/* === Reset & Base === */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* 科技蓝主题色 */
  --blue-900: #1a3d7a;
  --blue-800: #1e4a9e;
  --blue-700: #2158c2;
  --blue-600: #2768EA;
  --blue-500: #3d7aee;
  --blue-400: #5c91f2;
  --blue-300: #7ba8f5;
  --blue-200: #a3c4f8;
  --blue-100: #c5d8fa;
  --blue-50: #e8effd;

  /* 保留绿色变量但使用蓝色值（兼容旧引用） */
  --green-900: #1a3d7a;
  --green-800: #1e4a9e;
  --green-700: #2158c2;
  --green-600: #2768EA;
  --green-500: #3d7aee;
  --green-400: #5c91f2;
  --green-300: #7ba8f5;
  --green-200: #a3c4f8;
  --green-100: #c5d8fa;
  --green-50: #e8effd;

  --earth-800: #2c3a5a;
  --earth-600: #3d5075;
  --earth-400: #6a7fa0;

  --gray-900: #2a241f;
  --gray-800: #3d3630;
  --gray-700: #544c45;
  --gray-600: #736a62;
  --gray-500: #988e85;
  --gray-400: #b8aea4;
  --gray-300: #d5ccc3;
  --gray-200: #e8e0d7;
  --gray-100: #f3ede6;
  --gray-50: #faf6f0;

  --white: #ffffff;
  --shadow-sm: 0 2px 8px rgba(26,61,122,0.08);
  --shadow-md: 0 4px 20px rgba(26,61,122,0.10);
  --shadow-lg: 0 8px 40px rgba(26,61,122,0.14);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
}

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

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--gray-800);
  line-height: 1.7;
  background: var(--white);
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

ul { list-style: none; }

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

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

/* === Typography === */
.text-accent {
  color: var(--green-600);
}

/* === Header / Navigation === */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(26,61,122,0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.10);
  transition: var(--transition);
}

.header.scrolled {
  background: rgba(26,61,122,0.88);
  box-shadow: 0 2px 16px rgba(0,0,0,0.15);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--white);
}

.logo-icon { flex-shrink: 0; }

.logo-accent { color: #7ba8f5; }

.nav-list {
  display: flex;
  gap: 8px;
}

.nav-link {
  display: inline-block;
  padding: 8px 18px;
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  border-radius: 6px;
  transition: var(--transition);
  position: relative;
}

.nav-link:hover {
  color: var(--white);
  background: rgba(255,255,255,0.15);
}

.nav-link.active {
  color: #FFD700;
  font-weight: 700;
  font-size: 1rem;
  background: rgba(255,255,255,0.10);
}

/* Menu Toggle (Hamburger) */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  gap: 5px;
  padding: 4px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2.5px;
  background: rgba(255,255,255,0.85);
  border-radius: 2px;
  transition: var(--transition);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* === Hero Section === */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 24px 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(39,104,234,0.12) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 50%, rgba(30,74,158,0.08) 0%, transparent 60%),
    linear-gradient(135deg, var(--green-50) 0%, var(--white) 50%, var(--green-50) 100%);
  z-index: 0;
}

.hero-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(0deg, transparent, transparent 40px, rgba(39,104,234,0.03) 40px, rgba(39,104,234,0.03) 41px),
    repeating-linear-gradient(90deg, transparent, transparent 40px, rgba(39,104,234,0.03) 40px, rgba(39,104,234,0.03) 41px);
}

.hero-wrapper {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  width: 100%;
}

.hero-content {
  flex: 1;
  max-width: 560px;
}

.hero-content .hero-title {
  text-align: left;
}

.hero-content .hero-desc {
  margin: 0 0 2rem;
  text-align: left;
}

.hero-content .hero-actions {
  justify-content: flex-start;
}

.hero-image {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 520px;
  position: relative;
}

.hero-image img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  animation: floatUpDown 3s ease-in-out infinite;
}

.hero-image img:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 48px rgba(46,125,50,0.2);
}

/* 图片上下浮动动画 */
@keyframes floatUpDown {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.hero-title {
  font-size: clamp(1.9rem, 4.5vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--gray-900);
  margin-bottom: 1.2rem;
}

