:root {
  color-scheme: dark;
  --bg: #040a12;
  --bg-deep: #02060b;
  --surface: #081522;
  --surface-soft: rgba(10, 27, 43, 0.78);
  --ink: #f3f7fa;
  --ink-soft: #d2dde5;
  --muted: #8fa1ae;
  --muted-strong: #aab9c4;
  --cyan: #70dfff;
  --cyan-deep: #1d7ea7;
  --blue: #194b92;
  --gold: #d8af68;
  --gold-soft: #efcf94;
  --line: rgba(168, 198, 218, 0.15);
  --line-strong: rgba(112, 223, 255, 0.3);
  --shadow: 0 34px 100px rgba(0, 0, 0, 0.34);
  --page: 1240px;
  --header-height: 78px;
  --radius: 4px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family:
    Inter, "SF Pro Display", "PingFang SC", "Microsoft YaHei", system-ui,
    sans-serif;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

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

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

button {
  font: inherit;
}

img {
  max-width: 100%;
}

::selection {
  background: rgba(112, 223, 255, 0.28);
  color: #fff;
}

.skip-link {
  background: var(--cyan);
  color: var(--bg-deep);
  font-size: 0.88rem;
  font-weight: 800;
  left: 16px;
  padding: 10px 16px;
  position: fixed;
  top: -80px;
  transition: top 160ms ease;
  z-index: 100;
}

.skip-link:focus {
  top: 12px;
}

.page-shell {
  margin: 0 auto;
  max-width: var(--page);
  width: calc(100% - clamp(40px, 9vw, 132px));
}

.site-header {
  align-items: center;
  background: rgba(4, 10, 18, 0.58);
  border-bottom: 1px solid transparent;
  display: grid;
  grid-template-columns: minmax(260px, 1fr) auto minmax(260px, 1fr);
  height: var(--header-height);
  left: 0;
  padding: 0 clamp(20px, 4.5vw, 70px);
  position: fixed;
  right: 0;
  top: 0;
  transition:
    background 220ms ease,
    border-color 220ms ease,
    height 220ms ease;
  z-index: 20;
}

.site-header::before {
  backdrop-filter: blur(18px);
  content: "";
  inset: 0;
  pointer-events: none;
  position: absolute;
  z-index: -1;
}

.site-header.is-scrolled {
  background: rgba(4, 10, 18, 0.92);
  border-color: var(--line);
  height: 70px;
}

.brand {
  align-items: center;
  display: inline-flex;
  gap: 13px;
  justify-self: start;
  min-width: max-content;
}

.brand-mark {
  align-items: center;
  background:
    linear-gradient(145deg, rgba(112, 223, 255, 0.2), transparent 48%),
    #0b1d30;
  border: 1px solid rgba(112, 223, 255, 0.4);
  display: inline-flex;
  height: 42px;
  justify-content: center;
  position: relative;
  width: 42px;
}

.brand-mark::after {
  border-bottom: 1px solid var(--gold);
  border-right: 1px solid var(--gold);
  bottom: 4px;
  content: "";
  height: 7px;
  position: absolute;
  right: 4px;
  width: 7px;
}

.brand-mark span {
  font-family: "Songti SC", SimSun, serif;
  font-size: 0.73rem;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.brand-copy strong {
  font-size: 0.94rem;
  letter-spacing: 0.05em;
}

.brand-copy small {
  color: var(--muted);
  font-size: 0.56rem;
  font-weight: 800;
  letter-spacing: 0.22em;
}

.brand-copy small:empty {
  display: none;
}

.site-nav {
  align-items: center;
  display: flex;
  gap: clamp(22px, 2.7vw, 42px);
  justify-self: center;
}

.site-nav a {
  color: var(--muted-strong);
  font-size: 0.85rem;
  font-weight: 650;
  padding: 28px 0 26px;
  position: relative;
  transition: color 160ms ease;
  white-space: nowrap;
}

