:root {
  --color-deep-blue: #0A0E27;
  --color-blue-purple: #2A1E5C;
  --color-purple: #4A3B8F;
  --color-neon-orange: #FF6B35;
  --color-bright-red: #FF2E4D;
  --color-light-gray: #F2F2F7;
  --color-white: #FFFFFF;
  --color-dark-gray: #1C1C1E;
  --color-beige: #E8E3D9;
  --gradient-main: linear-gradient(135deg, #0A0E27 0%, #2A1E5C 55%, #4A3B8F 100%);
  --font-title: "Arial Black", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-data: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --content-width: 1280px;
  --rail-width: 280px;
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  padding: 0;
  background: var(--color-deep-blue);
  color: var(--color-light-gray);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

ul, ol {
  list-style: none;
}

a {
  color: var(--color-neon-orange);
  text-decoration: none;
}

a:hover {
  color: #ff9a6b;
  text-decoration: underline;
  text-underline-offset: 4px;
}

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

button {
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  cursor: pointer;
}

:focus-visible {
  outline: 3px solid var(--color-neon-orange);
  outline-offset: 3px;
  border-radius: 2px;
}

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

#main-content {
  outline: none;
  scroll-margin-top: 20px;
}

.skip-link {
  position: fixed;
  top: -120px;
  left: 16px;
  z-index: 2000;
  padding: 12px 20px;
  background: var(--color-neon-orange);
  color: var(--color-deep-blue);
  font-family: var(--font-title);
  font-size: .9rem;
  letter-spacing: .06em;
  border-radius: 0 0 8px 8px;
  transition: top .2s;
}

.skip-link:focus {
  top: 0;
  color: var(--color-deep-blue);
  text-decoration: none;
}

.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--gradient-main);
  color: var(--color-white);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  box-shadow: 0 8px 20px rgba(4, 6, 18, .25);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(-45deg, rgba(255, 255, 255, .035) 0 1px, transparent 1px 12px);
  pointer-events: none;
}

.site-header::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(to bottom, var(--color-neon-orange), var(--color-bright-red), transparent);
  opacity: .55;
  display: none;
}

.site-header__inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
}

.site-brand {
  position: relative;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--color-white);
  text-decoration: none;
}

.site-brand:hover {
  color: var(--color-white);
  text-decoration: none;
}

.site-brand__mark {
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-neon-orange);
  color: var(--color-deep-blue);
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 1.25rem;
  clip-path: polygon(15% 0, 100% 0, 100% 70%, 85% 100%, 0 100%, 0 15%);
  transform: skewX(-4deg);
}

.site-brand__name {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.site-brand__text {
  font-family: var(--font-title);
  font-size: 1.25rem;
  letter-spacing: .05em;
  text-shadow: 2px 2px 0 rgba(255, 107, 53, .45);
}

.site-brand__tagline {
  font-size: .62rem;
  letter-spacing: .22em;
  color: rgba(255, 255, 255, .58);
  text-transform: uppercase;
}

.nav-toggle {
  position: relative;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  padding: 10px 12px;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .14);
  color: var(--color-white);
  font-size: .78rem;
  letter-spacing: .1em;
}

.nav-toggle:hover {
  background: rgba(255, 107, 53, .16);
  border-color: var(--color-neon-orange);
}

.nav-toggle__line {
  position: relative;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: background .2s;
}

.nav-toggle__line::before,
.nav-toggle__line::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform .2s, top .2s;
}

.nav-toggle__line::before {
  top: -6px;
}

.nav-toggle__line::after {
  top: 6px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line::after {
  top: 0;
  transform: rotate(-45deg);
}

.nav-toggle__label {
  font-family: var(--font-title);
}

.primary-nav {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: min(84vw, 320px);
  z-index: 1050;
  margin: 0;
  padding: 96px 20px 24px;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: linear-gradient(155deg, var(--color-deep-blue) 0%, var(--color-blue-purple) 60%, var(--color-purple) 100%);
  box-shadow: 8px 0 24px rgba(0, 0, 0, .4);
  transform: translateX(-100%);
  visibility: hidden;
  transition: transform .28s cubic-bezier(.2, .8, .2, 1), visibility 0s linear .28s;
}

.site-header[data-open] .primary-nav {
  transform: translateX(0);
  visibility: visible;
  transition: transform .28s cubic-bezier(.2, .8, .2, 1), visibility 0s;
}

.primary-nav__list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.primary-nav__item {
  list-style: none;
}

.primary-nav__link {
  position: relative;
  display: block;
  padding: 12px 14px 12px 20px;
  color: rgba(255, 255, 255, .72);
  font-family: var(--font-title);
  font-size: .9rem;
  letter-spacing: .1em;
  border-left: 3px solid transparent;
  transition: background .2s, color .2s, padding-left .2s;
}

.primary-nav__link:hover {
  background: rgba(255, 255, 255, .06);
  color: var(--color-white);
  text-decoration: none;
  padding-left: 26px;
}

