:root {--primary-dark:#0a0a0a;--primary-charcoal:#1a1a1a;--secondary-dark:#2d2d2d;--gold-primary:#c9a962;--gold-light:#e8d5a3;--gold-dark:#a08440;--cream:#f5f3f0;--warm-white:#faf9f7;--text-gray:#666666;--text-light:#999999;--overlay-dark:rgba(10,10,10,0.85);--font-primary:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;--transition-smooth:all 0.4s cubic-bezier(0.4,0,0.2,1);--shadow-elegant:0 20px 60px rgba(0,0,0,0.3);}
* {margin:0;padding:0;box-sizing:border-box;}
html {scroll-behavior:smooth;}
body {font-family:var(--font-primary);background:var(--warm-white);color:var(--primary-charcoal);line-height:1.6;overflow-x:hidden;}

/* Hero区域 */
.case-hero {position:relative;height:100vh;min-height:700px;overflow:hidden;background:var(--primary-dark);}
.case-hero-bg {position:absolute;top:0;left:0;width:100%;height:100%;background-size:cover;background-position:center;opacity:0.8;transform:scale(1.1);animation:heroZoom 8s ease forwards;}
@keyframes heroZoom {to {transform:scale(1);}
}
.case-hero-overlay {position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(135deg,rgba(10,10,10,0.9) 0%,rgba(10,10,10,0.5) 50%,rgba(10,10,10,0.7) 100%);}
.case-hero-content {position:absolute;top:50%;left:0;right:0;transform:translateY(-50%);max-width:1400px;margin:0 auto;padding:0 40px;z-index:2;}
.case-hero-tag {display:inline-block;color:var(--gold-primary);font-size:0.85rem;letter-spacing:3px;text-transform:uppercase;margin-bottom:20px;padding:8px 20px;border:1px solid var(--gold-primary);border-radius:4px;}
.case-hero-title {font-size:3.5rem;font-weight:700;color:white;line-height:1.2;margin-bottom:24px;max-width:900px;}
.case-hero-title span {color:var(--gold-primary);font-weight:300;}
.case-hero-desc {font-size:1.2rem;color:rgba(255,255,255,0.8);max-width:650px;margin-bottom:40px;line-height:1.8;}
.case-hero-meta {display:flex;gap:40px;flex-wrap:wrap;}
.case-hero-meta-item {display:flex;align-items:center;gap:12px;color:rgba(255,255,255,0.7);font-size:0.95rem;}
.case-hero-meta-item svg {width:24px;height:24px;color:var(--gold-primary);flex-shrink:0;}
/* 滚动提示 */
.scroll-hint {position:absolute;bottom:60px;left:50%;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;gap:10px;color:rgba(255,255,255,0.6);font-size:0.8rem;letter-spacing:2px;animation:bounce 2s infinite;z-index:10;}
@keyframes bounce {0%,20%,50%,80%,100% {transform:translateX(-50%) translateY(0);}
40% {transform:translateX(-50%) translateY(-10px);}
60% {transform:translateX(-50%) translateY(-5px);}
}
.mouse {width:26px;height:40px;border:2px solid rgba(255,255,255,0.4);border-radius:13px;position:relative;}
.mouse::before {content:'';position:absolute;top:6px;left:50%;transform:translateX(-50%);width:4px;height:8px;background:var(--gold-primary);border-radius:2px;animation:scroll 2s infinite;}
@keyframes scroll {0% {opacity:1;top:6px;}
100% {opacity:0;top:18px;}
}
/* 展会介绍区域 */
.expo-intro {padding:30px 0;background:var(--cream);position:relative;overflow:hidden;}
.expo-intro::before {content:'';position:absolute;top:-50%;right:-20%;width:800px;height:800px;background:radial-gradient(circle,rgba(201,169,98,0.08) 0%,transparent 70%);pointer-events:none;}
.container {max-width:1400px;margin:0 auto;padding:0 40px;position:relative;z-index:1;}
.section-header {text-align:center;margin-bottom:80px;}
.section-tag {color:var(--gold-primary);font-size:0.85rem;letter-spacing:3px;text-transform:uppercase;margin-bottom:16px;display:block;}
