/* ==========================================================================
   NONGZAO 农造 | Global Design System & Custom CSS
   Style: Minimalist, Architectural, Scholarly Modernism
   Exact Typography Match for NONGZAO Prototype
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design Tokens / CSS Custom Properties
   -------------------------------------------------------------------------- */
:root {
  /* Color Palette */
  --bg-primary: #f9f9f9;
  --text-primary: #1a1c1c;
  --text-secondary: #444748;
  --text-muted: #747878;
  --text-light: #c4c7c7;
  --border-color: #e2e2e2;
  --surface-low: #f4f3f3;
  --surface-high: #eeeeee;

  /* Typography Stack */
  --font-serif: "Noto Serif", "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-sans: "Work Sans", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  /* Spacing System */
  --container-max: 1800px;
  --header-padding-x: clamp(24px, 8vw, 150px);
  --section-gap: clamp(32px, 4vw, 56px);
  --gutter: clamp(20px, 3vw, 40px);

  /* Transitions */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 0.25s var(--ease-out-expo);
  --transition-normal: 0.4s var(--ease-out-expo);
  --transition-slow: 0.8s var(--ease-out-expo);
}

/* --------------------------------------------------------------------------
   2. Reset & Base Styles
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

button {
  background: none;
  border: none;
  font: inherit;
  color: inherit;
  cursor: pointer;
}

/* --------------------------------------------------------------------------
   3. Utility Typography Classes (Matching Original Tailwind Tokens)
   -------------------------------------------------------------------------- */
.font-serif-title {
  font-family: var(--font-serif);
}

.font-sans-body {
  font-family: var(--font-sans);
}

/* --------------------------------------------------------------------------
   4. Layout & Container Utilities
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--header-padding-x);
  padding-right: var(--header-padding-x);
}

.main-content {
  flex: 1 0 auto;
  padding-top: clamp(40px, 6vw, 80px);
  padding-bottom: var(--section-gap);
}

/* --------------------------------------------------------------------------
   5. Site Header & Top Navigation
   -------------------------------------------------------------------------- */
.site-header {
  width: 100%;
  padding-top: 64px;
  padding-bottom: 24px;
  position: relative;
  z-index: 50;
  background-color: var(--bg-primary);
  transition: box-shadow var(--transition-fast);
}

.site-header.is-scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.brand-logo {
  display: inline-block;
  height: 48px;
  transition: opacity var(--transition-fast);
}

@media (min-width: 768px) {
  .brand-logo {
    height: 64px;
  }
}

.brand-logo:hover {
  opacity: 0.8;
}

.brand-logo img {
  height: 100%;
  width: auto;
  object-fit: contain;
}

.header-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 16px;
}

.lang-switch {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 4px;
}

.lang-switch .lang-muted {
  color: var(--text-light);
  font-weight: 700;
  transition: color var(--transition-fast);
}

.lang-switch .lang-muted:hover {
  color: var(--text-primary);
}

.lang-switch .lang-active {
  color: var(--text-primary);
  font-weight: 700;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-light);
  position: relative;
  padding-bottom: 2px;
  transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
}

.menu-toggle-btn {
  display: none;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 8px 14px;
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
}

/* --------------------------------------------------------------------------
   6. Slide-Out Drawer Menu
   -------------------------------------------------------------------------- */
.drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(2px);
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.drawer-backdrop.is-active {
  opacity: 1;
  visibility: visible;
}

.nav-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: min(360px, 85vw);
  height: 100vh;
  background-color: var(--bg-primary);
  border-left: 1px solid var(--border-color);
  z-index: 100;
  padding: 40px var(--gutter);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transform: translateX(100%);
  transition: transform var(--transition-normal);
}

.nav-drawer.is-active {
  transform: translateX(0);
}

.drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 40px;
}

.drawer-title {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 700;
}

.drawer-close {
  font-size: 28px;
  padding: 4px;
  line-height: 1;
  color: var(--text-primary);
  font-weight: 700;
}

.drawer-menu-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
  list-style: none;
}

.drawer-menu-link {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.drawer-menu-link:hover,
.drawer-menu-link.active {
  color: var(--text-primary);
}

