*{margin:0;padding:0;box-sizing:border-box}
:root{--primary:#0EA5E9;--primary-dark:#0284C7;--primary-light:#7DD3FC;--primary-bg:#F0F9FF;--accent:#38BDF8;--white:#FFFFFF;--gray-50:#F8FAFC;--gray-100:#F1F5F9;--gray-200:#E2E8F0;--gray-300:#CBD5E1;--gray-400:#94A3B8;--gray-500:#64748B;--gray-600:#475569;--gray-700:#334155;--gray-800:#1E293B;--shadow:0 2px 12px rgba(14,165,233,0.08);--shadow-hover:0 8px 30px rgba(14,165,233,0.15);--radius:12px;--transition:all 0.3s ease}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--gray-700);background:var(--gray-50);line-height:1.6}
a{text-decoration:none;color:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,0.95);backdrop-filter:blur(10px);border-bottom:1px solid var(--gray-200);transition:var(--transition)}
.header.scrolled{box-shadow:0 2px 20px rgba(0,0,0,0.06)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:8px;font-size:20px;font-weight:700;color:var(--primary)}
.logo i{font-size:24px}
.nav{display:flex;gap:32px}
.nav-link{font-size:15px;color:var(--gray-600);transition:var(--transition);position:relative;padding:4px 0}
.nav-link:hover,.nav-link.active{color:var(--primary)}
.nav-link.active::after{content:'';position:absolute;bottom:-2px;left:0;right:0;height:2px;background:var(--primary);border-radius:1px}
.header-actions{display:flex;gap:12px;align-items:center}
.header-user{display:flex;align-items:center;gap:16px}
.header-avatar-link{display:inline-flex;line-height:0}
.header-avatar{width:36px;height:36px;border-radius:50%;object-fit:cover}
.header-nickname{font-size:14px;color:var(--gray-700);text-decoration:none}
.header-action-btn{padding:6px 16px;font-size:13px}
.header-action-btn.is-muted{border-color:var(--gray-300);color:var(--gray-500)}
.btn-login{padding:8px 20px;border:1px solid var(--primary);color:var(--primary);border-radius:20px;font-size:14px;font-weight:500;transition:var(--transition)}
.btn-login:hover{background:var(--primary-bg)}
.btn-register{padding:8px 20px;background:linear-gradient(135deg,var(--primary),var(--accent));color:var(--white);border-radius:20px;font-size:14px;font-weight:500;transition:var(--transition);box-shadow:0 2px 8px rgba(14,165,233,0.3)}
.btn-register:hover{transform:translateY(-1px);box-shadow:0 4px 16px rgba(14,165,233,0.4)}
.mobile-menu-btn{display:none;background:none;border:none;font-size:22px;color:var(--gray-700);cursor:pointer}
.mobile-nav{display:none;position:fixed;top:64px;left:0;right:0;background:var(--white);padding:16px 20px;z-index:999;border-bottom:1px solid var(--gray-200);box-shadow:0 4px 20px rgba(0,0,0,0.08)}
.mobile-nav.show{display:flex;flex-direction:column;gap:12px}
.mobile-nav .nav-link{padding:8px 0;font-size:16px}
.btn-publish-mobile{display:block;text-align:center;padding:10px;background:linear-gradient(135deg,var(--primary),var(--accent));color:var(--white);border-radius:8px;font-weight:500;margin-top:8px}
.banner{margin-top:64px;background:linear-gradient(135deg,#0EA5E9 0%,#38BDF8 50%,#7DD3FC 100%);position:relative;padding:80px 20px 120px;text-align:center;overflow:hidden}
.banner::before{content:'';position:absolute;top:-50%;right:-20%;width:500px;height:500px;background:rgba(255,255,255,0.08);border-radius:50%}
.banner::after{content:'';position:absolute;bottom:-30%;left:-10%;width:400px;height:400px;background:rgba(255,255,255,0.05);border-radius:50%}
.banner-content{position:relative;z-index:1}
.banner h1{font-size:40px;color:var(--white);font-weight:700;margin-bottom:12px}
.banner p{font-size:18px;color:rgba(255,255,255,0.85);margin-bottom:32px}
.search-box{display:flex;max-width:560px;margin:0 auto 24px;background:var(--white);border-radius:50px;overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,0.1)}
.search-box input{flex:1;padding:14px 24px;border:none;outline:none;font-size:15px;color:var(--gray-700)}
.search-box input::placeholder{color:var(--gray-400)}
.search-btn{padding:14px 28px;background:linear-gradient(135deg,var(--primary),var(--accent));color:var(--white);border:none;cursor:pointer;font-size:16px;transition:var(--transition)}
.search-btn:hover{background:var(--primary-dark)}
.banner-tags{display:flex;justify-content:center;gap:10px;flex-wrap:wrap}
.tag{padding:6px 16px;background:rgba(255,255,255,0.2);color:var(--white);border-radius:20px;font-size:13px;cursor:pointer;transition:var(--transition);backdrop-filter:blur(4px);text-decoration:none;display:inline-block}
.tag:hover{background:rgba(255,255,255,0.35);color:var(--white)}
.banner-wave{position:absolute;bottom:-1px;left:0;right:0}
.banner-wave svg{display:block;width:100%;height:60px}
.section{padding:60px 0}
.section-gray{background:var(--gray-50)}
.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:32px}
.section-header h2{font-size:24px;font-weight:700;color:var(--gray-800);display:flex;align-items:center;gap:10px}
.section-header h2 i{color:var(--primary);font-size:22px}
