/* ============================================================
   思亿欧外贸快车 - 全站样式
   ============================================================ */

:root {
  --primary: #1a56db;
  --primary-dark: #1042b5;
  --primary-light: #4a86ff;
  --secondary: #0ea5e9;
  --accent: #f59e0b;
  --text: #1e293b;
  --text-secondary: #475569;
  --text-light: #94a3b8;
  --bg: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-dark: #0f172a;
  --border: #e2e8f0;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-hover: 0 8px 40px rgba(26,86,219,0.15);
  --transition: all 0.3s ease;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: var(--transition); }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
  line-height: 1.3;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(26,86,219,0.35);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.6);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.15);
  border-color: #fff;
}

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

.btn-lg { padding: 16px 36px; font-size: 1.05rem; border-radius: 10px; }
.btn-sm { padding: 8px 18px; font-size: 0.9rem; }

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.header.scrolled {
  box-shadow: 0 2px 20px rgba(0,0,0,0.1);
}

.header-inner {
  display: flex;
  align-items: center;
  height: 72px;
  gap: 32px;
}

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

.logo-icon { font-size: 1.6rem; }

.logo-img {
  height: 36px;
  width: auto;
  object-fit: contain;
}

.logo-text {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}

.logo-sub {
  display: block;
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--text-secondary);
}

.nav { flex: 1; }

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  white-space: nowrap;
}

.nav-link:hover, .nav-link.active {
  color: var(--primary);
  background: rgba(26,86,219,0.08);
}

.arrow { font-size: 0.75rem; }

.nav-dropdown { position: relative; }

/* 透明桥接区：鼠标从导航项滑到下拉菜单时不中断 hover */
.nav-dropdown::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  height: 12px; /* 桥接 nav-link 和 dropdown 之间的空隙 */
  background: transparent;
}

.dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-width: 200px;
  padding: 8px;
  list-style: none;
  box-shadow: 0 8px 30px rgba(0,0,0,0.12);
  z-index: 100;
  /* 防止鼠标移出时立即关闭：显示 0ms，隐藏 200ms 延迟 */
  animation: fadeIn 0.15s ease;
}

.nav-dropdown:hover .dropdown-menu { display: block; }

/* 隐藏延迟：通过伪元素保持 hover 区域 */
.nav-dropdown:not(:hover) .dropdown-menu {
  display: none;
  transition-delay: 0s;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.dropdown-menu li a {
  display: block;
  padding: 10px 14px;
  font-size: 0.92rem;
  color: var(--text);
  border-radius: var(--radius-sm);
}

.dropdown-menu li a:hover {
  color: var(--primary);
  background: rgba(26,86,219,0.06);
}

.header-cta {
  background: var(--primary);
  color: #fff !important;
  padding: 10px 20px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.92rem;
  flex-shrink: 0;
}

.header-cta:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #0f172a 0%, #1a3a6b 50%, #1a56db 100%);
  overflow: hidden;
  padding-top: 72px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-bg::before {
  content: '';
  position: absolute;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(26,86,219,0.3), transparent 70%);
  top: -200px; right: -100px;
  border-radius: 50%;
}

.hero-bg::after {
  content: '';
  position: absolute;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(14,165,233,0.2), transparent 70%);
  bottom: -100px; left: -50px;
  border-radius: 50%;
}

.hero-particles {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px),
    radial-gradient(circle, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 60px 60px, 30px 30px;
  background-position: 0 0, 15px 15px;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 60px 24px;
}

.hero-badge {
  display: inline-block;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.9);
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 0.88rem;
  margin-bottom: 28px;
  backdrop-filter: blur(10px);
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.6rem);
  font-weight: 900;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 20px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: rgba(255,255,255,0.8);
  margin-bottom: 48px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 800px;
  margin: 0 auto 48px;
}

.stat-item {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius);
  padding: 20px 16px;
  backdrop-filter: blur(10px);
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: #fff;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-number span {
  font-size: 1.1rem;
  font-weight: 600;
}

.stat-label {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.3;
}

.hero-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.6);
  font-size: 0.8rem;
  z-index: 2;
}

.scroll-arrow {
  width: 20px; height: 20px;
  border-right: 2px solid rgba(255,255,255,0.6);
  border-bottom: 2px solid rgba(255,255,255,0.6);
  transform: rotate(45deg);
  animation: scrollBounce 1.5s infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: rotate(45deg) translateY(0); }
  50% { transform: rotate(45deg) translateY(4px); }
}

