/* ========== Reset & Base ========== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "Noto Serif SC", "STSong", "SimSun", Georgia, serif;
  background: #fcf8f5;
  color: #3a2a24;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }

/* ========== Navigation ========== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 40px;
  background: rgba(252,248,245,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(180,150,130,0.2);
  transition: all 0.3s;
}
.nav.scrolled {
  padding: 10px 40px;
  box-shadow: 0 2px 20px rgba(60,42,36,0.06);
}
.logo {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 4px;
  color: #3a2a24;
}
.logo span {
  color: #b4836a;
}
.logo small {
  display: block;
  font-size: 10px;
  letter-spacing: 3px;
  color: #8a7568;
  font-weight: 400;
  margin-top: -2px;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: #3a2a24;
  border-radius: 2px;
  transition: 0.3s;
}
.nav-links {
  display: flex;
  list-style: none;
  gap: 32px;
  align-items: center;
}
.nav-links a {
  font-size: 14px;
  letter-spacing: 2px;
  color: #5a4a3a;
  transition: color 0.3s;
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
}
.nav-links a:hover { color: #b4836a; }
.nav-cta {
  background: #b4836a;
  color: #fcf8f5 !important;
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 13px !important;
  transition: background 0.3s !important;
}
.nav-cta:hover { background: #9a6f57 !important; }

@media (max-width: 768px) {
  .nav { padding: 14px 20px; }
  .nav-toggle { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    background: #fcf8f5;
    padding: 20px;
    gap: 16px;
    border-bottom: 1px solid rgba(180,150,130,0.2);
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
  }
  .nav-links.open { display: flex; }
}

/* ========== Hero ========== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 120px 24px 80px;
  background: linear-gradient(180deg, #fcf8f5 0%, #f5ede6 50%, #efe3d8 100%);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: -30%; left: -20%;
  width: 70%; height: 120%;
  background: radial-gradient(ellipse, rgba(180,131,106,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  bottom: -20%; right: -20%;
  width: 60%; height: 100%;
  background: radial-gradient(ellipse, rgba(200,170,150,0.06) 0%, transparent 70%);
  pointer-events: none;
}
.hero-badge {
  display: inline-block;
  background: rgba(180,131,106,0.12);
  color: #b4836a;
  font-size: 12px;
  letter-spacing: 4px;
  padding: 6px 18px;
  border-radius: 20px;
  margin-bottom: 24px;
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
}
.hero h1 {
  font-size: clamp(32px, 6vw, 56px);
  font-weight: 700;
  color: #3a2a24;
  line-height: 1.3;
  margin-bottom: 16px;
  position: relative;
}
.hero h1 span {
  color: #b4836a;
}
.hero p {
  font-size: clamp(15px, 2vw, 18px);
  color: #7a6a5a;
  max-width: 600px;
  line-height: 1.8;
  margin-bottom: 32px;
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
  font-weight: 300;
}
.hero-floating {
  position: absolute;
  width: 200px; height: 200px;
  border: 1px solid rgba(180,131,106,0.1);
  border-radius: 50%;
  top: 15%; right: 12%;
  animation: float 8s ease-in-out infinite;
}
.hero-floating-2 {
  position: absolute;
  width: 120px; height: 120px;
  border: 1px solid rgba(180,131,106,0.08);
  border-radius: 50%;
  bottom: 20%; left: 10%;
  animation: float 6s ease-in-out infinite reverse;
}
@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(5deg); }
}

.hero-btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 2px;
  cursor: pointer;
  transition: all 0.3s;
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
  border: none;
}
.btn-primary {
  background: #b4836a;
  color: #fcf8f5;
}
.btn-primary:hover {
  background: #9a6f57;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(180,131,106,0.3);
}
.btn-outline {
  background: transparent;
  color: #b4836a;
  border: 2px solid #b4836a;
}
.btn-outline:hover {
  background: #b4836a;
  color: #fcf8f5;
  transform: translateY(-2px);
}

