:root{--ink:#251716;--muted:#866e65;--red:#981f25;--red-dark:#761217;--gold:#bd945f;--line:#e9dccc;--paper:#fcf8f1}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;font-family:'Noto Sans SC','Microsoft YaHei',sans-serif;color:var(--ink)}
button,input{font:inherit}
button{cursor:pointer}
body{background:#170d0c}
.stage{display:grid;grid-template-columns:minmax(0,1fr) minmax(430px,480px);min-height:100vh;max-width:1600px;margin:auto;box-shadow:0 0 80px #0008}
.art{min-height:100vh;position:relative;background:#281513 url('/static/img/bg1.jpg') center 40%/cover no-repeat;overflow:hidden}
.art::before{content:'';position:absolute;inset:0;background:linear-gradient(90deg,#140a0bb8 0%,#160d0b12 52%,#170d0c55 100%),linear-gradient(0deg,#100807c9 0%,transparent 50%)}
.art::after{content:'';position:absolute;inset:18px;border:1px solid #e8bb7960;pointer-events:none}
.art-content{position:absolute;left:clamp(44px,8vw,130px);bottom:9%;max-width:490px;color:#fff5e7;text-shadow:0 4px 24px #100806}
.eyebrow{display:flex;align-items:center;gap:14px;font-size:14px;letter-spacing:.46em;color:#e5bd83;font-weight:600}
.eyebrow span{display:block;width:33px;height:1px;background:#d9a967}
.art h1{font-family:'Noto Serif SC',serif;font-weight:700;font-size:clamp(45px,5.2vw,84px);letter-spacing:.11em;line-height:1.38;margin:18px 0 16px}
.art h1 em{font-style:normal;color:#f8d299}
.art p{font-size:16px;letter-spacing:.12em;color:#f3e4d5;margin:0}
.panel-wrap{position:relative;min-height:100vh;background:radial-gradient(circle at 90% 1%,#f7ead9 0%,transparent 28%),linear-gradient(150deg,#fffaf3,#f4e9db);display:flex;align-items:center;justify-content:center;padding:58px 42px 48px}
.panel-wrap::before{content:'';position:absolute;inset:14px;border:1px solid #cfb38c70;pointer-events:none}
.panel{position:relative;width:100%;max-width:390px;z-index:1}
.preview-ribbon{position:absolute;top:31px;right:35px;color:#987458;font-size:11px;letter-spacing:.08em}
.brand-mark{margin:0 auto 17px;width:132px;height:47px;border:1px solid #ba9368;border-radius:30px;display:grid;place-items:center;color:var(--red);font-family:'Noto Serif SC',serif;font-size:19px;letter-spacing:.12em;font-weight:700;box-shadow:inset 0 0 0 4px #f9efe1,0 0 0 1px #d5ba98}
.panel-kicker{text-align:center;color:#ac8a68;letter-spacing:.3em;font-size:12px;margin:0 0 7px}
h2{text-align:center;font-family:'Noto Serif SC',serif;font-size:29px;letter-spacing:.15em;margin:0 0 29px;font-weight:700}
.main-tabs{display:grid;grid-template-columns:1fr 1fr;border-bottom:1px solid #d8c4a9;margin-bottom:19px}
.main-tab{border:0;background:transparent;padding:0 0 15px;font-size:17px;color:#9c8073;position:relative}
.main-tab.active{color:var(--red);font-weight:700}
.main-tab.active::after{content:'';position:absolute;bottom:-1px;left:28%;width:44%;height:3px;background:var(--red)}
.mode-tabs{display:flex;gap:24px;margin:0 0 22px}
.mode-tab{border:0;background:none;padding:4px 0;color:#957d70;font-size:13px;letter-spacing:.04em}
.mode-tab.active{color:var(--ink);font-weight:700}
.mode-tab.active::before{content:'◆';font-size:7px;color:var(--gold);margin-right:7px;vertical-align:2px}
.field{margin:0 0 14px}
.field label{display:block;font-size:12px;color:#6f5448;letter-spacing:.08em;margin:0 0 7px}
.input-shell{display:flex;align-items:center;height:49px;border:1px solid #dac5ad;background:#fffdf9;transition:border-color .2s,box-shadow .2s}
.input-shell:focus-within{border-color:#ac723e;box-shadow:0 0 0 3px #c59a6c26}
.input-shell input{width:100%;min-width:0;height:100%;border:0;background:transparent;outline:0;padding:0 15px;color:var(--ink);font-size:14px}
.input-shell input::placeholder{color:#b6a59b}
