:root {
  color-scheme: light;
  --ink: #0f172a;
  --ink-2: #334155;
  --muted: #64748b;
  --soft: #f8fafc;
  --paper: #ffffff;
  --line: #e2e8f0;
  --line-strong: #cbd5e1;
  --navy: #166f5f;
  --green: #10b981;
  --blue: #3b82f6;
  --coral: #f43f5e;
  --amber: #f59e0b;
  --radius: 16px;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 10px 30px -5px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 40px -10px rgba(15, 23, 42, 0.12);
  --shadow-glow: 0 0 20px rgba(16, 185, 129, 0.3);
  font-family:
    "Inter", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--soft);
  color: var(--ink);
  letter-spacing: -0.01em;
  margin: 0;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.2s ease;
}

button {
  font: inherit;
  cursor: pointer;
}

/* --- Header --- */
.site-header {
  align-items: center;
  background: rgba(248, 250, 252, 0.9);
  border-bottom: 1px solid rgba(226, 232, 240, 0.6);
  color: var(--ink);
  display: flex;
  height: 76px;
  justify-content: space-between;
  left: 0;
  padding: 0 clamp(24px, 5vw, 64px);
  position: fixed;
  right: 0;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-sm);
}

.brand {
  align-items: center;
  display: inline-flex;
  font-size: 20px;
  font-weight: 800;
  gap: 12px;
  letter-spacing: -0.02em;
}

.brand-mark {
  align-items: center;
  background: linear-gradient(135deg, var(--green), #059669);
  border-radius: 10px;
  color: var(--paper);
  display: inline-flex;
  height: 38px;
  justify-content: center;
  line-height: 1;
  width: 38px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.site-nav {
  align-items: center;
  display: flex;
  gap: 32px;
}

.site-nav a {
  color: var(--ink-2);
  font-size: 15px;
  font-weight: 600;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--green);
}

.lang-switch {
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-weight: 600;
  min-height: 38px;
  min-width: 54px;
  padding: 0 16px;
  transition: all 0.2s ease;
}

.lang-switch:hover {
  border-color: var(--green);
  background: #ecfdf5;
  color: #047857;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: transparent;
  border: none;
}

.nav-toggle span {
  background: var(--green);
  display: block;
  height: 2px;
  width: 24px;
  border-radius: 2px;
  transition: 0.2s;
}

/* --- Hero --- */
.hero {
  position: relative;
  background: var(--soft);
  border-bottom: 1px solid var(--line);
  padding: 160px clamp(24px, 5vw, 64px) 80px;
  overflow: hidden;
}

.hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  align-items: center;
  display: grid;
  gap: clamp(40px, 6vw, 80px);
  grid-template-columns: minmax(0, 1fr) minmax(460px, 0.85fr);
  margin: 0 auto;
  max-width: 1240px;
  min-height: calc(85svh - 160px);
}

.eyebrow {
  color: var(--green);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.05em;
  margin: 0 0 16px;
  text-transform: uppercase;
}

.hero h1 {
  color: var(--ink);
  font-size: clamp(48px, 6.5vw, 76px);
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin: 0;
  max-width: 820px;
  font-weight: 800;
}

.hero h1 span {
  display: block;
  background: linear-gradient(90deg, var(--green), var(--blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero h1 strong {
  color: var(--ink-2);
  display: block;
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 600;
  line-height: 1.3;
  margin-top: 24px;
  max-width: 780px;
  letter-spacing: -0.02em;
}

.hero-copy {
  color: var(--muted);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.6;
  margin: 32px 0 0;
  max-width: 720px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 40px;
}

.button {
  align-items: center;
  border: 0;
  border-radius: 999px;
  display: inline-flex;
  font-size: 16px;
  font-weight: 600;
  justify-content: center;
  min-height: 52px;
  padding: 0 28px;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.button-primary {
  background: linear-gradient(135deg, var(--green), #059669);
  color: var(--paper);
  box-shadow: 0 8px 20px -6px rgba(16, 185, 129, 0.4);
}

.button-primary:hover {
  box-shadow: 0 12px 24px -6px rgba(16, 185, 129, 0.6);
}

.button-ghost {
  background: var(--paper);
  border: 1px solid var(--line-strong);
  color: var(--ink);
  box-shadow: var(--shadow-sm);
}

.button-ghost:hover {
  border-color: var(--ink);
  background: var(--soft);
}

/* --- Enterprise Board (Hero Aside) --- */
.enterprise-board {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
  100% { transform: translateY(0px); }
}

