/* ============================================================
   KiMax 极境 — 编辑式极简设计系统
   纸面暖白 / 近黑墨色 / 唯一强调色品牌蓝 / 细分隔线代替卡片
   ============================================================ */

:root {
  --paper: #fbfaf7;
  --paper-dim: #f4f2ec;
  --ink: #141414;
  --ink-soft: #3d3d3a;
  --muted: #6b6b66;
  --line: #d8d5cc;
  --line-strong: #b9b6ab;
  --blue: #0b5cab;
  --blue-dark: #084a8a;
  --blue-wash: #eef4fa;
  --serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, "Courier New", monospace;
  --measure: 1320px;
  --gutter: clamp(20px, 4vw, 56px);
  --section-pad: clamp(36px, 4vw, 60px);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

[id] {
  scroll-margin-top: 96px;
}

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  /* 中文排版：词组不在中间断行，溢出时才兜底断开 */
  word-break: keep-all;
  overflow-wrap: break-word;
}

html[lang="en"] body {
  --serif: "Noto Serif", Georgia, serif;
  --sans: Inter, "Segoe UI", Arial, sans-serif;
  word-break: normal;
}

::selection {
  color: #fff;
  background: var(--blue);
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

p,
h1,
h2,
h3,
figure,
dl,
dd {
  margin: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.container {
  width: min(var(--measure), 100% - var(--gutter) * 2);
  margin-inline: auto;
}

.mono {
  font-family: var(--mono);
  font-feature-settings: "tnum";
}

.sr-only,
.skip-link {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link:focus {
  top: 12px;
  left: 12px;
  z-index: 300;
  width: auto;
  height: auto;
  padding: 10px 16px;
  overflow: visible;
  clip: auto;
  color: #fff;
  background: var(--ink);
}

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

/* ---------- 页头 ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  gap: 32px;
}

.brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
}

.brand img {
  width: 150px;
  height: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 30px);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-soft);
}

.site-nav a {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 8px 0;
  border-bottom: 1px solid transparent;
  transition: color 160ms ease, border-color 160ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--blue);
  border-bottom-color: var(--blue);
}

.nav-index {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 0.06em;
}

.site-nav a:hover .nav-index {
  color: var(--blue);
}

.site-nav .nav-cta {
  padding: 9px 18px;
  color: var(--paper);
  background: var(--ink);
  border: 1px solid var(--ink);
  transition: background 160ms ease, color 160ms ease;
}

.site-nav .nav-cta:hover,
.site-nav .nav-cta:focus-visible {
  color: var(--paper);
  background: var(--blue);
  border-color: var(--blue);
}

.language-picker {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  padding: 2px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0.02em;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
}

.language-picker a,
.language-picker span {
  min-width: 34px;
  padding: 7px 9px;
  text-align: center;
  border: 0;
  border-radius: 999px;
}

.language-picker a:hover,
.language-picker a:focus-visible {
  color: var(--blue);
  border-bottom-color: transparent;
}

.language-picker .is-current {
  color: var(--paper);
  background: var(--ink);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--line-strong);
}

.nav-toggle span:not(.sr-only) {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: var(--ink);
}

/* ---------- Hero ---------- */

.hero {
  padding: clamp(38px, 5vw, 76px) 0 clamp(28px, 3.5vw, 48px);
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(var(--paper), var(--paper)),
    var(--paper);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(28px, 4vw, 72px);
  align-items: center;
}

.hero-title-row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: clamp(14px, 1.8vw, 22px);
}

.hero-contact {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 5px 12px;
  margin-bottom: 8px;
  padding: 11px 12px;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  box-shadow: 5px 5px 0 rgba(20, 20, 20, 0.07);
}

.hero-contact img {
  width: 60px;
  height: auto;
  padding: 3px;
  background: #fff;
  border: 1px solid var(--line);
}

.hero-contact-info {
  display: grid;
  justify-items: start;
  gap: 4px;
}

.hero-contact-label {
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-contact-phone {
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(16px, 1.35vw, 18px);
  font-weight: 700;
  line-height: 1.05;
  border-bottom: 2px solid var(--blue);
  transition: color 180ms ease;
}

.hero-contact-phone:hover {
  color: var(--blue);
}

.hero-contact-hint {
  grid-column: 1 / -1;
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1.45;
}

@media (min-width: 641px) {
  .hero-title-row {
    flex-wrap: nowrap;
  }

  .hero-title-row > h1,
  .hero-contact {
    flex: none;
  }
}

.hero-meta {
  margin-bottom: 16px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero-meta::before {
  display: inline-block;
  width: 34px;
  height: 1px;
  margin-right: 12px;
  vertical-align: middle;
  content: "";
  background: var(--blue);
}

.hero h1 {
  font-family: var(--serif);
  font-size: clamp(40px, 5.6vw, 80px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: 0.01em;
}

.hero-title-line {
  display: block;
}

.hero h1 em {
  position: relative;
  font-style: normal;
  color: var(--blue);
}

.hero-lede {
  max-width: 30em;
  margin-top: 22px;
  color: var(--ink-soft);
  font-size: clamp(16px, 1.3vw, 19px);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.hero-note {
  max-width: 34em;
  margin-top: 20px;
  padding-top: 14px;
  color: var(--muted);
  font-size: 13.5px;
  border-top: 1px solid var(--line);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 14px 30px;
  border: 1px solid var(--ink);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.2;
  transition: background 180ms ease, color 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: var(--paper);
  background: var(--ink);
}

.button-primary:hover,
.button-primary:focus-visible {
  background: var(--blue);
  border-color: var(--blue);
}

.button-ghost {
  color: var(--ink);
  background: transparent;
}

.button-ghost:hover,
.button-ghost:focus-visible {
  color: var(--paper);
  background: var(--ink);
}

.button-dark {
  color: var(--paper);
  background: var(--ink);
  border-color: var(--paper);
}

.button-dark:hover,
.button-dark:focus-visible {
  color: var(--ink);
  background: var(--paper);
}

/* Hero 视觉：相图 + 产品图 */

.hero-visual {
  position: relative;
  min-height: 360px;
}

.phase-diagram {
  position: absolute;
  inset: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
  color: var(--ink);
  pointer-events: none;
}

