:root {
  --c-blue: #00A3FF;
  --c-orange: #FF7A00;
  --c-bg: #1A1D29;
  --c-panel: #2C2F3A;
  --c-panel-raised: #343846;
  --c-white: #FFFFFF;
  --c-gold: #FFD500;
  --c-violet: #5A5FFF;
  --c-green: #00E5A0;
  --c-red: #FF5C5C;
  --c-muted: rgba(255, 255, 255, 0.55);
  --c-border: rgba(255, 255, 255, 0.09);
  --t-heading: 'Impact', 'Arial Black', 'Helvetica Neue', sans-serif;
  --t-body: 'Roboto', 'Noto Sans SC', 'Microsoft YaHei', 'PingFang SC', sans-serif;
  --gradient-blue: linear-gradient(135deg, #00A3FF 0%, #5A5FFF 100%);
  --gradient-orange: linear-gradient(135deg, #FF7A00 0%, #FFD500 100%);
  --gradient-accent: linear-gradient(90deg, #00A3FF 0%, #FF7A00 100%);
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.25);
  --shadow-hover: 0 12px 30px rgba(0, 0, 0, 0.35);
  --radius: 6px;
  --radius-lg: 12px;
  --container-max: 1200px;
  --header-h: 72px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

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

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

body {
  font-family: var(--t-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--c-white);
  background-color: var(--c-bg);
  background-image:
    radial-gradient(circle at 85% 10%, rgba(0, 163, 255, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 15% 80%, rgba(255, 122, 0, 0.05) 0%, transparent 35%),
    linear-gradient(180deg, #171a24 0%, var(--c-bg) 40%, #131620 100%);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
}

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

a {
  color: var(--c-blue);
  text-decoration: none;
  transition: color 0.2s var(--ease-out);
}

a:hover {
  color: var(--c-orange);
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--t-heading);
  font-weight: 900;
  font-style: italic;
  text-transform: uppercase;
  letter-spacing: -0.5px;
  line-height: 1.1;
}

p {
  margin-bottom: 1rem;
}

p:last-child {
  margin-bottom: 0;
}

:focus-visible {
  outline: 3px solid var(--c-blue);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection {
  background: var(--c-blue);
  color: var(--c-bg);
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 2000;
  padding: 10px 20px;
  background: var(--c-blue);
  color: var(--c-white);
  font-weight: 700;
  font-size: 14px;
  border-radius: 0 0 var(--radius) var(--radius);
  transition: top 0.25s var(--ease-out);
}

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

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: 16px;
  padding-right: 16px;
}

.site-header {
  position: relative;
  z-index: 100;
  background: rgba(26, 29, 41, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--c-border);
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: var(--gradient-accent);
  z-index: 1200;
  box-shadow: 0 0 8px rgba(0, 163, 255, 0.5);
  transition: width 0.08s linear;
}

.site-header__top {
  background: linear-gradient(180deg, #1e2230 0%, #1a1d29 100%);
  border-bottom: 1px solid var(--c-border);
}

.site-header__top-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  gap: 16px;
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  flex-shrink: 0;
}

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

.site-brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 50px;
  height: 38px;
  padding: 0 12px;
  background: var(--gradient-blue);
  color: var(--c-white);
  font-family: var(--t-heading);
  font-weight: 900;
  font-style: italic;
  font-size: 18px;
  letter-spacing: 0.5px;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  box-shadow: 0 2px 10px rgba(0, 163, 255, 0.3);
}

.site-brand__cn {
  font-family: var(--t-heading);
  font-weight: 900;
  font-style: italic;
  font-size: 22px;
  letter-spacing: 1px;
  color: var(--c-white);
  text-transform: uppercase;
  line-height: 1;
}

.site-brand__cn-suffix {
  color: var(--c-orange);
  margin-left: 2px;
  font-size: 16px;
  vertical-align: super;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: 0;
  border-radius: var(--radius);
  font-family: var(--t-body);
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: transform 0.2s var(--ease-out), box-shadow 0.2s var(--ease-out), background-color 0.2s var(--ease-out), color 0.2s var(--ease-out);
}

