/* CreAIte · 造物者公司主页
   Design tokens aligned with the CreAIte logo */

:root {
  --brand: #0D2753;
  --brand-hover: #081C3D;
  --glow: #7FB6D9;
  --accent: #3E88B3;
  --ink: #0B1F2A;
  --muted: #4A6068;
  --bg: #FFFFFF;
  --surface: #F6FAFD;
  --mint: #EDF6FC;
  --border: #DDEAF3;
  --footer: #0B1F2A;
  --radius: 8px;
  --radius-sm: 8px;
  --shadow: 0 8px 28px rgba(13, 39, 83, 0.06);
  --shadow-lg: 0 18px 48px rgba(13, 39, 83, 0.1);
  --max: 1120px;
  --nav-h: 72px;
  --font: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", "Hiragino Sans GB",
    system-ui, -apple-system, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 12px);
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.container {
  width: min(100% - 40px, var(--max));
  margin-inline: auto;
}

.section {
  padding: 88px 0;
}

.section--surface {
  background: var(--surface);
}

.section--mint {
  background: var(--mint);
}

.section__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: 12px;
}

.section__eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--glow), var(--brand));
}

.section__title {
  margin: 0 0 14px;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.section__lead {
  margin: 0;
  max-width: 640px;
  color: var(--muted);
  font-size: 17px;
}

.section__head {
  margin-bottom: 40px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  transition: transform 0.15s ease, background 0.15s ease, box-shadow 0.15s ease,
    color 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 8px 20px rgba(13, 39, 83, 0.22);
}

.btn--primary:hover {
  background: var(--brand-hover);
}

.btn--ghost {
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--border);
}

.btn--ghost:hover {
  border-color: var(--brand);
  color: var(--brand);
}

.btn--dark {
  background: #fff;
  color: var(--ink);
}

.btn--outline-light {
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: #fff;
}

.btn--outline-light:hover {
  background: rgba(255, 255, 255, 0.1);
}

.btn--sm {
  padding: 8px 14px;
  font-size: 13px;
}

/* ---------- Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--border);
  box-shadow: 0 4px 20px rgba(13, 39, 83, 0.05);
}

.nav {
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  font-size: 18px;
  letter-spacing: -0.01em;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

/* ---------- Why / Differentiation ---------- */
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.why-card {
  padding: 26px 22px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
}

.why-card h3 {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 800;
}

.why-card p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

@media (max-width: 960px) {
  .why-grid {
    grid-template-columns: 1fr;
  }
}

.brand__sub {
  display: block;
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.04em;
  margin-top: 1px;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav__links a {
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
  transition: color 0.15s ease, background 0.15s ease;
}

.nav__links a:hover {
  color: var(--ink);
  background: var(--mint);
}

.nav__cta {
  margin-left: 8px;
}

.nav__links .nav__cta,
.nav__links .nav__cta:hover {
  color: #fff;
  background: var(--brand);
}

.nav__toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  border: 1px solid var(--border);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.nav__toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-header.is-open .nav__toggle span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.site-header.is-open .nav__toggle span:nth-child(2) {
  opacity: 0;
}
.site-header.is-open .nav__toggle span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: calc(100svh - var(--nav-h));
  padding: 88px 0 72px;
  overflow: hidden;
  display: grid;
  align-items: center;
  background: #eff6fb;
}

.hero__image {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(246, 250, 253, 0.96) 0%, rgba(246, 250, 253, 0.9) 33%, rgba(246, 250, 253, 0.34) 58%, rgba(246, 250, 253, 0.08) 100%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0.7) 100%),
    url("/assets/home/img/hero-ai-systems.webp") center / cover no-repeat;
}

.hero__content {
  position: relative;
  z-index: 1;
}

.hero__copy {
  max-width: 640px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--mint);
  border: 1px solid rgba(62, 136, 179, 0.24);
  color: var(--brand);
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 20px;
}

.hero__title {
  margin: 0 0 18px;
  font-size: clamp(40px, 6vw, 60px);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.hero__title em {
  font-style: normal;
  background: linear-gradient(120deg, var(--brand) 0%, #2D6F9F 56%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__subtitle {
  margin: 0 0 12px;
  font-size: clamp(17px, 2.2vw, 20px);
  font-weight: 600;
  color: var(--ink);
  line-height: 1.5;
  max-width: 34em;
}

.hero__support {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 16px;
  max-width: 38em;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 40px;
}

.hero__proof {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  max-width: 900px;
}

.hero__proof-item {
  padding: 16px 14px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(221, 234, 243, 0.92);
  box-shadow: 0 12px 28px rgba(13, 39, 83, 0.07);
  backdrop-filter: blur(12px);
}

.hero__proof-item strong {
  display: block;
  margin-bottom: 3px;
  font-size: 14px;
  font-weight: 900;
}