.primary-nav__link:focus-visible {
  outline-offset: -4px;
  background: rgba(255, 255, 255, .1);
}

.primary-nav__link[aria-current="page"] {
  background: linear-gradient(90deg, rgba(255, 107, 53, .18), rgba(255, 107, 53, 0) 92%);
  border-left-color: var(--color-neon-orange);
  color: var(--color-white);
}

.header-meta {
  display: none;
}

.header-account {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, .05);
  border: 1px dashed rgba(255, 255, 255, .16);
  color: rgba(255, 255, 255, .72);
  font-size: .78rem;
  letter-spacing: .06em;
}

.header-account__dot {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--color-neon-orange);
  box-shadow: 0 0 0 rgba(255, 107, 53, .6);
}

.rail-backtop {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 12px 14px;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .12);
  color: rgba(255, 255, 255, .8);
  font-size: .8rem;
  letter-spacing: .08em;
  text-align: left;
}

.rail-backtop:hover {
  background: rgba(255, 107, 53, .18);
  border-color: var(--color-neon-orange);
  color: var(--color-white);
}

.rail-backtop__arrow {
  font-family: var(--font-data);
  color: var(--color-neon-orange);
  font-size: 1rem;
}

.scroll-progress {
  display: none;
}

.site-footer {
  background: linear-gradient(180deg, #0A0E27 0%, #131237 100%);
  color: rgba(255, 255, 255, .72);
  border-top: 1px solid rgba(255, 255, 255, .08);
}

.site-footer__inner {
  max-width: var(--content-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  padding: 48px 20px 28px;
}

.site-footer .site-brand__mark {
  background: var(--color-bright-red);
}

.site-footer .site-brand__tagline {
  color: rgba(255, 255, 255, .5);
}

.site-footer__slogan {
  margin-top: 16px;
  font-size: .9rem;
  color: rgba(255, 255, 255, .6);
}

.site-footer__trust {
  margin-top: 12px;
  padding-left: 12px;
  border-left: 3px solid var(--color-neon-orange);
  font-size: .78rem;
  color: rgba(255, 255, 255, .48);
  line-height: 1.7;
}

.site-footer__nav {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.site-footer__col {
  min-width: 0;
}

.site-footer__col-title {
  margin-bottom: 14px;
  font-family: var(--font-title);
  font-size: .74rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--color-neon-orange);
  font-weight: 900;
}

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

.site-footer__link {
  display: inline-block;
  width: fit-content;
  color: rgba(255, 255, 255, .68);
  font-size: .85rem;
}

.site-footer__link:hover {
  color: var(--color-neon-orange);
  text-decoration: none;
  padding-left: 4px;
}

.site-footer__contactlist {
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: .85rem;
}

.site-footer__contactlist li {
  color: rgba(255, 255, 255, .72);
}

.site-footer__contactlist a {
  color: var(--color-neon-orange);
}

.site-footer__contact-label {
  display: block;
  margin-bottom: 2px;
  font-size: .66rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, .4);
}

.site-footer__meta {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, .08);
  font-size: .78rem;
  color: rgba(255, 255, 255, .5);
}

.site-footer__meta-hint {
  margin: 0;
}

.content-shell {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 32px 20px 80px;
}

.section-block {
  padding: 64px 0;
}

.section-block--flush {
  padding: 32px 0;
}

.section-heading {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
}

.section-number {
  flex: 0 0 auto;
  padding-top: 6px;
  font-family: var(--font-data);
  font-size: .82rem;
  letter-spacing: .08em;
  color: var(--color-neon-orange);
  transform: skewX(-6deg);
}

.section-title {
  font-family: var(--font-title);
  font-size: clamp(1.45rem, 4vw, 2.6rem);
  line-height: 1.16;
  color: var(--color-white);
  letter-spacing: .02em;
}

.section-lead {
  max-width: 720px;
  margin-top: 8px;
  color: rgba(255, 255, 255, .72);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 0;
  margin-bottom: 32px;
  font-size: .78rem;
}

.breadcrumb__item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, .55);
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: rgba(255, 255, 255, .3);
}

.breadcrumb__link {
  color: rgba(255, 255, 255, .75);
}

.breadcrumb__link:hover {
  color: var(--color-neon-orange);
  text-decoration: none;
}

.breadcrumb__item[aria-current="page"] {
  color: var(--color-neon-orange);
  font-family: var(--font-data);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  font-family: var(--font-title);
  font-size: .9rem;
  letter-spacing: .08em;
  background: var(--color-neon-orange);
  color: var(--color-deep-blue);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background .2s, border-color .2s, color .2s, transform .15s;
}

.btn:hover {
  background: #ff8a52;
  color: var(--color-deep-blue);
  text-decoration: none;
  transform: translateY(-2px);
}

.btn--primary {
  background: var(--color-neon-orange);
  color: var(--color-deep-blue);
}

.btn--ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, .3);
  color: var(--color-white);
}

