:root {
  --paper: #fbf7ef;
  --paper-strong: #fffdf8;
  --ink: #16211f;
  --ink-soft: #52615c;
  --line: rgba(22, 33, 31, 0.14);
  --green: #4f8f3a;
  --green-deep: #22634b;
  --cyan: #25d8cf;
  --amber: #d39b34;
  --coral: #d97755;
  --rose: #c84f82;
  --night: #071312;
  --shadow: 0 24px 70px rgba(31, 42, 39, 0.12);
  --mx: 0;
  --my: 0;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial,
    sans-serif;
  line-height: 1.65;
  overflow-x: hidden;
}

body.has-custom-cursor,
body.has-custom-cursor a,
body.has-custom-cursor button {
  cursor: none;
}

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

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 76px;
  padding: 0 40px;
  color: rgba(255, 253, 248, 0.92);
  background: rgba(5, 14, 15, 0.5);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(18px);
  transition:
    background 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease;
}

.site-header[data-scrolled="true"] {
  background: rgba(5, 14, 15, 0.88);
  border-bottom-color: rgba(37, 216, 207, 0.18);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 180px;
}

.brand-mark {
  position: relative;
  flex: 0 0 34px;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(255, 253, 248, 0.3);
  border-radius: 50%;
  background: rgba(255, 253, 248, 0.9);
}

.brand-mark span {
  position: absolute;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  mix-blend-mode: multiply;
}

.brand-mark span:nth-child(1) {
  left: 6px;
  top: 5px;
  background: rgba(79, 143, 58, 0.78);
}

.brand-mark span:nth-child(2) {
  right: 5px;
  top: 10px;
  background: rgba(31, 159, 176, 0.7);
}

.brand-mark span:nth-child(3) {
  left: 11px;
  bottom: 5px;
  background: rgba(209, 144, 31, 0.76);
}

.brand strong,
.site-footer strong {
  display: block;
  font-weight: 800;
  line-height: 1.08;
}

.brand small {
  display: block;
  margin-top: 1px;
  color: rgba(255, 253, 248, 0.64);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  line-height: 1.1;
}

.desktop-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  color: rgba(255, 253, 248, 0.72);
  font-size: 0.94rem;
}

.desktop-nav a:hover {
  color: #fffdf8 !important;
}

.nav-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border: 1px solid rgba(255, 253, 248, 0.2);
  border-radius: 8px;
  padding: 0 18px;
  font-weight: 800;
  line-height: 1;
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    background 160ms ease;
}

.nav-cta,
.button.primary {
  color: #03110f;
  background: var(--cyan);
  border-color: transparent;
}

.button.ghost {
  color: #fffdf8;
  background: rgba(255, 253, 248, 0.1);
}

.button:hover,
.nav-cta:hover {
  transform: translateY(-2px);
}

.button.full {
  width: 100%;
}

.menu-button {
  display: none;
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 253, 248, 0.24);
  border-radius: 8px;
  background: rgba(255, 253, 248, 0.1);
}

.menu-button span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: #fffdf8;
}

.mobile-nav {
  position: fixed;
  top: 76px;
  left: 12px;
  right: 12px;
  z-index: 49;
  padding: 10px;
  border: 1px solid rgba(255, 253, 248, 0.16);
  border-radius: 8px;
  background: rgba(5, 14, 15, 0.96);
  box-shadow: var(--shadow);
}

.mobile-nav a {
  display: block;
  padding: 14px 12px;
  color: rgba(255, 253, 248, 0.76);
  border-radius: 6px;
}

.mobile-nav a:hover {
  color: #fffdf8;
  background: rgba(37, 216, 207, 0.12);
}

.hero {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  display: grid;
  align-items: center;
  padding: 128px 40px 68px;
  background: var(--night);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url("assets/sansheng-bg.png");
  background-position:
    calc(50% + var(--mx) * 20px)
    calc(50% + var(--my) * 14px);
  background-size: cover;
  filter: brightness(1.18) saturate(1.12) contrast(1.02);
  transform: scale(1.035);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(3, 9, 10, 0.88) 0%, rgba(5, 16, 17, 0.72) 42%, rgba(5, 16, 17, 0.32) 73%, rgba(5, 16, 17, 0.08) 100%),
    linear-gradient(180deg, rgba(3, 9, 10, 0.42) 0%, rgba(3, 9, 10, 0.02) 44%, rgba(3, 9, 10, 0.68) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(1160px, 100%);
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--green-deep);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: var(--cyan);
}

