/* ==========================================================================
   FYINOVA — design system
   ========================================================================== */

:root {
  --ink: #05070a;
  --bg: #070a0f;
  --panel: #0a0f15;
  --panel-2: #0d141c;
  --panel-3: #111a24;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);
  --fg: #e9eff5;
  --muted: #8e9cab;
  --muted-2: #74828f;
  --brand: #3ed6f2;
  --brand-soft: rgba(62, 214, 242, 0.14);
  --blue: #2f6bff;
  --signal: #ff7a1a;
  --signal-hover: #ff8f3d;
  --radius: 16px;
  --radius-lg: 22px;
  --max: 1200px;
  --gutter: clamp(20px, 4vw, 40px);
  --section: clamp(64px, 7.2vw, 100px);
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "SF Mono", "SFMono-Regular", ui-monospace, "Cascadia Mono", Menlo, Consolas,
    monospace;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

[lang="zh-CN"] body {
  letter-spacing: 0.01em;
}

[lang="zh-CN"] .eyebrow {
  letter-spacing: 0.1em;
}

[lang="zh-CN"] .mono {
  letter-spacing: 0.06em;
}

h1,
h2,
h3,
h4,
p,
ul,
ol,
dl,
dd,
figure {
  margin: 0;
}

ul,
ol {
  padding: 0;
  list-style: none;
}

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

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

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

::selection {
  background: rgba(62, 214, 242, 0.3);
  color: #fff;
}

:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
  border-radius: 4px;
}

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

.icon {
  width: 20px;
  height: 20px;
  flex: none;
}

.mono {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.accent {
  color: var(--brand);
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  padding: 10px 16px;
  border-radius: 8px;
  background: var(--brand);
  color: #031014;
  font-weight: 600;
  transform: translateY(-200%);
  transition: transform 0.2s;
}

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

/* --------------------------------------------------------------------------
   Buttons & links
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 24px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition:
    background 0.2s var(--ease),
    border-color 0.2s var(--ease),
    color 0.2s var(--ease),
    transform 0.2s var(--ease),
    box-shadow 0.2s var(--ease);
  white-space: nowrap;
}

.btn .icon {
  width: 17px;
  height: 17px;
  transition: transform 0.25s var(--ease);
}

.btn:hover .icon {
  transform: translateX(3px);
}

.btn-primary {
  background: var(--signal);
  color: #150800;
  box-shadow: 0 10px 30px -14px rgba(255, 122, 26, 0.7);
}

.btn-primary:hover {
  background: var(--signal-hover);
  transform: translateY(-1px);
  box-shadow: 0 16px 34px -14px rgba(255, 122, 26, 0.8);
}

.btn-outline {
  border-color: var(--line-strong);
  color: var(--fg);
  background: transparent;
}

.btn-outline:hover {
  border-color: rgba(255, 255, 255, 0.36);
  background: rgba(255, 255, 255, 0.04);
}

.btn-sm {
  padding: 10px 16px;
  font-size: 13px;
  border-radius: 8px;
}

.btn-block {
  width: 100%;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--brand);
  font-size: 14px;
  font-weight: 500;
}

.text-link .icon {
  width: 16px;
  height: 16px;
  transition: transform 0.25s var(--ease);
}

.text-link:hover .icon {
  transform: translateX(4px);
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: 18px;
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(7, 10, 15, 0.72);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
  transition: background 0.25s;
}

.site-header.is-scrolled {
  background: rgba(7, 10, 15, 0.92);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: none;
}

.logo-mark {
  width: 36px;
  height: 36px;
  flex: none;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}

.brand-name {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.brand-sub {
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.16em;
  margin-top: 3px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.nav-group {
  position: relative;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 13.5px;
  color: rgba(233, 239, 245, 0.76);
  transition:
    color 0.2s,
    background 0.2s;
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--fg);
  background: rgba(255, 255, 255, 0.05);
}

.nav-link .chevron {
  width: 14px;
  height: 14px;
  opacity: 0.6;
  transition: transform 0.2s;
}

.nav-group:hover .chevron,
.nav-group:focus-within .chevron {
  transform: rotate(180deg);
}

.nav-menu {
  position: absolute;
  top: calc(100% + 10px);
  left: -12px;
  width: 318px;
  padding: 8px;
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  background: rgba(11, 17, 23, 0.98);
  box-shadow: 0 24px 60px -20px rgba(0, 0, 0, 0.9);
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition:
    opacity 0.2s var(--ease),
    transform 0.2s var(--ease),
    visibility 0.2s;
  z-index: 20;
}

.nav-group:hover .nav-menu,
.nav-group:focus-within .nav-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-menu-item {
  display: grid;
  grid-template-columns: 26px 1fr;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 13.5px;
  color: rgba(233, 239, 245, 0.8);
  transition:
    background 0.15s,
    color 0.15s;
}

.nav-menu-item:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--fg);
}

.nav-menu-index {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--muted-2);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: none;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 10px;
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
  transition:
    color 0.2s,
    background 0.2s;
}

.lang-switch .icon {
  width: 15px;
  height: 15px;
}

.lang-switch:hover {
  color: var(--fg);
  background: rgba(255, 255, 255, 0.05);
}

.menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  background: transparent;
  cursor: pointer;
  color: var(--fg);
}

