:root {
  --page-bg: #ffffff;
  --soft-bg: #f7f5f6;
  --text: #171717;
  --muted: #666666;
  --accent: #751d35;
  --accent-deep: #561225;
  --border: #ded9dc;
  --border-dark: #aaa3a7;
  --max-width: 1240px;
  --hero-max-width: 1240px;
  --nav-height: 96px;
  --radius: 10px;
  --section-space-lg: clamp(5.5rem, 7.5vw, 7.5rem);
  --section-space-md: clamp(4.5rem, 6.2vw, 6.25rem);
  --section-space-sm: clamp(3.75rem, 5vw, 5rem);
  --type-hero: clamp(3.6rem, 5.5vw, 6.25rem);
  --type-display: clamp(2.6rem, 4vw, 4.25rem);
  --type-title: clamp(1.8rem, 2.5vw, 2.8rem);
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --transition: 220ms ease;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 1rem);
}

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  background: var(--page-bg);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 17px;
  line-height: 1.72;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.nav-open {
  overflow: hidden;
}

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

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

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

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

button {
  color: inherit;
}

h1,
h2,
h3,
h4,
p,
blockquote,
dl,
dd {
  margin-top: 0;
}

h1,
h2,
h3,
h4 {
  margin-bottom: 0;
  font-weight: 620;
  line-height: 1.18;
  letter-spacing: -0.03em;
}

p {
  color: var(--muted);
}

ul,
ol {
  margin-top: 0;
}

[hidden] {
  display: none !important;
}

section {
  scroll-margin-top: calc(var(--nav-height) + 1rem);
}

main > section {
  --section-index-inset: clamp(0.875rem, 2vw, 1.75rem);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

main > section > .container {
  position: relative;
  z-index: 2;
}

.section-index,
.section-micro,
.contact-watermark {
  position: absolute;
  z-index: 0;
  pointer-events: none;
  user-select: none;
}

.section-index {
  color: rgba(117, 29, 53, 0.038);
  font-family: Arial, Helvetica, sans-serif;
  font-size: clamp(6.5rem, 11vw, 10rem);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: 0.82;
  letter-spacing: -0.075em;
  white-space: nowrap;
}

.section-micro {
  color: rgba(117, 29, 53, 0.075);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.62rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.34em;
  white-space: nowrap;
}

.section-micro-hero {
  bottom: 2rem;
  left: max(1.5rem, calc((100vw - var(--hero-max-width)) / 2));
}

.section-micro-path {
  top: clamp(2.25rem, 4vw, 3.5rem);
  right: max(1.5rem, calc((100vw - var(--max-width)) / 2));
}

.contact-watermark {
  right: auto;
  bottom: 0.12rem;
  left: max(var(--gutter), calc((100vw - var(--max-width)) / 2));
  color: rgba(23, 23, 23, 0.025);
  font-family: Arial, Helvetica, sans-serif;
  font-size: clamp(3.75rem, 7.2vw, 6.5rem);
  font-weight: 700;
  line-height: 0.86;
  letter-spacing: -0.045em;
  white-space: nowrap;
}

main > section::before,
main > section::after {
  position: absolute;
  z-index: 1;
  pointer-events: none;
  user-select: none;
  content: "";
}

.hero > .section-index {
  right: var(--section-index-inset);
  bottom: 2rem;
}

.hero::before {
  bottom: 3.4rem;
  left: max(var(--gutter), calc((100vw - var(--hero-max-width)) / 2));
  width: clamp(5rem, 14vw, 13rem);
  height: 1px;
  background: rgba(117, 29, 53, 0.075);
}

.hero::after {
  top: 20%;
  right: 0;
  width: clamp(5rem, 10vw, 9rem);
  height: clamp(3.5rem, 6vw, 5rem);
  border-top: 1px solid rgba(117, 29, 53, 0.06);
  border-left: 1px solid rgba(117, 29, 53, 0.06);
}

.principles > .section-index {
  top: clamp(2rem, 4vw, 3.5rem);
  right: var(--section-index-inset);
}

