/* ============================================================
   无限回归 · 技术与研究（research.html）
   2026-10-24 · 内容沿用原页，本文件只负责排版、布局与配色。
   配色：深海军蓝 / 骨白 / 黄铜 —— 与站内白皮书页、纯黑页区分。
   ============================================================ */

:root{
  --bg:#0A1522;
  --bg-2:#0D1B2A;
  --ink:#E9E3D6;
  --ink-2:#A6B2C0;
  --ink-3:#6E7C8C;
  --accent:#C79A4B;
  --accent-2:#E0B77A;
  --line:rgba(233,227,214,.14);
  --line-soft:rgba(233,227,214,.075);
  --serif:'Noto Serif SC','Songti SC','STSong',serif;
  --sans:'Noto Sans SC','PingFang SC','Hiragino Sans GB',sans-serif;
  --mono:'IBM Plex Mono','SFMono-Regular',Menlo,monospace;
}

*{margin:0;padding:0;box-sizing:border-box}
html{background:var(--bg);-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body[data-page="research"]{
  background:var(--bg);color:var(--ink);
  font-family:var(--sans);font-weight:300;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
body[data-page="research"] img{display:block;max-width:100%}
body[data-page="research"] ::selection{background:rgba(199,154,75,.28)}
.wrap{width:min(1040px,calc(100% - 64px));margin:0 auto}
@media(max-width:640px){.wrap{width:calc(100% - 40px)}}

/* ---------- 页头 ---------- */
body[data-page="research"] .nav{padding:26px 0;border-bottom:1px solid var(--line-soft)}
body[data-page="research"] .navin{display:flex;justify-content:space-between;align-items:center;gap:20px}
body[data-page="research"] .brand{display:inline-flex;align-items:center;gap:10px;font-family:var(--serif);font-weight:700;font-size:16px;letter-spacing:.2em;color:var(--ink);text-decoration:none}
body[data-page="research"] .brand-mark{width:28px;height:auto;opacity:.92}
body[data-page="research"] .links a{font-family:var(--mono);font-size:11px;letter-spacing:.16em;color:var(--ink-2);text-decoration:none}
body[data-page="research"] .links a:hover{color:var(--accent-2)}

/* ---------- 首屏 ---------- */
body[data-page="research"] .head{padding:92px 0 64px}
body[data-page="research"] .head-split{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);gap:clamp(32px,5vw,64px);align-items:center}
body[data-page="research"] .lab{font-family:var(--mono);font-size:10.5px;letter-spacing:.28em;color:var(--accent);text-transform:uppercase}
body[data-page="research"] .head h1{margin-top:26px;font-family:var(--serif);font-weight:700;font-size:clamp(30px,3.9vw,50px);line-height:1.5;letter-spacing:.02em;text-wrap:balance}
body[data-page="research"] .head .lead br{display:none}
body[data-page="research"] .head .lead{margin-top:24px;max-width:620px;font-family:var(--serif);font-size:clamp(17px,1.75vw,21px);line-height:2;color:var(--ink);letter-spacing:.02em}
body[data-page="research"] .head .hint{margin-top:28px;font-family:var(--mono);font-size:10px;letter-spacing:.24em;color:var(--ink-3)}
body[data-page="research"] .head-visual{position:relative;aspect-ratio:16/9;overflow:hidden;border:1px solid var(--line-soft)}
body[data-page="research"] .head-visual img{width:100%;height:100%;object-fit:cover;object-position:50% 50%}
@media(max-width:960px){
  body[data-page="research"] .head-split{grid-template-columns:1fr;gap:28px}
  body[data-page="research"] .head-visual{height:auto}
  body[data-page="research"] .head{padding:60px 0 44px}
}

/* ---------- 章节导航 ---------- */
body[data-page="research"] .research-jump{width:min(1040px,calc(100% - 64px));margin:0 auto;padding:20px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
body[data-page="research"] .research-jump>span{display:block;margin-bottom:12px;font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:var(--accent);text-transform:uppercase}
body[data-page="research"] .research-jump ol{display:flex;flex-wrap:wrap;gap:6px 26px;list-style:none}
body[data-page="research"] .research-jump a{font-size:13px;color:var(--ink-2);text-decoration:none;line-height:1.9}
body[data-page="research"] .research-jump a:hover{color:var(--ink)}
@media(max-width:640px){
  body[data-page="research"] .research-jump{width:calc(100% - 40px)}
  body[data-page="research"] .research-jump ol{display:grid;grid-template-columns:1fr 1fr;gap:2px 16px}
  body[data-page="research"] .research-jump a{font-size:12.5px}
}

