/* 成都金泉海科技 - 官网样式 | 标准 Web 技术，响应式 */
:root {
  --color-primary: #1a5f7a;
  --color-primary-light: #2d8ba8;
  --color-primary-dark: #0d3d4d;
  --color-accent: #c38e4a;
  --color-bg: #f8f9fa;
  --color-card: #ffffff;
  --color-text: #212121;
  --color-text-muted: #5f6368;
  --color-border: #e8eaed;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.1);
  --radius: 8px;
  --header-h: 64px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
}

/* ========== 头部导航 ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: var(--color-card);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
}

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

.nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
  font-size: 1.5rem;
  color: var(--color-text);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
    margin-left: auto;
  }
  .nav-links {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--color-card);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    box-shadow: var(--shadow-hover);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s, opacity 0.3s;
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
}

/* ========== 主内容区 ========== */
.main-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 64px;
}

@media (max-width: 768px) {
  .main-content {
    padding: 28px 16px 48px;
  }
}

/* ========== 首页 Hero ========== */
.hero {
  text-align: center;
  padding: 72px 24px 88px;
  background: linear-gradient(160deg, #e8f4f8 0%, var(--color-bg) 100%);
  border-radius: var(--radius);
  margin-bottom: 56px;
}

.hero h1 {
  font-size: 2.25rem;
  margin-bottom: 16px;
  color: var(--color-text);
  font-weight: 600;
}

.hero .company-name {
  color: var(--color-primary);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.hero p {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto 28px;
}

.hero .btn {
  margin: 8px 12px 8px 0;
}

@media (max-width: 768px) {
  .hero {
    padding: 44px 16px 56px;
    margin-bottom: 40px;
  }
  .hero h1 {
    font-size: 1.6rem;
  }
  .hero .company-name {
    font-size: 1.25rem;
  }
  .hero p {
    font-size: 0.95rem;
  }
  .hero .btn {
    display: block;
    margin: 8px auto;
  }
}

/* ========== 区块标题 ========== */
.section-title {
  font-size: 1.5rem;
  margin-bottom: 28px;
  color: var(--color-text);
  padding-bottom: 10px;
  border-bottom: 3px solid var(--color-primary);
  display: inline-block;
  font-weight: 600;
}

.section {
  margin-bottom: 56px;
}

.section p {
  color: var(--color-text-muted);
  max-width: 720px;
  margin-bottom: 20px;
}

/* ========== 卡片网格 ========== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.card {
  background: var(--color-card);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--color-border);
  transition: box-shadow 0.2s, transform 0.2s;
}

.card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.card h3 {
  font-size: 1.125rem;
  margin-bottom: 10px;
  color: var(--color-primary-dark);
  font-weight: 600;
}

.card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* ========== 按钮 ========== */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  font-family: var(--font-sans);
}

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

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

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

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

/* ========== 页脚 ========== */
.site-footer {
  background: var(--color-card);
  border-top: 1px solid var(--color-border);
  padding: 36px 24px;
  margin-top: 56px;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.site-footer p + p {
  margin-top: 10px;
}

.site-footer a {
  color: var(--color-primary);
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

/* ========== 下载页 ========== */
.download-hero {
  text-align: center;
  padding: 52px 24px 60px;
  background: linear-gradient(160deg, #e8f4f8 0%, var(--color-bg) 100%);
  border-radius: var(--radius);
  margin-bottom: 48px;
}

.download-hero h1 {
  font-size: 1.75rem;
  margin-bottom: 12px;
  color: var(--color-text);
  font-weight: 600;
}

.download-hero .app-name {
  color: var(--color-primary);
  font-weight: 700;
}

.download-hero > p {
  color: var(--color-text-muted);
  margin-bottom: 36px;
}

.download-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  max-width: 560px;
  margin: 0 auto 40px;
}

.download-card {
  background: var(--color-card);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 2px solid var(--color-border);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.download-card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-hover);
}

.download-card .icon {
  font-size: 3rem;
  margin-bottom: 16px;
  line-height: 1;
}

.download-card h3 {
  font-size: 1.25rem;
  margin-bottom: 8px;
  color: var(--color-text);
  font-weight: 600;
}

.download-card p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.download-card .btn {
  width: 100%;
  text-align: center;
}

.download-note {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  max-width: 520px;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .download-hero {
    padding: 36px 16px 44px;
    margin-bottom: 36px;
  }
  .download-hero h1 {
    font-size: 1.4rem;
  }
  .download-cards {
    gap: 16px;
  }
}

/* ========== 内页通用 ========== */
.page-title {
  font-size: 1.75rem;
  margin-bottom: 12px;
  color: var(--color-text);
  font-weight: 600;
}

.page-lead {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  margin-bottom: 40px;
  max-width: 640px;
}

.contact-list {
  list-style: none;
}

.contact-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

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

.contact-list strong {
  color: var(--color-text);
  display: inline-block;
  min-width: 80px;
}

.solutions-list {
  list-style: none;
}

.solutions-list li {
  padding: 16px 20px;
  margin-bottom: 12px;
  background: var(--color-card);
  border-radius: var(--radius);
  border-left: 4px solid var(--color-primary);
  box-shadow: var(--shadow);
}

.solutions-list li h3 {
  font-size: 1.1rem;
  margin-bottom: 6px;
  color: var(--color-primary-dark);
}

.solutions-list li p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.about-intro {
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 32px;
}

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

.product-feature h3 {
  font-size: 1.1rem;
  color: var(--color-primary-dark);
  margin-bottom: 8px;
}

.product-feature p {
  margin: 0;
  font-size: 0.95rem;
}