:root {
  --xbz-teal-900: #042f2e;
  --xbz-teal-700: #0f766e;
  --xbz-teal-500: #14b8a6;
  --xbz-teal-300: #5eead4;
  --xbz-amber-500: #f59e0b;
  --xbz-amber-300: #fcd34d;
  --xbz-slate-950: #020617;
  --xbz-slate-800: #1e293b;
  --xbz-slate-600: #475569;
  --xbz-slate-400: #94a3b8;
  --xbz-slate-100: #f1f5f9;
  --xbz-glass: rgba(15, 23, 42, 0.72);
  --xbz-radius-lg: 20px;
  --xbz-radius-md: 14px;
  --xbz-shadow: 0 18px 48px rgba(2, 6, 23, 0.28);
  --xbz-nav-h: 64px;
  --xbz-dock-h: 88px;
  --xbz-font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--xbz-font);
  background: var(--xbz-slate-950);
  color: var(--xbz-slate-100);
  line-height: 1.75;
  overflow-x: hidden;
}

a { color: var(--xbz-teal-300); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--xbz-amber-300); }

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

.xbz-wrap { width: min(1120px, 92vw); margin: 0 auto; }

/* Header */
.xbz-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--xbz-nav-h);
  background: var(--xbz-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.12);
  transition: box-shadow 0.3s;
}

.xbz-header.xbz-scrolled { box-shadow: var(--xbz-shadow); }

.xbz-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.xbz-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  color: #fff;
}

.xbz-brand img { width: 38px; height: 38px; border-radius: 10px; }

.xbz-nav-desktop { display: none; gap: 28px; list-style: none; }
.xbz-nav-desktop a { color: var(--xbz-slate-100); font-size: 0.95rem; }
.xbz-nav-desktop a:hover, .xbz-nav-desktop a.xbz-active { color: var(--xbz-teal-300); }

.xbz-burger {
  width: 44px;
  height: 44px;
  border: none;
  background: rgba(20, 184, 166, 0.12);
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.xbz-burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--xbz-teal-300);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
}

.xbz-burger.xbz-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.xbz-burger.xbz-open span:nth-child(2) { opacity: 0; }
.xbz-burger.xbz-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.xbz-nav-mobile {
  position: fixed;
  top: var(--xbz-nav-h);
  left: 0;
  right: 0;
  background: rgba(2, 6, 23, 0.96);
  backdrop-filter: blur(20px);
  padding: 20px;
  transform: translateY(-120%);
  opacity: 0;
  transition: transform 0.35s, opacity 0.35s;
  z-index: 999;
  border-bottom: 1px solid rgba(148, 163, 184, 0.1);
}

.xbz-nav-mobile.xbz-show { transform: translateY(0); opacity: 1; }

.xbz-nav-mobile ul { list-style: none; }
.xbz-nav-mobile li { border-bottom: 1px solid rgba(148, 163, 184, 0.08); }
.xbz-nav-mobile a {
  display: block;
  padding: 16px 8px;
  color: var(--xbz-slate-100);
  font-size: 1.05rem;
}

/* Fixed download dock */
.xbz-dock {
  position: fixed;
  top: var(--xbz-nav-h);
  left: 0;
  right: 0;
  z-index: 998;
  background: rgba(4, 47, 46, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(20, 184, 166, 0.2);
  padding: 8px 12px;
  transform: translateY(-110%);
  transition: transform 0.35s ease;
}

.xbz-dock.xbz-dock-visible { transform: translateY(0); }

.xbz-dock-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  max-width: 1120px;
  margin: 0 auto;
}

.xbz-dock-item {
  width: calc(20% - 7px);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-decoration: none;
}

.xbz-dock-item img {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  object-fit: cover;
  box-shadow: 0 4px 14px rgba(0,0,0,0.25);
  transition: transform 0.18s;
}

.xbz-dock-item:hover img { transform: scale(1.06); }

.xbz-dock-item span {
  font-size: 10px;
  color: var(--xbz-slate-400);
  margin-top: 4px;
  max-width: 64px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Promo ads top */
.xbz-promo-zone {
  padding-top: calc(var(--xbz-nav-h) + 12px);
  background: linear-gradient(180deg, rgba(13,148,136,0.08) 0%, transparent 100%);
}

.xbz-promo-zone #ads {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  flex-wrap: wrap;
  background: transparent;
  margin: 10px auto;
  max-width: 1120px;
}

.xbz-promo-zone #ads > div {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 70px;
}

.xbz-promo-zone #ads img {
  width: 65px;
  height: 65px;
  object-fit: cover;
  border-radius: 18px;
  box-shadow: 0 6px 18px rgba(24,24,24,0.12);
}

