:root {
  --color-primary: #3A7CA5;
  --color-primary-dark: #2A5F80;
  --color-primary-light: #EAF2F8;
  --color-accent: #C07A4A;
  --color-accent-light: #F5E6DA;
  --color-bg: #F6F8FA;
  --color-white: #FFFFFF;
  --color-title: #1F2B36;
  --color-body: #3E4C59;
  --color-muted: #7B8A99;
  --color-border: #E5EAF0;
  --color-border-deep: #DCE4EB;
  --color-dark-bg: #1C2B3A;
  --color-dark-text: #C9D4DE;
  --color-success: #5BA37A;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 14px;
  --shadow-sm: 0 4px 16px rgba(42, 95, 128, 0.06);
  --shadow-md: 0 8px 30px rgba(42, 95, 128, 0.1);
  --shadow-lg: 0 10px 30px rgba(42, 95, 128, 0.12);
  --nav-height: 72px;
  --spacer-lg: 5rem;
  --spacer-md: 3rem;
  --spacer-sm: 1.5rem;
  --font-size-h1: 2.75rem;
  --font-size-h2: 2rem;
  --font-size-h3: 1.125rem;
  --font-size-body: 1rem;
  --transition-base: all 0.3s ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: var(--font-size-body);
  line-height: 1.75;
  color: var(--color-body);
  background-color: var(--color-bg);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: var(--transition-base);
}

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

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* 导航 */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.4);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  z-index: 1000;
  transition: var(--transition-base);
}

.site-nav.scrolled {
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 6px 24px rgba(31, 43, 54, 0.08);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-title);
  white-space: nowrap;
}

.nav-logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  border-radius: 10px;
  color: #fff;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  margin: 0;
}

.nav-links li a {
  color: var(--color-body);
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  padding: 0.25rem 0;
}

.nav-links li a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width 0.3s ease;
}

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

.nav-links li a.active {
  color: var(--color-primary);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-search {
  background: transparent;
  border: none;
  color: var(--color-body);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 0.5rem;
  transition: var(--transition-base);
}

.nav-search:hover {
  color: var(--color-primary);
}

.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  font-size: 1.3rem;
  color: var(--color-title);
  cursor: pointer;
  padding: 0.5rem;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition-base);
  line-height: 1.5;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
  color: #fff;
  box-shadow: 0 8px 20px rgba(42, 95, 128, 0.25);
}

.btn-primary:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(58, 124, 165, 0.3);
}

.btn-primary:active {
  transform: translateY(1px);
}

.btn-outline-light {
  background: transparent;
  border: 1.5px solid rgba(255, 255, 255, 0.8);
  color: #fff;
}

.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  transform: translateY(-2px);
}

.btn-outline-light:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
}

.btn-outline-light:active {
  transform: translateY(1px);
}

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

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

.btn-outline-primary:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(58, 124, 165, 0.3);
}

.btn-outline-primary:active {
  transform: translateY(1px);
}

.btn-block {
  width: 100%;
}

/* 徽章 */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.85rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 500;
  line-height: 1.6;
}

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

.badge-accent {
  background: var(--color-accent);
  color: #fff;
}

.badge-light {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  backdrop-filter: blur(4px);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 640px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-image: linear-gradient(rgba(22, 44, 66, 0.65), rgba(22, 44, 66, 0.35)), url('/assets/images/backpic/back-1.jpg');
  background-size: cover;
  background-position: center;
  padding: calc(var(--nav-height) + 3rem) 1.5rem 4rem;
}

.hero-content {
  max-width: 960px;
  margin: 0 auto;
  text-align: center;
  width: 100%;
}

.hero h1 {
  font-size: var(--font-size-h1);
  font-weight: 700;
  line-height: 1.3;
  color: #fff;
  margin: 0 0 1.25rem;
  letter-spacing: 0.02em;
}

.hero h1 .highlight {
  color: var(--color-accent);
}

.hero-subtitle {
  font-size: 1.125rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.9);
  max-width: 680px;
  margin: 0 auto 2.25rem;
}

.hero-search {
  display: flex;
  max-width: 560px;
  margin: 0 auto 2rem;
  background: #fff;
  border-radius: 999px;
  overflow: hidden;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.18);
}

.hero-search .search-icon {
  display: flex;
  align-items: center;
  padding-left: 1.25rem;
  color: var(--color-muted);
  font-size: 0.95rem;
}

