/* 龙虎斗官网 - ESG Risk Intelligence / Green Finance AI
   纯本地 CSS，无远程字体、无远程样式 */
:root{
  --bg:#f4f5f7;
  --bg-2:#ebedf1;
  --paper:#ffffff;
  --ink:#1c2230;
  --ink-2:#3d4657;
  --muted:#6b7482;
  --line:#d9dde4;
  --graphite:#1f2530;
  --graphite-2:#2a3140;
  --navy:#2b3a55;
  --navy-2:#354a6e;
  --env:#1f8a7a;      /* Environmental 青绿 */
  --soc:#2f6fd1;      /* Social 蓝 */
  --gov:#5b52b8;      /* Governance 蓝紫 */
  --risk:#d9782a;     /* Risk 橙 */
  --risk-2:#c1362e;   /* Risk 红 */
  --fin:#136a6b;      /* Green Finance 深青 */
  --evi:#5c6f8a;      /* Evidence 冷灰蓝 */
  --evi-bg:#e8edf4;
  --radius:10px;
  --shadow:0 1px 2px rgba(20,25,35,.06),0 8px 24px rgba(20,25,35,.06);
  --maxw:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans CJK SC","Source Han Sans SC",-apple-system,"Segoe UI",Roboto,Arial,sans-serif;font-size:16px;line-height:1.85;overflow-x:hidden}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--navy-2);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(--ink)}
h1{font-size:clamp(1.5rem,3.2vw,2.35rem)}
h2{font-size:clamp(1.3rem,2.4vw,1.75rem)}
h3{font-size:clamp(1.08rem,1.7vw,1.25rem)}
h4{font-size:1.02rem}
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{position:absolute;left:-9999px}
.small{font-size:.9rem;color:var(--muted)}
.tag{display:inline-block;padding:.1em .6em;border-radius:999px;font-size:.78rem;font-weight:600;letter-spacing:.02em;background:var(--evi-bg);color:var(--evi);margin-right:.4em}
.tag.e{background:#e3f3f0;color:var(--env)}
.tag.s{background:#e4edfb;color:var(--soc)}
.tag.g{background:#e9e7f7;color:var(--gov)}
.tag.r{background:#fbeae0;color:var(--risk)}
.tag.f{background:#dff0ef;color:var(--fin)}
.tag.k{background:#2a3140;color:#dfe5ee}

/* ---------- Header / Nav ---------- */
.site-header{background:var(--graphite);color:#e6eaf0;position:sticky;top:0;z-index:50;border-bottom:1px solid #313a48}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;min-height:64px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:1.15rem;white-space:nowrap}
.brand:hover{text-decoration:none}
.brand-mark{width:34px;height:34px;flex:0 0 34px}
.brand small{display:block;font-size:.68rem;font-weight:400;color:#9aa5b5;letter-spacing:.06em;line-height:1.1}
.nav{display:flex;gap:2px;flex-wrap:wrap}
.nav a{color:#c9d1dc;padding:8px 11px;border-radius:6px;font-size:.92rem;white-space:nowrap}
.nav a:hover,.nav a.active{background:#313a48;color:#fff;text-decoration:none}
.nav-toggle{display:none;background:none;border:1px solid #4a5364;color:#fff;border-radius:6px;padding:6px 10px;font-size:1rem;cursor:pointer}
@media (max-width:1024px){
  .nav-toggle{display:block}
  .nav{display:none;position:absolute;left:0;right:0;top:64px;background:var(--graphite-2);flex-direction:column;padding:10px 20px 16px;border-bottom:1px solid #3a4453}
  .nav.open{display:flex}
  .nav a{padding:11px 8px;border-bottom:1px solid #3a4453;border-radius:0}
}

