:root {
  --bg: #f4f7fb;
  --panel: #ffffff;
  --panel-soft: #f8fbff;
  --line: #e6edf7;
  --line-strong: #d5e1f2;
  --text: #111a34;
  --muted: #697894;
  --soft: #93a1bb;
  --blue: #2f72ff;
  --blue-light: #eef4ff;
  --blue-deep: #1231a7;
  --green: #15b47a;
  --green-light: #eafaf4;
  --orange: #ff9a21;
  --orange-light: #fff6e9;
  --red: #ff4f4a;
  --red-light: #fff0ef;
  --purple: #6d5df7;
  --purple-light: #f3f1ff;
  --cyan: #13bfd2;
  --cyan-light: #e8f9fb;
  --shadow: 0 10px 28px rgba(28, 48, 86, .08);
  --shadow-soft: 0 4px 16px rgba(28, 48, 86, .06);
  --shadow-hover: 0 8px 24px rgba(28, 48, 86, .12);
  --r: 8px;
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  --line-height-tight: 1.25;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.75;
  --letter-spacing-tight: -0.01em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.02em;
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 16px;
  --spacing-xl: 20px;
  --spacing-2xl: 24px;
  --spacing-3xl: 32px;
  --transition-fast: .15s ease;
  --transition-normal: .2s ease;
  --transition-slow: .3s ease;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  line-height: var(--line-height-normal);
  letter-spacing: var(--letter-spacing-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

button, input, select, textarea {
  font: inherit;
  line-height: var(--line-height-normal);
}

button {
  border: 0;
  cursor: pointer;
  font-family: inherit;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 228px minmax(0, 1fr);
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  background: #fff;
  border-right: 1px solid var(--line);
  padding: var(--spacing-2xl) var(--spacing-xl);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2xl);
  z-index: 5;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  background: transparent;
  color: var(--text);
  padding: 0;
  text-align: left;
}

.planet-logo {
  width: 58px;
  height: 46px;
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
}

.planet-logo svg { width: 58px; height: 46px; }

.brand-text {
  font-size: 24px;
  font-weight: 900;
  white-space: nowrap;
  letter-spacing: var(--letter-spacing-tight);
}

.nav-list {
  display: grid;
  gap: var(--spacing-md);
}

.nav-item {
  min-height: 52px;
  border-radius: var(--r);
  background: transparent;
  color: #68758f;
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: 0 var(--spacing-xl);
  font-size: 16px;
  font-weight: 700;
  text-align: left;
  transition: background var(--transition-normal), color var(--transition-normal), transform var(--transition-normal);
}

.nav-item:hover {
  background: var(--blue-light);
  color: var(--blue);
}

.nav-item.active {
  background: var(--blue-light);
  color: var(--blue);
  box-shadow: inset 4px 0 0 var(--blue);
}

[data-icon] {
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
}

[data-icon] svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.side-card {
  margin-top: auto;
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: var(--spacing-lg);
  background: linear-gradient(180deg, var(--panel-soft), #fff);
  box-shadow: var(--shadow-soft);
}

.side-card-title {
  font-weight: 900;
  margin-bottom: var(--spacing-sm);
  letter-spacing: var(--letter-spacing-tight);
}

.side-card-text {
  color: var(--muted);
  line-height: var(--line-height-relaxed);
  font-size: 13px;
  margin-bottom: var(--spacing-md);
  letter-spacing: var(--letter-spacing-wide);
}

.main {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 4;
  height: 76px;
  background: rgba(255,255,255,.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 var(--spacing-3xl);
  gap: var(--spacing-xl);
}

.search-box {
  width: min(640px, 48vw);
  height: 44px;
  border: 1px solid var(--line-strong);
  background: #f8fafc;
  border-radius: 14px;
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: 0 var(--spacing-md);
  color: var(--soft);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.search-box:focus-within {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(47, 114, 255, .1);
}

.search-box input {
  min-width: 0;
  flex: 1;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
  font-size: 14px;
  line-height: var(--line-height-normal);
}

.search-box input::placeholder {
  color: var(--soft);
}

kbd {
  font-size: 12px;
  color: #8190aa;
  border: 1px solid #d9e2f0;
  border-radius: 6px;
  padding: 2px 7px;
  background: #fff;
  font-family: inherit;
}

