:root {
  --banana-yellow: #f5a623;
  --banana-deep: #e8890c;
  --banana-light: #fff8e7;
  --banana-cream: #fffdf5;
  --banana-glow: rgba(245, 166, 35, 0.35);
  --text-dark: #2c2c2c;
  --text-medium: #4a4a4a;
  --text-light: #7a7a7a;
  --border-soft: #f0e6d2;
  --bg-white: #ffffff;
  --bg-glass: rgba(255, 253, 245, 0.72);
  --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 8px 32px rgba(245, 166, 35, 0.22);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 999px;
  --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background-color: var(--banana-cream);
  color: var(--text-dark);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--banana-deep);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--banana-yellow);
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

[id] {
  scroll-margin-top: 84px;
}

/* ========== 吸顶导航 · 毛玻璃 ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid rgba(240, 230, 210, 0.6);
  transition: var(--transition);
}

.site-header::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(245, 166, 35, 0.35), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.site-header:hover::after {
  opacity: 1;
}

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

.logo-area {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--text-dark);
  letter-spacing: -0.02em;
  flex-shrink: 0;
  transition: var(--transition);
}

.logo-area:hover {
  transform: scale(1.02);
}

.logo-area svg {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border-radius: 10px;
  transition: var(--transition-bounce);
}

.logo-area:hover svg {
  transform: rotate(-6deg) scale(1.08);
  box-shadow: var(--shadow-glow);
}

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

.main-nav a {
  position: relative;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  color: var(--text-medium);
  font-weight: 500;
  white-space: nowrap;
  transition: var(--transition);
}

.main-nav a::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-full);
  background: var(--banana-light);
  transform: scale(0.85);
  opacity: 0;
  transition: var(--transition);
  z-index: -1;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--banana-deep);
}

.main-nav a:hover::before,
.main-nav a.active::before {
  transform: scale(1);
  opacity: 1;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* 搜索框 */
.search-box {
  display: flex;
  align-items: center;
  background: var(--banana-light);
  border-radius: var(--radius-full);
  padding: 6px 6px 6px 16px;
  border: 1px solid var(--border-soft);
  transition: var(--transition);
}

.search-box:focus-within {
  border-color: var(--banana-yellow);
  box-shadow: 0 0 0 3px rgba(245, 166, 35, 0.15);
  background: var(--bg-white);
}

.search-box input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 0.9rem;
  width: 140px;
  color: var(--text-dark);
  font-family: inherit;
  transition: width 0.3s ease;
}

.search-box:focus-within input {
  width: 180px;
}

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

.search-box button {
  background: linear-gradient(135deg, var(--banana-yellow), var(--banana-deep));
  border: none;
  border-radius: var(--radius-full);
  padding: 6px 16px;
  cursor: pointer;
  color: #fff;
  font-weight: 600;
  font-size: 0.85rem;
  transition: var(--transition);
  white-space: nowrap;
}

.search-box button:hover {
  box-shadow: 0 4px 14px var(--banana-glow);
  transform: translateY(-1px);
}

.search-box button:active {
  transform: translateY(0) scale(0.97);
}

/* 主题切换 */
.theme-toggle {
  background: var(--banana-light);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-full);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
  color: var(--banana-deep);
}

.theme-toggle:hover {
  background: #f5e6c8;
  transform: rotate(18deg) scale(1.06);
  box-shadow: var(--shadow-glow);
}

.theme-toggle:active {
  transform: rotate(18deg) scale(0.96);
}

/* 移动菜单按钮 */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.mobile-menu-btn:hover {
  background: var(--banana-light);
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: var(--transition);
  transform-origin: center;
}

.mobile-menu-btn[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-menu-btn[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.mobile-menu-btn[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ========== 面包屑 ========== */
.breadcrumb {
  padding: 18px 0 0;
  font-size: 0.85rem;
  color: var(--text-light);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  align-items: center;
}

.breadcrumb li + li::before {
  content: "›";
  margin-right: 4px;
  color: var(--text-light);
  opacity: 0.6;
}

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

.breadcrumb a:hover {
  color: var(--banana-deep);
}

/* ========== Banner 轮播 · 渐变 ========== */
.banner-section {
  padding: 24px 0 0;
}

.banner-slider {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, #fff8e7 0%, #ffe9b8 55%, #ffd98a 100%);
  min-height: 320px;
  display: flex;
  align-items: center;
  box-shadow: var(--shadow-md);
  isolation: isolate;
}