.drawer-footer {
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.drawer-footer-title {
  font-family: var(--font-sans);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 700;
}

.drawer-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
}

/* --------------------------------------------------------------------------
   7. Index Page (Homepage Navigation)
   -------------------------------------------------------------------------- */
.index-nav-wrapper {
  display: flex;
  align-items: center;
  min-height: 50vh;
  padding-top: 80px;
  padding-bottom: 80px;
}

.index-nav-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gutter);
  width: 100%;
}

.index-nav-item {
  display: flex;
  flex-direction: column;
  padding: 24px 0;
  text-decoration: none;
  color: var(--text-primary);
}

.index-nav-item.align-center {
  align-items: center;
}

.index-nav-item.align-end {
  align-items: flex-end;
}

.index-nav-title {
  font-family: var(--font-sans);
  font-size: clamp(32px, 4.5vw, 48px);
  font-weight: 700;
  letter-spacing: 0.2em;
  white-space: nowrap;
  line-height: 1.2;
  transition: transform var(--transition-normal);
}

.index-nav-item:hover .index-nav-title {
  transform: scale(1.02);
}

.split-line {
  height: 1px;
  width: 0;
  background-color: var(--text-primary);
  margin-top: 16px;
  transition: width var(--transition-normal);
}

.index-nav-item:hover .split-line {
  width: 100%;
}

/* --------------------------------------------------------------------------
   8. About Page
   -------------------------------------------------------------------------- */
.about-article {
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
}

.about-hero-text {
  font-family: var(--font-serif);
  font-size: clamp(24px, 3.2vw, 32px);
  font-weight: 700;
  line-height: 1.625;
  letter-spacing: -0.01em;
  margin-bottom: 48px;
  max-width: 800px;
}

.about-text-section {
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 0;
}

.about-text-section h3 {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 700;
  margin-top: 36px;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.about-text-section h3:first-child {
  margin-top: 0;
}

.about-text-section p {
  font-family: var(--font-sans);
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.65;
  margin-bottom: 36px;
}

.about-text-section p:last-child {
  margin-bottom: 0;
}

/* Parent Selector Controls Image inside Pure P Tag */
.about-text-section p img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
  margin-top: 0;
  transition: transform var(--transition-slow);
}

.about-text-section p img:hover {
  transform: scale(1.01);
}

/* Simple Custom HTML Tag for Image Caption Text */
note {
  display: block;
  margin-top: 16px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-primary);
}

/* --------------------------------------------------------------------------
   9. Contact Page (Pure Semantic Tags Styling)
   -------------------------------------------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gutter);
}

/* Section Titles (联系地址 / 业务咨询 / 关于创作) */
.contact-grid section h2 {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 40px;
  color: var(--text-primary);
}

/* Column 1: Physical Space Info List */
.contact-grid section:nth-child(1) > div:nth-child(2) {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.contact-grid section div > p {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.6;
}

/* Column 1 & Column 2: Architectural & Research Image Wrappers */
.contact-grid section > div:has(> img:only-child),
.contact-grid section:nth-child(1) > div:nth-child(3),
.contact-grid section:nth-child(2) > div:nth-child(3) {
  width: 100%;
  max-width: 100%;
  aspect-ratio: 4 / 5;
  background-color: var(--surface-low);
  overflow: hidden;
  margin-top: 24px;
}

.contact-grid section > div:has(> img:only-child) img,
.contact-grid section:nth-child(1) > div:nth-child(3) img,
.contact-grid section:nth-child(2) > div:nth-child(3) img {
  width: 100%;
  max-width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.contact-grid section > div:has(> img:only-child):hover img,
.contact-grid section:nth-child(1) > div:nth-child(3):hover img,
.contact-grid section:nth-child(2) > div:nth-child(3):hover img {
  transform: scale(1.05);
}

/* Column 2: Inquiry Groups (<p> tags inside div wrapper) */
.contact-grid section:nth-child(2) p {
  margin-bottom: 32px;
}

/* Inquiry Section Labels */
.contact-grid section:nth-child(2) p > span:first-child {
  display: block;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #5d5f5f;
  margin-bottom: 8px;
}