.phase-grid line {
  stroke: var(--line-strong);
  stroke-width: 1;
}

.phase-supercritical-zone {
  fill: rgba(16, 103, 180, 0.14);
}

.phase-ticks path {
  fill: none;
  stroke: var(--line-strong);
  stroke-width: 1;
}

.phase-curve {
  fill: none;
  stroke: var(--ink);
  stroke-width: 1.7;
  stroke-linecap: round;
}

.phase-guides path {
  fill: none;
  stroke: var(--line-strong);
  stroke-width: 1;
  stroke-dasharray: 4 4;
}

.phase-critical {
  fill: var(--blue);
}

.phase-critical-halo {
  fill: rgba(16, 103, 180, 0.14);
}

.phase-labels text {
  fill: var(--muted);
  font-family: var(--mono);
  font-size: 13px;
  paint-order: stroke fill;
  stroke: rgba(251, 250, 247, 0.82);
  stroke-width: 2.5px;
  stroke-linejoin: round;
}

.phase-critical-label {
  fill: var(--blue) !important;
  font-size: 12px !important;
  font-weight: 600;
}

.phase-critical-value {
  fill: var(--blue) !important;
  font-size: 10.5px !important;
}

.phase-axis-note {
  font-size: 10.5px !important;
}

.phase-supercritical-label {
  fill: var(--blue) !important;
  font-weight: 500;
}

.phase-supercritical-note {
  fill: var(--blue) !important;
  font-size: 9.5px !important;
}

.hero-product {
  position: relative;
  z-index: 1;
  width: 100%;
  filter: saturate(1.02);
  mix-blend-mode: multiply;
}

/* Hero 产品指标条 */

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: clamp(28px, 3.5vw, 48px);
  border-top: 1px solid var(--ink);
}

.hero-metrics div {
  padding: 16px 22px 2px;
  border-right: 1px solid var(--line);
}

.hero-metrics div:first-child {
  padding-left: 0;
}

.hero-metrics div:last-child {
  border-right: 0;
}

.hero-metrics dt {
  color: var(--ink);
  font-size: 20px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.hero-metrics dt::after {
  display: block;
  width: 22px;
  height: 2px;
  margin-top: 6px;
  content: "";
  background: var(--blue);
}

.hero-metrics dd {
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
}

/* ---------- 通用分区 ---------- */

.section {
  padding: var(--section-pad) 0;
  border-bottom: 1px solid var(--line);
}

.section-head {
  max-width: 860px;
  margin-bottom: clamp(32px, 4vw, 48px);
}

.section-kicker {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 16px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
}

.section-kicker .mono {
  color: var(--blue);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.section-kicker::after {
  flex: 0 0 44px;
  height: 1px;
  content: "";
  background: var(--line-strong);
}

.section h2 {
  font-family: var(--serif);
  font-size: clamp(28px, 3.2vw, 44px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: 0.005em;
}

/* 长标题允许更宽松断行，避免“萃/取”“集/成”单字孤行 */
.section-head h2 {
  max-width: 22em;
}

.section-lede {
  max-width: 46em;
  margin-top: 18px;
  color: var(--ink-soft);
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 1.7;
}

.item-tag {
  margin-bottom: 12px;
  color: var(--blue);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.section h3 {
  font-family: var(--serif);
  font-size: clamp(19px, 1.6vw, 23px);
  font-weight: 700;
  line-height: 1.35;
}

.section p {
  color: var(--muted);
}

/* ---------- 01 工艺原理 ---------- */

.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 2.5vw, 40px);
  align-items: stretch;
}

.principle-item {
  display: flex;
  flex-direction: column;
  padding-top: 18px;
  border-top: 1px solid var(--ink);
}

.principle-item figure {
  margin-bottom: 18px;
  overflow: hidden;
  aspect-ratio: 1.94 / 1;
  background: var(--paper-dim);
  border: 1px solid var(--line);
}

.principle-item figure img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform 500ms ease;
}

.principle-item:hover figure img {
  transform: scale(1.03);
}

.principle-item h3 {
  margin-bottom: 10px;
}

.principle-item > p:last-child {
  margin-top: auto;
  padding-top: 10px;
}

/* ---------- 02 标准设备：目录式列表 ---------- */

.product-list {
  border-top: 1px solid var(--ink);
}

.product-row {
  border-bottom: 1px solid var(--line);
}

.product-row-link {
  display: grid;
  grid-template-columns: 56px minmax(150px, 210px) minmax(0, 1fr) minmax(220px, 280px);
  gap: clamp(18px, 2.8vw, 44px);
  align-items: center;
  padding: clamp(18px, 2.4vw, 30px) 0;
  transition: background 200ms ease;
}

a.product-row-link:hover {
  background: linear-gradient(90deg, var(--blue-wash), transparent 70%);
}

.product-no {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
}

a.product-row-link:hover .product-no {
  color: var(--blue);
}

.product-figure {
  display: grid;
  place-items: center;
  aspect-ratio: 4 / 3;
  padding: 12px;
  background: var(--paper-dim);
  border: 1px solid var(--line);
}

.product-figure img {
  max-height: 150px;
  object-fit: contain;
  transition: transform 400ms ease;
}

a.product-row-link:hover .product-figure img {
  transform: translateY(-4px);
}

.product-info {
  display: block;
  max-width: 760px;
}

.product-info h3 {
  margin-bottom: 8px;
  font-size: clamp(20px, 1.8vw, 26px);
}

.product-info > p {
  max-width: 46em;
  margin-bottom: 10px;
  font-size: 15px;
}

.fit-inline {
  display: block;
  margin-top: 6px;
  color: var(--ink);
  font-weight: 600;
}

.product-specs {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 14px 0 14px 20px;
  border-left: 1px solid var(--line);
  font-size: 12.5px;
  color: var(--ink-soft);
}

.product-specs div {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 12px;
  align-items: baseline;
}

.product-specs dt {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.product-specs dd {
  margin: 0;
  color: var(--ink);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
  color: var(--blue);
  font-size: 13.5px;
  font-weight: 700;
}

.text-link::after {
  content: "→";
  transition: transform 180ms ease;
}

a.product-row-link:hover .text-link::after,
.text-link:hover::after {
  transform: translateX(5px);
}

