:root {
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-serif: "Noto Serif SC", "Songti SC", Georgia, serif;
  --font-display: "Outfit", var(--font-sans);
  --color-canvas: #f7f8f9;
  --color-surface: #ffffff;
  --color-surface-subtle: #eef2f6;
  --color-text: #17202a;
  --color-muted: #66717f;
  --color-faint: #8a95a3;
  --color-border: #d8dee6;
  --color-border-strong: #b9c2ce;
  --color-primary: #2563eb;
  --color-primary-strong: #1d4ed8;
  --color-success: #16875a;
  --color-warning: #a16207;
  --color-danger: #b42318;
  --shadow-soft: 0 10px 30px rgba(23, 32, 42, 0.07);
  --radius-sm: 6px;
  --radius: 8px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --shell: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--color-canvas);
  color: var(--color-text);
  font-family: var(--font-sans);
  line-height: 1.6;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--color-canvas);
}

body.nav-open {
  overflow: hidden;
}

img,
svg,
video {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  color: var(--color-primary);
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.shell {
  width: min(var(--shell), calc(100% - 32px));
  margin-inline: auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 68px;
  padding: 0 max(16px, calc((100vw - var(--shell)) / 2));
  border-bottom: 1px solid rgba(216, 222, 230, 0.86);
  background: rgba(247, 248, 249, 0.94);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: 0;
}

.brand img {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav a,
.nav-toggle {
  min-height: 36px;
  padding: 7px 11px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--color-muted);
  background: transparent;
  font-size: 14px;
  font-weight: 600;
}

.nav a:hover,
.nav-toggle:hover {
  border-color: var(--color-border);
  color: var(--color-text);
  background: var(--color-surface);
}

.nav-toggle {
  display: none;
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-top: var(--space-7);
  padding: var(--space-5) 0 var(--space-6);
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  font-size: 14px;
}

.footer p {
  margin: 0;
  color: var(--color-text);
  font-weight: 700;
}

.message-stack {
  display: grid;
  gap: var(--space-3);
  padding-top: var(--space-4);
}

.message {
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: var(--shadow-soft);
}

.message--success {
  border-left-color: var(--color-success);
}

.message--warning {
  border-left-color: var(--color-warning);
}

.message--error {
  border-left-color: var(--color-danger);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: var(--space-6);
  align-items: end;
  padding: clamp(44px, 8vw, 92px) 0 var(--space-7);
}

.hero h1,
.page-head h1,
.reading-head h1 {
  margin: 0;
  color: var(--color-text);
  font-family: var(--font-serif);
  font-size: clamp(38px, 7vw, 76px);
  line-height: 1.02;
  letter-spacing: 0;
}

.page-head {
  padding: var(--space-7) 0 var(--space-5);
}

.page-head p {
  max-width: 680px;
  margin: var(--space-3) 0 0;
  color: var(--color-muted);
}

.eyebrow {
  margin: 0 0 var(--space-2);
  color: var(--color-primary);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.lead {
  max-width: 720px;
  margin: var(--space-4) 0 0;
  color: #465160;
  font-size: clamp(17px, 2vw, 21px);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 8px 14px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  font-weight: 700;
  text-align: center;
}

.button:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.button.primary,
.button--primary {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: #ffffff;
}

.button.primary:hover,
.button--primary:hover {
  border-color: var(--color-primary-strong);
  background: var(--color-primary-strong);
  color: #ffffff;
}

.panel {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  box-shadow: var(--shadow-soft);
}

.stats {
  display: grid;
  gap: 1px;
  overflow: hidden;
  padding: 0;
  background: var(--color-border);
}

.stats span {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 16px 18px;
  background: var(--color-surface);
  color: var(--color-muted);
}

.stats strong {
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: 28px;
  line-height: 1;
}

.section {
  padding: var(--space-6) 0;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.section-head h1,
.section-head h2,
.panel h2 {
  margin: 0;
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.2;
  letter-spacing: 0;
}