.board-header {
  align-items: center;
  background: #eefdf7;
  color: var(--ink);
  display: flex;
  justify-content: space-between;
  padding: 24px;
}

.board-header span {
  color: var(--muted);
  display: block;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.board-header h2 {
  font-size: 22px;
  margin: 0;
  font-weight: 600;
}

.board-header strong {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.4);
  border-radius: 999px;
  color: #34d399;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
}

.board-table {
  padding: 12px 24px 8px;
}

.board-row {
  align-items: center;
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 16px;
  grid-template-columns: 0.9fr 1.3fr 0.6fr;
  min-height: 64px;
}

.board-row:last-child {
  border-bottom: none;
}

.board-row span {
  color: var(--ink-2);
  font-size: 15px;
  font-weight: 500;
}

.board-head span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.status-dot {
  align-items: center;
  display: inline-flex;
  font-weight: 600;
  gap: 8px;
  font-size: 14px;
}

.status-dot::before {
  border-radius: 50%;
  content: "";
  height: 8px;
  width: 8px;
  box-shadow: 0 0 8px currentColor;
}

.status-dot.done { color: var(--green); }
.status-dot.done::before { background: currentColor; }

.status-dot.plan { color: var(--amber); }
.status-dot.plan::before { background: currentColor; }

.hero-metrics {
  background: var(--paper);
  border-top: 1px solid var(--line);
  display: grid;
  gap: 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0;
}

.hero-metrics div {
  border-right: 1px solid var(--line);
  padding: 24px;
  text-align: center;
}

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

.hero-metrics dt {
  color: var(--ink);
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hero-metrics dd {
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.4;
  margin: 8px 0 0;
}

/* --- Sections --- */
.section {
  padding: clamp(80px, 10vw, 140px) clamp(24px, 5vw, 64px);
}

.section-inner {
  margin: 0 auto;
  max-width: 1240px;
}

.intro-band {
  background: var(--soft);
  padding-bottom: 48px;
  padding-top: 48px;
  border-bottom: 1px solid var(--line);
}

.intro-grid {
  align-items: center;
  display: grid;
  gap: 40px;
  grid-template-columns: 1.2fr 0.8fr;
}

.intro-grid p {
  color: var(--ink-2);
  font-size: 20px;
  line-height: 1.8;
  margin: 0;
  font-weight: 400;
}

.intro-tags,
.logo-cloud,
.capability-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.intro-tags span,
.logo-cloud a,
.logo-cloud span,
.capability-list span {
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink-2);
  display: inline-flex;
  font-size: 14px;
  font-weight: 600;
  min-height: 40px;
  padding: 8px 16px;
  transition: all 0.2s;
  align-items: center;
}

.logo-cloud a {
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.72), var(--shadow-sm);
  gap: 8px;
  justify-content: center;
  line-height: 1.2;
  min-width: 112px;
  text-decoration: none;
}

.logo-cloud a::before {
  background: currentColor;
  border-radius: 50%;
  content: "";
  display: inline-block;
  flex: 0 0 auto;
  height: 7px;
  opacity: 0.75;
  width: 7px;
}

.logo-cloud a:visited {
  color: inherit;
}

.intro-tags span:hover,
.logo-cloud a:hover,
.logo-cloud span:hover,
.capability-list span:hover {
  background: var(--paper);
  border-color: var(--line-strong);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.logo-cloud a:hover,
.logo-cloud a:focus-visible {
  box-shadow: var(--shadow-lg);
  outline: 0;
  text-decoration: none;
}

.search-summary {
  background: var(--soft);
  border-bottom: 1px solid var(--line);
  border-top: 1px solid var(--line);
  padding-bottom: 60px;
  padding-top: 60px;
}

.summary-layout {
  align-items: start;
  display: grid;
  gap: 48px;
  grid-template-columns: minmax(260px, 0.72fr) minmax(0, 1.28fr);
}

.summary-layout h2 {
  color: var(--ink);
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.14;
  margin: 0;
}

.summary-copy {
  border-left: 3px solid var(--green);
  padding-left: 28px;
}

.summary-copy p {
  color: var(--ink-2);
  font-size: 18px;
  line-height: 1.75;
  margin: 0;
}

.summary-copy ul {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
  margin: 20px 0 0;
  padding-left: 20px;
}

