/* ========== 全局重置与变量 ========== */
:root {
  --primary: #4f6bff;
  --primary-dark: #3a52e0;
  --primary-light: #7b8fff;
  --accent: #00d4ff;
  --accent2: #a855f7;
  --bg-dark: #0a0e1a;
  --bg-card: #131829;
  --bg-card-hover: #1a2138;
  --text-primary: #e8ecf4;
  --text-secondary: #9aa4bf;
  --text-muted: #6b7590;
  --border: rgba(255,255,255,0.08);
  --border-hover: rgba(79,107,255,0.4);
  --gradient-1: linear-gradient(135deg, #4f6bff 0%, #00d4ff 100%);
  --gradient-2: linear-gradient(135deg, #a855f7 0%, #4f6bff 100%);
  --gradient-3: linear-gradient(135deg, #00d4ff 0%, #10b981 100%);
  --shadow-glow: 0 0 40px rgba(79,107,255,0.3);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== 导航栏 ========== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 16px 0;
  background: rgba(10,14,26,0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.navbar.scrolled {
  padding: 12px 0;
  background: rgba(10,14,26,0.95);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
}
.logo-icon {
  width: 36px; height: 36px;
  background: var(--gradient-1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #fff;
}
.logo span { background: var(--gradient-1); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.nav-links { display: flex; gap: 32px; }
.nav-links a {
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}
.nav-links a:hover, .nav-links a.active { color: var(--text-primary); }
.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -6px; left: 0; right: 0;
  height: 2px;
  background: var(--gradient-1);
  border-radius: 2px;
}
.nav-cta {
  display: flex;
  gap: 12px;
  align-items: center;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--gradient-1);
  color: #fff;
  box-shadow: 0 4px 20px rgba(79,107,255,0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(79,107,255,0.5); }
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-outline:hover { border-color: var(--primary); background: rgba(79,107,255,0.1); }
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}
.btn-ghost:hover { color: var(--text-primary); }
.btn-lg { padding: 14px 32px; font-size: 16px; }

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 24px;
  cursor: pointer;
}

/* ========== 英雄区 ========== */
.hero {
  padding: 160px 0 100px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%; left: 50%;
  transform: translateX(-50%);
  width: 800px; height: 800px;
  background: radial-gradient(circle, rgba(79,107,255,0.15) 0%, transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  top: 20%; right: -10%;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(0,212,255,0.1) 0%, transparent 70%);
  pointer-events: none;
}
.hero-content {
  text-align: center;
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(79,107,255,0.1);
  border: 1px solid rgba(79,107,255,0.3);
  border-radius: 50px;
  font-size: 13px;
  color: var(--primary-light);
  margin-bottom: 28px;
}
.hero-badge .dot {
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.hero h1 {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 24px;
  letter-spacing: -1px;
}
.hero h1 .gradient-text {
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p {
  font-size: 19px;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}
.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 60px;
  flex-wrap: wrap;
}
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 60px;
  flex-wrap: wrap;
}
.stat-item { text-align: center; }
.stat-num {
  font-size: 36px;
  font-weight: 800;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat-label {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ========== 通用区块 ========== */
.section {
  padding: 100px 0;
  position: relative;
}
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 60px;
}
.section-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(79,107,255,0.1);
  border: 1px solid rgba(79,107,255,0.25);
  border-radius: 50px;
  font-size: 13px;
  color: var(--primary-light);
  margin-bottom: 16px;
  font-weight: 500;
}
.section-title {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.section-desc {
  font-size: 17px;
  color: var(--text-secondary);
}

