:root{--p:#715647;--d:#553f34;--ink:#2b2320;--bg:#ffffff;--line:#e7e0da}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:'Segoe UI',Roboto,'Helvetica Neue',Arial,'Noto Sans',sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
a{color:var(--d);text-decoration:none}
a:hover{text-decoration:underline}
.topbar{background:var(--p);color:#fff;padding:14px 22px;display:flex;align-items:center;gap:14px;position:sticky;top:0;z-index:50;box-shadow:0 2px 10px rgba(0,0,0,.12)}
.topbar .home{color:#fff;font-weight:600;font-size:15px;display:flex;align-items:center;gap:8px}
.topbar .home:hover{text-decoration:none;opacity:.9}
.wrap{max-width:1000px;margin:0 auto;padding:0 22px}
/* hero */
.hero{background:linear-gradient(135deg,var(--p),var(--d));color:#fff;padding:64px 22px 56px;text-align:center}
.hero .badge{display:inline-block;border:1px solid rgba(255,255,255,.5);border-radius:40px;padding:5px 16px;font-size:13px;letter-spacing:.5px;margin-bottom:20px}
.hero h1{font-size:30px;margin:0 0 14px;font-weight:700;max-width:820px;margin-inline:auto;line-height:1.3}
.hero .sub{font-size:19px;opacity:.95;font-style:italic;margin:0 0 18px}
.hero .meta{font-size:15px;opacity:.9}
.hero .meta b{font-weight:600}
/* toc */
section.toc{padding:46px 0 70px}
.toc h2{font-size:22px;color:var(--d);border-bottom:3px solid var(--p);display:inline-block;padding-bottom:6px;margin:0 0 6px}
.toc .count{color:#6b7d84;font-size:14px;margin:0 0 26px}
.card{display:flex;gap:16px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px 18px;margin-bottom:12px;transition:.15s;align-items:flex-start}
.card:hover{border-color:var(--p);box-shadow:0 4px 16px rgba(113,86,71,.18);transform:translateY(-1px)}
.card .num{flex:0 0 44px;height:44px;border-radius:8px;background:var(--p);color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;font-size:16px}
.card .body{flex:1}
.card .ttl{font-weight:600;font-size:16px;color:var(--ink);margin:0 0 4px}
.card:hover .ttl{color:var(--d)}
.card .au{font-size:13.5px;color:#5a6c73;margin:0 0 6px}
.card .tags{display:flex;gap:6px;flex-wrap:wrap}
.tag{font-size:11.5px;padding:2px 9px;border-radius:20px;background:#f2ece8;color:var(--d);border:1px solid #e3d8d0}
.tag.kw{background:#f6efe6;color:#7a5a2a;border-color:#e6d8c2}
/* talk page */
.talkhead{background:linear-gradient(135deg,var(--p),var(--d));color:#fff;padding:40px 22px}
.talkhead .k{font-size:12.5px;letter-spacing:1px;text-transform:uppercase;opacity:.85;margin-bottom:10px}
.talkhead h1{font-size:25px;margin:0 0 12px;max-width:880px;line-height:1.32}
.talkhead .au{font-size:15px;opacity:.96}
.talkhead .aff{font-size:14px;opacity:.85;margin-top:3px}
.block{background:#fff;border:1px solid var(--line);border-radius:12px;margin:22px 0;overflow:hidden}
.block h3{margin:0;padding:14px 20px;background:#f4efec;border-bottom:1px solid var(--line);font-size:15px;color:var(--d);display:flex;align-items:center;gap:9px}
.block .inner{padding:18px 20px}
.videobox .ph{background:#f6f3f0;border:2px dashed #cdbcb0;border-radius:10px;padding:34px 20px;text-align:center;color:#5a6c73}
.videobox .ph .ic{font-size:34px}
.videobox .ph code{background:#e7ddd6;padding:2px 7px;border-radius:5px;font-size:13px;color:#553f34}
.ratio{position:relative;padding-top:56.25%;background:#000;border-radius:10px;overflow:hidden}
.ratio iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.pdfbar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:14px}
.btn{display:inline-flex;align-items:center;gap:7px;background:var(--p);color:#fff;padding:9px 16px;border-radius:8px;font-size:14px;font-weight:600}
.btn:hover{background:var(--d);text-decoration:none}
.btn.ghost{background:#fff;color:var(--d);border:1px solid var(--p)}
.pdfframe{width:100%;height:760px;border:1px solid var(--line);border-radius:8px}
.slides{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px}
.slides img{width:100%;border:1px solid var(--line);border-radius:8px;cursor:pointer;transition:.15s;background:#fff}
.slides img:hover{border-color:var(--p);box-shadow:0 3px 12px rgba(0,0,0,.12)}
.note{background:#f7f2ec;border:1px solid #e2d5c6;border-radius:8px;padding:12px 16px;font-size:14px;color:#6b5340;margin:14px 0}
.nav{display:flex;justify-content:space-between;gap:12px;margin:30px 0 10px}
.nav a{flex:1;background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px 16px;font-size:14px}
.nav a:hover{border-color:var(--p);text-decoration:none}
.nav .lbl{display:block;font-size:12px;color:#8a9aa0}
.nav .r{text-align:right}
footer{background:var(--ink);color:#c7d3d8;text-align:center;padding:28px 22px;font-size:13.5px;margin-top:40px}
/* lightbox */
#lb{display:none;position:fixed;inset:0;background:rgba(0,0,0,.9);z-index:100;align-items:center;justify-content:center;flex-direction:column}
#lb.on{display:flex}
#lb img{max-width:92%;max-height:82%;border-radius:6px}
#lb .x{position:absolute;top:18px;right:26px;color:#fff;font-size:34px;cursor:pointer;line-height:1}
#lb .arw{position:absolute;top:50%;transform:translateY(-50%);color:#fff;font-size:46px;cursor:pointer;user-select:none;padding:0 22px}
#lb .prev{left:6px}#lb .next{right:6px}
#lb .cap{color:#cfe;margin-top:14px;font-size:14px}
.abstract{margin:0;font-size:15px;color:#3a3128;text-align:justify;white-space:pre-line}
.kwrow{display:flex;flex-wrap:wrap;gap:7px;margin-top:16px;align-items:center}
.kwlabel{font-size:11.5px;text-transform:uppercase;letter-spacing:.6px;color:#9a8b80;margin-right:3px}
.kwchip{font-size:12.5px;background:#f2ece8;color:var(--d);border:1px solid #e3d8d0;border-radius:20px;padding:3px 11px}
@media(max-width:640px){.hero h1{font-size:23px}.talkhead h1{font-size:20px}.pdfframe{height:520px}}