/* ============ 北京渠锐科技 - 工业风样式表 ============ */
/* 主色调：深蓝 #0D47A1  辅助色：深灰 #666  背景：#fff, #F0F4F8 */
/* 字体：思源黑体 / 系统字体栈 */
/* 圆角：4px  风格：沉稳工业、专业实业感 */

/* ==================== Reset & Base ==================== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;color:#222;background:#fff;line-height:1.7;overflow-x:hidden}
a{color:#0D47A1;text-decoration:none;transition:color 0.2s}
a:hover{color:#0A2E5C}
img{max-width:100%;height:auto;display:block}
ul{list-style:none}
input,textarea,select,button{font-family:inherit;font-size:inherit}
button{cursor:pointer;border:none;background:none}

.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:60px 0}
.section-title{font-size:28px;font-weight:700;color:#0D47A1;text-align:center;margin-bottom:10px}
.section-subtitle{font-size:16px;color:#556B82;text-align:center;margin-bottom:40px}
.section-line{width:60px;height:3px;background:#0D47A1;margin:0 auto 15px;border-radius:2px}

/* ==================== Header / Navigation ==================== */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;background:#fff;box-shadow:0 2px 10px rgba(0,0,0,0.08);transition:transform 0.3s}
.header-container{display:flex;align-items:center;justify-content:space-between;height:100px}
.logo{flex-shrink:0;margin-right:20px}
.logo-img{height:84px;width:auto}
.main-nav{flex:1}
.nav-list{display:flex;align-items:center;gap:5px}
.nav-link{display:block;padding:8px 14px;font-size:15px;color:#222;border-radius:4px;white-space:nowrap;transition:all 0.2s}
.nav-link:hover,.nav-link.active{color:#0D47A1;background:#E3ECF3}
.nav-link .nav-arrow{font-size:10px;margin-left:3px}
.dropdown{position:relative}
.dropdown-menu{display:none;position:absolute;top:100%;left:0;min-width:200px;background:#fff;box-shadow:0 4px 15px rgba(0,0,0,0.12);border-radius:0 0 4px 4px;padding:8px 0;z-index:1001}
.dropdown:hover .dropdown-menu{display:block}
.dropdown-menu a{display:block;padding:10px 20px;font-size:14px;color:#222;transition:all 0.2s}
.dropdown-menu a:hover{color:#0D47A1;background:#E3ECF3}

.header-right{display:flex;align-items:center;gap:25px;flex-shrink:0}
.header-contact{display:flex;align-items:center;gap:8px;padding:6px 14px;border-radius:8px;white-space:nowrap;transition:all 0.25s;border:1px solid #E3ECF3}
.header-contact:hover{border-color:#C5D3F7;background:#F8FAFF}
.header-contact .contact-icon{flex-shrink:0;color:#0D47A1;width:16px;height:16px}
.header-contact .contact-text{display:flex;flex-direction:column;line-height:1.3}
.header-contact .contact-label{font-size:10px;color:#556B82;letter-spacing:0.5px}
.header-contact .contact-phone{color:#1A1A2E;font-weight:700;font-size:14px;letter-spacing:0.3px}
.header-contact .contact-phone:hover{color:#0D47A1}


.mobile-menu-btn{display:none;flex-direction:column;gap:5px;padding:8px;cursor:pointer}
.mobile-menu-btn span{display:block;width:24px;height:2px;background:#333;border-radius:1px;transition:all 0.3s}
.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(5px,-5px)}

/* NAV overlay */
.nav-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,0.4);z-index:999}

/* ==================== Main Content Area ==================== */
.site-main{margin-top:100px}
.page-header{padding:30px 0;background:#F0F4F8;text-align:center}
.page-header h1{font-size:28px;color:#0D47A1;font-weight:700}

/* Breadcrumb */
.breadcrumb{padding:12px 0;background:#fafafa;border-bottom:1px solid #eee;font-size:13px;color:#556B82}
.breadcrumb a{color:#556B82}
.breadcrumb a:hover{color:#0D47A1}
.breadcrumb-sep{margin:0 6px;color:#ccc}
.breadcrumb .current{color:#0D47A1}

