@property --p {
  syntax: "<number>";
  inherits: true;
  initial-value: 0.14;
}

:root {
  --ink: #0c0d13;
  --ink-soft: #12141d;
  --ink-raised: #181a24;
  --paper: #f0eadf;
  --paper-deep: #e6ddcc;
  --paper-line: rgba(25, 22, 17, 0.16);
  --text: #f4efe5;
  --text-dim: #b4afa4;
  --text-faint: #7d7971;
  --ink-text: #191611;
  --ink-text-dim: #5f594f;
  --amber: #e4a052;
  --amber-bright: #f2bd7b;
  --ember: #cb6c4c;
  --haze: #b3aec6;
  --line: rgba(244, 239, 229, 0.14);
  --line-strong: rgba(244, 239, 229, 0.24);
  --display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --latin: "Bodoni 72", "Didot", "Bodoni MT", "Bell MT", Georgia, serif;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --frame: min(1320px, calc(100% - 8vw));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: var(--amber);
  color: var(--ink);
}

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

button {
  font: inherit;
}

img,
svg {
  display: block;
  max-width: 100%;
}

h1,
h2,
h3,
p,
dl,
dd,
blockquote,
figure {
  margin: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
}

:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 3000;
  padding: 10px 16px;
  background: var(--paper);
  color: var(--ink);
  font-size: 13px;
  transform: translateY(-160%);
  transition: transform 0.25s ease;
}

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

.page-grain {
  position: fixed;
  inset: 0;
  z-index: 2000;
  pointer-events: none;
  opacity: 0.045;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.75'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
}

.scroll-meter {
  position: fixed;
  inset: 0 0 auto;
  z-index: 2100;
  height: 2px;
  pointer-events: none;
}

.scroll-meter span {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--ember), var(--amber), var(--amber-bright));
  transform: scaleX(0);
  transform-origin: 0 50%;
  will-change: transform;
}

/* Header */

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 22px max(4vw, 28px);
  border-bottom: 1px solid transparent;
  transition: padding 0.45s var(--ease), background 0.45s ease, border-color 0.45s ease;
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg, rgba(12, 13, 19, 0.72), rgba(12, 13, 19, 0));
  pointer-events: none;
  transition: opacity 0.4s ease;
}

.site-header.is-scrolled {
  padding-top: 14px;
  padding-bottom: 14px;
  background: rgba(11, 12, 18, 0.9);
  border-bottom-color: var(--line);
  -webkit-backdrop-filter: blur(18px) saturate(1.2);
  backdrop-filter: blur(18px) saturate(1.2);
}

.site-header.is-scrolled::before {
  opacity: 0;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 12px;
  flex-shrink: 0;
}

.brand-cn {
  font-family: var(--display);
  font-size: 26px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.08em;
}

.brand-en {
  font-family: var(--latin);
  font-size: 8px;
  letter-spacing: 0.26em;
  color: var(--text-dim);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(20px, 2.5vw, 38px);
  margin-left: auto;
}

.site-nav a {
  position: relative;
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  transition: color 0.25s ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -7px;
  left: 0;
  height: 1px;
  background: var(--amber);
  transform: scaleX(0);
  transform-origin: 100% 50%;
  transition: transform 0.35s var(--ease);
}

.site-nav a:hover {
  color: var(--text);
}

.site-nav a:hover::after {
  transform: scaleX(1);
  transform-origin: 0 50%;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  padding: 9px 15px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--text);
  transition: color 0.3s ease, background 0.3s ease, border-color 0.3s ease;
}

.header-cta svg {
  width: 15px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.4;
  transition: transform 0.3s var(--ease);
}

.header-cta:hover {
  border-color: var(--amber);
  background: var(--amber);
  color: var(--ink);
}

.header-cta:hover svg {
  transform: translateX(3px);
}

/* Shared type and layout */

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--sans);
  font-size: 10.5px;
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: 0.16em;
  color: var(--text-dim);
}

.eyebrow-index {
  font-family: var(--latin);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.eyebrow-dark {
  color: var(--ink-text-dim);
}

.eyebrow-dark .eyebrow-index {
  color: #a66625;
}

.eyebrow-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 12px rgba(228, 160, 82, 0.8);
}

.section-frame {
  width: var(--frame);
  margin: 0 auto;
}

.section-light {
  position: relative;
  background-color: var(--paper);
  background-image:
    radial-gradient(circle at 13% 8%, rgba(255, 255, 255, 0.45), transparent 36%),
    radial-gradient(circle at 92% 58%, rgba(178, 143, 92, 0.08), transparent 38%);
  color: var(--ink-text);
}

.section-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--paper-line);
}

.section-label-en {
  font-family: var(--latin);
  font-size: 9px;
  letter-spacing: 0.28em;
  color: #827a6d;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  min-height: 50px;
  padding: 14px 22px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-size: 12.5px;
  font-weight: 400;
  line-height: 1.4;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: transform 0.35s var(--ease), background 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.button svg {
  width: 16px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.5;
  transition: transform 0.35s var(--ease);
}

.button:hover svg {
  transform: translateX(4px);
}

.button-solid {
  background: var(--amber);
  border-color: var(--amber);
  color: #17120b;
}

.button-solid:hover {
  background: var(--amber-bright);
  border-color: var(--amber-bright);
  transform: translateY(-2px);
}

.button-quiet {
  background: transparent;
  border-color: var(--line-strong);
  color: inherit;
}

.section-light .button-quiet {
  border-color: rgba(25, 22, 17, 0.25);
}

.button-quiet:hover {
  border-color: var(--amber);
  color: var(--amber);
  transform: translateY(-2px);
}

