/* ========== 1. Reset ========== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ========== 2. Custom Properties ========== */
:root {
  --bg-deep: #0A1628;
  --bg-panel: #1D3557;
  --bg-elevated: #16283F;
  --accent: #00E676;
  --accent-orange: #FF6D00;
  --accent-amber: #FFD54F;
  --text-primary: #FFFFFF;
  --text-soft: #B0BEC5;
  --line-subtle: rgba(176, 190, 197, 0.2);
  --font-display: 'Archivo Black', 'Arial Black', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --container-w: 1280px;
  --container-pad: clamp(16px, 4vw, 40px);
  --header-z: 1000;
  --speed-fast: 0.18s ease;
  --speed-med: 0.32s ease;
}

/* ========== 3. Base Elements ========== */
html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  font-weight: 400;
  color: var(--text-primary);
  background-color: var(--bg-deep);
  min-height: 100vh;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 900;
  font-style: italic;
  line-height: 1.15;
  color: var(--text-primary);
  text-wrap: balance;
}

p {
  margin-bottom: 1rem;
  text-wrap: pretty;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--speed-fast);
}

a:hover {
  color: var(--text-primary);
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

button {
  font-family: inherit;
  cursor: pointer;
}

/* ========== 4. Utilities ========== */
.container {
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.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;
}

#main-content {
  scroll-margin-top: 90px;
  outline: none;
}

/* ========== 5. Focus & Accessibility ========== */
:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 0;
  left: 1rem;
  transform: translateY(-100%);
  z-index: calc(var(--header-z) + 10);
  background-color: var(--accent);
  color: var(--bg-deep);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 700;
  line-height: 1;
  padding: 0.75rem 1.5rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.45);
  transition: transform var(--speed-med);
}

.skip-link:focus {
  transform: translateY(0);
  outline: 3px solid var(--accent-amber);
  outline-offset: 0;
  color: var(--bg-deep);
}

/* ========== 6. Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.6rem;
  border: 2px solid var(--accent);
  background-color: var(--accent);
  color: var(--bg-deep);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--speed-fast), color var(--speed-fast), border-color var(--speed-fast);
}

.btn:hover {
  background-color: transparent;
  color: var(--accent);
}

.btn-ghost {
  background-color: transparent;
  color: var(--accent);
}

.btn-ghost:hover {
  background-color: var(--accent);
  color: var(--bg-deep);
}

.btn-warm {
  border-color: var(--accent-orange);
  background-color: var(--accent-orange);
  color: var(--bg-deep);
}

.btn-warm:hover {
  background-color: transparent;
  color: var(--accent-orange);
}

/* ========== 7. Header ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--header-z);
  background-color: var(--bg-deep);
  border-bottom: 1px solid var(--line-subtle);
}

.header-inner {
  position: relative;
  display: flex;
  flex-direction: column;
}

/* Scroll progress */
.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background-color: transparent;
  pointer-events: none;
  z-index: 5;
}

.scroll-progress-bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-orange));
  will-change: width;
}

/* Masthead */
.masthead {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  padding-top: 1rem;
  padding-bottom: 0.5rem;
}

.masthead-side {
  display: flex;
  align-items: center;
  min-width: 0;
}

.masthead-left {
  justify-content: flex-start;
}

.masthead-right {
  justify-content: flex-end;
  gap: 0.75rem;
}

/* Brand */
.brand {
  display: inline-flex;
  align-items: center;
  line-height: 0;
  justify-self: center;
}

.brand-logo {
  display: block;
  width: clamp(150px, 19vw, 190px);
  height: auto;
}

/* Round badge */
.round-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.9rem;
  background-color: var(--bg-panel);
  border-left: 3px solid var(--accent);
  color: var(--text-soft);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  white-space: nowrap;
}

.round-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent);
  box-shadow: 0 0 8px rgba(0, 230, 118, 0.6);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.4;
    transform: scale(0.75);
  }
}

/* Nav CTA */
.btn-nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.55rem 1.4rem;
  background-color: var(--accent);
  color: var(--bg-deep);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
  border: 2px solid var(--accent);
  position: relative;
  overflow: hidden;
  text-decoration: none;
  transition: background-color var(--speed-fast), color var(--speed-fast), border-color var(--speed-fast);
}