/* ==================== Home Page ==================== */
/* Banner */
.home-banner{position:relative;height:560px;background:linear-gradient(135deg,#0D47A1 0%,#1565C0 50%,#2196F3 100%);display:flex;align-items:center;overflow:hidden}
.banner-bg{display:none}
.banner-content{position:relative;z-index:1;color:#fff;max-width:800px;padding:0 20px}
.banner-content h1{font-size:38px;font-weight:700;line-height:1.3;margin-bottom:15px}
.banner-content .banner-sub{font-size:20px;margin-bottom:15px;opacity:0.9}
.banner-content .banner-desc{font-size:16px;line-height:1.8;opacity:0.85;margin-bottom:25px}
.banner-btns{display:flex;gap:15px;flex-wrap:wrap}
.banner-btns .btn{display:inline-flex;align-items:center;gap:6px;padding:12px 28px;border-radius:4px;font-size:15px;font-weight:500;transition:all 0.2s}
.btn-primary{background:#fff;color:#0D47A1}
.btn-primary:hover{background:#E3ECF3;color:#0D47A1}
.btn-outline{background:transparent;color:#fff;border:1px solid #2196F3}
.btn-outline:hover{background:#2196F3;color:#fff}


/* Company intro section */
.company-intro-section{padding:70px 0;background:#fff}
.intro-head{margin-bottom:10px}
.intro-head-tag{display:inline-block;font-size:13px;color:#0D47A1;font-weight:600;letter-spacing:4px;margin-bottom:14px;padding-bottom:8px;border-bottom:2px solid #0D47A1}

.intro-wrapper{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}

/* 左侧文字区 */
.intro-text-col{}
.intro-lede{font-size:16px;color:#222;line-height:1.9;margin-bottom:16px;font-weight:500}
.intro-body{font-size:15px;color:#556B82;line-height:1.9;margin-bottom:32px}

/* 数据统计 */
.intro-stats-row{display:flex;gap:40px;margin-bottom:32px;padding:24px 0;border-top:1px solid #E3ECF3;border-bottom:1px solid #E3ECF3}
.intro-stat{text-align:center}
.intro-stat strong{display:block;font-size:36px;font-weight:700;color:#0D47A1;line-height:1.2}
.intro-stat strong span{font-size:18px;font-weight:400;margin-left:2px}
.intro-stat small{display:block;font-size:13px;color:#556B82;margin-top:4px}

/* 按钮 */
.intro-action-row{margin-top:0}

/* 右侧图片区 */
.intro-img-col{display:flex;justify-content:center;align-items:center}
.intro-img-frame{background:#F0F4F8;border-radius:6px;padding:12px;display:flex;align-items:center;justify-content:center;border:1px solid #CDD8E3;width:100%;height:100%;min-height:380px;overflow:hidden}
.intro-img-frame img{width:100%;height:100%;max-width:100%;max-height:100%;object-fit:cover;border-radius:4px}

/* Product cards */
.product-cards-section{padding:60px 0;background:#F0F4F8}
.product-cards-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px}
.product-card{background:#fff;border-radius:4px;overflow:hidden;box-shadow:0 2px 10px rgba(0,0,0,0.06);transition:transform 0.3s,box-shadow 0.3s;border:1px solid transparent}
.product-card:hover{transform:translateY(-4px);box-shadow:0 6px 20px rgba(230,81,0,0.15);border-color:#2196F3}
.product-card-img{aspect-ratio:16/10;background:#CDD8E3;overflow:hidden;position:relative}
.product-card-img img{width:100%;height:100%;object-fit:cover}
.product-card-body{padding:20px}
.product-card-body h3{font-size:17px;color:#0D47A1;margin-bottom:8px;font-weight:600}
.product-card-body p{font-size:13px;color:#556B82;line-height:1.7}
.product-card-body .card-meta{margin-top:12px;display:flex;gap:15px;font-size:12px;color:#999}
.product-card-body .card-meta span{display:flex;align-items:center;gap:4px}

