/* ============================================
   宇普西龙科技 - 全局样式
   蓝色科技主题
   ============================================ */

:root {
  --primary: #0071e3;
  --primary-dark: #0058b0;
  --primary-light: #2997ff;
  --accent: #00d4ff;
  --dark: #1d1d1f;
  --dark-2: #0f1f3a;
  --dark-3: #162a4a;
  --text: #1d1d1f;
  --text-light: #6e6e73;
  --text-muted: #86868b;
  --bg: #fbfbfd;
  --bg-white: #ffffff;
  --border: #d2d2d7;
  /* Apple 风格分层阴影 — 极柔和 */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 8px 32px rgba(0, 113, 227, 0.12);
  --radius: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --transition: all 0.35s cubic-bezier(0.25, 0.1, 0.25, 1);
  --ease-out: cubic-bezier(0.25, 0.1, 0.25, 1);
}

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

html {
  scroll-behavior: smooth;
  /* 禁止页面缩放 */
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  touch-action: manipulation;
}

body {
  font-family: "SF Pro Display", "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(1200px 600px at 80% -10%, rgba(0, 113, 227, 0.03), transparent 60%),
    radial-gradient(900px 500px at -10% 20%, rgba(0, 212, 255, 0.02), transparent 55%);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  font-family: "SF Pro Display", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  letter-spacing: -0.03em;
  font-weight: 700;
}

::selection {
  background: rgba(22, 119, 255, 0.18);
  color: var(--primary-dark);
}

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 4px;
}

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

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

ul {
  list-style: none;
}

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

/* ============================================
   顶部导航栏
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(251, 251, 253, 0.72);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(251, 251, 253, 0.88);
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.04);
}

.nav-inner {
  width: 100%;
  margin: 0;
  padding: 0 32px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--dark);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.logo-img {
  width: 32px;
  height: 32px;
  object-fit: contain;
  border-radius: 6px;
}

.logo-mark {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0, 113, 227, 0.2);
}

.logo-mark svg {
  width: 18px;
  height: 18px;
  fill: #fff;
}

.nav-links {
  display: flex;
  gap: 4px;
}

.nav-links a {
  color: var(--text-light);
  padding: 6px 14px;
  border-radius: 980px;
  font-size: 14px;
  font-weight: 500;
  position: relative;
}

.nav-links a:hover {
  color: var(--dark);
  background: rgba(0, 0, 0, 0.04);
}

.nav-links a.active {
  color: var(--primary);
  background: rgba(0, 113, 227, 0.08);
}

.nav-cta {
  background: var(--primary) !important;
  color: #fff !important;
  padding: 8px 20px !important;
  border-radius: 980px;
  font-weight: 500;
  box-shadow: none;
}

.nav-cta:hover {
  background: var(--primary-dark) !important;
  transform: none;
}

.nav-download {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary) !important;
  background: rgba(0, 113, 227, 0.08);
  padding: 8px 18px !important;
  border-radius: 980px;
  font-weight: 500;
  transition: all 0.2s ease;
}

.nav-download:hover {
  background: rgba(0, 113, 227, 0.15);
  color: var(--primary-dark) !important;
}

.nav-download::before {
  content: "";
  display: inline-block;
  width: 16px;
  height: 16px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%230071e3'%3E%3Cpath d='M5 20h14v-2H5v2zM12 2L5 9h4v6h6V9h4l-7-7z'/%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--dark);
  margin: 5px 0;
  transition: var(--transition);
  border-radius: 2px;
}

/* ============================================
   通用区块
   ============================================ */
.section {
  padding: 120px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 80px;
}

.section-title h2 {
  font-size: 48px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 16px;
  letter-spacing: -0.03em;
}

.section-title p {
  font-size: 19px;
  color: var(--text-light);
  max-width: 680px;
  margin: 0 auto;
  line-height: 1.5;
}

.section-title .tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(0, 113, 227, 0.08);
  color: var(--primary);
  border-radius: 980px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

/* ============================================
   按钮
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 980px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-align: center;
}

.btn-primary {
  background: #fff;
  color: var(--primary);
  box-shadow: none;
  font-weight: 700;
}

.btn-primary:hover {
  background: #f5f5f7;
  color: var(--primary-dark);
  transform: scale(1.02);
  box-shadow: none;
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}

.btn-outline:hover {
  background: rgba(0, 113, 227, 0.05);
  border-color: var(--primary-dark);
}

