/* ========================================
   深空智策 - 企业官网主样式
   设计系统：暗色科技风 + 渐变色彩
   配色：背景#0a0a0f，主色#2563eb，渐变indigo→purple→pink
   ======================================== */

/* ===== Reset & Base ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
    --bg:#0a0a0f;
    --bg-card:#12121a;
    --bg-hover:#1a1a25;
    --text:#e8e8f0;
    --text-dim:#8888a0;
    --text-bright:#ffffff;
    --accent:#2563eb;
    --accent-light:#60a5fa;
    --accent-glow:rgba(37,99,235,0.3);
    --gradient:linear-gradient(135deg,#1e3a8a 0%,#2563eb 50%,#0ea5e9 100%);
    --gradient-text:linear-gradient(135deg,#60a5fa,#38bdf8,#7dd3fc);
    --border:rgba(255,255,255,0.08);
    --border-hover:rgba(255,255,255,0.15);
    --radius:16px;
    --radius-sm:8px;
    --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",sans-serif;
    background:var(--bg);
    color:var(--text);
    line-height:1.7;
    overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--max-width);margin:0 auto;padding:0 24px}
.section-title{font-size:2.5rem;font-weight:700;text-align:center;margin-bottom:12px;color:var(--text-bright)}
.section-desc{text-align:center;color:var(--text-dim);font-size:1.1rem;margin-bottom:48px}

/* ===== Navbar ===== */
.navbar{
    position:fixed;top:0;left:0;right:0;z-index:1000;
    background:rgba(10,10,15,0.8);
    backdrop-filter:blur(20px);
    border-bottom:1px solid var(--border);
    transition:all 0.3s ease;
}
.navbar.scrolled{background:rgba(10,10,15,0.95)}
.nav-container{
    max-width:var(--max-width);margin:0 auto;
    padding:0 24px;height:64px;
    display:flex;align-items:center;justify-content:space-between;
}
.nav-logo{display:flex;align-items:center;gap:8px;font-size:1.25rem;font-weight:700;color:var(--text-bright)}
.logo-icon{background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;font-size:1.5rem}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-links a{color:var(--text-dim);font-size:0.95rem;transition:color 0.2s;position:relative}
.nav-links a:hover{color:var(--text-bright)}
.nav-links a.active{color:var(--text-bright)}
.nav-links a.active::after{
    content:"";position:absolute;bottom:-4px;left:0;right:0;
    height:2px;background:var(--gradient);border-radius:2px;
}
.nav-cta{
    padding:8px 20px;background:var(--accent);color:#fff!important;
    border-radius:var(--radius-sm);transition:all 0.2s;
}
.nav-cta:hover{background:var(--accent-light);transform:translateY(-1px)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:4px}
.nav-toggle span{width:24px;height:2px;background:var(--text);border-radius:2px;transition:0.3s}
.nav-toggle.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:rotate(-45deg) translate(7px,-7px)}

/* ===== Hero ===== */
.hero{
    min-height:100vh;display:flex;align-items:center;justify-content:center;
    position:relative;overflow:hidden;padding:80px 0 40px;
}
.hero-bg{
    position:absolute;top:0;left:0;right:0;bottom:0;
    background:
        linear-gradient(180deg,rgba(10,10,15,0.82) 0%,rgba(10,10,15,0.65) 50%,rgba(10,10,15,0.88) 100%),
        url('../images/lssk_hero_bg.jpg') center/cover no-repeat;
    z-index:0;
}
.hero-content{position:relative;z-index:1;text-align:center;max-width:900px;padding:0 24px}
.hero-badge{
    display:inline-block;padding:6px 16px;
    background:rgba(37,99,235,0.1);border:1px solid rgba(37,99,235,0.3);
    border-radius:99px;font-size:0.85rem;color:var(--accent-light);
    margin-bottom:24px;
}
.hero-title{font-size:4rem;font-weight:800;line-height:1.15;color:var(--text-bright);margin-bottom:20px;letter-spacing:-0.02em}
.gradient-text{
    background:var(--gradient-text);-webkit-background-clip:text;
    -webkit-text-fill-color:transparent;background-clip:text;
}
.hero-subtitle{font-size:1.2rem;color:var(--text-dim);margin-bottom:40px;line-height:1.8}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:64px}
.hero-stats{display:flex;gap:48px;justify-content:center;flex-wrap:wrap}
.stat{text-align:center}
.stat-num{font-size:2.5rem;font-weight:800;color:var(--text-bright);background:var(--gradient-text);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.stat-label{font-size:0.9rem;color:var(--text-dim);margin-top:4px}

