/* ============================================================
   地牯牛 AI 教育平台 · 产品站（独立维护版）
   本文件由原型 src/pages/front/product/index.astro 剥离生成。
   主题变量 :root 取自原型 src/styles/global.css（shadcn HSL 体系），
   便于与原型设计语言保持一致；如需独立调整，直接改这里。
   ============================================================ */

:root {
/* --- Shadcn HSL Color System --- */
    --background: 45 12% 95%;
    --foreground: 0 0% 10%;
    --card: 0 0% 100%;
    --card-foreground: 0 0% 10%;
    --popover: 0 0% 100%;
    --popover-foreground: 0 0% 10%;
    --primary: 252 75% 63%;
    --primary-foreground: 0 0% 100%;
    --secondary: 45 12% 92%;
    --secondary-foreground: 0 0% 10%;
    --muted: 45 12% 92%;
    --muted-foreground: 0 0% 60%;
    --accent: 45 12% 92%;
    --accent-foreground: 0 0% 10%;
    --destructive: 0 72% 51%;
    --destructive-foreground: 0 0% 100%;
    --border: 43 10% 91%;
    --input: 43 10% 91%;
    --ring: 252 75% 63%;
    --radius: 0.625rem;

    /* --- Sidebar tokens --- */
    --sidebar-background: 0 0% 100%;
    --sidebar-foreground: 0 0% 10%;
    --sidebar-primary: 252 75% 63%;
    --sidebar-primary-foreground: 0 0% 100%;
    --sidebar-accent: 45 12% 92%;
    --sidebar-accent-foreground: 0 0% 10%;
    --sidebar-border: 43 10% 91%;
    --sidebar-ring: 252 75% 63%;

    /* --- Extended palette (shadcn chart colors) --- */
    --chart-1: 252 75% 63%;
    --chart-2: 160 84% 39%;
    --chart-3: 39 100% 60%;
    --chart-4: 210 100% 66%;
    --chart-5: 0 72% 51%;

    /* --- Legacy compatibility --- */
    --color-bg:           hsl(var(--background));
    --color-bg-card:      hsl(var(--card));
    --color-bg-sidebar:   hsl(var(--sidebar-background));
    --color-bg-hover:     hsl(45 12% 93%);
    --color-bg-active:     hsl(45 12% 90%);
    --color-bg-chat:       hsl(45 12% 96%);
    --color-bg-secondary: hsl(45 12% 95%);
    --color-bg-primary:   hsl(0 0% 100%);

    --color-text:         hsl(var(--foreground));
    --color-text-title:   hsl(0 0% 5%);
    --color-text-secondary: hsl(0 0% 36%);
    --color-text-muted:    hsl(var(--muted-foreground));
    --color-text-placeholder: hsl(0 0% 75%);

    --color-primary:      hsl(var(--primary));
    --color-primary-light: hsl(255 100% 83%);
    --color-primary-soft: hsla(var(--primary) / 0.06);
    --color-primary-gradient: linear-gradient(135deg, hsl(var(--primary)), hsl(var(--primary-foreground)));
    --color-primary-dark:  hsl(252 60% 50%);

    --color-success:      hsl(160 84% 39%);
    --color-success-soft: hsla(160 84% 39% / 0.08);
    --color-danger:       hsl(var(--destructive));
    --color-danger-soft:  hsla(var(--destructive) / 0.08);
    --color-warning:      hsl(39 100% 60%);
    --color-warning-soft: hsla(39 100% 60% / 0.12);
    --color-info:         hsl(210 100% 66%);
    --color-info-soft:    hsla(210 100% 66% / 0.08);

    --color-bubble-user:  hsl(0 0% 18%);
    --color-bubble-user-text: hsl(0 0% 100%);
    --color-bubble-ai:     hsl(var(--card));
    --color-bubble-ai-text: hsl(var(--card-foreground));
    --color-bubble-ai-border: hsl(var(--border));

    --color-border:       hsl(var(--border));
    --color-divider:      hsl(45 10% 91%);
    --color-sidebar-border: hsl(46 12% 89%);

    --shadow-none:        0 0 0 transparent;
    --shadow-xs:          0 1px 2px hsl(0 0% 0% / 0.03);
    --shadow-sm:          0 1px 3px hsl(0 0% 0% / 0.04);
    --shadow-md:          0 4px 16px hsl(0 0% 0% / 0.05);
    --shadow-lg:          0 12px 32px hsl(0 0% 0% / 0.06);
    --shadow-card:        0 1px 4px hsl(0 0% 0% / 0.04), 0 2px 12px hsl(0 0% 0% / 0.03);
    --shadow-bubble-user: 0 2px 8px hsl(0 0% 0% / 0.08);
    --shadow-bubble-ai:   0 1px 3px hsl(0 0% 0% / 0.04);

    --radius-xs:    6px;
    --radius-sm:    10px;
    --radius-md:    14px;
    --radius-lg:    18px;
    --radius-xl:    22px;
    --radius-2xl:   28px;
    --radius-bubble: 22px;
    --radius-full:  9999px;

    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Noto Sans SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;

    --sidebar-width: 72px;
    --topbar-height: 0px;

    --transition:     all 0.15s ease;
    --transition-slow: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== 基础重置（原型 public/styles/global.css 片段） ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; text-rendering: optimizeLegibility; }
body { font-family: var(--font-family); }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }

/* ===== 页面样式（原 product/index.astro 的 <style>） ===== */
/* ===== CSS 动画关键帧 ===== */
    @keyframes float {
      0%, 100% { transform: translateY(0px); }
      50% { transform: translateY(-12px); }
    }
    @keyframes float-slow {
      0%, 100% { transform: translateY(0px) rotate(0deg); }
      33% { transform: translateY(-8px) rotate(1deg); }
      66% { transform: translateY(4px) rotate(-1deg); }
    }
    @keyframes shimmer {
      0% { background-position: -200% 0; }
      100% { background-position: 200% 0; }
    }
    @keyframes fadeInUp {
      from { opacity: 0; transform: translateY(30px); }
      to   { opacity: 1; transform: translateY(0); }
    }
    @keyframes scaleIn {
      from { opacity: 0; transform: scale(0.92); }
      to   { opacity: 1; transform: scale(1); }
    }
    @keyframes gradientShift {
      0% { background-position: 0% 50%; }
      50% { background-position: 100% 50%; }
      100% { background-position: 0% 50%; }
    }