/* Hero */

.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 100svh;
  padding: clamp(138px, 17vh, 190px) max(4vw, 24px) 34px;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 77% 31%, rgba(203, 108, 76, 0.14), transparent 34%),
    radial-gradient(ellipse at 22% 76%, rgba(80, 78, 120, 0.1), transparent 38%),
    var(--ink);
}

.hero-atmosphere {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-sun {
  position: absolute;
  top: 8%;
  right: 3vw;
  width: clamp(420px, 57vw, 860px);
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 52%,
      rgba(255, 234, 193, 0.92) 0%,
      rgba(240, 178, 104, 0.58) 13%,
      rgba(214, 124, 80, 0.2) 32%,
      rgba(145, 88, 100, 0.05) 53%,
      transparent 70%);
  filter: blur(18px);
  opacity: 0.9;
  transform: translate3d(0, 0, 0);
  animation: sunBreathe 14s ease-in-out infinite;
}

.hero-halo {
  position: absolute;
  top: 15%;
  right: 10vw;
  width: clamp(300px, 38vw, 590px);
  aspect-ratio: 1;
  border: 1px solid rgba(228, 160, 82, 0.19);
  border-radius: 50%;
  box-shadow:
    inset 0 0 80px rgba(228, 160, 82, 0.04),
    0 0 120px rgba(228, 160, 82, 0.04);
}

.hero-halo::before,
.hero-halo::after {
  content: "";
  position: absolute;
  border-radius: inherit;
  border: 1px solid rgba(244, 239, 229, 0.055);
}

.hero-halo::before {
  inset: -9%;
}

.hero-halo::after {
  inset: 11%;
  border-style: dashed;
  border-color: rgba(244, 239, 229, 0.07);
}

.hero-horizon {
  position: absolute;
  right: 0;
  bottom: 17%;
  left: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 3%, rgba(228, 160, 82, 0.2) 44%, rgba(228, 160, 82, 0.42) 62%, transparent 94%);
}

.ghost-word {
  position: absolute;
  right: -0.08em;
  bottom: 4vh;
  font-family: var(--latin);
  font-size: clamp(140px, 21vw, 330px);
  font-weight: 400;
  line-height: 0.75;
  letter-spacing: -0.045em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(244, 239, 229, 0.055);
  user-select: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(390px, 0.78fr);
  align-items: center;
  gap: clamp(40px, 5vw, 88px);
  width: min(1320px, 100%);
  margin: auto;
}

.hero-copy {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.hero-eyebrow {
  color: #bdb7ab;
}

.hero h1 {
  margin: 26px 0 26px;
  font-family: var(--display);
  font-size: clamp(48px, 5.7vw, 82px);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.045em;
  color: var(--text);
}

.hero h1 .accent {
  position: relative;
  color: var(--amber-bright);
  font-weight: 500;
}

.hero h1 .accent::after {
  content: "";
  position: absolute;
  right: 0.02em;
  bottom: -0.04em;
  left: 0.02em;
  height: 1px;
  background: linear-gradient(90deg, rgba(242, 189, 123, 0.65), rgba(242, 189, 123, 0.05));
}

.nowrap {
  white-space: nowrap;
}

.hero-lede {
  max-width: 600px;
  font-size: clamp(15px, 1.25vw, 17px);
  font-weight: 300;
  line-height: 1.95;
  color: var(--text-dim);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 13px;
  margin-top: 34px;
}

.hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(24px, 3.2vw, 48px);
  margin-top: clamp(40px, 6vh, 64px);
  padding-top: 20px;
  border-top: 1px solid var(--line);
  max-width: 630px;
}

.hero-facts dt {
  margin-bottom: 5px;
  font-size: 9px;
  font-weight: 400;
  letter-spacing: 0.17em;
  color: #767269;
}

.hero-facts dd {
  font-size: 11.5px;
  line-height: 1.6;
  color: #d1cbc0;
}

/* Concept book */

.hero-object {
  position: relative;
  justify-self: center;
  width: min(100%, 470px);
  padding: 20px 0 10px;
  perspective: 1400px;
}

.hero-object::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(120%, 510px);
  aspect-ratio: 1;
  border: 1px solid rgba(244, 239, 229, 0.09);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.hero-object::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(94%, 400px);
  aspect-ratio: 1;
  border: 1px dashed rgba(244, 239, 229, 0.06);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.book-stage {
  position: relative;
  z-index: 2;
  width: clamp(252px, 23vw, 322px);
  margin: 0 auto;
  transform-style: preserve-3d;
  transition: transform 0.45s ease-out;
  will-change: transform;
}

.book-shadow {
  position: absolute;
  right: -4%;
  bottom: -7%;
  left: 8%;
  height: 14%;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.8);
  filter: blur(28px);
  transform: skewX(-8deg);
}

.book {
  position: relative;
  aspect-ratio: 2 / 3;
  transform: rotateY(-11deg) rotateZ(2.4deg);
  transform-style: preserve-3d;
  border-radius: 2px 8px 8px 2px;
  box-shadow:
    -28px 30px 70px rgba(0, 0, 0, 0.52),
    -3px 6px 0 rgba(218, 204, 180, 0.7);
}

.book-face {
  position: relative;
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
  padding: 25px 23px 20px;
  overflow: hidden;
  border-radius: 2px 8px 8px 2px;
  background: #f1e6d2;
  box-shadow: inset 7px 0 12px -8px rgba(50, 37, 22, 0.4);
}

