:root {
  --navy-950: #071c27;
  --navy-900: #0b2533;
  --navy-800: #123849;
  --ivory-50: #fbf8f1;
  --ivory-100: #f4efe6;
  --ivory-200: #e7dfd1;
  --ink: #152a32;
  --muted: #617078;
  --brick: #b94b3f;
  --sage: #5d766f;
  --line: rgba(11, 37, 51, 0.14);
  --page-gutter: clamp(1.25rem, 4vw, 5rem);
  --max-width: 1440px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--navy-950);
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--ivory-50);
  font-family: "Noto Sans CJK SC", "Source Han Sans SC", "Microsoft YaHei",
    "PingFang SC", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  color: var(--navy-900);
  background: var(--ivory-50);
  border-radius: 0.25rem;
  transform: translateY(-180%);
  transition: transform 160ms ease;
}

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

.page-shell {
  min-width: 320px;
  overflow: hidden;
}

.site-header,
.hero,
.about,
.principles,
.privacy-section,
.site-footer {
  width: min(100%, var(--max-width));
  margin-inline: auto;
}

.site-header {
  position: absolute;
  inset: 0 0 auto;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.6rem var(--page-gutter);
  color: var(--ivory-50);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 2.65rem;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid rgba(244, 239, 230, 0.45);
  border-radius: 50%;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 0.84rem;
  letter-spacing: 0.08em;
}

.brand-name {
  font-size: 0.96rem;
  font-weight: 650;
  letter-spacing: 0.08em;
}

.site-nav {
  display: flex;
  gap: clamp(1.25rem, 3vw, 2.75rem);
}

.site-nav a {
  position: relative;
  padding-block: 0.55rem;
  color: rgba(244, 239, 230, 0.72);
  font-size: 0.86rem;
  text-decoration: none;
  transition: color 160ms ease;
}

.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: 0.25rem;
  left: 0;
  height: 1px;
  content: "";
  background: var(--ivory-100);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--ivory-50);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.hero {
  position: relative;
  display: grid;
  min-height: min(900px, 100svh);
  grid-template-columns: minmax(0, 1.05fr) minmax(420px, 0.95fr);
  align-items: center;
  padding: clamp(8.5rem, 14vh, 10rem) var(--page-gutter) clamp(4rem, 8vh, 6rem);
  color: var(--ivory-50);
  background:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    var(--navy-900);
  background-size: 5rem 5rem;
}

.hero::before {
  position: absolute;
  top: 0;
  right: -20%;
  width: 64%;
  height: 100%;
  content: "";
  background: radial-gradient(circle at 30% 40%, rgba(93, 118, 111, 0.22), transparent 65%);
  pointer-events: none;
}

.hero-copy {
  position: relative;
  z-index: 2;
  max-width: 710px;
}

.eyebrow,
.section-index {
  margin: 0 0 1.6rem;
  color: var(--brick);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.18em;
}

.eyebrow {
  display: flex;
  align-items: center;
  color: rgba(244, 239, 230, 0.72);
}

.eyebrow span {
  width: 2.5rem;
  height: 2px;
  margin-right: 0.8rem;
  background: var(--brick);
}

.hero h1 {
  max-width: 9em;
  margin: 0;
  font-family: "Noto Serif CJK SC", "Source Han Serif SC", "Songti SC", SimSun,
    serif;
  font-size: clamp(3.5rem, 7.2vw, 7.6rem);
  font-weight: 600;
  letter-spacing: -0.055em;
  line-height: 1.03;
}

.hero-summary {
  max-width: 32rem;
  margin: 2rem 0 0;
  color: rgba(244, 239, 230, 0.68);
  font-size: clamp(1rem, 1.4vw, 1.16rem);
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2.4rem;
}

.button {
  display: inline-flex;
  min-height: 3.2rem;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border: 1px solid transparent;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 650;
  transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease,
    transform 160ms ease;
}

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

.button-primary {
  color: var(--navy-900);
  background: var(--ivory-100);
}

.button-primary:hover,
.button-primary:focus-visible {
  background: #fffdf8;
}

.button-secondary {
  color: var(--ivory-100);
  border-color: rgba(244, 239, 230, 0.3);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  border-color: rgba(244, 239, 230, 0.7);
  background: rgba(244, 239, 230, 0.06);
}

.portal-note {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin: 2.8rem 0 0;
  color: rgba(244, 239, 230, 0.48);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}

.portal-note span {
  width: 0.42rem;
  height: 0.42rem;
  background: var(--sage);
  border-radius: 50%;
  box-shadow: 0 0 0 0.25rem rgba(93, 118, 111, 0.14);
}

