:root{--ink:#eeede7;--muted:#a9aba7;--red:#f06150;--line:#343735;--bg:#111513}body{background:var(--bg);color:var(--ink)}a{color:inherit}button,input{font:inherit}.nav{padding:30px 5vw;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{font-weight:800;font-size:30px;letter-spacing:-1px;text-decoration:none}.brand span{color:var(--red)}.brand small{font-size:10px;letter-spacing:2px;display:block;margin-top:2px;color:var(--muted)}.nav nav{display:flex;gap:32px;font-size:14px}.nav nav a{text-decoration:none}.nav-contact{font-size:14px;text-decoration:none;border:1px solid #5f655f;padding:12px 20px;border-radius:30px}.nav-contact span{margin-left:24px}.hero{padding:36px 5vw 0}.hero-top,.hero-bottom{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:12px}.eyebrow{font-size:11px;letter-spacing:2px;font-weight:600}.eyebrow i{display:inline-block;width:6px;height:6px;background:var(--red);border-radius:50%;margin-right:9px}.hero-grid{display:grid;grid-template-columns:1.25fr 1fr;gap:6vw;align-items:center;padding:55px 0 48px}.intro{font-size:14px;color:var(--muted);margin-bottom:22px}h1{font-size:clamp(36px,4.3vw,70px);letter-spacing:-2px;font-weight:600;line-height:1.32;margin:0}h1 span{display:block;color:var(--red)}.hero-copy{max-width:470px;font-size:15px;line-height:1.9;color:#b5b8b1;margin-top:26px}.hero-actions{display:flex;gap:30px;align-items:center;margin-top:35px}.button{display:inline-flex;gap:35px;padding:15px 22px;text-decoration:none;border-radius:4px;font-size:14px;font-weight:600}.button.red{background:var(--red);color:#101412}.text-link{font-size:14px;text-underline-offset:5px}.text-link span{margin-left:14px}.hero-art{min-height:440px;position:relative;overflow:hidden;border:1px solid #434a43}.hero-art img{width:100%;height:100%;position:absolute;object-fit:cover;filter:grayscale(1) brightness(.62)}.hero-art:after{content:'';position:absolute;inset:0;background:linear-gradient(0deg,#101613c9,transparent)}.art-caption{position:absolute;z-index:1;bottom:40px;left:30px;display:flex;flex-direction:column;gap:20px}.art-caption span{font:italic 44px/1.1 Georgia,serif;letter-spacing:-1px}.art-caption small{font-size:12px;color:#cdd1c8}.art-index{position:absolute;top:22px;left:24px;z-index:1;font-size:10px;letter-spacing:2px}.hero-bottom{border-top:1px solid var(--line);padding:18px 0 25px}.hero-bottom p{color:var(--ink);font-size:13px}.hero-bottom p span{color:var(--muted);margin-left:22px;font-size:12px}.hero-bottom a{text-decoration:none;font-size:12px}.hero-bottom a span{margin-left:14px}.approach{padding:82px 10vw 90px;background:#eae8e0;color:#17211a}.approach .eyebrow{color:#5a695d}.approach h2{font-size:clamp(29px,3.4vw,48px);font-weight:500;line-height:1.5;letter-spacing:-1px}.approach h2 span{color:#697c56}.approach-grid{display:grid;grid-template-columns:1fr 1fr;gap:10vw;margin-top:35px}.approach-grid p{font-size:15px;line-height:2;color:#556258;margin:0}.approach-grid div{display:grid;grid-template-columns:1fr 1fr;gap:12px;font-size:13px}.approach-grid span{padding:14px 0;border-top:1px solid #b9c0b2}.section{padding:85px 5vw}.section-head{display:flex;justify-content:space-between;gap:28px;align-items:end;margin-bottom:36px}.section-head .eyebrow{color:var(--red)}h2{margin:18px 0;font-size:clamp(27px,3vw,44px);letter-spacing:-1px;font-weight:500}.section-head>p{font-size:14px;color:var(--muted);line-height:1.9}.service-grid{display:grid;grid-template-columns:repeat(3,1fr);border-left:1px solid var(--line);border-top:1px solid var(--line)}.service-card{padding:28px 28px 32px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);transition:background .25s;position:relative}.service-card:hover{background:#1a211c}.service-no{color:#727b71;font:26px Georgia,serif}.service-card h3{font-size:21px;font-weight:500;margin:28px 0 12px}.service-card p{font-size:14px;line-height:1.9;color:var(--muted);min-height:52px}.service-card a{display:inline-block;margin-top:24px;color:var(--red);font-size:12px;text-decoration:none}.chain{display:flex;justify-content:space-between;gap:12px;padding:32px 0 0;align-items:center;color:var(--muted);font-size:13px}.chain b{font-weight:400;color:#697269}.research{background:#1b211d}.research-tools{display:flex;justify-content:space-between;gap:20px;align-items:center;margin:30px 0}.categories{display:flex;flex-wrap:wrap;gap:8px}.categories button{border:1px solid #475147;color:var(--muted);background:none;padding:9px 13px;border-radius:25px;font-size:12px;cursor:pointer}.categories button.active{background:#edeee6;color:#17201a;border-color:#edeee6}.search{font-size:0}.search input{background:none;border:0;border-bottom:1px solid #647160;color:var(--ink);padding:12px 2px;font-size:13px;width:220px;border-radius:0}.research-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.research-card{padding:25px;background:#252c26;border:1px solid #364038;display:flex;flex-direction:column;min-height:215px}.research-card .category{font-size:11px;color:#b2c7a7}.research-card h3{font-size:21px;font-weight:500;line-height:1.5;margin:18px 0 12px}.research-card p{font-size:13px;line-height:1.8;color:#a6b19f;flex:1}.research-card a,.research-card button{font-size:12px;border:0;padding:10px 0 0;color:#dfebd5;text-decoration:none;align-self:start;background:none;cursor:pointer}.research-card a span{margin-left:16px}.about{display:grid;grid-template-columns:1fr 1fr;gap:10vw;border-bottom:1px solid var(--line)}.about .eyebrow{color:var(--red)}.about h2{font-size:40px;line-height:1.5}.about p{font-size:15px;line-height:2;color:var(--muted)}.about .about-lead{color:var(--ink);font-size:23px;line-height:1.7}.about-label{display:inline-block;border:1px solid #485143;padding:8px 12px;font-size:11px;color:var(--muted);margin-top:15px}.contact{padding:85px 5vw;background:#ee5c4d;color:#141813}.contact .eyebrow{color:#52281e}.contact h2{font-size:clamp(46px,6vw,85px);line-height:1.2;letter-spacing:-3px}.contact h2 span{font-family:Georgia,serif;font-style:italic}.contact>a{display:inline-flex;font-size:clamp(19px,2.5vw,36px);gap:6vw;text-decoration:none;border-bottom:1px solid #79362c;padding:22px 0}.contact>p:last-child{font-size:12px;margin-top:30px;color:#61332a}footer{padding:34px 5vw;display:flex;align-items:center;justify-content:space-between;gap:25px}footer p{font-size:12px;color:var(--muted)}footer>div{display:flex;gap:20px;font-size:11px;color:var(--muted)}footer a{text-decoration:none}dialog{border:1px solid #596354;background:#edf0e8;color:#202b20;border-radius:8px;width:min(840px,90vw);padding:30px}dialog::backdrop{background:#0009;backdrop-filter:blur(4px)}.article-header{display:flex;justify-content:space-between;align-items:center;font-size:11px;letter-spacing:2px;border-bottom:1px solid #b0bcac;padding-bottom:18px}.article-header button{border:0;background:none;cursor:pointer;font-size:13px}#article-body{padding:25px 0;max-height:70vh;overflow:auto}#article-body h1{font-size:32px;letter-spacing:0}#article-body .article-text{white-space:pre-wrap;line-height:2;font-size:16px;margin:30px 0}#article-body a{word-break:break-all;font-size:13px}.empty-research{grid-column:1/-1;padding:30px;color:var(--muted)}
