/* ===== 全局样式 ===== */
:root {
  --primary: #1a3a6e;
  --primary-light: #1e4d96;
  --accent: #00b4d8;
  --accent-dark: #0090b0;
  --text-dark: #1f2937;
  --text-mid: #4b5563;
  --text-light: #9ca3af;
  --bg-light: #f8fafc;
  --bg-section: #f1f5f9;
  --white: #ffffff;
  --border: #e5e7eb;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text-dark);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.25s;
}

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

/* ===== 导航栏 ===== */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--white);
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
  transition: background 0.3s, box-shadow 0.3s;
}

#navbar.scrolled {
  box-shadow: 0 2px 20px rgba(0,0,0,0.15);
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  flex-shrink: 0;
}

.nav-logo-img {
  height: 42px;
  max-width: 180px;
  width: auto;
  object-fit: contain;
  display: block;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.5rem 0.8rem;
  font-size: 0.9rem;
  color: var(--text-dark);
  border-radius: 6px;
  transition: all 0.2s;
  white-space: nowrap;
  cursor: pointer;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent);
  background: rgba(0, 180, 216, 0.06);
}

.nav-link .arrow {
  font-size: 0.65rem;
  transition: transform 0.2s;
  display: inline-block;
}

.nav-item:hover .arrow {
  transform: rotate(180deg);
}

/* 下拉菜单 */
.dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  min-width: 200px;
  background: var(--white);
  border-radius: 10px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.12);
  border: 1px solid var(--border);
  overflow: hidden;
  animation: dropFade 0.2s ease;
  z-index: 999;
}

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

@keyframes dropFade {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.dropdown a {
  display: block;
  padding: 0.65rem 1.2rem;
  font-size: 0.875rem;
  color: var(--text-mid);
  transition: all 0.2s;
}

.dropdown a:hover {
  background: var(--bg-light);
  color: var(--accent);
  padding-left: 1.6rem;
}

/* 联系我们按钮 */
.nav-contact-btn {
  padding: 0.45rem 1.2rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: var(--white) !important;
  border-radius: 25px;
  font-size: 0.875rem;
  font-weight: 600;
  transition: all 0.25s !important;
  box-shadow: 0 2px 10px rgba(0,180,216,0.3);
}

.nav-contact-btn:hover {
  background: linear-gradient(135deg, var(--accent-dark), var(--primary)) !important;
  box-shadow: 0 4px 15px rgba(0,180,216,0.4) !important;
  transform: translateY(-1px);
}

/* 汉堡菜单 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: all 0.3s;
}

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

/* 移动端菜单 */
#mobile-menu {
  display: none;
  background: var(--white);
  border-top: 1px solid var(--border);
  padding: 1rem 1.5rem 1.5rem;
  max-height: 80vh;
  overflow-y: auto;
}

#mobile-menu.open {
  display: block;
}

.mobile-nav-item {
  border-bottom: 1px solid var(--border);
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0;
  font-size: 0.95rem;
  color: var(--text-dark);
  font-weight: 500;
  cursor: pointer;
}

.mobile-nav-link:hover {
  color: var(--accent);
}

.mobile-dropdown {
  display: none;
  padding: 0.25rem 0 0.75rem 1rem;
}

.mobile-dropdown.open {
  display: block;
}

.mobile-dropdown a {
  display: block;
  padding: 0.5rem 0;
  font-size: 0.875rem;
  color: var(--text-mid);
}

.mobile-dropdown a:hover {
  color: var(--accent);
}

/* ===== 内容区域基础 ===== */
.page-content {
  padding-top: 70px;
}

/* ===== Hero Section ===== */
.hero {
  min-height: 67.5vh;
  background: linear-gradient(135deg, var(--primary) 0%, #0d2a57 40%, #0a1f3d 70%, #051328 100%);
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  padding: 4rem 1.5rem;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(ellipse at 20% 50%, rgba(0,180,216,0.12) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(0,180,216,0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 60% 80%, rgba(30,77,150,0.3) 0%, transparent 50%);
  pointer-events: none;
}

/* 粒子效果 */
.hero-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.hero-particles span {
  position: absolute;
  width: 3px;
  height: 3px;
  background: rgba(0,180,216,0.5);
  border-radius: 50%;
  animation: float-particle linear infinite;
}

@keyframes float-particle {
  0% { transform: translateY(100vh) translateX(0); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(-20px) translateX(30px); opacity: 0; }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
}

.hero-subtitle-en {
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
  font-weight: 500;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.3;
  margin-bottom: 1rem;
}

.hero-title-en {
  font-size: clamp(0.9rem, 2vw, 1.15rem);
  color: rgba(255,255,255,0.7);
  margin-bottom: 2.5rem;
  line-height: 1.6;
}

