/* ===== CSS Variables ===== */
:root {
  --tea-dark: #3D2B1F;
  --tea-green: #2D4A3E;
  --tea-green-light: #3A5F4F;
  --paper: #F5F0E8;
  --paper-dark: #EDE6D8;
  --amber: #C9A96E;
  --amber-light: #D4B87A;
  --amber-dark: #A88B4A;
  --text-dark: #2A1F17;
  --text-body: #4A3D2F;
  --text-light: #8B7D6B;
  --white: #FFFFFF;
  --shadow-sm: 0 2px 8px rgba(61,43,31,0.08);
  --shadow-md: 0 8px 30px rgba(61,43,31,0.12);
  --shadow-lg: 0 20px 60px rgba(61,43,31,0.18);
  --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  color: var(--text-body);
  background-color: var(--paper);
  line-height: 1.8;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5 {
  font-family: 'Noto Serif SC', 'Songti SC', 'SimSun', serif;
  color: var(--text-dark);
  font-weight: 700;
  line-height: 1.4;
}

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

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

ul {
  list-style: none;
}

/* ===== Paper Texture Background ===== */
.paper-bg {
  background-color: var(--paper);
  background-image:
    radial-gradient(ellipse at 20% 30%, rgba(201,169,110,0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 70%, rgba(45,74,62,0.04) 0%, transparent 50%);
}

/* ===== Container ===== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 40px;
}

@media (max-width: 768px) {
  .container {
    padding: 0 24px;
  }
}

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: var(--transition);
  background: transparent;
}

.nav.scrolled {
  background: rgba(245,240,232,0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-sm);
  padding: 14px 0;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-logo-seal {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: contain;
  background: var(--white);
  box-shadow: 0 2px 12px rgba(61,43,31,0.2);
  transition: var(--transition);
}

.nav-logo-text {
  font-family: 'Noto Serif SC', serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 4px;
  transition: var(--transition);
}

.nav.scrolled .nav-logo-text {
  color: var(--tea-dark);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  position: relative;
  padding: 4px 0;
}

.nav.scrolled .nav-links a {
  color: var(--text-body);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--amber);
  transition: var(--transition);
  transform: translateX(-50%);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-links a:hover {
  color: var(--amber);
}

.nav-cta {
  padding: 10px 28px;
  background: var(--amber);
  color: var(--white) !important;
  border-radius: 2px;
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 1px;
}

.nav-cta:hover {
  background: var(--amber-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 15px rgba(201,169,110,0.4);
}

.nav-cta::after {
  display: none !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: var(--transition);
}

.nav.scrolled .nav-toggle span {
  background: var(--tea-dark);
}

@media (max-width: 900px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--paper);
    padding: 30px;
    gap: 20px;
    box-shadow: var(--shadow-md);
  }
  .nav-links.open {
    display: flex;
  }
  .nav-links a {
    color: var(--text-body) !important;
  }
  .nav-toggle {
    display: flex;
  }
}

/* ===== Hero Section ===== */
.hero {
  position: relative;
  height: 100vh;
  min-height: 640px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url('images/hero-tea-mountain.jpg');
  background-size: cover;
  background-position: center;
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    rgba(42,31,23,0.75) 0%,
    rgba(45,74,62,0.55) 50%,
    rgba(42,31,23,0.65) 100%
  );
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 40px;
  width: 100%;
}

.hero-vertical-title {
  position: absolute;
  right: 60px;
  top: 50%;
  transform: translateY(-50%);
  writing-mode: vertical-rl;
  font-family: 'Noto Serif SC', serif;
  font-size: 120px;
  font-weight: 900;
  color: rgba(255,255,255,0.08);
  letter-spacing: 20px;
  z-index: 1;
  user-select: none;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
  opacity: 0;
  animation: fadeInUp 1s ease 0.3s forwards;
}

.hero-eyebrow-line {
  width: 40px;
  height: 1px;
  background: var(--amber);
}

.hero-eyebrow-text {
  font-size: 14px;
  letter-spacing: 6px;
  color: var(--amber-light);
  font-weight: 500;
  text-transform: uppercase;
}

.hero-title {
  font-size: clamp(48px, 8vw, 96px);
  font-weight: 900;
  color: var(--white);
  letter-spacing: 12px;
  margin-bottom: 24px;
  opacity: 0;
  animation: fadeInUp 1s ease 0.5s forwards;
  text-shadow: 0 4px 30px rgba(0,0,0,0.3);
}

