:root {
  --bg-deep: #0a192f;
  --bg-card: #112240;
  --bg-glass: rgba(230, 241, 255, 0.08);
  --line-mute: #233554;
  --line-soft: rgba(230, 241, 255, 0.14);
  --accent: #ff6b35;
  --accent-dim: rgba(255, 107, 53, 0.14);
  --accent-green: #39ff14;
  --accent-green-dim: rgba(57, 255, 20, 0.1);
  --text-bright: #e6f1ff;
  --text-muted: #8892b0;
  --text-faint: #a8b2d1;
  --font-display: "Archivo Black", "Arial Black", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Roboto Mono", "SFMono-Regular", "Cascadia Mono", Consolas, monospace;
  --space: 1rem;
  --radius: 6px;
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
  --transition: 0.3s ease;
  --header-h: 74px;
  --content-w: 1240px;
}

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

html {
  scroll-behavior: smooth;
  background: var(--bg-deep);
}

body {
  margin: 0;
  background:
    linear-gradient(115deg, transparent 0%, transparent 62%, rgba(255, 107, 53, 0.05) 62%, rgba(255, 107, 53, 0.05) 63%, transparent 63%, transparent 100%),
    linear-gradient(30deg, transparent 0%, transparent 82%, rgba(57, 255, 20, 0.03) 82%, rgba(57, 255, 20, 0.03) 83%, transparent 83%),
    var(--bg-deep);
  color: var(--text-bright);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9998;
  background-image:
    linear-gradient(rgba(230, 241, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(230, 241, 255, 0.02) 1px, transparent 1px);
  background-size: 34px 34px;
}

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

a {
  color: var(--text-bright);
  text-decoration: none;
  transition: color var(--transition), border-color var(--transition), background var(--transition), transform var(--transition);
}

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

button {
  font-family: var(--font-body);
  cursor: pointer;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  line-height: 1.1;
  color: var(--text-bright);
  margin: 0 0 0.5em;
  letter-spacing: 0.01em;
}

p {
  margin: 0 0 1rem;
}

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

::selection {
  background: var(--accent);
  color: var(--bg-deep);
}

.container {
  width: min(100% - 3rem, var(--content-w));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 10000;
  background: var(--accent);
  color: var(--bg-deep);
  font-weight: 700;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius);
  transform: translateY(-300%);
  transition: transform var(--transition);
}

.skip-link:focus-visible {
  transform: translateY(0);
  color: var(--bg-deep);
}

.pulse-line {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 100%;
  z-index: 9000;
  background: rgba(57, 255, 20, 0.1);
  pointer-events: none;
}

.pulse-line::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, var(--accent-green), var(--accent), transparent);
  transform: translateX(-100%);
  animation: pulseShift 3.2s infinite;
}

@keyframes pulseShift {
  0% { transform: translateX(-100%); }
  50% { transform: translateX(100%); }
  100% { transform: translateX(100%); }
}

.site-header {
  position: sticky;
  top: calc(var(--space) * 0.75);
  z-index: 8000;
  padding: 0;
  margin: calc(var(--space) * 0.75) auto 0;
  width: min(calc(100% - 2rem), 1320px);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  background: var(--bg-glass);
  border: 1px solid var(--line-mute);
  border-radius: 56px;
  padding: 0.65rem 1.4rem 0.65rem 0.8rem;
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex: 0 0 auto;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent) 0%, #d9481c 100%);
  color: var(--bg-deep);
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: -0.02em;
  box-shadow: 0 0 0 1px rgba(255,107,53,0.4), 0 0 22px rgba(255,107,53,0.25);
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--text-bright);
  letter-spacing: 0.02em;
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.brand-name small {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav a {
  display: inline-block;
  padding: 0.55rem 1.05rem;
  border-radius: 36px;
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--text-bright);
  border: 1px solid transparent;
}

