:root {
  --dolphin-primary: #09090b;
  --dolphin-secondary: #2563eb;
  --dolphin-bg: #fafafa;
  --dolphin-surface: #ffffff;
  --dolphin-text: #111111;
  --dolphin-muted: #52525b;
  --on-primary: var(--on-primary, #ffffff);
  --dolphin-border: rgba(9, 9, 11, 0.12);
  --dolphin-border-strong: rgba(9, 9, 11, 0.22);
  --dolphin-radius-sm: 14px;
  --dolphin-radius-md: 20px;
  --dolphin-radius-lg: 28px;
  --dolphin-container: 1180px;
  --dolphin-gap: clamp(16px, 2.4vw, 28px);
}

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

html {
  color-scheme: light;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--dolphin-text);
  background: var(--dolphin-bg);
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
}

a {
  color: inherit;
}

.dolphin-app {
  min-height: 100vh;
}

.dolphin-container {
  width: min(100% - 32px, var(--dolphin-container));
  margin: 0 auto;
}

.dolphin-skip-link {
  position: absolute;
  left: -999px;
  top: 16px;
  z-index: 999;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--dolphin-primary);
  color: var(--on-primary);
  text-decoration: none;
}

.dolphin-skip-link:focus {
  left: 16px;
}

.dolphin-header {
  border-bottom: 1px solid var(--dolphin-border);
  background: var(--dolphin-bg);
}

.dolphin-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 84px;
}

.dolphin-brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
}

.dolphin-brand__logo {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  object-fit: contain;
  border: 1px solid var(--dolphin-border);
  background: var(--dolphin-surface);
}

.dolphin-brand__copy {
  display: grid;
  gap: 2px;
}

.dolphin-brand__copy strong {
  font-size: 1rem;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.dolphin-brand__copy small {
  color: var(--dolphin-muted);
  font-size: 0.84rem;
}

.dolphin-nav {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.dolphin-nav a {
  padding: 10px 12px;
  border-radius: 999px;
  text-decoration: none;
  color: var(--dolphin-muted);
  transition: color 160ms ease, background-color 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.dolphin-nav a:hover,
.dolphin-nav a:focus-visible,
.dolphin-nav a.is-active {
  color: var(--dolphin-text);
  background: rgba(9, 9, 11, 0.04);
}

.dolphin-nav__cta {
  border: 1px solid var(--dolphin-secondary);
  background: var(--dolphin-secondary);
  color: var(--on-primary) !important;
}

.dolphin-main {
  padding-bottom: 72px;
}

.dolphin-hero,
.dolphin-download-hero,
.dolphin-archive-hero {
  padding: clamp(34px, 5vw, 72px) 0 18px;
}

.dolphin-hero__grid,
.dolphin-download-hero__grid,
.dolphin-archive-hero__inner,
.dolphin-proof,
.dolphin-article__grid {
  display: grid;
  gap: clamp(24px, 4vw, 42px);
}

.dolphin-hero__grid {
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  align-items: center;
}

.dolphin-download-hero__grid {
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  align-items: center;
}

.dolphin-archive-hero__inner {
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.64fr);
  align-items: end;
}

.dolphin-kicker,
.dolphin-section__eyebrow {
  margin: 0;
  color: var(--dolphin-secondary);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.dolphin-hero h1,
.dolphin-download-hero h1,
.dolphin-archive-hero h1,
.dolphin-section__heading h2,
.dolphin-proof h2,
.dolphin-cta-panel h2,
.dolphin-article__title {
  margin: 0;
  letter-spacing: -0.05em;
  line-height: 0.98;
}

.dolphin-hero h1,
.dolphin-download-hero h1,
.dolphin-archive-hero h1 {
  max-width: 12ch;
  font-size: clamp(2.8rem, 6vw, 5.15rem);
}

.dolphin-section__heading h2,
.dolphin-proof h2,
.dolphin-cta-panel h2 {
  font-size: clamp(1.8rem, 3vw, 2.75rem);
}

