:root {
  color-scheme: light;
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-soft: #eef6ff;
  --text: #172033;
  --muted: #65728a;
  --line: #dde5ef;
  --accent: #4f8cff;
  --accent-dark: #2f68d8;
  --green: #3d9b78;
  --rose: #d76785;
  --shadow: 0 18px 50px rgba(23, 32, 51, 0.08);
  --radius: 8px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--text);
  background: linear-gradient(180deg, rgba(79, 140, 255, 0.08), transparent 320px), var(--bg);
}

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

button {
  cursor: pointer;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  width: 100%;
  min-height: 72px;
  background: rgba(248, 250, 252, 0.72);
  border-bottom: 1px solid rgba(221, 229, 239, 0.58);
  box-shadow: 0 12px 34px rgba(23, 32, 51, 0.06);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: min(1120px, calc(100% - 40px));
  min-height: 72px;
  margin: 0 auto;
  padding: 12px 0;
}

.brand,
.nav-links,
.hero-actions,
.post-meta,
.tag-filters,
.site-footer,
.card-bottom {
  display: flex;
  align-items: center;
}

.brand {
  gap: 12px;
  font-weight: 760;
}

.brand-avatar {
  width: 44px;
  height: 44px;
  border: 2px solid rgba(79, 140, 255, 0.35);
  border-radius: 50%;
  object-fit: cover;
}

.brand-text {
  white-space: nowrap;
}

.link-button {
  border: 0;
  padding: 0;
  color: inherit;
  background: transparent;
}

.nav-links {
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
}

.nav-links a,
.nav-links button {
  padding: 8px 0;
}

.nav-links a:hover,
.nav-links button:hover,
.nav-links .active {
  color: var(--accent-dark);
}

main {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 56px;
  align-items: center;
  min-height: calc(100vh - 96px);
  padding: 56px 0 72px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 760;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 22px;
  font-size: clamp(42px, 8vw, 82px);
  line-height: 1.02;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: 30px;
  line-height: 1.2;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 12px;
  font-size: 21px;
  line-height: 1.35;
}

.hero-lead {
  max-width: 660px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.85;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button,
.mini-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-weight: 700;
  color: var(--text);
  background: var(--surface);
}

.mini-button {
  min-height: 34px;
  padding: 0 12px;
  font-size: 13px;
}

.button.primary {
  border-color: var(--accent);
  color: #fff;
  background: var(--accent);
}

.button.ghost {
  color: var(--text);
  background: rgba(255, 255, 255, 0.72);
}

.button.danger,
.mini-button.danger {
  border-color: rgba(215, 103, 133, 0.46);
  color: #a83d59;
  background: #fff3f6;
}

.button.danger:hover,
.mini-button.danger:hover {
  border-color: #d76785;
  color: #8f2944;
}

.profile-panel {
  display: grid;
  gap: 18px;
  justify-items: center;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: var(--shadow);
  text-align: center;
}

.profile-avatar {
  width: 220px;
  height: 220px;
  border: 4px solid rgba(79, 140, 255, 0.24);
  border-radius: 50%;
  object-fit: cover;
}

.profile-name {
  margin-bottom: 4px;
  font-size: 22px;
  font-weight: 800;
}

.profile-line {
  margin: 0;
  color: var(--muted);
}

.ai-assistant {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 20px;
  align-items: stretch;
  padding: 20px;
  margin: 0;
  border: 1px solid rgba(79, 140, 255, 0.22);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.76);
  box-shadow: none;
}

.ai-companion-icon {
  position: relative;
  display: grid;
  place-items: center;
  align-self: start;
  width: 74px;
  height: 74px;
  border: 1px solid rgba(79, 140, 255, 0.34);
  border-radius: 22px;
  background: linear-gradient(180deg, #ffffff, #edf5ff);
}

.ai-companion-icon::before,
.ai-companion-icon::after {
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  content: "";
}

.ai-companion-icon::before {
  top: 11px;
  right: 12px;
}

.ai-companion-icon::after {
  left: 12px;
  bottom: 13px;
  background: var(--green);
}

