/* ====================================================================
   产品介绍页 通用样式（司南能碳智控器 Sinan EDC Lite 100 等）
   依赖：tailwind.css（基础工具类） + styles.css（导航/页脚/悬浮组件）
   ==================================================================== */

:root {
  --pdp-ink: #0b1220;
  --pdp-ink-soft: #334155;
  --pdp-muted: #64748b;
  --pdp-line: rgba(15, 23, 42, 0.08);
  --pdp-brand: #059669;
  --pdp-brand-2: #0d9488;
  --pdp-brand-soft: rgba(16, 185, 129, 0.1);
  --pdp-radius: 18px;
}

/* ---------- 布局容器 ---------- */
.pdp-container {
  width: 100%;
  max-width: 1320px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}
@media (min-width: 640px) {
  .pdp-container { padding-left: 24px; padding-right: 24px; }
}
@media (min-width: 1024px) {
  .pdp-container { padding-left: 40px; padding-right: 40px; }
}
@media (min-width: 1536px) {
  .pdp-container { padding-left: 56px; padding-right: 56px; }
}

.pdp-section {
  padding-top: 64px;
  padding-bottom: 64px;
}
@media (min-width: 1024px) {
  .pdp-section { padding-top: 96px; padding-bottom: 96px; }
}

/* ---------- 区块标题 ---------- */
.pdp-head {
  max-width: 720px;
  margin-bottom: 36px;
}
.pdp-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--pdp-brand-soft);
  color: var(--pdp-brand);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
}
.pdp-eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.18);
}
.pdp-h2 {
  margin: 18px 0 0;
  font-size: 28px;
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--pdp-ink);
}
.pdp-lead {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--pdp-muted);
}
@media (min-width: 768px) {
  .pdp-h2 { font-size: 34px; }
  .pdp-lead { font-size: 16px; }
}
@media (min-width: 1024px) {
  .pdp-h2 { font-size: 40px; }
}

.pdp-accent {
  background: linear-gradient(90deg, var(--pdp-brand), var(--pdp-brand-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ====================================================================
   HERO
   ==================================================================== */
.pdp-hero {
  position: relative;
  padding-top: 104px;
  padding-bottom: 64px;
  background: #060d19;
  overflow: hidden;
  isolation: isolate;
}
.pdp-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(760px 460px at 12% 8%, rgba(16, 185, 129, 0.22), transparent 62%),
    radial-gradient(700px 520px at 88% 22%, rgba(13, 148, 136, 0.2), transparent 64%),
    radial-gradient(600px 420px at 50% 108%, rgba(56, 189, 248, 0.12), transparent 60%);
  z-index: -2;
}
.pdp-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(900px 600px at 30% 20%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(900px 600px at 30% 20%, #000 20%, transparent 78%);
  z-index: -1;
}

.pdp-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.5);
}
.pdp-crumb a { color: rgba(255, 255, 255, 0.72); transition: color 0.2s ease; }
.pdp-crumb a:hover { color: #34d399; }
.pdp-crumb span { color: rgba(255, 255, 255, 0.28); }

.pdp-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 44px;
  align-items: center;
  margin-top: 34px;
}
@media (min-width: 1024px) {
  .pdp-hero-grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    gap: 56px;
  }
  .pdp-hero { padding-top: 130px; padding-bottom: 88px; }
}

.pdp-hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 15px;
  border-radius: 999px;
  border: 1px solid rgba(52, 211, 153, 0.35);
  background: rgba(16, 185, 129, 0.12);
  color: #6ee7b7;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
}
.pdp-hero-title {
  margin: 22px 0 0;
  font-size: 36px;
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #ffffff;
}
.pdp-hero-en {
  margin: 12px 0 0;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: rgba(110, 231, 183, 0.85);
}
.pdp-hero-desc {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.62);
}
@media (min-width: 768px) {
  .pdp-hero-title { font-size: 48px; }
  .pdp-hero-desc { font-size: 16px; }
}
@media (min-width: 1280px) {
  .pdp-hero-title { font-size: 56px; }
}

