/* ===== 设计系统 - 清新商务风 ===== */
:root{
  --c-primary:#2563eb;
  --c-primary-dark:#1d4ed8;
  --c-primary-light:#dbeafe;
  --c-accent:#0891b2;
  --c-text:#0f172a;
  --c-text2:#475569;
  --c-text3:#94a3b8;
  --c-border:#e2e8f0;
  --c-bg:#f8fafc;
  --c-success:#059669;
  --ease-out:cubic-bezier(.16,1,.3,1);
  --ease:cubic-bezier(.4,0,.2,1);
}

*{margin:0;padding:0;box-sizing:border-box}

/* ===== 页面背景 - 柔和渐变 + 几何图案 ===== */
body{
  font-family:-apple-system,BlinkMacSystemFont,'SF Pro Display','Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
  background:
    linear-gradient(135deg,#eff6ff 0%,#f8fafc 40%,#f0fdfa 100%);
  min-height:100vh;display:flex;align-items:center;justify-content:center;
  position:relative;overflow:hidden;
}

/* 装饰性几何图形 */
.geo-pattern{
  position:fixed;top:0;left:0;width:100%;height:100%;
  pointer-events:none;z-index:0;overflow:hidden;
  opacity:.4;
}
.geo-shape{
  position:absolute;border-radius:50%;
  background:linear-gradient(135deg,var(--c-primary-light), transparent);
}
.geo-shape-1{width:400px;height:400px;top:-120px;left:-80px;animation:geoFloat1 15s ease-in-out infinite alternate}
.geo-shape-2{width:300px;height:300px;bottom:-80px;right:-60px;animation:geoFloat2 18s ease-in-out infinite alternate;background:linear-gradient(135deg,rgba(8,145,178,.12), transparent)}
.geo-shape-3{width:200px;height:200px;top:50%;left:50%;transform:translate(-50%,-50%);animation:geoFloat3 20s ease-in-out infinite alternate;background:linear-gradient(135deg,rgba(37,99,235,.08), transparent)}
@keyframes geoFloat1{from{transform:translate(0,0) rotate(0deg)}to{transform:translate(30px,20px) rotate(8deg)}}
@keyframes geoFloat2{from{transform:translate(0,0)}to{transform:translate(-25px,-15px)}}
@keyframes geoFloat3{from{transform:translate(-50%,-50%) scale(1)}to{transform:translate(-50%,-50%) scale(1.15)}}

/* ===== 主容器 ===== */
.login-container{
  width:900px;max-width:92vw;margin:24px;
  display:grid;grid-template-columns:380px 1fr;gap:0;
  background:#fff;border-radius:24px;
  box-shadow:
    0 28px 72px -12px rgba(15,23,42,.15),
    0 12px 24px -6px rgba(15,23,42,.06),
    inset 0 1px 0 rgba(255,255,255,.95),
    0 0 0 1px rgba(226,232,240,.6);
  position:relative;z-index:1;
  overflow:hidden;
  animation:containerSlideIn .7s var(--ease-out);
}
@keyframes containerSlideIn{
  from{opacity:0;transform:translateY(25px) scale(.97)}
  to{opacity:1;transform:translateY(0) scale(1)}
}

/* ===== 左侧品牌区 - 商务蓝调 ===== */
.brand-panel{
  background:linear-gradient(160deg,#1e40af 0%,#2563eb 45%,#0891b2 100%);
  color:#fff;padding:52px 36px;
  display:flex;flex-direction:column;justify-content:center;position:relative;overflow:hidden;
}

/* 装饰网格 */
.brand-panel::before{
  content:'';position:absolute;top:0;left:0;right:0;bottom:0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:36px 36px;
  pointer-events:none;
}
/* 光晕 */
.brand-panel::after{
  content:'';position:absolute;top:-70%;left:-50%;width:150%;height:150%;
  background:radial-gradient(ellipse,rgba(255,255,255,.10),transparent 65%);
  pointer-events:none;
}

/* Logo区域 */
.brand-logo{
  width:90px;height:90px;border-radius:22px;
  background:linear-gradient(135deg,rgba(255,255,255,.20), rgba(255,255,255,.03));
  backdrop-filter:blur(12px);
  display:flex;align-items:center;justify-content:center;
  box-shadow:
    0 10px 28px rgba(0,0,0,.16),
    inset 0 1px 0 rgba(255,255,255,.25);
  margin-bottom:26px;
  position:relative;z-index:1;
  animation:logoBreathe 4s ease-in-out infinite;
}
@keyframes logoBreathe{
  0%,100%{box-shadow:0 10px 28px rgba(0,0,0,.16),inset 0 1px 0 rgba(255,255,255,.25)}
  50%{box-shadow:0 14px 36px rgba(0,0,0,.20),inset 0 1px 0 rgba(255,255,255,.30)}
}

