/* 17C官网全局样式 - www.sg4p23z.cn */
:root {
  --primary: #0a0e1a;
  --secondary: #0d1b2a;
  --accent1: #00c6ff;
  --accent2: #7b2ff7;
  --accent3: #ff6ec7;
  --text: #e8eaf6;
  --text-muted: #8892b0;
  --card-bg: rgba(13,27,42,0.85);
  --border: rgba(0,198,255,0.18);
  --gradient: linear-gradient(135deg, #00c6ff 0%, #7b2ff7 60%, #ff6ec7 100%);
  --gradient-dark: linear-gradient(135deg, #0a0e1a 0%, #0d1b2a 100%);
  --radius: 14px;
  --shadow: 0 8px 40px rgba(0,198,255,0.10);
  --transition: all 0.32s cubic-bezier(0.4,0,0.2,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{background:var(--primary);color:var(--text);font-family:'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;line-height:1.7;overflow-x:hidden}
a{color:var(--accent1);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--accent3)}
img{max-width:100%;height:auto;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:80px 0}
.section-title{font-size:2rem;font-weight:700;text-align:center;margin-bottom:12px;background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.section-sub{text-align:center;color:var(--text-muted);margin-bottom:48px;font-size:1.05rem}
.btn{display:inline-block;padding:12px 32px;border-radius:50px;font-size:1rem;font-weight:600;cursor:pointer;transition:var(--transition);border:none;outline:none}
.btn-primary{background:var(--gradient);color:#fff;box-shadow:0 4px 24px rgba(0,198,255,0.25)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 32px rgba(123,47,247,0.35);color:#fff}
.btn-outline{background:transparent;border:2px solid var(--accent1);color:var(--accent1)}
.btn-outline:hover{background:var(--accent1);color:#fff}
.tag{display:inline-block;padding:3px 12px;border-radius:20px;font-size:0.78rem;font-weight:600;background:rgba(0,198,255,0.12);color:var(--accent1);border:1px solid rgba(0,198,255,0.25);margin-right:6px;margin-bottom:6px}

/* ===== HEADER ===== */
.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(10,14,26,0.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--border);transition:var(--transition)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{font-size:1.7rem;font-weight:900;background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:2px}
.nav-list{display:flex;gap:32px;list-style:none}
.nav-list a{color:var(--text-muted);font-size:0.97rem;font-weight:500;transition:var(--transition);position:relative}
.nav-list a::after{content:'';position:absolute;bottom:-4px;left:0;width:0;height:2px;background:var(--gradient);transition:var(--transition)}
.nav-list a:hover{color:var(--accent1)}
.nav-list a:hover::after{width:100%}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;background:none;border:none;padding:4px}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--text);border-radius:2px;transition:var(--transition)}

/* ===== SEARCH BAR ===== */
.search-bar-wrap{background:rgba(13,27,42,0.95);border-bottom:1px solid var(--border);padding:10px 0}
.search-bar-inner{display:flex;align-items:center;gap:10px;max-width:700px;margin:0 auto;padding:0 24px}
.search-input{flex:1;background:rgba(255,255,255,0.06);border:1px solid var(--border);border-radius:50px;padding:9px 22px;color:var(--text);font-size:0.97rem;outline:none;transition:var(--transition)}
.search-input::placeholder{color:var(--text-muted)}
.search-input:focus{border-color:var(--accent1);background:rgba(0,198,255,0.06)}
.search-btn{background:var(--gradient);border:none;border-radius:50px;padding:9px 24px;color:#fff;font-size:0.95rem;cursor:pointer;transition:var(--transition)}
.search-btn:hover{transform:scale(1.04)}

/* ===== HERO / BANNER ===== */
.hero{min-height:100vh;display:flex;align-items:center;position:relative;overflow:hidden;padding-top:120px}
.hero-bg{position:absolute;inset:0;background:url('../images/banner.jpg') center/cover no-repeat;filter:brightness(0.35) saturate(1.2);z-index:0}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(10,14,26,0.85) 0%,rgba(123,47,247,0.18) 100%);z-index:1}
.hero-content{position:relative;z-index:2;max-width:700px}
.hero-badge{display:inline-block;padding:5px 18px;border-radius:20px;background:rgba(0,198,255,0.12);border:1px solid rgba(0,198,255,0.3);color:var(--accent1);font-size:0.85rem;font-weight:600;margin-bottom:20px;letter-spacing:1px}
.hero h1{font-size:clamp(2.2rem,5vw,3.8rem);font-weight:900;line-height:1.18;margin-bottom:20px}
.hero h1 span{background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-desc{font-size:1.12rem;color:var(--text-muted);margin-bottom:36px;max-width:560px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.hero-stats{display:flex;gap:40px;margin-top:56px;flex-wrap:wrap}
.hero-stat .num{font-size:2.2rem;font-weight:800;background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-stat .label{font-size:0.88rem;color:var(--text-muted)}

