/* 登录页：左边是「蛋白质工程发展史」粒子点刻短片（暖纸面放映框），右边是登录卡 */
body{background:#FBF7F0;color:#1B1D22}
/* 登录页始终浅色：它复用 app.css 的令牌，系统深色模式下会白底白字 */
.lg{--ink:#1B1D22;--ink2:#3D434D;--muted:#6B6358;--faint:#A39888;--surface:#FFFFFF;--surface2:#FFFDFA;
    --bg:#FBF7F0;--bg2:#F3ECE2;--line:#EFE5D6;--line2:#E3D9CB;--accent:#D9480F;--accent-2:#F08C00;
    --red:#C92A2A;--green:#2B8A3E;color:#1B1D22;color-scheme:light}
.lg{position:relative;min-height:100vh;display:grid;grid-template-columns:minmax(0,1fr) 388px;align-items:center;gap:72px;
    padding:56px 72px;background:radial-gradient(1000px 680px at 30% 46%,#FFF4E6 0%,rgba(255,244,230,0) 74%),#FBF7F0}

/* —— 放映框 —— */
.film{min-width:0;outline:none;max-width:680px;justify-self:center;width:100%}
.film:focus-visible .film-frame{box-shadow:0 0 0 2px #D9480F,0 28px 70px -34px rgba(120,70,30,.4)}
.film-frame{position:relative;border-radius:14px;overflow:hidden;background:#FBF7F0;
  border:1px solid #E7DCCB;box-shadow:0 28px 70px -34px rgba(120,70,30,.34),inset 0 0 0 10px #FBF7F0,inset 0 0 0 11px #F0E6D7}
.film-frame canvas{display:block;width:100%;aspect-ratio:1000/560;height:auto}
.film-frame .reg{position:absolute;width:13px;height:13px;border:1.5px solid #D9CBB6;opacity:.9}
.reg.r1{left:16px;top:16px;border-right:0;border-bottom:0}
.reg.r2{right:16px;top:16px;border-left:0;border-bottom:0}
.reg.r3{left:16px;bottom:16px;border-right:0;border-top:0}
.reg.r4{right:16px;bottom:16px;border-left:0;border-top:0}
.film-sprocket{position:absolute;left:0;right:0;bottom:0;height:11px;
  background:repeating-linear-gradient(90deg,transparent 0 13px,#EFE4D3 13px 21px);opacity:.75}
.film-sub{display:grid;gap:5px;padding:22px 4px 0;min-height:126px}
.sub-head{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap}
.sub-head b{font:800 34px/1 var(--font);letter-spacing:-.03em;
  background:linear-gradient(135deg,#D9480F,#F59F00);-webkit-background-clip:text;background-clip:text;color:transparent}
.sub-head span{font-size:17.5px;font-weight:700;letter-spacing:-.01em}
.film-sub p{margin:0;color:#4E4840;font-size:14px;line-height:1.8;max-width:56ch}
.sub-who{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;margin-top:2px}
.sub-who span{font-size:14px;font-weight:650;color:#A0522D}
.sub-who i{font-style:normal;font-size:12.5px;color:#9A8F80}
.film-timeline{display:flex;gap:0;margin-top:18px;padding:0 2px}
.film-timeline button{flex:1;border:0;background:none;padding:12px 0 0;position:relative;cursor:pointer;text-align:left;min-width:0;
  font:600 11px var(--mono);letter-spacing:.03em;color:#A99E8E}
.film-timeline button i{position:absolute;left:0;right:3px;top:0;height:3px;border-radius:3px;background:#E9DECC;display:block}
.film-timeline button.on{color:#D9480F}
.film-timeline button.on i{background:linear-gradient(90deg,#D9480F,#F59F00)}
.film-timeline button:hover i{background:#D9CBB6}
.film-timeline button span{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.credits{margin:18px 2px 0;font-size:11.5px;color:#A99E8E;max-width:64ch}
.credits summary{cursor:pointer;list-style:none;color:#A99E8E}
.credits summary::-webkit-details-marker{display:none}
.credits summary:before{content:"▸ "}
.credits[open] summary:before{content:"▾ "}
.credits summary:hover{color:#7A7064}
.credits p{margin:8px 0 6px;line-height:1.75}
.credits ul{margin:0;padding-left:1.1em;line-height:1.8}
.credits a{color:#A0522D}

