:root {
  color-scheme: light;
  --ink: #15151a;
  --muted: #5c6070;
  --paper: #ffffff;
  --line: #d9dbe3;
  --soft: #f3f4f8;
  --dark: #111116;
  --pink: #ff007f;
  --cyan: #00d7c8;
  --violet: #7d4dff;
  --gold: #ffc857;
  --radius: 8px;
  --shadow: 0 18px 50px rgba(17, 17, 22, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(0, 215, 200, 0.07) 1px, transparent 1px),
    linear-gradient(rgba(255, 0, 127, 0.06) 1px, transparent 1px),
    var(--paper);
  background-size: 28px 28px;
  line-height: 1.7;
  letter-spacing: 0;
}

a {
  color: inherit;
}

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

.skip-link {
  position: absolute;
  left: 12px;
  top: -48px;
  z-index: 1000;
  background: var(--dark);
  color: #fff;
  padding: 10px 14px;
  border-radius: var(--radius);
}

.skip-link:focus {
  top: 12px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.nav-wrap {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 18px;
}

.brand {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  letter-spacing: 0;
}

.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  background: #fff;
  border: 2px solid var(--pink);
  box-shadow: 4px 4px 0 var(--cyan);
  border-radius: 6px;
  overflow: hidden;
}

.brand-mark img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.95rem;
}

.main-nav a {
  text-decoration: none;
  color: #2d3039;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--pink);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: currentColor;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  font-weight: 900;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 4px 4px 0 var(--cyan);
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 var(--pink);
}

.btn.primary {
  background: var(--pink);
  color: #fff;
  border-color: var(--ink);
  box-shadow: 4px 4px 0 var(--cyan);
}

.btn.small {
  min-height: 38px;
  padding: 0 14px;
  font-size: 0.9rem;
}

.hero {
  position: relative;
  min-height: clamp(620px, 88vh, 820px);
  display: grid;
  align-items: end;
  overflow: hidden;
  color: #fff;
  background: #111116;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(17, 17, 22, 0.91) 0%, rgba(17, 17, 22, 0.68) 42%, rgba(17, 17, 22, 0.28) 100%),
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.06) 0, rgba(255, 255, 255, 0.06) 1px, transparent 1px, transparent 7px);
  z-index: 1;
}

.hero-inner {
  position: relative;
  z-index: 2;
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 120px 0 86px;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--cyan);
  font-size: 0.88rem;
  font-weight: 900;
  text-transform: uppercase;
}

.kicker::before {
  content: "";
  width: 34px;
  height: 2px;
  background: var(--pink);
}

.hero h1,
.page-hero h1 {
  margin: 18px 0 16px;
  max-width: 850px;
  font-size: clamp(2.5rem, 7vw, 5.8rem);
  line-height: 0.98;
  letter-spacing: 0;
}

.subtitle {
  max-width: 720px;
  font-size: clamp(1.04rem, 2.2vw, 1.35rem);
  color: rgba(255, 255, 255, 0.88);
}

.hero-actions,
.section-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  margin-top: 28px;
}

.meta-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  width: min(1180px, calc(100% - 32px));
  margin: -34px auto 0;
  position: relative;
  z-index: 3;
  border: 1px solid var(--ink);
  box-shadow: var(--shadow);
  background: var(--ink);
}

.meta-item {
  background: #fff;
  padding: 18px;
}

.meta-item b {
  display: block;
  color: var(--pink);
  font-size: 0.78rem;
}

.section {
  padding: 82px 0;
}

.section.dark {
  background: var(--dark);
  color: #fff;
}

.section.soft {
  background: rgba(243, 244, 248, 0.92);
}

.container {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
}

.section h2,
.section h3,
.page-content h2,
.page-content h3 {
  letter-spacing: 0;
  line-height: 1.15;
}

.section h2,
.page-content h2 {
  margin: 0 0 14px;
  font-size: clamp(1.8rem, 4vw, 3.2rem);
}

.section h3,
.page-content h3 {
  margin: 0 0 10px;
  font-size: 1.22rem;
}

.lead {
  max-width: 780px;
  color: var(--muted);
  font-size: 1.05rem;
}

.dark .lead {
  color: rgba(255, 255, 255, 0.72);
}

.grid {
  display: grid;
  gap: 18px;
}

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

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

.grid.four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.grid.five {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.card,
.info-box,
.qa-item,
.step,
.link-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  padding: 22px;
}

.link-card {
  display: block;
  text-decoration: none;
}

.link-card:hover,
.link-card:focus-visible {
  border-color: var(--pink);
  box-shadow: 4px 4px 0 var(--cyan);
}

.dark .card,
.dark .info-box,
.dark .qa-item,
.dark .step,
.dark .link-card {
  background: #181820;
  border-color: #333543;
}

.card.accent {
  border: 2px solid var(--ink);
  box-shadow: 5px 5px 0 var(--pink);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 0;
}

.tag {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 10px;
  background: #fff;
  color: #343743;
  font-size: 0.86rem;
}

.dark .tag {
  background: #22232c;
  color: #fff;
  border-color: #3c3f50;
}

.media-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 18px;
  align-items: stretch;
}

.media-frame {
  border: 2px solid var(--ink);
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 6px 6px 0 var(--cyan);
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

.media-caption {
  padding: 12px 14px;
  font-size: 0.92rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.tabs {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 18px;
}

.tab-list {
  display: grid;
  gap: 8px;
  align-self: start;
}

.tab-button {
  text-align: left;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  padding: 14px;
  cursor: pointer;
  font-weight: 900;
}

.tab-button[aria-selected="true"] {
  color: #fff;
  background: var(--dark);
  border-color: var(--dark);
  box-shadow: 4px 4px 0 var(--pink);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.list-clean {
  margin: 0;
  padding-left: 20px;
}

