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

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

body {
  margin: 0;
  min-height: 100vh;
}

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

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

button {
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
}

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

p,
h1,
h2,
h3,
h4,
h5,
h6,
ul,
ol,
dl,
dd,
figure,
blockquote,
fieldset {
  margin: 0;
  padding: 0;
}

ul[class],
ol[class] {
  list-style: none;
}

/* ==== TOKENS ==== */
:root {
  --bg-main: #0a0a0f;
  --bg-card: #1a1a24;
  --bg-deep: #07070c;
  --accent-pink: #ff2d78;
  --accent-cyan: #00e5ff;
  --accent-gold: #ffd700;
  --text-main: #f5f5fa;
  --text-dim: #b0b0c0;
  --border-glow: rgba(255, 45, 120, 0.4);
  --danger: #ff4747;
  --font-body: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "Cascadia Mono", "SF Mono", "JetBrains Mono", Consolas, "Noto Sans Mono CJK SC", monospace;
  --radius: 6px;
  --max-width: 1280px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ==== BASE ==== */
body {
  background-color: var(--bg-main);
  background-image:
    linear-gradient(rgba(0, 229, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 45, 120, 0.035) 1px, transparent 1px);
  background-size: 56px 56px;
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: 0.04em;
  color: var(--text-main);
}

h1 {
  font-size: clamp(2.75rem, 6vw, 5rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
  font-size: 1.375rem;
}

h4 {
  font-size: 1rem;
}

a {
  color: var(--accent-cyan);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

::selection {
  background: var(--accent-pink);
  color: #fff;
}

[id] {
  scroll-margin-top: calc(4.5rem + 1rem);
}

:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 3px;
  box-shadow: 0 0 0 6px rgba(0, 229, 255, 0.18);
  border-radius: 2px;
}

/* ==== ACCESSIBILITY ==== */
.skip-link {
  position: fixed;
  top: -4rem;
  left: 1rem;
  z-index: 3000;
  padding: 0.75rem 1.5rem;
  background: var(--accent-pink);
  color: #fff;
  font-weight: 800;
  border-radius: 0 0 6px 6px;
  box-shadow: 0 0 24px rgba(255, 45, 120, 0.6);
  transition: top 0.25s var(--ease-out);
  text-decoration: none;
}

.skip-link:focus {
  top: 0;
}

.skip-link:hover {
  text-decoration: none;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ==== SCROLL PROGRESS ==== */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  z-index: 2000;
  background: linear-gradient(90deg, var(--accent-pink), var(--accent-gold));
  box-shadow: 0 0 12px var(--accent-cyan), 0 0 24px rgba(0, 229, 255, 0.4);
  pointer-events: none;
}

/* ==== HEADER ==== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 120;
  padding: 1.375rem 0;
  background: rgba(10, 10, 15, 0.55);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid transparent;
  transition: padding 0.3s var(--ease-out), background 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--accent-pink), transparent 35%, transparent 65%, var(--accent-cyan));
  opacity: 0;
  transition: opacity 0.3s;
}

.site-header.is-scrolled {
  padding: 0.625rem 0;
  background: rgba(10, 10, 15, 0.92);
  border-bottom-color: var(--border-glow);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.45);
}

.site-header.is-scrolled::after {
  opacity: 1;
}

.container {
  width: min(92%, var(--max-width));
  margin-inline: auto;
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 2rem;
}

/* ==== BRAND ==== */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-main);
  flex-shrink: 0;
}

.brand:hover {
  text-decoration: none;
}

.brand-sigil {
  width: 2.625rem;
  height: 2.625rem;
  display: grid;
  place-items: center;
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--accent-pink);
  background: var(--bg-card);
  border: 2px solid var(--accent-pink);
  box-shadow: 0 0 14px rgba(255, 45, 120, 0.55), inset 0 0 8px rgba(255, 45, 120, 0.25);
  transform: rotate(-8deg);
  transition: width 0.3s, height 0.3s, font-size 0.3s;
  line-height: 1;
}

