:root {
  --bg: #0f172a;
  --bg-soft: #1e293b;
  --card: #ffffff;
  --ink: #0f172a;
  --ink-soft: #64748b;
  --line: #e2e8f0;
  --primary: #4f46e5;
  --primary-2: #06b6d4;
  --danger: #dc2626;
  --ok: #16a34a;
  --radius: 14px;
  --shadow: 0 6px 24px rgba(15, 23, 42, 0.08);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
/* 确保 hidden 属性始终生效（避免被 .auth-view 等 display 规则覆盖） */
[hidden] { display: none !important; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #f1f5f9;
  color: var(--ink);
  min-height: 100vh;
}
#app { max-width: 820px; margin: 0 auto; padding-bottom: 40px; }

/* 顶部栏 */
.topbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px;
  background: linear-gradient(120deg, var(--primary), var(--primary-2));
  color: #fff;
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 18px; }
.logo { font-size: 22px; }
.topbar-right { display: flex; align-items: center; gap: 10px; }
.balance {
  background: rgba(255,255,255,0.2); padding: 6px 12px; border-radius: 999px;
  font-weight: 600; font-size: 14px;
}
.btn-ghost {
  background: rgba(255,255,255,0.18); color: #fff; border: none;
  padding: 6px 12px; border-radius: 999px; cursor: pointer; font-size: 14px;
  text-decoration: none; display: inline-block;
}
.btn-ghost:hover { background: rgba(255,255,255,0.3); }

.mock-banner {
  background: #fef3c7; color: #92400e; padding: 10px 16px; font-size: 13px;
  border-bottom: 1px solid #fde68a;
}

/* 登录 */
.auth-view { display: flex; justify-content: center; padding: 40px 18px; }
.auth-card {
  background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 28px 24px; width: 100%; max-width: 380px;
}
.auth-card h1 { margin: 0 0 4px; font-size: 24px; }
.auth-sub { margin: 0 0 20px; color: var(--ink-soft); font-size: 14px; }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; color: var(--ink-soft); margin-bottom: 6px; }
.field input, .redeem-row input, textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: 10px;
  font-size: 15px; outline: none; transition: border .15s; font-family: inherit;
}
.field input:focus, textarea:focus, .redeem-row input:focus { border-color: var(--primary); }
.auth-error, .gen-error { color: var(--danger); font-size: 13px; min-height: 18px; margin: 6px 0; }
.auth-switch { margin-top: 16px; font-size: 14px; color: var(--ink-soft); text-align: center; }
.auth-switch a { color: var(--primary); text-decoration: none; font-weight: 600; }
.auth-bonus { margin-top: 14px; font-size: 13px; color: var(--ok); text-align: center; }

.btn-primary {
  width: 100%; padding: 13px; border: none; border-radius: 10px; cursor: pointer;
  background: linear-gradient(120deg, var(--primary), var(--primary-2));
  color: #fff; font-size: 16px; font-weight: 600; transition: opacity .15s;
}
.btn-primary:hover { opacity: .92; }
.btn-primary:disabled { opacity: .5; cursor: not-allowed; }

/* Tabs */
.tabs {
  display: flex; gap: 4px; padding: 12px 12px 0; position: sticky; top: 56px;
  background: #f1f5f9; z-index: 10;
}
.tab {
  flex: 1; padding: 10px; border: none; background: transparent; cursor: pointer;
  font-size: 15px; color: var(--ink-soft); border-radius: 10px 10px 0 0; font-weight: 500;
}
.tab.active { color: var(--primary); background: #fff; font-weight: 700; }
.tab-panel { padding: 12px; }

.card {
  background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 18px; margin-bottom: 14px;
}
.card h2 { margin: 0 0 8px; font-size: 18px; }
.block-label { display: block; font-size: 13px; color: var(--ink-soft); margin: 14px 0 8px; font-weight: 600; }
.block-label:first-child { margin-top: 0; }
.muted { color: var(--ink-soft); font-size: 13px; }

/* 档位 */
.tier-grid { display: grid; grid-template-columns: 1fr; gap: 10px; }
.tier {
  border: 2px solid var(--line); border-radius: 12px; padding: 12px 14px; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center; transition: all .15s;
}
.tier.active { border-color: var(--primary); background: #eef2ff; }
.tier-info .tier-name { font-weight: 700; font-size: 15px; }
.tier-info .tier-desc { color: var(--ink-soft); font-size: 12px; margin-top: 2px; }
.tier-price { text-align: right; }
.tier-price .yuan { font-weight: 700; color: var(--primary); font-size: 17px; }
.tier-price .pts { color: var(--ink-soft); font-size: 12px; }

/* 画幅 */
.ratio-row { display: flex; flex-wrap: wrap; gap: 8px; }
.ratio-chip {
  border: 1.5px solid var(--line); border-radius: 999px; padding: 7px 16px; cursor: pointer;
  font-size: 14px; background: #fff;
}
.ratio-chip.active { border-color: var(--primary); background: #eef2ff; color: var(--primary); font-weight: 600; }

/* 生成栏 */
.gen-bar { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-top: 16px; }
.gen-cost { font-size: 14px; }
.gen-bar .btn-primary { width: auto; padding: 12px 26px; white-space: nowrap; }

/* 结果 */
.result-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; font-weight: 600; }
.result-head .btn-ghost { background: var(--primary); }
.result-img-wrap { text-align: center; }
.result-img-wrap img { max-width: 100%; border-radius: 10px; }

