/* ===== 越南美妆达人赋能平台 · 视觉规范 =====
   底色 #FBF7F6 · 卡片白 + 1px #F1E6E3 · 主色玫红 #BE185D · 文字 #2A1F23 / #6B5F63
   手机：底部导航；电脑（≥1024px）：左侧边栏 */

:root {
  --ground: #FBF7F6;
  --card: #FFFFFF;
  --line: #F1E6E3;
  --line-strong: #E5D7DA;
  --ink: #2A1F23;
  --ink-2: #6B5F63;
  --accent: #BE185D;
  --accent-hover: #9D174D;
  --accent-soft: #FCE7F1;
  --accent-ink: #9D174D;
  --dark: #2A1F23;
  --dark-line: #4A3A40;
  --dark-ink-2: #E9D5DB;
  --pink-light: #F9A8D4;
  --ok-bg: #DCFCE7; --ok-ink: #166534;
  --warn-bg: #FEF3C7; --warn-ink: #78350F;
  --err-bg: #FEE2E2; --err-ink: #991B1B;
  --tint-1: #F6E3E8; --tint-2: #F3E6F0; --tint-3: #EAD7DC;
  --r-card: 20px; --r-md: 12px; --r-sm: 8px;
  --font: 'Be Vietnam Pro', 'PingFang SC', 'Noto Sans SC', 'Noto Sans CJK SC', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --tabbar-h: 68px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--ground); color: var(--ink); font-family: var(--font); font-size: 15px; line-height: 1.5; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }
img, video { max-width: 100%; display: block; }
h1, h2, h3, h4 { margin: 0; line-height: 1.3; }
p { margin: 0; }
button, input, select, textarea { font: inherit; color: inherit; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.muted { color: var(--ink-2); }
.small { font-size: 13px; }
.xs { font-size: 12px; }
.bold { font-weight: 700; }
.nowrap { white-space: nowrap; }
.hidden { display: none !important; }
.stack { display: flex; flex-direction: column; gap: 12px; }
.stack-lg { display: flex; flex-direction: column; gap: 20px; }
.row { display: flex; align-items: center; gap: 10px; }
.row-between { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.wrap { flex-wrap: wrap; }
.grow { flex: 1; min-width: 0; }

/* ---------- 按钮 ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 0 18px;
  border-radius: var(--r-md); border: 1px solid var(--line-strong); background: var(--card); color: var(--ink);
  font-weight: 600; font-size: 14px; cursor: pointer; text-decoration: none; transition: background .15s, border-color .15s; white-space: nowrap; flex-shrink: 0; }
.btn:hover { border-color: var(--ink-2); color: var(--ink); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }
.btn-dark { background: var(--dark); border-color: var(--dark); color: #fff; }
.btn-dark:hover { color: #fff; opacity: .92; }
.btn-ghost { border-color: transparent; background: transparent; }
.btn-sm { min-height: 36px; padding: 0 12px; font-size: 13px; border-radius: 10px; }
.btn-block { width: 100%; }
.btn[disabled], .btn.is-loading { opacity: .6; pointer-events: none; }
.icon-btn { width: 44px; height: 44px; border-radius: 22px; border: 1px solid var(--line); background: var(--card);
  display: inline-flex; align-items: center; justify-content: center; color: var(--ink); cursor: pointer; flex-shrink: 0; }
.link-btn { background: none; border: none; padding: 0; color: var(--accent); font-weight: 600; cursor: pointer; font-size: 13px; }

/* ---------- 卡片 / 标签 ---------- */
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-card); padding: 16px; }
.card-lg { padding: 20px; }
.card-dark { background: var(--dark); border-color: var(--dark); color: #fff; }
.card-accent { border: 1.5px solid var(--accent); }
.chip { display: inline-flex; align-items: center; gap: 4px; padding: 5px 11px; border-radius: 999px; font-size: 12px;
  font-weight: 600; background: var(--accent-soft); color: var(--accent-ink); white-space: nowrap; }
.chip-outline { background: var(--card); border: 1px solid var(--line-strong); color: var(--ink-2); font-weight: 500; }
.badge { display: inline-flex; align-items: center; padding: 3px 8px; border-radius: 6px; font-size: 12px; font-weight: 700;
  background: var(--accent-soft); color: var(--accent-ink); white-space: nowrap; }
.badge-dark { background: var(--dark); color: #fff; }
.badge-ok { background: var(--ok-bg); color: var(--ok-ink); }
.badge-warn { background: var(--warn-bg); color: var(--warn-ink); }
.badge-err { background: var(--err-bg); color: var(--err-ink); }
.badge-grey { background: #F2EEEE; color: var(--ink-2); }
.notice { padding: 12px 14px; border-radius: var(--r-md); font-size: 13px; line-height: 1.55; }
.notice-warn { background: var(--warn-bg); color: var(--warn-ink); }
.notice-ok { background: var(--ok-bg); color: var(--ok-ink); }
.notice-err { background: var(--err-bg); color: var(--err-ink); }
.notice-soft { background: #FDF2F8; color: #831843; }