/* ===== 痛点区 ===== */
.pain-section { background: var(--bg-secondary); }

.pain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.pain-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px 24px;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.pain-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(26,86,219,0.2);
}

.pain-icon { font-size: 2rem; margin-bottom: 14px; }

.pain-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
}

.pain-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.pain-bottom {
  text-align: center;
  background: linear-gradient(135deg, #fff5f5, #fff);
  border: 1px solid rgba(239,68,68,0.15);
  border-radius: var(--radius-lg);
  padding: 32px 40px;
}

.pain-quote {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.pain-quote strong { color: #dc2626; }

.pain-cta {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* ===== 解决方案 ===== */
.solution-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

.solution-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.solution-card:hover {
  background: var(--primary);
  border-color: var(--primary);
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.solution-card:hover h3,
.solution-card:hover p,
.solution-card:hover .solution-link { color: #fff; }

.solution-icon { font-size: 2.2rem; }

.solution-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
}

.solution-card p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.solution-link {
  font-size: 0.85rem;
  color: var(--primary);
  font-weight: 600;
  margin-top: auto;
}

/* ===== 核心优势 ===== */
.advantage-section { background: var(--bg-secondary); }

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.advantage-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px 24px;
  border: 1px solid var(--border);
  position: relative;
  transition: var(--transition);
}

.advantage-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(26,86,219,0.3);
}

.advantage-num {
  font-size: 2.5rem;
  font-weight: 900;
  color: rgba(26,86,219,0.1);
  position: absolute;
  top: 16px; right: 20px;
  line-height: 1;
}

.advantage-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
}

.advantage-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 12px;
}

.advantage-badge {
  display: inline-block;
  background: rgba(26,86,219,0.08);
  color: var(--primary);
  border: 1px solid rgba(26,86,219,0.2);
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
}

.guarantee-badge {
  background: rgba(16,185,129,0.08);
  color: #059669;
  border-color: rgba(16,185,129,0.2);
}

/* ===== 荣誉资质 ===== */
.honors-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.honor-card {
  text-align: center;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: var(--transition);
}

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

.honor-img {
  width: 100%;
  height: 200px;
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 16px;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.honor-img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.honor-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}

.honor-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ===== 成交喜报 ===== */
.deals-section {
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%);
  overflow: hidden;
}

.deals-section .section-title { color: #fff; }
.deals-section .section-subtitle { color: rgba(255,255,255,0.7); }

.deals-scroll {
  overflow: hidden;
  position: relative;
  margin: 0 -24px;
  padding: 0 24px;
}

.deals-track {
  display: flex;
  gap: 20px;
  animation: scrollDeals 30s linear infinite;
  width: max-content;
}

.deals-track:hover { animation-play-state: paused; }

@keyframes scrollDeals {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.deal-card {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius);
  padding: 20px;
  width: 280px;
  flex-shrink: 0;
  backdrop-filter: blur(10px);
  position: relative;
}

.deal-badge {
  position: absolute;
  top: -10px; left: 16px;
  background: var(--accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 50px;
}

.deal-img {
  width: 100%;
  height: 140px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 14px;
  background: rgba(255,255,255,0.05);
}

.deal-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.deal-img-text {
  width: 100%;
  height: 140px;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  background: rgba(26,86,219,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
}

.deal-amount {
  font-size: 2rem;
  font-weight: 900;
  color: var(--accent);
}

.deal-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}

.deal-info p {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.5;
}

/* ===== 合作水单 ===== */
.receipts-section { background: var(--bg-secondary); }

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

.receipt-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  transition: var(--transition);
  border-top: 3px solid var(--primary);
}

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

.receipt-region {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.receipt-amount {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 6px;
}

.receipt-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  padding: 4px 10px;
  border-radius: 50px;
  display: inline-block;
}

.receipts-note {
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-light);
  margin-top: 16px;
}

/* ===== 成功案例区 ===== */
.cases-preview-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

.case-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
  background: #fff;
}

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

.case-img {
  width: 100%;
  height: 240px;
  overflow: hidden;
}

.case-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.case-card:hover .case-img img { transform: scale(1.05); }

/* 堆叠长图布局：取消固定高度，让多张图自然纵向排列 */
.case-img-stack {
  height: auto;
  overflow: visible;
}
.case-img-stack img {
  height: auto;
  object-fit: unset;
  transition: none;
}
.case-img-stack img:first-child {
  border-radius: 8px 8px 0 0;
}
.case-img-stack img:last-child {
  border-radius: 0 0 8px 8px;
}
.case-card:hover .case-img-stack img {
  transform: none;
}

