:root {
  --color-bg: #f3f6fb;
  --color-surface: #ffffff;
  --color-surface-soft: #edf2ff;
  --color-text: #0a1222;
  --color-text-muted: #4f5b70;
  --color-border: #d7deeb;
  --color-primary: #0b63f6;
  --color-primary-2: #09b8a5;
  --color-primary-hover: #0747b6;
  --color-danger: #c92a2a;
  --color-success: #117a50;
  --bg-gradient: radial-gradient(circle at 20% 20%, #3b7bff33 0%, transparent 50%),
    radial-gradient(circle at 80% 10%, #09b8a533 0%, transparent 42%),
    linear-gradient(145deg, #f5f8ff 0%, #eef2fb 45%, #f8fbff 100%);
  --glass-bg: #ffffffaf;
  --glass-border: #ffffffcf;
  --shadow-sm: 0 10px 25px -18px #0f213f40;
  --shadow-md: 0 22px 50px -24px #0918303d;
  --shadow-lg: 0 34px 70px -28px #09183030;
  --radius-sm: 0.625rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-xl: 2rem;
  --font-sans: "Inter", "Segoe UI", "SF Pro Text", "SF Pro Display", "Helvetica Neue", -apple-system, BlinkMacSystemFont, "Roboto", sans-serif;
  --step--1: clamp(0.75rem, 0.72rem + 0.12vw, 0.85rem);
  --step-0: clamp(0.94rem, 0.9rem + 0.2vw, 1rem);
  --step-1: clamp(1.18rem, 1.07rem + 0.35vw, 1.3rem);
  --step-2: clamp(1.43rem, 1.26rem + 0.55vw, 1.7rem);
  --step-3: clamp(1.72rem, 1.5rem + 0.95vw, 2.2rem);
  --step-4: clamp(2.2rem, 1.8rem + 1.6vw, 3.2rem);
  --step-5: clamp(2.8rem, 2.2rem + 2.5vw, 4.4rem);
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;
  --content-max: 1160px;
  --header-h: 74px;
  color-scheme: light;
}

html[data-theme="dark"] {
  --color-bg: #060d19;
  --color-surface: #101a2b;
  --color-surface-soft: #192338;
  --color-text: #e6eeff;
  --color-text-muted: #98a7c4;
  --color-border: #2a3855;
  --color-primary: #5c97ff;
  --color-primary-2: #35d6c2;
  --color-primary-hover: #8eb8ff;
  --color-danger: #ff7f7f;
  --color-success: #6fe4ae;
  --bg-gradient: radial-gradient(circle at 14% 15%, #3b7bff50 0%, transparent 42%),
    radial-gradient(circle at 80% 8%, #14d9be44 0%, transparent 30%),
    linear-gradient(145deg, #050b15 0%, #0d1628 50%, #0b1321 100%);
  --glass-bg: #121e32b8;
  --glass-border: #304262ba;
  --shadow-sm: 0 12px 25px -16px #00000066;
  --shadow-md: 0 24px 60px -26px #00000085;
  --shadow-lg: 0 34px 80px -30px #000000c2;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--bg-gradient);
  min-height: 100vh;
}

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

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

a:hover {
  text-decoration: none;
}

p {
  margin: 0;
  color: var(--color-text-muted);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: var(--step-5);
}

h2 {
  font-size: var(--step-4);
}

h3 {
  font-size: var(--step-2);
}

small {
  font-size: var(--step--1);
}

main {
  overflow: clip;
}

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

.stack > * + * {
  margin-top: var(--space-4);
}

.grid {
  display: grid;
  gap: var(--space-4);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
}

.section {
  padding: var(--space-8) 0;
}

.section-sm {
  padding: var(--space-7) 0;
}

.surface {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.glass {
  backdrop-filter: blur(14px);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
}

.badge,
.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
  font-size: var(--step--1);
  font-weight: 600;
  border: 1px solid var(--color-border);
  background: color-mix(in oklab, var(--color-surface) 70%, var(--color-primary) 8%);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.btn {
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.75rem 1.2rem;
  font-weight: 650;
  font-size: var(--step--1);
  letter-spacing: 0.01em;
  line-height: 1;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 0.4rem;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[role="button"]:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.btn-primary {
  background: linear-gradient(145deg, var(--color-primary), color-mix(in oklab, var(--color-primary), #ffffff 12%));
  color: #fff;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--color-primary-hover);
}

.btn-secondary {
  background: linear-gradient(145deg, var(--color-primary-2), color-mix(in oklab, var(--color-primary-2), #ffffff 15%));
  color: #fff;
}

