/* =========================================
   Aozhong Main Applications
========================================= */

.az-mainuse-section {
  --az-mainuse-accent: #1f8fb8;
  --az-mainuse-accent-light: #38bdf8;
  --az-mainuse-dark: #101820;
  --az-mainuse-dark-soft: #22313f;
  --az-mainuse-text: #5f6b76;
  --az-mainuse-border: rgba(16, 24, 32, 0.08);

  width: 100%;
  padding: 40px 20px;
  font-family: Arial, Helvetica, sans-serif;
  box-sizing: border-box;
}

.az-mainuse-section *,
.az-mainuse-section *::before,
.az-mainuse-section *::after {
  box-sizing: border-box;
}

.az-mainuse-container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
}

/* Heading */
.az-mainuse-heading {
  max-width: 900px;
  margin-bottom: 44px;
}

.az-mainuse-eyebrow {
  display: inline-block;
  margin-bottom: 14px;
  color: var(--az-mainuse-accent);
  font-size: 13px;
  line-height: 1;
  font-weight: 800;
  letter-spacing: 2.2px;
  text-transform: uppercase;
}

.az-mainuse-heading h2 {
  margin: 0 0 16px;
  color: var(--az-mainuse-dark);
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1.08;
  font-weight: 800;
}

.az-mainuse-heading p {
  margin: 0;
  color: var(--az-mainuse-text);
  font-size: 17px;
  line-height: 1.75;
}

/* Main Layout */
.az-mainuse-layout {
  display: grid;
  grid-template-columns: 35% 65%;
  gap: 24px;
  align-items: stretch;
}

/* Left Summary */
.az-mainuse-summary {
  position: relative;
  overflow: hidden;
  padding: 38px 32px;
  border-radius: 26px;
  background:
    radial-gradient(
      circle at top right,
      rgba(56, 189, 248, 0.3),
      transparent 42%
    ),
    linear-gradient(
      145deg,
      var(--az-mainuse-dark),
      var(--az-mainuse-dark-soft)
    );
  color: #ffffff;
  box-shadow: 0 24px 60px rgba(16, 24, 32, 0.22);
}

.az-mainuse-summary::after {
  content: "";
  position: absolute;
  right: -100px;
  bottom: -120px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(56, 189, 248, 0.15),
    transparent 68%
  );
  pointer-events: none;
}

.az-mainuse-summary-badge {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 26px;
  padding: 14px 18px;
  border-radius: 18px;
  background: linear-gradient(
    135deg,
    var(--az-mainuse-accent-light),
    var(--az-mainuse-accent)
  );
  color: #ffffff;
  font-size: 18px;
  line-height: 1;
  font-weight: 900;
  box-shadow: 0 18px 38px rgba(31, 143, 184, 0.35);
}

.az-mainuse-summary h3 {
  position: relative;
  z-index: 1;
  margin: 0 0 16px;
  color: #ffffff;
  font-size: 30px;
  line-height: 1.16;
  font-weight: 800;
}

.az-mainuse-summary > p {
  position: relative;
  z-index: 1;
  margin: 0 0 26px;
  color: rgba(255, 255, 255, 0.8);
  font-size: 16px;
  line-height: 1.78;
}

.az-mainuse-summary-list {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 12px;
  margin-bottom: 26px;
}

.az-mainuse-summary-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 13px;
  align-items: center;
  padding: 12px 14px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 15px;
  background: rgba(255, 255, 255, 0.09);
}

.az-mainuse-summary-item span {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 13px;
  background: linear-gradient(
    135deg,
    var(--az-mainuse-accent-light),
    var(--az-mainuse-accent)
  );
  color: #ffffff;
  font-size: 13px;
  line-height: 1;
  font-weight: 900;
}

.az-mainuse-summary-item p {
  margin: 0;
  color: rgba(255, 255, 255, 0.88);
  font-size: 14.5px;
  line-height: 1.4;
  font-weight: 750;
}

.az-mainuse-summary-note {
  position: relative;
  z-index: 1;
  padding: 20px 22px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.07);
  color: rgba(255, 255, 255, 0.8);
  font-size: 15px;
  line-height: 1.7;
}

.az-mainuse-summary-note strong {
  color: #ffffff;
}

/* Application Grid */
.az-mainuse-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

/* Application Card */
.az-mainuse-card {
  position: relative;
  min-height: 290px;
  padding: 30px 28px 28px;
  overflow: hidden;
  border: 1px solid var(--az-mainuse-border);
  border-radius: 24px;
  background: #ffffff;
  box-shadow: 0 18px 45px rgba(16, 24, 32, 0.08);
  transition:
    transform 0.32s ease,
    border-color 0.32s ease,
    box-shadow 0.32s ease;
}