.menu-btn .icon:last-child {
  display: none;
}

.menu-btn[aria-expanded="true"] .icon:first-child {
  display: none;
}

.menu-btn[aria-expanded="true"] .icon:last-child {
  display: block;
}

.mobile-nav {
  border-top: 1px solid var(--line);
  background: var(--bg);
  max-height: calc(100vh - 72px);
  overflow-y: auto;
}

.mobile-nav[hidden] {
  display: none;
}

.mobile-nav-inner {
  display: flex;
  flex-direction: column;
  padding: 12px 0 28px;
}

.mobile-link,
.mobile-group summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 15px 4px;
  border-bottom: 1px solid var(--line);
  font-size: 16px;
  cursor: pointer;
  list-style: none;
}

.mobile-group summary::-webkit-details-marker {
  display: none;
}

.mobile-group summary .icon {
  width: 16px;
  height: 16px;
  color: var(--muted);
  transition: transform 0.2s;
}

.mobile-group[open] summary .icon {
  transform: rotate(180deg);
}

.mobile-group ul {
  padding: 6px 0 10px;
}

.mobile-group li a {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 8px;
  padding: 10px 12px;
  font-size: 14px;
  color: var(--muted);
}

.mobile-group li a span {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--muted-2);
  padding-top: 2px;
}

.mobile-cta {
  margin-top: 22px;
}

.mobile-lang {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.mobile-lang .icon {
  width: 15px;
  height: 15px;
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */

.hero {
  position: relative;
  padding: clamp(48px, 7vw, 84px) 0 0;
  overflow: clip;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(48% 46% at 76% 34%, rgba(47, 107, 255, 0.16), transparent 72%),
    radial-gradient(38% 40% at 16% 6%, rgba(62, 214, 242, 0.09), transparent 70%);
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(70% 70% at 60% 40%, #000 20%, transparent 100%);
  -webkit-mask-image: radial-gradient(70% 70% at 60% 40%, #000 20%, transparent 100%);
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  align-items: center;
  gap: clamp(32px, 5vw, 64px);
  padding-bottom: clamp(44px, 6vw, 72px);
}

.hero-eyebrow {
  margin-bottom: 26px;
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 0 0 rgba(62, 214, 242, 0.5);
  animation: pulse 2.6s infinite;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(62, 214, 242, 0.45);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(62, 214, 242, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(62, 214, 242, 0);
  }
}

.hero h1 {
  font-size: clamp(2.9rem, 5.6vw, 4.6rem);
  line-height: 0.98;
  letter-spacing: -0.04em;
  font-weight: 650;
  margin: 0 0 26px;
}

[lang="zh-CN"] .hero h1 {
  letter-spacing: -0.015em;
  line-height: 1.1;
  font-weight: 600;
}

.hero h1 .accent {
  background: linear-gradient(100deg, #eaf9ff 0%, var(--brand) 58%, #2f9bff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lede {
  max-width: 560px;
  font-size: clamp(1rem, 1.3vw, 1.1rem);
  line-height: 1.75;
  color: var(--muted);
  margin-bottom: 34px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 26px;
}

.hero-note {
  font-size: 10px;
  color: var(--muted-2);
  letter-spacing: 0.14em;
}

.hero-visual {
  justify-self: end;
  width: min(100%, 520px);
}

/* Schematic */

.schematic {
  position: relative;
}

.schematic-frame {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 40px 26px 24px;
  background:
    radial-gradient(70% 60% at 50% 42%, rgba(47, 107, 255, 0.1), transparent 70%),
    linear-gradient(165deg, rgba(15, 23, 32, 0.92), rgba(7, 11, 16, 0.96));
  overflow: hidden;
}

.schematic-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: radial-gradient(80% 80% at 50% 50%, #000 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(80% 80% at 50% 50%, #000 30%, transparent 100%);
  pointer-events: none;
}

.corner {
  position: absolute;
  width: 14px;
  height: 14px;
  border-color: rgba(62, 214, 242, 0.55);
  border-style: solid;
  border-width: 0;
  z-index: 2;
}

.corner.tl {
  top: 12px;
  left: 12px;
  border-top-width: 1px;
  border-left-width: 1px;
}

.corner.tr {
  top: 12px;
  right: 12px;
  border-top-width: 1px;
  border-right-width: 1px;
}

.corner.bl {
  bottom: 12px;
  left: 12px;
  border-bottom-width: 1px;
  border-left-width: 1px;
}

.corner.br {
  bottom: 12px;
  right: 12px;
  border-bottom-width: 1px;
  border-right-width: 1px;
}

.schematic-meta,
.schematic-rev {
  position: absolute;
  top: 16px;
  font-size: 8.5px;
  color: var(--muted-2);
  letter-spacing: 0.18em;
  z-index: 2;
}

.schematic-meta {
  left: 28px;
}

.schematic-rev {
  right: 28px;
}

.schematic-svg {
  position: relative;
  width: 100%;
  height: auto;
  z-index: 1;
}

.schematic-path {
  animation: dash 26s linear infinite;
}

@keyframes dash {
  to {
    stroke-dashoffset: -220;
  }
}

.schematic-scan {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 120px;
  background: linear-gradient(180deg, transparent, rgba(62, 214, 242, 0.055), transparent);
  animation: scan 7s linear infinite;
  pointer-events: none;
  z-index: 3;
}

@keyframes scan {
  0% {
    transform: translateY(-140px);
  }
  100% {
    transform: translateY(620px);
  }
}