/* ---------- Hero ---------- */
.hero{background:linear-gradient(135deg,#1f2530 0%,#2b3a55 60%,#1f3a44 100%);color:#e9edf3;padding:56px 0 48px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(600px 300px at 85% 20%,rgba(31,138,122,.18),transparent 60%),radial-gradient(500px 260px at 10% 90%,rgba(91,82,184,.16),transparent 60%);pointer-events:none}
.hero .wrap{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}
.hero h1{color:#fff;font-size:clamp(1.45rem,2.6vw,2.1rem)}
.hero .kicker{color:#8fd3c7;font-weight:600;letter-spacing:.08em;font-size:.82rem;text-transform:uppercase;margin-bottom:14px}
.hero p{color:#c9d3e0;font-size:1.02rem}
.hero-title{font-size:clamp(1.2rem,2.2vw,1.6rem);color:#f3f6fa;font-weight:600;line-height:1.5;margin-bottom:16px}
.hero-visual{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.12);border-radius:14px;padding:12px}
.hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.btn{display:inline-block;padding:10px 18px;border-radius:8px;font-weight:600;font-size:.94rem;border:1px solid transparent}
.btn:hover{text-decoration:none}
.btn-primary{background:#1f8a7a;color:#fff}
.btn-primary:hover{background:#177466}
.btn-ghost{border-color:rgba(255,255,255,.35);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.08)}
.btn-dark{background:var(--navy);color:#fff}
.btn-dark:hover{background:var(--navy-2)}
.page-hero{padding:44px 0 36px}
.page-hero .wrap{grid-template-columns:1fr}
.breadcrumb{font-size:.85rem;color:#9fb0c6;margin-bottom:12px}
.breadcrumb a{color:#c9d3e0}
@media (max-width:900px){.hero .wrap{grid-template-columns:1fr}.hero{padding:40px 0 34px}}

/* ---------- Sections ---------- */
.section{padding:52px 0}
.section.alt{background:var(--bg-2)}
.section.dark{background:var(--graphite);color:#dfe5ee}
.section.dark h2,.section.dark h3{color:#fff}
.section.dark p{color:#c3ccd8}
.section-head{max-width:820px;margin-bottom:28px}
.section-head .eyebrow{color:var(--fin);font-weight:700;font-size:.8rem;letter-spacing:.1em;text-transform:uppercase;margin-bottom:6px}
.section.dark .eyebrow{color:#8fd3c7}
.lead{font-size:1.06rem;color:var(--ink-2)}

/* ---------- Grids / panels ---------- */
.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
@media (max-width:1024px){.grid-4{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:680px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}
.panel{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:22px 22px 16px;box-shadow:var(--shadow)}
.panel h3{margin-top:0}
.panel.e{border-top:4px solid var(--env)}
.panel.s{border-top:4px solid var(--soc)}
.panel.g{border-top:4px solid var(--gov)}
.panel.r{border-top:4px solid var(--risk)}
.panel.f{border-top:4px solid var(--fin)}
.panel.v{border-top:4px solid var(--evi)}
.figure{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:14px;margin:18px 0}
.figure figcaption{font-size:.86rem;color:var(--muted);margin-top:8px;line-height:1.6}
.figure.scroll{overflow-x:auto}
.figure.scroll svg{min-width:720px}
.section.dark .figure{background:#2a3140;border-color:#3a4453}
.section.dark .figure figcaption{color:#9aa5b5}

/* ---------- Flow / steps ---------- */
.flow{display:flex;flex-wrap:wrap;gap:8px;align-items:stretch;margin:12px 0 18px}
.flow span{background:var(--paper);border:1px solid var(--line);padding:6px 12px;border-radius:6px;font-size:.88rem;font-weight:600;color:var(--ink-2);position:relative}
.flow span.arrow{border:none;background:none;color:var(--muted);padding:6px 2px;font-weight:400}
.flow span.hl{border-color:var(--fin);color:var(--fin);background:#e7f2f1}
.flow span.rk{border-color:var(--risk);color:var(--risk);background:#fbeee4}
.section.dark .flow span{background:#2a3140;border-color:#3f4959;color:#dfe5ee}
.section.dark .flow span.arrow{background:none;border:none;color:#8a95a6}
.ladder{list-style:none;padding:0;margin:14px 0;counter-reset:l}
.ladder li{position:relative;padding:10px 14px 10px 54px;margin:0 0 6px;background:var(--paper);border:1px solid var(--line);border-radius:8px;counter-increment:l}
.ladder li::before{content:counter(l);position:absolute;left:12px;top:9px;width:30px;height:30px;border-radius:50%;background:var(--navy);color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;font-size:.85rem}
.ladder li strong{display:block;color:var(--ink)}
.ladder li span{font-size:.92rem;color:var(--ink-2)}