/* 筛选 pill */
.pills { display: flex; gap: 6px; overflow-x: auto; padding-bottom: 2px; scrollbar-width: none; }
.pills::-webkit-scrollbar { display: none; }
.pill { padding: 7px 13px; border-radius: 999px; background: var(--card); color: var(--ink-2); font-size: 13px;
  border: 1px solid var(--line); white-space: nowrap; cursor: pointer; }
.pill:hover { color: var(--ink); }
.pill.is-on { background: var(--dark); border-color: var(--dark); color: #fff; font-weight: 600; }

/* ---------- 表单 ---------- */
.field { display: flex; flex-direction: column; gap: 6px; }
.field > label, .label { font-size: 13px; font-weight: 600; color: var(--ink-2); }
.input, .select, .textarea { width: 100%; min-height: 44px; padding: 10px 14px; border-radius: var(--r-md);
  border: 1px solid var(--line-strong); background: var(--card); outline: none; font-size: 15px; }
.textarea { min-height: 96px; resize: vertical; line-height: 1.5; }
.input:focus, .select:focus, .textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.choice-grid { display: flex; flex-wrap: wrap; gap: 8px; }
.choice { position: relative; }
.choice input { position: absolute; opacity: 0; pointer-events: none; }
.choice span { display: inline-flex; align-items: center; min-height: 40px; padding: 0 14px; border-radius: 999px;
  border: 1px solid var(--line-strong); background: var(--card); font-size: 14px; cursor: pointer; }
.choice input:checked + span { background: var(--dark); border-color: var(--dark); color: #fff; font-weight: 600; }
.choice input:focus-visible + span { box-shadow: 0 0 0 3px var(--accent-soft); }

/* ---------- 提示条 ---------- */
.flashes { display: flex; flex-direction: column; gap: 8px; margin-bottom: 14px; }
.flash { padding: 12px 14px; border-radius: var(--r-md); font-size: 14px; }
.flash-error { background: var(--err-bg); color: var(--err-ink); }
.flash-ok { background: var(--ok-bg); color: var(--ok-ink); }
.toast { position: fixed; left: 50%; bottom: calc(var(--tabbar-h) + 84px); transform: translateX(-50%); z-index: 80;
  background: var(--dark); color: #fff; padding: 10px 16px; border-radius: 999px; font-size: 14px; box-shadow: 0 8px 24px rgba(0,0,0,.18);
  opacity: 0; transition: opacity .2s; pointer-events: none; max-width: calc(100% - 32px); text-align: center; }
.toast.is-on { opacity: 1; }

/* =================== 达人端外壳 =================== */
.shell { min-height: 100vh; }
.sidebar { display: none; }
.main { min-width: 0; }
.topbar { display: flex; align-items: center; gap: 12px; padding: 20px 16px 8px; }
.content { padding: 8px 16px calc(var(--tabbar-h) + 96px); max-width: 1200px; margin: 0 auto; }
.page-title { font-size: 22px; font-weight: 700; }
.page-sub { font-size: 13px; color: var(--ink-2); margin-top: 2px; }
.avatar { width: 44px; height: 44px; border-radius: 22px; background: var(--accent-soft); color: var(--accent-ink);
  display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 17px; flex-shrink: 0; }
.lang-switch { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; overflow: hidden; background: var(--card); }
.lang-switch a { padding: 6px 10px; font-size: 12px; color: var(--ink-2); font-weight: 600; min-width: 36px; text-align: center; }
.lang-switch a.is-on { background: var(--dark); color: #fff; }

