/* 龙虎斗官网 - ESG Research Terminal + Circular Material Intelligence Lab + AI Recycling Operations Console */
:root{
  --bg:#f4f5f7;--bg-2:#ffffff;--bg-soft:#eceff3;
  --graphite:#1c2129;--graphite-2:#242b35;--slate:#2b3644;
  --text:#1e242c;--text-2:#4b5563;--text-3:#6b7280;--line:#d9dee5;--line-dark:#3a4656;
  --esg:#0f6e6e;--esg-soft:#d7ecec;
  --circ:#1e8f8a;--circ-soft:#d9f1ee;
  --mat:#5b5fc7;--mat-soft:#e3e4f7;
  --plastic:#2b8fbf;--plastic-soft:#dcedf6;
  --metal:#8d97a3;--metal-soft:#e6e9ed;
  --battery:#e08a2e;--battery-soft:#fbe9d3;
  --risk:#d9532b;--risk-soft:#f9dfd6;
  --radius:10px;--shadow:0 6px 24px rgba(20,28,40,.08);
  --maxw:1180px;--font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC",Arial,sans-serif;
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.8;font-size:16px;overflow-x:hidden}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--esg);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.35;margin:0 0 .6em;font-weight:700;color:var(--text)}
h1{font-size:clamp(1.55rem,3.2vw,2.35rem)}
h2{font-size:clamp(1.35rem,2.4vw,1.85rem)}
h3{font-size:clamp(1.12rem,1.8vw,1.35rem)}
h4{font-size:1.05rem}
p{margin:0 0 1em}
ul,ol{padding-left:1.4em;margin:0 0 1em}
li{margin-bottom:.35em}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.tag{display:inline-block;font-size:.78rem;padding:.15em .7em;border-radius:999px;background:var(--esg-soft);color:var(--esg);font-weight:600;letter-spacing:.02em;margin-right:.4em}
.tag.circ{background:var(--circ-soft);color:var(--circ)}
.tag.mat{background:var(--mat-soft);color:var(--mat)}
.tag.plastic{background:var(--plastic-soft);color:var(--plastic)}
.tag.metal{background:var(--metal-soft);color:#5b6672}
.tag.battery{background:var(--battery-soft);color:#a55f12}
.tag.risk{background:var(--risk-soft);color:var(--risk)}
.eyebrow{font-size:.85rem;letter-spacing:.12em;text-transform:uppercase;color:var(--esg);font-weight:700;margin-bottom:.5em;font-family:var(--mono)}
.section{padding:64px 0}
.section.alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section.dark{background:var(--graphite);color:#dfe5ec}
.section.dark h2,.section.dark h3,.section.dark h4{color:#fff}
.section.dark p{color:#c6ceda}
.section.dark .eyebrow{color:#5fc4bd}
.section-head{max-width:820px;margin-bottom:32px}
.section-head p{color:var(--text-2)}
.lead{font-size:1.05rem;color:var(--text-2)}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(28,33,41,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line-dark)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;position:relative}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:1.15rem}
.brand:hover{text-decoration:none}
.brand-mark{width:34px;height:34px;border-radius:8px;background:linear-gradient(135deg,var(--esg),var(--mat));display:grid;place-items:center;color:#fff;font-size:.72rem;font-family:var(--mono);letter-spacing:.05em}
.brand small{display:block;font-size:.68rem;font-weight:400;color:#9fb0c2;letter-spacing:.06em;line-height:1.1}
.nav{display:flex;gap:2px}
.nav a{color:#c9d3df;padding:8px 10px;border-radius:6px;font-size:.9rem;white-space:nowrap}
.nav a:hover{background:rgba(255,255,255,.08);text-decoration:none;color:#fff}
.nav a.active{background:var(--esg);color:#fff}
.nav-toggle{display:none;background:none;border:1px solid var(--line-dark);color:#fff;border-radius:6px;padding:6px 10px;font-size:1rem;cursor:pointer}

/* hero */
.hero{background:radial-gradient(1200px 500px at 15% -10%,rgba(15,110,110,.45),transparent 60%),radial-gradient(900px 500px at 90% 110%,rgba(91,95,199,.35),transparent 60%),var(--graphite);color:#e8edf3;padding:72px 0 56px;border-bottom:1px solid var(--line-dark)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.hero h1{color:#fff}
.hero .h1-sub{font-size:clamp(1.12rem,2.1vw,1.5rem);color:#fff;margin-bottom:1em;font-weight:600;line-height:1.5}
.hero p{color:#c4cdd9;font-size:1.02rem}
.hero-cta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.btn{display:inline-block;padding:10px 18px;border-radius:8px;font-weight:600;font-size:.95rem;border:1px solid transparent;cursor:pointer}
.btn.primary{background:var(--esg);color:#fff}
.btn.ghost{border-color:#56657a;color:#e8edf3}
.btn:hover{text-decoration:none;filter:brightness(1.1)}
.hero-figure{background:rgba(255,255,255,.04);border:1px solid var(--line-dark);border-radius:14px;padding:14px}
.hero-figure figcaption{font-size:.78rem;color:#9fb0c2;margin-top:8px;font-family:var(--mono)}
.page-hero{padding:56px 0 40px}
.page-hero .hero-grid{grid-template-columns:1.2fr .8fr}
.kpi-strip{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.kpi-strip span{font-family:var(--mono);font-size:.74rem;padding:4px 9px;border:1px solid #445266;border-radius:6px;color:#b9c6d6}
.crumbs{font-size:.8rem;color:#9fb0c2;font-family:var(--mono);margin-bottom:14px}
.crumbs a{color:#c9d3df}