.brand-logo i{font-size:38px}

.brand-panel h1{
  font-size:27px;font-weight:800;letter-spacing:-.4px;line-height:1.2;
  margin-bottom:12px;text-shadow:0 2px 10px rgba(0,0,0,.10);
  position:relative;z-index:1;
}

.brand-panel .brand-tagline{
  font-size:14px;opacity:.88;line-height:1.7;font-weight:400;
  max-width:260px;margin-bottom:28px;position:relative;z-index:1;
}

/* 特性列表 */
.feature-list{
  list-style:none;position:relative;z-index:1;
}
.feature-list li{
  display:flex;align-items:center;gap:10px;
  padding:8px 0;font-size:13px;font-weight:500;
  opacity:.92;
}
.feature-list li i{
  width:22px;height:22px;border-radius:6px;
  background:rgba(255,255,255,.15);
  display:flex;align-items:center;justify-content:center;
  font-size:11px;flex-shrink:0;
}

/* ===== 右侧表单区 ===== */
.form-panel{
  padding:56px 48px;display:flex;flex-direction:column;justify-content:center;
  background:linear-gradient(to bottom right,#fff,#fafbff);
}

.form-header{margin-bottom:36px}
.form-header h2{
  font-size:27px;font-weight:800;color:var(--c-text);
  letter-spacing:-.3px;margin-bottom:6px;
}
.form-header .subtitle{
  color:var(--c-text3);font-size:14.5px;font-weight:400;
}

/* 表单组 */
.fg{margin-bottom:22px;position:relative}
.fg label{
  display:block;margin-bottom:7px;color:var(--c-text2);
  font-size:13px;font-weight:700;letter-spacing:.2px;
}
.fg .input-wrap{position:relative}
.fg input{
  width:100%;padding:13px 17px;padding-left:44px;
  border:1.8px solid var(--c-border);
  border-radius:13px;font-size:15px;transition:all .25s var(--ease);
  background:linear-gradient(to bottom,#fff,#fafcff);color:var(--c-text);
}
.fg input::placeholder{color:#94a3b8}
.fg input:focus{
  border-color:var(--c-primary);
  outline:none;background:#fff;
  box-shadow:0 0 0 4px rgba(37,99,235,.09),0 4px 14px rgba(37,99,235,.05);
  transform:translateY(-1px);
}

/* 输入框图标 */
.inp-icon{
  position:absolute;left:15px;top:50%;transform:translateY(-50%);
  font-size:16px;color:var(--c-text3);transition:color .25s;pointer-events:none;
}
.fg input:focus ~ .inp-icon{color:var(--c-primary)}

/* 密码切换按钮 */
.pwd-toggle{
  position:absolute;right:8px;top:50%;transform:translateY(-50%);
  width:34px;height:34px;border:none;background:transparent;
  cursor:pointer;border-radius:7px;color:var(--c-text3);
  transition:all .2s;display:flex;align-items:center;justify-content:center;
}
.pwd-toggle:hover{background:var(--c-primary);color:#fff}
.pwd-toggle.active{color:var(--c-success);background:#ecfdf5}

/* 功能行 */
.fg-row{
  display:flex;justify-content:space-between;align-items:center;
  margin-top:-6px;margin-bottom:22px;font-size:12.5px;color:var(--c-text3);
}
.fg-row label{
  display:flex;align-items:center;gap:5px;cursor:pointer;font-weight:normal;
  color:var(--c-text2);
}
.fg-row a{color:var(--c-primary);text-decoration:none;font-weight:600}
.fg-row a:hover{text-decoration:underline}

/* 登录按钮 */
.btn{
  width:100%;padding:14px;
  background:linear-gradient(135deg,var(--c-primary-dark),var(--c-primary));
  border:none;border-radius:13px;color:#fff;
  font-size:16px;font-weight:700;cursor:pointer;
  transition:all .3s var(--ease);
  box-shadow:0 5px 22px rgba(37,99,235,.30),0 2px 6px rgba(37,99,235,.12);
  letter-spacing:.5px;position:relative;overflow:hidden;
}
.btn::before{
  content:'';
  position:absolute;top:0;left:-100%;width:200%;height:100%;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.14),transparent);
  transition:left .5s ease;
}
.btn:hover::before{left:100%}
.btn:hover{
  transform:translateY(-2px);
  box-shadow:0 10px 30px rgba(37,99,235,.38),0 4px 12px rgba(37,99,235,.16);
}
.btn:active{transform:translateY(0)}
.btn:disabled{opacity:.55;transform:none;cursor:not-allowed}

