/* ============================================================
   百锐传动 Parei — 站点主样式
   设计规范：
   - 品牌黄 #f8c301（主按钮 / 强调 / 高亮）
   - 深色   #222222（页头 / 页脚 / 标题）
   - 正文   #333333，辅助文字 #7b7b7b，浅灰底 #f9fafa
   - 移动优先：默认即移动端布局，≥720px 平板，≥1080px 桌面
   ============================================================ */

:root {
  --c-primary: #f8c301;
  --c-primary-dark: #dcae00;
  --c-dark: #222;
  --c-darker: #181818;
  --c-text: #333;
  --c-muted: #7b7b7b;
  --c-bg-alt: #f9fafa;
  --c-border: #e5e5e5;
  --c-white: #fff;

  --font-sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas,
    monospace;

  --container: 1200px;
  --radius: 4px;
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  --header-h: 64px;
}

/* ---------- 基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-text);
  background: var(--c-white);
  overflow-x: hidden;
}

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

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

h1,
h2,
h3,
h4 {
  color: var(--c-dark);
  line-height: 1.3;
  margin: 0 0 0.6em;
  font-weight: 700;
}

p {
  margin: 0 0 1em;
}

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

button {
  font-family: inherit;
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--c-primary);
  outline-offset: 2px;
}

.screen-reader-text {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 32px;
  font-size: 1rem;
  font-weight: 500;
  border: 2px solid transparent;
  border-radius: var(--radius);
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  min-height: 44px;
}

.btn-primary {
  background: var(--c-primary);
  color: var(--c-white);
}

.btn-primary:hover {
  background: var(--c-dark);
}

.btn-ghost {
  border-color: rgba(255, 255, 255, 0.7);
  color: var(--c-white);
}

.btn-ghost:hover {
  background: var(--c-white);
  color: var(--c-dark);
  border-color: var(--c-white);
}

.btn-dark {
  background: var(--c-dark);
  color: var(--c-white);
}

.btn-dark:hover {
  background: var(--c-primary);
}

.btn .icon {
  width: 1em;
  height: 1em;
  flex: none;
}

/* ---------- 顶部联系条 ---------- */
.topbar {
  background: var(--c-dark);
  color: rgba(255, 255, 255, 0.85);
  font-size: 13px;
  border-top: 1px solid #424242;
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 40px;
}

.topbar-contacts {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 22px;
}

.topbar-contacts a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 0.2s;
}

.topbar-contacts a:hover {
  color: var(--c-primary);
}

.topbar .icon {
  width: 14px;
  height: 14px;
  color: var(--c-primary);
}

.topbar-social {
  display: flex;
  gap: 10px;
}

.topbar-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  transition: background 0.2s;
}

.topbar-social a:hover {
  background: var(--c-primary);
}

.topbar-social .icon {
  width: 13px;
  height: 13px;
}

@media (max-width: 1079px) {
  .topbar {
    display: none; /* 顶栏联系信息在移动端收进抽屉菜单，避免占高度 */
  }
}

/* ---------- 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--c-dark);
  border-top: 1px solid #424242;
  transition: box-shadow 0.2s;
}

.site-header.is-scrolled {
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.35);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: var(--header-h);
}

.brand img {
  height: 44px;
  width: auto;
}

.site-nav {
  margin-left: auto;
}

.site-nav ul {
  display: flex;
  gap: 4px;
}

.site-nav a {
  display: block;
  padding: 8px 16px;
  color: rgba(255, 255, 255, 0.88);
  font-size: 15px;
  border-radius: var(--radius);
  transition: color 0.2s, background 0.2s;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--c-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: none;
}

/* ---------- 语言切换（图标 + 下拉） ---------- */
.lang-switch {
  position: relative;
}

.lang-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  color: rgba(255, 255, 255, 0.85);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 999px;
  transition: background 0.2s, color 0.2s;
}

.lang-btn:hover,
.lang-switch.is-open .lang-btn {
  background: rgba(255, 255, 255, 0.16);
  color: var(--c-white);
}

.lang-btn .icon {
  width: 15px;
  height: 15px;
}

.lang-btn .chev {
  width: 12px;
  height: 12px;
  transition: transform 0.2s;
}

.lang-switch.is-open .chev {
  transform: rotate(180deg);
}

.lang-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 150px;
  margin: 0;
  padding: 6px;
  list-style: none;
  background: var(--c-dark);
  border: 1px solid #3a3a3a;
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 0.18s, transform 0.18s, visibility 0.18s;
  z-index: 110;
}

.lang-switch.is-open .lang-menu {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.lang-menu a,
.lang-menu span {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  font-size: 13.5px;
  border-radius: 3px;
  color: rgba(255, 255, 255, 0.8);
  white-space: nowrap;
}

.lang-menu a:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--c-white);
}

.lang-menu .icon {
  width: 14px;
  height: 14px;
  flex: none;
  visibility: hidden; /* 占位保证对齐 */
}

.lang-menu .is-active {
  color: var(--c-primary);
  font-weight: 600;
}

.lang-menu .is-active .icon {
  visibility: visible;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 999px;
  cursor: pointer;
  color: var(--c-white);
  text-align: center;
  -webkit-appearance: none;
  appearance: none;
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.16);
}

/* 汉堡线条用 SVG：Safari 对 button 内 flex 子项（span 三条杠）渲染不稳定 */
.nav-toggle .bar {
  transition: transform 0.25s, opacity 0.25s;
}

.nav-toggle .b1 { transform-origin: 12px 6.5px; }
.nav-toggle .b2 { transform-origin: 12px 12px; }
.nav-toggle .b3 { transform-origin: 12px 17.5px; }

.nav-toggle[aria-expanded="true"] .b1 {
  transform: translateY(5.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .b2 {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .b3 {
  transform: translateY(-5.5px) rotate(-45deg);
}

@media (max-width: 1079px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    right: 0;
    width: min(320px, 86vw);
    height: calc(100vh - var(--header-h));
    background: var(--c-dark);
    border-left: 1px solid #3a3a3a;
    transform: translateX(100%);
    transition: transform 0.25s ease;
    overflow-y: auto;
    padding: 16px 0;
    visibility: hidden;
  }

  .site-nav.is-open {
    transform: translateX(0);
    visibility: visible;
  }

  .site-nav ul {
    flex-direction: column;
    gap: 0;
  }

  .site-nav a {
    padding: 14px 28px;
    font-size: 16px;
    border-radius: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  /* 抽屉里的联系信息（替代桌面端顶栏） */
  .nav-contacts {
    display: block;
    padding: 20px 28px;
    font-size: 14px;
  }

