/* ============================================
   Clash Verge Lab — 实验室风格
   主色调：靛蓝→紫罗兰 (#4F46E5 → #7C3AED)
   排版：极简实验室风，状态标签、时间线、卡片网格
   ============================================ */

/* ===== CSS 变量系统 ===== */
:root {
  /* 主色调 — 靛蓝到紫罗兰 */
  --primary: #4F46E5;
  --primary-dark: #3730A3;
  --primary-light: #818CF8;
  --primary-lighter: #EEF2FF;
  --secondary: #7C3AED;
  --secondary-dark: #6D28D9;
  --accent: #06B6D4;
  --gradient-start: #4F46E5;
  --gradient-end: #7C3AED;

  /* 功能色 */
  --success: #10B981;
  --success-bg: #ECFDF5;
  --success-text: #065F46;
  --warning: #F59E0B;
  --warning-bg: #FFFBEB;
  --warning-text: #92400E;
  --danger: #EF4444;
  --danger-bg: #FEF2F2;
  --danger-text: #991B1B;
  --info: #3B82F6;
  --info-bg: #EFF6FF;
  --info-text: #1E40AF;

  /* 实验室状态色 */
  --stable-color: #10B981;
  --beta-color: #F59E0B;
  --experimental-color: #8B5CF6;
  --idea-color: #94A3B8;

  /* 文字色 */
  --text-primary: #1E293B;
  --text-secondary: #475569;
  --text-muted: #94A3B8;

  /* 背景色 — 浅色清爽 */
  --bg: #FFFFFF;
  --bg-card: #FFFFFF;
  --bg-secondary: #F8FAFC;
  --bg-tertiary: #F1F5F9;
  --bg-lab: #F5F3FF;

  /* 边框/阴影 */
  --border: #E2E8F0;
  --border-light: #F1F5F9;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.1);
  --shadow-purple: 0 4px 20px rgba(79,70,229,0.15);

  /* 圆角 */
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;
  --radius-full: 9999px;

  /* 过渡 */
  --transition: 0.25s ease;
  --transition-fast: 150ms ease;
}

/* ===== 全局重置 ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", "PingFang SC", sans-serif;
  color: var(--text-primary); background: var(--bg);
  line-height: 1.7; font-size: 15px; min-height: 100vh;
  display: flex; flex-direction: column; overflow-x: hidden;
}

a { text-decoration: none; color: var(--primary); transition: color var(--transition-fast); }
a:hover { color: var(--primary-dark); }

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

ul, ol { list-style: none; padding: 0; margin: 0; }

/* ===== 容器 ===== */
.container { width: 100%; max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* ===== 导航栏 ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: all var(--transition);
}
.navbar.scrolled {
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}
.navbar .container {
  display: flex; align-items: center; justify-content: space-between; height: 60px;
}

.logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 16px; font-weight: 700; color: var(--text-primary);
  white-space: nowrap; flex-shrink: 0;
}
.logo:hover { color: var(--text-primary); }
.logo-icon {
  width: 32px; height: 32px; border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; flex-shrink: 0; color: #fff;
}

.navbar-nav {
  display: flex; align-items: center; gap: 4px;
  list-style: none; margin: 0; padding: 0; flex-shrink: 0;
}
.nav-link {
  padding: 8px 16px; font-size: 14px; font-weight: 500;
  color: var(--text-secondary); border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}
.nav-link:hover, .nav-link.active { color: var(--primary); background: var(--primary-lighter); }

.mobile-menu-btn {
  display: none; width: 38px; height: 38px; align-items: center; justify-content: center;
  cursor: pointer; border-radius: var(--radius-sm); border: none; background: transparent;
}
.mobile-menu-btn span {
  display: block; width: 20px; height: 2px; background: var(--text-primary);
  position: relative; transition: all var(--transition);
}
.mobile-menu-btn span::before, .mobile-menu-btn span::after {
  content: ''; position: absolute; width: 20px; height: 2px;
  background: var(--text-primary); left: 0; transition: all var(--transition);
}
.mobile-menu-btn span::before { top: -6px; }
.mobile-menu-btn span::after { top: 6px; }

