:root { color: #10233f; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", sans-serif; background: #f4f8ff; }
* { box-sizing: border-box; }
body { min-width: 320px; min-height: 100vh; margin: 0; }
.login-shell { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(360px, .75fr); min-height: 100vh; }
.brand-panel { position: relative; display: flex; flex-direction: column; overflow: hidden; padding: 52px clamp(42px, 6vw, 96px) 84px; background: radial-gradient(circle at 75% 46%, rgba(51, 134, 255, .18), transparent 30%), linear-gradient(145deg, #edf5ff 0%, #fbfdff 65%, #e9f4ff 100%); }
.brand { position: relative; z-index: 1; display: flex; align-items: center; gap: 13px; }
.brand img { width: 52px; height: 52px; object-fit: contain; filter: drop-shadow(0 10px 22px rgba(35, 112, 255, .24)); }
.brand div { display: grid; gap: 2px; }
.brand strong { font-size: 21px; letter-spacing: .05em; }
.brand small { color: #61799d; font-size: 10px; letter-spacing: .16em; }
.brand-copy { position: relative; z-index: 1; max-width: 620px; margin: auto 0; padding: 70px 0; }
.brand-copy > span { display: inline-flex; align-items: center; color: #1265e9; font-size: 15px; font-weight: 850; line-height: 1.5; letter-spacing: .13em; }
.brand-copy h1 { margin: 16px 0 22px; color: #0b2458; font-size: clamp(42px, 5vw, 72px); line-height: 1.1; letter-spacing: -.055em; }
.brand-copy p { max-width: 560px; margin: 0; color: #506987; font-size: 15px; line-height: 1.9; }
.hero-mark { position: absolute; z-index: 0; top: 50%; right: 5%; width: min(34vw, 410px); height: min(34vw, 410px); object-fit: contain; opacity: .94; filter: drop-shadow(0 34px 48px rgba(31, 101, 221, .24)); transform: translateY(-50%); }
.security-points { position: relative; z-index: 1; display: flex; flex-wrap: wrap; gap: 10px; }
.security-points span { padding: 10px 13px; border: 1px solid #d5e3fa; border-radius: 10px; color: #244b7b; background: rgba(255,255,255,.76); box-shadow: 0 8px 22px rgba(31,91,176,.06); font-size: 12px; }
.login-panel { display: grid; place-items: center; padding: 42px; background: #fff; }
.login-card { width: min(100%, 380px); text-align: center; }
.shield { display: grid; place-items: center; width: 54px; height: 54px; margin: 0 auto 24px; border-radius: 18px; color: #fff; background: linear-gradient(145deg, #1676ed, #0c5dc9); box-shadow: 0 14px 26px rgba(20,102,216,.25); font-size: 25px; font-weight: 850; }
.login-card > small:first-of-type { color: #1a6de0; font-size: 10px; font-weight: 850; letter-spacing: .2em; }
.login-card h2 { margin: 12px 0 10px; color: #10233f; font-size: 27px; }
.login-card > p { margin: 0 auto 26px; color: #667a95; font-size: 13px; line-height: 1.8; }
.wecom-button { display: block; padding: 13px 18px; border-radius: 11px; color: #fff; background: #08a15f; box-shadow: 0 12px 24px rgba(8,161,95,.2); text-decoration: none; font-size: 15px; font-weight: 800; }
.wecom-button:hover { background: #078e55; }
.pending-note { display: grid; gap: 5px; margin-top: 22px; padding: 14px; border: 1px solid #d9e7f7; border-radius: 11px; color: #4c6380; background: #f6f9fe; text-align: left; }
.pending-note strong { color: #1b365c; font-size: 12px; }
.pending-note span { font-size: 11px; line-height: 1.7; }
.privacy-note { display: block; margin-top: 18px; color: #8a9aae; font-size: 10px; line-height: 1.6; }
footer { position: fixed; z-index: 10; bottom: 8px; left: 50%; padding: 7px 13px; border: 1px solid rgba(15,23,42,.1); border-radius: 999px; background: rgba(255,255,255,.92); box-shadow: 0 4px 16px rgba(15,23,42,.07); transform: translateX(-50%); backdrop-filter: blur(10px); }
footer a { color: #64748b; text-decoration: none; white-space: nowrap; font-size: 12px; }
@media (max-width: 900px) { .login-shell { grid-template-columns: 1fr; } .brand-panel { display: none; } .login-panel { min-height: 100vh; padding: 28px; } }