:root{
  /* 医疗蓝主色板 - Medical Blue Palette */
  --teal: #1E6FB7;        /* 主色(医疗蓝-Mayo Clinic风) */
  --teal-deep: #154E85;   /* 深色(按钮/导航条底) */
  --teal-light: #E7F0FB;  /* 浅色(表格标题/浅色底) */
  --teal-soft: #B8D0EB;   /* 柔色(边框/强调线) */
  --orange: #2E9B5B;      /* 医疗绿色：代替原橙色，用作CTA成功/紧急正向 */
  --orange-deep: #206F41;
  --logo-red: #154E85;    /* Logo徽标蓝(原红换医疗深蓝) */
  --logo-red-deep: #0F3B66;
  --bg: #F4F8FC;
  --bg-card: #FFFFFF;
  --border: #DCE5F0;
  --border-soft: #EEF3F9;
  --ink: #11263F;
  --text: #1F3A5C;
  --text-muted: #5A6F89;
  --text-soft: #8A9BB0;
  --text-link: #1E6FB7;
  --text-link-hover: #154E85;
  --post-link: #3478B8;
  --status-commercial: #2E9B5B;   /* 商业合法=绿 */
  --status-altruistic: #6BAA2E;   /* 利他合法=浅绿 */
  --status-gray: #C28B2E;         /* 灰色地带=琥珀 */
  --status-restricted: #D27036;   /* 限外=橘 */
  --status-prohibited: #C0392B;   /* 禁止=医疗红色警报 */
  --font-display: "Noto Serif TC", "PingFang TC", "Microsoft JhengHei", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "PingFang TC", "Microsoft JhengHei", "Helvetica Neue", sans-serif;
  --max-content: 1200px;
  /* 核心Web Vitals辅助变量 */
  --ease-standard: cubic-bezier(.2,.7,.2,1);
  --content-reader: 72ch
}

/* Google Fonts display:swap 防止 FOIT 阻塞渲染 (繁体 TC) */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+TC:wght@400;500;700;900&family=Cormorant+Garamond:ital,wght@0,400;0,500;0,600;0,700;1,400&family=Inter:wght@300;400;500;600;700&display=swap');
.font-display,.hero h1,.hero-banner-content h1,.about-stat .num,.brand-badge,.thread-title{font-family:"Noto Serif TC",var(--font-display);font-display:swap}

*{box-sizing:border-box;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;margin:0;padding:0}
html{scroll-behavior:smooth;text-size-adjust:100%}
html,body{overflow-x:hidden}
body{font-family:var(--font-body);color:var(--text);background:var(--bg);line-height:1.7;font-size:14px;min-height:100dvh;contain-intrinsic-size:100vw auto}
a{color:var(--text-link);text-decoration:none;transition:color .15s var(--ease-standard)}
a:hover{color:var(--text-link-hover)}
:focus-visible{outline:2px solid var(--teal);outline-offset:2px;border-radius:3px}
/* 图片 LCP/CLS 安全：aspect-ratio + 懒加载渐进式 */
img{max-width:100%;height:auto;display:block;background:var(--border-soft);content-visibility:auto;contain-intrinsic-size:1px 1px}
img[width][height]{aspect-ratio:attr(width)/attr(height)}
img[loading="lazy"]{opacity:0;transition:opacity .25s var(--ease-standard)}
img[loading="lazy"].loaded{opacity:1}
picture{display:block;contain:paint style layout}
video,iframe{max-width:100%}

