:root{
  --red:#94070a;        /* 北大红 */
  --red-d:#6d0507;
  --red-l:#b22a2d;
  --ink:#2b2520;
  --sub:#6a635c;
  --bg:#ffffff;
  --soft:#f6f3ee;       /* 浅暖灰 */
  --soft2:#efe9e0;
  --line:#e6e0d6;
  --gold:#9c7f43;       /* 极克制的金，仅细线 */
  --max:1440px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Noto Sans SC",system-ui,sans-serif;color:var(--ink);background:var(--bg);line-height:1.8;-webkit-font-smoothing:antialiased}
.serif{font-family:"Noto Serif SC",serif}
h1,h2,h3,h4{font-family:"Noto Serif SC",serif;line-height:1.3}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--max);margin:0 auto;padding:0 28px}

/* ---------- top utility bar (与页头同为一整块北大红) ---------- */
.topbar{background:var(--red-d);color:#f3dede;font-size:12.5px}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:36px;letter-spacing:.02em}
.topbar a{color:#f3dede;opacity:.85;transition:opacity .2s}
.topbar a:hover{opacity:1}
.topbar .r{display:flex;gap:18px}
@media(max-width:620px){.topbar .wrap span:first-child{display:none}}

/* ---------- header (白底 · 校徽 + 院名) ---------- */
.header{background:var(--bg);border-bottom:3px solid var(--red)}
.header .wrap{display:flex;align-items:center;gap:18px;padding:18px 28px}
.emblem{width:58px;height:58px;flex:none;display:block}
.school .inst{display:block;font-size:12px;color:var(--sub);letter-spacing:.04em;margin-bottom:4px}
.school b{font-family:"Noto Serif SC",serif;font-size:23px;font-weight:700;color:var(--red);letter-spacing:.02em;display:block;line-height:1.2}
.school span{font-size:11.5px;color:var(--sub);letter-spacing:.16em;text-transform:uppercase}
.header .spacer{margin-left:auto}
.h-meta{text-align:right;font-size:12.5px;color:var(--sub);line-height:1.55}
.h-meta b{display:block;font-family:"Noto Serif SC",serif;color:var(--ink);font-size:14px}
@media(max-width:760px){.h-meta{display:none}}
.hdr-auth{display:flex;align-items:center;gap:10px;margin-left:12px}
.hdr-login-btn{background:var(--red);color:#fff;border:none;border-radius:2px;padding:8px 18px;font-size:14px;font-family:inherit;cursor:pointer;transition:background .2s;white-space:nowrap}
.hdr-login-btn:hover{background:var(--red-d)}
.hdr-user-row{display:none;align-items:center;gap:10px}
.hdr-avatar{width:32px;height:32px;border-radius:50%;background:var(--red);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:15px;font-weight:700;cursor:pointer}
.hdr-uname{font-size:13.5px;color:var(--ink);cursor:pointer;max-width:140px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hdr-logout{background:none;border:1px solid var(--line);border-radius:2px;padding:5px 12px;font-size:13px;color:var(--sub);cursor:pointer;font-family:inherit;transition:all .15s}
.hdr-logout:hover{border-color:var(--red);color:var(--red)}

/* ---------- nav (北大红横向导航) ---------- */
.nav{background:var(--red);position:sticky;top:0;z-index:50;box-shadow:0 2px 10px -4px rgba(0,0,0,.3)}
.nav .wrap{display:flex;align-items:stretch;padding:0 28px;gap:2px}
.nav a{color:#fbeaea;font-size:15.5px;font-weight:500;padding:15px 26px;position:relative;transition:background .2s,color .2s;letter-spacing:.04em;cursor:pointer}
.nav a:hover{background:var(--red-d);color:#fff}
.nav a.on{background:#fff;color:var(--red);font-weight:700}
.nav a.on::after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;background:var(--gold)}
.nav .reg-link{margin-left:auto;background:var(--gold);color:#fff;font-weight:700}
.nav .reg-link:hover{background:#876c34;color:#fff}
.nav .reg-link.on{background:#fff;color:var(--red)}
@media(max-width:880px){.nav .wrap{overflow-x:auto;padding:0 12px}.nav a{padding:14px 16px;white-space:nowrap;font-size:14px}.nav .reg-link{margin-left:0}}

