/* =========================================================
   V1.4.4 电源计算器
   精简显示：电池组容量只显示 mAh；使用/充电时间只显示分钟
   ========================================================= */

.power-calculator-section {
  padding: 54px 0;
  background: #050812;
}

.calc-notice {
  padding: 16px 18px;
  margin-bottom: 24px;
  border-radius: 18px;
  color: rgba(236,243,255,.82);
  background:
    linear-gradient(135deg, rgba(46,232,255,.08), rgba(255,255,255,.025)),
    rgba(255,255,255,.045);
  border: 1px solid rgba(46,232,255,.18);
  line-height: 1.75;
}

.calc-notice strong {
  color: #2ee8ff;
}

.calc-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 22px;
}

.calc-card {
  padding: 24px;
  border-radius: 26px;
  background:
    radial-gradient(circle at 100% 0%, rgba(46,232,255,.08), transparent 32%),
    linear-gradient(135deg, rgba(46,232,255,.045), rgba(255,255,255,.025)),
    rgba(255,255,255,.045);
  border: 1px solid rgba(255,255,255,.10);
  box-shadow: 0 24px 80px rgba(0,0,0,.24);
}

.calc-card-head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 18px;
}

.calc-card-head > span {
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  color: #031018;
  background: #2ee8ff;
  font-weight: 950;
  box-shadow: 0 0 28px rgba(46,232,255,.22);
}

.calc-card-head h2 {
  margin: 0 0 8px;
  color: #fff;
  font-size: 24px;
  line-height: 1.25;
}

.calc-card-head p {
  margin: 0;
  color: rgba(236,243,255,.70);
  font-size: 14px;
  line-height: 1.7;
}

.calc-form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 14px;
}

.calc-form-grid label {
  display: block;
  color: #fff;
  font-weight: 900;
  font-size: 14px;
}

.calc-form-grid input {
  width: 100%;
  margin-top: 8px;
  padding: 13px 14px;
  border-radius: 14px;
  color: #eaf3ff;
  background: rgba(255,255,255,.055);
  border: 1px solid rgba(255,255,255,.12);
  outline: none;
}

.calc-form-grid input:focus {
  border-color: rgba(46,232,255,.45);
  box-shadow: 0 0 0 3px rgba(46,232,255,.08);
}

.calc-result-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 10px;
  margin-top: 18px;
}

.calc-result-grid.one {
  grid-template-columns: 1fr;
}

.calc-result-grid.two {
  grid-template-columns: repeat(2, minmax(0,1fr));
}

.calc-result-grid.three {
  grid-template-columns: repeat(3, minmax(0,1fr));
}

.calc-result-grid div {
  padding: 15px 10px;
  border-radius: 16px;
  text-align: center;
  background: rgba(255,255,255,.045);
  border: 1px solid rgba(255,255,255,.09);
}

.calc-result-grid strong {
  display: block;
  color: #2ee8ff;
  font-size: 24px;
  line-height: 1.2;
  word-break: normal;
  overflow-wrap: anywhere;
}

.calc-result-grid.one strong {
  font-size: 30px;
}

.calc-result-grid span {
  display: block;
  margin-top: 6px;
  color: rgba(236,243,255,.62);
  font-size: 12px;
  line-height: 1.35;
}

.calc-formula {
  margin-top: 16px;
  padding: 13px 15px;
  border-radius: 16px;
  color: rgba(236,243,255,.72);
  background: rgba(46,232,255,.055);
  border: 1px solid rgba(46,232,255,.12);
  line-height: 1.75;
  font-size: 14px;
}

.calc-knowledge {
  margin-top: 34px;
}

.calc-knowledge h2 {
  margin: 0 0 18px;
  color: #fff;
  font-size: 34px;
}

.calc-knowledge .feature-card h3 {
  color: #fff;
  margin-top: 0;
}

.calc-knowledge .feature-card p {
  color: rgba(236,243,255,.76);
  line-height: 1.8;
}

@media(max-width: 1100px) {
  .calc-grid {
    grid-template-columns: 1fr;
  }
}

@media(max-width: 720px) {
  .power-calculator-section {
    padding: 38px 0;
  }

  .calc-card {
    padding: 20px;
  }

  .calc-card-head h2 {
    font-size: 21px;
  }

  .calc-form-grid,
  .calc-result-grid,
  .calc-result-grid.one,
  .calc-result-grid.two,
  .calc-result-grid.three {
    grid-template-columns: 1fr;
  }

  .calc-result-grid strong,
  .calc-result-grid.one strong {
    font-size: 24px;
  }
}