.site-nav a::after {
  background: var(--cyan);
  bottom: 20px;
  content: "";
  height: 1px;
  left: 0;
  position: absolute;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
  width: 100%;
}

.site-nav a:hover,
.site-nav a[aria-current="true"] {
  color: var(--ink);
}

.site-nav a:hover::after,
.site-nav a[aria-current="true"]::after {
  transform: scaleX(1);
  transform-origin: left;
}

.header-tools {
  align-items: center;
  display: flex;
  gap: 10px;
  justify-self: end;
}

.language-toggle,
.menu-toggle {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink-soft);
  cursor: pointer;
}

.language-toggle {
  font-size: 0.73rem;
  font-weight: 800;
  height: 40px;
  letter-spacing: 0.08em;
  min-width: 46px;
}

.language-toggle:hover,
.language-toggle:focus-visible,
.menu-toggle:hover,
.menu-toggle:focus-visible {
  border-color: var(--line-strong);
  color: var(--cyan);
}

.header-cta {
  align-items: center;
  background: var(--ink);
  color: var(--bg);
  display: inline-flex;
  font-size: 0.82rem;
  font-weight: 800;
  height: 40px;
  justify-content: center;
  padding: 0 18px;
  transition:
    background 160ms ease,
    color 160ms ease,
    transform 160ms ease;
}

.header-cta:hover {
  background: var(--cyan);
  transform: translateY(-1px);
}

.menu-toggle,
.mobile-navigation {
  display: none;
}

.hero {
  align-items: end;
  display: flex;
  min-height: 860px;
  overflow: hidden;
  padding: calc(var(--header-height) + 104px) 0 56px;
  position: relative;
}

.hero-image,
.hero-shade,
.hero-grid {
  height: 100%;
  inset: 0;
  position: absolute;
  width: 100%;
}

.hero-image {
  object-fit: cover;
  object-position: center;
  transform: scale(1.015);
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(2, 7, 13, 0.98) 0%, rgba(3, 10, 18, 0.87) 37%, rgba(3, 10, 18, 0.24) 72%),
    linear-gradient(0deg, rgba(2, 7, 13, 0.98) 0%, transparent 48%),
    linear-gradient(180deg, rgba(2, 7, 13, 0.52), transparent 24%);
}

.hero-grid {
  background-image:
    linear-gradient(rgba(112, 223, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(112, 223, 255, 0.035) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(90deg, #000, transparent 76%);
}

.hero-inner {
  display: grid;
  gap: 44px;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 0.55fr);
  position: relative;
  z-index: 1;
}

.hero-copy-block {
  max-width: 780px;
}

.eyebrow {
  align-items: center;
  color: var(--cyan);
  display: flex;
  font-size: 0.68rem;
  font-weight: 850;
  gap: 12px;
  letter-spacing: 0.16em;
  margin: 0 0 24px;
  text-transform: uppercase;
}

.eyebrow-index {
  align-items: center;
  border: 1px solid var(--line-strong);
  color: var(--gold-soft);
  display: inline-flex;
  height: 28px;
  justify-content: center;
  letter-spacing: 0.04em;
  min-width: 34px;
  padding: 0 7px;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  font-family: "Songti SC", "STSong", SimSun, serif;
  font-size: clamp(4rem, 8vw, 7.8rem);
  font-weight: 700;
  letter-spacing: -0.075em;
  line-height: 0.98;
  margin-bottom: 26px;
}

html[lang="en"] h1 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(3.45rem, 6.4vw, 6.6rem);
  letter-spacing: -0.055em;
  line-height: 0.96;
  max-width: 900px;
}

.hero-lead {
  color: var(--ink);
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  font-weight: 650;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.hero-description {
  color: var(--muted-strong);
  font-size: 1rem;
  line-height: 1.9;
  margin-bottom: 34px;
  max-width: 650px;
}