/* ========== 核心功能网格 ========== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient-1);
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}
.feature-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  background: var(--bg-card-hover);
}
.feature-card:hover::before { transform: scaleX(1); }
.feature-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
}
.feature-icon.blue { background: rgba(79,107,255,0.15); color: var(--primary-light); }
.feature-icon.cyan { background: rgba(0,212,255,0.15); color: var(--accent); }
.feature-icon.purple { background: rgba(168,85,247,0.15); color: var(--accent2); }
.feature-icon.green { background: rgba(16,185,129,0.15); color: #10b981; }
.feature-icon.orange { background: rgba(245,158,11,0.15); color: #f59e0b; }
.feature-icon.pink { background: rgba(236,72,153,0.15); color: #ec4899; }
.feature-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}
.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}
.feature-card .feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 16px;
}
.feature-card .feature-tags span {
  padding: 4px 10px;
  background: rgba(255,255,255,0.04);
  border-radius: 6px;
  font-size: 12px;
  color: var(--text-muted);
}

/* ========== 产品亮点（左右布局） ========== */
.highlight-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
}
.highlight-row:last-child { margin-bottom: 0; }
.highlight-row.reverse .highlight-text { order: 2; }
.highlight-row.reverse .highlight-visual { order: 1; }
.highlight-text h3 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 20px;
  line-height: 1.3;
}
.highlight-text p {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}
.highlight-list { display: flex; flex-direction: column; gap: 14px; }
.highlight-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 15px;
  color: var(--text-secondary);
}
.highlight-list li .check {
  flex-shrink: 0;
  width: 22px; height: 22px;
  background: var(--gradient-1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: #fff;
  margin-top: 2px;
}
.highlight-visual {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.mock-window {
  width: 100%;
  background: var(--bg-dark);
  border-radius: 12px;
  border: 1px solid var(--border);
  overflow: hidden;
}
.mock-window-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(255,255,255,0.03);
  border-bottom: 1px solid var(--border);
}
.mock-window-bar .dot { width: 12px; height: 12px; border-radius: 50%; }
.mock-window-bar .dot.red { background: #ff5f57; }
.mock-window-bar .dot.yellow { background: #febc2e; }
.mock-window-bar .dot.green { background: #28c840; }
.mock-window-bar .title { margin-left: 12px; font-size: 12px; color: var(--text-muted); }
.mock-window-body { padding: 20px; }
.mock-chat { display: flex; flex-direction: column; gap: 12px; }
.mock-msg {
  max-width: 80%;
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 13px;
  line-height: 1.5;
}
.mock-msg.user {
  align-self: flex-end;
  background: var(--primary);
  color: #fff;
  border-bottom-right-radius: 4px;
}
.mock-msg.ai {
  align-self: flex-start;
  background: rgba(255,255,255,0.05);
  color: var(--text-secondary);
  border-bottom-left-radius: 4px;
}
.mock-msg.ai .step {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  font-size: 12px;
}
.mock-msg.ai .step .icon {
  width: 18px; height: 18px;
  background: rgba(0,212,255,0.2);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
}
.mock-input-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  padding: 10px 14px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.mock-input-bar .input-text { flex: 1; font-size: 13px; color: var(--text-muted); }
.mock-input-bar .send-btn {
  width: 28px; height: 28px;
  background: var(--gradient-1);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
}

/* ========== 套件展示 ========== */
.suites-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.suite-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: var(--transition);
  position: relative;
}
.suite-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
}
.suite-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 16px;
}
.suite-badge.hot { background: rgba(236,72,153,0.15); color: #ec4899; }
.suite-badge.new { background: rgba(16,185,129,0.15); color: #10b981; }
.suite-badge.pro { background: rgba(168,85,247,0.15); color: var(--accent2); }
.suite-card h3 { font-size: 22px; font-weight: 700; margin-bottom: 12px; }
.suite-card > p { font-size: 14px; color: var(--text-secondary); margin-bottom: 20px; }
.suite-features { display: flex; flex-direction: column; gap: 10px; }
.suite-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-secondary);
}
.suite-features li::before {
  content: '✓';
  color: var(--accent);
  font-weight: 700;
}

