/* =========================================================
   如凌科技 - 全站样式（基于 Notus 风格 + 蓝绿渐变）
   ========================================================= */

:root {
  --primary-blue: #3240A7;
  --primary-green: #00C9A7;
  --accent-pink: #FF5777;
  --text-dark: #1F2937;
  --text-light: #6B7280;
  --bg-light: #F8F9FA;
  --border-soft: #E5E7EB;
  --gradient-main: linear-gradient(135deg, #3240A7 0%, #00C9A7 100%);
  --gradient-soft: linear-gradient(135deg, rgba(50, 64, 167, 0.08) 0%, rgba(0, 201, 167, 0.08) 100%);
  --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 20px 40px rgba(50, 64, 167, 0.12);
  --radius-card: 20px;
  --radius-btn: 25px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text-dark);
  line-height: 1.6;
  background: #ffffff;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s ease;
}

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

ul, ol {
  list-style: none;
}

/* ============ 渐变文本工具 ============ */
.gradient-text {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.gradient-bg {
  background: var(--gradient-main);
}

.gradient-soft-bg {
  background: var(--gradient-soft);
}

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

/* ============ 导航栏 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-soft);
  transition: all 0.3s ease;
}

.site-header.scrolled {
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  color: var(--text-dark);
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 18px;
  box-shadow: 0 6px 16px rgba(50, 64, 167, 0.25);
}

.brand-name {
  letter-spacing: 1px;
}

.brand-name span {
  color: var(--primary-blue);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-menu a {
  color: var(--text-dark);
  font-weight: 500;
  font-size: 15px;
  position: relative;
  padding: 6px 0;
}

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

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

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--primary-blue);
}

.nav-cta {
  background: var(--gradient-main);
  color: #fff !important;
  padding: 10px 22px;
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 14px;
  box-shadow: 0 6px 16px rgba(50, 64, 167, 0.25);
  transition: all 0.3s ease;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(50, 64, 167, 0.35);
}

.nav-cta::after {
  display: none;
}

/* 移动端菜单按钮 */
.menu-toggle {
  display: none;
  background: transparent;
  border: none;
  width: 40px;
  height: 40px;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-dark);
  transition: all 0.3s ease;
  border-radius: 2px;
}

.menu-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.menu-toggle.open span:nth-child(2) {
  opacity: 0;
}
.menu-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============ Hero 区 ============ */
.hero {
  position: relative;
  padding: 100px 0 80px;
  background: linear-gradient(180deg, #F8F9FA 0%, #ffffff 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0, 201, 167, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  z-index: 0;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -200px;
  left: -200px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(50, 64, 167, 0.12) 0%, transparent 70%);
  border-radius: 50%;
  z-index: 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: inline-block;
  padding: 6px 14px;
  background: var(--gradient-soft);
  color: var(--primary-blue);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 48px;
  line-height: 1.2;
  font-weight: 800;
  margin-bottom: 24px;
  color: var(--text-dark);
  letter-spacing: -0.5px;
}

.hero-desc {
  font-size: 18px;
  color: var(--text-light);
  margin-bottom: 36px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-primary,
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  border: none;
  transition: all 0.3s ease;
  font-family: inherit;
}

.btn-primary {
  background: var(--gradient-main);
  color: #fff;
  box-shadow: 0 10px 24px rgba(50, 64, 167, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(50, 64, 167, 0.4);
}

.btn-outline {
  background: #fff;
  color: var(--primary-blue);
  border: 2px solid transparent;
  background-image: linear-gradient(#fff, #fff), var(--gradient-main);
  background-origin: border-box;
  background-clip: padding-box, border-box;
}

.btn-outline:hover {
  transform: translateY(-2px);
}

/* Hero 视觉 */
.hero-visual {
  position: relative;
  height: 420px;
}

.hero-card {
  position: absolute;
  background: #fff;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  font-weight: 600;
  font-size: 15px;
  transition: transform 0.4s ease;
}

.hero-card:hover {
  transform: translateY(-6px) scale(1.02);
}

.hero-card .ic {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-soft);
  font-size: 22px;
  flex-shrink: 0;
}

.hero-card-1 {
  top: 20px;
  left: 0;
  animation: floaty 6s ease-in-out infinite;
}
.hero-card-2 {
  top: 130px;
  right: 20px;
  animation: floaty 6s ease-in-out 1s infinite;
}
.hero-card-3 {
  bottom: 40px;
  left: 60px;
  animation: floaty 6s ease-in-out 2s infinite;
}
.hero-card-4 {
  bottom: 0;
  right: 0;
  animation: floaty 6s ease-in-out 3s infinite;
}

@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.hero-blob {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 280px;
  height: 280px;
  background: var(--gradient-main);
  border-radius: 50%;
  opacity: 0.1;
  z-index: -1;
}

/* ============ 数据统计条 ============ */
/* ============ 通用 Section ============ */
.section {
  padding: 90px 0;
}
.hero + .section {
  position: relative;
  border-top: 1px solid rgba(50, 64, 167, 0.08);
}