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

.button {
  align-items: center;
  display: inline-flex;
  font-size: 0.88rem;
  font-weight: 800;
  gap: 20px;
  justify-content: center;
  min-height: 50px;
  padding: 0 24px;
  transition:
    border-color 180ms ease,
    background 180ms ease,
    color 180ms ease,
    transform 180ms ease;
}

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

.button-primary {
  background: var(--cyan);
  color: #031019;
}

.button-primary:hover {
  background: #a5ebff;
}

.button-secondary {
  border: 1px solid rgba(235, 244, 249, 0.34);
  color: var(--ink);
}

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

.hero-signature {
  align-self: center;
  background:
    linear-gradient(140deg, rgba(112, 223, 255, 0.12), transparent 42%),
    rgba(5, 16, 27, 0.82);
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow);
  justify-self: end;
  margin-top: 60px;
  max-width: 390px;
  padding: 34px;
  position: relative;
}

.hero-signature::before,
.hero-signature::after {
  content: "";
  position: absolute;
}

.hero-signature::before {
  border-left: 1px solid var(--gold);
  border-top: 1px solid var(--gold);
  height: 28px;
  left: -1px;
  top: -1px;
  width: 28px;
}

.hero-signature::after {
  background: var(--gold);
  bottom: -5px;
  height: 9px;
  right: 24px;
  transform: rotate(45deg);
  width: 9px;
}

.signature-label {
  color: var(--gold-soft);
  display: block;
  font-size: 0.63rem;
  font-weight: 850;
  letter-spacing: 0.19em;
  margin-bottom: 24px;
}

.hero-signature strong {
  display: block;
  font-family: "Songti SC", "STSong", SimSun, serif;
  font-size: clamp(1.75rem, 2.4vw, 2.4rem);
  letter-spacing: 0.03em;
  line-height: 1.35;
  margin-bottom: 16px;
}

html[lang="en"] .hero-signature strong {
  font-family: Georgia, "Times New Roman", serif;
  letter-spacing: -0.02em;
}

.hero-signature p {
  color: var(--muted-strong);
  line-height: 1.75;
  margin-bottom: 0;
}

.hero-pillars {
  border-top: 1px solid var(--line);
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 38px;
}

.hero-pillars div {
  align-items: center;
  border-right: 1px solid var(--line);
  display: flex;
  gap: 18px;
  padding: 22px 24px 0 0;
}

.hero-pillars div + div {
  padding-left: 28px;
}

.hero-pillars div:last-child {
  border-right: 0;
}

.hero-pillars span {
  color: var(--gold);
  font-size: 0.65rem;
  font-weight: 850;
  letter-spacing: 0.12em;
}

.hero-pillars p {
  color: var(--ink-soft);
  font-size: 0.86rem;
  font-weight: 650;
  letter-spacing: 0.07em;
  margin-bottom: 0;
}

.section {
  padding: clamp(96px, 11vw, 158px) 0;
}

.section-heading {
  align-items: end;
  display: grid;
  gap: clamp(40px, 9vw, 126px);
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.6fr);
  margin-bottom: clamp(54px, 7vw, 92px);
}

.section-heading h2,
.contact h2 {
  font-family: "Songti SC", "STSong", SimSun, serif;
  font-size: clamp(2.8rem, 5.4vw, 5.2rem);
  font-weight: 700;
  letter-spacing: -0.06em;
  line-height: 1.08;
  margin-bottom: 0;
}

html[lang="en"] .section-heading h2,
html[lang="en"] .contact h2 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.65rem, 4.8vw, 4.8rem);
  letter-spacing: -0.05em;
}

.section-heading > p {
  border-left: 1px solid var(--gold);
  color: var(--muted-strong);
  font-size: 0.98rem;
  line-height: 1.9;
  margin-bottom: 4px;
  padding-left: 24px;
}

.positioning {
  background:
    radial-gradient(circle at 86% 14%, rgba(25, 75, 146, 0.25), transparent 31%),
    var(--bg);
}