    /* ===== 基础变量与重置 ===== */
    .landing-body {
      font-family: var(--font-family);
      color: hsl(var(--foreground));
      background: #FAFBFC;
      line-height: 1.6;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 28px;
    }
    .container.narrow { max-width: 800px; }
    .text-center { text-align: center; }

    .section {
      padding: 80px 0;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      justify-content: center;
      position: relative;
    }
    .section-light {
      background: linear-gradient(180deg, #F8F9FB 0%, #F1F3F6 100%);
    }

    .section-eyebrow { display: none; }

    .section-title {
      font-size: 42px;
      font-weight: 800;
      color: #1a1a2e;
      line-height: 1.15;
      margin-bottom: 18px;
      letter-spacing: -1.5px;
    }

    /* ===== 右侧浮动章节导航 ===== */
    .section-nav {
      position: fixed;
      right: 24px;
      top: 50%;
      transform: translateY(-50%);
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 6px;
      background: rgba(255,255,255,0.85);
      backdrop-filter: blur(16px) saturate(180%);
      -webkit-backdrop-filter: blur(16px) saturate(180%);
      border: 1px solid rgba(0,0,0,0.06);
      border-radius: 12px;
      padding: 10px 8px;
      box-shadow: 0 2px 12px rgba(0,0,0,0.04), 0 8px 32px rgba(0,0,0,0.06);
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.35s ease;
    }
    .section-nav-item {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 6px 12px;
      border-radius: 8px;
      font-size: 12px;
      font-weight: 500;
      color: #94a3b8;
      white-space: nowrap;
      transition: all 0.25s ease;
      text-decoration: none;
      position: relative;
    }
    .section-nav-item::before {
      content: '';
      width: 4px;
      height: 4px;
      border-radius: 50%;
      background: #cbd5e1;
      flex-shrink: 0;
      transition: all 0.3s ease;
    }
    .section-nav-item:hover {
      color: #6C5CE7;
      background: rgba(108,92,231,0.06);
    }
    .section-nav-item:hover::before {
      background: #a78bfa;
    }
    .section-nav-item.active {
      color: #6C5CE7;
      font-weight: 600;
      background: rgba(108,92,231,0.08);
    }
    .section-nav-item.active::before {
      width: 6px;
      height: 6px;
      background: #6C5CE7;
      box-shadow: 0 0 6px rgba(108,92,231,0.4);
    }

    .section-desc {
      font-size: 17px;
      color: #5a6a7e;
      max-width: 640px;
      margin: 0 auto;
      line-height: 1.75;
      font-weight: 400;
    }

    .section-title-left {
      font-size: 42px;
      font-weight: 800;
      line-height: 1.15;
      margin-bottom: 20px;
      letter-spacing: -1.5px;
      color: #1a1a2e;
    }

    .section-desc-left {
      font-size: 17px;
      color: #5a6a7e;
      line-height: 1.75;
      margin-bottom: 26px;
    }

    .text-gradient {
      background: linear-gradient(135deg, #6C5CE7 0%, #a855f7 40%, #6366f1 100%);
      background-size: 200% 200%;
      animation: gradientShift 4s ease infinite;
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    /* ===== 按钮 ===== */
    .btn-text {
      font-size: 14px;
      font-weight: 500;
      color: #3a3a5c;
      padding: 8px 14px;
      border-radius: 8px;
      transition: all 0.25s ease;
    }
    .btn-text:hover { color: hsl(var(--primary)); background: hsl(var(--primary) / 0.05); }

    .btn-primary-sm {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 10px 20px;
      font-size: 14px;
      font-weight: 600;
      color: #fff;
      background: linear-gradient(135deg, #6C5CE7, #7c6cf0);
      border-radius: 12px;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      box-shadow: 0 4px 16px rgba(108,92,231,0.25), 0 1px 3px rgba(108,92,231,0.1);
      position: relative;
      overflow: hidden;
    }
    .btn-primary-sm::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, transparent 0%, rgba(255,255,255,0.15) 50%, transparent 100%);
      background-size: 200% 100%;
      animation: shimmer 3s infinite;
      pointer-events: none;
    }
    .btn-primary-sm:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(108,92,231,0.35), 0 2px 6px rgba(108,92,231,0.15);
    }

    .btn-primary-lg {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      padding: 15px 32px;
      font-size: 16px;
      font-weight: 600;
      color: #fff;
      background: linear-gradient(135deg, #6C5CE7, #7c6cf0);
      border-radius: 14px;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      box-shadow: 0 6px 24px rgba(108,92,231,0.3), 0 2px 6px rgba(108,92,231,0.1);
      position: relative;
      overflow: hidden;
    }
    .btn-primary-lg::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, transparent 0%, rgba(255,255,255,0.12) 50%, transparent 100%);
      background-size: 200% 100%;
      animation: shimmer 3s infinite;
      pointer-events: none;
    }
    .btn-primary-lg:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 32px rgba(108,92,231,0.4), 0 4px 10px rgba(108,92,231,0.15);
    }

    .btn-secondary-lg {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      padding: 15px 32px;
      font-size: 16px;
      font-weight: 600;
      color: #3a3a5c;
      background: #fff;
      border: 1.5px solid #e2e8f0;
      border-radius: 14px;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      box-shadow: 0 1px 3px rgba(0,0,0,0.04);
    }
    .btn-secondary-lg:hover {
      background: #f8f9fb;
      border-color: #cbd5e1;
      box-shadow: 0 4px 16px rgba(0,0,0,0.06);
      transform: translateY(-2px);
    }

