:root {
  --bg: #050913;
  --bg-2: #091326;
  --panel: rgba(12, 24, 48, .82);
  --panel-2: rgba(22, 18, 54, .72);
  --line: rgba(95, 191, 255, .22);
  --text: #eef6ff;
  --muted: #a7b8d4;
  --cyan: #37e8ff;
  --blue: #4b8dff;
  --violet: #9a6bff;
  --green: #7dffbf;
  --amber: #ffd166;
  --danger: #ff5f9e;
  --shadow: 0 24px 70px rgba(0, 0, 0, .36);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, sans-serif;
  color: var(--text);
  background:
    linear-gradient(90deg, rgba(55,232,255,.05) 1px, transparent 1px),
    linear-gradient(0deg, rgba(154,107,255,.05) 1px, transparent 1px),
    radial-gradient(circle at 20% 0%, rgba(55,232,255,.12), transparent 32%),
    linear-gradient(145deg, #030711 0%, #08152b 48%, #120a25 100%);
  background-size: 44px 44px, 44px 44px, auto, auto;
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(120deg, transparent 0 28%, rgba(75,141,255,.12) 29%, transparent 31% 64%, rgba(125,255,191,.08) 65%, transparent 67%),
    repeating-linear-gradient(105deg, rgba(255,255,255,.02) 0 1px, transparent 1px 22px);
  mix-blend-mode: screen;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
p { color: var(--muted); line-height: 1.78; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: rgba(3, 7, 17, .78);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  height: 72px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand img, .footer-mark img, .transfer-card img {
  object-fit: contain;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.nav-link {
  padding: 10px 12px;
  border-radius: 8px;
  color: #c9d8ee;
  font-size: 14px;
}

.nav-link:hover, .nav-link.active {
  color: #ffffff;
  background: rgba(55, 232, 255, .1);
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  margin-left: auto;
  border: 1px solid var(--line);
  background: rgba(10, 24, 48, .72);
  border-radius: 8px;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--cyan);
  margin: 5px auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,.16);
  color: #f8fbff;
  font-weight: 700;
  letter-spacing: 0;
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}

.btn:hover { transform: translateY(-2px); }
.btn.primary {
  background: linear-gradient(135deg, var(--blue), var(--violet) 58%, var(--cyan));
  box-shadow: 0 0 28px rgba(55, 232, 255, .24);
}
.btn.ghost { background: rgba(10, 28, 58, .58); }
.nav-download { min-height: 40px; padding: 0 16px; font-size: 14px; }

.hero {
  position: relative;
  min-height: 560px;
  overflow: hidden;
  display: flex;
  align-items: center;
}

.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(3,7,17,.92) 0%, rgba(5,12,28,.72) 42%, rgba(5,9,19,.26) 100%),
    linear-gradient(0deg, rgba(3,7,17,.96), transparent 38%);
}

.hero-content {
  position: relative;
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 84px 0 70px;
}

.hero-content h1, .mini-copy h1, .article-detail h1 {
  max-width: 760px;
  margin: 10px 0 18px;
  font-size: clamp(34px, 6vw, 66px);
  line-height: 1.06;
  letter-spacing: 0;
}

.hero-content p {
  max-width: 680px;
  font-size: 17px;
}

.eyebrow {
  margin: 0;
  color: var(--green);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.section { padding: 46px 0; position: relative; }
.section-inner { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.section-heading { max-width: 780px; margin-bottom: 24px; }
.section-heading h2, .split-note h2, .media-card h2, .content-panel h2, .side-note h3, .step-card h2, .metric-layout h2 {
  margin: 8px 0 10px;
  letter-spacing: 0;
}

.split-note {
  display: grid;
  grid-template-columns: .75fr 1.25fr auto;
  gap: 28px;
  align-items: center;
  padding: 24px;
  border: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(8,24,52,.72), rgba(28,18,70,.48));
  border-radius: 8px;
}

.download-overview, .feature-mosaic, .article-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.download-panel, .info-card, .media-card, .content-panel, .side-note, .step-card, .metric-layout article, .news-card, .faq-item {
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(12, 24, 48, .86), rgba(20, 16, 48, .72));
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.download-panel { padding: 26px; }
.download-panel.accent { border-color: rgba(125,255,191,.26); }
.text-link, .download-panel a:not(.btn), .media-card a, .info-card a, .side-note a, .related-links a {
  color: var(--cyan);
  font-weight: 700;
}

.media-card {
  overflow: hidden;
}

.media-card img, .news-image img, .detail-cover img, .mini-visual img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: center;
}

.media-card div { padding: 22px; }

.info-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.info-card { padding: 22px; min-height: 210px; }
.info-card h3 { margin: 0 0 12px; }

.row-heading {
  max-width: none;
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 18px;
}

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

.news-card { overflow: hidden; }
.news-body { padding: 18px; }
.news-body h3 { margin: 6px 0 10px; font-size: 19px; line-height: 1.4; }
.tag {
  display: inline-flex;
  margin: 0;
  color: var(--amber);
  font-size: 12px;
  font-weight: 800;
}

.two-col {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 24px;
  align-items: start;
}