.book-face::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 4;
  background:
    linear-gradient(90deg, rgba(51, 38, 23, 0.16), transparent 7%, transparent 78%, rgba(255, 255, 255, 0.14)),
    linear-gradient(125deg, rgba(255, 255, 255, 0.3), transparent 27%, transparent 70%, rgba(95, 69, 43, 0.08));
  pointer-events: none;
}

.book-face::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 5;
  opacity: 0.4;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.3'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
  pointer-events: none;
}

.book-head {
  position: relative;
  z-index: 3;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--latin);
  font-size: 6.5px;
  letter-spacing: 0.18em;
  color: rgba(24, 20, 14, 0.62);
}

.book-orb {
  position: absolute;
  top: 13%;
  left: 16%;
  width: 80%;
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 30%,
      rgba(255, 237, 199, 0.98) 0%,
      rgba(246, 199, 128, 0.96) 17%,
      rgba(231, 158, 91, 0.94) 43%,
      rgba(202, 101, 70, 0.82) 70%,
      rgba(202, 101, 70, 0.15) 100%);
  mix-blend-mode: multiply;
  opacity: 0.92;
}

.book-orb::after {
  content: "";
  position: absolute;
  inset: 8%;
  border: 1px solid rgba(255, 246, 225, 0.35);
  border-radius: 50%;
}

.book-title {
  position: relative;
  z-index: 3;
  margin-top: auto;
  font-family: var(--display);
  font-size: clamp(76px, 7.9vw, 110px);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: 0.015em;
  color: #17140f;
  transform: translateX(-0.03em);
}

.book-foot {
  position: relative;
  z-index: 3;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  margin-top: 13px;
  padding-top: 9px;
  border-top: 1px solid rgba(23, 20, 15, 0.34);
  font-size: 6.5px;
  line-height: 1.5;
  letter-spacing: 0.08em;
  color: rgba(24, 20, 14, 0.68);
}

.book-foot span:last-child {
  font-family: var(--latin);
  font-size: 8px;
  letter-spacing: 0.05em;
}

.book-spine {
  position: absolute;
  top: 7px;
  right: -11px;
  bottom: 7px;
  width: 11px;
  border-radius: 0 3px 3px 0;
  background:
    linear-gradient(90deg, #cdbfa8 0%, #eadfc9 35%, #d6c8b2 72%, #bcae97 100%);
  box-shadow: 2px 0 6px rgba(0, 0, 0, 0.28);
  transform: rotateY(19deg) translateZ(1px);
  transform-origin: 0 50%;
}

.cover-orbit-note {
  position: absolute;
  bottom: 28px;
  left: -28px;
  display: flex;
  flex-direction: column;
  gap: 1px;
  width: 90px;
  font-family: var(--latin);
  font-size: 7px;
  line-height: 1.6;
  letter-spacing: 0.14em;
  color: rgba(244, 239, 229, 0.45);
}

@media (max-width: 1180px) {
  .cover-orbit-note {
    display: none;
  }
}

.cover-note {
  position: absolute;
  right: 10px;
  bottom: 0;
  font-size: 8px;
  letter-spacing: 0.16em;
  color: rgba(244, 239, 229, 0.3);
}

.hero-bottom {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  width: min(1320px, 100%);
  margin: 30px auto 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.scroll-cue {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  font-size: 10px;
  letter-spacing: 0.14em;
  color: #89857c;
  transition: color 0.3s ease;
}

.scroll-cue:hover {
  color: var(--text);
}

.scroll-cue-line {
  position: relative;
  width: 46px;
  height: 1px;
  overflow: hidden;
  background: rgba(244, 239, 229, 0.18);
}

.scroll-cue-line::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--amber);
  transform: translateX(-100%);
  animation: cueSlide 2.8s ease-in-out infinite;
}

.hero-aside {
  font-family: var(--display);
  font-size: 13px;
  line-height: 1.75;
  letter-spacing: 0.02em;
  text-align: right;
  color: #8f8a80;
}

/* Book introduction */

.book-section {
  padding: clamp(88px, 10vw, 150px) 0 clamp(100px, 12vw, 170px);
}

.book-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  gap: clamp(48px, 8vw, 130px);
  align-items: start;
  margin-top: clamp(52px, 6vw, 82px);
}

.book-intro h2 {
  max-width: 700px;
  font-family: var(--display);
  font-size: clamp(42px, 4.8vw, 68px);
  font-weight: 600;
  line-height: 1.32;
  letter-spacing: -0.045em;
  color: var(--ink-text);
}

.book-intro-copy {
  padding-top: 9px;
}

.book-intro-copy p {
  max-width: 530px;
  margin-bottom: 20px;
  font-size: 14.5px;
  line-height: 1.95;
  color: var(--ink-text-dim);
}

.book-intro-copy p:last-child {
  margin-bottom: 0;
}

.book-intro-copy .intro-lead {
  margin-bottom: 25px;
  font-family: var(--display);
  font-size: clamp(18px, 1.45vw, 21px);
  line-height: 1.85;
  color: #2e2922;
}

.book-factbar {
  display: grid;
  grid-template-columns: 0.7fr 1.35fr 1.55fr 1.1fr;
  margin-top: clamp(60px, 8vw, 104px);
  border-top: 1px solid var(--paper-line);
  border-bottom: 1px solid var(--paper-line);
}

.fact {
  display: flex;
  flex-direction: column;
  gap: 9px;
  padding: 23px 24px;
  border-left: 1px solid var(--paper-line);
}

.fact:first-child {
  border-left: 0;
  padding-left: 0;
}

.fact-key {
  font-size: 9px;
  letter-spacing: 0.17em;
  color: #90887a;
}

.fact-value {
  font-family: var(--display);
  font-size: 14px;
  line-height: 1.65;
  color: #2d2821;
}