/* 错误提示 */
.error{
  color:#dc2626;text-align:center;margin-top:14px;font-size:13.5px;
  display:none;padding:11px 16px;background:#fef2f2;border-radius:10px;
  border:1px solid #fecaca;line-height:1.55;font-weight:500;
  animation:errorShake .4s ease;
}
@keyframes errorShake{
  0%,100%{transform:translateX(0)}
  20%{transform:translateX(-6px)}
  40%{transform:translateX(6px)}
  60%{transform:translateX(-4px)}
  80%{transform:translateX(4px)}
}

/* 加载动画 */
.ld{
  display:inline-block;width:16px;height:16px;
  border:2.5px solid rgba(255,255,255,.28);
  border-top-color:#fff;border-radius:50%;
  animation:spin .6s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* 底部链接 */
.footer-links{
  margin-top:26px;text-align:center;font-size:12.5px;color:var(--c-text3);line-height:1.9
}
.footer-links a{color:var(--c-primary);text-decoration:none;font-weight:600}
.footer-links a:hover{color:var(--c-primary-dark)}

/* ===== 忘记密码弹窗 - 现代设计 ===== */
.fp-mask{
  position:fixed;inset:0;
  background:rgba(15,23,42,.55);
  backdrop-filter:blur(6px);
  z-index:9999;display:none;align-items:center;justify-content:center;
  padding:20px;animation:maskFade .25s ease;
}
.fp-mask.show{display:flex}
@keyframes maskFade{from{opacity:0}to{opacity:1}}

.fp-modal{
  background:#fff;border-radius:20px;
  width:100%;max-width:480px;padding:36px 32px;
  box-shadow:
    0 28px 72px rgba(0,0,0,.22),
    0 12px 24px rgba(0,0,0,.10);
  animation:modalUp .4s cubic-bezier(.16,1,.3,1);
  position:relative;
}
@keyframes modalUp{
  from{transform:translateY(24px) scale(.96);opacity:0}
  to{transform:translateY(0) scale(1);opacity:1}
}

.fp-close{
  position:absolute;top:16px;right:16px;
  width:32px;height:32px;border:none;
  background:#f1f5f9;border-radius:50%;
  cursor:pointer;font-size:15px;color:#64748b;
  display:flex;align-items:center;justify-content:center;
  transition:all .2s;
}
.fp-close:hover{background:#e2e8f0;color:#0f172a}

.fp-modal h3{
  font-size:21px;font-weight:800;color:var(--c-text);
  margin-bottom:6px;display:flex;align-items:center;gap:10px;
}
.fp-modal .fp-desc{
  font-size:13px;color:var(--c-text3);
  margin-bottom:24px;line-height:1.6;
}

.fp-step{display:none}
.fp-step.active{display:block}

.fp-step label{
  display:block;font-size:13px;font-weight:700;
  color:#334155;margin-bottom:7px;
}
.fp-step label .req{color:#dc2626;margin-left:2px}

.fp-step input{
  width:100%;padding:12px 15px;
  border:1.8px solid var(--c-border);border-radius:11px;
  font-size:14px;background:#fafbff;margin-bottom:12px;
  transition:all .2s var(--ease);
}
.fp-step input:focus{
  border-color:var(--c-primary);outline:none;
  background:#fff;
  box-shadow:0 0 0 3px rgba(37,99,235,.07);
}

.fp-hint{
  font-size:12px;color:#64748b;
  margin:-6px 0 12px;line-height:1.5;
  display:flex;align-items:start;gap:5px;
}

.fp-err{
  color:#dc2626;font-size:12px;
  margin:-6px 0 12px;display:none;
  padding:9px 12px;background:#fef2f2;
  border-radius:8px;border:1px solid #fecaca;
  line-height:1.5;
}

.fp-ok{
  color:#059669;font-size:12px;
  margin:-6px 0 12px;display:none;
  padding:9px 12px;background:#ecfdf5;
  border-radius:8px;border:1px solid #a7f3d0;
}

.fp-actions{display:flex;gap:10px;margin-top:10px}
.fp-actions button{
  flex:1;padding:12px;border-radius:11px;
  font-size:14px;font-weight:700;cursor:pointer;
  border:none;transition:all .2s;
}
.fp-actions .fp-cancel{
  background:#f1f5f9;color:#475569
}
.fp-actions .fp-cancel:hover{background:#e2e8f0}
.fp-actions .fp-confirm{
  background:linear-gradient(135deg,var(--c-primary-dark),var(--c-primary));
  color:#fff;box-shadow:0 4px 16px rgba(37,99,235,.22)
}
.fp-actions .fp-confirm:hover{
  transform:translateY(-1px);
  box-shadow:0 6px 22px rgba(37,99,235,.32)
}
.fp-actions .fp-confirm:disabled{opacity:.55;transform:none}

