:root {
  --bg-primary: #0A1428;
  --bg-secondary: #12224A;
  --bg-panel: #1B3159;
  --accent-green: #00FFA3;
  --accent-orange: #FF6B35;
  --text-primary: #EAF6FF;
  --text-secondary: #A8C6E6;
  --border: #2E4A7A;
  --glow: rgba(0, 255, 163, 0.3);
  --font-heading: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-data: "Roboto Mono", "Consolas", monospace;
  --container-w: 1280px;
  --header-offset: 92px;
  --radius-pill: 999px;
  --radius-card: 16px;
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

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

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background:
    radial-gradient(circle at 12% 8%, rgba(0, 255, 163, 0.05), transparent 30%),
    radial-gradient(circle at 88% 70%, rgba(255, 107, 53, 0.04), transparent 26%),
    var(--bg-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  color: var(--accent-green);
  text-decoration: none;
}

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

ul, ol { list-style: none; }

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

::selection {
  background: rgba(0, 255, 163, 0.28);
  color: #041A0F;
}

:focus-visible {
  outline: 2px solid var(--accent-green);
  outline-offset: 3px;
  border-radius: 4px;
}

[id] { scroll-margin-top: 96px; }

#main-content {
  display: block;
  min-height: 70vh;
  padding-top: var(--header-offset);
}

.container {
  width: min(1280px, calc(100% - 48px));
  margin-inline: auto;
}

@media (max-width: 560px) {
  .container { width: calc(100% - 32px); }
}

.mono {
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
}

/* ---------- Skip Link ---------- */
.skip-link {
  position: fixed;
  top: -80px;
  left: 24px;
  z-index: 2000;
  padding: 10px 20px;
  background: var(--accent-green);
  color: #041A0F;
  font-weight: 700;
  font-size: 14px;
  border-radius: var(--radius-pill);
  box-shadow: 0 0 24px var(--glow);
  transition: top 0.3s var(--ease);
}

.skip-link:focus { top: 16px; color: #041A0F; }

/* ---------- 顶部滚动进度 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 1600;
  background: linear-gradient(90deg, var(--accent-green), #0AB87C, var(--accent-orange));
  transform: scaleX(0);
  transform-origin: 0 50%;
  box-shadow: 0 0 14px var(--glow);
  pointer-events: none;
  will-change: transform;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1200;
  display: flex;
  justify-content: center;
  padding: 16px 16px 0;
  pointer-events: none;
}

.site-header__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: min(1120px, 100%);
  padding: 8px 10px 8px 18px;
  background: rgba(8, 16, 34, 0.86);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(0, 255, 163, 0.32);
  border-radius: var(--radius-pill);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5), 0 0 24px rgba(0, 255, 163, 0.06);
  pointer-events: auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  color: var(--text-primary);
}

.brand:hover { color: var(--text-primary); }

.brand__mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 20px;
  color: #041A0F;
  background: linear-gradient(135deg, var(--accent-green), #0AB87C);
  box-shadow: 0 0 18px rgba(0, 255, 163, 0.35);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  animation: brandPulse 3s ease-in-out infinite;
}

@keyframes brandPulse {
  0%, 100% { filter: drop-shadow(0 0 4px rgba(0, 255, 163, 0.4)); }
  50% { filter: drop-shadow(0 0 10px rgba(0, 255, 163, 0.7)); }
}

.brand__group {
  display: grid;
  gap: 1px;
  line-height: 1.15;
}

.brand__name {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.brand__sub {
  font-size: 11px;
  font-weight: 500;
  color: var(--accent-green);
  letter-spacing: 0.22em;
}

.brand__tagline {
  display: none;
  font-size: 12px;
  color: var(--text-secondary);
  border-left: 1px solid var(--border);
  padding-left: 12px;
  margin-left: 2px;
  white-space: nowrap;
}