.book-notes {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(50px, 9vw, 150px);
  align-items: start;
  margin-top: clamp(74px, 9vw, 120px);
}

.book-quote {
  position: relative;
  padding: 30px 0 0 52px;
  border-left: 1px solid var(--paper-line);
}

.quote-mark {
  position: absolute;
  top: -26px;
  left: 24px;
  font-family: var(--latin);
  font-size: 126px;
  line-height: 1;
  color: rgba(166, 102, 37, 0.2);
  pointer-events: none;
}

.book-quote p {
  position: relative;
  font-family: var(--display);
  font-size: clamp(24px, 2.45vw, 34px);
  font-weight: 500;
  line-height: 1.62;
  letter-spacing: -0.025em;
  color: #211d17;
}

.book-quote cite {
  display: block;
  margin-top: 26px;
  font-family: var(--sans);
  font-size: 10px;
  font-style: normal;
  letter-spacing: 0.18em;
  color: #82796b;
}

.keywords {
  border-top: 1px solid var(--paper-line);
}

.keywords-label {
  padding: 16px 0 14px;
  font-size: 9px;
  letter-spacing: 0.18em;
  color: #8b8274;
}

.keyword {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 18px;
  padding: 23px 0 24px;
  border-top: 1px solid var(--paper-line);
}

.keyword-num {
  padding-top: 4px;
  font-family: var(--latin);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: #a66625;
}

.keyword h3 {
  margin-bottom: 7px;
  font-family: var(--display);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: #27221b;
}

.keyword p {
  max-width: 360px;
  font-size: 13px;
  line-height: 1.85;
  color: #6b6357;
}

/* Seven steps */

.steps-section {
  position: relative;
  padding: clamp(100px, 11vw, 160px) 0 clamp(80px, 8vw, 100px);
  background:
    radial-gradient(ellipse at 13% 47%, rgba(111, 94, 127, 0.12), transparent 33%),
    radial-gradient(ellipse at 86% 18%, rgba(203, 108, 76, 0.08), transparent 27%),
    #0d0e15;
}

.steps-section::before {
  content: "";
  position: absolute;
  top: 0;
  right: 8vw;
  left: 8vw;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(228, 160, 82, 0.36), transparent);
}

.steps-head {
  margin-bottom: clamp(62px, 8vw, 104px);
}

.steps-head .section-label {
  width: 100%;
  margin-bottom: clamp(54px, 6vw, 78px);
  border-top-color: var(--line);
}

.steps-head-copy {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  gap: clamp(40px, 8vw, 130px);
  align-items: end;
}

.steps-head-copy h2 {
  font-family: var(--display);
  font-size: clamp(46px, 5.4vw, 76px);
  font-weight: 600;
  line-height: 1.22;
  letter-spacing: -0.05em;
}

.steps-head-copy p {
  max-width: 470px;
  padding-bottom: 10px;
  font-size: 13.5px;
  line-height: 1.95;
  color: var(--text-dim);
}

.steps-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  gap: clamp(60px, 8vw, 130px);
  align-items: start;
}

.develop-panel {
  position: sticky;
  top: 112px;
}

.develop-card {
  --p: 0.24;
  position: relative;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  border: 1px solid rgba(244, 239, 229, 0.16);
  background: #0a0b10;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.34);
  transition: --p 0.8s var(--ease);
}

.develop-art {
  width: 100%;
  height: 100%;
  filter: brightness(calc(0.55 + var(--p) * 0.45)) saturate(calc(0.6 + var(--p) * 0.45)) contrast(1.02);
  transition: filter 0.8s var(--ease);
}

.dev-glow {
  opacity: calc(0.22 + var(--p) * 0.88);
  transform-box: fill-box;
  transform-origin: center;
  transform: translateY(calc((1 - var(--p)) * 40px)) scale(calc(0.84 + var(--p) * 0.22));
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.dev-sun {
  opacity: calc(0.4 + var(--p) * 0.6);
  transform-box: fill-box;
  transform-origin: center;
  transform: translateY(calc((1 - var(--p)) * 62px));
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.dev-sun-core {
  opacity: calc(0.18 + var(--p) * 0.82);
  transform-box: fill-box;
  transform-origin: center;
  transform: translateY(calc((1 - var(--p)) * 62px));
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.dev-reflection {
  opacity: calc(0.06 + var(--p) * 0.72);
  transition: opacity 0.8s var(--ease);
}

.develop-caption {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  padding: 54px 22px 21px;
  background: linear-gradient(180deg, transparent, rgba(7, 8, 12, 0.88) 64%);
}

.develop-count {
  display: flex;
  align-items: baseline;
  gap: 5px;
  font-family: var(--latin);
  color: var(--text);
}

.develop-count span:first-child {
  font-size: 37px;
  line-height: 0.9;
}

.develop-count span:last-child {
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--text-faint);
}

.develop-caption p {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: #d4cdc0;
}

.develop-progress {
  position: absolute;
  right: 22px;
  bottom: 12px;
  left: 22px;
  height: 1px;
  background: rgba(244, 239, 229, 0.18);
}

.develop-progress span {
  display: block;
  height: 100%;
  background: var(--amber);
  transform: scaleX(calc(0.04 + var(--p) * 0.96));
  transform-origin: 0 50%;
  transition: transform 0.8s var(--ease);
}

.develop-note {
  margin-top: 14px;
  font-size: 9px;
  letter-spacing: 0.14em;
  color: var(--text-faint);
}

