/* roulang page: index */
/* tokens */
:root {
  --ink: #161616;
  --ink-soft: #2a2a2a;
  --bronze: #3F534C;
  --bronze-deep: #2c3c37;
  --cinnabar: #8A2B27;
  --cinnabar-deep: #6f211e;
  --paper: #F3EEE6;
  --card: #fffbf5;
  --line: #D9D1C7;
  --line-strong: #c4b9ab;
  --dark: #121614;
  --dark-soft: #1a1e1c;
  --gold-line: #b08a4f;
  --muted: #6b655c;
  --white: #fffbf5;
  --shadow: 0 8px 24px rgba(22, 22, 22, .06);
  --radius: 2px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --t: .36s var(--ease);
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 32px;
  --space-xl: 48px;
  --space-2xl: 72px;
  --space-3xl: 112px;
  --fs-body: 16px;
  --fs-h3: 21px;
  --fs-h2: 36px;
  --fs-h1: 64px;
  --fs-small: 13px;
  --container: 1240px;
  --header-top: 40px;
  --header-main: 70px;
  --header-offset: 110px;
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: "Source Han Mono SC", "Sarasa Mono SC", "SFMono-Regular", Consolas, monospace;
}

/* reset */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--sans);
  font-size: var(--fs-body);
  line-height: 1.85;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--bronze); text-decoration: none; transition: color var(--t), border-color var(--t); }
a:hover { color: var(--cinnabar); }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
button { cursor: pointer; border: 0; background: none; }
h1, h2, h3, h4 { font-family: var(--serif); font-weight: 600; letter-spacing: .06em; line-height: 1.28; color: var(--ink); margin: 0 0 .6em; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; }
figure { margin: 0; }
address { font-style: normal; }

/* layout */
.container {
  width: min(100% - 56px, var(--container));
  margin: 0 auto;
}
main { display: block; }
.section {
  padding: var(--space-3xl) 0;
  position: relative;
}
.section--alt { background: #efe8dc; }
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--bronze);
  text-transform: none;
  margin-bottom: 14px;
  font-family: var(--sans);
}
.section-kicker::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--cinnabar);
}
.section-title {
  font-size: var(--fs-h2);
  padding-left: 14px;
  border-left: 2px solid var(--cinnabar);
  margin-bottom: 18px;
}
.section-lead {
  max-width: 760px;
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.9;
  margin-bottom: 40px;
}
.reveal {
  opacity: 0;
  transform: translateY(12px);
  animation: rise .7s var(--ease) forwards;
}
@keyframes rise {
  to { opacity: 1; transform: none; }
}

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  transition: box-shadow var(--t);
}
.site-header.is-scrolled { box-shadow: var(--shadow); }
.header-top {
  height: var(--header-top);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  background: #efe8dc;
  overflow: hidden;
  transition: height .32s var(--ease), opacity .32s var(--ease), padding .32s var(--ease);
}
.site-header.is-scrolled .header-top {
  height: 0;
  opacity: 0;
  border-bottom-width: 0;
  pointer-events: none;
}
.header-top a { color: var(--ink); }
.header-top a:hover { color: var(--cinnabar); }
.header-top-mid { font-weight: 600; letter-spacing: .08em; }
.header-top-right { display: flex; gap: 22px; }
.header-main {
  height: var(--header-main);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  flex-shrink: 0;
}
.logo:hover { color: var(--ink); }
.logo-seal {
  width: 36px;
  height: 36px;
  border: 1px solid var(--cinnabar);
  display: grid;
  place-items: center;
  font-family: var(--serif);
  color: var(--cinnabar);
  font-size: 18px;
  letter-spacing: 0;
}
.logo-text strong {
  display: block;
  font-family: var(--serif);
  font-size: 18px;
  letter-spacing: .16em;
  font-weight: 600;
}
.logo-text span {
  display: block;
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--bronze);
  margin-top: 2px;
}
.nav-desktop {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-desktop a {
  position: relative;
  color: var(--ink);
  font-size: 14px;
  padding: 10px 12px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.nav-desktop a::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 8px;
  height: 1px;
  background: var(--cinnabar);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t);
}
.nav-desktop a:hover::after,
.nav-desktop a.is-active::after { transform: scaleX(1); }
.nav-desktop a:hover { color: var(--ink); }
.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 6px;
}
.menu-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--ink);
  transition: var(--t);
}
.drawer {
  position: fixed;
  inset: 0;
  background: var(--paper);
  z-index: 90;
  display: flex;
  flex-direction: column;
  padding: 28px;
  transform: translateX(100%);
  transition: transform .4s var(--ease);
}
.drawer.is-open { transform: none; }
.drawer-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 40px;
}
.drawer nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.drawer nav a {
  color: var(--ink);
  font-family: var(--serif);
  font-size: 28px;
  letter-spacing: .12em;
  min-height: 52px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--line);
}
.drawer-close {
  width: 44px;
  height: 44px;
  font-size: 28px;
  color: var(--ink);
}

