/* ============================================
   KANESHIGE鋳造所 - Heritage Forge Design
   ============================================ */

:root {
  --bronze: #2C1810;
  --bronze-light: #3D2B1F;
  --bronze-mid: #5C4033;
  --amber: #C9820A;
  --amber-light: #E5A730;
  --amber-glow: rgba(201, 130, 10, 0.15);
  --cream: #FFF8EC;
  --cream-dark: #F5EDDE;
  --text: #2C1810;
  --text-light: #6B5B4F;
  --white: #FFFFFF;
  --shadow: 0 4px 24px rgba(44, 24, 16, 0.1);
  --shadow-lg: 0 12px 48px rgba(44, 24, 16, 0.15);
  --radius: 8px;
  --radius-lg: 16px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: 'Noto Sans JP', sans-serif;
  color: var(--text);
  background: var(--cream);
  line-height: 1.8;
  font-weight: 400;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: var(--transition); }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.pc-only { display: inline; }

/* ---- Sample Banner ---- */
.sample-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  background: var(--amber);
  color: var(--white);
  text-align: center;
  font-size: 0.8rem;
  font-weight: 500;
  padding: 6px 16px;
  letter-spacing: 0.05em;
}
.sample-banner a { color: var(--white); text-decoration: underline; }

/* ---- Header ---- */
.header {
  position: fixed;
  top: 30px;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 248, 236, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(201, 130, 10, 0.12);
  transition: var(--transition);
}
.header.scrolled {
  background: rgba(255, 248, 236, 0.97);
  box-shadow: 0 2px 20px rgba(44, 24, 16, 0.08);
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-en {
  font-family: 'Playfair Display', serif;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--bronze);
  letter-spacing: 0.08em;
}
.logo-jp {
  font-family: 'Shippori Mincho', serif;
  font-size: 0.7rem;
  color: var(--text-light);
  letter-spacing: 0.15em;
}

.nav-desktop { display: flex; align-items: center; gap: 28px; }
.nav-desktop a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-light);
  position: relative;
}
.nav-desktop a:hover { color: var(--amber); }
.nav-desktop a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--amber);
  transition: var(--transition);
}
.nav-desktop a:hover::after { width: 100%; }
.nav-cta {
  background: var(--amber) !important;
  color: var(--white) !important;
  padding: 8px 20px;
  border-radius: 6px;
  font-weight: 500 !important;
}
.nav-cta::after { display: none !important; }
.nav-cta:hover { background: var(--amber-light) !important; }

/* Hamburger */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 32px;
  height: 24px;
  position: relative;
  z-index: 1100;
}
.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--bronze);
  position: absolute;
  left: 0;
  transition: var(--transition);
}
.hamburger span:nth-child(1) { top: 0; }
.hamburger span:nth-child(2) { top: 50%; transform: translateY(-50%); }
.hamburger span:nth-child(3) { bottom: 0; }
.hamburger.active span:nth-child(1) { top: 50%; transform: translateY(-50%) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { bottom: 50%; transform: translateY(50%) rotate(-45deg); }

/* Mobile Nav */
.mobile-nav {
  position: fixed;
  top: 0;
  right: -100%;
  width: 80%;
  max-width: 360px;
  height: 100vh;
  background: var(--bronze);
  z-index: 1050;
  transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  overflow-y: auto;
}
.mobile-nav.active { right: 0; }
.mobile-nav-inner {
  padding: 100px 32px 40px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.mobile-nav-link {
  display: block;
  padding: 16px 0;
  font-size: 1rem;
  color: var(--cream);
  border-bottom: 1px solid rgba(201, 130, 10, 0.2);
  font-weight: 400;
}
.mobile-nav-link:hover { color: var(--amber); }
.mobile-nav-cta {
  margin-top: 16px;
  background: var(--amber);
  text-align: center;
  padding: 16px !important;
  border-radius: var(--radius);
  border-bottom: none !important;
  font-weight: 500;
}

.mobile-overlay {
  position: fixed;
  inset: 0;
  background: rgba(44, 24, 16, 0.6);
  z-index: 1040;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}
.mobile-overlay.active { opacity: 1; visibility: visible; }