.summary-copy li + li {
  margin-top: 8px;
}

.section-heading {
  margin-bottom: 56px;
  max-width: 800px;
}

.section-heading.compact {
  max-width: 840px;
}

.section-heading h2,
.contact-layout h2 {
  color: var(--ink);
  font-size: clamp(36px, 5vw, 52px);
  line-height: 1.15;
  margin: 0;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.section-heading p:not(.eyebrow),
.contact-layout p:not(.eyebrow) {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
  margin: 20px 0 0;
}

/* --- Grids & Cards --- */
.solution-grid,
.package-grid,
.proof-grid {
  display: grid;
  gap: 24px;
}

.solution-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.solution-card,
.package-card,
.proof-grid article,
.stack-group {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
}

.solution-card:hover,
.package-card:hover,
.proof-grid article:hover,
.stack-group:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--line-strong);
}

.solution-card {
  min-height: 400px;
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
}

.solution-card .icon {
  align-items: center;
  border-radius: 12px;
  color: var(--paper);
  display: inline-flex;
  font-size: 14px;
  font-weight: 800;
  height: 48px;
  justify-content: center;
  margin-bottom: 32px;
  width: 60px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.accent-green .icon { background: linear-gradient(135deg, var(--green), #059669); }
.accent-blue .icon { background: linear-gradient(135deg, var(--blue), #2563eb); }
.accent-coral .icon { background: linear-gradient(135deg, var(--coral), #e11d48); }
.accent-amber .icon { background: linear-gradient(135deg, var(--amber), #d97706); }

.solution-card h3,
.package-card h3,
.proof-grid h3,
.stack-group h3,
.delivery-track h3 {
  color: var(--ink);
  font-size: 22px;
  line-height: 1.3;
  margin: 0;
  font-weight: 700;
}

.solution-card p,
.package-card p,
.proof-grid p,
.delivery-track p {
  color: var(--muted);
  line-height: 1.6;
  margin: 16px 0 0;
  font-size: 15px;
}

.solution-card ul,
.package-card ul {
  list-style: none;
  margin: auto 0 0;
  padding: 24px 0 0;
}

.solution-card li,
.package-card li {
  color: var(--ink-2);
  line-height: 1.5;
  margin-top: 12px;
  padding-left: 28px;
  position: relative;
  font-size: 14px;
  font-weight: 500;
}

.solution-card li::before,
.package-card li::before {
  background: var(--green);
  border-radius: 50%;
  content: "";
  height: 8px;
  left: 0;
  position: absolute;
  top: 6px;
  width: 8px;
  box-shadow: 0 0 6px rgba(16, 185, 129, 0.4);
}

/* --- Delivery & Contact --- */
.dark-section {
  background: var(--soft);
  color: var(--ink);
}

.contact-section {
  background: var(--soft);
  color: var(--ink);
}

.dark-section .section-heading h2,
.dark-section .delivery-track h3 {
  color: var(--ink);
}

.dark-section .section-heading p:not(.eyebrow),
.dark-section .delivery-track p {
  color: var(--muted);
}

.delivery-track {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.delivery-track article {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  min-height: 260px;
  padding: 32px 28px;
  transition: all 0.3s;
}

.delivery-track article:hover {
  background: var(--paper);
  transform: translateY(-4px);
}

.delivery-track span {
  color: var(--green);
  display: inline-block;
  font-size: 16px;
  font-weight: 800;
  margin-bottom: 40px;
  font-family: monospace;
}

/* --- Stack Section --- */
.stack-layout {
  align-items: start;
  display: grid;
  gap: 64px;
  grid-template-columns: minmax(320px, 0.7fr) minmax(0, 1.3fr);
}

.sticky-heading {
  position: sticky;
  top: 120px;
}

.stack-groups {
  display: grid;
  gap: 24px;
}

.stack-group {
  padding: 32px;
}

.stack-group h3 {
  margin-bottom: 24px;
}

.logo-cloud a:nth-child(3n + 1),
.logo-cloud span:nth-child(3n + 1) { background: #ecfdf5; color: #065f46; border-color: #d1fae5; }
.logo-cloud a:nth-child(3n + 2),
.logo-cloud span:nth-child(3n + 2) { background: #eff6ff; color: #1e40af; border-color: #dbeafe; }
.logo-cloud a:nth-child(3n),
.logo-cloud span:nth-child(3n) { background: #fff1f2; color: #9f1239; border-color: #ffe4e6; }

/* --- Proof Section --- */
.proof-section {
  background: var(--soft);
}

.proof-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.proof-grid article {
  min-height: 220px;
  padding: 32px;
}

/* --- Packages --- */
.package-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.package-card {
  padding: 40px 32px;
}

