:root {
  --clr-deep-space: #0A1128;
  --clr-deep-slate: #102A43;
  --clr-neon-green: #39FF14;
  --clr-orange-red: #FF5A3C;
  --clr-electric-blue: #1E90FF;
  --clr-violet: #9B5DE5;
  --clr-light-gray: #F0F4F8;
  --clr-white: #FFFFFF;
  --font-headline: "Russo One", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --container-max: 1440px;
  --container-pad: clamp(1rem, 4vw, 2.5rem);
  --header-sticky-height: 76px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-card: 0 12px 30px rgba(0, 0, 0, 0.3);
  --transition-base: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

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

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--clr-white);
  background-color: var(--clr-deep-space);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul,
ol {
  list-style: none;
}

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

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-headline);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.01em;
}

:focus-visible {
  outline: 2px solid var(--clr-neon-green);
  outline-offset: 3px;
}

#main-content {
  background: var(--clr-light-gray);
  color: var(--clr-deep-space);
  min-height: 70vh;
}

#main-content p {
  margin-bottom: 1rem;
  line-height: 1.85;
  color: rgba(10, 17, 40, 0.82);
}

#main-content h1,
#main-content h2,
#main-content h3,
#main-content h4 {
  color: var(--clr-deep-space);
}

#main-content a:not([class]) {
  color: var(--clr-electric-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s ease;
}

#main-content a:not([class]):hover {
  color: var(--clr-violet);
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

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

.skip-link {
  position: fixed;
  top: -100px;
  left: 1rem;
  z-index: 9999;
  background: var(--clr-neon-green);
  color: var(--clr-deep-space);
  padding: 0.625rem 1.25rem;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(57, 255, 20, 0.35);
  transition: top 0.2s ease;
}

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 9999;
  width: 100%;
  height: 3px;
  pointer-events: none;
  background: rgba(255, 255, 255, 0.06);
}

.scroll-progress::before {
  content: "";
  display: block;
  height: 100%;
  width: var(--scroll-progress, 0%);
  background: linear-gradient(90deg, var(--clr-neon-green), var(--clr-orange-red));
  box-shadow: 0 0 12px rgba(57, 255, 20, 0.45);
  transition: width 0.1s linear;
}

.site-header {
  position: relative;
  z-index: 1000;
}

.header-meta {
  background: var(--clr-deep-space);
  border-bottom: 1px solid rgba(57, 255, 20, 0.18);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
}

.header-meta__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-top: 0.4rem;
  padding-bottom: 0.4rem;
}

.header-meta__tagline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: rgba(240, 244, 248, 0.72);
}

.header-meta__tagline::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clr-neon-green);
  box-shadow: 0 0 8px rgba(57, 255, 20, 0.65);
}

.header-meta__phone {
  color: var(--clr-neon-green);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

.header-main {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10, 17, 40, 0.92);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(57, 255, 20, 0.14);
}

.header-main::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--clr-neon-green) 0%, var(--clr-orange-red) 70%, transparent 100%);
  transform: skewX(-20deg);
  transform-origin: left;
  pointer-events: none;
}

.header-main__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header-sticky-height);
}

.brand {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  color: var(--clr-white);
  font-family: var(--font-headline);
  line-height: 1.1;
}

.brand__text {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand__accent {
  color: var(--clr-neon-green);
}

.brand__line {
  width: 100%;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--clr-neon-green), var(--clr-orange-red));
}

.brand--footer .brand__text {
  font-size: 1.375rem;
}

.brand--footer .brand__line {
  height: 2px;
}

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

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-item {
  position: relative;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 0.625rem 0.875rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(240, 244, 248, 0.85);
  border-radius: var(--radius-sm);
  transition: color 0.25s ease, background-color 0.25s ease;
}

.nav-link:hover,
.nav-link:focus {
  color: var(--clr-white);
  background: rgba(255, 255, 255, 0.06);
}

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

.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0.75rem;
  right: 0.75rem;
  bottom: 0.25rem;
  height: 2px;
  background: var(--clr-neon-green);
  box-shadow: 0 0 8px rgba(57, 255, 20, 0.6);
}

.nav-link.is-active {
  color: var(--clr-neon-green);
  font-weight: 700;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 11px 10px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-sm);
  cursor: pointer;
  position: relative;
  z-index: 2200;
  transition: border-color 0.25s ease;
}

.nav-toggle:hover {
  border-color: var(--clr-neon-green);
}

.nav-toggle__bar {
  display: block;
  height: 2px;
  width: 100%;
  border-radius: 2px;
  background: var(--clr-white);
  transition: transform 0.3s ease, opacity 0.3s ease, background-color 0.3s ease;
}

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

.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(--clr-neon-green);
}

.site-footer {
  position: relative;
  background: var(--clr-deep-space);
  color: var(--clr-white);
  padding: 4rem 0 0;
  overflow: hidden;
  border-top: 1px solid rgba(57, 255, 20, 0.16);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--clr-neon-green), var(--clr-electric-blue), var(--clr-orange-red));
}