.top-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.icon-button {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: #fff;
  border: 1px solid var(--line);
  color: #5e6b85;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: transform var(--transition-normal), border-color var(--transition-normal), background var(--transition-normal);
}

.icon-button:hover {
  transform: translateY(-1px);
  border-color: #c8d6eb;
  background: var(--panel-soft);
}

.icon-button b {
  position: absolute;
  top: -8px;
  right: -7px;
  min-width: 20px;
  height: 20px;
  border-radius: 999px;
  background: var(--red);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  display: grid;
  place-items: center;
  border: 2px solid #fff;
}

.profile-chip {
  height: 44px;
  border-radius: 22px;
  background: #fff;
  border: 1px solid transparent;
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  color: #27324c;
  font-weight: 700;
  padding: 0 var(--spacing-md) 0 6px;
  transition: border-color var(--transition-normal);
}

.profile-chip:hover {
  border-color: var(--line-strong);
}

.avatar, .mini-avatar {
  border-radius: 50%;
  display: inline-grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, #77c4ff, #1c2d7a);
  font-weight: 900;
  overflow: hidden;
}

.avatar { width: 36px; height: 36px; }
.mini-avatar { width: 34px; height: 34px; font-size: 13px; }

.content {
  width: min(1360px, calc(100vw - 228px));
  margin: 0 auto;
  padding: 28px var(--spacing-3xl) 40px;
}

.page { display: none; }

.page.active {
  display: block;
  animation: rise .22s ease both;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: var(--spacing-xl);
}

.title-row {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-md);
}

h1 {
  font-size: 28px;
  margin: 0;
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
}

.subtitle {
  color: var(--muted);
  font-weight: 700;
  letter-spacing: var(--letter-spacing-wide);
}

.hero-row {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(360px, .9fr);
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.hero {
  min-height: 190px;
  border-radius: var(--r);
  padding: 34px 36px;
  color: #fff;
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow);
}

.hero.blue {
  background:
    radial-gradient(circle at 76% 28%, rgba(255,255,255,.36), transparent 0 4%, transparent 12%),
    radial-gradient(circle at 88% 60%, rgba(116, 143, 255, .42), transparent 0 16%, transparent 34%),
    linear-gradient(135deg, #09288f, #0b45df 58%, #422fe3);
}

.hero.green {
  background:
    radial-gradient(circle at 78% 46%, rgba(224,255,248,.76), transparent 0 15%, transparent 28%),
    linear-gradient(135deg, #02916f, #10b184 58%, #28d2b9);
}

.hero h2 {
  margin: 0 0 10px;
  font-size: 32px;
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
}

.hero p {
  margin: 0 0 var(--spacing-xl);
  font-weight: 700;
  opacity: .92;
  line-height: var(--line-height-normal);
  letter-spacing: var(--letter-spacing-wide);
}

.hero-art {
  position: absolute;
  right: 36px;
  bottom: 20px;
  width: 210px;
  height: 136px;
  opacity: .96;
}

.hero-art .orbit {
  position: absolute;
  inset: 45px 0 20px;
  border: 3px solid rgba(255,255,255,.32);
  border-radius: 50%;
  transform: rotate(-17deg);
}

.hero-art .planet {
  position: absolute;
  left: 20px;
  bottom: 16px;
  width: 74px;
  height: 74px;
  border-radius: 50%;
  background: linear-gradient(135deg, #ffcf62, #ef6f36);
  box-shadow: inset -12px -12px 0 rgba(85,34,143,.16);
}

.hero-art .book-stack {
  position: absolute;
  right: 8px;
  bottom: 10px;
  width: 120px;
  height: 96px;
}

.book-stack:before, .book-stack:after {
  content: "";
  position: absolute;
  border-radius: var(--r);
  background: rgba(255,255,255,.86);
  box-shadow: 0 12px 20px rgba(0,0,0,.12);
}

.book-stack:before { inset: 18px 8px 18px 0; transform: skewY(8deg); }
.book-stack:after { inset: 0 0 36px 18px; background: #bff4ee; }

.astronaut {
  position: absolute;
  right: 70px;
  top: 28px;
  width: 90px;
  height: 90px;
  border-radius: 50%;
  background: #fff;
  box-shadow: inset -10px -10px 0 #bed1ff;
}

