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

ul,
ol {
  list-style: none;
}

a {
  text-decoration: none;
  color: inherit;
}

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

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

html {
  scroll-behavior: smooth;
}

:root {
  --color-bg: #0b1526;
  --color-bg-panel: #1e3a8a;
  --color-accent: #00ff9d;
  --color-gold: #ffd700;
  --color-cyan: #67e8f9;
  --color-text: #f8fafc;
  --color-muted: #94a3b8;
  --glass-panel: rgba(255, 255, 255, 0.06);
  --border-soft: rgba(255, 255, 255, 0.08);
  --header-height: 76px;
  --rail-width: 64px;
  --content-gutter: clamp(1.25rem, 4vw, 3rem);
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --font-serif: "思源宋体", "Noto Serif SC", serif;
  --font-sans: "思源黑体", "Noto Sans SC", sans-serif;
  --shadow-accent: 0 0 24px rgba(0, 255, 157, 0.18);
}

body {
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: 1rem;
  line-height: 1.8;
  min-height: 100vh;
  background-color: var(--color-bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 100% 0%, rgba(30, 58, 138, 0.38) 0%, transparent 60%),
    radial-gradient(ellipse 55% 38% at 0% 100%, rgba(0, 255, 157, 0.06) 0%, transparent 55%);
  background-attachment: fixed;
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(103, 232, 249, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(103, 232, 249, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-sans);
  font-weight: 800;
  line-height: 1.32;
  letter-spacing: -0.015em;
  color: var(--color-text);
}

h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
}

h2 {
  font-size: clamp(1.6rem, 3.2vw, 2.4rem);
}

h3 {
  font-size: clamp(1.15rem, 1.8vw, 1.5rem);
}

h4 {
  font-size: 1.05rem;
}

p {
  color: var(--color-muted);
  margin-bottom: 1.2rem;
}

strong {
  font-weight: 800;
  color: var(--color-text);
}

a {
  transition: color 0.2s ease;
}

::selection {
  background: rgba(0, 255, 157, 0.25);
  color: var(--color-text);
}

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

[id] {
  scroll-margin-top: calc(var(--header-height) + 12px);
}

.skip-link {
  position: fixed;
  top: -120px;
  left: 1rem;
  z-index: 2000;
  padding: 0.6rem 1.2rem;
  background: var(--color-accent);
  color: #03110a;
  border-radius: 0 0 14px 14px;
  font-weight: 800;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  box-shadow: var(--shadow-accent);
  transition: top 0.25s ease;
}

.skip-link:focus-visible {
  top: 0;
  outline: none;
}

.container {
  width: 100%;
  max-width: calc(1440px - var(--rail-width));
  margin-right: auto;
  padding-right: var(--content-gutter);
  padding-left: var(--content-gutter);
}

#main-content {
  position: relative;
  z-index: 1;
  padding-left: var(--rail-width);
  min-height: 70vh;
  scroll-margin-top: calc(var(--header-height) + 8px);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.9rem;
  line-height: 1;
  letter-spacing: 0.05em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease, background-color 0.25s ease, color 0.25s ease;
}

.btn-primary {
  background: var(--color-accent);
  color: #03110a;
  box-shadow: 0 0 20px rgba(0, 255, 157, 0.16);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 34px rgba(0, 255, 157, 0.35);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border-color: rgba(255, 255, 255, 0.28);
}

.btn-ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(11, 21, 38, 0.9);
  border-bottom: 1px solid var(--border-soft);
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-cyan) 45%, transparent 75%);
  opacity: 0.4;
  pointer-events: none;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  max-width: 1440px;
  margin-right: auto;
  padding-right: var(--content-gutter);
  padding-left: calc(var(--rail-width) + var(--content-gutter));
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  white-space: nowrap;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(30, 58, 138, 0.9), rgba(11, 21, 38, 0.95));
  border: 1px solid rgba(0, 255, 157, 0.32);
  box-shadow: 0 0 18px rgba(0, 255, 157, 0.12), inset 0 0 12px rgba(103, 232, 249, 0.05);
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  position: relative;
  overflow: hidden;
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 35%, rgba(0, 255, 157, 0.22) 50%, transparent 65%);
  transform: translateX(-100%);
  transition: transform 0.7s ease;
}

.brand:hover .brand-mark::after {
  transform: translateX(100%);
}

.brand:hover .brand-mark {
  box-shadow: 0 0 28px rgba(0, 255, 157, 0.3);
}

.brand-name {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: 0.18em;
  color: var(--color-text);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.4vw, 2.6rem);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(0.3rem, 1.2vw, 1.4rem);
}