.ai-companion-icon img {
  width: 54px;
  height: 54px;
  border: 2px solid rgba(79, 140, 255, 0.24);
  border-radius: 18px;
  object-fit: cover;
}

.ai-companion-icon span {
  position: absolute;
  right: -8px;
  bottom: -8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 30px;
  height: 24px;
  border: 1px solid rgba(79, 140, 255, 0.36);
  border-radius: 999px;
  color: var(--accent-dark);
  background: #fff;
  font-size: 11px;
  font-weight: 860;
}

.ai-panel-main {
  display: grid;
  gap: 18px;
}

.ai-copy {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
}

.ai-copy h3 {
  margin: 0;
  font-size: 24px;
}

.ai-copy .eyebrow {
  margin-bottom: 8px;
}

.ai-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.ai-pills span {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 11px;
  border: 1px solid rgba(79, 140, 255, 0.2);
  border-radius: 999px;
  margin: 0;
  color: var(--accent-dark);
  background: #fff;
  font-size: 12px;
  font-weight: 760;
}

.ai-chat-grid {
  display: grid;
  grid-template-columns: minmax(260px, 0.82fr) minmax(320px, 1fr);
  gap: 14px;
}

.ai-box {
  display: grid;
  gap: 12px;
  align-content: start;
  padding: 14px;
  border: 1px solid rgba(221, 229, 239, 0.9);
  border-radius: var(--radius);
  background: rgba(248, 250, 252, 0.7);
}

.ai-box textarea {
  min-height: 118px;
  resize: vertical;
}

.ai-box .button {
  justify-self: start;
  min-width: 104px;
}

.ai-output {
  display: grid;
  gap: 12px;
  min-height: 188px;
  padding: 14px;
  border: 1px solid rgba(221, 229, 239, 0.9);
  border-radius: var(--radius);
  background: var(--surface);
}

.ai-output-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--text);
  font-weight: 800;
}

.ai-output-head small {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.ai-output p {
  min-height: 70px;
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
  white-space: pre-line;
}

.ai-sources {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.ai-source,
.ai-empty-source {
  min-height: 38px;
  border: 1px solid rgba(79, 140, 255, 0.18);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.ai-source {
  display: grid;
  gap: 2px;
  padding: 8px 10px;
  color: var(--text);
  text-align: left;
}

.ai-source span {
  font-size: 13px;
  font-weight: 800;
}

.ai-source small,
.ai-empty-source {
  color: var(--muted);
  font-size: 12px;
}

.ai-empty-source {
  display: inline-flex;
  align-items: center;
  padding: 0 10px;
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.62;
}

.module-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 24px;
}

.module-heading h2 {
  margin-bottom: 0;
}

.rag-note {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.posts-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.posts-head .section-heading {
  margin-bottom: 0;
}

.posts-toolbar {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) auto;
  align-items: center;
  gap: 14px;
  margin-bottom: 26px;
}

.post-search,
.field {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.post-search {
  min-width: 0;
}

.search-label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

.search-box {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 54px;
  border: 1px solid rgba(221, 229, 239, 0.96);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.86);
  transition: border-color 160ms ease, background 160ms ease;
}

.search-box:focus-within {
  border-color: rgba(79, 140, 255, 0.52);
  background: #fff;
}

.search-box input {
  min-height: 52px;
  padding-left: 16px;
  padding-right: 46px;
}

.search-clear {
  position: absolute;
  right: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: 0;
  border-radius: 50%;
  color: var(--muted);
  background: transparent;
  font-size: 18px;
  line-height: 1;
}

.search-clear:hover,
.search-clear:focus-visible {
  color: var(--accent-dark);
  background: var(--surface-soft);
  outline: none;
}

.post-search input,
.field input,
.field textarea,
.field select {
  width: 100%;
  min-height: 42px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text);
  background: var(--surface);
  outline: none;
}

.post-search input {
  border: 0;
  border-radius: var(--radius);
  background: transparent;
}

.field textarea {
  min-height: 120px;
  padding: 12px;
  line-height: 1.6;
  resize: vertical;
}

