf1); font-weight: 900; font-size: 12px; }
.guide-item.controller .guide-icon { background: linear-gradient(135deg, #173d83, #2e7bdc); }
.guide-copy strong, .guide-copy small { display: block; }
.guide-copy strong { margin-bottom: 4px; font-size: 14px; }
.guide-copy small { max-width: 205px; color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.state-dot { width: 8px; height: 8px; border-radius: 50%; background: #a8a4b6; }
.state-dot.published { background: var(--success); box-shadow: 0 0 0 4px rgba(25,168,117,.12); }
.empty { padding: 50px 20px; color: var(--muted); text-align: center; border: 1px dashed #dcd7e9; border-radius: 14px; }
.editor-panel { padding: 26px; }
.editor-title-row { padding: 2px 2px 20px; }
.editor-title-row p { margin-bottom: 0; color: var(--muted); }
.form-card { padding: 22px; margin-bottom: 15px; border: 1px solid var(--line); border-radius: 17px; background: #fff; }
.section-title { display: flex; align-items: flex-start; gap: 12px; }
.section-title > span { width: 34px; height: 34px; display: grid; place-items: center; flex: 0 0 auto; border-radius: 10px; color: #6741dc; background: #eee9ff; font-size: 12px; font-weight: 900; }
.section-title h3 { margin-bottom: 4px; font-size: 18px; }
.section-title p { color: var(--muted); font-size: 13px; margin-bottom: 18px; }
.section-title.split { justify-content: space-between; align-items: flex-start; }
.form-grid { display: grid; gap: 13px; margin-bottom: 13px; }
.form-grid.three { grid-template-columns: repeat(3, 1fr); }
.form-grid.two { grid-template-columns: repeat(2, 1fr); }
label > span { display: block; margin: 0 0 7px; color: #5f5a72; font-size: 12px; font-weight: 700; }
.asset-row { display: grid; grid-template-columns: 200px 1fr; gap: 16px; margin-bottom: 14px; }
.cover-preview { aspect-ratio: 16 / 9; display: grid; place-items: center; overflow: hidden; border: 1px dashed #cfc7ea; border-radius: 14px; color: var(--muted); background: #f8f6ff; }
.cover-preview img { width: 100%; height: 100%; object-fit: cover; }
.asset-fields { display: flex; flex-direction: column; gap: 8px; }
.asset-fields small { color: var(--muted); }
.upload-btn { width: max-content; color: #6741dc; background: #f4f0ff; }
.builder-list { display: grid; gap: 12px; }
.chapter-card { border: 1px solid #e3dff0; border-radius: 15px; overflow: hidden; }
.chapter-head { display: grid; grid-template-columns: 72px 1.2fr 1fr auto; gap: 9px; align-items: end; padding: 14px; background: #f8f6fd; }
.chapter-meta-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; padding: 14px; border-top: 1px solid #ece8f5; background: #fff; }
.chapter-meta-grid .wide { grid-column: 1 / -1; }
.chapter-meta-grid [data-field="videoUrl"] { border-color: #e2c2d5; background: linear-gradient(90deg,#fff,#fff8fb); }
.icon-btn { width: 36px; height: 36px; border: 1px solid #e2ddeb; border-radius: 10px; background: #fff; color: #8b839d; }
.icon-btn:hover { color: var(--danger); border-color: #ffd1d8; }
.sections { padding: 12px; display: grid; gap: 10px; }
.section-card { padding: 14px; border: 1px solid #ece8f3; border-radius: 13px; background: #fff; }
.section-card-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.section-card-head strong { font-size: 13px; }
.section-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.section-grid .wide { grid-column: 1 / -1; }
.section-image-row { display: grid; grid-template-columns: 1fr auto; gap: 8px; align-items: end; }
.add-section { margin: 0 12px 12px; }
.control-head, .control-row { display: grid; grid-template-columns: 100px 1fr 2fr 1fr 42px; gap: 9px; align-items: center; }
.control-head { padding: 0 3px 8px; color: var(--muted); font-size: 12px; }
.control-list { display: grid; gap: 9px; }
.control-row { padding: 10px; border: 1px solid #ebe7f3; border-radius: 12px; background: #fbfaff; }
.savebar { position: sticky; bottom: 12px; display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px; border: 1px solid rgba(221,216,236,.9); border-radius: 16px; background: rgba(255,255,255,.92); box-shadow: 0 16px 40px rgba(48,30,102,.14); backdrop-filter: blur(16px); }
.save-actions { display: flex; gap: 10px; }
@media (max-width: 1120px) { .workspace { grid-template-columns: 310px minmax(0,1fr); } .form-grid.three { grid-template-columns: 1fr 1fr; } }
@media (max-width: 820px) { .page-shell { width: min(100% - 20px, 100%); margin-top: 10px; } .topbar { align-items: flex-start; flex-direction: column; padding: 22px; } .brand-row { flex-direction: column; gap: 15px; } .summary-grid { grid-template-columns: 1fr 1fr; } .workspace { grid-template-columns: 1fr; } .library-panel { position: static; max-height: none; } .form-grid.three, .form-grid.two, .section-grid, .chapter-meta-grid { grid-template-columns: 1fr; } .section-grid .wide, .chapter-meta-grid .wide { grid-column: auto; } .asset-row { grid-template-columns: 1fr; } .chapter-head { grid-template-columns: 68px 1fr; } .control-head { display: none; } .control-row { grid-template-columns: 1fr 1fr; } }