/* ==================== 基础变量 ==================== */
/*: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;--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(0,0,0,0.15);}
* {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;background:transparent;}
.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,.nav-link.active {color:var(--gold-primary);}
.nav-link:hover::after,.nav-link.active::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);}
.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);}
.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);}*/
/* ==================== 页面头部（带背景图） ==================== */
.about-hero {background:linear-gradient(135deg,var(--primary-dark) 0%,var(--secondary-dark) 100%);padding:160px 0 80px;margin-top:0;position:relative;overflow:hidden;min-height:600px;display:flex;align-items:center;}
.about-hero::before {content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:url("/2026/banner602.jpg") center/cover;opacity:0.5;}
.about-hero-overlay {position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(to bottom,rgba(10,10,10,0.7) 0%,rgba(10,10,10,0.9) 100%);}
.about-hero-content {position:relative;z-index:1;max-width:1400px;margin:0 auto;padding:0 40px;width:100%;}
/* 面包屑 - 靠左对齐 */
.breadcrumb {margin-bottom:40px;}
.breadcrumb-inner {display:flex;align-items:center;gap:12px;font-size:0.9rem;color:rgba(255,255,255,0.6);justify-content:flex-start;}
.breadcrumb a {color:rgba(255,255,255,0.8);text-decoration:none;display:inline-flex;align-items:center;gap:6px;transition:var(--transition-smooth);}
.breadcrumb a:hover {color:var(--gold-primary);}
.breadcrumb-separator {color:var(--gold-primary);}
.breadcrumb-current {color:var(--gold-primary);}
/* 页面标题区 */
.hero-main {display:grid;grid-template-columns:2fr 1fr;gap:60px;align-items:center;}
.page-title {font-size:3.5rem;font-weight:700;color:white;line-height:1.2;margin-bottom:25px;}
.page-title span {color:var(--gold-primary);font-weight:300;}
.page-subtitle {color:rgba(255,255,255,0.8);font-size:1.2rem;line-height:1.8;margin-bottom:40px;}
/* 快速导航 */
.quick-nav-bar {display:flex;gap:15px;flex-wrap:wrap;}
.quick-nav-item {background:rgba(255,255,255,0.05);color:rgba(255,255,255,0.9);padding:12px 25px;border-radius:4px;text-decoration:none;font-size:0.9rem;font-weight:500;letter-spacing:1px;transition:var(--transition-smooth);border:1px solid rgba(255,255,255,0.1);cursor:pointer;}
.quick-nav-item:hover,.quick-nav-item.active {background:var(--gold-primary);color:var(--primary-dark);border-color:var(--gold-primary);}
/* 头部右侧数据展示 */
.hero-stats-card {background:rgba(255,255,255,0.05);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,0.1);border-radius:12px;padding:40px;text-align:center;}
.hero-stat-number {font-size:4rem;font-weight:700;color:var(--gold-primary);line-height:1;margin-bottom:10px;}
.hero-stat-label {color:rgba(255,255,255,0.8);font-size:1rem;}
/* ==================== 宣传片区域 ==================== */
.video-section {background:var(--cream);padding:100px 0;}
.video-container {max-width:1400px;margin:0 auto;padding:0 40px;}
.section-header {text-align:center;margin-bottom:50px;}
.section-tag {display:inline-block;color:var(--gold-primary);font-size:0.85rem;font-weight:600;letter-spacing:2px;text-transform:uppercase;margin-bottom:15px;}
.section-title {font-size:2.5rem;font-weight:700;color:var(--primary-dark);line-height:1.3;}
.section-title span {color:var(--gold-primary);}
.video-wrapper {position:relative;padding-bottom:56.25%;height:0;overflow:hidden;border-radius:12px;box-shadow:0 30px 80px rgba(0,0,0,0.3);}
.video-placeholder {position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(135deg,var(--primary-dark),var(--secondary-dark));display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;transition:var(--transition-smooth);}