.field .content-input {
  min-height: 320px;
  font-family: "Cascadia Code", "Fira Code", Consolas, "Microsoft YaHei", monospace;
}

.markdown-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.post-search input:focus,
.field input:focus,
.field textarea:focus,
.field select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 140, 255, 0.16);
}

.post-search input:focus {
  box-shadow: none;
}

.tag-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px;
  padding: 5px;
  border: 1px solid rgba(221, 229, 239, 0.9);
  border-radius: var(--radius);
  background: rgba(238, 246, 255, 0.58);
}

.tag {
  min-height: 42px;
  padding: 0 17px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: var(--muted);
  background: transparent;
  font-weight: 760;
}

.tag.active {
  border-color: rgba(79, 140, 255, 0.26);
  color: var(--accent-dark);
  background: #fff;
}

.post-count {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid rgba(79, 140, 255, 0.2);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.64);
  font-size: 13px;
  font-weight: 760;
  white-space: nowrap;
}

.section {
  padding: 70px 0;
  border-top: 1px solid var(--line);
}

.section-heading {
  max-width: 680px;
  margin-bottom: 26px;
}

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

.post-card,
.article,
.comment,
.editor-panel,
.draft-list,
.comments-panel,
.empty {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.post-card {
  min-height: 240px;
  padding: 22px;
  box-shadow: 0 12px 32px rgba(23, 32, 51, 0.05);
  cursor: pointer;
}

.post-card:hover {
  border-color: rgba(79, 140, 255, 0.42);
  transform: translateY(-2px);
  transition: transform 160ms ease, border-color 160ms ease;
}

.post-card:focus-visible {
  border-color: var(--accent);
  outline: 3px solid rgba(79, 140, 255, 0.18);
}

.card-title {
  border: 0;
  padding: 0;
  color: inherit;
  background: transparent;
  font-size: inherit;
  font-weight: 760;
  text-align: left;
}

.post-card p,
.article p,
.about p,
.comment p {
  color: var(--muted);
  line-height: 1.8;
}

.post-meta {
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 13px;
}

.post-meta span {
  color: var(--green);
  font-weight: 800;
}

.post-meta.single {
  justify-content: flex-start;
}

.card-bottom {
  justify-content: space-between;
  gap: 12px;
  margin-top: 22px;
  color: var(--muted);
  font-size: 13px;
}

.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.article-list {
  display: grid;
  gap: 18px;
}

.article {
  padding: 28px;
  border-left: 4px solid var(--accent);
}

.article-detail h1 {
  margin-top: 18px;
  font-size: clamp(36px, 6vw, 64px);
}

.article-body {
  margin: 28px 0;
}

.article-body blockquote {
  margin: 22px 0;
  padding: 18px 20px;
  border: 1px solid rgba(79, 140, 255, 0.18);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  color: var(--text);
  background: rgba(238, 246, 255, 0.62);
}

.article-body blockquote p {
  margin: 0 0 12px;
  color: var(--text);
}

.article-body blockquote p:last-child {
  margin-bottom: 0;
}

.article-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.article code {
  padding: 2px 6px;
  border-radius: 5px;
  color: var(--rose);
  background: #fff3f6;
  font-family: "Cascadia Code", "Fira Code", Consolas, monospace;
  font-size: 0.95em;
}

.article pre {
  overflow: auto;
  max-width: 100%;
  margin: 22px 0;
  padding: 18px;
  border-radius: var(--radius);
  color: #f8fafc;
  background: #172033;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.06);
  white-space: pre;
}

.article pre code {
  display: block;
  min-width: max-content;
  padding: 0;
  border-radius: 0;
  color: inherit;
  background: transparent;
  font-size: 14px;
  line-height: 1.75;
  tab-size: 4;
  white-space: pre;
}

.article-body strong {
  color: var(--text);
  font-weight: 800;
}

.article-body a {
  color: var(--accent-dark);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-body img {
  width: auto;
  max-width: min(100%, 820px);
  max-height: 70vh;
  margin: 20px auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 16px 42px rgba(23, 32, 51, 0.12);
  object-fit: contain;
}

