/* ==========================================================================
   金沙国际 / Longming International
   Global Carbon Management + International ESG Reporting
   静态站点样式表 —— HTML5 + CSS3，无远程资源，无框架
   ========================================================================== */

:root{
  --navy-950:#060b16;
  --navy-900:#0a1220;
  --navy-850:#0e1a2c;
  --navy-800:#122238;
  --navy-700:#182c46;
  --navy-600:#213a5c;
  --graphite:#1a1f27;
  --line:#233250;
  --line-soft:#1a2740;
  --cyan:#33d6e0;
  --cyan-dim:#1f8f96;
  --green:#4fd48a;
  --green-dim:#2e9a63;
  --amber:#e8b84b;
  --red:#e2596b;
  --white:#eef3fa;
  --white-dim:#aebbd1;
  --white-mute:#7d8bab;
  --card-bg:#0d1728;
  --card-bg-2:#101c31;
  --radius:14px;
  --radius-sm:8px;
  --maxw:1180px;
  --shadow:0 18px 40px -22px rgba(0,0,0,.65);
  font-size:16px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--navy-950);
  color:var(--white);
  font-family:"Segoe UI","PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,sans-serif;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--cyan);text-decoration:none;}
a:hover{text-decoration:underline;}
h1,h2,h3,h4{color:var(--white);line-height:1.35;font-weight:700;margin:0 0 .6em;}
p{margin:0 0 1em;color:var(--white-dim);}
ul,ol{color:var(--white-dim);padding-left:1.3em;}
li{margin-bottom:.4em;}
strong{color:var(--white);}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px;}
section{padding:56px 0;}
.section-tight{padding:36px 0;}
.eyebrow{
  display:inline-block;
  font-size:.78rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--cyan);
  background:rgba(51,214,224,.08);
  border:1px solid rgba(51,214,224,.28);
  padding:4px 12px;
  border-radius:999px;
  margin-bottom:14px;
}
.section-head{max-width:760px;margin-bottom:32px;}
.section-head h2{font-size:1.6rem;}
.section-head p{font-size:1.02rem;}
.divider{height:1px;background:linear-gradient(90deg,transparent,var(--line),transparent);border:0;margin:0;}

/* ---------- Skip link ---------- */
.skip-link{
  position:absolute;left:-999px;top:0;background:var(--cyan);color:var(--navy-950);
  padding:10px 16px;z-index:999;border-radius:0 0 8px 0;
}
.skip-link:focus{left:0;}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(6,11,22,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line-soft);
}
.header-inner{
  max-width:var(--maxw);margin:0 auto;padding:0 20px;
  display:flex;align-items:center;justify-content:space-between;height:66px;
}
.brand{display:flex;align-items:center;gap:10px;color:var(--white);}
.brand img{width:34px;height:34px;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text .cn{font-size:1.05rem;font-weight:700;color:var(--white);}
.brand-text .en{font-size:.66rem;letter-spacing:.08em;color:var(--white-mute);}
.brand:hover{text-decoration:none;}

.main-nav{display:flex;align-items:center;gap:2px;}
.main-nav a{
  color:var(--white-dim);font-size:.92rem;padding:9px 12px;border-radius:8px;white-space:nowrap;
}
.main-nav a:hover{color:var(--white);background:var(--navy-800);text-decoration:none;}
.main-nav a[aria-current="page"]{color:var(--cyan);background:rgba(51,214,224,.09);}

.nav-toggle{
  display:none;background:var(--navy-800);border:1px solid var(--line);color:var(--white);
  width:42px;height:38px;border-radius:8px;cursor:pointer;position:relative;
}
.nav-toggle span,.nav-toggle::before,.nav-toggle::after{
  content:"";position:absolute;left:9px;right:9px;height:2px;background:var(--white);
}
.nav-toggle::before{top:12px;}
.nav-toggle span{top:18px;}
.nav-toggle::after{top:24px;}

@media (max-width:1024px){
  .main-nav{
    position:fixed;inset:66px 0 0 0;background:var(--navy-950);
    flex-direction:column;align-items:stretch;gap:0;padding:14px 20px;
    transform:translateY(-8px);opacity:0;pointer-events:none;transition:opacity .18s ease,transform .18s ease;
    overflow-y:auto;border-top:1px solid var(--line-soft);
  }
  .main-nav.is-open{opacity:1;transform:translateY(0);pointer-events:auto;}
  .main-nav a{padding:14px 6px;border-bottom:1px solid var(--line-soft);font-size:1rem;}
  .nav-toggle{display:block;}
}