.hero + .section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 74px;
  background:
    linear-gradient(180deg, rgba(248, 249, 250, 0.96) 0%, rgba(255, 255, 255, 0.88) 100%),
    radial-gradient(circle at 18% 0%, rgba(50, 64, 167, 0.12) 0%, transparent 34%),
    radial-gradient(circle at 82% 0%, rgba(0, 201, 167, 0.12) 0%, transparent 32%);
  pointer-events: none;
}

.hero + .section > .container {
  position: relative;
  z-index: 1;
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 60px;
}

.section-eyebrow {
  display: inline-block;
  padding: 6px 14px;
  background: var(--gradient-soft);
  color: var(--primary-blue);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}

.section-title {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.3px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-light);
  line-height: 1.7;
}

.bg-light {
  background: var(--bg-light);
}

/* ============ 优势卡片 ============ */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.adv-card {
  background: #fff;
  border-radius: var(--radius-card);
  padding: 36px 28px;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
  border: 1px solid transparent;
}

.adv-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(50, 64, 167, 0.1);
}

.adv-ic {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: var(--gradient-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: 22px;
}

.adv-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-dark);
}

.adv-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.6;
}

/* ============ 产品区块 ============ */
.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.product-card {
  position: relative;
  background: #fff;
  border-radius: var(--radius-card);
  padding: 40px 36px;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
  overflow: hidden;
  border: 1px solid var(--border-soft);
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-main);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
}

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

.product-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.product-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 28px;
  box-shadow: 0 8px 20px rgba(50, 64, 167, 0.25);
  flex-shrink: 0;
}

.product-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 4px;
}

.product-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--primary-blue);
  background: var(--gradient-soft);
  padding: 2px 10px;
  border-radius: 10px;
  font-weight: 600;
}

.product-desc {
  color: var(--text-light);
  font-size: 15px;
  margin-bottom: 20px;
  line-height: 1.6;
}

.product-features {
  margin-bottom: 24px;
}

.product-features li {
  position: relative;
  padding-left: 28px;
  font-size: 14px;
  color: var(--text-dark);
  margin-bottom: 10px;
  line-height: 1.5;
}

.product-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--gradient-soft);
  color: var(--primary-blue);
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary-blue);
  font-weight: 600;
  font-size: 14px;
  transition: gap 0.3s ease;
}

.product-link:hover {
  gap: 10px;
}

/* ============ 发展历程时间线 ============ */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding: 20px 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--gradient-main);
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  width: 50%;
  padding: 20px 40px;
  box-sizing: border-box;
}

.timeline-item:nth-child(odd) {
  left: 0;
  text-align: right;
}

.timeline-item:nth-child(even) {
  left: 50%;
  text-align: left;
}

.timeline-dot {
  position: absolute;
  top: 30px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--gradient-main);
  border: 4px solid #fff;
  box-shadow: 0 0 0 4px rgba(50, 64, 167, 0.15);
  z-index: 2;
}

.timeline-item:nth-child(odd) .timeline-dot {
  right: -9px;
}

.timeline-item:nth-child(even) .timeline-dot {
  left: -9px;
}

.timeline-content {
  background: #fff;
  border-radius: var(--radius-card);
  padding: 22px 26px;
  box-shadow: var(--shadow-card);
  display: inline-block;
}

.timeline-year {
  display: inline-block;
  font-size: 22px;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 6px;
}

.timeline-content h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--text-dark);
}

.timeline-content p {
  font-size: 14px;
  color: var(--text-light);
}

/* ============ CTA 区块 ============ */
.cta {
  background: var(--gradient-main);
  border-radius: var(--radius-card);
  padding: 60px 50px;
  color: #fff;
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.cta::before,
.cta::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
}

.cta::before {
  width: 200px;
  height: 200px;
  top: -100px;
  right: -50px;
}

.cta::after {
  width: 150px;
  height: 150px;
  bottom: -60px;
  left: -40px;
}

.cta-content {
  position: relative;
  z-index: 1;
}

.cta h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 14px;
}

.cta p {
  font-size: 16px;
  opacity: 0.9;
  margin-bottom: 28px;
}

.cta .btn-primary {
  background: #fff;
  color: var(--primary-blue);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.15);
}

.cta .btn-primary:hover {
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.25);
}

/* ============ 关于我们页面 ============ */
.page-banner {
  padding: 80px 0 60px;
  background: var(--gradient-soft-bg);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(0, 201, 167, 0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.page-banner::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(50, 64, 167, 0.12) 0%, transparent 70%);
  border-radius: 50%;
}

.page-banner h1 {
  position: relative;
  font-size: 42px;
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}

.page-banner p {
  position: relative;
  font-size: 17px;
  color: var(--text-light);
  max-width: 620px;
  margin: 0 auto;
}

.about-intro {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-intro h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 20px;
  line-height: 1.3;
}

.about-intro p {
  color: var(--text-light);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 14px;
}

.about-visual {
  position: relative;
  height: 360px;
  background: var(--gradient-soft-bg);
  border-radius: var(--radius-card);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.about-visual::before {
  content: '科技 · 创新 · 未来';
  font-size: 32px;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 4px;
}