.tabbar { position: fixed; left: 0; right: 0; bottom: 0; height: var(--tabbar-h); z-index: 40; background: var(--card);
  border-top: 1px solid var(--line); display: flex; justify-content: space-around; align-items: center; padding: 0 4px env(safe-area-inset-bottom); }
.tab { min-width: 58px; display: flex; flex-direction: column; align-items: center; gap: 3px; color: var(--ink-2);
  font-size: 11px; font-weight: 500; padding: 6px 0; }
.tab.is-on { color: var(--accent); font-weight: 700; }
.tab:hover { color: var(--accent); }

.ai-fab { position: fixed; right: 16px; bottom: calc(var(--tabbar-h) + 16px); z-index: 45; height: 48px; padding: 0 18px 0 14px;
  border-radius: 24px; background: var(--accent); color: #fff; display: inline-flex; align-items: center; gap: 8px;
  font-size: 14px; font-weight: 600; box-shadow: 0 6px 18px rgba(190, 24, 93, .30); border: none; cursor: pointer; }
.ai-fab:hover { background: var(--accent-hover); color: #fff; }
.ai-fab.raised { bottom: calc(var(--tabbar-h) + 84px); }

/* 侧边抽屉（电脑端 AI 助手） */
.drawer-backdrop { position: fixed; inset: 0; background: rgba(42,31,35,.28); z-index: 60; opacity: 0; pointer-events: none; transition: opacity .2s; }
.drawer { position: fixed; top: 0; right: 0; bottom: 0; width: 420px; max-width: 100%; background: var(--ground); z-index: 61;
  transform: translateX(100%); transition: transform .25s ease; display: flex; flex-direction: column; border-left: 1px solid var(--line);
  box-shadow: -12px 0 32px rgba(42,31,35,.10); }
.drawer-open .drawer { transform: translateX(0); }
.drawer-open .drawer-backdrop { opacity: 1; pointer-events: auto; }

/* =================== 首页 =================== */
.home-grid { display: flex; flex-direction: column; gap: 18px; }
.hero { padding: 20px; display: flex; flex-direction: column; gap: 14px; }
.hero .label-2 { font-size: 13px; color: var(--dark-ink-2); }
.hero .big { font-size: 30px; font-weight: 700; letter-spacing: -.5px; }
.hero .stat { color: var(--dark-ink-2); font-size: 13px; }
.hero .stat b { color: #fff; }
.hero hr { border: none; height: 1px; background: var(--dark-line); margin: 0; }
.levelbar { display: flex; gap: 6px; }
.levelbar span { flex: 1; height: 6px; border-radius: 3px; background: var(--dark-line); }
.levelbar span.is-on { background: #F472B6; }
.levelnames { display: flex; justify-content: space-between; font-size: 12px; color: var(--dark-ink-2); }
.levelnames .is-on { color: #fff; font-weight: 600; }
.quick { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; }
.quick a { display: flex; flex-direction: column; align-items: center; gap: 8px; color: var(--ink); font-size: 12px; font-weight: 600; text-align: center; }
.quick .ico { width: 54px; height: 54px; border-radius: 18px; background: var(--accent-soft); color: var(--accent);
  display: flex; align-items: center; justify-content: center; }
.task { display: flex; align-items: center; gap: 10px; font-size: 14px; }
.task .dot { width: 22px; height: 22px; border-radius: 11px; border: 1.5px solid #CDBFC3; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center; color: #fff; font-size: 12px; }
.task.is-done .dot { background: var(--accent); border-color: var(--accent); }
.task.is-done .txt { color: var(--ink-2); text-decoration: line-through; }
.task .go { padding: 6px 12px; border-radius: 999px; background: var(--accent-soft); font-size: 12px; font-weight: 600; color: var(--accent-ink); white-space: nowrap; }
.section-head { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.section-head h2 { font-size: 16px; font-weight: 700; }

/* 产品卡 */
.prod-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.prod-mini { overflow: hidden; display: flex; flex-direction: column; color: var(--ink); padding: 0; }
.prod-mini .thumb { height: 104px; }
.prod-mini .info { padding: 12px; display: flex; flex-direction: column; gap: 6px; }
.thumb { background: var(--tint-1); display: flex; align-items: center; justify-content: center; font-size: 12px; color: var(--ink-2); overflow: hidden; }
.thumb img { width: 100%; height: 100%; object-fit: cover; }
.thumb.alt { background: var(--tint-2); }
.prod-card { display: flex; flex-direction: column; gap: 12px; }
.prod-card .top { display: flex; gap: 12px; }
.prod-card .thumb { width: 88px; height: 88px; border-radius: 14px; flex-shrink: 0; }
.prod-card .actions { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 6px; }
.prod-list { display: grid; grid-template-columns: 1fr; gap: 10px; }
.pain { font-size: 13px; line-height: 1.5; background: #FBF5F4; border-radius: 10px; padding: 10px 12px; }
.claims { font-size: 12px; line-height: 1.6; }

