*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg-primary: #0a0a0f;
  --bg-panel: #16161e;
  --bg-panel-2: #1c1c28;
  --warm-paper: #f5e9d7;
  --neon-purple: #a855f7;
  --electric-blue: #00e5ff;
  --rose: #ff2e88;
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-on-warm: #1a1a1a;
  --font-heading: "PingFang SC Heavy", "Noto Sans SC Black", "Microsoft YaHei", sans-serif;
  --font-body: "Yuanti SC", "YouYuan", "Microsoft YaHei", sans-serif;
  --container-w: 1320px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --line-dark: #232330;
  --line-mid: #2e2e3c;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.75;
  letter-spacing: 0.02em;
  min-height: 100vh;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  line-height: 1.25;
  color: var(--text-primary);
}

h1,
h2,
h3 {
  text-shadow: 0 2px 14px rgba(168, 85, 247, 0.28);
}

p {
  margin-bottom: 12px;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--electric-blue);
}

button {
  font: inherit;
  color: inherit;
}

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

ul,
ol {
  list-style: none;
}

::selection {
  background: var(--neon-purple);
  color: #ffffff;
}

[hidden] {
  display: none !important;
}

:focus-visible {
  outline: 3px solid var(--electric-blue);
  outline-offset: 2px;
  border-radius: 2px;
}

::-webkit-scrollbar {
  width: 10px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: #0d0d14;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--neon-purple), var(--rose));
  border-radius: 8px;
  border: 2px solid #0d0d14;
}

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

.section {
  padding-block: 40px;
}

.grid {
  display: grid;
  gap: 24px;
}

@media (min-width: 768px) {
  .grid-cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 992px) {
  .grid-cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--line-dark);
  padding: 24px;
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
}

.card {
  background: var(--bg-panel);
  border: 1px solid var(--line-dark);
  border-radius: 14px;
  padding: 24px;
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
  border-color: var(--neon-purple);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(168, 85, 247, 0.15);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.4;
  border: 1px solid transparent;
  cursor: pointer;
  color: #ffffff;
  background: var(--neon-purple);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: filter 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  filter: brightness(1.12);
  color: #ffffff;
}

.btn-primary {
  background: linear-gradient(135deg, var(--neon-purple), var(--rose));
}

.btn-ghost {
  background: transparent;
  border-color: var(--electric-blue);
  color: var(--electric-blue);
}

.btn-ghost:hover {
  background: rgba(0, 229, 255, 0.1);
  color: var(--electric-blue);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.4;
  border: 1px solid var(--line-mid);
  background: var(--bg-panel);
  color: var(--text-primary);
  cursor: pointer;
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.filter-btn:hover {
  border-color: var(--electric-blue);
  color: var(--electric-blue);
  transform: translateY(-1px);
}

.filter-btn[aria-pressed="true"] {
  background: linear-gradient(135deg, var(--neon-purple), var(--rose));
  border-color: transparent;
  color: #ffffff;
}

.figure-frame {
  position: relative;
  display: block;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(168, 85, 247, 0.18), rgba(0, 229, 255, 0.06)),
    repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.02) 0 2px, transparent 2px 10px),
    var(--bg-panel);
  border: 1px solid var(--line-dark);
  clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
}

.figure-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.012) 0 2px, transparent 2px 10px);
  mix-blend-mode: screen;
}

.figure-frame img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-ratio-16x9 {
  aspect-ratio: 16 / 9;
}

.img-ratio-4x3 {
  aspect-ratio: 4 / 3;
}

.img-ratio-1x1 {
  aspect-ratio: 1 / 1;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 16px 0;
  margin: 0;
  list-style: none;
  font-family: var(--font-heading);
  font-size: 13px;
  color: var(--text-secondary);
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb li + li::before {
  content: "/";
  color: var(--neon-purple);
}

.breadcrumb a {
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.breadcrumb a:hover {
  color: var(--electric-blue);
}

.note-warm {
  background: var(--warm-paper);
  color: var(--text-on-warm);
  padding: 16px 20px;
  font-size: 13px;
  line-height: 1.8;
  border-radius: 0 12px 12px 12px;
  border-left: 4px solid var(--rose);
}

