/* AI智能案例生成平台 - 全局样式 | 大气蓝色商业风格 */
:root{--primary:#1a5fb4;--primary-dark:#0d3b7a;--primary-light:#4a9eff;--secondary:#00c6ff;--accent:#00d4aa;--dark:#0a1628;--dark-light:#1a2744;--text:#1e293b;--text-light:#64748b;--text-muted:#94a3b8;--bg:#f0f4f8;--bg-white:#fff;--border:#e2e8f0;--shadow:0 4px 20px rgba(26,95,180,0.08);--shadow-lg:0 10px 40px rgba(26,95,180,0.12);--radius:12px;--radius-sm:8px;--transition:all 0.2s cubic-bezier(0.4,0,0.2,1);--font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.6;min-height:100vh}
a{color:var(--primary);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--primary-light)}
img{max-width:100%;height:auto;display:block}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 28px;border-radius:var(--radius-sm);font-size:15px;font-weight:600;cursor:pointer;border:none;transition:var(--transition);white-space:nowrap;position:relative;overflow:hidden}
.btn::after{content:"";position:absolute;top:50%;left:50%;width:0;height:0;background:rgba(255,255,255,0.2);border-radius:50%;transform:translate(-50%,-50%);transition:width 0.4s,height 0.4s}
.btn:active::after{width:300px;height:300px}
.btn-primary{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-light) 100%);color:#fff;box-shadow:0 4px 15px rgba(26,95,180,0.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(26,95,180,0.4);color:#fff}
.btn-secondary{background:linear-gradient(135deg,var(--secondary) 0%,var(--accent) 100%);color:#fff}
.btn-outline{background:transparent;border:2px solid var(--primary);color:var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff}
.btn-lg{padding:16px 40px;font-size:16px}
.btn-sm{padding:8px 16px;font-size:13px}

/* 卡片 */
.card{background:var(--bg-white);border-radius:var(--radius);box-shadow:var(--shadow);transition:var(--transition);border:1px solid var(--border);overflow:hidden}
.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.card-header{padding:20px 24px;border-bottom:1px solid var(--border);font-weight:600;font-size:16px}
.card-body{padding:24px}

/* 表单 */
.form-group{margin-bottom:20px}
.form-label{display:block;margin-bottom:8px;font-weight:500;color:var(--text);font-size:14px}
.form-control{width:100%;padding:12px 16px;border:2px solid var(--border);border-radius:var(--radius-sm);font-size:15px;font-family:var(--font);transition:var(--transition);background:var(--bg-white);color:var(--text)}
.form-control:focus{outline:none;border-color:var(--primary-light);box-shadow:0 0 0 4px rgba(26,95,180,0.1)}
.form-control::placeholder{color:var(--text-muted)}

/* 导航 */
.navbar{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,0.95);backdrop-filter:blur(20px);border-bottom:1px solid rgba(226,232,240,0.6);transition:var(--transition)}
.navbar.scrolled{box-shadow:0 2px 20px rgba(0,0,0,0.06)}
.navbar-container{max-width:1280px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;height:72px}
.navbar-brand{display:flex;align-items:center;gap:12px;font-size:22px;font-weight:700;color:var(--dark);letter-spacing:-0.5px}
.navbar-brand .logo-icon{width:40px;height:40px;background:linear-gradient(135deg,var(--primary) 0%,var(--secondary) 100%);border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:20px}
.navbar-nav{display:flex;align-items:center;gap:32px;list-style:none}
.navbar-nav a{color:var(--text);font-weight:500;font-size:15px;position:relative;padding:4px 0}
.navbar-nav a::after{content:"";position:absolute;bottom:0;left:0;width:0;height:2px;background:linear-gradient(90deg,var(--primary),var(--secondary));transition:width 0.3s}
.navbar-nav a:hover::after,.navbar-nav a.active::after{width:100%}
.navbar-nav a:hover{color:var(--primary)}
.navbar-actions{display:flex;align-items:center;gap:16px}
.mobile-menu-btn{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.mobile-menu-btn span{width:24px;height:2px;background:var(--text);transition:var(--transition);border-radius:2px}