.step-list {
  list-style: none;
  border-top: 1px solid var(--line);
}

@media (min-width: 981px) {
  .step-list {
    padding-bottom: 190px;
  }
}

.step {
  position: relative;
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  gap: clamp(18px, 3vw, 38px);
  padding: 40px 0 43px;
  border-bottom: 1px solid var(--line);
  opacity: 0.76;
  transition: opacity 0.55s ease;
}

.step::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--amber);
  transition: width 0.7s var(--ease);
}

.step.is-active {
  opacity: 1;
}

.step.is-active::before {
  width: 72px;
}

.step-number {
  padding-top: 2px;
  font-family: var(--latin);
  font-size: clamp(34px, 3.2vw, 46px);
  font-weight: 400;
  line-height: 0.92;
  letter-spacing: -0.02em;
  color: rgba(244, 239, 229, 0.16);
  transition: color 0.5s ease;
}

.step.is-active .step-number {
  color: var(--amber);
}

.step-kicker {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 11px;
  font-family: var(--latin);
  font-size: 9px;
  letter-spacing: 0.19em;
  color: #8b867c;
  transition: color 0.5s ease;
}

.step-kicker span {
  font-family: var(--sans);
  color: #5c5851;
}

.step.is-active .step-kicker {
  color: var(--amber);
}

.step h3 {
  margin-bottom: 13px;
  font-family: var(--display);
  font-size: clamp(25px, 2.2vw, 31px);
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.025em;
  color: #f0ebe1;
}

.step-text {
  max-width: 640px;
  font-size: 14px;
  line-height: 1.95;
  color: #aaa59a;
}

.step-practice {
  display: grid;
  grid-template-columns: 66px minmax(0, 1fr);
  gap: 16px;
  margin-top: 20px;
  padding: 13px 16px;
  border-left: 1px solid rgba(228, 160, 82, 0.5);
  background: rgba(244, 239, 229, 0.035);
}

.practice-label {
  padding-top: 3px;
  font-size: 9px;
  line-height: 1.6;
  letter-spacing: 0.13em;
  color: var(--amber);
}

.step-practice p {
  font-size: 12.5px;
  line-height: 1.85;
  color: #c8c2b7;
}

.step-note {
  max-width: 640px;
  margin-top: 14px;
  font-size: 11.5px;
  line-height: 1.85;
  color: #918c82;
}

/* Practice card */

.practice-section {
  padding: clamp(90px, 11vw, 154px) 0 clamp(100px, 12vw, 170px);
  background-color: var(--paper-deep);
  background-image:
    radial-gradient(circle at 82% 20%, rgba(255, 251, 242, 0.56), transparent 35%),
    radial-gradient(circle at 6% 82%, rgba(145, 109, 68, 0.1), transparent 38%);
}

.practice-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.96fr) minmax(0, 1.04fr);
  gap: clamp(54px, 8vw, 130px);
  align-items: center;
  margin-top: clamp(52px, 7vw, 88px);
}

.practice-copy h2 {
  max-width: 620px;
  font-family: var(--display);
  font-size: clamp(40px, 4.6vw, 64px);
  font-weight: 600;
  line-height: 1.34;
  letter-spacing: -0.045em;
  color: var(--ink-text);
}

.practice-copy > p {
  max-width: 510px;
  margin-top: 27px;
  font-size: 14px;
  line-height: 1.95;
  color: var(--ink-text-dim);
}

.practice-copy .practice-hint {
  margin-top: 25px;
  padding-top: 18px;
  border-top: 1px solid var(--paper-line);
  font-size: 11.5px;
  color: #6f675b;
}

.practice-deck {
  position: relative;
  width: min(100%, 500px);
  min-height: 470px;
  margin: 0 auto;
  padding: 18px;
}

.deck-layer {
  position: absolute;
  inset: 30px 34px;
  border: 1px solid rgba(25, 22, 17, 0.18);
  background: #d8cbb6;
}

.deck-layer-one {
  transform: rotate(-5deg) translate(-10px, 5px);
  background: #cbbca5;
}

.deck-layer-two {
  transform: rotate(3.5deg) translate(12px, 7px);
  background: #e5d9c5;
}

.practice-card {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  min-height: 434px;
  padding: clamp(26px, 3vw, 38px);
  border: 1px solid rgba(244, 239, 229, 0.18);
  background:
    radial-gradient(circle at 88% 8%, rgba(203, 108, 76, 0.12), transparent 31%),
    #151620;
  color: var(--text);
  box-shadow: 0 28px 60px rgba(47, 35, 21, 0.26);
}

.practice-card::before {
  content: "";
  position: absolute;
  top: 12px;
  right: 12px;
  bottom: 12px;
  left: 12px;
  border: 1px solid rgba(244, 239, 229, 0.07);
  pointer-events: none;
}

.practice-card-top {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  font-family: var(--latin);
  font-size: 8.5px;
  letter-spacing: 0.2em;
  color: #8d887d;
}

.practice-card-body {
  position: relative;
  z-index: 1;
  display: flex;
  flex: 1;
  flex-direction: column;
  justify-content: center;
  padding: 34px 0;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.practice-card.is-swapping .practice-card-body {
  opacity: 0;
  transform: translateY(7px);
}

.practice-card-num {
  margin-bottom: 23px;
  font-family: var(--latin);
  font-size: 74px;
  line-height: 0.75;
  letter-spacing: -0.03em;
  color: var(--amber);
}

.practice-card-text {
  max-width: 100%;
  font-family: var(--display);
  font-size: clamp(19px, 1.75vw, 23px);
  font-weight: 400;
  line-height: 1.72;
  letter-spacing: -0.02em;
  color: #f0ebe0;
}