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-block;
  padding: 0.45rem 0.55rem;
  font-size: 0.93rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--color-muted);
  position: relative;
  transition: color 0.25s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0.55rem;
  right: 0.55rem;
  bottom: 0.2rem;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-cyan));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s cubic-bezier(0.65, 0, 0.35, 1);
}

.nav-link:hover {
  color: var(--color-text);
}

.nav-link:hover::after,
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav-link[aria-current="page"] {
  color: var(--color-accent);
}

.nav-cta {
  padding: 0.55rem 1.2rem;
  font-size: 0.88rem;
}

.nav-toggle {
  display: none;
  position: relative;
  z-index: 1003;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: var(--glass-panel);
}

.nav-toggle-line {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-text);
  transition: transform 0.3s ease;
}

.nav-toggle-line:first-child {
  transform: translate(-50%, calc(-50% - 4px));
}

.nav-toggle-line:last-child {
  transform: translate(-50%, calc(-50% + 4px));
}

.brand-rail {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 995;
  width: var(--rail-width);
  pointer-events: none;
  border-right: 1px solid var(--border-soft);
  background: rgba(11, 21, 38, 0.55);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: calc(var(--header-height) + 1.25rem);
  padding-bottom: 2rem;
}

.brand-rail::before {
  content: "";
  width: 1px;
  flex: 1;
  background: linear-gradient(180deg, rgba(103, 232, 249, 0.18), rgba(255, 215, 0, 0.28));
  border-radius: 2px;
}

.brand-rail::after {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-gold);
  box-shadow: 0 0 14px rgba(255, 215, 0, 0.7);
  position: absolute;
  top: calc(var(--header-height) + 0.6rem);
  left: 50%;
  transform: translateX(-50%);
}

.brand-rail-fill {
  position: absolute;
  top: calc(var(--header-height) + 1.25rem);
  left: 50%;
  transform: translateX(-50%);
  width: 3px;
  height: 0;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--color-accent), var(--color-cyan));
  box-shadow: 0 0 16px rgba(0, 255, 157, 0.5);
  transition: height 0.2s linear;
}

.brand-rail-label {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  margin-top: 1.25rem;
  font-size: 0.7rem;
  letter-spacing: 0.6em;
  color: rgba(255, 255, 255, 0.28);
  text-transform: uppercase;
  font-weight: 600;
}

.scroll-top-btn {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  z-index: 980;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid rgba(0, 255, 157, 0.4);
  background: rgba(11, 21, 38, 0.82);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  color: var(--color-accent);
  font-size: 1.15rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease, background-color 0.3s ease, color 0.3s ease;
}

.scroll-top-btn[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top-btn:hover {
  background: var(--color-accent);
  color: #03110a;
  box-shadow: 0 0 28px rgba(0, 255, 157, 0.4);
}

.site-footer {
  position: relative;
  z-index: 1;
  margin-top: 4rem;
  background:
    linear-gradient(180deg, rgba(30, 58, 138, 0.12), transparent 20%),
    repeating-linear-gradient(0deg, transparent, transparent 63px, rgba(103, 232, 249, 0.022) 64px);
  border-top: 1px solid var(--border-soft);
}

.footer-top {
  max-width: 1440px;
  margin-right: auto;
  padding: 4.5rem var(--content-gutter) 3rem calc(var(--rail-width) + var(--content-gutter));
  display: grid;
  grid-template-columns: 2fr 1.4fr 1.4fr 1.2fr;
  gap: clamp(1.5rem, 4vw, 4rem);
}

.footer-info .brand {
  margin-bottom: 1.1rem;
}

.footer-tagline {
  font-size: 1.02rem;
  color: var(--color-text);
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 0.4rem;
}

.footer-desc {
  font-size: 0.88rem;
  color: var(--color-muted);
  max-width: 34ch;
}

.footer-heading {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-cyan);
  margin-bottom: 1.1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--border-soft);
}

.footer-nav-list,
.footer-contact-list,
.footer-legal-list {
  display: grid;
  gap: 0.55rem;
}

.footer-nav-list a,
.footer-legal-list a {
  font-size: 0.92rem;
  color: var(--color-muted);
  display: inline-block;
  transition: color 0.2s ease, transform 0.2s ease;
}

.footer-nav-list a:hover,
.footer-legal-list a:hover {
  color: var(--color-accent);
  transform: translateX(4px);
}

.footer-contact-list li {
  font-size: 0.88rem;
  color: var(--color-muted);
  line-height: 1.7;
}

.footer-bottom {
  max-width: 1440px;
  margin-right: auto;
  padding: 1.4rem var(--content-gutter) 1.6rem calc(var(--rail-width) + var(--content-gutter));
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem 1.5rem;
  border-top: 1px solid var(--border-soft);
}