.hero-subtitle {
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(18px, 2.5vw, 26px);
  font-weight: 400;
  color: rgba(255,255,255,0.9);
  letter-spacing: 4px;
  margin-bottom: 20px;
  opacity: 0;
  animation: fadeInUp 1s ease 0.7s forwards;
}

.hero-desc {
  font-size: 16px;
  color: rgba(255,255,255,0.7);
  max-width: 560px;
  line-height: 2;
  margin-bottom: 44px;
  opacity: 0;
  animation: fadeInUp 1s ease 0.9s forwards;
}

.hero-buttons {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeInUp 1s ease 1.1s forwards;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 40px;
  background: var(--amber);
  color: var(--white);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 3px;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.6s ease;
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-primary:hover {
  background: var(--amber-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(201,169,110,0.5);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 40px;
  background: transparent;
  color: var(--white);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 3px;
  border: 1px solid rgba(255,255,255,0.4);
  cursor: pointer;
  transition: var(--transition);
}

.btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--amber);
  color: var(--amber-light);
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  opacity: 0;
  animation: fadeIn 1s ease 1.5s forwards;
}

.hero-scroll-text {
  font-size: 11px;
  letter-spacing: 4px;
  color: rgba(255,255,255,0.6);
  writing-mode: vertical-rl;
}

.hero-scroll-line {
  width: 1px;
  height: 50px;
  background: linear-gradient(to bottom, var(--amber), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
  0%, 100% { transform: scaleY(1); opacity: 1; }
  50% { transform: scaleY(0.5); opacity: 0.5; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@media (max-width: 768px) {
  .hero-content {
    padding: 0 24px;
  }
  .hero-vertical-title {
    display: none;
  }
  .hero-title {
    letter-spacing: 8px;
  }
  .hero-buttons {
    flex-direction: column;
    align-items: flex-start;
  }
  .btn-primary, .btn-outline {
    width: 100%;
    justify-content: center;
  }
}

/* ===== Section Common ===== */
.section {
  padding: 120px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 80px;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.section-eyebrow::before,
.section-eyebrow::after {
  content: '';
  width: 30px;
  height: 1px;
  background: var(--amber);
}

.section-eyebrow span {
  font-size: 13px;
  letter-spacing: 6px;
  color: var(--amber-dark);
  font-weight: 500;
}

.section-title {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  color: var(--tea-dark);
  letter-spacing: 6px;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
  line-height: 2;
}

@media (max-width: 768px) {
  .section {
    padding: 80px 0;
  }
  .section-header {
    margin-bottom: 50px;
  }
}

/* ===== About Section ===== */
.about {
  background: var(--paper);
  position: relative;
  overflow: hidden;
}

.about::before {
  content: '茶';
  position: absolute;
  right: -40px;
  top: 50%;
  transform: translateY(-50%);
  font-family: 'Noto Serif SC', serif;
  font-size: 400px;
  font-weight: 900;
  color: rgba(201,169,110,0.05);
  z-index: 0;
  user-select: none;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.about-image {
  position: relative;
}

.about-image img {
  width: 100%;
  height: 560px;
  object-fit: cover;
  box-shadow: var(--shadow-lg);
}

.about-image-frame {
  position: absolute;
  top: -20px;
  left: -20px;
  right: 20px;
  bottom: 20px;
  border: 1px solid var(--amber);
  z-index: -1;
}

.about-image-badge {
  position: absolute;
  bottom: 30px;
  right: -20px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--tea-dark);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--amber);
  box-shadow: var(--shadow-md);
}

.about-image-badge-num {
  font-family: 'Noto Serif SC', serif;
  font-size: 36px;
  font-weight: 900;
  line-height: 1;
}

.about-image-badge-text {
  font-size: 12px;
  letter-spacing: 2px;
  margin-top: 6px;
}

.about-content {
  padding-left: 20px;
}

.about-vertical-label {
  writing-mode: vertical-rl;
  font-family: 'Noto Serif SC', serif;
  font-size: 14px;
  letter-spacing: 8px;
  color: var(--amber-dark);
  margin-bottom: 30px;
  font-weight: 600;
}

.about-title {
  font-size: 38px;
  font-weight: 700;
  color: var(--tea-dark);
  letter-spacing: 4px;
  margin-bottom: 30px;
  line-height: 1.5;
}

.about-text {
  font-size: 15px;
  line-height: 2.2;
  color: var(--text-body);
  margin-bottom: 24px;
}

.about-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
  padding-top: 40px;
  border-top: 1px solid rgba(201,169,110,0.3);
}

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

.about-feature-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-feature-icon svg {
  width: 36px;
  height: 36px;
  stroke: var(--amber-dark);
  fill: none;
  stroke-width: 1.5;
}