.case-body {
  padding: 20px 24px;
}

.case-tag {
  background: rgba(26,86,219,0.08);
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 50px;
  display: inline-block;
  margin-bottom: 10px;
}

.case-body h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.case-body p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 14px;
  line-height: 1.6;
}

.case-stats {
  display: flex;
  gap: 20px;
}

.case-stats span {
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.case-stats strong { color: var(--primary); }

/* ===== 锦旗墙 ===== */
.banners-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.banner-card {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
  background: #fff;
}

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

.banner-img {
  width: 100%;
  height: 220px;
  overflow: hidden;
}

.banner-img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 12px;
  background: var(--bg-secondary);
}

.banner-body {
  padding: 16px 20px;
}

.banner-body p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  font-style: italic;
}

/* ===== 适用行业 ===== */
.industry-section { background: var(--bg-secondary); }

.industry-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  max-width: 900px;
  margin: 0 auto;
}

.industry-tag {
  background: #fff;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 18px;
  border-radius: 50px;
  font-size: 0.92rem;
  transition: var(--transition);
  cursor: default;
}

.industry-tag:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-2px);
}

/* ===== 服务流程 ===== */
.flow-steps {
  display: flex;
  gap: 0;
  position: relative;
  counter-reset: steps;
}

.flow-steps::before {
  content: '';
  position: absolute;
  top: 36px; left: 10%;
  width: 80%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  z-index: 0;
}

.flow-step {
  flex: 1;
  text-align: center;
  padding: 0 16px;
  position: relative;
  z-index: 1;
}

.step-circle {
  width: 72px; height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  font-size: 1.4rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  box-shadow: 0 4px 16px rgba(26,86,219,0.35);
}

.flow-step h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.flow-step p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== CTA Section ===== */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, #0ea5e9 100%);
  padding: 80px 0;
  text-align: center;
}

.cta-section .section-title { color: #fff; }
.cta-section .section-subtitle { color: rgba(255,255,255,0.85); margin-bottom: 40px; }

.cta-form-wrap {
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-lg);
  padding: 40px;
  max-width: 700px;
  margin: 0 auto;
}

.cta-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.cta-form .form-full { grid-column: 1 / -1; }

.form-input, .form-select {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.15);
  color: #fff;
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  transition: var(--transition);
}

.form-input::placeholder { color: rgba(255,255,255,0.6); }
.form-select option { background: var(--text); color: #fff; }

.form-input:focus, .form-select:focus {
  border-color: rgba(255,255,255,0.7);
  background: rgba(255,255,255,0.2);
}

.btn-white {
  background: #fff;
  color: var(--primary);
  border-color: #fff;
  font-weight: 700;
}

.btn-white:hover {
  background: rgba(255,255,255,0.9);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

/* ===== Footer ===== */
.footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.7);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
  display: block;
}

.footer-desc {
  font-size: 0.88rem;
  line-height: 1.8;
  margin-bottom: 20px;
  color: rgba(255,255,255,0.6);
}

.footer-contact p {
  font-size: 0.88rem;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.6);
  transition: var(--transition);
}

.footer-links a:hover { color: #fff; }

.footer-divider {
  border: none;
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-bottom: 24px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.4);
}

/* ===== 子页面通用 Banner ===== */
.page-banner {
  background: linear-gradient(135deg, #0f172a 0%, #1a3a6b 100%);
  padding: 120px 0 60px;
  text-align: center;
}

.page-banner h1 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 900;
  color: #fff;
  margin-bottom: 16px;
}

.page-banner p {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.8);
  max-width: 600px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 0.88rem;
}

.breadcrumb a { color: rgba(255,255,255,0.6); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb span { color: rgba(255,255,255,0.4); }

/* ===== 产品对比表格 ===== */
.compare-table {
  width: 100%;
  border-collapse: collapse;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.compare-table th {
  background: var(--primary);
  color: #fff;
  padding: 16px 20px;
  text-align: center;
  font-weight: 700;
  font-size: 0.95rem;
}

.compare-table th:first-child { text-align: left; }

.compare-table td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  font-size: 0.92rem;
  color: var(--text-secondary);
  text-align: center;
}

.compare-table td:first-child {
  text-align: left;
  font-weight: 600;
  color: var(--text);
}

.compare-table tr:last-child td { border-bottom: none; }
.compare-table tr:nth-child(even) td { background: var(--bg-secondary); }

.check { color: #10b981; font-size: 1.1rem; }
.cross { color: #ef4444; font-size: 1.1rem; }
.warn { color: var(--accent); font-size: 1.1rem; }

