/* ============================================
   罗罗作品集 2022-2024 · 样式表 v2
   响应式设计 · PC侧边栏 + 移动端自适应
   ============================================ */

/* --- CSS变量 --- */
:root {
    --color-bg: #faf8f5;
    --color-surface: #ffffff;
    --color-text: #2c2c2c;
    --color-text-secondary: #6b6b6b;
    --color-text-light: #999999;
    --color-accent: #c44536;
    --color-accent-2022: #c44536;
    --color-accent-2023: #d4843a;
    --color-accent-2024: #3a7bd4;
    --color-accent-light: #e07a5f;
    --color-accent-bg: #fdf2ed;
    --color-border: #e8e4df;
    --color-divider: #f0ece7;
    --color-card-bg: #ffffff;
    --color-sidebar-bg: #f5f1ec;
    --shadow-sm: 0 1px 3px rgba(0,0,0,.04);
    --shadow-md: 0 4px 16px rgba(0,0,0,.06);
    --shadow-lg: 0 8px 32px rgba(0,0,0,.08);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --font-serif: 'Noto Serif SC', 'Songti SC', serif;
    --font-sans: 'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', sans-serif;
    --sidebar-width: 280px;
    --max-content-width: 760px;
    --transition-fast: .2s ease;
    --transition-normal: .3s ease;
}

/* --- 全局重置 --- */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:var(--font-sans);font-size:16px;line-height:1.8;color:var(--color-text);background:var(--color-bg);overflow-x:hidden}

/* --- 阅读进度条 --- */
.progress-bar{position:fixed;top:0;left:0;height:3px;background:linear-gradient(90deg,var(--color-accent),var(--color-accent-light));z-index:1000;width:0;transition:width .1s linear}

/* --- 移动端顶部导航 --- */
.mobile-header{display:none;position:fixed;top:0;left:0;right:0;height:52px;background:rgba(250,248,245,.94);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--color-border);z-index:900;align-items:center;padding:0 14px;justify-content:space-between}
.menu-toggle{display:flex;flex-direction:column;gap:4px;background:none;border:none;cursor:pointer;padding:6px 3px;z-index:950}
.menu-toggle span{display:block;width:20px;height:2px;background:var(--color-text);border-radius:2px;transition:var(--transition-fast)}
.menu-toggle.active span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.menu-toggle.active span:nth-child(2){opacity:0}
.menu-toggle.active span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.mobile-title{font-family:var(--font-serif);font-size:16px;font-weight:700;color:var(--color-text)}
.mobile-year{font-family:var(--font-serif);font-size:13px;color:var(--color-accent);font-weight:600}

/* --- 遮罩层 --- */
.overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.35);z-index:800;opacity:0;transition:opacity var(--transition-normal)}
.overlay.active{display:block;opacity:1}

/* --- 应用容器 --- */
.app-container{display:flex;min-height:100vh}

/* ============================================
   侧边栏
   ============================================ */
.sidebar{width:var(--sidebar-width);min-width:var(--sidebar-width);height:100vh;position:fixed;left:0;top:0;background:var(--color-sidebar-bg);border-right:1px solid var(--color-border);display:flex;flex-direction:column;z-index:100;overflow-y:auto;padding:36px 24px 20px}
.sidebar-header{text-align:center;padding-bottom:24px;border-bottom:1px solid var(--color-border)}
.author-avatar{width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,var(--color-accent),var(--color-accent-light));color:#fff;font-family:var(--font-serif);font-size:26px;font-weight:700;display:flex;align-items:center;justify-content:center;margin:0 auto 12px;box-shadow:0 4px 12px rgba(196,69,54,.25)}
.author-name{font-family:var(--font-serif);font-size:20px;font-weight:700;color:var(--color-text);margin-bottom:4px}
.author-bio{font-size:13px;color:var(--color-text-secondary);line-height:1.6;margin-bottom:12px}
.collection-title{font-family:var(--font-serif);font-size:14px;color:var(--color-text);font-weight:600}
.year-range{display:block;font-size:12px;color:var(--color-accent);font-weight:500;margin-top:2px}