.hero h1 {
  margin: 0;
  color: #fffdf8;
  width: min(760px, 100%);
  font-size: clamp(2.95rem, 4.72vw, 5.25rem);
  line-height: 1.04;
  font-weight: 900;
}

.hero-title span {
  display: block;
}

.hero-title span:nth-child(2) {
  margin-left: clamp(28px, 6vw, 104px);
  font-size: 0.92em;
}

.hero-title span:nth-child(3) {
  margin-left: clamp(6px, 2.8vw, 44px);
  font-size: 0.96em;
}

.hero-title em {
  color: transparent;
  font-style: normal;
  background: linear-gradient(90deg, #fffdf8, #82d7bd 42%, #5aa4ff 72%, #efaa48);
  background-clip: text;
  -webkit-background-clip: text;
  text-shadow: none;
}

.hero-manifesto {
  width: min(900px, 100%);
  margin-top: 26px;
  padding: 0;
  color: rgba(255, 253, 248, 0.84);
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  backdrop-filter: none;
}

.hero-manifesto p {
  margin: 0 0 14px;
  width: min(840px, 100%);
  font-size: clamp(0.98rem, 1.08vw, 1.12rem);
  line-height: 1.72;
  text-shadow: 0 18px 34px rgba(0, 0, 0, 0.6);
}

.hero-manifesto p:last-child {
  margin-bottom: 0;
}

.hero-closing {
  color: #fffdf8;
  font-size: clamp(1.24rem, 1.6vw, 1.58rem) !important;
  font-weight: 850;
}

.hero-lede {
  width: min(820px, 100%);
  margin: 26px 0 0;
  color: rgba(255, 253, 248, 0.82);
  font-size: 1.1rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.build-note {
  width: min(760px, 100%);
  margin: 18px 0 0;
  color: rgba(255, 253, 248, 0.58);
  font-size: 0.92rem;
}

.cursor-orb {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 999;
  width: 34px;
  height: 34px;
  opacity: 0;
  pointer-events: none;
  mix-blend-mode: normal;
  transform: translate(-50%, -50%);
  filter: drop-shadow(0 0 14px rgba(111, 231, 210, 0.42));
  transition:
    opacity 160ms ease,
    scale 160ms ease,
    filter 160ms ease;
}

.cursor-orb.is-visible {
  opacity: 0.86;
}

.cursor-loop,
.cursor-core {
  position: absolute;
  left: 50%;
  top: 50%;
}

.cursor-loop {
  width: 14px;
  height: 23px;
  border: 2px solid currentColor;
  border-radius: 999px;
  mix-blend-mode: screen;
  transform-origin: 50% 64%;
  opacity: 0.84;
  box-shadow: 0 0 10px currentColor;
}

.cursor-loop.green {
  color: #88f0a4;
  transform: translate(-50%, -66%) rotate(0deg);
}

.cursor-loop.blue {
  color: #67c5ff;
  transform: translate(-31%, -43%) rotate(118deg);
}

.cursor-loop.orange {
  color: #f0b35a;
  transform: translate(-69%, -43%) rotate(-118deg);
}

.cursor-core {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #fffdf8;
  box-shadow:
    0 0 12px rgba(255, 253, 248, 0.88),
    0 0 26px rgba(37, 216, 207, 0.36);
  transform: translate(-50%, -50%);
}

.cursor-orb.is-active {
  scale: 1.28;
  filter: drop-shadow(0 0 20px rgba(239, 165, 70, 0.48));
}

.cinema-section {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  display: grid;
  align-items: center;
  padding: 96px 40px;
  color: #fffdf8;
  background: #030909;
}

.cinema-section::before {
  content: "";
  position: absolute;
  inset: -8%;
  background:
    radial-gradient(circle at calc(52% + var(--mx) * 18%) calc(40% + var(--my) * 12%), rgba(37, 216, 207, 0.22), transparent 28%),
    radial-gradient(circle at 82% 62%, rgba(200, 79, 130, 0.14), transparent 28%),
    url("assets/sansheng-hero-cyber.png") center / cover;
  filter: saturate(1.22) contrast(1.08);
  opacity: 0.52;
  transform: scale(1.05);
}