.about-feature-title {
  font-family: 'Noto Serif SC', serif;
  font-size: 15px;
  font-weight: 600;
  color: var(--tea-dark);
  margin-bottom: 4px;
  letter-spacing: 2px;
}

.about-feature-desc {
  font-size: 12px;
  color: var(--text-light);
}

@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 50px;
  }
  .about-image img {
    height: 400px;
  }
  .about-image-badge {
    width: 90px;
    height: 90px;
    right: 10px;
  }
  .about-image-badge-num {
    font-size: 28px;
  }
  .about-content {
    padding-left: 0;
  }
  .about-title {
    font-size: 28px;
  }
  .about-features {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

/* ===== Business Section ===== */
.business {
  background: var(--tea-dark);
  position: relative;
  overflow: hidden;
}

.business::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    radial-gradient(circle at 20% 80%, rgba(201,169,110,0.08) 0%, transparent 40%),
    radial-gradient(circle at 80% 20%, rgba(45,74,62,0.3) 0%, transparent 40%);
}

.business .section-title {
  color: var(--paper);
}

.business .section-desc {
  color: rgba(245,240,232,0.6);
}

.business .section-eyebrow span {
  color: var(--amber);
}

.business-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  position: relative;
  z-index: 1;
}

.business-card {
  background: rgba(245,240,232,0.04);
  border: 1px solid rgba(201,169,110,0.15);
  padding: 0;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.business-card:hover {
  transform: translateY(-8px);
  border-color: rgba(201,169,110,0.4);
  background: rgba(245,240,232,0.07);
  box-shadow: 0 20px 50px rgba(0,0,0,0.3);
}

.business-card-image {
  height: 240px;
  overflow: hidden;
  position: relative;
}

.business-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.business-card:hover .business-card-image img {
  transform: scale(1.08);
}

.business-card-image::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to bottom, transparent 50%, rgba(61,43,31,0.6) 100%);
}

.business-card-num {
  position: absolute;
  top: 20px;
  left: 20px;
  z-index: 2;
  font-family: 'Noto Serif SC', serif;
  font-size: 48px;
  font-weight: 900;
  color: rgba(255,255,255,0.15);
  line-height: 1;
}

.business-card-content {
  padding: 36px 32px 40px;
}

.business-card-title {
  font-family: 'Noto Serif SC', serif;
  font-size: 24px;
  font-weight: 700;
  color: var(--paper);
  letter-spacing: 3px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.business-card-title::before {
  content: '';
  width: 4px;
  height: 24px;
  background: var(--amber);
}

.business-card-desc {
  font-size: 14px;
  color: rgba(245,240,232,0.65);
  line-height: 2;
  margin-bottom: 24px;
}

.business-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

.business-card-tag {
  padding: 5px 14px;
  background: rgba(201,169,110,0.12);
  border: 1px solid rgba(201,169,110,0.25);
  color: var(--amber);
  font-size: 12px;
  letter-spacing: 1px;
}

.business-card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--amber);
  letter-spacing: 2px;
  font-weight: 500;
}

.business-card-link svg {
  width: 16px;
  height: 16px;
  stroke: var(--amber);
  fill: none;
  stroke-width: 2;
  transition: var(--transition);
}

.business-card:hover .business-card-link svg {
  transform: translateX(4px);
}

@media (max-width: 900px) {
  .business-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .business-card-image {
    height: 200px;
  }
}

/* ===== Products Section ===== */
.products {
  background: var(--paper);
}

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

.product-card {
  background: var(--white);
  border: 1px solid rgba(201,169,110,0.15);
  overflow: hidden;
  transition: var(--transition);
  position: relative;
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(201,169,110,0.4);
}

.product-card-image {
  height: 220px;
  overflow: hidden;
  position: relative;
  background: var(--paper-dark);
}

.product-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.product-card:hover .product-card-image img {
  transform: scale(1.06);
}

.product-card-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 5px 14px;
  background: var(--tea-green);
  color: var(--paper);
  font-size: 11px;
  letter-spacing: 2px;
  font-weight: 500;
}

.product-card-badge.hot {
  background: var(--amber-dark);
}

.product-card-content {
  padding: 24px 22px 28px;
}

.product-card-category {
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--amber-dark);
  margin-bottom: 8px;
  font-weight: 500;
}

.product-card-name {
  font-family: 'Noto Serif SC', serif;
  font-size: 19px;
  font-weight: 700;
  color: var(--tea-dark);
  letter-spacing: 2px;
  margin-bottom: 10px;
}

.product-card-desc {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 18px;
}