.hero-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 2.5rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: var(--white);
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  box-shadow: 0 4px 20px rgba(0,180,216,0.4);
  transition: all 0.3s;
}

.hero-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0,180,216,0.5);
}

/* ===== 通用页面 Banner ===== */
.page-banner {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  padding: 4rem 1.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(0,180,216,0.15) 0%, transparent 60%);
  pointer-events: none;
}

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

.page-banner-label {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
  font-weight: 600;
}

.page-banner h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  color: var(--white);
  margin-bottom: 0.5rem;
}

.page-banner p {
  color: rgba(255,255,255,0.7);
  font-size: 0.95rem;
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
  justify-content: center;
  margin-top: 1rem;
}

.breadcrumb a {
  color: rgba(255,255,255,0.7);
}

.breadcrumb a:hover {
  color: var(--accent);
}

.breadcrumb .sep {
  color: rgba(255,255,255,0.4);
}

/* ===== 通用 Section ===== */
.section {
  padding: 5rem 1.5rem;
}

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

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

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
  font-weight: 600;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 1rem;
  line-height: 1.3;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-mid);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

/* 分割线装饰 */
.section-divider {
  width: 50px;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--primary));
  border-radius: 2px;
  margin: 1rem auto 0;
}

/* ===== 卡片 ===== */
.card {
  background: var(--white);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 2rem;
  transition: all 0.3s;
  border: 1px solid var(--border);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0,180,216,0.2);
}

.card-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, rgba(0,180,216,0.12), rgba(26,58,110,0.08));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  font-size: 1.5rem;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.6rem;
}

.card-title-en {
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 0.75rem;
  font-weight: 500;
}

.card-desc {
  font-size: 0.9rem;
  color: var(--text-mid);
  line-height: 1.8;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 1.25rem;
  font-size: 0.875rem;
  color: var(--accent);
  font-weight: 600;
  transition: gap 0.2s;
}

.card-link:hover {
  gap: 0.6rem;
}

/* ===== 网格布局 ===== */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

/* ===== 核心优势 ===== */
.advantage-item {
  text-align: center;
  padding: 2rem 1.5rem;
  border-radius: 16px;
  background: var(--white);
  box-shadow: var(--shadow);
  transition: all 0.3s;
  border: 1px solid var(--border);
}

.advantage-item:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 8px 30px rgba(0,180,216,0.12);
}

.advantage-icon {
  width: 70px;
  height: 70px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.2rem;
  font-size: 1.8rem;
  color: white;
}

.advantage-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.3rem;
}

.advantage-title-en {
  font-size: 0.78rem;
  color: var(--accent);
}

/* ===== 应用场景 ===== */
.application-tabs {
  display: flex;
  gap: 0;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  margin-bottom: 2rem;
}

.app-tab {
  flex: 1;
  padding: 1rem 1.5rem;
  text-align: center;
  cursor: pointer;
  background: var(--bg-light);
  transition: all 0.3s;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-mid);
}

.app-tab.active {
  background: var(--primary);
  color: var(--white);
}

.app-panel {
  display: none;
}

.app-panel.active {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

/* ===== 联系表单 ===== */
.contact-section {
  background: linear-gradient(135deg, var(--primary), #0d2a57);
  padding: 5rem 1.5rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 4rem;
  align-items: start;
}

.contact-info h2 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 0.5rem;
}

.contact-info p.en {
  color: var(--accent);
  font-size: 0.85rem;
  margin-bottom: 2rem;
}

.contact-detail {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  color: rgba(255,255,255,0.85);
  font-size: 0.9rem;
  line-height: 1.6;
}

.contact-detail-icon {
  width: 36px;
  height: 36px;
  background: rgba(0,180,216,0.2);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1rem;
  color: var(--accent);
}

/* 表单 */
.contact-form {
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  padding: 2.5rem;
  border: 1px solid rgba(255,255,255,0.1);
}

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

.form-input {
  width: 100%;
  padding: 0.85rem 1.2rem;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 10px;
  color: var(--white);
  font-size: 0.9rem;
  font-family: inherit;
  outline: none;
  transition: all 0.25s;
}

.form-input::placeholder {
  color: rgba(255,255,255,0.45);
}

.form-input:focus {
  border-color: var(--accent);
  background: rgba(255,255,255,0.12);
  box-shadow: 0 0 0 3px rgba(0,180,216,0.15);
}

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

.form-submit {
  width: 100%;
  padding: 1rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: var(--white);
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s;
  font-family: inherit;
  box-shadow: 0 4px 15px rgba(0,180,216,0.3);
}

.form-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,180,216,0.4);
}

/* ===== 页脚 ===== */
footer {
  background: #0d1f3c;
  color: rgba(255,255,255,0.8);
  padding: 4rem 1.5rem 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.5fr;
  gap: 3rem;
  max-width: 1200px;
  margin: 0 auto;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand-name {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 0.5rem;
}