.btn-ghost {
  background: rgba(0, 113, 227, 0.08);
  color: var(--primary);
}

.btn-ghost:hover {
  background: rgba(0, 113, 227, 0.12);
}

/* ============================================
   Hero 区域
   ============================================ */
.hero {
  position: relative;
  height: 100vh;
  display: flex;
  align-items: center;
  background: var(--dark-2);
  overflow: hidden;
  padding-top: 56px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(0, 113, 227, 0.12), transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(0, 212, 255, 0.08), transparent 50%),
    linear-gradient(135deg, rgba(10, 22, 40, 0.3) 0%, rgba(15, 31, 58, 0.3) 100%),
    url('../images/海浪.png') center/cover no-repeat;
  pointer-events: none;
}

.hero-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: none;
}

.hero-content {
  position: relative;
  z-index: 3;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  height: 100%;
}

.hero-text {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  text-align: center;
}

.hero-logo {
  width: 240px;
  height: auto;
  margin: 0 auto 32px;
  display: block;
}

.hero-text h1 {
  font-size: 80px;
  font-weight: 700;
  color: #fff;
  line-height: 1.1;
  margin-bottom: 28px;
  letter-spacing: -0.03em;
  text-align: center;
}

.hero-text h1 span {
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-text p {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 48px;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.8;
  font-weight: 400;
  text-align: center;
  white-space: nowrap;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.hero-stats {
  display: flex;
  gap: 48px;
  margin-top: 64px;
  justify-content: center;
}

.hero-stat .num {
  font-size: 40px;
  font-weight: 700;
  color: #fff;
  line-height: 1;
  letter-spacing: -0.02em;
}

.hero-stat .label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 8px;
}

/* Hero 底部页脚 */
.hero-footer {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 3;
  text-align: center;
  padding: 12px 24px;
}

.hero-footer-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 4px;
}

.hero-footer-links a {
  color: rgba(255, 255, 255, 0.85);
  font-size: 13px;
  text-decoration: underline;
  transition: color 0.2s ease;
}

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

.footer-divider {
  color: rgba(255, 255, 255, 0.4);
  font-size: 13px;
}

.hero-footer-copyright {
  color: rgba(255, 255, 255, 0.45);
  font-size: 12px;
}

.hero-footer-icp {
  margin-top: 4px;
  font-size: 12px;
}

.hero-footer-icp a {
  color: rgba(255, 255, 255, 0.45);
  text-decoration: none;
  transition: color 0.2s ease;
}

.hero-footer-icp a:hover {
  color: rgba(255, 255, 255, 0.7);
}

.hero-actions .btn-outline {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.hero-actions .btn-outline:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.5);
}

.app-download {
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.download-btn {
  display: inline-flex !important;
  align-items: center;
  gap: 10px;
  padding: 16px 36px !important;
  border-radius: 980px;
  font-size: 20px;
  font-weight: 500;
}

.download-btn svg {
  flex-shrink: 0; 
}

/* ============================================
   优势区块
   ============================================ */
.advantages {
  background: var(--bg-white);
}

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

.adv-card {
  text-align: center;
  padding: 40px 32px;
  border-radius: var(--radius-lg);
  background: var(--bg-white);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.adv-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.adv-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 24px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(0, 113, 227, 0.08), rgba(0, 212, 255, 0.08));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  transition: var(--transition);
}

.adv-card:hover .adv-icon {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  transform: scale(1.08);
}

.adv-card h3 {
  font-size: 19px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--dark);
}

.adv-card p {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.5;
}

/* ============================================
   卡片网格通用
   ============================================ */
.card-grid {
  display: grid;
  gap: 24px;
}

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

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

.feature-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
}

.feature-card::after {
  display: none;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.feature-card:hover::after {
  opacity: 0;
}

.feature-card:hover .card-img .card-icon {
  transform: scale(1.08);
}

.card-img {
  height: 180px;
  background: linear-gradient(135deg, var(--dark-2), var(--dark-3));
  position: relative;
  overflow: hidden;
}

.card-img::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 70% 30%, rgba(0, 212, 255, 0.3), transparent 50%),
    linear-gradient(135deg, rgba(22, 119, 255, 0.4), transparent 60%);
}

.card-img::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.6;
}

.card-img .card-icon {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  color: rgba(255, 255, 255, 0.95);
  transition: transform 0.45s var(--ease-out);
}

.card-body {
  padding: 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-body h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--dark);
}

.card-body p {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.5;
  flex: 1;
  margin-bottom: 20px;
}

.card-link {
  color: var(--primary);
  font-size: 15px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.3s ease, color 0.3s ease;
}

.card-link:hover {
  gap: 10px;
  color: var(--primary-dark);
}

/* ============================================
   新闻列表
   ============================================ */
.news-section {
  background: var(--bg);
}