.hero__proof-item span {
  display: block;
  font-size: 12px;
  color: var(--muted);
  font-weight: 600;
}

/* ---------- Problem ---------- */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 36px;
}

.break-card {
  position: relative;
  padding: 24px 20px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.break-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--accent);
}

.break-card__tag {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 6px;
  background: rgba(62, 136, 179, 0.12);
  color: var(--brand);
  font-size: 12px;
  font-weight: 800;
  margin-bottom: 12px;
}

.break-card h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 800;
}

.break-card p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

.problem-quote {
  margin: 32px 0 0;
  padding: 20px 24px;
  border-radius: var(--radius);
  background: var(--ink);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
}

.problem-quote strong {
  color: var(--glow);
}

/* ---------- Services ---------- */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.service-card {
  display: flex;
  flex-direction: column;
  padding: 28px 24px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(62, 136, 179, 0.36);
}

.service-card__icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: var(--mint);
  color: var(--brand);
  margin-bottom: 18px;
}

.service-card__icon svg {
  width: 24px;
  height: 24px;
}

.service-card h3 {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 800;
}

.service-card__who {
  margin: 0 0 14px;
  font-size: 13px;
  font-weight: 700;
  color: var(--brand);
}

.service-card p {
  margin: 0 0 16px;
  font-size: 14px;
  color: var(--muted);
  flex: 1;
}

.service-card__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.pill {
  display: inline-flex;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
}

.service-card__deliver {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px dashed var(--border);
  font-size: 13px;
  color: var(--ink);
}

.service-card__deliver strong {
  color: var(--brand);
}

/* ---------- Method ---------- */
.method-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 28px;
}

.method-step {
  padding: 22px 18px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--border);
  text-align: center;
  position: relative;
}

.method-step__n {
  width: 36px;
  height: 36px;
  margin: 0 auto 12px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 900;
  font-size: 14px;
  color: #fff;
  background: linear-gradient(135deg, var(--glow), var(--brand));
}

.method-step h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 800;
}

.method-step p {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
}

.loop {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
  margin-bottom: 20px;
}

.loop__item {
  padding: 14px 10px;
  border-radius: 12px;
  background: var(--mint);
  border: 1px solid rgba(62, 136, 179, 0.18);
  text-align: center;
}

.loop__item span {
  display: block;
  font-size: 11px;
  font-weight: 800;
  color: var(--brand);
  margin-bottom: 4px;
}

.loop__item strong {
  display: block;
  font-size: 13px;
  font-weight: 800;
  line-height: 1.3;
}

.method-quote {
  margin: 0;
  padding: 18px 22px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--border);
  font-size: 16px;
  font-weight: 700;
  text-align: center;
}

.method-quote em {
  font-style: normal;
  color: var(--brand);
}

/* ---------- Cases ---------- */
.case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.case-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.case-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.case-card--wide {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
}

.case-card__media {
  position: relative;
  aspect-ratio: 16 / 10;
  background: var(--surface);
  overflow: hidden;
}

.case-card--wide .case-card__media {
  aspect-ratio: auto;
  min-height: 280px;
}

.case-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.case-card__media--screenshot img {
  object-position: top left;
}

.case-card__media--stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  padding: 20px;
  background:
    radial-gradient(circle at 20% 20%, rgba(127, 182, 217, 0.42), transparent 50%),
    linear-gradient(145deg, #0D2753, #153D72);
}

.stat-tile {
  padding: 16px 14px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #fff;
}

.stat-tile strong {
  display: block;
  font-size: 28px;
  font-weight: 900;
  color: var(--glow);
  line-height: 1.1;
}

.stat-tile span {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  opacity: 0.85;
}

.case-card__body {
  padding: 22px 22px 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.case-card__tag {
  display: inline-flex;
  align-self: flex-start;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--mint);
  color: var(--brand);
  font-size: 12px;
  font-weight: 800;
  margin-bottom: 10px;
}

.case-card h3 {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 800;
}

.case-card p {
  margin: 0 0 14px;
  font-size: 14px;
  color: var(--muted);
  flex: 1;
}

.case-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.case-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: auto;
}

.case-card__link {
  font-size: 14px;
  font-weight: 800;
  color: var(--brand);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.case-card__link:hover {
  color: var(--brand-hover);
}

.case-card__muted {
  font-size: 13px;
  color: var(--muted);
  font-weight: 600;
}

/* ---------- Dual delivery ---------- */
.dual {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 20px;
  align-items: stretch;
}

.dual__card {
  padding: 28px 24px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.dual__card h3 {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 800;
}

.dual__card > p {
  margin: 0 0 18px;
  font-size: 14px;
  color: var(--muted);
}

.dual__list {
  display: grid;
  gap: 10px;
}

.dual__list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 700;
}

.dual__list li::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--brand);
  flex-shrink: 0;
}

