:root {
  --c-deep: #0A1128;
  --c-ocean: #12224A;
  --c-silver: #C0C8D0;
  --c-dblue: #1A2A4A;
  --c-green: #00FFA3;
  --c-orange: #FF6B35;
  --c-white: #FFFFFF;
  --c-overlay: rgba(10, 17, 40, 0.6);
  --grad-silver: linear-gradient(135deg, #E0E6ED, #8A94A6);
  --font-head: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-data: "JetBrains Mono", "SF Mono", "Cascadia Code", Consolas, monospace;
  --container-w: 1240px;
  --header-h: 72px;
  --clip-cut: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
  --z-header: 100;
  --z-fixed: 120;
  --z-skip: 200;
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--c-silver);
  background:
    radial-gradient(900px 460px at 88% -6%, rgba(0, 255, 163, 0.055), transparent 60%),
    radial-gradient(760px 420px at 6% 106%, rgba(255, 107, 53, 0.05), transparent 60%),
    var(--c-deep);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, p, ul, ol, dl, dt, dd, figure {
  margin: 0;
  padding: 0;
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  color: var(--c-white);
  line-height: 1.2;
}

h1 { font-size: clamp(2.2rem, 4.5vw, 4rem); font-weight: 900; letter-spacing: 0.01em; }
h2 { font-size: clamp(1.5rem, 3vw, 2.5rem); font-weight: 900; }
h3 { font-size: 1.1rem; font-weight: 700; }
h4 { font-size: 1rem; font-weight: 700; }

p { line-height: 1.8; }

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

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

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

b, strong { font-weight: 700; }

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

:focus { outline: none; }

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

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

.container {
  width: min(100% - 40px, var(--container-w));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  top: 14px;
  left: 14px;
  z-index: var(--z-skip);
  padding: 10px 18px;
  background: var(--c-green);
  color: var(--c-deep);
  font-weight: 700;
  border-radius: 10px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
  transform: translateY(-160%);
  transition: transform 0.2s ease;
}
.skip-link:focus { transform: translateY(0); }

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: var(--z-fixed);
  pointer-events: none;
}
.scroll-progress::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--c-green), var(--c-orange));
  transform: scaleX(var(--scroll, 0));
  transform-origin: 0 50%;
  will-change: transform;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 14px 24px 0;
  z-index: var(--z-header);
}

.nav-capsule {
  position: relative;
  max-width: var(--container-w);
  margin-inline: auto;
  height: var(--header-h);
  display: flex;
  align-items: center;
  padding: 0 12px 0 20px;
  background: rgba(10, 17, 40, 0.83);
  border: 1px solid rgba(192, 200, 208, 0.16);
  border-radius: 999px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--c-green);
  box-shadow: 0 0 0 4px rgba(0, 255, 163, 0.14), 0 0 16px rgba(0, 255, 163, 0.55);
  flex-shrink: 0;
}

.brand-text {
  display: inline-flex;
  align-items: baseline;
  gap: 5px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.04rem;
  letter-spacing: 0.06em;
  line-height: 1;
  color: var(--c-green);
  white-space: nowrap;
}
.brand-text b {
  font-weight: 900;
  color: var(--c-white);
}
.brand-text small {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  color: var(--c-silver);
  background: rgba(192, 200, 208, 0.1);
  border: 1px solid rgba(192, 200, 208, 0.18);
  padding: 2px 7px;
  border-radius: 5px;
  margin-left: 3px;
  white-space: nowrap;
}

.nav-sys {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: 14px;
  padding-left: 14px;
  border-left: 1px solid rgba(192, 200, 208, 0.16);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: rgba(192, 200, 208, 0.5);
  white-space: nowrap;
}
.nav-sys::before {
  content: "#";
  font-family: var(--font-data);
  font-size: 0.82rem;
  color: var(--c-orange);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: auto;
}
.nav-links::before {
  content: "";
  width: 1px;
  height: 22px;
  background: rgba(192, 200, 208, 0.2);
  margin-right: 10px;
}