/* Hero */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;background:linear-gradient(135deg,var(--dark) 0%,var(--dark-light) 50%,var(--primary-dark) 100%);overflow:hidden;padding-top:72px}
.hero::before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(circle at 20% 50%,rgba(0,198,255,0.1) 0%,transparent 50%),radial-gradient(circle at 80% 20%,rgba(0,212,170,0.08) 0%,transparent 50%);pointer-events:none}
.hero-grid{position:absolute;top:0;left:0;right:0;bottom:0;background-image:linear-gradient(rgba(255,255,255,0.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,0.03) 1px,transparent 1px);background-size:60px 60px;pointer-events:none}
.hero-container{max-width:1280px;margin:0 auto;padding:0 24px;display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;position:relative;z-index:1}
.hero-content h1{font-size:56px;font-weight:800;color:#fff;line-height:1.15;margin-bottom:24px;letter-spacing:-1px}
.hero-content h1 .gradient-text{background:linear-gradient(135deg,var(--secondary) 0%,var(--accent) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-content p{font-size:18px;color:rgba(255,255,255,0.7);margin-bottom:40px;line-height:1.8;max-width:520px}
.hero-buttons{display:flex;gap:16px;flex-wrap:wrap}
.hero-stats{display:flex;gap:40px;margin-top:60px;padding-top:30px;border-top:1px solid rgba(255,255,255,0.1)}
.hero-stats .stat-item h3{font-size:32px;font-weight:700;color:var(--secondary);margin-bottom:4px}
.hero-stats .stat-item p{font-size:14px;color:rgba(255,255,255,0.5);margin:0}
.hero-visual{position:relative}
.hero-visual .floating-card{background:rgba(255,255,255,0.05);backdrop-filter:blur(20px);border:1px solid rgba(255,255,255,0.1);border-radius:var(--radius);padding:24px;color:#fff;position:absolute;animation:float 6s ease-in-out infinite}
.hero-visual .floating-card:nth-child(1){top:10%;right:10%;animation-delay:0s}
.hero-visual .floating-card:nth-child(2){bottom:20%;left:0;animation-delay:2s}
.hero-visual .floating-card:nth-child(3){top:50%;right:0;animation-delay:4s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-20px)}}

/* 区块 */
.section-header{text-align:center;margin-bottom:60px}
.section-header h2{font-size:36px;font-weight:700;color:var(--dark);margin-bottom:16px}
.section-header p{font-size:17px;color:var(--text-light);max-width:600px;margin:0 auto}
.section-tag{display:inline-block;padding:6px 16px;background:linear-gradient(135deg,rgba(26,95,180,0.1) 0%,rgba(0,198,255,0.1) 100%);color:var(--primary);border-radius:20px;font-size:13px;font-weight:600;margin-bottom:16px;border:1px solid rgba(26,95,180,0.15)}

/* 产品 */
.products-section{padding:100px 0;background:var(--bg)}
.products-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px;max-width:1280px;margin:0 auto;padding:0 24px}
.product-card{background:var(--bg-white);border-radius:var(--radius);padding:32px;border:1px solid var(--border);transition:var(--transition);position:relative;overflow:hidden}
.product-card::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--primary),var(--secondary));transform:scaleX(0);transition:transform 0.3s}
.product-card:hover::before{transform:scaleX(1)}
.product-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-8px)}
.product-card .product-icon{width:56px;height:56px;background:linear-gradient(135deg,rgba(26,95,180,0.1) 0%,rgba(0,198,255,0.1) 100%);border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:20px;color:var(--primary)}
.product-card h3{font-size:18px;font-weight:600;margin-bottom:8px;color:var(--dark)}
.product-card p{font-size:14px;color:var(--text-light);margin-bottom:20px;line-height:1.6}
.product-card .product-price{display:flex;align-items:baseline;gap:8px;margin-bottom:20px}
.product-card .price{font-size:28px;font-weight:700;color:var(--primary)}
.product-card .original-price{font-size:16px;color:var(--text-muted);text-decoration:line-through}