.astronaut:after {
  content: "";
  position: absolute;
  left: 19px;
  top: 20px;
  width: 52px;
  height: 38px;
  border-radius: 28px;
  background: linear-gradient(135deg, #07195c, #2864ff);
  border: 4px solid #c8dbff;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.stat-card, .card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r);
  box-shadow: var(--shadow-soft);
}

.stat-card {
  min-height: 190px;
  padding: var(--spacing-xl);
  display: grid;
  align-content: center;
  justify-items: center;
  text-align: center;
  gap: var(--spacing-md);
}

.stat-icon {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  margin-bottom: var(--spacing-xs);
}

.stat-icon.blue { color: var(--blue); background: var(--blue-light); }
.stat-icon.green { color: var(--green); background: var(--green-light); }
.stat-icon.orange { color: var(--orange); background: var(--orange-light); }

.stat-label {
  color: var(--text);
  font-weight: 800;
  letter-spacing: var(--letter-spacing-wide);
}

.stat-num {
  font-size: 28px;
  font-weight: 900;
  letter-spacing: var(--letter-spacing-tight);
  font-variant-numeric: tabular-nums;
}

.stat-sub {
  color: var(--muted);
  line-height: var(--line-height-normal);
  letter-spacing: var(--letter-spacing-wide);
}

.up { color: var(--green); font-weight: 900; }
.down { color: var(--red); font-weight: 900; }

.grid-2 {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(430px, .85fr);
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.card {
  padding: 22px;
  min-width: 0;
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  margin-bottom: 18px;
}

.card-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 18px;
  font-weight: 900;
  letter-spacing: var(--letter-spacing-tight);
}

.card-link {
  color: var(--blue);
  background: transparent;
  font-weight: 800;
  transition: color var(--transition-fast);
}

.card-link:hover {
  color: var(--blue-deep);
}

.actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.button, .ghost, .danger {
  min-height: 38px;
  border-radius: var(--r);
  padding: 0 var(--spacing-lg);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  font-weight: 900;
  font-size: 14px;
  line-height: var(--line-height-normal);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), background var(--transition-normal), border-color var(--transition-normal);
}

.button {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 8px 20px rgba(47,114,255,.22);
}

.button:hover {
  background: var(--blue-deep);
  transform: translateY(-1px);
  box-shadow: var(--shadow-hover);
}

.button.green {
  background: var(--green);
  box-shadow: 0 8px 20px rgba(21,180,122,.18);
}

.button.green:hover {
  background: #129666;
}

.button.orange {
  background: var(--orange);
  box-shadow: 0 8px 20px rgba(255,154,33,.18);
}

.button.orange:hover {
  background: #e88a12;
}

.ghost {
  border: 1px solid var(--line-strong);
  color: var(--blue);
  background: #fff;
}

.ghost:hover {
  transform: translateY(-1px);
  border-color: var(--blue);
  background: var(--blue-light);
}

.danger {
  border: 1px solid #ffd2d0;
  background: #fff;
  color: var(--red);
}

.danger:hover {
  transform: translateY(-1px);
  background: var(--red-light);
}

.tiny {
  min-height: 30px;
  padding: 0 var(--spacing-md);
  font-size: 13px;
}

.course-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--spacing-lg);
}

.course-card {
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  background: #fff;
  min-width: 0;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.course-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: #cfdcf0;
}

.course-cover {
  height: 104px;
  padding: var(--spacing-md);
  color: #fff;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #6677ff, #1f47d8);
}

.course-cover.ai { background: linear-gradient(135deg, #15285f, #7a4af7); }
.course-cover.data { background: linear-gradient(135deg, #8da7ff, #5b6df6); }
.course-cover.office { background: linear-gradient(135deg, #273c70, #ff825c); }
.course-cover.growth { background: linear-gradient(135deg, #4c78ff, #6c5cff); }
.course-cover.product { background: linear-gradient(135deg, #1cae88, #62d0ff); }
.course-cover.python { background: linear-gradient(135deg, #16243f, #2b8fe8); }
.course-cover.short { background: linear-gradient(135deg, #0b5774, #75d665); }
.course-cover.offline { background: linear-gradient(135deg, #566e7f, #d8aa6d); }

