/* ============================================================
   CDB 全站样式 · 按施工图 E 节逐条实现(色板/字体/组件/断点/无障碍)
   ============================================================ */

:root {
  --color-primary: #4a3b52;
  --color-primary-hover: #3a2d41;
  --color-accent: #c9736b;
  --color-accent-hover: #b0625b;
  --color-base: #ffffff;
  --color-soft: #faf6f3;
  --color-border: #e5ddd8;
  --color-body: #2e2a2c;
  --color-muted: #6b6266;
  --color-whatsapp: #25d366;
  --font-heading: "Instrument Sans", "Segoe UI", system-ui, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --container-max: 1200px;
  --section-pad: 72px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-body);
  background: var(--color-base);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  color: var(--color-accent);
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--color-primary);
  font-weight: 700;
}

h1 {
  font-size: 38px;
}

h2 {
  font-size: 28px;
  margin-bottom: 24px;
}

h3 {
  font-size: 19px;
  font-weight: 600;
}

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

.section {
  padding: var(--section-pad) 0;
}

.alt-section {
  background: var(--color-soft);
}

/* ---- 无障碍: Skip link ---- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1000;
  background: var(--color-primary);
  color: #fff;
  padding: 10px 16px;
  border-radius: 0 0 8px 0;
}

.skip-link:focus {
  left: 0;
}

/* ---- 手机顶部信息条(<=560px, 施工图 C8) ---- */
.topbar {
  display: none;
  background: var(--color-primary);
  color: #fff;
  font-size: 13px;
  line-height: 1.5;
  padding: 8px 16px;
}

.topbar p {
  margin: 0;
}

@media (max-width: 560px) {
  .topbar {
    display: block;
  }
}

/* ---- 页头 ---- */
.site-header {
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-base);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 24px;
}

.wordmark {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.wordmark:hover {
  color: var(--color-primary);
}

.site-nav {
  display: flex;
  gap: 28px;
}

.site-nav a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-body);
  padding: 6px 0;
}

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

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  cursor: pointer;
  width: 40px;
  height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  border-radius: 8px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--color-base);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    gap: 0;
    padding: 8px 20px 16px;
    box-shadow: 0 12px 20px rgba(0, 0, 0, 0.06);
  }

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

  .site-nav a {
    padding: 12px 0;
    border-bottom: 1px solid var(--color-soft);
  }

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

/* ---- Hero ---- */
.hero {
  background: var(--color-soft);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
  padding-top: 64px;
  padding-bottom: 56px;
}

.hero-copy {
  animation: fade-up 0.5s ease both;
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.hero-sub {
  font-size: 18px;
  color: var(--color-muted);
  margin: 20px 0 28px;
}

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

.hero-media {
  background: var(--color-base);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 20px;
}

.hero-media img {
  width: 100%;
  height: auto;
  object-fit: contain;
  aspect-ratio: 4 / 5;
  background: var(--color-soft);
  border-radius: 10px;
}

/* 硬数据条 */
.hero-strip {
  background: var(--color-primary);
  color: #fff;
  padding: 22px 0 20px;
}

.hero-strip-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 28px;
}

.hero-strip-list li {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-strip-list li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  flex: none;
}

.hero-strip-note {
  font-size: 13px;
  color: #d8cfd4;
  margin-top: 10px;
}

/* ---- 卡片 ---- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

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

.product-card {
  border: 1px solid var(--color-border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--color-base);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  transition: border-color 0.18s ease, transform 0.18s ease;
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.product-card-media {
  display: block;
  background: var(--color-soft);
  padding: 14px;
}

.product-card-media img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: contain;
  background: var(--color-soft);
  border-radius: 6px;
}

.product-card-body {
  padding: 16px 18px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.product-card-body h3 a {
  color: var(--color-primary);
}

.product-card-body h3 a:hover {
  color: var(--color-accent);
}

.product-card-model {
  font-size: 13px;
  color: var(--color-muted);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.product-card-facts {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13.5px;
  color: var(--color-body);
  margin: 4px 0 6px;
}

.product-card-cta {
  margin-top: auto;
  font-weight: 600;
  font-size: 14.5px;
  color: var(--color-accent);
}