/* ---- Hero ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 98px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
}
.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(44, 24, 16, 0.85) 0%,
    rgba(44, 24, 16, 0.6) 50%,
    rgba(44, 24, 16, 0.75) 100%
  );
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--cream);
  padding: 0 24px;
}
.hero-sub {
  font-family: 'Shippori Mincho', serif;
  font-size: 0.95rem;
  letter-spacing: 0.2em;
  margin-bottom: 20px;
  color: var(--amber-light);
}
.hero-title {
  font-family: 'Shippori Mincho', serif;
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 24px;
  letter-spacing: 0.05em;
}
.hero-accent {
  color: var(--amber);
  display: inline-block;
}
.hero-desc {
  font-size: 1rem;
  line-height: 2;
  margin-bottom: 36px;
  color: rgba(255, 248, 236, 0.85);
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}
.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  letter-spacing: 0.05em;
}
.btn-primary {
  background: var(--amber);
  color: var(--white);
}
.btn-primary:hover {
  background: var(--amber-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(201, 130, 10, 0.3);
}
.btn-ghost {
  border: 1.5px solid rgba(255, 248, 236, 0.4);
  color: var(--cream);
  background: transparent;
}
.btn-ghost:hover {
  border-color: var(--amber);
  color: var(--amber);
  background: rgba(201, 130, 10, 0.1);
}
.btn-full { width: 100%; }

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--cream);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  opacity: 0.6;
}
.scroll-line {
  width: 1px;
  height: 40px;
  background: var(--cream);
  animation: scrollDown 1.5s ease-in-out infinite;
}
@keyframes scrollDown {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ---- Sections ---- */
.section {
  padding: 100px 0;
}
.section-label {
  font-family: 'Playfair Display', serif;
  font-size: 0.8rem;
  color: var(--amber);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-title {
  font-family: 'Shippori Mincho', serif;
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 16px;
  color: var(--bronze);
}
.section-lead {
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 2;
  margin-bottom: 48px;
  max-width: 600px;
}

/* ---- About / Timeline ---- */
.about { background: var(--white); }

.timeline {
  position: relative;
  padding-left: 40px;
  max-width: 700px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--amber), var(--amber-light));
}
.timeline-item {
  position: relative;
  padding-bottom: 40px;
}
.timeline-item:last-child { padding-bottom: 0; }
.timeline-dot {
  position: absolute;
  left: -36px;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--cream);
  border: 3px solid var(--amber);
}
.timeline-year {
  font-family: 'Playfair Display', serif;
  font-size: 0.85rem;
  color: var(--amber);
  font-weight: 600;
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}
.timeline-content h3 {
  font-family: 'Shippori Mincho', serif;
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--bronze);
}
.timeline-content p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.8;
}

/* ---- Methods ---- */
.methods { background: var(--cream); }

.methods-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.method-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(201, 130, 10, 0.08);
  transition: var(--transition);
}
.method-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(201, 130, 10, 0.2);
}
.method-svg {
  display: flex;
  justify-content: center;
  margin-bottom: 24px;
}
.method-name {
  font-family: 'Shippori Mincho', serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--bronze);
  margin-bottom: 2px;
}
.method-en {
  font-family: 'Playfair Display', serif;
  font-size: 0.75rem;
  color: var(--amber);
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}
.method-desc {
  font-size: 0.88rem;
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 16px;
}
.method-features {
  list-style: none;
}
.method-features li {
  font-size: 0.85rem;
  color: var(--text);
  padding: 6px 0;
  padding-left: 20px;
  position: relative;
  border-bottom: 1px solid rgba(201, 130, 10, 0.08);
}
.method-features li:last-child { border-bottom: none; }
.method-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 13px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--amber);
  opacity: 0.6;
}

