:root {
  --bg: #f6f1e7;
  --paper: rgba(255, 250, 242, 0.82);
  --paper-strong: #fffaf3;
  --ink: #171c1b;
  --muted: #5f655c;
  --line: rgba(23, 28, 27, 0.1);
  --accent: #b64a2b;
  --accent-dark: #8f371d;
  --accent-2: #0e7466;
  --accent-3: #d2a64a;
  --deep: #142228;
  --deep-soft: #20343c;
  --radius-xl: 34px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --shadow: 0 26px 80px rgba(52, 38, 18, 0.14);
  --max-width: 1240px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 0%, rgba(182, 74, 43, 0.16), transparent 22%),
    radial-gradient(circle at 90% 10%, rgba(14, 116, 102, 0.14), transparent 18%),
    linear-gradient(180deg, #faf6ef 0%, #f4eee3 40%, #efe6d8 100%);
  font-family: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

button,
input,
textarea,
select {
  font: inherit;
}

.page-shell {
  position: relative;
  overflow: hidden;
}

.page-shell::before,
.page-shell::after {
  content: "";
  position: fixed;
  width: 26rem;
  height: 26rem;
  border-radius: 999px;
  filter: blur(48px);
  opacity: 0.28;
  pointer-events: none;
}

.page-shell::before {
  top: -10rem;
  right: -8rem;
  background: rgba(210, 166, 74, 0.4);
}

.page-shell::after {
  left: -10rem;
  bottom: -12rem;
  background: rgba(14, 116, 102, 0.24);
}

.site-header,
.hero,
.section,
.site-footer {
  width: min(calc(100% - 2.4rem), var(--max-width));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1rem;
  padding: 0.95rem 1.2rem;
  border: 1px solid rgba(255, 255, 255, 0.48);
  border-radius: 999px;
  background: rgba(250, 245, 237, 0.78);
  backdrop-filter: blur(18px);
  box-shadow: 0 10px 40px rgba(22, 26, 23, 0.08);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.brand-mark {
  width: 0.95rem;
  height: 0.95rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-3) 54%, var(--accent-2) 100%);
  box-shadow: 0 0 0 6px rgba(182, 74, 43, 0.1);
}

.site-nav {
  display: inline-flex;
  align-items: center;
  gap: 1.15rem;
  color: var(--muted);
  font-size: 0.94rem;
}

.site-nav a {
  padding: 0.25rem 0;
  border-bottom: 1px solid transparent;
  transition: color 180ms ease, border-color 180ms ease;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--ink);
  border-color: rgba(23, 28, 27, 0.36);
}

.nav-cta,
.button,
.tab-button,
.planner-button,
.conversion-bar button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  transition:
    transform 180ms ease,
    background 180ms ease,
    box-shadow 180ms ease,
    border-color 180ms ease;
}

.nav-cta,
.button:hover,
.tab-button:hover {
  transform: translateY(-1px);
}

.nav-cta {
  padding: 0.78rem 1.15rem;
  background: var(--ink);
  color: #f7efe3;
  font-size: 0.92rem;
}

.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 1.5rem;
  align-items: center;
  padding: 4.8rem 0 3.2rem;
}

.eyebrow,
.chapter-kicker,
.summary-index,
.card-index,
.process-step span,
.roadmap-card span,
.metric-box p {
  margin: 0;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.eyebrow,
.chapter-kicker,
.summary-index,
.card-index,
.process-step span,
.roadmap-card span {
  color: var(--accent-2);
}

.hero h1,
.section-heading h2,
.chapter-head h2,
.hero-panel-main h2,
.card-head h3,
.summary-card h3,
.info-card h3,
.structure-copy h3,
.persona-card h3,
.factory-card h3,
.tab-panel h3,
.hook-card h3,
.iteration-card h3,
.roadmap-card h3,
.target-band h3 {
  margin: 0;
  font-family: "Iowan Old Style", "Noto Serif SC", "Songti SC", serif;
  font-weight: 700;
  letter-spacing: -0.04em;
}

