/* ========== 月月鸟飞科技 - 主样式文件 ========== */
:root {
  --primary: #1a6fff;
  --primary-dark: #0e4fc4;
  --primary-light: #e8f0ff;
  --accent: #00c8aa;
  --accent-dark: #00a38a;
  --text-dark: #1a1f36;
  --text-mid: #4a5568;
  --text-light: #8896a5;
  --bg-page: #f4f7fc;
  --bg-white: #ffffff;
  --border: #e2e8f0;
  --shadow-sm: 0 2px 8px rgba(26,111,255,.08);
  --shadow-md: 0 8px 30px rgba(26,111,255,.12);
  --shadow-lg: 0 20px 60px rgba(26,111,255,.16);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: .25s ease;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: var(--bg-page);
  color: var(--text-dark);
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ====== 通用 ====== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 88px 0; }
.section-sm { padding: 56px 0; }

.badge {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .05em;
  padding: 4px 12px;
  border-radius: 20px;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
}
.section-sub {
  font-size: 16px;
  color: var(--text-mid);
  max-width: 600px;
}
.section-header { text-align: center; margin-bottom: 56px; }
.section-header .section-sub { margin: 0 auto; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 40px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 16px rgba(26,111,255,.35); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(26,111,255,.45); }
.btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-accent { background: var(--accent); color: #fff; box-shadow: 0 4px 16px rgba(0,200,170,.35); }
.btn-accent:hover { background: var(--accent-dark); transform: translateY(-2px); }
.btn-white { background: #fff; color: var(--primary); box-shadow: 0 4px 16px rgba(0,0,0,.12); }
.btn-white:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,.18); }

/* ====== 顶部导航 ====== */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,.6);
  transition: box-shadow var(--transition);
}
#navbar.scrolled { box-shadow: var(--shadow-md); }
.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  height: 68px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 800;
  color: var(--primary);
  flex-shrink: 0;
}
.logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 20px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  margin-left: 28px;
}
.nav-actions { margin-left: auto; }
.nav-links a {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-mid);
  transition: color var(--transition);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: var(--primary); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-actions .btn { padding: 10px 22px; font-size: 14px; }

/* 移动菜单按钮 */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}
.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-dark);
  transition: var(--transition);
  border-radius: 2px;
}

/* ====== Hero 区 ====== */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 68px;
  background: linear-gradient(135deg, #e8f0ff 0%, #f0fff9 50%, #fff 100%);
  position: relative;
  overflow: hidden;
}
#hero::before {
  content: '';
  position: absolute;
  top: -100px; right: -100px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(26,111,255,.08), transparent 70%);
  pointer-events: none;
}
#hero::after {
  content: '';
  position: absolute;
  bottom: -80px; left: -80px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(0,200,170,.08), transparent 70%);
  pointer-events: none;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding: 80px 0;
}
.hero-eyebrow {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.hero-eyebrow::before {
  content: '';
  display: inline-block;
  width: 28px;
  height: 3px;
  background: var(--primary);
  border-radius: 2px;
}
.hero-title {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 20px;
}
.hero-title span { color: var(--primary); }
.hero-desc {
  font-size: 17px;
  color: var(--text-mid);
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 480px;
}
.hero-ctas { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats {
  display: flex;
  gap: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.stat-item .num {
  font-size: 32px;
  font-weight: 900;
  color: var(--primary);
  line-height: 1;
}
.stat-item .label { font-size: 13px; color: var(--text-light); margin-top: 4px; }

