/* ============================================================
   MaterialCalc 计算器子页面样式(依赖 main.css 设计令牌)
   ============================================================ */

/* ---------- 面包屑 ---------- */
.crumbs .container {
  padding-top: 14px;
}
.crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.85rem;
  color: var(--muted);
}
.crumbs li + li::before {
  content: "/";
  margin: 0 7px;
  color: var(--line-strong);
}
.crumbs a {
  color: var(--text-soft);
  font-weight: 550;
}
.crumbs a:hover {
  color: var(--brand);
}
.crumbs [aria-current="page"] {
  color: var(--text);
  font-weight: 650;
}

/* ---------- 工具页 hero ---------- */
.tool-hero {
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(55% 90% at 92% -10%, rgba(242, 169, 59, 0.15), transparent 60%),
    radial-gradient(45% 80% at -5% 10%, rgba(15, 107, 79, 0.1), transparent 60%),
    linear-gradient(180deg, #ffffff 0%, var(--bg) 100%);
}
.tool-hero-inner {
  display: grid;
  grid-template-columns: 1fr 1.08fr;
  gap: clamp(24px, 4vw, 54px);
  align-items: start;
  padding-block: clamp(30px, 5vw, 54px);
}
.tool-copy .kicker-chip {
  display: inline-block;
  background: var(--brand-soft);
  color: var(--brand-dark);
  font-weight: 650;
  font-size: 0.82rem;
  padding: 5px 13px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.tool-copy h1 {
  font-size: clamp(1.7rem, 3.8vw, 2.55rem);
  margin-bottom: 14px;
}
.tool-copy .answer {
  color: var(--text-soft);
  font-size: 1.04rem;
  margin-bottom: 0;
}
.tool-copy .tool-intro {
  color: var(--text-soft);
  font-size: 0.96rem;
  line-height: 1.8;
  margin: 16px 0 0;
}
.tool-copy .faq-heading {
  font-size: 1.16rem;
  margin: 26px 0 12px;
}
.tool-copy .faq-list {
  max-width: none;
  gap: 10px;
}
.tool-copy .faq-item summary {
  padding: 14px 16px;
  font-size: 0.98rem;
}
.tool-copy .faq-item .faq-body {
  padding: 2px 16px 16px;
}
.tool-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}
.tool-meta li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.83rem;
  font-weight: 600;
  color: var(--text-soft);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 12px;
}
.tool-meta li svg {
  width: 15px;
  height: 15px;
  stroke: var(--brand);
  flex: none;
}

/* ---------- 计算器卡片 ---------- */
.calc-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 24px;
  scroll-margin-top: 84px;
}
.calc-card .card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 14px;
  margin-bottom: 18px;
}
.calc-card .card-head h2 {
  font-size: 1.18rem;
  margin: 0;
}
.calc-card .card-head .tag {
  font-size: 0.72rem;
  font-weight: 700;
  background: var(--brand-soft);
  color: var(--brand);
  padding: 3px 9px;
  border-radius: 999px;
  white-space: nowrap;
}
.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px 16px;
}
.calc-grid .field.full {
  grid-column: 1 / -1;
}
.calc-card .input-wrap input,
.calc-card .input-wrap select {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: none;
  padding: 10px 12px;
  font: inherit;
  font-size: 1rem;
  color: var(--text);
  background: transparent;
  appearance: none;
}
.calc-card .input-wrap select {
  cursor: pointer;
  padding-right: 30px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%234c5f56' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
}
.calc-card .field-hint {
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 4px;
}
.field-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
}