  .nav-contacts a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    color: rgba(255, 255, 255, 0.75);
    border: 0 !important;
  }

  .nav-contacts .icon {
    width: 15px;
    height: 15px;
    color: var(--c-primary);
    flex: none;
  }
}

@media (min-width: 1080px) {
  .nav-contacts {
    display: none;
  }
}

.nav-overlay {
  position: fixed;
  inset: 0;
  top: var(--header-h);
  z-index: 90;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s;
}

.nav-overlay.is-visible {
  opacity: 1;
  visibility: visible;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 480px;
  padding: 80px 0;
  background-size: cover;
  background-position: center;
}

/* 对照原版：均匀 #222 半透明遮罩（不做渐变） */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(34, 34, 34, 0.5);
}

.hero-inner {
  position: relative;
  max-width: 640px;
}

.hero h1 {
  color: var(--c-white);
  font-size: 40px;
  margin-bottom: 0.4em;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}

.hero p {
  color: rgba(255, 255, 255, 0.82);
  font-size: 17px;
  margin-bottom: 32px;
}

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

@media (max-width: 719px) {
  .hero {
    min-height: 400px;
    padding: 56px 0;
  }

  .hero h1 {
    font-size: 28px;
  }

  .hero p {
    font-size: 15px;
  }

  .hero-actions .btn {
    flex: 1 1 auto;
    justify-content: center;
  }
}

/* ---------- 内页 banner ---------- */
.page-hero {
  position: relative;
  padding: 64px 0;
  background: var(--c-darker);
  background-size: cover;
  background-position: center;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1; /* 遮罩压在背景图上、文字内容之下（.page-hero 的 filter 形成层叠上下文） */
  background: rgba(24, 24, 24, 0.78);
}

.page-hero-inner {
  position: relative;
}

.page-hero h1 {
  color: var(--c-white);
  font-size: 32px;
  margin-bottom: 0.2em;
}

.page-hero p {
  color: rgba(255, 255, 255, 0.72);
  margin: 0;
  max-width: 640px;
}

.page-hero .accent-line {
  display: block;
  width: 56px;
  height: 4px;
  background: var(--c-primary);
  margin-bottom: 18px;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-bottom: 14px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
}

.breadcrumb a:hover {
  color: var(--c-primary);
}

.breadcrumb .sep {
  opacity: 0.5;
}

.breadcrumb .current {
  color: var(--c-primary);
}

@media (max-width: 719px) {
  .page-hero {
    padding: 44px 0;
  }

  .page-hero h1 {
    font-size: 25px;
  }
}

/* ---------- 区块 ---------- */
.section {
  padding: 72px 0;
}

.section-alt {
  background: var(--c-bg-alt);
}

.section-head {
  max-width: 720px;
  margin: 0 auto 44px;
  text-align: center;
}

.section-head .kicker,
.kicker {
  display: inline-block;
  color: var(--c-dark);
  font-weight: 700;
  font-size: 15px;
  padding-bottom: 6px;
  border-bottom: 3px solid var(--c-primary);
  margin-bottom: 8px;
  letter-spacing: 0.04em;
}

.section-head h2 {
  font-size: 30px;
  position: relative;
  padding-bottom: 14px;
  margin-bottom: 14px;
}

.section-head h2::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 44px;
  height: 3px;
  background: var(--c-primary);
}

.section-head p {
  color: var(--c-muted);
  margin: 0;
}

@media (max-width: 719px) {
  .section {
    padding: 48px 0;
  }

  .section-head {
    margin-bottom: 32px;
  }

  .section-head h2 {
    font-size: 23px;
  }
}

/* ---------- 网格与卡片 ---------- */
.grid {
  display: grid;
  gap: 22px;
}

.grid-2 {
  grid-template-columns: 1fr;
}

.grid-3 {
  grid-template-columns: 1fr;
}

.grid-4 {
  grid-template-columns: 1fr;
}

@media (min-width: 720px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1080px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }

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

.icon-card {
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 26px 22px;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.icon-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--c-primary);
}

.icon-card .icon-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--c-primary);
  color: var(--c-white);
  margin-bottom: 16px;
}

.icon-card .icon-badge .icon {
  width: 24px;
  height: 24px;
}

.icon-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.icon-card p {
  color: var(--c-muted);
  font-size: 14.5px;
  margin: 0;
}

/* 图文左右分栏 */
.split {
  display: grid;
  gap: 36px;
  align-items: center;
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .split {
    grid-template-columns: 1fr 1fr;
    gap: 56px;
  }
}

/* 首页关于区块文字列：对齐线上 CSS 精确值（kicker=Roboto Condensed
   1.6rem/400/#222 + 2px #f8c301 下划线 + margin 15%；标题 h3 1.75rem；
   正文 1rem/#7B7B7B/行高 1.5） */
.about-split .kicker {
  font-family: "Roboto Condensed", Sans-serif;
  font-size: 1.6rem;
  font-weight: 400;
  color: #222;
  letter-spacing: normal;
  margin: 0 0 15%;
  padding: 0 0 10px 3px;
  border-bottom: 2px solid #f8c301;
}

.about-split .split-body h2 {
  font-size: 1.75rem;
  font-weight: 700;
  color: #333;
  margin-bottom: 1em;
}

.about-split .split-body p {
  font-size: 1rem;
  line-height: 1.5;
  color: #7b7b7b;
  margin-bottom: 1em;
}

/* 关于页：文字排版对齐线上（标题 40/28px 粗体、正文 20px 灰色大行距） */
.about-page .split-body h2 {
  font-size: 40px;
  font-weight: 700;
  color: #222;
  line-height: 1.25;
}

.about-page .split-body p,
.about-page .mv-card p,
.about-page .vitem p {
  font-size: 20px;
  line-height: 1.9;
  color: #7b7b7b;
  margin-bottom: 1.4em;
}

.about-page .mv-card h3,
.about-page .values-title {
  font-size: 28px;
  font-weight: 700;
  color: #222;
}

.about-page .vitem b {
  font-size: 22px;
  color: #222;
}

/* 关于页公司简介：合成图 + 白框叠加卡（对照线上拼贴） */
.profile-collage {
  position: relative;
}

.profile-collage .collage-card {
  position: absolute;
  right: -6%;
  bottom: 14%;
  width: 52%;
  border: 6px solid var(--c-white);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.22);
}