.hero-desc {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--gray-600);
  max-width: 620px;
  margin: 0 auto 2rem;
  line-height: 1.7;
}

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

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 36px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 50px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  letter-spacing: 0.3px;
}

.btn-primary {
  background: var(--green-600);
  color: var(--white);
  border-color: var(--green-600);
}

.btn-primary:hover {
  background: var(--green-700);
  border-color: var(--green-700);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(39,104,234,0.35);
}

.btn-outline {
  background: transparent;
  color: var(--green-700);
  border-color: var(--green-300);
}

.btn-outline:hover {
  background: var(--green-50);
  border-color: var(--green-600);
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
}

/* === Hero Stats === */
.hero-content .hero-stats {
  display: flex;
  justify-content: flex-start;
  gap: 36px;
  margin-top: 48px;
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
}

.stat-num {
  display: block;
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--green-700);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--gray-500);
  margin-top: 2px;
}

/* === Section === */
.section {
  padding: 96px 0;
}

.section-alt {
  background: var(--gray-100);
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  padding: 6px 18px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--green-700);
  background: var(--green-50);
  border-radius: 50px;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 12px;
  line-height: 1.25;
}

.section-desc {
  font-size: 1rem;
  color: var(--gray-500);
  line-height: 1.7;
}

.section-cta {
  text-align: center;
  margin-top: 48px;
}

/* === Products Grid === */
.product-grid {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.product-card {
  display: flex;
  align-items: stretch;
  gap: 36px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  border-radius: var(--radius-md);
  padding: 0;
  transition: var(--transition);
  overflow: hidden;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--green-200);
}

.product-icon {
  width: 220px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--green-50), var(--green-100));
}

.product-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 16px;
}

.product-card-body {
  flex: 1;
  padding: 32px 32px 32px 0;
}

.product-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 10px;
}

.product-desc {
  font-size: 0.95rem;
  color: var(--gray-500);
  line-height: 1.7;
  margin-bottom: 14px;
}

.product-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--green-600);
  transition: var(--transition);
  display: inline-block;
}

.product-link:hover {
  color: var(--green-800);
  transform: translateX(4px);
}

/* === Cases Grid === */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}

.case-card {
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

.case-img {
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.case-img-content {
  opacity: 0.85;
}

.case-body {
  padding: 24px 28px 28px;
}

.case-tag {
  display: inline-block;
  padding: 4px 14px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--green-700);
  background: var(--green-50);
  border-radius: 50px;
  margin-bottom: 12px;
}

.case-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.case-desc {
  font-size: 0.88rem;
  color: var(--gray-500);
  line-height: 1.65;
  margin-bottom: 14px;
}

.case-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--green-600);
  transition: var(--transition);
}

.case-link:hover {
  color: var(--green-800);
}

/* === About Section === */
.about-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-text {
  font-size: 1rem;
  color: var(--gray-600);
  line-height: 1.75;
  margin-bottom: 1rem;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 24px;
  margin-top: 1.5rem;
}

.about-feature {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--gray-700);
}

.about-image-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
}

.about-image-placeholder svg {
  width: 100%;
  height: auto;
  max-width: 400px;
}

/* === Contact Section === */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
}

.contact-form {
  background: var(--white);
  padding: 36px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
}

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

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

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.95rem;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm);
  background: var(--white);
  transition: var(--transition);
  color: var(--gray-800);
  font-family: inherit;
}

.form-input:focus {
  outline: none;
  border-color: var(--green-400);
  box-shadow: 0 0 0 3px rgba(76,175,80,0.1);
}

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

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 28px;
  padding: 36px;
}

.contact-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.contact-item svg {
  flex-shrink: 0;
  margin-top: 2px;
}

.contact-item strong {
  display: block;
  font-size: 0.9rem;
  color: var(--gray-800);
  margin-bottom: 4px;
}

.contact-item p {
  font-size: 0.88rem;
  color: var(--gray-500);
}

/* === Footer === */
.footer {
  background: #001B42;
  color: #8da4c4;
  padding: 64px 0 0;
}

.footer .logo span {
  color: var(--white);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand p {
  font-size: 0.88rem;
  color: #6a87b0;
  margin-top: 8px;
  line-height: 1.6;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 16px;
}