/* Inquiry Email Links */
.contact-grid section:nth-child(2) p > a {
  font-family: var(--font-serif);
  font-size: clamp(20px, 4.5vw, 32px);
  font-weight: 700;
  color: var(--text-primary);
  display: inline-block;
  position: relative;
  line-height: 1.3;
  max-width: 100%;
  word-break: break-all;
}

.contact-grid section:nth-child(2) p > a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: currentColor;
  transition: width var(--transition-normal);
}

.contact-grid section:nth-child(2) p > a:hover::after {
  width: 100%;
}

/* Social Media Navigation Links Container */
.contact-grid section:nth-child(2) p > span:last-child {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  margin-top: 8px;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 700;
  max-width: 100%;
}

.contact-grid section:nth-child(2) p > span:last-child a {
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

.contact-grid section:nth-child(2) p > span:last-child a:hover {
  color: var(--text-muted);
}

/* Column 3: About Text Paragraph */
.contact-grid section > p {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.8;
  color: var(--text-primary);
  max-width: 480px;
}

/* Column 3: Map Card Container & Location Icon */
.contact-grid section:nth-child(3) > div {
  width: 100%;
  max-width: 100%;
  aspect-ratio: 1 / 1;
  background-color: var(--surface-low);
  overflow: hidden;
  position: relative;
  margin-top: 24px;
}

.contact-grid section:nth-child(3) > div img {
  width: 100%;
  max-width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%);
  opacity: 0.8;
}

.contact-grid section:nth-child(3) > div span {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 36px;
  color: var(--text-primary);
  font-family: 'Material Symbols Outlined';
  font-weight: normal;
  font-style: normal;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  display: inline-block;
  white-space: nowrap;
  word-wrap: normal;
  direction: ltr;
  -webkit-font-smoothing: antialiased;
}

/* Column 3: Map Button */
.contact-grid section button {
  width: 100%;
  padding: 24px var(--gutter);
  border: 1px solid var(--text-light);
  background: transparent;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-primary);
  margin-top: 24px;
  cursor: pointer;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

.contact-grid section button:hover {
  background-color: var(--text-primary);
  color: #ffffff;
}

/* --------------------------------------------------------------------------
   10. Product Page
   -------------------------------------------------------------------------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  column-gap: var(--gutter);
  row-gap: 80px;
}

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

.product-img-wrapper {
  aspect-ratio: 3 / 4;
  background-color: var(--surface-low);
  overflow: hidden;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.product-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.product-card:hover .product-img-wrapper img {
  transform: scale(1.02);
}

.product-img-wrapper.is-placeholder {
  border: 1px solid var(--text-light);
  background-color: transparent;
}

.placeholder-tag {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.product-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.product-title {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   11. Site Footer
   -------------------------------------------------------------------------- */
.site-footer {
  width: 100%;
  padding-top: 40px;
  padding-bottom: 48px;
  margin-top: auto;
  background-color: var(--bg-primary);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-links {
  display: flex;
  gap: 40px;
  list-style: none;
}

.footer-link {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--text-primary);
}

.footer-brands {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  justify-content: flex-end;
  list-style: none;
}

.footer-brand-item {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.footer-brand-item a:hover {
  color: var(--text-primary);
}

.footer-copy {
  width: 100%;
  text-align: right;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-primary);
  margin-top: 16px;
}

/* --------------------------------------------------------------------------
   12. Animations & Scroll Reveal
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* --------------------------------------------------------------------------
   13. Responsive Media Queries
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .contact-grid section > div:has(> img:only-child),
  .contact-grid section:nth-child(1) > div:nth-child(3),
  .contact-grid section:nth-child(2) > div:nth-child(3) {
    aspect-ratio: 16 / 9;
  }

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

@media (max-width: 768px) {
  .desktop-nav {
    display: none;
  }

  .menu-toggle-btn {
    display: block;
  }

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

  .index-nav-item.align-center,
  .index-nav-item.align-end {
    align-items: flex-start;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-brands {
    justify-content: flex-start;
  }

  .footer-copy {
    text-align: left;
  }
}