/* —— 登录卡 —— */
.lg-card{justify-self:end;width:100%;max-width:404px;background:rgba(255,255,255,.88);backdrop-filter:blur(18px) saturate(1.3);
  -webkit-backdrop-filter:blur(18px) saturate(1.3);border:1px solid rgba(231,220,205,.9);border-radius:22px;
  padding:30px 32px 22px;box-shadow:0 30px 80px -30px rgba(120,60,20,.35),0 2px 6px rgba(120,60,20,.06)}
.lg-brand{display:flex;align-items:center;gap:11px;margin-bottom:20px}
.lg-brand img{width:40px;height:40px;border-radius:11px}
.lg-brand b{display:block;font-size:17px;letter-spacing:-.02em}
.lg-brand span{display:block;font-size:12.5px;color:#6B6358}
.lg-card h1{font-size:25px;margin:0} .lg-card .sub{color:#6B6358;margin:4px 0 18px;font-size:14px}
.lg-card .input{background:#FFFDFA;border-color:#E3D9CB;height:46px}
.seg{display:grid;grid-template-columns:1fr 1fr;background:#F3ECE2;border-radius:12px;padding:4px;margin-bottom:18px}
.seg button{border:0;background:none;height:36px;border-radius:9px;font:600 14px var(--font);color:#7A7064;cursor:pointer}
.seg button.on{background:#fff;color:#1B1D22;box-shadow:0 1px 3px rgba(0,0,0,.08)}
.pane{display:none} .pane.on{display:block;animation:fadein .35s ease}
@keyframes fadein{from{opacity:0;transform:translateY(8px)}}
.pw{position:relative} .pw .input{padding-right:46px}
.eye{position:absolute;right:6px;top:5px;width:36px;height:36px;border:0;background:none;color:#9A9084;cursor:pointer;display:grid;place-items:center;border-radius:8px}
.eye.on{color:#D9480F} .eye svg{width:19px;height:19px;fill:none;stroke:currentColor;stroke-width:1.8}
.trust{display:flex;align-items:center;gap:8px;font-size:13px;color:#5E574E;margin:14px 0 4px;cursor:pointer}
.trust input{width:16px;height:16px;accent-color:#D9480F}
.wide{width:100%;height:48px;margin-top:12px;font-size:15px;border-radius:12px}
.qr-box{position:relative;width:216px;height:216px;margin:4px auto 10px;border-radius:16px;background:#fff;border:1px solid #EADFD0;padding:14px;box-shadow:0 10px 30px -18px rgba(120,60,20,.4)}
.qr-img svg{width:100%;height:100%;display:block} .qr-img path{fill:#1B1D22}
.qr-mask{position:absolute;inset:0;border-radius:16px;background:rgba(255,253,250,.94);display:none;place-items:center;text-align:center;font-size:14px;color:#3D372F;padding:20px;cursor:pointer}
.qr-mask.on{display:grid} .qr-mask b{display:block;font-size:16px;margin-bottom:4px;color:#1B1D22}
.qr-status{text-align:center;font-size:14px;color:#5E574E;min-height:22px}
.lg-foot{text-align:center;color:#A39888;font-size:12px;margin-top:20px}
.lg-card .alert{background:#FFF4E0;color:#9A5B00} .lg-card .alert.err{background:#FDECEC;color:#C92A2A}

@media (max-width:1240px){.lg{grid-template-columns:minmax(0,1fr) 360px;gap:40px;padding:36px 32px}.film{max-width:560px}.sub-head b{font-size:30px}}
@media (max-width:980px){
  .lg{grid-template-columns:minmax(0,1fr);gap:24px;padding:26px 18px 36px;align-items:start}
  .film{max-width:none}
  .film{order:1} .lg-card{order:2;justify-self:center;max-width:460px}
  .film-sub{min-height:0;padding-top:14px} .sub-head b{font-size:30px} .sub-head span{font-size:17px}
  .film-sub p{font-size:13.5px}
  .film-timeline button span{display:none} .film-timeline button{padding-top:10px}
  .credits{display:none}
}
@media (max-width:560px){
  .film-frame{border-radius:10px;box-shadow:0 18px 40px -26px rgba(120,70,30,.34),inset 0 0 0 6px #FBF7F0,inset 0 0 0 7px #F0E6D7}
  .film-frame .reg{display:none}
  .sub-head b{font-size:26px} .sub-head span{font-size:15.5px}
  .lg-card{padding:24px 20px 18px}
}
@media (prefers-reduced-motion:reduce){.pane.on{animation:none}}