.product-schematic {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
  padding: 10px;
}

.product-schematic span {
  display: grid;
  place-items: center;
  min-height: 36px;
  padding: 6px;
  color: var(--ink-soft);
  background: var(--paper);
  border: 1px solid var(--line-strong);
  font-family: var(--mono);
  font-size: 11px;
  text-align: center;
}

.product-schematic span:last-child {
  grid-column: 1 / -1;
  color: var(--paper);
  background: var(--ink);
  border-color: var(--ink);
}

/* ---------- 03 参数对比 ---------- */

.table-wrap {
  overflow-x: auto;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.table-wrap:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

table {
  width: 100%;
  min-width: 960px;
  border-collapse: collapse;
  font-size: 14.5px;
}

th,
td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

thead th {
  color: var(--ink);
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--ink);
}

tbody th {
  color: var(--blue);
  font-size: 17px;
  font-weight: 500;
  white-space: nowrap;
}

tbody td {
  color: var(--ink-soft);
}

tbody td.mono {
  font-size: 13px;
  white-space: nowrap;
}

tbody tr {
  transition: background 160ms ease;
}

tbody tr:hover {
  background: var(--blue-wash);
}

tbody tr:last-child th,
tbody tr:last-child td {
  border-bottom: 0;
}

/* ---------- 04 技术实力 ---------- */

.advantages-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(24px, 3.5vw, 56px);
  align-items: start;
}

.advantages-lead {
  padding-top: 18px;
  border-top: 1px solid var(--ink);
}

.advantages-lead h3 {
  margin-bottom: 12px;
}

.advantages-lead > p {
  margin-bottom: 20px;
}

.advantages-metrics {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.advantages-metrics li {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 18px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.advantages-metrics strong {
  color: var(--ink);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.advantages-metrics span {
  color: var(--muted);
  font-size: 14px;
}

.advantages-visual {
  overflow: hidden;
  aspect-ratio: 2.05 / 1;
  background: var(--paper-dim);
  border: 1px solid var(--line);
}

.advantages-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center bottom;
}

/* ---------- 05 定制服务 ---------- */

.custom-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 32px);
  margin-bottom: clamp(28px, 3.5vw, 48px);
  align-items: stretch;
}

.custom-item {
  display: flex;
  flex-direction: column;
  padding-top: 16px;
  border-top: 1px solid var(--ink);
}

.custom-item figure {
  margin-bottom: 16px;
  overflow: hidden;
  aspect-ratio: 1.74 / 1;
  background: var(--paper-dim);
  border: 1px solid var(--line);
}

.custom-item figure img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform 500ms ease;
}

.custom-item:hover figure img {
  transform: scale(1.03);
}

.custom-body {
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
}

.custom-body h3 {
  margin-bottom: 8px;
  font-size: 18px;
}

.custom-body p:not(.item-tag) {
  font-size: 14px;
}

.custom-body p:last-child {
  margin-top: auto;
  padding-top: 8px;
}

.custom-delivery {
  display: grid;
  grid-template-columns: minmax(260px, 0.7fr) minmax(0, 1.3fr);
  gap: clamp(24px, 3.5vw, 56px);
  padding: clamp(22px, 3vw, 36px);
  color: var(--paper);
  background: var(--ink);
}

.custom-delivery h3 {
  margin-bottom: 14px;
  color: var(--paper);
}

.custom-delivery-lead p:not(.item-tag) {
  color: rgba(251, 250, 247, 0.7);
}

.custom-delivery .item-tag {
  color: #7db8ec;
}

.delivery-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: rgba(251, 250, 247, 0.18);
  border: 1px solid rgba(251, 250, 247, 0.18);
  counter-reset: delivery;
}

.delivery-steps li {
  position: relative;
  padding: 18px 16px 16px 44px;
  background: var(--ink);
  counter-increment: delivery;
}

.delivery-steps li::before {
  position: absolute;
  top: 20px;
  left: 16px;
  color: #7db8ec;
  font-family: var(--mono);
  font-size: 12px;
  content: counter(delivery, decimal-leading-zero);
}

.delivery-steps span {
  display: block;
  margin-bottom: 6px;
  color: var(--paper);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.delivery-steps p {
  color: rgba(251, 250, 247, 0.62);
  font-size: 12.5px;
  line-height: 1.6;
}

/* ---------- 06 应用场景 ---------- */

.application-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 2.5vw, 36px) clamp(16px, 2vw, 32px);
  align-items: stretch;
}

.application-item {
  display: flex;
  flex-direction: column;
  padding-top: 16px;
  border-top: 1px solid var(--line-strong);
}

.application-item img {
  width: 100%;
  aspect-ratio: 2 / 1;
  margin-bottom: 14px;
  object-fit: cover;
  background: var(--paper-dim);
  border: 1px solid var(--line);
  transition: filter 400ms ease;
}

.application-item:hover img {
  filter: saturate(1.12);
}

.application-item h3 {
  margin-bottom: 8px;
  font-size: 17.5px;
}

.application-item p {
  font-size: 14px;
}

.application-item > div:last-child {
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
}

.application-item > div:last-child p {
  margin-top: auto;
  padding-top: 8px;
}

/* ---------- FAQ ---------- */

.faq-grid {
  display: grid;
  grid-template-columns: minmax(280px, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(32px, 5vw, 88px);
  align-items: start;
}

.faq-head {
  position: sticky;
  top: 110px;
  margin-bottom: 0;
}

.faq-list {
  border-top: 1px solid var(--ink);
}

.faq-list details {
  border-bottom: 1px solid var(--line);
}

.faq-list summary {
  position: relative;
  display: block;
  padding: 16px 48px 16px 0;
  cursor: pointer;
  color: var(--ink);
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.5;
  list-style: none;
  transition: color 160ms ease;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  position: absolute;
  top: 17px;
  right: 4px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 18px;
  content: "+";
  transition: transform 220ms ease, color 160ms ease;
}

.faq-list details[open] summary::after {
  color: var(--blue);
  transform: rotate(45deg);
}

.faq-list summary:hover {
  color: var(--blue);
}

.faq-list summary:focus-visible {
  color: var(--blue);
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