.dolphin-hero__lead,
.dolphin-section__heading p,
.dolphin-proof p,
.dolphin-archive-hero p,
.dolphin-download-hero p,
.dolphin-cta-panel p,
.dolphin-article__header p,
.dolphin-summary-card p,
.dolphin-empty-state p,
.dolphin-resource-card p {
  color: var(--dolphin-muted);
}

.dolphin-hero__lead,
.dolphin-download-hero .dolphin-hero__lead,
.dolphin-archive-hero .dolphin-hero__lead {
  max-width: 60ch;
  margin: 16px 0 0;
  font-size: clamp(1rem, 1.45vw, 1.15rem);
}

.dolphin-hero__actions,
.dolphin-download__footer {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.dolphin-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 650;
  transition: transform 160ms ease, border-color 160ms ease, background-color 160ms ease, color 160ms ease;
}

.dolphin-button:hover,
.dolphin-button:focus-visible {
  transform: translateY(-1px);
}

.dolphin-button--primary {
  background: var(--dolphin-secondary);
  border-color: var(--dolphin-secondary);
  color: var(--on-primary);
}

.dolphin-button--secondary {
  background: var(--dolphin-surface);
  border-color: var(--dolphin-border);
  color: var(--dolphin-text);
}

.dolphin-hero__facts,
.dolphin-step-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0;
  margin: 24px 0 0;
  list-style: none;
}

.dolphin-hero__facts li {
  padding: 7px 12px;
  border: 1px solid var(--dolphin-border);
  border-radius: 999px;
  background: var(--dolphin-surface);
  color: var(--dolphin-muted);
  font-size: 0.84rem;
}

.dolphin-visual-card,
.dolphin-mini-card,
.dolphin-card,
.dolphin-resource-card__link,
.dolphin-archive-hero__panel,
.dolphin-summary-card,
.dolphin-cta-panel,
.dolphin-proof__panel {
  border: 1px solid var(--dolphin-border);
  border-radius: var(--dolphin-radius-lg);
  background: var(--dolphin-surface);
}

.dolphin-visual-card {
  margin: 0;
  padding: 16px;
}

.dolphin-visual-card--compact {
  padding: 14px;
}

.dolphin-visual-card img {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: calc(var(--dolphin-radius-lg) - 8px);
  background: #dbeafe;
}

.dolphin-visual-card figcaption {
  margin-top: 12px;
  color: var(--dolphin-muted);
  font-size: 0.92rem;
}

.dolphin-visual-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.dolphin-mini-card {
  padding: 16px 18px;
}

.dolphin-mini-card strong,
.dolphin-summary-card strong,
.dolphin-proof__steps strong,
.dolphin-archive-hero__panel strong {
  display: block;
  margin-bottom: 6px;
  font-size: 1rem;
  letter-spacing: -0.02em;
}

.dolphin-mini-card span,
.dolphin-summary-card p,
.dolphin-proof__panel p,
.dolphin-archive-hero__panel span,
.dolphin-step-list span {
  color: var(--dolphin-muted);
  font-size: 0.92rem;
}

.dolphin-section {
  padding: clamp(36px, 6vw, 84px) 0;
}

.dolphin-section + .dolphin-section {
  border-top: 1px solid var(--dolphin-border);
}

.dolphin-section__heading {
  display: grid;
  gap: 10px;
  max-width: 760px;
  margin-bottom: 28px;
}

.dolphin-card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.dolphin-card {
  padding: 20px;
}

.dolphin-card h3,
.dolphin-resource-card h3 {
  margin: 0;
  font-size: 1.08rem;
  letter-spacing: -0.03em;
}

.dolphin-card p {
  margin: 10px 0 0;
}

.dolphin-feature-card {
  min-height: 180px;
}

.dolphin-proof {
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
  align-items: center;
}

