:root {
  --bg: #F5F1E8;
  --bg-card: #FFFDF7;
  --bg-dark: #1B3A5C;
  --bg-dark-2: #142D47;
  --text: #2D2A26;
  --text-muted: #6B655C;
  --on-dark: #F5F1E8;
  --on-dark-muted: rgba(245, 241, 232, 0.72);
  --accent: #E85D3D;
  --accent-deep: #B83A1A;
  --violet: #7B2FF7;
  --green: #C6FF00;
  --border: #C8D6E5;
  --sidebar-w: 296px;
  --topbar-h: 64px;
  --radius: 12px;
  --shadow-sm: 0 2px 10px rgba(45, 42, 38, 0.06);
  --shadow-lg: 0 14px 34px rgba(45, 42, 38, 0.1);
  --font-display: "Arial Black", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Roboto Mono", "SFMono-Regular", "Consolas", monospace;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  background: var(--bg-dark);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
}

h1,
h2,
h3,
h4,
h5 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-style: italic;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); }
h2 { font-size: clamp(1.7rem, 3.2vw, 2.6rem); margin-bottom: 0.6em; }
h3 { font-size: clamp(1.25rem, 2.2vw, 1.6rem); }
h4 { font-size: 1.2rem; }
h5 { font-size: 1rem; }

p { margin: 0; }

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

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

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

a:hover {
  color: var(--violet);
}

::selection {
  background: var(--green);
  color: var(--text);
}

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

[hidden] {
  display: none !important;
}

.site-header a:focus-visible,
.site-footer a:focus-visible,
.nav-toggle:focus-visible {
  outline-color: var(--green);
}

.skip-link {
  position: fixed;
  top: -80px;
  left: 16px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--green);
  color: var(--text);
  font-weight: 700;
  font-family: var(--font-body);
  border-radius: 0 0 6px 6px;
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 10px);
  transition: top 0.2s ease;
}

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

.page-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  z-index: 100;
  pointer-events: none;
  background: rgba(23, 42, 58, 0.16);
}

.page-progress span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--green), var(--violet));
  transition: width 0.12s linear;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-w);
  z-index: 50;
  background: var(--bg-dark);
  background-image: repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.04) 0 1px, transparent 1px 9px);
  color: var(--on-dark);
  border-right: 1px solid rgba(200, 214, 229, 0.12);
}

.site-header__inner {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 24px 20px 22px;
}

.brand-lockup__link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--on-dark);
}

.brand-lockup__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  font-family: var(--font-display);
  font-weight: 900;
  font-style: italic;
  font-size: 1.1rem;
  color: #fff;
  background: var(--accent);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
}

.brand-lockup__name {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-style: italic;
  font-size: 1.08rem;
  line-height: 1.15;
  color: #fff;
  letter-spacing: -0.02em;
}

.brand-lockup__subtitle {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--green);
  margin-top: 3px;
}

.site-nav {
  margin-top: 30px;
}

.site-nav__list {
  display: grid;
  gap: 2px;
}

.site-nav__link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 10px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--on-dark-muted);
  border-radius: 6px;
  position: relative;
  transition: color 0.2s ease, background 0.2s ease;
}

.site-nav__link:hover {
  color: #fff;
  background: rgba(123, 47, 247, 0.16);
}

.site-nav__index {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  color: rgba(200, 214, 229, 0.5);
  min-width: 18px;
}

.site-nav__label {
  color: inherit;
}

.site-nav__link[aria-current="page"],
.site-nav__link[data-current="true"] {
  color: #fff;
}

.site-nav__link[aria-current="page"]::after,
.site-nav__link[data-current="true"]::after {
  content: "";
  position: absolute;
  right: 10px;
  width: 7px;
  height: 7px;
  background: var(--green);
  clip-path: polygon(50% 0, 100% 100%, 0 100%);
}

.site-nav__cta {
  display: none;
  width: 100%;
  margin-top: 24px;
}

.site-header__actions {
  display: grid;
  gap: 16px;
  margin-top: 26px;
}

.search-field__label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(200, 214, 229, 0.55);
}

.search-field__input {
  display: block;
  width: 100%;
  padding: 9px 12px 9px 34px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 6px;
  color: var(--on-dark);
  font-family: var(--font-body);
  font-size: 0.88rem;
  background-image: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0 1px, transparent 1px 12px);
}

.search-field__input::placeholder {
  color: rgba(245, 241, 232, 0.42);
}

.search-field__input:focus {
  outline: none;
  border-color: var(--green);
  background: rgba(255, 255, 255, 0.12);
}