.split-media img {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  width: 100%;
}

/* ---------- 数字统计 ---------- */
.stats-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px 16px;
  text-align: center;
}

@media (min-width: 720px) {
  .stats-row {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat b {
  display: block;
  font-size: 42px;
  font-weight: 800;
  color: var(--c-primary);
  line-height: 1.1;
}

.stat b .suffix {
  font-size: 24px;
}

.stat > span {
  display: block;
  margin-top: 6px;
  color: var(--c-muted);
  font-size: 14px;
}

.stats-on-dark .stat > span {
  color: rgba(255, 255, 255, 0.65);
}

/* ---------- 产品案例 / 图库 ---------- */
.figure-card {
  margin: 0;
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
}

.figure-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.figure-card img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

.figure-card figcaption {
  padding: 14px 16px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--c-dark);
  text-align: center;
  border-top: 2px solid var(--c-primary);
}

/* ---------- CTA 横幅 ---------- */
.cta-band {
  position: relative;
  padding: 80px 0;
  background-size: cover;
  background-position: center;
}

.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(24, 24, 24, 0.72);
}

.cta-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  flex-wrap: wrap;
}

.cta-inner h2 {
  color: var(--c-white);
  font-size: 28px;
  margin-bottom: 0.3em;
}

.cta-inner p {
  color: rgba(255, 255, 255, 0.75);
  margin: 0;
  max-width: 560px;
}

@media (max-width: 719px) {
  .cta-band {
    padding: 56px 0;
  }

  .cta-inner h2 {
    font-size: 22px;
  }

  .cta-inner .btn {
    width: 100%;
    justify-content: center;
  }
}

/* ---------- 产品卡片 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 32px;
}

.filter-bar .label {
  color: var(--c-muted);
  font-size: 14px;
  margin-right: 4px;
}

.chip {
  padding: 7px 20px;
  font-size: 14px;
  border: 2px solid var(--c-border);
  border-radius: var(--radius);
  background: var(--c-white);
  color: #444;
  transition: 0.15s;
}

.chip:hover {
  border-color: var(--c-dark);
}

.chip.is-active {
  background: var(--c-dark);
  border-color: var(--c-dark);
  color: var(--c-white);
  font-weight: 600;
}

.product-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow 0.2s, border-color 0.2s;
}

.product-card:hover {
  border-color: var(--c-primary);
  box-shadow: var(--shadow);
}

.product-card.is-hot {
  border: 2px solid var(--c-primary);
}

.product-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 1;
  background: var(--c-primary);
  color: var(--c-white);
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 2px;
}

.product-media {
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: #f0f0f0;
}

.product-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}

.product-card:hover .product-media img {
  transform: scale(1.04);
}

.product-body {
  padding: 16px;
  flex: 1;
}

.product-series {
  color: var(--c-primary-dark);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.product-body h3 {
  font-size: 16px;
  margin-bottom: 2px;
}

.product-en {
  color: #aaa;
  font-size: 11.5px;
  margin-bottom: 12px;
}

.product-specs {
  border-top: 1px solid #f0f0f0;
  padding-top: 10px;
  font-size: 12.5px;
  color: #555;
}

.product-specs .row {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 4px;
}

.product-specs .row b {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  color: var(--c-dark);
}

.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 12px;
}

.product-tags span {
  font-size: 11px;
  padding: 2px 8px;
  background: #fdf6dd;
  color: #8a6d00;
  border: 1px solid #f0e2a8;
  border-radius: 2px;
}

.product-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-top: 1px solid #f0f0f0;
  font-size: 13px;
}

.product-foot .more {
  color: var(--c-primary-dark);
  font-weight: 600;
}

.product-foot .cat {
  color: #bbb;
}

/* ---------- 产品详情页 ---------- */
.pd-layout {
  display: grid;
  gap: 40px;
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .pd-layout {
    grid-template-columns: 5fr 4fr;
    align-items: start;
  }
}

.key-specs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

@media (min-width: 600px) {
  .key-specs {
    grid-template-columns: repeat(3, 1fr);
  }
}

.key-spec {
  background: var(--c-bg-alt);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 14px;
}

.key-spec span {
  display: block;
  font-size: 12.5px;
  color: var(--c-muted);
  margin-bottom: 4px;
}

.key-spec b {
  font-size: 15.5px;
  color: var(--c-dark);
}

.check-list li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 10px;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--c-primary);
  -webkit-mask: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor"><path d="M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4L9 16.2z"/></svg>')
    center / 12px no-repeat;
  mask: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor"><path d="M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4L9 16.2z"/></svg>')
    center / 12px no-repeat;
}

.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.pill-list li {
  padding: 8px 18px;
  background: var(--c-bg-alt);
  border: 1px solid var(--c-border);
  border-radius: 999px;
  font-size: 14px;
}

/* ---------- 参数表（移动端横向滚动） ---------- */
.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
}

.table-note {
  font-size: 12.5px;
  color: var(--c-muted);
  margin-top: 10px;
}

.param-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px; /* 低于此宽度出横向滚动条，而不是压碎布局 */
  font-size: 13px;
}

.param-table th {
  background: var(--c-dark);
  color: var(--c-white);
  border: 1px solid #3a3a3a;
  padding: 9px 12px;
  font-weight: 500;
  text-align: center;
  white-space: nowrap;
}

.param-table td {
  border: 1px solid var(--c-border);
  padding: 7px 12px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 12.5px;
  white-space: nowrap;
}

.param-table tbody tr:nth-child(even) td {
  background: #fbfbfb;
}

.param-table tbody tr:hover td {
  background: #fdf6dd;
}

.param-table td:first-child,
.param-table th:first-child {
  font-family: var(--font-sans);
  text-align: left;
  font-weight: 500;
  color: var(--c-dark);
  background: var(--c-bg-alt);
  position: sticky;
  left: 0; /* 横向滚动时首列固定 */
  z-index: 1;
}

.kv-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  min-width: 0;
}

.kv-table th,
.kv-table td {
  border: 1px solid var(--c-border);
  padding: 10px 14px;
  text-align: left;
}

.kv-table th {
  width: 38%;
  background: var(--c-bg-alt);
  color: var(--c-dark);
  font-weight: 500;
}

.kv-table td {
  font-family: var(--font-mono);
  font-size: 13px;
}

/* ---------- 步骤 ---------- */
.steps {
  counter-reset: step;
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
}