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

.footer-col ul li a {
  font-size: 0.85rem;
  color: #6a87b0;
  transition: var(--transition);
}

.footer-col ul li a:hover {
  color: #7ba8f5;
}

.social-links {
  display: flex;
  gap: 12px;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  color: #6a87b0;
  transition: var(--transition);
}

.social-link:hover {
  background: #2768EA;
  color: var(--white);
}

.footer-bottom {
  text-align: center;
  padding: 20px 0;
  font-size: 0.82rem;
  color: #4a6a94;
}

.footer-bottom a {
  color: #6a87b0;
  transition: var(--transition);
}

.footer-bottom a:hover {
  color: #7ba8f5;
}

/* === Inner Page Hero (for subpages) === */
.inner-hero {
  padding: 120px 24px 60px;
  background: linear-gradient(135deg, #1a3d7a 0%, #2768EA 50%, #3d7aee 100%);
  text-align: center;
  position: relative;
}

.inner-hero h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  color: var(--white);
  margin-bottom: 10px;
}

.inner-hero p {
  font-size: 1rem;
  color: rgba(255,255,255,0.8);
}

/* === Subpage Content Styles === */
.subpage-content {
  padding: 60px 0 96px;
}

/* Product detail cards on products.html */
.product-detail-list {
  display: grid;
  gap: 40px;
}

.product-detail-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 40px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 32px;
  align-items: start;
  transition: var(--transition);
}

.product-detail-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--green-200);
}

.product-detail-card .product-icon {
  margin: 0;
}

.product-detail-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 10px;
}

.product-detail-card p {
  color: var(--gray-500);
  line-height: 1.7;
  margin-bottom: 16px;
}

.product-specs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
}

.product-specs li {
  font-size: 0.85rem;
  color: var(--gray-600);
  padding: 8px 14px;
  background: var(--gray-50);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--green-400);
}

/* Case detail cards on cases.html */
.case-detail-list {
  display: grid;
  gap: 36px;
}

.case-detail-card {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.case-detail-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.case-detail-img {
  height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.case-detail-body {
  padding: 28px 32px;
  background: var(--white);
}

.case-detail-body h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.case-detail-body .case-desc {
  color: var(--gray-500);
  line-height: 1.7;
  margin-bottom: 12px;
}

.case-result {
  display: inline-flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--gray-100);
}

.case-result-item {
  font-size: 0.85rem;
  color: var(--gray-600);
}

.case-result-item strong {
  display: block;
  font-size: 1rem;
  color: var(--green-700);
}

/* About page */
.about-content-full {
  max-width: 800px;
  margin: 0 auto;
}

.about-content-full p {
  font-size: 1rem;
  color: var(--gray-600);
  line-height: 1.8;
  margin-bottom: 1.2rem;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 28px;
  margin-top: 48px;
}

.team-card {
  text-align: center;
  padding: 28px 20px;
  background: var(--white);
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-200);
  transition: var(--transition);
}

.team-card:hover {
  border-color: var(--green-200);
  box-shadow: var(--shadow-sm);
}

.team-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--green-100);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 2rem;
  font-weight: 700;
  color: var(--green-700);
}

.team-name {
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 4px;
}

.team-role {
  font-size: 0.85rem;
  color: var(--gray-500);
}

/* Contact page */
.contact-page-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-map-placeholder {
  height: 400px;
  background: var(--green-50);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--green-600);
  gap: 12px;
  font-size: 0.95rem;
}

/* === Animations === */
[data-aos] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].aos-animate {
  opacity: 1;
  transform: translateY(0);
}

[data-aos="zoom-in"] {
  transform: scale(0.92);
}

[data-aos="zoom-in"].aos-animate {
  transform: scale(1);
}

[data-aos="fade-right"] {
  transform: translateX(-30px);
}

[data-aos="fade-right"].aos-animate {
  transform: translateX(0);
}

[data-aos="fade-left"] {
  transform: translateX(30px);
}

[data-aos="fade-left"].aos-animate {
  transform: translateX(0);
}

[data-aos-delay="100"] { transition-delay: 0.1s; }
[data-aos-delay="200"] { transition-delay: 0.2s; }
[data-aos-delay="300"] { transition-delay: 0.3s; }