/* ==============================================================================
   青云梯 (QingYunTi) 专属官方风格 - qingyun.mom
   ============================================================================== */
:root {
  --qyt-bg: #080E24;
  --qyt-surface: #0F1B40;
  --qyt-card: #152554;
  --qyt-card-hover: #1C3068;
  --qyt-border: rgba(56, 189, 248, 0.22);
  --qyt-border-glow: rgba(0, 102, 255, 0.6);
  --qyt-primary: #0066FF;
  --qyt-secondary: #38BDF8;
  --qyt-muted: #8EA5D9;
  --qyt-text: #FFFFFF;
  --qyt-heading: #FFFFFF;
  --qyt-grad-btn: linear-gradient(135deg, #0066FF 0%, #0284C7 60%, #0369A1 100%);
  --qyt-shadow: 0 10px 30px rgba(0, 0, 0, 0.55), 0 0 20px rgba(0, 102, 255, 0.6);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--qyt-bg);
  color: var(--qyt-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
  background-image: radial-gradient(circle at 50% 0%, rgba(0, 102, 255, 0.22) 0%, transparent 65%);
  background-attachment: fixed;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navbar */
.qyt-navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(10, 15, 30, 0.88);
  border-bottom: 1px solid var(--qyt-border);
  height: 72px;
  display: flex;
  align-items: center;
}
.qyt-navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}
.qyt-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: #FFF;
}
.qyt-brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  box-shadow: 0 0 15px var(--qyt-border-glow);
}
.qyt-brand-text {
  display: flex;
  flex-direction: column;
}
.qyt-brand-name {
  font-size: 20px;
  font-weight: 900;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #FFF 30%, var(--qyt-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.qyt-brand-sub {
  font-size: 11px;
  color: var(--qyt-secondary);
  font-weight: 600;
}

.qyt-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--qyt-border);
  border-radius: 20px;
  font-size: 12px;
  color: var(--qyt-secondary);
  font-weight: 600;
}
.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--qyt-secondary);
  box-shadow: 0 0 8px var(--qyt-secondary);
  animation: pulseAnim 2s infinite;
}
@keyframes pulseAnim {
  0% { transform: scale(0.95); opacity: 0.8; box-shadow: 0 0 0 0 var(--qyt-border-glow); }
  70% { transform: scale(1.1); opacity: 1; box-shadow: 0 0 0 8px transparent; }
  100% { transform: scale(0.95); opacity: 0.8; box-shadow: 0 0 0 0 var(--qyt-border-glow); }
}

.qyt-nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  list-style: none;
}
.qyt-nav-item {
  color: #E2E8F0;
  text-decoration: none;
  font-size: 14.5px;
  font-weight: 600;
  transition: all 0.2s;
  padding: 6px 4px;
  position: relative;
}
.qyt-nav-item:hover, .qyt-nav-item.active {
  color: #FFF;
}
.qyt-nav-item.active::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--qyt-secondary);
  border-radius: 2px;
  box-shadow: 0 0 8px var(--qyt-secondary);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 24px;
  background: var(--qyt-grad-btn);
  color: #FFF;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  border: none;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.4);
  transition: all 0.25s;
  cursor: pointer;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--qyt-shadow);
  color: #FFF;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 24px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--qyt-border);
  color: #E2E8F0;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.2s;
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--qyt-secondary);
  color: #FFF;
}

/* Hero Section */
.qyt-hero {
  padding: 55px 0 45px;
  text-align: center;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--qyt-border);
  border-radius: 30px;
  font-size: 13px;
  color: var(--qyt-secondary);
  font-weight: 700;
  margin-bottom: 20px;
}
.qyt-hero h1 {
  font-size: 38px;
  font-weight: 900;
  line-height: 1.3;
  margin-bottom: 18px;
  background: linear-gradient(135deg, #FFFFFF 20%, #E2E8F0 60%, var(--qyt-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.qyt-hero p {
  max-width: 840px;
  margin: 0 auto 30px;
  font-size: 16.5px;
  color: #CBD5E1;
  line-height: 1.8;
}
.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

/* Bento Grid */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; margin-bottom: 50px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 50px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 50px; }