.list-clean li + li {
  margin-top: 8px;
}

.fact-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.fact-table th,
.fact-table td {
  border-bottom: 1px solid var(--line);
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
}

.fact-table th {
  width: 190px;
  color: var(--pink);
  background: #fafafd;
}

.page-hero {
  background: var(--dark);
  color: #fff;
  padding: 94px 0 64px;
  border-bottom: 6px solid var(--pink);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.92rem;
}

.breadcrumb a {
  color: #fff;
}

.page-content {
  padding: 64px 0 82px;
}

.updated {
  display: inline-flex;
  margin-top: 10px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 0.95rem;
}

.footer {
  background: #0f0f14;
  color: #fff;
  border-top: 1px solid #262833;
}

.footer-inner {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 44px 0;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 28px;
}

.footer a {
  color: #fff;
  text-decoration-color: rgba(255, 255, 255, 0.35);
}

.friend-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
}

.friend-links a {
  color: rgba(255, 255, 255, 0.78);
}

.site-note {
  color: rgba(255, 255, 255, 0.66);
  font-size: 0.92rem;
}

.detail-modal {
  position: fixed;
  inset: 0;
  z-index: 500;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(17, 17, 22, 0.72);
  backdrop-filter: blur(8px);
}

.detail-modal__panel {
  position: relative;
  width: min(480px, 100%);
  padding: 28px;
  background: #fff;
  color: var(--ink);
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: 8px 8px 0 var(--pink);
}

.detail-modal__panel h2 {
  margin: 8px 0 10px;
  line-height: 1.15;
}

.detail-modal__close {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  cursor: pointer;
  font-size: 1.2rem;
}

.detail-modal__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 22px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 920px) {
  .nav-toggle {
    display: inline-block;
  }

  .main-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 72px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
  }

  .main-nav a,
  .main-nav button {
    width: 100%;
    justify-content: center;
    padding: 12px;
  }

  body.nav-open .main-nav {
    display: flex;
  }

  .meta-strip,
  .grid.four,
  .grid.five,
  .grid.three,
  .grid.two,
  .media-grid,
  .tabs,
  .footer-inner {
    grid-template-columns: 1fr;
  }

  .section-head {
    display: block;
  }
}

@media (max-width: 620px) {
  .hero {
    min-height: 680px;
  }

  .hero-inner {
    padding-top: 110px;
    padding-bottom: 66px;
  }

  .hero h1,
  .page-hero h1 {
    font-size: clamp(2.25rem, 12vw, 3.4rem);
  }

  .section {
    padding: 58px 0;
  }

  .page-content {
    padding: 44px 0 62px;
  }

  .fact-table th,
  .fact-table td {
    display: block;
    width: 100%;
  }

  .fact-table th {
    border-bottom: 0;
    padding-bottom: 4px;
  }

  .fact-table td {
    padding-top: 4px;
  }
}

/* Protocol-only additions: generated news pages and managed download confirmation. */
.download-confirm-backdrop {
  position: fixed;
  inset: 0;
  z-index: 600;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(17, 17, 22, 0.72);
  backdrop-filter: blur(8px);
}

.download-confirm-panel {
  width: min(460px, 100%);
  padding: 28px;
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  box-shadow: 8px 8px 0 var(--pink);
}

.download-confirm-panel h2 { margin: 0 0 10px; line-height: 1.2; }
.download-confirm-panel p { margin: 0; color: var(--muted); }
.download-confirm-actions { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
.download-confirm-cancel,
.download-confirm-continue { min-height: 42px; padding: 0 16px; border: 2px solid var(--ink); border-radius: var(--radius); font: inherit; font-weight: 900; cursor: pointer; }
.download-confirm-cancel { background: var(--paper); color: var(--ink); }
.download-confirm-continue { background: var(--pink); color: #fff; box-shadow: 4px 4px 0 var(--cyan); }

body.my-news-page { background: var(--soft); }
.my-news-shell { width: min(900px, calc(100% - 32px)); margin: 0 auto; padding: 52px 0 72px; }
.my-news-header { margin-bottom: 30px; }
.my-news-header h1 { margin: 0 0 8px; color: var(--ink); }
.my-news-header p { margin: 0; color: var(--muted); }
.my-news-back { display: inline-flex; margin-bottom: 28px; color: var(--ink); font-weight: 900; text-decoration: none; }
.my-news-back:hover,
.my-news-back:focus-visible { color: var(--pink); }
.my-news-grid { display: grid; gap: 16px; }
.my-news-card { padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); box-shadow: 0 8px 24px rgba(17, 17, 22, 0.08); }
.my-news-card h2,
.my-news-card h3 { margin: 0 0 8px; color: var(--ink); }
.my-news-card time { display: block; color: var(--muted); font-size: 0.9rem; }
.my-news-card p,
.my-news-content { color: var(--muted); }
.my-news-card a { color: var(--pink); font-weight: 900; }
.my-news-article { padding: clamp(24px, 5vw, 46px); border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); box-shadow: 0 8px 24px rgba(17, 17, 22, 0.08); }
.my-news-article h1 { margin: 0 0 10px; color: var(--ink); }
.my-news-meta { margin: 0 0 20px; color: var(--muted); }
.my-news-summary { color: var(--ink); font-weight: 700; }
.my-news-content { margin: 24px 0 0; }
.my-news-nav { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 32px; }
.my-news-nav a { color: var(--pink); font-weight: 900; }

@media (max-width: 620px) {
  .my-news-shell { width: min(100% - 24px, 900px); padding: 36px 0 56px; }
  .download-confirm-actions { justify-content: stretch; }
  .download-confirm-cancel,
  .download-confirm-continue { flex: 1 1 120px; }
}