/* 行业 */
.industries-section{padding:100px 0;background:linear-gradient(180deg,var(--bg) 0%,#fff 100%)}
.industries-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;max-width:1280px;margin:0 auto;padding:0 24px}
.industry-card{background:var(--bg-white);border-radius:var(--radius);padding:32px 24px;text-align:center;border:2px solid transparent;transition:var(--transition);cursor:pointer;position:relative}
.industry-card:hover{border-color:var(--primary);box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.industry-card.selected{border-color:var(--primary);background:linear-gradient(135deg,rgba(26,95,180,0.05) 0%,rgba(0,198,255,0.05) 100%)}
.industry-card .industry-icon{width:64px;height:64px;background:linear-gradient(135deg,var(--primary) 0%,var(--secondary) 100%);border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 16px;font-size:28px;color:#fff}
.industry-card h3{font-size:16px;font-weight:600;color:var(--dark);margin-bottom:8px}
.industry-card p{font-size:13px;color:var(--text-light)}

/* 特性 */
.features-section{padding:100px 0;background:var(--dark);color:#fff;position:relative;overflow:hidden}
.features-section::before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(circle at 50% 50%,rgba(0,198,255,0.05) 0%,transparent 70%)}
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:40px;max-width:1280px;margin:0 auto;padding:0 24px;position:relative;z-index:1}
.feature-item{display:flex;gap:20px}
.feature-item .feature-icon{width:48px;height:48px;min-width:48px;background:rgba(255,255,255,0.1);border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:20px;color:var(--secondary)}
.feature-item h3{font-size:18px;font-weight:600;margin-bottom:8px}
.feature-item p{font-size:14px;color:rgba(255,255,255,0.6);line-height:1.7}

/* 页脚 */
.footer{background:var(--dark);color:rgba(255,255,255,0.6);padding:60px 0 30px;border-top:1px solid rgba(255,255,255,0.05)}
.footer-container{max-width:1280px;margin:0 auto;padding:0 24px;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}
.footer-brand h3{color:#fff;font-size:20px;margin-bottom:16px;display:flex;align-items:center;gap:10px}
.footer-brand p{font-size:14px;line-height:1.8;margin-bottom:20px}
.footer-links h4{color:#fff;font-size:15px;margin-bottom:20px;font-weight:600}
.footer-links ul{list-style:none}
.footer-links li{margin-bottom:12px}
.footer-links a{color:rgba(255,255,255,0.6);font-size:14px;transition:color 0.2s}
.footer-links a:hover{color:var(--secondary)}
.footer-bottom{max-width:1280px;margin:40px auto 0;padding:20px 24px 0;border-top:1px solid rgba(255,255,255,0.05);text-align:center;font-size:13px;color:rgba(255,255,255,0.4)}

/* 认证页面 */
.auth-page{min-height:100vh;display:flex;background:linear-gradient(135deg,var(--dark) 0%,var(--primary-dark) 100%)}
.auth-container{display:grid;grid-template-columns:1fr 1fr;width:100%;max-width:1400px;margin:0 auto;min-height:100vh}
.auth-left{display:flex;flex-direction:column;justify-content:center;padding:60px;color:#fff}
.auth-left h1{font-size:42px;font-weight:800;margin-bottom:20px;line-height:1.2}
.auth-left p{font-size:16px;color:rgba(255,255,255,0.7);line-height:1.8;margin-bottom:40px}
.auth-right{display:flex;align-items:center;justify-content:center;padding:40px}
.auth-box{background:var(--bg-white);border-radius:var(--radius);padding:48px;width:100%;max-width:440px;box-shadow:0 20px 60px rgba(0,0,0,0.3)}
.auth-box h2{font-size:28px;font-weight:700;margin-bottom:8px;color:var(--dark)}
.auth-box .auth-subtitle{color:var(--text-light);margin-bottom:32px;font-size:14px}
.auth-tabs{display:flex;gap:8px;margin-bottom:24px;background:var(--bg);padding:4px;border-radius:var(--radius-sm)}
.auth-tab{flex:1;padding:10px;text-align:center;border-radius:8px;cursor:pointer;font-size:14px;font-weight:500;color:var(--text-light);transition:var(--transition);border:none;background:none}
.auth-tab.active{background:var(--bg-white);color:var(--primary);box-shadow:0 2px 8px rgba(0,0,0,0.06)}
.auth-divider{display:flex;align-items:center;gap:16px;margin:24px 0;color:var(--text-muted);font-size:13px}
.auth-divider::before,.auth-divider::after{content:"";flex:1;height:1px;background:var(--border)}