.card {
  background: var(--qyt-card);
  border: 1px solid var(--qyt-border);
  border-radius: 14px;
  padding: 26px;
  transition: all 0.25s;
}
.card:hover {
  border-color: var(--qyt-border-glow);
  transform: translateY(-3px);
  background: var(--qyt-card-hover);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
}
.card-icon {
  font-size: 28px;
  margin-bottom: 16px;
}
.card h3 {
  font-size: 18px;
  font-weight: 800;
  color: #FFF;
  margin-bottom: 10px;
}
.card p {
  font-size: 14px;
  color: #CBD5E1;
  line-height: 1.7;
}

/* Section Titles */
.section-header {
  text-align: center;
  margin-bottom: 36px;
}
.section-tag {
  font-size: 13px;
  color: var(--qyt-secondary);
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 8px;
  text-transform: uppercase;
}
.section-title {
  font-size: 28px;
  font-weight: 900;
  color: #FFF;
  margin-bottom: 10px;
}
.section-subtitle {
  font-size: 14.5px;
  color: var(--qyt-muted);
  max-width: 680px;
  margin: 0 auto;
}

/* Tables */
.table-wrap {
  background: var(--qyt-surface);
  border: 1px solid var(--qyt-border);
  border-radius: 14px;
  padding: 24px;
  overflow-x: auto;
  margin-bottom: 40px;
  box-shadow: var(--qyt-shadow);
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  text-align: left;
}
th {
  padding: 14px;
  color: var(--qyt-secondary);
  border-bottom: 1px solid var(--qyt-border);
  font-weight: 700;
}
td {
  padding: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  color: #E2E8F0;
}

/* FAQ Accordion */
.faq-box {
  background: var(--qyt-surface);
  border: 1px solid var(--qyt-border);
  border-radius: 14px;
  padding: 32px;
  margin-bottom: 50px;
}
.faq-item {
  border-bottom: 1px solid var(--qyt-border);
  padding: 18px 0;
}
.faq-item:last-child { border-bottom: none; }
.faq-q {
  font-size: 16.5px;
  font-weight: 800;
  color: #FFF;
  margin-bottom: 8px;
}
.faq-a {
  font-size: 14px;
  color: #CBD5E1;
  line-height: 1.8;
}

/* Footer */
.qyt-footer {
  background: rgba(5, 8, 18, 0.95);
  border-top: 1px solid var(--qyt-border);
  padding: 45px 0 25px;
  margin-top: 50px;
  font-size: 13.5px;
}
.qyt-footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  padding-bottom: 25px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 25px;
}
.qyt-footer-nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.qyt-footer-nav a {
  color: #E2E8F0;
  text-decoration: none;
  font-weight: 600;
}
.qyt-footer-nav a:hover {
  color: var(--qyt-secondary);
}
.qyt-footer-copy {
  text-align: center;
  color: var(--qyt-muted);
  font-size: 13px;
  line-height: 1.8;
}

/* Ecosystem Links Bar */
.site-ecosystem-bar {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--qyt-border);
  border-radius: 10px;
  padding: 16px 22px;
  margin-bottom: 25px;
}
.ecosystem-title {
  font-size: 12px;
  font-weight: 800;
  color: var(--qyt-secondary);
  margin-bottom: 10px;
  text-transform: uppercase;
}
.ecosystem-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.footer-link {
  font-size: 12px;
  color: #E2E8F0;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--qyt-border);
  padding: 5px 12px;
  border-radius: 6px;
  text-decoration: none;
  transition: all 0.2s;
}
.footer-link:hover, .footer-link.current {
  background: var(--qyt-primary);
  color: #FFF;
  border-color: var(--qyt-primary);
}

/* Quick Jump Dock */
.quick-jump-dock {
  position: fixed;
  right: 24px;
  bottom: 28px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s;
}
.quick-jump-dock.visible {
  opacity: 1;
  pointer-events: auto;
}
.jump-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.5);
}
.jump-top {
  background: var(--qyt-surface);
  border: 1px solid var(--qyt-border);
  color: #FFF;
}
.jump-official {
  background: var(--qyt-grad-btn);
  color: #FFF;
}

/* Responsive */
@media (max-width: 992px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
  .qyt-badge { display: none; }
}
@media (max-width: 768px) {
  .qyt-nav-links { display: none; }
  .qyt-hero h1 { font-size: 26px; }
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .qyt-footer-top { flex-direction: column; text-align: center; }
}