@media (max-width: 768px) {
  .mobile-menu-btn { display: flex; }
  .logo { font-size: 14px; gap: 8px; }
  .logo-icon { width: 28px; height: 28px; font-size: 14px; }
  .navbar-nav {
    position: fixed; top: 60px; left: 0; right: 0;
    background: rgba(255,255,255,0.98); backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-direction: column; padding: 14px; gap: 2px;
    transform: translateY(-120%); opacity: 0; pointer-events: none;
    transition: all 0.3s ease; border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
  }
  .navbar-nav.active, .navbar-nav.open {
    transform: translateY(0); opacity: 1; pointer-events: auto;
  }
  .navbar-nav .nav-link { width: 100%; padding: 11px 16px; }
}

/* ===== Hero — 实验室风格 ===== */
.hero-lab {
  padding: 120px 0 64px;
  background: linear-gradient(165deg, #EEF2FF 0%, #F5F3FF 50%, #FAFAFE 100%);
  text-align: center; position: relative; overflow: hidden;
}
.hero-lab::before {
  content: '';
  position: absolute; top: -30%; right: -10%;
  width: 500px; height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79,70,229,0.08) 0%, transparent 70%);
}
.hero-lab::after {
  content: '';
  position: absolute; bottom: -20%; left: -10%;
  width: 400px; height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124,58,237,0.06) 0%, transparent 70%);
}

.lab-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 16px; border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: #fff; font-size: 13px; font-weight: 600;
  letter-spacing: 0.5px; margin-bottom: 20px;
}

.hero-lab h1 { font-size: clamp(32px, 5vw, 48px); line-height: 1.2; margin-bottom: 18px; position: relative; }
.gradient-text {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle { font-size: 17px; color: var(--text-secondary); max-width: 600px; margin: 0 auto 30px; line-height: 1.8; position: relative; }
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; position: relative; margin-bottom: 36px; }

.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 28px; border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: #fff; font-size: 15px; font-weight: 600;
  box-shadow: var(--shadow-purple);
  transition: all var(--transition);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(79,70,229,0.3); color: #fff; }
.btn-secondary {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 13px 24px; border-radius: var(--radius-lg);
  background: var(--bg-card); color: var(--text-secondary); font-size: 14px; font-weight: 500;
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.btn-secondary:hover { border-color: var(--primary); color: var(--primary); }

.hero-stats {
  display: flex; gap: 32px; justify-content: center; flex-wrap: wrap;
  position: relative;
}
.hero-stat { text-align: center; }
.hero-stat .num { font-size: 26px; font-weight: 800; color: var(--primary); }
.hero-stat .label { font-size: 13px; color: var(--text-muted); margin-top: 2px; }

/* ===== Section 通用 ===== */
.section-header { text-align: center; max-width: 600px; margin: 0 auto 44px; }
.section-tag {
  display: inline-block; padding: 4px 14px; border-radius: var(--radius-full);
  background: var(--primary-lighter); color: var(--primary);
  font-size: 13px; font-weight: 600; margin-bottom: 12px;
}
.section-header h2 { font-size: clamp(24px, 3.5vw, 32px); margin-bottom: 12px; color: var(--text-primary); }
.section-header p { color: var(--text-secondary); font-size: 15px; }

section { padding: 72px 0; }
section:nth-child(even) { background: var(--bg-secondary); }

/* ===== 状态标签系统（实验室核心组件）===== */
.status-badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 10px; border-radius: var(--radius-full);
  font-size: 12px; font-weight: 600; letter-spacing: 0.3px;
}
.status-badge::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
}
.status-stable { background: var(--success-bg); color: var(--success-text); }
.status-stable::before { background: var(--stable-color); }
.status-beta { background: var(--warning-bg); color: var(--warning-text); }
.status-beta::before { background: var(--beta-color); }
.status-experimental {
  background: #F3E8FF; color: #6B21A8;
}
.status-experimental::before { background: var(--experimental-color); }
.status-idea { background: var(--bg-tertiary); color: var(--text-muted); }
.status-idea::before { background: var(--idea-color); }

/* ===== 三段式区域：现在 / 计划 / 未来 ===== */
.timeline-section { position: relative; }
.timeline-section::before {
  content: '';
  position: absolute; left: 50%; top: 0; bottom: 0;
  width: 2px; background: linear-gradient(to bottom, var(--primary), var(--secondary), var(--border));
  transform: translateX(-50%);
}
@media (max-width: 768px) {
  .timeline-section::before { left: 24px; }
}