/* hero-carousel */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-offset));
  background: var(--dark);
  overflow: hidden;
}
.hero-slides { position: relative; min-height: inherit; }
.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity .8s var(--ease);
  background-size: cover;
  background-position: center;
}
.hero-slide.is-active {
  opacity: 1;
  pointer-events: auto;
  position: relative;
}
.hero-slide::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(18,22,20,.78) 0%, rgba(18,22,20,.42) 48%, rgba(18,22,20,.18) 100%);
}
.hero-copy {
  position: relative;
  z-index: 2;
  min-height: calc(100vh - var(--header-offset));
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 72px 0 96px;
  max-width: 760px;
  color: var(--white);
}
.hero-index {
  font-family: var(--serif);
  font-size: 14px;
  letter-spacing: .3em;
  color: rgba(243,238,230,.55);
  margin-bottom: 18px;
}
.hero h1, .hero-copy h2 {
  font-size: var(--fs-h1);
  color: var(--white);
  letter-spacing: .08em;
  margin-bottom: 16px;
}
.hero-sub {
  font-size: 18px;
  letter-spacing: .08em;
  color: #d7cfc3;
  margin-bottom: 22px;
  font-family: var(--serif);
}
.hero-desc {
  font-size: 16px;
  line-height: 1.9;
  color: rgba(243,238,230,.88);
  margin-bottom: 32px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-nav {
  position: absolute;
  right: max(28px, calc((100% - var(--container)) / 2));
  top: 50%;
  transform: translateY(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.hero-nav button {
  width: 44px;
  height: 44px;
  border: 1px solid rgba(243,238,230,.35);
  color: var(--white);
  font-size: 18px;
  transition: var(--t);
}
.hero-nav button:hover { background: var(--cinnabar); border-color: var(--cinnabar); }
.hero-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 max(28px, calc((100% - var(--container)) / 2)) 22px;
  color: rgba(243,238,230,.7);
  font-family: var(--serif);
  letter-spacing: .16em;
  font-size: 13px;
}
.hero-bar {
  flex: 1;
  height: 1px;
  background: rgba(243,238,230,.25);
  position: relative;
  overflow: hidden;
}
.hero-bar i {
  display: block;
  height: 100%;
  width: 0;
  background: var(--gold-line);
  animation: none;
}
.hero-slide.is-active ~ .hero-progress .hero-bar i,
.hero.is-playing .hero-bar i {
  animation: loadbar 5.2s linear forwards;
}
@keyframes loadbar {
  from { width: 0; }
  to { width: 100%; }
}

/* sections */
.split {
  display: grid;
  grid-template-columns: 1.16fr .84fr;
  gap: 56px;
  align-items: center;
}
.split--reverse { grid-template-columns: .84fr 1.16fr; }
.split-figure {
  position: relative;
  border: 1px solid var(--line);
  overflow: hidden;
}
.split-figure img { width: 100%; height: 520px; object-fit: cover; }
.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0;
}
.badge {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .04em;
  border: 1px solid var(--line-strong);
  padding: 6px 10px;
  color: var(--bronze);
  background: var(--card);
}
.verify-list {
  list-style: none;
  display: grid;
  gap: 10px;
  margin-top: 18px;
}
.verify-list li {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 12px;
  font-size: 14px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 10px;
}
.verify-list code {
  font-family: var(--mono);
  color: var(--cinnabar);
  font-size: 12px;
}