/* ---------- 正文章节 ---------- */
body[data-page="research"] .page{max-width:900px;margin:0 auto;padding:76px 0 64px;border-bottom:1px solid var(--line-soft);scroll-margin-top:28px;position:relative}
body[data-page="research"] .pno{font-family:var(--mono);font-size:10.5px;letter-spacing:.24em;color:var(--accent);text-transform:uppercase}
body[data-page="research"] .pgdots{display:none}
body[data-page="research"] .pt{margin-top:14px;font-family:var(--serif);font-weight:700;font-size:clamp(25px,3vw,36px);line-height:1.48;letter-spacing:.02em;text-wrap:balance}
body[data-page="research"] .ps{margin-top:14px;font-family:var(--serif);font-size:17px;line-height:1.95;color:var(--ink-2);letter-spacing:.02em;max-width:760px}
body[data-page="research"] .pb{margin-top:10px}
body[data-page="research"] .pb p{margin-top:20px;font-size:15.5px;line-height:2.1;color:var(--ink);letter-spacing:.01em;max-width:800px}
body[data-page="research"] .pb>p:first-child{font-size:17px;color:var(--ink)}
body[data-page="research"] .pb p:empty{display:none}
body[data-page="research"] .page:has(.research-fig) .pb>p:first-child{color:var(--ink)}

/* 条目列表 */
body[data-page="research"] .items{margin-top:30px;list-style:none;border-top:1px solid var(--line)}
body[data-page="research"] .items li{padding:18px 0;border-bottom:1px solid var(--line-soft);counter-increment:it}
body[data-page="research"] .items{counter-reset:it}
body[data-page="research"] .items li b{display:block;position:relative;padding-left:38px;font-size:15.5px;font-weight:600;color:var(--ink);letter-spacing:.02em;line-height:1.8}
body[data-page="research"] .items li b::before{content:counter(it,decimal-leading-zero);position:absolute;left:0;top:3px;font-family:var(--mono);font-size:9.5px;font-weight:400;letter-spacing:.12em;color:var(--accent)}
body[data-page="research"] .items li span{display:block;margin-top:6px;padding-left:38px;font-size:14px;line-height:1.95;color:var(--ink-2)}
@media(min-width:900px){
  body[data-page="research"] .items{display:grid;grid-template-columns:1fr 1fr;column-gap:44px}
  body[data-page="research"] .items li:nth-last-child(1):nth-child(odd){grid-column:1/-1}
}

/* 本页摘要 */
body[data-page="research"] .sum{margin-top:34px;padding:22px 24px;border-left:2px solid var(--accent);background:rgba(199,154,75,.055)}
body[data-page="research"] .sum span{font-family:var(--mono);font-size:9.5px;letter-spacing:.22em;color:var(--accent);text-transform:uppercase}
body[data-page="research"] .sum p{margin-top:10px;font-family:var(--serif);font-size:16.5px;line-height:1.95;color:var(--ink)}

/* ---------- 图版 / 概念图 ---------- */
body[data-page="research"] .research-fig{margin:40px 0 0;scroll-margin-top:24px;width:min(1120px,calc(100vw - 48px));position:relative;left:50%;margin-left:calc(-1 * min(560px, 50vw - 24px));margin-top:0}
body[data-page="research"] .research-fig figcaption{max-width:900px;margin:0 auto}
body[data-page="research"] .concept-art{width:min(1120px,calc(100vw - 48px));position:relative;left:50%;margin-left:calc(-1 * min(560px, 50vw - 24px));margin-top:0}
body[data-page="research"] .concept-art figcaption{max-width:900px;margin:0 auto}
body[data-page="research"] .research-plate{display:block;line-height:0;text-decoration:none}
body[data-page="research"] .research-plate img{width:100%;height:auto;aspect-ratio:16/9;object-fit:contain;background:transparent;border:0}
body[data-page="research"] .research-fig figcaption{padding-top:16px}
body[data-page="research"] .figure-heading{display:flex;align-items:baseline;gap:8px 14px;flex-wrap:wrap}
body[data-page="research"] .figure-number{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;color:var(--accent);white-space:nowrap}
body[data-page="research"] .figure-heading h3{flex:1;min-width:200px;margin:0;font-family:var(--serif);font-weight:600;font-size:17.5px;line-height:1.7;color:var(--ink);text-wrap:balance}
body[data-page="research"] .figure-open{font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;color:var(--ink-3);text-decoration:none;white-space:nowrap}
body[data-page="research"] .figure-open:hover{color:var(--accent-2)}
body[data-page="research"] .figure-details{margin-top:10px;border-top:1px solid var(--line-soft);padding-top:2px}
body[data-page="research"] .figure-details summary{display:inline-flex;align-items:center;gap:8px;min-height:40px;font-family:var(--mono);font-size:10px;letter-spacing:.12em;color:var(--ink-3);cursor:pointer;list-style:none;text-transform:uppercase}
body[data-page="research"] .figure-details summary::-webkit-details-marker{display:none}
body[data-page="research"] .figure-details summary::after{content:'+';color:var(--accent);font-size:12px}
body[data-page="research"] .figure-details[open] summary::after{content:'−'}
body[data-page="research"] .figure-details summary:hover{color:var(--ink-2)}
body[data-page="research"] .figure-description{margin:4px 0 0;font-size:13.5px;line-height:1.9;color:var(--ink-2)}
body[data-page="research"] .figure-key{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-top:16px;padding-top:14px;border-top:1px solid var(--line-soft)}
body[data-page="research"] .figure-key dt{font-size:12.5px;font-weight:500;color:var(--ink);margin-bottom:4px}
body[data-page="research"] .figure-key dd{font-size:12.5px;line-height:1.85;color:var(--ink-2);margin:0}
body[data-page="research"] .figure-status{margin-top:12px;font-size:11px;line-height:1.8;letter-spacing:.04em;color:var(--ink-3)}