/* figure */
.figure{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin:0 0 24px}
.figure figcaption{font-size:.82rem;color:var(--text-3);margin-top:10px;font-family:var(--mono)}
.figure.dark{background:var(--graphite-2);border-color:var(--line-dark)}
.figure.dark figcaption{color:#9fb0c2}
.scroll-x{overflow-x:auto;-webkit-overflow-scrolling:touch}
.scroll-x > img{min-width:640px}

/* grids */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.grid-2 > *,.grid-3 > *,.grid-4 > *,.about > *,.hero-grid > *,.matrix > div,.ladder .step{min-width:0}
.ladder .step b,.ladder .step span{overflow-wrap:anywhere}
.card{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.card h3{font-size:1.08rem}
.card p:last-child{margin-bottom:0}
.card.accent-esg{border-top:4px solid var(--esg)}
.card.accent-circ{border-top:4px solid var(--circ)}
.card.accent-mat{border-top:4px solid var(--mat)}
.card.accent-plastic{border-top:4px solid var(--plastic)}
.card.accent-metal{border-top:4px solid var(--metal)}
.card.accent-battery{border-top:4px solid var(--battery)}
.card.accent-risk{border-top:4px solid var(--risk)}

/* matrix / tables */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--bg-2);margin-bottom:20px}
table{border-collapse:collapse;width:100%;min-width:640px;font-size:.93rem}
th,td{padding:11px 13px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{background:var(--bg-soft);font-weight:700;white-space:nowrap}
tr:last-child td{border-bottom:none}
td.dim{color:var(--text-3)}
.matrix{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--bg-2)}
.matrix > div{padding:20px;border-right:1px solid var(--line)}
.matrix > div:last-child{border-right:none}
.matrix h3{display:flex;align-items:center;gap:8px;font-size:1.05rem}
.dot{width:12px;height:12px;border-radius:50%;display:inline-block}
.dot.e{background:var(--esg)}.dot.s{background:var(--mat)}.dot.g{background:var(--plastic)}
.matrix ul{margin:0;padding-left:1.1em;font-size:.93rem;color:var(--text-2)}

/* long articles */
.article-list{display:grid;gap:34px}
.article{background:var(--bg-2);border:1px solid var(--line);border-radius:14px;padding:30px;box-shadow:var(--shadow)}
.article header{margin-bottom:14px}
.article .meta{font-size:.82rem;color:var(--text-3);font-family:var(--mono);display:flex;flex-wrap:wrap;gap:12px;margin-bottom:8px}
.article h3{font-size:clamp(1.15rem,1.9vw,1.42rem)}
.article .summary p{color:var(--text)}
.article .struct{margin:18px 0}
.article details{margin-top:12px;border-top:1px dashed var(--line);padding-top:12px}
.article summary{cursor:pointer;color:var(--esg);font-weight:700;list-style:none;display:inline-flex;align-items:center;gap:6px}
.article summary::-webkit-details-marker{display:none}
.article summary::before{content:"+";display:inline-grid;place-items:center;width:20px;height:20px;border-radius:50%;background:var(--esg-soft);font-family:var(--mono)}
.article details[open] summary::before{content:"-"}
.article .full{margin-top:14px}
.article .full h4{margin-top:1.2em;color:var(--esg)}
.article .full p{color:var(--text)}
.article-sub{background:var(--bg-2);border:1px solid var(--line);border-radius:12px;padding:26px;margin-bottom:24px}
.article-sub h3{font-size:1.2rem}
.article-sub .meta{font-size:.8rem;color:var(--text-3);font-family:var(--mono);margin-bottom:8px}
.article-sub h4{margin-top:1.1em;color:var(--esg);font-size:1rem}
.pull{border-left:4px solid var(--circ);background:var(--circ-soft);padding:12px 16px;border-radius:0 8px 8px 0;margin:14px 0;color:#0d4a47}
.pull.risk{border-color:var(--risk);background:var(--risk-soft);color:#7a2b12}
.pull.mat{border-color:var(--mat);background:var(--mat-soft);color:#2d3070}
.flow{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-family:var(--mono);font-size:.8rem;margin:10px 0 18px}
.flow span{background:var(--bg-soft);border:1px solid var(--line);padding:4px 9px;border-radius:6px}
.flow i{font-style:normal;color:var(--text-3)}