.course-cover:after {
  content: "";
  position: absolute;
  right: -20px;
  top: 16px;
  width: 115px;
  height: 72px;
  border-radius: 22px;
  background: rgba(255,255,255,.18);
  transform: rotate(-18deg);
}

.tag {
  display: inline-flex;
  min-height: 24px;
  align-items: center;
  border-radius: 6px;
  padding: 0 var(--spacing-sm);
  background: var(--green);
  color: #fff;
  font-size: 12px;
  font-weight: 900;
  position: relative;
  z-index: 1;
  letter-spacing: var(--letter-spacing-wide);
}

.tag.red { background: var(--red); }
.tag.orange { background: var(--orange); }
.tag.blue { background: var(--blue); }
.tag.light {
  color: var(--blue);
  background: var(--blue-light);
}

.course-cover h3 {
  position: absolute;
  left: var(--spacing-md);
  bottom: var(--spacing-md);
  right: var(--spacing-md);
  margin: 0;
  font-size: 16px;
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
  z-index: 1;
}

.course-body { padding: var(--spacing-md); }

.course-name {
  font-weight: 900;
  line-height: var(--line-height-normal);
  margin-bottom: 6px;
  letter-spacing: var(--letter-spacing-tight);
}

.course-meta {
  color: var(--muted);
  font-size: 13px;
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-md);
  line-height: var(--line-height-normal);
}

.price {
  color: #ff2f2b;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
}

.star { color: var(--orange); font-weight: 900; }

.task-list, .plain-list {
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
}

.task-row, .list-row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) 92px 82px 92px;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.task-row:last-child, .list-row:last-child { border-bottom: 0; }
.task-row:hover, .list-row:hover { background: #fbfdff; }

.row-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--blue);
}

.row-icon.purple { background: var(--purple); }
.row-icon.green { background: var(--green); }
.row-icon.orange { background: var(--orange); }

.row-title {
  font-weight: 900;
  margin-bottom: var(--spacing-xs);
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-normal);
}

.row-sub {
  color: var(--muted);
  font-size: 13px;
  line-height: var(--line-height-normal);
  letter-spacing: var(--letter-spacing-wide);
}

.progress {
  height: 8px;
  border-radius: 999px;
  overflow: hidden;
  background: #e7eef9;
}

.progress span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--blue), #63a4ff);
  transition: width var(--transition-slow);
}

.metric-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--spacing-3xl);
}

.metric-label {
  color: var(--muted);
  margin-bottom: var(--spacing-md);
  font-size: 13px;
  letter-spacing: var(--letter-spacing-wide);
  white-space: nowrap;
}

.metric-value {
  font-size: 22px;
  font-weight: 900;
  margin-bottom: var(--spacing-md);
  letter-spacing: var(--letter-spacing-tight);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.chart-card {
  min-height: 176px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 200px;
  align-items: center;
  gap: var(--spacing-2xl);
  padding: 28px;
}

.line-chart {
  width: 100%;
  height: 120px;
}

.line-chart path.line {
  fill: none;
  stroke: var(--blue);
  stroke-width: 4;
  stroke-linecap: round;
}

.line-chart path.area { fill: rgba(47,114,255,.13); }

.badge-block {
  display: grid;
  place-items: center;
  gap: var(--spacing-sm);
}

.level-badge {
  width: 126px;
  height: 126px;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 30px;
  font-weight: 900;
  background: radial-gradient(circle, #6b7dff, #2638d4 66%, #15248b);
  clip-path: polygon(50% 0, 84% 16%, 100% 50%, 84% 84%, 50% 100%, 16% 84%, 0 50%, 16% 16%);
  box-shadow: 0 12px 30px rgba(61,83,255,.25);
}

.tabs, .segmented {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.tab, .segment {
  min-height: 36px;
  border-radius: var(--r);
  padding: 0 15px;
  background: transparent;
  color: var(--muted);
  font-weight: 900;
  font-size: 14px;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.tab:hover, .segment:hover {
  background: var(--blue-light);
  color: var(--blue);
}

.tab.active, .segment.active {
  color: var(--green);
  border-color: #c8f0df;
  background: #effbf6;
}

.segment.active {
  color: var(--blue);
  border-color: #bfd2ff;
  background: #f0f5ff;
}