.video-placeholder:hover {background:linear-gradient(135deg,#1a1a1a,#2d2d2d);}
.play-btn {width:100px;height:100px;background:var(--gold-primary);border-radius:50%;display:flex;align-items:center;justify-content:center;margin-bottom:25px;transition:var(--transition-smooth);box-shadow:0 10px 40px rgba(201,169,98,0.4);}
.video-placeholder:hover .play-btn {transform:scale(1.1);}
.play-btn svg {color:var(--primary-dark);margin-left:5px;}
.video-text {color:white;font-size:1.5rem;font-weight:600;}
.video-subtext {color:rgba(255,255,255,0.6);font-size:1rem;margin-top:10px;}
/* ==================== 公司介绍（图文） ==================== */
.about-intro-section {background:white;padding:100px 0;}
.about-container {max-width:1400px;margin:0 auto;padding:0 40px;}
.about-grid {display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;}
.about-content {}
.about-text {color:var(--text-gray);font-size:1.1rem;line-height:2;margin-bottom:20px;}
.about-text strong {color:var(--primary-dark);font-weight:600;}
/* 图片画廊 */
.about-gallery {display:grid;grid-template-columns:repeat(2,1fr);gap:15px;}
.about-img-large {grid-column:span 2;height:300px;border-radius:8px;overflow:hidden;}
.about-img-small {height:180px;border-radius:8px;overflow:hidden;}
.about-gallery img {width:100%;height:100%;object-fit:cover;transition:transform 0.6s ease;}
.about-gallery > div:hover img {transform:scale(1.05);}
/* 核心数据 - PC端 */
.stats-bar {display:grid;grid-template-columns:repeat(4,1fr);gap:30px;margin-top:50px;padding-top:50px;border-top:1px solid var(--cream);}
.stat-item {text-align:center;}
.stat-number {font-size:2.5rem;font-weight:700;color:var(--gold-primary);line-height:1;margin-bottom:8px;}
.stat-label {font-size:0.95rem;color:var(--text-gray);}
/* ==================== 荣誉资质（图片切换） ==================== */
.qualification-section {background:var(--cream);padding:100px 0;}
.qual-main {display:grid;grid-template-columns:2fr 1fr;gap:40px;max-width:1400px;margin:0 auto;padding:0 40px;}
/* 主图展示 */.qual-display {background:white;border-radius:12px;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,0.1);cursor:pointer;}
.qual-main-image {height:500px;background:linear-gradient(135deg,#f8f8f8,#e8e8e8);display:flex;align-items:center;justify-content:center;position:relative;}
.qual-main-image img {max-width:90%;max-height:90%;object-fit:contain;box-shadow:0 10px 40px rgba(0,0,0,0.2);transition:var(--transition-smooth);}
.qual-display:hover .qual-main-image img {transform:scale(1.02);}
.qual-main-title {padding:25px 30px;text-align:center;font-size:1.2rem;font-weight:600;color:var(--primary-dark);border-top:1px solid var(--cream);}
/* 缩略图列表 */
.qual-thumbs {display:flex;flex-direction:column;gap:15px;}
.qual-thumb {display:flex;gap:15px;background:white;padding:15px;border-radius:8px;cursor:pointer;transition:var(--transition-smooth);border:2px solid transparent;}
.qual-thumb:hover,.qual-thumb.active {border-color:var(--gold-primary);box-shadow:0 10px 30px rgba(0,0,0,0.1);}
.qual-thumb-img {width:100px;height:75px;background:linear-gradient(135deg,#f0f0f0,#e0e0e0);border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:2rem;flex-shrink:0;overflow:hidden;}
.qual-thumb-img img {width:100%;height:100%;object-fit:cover;border-radius:6px;}
.qual-thumb-info {flex:1;display:flex;flex-direction:column;justify-content:center;}
.qual-thumb-title {font-size:1rem;font-weight:600;color:var(--primary-dark);margin-bottom:5px;}
.qual-thumb-year {font-size:0.85rem;color:var(--text-light);}
/* ==================== 合作客户（LOGO墙） ==================== */
.partners-section {background:white;padding:100px 0;}
.partners-header {text-align:center;margin-bottom:60px;}
.logo-wall {display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:40px;max-width:1400px;margin:0 auto;padding:0 40px;}