/* ---------- 结果区 ---------- */
.result-shell {
  margin-top: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
  overflow: hidden;
}
.result-idle {
  padding: 18px 20px;
  font-size: 0.92rem;
  color: var(--muted);
}
.result-ok {
  display: none;
}
.result-ok.shown {
  display: block;
}
.result-top {
  padding: 16px 20px 14px;
  border-bottom: 1px dashed var(--line-strong);
}
.result-mainline {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 6px 10px;
}
.r-num {
  font-size: clamp(1.7rem, 3vw, 2.25rem);
  font-weight: 800;
  color: var(--brand-dark);
  line-height: 1;
}
.r-unit {
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--brand);
}
.r-note {
  font-size: 0.9rem;
  color: var(--text-soft);
  margin-top: 8px;
}
.r-metric {
  display: inline-block;
  margin-top: 10px;
  font-size: 0.8rem;
  font-weight: 650;
  color: var(--brand-dark);
  background: var(--brand-soft);
  border-radius: 999px;
  padding: 4px 11px;
}
.r-rows dl {
  margin: 0;
  padding: 6px 20px 12px;
}
.r-row {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding: 7px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 0.94rem;
}
.r-row:last-child {
  border-bottom: 0;
}
.r-row dt {
  color: var(--text-soft);
}
.r-row dd {
  margin: 0;
  font-weight: 650;
  text-align: right;
  white-space: nowrap;
}
.calc-error {
  display: none;
  margin-top: 12px;
  font-size: 0.88rem;
  font-weight: 600;
  color: #b3362b;
  background: #fdeeec;
  border: 1px solid #f6cbc5;
  border-radius: 10px;
  padding: 10px 14px;
}
.calc-error.shown {
  display: block;
}

/* ---------- 内容区块 ---------- */
.tool-section {
  padding-block: clamp(44px, 6vw, 72px);
}
.tool-section.alt {
  background: #fff;
  border-block: 1px solid var(--line);
}
.tool-section .kicker {
  color: var(--brand);
  font-weight: 650;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  margin-bottom: 8px;
}
.tool-section h2 {
  font-size: clamp(1.4rem, 2.8vw, 1.95rem);
  margin-bottom: 10px;
}
.tool-section .lead {
  color: var(--text-soft);
  max-width: 760px;
  font-size: 1.03rem;
}
.guide-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px 28px;
  margin-top: 26px;
}
.guide-card {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
}
.guide-card h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 9px;
}
.guide-card h3 .num {
  width: 26px;
  height: 26px;
  flex: none;
  border-radius: 8px;
  background: var(--brand);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 800;
  display: grid;
  place-items: center;
}
.guide-card p,
.guide-card li {
  font-size: 0.95rem;
  color: var(--text-soft);
}
.guide-card ul {
  margin: 8px 0 0;
  padding-left: 0;
  list-style: none;
  display: grid;
  gap: 7px;
}
.guide-card li {
  position: relative;
  padding-left: 22px;
}
.guide-card li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.52em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

/* ---------- 公式与示例 ---------- */
.formula-card {
  margin-top: 26px;
  background: var(--brand-deep);
  color: rgba(255, 255, 255, 0.92);
  border-radius: var(--radius);
  padding: 24px 26px;
}
.formula-card .eq {
  font-size: clamp(1rem, 2vw, 1.2rem);
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
  overflow-wrap: anywhere;
}
.formula-card .eq small {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.75);
  margin-top: 10px;
}
.formula-card .ex {
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  margin-top: 16px;
  padding-top: 14px;
  font-size: 0.92rem;
}
.formula-card .ex b {
  color: var(--accent);
}
.formula-card code {
  background: rgba(255, 255, 255, 0.12);
  border-radius: 6px;
  padding: 1px 7px;
  font-size: 0.9em;
}
.mini-table {
  margin-top: 26px;
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.mini-table th,
.mini-table td {
  text-align: left;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
}
.mini-table th {
  background: var(--brand-soft);
  color: var(--brand-dark);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.mini-table tr:last-child td {
  border-bottom: 0;
}
.mini-table td {
  color: var(--text-soft);
}

/* ---------- 相关工具 ---------- */
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.tool-section .tool-card h3 {
  margin-bottom: 6px;
}
.tool-section .tool-card p {
  margin-bottom: 12px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .tool-hero-inner {
    grid-template-columns: 1fr;
  }
  .calc-card {
    max-width: 640px;
  }
  .guide-grid,
  .related-grid {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 560px) {
  .calc-grid {
    grid-template-columns: 1fr;
  }
  .calc-grid .field.full {
    grid-column: auto;
  }
}