:root {
  --bg: #f5f7fb;
  --panel: rgba(255, 255, 255, 0.84);
  --panel-solid: #ffffff;
  --panel-muted: #eef2f8;
  --text: #101826;
  --text-soft: #5f6b7b;
  --line: rgba(16, 24, 38, 0.08);
  --line-strong: rgba(16, 24, 38, 0.14);
  --accent: #1d5cff;
  --accent-soft: #dce7ff;
  --success: #0f9d58;
  --danger: #d14a4a;
  --shadow: 0 24px 70px rgba(18, 31, 53, 0.12);
  --radius: 28px;
  --radius-sm: 18px;
  --content-width: 1200px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Avenir Next", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(151, 197, 255, 0.45), transparent 28%),
    radial-gradient(circle at top right, rgba(144, 238, 220, 0.28), transparent 24%),
    linear-gradient(180deg, #eef3fb 0%, #f8fbff 36%, #f2f4f9 100%);
}

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

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

button,
input {
  font: inherit;
}

button {
  border: none;
  cursor: pointer;
  background: none;
}

.site-shell {
  width: min(calc(100% - 40px), var(--content-width));
  margin: 0 auto;
  padding-bottom: 40px;
}

.narrow-shell {
  max-width: 960px;
}

.article-shell {
  max-width: 1080px;
}

.topbar {
  position: sticky;
  top: 18px;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 24px;
  margin-top: 20px;
  border: 1px solid rgba(255, 255, 255, 0.65);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(22px);
  box-shadow: 0 14px 35px rgba(40, 56, 79, 0.1);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  flex-shrink: 0;
}

.brand-mark {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: linear-gradient(135deg, #0e1728 0%, #1d5cff 100%);
  box-shadow: 0 0 0 6px rgba(29, 92, 255, 0.11);
}

.topbar-right,
.nav,
.nav-actions,
.hero-actions,
.toolbar,
.filter-row,
.meta-row,
.footer,
.article-meta,
.user-actions {
  display: flex;
  align-items: center;
}

.topbar-right {
  gap: 18px;
  justify-content: flex-end;
  flex: 1;
}

.nav {
  gap: 24px;
  color: var(--text-soft);
  font-size: 0.95rem;
  flex-wrap: wrap;
}

.nav a,
.nav-link {
  transition: color 180ms ease;
}

.nav a:hover,
.nav-link:hover,
.nav a:focus-visible,
.nav-link:focus-visible {
  color: var(--text);
}

.nav-actions {
  gap: 10px;
  flex-wrap: wrap;
}

.nav-link,
.nav-button,
.nav-cta {
  min-height: 40px;
  padding: 0 16px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.nav-link,
.nav-button {
  color: var(--text-soft);
  background: rgba(255, 255, 255, 0.74);
}

.nav-cta {
  background: linear-gradient(135deg, #0f1420 0%, #1d5cff 100%);
  color: #ffffff;
  box-shadow: 0 16px 30px rgba(29, 92, 255, 0.22);
}

.inline-form {
  display: inline-flex;
}

.flash {
  margin-top: 18px;
  padding: 16px 20px;
  border-radius: 20px;
  border: 1px solid transparent;
  box-shadow: 0 18px 40px rgba(18, 31, 53, 0.08);
}

.flash-success {
  background: rgba(15, 157, 88, 0.11);
  border-color: rgba(15, 157, 88, 0.2);
  color: #0f6b40;
}

.flash-error {
  background: rgba(209, 74, 74, 0.1);
  border-color: rgba(209, 74, 74, 0.16);
  color: #9a2e2e;
}

.hero {
  display: flex;
  justify-content: center;
  padding: 72px 0 42px;
}

.hero-copy,
.hero-media,
.feature-card,
.note-card,
.about-card,
.article-hero,
.article-body,
.article-card,
.auth-feature,
.auth-card,
.account-card,
.stat-card,
.admin-panel,
.user-row,
.empty-page {
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: var(--shadow);
  animation: float-up 720ms ease both;
}

