:root {
  --color-deep-blue: #0B1D3A;
  --color-orange: #FF6B35;
  --color-green: #39FF14;
  --color-carbon: #1A1A1A;
  --color-carbon-light: #2E2E2E;
  --color-white: #FFFFFF;
  --color-light-gray: #D1D5DB;
  --color-purple: #7B2CBF;
  --font-headline: Oswald, Impact, "Arial Narrow", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: Roboto, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --container: 1280px;
  --radius: 12px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-pop: 0 16px 48px rgba(0, 0, 0, 0.5);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-white);
  background-color: var(--color-carbon);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-headline);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-white);
  letter-spacing: 0.02em;
}

h1 {
  font-size: clamp(2.5rem, 5.5vw, 4.5rem);
}

h2 {
  font-size: clamp(1.875rem, 4vw, 3rem);
}

h3 {
  font-size: 1.25rem;
}

p {
  font-size: 1rem;
}

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

::selection {
  background: var(--color-orange);
  color: var(--color-deep-blue);
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

#main-content {
  flex: 1 0 auto;
  display: block;
  width: 100%;
  padding-top: 96px;
  scroll-margin-top: 88px;
  outline: none;
}

.skip-link {
  position: fixed;
  top: -80px;
  left: 16px;
  z-index: 4000;
  display: inline-flex;
  align-items: center;
  padding: 12px 24px;
  background: var(--color-orange);
  color: var(--color-deep-blue);
  font-weight: 700;
  font-size: 14px;
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.45);
  transition: top 0.3s ease;
}

.skip-link:focus {
  top: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: var(--radius-pill);
  border: 2px solid transparent;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.btn--primary {
  background: var(--color-orange);
  color: var(--color-deep-blue);
  border-color: var(--color-orange);
  box-shadow: 0 4px 18px rgba(255, 107, 53, 0.35);
}

.btn--primary:hover {
  background: #E8521F;
  border-color: #E8521F;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(255, 107, 53, 0.45);
}

.btn--ghost {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.32);
}

.btn--ghost:hover {
  border-color: var(--color-orange);
  color: var(--color-orange);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  padding: 0;
  font-size: 14px;
  color: var(--color-light-gray);
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  color: var(--color-light-gray);
  opacity: 0.6;
}

.breadcrumb a {
  color: var(--color-orange);
  font-weight: 500;
  transition: color 0.2s ease;
}

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

.breadcrumb li:last-child {
  font-weight: 700;
  color: var(--color-white);
}

.content {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 24px 48px;
}

.content p {
  margin-bottom: 16px;
  color: var(--color-light-gray);
}

.content h2 {
  margin-top: 40px;
  margin-bottom: 16px;
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.content h3 {
  margin-top: 28px;
  margin-bottom: 12px;
}

.content ul {
  margin-bottom: 16px;
}

.content ul li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 8px;
  color: var(--color-light-gray);
}

.content ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 8px;
  height: 8px;
  background: var(--color-orange);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
}

.page-head {
  position: relative;
  padding: 40px 0 32px;
  margin-bottom: 48px;
  border-bottom: 2px solid rgba(255, 255, 255, 0.08);
}

.page-head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 96px;
  height: 2px;
  background: var(--color-orange);
}

.page-head__title {
  max-width: 960px;
  font-size: clamp(2.5rem, 6vw, 4rem);
  line-height: 1.08;
  margin-bottom: 12px;
  text-transform: uppercase;
}

.page-head__lead {
  max-width: 720px;
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--color-light-gray);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  font-family: var(--font-headline);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--color-green);
}

.section-label::before {
  content: "";
  width: 28px;
  height: 4px;
  background: var(--color-orange);
  transform: skewX(-24deg);
}

.card {
  background: var(--color-carbon-light);
  border: 2px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 24px;
}

.card--accent {
  border-top: 4px solid var(--color-orange);
}

.grid {
  display: grid;
  gap: 24px;
}

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

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

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

.img-frame {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--color-carbon-light);
  border: 2px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
}

