/* xlweb.click — 杏吧小蓝官方入口主题（海洋渐变 · 轻量毛玻璃） */
:root {
  --xbk-navy: #0c2d5a;
  --xbk-deep: #061829;
  --xbk-sky: #4db8ff;
  --xbk-coral: #ff7557;
  --xbk-gold: #ffc857;
  --xbk-mint: #5eead4;
  --xbk-paper: #f0f6fc;
  --xbk-white: #ffffff;
  --xbk-ink: #1a2f4a;
  --xbk-muted: #5a7189;
  --xbk-line: rgba(12, 45, 90, 0.1);
  --xbk-glass: rgba(255, 255, 255, 0.72);
  --xbk-glass-strong: rgba(255, 255, 255, 0.88);
  --xbk-shadow: 0 16px 48px rgba(6, 24, 41, 0.12);
  --xbk-glow: 0 0 32px rgba(77, 184, 255, 0.35);
  --xbk-r-sm: 12px;
  --xbk-r-md: 20px;
  --xbk-r-lg: 28px;
  --xbk-head-h: 64px;
  --xbk-float-h: 0px;
  --xbk-font: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--xbk-font);
  background:
    radial-gradient(circle at 8% 12%, rgba(77, 184, 255, 0.18), transparent 42%),
    radial-gradient(circle at 92% 6%, rgba(255, 117, 87, 0.14), transparent 38%),
    linear-gradient(168deg, #e8f2fb 0%, var(--xbk-paper) 38%, #dceaf7 100%);
  color: var(--xbk-ink);
  line-height: 1.85;
  min-height: 100vh;
  overflow-x: hidden;
}

body.xbk-float-on { padding-top: var(--xbk-float-h); }

a { color: var(--xbk-navy); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--xbk-coral); }

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

.xbk-skip {
  position: absolute; left: -9999px; top: 0; z-index: 9999;
  background: var(--xbk-coral); color: #fff; padding: 8px 16px; border-radius: 8px;
}
.xbk-skip:focus { left: 8px; top: 8px; }

/* ===== 顶栏 ===== */
.xbk-top {
  position: sticky; top: 0; z-index: 1000;
  background: var(--xbk-glass-strong);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  border-bottom: 1px solid var(--xbk-line);
  box-shadow: 0 4px 24px rgba(6, 24, 41, 0.06);
}

.xbk-top-inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1080px; margin: 0 auto;
  padding: 12px 18px;
  padding-top: calc(12px + env(safe-area-inset-top, 0px));
}

.xbk-brand {
  display: flex; align-items: center; gap: 10px;
  color: var(--xbk-navy); font-weight: 800; font-size: 1.05rem;
}
.xbk-brand img {
  width: 38px; height: 38px; border-radius: 10px;
  box-shadow: var(--xbk-glow);
}

.xbk-ham {
  display: flex; flex-direction: column; justify-content: center; gap: 5px;
  width: 44px; height: 44px; background: none; border: none;
  cursor: pointer; padding: 10px; z-index: 3001;
  -webkit-tap-highlight-color: transparent;
}
.xbk-ham span {
  display: block; width: 22px; height: 2.5px;
  background: var(--xbk-navy); border-radius: 3px;
  transition: transform 0.26s, opacity 0.26s;
}
.xbk-ham[aria-expanded="true"] span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.xbk-ham[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.xbk-ham[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

.xbk-menu {
  position: fixed; z-index: 3000;
  top: 0; left: 0; width: 100%; height: 100dvh;
  padding: calc(var(--xbk-head-h, 64px) + 28px) 24px 28px;
  background: rgba(240, 246, 252, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transform: translateX(100%);
  transition: transform 0.32s cubic-bezier(0.4, 0, 0.2, 1);
  overflow-y: auto;
}
.xbk-menu.is-open { transform: translateX(0); }

.xbk-menu a {
  display: block; padding: 16px 0;
  font-size: 1.12rem; font-weight: 600;
  color: var(--xbk-ink);
  border-bottom: 1px solid var(--xbk-line);
}
.xbk-menu a.is-active { color: var(--xbk-coral); }

@media (min-width: 920px) {
  .xbk-ham { display: none; }
  .xbk-menu {
    position: static; height: auto; width: auto;
    padding: 0; transform: none; overflow: visible;
    background: transparent; backdrop-filter: none;
    display: flex; gap: 6px; align-items: center;
  }
  .xbk-menu a {
    padding: 8px 16px; font-size: 0.92rem; font-weight: 600;
    border: none; border-radius: 999px;
    transition: background 0.2s, color 0.2s;
  }
  .xbk-menu a:hover { background: rgba(77, 184, 255, 0.12); }
  .xbk-menu a.is-active { background: var(--xbk-navy); color: #fff; }
}

body.menu-open { overflow: hidden; }

/* ===== 固定下载条 ===== */
.xbk-dl-strip {
  position: fixed; top: var(--xbk-head-h, 64px); left: 0; right: 0; z-index: 999;
  background: var(--xbk-glass-strong);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--xbk-line);
  padding: 8px 12px;
  transform: translateY(-110%);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.28s, opacity 0.28s;
}
.xbk-dl-strip.is-show {
  transform: translateY(0); opacity: 1; pointer-events: auto;
}