.hero-copy {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  padding: 36px 48px;
  border-radius: calc(var(--radius) + 8px);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.94), rgba(244, 249, 255, 0.85)),
    linear-gradient(180deg, rgba(29, 92, 255, 0.05), rgba(0, 0, 0, 0));
  width: 100%;
  flex-wrap: wrap;
}

.hero-content {
  flex: 1;
  min-width: 300px;
}

.hero-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 20px;
  flex-shrink: 0;
}

.eyebrow,
.mini-label {
  margin: 0;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 12px 0 0;
  font-size: clamp(1.6rem, 3vw, 2.8rem);
  line-height: 1.15;
}

.section h2,
.about-card h2,
.auth-shell h1,
.empty-page h1 {
  margin: 18px 0 0;
  font-size: clamp(2.8rem, 5vw, 5.2rem);
  line-height: 1.02;
}

.hero-text,
.section-text,
.feature-card p,
.note-card p,
.about-copy p,
.article-body p,
.article-body li,
.auth-card p,
.auth-feature span,
.account-card p,
.empty-page p {
  color: var(--text-soft);
  line-height: 1.8;
  font-size: 1rem;
}

.hero-text {
  margin: 24px 0 0;
  max-width: 48ch;
  font-size: 1.06rem;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 138px;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 700;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    background 180ms ease,
    opacity 180ms ease;
}

.button:hover,
.button:focus-visible,
.article-card:hover,
.article-card:focus-within {
  transform: translateY(-2px);
}

.button[disabled] {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.button.primary {
  background: linear-gradient(135deg, #0f1420 0%, #1d5cff 100%);
  color: #ffffff;
  box-shadow: 0 16px 30px rgba(29, 92, 255, 0.28);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(16, 24, 38, 0.08);
  color: var(--text);
}

.button.danger {
  background: rgba(209, 74, 74, 0.1);
  color: #9a2e2e;
  border: 1px solid rgba(209, 74, 74, 0.14);
}

.button.small {
  min-width: auto;
  min-height: 40px;
  padding: 0 16px;
  font-size: 0.92rem;
}

.full-width {
  width: 100%;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 42px;
}

.hero-stats article {
  padding: 18px 20px;
  border-radius: 22px;
  background: rgba(246, 249, 255, 0.88);
  border: 1px solid rgba(17, 24, 39, 0.06);
}

.hero-stats strong {
  display: block;
  font-size: 1.35rem;
}

.hero-stats span,
.hero-panel span,
.about-meta span,
.article-meta span,
.meta-row span,
.stat-card span,
.account-meta-list span,
.user-title span,
.user-info span {
  color: var(--text-soft);
}

.hero-media {
  position: relative;
  overflow: hidden;
  border-radius: calc(var(--radius) + 12px);
  min-height: 680px;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.glass {
  background: rgba(255, 255, 255, 0.68);
  backdrop-filter: blur(22px);
}

.hero-panel {
  position: absolute;
  left: 28px;
  right: 28px;
  bottom: 28px;
  padding: 22px 24px;
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.75);
}

.hero-panel p,
.article-meta,
.back-link,
.article-card .meta-row,
.footer,
.toolbar span,
.search-box span,
.field span,
.switch-text,
.user-info {
  margin: 0;
  font-size: 0.92rem;
}

.hero-panel strong {
  display: block;
  margin: 8px 0 6px;
  font-size: 1.1rem;
}

.feature-strip,
.note-grid,
.article-grid,
.stats-grid,
.account-grid {
  display: grid;
  gap: 20px;
}

.feature-strip {
  grid-template-columns: 1.3fr 0.7fr;
  margin-bottom: 30px;
}

.feature-card {
  padding: 34px;
  border-radius: var(--radius);
  background: var(--panel);
}

