:root {
  --ink: #0f1f2b;
  --ink-soft: #3d5263;
  --muted: #6a7e8c;
  --line: #dde6e9;
  --bg: #ffffff;
  --bg-soft: #f3f8f6;
  --navy: #0b2534;
  --navy-2: #12384c;
  --green: #17a673;
  --green-dark: #0f7f57;
  --lime: #b8e986;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(11, 37, 52, 0.08);
  --max: 1160px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial,
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--green-dark);
}

h1,
h2,
h3 {
  line-height: 1.25;
  margin: 0 0 0.6em;
}

p {
  margin: 0 0 1em;
}

.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px;
}

.skip-link {
  position: absolute;
  left: -9999px;
}

.skip-link:focus {
  left: 16px;
  top: 16px;
  z-index: 100;
  background: #fff;
  padding: 8px 12px;
  border-radius: 8px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
}

.brand img {
  width: 36px;
  height: 36px;
}

.brand-name {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}

.brand-name small {
  display: block;
  font-weight: 500;
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

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

.nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 8px 12px;
  border-radius: 8px;
}

.nav a:hover {
  color: var(--ink);
  background: var(--bg-soft);
}

.langs {
  display: flex;
  margin-left: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.nav .langs a {
  border-radius: 0;
  padding: 7px 11px;
  font-size: 0.85rem;
  font-weight: 600;
}

.nav .langs a + a {
  border-left: 1px solid var(--line);
}

.nav .langs a[aria-current="page"] {
  background: var(--navy);
  color: #fff;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  width: 42px;
  height: 42px;
  cursor: pointer;
  color: var(--ink);
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  margin: 0 auto;
  position: relative;
  content: "";
}

.nav-toggle span::before {
  position: absolute;
  top: -6px;
}

.nav-toggle span::after {
  position: absolute;
  top: 6px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.15s ease, background 0.15s ease;
}

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

.btn-primary {
  background: var(--green);
  color: #fff;
}

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

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

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.08);
}

/* Hero */
.hero {
  background: radial-gradient(1200px 500px at 85% 10%, rgba(23, 166, 115, 0.28), transparent 60%),
    linear-gradient(160deg, var(--navy) 0%, var(--navy-2) 100%);
  color: #e8f1f4;
  padding: 88px 0 96px;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--lime);
  margin-bottom: 16px;
}

.hero h1 {
  font-size: clamp(2rem, 4.4vw, 3.3rem);
  color: #fff;
  letter-spacing: -0.01em;
}

.hero .lead {
  font-size: 1.15rem;
  color: #c3d4dc;
  max-width: 36em;
  margin-bottom: 28px;
}

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

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 32px;
  padding: 0;
  list-style: none;
}

.hero-tags li {
  font-size: 0.85rem;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: #d6e4ea;
}

.cycle {
  width: 100%;
  max-width: 420px;
  margin: 0 auto;
}

.cycle text {
  font-family: var(--font);
}

/* Sections */
.section {
  padding: 88px 0;
}

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

.section-head {
  max-width: 720px;
  margin-bottom: 44px;
}

.section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
}

.section-head p {
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.kicker {
  display: block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green-dark);
  margin-bottom: 10px;
}

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

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

.card h3 {
  font-size: 1.15rem;
}

.card p {
  color: var(--ink-soft);
  margin-bottom: 14px;
}

.card ul {
  margin: 0;
  padding-left: 1.1em;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.card li + li {
  margin-top: 4px;
}

.icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(23, 166, 115, 0.12);
  color: var(--green-dark);
  display: grid;
  place-items: center;
  margin-bottom: 18px;
}

.icon svg {
  width: 26px;
  height: 26px;
}

.card-highlight {
  background: linear-gradient(160deg, var(--navy) 0%, var(--navy-2) 100%);
  color: #e8f1f4;
  border-color: transparent;
}

.card-highlight h3 {
  color: #fff;
}

.card-highlight p,
.card-highlight ul {
  color: #c3d4dc;
}

.card-highlight .icon {
  background: rgba(184, 233, 134, 0.16);
  color: var(--lime);
}

/* Process */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  counter-reset: step;
  padding: 0;
  margin: 0;
  list-style: none;
}

.steps li {
  position: relative;
  padding: 28px 24px 24px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
}

.steps li::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--green);
  margin-bottom: 10px;
  line-height: 1;
}

.steps h3 {
  font-size: 1.05rem;
}

.steps p {
  color: var(--ink-soft);
  font-size: 0.95rem;
  margin: 0;
}

/* Audience */
.audience {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.audience .card {
  box-shadow: none;
}

/* Why */
.why {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.why-list {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.why-list li {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 12px;
}

.why-list svg {
  width: 24px;
  height: 24px;
  color: var(--green);
  margin-top: 2px;
}

.why-list strong {
  display: block;
}

.why-list span {
  color: var(--ink-soft);
}

/* Contact */
.contact {
  background: linear-gradient(160deg, var(--navy) 0%, var(--navy-2) 100%);
  color: #e8f1f4;
  border-radius: 20px;
  padding: 56px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}

.contact h2 {
  color: #fff;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
}

.contact p {
  color: #c3d4dc;
}

.contact ul {
  color: #c3d4dc;
  padding-left: 1.1em;
  margin: 0 0 1em;
}

.contact-box {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  padding: 28px;
}

.contact-box .label {
  font-size: 0.85rem;
  color: #9fb5c0;
  margin-bottom: 4px;
}

.contact-box .email {
  display: block;
  color: #fff;
  font-size: 1.25rem;
  font-weight: 700;
  word-break: break-all;
  margin-bottom: 20px;
  text-decoration: none;
}

/* Footer */
.site-footer {
  padding: 40px 0;
  color: var(--muted);
  font-size: 0.9rem;
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
}

.footer-inner a {
  color: var(--ink-soft);
}

.footer-langs {
  white-space: nowrap;
}

/* 404 */
.not-found {
  min-height: 70vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 60px 20px;
}

.not-found-logo {
  margin: 0 auto 20px;
}

.not-found .actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Responsive */
@media (max-width: 1000px) {
  .services {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-block;
  }

  .nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 8px 16px 16px;
  }

  .nav.open {
    display: flex;
  }

  .nav a {
    padding: 12px;
  }

  .langs {
    margin: 8px 0 0;
  }

  .nav .langs a {
    flex: 1;
    text-align: center;
    padding: 10px;
  }

  .hero {
    padding: 56px 0 64px;
  }

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

  .cycle {
    max-width: 320px;
  }

  .contact {
    padding: 32px 22px;
  }

  .section {
    padding: 64px 0;
  }
}

@media (max-width: 600px) {
  .container {
    padding: 0 16px;
  }

  .services,
  .steps,
  .audience {
    grid-template-columns: 1fr;
  }

  .brand-name small {
    display: none;
  }
}

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

  .btn {
    transition: none;
  }
}