/* ---------- Hero ---------- */
.hero{padding:64px 0 40px;position:relative;}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;}
.hero h1{font-size:2.15rem;margin-bottom:.5em;}
.hero .lead{font-size:1.08rem;color:var(--white-dim);max-width:56ch;}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 6px;}
.hero-tags span{
  font-size:.78rem;color:var(--cyan);border:1px solid rgba(51,214,224,.3);
  padding:5px 10px;border-radius:999px;background:rgba(51,214,224,.06);
}
.hero-visual{background:var(--card-bg);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);}
@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr;}
  .hero h1{font-size:1.6rem;}
}

/* ---------- Breadcrumb ---------- */
.breadcrumb{padding:16px 0 0;font-size:.85rem;color:var(--white-mute);}
.breadcrumb a{color:var(--white-mute);}
.breadcrumb a:hover{color:var(--cyan);}
.breadcrumb .sep{margin:0 6px;color:var(--line);}

/* ---------- Cards / grids ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
@media (max-width:860px){.grid-3{grid-template-columns:1fr;}.grid-2{grid-template-columns:1fr;}}

.card{
  background:var(--card-bg);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;height:100%;
}
.summary-card{
  background:var(--card-bg-2);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:18px 20px;
}
.summary-card h4{font-size:1.02rem;margin-bottom:.5em;}
.summary-card h4 a{color:var(--white);}
.summary-card h4 a:hover{color:var(--cyan);}
.summary-card p{font-size:.92rem;margin-bottom:.7em;}
.summary-card .more{font-size:.84rem;}
.card-list-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:18px;flex-wrap:wrap;}
.card-list-head h3{font-size:1.25rem;margin:0;}
.card-list-head .view-all{font-size:.88rem;}

/* ---------- Article blocks ---------- */
.article-block{padding:52px 0;border-top:1px solid var(--line-soft);}
.article-block:first-of-type{border-top:0;}
.article-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:30px;height:30px;border-radius:50%;background:var(--navy-800);color:var(--cyan);
  font-size:.85rem;font-weight:700;border:1px solid var(--line);margin-bottom:14px;
}
.article-block h2{font-size:1.42rem;max-width:44ch;}
.article-meta{font-size:.82rem;color:var(--white-mute);margin-bottom:18px;}
.article-body{max-width:76ch;font-size:1.01rem;}
.article-body p{margin-bottom:1.05em;}
.article-body h3{font-size:1.08rem;margin-top:1.4em;color:var(--cyan);}
.callout{
  border-left:3px solid var(--cyan);background:rgba(51,214,224,.06);
  padding:14px 18px;border-radius:0 8px 8px 0;margin:1.2em 0;font-size:.95rem;color:var(--white-dim);
}
.callout strong{color:var(--white);}
.data-note{
  border-left:3px solid var(--amber);background:rgba(232,184,75,.07);
  padding:14px 18px;border-radius:0 8px 8px 0;margin:1.2em 0;font-size:.92rem;color:var(--white-dim);
}
.risk-note{
  border-left:3px solid var(--red);background:rgba(226,89,107,.07);
  padding:14px 18px;border-radius:0 8px 8px 0;margin:1.2em 0;font-size:.92rem;color:var(--white-dim);
}
.article-figure{margin:1.6em 0;background:var(--card-bg);border:1px solid var(--line);border-radius:var(--radius);padding:16px;}
.article-figure figcaption{font-size:.82rem;color:var(--white-mute);margin-top:10px;text-align:center;}

/* ---------- Tag chips reused as scope pills ---------- */
.pill-row{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 1.2em;}
.pill{font-size:.78rem;padding:4px 10px;border-radius:999px;border:1px solid var(--line);color:var(--white-mute);}
.pill.scope1{border-color:rgba(226,89,107,.4);color:var(--red);}
.pill.scope2{border-color:rgba(232,184,75,.4);color:var(--amber);}
.pill.scope3{border-color:rgba(51,214,224,.4);color:var(--cyan);}