    /* ===== 导航 ===== */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 100;
      height: 72px;
      display: flex;
      align-items: center;
      background: rgba(255,255,255,0.9);
      backdrop-filter: blur(20px) saturate(180%);
      -webkit-backdrop-filter: blur(20px) saturate(180%);
      border-bottom: 1px solid rgba(0,0,0,0.06);
      transition: box-shadow 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .site-header.scrolled {
      box-shadow: 0 1px 3px rgba(0,0,0,0.03), 0 8px 24px rgba(0,0,0,0.04);
    }
    .header-inner {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 28px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 18px;
      font-weight: 700;
      color: #1a1a2e;
      transition: opacity 0.2s;
    }
    .brand:hover { opacity: 0.8; }
    .brand img { border-radius: 0; box-shadow: none; height: 50px; width: auto; }
    .header-nav {
      display: flex;
      align-items: center;
      gap: 36px;
    }
    .header-nav a {
      font-size: 14px;
      font-weight: 500;
      color: #5a6a7e;
      transition: all 0.25s ease;
      position: relative;
      padding: 4px 0;
    }
    .header-nav a::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      right: 0;
      height: 2px;
      background: linear-gradient(90deg, #6C5CE7, #a855f7);
      border-radius: 2px;
      transform: scaleX(0);
      transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .header-nav a:hover { color: #1a1a2e; }
    .header-nav a:hover::after { transform: scaleX(1); }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .mobile-menu-toggle {
      display: none;
      width: 32px;
      height: 32px;
      flex-direction: column;
      justify-content: center;
      gap: 5px;
      padding: 4px;
      background: none;
      border: none;
    }
    .mobile-menu-toggle span {
      display: block;
      width: 22px;
      height: 2px;
      background: #1a1a2e;
      border-radius: 2px;
    }
    .mobile-menu {
      display: none;
      position: fixed;
      top: 72px;
      left: 0;
      right: 0;
      background: rgba(255,255,255,0.95);
      backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(0,0,0,0.06);
      padding: 16px 24px;
      z-index: 99;
      box-shadow: 0 16px 32px rgba(0,0,0,0.08);
    }
    .mobile-menu nav {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .mobile-menu a {
      padding: 10px 0;
      font-size: 15px;
      font-weight: 500;
      color: #1a1a2e;
      border-bottom: 1px solid rgba(0,0,0,0.06);
    }
    .mobile-menu a:last-child { border-bottom: none; }

    /* ===== Hero ===== */
    .hero-section {
      position: relative;
      padding: 140px 0 110px;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      justify-content: center;
      overflow: hidden;
      background: linear-gradient(180deg, #fafbfd 0%, #f4f6fa 50%, #eef1f7 100%);
    }
    .hero-section::before {
      content: '';
      position: absolute;
      top: -50%;
      left: -30%;
      width: 160%;
      height: 200%;
      background:
        radial-gradient(ellipse at 70% 20%, rgba(108,92,231,0.12) 0%, transparent 50%),
        radial-gradient(ellipse at 30% 80%, rgba(168,85,247,0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 60% 60%, rgba(99,102,241,0.06) 0%, transparent 40%);
      pointer-events: none;
    }
    .hero-bg {
      position: absolute;
      inset: 0;
      pointer-events: none;
      z-index: 0;
    }
    .hero-orb {
      position: absolute;
      border-radius: 50%;
      filter: blur(120px);
      opacity: 0.5;
    }
    .hero-orb-1 {
      width: 700px;
      height: 700px;
      background: linear-gradient(135deg, rgba(108,92,231,0.25), rgba(168,85,247,0.15));
      top: -220px;
      right: -150px;
      animation: float-slow 8s ease-in-out infinite;
    }
    .hero-orb-2 {
      width: 550px;
      height: 550px;
      background: linear-gradient(135deg, rgba(99,102,241,0.2), rgba(108,92,231,0.1));
      bottom: -150px;
      left: -120px;
      animation: float-slow 10s ease-in-out infinite reverse;
    }
    .hero-grid {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 72px;
      align-items: center;
    }
    .hero-content {
      max-width: 580px;
      animation: fadeInUp 0.8s cubic-bezier(0.22, 0.61, 0.36, 1);
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 16px;
      background: rgba(108,92,231,0.08);
      border: 1px solid rgba(108,92,231,0.15);
      border-radius: var(--radius-full);
      font-size: 13px;
      font-weight: 600;
      color: #6C5CE7;
      margin-bottom: 24px;
      backdrop-filter: blur(4px);
    }
    .badge-dot {
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: #6C5CE7;
      box-shadow: 0 0 8px rgba(108,92,231,0.5);
      animation: pulse-dot 2s infinite;
    }
    @keyframes pulse-dot {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.5; transform: scale(1.5); }
    }
    .hero-title {
      font-size: 60px;
      font-weight: 850;
      line-height: 1.08;
      letter-spacing: -2.5px;
      margin-bottom: 24px;
      color: #0f0f23;
    }
    .hero-subtitle {
      font-size: 18px;
      color: #5a6a7e;
      line-height: 1.8;
      margin-bottom: 36px;
      font-weight: 400;
    }
    .hero-actions {
      display: flex;
      align-items: center;
      gap: 16px;
      margin-bottom: 44px;
    }
    .hero-trust {
      display: flex;
      align-items: center;
      gap: 16px;
      font-size: 14px;
      color: #5a6a7e;
      padding: 12px 18px;
      background: rgba(255,255,255,0.7);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(0,0,0,0.05);
      border-radius: 14px;
      display: inline-flex;
    }
    .hero-trust strong {
      color: #1a1a2e;
      font-weight: 700;
    }
    .avatar-stack {
      display: flex;
    }
    .avatar-stack .avatar {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: linear-gradient(135deg, #6C5CE7, #a855f7);
      color: white;
      font-size: 12px;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      border: 2.5px solid #fff;
      margin-left: -12px;
      box-shadow: 0 2px 8px rgba(108,92,231,0.2);
    }
    .avatar-stack .avatar:first-child { margin-left: 0; }