.section-title {font-size:2.8rem;font-weight:700;color:var(--primary-dark);margin-bottom:20px;line-height:1.3;}
.section-desc {font-size:1.1rem;color:var(--text-gray);max-width:700px;margin:0 auto;line-height:1.8;}
.expo-info-grid {display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;}
.expo-info-content .section-title {text-align:left;}
.expo-info-content .section-tag {text-align:left;}
.expo-info-text {color:var(--text-gray);font-size:1.05rem;line-height:2;margin-bottom:40px;}
.expo-info-text strong {color:var(--primary-dark);}
.expo-stats {display:grid;grid-template-columns:repeat(2,1fr);gap:30px;}
.expo-stat-card {background:white;padding:30px;border-radius:4px;border-left:4px solid var(--gold-primary);transition:var(--transition-smooth);box-shadow:0 4px 20px rgba(0,0,0,0.06);}
.expo-stat-card:hover {transform:translateY(-5px);box-shadow:var(--shadow-elegant);}
.expo-stat-number {font-size:2.2rem;font-weight:700;color:var(--gold-dark);line-height:1;margin-bottom:8px;}
.expo-stat-label {color:var(--text-gray);font-size:0.9rem;letter-spacing:1px;}
.expo-info-panel {background:white;border-radius:4px;overflow:hidden;box-shadow:var(--shadow-elegant);}
.expo-panel-header {background:linear-gradient(135deg,var(--primary-charcoal),var(--secondary-dark));padding:30px;color:white;}
.expo-panel-header h3 {font-size:1.4rem;margin-bottom:8px;}
.expo-panel-header p {color:rgba(255,255,255,0.7);font-size:0.9rem;}
.expo-panel-body {padding:30px;}
.expo-panel-item {display:flex;align-items:flex-start;gap:16px;padding:18px 0;border-bottom:1px solid rgba(0,0,0,0.06);}
.expo-panel-item:last-child {border-bottom:none;}
.expo-panel-item svg {width:24px;height:24px;color:var(--gold-primary);flex-shrink:0;margin-top:2px;}
.expo-panel-item-content h4 {font-size:1rem;color:var(--primary-dark);margin-bottom:4px;}
.expo-panel-item-content p {color:var(--text-gray);font-size:0.9rem;}
/* 案例展示画廊 */
.case-gallery {padding:30px 0;background:var(--primary-dark);position:relative;overflow:hidden;}
.case-gallery::before {content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23c9a962' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");opacity:0.5;}
.case-gallery .section-title {color:white;}
.case-gallery .section-desc {color:rgba(255,255,255,0.7);}
.case-gallery .section-tag {color:var(--gold-primary);}
.structure-intro {display:grid;grid-template-columns:1fr 1fr;gap:60px;margin-bottom:80px;align-items:center;}
.structure-content h3 {font-size:1.8rem;color:white;margin-bottom:20px;}
.structure-content h3 span {color:var(--gold-primary);}
.structure-content p {color:rgba(255,255,255,0.8);line-height:2;margin-bottom:30px;}
.structure-features {display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.structure-feature {display:flex;align-items:center;gap:12px;padding:16px 20px;background:rgba(255,255,255,0.05);border:1px solid rgba(255,255,255,0.1);border-radius:4px;color:rgba(255,255,255,0.9);font-size:0.95rem;transition:var(--transition-smooth);}
.structure-feature:hover {background:rgba(201,169,98,0.1);border-color:var(--gold-primary);}
.structure-feature svg {width:22px;height:22px;color:var(--gold-primary);flex-shrink:0;}
/* 图片画廊 */
.gallery-grid {display:grid;grid-template-columns:repeat(4,1fr);grid-template-rows:repeat(3,280px);gap:16px;margin-bottom:60px;}
.gallery-item {position:relative;overflow:hidden;border-radius:4px;cursor:pointer;border:1px solid rgba(255,255,255,0.08);transition:var(--transition-smooth);}