/* Header */
.site-header{background:var(--teal);border-bottom:4px solid var(--teal-deep)}
.site-header-inner{max-width:var(--max-content);margin:0 auto;padding:0;display:flex;align-items:stretch;height:64px}
.brand-badge{background:var(--logo-red);color:#fff;padding:8px 18px;display:flex;flex-direction:column;justify-content:center;font-family:var(--font-display);font-weight:800;letter-spacing:.05em;box-shadow:3px 3px #0000001f;margin-right:6px;position:relative;z-index:2}
.brand-badge .brand-cn{font-size:22px;line-height:1.1}
.brand-badge .brand-en{font-size:11px;font-weight:500;letter-spacing:.06em;margin-top:2px;opacity:.95}
.nav-tabs{display:flex;align-items:stretch;flex:1}
.nav-tab-wrap{position:relative;display:flex;align-items:stretch}
.nav-tab{display:inline-flex;align-items:center;gap:4px;padding:0 26px;color:#fff;font-size:16px;font-weight:500;letter-spacing:.02em;transition:background .15s;position:relative;height:100%}
.nav-tab .nav-tab-arrow{font-size:10px;margin-left:2px;opacity:.7;transition:transform .15s}
.nav-tab-wrap.has-dropdown:hover .nav-tab-arrow{transform:rotate(180deg)}
.nav-tab:hover{color:#fff;background:#0000000f}
.nav-tab.current{background:var(--teal-deep);color:#fff}
.nav-dropdown{position:absolute;top:100%;left:0;min-width:280px;background:#fff;border:1px solid var(--border);border-radius:0 0 4px 4px;box-shadow:0 8px 24px #00000026;padding:12px 0;opacity:0;visibility:hidden;transform:translateY(-6px);transition:opacity .15s,transform .15s,visibility .15s;z-index:100}
.nav-tab-wrap.has-dropdown:hover .nav-dropdown,.nav-tab-wrap.has-dropdown:focus-within .nav-dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.nav-dropdown-group{padding:4px 0;border-bottom:1px dashed var(--border-soft)}
.nav-dropdown-group:last-of-type{border-bottom:none}
.nav-dropdown-group-label{font-size:10px;font-weight:700;color:var(--text-soft);letter-spacing:.18em;padding:6px 18px 4px;text-transform:uppercase}
.nav-dropdown-group ul{list-style:none;padding:0;margin:0}
.nav-dropdown-group li a{display:flex;align-items:center;justify-content:space-between;padding:8px 18px;font-size:14px;color:var(--text);transition:background .12s,color .12s}
.nav-dropdown-group li a:hover{background:var(--teal-light);color:var(--teal-deep)}
.nav-dropdown-hot{font-size:10px;font-weight:700;letter-spacing:.05em;color:#fff;background:var(--orange);padding:1px 6px;border-radius:2px}
.nav-dropdown-foot{padding:10px 18px 0;border-top:1px solid var(--border-soft);margin-top:4px}
.nav-dropdown-foot a{display:block;background:var(--orange);color:#fff!important;text-align:center;padding:8px;font-size:13px;font-weight:700;letter-spacing:.05em;border-radius:3px}
.nav-dropdown-foot a:hover{background:var(--orange-deep)}
.header-right{display:flex;align-items:center;padding:0 18px 0 8px;gap:12px}
.header-menu-icon{width:32px;height:32px;background:#ffffff2e;color:#fff;display:flex;align-items:center;justify-content:center;font-size:18px;cursor:pointer;border-radius:3px;border:none}
.header-search{display:flex;align-items:stretch;background:#fff;border-radius:3px;overflow:hidden;height:36px;box-shadow:0 2px 4px #0000000f}
.header-search input{border:none;outline:none;padding:0 12px;font-size:13px;color:var(--text);width:200px;font-family:inherit}
.header-search input::placeholder{color:var(--text-soft)}
.header-search button{background:var(--teal);border:none;color:#fff;width:36px;cursor:pointer;font-size:14px;display:flex;align-items:center;justify-content:center}
.header-search button:hover{background:var(--teal-deep)}

/* Hero Section */
.hero-row{max-width:var(--max-content);margin:16px auto 0;padding:0 16px;display:grid;grid-template-columns:1fr 420px;gap:16px}
.hero-banner{background:linear-gradient(135deg,#1F2D2C,#2C3E3D);border-radius:4px;overflow:hidden;position:relative;height:380px;display:flex;align-items:center;justify-content:center}
.hero-banner-content{text-align:center;color:#fff;padding:32px}
.hero-banner-content h1{font-size:32px;font-weight:700;margin-bottom:16px;font-family:var(--font-display)}
.hero-banner-content p{font-size:16px;opacity:.9;line-height:1.8;max-width:600px;margin:0 auto}
.hero-banner-dots{position:absolute;bottom:12px;left:50%;transform:translate(-50%);display:flex;gap:8px;z-index:2}
.hero-banner-dots .dot{width:10px;height:10px;border-radius:50%;background:#fff6;border:1px solid rgba(255,255,255,.7);cursor:pointer;transition:background .15s}
.hero-banner-dots .dot.active{background:var(--teal);border-color:#fff}