/* ===== 保证承诺框 ===== */
.guarantee-box {
  background: linear-gradient(135deg, #ecfdf5, #d1fae5);
  border: 2px solid #10b981;
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
}

.guarantee-box h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #065f46;
  margin-bottom: 24px;
}

.guarantee-items {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.guarantee-item {
  background: #fff;
  border-radius: var(--radius);
  padding: 20px;
  border: 1px solid rgba(16,185,129,0.2);
}

.guarantee-item .g-num {
  font-size: 2.2rem;
  font-weight: 900;
  color: #059669;
  margin-bottom: 6px;
}

.guarantee-item p {
  font-size: 0.88rem;
  color: #047857;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-q {
  padding: 20px 24px;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  user-select: none;
}

.faq-q span { color: var(--primary); font-size: 1.2rem; }

.faq-a {
  padding: 0 24px 20px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
  display: none;
}

.faq-item.active .faq-a { display: block; }
.faq-item.active .faq-q { color: var(--primary); }

/* ===== 响应式 ===== */
@media (max-width: 1100px) {
  .solution-grid { grid-template-columns: repeat(3, 1fr); }
  .advantage-grid { grid-template-columns: repeat(2, 1fr); }
  .receipts-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
}

@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .section-title { font-size: 1.5rem; }

  .nav, .header-cta { display: none; }
  .mobile-menu-btn { display: flex; }

  .nav.mobile-open {
    display: block;
    position: fixed;
    top: 72px; left: 0; right: 0; bottom: 0;
    background: #fff;
    padding: 16px;
    overflow-y: auto;
    z-index: 999;
  }

  .nav.mobile-open .nav-list {
    flex-direction: column;
    gap: 0;
  }

  .nav.mobile-open .dropdown-menu {
    display: block;
    position: static;
    box-shadow: none;
    border: none;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    margin-top: 4px;
    padding: 4px;
  }

  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .pain-grid { grid-template-columns: 1fr; }
  .solution-grid { grid-template-columns: 1fr 1fr; }
  .advantage-grid { grid-template-columns: 1fr; }
  .honors-grid { grid-template-columns: 1fr; }
  .cases-preview-grid { grid-template-columns: 1fr; }
  .banners-grid { grid-template-columns: 1fr; }
  .receipts-grid { grid-template-columns: 1fr 1fr; }
  .flow-steps { flex-direction: column; }
  .flow-steps::before { display: none; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .cta-form { grid-template-columns: 1fr; }
  .hero-title { font-size: 2rem; }
  .guarantee-items { grid-template-columns: 1fr; }
}

/* ============================================================
   博客页面样式
   ============================================================ */

/* 分类筛选按钮 */
.blog-filter-btn {
  padding: 8px 20px;
  border: 2px solid var(--border);
  border-radius: 30px;
  background: #fff;
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
}
.blog-filter-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.blog-filter-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* 博客列表 */
.blog-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 28px;
}

/* 博客卡片 */
.blog-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  transition: all 0.3s ease;
  text-decoration: none;
  color: inherit;
}
.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}

/* 博客卡片图片区 */
.blog-card-img {
  position: relative;
  height: 200px;
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.blog-card-img-placeholder {
  font-size: 3.5rem;
  opacity: 0.9;
}
.blog-card-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(255,255,255,0.95);
  color: var(--primary);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  z-index: 1;
}

/* 博客卡片正文 */
.blog-card-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.blog-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 10px;
  color: var(--text);
  transition: color 0.3s ease;
}
.blog-card:hover .blog-card-title {
  color: var(--primary);
}
.blog-card-excerpt {
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 16px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.blog-card-meta {
  display: flex;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--text-light);
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

/* 文章正文样式 */
.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 36px 0 16px;
  color: var(--text);
  padding-left: 12px;
  border-left: 4px solid var(--primary);
}
.article-content h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 24px 0 12px;
  color: var(--text);
}
.article-content p {
  margin-bottom: 16px;
  color: var(--text-secondary);
}
.article-content ul, .article-content ol {
  margin-bottom: 16px;
  padding-left: 24px;
  color: var(--text-secondary);
}
.article-content li {
  margin-bottom: 8px;
  line-height: 1.8;
}
.article-content strong {
  color: var(--text);
  font-weight: 600;
}

/* 响应式 */
@media (max-width: 768px) {
  .blog-list { grid-template-columns: 1fr; }
  .article-content { font-size: 0.95rem; }
  .article-content h2 { font-size: 1.3rem; }
}