.faq-list details p {
  max-width: 46em;
  padding: 0 48px 18px 0;
  color: var(--muted);
  font-size: 14.5px;
}

/* ---------- 联系咨询 ---------- */

.contact-section {
  padding: clamp(40px, 5vw, 72px) 0;
  color: var(--paper);
  background: var(--ink);
  border-bottom: 1px solid var(--line);
}

.contact-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  gap: clamp(28px, 4vw, 72px);
  align-items: center;
}

.contact-section .section-kicker {
  color: rgba(251, 250, 247, 0.55);
}

.contact-section .section-kicker::after {
  background: rgba(251, 250, 247, 0.3);
}

.contact-section h2 {
  max-width: 20em;
  margin-bottom: 20px;
  color: var(--paper);
  font-family: var(--serif);
  font-size: clamp(28px, 3.2vw, 46px);
  font-weight: 900;
  line-height: 1.28;
}

.contact-copy > p {
  max-width: 46em;
  color: rgba(251, 250, 247, 0.66);
  font-size: 15.5px;
  line-height: 1.9;
}

.contact-panel {
  display: grid;
  background: rgba(251, 250, 247, 0.045);
  border: 1px solid rgba(251, 250, 247, 0.26);
}

.wechat-contact {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 24px 26px;
}

.wechat-contact img {
  width: 108px;
  height: auto;
  padding: 5px;
  background: #fff;
}

.wechat-contact div {
  display: grid;
  gap: 5px;
  max-width: 12em;
}

.wechat-contact strong {
  color: var(--paper);
  font-size: 17px;
}

.wechat-contact span {
  color: rgba(251, 250, 247, 0.65);
  font-size: 13px;
  line-height: 1.6;
}

.contact-phone {
  display: grid;
  gap: 8px;
  justify-items: start;
  padding: 22px 26px 26px;
  border-top: 1px solid rgba(251, 250, 247, 0.16);
}

.contact-phone > span {
  color: rgba(251, 250, 247, 0.5);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.phone-link {
  color: var(--paper);
  font-family: var(--serif);
  font-size: clamp(28px, 2.8vw, 38px);
  font-weight: 700;
  line-height: 1.1;
  border-bottom: 2px solid var(--blue);
  transition: color 180ms ease, border-color 180ms ease;
}

.phone-link:hover {
  color: #7db8ec;
}

.contact-panel .button-dark {
  width: 100%;
  min-height: 58px;
  color: var(--ink);
  background: var(--paper);
  border: 0;
  border-top: 1px solid rgba(251, 250, 247, 0.16);
}

.contact-panel .button-dark:hover,
.contact-panel .button-dark:focus-visible {
  color: var(--paper);
  background: var(--blue);
}

/* ---------- 页脚 ---------- */

.site-footer {
  padding: clamp(36px, 4vw, 56px) 0 28px;
  color: var(--muted);
  background: var(--paper);
}

.footer-grid {
  display: grid;
  grid-template-columns: 0.85fr 1fr 1.2fr 0.95fr;
  gap: clamp(28px, 4vw, 64px);
  padding-bottom: 40px;
}

.footer-grid img {
  width: 96px;
  height: auto;
  margin-bottom: 14px;
}

.site-footer h2 {
  margin-bottom: 12px;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.site-footer p {
  color: var(--muted);
  font-size: 14px;
}

.footer-locations address {
  display: grid;
  gap: 12px;
  font-style: normal;
}

.footer-locations p {
  font-size: 13px;
  line-height: 1.65;
}

.footer-locations strong {
  display: block;
  margin-bottom: 2px;
  color: var(--ink);
  font-size: 13px;
}

.footer-tags {
  display: grid;
}

.footer-tags li {
  padding: 6px 0;
  color: var(--muted);
  font-size: 13.5px;
  border-bottom: 1px solid var(--line);
}

.footer-tags li:first-child {
  padding-top: 0;
}

.footer-tags li:last-child {
  border-bottom: 0;
}

.footer-contact {
  display: grid;
  gap: 10px;
  align-content: start;
  justify-items: start;
}

.footer-contact h2 {
  margin-bottom: 2px;
}

.footer-phone {
  color: var(--ink);
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.2;
  border-bottom: 2px solid var(--blue);
  transition: color 180ms ease;
}

.footer-phone:hover {
  color: var(--blue);
}

.footer-message {
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
}

.footer-message:hover {
  color: var(--blue);
}

.site-footer .footer-scope {
  max-width: 20em;
  margin-top: 8px;
  padding-top: 12px;
  font-size: 12.5px;
  line-height: 1.75;
  border-top: 1px solid var(--line);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding-top: 24px;
  font-size: 13px;
  border-top: 1px solid var(--line);
}

.footer-bottom a {
  color: var(--ink);
  font-weight: 600;
}

.footer-bottom a:hover {
  color: var(--blue);
}

/* ---------- 移动端快捷 CTA ---------- */

.mobile-quick-cta {
  display: none;
}

/* ---------- 滚动渐入 ---------- */

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 640ms ease, transform 640ms cubic-bezier(0.22, 0.61, 0.36, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ============================================================
   产品详情页（compact-detail / detail-deep）
   ============================================================ */

.compact-detail-page {
  background: var(--paper);
}

.detail-onepage {
  padding: clamp(28px, 4vw, 56px) 0 clamp(36px, 4vw, 64px);
  border-bottom: 1px solid var(--line);
}

.compact-detail-grid {
  display: grid;
  grid-template-areas:
    "intro visual"
    "decision visual";
  grid-template-columns: minmax(340px, 0.95fr) minmax(420px, 1.05fr);
  gap: clamp(24px, 3vw, 48px) clamp(32px, 4vw, 72px);
  align-items: start;
}

.compact-intro {
  grid-area: intro;
}

.compact-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 26px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.compact-breadcrumb a {
  color: var(--blue);
}

.compact-breadcrumb a:hover {
  text-decoration: underline;
}

.compact-intro .section-kicker {
  margin-bottom: 14px;
}

.compact-intro h1 {
  margin-bottom: 16px;
  font-family: var(--serif);
  font-size: clamp(26px, 2.8vw, 38px);
  font-weight: 900;
  line-height: 1.15;
}