.matrix {
  display: grid;
  grid-template-columns: .92fr 1.08fr;
  gap: 48px;
  align-items: stretch;
}
.matrix-list { list-style: none; display: grid; gap: 0; }
.matrix-item {
  display: grid;
  grid-template-columns: 52px 1fr auto;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}
.matrix-item:first-child { border-top: 1px solid var(--line); }
.matrix-num {
  font-family: var(--serif);
  font-size: 28px;
  color: var(--bronze);
  letter-spacing: .04em;
  line-height: 1;
}
.matrix-item h3 { font-size: 20px; margin: 0 0 6px; }
.matrix-item p { margin: 0; font-size: 14px; color: var(--muted); line-height: 1.7; }
.matrix-item a {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--cinnabar);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
}
.matrix-visual {
  border: 1px solid var(--line);
  overflow: hidden;
  min-height: 100%;
}
.matrix-visual img { width: 100%; height: 100%; object-fit: cover; min-height: 560px; }

.adv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.adv-card {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 28px 24px 24px;
  min-height: 210px;
  transition: var(--t);
}
.adv-card:hover {
  border-color: var(--bronze);
  transform: translateY(-3px);
}
.adv-card .num {
  font-family: var(--serif);
  font-size: 42px;
  color: var(--bronze);
  letter-spacing: .04em;
  line-height: 1;
  margin-bottom: 18px;
}
.adv-card h3 { font-size: 18px; margin-bottom: 8px; }
.adv-card p { margin: 0; color: var(--muted); font-size: 14px; }

.product-grid {
  display: grid;
  grid-template-columns: 1.2fr .9fr .9fr;
  gap: 18px;
}
.product-card {
  position: relative;
  min-height: 420px;
  overflow: hidden;
  border: 1px solid var(--line);
  display: flex;
  align-items: flex-end;
  color: var(--white);
}
.product-card img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.product-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(18,22,20,.05), rgba(18,22,20,.78));
}
.product-body {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: 24px;
  background: rgba(18,22,20,.55);
  border-top: 1px solid rgba(176,138,79,.4);
}
.product-card:first-child .product-body h3 { font-size: 28px; }
.product-card h3 { font-size: 20px; color: var(--white); margin-bottom: 8px; }
.product-card p { color: #d7cfc3; font-size: 14px; margin-bottom: 14px; }
.product-card:hover { border-color: var(--bronze); transform: translateY(-3px); transition: var(--t); }

/* cards */
.card-line {
  border: 1px solid var(--line);
  background: var(--card);
  transition: var(--t);
}
.card-line:hover {
  border-color: var(--bronze);
  transform: translateY(-3px);
}

/* buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: var(--radius);
  letter-spacing: .12em;
  font-size: 14px;
  transition: var(--t);
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--cinnabar);
  color: var(--white);
}
.btn-primary:hover {
  background: var(--cinnabar-deep);
  color: var(--white);
  transform: translateY(-1px);
}
.btn-ghost {
  border-color: var(--ink);
  color: var(--ink);
  background: transparent;
}
.btn-ghost:hover { background: var(--ink); color: var(--white); }
.btn-light {
  border-color: var(--white);
  color: var(--white);
}
.btn-light:hover { background: var(--white); color: var(--ink); }
.btn:focus-visible,
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--bronze);
  outline-offset: 2px;
}

/* stats */
.stats {
  background: var(--dark);
  color: var(--white);
  padding: 72px 0;
}
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-item { border-left: 1px solid rgba(176,138,79,.35); padding-left: 22px; }
.stat-item strong {
  display: block;
  font-family: var(--serif);
  font-size: 52px;
  letter-spacing: .04em;
  line-height: 1;
  font-weight: 600;
}
.stat-item span {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  color: #c9c2b6;
  letter-spacing: .08em;
}