.positioning-statement {
  border-bottom: 1px solid var(--line);
  border-top: 1px solid var(--line);
  margin-bottom: 52px;
  padding: clamp(34px, 5vw, 62px) 0;
}

.positioning-statement p {
  color: var(--ink-soft);
  font-family: "Songti SC", "STSong", SimSun, serif;
  font-size: clamp(1.75rem, 3.25vw, 3.2rem);
  letter-spacing: -0.025em;
  line-height: 1.48;
  margin-bottom: 0;
  max-width: 1020px;
}

html[lang="en"] .positioning-statement p {
  font-family: Georgia, "Times New Roman", serif;
}

.capability-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.capability-card {
  background: linear-gradient(145deg, rgba(11, 27, 43, 0.9), rgba(6, 16, 27, 0.76));
  border: 1px solid var(--line);
  min-height: 330px;
  overflow: hidden;
  padding: clamp(26px, 3vw, 38px);
  position: relative;
  transition:
    border-color 220ms ease,
    transform 220ms ease;
}

.capability-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-6px);
}

.capability-card::after {
  background: radial-gradient(circle, rgba(112, 223, 255, 0.17), transparent 66%);
  content: "";
  height: 230px;
  position: absolute;
  right: -95px;
  top: -100px;
  width: 230px;
}

.card-number {
  color: var(--gold);
  font-size: 0.69rem;
  font-weight: 850;
  letter-spacing: 0.12em;
}

.capability-icon {
  align-items: center;
  border: 1px solid var(--line-strong);
  display: flex;
  height: 62px;
  justify-content: center;
  margin: 56px 0 38px;
  position: relative;
  width: 62px;
}

.capability-icon span {
  border: 1px solid var(--cyan);
  height: 24px;
  transform: rotate(45deg);
  width: 24px;
}

.capability-icon-diamond {
  border-radius: 50%;
}

.capability-icon-diamond span {
  border-radius: 50%;
  transform: none;
}

.capability-icon-lines span {
  border: 0;
  border-bottom: 1px solid var(--cyan);
  border-top: 1px solid var(--cyan);
  height: 16px;
  position: relative;
  transform: none;
  width: 28px;
}

.capability-icon-lines span::after {
  background: var(--cyan);
  content: "";
  height: 1px;
  left: 0;
  position: absolute;
  top: 7px;
  width: 28px;
}

.capability-card h3,
.service-card h3 {
  font-family: "Songti SC", "STSong", SimSun, serif;
  font-size: 1.55rem;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

html[lang="en"] .capability-card h3,
html[lang="en"] .service-card h3 {
  font-family: Georgia, "Times New Roman", serif;
}

.capability-card p {
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.82;
  margin-bottom: 0;
}

.focus-band {
  align-items: start;
  border-bottom: 1px solid var(--line);
  border-top: 1px solid var(--line);
  display: grid;
  gap: 30px;
  grid-template-columns: 160px 1fr;
  margin-top: 74px;
  padding: 28px 0;
}

.focus-band > p {
  color: var(--gold-soft);
  font-size: 0.7rem;
  font-weight: 850;
  letter-spacing: 0.12em;
  margin-bottom: 0;
  text-transform: uppercase;
}

.focus-band ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 0;
  list-style: none;
  margin: 0;
  padding: 0;
}

.focus-band li {
  color: var(--ink-soft);
  font-size: 0.88rem;
  padding: 0 22px;
  position: relative;
}

.focus-band li:first-child {
  padding-left: 0;
}

.focus-band li + li::before {
  background: rgba(216, 175, 104, 0.6);
  content: "";
  height: 3px;
  left: 0;
  position: absolute;
  top: 0.58em;
  transform: rotate(45deg);
  width: 3px;
}

.founder {
  background:
    linear-gradient(135deg, rgba(25, 75, 146, 0.2), transparent 30%),
    #06111f;
  border-bottom: 1px solid var(--line);
  border-top: 1px solid var(--line);
}

