/* ============================================================
   insight01 — 首页「洞察与观点 / Insights and Perspectives」
   v=1：深墨底 + 紫/青/青光晕，三张图文卡（案例 07 / 08 / 09 的
   配图与文案）指向 /case07 /case08 /case09。
   呼应站内深色段手法；纯 CSS，无 JS，无依赖。
   Breakpoints: 640 / 768 / 1024 / 1280
   ============================================================ */

section.insight01 {
  --in-ink: #13171e;
  --in-body: #f5f3fb;
  --in-muted: rgba(245, 243, 251, 0.7);

  padding: var(--section-y) var(--page-pad);
  background:
    radial-gradient(50% 46% at 6% 0%, rgba(134, 79, 254, 0.3), transparent 70%),
    radial-gradient(44% 42% at 96% 6%, rgba(131, 231, 238, 0.16), transparent 72%),
    radial-gradient(52% 46% at 62% 100%, rgba(198, 245, 111, 0.1), transparent 74%),
    var(--in-ink);
  color: var(--in-body);
}

.insight01 .insight01__inner {
  max-width: var(--content-max);
  margin-inline: auto;
}

/* ---------- head ---------- */

.insight01 .insight01__head {
  max-width: var(--head-max);
  margin: 0 auto var(--space-6);
  text-align: center;
}

.insight01 .insight01__kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 var(--space-3);
  padding: 0.4rem 0.875rem;
  background: rgba(134, 79, 254, 0.2);
  border: var(--line) solid rgba(131, 231, 238, 0.36);
  border-radius: var(--radius-pill);
  color: #e9fbff;
  font-size: 0.8125rem;
  line-height: 1.5;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.insight01 .insight01__kicker::before {
  content: "";
  width: 0.5rem;
  height: 0.5rem;
  border-radius: var(--radius-pill);
  background: #c6f56f;
  box-shadow: 0 0 0 0.25rem rgba(198, 245, 111, 0.16);
}

.insight01 .insight01__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 500;
  line-height: 1.2;
  color: #fff;
  text-wrap: balance;
}

.insight01 .insight01__lead {
  margin: var(--space-3) 0 0;
  color: var(--in-muted);
  line-height: var(--lh-body);
}

/* ---------- cards ---------- */

.insight01 .insight01__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  max-width: 34rem;
  margin: 0 auto;
  padding: 0;
  list-style: none;
}

.insight01 .insight01__item {
  min-width: 0;
}

.insight01 .insight01__card {
  overflow: hidden;
  height: 100%;
  background: rgba(255, 255, 255, 0.05);
  border: var(--line) solid rgba(255, 255, 255, 0.1);
  border-radius: calc(var(--radius) * 2.5);
  transition: transform var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease),
    background var(--t-fast) var(--ease);
}

.insight01 .insight01__card:hover,
.insight01 .insight01__card:focus-within {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(131, 231, 238, 0.45);
}

.insight01 .insight01__link {
  display: flex;
  flex-direction: column;
  height: 100%;
  color: inherit;
}

.insight01 .insight01__media {
  margin: 0;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  height: auto;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #1b2029;
}

.insight01 .insight01__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 420ms var(--ease);
}

.insight01 .insight01__card:hover .insight01__media img {
  transform: scale(1.03);
}

@supports not (aspect-ratio: 1 / 1) {
  .insight01 .insight01__media {
    position: relative;
  }

  .insight01 .insight01__media::before {
    content: "";
    display: block;
    padding-top: 62.5%;
  }

  .insight01 .insight01__media img {
    position: absolute;
    top: 0;
    left: 0;
  }
}

.insight01 .insight01__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1 1 auto;
  padding: var(--space-5);
}

.insight01 .insight01__tag {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(131, 231, 238, 0.92);
}

.insight01 .insight01__card-title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.35;
  color: #fff;
}

.insight01 .insight01__card-text {
  margin: 0;
  flex: 1 1 auto;
  color: var(--in-muted);
  font-size: 0.9375rem;
  line-height: var(--lh-body);
}

.insight01 .insight01__more {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: var(--space-2);
  color: #c6f56f;
  font-size: 0.9375rem;
  font-weight: 500;
}

.insight01 .insight01__more::after {
  content: "\2192";
  transition: transform var(--t-fast) var(--ease);
}

.insight01 .insight01__card:hover .insight01__more::after {
  transform: translateX(0.25rem);
}

/* ---------- footer link ---------- */

.insight01 .insight01__foot {
  margin: var(--space-6) 0 0;
  text-align: center;
}

.insight01 .insight01__foot-link {
  display: inline-flex;
  align-items: center;
  min-height: 3rem;
  padding: var(--btn-pad);
  border: var(--line) solid rgba(255, 255, 255, 0.26);
  border-radius: var(--btn-radius);
  color: var(--in-body);
  font-weight: 500;
  transition: background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.insight01 .insight01__foot-link:hover,
.insight01 .insight01__foot-link:focus-visible {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(131, 231, 238, 0.55);
}

/* ---------- 640+ ---------- */

@media (min-width: 640px) {
  .insight01 .insight01__body {
    padding: var(--space-6);
  }
}

/* ---------- 768+ ---------- */

@media (min-width: 768px) {
  .insight01 .insight01__title {
    font-size: 2.25rem;
  }

  .insight01 .insight01__grid {
    max-width: 40rem;
    gap: var(--space-5);
  }
}

/* ---------- 1024+ ---------- */

@media (min-width: 1024px) {
  section.insight01 {
    padding: 5.5rem var(--page-pad);
  }

  .insight01 .insight01__title {
    font-size: 2.5rem;
  }

  .insight01 .insight01__grid {
    max-width: none;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 1280+ ---------- */

@media (min-width: 1280px) {
  .insight01 .insight01__grid {
    gap: var(--space-6);
  }
}