.xbk-dl-wrap { max-width: 1080px; margin: 0 auto; }

.xbk-dl-grid {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: 8px 6px;
}
.xbk-dl-grid .xbk-ad-unit {
  width: calc(20% - 6px);
  max-width: 72px;
  display: flex; flex-direction: column; align-items: center;
}
.xbk-dl-grid .xbk-ad-unit a { display: block; }
.xbk-dl-grid .xbk-ad-unit img {
  width: 58px; height: 58px; border-radius: 14px;
  object-fit: cover;
  box-shadow: 0 4px 14px rgba(6, 24, 41, 0.1);
  transition: transform 0.18s;
}
.xbk-dl-grid .xbk-ad-unit img:hover { transform: scale(1.05); }
.xbk-dl-grid .xbk-ad-label {
  font-size: 10px; color: var(--xbk-muted);
  text-align: center; margin-top: 3px;
  max-width: 68px; overflow: hidden;
  text-overflow: ellipsis; white-space: nowrap;
}

@media (min-width: 920px) {
  .xbk-dl-grid .xbk-ad-unit { width: calc(12.5% - 6px); }
  .xbk-dl-grid .xbk-ad-unit img { width: 52px; height: 52px; }
}

/* ===== 顶部推广区 ===== */
.xbk-promo-top {
  max-width: 1080px; margin: 0 auto;
  padding: 10px 14px 0;
}
.xbk-promo-top .xbk-dl-grid { gap: 10px 8px; }
.xbk-promo-top.is-loaded { padding-bottom: 6px; }

/* ===== 主内容 ===== */
.xbk-page {
  max-width: 1080px; margin: 0 auto;
  padding: 0 18px 64px;
}

/* Hero */
.xbk-hero {
  position: relative;
  margin: 20px 0 36px;
  padding: 36px 24px 40px;
  background: linear-gradient(135deg, var(--xbk-navy) 0%, #1a5080 55%, #2569a8 100%);
  border-radius: var(--xbk-r-lg);
  color: #fff;
  overflow: hidden;
  box-shadow: var(--xbk-shadow);
}
.xbk-hero::before {
  content: "";
  position: absolute; top: -40%; right: -20%;
  width: 60%; height: 120%;
  background: radial-gradient(circle, rgba(255, 200, 87, 0.25), transparent 65%);
  pointer-events: none;
}
.xbk-hero::after {
  content: "";
  position: absolute; bottom: -2px; left: 0; right: 0; height: 48px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 48'%3E%3Cpath fill='%23f0f6fc' d='M0 48V20c200-30 400 30 600 0s400 30 600 0v28H0z'/%3E%3C/svg%3E") center/cover no-repeat;
}
.xbk-hero-grid {
  position: relative; z-index: 1;
  display: grid; gap: 28px;
}
@media (min-width: 768px) {
  .xbk-hero-grid { grid-template-columns: 1.1fr 0.9fr; align-items: center; }
}
.xbk-hero-tag {
  display: inline-block;
  padding: 5px 14px; margin-bottom: 14px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px; font-size: 0.82rem; font-weight: 600;
  backdrop-filter: blur(8px);
}
.xbk-hero h1 {
  font-size: clamp(1.45rem, 4.5vw, 2rem);
  line-height: 1.35; font-weight: 800; margin-bottom: 16px;
}
.xbk-hero-lead { font-size: 0.95rem; opacity: 0.92; line-height: 1.78; }
.xbk-hero-visual img {
  border-radius: var(--xbk-r-md);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
  margin: 0 auto;
  max-height: 420px; object-fit: cover; width: 100%;
}

/* 模块 */
.xbk-zone { margin-bottom: 44px; }

.xbk-zone-head { margin-bottom: 22px; }
.xbk-zone-head h2 {
  font-size: clamp(1.2rem, 3.5vw, 1.55rem);
  color: var(--xbk-navy); font-weight: 800;
  margin-bottom: 8px;
}
.xbk-zone-head p { color: var(--xbk-muted); font-size: 0.92rem; }

.xbk-prose p { margin-bottom: 1.1em; text-align: justify; }
.xbk-prose h3 {
  font-size: 1.08rem; color: var(--xbk-navy);
  margin: 1.6em 0 0.7em; font-weight: 700;
}

/* 卡片 */
.xbk-cards {
  display: grid; gap: 16px;
}
@media (min-width: 600px) { .xbk-cards.cols-2 { grid-template-columns: 1fr 1fr; } }
@media (min-width: 768px) { .xbk-cards.cols-3 { grid-template-columns: repeat(3, 1fr); } }

