/* ===== Google Fonts ===== */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:opsz,wght@9..40,400;9..40,500;9..40,600;9..40,700;9..40,800;9..40,900&family=Space+Grotesk:wght@400;500;600;700&display=swap');

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

:root {
  --ink: #1C1917;
  --green: #2D6A4F;
  --green-light: #40916C;
  --terracotta: #DA7B4A;
  --terracotta-dark: #C56A3A;
  --gold: #E8B44F;
  --cream: #FEFAF5;
  --cream-dark: #F6EEE2;
  --warm-white: #FFFDF9;
  --white: #FFFFFF;
  --sand: #E6DDD2;
  --muted: #8D7B68;
  --radius: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --gap: clamp(20px, 4vw, 48px);
}

html { scroll-behavior: smooth; }
body {
  font-family: 'DM Sans', 'Space Grotesk', -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--cream);
  color: var(--ink);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

:focus-visible { outline: 2px solid var(--terracotta); outline-offset: 3px; border-radius: 4px; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1 !important; transform: none !important; }
}

/* ===== Keyframes ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(32px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInLeft {
  from { opacity: 0; transform: translateX(-24px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(24px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.94); }
  to   { opacity: 1; transform: scale(1); }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}

/* Scroll reveal base */
.reveal { opacity: 0; }
.reveal.revealed { animation: fadeInUp 0.7s cubic-bezier(0.16,1,0.3,1) forwards; }
.reveal-left  { opacity: 0; }
.reveal-left.revealed  { animation: fadeInLeft 0.7s cubic-bezier(0.16,1,0.3,1) forwards; }
.reveal-right { opacity: 0; }
.reveal-right.revealed { animation: fadeInRight 0.7s cubic-bezier(0.16,1,0.3,1) forwards; }
.reveal-scale { opacity: 0; }
.reveal-scale.revealed { animation: scaleIn 0.6s cubic-bezier(0.16,1,0.3,1) forwards; }

/* Staggered delays */
.delay-1 { animation-delay: 0.05s !important; }
.delay-2 { animation-delay: 0.1s !important; }
.delay-3 { animation-delay: 0.15s !important; }
.delay-4 { animation-delay: 0.2s !important; }
.delay-5 { animation-delay: 0.25s !important; }
.delay-6 { animation-delay: 0.3s !important; }

/* ===== Nav ===== */
nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(254,250,245,0.94);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--sand);
  transition: transform 0.35s cubic-bezier(0.16,1,0.3,1), box-shadow 0.3s;
}
nav.nav-scrolled { box-shadow: 0 1px 20px rgba(28,25,23,0.06); }
nav .nav-inner {
  max-width: 1300px; margin: 0 auto; padding: 14px clamp(16px, 4vw, 40px);
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px;
}
/* Logo */
.nav-logo {
  display: flex; align-items: center; gap: 8px; text-decoration: none;
}
.nav-logo svg { width: 36px; height: 36px; flex-shrink: 0; }
.nav-logo .logo-text {
  font-size: 1.25rem; font-weight: 900;
  background: linear-gradient(135deg, var(--terracotta), var(--green));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
nav .nav-links { display: flex; gap: 4px; }
nav .nav-links a {
  color: var(--terracotta-dark); text-decoration: none; padding: 8px 18px;
  font-weight: 600; border-radius: 24px; transition: all 0.25s;
  font-size: 0.88rem;
}
nav .nav-links a:hover, nav .nav-links a.active { color: var(--terracotta); background: #FFF0EB; }
.lang-switch { display: flex; border: 2px solid var(--sand); border-radius: 24px; overflow: hidden; }
.lang-switch button {
  padding: 6px 18px; border: none; background: transparent;
  cursor: pointer; font-size: 0.78rem; font-weight: 700;
  color: var(--muted); transition: all 0.25s; font-family: inherit;
}
.lang-switch button.active { background: var(--ink); color: #fff; }
/* Mobile hamburger */
.hamburger { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.hamburger span {
  display: block; width: 24px; height: 2.5px; background: var(--ink);
  margin: 5px 0; border-radius: 2px; transition: all 0.3s;
}
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ===== Main ===== */
main { flex: 1; }