.xbz-promo-zone #ads .caption {
  height: 15px;
  font-size: 11px;
  color: #666;
  text-align: center;
  max-width: 100px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Hero */
.xbz-hero {
  position: relative;
  padding: 48px 0 64px;
  overflow: hidden;
  min-height: 320px;
}

.xbz-hero-bg {
  position: absolute;
  inset: 0;
  opacity: 0.35;
  object-fit: cover;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.xbz-hero-content { position: relative; z-index: 2; }

.xbz-hero-tag {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(20, 184, 166, 0.15);
  border: 1px solid rgba(20, 184, 166, 0.35);
  color: var(--xbz-teal-300);
  font-size: 0.85rem;
  margin-bottom: 20px;
}

.xbz-hero h1 {
  font-size: clamp(1.75rem, 5vw, 2.6rem);
  line-height: 1.3;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #fff 0%, var(--xbz-teal-300) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.xbz-hero-lead {
  font-size: 1.05rem;
  color: var(--xbz-slate-400);
  max-width: 640px;
  margin-bottom: 28px;
}

.xbz-hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }

.xbz-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: var(--xbz-radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.xbz-btn:active { transform: scale(0.97); }

.xbz-btn-primary {
  background: linear-gradient(135deg, var(--xbz-teal-500), var(--xbz-teal-700));
  color: #fff;
  box-shadow: 0 8px 24px rgba(20, 184, 166, 0.35);
}

.xbz-btn-outline {
  background: transparent;
  color: var(--xbz-teal-300);
  border: 1px solid rgba(20, 184, 166, 0.45);
}

/* Sections */
.xbz-main { padding-bottom: 80px; }

.xbz-section { padding: 56px 0; }

.xbz-section-alt {
  background: linear-gradient(180deg, rgba(30,41,59,0.35) 0%, transparent 100%);
}

.xbz-section-head { margin-bottom: 36px; }

.xbz-section-head h2 {
  font-size: clamp(1.4rem, 4vw, 1.9rem);
  margin-bottom: 12px;
  color: #fff;
}

.xbz-section-head p { color: var(--xbz-slate-400); max-width: 680px; }

.xbz-prose h3 {
  font-size: 1.25rem;
  color: var(--xbz-teal-300);
  margin: 28px 0 12px;
}

.xbz-prose p {
  margin-bottom: 16px;
  color: var(--xbz-slate-400);
  text-align: justify;
}

.xbz-prose ul, .xbz-prose ol {
  margin: 12px 0 20px 20px;
  color: var(--xbz-slate-400);
}

.xbz-prose li { margin-bottom: 8px; }

/* Bento grid */
.xbz-bento {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.xbz-bento-card {
  background: rgba(30, 41, 59, 0.55);
  border: 1px solid rgba(148, 163, 184, 0.1);
  border-radius: var(--xbz-radius-lg);
  padding: 24px;
  backdrop-filter: blur(8px);
  transition: border-color 0.25s, transform 0.25s;
}

.xbz-bento-card:hover {
  border-color: rgba(20, 184, 166, 0.35);
  transform: translateY(-3px);
}

.xbz-bento-card h3 {
  font-size: 1.1rem;
  color: #fff;
  margin-bottom: 10px;
}

.xbz-bento-card p { color: var(--xbz-slate-400); font-size: 0.92rem; }

.xbz-bento-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--xbz-teal-700), var(--xbz-amber-500));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 14px;
}

/* Split layout */
.xbz-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}

.xbz-split-img {
  border-radius: var(--xbz-radius-lg);
  box-shadow: var(--xbz-shadow);
  border: 1px solid rgba(148, 163, 184, 0.12);
}

/* Stats row */
.xbz-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.xbz-stat {
  text-align: center;
  padding: 24px 16px;
  background: rgba(4, 47, 46, 0.5);
  border-radius: var(--xbz-radius-md);
  border: 1px solid rgba(20, 184, 166, 0.15);
}

.xbz-stat-num {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--xbz-amber-300);
}

.xbz-stat-label { font-size: 0.85rem; color: var(--xbz-slate-400); margin-top: 4px; }

/* Timeline */
.xbz-timeline { position: relative; padding-left: 28px; }

.xbz-timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: linear-gradient(180deg, var(--xbz-teal-500), var(--xbz-amber-500));
}

.xbz-timeline-item {
  position: relative;
  margin-bottom: 28px;
  padding: 20px;
  background: rgba(30, 41, 59, 0.4);
  border-radius: var(--xbz-radius-md);
}

.xbz-timeline-item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 24px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--xbz-teal-500);
  box-shadow: 0 0 12px var(--xbz-teal-500);
}

.xbz-timeline-item h3 { color: #fff; font-size: 1.05rem; margin-bottom: 8px; }
.xbz-timeline-item p { color: var(--xbz-slate-400); font-size: 0.92rem; }