/* ---------- Articles ---------- */
.article-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:26px 26px 18px;box-shadow:var(--shadow);margin-bottom:22px}
.article-card .meta{font-size:.84rem;color:var(--muted);margin-bottom:8px;display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.article-card h3{font-size:clamp(1.08rem,1.6vw,1.3rem);line-height:1.5}
.article-card .more{font-weight:600;display:inline-block;margin-top:4px}
.article-long{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:30px;margin-bottom:28px;box-shadow:var(--shadow)}
.article-long h2{font-size:clamp(1.2rem,2vw,1.55rem);line-height:1.5}
.article-long h3{margin-top:1.4em;font-size:1.08rem;color:var(--navy)}
.article-long .meta{font-size:.84rem;color:var(--muted);margin-bottom:12px}
.article-long p{color:var(--ink-2)}
.callout{border-left:4px solid var(--fin);background:#eef5f4;padding:12px 16px;border-radius:0 8px 8px 0;margin:16px 0;color:var(--ink-2)}
.callout.r{border-color:var(--risk);background:#fbf0e8}
.callout.v{border-color:var(--evi);background:var(--evi-bg)}
.summary-list{display:grid;gap:18px}
.summary-list .item{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px 14px}
.summary-list .item h3{font-size:1.05rem;line-height:1.5}
.summary-list .item p{color:var(--ink-2);font-size:.96rem}

/* ---------- Tables ---------- */
.table-wrap{overflow-x:auto;margin:14px 0 18px;border:1px solid var(--line);border-radius:8px;background:var(--paper)}
table{border-collapse:collapse;width:100%;min-width:560px;font-size:.92rem}
th,td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{background:var(--bg-2);color:var(--ink);font-weight:700;white-space:nowrap}
tr:last-child td{border-bottom:none}
.section.dark .table-wrap{background:#2a3140;border-color:#3f4959}
.section.dark th{background:#333c4c;color:#fff}
.section.dark td{border-color:#3f4959;color:#dfe5ee}

/* ---------- Timeline demo ---------- */
.timeline{display:flex;flex-wrap:wrap;gap:6px;margin:14px 0}
.timeline button{background:var(--paper);border:1px solid var(--line);padding:8px 12px;border-radius:6px;cursor:pointer;font-size:.86rem;font-weight:600;color:var(--ink-2);font-family:inherit}
.timeline button.on{background:var(--navy);color:#fff;border-color:var(--navy)}
.timeline-detail{background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:16px 18px;min-height:120px}
.timeline-detail strong{color:var(--navy)}
.status{display:inline-block;padding:.1em .6em;border-radius:4px;font-size:.8rem;font-weight:700}
.status.open{background:#fbeae0;color:var(--risk)}
.status.closed{background:#e3f3f0;color:var(--env)}
.status.neutral{background:var(--evi-bg);color:var(--evi)}

/* ---------- Evidence tabs ---------- */
.tabs{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px}
.tabs button{background:var(--bg-2);border:1px solid var(--line);padding:7px 12px;border-radius:6px;cursor:pointer;font-size:.86rem;font-weight:600;color:var(--ink-2);font-family:inherit}
.tabs button.on{background:var(--evi);color:#fff;border-color:var(--evi)}
.tab-pane{display:none;background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:16px 18px}
.tab-pane.on{display:block}
.src-row{display:flex;gap:10px;align-items:flex-start;padding:8px 0;border-bottom:1px dashed var(--line);font-size:.92rem}
.src-row:last-child{border-bottom:none}
.src-row .lv{flex:0 0 74px;font-weight:700;color:var(--evi);font-size:.8rem}

/* ---------- Risk matrix ---------- */
.matrix{display:grid;grid-template-columns:90px repeat(3,1fr);gap:4px;margin:14px 0;font-size:.84rem}
.matrix .h{font-weight:700;color:var(--muted);display:flex;align-items:center;justify-content:center;padding:6px;text-align:center}
.matrix .cell{padding:10px 8px;border-radius:6px;min-height:64px;background:var(--paper);border:1px solid var(--line);cursor:pointer;transition:transform .12s}
.matrix .cell:hover{transform:translateY(-2px)}
.matrix .cell.lo{background:#e3f3f0}
.matrix .cell.md{background:#fbf0e8}
.matrix .cell.hi{background:#f8dedb}
.matrix-note{background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:12px 16px;font-size:.92rem;min-height:56px}

