/* “Open in Safari to continue” 引导弹窗：独立覆盖层，不占用页面布局。
   参考 mm 项目的底部弹窗（标题 + 步骤图 + 复制链接）交互。 */
.sg-overlay{position:fixed;inset:0;z-index:2147483000;display:none;align-items:flex-end;justify-content:center;background:rgba(6,10,20,.72);-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);color:#17203a;font:15px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;letter-spacing:normal;text-transform:none;text-align:start}
.sg-overlay.sg-open{display:flex}
.sg-sheet{position:relative;box-sizing:border-box;width:min(500px,100%);max-height:min(92vh,760px);overflow-y:auto;overscroll-behavior:contain;padding:14px 16px calc(20px + env(safe-area-inset-bottom));border-radius:26px 26px 0 0;background:#fff;box-shadow:0 -18px 60px rgba(0,0,0,.4);animation:sg-slide-up .3s cubic-bezier(.4,0,.2,1)}
.sg-sheet *{box-sizing:border-box}
.sg-handle{width:42px;height:4px;margin:0 auto 15px;border-radius:999px;background:#dfe3ec}
.sg-close{position:absolute;top:11px;inset-inline-end:14px;width:32px;height:32px;padding:0;border:0;border-radius:50%;background:#f1f3f8;color:#5b6782;font:inherit;font-size:20px;line-height:1;cursor:pointer}
.sg-title{padding-inline-end:38px;margin:0;color:#17203a;font-size:19px;font-weight:900;line-height:1.2}
.sg-sub{margin:6px 0 12px;color:#66728d;font-size:13px;line-height:1.55}
.sg-hero{margin:2px 0 10px;overflow:hidden;border:1px solid rgba(24,32,51,.06);border-radius:16px;background:#f3f6ff}
.sg-hero img{display:block;width:100%;height:auto}
.sg-steps{display:grid;gap:8px;margin-top:10px}
.sg-step{display:flex;gap:10px;align-items:flex-start;padding:10px;border:1px solid rgba(24,32,51,.06);border-radius:14px;background:#fafbff}
.sg-num{display:flex;align-items:center;justify-content:center;flex:0 0 26px;width:26px;height:26px;border-radius:9px;background:#eef2ff;color:#3750b8;font-size:12px;font-weight:900}
.sg-copy{margin:0;color:#71809d;font-size:12px;line-height:1.5}
.sg-copy b{color:#17203a}
.sg-btn{display:flex;align-items:center;justify-content:center;width:100%;height:50px;margin-top:14px;border:0;border-radius:14px;background:linear-gradient(135deg,#4f6fff,#6f5cff);color:#fff;font:inherit;font-size:15px;font-weight:900;cursor:pointer}
.sg-note{margin:10px 0 0;color:#9ba4b8;text-align:center;font-size:11px;line-height:1.55}
.sg-ok{display:none;margin-top:10px;padding:10px 12px;border-radius:10px;background:#eaf6ea;color:#2e7d32;text-align:center;font-size:12px;font-weight:800}
.sg-ok.sg-show{display:block}
.sg-toast{position:fixed;left:50%;bottom:22px;z-index:2147483100;margin:0;padding:10px 14px;border-radius:999px;background:#17203a;color:#fff;font-size:12px;font-weight:700;opacity:0;pointer-events:none;transform:translate(-50%,20px);transition:opacity .2s ease,transform .2s ease}
.sg-toast.sg-show{opacity:1;transform:translate(-50%,0)}
body.sg-locked{overflow:hidden}
/* 本弹窗显示时，隐藏 facebook-guide.js 生成的同类 Safari 引导，避免两个弹窗叠加。 */
body.sg-guide-open #fb-browser{display:none!important}
@keyframes sg-slide-up{from{transform:translateY(100%)}to{transform:translateY(0)}}
@media (prefers-reduced-motion:reduce){.sg-sheet{animation:none}}