    /* ===== Mockup ===== */
    .hero-visual {
      display: flex;
      justify-content: center;
      align-items: center;
      animation: scaleIn 0.8s cubic-bezier(0.22, 0.61, 0.36, 1) 0.2s both;
    }
    .mockup-window {
      width: 100%;
      max-width: 520px;
      background: #fff;
      border-radius: 20px;
      border: 1px solid rgba(0,0,0,0.06);
      box-shadow:
        0 32px 80px rgba(0,0,0,0.1),
        0 12px 32px rgba(0,0,0,0.06),
        0 0 0 1px rgba(0,0,0,0.02);
      overflow: hidden;
      animation: float 6s ease-in-out infinite;
    }
    .mockup-window.mockup-dark {
      background: #13141f;
      border-color: rgba(255,255,255,0.06);
      box-shadow:
        0 32px 64px rgba(0,0,0,0.3),
        0 8px 20px rgba(0,0,0,0.15);
    }
    .mockup-header {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 14px 18px;
      background: #f8f9fb;
      border-bottom: 1px solid rgba(0,0,0,0.05);
    }
    .mockup-dark .mockup-header {
      background: rgba(255,255,255,0.03);
      border-bottom-color: rgba(255,255,255,0.06);
    }
    .mockup-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
    }
    .mockup-dot.red    { background: #ff5f57; box-shadow: 0 0 4px rgba(255,95,87,0.4); }
    .mockup-dot.yellow { background: #febc2e; box-shadow: 0 0 4px rgba(254,188,46,0.4); }
    .mockup-dot.green  { background: #28c840; box-shadow: 0 0 4px rgba(40,200,64,0.4); }
    .mockup-title {
      margin-left: auto;
      font-size: 12px;
      color: #94a3b8;
      font-weight: 500;
    }
    .mockup-dark .mockup-title { color: rgba(255,255,255,0.4); }
    .mockup-body {
      padding: 24px;
      display: flex;
      flex-direction: column;
      gap: 18px;
      min-height: 360px;
    }
    .mockup-message {
      display: flex;
      gap: 12px;
      max-width: 90%;
    }
    .mockup-message.user {
      align-self: flex-end;
      flex-direction: row-reverse;
    }
    .mockup-avatar {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: linear-gradient(135deg, #6C5CE7, #a855f7);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      flex-shrink: 0;
      box-shadow: 0 2px 8px rgba(108,92,231,0.25);
    }
    .mockup-bubble {
      padding: 14px 18px;
      border-radius: 18px 18px 18px 6px;
      font-size: 14px;
      line-height: 1.65;
      background: #f4f5f8;
      color: #2d2d3f;
      border: 1px solid rgba(0,0,0,0.04);
    }
    .mockup-message.user .mockup-bubble {
      border-radius: 18px 18px 6px 18px;
      background: linear-gradient(135deg, #6C5CE7, #7c6cf0);
      color: #fff;
      border-color: transparent;
      box-shadow: 0 4px 16px rgba(108,92,231,0.25);
    }
    .mockup-dark .mockup-bubble {
      background: rgba(255,255,255,0.06);
      color: rgba(255,255,255,0.88);
      border-color: rgba(255,255,255,0.06);
    }
    .mockup-dark .mockup-message.user .mockup-bubble {
      background: linear-gradient(135deg, #6C5CE7, #7c6cf0);
      color: #fff;
      box-shadow: 0 4px 16px rgba(108,92,231,0.3);
    }
    .mockup-task-list {
      margin-top: 10px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .mockup-task {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: #64748b;
    }
    .mockup-task.done   { color: #10b981; }
    .mockup-task.active { color: #6C5CE7; }
    .task-icon {
      width: 20px;
      height: 20px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 10px;
      font-weight: 700;
      background: rgba(0,0,0,0.04);
    }
    .mockup-task.done .task-icon   { background: rgba(16,185,129,0.12); }
    .mockup-task.active .task-icon { background: rgba(108,92,231,0.12); }
    .mockup-input {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 16px;
      background: #f8f9fb;
      border: 1.5px solid rgba(0,0,0,0.06);
      border-radius: var(--radius-full);
      font-size: 14px;
      color: #94a3b8;
      transition: border-color 0.2s;
    }
    .mockup-input:focus-within { border-color: rgba(108,92,231,0.3); }
    .mockup-dark .mockup-input {
      background: rgba(255,255,255,0.03);
      border-color: rgba(255,255,255,0.06);
    }
    .mockup-send {
      width: 34px;
      height: 34px;
      border-radius: 50%;
      background: linear-gradient(135deg, #6C5CE7, #7c6cf0);
      color: white;
      display: flex;
      align-items: center;
      justify-content: center;
      border: none;
      cursor: pointer;
      box-shadow: 0 2px 8px rgba(108,92,231,0.3);
    }
    .mockup-pills {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
      margin-bottom: 4px;
    }
    .pill {
      padding: 6px 14px;
      border-radius: var(--radius-full);
      font-size: 12px;
      font-weight: 500;
      color: rgba(255,255,255,0.5);
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.06);
      transition: all 0.2s;
    }
    .pill.active {
      background: rgba(108,92,231,0.2);
      color: #a78bfa;
      border-color: rgba(108,92,231,0.3);
    }
    .mockup-files {
      display: flex;
      flex-direction: column;
      gap: 8px;
      margin-top: 10px;
    }
    .mockup-file {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 10px 12px;
      background: rgba(255,255,255,0.04);
      border: 1px solid rgba(255,255,255,0.04);
      border-radius: 10px;
      font-size: 13px;
      transition: background 0.2s;
    }
    .mockup-file:hover { background: rgba(255,255,255,0.08); }
    .workflow-item {
      display: grid;
      grid-template-columns: 28px 1fr;
      gap: 12px;
      align-items: center;
      padding: 14px 16px;
      background: rgba(255,255,255,0.03);
      border: 1px solid rgba(255,255,255,0.05);
      border-radius: 14px;
      transition: all 0.25s ease;
    }
    .workflow-item:hover {
      background: rgba(255,255,255,0.06);
      border-color: rgba(108,92,231,0.2);
    }
    .workflow-num {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: linear-gradient(135deg, #6C5CE7, #a855f7);
      color: white;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 13px;
      font-weight: 700;
    }
    .workflow-text {
      font-size: 14px;
      color: rgba(255,255,255,0.85);
      grid-column: 2;
      font-weight: 500;
    }
    .workflow-bar {
      height: 4px;
      background: rgba(255,255,255,0.06);
      border-radius: 2px;
      overflow: hidden;
      grid-column: 2;
    }
    .workflow-bar span {
      display: block;
      height: 100%;
      background: linear-gradient(90deg, #6C5CE7, #a855f7);
      border-radius: 2px;
      transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
    }

