*{margin:0;padding:0;box-sizing:border-box}
:root{--primary:#1a5276;--primary-light:#2980b9;--secondary:#27ae60;--bg:#f5f7fa;--card:#fff;--text:#2c3e50;--text-light:#7f8c8d;--border:#e8ecf1;--shadow:0 2px 12px rgba(0,0,0,0.08)}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);overflow-x:hidden;-webkit-font-smoothing:antialiased;line-height:1.6}

/* 启动画面 */
.splash-screen{position:fixed;inset:0;background:linear-gradient(135deg,#1a5276 0%,#2980b9 50%,#3498db 100%);display:flex;align-items:center;justify-content:center;z-index:9999;transition:opacity .6s,visibility .6s}
.splash-screen.hidden{opacity:0;visibility:hidden}
.splash-content{text-align:center;color:#fff}
.splash-icon{font-size:72px;margin-bottom:24px;animation:float 3s ease-in-out infinite}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-15px)}}
.splash-content h1{font-size:28px;margin-bottom:8px;letter-spacing:2px}
.splash-content p{font-size:15px;opacity:.85;margin-bottom:28px}
.loading-bar{width:180px;height:3px;background:rgba(255,255,255,.25);border-radius:2px;margin:0 auto;overflow:hidden}
.loading-progress{width:0;height:100%;background:#fff;border-radius:2px;transition:width .2s}

/* 封面 */
.magazine-cover{position:fixed;inset:0;background:linear-gradient(160deg,#0d3b66 0%,#1a5276 30%,#2980b9 70%,#3498db 100%);display:flex;align-items:center;justify-content:center;z-index:1000;overflow-y:auto}
.cover-inner{width:100%;min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 24px;position:relative}
.cover-bg-pattern{position:absolute;inset:0;opacity:.06;background-image:radial-gradient(circle,white 1px,transparent 1px);background-size:40px 40px}
.cover-content{text-align:center;color:#fff;position:relative;z-index:1;max-width:480px;width:100%}
.cover-badge{display:inline-block;background:rgba(255,255,255,.2);padding:4px 16px;border-radius:20px;font-size:13px;letter-spacing:2px;margin-bottom:20px;backdrop-filter:blur(10px)}
.cover-title{font-size:42px;font-weight:800;margin-bottom:16px;text-shadow:0 2px 20px rgba(0,0,0,.3);letter-spacing:4px}
.cover-divider{width:60px;height:2px;background:rgba(255,255,255,.6);margin:20px auto;position:relative}
.cover-divider span{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background:transparent;font-size:20px}
.cover-subtitle{font-size:18px;opacity:.9;margin-bottom:28px;letter-spacing:1px}
.cover-stats{display:flex;justify-content:center;gap:30px;margin-bottom:36px}
.cover-stat{text-align:center}
.stat-num{display:block;font-size:28px;font-weight:800;margin-bottom:2px}
.stat-label{font-size:12px;opacity:.7;letter-spacing:1px}
.btn-enter{background:#fff;color:var(--primary);border:none;padding:14px 36px;font-size:17px;border-radius:50px;cursor:pointer;display:inline-flex;align-items:center;gap:10px;font-weight:700;box-shadow:0 4px 20px rgba(0,0,0,.25);transition:transform .2s,box-shadow .2s}
.btn-enter:active{transform:scale(.96)}
.cover-footer{position:relative;z-index:1;margin-top:36px;font-size:13px;opacity:.6;letter-spacing:1px}

/* 主内容区 */
.magazine-body{max-width:100%;min-height:100vh;background:var(--bg);padding-bottom:70px}

/* 顶部导航 */
.top-nav{position:fixed;top:0;left:0;right:0;height:56px;background:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 12px;box-shadow:0 1px 4px rgba(0,0,0,.06);z-index:100}
.nav-btn{background:none;border:none;padding:10px;cursor:pointer;color:var(--text);border-radius:10px;transition:background .2s}
.nav-btn:active{background:var(--bg)}
.nav-title{font-size:16px;font-weight:700;color:var(--primary);max-width:60%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;text-align:center}

/* 目录侧边栏 */
.toc-overlay{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:199;display:none}
.toc-overlay.active{display:block}
.toc-sidebar{position:fixed;top:0;left:-300px;width:300px;height:100%;background:#fff;z-index:200;transition:left .3s cubic-bezier(.4,0,.2,1);overflow-y:auto;box-shadow:2px 0 20px rgba(0,0,0,.1)}
.toc-sidebar.active{left:0}
.toc-header{padding:18px 20px;background:var(--primary);color:#fff;display:flex;justify-content:space-between;align-items:center;position:sticky;top:0;z-index:1}
.toc-header h2{font-size:18px}
.toc-close{background:none;border:none;color:#fff;font-size:22px;cursor:pointer;padding:4px}
.toc-content{padding:12px}
.toc-section{margin-bottom:16px}
.toc-section-title{font-size:15px;font-weight:700;color:var(--primary);padding:10px 12px;border-bottom:2px solid var(--primary);margin-bottom:6px}
.toc-article{padding:10px 12px;border-radius:8px;cursor:pointer;transition:background .15s}
.toc-article:active{background:var(--bg)}
.toc-article-title{font-size:14px;color:var(--text);margin-bottom:2px;line-height:1.4}
.toc-article-desc{font-size:12px;color:var(--text-light)}