.pdp-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}
.pdp-btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 14px 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease, border-color 0.25s ease;
}
.pdp-btn svg { transition: transform 0.25s ease; }
.pdp-btn:hover svg { transform: translateX(3px); }
.pdp-btn-primary {
  color: #ffffff;
  background: linear-gradient(90deg, #059669, #0d9488);
  box-shadow: 0 16px 32px -16px rgba(5, 150, 105, 0.9);
}
.pdp-btn-primary:hover { transform: translateY(-2px); box-shadow: 0 20px 38px -14px rgba(5, 150, 105, 0.95); }
.pdp-btn-ghost {
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(8px);
}
.pdp-btn-ghost:hover { background: rgba(255, 255, 255, 0.14); border-color: rgba(255, 255, 255, 0.4); transform: translateY(-2px); }

.pdp-hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 30px;
  padding-top: 26px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}
.pdp-hero-point {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
}
.pdp-hero-point svg { color: #34d399; flex-shrink: 0; }

/* 产品图 */
.pdp-hero-visual {
  position: relative;
}
.pdp-shot {
  position: relative;
  border-radius: 26px;
  overflow: hidden;
  background: linear-gradient(155deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.02));
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 40px 80px -40px rgba(0, 0, 0, 0.9);
}
.pdp-shot img {
  width: 100%;
  height: auto;
  display: block;
}
.pdp-shot::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 13, 25, 0) 55%, rgba(6, 13, 25, 0.75) 100%);
  pointer-events: none;
}
.pdp-shot-cap {
  position: absolute;
  left: 22px;
  right: 22px;
  bottom: 18px;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.pdp-shot-cap strong { display: block; font-size: 14px; color: #ffffff; }
.pdp-shot-cap span { font-size: 12px; color: rgba(255, 255, 255, 0.6); }

.pdp-chip {
  position: absolute;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(9, 18, 32, 0.82);
  backdrop-filter: blur(10px);
  box-shadow: 0 18px 34px -20px rgba(0, 0, 0, 0.9);
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.8);
  white-space: nowrap;
}
.pdp-chip b { color: #6ee7b7; font-size: 13px; }
.pdp-chip-a { top: 8%; left: -14px; }
.pdp-chip-b { bottom: 22%; right: -10px; }
@media (max-width: 1023px) {
  .pdp-chip-a { left: 10px; }
  .pdp-chip-b { right: 10px; }
}
@media (max-width: 640px) {
  .pdp-chip { font-size: 11.5px; padding: 8px 11px; }
  .pdp-chip-b { display: none; }
}

/* ====================================================================
   关键指标条
   ==================================================================== */
.pdp-metrics {
  background: #ffffff;
  border-bottom: 1px solid var(--pdp-line);
}
.pdp-metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--pdp-line);
  border: 1px solid var(--pdp-line);
  border-radius: var(--pdp-radius);
  overflow: hidden;
}
@media (min-width: 768px) {
  .pdp-metrics-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
  .pdp-metrics-grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}
.pdp-metric {
  background: #ffffff;
  padding: 22px 18px;
  text-align: center;
  transition: background-color 0.3s ease;
}
.pdp-metric:hover { background: #f0fdfa; }
.pdp-metric b {
  display: block;
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--pdp-ink);
}
@media (min-width: 1024px) {
  .pdp-metric b { font-size: 28px; }
}
.pdp-metric b i {
  font-style: normal;
  font-size: 14px;
  font-weight: 700;
  color: var(--pdp-brand);
  margin-left: 2px;
}
.pdp-metric span {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  color: var(--pdp-muted);
}

/* 方案对比（传统三套系统 → 一台控制器） */
.pdp-compare {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-bottom: 40px;
}
@media (min-width: 768px) {
  .pdp-compare { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
.pdp-compare-item {
  padding: 20px 22px;
  border: 1px solid var(--pdp-line);
  border-radius: var(--pdp-radius);
  background: linear-gradient(180deg, #ffffff, #f8fafc);
}
.pdp-compare-k {
  display: block;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--pdp-muted);
}
.pdp-compare-old {
  display: block;
  margin-top: 8px;
  font-size: 14px;
  color: #94a3b8;
  text-decoration: line-through;
  text-decoration-color: rgba(148, 163, 184, 0.55);
}
.pdp-compare-new {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
  font-size: 17px;
  font-weight: 800;
  color: var(--pdp-brand);
}
.pdp-compare-new::before {
  content: '';
  width: 14px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, #10b981, #14b8a6);
}

