/* ============================================
   百年永恒贸易有限公司 - 企业官网 v2.0
   视觉风格：深海蓝 #0a2b4f + 鎏金 #c9a84c
   大厂商务质感 · 精致细节
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: #2c2c2c;
  background: #fafbfc;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }

/* --- Variables --- */
:root {
  --navy: #0a1f3d;
  --navy-dark: #071530;
  --navy-mid: #0f2d54;
  --navy-light: #1a4b7a;
  --navy-subtle: #eef2f7;
  --gold: #c9a84c;
  --gold-light: #e0c878;
  --gold-dark: #a8882e;
  --gold-gradient: linear-gradient(135deg, #c9a84c, #b89630);
  --white: #ffffff;
  --gray-50: #f8f9fb;
  --gray-100: #f0f2f5;
  --gray-200: #e4e7ed;
  --gray-300: #c8ccd4;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --text: #2c2c2c;
  --text-light: #6b7280;
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --shadow-xs: 0 1px 3px rgba(10,31,61,0.06);
  --shadow-sm: 0 2px 8px rgba(10,31,61,0.07);
  --shadow-md: 0 4px 16px rgba(10,31,61,0.1);
  --shadow-lg: 0 8px 32px rgba(10,31,61,0.12);
  --shadow-xl: 0 16px 48px rgba(10,31,61,0.16);
  --shadow-gold: 0 4px 16px rgba(201,168,76,0.25);
  --nav-height: 72px;
  --font-display: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}
@media (max-width: 768px) {
  :root { --nav-height: 60px; }
}

/* --- Typography --- */
body { font-size: 16px; }
h1, h2, h3, h4, h5 { font-family: var(--font-display); font-weight: 600; line-height: 1.3; color: var(--navy); }
h1 { font-size: clamp(2rem, 4vw, 3.2rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); letter-spacing: -0.01em; }
h3 { font-size: clamp(1.1rem, 1.8vw, 1.35rem); }
h4 { font-size: 1.05rem; }
p { color: var(--text-light); line-height: 1.8; }
.section-subtitle {
  font-size: 0.95rem;
  color: var(--text-light);
  max-width: 560px;
  margin: 8px auto 0;
}

/* --- Container --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
@media (max-width: 768px) { .container { padding: 0 16px; } }

/* --- Section --- */
.section {
  padding: 100px 0;
}
@media (max-width: 768px) { .section { padding: 60px 0; } }
.section-alt { background: var(--gray-50); }
.section-dark {
  background: linear-gradient(135deg, var(--navy-light), #2a6db5);
  color: #fff;
}
.section-dark h2, .section-dark .section-subtitle { color: #fff; }

.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-header h2 {
  position: relative;
  display: inline-block;
}
.section-header h2::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  background: var(--gold);
  border-radius: 2px;
  margin: 16px auto 0;
}
.section-header h2 .gold { color: var(--gold); }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-family: inherit;
  letter-spacing: 0.3px;
}
.btn-primary {
  background: var(--gold-gradient);
  color: #fff;
  box-shadow: 0 2px 8px rgba(201,168,76,0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-gold);
}
.btn-outline {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.4);
}
.btn-outline:hover {
  border-color: var(--gold);
  color: var(--gold);
  background: rgba(201,168,76,0.08);
}
.btn-white {
  background: #fff;
  color: var(--navy);
  box-shadow: var(--shadow-sm);
}
.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.btn-link {
  background: transparent;
  color: var(--gold-dark);
  padding: 8px 0;
  font-weight: 600;
  font-size: 0.88rem;
}
.btn-link::after {
  content: '→';
  transition: transform 0.3s;
  display: inline-block;
  margin-left: 4px;
}
.btn-link:hover::after { transform: translateX(4px); }

/* ============================================
   NAVIGATION
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  transition: all 0.3s;
}
.header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,0,0,0.04);
}
.header.scrolled::before {
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}
.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  z-index: 1;
}

/* Logo */
.logo-area {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo-item {
  display: flex;
  align-items: center;
}
.logo-item img { height: 40px; width: auto; }
.logo-divider {
  width: 1px;
  height: 28px;
  background: var(--gray-200);
}
.logo-placeholder {
  height: 36px;
  padding: 0 14px;
  background: var(--gray-100);
  border-radius: 6px;
  display: flex;
  align-items: center;
  font-size: 0.7rem;
  color: var(--gray-400);
  letter-spacing: 1px;
  border: 1px dashed var(--gray-300);
}