.img-frame--16x9 {
  aspect-ratio: 16 / 9;
}

.img-frame--4x3 {
  aspect-ratio: 4 / 3;
}

.img-frame--1x1 {
  aspect-ratio: 1 / 1;
}

.img-frame--4x5 {
  aspect-ratio: 4 / 5;
}

.img-frame img,
.img-frame svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 12px 16px;
}

.site-header__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: 1440px;
  margin: 0 auto;
  padding: 8px 8px 8px 18px;
  background: rgba(11, 29, 58, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-pill);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
}

@supports (backdrop-filter: blur(12px)) {
  .site-header__inner {
    background: rgba(11, 29, 58, 0.82);
    backdrop-filter: blur(12px);
  }
}

.site-header__inner::before {
  content: "";
  position: absolute;
  left: 24px;
  top: -1px;
  width: 48px;
  height: 3px;
  background: var(--color-orange);
  border-radius: 0 0 4px 4px;
  box-shadow: 0 2px 12px rgba(255, 107, 53, 0.7);
}

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

.site-brand__icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  background: rgba(255, 107, 53, 0.1);
  border: 2px solid var(--color-orange);
  border-radius: 12px;
  color: var(--color-orange);
}

.site-brand__text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.15;
}

.site-brand__name {
  font-family: var(--font-headline);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-white);
  line-height: 1.1;
}

.site-brand__sub {
  font-family: var(--font-headline);
  font-size: 10px;
  letter-spacing: 4px;
  color: var(--color-light-gray);
  text-transform: uppercase;
}

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

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.site-nav__list a {
  display: block;
  padding: 10px 16px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--color-light-gray);
  white-space: nowrap;
  transition: color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.site-nav__list a:hover {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.07);
}

.site-nav__list a[aria-current="page"] {
  color: var(--color-deep-blue);
  background: var(--color-orange);
  font-weight: 700;
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.4);
}

.site-header__actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  flex-shrink: 0;
}

.site-header__status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 500;
  color: var(--color-light-gray);
  white-space: nowrap;
}

.status-dot {
  position: relative;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-green);
  box-shadow: 0 0 8px rgba(57, 255, 20, 0.6);
  animation: statusPulse 2.2s ease-in-out infinite;
}

@keyframes statusPulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(57, 255, 20, 0.55);
  }
  50% {
    box-shadow: 0 0 0 6px rgba(57, 255, 20, 0);
  }
}

.nav-toggle {
  display: none;
  position: relative;
  width: 44px;
  height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: transparent;
  border: 2px solid rgba(255, 255, 255, 0.22);
  border-radius: 12px;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.nav-toggle:hover {
  border-color: var(--color-orange);
  background: rgba(255, 107, 53, 0.08);
}

.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-white);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

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

.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);
}

.site-footer {
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
  margin-top: 80px;
  background-color: #0a1526;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(180deg, var(--color-carbon) 0%, var(--color-deep-blue) 28%, #0a1526 100%);
  background-size: 48px 48px, 48px 48px, 100% 100%;
  border-top: 3px solid var(--color-orange);
  color: var(--color-light-gray);
}

.site-footer::after {
  content: "SPORTTOP";
  position: absolute;
  right: -24px;
  bottom: 20px;
  z-index: 0;
  font-family: var(--font-headline);
  font-size: clamp(5rem, 16vw, 13rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1;
  color: rgba(255, 255, 255, 0.028);
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
}

.site-footer__top {
  position: relative;
  z-index: 1;
  padding: 56px 0 48px;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.7fr;
  gap: 40px;
}

.footer-brand__logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.footer-brand__icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  background: rgba(255, 107, 53, 0.1);
  border: 2px solid var(--color-orange);
  border-radius: 10px;
  color: var(--color-orange);
}

.footer-brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.footer-brand__name {
  font-family: var(--font-headline);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.04em;
  line-height: 1.1;
}

.footer-brand__sub {
  font-family: var(--font-headline);
  font-size: 10px;
  letter-spacing: 4px;
  color: var(--color-light-gray);
  text-transform: uppercase;
}

.footer-brand__desc {
  margin-top: 16px;
  max-width: 320px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-light-gray);
}