/* 对标 */
.kv { display: grid; grid-template-columns: 84px minmax(0, 1fr); row-gap: 8px; column-gap: 10px; font-size: 13px; line-height: 1.5; }
.kv dt { color: var(--ink-2); }
.kv dd { margin: 0; }
details.bench > summary { list-style: none; cursor: pointer; }
details.bench > summary::-webkit-details-marker { display: none; }
details.bench[open] .chev { transform: rotate(180deg); }
.chev { transition: transform .2s; color: var(--ink-2); }

/* 文案 */
.script-grid { display: flex; flex-direction: column; gap: 16px; }
.seg { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 6px; }
.seg label { position: relative; }
.seg input { position: absolute; opacity: 0; }
.seg span { display: flex; align-items: center; justify-content: center; height: 40px; border-radius: 10px; border: 1px solid var(--line-strong);
  background: var(--card); font-size: 13px; cursor: pointer; }
.seg input:checked + span { background: var(--dark); border-color: var(--dark); color: #fff; font-weight: 600; }
.seg input:focus-visible + span { box-shadow: 0 0 0 3px var(--accent-soft); }
.variant-tabs { display: flex; gap: 8px; }
.variant-tabs button { padding: 8px 14px; border-radius: 999px; border: 1px solid var(--line); background: var(--card); color: var(--ink-2); font-size: 13px; cursor: pointer; }
.variant-tabs button.is-on { background: var(--dark); border-color: var(--dark); color: #fff; font-weight: 600; }
.sec-label { font-size: 12px; font-weight: 700; color: var(--accent); margin-bottom: 4px; }
.shots { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 6px; }
.shot { min-height: 62px; border-radius: 10px; background: #F7F1F0; display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 2px; font-size: 11px; color: var(--ink-2); text-align: center; padding: 6px; line-height: 1.35; }
.shot b { color: var(--ink); font-size: 12px; }
.empty { padding: 28px 16px; text-align: center; color: var(--ink-2); font-size: 14px; }
.spinner { width: 18px; height: 18px; border-radius: 50%; border: 2px solid rgba(255,255,255,.5); border-top-color: #fff; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* 素材 */
.asset-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.asset { position: relative; border-radius: 14px; overflow: hidden; background: var(--tint-3); aspect-ratio: 9 / 12; cursor: pointer; border: 2px solid transparent; }
.asset video, .asset img { width: 100%; height: 100%; object-fit: cover; }
.asset input { position: absolute; opacity: 0; }
.asset .tick { position: absolute; top: 8px; right: 8px; width: 24px; height: 24px; border-radius: 12px; border: 1.5px solid #fff;
  background: rgba(42,31,35,.25); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 12px; }
.asset .cap { position: absolute; left: 0; right: 0; bottom: 0; padding: 18px 10px 8px; font-size: 12px; font-weight: 600; color: #fff;
  background: linear-gradient(to top, rgba(42,31,35,.65), rgba(42,31,35,0)); }
.asset.is-on { border-color: var(--accent); }
.asset.is-on .tick { background: var(--accent); border-color: var(--accent); }
.asset input:focus-visible ~ .tick { box-shadow: 0 0 0 3px var(--accent-soft); }
.selbar { position: fixed; left: 0; right: 0; bottom: var(--tabbar-h); z-index: 39; background: var(--card); border-top: 1px solid var(--line);
  padding: 12px 16px; display: flex; align-items: center; gap: 12px; }

/* 课堂 */
.lesson { display: flex; align-items: center; gap: 10px; font-size: 14px; padding: 4px 0; color: var(--ink); }
.lesson .num { width: 24px; height: 24px; border-radius: 12px; border: 1.5px solid var(--line-strong); color: var(--ink-2);
  display: flex; align-items: center; justify-content: center; font-size: 12px; flex-shrink: 0; }
.lesson.is-done .num { background: var(--accent); border-color: var(--accent); color: #fff; }
.lesson.is-done .txt { color: var(--ink-2); }
.lesson.is-next .num { border-color: var(--accent); color: var(--accent); font-weight: 700; }
.lesson.is-next .txt { font-weight: 600; }
.progress { height: 6px; border-radius: 3px; background: #F5EEEC; overflow: hidden; }
.progress span { display: block; height: 100%; background: var(--accent); border-radius: 3px; }
.prose { font-size: 15px; line-height: 1.7; }
.prose p { margin: 0 0 12px; }
.prose ul, .prose ol { padding-left: 20px; margin: 0 0 12px; }
.prose h2, .prose h3 { margin: 16px 0 8px; font-size: 17px; }

