:root{--bgColor:#f5f7fa}body,html{height:auto;min-height:100vh;font:14px/1.5 "PingFang SC","微软雅黑","Microsoft YaHei",Helvetica,"Helvetica Neue",Tahoma,Arial,sans-serif;background:var(--bgColor);scroll-behavior:smooth}header{border-bottom:1px solid #eee;box-shadow:0 2px 10px rgba(10,20,100,.1);background-color:var(--bgColor)}header .navbar-brand{font-weight:700;font-size:large}header .nav-item{display:inline-flex;flex-direction:row;align-items:center;justify-content:center;font-size:1rem;font-weight:700}header .nav-item .menu-ico{width:20px;margin-right:5px}main{margin:auto;background-color:var(--bgColor)}.breadcrumb{margin-top:20px;display:flex;align-items:center;gap:8px}.breadcrumb a{color:#666;text-decoration:none}.breadcrumb a:hover{color:#2196f3}.breadcrumb a::after{content:'›';margin-left:8px;color:#999}.breadcrumb .title{width:70%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.menu-btn{width:2rem;border:none;border-radius:5px;background:0 0;padding:0;margin:0}.menu-btn img{width:100%}.scard{min-height:100px;width:100%;padding:5px;border:1px solid green;border-radius:5px}.tag-short_video{background:#ff6b6b!important}.tag-video{background:#4caf50!important}.tag-technology{background:#2196f3!important}.tag-share{background:linear-gradient(#ff416c,#ff4b2b)!important}.tag-book{background:#9c27b0!important}.tag-education{background:linear-gradient(#00c6ff,#0072ff)!important}footer{padding:20px 0;display:flex;flex-direction:column;justify-content:center;align-items:center;font-size:.8rem;color:rgba(86,86,86,.5);background-color:var(--bgColor)}.feedback-btn{position:fixed;right:0;bottom:30px;display:flex;align-items:center;gap:8px;padding:12px 20px;background:linear-gradient(135deg,#2196f3,#1976d2);color:#fff;border-radius:50px 0 0 50px;box-shadow:0 4px 15px rgba(33,150,243,.3);cursor:pointer;transition:all .3s ease;z-index:1000;text-decoration:none;transform:translateX(calc(100% - 48px))}.feedback-btn:hover{transform:translateX(0);box-shadow:0 6px 20px rgba(33,150,243,.4);color:#fff}.feedback-btn .feedback-icon{display:flex;align-items:center;justify-content:center;width:24px;height:24px;flex-shrink:0}.feedback-btn .feedback-text{font-size:14px;font-weight:500;white-space:nowrap}@media (max-width:768px){.feedback-btn{bottom:20px;padding:10px 16px}.feedback-btn .feedback-text{font-size:13px}}