/* --- 年份过滤器按钮 --- */
.year-filters{display:flex;gap:6px;padding:14px 0;border-bottom:1px solid var(--color-border);flex-wrap:wrap}
.year-btn{flex:1;min-width:42px;padding:6px 4px;font-size:13px;font-weight:500;border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-surface);color:var(--color-text-secondary);cursor:pointer;transition:all var(--transition-fast);font-family:var(--font-sans);text-align:center}
.year-btn:hover{border-color:var(--color-accent);color:var(--color-accent)}
.year-btn.active{background:var(--color-accent);color:#fff;border-color:var(--color-accent);font-weight:600}
.year-btn[data-year="2022"].active{background:var(--color-accent-2022);border-color:var(--color-accent-2022)}
.year-btn[data-year="2023"].active{background:var(--color-accent-2023);border-color:var(--color-accent-2023)}
.year-btn[data-year="2024"].active{background:var(--color-accent-2024);border-color:var(--color-accent-2024)}

/* --- 侧边栏合集入口 --- */
.sidebar-collection{display:block;margin:10px 0 4px;padding:14px 12px;border-radius:var(--radius-md);background:linear-gradient(135deg,#ecf7f1,#e4f3ea);border:1px solid #b8d8c4;text-align:center;text-decoration:none;transition:all var(--transition-normal)}
.sidebar-collection:hover{border-color:#8cc4a0;box-shadow:0 2px 12px rgba(26,107,75,.12);transform:translateY(-1px)}
.sidebar-collection-icon{font-size:20px;margin-bottom:2px}
.sidebar-collection-label{font-size:11px;color:#1a6b4b;font-weight:700;letter-spacing:1px;text-transform:uppercase;margin-bottom:2px}
.sidebar-collection-name{font-family:var(--font-serif);font-size:14px;font-weight:700;color:#14523a;margin-bottom:2px}
.sidebar-collection-hint{font-size:11px;color:#3d8b64;opacity:.8}

/* --- 侧边栏公众号引流 --- */
.sidebar-wechat{margin:14px 0;padding:14px 12px;border-radius:var(--radius-md);background:linear-gradient(135deg,#f0f9e8,#ecf7e0);border:1px solid #c8e6b5;text-align:center;transition:all var(--transition-normal)}
.sidebar-wechat:hover{border-color:#a5d67a;box-shadow:0 2px 12px rgba(126,188,67,.12);transform:translateY(-1px)}
.sidebar-wechat-icon{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,#7ebc43,#5da02c);color:#fff;display:flex;align-items:center;justify-content:center;margin:0 auto 8px;box-shadow:0 3px 10px rgba(126,188,67,.3)}
.sidebar-wechat-label{font-size:11px;color:#5da02c;font-weight:700;letter-spacing:1px;text-transform:uppercase;margin-bottom:2px}
.sidebar-wechat-name{font-family:var(--font-serif);font-size:14px;font-weight:700;color:#3a6b1e;margin-bottom:2px}
.sidebar-wechat-hint{font-size:11px;color:#7ebc43;opacity:.8}

/* --- 侧边栏打赏 --- */
.sidebar-donate{margin:10px 0 14px;padding:12px 10px;border-radius:var(--radius-md);background:linear-gradient(135deg,#fef9f0,#fdf3e4);border:1px solid #e8d5b0;text-align:center;transition:all var(--transition-normal)}
.sidebar-donate:hover{border-color:#d4b88c;box-shadow:0 2px 12px rgba(196,142,60,.1)}
.sidebar-donate-icon{font-size:22px;margin-bottom:4px}
.sidebar-donate-label{font-size:11px;color:#b8860b;font-weight:600;margin-bottom:1px}
.sidebar-donate-hint{font-size:11px;color:#c9a44b;margin-bottom:8px}
.sidebar-donate-qr{width:100px;height:100px;border-radius:6px;border:1px solid #e8d5b0;background:#fff;object-fit:contain}

