:root {
  --ink: #152824;
  --muted: #64726e;
  --green: #0f6a52;
  --green-dark: #123b36;
  --green-soft: #e6f3ed;
  --red: #bf3038;
  --red-soft: #fff0f0;
  --cream: #f7f5ee;
  --surface: #ffffff;
  --line: #dfe7e3;
  --shadow: 0 22px 60px rgba(19, 54, 47, .10);
  --radius-lg: 28px;
  --radius-md: 18px;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { min-width: 0; scroll-behavior: smooth; }
body {
  min-width: 0;
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--cream);
  font-size: 16px;
  line-height: 1.75;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
.wrap { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid rgba(18, 59, 54, .09);
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(15px);
}

.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 13px;
  color: #fff;
  background: linear-gradient(145deg, var(--green), var(--green-dark));
  font-size: 22px;
  font-weight: 900;
}

.brand strong, .brand small { display: block; }
.brand strong { line-height: 1.05; font-size: 17px; }
.brand small { margin-top: 3px; color: var(--muted); font-size: 10px; }
.home-link { padding: 9px 14px; border-radius: 999px; color: var(--green-dark); background: var(--green-soft); font-size: 13px; font-weight: 800; text-decoration: none; }

.hero {
  position: relative;
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(circle at 88% 12%, rgba(255, 255, 255, .12) 0, transparent 23rem),
    linear-gradient(135deg, #123b36, #0d5947 62%, #0c6b4e);
}

.hero::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -110px;
  width: 390px;
  height: 390px;
  border: 1px solid rgba(255, 255, 255, .10);
  border-radius: 50%;
  box-shadow: 0 0 0 56px rgba(255, 255, 255, .035), 0 0 0 112px rgba(255, 255, 255, .025);
}

.hero-grid {
  position: relative;
  z-index: 1;
  min-height: 590px;
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(300px, .7fr);
  gap: 72px;
  align-items: center;
  padding-top: 70px;
  padding-bottom: 70px;
}

.eyebrow, .section-kicker {
  margin: 0 0 10px;
  color: #92d8bd;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: .08em;
}

.hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(48px, 7vw, 76px);
  line-height: 1.08;
  letter-spacing: -.055em;
}

.hero-lead { max-width: 650px; margin: 24px 0 28px; color: rgba(255, 255, 255, .82); font-size: clamp(17px, 2vw, 20px); }
.primary-button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 24px;
  border-radius: 999px;
  color: var(--green-dark);
  background: #fff;
  box-shadow: 0 12px 30px rgba(0, 0, 0, .16);
  font-weight: 900;
  text-decoration: none;
  transition: transform .16s ease, box-shadow .16s ease;
}
.primary-button::after { content: "↗"; margin-left: 9px; font-size: 18px; }
.primary-button:hover { transform: translateY(-2px); box-shadow: 0 17px 38px rgba(0, 0, 0, .2); }
.button-note { margin: 10px 0 0; color: rgba(255, 255, 255, .62); font-size: 12px; }

.hero-panel {
  padding: 30px;
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, .10);
  box-shadow: 0 26px 60px rgba(0, 0, 0, .13);
  backdrop-filter: blur(14px);
}
.panel-label { display: inline-flex; padding: 5px 10px; border-radius: 999px; color: #d7f6e8; background: rgba(255, 255, 255, .1); font-size: 11px; font-weight: 850; }
.hero-panel strong { display: block; margin-top: 17px; font-size: 25px; line-height: 1.4; }
.hero-panel ul { list-style: none; margin: 22px 0 0; padding: 0; }
.hero-panel li { display: flex; align-items: center; gap: 9px; padding: 10px 0; border-top: 1px solid rgba(255, 255, 255, .11); color: rgba(255, 255, 255, .82); }
.hero-panel li span { color: #8ee0bd; font-weight: 900; }

.quick-guide { padding-top: 76px; padding-bottom: 80px; }
.section-kicker { color: var(--green); }
.quick-guide h2, .section-heading h2, .result-section h2, .final-cta h2 { margin: 0; font-size: clamp(32px, 4.6vw, 50px); line-height: 1.18; letter-spacing: -.035em; }
.quick-cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin-top: 28px; }
.quick-cards article { position: relative; padding: 27px 28px 27px 58px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); }
.quick-cards h3 { margin: 0; font-size: 20px; }
.quick-cards p { margin: 8px 0 0; color: var(--muted); }
.status-dot { position: absolute; top: 32px; left: 28px; width: 14px; height: 14px; border-radius: 50%; }
.status-dot.is-safe { background: #20a470; box-shadow: 0 0 0 7px #e2f6ed; }
.status-dot.is-alert { background: var(--red); box-shadow: 0 0 0 7px var(--red-soft); }

.tutorial-section { padding: 84px 0; background: #fff; }
.section-heading { max-width: 720px; margin: 0 auto 42px; text-align: center; }
.section-heading > p:last-child { margin: 12px 0 0; color: var(--muted); }
.section-heading.is-left { max-width: none; margin-right: 0; margin-left: 0; text-align: left; }

