:root{--orange:#cc741f;--orange-dark:#9f5315;--ink:#38291f;--muted:#89796d;--line:rgba(190,111,43,.2)}*{box-sizing:border-box}body{margin:0;font-family:"Microsoft YaHei",system-ui,sans-serif;color:var(--ink)}.auth-body{min-height:100vh;display:grid;place-items:center;padding:28px;background:radial-gradient(circle at 8% 7%,rgba(234,157,74,.22),transparent 27%),radial-gradient(circle at 94% 10%,rgba(204,116,31,.12),transparent 26%),linear-gradient(145deg,#fffdf9,#fff2e4);}.auth-body:before{content:"";position:fixed;inset:0;pointer-events:none;background-image:linear-gradient(rgba(204,116,31,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(204,116,31,.045) 1px,transparent 1px);background-size:52px 52px}.auth-shell{position:relative;display:grid;grid-template-columns:1.15fr .85fr;width:min(1040px,100%);min-height:570px;overflow:hidden;border:1px solid rgba(255,255,255,.92);border-radius:25px;background:rgba(255,255,255,.58);box-shadow:0 28px 82px rgba(112,65,26,.18);backdrop-filter:blur(15px)}.auth-intro{display:flex;flex-direction:column;justify-content:center;padding:70px}.eyebrow{margin:0 0 14px;color:var(--orange);font-size:12px;font-weight:900;letter-spacing:.13em}.auth-intro h1{margin:0;font-size:clamp(43px,5.8vw,76px);letter-spacing:-.06em;line-height:1.08}.auth-intro>p:not(.eyebrow){max-width:450px;margin:25px 0;color:#78695c;font-size:17px;line-height:1.7}.intro-tags{display:flex;flex-wrap:wrap;gap:10px}.intro-tags span{padding:9px 12px;border:1px solid var(--line);border-radius:999px;color:#9a5a20;background:rgba(255,255,255,.6);font-size:11px;font-weight:850}.auth-card{align-self:center;margin:38px;padding:36px;border:1px solid rgba(204,116,31,.16);border-radius:19px;background:rgba(255,255,255,.9);box-shadow:0 16px 42px rgba(119,68,27,.11)}.auth-mark{display:grid;width:47px;height:47px;place-items:center;margin-bottom:22px;border-radius:14px;color:#fff;background:linear-gradient(145deg,#e49a49,#b95f18);font-size:25px;font-weight:900;box-shadow:0 9px 18px rgba(185,95,24,.25)}.auth-card h2{margin:0 0 10px;font-size:26px}.auth-help{margin:0 0 23px;color:var(--muted);font-size:13px;line-height:1.65}.auth-card form{display:grid;gap:15px}.auth-card label{display:grid;gap:7px;font-size:13px;font-weight:800}.auth-card input{width:100%;height:46px;padding:0 13px;border:1px solid var(--line);border-radius:9px;outline:0;color:var(--ink);background:#fffaf5;font-size:15px}.auth-card input:focus{border-color:var(--orange);box-shadow:0 0 0 3px rgba(204,116,31,.12)}.auth-card button{height:47px;margin-top:5px;border:0;border-radius:9px;color:#fff;background:linear-gradient(90deg,#c3691d,#e0923f);font-size:15px;font-weight:900;cursor:pointer}.auth-card button:hover{background:linear-gradient(90deg,var(--orange-dark),#cf7927)}.auth-card button:disabled{opacity:.65;cursor:wait}.auth-error{min-height:18px;margin:0;color:#b34338;font-size:12px;font-weight:700}.change-shell{min-height:490px}@media(max-width:760px){.auth-body{padding:16px}.auth-shell{grid-template-columns:1fr;min-height:0}.auth-intro{padding:42px 30px 20px}.auth-intro h1{font-size:45px}.auth-intro>p:not(.eyebrow){margin:14px 0}.intro-tags{display:none}.auth-card{margin:22px;padding:28px}}

/* 手机登录首屏：身份输入与确认操作优先呈现，减少无效留白。 */
@media(max-width:760px){.auth-body{display:block;min-height:100svh;padding:0}.auth-shell{min-height:100svh;border:0;border-radius:0;background:rgba(255,255,255,.56);box-shadow:none}.auth-intro{justify-content:flex-start;padding:30px 24px 12px}.auth-intro .eyebrow{margin-bottom:7px;font-size:10px}.auth-intro h1{font-size:34px;line-height:1.08}.auth-intro>p:not(.eyebrow){display:none}.auth-card{align-self:start;margin:0 16px 26px;padding:22px 20px 24px;border-radius:17px}.auth-mark{width:38px;height:38px;margin-bottom:12px;border-radius:11px;font-size:20px}.auth-card>.eyebrow{margin-bottom:8px;font-size:10px}.auth-card h2{margin-bottom:7px;font-size:22px}.auth-help{margin-bottom:16px;font-size:12px;line-height:1.55}.auth-card form{gap:12px}.auth-card label{gap:6px}.auth-card input{height:50px;font-size:16px}.auth-card button{height:52px;margin-top:2px;font-size:16px}.auth-error{min-height:14px}}