/* Case cards */
.case-cards-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px}
.case-card{background:#fff;border-radius:4px;overflow:hidden;box-shadow:0 2px 10px rgba(0,0,0,0.06);transition:transform 0.3s}
.case-card:hover{transform:translateY(-4px);box-shadow:0 6px 20px rgba(0,0,0,0.1)}
.case-card-img{aspect-ratio:4/3;background:#CDD8E3;overflow:hidden}
.case-card-img img{width:100%;height:100%;object-fit:cover}
.case-card-body{padding:18px}
.case-card-body .case-cat{display:inline-block;padding:2px 10px;background:#E3ECF3;color:#0D47A1;font-size:12px;border-radius:2px;margin-bottom:8px}
.case-card-body h3{font-size:16px;color:#222;margin-bottom:6px;font-weight:600}
.case-card-body p{font-size:13px;color:#556B82}

/* Advantages */
.advantages-section{padding:60px 0}
.advantages-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px}
.advantage-card{text-align:center;padding:30px 20px;background:#fff;border-radius:4px;box-shadow:0 2px 10px rgba(0,0,0,0.06);transition:transform 0.2s}
.advantage-card:hover{transform:translateY(-3px)}
.advantage-icon{width:60px;height:60px;margin:0 auto 15px;background:#E3ECF3;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#0D47A1}
.advantage-card h3{font-size:17px;color:#0D47A1;margin-bottom:8px}
.advantage-card p{font-size:13px;color:#556B82;line-height:1.7}

/* Quick links */
.quick-links-section{padding:50px 0;background:#0D47A1}
.quick-links-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.quick-link-card{display:flex;align-items:center;gap:12px;padding:20px;background:rgba(255,255,255,0.1);border-radius:4px;color:#fff;transition:background 0.3s;text-decoration:none}
.quick-link-card:hover{background:rgba(255,255,255,0.2);color:#fff}
.quick-link-icon{flex-shrink:0;width:44px;height:44px;background:rgba(255,255,255,0.15);border-radius:4px;display:flex;align-items:center;justify-content:center}
.quick-link-text{font-size:15px;font-weight:500}
.quick-link-arrow{margin-left:auto;opacity:0.6}

/* Contact banner */
.contact-banner-section{padding:50px 0;background:linear-gradient(135deg,#0D47A1 0%,#1565C0 100%);color:#fff;text-align:center}
.contact-banner-section h2{font-size:26px;margin-bottom:10px}
.contact-banner-section p{margin-bottom:20px;opacity:0.85}
.contact-banner-section .phone-large{font-size:32px;font-weight:700;letter-spacing:2px;position:relative;display:inline-block}
.contact-banner-section .phone-large::after{content:'';position:absolute;left:50%;bottom:-6px;transform:translateX(-50%);width:60px;height:3px;background:#2196F3;border-radius:2px}

/* ==================== Side Contact Bar ==================== */
.side-contact{position:fixed;right:10px;top:50%;transform:translateY(-50%);z-index:900;display:flex;flex-direction:column;gap:6px}
.side-item{position:relative}
.side-link{display:flex;align-items:center;gap:8px;padding:10px 14px;background:#F0F4F8;border-radius:4px;box-shadow:0 2px 8px rgba(0,0,0,0.1);cursor:pointer;transition:all 0.2s;color:#222;text-decoration:none;white-space:nowrap}
.side-link:hover{background:#E3ECF3;color:#0D47A1;box-shadow:0 3px 12px rgba(26,26,26,0.2)}
.side-item:last-child .side-link{background:#2196F3;color:#fff}
.side-item:last-child .side-link:hover{background:#1565C0;color:#fff;box-shadow:0 3px 12px rgba(230,81,0,0.3)}
.side-icon{display:flex;align-items:center;justify-content:center;width:22px;height:22px;flex-shrink:0}
.side-text{font-size:13px;line-height:1.4}