.founder-layout {
  align-items: start;
  display: grid;
  gap: clamp(42px, 8vw, 104px);
  grid-template-columns: minmax(280px, 0.78fr) minmax(0, 1.35fr);
}

.founder-profile {
  position: sticky;
  top: 110px;
}

.founder-portrait {
  background: #0b1928;
  border: 1px solid var(--line-strong);
  margin: 0;
  overflow: hidden;
  padding: 9px;
  position: relative;
}

.founder-portrait::after {
  background: linear-gradient(0deg, rgba(2, 7, 13, 0.58), transparent 28%);
  content: "";
  inset: 9px;
  pointer-events: none;
  position: absolute;
}

.founder-portrait img {
  aspect-ratio: 4 / 5.15;
  display: block;
  object-fit: cover;
  object-position: center top;
  width: 100%;
}

.founder-nameplate {
  border-bottom: 1px solid var(--line);
  padding: 28px 4px 24px;
}

.founder-nameplate p {
  color: var(--gold);
  font-size: 0.63rem;
  font-weight: 850;
  letter-spacing: 0.18em;
  margin-bottom: 10px;
}

.founder-nameplate h3 {
  font-family: "Songti SC", "STSong", SimSun, serif;
  font-size: 2.5rem;
  letter-spacing: 0.04em;
  margin-bottom: 7px;
}

html[lang="en"] .founder-nameplate h3 {
  font-family: Georgia, "Times New Roman", serif;
}

.founder-nameplate span {
  color: var(--muted);
  font-size: 0.88rem;
}

.founder-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 20px;
}

.founder-tags span {
  border: 1px solid var(--line);
  color: var(--muted-strong);
  font-size: 0.72rem;
  padding: 7px 11px;
}

.founder-summary {
  border-bottom: 1px solid var(--line);
  padding-bottom: 54px;
}

.founder-summary > p {
  color: var(--ink-soft);
  font-family: "Songti SC", "STSong", SimSun, serif;
  font-size: clamp(1.35rem, 2.4vw, 2rem);
  line-height: 1.68;
  margin-bottom: 40px;
}

html[lang="en"] .founder-summary > p {
  font-family: Georgia, "Times New Roman", serif;
}

.founder-evidence {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.founder-evidence article {
  background: rgba(4, 12, 21, 0.52);
  border-left: 2px solid var(--gold);
  padding: 22px 24px;
}

.founder-evidence strong {
  color: var(--ink);
  display: block;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.45rem, 2.5vw, 2.2rem);
  font-weight: 500;
  margin-bottom: 8px;
}

.founder-evidence span {
  color: var(--muted);
  font-size: 0.78rem;
}

.timeline {
  padding-top: 24px;
}

.timeline-item {
  display: grid;
  gap: 24px;
  grid-template-columns: 12px 1fr;
  padding: 34px 0;
  position: relative;
}

.timeline-item:not(:last-child) {
  border-bottom: 1px solid var(--line);
}

.timeline-dot {
  background: var(--cyan);
  height: 7px;
  margin-top: 8px;
  transform: rotate(45deg);
  width: 7px;
}

.timeline-label {
  color: var(--gold);
  font-size: 0.65rem;
  font-weight: 850;
  letter-spacing: 0.14em;
  margin-bottom: 12px;
  text-transform: uppercase;
}

.timeline h3 {
  font-size: 1.18rem;
  margin-bottom: 12px;
}

.timeline-item div > p:last-child {
  color: var(--muted);
  line-height: 1.85;
  margin-bottom: 0;
}

.business {
  background:
    radial-gradient(circle at 10% 8%, rgba(25, 75, 146, 0.18), transparent 26%),
    var(--bg);
}