.feature-card h2 {
  margin: 12px 0 16px;
  font-size: clamp(2rem, 3vw, 3rem);
  line-height: 1.08;
}

.feature-card.muted {
  background:
    linear-gradient(180deg, rgba(217, 235, 255, 0.7), rgba(255, 255, 255, 0.92)),
    #ffffff;
}

.feature-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  color: var(--text);
  line-height: 1.9;
  font-weight: 600;
}

.section {
  padding: 30px 0 0;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 26px;
}

.section-head.compact {
  margin-bottom: 18px;
}

.section h2 {
  font-size: clamp(2rem, 3vw, 3.2rem);
}

.section-text {
  max-width: 42ch;
}

.toolbar {
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 22px;
}

.search-box {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: min(100%, 420px);
}

.search-box input,
.field input {
  width: 100%;
  min-height: 52px;
  padding: 0 18px;
  border: 1px solid rgba(16, 24, 38, 0.08);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.82);
  color: var(--text);
  outline: none;
  box-shadow: 0 8px 30px rgba(18, 31, 53, 0.04);
}

.search-box input:focus,
.field input:focus {
  border-color: rgba(29, 92, 255, 0.3);
  box-shadow: 0 0 0 4px rgba(29, 92, 255, 0.08);
}

.filter-row {
  flex-wrap: wrap;
  gap: 10px;
}

.filter-chip,
.chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(16, 24, 38, 0.08);
  color: var(--text-soft);
  font-size: 0.92rem;
  transition:
    border-color 180ms ease,
    background 180ms ease,
    color 180ms ease;
}

.chip-accent {
  background: rgba(29, 92, 255, 0.1);
  color: var(--accent);
  border-color: rgba(29, 92, 255, 0.18);
}

.chip-muted {
  background: rgba(209, 74, 74, 0.08);
  color: #9a2e2e;
  border-color: rgba(209, 74, 74, 0.12);
}

.filter-chip:hover,
.filter-chip:focus-visible {
  border-color: rgba(29, 92, 255, 0.24);
  color: var(--text);
}

.filter-chip.active {
  background: linear-gradient(135deg, #0f1420 0%, #1d5cff 100%);
  border-color: transparent;
  color: #ffffff;
}

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

.article-card {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 24px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.84);
  min-height: 100%;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease;
}

.article-card.hidden {
  display: none;
}

.article-card h3 {
  margin: 0;
  font-size: 1.28rem;
  line-height: 1.35;
}

.article-card p {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.75;
}

.meta-row {
  justify-content: space-between;
  gap: 12px;
}

.meta-row strong {
  font-size: 0.92rem;
}

.read-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: auto;
  color: var(--accent);
  font-weight: 700;
}

.empty-state {
  margin: 16px 0 0;
  color: var(--text-soft);
}

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

.note-card {
  padding: 28px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.84);
}

.note-card h3,
.account-card h3,
.auth-card h3 {
  margin: 16px 0 10px;
  font-size: 1.26rem;
  line-height: 1.4;
}

.about-card {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 28px;
  padding: 34px;
  border-radius: 30px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.94), rgba(242, 247, 255, 0.92)),
    #ffffff;
}

.about-card.compact {
  grid-template-columns: 1fr;
  padding: 28px;
}

.about-copy h2 {
  font-size: clamp(2.2rem, 3.6vw, 4rem);
}

.about-meta {
  display: grid;
  gap: 14px;
}

.about-meta article,
.account-meta-list article {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
  min-height: 126px;
  padding: 22px;
  border-radius: 24px;
  background: rgba(246, 250, 255, 0.9);
  border: 1px solid rgba(16, 24, 38, 0.06);
}

.about-meta strong,
.account-meta-list strong,
.stat-card strong,
.user-title strong {
  font-size: 1.16rem;
}

.footer {
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 14px 20px;
  padding: 28px 6px 16px;
  color: var(--text-soft);
}