@media (min-width: 720px) {
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (min-width: 1080px) {
  .steps {
    grid-template-columns: repeat(5, 1fr);
  }
}

.step {
  counter-increment: step;
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 22px 20px;
  position: relative;
}

.step::before {
  content: counter(step, decimal-leading-zero);
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  color: var(--c-primary);
  margin-bottom: 10px;
}

.step h3 {
  font-size: 15.5px;
  margin-bottom: 6px;
}

.step p {
  font-size: 13.5px;
  color: var(--c-muted);
  margin: 0;
}

/* ---------- 评价 ---------- */
.quote-card {
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
}

.quote-card .mark {
  font-size: 44px;
  line-height: 1;
  color: var(--c-primary);
  font-family: Georgia, serif;
  margin-bottom: 8px;
}

.quote-card blockquote {
  margin: 0 0 18px;
  font-size: 14.5px;
  color: #555;
  flex: 1;
}

.quote-card cite {
  font-style: normal;
  font-weight: 600;
  color: var(--c-dark);
  font-size: 14px;
}

.quote-card cite span {
  display: block;
  font-weight: 400;
  color: var(--c-muted);
  font-size: 12.5px;
  margin-top: 2px;
}

/* ---------- 询价条 ---------- */
.inquiry-strip {
  background: var(--c-dark);
  color: var(--c-white);
  border-radius: var(--radius);
  padding: 30px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.inquiry-strip h3 {
  color: var(--c-white);
  margin: 0 0 8px;
  font-size: 19px;
}

.inquiry-strip ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
}

.inquiry-strip ul a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.inquiry-strip ul a:hover {
  color: var(--c-primary);
}

.inquiry-strip .icon {
  width: 15px;
  height: 15px;
  color: var(--c-primary);
}

/* ---------- 表单 ---------- */
.form-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
}

@media (min-width: 720px) {
  .form-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .form-grid .full {
    grid-column: 1 / -1;
  }
}

.field label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--c-dark);
  margin-bottom: 6px;
}

.field label .req {
  color: #d43b1f;
}

.field input,
.field textarea {
  width: 100%;
  padding: 12px 14px;
  font: inherit;
  font-size: 15px;
  color: var(--c-text);
  background: var(--c-white);
  border: 1px solid #ccc;
  border-radius: var(--radius);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(248, 195, 1, 0.2);
}

.field textarea {
  min-height: 140px;
  resize: vertical;
}

/* ---------- 联系卡 ---------- */
.contact-card {
  display: flex;
  gap: 16px;
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 22px;
}

.contact-card .icon-badge {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: var(--radius);
  background: var(--c-primary);
  color: var(--c-white);
}

.contact-card .icon-badge .icon {
  width: 22px;
  height: 22px;
}

.contact-card h3 {
  font-size: 15.5px;
  margin-bottom: 4px;
}

.contact-card p {
  margin: 0;
  font-size: 14px;
  color: var(--c-muted);
}

.contact-card a {
  color: var(--c-dark);
  font-weight: 500;
}

.contact-card a:hover {
  color: var(--c-primary-dark);
}

.qr-figure {
  text-align: center;
  margin: 0;
}

.qr-figure img {
  width: 100%;
  max-width: 188px; /* 源图 188×110，超出原生尺寸会放大失真 */
  height: auto;
  margin: 0 auto;
  border-radius: 6px;
}

.qr-figure figcaption {
  font-size: 13px;
  color: var(--c-muted);
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--c-dark);
  color: rgba(255, 255, 255, 0.72);
  font-size: 14.5px;
}

.footer-grid {
  display: grid;
  gap: 36px;
  padding: 56px 0 40px;
  grid-template-columns: 1fr;
}

@media (min-width: 720px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1080px) {
  .footer-grid {
    grid-template-columns: 4fr 3fr 5fr;
  }
}

.site-footer h4 {
  color: var(--c-white);
  font-size: 16px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  position: relative;
}

.site-footer h4::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 32px;
  height: 3px;
  background: var(--c-primary);
}

.footer-links li {
  margin-bottom: 9px;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--c-primary);
}

.footer-links .icon {
  width: 13px;
  height: 13px;
  color: var(--c-primary);
}

.footer-brand > img {
  height: 52px;
  width: auto;
  margin-bottom: 16px;
}

.footer-brand p {
  margin-bottom: 18px;
  max-width: 380px;
}

.footer-contacts li {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
}

.footer-contacts .icon {
  flex: none;
  width: 15px;
  height: 15px;
  margin-top: 5px;
  color: var(--c-primary);
}

.footer-contacts a:hover {
  color: var(--c-primary);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 18px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

/* ---------- 提示框 ---------- */
.notice {
  background: #fdf6dd;
  border: 1px solid #f0e2a8;
  border-left: 4px solid var(--c-primary);
  border-radius: var(--radius);
  padding: 20px 22px;
}

.notice h3 {
  font-size: 15.5px;
  margin-bottom: 10px;
}

.notice .check-list {
  grid-column: 1 / -1;
}

@media (min-width: 720px) {
  .notice .check-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0 28px;
  }
}

/* ---------- 杂项 ---------- */
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

.text-center { text-align: center; }

.icon {
  display: inline-block;
  vertical-align: middle;
  fill: currentColor;
}

/* 滚动渐显 */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

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

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

/* 无 JS 时兜底：内容直接可见 */
.no-js .reveal {
  opacity: 1;
  transform: none;
}

/* 表单提交状态提示（main.js 动态插入） */
.form-status {
  margin: 14px 0 0;
  font-size: 14px;
  font-weight: 500;
}

/* ============================================================
   产品频道设计层（对照原版 0821 设计：红色强调 #d43b1f）
   ============================================================ */
:root {
  --c-accent-red: #d43b1f;
  --c-accent-red-dark: #aa2e15;
  --c-red-tint: #fdf2f0;
  --c-red-border: #f5d5ce;
  --c-red-tint-row: #fef8f8;
}

/* ---------- 产品列表 hero ---------- */
.pd-hero {
  position: relative;
  overflow: hidden;
  min-height: 360px;
}

.pd-hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
}

.pd-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(15,15,15,0.88) 0%, rgba(15,15,15,0.72) 55%, rgba(15,15,15,0.35) 100%);
}