.service-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.service-card {
  background:
    linear-gradient(140deg, rgba(112, 223, 255, 0.055), transparent 38%),
    var(--surface-soft);
  border: 1px solid var(--line);
  min-height: 440px;
  padding: clamp(28px, 4vw, 50px);
  position: relative;
  transition:
    background 220ms ease,
    border-color 220ms ease,
    transform 220ms ease;
}

.service-card:hover {
  background:
    linear-gradient(140deg, rgba(112, 223, 255, 0.11), transparent 44%),
    rgba(10, 27, 43, 0.92);
  border-color: var(--line-strong);
  transform: translateY(-5px);
}

.service-topline {
  align-items: center;
  display: flex;
  justify-content: space-between;
  margin-bottom: 72px;
}

.service-number {
  color: var(--gold);
  font-size: 0.7rem;
  font-weight: 850;
  letter-spacing: 0.14em;
}

.service-arrow {
  align-items: center;
  border: 1px solid var(--line);
  color: var(--muted);
  display: inline-flex;
  height: 38px;
  justify-content: center;
  transition:
    border-color 180ms ease,
    color 180ms ease,
    transform 180ms ease;
  width: 38px;
}

.service-card:hover .service-arrow {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: rotate(45deg);
}

.service-card h3 {
  font-size: clamp(1.7rem, 2.6vw, 2.35rem);
  margin-bottom: 18px;
}

.service-card > p {
  color: var(--muted-strong);
  line-height: 1.9;
  margin-bottom: 34px;
  max-width: 520px;
}

.service-card ul {
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 12px 0;
  list-style: none;
  margin: 0;
  padding: 22px 0 0;
}

.service-card li {
  color: var(--muted);
  font-size: 0.76rem;
  padding: 0 18px;
  position: relative;
}

.service-card li:first-child {
  padding-left: 0;
}

.service-card li + li::before {
  background: var(--gold);
  content: "";
  height: 3px;
  left: 0;
  position: absolute;
  top: 0.48em;
  transform: rotate(45deg);
  width: 3px;
}

.contact {
  background:
    linear-gradient(90deg, rgba(3, 9, 16, 0.97), rgba(4, 15, 26, 0.86)),
    url("assets/rythan-ip-hero.png") center 72% / cover;
  border-top: 1px solid var(--line);
  padding: clamp(100px, 12vw, 170px) 0;
  position: relative;
}

.contact::after {
  border: 1px solid rgba(112, 223, 255, 0.08);
  content: "";
  inset: 28px;
  pointer-events: none;
  position: absolute;
}

.contact-inner {
  align-items: start;
  display: grid;
  gap: clamp(48px, 9vw, 130px);
  grid-template-columns: minmax(0, 1.1fr) minmax(360px, 0.72fr);
  position: relative;
  z-index: 1;
}

.contact-heading h2 {
  max-width: 760px;
}

.contact-panel {
  background: rgba(4, 13, 23, 0.82);
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow);
  padding: clamp(28px, 4vw, 48px);
}

.contact-panel > p {
  color: var(--muted-strong);
  line-height: 1.9;
  margin-bottom: 34px;
}

.contact-email,
.contact-website {
  align-items: center;
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 8px 16px;
  grid-template-columns: 1fr auto;
  padding: 24px 0;
}

.contact-email {
  border-top: 1px solid var(--line);
}

.contact-email > span:first-child,
.contact-website > span:first-child,
.contact-address > span {
  color: var(--gold);
  font-size: 0.65rem;
  font-weight: 850;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.contact-email strong,
.contact-website strong {
  font-size: clamp(1rem, 1.7vw, 1.28rem);
  grid-column: 1;
  word-break: break-word;
}

.contact-email-arrow {
  color: var(--cyan);
  font-size: 1.2rem;
  grid-column: 2;
  grid-row: 1 / span 2;
  transition: transform 180ms ease;
}

.contact-email:hover .contact-email-arrow,
.contact-website:hover .contact-email-arrow {
  transform: translate(3px, -3px);
}