.draw-button {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  width: 100%;
  padding: 17px 0 0;
  border: 0;
  border-top: 1px solid rgba(244, 239, 229, 0.16);
  background: transparent;
  color: #c8c2b7;
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-align: left;
  cursor: pointer;
  transition: color 0.3s ease;
}

.draw-button svg {
  width: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.4;
  transition: transform 0.35s var(--ease);
}

.draw-button:hover {
  color: var(--amber);
}

.draw-button:hover svg {
  transform: translateX(4px);
}

/* Author */

.author-section {
  padding: clamp(90px, 11vw, 154px) 0 clamp(100px, 12vw, 170px);
  border-top: 1px solid var(--paper-line);
}

.author-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.16fr) minmax(0, 0.86fr);
  gap: clamp(40px, 6vw, 90px);
  align-items: start;
  margin-top: clamp(52px, 7vw, 88px);
}

.author-stamp {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 132px;
  aspect-ratio: 1;
  margin-bottom: 27px;
  border: 1px solid rgba(25, 22, 17, 0.32);
  border-radius: 50%;
  color: #27221b;
}

.author-stamp::before {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px dashed rgba(25, 22, 17, 0.23);
  border-radius: inherit;
}

.author-stamp span {
  font-family: var(--latin);
  font-size: 42px;
  line-height: 1;
  letter-spacing: -0.05em;
}

.author-stamp small {
  margin-top: 6px;
  font-family: var(--latin);
  font-size: 6.5px;
  letter-spacing: 0.24em;
  color: #8a8173;
}

.author-role {
  margin-bottom: 12px;
  font-size: 9.5px;
  letter-spacing: 0.14em;
  color: #81786a;
}

.author-identity h2 {
  font-family: var(--display);
  font-size: clamp(44px, 4.5vw, 62px);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: -0.045em;
  color: var(--ink-text);
}

.author-en {
  margin-top: 15px;
  font-family: var(--latin);
  font-size: 9px;
  letter-spacing: 0.25em;
  color: #8c8375;
}

.author-body {
  padding-top: 8px;
}

.author-body p {
  margin-bottom: 20px;
  font-size: 14px;
  line-height: 1.95;
  color: var(--ink-text-dim);
}

.author-body .author-lead {
  font-family: var(--display);
  font-size: clamp(19px, 1.55vw, 22px);
  line-height: 1.85;
  color: #2d2821;
}

.author-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 29px;
  list-style: none;
}

.author-tags li {
  padding: 7px 11px;
  border: 1px solid rgba(25, 22, 17, 0.2);
  font-size: 10px;
  letter-spacing: 0.03em;
  color: #5e574c;
}

.author-quote {
  padding: 24px 0 0 28px;
  border-top: 1px solid rgba(25, 22, 17, 0.24);
  border-left: 1px solid rgba(25, 22, 17, 0.24);
}

.author-quote p {
  font-family: var(--display);
  font-size: clamp(22px, 2vw, 29px);
  font-weight: 500;
  line-height: 1.66;
  letter-spacing: -0.025em;
  color: #29241d;
}

.author-quote cite {
  display: block;
  margin-top: 20px;
  font-size: 9.5px;
  font-style: normal;
  line-height: 1.7;
  letter-spacing: 0.06em;
  color: #837a6c;
}

/* Closing */

.closing-section {
  position: relative;
  padding: clamp(100px, 12vw, 165px) 0 0;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 76% 8%, rgba(203, 108, 76, 0.16), transparent 33%),
    radial-gradient(ellipse at 20% 58%, rgba(101, 91, 131, 0.1), transparent 37%),
    #0b0c12;
}

.closing-glow {
  position: absolute;
  top: -22vw;
  right: -8vw;
  width: 58vw;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(228, 160, 82, 0.18), transparent 65%);
  filter: blur(30px);
}

.closing-inner {
  position: relative;
  z-index: 2;
  max-width: 820px;
}

.closing-inner h2 {
  margin: 26px 0 25px;
  font-family: var(--display);
  font-size: clamp(44px, 5.5vw, 76px);
  font-weight: 600;
  line-height: 1.28;
  letter-spacing: -0.05em;
}

.closing-copy {
  max-width: 590px;
  font-size: 14.5px;
  line-height: 1.95;
  color: var(--text-dim);
}

.closing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 35px;
}

.closing-meta {
  margin-top: 29px;
  font-size: 9.5px;
  letter-spacing: 0.13em;
  color: #716d65;
}

.closing-word {
  position: relative;
  z-index: 1;
  margin-top: clamp(50px, 7vw, 80px);
  margin-bottom: -0.17em;
  font-family: var(--display);
  font-size: clamp(210px, 37vw, 540px);
  font-weight: 700;
  line-height: 0.78;
  letter-spacing: -0.07em;
  text-align: center;
  color: transparent;
  -webkit-text-stroke: 1px rgba(244, 239, 229, 0.075);
  user-select: none;
}

/* Footer */

.site-footer {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 0.7fr 1.5fr 0.8fr;
  gap: 5vw;
  padding: 38px max(4vw, 24px) 42px;
  border-top: 1px solid var(--line);
  background: #0b0c12;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.footer-brand .brand-cn {
  font-size: 22px;
}

.footer-brand > span:last-child {
  font-family: var(--latin);
  font-size: 7.5px;
  letter-spacing: 0.25em;
  color: #716d64;
}

.footer-notes {
  display: flex;
  flex-direction: column;
  gap: 7px;
  font-size: 10.5px;
  line-height: 1.8;
  color: #8b867d;
}