.schematic-caption {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 4px 0;
  font-size: 8.5px;
  color: var(--muted-2);
  letter-spacing: 0.16em;
}

/* Stat band */

.stat-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 26px 28px;
  border-left: 1px solid var(--line);
}

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

.stat-value {
  font-size: clamp(1.8rem, 2.6vw, 2.3rem);
  text-transform: none;
  letter-spacing: 0.02em;
  color: var(--fg);
  line-height: 1;
}

.stat-label {
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.02em;
}

/* --------------------------------------------------------------------------
   Sections
   -------------------------------------------------------------------------- */

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

.section-tight {
  padding-block: clamp(48px, 6vw, 80px);
}

.section-head {
  display: grid;
  grid-template-columns: 1fr minmax(280px, 400px);
  align-items: end;
  gap: 40px;
  padding-bottom: 34px;
  margin-bottom: 44px;
  border-bottom: 1px solid var(--line);
}

.section-title {
  font-size: clamp(1.85rem, 3.1vw, 2.7rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
  font-weight: 600;
}

[lang="zh-CN"] .section-title {
  letter-spacing: -0.01em;
  line-height: 1.25;
}

.section-note {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 420px;
  justify-self: end;
}

.section-foot {
  margin-top: 36px;
}

/* Reveal */

.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 0.75s var(--ease),
    transform 0.75s var(--ease);
}

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

/* --------------------------------------------------------------------------
   Capabilities
   -------------------------------------------------------------------------- */

.cap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.cap-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 206px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(170deg, rgba(15, 23, 32, 0.6), rgba(8, 12, 17, 0.4));
  overflow: hidden;
  transition:
    border-color 0.25s,
    background 0.25s,
    transform 0.25s var(--ease),
    box-shadow 0.25s;
}

.cap-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(60% 50% at 80% 0%, rgba(62, 214, 242, 0.12), transparent 70%);
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}

.cap-card:hover {
  border-color: rgba(62, 214, 242, 0.42);
  transform: translateY(-3px);
  box-shadow: 0 24px 50px -30px rgba(0, 0, 0, 0.9);
}

.cap-card:hover::after {
  opacity: 1;
}

.cap-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 26px;
}

.cap-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(62, 214, 242, 0.25);
  border-radius: 11px;
  background: rgba(62, 214, 242, 0.06);
  color: var(--brand);
}

.cap-icon .icon {
  width: 22px;
  height: 22px;
}

.cap-index {
  font-size: 10px;
  color: var(--muted-2);
  padding-top: 5px;
}

.cap-card h3 {
  font-size: 18.5px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.3;
  margin-bottom: 8px;
}

[lang="zh-CN"] .cap-card h3 {
  font-size: 17px;
}

.cap-card p {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--muted);
  max-width: 30ch;
}

.cap-arrow {
  position: absolute;
  right: 22px;
  bottom: 22px;
  color: var(--muted-2);
  opacity: 0.35;
  transform: translate(-4px, 4px);
  transition:
    opacity 0.25s,
    transform 0.25s var(--ease),
    color 0.25s;
}

.cap-arrow .icon {
  width: 18px;
  height: 18px;
}

.cap-card:hover .cap-arrow {
  opacity: 1;
  transform: none;
  color: var(--brand);
}

/* --------------------------------------------------------------------------
   Pain
   -------------------------------------------------------------------------- */

.pain-section {
  position: relative;
  border-block: 1px solid var(--line);
  background:
    radial-gradient(50% 60% at 10% 20%, rgba(255, 122, 26, 0.05), transparent 70%),
    linear-gradient(180deg, rgba(13, 20, 28, 0.7), rgba(7, 10, 15, 0.9));
}

.pain-layout {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: start;
}

.pain-intro .section-note {
  justify-self: start;
  max-width: 380px;
  margin-top: 20px;
}

.pain-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.pain-item {
  padding: 28px 26px;
  background: var(--bg);
  min-height: 170px;
}

.pain-index {
  display: block;
  font-size: 10px;
  color: var(--signal);
  letter-spacing: 0.14em;
  margin-bottom: 16px;
}

.pain-item h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 8px;
}

.pain-item p {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

.pain-grid.compact .pain-item {
  min-height: 0;
  padding: 22px;
}

/* --------------------------------------------------------------------------
   Process
   -------------------------------------------------------------------------- */

.process {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 22px;
  counter-reset: step;
}

.process-step {
  position: relative;
  padding-top: 52px;
}

.process-step::before {
  content: "";
  position: absolute;
  top: 17px;
  left: 0;
  right: -22px;
  height: 1px;
  background: var(--line);
}

.process-step:last-child::before {
  right: 0;
}

.process-node {
  position: absolute;
  top: 0;
  left: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 35px;
  height: 35px;
  border: 1px solid rgba(62, 214, 242, 0.4);
  border-radius: 50%;
  background: var(--bg);
  color: var(--brand);
  font-size: 10px;
  z-index: 1;
}

.process-step h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.process-step p {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* --------------------------------------------------------------------------
   Cases
   -------------------------------------------------------------------------- */

.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.case-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
  transition:
    border-color 0.25s,
    transform 0.3s var(--ease);
}

.case-card:hover {
  border-color: rgba(62, 214, 242, 0.4);
  transform: translateY(-4px);
}

