:root {
  --material-ink: #1d2926;
  --material-muted: #68736f;
  --material-soft: #8b9690;
  --material-line: #d8e0db;
  --material-paper: #f3f6f3;
  --material-surface: #ffffff;
  --material-side: #e8efea;
  --material-green: #235f50;
  --material-green-strong: #17483d;
  --material-green-soft: #e0ece5;
  --material-red: #bd583e;
  --material-red-soft: #faebe5;
  --material-shadow: 0 12px 26px rgba(29, 55, 45, 0.08);
}

* { box-sizing: border-box; }
html { min-width: 320px; background: var(--material-paper); }
body {
  min-width: 0;
  min-height: 100vh;
  margin: 0;
  background: var(--material-paper);
  color: var(--material-ink);
  font-family: "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif;
}
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
button, a, input, select { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible {
  outline: 3px solid rgba(35, 95, 80, 0.25);
  outline-offset: 2px;
}

.material-header {
  min-height: 72px;
  padding: 0 4vw;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--material-line);
  background: #f8faf8;
  position: sticky;
  top: 0;
  z-index: 5;
}
.material-brand { display: inline-flex; align-items: center; gap: 10px; min-width: 0; }
.material-brand > span:last-child { display: grid; gap: 2px; min-width: 0; }
.material-brand strong { color: var(--material-ink); font-size: 15px; font-weight: 820; white-space: nowrap; }
.material-brand small { color: var(--material-soft); font-size: 10px; font-weight: 800; letter-spacing: .08em; }
.material-mark {
  width: 31px;
  height: 31px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 7px;
  background: var(--material-green);
  color: #fff;
  font-size: 15px;
  font-weight: 800;
}
.material-header-actions { display: flex; align-items: center; justify-content: flex-end; gap: 12px; min-width: 0; }
.material-session { max-width: 20vw; overflow: hidden; color: var(--material-muted); font-size: 12px; font-weight: 700; text-overflow: ellipsis; white-space: nowrap; }
.material-header .account-slot { display: inline-flex; min-width: 0; }
.material-header .account-slot:empty { display: none; }
.material-header .account-link { color: var(--material-green); font-size: 12px; font-weight: 780; }
.material-header .account-link:hover { color: var(--material-red); }

.material-main { width: 92vw; max-width: 1880px; margin: 0 auto; padding: 44px 0 72px; }
.material-intro { display: flex; align-items: end; justify-content: space-between; gap: 28px; padding-bottom: 26px; border-bottom: 1px solid var(--material-line); }
.material-kicker { margin: 0 0 9px; color: var(--material-green); font-size: 10px; font-weight: 850; letter-spacing: .1em; }
.material-intro h1 { margin: 0; color: var(--material-ink); font-size: 34px; font-weight: 820; line-height: 1.2; }
.material-description { margin: 10px 0 0; color: var(--material-muted); font-size: 14px; line-height: 1.6; }
.material-count { min-width: 130px; padding-left: 20px; border-left: 1px solid var(--material-line); text-align: right; }
.material-count strong { display: block; color: var(--material-green); font-size: 28px; font-weight: 820; font-variant-numeric: tabular-nums; }
.material-count span { color: var(--material-soft); font-size: 11px; }

.material-toolbar { display: grid; grid-template-columns: minmax(220px, 1fr) minmax(0, 2.25fr) auto; align-items: center; gap: 14px; padding: 20px 0 22px; }
.material-search input {
  width: 100%;
  min-height: 40px;
  padding: 0 13px;
  border: 1px solid var(--material-line);
  border-radius: 6px;
  background: var(--material-surface);
  color: var(--material-ink);
  font-size: 13px;
}
.material-search input::placeholder { color: #9ba59f; }
.material-category { display: flex; flex-wrap: wrap; gap: 6px; }
.material-category button {
  min-height: 34px;
  padding: 0 11px;
  border: 1px solid var(--material-line);
  border-radius: 5px;
  background: #f9fbf9;
  color: var(--material-muted);
  font-size: 12px;
  font-weight: 740;
  transition: color 160ms ease, background-color 160ms ease, border-color 160ms ease, transform 160ms ease;
}
.material-category button:hover { border-color: #a9bdb2; color: var(--material-green); transform: translateY(-1px); }
.material-category button.is-active { border-color: var(--material-green); background: var(--material-green); color: #fff; }
.material-sort { display: inline-flex; align-items: center; gap: 8px; color: var(--material-soft); font-size: 12px; font-weight: 750; white-space: nowrap; }
.material-sort select {
  min-height: 36px;
  padding: 0 30px 0 10px;
  border: 1px solid var(--material-line);
  border-radius: 5px;
  outline: none;
  background-color: var(--material-surface);
  color: var(--material-ink);
  font-size: 12px;
  font-weight: 700;
}
.material-sort select:focus-visible { outline: 3px solid rgba(35, 95, 80, .25); outline-offset: 2px; }