.step-card {
  display: grid;
  grid-template-columns: minmax(280px, .72fr) minmax(0, 1.28fr);
  gap: 44px;
  align-items: center;
  margin-top: 26px;
  padding: 38px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #fbfcfa;
  box-shadow: 0 12px 36px rgba(28, 56, 49, .055);
}
.step-card.is-reversed .step-copy { order: 2; }
.step-card.is-reversed figure { order: 1; }
.step-card.is-warning { border-color: #f0cfd2; background: #fffafa; }
.step-number { display: block; color: var(--green); font-size: 50px; font-weight: 950; line-height: 1; letter-spacing: -.06em; opacity: .16; }
.step-label { margin: 10px 0 2px; color: var(--green); font-size: 12px; font-weight: 900; letter-spacing: .08em; }
.step-copy h3 { margin: 0; font-size: clamp(25px, 3vw, 34px); line-height: 1.25; letter-spacing: -.025em; }
.step-copy p { color: var(--muted); }
.step-copy ul, .step-copy ol { padding-left: 22px; }
.step-copy li { margin: 7px 0; }
.tip { padding: 13px 15px; border-radius: 12px; color: var(--green-dark) !important; background: var(--green-soft); font-size: 14px; }
.step-copy blockquote { margin: 17px 0; padding: 16px 18px; border-left: 4px solid var(--green); border-radius: 0 10px 10px 0; color: var(--green-dark); background: var(--green-soft); font-weight: 900; }
.step-card figure { margin: 0; overflow: hidden; border: 1px solid #d8dfdc; border-radius: 18px; background: #fff; box-shadow: var(--shadow); }
.step-card figure img { width: 100%; }
.step-card figcaption { padding: 10px 14px; color: var(--muted); font-size: 12px; text-align: center; }

.result-section { padding-top: 84px; padding-bottom: 84px; }
.result-grid { display: grid; grid-template-columns: auto 1fr; gap: 24px; align-items: start; margin-top: 25px; padding: 30px; border-radius: var(--radius-lg); color: #fff; background: var(--green-dark); box-shadow: var(--shadow); }
.result-icon { width: 52px; height: 52px; display: grid; place-items: center; border-radius: 16px; color: var(--green-dark); background: #d9f2e7; font-size: 26px; font-weight: 950; }
.result-grid p { margin: 0 0 10px; color: rgba(255, 255, 255, .78); }
.result-grid p:last-child { margin-bottom: 0; }
.result-grid strong { color: #fff; }

.faq-section { padding: 82px 0; background: #eef3f0; }
.faq-wrap { display: grid; grid-template-columns: minmax(260px, .7fr) minmax(0, 1.3fr); gap: 70px; align-items: start; }
.faq-grid { display: grid; gap: 12px; }
.faq-grid details { padding: 0 20px; border: 1px solid var(--line); border-radius: 15px; background: #fff; }
.faq-grid summary { padding: 18px 0; cursor: pointer; font-weight: 850; }
.faq-grid p { margin: -4px 0 20px; color: var(--muted); }

.final-cta { display: flex; align-items: center; justify-content: space-between; gap: 42px; margin-top: 76px; margin-bottom: 76px; padding: 42px; border-radius: var(--radius-lg); color: #fff; background: linear-gradient(135deg, var(--red), #9d2730); box-shadow: 0 25px 60px rgba(144, 32, 39, .18); }
.final-cta .section-kicker { color: #ffd2d5; }
.final-cta h2 { max-width: 690px; font-size: clamp(30px, 4.2vw, 45px); }
.final-cta p:last-child { margin: 12px 0 0; color: rgba(255, 255, 255, .75); }
.primary-button.is-light { flex: 0 0 auto; color: #8b2028; }

.site-footer { padding: 34px 0; border-top: 1px solid var(--line); color: var(--muted); background: #fff; font-size: 13px; }
.footer-inner { display: flex; justify-content: space-between; gap: 28px; }
.footer-inner p { margin: 0; }
.footer-inner a { color: var(--green); font-weight: 800; text-decoration: none; }

:focus-visible { outline: 3px solid rgba(15, 106, 82, .35); outline-offset: 3px; }

@media (max-width: 920px) {
  .hero-grid { grid-template-columns: 1fr; gap: 35px; min-height: auto; }
  .hero-panel { max-width: 600px; }
  .step-card { grid-template-columns: 1fr; }
  .step-card.is-reversed .step-copy, .step-card.is-reversed figure { order: initial; }
  .faq-wrap { grid-template-columns: 1fr; gap: 28px; }
  .final-cta { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 760px) {
  .wrap { width: min(100% - 24px, 1120px); }
  .site-header { position: static; }
  .header-inner { min-height: 64px; }
  .brand small { display: none; }
  .home-link { padding: 8px 11px; }
  .hero-grid { padding-top: 48px; padding-bottom: 52px; }
  .hero h1 { font-size: 45px; }
  .hero-lead { margin-top: 18px; font-size: 17px; }
  .primary-button { width: 100%; }
  .hero-panel { padding: 23px; }
  .hero-panel strong { font-size: 21px; }
  .quick-guide { padding-top: 55px; padding-bottom: 58px; }
  .quick-cards { grid-template-columns: 1fr; }
  .tutorial-section { padding: 60px 0; }
  .section-heading { margin-bottom: 28px; text-align: left; }
  .step-card { gap: 23px; padding: 19px; border-radius: 20px; }
  .step-number { font-size: 42px; }
  .step-copy h3 { font-size: 27px; }
  .step-card figure { border-radius: 13px; }
  .result-section { padding-top: 58px; padding-bottom: 58px; }
  .result-grid { grid-template-columns: 1fr; padding: 23px; border-radius: 20px; }
  .faq-section { padding: 58px 0; }
  .final-cta { gap: 28px; margin-top: 55px; margin-bottom: 55px; padding: 26px 22px; border-radius: 20px; }
  .footer-inner { flex-direction: column; gap: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}