/* ==========================================================================
   Antuosheng International Trading Co., Limited
   Homepage stylesheet — copper light theme
   ========================================================================== */

:root {
  --copper: #B87333;
  --copper-deep: #9A5B22;
  --copper-soft: #F3D9B0;
  --copper-dark: #2A1D10;
  --paper: #F7F6F2;
  --paper-warm: #F1EEE5;
  --ink: #1C1812;
  --ink-soft: #4B4236;
  --line: #E5DECD;
  --white: #FFFFFF;
}

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

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

body {
  font-size: 16px;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background-color: var(--paper);
  color: var(--ink);
  line-height: 1.65;
  overflow-x: hidden;
}

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

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

h1, h2, h3, h4 {
  line-height: 1.2;
  color: var(--ink);
  font-weight: 700;
}

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   Anchor navigation
   ========================================================================== */

.anchor-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--paper);
  border-bottom: 2px solid var(--copper);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.anchor-nav .nav-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
  height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand .wordmark {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: 0.5px;
}

.brand .wordmark span {
  color: var(--copper-deep);
}

/* CSS-drawn anchor mark */
.anchor-mark {
  position: relative;
  width: 40px;
  height: 40px;
  display: block;
}

.anchor-mark .ring {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 14px;
  height: 14px;
  border: 3px solid var(--copper-deep);
  border-radius: 50%;
}

.anchor-mark .stock {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  width: 26px;
  height: 3px;
  background-color: var(--copper);
  border-radius: 2px;
}

.anchor-mark .shank {
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 24px;
  background-color: var(--copper-deep);
  border-radius: 2px;
}

.anchor-mark .fluke {
  position: absolute;
  bottom: 2px;
  width: 15px;
  height: 15px;
  border: 3px solid var(--copper-deep);
  border-top: none;
}

.anchor-mark .fluke.left {
  left: 2px;
  border-radius: 0 0 0 15px;
  border-right: none;
}

.anchor-mark .fluke.right {
  right: 2px;
  border-radius: 0 0 15px 0;
  border-left: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
  list-style: none;
}

.nav-links a {
  color: var(--ink-soft);
  font-weight: 600;
  font-size: 0.95rem;
  position: relative;
  padding: 6px 0;
  transition: color 0.2s ease;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background-color: var(--copper);
  transition: width 0.2s ease;
}

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

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

.nav-cta {
  background-color: var(--copper);
  color: var(--white);
  padding: 11px 22px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 0.95rem;
  transition: background-color 0.2s ease;
  flex-shrink: 0;
}

.nav-cta:hover {
  background-color: var(--copper-deep);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.nav-toggle span {
  display: block;
  width: 26px;
  height: 3px;
  background-color: var(--ink);
  border-radius: 2px;
}

/* ==========================================================================
   Lighthouse hero
   ========================================================================== */

.lighthouse-hero {
  background-color: var(--paper-warm);
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}

.lighthouse-hero .hero-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 88px 24px 72px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-copy .eyebrow {
  display: inline-block;
  background-color: var(--copper-soft);
  color: var(--copper-dark);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 30px;
  margin-bottom: 20px;
}

.hero-copy h1 {
  font-size: 2.9rem;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero-copy h1 em {
  font-style: normal;
  color: var(--copper-deep);
}

.hero-copy .lede {
  font-size: 1.1rem;
  color: var(--ink-soft);
  margin-bottom: 30px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 0.95rem;
  transition: transform 0.15s ease, background-color 0.2s ease;
}

.btn-primary {
  background-color: var(--copper);
  color: var(--white);
}

.btn-primary:hover {
  background-color: var(--copper-deep);
  transform: translateY(-2px);
}

.btn-ghost {
  background-color: transparent;
  color: var(--copper-deep);
  border: 2px solid var(--copper);
}

.btn-ghost:hover {
  background-color: var(--copper-soft);
  transform: translateY(-2px);
}

/* CSS-drawn lighthouse */
.lighthouse {
  position: relative;
  height: 340px;
  display: flex;
  justify-content: center;
  align-items: flex-end;
}

.lighthouse .beam {
  position: absolute;
  top: 46px;
  right: 8px;
  width: 150px;
  height: 34px;
  background: linear-gradient(90deg, rgba(184, 115, 51, 0.9), rgba(243, 217, 176, 0));
  border-radius: 50%;
  transform-origin: left center;
  transform: rotate(-8deg);
}

.lighthouse .tower {
  position: relative;
  width: 92px;
  height: 210px;
  background: linear-gradient(to right, #C88A4A, #B87333 45%, #9A5B22);
  clip-path: polygon(18% 0, 82% 0, 100% 100%, 0 100%);
}

.lighthouse .stripe {
  position: absolute;
  left: 0;
  width: 100%;
  height: 22px;
  background-color: var(--white);
}