/* ---------- Score attribution demo ---------- */
.attr{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:18px 20px}
.attr .bar{display:flex;align-items:center;gap:10px;margin:8px 0;font-size:.9rem}
.attr .bar label{flex:0 0 190px;color:var(--ink-2)}
.attr .bar .track{flex:1;height:12px;background:var(--bg-2);border-radius:6px;overflow:hidden}
.attr .bar .fill{height:100%;background:var(--evi);width:0;transition:width .4s}
.attr .bar .fill.r{background:var(--risk)}
.attr .bar .fill.f{background:var(--fin)}
.attr .bar em{flex:0 0 54px;font-style:normal;font-weight:700;text-align:right}
.attr .ctrl{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:10px}
.attr .ctrl button{background:var(--bg-2);border:1px solid var(--line);padding:6px 12px;border-radius:6px;cursor:pointer;font-family:inherit;font-size:.86rem;font-weight:600}
.attr .ctrl button.on{background:var(--navy);color:#fff;border-color:var(--navy)}
.attr .out{margin-top:10px;font-size:.92rem;color:var(--ink-2);border-top:1px dashed var(--line);padding-top:10px}
.score{font-size:2rem;font-weight:800;color:var(--navy);line-height:1}
.demo-note{font-size:.8rem;color:var(--muted);margin-top:8px}

/* ---------- Trends ---------- */
.trend{display:grid;grid-template-columns:auto 1fr;gap:14px;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px}
.trend .n{font-size:1.5rem;font-weight:800;color:var(--fin);line-height:1;padding-top:4px}
.trend h3{font-size:1.02rem;margin-bottom:.4em}
.trend p{font-size:.94rem;color:var(--ink-2);margin:0}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line);padding:4px 0}
.faq summary{cursor:pointer;font-weight:700;padding:12px 30px 12px 0;position:relative;list-style:none;color:var(--ink)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:6px;top:10px;color:var(--fin);font-size:1.3rem;font-weight:400}
.faq details[open] summary::after{content:"−"}
.faq .a{padding:0 0 14px;color:var(--ink-2)}

/* ---------- Feature list / app ---------- */
.feature{display:flex;gap:14px;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.feature .ic{width:44px;height:44px;flex:0 0 44px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-weight:800;color:#fff;background:var(--navy);font-size:.9rem}
.feature h3{font-size:1.02rem;margin:0 0 .3em}
.feature p{font-size:.93rem;margin:0;color:var(--ink-2)}
.download-box{background:var(--paper);border:2px dashed var(--line);border-radius:var(--radius);padding:24px}
.download-box .row{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:14px}
.download-box .row div{background:var(--bg-2);border-radius:8px;padding:16px;text-align:center}
.download-box .row strong{display:block;margin-bottom:4px}
@media (max-width:680px){.download-box .row{grid-template-columns:1fr}}

/* ---------- Notice / disclaimers ---------- */
.notice{background:var(--paper);border:1px solid var(--line);border-left:4px solid var(--evi);padding:14px 18px;border-radius:0 8px 8px 0;font-size:.9rem;color:var(--ink-2);margin:12px 0}
.notice.f{border-left-color:var(--fin)}
.notice.r{border-left-color:var(--risk)}

/* ---------- Links list ---------- */
.link-list{display:flex;flex-wrap:wrap;gap:10px;margin:10px 0}
.link-list a{background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:9px 14px;font-weight:600;font-size:.92rem;color:var(--navy)}
.link-list a:hover{border-color:var(--navy);text-decoration:none}

/* ---------- Footer ---------- */
.site-footer{background:var(--graphite);color:#aeb7c4;padding:40px 0 28px;font-size:.88rem;border-top:1px solid #313a48}
.site-footer .cols{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:28px;margin-bottom:24px}
.site-footer h4{color:#fff;font-size:.95rem;margin-bottom:.6em}
.site-footer a{color:#c9d1dc}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:.35em}
.site-footer .legal{border-top:1px solid #313a48;padding-top:16px;font-size:.82rem;color:#8a95a6;line-height:1.7}
.site-footer .legal strong{color:#dfe5ee}
@media (max-width:820px){.site-footer .cols{grid-template-columns:1fr}}

/* ---------- Misc ---------- */
.kv{display:grid;grid-template-columns:150px 1fr;gap:6px 14px;font-size:.93rem}
.kv dt{font-weight:700;color:var(--ink)}
.kv dd{margin:0;color:var(--ink-2)}
@media (max-width:560px){.kv{grid-template-columns:1fr}.kv dd{margin-bottom:8px}}
.two-col{columns:2;column-gap:36px}
@media (max-width:820px){.two-col{columns:1}}
.anchor-offset{scroll-margin-top:80px}
.vs{display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:center;margin:14px 0}
.vs .box{background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:14px 16px;font-size:.93rem}
.vs .box strong{display:block;margin-bottom:4px;color:var(--navy)}
.vs .ne{font-weight:800;color:var(--risk);font-size:1.2rem;text-align:center}
@media (max-width:680px){.vs{grid-template-columns:1fr}.vs .ne{padding:4px 0}}