.principles::before {
  top: 18%;
  bottom: 14%;
  left: 33.333%;
  width: 33.333%;
  border-right: 1px solid rgba(117, 29, 53, 0.04);
  border-left: 1px solid rgba(117, 29, 53, 0.04);
}

.principles::after {
  top: 2.75rem;
  right: 5%;
  width: 18px;
  height: 18px;
  border-bottom: 1px solid rgba(117, 29, 53, 0.075);
  border-left: 1px solid rgba(117, 29, 53, 0.075);
}

.path-section > .section-index {
  bottom: 1.5rem;
  left: var(--section-index-inset);
}

.path-section::before {
  bottom: 3rem;
  left: 0;
  width: clamp(6rem, 15vw, 14rem);
  height: 1px;
  background: rgba(102, 102, 102, 0.08);
}

.path-section::after {
  bottom: calc(3rem - 3px);
  left: clamp(5.75rem, 14.5vw, 13.5rem);
  width: 7px;
  height: 7px;
  border: 1px solid rgba(117, 29, 53, 0.08);
  border-radius: 50%;
  background: #fff;
}

.products-section > .section-index {
  top: clamp(2.5rem, 5vw, 4rem);
  right: var(--section-index-inset);
}

.products-section::before {
  top: 4rem;
  right: 5%;
  width: clamp(5rem, 13vw, 12rem);
  height: clamp(5rem, 10vw, 9rem);
  border-top: 1px solid rgba(117, 29, 53, 0.045);
  border-left: 1px solid rgba(117, 29, 53, 0.045);
}

.products-section::after {
  top: clamp(8rem, 12vw, 11rem);
  right: 0;
  width: clamp(6rem, 18vw, 17rem);
  height: 1px;
  background: rgba(102, 102, 102, 0.065);
}

.selector-section > .section-index {
  top: clamp(3rem, 6vw, 5rem);
  left: var(--section-index-inset);
}

.selector-section::before {
  top: clamp(7.5rem, 13vw, 11rem);
  left: 0;
  width: clamp(5rem, 16vw, 15rem);
  height: 1px;
  background: rgba(117, 29, 53, 0.07);
}

.selector-section::after {
  top: calc(clamp(7.5rem, 13vw, 11rem) - 3px);
  left: clamp(4.75rem, 15.5vw, 14.5rem);
  width: 7px;
  height: 7px;
  border: 1px solid rgba(117, 29, 53, 0.08);
  border-radius: 50%;
  background: #fff;
}

.cooperation-section > .section-index {
  right: var(--section-index-inset);
  bottom: 1rem;
}

.cooperation-section::before {
  right: 0;
  bottom: 3rem;
  width: clamp(5rem, 14vw, 13rem);
  height: 1px;
  background: rgba(117, 29, 53, 0.07);
}

.cooperation-section::after {
  right: clamp(4.75rem, 13.5vw, 12.5rem);
  bottom: 3rem;
  width: 1px;
  height: 28px;
  background: rgba(117, 29, 53, 0.055);
}

.boundary-section > .section-index {
  top: clamp(2.5rem, 5vw, 4rem);
  right: var(--section-index-inset);
}

.boundary-section::before {
  top: 16%;
  bottom: 12%;
  right: 33.333%;
  width: 33.333%;
  border-right: 1px solid rgba(117, 29, 53, 0.04);
  border-left: 1px solid rgba(117, 29, 53, 0.04);
}

.boundary-section::after {
  top: 3rem;
  left: 5%;
  width: 18px;
  height: 18px;
  border-top: 1px solid rgba(117, 29, 53, 0.07);
  border-right: 1px solid rgba(117, 29, 53, 0.07);
}

.contact-section > .section-index {
  right: var(--section-index-inset);
  bottom: 1rem;
}

.contact-section::before {
  top: 3.5rem;
  right: 0;
  width: clamp(6rem, 22vw, 20rem);
  height: 1px;
  background: rgba(117, 29, 53, 0.07);
}