.footer-main {
  flex: 1;
  min-width: 0;
}

.footer-copy {
  margin: 0;
  line-height: 1.6;
}

.footer-beian {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0 16px;
  margin-left: 12px;
  vertical-align: middle;
}

.footer-beian-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--text-soft);
  text-decoration: none;
  white-space: nowrap;
}

.footer-beian-link:hover {
  color: var(--text);
}

.footer-beian-icon {
  display: inline-block !important;
  width: 14px;
  height: 16px;
  flex-shrink: 0;
  object-fit: contain;
}

.footer-home {
  color: var(--text-soft);
  flex-shrink: 0;
}

.article-page {
  padding-top: 48px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  margin-bottom: 18px;
  color: var(--text-soft);
}

.article-hero,
.article-body {
  border-radius: 30px;
  padding: 34px;
}

.article-hero {
  margin-bottom: 20px;
}

.article-hero h1 {
  margin: 14px 0 18px;
  font-size: clamp(2.5rem, 5vw, 4.4rem);
  line-height: 1.05;
}

.article-meta {
  flex-wrap: wrap;
  gap: 14px;
}

.article-body {
  background: rgba(255, 255, 255, 0.88);
}

.article-body h2 {
  margin: 32px 0 12px;
  font-size: 1.7rem;
}

.article-body ul {
  margin: 0;
  padding-left: 22px;
}

.article-body li+li {
  margin-top: 10px;
}

.article-callout {
  margin: 28px 0;
  padding: 20px 22px;
  border-left: 4px solid var(--accent);
  border-radius: 20px;
  background: var(--panel-muted);
  color: var(--text);
  line-height: 1.8;
}

.related-section {
  padding-top: 20px;
}

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

.auth-shell,
.account-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  padding: 56px 0 0;
}

.auth-feature,
.auth-card,
.account-card,
.admin-panel,
.empty-page {
  padding: 34px;
  border-radius: 30px;
  background: rgba(255, 255, 255, 0.88);
}

.auth-feature-card {
  display: grid;
  gap: 8px;
  margin-top: 28px;
  padding: 22px;
  border-radius: 24px;
  background:
    linear-gradient(180deg, rgba(217, 235, 255, 0.7), rgba(255, 255, 255, 0.92)),
    #ffffff;
  border: 1px solid rgba(16, 24, 38, 0.06);
}

.auth-feature-card strong {
  font-size: 1.08rem;
}

.auth-form,
.compact-form {
  display: grid;
  gap: 16px;
}

.field {
  display: grid;
  gap: 10px;
}

.switch-text {
  margin-top: 18px;
  color: var(--text-soft);
}

.switch-text a {
  color: var(--accent);
  font-weight: 700;
}

.account-meta-list {
  display: grid;
  gap: 14px;
}

.stats-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-bottom: 22px;
}

.stat-card {
  padding: 24px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.86);
}

.stat-card strong {
  display: block;
  margin-top: 10px;
  font-size: 2rem;
}

.admin-panel {
  display: grid;
  gap: 20px;
}

.admin-search {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  gap: 14px;
}

.user-list {
  display: grid;
  gap: 14px;
}

.user-row {
  display: grid;
  gap: 18px;
  padding: 24px;
  border-radius: 24px;
  background: rgba(247, 250, 255, 0.92);
}

.user-main,
.user-side,
.user-title,
.user-tags,
.user-info {
  display: flex;
}

.user-main,
.user-side {
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.user-title {
  flex-direction: column;
  gap: 6px;
}

.user-tags,
.user-actions {
  flex-wrap: wrap;
  gap: 10px;
}

.user-info {
  flex-wrap: wrap;
  gap: 14px;
}

.empty-page {
  width: min(100%, 760px);
  margin: 64px auto 0;
  text-align: left;
}

@keyframes float-up {
  from {
    opacity: 0;
    transform: translateY(16px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1100px) {

  .hero,
  .feature-strip,
  .about-card,
  .section-head,
  .auth-shell,
  .account-grid {
    grid-template-columns: 1fr;
  }