/* ========== Section Common ========== */
.section {
  padding: 100px 24px;
  max-width: 1200px;
  margin: 0 auto;
}
.section-title {
  font-size: clamp(28px, 4vw, 38px);
  text-align: center;
  color: #3a2a24;
  margin-bottom: 12px;
  letter-spacing: 2px;
}
.section-title::after {
  content: "";
  display: block;
  width: 40px;
  height: 3px;
  background: linear-gradient(90deg, #b4836a, #d4b8a0);
  margin: 16px auto 0;
  border-radius: 2px;
}
.section-subtitle {
  text-align: center;
  color: #8a7568;
  font-size: 16px;
  margin-bottom: 56px;
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
  font-weight: 300;
}

/* ========== Brand Story ========== */
.brand-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
@media (max-width: 768px) {
  .brand-grid { grid-template-columns: 1fr; gap: 32px; }
}
.brand-text h2 {
  font-size: clamp(24px, 3vw, 32px);
  color: #3a2a24;
  margin-bottom: 20px;
}
.brand-text p {
  color: #6a5a4a;
  font-size: 15px;
  margin-bottom: 16px;
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
  line-height: 1.9;
}
.brand-text .brand-year {
  display: inline-block;
  background: rgba(180,131,106,0.1);
  color: #b4836a;
  font-size: 13px;
  padding: 4px 14px;
  border-radius: 12px;
  margin-bottom: 20px;
  font-family: "Noto Sans SC", sans-serif;
}
.brand-visual {
  background: linear-gradient(135deg, #f0e6dd, #e8dacf);
  border-radius: 20px;
  padding: 40px;
  min-height: 360px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.brand-visual .big-icon {
  font-size: 72px;
  margin-bottom: 20px;
  opacity: 0.8;
}
.brand-visual p {
  font-size: 15px;
  color: #7a6a5a;
  font-family: "Noto Sans SC", sans-serif;
}
.brand-visual .deco-ring {
  position: absolute;
  border: 1px solid rgba(180,131,106,0.15);
  border-radius: 50%;
}
.brand-visual .ring-1 { width: 240px; height: 240px; top: -60px; right: -60px; }
.brand-visual .ring-2 { width: 160px; height: 160px; bottom: -40px; left: -40px; }

/* ========== Products ========== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
@media (max-width: 1024px) {
  .products-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .products-grid { grid-template-columns: 1fr; }
}
.product-card {
  background: #fff;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 2px 20px rgba(60,42,36,0.04);
  transition: transform 0.3s, box-shadow 0.3s;
  border: 1px solid rgba(180,150,130,0.1);
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(60,42,36,0.08);
}
.product-card .product-img {
  width: 100%;
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, #f5ede6, #efe3d8);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  position: relative;
}
.product-card .product-img .tag {
  position: absolute;
  top: 12px; left: 12px;
  background: #b4836a;
  color: #fff;
  font-size: 11px;
  padding: 3px 12px;
  border-radius: 10px;
  letter-spacing: 2px;
  font-family: "Noto Sans SC", sans-serif;
}
.product-card .product-body {
  padding: 24px;
}
.product-card .product-body h3 {
  font-size: 18px;
  margin-bottom: 8px;
  color: #3a2a24;
}
.product-card .product-body .product-sub {
  font-size: 13px;
  color: #b4836a;
  letter-spacing: 2px;
  margin-bottom: 10px;
  font-family: "Noto Sans SC", sans-serif;
}
.product-card .product-body p {
  font-size: 14px;
  color: #7a6a5a;
  font-family: "Noto Sans SC", sans-serif;
  line-height: 1.7;
  margin-bottom: 14px;
}
.product-card .product-body .spec-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.product-card .product-body .spec-tags span {
  font-size: 11px;
  background: #f5ede6;
  color: #7a6a5a;
  padding: 3px 10px;
  border-radius: 8px;
  font-family: "Noto Sans SC", sans-serif;
}

/* ========== Stats ========== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
@media (max-width: 768px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
}
.stat-item {
  text-align: center;
  padding: 32px 16px;
  background: #fff;
  border-radius: 16px;
  border: 1px solid rgba(180,150,130,0.1);
}
.stat-number {
  font-size: 36px;
  font-weight: 700;
  color: #b4836a;
  display: block;
  margin-bottom: 6px;
}
.stat-label {
  font-size: 15px;
  color: #3a2a24;
  font-weight: 600;
  margin-bottom: 6px;
  font-family: "Noto Sans SC", sans-serif;
}
.stat-desc {
  font-size: 13px;
  color: #8a7568;
  font-family: "Noto Sans SC", sans-serif;
}