.process-track {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  position: relative;
}
.process-step {
  padding: 8px 22px 0 0;
  position: relative;
}
.process-step::after {
  content: "";
  position: absolute;
  left: 0;
  right: 18px;
  top: 18px;
  height: 1px;
  background: var(--line-strong);
}
.process-step:last-child::after { display: none; }
.process-index {
  position: relative;
  z-index: 1;
  width: 36px;
  height: 36px;
  background: var(--paper);
  border: 1px solid var(--bronze);
  color: var(--bronze);
  font-family: var(--serif);
  display: grid;
  place-items: center;
  margin-bottom: 18px;
}
.process-step h3 { font-size: 18px; }
.process-step p { font-size: 14px; color: var(--muted); margin: 0; }

/* dark */
.philosophy {
  background: var(--dark);
  color: var(--white);
  padding: 108px 0;
}
.philosophy-grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 64px;
  align-items: center;
}
.philosophy blockquote {
  margin: 0;
  font-family: var(--serif);
  font-size: 34px;
  line-height: 1.55;
  letter-spacing: .08em;
  color: #f3eee6;
}
.gold-line {
  width: 72px;
  height: 1px;
  background: var(--gold-line);
  margin: 28px 0;
}
.case-points { display: grid; gap: 22px; }
.case-points article {
  padding-top: 18px;
  border-top: 1px solid rgba(176,138,79,.35);
}
.case-points h3 { color: var(--white); font-size: 18px; }
.case-points p { color: #c9c2b6; margin: 0; font-size: 14px; }

.cases-wall {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  grid-template-rows: 250px 250px;
  gap: 14px;
}
.case-tile {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  cursor: pointer;
  min-height: 180px;
}
.case-tile:first-child { grid-row: 1 / span 2; }
.case-tile img { width: 100%; height: 100%; object-fit: cover; }
.case-tile figcaption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 18px;
  background: linear-gradient(180deg, transparent, rgba(18,22,20,.82));
  color: var(--white);
}
.case-tile:hover { transform: translateY(-2px); border-color: var(--bronze); transition: var(--t); }
.tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: .14em;
  border: 1px solid rgba(243,238,230,.4);
  padding: 3px 8px;
  margin-bottom: 8px;
}
.case-tile h3 { color: var(--white); font-size: 18px; margin: 0 0 4px; }
.case-tile p { margin: 0; font-size: 13px; color: #d7cfc3; }

.overlay {
  position: fixed;
  inset: 0;
  background: rgba(18,22,20,.72);
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.overlay.is-open { display: flex; }
.overlay-card {
  width: min(680px, 100%);
  background: var(--card);
  border: 1px solid var(--line);
  padding: 32px;
  position: relative;
}
.overlay-card h3 { font-size: 24px; }
.overlay-close {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 44px;
  height: 44px;
  font-size: 24px;
}

.stories-grid {
  display: grid;
  grid-template-columns: 1.3fr .7fr;
  gap: 24px;
}
.story-main {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 40px;
}
.story-main blockquote {
  margin: 0 0 24px;
  font-family: var(--serif);
  font-size: 26px;
  line-height: 1.6;
  letter-spacing: .04em;
}
.story-side { display: grid; gap: 24px; }
.story-side article {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 24px;
}
.story-side p { font-size: 14px; color: var(--ink-soft); }
.by { font-size: 13px; color: var(--bronze); letter-spacing: .08em; }

/* reviews */
.review-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.review-card {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 28px 22px;
  min-height: 260px;
  transition: var(--t);
}
.review-card:hover { border-color: var(--bronze); transform: translateY(-3px); }
.quote-mark {
  width: 28px;
  height: 20px;
  margin-bottom: 16px;
}
.quote-mark i {
  display: block;
  width: 10px;
  height: 10px;
  border-left: 2px solid var(--cinnabar);
  border-top: 2px solid var(--cinnabar);
  transform: rotate(-18deg);
  margin-bottom: 4px;
}
.review-card p { font-size: 14px; min-height: 120px; }
.review-card .by { margin-top: 12px; display: block; }