/* --- 导航 --- */
.sidebar-nav{flex:1;overflow-y:auto;margin-top:12px;padding-right:4px}
.sidebar-nav::-webkit-scrollbar{width:3px}
.sidebar-nav::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:3px}
.nav-list{list-style:none}
.nav-list li{margin-bottom:1px}
.nav-list a{display:flex;align-items:flex-start;gap:8px;padding:8px 10px;border-radius:var(--radius-sm);text-decoration:none;color:var(--color-text-secondary);font-size:13px;transition:all var(--transition-fast);line-height:1.5;border-left:2px solid transparent}
.nav-list a:hover{background:rgba(0,0,0,.04);color:var(--color-text)}
.nav-list a.active{background:var(--color-accent-bg);color:var(--color-accent);font-weight:600;border-left-color:var(--color-accent)}
.nav-list .nav-number{font-size:11px;color:var(--color-accent);font-weight:600;opacity:.6;min-width:20px;flex-shrink:0;text-align:right}
.nav-list .nav-year-badge{display:inline-block;font-size:10px;padding:0 5px;border-radius:8px;font-weight:500;flex-shrink:0;margin-top:1px;background:#eee;color:#999}
.nav-category{font-size:11px;letter-spacing:.5px;color:var(--color-text-light);padding:14px 10px 4px;font-weight:500;display:flex;align-items:center;gap:6px}
.nav-category:first-child{padding-top:0}
.nav-cat-count{font-size:10px;color:var(--color-text-light);background:rgba(0,0,0,.06);padding:1px 6px;border-radius:8px;letter-spacing:0;font-weight:400;opacity:.7}

/* --- 侧边栏底部 --- */
.sidebar-footer{padding-top:16px;border-top:1px solid var(--color-border);text-align:center}
.visit-counter{display:flex;align-items:center;justify-content:center;gap:5px;font-size:13px;color:var(--color-text-secondary);margin-bottom:8px}
.visit-counter strong{color:var(--color-accent);font-weight:700}
.copyright{font-size:12px;color:var(--color-text-light)}

/* ============================================
   主内容区
   ============================================ */
.main-content{flex:1;margin-left:var(--sidebar-width);min-height:100vh}

/* --- 英雄区 --- */
.hero{position:relative;height:100vh;display:flex;align-items:center;justify-content:center;text-align:center;overflow:hidden}
.hero-bg{position:absolute;inset:0;background:radial-gradient(ellipse at 30% 20%,rgba(196,69,54,.05) 0%,transparent 60%),radial-gradient(ellipse at 70% 80%,rgba(58,123,212,.04) 0%,transparent 60%)}
.hero-content{position:relative;z-index:1;padding:40px}
.hero-title{font-family:var(--font-serif);font-size:clamp(32px,5vw,52px);font-weight:700;letter-spacing:3px;margin-bottom:12px;animation:fadeInUp .8s ease both}
.hero-years{display:flex;align-items:center;justify-content:center;gap:8px;font-family:var(--font-serif);margin-bottom:10px;animation:fadeInUp .8s .1s ease both}
.hero-year{font-size:clamp(20px,3vw,26px);font-weight:600;color:var(--color-text);opacity:.4}
.hero-year-divider{color:var(--color-accent);opacity:.3;font-size:18px}
.hero-year.accent{font-size:clamp(48px,8vw,80px);font-weight:700;color:var(--color-accent);opacity:1;line-height:1}
.hero-desc{font-size:clamp(14px,2vw,17px);color:var(--color-text-secondary);animation:fadeInUp .8s .25s ease both}
.hero-scroll{position:absolute;bottom:36px;left:50%;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;gap:6px;font-size:13px;color:var(--color-text-light);animation:bounce 2s infinite}
@keyframes fadeInUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
@keyframes bounce{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(8px)}}

/* --- 年份分段标题 --- */
.year-section-title{font-family:var(--font-serif);font-size:24px;font-weight:700;color:var(--color-text);text-align:center;padding:48px 0 16px;margin:0;position:relative}
.year-section-title::after{content:'';display:block;width:40px;height:2px;background:var(--color-accent);margin:12px auto 0;opacity:.4}

/* --- 文章容器 --- */
.articles-container{padding:32px 40px 80px;max-width:calc(var(--max-content-width) + 80px);margin:0 auto}

/* --- 文章卡片 --- */
.article-card{margin-bottom:48px;padding-bottom:48px;border-bottom:1px solid var(--color-divider);opacity:0;transform:translateY(30px);transition:opacity .6s ease,transform .6s ease;scroll-margin-top:80px}
.article-card.visible{opacity:1;transform:translateY(0)}
.article-card:last-child{border-bottom:none}

