/* ============================================
   CaseMe 国内品牌官网样式
   配色：纯黑 #111111 / 科技红 #E03C2B / 冷白 #F5F5F5
   字体：Poppins (英文/数字) + Noto Sans SC (中文标题) + Noto Serif SC (正文)
   风格：科技运动 — 干净利落，有力量感
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700;800&family=Noto+Sans+SC:wght@400;500;700;900&family=Noto+Serif+SC:wght@300;400;500&display=swap');

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

:root {
  --cm-black:    #111111;
  --cm-dark:     #0A0A0A;
  --cm-dark-2:   #1A1A1A;
  --cm-dark-3:   #242424;
  --cm-red:      #E03C2B;
  --cm-red-dark: #C0321C;
  --cm-red-light:#FF5A47;
  --cm-red-bg:   #FFF0EE;
  --cm-cream:    #F5F5F5;
  --cm-warm-50:  #FAFAFA;
  --cm-gray-800: #1C1C1C;
  --cm-gray-600: #4A4A4A;
  --cm-gray-400: #888888;
  --cm-gray-200: #D8D8D8;
  --cm-gray-100: #EFEFEF;
  --cm-white:    #FFFFFF;
  /* alias旧变量名，保持兼容 */
  --cm-gold-500: var(--cm-red);
  --cm-gold-400: var(--cm-red-light);
  --cm-gold-600: var(--cm-red-dark);
  --cm-gold-100: var(--cm-red-bg);
  --cm-brown-900:var(--cm-dark-2);
  --cm-brown-700:var(--cm-dark-3);

  --shadow-sm:  0 1px 4px rgba(13,13,13,0.06);
  --shadow:     0 4px 20px rgba(13,13,13,0.08);
  --shadow-md:  0 8px 40px rgba(13,13,13,0.10);
  --shadow-lg:  0 20px 60px rgba(13,13,13,0.15);
  --radius:     0px;
  --radius-btn: 2px;
  --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width:  1400px;
  --nav-height: 80px;
}

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

body {
  font-family: "Noto Sans SC", -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--cm-gray-800);
  line-height: 1.7;
  background: var(--cm-white);
}

a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 32px; }

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: "Poppins", "Noto Sans SC", -apple-system, sans-serif;
  font-weight: 700;
  letter-spacing: -0.01em;
}
h1 { font-size: 3.8rem; line-height: 1.05; }
h2 { font-size: 2.4rem; line-height: 1.15; }
h3 { font-size: 1.7rem; line-height: 1.25; }
h4 { font-size: 1.2rem; line-height: 1.35; }

.serif { font-family: "Noto Serif SC", Georgia, serif; }

.label {
  font-family: "Poppins", sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--cm-red);
}

.section-title { text-align: center; margin-bottom: 72px; }
.section-title .label { margin-bottom: 16px; }
.section-title h2 { margin-bottom: 20px; color: var(--cm-black); }
.section-title p {
  font-family: "Noto Serif SC", Georgia, serif;
  font-weight: 300;
  font-size: 1.05rem;
  color: var(--cm-gray-400);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.9;
  letter-spacing: 0.04em;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 40px;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: "Poppins", sans-serif;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  border-radius: var(--radius-btn);
}
.btn-primary {
  background: var(--cm-black);
  color: var(--cm-white);
  border-color: var(--cm-black);
}
.btn-primary:hover {
  background: var(--cm-brown-900);
  border-color: var(--cm-brown-900);
}
.btn-gold {
  background: var(--cm-gold-500);
  color: var(--cm-white);
  border-color: var(--cm-gold-500);
}
.btn-gold:hover {
  background: var(--cm-gold-600);
  border-color: var(--cm-gold-600);
  box-shadow: 0 6px 24px rgba(201,168,76,0.3);
}
.btn-outline {
  background: transparent;
  color: var(--cm-white);
  border-color: rgba(255,255,255,0.5);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--cm-white);
}
.btn-outline-dark {
  background: transparent;
  color: var(--cm-black);
  border-color: var(--cm-black);
}
.btn-outline-dark:hover {
  background: var(--cm-black);
  color: var(--cm-white);
}
.btn-lg { padding: 18px 52px; font-size: 0.9rem; }
.btn-sm { padding: 10px 28px; font-size: 0.78rem; }