/* Loading */
.loading { text-align: center; padding: 30px; color: var(--ink-soft); }
.spinner {
  width: 40px; height: 40px; margin: 0 auto 14px; border: 4px solid var(--line);
  border-top-color: var(--primary); border-radius: 50%; animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* 充值 */
.redeem-row { display: flex; gap: 8px; margin: 12px 0 6px; }
.redeem-row .btn-primary { width: auto; padding: 12px 20px; white-space: nowrap; }
.redeem-msg { font-size: 14px; min-height: 20px; }
.redeem-msg.ok { color: var(--ok); }
.redeem-msg.err { color: var(--danger); }
.pkg-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 6px; }
.pkg {
  border: 1px solid var(--line); border-radius: 12px; padding: 14px; text-align: center;
}
.pkg .pkg-name { font-weight: 700; font-size: 15px; }
.pkg .pkg-yuan { color: var(--primary); font-size: 22px; font-weight: 800; margin: 6px 0; }
.pkg .pkg-pts { font-size: 13px; color: var(--ink-soft); }
.pkg .pkg-note { font-size: 12px; color: var(--ok); margin-top: 4px; }
.buy-box { margin-top: 14px; text-align: center; }
.btn-buy {
  display: inline-block; padding: 12px 28px; border-radius: 10px; text-decoration: none;
  background: linear-gradient(120deg, var(--primary), var(--primary-2)); color: #fff;
  font-size: 15px; font-weight: 600;
}
.btn-buy:hover { opacity: .92; }
.buy-tip { margin-top: 10px; font-size: 13px; color: var(--ink-soft); }

/* 列表 */
.seg { display: flex; gap: 8px; margin-bottom: 14px; }
.seg-btn {
  flex: 1; padding: 8px; border: 1px solid var(--line); background: #fff; border-radius: 8px;
  cursor: pointer; font-size: 14px; color: var(--ink-soft);
}
.seg-btn.active { border-color: var(--primary); color: var(--primary); font-weight: 600; background: #eef2ff; }
.list { display: flex; flex-direction: column; gap: 10px; }
.list-item {
  display: flex; gap: 12px; align-items: center; padding: 10px; border: 1px solid var(--line);
  border-radius: 10px;
}
.list-item img { width: 54px; height: 54px; object-fit: cover; border-radius: 8px; background: #f1f5f9; }
.list-item .li-main { flex: 1; min-width: 0; }
.list-item .li-title { font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.list-item .li-sub { font-size: 12px; color: var(--ink-soft); margin-top: 3px; }
.list-item .li-actions { margin-top: 8px; }
.list-item .thumb-link { display: inline-block; cursor: zoom-in; }
.dl-btn {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 12px; color: var(--ink-soft); text-decoration: none;
  border: 1px solid var(--line); border-radius: 999px;
  padding: 4px 12px; background: #fff; transition: all .15s ease;
}
.dl-btn:hover { color: var(--primary); border-color: var(--primary); background: #f5f5ff; }
.dl-btn svg { display: block; }

/* 参考图上传 */
.ref-upload { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.ref-add {
  border: 1px dashed var(--line); background: #fff; color: var(--ink-soft);
  border-radius: 10px; padding: 10px 14px; font-size: 13px; cursor: pointer;
}
.ref-add:hover { border-color: var(--primary); color: var(--primary); }
.ref-previews { display: flex; flex-wrap: wrap; gap: 8px; }
.ref-thumb { position: relative; width: 56px; height: 56px; }
.ref-thumb img { width: 56px; height: 56px; object-fit: cover; border-radius: 8px; border: 1px solid var(--line); }
.ref-del {
  position: absolute; top: -6px; right: -6px; width: 18px; height: 18px; line-height: 16px;
  text-align: center; background: #0f172a; color: #fff; border-radius: 999px; font-size: 12px; cursor: pointer;
}

/* 多图结果网格 */
.result-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
.result-cell { display: flex; flex-direction: column; gap: 6px; }
.result-cell img { width: 100%; border-radius: 10px; display: block; background: #f1f5f9; cursor: zoom-in; }
.result-cell .dl-btn { align-self: flex-start; }
.li-amount { font-weight: 700; font-size: 15px; }
.li-amount.plus { color: var(--ok); }
.li-amount.minus { color: var(--danger); }
.tag { font-size: 11px; padding: 2px 8px; border-radius: 999px; }
.tag.ok { background: #dcfce7; color: #166534; }
.tag.fail { background: #fee2e2; color: #991b1b; }
.empty { text-align: center; color: var(--ink-soft); padding: 24px; font-size: 14px; }

.notice-text {
  white-space: pre-wrap; font-family: inherit; font-size: 13px; line-height: 1.7;
  color: #334155; margin: 0;
}

/* Toast */
.toast {
  position: fixed; bottom: 30px; left: 50%; transform: translateX(-50%);
  background: rgba(15,23,42,0.92); color: #fff; padding: 12px 22px; border-radius: 999px;
  font-size: 14px; z-index: 100; max-width: 90%;
}

@media (max-width: 480px) {
  .gen-bar { flex-direction: column; align-items: stretch; }
  .gen-bar .btn-primary { width: 100%; }
  .pkg-grid { grid-template-columns: 1fr 1fr; }
}