/* ===== Hero ===== */
.hero {
  display: grid; grid-template-columns: 1fr 1fr;
  min-height: 85vh; align-items: center; padding: 0;
}
.hero-text {
  padding: clamp(40px, 8vw, 100px) clamp(24px, 6vw, 80px);
  display: flex; flex-direction: column; justify-content: center;
}
.hero-eyebrow {
  font-family: 'Space Grotesk', monospace;
  font-size: 0.78rem; font-weight: 700; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--terracotta); margin-bottom: 20px;
}
.hero-text h1 {
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  font-weight: 900; line-height: 1.06; color: var(--ink);
  margin-bottom: 24px; letter-spacing: -0.03em;
}
.hero-text h1 .highlight {
  display: inline-block;
  background: linear-gradient(135deg, var(--terracotta), var(--green));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-text .subtitle {
  font-size: 1.1rem; color: var(--muted); max-width: 460px;
  margin-bottom: 36px; line-height: 1.7;
}
.hero-stats-row { display: flex; gap: 40px; margin-top: 16px; flex-wrap: wrap; }
.hero-stats-row .stat b { font-size: 2rem; font-weight: 900; color: var(--terracotta); display: block; }
.hero-stats-row .stat span { font-size: 0.82rem; color: var(--muted); font-weight: 600; }
.hero-visual {
  height: 100%; min-height: 400px; position: relative; overflow: hidden;
}
.hero-visual img {
  width: 100%; height: 100%; object-fit: cover;
  border-radius: 0 0 0 var(--radius-xl);
  transition: transform 0.6s cubic-bezier(0.16,1,0.3,1);
}
.hero-visual:hover img { transform: scale(1.03); }
.hero-visual .floating-badge {
  position: absolute; bottom: 40px; left: -20px;
  background: var(--white); padding: 16px 24px; border-radius: var(--radius);
  box-shadow: 0 12px 40px rgba(28,25,23,0.1);
  font-weight: 800; font-size: 0.9rem; color: var(--ink);
  animation: float 4s ease-in-out infinite;
}
.hero-visual .floating-badge span:first-child { color: var(--gold); }

/* ===== Section Headers ===== */
.page-section { padding: clamp(60px, 10vw, 120px) clamp(16px, 4vw, 40px); }
.page-section .container { max-width: 1300px; margin: 0 auto; }
.section-header { margin-bottom: 64px; }
.section-header .section-label {
  font-family: 'Space Grotesk', monospace;
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--terracotta); margin-bottom: 12px;
}
.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900; line-height: 1.1; color: var(--ink);
  max-width: 700px; letter-spacing: -0.02em;
}
.section-header.center { text-align: center; }
.section-header.center h2 { margin: 0 auto; }

/* ===== Products — Alternating Cards ===== */
.product-row {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: var(--gap); align-items: center;
  margin-bottom: clamp(40px, 6vw, 80px);
}
.product-row:last-child { margin-bottom: 0; }
.product-row.reverse { direction: rtl; }
.product-row.reverse .product-info { direction: ltr; }
.product-row .product-visual {
  direction: ltr; position: relative;
  border-radius: var(--radius-xl); overflow: hidden;
}
.product-row .product-visual img {
  width: 100%; height: 380px; object-fit: cover;
  border-radius: var(--radius-xl);
  transition: transform 0.5s cubic-bezier(0.16,1,0.3,1);
}
.product-row .product-visual:hover img { transform: scale(1.04); }
.product-row .product-visual .tag {
  position: absolute; top: 20px; left: 20px;
  background: var(--white); padding: 6px 16px; border-radius: 20px;
  font-size: 0.78rem; font-weight: 700; color: var(--terracotta);
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
}
.product-info { padding: 20px 0; }
.product-info .product-number {
  font-family: 'Space Grotesk', monospace;
  font-size: 3.5rem; font-weight: 900; color: var(--sand);
  line-height: 1; margin-bottom: -6px;
}
.product-info h3 {
  font-size: clamp(1.3rem, 2vw, 1.8rem);
  font-weight: 900; margin-bottom: 10px; color: var(--ink);
}
.product-info .desc { color: var(--muted); font-size: 0.98rem; line-height: 1.7; margin-bottom: 18px; }
.product-info .price-row {
  display: flex; align-items: center; gap: 14px; margin-bottom: 20px; flex-wrap: wrap;
}
.product-info .price-tag { font-size: 1.5rem; font-weight: 900; color: var(--terracotta); }
.product-info .price-tag small { font-size: 0.8rem; color: var(--muted); font-weight: 500; }
.product-info .moq-tag {
  display: inline-block; background: #FFF0EB; color: var(--terracotta);
  padding: 4px 14px; border-radius: 8px; font-size: 0.78rem; font-weight: 700;
}
.product-info .btn-order {
  display: inline-block; padding: 14px 36px;
  background: var(--ink); color: #fff; border-radius: 30px;
  font-size: 0.95rem; font-weight: 700; text-decoration: none;
  transition: all 0.25s;
}
.product-info .btn-order:hover { background: var(--terracotta); transform: translateX(4px); }