/* ====================================================================
   核心能力卡片
   ==================================================================== */
.pdp-cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}
@media (min-width: 640px) {
  .pdp-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
  .pdp-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
}
@media (min-width: 1280px) {
  .pdp-cards { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

.pdp-card {
  position: relative;
  padding: 28px 26px 26px;
  border: 1px solid var(--pdp-line);
  border-radius: var(--pdp-radius);
  background: #ffffff;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.03);
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.pdp-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #10b981, #14b8a6);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.pdp-card:hover {
  transform: translateY(-5px);
  border-color: rgba(16, 185, 129, 0.28);
  box-shadow: 0 22px 44px -26px rgba(5, 150, 105, 0.5);
}
.pdp-card:hover::before { opacity: 1; }
.pdp-card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.14), rgba(20, 184, 166, 0.08));
  color: var(--pdp-brand);
}
.pdp-card-idx {
  position: absolute;
  top: 20px;
  right: 22px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: rgba(15, 23, 42, 0.2);
  transition: color 0.3s ease;
}
.pdp-card:hover .pdp-card-idx { color: rgba(5, 150, 105, 0.55); }
@media (max-width: 639px) {
  .pdp-card { padding: 24px 20px; }
}
.pdp-card h3 {
  margin: 18px 0 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--pdp-ink);
}
.pdp-card p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--pdp-muted);
}
.pdp-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 16px;
}
.pdp-tag {
  padding: 4px 11px;
  border-radius: 999px;
  background: #f1f5f9;
  border: 1px solid rgba(15, 23, 42, 0.06);
  font-size: 11.5px;
  color: var(--pdp-ink-soft);
}
/* 章节内的次级分组（碳监测配套、平台协同能力、典型应用场景等） */
.pdp-cap-split {
  margin-top: 48px;
  padding-top: 36px;
  border-top: 1px dashed var(--pdp-line);
}
.pdp-cap-split-hd { margin-bottom: 24px; }
.pdp-cap-split-hd span {
  display: block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--pdp-accent, #059669);
}
.pdp-cap-split-hd h3 {
  margin: 10px 0 8px;
  font-size: 20px;
  font-weight: 700;
  color: var(--pdp-ink);
}
@media (min-width: 768px) {
  .pdp-cap-split-hd h3 { font-size: 22px; }
}
.pdp-cap-split-hd p {
  margin: 0;
  max-width: 760px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--pdp-muted);
}
/* 紧凑清单（可选配套等） */
.pdp-extras {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}
@media (min-width: 768px) {
  .pdp-extras { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1280px) {
  .pdp-extras { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
.pdp-extra {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 16px;
  border: 1px solid var(--pdp-line);
  border-radius: 14px;
  background: #ffffff;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.pdp-extra:hover {
  transform: translateY(-2px);
  border-color: rgba(16, 185, 129, 0.28);
  box-shadow: 0 14px 28px -22px rgba(5, 150, 105, 0.6);
}
.pdp-extra svg { flex: none; margin-top: 2px; color: var(--pdp-brand); }
.pdp-extra b {
  display: block;
  font-size: 13.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--pdp-ink);
}
.pdp-extra span {
  display: block;
  margin-top: 3px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--pdp-muted);
}