.hero-search input {
  flex: 1;
  border: none;
  padding: 0.85rem 0.5rem 0.85rem 0.75rem;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--color-title);
  outline: none;
  background: transparent;
  height: 52px;
}

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

.hero-search .btn-primary {
  border-radius: 999px;
  margin: 5px;
  height: 42px;
  padding: 0 1.5rem;
  flex-shrink: 0;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 2rem;
}

.hero-badges {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* 指标看板 */
.stats-section {
  padding: var(--spacer-lg) 0;
  background-color: var(--color-primary-light);
}

.section-head {
  text-align: center;
  margin-bottom: var(--spacer-md);
}

.section-head h2 {
  font-size: var(--font-size-h2);
  font-weight: 700;
  color: var(--color-title);
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0 0 0.5rem;
  line-height: 1.35;
}

.section-head h2::before {
  content: '';
  width: 4px;
  height: 1.6em;
  background: var(--color-primary);
  border-radius: 2px;
  display: inline-block;
}

.section-head p {
  color: var(--color-muted);
  max-width: 560px;
  margin: 0 auto;
  font-size: 0.95rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.stat-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: 2rem 1.25rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-base);
}

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

.stat-card .stat-icon {
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
  display: block;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1.2;
  margin-bottom: 0.35rem;
}

.stat-label {
  font-size: 0.9rem;
  color: #5A6B7A;
}

/* 服务矩阵 */
.matrix-section {
  padding: var(--spacer-lg) 0;
  background-color: var(--color-white);
}

.matrix-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.matrix-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-base);
  display: flex;
  flex-direction: column;
}

.matrix-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-top: 2px solid var(--color-primary);
  border-top-left-radius: var(--radius-md);
  border-top-right-radius: var(--radius-md);
  border-top-color: var(--color-primary);
}

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

.matrix-media {
  height: 160px;
  overflow: hidden;
  position: relative;
}

.matrix-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.matrix-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(22, 44, 66, 0.15));
  transition: var(--transition-base);
}

.matrix-card:hover .matrix-media::after {
  background: linear-gradient(180deg, transparent 40%, rgba(22, 44, 66, 0.25));
}

.matrix-body {
  padding: 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.matrix-body h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-title);
  margin: 0 0 0.5rem;
}

.matrix-body p {
  font-size: 0.85rem;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 0.75rem;
  flex: 1;
}

.matrix-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.matrix-link {
  color: var(--color-primary);
  font-size: 0.85rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--transition-base);
}

.matrix-link:hover {
  color: var(--color-primary-dark);
}

.matrix-card:hover .matrix-link {
  transform: translateX(4px);
}

/* 结果对比 */
.compare-section {
  padding: var(--spacer-lg) 0;
  background-color: #F0F4F7;
}

.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.compare-card {
  background: var(--color-white);
  border: 1px solid var(--color-border-deep);
  border-radius: var(--radius-md);
  padding: 2rem 1.75rem;
  position: relative;
}

.compare-card.recommended {
  border-color: var(--color-accent);
  box-shadow: 0 4px 20px rgba(192, 122, 74, 0.12);
}

.compare-badge {
  position: absolute;
  top: -14px;
  right: 20px;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.25rem 0.9rem;
  border-radius: 999px;
  box-shadow: 0 4px 12px rgba(192, 122, 74, 0.25);
}

.compare-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-title);
  margin: 0 0 1.25rem;
}

.compare-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  padding: 0.4rem 0;
  font-size: 0.9rem;
  color: var(--color-body);
  line-height: 1.6;
}

.compare-list li i {
  margin-top: 0.25rem;
  flex-shrink: 0;
}

.compare-list li i.fa-xmark {
  color: #B0BCC8;
  font-size: 0.85rem;
}

.compare-list li i.fa-check {
  color: var(--color-accent);
  font-size: 0.9rem;
}

.compare-cta {
  text-align: center;
  margin-top: 2.5rem;
}

/* 内容资讯 */
.content-section {
  padding: var(--spacer-lg) 0;
  background-color: var(--color-white);
}

.content-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 2.5rem;
  align-items: start;
}

.content-list .content-item {
  display: flex;
  gap: 1.25rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition-base);
}

.content-list .content-item:hover {
  transform: translateX(4px);
}

.content-item img {
  width: 180px;
  height: 108px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.content-item-info h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-title);
  margin: 0 0 0.4rem;
  transition: var(--transition-base);
}