/* Nav Menu */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav-menu > li > a {
  display: block;
  padding: 8px 14px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text);
  border-radius: 6px;
  transition: all 0.2s;
  position: relative;
}
.nav-menu > li > a:hover {
  color: var(--navy);
  background: rgba(10,31,61,0.04);
}
.nav-menu > li > a.active {
  color: var(--navy);
  font-weight: 600;
}
.nav-menu > li > a.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2.5px;
  background: var(--gold);
  border-radius: 2px;
}

/* Nav Right */
.nav-right {
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-phone {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  background: var(--gold-gradient);
  color: #fff;
  border-radius: 50px;
  font-size: 0.82rem;
  font-weight: 600;
  white-space: nowrap;
  transition: all 0.3s;
}
.nav-phone:hover {
  box-shadow: var(--shadow-gold);
  transform: translateY(-1px);
}
.nav-wechat {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gray-100);
  font-size: 1.1rem;
  cursor: pointer;
  transition: all 0.2s;
  color: var(--navy);
}
.nav-wechat:hover { background: var(--navy); color: var(--gold); }

/* Mobile Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 6px;
  background: none;
  border: none;
}
.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--navy);
  border-radius: 2px;
  transition: all 0.3s;
}
.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ============================================
   HERO
   ============================================ */
.hero-wrap { padding-top: var(--nav-height); }
.hero {
  position: relative;
  overflow: hidden;
  min-height: 75vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--navy-dark), var(--navy), var(--navy-mid));
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(201,168,76,0.08) 0%, transparent 50%),
              radial-gradient(ellipse at 80% 20%, rgba(255,255,255,0.03) 0%, transparent 40%);
  pointer-events: none;
}
.hero-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}
.hero-particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--gold);
  border-radius: 50%;
  opacity: 0.15;
}
.hero-particle:nth-child(1) { top: 20%; left: 10%; animation: float 8s ease-in-out infinite; }
.hero-particle:nth-child(2) { top: 60%; left: 85%; animation: float 10s ease-in-out infinite 1s; }
.hero-particle:nth-child(3) { top: 30%; right: 20%; animation: float 12s ease-in-out infinite 2s; }
.hero-particle:nth-child(4) { bottom: 20%; left: 40%; animation: float 9s ease-in-out infinite 0.5s; }
@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-20px) scale(1.5); opacity: 0.3; }
}

.hero-content {
  position: relative;
  z-index: 2;
  width: 100%;
}
.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 24px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
}
.hero-text .hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: rgba(201,168,76,0.12);
  border: 1px solid rgba(201,168,76,0.2);
  border-radius: 50px;
  font-size: 0.78rem;
  color: var(--gold-light);
  font-weight: 500;
  margin-bottom: 24px;
  letter-spacing: 1px;
}
.hero-text h1 {
  color: #fff;
  line-height: 1.2;
  margin-bottom: 20px;
}
.hero-text .hero-desc {
  color: rgba(255,255,255,0.65);
  font-size: 1.08rem;
  line-height: 1.8;
  max-width: 560px;
  margin-bottom: 36px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Hero Stats */
.hero-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.hero-stat {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  backdrop-filter: blur(4px);
  transition: all 0.3s;
}
.hero-stat:hover {
  background: rgba(255,255,255,0.08);
  transform: translateY(-2px);
}
.hero-stat .num {
  font-size: 2rem;
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
  margin-bottom: 6px;
}
.hero-stat .label {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.6);
}

/* ============================================
/* ============================================
   SCROLL ANIMATIONS
   ============================================ */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}
.stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}
.stagger.visible > *:nth-child(1) { transition-delay: 0.05s; opacity: 1; transform: translateY(0); }
.stagger.visible > *:nth-child(2) { transition-delay: 0.1s; opacity: 1; transform: translateY(0); }
.stagger.visible > *:nth-child(3) { transition-delay: 0.15s; opacity: 1; transform: translateY(0); }
.stagger.visible > *:nth-child(4) { transition-delay: 0.2s; opacity: 1; transform: translateY(0); }
.stagger.visible > *:nth-child(5) { transition-delay: 0.25s; opacity: 1; transform: translateY(0); }
.stagger.visible > *:nth-child(6) { transition-delay: 0.3s; opacity: 1; transform: translateY(0); }


