/* ==================== 基础变量与首页风格一致 ==================== */
: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;}
/* ==================== 导航栏 ==================== */
/*.header {position:fixed;top:0;left:0;right:0;z-index:1000;transition:var(--transition-smooth);padding:20px 0;}
.header.scrolled {background:rgba(10,10,10,0.95);backdrop-filter:blur(20px);padding:15px 0;box-shadow:0 4px 30px rgba(0,0,0,0.3);}
.header-inner {max-width:1400px;margin:0 auto;padding:0 40px;display:flex;align-items:center;justify-content:space-between;}
.logo {display:flex;align-items:center;gap:12px;text-decoration:none;z-index:1001;}
.logo-icon {width:45px;height:45px;background:linear-gradient(135deg,var(--gold-primary),var(--gold-dark));border-radius:8px;display:flex;align-items:center;justify-content:center;font-weight:700;color:white;font-size:20px;box-shadow:0 4px 15px rgba(201,169,98,0.3);}
.logo-text {display:flex;flex-direction:column;}
.logo-name {font-size:1.4rem;font-weight:700;color:white;letter-spacing:2px;}
.logo-slogan {font-size:0.75rem;color:var(--gold-primary);letter-spacing:1px;text-transform:uppercase;}
.nav-menu {display:flex;align-items:center;gap:40px;list-style:none;}
.nav-link {color:rgba(255,255,255,0.9);text-decoration:none;font-size:0.95rem;font-weight:500;letter-spacing:1px;position:relative;padding:5px 0;transition:var(--transition-smooth);}
.nav-link::after {content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:var(--gold-primary);transition:var(--transition-smooth);}
.nav-link:hover {color:var(--gold-primary);}
.nav-link:hover::after {width:100%;}
.header-cta {display:flex;align-items:center;gap:30px;}
.phone-info {text-align:right;}
.phone-label {display:block;font-size:0.7rem;color:var(--gold-primary);letter-spacing:1px;text-transform:uppercase;margin-bottom:2px;}
.phone-number {font-size:1.1rem;color:white;font-weight:600;letter-spacing:1px;}
.btn-primary {background:linear-gradient(135deg,var(--gold-primary),var(--gold-dark));color:var(--primary-dark);padding:14px 32px;border-radius:4px;text-decoration:none;font-weight:600;font-size:0.9rem;letter-spacing:1px;transition:var(--transition-smooth);border:none;cursor:pointer;box-shadow:0 4px 20px rgba(201,169,98,0.3);display:inline-block;}
.btn-primary:hover {transform:translateY(-2px);box-shadow:0 8px 30px rgba(201,169,98,0.4);}
.btn-outline {background:transparent;color:white;padding:12px 30px;border:1px solid rgba(255,255,255,0.3);border-radius:4px;text-decoration:none;font-weight:500;transition:var(--transition-smooth);display:inline-block;}
.btn-outline:hover {background:white;color:var(--primary-dark);}
.mobile-menu-btn {display:none;flex-direction:column;gap:6px;background:none;border:none;cursor:pointer;z-index:1001;padding:10px;}
.mobile-menu-btn span {display:block;width:28px;height:2px;background:white;transition:var(--transition-smooth);}*/
/* ==================== 案例专题 Hero ==================== */
.case-hero {position:relative;min-height:100vh;display:flex;align-items:center;background:var(--primary-dark);overflow:hidden;}
.case-hero::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");}
.hero-grid {max-width:1400px;margin:0 auto;padding:140px 40px 80px;display:grid;grid-template-columns:1.2fr 1fr;gap:80px;align-items:center;position:relative;z-index:2;width:100%;}
.hero-content {position:relative;}
.case-badge {display:inline-flex;align-items:center;gap:10px;color:var(--gold-primary);font-size:0.85rem;letter-spacing:3px;text-transform:uppercase;margin-bottom:24px;padding:8px 20px;border:1px solid rgba(201,169,98,0.3);border-radius:30px;}
.case-badge svg {width:16px;height:16px;}
.case-hero-title {font-size:3.5rem;font-weight:700;color:white;line-height:1.2;margin-bottom:24px;}
.case-hero-title span {color:var(--gold-primary);font-weight:300;display:block;}
.case-hero-desc {font-size:1.15rem;color:rgba(255,255,255,0.7);line-height:1.9;margin-bottom:40px;max-width:540px;}
.case-meta-grid {display:grid;grid-template-columns:repeat(3,1fr);gap:30px;margin-bottom:40px;}
.case-meta-item {border-left:2px solid var(--gold-primary);padding-left:20px;}