.compact-lead {
  margin-bottom: 26px;
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.8;
}

.compact-specs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-bottom: 28px;
  background: var(--line);
  border: 1px solid var(--line);
}

.compact-spec {
  padding: 14px 16px;
  background: var(--paper);
}

.compact-spec strong {
  display: block;
  margin-bottom: 4px;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.compact-spec span {
  display: block;
  color: var(--ink);
  font-size: 13.5px;
  line-height: 1.55;
}

.compact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.compact-actions .button {
  min-height: 46px;
  padding: 12px 22px;
  font-size: 14px;
}

.button-secondary {
  color: var(--ink);
  background: transparent;
  border-color: var(--ink);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  color: var(--paper);
  background: var(--ink);
}

.compact-visual-panel {
  grid-area: visual;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.compact-product {
  display: grid;
  place-items: center;
  margin: 0;
  padding: 20px;
  background: var(--paper-dim);
  border: 1px solid var(--line);
  aspect-ratio: 4 / 3;
}

.compact-product img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  mix-blend-mode: multiply;
}

.compact-product figcaption {
  margin-top: 12px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

.compact-figure-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.compact-figure-strip figure {
  margin: 0;
  overflow: hidden;
  background: var(--paper-dim);
  border: 1px solid var(--line);
}

.compact-figure-strip img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.compact-figure-strip figcaption {
  padding: 8px 10px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

.compact-figure-strip figcaption span {
  display: block;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.compact-decision {
  grid-area: decision;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(20px, 2.5vw, 40px);
}

.compact-block {
  padding-top: 18px;
  border-top: 1px solid var(--ink);
}

.compact-block h2 {
  margin-bottom: 14px;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.compact-step-list {
  display: grid;
  gap: 10px;
  counter-reset: compact-step;
}

.compact-step-list li {
  position: relative;
  padding-left: 32px;
  color: var(--ink-soft);
  font-size: 13.5px;
  line-height: 1.6;
  counter-increment: compact-step;
}

.compact-step-list li::before {
  position: absolute;
  top: 2px;
  left: 0;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 11px;
  content: counter(compact-step, decimal-leading-zero);
}

.compact-tag-list {
  display: grid;
  gap: 10px;
}

.compact-tag-list li {
  position: relative;
  padding-left: 14px;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.6;
}

.compact-tag-list li::before {
  position: absolute;
  top: 9px;
  left: 0;
  width: 5px;
  height: 5px;
  content: "";
  background: var(--blue);
}

/* 底部固定横幅 */

.detail-bottom-banner {
  display: flex;
  gap: clamp(16px, 2vw, 36px);
  align-items: center;
  margin-top: clamp(32px, 4vw, 56px);
  padding: clamp(18px, 2.2vw, 28px) clamp(20px, 2.5vw, 36px);
  color: var(--paper);
  background: var(--ink);
}

.detail-bottom-copy {
  flex: 1 1 auto;
  min-width: 0;
}

.detail-bottom-copy span {
  display: block;
  margin-bottom: 4px;
  color: #7db8ec;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.detail-bottom-copy strong {
  display: block;
  color: var(--paper);
  font-family: var(--serif);
  font-size: clamp(15px, 1.4vw, 20px);
  font-weight: 700;
  line-height: 1.5;
}

.detail-bottom-tags {
  display: flex;
  flex: 0 1 auto;
  gap: 0;
  color: rgba(251, 250, 247, 0.8);
  font-family: var(--mono);
  font-size: 12px;
  white-space: nowrap;
}

.detail-bottom-tags span + span {
  margin-left: 16px;
  padding-left: 16px;
  border-left: 1px solid rgba(251, 250, 247, 0.3);
}

.detail-bottom-banner .button {
  flex: 0 0 auto;
  min-height: 44px;
  padding: 10px 22px;
  color: var(--ink);
  font-size: 14px;
  background: var(--paper);
  border-color: var(--paper);
}

.detail-bottom-banner .button:hover {
  color: var(--paper);
  background: var(--blue);
  border-color: var(--blue);
}

/* 详情页深度分区 */

.detail-deep-section .section-heading {
  max-width: 820px;
  margin-bottom: clamp(32px, 4vw, 56px);
}

.detail-deep-section .section-heading > p:not(.section-kicker) {
  max-width: 44em;
  margin-top: 18px;
  color: var(--muted);
  font-size: 16px;
}

.detail-matrix {
  display: grid;
  gap: clamp(20px, 2.5vw, 40px);
}

.detail-selection-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.detail-option-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.detail-card {
  padding-top: 20px;
  border-top: 1px solid var(--ink);
}

.detail-card h3 {
  margin-bottom: 14px;
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 700;
}

.detail-card p {
  color: var(--muted);
  font-size: 14.5px;
}

.detail-list {
  display: grid;
  gap: 12px;
}

.detail-list li {
  position: relative;
  padding-left: 16px;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.7;
}

.detail-list li::before {
  position: absolute;
  top: 10px;
  left: 0;
  width: 6px;
  height: 6px;
  content: "";
  background: var(--blue);
}

/* ============================================================
   详情页 · 8 块内容模板
   完整规格矩阵 / 夹具选件 / 技术特点 / 资料下载 / 信任状 / 样品测试
   ============================================================ */

/* 分区骨架 */

.spec-section {
  padding-top: clamp(40px, 5vw, 64px);
  border-top: 1px solid var(--line);
}

.spec-section + .spec-section {
  margin-top: clamp(40px, 5vw, 64px);
}

.spec-section .section-kicker {
  margin-bottom: 12px;
}

.spec-section > .spec-head {
  max-width: 760px;
  margin-bottom: clamp(24px, 3vw, 36px);
}

.spec-section > .spec-head h2 {
  margin-bottom: 12px;
  font-family: var(--serif);
  font-size: clamp(24px, 2.4vw, 34px);
  font-weight: 900;
  line-height: 1.2;
}

.spec-section > .spec-head p {
  max-width: 44em;
  color: var(--muted);
  font-size: 15.5px;
}

/* 1. 完整规格矩阵表 */

.spec-matrix-wrap {
  overflow-x: auto;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.spec-matrix {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  font-size: 14.5px;
}