.contact-section::after {
  top: 3.5rem;
  right: 8%;
  width: 1px;
  height: clamp(2.5rem, 5vw, 4.5rem);
  background: rgba(117, 29, 53, 0.055);
}

.skip-link {
  position: fixed;
  z-index: 999;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.75rem 1rem;
  color: #fff;
  background: var(--accent-deep);
  transform: translateY(-160%);
  transition: transform var(--transition);
}

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

:focus-visible {
  outline: 3px solid rgba(117, 29, 53, 0.34);
  outline-offset: 4px;
}

.container {
  width: min(100% - (var(--gutter) * 2), var(--max-width));
  margin-inline: auto;
}

.section {
  padding-block: var(--section-space-md);
}

.title-line {
  display: block;
}

.title-line-nowrap,
.phrase-nowrap {
  white-space: nowrap;
}

.eyebrow {
  margin-bottom: 1.25rem;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  line-height: 1.3;
  text-transform: uppercase;
}

.section-heading {
  max-width: 820px;
  margin-bottom: clamp(2.5rem, 4.5vw, 4rem);
}

.section-heading h2 {
  margin-bottom: 1.5rem;
  font-size: var(--type-display);
  text-wrap: balance;
}

.section-heading > p:last-child {
  max-width: 650px;
  margin-bottom: 0;
  font-size: 1.08rem;
}

.section-heading-wide {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.62fr);
  align-items: end;
  gap: clamp(2.5rem, 5vw, 4.5rem);
  max-width: none;
}

.section-heading-wide h2 {
  margin-bottom: 0;
}

.section-heading-wide .section-intro {
  margin-bottom: 0;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.4rem;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 650;
  line-height: 1.2;
  transition:
    color var(--transition),
    background-color var(--transition),
    border-color var(--transition),
    transform var(--transition);
}

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

.button-primary {
  color: #fff;
  background: var(--accent);
}

.button-primary:hover {
  background: var(--accent-deep);
}

.button-secondary {
  border-color: var(--border-dark);
  background: #fff;
}

.button-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.site-header {
  position: fixed;
  z-index: 100;
  inset: 0 0 auto;
  height: var(--nav-height);
  border-bottom: 1px solid rgba(222, 217, 220, 0.9);
  background: rgba(255, 255, 255, 0.97);
}

.nav-shell {
  position: relative;
  display: flex;
  width: min(100% - (var(--gutter) * 2), var(--max-width));
  height: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  margin-inline: auto;
}

.brand-link {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
}

.nav-logo {
  width: 76px;
  height: 76px;
  object-fit: contain;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2vw, 1.75rem);
  font-size: 0.95rem;
  font-weight: 580;
}

.primary-nav > a:not(.nav-phone) {
  position: relative;
  padding-block: 0.5rem;
}

.primary-nav > a:not(.nav-phone)::after {
  position: absolute;
  right: 0;
  bottom: 0.2rem;
  left: 0;
  height: 1px;
  background: var(--accent);
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition);
}

.primary-nav > a:not(.nav-phone):hover::after,
.primary-nav > a:not(.nav-phone):focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-phone {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  padding: 0.6rem 1.1rem;
  border-radius: 7px;
  color: #fff;
  background: var(--accent);
}

.nav-phone:hover {
  background: var(--accent-deep);
}

.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  cursor: pointer;
}

.nav-toggle span {
  width: 20px;
  height: 1.5px;
  background: var(--text);
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

.hero {
  display: flex;
  min-height: 720px;
  align-items: center;
  padding-top: calc(var(--nav-height) + clamp(3rem, 5vw, 5rem));
  padding-bottom: clamp(4.5rem, 7vw, 6.5rem);
  background: #fff;
}

.hero-grid {
  display: grid;
  width: min(100% - (var(--gutter) * 2), var(--hero-max-width));
  grid-template-columns: minmax(0, 1.5fr) minmax(360px, 0.82fr);
  align-items: center;
  gap: clamp(3rem, 6vw, 5.5rem);
}

.hero-content {
  align-self: center;
}

.hero-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: clamp(2rem, 3.5vw, 3rem);
}

