/* ============================================================
   登录页样式 · V4 左右分屏（2026-11-03 宇哥确认版）
   左：品牌墙（品牌三段渐变 + LOGO 瓷片 + slogan + 水印）
   右：薄荷青浅底 + 白色表单卡
   ⚠ 功能相关的 id / class 必须保留：#f #u #p #btn #err
      .btn-login:disabled（登录中…）  .err-msg（错误提示）
   ============================================================ */

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

:root{
  --brand-1:#3ee0b2;   /* 薄荷 */
  --brand-2:#2fcbd8;   /* 青 */
  --brand-3:#3b9dfb;   /* 天蓝 */
  --brand-4:#4a6cf7;   /* 蓝 */
  --ink:#0f2a3d;
  --ink-2:#33526b;
  --mute:#8aa8bd;
  --line:#d7e9ea;
}

body{
  font-family:-apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
  min-height:100vh;
  display:grid;
  grid-template-columns:46% 54%;
  background:#eaf6f7;
}

/* ══════════ 左侧品牌墙 ══════════ */
.brand{
  position:relative; overflow:hidden;
  display:flex; align-items:center; justify-content:center;   /* 品牌块整体居中 */
  padding:0 56px;
  background:linear-gradient(150deg, var(--brand-1) 0%, var(--brand-2) 42%, var(--brand-3) 76%, var(--brand-4) 100%);
}
.brand::before{
  content:""; position:absolute; inset:-10%;
  background:
    radial-gradient(closest-side, rgba(255,255,255,.55), transparent) 20% 18%/52% 52% no-repeat,
    radial-gradient(closest-side, rgba(9,60,95,.22), transparent) 88% 84%/58% 58% no-repeat;
  filter:blur(6px);
}
.brand::after{
  content:""; position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.14) 1px, transparent 1px);
  background-size:54px 54px;
  -webkit-mask-image:linear-gradient(160deg,#000,transparent 72%);
  mask-image:linear-gradient(160deg,#000,transparent 72%);
}
.brand-wm{
  position:absolute; right:-46px; bottom:-34px; width:440px;
  opacity:.13; pointer-events:none; user-select:none;
}
.brand-in{ position:relative; z-index:2; color:#fff; text-align:center; }

.brand-mark{
  /* 横版瓷片：标本身是 1.42:1 的横构图，方形容器会在上下留出大片空白，
     显得「标很小」；瓷片贴合标比例后，标能真正撑满（2026-11-03 宇哥：图标再放大点）。 */
  width:260px; height:188px; border-radius:42px;
  display:flex; align-items:center; justify-content:center;
  background:rgba(255,255,255,.96);
  box-shadow:0 22px 50px rgba(4,60,80,.28), 0 0 0 6px rgba(255,255,255,.18);
  margin:0 auto 30px;
}
.brand-mark img{ height:169px; width:auto; display:block; }

.brand-title{
  font-size:40px; font-weight:800; letter-spacing:.5px;
  text-shadow:0 4px 24px rgba(6,60,80,.25);
}
.brand-sub{
  font-size:15px; letter-spacing:4px; margin-top:10px;
  color:rgba(255,255,255,.92);
}
.brand-line{
  width:64px; height:4px; border-radius:3px;
  background:rgba(255,255,255,.85);
  margin:26px auto 22px;
}
.brand-desc{
  font-size:13.5px; line-height:2; letter-spacing:.6px;
  color:rgba(255,255,255,.88);
}

/* ══════════ 右侧表单区 ══════════ */
.form-side{
  position:relative;
  display:flex; align-items:center; justify-content:center;
  padding:40px 24px;
  background:
    radial-gradient(760px 520px at 92% 2%, rgba(45,212,191,.34), transparent 64%),
    radial-gradient(700px 500px at 4% 100%, rgba(56,189,248,.30), transparent 64%),
    radial-gradient(520px 380px at 50% 46%, rgba(255,255,255,.28), transparent 70%),
    linear-gradient(155deg,#d2eee8 0%,#d1e5f8 52%,#daf2f1 100%);
}
.form-side::before{
  content:""; position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(13,148,136,.075) 1px, transparent 1px),
    linear-gradient(90deg, rgba(13,148,136,.075) 1px, transparent 1px);
  background-size:54px 54px;
  -webkit-mask-image:radial-gradient(circle at 50% 50%, #000 22%, transparent 74%);
  mask-image:radial-gradient(circle at 50% 50%, #000 22%, transparent 74%);
  pointer-events:none;
}

