:root {
  --color-night: #0A1F44;
  --color-accent: #00FF88;
  --color-pop: #FF7A00;
  --color-steel: #1E3A5F;
  --color-cloud: #F4F7FA;
  --color-graphite: #2C3E50;
  --color-silver: #BDC3C7;
  --color-glass: rgba(255, 255, 255, 0.1);
  --color-night-deep: #061026;

  --font-display: "Source Han Sans CN", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "HarmonyOS Sans", "PingFang SC", "Microsoft YaHei", sans-serif;

  --container-width: 1200px;
  --container-narrow: 760px;
  --container-wide: 1440px;
  --radius: 6px;
  --transition: 0.25s ease;
}

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

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-graphite);
  background: var(--color-cloud);
  -webkit-font-smoothing: antialiased;
}

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

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.2;
  margin: 0 0 1rem;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); }
h3 { font-size: 1.375rem; }

p {
  margin: 0 0 1rem;
}

a {
  color: var(--color-night);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--transition);
}

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

ul[class] {
  list-style: none;
  padding: 0;
  margin: 0;
}

code,
kbd {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9em;
}

blockquote {
  margin: 0 0 1rem;
  padding: 0.5rem 1.5rem;
  border-left: 4px solid var(--color-accent);
  background: rgba(0, 0, 0, 0.04);
}

::selection {
  background: var(--color-accent);
  color: var(--color-night);
}

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

.container {
  width: min(100%, var(--container-width));
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2.5rem);
}

.container--wide {
  max-width: var(--container-wide);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(1rem, 3vw, 2.5rem);
}

.grid__item--span-4 { grid-column: span 4; }
.grid__item--span-5 { grid-column: span 5; }
.grid__item--span-6 { grid-column: span 6; }
.grid__item--span-7 { grid-column: span 7; }
.grid__item--span-8 { grid-column: span 8; }
.grid__item--start-2 { grid-column-start: 2; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9375rem;
  line-height: 1;
  border-radius: var(--radius);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition);
}

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

.btn--primary:hover {
  background: #00d96f;
  color: var(--color-night);
  box-shadow: 0 0 20px rgba(0, 255, 136, 0.3);
}

.btn--ghost {
  border-color: rgba(0, 255, 136, 0.4);
  color: var(--color-accent);
  background: transparent;
}

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

.btn--small {
  padding: 0.4rem 1rem;
  font-size: 0.8125rem;
}

.section-kicker {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--color-graphite);
  margin-bottom: 1rem;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  font-size: 0.875rem;
  color: var(--color-silver);
  padding: 0;
  margin: 2rem 0;
  list-style: none;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumb li + li::before {
  content: "/";
  color: var(--color-silver);
}

.breadcrumb a {
  color: var(--color-steel);
  text-decoration: none;
}

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

.tag {
  display: inline-block;
  padding: 0.2rem 0.75rem;
  background: rgba(0, 255, 136, 0.12);
  border: 1px solid rgba(0, 255, 136, 0.3);
  color: var(--color-night);
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.tag--pop {
  background: rgba(255, 122, 0, 0.12);
  border-color: rgba(255, 122, 0, 0.4);
  color: var(--color-pop);
}

.card {
  background: #fff;
  border: 1px solid var(--color-silver);
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: 0 2px 8px rgba(10, 31, 68, 0.06);
}

.card--data {
  border-top: 3px solid var(--color-accent);
  background: linear-gradient(180deg, #fff, var(--color-cloud));
}

.card--data strong {
  color: var(--color-night);
  font-size: 1.75rem;
}

.image-box {
  position: relative;
  display: block;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--color-steel), var(--color-night));
  border-radius: 8px;
  overflow: hidden;
}

.image-box::after {
  content: "图片占位";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8125rem;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  background: linear-gradient(135deg, rgba(10, 31, 68, 0.2), rgba(30, 58, 95, 0.4));
  border: 1px solid var(--color-glass);
  border-radius: 8px;
}

.divider {
  border: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--color-accent), transparent);
  margin: 3rem 0;
}

.skip-link {
  position: fixed;
  top: 0;
  left: 1rem;
  z-index: 10000;
  padding: 0.5rem 1rem;
  background: var(--color-accent);
  color: var(--color-night);
  font-weight: 700;
  text-decoration: none;
  transform: translateY(-120%);
  transition: transform var(--transition);
}

.skip-link:focus-visible {
  transform: translateY(0);
  outline: 2px solid #fff;
  outline-offset: 2px;
}

.site-header {
  position: relative;
  background: var(--color-night);
  color: #fff;
}

.utility-bar {
  background: var(--color-night-deep);
  border-bottom: 1px solid var(--color-glass);
  font-size: 0.8125rem;
}

.utility-bar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 36px;
}

.utility-bar__meta {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  color: var(--color-silver);
}

.utility-bar__item--divider {
  color: var(--color-accent);
  opacity: 0.5;
}

.utility-bar__action {
  color: var(--color-accent);
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.05em;
}

.utility-bar__action:hover {
  color: #fff;
}

.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding-top: clamp(1.5rem, 4vw, 2.5rem);
  padding-bottom: clamp(1rem, 3vw, 1.5rem);
  position: relative;
}

.masthead__side {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  color: var(--color-silver);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  min-width: 150px;
}

.masthead__side--left {
  text-align: left;
}

.masthead__side--right {
  text-align: right;
  align-items: flex-end;
}

.masthead__divider {
  width: 2rem;
  height: 1px;
  background: var(--color-accent);
  display: block;
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: #fff;
}

.brand-mark {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent), #00c96a);
  position: relative;
  display: block;
  flex-shrink: 0;
}

