:root {
  --bg: #061d13;
  --header: #04170f;
  --panel: #0a281b;
  --panel-2: #0d3121;
  --line: #145333;
  --line-strong: #1b7045;
  --text: #eef9f2;
  --muted: #85a896;
  --green: #48df85;
  --green-dark: #0b5a35;
  --blue: #4fa7ff;
  --yellow: #f3d51d;
  --purple: #c77dff;
  --danger: #ff7585;
}

[hidden] { display: none !important; }
* { box-sizing: border-box; }
html { min-width: 320px; background: var(--bg); }
body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  font-size: 14px;
  letter-spacing: 0;
}
button, input, a { font: inherit; letter-spacing: 0; }
a { color: inherit; }
button { cursor: pointer; }
svg { width: 18px; height: 18px; stroke-width: 1.8; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  height: 64px;
  border-bottom: 1px solid #0e3c27;
  background: var(--header);
}
.header-inner {
  display: flex;
  width: min(1120px, calc(100% - 40px));
  height: 100%;
  margin: 0 auto;
  align-items: center;
  gap: 34px;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand strong { font-size: 18px; }
.brand-mark {
  display: inline-grid;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 8px;
  background: var(--green);
  color: #042216;
}
.site-header nav { display: flex; align-items: center; gap: 8px; }
.site-header nav a {
  min-width: 64px;
  padding: 9px 15px;
  border-radius: 7px;
  color: var(--muted);
  text-align: center;
  text-decoration: none;
}
.site-header nav a:hover, .site-header nav a.active { background: #0a2d1d; color: var(--green); }
.account-tools { display: flex; margin-left: auto; align-items: center; gap: 12px; }
.balance-pill {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  gap: 7px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--green);
}
.avatar { display: grid; width: 36px; height: 36px; place-items: center; border-radius: 50%; background: var(--green); color: #052116; font-weight: 800; }

.page { width: min(1120px, calc(100% - 40px)); margin: 0 auto; padding: 32px 0 56px; }
.page-heading, .section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; }
.page-heading { margin-bottom: 28px; }
.eyebrow { display: block; margin-bottom: 5px; color: var(--green); font-size: 12px; font-weight: 700; }
h1, h2, p { margin: 0; }
h1 { font-size: 30px; line-height: 1.2; }
h2 { font-size: 19px; }
.page-heading p, .section-heading p, .redeem-copy p { margin-top: 7px; color: var(--muted); }
.page-heading p strong { color: var(--green); font-size: 20px; }
.account-summary {
  display: flex;
  min-width: 260px;
  align-items: center;
  gap: 12px;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}
.account-summary > svg { color: var(--green); }
.account-summary span, .account-summary small, .account-summary strong { display: block; min-width: 0; }
.account-summary small { margin-bottom: 3px; color: var(--muted); }
.account-summary strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.secure-note { display: inline-flex; align-items: center; gap: 7px; color: var(--muted); }
.secure-note svg { color: var(--green); }

.package-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 16px; }
.package-card {
  display: flex;
  min-height: 210px;
  padding: 22px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}
.package-card:hover { border-color: var(--line-strong); transform: translateY(-2px); }
.package-card.selected { border-width: 2px; background: #102b21; }
.package-label { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); font-size: 15px; }
.package-card > strong { margin-top: 14px; font-size: 38px; line-height: 1; }
.package-card > strong small { margin-left: 4px; color: var(--muted); font-size: 14px; font-weight: 400; }
.package-price { margin-top: 15px; color: var(--green); font-size: 20px; font-weight: 800; }
.package-card > small { margin-top: 12px; color: var(--muted); }
.tone-starter .package-label svg { color: var(--blue); }
.tone-popular .package-label svg { color: var(--yellow); }
.tone-pro .package-label svg { color: var(--purple); }
.tone-starter.selected { border-color: var(--blue); }
.tone-popular.selected { border-color: var(--yellow); }
.tone-pro.selected { border-color: var(--purple); }
.checkout-row { display: flex; justify-content: center; margin: 20px 0 30px; }
.primary-action, .redeem-button {
  display: inline-flex;
  min-height: 48px;
  padding: 0 24px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border: 0;
  border-radius: 8px;
  background: var(--green);
  color: #042116;
  font-weight: 800;
  text-decoration: none;
}
.primary-action.disabled { cursor: not-allowed; background: #275b40; color: #9bb8a7; }

