/* SKY SMS — platform admin sign-in. Split layout: night-sky brand panel + form panel. */
:root{
  --sky-ink:#071423;--sky-ink-2:#0c2238;--sky-deep:#0b3b5c;
  --sky-accent:#0891b2;--sky-accent-2:#0d9488;--sky-accent-ink:#0e7490;--sky-glow:#5eead4;
  --sky-text:#0f1f2e;--sky-muted:#64748b;--sky-line:#d8e2e9;--sky-field:#f6f9fb;
  --sky-danger:#c2410c;--sky-danger-bg:#fff4ed
}
*{box-sizing:border-box}
html,body{height:100%}
body.sky-login{margin:0;min-height:100vh;display:grid;grid-template-columns:minmax(0,1.08fr) minmax(420px,1fr);background:#fff;color:var(--sky-text);font:14px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
button,input{font:inherit}
svg{fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* brand panel */
.sky-hero{position:relative;overflow:hidden;color:#e6f6fb;background:radial-gradient(120% 90% at 85% 100%,#0e5a78 0%,rgba(14,90,120,0) 60%),radial-gradient(80% 60% at 0% 0%,#123a5a 0%,rgba(18,58,90,0) 70%),linear-gradient(160deg,var(--sky-ink) 0%,var(--sky-ink-2) 55%,var(--sky-deep) 100%)}
.sky-hero-art{position:absolute;inset:0;width:100%;height:100%;color:#a5f3fc}
.sky-hero-art svg,.sky-hero-art g{stroke-width:1}
.sky-orbit-dot{transform-origin:640px 760px;animation:sky-orbit 38s linear infinite}
@keyframes sky-orbit{to{transform:rotate(360deg)}}
.sky-hero-inner{position:relative;height:100%;min-height:100vh;display:flex;flex-direction:column;padding:44px clamp(32px,5vw,72px)}
.sky-hero-brand{display:inline-flex;align-items:center;gap:12px;color:#fff;text-decoration:none}
.sky-hero-brand img{width:44px;height:44px;border-radius:12px;box-shadow:0 8px 24px rgba(8,145,178,.35)}
.sky-hero-brand b{display:block;font-size:18px;letter-spacing:.08em}
.sky-hero-brand small{display:block;color:#8fb3c7;font-size:12px;letter-spacing:.12em}
.sky-hero-copy{margin-top:auto;max-width:520px}
.sky-hero-copy h2{margin:0;font-size:clamp(30px,3.2vw,44px);line-height:1.22;font-weight:700;letter-spacing:.01em}
.sky-hero-copy h2 span{display:block}
.sky-hero-copy h2 span+span{background:linear-gradient(90deg,#67e8f9,#5eead4);-webkit-background-clip:text;background-clip:text;color:transparent}
.sky-hero-copy p{margin:18px 0 0;color:#9fbccd;font-size:15px}
.sky-hero-points{list-style:none;margin:40px 0 0;padding:0;display:grid;gap:12px;max-width:440px}
.sky-hero-points li{display:flex;align-items:center;gap:14px;padding:12px 14px;border:1px solid rgba(165,243,252,.12);border-radius:14px;background:rgba(255,255,255,.04);backdrop-filter:blur(6px)}
.sky-hero-points i{flex:0 0 38px;height:38px;display:grid;place-items:center;border-radius:11px;background:rgba(94,234,212,.12);color:var(--sky-glow)}
.sky-hero-points i svg{width:20px;height:20px}
.sky-hero-points b{display:block;font-size:14px;color:#f0fdff}
.sky-hero-points small{display:block;color:#8fb3c7;font-size:12px}
.sky-hero-foot{margin:auto 0 0;padding-top:40px;color:#6f93a8;font-size:12px;letter-spacing:.06em}

/* form panel */
.sky-panel{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;padding:72px 32px 56px;background:linear-gradient(180deg,#fff 0%,#f7fbfc 100%)}
.sky-lang{position:absolute;top:24px;right:28px;display:flex;padding:3px;border-radius:999px;background:#eef4f7}