.content-item-info h3 a {
  color: var(--color-title);
}

.content-item-info h3 a:hover {
  color: var(--color-primary);
}

.content-item-info p {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin: 0 0 0.4rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.content-item-meta {
  font-size: 0.75rem;
  color: var(--color-muted);
  display: flex;
  gap: 1rem;
  align-items: center;
}

.content-item-meta .tag {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  font-size: 0.7rem;
}

.sidebar-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.25rem;
}

.sidebar-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-title);
  margin: 0 0 1rem;
  position: relative;
  padding-left: 0.875rem;
}

.sidebar-card h3::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 1.1em;
  background: var(--color-primary);
  border-radius: 2px;
}

.sidebar-list li {
  padding: 0.35rem 0;
  border-bottom: 1px dashed var(--color-border);
  font-size: 0.85rem;
}

.sidebar-list li:last-child {
  border-bottom: none;
}

.sidebar-list li a {
  color: var(--color-body);
  display: block;
  line-height: 1.6;
  transition: var(--transition-base);
}

.sidebar-list li a:hover {
  color: var(--color-primary);
  padding-left: 4px;
}

/* 热门推荐 */
.cover-num {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1.2;
  text-align: center;
  margin-bottom: 0.5rem;
}

.cover-num-label {
  font-size: 0.85rem;
  color: var(--color-muted);
  text-align: center;
}

/* 场景演示 */
.demo-section {
  padding: var(--spacer-lg) 0;
  background-color: var(--color-primary-light);
}

.demo-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

.demo-visual {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.demo-visual img {
  width: 100%;
  display: block;
  height: 300px;
  object-fit: cover;
}

.demo-content h2 {
  font-size: var(--font-size-h2);
  font-weight: 700;
  color: var(--color-title);
  margin: 0 0 0.5rem;
  line-height: 1.35;
  position: relative;
  padding-left: 0.875rem;
}

.demo-content h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 1.6em;
  background: var(--color-primary);
  border-radius: 2px;
}

.demo-content p {
  color: var(--color-muted);
  margin-bottom: 1.5rem;
}

.demo-steps {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.demo-step {
  display: flex;
  gap: 0.875rem;
  align-items: flex-start;
  background: var(--color-white);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  transition: var(--transition-base);
}

.demo-step:hover {
  box-shadow: var(--shadow-sm);
  border-color: var(--color-primary);
}

.demo-step-num {
  width: 32px;
  height: 32px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 600;
  flex-shrink: 0;
}

.demo-step-text h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-title);
  margin: 0 0 0.15rem;
}

.demo-step-text p {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin: 0;
}

/* FAQ */
.faq-section {
  padding: var(--spacer-lg) 0;
  background-color: var(--color-white);
}

.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.accordion-item {
  background: var(--color-white);
  border: 1px solid #E3E9F0;
  border-radius: 10px;
  margin-bottom: 0.75rem;
  overflow: hidden;
  transition: var(--transition-base);
}

.accordion-item:hover {
  border-color: var(--color-primary);
}

.accordion-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-title);
  background: transparent;
  border: none;
  width: 100%;
  text-align: left;
  transition: var(--transition-base);
  font-family: inherit;
}

.accordion-header:hover {
  color: var(--color-primary);
}

.accordion-header .q-icon {
  width: 24px;
  height: 24px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
}

.accordion-header .arrow {
  margin-left: auto;
  transition: transform 0.3s ease;
  font-size: 0.85rem;
  color: var(--color-muted);
}

.accordion-item.active .accordion-header {
  color: var(--color-primary);
}

.accordion-item.active .accordion-header .arrow {
  transform: rotate(180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.accordion-content-inner {
  padding: 0 1.25rem 1.1rem 3.25rem;
  font-size: 0.9rem;
  color: #526170;
  line-height: 1.7;
}

/* 转化表单 */
.cta-section {
  padding: var(--spacer-lg) 0;
  background-color: var(--color-primary-light);
}

.cta-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  max-width: 760px;
  margin: 0 auto;
  padding: 2.5rem;
}

.cta-card h2 {
  font-size: var(--font-size-h2);
  font-weight: 700;
  color: var(--color-title);
  text-align: center;
  margin: 0 0 0.5rem;
  line-height: 1.35;
}