.nav-link {
  display: block;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 500;
  color: rgba(192, 200, 208, 0.85);
  white-space: nowrap;
  transition: background 0.2s ease, color 0.2s ease;
}
.nav-link:hover {
  background: rgba(192, 200, 208, 0.08);
  color: var(--c-white);
}
.nav-link[aria-current="page"] {
  background: rgba(0, 255, 163, 0.14);
  color: var(--c-green);
}

.nav-toggle {
  display: none;
  position: relative;
  width: 40px;
  height: 40px;
  margin-left: 10px;
  border: 1px solid rgba(192, 200, 208, 0.24);
  border-radius: 50%;
  background: rgba(26, 42, 74, 0.55);
}
.nav-toggle span {
  position: absolute;
  left: 11px;
  right: 11px;
  height: 2px;
  border-radius: 2px;
  background: var(--c-white);
  transition: transform 0.28s ease;
}
.nav-toggle span:first-child { top: 14px; }
.nav-toggle span:last-child { bottom: 14px; }
.site-header[data-open] .nav-toggle span:first-child { transform: translateY(5px) rotate(45deg); }
.site-header[data-open] .nav-toggle span:last-child { transform: translateY(-5px) rotate(-45deg); }

.site-footer {
  position: relative;
  padding: 72px 0 28px;
  background: var(--c-deep);
  border-top: 1px solid rgba(192, 200, 208, 0.14);
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(192, 200, 208, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(192, 200, 208, 0.05) 1px, transparent 1px);
  background-size: 44px 44px;
}
.site-footer::after {
  content: "";
  position: absolute;
  width: 480px;
  height: 260px;
  right: -150px;
  top: -130px;
  z-index: 0;
  background: radial-gradient(circle, rgba(0, 255, 163, 0.08), transparent 68%);
  pointer-events: none;
}
.site-footer .container { position: relative; z-index: 1; }

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 0.8fr 1fr 1.3fr;
  gap: 36px 44px;
  padding-bottom: 48px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

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

.footer-tagline {
  margin-top: 14px;
  font-family: var(--font-data);
  font-size: 0.76rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-green);
}

.footer-trust {
  margin-top: 22px;
  max-width: 360px;
  font-size: 0.88rem;
  line-height: 1.85;
  color: rgba(192, 200, 208, 0.62);
  border-left: 2px solid var(--c-green);
  padding-left: 14px;
}

.footer-column { min-width: 0; }

.footer-heading {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  font-family: var(--font-data);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-white);
}
.footer-heading::before {
  content: "";
  width: 16px;
  height: 1px;
  background: var(--c-orange);
  flex-shrink: 0;
}
.footer-heading--sub { margin-top: 28px; }

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 2px;
  counter-reset: flink;
}

.footer-link {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  padding: 6px 0;
  font-size: 0.9rem;
  color: rgba(192, 200, 208, 0.78);
  counter-increment: flink;
  transition: color 0.2s ease, transform 0.2s ease;
}
.footer-link::before {
  content: "0" counter(flink);
  font-family: var(--font-data);
  font-size: 0.68rem;
  font-weight: 700;
  color: rgba(192, 200, 208, 0.4);
  transition: color 0.2s ease;
}
.footer-link:hover {
  color: var(--c-green);
  transform: translateX(4px);
}
.footer-link:hover::before { color: var(--c-green); }

.footer-contact { font-style: normal; }

.contact-row {
  display: flex;
  gap: 14px;
  padding: 8px 0;
  border-bottom: 1px dashed rgba(192, 200, 208, 0.14);
}

.contact-label {
  flex-shrink: 0;
  min-width: 34px;
  padding-top: 3px;
  font-family: var(--font-data);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--c-orange);
}

.contact-value {
  font-size: 0.9rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.82);
  word-break: break-all;
}

.contact-note {
  margin-top: 14px;
  font-size: 0.78rem;
  line-height: 1.7;
  color: rgba(192, 200, 208, 0.5);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 10px 24px;
  padding-top: 22px;
  border-top: 1px solid rgba(192, 200, 208, 0.14);
}

.footer-copyright {
  font-family: var(--font-data);
  font-size: 0.74rem;
  color: rgba(192, 200, 208, 0.55);
}

.footer-icp {
  font-family: var(--font-data);
  font-size: 0.72rem;
  color: rgba(192, 200, 208, 0.45);
  padding: 3px 10px;
  border: 1px solid rgba(192, 200, 208, 0.18);
  border-radius: 5px;
}