.faq-list details, .faq-page details {
  padding: 16px 18px;
  margin-bottom: 12px;
}

summary {
  cursor: pointer;
  font-weight: 800;
  color: #ffffff;
}

.mini-hero { padding: 54px 0 36px; }
.mini-hero-grid {
  display: grid;
  grid-template-columns: .82fr 1.18fr;
  gap: 28px;
  align-items: center;
}
.mini-copy p { max-width: 640px; }
.mini-visual {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.article-layout { grid-template-columns: minmax(0, 1fr) 320px; align-items: start; }
.content-panel { padding: 28px; }
.content-panel.narrow { max-width: 860px; }
.content-panel p { margin-bottom: 18px; }
.side-note { padding: 22px; position: sticky; top: 92px; }
.side-note a { display: block; margin-top: 12px; }
.content-cta { margin-top: 22px; }

.check-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 20px;
}
.check-list span {
  padding: 12px 14px;
  border: 1px solid rgba(125,255,191,.24);
  border-radius: 8px;
  color: #dfffee;
  background: rgba(125,255,191,.06);
}

.process-grid, .metric-layout {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}
.step-card, .metric-layout article { padding: 22px; }
.step-card span, .metric-layout span {
  color: var(--cyan);
  font-weight: 900;
}
.metric-layout { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.link-strip { padding-top: 10px; }
.link-strip .section-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  padding: 18px;
  border-top: 1px solid var(--line);
}
.link-strip span { color: var(--muted); }
.link-strip a { color: var(--cyan); font-weight: 700; }

.faq-page { max-width: 900px; }

.article-detail { padding: 54px 0; }
.detail-cover {
  margin: 24px 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.detail-content {
  max-width: 880px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(9, 20, 42, .76);
}
.detail-content h2 { margin-top: 0; }
.article-nav {
  max-width: 880px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 18px;
}
.article-nav a, .related-links {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(10, 24, 48, .62);
}
.related-links {
  max-width: 880px;
  margin-top: 12px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.related-links span { color: var(--muted); }

.site-footer {
  margin-top: 34px;
  border-top: 1px solid var(--line);
  background: rgba(3,7,17,.82);
}
.footer-inner {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0;
  text-align: center;
}
.footer-mark { display: flex; justify-content: center; margin-bottom: 12px; }
.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 12px;
}
.footer-links a { color: #b8c9e4; }
.copyright { margin: 0; color: #d7e4f7; text-align: center; }

.transfer-page {
  min-height: 100vh;
  display: grid;
  grid-template-rows: 1fr auto;
  background:
    linear-gradient(90deg, rgba(55,232,255,.05) 1px, transparent 1px),
    linear-gradient(0deg, rgba(154,107,255,.05) 1px, transparent 1px),
    linear-gradient(145deg, #030711, #08152b 52%, #130923);
  background-size: 42px 42px, 42px 42px, auto;
}
.transfer-wrap {
  display: grid;
  place-items: center;
  padding: 32px;
}
.transfer-card {
  width: min(460px, 100%);
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(8, 18, 38, .86);
  box-shadow: var(--shadow);
  text-align: center;
}
.transfer-card img { margin: 0 auto 18px; }
.transfer-card h1 { margin: 8px 0 12px; }
.progress-track {
  height: 8px;
  overflow: hidden;
  border-radius: 8px;
  background: rgba(255,255,255,.12);
  margin: 22px 0;
}
.progress-track span {
  display: block;
  width: 0%;
  height: 100%;
  border-radius: 8px;
  background: linear-gradient(90deg, var(--cyan), var(--violet), var(--green));
}
.transfer-button { width: 100%; }
.transfer-small { font-size: 13px; margin-bottom: 0; }
.transfer-footer { padding: 18px; text-align: center; color: #d7e4f7; }

@media (max-width: 980px) {
  .header-inner { height: auto; min-height: 68px; flex-wrap: wrap; padding: 10px 0; }
  .menu-toggle { display: block; }
  .site-nav {
    display: none;
    width: 100%;
    order: 5;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin: 0;
  }
  .site-nav.open { display: grid; }
  .nav-download { margin-left: 0; }
  .hero { min-height: 520px; }
  .hero-content h1, .mini-copy h1, .article-detail h1 { font-size: clamp(32px, 9vw, 48px); }
  .download-overview, .feature-mosaic, .article-layout, .mini-hero-grid, .two-col, .split-note {
    grid-template-columns: 1fr;
  }
  .info-grid, .process-grid, .metric-layout, .news-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .side-note { position: static; }
}

@media (max-width: 640px) {
  .section { padding: 34px 0; }
  .header-inner, .section-inner, .hero-content, .footer-inner { width: min(100% - 24px, 1180px); }
  .brand img { width: 132px; height: auto; }
  .nav-download { width: 100%; order: 6; }
  .site-nav { grid-template-columns: 1fr; }
  .hero {
    display: block;
    min-height: 0;
  }
  .hero-bg {
    position: relative;
    aspect-ratio: 16 / 9;
    height: auto;
  }
  .hero-overlay { display: none; }
  .hero-content { padding: 26px 0 34px; }
  .hero-actions, .row-heading, .article-nav, .related-links {
    display: grid;
    grid-template-columns: 1fr;
  }
  .btn { width: 100%; }
  .info-grid, .process-grid, .metric-layout, .news-grid, .check-list {
    grid-template-columns: 1fr;
  }
  .content-panel, .download-panel, .step-card, .metric-layout article, .transfer-card {
    padding: 20px;
  }
  .footer-links { gap: 10px 14px; }
}