:root {
  --ink: #16302B;
  --sun: #FFC93C;
  --sun-deep: #E0A800;
  --coral: #FF6B4A;
  --coral-deep: #D94A2C;
  --moss: #F2F4EE;
  --moss-deep: #E4EAE1;
  --stone: #4A5D57;
  --cream: #FFF1C7;
  --white: #FFFFFF;
  --radius: 24px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--moss);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "HarmonyOS Sans SC", "MiSans", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
}
a { color: var(--ink); }
img { display: block; max-width: 100%; }

.page { max-width: 560px; margin: 0 auto; padding: 20px 16px 96px; }

/* ---------- 头图 ---------- */
.hero { position: relative; padding: 8px 4px 28px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 900; font-size: 20px; letter-spacing: .5px; }
.brand b { color: var(--coral); }
.pill {
  display: inline-block; margin: 22px 0 10px; padding: 4px 12px;
  background: var(--ink); color: var(--sun); border-radius: 999px; font-size: 13px; font-weight: 700;
}
h1 { margin: 0; font-size: 34px; line-height: 1.25; font-weight: 900; letter-spacing: .5px; }
h1 mark { background: linear-gradient(transparent 58%, var(--sun) 58%); color: inherit; padding: 0 2px; }
.lead { margin: 14px 0 0; max-width: 21em; color: var(--stone); font-size: 16px; }
.mascot { position: absolute; right: -4px; top: 56px; width: 96px; height: 96px; transform: rotate(8deg); }

/* 痛点 */
.pain { margin: 4px 0 14px; }
.pain-q { margin: 0; font-size: 22px; font-weight: 900; color: var(--coral-deep); }
.pain-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 0; }
.pain-tags s {
  text-decoration: line-through; text-decoration-color: var(--coral); text-decoration-thickness: 3px;
  padding: 4px 12px; border-radius: 999px; background: var(--moss-deep); color: var(--stone); font-weight: 700; font-size: 15px;
}

/* 报名按钮与锚点 */
.cta {
  display: inline-block; margin-top: 18px; padding: 13px 22px; border-radius: 999px;
  background: var(--ink); color: var(--sun); font-weight: 900; font-size: 17px; text-decoration: none;
}
.anchor-target { position: relative; top: -12px; }
#signup, #features, #pain { scroll-margin-top: 12px; }
.sticky-cta {
  position: fixed; left: 50%; bottom: calc(14px + env(safe-area-inset-bottom)); transform: translateX(-50%);
  width: min(528px, calc(100% - 32px)); padding: 15px; border-radius: 22px; text-align: center;
  background: var(--sun); color: var(--ink); font-weight: 900; font-size: 18px; text-decoration: none;
  box-shadow: 0 6px 0 var(--sun-deep), 0 10px 30px rgba(22, 48, 43, .18); z-index: 10;
}
.sticky-cta[hidden] { display: none; }

/* ---------- 三大特点 ---------- */
.features { display: grid; gap: 12px; margin-bottom: 20px; }
.features article {
  position: relative; padding: 16px 18px 16px 62px;
  background: var(--ink); color: var(--moss); border-radius: var(--radius);
}
.features article.coral { background: var(--coral); color: var(--ink); }
.features article.sun { background: var(--sun); color: var(--ink); }
.features .num {
  position: absolute; left: 16px; top: 16px; width: 32px; height: 32px; border-radius: 50%;
  display: grid; place-items: center; font-weight: 900; background: var(--sun); color: var(--ink);
}
.features article.coral .num, .features article.sun .num { background: var(--ink); color: var(--sun); }
.features h2 { margin: 2px 0 4px; font-size: 19px; font-weight: 900; }
.features p { margin: 0; font-size: 14px; opacity: .92; }

/* ---------- 表单 ---------- */
.card { background: var(--white); border-radius: 28px; padding: 22px 18px 24px; box-shadow: 0 10px 30px rgba(22, 48, 43, .06); }
.form-title { margin: 0; font-size: 24px; font-weight: 900; }
.form-title small { font-size: 13px; font-weight: 400; color: var(--stone); margin-left: 6px; }
.hint { margin: 4px 0 8px; color: var(--stone); font-size: 14px; }

fieldset, .field { border: 0; margin: 18px 0 0; padding: 0; min-width: 0; }
legend, .field > label { display: block; padding: 0; margin-bottom: 8px; font-weight: 800; font-size: 16px; }
legend i, .field > label i { color: var(--coral); font-style: normal; }
legend span { font-weight: 400; color: var(--stone); font-size: 13px; margin-left: 4px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { position: relative; }
.chip input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.chip span {
  display: inline-block; padding: 9px 14px; border-radius: 999px; font-size: 15px;
  background: var(--moss); border: 2px solid var(--moss-deep); transition: background .12s, border-color .12s;
}
.chip input:checked + span { background: var(--sun); border-color: var(--ink); font-weight: 700; }
.chip input:focus-visible + span { outline: 3px solid var(--coral); outline-offset: 2px; }
.chip input:disabled + span { opacity: .4; }

input[type="text"], input:not([type]), textarea {
  width: 100%; padding: 12px 14px; font: inherit; color: var(--ink);
  background: var(--moss); border: 2px solid var(--moss-deep); border-radius: 16px; outline: none;
}
input:focus, textarea:focus { border-color: var(--ink); background: var(--white); }
textarea { resize: vertical; }
.sub { margin: 8px 0 0; font-size: 13px; color: var(--stone); }

.trap { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.consent { display: flex; gap: 10px; align-items: flex-start; margin-top: 22px; font-size: 14px; color: var(--stone); }
.consent input { width: 20px; height: 20px; margin: 2px 0 0; accent-color: var(--ink); flex: none; }

.error { margin: 14px 0 0; padding: 10px 14px; border-radius: 14px; background: #FFE4DC; color: var(--coral-deep); font-size: 14px; font-weight: 700; }

.submit {
  display: block; width: 100%; margin-top: 18px; padding: 16px; font: inherit; font-size: 19px; font-weight: 900;
  color: var(--ink); background: var(--sun); border: 0; border-radius: 22px; cursor: pointer;
  box-shadow: 0 6px 0 var(--sun-deep); transition: transform .08s, box-shadow .08s;
}
.submit:active { transform: translateY(4px); box-shadow: 0 2px 0 var(--sun-deep); }
.submit:disabled { opacity: .6; cursor: default; }

/* ---------- 提交成功 ---------- */
.done { text-align: center; padding-top: 28px; }
.done img { margin: 0 auto; }
.done h2 { margin: 10px 0 4px; font-size: 24px; font-weight: 900; }
.done p { margin: 0; color: var(--stone); }
.qr { margin-top: 22px; padding: 18px; border-radius: 22px; background: var(--moss); }
.qr img { margin: 0 auto 10px; border-radius: 12px; background: var(--white); }
.qr p { font-size: 14px; }

.foot { margin-top: 26px; text-align: center; font-size: 13px; color: var(--stone); }
.foot p { margin: 2px 0; }
.icp, .icp a { color: var(--stone); font-size: 12px; text-decoration: none; }
.icp:empty { display: none; }

/* ---------- 隐私说明页 ---------- */
.doc h1 { font-size: 26px; margin: 18px 0 6px; }
.doc h2 { font-size: 18px; margin: 22px 0 6px; }
.doc p, .doc li { font-size: 15px; color: var(--ink); }
.doc .meta { color: var(--stone); font-size: 13px; }
.back { display: inline-block; margin-top: 12px; font-weight: 700; }

@media (max-width: 360px) {
  h1 { font-size: 29px; }
  .mascot { width: 84px; height: 84px; top: 70px; }
}