.footer-hud {
  margin-left: auto;
  font-family: var(--font-data);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: rgba(192, 200, 208, 0.28);
  white-space: nowrap;
}

.back-to-top {
  position: fixed;
  right: 20px;
  right: max(20px, env(safe-area-inset-right));
  bottom: 22px;
  bottom: max(22px, env(safe-area-inset-bottom));
  width: 48px;
  height: 48px;
  z-index: var(--z-fixed);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(26, 42, 74, 0.88);
  border: 1px solid rgba(0, 255, 163, 0.4);
  border-radius: 14px;
  color: var(--c-green);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease, background 0.2s ease, color 0.2s ease;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover {
  background: var(--c-green);
  color: var(--c-deep);
}
.back-to-top svg { width: 20px; height: 20px; }

.page-hero {
  position: relative;
  padding: calc(var(--header-h) + 72px) 0 clamp(40px, 6vw, 64px);
}

.section {
  padding: clamp(56px, 8vw, 96px) 0;
}

.section-header {
  display: flex;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 18px 22px;
  margin-bottom: 36px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(192, 200, 208, 0.12);
}

.section-index {
  font-family: var(--font-data);
  font-size: clamp(3rem, 6vw, 4.8rem);
  font-weight: 700;
  line-height: 0.85;
  letter-spacing: -0.03em;
  color: rgba(0, 255, 163, 0.3);
  -webkit-text-stroke: 1.5px rgba(0, 255, 163, 0.65);
}

.section-title {
  font-family: var(--font-head);
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  font-weight: 900;
  color: var(--c-white);
  line-height: 1.15;
}

.section-sub {
  width: 100%;
  max-width: 640px;
  font-size: 0.95rem;
  line-height: 1.8;
  color: rgba(192, 200, 208, 0.65);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  padding: 16px 0;
  font-size: 0.84rem;
  color: rgba(192, 200, 208, 0.5);
}
.breadcrumb a { color: var(--c-silver); }
.breadcrumb a:hover { color: var(--c-green); }
.breadcrumb li + li::before {
  content: "/";
  font-family: var(--font-data);
  color: var(--c-orange);
  margin-right: 4px;
}

.btn-primary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  font-family: var(--font-head);
  font-size: 0.93rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  border-radius: 12px;
  transition: transform 0.22s ease, box-shadow 0.22s ease, background 0.22s ease, color 0.22s ease, border-color 0.22s ease;
}

.btn-primary {
  background: var(--c-green);
  color: var(--c-deep);
  clip-path: var(--clip-cut);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(0, 255, 163, 0.24);
}

.btn-ghost {
  background: rgba(192, 200, 208, 0.04);
  border: 1px solid rgba(192, 200, 208, 0.35);
  color: var(--c-silver);
}
.btn-ghost:hover {
  transform: translateY(-2px);
  background: rgba(255, 107, 53, 0.08);
  border-color: var(--c-orange);
  color: var(--c-orange);
}

.card-cut {
  position: relative;
  padding: 26px;
  background: var(--c-ocean);
  border: 1px solid rgba(192, 200, 208, 0.14);
  clip-path: var(--clip-cut);
  transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}
.card-cut::after {
  content: "+";
  position: absolute;
  top: 10px;
  right: 14px;
  font-family: var(--font-data);
  font-size: 0.86rem;
  color: var(--c-green);
  opacity: 0.5;
}
.card-cut:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 255, 163, 0.3);
  background: var(--c-dblue);
}

.panel {
  background: var(--c-ocean);
  border: 1px solid rgba(192, 200, 208, 0.14);
  border-radius: 14px;
  padding: 28px;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 12px;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  border-radius: 999px;
  white-space: nowrap;
}
.tag::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
}
.tag--green { background: rgba(0, 255, 163, 0.12); color: var(--c-green); border: 1px solid rgba(0, 255, 163, 0.3); }
.tag--orange { background: rgba(255, 107, 53, 0.12); color: var(--c-orange); border: 1px solid rgba(255, 107, 53, 0.3); }
.tag--silver { background: rgba(192, 200, 208, 0.1); color: var(--c-silver); border: 1px solid rgba(192, 200, 208, 0.22); }