/* ---------- page system ---------- */
.page{display:none}
.page.active{display:block;animation:fade .4s ease}
@media(prefers-reduced-motion:reduce){.page.active{animation:none}}
@keyframes fade{from{transform:translateY(10px)}to{transform:none}}

/* breadcrumb / page banner */
.pbar{background:var(--soft);border-bottom:1px solid var(--line)}
.pbar .wrap{padding:26px 28px;display:flex;align-items:baseline;gap:16px}
.pbar h2{font-size:27px;color:var(--ink);font-weight:700}
.pbar .en{font-family:"Spectral",serif;font-style:italic;color:var(--gold);font-size:15px}
.pbar .crumb{margin-left:auto;font-size:13px;color:var(--sub)}
.pbar .crumb b{color:var(--red)}

.section{padding:56px 0}
.block-title{display:flex;align-items:center;gap:14px;margin-bottom:28px}
.block-title .bar{width:5px;height:24px;background:var(--red);flex:none}
.block-title h3{font-size:22px;font-weight:700}
.block-title .more{margin-left:auto;font-size:13px;color:var(--sub)}
.lead{font-size:16px;color:#473f38;max-width:74ch}
.lead+.lead{margin-top:16px}

/* ---------- HOME banner ---------- */
.kv{background:linear-gradient(115deg,#a30b0e 0%,var(--red) 46%,var(--red-d) 100%);color:#fff;position:relative;overflow:hidden}
.kv::before{content:"";position:absolute;inset:0;opacity:.10;background-image:repeating-linear-gradient(0deg,transparent 0 46px,rgba(255,255,255,.5) 46px 47px),repeating-linear-gradient(90deg,transparent 0 46px,rgba(255,255,255,.5) 46px 47px);mask-image:radial-gradient(120% 100% at 88% 12%,#000,transparent 72%)}
.kv::after{content:"";position:absolute;inset:0;background:radial-gradient(58% 78% at 84% 8%,rgba(255,201,138,.14),transparent 62%);pointer-events:none}
.kv .wrap{position:relative;display:grid;grid-template-columns:1.3fr .9fr;gap:40px;align-items:center;padding:64px 28px}
.kv .ey{display:inline-block;white-space:nowrap;font-size:13px;letter-spacing:.16em;border:1px solid rgba(255,255,255,.5);padding:6px 16px;border-radius:2px;margin-bottom:22px}
.kv h1{font-size:clamp(30px,4vw,50px);font-weight:900;letter-spacing:.01em;line-height:1.25}
.kv h1 em{font-style:normal;color:#f1c97a}
.kv .ksub{margin-top:16px;font-size:clamp(15px,1.7vw,18px);color:#f3d9d9;letter-spacing:.02em;max-width:30ch}
.kv .slogan{margin-top:16px;font-family:"Noto Serif SC",serif;font-size:21px;letter-spacing:.12em;color:#f3d9d9}
.kv .slogan b{color:#f1c97a;font-weight:600}
.kv .cta{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:500;padding:13px 26px;border-radius:2px;border:1.5px solid;cursor:pointer;transition:all .2s;font-family:inherit}
.btn-gold{background:var(--gold);border-color:var(--gold);color:#fff}
.btn-gold:hover{background:#fff;border-color:#fff;color:var(--red)}
.btn-line{background:transparent;border-color:rgba(255,255,255,.6);color:#fff}
.btn-line:hover{background:#fff;color:var(--red);border-color:#fff}
.kv-card{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.22);border-radius:5px;padding:26px 26px 22px;backdrop-filter:blur(3px)}
.kv-card .lbl{font-size:12px;letter-spacing:.18em;color:#f1c97a}
.kv-card h3{color:#fff;font-size:18px;margin:6px 0 16px}
.cd{display:flex;gap:9px}
.cd-u{flex:1;background:rgba(0,0,0,.18);border:1px solid rgba(255,255,255,.18);border-radius:3px;text-align:center;padding:12px 4px}
.cd-u b{font-family:"Spectral",serif;font-size:30px;color:#fff;display:block;line-height:1;font-variant-numeric:tabular-nums}
.cd-u span{font-size:10.5px;color:#e6b9b9;letter-spacing:.1em;margin-top:6px;display:block}
.kv-card .meta{margin-top:16px;font-size:12.5px;color:#f3d9d9;display:flex;justify-content:space-between;border-top:1px solid rgba(255,255,255,.2);padding-top:13px}
@media(max-width:820px){.kv .wrap{grid-template-columns:1fr;gap:30px;padding:44px 28px}}