.product-card-specs {
  display: flex;
  gap: 16px;
  padding-top: 16px;
  border-top: 1px solid rgba(201,169,110,0.15);
}

.product-card-spec {
  font-size: 12px;
  color: var(--text-light);
}

.product-card-spec strong {
  color: var(--tea-dark);
  font-weight: 600;
  margin-right: 4px;
}

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

@media (max-width: 600px) {
  .products-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== Origin Section ===== */
.origin {
  background: var(--tea-green);
  position: relative;
  overflow: hidden;
}

.origin::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('images/hero-tea-mountain.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.1;
}

.origin .section-title {
  color: var(--paper);
}

.origin .section-desc {
  color: rgba(245,240,232,0.6);
}

.origin .section-eyebrow span {
  color: var(--amber);
}

.origin-content {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.origin-text h3 {
  font-size: 28px;
  color: var(--paper);
  margin-bottom: 24px;
  letter-spacing: 3px;
  line-height: 1.6;
}

.origin-text p {
  font-size: 15px;
  color: rgba(245,240,232,0.75);
  line-height: 2.2;
  margin-bottom: 20px;
}

.origin-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 40px;
  padding-top: 40px;
  border-top: 1px solid rgba(245,240,232,0.15);
}

.origin-stat-num {
  font-family: 'Noto Serif SC', serif;
  font-size: 42px;
  font-weight: 900;
  color: var(--amber);
  line-height: 1;
  margin-bottom: 8px;
}

.origin-stat-num span {
  font-size: 18px;
  font-weight: 400;
  margin-left: 4px;
}

.origin-stat-label {
  font-size: 13px;
  color: rgba(245,240,232,0.6);
  letter-spacing: 1px;
}

.origin-image {
  position: relative;
}

.origin-image img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  box-shadow: var(--shadow-lg);
}

.origin-image-seal {
  position: absolute;
  top: -25px;
  right: -25px;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: var(--amber);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Noto Serif SC', serif;
  font-size: 28px;
  font-weight: 900;
  color: var(--white);
  box-shadow: 0 8px 30px rgba(201,169,110,0.5);
  letter-spacing: 0;
}

@media (max-width: 900px) {
  .origin-content {
    grid-template-columns: 1fr;
    gap: 50px;
  }
  .origin-image img {
    height: 350px;
  }
  .origin-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
  .origin-stat-num {
    font-size: 32px;
  }
}

/* ===== Process Section ===== */
.process {
  background: var(--paper);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}

.process-step {
  text-align: center;
  padding: 40px 24px;
  position: relative;
}

.process-step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 60px;
  right: 0;
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--amber), transparent);
}

.process-step-num {
  width: 60px;
  height: 60px;
  margin: 0 auto 24px;
  border-radius: 50%;
  background: var(--paper-dark);
  border: 2px solid var(--amber);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Noto Serif SC', serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--amber-dark);
  transition: var(--transition);
}

.process-step:hover .process-step-num {
  background: var(--amber);
  color: var(--white);
  transform: scale(1.1);
}

.process-step-title {
  font-family: 'Noto Serif SC', serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--tea-dark);
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.process-step-desc {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.9;
}

@media (max-width: 900px) {
  .process-steps {
    grid-template-columns: repeat(2, 1fr);
  }
  .process-step:nth-child(2)::after {
    display: none;
  }
}

@media (max-width: 600px) {
  .process-steps {
    grid-template-columns: 1fr;
  }
  .process-step::after {
    display: none !important;
  }
}

/* ===== Contact Section ===== */
.contact {
  background: var(--paper-dark);
  position: relative;
  overflow: hidden;
}

.contact::before {
  content: '合作';
  position: absolute;
  left: -30px;
  top: 50%;
  transform: translateY(-50%);
  font-family: 'Noto Serif SC', serif;
  font-size: 300px;
  font-weight: 900;
  color: rgba(201,169,110,0.05);
  z-index: 0;
  user-select: none;
  writing-mode: vertical-rl;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 80px;
  position: relative;
  z-index: 1;
}

.contact-info h2 {
  font-size: 36px;
  color: var(--tea-dark);
  margin-bottom: 20px;
  letter-spacing: 4px;
}

.contact-info > p {
  font-size: 15px;
  color: var(--text-light);
  line-height: 2;
  margin-bottom: 40px;
}

.contact-items {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.contact-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.contact-item-icon {
  width: 48px;
  height: 48px;
  min-width: 48px;
  border-radius: 50%;
  background: var(--tea-dark);
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-item-icon svg {
  width: 22px;
  height: 22px;
  stroke: var(--amber);
  fill: none;
  stroke-width: 1.5;
}

