/* 龙虎斗官网 - Earth Intelligence Operations Center 视觉体系 */
:root{
  --bg:#0b1320;--bg2:#101a2b;--bg3:#16233a;--panel:#12203a;--line:#22324d;--line2:#2e4260;
  --text:#dbe4f3;--muted:#96a6c2;--faint:#6b7c99;--white:#f5f8ff;
  --env:#2dd4bf;--env2:#0f766e;--water:#38bdf8;--sat:#8b7cf6;--sat2:#5b4bd6;
  --heat:#f97316;--heat2:#ef4444;--flood:#3b82f6;--dry:#c9a24a;--risk:#fb923c;--risk2:#dc2626;
  --light:#e9eef7;--light2:#f7f9fc;--dark-on-light:#13203a;
  --radius:14px;--maxw:1240px;--font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans CJK SC","Segoe UI",Roboto,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);background:var(--bg);color:var(--text);line-height:1.8;font-size:16px;overflow-x:hidden}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--water);text-decoration:none}
a:hover{color:var(--env)}
h1,h2,h3,h4{line-height:1.35;color:var(--white);margin:0 0 .6em;font-weight:700;letter-spacing:.01em}
h1{font-size:clamp(1.55rem,3.2vw,2.5rem)}
h2{font-size:clamp(1.3rem,2.4vw,1.85rem)}
h3{font-size:clamp(1.08rem,1.6vw,1.3rem)}
h4{font-size:1.02rem}
p{margin:0 0 1em}
ul,ol{padding-left:1.4em}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px;top:0}
.skip:focus{left:10px;top:10px;background:var(--env);color:#03201c;padding:8px 14px;z-index:999;border-radius:6px}

/* Header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(11,19,32,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;min-height:66px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;color:var(--white);font-weight:800;font-size:1.15rem;letter-spacing:.04em}
.brand-mark{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--env) 0%,var(--sat) 100%);position:relative;flex:none}
.brand-mark::after{content:"";position:absolute;inset:8px;border-radius:50%;border:2px solid #0b1320;border-right-color:transparent}
.brand small{display:block;font-size:.66rem;color:var(--muted);font-weight:500;letter-spacing:.12em;line-height:1.2}
.nav{display:flex;gap:2px;flex-wrap:wrap}
.nav a{padding:8px 11px;border-radius:8px;color:var(--text);font-size:.92rem;white-space:nowrap}
.nav a:hover,.nav a.active{background:var(--bg3);color:var(--env)}
.nav-toggle{display:none;background:var(--bg3);border:1px solid var(--line2);color:var(--text);padding:8px 12px;border-radius:8px;font-size:.9rem;cursor:pointer}

/* Hero */
.hero{padding:56px 0 40px;background:
  radial-gradient(900px 400px at 10% -10%,rgba(45,212,191,.16),transparent 60%),
  radial-gradient(700px 400px at 90% 0%,rgba(139,124,246,.18),transparent 60%),
  linear-gradient(180deg,var(--bg) 0%,var(--bg2) 100%);border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:36px;align-items:center}
.eyebrow{display:inline-flex;gap:8px;align-items:center;font-size:.78rem;letter-spacing:.16em;text-transform:uppercase;color:var(--env);background:rgba(45,212,191,.08);border:1px solid rgba(45,212,191,.3);padding:5px 12px;border-radius:999px;margin-bottom:16px}
.hero p.lead{font-size:1.05rem;color:var(--muted)}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 22px}
.tag{font-size:.78rem;padding:4px 10px;border-radius:6px;border:1px solid var(--line2);color:var(--muted);background:rgba(255,255,255,.02)}
.tag.env{border-color:rgba(45,212,191,.5);color:var(--env)}
.tag.sat{border-color:rgba(139,124,246,.55);color:#b8aeff}
.tag.heat{border-color:rgba(249,115,22,.55);color:#fdba74}
.tag.flood{border-color:rgba(59,130,246,.6);color:#93c5fd}
.btn{display:inline-block;padding:11px 20px;border-radius:9px;font-weight:600;font-size:.95rem;border:1px solid transparent}
.btn.primary{background:var(--env);color:#03201c}
.btn.primary:hover{background:#5eead4;color:#03201c}
.btn.ghost{border-color:var(--line2);color:var(--text)}
.btn.ghost:hover{border-color:var(--env);color:var(--env)}
.btn-row{display:flex;gap:12px;flex-wrap:wrap}
.hero-visual{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:14px;box-shadow:0 30px 60px rgba(0,0,0,.35)}
.hero-visual figcaption,.figure figcaption{font-size:.8rem;color:var(--faint);margin-top:8px;line-height:1.5}