.banner-slider::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.55) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

.banner-slider::after {
  content: "";
  position: absolute;
  bottom: -40%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(245, 166, 35, 0.18) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

.banner-slide {
  display: none;
  padding: 48px 56px;
  width: 100%;
  position: relative;
  z-index: 1;
}

.banner-slide.active {
  display: block;
  animation: bannerFadeIn 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes bannerFadeIn {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.banner-slide h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-dark);
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.banner-slide p {
  font-size: 1.05rem;
  color: var(--text-medium);
  max-width: 620px;
  margin-bottom: 26px;
  line-height: 1.75;
}

.banner-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--banana-yellow) 0%, var(--banana-deep) 100%);
  color: #fff;
  padding: 12px 28px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(245, 166, 35, 0.25);
}

.banner-btn svg {
  transition: transform 0.3s ease;
}

.banner-btn:hover {
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 10px 28px var(--banana-glow);
}

.banner-btn:hover svg {
  transform: translateX(4px);
}

.banner-btn:active {
  transform: translateY(-1px) scale(0.98);
}

.banner-dots {
  position: absolute;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 3;
}

.banner-dots button {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: none;
  background: rgba(0, 0, 0, 0.15);
  cursor: pointer;
  transition: var(--transition);
  padding: 0;
}

.banner-dots button:hover {
  background: rgba(0, 0, 0, 0.3);
}

.banner-dots button.active {
  background: var(--banana-yellow);
  width: 28px;
  border-radius: var(--radius-full);
  box-shadow: 0 2px 8px var(--banana-glow);
}

/* ========== 数字统计 ========== */
.stats-section {
  padding: 44px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.stat-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 30px 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-soft);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--banana-yellow), var(--banana-deep));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

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

.stat-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-5px);
  border-color: #f5d9a8;
}

.stat-number {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--banana-deep);
  letter-spacing: -0.03em;
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-top: 6px;
}

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

.section-header {
  text-align: center;
  margin-bottom: 44px;
}

.section-header h2 {
  font-size: 1.9rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
  color: var(--text-dark);
}

.section-header p {
  color: var(--text-light);
  font-size: 1rem;
  max-width: 640px;
  margin: 0 auto;
}

.section-badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--banana-light), #ffe9b8);
  color: var(--banana-deep);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 5px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 14px;
  letter-spacing: 0.04em;
  border: 1px solid rgba(245, 166, 35, 0.2);
}

/* ========== 品牌介绍 ========== */
.brand-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 52px;
  align-items: center;
}

.brand-intro-text h2 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.brand-intro-text p {
  color: var(--text-medium);
  margin-bottom: 16px;
  font-size: 0.98rem;
}

.brand-intro-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.brand-intro-visual svg {
  width: 100%;
  max-width: 380px;
  filter: drop-shadow(0 12px 32px rgba(245, 166, 35, 0.15));
  transition: var(--transition);
}

.brand-intro-visual:hover svg {
  transform: translateY(-6px) scale(1.02);
}

/* ========== 产品优势 ========== */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.advantage-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.advantage-card::after {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 140px;
  height: 140px;
  background: radial-gradient(circle, rgba(245, 166, 35, 0.1), transparent 70%);
  border-radius: 50%;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.advantage-card:hover::after {
  opacity: 1;
}

.advantage-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-6px);
  border-color: #f5d9a8;
}

.advantage-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--banana-light), #ffe9b8);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  transition: var(--transition-bounce);
}

.advantage-card:hover .advantage-icon {
  transform: scale(1.1) rotate(-5deg);
  box-shadow: var(--shadow-glow);
}

.advantage-icon svg {
  width: 28px;
  height: 28px;
}

.advantage-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.advantage-card p {
  font-size: 0.92rem;
  color: var(--text-medium);
  line-height: 1.75;
  position: relative;
  z-index: 1;
}

/* ========== 解决方案 ========== */
.solution-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.solution-item {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  gap: 18px;
  align-items: flex-start;
  position: relative;
  overflow: hidden;
}

.solution-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--banana-yellow), var(--banana-deep));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.4s ease;
}

.solution-item:hover::before {
  transform: scaleY(1);
}

.solution-item:hover {
  box-shadow: var(--shadow-md);
  border-color: #f5d9a8;
  transform: translateX(4px);
}