.nav a:hover {
  color: var(--accent-green);
  background: rgba(57, 255, 20, 0.06);
  border-color: rgba(57, 255, 20, 0.25);
}

.nav a[aria-current="page"] {
  color: var(--bg-deep);
  background: var(--accent-green);
  border-color: var(--accent-green);
  box-shadow: 0 0 20px rgba(57, 255, 20, 0.3);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.45rem;
  background: transparent;
  border: 1px solid var(--line-soft);
  border-radius: 40px;
  padding: 0.45rem 0.9rem;
  color: var(--text-bright);
  font-size: 0.85rem;
}

.nav-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.nav-toggle-box {
  display: flex;
  flex-direction: column;
  gap: 3px;
  width: 18px;
}

.nav-toggle-box i {
  height: 2px;
  width: 100%;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.site-footer {
  margin-top: 6rem;
  background: linear-gradient(180deg, #071220, #040b16);
  border-top: 1px solid var(--line-mute);
  position: relative;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 30%;
  height: 2px;
  background: var(--accent);
  box-shadow: 0 0 20px var(--accent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.4fr;
  gap: 3rem;
  padding: 4.5rem 0 3rem;
}

.footer-brand .footer-logo {
  font-family: var(--font-display);
  font-size: 1.6rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.2rem;
  color: var(--text-bright);
}

.footer-logo .brand-mark {
  width: 48px;
  height: 48px;
  font-size: 1.15rem;
}

.footer-trust {
  color: var(--text-muted);
  font-size: 0.95rem;
  max-width: 38rem;
  border-left: 2px solid var(--accent);
  padding-left: 1rem;
}

.footer-title {
  display: block;
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--text-bright);
  margin-bottom: 1.1rem;
  letter-spacing: 0.06em;
  position: relative;
  padding-bottom: 0.45rem;
}

.footer-title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 28px;
  height: 2px;
  background: var(--accent);
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-nav a {
  color: var(--text-faint);
  font-size: 0.92rem;
}

.footer-nav a:hover {
  color: var(--accent-green);
  padding-left: 4px;
}

.footer-info {
  display: flex;
  flex-direction: column;
  gap: 0.38rem;
  color: var(--text-faint);
  font-size: 0.92rem;
}

.footer-info a {
  color: var(--text-faint);
  width: fit-content;
}

.footer-info a:hover {
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid rgba(35, 53, 84, 0.6);
  background: rgba(0, 0, 0, 0.2);
}

.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 1.25rem 0;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-bottom a {
  color: var(--text-muted);
  border-bottom: 1px dashed var(--line-mute);
}

.footer-bottom a:hover {
  color: var(--accent-green);
  border-color: var(--accent-green);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.75rem 1.6rem;
  border-radius: 4px;
  background: var(--bg-glass);
  border: 1px solid var(--line-soft);
  color: var(--text-bright);
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1;
  transition: background var(--transition), border-color var(--transition), color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.btn:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  color: var(--accent);
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg-deep);
  box-shadow: 0 6px 24px rgba(255, 107, 53, 0.28);
}

.btn-primary:hover {
  background: #ff7f4d;
  border-color: #ff7f4d;
  color: var(--bg-deep);
  box-shadow: 0 8px 28px rgba(255, 107, 53, 0.4);
}

.btn-ghost {
  background: transparent;
  border-color: var(--line-mute);
  color: var(--text-bright);
}

.btn-ghost:hover {
  border-color: var(--accent-green);
  color: var(--accent-green);
  background: rgba(57, 255, 20, 0.05);
}

.section-head {
  margin-bottom: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.kicker {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.25rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.2rem);
  margin: 0;
  text-transform: uppercase;
}

.section-desc {
  color: var(--text-muted);
  max-width: 48rem;
  font-size: 1rem;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  padding: 1rem 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--line-mute);
  margin-bottom: 2rem;
}