.product-card-cta:hover {
  color: var(--color-accent-hover);
}

/* 分类卡 */
.category-card {
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-base);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.category-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.category-card a {
  display: block;
  padding: 30px 26px;
  color: var(--color-body);
}

.category-card h3 {
  color: var(--color-primary);
  margin-bottom: 8px;
}

.category-card p {
  color: var(--color-muted);
  font-size: 15px;
}

/* ---- 工厂事实区 ---- */
.factory-body {
  font-size: 17px;
  max-width: 860px;
  margin-bottom: 28px;
}

.factory-images {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.factory-images img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: contain;
  background: var(--color-base);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 12px;
}

/* ---- Logo 工艺条 ---- */
.logo-strip-section {
  text-align: center;
}

.logo-line {
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 600;
  color: var(--color-body);
  line-height: 1.8;
  max-width: 900px;
  margin: 0 auto 10px;
}

.logo-note {
  color: var(--color-muted);
}

.logo-note a {
  font-weight: 600;
  color: var(--color-accent);
}

/* ---- 信任区 ---- */
.trust-section {
  background: var(--color-primary);
  color: #fff;
}

.trust-section h2 {
  color: #fff;
}

.trust-body {
  font-size: 17px;
  color: #e7e0e4;
  max-width: 920px;
}

/* ---- FAQ ---- */
.faq-list {
  display: flex;
  flex-direction: column;
  max-width: 900px;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: 18px 0;
}

.faq-item:last-child {
  border-bottom: 0;
}

.faq-item h3 {
  margin-bottom: 6px;
  font-weight: 600;
}

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

/* ---- 询盘区 ---- */
.inquiry-section {
  background: var(--color-primary);
}

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

.inquiry-inner h2 {
  color: #fff;
  margin-bottom: 26px;
}

.inquiry-channels {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.inquiry-wechat {
  color: #d8cfd4;
  font-size: 15px;
  margin-top: 16px;
}

/* ---- 按钮 ---- */
.btn {
  display: inline-block;
  border-radius: 8px;
  padding: 13px 26px;
  font-weight: 600;
  font-size: 16px;
  font-family: var(--font-body);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
  text-align: center;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  color: #fff;
}

.btn-secondary {
  background: var(--color-primary);
  color: #fff;
}

.btn-secondary:hover {
  background: var(--color-primary-hover);
  color: #fff;
}

.btn-whatsapp {
  background: var(--color-whatsapp);
  color: #fff;
}

.btn-whatsapp:hover {
  background: #1fb557;
  color: #fff;
}

/* ---- 面包屑 ---- */
.breadcrumbs {
  font-size: 13.5px;
  color: var(--color-muted);
  margin-bottom: 14px;
}

.breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.breadcrumbs li:not(:last-child)::after {
  content: "/";
  color: var(--color-border);
}

.breadcrumbs a {
  color: var(--color-muted);
}

.breadcrumbs a:hover {
  color: var(--color-accent);
}

/* ---- 页面头 ---- */
.page-head {
  background: var(--color-soft);
  padding: 44px 0 40px;
}

.page-intro {
  color: var(--color-muted);
  font-size: 17px;
  max-width: 860px;
  margin-top: 14px;
}

.category-tagline {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-body);
  font-size: 18px;
  margin-top: 8px;
}

.product-model-line {
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-accent);
  margin-top: 6px;
  font-size: 14px;
}

/* ---- 表格 ---- */
.table-wrap {
  overflow-x: auto;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  min-width: 560px;
}

.spec-table th,
.spec-table td {
  border: 1px solid var(--color-border);
  padding: 12px 16px;
  text-align: left;
  vertical-align: top;
}

.spec-table .spec-head {
  background: var(--color-primary);
  color: #fff;
  font-weight: 600;
  white-space: nowrap;
}

.spec-table th {
  background: var(--color-primary);
  color: #fff;
  font-weight: 600;
}

.spec-table tr th {
  background: var(--color-soft);
  color: var(--color-body);
  font-weight: 600;
  width: 220px;
}

