/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
main { display: block; position: relative; z-index: 1; }
img, svg { display: block; max-width: 100%; }
ul, ol { margin: 0; padding: 0; }
h1, h2, h3, h4, h5, h6 { margin: 0; font-weight: normal; }
p { margin: 0 0 1rem; }
button { font-family: inherit; border: 0; }
a { color: var(--accent-lime); }

/* ===== Design Tokens ===== */
:root {
  --bg-deep: #0A0E17;
  --bg-blue: #0E1A2B;
  --bg-card: #2E2A4A;
  --accent-lime: #C6FF00;
  --accent-gold: #FFC000;
  --accent-darkgold: #B8894C;
  --text-metal: #B0B8C4;
  --text-light: #E6E9EF;
  --text-white: #FFFFFF;
  --font-head: "Impact", "Arial Black", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --container-max: 1280px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ===== Body Base ===== */
body {
  background: var(--bg-deep);
  color: var(--text-metal);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(176, 184, 196, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(176, 184, 196, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
}
::selection { background: var(--accent-lime); color: var(--bg-deep); }
::-webkit-scrollbar { width: 10px; background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: var(--bg-card); border-radius: 5px; border: 2px solid var(--bg-deep); }
::-webkit-scrollbar-thumb:hover { background: #3C365C; }

/* ===== Utilities ===== */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

/* ===== Focus ===== */
:focus-visible {
  outline: 2px solid var(--accent-lime);
  outline-offset: 2px;
  border-radius: 3px;
}

/* ===== Skip Link ===== */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 200;
  padding: 0.75rem 1.25rem;
  background: var(--accent-lime);
  color: var(--bg-deep);
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  border-radius: 3px;
}
.skip-link:focus { top: 1rem; }

/* ===== Scroll Progress ===== */
.site-progress {
  position: absolute;
  top: 0; left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-lime), var(--accent-gold));
  transition: width 0.12s linear;
  z-index: 120;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 23, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(198, 255, 0, 0.14);
}
.header-inner {
  max-width: var(--container-max);
  margin-inline: auto;
  height: 68px;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-inline: clamp(1rem, 3vw, 2rem);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-white);
  flex-shrink: 0;
}
.brand-mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  font-family: var(--font-head);
  font-size: 1.4rem;
  color: var(--bg-deep);
  background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-lime) 130%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}
.brand-mark::after {
  content: "";
  position: absolute;
  top: 5px; right: 5px;
  width: 6px; height: 6px;
  background: var(--bg-deep);
  transform: rotate(45deg);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text-main { font-family: var(--font-head); font-size: 1.08rem; color: var(--text-white); letter-spacing: 0.06em; }
.brand-text-sub { font-size: 0.66rem; color: var(--accent-gold); letter-spacing: 0.34em; }

/* ===== Nav Desktop ===== */
.site-nav { margin-left: auto; }
.nav-list { display: flex; gap: 0.25rem; list-style: none; }
.nav-item { list-style: none; }
.nav-command-meta { display: none; }
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  height: 68px;
  gap: 0.45rem;
  padding: 0 0.7rem;
  color: var(--text-metal);
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: color 0.25s ease;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 12%; right: 12%; bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-lime), var(--accent-gold));
  transform: scaleX(0) skewX(-24deg);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}
.nav-link:hover, .nav-link[aria-current="page"] { color: var(--text-white); }
.nav-link:hover::after, .nav-link[aria-current="page"]::after { transform: scaleX(1) skewX(-24deg); }
.nav-num { font-family: var(--font-head); font-size: 0.72rem; color: var(--accent-darkgold); }
.nav-link:hover .nav-num, .nav-link[aria-current="page"] .nav-num { color: var(--accent-lime); }
.nav-label { display: inline-block; }