.hero h1 {
  font-size: clamp(3rem, 7vw, 5.8rem);
  line-height: 0.96;
}

.hero h1 span {
  display: block;
  color: var(--accent);
}

.hero-text,
.section-lead,
.chapter-head p,
.info-card p,
.summary-card p,
.structure-grid p,
.priority-note p,
.priority-note li,
.persona-card li,
.factory-card p,
.factory-card li,
.tool-card li,
.schedule-list li,
.relay-list li,
.funnel-grid p,
.hook-card p,
.metrics-card li,
.warning-grid p,
.iteration-card p,
.roadmap-card li,
.target-grid span,
.site-footer span,
.hero-note {
  color: var(--muted);
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 2rem;
}

.hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1rem;
}

.hero-chips span {
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 0.85rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.56);
  border: 1px solid rgba(23, 28, 27, 0.08);
  color: var(--muted);
  font-size: 0.92rem;
}

.button {
  padding: 0.95rem 1.35rem;
  font-weight: 600;
}

.button-primary {
  background: var(--accent);
  color: #fff7ef;
  box-shadow: 0 14px 36px rgba(182, 74, 43, 0.28);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(23, 28, 27, 0.1);
}

.hero-note {
  margin-top: 1.5rem;
  padding: 1rem 1.1rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(23, 28, 27, 0.08);
  background: rgba(255, 255, 255, 0.42);
}

.hero-panel,
.data-card,
.info-card,
.summary-card,
.planner-card,
.convert-card,
.platform-panel,
.priority-note,
.persona-card,
.ops-board,
.factory-card,
.tool-card,
.template-tabs,
.schedule-card,
.funnel-card,
.hook-card,
.metrics-card,
.warning-board,
.iteration-card,
.roadmap-card,
.target-band,
.structure-grid article,
.metric-box,
.warning-grid article {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--paper);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
}

.hero-panel {
  position: relative;
  padding: 1.2rem;
  border-radius: 36px;
  background: linear-gradient(180deg, rgba(17, 33, 39, 0.98), rgba(23, 45, 53, 0.98));
  color: #f6efe3;
  box-shadow: 0 30px 90px rgba(20, 34, 40, 0.24);
}

.hero-panel::before,
.section-dark::before,
.section-accent::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
}

.hero-panel::before {
  background:
    radial-gradient(circle at top right, rgba(210, 166, 74, 0.24), transparent 30%),
    linear-gradient(135deg, rgba(182, 74, 43, 0.1), transparent 38%);
}

.hero-panel-main {
  padding: 1.4rem;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.05);
}

.hero-panel-main p,
.hero-panel-main span,
.metric-box p {
  color: rgba(246, 239, 227, 0.74);
}

.hero-panel-main h2 {
  margin-top: 0.4rem;
  font-size: 2rem;
  line-height: 1.08;
}

.hero-panel-main span {
  display: block;
  margin-top: 0.9rem;
  line-height: 1.7;
}

.hero-metric-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.metric-box {
  min-height: 8.5rem;
  padding: 1.15rem;
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.08);
}

.metric-box strong {
  display: block;
  margin-top: 0.7rem;
  font-size: 1.15rem;
  line-height: 1.6;
}

.metric-box.accent {
  background: linear-gradient(135deg, rgba(182, 74, 43, 0.18), rgba(210, 166, 74, 0.14));
}

.section {
  position: relative;
  padding: 2.8rem 0 5rem;
}

.section-convert {
  padding-top: 0.5rem;
}

.section-intro {
  padding-top: 1rem;
}

.section-heading,
.chapter-head,
.card-head {
  display: flex;
  gap: 1.4rem;
}

.section-heading.split,
.chapter-head {
  justify-content: space-between;
  align-items: end;
}

.section-heading h2,
.chapter-head h2 {
  font-size: clamp(2.3rem, 4vw, 4rem);
  line-height: 0.98;
}

.section-lead,
.chapter-head p {
  max-width: 35rem;
  margin: 0;
}

.summary-grid,
.three-up,
.persona-grid,
.grade-grid,
.toolkit-grid,
.hook-grid,
.iteration-grid,
.roadmap-grid,
.warning-grid,
.target-grid,
.structure-grid,
.metric-columns,
.factory-parts,
.funnel-grid {
  display: grid;
  gap: 1rem;
}

.summary-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.convert-layout {
  display: grid;
  grid-template-columns: 1.1fr 1.15fr 0.75fr;
  gap: 1rem;
}

.convert-card {
  padding: 1.35rem;
}

.convert-card.featured {
  background:
    radial-gradient(circle at top right, rgba(210, 166, 74, 0.18), transparent 30%),
    linear-gradient(180deg, rgba(255, 247, 235, 0.96), rgba(255, 252, 247, 0.88));
}

