:root {
  --dc-ink: #10122b;
  --dc-night: #080a22;
  --dc-blue: #5865f2;
  --dc-violet: #7b4dff;
  --dc-cyan: #5ee7f7;
  --dc-paper: #f7f8ff;
  --dc-muted: #62677c;
  --dc-border: rgba(16, 18, 43, 0.12);
  --dc-radius: 24px;
  --dc-shadow: 0 22px 60px rgba(21, 24, 76, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
}

body.dc-subpage {
  background: var(--dc-paper);
  color: var(--dc-ink);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  line-height: 1.75;
}

.dc-site-header {
  position: absolute;
  z-index: 1000;
  top: 0;
  left: 0;
  width: 100%;
  color: #fff;
}

.dc-subpage .dc-site-header {
  position: sticky;
  background: rgba(8, 10, 34, 0.96);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(16px);
}

.dc-nav-shell {
  width: min(1180px, calc(100% - 40px));
  min-height: 82px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.dc-brand {
  display: inline-flex;
  align-items: center;
  color: inherit;
  text-decoration: none;
  white-space: nowrap;
}

.dc-brand-logo {
  display: block;
  width: 146px;
  max-width: 38vw;
  height: auto;
}

.dc-main-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 7px;
}

.dc-main-nav a {
  color: rgba(255, 255, 255, 0.84);
  text-decoration: none;
  font-size: 14px;
  font-weight: 650;
  padding: 10px 12px;
  border-radius: 999px;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.dc-main-nav a:hover,
.dc-main-nav a[aria-current="page"] {
  color: #fff;
  background: rgba(255, 255, 255, 0.14);
  transform: translateY(-1px);
}

.dc-language-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 54px;
  min-height: 38px;
  margin-left: 5px;
  padding: 8px 13px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  font: inherit;
  font-size: 13px;
  font-weight: 750;
  letter-spacing: 0.02em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.dc-language-toggle:hover,
.dc-language-toggle:focus-visible {
  border-color: rgba(255, 255, 255, 0.62);
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
  outline: none;
}

.dc-nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font: inherit;
  font-size: 22px;
  cursor: pointer;
}

.dc-subpage-main {
  min-height: 65vh;
}

.dc-page-hero {
  position: relative;
  overflow: hidden;
  padding: 96px 20px 88px;
  color: #fff;
  background:
    radial-gradient(circle at 18% 20%, rgba(94, 231, 247, 0.35), transparent 30%),
    radial-gradient(circle at 84% 70%, rgba(176, 139, 255, 0.34), transparent 28%),
    linear-gradient(135deg, #080a22 8%, #22227d 54%, #5865f2 100%);
}

.dc-page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.32;
  background-image: radial-gradient(rgba(255,255,255,.85) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: linear-gradient(to bottom, #000, transparent);
  pointer-events: none;
}

.dc-page-hero-inner {
  position: relative;
  z-index: 1;
  width: min(960px, 100%);
  margin: 0 auto;
  text-align: center;
}

.dc-eyebrow {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 5px 14px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  font-size: 13px;
  font-weight: 750;
  letter-spacing: 0.12em;
}

.dc-page-hero h1 {
  max-width: 820px;
  margin: 22px auto 18px;
  font-size: clamp(42px, 7vw, 76px);
  line-height: 1.04;
  letter-spacing: -0.055em;
}

.dc-page-hero p {
  max-width: 720px;
  margin: 0 auto;
  color: rgba(255, 255, 255, 0.78);
  font-size: clamp(17px, 2vw, 21px);
}

.dc-content-shell {
  width: min(1100px, calc(100% - 40px));
  margin: -36px auto 90px;
  position: relative;
  z-index: 2;
}

.dc-panel {
  padding: clamp(28px, 5vw, 58px);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: var(--dc-radius);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--dc-shadow);
}

.dc-panel + .dc-panel {
  margin-top: 24px;
}

.dc-panel h2 {
  margin: 0 0 14px;
  font-size: clamp(25px, 3vw, 36px);
  line-height: 1.2;
  letter-spacing: -0.035em;
}