.cinema-section::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(3, 9, 9, 0.98) 0%, rgba(3, 9, 9, 0.56) 52%, rgba(3, 9, 9, 0.94) 100%),
    linear-gradient(180deg, rgba(3, 9, 9, 0.92), rgba(3, 9, 9, 0.18) 48%, rgba(3, 9, 9, 0.96));
}

.cinema-stage {
  --scene: var(--cyan);
  --scene-rgb: 37, 216, 207;
  position: relative;
  z-index: 1;
  width: min(1260px, 100%);
  min-height: 700px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(320px, 0.9fr) minmax(430px, 1.1fr);
  gap: 44px;
  align-items: center;
}

.cinema-stage[data-scene="companion"] {
  --scene: var(--rose);
  --scene-rgb: 200, 79, 130;
}

.cinema-stage[data-scene="sage"] {
  --scene: #82d7bd;
  --scene-rgb: 130, 215, 189;
}

.cinema-stage[data-scene="species"] {
  --scene: #d8b04a;
  --scene-rgb: 216, 176, 74;
}

.cinema-copy {
  position: relative;
  z-index: 2;
}

.cinema-copy .section-kicker {
  color: var(--scene);
}

.cinema-copy h2 {
  margin: 0;
  color: #fffdf8;
  font-size: clamp(3rem, 6vw, 6.6rem);
  line-height: 0.98;
  white-space: pre-line;
}

.cinema-copy p:not(.section-kicker) {
  width: min(620px, 100%);
  margin: 28px 0 0;
  color: rgba(255, 253, 248, 0.76);
  font-size: clamp(1.04rem, 1.25vw, 1.24rem);
}

.cinema-status {
  width: min(600px, 100%);
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 253, 248, 0.2);
  color: rgba(255, 253, 248, 0.62);
  font-size: 0.95rem;
}

.cinema-visual {
  position: relative;
  min-height: 610px;
  perspective: 1100px;
  transform-style: preserve-3d;
}

.scan-grid {
  position: absolute;
  inset: 8% 0 6%;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(circle at 52% 48%, #000 0 40%, transparent 72%);
  opacity: 0.56;
}

.life-silhouette {
  position: absolute;
  left: 50%;
  top: 50%;
  width: min(58vw, 470px);
  height: min(62vw, 560px);
  border: 1px solid rgba(var(--scene-rgb), 0.42);
  border-radius: 44% 56% 50% 48% / 34% 44% 56% 64%;
  background:
    radial-gradient(circle at 50% 42%, rgba(var(--scene-rgb), 0.2), transparent 22%),
    linear-gradient(135deg, rgba(var(--scene-rgb), 0.26), rgba(255, 255, 255, 0.04) 46%, rgba(4, 14, 15, 0.36));
  box-shadow:
    inset 0 0 90px rgba(var(--scene-rgb), 0.18),
    0 0 90px rgba(var(--scene-rgb), 0.16);
  transform: translate(-50%, -50%) rotateX(calc(var(--my) * 6deg)) rotateY(calc(var(--mx) * -10deg));
  transition:
    border-color 260ms ease,
    background 260ms ease,
    box-shadow 260ms ease;
}

.life-silhouette::before,
.life-silhouette::after {
  content: "";
  position: absolute;
  border: 1px solid rgba(var(--scene-rgb), 0.24);
  border-radius: inherit;
}

.life-silhouette::before {
  inset: 10%;
  transform: rotate(16deg);
}

.life-silhouette::after {
  inset: 23%;
  transform: rotate(-22deg);
}

.life-core {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background:
    radial-gradient(circle, #fffdf8 0 7%, var(--scene) 8% 16%, rgba(3, 12, 12, 0.82) 17% 100%);
  box-shadow:
    0 0 46px rgba(var(--scene-rgb), 0.66),
    0 0 120px rgba(var(--scene-rgb), 0.26);
  transform: translate(-50%, -50%) translateZ(60px);
}

.orbit {
  position: absolute;
  left: 50%;
  top: 50%;
  border: 1px solid rgba(var(--scene-rgb), 0.24);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.orbit-one {
  width: 240px;
  height: 240px;
  animation: orbitDrift 18s linear infinite;
}

.orbit-two {
  width: 380px;
  height: 380px;
  animation: orbitDrift 24s linear infinite reverse;
}

.orbit-three {
  width: 540px;
  height: 540px;
  animation: orbitDrift 30s linear infinite;
}

.particle {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--scene);
  box-shadow: 0 0 28px rgba(var(--scene-rgb), 0.72);
}