/* FAQ */
.xbz-faq-item {
  border: 1px solid rgba(148, 163, 184, 0.12);
  border-radius: var(--xbz-radius-md);
  margin-bottom: 12px;
  overflow: hidden;
}

.xbz-faq-q {
  width: 100%;
  text-align: left;
  padding: 18px 20px;
  background: rgba(30, 41, 59, 0.5);
  border: none;
  color: #fff;
  font-size: 0.95rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.xbz-faq-a {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s, padding 0.35s;
  color: var(--xbz-slate-400);
  font-size: 0.92rem;
}

.xbz-faq-item.xbz-open .xbz-faq-a {
  max-height: 400px;
  padding: 0 20px 18px;
}

/* Breadcrumb */
.xbz-crumb {
  padding: calc(var(--xbz-nav-h) + 20px) 0 12px;
  font-size: 0.85rem;
  color: var(--xbz-slate-400);
}

.xbz-crumb a { color: var(--xbz-teal-300); }
.xbz-crumb span { margin: 0 8px; opacity: 0.5; }

/* Legal page */
.xbz-legal { padding: 24px 0 80px; }
.xbz-legal h1 { font-size: 1.8rem; margin-bottom: 8px; color: #fff; }
.xbz-legal-meta { color: var(--xbz-slate-400); font-size: 0.85rem; margin-bottom: 32px; }
.xbz-legal h2 { font-size: 1.25rem; color: var(--xbz-teal-300); margin: 32px 0 12px; }
.xbz-legal p, .xbz-legal li { color: var(--xbz-slate-400); margin-bottom: 12px; }
.xbz-legal ul, .xbz-legal ol { margin-left: 20px; margin-bottom: 16px; }

/* Error pages */
.xbz-error {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--xbz-nav-h) + 40px) 20px 60px;
}

.xbz-error-code {
  font-size: clamp(4rem, 15vw, 7rem);
  font-weight: 800;
  background: linear-gradient(135deg, var(--xbz-teal-500), var(--xbz-amber-500));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.xbz-error h1 { font-size: 1.5rem; margin: 16px 0 12px; }
.xbz-error p { color: var(--xbz-slate-400); max-width: 420px; margin-bottom: 28px; }

/* Footer */
.xbz-footer {
  background: rgba(2, 6, 23, 0.95);
  border-top: 1px solid rgba(148, 163, 184, 0.1);
  padding: 40px 0 28px;
}

.xbz-footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  list-style: none;
  margin-bottom: 24px;
}

.xbz-footer-nav a { color: var(--xbz-slate-400); font-size: 0.9rem; }
.xbz-footer-nav a:hover { color: var(--xbz-teal-300); }

.xbz-footer-copy {
  text-align: center;
  font-size: 0.8rem;
  color: var(--xbz-slate-600);
}

body.xbz-dock-active .xbz-promo-zone {
  padding-top: calc(var(--xbz-nav-h) + var(--xbz-dock-h) + 12px);
}

body.xbz-dock-active .xbz-crumb {
  padding-top: calc(var(--xbz-nav-h) + var(--xbz-dock-h) + 20px);
}

body.xbz-dock-active .xbz-error {
  padding-top: calc(var(--xbz-nav-h) + var(--xbz-dock-h) + 40px);
}

@media (min-width: 640px) {
  .xbz-bento { grid-template-columns: repeat(2, 1fr); }
  .xbz-stats { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 768px) {
  .xbz-burger, .xbz-nav-mobile { display: none; }
  .xbz-nav-desktop { display: flex; }
  .xbz-split { grid-template-columns: 1fr 1fr; }
  .xbz-split.xbz-reverse { direction: rtl; }
  .xbz-split.xbz-reverse > * { direction: ltr; }
  .xbz-dock-item { width: calc(12.5% - 7px); }
}

@media (min-width: 1024px) {
  .xbz-bento { grid-template-columns: repeat(3, 1fr); }
  .xbz-bento .xbz-span-2 { grid-column: span 2; }
}

@media (max-width: 767px) {
  .xbz-dock-item { width: calc(20% - 7px); }
}

@keyframes xbz-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.xbz-float { animation: xbz-float 4s ease-in-out infinite; }

/* Image gallery */
.xbz-gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.xbz-gallery-compact { max-width: 900px; margin: 0 auto; }

.xbz-gallery-item {
  margin: 0;
  background: rgba(30, 41, 59, 0.45);
  border-radius: var(--xbz-radius-md);
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.1);
}

.xbz-gallery-item img {
  width: 100%;
  aspect-ratio: 2/3;
  object-fit: cover;
}

.xbz-gallery-item figcaption {
  padding: 10px 12px;
  font-size: 0.85rem;
  color: var(--xbz-slate-400);
  text-align: center;
}

@media (min-width: 768px) {
  .xbz-gallery { grid-template-columns: repeat(3, 1fr); }
}