/* ===== Header Searchbox ===== */
.header-searchbox {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  height: 42px;
  padding: 0 0.75rem;
  border: 1px solid rgba(176, 184, 196, 0.35);
  border-radius: 4px;
  background: rgba(14, 26, 43, 0.6);
  color: var(--text-metal);
  font-size: 0.88rem;
  text-decoration: none;
  flex-shrink: 0;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, color 0.25s ease;
}
.header-searchbox:hover, .header-searchbox:focus-visible {
  border-color: var(--accent-lime);
  box-shadow: 0 0 0 3px rgba(198, 255, 0, 0.12);
  color: var(--text-light);
}
.searchbox-icon { position: relative; width: 14px; height: 14px; display: inline-block; }
.searchbox-icon::before {
  content: "";
  position: absolute;
  width: 10px; height: 10px;
  left: 0; top: 1px;
  border: 2px solid currentColor;
  border-radius: 50%;
}
.searchbox-icon::after {
  content: "";
  position: absolute;
  width: 6px; height: 2px;
  right: -1px; bottom: 1px;
  background: currentColor;
  transform: rotate(45deg);
  border-radius: 1px;
}
.searchbox-text { white-space: nowrap; }
.searchbox-key {
  font-family: var(--font-head);
  font-size: 0.7rem;
  letter-spacing: 0.4px;
  color: var(--accent-lime);
  background: rgba(198, 255, 0, 0.14);
  border: 1px solid rgba(198, 255, 0, 0.4);
  border-radius: 3px;
  padding: 0.12rem 0.42rem;
}

/* ===== Nav Toggle ===== */
.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid rgba(198, 255, 0, 0.35);
  border-radius: 4px;
  cursor: pointer;
  flex-shrink: 0;
}
.nav-toggle-line {
  width: 18px;
  height: 2px;
  background: var(--accent-lime);
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Mobile Nav ===== */
@media (max-width: 1023.98px) {
  .header-inner { height: 60px; }
  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin: 0;
    background: linear-gradient(160deg, var(--bg-blue) 0%, var(--bg-deep) 100%);
    border-top: 2px solid var(--accent-lime);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.55);
    padding-bottom: 1rem;
  }
  .site-nav[data-open] { display: block; }
  .nav-command-meta {
    display: block;
    padding: 0.6rem 1.25rem 0.35rem;
    font-family: var(--font-head);
    font-size: 0.68rem;
    letter-spacing: 0.22em;
    color: rgba(176, 184, 196, 0.55);
  }
  .nav-list { flex-direction: column; gap: 0; }
  .nav-item { border-bottom: 1px solid rgba(176, 184, 196, 0.14); }
  .nav-link {
    display: flex;
    align-items: center;
    height: auto;
    min-height: 50px;
    padding: 0.8rem 1.25rem;
    font-size: 1rem;
  }
  .nav-link::after { display: none; }
  .nav-num { margin-right: 0.75rem; }
  .nav-toggle { display: flex; }
}

@media (max-width: 640px) {
  .header-inner { height: 56px; gap: 0.5rem; }
  .header-searchbox {
    width: 44px;
    height: 44px;
    padding: 0;
    justify-content: center;
  }
  .header-searchbox .searchbox-text,
  .header-searchbox .searchbox-key { display: none; }
  .brand-mark { width: 38px; height: 38px; font-size: 1.2rem; }
  .brand-text-sub { letter-spacing: 0.2em; }
}