.case-art {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.case-art.is-wide {
  aspect-ratio: 21 / 9;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.case-art svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transform: scale(1.02);
  transition: transform 0.6s var(--ease);
}

.case-card:hover .case-art svg {
  transform: scale(1.06);
}

.tone-cyan {
  background:
    radial-gradient(70% 100% at 80% 60%, rgba(62, 214, 242, 0.2), transparent 65%),
    linear-gradient(145deg, #071e26, #060b10 70%);
}

.tone-blue {
  background:
    radial-gradient(70% 100% at 80% 60%, rgba(47, 107, 255, 0.28), transparent 65%),
    linear-gradient(145deg, #0a1430, #060b10 70%);
}

.tone-amber {
  background:
    radial-gradient(70% 100% at 80% 60%, rgba(255, 122, 26, 0.2), transparent 65%),
    linear-gradient(145deg, #241305, #060b10 70%);
}

.case-art-index {
  position: absolute;
  left: 18px;
  bottom: 6px;
  font-size: clamp(56px, 7vw, 88px);
  line-height: 1;
  letter-spacing: -0.04em;
  color: rgba(255, 255, 255, 0.09);
  font-weight: 600;
}

.case-chip {
  display: inline-flex;
  align-items: center;
  padding: 5px 10px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background: rgba(5, 8, 12, 0.55);
  backdrop-filter: blur(6px);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: rgba(233, 239, 245, 0.86);
}

.case-art .case-chip {
  position: absolute;
  top: 16px;
  left: 16px;
}

.case-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 22px;
}

.case-meta {
  display: flex;
  gap: 14px;
  color: var(--muted-2);
  font-size: 9.5px;
  margin-bottom: 12px;
}

.case-body h3 {
  font-size: 17.5px;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.01em;
  margin-bottom: 9px;
}

[lang="zh-CN"] .case-body h3 {
  font-size: 16px;
  line-height: 1.5;
}

.case-body p {
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
  margin-bottom: 20px;
}

.case-body .text-link {
  margin-top: auto;
  font-size: 12.5px;
}

.case-grid:has(> .case-card:only-child) {
  grid-template-columns: 1fr;
}

.case-grid:has(> .case-card:only-child) .case-card {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  align-items: stretch;
}

.case-grid:has(> .case-card:only-child) .case-art {
  height: 100%;
  aspect-ratio: auto;
  border-bottom: 0;
  border-right: 1px solid var(--line);
}

.case-grid:has(> .case-card:only-child) .case-body {
  justify-content: center;
  padding: 32px;
}

.sample-note {
  margin-top: 28px;
  font-size: 12px;
  color: var(--muted-2);
}

/* --------------------------------------------------------------------------
   Stack marquee
   -------------------------------------------------------------------------- */

.stack-section {
  border-block: 1px solid var(--line);
  padding-block: clamp(48px, 6vw, 72px);
  background: linear-gradient(180deg, rgba(13, 20, 28, 0.45), transparent);
  overflow: hidden;
}

.stack-head {
  display: grid;
  grid-template-columns: auto 1fr minmax(260px, 380px);
  align-items: baseline;
  gap: 20px 32px;
}

.stack-head .eyebrow {
  margin: 0;
}

.stack-head h2 {
  font-size: clamp(1.3rem, 2vw, 1.7rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.stack-head p {
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

.marquee {
  margin-top: 42px;
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}

.marquee-track {
  display: flex;
  width: max-content;
  animation: marquee 42s linear infinite;
}

.marquee:hover .marquee-track {
  animation-play-state: paused;
}

.marquee-list {
  display: flex;
  align-items: center;
  flex: none;
}

.marquee-list li {
  display: flex;
  align-items: center;
  gap: 36px;
  padding-right: 36px;
  font-family: var(--font-mono);
  font-size: 16px;
  letter-spacing: 0.02em;
  color: rgba(233, 239, 245, 0.42);
  white-space: nowrap;
}

.marquee-list li::after {
  content: "/";
  color: rgba(255, 255, 255, 0.14);
  font-size: 14px;
}

@keyframes marquee {
  to {
    transform: translateX(-50%);
  }
}

/* --------------------------------------------------------------------------
   FAQ
   -------------------------------------------------------------------------- */

.faq-layout {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: start;
}

.faq-intro .section-note {
  margin-top: 18px;
  justify-self: start;
}

.faq-item {
  border-top: 1px solid var(--line);
}

.faq-item:last-child {
  border-bottom: 1px solid var(--line);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 21px 4px;
  font-size: 15.5px;
  font-weight: 500;
  cursor: pointer;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary .icon {
  width: 18px;
  height: 18px;
  color: var(--muted);
  transition: transform 0.25s var(--ease);
  flex: none;
}

.faq-item[open] summary .icon {
  transform: rotate(45deg);
  color: var(--brand);
}

.faq-answer {
  padding: 0 40px 22px 4px;
}

.faq-answer p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* --------------------------------------------------------------------------
   CTA
   -------------------------------------------------------------------------- */

.cta-section {
  padding-bottom: var(--section);
}

.cta-panel {
  position: relative;
  display: grid;
  grid-template-columns: 1.35fr auto;
  align-items: center;
  gap: 40px;
  padding: clamp(36px, 5vw, 60px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(140deg, rgba(16, 25, 35, 0.9), rgba(7, 10, 15, 0.95)),
    var(--panel);
  overflow: hidden;
}