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

.btn--primary {
  background: var(--gradient-blue);
  color: var(--c-white);
  box-shadow: 0 4px 16px rgba(0, 163, 255, 0.35);
}

.btn--primary:hover {
  box-shadow: 0 8px 24px rgba(90, 95, 255, 0.45);
  color: var(--c-white);
}

.btn--accent {
  background: var(--gradient-orange);
  color: var(--c-bg);
  box-shadow: 0 4px 16px rgba(255, 122, 0, 0.35);
}

.btn--accent:hover {
  box-shadow: 0 8px 24px rgba(255, 122, 0, 0.5);
  color: var(--c-bg);
}

.btn--ghost {
  background: transparent;
  color: var(--c-white);
  border: 2px solid var(--c-blue);
}

.btn--ghost:hover {
  background: rgba(0, 163, 255, 0.12);
  color: var(--c-white);
}

.btn--sm {
  padding: 8px 16px;
  font-size: 13px;
}

.btn--lg {
  padding: 16px 32px;
  font-size: 16px;
}

.btn__pulse {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  border-radius: inherit;
  transform: translate(-50%, -50%);
  animation: btn-pulse 2.2s infinite ease-out;
  pointer-events: none;
}

.btn {
  position: relative;
  overflow: visible;
}

.btn__text {
  position: relative;
  z-index: 1;
}

.btn--recover {
  position: relative;
  clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
  padding-left: 28px;
  padding-right: 28px;
}

@keyframes btn-pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(255, 122, 0, 0.45);
  }
  70% {
    box-shadow: 0 0 0 14px rgba(255, 122, 0, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(255, 122, 0, 0);
  }
}

.site-header__nav {
  background: rgba(44, 47, 58, 0.7);
  border-bottom: 2px solid transparent;
  border-image: linear-gradient(90deg, var(--c-blue) 0%, var(--c-orange) 100%) 1;
}

.site-header__nav-inner {
  display: flex;
  align-items: center;
  min-height: 48px;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: 0;
  padding: 10px 16px;
  cursor: pointer;
  color: var(--c-white);
  font-family: var(--t-body);
  font-size: 14px;
  font-weight: 500;
}

.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-white);
  margin: 3px 0;
  border-radius: 2px;
  transition: background-color 0.2s, transform 0.2s var(--ease-out);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(5px) 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(-5px) rotate(-45deg);
}

.nav-toggle__text {
  font-size: 13px;
  letter-spacing: 1px;
}

.site-nav {
  width: 100%;
}

.site-nav__list {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0;
}

.site-nav__item {
  position: relative;
}

.site-nav__link {
  display: block;
  padding: 14px 22px;
  font-size: 15px;
  font-weight: 700;
  color: var(--c-white);
  text-decoration: none;
  letter-spacing: 0.5px;
  transition: color 0.2s, background-color 0.2s;
  position: relative;
}

.site-nav__link::after {
  content: '';
  position: absolute;
  left: 22px;
  right: 22px;
  bottom: 6px;
  height: 2px;
  background: var(--gradient-blue);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s var(--ease-out);
}

.site-nav__link:hover {
  color: var(--c-blue);
  background: rgba(0, 163, 255, 0.06);
}

.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.site-nav__link[aria-current="page"] {
  color: var(--c-blue);
}

.site-nav__link[aria-current="page"]::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: linear-gradient(90deg, var(--c-blue), var(--c-orange));
  clip-path: polygon(4px 0, 100% 0, calc(100% - 4px) 100%, 0 100%);
}

.section {
  padding: 56px 0;
}

.section--tight {
  padding: 32px 0;
}

.section--loose {
  padding: 80px 0;
}

.section__head {
  margin-bottom: 28px;
  position: relative;
}

.section__title {
  font-size: 28px;
  color: var(--c-white);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.section__title::before {
  content: '';
  display: inline-block;
  width: 26px;
  height: 4px;
  background: var(--gradient-orange);
  clip-path: polygon(0 0, 100% 0, 80% 100%, 0 100%);
  flex-shrink: 0;
}