.view-more{color:var(--primary);font-size:14px;display:flex;align-items:center;gap:4px;transition:var(--transition)}
.view-more:hover{gap:8px;color:var(--primary-dark)}
.category-tabs{display:flex;gap:10px;margin-bottom:28px;flex-wrap:wrap}
.tab-btn{padding:8px 20px;border:1px solid var(--gray-200);background:var(--white);color:var(--gray-600);border-radius:24px;font-size:14px;cursor:pointer;transition:var(--transition)}
.tab-btn:hover{border-color:var(--primary-light);color:var(--primary)}
.tab-btn.active{background:var(--primary);color:var(--white);border-color:var(--primary)}
.sort-options{display:flex;gap:8px}
.sort-btn{padding:6px 16px;border:1px solid var(--gray-200);background:var(--white);color:var(--gray-500);border-radius:6px;font-size:13px;cursor:pointer;transition:var(--transition);text-decoration:none;display:inline-flex;align-items:center;justify-content:center}
.sort-btn:hover{border-color:var(--primary-light);color:var(--primary)}
.sort-btn.active{background:var(--primary);color:var(--white);border-color:var(--primary)}
.card-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:var(--transition);cursor:pointer;display:block}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.card-img{position:relative;width:100%;padding-top:75%;overflow:hidden;background:var(--gray-100)}
.card-img img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;transition:transform 0.4s ease}
.card:hover .card-img img{transform:scale(1.05)}
.card-badge{position:absolute;top:10px;left:10px;padding:3px 10px;border-radius:4px;font-size:12px;font-weight:600;color:var(--white);z-index:1}
.card-badge.hot{background:linear-gradient(135deg,#F97316,#FB923C)}
.card-badge.new{background:linear-gradient(135deg,var(--primary),var(--accent))}
.card-body{padding:16px}
.card-title{font-size:15px;font-weight:600;color:var(--gray-800);margin-bottom:6px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-desc{font-size:13px;color:var(--gray-400);margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.card-footer{display:flex;align-items:center;justify-content:space-between}
.card-contact{font-size:13px;color:var(--gray-500);display:flex;align-items:center;gap:4px}
.card-contact i{font-size:12px;color:var(--primary-light)}
.btn-view{padding:5px 14px;background:var(--primary-bg);color:var(--primary);border-radius:6px;font-size:13px;font-weight:500;transition:var(--transition)}
.btn-view:hover{background:var(--primary);color:var(--white)}
.pagination{display:flex;justify-content:center;gap:6px;margin-top:40px}
.page-btn{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border:1px solid var(--gray-200);background:var(--white);color:var(--gray-600);border-radius:8px;font-size:14px;transition:var(--transition)}
.page-btn:hover,.page-btn.active{background:var(--primary);color:var(--white);border-color:var(--primary)}
.page-btn.disabled{pointer-events:none;color:var(--gray-300);cursor:not-allowed}
.footer{background:var(--gray-800);color:var(--gray-300);padding:48px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;padding-bottom:32px}
.footer-col h4{color:var(--white);font-size:16px;margin-bottom:16px;display:flex;align-items:center;gap:8px}
.footer-col h4 i{color:var(--primary-light)}
.footer-col p{font-size:14px;line-height:1.8;display:flex;align-items:center;gap:8px}
.footer-col p i{color:var(--primary-light);width:16px}
.footer-col a{display:block;font-size:14px;color:var(--gray-400);padding:4px 0;transition:var(--transition)}
.footer-col a:hover{color:var(--primary-light);padding-left:4px}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.1);padding:20px 0;text-align:center;font-size:13px;color:var(--gray-500)}
.back-to-top{position:fixed;bottom:30px;right:30px;width:44px;height:44px;background:linear-gradient(135deg,var(--primary),var(--accent));color:var(--white);border:none;border-radius:50%;font-size:18px;cursor:pointer;box-shadow:0 4px 12px rgba(14,165,233,0.3);transition:var(--transition);opacity:0;visibility:hidden;z-index:999}
.back-to-top.show{opacity:1;visibility:visible}
.back-to-top:hover{transform:translateY(-3px);box-shadow:0 6px 20px rgba(14,165,233,0.4)}
@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr)}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:768px){.nav,.header-actions{display:none}.mobile-menu-btn{display:block}.banner{padding:50px 20px 90px}.banner h1{font-size:28px}.banner p{font-size:15px}.card-grid{grid-template-columns:repeat(2,1fr);gap:12px}.section{padding:40px 0}.section-header h2{font-size:18px}.footer-grid{grid-template-columns:1fr;gap:24px}}
@media(max-width:480px){.card-grid{grid-template-columns:repeat(2,1fr);gap:10px}.card-body{padding:10px}.card-title{font-size:13px}.card-desc{display:none}.card-footer{flex-direction:column;align-items:flex-start;gap:8px}.search-box{border-radius:30px}.search-box input{padding:12px 16px;font-size:14px}}