/* --- Navigation --- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-height);
  transition: var(--transition);
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 14px;
  z-index: 1001;
}
.nav-logo-img {
  height: 36px;
  width: auto;
  display: block;
}
.navbar-transparent .nav-logo-img { filter: brightness(0) invert(1); }
.navbar-scrolled .nav-logo-img { filter: brightness(0); }
/* fallback text */
.nav-logo-text {
  font-family: "Poppins", sans-serif;
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.nav-logo-sub {
  font-family: "Poppins", sans-serif;
  font-size: 0.58rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  opacity: 0.5;
  display: block;
  line-height: 1;
  margin-top: 2px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-links a {
  font-family: "Poppins", sans-serif;
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 1px;
  background: var(--cm-gold-500);
  transition: var(--transition);
}
.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }
.nav-links .nav-cta { border: none; }
.nav-links .nav-cta::after { display: none; }

.navbar-transparent .nav-logo-text { color: var(--cm-white); }
.navbar-transparent .nav-logo-sub { color: rgba(255,255,255,0.6); }
.navbar-transparent .nav-links a { color: rgba(255,255,255,0.85); }
.navbar-transparent .nav-links a:hover { color: var(--cm-white); }

.navbar-scrolled {
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 rgba(0,0,0,0.06);
}
.navbar-scrolled .nav-logo-text { color: var(--cm-black); }
.navbar-scrolled .nav-logo-sub { color: var(--cm-gray-400); }
.navbar-scrolled .nav-links a { color: var(--cm-gray-600); }
.navbar-scrolled .nav-links a:hover { color: var(--cm-black); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  z-index: 1001;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 1.5px;
  background: var(--cm-white);
  transition: var(--transition);
}
.navbar-scrolled .nav-toggle span { background: var(--cm-black); }
.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--cm-dark);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('images/hero-bg.jpg');
  background-size: cover;
  background-position: center 30%;
  opacity: 0.45;
  transition: transform 0.1s linear;
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to right, rgba(10,10,10,0.92) 0%, rgba(10,10,10,0.75) 55%, rgba(10,10,10,0.3) 100%),
    linear-gradient(to top, rgba(10,10,10,0.6) 0%, transparent 50%);
  z-index: 1;
}
.hero .container {
  position: relative;
  z-index: 2;
  padding-top: 120px;
  padding-bottom: 80px;
}
.hero-content { max-width: 680px; }

.hero-slogan {
  font-family: "Poppins", sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.4em;
  color: var(--cm-red);
  text-transform: uppercase;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.hero-slogan::before {
  content: '';
  display: block;
  width: 40px; height: 2px;
  background: var(--cm-red);
  flex-shrink: 0;
}
.hero h1 {
  color: var(--cm-white);
  font-weight: 800;
  margin-bottom: 24px;
  font-size: 4.2rem;
  letter-spacing: -0.02em;
  line-height: 1.0;
}
.hero h1 em {
  font-style: normal;
  color: var(--cm-red);
}
.hero-desc {
  font-family: "Noto Serif SC", Georgia, serif;
  color: rgba(255,255,255,0.7);
  font-size: 1.02rem;
  font-weight: 300;
  line-height: 2;
  letter-spacing: 0.05em;
  max-width: 520px;
  margin-bottom: 32px;
}
.hero-tags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.hero-tags span {
  font-family: "Poppins", sans-serif;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  padding: 5px 14px;
  border: 1px solid rgba(224,60,43,0.45);
  background: rgba(224,60,43,0.1);
  color: rgba(255,255,255,0.85);
}
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-scroll {
  position: absolute;
  bottom: 40px; left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.35);
  font-family: "Poppins", sans-serif;
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  animation: scrollBounce 2.5s infinite;
}
.hero-scroll::after {
  content: '';
  width: 1px; height: 40px;
  background: linear-gradient(to bottom, rgba(224,60,43,0.7), transparent);
}
@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* --- Stats Strip --- */
.stats-strip {
  background: var(--cm-dark);
  padding: 36px 0;
  border-top: 3px solid var(--cm-red);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.stat-item {
  text-align: center;
  padding: 8px 24px;
  border-right: 1px solid rgba(255,255,255,0.06);
}
.stat-item:last-child { border-right: none; }
.stat-num {
  font-family: "Poppins", sans-serif;
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--cm-red);
  line-height: 1;
  margin-bottom: 6px;
  letter-spacing: -0.02em;
}
.stat-label {
  font-family: "Noto Sans SC", sans-serif;
  font-size: 0.8rem;
  font-weight: 400;
  color: rgba(255,255,255,0.45);
  letter-spacing: 0.04em;
}

