:root {
  --color-black: #0D0D0D;
  --color-card: #121212;
  --color-purple: #6A0DAD;
  --color-midnight-purple: #3B0B5E;
  --color-gold: #FFD700;
  --color-warm-gold: #E6C200;
  --color-green: #00FF88;
  --color-white: #F5F5F5;
  --color-silver: #E0E0E0;
  --font-heading: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-body: "DengXian", "PingFang SC", "Helvetica Neue", sans-serif;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --container-width: 1280px;
  --header-height: 76px;
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.55s ease;
}

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

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

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-white);
  background-color: var(--color-black);
  background-image:
    linear-gradient(rgba(106, 13, 173, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(106, 13, 173, 0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  line-height: 1.25;
  color: var(--color-white);
  text-shadow: 0 0 10px rgba(106, 13, 173, 0.8), 0 0 20px rgba(255, 215, 0, 0.4);
}

p {
  margin-bottom: 1em;
}

ul,
ol {
  padding-left: 1.5em;
}

a {
  color: var(--color-gold);
  text-decoration: none;
  transition: color var(--transition-fast), text-decoration-color var(--transition-fast);
}

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

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

button {
  font-family: inherit;
  line-height: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

::selection {
  background: var(--color-purple);
  color: var(--color-white);
}

:focus-visible {
  outline: 3px solid var(--color-green);
  outline-offset: 2px;
  border-radius: 4px;
}

.js-enabled [data-reveal="hidden"] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.js-enabled [data-reveal="visible"] {
  opacity: 1;
  transform: none;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(16px, 4vw, 40px);
  padding-right: clamp(16px, 4vw, 40px);
}

.skip-link {
  position: fixed;
  top: -80px;
  left: 16px;
  z-index: 2000;
  padding: 12px 18px;
  background: var(--color-purple);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  border-radius: var(--radius-md);
  box-shadow: 0 0 20px rgba(106, 13, 173, 0.6);
  transition: top var(--transition-base), background var(--transition-base);
}

.skip-link:focus {
  top: 16px;
  outline: 3px solid var(--color-green);
  outline-offset: 2px;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1500;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--color-purple), var(--color-gold), var(--color-green));
  pointer-events: none;
  border-radius: 0 3px 3px 0;
  will-change: width;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 13, 13, 0.92);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(230, 194, 0, 0.16);
}

.header-meta {
  background: linear-gradient(90deg, var(--color-purple) 0%, var(--color-midnight-purple) 55%, var(--color-warm-gold) 100%);
  color: var(--color-white);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1.6;
  text-align: center;
  padding: 5px 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.header-meta-version {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 255, 136, 0.16);
  border: 1px solid rgba(0, 255, 136, 0.5);
  color: var(--color-green);
  font-weight: 800;
  font-size: 11px;
  border-radius: var(--radius-pill);
  padding: 1px 10px;
}

.header-meta-desc {
  color: var(--color-white);
}

.header-bar {
  position: relative;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: var(--header-height);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-symbol {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--color-purple) 15%, var(--color-gold) 90%);
  color: var(--color-white);
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 22px;
  box-shadow: 0 0 18px rgba(106, 13, 173, 0.65), 0 0 26px rgba(255, 215, 0, 0.2);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.brand-title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 0.06em;
  line-height: 1.2;
  color: var(--color-white);
  text-shadow: 0 0 10px rgba(106, 13, 173, 0.8), 0 0 20px rgba(255, 215, 0, 0.4);
}

.brand-subtitle {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--color-warm-gold);
  line-height: 1.4;
  text-transform: uppercase;
}

.site-nav .nav-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-list a {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  color: var(--color-silver);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}

.nav-list a:hover {
  color: var(--color-white);
  background: rgba(106, 13, 173, 0.32);
  box-shadow: 0 0 12px rgba(106, 13, 173, 0.2);
}

.nav-list [aria-current="page"] {
  color: var(--color-black);
  background: linear-gradient(135deg, var(--color-purple) 10%, var(--color-gold) 100%);
  font-weight: 700;
  box-shadow: 0 0 18px rgba(106, 13, 173, 0.5);
}

.nav-list [aria-current="page"]:hover {
  color: var(--color-black);
}

.nav-index {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--color-warm-gold);
  opacity: 0.75;
}

.nav-list [aria-current="page"] .nav-index {
  color: rgba(0, 0, 0, 0.65);
  opacity: 1;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  border: 1px solid rgba(230, 194, 0, 0.35);
  background: rgba(18, 18, 18, 0.8);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.nav-toggle:hover {
  border-color: var(--color-green);
  box-shadow: 0 0 16px rgba(0, 255, 136, 0.2);
}