.hero-brand img {
  width: 88px;
  height: 88px;
  object-fit: contain;
}

.hero-brand div {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.hero-brand span {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.18em;
}

.hero-brand small {
  color: var(--muted);
  font-size: 0.78rem;
}

.hero .eyebrow {
  margin-bottom: 1rem;
}

.hero h1 {
  max-width: 860px;
  margin-bottom: 1.75rem;
  font-size: var(--type-hero);
  font-weight: 660;
  line-height: 1.02;
  letter-spacing: -0.045em;
}

.hero-lead {
  max-width: 680px;
  margin-bottom: 1.75rem;
  font-size: clamp(1.06rem, 1.35vw, 1.2rem);
  line-height: 1.78;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-bottom: 1.65rem;
}

.hero-note {
  margin: 0;
  padding-left: 0.9rem;
  border-left: 1px solid var(--accent);
  color: var(--text);
  font-size: 0.92rem;
}

.hero-visual {
  display: flex;
  min-height: 520px;
  min-width: 0;
  flex-direction: column;
  padding: clamp(1.5rem, 3vw, 2.25rem);
  border: 1px solid var(--border);
  background: #faf9f9;
}

.hero-visual-head,
.hero-visual-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.hero-visual-head {
  padding-bottom: 1.15rem;
  border-bottom: 1px solid var(--border-dark);
}

.hero-visual-head span,
.hero-visual-foot span:first-child {
  color: var(--accent);
}

.hero-visual-head strong {
  font-weight: 650;
}

.hero-visual-copy {
  margin-top: clamp(3.5rem, 7vw, 5.5rem);
  padding-left: 1rem;
  border-left: 2px solid var(--accent);
}

.hero-visual-copy span {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.hero-visual-copy strong {
  display: block;
  font-size: clamp(1.25rem, 2vw, 1.8rem);
  font-weight: 580;
  line-height: 1.35;
  letter-spacing: 0.035em;
}

.hero-mini-path {
  position: relative;
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  margin: auto 0 1.5rem;
  padding: 1.35rem 0 0;
  list-style: none;
}

.hero-mini-path::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 1px;
  background: var(--border-dark);
  content: "";
}

.hero-mini-path li {
  position: relative;
  min-width: 0;
  text-align: center;
}

.hero-mini-path li::before {
  position: absolute;
  top: -1.7rem;
  left: 50%;
  width: 8px;
  height: 8px;
  border: 1px solid var(--border-dark);
  border-radius: 50%;
  background: #faf9f9;
  content: "";
  transform: translateX(-50%);
}

.hero-mini-path li:last-child::before {
  border-color: var(--accent);
  background: var(--accent);
}

.hero-mini-path span,
.hero-mini-path strong {
  display: block;
}

.hero-mini-path span {
  margin-bottom: 0.25rem;
  color: var(--muted);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.hero-mini-path li:last-child span {
  color: var(--accent);
}

.hero-mini-path strong {
  font-size: 0.76rem;
  font-weight: 580;
  letter-spacing: 0.04em;
}

.hero-visual-foot {
  padding-top: 1.1rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.6rem;
}

.principles {
  border-block: 1px solid var(--border);
  background: var(--soft-bg);
}

.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2.5rem;
}

.principle-item {
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-dark);
}

.item-number,
.product-number {
  display: block;
  margin-bottom: 1.2rem;
  color: var(--accent);
  font-size: 1.65rem;
  font-weight: 500;
  letter-spacing: -0.03em;
}

.principle-item h3 {
  margin-bottom: 0.9rem;
  font-size: 1.3rem;
}

.principle-item p {
  margin-bottom: 0;
  font-size: 1rem;
}

.principle-quote {
  max-width: 760px;
  margin: clamp(2.75rem, 5vw, 4.25rem) 0 0;
  padding-left: 1.25rem;
  border-left: 1px solid var(--accent);
  color: var(--text);
  font-size: clamp(1.15rem, 1.7vw, 1.55rem);
  font-weight: 500;
  line-height: 1.65;
}