.wechat-qr-popup{display:none;position:absolute;right:110%;top:50%;transform:translateY(-50%);z-index:901}
.wechat-qr-popup.active{display:block}
.qr-box{background:#fff;padding:15px;border-radius:4px;box-shadow:0 4px 20px rgba(0,0,0,0.15);text-align:center}
.qr-placeholder{width:120px;height:120px;margin:0 auto 8px;border-radius:4px;overflow:hidden}
.qr-text{font-size:12px;color:#556B82}

/* ==================== List Pages ==================== */
.list-header{padding:30px 0;background:#F0F4F8}
.list-header h1{font-size:28px;color:#0D47A1;text-align:center}

.list-toolbar{display:flex;justify-content:space-between;align-items:center;padding:20px 0;flex-wrap:wrap;gap:10px}
.list-categories{display:flex;gap:8px;flex-wrap:wrap}
.list-cat-btn{padding:8px 18px;border:1px solid #d0d5dd;border-radius:4px;font-size:13px;color:#556B82;transition:all 0.2s;cursor:pointer;text-decoration:none}
.list-cat-btn:hover,.list-cat-btn.active{border-color:#0D47A1;color:#0D47A1;background:#E3ECF3}

.list-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px;padding-bottom:40px}

/* Pagination */
.pagination{display:flex;justify-content:center;align-items:center;gap:5px;padding:20px 0 50px}
.pagination a,.pagination span{display:inline-flex;align-items:center;justify-content:center;min-width:36px;height:36px;padding:0 10px;border:1px solid #d0d5dd;border-radius:4px;font-size:13px;color:#556B82;transition:all 0.2s;text-decoration:none}
.pagination a:hover{border-color:#0D47A1;color:#0D47A1}
.pagination .active{background:#0D47A1;color:#fff;border-color:#0D47A1}

/* ==================== Detail Pages ==================== */
.detail-page{padding:40px 0}
.detail-layout{margin-bottom:40px}
.detail-layout::after{content:'';display:table;clear:both}
.detail-main-img{float:right;width:380px;margin:0 0 20px 40px;aspect-ratio:16/10;background:#CDD8E3;border-radius:8px;overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,0.08);position:relative}
.detail-main-img img{width:100%;height:100%;object-fit:cover}
.detail-info{}
.detail-info h1{font-size:28px;color:#0D47A1;margin-bottom:6px;font-weight:700}
.detail-info .detail-meta{font-size:13px;color:#999;margin-bottom:18px;display:flex;gap:15px}
.detail-info .detail-desc{font-size:15px;color:#444;line-height:2}

/* AI long-tail descriptions */
.ai-descriptions{margin-top:30px;padding:20px;background:#f8fafd;border-left:3px solid #0D47A1;border-radius:0 4px 4px 0}
.ai-descriptions h4{font-size:15px;color:#0D47A1;margin-bottom:12px}
.ai-descriptions ul{list-style:disc;padding-left:20px}
.ai-descriptions li{font-size:14px;color:#444;line-height:1.8;margin-bottom:6px}

/* Tech params table */
.tech-params{margin:30px 0}
.tech-params h3{font-size:20px;color:#0D47A1;margin-bottom:15px}
.tech-table{width:100%;border-collapse:collapse;font-size:14px}
.tech-table th,.tech-table td{padding:12px 15px;border:1px solid #CDD8E3;text-align:left}
.tech-table th{background:#F0F4F8;color:#0D47A1;font-weight:600;width:180px}
.tech-table td{color:#444}

/* Applicable industries */
.applicable-info{margin:30px 0}
.applicable-info h3{font-size:20px;color:#0D47A1;margin-bottom:15px}
.applicable-tags{display:flex;gap:10px;flex-wrap:wrap}
.applicable-tag{padding:6px 14px;background:#E3ECF3;color:#0D47A1;border-radius:4px;font-size:13px}