/* --- Products Preview --- */
.products-section { padding: 120px 0; background: var(--cm-warm-50); }

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}
.product-card {
  position: relative;
  overflow: hidden;
  background: var(--cm-black);
  aspect-ratio: 3/4;
  cursor: pointer;
}
.product-card:first-child {
  grid-column: span 2;
  aspect-ratio: unset;
}
.product-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  filter: brightness(0.7);
}
.product-card:hover .product-card-img {
  transform: scale(1.05);
  filter: brightness(0.5);
}
.product-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13,13,13,0.85) 0%, transparent 55%);
  z-index: 1;
}
.product-card-info {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 32px;
  z-index: 2;
  transform: translateY(8px);
  transition: var(--transition);
}
.product-card:hover .product-card-info { transform: translateY(0); }
.product-card-cat {
  font-family: "Poppins", sans-serif;
  font-size: 0.68rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--cm-gold-400);
  margin-bottom: 8px;
}
.product-card-name {
  font-family: "Cormorant Garamond", serif;
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--cm-white);
  margin-bottom: 6px;
}
.product-card-desc {
  font-family: "Noto Serif SC", serif;
  font-size: 0.85rem;
  font-weight: 300;
  color: rgba(255,255,255,0.55);
  letter-spacing: 0.04em;
  line-height: 1.7;
  margin-bottom: 16px;
  opacity: 0;
  transition: var(--transition);
}
.product-card:hover .product-card-desc { opacity: 1; }
.product-card-price {
  font-family: "Cormorant Garamond", serif;
  font-size: 1.1rem;
  color: var(--cm-gold-400);
  letter-spacing: 0.05em;
}

/* --- Features / DNA --- */
.features-section { padding: 120px 0; background: var(--cm-white); }
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 48px;
}
.feature-item { text-align: center; }
.feature-icon {
  width: 56px; height: 56px;
  margin: 0 auto 24px;
  border: 2px solid var(--cm-red);
  display: flex; align-items: center; justify-content: center;
  background: var(--cm-red-bg);
}
.feature-icon svg { width: 24px; height: 24px; stroke: var(--cm-red); fill: none; }
.feature-title {
  font-family: "Noto Sans SC", sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--cm-black);
  margin-bottom: 12px;
  letter-spacing: 0.04em;
}
.feature-desc {
  font-family: "Noto Serif SC", serif;
  font-size: 0.88rem;
  font-weight: 300;
  color: var(--cm-gray-400);
  line-height: 1.9;
  letter-spacing: 0.03em;
}