/* ===== Buttons ===== */
.btn{
    display:inline-block;padding:12px 32px;border-radius:var(--radius-sm);
    font-size:1rem;font-weight:600;transition:all 0.2s;cursor:pointer;
    border:none;
}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-light);transform:translateY(-2px);box-shadow:0 8px 24px var(--accent-glow)}
.btn-outline{background:transparent;border:1px solid var(--border-hover);color:var(--text)}
.btn-outline:hover{background:var(--bg-hover);border-color:var(--accent)}
.btn-large{padding:16px 48px;font-size:1.1rem}

/* ===== Problem Section ===== */
.problem{padding:100px 0}
.problem-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.problem-card{
    background:var(--bg-card);border:1px solid var(--border);
    border-radius:var(--radius);padding:32px;transition:all 0.3s;
}
.problem-card:hover{border-color:var(--border-hover);transform:translateY(-4px);box-shadow:0 12px 32px rgba(0,0,0,0.3)}
.problem-icon{font-size:2.5rem;margin-bottom:16px}
.problem-card h3{font-size:1.3rem;color:var(--text-bright);margin-bottom:8px}
.problem-card p{color:var(--text-dim);font-size:0.95rem}

/* ===== Services Overview (首页4卡片) ===== */
.services-overview{padding:100px 0}
.service-overview-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.service-overview-card{
    background:var(--bg-card);border:1px solid var(--border);
    border-radius:var(--radius);padding:32px;transition:all 0.3s;
    display:flex;flex-direction:column;
}
.service-overview-card:hover{border-color:var(--border-hover);transform:translateY(-4px);box-shadow:0 12px 32px rgba(0,0,0,0.3)}
.service-overview-icon{
    width:56px;height:56px;border-radius:var(--radius-sm);
    display:flex;align-items:center;justify-content:center;
    font-size:1.8rem;margin-bottom:16px;
    background:linear-gradient(135deg,rgba(37,99,235,0.15),rgba(14,165,233,0.15));
    border:1px solid rgba(37,99,235,0.2);
}
.service-overview-card h3{font-size:1.3rem;color:var(--text-bright);margin-bottom:8px}
.service-overview-card p{color:var(--text-dim);font-size:0.95rem;margin-bottom:16px;flex:1}
.service-overview-link{
    color:var(--accent-light);font-size:0.9rem;font-weight:600;
    display:inline-flex;align-items:center;gap:4px;transition:gap 0.2s;
}
.service-overview-link:hover{gap:8px}