.btn-nav-cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: -80%;
  width: 50%;
  height: 100%;
  background: linear-gradient(105deg, transparent, rgba(255, 255, 255, 0.35), transparent);
  transform: skewX(-24deg);
  transition: left 0.45s ease;
  pointer-events: none;
}

.btn-nav-cta:hover {
  background-color: transparent;
  color: var(--accent);
}

.btn-nav-cta:hover::before {
  left: 120%;
}

/* Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background-color: transparent;
  border: 1px solid var(--line-subtle);
  cursor: pointer;
}

.toggle-bar {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--text-primary);
  transition: transform var(--speed-fast), opacity var(--speed-fast), background-color var(--speed-fast);
}

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

.nav-toggle.is-active .toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.is-active .toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-active .toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Site Nav */
.site-nav {
  border-top: 1px solid var(--line-subtle);
}

.nav-list {
  display: flex;
  justify-content: center;
  align-items: stretch;
}

.nav-link {
  display: block;
  position: relative;
  padding: 0.85rem 1.6rem;
  color: var(--text-soft);
  font-size: 0.925rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: color var(--speed-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent);
  transform: scaleX(0) skewX(-30deg);
  transform-origin: left;
  transition: transform var(--speed-med);
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-link:hover::after {
  transform: scaleX(1) skewX(-30deg);
}

.nav-link[aria-current="page"] {
  color: var(--accent);
  font-weight: 700;
}

.nav-link[aria-current="page"]::after {
  transform: scaleX(1) skewX(-30deg);
  background-color: var(--accent);
}

.nav-link[aria-current="page"]::before {
  content: '';
  position: absolute;
  top: 12px;
  right: 8px;
  width: 5px;
  height: 5px;
  background-color: var(--accent-orange);
  transform: rotate(45deg);
}

.nav-item-cta-mobile {
  display: none;
}

.btn-nav-cta-mobile {
  width: 100%;
}

/* ========== 8. Footer ========== */
.site-footer {
  position: relative;
  background-color: var(--bg-deep);
  border-top: 1px solid var(--line-subtle);
  margin-top: 4rem;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -2px;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent) 70%, var(--accent-orange) 70%, var(--accent-orange) 100%);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.6fr;
  gap: 2.5rem;
  padding: 3rem 0 2.5rem;
}

.footer-logo-svg {
  display: block;
  width: 150px;
  height: auto;
}

.footer-tagline {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: 1.1rem;
  color: var(--accent);
  margin-top: 0.75rem;
  letter-spacing: 0.02em;
}

.footer-trust {
  margin-top: 0.75rem;
  font-size: 0.875rem;
  color: var(--text-soft);
  max-width: 34em;
  line-height: 1.7;
}

.footer-col {
  min-width: 0;
}

.footer-heading {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 700;
  font-style: italic;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-primary);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent);
}

.footer-list li {
  margin-bottom: 0.5rem;
}

.footer-list a {
  display: inline-block;
  padding: 0.15rem 0;
  color: var(--text-soft);
  font-size: 0.9rem;
  transition: color var(--speed-fast), padding-left var(--speed-fast);
}

.footer-list a:hover {
  color: var(--accent);
  padding-left: 0.35rem;
}

.footer-contact-list li {
  margin-bottom: 0.6rem;
}

.footer-contact-item {
  display: flex;
  gap: 0.75rem;
  font-size: 0.85rem;
  line-height: 1.5;
}

.contact-label {
  flex-shrink: 0;
  min-width: 2.5em;
  color: var(--accent);
  font-weight: 600;
}

.contact-value {
  color: var(--text-soft);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  border-top: 1px solid var(--line-subtle);
  padding: 1.25rem 0;
}

.footer-bottom p {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-soft);
}

.footer-icp {
  font-variant-numeric: tabular-nums;
}

/* ========== 9. Breadcrumbs ========== */
.breadcrumbs {
  padding: 1.25rem 0 0.5rem;
  font-size: 0.85rem;
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--text-soft);
}

.breadcrumb-item:not(:last-child)::after {
  content: '/';
  color: var(--accent);
  opacity: 0.6;
  margin-left: 0.35rem;
}

.breadcrumb-item a {
  color: var(--text-soft);
  transition: color var(--speed-fast);
}