.about-visual::after {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  border: 2px dashed rgba(50, 64, 167, 0.3);
  border-radius: 50%;
  animation: spin 20s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.scope-card {
  background: #fff;
  border-radius: var(--radius-card);
  padding: 30px;
  box-shadow: var(--shadow-card);
  margin-bottom: 16px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  border-left: 4px solid transparent;
  transition: all 0.3s ease;
}

.scope-card:hover {
  border-left-color: var(--primary-green);
  transform: translateX(6px);
}

.scope-num {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--gradient-main);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
}

.scope-card h4 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 6px;
}

.scope-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.6;
}

.scope-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

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

.value-card {
  text-align: center;
  padding: 36px 24px;
  background: #fff;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
}

.value-card:hover {
  transform: translateY(-6px);
}

.value-ic {
  font-size: 40px;
  margin-bottom: 16px;
}

.value-card h4 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.value-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.6;
}

/* ============ 联系页面 ============ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 50px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-item {
  display: flex;
  gap: 16px;
  padding: 20px;
  background: #fff;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  align-items: flex-start;
}

.contact-item-ic {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--gradient-main);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.contact-item h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
}

.contact-item p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.6;
}

.contact-form {
  background: #fff;
  border-radius: var(--radius-card);
  padding: 40px;
  box-shadow: var(--shadow-card);
}

.contact-form h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
}

.contact-form p.sub {
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 26px;
}

.form-field {
  margin-bottom: 18px;
}

.form-field label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-dark);
}

.form-field input,
.form-field textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border-soft);
  border-radius: 12px;
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
  background: #fff;
  color: var(--text-dark);
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(50, 64, 167, 0.1);
}

.form-field textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-form button[type="submit"] {
  width: 100%;
  margin-top: 8px;
  justify-content: center;
}

.form-tip {
  margin-top: 12px;
  font-size: 13px;
  color: var(--text-light);
  text-align: center;
}

.form-tip.success {
  color: var(--primary-green);
  font-weight: 600;
}

.form-tip.error {
  color: var(--accent-pink);
  font-weight: 600;
}

/* ============ Footer ============ */
.site-footer {
  background: #1A2238;
  color: rgba(255, 255, 255, 0.7);
  padding: 50px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-col h5 {
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 18px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-brand .brand-mark {
  width: 36px;
  height: 36px;
}

.footer-brand span {
  color: #fff;
  font-size: 20px;
  font-weight: 700;
}

.footer-col p {
  font-size: 13px;
  line-height: 1.7;
  margin-bottom: 12px;
}

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

.footer-col ul li a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 13px;
  transition: color 0.3s ease;
}

.footer-col ul li a:hover {
  color: var(--primary-green);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  text-align: center;
  font-size: 12px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
}

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

.footer-bottom img {
  display: inline-block;
  vertical-align: middle;
  height: 14px;
  margin: 0 4px;
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .hero-grid,
  .about-intro,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-visual {
    height: 360px;
  }

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

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

@media (max-width: 768px) {
  html {
    font-size: 14px;
  }

  .menu-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 72px;
    right: 0;
    width: 80%;
    max-width: 320px;
    height: calc(100vh - 72px);
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    padding: 30px 24px;
    gap: 20px;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.08);
    transform: translateX(100%);
    transition: transform 0.3s ease;
  }

  .nav-menu.open {
    transform: translateX(0);
  }

  .nav-menu a {
    font-size: 16px;
  }

  .nav-cta {
    margin-top: 10px;
  }

  .hero {
    padding: 60px 0 50px;
  }

  .hero-title {
    font-size: 32px;
  }

  .hero-desc {
    font-size: 15px;
  }

  .hero-visual {
    height: 320px;
  }

  .hero-card {
    padding: 14px 16px;
    font-size: 13px;
  }

  .hero-card .ic {
    width: 36px;
    height: 36px;
    font-size: 18px;
  }

  .section {
    padding: 60px 0;
  }
  .hero + .section::before {
    height: 48px;
  }

  .section-title {
    font-size: 26px;
  }

  .adv-grid,
  .product-grid,
  .value-grid,
  .scope-grid {
    grid-template-columns: 1fr;
  }

  .product-card,
  .cta {
    padding: 30px 24px;
  }

  .cta h2 {
    font-size: 24px;
  }

  .page-banner {
    padding: 50px 0 40px;
  }

  .page-banner h1 {
    font-size: 30px;
  }

  .about-visual {
    height: 240px;
  }

  .about-visual::before {
    font-size: 22px;
    letter-spacing: 2px;
  }

  .timeline::before {
    left: 18px;
  }

  .timeline-item {
    width: 100%;
    padding: 14px 14px 14px 50px;
    text-align: left !important;
  }

  .timeline-item:nth-child(odd),
  .timeline-item:nth-child(even) {
    left: 0;
  }

  .timeline-item:nth-child(odd) .timeline-dot,
  .timeline-item:nth-child(even) .timeline-dot {
    left: 9px;
    right: auto;
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

/* 滚动出现动画 */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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