.recent-panel{background:#fff;border:1px solid var(--border);border-radius:4px;display:flex;flex-direction:column}
.recent-tabs{display:flex;border-bottom:2px solid var(--teal);background:#fafcfc}
.recent-tab{padding:14px 18px;font-size:14px;color:var(--text-muted);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-2px;font-weight:500}
.recent-tab.active{color:var(--teal-deep);font-weight:700;border-bottom-color:var(--teal-deep)}
.recent-list{list-style:none;padding:8px 0;margin:0;flex:1}
.recent-list li{padding:9px 18px;display:flex;align-items:center;gap:12px;font-size:14px;border-bottom:1px dashed var(--border-soft)}
.recent-list li:last-child{border-bottom:none}
.recent-list .item-num{width:20px;height:20px;flex-shrink:0;background:var(--text-soft);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700}
.recent-list li:nth-child(-n+3) .item-num{background:var(--orange)}
.recent-list .item-title{flex:1;min-width:0;color:var(--post-link);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.recent-list .item-title:hover{color:var(--teal-deep)}
.recent-list .item-date{font-size:12px;color:var(--text-soft);flex-shrink:0}

.stats-row{max-width:var(--max-content);margin:14px auto 0;padding:0 16px;display:grid;grid-template-columns:1fr 420px;gap:16px;align-items:center}
.stats-card{background:#fff;border:1px solid var(--border);border-radius:4px;padding:14px 20px;display:flex;flex-wrap:wrap;gap:24px;align-items:center;font-size:14px}
.stats-card .stat-item{display:flex;align-items:center;gap:6px;color:var(--text-muted)}
.stats-card .stat-item .stat-icon{width:20px;height:20px;background:var(--teal-light);border-radius:3px;display:flex;align-items:center;justify-content:center;color:var(--teal-deep);font-size:11px}
.stats-card strong{color:var(--ink);font-weight:700;font-size:15px}
.stats-card .welcome{margin-left:auto;color:var(--text-muted);font-size:13px}
.stats-card .welcome strong{color:var(--teal-deep)}

.cta-stack{display:flex;flex-direction:column;gap:10px}
.cta-btn{display:flex;align-items:center;justify-content:center;gap:8px;height:52px;font-size:16px;font-weight:700;letter-spacing:.05em;border-radius:4px;color:#fff;transition:opacity .15s,transform .1s}
.cta-btn:hover{color:#fff;opacity:.92}
.cta-btn:active{transform:translateY(1px)}
.cta-btn.orange{background:var(--orange)}
.cta-btn.orange:hover{background:var(--orange-deep)}
.cta-btn.teal{background:var(--teal)}
.cta-btn.teal:hover{background:var(--teal-deep)}

