/* ========== Reset & Variables ========== */
  *,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
  :root{
    --blue-900:#0a1628;--blue-800:#0d2240;--blue-700:#0f3460;--blue-600:#165a9c;
    --blue-500:#1a73e8;--blue-400:#4a90e2;--blue-300:#7ab8f5;--blue-200:#a8d4ff;
    --blue-100:#d6eaff;--blue-50:#eef5fc;--accent:#00c9db;--gold:#f0a500;
    --white:#ffffff;--gray-50:#f8fafc;--gray-100:#f1f5f9;--gray-200:#e2e8f0;
    --gray-300:#cbd5e1;--gray-400:#94a3b8;--gray-500:#64748b;--gray-600:#475569;
    --gray-700:#334155;--gray-800:#1e293b;--gray-900:#0f172a;
    --red:#e74c3c;--green:#27ae60;--orange:#f39c12;
    --radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-xl:24px;
    --shadow-sm:0 1px 3px rgba(0,0,0,.08);--shadow-md:0 4px 16px rgba(0,0,0,.1);
    --shadow-lg:0 8px 32px rgba(0,0,0,.12);--shadow-xl:0 16px 48px rgba(13,34,64,.15);
    --transition:all .3s cubic-bezier(.4,0,.2,1);--max-width:1200px;
  }
  html{scroll-behavior:smooth;font-size:16px}
  body{
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
    color:var(--gray-800);background:var(--gray-50);line-height:1.7;
    overflow-x:hidden;-webkit-font-smoothing:antialiased;
  }
  a{text-decoration:none;color:inherit}ul{list-style:none}img{max-width:100%;height:auto}
  .container{max-width:var(--max-width);margin:0 auto;padding:0 20px}

  /* ========== Hero Banner ========== */
  .hero{
    background:linear-gradient(160deg,var(--blue-900),var(--blue-700));
    padding:80px 20px 60px;position:relative;overflow:hidden;text-align:center;
  }
  .hero::before{
    content:'';position:absolute;inset:0;
    background:radial-gradient(ellipse at 30% 50%,rgba(0,201,219,.12),transparent 60%),
               radial-gradient(ellipse at 70% 30%,rgba(26,115,232,.1),transparent 60%);
  }
  .hero .container{position:relative;z-index:1}
  .hero .breadcrumb{
    display:flex;align-items:center;justify-content:center;gap:8px;
    font-size:.85rem;color:rgba(255,255,255,.5);margin-bottom:20px;
  }
  .hero .breadcrumb a{color:rgba(255,255,255,.7);transition:var(--transition)}
  .hero .breadcrumb a:hover{color:var(--accent)}
  .hero h1{font-size:clamp(2rem,5vw,3rem);font-weight:800;color:var(--white);margin-bottom:16px;letter-spacing:-.5px}
  .hero .hero-sub{color:rgba(255,255,255,.7);font-size:1.1rem;max-width:640px;margin:0 auto 32px}
  .hero-stats{
    display:flex;justify-content:center;gap:48px;flex-wrap:wrap;
    padding-top:40px;border-top:1px solid rgba(255,255,255,.1);
  }
  .hero-stat{text-align:center}
  .hero-stat .num{font-size:2.2rem;font-weight:800;color:var(--accent)}
  .hero-stat .label{font-size:.85rem;color:rgba(255,255,255,.6);margin-top:4px}

  /* ========== Section Common ========== */
  section{padding:80px 0}
  .section-title{text-align:center;margin-bottom:56px}
  .section-title .eyebrow{
    display:inline-block;padding:4px 14px;border-radius:20px;
    background:var(--blue-50);color:var(--blue-500);font-size:.82rem;font-weight:600;
    margin-bottom:14px;
  }
  .section-title h2{font-size:clamp(1.6rem,3.5vw,2.2rem);font-weight:800;color:var(--gray-900);margin-bottom:12px}
  .section-title p{color:var(--gray-500);font-size:1rem;max-width:560px;margin:0 auto}