.pd-hero-content {
  position: relative;
  z-index: 1;
  padding: 64px 24px;
}

.pd-hero h1 {
  color: var(--c-white);
  font-size: 38px;
  font-weight: 700;
  line-height: 1.25;
  margin: 0 0 12px;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}

.pd-hero p {
  color: rgba(255, 255, 255, 0.75);
  margin: 0;
  font-size: 15px;
  max-width: 480px;
}

.pd-hero-line {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--c-accent-red);
  z-index: 1;
}

.pd-hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.pd-stat {
  border-left: 3px solid var(--c-accent-red);
  padding-left: 14px;
}

.pd-stat b {
  color: var(--c-white);
  font-size: 30px;
  font-weight: 800;
  line-height: 1;
  display: block;
  font-family: var(--font-mono);
}

.pd-stat span {
  color: rgba(255, 255, 255, 0.6);
  font-size: 13px;
  margin-top: 4px;
  display: block;
}

.pd-hero-cta {
  display: flex;
  align-items: center;
  margin-top: 32px;
}

/* 与首页按钮一致：黄底白字、方角、hover 黑底 */
.btn-quote {
  display: inline-block;
  background: var(--c-primary);
  color: var(--c-white) !important;
  padding: 15px 35px;
  border-radius: 0;
  font-weight: 500;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
  transition: 0.2s;
}

.btn-quote:hover {
  background: var(--c-dark);
  color: var(--c-white);
}

@media (max-width: 719px) {
  .pd-hero {
    min-height: 300px;
  }

  .pd-hero h1 {
    font-size: 28px;
  }

  .pd-hero-stats {
    gap: 24px;
  }

  .pd-stat b {
    font-size: 24px;
  }
}

/* ---------- 产品列表主体 ---------- */
.pd-main {
  padding: 40px 0 64px;
}

.pd-filters {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.pd-filter-label {
  color: #666;
  font-size: 14px;
  margin-right: 4px;
}

.pd-chip {
  padding: 6px 20px;
  border-radius: 2px;
  font-size: 14px;
  border: 2px solid var(--c-primary);
  background: var(--c-primary);
  color: #1a1a1a;
  cursor: pointer;
  transition: 0.15s;
  font-family: inherit;
}

.pd-chip.active {
  border: 2px solid #000;
  background: #000;
  color: var(--c-white);
  font-weight: 600;
}

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

@media (max-width: 1280px) {
  .pd-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 960px) {
  .pd-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.pd-card {
  border: 1px solid #e0e0e0;
  border-radius: 4px;
  overflow: hidden;
  cursor: pointer;
  transition: 0.2s;
  background: var(--c-white);
  position: relative;
  display: block;
  text-decoration: none;
  color: inherit;
}

.pd-card:hover {
  border-color: var(--c-accent-red);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.pd-card.is-hot {
  border: 2px solid var(--c-accent-red);
}

.pd-card-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 1;
  background: var(--c-accent-red);
  color: var(--c-white);
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 2px;
}

.pd-card-img {
  height: 190px;
  background: #f0f0f0;
  overflow: hidden;
}

.pd-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 0.3s;
}

.pd-card:hover .pd-card-img img {
  transform: scale(1.04);
}

.pd-card-body {
  padding: 14px 16px;
}

.pd-card-series {
  color: var(--c-accent-red);
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 4px;
  letter-spacing: 0.04em;
}

.pd-card-name {
  font-size: 15px;
  font-weight: 700;
  color: #1a1a1a;
  line-height: 1.3;
  margin-bottom: 4px;
}

.pd-card-en {
  color: #aaa;
  font-size: 11px;
  margin-bottom: 10px;
}

.pd-card-spec {
  border-top: 1px solid #f0f0f0;
  padding-top: 10px;
}

.pd-card-spec .row {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: #555;
  margin-bottom: 4px;
}

.pd-card-spec .row b {
  font-family: var(--font-mono);
  color: #333;
  font-size: 11px;
  font-weight: 500;
}

.pd-card-tags {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.pd-card-tags span {
  font-size: 11px;
  padding: 2px 6px;
  background: var(--c-red-tint);
  color: var(--c-accent-red);
  border-radius: 2px;
  border: 1px solid var(--c-red-border);
}

.pd-card-foot {
  padding: 10px 16px;
  border-top: 1px solid #f0f0f0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.pd-card-foot .more {
  color: var(--c-accent-red);
  font-size: 13px;
  font-weight: 600;
}

.pd-card-foot .cat {
  font-size: 12px;
  color: #bbb;
}

/* 定制解决方案 CTA（红渐变） */
.pd-cta {
  position: relative;
  border-radius: 4px;
  overflow: hidden;
  margin-top: 52px;
}

.pd-cta-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 60%;
  filter: brightness(0.35) saturate(0.6);
}

.pd-cta-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(170, 46, 21, 0.87) 0%, rgba(212, 59, 31, 0.67) 100%);
}

.pd-cta-body {
  position: relative;
  z-index: 1;
  padding: 44px 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.pd-cta-body h3 {
  color: var(--c-white) !important;
  font-size: 24px;
  font-weight: 700;
}

.pd-cta-body p {
  color: rgba(255, 255, 255, 0.8);
  margin: 8px 0 0;
  font-size: 14px;
  max-width: 500px;
  line-height: 1.7;
}

@media (max-width: 640px) {
  .pd-cta-body {
    padding: 32px 24px;
  }
}

/* ---------- 产品详情页 ---------- */
.crumb-bar {
  background: #f5f5f5;
  border-bottom: 1px solid #eee;
}

.crumb-bar-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 13px 20px;
  font-size: 13px;
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.crumb-bar a {
  color: var(--c-accent-red);
}

.crumb-bar .sep {
  color: #bbb;
}

.crumb-bar .current {
  color: #333;
}

.pd-detail {
  display: flex;
  gap: 32px;
  align-items: flex-start;
  /* 该元素同时带 .container，不可覆盖左右内边距 */
  padding: 40px 20px 64px;
}

.pd-detail-main {
  flex: 1;
  min-width: 0;
}

.pd-detail-side {
  width: 320px;
  flex-shrink: 0;
  position: sticky;
  top: calc(var(--header-h) + 16px);
}

/* 联系页表单卡加宽版 */
.pd-detail-side.wide {
  width: 460px;
}

@media (max-width: 960px) {
  .pd-detail {
    flex-direction: column;
  }

  .pd-detail-side,
  .pd-detail-side.wide {
    width: 100%;
    position: static;
  }
}