.nav-toggle-line {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 4px;
  background: var(--color-gold);
  transition: transform var(--transition-base), opacity var(--transition-base), background var(--transition-base);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
  background: var(--color-green);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
  background: var(--color-green);
}

.site-footer {
  position: relative;
  background: var(--color-black);
  padding-top: 0;
  margin-top: 80px;
  border-top: 1px solid rgba(106, 13, 173, 0.4);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -3px;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-purple), var(--color-gold), var(--color-green));
  opacity: 0.8;
  pointer-events: none;
}

.to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  background: rgba(13, 13, 13, 0.9);
  border: 1px solid rgba(255, 215, 0, 0.4);
  color: var(--color-gold);
  font-size: 13px;
  font-weight: 700;
  box-shadow: 0 4px 24px rgba(106, 13, 173, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base), box-shadow var(--transition-base);
}

.to-top:hover {
  color: var(--color-green);
  border-color: var(--color-green);
  box-shadow: 0 0 24px rgba(0, 255, 136, 0.25);
}

.to-top[data-shown="true"] {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-top: 56px;
  padding-bottom: 48px;
}

.footer-brand-name {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--color-white);
  text-shadow: 0 0 12px rgba(106, 13, 173, 0.7), 0 0 24px rgba(255, 215, 0, 0.25);
}

.version-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  background: rgba(0, 255, 136, 0.12);
  border: 1px solid rgba(0, 255, 136, 0.45);
  color: var(--color-green);
  font-size: 12px;
  font-weight: 800;
  line-height: 1.5;
  vertical-align: middle;
}

.footer-trust {
  margin-top: 14px;
  max-width: 56ch;
  color: var(--color-silver);
  font-size: 14px;
  line-height: 1.7;
}

.footer-nav ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav a {
  color: var(--color-silver);
  font-size: 14px;
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.footer-nav a:hover {
  color: var(--color-gold);
  padding-left: 6px;
}

.footer-title {
  margin-bottom: 16px;
  padding-bottom: 8px;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.1em;
  color: var(--color-gold);
  text-transform: uppercase;
  position: relative;
}

.footer-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 32px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-purple), var(--color-gold));
}

.footer-contact {
  color: var(--color-silver);
  font-size: 14px;
  line-height: 1.8;
}

.footer-contact-item {
  margin-bottom: 8px;
}

.footer-legal {
  background: rgba(13, 13, 13, 0.85);
  border-top: 1px solid rgba(230, 194, 0, 0.16);
  padding-top: 22px;
  padding-bottom: 22px;
}

.footer-legal-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--color-silver);
  font-size: 13px;
}

.footer-icp {
  color: var(--color-warm-gold);
  font-variant-numeric: tabular-nums;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: box-shadow var(--transition-fast), transform var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-purple) 0%, var(--color-gold) 100%);
  color: var(--color-white);
  box-shadow: 0 0 14px rgba(106, 13, 173, 0.35);
}

.btn-primary:hover {
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 0 24px rgba(106, 13, 173, 0.55), 0 0 24px rgba(255, 215, 0, 0.25);
}

.btn-outline {
  border-color: rgba(230, 194, 0, 0.55);
  color: var(--color-gold);
  background: transparent;
}

.btn-outline:hover {
  color: var(--color-gold);
  background: rgba(255, 215, 0, 0.08);
  border-color: var(--color-gold);
  box-shadow: 0 0 18px rgba(255, 215, 0, 0.2);
}

.btn-recover {
  background: var(--color-green);
  color: #000;
  font-weight: 800;
}

.btn-recover:hover {
  color: #000;
  box-shadow: 0 0 22px rgba(0, 255, 136, 0.45);
  transform: translateY(-2px);
}

.card {
  background: var(--color-card);
  border: 1px solid rgba(230, 194, 0, 0.16);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
  border-color: rgba(106, 13, 173, 0.6);
  box-shadow: 0 8px 32px rgba(106, 13, 173, 0.2);
  transform: translateY(-4px);
}

.card--tilt {
  transform: rotate(-0.8deg);
}

.card--tilt:hover {
  transform: translateY(-4px) rotate(-0.8deg);
}

.breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  margin: 0;
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-silver);
  font-size: 14px;
}

.breadcrumbs li + li::before {
  content: "›";
  color: var(--color-warm-gold);
  font-weight: 700;
}

.breadcrumbs a {
  color: var(--color-gold);
}

.breadcrumbs-current {
  color: var(--color-silver);
}

.grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.meta-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  color: var(--color-silver);
  font-size: 13px;
}