/* ========== 应用场景 ========== */
.scenarios-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.scenario-tab {
  padding: 10px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 50px;
  font-size: 14px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}
.scenario-tab:hover { border-color: var(--border-hover); color: var(--text-primary); }
.scenario-tab.active {
  background: var(--gradient-1);
  border-color: transparent;
  color: #fff;
}
.scenario-panel {
  display: none;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.scenario-panel.active { display: grid; animation: fadeIn 0.4s ease; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
.scenario-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  gap: 20px;
  transition: var(--transition);
}
.scenario-card:hover { border-color: var(--border-hover); background: var(--bg-card-hover); }
.scenario-card .sc-icon {
  flex-shrink: 0;
  width: 48px; height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}
.scenario-card h4 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.scenario-card p { font-size: 13px; color: var(--text-secondary); }

/* ========== 定价 ========== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}
.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
}
.pricing-card:hover { transform: translateY(-4px); }
.pricing-card.featured {
  border-color: var(--primary);
  background: linear-gradient(180deg, rgba(79,107,255,0.08) 0%, var(--bg-card) 100%);
  box-shadow: var(--shadow-glow);
}
.pricing-card.featured::before {
  content: '推荐';
  position: absolute;
  top: -12px; left: 50%;
  transform: translateX(-50%);
  padding: 4px 16px;
  background: var(--gradient-1);
  border-radius: 50px;
  font-size: 12px;
  font-weight: 600;
  color: #fff;
}
.pricing-name { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.pricing-desc { font-size: 13px; color: var(--text-muted); margin-bottom: 24px; }
.pricing-price { margin-bottom: 24px; }
.pricing-price .amount { font-size: 42px; font-weight: 800; }
.pricing-price .unit { font-size: 14px; color: var(--text-muted); }
.pricing-features { flex: 1; display: flex; flex-direction: column; gap: 12px; margin-bottom: 28px; }
.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
}
.pricing-features li .icon { color: var(--accent); font-weight: 700; }
.pricing-card .btn { width: 100%; justify-content: center; }

/* ========== CTA 区块 ========== */
.cta-section {
  padding: 80px 0;
}
.cta-box {
  background: linear-gradient(135deg, rgba(79,107,255,0.15) 0%, rgba(0,212,255,0.1) 100%);
  border: 1px solid rgba(79,107,255,0.3);
  border-radius: 24px;
  padding: 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-box::before {
  content: '';
  position: absolute;
  top: -50%; right: -20%;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(79,107,255,0.2) 0%, transparent 70%);
}
.cta-box h2 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 16px;
  position: relative;
}
.cta-box p {
  font-size: 17px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  position: relative;
}
.cta-box .hero-actions { position: relative; margin-bottom: 0; }

/* ========== 页脚 ========== */
.footer {
  border-top: 1px solid var(--border);
  padding: 60px 0 30px;
  background: rgba(0,0,0,0.2);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 16px;
  max-width: 280px;
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a {
  font-size: 13px;
  color: var(--text-muted);
  transition: var(--transition);
}
.footer-col a:hover { color: var(--primary-light); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 12px;
}

/* ========== 功能详情页 ========== */
.page-hero {
  padding: 140px 0 60px;
  text-align: center;
}
.page-hero h1 {
  font-size: 44px;
  font-weight: 800;
  margin-bottom: 16px;
}
.page-hero p {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
}
.feature-detail-section {
  padding: 60px 0;
}
.feature-detail-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding: 60px 0;
  border-bottom: 1px solid var(--border);
}
.feature-detail-row:last-child { border-bottom: none; }
.feature-detail-row.reverse .detail-text { order: 2; }
.feature-detail-row.reverse .detail-visual { order: 1; }
.detail-text .num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  background: var(--gradient-1);
  border-radius: 10px;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}
.detail-text h3 { font-size: 28px; font-weight: 800; margin-bottom: 16px; }
.detail-text p { font-size: 15px; color: var(--text-secondary); margin-bottom: 20px; }
.detail-text .detail-points { display: flex; flex-direction: column; gap: 10px; }
.detail-text .detail-points li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
}
.detail-text .detail-points li::before {
  content: '';
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
}
.detail-visual {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  min-height: 280px;
}