.spec-table thead th {
  background: var(--color-primary);
  color: #fff;
}

.spec-note {
  margin-top: 12px;
  font-size: 13px;
  color: var(--color-muted);
}

/* ---- 图集(产品页) ---- */
.gallery-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.gallery-item {
  background: var(--color-soft);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 16px;
}

.gallery-item img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: contain;
  background: var(--color-soft);
  border-radius: 6px;
}

/* ---- 产品页内容 ---- */
.feature-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 24px;
  margin-bottom: 34px;
  max-width: 860px;
}

.feature-list li {
  padding-left: 22px;
  position: relative;
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--color-accent);
}

.logo-methods-heading {
  margin-top: 8px;
}

.logo-methods-line {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-body);
  font-size: 17px;
  margin-bottom: 26px;
}

.hard-facts {
  list-style: none;
  background: var(--color-soft);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 18px 22px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-weight: 600;
  color: var(--color-primary);
  max-width: 860px;
}

/* ---- 静态页 ---- */
.body-paragraph {
  font-size: 17px;
  color: var(--color-body);
  max-width: 860px;
  margin-bottom: 22px;
}

.factory-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 8px;
}

.factory-grid img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  background: var(--color-soft);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 10px;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.about-grid img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  background: var(--color-soft);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 10px;
}

.custom-logo-media {
  margin: 32px 0;
  background: var(--color-soft);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 16px;
  max-width: 520px;
}

.custom-logo-media img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  background: var(--color-soft);
  border-radius: 6px;
}

.custom-logo-cta {
  margin-top: 8px;
}

/* ---- 联系页 ---- */
.contact-channels {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 640px;
  margin-bottom: 30px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  overflow: hidden;
}

.contact-row {
  display: flex;
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-border);
  gap: 20px;
  background: var(--color-base);
}

.contact-row:last-child {
  border-bottom: 0;
}

.contact-label {
  font-weight: 600;
  color: var(--color-primary);
  min-width: 100px;
}

.contact-value {
  color: var(--color-body);
  word-break: break-all;
}

.contact-cta {
  justify-content: flex-start;
}

/* ---- Use Cases ---- */
.usecase-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 860px;
}

.usecase-list li {
  padding: 16px 20px;
  background: var(--color-soft);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 8px 8px 0;
  font-weight: 500;
}

/* ---- 页脚 ---- */
.site-footer {
  background: var(--color-primary);
  color: #e7e0e4;
  padding: 52px 0 36px;
  font-size: 15px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 28px 48px;
}

.footer-wordmark {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 20px;
  color: #fff;
  letter-spacing: -0.02em;
  display: block;
  margin-bottom: 10px;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-contact a {
  color: #e7e0e4;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-contact a:hover {
  color: #fff;
}

.footer-copy {
  grid-column: 1 / -1;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  padding-top: 20px;
  margin-top: 8px;
  font-size: 13.5px;
  color: #cfc5cb;
}

/* ---- 悬浮 WhatsApp 球 ---- */
.whatsapp-float {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-whatsapp);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.22);
  transition: transform 0.18s ease;
}

.whatsapp-float:hover {
  transform: scale(1.06);
}

/* ---- 响应式 ---- */
@media (max-width: 1280px) {
  .card-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 1024px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  :root {
    --section-pad: 48px;
  }

  .container {
    padding: 0 20px;
  }

  h1 {
    font-size: 30px;
  }

  h2 {
    font-size: 24px;
  }

  body {
    font-size: 15px;
  }

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

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

  .factory-images,
  .factory-grid,
  .about-grid {
    grid-template-columns: 1fr;
  }

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

  .feature-list {
    grid-template-columns: 1fr;
  }

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

  .wordmark {
    font-size: 18px;
  }

  .hero-strip-list {
    flex-direction: column;
    gap: 8px;
  }

  .table-wrap {
    -webkit-overflow-scrolling: touch;
  }
}

@media (max-width: 414px) {
  h1 {
    font-size: 27px;
  }

  .hero-sub {
    font-size: 16px;
  }

  .hero-media img {
    aspect-ratio: 3 / 4;
  }

  .product-card-media img {
    aspect-ratio: 4 / 5;
  }
}

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

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