/* --- Brand Story Strip --- */
.brand-strip {
  padding: 120px 0;
  background: var(--cm-black);
  position: relative;
  overflow: hidden;
}
.brand-strip::before {
  content: 'CaseMe';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-family: "Cormorant Garamond", serif;
  font-size: 18vw;
  font-weight: 600;
  color: rgba(255,255,255,0.02);
  white-space: nowrap;
  pointer-events: none;
  letter-spacing: 0.1em;
}
.brand-strip-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.brand-strip-text .label { margin-bottom: 20px; }
.brand-strip-text h2 {
  color: var(--cm-white);
  margin-bottom: 28px;
  font-weight: 800;
  font-size: 2.6rem;
  letter-spacing: -0.02em;
}
.brand-strip-text h2 em { font-style: normal; color: var(--cm-red); }
.brand-strip-text p {
  font-family: "Noto Serif SC", serif;
  font-size: 0.95rem;
  font-weight: 300;
  color: rgba(255,255,255,0.6);
  line-height: 2;
  letter-spacing: 0.04em;
  margin-bottom: 20px;
}
.brand-strip-text blockquote {
  border-left: 3px solid var(--cm-red);
  padding-left: 20px;
  margin: 32px 0;
  font-family: "Noto Serif SC", serif;
  font-size: 1rem;
  font-weight: 400;
  color: rgba(255,255,255,0.8);
  font-style: italic;
  line-height: 1.9;
  letter-spacing: 0.04em;
}
.brand-img-stack {
  position: relative;
  height: 480px;
}
.brand-img-main {
  position: absolute;
  top: 0; right: 0;
  width: 80%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.85);
}
.brand-img-accent {
  position: absolute;
  bottom: -32px; left: 0;
  width: 48%;
  height: 52%;
  object-fit: cover;
  border: 4px solid var(--cm-black);
  filter: brightness(0.9);
}

/* --- Categories / 产品系列 --- */
.categories-section { padding: 120px 0; background: var(--cm-cream); }
.categories-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.cat-card {
  background: var(--cm-white);
  padding: 40px 28px;
  text-align: center;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
  cursor: pointer;
}
.cat-card:hover {
  border-bottom-color: var(--cm-red);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.cat-num {
  font-family: "Poppins", sans-serif;
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--cm-gray-200);
  line-height: 1;
  margin-bottom: 16px;
  letter-spacing: -0.03em;
}
.cat-card:hover .cat-num { color: var(--cm-red); }
.cat-name {
  font-family: "Noto Sans SC", sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--cm-black);
  margin-bottom: 10px;
  letter-spacing: 0.05em;
}
.cat-desc {
  font-family: "Noto Serif SC", serif;
  font-size: 0.83rem;
  font-weight: 300;
  color: var(--cm-gray-400);
  line-height: 1.8;
  letter-spacing: 0.03em;
}

/* --- B2B Strip --- */
.b2b-section {
  padding: 80px 0;
  background: var(--cm-dark);
  border-top: 1px solid rgba(255,255,255,0.04);
}
.b2b-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
}
.b2b-text h3 {
  font-family: "Poppins", "Noto Sans SC", sans-serif;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--cm-white);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.b2b-text p {
  font-family: "Noto Serif SC", serif;
  font-size: 0.93rem;
  font-weight: 300;
  color: rgba(255,255,255,0.5);
  line-height: 1.9;
  letter-spacing: 0.03em;
  max-width: 560px;
}
.b2b-badges {
  display: flex;
  gap: 12px;
  flex-shrink: 0;
}
.b2b-badge {
  text-align: center;
  padding: 20px 28px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  min-width: 110px;
}
.b2b-badge-num {
  font-family: "Poppins", sans-serif;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--cm-red);
  line-height: 1;
  letter-spacing: 0.02em;
}
.b2b-badge-label {
  font-family: "Noto Sans SC", sans-serif;
  font-size: 0.75rem;
  font-weight: 400;
  color: rgba(255,255,255,0.4);
  margin-top: 6px;
  letter-spacing: 0.02em;
}