.pd-series-badge {
  display: inline-block;
  background: var(--c-accent-red);
  color: var(--c-white);
  font-size: 12px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 2px;
  margin-right: 8px;
}

.pd-cat {
  color: #999;
  font-size: 13px;
}

.pd-detail-main h1 {
  font-size: 28px;
  margin: 10px 0 4px;
}

.pd-en-name {
  color: #999;
  font-size: 14px;
  margin-bottom: 18px;
}

.pd-intro {
  border-left: 3px solid var(--c-accent-red);
  padding: 2px 0 2px 14px;
  color: #444;
  margin-bottom: 24px;
}

.pd-key-specs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

@media (max-width: 720px) {
  .pd-key-specs {
    grid-template-columns: repeat(2, 1fr);
  }
}

.pd-key-spec {
  background: #f7f7f7;
  border-radius: 3px;
  padding: 12px 14px;
}

.pd-key-spec span {
  display: block;
  font-size: 12px;
  color: #888;
  margin-bottom: 4px;
}

.pd-key-spec b {
  font-family: var(--font-mono);
  font-size: 15px;
  color: #1a1a1a;
  font-weight: 600;
}

.pd-block-title {
  border-left: 3px solid var(--c-accent-red);
  padding-left: 10px;
  font-size: 17px;
  font-weight: 700;
  color: #1a1a1a;
  margin: 28px 0 14px;
}

.pd-feature-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px 24px;
  padding-left: 0;
  list-style: none;
}

@media (max-width: 720px) {
  .pd-feature-list {
    grid-template-columns: 1fr;
  }
}

.pd-feature-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: #444;
}

.pd-feature-list li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--c-accent-red);
}

.pd-app-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-left: 0;
  list-style: none;
}

.pd-app-pills li {
  border: 1px solid #ddd;
  background: #fafafa;
  border-radius: 3px;
  padding: 8px 18px;
  font-size: 13.5px;
  color: #444;
}

/* 右侧报价卡 */
.quote-card-red {
  border: 1px solid #eee;
  border-radius: 6px;
  overflow: hidden;
  background: var(--c-white);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.quote-card-red-head {
  background: var(--c-accent-red);
  color: var(--c-white);
  padding: 18px 20px;
}

.quote-card-red-head h3 {
  color: var(--c-white);
  font-size: 18px;
  margin: 0;
}

.quote-card-red-head p {
  margin: 4px 0 0;
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.85);
}

.quote-card-red-body {
  padding: 18px 20px 20px;
}

.quote-card-red-body .qrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  color: #444;
  margin-bottom: 12px;
}

.quote-card-red-body .qrow .icon {
  width: 15px;
  height: 15px;
  color: var(--c-accent-red);
  flex: none;
}

.quote-card-red-body .qrow a:hover {
  color: var(--c-accent-red);
}

.btn-inquire {
  display: block;
  width: 100%;
  text-align: center;
  background: var(--c-accent-red);
  color: var(--c-white) !important;
  padding: 13px 0;
  border-radius: 3px;
  font-weight: 600;
  font-size: 15px;
  transition: 0.2s;
}

.btn-inquire:hover {
  background: var(--c-accent-red-dark);
}

.btn-manual {
  display: block;
  width: 100%;
  text-align: center;
  background: var(--c-white);
  color: var(--c-accent-red) !important;
  border: 1px solid var(--c-accent-red);
  padding: 12px 0;
  border-radius: 3px;
  font-weight: 600;
  font-size: 14px;
  margin-top: 10px;
  transition: 0.2s;
}

.btn-manual:hover {
  background: var(--c-red-tint);
}

.pd-certs {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid #f0f0f0;
}

.pd-certs span {
  display: inline-block;
  border: 1px solid var(--c-accent-red);
  color: var(--c-accent-red);
  font-size: 11.5px;
  padding: 2px 8px;
  border-radius: 2px;
  margin: 0 6px 6px 0;
  font-family: var(--font-mono);
}

/* Tabs */
.pd-tabs {
  margin-top: 40px;
}

.pd-tab-bar {
  display: flex;
  gap: 32px;
  border-bottom: 1px solid #e5e5e5;
  padding: 0 20px;
  list-style: none;
  margin: 0 0 24px;
}

.pd-tab-bar button {
  background: none;
  border: none;
  font: inherit;
  font-size: 15px;
  color: #666;
  padding: 12px 2px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}

.pd-tab-bar button.active {
  color: var(--c-accent-red);
  font-weight: 700;
  border-bottom-color: var(--c-accent-red);
}

.pd-tab-pane {
  display: none;
}

.pd-tab-pane.active {
  display: block;
}

.no-js .pd-tab-pane {
  display: block;
}

/* 图纸富文本里上传的图片：不超出详情栏宽度 */
.pd-tab-pane img {
  max-width: 100%;
  height: auto;
}

/* 窄屏下标签过长：缩短间距并允许横向滑动，避免溢出屏幕 */
@media (max-width: 480px) {
  .pd-tab-bar {
    gap: 16px;
    padding: 0 10px;
    overflow-x: auto;
  }

  .pd-tab-bar button {
    font-size: 14px;
    white-space: nowrap;
  }
}

/* 参数表（红头，对照原版） */
.table-caption {
  border-left: 3px solid var(--c-accent-red);
  padding-left: 10px;
  font-weight: 700;
  color: #1a1a1a;
  margin: 0 0 14px;
  font-size: 14.5px;
}

.param-table th {
  background: var(--c-accent-red);
  border-color: var(--c-accent-red-dark);
}

.param-table td:first-child,
.param-table th:first-child {
  background: #f5f5f5;
}

.param-table tbody tr:nth-child(even) td {
  background: var(--c-red-tint-row);
}

.param-table tbody tr:hover td {
  background: #fdeaea;
}

/* 选型步骤（红色数字，五列） */
.pd-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
  counter-reset: pdstep;
  padding-left: 0;
  list-style: none;
}

@media (max-width: 1080px) {
  .pd-steps {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.pd-steps li {
  counter-increment: pdstep;
  background: #fafafa;
  border: 1px solid #eee;
  border-radius: 4px;
  padding: 16px;
  position: relative;
}

.pd-steps li::before {
  content: counter(pdstep, decimal-leading-zero);
  display: block;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--c-accent-red);
  margin-bottom: 6px;
}

.pd-steps li b {
  display: block;
  font-size: 14.5px;
  color: #1a1a1a;
  margin-bottom: 4px;
}