/* AI 助手 */
.chat { display: flex; flex-direction: column; height: 100%; min-height: 0; }
.chat-head { display: flex; align-items: center; gap: 10px; padding: 14px 16px; background: var(--card); border-bottom: 1px solid var(--line); }
.chat-head .bot { width: 40px; height: 40px; border-radius: 20px; background: var(--accent); color: #fff; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.chat-body { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 12px; min-height: 0; }
.bubble { max-width: 86%; padding: 12px 14px; font-size: 14px; line-height: 1.6; white-space: pre-wrap; word-break: break-word; }
.bubble-ai { align-self: flex-start; background: var(--card); border: 1px solid var(--line); border-radius: 4px 18px 18px 18px; }
.bubble-user { align-self: flex-end; background: var(--accent); color: #fff; border-radius: 18px 4px 18px 18px; }
.bubble-staff { align-self: flex-start; background: #FFF8E7; border: 1px solid #F3E2B5; border-radius: 4px 18px 18px 18px; }
.bubble .who { font-size: 11px; font-weight: 700; color: var(--ink-2); margin-bottom: 4px; white-space: normal; }
.srcs { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; white-space: normal; }
.src { padding: 4px 8px; border-radius: 6px; background: #F5EEEC; font-size: 11px; color: var(--ink-2); }
.bubble-actions { display: flex; gap: 8px; margin-top: 10px; white-space: normal; }
.quickq { display: flex; flex-wrap: wrap; gap: 8px; }
.quickq button { padding: 8px 12px; border-radius: 999px; border: 1px solid #F3C6D8; background: var(--card); color: var(--accent-ink); font-size: 13px; cursor: pointer; }
.chat-input { display: flex; align-items: center; gap: 8px; padding: 12px 16px calc(12px + env(safe-area-inset-bottom)); background: var(--card); border-top: 1px solid var(--line); }
.chat-input .input { border-radius: 22px; background: #F5EEEC; border-color: transparent; }
.typing { align-self: flex-start; color: var(--ink-2); font-size: 13px; }
.assistant-page { position: fixed; inset: 0; z-index: 50; background: var(--ground); display: flex; flex-direction: column; }

/* 我的 */
.me-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
.me-row:last-child { border-bottom: none; }

/* 登录 / 注册 */
.auth-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 24px 16px; }
.auth-card { width: 100%; max-width: 420px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; }
.brand .mark { width: 36px; height: 36px; border-radius: 12px; background: var(--accent); color: #fff; display: flex; align-items: center; justify-content: center; }

/* =================== 平板 =================== */
@media (min-width: 640px) {
  .content { padding-left: 24px; padding-right: 24px; }
  .topbar { padding-left: 24px; padding-right: 24px; }
  .prod-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .asset-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .prod-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* =================== 电脑 =================== */
@media (min-width: 1024px) {
  :root { --tabbar-h: 0px; }
  .shell { display: flex; }
  .sidebar { display: flex; flex-direction: column; gap: 6px; position: sticky; top: 0; height: 100vh; width: 248px; flex-shrink: 0;
    padding: 24px 16px; background: var(--card); border-right: 1px solid var(--line); }
  .sidebar .brand { padding: 0 8px 18px; }
  .side-link { display: flex; align-items: center; gap: 12px; padding: 11px 12px; border-radius: 12px; color: var(--ink-2); font-weight: 600; font-size: 14px; }
  .side-link:hover { background: #FBF5F4; color: var(--ink); }
  .side-link.is-on { background: var(--accent-soft); color: var(--accent-ink); }
  .sidebar .spacer { flex: 1; }
  .main { flex: 1; }
  .tabbar { display: none; }
  .topbar { padding: 28px 40px 8px; max-width: 1280px; margin: 0 auto; }
  .content { padding: 12px 40px 64px; max-width: 1280px; }
  .ai-fab, .ai-fab.raised { bottom: 28px; right: 28px; }
  .selbar { left: 248px; bottom: 0; padding: 14px 40px; }
  .toast { bottom: 96px; }
  .home-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 20px; align-items: start; }
  .home-grid .col { display: flex; flex-direction: column; gap: 20px; }
  .script-grid { display: grid; grid-template-columns: 380px minmax(0, 1fr); gap: 20px; align-items: start; }
  .script-grid .sticky { position: sticky; top: 20px; }
  .prod-list { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .asset-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .bench-grid { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 16px; align-items: start; }
  .academy-grid { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: 20px; align-items: start; }
  .assistant-page { position: static; height: calc(100vh - 120px); border: 1px solid var(--line); border-radius: var(--r-card); overflow: hidden; max-width: 820px; margin: 0 auto; }
  .page-mobile-only { display: none; }
}
@media (max-width: 1023px) {
  .desktop-only { display: none !important; }
}