.path-section {
  background: #fff;
}

.path-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
}

.path-grid::after {
  position: absolute;
  top: -5px;
  right: 0;
  width: 1px;
  height: 11px;
  background: rgba(117, 29, 53, 0.24);
  content: "";
  pointer-events: none;
  user-select: none;
}

.path-grid li {
  position: relative;
  min-height: 180px;
  padding: 1.4rem 1rem 1.25rem 0;
  border-top: 1px solid var(--border-dark);
}

.path-grid li::before {
  position: absolute;
  top: -5px;
  left: 0;
  width: 9px;
  height: 9px;
  border: 2px solid var(--accent);
  border-radius: 50%;
  background: #fff;
  content: "";
}

.path-grid li:not(:last-child)::after {
  position: absolute;
  top: 1.25rem;
  right: 0.8rem;
  color: var(--accent);
  content: "→";
}

.path-grid span {
  display: block;
  margin-bottom: 2.35rem;
  color: var(--accent);
  font-size: 1.6rem;
}

.path-grid h3 {
  margin-bottom: 0.4rem;
  font-size: 1.15rem;
}

.path-grid p {
  margin: 0;
  font-size: 0.92rem;
}

.products-section {
  padding-block: var(--section-space-lg);
  background: var(--soft-bg);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: stretch;
  gap: 1.35rem;
}

.product-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: clamp(1.55rem, 2.5vw, 2.1rem);
  border: 1px solid #d8d2d5;
  border-radius: var(--radius);
  background: #fff;
  transition: border-color var(--transition), transform var(--transition);
}

.product-card:hover {
  border-color: #9e9499;
  transform: translateY(-2px);
}

.product-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.product-card-top p {
  margin: 0;
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-align: right;
}

.product-card h3 {
  min-height: 2.45em;
  margin-bottom: 1.05rem;
  font-size: clamp(1.4rem, 2vw, 1.78rem);
  line-height: 1.22;
  text-wrap: balance;
}

.product-fit {
  min-height: 5.25em;
  margin-bottom: 1.5rem;
  font-size: 0.98rem;
}

.product-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  padding-block: 1.1rem;
  border-block: 1px solid var(--border);
}

.product-meta div {
  min-width: 0;
}

.product-meta span,
.product-core > span,
.result-copy span {
  display: block;
  margin-bottom: 0.3rem;
  color: var(--muted);
  font-size: 0.74rem;
}

.product-meta strong {
  display: block;
  color: var(--text);
  font-size: clamp(1.03rem, 1.45vw, 1.2rem);
  line-height: 1.35;
}

.product-meta div:first-child strong {
  color: var(--accent);
}

.product-core {
  padding-block: 1.2rem;
}

.product-core p {
  margin: 0;
  color: var(--text);
  font-size: 0.96rem;
}

.product-card details {
  margin-top: auto;
  border-top: 1px solid var(--border);
}

.product-card summary {
  position: relative;
  padding: 1.1rem 1.7rem 0.1rem 0;
  color: var(--accent);
  font-size: 0.92rem;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

.product-card summary::-webkit-details-marker {
  display: none;
}

.product-card summary::after {
  position: absolute;
  top: 1.08rem;
  right: 0.15rem;
  content: "+";
  font-size: 1.1rem;
  font-weight: 400;
}

.product-card details[open] summary::after {
  content: "−";
}

.detail-content {
  padding-top: 1rem;
}

.detail-content h4 {
  margin: 1rem 0 0.45rem;
  font-size: 0.88rem;
  letter-spacing: 0;
}

.detail-content p,
.detail-content li {
  color: var(--muted);
  font-size: 0.88rem;
}

.detail-content p {
  margin-bottom: 0;
}

.detail-content ul {
  margin-bottom: 0;
  padding-left: 1.2rem;
}

.tier-list {
  display: grid;
  gap: 0.5rem;
}

.selector-section {
  padding-block: var(--section-space-lg);
  background: #fff;
}