@media(max-width:900px){.hero-grid{gap:35px}.hero-art{min-height:380px}.art-caption span{font-size:34px}.service-grid,.research-grid{grid-template-columns:repeat(2,1fr)}.section-head{align-items:start}.about{gap:6vw}.about h2{font-size:32px}.nav nav{gap:15px}.nav-contact{padding:10px 12px}footer{flex-wrap:wrap}}
@media(max-width:600px){.nav{padding:20px 6vw;flex-wrap:wrap;gap:20px}.brand{font-size:26px}.nav nav{order:3;flex-basis:100%;justify-content:space-between;font-size:12px}.nav-contact{font-size:12px}.hero{padding:24px 6vw 0}.hero-top{font-size:10px}.eyebrow{font-size:9px;letter-spacing:1.5px}.hero-grid{grid-template-columns:1fr;padding-top:30px}h1{font-size:36px;letter-spacing:-1px}.hero-copy{font-size:14px}.hero-actions{gap:25px}.hero-art{min-height:360px}.hero-bottom{align-items:start;gap:20px}.hero-bottom p{margin:0;line-height:1.9}.hero-bottom p span{display:block;margin:0}.hero-bottom a{margin-top:5px;white-space:nowrap}.approach{padding:50px 6vw}.approach-grid{grid-template-columns:1fr;gap:25px}.section{padding:55px 6vw}.section-head{display:block;margin-bottom:25px}.section-head>p{font-size:13px}.service-grid,.research-grid{grid-template-columns:1fr}.service-card{padding:24px}.service-card h3{margin-top:18px}.service-card p{min-height:0}.chain{flex-wrap:wrap;justify-content:start;font-size:11px;gap:12px}.chain span{white-space:nowrap}.research-tools{flex-direction:column;align-items:stretch}.categories button{font-size:11px}.search input{width:100%;font-size:14px}.research-card{min-height:190px}.about{grid-template-columns:1fr;gap:12px}.about .about-lead{font-size:21px}.contact{padding:55px 6vw}.contact h2{font-size:55px}.contact>a{font-size:20px;gap:35px}footer{padding:30px 6vw;gap:15px}footer>div{flex-wrap:wrap;font-size:11px;gap:12px}footer p{flex-basis:100%;margin:0}dialog{padding:20px;width:94vw}#article-body h1{font-size:26px}}
/* 幕后中台展示 2026-10-02 */
.backstage{padding:85px 5vw;background:#eae8e0;color:#17211a}
.backstage .bk-eyebrow{font-size:11px;letter-spacing:2px;font-weight:600;color:#5a695d}
.backstage h2{font-size:clamp(29px,3.4vw,48px);font-weight:500;line-height:1.4;letter-spacing:-1px;margin:18px 0 0}
.backstage h2 span{color:#b64133}
.bk-head{display:flex;justify-content:space-between;gap:6vw;align-items:end;margin-bottom:40px}
.bk-head>p{max-width:400px;font-size:14px;line-height:2;color:#556258;margin:0}
.bk-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.bk-grid figure{margin:0;border:1px solid #c4cabe;background:#fff;overflow:hidden}
.bk-grid video,.bk-grid img{display:block;width:100%;aspect-ratio:1280/762;object-fit:cover;background:#0f2a4a}
@keyframes bkZoom{from{transform:scale(1)}to{transform:scale(1.09)}}
.bk-grid figure>img{animation:bkZoom 24s ease-in-out infinite alternate;transform-origin:center}
.bk-grid figcaption{display:flex;justify-content:space-between;gap:16px;padding:15px 20px;font-size:13px;color:#556258;border-top:1px solid #e2e4da}
.bk-grid figcaption b{font-weight:600;color:#17211a}
.bk-foot{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-top:26px}
.bk-foot small{font-size:12px;color:#7a857b}
.bk-link{display:inline-flex;gap:14px;align-items:center;background:#17211a;color:#eeede7;text-decoration:none;font-size:14px;font-weight:600;padding:15px 22px;border-radius:4px}
.bk-link:hover{background:#b64133}
@media(max-width:900px){.bk-grid{grid-template-columns:1fr}.bk-head{display:block}.bk-head>p{margin-top:18px}}
@media(max-width:600px){.backstage{padding:55px 6vw}.bk-foot{flex-wrap:wrap}}

/* ── AI 视频装饰（2026-10-02 纸上山河/城市脉搏） ── */
.hero-art video{width:100%;height:100%;position:absolute;object-fit:cover;filter:grayscale(1) brightness(.62)}
.cityband{position:relative;overflow:hidden;background:#0e1210}