.pd-steps li p {
  font-size: 13px;
  color: #777;
  margin: 0;
}

/* 常见应用场合 */
.pd-app-rows {
  border-top: 1px solid var(--c-border);
}

.pd-app-rows .arow {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 24px;
  padding: 12px 4px;
  border-bottom: 1px solid var(--c-border);
  font-size: 14px;
  align-items: baseline;
}

.pd-app-rows .arow b {
  color: #1a1a1a;
  font-weight: 600;
}

.pd-app-rows .arow .tq {
  font-family: var(--font-mono);
  color: var(--c-accent-red);
  font-size: 12.5px;
}

.pd-app-rows .arow .note {
  color: #999;
  font-size: 12.5px;
}

@media (max-width: 640px) {
  .pd-app-rows .arow {
    grid-template-columns: 1fr auto;
  }

  .pd-app-rows .arow .note {
    display: none;
  }
}

/* 注意事项 */
.pd-notice {
  background: #fffdf5;
  border: 1px solid #f0e2a8;
  border-radius: 4px;
  padding: 18px 22px;
}

.pd-notice h3 {
  font-size: 15px;
  margin: 0 0 10px;
  color: #8a6d00;
}

.pd-notice ul {
  margin: 0;
  padding-left: 0;
  list-style: none;
}

.pd-notice li {
  position: relative;
  padding-left: 24px;
  font-size: 13.5px;
  color: #666;
  margin-bottom: 8px;
}

.pd-notice li::before {
  content: "⚠";
  position: absolute;
  left: 0;
  color: var(--c-primary-dark);
}

/* 相关产品 */
.pd-related {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

@media (max-width: 1080px) {
  .pd-related {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

/* 结构图纸示意 */
.pd-diagram {
  background: #fafafa;
  border: 1px solid #eee;
  border-radius: 4px;
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  white-space: pre;
  overflow-x: auto;
  color: #444;
  line-height: 1.8;
}

/* 首页 hero 居中版（对照原版） */
.hero-center {
  text-align: center;
  min-height: 560px;
}

.hero-center .hero-inner {
  max-width: none;
}

.hero-center .hero-actions {
  justify-content: center;
}

/* CTA 右侧三图 */
.cta-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  max-width: 460px;
}

.cta-gallery img {
  width: 100%;
  height: 100px;
  object-fit: cover;
  border: 2px solid rgba(255, 255, 255, 0.6);
  border-radius: 3px;
}

@media (max-width: 719px) {
  .cta-gallery img {
    height: 72px;
  }
}

/* ---------- 计数白卡上浮（对照原版首页/关于页底部） ---------- */
.cta-overlap-pad {
  padding-bottom: 170px;
}

.stats-overlap {
  position: relative;
  z-index: 2;
  margin-top: -120px;
  padding-bottom: 48px;
}

.stats-card {
  position: relative;
  background: var(--c-white);
  border: 2px solid var(--c-primary);
  padding: 44px 48px;
  display: grid;
  grid-template-columns: 1fr 1fr 2.4fr;
  gap: 28px;
  align-items: center;
}

.stats-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url('/site/images/stats-pattern.png') repeat;
  background-size: 520px;
  opacity: 0.05;
  pointer-events: none;
}

.stats-card > * {
  position: relative;
}

.stats-card .stat b {
  color: var(--c-primary);
  font-size: 54px;
  font-weight: 800;
}

.stats-card .stat > span {
  color: var(--c-dark);
  font-size: 15px;
  margin-top: 4px;
}

.stats-slogan {
  display: flex;
  align-items: center;
  gap: 28px;
}

.stats-slogan h3 {
  font-size: 24px;
  margin: 0;
  flex: 1;
}

.stats-slogan .line {
  width: 150px;
  height: 2px;
  background: #2f9bd6;
  flex: none;
}

@media (max-width: 960px) {
  .stats-overlap {
    margin-top: -70px;
    padding-bottom: 32px;
  }

  .stats-card {
    grid-template-columns: 1fr;
    padding: 32px 24px;
  }

  .stats-slogan h3 {
    font-size: 19px;
  }
}

/* ============================================================
   内页组件层（对照原版 0821：服务/关于/联系）
   ============================================================ */

/* 内页 banner：对齐线上配方——深色底 + 图层 20% 不透明度去色铺底（视图经
   --hero-img 传入图片 URL），标题白色居中。
   isolation 形成层叠上下文：::before 图层(z-index:-1) 位于深色底之上、文字之下 */
.page-hero {
  position: relative;
  isolation: isolate;
  background-color: var(--c-darker);
  min-height: 50vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 64px 0;
  text-align: center;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image: var(--hero-img, none);
  background-size: cover;
  background-position: center center;
  opacity: 0.2;
  filter: saturate(0);
}

.page-hero h1 {
  color: var(--c-white);
  font-size: 42px;
  font-weight: 700;
  margin: 0;
}

.page-hero p,
.page-hero .accent-line,
.page-hero .breadcrumb {
  display: none;
}

@media (max-width: 719px) {
  .page-hero {
    padding: 64px 0;
  }

  .page-hero h1 {
    font-size: 30px;
  }
}

/* 服务卡（白卡黄顶线 + 黄圆图标徽章，对照原版服务区） */
.svc-card {
  position: relative;
  background: var(--c-white);
  border: 1px solid #f0e2a8;
  border-top: 3px solid var(--c-primary);
  padding: 30px 24px 24px;
  text-align: center;
}

.svc-card .icon-badge {
  position: absolute;
  top: -26px;
  left: 50%;
  transform: translateX(-50%);
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--c-primary);
  color: var(--c-white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 5px var(--c-white);
}

.svc-card .icon-badge .icon {
  width: 22px;
  height: 22px;
}

.svc-card h3 {
  font-size: 16.5px;
  margin: 6px 0 8px;
}

.svc-card p {
  color: var(--c-muted);
  font-size: 14px;
  margin: 0;
}

.svc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px 26px;
}

@media (max-width: 1080px) {
  .svc-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

/* 编号块（01-04，交替顶线 + 黄圆数字徽章，对照原版核心优势区） */
.num-card {
  position: relative;
  background: var(--c-white);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  padding: 40px 26px 24px;
  margin-top: 34px;
}

.num-card::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  right: 0;
  height: 2px;
}

.num-card.line-gold::before { background: var(--c-primary); }
.num-card.line-dark::before { background: var(--c-dark); }