.toggle-password{width:43px;min-width:43px;align-self:stretch;border:0;background:transparent;color:#a28777;display:grid;place-items:center;padding:0}
.toggle-password:hover,.toggle-password[aria-pressed="true"]{color:var(--red)}
.toggle-password svg{width:19px;height:19px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.input-shell .prefix{padding-left:15px;font-size:14px;color:#60483c;border-right:1px solid #dfcdbb;padding-right:12px}
.code-button{white-space:nowrap;align-self:stretch;border:0;border-left:1px solid #e2d1bc;background:#f7ead9;color:var(--red);font-weight:700;padding:0 14px;font-size:12px}
.code-button:hover{background:#f0ddc1}
.code-button:disabled{color:#a99487;cursor:default;background:#f7f0e7}
.form-bottom{min-height:39px;display:flex;align-items:center;justify-content:space-between;margin-top:4px;color:#8b756b;font-size:12px}
.form-bottom a,.form-bottom button{border:0;background:none;color:#9c2528;padding:0;text-decoration:none}
.form-bottom a:hover,.form-bottom button:hover,.switch-prompt button:hover{text-decoration:underline}
.check-label{display:flex;align-items:flex-start;gap:8px;line-height:1.6;cursor:pointer}
.check-label input{accent-color:var(--red);margin:3px 0 0}
.check-label a{color:var(--red);text-decoration:none;font-weight:700}
.check-label a:hover{text-decoration:underline}
.primary-button{width:100%;height:52px;border:1px solid #ad3132;background:linear-gradient(135deg,#ab2c31,#7c151d);color:#fff5e9;letter-spacing:.3em;font-weight:700;font-size:16px;box-shadow:0 7px 18px #79202827;transition:transform .16s,filter .16s}
.primary-button:hover{transform:translateY(-2px);filter:brightness(1.08)}
.primary-button span{float:right;margin-right:14px;letter-spacing:0;font-size:21px;font-weight:400;line-height:20px}
.divider{display:flex;align-items:center;gap:14px;margin:23px 0 11px;color:#bca995;font-size:11px}
.divider::before,.divider::after{content:'';height:1px;background:var(--line);flex:1}
.switch-prompt{text-align:center;color:#826e62;margin:0;font-size:13px}
.switch-prompt button{border:0;background:transparent;color:var(--red);font-weight:700;padding:0 2px}
.preview-note{font-size:11px;color:#a48d7f;text-align:center;line-height:1.6;margin:27px 8px 0}
.footer{position:absolute;bottom:25px;color:#b7a394;font-size:11px;letter-spacing:.15em}
.toast{position:fixed;z-index:10;left:50%;bottom:34px;transform:translate(-50%,20px);max-width:min(90vw,420px);background:#291917;color:#fff7ea;padding:12px 19px;border:1px solid #c3a172;box-shadow:0 12px 32px #0005;font-size:13px;text-align:center;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s}
.toast.visible{opacity:1;transform:translate(-50%,0)}
@media (max-width:850px), (max-device-width:850px){
  html,body{width:100%;overflow-x:hidden}
  .stage{display:block;width:100%;max-width:none;min-width:0;min-height:100vh;min-height:100svh;overflow:hidden}
  .art{position:fixed;inset:0;width:100%;min-height:0;background-position:center 35%;filter:brightness(.67)}
  .art::before{background:#170d0c77}
  .art::after,.art-content{display:none!important}
  .panel-wrap{position:relative;z-index:1;width:100%;max-width:100%;min-width:0;min-height:100vh;min-height:100svh;background:transparent;padding:32px 16px;display:flex;align-items:center;justify-content:center;flex-direction:column}
  .panel-wrap::before{display:none}
  .panel{width:100%;max-width:420px;margin:0 auto;background:#fcf8f1f0;backdrop-filter:blur(12px);padding:28px 26px 23px;border:1px solid #d6b88f;box-shadow:0 18px 60px #0b0304b3}
  .preview-ribbon{top:13px;right:21px;color:#f5d8ac}
  .footer{display:none}
}
@media(max-width:420px){.panel-wrap{padding-left:14px;padding-right:14px}.panel{padding:25px 20px 21px}h2{margin-bottom:24px}.preview-note{margin-top:19px}}