/* ===== 乐宠宠物用品 - 设计系统变量 ===== */
:root {
  /* 主色系 */
  --color-primary: #58A6FF;
  --color-primary-light: #A5D4FF;
  --color-primary-dark: #2E7ACC;
  --color-secondary: #FFB366;
  --color-secondary-light: #FFD4A8;
  --color-secondary-dark: #E89430;
  --color-accent: #73D13D;
  --color-accent-light: #B5EF8A;
  --color-accent-dark: #4EA82A;

  /* 中性色 */
  --color-bg: #F7F9FA;
  --color-bg-card: #FFFFFF;
  --color-text-muted: #86909C;
  --color-text-dark: #272E3B;
  --color-border: #E8ECF0;
  --color-divider: #F0F3F5;

  /* 字体 */
  --font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-weight-bold: 700;
  --font-weight-medium: 500;
  --font-weight-regular: 400;

  /* 间距 */
  --section-py: 2.5rem;
  --section-py-md: 4rem;
  --container-px: 1rem;
  --container-px-md: 2rem;

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* 阴影 */
  --shadow-card: 0 2px 12px rgba(39,46,59,0.06);
  --shadow-card-hover: 0 8px 24px rgba(39,46,59,0.12);
  --shadow-btn: 0 2px 8px rgba(88,166,255,0.2);
  --shadow-float: 0 4px 16px rgba(39,46,59,0.1);

  /* 动效 */
  --duration-fast: 230ms;
  --duration-normal: 280ms;
  --duration-slow: 330ms;
  --ease-out: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-in-out: cubic-bezier(0.42, 0, 0.58, 1);
}

@media (min-width: 768px) {
  :root {
    --section-py: var(--section-py-md);
    --container-px: var(--container-px-md);
  }
}

/* ===== 基础重置 ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-weight: var(--font-weight-regular);
  color: var(--color-text-dark);
  background-color: var(--color-bg);
  line-height: 1.65;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.3px;
  line-height: 1.3;
  color: var(--color-text-dark);
}

h1 { font-size: 2.75rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

@media (max-width: 768px) {
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.25rem; }
  h4 { font-size: 1.125rem; }
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

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

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

ul, ol {
  list-style: none;
}

/* ===== 容器 ===== */
.container {
  max-width: 80rem;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-px);
  padding-right: var(--container-px);
}

/* ===== 区块 ===== */
.section {
  padding-top: var(--section-py);
  padding-bottom: var(--section-py);
}

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

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-family);
  font-weight: var(--font-weight-medium);
  font-size: 0.9375rem;
  line-height: 1;
  padding: 0.75rem 1.75rem;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-out),
              background-color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-btn);
}

.btn-primary {
  background-color: var(--color-primary);
  color: #FFFFFF;
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
}

.btn-secondary {
  background-color: var(--color-secondary);
  color: #FFFFFF;
}

.btn-secondary:hover {
  background-color: var(--color-secondary-dark);
}

.btn-accent {
  background-color: var(--color-accent);
  color: #FFFFFF;
}

.btn-accent:hover {
  background-color: var(--color-accent-dark);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary);
  color: #FFFFFF;
}

.btn-lg {
  padding: 1rem 2.25rem;
  font-size: 1rem;
}

.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: 0.8125rem;
}

/* ===== 卡片 ===== */
.card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

.card-body {
  padding: 1.25rem;
}

/* ===== 标签 ===== */
.tag {
  display: inline-flex;
  align-items: center;
  font-size: 0.75rem;
  font-weight: var(--font-weight-medium);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  line-height: 1.4;
}

.tag-primary {
  background-color: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.tag-secondary {
  background-color: var(--color-secondary-light);
  color: var(--color-secondary-dark);
}

.tag-accent {
  background-color: var(--color-accent-light);
  color: var(--color-accent-dark);
}

/* ===== 头部导航 ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--duration-normal) var(--ease-out);
}

.navbar.scrolled {
  box-shadow: var(--shadow-float);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-weight: var(--font-weight-bold);
  font-size: 1.375rem;
  color: var(--color-text-dark);
}

.navbar-logo .logo-icon {
  width: 2.25rem;
  height: 2.25rem;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: #fff;
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.navbar-links a {
  font-size: 0.9375rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  padding: 0.25rem 0;
  position: relative;
  transition: color var(--duration-fast) var(--ease-out);
}