.cta-glow {
  position: absolute;
  right: -10%;
  top: -60%;
  width: 60%;
  height: 200%;
  background: radial-gradient(50% 50% at 50% 50%, rgba(47, 107, 255, 0.22), transparent 70%);
  pointer-events: none;
}

.cta-copy h2 {
  font-size: clamp(1.7rem, 3vw, 2.5rem);
  line-height: 1.12;
  letter-spacing: -0.03em;
  font-weight: 600;
  margin-bottom: 14px;
}

[lang="zh-CN"] .cta-copy h2 {
  letter-spacing: -0.01em;
}

.cta-copy p {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--muted);
  max-width: 600px;
}

.cta-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.site-footer {
  border-top: 1px solid var(--line);
  background: #06090d;
  padding-top: clamp(48px, 6vw, 72px);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 0.8fr 1.25fr;
  gap: 40px;
  padding-bottom: 48px;
}

.footer-brand .brand {
  margin-bottom: 18px;
}

.footer-tagline {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
  max-width: 300px;
  margin-bottom: 16px;
}

.footer-response {
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--muted-2);
}

.footer-response .icon {
  width: 14px;
  height: 14px;
}

.footer-col h3 {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted-2);
  margin-bottom: 18px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a,
.footer-col li {
  font-size: 13px;
  color: var(--muted);
  transition: color 0.2s;
}

.footer-col a:hover {
  color: var(--fg);
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 9px;
}

.footer-contact .icon {
  width: 15px;
  height: 15px;
  margin-top: 2px;
  color: var(--muted-2);
  flex: none;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 0 28px;
  border-top: 1px solid var(--line);
  font-size: 11px;
  color: var(--muted-2);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.04em;
}

.footer-legal a:hover {
  color: var(--fg);
}

/* --------------------------------------------------------------------------
   Page hero / breadcrumbs
   -------------------------------------------------------------------------- */

.page-hero {
  padding: clamp(48px, 6vw, 80px) 0 clamp(36px, 4vw, 52px);
  position: relative;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(50% 80% at 15% 0%, rgba(47, 107, 255, 0.1), transparent 70%);
  pointer-events: none;
}

.page-hero .container {
  position: relative;
}

.page-title {
  font-size: clamp(2.4rem, 4.6vw, 3.8rem);
  line-height: 1.05;
  letter-spacing: -0.035em;
  font-weight: 620;
  max-width: 16ch;
}

[lang="zh-CN"] .page-title {
  letter-spacing: -0.01em;
  line-height: 1.2;
  max-width: 20ch;
  font-weight: 600;
}

.page-lede {
  max-width: 680px;
  margin-top: 22px;
  font-size: 16.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-meta {
  margin-top: 22px;
  color: var(--muted-2);
}

.breadcrumbs {
  padding-top: 26px;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted-2);
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: 10px;
}

.breadcrumbs li:not(:last-child)::after {
  content: "/";
  color: rgba(255, 255, 255, 0.18);
}

.breadcrumbs a:hover {
  color: var(--fg);
}

/* --------------------------------------------------------------------------
   Service index
   -------------------------------------------------------------------------- */

.service-list {
  border-top: 1px solid var(--line);
}

.service-row {
  display: grid;
  grid-template-columns: 54px 56px 1fr 40px;
  align-items: center;
  gap: 20px;
  padding: 26px 8px;
  border-bottom: 1px solid var(--line);
  transition:
    background 0.25s,
    padding 0.25s var(--ease);
}

.service-row:hover {
  background: rgba(255, 255, 255, 0.025);
  padding-left: 18px;
}

.service-row-index {
  font-size: 10px;
  color: var(--muted-2);
}

.service-row-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  color: var(--brand);
  background: rgba(62, 214, 242, 0.04);
}

.service-row-main {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.service-row-title {
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.015em;
}

[lang="zh-CN"] .service-row-title {
  font-size: 19px;
}

.service-row-desc {
  font-size: 13.5px;
  color: var(--muted);
}

.service-row-arrow {
  color: var(--muted-2);
  justify-self: end;
  transition:
    color 0.2s,
    transform 0.25s var(--ease);
}

.service-row:hover .service-row-arrow {
  color: var(--brand);
  transform: translate(2px, -2px);
}

/* --------------------------------------------------------------------------
   Detail pages
   -------------------------------------------------------------------------- */

.detail-hero {
  padding: clamp(40px, 5vw, 64px) 0 clamp(40px, 5vw, 64px);
  border-bottom: 1px solid var(--line);
}

.detail-hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(32px, 6vw, 72px);
  align-items: end;
}

.detail-title {
  font-size: clamp(2.1rem, 4vw, 3.4rem);
  line-height: 1.06;
  letter-spacing: -0.035em;
  font-weight: 620;
  max-width: 18ch;
}

[lang="zh-CN"] .detail-title {
  letter-spacing: -0.01em;
  line-height: 1.2;
  font-weight: 600;
  max-width: 22ch;
}

.detail-title.narrow {
  max-width: 24ch;
}

.detail-tagline {
  margin-top: 18px;
  font-size: 17px;
  line-height: 1.55;
  color: var(--muted);
  max-width: 46ch;
}

.detail-summary {
  display: flex;
  flex-direction: column;
  gap: 14px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
  border-left: 1px solid var(--line);
  padding-left: 28px;
}