.choice-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.85rem;
}

.choice-card {
  display: flex;
  min-height: 128px;
  min-width: 0;
  flex-direction: column;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.2rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  text-align: left;
  cursor: pointer;
  transition:
    border-color var(--transition),
    background-color var(--transition),
    transform var(--transition);
}

.choice-card:hover {
  border-color: var(--accent);
  background: #fcfbfb;
  transform: translateY(-1px);
}

.choice-card:focus-visible {
  border-color: var(--accent);
  background: #fcfbfb;
}

.choice-card span {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.choice-card strong {
  font-size: 1.02rem;
  line-height: 1.5;
}

.choice-card.is-selected,
.choice-card[aria-pressed="true"] {
  border-color: var(--accent);
  border-left-width: 3px;
  background: #fbf8f9;
}

.selector-result {
  display: grid;
  grid-template-columns: minmax(190px, 0.45fr) minmax(0, 1.55fr);
  gap: clamp(2rem, 5vw, 4rem);
  margin-top: 1rem;
  padding: clamp(1.75rem, 4vw, 3.25rem);
  border: 1px solid var(--border);
  border-top: 2px solid var(--accent);
  border-radius: 4px;
  background: #faf9f9;
  scroll-margin-top: calc(var(--nav-height) + 1rem);
}

.result-label {
  padding-right: 2rem;
  border-right: 1px solid var(--border);
}

.result-label span {
  display: block;
  color: var(--accent);
  font-size: clamp(2.5rem, 5vw, 4.75rem);
  line-height: 1;
}

.result-content h3 {
  margin-bottom: 0.8rem;
  font-size: var(--type-title);
  text-wrap: balance;
}

.result-price {
  margin-bottom: 1.65rem;
  color: var(--accent);
  font-size: 1.3rem;
  font-weight: 700;
}

.result-copy {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  padding-top: 1.35rem;
  border-top: 1px solid var(--border);
}

.result-copy p {
  margin-bottom: 0;
  font-size: 0.98rem;
}

.cooperation-section {
  padding-block: var(--section-space-sm);
  background: #fff;
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
}

.process-grid li {
  position: relative;
  min-height: 122px;
  padding: 1.2rem 1rem 1rem 0;
  border-top: 1px solid var(--border-dark);
}

.process-grid li::before {
  position: absolute;
  top: -4px;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  content: "";
}

.process-grid li:not(:last-child)::after {
  position: absolute;
  top: 1.15rem;
  right: 0.7rem;
  color: var(--accent);
  content: "→";
}

.process-grid span {
  display: block;
  margin-bottom: 1.8rem;
  color: var(--accent);
  font-size: 1.3rem;
}

.process-grid strong {
  font-size: 1rem;
}

.boundary-section {
  background: var(--soft-bg);
}

.boundary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  border-block: 1px solid var(--border-dark);
}

.boundary-grid article {
  min-width: 0;
  padding: clamp(1.75rem, 3vw, 2.5rem);
  border: 0;
  border-right: 1px solid var(--border);
  border-radius: 0;
  background: transparent;
}

.boundary-grid article:last-child {
  border-right: 0;
}

.boundary-grid h3 {
  margin-bottom: 1rem;
  font-size: 1.4rem;
}

.boundary-grid p {
  font-size: 1rem;
}

.boundary-grid p:last-child {
  margin-bottom: 0;
}

.boundary-emphasis {
  border-top: 2px solid var(--accent) !important;
}

.contact-section {
  padding-block: var(--section-space-sm);
  background: #fff;
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(260px, 0.85fr);
  align-items: center;
  gap: clamp(3rem, 7vw, 6rem);
  padding-top: clamp(2.25rem, 4vw, 3.5rem);
  border-top: 1px solid var(--border-dark);
}

.contact-grid h2 {
  max-width: 760px;
  margin-bottom: 1.5rem;
  font-size: var(--type-display);
  text-wrap: balance;
}