@media (min-width: 768px) {
  .brand__tagline { display: inline; }
}

/* ---------- Nav ---------- */
.nav {
  flex: 1;
  display: flex;
  justify-content: flex-end;
  min-width: 0;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-link {
  display: block;
  padding: 9px 13px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-pill);
  white-space: nowrap;
  transition: color 0.25s var(--ease), background 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.nav-link:hover {
  color: var(--accent-green);
  background: rgba(0, 255, 163, 0.08);
}

.nav-link[aria-current="page"] {
  color: #041A0F;
  font-weight: 700;
  background: var(--accent-green);
  box-shadow: 0 0 18px rgba(0, 255, 163, 0.4);
}

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(27, 49, 89, 0.55);
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s var(--ease);
}

.nav-toggle:hover {
  border-color: var(--accent-green);
  box-shadow: 0 0 16px rgba(0, 255, 163, 0.25);
  background: rgba(0, 255, 163, 0.06);
}

.nav-toggle__bar {
  width: 18px;
  height: 2px;
  background: var(--accent-green);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.25s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) 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(-7px) rotate(-45deg);
}

@media (min-width: 960px) {
  .nav-toggle { display: none; }
}

@media (max-width: 959px) {
  .nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    display: block;
    background: rgba(8, 16, 34, 0.97);
    border: 1px solid rgba(0, 255, 163, 0.28);
    border-radius: 20px;
    padding: 12px;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.55);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), visibility 0.3s;
  }

  .nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .nav-link {
    padding: 13px 16px;
    font-size: 15px;
    border-radius: 12px;
  }

  .nav-link[aria-current="page"] {
    background: rgba(0, 255, 163, 0.12);
    color: var(--accent-green);
    box-shadow: inset 3px 0 0 var(--accent-green);
  }
}

@media (max-width: 640px) {
  .site-header { padding: 12px 12px 0; }
  .site-header__inner { padding-left: 14px; padding-right: 8px; }
}

/* ---------- Footer ---------- */
.site-footer {
  position: relative;
  margin-top: 96px;
  background: linear-gradient(180deg, var(--bg-primary) 0%, #060B18 100%);
  border-top: 1px solid var(--border);
  overflow: hidden;
}

.site-footer__deco {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.7;
}

.site-footer__deco::before {
  content: "";
  position: absolute;
  top: -160px;
  right: -120px;
  width: 420px;
  height: 420px;
  background: repeating-linear-gradient(115deg, rgba(0, 255, 163, 0.1) 0, rgba(0, 255, 163, 0.1) 2px, transparent 2px, transparent 16px);
  clip-path: polygon(25% 0, 100% 0, 100% 100%, 0 72%);
  opacity: 0.4;
}

.site-footer__deco::after {
  content: "";
  position: absolute;
  bottom: -120px;
  left: -60px;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(255, 107, 53, 0.08), transparent 65%);
}

.site-footer__inner {
  position: relative;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 68px 24px 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px 32px;
}

@media (min-width: 640px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 1024px) {
  .footer-grid { grid-template-columns: 1.5fr 0.8fr 0.8fr 1.2fr; }
}

.footer-brand { max-width: 42ch; }

.footer-brand__name {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.02em;
}

.footer-brand__sub {
  display: inline-block;
  margin-left: 8px;
  padding-left: 12px;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent-green);
  border-left: 2px solid var(--accent-green);
}

.footer-brand__tagline {
  margin-top: 12px;
  font-family: var(--font-data);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--accent-orange);
}

.footer-brand__trust {
  margin-top: 14px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.footer-col__title {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.12em;
  padding-bottom: 12px;
  margin-bottom: 18px;
  position: relative;
}

.footer-col__title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 30px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-green), transparent);
  border-radius: 2px;
}

.footer-list {
  display: grid;
  gap: 10px;
}

.footer-link {
  position: relative;
  display: inline-block;
  font-size: 14px;
  color: var(--text-secondary);
  transition: color 0.25s var(--ease), transform 0.25s var(--ease);
}