    /* ===== 我的模型画像卡片 ===== */
    .mymodel-profile {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .mymodel-user {
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 14px 16px;
      background: #f8f9fb;
      border-radius: 14px;
      border: 1px solid rgba(0,0,0,0.04);
    }
    .mymodel-avatar {
      width: 46px;
      height: 46px;
      border-radius: 14px;
      background: linear-gradient(135deg, rgba(108,92,231,0.12), rgba(168,85,247,0.08));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      flex-shrink: 0;
    }
    .mymodel-user-info {
      flex: 1;
      min-width: 0;
    }
    .mymodel-user-name {
      font-size: 14px;
      font-weight: 700;
      color: #1a1a2e;
      margin-bottom: 6px;
    }
    .mymodel-completeness {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .mymodel-complete-bar {
      flex: 1;
      height: 6px;
      background: rgba(0,0,0,0.06);
      border-radius: 3px;
      overflow: hidden;
    }
    .mymodel-complete-fill {
      display: block;
      height: 100%;
      background: linear-gradient(90deg, #6C5CE7, #a855f7);
      border-radius: 3px;
    }
    .mymodel-complete-text {
      font-size: 11px;
      color: #94a3b8;
      font-weight: 600;
      white-space: nowrap;
    }
    /* 维度卡片 */
    .mymodel-dimensions {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .mymodel-dim {
      padding: 12px 14px;
      background: rgba(108,92,231,0.025);
      border: 1px solid rgba(108,92,231,0.06);
      border-radius: 12px;
    }
    .mymodel-dim-header {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 10px;
    }
    .mymodel-dim-icon {
      font-size: 15px;
    }
    .mymodel-dim-name {
      font-size: 13px;
      font-weight: 700;
      color: #1a1a2e;
      flex: 1;
    }
    .mymodel-dim-badge {
      font-size: 10px;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: 6px;
      white-space: nowrap;
    }
    .mymodel-dim-badge.filled {
      color: #10b981;
      background: rgba(16,185,129,0.1);
    }
    .mymodel-dim-badge.empty {
      color: #f59e0b;
      background: rgba(245,158,11,0.1);
    }
    .mymodel-dim-fields {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    /* 字段条目 */
    .mymodel-field {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 6px 10px;
      border-radius: 8px;
      font-size: 12px;
    }
    .mymodel-field.verified {
      background: rgba(16,185,129,0.06);
    }
    .mymodel-field.pending {
      background: rgba(245,158,11,0.05);
    }
    .mymodel-field-label {
      font-weight: 600;
      color: #64748b;
      flex-shrink: 0;
      min-width: 56px;
    }
    .mymodel-field-val {
      color: #3a3a5c;
      flex: 1;
    }
    .mymodel-field-status {
      color: #f59e0b;
      font-style: italic;
      font-size: 11px;
    }
    /* 图例 */
    .mymodel-memory-legend {
      display: flex;
      gap: 20px;
      justify-content: center;
      padding-top: 4px;
    }
    .mymodel-legend-item {
      display: flex;
      align-items: center;
      gap: 6px;
      font-size: 11px;
      color: #94a3b8;
      font-weight: 500;
    }
    .mymodel-dot-icon {
      width: 8px;
      height: 8px;
      border-radius: 50%;
    }
    .mymodel-dot-icon.verified-dot {
      background: #10b981;
    }
    .mymodel-dot-icon.pending-dot {
      background: #f59e0b;
    }

    /* ===== Feature Cards ===== */
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-top: 48px;
    }
    .feature-card {
      background: #fff;
      border: 1px solid rgba(0,0,0,0.05);
      border-radius: 20px;
      padding: 36px 28px;
      transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
      box-shadow: 0 1px 3px rgba(0,0,0,0.03);
      position: relative;
      overflow: hidden;
    }
    .feature-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: linear-gradient(90deg, #6C5CE7, #a855f7, #6366f1);
      opacity: 0;
      transition: opacity 0.35s ease;
    }
    .feature-card:hover {
      transform: translateY(-8px);
      box-shadow:
        0 20px 40px rgba(0,0,0,0.08),
        0 4px 12px rgba(0,0,0,0.04);
      border-color: rgba(108,92,231,0.15);
    }
    .feature-card:hover::before { opacity: 1; }
    .feature-icon-wrap {
      width: 56px;
      height: 56px;
      border-radius: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 22px;
      transition: transform 0.3s ease;
    }
    .feature-card:hover .feature-icon-wrap {
      transform: scale(1.08);
    }
    .feature-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: #1a1a2e;
    }
    .feature-card p {
      font-size: 14px;
      color: #5a6a7e;
      line-height: 1.75;
    }

