:root {
  --ink: #1f2523;
  --quiet-green: #486b5a;
  --mist-green: #dde8e1;
  --rice-paper: #f7f3ea;
  --warm-paper: #fffdf7;
  --clay-beige: #d8c7aa;
  --muted-gold: #b99555;
  --soft-red: #b86b62;
  --fog-gray: #8b928c;
  --secondary: #6f766f;
  --pale-gray: #ecebe5;
  --line: #e4ded2;
  --font-display: "LXGW WenKai Screen", "Noto Serif SC", "Source Han Serif SC", "PingFang SC", "Microsoft YaHei", serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --max: 1680px;
  --page-pad: clamp(32px, 7vw, 128px);
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-pill: 999px;
  --shadow-soft: 0 12px 32px rgba(31, 37, 35, 0.06);
  --shadow-card: 0 8px 20px rgba(31, 37, 35, 0.045);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  color: var(--ink);
  font-family: var(--font-body);
  background:
    radial-gradient(circle at 40% 20%, rgba(221, 232, 225, 0.45), transparent 28rem),
    radial-gradient(circle at 80% 10%, rgba(216, 199, 170, 0.22), transparent 24rem),
    linear-gradient(rgba(31, 37, 35, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31, 37, 35, 0.025) 1px, transparent 1px),
    var(--rice-paper);
  background-size: auto, auto, 24px 24px, 24px 24px, auto;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea {
  font: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px var(--page-pad);
  background: rgba(247, 243, 234, 0.84);
  border-bottom: 1px solid rgba(31, 37, 35, 0.08);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark,
.icon {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 14px;
  color: var(--quiet-green);
  background: var(--mist-green);
  border: 1px solid rgba(72, 107, 90, 0.18);
  font-family: var(--font-display);
  font-weight: 700;
}

.brand strong,
.phone-head strong {
  display: block;
  font-family: var(--font-display);
  font-size: 20px;
}

.brand small {
  display: block;
  margin-top: 2px;
  color: var(--fog-gray);
  font-size: 13px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 34px;
  color: var(--secondary);
  font-size: 14px;
}

.site-nav a:hover,
.site-footer a:hover {
  color: var(--quiet-green);
}

.nav-cta {
  padding: 12px 20px;
  border: 1px solid rgba(72, 107, 90, 0.28);
  border-radius: var(--radius-pill);
  color: var(--quiet-green);
  font-weight: 700;
}

.section-shell {
  width: 100%;
  max-width: none;
  margin: 0;
  padding: clamp(88px, 9vw, 150px) var(--page-pad);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(460px, 0.88fr);
  align-items: center;
  gap: clamp(56px, 7vw, 132px);
  min-height: calc(100vh - 74px);
  padding-top: clamp(72px, 8vh, 128px);
  padding-bottom: clamp(72px, 8vh, 128px);
}

.eyebrow,
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--quiet-green);
  font-size: 14px;
  font-weight: 700;
}

.eyebrow {
  padding: 8px 14px;
  background: var(--mist-green);
  border: 1px solid rgba(72, 107, 90, 0.2);
  border-radius: var(--radius-pill);
}

.eyebrow span,
.section-kicker::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--quiet-green);
}

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--font-display);
  letter-spacing: -0.04em;
}

h1 {
  max-width: 980px;
  margin-top: 34px;
  font-size: clamp(64px, 7.4vw, 128px);
  line-height: 1.03;
}

h2 {
  font-size: clamp(42px, 4.8vw, 84px);
  line-height: 1.18;
}

h3 {
  font-size: 23px;
  line-height: 1.35;
}

p {
  margin: 0;
}

.hero-lede,
.section-heading p,
.split-section p {
  color: var(--secondary);
  font-size: 18px;
  line-height: 1.8;
}

.hero-lede {
  max-width: 820px;
  margin-top: 28px;
}

.hero-actions,
.cta-tags,
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-actions {
  margin-top: 34px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: transform 180ms var(--ease), box-shadow 180ms var(--ease), background 180ms var(--ease);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn.primary {
  color: var(--warm-paper);
  background: var(--quiet-green);
  box-shadow: 0 14px 28px rgba(72, 107, 90, 0.18);
}

