:root {
  --sand: #e9dfcd;
  --sand-light: #f5eee3;
  --sand-deep: #cdbd9f;
  --espresso: #211914;
  --espresso-soft: #3b2b23;
  --blue: #1249db;
  --blue-deep: #0b35a5;
  --line: rgba(33, 25, 20, 0.22);
  --paper: #fbf8f1;
  --white: #fffdf8;
  --max: 1320px;
  --mono: "SFMono-Regular", "Cascadia Code", "Roboto Mono", "Noto Sans Mono CJK SC", "Microsoft YaHei", monospace;
  --sans: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  --shadow: 0 24px 70px rgba(47, 35, 25, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  margin: 0;
  background: var(--sand-light);
  color: var(--espresso);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.menu-open {
  overflow: hidden;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  color: inherit;
  font: inherit;
}

:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 12px;
  left: 12px;
  padding: 11px 15px;
  background: var(--espresso);
  color: var(--white);
  transform: translateY(-150%);
  transition: transform 180ms ease;
  font: 700 13px/1 var(--mono);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: fixed;
  z-index: 100;
  inset: 0 0 auto;
  height: 76px;
  display: flex;
  align-items: stretch;
  border-bottom: 1px solid rgba(33, 25, 20, 0.28);
  background: rgba(233, 223, 205, 0.91);
  backdrop-filter: blur(18px);
  transition: box-shadow 220ms ease, background-color 220ms ease;
}

.site-header.is-scrolled {
  background: rgba(245, 238, 227, 0.94);
  box-shadow: 0 8px 32px rgba(33, 25, 20, 0.08);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  width: min(39vw, 520px);
  min-width: 360px;
  padding: 0 3vw;
  border-right: 1px solid var(--line);
}

.brand-mark {
  position: relative;
  width: 32px;
  height: 32px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border: 1px solid var(--espresso);
  transform: rotate(45deg);
}

.brand-mark i {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--blue);
  border-radius: 50%;
}

.brand-mark i:nth-child(1) { transform: translate(-7px, 0); }
.brand-mark i:nth-child(2) { transform: translate(0, 0); }
.brand-mark i:nth-child(3) { transform: translate(7px, 0); }

.brand-name {
  display: flex;
  align-items: baseline;
  gap: 5px;
  font: 700 15px/1.2 var(--mono);
  letter-spacing: -0.04em;
  white-space: nowrap;
}

.brand-name span {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0;
  opacity: 0.68;
}

.site-nav {
  display: flex;
  align-items: stretch;
  margin-left: auto;
}

.site-nav a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 112px;
  padding: 0 22px;
  border-left: 1px solid var(--line);
  font: 700 12px/1 var(--mono);
  transition: background-color 180ms ease, color 180ms ease;
}

.site-nav a:hover {
  background: var(--white);
}

.site-nav .nav-cta {
  gap: 30px;
  min-width: 168px;
  background: var(--blue);
  color: var(--white);
  border-color: var(--blue);
}

.site-nav .nav-cta:hover {
  background: var(--blue-deep);
}

.nav-cta span {
  font-size: 17px;
}

.menu-toggle {
  display: none;
}

main {
  position: relative;
}

.hero {
  position: relative;
  min-height: 780px;
  height: max(780px, 100svh);
  padding: 76px max(5vw, calc((100vw - var(--max)) / 2)) 52px;
  display: grid;
  grid-template-columns: minmax(0, 0.91fr) minmax(520px, 0.92fr);
  grid-template-rows: 1fr auto;
  align-items: center;
  column-gap: 6vw;
  overflow: hidden;
  background: var(--sand);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 76px auto 0 58%;
  width: 1px;
  background: var(--line);
}

.hero-grid {
  position: absolute;
  inset: 76px 0 0;
  opacity: 0.34;
  background-image: radial-gradient(rgba(33, 25, 20, 0.55) 0.75px, transparent 0.75px);
  background-size: 15px 15px;
  mask-image: linear-gradient(90deg, transparent 0%, #000 30%, #000 100%);
}

.hero-orbit {
  position: absolute;
  border: 1px solid rgba(18, 73, 219, 0.25);
  border-radius: 50%;
  pointer-events: none;
  will-change: transform;
}