/* Sections */
section{padding:56px 0}
section.alt{background:var(--bg2)}
section.light{background:var(--light);color:var(--dark-on-light)}
section.light h2,section.light h3,section.light h4{color:var(--dark-on-light)}
section.light p{color:#34435e}
section.light a{color:#0e5aa8}
.sec-head{max-width:820px;margin-bottom:28px}
.sec-head .kicker{color:var(--env);font-size:.8rem;letter-spacing:.16em;text-transform:uppercase;font-weight:600;margin-bottom:8px}
section.light .kicker{color:var(--env2)}
.sec-head p{color:var(--muted)}
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.card h3{font-size:1.05rem}
.card p{color:var(--muted);font-size:.94rem;margin-bottom:.4em}
.card.env{border-top:3px solid var(--env)}
.card.water{border-top:3px solid var(--water)}
.card.sat{border-top:3px solid var(--sat)}
.card.heat{border-top:3px solid var(--heat)}
.card.flood{border-top:3px solid var(--flood)}
.card.dry{border-top:3px solid var(--dry)}
.card.risk{border-top:3px solid var(--risk)}
section.light .card{background:#fff;border-color:#d7deea}
section.light .card p{color:#4a5872}

/* Flow chain (Environment → Risk) */
.chain{display:flex;flex-wrap:wrap;align-items:stretch;gap:8px;margin:22px 0}
.chain .node{flex:1 1 120px;min-width:110px;background:var(--bg3);border:1px solid var(--line2);border-radius:10px;padding:10px 12px;text-align:center;font-size:.86rem;position:relative}
.chain .node b{display:block;color:var(--white);font-size:.9rem}
.chain .node span{color:var(--muted);font-size:.76rem}
.chain .node.env{border-color:var(--env)}
.chain .node.sat{border-color:var(--sat)}
.chain .node.heat{border-color:var(--heat)}
.chain .node.flood{border-color:var(--flood)}
.chain .node.risk{border-color:var(--risk)}
.chain .arrow{align-self:center;color:var(--faint);font-size:1.1rem;flex:0 0 auto}
.vchain{list-style:none;padding:0;margin:14px 0;border-left:2px solid var(--line2)}
.vchain li{position:relative;padding:4px 0 4px 18px;font-size:.92rem;color:var(--text)}
.vchain li::before{content:"";position:absolute;left:-7px;top:14px;width:12px;height:12px;border-radius:50%;background:var(--env);border:2px solid var(--bg)}
.vchain li:nth-child(n+5)::before{background:var(--sat)}
.vchain li:nth-child(n+8)::before{background:var(--heat)}
.vchain li:last-child::before{background:var(--risk)}

/* Feature articles */
.feature{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:28px;margin-bottom:22px;display:grid;grid-template-columns:1fr 300px;gap:26px}
.feature.flip{grid-template-columns:300px 1fr}
.feature .meta{display:flex;gap:12px;flex-wrap:wrap;font-size:.8rem;color:var(--faint);margin-bottom:8px}
.feature .meta .cat{color:var(--env);border:1px solid rgba(45,212,191,.4);padding:1px 8px;border-radius:5px}
.feature h3{font-size:1.2rem;color:var(--white)}
.feature p{color:var(--text);font-size:.96rem}
.feature aside{background:var(--bg3);border:1px solid var(--line2);border-radius:10px;padding:14px;align-self:start}
.feature aside h4{font-size:.86rem;color:var(--muted);letter-spacing:.08em;text-transform:uppercase}
.feature aside ol{margin:0;padding-left:1.2em;font-size:.86rem;color:var(--text)}
.feature aside ol li{padding:2px 0}
.feature .more{display:inline-block;margin-top:8px;font-weight:600}