/* Product images gallery */
.product-gallery{margin-top:30px}
.product-gallery h3{font-size:20px;color:#0D47A1;margin-bottom:15px}
.gallery-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}
.gallery-item{aspect-ratio:4/3;background:#CDD8E3;border-radius:4px;overflow:hidden;cursor:pointer;position:relative}
.gallery-item img{width:100%;height:100%;object-fit:cover}
.gallery-item:hover{opacity:0.85}

/* AI Recommendations */
.ai-recommendations{margin-top:50px;padding:40px 0;border-top:1px solid #eee}
.ai-recommendations h3{font-size:22px;color:#0D47A1;text-align:center;margin-bottom:5px}
.ai-recommendations .section-subtitle{font-size:14px}
.rec-items-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:25px}
.rec-item{background:#fff;border-radius:4px;overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,0.06);transition:transform 0.2s}
.rec-item:hover{transform:translateY(-3px)}
.rec-item-img{aspect-ratio:16/10;background:#CDD8E3;overflow:hidden}
.rec-item-img img{width:100%;height:100%;object-fit:cover}
.rec-item-body{padding:12px}
.rec-item-body h4{font-size:14px;color:#222}

/* ==================== About Page ==================== */
.about-section{padding:50px 0}
.about-grid{display:block}
.about-intro h2{font-size:26px;color:#0D47A1;margin-bottom:15px}
.about-intro p{font-size:15px;line-height:1.9;color:#444;margin-bottom:12px}
.about-image{border-radius:8px;overflow:hidden;box-shadow:0 8px 30px rgba(26,26,26,0.15);max-width:300px;width:100%;margin:0 auto}
.about-image img{width:100%;height:auto;display:block}

.culture-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;margin-top:40px}
.culture-item{text-align:center;padding:25px 20px;background:#F0F4F8;border:1px solid #CDD8E3;border-radius:4px;transition:box-shadow 0.2s}
.culture-item:hover{box-shadow:0 4px 15px rgba(0,0,0,0.08)}
.culture-icon{margin-bottom:12px;color:#0D47A1}
.culture-item h4{font-size:16px;color:#0D47A1;margin-bottom:8px}
.culture-item p{font-size:13px;color:#556B82}

.strength-section{padding:60px 0;background:#F0F4F8}
.strength-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:30px}
.strength-card{display:flex;gap:20px;align-items:flex-start;padding:25px;background:#fff;border-radius:4px;box-shadow:0 2px 10px rgba(0,0,0,0.04)}
.strength-card-icon{flex-shrink:0;width:50px;height:50px;background:#E3ECF3;border-radius:4px;display:flex;align-items:center;justify-content:center;color:#0D47A1}
.strength-card h4{font-size:16px;color:#0D47A1;margin-bottom:6px}
.strength-card p{font-size:13px;color:#556B82;line-height:1.7}

/* ==================== 发展历程 ==================== */
.dev-history{padding:60px 0;background:#F0F4F8}
.history-list{display:grid;grid-template-columns:repeat(2,1fr);gap:28px;margin-top:40px}
.history-card{background:#fff;border-radius:4px;padding:26px;box-shadow:0 1px 6px rgba(0,0,0,0.05);transition:box-shadow .2s}
.history-card:hover{box-shadow:0 5px 18px rgba(0,0,0,0.08)}
.history-card-icon{width:48px;height:48px;background:#E3ECF3;border-radius:4px;display:flex;align-items:center;justify-content:center;color:#0D47A1;margin-bottom:14px;flex-shrink:0}
.history-card h4{font-size:16px;color:#0D47A1;margin-bottom:8px;font-weight:700}
.history-card p{font-size:13.5px;color:#556B82;line-height:1.75}