.gallery-item:hover {transform:translateY(-4px);box-shadow:0 20px 60px rgba(0,0,0,0.5);border-color:var(--gold-primary);}
.gallery-item img {width:100%;height:100%;object-fit:cover;transition:transform 0.8s ease;}
.gallery-item:hover img {transform:scale(1.08);}
.gallery-item-overlay {position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(to top,rgba(10,10,10,0.9) 0%,rgba(10,10,10,0.2) 50%,transparent 100%);display:flex;flex-direction:column;justify-content:flex-end;padding:24px;opacity:0;transition:var(--transition-smooth);}
.gallery-item:hover .gallery-item-overlay {opacity:1;}
.gallery-item-label {color:var(--gold-primary);font-size:0.75rem;letter-spacing:2px;text-transform:uppercase;margin-bottom:8px;}
.gallery-item-title {color:white;font-size:1.1rem;font-weight:600;}
.gallery-item-zoom {position:absolute;top:20px;right:20px;width:44px;height:44px;background:var(--gold-primary);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transform:scale(0.5);transition:var(--transition-smooth);color:var(--primary-dark);}
.gallery-item:hover .gallery-item-zoom {opacity:1;transform:scale(1);}
.gallery-item.wide {grid-column:span 2;}
.gallery-item.tall {grid-row:span 2;}
.gallery-item.large {grid-column:span 2;grid-row:span 2;}
/* 大图灯箱 */
.lightbox {position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(10,10,10,0.95);backdrop-filter:blur(10px);z-index:9999;display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:all 0.4s ease;}
.lightbox.active {opacity:1;visibility:visible;}
.lightbox-img {max-width:90%;max-height:85vh;object-fit:contain;border-radius:4px;box-shadow:0 30px 80px rgba(0,0,0,0.5);transform:scale(0.9);transition:transform 0.4s ease;}
.lightbox.active .lightbox-img {transform:scale(1);}
.lightbox-close {position:absolute;top:30px;right:40px;width:50px;height:50px;background:rgba(255,255,255,0.1);border:1px solid rgba(255,255,255,0.2);border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;color:white;transition:var(--transition-smooth);}
.lightbox-close:hover {background:var(--gold-primary);color:var(--primary-dark);border-color:var(--gold-primary);}
.lightbox-nav {position:absolute;top:50%;transform:translateY(-50%);width:100%;display:flex;justify-content:space-between;padding:0 40px;pointer-events:none;}
.lightbox-nav-btn {width:56px;height:56px;border:1px solid rgba(255,255,255,0.3);background:rgba(255,255,255,0.05);backdrop-filter:blur(10px);border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;pointer-events:all;transition:var(--transition-smooth);color:white;}
.lightbox-nav-btn:hover {background:var(--gold-primary);border-color:var(--gold-primary);color:var(--primary-dark);}
.lightbox-caption {position:absolute;bottom:40px;left:50%;transform:translateX(-50%);color:rgba(255,255,255,0.8);font-size:1rem;text-align:center;background:rgba(10,10,10,0.6);padding:12px 30px;border-radius:4px;}
.lightbox-counter {position:absolute;top:40px;left:50%;transform:translateX(-50%);color:var(--gold-primary);font-size:0.9rem;letter-spacing:2px;}
/* 方案亮点 */
.highlights-section {padding:30px 0;background:var(--cream);}
.highlights-grid {display:grid;grid-template-columns:repeat(3,1fr);gap:30px;margin-top:60px;}
.highlight-card {background:white;padding:50px 40px;border-radius:4px;transition:var(--transition-smooth);position:relative;overflow:hidden;border:1px solid rgba(0,0,0,0.05);}