/* home intro split */
.home-split{display:grid;grid-template-columns:1.5fr 1fr;gap:40px}
.info-box{background:var(--soft);border:1px solid var(--line);border-radius:5px;padding:26px 26px}
.info-box h4{font-size:16px;color:var(--red);margin-bottom:14px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.info-list{list-style:none;display:grid;gap:13px}
.info-list li{display:flex;gap:12px;font-size:14px;align-items:baseline}
.info-list li .k{color:var(--sub);flex:none;width:74px;font-size:12.5px}
.info-list li .v{color:var(--ink);font-weight:500}
@media(max-width:820px){.home-split{grid-template-columns:1fr;gap:30px}}

/* highlight cards (home) */
.hl{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:14px}
.hl-card{border:1px solid var(--line);border-top:3px solid var(--red);border-radius:0 0 5px 5px;padding:26px 24px;background:#fff;transition:box-shadow .25s,transform .25s}
.hl-card:hover{box-shadow:0 18px 40px -26px rgba(148,7,10,.5);transform:translateY(-3px)}
.hl-card .n{font-family:"Spectral",serif;font-size:14px;color:var(--gold);letter-spacing:.12em}
.hl-card h4{font-size:18px;margin:8px 0 10px}
.hl-card p{font-size:14px;color:var(--sub)}
@media(max-width:760px){.hl{grid-template-columns:1fr}}

/* generic 2-col cards */
.cards2{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.card{border:1px solid var(--line);border-radius:5px;background:#fff;padding:30px 30px;transition:box-shadow .25s,transform .25s}
.card:hover{box-shadow:0 18px 40px -28px rgba(148,7,10,.45);transform:translateY(-3px)}
.card .tag{font-family:"Spectral",serif;font-size:12.5px;letter-spacing:.16em;color:var(--red);font-weight:600;margin-bottom:12px}
.card h3{font-size:20px;margin-bottom:10px}
.card p{font-size:14.5px;color:var(--sub)}
@media(max-width:760px){.cards2{grid-template-columns:1fr}}

/* tracks */
.track{border:1px solid var(--line);border-radius:5px;overflow:hidden;background:#fff;transition:box-shadow .25s,transform .25s}
.track:hover{box-shadow:0 20px 44px -28px rgba(148,7,10,.5);transform:translateY(-3px)}
.track-top{padding:26px 28px;border-bottom:1px solid var(--line);background:var(--soft)}
.track .code{display:inline-block;font-family:"Spectral",serif;font-weight:600;font-size:12.5px;letter-spacing:.12em;color:#fff;background:var(--red);padding:4px 12px;border-radius:2px;margin-bottom:13px}
.track h3{font-size:21px}
.track .en{font-family:"Spectral",serif;font-style:italic;color:var(--gold);font-size:13.5px;margin-top:6px}
.track-body{padding:24px 28px 28px}
.track-body .focus{font-family:"Noto Serif SC",serif;font-weight:600;font-size:15px;margin-bottom:9px}
.track-body p{font-size:14.5px;color:var(--sub)}
.special{border:1px solid var(--red);border-radius:5px;margin-top:24px;overflow:hidden}
.special-top{background:var(--red);color:#fff;padding:22px 28px;display:flex;align-items:center;gap:18px}
.special-top .b72{font-family:"Spectral",serif;font-size:42px;font-weight:600;color:#f1c97a;line-height:1}
.special-top h3{color:#fff;font-size:20px}
.special-top .en{font-family:"Spectral",serif;font-style:italic;color:#f3d9d9;font-size:13px;margin-top:3px}
.special-body{padding:24px 28px;background:#fff}
.special-body p{font-size:14.5px;color:#473f38}

/* timeline */
.tl{border-top:1px solid var(--line)}
.tl-row{display:grid;grid-template-columns:150px 1fr;gap:30px;padding:24px 0;border-bottom:1px solid var(--line)}
.tl-wk{font-family:"Spectral",serif;color:var(--red);font-size:13px;font-weight:600}
.tl-wk b{display:block;font-family:"Noto Serif SC",serif;color:var(--ink);font-size:27px;margin-top:2px}
.tl-main h4{font-size:18px;margin-bottom:7px;display:flex;align-items:center;gap:11px}
.tl-main h4 .ph{font-family:"Spectral",serif;font-size:11.5px;letter-spacing:.12em;color:#fff;background:var(--red);padding:3px 9px;border-radius:2px;font-weight:600}
.tl-main p{font-size:14.5px;color:var(--sub);max-width:74ch}
@media(max-width:640px){.tl-row{grid-template-columns:1fr;gap:6px}}

