/* ==========================================================================
   JuMeng docs · 协议静态页
   设计语言：iOS 液态玻璃 / 毛玻璃 · 高级简约（浅色）
   ========================================================================== */

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: #1c1c1e;
  background: #f2f2f7;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC",
    "Helvetica Neue", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(58% 46% at 12% 4%, rgba(0, 122, 255, 0.14), transparent 62%),
    radial-gradient(50% 42% at 94% 8%, rgba(175, 82, 222, 0.12), transparent 64%),
    radial-gradient(52% 46% at 84% 92%, rgba(48, 176, 199, 0.12), transparent 66%),
    radial-gradient(44% 38% at 6% 88%, rgba(255, 45, 85, 0.07), transparent 62%),
    linear-gradient(180deg, #fafafd 0%, #f2f2f7 44%, #ebeef3 100%);
}

::selection { background: rgba(0, 122, 255, 0.22); }

.doc {
  width: min(820px, calc(100% - 40px));
  margin: 0 auto;
  padding: 48px 0 80px;
}

.back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 38px;
  padding: 9px 16px;
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: 980px;
  color: #007aff;
  background: rgba(255, 255, 255, 0.72);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.9),
    0 0 0 0.5px rgba(60, 60, 67, 0.07),
    0 8px 24px -14px rgba(31, 41, 55, 0.2);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.18s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.2s;
}
.back:hover { transform: translateY(-1px); }
.back:active { transform: scale(0.97); }

.kicker {
  margin: 0 0 10px;
  color: #007aff;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Consolas, monospace;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.doc h1 {
  margin: 0 0 18px;
  font-size: clamp(34px, 5.4vw, 52px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.lead {
  margin: 0 0 44px;
  padding-bottom: 30px;
  border-bottom: 1px solid rgba(60, 60, 67, 0.12);
  color: rgba(60, 60, 67, 0.68);
  font-size: 18px;
  line-height: 1.75;
}

.doc h2 {
  margin: 44px 0 10px;
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.02em;
  scroll-margin-top: 24px;
}

.doc p { margin: 0; color: #3a3a3c; font-size: 16px; }

.doc strong { color: #1c1c1e; }

.doc ul,
.doc ol { margin: 12px 0 18px; padding-left: 1.5em; color: #3a3a3c; font-size: 16px; }

.doc li { margin: 6px 0; padding-left: 4px; }

.doc li::marker { color: #007aff; }

.doc blockquote {
  margin: 20px 0;
  padding: 16px 20px;
  border: 1px solid rgba(0, 122, 255, 0.16);
  border-left: 4px solid #007aff;
  border-radius: 4px 16px 16px 4px;
  background: rgba(0, 122, 255, 0.08);
  color: #3a3a3c;
}

.doc code {
  padding: 2px 7px;
  border-radius: 7px;
  background: rgba(120, 120, 128, 0.14);
  color: #1c1c1e;
  font: 0.9em ui-monospace, SFMono-Regular, "SF Mono", Consolas, monospace;
}

.doc hr { margin: 36px 0; border: 0; border-top: 1px solid rgba(60, 60, 67, 0.12); }

.doc footer {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid rgba(60, 60, 67, 0.12);
  color: rgba(60, 60, 67, 0.4);
  font-size: 12px;
  line-height: 1.8;
}

.doc footer a { color: #007aff; text-decoration: none; }

@media (max-width: 600px) {
  .doc { width: min(100% - 32px, 820px); padding: 32px 0 56px; }
  .back { margin-bottom: 30px; }
  .lead { font-size: 16px; margin-bottom: 36px; }
  .doc h2 { margin-top: 34px; font-size: 20px; }
}