.phase-block { margin-bottom: 56px; }
.phase-label {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 20px; border-radius: var(--radius-full);
  font-size: 14px; font-weight: 700; margin-bottom: 24px;
}
.phase-now { background: var(--primary-lighter); color: var(--primary-dark); }
.phase-plan { background: #FEF3C7; color: #92400E; }
.phase-future { background: #FCE7F3; color: #9D174D; }

.feature-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; }
.feat-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 24px;
  transition: all var(--transition);
}
.feat-card:hover { border-color: var(--primary-light); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.feat-card .feat-icon {
  width: 46px; height: 46px; border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; margin-bottom: 14px;
}
.feat-card h3 { font-size: 17px; margin-bottom: 8px; }
.feat-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }
.feat-meta { display: flex; align-items: center; gap: 8px; margin-top: 14px; }

/* ===== 项目卡片（测试项目用）===== */
.project-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 20px; }
.proj-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 24px;
  border-left: 4px solid var(--experimental-color);
  transition: all var(--transition);
}
.proj-card:hover { box-shadow: var(--shadow-md); }
.proj-card h3 { font-size: 17px; margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }
.proj-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 12px; }
.proj-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 14px; }
.progress-bar {
  height: 6px; background: var(--bg-tertiary); border-radius: var(--radius-full); overflow: hidden;
}
.progress-bar .fill {
  height: 100%; border-radius: var(--radius-full);
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transition: width 0.6s ease;
}

/* ===== 未来畅想卡片 ===== */
.vision-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }
.vision-card {
  background: linear-gradient(135deg, #FAF5FF, #F5F3FF);
  border: 1px solid #EDE9FE;
  border-radius: var(--radius-lg); padding: 28px;
  text-align: center; transition: all var(--transition);
}
.vision-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.vision-icon { font-size: 40px; margin-bottom: 14px; }
.vision-card h3 { font-size: 17px; margin-bottom: 10px; color: var(--secondary-dark); }
.vision-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }
.vision-time { font-size: 12px; color: var(--text-muted); margin-top: 14px; }

/* ===== 下载页样式 ===== */
.download-hero { padding: 100px 0 56px; background: linear-gradient(165deg, #EEF2FF, #F5F3FF); text-align: center; }
.download-hero h1 { font-size: clamp(28px, 4vw, 40px); margin-bottom: 14px; }
.download-hero > .container > p { color: var(--text-secondary); max-width: 550px; margin: 0 auto 28px; font-size: 15px; }

.channel-tabs {
  display: flex; justify-content: center; gap: 8px; margin-bottom: 36px; flex-wrap: wrap;
}
.channel-tab {
  padding: 10px 24px; border-radius: var(--radius-full);
  font-size: 14px; font-weight: 600; cursor: pointer;
  border: 2px solid var(--border); background: var(--bg-card);
  color: var(--text-secondary); transition: all var(--transition);
}
.channel-tab.active {
  border-color: var(--primary); background: var(--primary); color: #fff;
}
.channel-tab:hover:not(.active) { border-color: var(--primary-light); color: var(--primary); }

.platform-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }
.pf-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 24px; text-align: center;
  transition: all var(--transition);
}
.pf-card:hover { border-color: var(--primary-light); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.pf-icon { font-size: 36px; margin-bottom: 10px; }
.pf-card h3 { font-size: 17px; margin-bottom: 6px; }
.pf-card p { font-size: 13px; color: var(--text-muted); margin-bottom: 14px; }
.pf-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 20px; border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: #fff; font-size: 13px; font-weight: 600;
  transition: all var(--transition);
}
.pf-btn:hover { transform: scale(1.05); color: #fff; box-shadow: var(--shadow-purple); }

/* ===== 版本对比表 ===== */
.version-table-wrap { overflow-x: auto; margin-top: 32px; }
.version-table {
  width: 100%; border-collapse: collapse; background: var(--bg-card);
  border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.version-table th {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: #fff; padding: 14px 18px; font-size: 13px; font-weight: 600; text-align: left;
}
.version-table td {
  padding: 14px 18px; font-size: 14px; border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary);
}
.version-table tr:last-child td { border-bottom: none; }
.version-table tr:hover td { background: var(--bg-secondary); }
.version-table .highlight { color: var(--primary); font-weight: 600; }