.footer-link:hover {
  color: var(--accent-green);
  transform: translateX(4px);
}

.footer-link::before {
  content: "→";
  margin-right: 6px;
  color: var(--accent-green);
  opacity: 0.7;
}

.footer-contact__item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary);
}

.footer-contact__label {
  flex-shrink: 0;
  font-family: var(--font-data);
  font-size: 11px;
  font-weight: 700;
  color: var(--accent-green);
  border: 1px solid rgba(0, 255, 163, 0.3);
  border-radius: 4px;
  padding: 1px 6px;
  background: rgba(0, 255, 163, 0.06);
  letter-spacing: 0.08em;
}

.footer-bottom {
  margin-top: 52px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  justify-content: space-between;
  align-items: center;
}

.footer-copy,
.footer-icp {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--text-secondary);
}

.footer-icp {
  color: #7BA4C8;
  letter-spacing: 0.04em;
}

/* ---------- Back to Top ---------- */
.back-to-top {
  position: fixed;
  right: 26px;
  bottom: 26px;
  z-index: 900;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(27, 49, 89, 0.9);
  border: 1px solid var(--accent-green);
  color: var(--accent-green);
  box-shadow: 0 0 20px rgba(0, 255, 163, 0.15);
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), visibility 0.3s, background 0.3s, color 0.3s;
}

.back-to-top:hover {
  background: var(--accent-green);
  color: #041A0F;
  box-shadow: 0 0 30px rgba(0, 255, 163, 0.4);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  font-size: 15px;
  font-weight: 700;
  font-family: var(--font-body);
  border-radius: var(--radius-pill);
  text-decoration: none;
  line-height: 1.2;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), background 0.3s var(--ease), color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.btn--primary {
  background: var(--accent-green);
  color: #041A0F;
  box-shadow: 0 0 22px rgba(0, 255, 163, 0.25);
}

.btn--primary:hover {
  background: #00D98E;
  color: #041A0F;
  transform: translateY(-2px);
  box-shadow: 0 10px 32px rgba(0, 255, 163, 0.35);
}

.btn--secondary {
  background: transparent;
  color: var(--accent-green);
  border: 1px solid var(--accent-green);
}

.btn--secondary:hover {
  background: rgba(0, 255, 163, 0.08);
  color: var(--accent-green);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(0, 255, 163, 0.15);
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.breadcrumb a {
  color: var(--text-secondary);
  transition: color 0.25s;
}

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

.breadcrumb__sep { color: var(--border); }

.breadcrumb__current { color: var(--accent-green); font-weight: 500; }

/* ---------- Page Header ---------- */
.page-header {
  position: relative;
  padding: 48px 0 56px;
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(circle at 82% 30%, rgba(0, 255, 163, 0.08), transparent 38%),
    linear-gradient(rgba(0, 255, 163, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 163, 0.04) 1px, transparent 1px);
  background-size: auto, 44px 44px, 44px 44px;
}

.page-header::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  width: 220px;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent-green));
}

.page-header__inner {
  display: grid;
  gap: 14px;
}

.page-header__lead {
  max-width: 60ch;
  font-size: 17px;
  line-height: 1.7;
  color: var(--text-secondary);
}

/* ---------- Sections ---------- */
.section { padding: 72px 0; }

.section__header { margin-bottom: 44px; position: relative; }

.section__eyebrow {
  display: inline-block;
  margin-bottom: 12px;
  padding: 5px 14px;
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--accent-green);
  border: 1px solid rgba(0, 255, 163, 0.35);
  border-radius: var(--radius-pill);
  background: rgba(0, 255, 163, 0.05);
}

.section__lead {
  margin-top: 14px;
  max-width: 58ch;
  font-size: 18px;
  line-height: 1.75;
  color: var(--text-secondary);
}