.section-head > a {
  color: var(--color-primary);
  font-weight: 700;
}

.feature-grid,
.entry-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

.entry-card {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  min-height: 190px;
  overflow: hidden;
}

.entry-card img {
  width: 100%;
  height: 100%;
  min-height: 190px;
  object-fit: cover;
  background: var(--color-surface-subtle);
}

.entry-card > div {
  display: grid;
  align-content: start;
  gap: var(--space-2);
  padding: var(--space-4);
}

.entry-card h2,
.entry-card h3,
.mini-card a {
  margin: 0;
  font-size: 20px;
  line-height: 1.3;
}

.entry-card p {
  margin: 0;
  color: var(--color-muted);
}

.meta,
.muted,
small {
  color: var(--color-muted);
  font-size: 13px;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: var(--space-6);
}

.list {
  display: grid;
  border-top: 1px solid var(--color-border);
}

.list-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-4);
  align-items: center;
  min-height: 54px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}

.list-row span {
  overflow-wrap: anywhere;
  font-weight: 700;
}

.tag-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
}

.tag-card,
.chip {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
}

.tag-card {
  display: grid;
  gap: var(--space-2);
  padding: 14px;
}

.tag-card span {
  color: var(--color-muted);
  font-size: 13px;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.chip {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 5px 10px;
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 700;
}

.asset-strip {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: var(--space-2);
}

.asset-strip a,
.asset-card {
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
}

.asset-strip img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.asset-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-4);
}

.asset-card {
  display: grid;
  color: var(--color-text);
}

.asset-card img,
.file-block {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: var(--color-surface-subtle);
}

.asset-card span:not(.file-block) {
  min-height: 44px;
  padding: 10px 12px;
  overflow-wrap: anywhere;
  color: var(--color-muted);
  font-size: 13px;
}

.file-block {
  display: grid;
  place-items: center;
  color: var(--color-muted);
  font-family: var(--font-display);
  font-weight: 800;
}

.empty {
  padding: var(--space-5);
  color: var(--color-muted);
}

.reading {
  max-width: 800px;
  padding-top: var(--space-7);
}

.reading-head {
  display: grid;
  gap: var(--space-3);
}

.reading-head h1 {
  font-size: clamp(34px, 5vw, 58px);
}

.backlink {
  color: var(--color-primary);
  font-weight: 700;
}

.hero-image {
  margin: var(--space-6) 0;
}

.hero-image img {
  width: 100%;
  max-height: 520px;
  border-radius: var(--radius);
  object-fit: cover;
}

.reading-body {
  color: #22303c;
  font-size: 18px;
  line-height: 1.86;
}

.reading-body :where(h2, h3, h4) {
  margin: 2em 0 0.6em;
  line-height: 1.25;
  letter-spacing: 0;
}

.reading-body p,
.reading-body ul,
.reading-body ol,
.reading-body blockquote,
.reading-body figure {
  margin: 0 0 1.15em;
}

.reading-body img {
  width: auto;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
}

.reading-body a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.entry-grid--small {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.mini-card {
  display: grid;
  gap: var(--space-2);
  min-height: 110px;
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
}

.search-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.search-form input,
.form input:not([type="checkbox"]):not([type="radio"]),
.form select,
.form textarea,
.studio-login input {
  width: 100%;
  min-height: 42px;
  padding: 9px 11px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: #ffffff;
  color: var(--color-text);
}

.form textarea {
  resize: vertical;
}

.search-form input:focus,
.form input:focus,
.form select:focus,
.form textarea:focus,
.studio-login input:focus {
  outline: 3px solid rgba(37, 99, 235, 0.16);
  border-color: var(--color-primary);
}

.studio-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: var(--space-6);
  padding: var(--space-6) 0;
  align-items: start;
}

.studio-nav {
  position: sticky;
  top: 88px;
  display: grid;
  gap: var(--space-1);
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
}

.studio-nav a {
  padding: 9px 10px;
  border-radius: var(--radius-sm);
  color: var(--color-muted);
  font-weight: 700;
}