.btn-ghost {
  border-color: var(--color-border);
  background: color-mix(in oklab, var(--color-surface) 88%, var(--color-primary) 5%);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-surface);
  padding: var(--space-2) var(--space-3);
  z-index: 999;
}

.skip-link:focus {
  left: var(--space-2);
  top: var(--space-2);
}

.site-announcement {
  position: sticky;
  top: 0;
  z-index: 90;
  backdrop-filter: blur(10px);
  background: color-mix(in oklab, var(--color-surface) 75%, var(--color-primary) 8%);
  border-bottom: 1px solid var(--color-border);
}

.site-announcement .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 0.5rem 0;
}

.icon-btn {
  border: 1px solid var(--color-border);
  border-radius: 999px;
  width: 2.3rem;
  height: 2.3rem;
  background: var(--color-surface);
  color: var(--color-text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  border-bottom: 1px solid color-mix(in oklab, var(--color-border) 85%, transparent);
}

.header-inner {
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 700;
}

.brand-mark {
  width: 2rem;
  height: 2rem;
  border-radius: 0.65rem;
  background: linear-gradient(145deg, var(--color-primary), var(--color-primary-2));
  box-shadow: var(--shadow-sm);
}

.brand-logo {
  width: 2rem;
  height: 2rem;
  object-fit: contain;
  border-radius: 0.5rem;
}

.site-nav {
  display: none;
}

.menu,
.submenu {
  list-style: none;
  margin: 0;
  padding: 0;
}

.menu {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.menu-item {
  position: relative;
}

.menu-link,
.menu-button {
  border: 0;
  background: none;
  font: inherit;
  color: inherit;
  padding: 0.65rem 0.75rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 550;
}

.menu-link[aria-current="page"],
.menu-link:hover,
.menu-button:hover,
.menu-button[aria-expanded="true"] {
  background: color-mix(in oklab, var(--color-surface) 75%, var(--color-primary) 10%);
}

.dropdown {
  position: absolute;
  top: calc(100% + 0.35rem);
  left: 0;
  min-width: 240px;
  padding: var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.dropdown.show {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.dropdown a {
  display: block;
  padding: 0.5rem;
  border-radius: 0.55rem;
  color: var(--color-text-muted);
}

.dropdown a:hover,
.dropdown a:focus-visible {
  background: color-mix(in oklab, var(--color-surface) 75%, var(--color-primary) 12%);
  color: var(--color-text);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 120;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.mobile-menu.show {
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu-backdrop {
  position: absolute;
  inset: 0;
  background: #00000078;
}

.mobile-menu-panel {
  position: absolute;
  top: 0;
  right: 0;
  width: min(90vw, 350px);
  height: 100%;
  padding: var(--space-4);
  background: var(--color-surface);
  border-left: 1px solid var(--color-border);
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: var(--space-4);
}

.mobile-links {
  display: grid;
  gap: 0.35rem;
}

.mobile-links a,
.mobile-links summary {
  padding: 0.7rem;
  border-radius: 0.7rem;
  cursor: pointer;
  list-style: none;
}

.mobile-links a:hover,
.mobile-links summary:hover {
  background: color-mix(in oklab, var(--color-surface) 70%, var(--color-primary) 12%);
}

.hero {
  padding-top: calc(var(--space-8) + var(--space-2));
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 12% -24% auto;
  height: 420px;
  background: radial-gradient(circle at center, #3e85ff2d 0%, transparent 65%);
  filter: blur(10px);
  pointer-events: none;
  animation: float 10s ease-in-out infinite;
}

.hero-grid {
  display: grid;
  gap: var(--space-6);
  align-items: center;
}

.hero-card {
  padding: var(--space-5);
  border-radius: var(--radius-xl);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--step--1);
  text-transform: uppercase;
  letter-spacing: 0.11em;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
  font-weight: 700;
}

.logo-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: var(--space-4);
  align-items: center;
}

.logo-item {
  aspect-ratio: 1 / 1;
  padding: var(--space-3);
  border-radius: 1.1rem;
  border: 1px solid var(--color-border);
  background:
    radial-gradient(circle at 20% 15%, color-mix(in oklab, var(--color-primary) 18%, transparent) 0%, transparent 56%),
    color-mix(in oklab, var(--color-surface) 88%, var(--color-primary) 4%);
  display: grid;
  place-items: center;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.logo-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: color-mix(in oklab, var(--color-primary) 35%, var(--color-border));
}

.logo-mark {
  width: 78%;
  height: 78%;
  object-fit: contain;
  filter: saturate(1.04);
}

.card {
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.card h3 {
  margin-bottom: 0.65rem;
}

.kpi {
  font-size: var(--step-3);
  font-weight: 700;
  color: var(--color-text);
}