.btn--ghost:hover {
  border-color: var(--color-neon-orange);
  color: var(--color-neon-orange);
  background: rgba(255, 107, 53, .08);
  transform: none;
}

.btn--small {
  padding: 10px 16px;
  font-size: .78rem;
}

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin: 0;
}

.grid__item {
  min-width: 0;
}

.card {
  padding: 24px;
  background: rgba(255, 255, 255, .04);
  box-shadow: 0 1px 0 rgba(255, 255, 255, .04);
  border-left: 3px solid var(--color-purple);
}

.card--accent {
  border-left-color: var(--color-neon-orange);
}

.card__title {
  margin-bottom: 8px;
  font-family: var(--font-title);
  font-size: 1.08rem;
  color: var(--color-white);
}

.card__text {
  color: rgba(255, 255, 255, .72);
  font-size: .9rem;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .12);
  color: rgba(255, 255, 255, .8);
  font-family: var(--font-data);
  font-size: .72rem;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.tag--accent {
  background: rgba(255, 107, 53, .14);
  border-color: var(--color-neon-orange);
  color: var(--color-neon-orange);
}

.tag--data {
  background: rgba(42, 30, 92, .6);
  border-color: rgba(255, 255, 255, .16);
  color: var(--color-white);
}

.image-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--color-blue-purple), var(--color-deep-blue));
}

.image-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(-45deg, rgba(255, 107, 53, .08) 0 1px, transparent 1px 10px);
  mix-blend-mode: screen;
  pointer-events: none;
}

.image-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.image-frame--tall {
  aspect-ratio: 4 / 5;
}

.table-track {
  width: 100%;
  border-collapse: collapse;
  font-size: .86rem;
}

.table-track th {
  padding: 10px 12px;
  text-align: left;
  font-family: var(--font-data);
  font-size: .72rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--color-neon-orange);
  border-bottom: 2px solid var(--color-neon-orange);
}

.table-track td {
  padding: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  color: rgba(255, 255, 255, .78);
}

.table-track tr:hover td {
  background: rgba(255, 255, 255, .03);
}

.notice-strip {
  display: flex;
  gap: 12px;
  padding: 16px 20px;
  background: rgba(255, 255, 255, .04);
  border-left: 4px solid var(--color-neon-orange);
  font-size: .88rem;
  color: rgba(255, 255, 255, .76);
}

.notice-strip::before {
  content: "◆";
  color: var(--color-neon-orange);
  font-family: var(--font-data);
}

.data-highlight {
  font-family: var(--font-data);
  color: var(--color-neon-orange);
  font-size: 1.08em;
  letter-spacing: -.02em;
}

@media (min-width: 641px) {
  .content-shell {
    padding: 40px 32px 96px;
  }

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

  .site-footer__inner {
    grid-template-columns: repeat(8, 1fr);
    gap: 40px;
    padding: 56px 32px 32px;
  }

  .site-footer__brand {
    grid-column: span 8;
  }

  .site-footer__nav {
    grid-column: span 4;
  }

  .site-footer__contact {
    grid-column: span 4;
  }

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

@media (min-width: 901px) {
  body {
    padding-left: var(--rail-width);
  }

  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--rail-width);
    height: 100vh;
    height: 100dvh;
    border-bottom: 0;
    border-right: 1px solid rgba(255, 255, 255, .08);
    box-shadow: 12px 0 24px rgba(4, 6, 18, .35);
    overflow: hidden;
  }

  .site-header::after {
    display: block;
  }

  .site-header__inner {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    height: 100%;
    padding: 32px 22px 28px;
  }

  .nav-toggle {
    display: none;
  }

  .primary-nav {
    position: static;
    transform: none;
    visibility: visible;
    width: auto;
    height: auto;
    margin-top: 44px;
    padding: 0;
    background: transparent;
    box-shadow: none;
    transition: none;
    overflow: visible;
  }

  .site-header[data-open] .primary-nav {
    transform: none;
    visibility: visible;
  }

  .header-meta {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
    margin-top: auto;
  }

  .scroll-progress {
    display: block;
    position: absolute;
    right: 0;
    bottom: 0;
    width: 4px;
    height: 0;
    background: linear-gradient(to top, var(--color-bright-red), var(--color-neon-orange));
    z-index: 3;
  }

  .rail-backtop {
    display: flex;
  }

  .site-footer__inner {
    grid-template-columns: repeat(12, 1fr);
    padding: 64px 40px 32px;
  }

  .site-footer__brand {
    grid-column: span 4;
  }

  .site-footer__nav {
    grid-column: span 4;
  }

  .site-footer__contact {
    grid-column: span 4;
  }

  .site-footer__meta {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
  }

  .site-footer__meta-hint {
    margin-left: 24px;
  }
}

@media (min-width: 1024px) {
  .grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    transition-duration: .001ms !important;
  }

  .primary-nav,
  .site-header[data-open] .primary-nav {
    transition: none;
  }
}