    /* ===== Showcase ===== */
    .showcase-row {
      display: grid;
      grid-template-columns: 1fr 1.15fr;
      gap: 80px;
      align-items: center;
    }
    .showcase-row.reverse {
      grid-template-columns: 1.15fr 1fr;
    }
    .showcase-text { max-width: 520px; }
    .showcase-row.reverse .showcase-text {
      margin-left: auto;
    }
    .check-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .check-list li {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 15px;
      color: #2d2d3f;
      font-weight: 500;
    }
    .check-list li svg {
      color: #10b981;
      flex-shrink: 0;
      width: 20px;
      height: 20px;
      background: rgba(16,185,129,0.1);
      padding: 3px;
      border-radius: 6px;
    }

    /* ===== Tool Grid ===== */
    .tool-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 48px;
    }
    .tool-card {
      background: #fff;
      border: 1px solid rgba(0,0,0,0.05);
      border-radius: 20px;
      padding: 32px 28px;
      transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
      box-shadow: 0 1px 3px rgba(0,0,0,0.03);
      position: relative;
      overflow: hidden;
    }
    .tool-card::after {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 100% 0%, rgba(108,92,231,0.04), transparent 70%);
      opacity: 0;
      transition: opacity 0.35s ease;
    }
    .tool-card:hover {
      transform: translateY(-6px);
      box-shadow:
        0 20px 40px rgba(0,0,0,0.08),
        0 4px 12px rgba(0,0,0,0.04);
      border-color: rgba(108,92,231,0.12);
    }
    .tool-card:hover::after { opacity: 1; }
    .tool-icon {
      width: 52px;
      height: 52px;
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 26px;
      margin-bottom: 18px;
      background: linear-gradient(135deg, #f4f5f8, #eef1f7);
      border: 1px solid rgba(0,0,0,0.04);
      transition: transform 0.3s ease;
    }
    .tool-card:hover .tool-icon {
      transform: scale(1.1) rotate(-5deg);
    }
    .tool-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
      color: #1a1a2e;
    }
    .tool-card p {
      font-size: 14px;
      color: #5a6a7e;
      line-height: 1.75;
    }

    /* ===== Scenarios ===== */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 48px;
    }
    .scenario-card {
      background: #fff;
      border: 1px solid rgba(0,0,0,0.05);
      border-radius: 20px;
      padding: 32px 28px;
      transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
      box-shadow: 0 1px 3px rgba(0,0,0,0.03);
    }
    .scenario-card:hover {
      transform: translateY(-6px);
      box-shadow:
        0 20px 40px rgba(0,0,0,0.08),
        0 4px 12px rgba(0,0,0,0.04);
      border-color: rgba(108,92,231,0.15);
    }
    .scenario-icon-wrap {
      width: 52px;
      height: 52px;
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 26px;
      margin-bottom: 18px;
      background: linear-gradient(135deg, rgba(108,92,231,0.08), rgba(168,85,247,0.05));
      border: 1px solid rgba(108,92,231,0.1);
      transition: transform 0.3s ease;
    }
    .scenario-card:hover .scenario-icon-wrap {
      transform: scale(1.1);
    }
    .scenario-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: #1a1a2e;
    }
    .scenario-card p {
      font-size: 14px;
      color: #5a6a7e;
      line-height: 1.75;
    }

    /* ===== Stats ===== */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-top: 48px;
    }
    .stat-card-landing {
      background: #fff;
      border: 1px solid rgba(0,0,0,0.05);
      border-radius: 20px;
      padding: 36px 24px;
      text-align: center;
      box-shadow: 0 1px 3px rgba(0,0,0,0.03);
      transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
      position: relative;
      overflow: hidden;
    }
    .stat-card-landing::before {
      content: '';
      position: absolute;
      bottom: 0;
      left: 20%;
      right: 20%;
      height: 3px;
      background: linear-gradient(90deg, #6C5CE7, #a855f7);
      border-radius: 2px;
      opacity: 0;
      transition: opacity 0.35s ease;
    }
    .stat-card-landing:hover {
      transform: translateY(-6px);
      box-shadow:
        0 20px 40px rgba(0,0,0,0.08),
        0 4px 12px rgba(0,0,0,0.04);
    }
    .stat-card-landing:hover::before { opacity: 1; }
    .stat-card-landing .stat-value,
    .stat-card-landing .stat-unit {
      font-size: 46px;
      font-weight: 850;
      background: linear-gradient(135deg, #6C5CE7, #a855f7);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: -2px;
      line-height: 1;
    }
    .stat-card-landing .stat-unit { margin-left: 2px; }
    .stat-card-landing .stat-label {
      display: block;
      margin-top: 14px;
      font-size: 14px;
      color: #5a6a7e;
      font-weight: 600;
    }

    /* ===== Customers ===== */
    .customer-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-top: 48px;
      align-items: stretch;
    }
    .customer-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 16px;
      padding: 32px 16px 24px;
      background: #fff;
      border: 1px solid rgba(0,0,0,0.05);
      border-radius: 16px;
      transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
      box-shadow: 0 1px 3px rgba(0,0,0,0.03);
    }
    .customer-item:hover {
      transform: translateY(-4px);
      box-shadow:
        0 12px 28px rgba(0,0,0,0.08),
        0 2px 6px rgba(0,0,0,0.04);
      border-color: rgba(108,92,231,0.15);
    }
    .customer-item img {
      max-width: 92%;
      width: auto;
      height: auto;
      max-height: 110px;
      object-fit: contain;
      opacity: 0.9;
      transition: all 0.35s ease;
    }
    .customer-item:hover img {
      opacity: 1;
      transform: scale(1.05);
    }
    .customer-item span {
      font-size: 13px;
      font-weight: 600;
      color: #3a3a5c;
      text-align: center;
      line-height: 1.3;
      transition: color 0.3s ease;
    }
    .customer-item:hover span {
      color: #6C5CE7;
    }