.spec-matrix caption {
  padding: 12px 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-align: left;
  text-transform: uppercase;
  caption-side: top;
}

.spec-matrix th,
.spec-matrix td {
  padding: 14px 18px 14px 0;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.spec-matrix thead th {
  color: var(--ink);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--ink);
}

.spec-matrix tbody th {
  width: 220px;
  color: var(--ink-soft);
  font-weight: 600;
  white-space: nowrap;
}

.spec-matrix td {
  color: var(--ink);
}

.spec-matrix td.mono {
  font-size: 13.5px;
  white-space: nowrap;
}

.spec-matrix tbody tr:last-child th,
.spec-matrix tbody tr:last-child td {
  border-bottom: 0;
}

.spec-matrix .spec-na {
  color: var(--muted);
  font-size: 13.5px;
}

.spec-note {
  margin-top: 14px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

/* 2. 夹具 / 选件清单 */

.fixture-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.fixture-item {
  padding: 20px 22px;
  background: var(--paper);
}

.fixture-item .fixture-cat {
  display: block;
  margin-bottom: 8px;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.fixture-item strong {
  display: block;
  margin-bottom: 6px;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 700;
}

.fixture-item p {
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.6;
}

/* 3. 技术特点（编号列表） */

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(20px, 2.5vw, 40px) clamp(24px, 3vw, 56px);
  counter-reset: feat;
}

.feature-list li {
  position: relative;
  padding: 18px 0 0 46px;
  border-top: 1px solid var(--line);
  counter-increment: feat;
}

.feature-list li::before {
  position: absolute;
  top: 18px;
  left: 0;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  content: counter(feat, decimal-leading-zero);
}

.feature-list strong {
  display: block;
  margin-bottom: 6px;
  color: var(--ink);
  font-size: 15.5px;
  font-weight: 700;
}

.feature-list p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}

/* 4. 资料下载 */

.download-list {
  border-top: 1px solid var(--ink);
}

.download-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.download-item .dl-meta {
  min-width: 0;
}

.download-item .dl-type {
  display: inline-block;
  margin-right: 12px;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.download-item .dl-name {
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
}

.download-item .dl-desc {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

.download-item .dl-action {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  border: 1px solid var(--ink);
  transition: background 160ms ease, color 160ms ease;
}

.download-item .dl-action:hover {
  color: var(--paper);
  background: var(--ink);
}

.download-item.is-pending .dl-action {
  color: var(--muted);
  border-color: var(--line-strong);
  pointer-events: none;
}

/* 5. 信任状 */

.trust-identity {
  margin-top: clamp(24px, 3vw, 36px);
  color: var(--ink-soft);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.trust-identity .mono {
  margin-right: 14px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.trust-band {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 14px;
  color: var(--paper);
  background: rgba(20, 20, 20, 0.9);
  border: 1px solid var(--ink);
}

.trust-band .trust-cell {
  padding: 16px 22px;
  background: var(--ink);
}

.trust-band .trust-cell .trust-k {
  display: block;
  margin-bottom: 10px;
  color: #7db8ec;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.trust-band .trust-cell strong {
  display: block;
  margin-bottom: 6px;
  color: var(--paper);
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
}

.trust-band .trust-cell p {
  color: rgba(251, 250, 247, 0.62);
  font-size: 13px;
  line-height: 1.6;
}

/* 6. 样品测试 CTA（核心转化） */

.sample-test {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: clamp(28px, 4vw, 64px);
  align-items: center;
  padding: clamp(28px, 4vw, 52px);
  color: var(--paper);
  background: linear-gradient(135deg, var(--ink) 0%, #0f2f52 100%);
  border: 1px solid var(--ink);
}

.sample-test .st-kicker {
  display: block;
  margin-bottom: 14px;
  color: #7db8ec;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.sample-test h2 {
  margin-bottom: 14px;
  color: var(--paper);
  font-family: var(--serif);
  font-size: clamp(24px, 2.6vw, 38px);
  font-weight: 900;
  line-height: 1.25;
}

.sample-test .st-copy p {
  max-width: 40em;
  color: rgba(251, 250, 247, 0.7);
  font-size: 15px;
  line-height: 1.8;
}

.sample-test .st-steps {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin-top: 20px;
}

.sample-test .st-steps span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: rgba(251, 250, 247, 0.82);
  font-family: var(--mono);
  font-size: 12.5px;
}

.sample-test .st-steps span::before {
  width: 5px;
  height: 5px;
  content: "";
  background: var(--blue);
}

.sample-test .st-actions {
  display: grid;
  gap: 14px;
  justify-items: stretch;
}

.sample-test .st-actions .button {
  justify-content: center;
}

.sample-test .st-note {
  margin-top: 4px;
  color: rgba(251, 250, 247, 0.5);
  font-size: 12.5px;
  text-align: center;
}

/* 次级转化条（索取型录 + 留言） */

.sub-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: 18px;
  padding: 18px 22px;
  border: 1px solid var(--line);
}

.sub-cta p {
  color: var(--ink-soft);
  font-size: 14.5px;
}

.sub-cta p strong {
  color: var(--ink);
}

.sub-cta .sub-cta-actions {
  display: flex;
  gap: 12px;
}

/* ============================================================
   详情页 · 精简图文布局（5 块 / 8 图占位）
   ============================================================ */

/* 图片占位标记（开发期标识，方便替换） */

.img-slot {
  position: relative;
  overflow: hidden;
  background: var(--paper-dim);
  border: 1px solid var(--line);
}

.img-slot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.img-slot .slot-tag {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  padding: 4px 10px;
  color: var(--paper);
  background: rgba(20, 20, 20, 0.78);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* 规格块：左表右图 */

.spec-figure-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(300px, 0.9fr);
  gap: clamp(24px, 3.5vw, 56px);
  align-items: stretch;
}

.spec-figure-layout .img-slot {
  position: relative;
  overflow: hidden;
  min-height: 100%;
}

.spec-figure-layout .img-slot img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  padding: 16px;
  object-fit: contain;
}

/* 样品与夹具：图片卡片网格 */

.sample-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 28px);
}

.actual-fixture-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.sample-grid-label {
  margin: clamp(24px, 3vw, 36px) 0 14px;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
}