[lang="zh-CN"] .detail-summary {
  font-size: 15px;
}

.detail-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: clamp(36px, 5vw, 72px);
  padding-block: clamp(40px, 5vw, 64px);
}

.detail-aside {
  position: sticky;
  top: 100px;
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.aside-block {
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.aside-title {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.18em;
  color: var(--muted-2);
  margin-bottom: 14px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.chips li {
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.spec-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.spec-list div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 12.5px;
}

.spec-list dt {
  color: var(--muted-2);
}

.spec-list dd {
  color: var(--fg);
  text-align: right;
  font-size: 11px;
  letter-spacing: 0.02em;
}

.detail-main {
  min-width: 0;
}

.detail-section {
  padding-bottom: 44px;
  margin-bottom: 44px;
  border-bottom: 1px solid var(--line);
}

.detail-section:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.detail-section-title {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin-bottom: 26px;
}

[lang="zh-CN"] .detail-section-title {
  font-size: 20px;
}

.approach-list {
  counter-reset: approach;
}

.approach-list li {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 18px;
  padding: 17px 0;
  border-top: 1px solid var(--line);
}

.approach-list li:last-child {
  border-bottom: 1px solid var(--line);
}

.approach-index {
  font-size: 10px;
  color: var(--brand);
  padding-top: 4px;
}

.approach-list p {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--muted);
}

.check-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px 24px;
}

.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--muted);
}

.check-list .icon {
  width: 17px;
  height: 17px;
  color: var(--brand);
  margin-top: 2px;
}

.next-link-wrap {
  padding-bottom: 20px;
}

.next-link {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 20px;
  padding: 30px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: color 0.2s;
}

.next-link span:first-child {
  font-size: 9.5px;
  letter-spacing: 0.18em;
  color: var(--muted-2);
}

.next-link span:nth-child(2) {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.next-link .icon {
  color: var(--muted-2);
  transition: transform 0.25s var(--ease);
}

.next-link:hover span:nth-child(2) {
  color: var(--brand);
}

.next-link:hover .icon {
  color: var(--brand);
  transform: translateX(5px);
}

/* --------------------------------------------------------------------------
   Solutions
   -------------------------------------------------------------------------- */

.solution-list {
  display: flex;
  flex-direction: column;
  gap: 26px;
}

.solution-row {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--panel);
  overflow: hidden;
  transition:
    border-color 0.25s,
    transform 0.3s var(--ease);
}

.solution-row:hover {
  border-color: rgba(62, 214, 242, 0.35);
  transform: translateY(-2px);
}

.solution-row .case-art {
  height: 100%;
  min-height: 280px;
  border: 0;
  border-right: 1px solid var(--line);
  border-radius: 0;
  aspect-ratio: auto;
}

.solution-row-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(28px, 4vw, 48px);
}

.solution-row-index {
  font-size: 10px;
  color: var(--brand);
  margin-bottom: 14px;
}

.solution-row-body h2 {
  font-size: clamp(1.55rem, 2.4vw, 2rem);
  font-weight: 600;
  letter-spacing: -0.025em;
  margin-bottom: 10px;
}

[lang="zh-CN"] .solution-row-body h2 {
  letter-spacing: -0.01em;
}

.solution-row-body p {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--muted);
  margin-bottom: 24px;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.scenario-card {
  padding: 30px;
  background: var(--bg);
}

.scenario-index {
  display: block;
  font-size: 9.5px;
  color: var(--muted-2);
  margin-bottom: 16px;
}

.scenario-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.scenario-card p {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

.architecture-layout {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: clamp(36px, 6vw, 80px);
  align-items: start;
}

.arch-list {
  border-top: 1px solid var(--line);
}

.arch-list li {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 20px;
  padding: 24px 4px;
  border-bottom: 1px solid var(--line);
}

.arch-index {
  font-size: 10px;
  color: var(--brand);
  padding-top: 3px;
}

.arch-list h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.arch-list p {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

.outcome-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.outcome-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 30px 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(165deg, rgba(16, 24, 33, 0.7), rgba(8, 12, 17, 0.4));
}

.outcome-value {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  letter-spacing: -0.02em;
  color: var(--brand);
  line-height: 1;
}

.outcome-label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* --------------------------------------------------------------------------
   Case detail
   -------------------------------------------------------------------------- */

.case-detail-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-bottom: 22px;
  color: var(--muted-2);
  font-size: 10px;
}

.case-detail-art {
  margin-top: 40px;
}

.case-body-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(36px, 6vw, 80px);
  padding-block: clamp(40px, 5vw, 64px);
}

.bullet-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.bullet-list li {
  position: relative;
  padding-left: 22px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--muted);
}

.bullet-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 7px;
  height: 1px;
  background: var(--brand);
}

.case-extra {
  display: grid;
  grid-template-columns: minmax(0, 760px);
  gap: clamp(36px, 6vw, 80px);
}

.link-list {
  border-top: 1px solid var(--line);
}

.link-list a {
  display: grid;
  grid-template-columns: 42px 1fr 20px;
  align-items: center;
  gap: 12px;
  padding: 15px 2px;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  color: var(--muted);
  transition: color 0.2s;
}

.link-list a span:first-child {
  font-size: 9.5px;
  color: var(--muted-2);
}

.link-list a .icon {
  width: 16px;
  height: 16px;
  justify-self: end;
  opacity: 0.6;
}

