/* ========================================
   OCHEW 欧褚男装 — Corporate Website Styles
   Minimal, elegant, responsive
   ======================================== */

/* Brand Chinese Characters — 欧 (U+6B27) / 褚 (U+8910) */
@font-face {
  font-family: "OchewBrandCN";
  src: url("../assets/fonts/TTZHILIF.TTF") format("truetype");
  font-display: swap;
  unicode-range: U+6B27, U+8910;
}

/* Brand English Letters — O (U+004F) C (U+0043) H (U+0048) E (U+0045) W (U+0057) */
@font-face {
  font-family: "OchewBrandEN";
  src: url("../assets/fonts/EXOTC350.TTF") format("truetype");
  font-display: swap;
  unicode-range: U+004F, U+0043, U+0048, U+0045, U+0057;
}

/* CSS Variables */
:root {
  --color-bg: #FAFAF8;
  --color-surface: #FFFFFF;
  --color-text: #111111;
  --color-text-muted: #767676;
  --color-accent: #9A7B4F;
  --color-accent-dark: #7A633F;
  --color-border: #EAE8E4;
  --color-border-dark: #D4D1CB;
  --color-overlay: rgba(17, 17, 17, 0.45);

  --font-display: "Noto Serif SC", "Songti SC", Georgia, "Times New Roman", serif;
  --font-body: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  --container: 1280px;
  --container-narrow: 720px;
  --header-height: 110px;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
  list-style: none;
}

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

input, textarea {
  font-family: inherit;
  font-size: 1rem;
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
h4 { font-size: 1.125rem; }

p {
  margin-bottom: var(--space-md);
  color: var(--color-text-muted);
}

.lead {
  font-size: 1.25rem;
  line-height: 1.6;
  color: var(--color-text-muted);
}

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

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

/* Layout */
.container {
  width: min(100% - var(--space-lg) * 2, var(--container));
  margin-inline: auto;
}

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

.section {
  padding-block: var(--space-3xl);
}

.section-sm {
  padding-block: var(--space-2xl);
}

.section-header {
  max-width: 640px;
  margin-bottom: var(--space-xl);
}

.section-header h2 {
  margin-bottom: var(--space-sm);
}

.section-header p {
  margin-bottom: 0;
}

.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.flex {
  display: flex;
}

.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 1000;
  background: rgba(250, 250, 248, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.site-header.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.03);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--color-text);
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.logo span {
  color: var(--color-accent);
}

.logo-img {
  height: 88px;
  width: auto;
  max-width: 320px;
  object-fit: contain;
  display: block;
  transition: transform var(--transition-fast);
  filter: brightness(0.92) contrast(1.05);
}

.logo:hover .logo-img {
  transform: scale(1.03);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.main-nav a {
  position: relative;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
  padding-block: 0.5rem;
}

.main-nav a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--transition-base);
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--color-accent);
}

.main-nav a:hover::after,
.main-nav a.active::after {
  width: 100%;
}

.menu-toggle {
  display: none;
  width: 32px;
  height: 32px;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Footer */
.site-footer {
  background: var(--color-text);
  color: var(--color-bg);
  padding-block: var(--space-3xl) var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer-brand .logo {
  color: var(--color-bg);
  margin-bottom: var(--space-md);
  display: inline-block;
}

.footer-brand p {
  color: rgba(250, 250, 248, 0.65);
  max-width: 280px;
}

.footer-title {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
  color: rgba(250, 250, 248, 0.85);
}

.footer-links li {
  margin-bottom: var(--space-xs);
}

.footer-links a {
  color: rgba(250, 250, 248, 0.55);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(250, 250, 248, 0.1);
  font-size: 0.875rem;
  color: rgba(250, 250, 248, 0.5);
}

.social-links {
  display: flex;
  gap: var(--space-md);
}

.social-links a {
  width: 40px;
  height: 40px;
  border: 1px solid rgba(250, 250, 248, 0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.social-links a:hover {
  border-color: var(--color-accent);
  background: rgba(154, 123, 79, 0.1);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  transition: transform var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.btn-primary {
  background: var(--color-text);
  color: var(--color-bg);
  border: 1px solid var(--color-text);
}

.btn-primary:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border-dark);
}

.btn-outline:hover {
  border-color: var(--color-text);
  background: var(--color-text);
  color: var(--color-bg);
  transform: translateY(-2px);
}

.btn-outline-light {
  background: transparent;
  color: var(--color-bg);
  border: 1px solid rgba(250, 250, 248, 0.3);
}

.btn-outline-light:hover {
  background: var(--color-bg);
  color: var(--color-text);
  border-color: var(--color-bg);
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 0.95rem;
}