.article-header{margin-bottom:28px}
.article-year-badge{display:inline-block;font-size:12px;font-weight:600;padding:2px 10px;border-radius:10px;margin-bottom:8px;letter-spacing:.5px}
.year-2022{background:#fdf2ed;color:#c44536}
.year-2023{background:#fef6ee;color:#d4843a}
.year-2024{background:#edf4fc;color:#3a7bd4}

.article-title{font-family:var(--font-serif);font-size:clamp(20px,3vw,26px);font-weight:700;color:var(--color-text);line-height:1.4;margin-bottom:8px}
.article-subtitle{font-size:15px;color:var(--color-text-secondary);line-height:1.5}
.article-meta{display:flex;flex-wrap:wrap;gap:12px;margin-top:12px;font-size:13px;color:var(--color-text-light);align-items:center}
.article-category{display:inline-block;padding:2px 10px;border-radius:10px;font-size:12px;font-weight:500;background:var(--color-accent-bg);color:var(--color-accent)}

.article-body{color:var(--color-text)}
.article-body p{margin-bottom:14px;font-size:15px;line-height:1.9;text-align:justify}
.article-body p:last-child{margin-bottom:0}

/* --- 空状态 --- */
.empty-state{text-align:center;padding:80px 20px;color:var(--color-text-light)}
.empty-state p{font-size:16px;margin-bottom:8px}
.empty-state .empty-icon{font-size:48px;margin-bottom:16px;opacity:.4}

/* --- 文章中插公众号CTA --- */
.wechat-cta{margin:40px 0;padding:32px 28px;border-radius:var(--radius-lg);background:linear-gradient(135deg,#f0f9e8 0%,#e8f5db 100%);border:1px solid #c8e6b5;text-align:center;position:relative;overflow:hidden;box-shadow:0 2px 16px rgba(126,188,67,.06)}
.wechat-cta::before{content:'';position:absolute;top:-30px;right:-30px;width:100px;height:100px;border-radius:50%;background:rgba(126,188,67,.06);pointer-events:none}
.wechat-cta::after{content:'';position:absolute;bottom:-20px;left:-20px;width:70px;height:70px;border-radius:50%;background:rgba(126,188,67,.04);pointer-events:none}
.wechat-cta-badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;color:#5da02c;background:rgba(126,188,67,.15);padding:4px 14px;border-radius:12px;letter-spacing:1px;position:relative;z-index:1;margin-bottom:12px}
.wechat-cta-name{font-family:var(--font-serif);font-size:22px;font-weight:700;color:#3a6b1e;margin-bottom:6px;position:relative;z-index:1}
.wechat-cta-desc{font-size:14px;color:#6a9b3c;position:relative;z-index:1;line-height:1.6}
.wechat-cta-action{display:inline-block;margin-top:16px;padding:10px 32px;background:linear-gradient(135deg,#7ebc43,#5da02c);color:#fff;border-radius:24px;font-size:14px;font-weight:600;cursor:pointer;border:none;transition:all var(--transition-fast);position:relative;z-index:1;text-decoration:none;box-shadow:0 4px 14px rgba(126,188,67,.3)}
.wechat-cta-action:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(126,188,67,.4)}
.wechat-cta-action:active{transform:translateY(0)}

/* --- 文章中插打赏CTA --- */
.donate-cta{margin:40px 0;padding:28px 32px;border-radius:var(--radius-lg);background:linear-gradient(135deg,#fef9f0 0%,#fdf3e4 100%);border:1px solid #e8d5b0;text-align:center;box-shadow:0 2px 16px rgba(196,142,60,.05)}
.donate-cta-header{display:flex;align-items:center;justify-content:center;gap:10px;margin-bottom:18px}
.donate-cta-icon{font-size:28px;flex-shrink:0}
.donate-cta-title{font-family:var(--font-serif);font-size:18px;font-weight:700;color:#8b6914;margin:0;line-height:1.4}
.donate-cta-subtitle{font-size:13px;color:#b8963c;margin:2px 0 0;line-height:1.5}
.donate-cta-body{display:flex;flex-direction:column;align-items:center}
.donate-cta-qr{width:160px;height:160px;border-radius:var(--radius-md);border:2px solid #e8d5b0;background:#fff;object-fit:contain;box-shadow:0 2px 8px rgba(0,0,0,.04)}
.donate-cta-hint{font-size:12px;color:#c9a44b;margin-top:8px;letter-spacing:.5px}