.hero-orbit--one {
  width: 48vw;
  height: 48vw;
  min-width: 620px;
  min-height: 620px;
  right: -11vw;
  top: 10vh;
}

.hero-orbit--two {
  width: 290px;
  height: 290px;
  left: -140px;
  bottom: 4vh;
  border-color: rgba(33, 25, 20, 0.2);
}

.hero-copy,
.hero-poster,
.hero-meta {
  position: relative;
  z-index: 2;
}

.hero-copy {
  padding-top: 4vh;
}

.eyebrow {
  display: inline-flex;
  margin-bottom: 35px;
  border: 1px solid var(--espresso);
  background: rgba(245, 238, 227, 0.54);
}

.eyebrow span {
  padding: 8px 13px;
  font: 700 11px/1 var(--mono);
  letter-spacing: 0.14em;
}

.eyebrow span + span {
  border-left: 1px solid var(--espresso);
  color: var(--blue);
}

.hero h1 {
  margin: 0;
  max-width: 730px;
  font: 600 clamp(48px, 5.4vw, 80px)/1.08 var(--sans);
  letter-spacing: -0.075em;
}

.hero h1 em {
  position: relative;
  color: var(--blue);
  font-style: normal;
}

.hero h1 em::after {
  content: "";
  position: absolute;
  height: 7px;
  left: 3px;
  right: 0;
  bottom: -10px;
  background: repeating-linear-gradient(90deg, var(--blue) 0 28px, transparent 28px 34px);
  opacity: 0.85;
}

.hero-copy > p {
  max-width: 590px;
  margin: 38px 0 0;
  color: rgba(33, 25, 20, 0.75);
  font-size: 16px;
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 32px;
  margin-top: 40px;
}

.button {
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 0 18px;
  border: 1px solid var(--espresso);
  background: transparent;
  font: 700 13px/1 var(--mono);
  cursor: pointer;
  transition: transform 180ms ease, background-color 180ms ease, color 180ms ease;
}

.button:hover {
  transform: translateY(-3px);
}

.button--primary {
  min-width: 190px;
  background: var(--espresso);
  color: var(--white);
}

.button--primary:hover {
  background: var(--blue);
  border-color: var(--blue);
}

.button--text {
  min-height: auto;
  padding: 6px 0;
  border-width: 0 0 1px;
}

.hero-poster {
  justify-self: center;
  width: min(510px, 92%);
  height: 560px;
  margin-top: 2vh;
}

.poster-shadow {
  position: absolute;
  inset: 85px -18px 12px 78px;
  background: rgba(33, 25, 20, 0.17);
  filter: blur(24px);
  transform: rotate(4deg);
}

.poster-card {
  position: absolute;
  will-change: transform;
}

.poster-card--back {
  inset: 8px 62px 44px 14px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 36px 22px;
  border: 1px solid var(--espresso);
  background: var(--sand-deep);
  transform: rotate(-7deg);
  color: rgba(33, 25, 20, 0.7);
  font: 700 10px/1 var(--mono);
  letter-spacing: 0.22em;
}

.poster-card--main {
  inset: 42px 6px 5px 48px;
  display: flex;
  flex-direction: column;
  padding: 26px;
  border: 1px solid var(--espresso);
  background: var(--paper);
  box-shadow: var(--shadow);
  transform: rotate(2.5deg);
}

.poster-card--main::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(33, 25, 20, 0.28) 0.65px, transparent 0.65px);
  background-size: 12px 12px;
  opacity: 0.3;
}

.poster-topline {
  position: relative;
  display: flex;
  justify-content: space-between;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--espresso);
  font: 700 10px/1 var(--mono);
  letter-spacing: 0.14em;
}

.poster-index {
  position: relative;
  padding: 28px 0 16px;
  color: var(--blue);
  font: 700 62px/1 var(--mono);
  letter-spacing: -0.1em;
}

.poster-flow {
  position: relative;
  margin: auto 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--espresso);
}

.poster-flow li {
  display: grid;
  grid-template-columns: 54px 1fr;
  align-items: center;
  min-height: 64px;
  border-bottom: 1px solid var(--espresso);
}

.poster-flow li span {
  font: 700 12px/1 var(--mono);
  color: var(--blue);
}

.poster-flow li strong {
  font: 600 20px/1 var(--sans);
  letter-spacing: 0.05em;
}