.material-status { min-height: 100px; display: grid; place-items: center; border-top: 1px solid var(--material-line); border-bottom: 1px solid var(--material-line); color: var(--material-muted); font-size: 13px; }
.material-status-hidden { display: none; }
.material-status.is-error { color: var(--material-red); }
.material-status.is-empty { color: var(--material-muted); }
.material-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(218px, 1fr)); gap: 16px; padding-top: 18px; }
.material-card { min-width: 0; overflow: hidden; border: 1px solid var(--material-line); border-radius: 7px; background: var(--material-surface); box-shadow: none; animation: material-card-enter 260ms ease both; transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease; }
.material-card:hover { border-color: #a9bdb2; box-shadow: var(--material-shadow); transform: translateY(-2px); }
.material-card-media { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: var(--material-side); }
.material-card-media img { width: 100%; height: 100%; display: block; object-fit: cover; transition: transform 240ms ease; }
.material-card-media img.is-loading,
.material-detail-image-wrap img.is-loading { visibility: hidden; }
.material-card:hover .material-card-media img { transform: scale(1.025); }
.material-card-media .material-image-error { position: absolute; inset: 0; display: grid; place-items: center; color: var(--material-soft); font-size: 12px; }
.material-card-media .material-image-error[hidden],
.material-card-media img[hidden],
.material-detail-image-wrap .material-image-error[hidden],
.material-detail-image-wrap img[hidden] { display: none; }
.material-card-meta { display: grid; gap: 7px; padding: 13px 13px 12px; }
.material-card-topline { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.material-tag { max-width: 100%; padding: 4px 7px; border-radius: 4px; background: var(--material-green-soft); color: var(--material-green-strong); font-size: 10px; font-weight: 800; white-space: nowrap; }
.material-card-mode { overflow: hidden; color: var(--material-soft); font-size: 10px; text-overflow: ellipsis; white-space: nowrap; }
.material-card-title { min-height: 36px; margin: 0; overflow: hidden; color: var(--material-ink); font-size: 13px; font-weight: 800; line-height: 1.4; display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; }
.material-card-time { color: var(--material-soft); font-size: 11px; font-variant-numeric: tabular-nums; }
.material-card-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; margin-top: 2px; }
.material-button { min-height: 34px; display: inline-flex; align-items: center; justify-content: center; padding: 0 10px; border: 1px solid var(--material-line); border-radius: 5px; background: var(--material-surface); color: var(--material-green); font-size: 12px; font-weight: 800; text-decoration: none; transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease, transform 160ms ease; }
.material-button:hover { border-color: #9fb8aa; background: var(--material-green-soft); color: var(--material-green-strong); transform: translateY(-1px); }
.material-button-quiet { min-height: 34px; background: transparent; }
.material-button-primary { border-color: var(--material-green); background: var(--material-green); color: #fff; }
.material-button-primary:hover { border-color: var(--material-green-strong); background: var(--material-green-strong); color: #fff; }
.material-pagination { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 6px; padding-top: 28px; }
.material-pagination button { min-width: 34px; min-height: 34px; padding: 0 9px; border: 1px solid var(--material-line); border-radius: 5px; background: var(--material-surface); color: var(--material-muted); font-size: 12px; font-weight: 780; }
.material-pagination button:hover, .material-pagination button.is-active { border-color: var(--material-green); color: var(--material-green); }
.material-pagination button.is-active { background: var(--material-green-soft); }
.material-pagination button:disabled { cursor: not-allowed; opacity: .45; }
.material-pagination span { padding: 0 3px; color: var(--material-soft); font-size: 12px; }