/* --- 页脚公众号引流 --- */
.footer-wechat{max-width:400px;margin:0 auto 32px;padding:28px 24px;border-radius:var(--radius-lg);background:linear-gradient(135deg,#f0f9e8,#ecf7e0);border:1px solid #c8e6b5;text-align:center}
.footer-wechat-badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;color:#5da02c;background:rgba(126,188,67,.15);padding:5px 14px;border-radius:12px;letter-spacing:1px;margin-bottom:10px}
.footer-wechat-name{font-family:var(--font-serif);font-size:20px;font-weight:700;color:#3a6b1e;margin-bottom:6px}
.footer-wechat-desc{font-size:13px;color:#6a9b3c;line-height:1.6}

/* --- 页脚打赏 --- */
.footer-donate{max-width:400px;margin:0 auto 32px;padding:28px 24px;border-radius:var(--radius-lg);background:linear-gradient(135deg,#fef9f0,#fdf3e4);border:1px solid #e8d5b0;text-align:center}
.footer-donate-title{font-family:var(--font-serif);font-size:18px;font-weight:700;color:#8b6914;margin-bottom:4px}
.footer-donate-desc{font-size:13px;color:#b8963c;line-height:1.7;margin-bottom:16px}
.footer-donate-qr{width:140px;height:140px;border-radius:var(--radius-md);border:2px solid #e8d5b0;background:#fff;object-fit:contain;box-shadow:0 2px 8px rgba(0,0,0,.04)}
.footer-donate-hint{font-size:12px;color:#c9a44b;margin-top:8px;letter-spacing:.5px}

/* --- 页脚 --- */
.main-footer{text-align:center;padding:60px 40px;color:var(--color-text-secondary)}
.footer-divider{width:60px;height:2px;background:var(--color-accent);opacity:.3;margin:0 auto 20px}
.main-footer p{font-family:var(--font-serif);font-size:15px;margin-bottom:6px}
.footer-sub{font-size:13px!important;color:var(--color-text-light)}

/* --- 回到顶部 --- */
.back-to-top{position:fixed;bottom:28px;right:28px;width:42px;height:42px;border-radius:50%;background:var(--color-surface);border:1px solid var(--color-border);box-shadow:var(--shadow-md);cursor:pointer;display:flex;align-items:center;justify-content:center;z-index:500;opacity:0;transform:translateY(20px);transition:all var(--transition-normal);color:var(--color-text)}
.back-to-top.visible{opacity:1;transform:translateY(0)}
.back-to-top:hover{background:var(--color-accent);color:#fff;border-color:var(--color-accent)}

/* ============================================
   移动端 (≤ 768px)
   ============================================ */
@media (max-width:768px) {
    :root{
        --sidebar-width:0;
        --color-text: #1a1a1a;
        --color-text-secondary: #555;
        --color-text-light: #888;
    }

    body{font-size:16px;line-height:1.85}

    .mobile-header{display:flex;height:56px;padding:0 16px}
    .mobile-title{font-size:17px}

    .app-container{display:block}

    /* 侧边栏 → 抽屉 */
    .sidebar{position:fixed;left:0;top:0;width:288px;height:100vh;height:100dvh;transform:translateX(-100%);transition:transform var(--transition-normal);z-index:850;padding:24px 18px;padding-top:68px}
    .sidebar.open{transform:translateX(0)}

    .sidebar-header{padding-bottom:20px}
    .author-avatar{width:48px;height:48px;font-size:22px;margin-bottom:14px}
    .author-name{font-size:19px}
    .author-bio{font-size:14px;line-height:1.7;color:var(--color-text-secondary)}
    .collection-title{font-size:15px}
    .year-range{font-size:13px}

    .year-filters{padding:12px 0}
    .year-btn{font-size:13px;padding:7px 6px}

    .sidebar-wechat{margin:12px 0;padding:16px 14px}
    .sidebar-wechat-name{font-size:15px}
    .sidebar-wechat-hint{font-size:12px}