.highlight-card::before {content:'';position:absolute;top:0;left:0;width:100%;height:4px;background:linear-gradient(90deg,var(--gold-primary),var(--gold-light));transform:scaleX(0);transition:transform 0.4s ease;}
.highlight-card:hover {transform:translateY(-10px);box-shadow:var(--shadow-elegant);}
.highlight-card:hover::before {transform:scaleX(1);}
.highlight-icon {width:70px;height:70px;background:linear-gradient(135deg,var(--primary-charcoal),var(--secondary-dark));border-radius:50%;display:flex;align-items:center;justify-content:center;margin-bottom:30px;font-size:1.8rem;color:var(--gold-primary);float:left;margin-right: 30px;}
.highlight-title {font-size:1.4rem;font-weight:600;margin-bottom:16px;color:var(--primary-dark);}
.highlight-desc {color:var(--text-gray);line-height:1.8;}
/* 公司实力 */
.company-strength {padding:30px 0;background:linear-gradient(135deg,var(--primary-dark) 0%,var(--secondary-dark) 100%);position:relative;overflow:hidden;}
.company-strength::before {content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23c9a962' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");opacity:0.5;}
.company-strength .section-title {color:white;}
.company-strength .section-desc {color:rgba(255,255,255,0.7);}
.company-strength .section-tag {color:var(--gold-primary);}
.strength-grid {display:grid;grid-template-columns:repeat(4,1fr);gap:30px;margin-top:60px;}
.strength-card {background:rgba(255,255,255,0.03);border:1px solid rgba(255,255,255,0.08);border-radius:4px;padding:40px 30px;text-align:center;transition:var(--transition-smooth);position:relative;overflow:hidden;}
.strength-card:hover {background:rgba(255,255,255,0.06);border-color:var(--gold-primary);transform:translateY(-8px);}
.strength-icon {width:64px;height:64px;margin:0 auto 24px;background:linear-gradient(135deg,rgba(201,169,98,0.2),rgba(201,169,98,0.05));border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--gold-primary);}
.strength-number {font-size:2.8rem;font-weight:700;color:var(--gold-primary);line-height:1;margin-bottom:12px;}
.strength-label {color:rgba(255,255,255,0.8);font-size:1rem;margin-bottom:8px;}
.strength-sublabel {color:rgba(255,255,255,0.5);font-size:0.85rem;}
.qualifications {margin-top:80px;text-align:center;}
.qualifications h3 {color:white;font-size:1.4rem;margin-bottom:40px;}
.qualifications h3 span {color:var(--gold-primary);}
.qual-grid {display:flex;justify-content:center;gap:30px;flex-wrap:wrap;}
.qual-item {display:flex;align-items:center;gap:10px;padding:14px 24px;background:rgba(255,255,255,0.05);border:1px solid rgba(255,255,255,0.1);border-radius:4px;color:rgba(255,255,255,0.9);font-size:0.9rem;transition:var(--transition-smooth);}
.qual-item:hover {border-color:var(--gold-primary);background:rgba(201,169,98,0.1);}
.qual-item svg {width:20px;height:20px;color:var(--gold-primary);flex-shrink:0;}

/* 浮动按钮 */
.float-cta {position:fixed;right:30px;bottom:100px;z-index:999;display:flex;flex-direction:column;gap:16px;}
.float-btn {width:60px;height:60px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:white;text-decoration:none;box-shadow:0 8px 30px rgba(0,0,0,0.3);transition:var(--transition-smooth);position:relative;font-size:1.5rem;}
.float-btn-phone {background:var(--gold-primary);color:var(--primary-dark);}
.float-btn-wechat {background:#07c160;}
.float-btn-top {background:var(--secondary-dark);opacity:0;visibility:hidden;transform:translateY(20px);}
.float-btn-top.visible {opacity:1;visibility:visible;transform:translateY(0);}