.sky-lang button{height:28px;padding:0 13px;border:0;border-radius:999px;background:transparent;color:var(--sky-muted);font-size:12px;cursor:pointer}
.sky-lang button:hover{color:var(--sky-text)}
html[lang="zh-CN"] .sky-lang [data-admin-language="zh-CN"],html[lang="en-US"] .sky-lang [data-admin-language="en-US"]{background:#fff;color:var(--sky-accent-ink);font-weight:600;box-shadow:0 1px 3px rgba(15,31,46,.12)}
.sky-form-wrap{width:100%;max-width:380px}
.sky-mobile-mark{display:none}
.sky-form-wrap h1{margin:0;font-size:30px;line-height:1.25;letter-spacing:.01em}
.sky-lead{margin:8px 0 30px;color:var(--sky-muted)}
.sky-error{display:flex;align-items:center;gap:9px;margin:-10px 0 20px;padding:11px 14px;border-radius:12px;background:var(--sky-danger-bg);color:var(--sky-danger);font-size:13px}
.sky-error svg{flex:0 0 18px;width:18px;height:18px}
.sky-form{display:grid;gap:18px}
.sky-form label{display:grid;gap:8px;color:#334155;font-size:13px;font-weight:600}
.sky-field{position:relative;display:block}
.sky-field svg{position:absolute;left:14px;top:50%;width:18px;height:18px;transform:translateY(-50%);color:#94a3b8;pointer-events:none;transition:color .15s}
.sky-field input{width:100%;height:48px;padding:0 14px 0 44px;border:1px solid var(--sky-line);border-radius:12px;background:var(--sky-field);color:var(--sky-text);font-size:15px;font-weight:400;outline:0;transition:border-color .15s,box-shadow .15s,background .15s}
.sky-field input::placeholder{color:#a3b1bf}
.sky-field input:hover{border-color:#b9c9d4}
.sky-field input:focus{border-color:var(--sky-accent);background:#fff;box-shadow:0 0 0 4px rgba(8,145,178,.14)}
.sky-field:focus-within svg{color:var(--sky-accent)}
.sky-form>button{margin-top:8px;height:50px;display:flex;align-items:center;justify-content:center;gap:10px;border:0;border-radius:12px;background:linear-gradient(135deg,var(--sky-accent) 0%,var(--sky-accent-2) 100%);color:#fff;font-size:15px;font-weight:600;letter-spacing:.06em;cursor:pointer;box-shadow:0 10px 24px -8px rgba(8,145,178,.55);transition:transform .15s,box-shadow .15s,filter .15s}
.sky-form>button svg{width:18px;height:18px;stroke-width:2;transition:transform .15s}
.sky-form>button:hover{filter:brightness(1.05);box-shadow:0 14px 28px -10px rgba(8,145,178,.6)}
.sky-form>button:hover svg{transform:translateX(3px)}
.sky-form>button:active{transform:translateY(1px)}
.sky-form>button:focus-visible,.sky-lang button:focus-visible{outline:2px solid var(--sky-accent);outline-offset:3px}
.sky-secure{display:flex;align-items:center;justify-content:center;gap:7px;margin:24px 0 0;color:#94a3b8;font-size:12px}
.sky-secure svg{width:14px;height:14px}
.sky-panel-foot{position:absolute;bottom:22px;color:#a3b1bf;font-size:12px;letter-spacing:.06em}

@media (prefers-reduced-motion:reduce){.sky-orbit-dot{animation:none}.sky-form>button,.sky-form>button svg,.sky-field input{transition:none}}
@media (max-width:1100px){body.sky-login{grid-template-columns:minmax(0,.9fr) minmax(400px,1fr)}.sky-hero-points{display:none}}
@media (max-width:820px){
  body.sky-login{display:block;background:linear-gradient(180deg,var(--sky-ink) 0,var(--sky-deep) 220px,#f7fbfc 220px)}
  .sky-hero{display:none}
  .sky-panel{min-height:100vh;justify-content:flex-start;padding:96px 16px 64px;background:transparent}