.scene-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.scene-grid img { width: 100%; height: 420px; object-fit: cover; border: 1px solid var(--line); }
.point-list { list-style: none; display: grid; gap: 14px; }
.point-list li {
  padding-left: 18px;
  border-left: 2px solid var(--bronze);
  font-size: 15px;
}
.apply-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 28px;
}
.apply-cell {
  border: 1px dashed var(--line-strong);
  padding: 16px;
  background: var(--card);
}
.apply-cell h4 { font-size: 16px; margin: 0 0 6px; font-family: var(--serif); }
.apply-cell p { margin: 0; font-size: 13px; color: var(--muted); }

.partner-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.partner-cell {
  min-height: 88px;
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  text-align: center;
  padding: 12px;
  color: var(--muted);
  letter-spacing: .14em;
  font-size: 14px;
  background: var(--card);
  filter: grayscale(1);
}

.news-list { display: grid; gap: 0; }
.news-item {
  display: grid;
  grid-template-columns: 140px 1fr auto;
  gap: 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}
.news-item:first-child { border-top: 1px solid var(--line); }
.news-date { font-family: var(--mono); color: var(--bronze); font-size: 13px; padding-top: 6px; }
.news-item h3 { font-size: 20px; margin: 0 0 8px; }
.news-item p { margin: 0; color: var(--muted); font-size: 14px; }
.news-more {
  margin-top: 24px;
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  letter-spacing: .12em;
  border-bottom: 1px solid var(--cinnabar);
  color: var(--ink);
}

/* faq */
.faq-list { display: grid; gap: 10px; }
.faq-item { border: 1px solid var(--line); background: var(--card); }
.faq-item.is-open { border-left: 2px solid var(--bronze); }
.faq-q {
  width: 100%;
  text-align: left;
  padding: 18px 20px;
  min-height: 56px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  font-size: 16px;
  color: var(--ink);
  font-family: var(--serif);
  letter-spacing: .04em;
}
.faq-icon {
  width: 18px;
  height: 18px;
  position: relative;
  flex-shrink: 0;
}
.faq-icon::before, .faq-icon::after {
  content: "";
  position: absolute;
  background: var(--ink);
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
.faq-icon::before { width: 12px; height: 1px; }
.faq-icon::after { width: 1px; height: 12px; }
.faq-item.is-open .faq-icon::after { display: none; }
.faq-a {
  height: 0;
  overflow: hidden;
  transition: height .36s var(--ease);
}
.faq-a-inner { padding: 0 20px 20px; color: var(--ink-soft); font-size: 15px; }

.guarantee {
  padding: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--card);
}
.guarantee-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.guarantee-item {
  padding: 28px 22px;
  border-right: 1px solid var(--line);
}
.guarantee-item:last-child { border-right: 0; }
.guarantee-item h3 {
  font-size: 16px;
  letter-spacing: .16em;
  margin-bottom: 8px;
}
.guarantee-item p { margin: 0; font-size: 13px; color: var(--muted); }

.contact-grid {
  display: grid;
  grid-template-columns: .86fr 1.14fr;
  gap: 48px;
}
.contact-meta { display: grid; gap: 14px; margin-top: 24px; }
.contact-meta a, .contact-meta p { color: var(--ink); margin: 0; }
.contact-meta span { display: block; color: var(--muted); font-size: 12px; letter-spacing: .14em; margin-bottom: 4px; }

/* forms */
.form-card {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 32px;
}
.form-grid { display: grid; gap: 16px; }
.form-grid label { display: grid; gap: 6px; font-size: 13px; letter-spacing: .08em; color: var(--bronze); }
.form-grid input,
.form-grid select,
.form-grid textarea {
  height: 44px;
  border: 1px solid var(--line-strong);
  background: var(--paper);
  padding: 0 12px;
  color: var(--ink);
  border-radius: var(--radius);
}
.form-grid textarea { height: 110px; padding: 10px 12px; resize: vertical; }
.form-error { color: var(--cinnabar); font-size: 12px; min-height: 16px; }
.form-success {
  display: none;
  border: 1px solid var(--bronze);
  color: var(--bronze);
  padding: 12px;
  font-size: 14px;
  margin-bottom: 12px;
}
.form-success.is-show { display: block; }

