/* xlapp.lol 杏吧 — 全站样式 */
:root {
  --xb-bg: #080e1a;
  --xb-surface: #111b2e;
  --xb-card: rgba(22, 36, 58, 0.72);
  --xb-glass: rgba(16, 28, 48, 0.55);
  --xb-accent: #2dd4bf;
  --xb-accent2: #818cf8;
  --xb-warm: #f472b6;
  --xb-text: #e8edf5;
  --xb-muted: #8b9cb8;
  --xb-border: rgba(129, 140, 248, 0.18);
  --xb-radius: 18px;
  --xb-header-h: 64px;
  --xb-head-real: 64px;
  --xb-font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --xb-display: "STKaiti", "KaiTi", serif;
}

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

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

body {
  font-family: var(--xb-font);
  background: var(--xb-bg);
  color: var(--xb-text);
  line-height: 1.75;
  overflow-x: hidden;
  min-height: 100vh;
}

body.menu-open { overflow: hidden; }

a { color: var(--xb-accent); text-decoration: none; transition: color .2s; }
a:hover { color: var(--xb-warm); }

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

/* 背景光效 */
.xb-aurora {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(ellipse 60% 40% at 20% 10%, rgba(45,212,191,.12), transparent),
    radial-gradient(ellipse 50% 35% at 80% 60%, rgba(129,140,248,.1), transparent),
    var(--xb-bg);
}

/* 顶栏外壳 */
.xb-head-bar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(8, 14, 26, 0.98);
  border-bottom: 1px solid var(--xb-border);
}

/* 顶栏 */
.xb-header {
  background: transparent;
  border-bottom: none;
  padding-top: env(safe-area-inset-top, 0px);
}

.xb-header-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.25rem;
  min-height: var(--xb-header-h);
}

.xb-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--xb-display);
  font-size: 1.15rem;
  color: var(--xb-text);
  font-weight: 600;
}
.xb-brand img { width: 36px; height: 36px; border-radius: 10px; }

.xb-nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  position: relative;
  z-index: 3001;
}
.xb-nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--xb-text);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.xb-nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.xb-nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.xb-nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端全屏菜单 */
.xb-nav-panel {
  position: fixed;
  z-index: 3000;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  height: 100dvh;
  padding-top: var(--xb-head-real, 64px);
  box-sizing: border-box;
  background: rgba(8, 14, 26, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  transform: translateX(100%);
  transition: transform 0.32s ease;
  pointer-events: none;
  overflow-y: auto;
}
.xb-nav-panel.is-open {
  transform: translateX(0);
  pointer-events: auto;
}
.xb-nav-panel a {
  font-size: 1.15rem;
  color: var(--xb-text);
  padding: 0.55rem 1.6rem;
  border-radius: 999px;
  border: 1px solid transparent;
}
.xb-nav-panel a:hover,
.xb-nav-panel a.xb-active {
  border-color: var(--xb-accent);
  color: var(--xb-accent);
}

@media (min-width: 900px) {
  .xb-nav-toggle { display: none; }
  .xb-head-bar {
    display: flex;
    align-items: center;
    max-width: 1100px;
    margin: 0 auto;
    padding-right: 1.25rem;
  }
  .xb-header {
    flex: 1 1 auto;
    padding-top: 0;
  }
  .xb-header-inner {
    padding-right: 0;
  }
  .xb-nav-panel {
    position: static;
    width: auto;
    height: auto;
    padding: 0;
    flex-direction: row;
    transform: none;
    pointer-events: auto;
    background: none;
    gap: 0.2rem;
    overflow: visible;
    flex-shrink: 0;
  }
  .xb-nav-panel a { font-size: 0.9rem; padding: 0.35rem 0.8rem; }
}

/* 漂浮广告条：滚动后固定于导航栏正下方 */
.xb-sticky-dl {
  position: fixed;
  z-index: 950;
  left: 0;
  right: 0;
  top: var(--xb-head-real, 64px);
  background: rgba(10, 18, 32, 0.98);
  border-bottom: 1px solid var(--xb-border);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
  padding: 8px 10px 10px;
  transform: translateY(-110%);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: transform 0.28s ease, opacity 0.28s ease, visibility 0.28s;
}
.xb-sticky-dl.is-show {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}
body.menu-open .xb-sticky-dl {
  transform: translateY(-110%);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