.card{
  position:relative; z-index:2;
  width:376px; max-width:100%;
  background:linear-gradient(180deg,#ffffff 0%,#fcfffe 100%);
  border:1px solid #d5ebe6;
  border-radius:18px;
  padding:38px 34px 26px;
  box-shadow:0 22px 58px rgba(10,88,112,.20), 0 2px 6px rgba(10,88,112,.06);
}
.form-title{
  /* 2026-11-03 宇哥：标题改成 Fast Delivery 并居中，下方说明文字去掉 */
  font-size:24px; font-weight:800; letter-spacing:.5px;
  text-align:center; margin-bottom:26px;
  background-image:linear-gradient(120deg,#0b9f86 0%,#0d93cf 55%,#2f6fe4 100%);
  -webkit-background-clip:text; background-clip:text;
  -webkit-text-fill-color:transparent; color:transparent;
}

.field{ margin-bottom:16px; }
.field label{
  display:block; font-size:13px; font-weight:600; color:var(--ink-2); margin-bottom:6px;
}
.field input{
  width:100%; padding:11px 14px;
  border:1px solid var(--line); border-radius:9px;
  font-size:15px; font-family:inherit; color:var(--ink);
  background:#f4fbfa; outline:none;
  transition:border-color .18s, box-shadow .18s, background .18s;
}
.field input::placeholder{ color:#9db4c7; }
.field input:focus{
  border-color:#12b886;
  box-shadow:0 0 0 3px rgba(18,184,134,.16);
  background:#fff;
}

.btn-login{
  width:100%; padding:12px; margin-top:8px;
  border:none; border-radius:9px;
  font-size:15px; font-weight:700; letter-spacing:2px; color:#fff;
  background:linear-gradient(120deg,#12b886 0%,#16b8c9 52%,#2f80ed 100%);
  box-shadow:0 10px 26px rgba(18,184,134,.28);
  cursor:pointer;
  transition:transform .12s, box-shadow .2s, filter .2s;
}
.btn-login:hover{ transform:translateY(-1px); box-shadow:0 14px 34px rgba(18,184,134,.4); }
.btn-login:active{ transform:translateY(0); }
.btn-login:disabled{ background:#b6c8d2; box-shadow:none; cursor:not-allowed; transform:none; }

.err-msg{
  color:#e11d48; font-size:13px; margin-top:10px; text-align:center;
  min-height:18px; line-height:1.5;
}
.footer{
  text-align:center; margin-top:20px;
  font-size:12px; color:#9db4c7; letter-spacing:1px;
}

/* ══════════ 自适应 ══════════ */
@media (max-width:1180px){
  body{ grid-template-columns:44% 56%; }
  .brand{ padding:0 44px; }
  .brand-mark{ width:214px; height:155px; border-radius:36px; margin-bottom:24px; }
  .brand-mark img{ height:139px; }
  .brand-title{ font-size:34px; }
  .brand-wm{ width:360px; }
}
@media (max-width:960px){
  /* ⚠ 必须 minmax(0,1fr) + card 宽度自适应：卡片固定 376px 会把网格列的
     min-content 撑到 416px，390px 手机屏直接横向溢出（实测 scrollWidth 416 > 390）。 */
  body{ grid-template-columns:minmax(0,1fr); grid-template-rows:auto 1fr; }
  .brand{ min-width:0; }
  .brand-in{ min-width:0; }
  .card{ width:100%; max-width:376px; }
  .brand{
    padding:26px 30px; min-height:0;
    flex-direction:row; justify-content:center;
  }
  .brand-in{ display:flex; align-items:center; gap:18px; flex-wrap:wrap; text-align:left; }
  .brand-mark{ width:118px; height:86px; border-radius:22px; margin:0; }
  .brand-mark img{ height:78px; }
  .brand-title{ font-size:26px; }
  .brand-sub{ font-size:12.5px; letter-spacing:2px; margin:0; }
  .brand-line, .brand-desc{ display:none; }
  .brand-wm{ width:260px; opacity:.10; right:-30px; bottom:-40px; }
  .form-side{ padding:34px 20px 44px; }
}
@media (max-width:520px){
  .card{ padding:30px 22px 22px; border-radius:16px; }
  .form-title{ font-size:21px; margin-bottom:22px; }
  .brand{ padding:20px 22px; }
  .brand-title{ font-size:22px; }
}