@media (max-width: 640px) {
  .section { padding: 56px 0; }
}

/* ---------- Grid & Split ---------- */
.grid {
  display: grid;
  gap: 24px;
}

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

@media (min-width: 768px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
  align-items: center;
}

@media (min-width: 1024px) {
  .split {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 60px;
  }
  .split--46 { grid-template-columns: 4fr 6fr; }
  .split--64 { grid-template-columns: 6fr 4fr; }
}

/* ---------- Card ---------- */
.card {
  display: block;
  background: linear-gradient(160deg, var(--bg-secondary) 0%, var(--bg-panel) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 26px;
  position: relative;
  overflow: hidden;
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--accent-green), transparent);
  opacity: 0.6;
  transition: opacity 0.35s;
}

.card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 255, 163, 0.45);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35), 0 0 20px rgba(0, 255, 163, 0.07);
}

.card:hover::before { opacity: 1; }

.card__title { font-size: 18px; font-weight: 700; }

.card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--accent-green);
}

.card__text {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-secondary);
}

/* ---------- Panel ---------- */
.panel {
  position: relative;
  background: linear-gradient(135deg, rgba(27, 49, 89, 0.6), rgba(18, 34, 74, 0.9));
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 30px;
}

.panel::after {
  content: attr(data-label);
  position: absolute;
  top: 12px;
  right: 14px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--text-secondary);
  opacity: 0.7;
}

/* ---------- Data Elements ---------- */
.data-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  font-family: var(--font-data);
  font-size: 13px;
  font-weight: 700;
  color: var(--accent-green);
  background: rgba(0, 255, 163, 0.08);
  border: 1px solid rgba(0, 255, 163, 0.3);
  border-radius: var(--radius-pill);
}

.data-chip--orange {
  color: var(--accent-orange);
  background: rgba(255, 107, 53, 0.08);
  border-color: rgba(255, 107, 53, 0.3);
}

.data-stat {
  font-family: var(--font-data);
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--accent-green);
  text-shadow: 0 0 24px rgba(0, 255, 163, 0.3);
}

.data-stat--orange {
  color: var(--accent-orange);
  text-shadow: 0 0 24px rgba(255, 107, 53, 0.28);
}

.divider {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, transparent, var(--border) 20%, var(--border) 80%, transparent);
  margin: 40px 0;
}

/* ---------- Image Placeholder ---------- */
.img-ratio {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--radius-card);
  background: var(--bg-panel);
}

.img-ratio::before {
  content: "";
  display: block;
  padding-top: 62.5%;
}

.img-ratio--16x9::before { padding-top: 56.25%; }
.img-ratio--4x3::before { padding-top: 75%; }
.img-ratio--1x1::before { padding-top: 100%; }

.img-ratio > img,
.img-ratio > svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background-color: var(--bg-panel);
  background-image:
    linear-gradient(rgba(0, 255, 163, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 163, 0.06) 1px, transparent 1px);
  background-size: 24px 24px;
  color: var(--text-secondary);
  font-size: 13px;
  letter-spacing: 0.14em;
  font-family: var(--font-data);
}

.img-placeholder::before {
  content: "IMG";
  display: inline-block;
  padding: 4px 10px;
  border: 1px solid rgba(0, 255, 163, 0.3);
  border-radius: 4px;
  color: var(--accent-green);
  background: rgba(10, 20, 40, 0.6);
}

/* ---------- Clip Geometry ---------- */
.clip-slant {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 36px), 0 100%);
}

.clip-slant--reverse {
  clip-path: polygon(0 36px, 100% 0, 100% 100%, 0 100%);
}

/* ---------- Reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.is-revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal[data-reveal-delay="1"] { transition-delay: 0.12s; }
.reveal[data-reveal-delay="2"] { transition-delay: 0.24s; }
.reveal[data-reveal-delay="3"] { transition-delay: 0.36s; }

/* ---------- Reduced Motion ---------- */
@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;
    transition-delay: 0s !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .nav,
  .back-to-top {
    transition: none;
  }
}