.brand-mark::before {
  content: "";
  position: absolute;
  inset: 8px;
  border-radius: 50%;
  background: var(--color-night);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.2);
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: linear-gradient(
    transparent 40%,
    rgba(255, 255, 255, 0.15) 40% 43%,
    transparent 43% 57%,
    rgba(0, 255, 136, 0.3) 57% 60%,
    transparent 60%
  );
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-name {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 900;
  letter-spacing: 0.02em;
  color: #fff;
}

.brand-tagline {
  font-size: 0.75rem;
  color: var(--color-accent);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-top: 0.1rem;
}

.mobile-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  align-items: center;
  width: 48px;
  height: 48px;
  padding: 0;
  border: 1px solid var(--color-glass);
  border-radius: var(--radius);
  background: transparent;
  cursor: pointer;
  color: #fff;
}

.mobile-nav-toggle__bar {
  width: 24px;
  height: 2px;
  background: currentColor;
  display: block;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.mobile-nav-toggle__label {
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-top: 0.15rem;
}

.site-header:has([data-nav][data-open]) .mobile-nav-toggle__bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.site-header:has([data-nav][data-open]) .mobile-nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.site-header:has([data-nav][data-open]) .mobile-nav-toggle__bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.site-header:has([data-nav][data-open]) .mobile-nav-toggle__label {
  color: var(--color-accent);
}

.data-ticker {
  background: var(--color-steel);
  overflow: hidden;
  border-top: 1px solid var(--color-glass);
  border-bottom: 1px solid var(--color-glass);
  white-space: nowrap;
}

.data-ticker__track {
  display: flex;
  width: max-content;
  animation: ticker-scroll 24s linear infinite;
  will-change: transform;
}

.data-ticker__segment {
  display: inline-flex;
  align-items: center;
  padding-right: 2rem;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.data-ticker__segment::after {
  content: "◆";
  color: var(--color-accent);
  font-size: 0.4rem;
  padding-left: 2rem;
}

@keyframes ticker-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.site-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10, 31, 68, 0.92);
  backdrop-filter: blur(8px);
  border-top: 1px solid var(--color-glass);
  border-bottom: 1px solid var(--color-glass);
}

.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 56px;
}

.nav-list {
  display: flex;
  gap: clamp(0.75rem, 2vw, 2rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-item {
  display: flex;
  align-items: center;
}

.nav-link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  letter-spacing: 0.03em;
  padding: 0.5rem 0.25rem;
  border-bottom: 3px solid transparent;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.nav-link__index {
  font-family: var(--font-body);
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--color-accent);
  opacity: 0.7;
}

.nav-link:hover {
  color: #fff;
  border-bottom-color: var(--color-accent);
}

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

.nav-login {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--color-accent);
  text-decoration: none;
  padding: 0.4rem 1rem;
  border: 1px solid rgba(0, 255, 136, 0.35);
  border-radius: var(--radius);
  transition: all var(--transition);
}

.nav-login:hover {
  background: var(--color-accent);
  color: var(--color-night);
  border-color: var(--color-accent);
}

.site-footer {
  background: var(--color-night-deep);
  color: rgba(255, 255, 255, 0.75);
  border-top: 4px solid var(--color-accent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1.5fr 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
}

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

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: #fff;
}

.footer-brand .brand-name {
  font-size: 1.5rem;
}

.footer-brand .brand-tagline {
  color: var(--color-accent);
}

.footer-note {
  margin-top: 1.25rem;
  font-size: 0.875rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
  max-width: 25rem;
}

.footer-title {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.footer-title::before {
  content: "";
  width: 2rem;
  height: 2px;
  background: var(--color-accent);
  opacity: 0.4;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color var(--transition);
}

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

.footer-contact {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: 0.4rem 1rem;
  margin-bottom: 1rem;
}

.footer-contact__label {
  color: var(--color-silver);
  font-size: 0.8125rem;
}

.footer-contact__value {
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.9375rem;
  word-break: break-all;
}

.footer-contact__note {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.6;
}

.footer-bottom {
  border-top: 1px solid var(--color-glass);
  padding-block: 1.25rem;
}

.footer-bottom__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  color: var(--color-silver);
  font-size: 0.8125rem;
}

.footer-copy,
.footer-icp {
  margin: 0;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-pop));
  z-index: 10001;
  pointer-events: none;
  border-radius: 0 3px 3px 0;
  box-shadow: 0 0 12px rgba(0, 255, 136, 0.5);
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 767px) {
  .mobile-nav-toggle {
    display: flex;
  }

  .masthead__side {
    display: none;
  }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    width: min(80%, 320px);
    height: 100vh;
    height: 100dvh;
    background: var(--color-night);
    border: none;
    transform: translateX(100%);
    visibility: hidden;
    transition: transform 0.3s ease, visibility 0s linear 0.3s;
    box-shadow: -20px 0 60px rgba(0, 0, 0, 0.35);
    overflow-y: auto;
  }

  .site-nav[data-open] {
    transform: translateX(0);
    visibility: visible;
    transition: transform 0.3s ease;
  }

  .site-nav__inner {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    min-height: 100%;
    padding-block: 4rem 2rem;
  }

  .nav-list {
    flex-direction: column;
    gap: 0;
  }

  .nav-item {
    border-bottom: 1px solid var(--color-glass);
  }

  .nav-link {
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
    padding: 1rem 0.5rem;
    font-size: 1.0625rem;
    border-bottom: none;
  }

  .nav-link[aria-current="page"] {
    background: var(--color-glass);
    border-left: 4px solid var(--color-accent);
  }

  .nav-login {
    margin-top: auto;
    text-align: center;
    padding: 0.75rem 1rem;
  }
}

@media (max-width: 567px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@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-ticker__track {
    animation: none !important;
  }

  .site-nav[data-open] {
    transition: none;
  }
}