.footer-brand-slogan {
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 1.25rem;
  line-height: 1.8;
}

.footer-col-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 1.25rem;
  position: relative;
  padding-bottom: 0.75rem;
}

.footer-col-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.6rem;
}

.footer-links a {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.65);
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  margin-bottom: 0.85rem;
  font-size: 0.875rem;
  color: rgba(255,255,255,0.65);
  line-height: 1.6;
}

.footer-contact-icon {
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 2px;
}

.footer-bottom {
  text-align: center;
  padding: 1.5rem 0;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
  max-width: 1200px;
  margin: 0 auto;
}

.footer-bottom a {
  color: rgba(255,255,255,0.5);
  transition: color 0.2s;
}

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

/* ===== Cookie 提示 ===== */
#cookie-banner {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 3rem);
  max-width: 700px;
  background: rgba(13,31,60,0.95);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(0,180,216,0.2);
  border-radius: 14px;
  padding: 1.25rem 1.5rem;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  box-shadow: 0 8px 30px rgba(0,0,0,0.3);
  transition: all 0.3s;
}

#cookie-banner.hidden {
  opacity: 0;
  transform: translateX(-50%) translateY(30px);
  pointer-events: none;
}

.cookie-text {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.8);
}

.cookie-text a {
  color: var(--accent);
  text-decoration: underline;
}

.cookie-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.cookie-btn-accept {
  padding: 0.5rem 1.25rem;
  background: var(--accent);
  color: var(--white);
  border: none;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.2s;
}

.cookie-btn-accept:hover {
  background: var(--accent-dark);
}

/* ===== FAQ 折叠 ===== */
.faq-group {
  margin-bottom: 2.5rem;
}

.faq-group-title {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 0.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent);
}

.faq-group-title-en {
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 0.75rem;
  overflow: hidden;
  transition: box-shadow 0.25s;
}

.faq-item.open {
  box-shadow: 0 4px 15px rgba(0,180,216,0.1);
  border-color: rgba(0,180,216,0.25);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 1.4rem;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-dark);
  background: var(--white);
  transition: all 0.2s;
  user-select: none;
}

.faq-question:hover {
  color: var(--accent);
  background: var(--bg-light);
}

.faq-item.open .faq-question {
  color: var(--accent);
  border-bottom: 1px solid var(--border);
}

.faq-toggle {
  width: 24px;
  height: 24px;
  background: rgba(0,180,216,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  flex-shrink: 0;
  transition: all 0.3s;
  color: var(--accent);
}

.faq-item.open .faq-toggle {
  background: var(--accent);
  color: var(--white);
  transform: rotate(180deg);
}

.faq-answer {
  display: none;
  padding: 1.2rem 1.4rem;
  font-size: 0.9rem;
  color: var(--text-mid);
  line-height: 1.8;
  background: var(--bg-light);
}

.faq-item.open .faq-answer {
  display: block;
}

/* ===== 数据展示 ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.stat-item {
  background: var(--white);
  padding: 2rem;
  text-align: center;
}

.stat-value {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-value span {
  color: var(--accent);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-mid);
}

/* ===== 通用内容区 ===== */
.content-prose {
  max-width: 900px;
  margin: 0 auto;
}

.content-prose h3 {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--primary);
  margin: 2rem 0 0.75rem;
}

.content-prose p {
  color: var(--text-mid);
  margin-bottom: 1rem;
  line-height: 1.9;
}

.content-prose ul {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

.content-prose ul li {
  color: var(--text-mid);
  margin-bottom: 0.5rem;
  line-height: 1.8;
}

/* 高亮块 */
.highlight-box {
  background: linear-gradient(135deg, rgba(0,180,216,0.06), rgba(26,58,110,0.04));
  border-left: 4px solid var(--accent);
  border-radius: 0 10px 10px 0;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
}

.highlight-box p {
  color: var(--text-dark);
  margin: 0;
  font-size: 0.95rem;
  font-weight: 500;
}

/* 性能指标列表 */
.spec-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.spec-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.4rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  transition: all 0.25s;
}

.spec-item:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 15px rgba(0,180,216,0.1);
}

.spec-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--accent), var(--primary));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.spec-content h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.3rem;
}

.spec-content p {
  font-size: 0.85rem;
  color: var(--text-mid);
  line-height: 1.6;
}

/* 产品卡片（带边框渐变） */
.product-card {
  background: var(--white);
  border-radius: 16px;
  border: 1px solid var(--border);
  overflow: hidden;
  transition: all 0.3s;
  box-shadow: var(--shadow);
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0,180,216,0.25);
}

.product-card-header {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  padding: 1.75rem;
  color: white;
}