.tool-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
}

.select-like, .input-like {
  min-height: 38px;
  border-radius: var(--r);
  border: 1px solid var(--line-strong);
  background: #fff;
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 0 var(--spacing-md);
  min-width: 128px;
  font-size: 14px;
  transition: border-color var(--transition-fast);
}

.select-like:hover, .input-like:hover {
  border-color: var(--blue);
}

.input-like input {
  border: 0;
  outline: 0;
  min-width: 150px;
  font-size: 14px;
  line-height: var(--line-height-normal);
}

.right-rail {
  display: grid;
  gap: var(--spacing-xl);
}

.recent-item, .reminder-item, .member-row, .asset-row, .order-row, .certificate-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--line);
}

.recent-item:last-child, .reminder-item:last-child, .member-row:last-child, .asset-row:last-child, .order-row:last-child, .certificate-row:last-child { border-bottom: 0; }

.thumb {
  width: 58px;
  height: 48px;
  border-radius: var(--r);
  background: linear-gradient(135deg, #3f64ff, #1d2b77);
  flex: 0 0 auto;
}

.thumb.ai { background: linear-gradient(135deg, #172461, #7b4cff); }
.thumb.data { background: linear-gradient(135deg, #8da7ff, #5b6df6); }
.thumb.green { background: linear-gradient(135deg, #0b9b78, #65ddc9); }
.thumb.dark { background: linear-gradient(135deg, #111827, #475569); }

.grow { flex: 1; min-width: 0; }

.line-clamp {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.circle-meter {
  width: 116px;
  height: 116px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: conic-gradient(var(--green) var(--value, 68%), #eaf0f8 0);
  position: relative;
}

.circle-meter:after {
  content: "";
  position: absolute;
  inset: var(--spacing-md);
  border-radius: 50%;
  background: #fff;
}

.circle-meter strong {
  position: relative;
  z-index: 1;
  font-size: 26px;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
}

.learning-summary {
  display: grid;
  grid-template-columns: 132px minmax(0,1fr);
  gap: 22px;
  align-items: center;
}

.summary-numbers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

.summary-numbers div {
  border-left: 1px solid var(--line);
  padding-left: 18px;
}

.summary-numbers strong {
  display: block;
  font-size: 24px;
  margin-bottom: var(--spacing-xs);
  font-variant-numeric: tabular-nums;
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.offline-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--spacing-md);
}

.offline-card {
  display: grid;
  grid-template-columns: 76px minmax(0,1fr);
  gap: var(--spacing-md);
  align-items: center;
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: var(--spacing-md);
}

.knowledge-layout {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr) 300px;
  gap: var(--spacing-xl);
}

.category-list {
  display: grid;
  gap: var(--spacing-sm);
}

.category-button {
  min-height: 42px;
  border-radius: var(--r);
  background: transparent;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 var(--spacing-md);
  font-weight: 800;
  font-size: 14px;
  transition: all var(--transition-fast);
}

.category-button:hover {
  background: var(--blue-light);
  color: var(--blue);
}

.category-button.active {
  background: var(--blue-light);
  color: var(--blue);
}

.knowledge-row {
  display: grid;
  grid-template-columns: 42px minmax(0,1fr) 90px 116px 42px;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--line);
}

.knowledge-row:last-child { border-bottom: 0; }

.fav {
  width: 34px;
  height: 34px;
  border-radius: var(--r);
  background: transparent;
  color: #b5c0d2;
  transition: color var(--transition-fast);
}

.fav:hover { color: var(--orange); }
.fav.active { color: var(--orange); }

.ai-box {
  background: linear-gradient(180deg, #f2f7ff, #fff);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: var(--spacing-lg);
}

.ai-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.ai-action {
  min-height: 78px;
  border-radius: var(--r);
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  display: grid;
  place-items: center;
  gap: var(--spacing-xs);
  font-weight: 900;
  transition: all var(--transition-fast);
}

.ai-action:hover {
  border-color: var(--blue);
  background: var(--blue-light);
}

.team-top {
  display: grid;
  grid-template-columns: minmax(0,1.2fr) 330px minmax(0,.8fr);
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.team-card-main {
  display: grid;
  grid-template-columns: 92px minmax(0,1fr);
  gap: var(--spacing-xl);
  align-items: center;
}

.team-mark {
  width: 92px;
  height: 92px;
  border-radius: 16px;
  background: linear-gradient(135deg, #5b68ff, #1c26af);
  display: grid;
  place-items: center;
  color: #fff;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.25);
}