.fp-success{text-align:center;padding:16px 0}
.fp-success .success-icon{
  font-size:64px;margin-bottom:14px;display:block;
}
.fp-success h4{
  font-size:20px;font-weight:800;color:var(--c-success);margin-bottom:8px
}
.fp-success p{
  color:#475569;font-size:14px;line-height:1.6;margin-bottom:6px
}
.fp-success code{
  background:#f1f5f9;padding:3px 10px;border-radius:6px;
  color:#1d4ed8;font-size:14px;font-weight:700;
}

.pwd-strength{font-size:11.5px;margin-top:-6px;margin-bottom:10px;min-height:16px;color:#64748b}
.pwd-strength.s1{color:#dc2626}.pwd-strength.s2{color:#f59e0b}.pwd-strength.s3{color:#10b981}.pwd-strength.s4{color:#059669;font-weight:700}

/* ===== 响应式设计 ===== */
@media(max-width:768px){
  body{align-items:flex-start;background:var(--c-primary)}
  body .geo-pattern{display:none}
  
  .login-container{
    grid-template-columns:1fr;width:100%;max-width:100%;
    min-height:100dvh;margin:0;border-radius:0;box-shadow:none;
  }
  .brand-panel{
    padding:40px 28px 32px;
    background:linear-gradient(160deg,#1e40af 0%,#2563eb 60%,#0891b2 100%);
    border-radius:0 0 28px 28px;
  }
  .brand-logo{width:78px;height:78px;border-radius:18px;margin-bottom:18px}
  .brand-logo i{font-size:33px}
  .brand-panel h1{font-size:24px;margin-bottom:8px}
  .brand-panel .brand-tagline{font-size:13px;max-width:240px;margin-bottom:20px}
  .feature-list li{font-size:12px;padding:6px 0}
  
  .form-panel{padding:36px 28px 44px}
  .form-header h2{font-size:24px;margin-bottom:4px}
  .form-header .subtitle{font-size:13px;margin-bottom:28px}
  .fg{margin-bottom:19px}
  .fg label{font-size:12.5px}
  .fg input{padding:13px 15px;padding-left:41px;font-size:16px;border-radius:12px}
  .btn{padding:14px;font-size:16px;border-radius:12px;min-height:54px}
  .footer-links{margin-top:22px;font-size:12px}
}

@media(max-width:480px){
  .brand-panel{padding:34px 22px 26px}
  .brand-logo{width:70px;height:70px;margin-bottom:14px}
  .brand-logo i{font-size:30px}
  .brand-panel h1{font-size:22px}
  .brand-panel .brand-tagline{font-size:12px}
  
  .form-panel{padding:30px 22px 38px}
  .form-header h2{font-size:22px}
  .form-header .subtitle{font-size:12.5px;margin-bottom:24px}
  .fg{margin-bottom:17px}
  .fg input{padding:12px 14px;padding-left:39px;font-size:15.5px;border-radius:11px}
  .btn{padding:13px;font-size:15.5px;min-height:52px}
}

@media(max-width:380px){
  .brand-panel{padding:28px 18px 22px}
  .brand-logo{width:64px;height:64px;border-radius:16px;margin-bottom:12px}
  .brand-panel h1{font-size:20px}
  .form-panel{padding:26px 18px 34px}
  .form-header h2{font-size:20px}
  .fg{margin-bottom:15px}
}

/* ===== 联系管理员面板 ===== */
.fp-contact-list{display:flex;flex-direction:column;gap:10px}
.fp-contact-item{
  display:flex;align-items:center;gap:12px;padding:12px 14px;
  background:#f8fafc;border-radius:10px;border:1px solid var(--c-border);
  transition:all .2s;
}
.fp-contact-item:hover{background:#eef2ff;border-color:#c7d2fe}
.fp-contact-item i{font-size:18px;color:var(--c-primary);width:22px;text-align:center;flex-shrink:0}
.fp-contact-item strong{display:block;font-size:12px;color:var(--c-text3);font-weight:500;margin-bottom:1px}
.fp-contact-item .fp-copy-val{font-size:14px;font-weight:600;color:var(--c-text);word-break:break-all}
.fp-copy-btn{
  margin-left:auto;width:32px;height:32px;border:1px solid var(--c-border);
  background:#fff;border-radius:8px;cursor:pointer;display:flex;align-items:center;justify-content:center;
  font-size:13px;color:var(--c-text3);transition:all .2s;flex-shrink:0;
}
.fp-copy-btn:hover{background:var(--c-primary);color:#fff;border-color:var(--c-primary)}
.fp-contact-empty{text-align:center;padding:20px;color:var(--c-text3);font-size:13px}
.fp-contact-empty i{font-size:24px;display:block;margin-bottom:6px;opacity:.3}