.craft-visual {
  position: relative;
  z-index: 1;
  width: min(100%, 590px);
  aspect-ratio: 0.82;
  justify-self: end;
}

.visual-caption {
  position: absolute;
  top: 1rem;
  right: 0;
  display: flex;
  gap: 1.25rem;
  color: rgba(244, 239, 230, 0.5);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  writing-mode: vertical-rl;
}

.sole-stack {
  position: absolute;
  inset: 7% 7% 11% 3%;
  transform: rotate(-13deg);
}

.sole-layer {
  position: absolute;
  inset: 0;
  border-radius: 50% 42% 46% 52% / 58% 42% 56% 44%;
  clip-path: polygon(19% 1%, 74% 4%, 94% 23%, 98% 58%, 88% 90%, 65% 100%, 45% 89%, 35% 64%, 13% 47%, 0 20%);
}

.sole-layer-back {
  background: var(--brick);
  transform: translate(9%, 9%);
}

.sole-layer-middle {
  background: var(--sage);
  transform: translate(4.5%, 4.5%);
}

.sole-layer-front {
  display: grid;
  overflow: hidden;
  place-items: center;
  color: var(--navy-900);
  background:
    repeating-radial-gradient(ellipse at 65% 70%, transparent 0 17px, rgba(11, 37, 51, 0.09) 18px 19px),
    var(--ivory-100);
  box-shadow: 0 2rem 4rem rgba(0, 0, 0, 0.2);
}

.stitch-line {
  position: absolute;
  inset: 8%;
  border: 2px dashed rgba(185, 75, 63, 0.66);
  border-radius: inherit;
  clip-path: inherit;
}

.layer-index {
  position: absolute;
  bottom: 20%;
  left: 26%;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  transform: rotate(13deg);
}

.visual-stamp {
  position: absolute;
  right: 0;
  bottom: 0;
  display: grid;
  width: 7rem;
  aspect-ratio: 1;
  place-content: center;
  place-items: center;
  border: 1px solid rgba(244, 239, 230, 0.35);
  border-radius: 50%;
  background: rgba(7, 28, 39, 0.38);
  backdrop-filter: blur(8px);
}

.visual-stamp span {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.6rem;
  letter-spacing: 0.08em;
}

.visual-stamp small {
  margin-top: 0.3rem;
  color: rgba(244, 239, 230, 0.58);
  font-size: 0.58rem;
  letter-spacing: 0.18em;
}

.section-light {
  padding-inline: var(--page-gutter);
  background: var(--ivory-50);
}

.about {
  display: grid;
  grid-template-columns: minmax(280px, 0.86fr) minmax(320px, 1.14fr);
  gap: clamp(3rem, 8vw, 8rem);
  padding-top: clamp(5.5rem, 10vw, 9rem);
  padding-bottom: clamp(5.5rem, 9vw, 8rem);
  border-bottom: 1px solid var(--line);
}

.section-heading h2,
.principles-intro h2,
.privacy-copy h2 {
  margin: 0;
  font-family: "Noto Serif CJK SC", "Source Han Serif SC", "Songti SC", SimSun,
    serif;
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 1.22;
}

.section-heading h2 {
  max-width: 8em;
  font-size: clamp(2.2rem, 4.2vw, 4rem);
}

.about-copy {
  align-self: end;
  max-width: 700px;
}

.about-copy p {
  margin: 0;
  color: var(--muted);
  font-size: clamp(0.98rem, 1.2vw, 1.08rem);
  line-height: 2;
}

.about-copy .about-lead {
  margin-bottom: 1.35rem;
  color: var(--ink);
  font-family: "Noto Serif CJK SC", "Source Han Serif SC", "Songti SC", SimSun,
    serif;
  font-size: clamp(1.45rem, 2.5vw, 2.25rem);
  line-height: 1.6;
}

.principles {
  display: grid;
  grid-template-columns: minmax(280px, 0.86fr) minmax(420px, 1.4fr);
  gap: clamp(3rem, 8vw, 8rem);
  padding-top: clamp(5.5rem, 9vw, 8rem);
  padding-bottom: clamp(6rem, 11vw, 10rem);
}

.principles-intro h2 {
  font-size: clamp(2.1rem, 3.8vw, 3.5rem);
}

.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
}

.principle-grid article {
  min-height: 20rem;
  padding: 1.5rem 1.4rem 2rem;
  border-right: 1px solid var(--line);
}

.principle-grid article:first-child {
  border-left: 1px solid var(--line);
}

.principle-number {
  color: var(--brick);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
}