.pool-card {
  background: linear-gradient(135deg, #ff4f4a, #ff8f3c);
  color: #fff;
  border: 0;
  overflow: hidden;
  position: relative;
}

.pool-card:after {
  content: "¥";
  position: absolute;
  right: 22px;
  top: -20px;
  font-size: 128px;
  font-weight: 900;
  opacity: .12;
}

.pool-num {
  font-size: 36px;
  font-weight: 900;
  margin: 10px 0;
  font-variant-numeric: tabular-nums;
}

.rank-num {
  width: 34px;
  text-align: center;
  font-size: 20px;
  font-weight: 900;
  color: var(--soft);
  font-variant-numeric: tabular-nums;
}

.rank-num.top { color: var(--orange); }

.reward-rule {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.rule-flow {
  display: grid;
  grid-template-columns: 1fr 36px 1fr 36px 1fr;
  align-items: center;
  gap: var(--spacing-md);
}

.rule-step {
  border-radius: var(--r);
  background: #fff7ed;
  padding: var(--spacing-md);
  text-align: center;
}

.profile-hero {
  display: grid;
}

.empty {
  text-align: center;
  padding: 40px var(--spacing-xl);
  color: var(--muted);
  line-height: var(--line-height-relaxed);
}

.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--text);
  color: #fff;
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: 10px;
  font-weight: 700;
  opacity: 0;
  transition: transform .3s ease, opacity .3s ease;
  z-index: 100;
  box-shadow: var(--shadow);
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.modal-layer {
  position: fixed;
  inset: 0;
  background: rgba(17, 26, 52, .4);
  display: grid;
  place-items: center;
  z-index: 50;
  backdrop-filter: blur(4px);
}

.modal-card {
  background: #fff;
  border-radius: 16px;
  padding: var(--spacing-xl);
  min-width: 320px;
  max-width: 90vw;
  max-height: 90vh;
  overflow: auto;
  position: relative;
  box-shadow: var(--shadow);
}

.modal-close {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
}

.drawer-layer {
  position: fixed;
  inset: 0;
  z-index: 50;
}

.drawer-card {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 420px;
  max-width: 90vw;
  background: #fff;
  box-shadow: -8px 0 32px rgba(28, 48, 86, .12);
  overflow: auto;
}

@media (max-width: 1200px) {
  .hero-row {
    grid-template-columns: 1fr;
  }
  
  .grid-2 {
    grid-template-columns: 1fr;
  }
  
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .course-strip {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .course-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .knowledge-layout {
    grid-template-columns: 1fr;
  }
  
  .team-top {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .app-shell {
    grid-template-columns: 1fr;
  }
  
  .sidebar {
    position: fixed;
    left: -240px;
    height: 100vh;
    width: 240px;
    transition: left var(--transition-slow);
    z-index: 100;
  }
  
  .sidebar.open {
    left: 0;
  }
  
  .content {
    width: 100%;
    padding: var(--spacing-lg);
  }
  
  .stat-grid {
    grid-template-columns: 1fr;
  }
  
  .grid-3 {
    grid-template-columns: 1fr;
  }
  
  .course-strip, .course-grid {
    grid-template-columns: 1fr;
  }
  
  .metric-row {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .task-row, .list-row {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: var(--spacing-md);
  }
  
  .task-row > *:nth-child(3),
  .task-row > *:nth-child(4),
  .task-row > *:nth-child(5) {
    display: none;
  }
  
  h1 {
    font-size: 22px;
  }
  
  .hero h2 {
    font-size: 24px;
  }
  
  .topbar {
    padding: 0 var(--spacing-lg);
  }
  
  .search-box {
    width: 100%;
  }
  
  .top-actions {
    display: none;
  }
}

@media (max-width: 480px) {
  .metric-row {
    grid-template-columns: 1fr;
  }
  
  .summary-numbers {
    grid-template-columns: 1fr;
  }
  
  .summary-numbers div {
    border-left: 0;
    border-bottom: 1px solid var(--line);
    padding-left: 0;
    padding-bottom: var(--spacing-md);
  }
  
  .chart-card {
    grid-template-columns: 1fr;
  }
  
  .learning-summary {
    grid-template-columns: 1fr;
    text-align: center;
  }
}