/* Hero 右侧动态图 */
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-device {
  width: 340px;
  height: 440px;
  background: linear-gradient(145deg, #fff, #f0f4ff);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 20px;
  position: relative;
  z-index: 2;
  border: 1px solid rgba(255,255,255,.8);
}
.device-screen {
  width: 100%;
  height: 100%;
  background: linear-gradient(145deg, #1a6fff, #00c8aa);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  gap: 16px;
}
.device-icon { font-size: 64px; }
.device-text { color: #fff; font-weight: 700; font-size: 18px; text-align: center; }
.device-sub { color: rgba(255,255,255,.8); font-size: 13px; text-align: center; }
.device-pill {
  background: rgba(255,255,255,.2);
  color: #fff;
  font-size: 12px;
  padding: 6px 14px;
  border-radius: 20px;
  margin-top: 8px;
}
.float-card {
  position: absolute;
  background: #fff;
  border-radius: var(--radius);
  padding: 12px 16px;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  animation: float 3s ease-in-out infinite;
  border: 1px solid var(--border);
}
.float-card:nth-child(2) { top: 30px; right: -20px; animation-delay: 0s; }
.float-card:nth-child(3) { bottom: 60px; left: -30px; animation-delay: 1.5s; }
.float-icon { font-size: 20px; }
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ====== 服务板块 ====== */
#services { background: var(--bg-white); }
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.service-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transition: transform var(--transition);
  transform-origin: left;
}
.service-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); border-color: var(--primary-light); }
.service-card:hover::before { transform: scaleX(1); }
.service-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: 24px;
}
.ic-blue { background: linear-gradient(135deg, #e8f0ff, #c7d8ff); }
.ic-green { background: linear-gradient(135deg, #e0fdf7, #b3f0e6); }
.ic-purple { background: linear-gradient(135deg, #f3e8ff, #dbb6ff); }
.ic-orange { background: linear-gradient(135deg, #fff3e0, #ffd199); }
.service-title { font-size: 20px; font-weight: 800; margin-bottom: 12px; }
.service-desc { font-size: 14px; color: var(--text-mid); line-height: 1.75; margin-bottom: 20px; }
.service-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  font-size: 12px;
  background: var(--bg-page);
  color: var(--text-mid);
  padding: 4px 10px;
  border-radius: 6px;
  font-weight: 600;
}

/* ====== 产品商城 ====== */
#products { background: var(--bg-page); }
.products-filter {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}
.filter-btn {
  padding: 10px 24px;
  border-radius: 40px;
  font-size: 14px;
  font-weight: 600;
  border: 2px solid var(--border);
  background: #fff;
  color: var(--text-mid);
  cursor: pointer;
  transition: var(--transition);
}
.filter-btn.active, .filter-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}
.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.product-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.product-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.product-img {
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 64px;
  position: relative;
}
.product-badge-sale {
  position: absolute;
  top: 12px;
  right: 12px;
  background: #ff4d4f;
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
}
.product-badge-new {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--accent);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
}
.product-body { padding: 16px 18px 18px; }
.product-cat { font-size: 11px; color: var(--text-light); font-weight: 600; text-transform: uppercase; letter-spacing: .05em; margin-bottom: 6px; }
.product-name { font-size: 15px; font-weight: 700; margin-bottom: 8px; line-height: 1.4; }
.product-desc { font-size: 13px; color: var(--text-mid); margin-bottom: 14px; line-height: 1.5; }
.product-footer { display: flex; align-items: center; justify-content: space-between; }
.product-price { display: flex; align-items: baseline; gap: 4px; }
.price-now { font-size: 20px; font-weight: 800; color: #e53e3e; }
.price-unit { font-size: 12px; color: var(--text-light); }
.price-old { font-size: 12px; color: var(--text-light); text-decoration: line-through; }
.buy-btn {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}
.buy-btn:hover { background: var(--primary-dark); }

/* ====== 支付流程 ====== */
#payment { background: var(--bg-white); }
.pay-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.pay-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  width: 140px;
}
.pay-step-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  position: relative;
  z-index: 1;
}
.pay-step:nth-child(1) .pay-step-icon { background: #e8f0ff; }
.pay-step:nth-child(3) .pay-step-icon { background: #e0fdf7; }
.pay-step:nth-child(5) .pay-step-icon { background: #fff3e0; }
.pay-step:nth-child(7) .pay-step-icon { background: #f3e8ff; }
.pay-step:nth-child(9) .pay-step-icon { background: #e8f5e9; }
.pay-step-label { font-size: 13px; font-weight: 700; text-align: center; color: var(--text-dark); }
.pay-arrow {
  font-size: 20px;
  color: var(--primary);
  margin: 0 4px;
  margin-bottom: 24px;
}
.pay-alipay {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}
.alipay-card {
  background: linear-gradient(135deg, #1677ff, #0066cc);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 28px 36px;
  text-align: center;
  min-width: 200px;
}
.alipay-logo { font-size: 40px; margin-bottom: 8px; }
.alipay-name { font-size: 18px; font-weight: 800; }
.alipay-sub { font-size: 13px; opacity: .8; margin-top: 4px; }

/* ====== 案例展示 ====== */
#cases { background: var(--bg-page); }
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.case-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.case-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.case-cover {
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 72px;
  position: relative;
}
.case-cover-tag {
  position: absolute;
  bottom: 12px;
  left: 12px;
  background: rgba(0,0,0,.5);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 6px;
  backdrop-filter: blur(4px);
}
.case-body { padding: 20px; }
.case-industry {
  font-size: 12px;
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.case-title { font-size: 17px; font-weight: 800; margin-bottom: 8px; }
.case-desc { font-size: 13px; color: var(--text-mid); line-height: 1.6; margin-bottom: 16px; }
.case-metrics { display: flex; gap: 20px; }
.metric { }
.metric .val { font-size: 20px; font-weight: 800; color: var(--primary); }
.metric .key { font-size: 12px; color: var(--text-light); margin-top: 2px; }