body[data-page="research"] .concept-art{margin-top:30px;margin-bottom:8px}
body[data-page="research"] .concept-art a{display:block;line-height:0}
body[data-page="research"] .concept-art img{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;background:transparent;border:0}
body[data-page="research"] .concept-art figcaption{display:flex;align-items:baseline;gap:6px 14px;flex-wrap:wrap;padding-top:12px}
body[data-page="research"] .concept-art figcaption b{font-family:var(--mono);font-size:9.5px;font-weight:500;letter-spacing:.14em;color:var(--accent);white-space:nowrap;text-transform:uppercase}
body[data-page="research"] .concept-art figcaption span{flex:1 1 240px;font-size:13px;line-height:1.85;color:var(--ink-2)}
body[data-page="research"] .concept-art figcaption small{flex:1 1 100%;font-size:10.5px;letter-spacing:.03em;color:var(--ink-3)}

@media(max-width:640px){
  body[data-page="research"] .page{padding:52px 0 44px}
  body[data-page="research"] .research-fig{margin-top:30px}
  body[data-page="research"] .figure-key{grid-template-columns:1fr;gap:12px}
  body[data-page="research"] .figure-key>div{display:grid;grid-template-columns:78px minmax(0,1fr);gap:10px}
  body[data-page="research"] .figure-key dt{margin:0}
  body[data-page="research"] .figure-heading h3{font-size:16px;min-width:0;flex-basis:100%}
  body[data-page="research"] .figure-open{margin-left:0}
}

/* ---------- 五级推进 ---------- */
body[data-page="research"] .stairs{margin:56px auto 0;width:min(1040px,calc(100% - 64px));border-top:1px solid var(--line)}
body[data-page="research"] .stairs .st{display:flex;align-items:baseline;gap:22px;padding:16px 0;border-bottom:1px solid var(--line-soft)}
body[data-page="research"] .stairs .lv{flex:none;width:40px;font-family:var(--mono);font-size:10px;letter-spacing:.16em;color:var(--accent)}
body[data-page="research"] .stairs b{flex:none;width:120px;font-size:14.5px;font-weight:600;color:var(--ink);letter-spacing:.04em}
body[data-page="research"] .stairs p{font-size:13.5px;line-height:1.9;color:var(--ink-2)}
@media(max-width:640px){
  body[data-page="research"] .stairs{width:calc(100% - 40px);margin-top:40px}
  body[data-page="research"] .stairs .st{flex-wrap:wrap;gap:4px 16px;padding:14px 0}
  body[data-page="research"] .stairs b{width:auto}
  body[data-page="research"] .stairs p{flex-basis:100%}
}

/* ---------- 结语 ---------- */
body[data-page="research"] .fin{padding:88px 0 96px;text-align:center}
body[data-page="research"] .fin .big{font-family:var(--serif);font-weight:700;font-size:clamp(24px,3.1vw,40px);line-height:1.75;letter-spacing:.02em;text-wrap:balance}
body[data-page="research"] .fin .list{margin-top:30px;font-size:14.5px;line-height:2.2;color:var(--ink-2)}
body[data-page="research"] .fin .end{margin-top:44px;font-family:var(--serif);font-size:clamp(17px,2vw,22px);line-height:2;color:var(--ink)}
body[data-page="research"] .fin .cta{margin-top:40px}
body[data-page="research"] .fin .cta a{display:inline-block;padding:14px 40px;background:var(--accent);color:#0A1522;font-family:var(--mono);font-size:10.5px;letter-spacing:.22em;text-transform:uppercase;text-decoration:none;transition:background .3s}
body[data-page="research"] .fin .cta a:hover{background:var(--accent-2)}
@media(max-width:640px){
  body[data-page="research"] .fin{padding:60px 0 68px}
  body[data-page="research"] .fin .list br{display:none}
}

/* ---------- 页脚（深色收尾） ---------- */
body[data-page="research"] footer.rwm-footer{
  --rwm-f-bg:#07101A;--rwm-f-line:rgba(233,227,214,.1);--rwm-f-line-soft:rgba(233,227,214,.05);
  --rwm-f-ink:#E9E3D6;--rwm-f-ink-2:#A6B2C0;--rwm-f-ink-3:#6E7C8C;--rwm-f-accent:#C79A4B;
  background:#07101A;border-top:1px solid #152536;
}

/* ---------- 进入动画 ---------- */
body[data-page="research"] .sr{opacity:0;transform:translateY(14px);transition:opacity .8s cubic-bezier(.22,.61,.36,1),transform .8s cubic-bezier(.22,.61,.36,1)}
body[data-page="research"] .sr.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  body[data-page="research"] .sr{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}
@media print{
  body[data-page="research"]{background:#07101A}
  body[data-page="research"] .sr{opacity:1!important;transform:none!important}
  body[data-page="research"] .nav,body[data-page="research"] .research-jump,body[data-page="research"] .fin .cta{display:none}
}