/* 本知中枢统一登录页：仅负责视觉呈现，登录接口与状态逻辑由 central-login.js 维护。 */
:root{
  color-scheme:light;
  --vi-font-cn:"PingFang SC","Microsoft YaHei UI","Microsoft YaHei",system-ui,sans-serif;
  --vi-font-serif:"Noto Serif SC","Songti SC",SimSun,serif;
  --vi-font-size-root:16px;
  --vi-font-size-body:16px;
  --vi-font-size-h1:38px;
  --vi-font-size-h2:28px;
  --vi-line-body:1.7;
  --vi-line-heading:1.3;
  --vi-radius-card:18px;
  --vi-radius-control:10px;
}
*{box-sizing:border-box}
html{font-size:var(--vi-font-size-root);min-height:100%;background:var(--vi-color-cream,#F3EEE2)}
body{
  min-height:100vh;
  margin:0;
  background:
    radial-gradient(circle at 12% 8%,rgba(216,181,108,.16),transparent 34rem),
    linear-gradient(180deg,var(--vi-color-cream,#F3EEE2),var(--vi-color-cream,#F3EEE2));
  color:var(--vi-color-ink,#24231F);
  font:var(--vi-font-size-body)/var(--vi-line-body) var(--vi-font-cn);
  letter-spacing:.01em;
}
a{color:inherit;text-decoration:none}
header{
  max-width:1120px;
  margin:auto;
  padding:24px clamp(24px,5vw,72px);
  display:flex;
  align-items:center;
  justify-content:space-between;
  border-bottom:1px solid color-mix(in srgb,var(--vi-color-line,#D9CEBA) 72%,transparent);
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--vi-color-ink,#24231F);
  font:600 26px/1.2 var(--vi-font-serif);
  letter-spacing:.13em;
}
.brand img{width:42px;height:42px;object-fit:contain}
.brand span{display:grid;gap:2px}
.brand b{font:600 18px/1.2 var(--vi-font-serif);letter-spacing:.08em;color:var(--vi-color-ink,#24231F)}
.brand small{font:700 9px/1 var(--vi-font-cn);letter-spacing:.17em;color:var(--vi-color-gold,#805A25)}
header>a:last-child{
  color:var(--vi-color-text-secondary,#665F53);
  font-size:14px;
  padding:8px 12px;
  border:1px solid transparent;
  border-radius:var(--vi-radius-control);
  transition:background .18s ease,border-color .18s ease,color .18s ease;
}
header>a:last-child:hover{background:var(--vi-color-canvas,#FFFAF0);border-color:var(--vi-color-line,#D9CEBA);color:var(--vi-color-ink,#24231F)}
main{
  width:min(640px,100%);
  min-height:calc(100vh - 154px);
  margin:0 auto;
  padding:clamp(42px,8vh,86px) 24px 58px;
  display:flex;
  align-items:flex-start;
  justify-content:center;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  color:var(--vi-color-gold,#805A25);
  font-size:12px;
  font-weight:700;
  letter-spacing:.16em;
  margin:0 0 20px;
}
.eyebrow::before{content:"";width:24px;height:1px;background:var(--vi-color-gold,#805A25)}
h1,h2{font-family:var(--vi-font-serif);font-weight:500;color:var(--vi-color-ink,#24231F)}
h1,h2{font-size:var(--vi-font-size-h2);line-height:1.35;letter-spacing:.03em;margin:0 0 8px}
.login-card{
  width:100%;
  position:relative;
  overflow:hidden;
  border:1px solid var(--vi-color-line,#D9CEBA);
  background:var(--vi-color-canvas,#FFFAF0);
  border-radius:var(--vi-radius-card);
  padding:38px 40px 36px;
  box-shadow:0 18px 44px rgba(36,35,31,.08);
}
.login-card::before{content:"";position:absolute;inset:0 0 auto;height:4px;background:var(--vi-color-gold,#805A25)}
.login-card>.eyebrow{margin-bottom:16px}
.subtitle{color:var(--vi-color-text-secondary,#665F53);font-size:14px;margin:0 0 24px}
.status{
  background:var(--vi-color-gold-light,#E8DECA);
  border:1px solid var(--vi-color-line,#D9CEBA);
  border-radius:var(--vi-radius-control);
  padding:13px 15px;
  color:var(--vi-color-ink,#24231F);
  font-size:14px;
  line-height:1.55;
  margin-bottom:24px;
  overflow-wrap:anywhere;
}
#login-methods{display:grid;gap:0}
button,.action-link{
  font:600 15px/1.4 var(--vi-font-cn);
  width:100%;
  min-height:48px;
  padding:12px 16px;
  border-radius:var(--vi-radius-control);
  cursor:pointer;
  text-align:center;
  display:flex;
  align-items:center;
  justify-content:center;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease;
}
button:hover:not(:disabled),.action-link:hover{transform:translateY(-1px);box-shadow:0 7px 16px rgba(36,35,31,.1)}
.primary{background:var(--vi-color-action-surface,#A33F13);color:var(--onAction,#FFFAF0);border:1px solid var(--vi-color-action-surface,#A33F13)}
.secondary{background:transparent;color:var(--vi-color-ink,#24231F);border:1px solid var(--vi-color-line,#D9CEBA)}
.secondary:hover{background:var(--vi-color-gold-light,#E8DECA);border-color:var(--vi-color-gold,#805A25)}
button:disabled{cursor:not-allowed;opacity:.56;transform:none;box-shadow:none}
button:focus-visible,a:focus-visible{outline:3px solid var(--vi-color-action-surface,#A33F13);outline-offset:4px}