.data-line {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(192, 200, 208, 0.14);
  font-family: var(--font-data);
  font-size: 0.84rem;
}
.data-line dt { color: rgba(192, 200, 208, 0.58); }
.data-line dd { color: var(--c-white); font-weight: 700; text-align: right; }

.data-value {
  background: var(--grad-silver);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-family: var(--font-data);
  font-weight: 700;
}

.hero-frame {
  position: relative;
  padding: clamp(24px, 5vw, 48px);
  background: linear-gradient(135deg, rgba(18, 34, 74, 0.72), rgba(10, 17, 40, 0.5));
  border: 1px solid rgba(192, 200, 208, 0.18);
  clip-path: var(--clip-cut);
}
.hero-frame::before {
  content: "";
  position: absolute;
  top: 12px;
  right: 12px;
  width: 34px;
  height: 34px;
  border-top: 2px solid var(--c-green);
  border-right: 2px solid var(--c-green);
}
.hero-frame::after {
  content: "";
  position: absolute;
  left: 12px;
  bottom: 12px;
  width: 34px;
  height: 34px;
  border-left: 2px solid var(--c-orange);
  border-bottom: 2px solid var(--c-orange);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin-top: 22px;
  font-family: var(--font-data);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: rgba(192, 200, 208, 0.58);
}
.hero-meta > span {
  position: relative;
  padding-left: 14px;
}
.hero-meta > span::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 6px;
  height: 6px;
  background: var(--c-orange);
  transform: translateY(-50%) rotate(45deg);
}

.img-frame {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--c-ocean);
  border: 1px solid rgba(192, 200, 208, 0.2);
  clip-path: var(--clip-cut);
}
.img-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background-image:
    linear-gradient(rgba(192, 200, 208, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(192, 200, 208, 0.05) 1px, transparent 1px);
  background-size: 24px 24px;
}
.img-frame::after {
  content: "";
  position: absolute;
  top: 12px;
  right: 12px;
  width: 22px;
  height: 22px;
  border-top: 2px solid var(--c-green);
  border-right: 2px solid var(--c-green);
  z-index: 1;
}
.img-frame img {
  position: relative;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s ease;
}
.img-frame:hover img { transform: scale(1.03); }
.img-frame--wide { aspect-ratio: 21 / 9; }
.img-frame--data { aspect-ratio: 4 / 3; }

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  border-bottom: 1px solid rgba(192, 200, 208, 0.16);
  margin-bottom: 28px;
}

.tab {
  padding: 12px 20px;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  font-size: 0.94rem;
  font-weight: 700;
  color: rgba(192, 200, 208, 0.65);
  transition: color 0.2s ease, border-color 0.2s ease;
}
.tab:hover { color: var(--c-white); }
.tab[aria-selected="true"] {
  color: var(--c-green);
  border-bottom-color: var(--c-green);
}

.tab-panel {
  animation: tabIn 0.25s ease;
}

@keyframes tabIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.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)); }

@media (max-width: 1100px) {
  .nav-sys { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 960px) {
  .site-header { padding: 10px 16px 0; }
  .nav-capsule {
    height: 60px;
    padding: 0 6px 0 14px;
    border-radius: 18px;
  }
  .nav-toggle { display: block; margin-left: auto; }
  .nav-links {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    margin-left: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 10px;
    background: rgba(10, 17, 40, 0.97);
    border: 1px solid rgba(192, 200, 208, 0.16);
    border-radius: 16px;
    box-shadow: 0 18px 44px rgba(0, 0, 0, 0.45);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
    pointer-events: none;
  }
  .nav-links::before { display: none; }
  .site-header[data-open] .nav-links {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
  }
  .nav-link {
    display: block;
    padding: 12px 16px;
    margin: 0;
    border-radius: 12px;
    font-size: 0.95rem;
    color: rgba(192, 200, 208, 0.9);
    text-align: left;
  }
  .grid-cols-3,
  .grid-cols-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 640px) {
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 420px) {
  .brand-text small { display: none; }
}

@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;
  }
  .tab-panel { animation: none; }
}