.particle-a {
  left: 24%;
  top: 34%;
}

.particle-b {
  left: 72%;
  top: 28%;
}

.particle-c {
  left: 28%;
  top: 72%;
}

.particle-d {
  left: 78%;
  top: 66%;
}

.cinema-controls {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 16px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  border-top: 1px solid rgba(255, 253, 248, 0.18);
}

.scene-option {
  min-height: 64px;
  border: 0;
  border-left: 1px solid rgba(255, 253, 248, 0.12);
  color: rgba(255, 253, 248, 0.62);
  background: transparent;
  font-weight: 900;
  transition:
    color 180ms ease,
    background 180ms ease;
}

.scene-option:first-child {
  border-left: 0;
}

.scene-option:hover,
.scene-option.active {
  color: #fffdf8;
  background: rgba(var(--scene-rgb), 0.12);
}

@keyframes orbitDrift {
  from {
    rotate: 0deg;
  }
  to {
    rotate: 360deg;
  }
}

.section {
  padding: 104px 40px;
}

.section-heading,
.century-layout,
.join {
  width: min(1120px, 100%);
  margin: 0 auto 44px;
  display: grid;
  grid-template-columns: minmax(260px, 0.9fr) minmax(0, 1.1fr);
  gap: 70px;
  align-items: start;
}

.section-heading.narrow {
  display: block;
  width: min(860px, 100%);
  text-align: center;
}

.section h2,
.roadmap h2,
.join h2,
.century h2,
.prototype-hero h1 {
  margin: 0;
  color: var(--ink);
  font-size: 3rem;
  line-height: 1.12;
}

.section-heading p,
.roadmap-intro p,
.join p,
.century blockquote,
.prototype-hero p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.08rem;
}

.card-grid {
  width: min(1120px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 18px;
}

.card-grid.four {
  grid-template-columns: repeat(4, 1fr);
}

.card-grid.three,
.life-flow {
  grid-template-columns: repeat(3, 1fr);
}

.card-grid article,
.life-flow article,
.join-form {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 253, 248, 0.86);
  box-shadow: 0 18px 50px rgba(34, 44, 40, 0.07);
}

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

.card-grid span {
  display: block;
  color: var(--coral);
  font-size: 0.82rem;
  font-weight: 900;
}

.card-grid h3,
.life-flow b {
  margin: 12px 0 8px;
  font-size: 1.28rem;
  line-height: 1.25;
}

.card-grid p,
.life-flow p {
  margin: 0;
  color: var(--ink-soft);
}

.cores {
  background: #edf4f0;
}

.core-card {
  min-height: 270px;
}

.core-symbol {
  display: inline-flex !important;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 8px;
  font-size: 1.38rem !important;
}

.card-grid .core-symbol {
  color: #fffdf8;
}

.core-card.mirror .core-symbol {
  background: #4f8fe8;
}

.core-card.companion .core-symbol {
  background: #e19a35;
}

.core-card.sage .core-symbol {
  background: #5cae73;
}

.life {
  color: #fff;
  background:
    linear-gradient(135deg, rgba(7, 17, 15, 0.96), rgba(14, 37, 30, 0.96)),
    url("assets/sansheng-hero-cyber.png") center / cover;
}

.life h2,
.life .section-kicker {
  color: #fffdf8;
}

.life .section-heading p {
  color: rgba(255, 253, 248, 0.72);
}

.life-flow {
  width: min(1120px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 18px;
}

.life-flow article {
  padding: 28px;
  border-color: rgba(255, 253, 248, 0.16);
  background: rgba(255, 253, 248, 0.08);
  box-shadow: none;
}

.life-flow b {
  display: block;
  color: var(--cyan);
}

.life-flow p {
  color: rgba(255, 253, 248, 0.74);
}

.prototype-link {
  background: #fffdf8;
}

.prototype-button {
  width: min(1120px, 100%);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(90deg, rgba(37, 216, 207, 0.12), rgba(79, 143, 58, 0.08)),
    #fffdf8;
  box-shadow: var(--shadow);
}

.prototype-button span {
  font-size: 1.4rem;
  font-weight: 900;
}

.prototype-button small {
  color: var(--ink-soft);
}

.roadmap {
  padding: 104px 40px;
  color: #fffdf8;
  background: #071312;
}

.roadmap-intro {
  width: min(860px, 100%);
  margin: 0 auto 42px;
  text-align: center;
}