/* Long articles on inner pages */
.article{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:30px;margin-bottom:26px}
.article header{margin-bottom:14px;border-bottom:1px solid var(--line);padding-bottom:12px}
.article .meta{font-size:.8rem;color:var(--faint);display:flex;gap:14px;flex-wrap:wrap}
.article .meta .cat{color:var(--env)}
.article h2{font-size:1.35rem}
.article h3{font-size:1.08rem;color:var(--env);margin-top:1.2em}
.article p{font-size:.98rem}
.article blockquote{margin:1em 0;padding:12px 18px;border-left:3px solid var(--sat);background:var(--bg3);border-radius:0 10px 10px 0;color:var(--muted);font-size:.95rem}
.article .steps{counter-reset:s;list-style:none;padding:0;display:grid;gap:8px;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));margin:12px 0}
.article .steps li{counter-increment:s;background:var(--bg3);border:1px solid var(--line2);border-radius:10px;padding:10px 12px 10px 40px;position:relative;font-size:.88rem}
.article .steps li::before{content:counter(s);position:absolute;left:12px;top:10px;width:20px;height:20px;border-radius:50%;background:var(--env);color:#03201c;font-size:.75rem;font-weight:700;text-align:center;line-height:20px}
.figure{margin:18px 0;background:var(--bg3);border:1px solid var(--line2);border-radius:12px;padding:14px}

/* Trends */
.trend-list{counter-reset:t;list-style:none;padding:0;display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.trend-list li{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:20px 20px 20px 62px;position:relative}
.trend-list li::before{counter-increment:t;content:"0" counter(t);position:absolute;left:18px;top:18px;font-family:var(--mono);font-size:1.1rem;color:var(--sat);font-weight:700}
.trend-list h3{font-size:1rem;margin-bottom:.4em}
.trend-list p{font-size:.9rem;color:var(--muted);margin:0}

/* Observation column */
.observe{background:linear-gradient(180deg,var(--panel),var(--bg3));border:1px solid var(--line2);border-radius:var(--radius);padding:28px;margin-bottom:20px;border-left:4px solid var(--sat)}
.observe h3{font-size:1.15rem}
.observe p{font-size:.96rem}

/* Capability map */
.capmap{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.capmap .cap{border-radius:12px;padding:18px;border:1px solid var(--line2);background:var(--panel)}
.capmap .cap h3{font-size:1rem;display:flex;align-items:center;gap:8px}
.capmap .cap .dot{width:10px;height:10px;border-radius:50%;display:inline-block}
.capmap .cap ul{padding-left:1.1em;margin:0;font-size:.86rem;color:var(--muted)}
.capmap .cap li{padding:2px 0}

/* Digest of inner-page articles */
.digest{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.digest article{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:20px;display:flex;flex-direction:column}
.digest article h3{font-size:1rem}
.digest article p{color:var(--muted);font-size:.9rem;flex:1}
.digest article a.more{font-weight:600;font-size:.9rem}
.digest.app{grid-template-columns:repeat(2,1fr)}