.az-mainuse-card::after {
  content: "";
  position: absolute;
  right: -75px;
  bottom: -85px;
  width: 210px;
  height: 210px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(31, 143, 184, 0.11),
    transparent 68%
  );
  pointer-events: none;
}

.az-mainuse-card:hover {
  z-index: 3;
  transform: translateY(-6px) scale(1.018);
  border-color: rgba(31, 143, 184, 0.3);
  box-shadow: 0 28px 62px rgba(16, 24, 32, 0.14);
}

/* Featured Card */
.az-mainuse-featured {
  border-color: rgba(255, 255, 255, 0.08);
  background:
    radial-gradient(
      circle at top right,
      rgba(56, 189, 248, 0.26),
      transparent 42%
    ),
    linear-gradient(
      145deg,
      var(--az-mainuse-dark),
      var(--az-mainuse-dark-soft)
    );
  box-shadow: 0 24px 60px rgba(16, 24, 32, 0.22);
}

.az-mainuse-featured:hover {
  border-color: rgba(56, 189, 248, 0.3);
  background:
    radial-gradient(
      circle at top right,
      rgba(56, 189, 248, 0.31),
      transparent 42%
    ),
    linear-gradient(
      145deg,
      var(--az-mainuse-dark),
      var(--az-mainuse-dark-soft)
    );
}

/* Card Top */
.az-mainuse-card-top {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

.az-mainuse-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  flex: 0 0 46px;
  border-radius: 15px;
  background: rgba(31, 143, 184, 0.1);
  color: var(--az-mainuse-accent);
  font-size: 13px;
  line-height: 1;
  font-weight: 900;
}

.az-mainuse-category {
  color: var(--az-mainuse-accent);
  font-size: 12px;
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: 1.25px;
  text-align: right;
  text-transform: uppercase;
}

.az-mainuse-featured .az-mainuse-number {
  background: linear-gradient(
    135deg,
    var(--az-mainuse-accent-light),
    var(--az-mainuse-accent)
  );
  color: #ffffff;
  box-shadow: 0 10px 24px rgba(31, 143, 184, 0.3);
}

.az-mainuse-featured .az-mainuse-category {
  color: rgba(255, 255, 255, 0.68);
}

/* Card Text */
.az-mainuse-card h3 {
  position: relative;
  z-index: 1;
  margin: 0 0 15px;
  color: var(--az-mainuse-dark);
  font-size: 22px;
  line-height: 1.28;
  font-weight: 800;
}

.az-mainuse-featured h3 {
  color: #ffffff;
}

/* Application List */
.az-mainuse-list {
  position: relative;
  z-index: 1;
  margin: 0;
  padding: 0;
  list-style: none;
}

.az-mainuse-list li {
  position: relative;
  padding: 11px 0 11px 24px;
  border-bottom: 1px solid rgba(16, 24, 32, 0.08);
  color: var(--az-mainuse-text);
  font-size: 15px;
  line-height: 1.48;
}

.az-mainuse-list li:last-child {
  border-bottom: none;
}

.az-mainuse-list li::before {
  content: "";
  position: absolute;
  top: 18px;
  left: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--az-mainuse-accent);
  box-shadow: 0 0 0 5px rgba(31, 143, 184, 0.1);
}

.az-mainuse-featured .az-mainuse-list li {
  border-bottom-color: rgba(255, 255, 255, 0.11);
  color: rgba(255, 255, 255, 0.8);
}

.az-mainuse-featured .az-mainuse-list li::before {
  background: var(--az-mainuse-accent-light);
  box-shadow: 0 0 0 5px rgba(56, 189, 248, 0.16);
}

/* Wide Card */
.az-mainuse-wide-card {
  grid-column: span 2;
  min-height: 225px;
}

.az-mainuse-wide-content {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(340px, 1.2fr);
  gap: 40px;
  align-items: end;
}

.az-mainuse-wide-content p {
  margin: 0;
  color: var(--az-mainuse-text);
  font-size: 15.5px;
  line-height: 1.75;
}

.az-mainuse-tags {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.az-mainuse-tags span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 13px;
  border: 1px solid rgba(31, 143, 184, 0.17);
  border-radius: 999px;
  background: rgba(31, 143, 184, 0.07);
  color: #315366;
  font-size: 13px;
  line-height: 1.3;
  font-weight: 750;
  transition:
    transform 0.25s ease,
    border-color 0.25s ease,
    background 0.25s ease;
}