/* ===== Services Detail (服务详情页) ===== */
.service-detail{padding:100px 0}
.service-detail-block{
    background:var(--bg-card);border:1px solid var(--border);
    border-radius:var(--radius);padding:48px;margin-bottom:32px;
    transition:all 0.3s;
}
.service-detail-block:hover{border-color:var(--border-hover)}
.service-detail-header{display:flex;align-items:flex-start;gap:20px;margin-bottom:24px}
.service-detail-icon{
    width:64px;height:64px;border-radius:var(--radius-sm);flex-shrink:0;
    display:flex;align-items:center;justify-content:center;
    font-size:2rem;
    background:linear-gradient(135deg,rgba(37,99,235,0.15),rgba(14,165,233,0.15));
    border:1px solid rgba(37,99,235,0.2);
}
.service-detail-header h3{font-size:1.8rem;color:var(--text-bright);margin-bottom:4px}
.service-detail-tag{
    display:inline-block;padding:2px 10px;font-size:0.8rem;
    background:rgba(37,99,235,0.15);color:var(--accent-light);
    border-radius:99px;margin-bottom:8px;
}
.service-detail-desc{color:var(--text-dim);font-size:1rem;line-height:1.8;margin-bottom:24px}
.service-detail-features{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:24px}
.service-detail-feature{
    display:flex;align-items:center;gap:8px;
    color:var(--text);font-size:0.95rem;
    padding:10px 14px;background:var(--bg);
    border-radius:var(--radius-sm);border:1px solid var(--border);
}
.service-detail-feature::before{content:"✓";color:var(--accent-light);font-weight:700}
.service-detail-meta{display:flex;flex-wrap:wrap;gap:24px;padding-top:20px;border-top:1px solid var(--border)}
.service-detail-meta-item{display:flex;flex-direction:column;gap:2px}
.service-detail-meta-label{font-size:0.8rem;color:var(--text-dim)}
.service-detail-meta-value{font-size:1rem;color:var(--text-bright);font-weight:600}
.service-detail-pricing{display:flex;gap:16px;flex-wrap:wrap;padding-top:20px;border-top:1px solid var(--border)}
.price-item{flex:1;min-width:120px;text-align:center;padding:16px;background:var(--bg);border-radius:var(--radius-sm);border:1px solid var(--border)}
.price-name{display:block;font-size:0.85rem;color:var(--text-dim);margin-bottom:4px}
.price-value{display:block;font-size:1.5rem;font-weight:700;color:var(--text-bright)}
.price-desc{display:block;font-size:0.8rem;color:var(--text-dim);margin-top:2px}

/* ===== Advantage Grid (优势网格) ===== */
.advantage-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.advantage-card{
    background:var(--bg-card);border:1px solid var(--border);
    border-radius:var(--radius);padding:32px;text-align:center;
    transition:all 0.3s;
}
.advantage-card:hover{border-color:rgba(37,99,235,0.3);transform:translateY(-4px)}
.advantage-icon{
    width:56px;height:56px;border-radius:50%;margin:0 auto 16px;
    display:flex;align-items:center;justify-content:center;font-size:1.6rem;
    background:var(--gradient);
}
.advantage-card h4{font-size:1.1rem;color:var(--text-bright);margin-bottom:8px}
.advantage-card p{color:var(--text-dim);font-size:0.9rem;line-height:1.6}

/* ===== Case Tabs ===== */
.case-tabs{
    display:flex;justify-content:center;gap:8px;margin-bottom:48px;
    flex-wrap:wrap;
}
.case-tab{
    padding:10px 28px;background:var(--bg-card);border:1px solid var(--border);
    border-radius:99px;color:var(--text-dim);font-size:0.95rem;font-weight:600;
    cursor:pointer;transition:all 0.2s;
}
.case-tab:hover{color:var(--text-bright);border-color:var(--border-hover)}
.case-tab.active{
    background:var(--gradient);color:#fff;border-color:transparent;
    box-shadow:0 4px 16px var(--accent-glow);
}
.case-tab-panel{display:none}
.case-tab-panel.active{display:block;animation:fadeIn 0.4s ease}
@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}