/* footer */
.site-footer {
  background: var(--dark);
  color: #c9c2b6;
  padding: 64px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1.2fr .9fr;
  gap: 32px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(217,209,199,.15);
}
.site-footer h3 {
  color: var(--white);
  font-size: 16px;
  letter-spacing: .16em;
  margin-bottom: 16px;
}
.site-footer a { color: #c9c2b6; }
.site-footer a:hover { color: var(--white); }
.footer-brand strong {
  display: block;
  font-family: var(--serif);
  color: var(--white);
  font-size: 22px;
  letter-spacing: .18em;
  margin-bottom: 8px;
}
.footer-nav { display: grid; gap: 8px; }
.footer-copy {
  padding-top: 18px;
  font-size: 12px;
  letter-spacing: .08em;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

/* states */
.btn-primary:active, .btn-ghost:active { transform: translateY(0); }
.is-invalid { border-color: var(--cinnabar) !important; }

/* breakpoints */
@media (max-width: 1440px) {
  :root { --fs-h1: 56px; }
}
@media (max-width: 1024px) {
  :root { --fs-h1: 44px; --fs-h2: 30px; --space-3xl: 88px; }
  .nav-desktop { display: none; }
  .menu-toggle { display: inline-flex; }
  .header-cta { display: none; }
  .split, .split--reverse, .matrix, .philosophy-grid, .stories-grid, .scene-grid, .contact-grid, .footer-grid {
    grid-template-columns: 1fr;
  }
  .product-grid, .adv-grid, .review-grid { grid-template-columns: 1fr 1fr; }
  .stats-row, .process-track, .guarantee-row, .partner-grid { grid-template-columns: 1fr 1fr; }
  .process-step { padding-right: 12px; margin-bottom: 18px; }
  .cases-wall { grid-template-columns: 1fr 1fr; grid-template-rows: 240px 200px 200px; }
  .case-tile:first-child { grid-column: 1 / span 2; grid-row: auto; min-height: 280px; }
  .matrix-visual img, .split-figure img { min-height: 320px; height: 360px; }
  .hero-nav { right: 16px; }
}
@media (max-width: 768px) {
  :root { --fs-h1: 32px; --fs-h2: 26px; --space-3xl: 72px; }
  .container { width: min(100% - 40px, var(--container)); }
  .header-top-right { display: none; }
  .hero { min-height: auto; aspect-ratio: 4 / 5; }
  .hero-copy {
    min-height: auto;
    justify-content: flex-end;
    padding: 40px 0 84px;
    max-width: none;
  }
  .hero-slide::before {
    background: linear-gradient(180deg, rgba(18,22,20,.2) 20%, rgba(243,238,230,.9) 72%);
  }
  .hero h1, .hero-copy h2, .hero-sub { color: var(--ink); }
  .hero-desc { color: var(--ink-soft); }
  .hero-index { color: var(--bronze); }
  .hero-actions .btn-light { border-color: var(--ink); color: var(--ink); }
  .hero-progress { color: var(--muted); }
  .product-grid, .adv-grid, .review-grid, .stats-row, .process-track, .guarantee-row, .partner-grid, .apply-grid {
    grid-template-columns: 1fr;
  }
  .process-track { border-left: 1px solid var(--line); padding-left: 18px; }
  .process-step::after { display: none; }
  .news-item, .matrix-item, .verify-list li { grid-template-columns: 1fr; }
  .cases-wall { grid-template-columns: 1fr; grid-template-rows: none; }
  .case-tile:first-child { grid-column: auto; min-height: 240px; }
  .story-main { padding: 24px; }
  .story-main blockquote { font-size: 20px; }
  .philosophy blockquote { font-size: 24px; }
  .stat-item strong { font-size: 40px; }
  .footer-copy { flex-direction: column; }
  .hero-nav { display: none; }
}
@media (max-width: 520px) {
  :root { --fs-h1: 30px; }
  .logo-text span { max-width: 140px; }
  .product-card { min-height: 340px; }
  .form-card { padding: 20px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}