    /* ===== Testimonials ===== */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 48px;
    }
    .testimonial-card {
      background: #fff;
      border: 1px solid rgba(0,0,0,0.05);
      border-radius: 20px;
      padding: 32px 28px;
      box-shadow: 0 1px 3px rgba(0,0,0,0.03);
      transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .testimonial-card:hover {
      transform: translateY(-4px);
      box-shadow:
        0 16px 32px rgba(0,0,0,0.06),
        0 4px 10px rgba(0,0,0,0.03);
    }
    .stars {
      color: #f59e0b;
      font-size: 18px;
      letter-spacing: 2px;
      margin-bottom: 18px;
    }
    .testimonial-card p {
      font-size: 15px;
      color: #3a3a5c;
      line-height: 1.8;
      margin-bottom: 24px;
      position: relative;
      padding-left: 16px;
      border-left: 3px solid rgba(108,92,231,0.15);
    }
    .testimonial-card footer {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .testimonial-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, #6C5CE7, #a855f7);
      color: white;
      font-size: 15px;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 2px 8px rgba(108,92,231,0.25);
    }
    .testimonial-card footer strong {
      display: block;
      font-size: 15px;
      font-weight: 700;
      color: #1a1a2e;
    }
    .testimonial-card footer span {
      font-size: 13px;
      color: #5a6a7e;
      font-weight: 500;
    }

    /* ===== Pricing ===== */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 48px;
      align-items: start;
    }
    .pricing-card {
      background: #fff;
      border: 1px solid rgba(0,0,0,0.06);
      border-radius: 22px;
      padding: 31px 32px;
      box-shadow: 0 1px 3px rgba(0,0,0,0.03);
      transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
      position: relative;
    }
    .pricing-card:hover {
      transform: translateY(-6px);
      box-shadow:
        0 20px 40px rgba(0,0,0,0.08),
        0 4px 12px rgba(0,0,0,0.04);
    }
    .pricing-card.highlight {
      border-color: rgba(108,92,231,0.3);
      box-shadow:
        0 16px 48px rgba(108,92,231,0.12),
        0 4px 16px rgba(108,92,231,0.06);
      transform: scale(1.03);
      background: linear-gradient(180deg, #fff 0%, #faf8ff 100%);
    }
    .pricing-card.highlight:hover {
      transform: scale(1.03) translateY(-6px);
      box-shadow:
        0 24px 56px rgba(108,92,231,0.18),
        0 6px 20px rgba(108,92,231,0.08);
    }
    .pricing-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      color: #6C5CE7;
      margin-bottom: 14px;
      padding: 5px 12px;
      background: rgba(108,92,231,0.08);
      border-radius: var(--radius-full);
      letter-spacing: 0.3px;
    }
    .pricing-tag.popular {
      background: linear-gradient(135deg, #6C5CE7, #a855f7);
      color: #fff;
      box-shadow: 0 4px 12px rgba(108,92,231,0.3);
    }
    .pricing-card h3 {
      font-size: 24px;
      font-weight: 800;
      margin-bottom: 8px;
      color: #1a1a2e;
    }
    .pricing-desc {
      font-size: 14px;
      color: #5a6a7e;
      line-height: 1.7;
      margin-bottom: 20px;
      min-height: 44px;
    }
    .pricing-price {
      display: flex;
      align-items: baseline;
      margin-bottom: 24px;
      padding-bottom: 24px;
      border-bottom: 1px solid rgba(0,0,0,0.05);
    }
    .pricing-price .currency {
      font-size: 24px;
      font-weight: 700;
      color: #1a1a2e;
    }
    .pricing-price .amount {
      font-size: 52px;
      font-weight: 850;
      color: #1a1a2e;
      line-height: 1;
      margin: 0 4px;
      letter-spacing: -2px;
    }
    .pricing-price .period {
      font-size: 14px;
      color: #5a6a7e;
      font-weight: 500;
    }
    .pricing-contact {
      font-size: 30px;
      font-weight: 800;
      color: #1a1a2e;
    }
    .pricing-features {
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-bottom: 32px;
    }
    .pricing-features li {
      font-size: 14px;
      color: #4a5568;
      padding-left: 24px;
      position: relative;
      font-weight: 500;
    }
    .pricing-features li::before {
      content: '✓';
      position: absolute;
      left: 0;
      color: #10b981;
      font-weight: 700;
      font-size: 13px;
    }
    .pricing-btn {
      display: block;
      width: 100%;
      padding: 13px;
      text-align: center;
      border-radius: 12px;
      font-size: 15px;
      font-weight: 700;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      letter-spacing: 0.2px;
    }
    .pricing-btn.primary {
      background: linear-gradient(135deg, #6C5CE7, #7c6cf0);
      color: #fff;
      box-shadow: 0 4px 16px rgba(108,92,231,0.25);
    }
    .pricing-btn.primary:hover {
      box-shadow: 0 8px 24px rgba(108,92,231,0.4);
      transform: translateY(-2px);
    }
    .pricing-btn.outline {
      background: #fff;
      color: #3a3a5c;
      border: 1.5px solid rgba(0,0,0,0.1);
    }
    .pricing-btn.outline:hover {
      background: #f8f9fb;
      border-color: rgba(108,92,231,0.3);
    }

    /* ===== FAQ ===== */
    .faq-list {
      margin-top: 48px;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: #fff;
      border: 1px solid rgba(0,0,0,0.05);
      border-radius: 16px;
      overflow: hidden;
      box-shadow: 0 1px 3px rgba(0,0,0,0.02);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .faq-item:hover {
      border-color: rgba(108,92,231,0.15);
      box-shadow: 0 4px 16px rgba(0,0,0,0.04);
    }
    .faq-item[open] {
      border-color: rgba(108,92,231,0.2);
      box-shadow: 0 4px 16px rgba(108,92,231,0.06);
    }
    .faq-item summary {
      padding: 22px 28px;
      font-size: 16px;
      font-weight: 600;
      color: #1a1a2e;
      cursor: pointer;
      list-style: none;
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: all 0.25s ease;
      user-select: none;
    }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after {
      content: '';
      width: 10px;
      height: 10px;
      border-right: 2px solid #94a3b8;
      border-bottom: 2px solid #94a3b8;
      transform: rotate(45deg);
      transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      flex-shrink: 0;
      margin-left: 16px;
    }
    .faq-item[open] summary {
      color: #6C5CE7;
      padding-bottom: 12px;
    }
    .faq-item[open] summary::after {
      transform: rotate(225deg);
      border-color: #6C5CE7;
    }
    .faq-item summary:hover { background: #fafbfd; }
    .faq-content {
      padding: 0 28px 24px;
      font-size: 14px;
      color: #5a6a7e;
      line-height: 1.8;
    }