.lighthouse .stripe.one {
  top: 60px;
}

.lighthouse .stripe.two {
  top: 130px;
}

.lighthouse .gallery {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 14px;
  background-color: var(--copper-dark);
  border-radius: 3px;
  z-index: 2;
}

.lighthouse .gallery .rail {
  position: absolute;
  top: 4px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--copper-soft);
}

.lighthouse .lantern {
  position: absolute;
  top: -38px;
  left: 50%;
  transform: translateX(-50%);
  width: 56px;
  height: 46px;
  background: linear-gradient(#F3D9B0, #E4B77C);
  border: 3px solid var(--copper-dark);
  z-index: 3;
}

.lighthouse .lantern .glow {
  position: absolute;
  top: 8px;
  left: 8px;
  right: 8px;
  bottom: 8px;
  background: radial-gradient(circle, #FFF3DC, #F3D9B0);
  border-radius: 2px;
}

.lighthouse .dome {
  position: absolute;
  top: -54px;
  left: 50%;
  transform: translateX(-50%);
  width: 58px;
  height: 26px;
  background-color: var(--copper-dark);
  border-radius: 50% 50% 0 0;
  z-index: 4;
}

.lighthouse .base {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 54px;
  background-color: var(--copper-dark);
  border-radius: 50% 50% 0 0;
  clip-path: polygon(0 60%, 12% 20%, 24% 0, 38% 22%, 50% 8%, 62% 22%, 76% 0, 88% 20%, 100% 60%, 100% 100%, 0 100%);
}

/* ==========================================================================
   Statement row (full-width)
   ========================================================================== */

.statement-section {
  background-color: var(--copper-dark);
  color: var(--paper);
  padding: 88px 0;
}

.statement-section .container {
  max-width: 900px;
  text-align: center;
}

.statement-section h2 {
  color: var(--paper);
  font-size: 2.2rem;
  margin-bottom: 24px;
}

.statement-section p {
  font-size: 1.15rem;
  color: var(--copper-soft);
  line-height: 1.8;
}

.statement-section .rule {
  width: 70px;
  height: 4px;
  background-color: var(--copper);
  margin: 0 auto 32px;
  border-radius: 2px;
}

/* ==========================================================================
   Stat columns (big numerals)
   ========================================================================== */

.stats-section {
  padding: 80px 0;
}

.stats-section .container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.stat-card {
  text-align: center;
  padding: 36px 20px;
  border: 1px solid var(--line);
  border-top: 4px solid var(--copper);
  background-color: var(--white);
  border-radius: 6px;
}

.stat-card .num {
  font-size: 3rem;
  font-weight: 800;
  color: var(--copper-deep);
  line-height: 1;
  margin-bottom: 10px;
}

.stat-card .label {
  color: var(--ink-soft);
  font-weight: 600;
  font-size: 0.95rem;
}

/* ==========================================================================
   Numbered trade process
   ========================================================================== */

.process-section {
  background-color: var(--paper-warm);
  padding: 84px 0;
  border-top: 1px solid var(--line);
}

.section-head {
  text-align: center;
  margin-bottom: 56px;
}

.section-head .kicker {
  display: inline-block;
  color: var(--copper-deep);
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-size: 0.8rem;
  margin-bottom: 12px;
}

.section-head h2 {
  font-size: 2rem;
}

.section-head p {
  color: var(--ink-soft);
  max-width: 640px;
  margin: 14px auto 0;
}

.process-list {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  counter-reset: step;
  position: relative;
}

.process-step {
  position: relative;
  padding: 0 18px;
  text-align: center;
}

.process-step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background-color: var(--copper);
  color: var(--white);
  font-weight: 800;
  font-size: 1.1rem;
  position: relative;
  z-index: 2;
}

.process-step:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 30px;
  left: 50%;
  width: 100%;
  height: 2px;
  background-color: var(--copper-soft);
  z-index: 1;
}

.process-step h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.process-step p {
  font-size: 0.9rem;
  color: var(--ink-soft);
}

/* ==========================================================================
   Comparison table (two-column)
   ========================================================================== */

.compare-section {
  padding: 84px 0;
}

.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: stretch;
}

.compare-panel {
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 36px;
}

.compare-panel.highlight {
  border: 2px solid var(--copper);
  background-color: var(--paper);
  position: relative;
}

.compare-panel .tag {
  display: inline-block;
  background-color: var(--copper);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 14px;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.compare-panel h3 {
  font-size: 1.4rem;
  margin-bottom: 10px;
  color: var(--copper-deep);
}

.compare-panel p {
  color: var(--ink-soft);
  margin-bottom: 18px;
}

.compare-list {
  list-style: none;
}

.compare-list li {
  padding: 10px 0 10px 30px;
  position: relative;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line);
}