/* Interactive consoles */
.console{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-top:22px}
.console .tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.console .tabs button{background:var(--bg3);border:1px solid var(--line2);color:var(--text);padding:7px 14px;border-radius:8px;cursor:pointer;font-size:.88rem}
.console .tabs button.active{border-color:var(--env);color:var(--env)}
.console .pane{display:none}
.console .pane.active{display:block}
.layer-map{position:relative;height:280px;border-radius:12px;overflow:hidden;background:
  linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px) 0 0/40px 40px,
  linear-gradient(0deg,rgba(255,255,255,.04) 1px,transparent 1px) 0 0/40px 40px,#0d1727;border:1px solid var(--line2)}
.layer-map .blob{position:absolute;border-radius:50%;filter:blur(14px);opacity:.75}
.layer-map .pin{position:absolute;width:12px;height:12px;border-radius:50%;background:#fff;border:3px solid var(--risk);box-shadow:0 0 0 6px rgba(251,146,60,.2)}
.layer-map .lbl{position:absolute;font-size:.72rem;background:rgba(11,19,32,.8);border:1px solid var(--line2);padding:2px 7px;border-radius:5px;color:var(--text)}
.console .note{font-size:.8rem;color:var(--faint);margin-top:10px}
.compare{position:relative;height:280px;border-radius:12px;overflow:hidden;border:1px solid var(--line2)}
.compare .before,.compare .after{position:absolute;inset:0}
.compare .before{background:linear-gradient(135deg,#1b3a2e 0%,#245c3a 35%,#1d4a33 60%,#2c6a45 100%)}
.compare .after{background:linear-gradient(135deg,#1b3a2e 0%,#5a4a2a 30%,#7a5c2d 55%,#2c6a45 100%);clip-path:inset(0 0 0 50%)}
.compare .river{position:absolute;left:0;right:0;top:56%;height:26px;background:linear-gradient(90deg,#1e5f8a,#2a7fb0,#1e5f8a);transform:rotate(-6deg);opacity:.9}
.compare .after .river{height:58px;top:50%;background:linear-gradient(90deg,#2b6fa8,#3b8fd0,#2b6fa8)}
.compare .handle{position:absolute;top:0;bottom:0;left:50%;width:2px;background:#fff;pointer-events:none}
.compare .handle::after{content:"◀ ▶";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background:#fff;color:#0b1320;font-size:.7rem;padding:4px 8px;border-radius:999px;white-space:nowrap}
.compare .date{position:absolute;bottom:8px;font-size:.72rem;background:rgba(11,19,32,.85);padding:3px 8px;border-radius:5px;border:1px solid var(--line2)}
.compare .date.l{left:8px}.compare .date.r{right:8px}
.compare input[type=range]{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:ew-resize;margin:0}
.scenario .row{display:grid;grid-template-columns:180px 1fr;gap:12px;align-items:center;padding:8px 0;border-bottom:1px solid var(--line)}
.scenario .bar{height:14px;border-radius:7px;background:var(--bg3);overflow:hidden;position:relative}
.scenario .bar i{display:block;height:100%;background:linear-gradient(90deg,var(--flood),var(--risk));transition:width .5s ease;border-radius:7px}
.scenario .bar em{position:absolute;right:8px;top:-3px;font-size:.72rem;color:var(--white);font-style:normal}
.scenario .range{font-size:.78rem;color:var(--faint)}

/* Matrix / tables */
.table-wrap{overflow-x:auto;border-radius:12px;border:1px solid var(--line2)}
table{width:100%;border-collapse:collapse;font-size:.9rem;min-width:560px}
th,td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{background:var(--bg3);color:var(--white);font-weight:600;font-size:.84rem;letter-spacing:.04em}
td{color:var(--text)}
tr:last-child td{border-bottom:none}
.lvl{display:inline-block;padding:1px 8px;border-radius:5px;font-size:.78rem;font-weight:600}
.lvl.low{background:rgba(45,212,191,.18);color:var(--env)}
.lvl.mid{background:rgba(201,162,74,.2);color:#e8c46a}
.lvl.high{background:rgba(220,38,38,.2);color:#fca5a5}
section.light .table-wrap{border-color:#d7deea}
section.light th{background:#e0e7f2;color:#13203a}
section.light td{color:#2c3a55;border-color:#e3e9f3}