.contact-grid p {
  margin-bottom: 0.5rem;
  font-size: 1rem;
}

.contact-grid strong {
  letter-spacing: 0.14em;
}

.contact-action {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.8rem;
}

.contact-action > span {
  color: var(--muted);
  font-size: 0.8rem;
}

.contact-action > a:not(.button) {
  margin-bottom: 1rem;
  color: var(--accent);
  font-size: clamp(1.9rem, 3.5vw, 3.2rem);
  font-weight: 600;
  line-height: 1.1;
  white-space: nowrap;
}

.site-footer {
  padding-block: 2rem;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-inner p {
  margin: 0;
  font-size: 0.76rem;
}

@media (max-width: 1100px) {
  :root {
    --nav-height: 88px;
    --gutter: clamp(1.25rem, 3vw, 2rem);
  }

  .nav-logo {
    width: 68px;
    height: 68px;
  }

  .primary-nav {
    gap: clamp(0.75rem, 1.5vw, 1.1rem);
    font-size: 0.88rem;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(310px, 0.75fr);
    gap: 2.5rem;
  }

  .hero-visual {
    min-height: 460px;
  }

  .path-grid,
  .process-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.2rem;
  }

  .path-grid li,
  .process-grid li {
    min-height: 155px;
  }

  .product-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .product-card h3,
  .product-fit {
    min-height: auto;
  }

  .choice-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .principles::before,
  .principles::after,
  .boundary-section::before,
  .boundary-section::after {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .primary-nav {
    position: absolute;
    top: calc(100% + 0.75rem);
    right: 0;
    left: 0;
    display: flex;
    max-height: calc(100vh - var(--nav-height) - 2rem);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    overflow-y: auto;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    visibility: hidden;
    transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  }

  .primary-nav.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
    visibility: visible;
  }

  .primary-nav > a {
    padding: 0.8rem 0.75rem !important;
  }

  .primary-nav > a:not(.nav-phone)::after {
    display: none;
  }

  .nav-phone {
    justify-content: center;
    margin-top: 0.35rem;
  }

  .hero {
    min-height: auto;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .hero-visual {
    min-height: 390px;
  }

  .section-heading-wide {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .section-heading-wide h2 {
    margin-bottom: 0;
  }

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

  .boundary-grid article,
  .boundary-grid article:last-child {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .boundary-grid article:last-child {
    border-bottom: 0;
  }

  .principle-item {
    padding-bottom: 1rem;
  }
}

@media (max-width: 768px) {
  .hero-brand {
    width: fit-content;
    max-width: 100%;
    justify-content: center;
    align-items: center;
    gap: clamp(0.75rem, 3vw, 1rem);
    margin-inline: auto;
  }

  .hero-brand img {
    flex: 0 0 auto;
    width: clamp(70px, 10vw, 80px);
    height: auto;
  }

  .hero-brand > div {
    min-width: 0;
    align-items: flex-start;
    text-align: left;
  }

  .hero-brand span {
    font-size: clamp(0.7rem, 1.7vw, 0.78rem);
    line-height: 1.35;
    white-space: nowrap;
  }

  .hero-brand small {
    font-size: clamp(0.66rem, 1.55vw, 0.74rem);
    line-height: 1.5;
    white-space: nowrap;
  }

  .path-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
  }

  .path-grid::after {
    display: none;
  }

  .path-grid li {
    min-height: auto;
    padding: 0 0 1.8rem 2rem;
    border-top: 0;
  }

  .path-grid li:last-child {
    padding-bottom: 0;
  }

  .path-grid li::before {
    top: 0.45rem;
    left: 0;
    z-index: 1;
    width: 9px;
    height: 9px;
    border: 0;
    background: var(--accent);
    pointer-events: none;
    user-select: none;
  }

  .path-grid li:not(:last-child)::after {
    top: calc(0.45rem + 9px);
    right: auto;
    bottom: -0.45rem;
    left: 4px;
    width: 1px;
    background: rgba(117, 29, 53, 0.32);
    color: transparent;
    content: "";
    pointer-events: none;
    user-select: none;
  }

  .path-grid span {
    position: static;
    display: block;
    margin: 0 0 0.3rem;
    color: var(--accent);
    font-size: 1.15rem;
    font-weight: 500;
    line-height: 1.2;
  }