/* enterprise assets (light, red accents) */
.assets{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.asset{border:1px solid var(--line);border-left:3px solid var(--red);border-radius:0 5px 5px 0;padding:26px 26px;background:var(--soft)}
.asset .ico{width:40px;height:40px;border:1.5px solid var(--red);color:var(--red);border-radius:3px;display:grid;place-items:center;font-family:"Spectral",serif;font-size:18px;font-weight:600;margin-bottom:15px}
.asset h4{font-size:18px;margin-bottom:9px}
.asset p{font-size:14px;color:var(--sub)}
@media(max-width:640px){.assets{grid-template-columns:1fr}}
.tiers{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:14px}
.tier{border:1px solid var(--line);border-radius:5px;padding:24px 22px;background:#fff}
.tier .t{font-family:"Noto Serif SC",serif;font-size:16px;font-weight:700;color:var(--red);margin-bottom:5px}
.tier .e{font-family:"Spectral",serif;font-style:italic;font-size:12.5px;color:var(--gold);margin-bottom:12px}
.tier p{font-size:13px;color:var(--sub)}
@media(max-width:760px){.tiers{grid-template-columns:1fr}}

.notebar{background:var(--soft);border:1px dashed var(--line);border-radius:5px;padding:16px 22px;font-size:13.5px;color:var(--sub);margin-top:26px}
.notebar b{color:var(--red);font-family:"Noto Serif SC",serif}

/* register */
.reg-split{display:grid;grid-template-columns:1.2fr 1fr;gap:26px;align-items:start}
.panel{border:1px solid var(--line);border-radius:6px;padding:34px 32px;background:#fff}
.panel.ent{background:var(--red);border-color:var(--red);color:#fff}
.panel .ptag{display:inline-flex;align-items:center;gap:9px;font-size:12px;letter-spacing:.16em;font-weight:500;margin-bottom:12px;color:var(--red)}
.panel.ent .ptag{color:#f1c97a}
.panel .ptag .sq{width:8px;height:8px;background:currentColor}
.panel h3{font-size:23px;margin-bottom:7px}
.panel.ent h3{color:#fff}
.panel .desc{font-size:14px;color:var(--sub);margin-bottom:22px}
.panel.ent .desc{color:#f3d9d9}
form{display:grid;gap:15px}
.field{display:flex;flex-direction:column;gap:6px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:15px}
label{font-size:12.5px;color:var(--sub);font-weight:500}
label .req{color:var(--red)}
.panel.ent label{color:#f3d9d9}
input,select,textarea{font-family:inherit;font-size:14px;color:var(--ink);padding:11px 13px;border:1px solid var(--line);border-radius:3px;background:#fff;width:100%;transition:border-color .2s,box-shadow .2s}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--red);box-shadow:0 0 0 3px rgba(148,7,10,.08)}
textarea{resize:vertical;min-height:76px}
.panel.ent input,.panel.ent select,.panel.ent textarea{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.3);color:#fff}
.panel.ent input::placeholder,.panel.ent textarea::placeholder{color:#eebcbc}
.panel.ent input:focus,.panel.ent select:focus,.panel.ent textarea:focus{background:rgba(255,255,255,.2);border-color:#f1c97a;box-shadow:0 0 0 3px rgba(241,201,122,.2)}
.chips{display:flex;gap:10px;flex-wrap:wrap}
.chip{position:relative}
.chip input{position:absolute;inset:0;opacity:0;cursor:pointer}
.chip span{display:block;padding:9px 15px;border:1px solid var(--line);border-radius:3px;font-size:13.5px;cursor:pointer;transition:all .18s;background:#fff}
.chip input:checked+span{background:var(--red);color:#fff;border-color:var(--red)}
.checkline{display:flex;align-items:center;gap:9px;font-size:13px;color:var(--sub)}
.checkline input{width:auto}
.submit{margin-top:6px;width:100%;justify-content:center;padding:14px;background:var(--red);border-color:var(--red);color:#fff}
.submit:hover{background:var(--red-d)}
.panel.ent .ent-pts{list-style:none;display:grid;gap:11px;margin-bottom:22px}
.panel.ent .ent-pts li{display:flex;gap:11px;font-size:14px;color:#f3d9d9;align-items:flex-start}
.panel.ent .ent-pts li::before{content:"";width:7px;height:7px;background:#f1c97a;margin-top:8px;flex:none}
.panel.ent .submit{background:#fff;color:var(--red);border-color:#fff}
.panel.ent .submit:hover{background:#f1c97a;border-color:#f1c97a}
.panel.ent .contact{margin-top:22px;padding-top:18px;border-top:1px solid rgba(255,255,255,.25);font-size:13px;color:#f3d9d9}
.panel.ent .contact b{color:#fff;font-family:"Noto Serif SC",serif}
@media(max-width:820px){.reg-split{grid-template-columns:1fr}.row2{grid-template-columns:1fr}}