/* ====== 内容发布平台 ====== */
#content-hub { background: var(--bg-white); }
.hub-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.hub-channels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.channel-card {
  background: var(--bg-page);
  border-radius: var(--radius);
  padding: 20px;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.channel-card:hover { border-color: var(--primary); background: var(--primary-light); }
.channel-icon { font-size: 28px; margin-bottom: 10px; }
.channel-name { font-size: 14px; font-weight: 700; margin-bottom: 4px; }
.channel-stat { font-size: 12px; color: var(--text-light); }
.publish-panel {
  background: var(--bg-page);
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid var(--border);
}
.publish-panel h4 { font-size: 17px; font-weight: 800; margin-bottom: 20px; }
.form-group { margin-bottom: 16px; }
.form-label { font-size: 13px; font-weight: 700; color: var(--text-mid); margin-bottom: 6px; display: block; }
.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  background: #fff;
  color: var(--text-dark);
  transition: border-color var(--transition);
}
.form-textarea { resize: vertical; min-height: 80px; }
.form-input:focus, .form-select:focus, .form-textarea:focus { border-color: var(--primary); outline: none; }
.channel-check-group { display: flex; flex-wrap: wrap; gap: 10px; }
.channel-check {
  display: flex;
  align-items: center;
  gap: 6px;
  background: #fff;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  padding: 7px 12px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.channel-check input { accent-color: var(--primary); }
.channel-check:hover { border-color: var(--primary); background: var(--primary-light); }

/* ====== 关于我们 ====== */
#about { background: linear-gradient(135deg, #0e4fc4 0%, #1a6fff 50%, #00c8aa 100%); color: #fff; }
.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
#about .section-title { color: #fff; }
#about .section-sub { color: rgba(255,255,255,.8); max-width: 480px; }
.about-features { display: flex; flex-direction: column; gap: 16px; margin-top: 32px; }
.about-feature {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: rgba(255,255,255,.1);
  border-radius: var(--radius);
  padding: 16px 20px;
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255,255,255,.15);
}
.feat-icon { font-size: 24px; flex-shrink: 0; margin-top: 2px; }
.feat-info h5 { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.feat-info p { font-size: 13px; color: rgba(255,255,255,.75); line-height: 1.6; }
.about-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.about-metric-card {
  background: rgba(255,255,255,.12);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  border: 1px solid rgba(255,255,255,.18);
  backdrop-filter: blur(4px);
}
.ab-num { font-size: 36px; font-weight: 900; line-height: 1; }
.ab-unit { font-size: 16px; font-weight: 700; }
.ab-label { font-size: 13px; color: rgba(255,255,255,.7); margin-top: 6px; }

/* ====== 联系我们 ====== */
#contact { background: var(--bg-page); }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 48px;
  align-items: start;
}
.contact-info { display: flex; flex-direction: column; gap: 20px; }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: #fff;
  border-radius: var(--radius);
  padding: 20px;
  border: 1px solid var(--border);
}
.contact-ic { font-size: 24px; flex-shrink: 0; }
.contact-details h5 { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.contact-details p { font-size: 14px; color: var(--text-mid); line-height: 1.6; }
.contact-form {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 36px;
  border: 1px solid var(--border);
}
.contact-form h4 { font-size: 20px; font-weight: 800; margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ====== 页脚 ====== */
#footer {
  background: var(--text-dark);
  color: rgba(255,255,255,.7);
  padding: 60px 0 24px;
}
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,.1);
  margin-bottom: 28px;
}
.footer-brand .logo { color: #fff; margin-bottom: 16px; }
.footer-brand p { font-size: 13px; line-height: 1.7; color: rgba(255,255,255,.55); max-width: 260px; }
.footer-col h5 { font-size: 14px; font-weight: 700; color: #fff; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 13px; color: rgba(255,255,255,.55); transition: color var(--transition); }
.footer-col ul li a:hover { color: #fff; }
.footer-qr {
  width: 80px;
  height: 80px;
  background: #fff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  margin-bottom: 10px;
}
.footer-qr-label { font-size: 12px; color: rgba(255,255,255,.5); text-align: center; }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
}
.footer-icp a { color: rgba(255,255,255,.45); }
.footer-icp a:hover { color: #fff; }