.section__subtitle {
  color: var(--c-muted);
  font-size: 15px;
  max-width: 720px;
}

.page-title {
  font-size: clamp(32px, 5vw, 52px);
  color: var(--c-white);
  margin-bottom: 8px;
  line-height: 1.05;
}

.page-title--accent {
  background: linear-gradient(90deg, var(--c-blue) 0%, var(--c-orange) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.page-subtitle {
  font-size: 16px;
  color: var(--c-muted);
  max-width: 640px;
  margin-bottom: 24px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  padding: 12px 0;
  font-size: 13px;
  color: var(--c-muted);
  gap: 4px;
}

.breadcrumb__item {
  display: flex;
  align-items: center;
  gap: 4px;
}

.breadcrumb__item + .breadcrumb__item::before {
  content: '/';
  margin: 0 6px;
  color: var(--c-muted);
  opacity: 0.5;
}

.breadcrumb__link {
  color: var(--c-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.breadcrumb__link:hover {
  color: var(--c-blue);
}

.breadcrumb__item[aria-current="page"] {
  color: var(--c-white);
  font-weight: 600;
}

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

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

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

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

.card {
  background: var(--c-panel);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: transform 0.25s var(--ease-out), box-shadow 0.25s var(--ease-out);
  position: relative;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.card--cut {
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
  border-radius: 0;
}

.card--blue-line {
  border-top: 3px solid var(--c-blue);
}

.card--orange-line {
  border-top: 3px solid var(--c-orange);
}

.card__title {
  font-size: 20px;
  color: var(--c-white);
  margin-bottom: 12px;
}

.card__body {
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.7;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: 2px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  line-height: 1.6;
}

.badge--blue {
  background: rgba(0, 163, 255, 0.2);
  color: var(--c-blue);
  border: 1px solid rgba(0, 163, 255, 0.3);
}

.badge--orange {
  background: rgba(255, 122, 0, 0.2);
  color: var(--c-orange);
  border: 1px solid rgba(255, 122, 0, 0.35);
}

.badge--gold {
  background: rgba(255, 213, 0, 0.15);
  color: var(--c-gold);
  border: 1px solid rgba(255, 213, 0, 0.3);
}

.badge--green {
  background: rgba(0, 229, 160, 0.15);
  color: var(--c-green);
  border: 1px solid rgba(0, 229, 160, 0.3);
}

.badge--red {
  background: rgba(255, 92, 92, 0.15);
  color: var(--c-red);
  border: 1px solid rgba(255, 92, 92, 0.3);
}

.tag {
  display: inline-block;
  padding: 2px 10px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--c-border);
  border-radius: 2px;
  font-size: 12px;
  color: var(--c-muted);
}

.media {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--c-panel-raised) 0%, var(--c-panel) 60%, #242734 100%);
  border-radius: var(--radius);
}

.media--16-9 {
  aspect-ratio: 16 / 9;
}

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

.media--1-1 {
  aspect-ratio: 1 / 1;
}

.media__inner {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-muted);
  font-size: 14px;
}

.media--cut {
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
  border-radius: 0;
}

.text-lead {
  font-size: 18px;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.85);
}

.text-muted {
  color: var(--c-muted);
  font-size: 14px;
}

.stat {
  font-family: var(--t-heading);
  font-weight: 900;
  font-style: italic;
  font-size: 36px;
  line-height: 1;
  color: var(--c-white);
  display: inline-block;
}

.stat--blue {
  color: var(--c-blue);
}

.stat--orange {
  color: var(--c-orange);
}

.stat--gold {
  color: var(--c-gold);
}

.stat--violet {
  color: var(--c-violet);
}

.stat--green {
  color: var(--c-green);
}

.stat-label {
  font-size: 13px;
  color: var(--c-muted);
  margin-top: 4px;
}

.site-footer {
  background: linear-gradient(180deg, #141720 0%, #10121a 100%);
  border-top: 2px solid transparent;
  border-image: linear-gradient(90deg, var(--c-blue) 0%, var(--c-orange) 100%) 1;
  margin-top: 80px;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.4fr;
  gap: 40px;
  padding: 56px 16px 40px;
}