.solution-num {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--banana-yellow);
  line-height: 1;
  flex-shrink: 0;
  width: 40px;
  transition: var(--transition);
}

.solution-item:hover .solution-num {
  color: var(--banana-deep);
  transform: scale(1.1);
}

.solution-content h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.solution-content p {
  font-size: 0.92rem;
  color: var(--text-medium);
  line-height: 1.75;
}

/* ========== 文章列表 ========== */
.article-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.article-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 26px;
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.article-card::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--banana-yellow), var(--banana-deep));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.article-card:hover::after {
  transform: scaleX(1);
}

.article-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: #f5d9a8;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-light);
  margin-bottom: 10px;
}

.article-tag {
  background: linear-gradient(135deg, var(--banana-light), #ffe9b8);
  color: var(--banana-deep);
  padding: 3px 12px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.75rem;
  transition: var(--transition);
}

.article-card:hover .article-tag {
  box-shadow: 0 2px 8px var(--banana-glow);
}

.article-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.5;
}

.article-card h3 a {
  color: var(--text-dark);
}

.article-card h3 a:hover {
  color: var(--banana-deep);
}

.article-card p {
  font-size: 0.9rem;
  color: var(--text-medium);
  line-height: 1.75;
  flex: 1;
  margin-bottom: 16px;
}

.article-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--banana-deep);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: var(--transition);
}

.article-link:hover {
  gap: 10px;
  color: var(--banana-yellow);
}

/* ========== 客户评价 ========== */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.testimonial-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
}

.testimonial-card::before {
  content: "\201C";
  position: absolute;
  top: 12px;
  right: 22px;
  font-size: 4rem;
  line-height: 1;
  color: var(--banana-light);
  font-family: Georgia, serif;
  pointer-events: none;
  transition: var(--transition);
}

.testimonial-card:hover::before {
  color: #ffe9b8;
  transform: scale(1.1);
}

.testimonial-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: #f5d9a8;
}

.testimonial-stars {
  color: var(--banana-yellow);
  font-size: 0.95rem;
  letter-spacing: 3px;
  margin-bottom: 14px;
}

.testimonial-card blockquote {
  font-size: 0.92rem;
  color: var(--text-medium);
  line-height: 1.8;
  margin-bottom: 18px;
  font-style: normal;
  position: relative;
  z-index: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 10px;
}

.testimonial-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--banana-light), #ffe9b8);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--banana-deep);
  font-size: 0.9rem;
  flex-shrink: 0;
  transition: var(--transition-bounce);
}

.testimonial-card:hover .testimonial-avatar {
  transform: scale(1.1);
  box-shadow: var(--shadow-glow);
}

.testimonial-author strong {
  font-size: 0.9rem;
  display: block;
}

.testimonial-author span {
  font-size: 0.78rem;
  color: var(--text-light);
}

/* ========== FAQ ========== */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-soft);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: #f5d9a8;
  box-shadow: var(--shadow-sm);
}

.faq-item.open {
  border-color: var(--banana-yellow);
  box-shadow: var(--shadow-md);
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-dark);
  text-align: left;
  gap: 16px;
  transition: var(--transition);
}

.faq-question:hover {
  color: var(--banana-deep);
}

.faq-icon {
  width: 26px;
  height: 26px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  color: var(--banana-yellow);
  font-size: 1.3rem;
  font-weight: 300;
  border-radius: 50%;
  background: var(--banana-light);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease;
  padding: 0 24px;
}

.faq-item.open .faq-answer {
  max-height: 600px;
  padding: 0 24px 22px;
}

.faq-answer p {
  font-size: 0.92rem;
  color: var(--text-medium);
  line-height: 1.85;
}

/* ========== HowTo 教程 ========== */
.howto-steps {
  max-width: 820px;
  margin: 0 auto;
  counter-reset: step;
}

.howto-step {
  display: flex;
  gap: 20px;
  margin-bottom: 28px;
  position: relative;
}

.howto-step:last-child {
  margin-bottom: 0;
}

.howto-step-num {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--banana-yellow), var(--banana-deep));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  box-shadow: 0 4px 14px var(--banana-glow);
  transition: var(--transition-bounce);
}

.howto-step:hover .howto-step-num {
  transform: scale(1.12);
  box-shadow: 0 6px 22px var(--banana-glow);
}

.howto-step:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 48px;
  bottom: -28px;
  width: 2px;
  background: linear-gradient(180deg, var(--banana-yellow), var(--border-soft));
}