.contact-address {
  padding-top: 26px;
}

.contact-address p {
  color: var(--ink-soft);
  line-height: 1.7;
  margin: 10px 0 0;
}

.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--line);
  color: var(--muted);
  padding: 36px 0;
}

.footer-inner {
  align-items: end;
  display: flex;
  justify-content: space-between;
}

.footer-inner strong {
  color: var(--ink-soft);
  display: block;
  font-size: 0.85rem;
  margin-bottom: 9px;
}

.footer-inner p {
  font-size: 0.7rem;
  margin-bottom: 0;
}

.footer-links {
  align-items: center;
  display: flex;
  font-size: 0.7rem;
  gap: 24px;
}

.footer-links a {
  transition: color 160ms ease;
}

.footer-links a:hover {
  color: var(--cyan);
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 700ms cubic-bezier(0.22, 1, 0.36, 1),
    transform 700ms cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.capability-card:nth-child(2),
.service-card:nth-child(2) {
  transition-delay: 70ms;
}

.capability-card:nth-child(3),
.service-card:nth-child(3) {
  transition-delay: 140ms;
}

.service-card:nth-child(4) {
  transition-delay: 210ms;
}

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

@media (max-width: 1060px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .site-nav {
    display: none;
  }

  .menu-toggle {
    align-items: center;
    display: inline-flex;
    flex-direction: column;
    gap: 6px;
    height: 40px;
    justify-content: center;
    width: 42px;
  }

  .menu-toggle span {
    background: currentColor;
    height: 1px;
    transition:
      transform 180ms ease,
      width 180ms ease;
    width: 18px;
  }

  .menu-toggle[aria-expanded="true"] span:first-child {
    transform: translateY(3.5px) rotate(45deg);
  }

  .menu-toggle[aria-expanded="true"] span:last-child {
    transform: translateY(-3.5px) rotate(-45deg);
  }

  .mobile-navigation {
    background: rgba(4, 10, 18, 0.98);
    border-bottom: 1px solid var(--line);
    display: grid;
    gap: 0;
    left: 0;
    opacity: 0;
    padding: 22px clamp(20px, 5vw, 70px) 34px;
    pointer-events: none;
    position: absolute;
    right: 0;
    top: 100%;
    transform: translateY(-10px);
    transition:
      opacity 180ms ease,
      transform 180ms ease;
    visibility: hidden;
  }

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

  .mobile-navigation a {
    border-bottom: 1px solid var(--line);
    color: var(--ink-soft);
    font-size: 1rem;
    padding: 17px 0;
  }

  .hero {
    min-height: 820px;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(270px, 0.65fr);
  }

  .section-heading,
  .contact-inner {
    gap: 48px;
    grid-template-columns: 1fr;
  }

  .section-heading > p {
    max-width: 660px;
  }

  .contact-panel {
    max-width: 660px;
  }
}

@media (max-width: 780px) {
  :root {
    --header-height: 68px;
  }

  .page-shell {
    width: calc(100% - 36px);
  }

  .site-header {
    padding: 0 18px;
  }

  .site-header.is-scrolled {
    height: 64px;
  }

  .brand-mark {
    height: 38px;
    width: 38px;
  }

  .brand-copy strong {
    font-size: 0.83rem;
  }

  .brand-copy small {
    font-size: 0.5rem;
  }

  .header-cta {
    display: none;
  }

  .hero {
    align-items: end;
    min-height: 800px;
    padding: 132px 0 40px;
  }

  .hero-image {
    object-position: 58% center;
  }

  .hero-shade {
    background:
      linear-gradient(90deg, rgba(2, 7, 13, 0.97), rgba(3, 10, 18, 0.66) 72%, rgba(3, 10, 18, 0.3)),
      linear-gradient(0deg, rgba(2, 7, 13, 0.98), rgba(2, 7, 13, 0.25) 64%);
  }