.footer-col__title {
  display: inline-block;
  margin-bottom: 18px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-orange);
  font-family: var(--font-headline);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--color-white);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-light-gray);
  font-size: 14px;
  text-decoration: none;
  transition: color 0.2s ease, transform 0.2s ease;
}

.footer-links a::before {
  content: "";
  width: 14px;
  height: 2px;
  background: var(--color-orange);
  opacity: 0.45;
  transition: opacity 0.2s ease, width 0.2s ease;
}

.footer-links a:hover {
  color: var(--color-white);
  transform: translateX(4px);
}

.footer-links a:hover::before {
  opacity: 1;
  width: 22px;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-contact__line {
  display: flex;
  gap: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-light-gray);
}

.footer-contact__line strong {
  display: inline-block;
  min-width: 2.4em;
  color: var(--color-orange);
  font-weight: 700;
}

.footer-contact__line--muted {
  color: rgba(209, 213, 219, 0.6);
}

.footer-contact__line--muted strong {
  color: rgba(255, 107, 53, 0.8);
}

.site-footer__trust {
  position: relative;
  z-index: 1;
  background: rgba(123, 44, 191, 0.08);
  border-top: 1px solid rgba(123, 44, 191, 0.25);
  border-bottom: 1px solid rgba(123, 44, 191, 0.25);
  border-left: 4px solid var(--color-purple);
  padding: 22px 0;
}

.site-footer__trust p {
  max-width: 960px;
  margin: 0 auto;
  font-size: 13px;
  line-height: 1.8;
  color: rgba(209, 213, 219, 0.7);
}

.site-footer__bottom {
  position: relative;
  z-index: 1;
  padding: 20px 0;
  background: rgba(0, 0, 0, 0.28);
  border-top: 1px solid rgba(255, 255, 255, 0.07);
}

.site-footer__bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.site-footer__copyright,
.site-footer__icp {
  font-size: 13px;
  color: rgba(209, 213, 219, 0.62);
}

[data-scroll-progress] {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 3000;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-orange), var(--color-green));
  box-shadow: 0 0 12px rgba(255, 107, 53, 0.55);
  pointer-events: none;
}

[data-back-top] {
  position: fixed;
  right: 28px;
  bottom: 28px;
  z-index: 900;
  width: 52px;
  height: 52px;
  background: var(--color-orange);
  border: 2px solid rgba(255, 255, 255, 0.22);
  border-radius: 14px;
  box-shadow: 0 8px 24px rgba(255, 107, 53, 0.35);
  color: var(--color-deep-blue);
  font-size: 24px;
  font-family: var(--font-headline);
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

[data-back-top][data-visible="true"] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

[data-back-top]:hover {
  background: var(--color-deep-blue);
  color: var(--color-orange);
  border-color: var(--color-orange);
}

html.js [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

html.js [data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1120px) {
  .site-header__status {
    display: none;
  }

  .site-nav__list a {
    padding: 8px 12px;
    font-size: 13px;
  }
}

@media (max-width: 1024px) {
  .site-header__inner {
    border-radius: 18px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    right: 0;
    display: block;
    background: rgba(11, 29, 58, 0.97);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 16px;
    box-shadow: var(--shadow-pop);
    padding: 16px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
    pointer-events: none;
  }

  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .site-nav__list a {
    display: block;
    padding: 12px 14px;
    font-size: 15px;
    border-radius: 10px;
    white-space: normal;
  }

  .site-nav__list a[aria-current="page"] {
    box-shadow: none;
  }

  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
  }

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

@media (max-width: 720px) {
  .site-header__actions .btn--primary {
    display: none;
  }

  .site-header__inner {
    padding: 6px 6px 6px 14px;
  }

  .site-brand__icon {
    width: 38px;
    height: 38px;
  }

  .site-brand__name {
    font-size: 18px;
  }

  .site-brand__sub {
    font-size: 9px;
    letter-spacing: 3px;
  }

  #main-content {
    padding-top: 84px;
  }
}

@media (max-width: 640px) {
  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .site-footer__bottom-inner {
    flex-direction: column;
    text-align: center;
  }

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

  [data-back-top] {
    right: 16px;
    bottom: 16px;
    width: 46px;
    height: 46px;
  }
}

@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;
  }

  html.js [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none !important;
  }
}