.num-card .num-badge {
  position: absolute;
  top: -30px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--c-primary);
  color: var(--c-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
}

.num-card h3 {
  font-size: 19px;
  margin: 8px 0 12px;
  text-align: center;
}

.num-card p {
  font-size: 14px;
  color: #555;
  margin: 0;
}

.num-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px 26px;
  counter-reset: num;
}

@media (max-width: 720px) {
  .num-grid {
    grid-template-columns: 1fr;
  }
}

/* 侧栏：为什么选择我们（标题 + 计数） */
.why-side .kicker {
  display: inline-block;
}

.why-side h2 {
  font-size: 30px;
}

.why-counter {
  margin-top: 40px;
}

.why-counter .num {
  font-family: var(--font-mono);
  font-size: 64px;
  font-weight: 700;
  color: var(--c-dark);
  line-height: 1;
}

.why-counter .plus {
  font-size: 40px;
  color: var(--c-primary);
  font-weight: 700;
}

.why-counter span {
  display: block;
  color: var(--c-muted);
  margin-top: 6px;
}

/* 评价卡（黄边框，对照原版） */
.quote-yellow {
  background: var(--c-white);
  border: 2px solid var(--c-primary);
  padding: 30px 28px 24px;
  display: flex;
  flex-direction: column;
}

.quote-yellow p {
  font-size: 15px;
  color: #444;
  margin: 0 0 20px;
  flex: 1;
}

.quote-yellow b {
  color: var(--c-dark);
  font-size: 16px;
}

.quote-yellow span {
  display: block;
  color: var(--c-primary-dark);
  font-size: 13px;
  margin-top: 2px;
}

/* 区块头右侧按钮（对照原版评价区） */
.sec-head-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.sec-head-row .section-head {
  margin: 0;
  text-align: left;
}

.sec-head-row .section-head h2::after {
  left: 0;
  transform: none;
}

.sec-divider {
  flex: 1;
  min-width: 160px;
  height: 2px;
  background: #2f9bd6;
  align-self: center;
  order: 2;
}

.sec-head-row .btn { order: 3; }

/* 联系页：大标题式联系块 */
.contact-block {
  border-bottom: 1px solid var(--c-border);
  padding: 26px 0;
}

.contact-block:first-of-type {
  padding-top: 0;
}

.contact-block h3 {
  font-size: 30px;
  margin: 0 0 10px;
}

.contact-block a,
.contact-block .val {
  color: var(--c-primary-dark);
  font-size: 15px;
  display: inline-block;
  margin-right: 18px;
}

.contact-block a:hover {
  color: var(--c-primary);
  text-decoration: underline;
}

.contact-intro {
  border-bottom: 1px solid var(--c-border);
  padding-bottom: 20px;
  margin-bottom: 0;
  color: var(--c-muted);
}

/* 联系页表单白卡 */
.form-card2 {
  background: var(--c-white);
  border: 1px solid #e5e5e5;
  border-radius: 10px;
  padding: 34px 30px;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.05);
}

.form-card2 .field input,
.form-card2 .field textarea {
  border-radius: 6px;
}

.form-card2 .btn {
  width: 100%;
  justify-content: center;
  background: var(--c-primary);
  color: var(--c-white);
  border-radius: 4px;
}

.form-card2 .btn:hover {
  background: var(--c-primary-dark);
}

/* 关于页：使命/愿景/价值观黄描边卡 */
.mv-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px 26px;
}

@media (max-width: 720px) {
  .mv-grid {
    grid-template-columns: 1fr;
  }
}

.mv-card {
  position: relative;
  background: var(--c-white);
  border: 2px solid var(--c-primary);
  padding: 40px 28px 26px;
  margin-top: 30px;
}

.mv-card .icon-badge {
  position: absolute;
  top: -26px;
  left: 50%;
  transform: translateX(-50%);
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--c-primary);
  color: var(--c-white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 5px var(--c-white);
}

.mv-card .icon-badge .icon {
  width: 22px;
  height: 22px;
}

.mv-card h3 {
  font-size: 20px;
  margin: 4px 0 10px;
}

.mv-card p {
  color: #555;
  font-size: 14.5px;
  margin: 0;
}

.values-card {
  position: relative;
  background: var(--c-white);
  border: 2px solid var(--c-primary);
  padding: 46px 40px 34px;
  margin-top: 34px;
  text-align: center;
}

.values-card > .icon-badge {
  position: absolute;
  top: -26px;
  left: 50%;
  transform: translateX(-50%);
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--c-primary);
  color: var(--c-white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 5px var(--c-white);
}

.values-card > .icon-badge .icon {
  width: 22px;
  height: 22px;
}

.values-card .values-title {
  font-size: 22px;
  border-bottom: 1px solid var(--c-border);
  padding-bottom: 14px;
  margin-bottom: 28px;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px 40px;
  text-align: left;
}

@media (max-width: 720px) {
  .values-grid {
    grid-template-columns: 1fr;
  }
}

.values-grid .vitem .vicon {
  width: 30px;
  height: 30px;
  border: 3px solid var(--c-primary);
  border-radius: 4px;
  margin-bottom: 12px;
  color: var(--c-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.values-grid .vitem .vicon .icon {
  width: 100%;
  height: 100%;
  padding: 1px;
}

.values-grid .vitem b {
  display: block;
  font-size: 17px;
  color: var(--c-dark);
  margin-bottom: 6px;
}

.values-grid .vitem p {
  color: #555;
  font-size: 14px;
  margin: 0;
}

/* ---------- 产品案例页 ---------- */
.case-prose p {
  color: #444;
  line-height: 1.8;
  margin: 0 0 14px;
}

.case-prose {
  max-width: 860px;
}

.case-outcomes {
  margin-top: 20px;
}

.case-pager {
  display: flex;
  gap: 16px;
  margin-top: 48px;
}

.case-pager a {
  flex: 1;
  padding: 16px 18px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  background: var(--c-white);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.case-pager a:hover {
  border-color: var(--c-primary);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
}

.case-pager .dir {
  display: block;
  font-size: 12px;
  color: var(--c-muted);
  margin-bottom: 6px;
}

.case-pager .t {
  font-weight: 600;
  color: var(--c-dark);
  font-size: 15px;
}

.case-pager .next {
  text-align: right;
}

@media (max-width: 640px) {
  .case-pager {
    flex-direction: column;
  }

  .case-pager .next {
    text-align: left;
  }
}