/* ============================================
   Tangzhi Service Pages CSS - Shared patterns
   ============================================ */

body{background:var(--light)}

/* ===== SERVICE HERO ===== */
.service-hero{padding:140px 0 100px;background:var(--dark);position:relative;overflow:hidden}
.service-hero-bg{position:absolute;inset:0;background:radial-gradient(ellipse at 20% 60%,rgba(124,58,237,.12),transparent 60%),radial-gradient(ellipse at 80% 20%,rgba(37,99,235,.1),transparent 50%)}
.service-hero-inner{max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:2;text-align:center}
.service-hero h1{font-size:clamp(36px,5vw,64px);font-weight:800;color:#fff;line-height:1.15;margin-bottom:24px}
.service-hero h1 .highlight{background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.service-hero p{font-size:18px;color:var(--gray);max-width:600px;margin:0 auto 40px;line-height:1.8}
.service-hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* ===== SERVICE INTRO ===== */
.service-intro{padding:100px 0;background:#fff}
.service-intro-inner{max-width:1200px;margin:0 auto;padding:0 24px}
.service-intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}
.service-intro-text h2{font-size:clamp(28px,3.5vw,40px);font-weight:800;color:var(--dark);margin-bottom:24px}
.service-intro-text p{font-size:16px;color:var(--dark3);line-height:1.9;margin-bottom:16px}
.service-intro-visual{background:linear-gradient(135deg,rgba(37,99,235,.1),rgba(124,58,237,.1));border-radius:24px;padding:40px;display:flex;align-items:center;justify-content:center;min-height:300px}
.service-intro-visual svg{color:var(--primary);width:80px;height:80px}

/* ===== SECTION WRAPPERS ===== */
.service-features{padding:100px 0;background:var(--light)}
.service-process{padding:100px 0;background:#fff}

/* ===== FEATURES GRID (shared pattern) ===== */
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px;margin-top:64px}
.feature-card{background:#fff;border-radius:20px;padding:40px 32px;transition:all .4s;border:1px solid rgba(0,0,0,.05)}
.feature-card:hover{transform:translateY(-8px);box-shadow:0 20px 60px rgba(0,0,0,.08)}
.feature-icon{width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;margin-bottom:24px;background:var(--gradient);color:#fff}
.feature-card h3{font-size:20px;font-weight:700;margin-bottom:12px;color:var(--dark)}
.feature-card p{font-size:15px;color:var(--gray);line-height:1.7}

/* ===== ADVANTAGES SECTION (dark bg) ===== */
.advantages-section{padding:100px 0;background:linear-gradient(135deg,var(--dark) 0%,#1e1b4b 100%);position:relative;overflow:hidden}
.advantages-bg{position:absolute;inset:0;background:radial-gradient(ellipse at 30% 70%,rgba(37,99,235,.12),transparent 60%),radial-gradient(ellipse at 70% 30%,rgba(124,58,237,.1),transparent 50%)}
.advantages-inner{max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:2}
.advantages-header{text-align:center;margin-bottom:64px}
.advantages-header h2{font-size:clamp(28px,4vw,44px);font-weight:800;color:#fff;margin-bottom:16px}
.advantages-header p{font-size:17px;color:var(--gray)}
.advantages-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px}
.advantage-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:20px;padding:36px 28px;transition:all .4s}
.advantage-card:hover{background:rgba(255,255,255,.1);transform:translateY(-4px)}
.advantage-icon{width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;margin-bottom:20px;background:var(--gradient);color:#fff}
.advantage-card h4{font-size:18px;font-weight:700;margin-bottom:12px;color:#fff}
.advantage-card p{font-size:14px;color:var(--gray);line-height:1.7}

/* ===== PROCESS TIMELINE ===== */
.process-timeline{max-width:1000px;margin:64px auto 0;display:flex;flex-direction:column;gap:0;position:relative}
.process-timeline::before{content:'';position:absolute;left:40px;top:40px;bottom:40px;width:2px;background:linear-gradient(to bottom,var(--primary),#7c3aed,var(--green))}
.process-step{display:flex;align-items:flex-start;gap:32px;padding:32px 0;position:relative}
.process-step-num{width:80px;height:80px;min-width:80px;border-radius:50%;background:#fff;border:3px solid var(--primary);display:flex;align-items:center;justify-content:center;font-size:28px;font-weight:800;color:var(--primary);z-index:2;transition:all .4s}
.process-step:hover .process-step-num{background:var(--gradient);color:#fff;border-color:transparent;transform:scale(1.1)}
.process-step:nth-child(2) .process-step-num{border-color:var(--orange);color:var(--orange)}
.process-step:nth-child(2):hover .process-step-num{background:linear-gradient(135deg,#f59e0b,#f97316)}
.process-step:nth-child(3) .process-step-num{border-color:#7c3aed;color:#7c3aed}
.process-step:nth-child(3):hover .process-step-num{background:linear-gradient(135deg,#7c3aed,#a855f7)}
.process-step:nth-child(4) .process-step-num{border-color:var(--green);color:var(--green)}
.process-step:nth-child(4):hover .process-step-num{background:linear-gradient(135deg,#10b981,#34d399)}
.process-step:nth-child(5) .process-step-num{border-color:var(--primary);color:var(--primary)}
.process-step:nth-child(5):hover .process-step-num{background:var(--gradient)}
.process-step:nth-child(6) .process-step-num{border-color:var(--orange);color:var(--orange)}
.process-step:nth-child(6):hover .process-step-num{background:linear-gradient(135deg,#f59e0b,#f97316)}
.process-step-content h4{font-size:20px;font-weight:700;margin-bottom:8px;color:var(--dark)}
.process-step-content p{font-size:15px;color:var(--gray);line-height:1.7}