/* ===== Case Grid ===== */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.case-card{
    background:var(--bg-card);border:1px solid var(--border);
    border-radius:var(--radius);overflow:hidden;transition:all 0.3s;
    display:flex;flex-direction:column;
}
.case-card:hover{border-color:var(--border-hover);transform:translateY(-4px);box-shadow:0 12px 32px rgba(0,0,0,0.3)}
.case-cover{
    aspect-ratio:16/9;position:relative;overflow:hidden;
    display:flex;align-items:center;justify-content:center;
}
.case-cover-bg{
    position:absolute;top:0;left:0;right:0;bottom:0;
    background:linear-gradient(135deg,#1a1a2e,#16213e);
}
.case-cover-text{
    position:relative;z-index:1;text-align:center;color:var(--text-dim);
    font-size:0.9rem;padding:16px;
}
.case-cover-text .cover-icon{font-size:2.5rem;display:block;margin-bottom:8px;opacity:0.5}
.case-body{padding:20px;flex:1;display:flex;flex-direction:column}
.case-tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px}
.case-tag{
    padding:2px 10px;font-size:0.75rem;border-radius:99px;
    background:rgba(37,99,235,0.15);color:var(--accent-light);
    border:1px solid rgba(37,99,235,0.2);
}
.case-tag.tag-type{
    background:rgba(14,165,233,0.12);color:#7dd3fc;
    border-color:rgba(14,165,233,0.2);
}
.case-body h4{font-size:1.1rem;color:var(--text-bright);margin-bottom:8px}
.case-body p{color:var(--text-dim);font-size:0.9rem;line-height:1.6;margin-bottom:12px;flex:1}
.case-link{
    color:var(--accent-light);font-size:0.9rem;font-weight:600;
    display:inline-flex;align-items:center;gap:4px;transition:gap 0.2s;
}
.case-link:hover{gap:8px}

/* ===== Video Card ===== */
.video-card{
    background:var(--bg-card);border:1px solid var(--border);
    border-radius:var(--radius);overflow:hidden;transition:all 0.3s;
    display:flex;flex-direction:column;
}
.video-card:hover{border-color:var(--border-hover);transform:translateY(-4px);box-shadow:0 12px 32px rgba(0,0,0,0.3)}
.video-cover{
    aspect-ratio:16/9;position:relative;overflow:hidden;cursor:pointer;
    display:flex;align-items:center;justify-content:center;
}
.video-cover-bg{
    position:absolute;top:0;left:0;right:0;bottom:0;
    background:linear-gradient(135deg,#1a1a2e,#0f3460);
}
.video-play-btn{
    position:relative;z-index:2;width:64px;height:64px;
    border-radius:50%;background:rgba(255,255,255,0.15);
    backdrop-filter:blur(10px);border:2px solid rgba(255,255,255,0.3);
    display:flex;align-items:center;justify-content:center;
    transition:all 0.3s;
}
.video-card:hover .video-play-btn{
    background:var(--accent);border-color:var(--accent-light);
    transform:scale(1.1);box-shadow:0 0 24px var(--accent-glow);
}
.video-play-icon{
    width:0;height:0;border-style:solid;
    border-width:12px 0 12px 20px;
    border-color:transparent transparent transparent #fff;
    margin-left:4px;
}
.video-duration{
    position:absolute;bottom:8px;right:8px;z-index:2;
    padding:2px 8px;font-size:0.75rem;color:#fff;
    background:rgba(0,0,0,0.6);border-radius:4px;
}
.video-body{padding:20px;flex:1;display:flex;flex-direction:column}
.video-body h4{font-size:1.1rem;color:var(--text-bright);margin-bottom:8px}
.video-body p{color:var(--text-dim);font-size:0.9rem;line-height:1.6;margin-bottom:12px;flex:1}

/* ===== Image Gallery ===== */
.image-gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.gallery-item{
    border-radius:var(--radius);overflow:hidden;position:relative;
    border:1px solid var(--border);transition:all 0.3s;
    aspect-ratio:4/3;
    display:flex;align-items:center;justify-content:center;
}
.gallery-item:hover{border-color:var(--border-hover);transform:scale(1.02)}
.gallery-placeholder{
    width:100%;height:100%;display:flex;flex-direction:column;
    align-items:center;justify-content:center;
    background:linear-gradient(135deg,#1a1a2e,#16213e);
    color:var(--text-dim);text-align:center;padding:16px;
}
.gallery-placeholder .ph-icon{font-size:2.5rem;margin-bottom:8px;opacity:0.5}
.gallery-placeholder .ph-label{font-size:0.85rem;font-weight:600;color:var(--text)}
.gallery-placeholder .ph-desc{font-size:0.75rem;margin-top:4px}
.gallery-overlay{
    position:absolute;bottom:0;left:0;right:0;padding:16px;
    background:linear-gradient(transparent,rgba(0,0,0,0.7));
    color:#fff;font-size:0.9rem;font-weight:600;
    opacity:0;transition:opacity 0.3s;
}
.gallery-item:hover .gallery-overlay{opacity:1}