.method-note{font-size:12px;line-height:1.55;color:var(--vi-color-text-secondary,#665F53);margin:9px 0 21px;overflow-wrap:anywhere}
.text-button{width:auto;min-height:44px;border:0;background:none;color:var(--vi-color-text-secondary,#665F53);font-size:13px;font-weight:500;text-decoration:underline;margin:17px auto 0;padding:4px 8px}
.text-button:hover{color:var(--vi-color-action-surface,#A33F13);box-shadow:none;transform:none}
#current-account{margin:0 0 18px;padding:15px 16px;border:1px solid color-mix(in srgb,var(--vi-color-line,#D9CEBA) 82%,transparent);border-radius:var(--vi-radius-control);background:color-mix(in srgb,var(--vi-color-gold-light,#E8DECA) 64%,var(--vi-color-canvas,#FFFAF0))}
#current-account p:first-child{margin:0 0 5px;font:600 16px/1.5 var(--vi-font-serif)}
#current-account .method-note{margin:0 0 17px}
#current-account .secondary{margin-top:12px}
.account-help{border-top:1px solid var(--vi-color-line,#D9CEBA);padding-top:18px;margin:18px 0 0;font-size:12px;line-height:1.65;color:var(--vi-color-text-secondary,#665F53)}
[hidden]{display:none!important}
footer{text-align:center;padding:0 24px 28px;font-size:12px;color:var(--vi-color-text-secondary,#665F53);letter-spacing:.08em}
/* LOGIN-SHELL-ALIGN-20260913: 登录前、已核验和退出后的页面共用同一层级契约。
   状态只改变内容，不改变页面几何；从登录跳转回来不会出现第二套壳。 */
.member-page{overflow-x:hidden}
.member-page .member-header,.member-page .member-main,.member-page .member-footer{min-width:0}
.member-page .member-header{background:color-mix(in srgb,var(--vi-color-cream,#F3EEE2) 94%,transparent)}
.member-page .member-main{align-items:center}
.member-page .login-card,.member-page .status,.member-page #current-account{border-radius:var(--vi-radius-card,var(--vi-radius-control))}
.member-page img,.member-page svg{max-width:100%;height:auto}
.member-page[data-page-state="authenticated"] .login-card::before{background:var(--vi-color-action-surface,#A33F13)}
.member-page[data-page-state="step-up"] .login-card::before{background:var(--vi-color-gold,#805A25)}
.member-page[data-page-state="step-up"] .status{margin-bottom:16px;background:transparent;border-width:0 0 0 3px;border-radius:0;padding:4px 0 4px 13px}
.member-page[data-page-state="step-up"] #current-account .primary{display:none}
.member-page[data-page-state="step-up"] #current-account .secondary{display:none}
.member-page[data-page-state="step-up"] #current-account{margin-bottom:16px;padding:13px 15px}
.member-page[data-page-state="step-up"] #login-methods{border-top:1px solid var(--vi-color-line,#D9CEBA);padding-top:18px}
.member-page[data-page-state="blocked"] .login-card::before{background:var(--vi-color-gold,#805A25)}
@media(max-width:900px){.member-page .member-main{display:grid}.member-page .login-card{width:100%}}
@media(max-width:900px){
  header{padding:20px 24px}
  main{min-height:0;max-width:640px;padding:44px 24px 56px}
  .login-card{padding:30px 24px}
}
@media(max-width:480px){
  .brand img{width:38px;height:38px}
  .brand b{font-size:16px}
  header>a:last-child{font-size:13px}
  main{padding-top:38px}
  h1,h2{font-size:25px}
  .login-card{border-radius:14px}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}
}

/* Keep authentication outside the app sidebar, but use the same compact
   header/card/control proportions as the knowledge-work surfaces. */
.member-page .member-header{max-width:1600px;min-height:64px;gap:24px;padding:8px clamp(16px,3vw,32px);background:var(--vi-color-canvas,#FFFAF0);border:1px solid var(--vi-color-line,#D9CEBA);border-top:0;border-radius:0 0 var(--vi-radius-card) var(--vi-radius-card)}
.member-page .brand img{width:38px;height:38px}
.member-page .member-main{width:min(520px,100%);min-height:calc(100vh - 134px);padding:24px 16px 32px;align-items:center}
.member-page .login-card{padding:30px 32px;box-shadow:var(--shadow,0 10px 28px rgba(36,35,31,.055))}
.member-page .login-card::before{height:3px}
.member-page .status{margin-bottom:18px;padding:12px 16px;line-height:1.7}
.member-page button,.member-page .action-link{min-height:44px}
.member-page .member-footer{padding-bottom:16px}
@media(max-width:600px){.member-page .login-card{padding:24px 20px}.member-page .member-main{min-height:calc(100vh - 120px);padding-top:18px}.member-page .member-header{border-radius:0}}

/*A11Y-390-20261101: 手机上登录页页头两个链接（章标、返回首页）的可点区不小于 44px。*/
@media(max-width:600px){
  .member-page .member-header .brand{min-height:44px}
  .member-page .member-header>a:last-child{display:inline-flex;align-items:center;min-height:44px}
}