.az-mainuse-card:hover .az-mainuse-tags span {
  transform: translateY(-2px);
  border-color: rgba(31, 143, 184, 0.28);
  background: rgba(31, 143, 184, 0.11);
}

/* Bottom Note */
.az-mainuse-bottom {
  margin-top: 24px;
  padding: 30px 32px;
  border: 1px solid rgba(31, 143, 184, 0.16);
  border-radius: 24px;
  background: linear-gradient(135deg, #f3fbff, #ffffff);
  box-shadow: 0 18px 45px rgba(16, 24, 32, 0.06);
}

.az-mainuse-bottom-title {
  margin-bottom: 22px;
}

.az-mainuse-bottom-title span {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--az-mainuse-accent);
  font-size: 12px;
  line-height: 1;
  font-weight: 800;
  letter-spacing: 1.4px;
  text-transform: uppercase;
}

.az-mainuse-bottom-title h3 {
  margin: 0;
  color: var(--az-mainuse-dark);
  font-size: 26px;
  line-height: 1.3;
  font-weight: 800;
}

.az-mainuse-bottom-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.az-mainuse-bottom-item {
  padding: 18px 17px;
  border: 1px solid var(--az-mainuse-border);
  border-radius: 17px;
  background: #ffffff;
  box-shadow: 0 10px 24px rgba(16, 24, 32, 0.04);
  transition:
    transform 0.28s ease,
    border-color 0.28s ease,
    background 0.28s ease;
}

.az-mainuse-bottom-item:hover {
  transform: translateY(-4px);
  border-color: rgba(31, 143, 184, 0.26);
  background: rgba(31, 143, 184, 0.05);
}

.az-mainuse-bottom-item strong {
  display: block;
  margin-bottom: 8px;
  color: var(--az-mainuse-dark);
  font-size: 15px;
  line-height: 1.3;
  font-weight: 800;
}

.az-mainuse-bottom-item p {
  margin: 0;
  color: var(--az-mainuse-text);
  font-size: 14px;
  line-height: 1.6;
}

/* Entrance Animation */
.az-mainuse-summary,
.az-mainuse-card,
.az-mainuse-bottom {
  opacity: 0;
  transform: translateY(22px);
  animation: azMainUseFadeUp 0.7s ease forwards;
}

.az-mainuse-summary {
  animation-delay: 0.04s;
}

.az-mainuse-card:nth-child(1) {
  animation-delay: 0.1s;
}

.az-mainuse-card:nth-child(2) {
  animation-delay: 0.17s;
}

.az-mainuse-card:nth-child(3) {
  animation-delay: 0.24s;
}

.az-mainuse-card:nth-child(4) {
  animation-delay: 0.31s;
}

.az-mainuse-card:nth-child(5) {
  animation-delay: 0.38s;
}

.az-mainuse-bottom {
  animation-delay: 0.46s;
}

@keyframes azMainUseFadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Tablet */
@media (max-width: 1024px) {
  .az-mainuse-layout {
    grid-template-columns: 1fr;
  }

  .az-mainuse-bottom-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .az-mainuse-wide-content {
    grid-template-columns: 1fr;
    gap: 14px;
    align-items: start;
  }
}

/* Mobile */
@media (max-width: 680px) {
  .az-mainuse-section {
    padding: 40px 16px;
  }

  .az-mainuse-heading {
    margin-bottom: 30px;
  }

  .az-mainuse-heading p {
    font-size: 15.5px;
  }

  .az-mainuse-grid,
  .az-mainuse-bottom-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .az-mainuse-wide-card {
    grid-column: span 1;
  }

  .az-mainuse-summary,
  .az-mainuse-card,
  .az-mainuse-bottom {
    padding: 27px 22px;
    border-radius: 20px;
  }

  .az-mainuse-summary h3 {
    font-size: 26px;
  }

  .az-mainuse-card {
    min-height: auto;
  }

  .az-mainuse-card h3 {
    font-size: 20px;
  }

  .az-mainuse-card:hover {
    transform: translateY(-4px) scale(1.01);
  }

  .az-mainuse-bottom-title h3 {
    font-size: 22px;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .az-mainuse-summary,
  .az-mainuse-card,
  .az-mainuse-bottom,
  .az-mainuse-tags span,
  .az-mainuse-bottom-item {
    animation: none;
    opacity: 1;
    transform: none;
    transition: none;
  }
}