.case-meta-label {font-size:0.8rem;color:var(--gold-primary);letter-spacing:1px;text-transform:uppercase;margin-bottom:6px;}
.case-meta-value {font-size:1.1rem;color:white;font-weight:600;}
.hero-visual {position:relative;height:600px;}
.hero-visual-inner {position:relative;width:100%;height:100%;}
.hero-img-main {position:absolute;top:0;right:0;width:85%;height:75%;border-radius:8px;overflow:hidden;box-shadow:0 30px 80px rgba(0,0,0,0.5);z-index:2;}
.hero-img-main img {width:100%;height:100%;object-fit:cover;}
.hero-img-sub {position:absolute;bottom:0;left:0;width:60%;height:50%;border-radius:8px;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,0.4);z-index:3;border:4px solid var(--primary-dark);}
.hero-img-sub img {width:100%;height:100%;object-fit:cover;}
.hero-img-accent {position:absolute;top:20%;left:10%;width:120px;height:120px;border:2px solid var(--gold-primary);border-radius:50%;z-index:1;animation:rotateSlow 20s linear infinite;}
@keyframes rotateSlow {from {transform:rotate(0deg);}
to {transform:rotate(360deg);}
}
.hero-img-accent::before {content:'';position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:80px;height:80px;border:1px solid rgba(201,169,98,0.5);border-radius:50%;}
.scroll-indicator {position:absolute;bottom:40px;left:50%;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;gap:10px;color:rgba(255,255,255,0.5);font-size:0.75rem;letter-spacing:3px;z-index:10;}
.scroll-line {width:1px;height:60px;background:linear-gradient(to bottom,var(--gold-primary),transparent);animation:scrollPulse 2s infinite;}
@keyframes scrollPulse {0%,100% {opacity:1;height:60px;}
50% {opacity:0.3;height:30px;}
}
/* ==================== 概念阐述区 ==================== */
.concept-section {padding:120px 0;background:var(--cream);position:relative;}
.container {max-width:1400px;margin:0 auto;padding:0 40px;}
.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;}
.concept-grid {display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;}
.concept-text {position:relative;}
.concept-quote {font-size:1.3rem;color:var(--primary-dark);line-height:2;font-weight:500;margin-bottom:30px;padding-left:30px;border-left:4px solid var(--gold-primary);}
.concept-body {color:var(--text-gray);line-height:2;font-size:1.05rem;}
.concept-body p {margin-bottom:16px;}
.concept-highlight {display:inline-block;background:linear-gradient(120deg,rgba(201,169,98,0.15) 0%,rgba(201,169,98,0.05) 100%);padding:2px 8px;color:var(--gold-dark);font-weight:600;}
.concept-visual {position:relative;}
.concept-img-wrapper {position:relative;border-radius:8px;overflow:hidden;box-shadow:var(--shadow-elegant);cursor:pointer;transition:var(--transition-smooth);}
.concept-img-wrapper:hover {transform:translateY(-8px);box-shadow:0 30px 80px rgba(0,0,0,0.2);}
.concept-img-wrapper img {width:100%;display:block;transition:transform 0.8s ease;}
.concept-img-wrapper:hover img {transform:scale(1.05);}
.img-overlay {position:absolute;bottom:0;left:0;right:0;padding:30px;background:linear-gradient(to top,rgba(10,10,10,0.8),transparent);color:white;}
.img-overlay-text {font-size:0.9rem;opacity:0.9;}
.zoom-hint {position:absolute;top:20px;right:20px;width:44px;height:44px;background:rgba(255,255,255,0.95);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transform:scale(0.8);transition:var(--transition-smooth);box-shadow:0 4px 15px rgba(0,0,0,0.2);}
.concept-img-wrapper:hover .zoom-hint {opacity:1;transform:scale(1);}
/* ==================== 平面布局与动线 ==================== */
.layout-section {padding:120px 0;background:var(--primary-dark);color:white;position:relative;overflow:hidden;}
.layout-section::before {content:'';position:absolute;top:-30%;right:-20%;width:600px;height:600px;background:radial-gradient(circle,rgba(201,169,98,0.08) 0%,transparent 70%);}
.layout-section .section-title {color:white;}
.layout-section .section-desc {color:rgba(255,255,255,0.6);}
.layout-tabs {display:flex;justify-content:center;gap:20px;margin-bottom:60px;flex-wrap:wrap;}