/* ==================== Contact Page ==================== */
.contact-page{padding:40px 0}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:stretch}
.contact-info-block{padding:30px;background:#F0F4F8;border-radius:4px;display:flex;flex-direction:column;height:100%}
.contact-info-block h3{font-size:20px;color:#0D47A1;margin-bottom:20px}
.contact-info-item{display:flex;gap:12px;margin-bottom:18px;align-items:flex-start}
.contact-info-item svg{flex-shrink:0;margin-top:3px;color:#0D47A1}
.contact-info-item strong{display:block;color:#222;margin-bottom:3px}
.contact-info-item p{font-size:14px;color:#556B82}
.contact-map{margin-top:auto;border-radius:4px;overflow:hidden;height:300px;background:#CDD8E3;display:flex;align-items:center;justify-content:center;color:#999}
.contact-map iframe{width:100%;height:100%;border:none}

.contact-form-block{padding:30px;background:#F0F4F8;border:1px solid #CDD8E3;border-radius:4px;display:flex;flex-direction:column;height:100%}
.contact-form-block h3{font-size:20px;color:#0D47A1;margin-bottom:25px}
.contact-form-block form{flex:1;display:flex;flex-direction:column}
.contact-form-block .form-submit{margin-top:auto}

/* ==================== AI Q&A Page ==================== */
.qa-page{padding:40px 0}
.qa-categories{display:flex;gap:10px;margin-bottom:30px;flex-wrap:wrap;justify-content:center}
.qa-cat-btn{padding:10px 22px;border:1px solid #d0d5dd;border-radius:4px;font-size:14px;color:#556B82;cursor:pointer;transition:all 0.2s;text-decoration:none}
.qa-cat-btn:hover,.qa-cat-btn.active{border-color:#0D47A1;color:#0D47A1;background:#E3ECF3}

.qa-list{max-width:800px;margin:0 auto}
.qa-item{background:#F0F4F8;border:1px solid #CDD8E3;border-radius:4px;margin-bottom:12px;overflow:hidden}
.qa-question{padding:16px 20px;display:flex;justify-content:space-between;align-items:center;cursor:pointer;font-weight:500;color:#222;font-size:15px;transition:background 0.2s}
.qa-question:hover{background:#f8fafd}
.qa-question .qa-arrow{color:#0D47A1;transition:transform 0.3s;font-size:12px}
.qa-item.open .qa-arrow{transform:rotate(180deg)}
.qa-answer{display:none;padding:0 20px 20px;font-size:14px;color:#444;line-height:1.9}
.qa-item.open .qa-answer{display:block}

/* ==================== Search Results ==================== */
.search-page{padding:40px 0}
.search-header{margin-bottom:30px;text-align:center}
.search-header h1{font-size:24px;color:#0D47A1;margin-bottom:10px}
.search-query{color:#0A2E5C}
.result-section{margin-bottom:30px}
.result-section h3{font-size:18px;color:#0D47A1;margin-bottom:15px;padding-bottom:8px;border-bottom:1px solid #eee}
.result-list{display:flex;flex-direction:column;gap:12px}
.result-item{padding:15px 20px;background:#F0F4F8;border:1px solid #CDD8E3;border-radius:4px;transition:box-shadow 0.2s;display:flex;gap:15px;align-items:flex-start}
.result-item:hover{box-shadow:0 2px 10px rgba(0,0,0,0.06);border-color:#0D47A1}
.result-item .result-type{display:inline-block;padding:2px 8px;background:#E3ECF3;color:#0D47A1;font-size:11px;border-radius:2px;flex-shrink:0;margin-top:2px}
.result-item .result-content{flex:1}
.result-item .result-title{font-size:15px;color:#222;display:block;margin-bottom:4px;font-weight:500}
.result-item .result-title:hover{color:#0D47A1}
.result-item .result-summary{font-size:13px;color:#999}

.no-results{text-align:center;padding:60px 20px;color:#999}
.no-results svg{margin-bottom:15px}