.roadmap .section-kicker {
  color: var(--cyan);
}

.roadmap h2,
.roadmap h3 {
  color: #fffdf8;
}

.roadmap .card-grid article {
  border-color: rgba(255, 253, 248, 0.14);
  background: rgba(255, 253, 248, 0.06);
  box-shadow: none;
}

.roadmap .card-grid p,
.roadmap-intro p {
  color: rgba(255, 253, 248, 0.7);
}

.century {
  color: #fffdf8;
  background:
    radial-gradient(circle at 84% 8%, rgba(37, 216, 207, 0.18), transparent 34%),
    linear-gradient(135deg, #071312 0%, #10231f 48%, #071312 100%);
}

.century h2,
.century .section-kicker {
  color: #fffdf8;
}

.century blockquote {
  color: rgba(255, 253, 248, 0.82);
}

.century blockquote p {
  margin: 0 0 18px;
}

.century strong {
  color: #fffdf8;
}

.join {
  padding: 104px 40px;
  margin-bottom: 0;
}

.join-form {
  padding: 26px;
}

.join-form label {
  display: block;
  margin-bottom: 16px;
}

.join-form span {
  display: block;
  margin-bottom: 7px;
  color: var(--ink-soft);
  font-size: 0.9rem;
  font-weight: 800;
}

.join-form input,
.join-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 13px;
  color: var(--ink);
  background: #fffdf8;
  outline: none;
  resize: vertical;
}

.join-form input:focus,
.join-form textarea:focus {
  border-color: rgba(37, 216, 207, 0.72);
  box-shadow: 0 0 0 4px rgba(37, 216, 207, 0.12);
}

.form-note {
  min-height: 42px;
  margin: 14px 0 0;
  color: var(--ink-soft);
  font-size: 0.86rem;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 36px 40px;
  color: rgba(255, 253, 248, 0.76);
  background: #101815;
}

.site-footer p {
  margin: 4px 0 0;
}

.footer-links {
  display: flex;
  gap: 18px;
}

.prototype-page {
  background: #f7f8fb;
}

.prototype-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 40px;
  background: #071312;
  color: #fffdf8;
}

.prototype-main {
  padding: 70px 40px;
}

.prototype-hero,
.prototype-gallery {
  width: min(1180px, 100%);
  margin: 0 auto;
}

.prototype-hero p {
  width: min(720px, 100%);
  margin-top: 18px;
}

.prototype-gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
  margin-top: 42px;
}

.prototype-gallery figure {
  margin: 0;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.prototype-gallery img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 6px;
}

.prototype-gallery figcaption {
  padding: 12px 4px 2px;
  color: var(--ink-soft);
}

@media (max-width: 1040px) {
  .desktop-nav,
  .nav-cta {
    display: none;
  }

  .site-header {
    gap: 12px;
  }

  .menu-button {
    display: block;
  }

  .section-heading,
  .century-layout,
  .join {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .card-grid.four,
  .card-grid.three,
  .life-flow,
  .prototype-gallery {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 720px) {
  .site-header {
    height: 68px;
    padding: 0 18px;
  }

  .brand {
    min-width: 0;
  }

  .brand small {
    display: none;
  }

  .mobile-nav {
    top: 68px;
  }

  .hero {
    min-height: auto;
    padding: 106px 20px 56px;
  }

  .hero h1 {
    font-size: 2.54rem;
  }

  .hero-title span:nth-child(2),
  .hero-title span:nth-child(3) {
    margin-left: 0;
  }

  .hero-manifesto {
    margin-top: 22px;
  }

  .hero-manifesto p {
    font-size: 0.96rem;
  }

  .hero-closing {
    font-size: 1.04rem !important;
  }

  .hero-lede {
    font-size: 1.04rem;
  }

  .hero-actions .button {
    width: 100%;
  }

  .section,
  .roadmap,
  .join,
  .prototype-main {
    padding: 76px 20px;
  }

  .section h2,
  .roadmap h2,
  .join h2,
  .century h2,
  .prototype-hero h1 {
    font-size: 2.2rem;
  }

  .card-grid.four,
  .card-grid.three,
  .life-flow,
  .prototype-gallery {
    grid-template-columns: 1fr;
  }

  .prototype-header,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    padding: 26px 20px;
  }
}

@media (max-width: 420px) {
  .hero h1 {
    font-size: 2.3rem;
  }
}