.sample-grid-label-secondary {
  margin-top: clamp(36px, 5vw, 56px);
}

.sample-card {
  display: flex;
  flex-direction: column;
}

.sample-card .img-slot {
  aspect-ratio: 4 / 3;
  margin-bottom: 12px;
}

.sample-card .img-slot img.diagram-asset {
  object-fit: contain;
  background: var(--paper-dim);
}

.sample-card .img-slot img.fixture-photo {
  object-fit: cover;
  background: var(--paper);
}

.sample-card .sample-kind {
  display: block;
  margin-bottom: 4px;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.sample-card strong {
  display: block;
  margin-bottom: 4px;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 16.5px;
  font-weight: 700;
}

.sample-card p {
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.55;
}

/* 技术特点：左大图右文字 */

.tech-layout {
  display: grid;
  grid-template-columns: minmax(320px, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(24px, 3.5vw, 56px);
  align-items: stretch;
}

.tech-layout .img-slot {
  position: relative;
  overflow: hidden;
  min-height: 100%;
  background: var(--paper);
}

.tech-layout .img-slot img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.tech-layout .img-slot img.diagram-asset {
  object-fit: contain;
  background: var(--paper);
}

.tech-layout .img-slot img.product-main-asset {
  object-fit: contain;
  background: #fff;
  transform: scale(1.2);
  transform-origin: center;
}

.tech-points {
  display: grid;
  gap: 0;
  counter-reset: feat;
}

.tech-points li {
  position: relative;
  padding: 18px 0 18px 46px;
  border-top: 1px solid var(--line);
  counter-increment: feat;
}

.tech-points li:first-child {
  border-top: 1px solid var(--ink);
}

.tech-points li::before {
  position: absolute;
  top: 20px;
  left: 0;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 12px;
  content: counter(feat, decimal-leading-zero);
}

.tech-points strong {
  display: block;
  margin-bottom: 5px;
  color: var(--ink);
  font-size: 16px;
  font-weight: 700;
}

.tech-points p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

/* 页尾精简带：信任状 + 资料 + CTA */

.detail-foot-slim {
  border-top: 1px solid var(--ink);
  padding-top: clamp(20px, 3vw, 32px);
}

.fit-head {
  max-width: 760px;
  margin-bottom: clamp(24px, 3vw, 36px);
}

.fit-head h2 {
  margin-bottom: 12px;
  font-family: var(--serif);
  font-size: clamp(22px, 2.2vw, 30px);
  font-weight: 900;
  line-height: 1.25;
}

.fit-head p:not(.section-kicker) {
  max-width: 44em;
  color: var(--muted);
  font-size: 15px;
}

.foot-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
  margin-bottom: 22px;
}

.foot-trust span {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--ink-soft);
  font-size: 13.5px;
}

.foot-trust span::before {
  width: 6px;
  height: 6px;
  content: "";
  background: var(--blue);
}

.foot-download {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 24px;
  padding: 14px 0;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 13.5px;
}

.foot-download strong {
  color: var(--ink);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.foot-download a {
  color: var(--blue);
  font-weight: 600;
}

/* 详情页底部：其他产品切换 */

.other-products {
  margin-top: clamp(32px, 4vw, 56px);
  border-top: 1px solid var(--ink);
}

.other-products-head {
  padding: 16px 0 0;
  margin-bottom: 18px;
}

.other-products-head .section-kicker {
  margin-bottom: 0;
}

.other-products-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(14px, 1.8vw, 24px);
}

.other-product-card {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 16px;
  border: 1px solid var(--line);
  transition: border-color 180ms ease, background 180ms ease;
}

.other-product-card:hover {
  background: var(--blue-wash);
  border-color: var(--blue);
}

.other-product-card img {
  flex: 0 0 72px;
  width: 72px;
  height: 72px;
  object-fit: contain;
  background: var(--paper-dim);
  border: 1px solid var(--line);
}

.other-product-card .op-info {
  min-width: 0;
}

.other-product-card .op-model {
  display: block;
  margin-bottom: 2px;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 500;
}

.other-product-card .op-name {
  display: block;
  margin-bottom: 4px;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.3;
}

.other-product-card .op-desc {
  display: block;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.4;
}

@media (max-width: 860px) {
  .other-products-grid {
    grid-template-columns: 1fr;
  }
}

/* 精简图文布局响应式 */

@media (max-width: 1080px) {
  .spec-figure-layout,
  .tech-layout {
    grid-template-columns: 1fr;
  }

  .spec-figure-layout .img-slot,
  .tech-layout .img-slot {
    position: relative;
    aspect-ratio: 16 / 10;
    max-width: 560px;
  }

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

@media (max-width: 640px) {
  .sample-grid {
    grid-template-columns: 1fr;
  }
}

/* 8 块模板的响应式 */

@media (max-width: 1080px) {
  .feature-list,
  .fixture-grid,
  .trust-band {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .sample-test {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .feature-list,
  .fixture-grid,
  .trust-band {
    grid-template-columns: 1fr;
  }

  .hero-title-row {
    align-items: stretch;
  }

  .hero-contact {
    width: 100%;
    margin-bottom: 0;
  }

  .hero-contact img {
    width: 76px;
  }

  .spec-matrix tbody th {
    width: 130px;
  }

  .download-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .sub-cta {
    flex-direction: column;
    align-items: stretch;
  }

  .sub-cta .sub-cta-actions {
    flex-direction: column;
  }
}

@media (max-width: 1080px) {
  .compact-detail-grid {
    grid-template-areas:
      "intro visual"
      "decision decision";
    grid-template-columns: minmax(0, 1fr) minmax(300px, 0.9fr);
  }

  .detail-option-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 860px) {
  .compact-detail-grid {
    grid-template-areas:
      "intro"
      "visual"
      "decision";
    grid-template-columns: 1fr;
  }

  .compact-decision {
    grid-template-columns: 1fr;
  }

  .detail-bottom-banner {
    flex-direction: column;
    align-items: stretch;
  }

  .detail-bottom-tags {
    display: none;
  }

  .detail-bottom-banner .button {
    width: 100%;
  }

  .detail-selection-grid,
  .detail-option-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .compact-specs,
  .compact-figure-strip {
    grid-template-columns: 1fr;
  }

