.ddos-section {
  padding: 70px 0;
}

.ddos-button {
  display: inline-flex;
  min-width: 140px;
  height: 48px;
  padding: 0 28px;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 6px;
  font-size: 16px;
  line-height: 1;
  transition: transform 0.2s ease, background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.ddos-button--primary {
  color: #ffffff;
  background: #1664ff;
  box-shadow: 0 10px 24px rgba(22, 100, 255, 0.22);
}

.ddos-button--primary:hover {
  color: #fff;
  background: #0956e6;
  transform: translateY(-2px);
}

.ddos-section__title {
  margin: 0 0 42px;
  color: #1d2129;
  font-size: var(--ddos-title-size);
  line-height: 1.35;
  font-weight: 700;
  text-align: center;
}

.ddos-section--advantages {
  background: #f5f8ff;
}

.ddos-section--purchase {
  padding: 70px 0;
  background:
    radial-gradient(circle at 12% 18%, rgba(56, 148, 255, 0.1), transparent 28%),
    radial-gradient(circle at 88% 80%, rgba(102, 87, 255, 0.08), transparent 30%),
    #f5f8fd;
}

.ddos-purchase {
  display: grid;
  grid-template-columns: 390px minmax(0, 1fr);
  min-height: 520px;
  overflow: hidden;
  width: 100%;
  border: 1px solid rgba(22, 100, 255, 0.1);
  border-radius: 28px;
  background: #ffffff;
  box-shadow: 0 28px 70px rgba(28, 68, 138, 0.16);
}

.ddos-purchase__intro {
  margin: -28px 0 44px;
  color: #717883;
  font-size: 16px;
  line-height: 1.7;
  text-align: center;
}

.ddos-purchase__selector {
  position: relative;
  padding: 42px 34px 36px;
  overflow: hidden;
  color: #ffffff;
  background: linear-gradient(155deg, #0b2865 0%, #114fbd 60%, #1878eb 100%);
}

.ddos-purchase__selector::before,
.ddos-purchase__selector::after {
  position: absolute;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
  content: "";
  pointer-events: none;
}

.ddos-purchase__selector::before {
  top: -120px;
  right: -150px;
  width: 330px;
  height: 330px;
}

.ddos-purchase__selector::after {
  right: -65px;
  bottom: -115px;
  width: 230px;
  height: 230px;
}

.ddos-purchase__heading {
  position: relative;
  z-index: 1;
  display: flex;
  margin-bottom: 34px;
  align-items: center;
  gap: 15px;
}

.ddos-purchase__step {
  display: inline-flex;
  width: 52px;
  height: 52px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.34);
  border-radius: 16px;
  color: #83d7ff;
  background: rgba(255, 255, 255, 0.08);
  font-size: 18px;
  font-weight: 700;
}

.ddos-purchase__heading small,
.ddos-purchase__plan-head small {
  display: block;
  margin-bottom: 3px;
  color: rgba(255, 255, 255, 0.58);
  font-size: 10px;
  line-height: 1.2;
  letter-spacing: 2px;
}

.ddos-purchase__heading h3,
.ddos-purchase__plan-head h3 {
  margin: 0;
  font-size: 24px;
  line-height: 1.35;
}

.ddos-purchase__selector-body {
  position: relative;
  z-index: 1;
}

.ddos-purchase__region-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  padding: 5px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 14px;
  background: rgba(4, 23, 62, 0.25);
}

.ddos-purchase__tab {
  min-width: 0;
  height: 42px;
  padding: 0 12px;
  border: 0;
  border-radius: 10px;
  color: rgba(255, 255, 255, 0.7);
  background: transparent;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}

.ddos-purchase__tab:hover,
.ddos-purchase__tab.is-active {
  color: #1664ff;
  background: #ffffff;
  font-size: 16px;
  box-shadow: 0 8px 20px rgba(2, 21, 58, 0.2);
}

.ddos-purchase__nodes {
  display: none;
  margin-top: 22px;
  gap: 10px;
  flex-wrap: wrap;
}

.ddos-purchase__nodes.is-active {
  display: flex;
}

.ddos-purchase__nodes button {
  min-width: calc(33.333% - 7px);
  height: 44px;
  padding: 0 12px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  color: rgba(255, 255, 255, 0.8);
  background: rgba(255, 255, 255, 0.07);
  font-size: 14px;
  line-height: 42px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
}

.ddos-purchase__nodes button:hover,
.ddos-purchase__nodes button.is-active {
  color: #ffffff;
  border-color: #73d2ff;
  background: rgba(81, 189, 255, 0.2);
  transform: translateY(-2px);
}

.ddos-purchase__note {
  margin: 28px 0 0;
  color: rgba(255, 255, 255, 0.62);
  font-size: 13px;
}

.ddos-purchase__note span {
  display: inline-flex;
  width: 16px;
  height: 16px;
  margin-right: 7px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 50%;
  color: #8cddff;
  font-size: 11px;
  vertical-align: 1px;
}