.poster-stamp {
  position: absolute;
  right: 38px;
  top: 145px;
  width: 94px;
  height: 94px;
  display: grid;
  place-items: center;
  border: 1px solid var(--blue);
  border-radius: 50%;
  color: var(--blue);
  transform: rotate(12deg);
  font: 700 12px/1 var(--mono);
}

.poster-stamp::before,
.poster-stamp::after {
  content: "";
  position: absolute;
  inset: 7px;
  border: 1px dashed var(--blue);
  border-radius: 50%;
}

.poster-stamp::after {
  inset: 43px -8px auto;
  border-width: 1px 0 0;
  border-radius: 0;
}

.poster-stamp i {
  position: absolute;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--blue);
  transform: translateY(-22px);
}

.poster-note {
  position: absolute;
  z-index: 3;
  right: -22px;
  bottom: 48px;
  width: 148px;
  padding: 16px;
  border: 1px solid var(--espresso);
  background: var(--blue);
  color: var(--white);
  box-shadow: 9px 9px 0 var(--espresso);
  transform: rotate(-2deg);
  will-change: transform;
}

.poster-note p {
  margin: 12px 0 0;
  font: 700 12px/1.6 var(--mono);
}

.signal {
  display: block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--white);
  box-shadow: 13px 0 0 rgba(255,255,255,0.6), 26px 0 0 rgba(255,255,255,0.3);
}

.hero-meta {
  grid-column: 1 / -1;
  align-self: end;
  display: flex;
  align-items: center;
  gap: 18px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  font: 700 10px/1 var(--mono);
  letter-spacing: 0.18em;
}

.hero-meta i {
  width: 3px;
  height: 3px;
  background: var(--blue);
  border-radius: 50%;
}

.section-shell {
  width: min(calc(100% - 10vw), var(--max));
  margin-inline: auto;
}

.section-code,
.kicker {
  font-family: var(--mono);
  font-weight: 700;
  text-transform: uppercase;
}

.section-code {
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--blue);
}

.kicker {
  margin: 0 0 22px;
  font-size: 12px;
  letter-spacing: 0.14em;
}

.intro {
  display: grid;
  grid-template-columns: 0.34fr 1.2fr 0.7fr;
  gap: 5vw;
  padding-block: 142px;
  border-bottom: 1px solid var(--line);
}

.intro h2,
.section-heading h2,
.method h2,
.principles h2,
.contact h2 {
  margin: 0;
  font: 600 clamp(36px, 4.2vw, 62px)/1.16 var(--sans);
  letter-spacing: -0.065em;
}

.intro-note {
  align-self: end;
  border-left: 1px solid var(--espresso);
  padding-left: 28px;
}

.intro-note p {
  margin: 0 0 28px;
  color: rgba(33, 25, 20, 0.72);
  font-size: 14px;
  line-height: 1.9;
}

.intro-note a {
  display: inline-flex;
  align-items: center;
  gap: 22px;
  padding-bottom: 7px;
  border-bottom: 1px solid var(--espresso);
  font: 700 12px/1 var(--mono);
}

.services {
  padding-block: 130px 150px;
}

.section-heading {
  display: grid;
  grid-template-columns: 0.55fr 1.05fr 0.65fr;
  align-items: end;
  gap: 5vw;
  margin-bottom: 68px;
}

.section-heading > p {
  margin: 0;
  color: rgba(33, 25, 20, 0.7);
  font-size: 14px;
  line-height: 1.85;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.service-card {
  position: relative;
  min-height: 520px;
  display: flex;
  flex-direction: column;
  padding: 26px;
  overflow: hidden;
  border: 1px solid var(--espresso);
  background: var(--paper);
  transition: transform 260ms ease, box-shadow 260ms ease;
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: 12px 12px 0 var(--sand-deep);
}

.service-card::after {
  content: "";
  position: absolute;
  right: -42px;
  top: -42px;
  width: 120px;
  height: 120px;
  border: 1px solid currentColor;
  border-radius: 50%;
  opacity: 0.25;
}