    .sidebar-collection{margin:8px 0 4px;padding:16px 14px}
    .sidebar-collection-name{font-size:15px}
    .sidebar-collection-hint{font-size:12px}

    .sidebar-donate{margin:8px 0 14px;padding:14px 12px}
    .sidebar-donate-qr{width:90px;height:90px}
    .sidebar-donate-label{font-size:12px}
    .sidebar-donate-hint{font-size:11px}

    .nav-list a{font-size:14px;padding:10px 12px;line-height:1.6}
    .nav-list .nav-number{font-size:12px}
    .nav-category{font-size:12px;padding:16px 12px 6px}

    .sidebar-footer{padding-top:20px}
    .visit-counter{font-size:14px}
    .copyright{font-size:13px}

    .main-content{margin-left:0;padding-top:56px}

    /* 英雄区 */
    .hero{height:80vh;height:80dvh;padding:0 24px}
    .hero-content{padding:24px}
    .hero-title{font-size:30px;letter-spacing:2px}
    .hero-year{font-size:19px}
    .hero-year.accent{font-size:58px}
    .hero-desc{font-size:16px;color:var(--color-text-secondary)}
    .hero-scroll{bottom:28px;font-size:14px}

    /* 文章容器 */
    .articles-container{padding:24px 20px 80px}
    .year-section-title{font-size:22px;padding:40px 0 14px}

    .article-card{padding-bottom:40px;margin-bottom:12px}
    .article-title{font-size:21px;line-height:1.35;margin-bottom:10px}
    .article-subtitle{font-size:15px}
    .article-meta{font-size:13px;gap:10px;margin-top:10px}
    .article-category{font-size:12px}

    .article-body p{font-size:16px;line-height:2.05;margin-bottom:16px;color:var(--color-text);text-align:justify}

    .back-to-top{bottom:24px;right:20px;width:44px;height:44px}

    .wechat-cta{margin:20px 0 40px;padding:28px 20px}
    .wechat-cta-name{font-size:20px}
    .wechat-cta-desc{font-size:14px}
    .wechat-cta-action{font-size:14px;padding:12px 36px}

    .donate-cta{margin:24px 0;padding:24px 18px}
    .donate-cta-title{font-size:17px}
    .donate-cta-subtitle{font-size:13px}
    .donate-cta-qr{width:140px;height:140px}

    .main-footer{padding:48px 24px}
    .footer-wechat{padding:28px 20px;margin-bottom:28px}
    .footer-wechat-name{font-size:19px}
    .footer-wechat-desc{font-size:14px}
    .footer-donate{padding:24px 18px;margin-bottom:28px}
    .footer-donate-title{font-size:17px}
    .footer-donate-desc{font-size:13px}
    .footer-donate-qr{width:130px;height:130px}
    .main-footer p{font-size:16px}
    .footer-sub{font-size:14px!important}

    .empty-state{padding:60px 20px}
}

/* --- 小屏 (≤ 480px) --- */
@media (max-width:480px) {
    .hero{height:70vh;height:70dvh}
    .hero-title{font-size:26px}
    .hero-year.accent{font-size:48px}
    .hero-year{font-size:17px}
    .hero-desc{font-size:15px}

    .articles-container{padding:20px 16px}
    .year-section-title{font-size:20px;padding:32px 0 12px}

    .article-card{padding-bottom:36px}
    .article-title{font-size:19px}
    .article-body p{font-size:16px;line-height:2.0;text-align:justify}

    .back-to-top{bottom:20px;right:16px;width:40px;height:40px}
    .main-footer{padding:40px 20px}

    .wechat-cta{margin:16px 0 36px;padding:24px 16px}
    .wechat-cta-name{font-size:18px}
    .wechat-cta-desc{font-size:13px}
    .wechat-cta-action{padding:10px 28px}

    .footer-wechat{padding:24px 16px}
    .footer-wechat-name{font-size:18px}
    .footer-wechat-desc{font-size:13px}

    .year-btn{font-size:13px;padding:7px 4px}

    .donate-cta{padding:20px 14px}
    .donate-cta-title{font-size:16px}
    .donate-cta-qr{width:128px;height:128px}
    .footer-donate{padding:20px 14px}
    .footer-donate-qr{width:120px;height:120px}
}