.brand-name-wrap {
  min-width: 0;
}

.brand-name {
  display: block;
  font-size: 1.375rem;
  font-weight: 900;
  letter-spacing: 0.22em;
  line-height: 1.1;
  color: var(--text-main);
  text-shadow: 0 0 10px rgba(255, 45, 120, 0.9), 0 0 24px rgba(255, 45, 120, 0.45);
  transition: font-size 0.3s;
}

.brand-cn {
  display: block;
  margin-top: 0.2rem;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.42em;
  color: var(--accent-cyan);
  text-transform: uppercase;
  white-space: nowrap;
}

.site-header.is-scrolled .brand-sigil {
  width: 2.125rem;
  height: 2.125rem;
  font-size: 1rem;
}

.site-header.is-scrolled .brand-name {
  font-size: 1.125rem;
}

/* ==== NAVIGATION ==== */
.site-nav {
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 1.75rem);
}

.nav-link {
  position: relative;
  padding: 0.4rem 0.1rem;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s, text-shadow 0.2s;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--accent-pink);
  box-shadow: 0 0 8px var(--accent-pink);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s var(--ease-out);
}

.nav-link:hover {
  color: var(--text-main);
  text-decoration: none;
  text-shadow: 0 0 12px rgba(0, 229, 255, 0.55);
}

.nav-link:hover::after {
  transform: scaleX(0.45);
}

.nav-link[aria-current="page"] {
  color: var(--text-main);
  text-shadow: 0 0 12px rgba(255, 45, 120, 0.65);
}

.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
}

/* Nav toggle */
.nav-toggle {
  display: none;
}

.nav-backdrop {
  display: none;
}

/* ==== FOOTER ==== */
.site-footer {
  position: relative;
  margin-top: 5rem;
  padding-top: 3.5rem;
  background: var(--bg-deep);
  border-top: 1px solid var(--border-glow);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-pink) 20%, var(--accent-cyan) 50%, var(--accent-gold) 80%, transparent);
  opacity: 0.7;
}

.site-footer::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-pink), var(--accent-cyan));
  opacity: 0.25;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.3fr;
  gap: 2.5rem;
  padding-bottom: 2.75rem;
}

.footer-brand-name {
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: 0.16em;
  color: var(--text-main);
  text-shadow: 0 0 16px rgba(255, 45, 120, 0.85), 0 0 42px rgba(255, 45, 120, 0.4);
  line-height: 1.1;
}

.footer-brand-tagline {
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.36em;
  color: var(--accent-cyan);
  text-transform: uppercase;
}

.footer-brand-desc {
  margin-top: 1rem;
  max-width: 34ch;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--text-dim);
}

.footer-col-title {
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent-gold);
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(255, 215, 0, 0.25);
}

.footer-link-list {
  display: grid;
  gap: 0.65rem;
}

.footer-link-list a {
  color: var(--text-dim);
  font-size: 0.875rem;
  letter-spacing: 0.06em;
  transition: color 0.2s, padding-left 0.2s, text-shadow 0.2s;
}

.footer-link-list a:hover {
  color: var(--accent-cyan);
  text-decoration: none;
  padding-left: 0.5rem;
  text-shadow: 0 0 12px rgba(0, 229, 255, 0.55);
}

.footer-contact-col {
  border-left: 1px solid rgba(0, 229, 255, 0.12);
  padding-left: 1.5rem;
}

.footer-contact-list {
  display: grid;
  gap: 0.75rem;
}

.footer-contact-list li {
  display: grid;
  grid-template-columns: 4.2rem 1fr;
  gap: 0.75rem;
  align-items: baseline;
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--accent-pink);
  white-space: nowrap;
}

.contact-value {
  font-size: 0.85rem;
  color: var(--text-dim);
  line-height: 1.5;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding: 1.4rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.8rem;
  color: var(--text-dim);
  letter-spacing: 0.04em;
}