   BUSINESS GRID (核心业务)
   ============================================ */
.business-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.business-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 40px 28px 32px;
  text-align: center;
  box-shadow: var(--shadow-xs);
  border: 1px solid var(--gray-200);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.business-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gold-gradient);
  transform: scaleX(0);
  transition: transform 0.4s;
  transform-origin: left;
}
.business-card:hover::before { transform: scaleX(1); }
.business-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.business-card .icon-wrap {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(10,31,61,0.04), rgba(201,168,76,0.08));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.8rem;
  transition: all 0.3s;
}
.business-card:hover .icon-wrap {
  background: linear-gradient(135deg, var(--navy), var(--navy-light));
  color: var(--gold);
  transform: scale(1.05);
}
.business-card h3 { font-size: 1.1rem; margin-bottom: 10px; }
.business-card p { font-size: 0.88rem; color: var(--text-light); margin-bottom: 16px; line-height: 1.7; }

/* ============================================
   PRODUCT GRID
   ============================================ */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.product-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xs);
  border: 1px solid var(--gray-200);
  transition: all 0.35s;
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.product-card .img-wrap {
  height: 200px;
  background: linear-gradient(135deg, var(--gray-50), var(--gray-100));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-400);
  font-size: 0.85rem;
  position: relative;
}
.product-card .img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 20px;
}
.product-card .img-wrap .tag {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 3px 12px;
  background: var(--gold);
  color: #fff;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 600;
}
.product-card .info {
  padding: 20px 20px 24px;
}
.product-card .info h4 {
  font-size: 1rem;
  margin-bottom: 10px;
}
.product-card .info .spec { font-size: 0.82rem; color: var(--text-light); margin-bottom: 2px; }
.product-card .info .price {
  margin-top: 12px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gold-dark);
}

/* ============================================
   CASE CARDS
   ============================================ */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.case-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xs);
  border: 1px solid var(--gray-200);
  transition: all 0.35s;
}
.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.case-card .img-wrap {
  height: 200px;
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-400);
  font-size: 0.85rem;
}
.case-card .img-wrap img { width: 100%; height: 100%; object-fit: cover; }
.case-card .info { padding: 20px; }
.case-card .info h4 { font-size: 1rem; margin-bottom: 8px; }
.case-card .info .meta {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.case-card .info .meta span {
  padding: 2px 10px;
  background: var(--navy-subtle);
  border-radius: 20px;
  font-size: 0.75rem;
  color: var(--navy-light);
}
.case-card .info p { font-size: 0.85rem; color: var(--text-light); }
.case-card .info .price {
  margin-top: 12px;
  font-weight: 700;
  color: var(--gold-dark);
  font-size: 1.15rem;
}

/* ============================================
   ADVANTAGE GRID
   ============================================ */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.advantage-card {
  text-align: center;
  padding: 40px 24px;
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xs);
  border: 1px solid var(--gray-200);
  transition: all 0.35s;
}
.advantage-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.advantage-card .num {
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
  margin-bottom: 12px;
}
.advantage-card .num-suffix {
  font-size: 1rem;
  color: var(--text-light);
  font-weight: 400;
}
.advantage-card h4 { margin-bottom: 8px; }
.advantage-card p { font-size: 0.85rem; color: var(--text-light); }

/* ============================================
   STORE
   ============================================ */
.store-map-placeholder {
  width: 100%;
  height: 400px;
  background: linear-gradient(135deg, var(--gray-50), var(--gray-200));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 12px;
  color: var(--gray-400);
  font-size: 1rem;
  border: 2px dashed var(--gray-300);
}
.store-map-placeholder .icon { font-size: 3rem; }