.howto-step-content h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.howto-step-content p {
  font-size: 0.92rem;
  color: var(--text-medium);
  line-height: 1.75;
}

/* ========== 联系信息 ========== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.contact-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.contact-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--banana-yellow), var(--banana-deep));
  border-radius: 0 0 4px 4px;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.contact-card:hover::before {
  opacity: 1;
}

.contact-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-5px);
  border-color: #f5d9a8;
}

.contact-card svg {
  width: 44px;
  height: 44px;
  margin: 0 auto 16px;
  transition: var(--transition-bounce);
}

.contact-card:hover svg {
  transform: scale(1.12) translateY(-3px);
}

.contact-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.contact-card p {
  font-size: 0.9rem;
  color: var(--text-medium);
  line-height: 1.75;
}

.contact-card a {
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
}

.contact-card a:hover {
  color: var(--banana-yellow);
}

/* ========== 页脚 ========== */
.site-footer {
  background: linear-gradient(180deg, #1f1a14 0%, #171310 100%);
  color: #b8a88e;
  padding: 60px 0 0;
  margin-top: 40px;
  position: relative;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(245, 166, 35, 0.4), transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand h3 {
  color: #fff;
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 14px;
}

.footer-brand p {
  font-size: 0.88rem;
  line-height: 1.8;
  margin-bottom: 16px;
  color: #9a8a72;
}

.footer-col h4 {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 10px;
}

.footer-col h4::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 2px;
  background: linear-gradient(90deg, var(--banana-yellow), transparent);
  border-radius: 2px;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  color: #9a8a72;
  font-size: 0.88rem;
  transition: var(--transition);
  display: inline-block;
}

.footer-col ul li a:hover {
  color: var(--banana-yellow);
  transform: translateX(4px);
}

.footer-bottom {
  padding: 26px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.82rem;
  color: #7a6a54;
}

.footer-bottom-links {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}

.footer-bottom-links a {
  color: #7a6a54;
  transition: var(--transition);
}

.footer-bottom-links a:hover {
  color: var(--banana-yellow);
}

/* ========== 返回顶部 ========== */
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--banana-yellow), var(--banana-deep));
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 18px var(--banana-glow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px) scale(0.9);
  transition: var(--transition);
  z-index: 999;
}

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

.back-to-top:hover {
  transform: translateY(-4px) scale(1.06);
  box-shadow: 0 8px 28px var(--banana-glow);
}

.back-to-top:active {
  transform: translateY(-2px) scale(0.98);
}

.back-to-top svg {
  width: 22px;
  height: 22px;
}

/* ========== 滚动动画 ========== */
.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: opacity, transform;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========== 暗黑模式 ========== */
body.dark {
  --banana-light: #2a2418;
  --banana-cream: #1a1610;
  --banana-glow: rgba(245, 166, 35, 0.3);
  --text-dark: #f0e8d8;
  --text-medium: #c8bca8;
  --text-light: #9a8a72;
  --border-soft: #3a3226;
  --bg-white: #221e16;
  --bg-glass: rgba(26, 22, 16, 0.78);
  --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
}

body.dark .site-header {
  background: var(--bg-glass);
  border-bottom-color: rgba(58, 50, 38, 0.6);
}

body.dark .banner-slider {
  background: linear-gradient(135deg, #2a2418 0%, #3a3226 55%, #4a3e28 100%);
}

body.dark .banner-slider::before {
  background: radial-gradient(circle, rgba(245, 166, 35, 0.08) 0%, transparent 70%);
}

body.dark .banner-slider::after {
  background: radial-gradient(circle, rgba(245, 166, 35, 0.1) 0%, transparent 70%);
}

body.dark .banner-dots button {
  background: rgba(255, 255, 255, 0.15);
}

body.dark .banner-dots button.active {
  background: var(--banana-yellow);
}

body.dark .site-footer {
  background: linear-gradient(180deg, #0f0d0a 0%, #0a0806 100%);
}

body.dark .stat-number {
  color: var(--banana-yellow);
}

body.dark .advantage-icon {
  background: linear-gradient(135deg, #2a2418, #3a3226);
}

body.dark .testimonial-avatar {
  background: linear-gradient(135deg, #2a2418, #3a3226);
}