.news-layout {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 40px;
}

.news-main {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.news-item {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 24px;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 20px;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.news-item:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

.news-thumb {
  height: 110px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--dark-2), var(--primary-dark));
  position: relative;
  overflow: hidden;
}

.news-thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, rgba(0, 212, 255, 0.4), transparent 60%);
}

.news-info h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--dark);
  line-height: 1.4;
}

.news-info p {
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 10px;
  line-height: 1.5;
}

.news-meta {
  display: flex;
  gap: 18px;
  font-size: 13px;
  color: var(--text-muted);
}

.news-meta span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.news-side {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid var(--border);
  height: fit-content;
}

.news-side h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--dark);
  padding-bottom: 14px;
  border-bottom: 2px solid var(--border);
}

.news-side ul {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.news-side li a {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--text);
  transition: var(--transition);
}

.news-side li a:hover {
  color: var(--primary);
  transform: translateX(4px);
}

.news-side .num {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 6px;
  background: rgba(22, 119, 255, 0.1);
  color: var(--primary);
  font-weight: 700;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ============================================
   关于/数据
   ============================================ */
.about-section {
  background: var(--bg-white);
}

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-text h2 {
  font-size: 40px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--dark);
  letter-spacing: -0.03em;
}

.about-text p {
  font-size: 16px;
  color: var(--text-light);
  margin-bottom: 18px;
  line-height: 1.8;
}

.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 36px;
}

.stat-box {
  text-align: center;
  padding: 28px 12px;
  background: var(--bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.stat-box .num {
  font-size: 40px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.02em;
}

.stat-box .label {
  font-size: 13px;
  color: var(--text-light);
  margin-top: 4px;
}

.about-visual {
  height: 420px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--dark-2), var(--primary-dark));
  position: relative;
  overflow: hidden;
}

.about-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 30% 40%, rgba(0, 212, 255, 0.5), transparent 50%),
    radial-gradient(circle at 70% 70%, rgba(22, 119, 255, 0.5), transparent 50%);
}

/* ============================================
   联系区块
   ============================================ */
.contact-section {
  background: var(--bg);
  position: relative;
  overflow: hidden;
}

.contact-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 80% 20%, rgba(0, 113, 227, 0.06), transparent 50%),
    radial-gradient(circle at 10% 80%, rgba(0, 113, 227, 0.04), transparent 50%);
}

.contact-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.contact-info h2 {
  font-size: 40px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 16px;
  letter-spacing: -0.03em;
}

.contact-info > p {
  color: var(--gray);
  margin-bottom: 36px;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-list li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  color: var(--dark);
}

.contact-list .c-icon {
  flex-shrink: 0;
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: rgba(0, 113, 227, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}

.contact-list .label {
  font-size: 13px;
  color: var(--gray);
  margin-bottom: 4px;
}

.contact-list .value {
  font-size: 16px;
  font-weight: 500;
}

.contact-form {
  background: var(--bg-white);
  backdrop-filter: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
}

.contact-form h3 {
  color: var(--dark);
  font-size: 22px;
  margin-bottom: 24px;
}

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

.form-group label {
  display: block;
  color: var(--gray);
  font-size: 14px;
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--dark);
  font-size: 14px;
  transition: var(--transition);
  font-family: inherit;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--gray-light);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  background: var(--bg-white);
}

.form-group textarea {
  resize: vertical;
  min-height: 110px;
}

/* ============================================
   页面头部 Banner（内页）
   ============================================ */
.page-banner {
  position: relative;
  padding: 140px 0 90px;
  background: var(--dark);
  overflow: hidden;
}

.page-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(0, 113, 227, 0.3), transparent 50%),
    radial-gradient(circle at 80% 30%, rgba(0, 212, 255, 0.15), transparent 50%),
    linear-gradient(135deg, #0a1628 0%, #0f1f3a 100%);
}

.page-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: none;
}

/* 海浪背景图版本 — 用于下载中心/联系我们 */
.page-banner-sea::before {
  background:
    linear-gradient(135deg, rgba(10, 22, 40, 0.55) 0%, rgba(15, 31, 58, 0.55) 100%),
    url("../images/海浪.png") center/cover no-repeat;
}

/* 海浪背景图 section — 用于系统要求等区块 */
.section-sea-bg {
  position: relative;
  background:
    linear-gradient(135deg, rgba(10, 22, 40, 0.75) 0%, rgba(15, 31, 58, 0.75) 100%),
    url("../images/海浪.png") center/cover no-repeat;
}

.section-sea-bg .section-title h2,
.section-sea-bg .section-title .tag {
  color: #fff;
}

.section-sea-bg .download-card {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(8px);
}

