:root {
  --brand-primary: #1a2a3a;
  --brand-secondary: #c9a96e;
  --brand-accent: #e8d5b5;
  --brand-light: #f7f4ef;
  --brand-dark: #0f1a24;
  --text-primary: #1e1e1e;
  --text-secondary: #4a4a4a;
  --text-muted: #7a7a7a;
  --bg-body: #fdfcfa;
  --bg-card: #ffffff;
  --bg-section-alt: #f5f1ea;
  --border-color: #e0d9cf;
  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.45);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 48px rgba(26, 42, 58, 0.14);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --transition: 0.25s ease;
  --transition-slow: 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

[data-theme="dark"] {
  --brand-primary: #d4c5a9;
  --brand-secondary: #c9a96e;
  --brand-accent: #3a3025;
  --brand-light: #1a1a1a;
  --brand-dark: #f0ece5;
  --text-primary: #e8e4dc;
  --text-secondary: #b8b3aa;
  --text-muted: #8a857c;
  --bg-body: #121212;
  --bg-card: #1e1e1e;
  --bg-section-alt: #1a1a1a;
  --border-color: #2e2e2e;
  --glass-bg: rgba(30, 30, 30, 0.72);
  --glass-border: rgba(255, 255, 255, 0.08);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.65);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 90px;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.75;
  font-size: 16px;
  transition: background-color var(--transition), color var(--transition);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--brand-secondary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--brand-primary);
}

img,
svg {
  max-width: 100%;
  height: auto;
  display: block;
}

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
}

::selection {
  background: var(--brand-secondary);
  color: var(--brand-dark);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ============ 顶部导航 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--glass-border);
  transition: box-shadow var(--transition), background-color var(--transition);
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--brand-primary);
  flex-shrink: 0;
  transition: transform var(--transition);
}

.logo:hover {
  transform: translateY(-1px);
}

.logo svg {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(26, 42, 58, 0.18);
}

.nav-main {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

.nav-main a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: background-color var(--transition), color var(--transition), transform var(--transition);
  white-space: nowrap;
  position: relative;
}

.nav-main a:hover,
.nav-main a.active {
  background-color: var(--brand-light);
  color: var(--brand-primary);
  transform: translateY(-1px);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.search-box {
  display: flex;
  align-items: center;
  background-color: var(--bg-section-alt);
  border-radius: 30px;
  padding: 4px 6px 4px 16px;
  border: 1px solid var(--border-color);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-box:focus-within {
  border-color: var(--brand-secondary);
  box-shadow: 0 0 0 3px rgba(201, 169, 110, 0.15);
}

.search-box input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 0.9rem;
  color: var(--text-primary);
  width: 150px;
  padding: 6px 0;
  font-family: inherit;
}

.search-box input::placeholder {
  color: var(--text-muted);
}

.search-box button {
  background: var(--brand-primary);
  border: none;
  color: #fff;
  border-radius: 20px;
  padding: 6px 14px;
  font-size: 0.85rem;
  cursor: pointer;
  font-family: inherit;
  transition: background-color var(--transition), color var(--transition), transform var(--transition);
}

.search-box button:hover {
  background: var(--brand-secondary);
  color: var(--brand-dark);
  transform: scale(1.04);
}

.theme-toggle,
.menu-toggle {
  background: var(--bg-section-alt);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition), border-color var(--transition), transform var(--transition);
  font-size: 1.1rem;
  line-height: 1;
}

.theme-toggle:hover,
.menu-toggle:hover {
  background: var(--brand-light);
  transform: rotate(12deg) scale(1.06);
}

.menu-toggle {
  display: none;
}

/* ============ 移动端菜单 ============ */
.mobile-menu {
  display: none;
  position: fixed;
  top: 68px;
  left: 0;
  right: 0;
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  backdrop-filter: blur(20px) saturate(160%);
  border-bottom: 1px solid var(--border-color);
  z-index: 999;
  padding: 12px 20px 20px;
  box-shadow: var(--shadow-lg);
  max-height: calc(100vh - 68px);
  overflow-y: auto;
  animation: slideDown 0.3s ease;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.mobile-menu.open {
  display: block;
}

.mobile-menu a {
  display: block;
  padding: 12px 8px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 1rem;
  transition: color var(--transition), padding-left var(--transition);
}

.mobile-menu a:hover {
  color: var(--brand-secondary);
  padding-left: 14px;
}

.mobile-menu a:last-child {
  border-bottom: none;
}

/* ============ 面包屑 ============ */
.breadcrumb {
  padding: 16px 0 4px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb li::after {
  content: "/";
  color: var(--border-color);
}