body.dark .faq-icon {
  background: #2a2418;
}

body.dark .faq-item.open .faq-icon {
  background: var(--banana-yellow);
}

body.dark .section-badge {
  background: linear-gradient(135deg, #2a2418, #3a3226);
  border-color: rgba(245, 166, 35, 0.15);
}

body.dark .article-tag {
  background: linear-gradient(135deg, #2a2418, #3a3226);
}

body.dark .search-box {
  background: #2a2418;
}

body.dark .search-box:focus-within {
  background: #221e16;
}

body.dark .theme-toggle {
  background: #2a2418;
}

body.dark .theme-toggle:hover {
  background: #3a3226;
}

body.dark .mobile-menu-btn:hover {
  background: #2a2418;
}

body.dark .mobile-menu-btn span {
  background: var(--text-dark);
}

body.dark .main-nav a::before {
  background: #2a2418;
}

/* ========== 响应式 992px ========== */
@media (max-width: 992px) {
  .brand-intro {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .brand-intro-visual {
    order: -1;
  }

  .advantage-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .banner-slide {
    padding: 40px 40px;
  }

  .banner-slide h2 {
    font-size: 1.75rem;
  }
}

/* ========== 响应式 768px ========== */
@media (max-width: 768px) {
  .main-nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--bg-white);
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid var(--border-soft);
    box-shadow: var(--shadow-md);
    gap: 4px;
    animation: navSlideDown 0.3s ease;
  }

  @keyframes navSlideDown {
    from {
      opacity: 0;
      transform: translateY(-8px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .main-nav.open {
    display: flex;
  }

  .main-nav a {
    width: 100%;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
  }

  .main-nav a::before {
    border-radius: var(--radius-sm);
  }

  .mobile-menu-btn {
    display: flex;
  }

  .search-box {
    display: none;
  }

  .banner-slide {
    padding: 32px 24px;
  }

  .banner-slide h2 {
    font-size: 1.5rem;
  }

  .banner-slide p {
    font-size: 0.95rem;
  }

  .banner-slider {
    min-height: 280px;
  }

  .advantage-grid {
    grid-template-columns: 1fr;
  }

  .solution-list {
    grid-template-columns: 1fr;
  }

  .article-grid {
    grid-template-columns: 1fr;
  }

  .testimonial-grid {
    grid-template-columns: 1fr;
  }

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

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .section {
    padding: 48px 0;
  }

  .section-header h2 {
    font-size: 1.5rem;
  }

  .section-header {
    margin-bottom: 32px;
  }

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

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

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
  }

  .howto-step {
    gap: 16px;
  }

  .howto-step-num {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }

  .howto-step:not(:last-child)::before {
    left: 19px;
  }
}

/* ========== 响应式 480px ========== */
@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .stat-number {
    font-size: 1.8rem;
  }

  .banner-slide h2 {
    font-size: 1.3rem;
  }

  .banner-slide p {
    font-size: 0.9rem;
  }

  .banner-btn {
    padding: 10px 22px;
    font-size: 0.9rem;
  }

  .container {
    padding: 0 16px;
  }

  .header-inner {
    height: 60px;
  }

  .logo-area {
    font-size: 1.1rem;
  }

  .logo-area svg {
    width: 32px;
    height: 32px;
  }

  .main-nav {
    top: 60px;
  }

  .section {
    padding: 40px 0;
  }

  .section-header h2 {
    font-size: 1.35rem;
  }

  .advantage-card {
    padding: 24px 20px;
  }

  .solution-item {
    padding: 22px 20px;
  }

  .article-card {
    padding: 22px 20px;
  }

  .testimonial-card {
    padding: 24px 20px;
  }

  .contact-card {
    padding: 26px 20px;
  }

  .faq-question {
    padding: 16px 18px;
    font-size: 0.95rem;
  }

  .faq-answer {
    padding: 0 18px;
  }

  .faq-item.open .faq-answer {
    padding: 0 18px 18px;
  }

  .footer-grid {
    padding-bottom: 32px;
  }

  .footer-bottom-links {
    gap: 14px;
  }
}

/* ========== 减少动画偏好 ========== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .fade-up {
    opacity: 1;
    transform: none;
  }
}

/* ========== 打印样式 ========== */
@media print {
  .site-header,
  .back-to-top,
  .banner-dots,
  .theme-toggle,
  .mobile-menu-btn {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  .banner-slider {
    background: #f5f5f5;
    box-shadow: none;
  }

  .fade-up {
    opacity: 1;
    transform: none;
  }
}