/* FAQ */
.faq{max-width:900px}
.faq details{background:var(--panel);border:1px solid var(--line);border-radius:10px;margin-bottom:10px;padding:0 18px}
.faq summary{cursor:pointer;padding:14px 0;font-weight:600;color:var(--white);list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--env);font-size:1.3rem;line-height:1}
.faq details[open] summary::after{content:"−"}
.faq details p{padding:0 0 16px;color:var(--muted);font-size:.94rem;margin:0}

/* QA blocks (是什么/怎么用) */
.qa{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.qa .q{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px}
.qa .q h3{font-size:1rem;color:var(--env)}
.qa .q p{font-size:.92rem;color:var(--muted);margin:0}

/* App */
.features8{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.features8 .f{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px}
.features8 .f .n{font-family:var(--mono);color:var(--sat);font-size:.8rem}
.features8 .f h3{font-size:1rem;margin:.3em 0}
.features8 .f p{font-size:.86rem;color:var(--muted);margin:0}
.download{background:linear-gradient(135deg,var(--panel),var(--bg3));border:1px solid var(--line2);border-radius:var(--radius);padding:28px;display:grid;grid-template-columns:1fr 1fr;gap:22px}
.download .dl{border:1px dashed var(--line2);border-radius:12px;padding:16px;text-align:center;color:var(--muted);font-size:.9rem}
.download .dl b{display:block;color:var(--white);margin-bottom:6px}
.download .dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}

/* Notice */
.notice{background:rgba(139,124,246,.08);border:1px solid rgba(139,124,246,.35);border-radius:10px;padding:14px 18px;font-size:.88rem;color:var(--muted)}
.notice.warn{background:rgba(249,115,22,.08);border-color:rgba(249,115,22,.4)}

/* Breadcrumb */
.crumb{font-size:.82rem;color:var(--faint);padding:14px 0 0}
.crumb a{color:var(--muted)}
.page-head{padding:34px 0 30px;background:linear-gradient(180deg,var(--bg2),var(--bg));border-bottom:1px solid var(--line)}
.page-head p{color:var(--muted);max-width:860px}

/* Footer */
.site-footer{background:#080e19;border-top:1px solid var(--line);padding:40px 0 26px;font-size:.88rem;color:var(--muted)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:26px;margin-bottom:22px}
.site-footer h4{color:var(--white);font-size:.95rem}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{padding:3px 0}
.site-footer a{color:var(--muted)}
.site-footer a:hover{color:var(--env)}
.disclaimers{border-top:1px solid var(--line);padding-top:16px;font-size:.78rem;color:var(--faint);line-height:1.7}
.disclaimers p{margin-bottom:.6em}
.copyright{margin-top:14px;font-size:.8rem;color:var(--faint)}
.copyright b{color:var(--text)}

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

/* Responsive */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr}
  .g4,.capmap,.features8{grid-template-columns:repeat(2,1fr)}
  .g3,.digest{grid-template-columns:repeat(2,1fr)}
  .feature,.feature.flip{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:900px){
  .nav{display:none;position:absolute;left:0;right:0;top:66px;background:var(--bg2);border-bottom:1px solid var(--line);flex-direction:column;padding:10px 16px 16px}
  .nav.open{display:flex}
  .nav a{padding:11px 10px;font-size:1rem}
  .nav-toggle{display:inline-block}
}
@media (max-width:768px){
  section{padding:42px 0}
  .g2,.g3,.g4,.digest,.digest.app,.qa,.trend-list,.capmap,.features8,.download{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .scenario .row{grid-template-columns:1fr}
  .download .dl-grid{grid-template-columns:1fr}
  .layer-map,.compare{height:230px}
  .article,.feature{padding:20px}
  .chain{flex-direction:column}
  .chain .arrow{transform:rotate(90deg)}
}
@media (max-width:430px){
  body{font-size:15px}
  .hero{padding:36px 0 28px}
  .brand{font-size:1rem}
  .btn{padding:10px 14px;font-size:.9rem}
}