.product-card-header h3 {
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 0.3rem;
}

.product-card-header p {
  font-size: 0.8rem;
  opacity: 0.8;
}

.product-card-body {
  padding: 1.5rem;
}

/* 步骤指示 */
.steps {
  display: flex;
  gap: 0;
  counter-reset: step;
}

.step-item {
  flex: 1;
  text-align: center;
  position: relative;
  padding: 0 1rem;
}

.step-item::before {
  counter-increment: step;
  content: counter(step);
  display: block;
  width: 46px;
  height: 46px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%;
  color: white;
  font-size: 1.1rem;
  font-weight: 800;
  line-height: 46px;
  margin: 0 auto 1rem;
}

.step-item::after {
  content: '→';
  position: absolute;
  top: 10px;
  right: -10px;
  color: var(--accent);
  font-size: 1.3rem;
}

.step-item:last-child::after {
  display: none;
}

.step-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.25rem;
}

.step-desc {
  font-size: 0.8rem;
  color: var(--text-mid);
}

/* ===== 招聘卡片 ===== */
.job-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  transition: all 0.3s;
  box-shadow: var(--shadow);
}

.job-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.job-info h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.job-meta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.job-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.8rem;
  color: var(--text-mid);
}

.job-salary {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--accent);
  white-space: nowrap;
}

/* ===== "关于我们"版块 ===== */
.about-card {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 20px;
  padding: 2.5rem;
  color: white;
  position: relative;
  overflow: hidden;
}

.about-card::before {
  content: '';
  position: absolute;
  right: -3rem;
  bottom: -3rem;
  width: 150px;
  height: 150px;
  background: rgba(0,180,216,0.15);
  border-radius: 50%;
}

.about-card-number {
  font-size: 3.5rem;
  font-weight: 900;
  color: rgba(255,255,255,0.1);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.about-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.about-card p {
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(255,255,255,0.8);
}

/* ===== 产品 Tag ===== */
.tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
}

.tag-blue {
  background: rgba(26,58,110,0.08);
  color: var(--primary);
}

.tag-cyan {
  background: rgba(0,180,216,0.1);
  color: var(--accent-dark);
}

/* ===== 新闻中心空状态 ===== */
.empty-state {
  text-align: center;
  padding: 5rem 1.5rem;
}

.empty-state-icon {
  font-size: 4rem;
  opacity: 0.3;
  margin-bottom: 1.5rem;
}

.empty-state h3 {
  font-size: 1.2rem;
  color: var(--text-mid);
  font-weight: 500;
}

/* ===== 按钮 ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 2rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: var(--white);
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.25s;
  box-shadow: 0 3px 12px rgba(0,180,216,0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,180,216,0.4);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 2rem;
  border: 2px solid var(--accent);
  color: var(--accent);
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.25s;
}

.btn-outline:hover {
  background: var(--accent);
  color: var(--white);
}

/* ===== Streck 产品 ===== */
.product-list-item {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.5rem;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 1rem;
  transition: all 0.25s;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.product-list-item:hover {
  border-color: var(--accent);
  transform: translateX(4px);
  box-shadow: 0 4px 15px rgba(0,180,216,0.1);
}

.product-list-num {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
  font-size: 1rem;
  flex-shrink: 0;
}

.product-list-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary);
}

/* 价值观卡片 */
.value-card {
  background: var(--white);
  border-radius: 16px;
  padding: 2.5rem 2rem;
  text-align: center;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}

.value-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transition: transform 0.3s;
}

.value-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.value-card:hover::after {
  transform: scaleX(1);
}

.value-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.value-title {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 0.75rem;
}

.value-desc {
  font-size: 0.9rem;
  color: var(--text-mid);
  line-height: 1.8;
}

/* ===== 响应式断点 ===== */
@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

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

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

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .grid-4 {
    grid-template-columns: 1fr;
  }

  .app-panel.active {
    grid-template-columns: 1fr;
  }

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

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

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

  .section {
    padding: 3.5rem 1.25rem;
  }

  .hero {
    min-height: 85vh;
    padding: 5rem 1.25rem 3rem;
  }

  .contact-form {
    padding: 1.75rem;
  }

  .job-card {
    flex-direction: column;
    align-items: flex-start;
  }

  .application-tabs {
    flex-direction: column;
  }

  .steps {
    flex-direction: column;
    gap: 1.5rem;
  }

  .step-item::after {
    content: '↓';
    position: static;
    display: block;
    margin-top: 0.75rem;
  }

  #cookie-banner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .nav-logo-img {
    height: 34px;
    max-width: 130px;
  }

  .hero-title {
    font-size: 1.8rem;
  }

  .section-title {
    font-size: 1.5rem;
  }

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

  .stat-value {
    font-size: 1.8rem;
  }
}