.link-list a:hover {
  color: var(--fg);
}

/* --------------------------------------------------------------------------
   About
   -------------------------------------------------------------------------- */

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: clamp(36px, 6vw, 80px);
  align-items: start;
}

.about-body {
  display: flex;
  flex-direction: column;
  gap: 20px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

.about-body p:first-child {
  font-size: 18px;
  color: rgba(233, 239, 245, 0.88);
}

.coordinate-card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(165deg, rgba(16, 24, 33, 0.72), rgba(8, 12, 17, 0.5));
}

.coordinate-card > span {
  display: block;
  font-size: 9.5px;
  color: var(--muted-2);
  margin-bottom: 10px;
}

.coordinate-card strong {
  display: block;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--brand);
  margin-bottom: 20px;
}

.coordinate-card svg {
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(5, 8, 12, 0.6);
  margin-bottom: 16px;
}

.coordinate-card p {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.6;
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.value-card {
  padding: 30px;
  background: var(--bg);
}

.value-index {
  display: block;
  font-size: 9.5px;
  color: var(--brand);
  margin-bottom: 16px;
}

.value-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.value-card p {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

.discipline-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.discipline {
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.discipline-dot {
  display: block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brand);
  margin-bottom: 18px;
  box-shadow: 0 0 12px rgba(62, 214, 242, 0.5);
}

.discipline h3 {
  font-size: 15.5px;
  font-weight: 600;
  margin-bottom: 7px;
}

.discipline p {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.location-band {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 32px;
  margin-top: 56px;
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(150deg, rgba(16, 24, 33, 0.72), rgba(8, 12, 17, 0.4));
}

.location-band h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
}

.location-band p {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
  max-width: 640px;
}

/* --------------------------------------------------------------------------
   Contact
   -------------------------------------------------------------------------- */

.contact-hero {
  padding: clamp(48px, 6vw, 80px) 0 clamp(28px, 4vw, 44px);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

.form-panel {
  padding: clamp(24px, 3vw, 36px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(170deg, rgba(15, 23, 32, 0.7), rgba(8, 12, 17, 0.5));
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.field-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

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

.field label {
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.req {
  color: var(--signal);
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  background: rgba(4, 7, 10, 0.6);
  color: var(--fg);
  font-size: 14px;
  transition:
    border-color 0.2s,
    box-shadow 0.2s,
    background 0.2s;
}

.field textarea {
  resize: vertical;
  min-height: 120px;
  line-height: 1.65;
}

.field input::placeholder,
.field textarea::placeholder {
  color: #4e5b68;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: rgba(62, 214, 242, 0.6);
  box-shadow: 0 0 0 3px rgba(62, 214, 242, 0.1);
  background: rgba(4, 7, 10, 0.85);
}

.field select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%238e9cab' stroke-width='1.6'%3E%3Cpath d='m6 9.5 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

.field select option {
  background: #0d141c;
  color: var(--fg);
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  margin-top: 4px;
}

.form-privacy {
  flex: 1;
  min-width: 220px;
  font-size: 11px;
  line-height: 1.6;
  color: var(--muted-2);
}

.form-status {
  display: none;
  padding: 12px 14px;
  border-radius: 8px;
  font-size: 13px;
  line-height: 1.6;
}

.form-status.is-visible {
  display: block;
}

.form-status.is-success {
  border: 1px solid rgba(62, 214, 242, 0.3);
  background: rgba(62, 214, 242, 0.08);
  color: var(--brand);
}

.form-status.is-error {
  border: 1px solid rgba(255, 90, 90, 0.3);
  background: rgba(255, 90, 90, 0.08);
  color: #ff8a8a;
}

.field.has-error input,
.field.has-error textarea {
  border-color: rgba(255, 90, 90, 0.6);
}

.contact-aside {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-card,
.response-card,
.contact-note {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.contact-card h2 {
  font-size: 9.5px;
  color: var(--muted-2);
  margin-bottom: 18px;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.contact-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: 9px;
  color: var(--brand);
  flex: none;
}

.contact-icon .icon {
  width: 16px;
  height: 16px;
}

.contact-text {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.contact-text .mono {
  font-size: 9px;
  color: var(--muted-2);
}

.contact-text a,
.contact-text > span:last-child {
  font-size: 13.5px;
  color: var(--fg);
  word-break: break-word;
}

.contact-text a:hover {
  color: var(--brand);
}

.response-card {
  display: flex;
  gap: 14px;
  background: linear-gradient(160deg, rgba(62, 214, 242, 0.07), rgba(10, 15, 21, 0.6));
}

.response-card > .icon {
  color: var(--brand);
  flex: none;
  margin-top: 2px;
}

.response-card h3 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
}

.response-card p {
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}

.contact-note .mono {
  color: var(--brand);
  font-size: 10px;
  margin-bottom: 8px;
}

.contact-note p:last-child {
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted-2);
}

.contact-footer-band {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  padding-top: 36px;
  border-top: 1px solid var(--line);
}

.contact-footer-band h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  letter-spacing: -0.02em;
  font-weight: 600;
}

.contact-footer-band h2 a:hover {
  color: var(--brand);
}

.contact-footer-band > p {
  font-size: 12px;
  color: var(--muted-2);
}

/* --------------------------------------------------------------------------
   Prose / 404
   -------------------------------------------------------------------------- */

