.portal-page {
  --portal-bg: #020711;
  --portal-panel: rgba(10, 22, 38, 0.72);
  --portal-line: rgba(126, 176, 226, 0.24);
  --portal-ink: #edf4fb;
  --portal-muted: #9db4cc;
  --portal-accent: #63b3ff;
  --portal-accent-strong: #2b8bff;
  --portal-radius: 16px;
  margin: 0;
  background: radial-gradient(1200px 600px at 78% -8%, rgba(43, 139, 255, 0.22), transparent 60%), var(--portal-bg);
  color: var(--portal-ink);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  line-height: 1.7;
}
.portal-page * { box-sizing: border-box; }
.portal-page a { color: inherit; text-decoration: none; }
.portal-page img { max-width: 100%; height: auto; display: block; }
.portal-shell { width: min(1120px, 100% - 48px); margin-inline: auto; }

.portal-header { position: sticky; top: 0; z-index: 20; backdrop-filter: blur(14px); background: rgba(2, 7, 17, 0.78); border-bottom: 1px solid var(--portal-line); }
.portal-header-inner { display: flex; align-items: center; gap: 24px; min-height: 68px; }
.portal-brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 600; letter-spacing: 0.02em; }
.portal-brand img { width: 108px; height: auto; }
.portal-nav { display: flex; gap: 20px; margin-inline-start: auto; font-size: 15px; }
.portal-nav a { color: var(--portal-muted); padding: 6px 2px; border-bottom: 2px solid transparent; }
.portal-nav a[aria-current="page"], .portal-nav a:hover { color: var(--portal-ink); border-bottom-color: var(--portal-accent); }
.portal-lang { position: relative; }
.portal-lang summary { list-style: none; cursor: pointer; border: 1px solid var(--portal-line); border-radius: 999px; padding: 6px 14px; font-size: 14px; color: var(--portal-muted); }
.portal-lang summary::-webkit-details-marker { display: none; }
.portal-lang-list { position: absolute; inset-inline-end: 0; top: calc(100% + 8px); display: grid; gap: 2px; min-width: 176px; max-height: 320px; overflow: auto; padding: 8px; background: #071528; border: 1px solid var(--portal-line); border-radius: 12px; box-shadow: 0 18px 48px rgba(0, 0, 0, 0.45); }
.portal-lang-list a { padding: 7px 10px; border-radius: 8px; font-size: 14px; color: var(--portal-muted); }
.portal-lang-list a:hover, .portal-lang-list a[aria-current="true"] { background: rgba(99, 179, 255, 0.14); color: var(--portal-ink); }

.portal-main { display: block; }
.portal-hero { padding: 72px 0 40px; width: min(1120px, 100% - 48px); margin-inline: auto; }
.portal-hero-split { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); gap: 48px; align-items: center; }
.portal-hero h1 { font-size: clamp(30px, 4.2vw, 52px); line-height: 1.16; margin: 12px 0 16px; letter-spacing: -0.01em; }
.portal-kicker { display: inline-flex; align-items: center; gap: 8px; margin: 0; color: var(--portal-accent); font-size: 13px; letter-spacing: 0.14em; text-transform: uppercase; }
.portal-kicker span { width: 8px; height: 8px; border-radius: 50%; background: var(--portal-accent); box-shadow: 0 0 12px var(--portal-accent); }
.portal-lead { color: var(--portal-muted); font-size: 17px; max-width: 62ch; }
.portal-status { color: var(--portal-muted); font-size: 14px; }
.portal-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
.portal-button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 1px solid transparent; border-radius: 999px; padding: 11px 22px; font-size: 15px; font-weight: 600; cursor: pointer; background: linear-gradient(135deg, var(--portal-accent), var(--portal-accent-strong)); color: #04101f; }
.portal-button-secondary { background: transparent; border-color: var(--portal-line); color: var(--portal-ink); }
.portal-error { color: #ffb4b4; font-size: 14px; margin-top: 10px; }
.portal-hero-figure { margin: 0; }
.portal-hero-figure img { border-radius: var(--portal-radius); border: 1px solid var(--portal-line); box-shadow: 0 26px 60px rgba(0, 0, 0, 0.5); }