.breadcrumb li:last-child::after {
  display: none;
}

.breadcrumb a {
  color: var(--text-muted);
}

.breadcrumb a:hover {
  color: var(--brand-secondary);
}

/* ============ 首屏 Hero ============ */
.hero {
  padding: 64px 0 56px;
  background:
    radial-gradient(circle at 12% 18%, rgba(201, 169, 110, 0.16), transparent 45%),
    radial-gradient(circle at 88% 82%, rgba(26, 42, 58, 0.12), transparent 50%),
    linear-gradient(135deg, var(--brand-light) 0%, var(--bg-body) 60%, var(--brand-light) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -120px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(201, 169, 110, 0.18), transparent 70%);
  pointer-events: none;
  animation: floatOrb 12s ease-in-out infinite;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -160px;
  left: -100px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(26, 42, 58, 0.1), transparent 70%);
  pointer-events: none;
  animation: floatOrb 15s ease-in-out infinite reverse;
}

@keyframes floatOrb {
  0%, 100% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(24px, -20px) scale(1.08);
  }
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content h1 {
  font-size: 2.4rem;
  line-height: 1.3;
  color: var(--brand-primary);
  margin-bottom: 18px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.hero-content h1 span {
  color: var(--brand-secondary);
  position: relative;
}

.hero-content h1 span::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 2px;
  width: 100%;
  height: 8px;
  background: linear-gradient(90deg, rgba(201, 169, 110, 0.35), transparent);
  border-radius: 4px;
  z-index: -1;
}

.hero-content .hero-lead {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.8;
}

.hero-content .hero-lead strong {
  color: var(--brand-primary);
  font-weight: 700;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 40px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  font-family: inherit;
  text-align: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-dark));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 8px 24px rgba(26, 42, 58, 0.25);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--brand-secondary), #b8945a);
  color: var(--brand-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(201, 169, 110, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--brand-primary);
  border-color: var(--brand-primary);
}

.btn-outline:hover {
  background: var(--brand-primary);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(26, 42, 58, 0.22);
}

.hero-stats {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

.stat-item {
  text-align: left;
}

.stat-number {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--brand-secondary);
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.hero-visual {
  position: relative;
}

.hero-visual svg {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-slow);
}

.hero-visual:hover svg {
  transform: translateY(-6px) scale(1.01);
}

/* ============ 轮播 ============ */
.carousel-section {
  padding: 20px 0 40px;
}

.carousel {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid var(--glass-border);
  min-height: 280px;
}

.carousel-track {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.carousel-slide {
  min-width: 100%;
  padding: 40px 36px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 12px;
}

.carousel-slide h3 {
  font-size: 1.5rem;
  color: var(--brand-primary);
  font-weight: 700;
}

.carousel-slide p {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 600px;
  line-height: 1.8;
}

.carousel-slide .slide-tag {
  display: inline-block;
  background: linear-gradient(135deg, var(--brand-light), var(--brand-accent));
  color: var(--brand-secondary);
  font-size: 0.8rem;
  padding: 4px 14px;
  border-radius: 20px;
  font-weight: 600;
  width: fit-content;
  border: 1px solid var(--border-color);
}

.carousel-nav {
  position: absolute;
  bottom: 18px;
  right: 24px;
  display: flex;
  gap: 8px;
}

.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-color);
  border: none;
  cursor: pointer;
  transition: background-color var(--transition), transform var(--transition), width var(--transition);
  padding: 0;
}

.carousel-dot.active {
  background: var(--brand-secondary);
  transform: scale(1.25);
  width: 26px;
  border-radius: 6px;
}

/* ============ 通用区块 ============ */
.section {
  padding: 64px 0;
}

.section-alt {
  background: var(--bg-section-alt);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 40px;
}

.section-header h2 {
  font-size: 1.9rem;
  color: var(--brand-primary);
  margin-bottom: 12px;
  font-weight: 800;
  letter-spacing: -0.3px;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.02rem;
  line-height: 1.8;
}

.section-header .sub-tag {
  display: inline-block;
  background: linear-gradient(135deg, var(--brand-light), var(--brand-accent));
  color: var(--brand-secondary);
  font-size: 0.82rem;
  padding: 4px 16px;
  border-radius: 20px;
  font-weight: 600;
  margin-bottom: 14px;
  border: 1px solid var(--border-color);
}

/* ============ 品牌介绍 ============ */
.brand-intro-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: start;
}

.brand-intro-text h3 {
  font-size: 1.4rem;
  color: var(--brand-primary);
  margin-bottom: 16px;
  font-weight: 700;
  position: relative;
  padding-left: 16px;
}

.brand-intro-text h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 4px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--brand-secondary), transparent);
}