.service-card--blue {
  background: var(--blue);
  color: var(--white);
}

.service-card--dark {
  background: var(--espresso);
  color: var(--white);
}

.card-number {
  padding-bottom: 18px;
  border-bottom: 1px solid currentColor;
  opacity: 0.7;
  font: 700 11px/1 var(--mono);
}

.service-icon {
  width: 106px;
  height: 106px;
  position: relative;
  margin: 42px 0 55px;
  border: 1px solid currentColor;
  border-radius: 50%;
}

.service-icon span {
  position: absolute;
  inset: 50% auto auto 50%;
  width: 8px;
  height: 8px;
  background: currentColor;
  border-radius: 50%;
}

.service-icon span:nth-child(1) { transform: translate(-30px, -4px); }
.service-icon span:nth-child(2) { transform: translate(-4px, -4px); }
.service-icon span:nth-child(3) { transform: translate(22px, -4px); }

.service-icon::before,
.service-icon::after {
  content: "";
  position: absolute;
  inset: 50% 12px auto;
  border-top: 1px solid currentColor;
}

.service-icon::after {
  inset: 12px 50% 12px auto;
  border: 0;
  border-left: 1px solid currentColor;
}

.service-icon--frame {
  border-radius: 0;
  transform: rotate(45deg) scale(0.75);
}

.service-icon--frame span {
  width: 42px;
  height: 42px;
  border: 1px solid currentColor;
  border-radius: 0;
  background: transparent;
}

.service-icon--frame span:nth-child(1) { transform: translate(-36px, -36px); }
.service-icon--frame span:nth-child(2) { transform: translate(-6px, -6px); background: var(--blue); border-color: var(--blue); }

.service-icon--pulse {
  border-radius: 0;
  border-width: 0 0 1px;
}

.service-icon--pulse::before,
.service-icon--pulse::after {
  display: none;
}

.service-icon--pulse span {
  bottom: 0;
  top: auto;
  width: 10px;
  border-radius: 0;
  background: var(--blue);
}

.service-icon--pulse span:nth-child(1) { height: 28px; transform: translate(-45px, 0); }
.service-icon--pulse span:nth-child(2) { height: 72px; transform: translate(-20px, 0); }
.service-icon--pulse span:nth-child(3) { height: 46px; transform: translate(5px, 0); }
.service-icon--pulse span:nth-child(4) { height: 96px; transform: translate(30px, 0); }

.service-card h3 {
  margin: 0 0 15px;
  font-size: 26px;
  letter-spacing: -0.04em;
}

.service-card > p {
  min-height: 82px;
  margin: 0;
  color: currentColor;
  opacity: 0.72;
  font-size: 14px;
  line-height: 1.85;
}

.service-card ul {
  margin: auto 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid currentColor;
}

.service-card li {
  padding: 12px 0;
  border-bottom: 1px solid currentColor;
  opacity: 0.78;
  font: 600 11px/1 var(--mono);
}

.method {
  position: relative;
  overflow: hidden;
  background: var(--espresso);
  color: var(--white);
}

.method::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.12;
  background-image: radial-gradient(#fff 0.7px, transparent 0.7px);
  background-size: 16px 16px;
}

.method-shape {
  position: absolute;
  width: 580px;
  height: 580px;
  left: -240px;
  bottom: -330px;
  border: 1px solid rgba(255, 255, 255, 0.32);
  border-radius: 50%;
  box-shadow: 0 0 0 90px rgba(18, 73, 219, 0.14), 0 0 0 180px rgba(18, 73, 219, 0.08);
}

.method-inner {
  position: relative;
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 9vw;
  padding-block: 140px;
}

.method-intro {
  position: sticky;
  top: 130px;
  align-self: start;
}

.method .section-code {
  color: #88a8ff;
}

.method .kicker {
  margin-top: 28px;
  color: rgba(255,255,255,0.64);
}

.method-intro > p:last-child {
  max-width: 430px;
  margin: 32px 0 0;
  color: rgba(255,255,255,0.62);
  font-size: 14px;
  line-height: 1.9;
}

.method-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(255,255,255,0.34);
}

.method-list li {
  display: grid;
  grid-template-columns: 62px 1fr auto;
  gap: 22px;
  align-items: center;
  min-height: 150px;
  border-bottom: 1px solid rgba(255,255,255,0.34);
}