.store-district { margin-bottom: 40px; }
.store-district h3 {
  font-size: 1.2rem;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--gold-light);
}
.store-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.store-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-xs);
  border: 1px solid var(--gray-200);
  transition: all 0.3s;
}
.store-card:hover {
  transform: translateY(-2px);
/* ============================================
   PARTNER / CLIENT LOGO WALL
   ============================================ */
.logo-wall {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
  padding: 10px 0;
}
.logo-wall-item {
  width: 120px;
  height: 60px;
  background: var(--gray-100);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  color: var(--gray-400);
  border: 1px solid var(--gray-200);
  transition: all 0.3s;
  filter: grayscale(1);
  opacity: 0.5;
}
.logo-wall-item:hover {
  filter: grayscale(0);
  opacity: 1;
  border-color: var(--gold-light);
  box-shadow: var(--shadow-sm);
}


  box-shadow: var(--shadow-md);
  border-color: var(--gold-light);
}
.store-card h4 { font-size: 1rem; margin-bottom: 10px; color: var(--navy); }
.store-card p { font-size: 0.85rem; color: var(--text-light); margin-bottom: 4px; display: flex; gap: 6px; }
.store-card .store-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 12px; }
.store-card .store-tags span {
  padding: 3px 10px;
  background: var(--navy-subtle);
  border-radius: 20px;
  font-size: 0.72rem;
  color: var(--navy-light);
}
.store-card .store-phone {
  display: inline-block;
  margin-top: 12px;
  padding: 6px 18px;
  background: var(--gold-gradient);
  color: #fff;
  border-radius: 50px;
  font-size: 0.82rem;
  font-weight: 600;
}

/* ============================================
   CALL TO ACTION
   ============================================ */
.cta-section {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--navy), var(--navy-dark));
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(201,168,76,0.06) 0%, transparent 60%);
}
.cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}
.cta-inner h2 {
  color: #fff;
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  margin-bottom: 12px;
}
.cta-inner p {
  color: rgba(255,255,255,0.6);
  margin-bottom: 32px;
  font-size: 1rem;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--navy-dark);
  color: rgba(255,255,255,0.8);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1.5fr 1.5fr;
  gap: 48px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.footer-col h4 {
  color: var(--gold);
  font-size: 0.95rem;
  margin-bottom: 20px;
  font-weight: 600;
  letter-spacing: 0.5px;
}
.footer-col p, .footer-col li {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.55);
  line-height: 1.9;
}
.footer-col li { padding: 4px 0; }
.footer-col a { transition: color 0.2s; }
.footer-col a:hover { color: var(--gold-light); }
.footer-contact li { display: flex; gap: 8px; }
.footer-contact .label { color: var(--gold); min-width: 70px; font-weight: 500; }
.footer-wechat-qr {
  width: 120px;
  height: 120px;
  background: rgba(255,255,255,0.05);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 12px;
  color: rgba(255,255,255,0.3);
  font-size: 0.75rem;
  text-align: center;
  border: 1px dashed rgba(255,255,255,0.1);
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  margin-top: 48px;
  padding: 24px;
  text-align: center;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.35);
}
.footer-bottom a { color: rgba(255,255,255,0.4); margin: 0 10px; transition: color 0.2s; }
.footer-bottom a:hover { color: var(--gold-light); }

/* ============================================
   FLOATING BUTTONS
   ============================================ */
.float-btns {
  position: fixed;
  right: 24px;
  bottom: 36px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.float-btn {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  cursor: pointer;
  transition: all 0.3s;
  border: none;
  color: #fff;
  box-shadow: var(--shadow-lg);
}
.float-btn-phone { background: var(--gold-gradient); }
.float-btn-phone:hover { transform: scale(1.1); box-shadow: var(--shadow-gold); }
.float-btn-top { background: var(--navy); }
.float-btn-top:hover { transform: scale(1.1); }
.float-btn-top.hidden { opacity: 0; pointer-events: none; transform: scale(0.8); }

/* ============================================
   INNER PAGE HERO
   ============================================ */
.page-hero {
  padding-top: calc(var(--nav-height) + 40px);
  padding-bottom: 60px;
  background: linear-gradient(135deg, var(--navy-light), #2a6db5);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}
.page-hero h1 {
  color: #fff;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin-bottom: 12px;
}
.page-hero p {
  color: rgba(255,255,255,0.6);
  font-size: 1rem;
  max-width: 560px;
  margin: 0 auto;
}

/* ============================================
   ABOUT PAGE
   ============================================ */
.about-intro {
  max-width: 860px;
  margin: 0 auto;
  font-size: 1rem;
  line-height: 2;
  color: var(--text-light);
}
.about-intro strong { color: var(--navy); }
.timeline {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
  padding-left: 40px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--gold), var(--gold-light), transparent);
}
.timeline-item {
  position: relative;
  padding: 0 0 40px 30px;
}
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: '';
  position: absolute;
  left: -27px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--gold);
  border: 3px solid #fff;
  box-shadow: 0 0 0 3px var(--gold), var(--shadow-sm);
}
.timeline-item .year {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--gold-dark);
  margin-bottom: 4px;
}
.timeline-item p { font-size: 0.92rem; color: var(--text-light); }