.ddos-purchase__plan {
  display: flex;
  min-width: 0;
  padding: 44px 48px 40px;
  flex-direction: column;
  background: linear-gradient(145deg, #ffffff 0%, #f8fbff 100%);
}

.ddos-purchase__plan-head {
  display: flex;
  margin-bottom: 20px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.ddos-purchase__eyebrow {
  display: block;
  margin-bottom: 5px;
  color: #1664ff;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 2px;
}

.ddos-purchase__plan-head h3 {
  color: #1664ff;
  font-size: 28px;
}

.ddos-purchase__status {
  display: inline-flex;
  padding: 8px 12px;
  align-items: center;
  gap: 7px;
  border-radius: 20px;
  color: #16946a;
  background: #eafaf4;
  font-size: 13px;
  white-space: nowrap;
}

.ddos-purchase__status i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #20bd86;
  box-shadow: 0 0 0 4px rgba(32, 189, 134, 0.12);
}

.ddos-purchase__config-list {
  display: grid;
  gap: 0px;
}

.ddos-purchase__config {
  display: flex;
  min-height: 82px;
  padding: 18px 20px;
  align-items: center;
  gap: 18px;
  border: 1px solid #e7edf7;
  border-radius: 16px;
  background: #ffffff;
  box-shadow: 0 8px 24px rgba(42, 73, 128, 0.06);
}

.ddos-purchase__config-index {
  display: inline-flex;
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  align-items: center;
  justify-content: center;
  border-radius: 13px;
  color: #1664ff;
  background: #edf4ff;
  font-size: 13px;
  font-weight: 700;
}

.ddos-purchase__config small {
  display: block;
  margin-bottom: 5px;
  color: #8a94a6;
  font-size: 12px;
}

.ddos-purchase__config strong {
  color: #26344d;
  font-size: 17px;
  line-height: 1.4;
  font-weight: 600;
}

.ddos-purchase__action {
  display: flex;
  margin-top: 20px;
  padding: 22px 24px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border: 1px solid #dfebff;
  border-radius: 18px;
  background: #f1f6ff;
}

.ddos-purchase__action small {
  display: block;
  margin-bottom: 4px;
  color: #7d899d;
  font-size: 12px;
}

.ddos-purchase__action strong {
  color: #26344d;
  font-size: 16px;
}

.ddos-purchase__action .ddos-button {
  min-width: 132px;
  height: 44px;
  padding: 0 20px;
  gap: 12px;
  border-radius: 12px;
  font-size: 14px;
  box-shadow: 0 10px 24px rgba(22, 100, 255, 0.22);
}

.ddos-purchase__action .ddos-button span {
  font-size: 20px;
  line-height: 1;
}

.ddos-one-to-one {
  width: 100%;
  max-width: 1920px;
  margin: 0 auto;
  background: #f4f6fc;
}

.ddos-one-to-one img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1920 / 1181;
  object-fit: contain;
}

/* ==================== 响应式 ==================== */
@media (max-width: 767px) {

  .ddos-section {
    padding: 70px 0;
  }

  .ddos-section__title {
    margin-bottom: 32px;
  }

  .ddos-section--purchase {
    padding: 40px 0;
  }

  .ddos-purchase__intro {
    margin: -22px 0 32px;
    font-size: 14px;
  }

  .ddos-purchase {
    grid-template-columns: 1fr;
    border-radius: 22px;
  }

  .ddos-purchase__selector {
    padding: 30px 20px 15px;
  }

  .ddos-purchase__heading {
    margin-bottom: 15px;
  }

  .ddos-purchase__nodes button {
    min-width: calc(50% - 5px);
  }

  .ddos-purchase__plan {
    padding: 15px 20px 26px;
  }

  .ddos-purchase__plan-head {
    margin-bottom: 15px;
  }

  .ddos-purchase__plan-head h3 {
    font-size: 24px;
  }

  .ddos-purchase__status {
    padding: 7px 9px;
    font-size: 11px;
  }

  .ddos-purchase__config-list {
    gap: 0px;
  }

  .ddos-purchase__config {
    padding: 16px;
    gap: 14px;
  }

  .ddos-purchase__config strong {
    font-size: 14px;
  }

  .ddos-purchase__action {
    margin-top: 15px;
    padding: 20px;
    align-items: stretch;
    flex-direction: column;
  }

  .ddos-purchase__action .ddos-button {
    width: 100%;
  }

  .ddos-one-to-one {
    overflow-x: auto;
  }

  .ddos-one-to-one img {
    min-width: 720px;
  }
}

@media (min-width: 768px) and (max-width: 1024px) {


  .ddos-purchase {
    grid-template-columns: 320px minmax(0, 1fr);
  }

  .ddos-purchase__selector {
    padding: 36px 26px;
  }

  .ddos-purchase__plan {
    padding: 38px 30px 32px;
  }

  .ddos-purchase__nodes button {
    min-width: calc(50% - 5px);
  }

  .ddos-purchase__action {
    margin-top: 24px;
    align-items: stretch;
    flex-direction: column;
  }

  .ddos-purchase__action .ddos-button {
    width: 100%;
  }
}