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

.breadcrumb-item[aria-current="page"] {
  color: var(--text-primary);
  font-weight: 600;
}

/* ========== 10. Content & Sections ========== */
.content-container {
  max-width: 46rem;
  margin-inline: auto;
  padding: 2rem var(--container-pad) 4rem;
}

.section {
  padding-block: 2.5rem;
}

.section + .section {
  border-top: 1px solid var(--line-subtle);
}

.section-heading {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: 1.75rem;
  margin-bottom: 1rem;
  padding-left: 0.85rem;
  position: relative;
}

.section-heading::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.2em;
  bottom: 0.2em;
  width: 4px;
  background-color: var(--accent);
  transform: skewY(-8deg);
}

.lead-text {
  font-size: 1.25rem;
  line-height: 1.6;
  color: var(--text-soft);
}

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

.text-warm {
  color: var(--accent-orange);
}

.divider {
  border: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--line-subtle) 100%);
  margin: 2.5rem 0;
}

/* ========== 11. Grids & Cards ========== */
.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-2 {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  background-color: var(--bg-panel);
  border: 1px solid var(--line-subtle);
  padding: 1.5rem;
  transition: transform var(--speed-med), box-shadow var(--speed-med), border-color var(--speed-med);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
  border-color: rgba(0, 230, 118, 0.4);
}

/* ========== 12. Tags ========== */
.tag {
  display: inline-block;
  padding: 0.2rem 0.7rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  background-color: var(--bg-panel);
  color: var(--text-soft);
  border: 1px solid var(--line-subtle);
}

.tag-hot {
  background-color: var(--accent-orange);
  color: var(--bg-deep);
  border-color: var(--accent-orange);
}

.tag-new {
  background-color: var(--accent);
  color: var(--bg-deep);
  border-color: var(--accent);
}

/* ========== 13. Image Frames ========== */
.image-frame {
  position: relative;
  overflow: hidden;
  background-color: var(--bg-panel);
  border: 1px solid var(--line-subtle);
}

.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--speed-med);
}

.image-frame:hover img {
  transform: scale(1.03);
}

.image-frame--wide {
  aspect-ratio: 16 / 9;
}

.image-frame--square {
  aspect-ratio: 1 / 1;
}

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

/* ========== 14. Reveal Animation ========== */
.reveal-init {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-init.is-revealed {
  opacity: 1;
  transform: none;
}

/* ========== 15. Responsive ========== */
@media (min-width: 768px) and (max-width: 1024px) {
  .nav-link {
    padding: 0.8rem 0.9rem;
    font-size: 0.85rem;
  }

  .round-badge {
    font-size: 0.65rem;
    padding: 0.3rem 0.6rem;
  }

  .btn-nav-cta {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
  }

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

@media (max-width: 767px) {
  .site-header {
    position: sticky;
  }

  .masthead {
    grid-template-columns: 1fr auto;
    padding: 0.75rem 0;
  }

  .masthead-left {
    display: none;
  }

  .brand {
    justify-self: start;
    grid-column: 1;
  }

  .brand-logo {
    width: 130px;
  }

  .masthead-right {
    grid-column: 2;
  }

  .btn-nav-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    display: none;
  }

  .site-nav[data-open="true"] {
    display: block;
  }

  .nav-list {
    flex-direction: column;
    padding-bottom: 0.5rem;
  }

  .nav-link {
    padding: 0.8rem 1rem;
    border-left: 3px solid transparent;
  }

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

  .nav-link[aria-current="page"] {
    border-left-color: var(--accent);
    background-color: var(--bg-panel);
  }

  .nav-link[aria-current="page"]::before {
    display: none;
  }

  .nav-item-cta-mobile {
    display: block;
    padding: 0.75rem 1rem 0.25rem;
  }

  .btn-nav-cta-mobile {
    display: inline-flex;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding: 2.5rem 0 2rem;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    padding: 1.25rem 0 1.5rem;
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .section-heading {
    font-size: 1.4rem;
  }

  .lead-text {
    font-size: 1.075rem;
  }
}

/* ========== 16. 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;
    transition-delay: 0ms !important;
  }

  .round-badge-dot {
    animation: none;
  }

  .reveal-init {
    opacity: 1;
    transform: none;
    transition: none;
  }
}