/* footer */
footer{background:#231d19;color:#bdb4aa;padding:48px 0 30px;margin-top:24px}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:36px;padding-bottom:30px;border-bottom:1px solid rgba(255,255,255,.12)}
.foot-brand{display:flex;gap:13px}
.foot-brand .emblem{width:48px;height:48px}
.foot-brand b{font-family:"Noto Serif SC",serif;color:#fff;font-size:16px;display:block}
.foot-brand p{font-size:12.5px;color:#9a9087;margin-top:7px;max-width:34ch}
.foot-col h5{font-size:12px;letter-spacing:.14em;color:#8c8278;font-weight:500;margin-bottom:14px}
.foot-col a,.foot-col p{display:block;font-size:13px;color:#bdb4aa;margin-bottom:9px;cursor:pointer;transition:color .2s}
.foot-col a:hover{color:#fff}
.foot-b{padding-top:20px;display:flex;justify-content:space-between;font-size:12px;color:#7a7066;flex-wrap:wrap;gap:8px}
@media(max-width:760px){.foot-grid{grid-template-columns:1fr;gap:24px}}

.toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%) translateY(18px);background:var(--ink);color:#fff;padding:13px 26px;border-radius:4px;font-size:14px;opacity:0;pointer-events:none;transition:all .35s;z-index:100;box-shadow:0 18px 40px -18px rgba(0,0,0,.6);border-left:3px solid var(--gold)}
.toast.show{opacity:1;transform:translateX(-50%)}
@keyframes fcElec{from{stroke-dashoffset:0}to{stroke-dashoffset:-9}}@keyframes fcPulseD{0%,100%{filter:drop-shadow(0 0 2px rgba(148,7,10,.2))}50%{filter:drop-shadow(0 0 7px rgba(148,7,10,.45))}}@keyframes fcBlink{0%,49%{opacity:1}50%,100%{opacity:0}}.fc-wrap{margin:24px 0 0;padding:16px 20px;background:transparent;border-radius:8px}.fc-svg{width:100%;height:auto;display:block}.fce{stroke:#2a5c8a;stroke-width:1.5;stroke-dasharray:5 4;fill:none;filter:drop-shadow(0 0 1.5px rgba(42,92,138,.3));animation:fcElec .5s linear infinite}.fcnt,.fcne{animation:fcPulseD 2.2s ease-in-out infinite}.fcblink{animation:fcBlink 1s step-end infinite}.stream-split{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap}.stream-lo,.stream-hi{font-size:12px;font-weight:600;padding:5px 12px;border-radius:3px;letter-spacing:.04em}.stream-lo{background:#eef5ff;color:#2a6cc4;border:1px solid #b8d0f0}..news-list{display:flex;flex-direction:column;gap:20px;margin-top:24px}.news-item{padding:20px 24px;border:1px solid rgba(0,0,0,.09);border-radius:6px;display:flex;gap:20px;align-items:flex-start;background:#fafafa;transition:box-shadow .2s}.news-item:hover{box-shadow:0 2px 12px rgba(0,0,0,.08)}.news-date{min-width:84px;color:#999;font-size:12px;font-family:monospace;padding-top:2px;flex-shrink:0}.news-tag{display:inline-block;font-size:11px;font-weight:700;padding:2px 8px;border-radius:2px;letter-spacing:.04em;margin-bottom:6px}.news-tag.tag-notice{background:#fff0f0;color:#94070a;border:1px solid #f0c0c0}.news-tag.tag-update{background:#f0f5ff;color:#2a5c8a;border:1px solid #c0d4f0}.news-tag.tag-preview{background:#f0f8f0;color:#2a7a2a;border:1px solid #b8e0b8}.news-title{font-size:15px;font-weight:600;color:#111;margin-bottom:6px;line-height:1.5}.news-excerpt{font-size:13px;color:#666;line-height:1.75}.news-body{flex:1}.form-sec-title{font-size:11px;font-weight:700;letter-spacing:.1em;color:#94070a;text-transform:uppercase;margin:24px 0 10px;padding-bottom:6px;border-bottom:1px solid #f0e8e8}.row3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px}.form-note{font-size:12px;color:#888;margin:16px 0 12px;line-height:1.6;border-left:3px solid #e8e0d8;padding-left:10px}.sForm-wrap{width:100%}.sForm-wrap textarea{width:100%;box-sizing:border-box;padding:10px 12px;border:1px solid #e0dbd5;border-radius:4px;font-size:14px;font-family:inherit;resize:vertical;min-height:90px;color:#333}.sForm-wrap textarea:focus{outline:none;border-color:#94070a}
.reg-full{margin:0 auto}
.form-sec{margin-bottom:4px}
.form-sec-title{font-size:12px;font-weight:700;color:#94070a;letter-spacing:.1em;text-transform:uppercase;margin:22px 0 10px;padding-bottom:6px;border-bottom:1.5px solid #f5e8e8;display:flex;align-items:center;gap:8px}
.form-sec-title .hint{font-weight:400;color:#aaa;font-size:11px;letter-spacing:0;text-transform:none}
.chip-group{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:4px}
.chip-tag{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border:1px solid #ddd;border-radius:20px;cursor:pointer;font-size:13px;color:#555;transition:all .15s;user-select:none}
.chip-tag input{display:none}
.chip-tag:has(input:checked){background:#fff0f0;border-color:#94070a;color:#94070a;font-weight:600}
.row3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px;margin-bottom:14px}
@media(max-width:640px){.row3{grid-template-columns:1fr}}
.member-card,.advisor-card{display:grid;gap:12px;padding:14px 16px;background:#faf9f8;border:1px solid #ede9e4;border-radius:6px;margin-bottom:10px;position:relative}
.member-card{grid-template-columns:1fr 1fr 1fr 1fr}
.advisor-card{grid-template-columns:1fr 1fr 1fr 1fr}
@media(max-width:700px){.member-card,.advisor-card{grid-template-columns:1fr 1fr}}@media(max-width:480px){.member-card,.advisor-card{grid-template-columns:1fr}}
.card-remove{position:absolute;top:10px;right:12px;background:none;border:none;color:#ccc;font-size:20px;cursor:pointer;line-height:1;padding:0}
.card-remove:hover{color:#94070a}
.btn-add{background:none;border:1.5px dashed #ccc;color:#888;font-size:13px;padding:8px 20px;border-radius:4px;cursor:pointer;transition:all .15s;display:block;width:100%;text-align:center;margin-top:4px;box-sizing:border-box}
.btn-add:hover{border-color:#94070a;color:#94070a}