/* ===== Report Card ===== */
.report-card{
    background:var(--bg-card);border:1px solid var(--border);
    border-radius:var(--radius);overflow:hidden;transition:all 0.3s;
    display:flex;flex-direction:column;
}
.report-card:hover{border-color:var(--border-hover);transform:translateY(-4px);box-shadow:0 12px 32px rgba(0,0,0,0.3)}
.report-cover{
    aspect-ratio:4/3;position:relative;overflow:hidden;
    display:flex;align-items:center;justify-content:center;
    background:linear-gradient(135deg,#0f3460,#1a1a2e);
}
.report-cover-icon{font-size:3rem;opacity:0.4}
.report-badge{
    position:absolute;top:8px;right:8px;z-index:2;
    padding:2px 10px;font-size:0.72rem;border-radius:99px;
    background:rgba(234,179,8,0.15);color:#fbbf24;
    border:1px solid rgba(234,179,8,0.3);
}
.report-body{padding:20px;flex:1;display:flex;flex-direction:column}
.report-body h4{font-size:1.1rem;color:var(--text-bright);margin-bottom:8px}
.report-body p{color:var(--text-dim);font-size:0.9rem;line-height:1.6;margin-bottom:12px;flex:1}
.report-meta{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:12px}
.report-meta-item{font-size:0.8rem;color:var(--text-dim)}
.report-meta-item::before{content:"📋 "}
.report-link{
    color:var(--accent-light);font-size:0.9rem;font-weight:600;
    display:inline-flex;align-items:center;gap:4px;transition:gap 0.2s;
}
.report-link:hover{gap:8px}

/* ===== Featured Cases (首页精选案例) ===== */
.featured-cases{padding:100px 0;background:linear-gradient(180deg,transparent,rgba(37,99,235,0.03),transparent)}

/* ===== Timeline ===== */
.timeline{position:relative;max-width:800px;margin:0 auto;padding:20px 0}
.timeline::before{
    content:"";position:absolute;left:50%;top:0;bottom:0;width:2px;
    background:linear-gradient(180deg,var(--accent),var(--accent-light),transparent);
    transform:translateX(-50%);
}
.timeline-item{position:relative;width:50%;padding:0 40px 48px 0;margin-left:0}
.timeline-item:nth-child(even){margin-left:50%;padding:0 0 48px 40px}
.timeline-dot{
    position:absolute;top:6px;right:-8px;width:16px;height:16px;
    border-radius:50%;background:var(--accent);
    border:3px solid var(--bg);box-shadow:0 0 12px var(--accent-glow);
    z-index:2;
}
.timeline-item:nth-child(even) .timeline-dot{left:-8px;right:auto}
.timeline-content{
    background:var(--bg-card);border:1px solid var(--border);
    border-radius:var(--radius);padding:24px;transition:all 0.3s;
}
.timeline-content:hover{border-color:var(--border-hover);transform:translateY(-2px)}
.timeline-date{
    display:inline-block;padding:2px 12px;font-size:0.85rem;
    background:rgba(37,99,235,0.15);color:var(--accent-light);
    border-radius:99px;margin-bottom:10px;font-weight:600;
}
.timeline-content h4{font-size:1.1rem;color:var(--text-bright);margin-bottom:6px}
.timeline-content p{color:var(--text-dim);font-size:0.9rem}