.dolphin-proof__copy {
  display: grid;
  gap: 14px;
}

.dolphin-proof__steps {
  display: grid;
  gap: 12px;
  margin-top: 10px;
}

.dolphin-proof__steps div {
  padding: 14px 16px;
  border: 1px solid var(--dolphin-border);
  border-radius: var(--dolphin-radius-md);
  background: rgba(255, 255, 255, 0.7);
}

.dolphin-proof__steps strong {
  margin-bottom: 4px;
}

.dolphin-proof__panel {
  padding: 16px;
}

.dolphin-proof__panel img {
  display: block;
  width: 100%;
  border-radius: calc(var(--dolphin-radius-lg) - 8px);
  background: var(--dolphin-bg);
}

.dolphin-proof__panel p {
  margin: 12px 4px 2px;
}

.dolphin-resource-card__link {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  text-decoration: none;
  transition: border-color 160ms ease, transform 160ms ease;
}

.dolphin-resource-card__link:hover,
.dolphin-resource-card__link:focus-visible {
  border-color: var(--dolphin-border-strong);
  transform: translateY(-2px);
}

.dolphin-resource-card__media {
  aspect-ratio: 16 / 9;
  border-bottom: 1px solid var(--dolphin-border);
}

.dolphin-resource-card__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.dolphin-resource-card__body {
  display: grid;
  gap: 10px;
  padding: 18px;
}

.dolphin-resource-card__meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--dolphin-muted);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.dolphin-resource-card p {
  margin: 0;
}

.dolphin-resource-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.dolphin-resource-card__tags span {
  padding: 5px 10px;
  border: 1px solid var(--dolphin-border);
  border-radius: 999px;
  color: var(--dolphin-muted);
  font-size: 0.78rem;
}

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

.dolphin-cta-panel {
  display: flex;
  justify-content: space-between;
  gap: 22px;
  align-items: center;
  padding: clamp(22px, 4vw, 34px);
}

.dolphin-cta-panel p {
  max-width: 56ch;
}

.dolphin-download-hero__visual {
  display: grid;
  gap: 16px;
}

.dolphin-download-hero__grid {
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  align-items: center;
}

.dolphin-archive-hero__panel {
  display: grid;
  gap: 10px;
  padding: 20px;
}

.dolphin-step-layout {
  display: grid;
  gap: 24px;
}

.dolphin-step-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 0;
}

.dolphin-step-list li {
  display: grid;
  gap: 6px;
  padding: 18px;
  border: 1px solid var(--dolphin-border);
  border-radius: var(--dolphin-radius-lg);
  background: var(--dolphin-surface);
  list-style: none;
}

.dolphin-download__footer {
  margin-top: 8px;
}

.dolphin-article {
  padding-top: clamp(26px, 4vw, 56px);
}

.dolphin-article__grid {
  grid-template-columns: minmax(0, 1.48fr) minmax(280px, 0.72fr);
  align-items: start;
}

.dolphin-article__header {
  display: grid;
  gap: 14px;
  margin-bottom: 20px;
}

.dolphin-article__title {
  font-size: clamp(2.2rem, 4.4vw, 4rem);
}

.dolphin-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--dolphin-muted);
  font-size: 0.9rem;
}

.dolphin-breadcrumb a {
  color: inherit;
  text-decoration: none;
}

.dolphin-breadcrumb a:hover {
  color: var(--dolphin-text);
}

.dolphin-article__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.dolphin-chip {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid var(--dolphin-border);
  border-radius: 999px;
  color: var(--dolphin-muted);
  font-size: 0.82rem;
}

.dolphin-article__figure {
  margin: 0 0 24px;
  border: 1px solid var(--dolphin-border);
  border-radius: var(--dolphin-radius-lg);
  overflow: hidden;
  background: var(--dolphin-surface);
}

.dolphin-article__figure img {
  display: block;
  width: 100%;
  height: auto;
}

.dolphin-content {
  display: grid;
  gap: 18px;
  padding-top: 24px;
  border-top: 1px solid var(--dolphin-border);
}