.studio-nav a:hover {
  background: var(--color-surface-subtle);
  color: var(--color-text);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.metric {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-4);
}

.metric strong {
  font-family: var(--font-display);
  font-size: 32px;
  line-height: 1;
}

.metric span {
  color: var(--color-muted);
}

.panel:not(.entry-card):not(.asset-card):not(.metric):not(.stats):not(.table) {
  padding: var(--space-5);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

.form label {
  display: grid;
  gap: var(--space-2);
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 700;
}

.form .span-2 {
  grid-column: 1 / -1;
}

.form .check {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 42px;
}

.choice-box {
  max-height: 220px;
  overflow: auto;
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #ffffff;
}

.choice-box ul {
  display: grid;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
}

.table th,
.table td {
  padding: 12px;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

.table th {
  color: var(--color-muted);
  font-size: 12px;
  text-transform: uppercase;
}

.table tr:last-child td {
  border-bottom: 0;
}

.table.panel {
  padding: 0;
}

.table-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-4);
  align-items: center;
  min-height: 58px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
}

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

.table-row > span:first-child {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.table-row strong {
  overflow-wrap: anywhere;
}

.table-row:hover {
  background: #f9fbfd;
  color: var(--color-text);
}

.status {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--color-surface-subtle);
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 800;
}

.status--publish {
  background: rgba(22, 135, 90, 0.12);
  color: var(--color-success);
}

.status--draft {
  background: rgba(161, 98, 7, 0.12);
  color: var(--color-warning);
}

.status--private {
  background: rgba(180, 35, 24, 0.1);
  color: var(--color-danger);
}

.studio-assets {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.centered {
  display: grid;
  place-items: center;
  min-height: calc(100vh - 180px);
  padding-block: var(--space-7);
}

.narrow {
  width: min(100%, 440px);
}

.centered .form {
  display: grid;
  gap: var(--space-4);
}

.centered h1 {
  margin: 0 0 var(--space-5);
  font-size: 30px;
  line-height: 1.2;
}

.studio-login {
  display: grid;
  place-items: center;
  min-height: calc(100vh - 160px);
}

.login-panel {
  width: min(100%, 420px);
  padding: var(--space-6);
}

.login-panel form {
  display: grid;
  gap: var(--space-4);
}

.login-panel label {
  display: grid;
  gap: var(--space-2);
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 700;
}

.errorlist {
  margin: 0 0 var(--space-3);
  padding: 0;
  color: var(--color-danger);
  list-style: none;
}

pre {
  overflow: auto;
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #f2f5f8;
  color: var(--color-text);
}

@media (max-width: 920px) {
  .hero,
  .split,
  .studio-layout {
    grid-template-columns: 1fr;
  }

  .studio-nav {
    position: static;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .feature-grid,
  .entry-grid,
  .metric-grid,
  .asset-grid,
  .studio-assets {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .entry-grid--small {
    grid-template-columns: 1fr;
  }

  .asset-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .shell {
    width: min(100% - 24px, var(--shell));
  }

  .topbar {
    min-height: 60px;
    padding-inline: 12px;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
  }

  .nav {
    position: fixed;
    inset: 60px 12px auto;
    display: none;
    grid-template-columns: 1fr;
    gap: var(--space-1);
    padding: var(--space-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    box-shadow: var(--shadow-soft);
  }

  body.nav-open .nav {
    display: grid;
  }

  .nav a {
    min-height: 44px;
  }

  .hero {
    padding-top: var(--space-6);
  }

  .feature-grid,
  .entry-grid,
  .metric-grid,
  .asset-grid,
  .studio-assets,
  .tag-grid,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .entry-card {
    grid-template-columns: 1fr;
  }

  .entry-card img {
    aspect-ratio: 16 / 9;
    min-height: auto;
  }

  .asset-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .list-row,
  .table-row,
  .search-form {
    grid-template-columns: 1fr;
  }

  .section-head,
  .footer {
    align-items: start;
    flex-direction: column;
  }

  .reading {
    padding-top: var(--space-6);
  }

  .reading-body {
    font-size: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}