/* ===== Contact Form ===== */
.contact-form-wrap{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.contact-form{
    background:var(--bg-card);border:1px solid var(--border);
    border-radius:var(--radius);padding:40px;
}
.form-group{margin-bottom:20px}
.form-label{
    display:block;font-size:0.9rem;color:var(--text);
    margin-bottom:6px;font-weight:600;
}
.form-label .required{color:#ef4444}
.form-input,.form-textarea{
    width:100%;padding:12px 16px;background:var(--bg);
    border:1px solid var(--border);border-radius:var(--radius-sm);
    color:var(--text);font-size:0.95rem;font-family:inherit;
    transition:border-color 0.2s;
}
.form-input:focus,.form-textarea:focus{
    outline:none;border-color:var(--accent);
    box-shadow:0 0 0 3px var(--accent-glow);
}
.form-textarea{resize:vertical;min-height:120px}
.form-input::placeholder,.form-textarea::placeholder{color:var(--text-dim);opacity:0.6}
.form-submit{width:100%;margin-top:8px}
.contact-info-card{
    background:var(--bg-card);border:1px solid var(--border);
    border-radius:var(--radius);padding:40px;
}
.contact-info-item{
    display:flex;align-items:flex-start;gap:16px;
    padding:20px 0;border-bottom:1px solid var(--border);
}
.contact-info-item:last-child{border-bottom:none}
.contact-info-icon{
    width:44px;height:44px;border-radius:var(--radius-sm);flex-shrink:0;
    display:flex;align-items:center;justify-content:center;font-size:1.2rem;
    background:linear-gradient(135deg,rgba(37,99,235,0.15),rgba(14,165,233,0.15));
    border:1px solid rgba(37,99,235,0.2);
}
.contact-info-text h5{font-size:0.85rem;color:var(--text-dim);margin-bottom:2px}
.contact-info-text p{font-size:1rem;color:var(--text-bright);font-weight:600}

/* ===== About Page ===== */
.about-story{padding:100px 0}
.about-story-content{max-width:800px;margin:0 auto}
.about-story-content p{color:var(--text-dim);font-size:1.05rem;line-height:1.9;margin-bottom:20px}
.about-story-quote{
    font-size:1.3rem;font-style:italic;color:var(--accent-light);
    margin-top:32px;padding-left:20px;border-left:3px solid var(--accent);
    line-height:1.6;
}
.opc-section{padding:100px 0;background:linear-gradient(180deg,transparent,rgba(37,99,235,0.03),transparent)}
.opc-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.opc-card{
    background:var(--bg-card);border:1px solid var(--border);
    border-radius:var(--radius);padding:32px;transition:all 0.3s;
}
.opc-card:hover{border-color:var(--border-hover);transform:translateY(-4px)}
.opc-card-icon{font-size:2rem;margin-bottom:12px}
.opc-card h4{font-size:1.2rem;color:var(--text-bright);margin-bottom:8px}
.opc-card p{color:var(--text-dim);font-size:0.95rem;line-height:1.7}
.credentials-section{padding:100px 0}
.credentials-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.credentials-info{display:flex;flex-direction:column;gap:12px}
.credential-item{
    display:flex;justify-content:space-between;align-items:center;
    padding:16px 20px;background:var(--bg-card);
    border:1px solid var(--border);border-radius:var(--radius-sm);
}
.credential-label{color:var(--text-dim);font-size:0.9rem;white-space:nowrap;margin-right:16px}
.credential-value{color:var(--text-bright);font-weight:600;text-align:right}
.credentials-highlight{
    background:var(--bg-card);border:1px solid var(--border);
    border-radius:var(--radius);padding:32px;
}
.credentials-highlight h3{font-size:1.4rem;color:var(--text-bright);margin-bottom:16px}
.credentials-highlight p{color:var(--text-dim);line-height:1.8;margin-bottom:12px}

/* ===== Section Divider ===== */
.section-divider{
    height:1px;max-width:200px;margin:0 auto;
    background:linear-gradient(90deg,transparent,var(--border-hover),transparent);
}

/* ===== CTA Section ===== */
.cta-section{padding:100px 0;text-align:center}
.cta-box{
    background:linear-gradient(135deg,rgba(37,99,235,0.1),rgba(14,165,233,0.1));
    border:1px solid rgba(37,99,235,0.2);
    border-radius:var(--radius);padding:64px 32px;max-width:800px;margin:0 auto;
}
.cta-box h2{font-size:2rem;color:var(--text-bright);margin-bottom:12px}
.cta-box p{color:var(--text-dim);margin-bottom:32px;font-size:1.1rem}