  /* ========== Service Intro ========== */
  .intro-section{background:var(--white)}
  .intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
  .intro-text .accent-line{
    width:56px;height:4px;border-radius:2px;
    background:linear-gradient(90deg,var(--blue-500),var(--accent));margin-bottom:24px;
  }
  .intro-text h2{font-size:1.8rem;font-weight:800;color:var(--gray-900);margin-bottom:20px;line-height:1.4}
  .intro-text p{color:var(--gray-600);font-size:1rem;line-height:1.9;margin-bottom:16px}
  .intro-text .highlight{color:var(--blue-500);font-weight:600}
  .intro-features{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:28px}
  .intro-feature{display:flex;align-items:center;gap:10px;font-size:.9rem;color:var(--gray-700);font-weight:500}
  .intro-feature .check{
    width:24px;height:24px;border-radius:50%;flex-shrink:0;
    background:linear-gradient(135deg,var(--blue-500),var(--accent));
    display:flex;align-items:center;justify-content:center;color:var(--white);font-size:.75rem;
  }
  .intro-visual{
    position:relative;height:420px;border-radius:var(--radius-xl);overflow:hidden;
    background:linear-gradient(135deg,var(--blue-700),var(--blue-500));
    display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-xl);
  }
  .intro-visual::before{
    content:'';position:absolute;inset:0;
    background:radial-gradient(ellipse at top right,rgba(0,201,219,.2),transparent 60%);
  }
  .intro-visual .visual-icon{font-size:8rem;color:rgba(255,255,255,.15);position:relative;z-index:1}
  .intro-visual .visual-badge{
    position:absolute;bottom:24px;left:24px;right:24px;
    background:rgba(255,255,255,.95);border-radius:var(--radius-lg);padding:20px 24px;
    display:flex;align-items:center;gap:16px;z-index:1;
  }
  .intro-visual .visual-badge .vb-icon{
    width:48px;height:48px;border-radius:12px;flex-shrink:0;
    background:linear-gradient(135deg,var(--blue-500),var(--accent));
    display:flex;align-items:center;justify-content:center;font-size:1.4rem;color:var(--white);
  }
  .intro-visual .visual-badge .vb-text h4{font-size:.95rem;font-weight:700;color:var(--gray-900)}
  .intro-visual .visual-badge .vb-text p{font-size:.82rem;color:var(--gray-500);margin:0}

  /* ========== Services Grid ========== */
  .services-section{background:var(--gray-50)}
  .services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
  .service-card{
    background:var(--white);border-radius:var(--radius-lg);padding:36px 30px;
    transition:var(--transition);border:1px solid var(--gray-200);position:relative;overflow:hidden;
  }
  .service-card::before{
    content:'';position:absolute;top:0;left:0;right:0;height:4px;
    background:linear-gradient(90deg,var(--blue-500),var(--accent));
    transform:scaleX(0);transition:transform .4s ease;transform-origin:left;
  }
  .service-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-6px)}
  .service-card:hover::before{transform:scaleX(1)}
  .service-icon{
    width:64px;height:64px;border-radius:16px;margin-bottom:20px;
    display:flex;align-items:center;justify-content:center;font-size:1.8rem;
    background:linear-gradient(135deg,var(--blue-50),var(--blue-100));color:var(--blue-500);
  }
  .service-card h3{font-size:1.2rem;font-weight:700;color:var(--gray-900);margin-bottom:12px}
  .service-card .service-desc{color:var(--gray-500);font-size:.9rem;line-height:1.7;margin-bottom:16px}
  .service-features{display:flex;flex-direction:column;gap:8px;margin-bottom:20px}
  .service-features li{
    font-size:.85rem;color:var(--gray-600);display:flex;align-items:flex-start;gap:8px;line-height:1.6;
  }
  .service-features li::before{
    content:'';width:6px;height:6px;border-radius:50%;flex-shrink:0;margin-top:7px;
    background:var(--blue-400);
  }
  .service-price{
    display:flex;align-items:baseline;gap:6px;padding-top:16px;
    border-top:1px solid var(--gray-100);
  }
  .service-price .label{font-size:.8rem;color:var(--gray-400)}
  .service-price .amount{font-size:1.4rem;font-weight:800;color:var(--blue-500)}
  .service-price .unit{font-size:.8rem;color:var(--gray-400)}
  .service-btn{
    display:inline-flex;align-items:center;gap:6px;font-size:.85rem;font-weight:600;
    color:var(--blue-500);transition:var(--transition);margin-top:4px;
  }
  .service-btn:hover{gap:10px;color:var(--blue-600)}