/* Forum Section */
.forum-section{max-width:var(--max-content);margin:18px auto 0;padding:0 16px}
.section-header{display:flex;align-items:center;background:linear-gradient(180deg,#fafcfc,#f2f6f7);border:1px solid var(--border);border-radius:4px 4px 0 0;padding:0 16px;height:44px;gap:10px}
.section-header .section-icon-box{width:26px;height:26px;display:flex;align-items:center;justify-content:center;border-radius:3px;color:#fff;font-weight:700;font-size:14px;flex-shrink:0}
.section-header .section-icon-box.commercial{background:var(--status-commercial)}
.section-header .section-icon-box.altruistic{background:var(--status-altruistic)}
.section-header .section-icon-box.gray{background:var(--status-gray)}
.section-header .section-icon-box.restricted{background:var(--status-restricted)}
.section-header .section-icon-box.prohibited{background:var(--status-prohibited)}
.section-header .section-icon-box.condition{background:var(--post-link)}
.section-header.vivid{height:auto;padding:16px 22px;border:none;border-radius:4px 4px 0 0;color:#fff;position:relative;overflow:hidden}
.section-header.vivid:after{content:"";position:absolute;right:-40px;top:-40px;width:160px;height:160px;background:#ffffff14;border-radius:50%;pointer-events:none}
.section-header.vivid h2{color:#fff;font-size:20px;font-weight:700;letter-spacing:.01em;text-shadow:0 1px 2px rgba(0,0,0,.15)}
.section-header.vivid .section-count{color:#ffffffeb;font-size:13px;margin-left:6px}
.section-header.vivid .section-link{color:#fff!important;background:#fff3;padding:5px 12px;border-radius:3px;font-weight:600}
.section-header.vivid .section-link:hover{background:#ffffff4d;text-decoration:none}
.section-icon-box-lg{width:44px;height:44px;display:flex;align-items:center;justify-content:center;background:#ffffff38;border:2px solid rgba(255,255,255,.5);border-radius:8px;font-size:22px;flex-shrink:0;box-shadow:0 2px 6px #0000001a}
.section-header.vivid-teal{background:linear-gradient(135deg,#1aaea0,#0f8b7e)}
.section-header.vivid-orange{background:linear-gradient(135deg,#f08300,#d26500)}
.section-header.vivid-burgundy{background:linear-gradient(135deg,#c42e3d,#8e1f2d)}
.section-header.vivid-gold{background:linear-gradient(135deg,#d2a86e,#a8824a)}
.section-header.vivid-navy{background:linear-gradient(135deg,#4a6f8a,#2c4d63)}
.section-header h2{font-size:16px;color:var(--ink);font-weight:700;margin:0}
.section-header .section-count{color:var(--text-muted);font-size:13px;margin-left:8px}
.section-header .section-link{margin-left:auto;color:var(--teal-deep);font-size:13px}
.section-header .section-link:hover{color:var(--teal);text-decoration:underline}

.thread-list{background:#fff;border:1px solid var(--border);border-top:none;border-radius:0 0 4px 4px}
.thread-row{display:grid;grid-template-columns:88px 1fr 100px 130px 130px;gap:16px;padding:14px 18px;border-bottom:1px solid var(--border-soft);align-items:center}
.thread-row-cond{grid-template-columns:88px 1fr 130px 130px}
.thread-row:last-child{border-bottom:none}
.thread-row:hover{background:#fafcfc}
.flag-thumb{width:72px;height:50px;display:flex;align-items:center;justify-content:center;background:#f5f8f9;border:1px solid var(--border);border-radius:3px;overflow:hidden;font-size:24px;font-weight:700;color:var(--text-muted)}
.thread-main{min-width:0}
.thread-title{font-size:16px;font-weight:600;color:var(--post-link);display:inline-block;margin-bottom:4px}
.thread-title:hover{color:var(--teal-deep)}
.thread-title .en{font-size:13px;color:var(--text-soft);font-weight:400;margin-left:6px}
.thread-brief{font-size:13px;color:var(--text-muted);line-height:1.6;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical}
.thread-region{font-size:13px;color:var(--text-soft);text-align:center}
.thread-status{text-align:center}
.thread-update{font-size:12px;color:var(--text-soft);text-align:right;line-height:1.5}
.thread-update strong{color:var(--teal-deep);font-weight:600}
.scope-bar{display:inline-flex;gap:4px;margin-top:6px}
.scope-bar .scope-chip{font-size:11px;padding:1px 6px;border-radius:2px;color:var(--text-muted);background:var(--bg);border:1px solid var(--border);display:inline-flex;align-items:center;gap:3px}
.scope-bar .scope-chip.done{color:var(--status-commercial);background:#e8f5ee;border-color:#bce0cc}
.scope-bar .scope-chip.done:before{content:"✓";font-size:10px;font-weight:700}

.cross-topics{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;padding:14px 18px;background:linear-gradient(180deg,#fafcfc,#fff);border-top:1px dashed var(--border)}
.cross-topic{display:flex;align-items:center;gap:10px;padding:10px 12px;background:#fff;border:1px solid var(--border-soft);border-radius:3px;font-size:13px;color:var(--text);transition:all .15s}
.cross-topic:hover{border-color:var(--teal);color:var(--teal-deep);box-shadow:0 2px 6px #1aaea014}
.cross-topic .topic-icon{width:24px;height:24px;flex-shrink:0;display:flex;align-items:center;justify-content:center;background:var(--teal-light);color:var(--teal-deep);border-radius:3px;font-size:12px;font-weight:700}
.cross-topic .topic-title{flex:1;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cross-topic .topic-tag{font-size:11px;color:var(--text-soft);flex-shrink:0}