.method-number {
  color: #88a8ff;
  font: 700 12px/1 var(--mono);
}

.method-list h3 {
  margin: 0 0 13px;
  font-size: 22px;
  letter-spacing: -0.03em;
}

.method-list p {
  margin: 0;
  color: rgba(255,255,255,0.6);
  font-size: 13px;
  line-height: 1.7;
}

.method-tag {
  padding: 8px 10px;
  border: 1px solid rgba(255,255,255,0.42);
  color: rgba(255,255,255,0.8);
  font: 700 10px/1 var(--mono);
}

.principles {
  padding-block: 140px;
}

.principles-title {
  display: grid;
  grid-template-columns: 0.35fr 0.7fr 1.3fr;
  align-items: end;
  gap: 3vw;
  margin-bottom: 70px;
}

.principles-title .kicker {
  margin-bottom: 8px;
}

.principle-board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--espresso);
  background-color: var(--paper);
  background-image: linear-gradient(rgba(33,25,20,0.045) 1px, transparent 1px), linear-gradient(90deg, rgba(33,25,20,0.045) 1px, transparent 1px);
  background-size: 24px 24px;
}

.principle-board article {
  min-height: 330px;
  display: flex;
  flex-direction: column;
  padding: 28px;
}

.principle-board article + article {
  border-left: 1px solid var(--espresso);
}

.principle-board article > span {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid var(--espresso);
  background: var(--sand-light);
  font: 700 11px/1 var(--mono);
}

.principle-board h3 {
  margin: auto 0 15px;
  font-size: 23px;
}

.principle-board p {
  max-width: 320px;
  margin: 0;
  color: rgba(33, 25, 20, 0.67);
  font-size: 13px;
  line-height: 1.8;
}

.contact {
  padding-bottom: 88px;
}

.contact-panel {
  position: relative;
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 8vw;
  padding: 70px;
  overflow: hidden;
  background: var(--blue);
  color: var(--white);
  box-shadow: 18px 18px 0 var(--espresso);
}

.contact-panel::before {
  content: "";
  position: absolute;
  width: 350px;
  height: 350px;
  left: -200px;
  top: -210px;
  border: 1px solid rgba(255,255,255,0.32);
  border-radius: 50%;
  box-shadow: 0 0 0 54px rgba(255,255,255,0.06);
}

.contact .section-code {
  color: rgba(255,255,255,0.72);
}

.contact .kicker {
  margin-top: 30px;
  color: rgba(255,255,255,0.72);
}

.contact-copy > p:last-child {
  max-width: 450px;
  margin: 30px 0 0;
  color: rgba(255,255,255,0.74);
  font-size: 14px;
  line-height: 1.85;
}

.need-builder {
  align-self: end;
}

.need-label {
  margin: 0 0 16px;
  font: 700 11px/1 var(--mono);
  letter-spacing: 0.12em;
}

.need-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border: 1px solid rgba(255,255,255,0.8);
}

.need-option {
  min-height: 66px;
  border: 0;
  border-right: 1px solid rgba(255,255,255,0.8);
  border-bottom: 1px solid rgba(255,255,255,0.8);
  background: transparent;
  color: var(--white);
  cursor: pointer;
  font: 700 12px/1 var(--mono);
  transition: background-color 160ms ease, color 160ms ease;
}

.need-option:nth-child(2n) { border-right: 0; }
.need-option:nth-child(n+3) { border-bottom: 0; }

.need-option:hover,
.need-option[aria-pressed="true"] {
  background: var(--white);
  color: var(--blue-deep);
}

.need-option[aria-pressed="true"]::before {
  content: "✓ ";
}

.need-result {
  min-height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-top: 18px;
}

.need-result > span {
  color: rgba(255,255,255,0.72);
  font: 600 11px/1.5 var(--mono);
}

.button--light {
  min-width: 190px;
  border-color: var(--white);
  background: var(--white);
  color: var(--blue-deep);
}

.button--light:hover {
  background: var(--espresso);
  border-color: var(--espresso);
  color: var(--white);
}

.need-message {
  margin: 0;
  padding: 14px 16px;
  border-left: 3px solid var(--white);
  background: rgba(0,0,0,0.14);
  font-size: 13px;
  line-height: 1.7;
}