.comments-panel,
.editor-panel,
.draft-list {
  padding: 24px;
}

.comments,
.comment-form,
.editor-form,
.draft-list,
.review-panel {
  display: grid;
  gap: 14px;
}

.comment {
  padding: 16px;
}

.draft-item-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: start;
}

.comment-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.comment strong {
  display: block;
  min-width: 0;
  margin-bottom: 8px;
}

.comment-delete {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 30px;
  padding: 0 10px;
  border: 1px solid transparent;
  border-radius: 999px;
  color: #a33e58;
  background: transparent;
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
}

.comment-delete:hover,
.comment-delete:focus-visible {
  border-color: rgba(215, 103, 133, 0.28);
  background: #fff3f6;
  outline: none;
}

.editor-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 18px;
  align-items: start;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.draft-item {
  display: grid;
  gap: 6px;
  width: 100%;
  min-height: 58px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text);
  background: var(--surface);
  text-align: left;
}

.draft-item span,
.status-line {
  color: var(--muted);
  font-size: 13px;
}

.status-line {
  min-height: 20px;
  margin: 0;
}

.review-panel {
  margin-top: 8px;
}

.review-panel h2 {
  margin: 8px 0 0;
  font-size: 18px;
}

.review-item {
  display: grid;
  gap: 8px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.72);
}

.review-item p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.review-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.review-status {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 10px;
  border: 1px solid rgba(79, 140, 255, 0.18);
  border-radius: var(--radius);
  color: var(--muted);
  background: var(--surface-soft);
  font-size: 13px;
  font-weight: 700;
}

.admin-modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(23, 32, 51, 0.34);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.admin-modal {
  position: relative;
  width: min(100%, 460px);
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.admin-modal .section-heading {
  margin-bottom: 18px;
}

.auth-copy {
  color: var(--muted);
  line-height: 1.75;
}

.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  background: var(--surface);
  font-size: 20px;
  line-height: 1;
}

.modal-close:hover,
.modal-close:focus-visible {
  color: var(--accent-dark);
  border-color: rgba(79, 140, 255, 0.32);
  outline: none;
}

.note-band {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.note-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.note-list li {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.7);
}

.about {
  display: grid;
  grid-template-columns: 240px minmax(0, 680px);
  gap: 32px;
}

.site-footer {
  justify-content: space-between;
  gap: 16px;
  width: min(1120px, calc(100% - 40px));
  min-height: 88px;
  margin: 0 auto;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.empty {
  padding: 24px;
  color: var(--muted);
}

@media (max-width: 860px) {
  .site-header {
    min-height: auto;
  }

  .hero,
  .editor-layout {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .ai-assistant {
    grid-template-columns: 74px minmax(0, 1fr);
    align-items: start;
  }

  .ai-panel-main {
    grid-column: 1 / -1;
  }

  .ai-copy {
    align-items: flex-start;
    flex-direction: column;
  }

  .ai-chat-grid {
    grid-template-columns: 1fr;
  }

  .hero,
  .editor-layout {
    min-height: auto;
    padding-top: 44px;
  }

  .profile-panel {
    grid-template-columns: 96px 1fr;
    justify-items: start;
    text-align: left;
  }

  .profile-avatar {
    width: 96px;
    height: 96px;
  }

  .module-heading,
  .note-band,
  .about,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .module-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .posts-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .posts-toolbar {
    display: grid;
    grid-template-columns: 1fr;
    align-items: stretch;
  }

  .post-search {
    min-width: 0;
  }

  .tag-filters {
    justify-content: flex-start;
  }

  .post-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .site-header-inner,
  main,
  .site-footer {
    width: min(100% - 28px, 1120px);
  }

  .site-header-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .nav-links {
    width: 100%;
    justify-content: space-between;
  }

  h1 {
    font-size: 42px;
  }

  .hero-lead {
    font-size: 16px;
  }

  .article,
  .post-card,
  .profile-panel,
  .ai-assistant,
  .editor-panel,
  .comments-panel,
  .draft-list {
    padding: 18px;
  }

  .ai-assistant {
    grid-template-columns: 1fr;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
  }
}