/* ===== 功能详情网格 ===== */
.detail-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 24px; }
.detail-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); overflow: hidden;
}
.detail-card .detail-head {
  padding: 20px 24px; border-bottom: 1px solid var(--border-light);
  display: flex; align-items: center; gap: 12px;
}
.detail-card .detail-head .d-icon {
  width: 40px; height: 40px; border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center; font-size: 20px;
}
.detail-card .detail-body { padding: 20px 24px; }
.detail-body ul li {
  padding: 6px 0; font-size: 14px; color: var(--text-secondary);
  display: flex; align-items: flex-start; gap: 8px;
}
.detail-body ul li::before { content: '✓'; color: var(--success); font-weight: bold; flex-shrink: 0; margin-top: 2px; }

/* ===== 时间线（路线图）===== */
.roadmap { position: relative; padding: 20px 0; }
.roadmap::before {
  content: ''; position: absolute; left: 28px; top: 0; bottom: 0;
  width: 2px; background: var(--border);
}
.r-item {
  display: flex; gap: 20px; margin-bottom: 28px; position: relative;
}
.r-dot {
  width: 18px; height: 18px; border-radius: 50%;
  border: 3px solid var(--primary); background: var(--bg);
  flex-shrink: 0; margin-top: 4px; z-index: 1;
}
.r-dot.done { background: var(--success); border-color: var(--success); }
.r-dot.current { background: var(--primary); border-color: var(--primary); box-shadow: 0 0 0 4px var(--primary-lighter); }
.r-dot.future { background: var(--bg); border-color: var(--border); }
.r-content h4 { font-size: 15px; margin-bottom: 4px; }
.r-content p { font-size: 13px; color: var(--text-muted); line-height: 1.6; }
.r-date { font-size: 12px; color: var(--primary); font-weight: 600; margin-bottom: 4px; }

/* ===== FAQ ===== */
.faq-list { max-width: 720px; margin: 0 auto; }
.faq-item {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); margin-bottom: 10px;
  overflow: hidden; transition: all var(--transition);
}
.faq-item.active { border-color: var(--primary-light); box-shadow: var(--shadow-sm); }
.faq-question {
  width: 100%; padding: 16px 20px; display: flex; align-items: center; justify-content: space-between;
  background: none; border: none; cursor: pointer;
  font-size: 15px; font-weight: 600; color: var(--text-primary);
  text-align: left;
}
.faq-q-icon {
  font-size: 18px; transition: transform var(--transition); flex-shrink: 0;
  color: var(--primary);
}
.faq-item.active .faq-q-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0; overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
}
.faq-answer-inner { padding: 0 20px 16px; font-size: 14px; color: var(--text-secondary); line-height: 1.8; }
.faq-item.active .faq-answer { max-height: 300px; }

/* ===== Footer ===== */
.footer {
  background: var(--secondary-dark); color: #E0E7FF; padding: 48px 0 24px;
  margin-top: auto;
}
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 32px; margin-bottom: 36px; }
.footer-col h4 { font-size: 15px; font-weight: 700; margin-bottom: 16px; color: #fff; }
.footer-col a { display: block; color: #C7D2FE; font-size: 13px; padding: 4px 0; }
.footer-col a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 20px; text-align: center;
  font-size: 13px; color: #A5B4FC;
}

/* ===== 回到顶部 ===== */
.back-to-top {
  position: fixed; bottom: 28px; right: 28px;
  width: 42px; height: 42px; border-radius: 50%;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-size: 18px; cursor: pointer;
  border: none; box-shadow: var(--shadow-purple);
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: all var(--transition); z-index: 999;
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-3px); }

/* ===== 动画 ===== */
.reveal { opacity: 0; transform: translateY(20px); transition: all 0.55s ease; }
.reveal.visible, .reveal.active { opacity: 1; transform: translateY(0); }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  section { padding: 52px 0; }
  .hero-lab { padding: 100px 0 48px; }
  .hero-stats { gap: 20px; }
  .feature-grid { grid-template-columns: 1fr; }
  .project-grid { grid-template-columns: 1fr; }
  .vision-grid { grid-template-columns: 1fr; }
  .detail-grid { grid-template-columns: 1fr; }
  .platform-cards { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .download-hero { padding: 90px 0 42px; }
}
@media (max-width: 480px) {
  .platform-cards { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}