/* ---- Materials ---- */
.materials { background: var(--white); }

.materials-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}
.material-item {
  text-align: center;
  padding: 28px 16px;
  border-radius: var(--radius-lg);
  background: var(--cream);
  border: 1px solid rgba(201, 130, 10, 0.08);
  transition: var(--transition);
}
.material-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: rgba(201, 130, 10, 0.2);
}
.material-icon {
  display: flex;
  justify-content: center;
  margin-bottom: 14px;
}
.material-item h3 {
  font-family: 'Shippori Mincho', serif;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--bronze);
  margin-bottom: 4px;
}
.material-types {
  font-size: 0.72rem;
  color: var(--amber);
  margin-bottom: 8px;
  letter-spacing: 0.03em;
}
.material-desc {
  font-size: 0.8rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* ---- Strength Banner ---- */
.strength {
  background: linear-gradient(135deg, var(--bronze) 0%, var(--bronze-light) 100%);
  padding: 72px 0;
}
.strength-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.strength-item {
  text-align: center;
  padding: 32px 24px;
  border-radius: var(--radius-lg);
  background: rgba(201, 130, 10, 0.06);
  border: 1px solid rgba(201, 130, 10, 0.12);
}
.strength-num {
  display: flex;
  justify-content: center;
  margin-bottom: 16px;
}
.strength-item h3 {
  font-family: 'Shippori Mincho', serif;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--amber);
  margin-bottom: 8px;
}
.strength-item p {
  font-size: 0.88rem;
  color: rgba(255, 248, 236, 0.75);
  line-height: 1.8;
}

/* ---- Works ---- */
.works { background: var(--cream); }

.works-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.work-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  background: var(--cream);
  transition: var(--transition);
}
.work-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.work-img {
  aspect-ratio: 4/3;
  overflow: hidden;
}
.work-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.work-card:hover .work-img img { transform: scale(1.06); }
.work-info { padding: 24px; }
.work-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--amber);
  background: var(--amber-glow);
  padding: 3px 12px;
  border-radius: 20px;
  margin-bottom: 8px;
  letter-spacing: 0.05em;
}
.work-info h3 {
  font-family: 'Shippori Mincho', serif;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--bronze);
  margin-bottom: 6px;
}
.work-info p {
  font-size: 0.85rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* ---- Numbers ---- */
.numbers {
  background: var(--bronze);
  color: var(--cream);
}
.numbers .section-label { color: var(--amber-light); }
.numbers .section-title { color: var(--cream); }

.numbers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}
.number-item {
  padding: 32px 16px;
  border-radius: var(--radius-lg);
  background: rgba(201, 130, 10, 0.08);
  border: 1px solid rgba(201, 130, 10, 0.15);
}
.number-value {
  font-family: 'Playfair Display', serif;
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--amber);
  line-height: 1.2;
  margin-bottom: 4px;
}
.number-unit {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 1rem;
  font-weight: 400;
  margin-left: 2px;
}
.number-label {
  font-size: 0.85rem;
  color: rgba(255, 248, 236, 0.7);
}

/* ---- Flow ---- */
.flow { background: var(--cream); }

.flow-steps {
  max-width: 740px;
}
.flow-step {
  display: flex;
  gap: 28px;
  padding: 32px 0;
  border-bottom: 1px solid rgba(201, 130, 10, 0.12);
  align-items: flex-start;
}
.flow-step:last-child { border-bottom: none; }
.flow-num {
  font-family: 'Playfair Display', serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--amber);
  opacity: 0.5;
  min-width: 56px;
  line-height: 1;
  padding-top: 4px;
}
.flow-body h3 {
  font-family: 'Shippori Mincho', serif;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--bronze);
  margin-bottom: 6px;
}
.flow-body p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.8;
}

/* ---- Company ---- */
.company { background: var(--white); }

.company-table {
  max-width: 800px;
}
.company-row {
  display: flex;
  border-bottom: 1px solid rgba(201, 130, 10, 0.1);
}
.company-th {
  width: 160px;
  min-width: 160px;
  padding: 16px 20px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--bronze);
  background: var(--amber-glow);
}
.company-td {
  padding: 16px 20px;
  font-size: 0.88rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* ---- Contact ---- */
.contact { background: var(--cream); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.contact-info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.contact-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow);
}
.contact-card-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--amber-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.contact-card-label {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-bottom: 2px;
}
.contact-card-value {
  font-family: 'Playfair Display', serif;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--bronze);
}
.contact-card-note {
  font-size: 0.78rem;
  color: var(--text-light);
  margin-top: 2px;
}

.contact-form {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow);
}
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--bronze);
  margin-bottom: 6px;
}
.req {
  font-size: 0.7rem;
  color: var(--white);
  background: var(--amber);
  padding: 1px 6px;
  border-radius: 3px;
  margin-left: 6px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid rgba(201, 130, 10, 0.15);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-family: 'Noto Sans JP', sans-serif;
  background: var(--cream);
  color: var(--text);
  transition: var(--transition);
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--amber);
  box-shadow: 0 0 0 3px rgba(201, 130, 10, 0.1);
}
.form-group textarea { resize: vertical; }