/* =================== 管理后台 =================== */
.admin .shell { display: block; }
.adm-top { position: sticky; top: 0; z-index: 30; background: var(--card); border-bottom: 1px solid var(--line); }
.adm-top .bar { display: flex; align-items: center; gap: 12px; padding: 12px 16px; }
.adm-nav { display: flex; gap: 4px; overflow-x: auto; padding: 0 12px 10px; scrollbar-width: none; }
.adm-nav::-webkit-scrollbar { display: none; }
.adm-link { display: flex; align-items: center; gap: 10px; padding: 9px 12px; border-radius: 10px; color: var(--ink-2);
  font-weight: 600; font-size: 14px; white-space: nowrap; }
.adm-link:hover { background: #FBF5F4; color: var(--ink); }
.adm-link.is-on { background: var(--accent-soft); color: var(--accent-ink); }
.adm-link .count { margin-left: auto; background: var(--accent); color: #fff; border-radius: 999px; font-size: 11px; padding: 1px 7px; }
.adm-side { display: none; }
.adm-main { padding: 20px 16px 60px; max-width: 1280px; margin: 0 auto; }
.adm-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 18px; }
.adm-head h1 { font-size: 22px; }
.table-wrap { overflow-x: auto; background: var(--card); border: 1px solid var(--line); border-radius: 16px; }
table.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th, .table td { padding: 11px 14px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
.table th { font-size: 12px; font-weight: 700; color: var(--ink-2); background: #FDFAF9; white-space: nowrap; }
.table tr:last-child td { border-bottom: none; }
.table td.num, .table th.num { text-align: right; white-space: nowrap; }
.table a { font-weight: 600; }
.stats { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.stat-card { padding: 14px 16px; }
.stat-card .v { font-size: 24px; font-weight: 700; }
.stat-card .k { font-size: 12px; color: var(--ink-2); }
.form-grid { display: grid; grid-template-columns: 1fr; gap: 14px; }
.form-grid .full { grid-column: 1 / -1; }
.hint { font-size: 12px; color: var(--ink-2); }
.check { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; min-height: 36px; }
.check input { width: 18px; height: 18px; accent-color: var(--accent); }
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 14px; }
.adm-asset-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.adm-asset { position: relative; border-radius: 12px; overflow: hidden; background: var(--tint-3); aspect-ratio: 3 / 4; border: 1px solid var(--line); }
.adm-asset video, .adm-asset img { width: 100%; height: 100%; object-fit: cover; }
.adm-asset .meta { position: absolute; left: 0; right: 0; bottom: 0; padding: 8px; background: rgba(255,255,255,.92); font-size: 12px; }
.adm-asset .sel { position: absolute; top: 8px; left: 8px; }
.adm-asset .sel input { width: 20px; height: 20px; accent-color: var(--accent); }
@media (min-width: 760px) {
  .stats { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .form-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .adm-asset-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
  .admin .shell { display: flex; }
  .adm-top { display: none; }
  .adm-side { display: flex; flex-direction: column; gap: 2px; position: sticky; top: 0; height: 100vh; overflow-y: auto; width: 240px;
    flex-shrink: 0; padding: 22px 12px; background: var(--card); border-right: 1px solid var(--line); }
  .adm-side .brand { padding: 0 10px 16px; }
  .adm-side .group { font-size: 11px; font-weight: 700; color: var(--ink-2); padding: 14px 12px 4px; text-transform: uppercase; letter-spacing: .04em; }
  .adm-main { flex: 1; padding: 28px 36px 60px; }
  .adm-asset-grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}