/* 17c digital discussion terminal — responsive UI */
:root{--red:#d92338;--red-d:#b7192c;--ink:#1e293b;--nav:#1a202c;--night:#0d1117;--muted:#64748b;--light:#f4f6f9;--sub:#eaeef3;--border:#dbe1e8;--green:#00c853;--white:#fff;--shadow:0 2px 9px rgba(18,32,46,.055)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--light);color:var(--ink);font:15px/1.66 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",Arial,sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}a:hover{color:var(--red)}button,input,select,textarea{font:inherit}button{cursor:pointer}img{max-width:100%;height:auto}h1,h2,h3,p{margin-top:0}h1,h2,h3{line-height:1.35;letter-spacing:-.025em}h1{font-size:clamp(26px,3vw,36px);font-weight:850}h2{font-size:19px;font-weight:800}h3{font-size:17px;font-weight:780}p{color:#516074}small,.subtle{color:var(--muted)}.wide{max-width:1250px;margin-left:auto;margin-right:auto;padding-left:20px;padding-right:20px}.skip{position:absolute;top:-80px;left:10px;background:white;z-index:100;padding:12px}.skip:focus{top:10px}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #ffab40;outline-offset:3px}.site-header{background:var(--nav);color:#fff;position:relative;z-index:10}.header-inner{max-width:1250px;padding:0 20px;margin:auto;min-height:72px;display:flex;align-items:center;gap:32px}.brand{display:inline-flex;align-items:center;gap:9px;color:white;white-space:nowrap}.brand:hover{color:white}.brand img{width:39px;height:39px;object-fit:contain}.brand>span{font-size:29px;letter-spacing:-2px;font-weight:900}.brand>small{font-size:11px;color:#94a3b8;letter-spacing:1px;border-left:1px solid #465064;padding-left:10px;margin-left:3px}.primary-nav{display:flex;gap:4px;margin-left:auto;align-items:center}.primary-nav a{display:inline-flex;align-items:center;min-height:72px;padding:0 19px;color:#d9dee8;font-weight:700;font-size:14px;border-bottom:3px solid transparent}.primary-nav a:hover,.primary-nav a[aria-current=page]{background:#242d3b;color:white;border-bottom-color:var(--red)}.nav-toggle{display:none;background:transparent;border:1px solid #4c5868;border-radius:4px;width:41px;height:39px;padding:9px;margin-left:auto}.nav-toggle span{display:block;height:2px;background:white;margin:4px 0}.mobile-nav[hidden]{display:none}.mobile-nav{padding:8px 20px 14px;background:#252d3a;border-top:1px solid #3b4554}.mobile-nav a{display:block;padding:11px 4px;color:white;border-bottom:1px solid #364354}.utility-strip{background:#e7ecf2;border-bottom:1px solid #d5dce6;font-size:12px;color:#64748b}.utility-strip .wide{display:flex;gap:12px;align-items:center;min-height:38px}.utility-strip strong{color:#263448}.utility-strip a{margin-left:auto;font-weight:700;color:#a51d2f}.signal-dot{width:7px;height:7px;flex:none;border-radius:50%;background:var(--green);box-shadow:0 0 0 4px #00c8531f}.homepage{padding-top:18px;padding-bottom:36px}.intro-row{display:flex;justify-content:space-between;align-items:center;gap:20px;padding-bottom:15px}.eyebrow{font-size:11px;letter-spacing:1.25px;font-weight:900;color:var(--red);text-transform:uppercase;margin-bottom:5px}.intro-row h1{margin:0 0 7px}.intro-text{margin:0;font-size:14px}.intro-community{min-width:235px;background:var(--nav);color:white;border-left:4px solid var(--red);padding:13px 17px;display:flex;flex-direction:column;gap:0;border-radius:4px;transition:transform .2s ease}.intro-community:hover{color:white;transform:translateY(-2px)}.intro-community>span{color:#aab7c9;font-size:12px}.intro-community strong{font-size:17px}.intro-community small{font-size:11px;color:#a9b6c7}.main-grid{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(300px,1fr);align-items:start;gap:15px}.main-column,.sidebar{min-width:0;display:grid;gap:15px}.panel{background:white;border:1px solid var(--border);border-radius:5px;box-shadow:var(--shadow);overflow:hidden}.panel-heading{display:flex;gap:10px;justify-content:space-between;align-items:center;padding:13px 16px;border-bottom:1px solid var(--border)}.panel-heading h2{margin:0;font-size:18px;display:flex;align-items:center;gap:10px}.panel-heading>a{color:var(--red);font-size:12px;font-weight:700;white-space:nowrap}.panel-heading.dark{background:var(--nav);color:white;border-bottom:0}.panel-heading.dark