.dolphin-content > :first-child {
  margin-top: 0;
}

.dolphin-content :is(p, li) {
  font-size: 1rem;
}

.dolphin-content :is(h2, h3, h4) {
  margin: 14px 0 4px;
  letter-spacing: -0.03em;
}

.dolphin-content :is(ul, ol) {
  padding-left: 1.3rem;
  margin: 0;
}

.dolphin-content blockquote {
  margin: 0;
  padding: 16px 18px;
  border-left: 3px solid var(--dolphin-secondary);
  background: rgba(37, 99, 235, 0.04);
  border-radius: 0 var(--dolphin-radius-md) var(--dolphin-radius-md) 0;
}

.dolphin-content pre {
  overflow: auto;
  padding: 16px 18px;
  border: 1px solid var(--dolphin-border);
  border-radius: var(--dolphin-radius-md);
  background: #0f172a;
  color: #e2e8f0;
}

.dolphin-content code {
  padding: 0.15rem 0.35rem;
  border-radius: 8px;
  background: rgba(9, 9, 11, 0.06);
  font-size: 0.92em;
}

.dolphin-content pre code {
  padding: 0;
  background: transparent;
  color: inherit;
}

.dolphin-content table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--dolphin-border);
  border-radius: var(--dolphin-radius-md);
  overflow: hidden;
}

.dolphin-content th,
.dolphin-content td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--dolphin-border);
  text-align: left;
}

.dolphin-aside {
  position: sticky;
  top: 20px;
  display: grid;
  gap: 14px;
}

.dolphin-summary-card {
  display: grid;
  gap: 10px;
  padding: 18px;
}

.dolphin-summary-card p {
  margin: 0;
}

.dolphin-empty-state {
  padding: 28px;
  border: 1px dashed var(--dolphin-border);
  border-radius: var(--dolphin-radius-lg);
  background: rgba(255, 255, 255, 0.7);
}

.dolphin-empty-state strong {
  display: block;
  margin-bottom: 6px;
}

.dolphin-prose--intro {
  max-width: 72ch;
  margin-bottom: 20px;
  color: var(--dolphin-muted);
}

.dolphin-footer {
  border-top: 1px solid var(--dolphin-border);
  background: var(--dolphin-surface);
}

.dolphin-footer__inner {
  display: grid;
  gap: 16px;
  padding: 28px 0 34px;
}

.dolphin-footer__brand {
  display: grid;
  gap: 6px;
}

.dolphin-footer__brand p {
  margin: 0;
  color: var(--dolphin-muted);
}

.dolphin-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.dolphin-footer__links a {
  color: var(--dolphin-muted);
  text-decoration: none;
}

.dolphin-footer__links a:hover {
  color: var(--dolphin-text);
}

.dolphin-footer__note {
  color: var(--dolphin-muted);
}

@media (max-width: 1080px) {
  .dolphin-hero__grid,
  .dolphin-download-hero__grid,
  .dolphin-archive-hero__inner,
  .dolphin-proof,
  .dolphin-article__grid {
    grid-template-columns: 1fr;
  }

  .dolphin-card-grid,
  .dolphin-card-grid--resources {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .dolphin-aside {
    position: static;
  }
}

@media (max-width: 760px) {
  .dolphin-container {
    width: min(100% - 24px, var(--dolphin-container));
  }

  .dolphin-header__inner {
    min-height: auto;
    padding: 14px 0;
    align-items: flex-start;
    flex-direction: column;
  }

  .dolphin-nav {
    width: 100%;
  }

  .dolphin-nav a {
    padding-inline: 10px;
  }

  .dolphin-hero h1,
  .dolphin-download-hero h1,
  .dolphin-archive-hero h1 {
    max-width: none;
  }

  .dolphin-card-grid,
  .dolphin-card-grid--resources,
  .dolphin-visual-stats {
    grid-template-columns: 1fr;
  }

  .dolphin-cta-panel {
    flex-direction: column;
    align-items: flex-start;
  }

  .dolphin-article__title {
    font-size: clamp(2rem, 10vw, 3rem);
  }
}