/* Hero */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding-top: var(--header-height);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(17, 17, 17, 0.72) 0%, rgba(17, 17, 17, 0.35) 55%, rgba(17, 17, 17, 0.15) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(100% - var(--space-lg) * 2, var(--container));
  text-align: left;
  color: var(--color-bg);
}

.hero-subtitle {
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
  opacity: 0.85;
}

.hero-title {
  max-width: 780px;
  margin-bottom: var(--space-lg);
  line-height: 1.1;
}

.hero-title em {
  font-style: italic;
  color: var(--color-accent);
}

.hero-desc {
  max-width: 520px;
  font-size: 1.125rem;
  color: rgba(250, 250, 248, 0.8);
  margin-bottom: var(--space-xl);
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.hero-scroll {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  color: rgba(250, 250, 248, 0.6);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
}

.hero-scroll::after {
  content: "";
  width: 1px;
  height: 48px;
  background: rgba(250, 250, 248, 0.3);
}

/* Page Banner */
.page-banner {
  position: relative;
  min-height: 50svh;
  max-height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: var(--header-height);
  overflow: hidden;
}

.page-banner-bg {
  position: absolute;
  inset: 0;
}

.page-banner-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.page-banner-overlay {
  position: absolute;
  inset: 0;
  background: var(--color-overlay);
}

.page-banner-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--color-bg);
}

.page-banner-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  margin-bottom: var(--space-sm);
}

.page-banner-subtitle {
  font-size: 1.125rem;
  opacity: 0.85;
}

/* Cards */
.feature-card {
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.05);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  color: var(--color-accent);
}

.feature-card h3 {
  margin-bottom: var(--space-xs);
  font-family: var(--font-display);
}

.feature-card p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* Product Cards */
.product-card {
  position: relative;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.08);
}

.product-image {
  aspect-ratio: 3 / 4;
  overflow: hidden;
  background: #F0EFEB;
}

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

.product-card:hover .product-image img {
  transform: scale(1.05);
}

.product-info {
  padding: var(--space-md);
}

.product-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

.product-info h3 {
  font-family: var(--font-body);
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.product-info p {
  font-size: 0.9rem;
  margin-bottom: 0;
}

.product-price {
  margin-top: var(--space-sm);
  font-weight: 600;
  color: var(--color-text);
}

/* Split Section */
.split-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.split-media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
}

.split-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

.split-content .section-label {
  margin-bottom: var(--space-md);
}

.split-content h2 {
  margin-bottom: var(--space-md);
}

.split-content p {
  margin-bottom: var(--space-md);
}

.split-content .btn {
  margin-top: var(--space-sm);
}

/* Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding-block: var(--space-xl);
  margin-top: var(--space-xl);
}

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

.stat-number {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* Quote / Philosophy */
.quote-section {
  background: var(--color-surface);
  border-block: 1px solid var(--color-border);
}

blockquote {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  line-height: 1.4;
  text-align: center;
  max-width: 900px;
  margin-inline: auto;
  color: var(--color-text);
}

blockquote footer {
  margin-top: var(--space-md);
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* Timeline / Values list */
.values-list {
  display: grid;
  gap: var(--space-lg);
}

.value-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-md);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.value-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.value-number {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
}

.value-content h3 {
  font-family: var(--font-body);
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.value-content p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* Services */
.service-card {
  padding: var(--space-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-align: center;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.06);
}

.service-card h3 {
  margin-block: var(--space-md) var(--space-xs);
  font-family: var(--font-body);
  font-weight: 600;
}

.service-card p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-xl);
  align-items: start;
}

.contact-info {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
}

.contact-info h3 {
  margin-bottom: var(--space-md);
}

.contact-item {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.contact-item:last-child {
  margin-bottom: 0;
}

.contact-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  flex-shrink: 0;
}

.contact-detail h4 {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.contact-detail p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* Form */
.form-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.form-note {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: var(--space-md);
}

/* Map placeholder */
.map-embed {
  width: 100%;
  height: 360px;
  border-radius: var(--radius-md);
  background: var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  overflow: hidden;
}

/* Reveal animations */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* Responsive */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root {
    --header-height: 100px;
    --space-3xl: 5rem;
    --space-2xl: 3.5rem;
    --space-xl: 2.5rem;
  }

  .logo-img {
    height: 76px;
    max-width: 280px;
  }

  .menu-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: var(--space-xl);
    gap: var(--space-md);
    transform: translateX(100%);
    transition: transform var(--transition-base);
  }

  .main-nav.open {
    transform: translateX(0);
  }

  .main-nav a {
    font-size: 1.25rem;
    padding-block: var(--space-sm);
  }

  .grid-2,
  .grid-3,
  .grid-4,
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .split-section,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }
}