/* 内容区 */
.content-area{margin-top:56px;padding:20px 16px}

/* 欢迎页 */
.welcome-header{text-align:center;margin-bottom:28px}
.welcome-header h2{font-size:24px;color:var(--primary);margin-bottom:8px}
.welcome-header p{color:var(--text-light);font-size:15px}
.welcome-sections{display:grid;gap:16px}
.section-card{background:var(--card);border-radius:16px;padding:24px;box-shadow:var(--shadow);cursor:pointer;transition:transform .2s;border-left:4px solid var(--primary)}
.section-card:active{transform:scale(.98)}
.section-card-icon{font-size:36px;margin-bottom:12px}
.section-card-title{font-size:20px;font-weight:700;margin-bottom:8px}
.section-card-desc{font-size:14px;color:var(--text-light);line-height:1.6;margin-bottom:12px}
.section-card-count{font-size:13px;color:var(--primary);font-weight:600}

/* 文章列表 */
.article-list-page{animation:slideIn .25s ease}
@keyframes slideIn{from{opacity:0;transform:translateX(20px)}to{opacity:1;transform:translateX(0)}}
.section-header{margin-bottom:16px}
.btn-back-list{background:none;border:none;color:var(--primary);font-size:15px;cursor:pointer;padding:4px 0;margin-bottom:8px;display:block;font-weight:600}
.section-header h2{font-size:22px}
.article-list{display:flex;flex-direction:column;gap:12px}
.article-item{background:var(--card);border-radius:12px;padding:18px;box-shadow:var(--shadow);cursor:pointer;transition:transform .15s}
.article-item:active{transform:scale(.98)}
.article-item-number{font-size:12px;color:var(--primary);font-weight:700;margin-bottom:6px;letter-spacing:1px}
.article-item-title{font-size:17px;font-weight:700;margin-bottom:6px;line-height:1.4}
.article-item-desc{font-size:13px;color:var(--text-light);line-height:1.5}

/* 文章内容页 */
.article-page{animation:slideIn .25s ease}
.article-header{margin-bottom:20px;padding-bottom:16px;border-bottom:2px solid var(--border)}
.btn-back-article{background:none;border:none;color:var(--primary);font-size:15px;cursor:pointer;padding:4px 0;margin-bottom:8px;display:block;font-weight:600}
.article-header h1{font-size:22px;line-height:1.5}
.article-body{font-size:16px;line-height:1.9}
.article-body h1{font-size:22px;color:var(--primary);margin:28px 0 14px;padding-left:12px;border-left:4px solid var(--primary)}
.article-body h2{font-size:20px;color:var(--primary);margin:24px 0 12px;padding-left:12px;border-left:4px solid var(--primary-light)}
.article-body h3{font-size:18px;color:var(--primary-light);margin:20px 0 10px}
.article-body h4{font-size:16px;color:var(--text);margin:16px 0 8px}
.article-body p{margin-bottom:14px}
.article-body ul,.article-body ol{margin-bottom:14px;padding-left:24px}
.article-body li{margin-bottom:6px}
.article-body hr{border:none;border-top:2px dashed var(--border);margin:28px 0}
.article-body strong{color:var(--primary)}
.article-body em{color:var(--text-light)}

.article-nav{margin-top:28px;padding-top:20px;border-top:2px solid var(--border);display:flex;justify-content:space-between;gap:12px}
.btn-nav-prev,.btn-nav-next{background:var(--primary);color:#fff;border:none;padding:10px 20px;border-radius:10px;cursor:pointer;font-size:14px;font-weight:600;transition:background .2s;max-width:48%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.btn-nav-prev:active,.btn-nav-next:active{background:var(--primary-light)}

/* 底部导航 */
.bottom-nav{position:fixed;bottom:0;left:0;right:0;height:60px;background:#fff;display:none;align-items:center;justify-content:space-around;box-shadow:0 -1px 4px rgba(0,0,0,.06);z-index:100}
.bottom-nav-btn{background:none;border:none;display:flex;flex-direction:column;align-items:center;gap:2px;cursor:pointer;color:var(--text-light);font-size:11px;padding:6px 16px;border-radius:8px;transition:color .2s}
.bottom-nav-btn:active{color:var(--primary);background:var(--bg)}

/* 响应式 */
@media(min-width:768px){
    .content-area{max-width:680px;margin-left:auto;margin-right:auto}
    .welcome-sections{grid-template-columns:repeat(3,1fr);gap:16px}
    .cover-title{font-size:52px}
}
@media(max-width:480px){
    .cover-title{font-size:32px}
    .cover-stats{gap:20px}
    .stat-num{font-size:24px}
    .content-area{padding:16px 12px}
    .article-header h1{font-size:20px}
    .article-body{font-size:15px;line-height:1.8}
    .toc-sidebar{width:260px;left:-260px}
}

/* 滚动条 */
::-webkit-scrollbar{width:4px}
::-webkit-scrollbar-thumb{background:#ccc;border-radius:2px}