.footer-end {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  font-size: 10px;
  letter-spacing: 0.05em;
  color: #8b867d;
}

.footer-end a {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  color: #b1aba0;
  transition: color 0.3s ease;
}

.footer-end a:hover {
  color: var(--amber);
}

/* Reveal */

.js .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}

.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* Entrance */

@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(22px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes bookIn {
  from {
    opacity: 0;
    transform: translateY(34px) rotateZ(-2deg) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) rotateZ(0) scale(1);
  }
}

@keyframes sunBreathe {
  0%,
  100% {
    transform: scale(1) translate3d(0, 0, 0);
    opacity: 0.82;
  }
  50% {
    transform: scale(1.035) translate3d(0, -8px, 0);
    opacity: 0.96;
  }
}

@keyframes cueSlide {
  0% {
    transform: translateX(-100%);
  }
  50%,
  100% {
    transform: translateX(100%);
  }
}

.hero-eyebrow {
  animation: riseIn 0.9s var(--ease) 0.1s both;
}

.hero h1 {
  animation: riseIn 1s var(--ease) 0.2s both;
}

.hero-lede {
  animation: riseIn 1s var(--ease) 0.32s both;
}

.hero-actions {
  animation: riseIn 1s var(--ease) 0.42s both;
}

.hero-facts {
  animation: riseIn 1s var(--ease) 0.52s both;
}

.hero-object {
  animation: bookIn 1.3s var(--ease) 0.32s both;
}

.hero-bottom {
  animation: riseIn 1s var(--ease) 0.68s both;
}

/* Responsive */

@media (max-width: 1180px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(350px, 0.72fr);
    gap: 4vw;
  }

  .hero h1 {
    font-size: clamp(46px, 5.4vw, 70px);
  }

  .book-stage {
    width: clamp(238px, 22vw, 288px);
  }

  .book-title {
    font-size: clamp(72px, 7.2vw, 96px);
  }

  .steps-head-copy p {
    max-width: 460px;
  }

  .step {
    grid-template-columns: 62px minmax(0, 1fr);
    gap: 24px;
  }
}

@media (max-width: 980px) {
  :root {
    --frame: min(1320px, calc(100% - 48px));
  }

  .site-nav {
    display: none;
  }

  .header-cta {
    margin-left: auto;
  }

  .hero {
    min-height: auto;
    padding-top: 124px;
    padding-bottom: 28px;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 22px;
  }

  .hero-copy {
    max-width: 690px;
  }

  .hero h1 {
    font-size: clamp(46px, 8vw, 68px);
  }

  .hero-object {
    width: min(100%, 410px);
    margin-top: 22px;
  }

  .hero-bottom {
    margin-top: 48px;
  }

  .hero-aside {
    display: none;
  }

  .book-intro {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .book-intro-copy {
    max-width: 680px;
  }

  .book-factbar {
    grid-template-columns: 1fr 1fr;
  }

  .fact {
    border-bottom: 1px solid var(--paper-line);
  }

  .fact:nth-child(odd) {
    border-left: 0;
    padding-left: 0;
  }

  .fact:nth-child(even) {
    border-left: 1px solid var(--paper-line);
  }

  .fact:nth-last-child(-n + 2) {
    border-bottom: 0;
  }

  .book-notes {
    grid-template-columns: 1fr;
    gap: 58px;
  }

  .book-quote {
    max-width: 640px;
  }

  .steps-head {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .steps-head .section-label {
    max-width: none;
  }

  .steps-head-copy {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .steps-layout {
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .develop-panel {
    position: relative;
    top: auto;
    z-index: 1;
    width: 100%;
  }

  .develop-card {
    aspect-ratio: 16 / 7;
    border-color: rgba(244, 239, 229, 0.22);
    box-shadow: 0 22px 40px rgba(0, 0, 0, 0.38);
  }

  .develop-caption {
    padding: 30px 18px 16px;
  }

  .develop-count span:first-child {
    font-size: 27px;
  }

  .develop-progress {
    right: 18px;
    bottom: 9px;
    left: 18px;
  }

  .develop-note {
    display: none;
  }

  .step {
    opacity: 0.84;
  }

  .step.is-active {
    opacity: 1;
  }

  .practice-layout {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .practice-deck {
    width: min(100%, 560px);
    margin: 0 auto;
  }

  .author-layout {
    grid-template-columns: 0.8fr 1.2fr;
    gap: 44px;
  }

  .author-quote {
    grid-column: 1 / -1;
    max-width: 660px;
    margin-top: 12px;
    padding: 24px 0 0;
    border-left: 0;
  }

  .site-footer {
    grid-template-columns: 1fr 1.6fr;
  }

  .footer-end {
    grid-column: 1 / -1;
    flex-direction: row;
    align-items: center;
    padding-top: 18px;
    border-top: 1px solid var(--line);
  }
}

@media (max-width: 680px) {
  :root {
    --frame: calc(100% - 40px);
  }

  html {
    scroll-padding-top: 80px;
  }

  .site-header {
    gap: 16px;
    padding: 15px 20px;
  }

  .site-header.is-scrolled {
    padding-top: 11px;
    padding-bottom: 11px;
  }

  .brand {
    gap: 9px;
  }

  .brand-cn {
    font-size: 23px;
  }

  .brand-en {
    font-size: 7px;
  }

  .header-cta {
    padding: 8px 11px;
    font-size: 10px;
  }

  .header-cta svg {
    display: none;
  }

  .hero {
    padding-top: 104px;
  }

  .hero h1 {
    margin: 20px 0 21px;
    font-size: clamp(40px, 11.4vw, 55px);
    line-height: 1.18;
    letter-spacing: -0.05em;
  }