h2{font-size:17px}.panel-heading.dark span{color:#b8c3d2;font-size:11px}.red-mark{display:block;width:4px;height:19px;background:var(--red);border-radius:1px;flex:none}.mini-tag{font-size:11px;color:#87919e;background:#f2f4f7;padding:2px 7px;border-radius:2px;white-space:nowrap}.lead-panel .feature-image{display:block;position:relative;overflow:hidden;aspect-ratio:16/8;background:#e6ecf0}.feature-image img{width:100%;height:100%;object-fit:cover;display:block}.feature-image>span{position:absolute;top:13px;left:13px;color:white;background:var(--red);font-weight:800;padding:4px 10px;font-size:11px}.feature-copy{padding:15px 18px 19px}.story-meta{display:flex;align-items:center;flex-wrap:wrap;gap:9px;color:#8290a1;font-size:11px;margin-bottom:8px;font-variant-numeric:tabular-nums}.tag{background:#fff0f2;color:#c32035;display:inline-block;padding:1px 7px;font-size:11px;font-weight:800;border-radius:2px;line-height:1.8}.feature-copy h3{font-size:23px;margin:0 0 7px}.feature-copy p{margin-bottom:9px}.text-link{font-weight:800;color:var(--red);font-size:13px}.feed-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0}.story-card{min-width:0;border-right:1px solid var(--border);border-bottom:1px solid var(--border)}.story-card:nth-child(2n){border-right:0}.story-image{display:block;aspect-ratio:16/9;position:relative;overflow:hidden;background:#e7ecf0}.story-image img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}.story-image:hover img{transform:scale(1.045)}.image-badge{position:absolute;bottom:7px;left:8px;background:#1a202ce3;color:white;padding:2px 8px;font-size:11px}.story-body{padding:13px}.story-body h3{font-size:16px;line-height:1.5;margin:0 0 8px}.story-body p{font-size:13px;margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.story-foot{border-top:1px solid #eef1f5;padding-top:9px;display:flex;gap:6px;align-items:center;justify-content:space-between;font-size:11px;color:#8692a0}.story-foot a{font-weight:750;color:var(--red)}.ranking-note{font-size:11px;margin:10px 14px;padding:8px;background:#f3f5f8;border-left:2px solid #aab2c0}.ranking-list{margin:0;padding:0 14px 7px;list-style:none}.ranking-list li{display:flex;gap:13px;align-items:start;padding:11px 0;border-bottom:1px solid #edf0f4}.ranking-list li:last-child{border-bottom:0}.rank-index{font-size:21px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;color:#a3adbb;font-weight:900;line-height:1.1;letter-spacing:-1px}.ranking-list li:nth-child(-n+3) .rank-index{color:var(--red)}.ranking-list li>div{flex:1;min-width:0}.ranking-list a{font-weight:760;font-size:13px;display:block;line-height:1.45}.ranking-list small{font-size:11px;display:block;margin-top:4px}.community-box{background:var(--nav);color:#fff;padding:23px}.community-box h2{font-size:23px;margin-bottom:10px}.community-box p:not(.eyebrow){color:#c9d1de;font-size:13px}.solid-button,.outline-button{border:1px solid transparent;border-radius:4px;display:inline-flex;justify-content:center;align-items:center;gap:7px;padding:10px 17px;min-height:42px;font-size:13px;font-weight:800;text-align:center}.solid-button{background:var(--red);color:white}.solid-button:hover{background:var(--red-d);color:white}.outline-button{border-color:#c8d1dd;background:#fff;color:#263447}.outline-button:hover{background:#eef2f6}.community-box .solid-button,.community-box .outline-button{display:flex;margin-top:10px}.community-box .outline-button{background:transparent;color:#fff;border-color:#596a7c}.tips-panel{padding:17px}.tips-panel h2{font-size:17px;margin-bottom:12px}.tips-panel>div{border-top:1px solid #e5eaf0;padding:10px 0 4px}.tips-panel b{color:var(--red);font-size:13px}.tips-panel p{font-size:12px;margin:3px 0}.digest-grid,.discussion-preview-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.digest-grid article{padding:17px;border-right:1px solid #e2e6eb}.digest-grid article:last-child{border-right:0}.digest-grid h3{font-size:17px;margin:8px 0}.digest-grid p{font-size:13px}.digest-grid