/* ============================================================
   橙子云企业主页 - 样式表
   设计语言：简洁、专业、可信赖
   主色：#FF8C00 (橙) 辅色：#1a1a2e (深蓝黑)
   ============================================================ */

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

:root {
  --primary: #FF8C00;
  --primary-light: #FFA940;
  --primary-dark: #E07800;
  --text: #1a1a2e;
  --text-secondary: #5a5a6e;
  --text-muted: #8c8c9a;
  --bg: #ffffff;
  --bg-gray: #f7f8fa;
  --bg-dark: #1a1a2e;
  --border: #e8e8ed;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 2px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.08);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}

.navbar.scrolled {
  border-bottom-color: var(--border);
  box-shadow: 0 1px 8px rgba(0,0,0,0.04);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
}

.logo-icon {
  color: var(--primary);
  font-size: 1.5rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}

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

.btn-nav {
  padding: 8px 20px;
  background: var(--primary);
  color: #fff !important;
  border-radius: 6px;
  font-size: 0.875rem !important;
  transition: background var(--transition) !important;
}

.btn-nav:hover {
  background: var(--primary-dark) !important;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 160px 0 120px;
  overflow: hidden;
  background: linear-gradient(160deg, #fffbf5 0%, #fff4e6 30%, #f0f5ff 100%);
}

.hero-bg {
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,140,0,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  text-align: center;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero-title-line {
  display: block;
}

.hero-title-highlight {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.2rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
}

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

.tag {
  padding: 6px 16px;
  background: rgba(255,140,0,0.08);
  color: var(--primary-dark);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(255,140,0,0.3);
}

.btn-primary:hover {
  background: var(--primary-dark);
  box-shadow: 0 6px 24px rgba(255,140,0,0.4);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.btn-lg {
  padding: 18px 40px;
  font-size: 1.1rem;
}

/* ===== 通用段落 ===== */
.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* ===== 痛点 ===== */
.pain-points {
  padding: 100px 0;
  background: var(--bg);
}

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

.pain-card {
  padding: 32px 28px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.pain-card:hover {
  border-color: transparent;
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.pain-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.pain-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.pain-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== 核心优势 ===== */
.highlights {
  padding: 100px 0;
  background: var(--bg-gray);
}

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

.highlight-card {
  padding: 36px 32px;
  background: var(--bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: all var(--transition);
}

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

.highlight-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
  opacity: 0.3;
  margin-bottom: 16px;
  line-height: 1;
}

.highlight-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.highlight-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== 功能模块 ===== */
.modules {
  padding: 100px 0;
  background: var(--bg);
}

.module-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.module-card {
  padding: 32px 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  text-align: center;
  transition: all var(--transition);
}

.module-card:hover {
  border-color: transparent;
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.module-icon-wrap {
  width: 52px;
  height: 52px;
  margin: 0 auto 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  color: var(--accent);
}

.module-icon-wrap svg {
  width: 26px;
  height: 26px;
}

.module-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.module-card p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ===== 数据概览 ===== */
.stats {
  padding: 80px 0;
  background: var(--bg-dark);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
}

/* ===== CTA ===== */
.cta {
  padding: 100px 0;
  background: linear-gradient(160deg, #fff8f0 0%, #f0f5ff 100%);
}

.cta-content {
  text-align: center;
}

.cta-content h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-content p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 36px;
}

/* ===== 页脚 ===== */
.footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.8);
  padding-top: 64px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand .logo-icon {
  color: var(--primary);
}

.footer-brand .logo-text {
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
}

.footer-slogan {
  margin-top: 8px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
}

.footer-links {
  display: flex;
  gap: 64px;
}

.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: rgba(255,255,255,0.9);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
  text-decoration: none;
  margin-bottom: 8px;
  transition: color var(--transition);
}

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

.footer-bottom {
  padding: 20px 0;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.35);
}

.footer-bottom a {
  color: rgba(255,255,255,0.45);
  text-decoration: none;
}

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

/* ===== 弹窗 ===== */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.5);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
}

.modal-overlay.active {
  display: flex;
}

.modal-content {
  background: #fff;
  border-radius: var(--radius);
  padding: 32px;
  max-width: 420px;
  width: 90%;
  text-align: center;
  position: relative;
  box-shadow: 0 20px 60px rgba(0,0,0,0.15);
  animation: modalIn 0.25s ease;
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.92); }
  to { opacity: 1; transform: scale(1); }
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 16px;
  background: none;
  border: none;
  font-size: 1.6rem;
  color: var(--text-muted);
  cursor: pointer;
  line-height: 1;
  transition: color var(--transition);
}

.modal-close:hover {
  color: var(--text);
}

.modal-content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.modal-content p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.modal-content img {
  max-width: 260px;
  height: auto;
  border-radius: 8px;
}

/* ===== 动画 ===== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .module-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .hero {
    padding: 120px 0 80px;
  }

  .hero-title {
    font-size: 2.2rem;
  }

  .hero-desc {
    font-size: 1rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

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

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

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .nav-links a:not(.btn-nav) {
    display: none;
  }

  .footer-inner {
    flex-direction: column;
    gap: 32px;
  }
}

@media (max-width: 480px) {
  .pain-grid,
  .highlight-grid,
  .module-grid {
    grid-template-columns: 1fr;
  }

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

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