.footer-copy,
.footer-icp {
  margin: 0;
  font-size: 0.83rem;
  color: inherit;
}

.lead {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  color: var(--color-text);
  font-weight: 300;
  line-height: 1.7;
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  margin-bottom: 2rem;
}

.section-index {
  display: inline-block;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 1.05rem;
  line-height: 1;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  font-style: italic;
  transform: skewX(-8deg);
  padding-right: 0.1em;
}

.section-title {
  font-family: var(--font-sans);
  font-size: clamp(1.6rem, 3.2vw, 2.4rem);
  font-weight: 800;
  line-height: 1.32;
  letter-spacing: -0.015em;
  color: var(--color-text);
}

.text-serif {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.text-slant {
  display: inline-block;
  font-style: italic;
  transform: skewX(-6deg);
  font-weight: 800;
}

.data-accent,
.data-gold,
.data-cyan {
  font-family: var(--font-sans);
  font-weight: 800;
  font-style: italic;
  font-variant-numeric: tabular-nums;
  display: inline-block;
  transform: skewX(-8deg);
}

.data-accent {
  color: var(--color-accent);
}

.data-gold {
  color: var(--color-gold);
}

.data-cyan {
  color: var(--color-cyan);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.9rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(103, 232, 249, 0.3);
  background: rgba(103, 232, 249, 0.05);
  color: var(--color-cyan);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.4;
}

.tag-gold {
  border-color: rgba(255, 215, 0, 0.35);
  background: rgba(255, 215, 0, 0.05);
  color: var(--color-gold);
}

.tag-green {
  border-color: rgba(0, 255, 157, 0.35);
  background: rgba(0, 255, 157, 0.05);
  color: var(--color-accent);
}

.panel {
  position: relative;
  background: var(--glass-panel);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.panel:hover {
  border-color: rgba(0, 255, 157, 0.3);
  box-shadow: var(--shadow-accent);
}

.grid-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.grid-card.cols-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-card.cols-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--color-muted);
  padding: 1.2rem 0 0;
}

.breadcrumb a {
  color: var(--color-muted);
  transition: color 0.2s ease;
}

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

.breadcrumb-sep {
  color: rgba(255, 255, 255, 0.2);
}

.breadcrumb-current {
  color: var(--color-text);
}

.figure {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-soft);
  background:
    radial-gradient(ellipse at 30% 20%, rgba(30, 58, 138, 0.5), transparent 55%),
    linear-gradient(135deg, rgba(30, 58, 138, 0.35), rgba(11, 21, 38, 0.6));
  aspect-ratio: 16 / 9;
}

.figure--wide {
  aspect-ratio: 21 / 9;
}

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

.figure--square {
  aspect-ratio: 1 / 1;
}

.figure img,
.figure svg,
.figure canvas {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.figure-empty::before {
  content: attr(data-label);
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  text-align: center;
  color: rgba(148, 163, 184, 0.8);
  font-size: 0.85rem;
  letter-spacing: 0.18em;
  font-weight: 600;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-reveal][data-revealed] {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1023px) {
  .header-inner,
  .footer-top,
  .footer-bottom {
    padding-left: var(--content-gutter);
  }

  .nav-toggle {
    display: block;
  }

  .main-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 1002;
    flex-direction: column;
    justify-content: center;
    gap: 2.4rem;
    background: rgba(11, 21, 38, 0.96);
    -webkit-backdrop-filter: blur(24px);
    backdrop-filter: blur(24px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(24px);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
  }

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

  .nav-list {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }

  .nav-link {
    font-size: 1.3rem;
    padding: 0.6rem 1.2rem;
  }

  .nav-link::after {
    display: none;
  }

  .nav-link[aria-current="page"] {
    background: rgba(0, 255, 157, 0.1);
    border-radius: var(--radius-pill);
  }

  body.nav-open {
    overflow: hidden;
  }

  body.nav-open .nav-toggle-line:first-child {
    transform: translate(-50%, -50%) rotate(45deg);
  }

  body.nav-open .nav-toggle-line:last-child {
    transform: translate(-50%, -50%) rotate(-45deg);
  }

  body.nav-open .nav-toggle {
    border-color: rgba(0, 255, 157, 0.45);
  }

  .brand-rail {
    display: none;
  }

  #main-content {
    padding-left: 0;
  }

  .container {
    max-width: 1440px;
  }

  .grid-card.cols-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .brand-name {
    font-size: 1rem;
    letter-spacing: 0.1em;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
  }

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

@media (max-width: 600px) {
  .footer-top {
    grid-template-columns: 1fr;
  }

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

@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;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}