.site-footer__logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  margin-bottom: 16px;
}

.site-footer__logo:hover {
  text-decoration: none;
}

.site-footer__logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  height: 34px;
  padding: 0 10px;
  background: var(--gradient-blue);
  color: var(--c-white);
  font-family: var(--t-heading);
  font-weight: 900;
  font-style: italic;
  font-size: 16px;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
}

.site-footer__logo-cn {
  font-family: var(--t-heading);
  font-weight: 900;
  font-style: italic;
  font-size: 18px;
  color: var(--c-white);
}

.site-footer__note {
  font-size: 14px;
  color: var(--c-muted);
  line-height: 1.8;
  max-width: 380px;
}

.site-footer__heading {
  font-size: 16px;
  color: var(--c-white);
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 8px;
}

.site-footer__heading::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 3px;
  background: var(--gradient-orange);
  clip-path: polygon(0 0, 100% 0, 80% 100%, 0 100%);
}

.site-footer__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.site-footer__list a {
  color: var(--c-muted);
  font-size: 14px;
  text-decoration: none;
  transition: color 0.2s, padding-left 0.2s var(--ease-out);
  position: relative;
}

.site-footer__list a:hover {
  color: var(--c-blue);
  padding-left: 18px;
}

.site-footer__list a:hover::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  background: var(--c-blue);
  clip-path: polygon(0 0, 100% 50%, 0 100%);
}

.site-footer__list--contact {
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.7;
}

.site-footer__muted {
  color: rgba(255, 255, 255, 0.35);
  font-size: 12px;
  padding-top: 6px;
}

.site-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 18px 0;
}

.site-footer__bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.site-footer__copyright,
.site-footer__icp {
  font-size: 13px;
  color: var(--c-muted);
}

@media (max-width: 1024px) {
  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .site-footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  .site-header__top-inner {
    min-height: 60px;
  }

  .site-brand__mark {
    min-width: 42px;
    height: 32px;
    font-size: 15px;
  }

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

  .site-brand__cn-suffix {
    font-size: 13px;
  }

  .btn--recover {
    padding: 9px 18px;
    font-size: 13px;
    clip-path: none;
  }

  .site-header__nav {
    background: var(--c-panel);
  }

  .site-header__nav-inner {
    flex-wrap: wrap;
    min-height: 0;
    padding-top: 0;
    padding-bottom: 0;
  }

  .nav-toggle {
    display: inline-flex;
    margin: 6px 0;
  }

  .site-nav {
    display: none;
    width: 100%;
  }

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

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
  }

  .site-nav__item {
    border-top: 1px solid var(--c-border);
  }

  .site-nav__link {
    padding: 14px 24px;
    font-size: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .site-nav__link::after {
    display: none;
  }

  .site-nav__link[aria-current="page"] {
    background: rgba(0, 163, 255, 0.1);
    border-left: 3px solid var(--c-blue);
    padding-left: 21px;
  }

  .site-nav__link[aria-current="page"]::before {
    top: auto;
    right: 16px;
    left: auto;
    transform: none;
    width: 6px;
    height: 6px;
    background: var(--c-orange);
    clip-path: none;
    border-radius: 50%;
  }

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

  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .section {
    padding: 40px 0;
  }

  .section--loose {
    padding: 56px 0;
  }

  .site-footer {
    margin-top: 56px;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
    padding: 40px 16px 32px;
    gap: 28px;
  }

  .site-footer__brand {
    grid-column: auto;
  }

  .site-footer__bottom-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
}

@media (max-width: 480px) {
  .site-header__top-inner {
    gap: 10px;
  }

  .site-brand__cn {
    font-size: 16px;
  }

  .site-brand__cn-suffix {
    display: none;
  }

  .btn--recover {
    padding: 8px 14px;
    font-size: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}