*{margin:0;padding:0;box-sizing:border-box}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:"Microsoft YaHei","微软雅黑","PingFang SC","Helvetica Neue",Arial,sans-serif;line-height:1.8;color:#333;background:#fff}
a{text-decoration:none;color:inherit;transition:color .3s}
ul,ol{list-style:none}
img{max-width:100%;height:auto;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
/* ===== Header ===== */
.site-header{background:#1a1a2e;position:fixed;top:0;left:0;width:100%;z-index:1000;box-shadow:0 2px 15px rgba(0,0,0,.3)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:70px}
.site-logo{font-size:26px;font-weight:bold;color:#e74c3c;letter-spacing:2px}
.site-logo a{color:#e74c3c}
.site-logo a:hover{color:#ff6b6b}
.main-nav ul{display:flex;gap:5px}
.main-nav a{display:block;padding:8px 18px;color:#fff;border-radius:4px;font-size:15px;transition:background .3s,color .3s}
.main-nav a:hover,.main-nav a.active{background:#e74c3c;color:#fff}
.menu-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:5px}
.menu-toggle span{display:block;width:25px;height:3px;background:#fff;border-radius:2px;transition:all .3s}
/* ===== Hero ===== */
.hero-section{margin-top:70px;background:linear-gradient(135deg,#1a1a2e 0%,#16213e 50%,#0f3460 100%);color:#fff;padding:80px 0;text-align:center}
.hero-section h1{font-size:42px;margin-bottom:20px;text-shadow:0 2px 10px rgba(0,0,0,.3)}
.hero-section p{font-size:18px;max-width:700px;margin:0 auto 30px;opacity:.9;line-height:1.8}
.hero-buttons{display:flex;gap:15px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 30px;border-radius:25px;font-size:16px;transition:all .3s;cursor:pointer;border:none}
.btn-primary{background:linear-gradient(135deg,#e74c3c,#c0392b);color:#fff;box-shadow:0 4px 15px rgba(231,76,60,.4)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(231,76,60,.6)}
.btn-outline{border:2px solid #fff;color:#fff;background:transparent}
.btn-outline:hover{background:#fff;color:#1a1a2e}
/* ===== Breadcrumb ===== */
.breadcrumb{margin-top:70px;background:#f8f9fa;padding:15px 0;border-bottom:1px solid #eee}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.breadcrumb li{font-size:14px;color:#666}
.breadcrumb li+li::before{content:">";margin-right:8px;color:#999}
.breadcrumb a{color:#e74c3c}
.breadcrumb a:hover{text-decoration:underline}
/* ===== Page Title ===== */
.page-title{background:linear-gradient(135deg,#1a1a2e 0%,#16213e 100%);color:#fff;padding:50px 0;text-align:center;margin-top:70px}
.page-title h1{font-size:36px;margin-bottom:10px}
.page-title p{font-size:16px;opacity:.85}
/* ===== Section ===== */
.section{padding:60px 0}
.section-alt{background:#f8f9fa}
.section-title{text-align:center;font-size:28px;margin-bottom:40px;color:#1a1a2e;position:relative;padding-bottom:15px}
.section-title::after{content:"";position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:60px;height:3px;background:#e74c3c;border-radius:2px}
/* ===== Card Grid ===== */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.card{background:#fff;border-radius:10px;overflow:hidden;box-shadow:0 3px 15px rgba(0,0,0,.08);transition:transform .3s,box-shadow .3s}
.card:hover{transform:translateY(-5px);box-shadow:0 8px 30px rgba(0,0,0,.15)}
.card-thumb{height:200px;background:linear-gradient(135deg,#e74c3c,#c0392b);display:flex;align-items:center;justify-content:center;color:#fff;font-size:48px}
.card-thumb.thumb-2{background:linear-gradient(135deg,#3498db,#2980b9)}
.card-thumb.thumb-3{background:linear-gradient(135deg,#2ecc71,#27ae60)}
.card-thumb.thumb-4{background:linear-gradient(135deg,#9b59b6,#8e44ad)}
.card-thumb.thumb-5{background:linear-gradient(135deg,#f39c12,#e67e22)}
.card-thumb.thumb-6{background:linear-gradient(135deg,#1abc9c,#16a085)}
.card-body{padding:20px}
.card-body h3{font-size:18px;margin-bottom:10px;line-height:1.5}
.card-body h3 a{color:#1a1a2e}
.card-body h3 a:hover{color:#e74c3c}
.card-body p{font-size:14px;color:#666;line-height:1.8;margin-bottom:15px}
.card-meta{display:flex;justify-content:space-between;font-size:12px;color:#999}
.card-tag{display:inline-block;background:#f0f0f0;padding:2px 10px;border-radius:12px;font-size:12px;color:#666;margin-right:5px}
/* ===== Article ===== */
.article-content{max-width:800px;margin:0 auto;padding:40px 0}
.article-header{margin-bottom:30px}
.article-header h1{font-size:30px;line-height:1.5;margin-bottom:15px;color:#1a1a2e}