.partner-logo {width:160px;height:80px;background:white;border-radius:8px;display:flex;align-items:center;justify-content:center;transition:var(--transition-smooth);border:1px solid var(--cream);box-shadow:0 4px 15px rgba(0,0,0,0.05);overflow:hidden;padding:10px;}
.partner-logo img {max-width:100%;max-height:100%;object-fit:contain;filter:grayscale(100%);opacity:0.7;transition:var(--transition-smooth);}
.partner-logo:hover {border-color:var(--gold-primary);transform:translateY(-5px);box-shadow:0 15px 40px rgba(0,0,0,0.1);}
.partner-logo:hover img {filter:grayscale(0%);opacity:1;}
/* ==================== 核心团队（图文形式） ==================== */
.team-section {background:var(--cream);padding:100px 0;}
.team-header {text-align:center;margin-bottom:60px;}
.team-grid {display:grid;grid-template-columns:repeat(2,1fr);gap:40px;max-width:1400px;margin:0 auto;padding:0 40px;}
.team-card {display:grid;grid-template-columns:200px 1fr;gap:30px;background:white;border-radius:12px;overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,0.08);transition:var(--transition-smooth);}
.team-card:hover {transform:translateY(-10px);box-shadow:0 20px 60px rgba(0,0,0,0.15);}
.team-photo {height:100%;min-height:250px;background:linear-gradient(135deg,#e8e8e8,#d0d0d0);display:flex;align-items:center;justify-content:center;position:relative;}
.team-photo img {width:100%;height:100%;object-fit:cover;}
.team-avatar {width:100px;height:100px;background:white;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:2.5rem;color:var(--gold-primary);font-weight:700;box-shadow:0 10px 30px rgba(0,0,0,0.2);}
.team-info {padding:35px 30px 35px 0;display:flex;flex-direction:column;justify-content:center;}
.team-name {font-size:1.5rem;font-weight:700;color:var(--primary-dark);margin-bottom:8px;}
.team-position {font-size:1rem;color:var(--gold-primary);font-weight:600;margin-bottom:20px;text-transform:uppercase;letter-spacing:1px;}
.team-desc {font-size:1rem;color:var(--text-gray);line-height:1.8;margin-bottom:20px;}
.team-tags {display:flex;gap:10px;flex-wrap:wrap;}
.team-tag {background:var(--cream);color:var(--text-gray);padding:6px 14px;font-size:0.85rem;border-radius:4px;}
/* ==================== 发展历程（图文时间轴） ==================== */
.history-section {background:white;padding:100px 0;}
.history-header {text-align:center;margin-bottom:60px;}
.history-container {max-width:1400px;margin:0 auto;padding:0 40px;}
/* 横向图文时间轴 */
.history-timeline {display:flex;gap:30px;overflow-x:auto;padding-bottom:30px;scroll-snap-type:x mandatory;}
.history-timeline::-webkit-scrollbar {height:8px;}
.history-timeline::-webkit-scrollbar-track {background:var(--cream);border-radius:4px;}
.history-timeline::-webkit-scrollbar-thumb {background:var(--gold-primary);border-radius:4px;}
.history-item {flex:0 0 350px;scroll-snap-align:start;background:white;border-radius:12px;overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,0.08);transition:var(--transition-smooth);}
.history-item:hover {transform:translateY(-10px);box-shadow:0 20px 60px rgba(0,0,0,0.15);}
.history-image {height:200px;background:linear-gradient(135deg,var(--cream),#e8e8e8);display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;}
.history-image img {width:100%;height:100%;object-fit:cover;}
.history-year-badge {position:absolute;top:15px;left:15px;background:var(--gold-primary);color:var(--primary-dark);padding:8px 16px;font-size:1.2rem;font-weight:700;border-radius:4px;}
.history-content {padding:25px;}
.history-title {font-size:1.2rem;font-weight:700;color:var(--primary-dark);margin-bottom:12px;}
.history-desc {font-size:0.95rem;color:var(--text-gray);line-height:1.7;}
/* 里程碑数据 - PC端 */
.milestone-bar {display:grid;grid-template-columns:repeat(4,1fr);gap:30px;margin-top:60px;padding-top:60px;border-top:1px solid var(--cream);}
.milestone-item {text-align:center;}