.portal-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(248px, 1fr)); gap: 18px; width: min(1120px, 100% - 48px); margin: 16px auto 40px; }
.portal-card { display: flex; flex-direction: column; background: var(--portal-panel); border: 1px solid var(--portal-line); border-radius: var(--portal-radius); overflow: hidden; transition: transform 0.2s ease, border-color 0.2s ease; }
.portal-card:hover { transform: translateY(-3px); border-color: rgba(99, 179, 255, 0.5); }
.portal-card-media { background: rgba(7, 21, 40, 0.85); }
.portal-card-media img { aspect-ratio: 8 / 5; object-fit: cover; width: 100%; }
.portal-card-body { display: grid; gap: 8px; padding: 16px 18px 20px; }
.portal-card-body strong { font-size: 18px; }
.portal-card-body span { color: var(--portal-muted); font-size: 14.5px; }
.portal-card-body em { color: var(--portal-accent); font-style: normal; font-size: 14px; font-weight: 600; }

.portal-section { width: min(1120px, 100% - 48px); margin: 8px auto 40px; padding: 26px 28px; background: var(--portal-panel); border: 1px solid var(--portal-line); border-radius: var(--portal-radius); }
.portal-section h2 { margin: 0 0 12px; font-size: 22px; }
.portal-section p { margin: 0 0 10px; color: var(--portal-muted); }
.portal-section-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 26px; }
.portal-limits { border-color: rgba(255, 196, 120, 0.32); }
.portal-contact-methods { display: grid; gap: 10px; margin-top: 14px; }
.portal-contact-methods a { display: flex; justify-content: space-between; gap: 16px; padding: 12px 14px; border: 1px solid var(--portal-line); border-radius: 12px; }
.portal-contact-methods span { color: var(--portal-muted); font-size: 13px; letter-spacing: 0.1em; text-transform: uppercase; }
.portal-contact-methods p { margin: 0; }

.portal-text-link { color: var(--portal-accent); font-weight: 600; }
.portal-ai-support .portal-kicker { margin: 0 0 8px; }
.portal-ai-lead { margin: 0 0 18px; color: var(--portal-muted); max-width: 72ch; }
.portal-ai-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }
.portal-ai-card { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 15px 18px; border: 1px solid var(--portal-line); border-radius: 12px; background: rgba(7, 21, 40, 0.6); color: var(--portal-ink); font-weight: 600; transition: border-color 0.2s ease, transform 0.2s ease; }
.portal-ai-card:hover { border-color: var(--portal-accent); transform: translateY(-1px); }
.portal-ai-card span { color: var(--portal-accent); font-weight: 700; }

.portal-related { width: min(1120px, 100% - 48px); margin: 0 auto 56px; }
.portal-related h2 { font-size: 20px; }
.portal-related .portal-cards { width: 100%; margin-inline: 0; }

.portal-footer { border-top: 1px solid var(--portal-line); background: rgba(2, 7, 17, 0.9); padding: 44px 0 26px; margin-top: 32px; }
.portal-footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 28px; }
.portal-footer-grid h2 { font-size: 14px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--portal-muted); margin: 0 0 12px; }
.portal-footer-grid a { display: block; padding: 5px 0; color: var(--portal-muted); font-size: 14.5px; }
.portal-footer-grid a:hover { color: var(--portal-ink); }
.portal-footer-brand p { margin: 10px 0 6px; font-weight: 600; }
.portal-footer-bottom { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 30px; padding-top: 18px; border-top: 1px solid var(--portal-line); color: var(--portal-muted); font-size: 13.5px; }

@media (max-width: 760px) {
  .portal-hero { padding-top: 44px; }
  .portal-hero-split { grid-template-columns: 1fr; gap: 28px; }
  .portal-header-inner { flex-wrap: wrap; gap: 12px; padding-block: 10px; }
  .portal-nav { order: 3; width: 100%; overflow-x: auto; }
  .portal-section { padding: 20px 18px; }
}

.portal-features { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; list-style: none; padding: 0; margin: 0; }
.portal-features li { position: relative; padding: 14px 16px 14px 40px; border: 1px solid var(--portal-line); border-radius: 12px; background: rgba(7, 21, 40, 0.6); color: var(--portal-ink); font-size: 15.5px; }
.portal-features li::before { content: ""; position: absolute; inset-inline-start: 14px; top: 19px; width: 10px; height: 10px; border-radius: 50%; background: linear-gradient(135deg, var(--portal-accent), var(--portal-accent-strong)); box-shadow: 0 0 10px rgba(99, 179, 255, 0.45); }
.portal-steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.portal-steps li { display: grid; grid-template-columns: 48px minmax(0, 1fr); gap: 14px; padding: 16px 18px; border: 1px solid var(--portal-line); border-radius: 12px; background: rgba(7, 21, 40, 0.6); }
.portal-steps li > span { font-size: 22px; font-weight: 700; color: var(--portal-accent); letter-spacing: 0.02em; }
.portal-steps h3 { margin: 0 0 6px; font-size: 16.5px; }
.portal-steps p { margin: 0; color: var(--portal-muted); font-size: 15px; }