:root {
  --accent: #0B6B57;
  --accent-dark: #084C3E;
  --accent-soft: #DFF1EC;
  --ink: #13202F;
  --body: #3A4656;
  --muted: #566273;
  --line: #E1E6EC;
  --tint: #F4F7F6;
  --soft: #F7F8FA;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: #ffffff;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

h1, h2, h3, p, ul { margin: 0; }
a { color: var(--accent); }
a:hover { color: var(--accent-dark); }
img { max-width: 100%; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.wrap.narrow { max-width: 820px; }

.section { padding: 88px 0; }
.section.tint { background: var(--tint); }
.section.dark { background: var(--ink); color: #ffffff; padding: 80px 0; }

.stack-sm { display: flex; flex-direction: column; gap: 16px; }
.stack-md { display: flex; flex-direction: column; gap: 32px; }
.stack-lg { display: flex; flex-direction: column; gap: 40px; }

h1 { font-size: 48px; line-height: 1.25; font-weight: 800; letter-spacing: -0.5px; }
h2 { font-size: 34px; line-height: 1.3; font-weight: 800; }
h3 { font-size: 19px; font-weight: 700; }

.intro { display: flex; flex-direction: column; gap: 12px; max-width: 760px; }
.lead { font-size: 19px; color: var(--body); }
.sub { font-size: 17px; color: var(--body); }
.sub.on-dark { color: #C7D0DB; }
.muted { color: var(--body); font-size: 15px; }
.small { font-size: 14px; }
.tiny { font-size: 13px; color: var(--muted); }
.fine { font-size: 14px; color: var(--muted); }
.strong { font-weight: 700; font-size: 17px; }

/* Header */
.site-header { border-bottom: 1px solid #E6E9EE; background: #ffffff; position: sticky; top: 0; z-index: 10; }
.header-row { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; padding-top: 14px; padding-bottom: 14px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand:hover { color: var(--ink); }
.brand-mark { width: 36px; height: 36px; border-radius: 10px; background: var(--accent); display: flex; align-items: center; justify-content: center; }
.brand-name { font-size: 20px; font-weight: 700; }
.nav { display: flex; flex-wrap: wrap; align-items: center; gap: 24px; font-size: 15px; }
.nav a:not(.btn) { color: var(--body); text-decoration: none; }
.nav a:not(.btn):hover { color: var(--ink); }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; text-align: center; text-decoration: none; border-radius: 10px; font-weight: 700; font-size: 16px; padding: 12px 22px; min-height: 44px; cursor: pointer; border: 1px solid transparent; font-family: inherit; }
.btn-primary { background: var(--accent); color: #ffffff; }
.btn-primary:hover { background: var(--accent-dark); color: #ffffff; }
.btn-primary:disabled { opacity: 0.6; cursor: wait; }
.btn-outline { background: #ffffff; color: var(--ink); border-color: #C9D1DB; }
.btn-outline:hover { border-color: var(--ink); color: var(--ink); }
.btn-lg { font-size: 17px; padding: 14px 26px; }
.btn-sm { font-size: 15px; padding: 8px 18px; border-radius: 8px; }

/* Hero */
.hero { display: flex; flex-wrap: wrap; align-items: center; gap: 56px; padding-top: 0; }
#top.section { padding: 80px 0; }
.hero-copy { flex: 1 1 440px; min-width: 0; display: flex; flex-direction: column; gap: 24px; }
.pill { display: inline-flex; align-self: flex-start; font-size: 14px; font-weight: 600; color: var(--accent); background: var(--accent-soft); padding: 6px 12px; border-radius: 999px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* Cards */
.cards { display: flex; flex-wrap: wrap; gap: 20px; }
.card { flex: 1 1 280px; min-width: 0; background: #ffffff; border: 1px solid var(--line); border-radius: 14px; padding: 28px; display: flex; flex-direction: column; gap: 12px; }
.card.soft { background: var(--soft); border-color: transparent; }
.step { font-size: 15px; font-weight: 700; color: var(--accent); }

.report-card { flex: 1 1 420px; border-radius: 16px; box-shadow: 0 12px 32px rgba(19, 32, 47, 0.08); gap: 18px; }
.report-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.report-title { font-size: 18px; font-weight: 700; }
.tag { font-size: 12px; color: var(--muted); background: #F1F3F6; padding: 4px 10px; border-radius: 999px; white-space: nowrap; }
.todo { display: flex; gap: 14px; align-items: flex-start; padding-bottom: 16px; border-bottom: 1px solid #EEF1F4; }
.todo.last { padding-bottom: 0; border-bottom: none; }
.todo > div { display: flex; flex-direction: column; gap: 4px; }
.todo-title { font-weight: 600; }
.num { flex: none; width: 28px; height: 28px; border-radius: 50%; background: var(--accent); color: #ffffff; font-weight: 700; font-size: 14px; display: flex; align-items: center; justify-content: center; }
.gain { color: var(--accent); font-weight: 700; font-size: 15px; }
.gain.small { font-size: 14px; }