/* 广告格（与 xl.html 一致） */
.xb-sticky-inner,
#xb-promo-ads {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: flex-start;
  gap: 8px 4px;
  max-width: 1100px;
  margin: 0 auto;
}
.xb-ad-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 70px;
  flex-shrink: 0;
}
.xb-ad-cell a {
  display: block;
  line-height: 0;
  border-radius: 16px;
}
.xb-ad-cell img {
  width: 65px;
  height: 65px;
  object-fit: cover;
  border-radius: 16px;
  display: block;
  background: #fff;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.22);
}
.xb-ad-label {
  display: block;
  width: 70px;
  margin-top: 3px;
  font-size: 11px;
  line-height: 14px;
  height: 14px;
  color: var(--xb-muted);
  text-align: center;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

@media (max-width: 899px) {
  .xb-sticky-inner .xb-ad-cell,
  #xb-promo-ads .xb-ad-cell {
    width: calc(20% - 4px);
    max-width: 72px;
  }
  .xb-sticky-inner .xb-ad-cell img,
  #xb-promo-ads .xb-ad-cell img {
    width: 58px;
    height: 58px;
  }
  .xb-sticky-inner .xb-ad-label,
  #xb-promo-ads .xb-ad-label {
    width: 100%;
    max-width: 68px;
  }
}

@media (min-width: 900px) {
  .xb-sticky-inner .xb-ad-cell {
    width: calc(12.5% - 6px);
    max-width: 82px;
  }
}

/* 顶部推广区 */
.xb-promo-zone {
  display: none;
  max-width: 1100px;
  margin: 0 auto;
  padding: 10px 12px 8px;
}
.xb-promo-zone.is-loaded {
  display: block;
}

/* Hero */
.xb-hero {
  position: relative; overflow: hidden;
  padding: 2.5rem 1.25rem 3rem;
  max-width: 1100px; margin: 0 auto;
}
.xb-hero-grid {
  display: grid; gap: 2rem; align-items: center;
}
@media (min-width: 768px) {
  .xb-hero-grid { grid-template-columns: 1fr 1fr; }
}
.xb-hero h1 {
  font-family: var(--xb-display);
  font-size: clamp(1.6rem, 5vw, 2.4rem);
  line-height: 1.35;
  background: linear-gradient(135deg, var(--xb-accent), var(--xb-accent2));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
}
.xb-hero-lead {
  color: var(--xb-muted); font-size: 1.05rem; margin-bottom: 1.5rem;
}
.xb-hero-visual {
  border-radius: var(--xb-radius);
  box-shadow: 0 20px 60px rgba(45,212,191,.15);
  border: 1px solid var(--xb-border);
}

/* 主内容区 */
.xb-main { max-width: 1100px; margin: 0 auto; padding: 0 1.25rem 4rem; }

/* 面包屑 */
.xb-crumb {
  padding: 1rem 0; font-size: .85rem; color: var(--xb-muted);
}
.xb-crumb a { color: var(--xb-muted); }
.xb-crumb a:hover { color: var(--xb-accent); }
.xb-crumb span { margin: 0 .4rem; }

/* 模块 */
.xb-block { margin-bottom: 3rem; }

.xb-block h2 {
  font-family: var(--xb-display);
  font-size: 1.5rem; margin-bottom: 1rem;
  padding-left: .75rem;
  border-left: 3px solid var(--xb-accent);
}
.xb-block h3 {
  font-size: 1.15rem; margin: 1.25rem 0 .75rem;
  color: var(--xb-accent2);
}

.xb-prose p { margin-bottom: 1rem; color: #c5d0e0; text-align: justify; }
.xb-prose ul, .xb-prose ol { margin: .75rem 0 1rem 1.5rem; color: #c5d0e0; }
.xb-prose li { margin-bottom: .4rem; }

