:root {
  --ink: #17201a;
  --muted: #68736d;
  --paper: #f7f4ec;
  --line: #ded8ca;
  --green: #1f5d48;
  --gold: #b78236;
  --white: #fffdf8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "Songti SC", "Noto Serif SC", serif;
  background:
    linear-gradient(120deg, rgba(31, 93, 72, .12), transparent 34%),
    radial-gradient(circle at 80% 8%, rgba(183, 130, 54, .16), transparent 32%),
    var(--paper);
}

button,
input,
textarea {
  font: inherit;
}

button {
  border: 0;
  border-radius: 6px;
  padding: 12px 18px;
  color: var(--white);
  background: var(--green);
  cursor: pointer;
}

button:disabled {
  opacity: .55;
  cursor: not-allowed;
}

.ghost {
  color: var(--green);
  background: transparent;
  border: 1px solid var(--green);
}

.shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0;
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: flex-end;
  padding: 38px 0 26px;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--gold);
  font: 700 12px/1.2 Georgia, serif;
  letter-spacing: 0;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 10px;
  font-size: clamp(46px, 7vw, 82px);
  line-height: 1;
}

h2 {
  font-size: 22px;
}

.lead {
  margin-bottom: 0;
  color: var(--muted);
}

.userbar {
  display: flex;
  gap: 12px;
  align-items: center;
  color: var(--muted);
}

.auth-grid,
.workspace {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.workspace {
  grid-template-columns: 300px minmax(0, 1fr);
  align-items: start;
}

.auth-grid {
  grid-template-columns: minmax(280px, 420px);
  justify-content: center;
}

.panel,
.side {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 253, 248, .82);
  box-shadow: 0 20px 60px rgba(23, 32, 26, .08);
}

label {
  display: block;
  margin: 14px 0;
  color: var(--muted);
}

input,
textarea {
  width: 100%;
  margin-top: 8px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px;
  color: var(--ink);
  background: var(--white);
  outline-color: var(--green);
}

.hidden {
  display: none !important;
}

.score {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.score strong {
  font-size: 34px;
  color: var(--gold);
}

.score small {
  display: block;
  margin-top: 6px;
  color: var(--muted);
}

.pay-list {
  display: grid;
  gap: 10px;
}

.wx-login {
  text-align: center;
}

.login-qr {
  display: grid;
  place-items: center;
  min-height: 244px;
  margin: 18px auto 12px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.login-qr img,
.login-qr canvas {
  width: 220px;
  height: 220px;
}

.login-status {
  color: var(--muted);
}

.pay-item {
  display: grid;
  width: 100%;
  gap: 4px;
  text-align: left;
  padding: 12px;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--white);
}

.pay-item:hover {
  border-color: var(--gold);
}

.pay-item strong {
  display: block;
}

.pay-item span {
  color: var(--muted);
}

.pay-item small {
  color: var(--gold);
}

.chat {
  min-height: 650px;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.chat-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
}

.tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tab {
  padding: 8px 12px;
  color: var(--green);
  background: transparent;
  border: 1px solid var(--line);
}

.tab.active {
  color: var(--white);
  background: var(--green);
  border-color: var(--green);
}

.feature-quote {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.messages {
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 18px 0;
}

.message {
  max-width: 82%;
  white-space: pre-wrap;
  padding: 12px 14px;
  border-radius: 8px;
  background: var(--white);
  border: 1px solid var(--line);
}

.message.user {
  align-self: flex-end;
  color: var(--white);
  background: var(--green);
}

.composer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
}

.composer textarea {
  min-height: 80px;
  resize: vertical;
}

.contact-service {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
  margin-top: 24px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 253, 248, .82);
  box-shadow: 0 20px 60px rgba(23, 32, 26, .08);
}

.contact-service p {
  margin-bottom: 0;
  color: var(--muted);
}

.contact-service img {
  width: 150px;
  height: 150px;
  object-fit: contain;
  border-radius: 6px;
  background: #fff;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  max-width: min(520px, calc(100vw - 24px));
  padding: 12px 18px;
  color: var(--white);
  border-radius: 6px;
  background: rgba(23, 32, 26, .9);
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(23, 32, 26, .46);
}

.modal-panel {
  position: relative;
  width: min(360px, 100%);
  padding: 24px;
  text-align: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 24px 80px rgba(23, 32, 26, .22);
}

.modal-close {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 34px;
  height: 34px;
  padding: 0;
  color: var(--muted);
  background: transparent;
}

.pay-summary,
.pay-status {
  color: var(--muted);
}

.qr-code {
  display: grid;
  place-items: center;
  min-height: 244px;
  margin: 18px 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.qr-code img,
.qr-code canvas {
  width: 220px;
  height: 220px;
}

.qr-code a {
  color: var(--green);
}

@media (max-width: 780px) {
  .hero,
  .chat-head,
  .composer {
    display: block;
  }

  .auth-grid,
  .workspace {
    grid-template-columns: 1fr;
  }

  .tabs {
    margin-top: 12px;
    overflow-x: auto;
  }

  .composer button {
    width: 100%;
    margin-top: 10px;
  }

  .message {
    max-width: 100%;
  }

  .contact-service {
    display: grid;
    justify-items: center;
    text-align: center;
  }
}