.contact-item-content h4 {
  font-family: 'Noto Serif SC', serif;
  font-size: 15px;
  font-weight: 600;
  color: var(--tea-dark);
  margin-bottom: 6px;
  letter-spacing: 2px;
}

.contact-item-content p {
  font-size: 14px;
  color: var(--text-body);
  line-height: 1.7;
}

.contact-qr {
  margin-top: 36px;
  padding: 28px;
  background: var(--white);
  border: 1px solid rgba(201,169,110,0.2);
  display: flex;
  align-items: center;
  gap: 24px;
  box-shadow: var(--shadow-sm);
}

.contact-qr-image {
  width: 120px;
  height: 120px;
  min-width: 120px;
  padding: 8px;
  background: var(--white);
  border: 1px solid rgba(201,169,110,0.15);
}

.contact-qr-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.contact-qr-text {
  flex: 1;
}

.contact-qr-title {
  font-family: 'Noto Serif SC', serif;
  font-size: 17px;
  font-weight: 700;
  color: var(--tea-dark);
  margin-bottom: 8px;
  letter-spacing: 2px;
}

.contact-qr-phone {
  font-size: 20px;
  font-weight: 700;
  color: var(--amber-dark);
  letter-spacing: 1px;
}

@media (max-width: 900px) {
  .contact-qr {
    flex-direction: column;
    text-align: center;
    gap: 16px;
  }
}

.contact-form {
  background: var(--white);
  padding: 48px 44px;
  box-shadow: var(--shadow-md);
  position: relative;
}

.contact-form::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 60px;
  height: 4px;
  background: var(--amber);
}

.contact-form-title {
  font-family: 'Noto Serif SC', serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--tea-dark);
  margin-bottom: 8px;
  letter-spacing: 2px;
}

.contact-form-subtitle {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 32px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--tea-dark);
  margin-bottom: 8px;
  letter-spacing: 1px;
}

.form-group label span {
  color: var(--amber-dark);
  margin-left: 2px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid rgba(201,169,110,0.25);
  background: var(--paper);
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 14px;
  color: var(--text-dark);
  transition: var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--amber);
  background: var(--white);
  box-shadow: 0 0 0 3px rgba(201,169,110,0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-group select {
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238B7D6B' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

.form-submit {
  width: 100%;
  padding: 16px;
  background: var(--tea-dark);
  color: var(--paper);
  border: none;
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 4px;
  cursor: pointer;
  transition: var(--transition);
  margin-top: 8px;
}

.form-submit:hover {
  background: var(--tea-green);
  letter-spacing: 6px;
}

@media (max-width: 900px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 50px;
  }
  .contact-form {
    padding: 36px 28px;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
}

/* ===== Footer ===== */
.footer {
  background: var(--tea-dark);
  padding: 70px 0 30px;
  position: relative;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 50px;
  margin-bottom: 50px;
}

.footer-brand-logo {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.footer-brand-seal {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  object-fit: contain;
  background: var(--white);
  flex-shrink: 0;
}

.footer-brand-name {
  font-family: 'Noto Serif SC', serif;
  font-size: 24px;
  font-weight: 700;
  color: var(--paper);
  letter-spacing: 4px;
}

.footer-brand-desc {
  font-size: 13px;
  color: rgba(245,240,232,0.5);
  line-height: 2;
  margin-bottom: 24px;
}

.footer-col h4 {
  font-family: 'Noto Serif SC', serif;
  font-size: 16px;
  font-weight: 600;
  color: var(--paper);
  margin-bottom: 24px;
  letter-spacing: 2px;
  position: relative;
  padding-bottom: 12px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--amber);
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  font-size: 13px;
  color: rgba(245,240,232,0.5);
  transition: var(--transition);
}

.footer-col ul li a:hover {
  color: var(--amber);
  padding-left: 4px;
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(245,240,232,0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom p {
  font-size: 12px;
  color: rgba(245,240,232,0.35);
  letter-spacing: 1px;
}

.footer-bottom-links {
  display: flex;
  gap: 24px;
}

.footer-bottom-links a {
  font-size: 12px;
  color: rgba(245,240,232,0.35);
}

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

@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}

@media (max-width: 600px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* ===== Scroll Reveal Animation ===== */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ===== Back to Top ===== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  background: var(--tea-dark);
  border: 1px solid var(--amber);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--amber);
  transform: translateY(-3px);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
  stroke: var(--amber);
  fill: none;
  stroke-width: 2;
  transition: var(--transition);
}

.back-to-top:hover svg {
  stroke: var(--white);
}