  .path-grid h3 {
    margin-bottom: 0.25rem;
    color: var(--text);
    font-size: 1.05rem;
    font-weight: 700;
  }

  .path-grid p {
    color: var(--muted);
    font-size: 0.9rem;
  }

  .process-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .process-grid li {
    min-height: auto;
    padding: 0 0 1.8rem 2rem;
    border-top: 0;
  }

  .process-grid li:last-child {
    padding-bottom: 0;
  }

  .process-grid li::before {
    top: 0.45rem;
    left: 0;
    z-index: 1;
    width: 9px;
    height: 9px;
    background: var(--accent);
    pointer-events: none;
    user-select: none;
  }

  .process-grid li:not(:last-child)::after {
    top: calc(0.45rem + 9px);
    right: auto;
    bottom: -0.45rem;
    left: 4px;
    width: 1px;
    background: rgba(117, 29, 53, 0.32);
    color: transparent;
    content: "";
    pointer-events: none;
    user-select: none;
  }

  .process-grid span {
    position: static;
    display: block;
    margin: 0 0 0.3rem;
    color: var(--accent);
    font-size: 1.15rem;
    font-weight: 500;
    line-height: 1.2;
  }

  .process-grid strong {
    display: block;
    color: var(--text);
    font-size: 1rem;
    font-weight: 700;
  }
}

@media (max-width: 720px) {
  :root {
    --nav-height: 78px;
    --gutter: 1.15rem;
    --section-space-lg: 4.75rem;
    --section-space-md: 4.25rem;
    --section-space-sm: 3.5rem;
    --type-hero: clamp(2.55rem, 10.5vw, 3.35rem);
    --type-display: clamp(2.15rem, 9.5vw, 2.8rem);
    --type-title: clamp(1.65rem, 7vw, 2.2rem);
  }

  main > section::before,
  main > section::after,
  .path-grid::after,
  .section-micro,
  .contact-watermark {
    display: none;
  }

  .section-index {
    color: rgba(117, 29, 53, 0.026);
    font-size: 4.4rem;
  }

  .hero > .section-index,
  .principles > .section-index,
  .path-section > .section-index,
  .products-section > .section-index,
  .selector-section > .section-index,
  .cooperation-section > .section-index,
  .boundary-section > .section-index,
  .contact-section > .section-index {
    top: 1.15rem;
    right: var(--section-index-inset);
    bottom: auto;
    left: auto;
  }

  .hero > .section-index {
    top: calc(var(--nav-height) + 0.8rem);
  }

  .nav-logo {
    width: 60px;
    height: 60px;
  }

  .hero {
    padding-top: calc(var(--nav-height) + 2.75rem);
  }

  .hero-brand {
    margin-bottom: 2rem;
  }

  .hero-visual {
    min-height: 350px;
  }

  .hero-visual-copy {
    margin-top: 3.25rem;
  }

  .product-grid,
  .choice-grid,
  .selector-result,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .choice-card {
    min-height: 105px;
  }

  .result-label {
    padding-right: 0;
    padding-bottom: 1.5rem;
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .result-copy {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    align-items: start;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 430px) {
  body {
    font-size: 16px;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .hero-actions .button,
  .contact-action .button,
  .result-content .button {
    width: 100%;
  }

  .hero-visual {
    min-height: 325px;
    padding: 1.25rem;
  }

  .hero-visual-head {
    font-size: 0.64rem;
  }

  .hero-visual-copy {
    margin-top: 2.75rem;
  }

  .hero-visual-copy strong {
    font-size: 1.2rem;
  }

  .hero-mini-path strong {
    font-size: 0.7rem;
  }

  .hero-visual-foot {
    font-size: 0.52rem;
  }

  .product-card,
  .boundary-grid article,
  .selector-result {
    padding: 1.25rem;
  }

  .product-meta {
    grid-template-columns: 1fr;
  }

  .contact-action > a:not(.button) {
    font-size: 1.75rem;
  }
}

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

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