.timestamp {
  color: var(--color-gold);
  font-variant-numeric: tabular-nums;
}

.section-group {
  padding: 60px 0;
}

.section-no {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 56px;
  font-weight: 900;
  line-height: 1;
  color: var(--color-purple);
  text-shadow: 0 0 18px rgba(106, 13, 173, 0.7), 0 0 30px rgba(255, 215, 0, 0.2);
  padding-bottom: 6px;
  margin-bottom: 20px;
  border-bottom: 2px solid rgba(230, 194, 0, 0.45);
}

.frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, rgba(106, 13, 173, 0.32), rgba(18, 18, 18, 0.88)), var(--color-card);
  border: 1px solid rgba(230, 194, 0, 0.22);
}

.frame--portrait {
  aspect-ratio: 3 / 4;
}

.frame--tilt {
  transform: rotate(-1.5deg);
}

.frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.tabs[data-tabs] {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.tabs .tab-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tabs [data-tab-button] {
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(230, 194, 0, 0.35);
  background: transparent;
  color: var(--color-silver);
  font-size: 14px;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.tabs [data-tab-button]:hover {
  color: var(--color-gold);
  border-color: var(--color-gold);
}

.tabs [data-tab-button][aria-selected="true"] {
  background: linear-gradient(135deg, var(--color-purple), var(--color-gold));
  color: var(--color-black);
  border-color: transparent;
  box-shadow: 0 0 16px rgba(106, 13, 173, 0.4);
}

.tabs [data-tab-panel] {
  display: none;
}

.tabs [data-tab-panel][data-open="true"] {
  display: block;
}

.accordion[data-accordion] {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.accordion-item {
  background: var(--color-card);
  border: 1px solid rgba(230, 194, 0, 0.16);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.accordion-item.is-open {
  border-color: rgba(106, 13, 173, 0.55);
  box-shadow: 0 0 18px rgba(106, 13, 173, 0.18);
}

.accordion-toggle {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  text-align: left;
  color: var(--color-white);
  font-size: 15px;
  font-weight: 600;
}

.accordion-toggle::after {
  content: "+";
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(106, 13, 173, 0.3);
  color: var(--color-gold);
  font-size: 18px;
  transition: transform var(--transition-base), background var(--transition-base);
}

.accordion-item.is-open .accordion-toggle::after {
  transform: rotate(45deg);
  background: rgba(0, 255, 136, 0.15);
  color: var(--color-green);
}

.accordion-panel {
  max-height: 0;
  overflow: hidden;
  padding: 0 20px;
  color: var(--color-silver);
  transition: max-height var(--transition-slow), padding var(--transition-base);
}

.accordion-item.is-open .accordion-panel {
  max-height: 480px;
  padding: 0 20px 18px;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001s !important;
    transition-duration: 0.001s !important;
    scroll-behavior: auto !important;
  }
}

@media (min-width: 1024px) {
  .nav-toggle {
    display: none;
  }

  .site-nav {
    display: block;
  }
}

@media (max-width: 1023px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 90;
    background: rgba(13, 13, 13, 0.98);
    padding: 20px 24px 24px;
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
    border-bottom: 1px solid rgba(106, 13, 173, 0.6);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.55);
  }

  .site-nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .site-nav .nav-list {
    flex-direction: column;
    align-items: stretch;
    margin: 0;
  }

  .nav-list a {
    border-radius: 14px;
    padding: 14px 16px;
    font-size: 16px;
    border: 1px solid transparent;
  }

  .nav-list a:hover {
    background: rgba(106, 13, 173, 0.28);
    border-color: rgba(106, 13, 173, 0.45);
  }

  .nav-list [aria-current="page"] {
    background: linear-gradient(135deg, var(--color-purple) 10%, var(--color-gold) 100%);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 767px) {
  .header-meta {
    font-size: 11px;
    gap: 8px;
    padding: 4px 12px;
  }

  .header-container {
    min-height: 64px;
  }

  .brand-symbol {
    width: 36px;
    height: 36px;
    font-size: 18px;
    border-radius: 12px;
  }

  .brand-title {
    font-size: 17px;
  }

  .brand-subtitle {
    font-size: 9px;
    letter-spacing: 0.12em;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-top: 40px;
    padding-bottom: 36px;
  }

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

  .to-top {
    right: 14px;
    bottom: 14px;
    padding: 8px 14px;
    font-size: 12px;
  }

  .section-no {
    font-size: 42px;
  }
}