  .compact-product img {
    height: 240px;
  }

  .compact-actions {
    display: grid;
    grid-template-columns: 1fr;
  }
}

/* ---------- 响应式 ---------- */

@media (max-width: 1080px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 0;
  }

  .phase-diagram {
    position: relative;
    height: auto;
    aspect-ratio: 4 / 3;
    margin-bottom: 18px;
  }

  .hero-product {
    margin-top: -18px;
  }

  .product-row-link {
    grid-template-columns: 56px minmax(160px, 240px) minmax(0, 1fr) minmax(200px, 240px);
  }

  .delivery-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .custom-grid,
  .application-grid,
  .principle-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .advantages-layout,
  .custom-delivery,
  .faq-grid,
  .contact-shell {
    grid-template-columns: 1fr;
  }

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

  .faq-head {
    position: static;
    margin-bottom: 40px;
  }
}

@media (max-width: 860px) {
  body {
    padding-bottom: 64px;
  }

  [id] {
    scroll-margin-top: 82px;
  }

  .nav-shell {
    min-height: 66px;
  }

  .brand img {
    width: 118px;
  }

  .nav-toggle {
    display: inline-block;
  }

  .site-nav {
    position: absolute;
    top: 66px;
    right: 14px;
    left: 14px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px;
    background: var(--paper);
    border: 1px solid var(--ink);
    box-shadow: 6px 6px 0 rgba(20, 20, 20, 0.12);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 13px 12px;
    border-bottom: 1px solid var(--line);
  }

  .site-nav a:last-child {
    border-bottom: 0;
  }

.site-nav .nav-phone {
  font-family: var(--mono);
  font-weight: 500;
  color: var(--ink);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

  .site-nav .nav-phone {
    display: none;
  }

  .site-nav .nav-cta {
    margin-top: 8px;
    text-align: center;
    justify-content: center;
  }

  .language-picker {
    align-self: flex-start;
    margin: 10px 12px 8px;
  }

  .language-picker a,
  .language-picker span {
    padding: 8px 10px;
    border-bottom: 0;
  }

  .hero-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-metrics div {
    padding: 16px 16px 4px;
    border-bottom: 1px solid var(--line);
  }

  .hero-metrics div:nth-child(2n) {
    border-right: 0;
  }

  .hero-metrics div:nth-child(3),
  .hero-metrics div:nth-child(4) {
    border-bottom: 0;
  }

  .product-row-link {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .product-no {
    order: -1;
  }

  .product-figure {
    max-width: 340px;
  }

  .product-specs {
    padding: 12px 0 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .mobile-quick-cta {
    position: fixed;
    right: 12px;
    bottom: 12px;
    left: 12px;
    z-index: 180;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    background: var(--paper);
    border: 1px solid var(--ink);
    box-shadow: 5px 5px 0 rgba(20, 20, 20, 0.14);
    opacity: 0;
    pointer-events: none;
    transform: translateY(calc(100% + 20px));
    transition: opacity 200ms ease, transform 200ms ease;
  }

  body[data-quick-cta-visible] .mobile-quick-cta {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .mobile-quick-cta a {
    display: grid;
    place-items: center;
    min-height: 52px;
    padding: 10px 8px;
    color: var(--ink);
    font-size: 14px;
    font-weight: 700;
    text-align: center;
  }

  .mobile-quick-cta a + a {
    border-left: 1px solid var(--line);
  }

  .mobile-quick-cta a:first-child {
    color: var(--paper);
    background: var(--blue);
  }
}

@media (max-width: 560px) {
  .custom-grid,
  .application-grid,
  .principle-grid,
  .delivery-steps {
    grid-template-columns: 1fr;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
  }

  .hero-metrics div,
  .hero-metrics div:nth-child(2n),
  .hero-metrics div:nth-child(3) {
    padding-left: 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .hero-metrics div:last-child {
    border-bottom: 0;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .wechat-contact,
  .contact-phone {
    padding-right: 20px;
    padding-left: 20px;
  }

  .contact-section h2,
  .contact-copy > p {
    word-break: normal;
  }

  .wechat-contact img {
    width: 96px;
  }

  .button {
    width: 100%;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
  }
}

/* ============================================================
   英文版排版修正（html[lang="en"]）
   英文词汇比中文长：导航提前折叠、参数标签纵排、
   技术实力标签列加宽、Hero 标题收窄字号保持两行设计
   ============================================================ */

/* Hero 标题：保证 "Supercritical Drying" 单行放下，避免四行堆叠 */
html[lang="en"] .hero h1 {
  font-size: clamp(34px, 3.8vw, 54px);
}

/* 设备行参数：英文标签不再挤 56px 窄列，改为标签在上、数值在下 */
html[lang="en"] .product-specs div {
  grid-template-columns: 1fr;
  gap: 3px;
}

/* 技术实力指标：加宽英文 mono 标签列，避免三行断行 */
html[lang="en"] .advantages-metrics li {
  grid-template-columns: minmax(180px, 0.8fr) 1.2fr;
}

/* 导航：英文菜单在 861–1200px 放不下，提前切换为折叠菜单 */
@media (min-width: 861px) and (max-width: 1200px) {
  html[lang="en"] .nav-toggle {
    display: inline-block;
  }

  html[lang="en"] .site-nav {
    position: absolute;
    top: 76px;
    right: 14px;
    left: 14px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px;
    background: var(--paper);
    border: 1px solid var(--ink);
    box-shadow: 6px 6px 0 rgba(20, 20, 20, 0.12);
  }

  html[lang="en"] .site-nav.is-open {
    display: flex;
  }

  html[lang="en"] .site-nav a {
    padding: 13px 12px;
    border-bottom: 1px solid var(--line);
  }

  html[lang="en"] .site-nav .nav-cta {
    margin-top: 8px;
    text-align: center;
    justify-content: center;
  }

  html[lang="en"] .language-picker {
    align-self: flex-start;
    margin: 10px 12px 8px;
  }

  html[lang="en"] .language-picker a,
  html[lang="en"] .language-picker span {
    padding: 8px 10px;
    border-bottom: 0;
  }
}