.list-clean {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-2);
}

.list-clean li {
  position: relative;
  padding-left: 1.25rem;
  color: var(--color-text-muted);
}

.list-clean li::before {
  content: "";
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  position: absolute;
  left: 0;
  top: 0.58rem;
  background: linear-gradient(145deg, var(--color-primary), var(--color-primary-2));
}

.testimonial-slider {
  position: relative;
  overflow: hidden;
}

.slides {
  display: flex;
  transition: transform 0.45s ease;
}

.slide {
  min-width: 100%;
  padding: var(--space-5);
}

.slider-controls {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.faq-trigger {
  width: 100%;
  text-align: left;
  padding: var(--space-4);
  border: 0;
  background: none;
  font: inherit;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
}

.faq-panel {
  padding: 0 var(--space-4) var(--space-4);
  display: none;
}

.faq-item.open .faq-panel {
  display: block;
}

.breadcrumb {
  margin-top: var(--space-4);
}

.breadcrumb ol {
  list-style: none;
  display: flex;
  gap: 0.5rem;
  padding: 0;
  margin: 0;
  font-size: var(--step--1);
  flex-wrap: wrap;
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 0.45rem;
  color: var(--color-text-muted);
}

.table-like {
  width: 100%;
  border-collapse: collapse;
}

.table-like th,
.table-like td {
  padding: 0.8rem;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
}

.input,
textarea,
select {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  padding: 0.75rem 0.85rem;
  font: inherit;
}

label {
  display: grid;
  gap: 0.35rem;
  font-size: var(--step--1);
  font-weight: 550;
  color: var(--color-text);
}

.form-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
}

.error-msg {
  color: var(--color-danger);
  font-size: var(--step--1);
}

.input.error,
textarea.error,
select.error {
  border-color: var(--color-danger);
}

.success-box {
  margin-top: var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid color-mix(in oklab, var(--color-success) 50%, var(--color-border));
  background: color-mix(in oklab, var(--color-success) 15%, var(--color-surface));
  color: var(--color-text);
  padding: var(--space-3);
}

.modal {
  position: fixed;
  inset: 0;
  display: none;
  z-index: 140;
}

.modal.open {
  display: block;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: #0000007d;
}

.modal-panel {
  position: relative;
  width: min(92vw, 620px);
  margin: 8vh auto;
  max-height: 84vh;
  overflow: auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-5);
}

.toast-wrap {
  position: fixed;
  right: var(--space-4);
  bottom: var(--space-4);
  z-index: 170;
  display: grid;
  gap: var(--space-2);
}

.toast {
  padding: 0.8rem 1rem;
  border-radius: 0.8rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}

.blog-toc {
  position: sticky;
  top: calc(var(--header-h) + 1rem);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  background: var(--color-surface);
}

.blog-toc a {
  display: block;
  padding: 0.4rem;
  border-radius: 0.45rem;
  color: var(--color-text-muted);
}

.blog-toc a.active,
.blog-toc a:hover {
  color: var(--color-text);
  background: color-mix(in oklab, var(--color-surface) 72%, var(--color-primary) 11%);
}

.timeline {
  border-left: 2px solid var(--color-border);
  padding-left: var(--space-4);
  display: grid;
  gap: var(--space-4);
}

.timeline-item {
  position: relative;
}

.timeline-item::before {
  content: "";
  width: 0.8rem;
  height: 0.8rem;
  border-radius: 50%;
  background: var(--color-primary);
  position: absolute;
  left: calc(-1 * var(--space-4) - 0.5rem);
  top: 0.3rem;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

.back-to-top {
  position: fixed;
  right: var(--space-4);
  bottom: calc(var(--space-4) + 68px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  z-index: 80;
}

.back-to-top.show {
  opacity: 1;
  pointer-events: auto;
}

.site-footer {
  margin-top: var(--space-8);
  padding: var(--space-7) 0 var(--space-5);
  border-top: 1px solid var(--color-border);
  background: color-mix(in oklab, var(--color-surface) 88%, var(--color-primary) 5%);
}

.footer-grid {
  display: grid;
  gap: var(--space-5);
}

.footer-links {
  display: grid;
  gap: 0.35rem;
}

.socials {
  display: flex;
  gap: var(--space-2);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (min-width: 760px) {
  .hero-grid {
    grid-template-columns: 1.25fr 1fr;
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

@media (min-width: 980px) {
  .site-nav {
    display: block;
  }

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

  .section {
    padding: var(--space-9) 0;
  }

  .blog-layout {
    display: grid;
    gap: var(--space-6);
    grid-template-columns: 1fr 280px;
    align-items: start;
  }
}

@media (max-width: 979px) {
  .desktop-only {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-18px);
  }
}