.brand-intro-text p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 1rem;
  line-height: 1.9;
}

.brand-intro-text p strong {
  color: var(--brand-primary);
}

.brand-facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.fact-card {
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 18px;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

.fact-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: var(--brand-secondary);
}

.fact-card .fact-num {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--brand-secondary);
  line-height: 1.2;
}

.fact-card .fact-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ============ 产品/服务卡片 ============ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.card {
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-secondary), var(--brand-accent), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-5px);
  border-color: var(--brand-secondary);
}

.card:hover::before {
  transform: scaleX(1);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--brand-light), var(--brand-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-secondary);
  font-size: 1.4rem;
  border: 1px solid var(--border-color);
  transition: transform var(--transition);
}

.card:hover .card-icon {
  transform: scale(1.08) rotate(-4deg);
}

.card h3 {
  font-size: 1.15rem;
  color: var(--brand-primary);
  font-weight: 700;
}

.card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}

.card ul {
  margin-top: 4px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.card ul li {
  color: var(--text-secondary);
  font-size: 0.9rem;
  padding-left: 18px;
  position: relative;
}

.card ul li::before {
  content: "·";
  position: absolute;
  left: 4px;
  color: var(--brand-secondary);
  font-weight: 700;
  font-size: 1.2rem;
}

/* ============ 解决方案 ============ */
.solution-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
  margin-bottom: 32px;
}

.solution-block:last-child {
  margin-bottom: 0;
}

.solution-block.reverse {
  direction: rtl;
}

.solution-block.reverse > * {
  direction: ltr;
}

.solution-text h3 {
  font-size: 1.3rem;
  color: var(--brand-primary);
  margin-bottom: 12px;
  font-weight: 700;
}

.solution-text p {
  color: var(--text-secondary);
  margin-bottom: 14px;
  line-height: 1.9;
}

.solution-text ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.solution-text ul li {
  color: var(--text-secondary);
  font-size: 0.95rem;
  padding-left: 22px;
  position: relative;
}

.solution-text ul li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--brand-secondary);
  font-weight: 700;
}

.solution-visual svg {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
}

.solution-visual:hover svg {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

/* ============ 文章列表 ============ */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.article-card {
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
  position: relative;
}

.article-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-5px);
  border-color: var(--brand-secondary);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.article-meta .article-cat {
  background: linear-gradient(135deg, var(--brand-light), var(--brand-accent));
  color: var(--brand-secondary);
  padding: 2px 10px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.75rem;
  border: 1px solid var(--border-color);
}

.article-card h3 {
  font-size: 1.08rem;
  color: var(--brand-primary);
  font-weight: 700;
  line-height: 1.5;
  transition: color var(--transition);
}

.article-card:hover h3 {
  color: var(--brand-secondary);
}

.article-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.8;
  flex-grow: 1;
}

.article-card .read-more {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--brand-secondary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition), color var(--transition);
}

.article-card .read-more:hover {
  color: var(--brand-primary);
  gap: 10px;
}

/* ============ FAQ ============ */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.faq-item.open {
  border-color: var(--brand-secondary);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  cursor: pointer;
  font-weight: 600;
  color: var(--brand-primary);
  font-size: 1rem;
  transition: background-color var(--transition);
  background: transparent;
  border: none;
  width: 100%;
  text-align: left;
  font-family: inherit;
  line-height: 1.6;
}

.faq-question:hover {
  background: var(--brand-light);
}

.faq-question .faq-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-light), var(--brand-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-secondary);
  font-size: 1rem;
  font-weight: 700;
  transition: transform var(--transition);
  border: 1px solid var(--border-color);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: var(--brand-secondary);
  color: #fff;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 22px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.9;
}

.faq-item.open .faq-answer {
  max-height: 600px;
  padding: 0 22px 20px;
}

.faq-answer p {
  margin-bottom: 10px;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

/* ============ HowTo ============ */
.howto-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  counter-reset: step;
}

.howto-step {
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 22px;
  position: relative;
  counter-increment: step;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

.howto-step:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: var(--brand-secondary);
}

.howto-step::before {
  content: counter(step);
  position: absolute;
  top: -14px;
  left: 22px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-secondary), #b8945a);
  color: var(--brand-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.9rem;
  border: 3px solid var(--bg-body);
  box-shadow: 0 4px 12px rgba(201, 169, 110, 0.35);
}

.howto-step h4 {
  font-size: 1.05rem;
  color: var(--brand-primary);
  margin-bottom: 8px;
  margin-top: 8px;
  font-weight: 700;
}

.howto-step p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.8;
}

/* ============ 客户评价 ============ */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.testimonial-card {
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