/* ==================== 404 Page ==================== */
.error-page{text-align:center;padding:100px 20px}
.error-page h1{font-size:100px;color:#0D47A1;line-height:1;margin-bottom:10px;font-weight:200}
.error-page h2{font-size:24px;color:#222;margin-bottom:15px}
.error-page p{color:#556B82;margin-bottom:30px}
.error-page .btn{padding:10px 24px;background:#0D47A1;color:#fff;border-radius:4px;text-decoration:none;display:inline-block;transition:background 0.2s}
.error-page .btn:hover{background:#0A2E5C;color:#fff}

/* ==================== Form Styles ==================== */
.form-group{margin-bottom:18px}
.form-group label{display:block;margin-bottom:6px;font-size:14px;color:#222;font-weight:500}
.form-group label .required{color:#e74c3c;margin-left:2px}
.form-input,.form-textarea,.form-select{width:100%;padding:10px 14px;border:1px solid #d0d5dd;border-radius:4px;font-size:14px;color:#222;outline:none;transition:border-color 0.2s;background:#fff}
.form-input:focus,.form-textarea:focus,.form-select:focus{border-color:#0D47A1}
.form-textarea{min-height:120px;resize:vertical}
.form-submit{padding:12px 30px;background:#0D47A1;color:#fff;border:none;border-radius:4px;font-size:15px;font-weight:500;cursor:pointer;transition:background 0.2s}
.form-submit:hover{background:#0A2E5C}
.captcha-row{display:flex;gap:10px;align-items:center}
.captcha-row .form-input{flex:1}
.captcha-img{height:42px;width:120px;background:#CDD8E3;border-radius:4px;display:flex;align-items:center;justify-content:center;font-size:18px;color:#556B82;letter-spacing:3px;font-family:monospace}
.form-msg{padding:12px;border-radius:4px;font-size:14px;margin-bottom:15px;display:none}
.form-msg.success{display:block;background:#d4edda;color:#155724;border:1px solid #c3e6cb}
.form-msg.error{display:block;background:#f8d7da;color:#721c24;border:1px solid #f5c6cb}

/* ==================== Footer ==================== */
.site-footer{background:#0D47A1;color:#ccc;margin-top:-1px}
.footer-main{display:grid;grid-template-columns:1.3fr 0.8fr 0.8fr 1.1fr;gap:40px;padding:50px 20px}
.footer-col h3{color:#fff;font-size:17px;margin-bottom:18px;font-weight:600}
.footer-col p{font-size:14px;line-height:1.8;margin-bottom:8px}
.footer-col ul li{margin-bottom:8px}
.footer-col ul li a{color:#aaa;font-size:14px;transition:color 0.2s}
.footer-col ul li a:hover{color:#fff}
.footer-col strong{color:#ddd;font-weight:500}
.footer-business{font-size:13px;color:#888;margin-top:10px}
.footer-bottom{background:#081F3E;padding:15px 0;text-align:center;font-size:13px;color:#888}
.footer-bottom a{color:#aaa}
.footer-bottom a:hover{color:#fff}
.footer-links-bot{margin-top:5px;font-size:12px}

/* Back to top */
.back-to-top{display:none;position:fixed;right:20px;bottom:40px;z-index:800;width:40px;height:40px;background:#0D47A1;color:#fff;border-radius:4px;box-shadow:0 2px 8px rgba(0,0,0,0.15);transition:all 0.3s;align-items:center;justify-content:center}
.back-to-top:hover{background:#0A2E5C;transform:translateY(-2px)}
.back-to-top.visible{display:flex}

/* Loading */
.page-loading{position:fixed;inset:0;background:#fff;z-index:9999;display:none;align-items:center;justify-content:center}
.page-loading.active{display:flex}
.loading-spinner{width:40px;height:40px;border:3px solid #CDD8E3;border-top-color:#0D47A1;border-radius:50%;animation:spin 0.8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ==================== Responsive: Tablet ==================== */
@media (max-width: 1024px) {
    .footer-main{grid-template-columns:1fr 1fr;gap:30px}
    .product-cards-grid,.case-cards-grid,.list-grid{grid-template-columns:repeat(2,1fr)}
    .advantages-grid{grid-template-columns:repeat(2,1fr)}
    .quick-links-grid{grid-template-columns:repeat(2,1fr)}
    .intro-grid,.detail-layout,.contact-grid{grid-template-columns:1fr;gap:30px}
    .strength-grid{grid-template-columns:1fr}
    .rec-items-grid{grid-template-columns:repeat(2,1fr)}
    .culture-grid{grid-template-columns:repeat(2,1fr)}
    .gallery-grid{grid-template-columns:repeat(2,1fr)}
    .header-contact{display:none}
    .intro-wrapper{grid-template-columns:1fr;gap:35px}
    .intro-img-col{order:-1;padding-top:0}
    .intro-img-frame{min-height:280px;max-width:500px;margin:0 auto}
}