/* ========== 时间线/流程 ========== */
.timeline {
  position: relative;
  padding-left: 40px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 12px; top: 8px; bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
}
.timeline-item {
  position: relative;
  padding-bottom: 28px;
}
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: '';
  position: absolute;
  left: -34px; top: 6px;
  width: 14px; height: 14px;
  background: var(--bg-dark);
  border: 3px solid var(--primary);
  border-radius: 50%;
}
.timeline-item h4 { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.timeline-item p { font-size: 13px; color: var(--text-secondary); }

/* ========== 数据看板 mock ========== */
.data-mock {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.data-mock-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
}
.data-mock-card .label { font-size: 11px; color: var(--text-muted); margin-bottom: 6px; }
.data-mock-card .value { font-size: 22px; font-weight: 700; }
.data-mock-card .value.up { color: #10b981; }
.data-mock-card .bar {
  height: 4px;
  background: rgba(255,255,255,0.06);
  border-radius: 2px;
  margin-top: 8px;
  overflow: hidden;
}
.data-mock-card .bar-fill {
  height: 100%;
  background: var(--gradient-1);
  border-radius: 2px;
}

/* ========== 关于页 ========== */
.about-hero {
  padding: 140px 0 80px;
  text-align: center;
}
.about-hero h1 { font-size: 48px; font-weight: 800; margin-bottom: 20px; }
.about-hero p { font-size: 18px; color: var(--text-secondary); max-width: 700px; margin: 0 auto; }
.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.value-card {
  text-align: center;
  padding: 32px 20px;
}
.value-card .v-icon {
  width: 56px; height: 56px;
  margin: 0 auto 16px;
  background: var(--gradient-1);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}
.value-card h4 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.value-card p { font-size: 13px; color: var(--text-secondary); }
.tech-stack {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.tech-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px;
  text-align: center;
  transition: var(--transition);
}
.tech-item:hover { border-color: var(--border-hover); }
.tech-item .t-icon { font-size: 28px; margin-bottom: 8px; }
.tech-item h5 { font-size: 14px; font-weight: 600; }
.tech-item p { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

/* ========== FAQ ========== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
}
.faq-question {
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
  transition: var(--transition);
}
.faq-question:hover { background: var(--bg-card-hover); }
.faq-question .arrow {
  transition: transform 0.3s;
  color: var(--text-muted);
  font-size: 18px;
}
.faq-item.open .faq-question .arrow { transform: rotate(180deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}
.faq-item.open .faq-answer { max-height: 300px; }
.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .features-grid, .suites-grid, .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .highlight-row, .feature-detail-row { grid-template-columns: 1fr; gap: 32px; }
  .highlight-row.reverse .highlight-text, .feature-detail-row.reverse .detail-text { order: 1; }
  .highlight-row.reverse .highlight-visual, .feature-detail-row.reverse .detail-visual { order: 2; }
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
  .values-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-stack { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta .btn-outline { display: none; }
  .mobile-menu-btn { display: block; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--bg-dark);
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    gap: 16px;
  }
  .hero { padding: 120px 0 60px; }
  .hero h1 { font-size: 36px; }
  .hero p { font-size: 16px; }
  .hero-stats { gap: 32px; }
  .stat-num { font-size: 28px; }
  .section { padding: 60px 0; }
  .section-title { font-size: 28px; }
  .features-grid, .suites-grid, .pricing-grid, .scenario-panel { grid-template-columns: 1fr; }
  .page-hero h1, .about-hero h1 { font-size: 32px; }
  .cta-box { padding: 40px 24px; }
  .cta-box h2 { font-size: 26px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 28px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .values-grid, .tech-stack { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}