.footer-copy {
  margin: 0;
}

.footer-icp {
  font-family: var(--font-mono);
  color: rgba(176, 176, 192, 0.75);
  margin: 0;
}

/* ==== PAGE UTILITIES ==== */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0 0 1.75rem;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

.breadcrumbs li {
  color: var(--text-dim);
}

.breadcrumbs li + li::before {
  content: "/";
  margin-right: 0.4rem;
  color: rgba(176, 176, 192, 0.45);
}

.breadcrumbs a {
  color: var(--accent-cyan);
  text-decoration: none;
}

.breadcrumbs a:hover {
  color: var(--text-main);
  text-shadow: 0 0 10px rgba(0, 229, 255, 0.6);
}

.breadcrumbs [aria-current="page"] {
  color: var(--accent-gold);
}

.page-head {
  padding: clamp(7.5rem, 12vh, 10rem) 0 2.5rem;
}

.page-title {
  margin-top: 0.5rem;
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 1.04;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.page-subtitle {
  margin-top: 1rem;
  max-width: 60ch;
  font-size: 1rem;
  color: var(--text-dim);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--accent-cyan);
}

.section-label::before {
  content: "//";
  color: var(--accent-pink);
}

.prose {
  max-width: 68ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text-dim);
}

.prose > * + * {
  margin-top: 1.25em;
}

.prose strong {
  color: var(--text-main);
}

.prose em {
  color: var(--accent-cyan);
  font-style: normal;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

/* ==== BUTTONS ==== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.8rem 1.8rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.25s var(--ease-out), box-shadow 0.25s, background-color 0.25s, border-color 0.25s;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--accent-pink);
  color: #fff;
  box-shadow: 0 0 18px rgba(255, 45, 120, 0.35);
}

.btn-primary:hover {
  background: #ff4789;
  box-shadow: 0 0 30px rgba(255, 45, 120, 0.75);
}

.btn-ghost {
  background: transparent;
  color: var(--accent-cyan);
  border: 1px solid var(--accent-cyan);
  box-shadow: 0 0 10px rgba(0, 229, 255, 0.12);
}

.btn-ghost:hover {
  background: rgba(0, 229, 255, 0.08);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 22px rgba(0, 229, 255, 0.45);
}

.btn-gold {
  background: transparent;
  color: var(--accent-gold);
  border: 1px solid var(--accent-gold);
  box-shadow: 0 0 10px rgba(255, 215, 0, 0.12);
}

.btn-gold:hover {
  background: rgba(255, 215, 0, 0.08);
  border-color: var(--accent-gold);
  box-shadow: 0 0 22px rgba(255, 215, 0, 0.4);
}

/* ==== CARDS ==== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
  gap: 1.5rem;
}

.data-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s;
}

.data-card::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 3px;
  height: 40px;
  background: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
  opacity: 0.6;
}

.data-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 0 26px rgba(255, 45, 120, 0.18), 0 12px 24px rgba(0, 0, 0, 0.35);
}

.data-card-index {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  color: var(--accent-gold);
}

.data-card-title {
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--text-main);
}

.data-card-desc {
  font-size: 0.875rem;
  color: var(--text-dim);
}

/* ==== PANEL / BADGE / DIVIDER ==== */
.status-panel {
  background: linear-gradient(165deg, var(--bg-card), #12121d);
  border: 1px solid var(--border-glow);
  border-radius: 10px;
  padding: 1.5rem;
  box-shadow: inset 0 0 42px rgba(255, 45, 120, 0.05), 0 8px 30px rgba(0, 0, 0, 0.3);
}

.tilt-badge {
  display: inline-block;
  transform: rotate(-5deg);
  padding: 0.3rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  color: var(--accent-gold);
  border: 1px dashed rgba(255, 215, 0, 0.65);
}

.divider-neon {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, var(--accent-pink), transparent 70%);
  margin: 2.5rem 0;
}

.divider-neon--cyan {
  background: linear-gradient(90deg, var(--accent-cyan), transparent 70%);
}