/* feeds */
.feed{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.feed .item{background:var(--bg-2);border:1px solid var(--line);border-radius:10px;padding:20px;display:flex;flex-direction:column}
.feed .item h3{font-size:1.02rem;line-height:1.5}
.feed .item p{font-size:.93rem;color:var(--text-2);flex:1}
.feed .item a.more{font-size:.9rem;font-weight:600}
.feed.app{grid-template-columns:repeat(2,1fr)}
.feed-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:16px}
.feed-head h2{margin:0}
.feed-head a{font-size:.92rem;font-weight:600}

/* trends */
.trend-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.trend{background:var(--graphite-2);border:1px solid var(--line-dark);border-radius:10px;padding:20px;position:relative}
.trend .num{font-family:var(--mono);font-size:1.6rem;color:var(--circ);font-weight:700;line-height:1}
.trend h3{font-size:1rem;margin:10px 0 8px;color:#fff}
.trend p{font-size:.9rem;color:#b9c6d6;margin:0}

/* observation */
.obs{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.obs article{background:var(--bg-2);border:1px solid var(--line);border-left:5px solid var(--mat);border-radius:10px;padding:24px}
.obs h3{font-size:1.08rem}
.obs p{font-size:.95rem}

/* capability map */
.cap-map{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.cap{border-radius:10px;padding:20px;border:1px solid var(--line);background:var(--bg-2)}
.cap h3{font-size:1rem;display:flex;align-items:center;gap:8px}
.cap ul{font-size:.9rem;color:var(--text-2);margin:0;padding-left:1.1em}

/* FAQ */
.faq{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.faq details{background:var(--bg-2);border:1px solid var(--line);border-radius:10px;padding:0}
.faq summary{cursor:pointer;padding:16px 18px;font-weight:700;list-style:none;display:flex;justify-content:space-between;gap:10px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--mono);color:var(--esg);flex-shrink:0}
.faq details[open] summary::after{content:"-"}
.faq .answer{padding:0 18px 16px;color:var(--text-2);font-size:.95rem}
.faq .answer p{margin:0}

/* qa list */
.qa{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.qa .q{background:var(--bg-2);border:1px solid var(--line);border-radius:10px;padding:18px 20px}
.qa .q h3{font-size:1rem;margin-bottom:.4em}
.qa .q p{font-size:.93rem;color:var(--text-2);margin:0}

/* demos */
.demo{background:var(--graphite-2);border:1px solid var(--line-dark);border-radius:12px;padding:22px;color:#dfe5ec}
.demo h3{color:#fff;font-size:1.05rem}
.demo p{color:#c6ceda;font-size:.92rem}
.demo label{display:block;font-size:.85rem;color:#b9c6d6;margin:8px 0 4px;font-family:var(--mono)}
.demo input[type=range]{width:100%}
.demo .bars{display:grid;gap:8px;margin-top:12px}
.demo .bar{display:grid;grid-template-columns:130px 1fr 44px;align-items:center;gap:8px;font-size:.82rem;font-family:var(--mono)}
.demo .bar .track{height:10px;background:#3a4656;border-radius:6px;overflow:hidden}
.demo .bar .fill{height:100%;background:var(--circ);width:0;transition:width .4s}
.demo .bar .fill.b{background:var(--mat)}
.demo .note{font-size:.78rem;color:#9fb0c2;margin-top:12px;font-family:var(--mono)}
.demo .btn-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}
.demo button{background:#2f3a48;color:#e8edf3;border:1px solid #4a596c;border-radius:6px;padding:6px 12px;cursor:pointer;font-size:.85rem}
.demo button.on{background:var(--esg);border-color:var(--esg)}
.conveyor{position:relative;height:110px;background:repeating-linear-gradient(90deg,#2f3a48 0 28px,#28323f 28px 56px);border-radius:8px;overflow:hidden;margin-top:12px;border:1px solid #4a596c}
.conveyor .obj{position:absolute;top:34px;width:44px;height:42px;border-radius:8px;display:grid;place-items:center;font-size:.66rem;font-family:var(--mono);color:#fff;left:-50px;transition:left 1.2s linear,opacity .3s,top .4s}
.conveyor .gate{position:absolute;right:120px;top:0;bottom:0;width:2px;background:var(--risk);opacity:.7}
.conveyor .gate::after{content:"Sensor";position:absolute;top:4px;left:6px;font-size:.66rem;color:#f2a58a;font-family:var(--mono)}
.conveyor .bin{position:absolute;right:8px;font-size:.66rem;font-family:var(--mono);color:#9fb0c2;padding:2px 6px;border:1px dashed #4a596c;border-radius:4px}
.stream-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.stream-panel{display:none}
.stream-panel.on{display:block}
.ladder{display:grid;gap:6px}
.ladder .step{display:grid;grid-template-columns:150px 1fr;gap:12px;align-items:center;padding:10px 14px;border-radius:8px;background:var(--bg-2);border:1px solid var(--line);cursor:pointer;transition:transform .2s}
.ladder .step:hover,.ladder .step.on{border-color:var(--circ);background:var(--circ-soft);transform:translateX(6px)}
.ladder .step b{font-family:var(--mono);font-size:.85rem}
.ladder .step span{font-size:.9rem;color:var(--text-2)}
.ladder-note{font-size:.9rem;color:var(--text-2);min-height:3em;margin-top:10px;padding:12px;border:1px dashed var(--line);border-radius:8px}