/* Pills */
.pill{display:inline-block;font-size:12px;font-weight:600;letter-spacing:.02em;padding:3px 8px;border-radius:2px;color:#fff;white-space:nowrap}
.pill.commercial{background:var(--status-commercial)}
.pill.altruistic{background:var(--status-altruistic)}
.pill.gray{background:var(--status-gray)}
.pill.restricted{background:var(--status-restricted)}
.pill.prohibited{background:var(--status-prohibited)}
.pill.hot{background:var(--orange);color:#fff}
.pill.category{background:var(--post-link)}

/* Footer */
.footer-contact-strip{background:linear-gradient(180deg,#F6FBFA 0%,var(--teal-light) 100%);border-top:2px solid var(--teal);border-bottom:1px solid var(--border);padding:18px 0;margin-top:40px}
.footer-contact-inner{max-width:var(--max-content);margin:0 auto;padding:0 16px;display:flex;align-items:center;gap:24px;flex-wrap:wrap}
.fcs-brand{display:flex;flex-direction:column;gap:2px;min-width:220px}
.fcs-brand strong{font-size:16px;color:var(--ink);font-weight:700}
.fcs-brand span{font-size:12px;color:var(--text-muted)}
.fcs-cta{background:var(--orange);color:#fff!important;padding:10px 22px;border-radius:3px;font-weight:700;font-size:14px;letter-spacing:.05em;box-shadow:0 2px 6px #f0830040;margin-left:auto}
.fcs-cta:hover{background:var(--orange-deep);color:#fff}

.site-footer{background:var(--ink);color:#b8c5c4;padding:40px 0 20px;margin-top:0;font-size:13px}
.site-footer a{color:#d8e3e2}
.site-footer a:hover{color:var(--teal)}
.footer-grid{max-width:var(--max-content);margin:0 auto;padding:0 16px;display:grid;grid-template-columns:2fr repeat(3,1fr);gap:32px}
.footer-grid h4{color:#fff;font-size:13px;letter-spacing:.15em;margin-bottom:14px;text-transform:uppercase}
.footer-grid ul{list-style:none}
.footer-grid li{margin-bottom:6px}
.footer-bottom{border-top:1px solid #2F4140;margin-top:32px;padding:18px 16px 0;max-width:var(--max-content);margin-left:auto;margin-right:auto;display:flex;justify-content:space-between;font-size:12px;color:var(--text-soft);flex-wrap:wrap;gap:12px}

/* Generic Pages */
.container{max-width:var(--max-content);margin:0 auto;padding:0 16px}
.prose-container{max-width:880px;margin:0 auto;padding:0 16px}
.crumb{max-width:var(--max-content);margin:16px auto 0;padding:0 16px;font-size:13px;color:var(--text-soft)}
.crumb a{color:var(--text-muted)}
.crumb a:hover{color:var(--teal-deep)}
.crumb-sep{margin:0 8px;color:var(--border)}

.hero{background:#fff;border:1px solid var(--border);border-radius:4px;max-width:var(--max-content);margin:16px auto;padding:32px 28px}
.hero-tag{display:inline-block;font-size:12px;font-weight:600;letter-spacing:.1em;color:var(--teal-deep);padding:4px 10px;background:var(--teal-light);border-radius:2px;margin-bottom:16px}
.hero h1{font-size:30px;color:var(--ink);font-weight:700;line-height:1.4;margin-bottom:14px;font-family:var(--font-display)}
.hero p.excerpt{font-size:15px;color:var(--text-muted);line-height:1.85;max-width:880px}

.section{padding:32px 0}
.section-title{font-size:22px;color:var(--ink);font-weight:700;margin-bottom:8px;padding-bottom:12px;border-bottom:2px solid var(--teal)}
.section-subtitle{color:var(--text-muted);font-size:14px;margin-bottom:20px}
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.card{background:#fff;border:1px solid var(--border);border-radius:4px;padding:20px;transition:box-shadow .18s,border-color .18s;display:block;color:inherit}
.card:hover{box-shadow:0 4px 16px #1aaea01a;border-color:var(--teal);color:inherit}
.card h3{font-size:17px;color:var(--ink);margin-bottom:6px;font-weight:700}
.card p{color:var(--text-muted);font-size:13px;line-height:1.65}
.card .meta{font-size:12px;color:var(--text-soft);margin-bottom:8px;letter-spacing:.05em}