.material-dialog { width: min(720px, calc(100vw - 28px)); max-height: calc(100vh - 28px); padding: 0; border: 1px solid var(--material-line); border-radius: 8px; background: var(--material-paper); color: var(--material-ink); box-shadow: 0 24px 70px rgba(25, 46, 38, .2); }
.material-dialog::backdrop { background: rgba(22, 39, 33, .34); }
.material-dialog-header { display: flex; align-items: start; justify-content: space-between; gap: 20px; padding: 22px 24px 18px; border-bottom: 1px solid var(--material-line); }
.material-dialog h2 { margin: 0; max-width: 560px; font-size: 22px; font-weight: 820; line-height: 1.35; }
.material-icon-button { min-height: 32px; padding: 0 9px; border: 1px solid var(--material-line); border-radius: 5px; background: var(--material-surface); color: var(--material-muted); font-size: 12px; font-weight: 780; }
.material-dialog-content { display: grid; gap: 18px; padding: 20px 24px 24px; overflow: auto; }
.material-detail-image-wrap { position: relative; min-height: 220px; display: grid; place-items: center; overflow: hidden; border: 1px solid var(--material-line); border-radius: 6px; background: var(--material-side); }
.material-detail-image-wrap img { width: 100%; max-height: 50vh; display: block; object-fit: contain; }
.material-detail-image-wrap .material-image-error { color: var(--material-soft); font-size: 12px; }
.material-detail-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px 20px; margin: 0; }
.material-detail-list div { min-width: 0; }
.material-detail-list dt, .material-detail-prompt > span { margin-bottom: 5px; color: var(--material-soft); font-size: 11px; font-weight: 800; }
.material-detail-list dd { margin: 0; overflow-wrap: anywhere; color: var(--material-ink); font-size: 12px; line-height: 1.5; }
.material-detail-prompt { padding-top: 14px; border-top: 1px solid var(--material-line); }
.material-detail-prompt > span { display: block; }
.material-detail-prompt p { max-height: 170px; margin: 0; overflow: auto; color: var(--material-muted); font-size: 12px; line-height: 1.7; white-space: pre-wrap; }
.material-detail-download { width: 100%; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

@keyframes material-card-enter { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }
@media (max-width: 1100px) { .material-toolbar { grid-template-columns: minmax(220px, .8fr) minmax(0, 1.7fr); }.material-sort { grid-column: 2; justify-self: end; } }
@media (max-width: 700px) {
  .material-header { min-height: 64px; padding: 0 16px; gap: 12px; }
  .material-brand small { display: none; }
  .material-header-actions { gap: 8px; }
  .material-session { display: none; }
  .material-main { width: calc(100% - 32px); padding: 30px 0 50px; }
  .material-intro { align-items: start; }
  .material-intro h1 { font-size: 29px; }
  .material-description { font-size: 13px; }
  .material-count { min-width: 90px; padding-left: 12px; }
  .material-count strong { font-size: 23px; }
  .material-toolbar { grid-template-columns: 1fr; gap: 12px; padding-top: 16px; }
  .material-sort { grid-column: auto; justify-self: start; }
  .material-category { overflow-x: auto; flex-wrap: nowrap; padding-bottom: 2px; }
  .material-category button { flex: 0 0 auto; }
  .material-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; padding-top: 14px; }
  .material-card-meta { padding: 10px; }
  .material-card-actions { grid-template-columns: 1fr; }
  .material-card-mode { display: none; }
  .material-dialog-header, .material-dialog-content { padding-left: 16px; padding-right: 16px; }
  .material-detail-list { grid-template-columns: 1fr; gap: 10px; }
}
@media (max-width: 390px) { .material-grid { grid-template-columns: 1fr; }.material-card-actions { grid-template-columns: 1fr 1fr; }.material-brand strong { font-size: 13px; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; } }