.dual__hub {
  width: 160px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 20px 14px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--mint), #fff);
  border: 1px solid rgba(62, 136, 179, 0.24);
  text-align: center;
}

.dual__hub strong {
  font-size: 14px;
  font-weight: 900;
}

.dual__hub span {
  display: block;
  font-size: 12px;
  font-weight: 700;
  color: var(--brand);
  padding: 6px 10px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--border);
}

.dual-quote {
  margin: 28px 0 0;
  text-align: center;
  font-size: 16px;
  font-weight: 700;
  color: var(--muted);
}

.dual-quote em {
  font-style: normal;
  color: var(--ink);
}

/* ---------- Contact ---------- */
.contact {
  background:
    radial-gradient(ellipse 60% 80% at 100% 0%, rgba(127, 182, 217, 0.2), transparent 50%),
    var(--ink);
  color: #fff;
}

.contact .section__eyebrow {
  color: var(--glow);
}

.contact .section__eyebrow::before {
  background: var(--glow);
}

.contact .section__title {
  color: #fff;
}

.contact .section__lead {
  color: rgba(255, 255, 255, 0.72);
}

.contact__highlight {
  color: var(--glow);
  font-weight: 800;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 28px;
  margin-top: 36px;
}

.contact-entries {
  display: grid;
  gap: 12px;
  margin-bottom: 24px;
}

.contact-entry {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  transition: background 0.15s ease, border-color 0.15s ease;
}

.contact-entry:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(127, 182, 217, 0.46);
}

.contact-entry h3 {
  margin: 0 0 4px;
  font-size: 16px;
  font-weight: 800;
}

.contact-entry p {
  margin: 0;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.78);
}

.contact-card {
  padding: 28px 24px;
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  box-shadow: var(--shadow-lg);
}

.contact-card h3 {
  margin: 0 0 16px;
  font-size: 18px;
  font-weight: 900;
}

.contact-list {
  display: grid;
  gap: 12px;
  margin-bottom: 20px;
}

.contact-list li {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 8px;
  font-size: 14px;
}

.contact-list dt,
.contact-list .label {
  font-weight: 700;
  color: var(--muted);
  font-size: 13px;
}

.contact-list a {
  color: var(--brand);
  font-weight: 700;
}

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

.contact-qr {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.contact-qr img {
  width: 96px;
  height: 96px;
  border-radius: 12px;
  border: 1px solid var(--border);
}

.contact-qr p {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
}

.contact-qr strong {
  display: block;
  color: var(--ink);
  margin-bottom: 4px;
  font-size: 14px;
}

/* ---------- Footer ---------- */
.site-footer {
  background: #07141C;
  color: rgba(255, 255, 255, 0.7);
  padding: 36px 0 28px;
  font-size: 13px;
}

.footer__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-weight: 800;
}

.footer__brand img {
  width: 28px;
  height: 28px;
  filter: brightness(1.15);
}

.footer__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.footer__meta a:hover {
  color: var(--glow);
}

.footer__note {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.58);
}

/* ---------- Reveal: never hide content (anchor jumps must remain readable) ---------- */
.reveal {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .btn:hover,
  .service-card:hover,
  .case-card:hover {
    transform: none;
  }
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .case-card--wide,
  .contact-grid,
  .dual {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero__image {
    background:
      linear-gradient(90deg, rgba(246, 250, 253, 0.98) 0%, rgba(246, 250, 253, 0.88) 56%, rgba(246, 250, 253, 0.36) 100%),
      linear-gradient(180deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.82) 100%),
      url("/assets/home/img/hero-ai-systems.webp") center right / cover no-repeat;
  }

  .hero__proof {
    grid-template-columns: 1fr;
    max-width: 560px;
  }

  .dual__hub {
    width: 100%;
    border-radius: var(--radius);
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
  }

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

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

  .loop {
    grid-template-columns: repeat(4, 1fr);
  }

  .case-card--wide .case-card__media {
    min-height: 220px;
  }
}

@media (max-width: 720px) {
  :root {
    --nav-h: 64px;
  }

  .nav__toggle {
    display: inline-flex;
  }

  .nav__links {
    position: fixed;
    inset: var(--nav-h) 0 auto 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 16px 20px 20px;
    background: #fff;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
  }

  .site-header.is-open .nav__links {
    display: flex;
  }

  .nav__links a {
    padding: 12px 10px;
  }

  .nav__cta {
    margin: 8px 0 0;
    width: 100%;
  }

  .hero {
    padding: 40px 0 56px;
  }

  .hero__image {
    opacity: 0.5;
  }

  .hero__actions .btn {
    width: 100%;
  }

  .problem-grid,
  .case-grid,
  .method-steps,
  .loop {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 64px 0;
  }

  .contact-entry {
    flex-direction: column;
    align-items: flex-start;
  }
}