a{font-size:12px;font-weight:800;color:var(--red)}.number{font-family:ui-monospace,Consolas,monospace;font-size:11px;color:#8998aa;font-weight:800}.discussion-preview{margin-top:15px}.discussion-preview-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.discussion-preview-grid article{padding:18px;border-right:1px solid #e5e9ef}.discussion-preview-grid article:last-child{border:0}.discussion-preview-grid h3{font-size:17px;margin:9px 0}.discussion-preview-grid p{font-size:13px;min-height:50px}.discussion-preview-grid a{color:var(--red);font-weight:800;font-size:12px}.site-footer{background:var(--night);color:#dce2e9;padding-top:30px}.foot-grid{display:grid;grid-template-columns:1.25fr .7fr 1.4fr;gap:35px;padding-bottom:28px}.foot-logo{display:inline-block;font-size:29px;font-weight:900;color:white;letter-spacing:-1px}.foot-logo span{font-size:12px;font-weight:500;color:#94a3b8;letter-spacing:0}.site-footer h2{font-size:14px;margin:8px 0 12px;color:#fff}.site-footer section>a:not(.foot-logo){display:block;color:#b4c0d0;margin:5px 0;font-size:13px}.site-footer p{color:#aab5c5;font-size:12px;line-height:1.85;margin-top:10px}.footer-bottom{display:flex;align-items:center;justify-content:space-between;padding-top:15px;padding-bottom:19px;border-top:1px solid #293340;font-size:11px;color:#92a1b3}.footer-bottom a{color:#cdd6e0}.breadcrumb{display:flex;gap:9px;color:#8491a1;font-size:12px;margin:16px 0}.breadcrumb a:hover{color:var(--red)}.community-page{padding-bottom:40px}.community-hero{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:10px 0 22px}.community-hero h1{margin-bottom:7px}.community-hero p:last-child{margin-bottom:0;max-width:800px}.community-shell{display:grid;grid-template-columns:minmax(0,1.75fr) minmax(270px,.72fr);gap:15px;align-items:start}.community-sidebar{display:grid;gap:15px}.topic-row{padding:16px 18px;border-bottom:1px solid #e4e9ef}.topic-row:last-child{border-bottom:0}.topic-row-info{display:flex;align-items:center;gap:12px;color:#8793a2;font-size:11px;margin-bottom:7px}.topic-row h3{font-size:18px;margin:0 0 7px}.topic-row p{font-size:13px;margin:0 0 10px}.topic-row-bottom{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:#8793a3}.topic-row-bottom a{color:var(--red);font-weight:800}.participation{padding:20px}.participation h2{font-size:18px;margin-bottom:14px}.participation p{font-size:13px;border-bottom:1px solid #eef0f3;padding-bottom:10px;margin-bottom:11px}.participation p:last-child{border-bottom:0}.participation strong{color:#34475a}.participation a{color:var(--red);font-weight:800;font-size:13px}.submit-panel{margin-top:18px;padding:25px;scroll-margin-top:16px}.submit-head h2{font-size:24px;margin-bottom:8px}.submit-head p:last-child{font-size:13px}.contribution-form{max-width:900px}.form-grid{display:grid;grid-template-columns:1.35fr .65fr;gap:14px}.contribution-form label:not(.check-line){display:block;margin:13px 0;font-weight:750;font-size:13px}.contribution-form label>span{font-weight:400;color:var(--muted);font-size:12px}.contribution-form input:not([type=checkbox]),.contribution-form textarea,.contribution-form select{width:100%;display:block;background:white;border:1px solid #cdd6e1;border-radius:4px;padding:10px 12px;margin-top:7px;color:#253447;transition:border-color .15s}.contribution-form input:focus,.contribution-form textarea:focus,.contribution-form select:focus{border-color:var(--red)}.contribution-form textarea{resize:vertical;min-height:160px}.check-line{display:flex;align-items:flex-start;gap:10px;margin:15px 0;font-size:12px}.check-line input{margin-top:6px;accent-color:var(--red)}.form-actions{display:flex;align-items:center;gap:15px}.form-actions>span{font-size:11px;color:#8793a3}.honeypot{display:none}.character-hint{display:block;text-align:right;font-size:11px;color:#8691a0}.topic-layout{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(260px,.7fr);gap:15px;align-items:start}.topic-detail{padding:26px}.topic-kicker{display:flex;gap:12px;align-items:center;color:#7a8796;font-size:12px;margin-bottom:15px}.topic-detail h1{font-size:clamp(25px,3vw,35px);margin-bottom:11px}.topic-lead{font-size:16px;line-height:1.85;border-bottom:1px solid #e6e9ee;padding-bottom:16px;margin-bottom:19px}.topic-cover{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:4px;margin-bottom:20px}.topic-detail section{margin:17px 0 24px}.topic-detail section h2{font-size:19px;margin-bottom:9px}.topic-detail section p{line-height:1.95}.question-block{background:#f4f6f9;border-left:3px solid var(--red);padding:18px 20px}.question-block ol{margin-bottom:0;padding-left:22px}.question-block li{padding:5px 0}.ethics-box{padding:15px 18px;background:#f9fafb;border:1px solid #e8edf2}.ethics-box p{margin-bottom:0;font-size:13px}.topic-actions{display:flex;gap:10px;flex-wrap:wrap}.related-panel{padding:18px}.related-panel h2{font-size:19px;margin-bottom:5px}.related-panel>a{display:block;padding:14px 0;border-bottom:1px solid #e5e9ee}.related-panel>a strong{display:block;font-size:14px;line-height:1.55}.related-panel small{font-size:11px;color:var(--red)}.side-explain{font-size:12px;color:#8291a2;margin-top:14px}.result-page{min-height:55vh;padding-top:65px;padding-bottom:65px}.result-panel{max-width:750px;padding:32px;margin:auto}.result-panel h1{font-size:29px}.result-panel p{line-height:1.9}.errors{color:#b7192c;background:#fff2f3;border:1px solid #ffd2d8;border-radius:4px;padding:16px 16px 16px 36px}.errors li{padding:4px 0}
@media (max-width:1050px){.main-grid{grid-template-columns:minmax(0,1.5fr) minmax(260px,.9fr)}.community-shell{grid-template-columns:minmax(0,1.6fr) minmax(240px,.8fr)}.topic-layout{grid-template-columns:minmax(0,1fr) 255px}.ranking-list a{font-size:12px}.feature-copy h3{font-size:21px}.story-body h3{font-size:15px}.foot-grid{gap:22px}}
@media (max-width:800px){.wide{padding-left:15px;padding-right:15px}.main-grid,.community-shell,.topic-layout{grid-template-columns:1fr}.sidebar{grid-template-columns:repeat(2,minmax(0,1fr));align-items:start}.ranking-panel{grid-row:span 2}.tips-panel{grid-column:2}.community-sidebar{grid-template-columns:repeat(2,minmax(0,1fr))}.related-panel{margin-top:0}.primary-nav a{padding:0 12px}.brand>small{display:none}.foot-grid{grid-template-columns:1fr 1fr}.foot-grid section:last-child{grid-column:1/-1}.ranking-list li{padding:9px 0}.discussion-preview-grid article{padding:13px}}
@media (max-width:680px){.header-inner{min-height:62px;gap:10px}.primary-nav{display:none}.nav-toggle{display:block}.utility-strip .wide{font-size:11px;gap:8px}.utility-strip .wide>span:not(.signal-dot){display:none}.intro-row,.community-hero{display:block}.intro-community{margin-top:15px;min-width:auto;max-width:none}.community-hero>.solid-button{margin-top:16px}.sidebar,.community-sidebar{grid-template-columns:1fr}.ranking-panel{grid-row:auto}.tips-panel{grid-column:auto}.feed-grid{grid-template-columns:1fr}.story-card{border-right:0}.story-card{display:grid;grid-template-columns:35% 1fr}.story-image{height:100%;aspect-ratio:auto;min-height:160px}.story-body{padding:12px}.story-body p{-webkit-line-clamp:2}.story-foot{flex-wrap:wrap}.feature-image{aspect-ratio:16/10}.discussion-preview-grid,.digest-grid{grid-template-columns:1fr}.digest-grid article,.discussion-preview-grid article{border-right:0;border-bottom:1px solid #e5e9ef}.discussion-preview-grid p{min-height:auto}.form-grid{grid-template-columns:1fr;gap:0}.submit-panel{padding:18px}.foot-grid{grid-template-columns:1fr;gap:10px}.foot-grid section:last-child{grid-column:auto}.topic-detail{padding:19px}.intro-row h1{font-size:27px}.result-page{padding-top:35px}.result-panel{padding:22px}}
@media (max-width:420px){.wide{padding-left:12px;padding-right:12px}.feature-copy{padding:13px}.feature-copy h3{font-size:19px}.panel-heading{padding:11px 12px}.panel-heading h2{font-size:16px}.panel-heading .mini-tag{font-size:10px}.story-body h3{font-size:14px}.story-card{grid-template-columns:37% 1fr}.story-body{padding:9px}.story-image{min-height:165px}.story-meta{gap:5px}.story-body p{font-size:12px;margin-bottom:6px}.topic-row{padding:14px}.topic-row h3{font-size:16px}.footer-bottom{gap:9px;align-items:start}.topic-actions .solid-button,.topic-actions .outline-button{flex:1}.intro-row h1{font-size:25px}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}}