/* timeline */
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.tl{background:var(--bg-2);border:1px solid var(--line);border-radius:10px;padding:16px;border-top:4px solid var(--plastic)}
.tl .when{font-family:var(--mono);font-size:.8rem;color:var(--text-3)}
.tl h3{font-size:.98rem;margin:.3em 0}
.tl p{font-size:.88rem;color:var(--text-2);margin:0}
.tl.done{border-top-color:var(--circ)}
.tl.planned{border-top-color:var(--battery)}

/* notices */
.notice{background:var(--bg-soft);border:1px solid var(--line);border-radius:10px;padding:16px 18px;font-size:.9rem;color:var(--text-2)}
.notice.risk{background:var(--risk-soft);border-color:#f0b9a5;color:#7a2b12}
.notice.battery{background:var(--battery-soft);border-color:#f0cc9d;color:#7a4a0e}
.notices{display:grid;gap:12px}
.about{display:grid;grid-template-columns:1.2fr .8fr;gap:28px;align-items:start}
.link-list{display:grid;gap:8px}
.link-list a{display:block;padding:10px 14px;border:1px solid var(--line);border-radius:8px;background:var(--bg-2);font-weight:600;font-size:.93rem}
.link-list a:hover{border-color:var(--esg);text-decoration:none}
.download{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.download .card{text-align:center}
.download .card .plat{font-family:var(--mono);font-size:.8rem;color:var(--text-3)}
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.feature{background:var(--bg-2);border:1px solid var(--line);border-radius:10px;padding:18px}
.feature .idx{font-family:var(--mono);color:var(--mat);font-size:.8rem}
.feature h3{font-size:1rem;margin:.3em 0}
.feature p{font-size:.88rem;color:var(--text-2);margin:0}

/* footer */
.site-footer{background:var(--graphite);color:#b9c6d6;padding:48px 0 28px;border-top:1px solid var(--line-dark);font-size:.9rem}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:28px;margin-bottom:28px}
.site-footer h4{color:#fff;font-size:.95rem}
.site-footer a{color:#c9d3df}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:6px}
.footer-legal{border-top:1px solid var(--line-dark);padding-top:18px;font-size:.82rem;color:#8e9db0}
.footer-legal p{margin:0 0 6px}
.footer-icp{font-family:var(--mono)}

/* reveal */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s,transform .6s}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* responsive */
@media (max-width:1100px){
  .nav a{padding:8px 7px;font-size:.84rem}
  .trend-grid,.grid-4,.feature-grid,.timeline{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1024px){
  .hero-grid,.page-hero .hero-grid{grid-template-columns:1fr}
  .grid-3,.feed,.obs,.cap-map,.matrix{grid-template-columns:1fr}
  .matrix > div{border-right:none;border-bottom:1px solid var(--line)}
  .matrix > div:last-child{border-bottom:none}
  .about{grid-template-columns:1fr}
}
@media (max-width:900px){
  .nav-toggle{display:block}
  .nav{display:none;position:absolute;left:0;right:0;top:64px;background:var(--graphite);flex-direction:column;padding:10px 16px 16px;border-bottom:1px solid var(--line-dark)}
  .nav.open{display:flex}
  .nav a{padding:12px 10px;font-size:1rem}
  .grid-2,.faq,.qa,.feed.app,.download,.footer-grid{grid-template-columns:1fr}
  .section{padding:48px 0}
  .article{padding:22px}
  .ladder .step{grid-template-columns:1fr}
}
@media (max-width:480px){
  .trend-grid,.grid-4,.feature-grid,.timeline{grid-template-columns:1fr}
  .hero{padding:48px 0 40px}
  .demo .bar{grid-template-columns:96px 1fr 40px}
  body{font-size:15.5px}
  .brand small{display:none}
}