    /* ===== CTA ===== */
    .cta-section {
      padding: 120px 0;
      background: linear-gradient(160deg, #0f0f23 0%, #1a1040 40%, #0d1530 100%);
      color: white;
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    .cta-section::before {
      content: '';
      position: absolute;
      inset: 0;
      background:
        radial-gradient(ellipse at 30% -20%, rgba(108,92,231,0.3), transparent 50%),
        radial-gradient(ellipse at 70% 80%, rgba(168,85,247,0.2), transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(99,102,241,0.1), transparent 60%);
      pointer-events: none;
    }
    .cta-section::after {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    }
    .cta-section .container { position: relative; z-index: 1; }
    .cta-title {
      font-size: 44px;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 20px;
      letter-spacing: -1.5px;
    }
    .cta-desc {
      font-size: 18px;
      color: rgba(255,255,255,0.6);
      margin-bottom: 36px;
      font-weight: 400;
    }
    .cta-section .btn-primary-lg {
      background: linear-gradient(135deg, #fff, #f0edff);
      color: #6C5CE7;
      box-shadow: 0 8px 32px rgba(108,92,231,0.3);
      font-size: 17px;
      padding: 16px 36px;
    }
    .cta-section .btn-primary-lg::after {
      background: linear-gradient(135deg, transparent 0%, rgba(108,92,231,0.08) 50%, transparent 100%);
    }
    .cta-section .btn-primary-lg:hover {
      box-shadow: 0 12px 40px rgba(108,92,231,0.5);
      transform: translateY(-3px);
    }

    /* ===== Footer ===== */
    .site-footer {
      background: #f4f5f7;
      color: #5a6a7e;
      padding: 80px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 48px;
      margin-bottom: 56px;
    }
    .footer-brand .brand {
      color: #1a1a2e;
      margin-bottom: 16px;
      font-size: 18px;
    }
    .footer-brand .brand img {
      height: 48px;
    }
    .footer-brand p {
      font-size: 14px;
      line-height: 1.8;
      max-width: 300px;
    }
    .footer-col h4 {
      font-size: 13px;
      font-weight: 700;
      color: #1a1a2e;
      margin-bottom: 20px;
      text-transform: uppercase;
      letter-spacing: 0.8px;
    }
    .footer-col a {
      display: block;
      font-size: 14px;
      color: #5a6a7e;
      margin-bottom: 12px;
      transition: all 0.25s ease;
    }
    .footer-col a:hover {
      color: #6C5CE7;
      padding-left: 4px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(0,0,0,0.06);
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: #8a9bb5;
      display: flex;
      justify-content: center;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
    }
    .footer-divider {
      margin: 0 8px;
      color: #8a9bb5;
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
      .hero-grid,
      .showcase-row,
      .showcase-row.reverse {
        grid-template-columns: 1fr;
        gap: 56px;
      }
      .hero-content { max-width: 100%; text-align: center; }
      .hero-actions { justify-content: center; }
      .hero-trust { justify-content: center; }
      .showcase-text { max-width: 100%; }
      .showcase-row.reverse .showcase-text { margin-left: 0; }
      .feature-grid,
      .scenario-grid,
      .testimonial-grid,
      .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .tool-grid { grid-template-columns: repeat(2, 1fr); }
      .stats-grid { grid-template-columns: repeat(2, 1fr); }
      .customer-grid { grid-template-columns: repeat(3, 1fr); }
      .section-title, .section-title-left { font-size: 34px; }
      .hero-title { font-size: 46px; }
      .hero-section { padding: 110px 0 80px; }
      .cta-title { font-size: 36px; }
      .showcase-text { text-align: center; }
      .check-list { align-items: flex-start; }
      .header-nav { display: none; }
      .mobile-menu-toggle { display: flex; }
      .mobile-menu.open { display: block; }
      .pricing-card.highlight { transform: none; }
      .pricing-card.highlight:hover { transform: translateY(-6px); }
    }

    @media (max-width: 768px) {
      .section-nav { display: none; }
      .section { 
        padding: 60px 0; 
        min-height: auto; 
        display: block; 
      }
      .hero-section { 
        padding: 120px 0 70px; 
        min-height: auto; 
        display: block; 
      }
      .hero-title { font-size: 38px; letter-spacing: -1.5px; }
      .hero-subtitle { font-size: 16px; }
      .hero-actions { flex-direction: column; align-items: stretch; }
      .feature-grid,
      .tool-grid,
      .scenario-grid,
      .stats-grid,
      .testimonial-grid,
      .pricing-grid {
        grid-template-columns: 1fr;
      }
      .customer-grid { grid-template-columns: repeat(2, 1fr); }
      .pricing-card.highlight { transform: none; }
      .pricing-card.highlight:hover { transform: translateY(-6px); }
      .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
      .section-title, .section-title-left { font-size: 30px; }
      .cta-title { font-size: 30px; }
      .container { padding: 0 20px; }
      .header-inner { padding: 0 20px; }
      .hero-visual { max-width: 400px; margin: 0 auto; }
      .mockup-window { animation: none; }
    }

    @media (max-width: 480px) {
      .hero-title { font-size: 32px; letter-spacing: -1px; }
      .btn-primary-lg, .btn-secondary-lg { width: 100%; justify-content: center; }
      .footer-grid { grid-template-columns: 1fr; }
      .section-title, .section-title-left { font-size: 26px; }
      .hero-grid { gap: 36px; }
    }