/* ===== Footer ===== */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: 3rem;
  background: linear-gradient(180deg, var(--bg-blue) 0%, var(--bg-deep) 100%);
  color: var(--text-metal);
  border-top: 1px solid rgba(255, 192, 0, 0.15);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-lime) 0%, var(--accent-gold) 60%, transparent 100%);
}
.footer-inner {
  max-width: var(--container-max);
  margin-inline: auto;
  padding: clamp(2.5rem, 6vw, 4rem) clamp(1.25rem, 4vw, 2.5rem) 1.75rem;
}
.footer-top {
  display: grid;
  grid-template-columns: 3fr 2fr 2fr 2.5fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}
.footer-logo {
  font-family: var(--font-head);
  font-size: 1.35rem;
  color: var(--text-white);
  letter-spacing: 0.02em;
  margin-bottom: 0.75rem;
}
.footer-logo-sub { display: block; font-size: 0.78rem; letter-spacing: 0.3em; color: var(--accent-gold); margin-top: 0.25rem; }
.footer-about { font-size: 0.95rem; line-height: 1.8; max-width: 38ch; margin-bottom: 0.75rem; }
.footer-trust {
  max-width: 46ch;
  font-size: 0.78rem;
  line-height: 1.7;
  color: rgba(176, 184, 196, 0.72);
  border-left: 2px solid var(--accent-lime);
  padding-left: 0.75rem;
}
.footer-heading {
  color: var(--accent-gold);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  border-bottom: 1px solid rgba(198, 255, 0, 0.16);
  padding-bottom: 0.5rem;
  margin-bottom: 1rem;
}
.footer-links { list-style: none; display: grid; gap: 0.6rem; }
.footer-links a {
  color: var(--text-metal);
  text-decoration: none;
  transition: color 0.22s ease, padding-left 0.22s ease;
}
.footer-links a:hover, .footer-links a:focus-visible {
  color: var(--accent-lime);
  padding-left: 4px;
}
.footer-contact-list { list-style: none; display: grid; gap: 0.7rem; }
.contact-label {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--accent-darkgold);
}
.contact-value { font-size: 0.92rem; color: var(--text-light); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  border-top: 1px solid rgba(176, 184, 196, 0.14);
  padding-top: 1.5rem;
}
.footer-copy, .footer-icp { font-size: 0.85rem; color: var(--text-metal); margin: 0; }
.footer-icp { letter-spacing: 0.08em; }

@media (max-width: 1023.98px) {
  .footer-top { grid-template-columns: 1fr 1fr; gap: 1.75rem; }
  .footer-brand { grid-column: span 2; }
}
@media (max-width: 640px) {
  .footer-top { grid-template-columns: 1fr; }
  .footer-brand { grid-column: span 1; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 44px;
  padding: 0.625rem 1.375rem;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--bg-deep);
  background: var(--accent-lime);
  border: 0;
  border-radius: 3px;
  text-decoration: none;
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: transform 0.22s ease, box-shadow 0.22s ease, background 0.22s ease, color 0.22s ease;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(198, 255, 0, 0.22); }
.btn-gold { background: var(--accent-gold); color: var(--bg-deep); }
.btn-gold:hover { box-shadow: 0 10px 24px rgba(255, 192, 0, 0.25); }
.btn-outline {
  background: transparent;
  color: var(--text-light);
  border: 1px solid rgba(176, 184, 196, 0.35);
  clip-path: none;
}
.btn-outline:hover { border-color: var(--accent-lime); color: var(--accent-lime); box-shadow: none; }

/* ===== Tags & Meta ===== */
.tag {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--accent-lime);
  background: rgba(198, 255, 0, 0.1);
  border: 1px solid rgba(198, 255, 0, 0.32);
  border-radius: 2px;
}
.tag-gold { color: var(--accent-gold); background: rgba(255, 192, 0, 0.08); border-color: rgba(255, 192, 0, 0.35); }
.meta-line {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.75rem;
  list-style: none;
  color: var(--text-metal);
  font-size: 0.85rem;
}
.meta-line li { display: inline-flex; align-items: center; gap: 0.4rem; }
.meta-line li::before { content: "◆"; font-size: 0.55rem; color: var(--accent-darkgold); }

/* ===== Section Heads ===== */
.page-section { padding-block: clamp(3.5rem, 8vw, 6.5rem); }
.sec-head { margin-bottom: 2.5rem; }
.sec-kicker {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-head);
  font-size: 0.85rem;
  letter-spacing: 0.28em;
  color: var(--accent-lime);
  text-transform: uppercase;
}
.sec-kicker::before {
  content: "";
  width: 28px;
  height: 2px;
  background: currentColor;
  transform: skewX(-30deg);
}
.sec-title {
  font-family: var(--font-head);
  font-size: clamp(1.9rem, 4.5vw, 3.5rem);
  color: var(--text-white);
  text-transform: uppercase;
  line-height: 1.05;
  letter-spacing: 0.01em;
  margin: 0.5rem 0 0;
}
.sec-desc { color: var(--text-metal); max-width: 65ch; }