.package-card.featured {
  border: 2px solid var(--green);
  box-shadow: var(--shadow-lg), 0 0 0 1px var(--green);
  transform: translateY(-12px);
  position: relative;
}

.package-card.featured:hover {
  transform: translateY(-16px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.package-kicker {
  color: var(--green);
  font-size: 14px;
  font-weight: 800;
  margin: 0 0 16px !important;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- Customer Cases --- */
.case-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(3, 1fr);
}

.case-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
}

.case-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--green);
}

.case-tag {
  background: var(--soft);
  color: var(--green);
  font-size: 12px;
  font-weight: 800;
  padding: 4px 10px;
  border-radius: 6px;
  display: inline-block;
  align-self: flex-start;
  margin-bottom: 20px;
}

.case-card h3 {
  font-size: 20px;
  margin: 0 0 16px;
}

.case-card p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 24px;
  flex-grow: 1;
}

.case-result {
  border-top: 1px solid var(--line);
  padding-top: 20px;
  font-size: 14px;
  color: var(--ink-2);
}

.case-result strong {
  color: var(--green);
  margin-right: 8px;
}

/* --- Contact --- */
.contact-layout {
  align-items: center;
  display: grid;
  gap: 56px;
  grid-template-columns: minmax(0, 1fr) 400px;
}

.contact-layout h2 {
  color: var(--ink);
}

.contact-layout p:not(.eyebrow) {
  color: var(--muted);
}

.contact-panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
  backdrop-filter: blur(10px);
}

.contact-link {
  border-bottom: 1px solid var(--line);
  display: block;
  margin-bottom: 24px;
  padding-bottom: 24px;
}

.contact-link span {
  color: var(--muted);
  display: block;
  font-size: 14px;
  margin-bottom: 8px;
  font-weight: 600;
}

.contact-link strong {
  font-size: 24px;
  font-weight: 700;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.contact-panel .button {
  width: 100%;
}

.contact-status {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
  margin: 14px 0 0;
  min-height: 20px;
}

/* --- Footer --- */
.site-footer {
  background: var(--soft);
  color: var(--muted);
  padding: 32px clamp(24px, 5vw, 64px);
  border-top: 1px solid var(--line);
}

.footer-inner {
  align-items: center;
  display: flex;
  gap: 24px;
  justify-content: space-between;
  max-width: 1240px;
  margin: 0 auto;
}

.footer-inner p {
  margin: 0;
  font-size: 14px;
}

/* --- Responsive --- */
@media (max-width: 1140px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 56px;
  }

  .hero h1, .hero h1 strong, .hero-copy {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .enterprise-board {
    max-width: 800px;
    margin: 0 auto;
    animation: none;
    transform: none;
  }

  .solution-grid,
  .delivery-track,
  .case-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .stack-layout,
  .intro-grid,
  .summary-layout,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .sticky-heading {
    position: static;
  }
}

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

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    align-items: stretch;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--line);
    display: none;
    flex-direction: column;
    gap: 0;
    left: 0;
    padding: 16px 24px 24px;
    position: fixed;
    right: 0;
    top: 68px;
    box-shadow: var(--shadow-lg);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a,
  .lang-switch {
    min-height: 48px;
  }

  .site-nav a {
    align-items: center;
    display: flex;
    border-bottom: 1px solid var(--soft);
  }

  .lang-switch {
    margin-top: 16px;
    width: 100%;
    justify-content: center;
    display: flex;
    align-items: center;
  }

  .hero {
    padding-top: 120px;
  }

  .hero h1,
  .hero h1 span {
    font-size: clamp(42px, 12vw, 56px);
  }

  .board-header,
  .board-row {
    grid-template-columns: 1fr;
  }

  .board-header {
    align-items: flex-start;
    gap: 16px;
  }

  .board-row {
    align-items: start;
    padding: 16px 0;
    gap: 8px;
  }

  .hero-metrics,
  .package-grid,
  .proof-grid,
  .solution-grid,
  .delivery-track,
  .summary-layout,
  .case-grid {
    grid-template-columns: 1fr;
  }

  .summary-copy {
    padding-left: 18px;
  }

  .hero-metrics div {
    border-bottom: 1px solid var(--line);
    border-right: 0;
  }

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

  .package-card.featured {
    transform: none;
  }
  
  .package-card.featured:hover {
    transform: translateY(-4px);
  }

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    scroll-behavior: auto !important;
    transition-duration: 1ms !important;
  }
}