/* ============================================
   FORM
   ============================================ */
.form-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}
.form-box {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
}
.form-box h3 {
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--gold-light);
}
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}
.form-group label .required { color: #e74c3c; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-family: inherit;
  transition: all 0.3s;
  background: #fff;
  color: var(--text);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--navy-light);
  box-shadow: 0 0 0 3px rgba(15,45,84,0.08);
}
.form-group textarea { min-height: 100px; resize: vertical; }

/* ============================================
   CONTACT
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
}
.contact-info-list { display: flex; flex-direction: column; gap: 16px; }
.contact-item {
  display: flex;
  gap: 16px;
  padding: 20px;
  background: #fff;
  border-radius: var(--radius-sm);
  border: 1px solid var(--gray-200);
  transition: all 0.3s;
}
.contact-item:hover { border-color: var(--gold-light); box-shadow: var(--shadow-sm); }
.contact-item .icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--navy);
  color: var(--gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.contact-item h4 { font-size: 0.9rem; margin-bottom: 4px; }
.contact-item p { font-size: 0.85rem; color: var(--text-light); }
.contact-item .phone { font-size: 1.15rem; font-weight: 700; color: var(--gold-dark); }

/* ============================================
   CASE DETAIL
   ============================================ */
.case-detail-wrap { max-width: 860px; margin: 0 auto; }
.case-detail-header { margin-bottom: 32px; }
.case-detail-header .tags { display: flex; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
.case-detail-header .tags span {
  padding: 4px 14px;
  background: var(--navy-subtle);
  border-radius: 20px;
  font-size: 0.78rem;
  color: var(--navy-light);
}
.case-detail-meta {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 36px;
}
.case-detail-meta .item { display: flex; flex-direction: column; gap: 4px; }
.case-detail-meta .item .label { font-size: 0.8rem; color: var(--text-light); }
.case-detail-meta .item .value { font-size: 1rem; font-weight: 600; color: var(--navy); }
.case-detail-meta .item .price-compare { color: #e74c3c; text-decoration: line-through; font-weight: 400; }
.case-detail-meta .item .price-ours { color: var(--gold-dark); font-size: 1.4rem; }
.case-detail-body { line-height: 2; font-size: 0.95rem; }
.case-detail-body h4 { margin: 28px 0 12px; color: var(--navy); font-size: 1.05rem; }
.case-detail-body p { margin-bottom: 12px; }

/* ============================================
   FILTER BAR
   ============================================ */
.filter-bar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 32px;
  align-items: center;
}
.filter-bar select {
  padding: 10px 16px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  background: #fff;
  cursor: pointer;
  color: var(--text);
}
.filter-bar select:focus { outline: none; border-color: var(--navy-light); }

/* ============================================
   BREADCRUMB
   ============================================ */
.breadcrumb {
  padding: 0 0 16px;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.5);
}
.breadcrumb a { color: rgba(255,255,255,0.7); }
.breadcrumb a:hover { color: var(--gold-light); }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 32px; text-align: center; }
  .hero-actions { justify-content: center; }
  .hero-text .hero-desc { margin: 0 auto 36px; }
  .hero-stats { max-width: 400px; margin: 0 auto; }
  .business-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .advantage-grid { grid-template-columns: repeat(2, 1fr); }
  .store-list { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .form-section { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  h1 { font-size: 1.6rem; }
  h2 { font-size: 1.4rem; }
  .section { padding: 56px 0; }
  .section-header { margin-bottom: 36px; }
  .section-header h2::after { width: 36px; }

  .hero { min-height: auto; }
  .hero-inner { padding: 40px 16px; }
  .hero-text .hero-desc { font-size: 0.95rem; }
  .hero-stats { grid-template-columns: 1fr 1fr; gap: 12px; }
  .hero-stat { padding: 16px; }
  .hero-stat .num { font-size: 1.5rem; }