.contact-end {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 55px;
  color: rgba(33,25,20,0.55);
  font: 700 10px/1 var(--mono);
  letter-spacing: 0.18em;
}

.contact-end i {
  width: 28px;
  border-top: 1px solid var(--line);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 700ms cubic-bezier(.2,.7,.2,1), transform 700ms cubic-bezier(.2,.7,.2,1);
}

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

@media (max-width: 1080px) {
  .brand { width: auto; min-width: 330px; flex: 1; }
  .site-nav a { min-width: 88px; padding-inline: 14px; }
  .site-nav .nav-cta { min-width: 142px; gap: 18px; }

  .hero {
    grid-template-columns: minmax(0, 0.82fr) minmax(440px, 1fr);
    column-gap: 2vw;
  }

  .hero h1 { font-size: clamp(46px, 5.4vw, 64px); }
  .hero-poster { transform: scale(0.9); transform-origin: center; }

  .section-heading {
    grid-template-columns: 0.45fr 1.2fr;
  }

  .section-heading > p {
    grid-column: 2;
    max-width: 480px;
  }

  .principles-title {
    grid-template-columns: 0.4fr 0.8fr 1.2fr;
  }

  .contact-panel {
    padding: 56px;
    gap: 5vw;
  }
}

@media (max-width: 820px) {
  html { scroll-padding-top: 68px; }

  .site-header { height: 68px; }
  .brand { min-width: 0; padding: 0 20px; border-right: 0; }
  .brand-name { font-size: 13px; }
  .brand-name span { display: none; }
  .brand-mark { width: 27px; height: 27px; }

  .menu-toggle {
    position: relative;
    z-index: 2;
    width: 78px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 6px;
    border: 0;
    border-left: 1px solid var(--line);
    background: transparent;
    cursor: pointer;
  }

  .menu-toggle__label {
    font: 700 9px/1 var(--mono);
    letter-spacing: 0.12em;
  }

  .menu-toggle__icon {
    position: relative;
    width: 24px;
    height: 8px;
  }

  .menu-toggle__icon i {
    position: absolute;
    left: 0;
    width: 24px;
    border-top: 1px solid currentColor;
    transition: transform 180ms ease, top 180ms ease;
  }

  .menu-toggle__icon i:first-child { top: 0; }
  .menu-toggle__icon i:last-child { top: 7px; }
  .menu-toggle[aria-expanded="true"] .menu-toggle__icon i:first-child { top: 4px; transform: rotate(45deg); }
  .menu-toggle[aria-expanded="true"] .menu-toggle__icon i:last-child { top: 4px; transform: rotate(-45deg); }

  .site-nav {
    position: fixed;
    inset: 68px 0 auto;
    height: calc(100svh - 68px);
    display: flex;
    flex-direction: column;
    align-items: stretch;
    padding: 28px 20px;
    background: var(--sand-light);
    transform: translateX(100%);
    visibility: hidden;
    transition: transform 260ms ease, visibility 260ms;
  }

  .site-nav.is-open {
    transform: translateX(0);
    visibility: visible;
  }

  .site-nav a,
  .site-nav a:not(.nav-cta) {
    min-height: 68px;
    display: flex;
    justify-content: flex-start;
    border: 0;
    border-bottom: 1px solid var(--line);
    font-size: 14px;
  }

  .site-nav .nav-cta {
    min-height: 68px;
    justify-content: space-between;
    margin-top: auto;
    border: 0;
  }

  .hero {
    height: auto;
    min-height: 0;
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    padding: 128px 6vw 34px;
    row-gap: 66px;
  }

  .hero::before { display: none; }
  .hero-grid { inset: 68px 0 0; }
  .hero-copy { padding-top: 0; }
  .hero h1 { font-size: clamp(42px, 11vw, 70px); }
  .hero-copy > p { max-width: 620px; }

  .hero-poster {
    width: min(500px, 88vw);
    height: 540px;
    margin: 0 auto;
    transform: none;
  }

  .hero-meta { grid-column: 1; }

  .section-shell { width: min(calc(100% - 12vw), var(--max)); }

  .intro {
    grid-template-columns: 0.3fr 1.4fr;
    gap: 5vw;
    padding-block: 100px;
  }