.text-secondary {
  color: var(--text-secondary);
}

.text-rose {
  color: var(--rose);
}

.text-blue {
  color: var(--electric-blue);
}

.text-purple {
  color: var(--neon-purple);
}

/* ===================== 页头 ===================== */

.site-header {
  position: relative;
  z-index: 100;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--line-dark);
}

.site-header::before {
  content: "";
  display: block;
  height: 4px;
  background: linear-gradient(90deg, var(--neon-purple), var(--electric-blue), var(--rose));
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 8px;
  z-index: 2000;
  background: var(--neon-purple);
  color: #ffffff;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  padding: 8px 18px;
  border-radius: 0 10px 10px 0;
  transition: left 0.2s ease;
}

.skip-link:focus {
  left: 0;
  color: #ffffff;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 3000;
  pointer-events: none;
  transform: scaleX(var(--progress, 0));
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--neon-purple), var(--electric-blue), var(--rose));
}

.header-edge {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: 20px;
  min-height: 30px;
  padding: 4px 24px;
  background: #0f0f16;
  border-bottom: 1px solid var(--line-dark);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--text-secondary);
  overflow: hidden;
  white-space: nowrap;
}

.edge-author {
  color: var(--neon-purple);
  font-weight: 700;
}

.edge-publication {
  overflow: hidden;
  text-overflow: ellipsis;
}

.edge-date {
  margin-left: auto;
  color: var(--text-secondary);
}

.edge-num {
  color: var(--rose);
  font-family: var(--font-heading);
  letter-spacing: 0.1em;
}

.header-shell {
  position: relative;
  width: min(100% - 32px, var(--container-w));
  margin-inline: auto;
}

.header-top {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 76px;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-right: auto;
  color: var(--text-primary);
}

.header-brand:hover {
  color: var(--text-primary);
}

.brand-badge {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 900;
  color: #ffffff;
  background: linear-gradient(135deg, var(--neon-purple) 0%, var(--rose) 100%);
  clip-path: polygon(20% 0, 100% 0, 100% 80%, 80% 100%, 0 100%, 0 20%);
  box-shadow: 0 0 18px rgba(168, 85, 247, 0.35);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  min-width: 0;
}

.brand-name {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 0.08em;
  -webkit-text-stroke: 0.5px rgba(168, 85, 247, 0.5);
  text-shadow: 0 0 12px rgba(255, 46, 136, 0.3);
  white-space: nowrap;
}

.header-title {
  display: none;
  font-size: 12px;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 480px;
}

.header-note {
  display: none;
  font-size: 12px;
  color: var(--electric-blue);
  border: 1px solid rgba(0, 229, 255, 0.35);
  padding: 5px 12px;
  background: rgba(0, 229, 255, 0.06);
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  white-space: nowrap;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: var(--bg-panel);
  color: var(--text-primary);
  border: 1px solid var(--line-mid);
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.nav-toggle[aria-expanded="true"] {
  background: var(--neon-purple);
  border-color: var(--neon-purple);
  color: #ffffff;
}

.nav-toggle-marks {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 16px;
}

.nav-toggle-marks span {
  display: block;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.3s var(--ease-out), opacity 0.3s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-marks span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-marks span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-marks span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.site-nav {
  position: relative;
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  visibility: hidden;
  border-top: 1px solid transparent;
  transition: max-height 0.4s var(--ease-out), opacity 0.3s ease, border-color 0.2s ease, visibility 0.3s;
}

.site-nav[data-open] {
  max-height: 520px;
  opacity: 1;
  visibility: visible;
  border-top-color: var(--line-dark);
}

.nav-list {
  display: flex;
  flex-direction: column;
  padding: 8px 0;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 16px;
  color: var(--text-primary);
  border-left: 3px solid transparent;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.nav-link:hover {
  color: var(--electric-blue);
  background: rgba(255, 255, 255, 0.02);
}

.nav-link[aria-current="page"] {
  background: linear-gradient(90deg, rgba(168, 85, 247, 0.14), rgba(168, 85, 247, 0.02));
  border-left-color: var(--neon-purple);
  color: #ffffff;
}