.milestone-icon {width:60px;height:60px;background:var(--cream);border-radius:50%;margin:0 auto 15px;display:flex;align-items:center;justify-content:center;font-size:1.8rem;color:var(--gold-primary);transition:all 0.4s cubic-bezier(0.4,0,0.2,1);}
.milestone-item:hover .milestone-icon {background:var(--gold-primary);color:white;transform:scale(1.1);box-shadow:0 10px 30px rgba(201,169,98,0.4);}
.milestone-icon svg {width:28px;height:28px;stroke-width:1.5;}
.milestone-number {font-size:2rem;font-weight:700;color:var(--gold-primary);margin-bottom:5px;}
.milestone-label {font-size:0.95rem;color:var(--text-gray);}
/* ==================== 服务优势（图文卡片） ==================== */
.advantages-section {background:var(--cream);padding:100px 0;}
.advantages-header {text-align:center;margin-bottom:60px;}
.advantages-grid {display:grid;grid-template-columns:repeat(3,1fr);gap:30px;max-width:1400px;margin:0 auto;padding:0 40px;}
.advantage-card {background:white;border-radius:12px;overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,0.08);transition:var(--transition-smooth);}
.advantage-card:hover {transform:translateY(-10px);box-shadow:0 20px 60px rgba(0,0,0,0.15);}
.advantage-image {height:200px;background:linear-gradient(135deg,var(--primary-dark),var(--secondary-dark));display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;}
.advantage-image img {width:100%;height:100%;object-fit:cover;opacity:0.8;}
.advantage-content {padding:30px;}
.advantage-title {font-size:1.3rem;font-weight:700;color:var(--primary-dark);margin-bottom:15px;}
.advantage-desc {font-size:1rem;color:var(--text-gray);line-height:1.8;}
/* ==================== 联系我们CTA ==================== */
.contact-cta-section {background:linear-gradient(135deg,var(--primary-dark),var(--secondary-dark));padding:100px 0;text-align:center;position:relative;overflow:hidden;}
.contact-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;}
.contact-cta-content {position:relative;z-index:1;}
.contact-cta-title {font-size:2.5rem;font-weight:700;color:white;margin-bottom:20px;}
.contact-cta-title span {color:var(--gold-primary);}
.contact-cta-desc {color:rgba(255,255,255,0.8);font-size:1.2rem;margin-bottom:40px;}
.contact-cta-btns {display:flex;justify-content:center;gap:20px;flex-wrap:wrap;}
/* ==================== 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;max-width:1400px;margin:0 auto;padding:0 40px 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 40px;display:flex;justify-content:space-between;align-items:center;color:rgba(255,255,255,0.5);font-size:0.9rem;max-width:1400px;margin:0 auto;}
.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;}*/
/* ==================== 证书灯箱 ==================== */
.cert-lightbox {display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(10,10,10,0.95);z-index:10000;justify-content:center;align-items:center;}
.cert-lightbox.active {display:flex;}
.cert-lightbox img {max-width:90%;max-height:90%;object-fit:contain;}
.cert-lightbox-close {position:absolute;top:30px;right:30px;width:50px;height:50px;background:rgba(255,255,255,0.1);border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:var(--transition-smooth);color:white;}
.cert-lightbox-close:hover {background:var(--gold-primary);color:var(--primary-dark);}
/* ==================== 响应式设计 ==================== */
@media (max-width:1200px) {.hero-main {grid-template-columns:1fr;text-align:center;}
.hero-stats-card {display:none;}
.quick-nav-bar {justify-content:center;}
.about-grid {grid-template-columns:1fr;}
.qual-main {grid-template-columns:1fr;}
.qual-thumbs {flex-direction:row;overflow-x:auto;}
.team-grid {grid-template-columns:1fr;}
.team-card {grid-template-columns:150px 1fr;}
.advantages-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);}
.page-title {font-size:2.5rem;}
.stats-bar {grid-template-columns:repeat(2,1fr);}
.logo-wall {gap:20px;}
.partner-logo {width:140px;height:70px;}
.history-item {flex:0 0 300px;}
}