  /* ========== Process Timeline ========== */
  .process-section{background:var(--white)}
  .process-steps{
    display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative;
  }
  .process-steps::before{
    content:'';position:absolute;top:40px;left:12%;right:12%;height:2px;
    background:linear-gradient(90deg,var(--blue-200),var(--blue-400),var(--blue-200));z-index:0;
  }
  .process-step{text-align:center;position:relative;z-index:1}
  .step-num{
    width:80px;height:80px;border-radius:50%;margin:0 auto 20px;
    background:var(--white);border:3px solid var(--blue-300);
    display:flex;align-items:center;justify-content:center;
    font-size:1.6rem;font-weight:800;color:var(--blue-500);transition:var(--transition);
    position:relative;
  }
  .step-num .step-icon{font-size:2rem}
  .process-step:hover .step-num{
    border-color:var(--blue-500);box-shadow:0 0 0 6px var(--blue-50);transform:scale(1.05);
  }
  .step-label{
    position:absolute;top:-8px;left:50%;transform:translateX(-50%);
    background:linear-gradient(135deg,var(--blue-500),var(--accent));
    color:var(--white);font-size:.7rem;font-weight:700;padding:2px 12px;border-radius:20px;
  }
  .process-step h4{font-size:1.05rem;font-weight:700;color:var(--gray-900);margin-bottom:8px}
  .process-step p{font-size:.85rem;color:var(--gray-500);line-height:1.7;max-width:200px;margin:0 auto}

  /* ========== Pricing Section ========== */
  .pricing-section{background:var(--gray-50)}
  .pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;align-items:stretch}
  .pricing-card{
    background:var(--white);border-radius:var(--radius-lg);overflow:hidden;
    border:1px solid var(--gray-200);transition:var(--transition);
    display:flex;flex-direction:column;position:relative;
  }
  .pricing-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-6px)}
  .pricing-card.featured{
    border-color:var(--blue-400);box-shadow:0 8px 40px rgba(26,115,232,.12);
  }
  .pricing-card.featured::before{
    content:'最受欢迎';position:absolute;top:16px;right:-32px;
    background:linear-gradient(135deg,var(--blue-500),var(--accent));
    color:var(--white);font-size:.72rem;font-weight:700;padding:4px 36px;
    transform:rotate(45deg);box-shadow:0 2px 8px rgba(0,0,0,.15);
  }
  .pricing-header{
    padding:32px 30px 24px;text-align:center;
    border-bottom:1px solid var(--gray-100);
  }
  .pricing-header.ph-1{background:linear-gradient(180deg,var(--gray-50),var(--white))}
  .pricing-header.ph-2{background:linear-gradient(180deg,var(--blue-50),var(--white))}
  .pricing-header.ph-3{background:linear-gradient(180deg,var(--blue-100),var(--white))}
  .pricing-header h3{font-size:1.25rem;font-weight:700;color:var(--gray-900);margin-bottom:8px}
  .pricing-header .pricing-desc{font-size:.82rem;color:var(--gray-500);margin-bottom:20px}
  .pricing-price{display:flex;align-items:baseline;justify-content:center;gap:4px}
  .pricing-price .currency{font-size:1.1rem;font-weight:700;color:var(--blue-500)}
  .pricing-price .amount{font-size:2.4rem;font-weight:800;color:var(--blue-500);line-height:1}
  .pricing-price .unit{font-size:.85rem;color:var(--gray-400)}
  .pricing-price .original{
    font-size:.85rem;color:var(--gray-400);text-decoration:line-through;margin-left:8px;
  }
  .pricing-body{padding:28px 30px;flex:1;display:flex;flex-direction:column}
  .pricing-features{display:flex;flex-direction:column;gap:12px;margin-bottom:28px;flex:1}
  .pricing-features li{font-size:.88rem;color:var(--gray-600);display:flex;align-items:flex-start;gap:10px;line-height:1.6}
  .pricing-features li .pf-icon{
    width:20px;height:20px;border-radius:50%;flex-shrink:0;
    background:var(--blue-50);color:var(--blue-500);
    display:flex;align-items:center;justify-content:center;font-size:.7rem;margin-top:1px;
  }
  .pricing-features li.disabled{color:var(--gray-300)}
  .pricing-features li.disabled .pf-icon{background:var(--gray-100);color:var(--gray-300)}
  .pricing-btn{
    display:block;text-align:center;padding:12px 24px;border-radius:50px;
    font-size:.92rem;font-weight:600;transition:var(--transition);cursor:pointer;border:none;
  }
  .pricing-btn.btn-1{background:var(--gray-100);color:var(--gray-700)}
  .pricing-btn.btn-1:hover{background:var(--gray-200)}
  .pricing-btn.btn-2{background:linear-gradient(135deg,var(--blue-500),var(--accent));color:var(--white);box-shadow:0 4px 14px rgba(26,115,232,.25)}
  .pricing-btn.btn-2:hover{box-shadow:0 6px 20px rgba(26,115,232,.35);transform:translateY(-2px)}
  .pricing-btn.btn-3{background:var(--blue-50);color:var(--blue-600);border:1.5px solid var(--blue-200)}
  .pricing-btn.btn-3:hover{background:var(--blue-100);border-color:var(--blue-400)}