.section-indicator {
  margin-top: auto;
  padding: 12px 13px;
  border: 1px solid rgba(200, 214, 229, 0.16);
  border-left: 3px solid var(--green);
  background: rgba(255, 255, 255, 0.05);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
}

.section-indicator__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(200, 214, 229, 0.6);
}

.section-indicator__value {
  display: block;
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.03em;
  color: var(--green);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.8em 1.5em;
  border: 2px solid var(--accent);
  border-radius: 999px;
  background: transparent;
  color: var(--accent);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.btn:hover {
  border-color: var(--violet);
  color: var(--violet);
  transform: translateY(-2px);
}

.btn--primary {
  background: var(--accent);
  color: var(--bg-card);
  border-color: var(--accent);
}

.btn--primary:hover {
  background: var(--violet);
  border-color: var(--violet);
  color: #fff;
}

.btn--outline {
  border-color: var(--bg-dark);
  color: var(--bg-dark);
}

.btn--outline:hover {
  border-color: var(--violet);
  color: var(--violet);
}

.btn--small {
  padding: 0.5em 1em;
  font-size: 0.82rem;
}

.btn--cta {
  border-radius: 0;
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
  clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
}

.btn--cta:hover {
  background: var(--violet);
  border-color: var(--violet);
  color: #fff;
  transform: translateY(-2px);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.07);
  color: var(--on-dark);
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
}

.nav-toggle__box {
  position: relative;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: background 0.2s ease;
}

.nav-toggle__box::before,
.nav-toggle__box::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: transform 0.2s ease;
}

.nav-toggle__box::before {
  top: -5px;
}

.nav-toggle__box::after {
  top: 5px;
}

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

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

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

.nav-scrim {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 5;
  background: rgba(20, 28, 35, 0.45);
  backdrop-filter: blur(2px);
}

.main-content {
  margin-left: var(--sidebar-w);
  min-height: 70vh;
}

.main-content:focus,
#main-content:focus {
  outline: none;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 48px;
}

.section {
  padding: 72px 0;
}

.section--tight {
  padding: 40px 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(20px, 2.4vw, 28px);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
  border-color: var(--violet);
}

.card__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-style: italic;
  font-size: 1.3rem;
  margin-bottom: 0.4em;
  letter-spacing: -0.01em;
}

.card__text {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.tag {
  display: inline-block;
  padding: 0.25em 0.75em;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #fff;
  background: var(--accent);
  border-radius: 999px;
  vertical-align: middle;
}

.tag--green {
  background: var(--green);
  color: var(--text);
}

.tag--violet {
  background: var(--violet);
  color: #fff;
}

.tag--dark {
  background: var(--bg-dark);
  color: var(--on-dark);
}

.label-index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--violet);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  margin-bottom: 24px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
}

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

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin: 0 6px;
  color: var(--border);
}

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

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

.display-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-style: italic;
  font-size: clamp(2.4rem, 6vw, 4.6rem);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--text);
}

.lede {
  font-size: 1.1rem;
  line-height: 1.75;
  color: var(--text-muted);
}

.page-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(24px, 5vw, 72px);
  align-items: center;
  padding: clamp(56px, 9vw, 96px) 0 clamp(48px, 8vw, 80px);
}

.page-hero__content {
  max-width: 34em;
}

.page-hero__kicker {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.page-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-style: italic;
  font-size: clamp(2.4rem, 6vw, 4.6rem);
  line-height: 0.98;
  letter-spacing: -0.02em;
  margin: 14px 0 18px;
}

.page-hero__lead {
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--text-muted);
  max-width: 30em;
}

.page-hero__visual {
  position: relative;
  min-height: 280px;
  background: var(--bg-dark);
  border-radius: var(--radius);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
  overflow: hidden;
}

.page-hero__visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(135deg, rgba(245, 241, 232, 0.5) 0 1px, transparent 1px 10px);
  opacity: 0.3;
  pointer-events: none;
}

.image-frame {
  position: relative;
  aspect-ratio: 4 / 3;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.image-frame__placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: linear-gradient(135deg, var(--bg-card), #e9e1d2);
}

.image-frame__placeholder::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(-45deg, var(--border) 0 1px, transparent 1px 8px);
  opacity: 0.35;
  pointer-events: none;
}