/* ==== IMAGE FRAME ==== */
.img-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background:
    radial-gradient(circle at 20% 20%, rgba(255, 45, 120, 0.12), transparent 45%),
    radial-gradient(circle at 80% 75%, rgba(0, 229, 255, 0.12), transparent 45%),
    var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius);
  overflow: hidden;
}

.img-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(120deg, transparent 30%, rgba(0, 229, 255, 0.08) 50%, transparent 70%);
  background-size: 200% 200%;
  animation: shimmer 3.2s linear infinite;
}

.img-frame::after {
  content: "NEON IMG";
  position: absolute;
  right: 0.8rem;
  bottom: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.3em;
  color: rgba(176, 176, 192, 0.55);
}

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

.img-frame--wide {
  aspect-ratio: 21 / 9;
}

@keyframes shimmer {
  from {
    background-position: 200% 0;
  }
  to {
    background-position: -200% 0;
  }
}

/* ==== HIGHLIGHT TEXT ==== */
.neon-text {
  color: var(--accent-pink);
  text-shadow: 0 0 8px rgba(255, 45, 120, 0.8), 0 0 28px rgba(255, 45, 120, 0.45);
}

.gold-text {
  color: var(--accent-gold);
  text-shadow: 0 0 8px rgba(255, 215, 0, 0.6), 0 0 22px rgba(255, 215, 0, 0.3);
}

/* ==== RESPONSIVE ==== */
@media (max-width: 1023px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .two-col {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 767px) {
  .nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 48px;
    height: 48px;
    margin-left: auto;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 4px;
    background: rgba(26, 26, 36, 0.7);
    transition: border-color 0.25s, box-shadow 0.25s;
  }

  .nav-toggle:hover {
    border-color: var(--accent-pink);
    box-shadow: 0 0 14px rgba(255, 45, 120, 0.35);
  }

  .nav-toggle-bar {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-main);
    border-radius: 1px;
    transition: transform 0.3s var(--ease-out), opacity 0.2s, background 0.2s;
  }

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

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

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

  .site-nav {
    display: block;
    position: absolute;
    top: 0;
    right: 0;
    height: 100vh;
    width: min(320px, 86vw);
    padding: 6rem 1.75rem 2.5rem;
    background: rgba(10, 10, 15, 0.98);
    border-left: 1px solid var(--accent-pink);
    box-shadow: -12px 0 42px rgba(0, 0, 0, 0.6);
    margin-left: 0;
    overflow-y: auto;
    transform: translateX(102%);
    visibility: hidden;
    transition: transform 0.34s var(--ease-out), visibility 0.34s;
  }

  .site-nav[data-open] {
    transform: translateX(0);
    visibility: visible;
  }

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

  .nav-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  }

  .nav-item:first-child {
    border-top: 1px solid rgba(255, 255, 255, 0.07);
  }

  .nav-link {
    display: block;
    padding: 1rem 0.25rem;
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.14em;
  }

  .nav-link::after {
    display: none;
  }

  .nav-link[aria-current="page"] {
    color: var(--accent-pink);
    padding-left: 0.75rem;
    border-left: 3px solid var(--accent-pink);
  }

  .nav-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 110;
    background: rgba(0, 0, 0, 0.62);
    -webkit-backdrop-filter: blur(3px);
    backdrop-filter: blur(3px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
  }

  .nav-backdrop[data-open] {
    opacity: 1;
    visibility: visible;
  }

  .site-footer {
    margin-top: 3rem;
    padding-top: 2.5rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding-bottom: 2rem;
  }

  .footer-contact-col {
    border-left: 0;
    padding-left: 0;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .page-head {
    padding-top: 7.5rem;
  }
}

/* ==== REDUCED MOTION ==== */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .scroll-progress {
    transition: none;
  }
}

/* ==== SCROLL LOCK ==== */
body.no-scroll {
  overflow: hidden;
}