.compare-list li:last-child {
  border-bottom: none;
}

.compare-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 17px;
  width: 12px;
  height: 12px;
  background-color: var(--copper-soft);
  border-radius: 3px;
}

.compare-panel.highlight .compare-list li::before {
  background-color: var(--copper);
}

/* ==========================================================================
   Horizontal scroll product cards
   ========================================================================== */

.catalog-section {
  background-color: var(--paper-warm);
  padding: 84px 0;
  border-top: 1px solid var(--line);
}

.scroll-row {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  padding: 8px 4px 24px;
  scroll-snap-type: x mandatory;
}

.scroll-row::-webkit-scrollbar {
  height: 8px;
}

.scroll-row::-webkit-scrollbar-thumb {
  background-color: var(--copper);
  border-radius: 4px;
}

.catalog-card {
  flex: 0 0 300px;
  scroll-snap-align: start;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 28px;
  display: flex;
  flex-direction: column;
}

.catalog-card .card-icon {
  width: 56px;
  height: 56px;
  background-color: var(--copper-soft);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 18px;
}

.catalog-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.catalog-card p {
  color: var(--ink-soft);
  font-size: 0.92rem;
  flex-grow: 1;
  margin-bottom: 16px;
}

.catalog-card .card-link {
  color: var(--copper-deep);
  font-weight: 700;
  font-size: 0.9rem;
}

/* ==========================================================================
   Split CTA band
   ========================================================================== */

.cta-band {
  padding: 84px 0;
}

.cta-band .container {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
  background-color: var(--copper-dark);
  border-radius: 10px;
  padding: 56px 52px;
  color: var(--paper);
}

.cta-band h2 {
  color: var(--paper);
  font-size: 2rem;
  margin-bottom: 14px;
}

.cta-band p {
  color: var(--copper-soft);
  font-size: 1.05rem;
}

.cta-band .cta-side {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: flex-start;
}

.cta-band .btn-primary {
  background-color: var(--copper);
  color: var(--white);
  border: 2px solid var(--copper);
}

.cta-band .btn-primary:hover {
  background-color: var(--copper-deep);
}

.cta-band .btn-light {
  background-color: transparent;
  color: var(--paper);
  border: 2px solid var(--copper-soft);
}

/* ==========================================================================
   Contact section
   ========================================================================== */

.contact-section {
  padding: 84px 0;
  background-color: var(--paper-warm);
  border-top: 1px solid var(--line);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.contact-info h2 {
  font-size: 1.9rem;
  margin-bottom: 18px;
}

.contact-info p {
  color: var(--ink-soft);
  margin-bottom: 26px;
}

.contact-detail {
  margin-bottom: 16px;
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.contact-detail strong {
  color: var(--copper-deep);
  min-width: 90px;
}

.contact-detail span,
.contact-detail a {
  color: var(--ink);
}

.contact-form {
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 36px;
}

.contact-form label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--ink);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 4px;
  font-size: 1rem;
  font-family: inherit;
  margin-bottom: 18px;
  background-color: var(--paper);
  color: var(--ink);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid var(--copper);
  border-color: var(--copper);
}

.contact-form .btn {
  border: none;
  cursor: pointer;
  width: 100%;
}

.form-note {
  margin-top: 14px;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  background-color: var(--paper);
  border-top: 3px solid var(--copper);
  padding: 56px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-col h4 {
  font-size: 1rem;
  margin-bottom: 18px;
  color: var(--ink);
}

.footer-col p {
  color: var(--ink-soft);
  font-size: 0.92rem;
  margin-bottom: 14px;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul a {
  color: var(--ink-soft);
  font-size: 0.92rem;
  transition: color 0.2s ease;
}

.footer-col ul a:hover {
  color: var(--copper-deep);
}

.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 24px;
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.85rem;
}

/* ==========================================================================
   Scroll reveal
   ========================================================================== */

.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 980px) {
  .lighthouse-hero .hero-inner {
    grid-template-columns: 1fr;
    padding: 64px 24px 48px;
  }

  .lighthouse {
    height: 260px;
  }

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

  .process-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px 0;
  }

  .process-step:not(:last-child)::after {
    display: none;
  }

  .compare-grid,
  .contact-grid,
  .cta-band .container {
    grid-template-columns: 1fr;
  }

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

  .nav-links {
    display: none;
  }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 74px;
    left: 0;
    width: 100%;
    background-color: var(--paper);
    border-bottom: 2px solid var(--copper);
    padding: 20px 24px;
    gap: 16px;
    align-items: flex-start;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-cta {
    display: none;
  }
}

@media (max-width: 560px) {
  .hero-copy h1 {
    font-size: 2.1rem;
  }

  .stats-section .container {
    grid-template-columns: 1fr;
  }

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

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

  .cta-band .container {
    padding: 40px 28px;
  }
}