.convert-card ul {
  margin: 1rem 0 0;
  padding-left: 1.1rem;
  color: var(--muted);
  line-height: 1.8;
}

.convert-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.2rem;
}

.lead-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.95rem;
}

.lead-form label {
  display: grid;
  gap: 0.45rem;
}

.lead-form label span {
  font-size: 0.92rem;
  font-weight: 600;
}

.lead-form label.full,
.form-actions.full,
.form-feedback.full {
  grid-column: 1 / -1;
}

.lead-form input,
.lead-form select,
.lead-form textarea {
  width: 100%;
  padding: 0.9rem 1rem;
  border: 1px solid rgba(23, 28, 27, 0.12);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.82);
  color: var(--ink);
}

.lead-form input:focus,
.lead-form select:focus,
.lead-form textarea:focus {
  outline: 2px solid rgba(14, 116, 102, 0.18);
  border-color: rgba(14, 116, 102, 0.45);
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.form-feedback {
  margin: 0;
  min-height: 1.8rem;
  color: var(--muted);
}

.form-feedback.is-success {
  color: var(--accent-2);
}

.wechat-card {
  background:
    radial-gradient(circle at top left, rgba(14, 116, 102, 0.18), transparent 24%),
    linear-gradient(180deg, rgba(24, 39, 41, 0.98), rgba(19, 31, 35, 0.98));
  color: #f8f1e7;
}

.wechat-card p,
.wechat-card .card-head .eyebrow {
  color: rgba(248, 241, 231, 0.78);
}

.wechat-id {
  margin-top: 0.6rem;
  padding: 1rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-align: center;
}

.wechat-steps {
  display: grid;
  gap: 0.7rem;
  margin-top: 1rem;
}

.wechat-steps span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.65rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  text-align: center;
}

.planner-card {
  margin-top: 1rem;
  padding: 1.35rem;
}

.summary-card,
.info-card,
.persona-card,
.hook-card,
.iteration-card,
.roadmap-card,
.warning-grid article {
  padding: 1.4rem;
}

.summary-card h3,
.info-card h3,
.persona-card h3,
.hook-card h3,
.iteration-card h3,
.roadmap-card h3 {
  margin-top: 1rem;
  font-size: 1.42rem;
}

.chapter {
  scroll-margin-top: 6.4rem;
}

.data-card,
.platform-panel,
.ops-board,
.template-tabs,
.funnel-card,
.warning-board,
.target-band,
.metrics-card,
.schedule-card,
.tool-card {
  padding: 1.35rem;
}

.card-head {
  justify-content: space-between;
  align-items: end;
  margin-bottom: 1rem;
}

.card-head h3 {
  font-size: clamp(1.8rem, 2.8vw, 2.8rem);
  line-height: 1;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid rgba(23, 28, 27, 0.08);
  border-radius: 18px;
}

.table-wrap table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
}

.table-wrap th,
.table-wrap td {
  padding: 1rem 1rem;
  text-align: left;
  border-bottom: 1px solid rgba(23, 28, 27, 0.08);
  font-size: 0.96rem;
}

.table-wrap thead {
  background: rgba(23, 28, 27, 0.04);
}

.row-highlight {
  background: rgba(182, 74, 43, 0.08);
}

.three-up,
.persona-grid,
.grade-grid,
.metric-columns,
.factory-parts,
.funnel-grid,
.target-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.matrix-structure {
  margin-top: 1rem;
  padding: 1.4rem;
  border-radius: 30px;
  border: 1px solid rgba(23, 28, 27, 0.08);
  background: rgba(255, 255, 255, 0.45);
}

.structure-copy {
  margin-bottom: 1rem;
}

.structure-grid article {
  padding: 1.25rem;
}

.structure-grid strong,
.grade-grid strong,
.process-step strong,
.funnel-grid strong,
.target-grid strong,
.metric-columns strong,
.warning-grid strong,
.factory-parts strong,
.roadmap-card span {
  display: block;
}

.structure-grid span,
.grade-grid span,
.target-grid span,
.metric-columns li,
.funnel-grid p,
.factory-parts p {
  margin-top: 0.6rem;
}