/* ---- Footer ---- */
.footer {
  background: var(--bronze);
  color: var(--cream);
  padding: 48px 0 24px;
}
.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(201, 130, 10, 0.15);
  margin-bottom: 24px;
  gap: 32px;
}
.footer-brand {
  display: flex;
  gap: 12px;
  align-items: center;
}
.footer-name {
  font-family: 'Shippori Mincho', serif;
  font-size: 1rem;
  font-weight: 600;
}
.footer-addr {
  font-size: 0.78rem;
  color: rgba(255, 248, 236, 0.6);
  margin-top: 2px;
}
.footer-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-links a {
  font-size: 0.82rem;
  color: rgba(255, 248, 236, 0.6);
}
.footer-links a:hover { color: var(--amber); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: rgba(255, 248, 236, 0.4);
}
.footer-credit a {
  color: var(--amber);
  opacity: 0.8;
}
.footer-credit a:hover { opacity: 1; }

/* ---- CTA Band ---- */
.cta-band {
  background: var(--amber);
  padding: 48px 0;
  text-align: center;
}
.cta-band h2 {
  font-family: 'Shippori Mincho', serif;
  font-size: 1.5rem;
  color: var(--white);
  margin-bottom: 8px;
}
.cta-band p {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 20px;
}
.cta-band .btn {
  background: var(--white);
  color: var(--amber);
  font-weight: 600;
}
.cta-band .btn:hover {
  background: var(--cream);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

/* ---- Selection highlight ---- */
::selection {
  background: var(--amber);
  color: var(--white);
}
::-moz-selection {
  background: var(--amber);
  color: var(--white);
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--cream);
}
::-webkit-scrollbar-thumb {
  background: var(--amber);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--amber-light);
}

/* ---- Form placeholder ---- */
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(44, 24, 16, 0.3);
}

/* ---- Loading state ---- */
.hero-bg img {
  transition: transform 0.3s ease;
}

/* ---- Focus styles for accessibility ---- */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

/* ---- Print ---- */
@media print {
  .sample-banner,
  .header,
  .hero-scroll,
  .hamburger,
  .mobile-nav,
  .mobile-overlay { display: none !important; }
  .hero { min-height: auto; padding: 40px 0; }
  .section { padding: 32px 0; }
  .fade-up { opacity: 1 !important; transform: none !important; }
}

/* ---- Animations ---- */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .methods-grid { grid-template-columns: 1fr 1fr; }
  .works-grid { grid-template-columns: 1fr 1fr; }
  .numbers-grid { grid-template-columns: repeat(2, 1fr); }
  .materials-grid { grid-template-columns: repeat(3, 1fr); }
  .strength-grid { grid-template-columns: repeat(3, 1fr); }
}

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

  .nav-desktop { display: none; }
  .hamburger { display: block; }

  .header-inner { height: 60px; }
  .hero { min-height: 90vh; padding-top: 90px; }
  .hero-title { font-size: 2rem; }
  .hero-desc { font-size: 0.9rem; }

  .section { padding: 72px 0; }
  .section-lead { margin-bottom: 36px; }

  .methods-grid { grid-template-columns: 1fr; gap: 20px; }
  .works-grid { grid-template-columns: 1fr; gap: 20px; }
  .numbers-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .materials-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .strength-grid { grid-template-columns: 1fr; gap: 20px; }
  .strength { padding: 56px 0; }
  .number-value { font-size: 2.2rem; }

  .contact-grid { grid-template-columns: 1fr; }
  .contact-form { padding: 24px; }

  .company-row { flex-direction: column; }
  .company-th {
    width: 100%;
    min-width: auto;
    padding: 10px 16px;
  }
  .company-td { padding: 10px 16px; }

  .flow-step { gap: 16px; }
  .flow-num { font-size: 1.6rem; min-width: 44px; }

  .footer-top { flex-direction: column; }
  .footer-links { gap: 16px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }

  .timeline { padding-left: 32px; }
  .timeline-dot { left: -28px; width: 14px; height: 14px; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; width: 100%; padding: 0 16px; }
  .btn { width: 100%; justify-content: center; }
  .numbers-grid { grid-template-columns: 1fr 1fr; }
  .number-item { padding: 24px 12px; }
  .number-value { font-size: 1.8rem; }
}