/* ===== Features ===== */
.features-creative {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 0; border-top: 1px solid var(--sand);
}
.feature-item {
  padding: 48px 36px; border-bottom: 1px solid var(--sand);
  border-right: 1px solid var(--sand);
  transition: background 0.25s, transform 0.25s;
}
.feature-item:nth-child(3n) { border-right: none; }
.feature-item:hover { background: var(--warm-white); transform: scale(1.02); }
.feature-item .feat-num {
  font-family: 'Space Grotesk', monospace;
  font-size: 4rem; font-weight: 900; color: var(--sand);
  line-height: 1; margin-bottom: 10px;
}
.feature-item h3 { font-size: 1.2rem; font-weight: 800; margin-bottom: 8px; color: var(--ink); }
.feature-item p { color: var(--muted); font-size: 0.93rem; line-height: 1.6; }

/* ===== Process Timeline ===== */
.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
}
.process-step {
  text-align: center; padding: 40px 24px;
  background: var(--white); border-radius: var(--radius-lg);
  border: 1px solid var(--sand); position: relative;
  transition: transform 0.25s, box-shadow 0.25s;
}
.process-step:hover { transform: translateY(-6px); box-shadow: 0 16px 48px rgba(28,25,23,0.08); }
.process-step .step-icon {
  width: 64px; height: 64px; margin: 0 auto 20px;
  background: linear-gradient(135deg, #EDF5F0, #F0F7F2);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 1.8rem;
}
.process-step .step-num {
  font-family: 'Space Grotesk', monospace;
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.12em;
  color: var(--terracotta); margin-bottom: 8px; text-transform: uppercase;
}
.process-step h4 { font-size: 1.05rem; font-weight: 800; color: var(--ink); margin-bottom: 6px; }
.process-step p { font-size: 0.88rem; color: var(--muted); }

/* ===== Order Page ===== */
.order-layout {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: var(--gap); align-items: start;
  max-width: 1300px; margin: 0 auto;
}
.order-image img {
  width: 100%; border-radius: var(--radius-xl);
  box-shadow: 0 12px 40px rgba(28,25,23,0.08);
  transition: transform 0.4s ease;
}
.order-image img:hover { transform: scale(1.02); }
.price-preview {
  background: var(--ink); border-radius: var(--radius-lg);
  padding: 28px 24px; text-align: center; margin-top: 20px;
}
.price-preview .est { font-size: 0.8rem; color: rgba(255,255,255,0.5); font-weight: 500; }
.price-preview .num { font-size: 2rem; font-weight: 900; color: var(--gold); margin: 6px 0; }
.price-preview .unit { font-size: 0.8rem; color: rgba(255,255,255,0.45); }

.form-wrapper {
  background: var(--white); border-radius: var(--radius-xl);
  padding: 48px 44px; box-shadow: 0 4px 24px rgba(28,25,23,0.04);
  border: 1px solid var(--sand);
}
.form-wrapper h3 { font-size: 1.35rem; font-weight: 900; margin-bottom: 32px; color: var(--ink); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-weight: 700; margin-bottom: 8px; font-size: 0.85rem; color: var(--terracotta-dark); }
.form-group label .required { color: var(--terracotta); }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 12px 16px;
  border: 2px solid var(--sand); border-radius: var(--radius);
  font-size: 0.95rem; font-family: inherit;
  transition: all 0.25s; background: #FDFAF7; color: var(--ink);
}
.form-group input::placeholder, .form-group textarea::placeholder { color: #C4B8A8; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--green);
  box-shadow: 0 0 0 4px rgba(45,106,79,0.08);
}
.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238D7B68' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 14px center; padding-right: 36px;
}
.form-group textarea { resize: vertical; }