/* ==================== Responsive: Mobile ==================== */
@media (max-width: 768px) {
    .header-container{height:80px}
    .site-main{margin-top:80px}
    .logo-img{height:67px}
    .header-contact{display:none}
    .mobile-menu-btn{display:flex}
    .main-nav{position:fixed;top:60px;left:0;right:0;bottom:0;background:#fff;transform:translateX(100%);transition:transform 0.3s;overflow-y:auto;z-index:1000}
    .main-nav.active{transform:translateX(0)}
    .nav-list{flex-direction:column;padding:10px}
    .nav-link{padding:12px 16px;font-size:16px;border-bottom:1px solid #f0f0f0}
    .dropdown-menu{position:static;box-shadow:none;padding-left:15px;display:none}
    .dropdown.open .dropdown-menu{display:block}
    .dropdown-menu a{padding:10px 20px;font-size:15px}
    .nav-overlay.active{display:block}
    
    .home-banner{height:400px}
    .banner-content h1{font-size:26px}
    .banner-content .banner-sub{font-size:16px}
    
    .product-cards-grid,.case-cards-grid,.list-grid{grid-template-columns:1fr;gap:15px}
    .advantages-grid{grid-template-columns:1fr}
    .quick-links-grid{grid-template-columns:1fr 1fr;gap:10px}
    .rec-items-grid{grid-template-columns:repeat(2,1fr);gap:12px}
    .culture-grid{grid-template-columns:1fr}
    .gallery-grid{grid-template-columns:1fr}
    .strength-grid{grid-template-columns:1fr}
    .intro-wrapper{grid-template-columns:1fr;gap:28px}
    .intro-img-col{order:-1;padding-top:0}
    .intro-img-frame{min-height:220px;max-width:100%;margin:0 auto}
    .intro-stats-row{gap:20px;flex-wrap:wrap;justify-content:center}
    .intro-stat strong{font-size:28px}
    .intro-stat strong span{font-size:15px}

    /* 发展历程移动端 */
    .history-list{grid-template-columns:1fr;gap:16px}
    .history-card{padding:20px}
    
    .footer-main{grid-template-columns:1fr;gap:25px;padding:30px 20px}
    
    .section-title{font-size:22px}
    .section{padding:40px 0}
    .page-header h1{font-size:22px}
    
    .detail-layout,.contact-grid{grid-template-columns:1fr}
    .about-grid{grid-template-columns:1fr;gap:30px}
    
    
    /* Side contact bar: bottom mobile */
    .side-contact{position:fixed;right:0;bottom:0;left:0;top:auto;transform:none;flex-direction:row;gap:0;z-index:950;background:#fff;box-shadow:0 -2px 8px rgba(0,0,0,0.1)}
    .side-item{flex:1}
    .side-link{padding:10px 5px;justify-content:center;flex-direction:column;gap:4px;box-shadow:none;border-radius:0;text-align:center;font-size:11px}
    .side-text{font-size:11px}
    .side-text br{display:none}
    .side-icon{width:20px;height:20px}
    .wechat-qr-popup{right:0;top:auto;bottom:100%;transform:none}
    .site-main{padding-bottom:80px}
    
    .back-to-top{right:10px;bottom:100px}
    
    .pagination a,.pagination span{min-width:32px;height:32px;font-size:12px}
}