/* ============================================================
   登录/注册页样式（login.html）
   与 index.html 统一规范：
   - 基底：纯白底色
   - 主色：亮蓝（品牌 / 选中态 / 主功能）
   - 点缀：红 / 金 仅用于活动福利营销
   - 文字：黑色主力信息、浅灰次级辅助
   - 质感：扁平化、小圆角、无强投影、无渐变（营销除外）
   ============================================================ */
:root {
  --primary: #1677ff;        /* 亮蓝主色 */
  --primary-2: #3b8bff;
  --primary-soft: #eaf2ff;   /* 浅蓝底 */
  --gold: #ffb800;           /* 金：活动福利点缀 */
  --gold-deep: #b8860b;
  --bg: #ffffff;             /* 纯白基底 */
  --card: #ffffff;
  --card-alt: #f7f8fa;       /* 浅灰卡片 */
  --text: #111827;           /* 黑色主力信息 */
  --text-sub: #6b7280;       /* 浅灰次级文字 */
  --text-light: #9ca3af;
  --border: #eef0f3;
  --radius-lg: 12px;
  --radius-md: 8px;
  --radius-sm: 6px;
  --shadow-card: 0 1px 2px rgba(17, 24, 39, .05);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; padding: 0; min-height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px 14px calc(20px + env(safe-area-inset-bottom, 0px));
  overflow-x: hidden;
}

.page {
  width: 100%;
  max-width: 400px;
}

/* LOGO 标题 */
.brand {
  text-align: center;
  margin-bottom: 22px;
}
.brand .logo {
  display: inline-flex;
  width: 60px; height: 60px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  margin-bottom: 12px;
}
.brand .logo img { width: 100%; height: 100%; object-fit: cover; }
.brand h1 {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
}
.brand p {
  margin: 4px 0 0;
  color: var(--text-light);
  font-size: 12px;
}
.brand p b { color: var(--gold-deep); font-weight: 600; }

/* 卡片 */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

/* Tab 切换（选中态蓝色高亮） */
.auth-tabs {
  display: flex;
  border-bottom: 1px solid #f0f1f3;
}
.auth-tab {
  flex: 1; text-align: center;
  padding: 13px 0 11px;
  font-size: 15px; color: var(--text-sub); cursor: pointer;
  position: relative;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color .15s;
  font-weight: 500;
}
.auth-tab.active {
  color: var(--primary); font-weight: 600;
  border-bottom-color: var(--primary);
}

/* 表单 */
.form-wrap { padding: 20px 20px 24px; }
.auth-form { display: none; }
.auth-form.active { display: block; animation: fadein .2s ease; }
@keyframes fadein { from { opacity: 0; transform: translateY(4px);} to { opacity: 1; transform: translateY(0);} }

.row { margin-bottom: 13px; }
.row label {
  display: block;
  font-size: 12px;
  color: var(--text-sub);
  margin-bottom: 6px;
}
.row input {
  width: 100%;
  padding: 11px 13px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 14px;
  outline: none;
  background: var(--card-alt);
  transition: border-color .15s, background .15s;
}
.row input:focus {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(22, 119, 255, .08);
}
.row input::placeholder { color: #bbb; }

/* 验证码行 */
.captcha-row {
  display: flex; gap: 8px; align-items: stretch;
}
.captcha-row input {
  flex: 1; min-width: 0;
  padding: 11px 13px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 14px;
  outline: none;
  background: var(--card-alt);
  letter-spacing: 2px;
}
.captcha-row input:focus {
  border-color: var(--primary); background: #fff;
  box-shadow: 0 0 0 3px rgba(22, 119, 255, .08);
}
.captcha-img {
  flex: 0 0 116px;
  height: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: #f5f6f8;
  cursor: pointer;
  overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  user-select: none;
  font-size: 12px; color: var(--text-light);
  transition: border-color .15s;
}
.captcha-img:hover { border-color: var(--primary); }
.captcha-img img { width: 100%; height: 100%; display: block; object-fit: cover; pointer-events: none; }

/* 按钮（主功能纯蓝 / 促销金色，胶囊按钮与全站一致） */
.submit-btn {
  width: 100%;
  height: 42px;
  border: none;
  border-radius: 21px;
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 10px;
  transition: transform .1s, opacity .12s;
}
.submit-btn:active { transform: scale(.98); }
.submit-btn:disabled { background: #d9dce1; cursor: not-allowed; }
.submit-btn.gold {
  background: linear-gradient(120deg, #f59e0b, #ffb800);
  color: #5b3a00;
  font-weight: 700;
}
.submit-btn.gold:disabled { background: #eee6d0; color: #a08f63; }

/* 底部提示 */
.foot-hint {
  text-align: center;
  margin-top: 16px;
  font-size: 12px;
  color: var(--text-light);
  line-height: 1.8;
}
.foot-hint b { color: var(--gold-deep); font-weight: 700; }
.foot-hint .hl { color: var(--primary); font-weight: 600; }

.link-back {
  text-align: center;
  margin-top: 14px;
}
.link-back a {
  color: var(--text-light);
  font-size: 12px;
  text-decoration: none;
}
.link-back a:active { color: var(--primary); }

/* Toast */
.toast {
  position: fixed;
  top: 40px; left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, .8);
  color: #fff;
  padding: 9px 18px;
  border-radius: 20px;
  font-size: 13px;
  z-index: 9999;
  display: none;
  max-width: 85%;
  text-align: center;
}
.toast.show { display: block; animation: t-in .2s; }


/* ========== 移动端优化 ========== */
/* 小屏手机 (≤375px) */
@media (max-width: 375px) {
  .page { padding: 16px 16px; }
  .logo { width: 56px; height: 56px; }
  .brand h1 { font-size: 19px; }
  .brand p { font-size: 12px; }
  .form-wrap { padding: 16px 14px; }
  .auth-tab { padding: 12px 0; font-size: 14px; }
  .row input { font-size: 14px; padding: 10px 8px; }
  .captcha-row input { font-size: 14px; }
  .captcha-img { width: 92px; height: 38px; }
  .submit-btn { font-size: 15px; height: 40px; }
  .foot-hint { font-size: 12px; }
}

/* 大屏手机 (376px-414px) */
@media (max-width: 414px) {
  .page { padding: 20px 20px; }
  .form-wrap { padding: 18px 16px; }
}

/* 平板/桌面 (768px+) - 纯白基底 + 内容限宽居中，与 index 一致 */
@media (min-width: 768px) {
  body { background: #f7f8fa; }
  .page { max-width: 400px; background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow-card); padding: 32px 28px; margin: 24px auto; }
  .brand { margin-bottom: 20px; }
}

/* 横屏适配 */
@media (max-height: 500px) and (orientation: landscape) {
  body { padding: 10px 20px; }
  .logo { width: 44px; height: 44px; margin-bottom: 6px; }
  .brand { margin-bottom: 8px; }
  .brand h1 { font-size: 18px; margin-bottom: 2px; }
  .brand p { font-size: 12px; margin-bottom: 8px; }
  .card { padding: 14px; }
  .auth-tabs { margin-bottom: 12px; }
  .auth-tab { padding: 8px 0; }
  .row { margin-bottom: 9px; }
}
@keyframes t-in { from { opacity: 0; transform: translate(-50%, -10px);} to { opacity: 1; transform: translate(-50%, 0);} }