.xbk-card {
  background: var(--xbk-glass);
  backdrop-filter: blur(10px);
  border: 1px solid var(--xbk-line);
  border-radius: var(--xbk-r-md);
  padding: 22px 20px;
  box-shadow: 0 4px 20px rgba(6, 24, 41, 0.05);
  transition: transform 0.22s, box-shadow 0.22s;
}
.xbk-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--xbk-shadow);
}
.xbk-card-icon {
  width: 44px; height: 44px; border-radius: 12px;
  background: linear-gradient(135deg, var(--xbk-sky), var(--xbk-mint));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; margin-bottom: 14px;
  color: #fff; font-weight: 700;
}
.xbk-card h3 { font-size: 1rem; color: var(--xbk-navy); margin-bottom: 8px; }
.xbk-card p { font-size: 0.88rem; color: var(--xbk-muted); line-height: 1.72; }

/* 图文 */
.xbk-media-row {
  display: grid; gap: 24px; align-items: center;
}
@media (min-width: 768px) {
  .xbk-media-row { grid-template-columns: 1fr 1fr; }
  .xbk-media-row.reverse { direction: rtl; }
  .xbk-media-row.reverse > * { direction: ltr; }
}
.xbk-media-frame {
  border-radius: var(--xbk-r-md);
  overflow: hidden;
  box-shadow: var(--xbk-shadow);
  border: 3px solid var(--xbk-white);
}
.xbk-media-frame img { width: 100%; }

/* 步骤 */
.xbk-steps { counter-reset: step; }
.xbk-step {
  position: relative; padding-left: 52px; margin-bottom: 20px;
}
.xbk-step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute; left: 0; top: 2px;
  width: 36px; height: 36px; border-radius: 50%;
  background: linear-gradient(135deg, var(--xbk-coral), var(--xbk-gold));
  color: #fff; font-weight: 800; font-size: 0.9rem;
  display: flex; align-items: center; justify-content: center;
}
.xbk-step h3 { font-size: 1rem; color: var(--xbk-navy); margin-bottom: 6px; }
.xbk-step p { font-size: 0.9rem; color: var(--xbk-muted); }

/* 下载按钮 */
.xbk-dl-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 28px; margin-top: 12px;
  background: linear-gradient(135deg, var(--xbk-coral), #ff9478);
  color: #fff !important; font-weight: 700; font-size: 0.95rem;
  border-radius: 999px;
  box-shadow: 0 8px 24px rgba(255, 117, 87, 0.35);
  transition: transform 0.2s, box-shadow 0.2s;
}
.xbk-dl-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(255, 117, 87, 0.45);
  color: #fff !important;
}

/* 面包屑 */
.xbk-crumb {
  padding: 16px 0 8px;
  font-size: 0.84rem; color: var(--xbk-muted);
}
.xbk-crumb a { color: var(--xbk-sky); }
.xbk-crumb span { margin: 0 6px; opacity: 0.5; }

/* 法律页 */
.xbk-legal {
  background: var(--xbk-glass);
  border: 1px solid var(--xbk-line);
  border-radius: var(--xbk-r-lg);
  padding: 32px 24px;
  box-shadow: 0 4px 24px rgba(6, 24, 41, 0.06);
}
.xbk-legal h1 {
  font-size: clamp(1.3rem, 4vw, 1.7rem);
  color: var(--xbk-navy); margin-bottom: 20px;
}
.xbk-legal h2 {
  font-size: 1.08rem; color: var(--xbk-navy);
  margin: 1.8em 0 0.6em; font-weight: 700;
}
.xbk-legal p, .xbk-legal li {
  font-size: 0.92rem; color: var(--xbk-ink); margin-bottom: 0.8em;
}
.xbk-legal ul { padding-left: 1.4em; margin-bottom: 1em; }

/* 错误页 */
.xbk-err {
  text-align: center; padding: 60px 20px 80px;
}
.xbk-err-code {
  font-size: clamp(4rem, 15vw, 7rem);
  font-weight: 900;
  background: linear-gradient(135deg, var(--xbk-navy), var(--xbk-sky));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 16px;
}
.xbk-err h1 { font-size: 1.3rem; color: var(--xbk-navy); margin-bottom: 12px; }
.xbk-err p { color: var(--xbk-muted); margin-bottom: 24px; }

/* 页脚 */
.xbk-foot {
  background: var(--xbk-navy);
  color: rgba(255, 255, 255, 0.75);
  padding: 32px 18px;
  padding-bottom: calc(32px + env(safe-area-inset-bottom, 0px));
  text-align: center;
}
.xbk-foot-nav {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: 8px 20px; margin-bottom: 16px;
}
.xbk-foot-nav a {
  color: rgba(255, 255, 255, 0.85); font-size: 0.88rem; font-weight: 500;
}
.xbk-foot-nav a:hover { color: var(--xbk-gold); }
.xbk-foot-copy { font-size: 0.78rem; opacity: 0.6; }

/* 微动画 */
@keyframes xbk-fade-up {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
.xbk-animate { animation: xbk-fade-up 0.6s ease both; }