.reg-full{margin:0 auto}
.form-sec{margin-bottom:4px}
.form-sec-title{font-size:12px;font-weight:700;color:#94070a;letter-spacing:.1em;text-transform:uppercase;margin:22px 0 10px;padding-bottom:6px;border-bottom:1.5px solid #f5e8e8;display:flex;align-items:center;gap:8px}
.form-sec-title .hint{font-weight:400;color:#aaa;font-size:11px;letter-spacing:0;text-transform:none}
.chip-group{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:4px}
.chip-tag{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border:1px solid #ddd;border-radius:20px;cursor:pointer;font-size:13px;color:#555;transition:all .15s;user-select:none}
.chip-tag input{display:none}
.chip-tag:has(input:checked){background:#fff0f0;border-color:#94070a;color:#94070a;font-weight:600}
.row3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px;margin-bottom:14px}
@media(max-width:640px){.row3{grid-template-columns:1fr}}
.member-card,.advisor-card{display:grid;gap:12px;padding:14px 16px;background:#faf9f8;border:1px solid #ede9e4;border-radius:6px;margin-bottom:10px;position:relative}
.member-card{grid-template-columns:1fr 1fr 1fr}
.advisor-card{grid-template-columns:1fr 1fr 1fr}
@media(max-width:640px){.member-card,.advisor-card{grid-template-columns:1fr}}
.card-remove{position:absolute;top:10px;right:12px;background:none;border:none;color:#ccc;font-size:20px;cursor:pointer;line-height:1;padding:0}
.card-remove:hover{color:#94070a}
.btn-add{background:none;border:1.5px dashed #ccc;color:#888;font-size:13px;padding:8px 20px;border-radius:4px;cursor:pointer;transition:all .15s;display:block;width:100%;text-align:center;margin-top:4px;box-sizing:border-box}
.btn-add:hover{border-color:#94070a;color:#94070a}
.event-banner{background:#94070a;color:#fff;text-align:center;padding:7px 16px;font-size:13px;letter-spacing:.08em;display:flex;align-items:center;justify-content:center;gap:16px}.event-banner .eb-zh{font-weight:700;font-size:14px;letter-spacing:.1em}.event-banner .eb-en{opacity:.8;font-size:12px}body[data-lang="en"] .eb-zh{display:none}body[data-lang="zh"] .eb-en{display:none}.comp-title{display:flex;flex-direction:row;align-items:baseline;padding-left:16px;border-left:3px solid #94070a;gap:14px}.comp-name-zh{font-family:"Noto Serif SC",serif;font-size:26px;font-weight:900;color:#1a0505;letter-spacing:.18em;line-height:1.2}.comp-name-en{font-family:"EB Garamond","Georgia",serif;font-size:17px;font-weight:500;font-style:italic;color:#94070a;letter-spacing:.06em;opacity:.9}
/* ---- 语言切换：整页 section ---- */
body[data-lang="zh"] .page[data-lang="en"]{display:none!important}
body[data-lang="en"] .page[data-lang="zh"]{display:none!important}
/* ---- 语言切换：nav / topbar 内的 data-zh / data-en 片段 ---- */
body[data-lang="zh"] [data-en]{display:none!important}
body[data-lang="en"] [data-zh]{display:none!important}

/* ============ AUTH MODAL ============ */
.auth-bg{position:fixed;inset:0;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;z-index:1000;padding:16px}
.auth-box{background:#fff;border-radius:6px;width:100%;max-width:420px;padding:32px;position:relative;box-shadow:0 20px 60px rgba(0,0,0,.25)}
.auth-close{position:absolute;top:14px;right:16px;background:none;border:none;font-size:18px;color:#999;cursor:pointer;line-height:1}
.auth-close:hover{color:var(--ink)}
.auth-tabs{display:flex;gap:0;margin-bottom:24px;border-bottom:2px solid var(--line)}
.auth-tab{background:none;border:none;font-size:16px;font-weight:600;padding:8px 20px 10px;cursor:pointer;color:var(--sub);border-bottom:2px solid transparent;margin-bottom:-2px;font-family:inherit;transition:color .2s}
.auth-tab.on{color:var(--red);border-bottom-color:var(--red)}
.auth-form{display:flex;flex-direction:column;gap:14px}
.auth-field{display:flex;flex-direction:column;gap:5px}
.auth-field label{font-size:13.5px;color:var(--sub);font-weight:500}
.auth-field input{border:1.5px solid var(--line);border-radius:3px;padding:10px 12px;font-size:15px;font-family:inherit;outline:none;transition:border-color .2s}
.auth-field input:focus{border-color:var(--red)}
.auth-submit{background:var(--red);color:#fff;border:none;border-radius:3px;padding:12px;font-size:15px;font-weight:600;cursor:pointer;font-family:inherit;margin-top:4px;transition:background .2s}
.auth-submit:hover{background:var(--red-d)}
.auth-msg{font-size:13.5px;min-height:18px;color:var(--sub)}
.auth-msg.err{color:#c0392b}
.auth-switch{margin-top:16px;font-size:13.5px;color:var(--sub);text-align:center}
.auth-switch a{color:var(--red);cursor:pointer;font-weight:500}
.auth-switch a:hover{text-decoration:underline}
.pwd-rules{display:flex;gap:12px;margin-top:5px}
.pwd-rule{font-size:12.5px;color:#bbb;transition:color .2s}
.pwd-rule.ok{color:#27ae60}
.otp-hint{font-size:14px;color:var(--sub);margin-bottom:18px;line-height:1.6}