.traffic-chain,
.funnel-flow,
.process-strip {
  display: grid;
  gap: 0.8rem;
}

.traffic-chain {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 1rem;
}

.traffic-chain span,
.funnel-flow span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.4rem;
  padding: 0.7rem;
  border-radius: 999px;
  background: var(--deep);
  color: #f9f1e6;
  text-align: center;
}

.section-dark,
.section-accent {
  color: #f6efe4;
}

.section-dark::before,
.section-accent::before {
  z-index: -1;
}

.section-dark::before {
  background:
    radial-gradient(circle at top left, rgba(182, 74, 43, 0.24), transparent 24%),
    linear-gradient(135deg, rgba(19, 35, 41, 1), rgba(27, 48, 56, 0.98));
  border-radius: 40px;
}

.section-accent::before {
  background:
    radial-gradient(circle at 88% 14%, rgba(210, 166, 74, 0.18), transparent 20%),
    linear-gradient(135deg, rgba(16, 39, 38, 0.98), rgba(29, 54, 43, 0.98));
  border-radius: 40px;
}

.section-dark .chapter-head p,
.section-dark .priority-note p,
.section-dark .priority-note li,
.section-dark .persona-card li,
.section-dark .grade-grid p,
.section-accent .schedule-list li,
.section-accent .relay-list li,
.section-accent .funnel-grid p,
.section-accent .hook-card p {
  color: rgba(246, 239, 228, 0.76);
}

.section-dark .platform-panel,
.section-dark .priority-note,
.section-dark .persona-card,
.section-dark .ops-board,
.section-accent .schedule-card,
.section-accent .funnel-card,
.section-accent .hook-card {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.18);
}

.section-dark .table-wrap,
.section-accent .funnel-flow span {
  border-color: rgba(255, 255, 255, 0.1);
}

.section-dark .table-wrap thead,
.section-dark .row-highlight {
  background: rgba(255, 255, 255, 0.05);
}

.section-dark .table-wrap th,
.section-dark .table-wrap td {
  border-bottom-color: rgba(255, 255, 255, 0.08);
}

.platform-layout,
.factory-layout,
.schedule-layout,
.metrics-layout {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 1rem;
}

.priority-note ul,
.persona-card ul,
.factory-card ul,
.tool-card ul,
.schedule-list,
.relay-list,
.metrics-card ul,
.metrics-card ol,
.warning-grid,
.roadmap-card ul {
  margin: 0;
  padding-left: 1.1rem;
}

.priority-note h3 {
  margin: 0 0 0.7rem;
  font-size: 1.4rem;
}

.ops-board,
.factory-card.large,
.warning-board,
.target-band {
  margin-top: 1rem;
}

.grade-grid article,
.metric-columns > div,
.factory-parts > div,
.funnel-grid article,
.target-grid article {
  padding: 1.15rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(23, 28, 27, 0.08);
}

.section-dark .grade-grid article {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.08);
}

.factory-layout {
  align-items: start;
}

.factory-card.large {
  min-height: 100%;
}

.process-strip {
  grid-template-columns: repeat(6, minmax(0, 1fr));
  margin-top: 1rem;
}

.process-step {
  padding: 1rem;
  border-radius: 22px;
  border: 1px solid rgba(23, 28, 27, 0.08);
  background: rgba(255, 255, 255, 0.52);
  box-shadow: var(--shadow);
}

.process-step em {
  display: block;
  margin-top: 0.7rem;
  color: var(--muted);
  font-style: normal;
  line-height: 1.6;
}

.toolkit-grid {
  grid-template-columns: 1.08fr 0.92fr;
  margin-top: 1rem;
}

.tool-card pre {
  overflow-x: auto;
  padding: 1rem;
  border-radius: 18px;
  background: #1d2528;
  color: #eef3ef;
  font-size: 0.9rem;
  line-height: 1.7;
}

.template-tabs {
  margin-top: 1rem;
}

.planner-switch {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.planner-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1rem;
  border: 1px solid rgba(23, 28, 27, 0.08);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.56);
  cursor: pointer;
  transition:
    transform 180ms ease,
    background 180ms ease,
    color 180ms ease;
}

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

.planner-button.is-active {
  background: var(--ink);
  color: #fff5ea;
}

.planner-panels {
  margin-top: 1rem;
}

.planner-panel {
  display: none;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.planner-panel.is-active {
  display: grid;
}