.redeem-band {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.75fr);
  gap: 32px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}
.flow-status { display: flex; margin-top: 22px; align-items: center; gap: 10px; color: var(--muted); }
.flow-status span { display: inline-flex; align-items: center; gap: 7px; }
.flow-status b { display: grid; width: 24px; height: 24px; place-items: center; border: 1px solid var(--line-strong); border-radius: 50%; color: var(--green); }
.flow-status > svg { width: 15px; color: #3f6e55; }
.redeem-form { display: grid; align-content: center; gap: 10px; }
.redeem-form label { color: var(--muted); font-size: 12px; font-weight: 700; }
.code-input { position: relative; display: flex; align-items: center; }
.code-input > svg { position: absolute; left: 13px; z-index: 1; color: #537063; }
.code-input input {
  width: 100%;
  height: 44px;
  min-width: 0;
  padding: 0 13px 0 42px;
  border: 1px solid #b9c9c0;
  border-radius: 7px;
  outline: 0;
  background: #f7faf8;
  color: #173126;
}
.code-input input:focus { border-color: var(--green); box-shadow: 0 0 0 3px rgba(72, 223, 133, 0.16); }
.redeem-button { width: 100%; cursor: pointer; }
.redeem-button:disabled { cursor: wait; opacity: 0.6; }
.refresh-button { display: inline-flex; min-height: 36px; align-items: center; justify-content: center; gap: 7px; border: 1px solid var(--line); border-radius: 7px; background: transparent; color: var(--muted); }
.refresh-button:hover { border-color: var(--line-strong); color: var(--text); }

.auth-gate { min-height: calc(100vh - 64px); display: grid; place-items: center; padding: 24px; }
.auth-panel { width: min(420px, 100%); padding: 32px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); text-align: center; }
.auth-panel .brand-mark { margin: 0 auto 18px; }
.auth-panel h1 { font-size: 24px; }
.auth-panel p { margin: 10px 0 22px; color: var(--muted); }
.toast-stack { position: fixed; right: 18px; bottom: 18px; z-index: 60; display: grid; width: min(360px, calc(100vw - 36px)); gap: 9px; }
.toast { display: flex; gap: 10px; padding: 13px 15px; border: 1px solid var(--line-strong); border-radius: 8px; background: #0c3321; box-shadow: 0 12px 28px rgba(0,0,0,.28); }
.toast svg { flex: 0 0 auto; color: var(--green); }
.toast.error svg { color: var(--danger); }
.toast strong, .toast span { display: block; }
.toast span { margin-top: 3px; color: var(--muted); font-size: 12px; }

@media (max-width: 760px) {
  .header-inner, .page { width: min(100% - 24px, 1120px); }
  .header-inner { gap: 14px; }
  .brand strong { display: none; }
  .site-header nav { gap: 2px; }
  .site-header nav a { min-width: 54px; padding-inline: 10px; }
  .balance-pill { padding: 0 10px; }
  .page { padding-top: 22px; }
  .page-heading { align-items: stretch; flex-direction: column; }
  .account-summary { min-width: 0; }
  .section-heading { align-items: flex-start; }
  .secure-note { font-size: 12px; }
  .package-grid { grid-template-columns: 1fr; }
  .package-card { min-height: 160px; }
  .redeem-band { grid-template-columns: 1fr; padding: 20px; }
  .flow-status { align-items: flex-start; flex-direction: column; }
  .flow-status > svg { display: none; }
}

@media (max-width: 390px) {
  .account-tools .avatar { display: none; }
  .package-card > strong { font-size: 34px; }
  .code-input input { font-size: 12px; }
}