.testimonial-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: var(--brand-secondary);
}

.testimonial-stars {
  color: var(--brand-secondary);
  font-size: 1rem;
  letter-spacing: 2px;
}

.testimonial-card blockquote {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.9;
  font-style: normal;
  flex-grow: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border-color);
  padding-top: 14px;
}

.testimonial-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-light), var(--brand-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--brand-secondary);
  font-size: 1rem;
  border: 1px solid var(--border-color);
  flex-shrink: 0;
}

.testimonial-author-info .name {
  font-weight: 700;
  color: var(--brand-primary);
  font-size: 0.92rem;
}

.testimonial-author-info .role {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ============ 联系我们 ============ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.contact-info-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-color);
  transition: transform var(--transition), box-shadow var(--transition);
}

.contact-info-item:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-sm);
}

.contact-info-item .ci-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--brand-light), var(--brand-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-secondary);
  font-size: 1.2rem;
  flex-shrink: 0;
  border: 1px solid var(--border-color);
}

.contact-info-item .ci-text .ci-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.contact-info-item .ci-text .ci-value {
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.98rem;
  word-break: break-all;
}

.contact-info-item .ci-text .ci-value a {
  color: var(--text-primary);
}

.contact-info-item .ci-text .ci-value a:hover {
  color: var(--brand-secondary);
}

/* ============ 页脚 ============ */
.site-footer {
  background:
    radial-gradient(circle at 85% 15%, rgba(201, 169, 110, 0.12), transparent 45%),
    linear-gradient(180deg, var(--brand-primary), var(--brand-dark));
  color: #c8c2b8;
  padding: 56px 0 24px;
  margin-top: 0;
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(201, 169, 110, 0.5), transparent);
}

[data-theme="dark"] .site-footer {
  background:
    radial-gradient(circle at 85% 15%, rgba(201, 169, 110, 0.08), transparent 45%),
    linear-gradient(180deg, #0a0a0a, #050505);
  color: #8a857c;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 36px;
  margin-bottom: 40px;
}

.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.2rem;
  color: #fff;
  margin-bottom: 14px;
}

.footer-brand .footer-logo svg {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.footer-brand p {
  font-size: 0.88rem;
  line-height: 1.8;
  color: #a8a29a;
  margin-bottom: 16px;
}

.footer-social {
  display: flex;
  gap: 10px;
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #c8c2b8;
  font-size: 0.9rem;
  transition: background-color var(--transition), color var(--transition), transform var(--transition);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-social a:hover {
  background: var(--brand-secondary);
  color: var(--brand-dark);
  transform: translateY(-3px);
}

.footer-col h4 {
  color: #fff;
  font-size: 0.98rem;
  margin-bottom: 16px;
  font-weight: 700;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col ul li a {
  color: #a8a29a;
  font-size: 0.88rem;
  transition: color var(--transition), padding-left var(--transition);
  display: inline-block;
}

.footer-col ul li a:hover {
  color: var(--brand-secondary);
  padding-left: 6px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.82rem;
  color: #8a857c;
}

.footer-bottom a {
  color: #8a857c;
}

.footer-bottom a:hover {
  color: var(--brand-secondary);
}

.footer-bottom-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ============ 返回顶部 ============ */
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-dark));
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition), background var(--transition);
  z-index: 900;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: linear-gradient(135deg, var(--brand-secondary), #b8945a);
  color: var(--brand-dark);
  transform: translateY(-4px) scale(1.06);
}

/* ============ 滚动动画 ============ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .brand-intro-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .solution-block {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .solution-block.reverse {
    direction: ltr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }
}

@media (max-width: 820px) {
  .nav-main {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .search-box input {
    width: 110px;
  }

  .hero-content h1 {
    font-size: 1.9rem;
  }

  .section-header h2 {
    font-size: 1.6rem;
  }

  .section {
    padding: 48px 0;
  }
}

@media (max-width: 600px) {
  .header-inner {
    height: 60px;
  }

  .mobile-menu {
    top: 60px;
  }

  .search-box {
    display: none;
  }

  .hero {
    padding: 40px 0 36px;
  }

  .hero-content h1 {
    font-size: 1.6rem;
  }

  .hero-stats {
    gap: 20px;
  }

  .stat-number {
    font-size: 1.4rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .carousel-slide {
    padding: 28px 22px;
  }

  .carousel-slide h3 {
    font-size: 1.2rem;
  }

  .back-to-top {
    bottom: 18px;
    right: 18px;
    width: 40px;
    height: 40px;
  }

  .brand-facts {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .fact-card {
    padding: 16px 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .hero::before,
  .hero::after {
    animation: none;
  }
}