  .intro-note { grid-column: 2; margin-top: 35px; }

  .services { padding-block: 100px; }

  .section-heading {
    grid-template-columns: 1fr;
    gap: 30px;
    margin-bottom: 48px;
  }

  .section-heading > p { grid-column: auto; max-width: 520px; }

  .service-grid {
    grid-template-columns: 1fr;
  }

  .service-card { min-height: 440px; }
  .service-icon { margin-block: 30px 38px; }

  .method-inner {
    grid-template-columns: 1fr;
    gap: 70px;
    padding-block: 105px;
  }

  .method-intro { position: relative; top: auto; }

  .principles { padding-block: 105px; }
  .principles-title { grid-template-columns: 1fr; gap: 22px; }
  .principles-title .kicker { margin: 0; }

  .principle-board { grid-template-columns: 1fr; }
  .principle-board article { min-height: 240px; }
  .principle-board article + article { border-left: 0; border-top: 1px solid var(--espresso); }

  .contact-panel { grid-template-columns: 1fr; gap: 64px; padding: 54px 42px; }
}

@media (max-width: 520px) {
  .site-header { height: 62px; }
  .site-nav { top: 62px; height: calc(100svh - 62px); }
  .brand { padding-inline: 16px; }

  .hero {
    padding: 112px 20px 28px;
    row-gap: 52px;
  }

  .eyebrow { margin-bottom: 26px; }
  .hero h1 { font-size: clamp(38px, 11.5vw, 54px); line-height: 1.13; }
  .hero h1 em::after { height: 5px; bottom: -7px; }
  .hero-copy > p { margin-top: 32px; font-size: 14px; }
  .hero-actions { align-items: stretch; flex-direction: column; gap: 20px; }
  .button--primary { width: 100%; }
  .button--text { align-self: flex-start; }

  .hero-poster {
    width: calc(100vw - 40px);
    height: 460px;
  }

  .poster-card--back { inset: 6px 42px 26px 4px; }
  .poster-card--main { inset: 28px 2px 4px 24px; padding: 20px; }
  .poster-index { font-size: 46px; }
  .poster-flow li { min-height: 54px; }
  .poster-flow li strong { font-size: 17px; }
  .poster-stamp { width: 74px; height: 74px; right: 26px; top: 122px; }
  .poster-stamp::after { top: 33px; }
  .poster-stamp i { transform: translateY(-17px); }
  .poster-note { right: -3px; bottom: 25px; width: 130px; padding: 13px; box-shadow: 6px 6px 0 var(--espresso); }

  .hero-meta { gap: 10px; justify-content: space-between; }
  .hero-meta span { font-size: 9px; letter-spacing: 0.08em; }

  .section-shell { width: calc(100% - 40px); }
  .intro { grid-template-columns: 1fr; padding-block: 82px; }
  .intro .section-code { margin-bottom: 20px; }
  .intro-note { grid-column: auto; margin-top: 14px; }

  .intro h2,
  .section-heading h2,
  .method h2,
  .principles h2,
  .contact h2 { font-size: clamp(34px, 10vw, 48px); }

  .services { padding-block: 82px; }
  .service-card { min-height: 430px; padding: 22px; }
  .service-card h3 { font-size: 23px; }

  .method-inner { padding-block: 84px; gap: 54px; }
  .method-list li { grid-template-columns: 38px 1fr; gap: 14px; min-height: 156px; }
  .method-tag { display: none; }
  .method-list h3 { font-size: 20px; }

  .principles { padding-block: 84px; }
  .principles-title { margin-bottom: 46px; }
  .principle-board article { min-height: 250px; padding: 22px; }

  .contact { width: 100%; padding: 0 20px 65px; }
  .contact-panel { gap: 50px; padding: 42px 22px; box-shadow: 9px 9px 0 var(--espresso); }
  .need-options { grid-template-columns: 1fr; }
  .need-option,
  .need-option:nth-child(2n),
  .need-option:nth-child(n+3) { border: 0; border-bottom: 1px solid rgba(255,255,255,0.8); }
  .need-option:last-child { border-bottom: 0; }
  .need-result { align-items: stretch; flex-direction: column; padding-top: 22px; }
  .button--light { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  [data-depth] { transform: none !important; }
}