.navbar-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
  transition: width var(--duration-normal) var(--ease-out);
}

.navbar-links a:hover,
.navbar-links a.active {
  color: var(--color-primary);
}

.navbar-links a.active::after,
.navbar-links a:hover::after {
  width: 100%;
}

.navbar-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-text-dark);
  cursor: pointer;
  padding: 0.25rem;
}

@media (max-width: 768px) {
  .navbar-links {
    position: fixed;
    top: 4rem;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(8px);
    flex-direction: column;
    align-items: flex-start;
    padding: 1.5rem 2rem;
    gap: 1.25rem;
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity var(--duration-normal) var(--ease-out),
                transform var(--duration-normal) var(--ease-out);
  }

  .navbar-links.open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .navbar-links a {
    font-size: 1.125rem;
    width: 100%;
    padding: 0.75rem 0;
  }

  .navbar-toggle {
    display: block;
  }
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 32rem;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-bg) 50%, var(--color-secondary-light) 100%);
}

.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 50%;
  height: 80%;
  background: radial-gradient(circle, rgba(88,166,255,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 36rem;
}

.hero h1 {
  margin-bottom: 1rem;
}

.hero h1 span {
  color: var(--color-primary);
}

.hero-desc {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-decor {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 45%;
  max-width: 28rem;
  z-index: 1;
  opacity: 0.85;
}

@media (max-width: 768px) {
  .hero {
    min-height: auto;
    padding-top: 3rem;
    padding-bottom: 3rem;
  }

  .hero-decor {
    display: none;
  }

  .hero-content {
    max-width: 100%;
  }
}

/* ===== 区块标题 ===== */
.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-header h2 {
  margin-bottom: 0.75rem;
}

.section-header .section-sub {
  color: var(--color-text-muted);
  font-size: 1rem;
  max-width: 32rem;
  margin-left: auto;
  margin-right: auto;
}

.section-header .section-line {
  display: inline-block;
  width: 3rem;
  height: 3px;
  background: var(--color-primary);
  border-radius: 2px;
  margin-top: 1rem;
}

/* ===== 产品网格 ===== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

@media (max-width: 768px) {
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }
}

@media (max-width: 360px) {
  .product-grid {
    grid-template-columns: 1fr;
  }
}

.product-card {
  position: relative;
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

.product-card .card-img {
  height: 12rem;
  background: var(--color-divider);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  position: relative;
  overflow: hidden;
}

.product-card .card-img::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3rem;
  background: linear-gradient(to top, rgba(255,255,255,0.6), transparent);
}

.product-card .card-info {
  padding: 1.25rem;
}

.product-card .card-info h4 {
  font-size: 1.0625rem;
  margin-bottom: 0.5rem;
}

.product-card .card-info p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ===== 特性区块 ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

@media (max-width: 768px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }
}

@media (max-width: 360px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }
}

.feature-item {
  text-align: center;
  padding: 2rem 1rem;
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: transform var(--duration-normal) var(--ease-out);
}

.feature-item:hover {
  transform: translateY(-3px);
}

.feature-icon {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  font-size: 1.5rem;
}

.feature-icon.blue { background: var(--color-primary-light); color: var(--color-primary-dark); }
.feature-icon.orange { background: var(--color-secondary-light); color: var(--color-secondary-dark); }
.feature-icon.green { background: var(--color-accent-light); color: var(--color-accent-dark); }

.feature-item h4 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.feature-item p {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* ===== 数字统计 ===== */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

@media (max-width: 768px) {
  .stats-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }
}

.stat-item {
  text-align: center;
  padding: 1.5rem;
}

.stat-num {
  font-size: 2.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  line-height: 1.1;
  margin-bottom: 0.25rem;
}

.stat-num .unit {
  font-size: 1rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* ===== 时间线 ===== */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0.75rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-primary-light);
}

.timeline-item {
  position: relative;
  padding-bottom: 2rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -1.5rem;
  top: 0.25rem;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  background: var(--color-primary);
  border: 2px solid var(--color-primary-light);
}

.timeline-item .year {
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  font-size: 1.125rem;
  margin-bottom: 0.25rem;
}

.timeline-item .desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ===== 案例网格 ===== */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

@media (max-width: 768px) {
  .case-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
}

.case-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform var(--duration-normal) var(--ease-out);
}

.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

.case-card .case-img {
  height: 10rem;
  background: var(--color-divider);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
}