  /* ========== FAQ Section ========== */
  .faq-section{background:var(--white)}
  .faq-list{max-width:800px;margin:0 auto}
  .faq-item{
    border:1px solid var(--gray-200);border-radius:var(--radius-md);
    margin-bottom:14px;overflow:hidden;transition:var(--transition);background:var(--gray-50);
  }
  .faq-item.active{border-color:var(--blue-300);background:var(--white);box-shadow:var(--shadow-sm)}
  .faq-question{
    padding:20px 24px;display:flex;align-items:center;justify-content:space-between;
    cursor:pointer;font-size:1rem;font-weight:600;color:var(--gray-800);transition:var(--transition);
  }
  .faq-question:hover{color:var(--blue-500)}
  .faq-item.active .faq-question{color:var(--blue-500)}
  .faq-question .faq-icon{
    width:28px;height:28px;border-radius:50%;flex-shrink:0;margin-left:16px;
    background:var(--blue-50);color:var(--blue-500);
    display:flex;align-items:center;justify-content:center;font-size:.9rem;
    transition:var(--transition);
  }
  .faq-item.active .faq-icon{background:var(--blue-500);color:var(--white);transform:rotate(45deg)}
  .faq-answer{
    max-height:0;overflow:hidden;transition:max-height .4s ease;
  }
  .faq-item.active .faq-answer{max-height:300px}
  .faq-answer-inner{padding:0 24px 20px;font-size:.9rem;color:var(--gray-600);line-height:1.8}

  /* ========== Stats Bar ========== */
  .stats-section{
    background:linear-gradient(160deg,var(--blue-900),var(--blue-700));
    position:relative;overflow:hidden;
  }
  .stats-section::before{
    content:'';position:absolute;inset:0;
    background:radial-gradient(ellipse at 50% 50%,rgba(0,201,219,.08),transparent 70%);
  }
  .stats-grid{
    display:grid;grid-template-columns:repeat(4,1fr);gap:32px;position:relative;z-index:1;
  }
  .stat-item{text-align:center}
  .stat-item .stat-icon{
    width:64px;height:64px;border-radius:16px;margin:0 auto 16px;
    background:rgba(255,255,255,.08);backdrop-filter:blur(10px);
    border:1px solid rgba(255,255,255,.1);
    display:flex;align-items:center;justify-content:center;font-size:1.8rem;
  }
  .stat-item .stat-num{
    font-size:2.4rem;font-weight:800;
    background:linear-gradient(135deg,var(--accent),var(--blue-300));
    -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
  }
  .stat-item .stat-label{font-size:.88rem;color:rgba(255,255,255,.6);margin-top:4px}