/* ===== CTA SECTION ===== */
.cta-section{padding:100px 0;background:linear-gradient(135deg,var(--dark) 0%,#1e1b4b 100%);position:relative;overflow:hidden}
.cta-bg{position:absolute;inset:0;background:radial-gradient(ellipse at 50% 50%,rgba(37,99,235,.15),transparent 70%)}
.cta-inner{max-width:680px;margin:0 auto;text-align:center;position:relative;z-index:2}
.cta-inner h2{font-size:clamp(28px,4vw,44px);font-weight:800;color:#fff;margin-bottom:16px}
.cta-inner p{font-size:17px;color:var(--gray);margin-bottom:40px}
.cta-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* ===== PACKAGES / PRICING ===== */
.service-packages{padding:100px 0;background:#fff}
.packages-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:64px}
.package-card{background:var(--light);border-radius:24px;padding:40px 32px;position:relative;transition:all .4s;border:2px solid transparent}
.package-card:hover{border-color:var(--primary);transform:translateY(-8px);box-shadow:0 20px 60px rgba(0,0,0,.08)}
.package-card.featured{background:linear-gradient(135deg,var(--dark),#1e1b4b);border-color:var(--primary)}
.package-card.featured .pkg-name,.package-card.featured .pkg-price,.package-card.featured .pkg-unit{color:#fff}
.package-card.featured .pkg-desc,.package-card.featured .pkg-features li{color:var(--gray)}
.pkg-name{font-size:24px;font-weight:800;color:var(--dark);margin-bottom:8px}
.pkg-price{font-size:42px;font-weight:800;color:var(--primary);margin-bottom:4px}
.pkg-unit{font-size:14px;color:var(--gray)}
.pkg-desc{font-size:15px;color:var(--dark3);margin:20px 0;line-height:1.7}
.pkg-features{margin:0;padding:0;list-style:none}
.pkg-features li{font-size:15px;color:var(--dark3);padding:10px 0;padding-left:24px;position:relative;border-bottom:1px solid rgba(0,0,0,.05)}
.pkg-features li:last-child{border-bottom:none}
.pkg-features li::before{content:"\2713";position:absolute;left:0;color:var(--green);font-weight:700}
.pkg-btn{display:inline-block;padding:12px 32px;border-radius:50px;font-size:15px;font-weight:600;margin-top:24px;transition:all .4s;text-decoration:none;text-align:center}
.package-card:not(.featured) .pkg-btn{background:var(--gradient);color:#fff}
.package-card.featured .pkg-btn{background:#fff;color:var(--dark)}
.pkg-btn:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.2)}

/* ===== CASES / PORTFOLIO ===== */
.service-cases{padding:100px 0;background:var(--light)}
.cases-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:64px}
.case-card{background:#fff;border-radius:20px;overflow:hidden;transition:all .4s}
.case-card:hover{transform:translateY(-4px);box-shadow:0 16px 48px rgba(0,0,0,.1)}
.case-cover{width:100%;height:220px;object-fit:cover;display:block;background:linear-gradient(135deg,var(--primary),#7c3aed)}
.case-info{padding:28px 24px}
.case-info h4{font-size:18px;font-weight:700;margin-bottom:8px;color:var(--dark)}
.case-info .case-tag{display:inline-block;padding:4px 12px;background:rgba(37,99,235,.1);color:var(--primary);border-radius:50px;font-size:12px;margin-bottom:8px}
.case-info p{font-size:14px;color:var(--gray);line-height:1.7}

/* ===== INDUSTRIES ===== */
.service-industries{padding:100px 0;background:#fff}
.industries-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;margin-top:64px}
.industry-item{background:var(--light);border-radius:16px;padding:32px 24px;text-align:center;transition:all .4s;cursor:pointer}
.industry-item:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(0,0,0,.08)}
.industry-icon{width:56px;height:56px;border-radius:14px;background:var(--gradient);display:flex;align-items:center;justify-content:center;margin:0 auto 16px;color:#fff}
.industry-item h4{font-size:16px;font-weight:700;color:var(--dark);margin-bottom:4px}
.industry-item p{font-size:13px;color:var(--gray)}

/* ===== FAQ ===== */
.service-faq{padding:100px 0;background:var(--light)}
.faq-list{max-width:800px;margin:64px auto 0;display:flex;flex-direction:column;gap:12px}
.faq-item{background:#fff;border-radius:16px;overflow:hidden;border:1px solid rgba(0,0,0,.05)}
.faq-q{width:100%;padding:20px 24px;display:flex;justify-content:space-between;align-items:center;font-size:16px;font-weight:600;color:var(--dark);background:none;border:none;cursor:pointer;text-align:left}
.faq-q::after{content:"+";font-size:20px;transition:all .3s}
.faq-q.active::after{transform:rotate(45deg)}
.faq-a{padding:0 24px 20px;font-size:15px;color:var(--gray);line-height:1.8;display:none}

/* ===== RESPONSIVE ===== */
@media(max-width:992px){
  .packages-grid{grid-template-columns:1fr}
  .cases-grid{grid-template-columns:1fr}
}
@media(max-width:960px){
  .service-intro-grid{grid-template-columns:1fr}
  .service-intro-visual{min-height:250px}
}
@media(max-width:768px){
  .process-timeline::before{left:24px}
  .process-step-num{width:56px;height:56px;min-width:56px;font-size:20px}
  .process-step{gap:16px;padding:20px 0}
}