/* 用户中心 */
.dashboard{padding-top:72px;min-height:100vh;display:flex;background:var(--bg)}
.sidebar{width:260px;background:var(--bg-white);border-right:1px solid var(--border);min-height:calc(100vh - 72px);padding:24px 0;position:fixed;left:0;top:72px;bottom:0;overflow-y:auto}
.sidebar-menu{list-style:none;padding:0 16px}
.sidebar-menu li{margin-bottom:4px}
.sidebar-menu a{display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:var(--radius-sm);color:var(--text);font-size:14px;font-weight:500;transition:var(--transition)}
.sidebar-menu a:hover,.sidebar-menu a.active{background:linear-gradient(135deg,rgba(26,95,180,0.08) 0%,rgba(0,198,255,0.08) 100%);color:var(--primary)}
.sidebar-menu a .icon{width:20px;text-align:center}
.main-content{flex:1;margin-left:260px;padding:32px;max-width:calc(100% - 260px)}
.page-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:32px}
.page-header h1{font-size:24px;font-weight:700;color:var(--dark)}

/* 统计 */
.stats-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin-bottom:32px}
.stat-card{background:var(--bg-white);border-radius:var(--radius);padding:24px;border:1px solid var(--border);display:flex;align-items:center;gap:16px}
.stat-card .stat-icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:20px}
.stat-card .stat-icon.blue{background:linear-gradient(135deg,rgba(26,95,180,0.1) 0%,rgba(0,198,255,0.1) 100%);color:var(--primary)}
.stat-card .stat-icon.green{background:linear-gradient(135deg,rgba(0,212,170,0.1) 0%,rgba(0,198,255,0.1) 100%);color:var(--accent)}
.stat-card .stat-icon.orange{background:linear-gradient(135deg,rgba(255,159,67,0.1) 0%,rgba(255,107,107,0.1) 100%);color:#ff9f43}
.stat-card .stat-icon.purple{background:linear-gradient(135deg,rgba(142,68,173,0.1) 0%,rgba(155,89,182,0.1) 100%);color:#8e44ad}
.stat-card .stat-info h3{font-size:24px;font-weight:700;color:var(--dark);margin-bottom:4px}
.stat-card .stat-info p{font-size:13px;color:var(--text-light)}

/* 表格 */
.data-table{width:100%;border-collapse:collapse;background:var(--bg-white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.data-table th,.data-table td{padding:14px 20px;text-align:left;font-size:14px}
.data-table th{background:linear-gradient(135deg,var(--bg) 0%,#f8fafc 100%);font-weight:600;color:var(--text);border-bottom:2px solid var(--border)}
.data-table td{border-bottom:1px solid var(--border);color:var(--text-light)}
.data-table tr:hover td{background:rgba(26,95,180,0.02)}
.badge{display:inline-block;padding:4px 12px;border-radius:20px;font-size:12px;font-weight:500}
.badge-success{background:rgba(0,212,170,0.1);color:#00b894}
.badge-warning{background:rgba(255,159,67,0.1);color:#ff9f43}
.badge-danger{background:rgba(255,107,107,0.1);color:#ff6b6b}
.badge-info{background:rgba(26,95,180,0.1);color:var(--primary)}