.layout-tab {padding:14px 36px;background:transparent;border:1px solid rgba(255,255,255,0.15);color:rgba(255,255,255,0.6);font-size:0.95rem;cursor:pointer;transition:var(--transition-smooth);border-radius:4px;letter-spacing:1px;font-family:var(--font-primary);}
.layout-tab:hover,.layout-tab.active {background:var(--gold-primary);color:var(--primary-dark);border-color:var(--gold-primary);font-weight:600;}
.layout-panel {display:none;animation:fadeIn 0.6s ease;}
.layout-panel.active {display:block;}
@keyframes fadeIn {from {opacity:0;transform:translateY(20px);}
to {opacity:1;transform:translateY(0);}
}
.layout-grid {display:grid;grid-template-columns:1.2fr 1fr;gap:60px;align-items:center;}
.layout-img-wrapper {position:relative;border-radius:8px;overflow:hidden;cursor:pointer;box-shadow:0 20px 60px rgba(0,0,0,0.4);}
.layout-img-wrapper img {width:100%;display:block;transition:transform 0.8s ease;}
.layout-img-wrapper:hover img {transform:scale(1.03);}
.layout-info h3 {font-size:1.8rem;margin-bottom:24px;color:white;}
.layout-info h3 span {color:var(--gold-primary);font-weight:300;}
.layout-info p {color:rgba(255,255,255,0.7);line-height:2;margin-bottom:30px;font-size:1.05rem;}
.layout-features {display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.layout-feature {display:flex;align-items:flex-start;gap:16px;padding:20px;background:rgba(255,255,255,0.03);border-radius:8px;border:1px solid rgba(255,255,255,0.05);}
.layout-feature-icon {width:44px;height:44px;background:linear-gradient(135deg,var(--gold-primary),var(--gold-dark));border-radius:8px;display:flex;align-items:center;justify-content:center;color:var(--primary-dark);font-weight:700;flex-shrink:0;font-size:0.9rem;}
.layout-feature-text h4 {color:white;font-size:1rem;margin-bottom:6px;}
.layout-feature-text p {color:rgba(255,255,255,0.5);font-size:0.9rem;line-height:1.6;margin:0;}
/* ==================== 效果图画廊 ==================== */
.gallery-section {padding:120px 0;background:var(--warm-white);}
.gallery-filter {display:flex;justify-content:center;gap:16px;margin-bottom:60px;flex-wrap:wrap;}
.gallery-filter-btn {padding:10px 28px;background:transparent;border:1px solid var(--secondary-dark);color:var(--text-gray);font-size:0.9rem;cursor:pointer;transition:var(--transition-smooth);border-radius:30px;letter-spacing:1px;font-family:var(--font-primary);}
.gallery-filter-btn:hover,.gallery-filter-btn.active {background:var(--primary-dark);color:white;border-color:var(--primary-dark);}
.gallery-masonry {display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.gallery-item {position:relative;border-radius:8px;overflow:hidden;cursor:pointer;background:var(--primary-dark);box-shadow:0 4px 20px rgba(0,0,0,0.08);transition:var(--transition-smooth);}
.gallery-item:hover {transform:translateY(-8px);box-shadow:0 20px 60px rgba(0,0,0,0.2);}
.gallery-item.tall {grid-row:span 2;}
.gallery-item.wide {grid-column:span 2;}
.gallery-item img {width:100%;height:100%;object-fit:cover;display:block;transition:transform 0.8s ease,opacity 0.4s ease;}
.gallery-item:hover img {transform:scale(1.08);opacity:0.85;}
.gallery-item-overlay {position:absolute;bottom:0;left:0;right:0;padding:30px;background:linear-gradient(to top,rgba(10,10,10,0.9) 0%,rgba(10,10,10,0.3) 60%,transparent 100%);transform:translateY(20px);opacity:0;transition:var(--transition-smooth);}
.gallery-item:hover .gallery-item-overlay {transform:translateY(0);opacity:1;}
.gallery-item-title {color:white;font-size:1.1rem;font-weight:600;margin-bottom:6px;}
.gallery-item-desc {color:rgba(255,255,255,0.7);font-size:0.85rem;}
.gallery-zoom {position:absolute;top:20px;right:20px;width:48px;height:48px;background:rgba(255,255,255,0.95);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transform:scale(0.8);transition:var(--transition-smooth);}
.gallery-item:hover .gallery-zoom {opacity:1;transform:scale(1);}
/* ==================== 灯光与科技树方案 ==================== */
.tech-section {padding:120px 0;background:var(--cream);}
.tech-grid {display:grid;grid-template-columns:repeat(2,1fr);gap:40px;}
.tech-card {background:white;border-radius:8px;overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,0.06);transition:var(--transition-smooth);cursor:pointer;}