/* ===== Footer ===== */
.footer{padding:48px 0 32px;border-top:1px solid var(--border);background:var(--bg-card)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;margin-bottom:32px}
.footer-logo{display:flex;align-items:center;gap:8px;font-size:1.2rem;font-weight:700;color:var(--text-bright);margin-bottom:12px}
.footer-brand p{color:var(--text-dim);font-size:0.9rem;max-width:400px}
.footer-links h4{color:var(--text-bright);margin-bottom:12px;font-size:0.95rem}
.footer-links a{display:block;color:var(--text-dim);font-size:0.9rem;margin-bottom:8px;transition:color 0.2s}
.footer-links a:hover{color:var(--accent-light)}
.footer-bottom{padding-top:24px;border-top:1px solid var(--border);text-align:center}
.footer-bottom p{color:var(--text-dim);font-size:0.85rem;margin-bottom:4px}

/* ===== Image Integration Styles ===== */

/* Service Overview Icons - image version */
.service-overview-icon img{
    width:100%;height:100%;object-fit:cover;border-radius:var(--radius-sm);
    object-position:center top;
}

/* Service Detail Icons - image version */
.service-detail-icon img{
    width:100%;height:100%;object-fit:cover;border-radius:var(--radius-sm);
    object-position:center top;
}

/* Case Cover - image version */
.case-cover-img{
    position:absolute;top:0;left:0;right:0;bottom:0;
    width:100%;height:100%;object-fit:cover;
    object-position:center top;
}
.case-cover-overlay{
    position:absolute;top:0;left:0;right:0;bottom:0;
    background:linear-gradient(180deg,rgba(10,10,15,0.3) 0%,rgba(10,10,15,0.75) 100%);
    z-index:1;
}
.case-cover-text{
    position:relative;z-index:2;
}

/* Video Cover - image version */
.video-cover-img{
    position:absolute;top:0;left:0;right:0;bottom:0;
    width:100%;height:100%;object-fit:cover;
    object-position:center top;
}
.video-cover-overlay{
    position:absolute;top:0;left:0;right:0;bottom:0;
    background:linear-gradient(180deg,rgba(10,10,15,0.2) 0%,rgba(10,10,15,0.6) 100%);
    z-index:1;
}

/* Gallery Item - image version */
.gallery-item img{
    width:100%;height:100%;object-fit:cover;
    object-position:center top;
    transition:transform 0.4s;
}
.gallery-item:hover img{transform:scale(1.05)}

/* Report Cover - image version */
.report-cover-img{
    position:absolute;top:0;left:0;right:0;bottom:0;
    width:100%;height:100%;object-fit:cover;
    object-position:center top;
}
.report-cover-overlay{
    position:absolute;top:0;left:0;right:0;bottom:0;
    background:linear-gradient(180deg,rgba(10,10,15,0.3) 0%,rgba(10,10,15,0.8) 100%);
    z-index:1;
}

/* About Page Story Image */
.about-story-image-wrap{
    max-width:800px;margin:32px auto 0;
    border-radius:var(--radius);overflow:hidden;
    border:1px solid var(--border);
}
.about-story-image{
    width:100%;height:auto;display:block;
    object-position:center top;
}

/* FAQ Section */
.faq-section{padding:20px 0 100px}
.faq-list{max-width:800px;margin:0 auto}
.faq-item{
    background:var(--bg-card);border:1px solid var(--border);
    border-radius:var(--radius);margin-bottom:12px;overflow:hidden;
    transition:all 0.3s;
}
.faq-item:hover{border-color:var(--border-hover)}
.faq-question{
    padding:20px 24px;cursor:pointer;display:flex;
    align-items:center;justify-content:space-between;
    font-size:1rem;color:var(--text-bright);font-weight:600;
    user-select:none;
}
.faq-question::after{
    content:"+";font-size:1.4rem;color:var(--accent-light);
    transition:transform 0.3s;flex-shrink:0;margin-left:16px;line-height:1;
}
.faq-item.active .faq-question::after{transform:rotate(45deg)}
.faq-answer{
    max-height:0;overflow:hidden;transition:max-height 0.4s ease;
}
.faq-item.active .faq-answer{max-height:600px}
.faq-answer-inner{padding:0 24px 20px}
.faq-answer-inner p{color:var(--text-dim);font-size:0.95rem;line-height:1.8}