/* 模态框 */
.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.5);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:2000;opacity:0;visibility:hidden;transition:var(--transition)}
.modal-overlay.active{opacity:1;visibility:visible}
.modal{background:var(--bg-white);border-radius:var(--radius);width:90%;max-width:520px;max-height:90vh;overflow-y:auto;box-shadow:0 20px 60px rgba(0,0,0,0.2);transform:scale(0.95);transition:transform 0.3s}
.modal-overlay.active .modal{transform:scale(1)}
.modal-header{padding:24px 24px 0;display:flex;justify-content:space-between;align-items:center}
.modal-header h3{font-size:18px;font-weight:600}
.modal-close{width:32px;height:32px;border-radius:50%;border:none;background:var(--bg);cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--text-light);transition:var(--transition)}
.modal-close:hover{background:var(--border);color:var(--text)}
.modal-body{padding:24px}
.modal-footer{padding:0 24px 24px;display:flex;justify-content:flex-end;gap:12px}

/* 支付 */
.pay-methods{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:24px}
.pay-method{border:2px solid var(--border);border-radius:var(--radius-sm);padding:20px;text-align:center;cursor:pointer;transition:var(--transition);background:var(--bg-white)}
.pay-method:hover{border-color:var(--primary-light)}
.pay-method.selected{border-color:var(--primary);background:linear-gradient(135deg,rgba(26,95,180,0.05) 0%,rgba(0,198,255,0.05) 100%)}
.pay-method .pay-icon{font-size:32px;margin-bottom:8px}
.pay-method h4{font-size:14px;font-weight:600;color:var(--dark)}

/* 进度条 */
.progress-bar{width:100%;height:8px;background:var(--bg);border-radius:4px;overflow:hidden;margin:16px 0}
.progress-fill{height:100%;background:linear-gradient(90deg,var(--primary) 0%,var(--secondary) 100%);border-radius:4px;transition:width 0.5s ease;position:relative}
.progress-fill::after{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(90deg,transparent,rgba(255,255,255,0.3),transparent);animation:shimmer 2s infinite}
@keyframes shimmer{0%{transform:translateX(-100%)}100%{transform:translateX(100%)}}

/* 加载 */
.loading-spinner{width:40px;height:40px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin 0.8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* Toast */
.toast{position:fixed;top:90px;right:24px;padding:16px 24px;border-radius:var(--radius-sm);background:var(--bg-white);box-shadow:0 10px 40px rgba(0,0,0,0.15);display:flex;align-items:center;gap:12px;z-index:3000;transform:translateX(120%);transition:transform 0.4s cubic-bezier(0.68,-0.55,0.265,1.55);border-left:4px solid var(--primary)}
.toast.show{transform:translateX(0)}
.toast.success{border-left-color:var(--accent)}
.toast.error{border-left-color:#ff6b6b}

/* 响应式 */
@media(max-width:1024px){
.hero-container{grid-template-columns:1fr;text-align:center}
.hero-content h1{font-size:40px}
.hero-content p{margin-left:auto;margin-right:auto}
.hero-buttons{justify-content:center}
.hero-stats{justify-content:center}
.hero-visual{display:none}
.auth-container{grid-template-columns:1fr}
.auth-left{display:none}
.footer-container{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
.navbar-nav{display:none;position:absolute;top:72px;left:0;right:0;background:var(--bg-white);flex-direction:column;padding:20px;box-shadow:var(--shadow-lg);gap:16px}
.navbar-nav.active{display:flex}
.mobile-menu-btn{display:flex}
.hero-content h1{font-size:32px}
.section-header h2{font-size:28px}
.products-grid,.industries-grid{grid-template-columns:1fr}
.footer-container{grid-template-columns:1fr;text-align:center}
.sidebar{transform:translateX(-100%);z-index:999;transition:transform 0.3s}
.sidebar.active{transform:translateX(0)}
.main-content{margin-left:0;max-width:100%;padding:16px}
.stats-row{grid-template-columns:1fr}
.pay-methods{grid-template-columns:1fr}
}

/* 性能优化 */
.card,.btn,.product-card,.industry-card{will-change:transform}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:0.01ms!important;animation-iteration-count:1!important;transition-duration:0.01ms!important}}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}
::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}
::selection{background:rgba(26,95,180,0.2);color:var(--primary-dark)}