  .hero-lede {
    font-size: 14px;
    line-height: 1.9;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    margin-top: 28px;
  }

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

  .hero-facts {
    gap: 18px 26px;
    margin-top: 34px;
  }

  .hero-facts > div {
    min-width: 86px;
  }

  .hero-object {
    width: min(96%, 355px);
    margin-top: 18px;
  }

  .book-stage {
    width: min(74vw, 268px);
  }

  .book-title {
    font-size: clamp(67px, 20vw, 92px);
  }

  .book-face {
    padding: 20px 18px 16px;
  }

  .book-orb {
    top: 15%;
  }

  .cover-orbit-note {
    bottom: 14px;
    left: -4px;
    font-size: 6.5px;
  }

  .cover-note {
    right: 0;
    bottom: -5px;
  }

  .hero-bottom {
    margin-top: 34px;
    padding-top: 16px;
  }

  .section-frame {
    width: var(--frame);
  }

  .book-section,
  .steps-section,
  .practice-section,
  .author-section {
    padding-top: 82px;
    padding-bottom: 92px;
  }

  .section-label {
    padding-top: 13px;
  }

  .section-label-en {
    font-size: 7.5px;
    letter-spacing: 0.2em;
  }

  .book-intro {
    margin-top: 43px;
  }

  .book-intro h2 {
    font-size: clamp(36px, 10.5vw, 47px);
    line-height: 1.38;
  }

  .book-intro-copy .intro-lead {
    font-size: 17px;
  }

  .book-factbar {
    margin-top: 50px;
    grid-template-columns: 1fr;
  }

  .fact,
  .fact:nth-child(even) {
    padding: 17px 0;
    border-left: 0;
    border-bottom: 1px solid var(--paper-line);
  }

  .fact:last-child {
    border-bottom: 0;
  }

  .book-notes {
    margin-top: 57px;
    gap: 48px;
  }

  .book-quote {
    padding: 15px 0 0 22px;
  }

  .quote-mark {
    top: -23px;
    left: 8px;
    font-size: 88px;
  }

  .book-quote p {
    font-size: 22px;
    line-height: 1.65;
  }

  .keyword {
    grid-template-columns: 26px 1fr;
    gap: 12px;
  }

  .steps-head {
    gap: 34px;
    margin-bottom: 50px;
  }

  .steps-head-copy {
    grid-template-columns: 1fr;
    gap: 22px;
  }

  .steps-head-copy h2 {
    font-size: clamp(42px, 12vw, 54px);
  }

  .steps-layout {
    gap: 32px;
  }

  .develop-panel {
    top: auto;
  }

  .develop-card {
    aspect-ratio: 16 / 8;
  }

  .develop-caption {
    padding: 22px 14px 13px;
  }

  .develop-caption p {
    font-size: 10px;
  }

  .develop-count span:first-child {
    font-size: 23px;
  }

  .step {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 13px;
    padding: 31px 0 34px;
  }

  .step-number {
    font-size: 28px;
  }

  .step.is-active::before {
    width: 42px;
  }

  .step h3 {
    font-size: 24px;
  }

  .step-text {
    font-size: 13px;
  }

  .step-practice {
    grid-template-columns: 1fr;
    gap: 4px;
    padding: 12px 13px;
  }

  .step-note {
    font-size: 11px;
  }

  .practice-layout {
    margin-top: 43px;
    gap: 36px;
  }

  .practice-copy h2 {
    font-size: clamp(34px, 10.2vw, 47px);
  }

  .practice-deck {
    min-height: 420px;
    padding: 10px;
  }

  .deck-layer {
    inset: 22px 24px;
  }

  .practice-card {
    min-height: 394px;
    padding: 24px 22px;
  }

  .practice-card-num {
    font-size: 58px;
    margin-bottom: 18px;
  }

  .practice-card-text {
    font-size: 20px;
  }

  .author-layout {
    grid-template-columns: 1fr;
    gap: 34px;
    margin-top: 43px;
  }

  .author-stamp {
    width: 108px;
    margin-bottom: 20px;
  }

  .author-stamp span {
    font-size: 34px;
  }

  .author-identity h2 {
    font-size: clamp(43px, 12vw, 55px);
  }

  .author-body {
    padding-top: 0;
  }

  .author-quote {
    margin-top: 2px;
  }

  .closing-section {
    padding-top: 86px;
  }

  .closing-inner h2 {
    margin: 21px 0 22px;
    font-size: clamp(38px, 10.8vw, 51px);
  }

  .closing-copy {
    font-size: 13.5px;
  }

  .closing-actions {
    flex-direction: column;
    align-items: stretch;
  }

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

  .closing-word {
    margin-top: 54px;
    font-size: clamp(170px, 56vw, 320px);
  }

  .site-footer {
    grid-template-columns: 1fr;
    gap: 22px;
    padding: 30px 20px 32px;
  }

  .footer-end {
    grid-column: auto;
  }

  .footer-notes {
    max-width: 460px;
  }

  .footer-end {
    font-size: 9px;
  }
}

@media (max-width: 390px) {
  .hero h1 {
    font-size: 39px;
  }

  .hero-facts {
    gap: 15px;
  }

  .hero-facts > div {
    min-width: 0;
  }

  .step {
    grid-template-columns: 34px minmax(0, 1fr);
  }

  .step-number {
    font-size: 24px;
  }

  .practice-card {
    min-height: 410px;
  }
}

@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;
    scroll-behavior: auto !important;
  }
}