/* Case cover with image + title overlay */
.case-cover-title{
    position:absolute;bottom:0;left:0;right:0;z-index:2;
    padding:16px 20px;
    background:linear-gradient(transparent,rgba(0,0,0,0.85));
    color:#fff;
}
.case-cover-title h4{font-size:1rem;font-weight:700;margin:0}
.case-cover-title .case-cover-type{
    font-size:0.78rem;color:var(--accent-light);margin-bottom:4px;
}

/* ===== Responsive ===== */
@media(max-width:1024px){
    .service-overview-grid{grid-template-columns:1fr 1fr}
    .case-grid{grid-template-columns:repeat(2,1fr)}
    .image-gallery{grid-template-columns:repeat(2,1fr)}
    .advantage-grid{grid-template-columns:repeat(2,1fr)}
    .footer-grid{grid-template-columns:2fr 1fr 1fr}
}
@media(max-width:768px){
    .nav-links{display:none;position:absolute;top:64px;left:0;right:0;background:rgba(10,10,15,0.98);flex-direction:column;padding:24px;gap:16px;border-bottom:1px solid var(--border)}
    .nav-links.active{display:flex}
    .nav-toggle{display:flex}
    .hero-title{font-size:2.5rem}
    .hero-subtitle{font-size:1rem}
    .hero-stats{gap:24px}
    .stat-num{font-size:1.8rem}
    .section-title{font-size:1.8rem}
    .problem-grid{grid-template-columns:1fr}
    .service-overview-grid{grid-template-columns:1fr}
    .case-grid{grid-template-columns:1fr}
    .image-gallery{grid-template-columns:1fr}
    .advantage-grid{grid-template-columns:1fr 1fr}
    .service-detail-features{grid-template-columns:1fr}
    .contact-form-wrap{grid-template-columns:1fr}
    .credentials-grid{grid-template-columns:1fr}
    .opc-grid{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr;gap:24px}
    .hero-actions{flex-direction:column;align-items:center}
    .btn{width:100%;max-width:300px;text-align:center}
    .timeline::before{left:20px}
    .timeline-item{width:100%;padding:0 0 40px 48px;margin-left:0!important}
    .timeline-item:nth-child(even){margin-left:0;padding:0 0 40px 48px}
    .timeline-dot{left:12px!important;right:auto!important}
    .service-detail-block{padding:24px}
    .contact-form,.contact-info-card{padding:24px}
    .service-detail-header{flex-direction:column}
    .cta-box{padding:40px 20px}
}
@media(max-width:480px){
    .advantage-grid{grid-template-columns:1fr}
    .hero-stats{flex-direction:column;gap:16px}
    .case-tabs{flex-direction:column;width:100%}
    .case-tab{width:100%;text-align:center}
}

/* ===== Video Demo Section ===== */
.video-demo-section{padding:100px 0;text-align:center}
.video-demo-wrap{
    max-width:900px;margin:0 auto 32px;
    border-radius:var(--radius);overflow:hidden;
    border:1px solid var(--border);
    box-shadow:0 12px 48px rgba(0,0,0,0.4);
}
.video-demo-wrap video{
    width:100%;display:block;
    background:#000;
}
.video-demo-features{
    display:flex;justify-content:center;gap:16px;flex-wrap:wrap;
}
.video-demo-feature{
    padding:8px 20px;background:var(--bg-card);
    border:1px solid var(--border);border-radius:99px;
    color:var(--text);font-size:0.9rem;
}