.nav-link[aria-current="page"] .link-num {
  color: var(--electric-blue);
}

.nav-item + .nav-item {
  border-top: 1px dashed var(--line-mid);
}

.link-num {
  font-family: var(--font-heading);
  font-size: 11px;
  color: var(--rose);
  letter-spacing: 0.08em;
  min-width: 22px;
}

.nav-index {
  display: none;
  font-size: 11px;
  color: var(--text-secondary);
  letter-spacing: 0.3em;
  white-space: nowrap;
  writing-mode: vertical-rl;
  border-left: 1px solid var(--line-mid);
  padding: 10px 12px;
}

/* ===================== 页脚 ===================== */

.site-footer {
  position: relative;
  overflow: hidden;
  background: #0d0d12;
  border-top: 1px solid var(--line-dark);
  margin-top: 80px;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--neon-purple), var(--electric-blue), var(--rose));
  opacity: 0.8;
}

.footer-top {
  display: grid;
  gap: 36px;
  width: min(100% - 32px, var(--container-w));
  margin-inline: auto;
  padding: 44px 0 36px;
}

.footer-brand {
  max-width: 380px;
}

.footer-brand-block {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.footer-brand-name {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 0.06em;
}

.footer-slogan {
  font-size: 14px;
  color: var(--text-secondary);
  border-left: 3px solid var(--rose);
  padding-left: 12px;
  margin-bottom: 14px;
}

.footer-trust {
  font-size: 12px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.footer-nav,
.footer-contact {
  min-width: 0;
}

.footer-heading {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--warm-paper);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--line-mid);
}

.footer-heading::before {
  content: "◆";
  color: var(--neon-purple);
  margin-right: 8px;
  font-size: 10px;
}

.footer-links {
  display: grid;
  gap: 10px;
}

.footer-links a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-links a:hover {
  color: var(--electric-blue);
  padding-left: 6px;
}

.footer-contact-list {
  display: grid;
  gap: 8px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.footer-bottom {
  border-top: 1px solid var(--line-dark);
  background: #08080c;
}

.footer-bottom-inner {
  width: min(100% - 32px, var(--container-w));
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  font-size: 12px;
  color: var(--text-secondary);
}

/* ===================== 响应式增强 ===================== */

@media (min-width: 768px) {
  .header-title {
    display: block;
  }

  .edge-publication {
    display: inline;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 40px 48px;
  }
}

@media (min-width: 992px) {
  .header-edge {
    padding-inline: 32px;
  }

  .header-shell {
    padding-left: 48px;
  }

  .header-shell::before {
    content: "";
    position: absolute;
    left: 10px;
    top: 10px;
    bottom: 10px;
    width: 3px;
    background: linear-gradient(180deg, var(--neon-purple), var(--electric-blue) 60%, var(--rose));
    border-radius: 2px;
    opacity: 0.7;
    pointer-events: none;
  }

  .header-top {
    min-height: 80px;
  }

  .header-note {
    display: inline-flex;
  }

  .nav-toggle {
    display: none;
  }

  .site-nav {
    overflow: visible;
    max-height: none;
    opacity: 1;
    visibility: visible;
    border-top-color: var(--line-dark);
  }

  .nav-list {
    flex-direction: row;
    align-items: stretch;
    padding: 0;
    overflow-x: auto;
  }

  .nav-item {
    position: relative;
  }

  .nav-item + .nav-item {
    border-top: none;
  }

  .nav-item + .nav-item .nav-link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 18%;
    bottom: 18%;
    width: 1px;
    background: linear-gradient(180deg, transparent, var(--line-mid), transparent);
  }

  .nav-link {
    padding: 14px 22px;
    border-left: none;
  }

  .nav-link[aria-current="page"] {
    background: linear-gradient(180deg, rgba(168, 85, 247, 0.16), rgba(168, 85, 247, 0.02));
    border-left: none;
    box-shadow: inset 0 3px 0 var(--neon-purple);
  }

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

  .footer-top {
    grid-template-columns: 2fr 1fr 1fr 1.4fr;
    padding: 64px 0 48px;
  }
}

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