.btn.secondary {
  color: var(--quiet-green);
  background: transparent;
  border-color: rgba(72, 107, 90, 0.28);
}

.btn.light {
  color: var(--quiet-green);
  background: var(--warm-paper);
}

.btn.full {
  width: 100%;
}

.quiet-note {
  margin-top: 20px;
  color: var(--fog-gray);
  font-size: 14px;
}

.product-preview {
  position: relative;
}

.phone-card {
  width: clamp(460px, 33vw, 620px);
  margin-left: auto;
  padding: clamp(24px, 2.2vw, 38px);
  border: 1px solid rgba(31, 37, 35, 0.11);
  border-radius: 52px;
  background: linear-gradient(145deg, rgba(255, 253, 247, 0.94), rgba(247, 243, 234, 0.8));
  box-shadow: var(--shadow-soft);
}

.phone-head,
.card-row,
.paper-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: var(--fog-gray);
  font-size: 14px;
}

.mainline-card,
.today-card,
.module-card,
.paper-card,
.result-card,
.pain-grid article,
.signup-card {
  background: var(--warm-paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.mainline-card {
  margin-top: 28px;
  padding: clamp(22px, 2vw, 32px);
  background: var(--mist-green);
  border-color: rgba(72, 107, 90, 0.18);
}

.mainline-card h3,
.today-card h3 {
  margin-top: 14px;
  font-family: var(--font-body);
  font-size: clamp(20px, 1.4vw, 28px);
  letter-spacing: 0;
}

.line-progress {
  height: 2px;
  margin-top: 18px;
  background: linear-gradient(90deg, var(--quiet-green) 0 58%, rgba(72, 107, 90, 0.16) 58%);
}

.today-card {
  margin-top: 20px;
  padding: clamp(24px, 2vw, 34px);
}

.chips {
  margin-top: 16px;
}

.chips span,
.cta-tags span {
  padding: 7px 12px;
  border: 1px solid rgba(72, 107, 90, 0.18);
  border-radius: var(--radius-pill);
  color: var(--quiet-green);
  background: rgba(221, 232, 225, 0.72);
  font-size: 13px;
}

.evidence {
  margin: 18px 0;
  padding: 14px 16px;
  color: var(--secondary);
  border-left: 3px solid var(--muted-gold);
  background: rgba(185, 149, 85, 0.08);
  border-radius: 14px;
}

.quick-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-top: 16px;
}

.quick-grid span {
  padding: 14px 8px;
  text-align: center;
  font-size: 13px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 253, 247, 0.76);
}

.split-section {
  display: grid;
  grid-template-columns: minmax(140px, 0.18fr) 1fr;
  gap: clamp(48px, 7vw, 120px);
}

.section-main > p,
.section-heading p {
  max-width: 980px;
  margin-top: 18px;
}

.pain-grid,
.module-grid {
  display: grid;
  gap: 18px;
  margin-top: 44px;
}

.pain-grid {
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(20px, 2vw, 34px);
}

.pain-grid article,
.module-card {
  padding: 26px;
}

.pain-grid h3,
.module-card h3 {
  margin-top: 22px;
  font-family: var(--font-body);
  font-size: 22px;
  letter-spacing: 0;
}

.pain-grid p,
.module-card p,
.module-card small,
.result-block p,
.comparison-row span,
.signup-card p {
  color: var(--secondary);
  line-height: 1.75;
}

.module-grid {
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(20px, 1.8vw, 32px);
}

.module-card span {
  color: var(--quiet-green);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-weight: 700;
}

.module-card p {
  margin-top: 14px;
}

.module-card small {
  display: block;
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.mainline-banner {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-top: 24px;
  padding: 22px 24px;
  border: 1px solid rgba(72, 107, 90, 0.18);
  border-radius: var(--radius-lg);
  color: var(--quiet-green);
  background: var(--mist-green);
}

.example-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(28px, 4vw, 72px);
  margin-top: 44px;
}