.section-sea-bg .download-card h3,
.section-sea-bg .sys-req li span:last-child {
  color: #fff;
}

.section-sea-bg .platform-version,
.section-sea-bg .qr-tip,
.section-sea-bg .sys-req li span:first-child {
  color: rgba(255, 255, 255, 0.7);
}

.page-banner-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  color: #fff;
}

.page-banner h1 {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.03em;
}

.page-banner p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.7);
  max-width: 640px;
  margin: 0 auto;
}

.breadcrumb {
  margin-top: 24px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
}

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

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

/* ============================================
   页脚
   ============================================ */
.footer {
  background: #f5f5f7;
  padding: 60px 0 0;
  color: var(--text-light);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
}

.footer-brand .logo {
  margin-bottom: 18px;
  color: var(--dark);
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 20px;
}

.footer-col h4 {
  color: var(--dark);
  font-size: 15px;
  margin-bottom: 20px;
  font-weight: 600;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col ul a {
  font-size: 14px;
  color: var(--text-light);
  transition: var(--transition);
}

.footer-col ul a:hover {
  color: var(--primary);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--text-muted);
}

.footer-bottom .links {
  display: flex;
  gap: 24px;
}

/* ============================================
   动画
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* 页面加载交错入场动画 */
@keyframes revealUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.reveal {
  opacity: 0;
  animation: revealUp 0.7s var(--ease-out) forwards;
}

.reveal-delay-1 { animation-delay: 0.08s; }
.reveal-delay-2 { animation-delay: 0.16s; }
.reveal-delay-3 { animation-delay: 0.24s; }
.reveal-delay-4 { animation-delay: 0.32s; }
.reveal-delay-5 { animation-delay: 0.40s; }

/* 新闻元信息图标 */
.news-meta .meta-icon {
  width: 15px;
  height: 15px;
  vertical-align: -2px;
  margin-right: 4px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
}

/* 滚动条美化 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: #c7c7cc;
  border-radius: 4px;
  border: none;
}
::-webkit-scrollbar-thumb:hover {
  background: #8e8e93;
}

/* ============================================
   响应式
   ============================================ */
@media (max-width: 992px) {
  .hero-content,
  .about-grid,
  .contact-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-text h1 {
    font-size: 48px;
  }

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

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

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

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

  .section {
    padding: 80px 0;
  }

  .section-title h2 {
    font-size: 36px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: rgba(251, 251, 253, 0.95);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    flex-direction: column;
    padding: 16px;
    gap: 4px;
    border-bottom: 1px solid var(--border);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    color: var(--dark);
  }

  .menu-toggle {
    display: block;
  }

  .hero-text h1 {
    font-size: 36px;
  }

  .hero-stats {
    gap: 24px;
  }

  .section {
    padding: 60px 0;
  }

  .section-title h2 {
    font-size: 28px;
  }

  .products-grid,
  .sol-grid,
  .adv-grid {
    grid-template-columns: 1fr;
  }

  .news-item {
    grid-template-columns: 1fr;
  }

  .news-thumb {
    height: 140px;
  }

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

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

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}

/* ============================================
   下载中心页 - 全部内容居中
   ============================================ */
.download-section,
.download-section .container,
.download-section .section-title,
.download-section .section-title h2,
.download-section .section-title p {
  text-align: center;
}

.download-cards {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: stretch;
  gap: 32px;
}

.download-card {
  width: 100%;
  max-width: 420px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 40px 32px;
  border-radius: var(--radius-lg);
  background: var(--bg-white);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
}

.download-platform,
.download-platform * {
  text-align: center;
}

.platform-icon {
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(0, 113, 227, 0.08);
  color: var(--primary);
}

.platform-android {
  color: #3ddc84;
  background: rgba(61, 220, 132, 0.1);
}

.platform-ios {
  color: #1d1d1f;
  background: rgba(29, 29, 31, 0.06);
}

.platform-version {
  margin-top: 6px;
  color: var(--text-muted);
  font-size: 13px;
}

.download-qr {
  margin: 24px auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.qr-box {
  width: 120px;
  height: 120px;
  margin: 0 auto;
  padding: 8px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.qr-tip {
  margin-top: 10px;
  font-size: 13px;
  color: var(--text-light);
}

.download-action {
  margin-top: 8px;
}

.sys-req {
  list-style: none;
  padding: 0;
  margin: 16px 0 0;
  width: 100%;
}

.sys-req li {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

.sys-req li:last-child {
  border-bottom: none;
}

.sys-req li span:first-child {
  color: var(--text-light);
}

.sys-req li span:last-child {
  color: var(--text);
  font-weight: 500;
}