/* ====================================================================
   云边端架构
   ==================================================================== */
.pdp-arch {
  background: #f8fafc;
  border-top: 1px solid var(--pdp-line);
  border-bottom: 1px solid var(--pdp-line);
}
.pdp-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}
@media (min-width: 900px) {
  .pdp-flow { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; align-items: stretch; }
}
.pdp-flow-step {
  position: relative;
  padding: 26px 24px;
  border-radius: var(--pdp-radius);
  background: #ffffff;
  border: 1px solid var(--pdp-line);
}
.pdp-flow-step.is-core {
  border-color: rgba(16, 185, 129, 0.4);
  box-shadow: 0 24px 48px -32px rgba(5, 150, 105, 0.65);
  background: linear-gradient(180deg, #ffffff, #f0fdfa);
}
@media (min-width: 900px) {
  .pdp-flow-step + .pdp-flow-step::before {
    content: '';
    position: absolute;
    left: -14px;
    top: 50%;
    width: 8px;
    height: 8px;
    margin-top: -4px;
    border-top: 2px solid rgba(16, 185, 129, 0.55);
    border-right: 2px solid rgba(16, 185, 129, 0.55);
    transform: rotate(45deg);
  }
}
.pdp-flow-idx {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 9px;
  background: rgba(16, 185, 129, 0.12);
  color: var(--pdp-brand);
  font-size: 12px;
  font-weight: 800;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.pdp-flow-step h4 {
  margin: 14px 0 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--pdp-ink);
}
.pdp-flow-step > p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--pdp-muted);
}
.pdp-flow-list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}
.pdp-flow-list li {
  display: flex;
  gap: 9px;
  font-size: 13px;
  color: var(--pdp-ink-soft);
}
.pdp-flow-list li::before {
  content: '';
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  margin-top: 7px;
  border-radius: 50%;
  background: #10b981;
}

.pdp-note + .pdp-note { margin-top: 12px; }
.pdp-cap-split .pdp-note { margin-top: 22px; }

/* ====================================================================
   技术规格
   ==================================================================== */
.pdp-specs {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}
@media (min-width: 900px) {
  .pdp-specs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
.pdp-spec-card {
  border: 1px solid var(--pdp-line);
  border-radius: var(--pdp-radius);
  background: #ffffff;
  overflow: hidden;
}
.pdp-spec-hd {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 22px;
  background: linear-gradient(90deg, rgba(16, 185, 129, 0.1), rgba(20, 184, 166, 0.02));
  border-bottom: 1px solid var(--pdp-line);
}
.pdp-spec-hd h4 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--pdp-ink);
}
.pdp-spec-row {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
  gap: 14px;
  padding: 13px 22px;
  border-bottom: 1px solid rgba(15, 23, 42, 0.05);
  font-size: 13.5px;
}
.pdp-spec-row:last-child { border-bottom: 0; }
.pdp-spec-row dt { color: var(--pdp-muted); }
.pdp-spec-row dd { margin: 0; color: var(--pdp-ink-soft); font-weight: 500; }
@media (max-width: 520px) {
  .pdp-spec-row { grid-template-columns: minmax(0, 1fr); gap: 4px; }
}

.pdp-note {
  margin-top: 26px;
  padding: 16px 20px;
  border-radius: 14px;
  background: #f8fafc;
  border: 1px dashed rgba(15, 23, 42, 0.12);
  font-size: 13px;
  line-height: 1.8;
  color: var(--pdp-muted);
}

/* ====================================================================
   交付流程 + 服务模式
   ==================================================================== */
.pdp-delivery {
  background: #f8fafc;
  border-top: 1px solid var(--pdp-line);
  border-bottom: 1px solid var(--pdp-line);
}
.pdp-timeline {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  counter-reset: day;
}
@media (min-width: 768px) {
  .pdp-timeline { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
  .pdp-timeline { grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 14px; }
}
.pdp-day {
  position: relative;
  padding: 24px 20px;
  border-radius: var(--pdp-radius);
  background: #ffffff;
  border: 1px solid var(--pdp-line);
}
.pdp-day::after {
  content: '';
  position: absolute;
  right: -8px;
  top: 50%;
  width: 8px;
  height: 8px;
  margin-top: -4px;
  border-top: 2px solid rgba(16, 185, 129, 0.5);
  border-right: 2px solid rgba(16, 185, 129, 0.5);
  transform: rotate(45deg);
  display: none;
}
@media (min-width: 1024px) {
  .pdp-day:not(:last-child)::after { display: block; }
}
.pdp-day em {
  font-style: normal;
  display: inline-block;
  padding: 4px 10px;
  border-radius: 8px;
  background: rgba(16, 185, 129, 0.12);
  color: var(--pdp-brand);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.04em;
}
.pdp-day h4 {
  margin: 14px 0 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--pdp-ink);
}
.pdp-day p {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--pdp-muted);
}