.site-footer::after {
  content: "BALLBET";
  position: absolute;
  right: -1rem;
  bottom: 0.25rem;
  font-family: var(--font-headline);
  font-size: clamp(5rem, 12vw, 8rem);
  line-height: 0.8;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.03);
  pointer-events: none;
  letter-spacing: 0.02em;
  user-select: none;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 3rem;
  padding-bottom: 3rem;
}

.footer-heading {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--clr-neon-green);
  margin-bottom: 1.25rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.footer-brand__desc {
  margin-top: 1.25rem;
  font-size: 0.875rem;
  color: rgba(240, 244, 248, 0.65);
  max-width: 34ch;
  line-height: 1.8;
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.footer-list--plain {
  gap: 0.5rem;
  font-size: 0.875rem;
  color: rgba(240, 244, 248, 0.7);
  line-height: 1.8;
}

.footer-link {
  color: rgba(240, 244, 248, 0.7);
  font-size: 0.875rem;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  transition: color 0.25s ease, padding-left 0.25s ease;
}

.footer-link:hover {
  color: var(--clr-white);
  padding-left: 4px;
}

.footer-bottom {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.8125rem;
  color: rgba(240, 244, 248, 0.6);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-headline);
  font-size: 0.9375rem;
  font-weight: 700;
  line-height: 1.4;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease, border-color 0.25s ease;
}

.btn-primary {
  background: var(--clr-neon-green);
  color: var(--clr-deep-space);
  box-shadow: 0 4px 20px rgba(57, 255, 20, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(57, 255, 20, 0.35);
}

.btn-outline {
  background: transparent;
  color: currentColor;
  border-color: currentColor;
}

.btn-outline:hover {
  background: rgba(57, 255, 20, 0.12);
  border-color: var(--clr-neon-green);
  color: var(--clr-neon-green);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.375rem;
  padding: 0.875rem 0;
  font-size: 0.8125rem;
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
}

.breadcrumb__item:not(:last-child)::after {
  content: "/";
  color: rgba(10, 17, 40, 0.35);
}

.breadcrumb__link {
  color: var(--clr-deep-space);
  opacity: 0.7;
  transition: opacity 0.2s ease;
}

.breadcrumb__link:hover {
  opacity: 1;
}

.breadcrumb__current {
  color: var(--clr-deep-space);
  font-weight: 600;
}

.grid {
  display: grid;
  gap: 1.5rem;
}

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

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

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

.card-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
}

.data-card {
  background: var(--clr-deep-slate);
  color: var(--clr-white);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.data-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

.card__title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--clr-white);
}

.card__desc {
  font-size: 0.875rem;
  color: rgba(240, 244, 248, 0.7);
  margin-top: 0.5rem;
  line-height: 1.7;
}

.price-tag {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  padding: 0.5rem 1.25rem;
  background: rgba(57, 255, 20, 0.12);
  border: 1px solid rgba(57, 255, 20, 0.3);
  border-radius: var(--radius-sm);
  color: var(--clr-neon-green);
}

.price-tag__label {
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(240, 244, 248, 0.6);
}

.price-tag__number {
  font-size: 1.5rem;
  font-weight: 700;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--clr-neon-green);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--clr-electric-blue);
}

.section-label::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--clr-orange-red);
  border-radius: 2px;
}

.section-number {
  font-family: var(--font-headline);
  font-size: clamp(2.5rem, 6vw, 4rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(10, 17, 40, 0.25);
  user-select: none;
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  color: var(--clr-deep-space);
}

.media {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--clr-deep-slate), var(--clr-violet) 85%, var(--clr-deep-space));
  border-radius: var(--radius-md);
}

.media--hero {
  aspect-ratio: 21 / 9;
  border-radius: var(--radius-lg);
}

.media--card {
  aspect-ratio: 4 / 3;
}

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

.media img,
.media picture {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.is-active {
  color: var(--clr-neon-green) !important;
  font-weight: 700;
}

a[href^="#"].is-active {
  color: var(--clr-neon-green);
  font-weight: 700;
}

@media (max-width: 1023.98px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid--3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 899.98px) {
  .header-meta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(82vw, 420px);
    z-index: 2100;
    background: var(--clr-deep-space);
    padding: 5.5rem 1.75rem 2rem;
    flex-direction: column;
    align-items: stretch;
    transform: translateX(102%);
    transition: transform 0.45s cubic-bezier(0.16, 1, 0.3, 1);
    border-left: 2px solid rgba(57, 255, 20, 0.3);
    box-shadow: -20px 0 60px rgba(0, 0, 0, 0.5);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

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

  .site-nav::before {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--clr-orange-red), transparent 65%);
    clip-path: polygon(100% 0, 0 0, 100% 100%);
    opacity: 0.28;
    pointer-events: none;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.125rem;
  }

  .nav-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .nav-link {
    display: block;
    padding: 0.9rem 0.5rem;
    font-size: 1.125rem;
    color: rgba(240, 244, 248, 0.85);
  }

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

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

  body.nav-open {
    overflow: hidden;
    touch-action: none;
  }
}

@media (max-width: 599.98px) {
  .header-main__inner {
    min-height: 64px;
  }

  .brand__text {
    font-size: 1.25rem;
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

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

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

  .media--hero {
    aspect-ratio: 4 / 3;
  }
}

@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;
  }

  .scroll-progress::before {
    transition: none;
  }
}