/* Design tokens & global base */
:root {
  --color-primary: #ff6e66;
  --color-primary-text: #ff453a;
  --color-blue: #1b66f2;
  --color-green: #24ba8a;
  --color-purple: #894df8;
  --color-text-1: #3e444f;
  --color-text-2: #666666;
  --color-text-3: #848799;
  --color-text-4: #787a83;
  --color-border: #eeeeee;
  --color-footer-bg: #575763;
  --color-white: #ffffff;
  --color-bg-light: #f6f9ff;
  --color-banner-bg: #dee3ff;
  --container-width: 1280px;
  --header-height: 64px;
  --font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-family);
  color: var(--color-text-1);
  background: var(--color-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 8px;
  font-size: 18px;
  line-height: 24px;
  font-weight: 400;
  cursor: pointer;
  transition: opacity 0.2s;
  white-space: nowrap;
}

.btn:hover { opacity: 0.88; }

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  padding: 12px 32px;
}

.btn-primary--sm {
  padding: 4px 16px;
  font-size: 14px;
  line-height: 22px;
  border-radius: 6px;
}

.btn-outline {
  background: var(--color-white);
  color: rgba(0, 0, 0, 0.88);
  border: 1px solid rgba(0, 0, 0, 0.15);
  padding: 12px 32px;
}

.btn-outline:hover{
  background: var(--color-primary);
  color: var(--color-white);
  border: 1px solid var(--color-primary);
}

.btn-cta {
  min-width: 200px;
  height: 48px;
  padding: 0 40px;
  font-size: 18px;
  box-shadow: 0 8px 16px rgba(255, 105, 74, 0.5);
}

/* Module section title */
.mod-title {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.45;
  text-align: center;
  color: var(--color-text-1);
}

.mod-desc {
  margin-top: 16px;
  font-size: 24px;
  line-height: 1.45;
  text-align: center;
  color: var(--color-text-2);
}

/* Responsive base */
@media (max-width: 1279px) {
  .mod-title { font-size: 28px; }
  .mod-desc { font-size: 18px; }
}

@media (max-width: 767px) {
  .mod-title { font-size: 24px; }
  .mod-desc { font-size: 16px; }
}