  .section-head {
    display: grid;
  }

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

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

  .topbar {
    border-radius: 28px;
  }

  .topbar-right {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 760px) {
  .site-shell {
    width: min(calc(100% - 24px), var(--content-width));
  }

  .topbar {
    top: 10px;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    border-radius: 24px;
  }

  .topbar-right,
  .nav,
  .nav-actions {
    width: 100%;
    justify-content: flex-start;
  }

  .nav-actions {
    gap: 8px;
  }

  .nav-link,
  .nav-button,
  .nav-cta {
    min-width: 88px;
  }

  .hero {
    padding-top: 38px;
  }

  .hero-copy,
  .hero-media {
    min-height: auto;
  }

  .hero-copy,
  .feature-card,
  .note-card,
  .about-card,
  .article-hero,
  .article-body,
  .article-card,
  .auth-feature,
  .auth-card,
  .account-card,
  .admin-panel,
  .stat-card,
  .user-row,
  .empty-page {
    padding: 24px;
  }

  .hero h1,
  .article-hero h1,
  .auth-shell h1,
  .empty-page h1 {
    font-size: clamp(2.2rem, 12vw, 3.4rem);
  }

  .hero-stats,
  .article-grid,
  .related-grid,
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .toolbar,
  .admin-search,
  .user-main,
  .user-side,
  .footer {
    align-items: stretch;
  }

  .search-box {
    min-width: 100%;
  }

  .footer {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .footer-beian {
    margin-left: 0;
    justify-content: center;
  }

  .user-side,
  .user-main {
    flex-direction: column;
  }
}

.editor-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 16px;
  margin-bottom: -1px;
  border: 1px solid rgba(16, 24, 38, 0.1);
  border-radius: 16px 16px 0 0;
  background: rgba(248, 250, 252, 0.95);
}

.toolbar-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 10px;
  background: rgba(16, 24, 38, 0.06);
  color: var(--text-soft);
  font-size: 0.88rem;
  cursor: pointer;
  transition: all 180ms ease;
}

.toolbar-btn:hover {
  background: rgba(29, 92, 255, 0.1);
  color: var(--accent);
}

.field-hint {
  margin: 8px 0 0;
  font-size: 0.86rem;
  color: var(--text-soft);
}

.form-row {
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
}

.form-row .field {
  flex: 1;
}

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

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(16, 24, 38, 0.5);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal-content {
  position: relative;
  width: min(90%, 480px);
  padding: 28px;
  border-radius: 24px;
  background: #ffffff;
  box-shadow: 0 20px 60px rgba(16, 24, 38, 0.2);
}

.modal-content .close {
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 24px;
  cursor: pointer;
  color: var(--text-soft);
}

.modal-content h3 {
  margin: 0 0 20px;
  font-size: 1.32rem;
}

.modal-content input[type="file"] {
  display: block;
  margin-bottom: 16px;
  padding: 12px;
  border: 2px dashed rgba(16, 24, 38, 0.15);
  border-radius: 12px;
  width: 100%;
}

.modal-content #uploadStatus {
  margin-top: 12px;
  font-size: 0.9rem;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.admin-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  padding: 6px;
  border-radius: 16px;
  background: rgba(248, 250, 252, 0.9);
  border: 1px solid rgba(16, 24, 38, 0.06);
}

.admin-tab {
  display: inline-flex;
  align-items: center;
  padding: 12px 24px;
  border-radius: 12px;
  color: var(--text-soft);
  font-weight: 600;
  transition: all 180ms ease;
}

.admin-tab:hover {
  background: rgba(29, 92, 255, 0.06);
  color: var(--text);
}

.admin-tab.active {
  background: linear-gradient(135deg, #1d5cff 0%, #0f1420 100%);
  color: white;
  box-shadow: 0 10px 28px rgba(29, 92, 255, 0.35);
}