  /* ========== Contact CTA ========== */
  .contact-cta{background:var(--gray-50);text-align:center}
  .contact-cta-box{
    background:linear-gradient(135deg,var(--blue-700),var(--blue-500));
    border-radius:var(--radius-xl);padding:64px 40px;position:relative;overflow:hidden;
  }
  .contact-cta-box::before{
    content:'';position:absolute;inset:0;
    background:radial-gradient(ellipse at top right,rgba(0,201,219,.15),transparent 60%);
  }
  .contact-cta-box h2{font-size:2rem;font-weight:800;color:var(--white);position:relative;z-index:1;margin-bottom:16px}
  .contact-cta-box p{color:rgba(255,255,255,.7);font-size:1rem;max-width:500px;margin:0 auto 32px;position:relative;z-index:1}
  .contact-cta-box .btn{
    display:inline-flex;align-items:center;gap:8px;padding:14px 36px;border-radius:50px;
    font-size:1rem;font-weight:600;cursor:pointer;transition:var(--transition);border:none;
    background:var(--white);color:var(--blue-600);position:relative;z-index:1;
  }
  .contact-cta-box .btn:hover{transform:translateY(-2px);box-shadow:0 10px 32px rgba(0,0,0,.2)}

  /* ========== Animations ========== */
  @keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
  @keyframes pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.05)}}

  /* ========== Responsive ========== */
  @media (max-width: 1024px){
    .intro-grid{grid-template-columns:1fr;gap:40px}
    .intro-visual{height:320px}
    .services-grid{grid-template-columns:repeat(2,1fr)}
    .process-steps{grid-template-columns:repeat(2,1fr);gap:32px}
    .process-steps::before{display:none}
    .pricing-grid{grid-template-columns:1fr;max-width:500px;margin:0 auto}
    .stats-grid{grid-template-columns:repeat(2,1fr);gap:28px}
    .footer-grid{grid-template-columns:1fr 1fr}
  }
  @media (max-width: 768px){
    .nav-links{
      position:fixed;top:68px;left:0;right:0;bottom:0;background:rgba(10,22,40,.97);
      flex-direction:column;align-items:stretch;padding:20px;gap:4px;
      transform:translateX(100%);transition:transform .35s ease;backdrop-filter:blur(16px);
    }
    .nav-links.open{transform:translateX(0)}
    .nav-links a{padding:14px 20px;font-size:1rem;border-radius:var(--radius-md)}
    .nav-toggle{display:flex}
    .hero{padding:120px 16px 60px}
    .hero-stats{gap:28px}
    section{padding:56px 0}
    .intro-features{grid-template-columns:1fr}
    .services-grid{grid-template-columns:1fr}
    .process-steps{grid-template-columns:1fr}
    .stats-grid{grid-template-columns:1fr 1fr;gap:24px}
    .footer-grid{grid-template-columns:1fr;gap:32px}
    .contact-cta-box{padding:40px 24px}
    .contact-cta-box h2{font-size:1.5rem}
  }
  @media (max-width: 480px){
    .hero h1{font-size:1.6rem}
    .hero .hero-sub{font-size:.95rem}
    .hero-stats{gap:20px}
    .hero-stat .num{font-size:1.6rem}
    .intro-visual{height:260px}
    .stats-grid{grid-template-columns:1fr}
    .pricing-card.featured::before{font-size:.65rem;padding:3px 30px}
    .contact-cta-box{padding:32px 20px}
    .faq-question{font-size:.92rem;padding:18px 16px}
  }