/* ============================================
   AIC 子页面公共样式
   series-stainless.html 等定制款详情页使用
   ============================================ */

/* ---------- Sub Hero (二级页通用 Hero) ---------- */
.sub-hero {
  background: var(--ink);
  color: #fff;
  padding: 80px 0 100px;
  position: relative;
  overflow: hidden;
}

.sub-hero.stainless-hero {
  background:
    radial-gradient(ellipse at 70% 30%, rgba(232, 237, 243, 0.18), transparent 55%),
    linear-gradient(135deg, #2A3548 0%, #3D4F6B 60%, #5A6E8A 100%);
}

.sub-hero-grid {
  position: absolute;
  inset: 0;
  opacity: 0.06;
  background-image:
    linear-gradient(rgba(255,255,255,.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.5) 1px, transparent 1px);
  background-size: 80px 80px;
  pointer-events: none;
}

.sub-hero-inner {
  position: relative;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

.stainless-badge {
  display: inline-block;
  font-family: "JetBrains Mono", monospace;
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #fff;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.2);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}

.sub-hero h1 {
  font-family: "Barlow Condensed", "Noto Sans SC", sans-serif;
  font-size: 60px;
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin-bottom: 22px;
  color: #fff;
}

.sub-hero .lead {
  font-size: 16.5px;
  color: #DCE3EE;
  max-width: 720px;
  line-height: 1.75;
  margin-bottom: 36px;
}

.sub-hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.sub-hero-actions .btn-primary {
  background: #fff;
  color: var(--ink);
}

.sub-hero-actions .btn-primary:hover {
  background: #F0F4FB;
  color: var(--accent-deep);
}

.sub-hero-actions .btn-ghost {
  color: #fff;
  border-color: rgba(255,255,255,.4);
}

.sub-hero-actions .btn-ghost:hover {
  background: #fff;
  color: var(--ink);
  border-color: #fff;
}

/* ---------- Material Features (4 大材料特点) ---------- */
.material-features {
  padding: 100px 0;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 32px;
  padding-right: 32px;
}

.material-features-head {
  text-align: center;
  margin-bottom: 56px;
}

.material-features-head .eyebrow {
  display: inline-block;
}

.material-features-head h2 {
  font-family: "Barlow Condensed", "Noto Sans SC", sans-serif;
  font-size: 44px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 6px 0 14px;
  color: var(--ink);
}

.material-features-head p {
  font-size: 15px;
  color: var(--mute);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.75;
}

.material-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.material-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 32px 28px;
  transition: all var(--t-base);
  position: relative;
}

.material-card:hover {
  border-color: var(--steel);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.mc-icon-wrap {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 22px;
}

.mc-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--steel) 0%, var(--ink-2) 100%);
  color: #fff;
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.mc-num {
  font-family: "Barlow Condensed", sans-serif;
  font-size: 30px;
  font-weight: 800;
  color: var(--line);
  line-height: 1;
  letter-spacing: -0.04em;
}

.material-card h4 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 12px;
  color: var(--ink);
}

.material-card p {
  font-size: 13.5px;
  color: var(--mute);
  line-height: 1.75;
}

/* ---------- Stainless Specs (规格列表) ---------- */
.stainless-specs {
  padding: 100px 0;
  background: var(--bg);
}

.specs-row-head {
  max-width: var(--container);
  margin: 0 auto 48px;
  padding: 0 32px;
  text-align: center;
}

.specs-row-head .eyebrow {
  display: inline-block;
}

.specs-row-head h2 {
  font-family: "Barlow Condensed", "Noto Sans SC", sans-serif;
  font-size: 44px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 6px 0 14px;
  color: var(--ink);
}

.specs-row-head h2 .count {
  font-family: "JetBrains Mono", monospace;
  font-size: 15px;
  font-weight: 500;
  color: var(--mute);
}

.specs-row-head p {
  font-size: 15px;
  color: var(--mute);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.75;
}

.stainless-specs .model-grid {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

/* ---------- Suitable Industries (6 个适用行业) ---------- */
.suitable-industries {
  padding: 100px 0;
  background: #fff;
}

.suitable-industries .section-head {
  max-width: var(--container);
  margin: 0 auto 48px;
  padding: 0 32px;
}

.ind-grid {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.ind-card {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 30px 28px;
  transition: all var(--t-base);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.ind-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
  background: #fff;
}

.ind-card-icon {
  width: 36px;
  height: 36px;
  color: var(--steel);
}

.ind-card h5 {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.3;
}

.ind-card p {
  font-size: 13.5px;
  color: var(--mute);
  line-height: 1.75;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .sub-hero h1 { font-size: 44px; }
  .material-grid { grid-template-columns: repeat(2, 1fr); }
  .ind-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .sub-hero { padding: 56px 0 80px; }
  .sub-hero h1 { font-size: 32px; }
  .material-features, .stainless-specs, .suitable-industries { padding: 70px 0; }
  .material-features-head h2, .specs-row-head h2 { font-size: 32px; }
  .material-grid, .ind-grid { grid-template-columns: 1fr; }
}