.article-info{display:flex;gap:20px;font-size:14px;color:#999;padding-bottom:20px;border-bottom:1px solid #eee}
.article-body{font-size:16px;line-height:2;color:#444}
.article-body p{margin-bottom:20px;text-indent:2em}
.article-tags{margin-top:40px;padding-top:20px;border-top:1px solid #eee}
.article-tags span{display:inline-block;background:#f0f0f0;padding:5px 15px;border-radius:15px;font-size:13px;color:#666;margin:0 8px 8px 0}
/* ===== About ===== */
.about-content{max-width:800px;margin:0 auto}
.about-content p{font-size:16px;line-height:2;color:#444;margin-bottom:20px;text-indent:2em}
/* ===== Contact ===== */
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:40px;max-width:900px;margin:0 auto}
.contact-item{background:#fff;padding:30px;border-radius:10px;box-shadow:0 3px 15px rgba(0,0,0,.08);text-align:center}
.contact-item h3{font-size:18px;margin-bottom:15px;color:#1a1a2e}
.contact-item p{font-size:15px;color:#666;line-height:1.8}
/* ===== Sidebar ===== */
.content-with-sidebar{display:grid;grid-template-columns:2fr 1fr;gap:30px;align-items:start}
.sidebar{background:#fff;border-radius:10px;padding:25px;box-shadow:0 3px 15px rgba(0,0,0,.08);position:sticky;top:90px}
.sidebar-title{font-size:18px;margin-bottom:20px;padding-bottom:10px;border-bottom:2px solid #e74c3c;color:#1a1a2e}
.sidebar-list li{padding:10px 0;border-bottom:1px solid #f0f0f0}
.sidebar-list li:last-child{border-bottom:none}
.sidebar-list a{font-size:14px;color:#555;display:block;transition:color .3s}
.sidebar-list a:hover{color:#e74c3c}
/* ===== Footer ===== */
.site-footer{background:#1a1a2e;color:#aaa;padding:40px 0 20px}
.footer-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:40px;margin-bottom:30px}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:15px}
.footer-col p,.footer-col li{font-size:14px;line-height:2}
.footer-col a{color:#aaa}
.footer-col a:hover{color:#e74c3c}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid #333;font-size:13px}
.footer-bottom a{color:#e74c3c}
/* ===== Pagination ===== */
.pagination{display:flex;justify-content:center;gap:8px;margin-top:40px}
.pagination a,.pagination span{display:inline-block;padding:8px 16px;border-radius:5px;font-size:14px;border:1px solid #ddd;color:#666;transition:all .3s}
.pagination a:hover{background:#e74c3c;color:#fff;border-color:#e74c3c}
.pagination .current{background:#e74c3c;color:#fff;border-color:#e74c3c}
/* ===== Floating Buttons ===== */
.floating-btns{position:fixed;right:20px;top:90px;z-index:999;display:flex;flex-direction:column;gap:12px}
.floating-btn{display:flex;align-items:center;justify-content:center;padding:18px 32px;border-radius:32px;color:#fff;font-size:18px;font-weight:bold;letter-spacing:2px;box-shadow:0 4px 20px rgba(0,0,0,.25);transition:all .3s;white-space:nowrap;min-width:180px;text-align:center}
.floating-btn:hover{transform:translateY(-3px) scale(1.03);color:#fff}
.floating-btn-primary{background:linear-gradient(135deg,#e74c3c,#c0392b);box-shadow:0 4px 20px rgba(231,76,60,.45)}
.floating-btn-primary:hover{box-shadow:0 6px 28px rgba(231,76,60,.65)}
.floating-btn-secondary{background:linear-gradient(135deg,#2980b9,#1a5276);box-shadow:0 4px 20px rgba(41,128,185,.45)}
.floating-btn-secondary:hover{box-shadow:0 6px 28px rgba(41,128,185,.65)}
/* ===== Responsive ===== */
@media(max-width:992px){
.card-grid{grid-template-columns:repeat(2,1fr)}
.content-with-sidebar{grid-template-columns:1fr}
.sidebar{position:static}
.footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
.menu-toggle{display:flex}
.main-nav{display:none;position:absolute;top:70px;left:0;width:100%;background:#1a1a2e;padding:15px 0;box-shadow:0 5px 15px rgba(0,0,0,.3)}
.main-nav.open{display:block}
.main-nav ul{flex-direction:column;padding:0 15px;gap:0}
.main-nav a{padding:12px 15px;border-radius:0;border-bottom:1px solid #2a2a3e}
.hero-section h1{font-size:28px}
.hero-section p{font-size:15px}
.hero-section{padding:50px 0}
.card-grid{grid-template-columns:1fr}
.page-title h1{font-size:26px}
.page-title{padding:35px 0}
.article-header h1{font-size:22px}
.contact-grid{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr;gap:25px}
.section{padding:40px 0}
.section-title{font-size:22px}
.floating-btns{right:10px;top:80px;gap:10px}
.floating-btn{padding:14px 22px;font-size:15px;min-width:140px;border-radius:26px}
}