/* ===== VIDEO SECTION ===== */
.video-section{background:var(--secondary)}
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.video-card{background:var(--card-bg);border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);transition:var(--transition);cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:0 16px 48px rgba(0,198,255,0.18);border-color:var(--accent1)}
.video-thumb{position:relative;aspect-ratio:16/9;overflow:hidden}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:var(--transition)}
.video-card:hover .video-thumb img{transform:scale(1.06)}
.play-btn{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,0.3);opacity:0;transition:var(--transition)}
.video-card:hover .play-btn{opacity:1}
.play-icon{width:56px;height:56px;border-radius:50%;background:rgba(0,198,255,0.85);display:flex;align-items:center;justify-content:center;box-shadow:0 0 24px rgba(0,198,255,0.5)}
.play-icon svg{width:22px;height:22px;fill:#fff;margin-left:4px}
.video-info{padding:16px}
.video-title{font-size:0.97rem;font-weight:600;margin-bottom:8px;color:var(--text);line-height:1.4}
.video-meta{display:flex;gap:14px;font-size:0.8rem;color:var(--text-muted)}
.video-meta span{display:flex;align-items:center;gap:4px}
.video-tags{padding:0 16px 14px;display:flex;flex-wrap:wrap;gap:6px}

/* ===== PRODUCTS ===== */
.products-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:28px}
.product-card{background:var(--card-bg);border-radius:var(--radius);padding:36px 28px;border:1px solid var(--border);transition:var(--transition);position:relative;overflow:hidden}
.product-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--gradient);transform:scaleX(0);transition:var(--transition)}
.product-card:hover::before{transform:scaleX(1)}
.product-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.product-icon{width:56px;height:56px;border-radius:14px;background:rgba(0,198,255,0.1);display:flex;align-items:center;justify-content:center;margin-bottom:20px;font-size:1.6rem}
.product-name{font-size:1.15rem;font-weight:700;margin-bottom:10px;color:var(--text)}
.product-desc{font-size:0.93rem;color:var(--text-muted);line-height:1.65}

/* ===== TECH ENGINE ===== */
.tech-section{background:var(--secondary)}
.tech-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:20px}
.tech-item{background:var(--card-bg);border-radius:var(--radius);padding:28px 22px;border:1px solid var(--border);text-align:center;transition:var(--transition)}
.tech-item:hover{border-color:var(--accent2);box-shadow:0 0 24px rgba(123,47,247,0.18)}
.tech-num{font-size:2.2rem;font-weight:900;background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:6px}
.tech-label{font-size:0.9rem;color:var(--text-muted)}

/* ===== SOLUTIONS ===== */
.solutions-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.solution-card{background:var(--card-bg);border-radius:var(--radius);padding:32px 26px;border:1px solid var(--border);transition:var(--transition)}
.solution-card:hover{transform:translateY(-4px);border-color:var(--accent1);box-shadow:var(--shadow)}
.solution-industry{font-size:1.1rem;font-weight:700;color:var(--accent1);margin-bottom:10px}
.solution-desc{font-size:0.93rem;color:var(--text-muted)}

/* ===== PROCESS ===== */
.process-steps{display:flex;flex-wrap:wrap;gap:0;justify-content:center;position:relative}
.process-steps::before{content:'';position:absolute;top:36px;left:10%;right:10%;height:2px;background:var(--gradient);opacity:0.3}
.step{flex:1;min-width:160px;max-width:200px;text-align:center;padding:20px 10px;position:relative;z-index:1}
.step-num{width:72px;height:72px;border-radius:50%;background:var(--gradient);display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:900;color:#fff;margin:0 auto 16px;box-shadow:0 0 24px rgba(0,198,255,0.3)}
.step-title{font-size:0.97rem;font-weight:600;margin-bottom:6px}
.step-desc{font-size:0.83rem;color:var(--text-muted)}

/* ===== CASES ===== */
.cases-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.case-card{background:var(--card-bg);border-radius:var(--radius);padding:32px 26px;border:1px solid var(--border);transition:var(--transition)}
.case-card:hover{border-color:var(--accent2);transform:translateY(-4px);box-shadow:var(--shadow)}
.case-client{font-size:1rem;font-weight:700;color:var(--accent1);margin-bottom:10px}
.case-result{font-size:0.93rem;color:var(--text-muted)}

/* ===== NEWS ===== */
.news-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.news-card{background:var(--card-bg);border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);transition:var(--transition)}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--accent1)}
.news-img{aspect-ratio:16/9;overflow:hidden}
.news-img img{width:100%;height:100%;object-fit:cover;transition:var(--transition)}
.news-card:hover .news-img img{transform:scale(1.05)}
.news-body{padding:20px}
.news-date{font-size:0.8rem;color:var(--text-muted);margin-bottom:8px}
.news-title{font-size:1rem;font-weight:600;margin-bottom:8px;color:var(--text)}
.news-excerpt{font-size:0.88rem;color:var(--text-muted);line-height:1.6}