.case-card .case-body {
  padding: 1.25rem;
}

.case-card .case-body h4 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.case-card .case-body p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* ===== 表单 ===== */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-dark);
  margin-bottom: 0.375rem;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.9375rem;
  font-family: var(--font-family);
  color: var(--color-text-dark);
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
  outline: none;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(88,166,255,0.15);
}

.form-textarea {
  min-height: 6rem;
  resize: vertical;
}

/* ===== 悬浮客服 ===== */
.float-service {
  position: fixed;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.float-item {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-float);
  cursor: pointer;
  font-size: 1.125rem;
  transition: transform var(--duration-fast) var(--ease-out),
              background-color var(--duration-fast) var(--ease-out);
}

.float-item:hover {
  transform: scale(1.08);
  background: var(--color-primary-light);
}

.float-item .float-tooltip {
  position: absolute;
  right: calc(100% + 0.5rem);
  top: 50%;
  transform: translateY(-50%) scale(0.9);
  opacity: 0;
  pointer-events: none;
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-float);
  padding: 0.75rem 1rem;
  white-space: nowrap;
  font-size: 0.8125rem;
  color: var(--color-text-dark);
  transition: opacity var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out);
}

.float-item:hover .float-tooltip {
  opacity: 1;
  transform: translateY(-50%) scale(1);
  pointer-events: auto;
}

.float-item .float-tooltip.wechat-qr {
  width: 8rem;
  height: 8rem;
  padding: 0.5rem;
  white-space: normal;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
}

.float-item .float-tooltip.wechat-qr .qr-placeholder {
  width: 7rem;
  height: 7rem;
  background: var(--color-divider);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.625rem;
  color: var(--color-text-muted);
}

@media (max-width: 768px) {
  .float-service {
    right: 0.5rem;
  }

  .float-item {
    width: 2.25rem;
    height: 2.25rem;
    font-size: 0.875rem;
  }
}

/* ===== 页脚 ===== */
.footer {
  background: var(--color-text-dark);
  color: rgba(255,255,255,0.8);
  padding-top: 3rem;
  padding-bottom: 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 2rem;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }
}

@media (max-width: 360px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-weight: var(--font-weight-bold);
  font-size: 1.25rem;
  color: #fff;
  margin-bottom: 1rem;
}

.footer-logo .logo-icon {
  width: 2rem;
  height: 2rem;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: #fff;
}

.footer-desc {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.5);
  line-height: 1.6;
  max-width: 20rem;
}

.footer h5 {
  font-size: 1rem;
  color: #fff;
  margin-bottom: 1rem;
  font-weight: var(--font-weight-medium);
}

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.5);
  transition: color var(--duration-fast) var(--ease-out);
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-top: 2rem;
  padding-top: 1.25rem;
  text-align: center;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.35);
}

/* ===== 动效工具 ===== */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

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

.fade-in {
  opacity: 0;
  transition: opacity var(--duration-slow) var(--ease-out);
}

.fade-in.visible {
  opacity: 1;
}

/* ===== 宠物装饰元素 ===== */
.pet-paw {
  display: inline-block;
  width: 1.25rem;
  height: 1.25rem;
  position: relative;
}

.pet-paw::before {
  content: '🐾';
  font-size: 1rem;
  line-height: 1;
}

/* ===== 背景装饰 ===== */
.bg-dots {
  background-image: radial-gradient(circle, var(--color-border) 1px, transparent 1px);
  background-size: 1.5rem 1.5rem;
}

/* ===== 页面banner ===== */
.page-banner {
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-bg) 60%, var(--color-secondary-light) 100%);
  padding: 4rem 0 3rem;
  text-align: center;
  position: relative;
}

.page-banner::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3rem;
  background: var(--color-bg);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.page-banner h1 {
  position: relative;
  z-index: 2;
  color: var(--color-text-dark);
}

.page-banner h1 span {
  color: var(--color-primary);
}

.page-banner .banner-sub {
  position: relative;
  z-index: 2;
  color: var(--color-text-muted);
  font-size: 1rem;
  margin-top: 0.5rem;
}

/* ===== 响应式工具 ===== */
.hidden-mobile {
  display: block;
}

@media (max-width: 768px) {
  .hidden-mobile {
    display: none;
  }
}

.visible-mobile {
  display: none;
}

@media (max-width: 768px) {
  .visible-mobile {
    display: block;
  }
}