/* --- Contact CTA --- */
.cta-section {
  padding: 120px 0;
  background: var(--cm-red);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(255,255,255,0.08) 0%, transparent 70%);
}
.cta-section .container { position: relative; z-index: 1; }
.cta-section .label { margin-bottom: 20px; }
.cta-section h2 {
  color: var(--cm-white);
  font-weight: 800;
  margin-bottom: 20px;
  font-size: 3rem;
  letter-spacing: -0.02em;
}
.cta-section h2 em { font-style: normal; color: rgba(255,255,255,0.75); }
.cta-section p {
  font-family: "Noto Serif SC", serif;
  font-size: 1rem;
  font-weight: 300;
  color: rgba(255,255,255,0.6);
  max-width: 500px;
  margin: 0 auto 40px;
  line-height: 1.9;
  letter-spacing: 0.04em;
}
.cta-contacts {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  margin-top: 48px;
  flex-wrap: wrap;
}
.cta-contact-item {
  text-align: center;
  color: rgba(255,255,255,0.7);
}
.cta-contact-label {
  font-family: "Poppins", sans-serif;
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
  margin-bottom: 8px;
}
.cta-contact-value {
  font-family: "Noto Serif SC", serif;
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--cm-white);
  letter-spacing: 0.04em;
}

/* --- Footer --- */
footer {
  background: var(--cm-black);
  padding: 64px 0 32px;
  border-top: 1px solid rgba(255,255,255,0.04);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand-name {
  font-family: "Cormorant Garamond", serif;
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--cm-white);
  margin-bottom: 4px;
}
.footer-brand-sub {
  font-family: "Poppins", sans-serif;
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cm-gold-500);
  margin-bottom: 20px;
}
.footer-brand p {
  font-family: "Noto Serif SC", serif;
  font-size: 0.85rem;
  font-weight: 300;
  color: rgba(255,255,255,0.4);
  line-height: 1.9;
  letter-spacing: 0.03em;
  margin-bottom: 12px;
}
footer h4 {
  font-family: "Poppins", sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cm-white);
  margin-bottom: 20px;
}
footer ul li {
  margin-bottom: 10px;
}
footer ul li a {
  font-family: "Noto Serif SC", serif;
  font-size: 0.85rem;
  font-weight: 300;
  color: rgba(255,255,255,0.4);
  letter-spacing: 0.03em;
  transition: var(--transition);
}
footer ul li a:hover { color: var(--cm-gold-400); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-bottom p {
  font-family: "Poppins", sans-serif;
  font-size: 0.72rem;
  color: rgba(255,255,255,0.25);
  letter-spacing: 0.05em;
}

/* --- Page Header (inner pages) --- */
.page-header {
  padding: 160px 0 80px;
  background: var(--cm-dark);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-header-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.2;
}
.page-header::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(13,13,13,0.3) 0%, rgba(13,13,13,0.7) 100%);
}
.page-header .container { position: relative; z-index: 1; }
.page-header .label { margin-bottom: 20px; }
.page-header h1 {
  color: var(--cm-white);
  font-weight: 400;
  font-size: 3.5rem;
}
.page-header p {
  font-family: "Noto Serif SC", serif;
  font-size: 1.05rem;
  font-weight: 300;
  color: rgba(255,255,255,0.6);
  max-width: 560px;
  margin: 20px auto 0;
  line-height: 1.9;
  letter-spacing: 0.04em;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .product-card:first-child { grid-column: span 1; aspect-ratio: 3/4; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .categories-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .b2b-inner { flex-direction: column; }
}
@media (max-width: 768px) {
  :root { --nav-height: 64px; }
  h1 { font-size: 2.4rem; }
  h2 { font-size: 2rem; }
  .container { padding: 0 20px; }
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .hero h1 { font-size: 2.6rem; }
  .product-grid { grid-template-columns: 1fr; }
  .brand-strip-inner { grid-template-columns: 1fr; }
  .brand-img-stack { height: 320px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .features-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-contacts { gap: 28px; }
}
@media (max-width: 480px) {
  .categories-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .b2b-badges { flex-wrap: wrap; justify-content: center; }
}