/* ====== 购物车侧边栏 ====== */
.cart-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}
.cart-overlay.open { opacity: 1; pointer-events: all; }
.cart-panel {
  position: fixed;
  top: 0; right: -420px;
  width: 420px;
  height: 100vh;
  background: #fff;
  z-index: 2001;
  transition: right .35s ease;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
}
.cart-overlay.open .cart-panel { right: 0; }
.cart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}
.cart-header h3 { font-size: 18px; font-weight: 800; }
.cart-close { background: none; border: none; font-size: 20px; cursor: pointer; color: var(--text-mid); padding: 4px; }
.cart-items { flex: 1; overflow-y: auto; padding: 16px 24px; }
.cart-empty { text-align: center; padding: 60px 0; color: var(--text-light); font-size: 15px; }
.cart-empty-icon { font-size: 48px; margin-bottom: 12px; }
.cart-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.cart-item-img { width: 56px; height: 56px; background: var(--bg-page); border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 28px; flex-shrink: 0; }
.cart-item-info { flex: 1; }
.cart-item-name { font-size: 14px; font-weight: 700; margin-bottom: 4px; }
.cart-item-price { font-size: 15px; font-weight: 800; color: #e53e3e; }
.cart-qty {
  display: flex;
  align-items: center;
  gap: 8px;
}
.qty-btn { width: 28px; height: 28px; border: 1.5px solid var(--border); background: #fff; border-radius: 6px; cursor: pointer; font-size: 16px; display: flex; align-items: center; justify-content: center; transition: var(--transition); }
.qty-btn:hover { border-color: var(--primary); color: var(--primary); }
.qty-num { font-size: 14px; font-weight: 700; width: 24px; text-align: center; }
.cart-footer { padding: 20px 24px; border-top: 1px solid var(--border); }
.cart-total { display: flex; justify-content: space-between; font-size: 17px; font-weight: 800; margin-bottom: 16px; }
.cart-total span:last-child { color: #e53e3e; }

/* ====== 支付弹窗 ====== */
.pay-modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}
.pay-modal.open { opacity: 1; pointer-events: all; }
.pay-modal-inner {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 36px;
  width: 440px;
  max-width: 95vw;
  text-align: center;
  transform: scale(.95);
  transition: transform var(--transition);
}
.pay-modal.open .pay-modal-inner { transform: scale(1); }
.pay-modal-title { font-size: 20px; font-weight: 800; margin-bottom: 8px; }
.pay-modal-sub { font-size: 14px; color: var(--text-mid); margin-bottom: 28px; }
.pay-amount { font-size: 40px; font-weight: 900; color: #e53e3e; margin-bottom: 24px; }
.pay-amount span { font-size: 20px; }
.alipay-qr {
  width: 160px;
  height: 160px;
  background: linear-gradient(135deg, #1677ff 0%, #0066cc 100%);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  position: relative;
}
.alipay-qr-inner { font-size: 80px; }
.pay-tips { font-size: 13px; color: var(--text-light); margin-bottom: 24px; }
.pay-tips strong { color: var(--primary); }
.pay-actions { display: flex; gap: 12px; justify-content: center; }

/* ====== Toast ====== */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--text-dark);
  color: #fff;
  padding: 12px 24px;
  border-radius: 40px;
  font-size: 14px;
  font-weight: 600;
  z-index: 9999;
  transition: transform .35s ease;
  pointer-events: none;
  white-space: nowrap;
}
.toast.show { transform: translateX(-50%) translateY(0); }
.toast.success { background: var(--accent); }
.toast.error { background: #e53e3e; }

/* ====== 响应式 ====== */
@media (max-width: 1100px) {
  .products-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
  .services-grid { grid-template-columns: 1fr 1fr; }
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { display: none; }
  .about-inner { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .hub-layout { grid-template-columns: 1fr; }
  .nav-links, .nav-actions .btn-outline { display: none; }
  .menu-toggle { display: flex; }
}
@media (max-width: 640px) {
  .products-grid { grid-template-columns: 1fr 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .pay-flow { gap: 0; }
  .form-row { grid-template-columns: 1fr; }
  .hero-stats { gap: 24px; }
  .about-metrics { grid-template-columns: 1fr 1fr; }
  .cart-panel { width: 100%; }
}

/* ====== 动画 ====== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(28px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-in { animation: fadeInUp .6s ease both; }
.delay-1 { animation-delay: .1s; }
.delay-2 { animation-delay: .2s; }
.delay-3 { animation-delay: .3s; }
.delay-4 { animation-delay: .4s; }