  .menu-toggle { display: flex; }
  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255,255,255,0.98);
    flex-direction: column;
    padding: 16px 24px;
    gap: 0;
    box-shadow: var(--shadow-lg);
    transform: translateY(-105%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
    z-index: 999;
  }
  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-menu > li > a {
    padding: 14px 0;
    border-bottom: 1px solid var(--gray-100);
    border-radius: 0;
    font-size: 0.95rem;
  }
  .nav-menu > li > a.active::after { display: none; }
  .nav-right .nav-phone span { display: none; }
  .nav-phone { padding: 8px 12px; font-size: 0.8rem; }

  .business-grid { grid-template-columns: 1fr; gap: 16px; }
  .product-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .case-grid { grid-template-columns: 1fr; }
  .advantage-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .store-list { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-col { text-align: center; }
  .footer-wechat-qr { margin: 12px auto; }
  .form-section { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .case-detail-meta { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .product-grid { grid-template-columns: 1fr; }
  .advantage-grid { grid-template-columns: 1fr; }
  .btn { padding: 12px 24px; font-size: 0.85rem; }
  .float-btns { right: 16px; bottom: 20px; }
  .float-btn { width: 44px; height: 44px; font-size: 1rem; }
}

/* ============================================
   NAV DROPDOWN
   ============================================ */
.nav-has-dropdown {
  position: relative;
}
.nav-has-dropdown > a {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-has-dropdown > a .arrow {
  display: inline-block;
  font-size: 0.6rem;
  transition: transform 0.25s;
  margin-left: 2px;
}
.nav-has-dropdown:hover > a .arrow {
  transform: rotate(180deg);
}
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 8px;
  min-width: 200px;
  opacity: 0;
  pointer-events: none;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid var(--gray-200);
}
.nav-has-dropdown:hover .nav-dropdown {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(4px);
}
.nav-dropdown a {
  display: block;
  padding: 10px 16px;
  border-radius: 6px;
  font-size: 0.88rem;
  color: var(--text);
  transition: all 0.2s;
}
.nav-dropdown a:hover {
  background: var(--navy-subtle);
  color: var(--navy);
}
.nav-dropdown a .desc {
  display: block;
  font-size: 0.75rem;
  color: var(--text-light);
  font-weight: 400;
  margin-top: 2px;
}
.nav-dropdown a.active {
  color: var(--navy);
  font-weight: 600;
  background: var(--navy-subtle);
}

/* Mobile dropdown */
@media (max-width: 768px) {
  .nav-dropdown {
    position: static;
    opacity: 1;
    pointer-events: auto;
    transform: none;
    box-shadow: none;
    border: none;
    background: var(--gray-50);
    border-radius: 0;
    padding: 0 0 0 16px;
    display: none;
  }
  .nav-has-dropdown.open .nav-dropdown {
    display: block;
  }
  .nav-dropdown a {
    padding: 10px 16px;
    border-bottom: none;
  }
  .nav-dropdown a .desc { display: none; }
}

/* ====== 🔋 电池配型查询 ====== */
.battery-query-wrap {
  max-width: 720px;
  margin: 0 auto;
}
.battery-search-box {
  display: flex;
  align-items: center;
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transition: box-shadow 0.3s;
}
.battery-search-box:focus-within {
  box-shadow: 0 0 0 3px rgba(201,168,76,0.3), var(--shadow-lg);
}
.battery-search-icon {
  padding: 0 12px 0 20px;
  font-size: 1.3rem;
  color: var(--text-light);
}
.battery-search-input {
  flex: 1;
  border: none;
  outline: none;
  padding: 18px 0;
  font-size: 1rem;
  font-family: inherit;
  color: var(--text);
  background: transparent;
  min-width: 0;
}
.battery-search-input::placeholder {
  color: var(--gray-400);
  font-size: 0.92rem;
}
.battery-search-btn {
  background: var(--gold-gradient);
  border: none;
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 18px 32px;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.2s;
  font-family: inherit;
}
.battery-search-btn:hover { opacity: 0.9; }
.battery-search-btn:active { transform: scale(0.97); }

.battery-section-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0 8px;
  margin-bottom: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.15);
}
.battery-section-divider span {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
}
.battery-section-divider small {
  font-size: 0.78rem;
  font-weight: 400;
  color: rgba(255,255,255,0.5);
}

.battery-ss-tip {
  margin-top: 16px;
  padding: 10px 16px;
  background: rgba(255,255,255,0.08);
  border-radius: 10px;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.75);
  line-height: 1.7;
  border: 1px solid rgba(255,255,255,0.1);
}
.battery-ss-tip strong {
  color: var(--gold-light);
}