.paper-card,
.result-card {
  padding: 28px;
}

.messy {
  min-height: 360px;
  margin-top: 22px;
  color: var(--secondary);
  font-size: 18px;
  line-height: 2;
  background-image: linear-gradient(var(--line) 1px, transparent 1px);
  background-size: 100% 48px;
}

.result-block {
  margin-top: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
}

.result-block strong {
  display: inline-flex;
  margin-bottom: 10px;
  padding: 6px 10px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  background: var(--pale-gray);
}

.result-block.danger {
  border-color: rgba(184, 107, 98, 0.24);
  background: rgba(184, 107, 98, 0.06);
}

.result-block.danger strong {
  color: var(--soft-red);
  background: rgba(184, 107, 98, 0.1);
}

.result-block.calm,
.result-block.action {
  background: rgba(221, 232, 225, 0.38);
  border-color: rgba(72, 107, 90, 0.18);
}

.result-block.action h3 {
  margin: 8px 0;
  font-family: var(--font-body);
  font-size: 22px;
  letter-spacing: 0;
}

.comparison {
  margin-top: 44px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: var(--warm-paper);
}

.comparison-row {
  display: grid;
  grid-template-columns: 0.8fr 1fr 1.55fr 2.15fr;
  gap: 18px;
  padding: 20px 24px;
  border-top: 1px solid var(--line);
}

.comparison-row:first-child {
  border-top: 0;
}

.comparison-row.header {
  color: var(--ink);
  background: rgba(221, 232, 225, 0.36);
  font-weight: 700;
}

.comparison-row strong {
  font-weight: 700;
}

.cta-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  padding: 56px;
  border-radius: var(--radius-xl);
  color: var(--warm-paper);
  background: var(--quiet-green);
}

.cta-band p {
  max-width: 700px;
  margin-top: 18px;
  color: rgba(255, 253, 247, 0.8);
  line-height: 1.8;
}

.cta-tags {
  margin-top: 24px;
}

.cta-tags span {
  color: var(--warm-paper);
  background: rgba(255, 253, 247, 0.08);
  border-color: rgba(255, 253, 247, 0.22);
}

.signup-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 44px;
  padding: 42px;
}

.signup-card > div,
.signup-card .wide,
.signup-card button,
.form-status {
  grid-column: 1 / -1;
}

label {
  display: grid;
  gap: 10px;
  color: var(--ink);
  font-weight: 600;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 15px 16px;
  color: var(--ink);
  background: rgba(247, 243, 234, 0.42);
  outline: none;
}

textarea {
  min-height: 132px;
  resize: vertical;
}

input:focus,
textarea:focus {
  border-color: rgba(72, 107, 90, 0.45);
  box-shadow: 0 0 0 4px rgba(72, 107, 90, 0.08);
}

.form-status {
  color: var(--fog-gray);
  font-size: 13px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
  margin: 0;
  padding: 48px var(--page-pad) 64px;
  color: var(--fog-gray);
  font-size: 14px;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 360ms var(--ease), transform 360ms var(--ease);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 900px) {
  .site-header {
    align-items: flex-start;
  }

  .site-nav {
    display: none;
  }

  .hero,
  .split-section,
  .example-grid,
  .signup-card {
    grid-template-columns: 1fr;
  }

  .hero {
    gap: 44px;
    min-height: auto;
    padding-top: 72px;
  }

  .phone-card {
    width: min(100%, 520px);
    margin: 0;
  }

  .pain-grid,
  .module-grid {
    grid-template-columns: 1fr;
  }

  .comparison-row {
    grid-template-columns: 1fr;
  }

  .comparison-row.header {
    display: none;
  }

  .mainline-banner,
  .cta-band,
  .site-footer {
    flex-direction: column;
  }
}

@media (max-width: 560px) {
  .site-header {
    padding: 12px 20px;
  }

  :root {
    --page-pad: 20px;
  }

  .brand small,
  .nav-cta {
    display: none;
  }

  .section-shell {
    padding: 64px 0;
  }

  h1 {
    font-size: 48px;
  }

  .quick-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .cta-band,
  .signup-card {
    padding: 28px;
  }
}