.body{max-width:880px;margin:32px auto;padding:0 16px;background:#fff;border:1px solid var(--border);border-radius:4px}
.body>*{padding-left:28px;padding-right:28px}
.body>*:first-child{padding-top:28px}
.body>*:last-child{padding-bottom:28px}
.body h2{font-size:22px;color:var(--ink);margin:32px 0 12px;font-weight:700;border-left:3px solid var(--teal);padding-left:12px}
.body h3{font-size:17px;color:var(--ink);margin:22px 0 10px;font-weight:700}
.body p{margin-bottom:14px;font-size:15px;color:var(--text);line-height:1.85}
.body strong{color:var(--ink);font-weight:700}
.body ul,.body ol{margin:0 0 18px 24px}
.body li{margin-bottom:6px}
.body em{font-style:normal;background:linear-gradient(180deg,transparent 60%,rgba(26,174,160,.25) 60%);padding:0 2px;color:var(--ink);font-weight:600}
.body table{width:100%;border-collapse:collapse;margin:16px 0;font-size:14px}
.body table th,.body table td{border:1px solid var(--border);padding:8px 12px;text-align:left;line-height:1.6}
.body table th{background:var(--teal-light);color:var(--ink);font-weight:700}
.body table tr:nth-child(2n) td{background:#fafcfc}
.body blockquote{background:#fff9e8;border-left:3px solid var(--orange);padding:12px 16px;margin:16px 0;color:var(--text);font-size:14px}
.callout{background:linear-gradient(135deg,#e6f4f3,#fff9e8);border-left:4px solid var(--orange);padding:18px 22px;margin:22px 0;border-radius:0 4px 4px 0}
.callout strong{color:var(--teal-deep)}

/* About Page */
.about-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:24px 0}
.about-stat{background:#fff;border:1px solid var(--border);border-radius:4px;padding:20px;text-align:center}
.about-stat .num{font-size:32px;font-weight:700;color:var(--teal-deep);font-family:var(--font-display)}
.about-stat .label{font-size:13px;color:var(--text-muted);margin-top:4px}

.expert-card{background:#fff;border:1px solid var(--border);border-radius:4px;padding:24px;margin-bottom:16px}
.expert-card h3{font-size:18px;color:var(--ink);margin-bottom:4px}
.expert-card .role{font-size:13px;color:var(--teal-deep);font-weight:600;margin-bottom:8px}
.expert-card .exp{font-size:12px;color:var(--orange);font-weight:600;margin-bottom:12px}
.expert-card .bio{font-size:14px;color:var(--text);line-height:1.7;margin-bottom:12px}
.expert-card .creds{font-size:12px;color:var(--text-muted);line-height:1.8}
.expert-card .creds span{display:inline-block;margin-right:12px;margin-bottom:4px}

/* Responsive */
@media(max-width:1000px){
  .hero-row,.stats-row{grid-template-columns:minmax(0,1fr)}
  .hero-banner{height:280px}
  .thread-row{grid-template-columns:72px minmax(0,1fr) 100px 110px;gap:12px;padding:12px 14px}
  .thread-row-cond{grid-template-columns:72px minmax(0,1fr) 100px;gap:12px}
  .thread-row .thread-update,.thread-row-cond .thread-update{display:none}
  .about-stats{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:20px}
}