/* Sample */
.sample { border: 1px solid var(--line); border-radius: 16px; overflow: hidden; }
.sample-head { background: var(--soft); padding: 20px 28px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; border-bottom: 1px solid var(--line); }
.sample-body { padding: 28px; display: flex; flex-direction: column; gap: 20px; }
.two-col { display: flex; flex-wrap: wrap; gap: 20px; }
.two-col > div { flex: 1 1 300px; min-width: 0; display: flex; flex-direction: column; gap: 8px; }
.label { font-size: 14px; font-weight: 700; color: var(--body); }
.label.warn { color: #8A3B12; }
.label.ok { color: var(--accent); }
.code { font-size: 17px; border-radius: 10px; padding: 14px 16px; font-family: Menlo, Consolas, monospace; word-break: break-word; }
.code.before { background: #FDF1EA; }
.code.after { background: #E8F5F1; }

/* Split sections */
.split { display: flex; flex-wrap: wrap; gap: 40px; align-items: flex-start; }
.split-left { flex: 1 1 380px; min-width: 0; display: flex; flex-direction: column; gap: 12px; }
.checks { flex: 1 1 520px; min-width: 0; list-style: none; padding: 0; display: flex; flex-direction: column; gap: 16px; font-size: 17px; }
.checks li { position: relative; padding-left: 38px; }
.checks li::before { content: ""; position: absolute; left: 4px; top: 6px; width: 16px; height: 9px; border-left: 2.5px solid #7FD8C1; border-bottom: 2.5px solid #7FD8C1; transform: rotate(-45deg); }

/* Pricing */
.plan { flex: 1 1 300px; padding: 32px; gap: 20px; border-radius: 16px; }
.plan.featured { border: 2px solid var(--accent); padding: 31px; box-shadow: 0 12px 32px rgba(19, 32, 47, 0.08); }
.plan-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.badge { font-size: 13px; font-weight: 700; color: #ffffff; background: var(--accent); padding: 4px 10px; border-radius: 999px; }
.price { font-size: 40px; font-weight: 800; line-height: 1.1; }
.price span { font-size: 16px; font-weight: 500; color: var(--muted); }
.features { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 10px; font-size: 15px; flex-grow: 1; }
.features li { padding-left: 22px; position: relative; }
.features li::before { content: ""; position: absolute; left: 2px; top: 7px; width: 10px; height: 5px; border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(-45deg); }

/* Signup */
.qr-box { display: flex; gap: 16px; align-items: center; background: #ffffff; border: 1px solid var(--line); border-radius: 14px; padding: 16px; }
.qr { flex: none; width: 104px; height: 104px; border-radius: 8px; object-fit: contain; background: var(--soft); }
.form { flex: 1 1 440px; padding: 32px; gap: 18px; border-radius: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 15px; font-weight: 600; }
.field input[type="url"], .field input[type="text"], .field select { font-size: 16px; padding: 12px 14px; border: 1px solid #A9B4C1; border-radius: 8px; background: #ffffff; min-height: 48px; font-family: inherit; color: var(--ink); width: 100%; }
.field input:focus, .field select:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
.field.check { flex-direction: row; align-items: center; gap: 10px; }
.field.check input { width: 20px; height: 20px; margin: 0; flex: none; accent-color: var(--accent); }
.field.check label { font-weight: 400; font-size: 14px; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.status { font-size: 15px; font-weight: 600; min-height: 1em; }
.status.ok { color: var(--accent); }
.status.err { color: #B42318; }

/* FAQ */
.faq { display: flex; flex-direction: column; gap: 6px; padding-bottom: 20px; border-bottom: 1px solid #E6E9EE; }
.faq.last { border-bottom: none; padding-bottom: 0; }
.faq h3 { font-size: 18px; }
.faq .muted { font-size: 16px; }

/* Footer */
.site-footer { background: var(--ink); color: #C7D0DB; }
.site-footer a { color: #C7D0DB; }
.site-footer a:hover { color: #ffffff; }
.footer-row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; padding-top: 32px; padding-bottom: 32px; font-size: 14px; }

/* Privacy page */
.doc { padding: 56px 0 88px; }
.doc h1 { font-size: 32px; margin-bottom: 8px; }
.doc h2 { font-size: 22px; margin: 32px 0 10px; }
.doc p, .doc li { color: var(--body); font-size: 16px; }
.doc ul { padding-left: 22px; display: flex; flex-direction: column; gap: 6px; }
.doc p + p { margin-top: 10px; }

/* Phone */
@media (max-width: 640px) {
  .section { padding: 56px 0; }
  #top.section { padding: 48px 0; }
  h1 { font-size: 32px; }
  h2 { font-size: 26px; }
  .lead { font-size: 17px; }
  .hero { gap: 32px; }
  .nav { gap: 14px; font-size: 14px; }
  .nav a[href="#how"], .nav a[href="#faq"] { display: none; }
  .card, .plan, .form { padding: 22px; }
  .plan.featured { padding: 21px; }
  .sample-head, .sample-body { padding: 18px; }
  .wrap { padding: 0 16px; }
}

.fast-path { flex: none; gap: 8px; }
.fast-path .btn { align-self: flex-start; }