.dc-panel h3 {
  margin: 30px 0 8px;
  font-size: 20px;
  line-height: 1.35;
}

.dc-panel p,
.dc-panel li {
  color: var(--dc-muted);
}

.dc-panel a {
  color: #4652d9;
}

.dc-panel ul,
.dc-panel ol {
  padding-left: 1.35em;
}

.dc-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.dc-card {
  padding: 26px;
  border: 1px solid var(--dc-border);
  border-radius: 20px;
  background: #fff;
  box-shadow: 0 14px 38px rgba(25, 28, 82, 0.08);
}

.dc-card-icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  margin-bottom: 22px;
  border-radius: 15px;
  background: #eef0ff;
  color: #4652d9;
  font-size: 22px;
  font-weight: 900;
}

.dc-card-icon svg {
  display: block;
  width: 29px;
  height: 29px;
}

.dc-card h2,
.dc-card h3 {
  margin: 0 0 10px;
  font-size: 21px;
}

.dc-card p {
  margin: 0 0 20px;
  color: var(--dc-muted);
}

.dc-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 11px 20px;
  border-radius: 14px;
  background: var(--dc-blue);
  color: #fff !important;
  text-decoration: none;
  font-weight: 750;
  box-shadow: 0 12px 30px rgba(88, 101, 242, 0.28);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.dc-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 34px rgba(88, 101, 242, 0.36);
}

.dc-note {
  padding: 18px 20px;
  border-left: 4px solid var(--dc-blue);
  border-radius: 0 14px 14px 0;
  background: #f0f2ff;
  color: #484e66;
}

.dc-meta {
  margin-bottom: 30px;
  color: #85899a;
  font-size: 14px;
}

.dc-faq-list {
  display: grid;
  gap: 13px;
}

.dc-faq-list details {
  border: 1px solid var(--dc-border);
  border-radius: 16px;
  background: #fff;
  overflow: hidden;
}

.dc-faq-list summary {
  padding: 20px 22px;
  color: var(--dc-ink);
  font-weight: 750;
  cursor: pointer;
  list-style: none;
}

.dc-faq-list summary::-webkit-details-marker {
  display: none;
}

.dc-faq-list summary::after {
  content: "+";
  float: right;
  color: var(--dc-blue);
  font-size: 24px;
  line-height: 1;
}

.dc-faq-list details[open] summary::after {
  content: "−";
}

.dc-faq-answer {
  padding: 0 22px 20px;
  color: var(--dc-muted);
}

.dc-site-footer {
  position: relative;
  z-index: 10;
  padding: 52px 20px 34px;
  color: #fff;
  background: #080a22;
}

.dc-footer-shell {
  width: min(1180px, 100%);
  margin: 0 auto;
}

.dc-footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding-bottom: 30px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.dc-footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px 22px;
}

.dc-footer-links a {
  color: rgba(255, 255, 255, 0.72);
  text-decoration: none;
  font-size: 14px;
}

.dc-footer-links a:hover {
  color: #fff;
}

.dc-footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding-top: 24px;
  color: rgba(255, 255, 255, 0.46);
  font-size: 13px;
}

@media (max-width: 980px) {
  .dc-nav-toggle {
    display: grid;
    place-items: center;
  }

  .dc-main-nav {
    display: none;
    position: absolute;
    top: 74px;
    left: 20px;
    right: 20px;
    padding: 16px;
    flex-direction: column;
    align-items: stretch;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 18px;
    background: rgba(8, 10, 34, 0.98);
    box-shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
  }

  .dc-main-nav.is-open {
    display: flex;
  }

  .dc-main-nav a {
    padding: 12px 14px;
  }

  .dc-language-toggle {
    width: 100%;
    margin: 5px 0 0;
    min-height: 44px;
  }

  .dc-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 680px) {
  .dc-nav-shell {
    width: min(100% - 28px, 1180px);
    min-height: 70px;
  }

  .dc-page-hero {
    padding-top: 72px;
    padding-bottom: 70px;
  }

  .dc-page-hero h1 {
    font-size: clamp(38px, 13vw, 58px);
  }

  .dc-content-shell {
    width: min(100% - 24px, 1100px);
    margin-bottom: 60px;
  }

  .dc-panel {
    padding: 26px 20px;
    border-radius: 19px;
  }

  .dc-grid {
    grid-template-columns: 1fr;
  }

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

  .dc-footer-links {
    justify-content: 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;
  }
}