.tech-card:hover {transform:translateY(-10px);box-shadow:0 25px 70px rgba(0,0,0,0.12);}
.tech-card-img {position:relative;height:320px;overflow:hidden;}
.tech-card-img img {width:100%;height:100%;object-fit:cover;transition:transform 0.8s ease;}
.tech-card:hover .tech-card-img img {transform:scale(1.05);}
.tech-card-body {padding:40px;}
.tech-card-tag {color:var(--gold-primary);font-size:0.8rem;letter-spacing:2px;text-transform:uppercase;font-weight:600;margin-bottom:12px;}
.tech-card-title {font-size:1.5rem;font-weight:700;color:var(--primary-dark);margin-bottom:16px;}
.tech-card-desc {color:var(--text-gray);line-height:1.9;font-size:0.95rem;}
.tech-card-list {margin-top:20px;list-style:none;}
.tech-card-list li {display:flex;align-items:center;gap:10px;padding:10px 0;color:var(--text-gray);font-size:0.95rem;border-bottom:1px solid rgba(0,0,0,0.05);}
.tech-card-list li::before {content:'';width:6px;height:6px;background:var(--gold-primary);border-radius:50%;flex-shrink:0;}
/* ==================== 公司实力 ==================== */
.strength-section {padding:120px 0;background:var(--primary-dark);color:white;position:relative;overflow:hidden;}
.strength-section::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='0.04'%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");}
.strength-section .section-title {color:white;}
.strength-section .section-desc {color:rgba(255,255,255,0.6);}
.strength-grid {display:grid;grid-template-columns:repeat(4,1fr);gap:30px;margin-bottom:80px;}
.strength-card {background:rgba(255,255,255,0.03);border:1px solid rgba(255,255,255,0.06);border-radius:8px;padding:40px 30px;text-align:center;transition:var(--transition-smooth);position:relative;}
.strength-card:hover {background:rgba(255,255,255,0.06);transform:translateY(-8px);border-color:rgba(201,169,98,0.3);}
.strength-icon {width:60px;height:60px;margin:0 auto 24px;background:linear-gradient(135deg,var(--gold-primary),var(--gold-dark));border-radius:12px;display:flex;align-items:center;justify-content:center;color:var(--primary-dark);}
.strength-number {font-size:2.5rem;font-weight:700;color:var(--gold-primary);margin-bottom:8px;line-height:1;}
.strength-label {color:rgba(255,255,255,0.7);font-size:0.95rem;}
.qualification-grid {display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.qualification-item {display:flex;align-items:center;gap:16px;padding:24px;background:rgba(255,255,255,0.03);border-radius:8px;border:1px solid rgba(255,255,255,0.05);transition:var(--transition-smooth);}
.qualification-item:hover {border-color:rgba(201,169,98,0.3);background:rgba(255,255,255,0.05);}
.qualification-icon {width:48px;height:48px;background:rgba(201,169,98,0.1);border-radius:8px;display:flex;align-items:center;justify-content:center;color:var(--gold-primary);flex-shrink:0;}
.qualification-text h4 {color:white;font-size:1rem;margin-bottom:4px;}
.qualification-text p {color:rgba(255,255,255,0.5);font-size:0.85rem;}
/* ==================== CTA区域 ==================== */
.cta-section {padding:120px 0;background:linear-gradient(135deg,var(--primary-dark) 0%,var(--secondary-dark) 100%);position:relative;overflow:hidden;}
.cta-section::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;}
.cta-content {text-align:center;position:relative;z-index:1;max-width:800px;margin:0 auto;}
.cta-title {font-size:3rem;color:white;margin-bottom:24px;font-weight:700;}
.cta-title span {color:var(--gold-primary);}
.cta-desc {color:rgba(255,255,255,0.8);font-size:1.2rem;margin-bottom:50px;line-height:1.8;}
.cta-buttons {display:flex;gap:20px;justify-content:center;flex-wrap:wrap;}
.cta-phone {font-size:2.5rem;color:var(--gold-primary);text-decoration:none;font-weight:700;letter-spacing:2px;display:block;margin-bottom:10px;}
.cta-phone-label {color:rgba(255,255,255,0.6);font-size:0.9rem;letter-spacing:2px;text-transform:uppercase;}
/* ==================== 页脚 ==================== */
/*.footer {background:var(--primary-dark);color:white;padding:80px 0 0;}
.footer-grid {display:grid;grid-template-columns:2fr 1fr 1fr 1.5fr;gap:60px;margin-bottom:60px;}