.float-btn:hover {transform:scale(1.1) translateY(-5px);}
.float-tooltip {position:absolute;right:75px;background:var(--primary-dark);color:white;padding:10px 20px;border-radius:4px;font-size:0.85rem;white-space:nowrap;opacity:0;visibility:hidden;transition:var(--transition-smooth);box-shadow:0 4px 20px rgba(0,0,0,0.2);}
.float-btn:hover .float-tooltip {opacity:1;visibility:visible;}
/* 面包屑 */
.breadcrumb {background:var(--primary-dark);padding:100px 0 20px;border-bottom:1px solid rgba(255,255,255,0.05);}
.breadcrumb-inner {max-width:1400px;margin:0 auto;padding:0 40px;display:flex;align-items:center;gap:12px;color:rgba(255,255,255,0.5);font-size:0.85rem;}
.breadcrumb-inner a {color:rgba(255,255,255,0.7);text-decoration:none;transition:var(--transition-smooth);}
.breadcrumb-inner a:hover {color:var(--gold-primary);}
.breadcrumb-inner span {color:var(--gold-primary);}
/* 响应式 */
@media (max-width:1200px) {.gallery-grid {grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(4,240px);}
.highlights-grid {grid-template-columns:repeat(2,1fr);}
.strength-grid {grid-template-columns:repeat(2,1fr);}
.footer-grid {grid-template-columns:repeat(2,1fr);}
}
@media (max-width:1024px) {.header-inner {padding:0 20px;}
.nav-menu {position:fixed;top:0;right:-100%;width:80%;max-width:400px;height:100vh;background:var(--primary-dark);flex-direction:column;padding:100px 40px;gap:30px;transition:right 0.4s ease;box-shadow:-10px 0 50px rgba(0,0,0,0.5);}
.nav-menu.active {right:0;}
.mobile-menu-btn {display:flex;}
.mobile-menu-btn.active span:nth-child(1) {transform:rotate(45deg) translate(5px,5px);}
.mobile-menu-btn.active span:nth-child(2) {opacity:0;}
.mobile-menu-btn.active span:nth-child(3) {transform:rotate(-45deg) translate(7px,-6px);}
.case-hero-title {font-size:2.5rem;}
.expo-info-grid {grid-template-columns:1fr;gap:40px;}
.structure-intro {grid-template-columns:1fr;gap:40px;}
.gallery-grid {grid-template-columns:repeat(2,1fr);grid-template-rows:repeat(5,200px);}
.gallery-item.large {grid-column:span 2;grid-row:span 1;}
.gallery-item.tall {grid-row:span 1;}
.gallery-item.wide {grid-column:span 2;}
}
@media (max-width:768px) {.case-hero {min-height:600px;}
.case-hero-title {font-size:1.8rem;}
.case-hero-desc {font-size:1rem;}
.case-hero-meta {gap:20px;}
.section-title {font-size:2rem;}
.expo-stats {grid-template-columns:1fr;}
.structure-features {grid-template-columns:1fr;}
.gallery-grid {grid-template-columns:1fr;grid-template-rows:repeat(10,220px);}
.gallery-item.large,.gallery-item.wide,.gallery-item.tall {grid-column:span 1;grid-row:span 1;}
.highlights-grid {grid-template-columns:1fr;}
.strength-grid {grid-template-columns:1fr;}
.qual-grid {flex-direction:column;align-items:center;}
.qual-item {width:100%;max-width:300px;justify-content:center;}
.cta-title {font-size:2rem;}
.cta-phone {font-size:1.8rem;}
.footer-grid {grid-template-columns:1fr;gap:40px;}
.footer-bottom {flex-direction:column;gap:15px;text-align:center;}
.float-cta {right:15px;bottom:80px;}
.float-btn {width:50px;height:50px;font-size:1.2rem;}
.lightbox-nav-btn {width:44px;height:44px;}
.lightbox-nav {padding:0 15px;}
.lightbox-close {top:15px;right:15px;}
}
@media (max-width:480px) {.container {padding:0 20px;}
.case-hero-content {padding:0 20px;}
.section-title {font-size:1.6rem;}
.case-hero-title {font-size:1.6rem;}
.highlight-card {padding:30px;}
.strength-card {padding:30px 20px;}
.expo-stat-card {padding:20px;}
.expo-stat-number {font-size:1.8rem;}
}