.principle-grid h3 {
  margin: 7rem 0 1rem;
  font-size: 1.2rem;
  font-weight: 700;
}

.principle-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.85;
}

.privacy-section {
  padding: 0 var(--page-gutter) clamp(5rem, 9vw, 8rem);
  background: var(--ivory-50);
}

.privacy-panel {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(3rem, 9vw, 9rem);
  padding: clamp(3rem, 7vw, 6.5rem);
  color: var(--ivory-50);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.03), transparent 50%),
    var(--navy-900);
}

.section-index-inverse {
  color: #d36e62;
}

.privacy-copy h2 {
  font-size: clamp(2.8rem, 5vw, 5rem);
}

.privacy-copy > p:last-child {
  max-width: 30rem;
  margin: 2rem 0 0;
  color: rgba(244, 239, 230, 0.66);
  font-size: 0.96rem;
  line-height: 1.9;
}

.privacy-list {
  align-self: center;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(244, 239, 230, 0.18);
}

.privacy-list li {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: 1rem;
  align-items: center;
  padding: 1.35rem 0;
  border-bottom: 1px solid rgba(244, 239, 230, 0.18);
  color: rgba(244, 239, 230, 0.84);
  font-size: 0.92rem;
}

.privacy-list span {
  color: #d36e62;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 3rem;
  padding: 3rem var(--page-gutter);
  color: rgba(244, 239, 230, 0.66);
  background: var(--navy-950);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand-mark-small {
  width: 2.4rem;
  color: var(--ivory-100);
}

.footer-brand strong {
  color: var(--ivory-100);
  font-size: 0.88rem;
  letter-spacing: 0.06em;
}

.footer-brand p,
.footer-meta p {
  margin: 0.35rem 0 0;
  font-size: 0.72rem;
}

.footer-meta {
  display: grid;
  justify-items: end;
  gap: 0.45rem;
  text-align: right;
}

.footer-meta a {
  color: var(--ivory-100);
  font-size: 0.78rem;
  text-underline-offset: 0.24em;
  text-decoration-color: rgba(244, 239, 230, 0.4);
}

.footer-meta a:hover,
.footer-meta a:focus-visible {
  text-decoration-color: var(--ivory-100);
}

.footer-meta small {
  color: rgba(244, 239, 230, 0.38);
  font-size: 0.65rem;
}

:focus-visible {
  outline: 2px solid #e88b7f;
  outline-offset: 4px;
}

@media (max-width: 1020px) {
  .hero {
    min-height: auto;
    grid-template-columns: minmax(0, 1fr) minmax(320px, 0.78fr);
  }

  .hero h1 {
    font-size: clamp(3.5rem, 8.5vw, 6rem);
  }

  .craft-visual {
    width: 115%;
    margin-right: -22%;
  }

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

@media (max-width: 760px) {
  .site-header {
    padding-top: 1.15rem;
  }

  .brand-name {
    font-size: 0.82rem;
  }

  .site-nav {
    display: none;
  }

  .hero {
    display: block;
    min-height: 100svh;
    padding-top: 8.3rem;
  }

  .hero h1 {
    font-size: clamp(3.25rem, 16vw, 5.4rem);
  }

  .hero-summary {
    max-width: 25rem;
  }

  .craft-visual {
    width: 80%;
    max-width: 360px;
    margin: 2.2rem -10% -1rem auto;
  }

  .visual-stamp {
    width: 5.5rem;
  }

  .about,
  .principles,
  .privacy-panel {
    grid-template-columns: 1fr;
  }

  .about,
  .principles {
    gap: 2.5rem;
  }

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

  .principle-grid article {
    display: grid;
    min-height: auto;
    grid-template-columns: 2.6rem 1fr;
    column-gap: 1rem;
    padding: 1.4rem 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .principle-grid article:first-child {
    border-left: 0;
  }

  .principle-grid h3 {
    margin: 0 0 0.55rem;
  }

  .principle-grid p {
    grid-column: 2;
  }

  .privacy-panel {
    gap: 3rem;
    padding-inline: 1.5rem;
  }

  .site-footer {
    flex-direction: column;
  }

  .footer-meta {
    justify-items: start;
    text-align: left;
  }
}

@media (max-width: 430px) {
  .hero-actions {
    display: grid;
  }

  .button {
    width: 100%;
  }

  .portal-note {
    align-items: flex-start;
    line-height: 1.6;
  }

  .portal-note span {
    flex: 0 0 auto;
    margin-top: 0.35rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

@supports not (backdrop-filter: blur(8px)) {
  .visual-stamp {
    background: rgba(7, 28, 39, 0.88);
  }
}