.battery-examples {
  margin-top: 16px;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.battery-example-tag {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 20px;
  color: rgba(255,255,255,0.85);
  cursor: pointer;
  font-size: 0.82rem;
  transition: all 0.2s;
}
.battery-example-tag:hover {
  background: rgba(255,255,255,0.22);
  color: #fff;
}

/* 查询结果 */
.battery-results {
  margin-top: 24px;
  display: none;
}
.battery-results.active {
  display: block;
}
.battery-results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: rgba(255,255,255,0.06);
  border-radius: var(--radius);
  margin-bottom: 16px;
}
.battery-results-header-left {
  display: flex;
  align-items: center;
  gap: 12px;
  color: rgba(255,255,255,0.7);
  font-size: 0.88rem;
}
.battery-results-header .count {
  color: var(--gold);
  font-weight: 700;
  font-size: 1.1rem;
}
.battery-results-header .battery-types-summary {
  color: rgba(255,255,255,0.55);
  font-size: 0.82rem;
}

.battery-result-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 12px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s;
}
.battery-result-card:hover {
  box-shadow: var(--shadow-md);
}
.battery-result-top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.battery-result-model {
  font-size: 1rem;
  font-weight: 600;
  color: var(--navy);
}
.battery-result-year {
  font-size: 0.82rem;
  color: var(--text-light);
  background: var(--gray-100);
  padding: 2px 10px;
  border-radius: 10px;
}
.battery-result-series {
  font-size: 0.82rem;
  color: var(--text-light);
  margin-bottom: 12px;
  padding: 6px 10px;
  background: var(--gray-50);
  border-radius: 6px;
}
.battery-result-batname {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--navy);
  letter-spacing: 1px;
}
.battery-result-suit {
  font-size: 0.85rem;
  color: var(--text-light);
  padding: 8px 12px;
  background: var(--gray-50);
  border-radius: 8px;
  margin-bottom: 14px;
  line-height: 1.6;
}
.battery-result-note {
  font-size: 0.78rem;
  color: var(--text-light);
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--gray-200);
}
.battery-result-prices {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.battery-price-item {
  flex: 1;
  min-width: 100px;
  padding: 10px 14px;
  border-radius: 8px;
  text-align: center;
  border: 1px solid var(--gray-200);
}
.battery-price-item .brand {
  font-size: 0.78rem;
  color: var(--text-light);
  margin-bottom: 4px;
}
.battery-price-item .price {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--navy);
}
.battery-price-item .price.gold {
  color: var(--gold-dark);
}
.battery-price-item.recommend {
  border-color: var(--gold);
  background: linear-gradient(135deg, #fffdf5, #fff8e7);
}
.battery-price-item.recommend .price {
  color: var(--gold-dark);
}

.battery-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 10px;
  font-size: 0.75rem;
  font-weight: 600;
}
.battery-badge.start-stop {
  background: #e8f5e9;
  color: #2e7d32;
}
.battery-badge.normal {
  background: #fff3e0;
  color: #e65100;
}

.battery-result-empty {
  text-align: center;
  padding: 40px 20px;
  background: rgba(255,255,255,0.05);
  border-radius: var(--radius);
  color: rgba(255,255,255,0.5);
}
.battery-result-empty .icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}
.battery-result-empty .hint {
  margin-top: 8px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.35);
}

/* 加载动画 */
@keyframes bat-spin {
  to { transform: rotate(360deg); }
}
.battery-searching {
  text-align: center;
  padding: 30px;
  color: rgba(255,255,255,0.6);
}
.battery-searching::before {
  content: '⏳';
  display: inline-block;
  animation: bat-spin 1s linear infinite;
  font-size: 1.5rem;
  margin-right: 8px;
}

@media (max-width: 768px) {
  .battery-search-btn {
    padding: 14px 18px;
    font-size: 0.85rem;
  }
  .battery-search-input {
    padding: 14px 0;
    font-size: 0.92rem;
  }
  .battery-search-icon {
    padding: 0 8px 0 14px;
  }
  .battery-result-card {
    padding: 16px;
  }
  .battery-price-item {
    min-width: calc(50% - 4px);
  }
  .battery-example-tag {
    font-size: 0.75rem;
    padding: 3px 10px;
  }
}