@media(max-width:700px){
  html,body{overflow-x:hidden}
  img,pre{max-width:100%}
  .site-header-inner{height:56px;position:relative}
  .brand-badge{padding:6px 12px;margin-right:4px}
  .brand-badge .brand-cn{font-size:18px}
  .brand-badge .brand-en{font-size:9px;margin-top:1px}
  .nav-tabs{display:none;position:absolute;top:56px;left:0;right:0;width:100%;flex-direction:column;background:#fff;border-top:1px solid var(--teal-deep);box-shadow:0 6px 20px #00000026;z-index:99;max-height:calc(100vh - 56px);overflow-y:auto}
  .site-header-inner.menu-open .nav-tabs{display:flex}
  .nav-tab-wrap{width:100%;display:block}
  .nav-tab{width:100%;padding:14px 18px;color:var(--text);font-size:15px;height:auto;justify-content:space-between;border-bottom:1px solid var(--border-soft)}
  .nav-tab:hover,.nav-tab.current{background:var(--teal-light);color:var(--teal-deep)}
  .nav-dropdown{position:static;width:100%;min-width:0;opacity:1;visibility:visible;transform:none;background:#fafcfc;box-shadow:none;border:none;border-bottom:1px solid var(--border-soft);padding:6px 0}
  .nav-dropdown-group-label{padding:6px 28px 4px}
  .nav-dropdown-group li a{padding:10px 28px;font-size:14px}
  .nav-dropdown-foot{padding:10px 28px 4px}
  .header-right{margin-left:auto;padding:0 12px 0 4px;gap:8px}
  .header-menu-icon{width:38px;height:38px;font-size:22px;border:none;cursor:pointer;font-family:inherit}
  .header-search{display:none}
  .hero-banner{height:200px}
  .recent-tab{padding:10px 12px;font-size:13px}
  .recent-list li{padding:8px 14px;font-size:13px;gap:8px}
  .recent-list .item-title{font-size:13px}
  .recent-list .item-date{font-size:11px}
  .stats-row{padding:0 12px}
  .stats-card{gap:10px 16px;font-size:12px;padding:12px 14px}
  .stats-card strong{font-size:13px}
  .stats-card .welcome{width:100%;margin-left:0;text-align:center;padding-top:6px;border-top:1px dashed var(--border-soft)}
  .cta-stack{padding:0 12px;flex-direction:column;gap:8px}
  .cta-btn{padding:12px 16px;font-size:13px;height:auto}
  .section-header{padding:12px 14px;flex-wrap:wrap;height:auto}
  .section-header h2{font-size:15px}
  .section-header .section-count{display:none}
  .section-header .section-link{font-size:12px;margin-left:auto;flex-basis:auto}
  .section-icon-box{width:32px;height:32px;font-size:16px}
  .thread-row,.thread-row-cond{grid-template-columns:56px minmax(0,1fr) 80px;gap:8px;padding:10px 12px}
  .thread-row-cond .flag-thumb{width:48px!important;height:48px!important;font-size:20px!important}
  .thread-row-cond .thread-title{font-size:14px;line-height:1.4;word-break:break-word}
  .thread-row .thread-region{display:none}
  .thread-row .flag-thumb{width:52px;height:36px}
  .thread-row .thread-title{font-size:14px}
  .thread-row .thread-brief{font-size:12px}
  .thread-row .thread-status .pill{font-size:10px;padding:1px 6px}
  .cross-topics{grid-template-columns:1fr;gap:8px;padding:12px}
  .cross-topic{padding:8px 10px;font-size:12px}
  .cross-topic .topic-icon{width:20px;height:20px;font-size:11px}
  .cross-topic .topic-tag{font-size:10px}
  .body h1{font-size:22px;line-height:1.4}
  .body h2{font-size:18px}
  .body h3{font-size:16px}
  .body p,.body li{font-size:14px;line-height:1.7}
  .hero{padding:18px 14px}
  .hero-tag{font-size:11px}
  .hero .excerpt{font-size:13px}
  .hero h1{font-size:22px}
  .footer-contact-inner{flex-direction:column;align-items:flex-start}
  .fcs-cta{margin-left:0}
  .about-stats{grid-template-columns:1fr 1fr}
}

@media(max-width:400px){
  .brand-badge .brand-cn{font-size:16px}
  .brand-badge .brand-en{font-size:8px}
  .stats-card .stat-item{font-size:11px}
  .hero-banner{height:180px}
  .thread-row{grid-template-columns:48px minmax(0,1fr) 60px;gap:6px;padding:9px 10px}
  .thread-row .flag-thumb{width:44px;height:32px}
  .footer-grid{grid-template-columns:1fr}
  .about-stats{grid-template-columns:1fr}
}