.cta-card .cta-subtitle {
  color: var(--color-muted);
  text-align: center;
  margin-bottom: 2rem;
  font-size: 0.95rem;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-title);
  margin-bottom: 0.35rem;
  display: block;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  height: 48px;
  border: 1px solid #D3DCE5;
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  font-family: inherit;
  color: var(--color-title);
  background: var(--color-white);
  transition: var(--transition-base);
}

.form-group textarea {
  height: 100px;
  resize: vertical;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(58, 124, 165, 0.15);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group.mb-0 {
  margin-bottom: 0;
}

.form-note {
  font-size: 0.75rem;
  color: var(--color-muted);
  text-align: center;
  margin-top: 0.75rem;
}

.form-success {
  display: none;
  background: #E8F5EE;
  color: var(--color-success);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  text-align: center;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
}

.form-success.show {
  display: block;
}

/* 页脚 */
.site-footer {
  background-color: var(--color-dark-bg);
  color: var(--color-dark-text);
  padding: 3.5rem 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand .nav-logo {
  color: #fff;
  margin-bottom: 0.75rem;
}

.footer-description {
  font-size: 0.85rem;
  color: #8FA1B2;
  line-height: 1.7;
  margin: 0;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
  margin: 0 0 1rem;
}

.footer-col ul li {
  padding: 0.3rem 0;
}

.footer-col ul li a {
  color: #8FA1B2;
  font-size: 0.85rem;
  transition: var(--transition-base);
}

.footer-col ul li a:hover {
  color: var(--color-primary);
  padding-left: 5px;
}

.footer-bottom {
  padding: 1.25rem 0;
  text-align: center;
  font-size: 0.8rem;
  color: #7A8DA0;
}

.footer-bottom .copyright {
  margin-bottom: 0.35rem;
}

.footer-bottom .disclaimer {
  color: #5D6E80;
  font-size: 0.75rem;
}

/* 移动端响应式 */
@media screen and (max-width: 1024px) {
  :root {
    --font-size-h1: 2.25rem;
    --font-size-h2: 1.75rem;
  }

  .matrix-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media screen and (max-width: 768px) {
  :root {
    --nav-height: 60px;
    --spacer-lg: 3rem;
    --spacer-md: 2rem;
    --font-size-h1: 2rem;
    --font-size-h2: 1.5rem;
  }

  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(14px);
    flex-direction: column;
    padding: 1rem 1.5rem;
    gap: 0;
    transform: translateY(-150%);
    transition: transform 0.3s ease;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  }

  .nav-links.open {
    transform: translateY(0);
  }

  .nav-links li {
    width: 100%;
    border-bottom: 1px solid var(--color-border);
  }

  .nav-links li:last-child {
    border-bottom: none;
  }

  .nav-links li a {
    display: block;
    padding: 0.85rem 0.5rem;
    font-size: 1rem;
  }

  .nav-links li a::after {
    display: none;
  }

  .nav-right .btn {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

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

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

  .compare-grid,
  .demo-grid {
    grid-template-columns: 1fr;
  }

  .content-layout {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .hero {
    min-height: auto;
    padding-top: calc(var(--nav-height) + 2rem);
  }

  .hero-search {
    flex-direction: column;
    border-radius: var(--radius-sm);
    padding: 0.5rem;
  }

  .hero-search input {
    border-radius: var(--radius-sm);
  }

  .hero-search .btn-primary {
    margin: 5px 0 0;
    border-radius: var(--radius-sm);
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .compare-card {
    padding: 1.5rem 1.25rem;
  }

  .cta-card {
    padding: 1.75rem 1.25rem;
  }

  .content-item {
    flex-direction: row;
  }

  .content-item img {
    width: 130px;
    height: 85px;
  }
  
  .demo-content h2 {
    margin-top: 1rem;
  }
}

@media screen and (max-width: 640px) {
  :root {
    --font-size-h1: 1.75rem;
    --font-size-h2: 1.375rem;
    --spacer-lg: 2.5rem;
    --spacer-md: 1.5rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .badge {
    font-size: 0.75rem;
    padding: 0.2rem 0.6rem;
  }

  .content-item {
    flex-direction: column;
  }

  .content-item img {
    width: 100%;
    height: 160px;
  }

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

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 0.85rem;
  }

  .stat-card {
    padding: 1.25rem 0.75rem;
  }

  .stat-number {
    font-size: 1.75rem;
  }
}

@media screen and (min-width: 1024px) {
  .hero h1 {
    font-size: 3rem;
  }
  
  .hero {
    padding-top: calc(var(--nav-height) + 4rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}