:root {
  color-scheme: light;
  --green: #16a56a;
  --green-dark: #087a4b;
  --ink: #17352a;
  --muted: #64776f;
  --line: #d9e9e1;
  --paper: rgba(255, 255, 255, 0.92);
  font-family: "Microsoft YaHei UI", "PingFang SC", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 14% 15%, rgba(71, 205, 143, 0.22), transparent 31rem),
    radial-gradient(circle at 85% 80%, rgba(254, 211, 118, 0.2), transparent 28rem),
    linear-gradient(145deg, #f5fcf8 0%, #eef8f3 52%, #fbf8ee 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.32;
  background-image: radial-gradient(#79b79b 0.75px, transparent 0.75px);
  background-size: 22px 22px;
  mask-image: linear-gradient(to bottom, black, transparent 78%);
}

.page-shell {
  width: min(1040px, calc(100% - 40px));
  min-height: calc(100vh - 58px);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.06fr 0.94fr;
  align-items: center;
  gap: clamp(42px, 7vw, 92px);
  padding: 64px 0 36px;
}

.intro {
  padding-left: 8px;
}

.brand-mark {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  margin-bottom: 26px;
  border-radius: 18px;
  background: linear-gradient(145deg, #29c986, #079358);
  box-shadow: 0 14px 28px rgba(8, 143, 84, 0.22);
}

.brand-mark svg {
  width: 37px;
  fill: white;
}

.eyebrow {
  margin: 0 0 13px;
  color: var(--green-dark);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0;
}

h1 {
  max-width: 520px;
  margin: 0;
  font-size: clamp(38px, 5vw, 62px);
  line-height: 1.12;
  letter-spacing: 0;
}

.subtitle {
  margin: 23px 0 30px;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.8;
}

.benefits {
  display: grid;
  gap: 15px;
  margin: 0 0 31px;
  padding: 0;
  list-style: none;
}

.benefits li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 16px;
  font-weight: 650;
}

.benefits li::before {
  content: "";
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  border: 5px solid rgba(22, 165, 106, 0.16);
  border-radius: 50%;
  background: var(--green);
  background-clip: padding-box;
}

.privacy-note {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  color: #74867e;
  font-size: 13px;
}

.privacy-note span {
  color: var(--green);
  font-weight: 900;
}

.join-card {
  position: relative;
  padding: 30px 34px 31px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 30px;
  background: var(--paper);
  box-shadow: 0 26px 70px rgba(31, 89, 64, 0.14), 0 2px 8px rgba(31, 89, 64, 0.06);
  backdrop-filter: blur(18px);
}

.card-heading {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  padding: 7px 13px;
  color: var(--green-dark);
  border-radius: 999px;
  background: #ebfaf2;
  font-size: 12px;
  font-weight: 750;
}

.live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 5px rgba(22, 165, 106, 0.12);
}

h2 {
  margin: 0;
  font-size: 25px;
  letter-spacing: 0;
}

.card-help {
  margin: 10px 0 21px;
  color: var(--muted);
  font-size: 14px;
}

.mobile-help {
  display: none;
}

.qr-frame {
  position: relative;
  display: block;
  width: min(100%, 292px);
  aspect-ratio: 1;
  margin: 0 auto;
  padding: 16px;
  border: 0;
  border-radius: 22px;
  background: white;
  box-shadow: inset 0 0 0 1px #e7eee9, 0 12px 30px rgba(44, 92, 70, 0.09);
  cursor: zoom-in;
}

.qr-frame:focus-visible,
.save-button:focus-visible,
.dialog-close:focus-visible {
  outline: 3px solid rgba(22, 165, 106, 0.25);
  outline-offset: 3px;
}

.qr-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.corner {
  position: absolute;
  width: 24px;
  height: 24px;
  border-color: var(--green);
  border-style: solid;
}

.corner-tl {
  top: 7px;
  left: 7px;
  border-width: 3px 0 0 3px;
  border-radius: 8px 0 0;
}

.corner-tr {
  top: 7px;
  right: 7px;
  border-width: 3px 3px 0 0;
  border-radius: 0 8px 0 0;
}

.corner-bl {
  bottom: 7px;
  left: 7px;
  border-width: 0 0 3px 3px;
  border-radius: 0 0 0 8px;
}

.corner-br {
  right: 7px;
  bottom: 7px;
  border-width: 0 3px 3px 0;
  border-radius: 0 0 8px;
}

.qr-status {
  margin: 18px 0 13px;
  color: #84948d;
  font-size: 12px;
}

.save-button {
  display: none;
  padding: 12px 20px;
  color: white;
  border: 0;
  border-radius: 13px;
  background: var(--green);
  cursor: pointer;
  font-weight: 750;
  text-decoration: none;
}

.support {
  margin: 16px 0 0;
  color: #9aa8a1;
  font-size: 12px;
}

footer {
  height: 58px;
  color: #8a9a92;
  text-align: center;
  font-size: 12px;
}

.qr-dialog {
  width: min(90vw, 460px);
  padding: 28px;
  text-align: center;
  border: 0;
  border-radius: 24px;
  box-shadow: 0 24px 80px rgba(9, 49, 31, 0.3);
}

.qr-dialog::backdrop {
  background: rgba(4, 29, 18, 0.7);
  backdrop-filter: blur(5px);
}

.qr-dialog p {
  margin: 0 0 18px;
  font-weight: 750;
}

.qr-dialog img {
  width: 100%;
  border-radius: 12px;
}

.dialog-close {
  position: absolute;
  top: 8px;
  right: 12px;
  border: 0;
  background: transparent;
  color: #718078;
  font-size: 28px;
  cursor: pointer;
}

@media (max-width: 760px) {
  .page-shell {
    width: min(100% - 28px, 480px);
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 30px;
    padding: 36px 0 24px;
  }

  .intro {
    padding: 0 6px;
    text-align: center;
  }

  .brand-mark {
    width: 51px;
    height: 51px;
    margin: 0 auto 19px;
    border-radius: 16px;
  }

  .eyebrow {
    margin-bottom: 9px;
  }

  h1 {
    font-size: clamp(33px, 10vw, 45px);
  }

  .subtitle {
    margin: 15px 0 22px;
    font-size: 16px;
  }

  .benefits {
    width: fit-content;
    margin: 0 auto 23px;
    text-align: left;
  }

  .privacy-note {
    font-size: 12px;
  }

  .join-card {
    padding: 26px 20px 27px;
    border-radius: 25px;
  }

  h2 {
    font-size: 23px;
  }

  .desktop-help {
    display: none;
  }

  .mobile-help {
    display: block;
  }

  .qr-frame {
    width: min(100%, 315px);
  }

  .save-button {
    display: inline-block;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .join-card {
    animation: rise 560ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
  }

  .intro {
    animation: rise 480ms 80ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
  }

  @keyframes rise {
    from {
      opacity: 0;
      transform: translateY(14px);
    }
  }
}