.pdp-models {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin-top: 56px;
}
@media (min-width: 768px) {
  .pdp-models { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
.pdp-model {
  padding: 28px 24px;
  border-radius: var(--pdp-radius);
  border: 1px solid var(--pdp-line);
  background: #ffffff;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.pdp-model:hover { transform: translateY(-4px); box-shadow: 0 22px 44px -28px rgba(15, 23, 42, 0.45); }
.pdp-model.is-hot {
  border-color: rgba(16, 185, 129, 0.45);
  box-shadow: 0 24px 48px -34px rgba(5, 150, 105, 0.7);
}
.pdp-model h4 {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--pdp-ink);
}
.pdp-model .pdp-model-sub {
  margin: 8px 0 0;
  font-size: 13px;
  color: var(--pdp-brand);
  font-weight: 600;
}
.pdp-model ul {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}
.pdp-model li {
  display: flex;
  gap: 9px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--pdp-muted);
}
.pdp-model li svg { flex-shrink: 0; margin-top: 3px; color: #10b981; }

/* ====================================================================
   FAQ
   ==================================================================== */
.pdp-faq {
  max-width: 900px;
  border-top: 1px solid var(--pdp-line);
}
.pdp-qa {
  border-bottom: 1px solid var(--pdp-line);
}
.pdp-qa-btn {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  padding: 22px 4px;
  border: 0;
  background: transparent;
  text-align: left;
  cursor: pointer;
  font-family: inherit;
  font-size: 16px;
  font-weight: 600;
  color: var(--pdp-ink);
  transition: color 0.2s ease;
}
.pdp-qa-btn:hover { color: var(--pdp-brand); }
.pdp-qa-btn i {
  font-style: normal;
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(16, 185, 129, 0.12);
  color: var(--pdp-brand);
  font-size: 12px;
  font-weight: 800;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.pdp-qa-arrow {
  margin-left: auto;
  flex-shrink: 0;
  color: #94a3b8;
  transition: transform 0.3s ease, color 0.3s ease;
}
.pdp-qa.is-open .pdp-qa-arrow { transform: rotate(180deg); color: var(--pdp-brand); }
.pdp-qa-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.pdp-qa-panel p {
  margin: 0;
  padding: 0 4px 22px 42px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--pdp-muted);
}

/* ====================================================================
   CTA
   ==================================================================== */
.pdp-cta {
  position: relative;
  padding: 64px 0;
  background: linear-gradient(120deg, #047857, #0d9488 55%, #0f766e);
  overflow: hidden;
}
.pdp-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.08) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: 0.5;
}
.pdp-cta-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: center;
}
@media (min-width: 900px) {
  .pdp-cta-inner { grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.9fr); }
}
.pdp-cta h2 {
  margin: 0;
  font-size: 28px;
  line-height: 1.3;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.02em;
}
.pdp-cta p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.78);
}
@media (min-width: 768px) {
  .pdp-cta h2 { font-size: 34px; }
}
.pdp-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.pdp-btn-light {
  background: #ffffff;
  color: #047857;
}
.pdp-btn-light:hover { transform: translateY(-2px); box-shadow: 0 18px 34px -18px rgba(0, 0, 0, 0.5); }
.pdp-btn-outline {
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.5);
}
.pdp-btn-outline:hover { background: rgba(255, 255, 255, 0.14); transform: translateY(-2px); }

/* ====================================================================
   入场动画
   ==================================================================== */
.pdp-reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.pdp-reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .pdp-reveal { opacity: 1; transform: none; transition: none; }
  .pdp-card, .pdp-model, .pdp-extra { transition: none; }
}