.planner-panel div {
  padding: 1.1rem;
  border-radius: 18px;
  border: 1px solid rgba(23, 28, 27, 0.08);
  background: rgba(255, 255, 255, 0.58);
}

.planner-panel strong,
.planner-panel span {
  display: block;
}

.planner-panel span {
  margin-top: 0.55rem;
  color: var(--muted);
  line-height: 1.7;
}

.tab-bar {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-bottom: 1rem;
}

.tab-button {
  padding: 0.7rem 1rem;
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(23, 28, 27, 0.08);
}

.tab-button.is-active {
  background: var(--ink);
  color: #fff6ec;
}

.tab-panel {
  display: none;
  padding: 1.15rem 0.2rem 0.2rem;
}

.tab-panel.is-active {
  display: block;
}

.tab-panel ol {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
  line-height: 1.9;
}

.schedule-list,
.relay-list {
  line-height: 1.8;
}

.funnel-flow {
  grid-template-columns: repeat(7, minmax(0, 1fr));
  margin-bottom: 1rem;
}

.hook-grid,
.iteration-grid,
.roadmap-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.metrics-layout {
  margin-bottom: 1rem;
}

.section-checklist {
  padding-bottom: 5.6rem;
}

.target-band {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
}

.target-grid article {
  background: rgba(23, 28, 27, 0.94);
  color: #f8f0e4;
}

.target-grid strong {
  font-size: 1.65rem;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.4rem 0 6.5rem;
  border-top: 1px solid rgba(23, 28, 27, 0.08);
}

.site-footer p {
  margin: 0;
  font-weight: 600;
}

.conversion-bar {
  position: fixed;
  left: 50%;
  bottom: 1rem;
  z-index: 60;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  width: min(calc(100% - 1.6rem), 760px);
  padding: 0.8rem;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background: rgba(20, 34, 40, 0.9);
  backdrop-filter: blur(18px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.18);
  transform: translateX(-50%);
}

.conversion-bar a,
.conversion-bar button {
  flex: 1;
  min-width: 0;
  padding: 0.9rem 1rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff4ea;
  text-align: center;
  border: 0;
}

.conversion-bar a:first-child,
.conversion-bar button {
  background: rgba(182, 74, 43, 0.92);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 560ms ease, transform 560ms ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1120px) {
  .site-nav {
    display: none;
  }

  .hero,
  .convert-layout,
  .platform-layout,
  .factory-layout,
  .schedule-layout,
  .metrics-layout,
  .toolkit-grid,
  .target-band {
    grid-template-columns: 1fr;
  }

  .summary-grid,
  .three-up,
  .persona-grid,
  .grade-grid,
  .hook-grid,
  .iteration-grid,
  .roadmap-grid,
  .metric-columns,
  .factory-parts,
  .funnel-grid,
  .target-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .process-strip,
  .funnel-flow,
  .traffic-chain {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .site-header {
    border-radius: 24px;
    padding: 0.9rem 1rem;
  }

  .brand-text {
    font-size: 0.92rem;
  }

  .nav-cta {
    padding: 0.72rem 0.92rem;
    font-size: 0.84rem;
  }

  .hero {
    padding-top: 3.2rem;
  }

  .section,
  .section-checklist {
    padding-top: 2.5rem;
    padding-bottom: 3.8rem;
  }

  .section-heading.split,
  .chapter-head,
  .card-head,
  .site-footer {
    display: block;
  }

  .summary-grid,
  .convert-layout,
  .three-up,
  .persona-grid,
  .grade-grid,
  .toolkit-grid,
  .hook-grid,
  .iteration-grid,
  .roadmap-grid,
  .warning-grid,
  .target-grid,
  .structure-grid,
  .metric-columns,
  .factory-parts,
  .funnel-grid,
  .hero-metric-grid,
  .process-strip,
  .funnel-flow,
  .traffic-chain {
    grid-template-columns: 1fr;
  }

  .tab-bar {
    display: grid;
    grid-template-columns: 1fr;
  }

  .planner-panel {
    grid-template-columns: 1fr;
  }

  .lead-form {
    grid-template-columns: 1fr;
  }

  .conversion-bar {
    left: 0.8rem;
    right: 0.8rem;
    width: auto;
    border-radius: 24px;
    transform: none;
  }

  .conversion-bar a,
  .conversion-bar button {
    width: 100%;
    flex: none;
  }
}