.breadcrumb a {
  color: var(--text-muted);
}

.breadcrumb a:hover {
  color: var(--accent-green);
}

.card {
  background: linear-gradient(145deg, rgba(17, 34, 64, 0.9), rgba(10, 25, 47, 0.8));
  border: 1px solid var(--line-mute);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 1.5rem;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}

.card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent 60%);
  opacity: 0.4;
  transition: opacity 0.2s;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 107, 53, 0.8);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
}

.card:hover::after {
  opacity: 1;
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.12rem;
  margin-bottom: 0.35rem;
}

.card-data {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent-green);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.card-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.4rem;
}

.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1.15rem;
}

.image-container {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background-color: var(--bg-card);
  background-image:
    linear-gradient(135deg, rgba(57, 255, 20, 0.09) 0%, transparent 30%, rgba(255, 107, 53, 0.09) 70%, transparent 100%),
    repeating-linear-gradient(-45deg, rgba(230, 241, 255, 0.04) 0 2px, transparent 2px 8px);
  border: 1px solid var(--line-mute);
  min-height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.image-container::before {
  content: attr(data-placeholder);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-faint);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.25rem 0 1.5rem;
}

.filter-btn {
  background: var(--bg-glass);
  border: 1px solid var(--line-mute);
  color: var(--text-faint);
  border-radius: 40px;
  padding: 0.45rem 1.2rem;
  font-size: 0.86rem;
  font-weight: 500;
  transition: all var(--transition);
}

.filter-btn:hover {
  border-color: var(--accent);
  color: var(--text-bright);
}

.filter-btn.is-active {
  background: var(--accent-green-dim);
  border-color: var(--accent-green);
  color: var(--accent-green);
  box-shadow: 0 0 16px rgba(57, 255, 20, 0.12);
}

.topic-list {
  list-style: none;
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--line-mute);
}

.topic-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0.5rem;
  border-bottom: 1px solid rgba(35, 53, 84, 0.6);
  transition: background 0.2s, padding-left 0.2s;
}

.topic-item:hover {
  padding-left: 0.8rem;
  background: rgba(57, 255, 20, 0.04);
}

.topic-item-title {
  color: var(--text-bright);
  font-weight: 600;
  font-size: 0.95rem;
}

.topic-item-extra {
  color: var(--text-muted);
  font-size: 0.85rem;
  font-family: var(--font-mono);
  white-space: nowrap;
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 0.75rem;
  margin-top: 1rem;
}

.meta-grid div {
  background: rgba(230, 241, 255, 0.04);
  border-left: 2px solid var(--accent);
  padding: 0.7rem 0.9rem;
}

.meta-grid span {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--accent-green);
}

.meta-grid em {
  font-style: normal;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

@media (max-width: 960px) {
  .nav-container {
    border-radius: 28px;
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0.2rem;
    padding: 0.8rem 0 0.2rem;
    border-top: 1px solid var(--line-mute);
    margin-top: 0.5rem;
  }

  .nav[data-open] {
    display: flex;
  }

  .nav a {
    border-radius: 10px;
    padding: 0.8rem 1rem;
    font-size: 1rem;
  }

  .nav a[aria-current="page"] {
    background: transparent;
    color: var(--accent-green);
    border-color: transparent;
    box-shadow: none;
    border-bottom: 2px solid var(--accent-green);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2.2rem;
  }

  .footer-trust {
    max-width: 100%;
  }
}

@media (max-width: 640px) {
  :root {
    --header-h: 64px;
  }

  .container {
    width: min(100% - 1.5rem, var(--content-w));
  }

  .site-header {
    width: calc(100% - 1rem);
  }

  .nav-container {
    border-radius: 20px;
    padding: 0.5rem 0.9rem;
  }

  .brand-name {
    font-size: 1rem;
  }

  .brand-name small {
    display: none;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
    font-size: 0.9rem;
  }

  .btn {
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
  }
}

@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;
  }

  .pulse-line {
    display: none;
  }
}