.footer-brand {max-width:350px;}
.footer-logo {font-size:1.8rem;font-weight:700;color:white;margin-bottom:20px;display:flex;align-items:center;gap:12px;}
.footer-desc {color:rgba(255,255,255,0.6);line-height:1.9;margin-bottom:30px;}
.footer-title {font-size:1.1rem;font-weight:600;margin-bottom:24px;color:white;letter-spacing:1px;}
.footer-links {list-style:none;}
.footer-links li {margin-bottom:14px;}
.footer-links a {color:rgba(255,255,255,0.6);text-decoration:none;transition:var(--transition-smooth);display:flex;align-items:center;gap:10px;}
.footer-links a::before {content:'→';color:var(--gold-primary);opacity:0;transform:translateX(-10px);transition:var(--transition-smooth);}
.footer-links a:hover {color:var(--gold-primary);padding-left:5px;}
.footer-links a:hover::before {opacity:1;transform:translateX(0);}
.footer-contact li {display:flex;gap:16px;margin-bottom:20px;color:rgba(255,255,255,0.7);}
.contact-icon {width:24px;height:24px;color:var(--gold-primary);flex-shrink:0;}
.footer-bottom {border-top:1px solid rgba(255,255,255,0.1);padding:30px 0;display:flex;justify-content:space-between;align-items:center;color:rgba(255,255,255,0.5);font-size:0.9rem;}
.footer-bottom a {color:rgba(255,255,255,0.5);text-decoration:none;transition:var(--transition-smooth);}
.footer-bottom a:hover {color:var(--gold-primary);}*/
/* ==================== 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;}
/* ==================== 大图灯箱 ==================== */
.lightbox {position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(10,10,10,0.95);z-index:9999;display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:all 0.4s ease;padding:40px;}
.lightbox.active {opacity:1;visibility:visible;}
.lightbox-img {max-width:90%;max-height:90%;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-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;color:white;transition:var(--transition-smooth);border:none;}
.lightbox-close:hover {background:var(--gold-primary);color:var(--primary-dark);}
.lightbox-nav {position:absolute;top:50%;transform:translateY(-50%);width:60px;height:60px;background:rgba(255,255,255,0.1);border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;color:white;transition:var(--transition-smooth);border:none;}
.lightbox-nav:hover {background:var(--gold-primary);color:var(--primary-dark);}
.lightbox-prev {left:30px;}
.lightbox-next {right:30px;}
.lightbox-caption {position:absolute;bottom:40px;left:50%;transform:translateX(-50%);color:rgba(255,255,255,0.8);font-size:1rem;text-align:center;max-width:600px;}
/* ==================== 响应式设计 ==================== */
@media (max-width:1200px) {.hero-grid {gap:50px;}
.gallery-masonry {grid-template-columns:repeat(2,1fr);}
.strength-grid {grid-template-columns:repeat(2,1fr);}
.qualification-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);}
.hero-grid {grid-template-columns:1fr;padding-top:120px;}
.case-hero-title {font-size:2.5rem;}
.hero-visual {height:400px;order:-1;}
.concept-grid,.layout-grid,.tech-grid {grid-template-columns:1fr;}
.layout-img-wrapper {order:-1;}
}
@media (max-width:768px) {.case-hero-title {font-size:2rem;}
.case-meta-grid {grid-template-columns:1fr;}
.hero-visual {height:300px;}
.gallery-masonry {grid-template-columns:1fr;}
.gallery-item.wide {grid-column:span 1;}
.gallery-item.tall {grid-row:span 1;}
.strength-grid {grid-template-columns:1fr;}
.qualification-grid {grid-template-columns:1fr;}
.layout-features {grid-template-columns:1fr;}
.section-title {font-size:2rem;}
.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 {width:45px;height:45px;}
.lightbox-prev {left:10px;}
.lightbox-next {right:10px;}
.container {padding:0 20px;}
.concept-section,.layout-section,.gallery-section,.tech-section,.strength-section,.cta-section {padding:60px 0;}
}
@media (max-width:480px) {.case-hero-title {font-size:1.6rem;}
.section-title {font-size:1.6rem;}
.tech-card-img {height:220px;}
.tech-card-body {padding:25px;}
.layout-tab {padding:10px 20px;font-size:0.85rem;}
.gallery-filter-btn {padding:8px 18px;font-size:0.85rem;}
}