/* ==================== 手机端优化（768px及以下） ==================== */
@media (max-width:768px) {.about-hero {padding:140px 0 60px;min-height:auto;}
.page-title {font-size:2rem;}
.breadcrumb-inner {justify-content:flex-start;}
.quick-nav-item {padding:10px 18px;font-size:0.85rem;}
.video-container {padding:0 20px;}
.about-container {padding:0 20px;}
.about-gallery {grid-template-columns:1fr;}
.about-img-large {grid-column:span 1;height:220px;}
.play-btn {width:60px;height:60px;background:var(--gold-primary);border-radius:50%;display:flex;align-items:center;justify-content:center;margin-bottom:5px;transition:var(--transition-smooth);box-shadow:0 10px 40px rgba(201,169,98,0.4);}
.video-section {background:var(--cream);padding:30px 0;}
.about-intro-section {background:white;padding:50px 0;}
.partners-section {background:white;padding:50px 0;}
.qualification-section {background:var(--cream);padding:50px 0;}
.team-section {background:var(--cream);padding:50px 0;}
.history-section {background:white;padding:50px 0;}
.advantages-section {background:var(--cream);padding:50px 0;}
.contact-cta-section {background:linear-gradient(135deg,var(--primary-dark),var(--secondary-dark));padding:50px 0;text-align:center;position:relative;overflow:hidden;}
/* 核心数据区域 - 手机端改为2列 */    
.stats-bar {grid-template-columns:repeat(2,1fr);gap:25px;margin-top:40px;padding-top:40px;}
.stat-item {padding:15px;background:var(--cream);border-radius:8px;}
.stat-number {font-size:2rem;}
.stat-label {font-size:0.85rem;}
/* 资质荣誉区域 - 手机端优化 */    
.qual-main {padding:0 20px;}
.qual-main-image {height:300px;}
.qual-main-title {padding:15px 20px;font-size:1rem;}
/* 手机端缩略图改为网格布局，只显示图片 */    
.qual-thumbs {display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:15px;}
.qual-thumb {flex-direction:column;padding:8px;gap:0;}
.qual-thumb-img {width:100%;height:80px;}
/* 手机端隐藏缩略图文字信息 */    
.qual-thumb-info {display:none;}
.qual-thumb.active {border-color:var(--gold-primary);box-shadow:0 4px 15px rgba(201,169,98,0.3);}
.team-card {grid-template-columns:1fr;}
.team-photo {height:200px;}
.team-info {padding:25px;}
.advantages-grid {grid-template-columns:1fr;padding:0 20px;}
.history-timeline {gap:20px;}
.history-item {flex:0 0 280px;}
/* 里程碑区域 - 手机端改为2列 */    
.milestone-bar {grid-template-columns:repeat(2,1fr);gap:25px;margin-top:40px;padding-top:40px;}
.milestone-item {padding:20px 15px;background:var(--cream);border-radius:8px;}
.milestone-icon {width:50px;height:50px;margin-bottom:12px;}
.milestone-icon svg {width:24px;height:24px;}
.milestone-number {font-size:1.8rem;}
.milestone-label {font-size:0.85rem;}
.contact-cta-title {font-size:1.8rem;}
/* 页脚区域 - 手机端服务范围与服务城市并列 */    
.footer-grid {grid-template-columns:1fr;gap:40px;padding:0 20px 40px;}
/* 服务范围和服务城市并列显示 */    
.footer-grid > div:nth-child(2),.footer-grid > div:nth-child(3) {display:inline-block;width:48%;vertical-align:top;}
.footer-grid > div:nth-child(2) {margin-right:4%;}
.footer-title {font-size:1rem;margin-bottom:16px;}
.footer-links li {margin-bottom:10px;}
/*.footer-links a {font-size:0.9rem;}*/
.footer-bottom {flex-direction:column;gap:15px;text-align:center;padding:20px;}
.float-cta {right:15px;bottom:80px;}
.float-btn {width:50px;height:50px;font-size:1.2rem;}
}
@media (max-width:480px) {.page-title {font-size:1.6rem;}
.section-title {font-size:1.8rem;}
/* 核心数据区域 - 小屏幕保持2列但调整间距 */    
.stats-bar {grid-template-columns:repeat(2,1fr);gap:15px;}
.stat-number {font-size:1.8rem;}
.stat-label {font-size:0.8rem;}
.partner-logo {width:120px;height:60px;}
.history-item {flex:0 0 260px;}
/* 里程碑区域 - 小屏幕保持2列 */    
.milestone-bar {grid-template-columns:repeat(2,1fr);gap:15px;}
.milestone-number {font-size:1.6rem;}
.milestone-label {font-size:0.8rem;}
/* 页脚 - 超小屏幕改为单列 */    
.footer-grid > div:nth-child(2),.footer-grid > div:nth-child(3) {display:block;width:100%;margin-right:0;}
}