.payment-options { display: flex; gap: 10px; flex-wrap: wrap; }
.payment-option { flex: 1; min-width: 85px; }
.payment-option input { display: none; }
.payment-option label {
  display: block; text-align: center; padding: 14px 8px;
  border: 2px solid var(--sand); border-radius: var(--radius);
  cursor: pointer; transition: all 0.25s; font-size: 0.85rem;
  background: #FDFAF7; font-weight: 600; color: var(--ink);
}
.payment-option label:hover { border-color: var(--green); background: #EDF5F0; }
.payment-option input:checked + label {
  border-color: var(--green); background: #EDF5F0; font-weight: 700;
  color: var(--green);
}

.address-section { margin-top: 28px; padding-top: 24px; border-top: 2px solid var(--sand); }
.address-section h4 { font-size: 1.05rem; font-weight: 800; margin-bottom: 20px; color: var(--ink); }

.btn-submit {
  width: 100%; padding: 16px;
  background: var(--ink); color: #fff; border: none; border-radius: 30px;
  font-size: 1.1rem; font-weight: 800; cursor: pointer;
  transition: all 0.25s; font-family: inherit;
}
.btn-submit:hover { background: var(--terracotta); transform: translateY(-2px); }

.btn-cta {
  display: inline-block; padding: 16px 44px;
  background: var(--ink); color: #fff; border-radius: 30px;
  font-size: 1rem; font-weight: 800; text-decoration: none;
  transition: all 0.25s;
}
.btn-cta:hover { background: var(--terracotta); transform: translateX(4px); }

/* ===== Category Tags ===== */
.category-cloud {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-bottom: 48px;
}
.category-tag {
  padding: 10px 22px; background: var(--white); border: 1.5px solid var(--sand);
  border-radius: 24px; font-weight: 700; font-size: 0.88rem;
  color: var(--terracotta-dark); transition: all 0.25s; cursor: pointer;
}
.category-tag:hover { border-color: var(--green); background: var(--cream-dark); transform: translateY(-2px); }

/* ===== Success Page ===== */
.success-box {
  text-align: center; padding: 72px 48px; max-width: 520px;
  margin: 100px auto;
  background: var(--white); border-radius: var(--radius-xl);
  box-shadow: 0 12px 40px rgba(28,25,23,0.08); border: 1px solid var(--sand);
}
.success-box .check { font-size: 4rem; margin-bottom: 16px; }
.success-box h2 { color: var(--green); font-size: 1.8rem; font-weight: 900; margin: 16px 0; }
.success-box p { color: var(--muted); margin-bottom: 10px; line-height: 1.8; }
.success-box .note {
  margin-top: 24px; padding-top: 24px; border-top: 1px solid var(--sand);
  font-size: 0.88rem; color: #B0A090;
}
.success-box a { color: var(--terracotta); text-decoration: none; font-weight: 700; }
.success-box a:hover { text-decoration: underline; }

/* ===== Footer ===== */
footer {
  text-align: center; padding: 48px 24px;
  color: var(--muted); font-size: 0.88rem;
  border-top: 1px solid var(--sand); background: var(--white);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hamburger { display: block; }
  nav .nav-links, nav .lang-switch { display: none; }
  nav .nav-links.open {
    display: flex; flex-direction: column; width: 100%;
    padding-top: 12px; gap: 4px;
  }
  nav .nav-links.open a { text-align: center; }
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-text { order: 1; padding: 48px 24px; }
  .hero-visual { order: 0; min-height: 260px; border-radius: 0 0 var(--radius-xl) var(--radius-xl); }
  .hero-visual img { border-radius: 0; }
  .hero-visual .floating-badge { left: 16px; bottom: 16px; }
  .product-row { grid-template-columns: 1fr; gap: 20px; }
  .product-row.reverse { direction: ltr; }
  .product-row .product-visual img { height: 220px; }
  .product-info .product-number { font-size: 2.2rem; }
  .order-layout { grid-template-columns: 1fr; }
  .order-image { display: none; }
  .feature-item { border-right: none; }
  .features-creative { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .hero-text h1 { font-size: 1.9rem; }
  .hero-stats-row { gap: 20px; }
  .hero-stats-row .stat b { font-size: 1.5rem; }
  .form-row { grid-template-columns: 1fr; }
  .form-wrapper { padding: 28px 18px; }
  .features-creative { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr 1fr; }
  .section-header { margin-bottom: 40px; }
}