  .sky-lang{top:18px;right:16px;background:rgba(255,255,255,.12)}
  .sky-lang button{color:#cfe6ef}
  .sky-form-wrap{max-width:440px;padding:28px 22px 26px;border-radius:20px;background:#fff;box-shadow:0 20px 50px -20px rgba(7,20,35,.45)}
  .sky-mobile-mark{display:block;width:52px;height:52px;margin:-56px 0 16px;border-radius:15px;box-shadow:0 10px 24px rgba(8,145,178,.35)}
  .sky-form-wrap h1{font-size:24px}
  .sky-lead{margin-bottom:24px}
  .sky-panel-foot{bottom:20px}
}

/* ── user sign-in (/login): daytime sky, centered card ── */
body.sky-portal{position:relative;margin:0;min-height:100vh;display:flex;flex-direction:column;align-items:center;overflow-x:hidden;color:var(--sky-text);font:14px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:linear-gradient(180deg,#0e7490 0%,#22a7c4 34%,#7dd3e3 64%,#e0f7fa 86%,#f7fdfe 100%)}
.sky-portal-art{position:fixed;inset:0;width:100%;height:100%;pointer-events:none}
.sky-portal-art,.sky-portal-art *{stroke:none}
.sky-cloud{opacity:.9}
.sky-cloud-a{opacity:.55;animation:sky-drift 70s linear infinite alternate}
.sky-cloud-b{opacity:.5;animation:sky-drift 90s linear infinite alternate-reverse}
.sky-cloud-c{opacity:.95}
.sky-cloud-d{opacity:.4;animation:sky-drift 60s linear infinite alternate}
@keyframes sky-drift{from{transform:translateX(-40px)}to{transform:translateX(60px)}}
.sky-portal-top{position:relative;z-index:1;width:100%;max-width:1200px;display:flex;align-items:center;justify-content:space-between;padding:22px 28px;box-sizing:border-box}
.sky-portal-brand{display:inline-flex;align-items:center;gap:10px;color:#fff;text-decoration:none}
.sky-portal-brand img{width:36px;height:36px;border-radius:10px;box-shadow:0 6px 18px rgba(7,20,35,.25)}
.sky-portal-brand b{font-size:16px;letter-spacing:.1em}
body.sky-portal .sky-lang{position:static;background:rgba(255,255,255,.18)}
body.sky-portal .sky-lang button{color:#ecfeff}
html[lang="zh-CN"] body.sky-portal .sky-lang [data-admin-language="zh-CN"],html[lang="en-US"] body.sky-portal .sky-lang [data-admin-language="en-US"]{color:var(--sky-accent-ink)}
.sky-portal-card{position:relative;z-index:1;width:100%;max-width:400px;margin:auto 16px;box-sizing:border-box;padding:40px 34px 32px;border-radius:24px;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);box-shadow:0 30px 80px -30px rgba(7,40,60,.55),0 0 0 1px rgba(255,255,255,.6) inset;text-align:left}
.sky-portal-mark{display:block;width:56px;height:56px;margin:-68px auto 18px;border-radius:16px;box-shadow:0 12px 28px rgba(8,145,178,.4)}
.sky-portal-card h1{margin:0;font-size:24px;text-align:center}
.sky-portal-card .sky-lead{margin:6px 0 26px;text-align:center}
.sky-portal-card .sky-error{margin:-8px 0 18px}
.sky-remember{display:flex!important;align-items:center;gap:8px;margin-top:-4px;color:var(--sky-muted)!important;font-weight:400!important;cursor:pointer}
.sky-remember input{width:16px;height:16px;margin:0;accent-color:var(--sky-accent)}
.sky-portal-foot{position:relative;z-index:1;padding:22px 0;color:#5b8a99;font-size:12px;letter-spacing:.06em}
@media (prefers-reduced-motion:reduce){.sky-cloud{animation:none}}
@media (max-width:640px){
  .sky-portal-top{padding:16px}
  .sky-portal-card{margin:48px 16px auto;padding:34px 22px 26px;max-width:none;width:calc(100% - 32px)}
}