/* ========== Features ========== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
@media (max-width: 640px) {
  .features-grid { grid-template-columns: 1fr; }
}
.feature-item {
  background: #fff;
  padding: 32px;
  border-radius: 16px;
  border: 1px solid rgba(180,150,130,0.08);
  transition: transform 0.3s;
}
.feature-item:hover { transform: translateY(-3px); }
.feature-icon {
  font-size: 32px;
  display: block;
  margin-bottom: 14px;
}
.feature-item h4 {
  font-size: 17px;
  color: #3a2a24;
  margin-bottom: 8px;
}
.feature-item p {
  font-size: 14px;
  color: #7a6a5a;
  font-family: "Noto Sans SC", sans-serif;
  line-height: 1.7;
}

/* ========== CTA ========== */
.cta-section {
  text-align: center;
  padding: 80px 24px;
  background: linear-gradient(135deg, #3a2a24 0%, #5a4035 100%);
  color: #fcf8f5;
}
.cta-section h2 {
  font-size: clamp(24px, 4vw, 36px);
  margin-bottom: 12px;
}
.cta-section p {
  font-size: 16px;
  opacity: 0.8;
  margin-bottom: 28px;
  font-family: "Noto Sans SC", sans-serif;
}
.cta-section .btn-primary {
  background: #b4836a;
}
.cta-section .btn-primary:hover {
  background: #c9a08a;
}

/* ========== Contact ========== */
.contact-flex {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
@media (max-width: 768px) {
  .contact-flex { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .contact-flex { grid-template-columns: 1fr; }
}
.contact-card {
  text-align: center;
  padding: 32px 16px;
  border-radius: 16px;
  background: #fff;
  border: 1px solid rgba(180,150,130,0.1);
  transition: transform 0.3s;
}
.contact-card:hover { transform: translateY(-3px); }
.contact-card .emoji {
  font-size: 32px;
  display: block;
  margin-bottom: 12px;
}
.contact-card h4 {
  font-size: 15px;
  color: #3a2a24;
  margin-bottom: 6px;
}
.contact-card p {
  font-size: 14px;
  color: #7a6a5a;
  font-family: "Noto Sans SC", sans-serif;
}

/* ========== Footer ========== */
.footer {
  text-align: center;
  padding: 40px 24px;
  background: #3a2a24;
  color: rgba(252,248,245,0.6);
  font-size: 13px;
}
.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.footer-links a {
  color: rgba(252,248,245,0.7);
  font-size: 13px;
  letter-spacing: 2px;
  transition: color 0.3s;
  font-family: "Noto Sans SC", sans-serif;
}
.footer-links a:hover { color: #fcf8f5; }

/* ========== 品牌理念区 ========== */
.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 768px) {
  .philosophy-grid { grid-template-columns: 1fr; }
}
.philosophy-item {
  text-align: center;
  padding: 40px 24px;
  border-radius: 16px;
  background: #fff;
  border: 1px solid rgba(180,150,130,0.1);
  transition: transform 0.3s;
}
.philosophy-item:hover { transform: translateY(-4px); }
.philosophy-item .icon {
  font-size: 40px;
  display: block;
  margin-bottom: 16px;
}
.philosophy-item h3 {
  font-size: 18px;
  color: #3a2a24;
  margin-bottom: 10px;
}
.philosophy-item p {
  font-size: 14px;
  color: #7a6a5a;
  font-family: "Noto Sans SC", sans-serif;
  line-height: 1.8;
}

/* ========== Fade-in animations ========== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s, transform 0.8s;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-in-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.8s, transform 0.8s;
}
.fade-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}
.fade-in-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.8s, transform 0.8s;
}
.fade-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* ========== Scrollbar ========== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: #fcf8f5; }
::-webkit-scrollbar-thumb { background: #d4b8a0; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #b4836a; }

/* ========== Clients ========== */
.clients-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
}
.client-item {
  padding: 16px 28px;
  background: #fff;
  border: 1px solid rgba(180,150,130,0.1);
  border-radius: 12px;
  color: #8a7568;
  font-size: 14px;
  font-family: "Noto Sans SC", sans-serif;
  letter-spacing: 1px;
}