  .hero-inner {
    gap: 26px;
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: clamp(3.35rem, 16vw, 5.5rem);
  }

  html[lang="en"] h1 {
    font-size: clamp(3rem, 12.5vw, 4.6rem);
  }

  .hero-lead {
    font-size: 1.08rem;
    letter-spacing: 0.03em;
  }

  .hero-description {
    font-size: 0.93rem;
    line-height: 1.8;
  }

  .hero-signature {
    display: none;
  }

  .hero-pillars {
    margin-top: 28px;
  }

  .hero-pillars div {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    padding: 17px 10px 0 0;
  }

  .hero-pillars div + div {
    padding-left: 14px;
  }

  .hero-pillars p {
    font-size: 0.73rem;
    letter-spacing: 0;
    line-height: 1.45;
  }

  .section {
    padding: 92px 0;
  }

  .section-heading {
    gap: 28px;
    margin-bottom: 50px;
  }

  .section-heading h2,
  .contact h2 {
    font-size: clamp(2.35rem, 11vw, 3.7rem);
  }

  html[lang="en"] .section-heading h2,
  html[lang="en"] .contact h2 {
    font-size: clamp(2.25rem, 10vw, 3.5rem);
  }

  .section-heading > p {
    font-size: 0.92rem;
    padding-left: 18px;
  }

  .positioning-statement {
    margin-bottom: 34px;
    padding: 30px 0;
  }

  .positioning-statement p {
    font-size: 1.55rem;
  }

  .capability-grid,
  .service-grid {
    grid-template-columns: 1fr;
  }

  .capability-card {
    min-height: 290px;
  }

  .capability-icon {
    margin: 42px 0 30px;
  }

  .focus-band {
    grid-template-columns: 1fr;
    margin-top: 50px;
  }

  .focus-band li {
    padding: 0 15px;
  }

  .founder-layout {
    gap: 50px;
    grid-template-columns: 1fr;
  }

  .founder-profile {
    display: grid;
    gap: 0 22px;
    grid-template-columns: minmax(120px, 0.48fr) minmax(0, 1fr);
    position: static;
  }

  .founder-portrait {
    grid-row: 1 / span 2;
  }

  .founder-nameplate {
    align-self: end;
  }

  .founder-tags {
    align-self: start;
  }

  .founder-summary {
    padding-bottom: 38px;
  }

  .founder-summary > p {
    font-size: 1.25rem;
    margin-bottom: 30px;
  }

  .founder-evidence {
    grid-template-columns: 1fr;
  }

  .service-card {
    min-height: 0;
  }

  .service-topline {
    margin-bottom: 48px;
  }

  .contact {
    padding: 92px 0;
  }

  .contact::after {
    inset: 14px;
  }

  .contact-inner {
    gap: 40px;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 28px;
  }
}

@media (max-width: 520px) {
  .brand-copy {
    display: none;
  }

  .hero {
    min-height: 760px;
  }

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

  .button {
    justify-content: space-between;
    width: 100%;
  }

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

  .hero-pillars div,
  .hero-pillars div + div {
    align-items: center;
    border-bottom: 1px solid var(--line);
    border-right: 0;
    flex-direction: row;
    padding: 13px 0;
  }

  .hero-pillars div:last-child {
    border-bottom: 0;
  }

  .founder-profile {
    display: block;
  }

  .founder-portrait {
    max-width: 270px;
  }

  .founder-tags {
    padding-bottom: 4px;
  }

  .service-card {
    padding: 28px 24px;
  }

  .service-card ul {
    align-items: flex-start;
    flex-direction: column;
  }

  .service-card li,
  .service-card li:first-child {
    padding-left: 12px;
  }

  .service-card li::before,
  .service-card li + li::before {
    background: var(--gold);
    content: "";
    height: 3px;
    left: 0;
    position: absolute;
    top: 0.48em;
    transform: rotate(45deg);
    width: 3px;
  }

  .footer-links {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}