/* ===== REVIEWS ===== */
.reviews-section{background:var(--secondary)}
.reviews-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.review-card{background:var(--card-bg);border-radius:var(--radius);padding:28px 24px;border:1px solid var(--border);transition:var(--transition)}
.review-card:hover{border-color:var(--accent3);box-shadow:0 8px 32px rgba(255,110,199,0.12)}
.review-stars{color:#f7c948;font-size:1.1rem;margin-bottom:12px}
.review-comment{font-size:0.93rem;color:var(--text-muted);line-height:1.65;margin-bottom:16px}
.review-user{font-size:0.88rem;font-weight:600;color:var(--accent1)}

/* ===== FAQ ===== */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--card-bg);border-radius:var(--radius);border:1px solid var(--border);margin-bottom:14px;overflow:hidden}
.faq-q{padding:20px 24px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:var(--transition)}
.faq-q:hover{color:var(--accent1)}
.faq-q .arrow{transition:var(--transition);font-size:1.1rem;color:var(--accent1)}
.faq-item.open .arrow{transform:rotate(180deg)}
.faq-a{padding:0 24px 20px;font-size:0.93rem;color:var(--text-muted);line-height:1.7;display:none}
.faq-item.open .faq-a{display:block}

/* ===== CONTACT ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.contact-info-list{list-style:none;display:flex;flex-direction:column;gap:18px}
.contact-info-list li{display:flex;align-items:flex-start;gap:14px;font-size:0.97rem;color:var(--text-muted)}
.contact-info-list .ci-icon{width:40px;height:40px;border-radius:10px;background:rgba(0,198,255,0.1);display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:1.1rem}
.contact-form{background:var(--card-bg);border-radius:var(--radius);padding:36px;border:1px solid var(--border)}
.form-group{margin-bottom:20px}
.form-group label{display:block;font-size:0.9rem;color:var(--text-muted);margin-bottom:7px}
.form-group input,.form-group textarea{width:100%;background:rgba(255,255,255,0.05);border:1px solid var(--border);border-radius:10px;padding:12px 16px;color:var(--text);font-size:0.95rem;outline:none;transition:var(--transition);font-family:inherit}
.form-group input:focus,.form-group textarea:focus{border-color:var(--accent1);background:rgba(0,198,255,0.05)}
.form-group textarea{resize:vertical;min-height:120px}

/* ===== FOOTER ===== */
.site-footer{background:#060910;border-top:1px solid var(--border);padding:60px 0 28px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:48px}
.footer-brand .logo{margin-bottom:14px;font-size:1.5rem}
.footer-brand p{font-size:0.88rem;color:var(--text-muted);line-height:1.7}
.footer-col h4{font-size:1rem;font-weight:700;margin-bottom:18px;color:var(--text)}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.footer-col ul li a{font-size:0.88rem;color:var(--text-muted);transition:var(--transition)}
.footer-col ul li a:hover{color:var(--accent1)}
.footer-bottom{border-top:1px solid var(--border);padding-top:24px;display:flex;justify-content:space-between;align-items:center;flex-wrap:gap;gap:12px}
.footer-bottom p{font-size:0.83rem;color:var(--text-muted)}
.footer-icp a{color:var(--text-muted);font-size:0.83rem}
.footer-icp a:hover{color:var(--accent1)}

/* ===== BREADCRUMB ===== */
.breadcrumb{padding:16px 0;font-size:0.88rem;color:var(--text-muted)}
.breadcrumb a{color:var(--text-muted)}
.breadcrumb a:hover{color:var(--accent1)}
.breadcrumb span{margin:0 8px;opacity:0.5}

/* ===== MODAL VIDEO ===== */
.video-modal{display:none;position:fixed;inset:0;z-index:9999;background:rgba(0,0,0,0.85);align-items:center;justify-content:center}
.video-modal.active{display:flex}
.video-modal-inner{position:relative;width:90%;max-width:860px;aspect-ratio:16/9;background:#000;border-radius:12px;overflow:hidden}
.video-modal video{width:100%;height:100%;object-fit:cover}
.video-modal-close{position:absolute;top:14px;right:14px;width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,0.15);border:none;color:#fff;font-size:1.2rem;cursor:pointer;display:flex;align-items:center;justify-content:center;z-index:10}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(0,198,255,0.4)}50%{box-shadow:0 0 0 14px rgba(0,198,255,0)}}
.fade-in{animation:fadeInUp 0.7s ease both}
.fade-in-2{animation:fadeInUp 0.7s 0.15s ease both}
.fade-in-3{animation:fadeInUp 0.7s 0.3s ease both}

/* ===== RESPONSIVE ===== */
@media(max-width:900px){
  .footer-grid{grid-template-columns:1fr 1fr}
  .contact-grid{grid-template-columns:1fr}
  .process-steps::before{display:none}
}
@media(max-width:680px){
  .nav-list{display:none;position:fixed;top:68px;left:0;right:0;background:rgba(10,14,26,0.98);flex-direction:column;padding:20px 24px;gap:18px;border-bottom:1px solid var(--border)}
  .nav-list.open{display:flex}
  .nav-toggle{display:flex}
  .hero h1{font-size:2rem}
  .footer-grid{grid-template-columns:1fr}
  .section{padding:56px 0}
  .section-title{font-size:1.6rem}
  .hero-stats{gap:24px}
}