/* 图文交替 */
.xb-split {
  display: grid; gap: 1.5rem; align-items: center;
  margin-bottom: 2.5rem;
}
@media (min-width: 700px) {
  .xb-split { grid-template-columns: 1fr 1fr; }
  .xb-split.xb-reverse .xb-split-img { order: 2; }
  .xb-split.xb-reverse .xb-split-text { order: 1; }
}
.xb-split-img img {
  border-radius: var(--xb-radius);
  border: 1px solid var(--xb-border);
  box-shadow: 0 12px 40px rgba(0,0,0,.3);
}

/* 卡片网格 */
.xb-cards {
  display: grid; gap: 1.25rem;
  grid-template-columns: 1fr;
}
@media (min-width: 600px) { .xb-cards { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px) { .xb-cards.xb-three { grid-template-columns: repeat(3, 1fr); } }

.xb-card {
  background: var(--xb-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--xb-border);
  border-radius: var(--xb-radius);
  padding: 1.5rem;
  transition: transform .25s, box-shadow .25s;
}
.xb-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(45,212,191,.1);
}
.xb-card-icon {
  width: 48px; height: 48px; border-radius: 12px;
  background: linear-gradient(135deg, var(--xb-accent), var(--xb-accent2));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; margin-bottom: .75rem;
}

/* CTA */
.xb-cta-band {
  text-align: center; padding: 2.5rem 1.5rem;
  background: linear-gradient(135deg, rgba(45,212,191,.08), rgba(129,140,248,.08));
  border: 1px solid var(--xb-border);
  border-radius: var(--xb-radius);
  margin: 2rem 0;
}
.xb-btn-dl {
  display: inline-block; margin-top: 1rem;
  padding: .85rem 2.2rem;
  background: linear-gradient(135deg, var(--xb-accent), #14b8a6);
  color: #042f2e; font-weight: 700; font-size: 1rem;
  border-radius: 999px; border: none; cursor: pointer;
  transition: transform .2s, box-shadow .2s;
  box-shadow: 0 6px 24px rgba(45,212,191,.3);
}
.xb-btn-dl:hover {
  transform: scale(1.04);
  box-shadow: 0 8px 32px rgba(45,212,191,.45);
  color: #042f2e;
}

/* 页脚 */
.xb-footer {
  border-top: 1px solid var(--xb-border);
  padding: 2rem 1.25rem;
  text-align: center;
  background: var(--xb-surface);
}
.xb-footer-nav {
  display: flex; flex-wrap: wrap; justify-content: center; gap: .5rem 1rem;
  margin-bottom: 1rem;
}
.xb-footer-nav a { color: var(--xb-muted); font-size: .88rem; }
.xb-footer-nav a:hover { color: var(--xb-accent); }
.xb-footer-copy { font-size: .78rem; color: #5a6a82; }

/* 法律页 */
.xb-legal h1 {
  font-family: var(--xb-display);
  font-size: 1.8rem; margin-bottom: .5rem;
}
.xb-legal-meta { color: var(--xb-muted); font-size: .85rem; margin-bottom: 2rem; }

/* 错误页 */
.xb-error {
  text-align: center; padding: 4rem 1.5rem;
  min-height: 50vh;
}
.xb-error-code {
  font-size: 5rem; font-weight: 800;
  background: linear-gradient(135deg, var(--xb-accent), var(--xb-warm));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; line-height: 1;
}
.xb-error h1 { font-size: 1.4rem; margin: 1rem 0; }
.xb-error p { color: var(--xb-muted); margin-bottom: 1.5rem; }

/* 微动画 */
@keyframes xb-fade-up {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.xb-animate { animation: xb-fade-up .6s ease both; }

/* 引用块 */
.xb-quote {
  border-left: 4px solid var(--xb-warm);
  padding: 1rem 1.25rem;
  background: rgba(244,114,182,.06);
  border-radius: 0 var(--xb-radius) var(--xb-radius) 0;
  margin: 1.5rem 0;
  font-style: italic; color: #b8c5d8;
}

/* 标签 */
.xb-tags { display: flex; flex-wrap: wrap; gap: .5rem; margin: 1rem 0; }
.xb-tag {
  padding: .25rem .75rem; font-size: .78rem;
  border-radius: 999px;
  border: 1px solid var(--xb-border);
  color: var(--xb-accent);
}