/* ===== Page Header Band ===== */
.page-header {
  padding-block: clamp(2.5rem, 6vw, 4.5rem) clamp(1.5rem, 4vw, 3rem);
  border-bottom: 1px solid rgba(176, 184, 196, 0.12);
  background: linear-gradient(160deg, var(--bg-blue) 0%, var(--bg-deep) 70%);
}
.page-title {
  font-family: var(--font-head);
  color: var(--text-white);
  font-size: clamp(2rem, 5vw, 3.75rem);
  line-height: 1.05;
  text-transform: uppercase;
}
.page-desc { margin-top: 0.75rem; color: var(--text-metal); max-width: 60ch; }

/* ===== Breadcrumb ===== */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
  font-size: 0.85rem;
  color: var(--text-metal);
  margin-bottom: 1rem;
}
.breadcrumb li + li::before { content: "/"; margin-right: 0.4rem; color: var(--accent-darkgold); }
.breadcrumb a { color: var(--text-metal); text-decoration: none; }
.breadcrumb a:hover { color: var(--accent-lime); }
.breadcrumb [aria-current="page"] { color: var(--accent-lime); }

/* ===== Grid / Panel / Stat ===== */
.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1.5rem;
}
.span-4 { grid-column: span 4; }
.span-6 { grid-column: span 6; }
.span-12 { grid-column: span 12; }
@media (max-width: 640px) {
  .grid > * { grid-column: span 12 !important; }
}
.panel {
  background: var(--bg-blue);
  border: 1px solid rgba(176, 184, 196, 0.12);
  padding: clamp(1.25rem, 3vw, 2rem);
  box-shadow: inset 0 1px 0 rgba(176, 184, 196, 0.06), 8px 8px 0 rgba(0, 0, 0, 0.25);
}
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
}
.stat {
  border-left: 3px solid var(--accent-lime);
  background: var(--bg-blue);
  padding: 1.25rem;
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.35);
}
.stat-value {
  font-family: var(--font-head);
  font-size: 2.2rem;
  color: var(--accent-gold);
  line-height: 1.1;
}
.stat-label {
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: var(--text-metal);
  text-transform: uppercase;
}
.gradient-rule {
  border: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-lime) 0%, var(--accent-gold) 45%, rgba(255, 192, 0, 0) 100%);
  margin: 2rem 0;
}

/* ===== Prose ===== */
.prose { color: var(--text-metal); line-height: 1.9; }
.prose h2 {
  color: var(--text-white);
  font-family: var(--font-head);
  font-size: 1.5rem;
  margin-top: 2.25rem;
  margin-bottom: 0.75rem;
  text-transform: uppercase;
}
.prose p { margin-bottom: 1rem; }
.prose ul, .prose ol { padding-left: 1.25rem; margin-bottom: 1rem; }
.prose li { margin-bottom: 0.4rem; }
.prose a { color: var(--accent-lime); }

/* ===== Media Frames ===== */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--bg-blue) 0%, var(--bg-deep) 100%);
  border: 1px solid rgba(198, 255, 0, 0.18);
}
.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(115deg, transparent 0 25%, rgba(198, 255, 0, 0.08) 45%, transparent 65%),
    linear-gradient(155deg, rgba(255, 192, 0, 0.06) 10%, transparent 40%);
}
.media-frame::after {
  content: "DATA / IMG";
  position: absolute;
  right: 0.75rem;
  bottom: 0.5rem;
  font-family: var(--font-head);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: rgba(176, 184, 196, 0.45);
}
.img-panel {
  position: relative;
  overflow: hidden;
  background: var(--bg-blue);
  border: 1px solid rgba(176, 184, 196, 0.14);
}
.img-panel img { display: block; width: 100%; height: auto; }

/* ===== Reveal Protocol ===== */
.js [data-reveal],
.js [data-reveal="up"] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}
.js [data-reveal="left"] {
  opacity: 0;
  transform: translateX(-32px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}
.js [data-reveal="right"] {
  opacity: 0;
  transform: translateX(32px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}
.js [data-reveal="zoom"] {
  opacity: 0;
  transform: scale(0.94);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}
.js [data-reveal].is-in { opacity: 1; transform: none; }

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  .site-progress { transition: none; }
  .js [data-reveal],
  .js [data-reveal="up"],
  .js [data-reveal="left"],
  .js [data-reveal="right"],
  .js [data-reveal="zoom"] {
    opacity: 1 !important;
    transform: none !important;
    transition-delay: 0ms !important;
  }
}