.prose {
  max-width: 760px;
}

.prose section {
  padding-bottom: 28px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--line);
}

.prose h2 {
  font-size: 19px;
  font-weight: 600;
  margin-bottom: 12px;
}

.prose p {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.prose-contact {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
}

.prose-contact a {
  color: var(--brand);
}

.not-found {
  padding-block: clamp(100px, 16vw, 180px);
}

.error-code {
  font-size: 12px;
  color: var(--signal);
  letter-spacing: 0.3em;
  margin-bottom: 20px;
}

.not-found h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.12;
  letter-spacing: -0.03em;
  font-weight: 600;
  max-width: 18ch;
  margin-bottom: 18px;
}

.not-found p:not(.error-code) {
  font-size: 15px;
  color: var(--muted);
  margin-bottom: 32px;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1080px) {
  .nav {
    display: none;
  }

  .menu-btn {
    display: inline-flex;
  }

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

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero-visual {
    justify-self: start;
    width: min(100%, 480px);
  }

  .hero-note {
    display: none;
  }

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

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

  .case-grid .case-card:last-child {
    grid-column: span 2;
  }

  .footer-grid {
    grid-template-columns: 1.4fr 1fr;
  }

  .footer-contact {
    grid-column: span 2;
  }

  .footer-contact ul {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 12px 32px;
  }

  .stack-head {
    grid-template-columns: 1fr;
  }

  .stack-head h2 {
    margin-top: 4px;
  }

  .detail-layout {
    grid-template-columns: 1fr;
  }

  .detail-aside {
    position: static;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    padding: 28px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--panel);
  }

  .detail-aside .btn-block {
    grid-column: span 2;
  }

  .detail-aside .aside-block {
    padding-top: 0;
    border-top: 0;
  }

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

  .contact-aside {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-note {
    grid-column: span 2;
  }
}

@media (max-width: 900px) {
  .section-head {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .section-note {
    justify-self: start;
  }

  .pain-layout,
  .faq-layout,
  .architecture-layout,
  .about-grid {
    grid-template-columns: 1fr;
  }

  .pain-grid {
    margin-top: 8px;
  }

  .process {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
  }

  .process-step::before {
    display: none;
  }

  .discipline-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
  }

  .detail-hero-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .detail-summary {
    border-left: 0;
    border-top: 1px solid var(--line);
    padding-left: 0;
    padding-top: 24px;
  }

  .solution-row {
    grid-template-columns: 1fr;
  }

  .solution-row .case-art {
    min-height: 220px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

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

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

  .case-grid .case-card:last-child {
    grid-column: auto;
  }

  .case-body-grid,
  .case-extra {
    grid-template-columns: 1fr;
    gap: 36px;
  }

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

  .cta-panel {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .cta-actions {
    flex-direction: row;
    flex-wrap: wrap;
  }

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

  .footer-brand {
    grid-column: span 2;
  }

  .footer-contact {
    grid-column: span 2;
  }

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

  .contact-aside {
    grid-template-columns: 1fr;
  }

  .contact-note {
    grid-column: auto;
  }
}

@media (max-width: 720px) {
  .header-cta {
    display: none;
  }

  .brand-sub {
    display: none;
  }

  .hero {
    padding-top: 40px;
  }

  .hero h1 {
    font-size: clamp(2.4rem, 9vw, 3.2rem);
  }

  .stat-band {
    grid-template-columns: repeat(2, 1fr);
  }

  .stat {
    padding: 20px;
  }

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

  .stat:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }

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

  .cap-card {
    min-height: 0;
    padding: 22px;
  }

  .schematic-rev {
    display: none;
  }

  .case-grid:has(> .case-card:only-child) .case-card {
    display: flex;
    flex-direction: column;
  }

  .case-grid:has(> .case-card:only-child) .case-art {
    aspect-ratio: 16 / 9;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .case-grid:has(> .case-card:only-child) .case-body {
    padding: 22px;
  }

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

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

  .process-step {
    padding-top: 0;
    padding-left: 52px;
  }

  .process-node {
    top: -4px;
  }

  .check-list {
    grid-template-columns: 1fr;
  }

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

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

  .location-band {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .field-row {
    grid-template-columns: 1fr;
  }

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

  .footer-legal {
    gap: 12px;
  }

  .service-row {
    grid-template-columns: 40px 44px 1fr;
    gap: 14px;
  }

  .service-row-icon {
    width: 40px;
    height: 40px;
  }

  .service-row-arrow {
    display: none;
  }

  .service-row-title {
    font-size: 17px;
  }

  .detail-aside {
    grid-template-columns: 1fr;
  }

  .detail-aside .btn-block {
    grid-column: auto;
  }

  .next-link {
    grid-template-columns: 1fr auto;
  }

  .next-link span:first-child {
    grid-column: span 2;
  }

  .next-link span:nth-child(2) {
    font-size: 19px;
  }

  .cta-section .btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .hero-actions .btn {
    width: 100%;
  }

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

  .footer-brand,
  .footer-contact {
    grid-column: auto;
  }

  .footer-contact ul {
    flex-direction: column;
  }

  .form-actions .btn {
    width: 100%;
  }
}

/* --------------------------------------------------------------------------
   Motion preferences
   -------------------------------------------------------------------------- */

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

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .js [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .marquee-track {
    animation: none;
  }
}