:root{--primary-color:#e60012;--bg-color:#fff;--text-color:#333;--text-light:#666;--border-color:#e5e5e5;--hover-bg:#f8f8f8;--shadow:0 2px 8px rgba(0, 0, 0, 0.1)}body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif;background:var(--bg-color);color:var(--text-color);line-height:1.6}*{box-sizing:border-box}a{color:var(--primary-color);text-decoration:none;transition:all .2s ease}a:hover{opacity:.8}header{position:sticky;top:0;z-index:100;background:var(--bg-color);box-shadow:var(--shadow)}header nav{display:flex;flex-wrap:nowrap;justify-content:space-between;align-items:center;padding:.5rem;max-width:1400px;margin:0 auto}header nav a{flex:1 1 0;min-width:0;text-align:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;padding:.5rem .25rem;font-size:.85rem;font-weight:500;color:var(--text-color);border-radius:4px}header nav a.active,header nav a:hover{background:var(--hover-bg);color:var(--primary-color)}@media (min-width:768px){header nav{padding:1rem 2rem}header nav a{flex:0 1 auto;padding:.75rem 1.5rem;font-size:1rem}}main{max-width:1400px;margin:0 auto;padding:1rem}@media (min-width:768px){main{padding:2rem}}.breadcrumb{padding:.75rem 0;font-size:.875rem;color:var(--text-light);margin-bottom:1rem}.breadcrumb a{color:var(--text-light)}.breadcrumb a:hover{color:var(--primary-color)}section{margin-bottom:3rem}h1{font-size:1.75rem;font-weight:700;margin:0 0 1rem 0;line-height:1.2;color:var(--text-color)}@media (min-width:768px){h1{font-size:2.25rem}}h2{font-size:1.4rem;font-weight:600;margin:0 0 1rem 0;color:var(--text-color)}h3{font-size:1.1rem;font-weight:600;margin:0 0 .5rem 0;line-height:1.3}.intro{font-size:1rem;line-height:1.8;color:var(--text-light);margin-bottom:1.5rem}.video-grid{display:grid;grid-template-columns:1fr;gap:1rem}@media (min-width:480px){.video-grid{grid-template-columns:repeat(2,1fr)}}@media (min-width:768px){.video-grid{grid-template-columns:repeat(3,1fr);gap:1.25rem}}@media (min-width:1024px){.video-grid{grid-template-columns:repeat(4,1fr);gap:1.5rem}}.video-card{background:var(--bg-color);border:1px solid var(--border-color);border-radius:8px;padding:1rem;transition:all .3s ease}.video-card:hover{box-shadow:var(--shadow);transform:translateY(-2px)}.video-card h3{margin-bottom:.5rem}.video-card h3 a{color:var(--text-color)}.video-card h3 a:hover{color:var(--primary-color)}.video-card .meta{font-size:.875rem;color:var(--text-light);margin:.25rem 0}.video-card .tags{font-size:.8rem;color:var(--text-light);margin:.5rem 0}.video-card .oneline{font-size:.9rem;color:var(--text-light);line-height:1.5;margin:.5rem 0 0 0}.video-card .summary{font-size:.85rem;color:var(--text-light);line-height:1.6;margin-top:.5rem}.video-card.ranked{position:relative;padding-left:3.5rem}.video-card .rank{position:absolute;left:1rem;top:1rem;font-size:1.5rem;font-weight:700;color:var(--primary-color)}.video-card.topic-card .tags{background:var(--hover-bg);padding:.25rem .5rem;border-radius:4px;display:inline-block;font-size:.75rem}.video-card.latest-card .meta strong{color:var(--primary-color)}.entry-links{display:grid;grid-template-columns:1fr;gap:1rem}@media (min-width:768px){.entry-links{grid-template-columns:repeat(2,1fr);gap:1.5rem}}.entry-card{display:block;background:var(--bg-color);border:2px solid var(--border-color);border-radius:8px;padding:2rem;text-align:center;transition:all .3s ease}.entry-card:hover{border-color:var(--primary-color);box-shadow:var(--shadow)}.entry-card h3{font-size:1.3rem;margin-bottom:.75rem;color:var(--primary-color)}.entry-card p{color:var(--text-light);font-size:.95rem;margin:0}.more-link{text-align:center;margin-top:1.5rem;font-size:1rem}.more-link a{color:var(--primary-color);font-weight:500}.hero{text-align:center;padding:2rem 0;margin-bottom:2rem}@media (min-width:768px){.hero{padding:3rem 0}}.detail-page header{margin-bottom:2rem;padding-bottom:1rem;border-bottom:2px solid var(--border-color)}.detail-page h1{margin-bottom:.75rem}.detail-page .meta{font-size:1rem;color:var(--text-light);margin:.5rem 0}.detail-page .tags{font-size:.875rem;color:var(--text-light);margin:.5rem 0}.detail-page section{margin-bottom:2rem}.detail-page section h2{font-size:1.3rem;margin-bottom:1rem;padding-bottom:.5rem;border-bottom:1px solid var(--border-color)}.detail-page section p{font-size:1rem;line-height:1.8;color:var(--text-color)}.detail-oneline{background:var(--hover-bg);padding:1.5rem;border-radius:8px;border-left:4px solid var(--primary-color)}.detail-oneline p{font-size:1.1rem;font-weight:500;margin:0}.detail-summary p{text-align:justify}.detail-review{background:#fffbf0;padding:1.5rem;border-radius:8px;border-left:4px solid orange}.detail-review p{font-style:italic;margin:0}.error-page{text-align:center;padding:4rem 1rem}.error-page h1{font-size:2rem;margin-bottom:1rem}.error-page p{font-size:1.1rem;color:var(--text-light);margin:1rem 0}footer{background:var(--hover-bg);padding:2rem 1rem;text-align:center;margin-top:4rem;border-top:1px solid var(--border-color)}footer p{margin:0;font-size:.9rem;color:var(--text-light)}footer a{color:var(--text-light);margin:0 .5rem}footer a:hover{color:var(--primary-color)}.list-page .intro{background:var(--hover-bg);padding:1rem;border-radius:8px;margin-bottom:2rem}.list-page .intro a{font-weight:500}