.cityband video{width:100%;display:block;max-height:74vh;object-fit:cover}
.cityband-cap{position:absolute;left:5vw;bottom:34px;z-index:1;color:#eeede7}
.cityband-cap b{display:block;font:italic 34px/1.1 Georgia,"Times New Roman",serif;letter-spacing:-1px}
.cityband-cap small{display:block;margin-top:8px;font-size:12px;letter-spacing:.08em;color:#cdd1c8}
@media(max-width:600px){.cityband-cap b{font-size:24px}}

/* ── City Pulse 2.0：黄昏全景图（2026-10-03 red 定制版） ── */
.cityband img.kb{width:100%;display:block;max-height:74vh;object-fit:cover;animation:citykb 18s ease-in-out infinite alternate}
@keyframes citykb{from{transform:scale(1)}to{transform:scale(1.07)}}
.cityband::after{content:"";position:absolute;left:0;right:0;bottom:0;height:45%;background:linear-gradient(to top,rgba(10,12,14,.55),transparent);pointer-events:none}
.cityband-cap{text-shadow:0 1px 8px rgba(0,0,0,.45)}

/* ==== 2026-10-04 视觉升级：about 三栏影像 + 动态连接网络 / contact 影像 ==== */
.about{grid-template-columns:280px 1fr 360px;gap:4vw;align-items:start}
.about .about-net{aspect-ratio:16/10;overflow:hidden;position:relative;align-self:center;background:linear-gradient(180deg,#1b2720,#11170f)}
.about .about-net canvas{display:block;width:100%;height:100%}
.about .about-net::after{content:"";position:absolute;inset:0;background:radial-gradient(120% 120% at 50% 50%,transparent 55%,rgba(23,33,26,.3));pointer-events:none}
.contact{display:grid;grid-template-columns:1fr 1fr;gap:5vw;align-items:center}
.contact-copy>a{display:inline-flex;font-size:clamp(19px,2.5vw,36px);gap:6vw;text-decoration:none;border-bottom:1px solid #79362c;padding:22px 0}
.contact-copy>p:last-child{font-size:12px;margin-top:30px;color:#61332a}
.contact-photo{margin:0;aspect-ratio:3/2;overflow:hidden;position:relative;box-shadow:0 30px 60px -18px rgba(20,24,19,.35)}
.contact-photo img{width:100%;height:100%;object-fit:cover;display:block;animation:kenburns 26s ease-in-out infinite alternate;will-change:transform}
@keyframes kenburns{from{transform:scale(1)}to{transform:scale(1.09)}}
@media(max-width:900px){.about{grid-template-columns:1fr 1fr}.about .about-net{grid-column:1/-1}}
@media(max-width:600px){.about{grid-template-columns:1fr}.contact{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){.contact-photo img{animation:none}}

/* 「更多研究」展开块（2026-10-10 首页研报目录扩容） */
.research-more{cursor:pointer;font:inherit;color:var(--ink);text-align:left;justify-content:center;gap:10px;border-style:dashed;transition:border-color .25s,background .25s}
.research-more:hover{border-color:var(--red);background:#2a2423}
.research-more h3{color:var(--red)}
.research-more p{color:var(--muted);font-size:.9rem;line-height:1.7}
.research-more .more-link{color:var(--red);font-size:.9rem;letter-spacing:.08em}

/* ICP registration: centered and matched to the existing footer typography. */
footer{flex-wrap:wrap;row-gap:16px}footer .icp-filing{display:block;flex:0 0 100%;order:10;text-align:center;font-size:11px;line-height:1.6;color:var(--muted)}footer .icp-filing a{display:inline-block;padding:4px 0;font:inherit;color:inherit;white-space:nowrap;text-decoration:none}footer .icp-filing a:hover{text-decoration:underline;text-underline-offset:3px}footer .icp-filing a:focus-visible{outline:2px solid currentColor;outline-offset:4px;border-radius:2px}

/* Public security registration, alongside ICP; wraps naturally on phones. */
footer .icp-filing{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:4px 20px}footer .icp-filing .mps-filing{display:inline-flex;align-items:center;gap:5px}footer .mps-filing img{display:block;width:16px;height:16px;flex:0 0 16px;object-fit:contain}