.site-footer {
  margin-left: var(--sidebar-w);
  position: relative;
  background: var(--bg-dark);
  background-image: repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.03) 0 1px, transparent 1px 10px);
  color: var(--on-dark-muted);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--violet), var(--green));
}

.site-footer__inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 56px clamp(24px, 6vw, 64px) 28px;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.35fr 0.8fr 0.9fr 1.25fr;
  gap: 36px;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--on-dark);
}

.footer-brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  font-family: var(--font-display);
  font-weight: 900;
  font-style: italic;
  font-size: 1.1rem;
  color: #fff;
  background: var(--accent);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
}

.footer-brand__name {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-style: italic;
  font-size: 1.15rem;
  color: #fff;
  letter-spacing: -0.02em;
}

.footer-brand__subtitle {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--green);
  margin-top: 3px;
}

.site-footer__about-text {
  margin-top: 18px;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--on-dark-muted);
}

.site-footer__trust {
  margin-top: 18px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.06);
  border-left: 3px solid var(--green);
  font-size: 0.86rem;
  line-height: 1.7;
  color: rgba(245, 241, 232, 0.82);
}

.site-footer__col {
  display: grid;
  align-content: start;
  gap: 2px;
}

.site-footer__heading {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 12px;
  font-style: normal;
  font-weight: 700;
}

.site-footer__links {
  display: grid;
  gap: 7px;
}

.site-footer__link {
  display: inline-block;
  color: var(--on-dark-muted);
  font-size: 0.92rem;
  transition: color 0.2s ease, transform 0.2s ease;
}

.site-footer__link:hover {
  color: var(--green);
  transform: translateX(3px);
}

.site-footer__contact-line {
  display: block;
  margin-bottom: 10px;
}

.site-footer__contact-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(200, 214, 229, 0.5);
  margin-bottom: 2px;
}

.site-footer__contact-value {
  font-size: 0.94rem;
  color: var(--on-dark-muted);
  line-height: 1.5;
}

.site-footer__contact-note {
  margin-top: 14px;
  font-size: 0.82rem;
  line-height: 1.7;
  color: rgba(200, 214, 229, 0.62);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 12px;
}

.site-footer__bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(200, 214, 229, 0.55);
}

.site-footer__copyright,
.site-footer__icp {
  margin: 0;
}

@media (max-width: 1023px) {
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: auto;
    width: 100%;
    height: var(--topbar-h);
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.14);
    z-index: 60;
  }

  .site-header__inner {
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 10px;
    height: 100%;
    padding: 0 72px 0 16px;
  }

  .brand-lockup__mark {
    width: 34px;
    height: 34px;
    font-size: 0.9rem;
    clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  }

  .brand-lockup__name {
    font-size: 0.92rem;
  }

  .brand-lockup__subtitle {
    display: none;
  }

  .site-header__actions,
  .site-header__search,
  .section-indicator {
    display: none;
  }

  .site-nav {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 12;
    width: min(78vw, 320px);
    margin: 0;
    padding: 84px 20px 24px;
    background: var(--bg-dark-2);
    background-image: repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.04) 0 1px, transparent 1px 9px);
    border-right: 1px solid rgba(255, 255, 255, 0.16);
    transform: translateX(-105%);
    transition: transform 0.26s ease;
    overflow-y: auto;
  }

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

  .site-nav__link {
    padding: 12px 8px;
  }

  .site-nav__cta {
    display: inline-flex;
  }

  .nav-toggle {
    position: absolute;
    top: 13px;
    right: 14px;
    z-index: 14;
    display: inline-flex;
  }

  .nav-scrim {
    display: none;
  }

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

  body[data-nav-open="true"] {
    overflow: hidden;
  }

  .main-content {
    margin-left: 0;
  }

  .site-footer {
    margin-left: 0;
  }

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

  .site-footer__about,
  .site-footer__contact {
    grid-column: 1 / -1;
  }
}

@media (max-width: 900px) {
  .container {
    padding: 0 20px;
  }

  .section {
    padding: 52px 0;
  }

  .page-hero {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .page-hero__content {
    order: 2;
  }

  .page-hero__visual {
    order: 1;
    min-height: 200px;
  }

  .grid {
    grid-template-columns: repeat(6, 1fr);
  }
}

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

  .site-footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

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

  .nav-toggle__label {
    display: none;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .page-progress span {
    transition: none;
  }

  .site-nav {
    transition: none;
  }

  .nav-toggle__box,
  .nav-toggle__box::before,
  .nav-toggle__box::after {
    transition: none;
  }
}