/* ---------- Data table ---------- */
.data-table-wrap{overflow-x:auto;margin:1.4em 0;border:1px solid var(--line);border-radius:var(--radius-sm);}
table.data-table{width:100%;border-collapse:collapse;min-width:520px;font-size:.9rem;}
table.data-table th,table.data-table td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--line-soft);color:var(--white-dim);}
table.data-table th{background:var(--navy-850);color:var(--white);font-weight:600;font-size:.82rem;text-transform:uppercase;letter-spacing:.04em;}
table.data-table tr:last-child td{border-bottom:0;}

/* ---------- App feature grid ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
@media (max-width:900px){.feature-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:480px){.feature-grid{grid-template-columns:1fr;}}
.feature-item{background:var(--card-bg);border:1px solid var(--line);border-radius:var(--radius-sm);padding:18px;}
.feature-item .num{color:var(--cyan);font-size:.8rem;font-weight:700;letter-spacing:.06em;}
.feature-item h4{font-size:1rem;margin:.4em 0 .3em;}
.feature-item p{font-size:.86rem;margin:0;}

.download-panel{
  background:var(--card-bg);border:1px dashed var(--line);border-radius:var(--radius);
  padding:26px;text-align:center;
}
.download-panel .status{
  display:inline-block;font-size:.88rem;color:var(--amber);border:1px solid rgba(232,184,75,.35);
  background:rgba(232,184,75,.07);padding:8px 16px;border-radius:999px;
}

/* ---------- FAQ ---------- */
.faq-list{max-width:900px;}
.faq-item{border-bottom:1px solid var(--line-soft);}
.faq-item summary{
  cursor:pointer;list-style:none;padding:16px 4px;font-size:1rem;color:var(--white);
  display:flex;justify-content:space-between;align-items:center;gap:12px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";color:var(--cyan);font-size:1.3rem;flex:0 0 auto;transition:transform .15s ease;
}
.faq-item[open] summary::after{content:"–";}
.faq-item p{padding:0 4px 16px;font-size:.94rem;color:var(--white-dim);}

/* ---------- Company / statements ---------- */
.about-block{background:var(--card-bg);border:1px solid var(--line);border-radius:var(--radius);padding:30px;}
.statement{font-size:.84rem;color:var(--white-mute);border-top:1px solid var(--line-soft);padding-top:18px;margin-top:18px;}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy-900);border-top:1px solid var(--line-soft);padding:44px 0 26px;margin-top:40px;}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:32px;}
@media (max-width:800px){.footer-grid{grid-template-columns:1fr;gap:24px;}}
.footer-brand .brand-text .cn{font-size:1.15rem;}
.footer-brand p{font-size:.86rem;margin-top:10px;}
.footer-col h5{color:var(--white);font-size:.86rem;letter-spacing:.06em;text-transform:uppercase;margin-bottom:12px;}
.footer-col ul{list-style:none;padding:0;margin:0;}
.footer-col li{margin-bottom:8px;}
.footer-col a{color:var(--white-dim);font-size:.92rem;}
.footer-col a:hover{color:var(--cyan);}
.footer-bottom{
  border-top:1px solid var(--line-soft);margin-top:32px;padding-top:18px;
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;font-size:.8rem;color:var(--white-mute);
}

/* ---------- Back to top ---------- */
.back-to-top{
  position:fixed;right:18px;bottom:18px;width:44px;height:44px;border-radius:50%;
  background:var(--navy-800);border:1px solid var(--line);color:var(--cyan);font-size:1.1rem;
  display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;pointer-events:none;
  transition:opacity .2s ease,transform .2s ease;z-index:90;
}
.back-to-top.is-visible{opacity:1;pointer-events:auto;}
.back-to-top:hover{transform:translateY(-3px);}

/* ---------- Tabs (data flow switcher) ---------- */
.tabbar{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px;}
.tabbar button{
  background:var(--navy-850);border:1px solid var(--line);color:var(--white-dim);
  padding:8px 14px;border-radius:999px;font-size:.86rem;cursor:pointer;
}
.tabbar button[aria-selected="true"]{background:rgba(51,214,224,.12);border-color:var(--cyan);color:var(--cyan);}
.tabpanel{display:none;}
.tabpanel.is-active{display:block;}

/* ---------- CTA strip ---------- */
.cta-strip{
  background:linear-gradient(135deg,var(--navy-850),var(--navy-800));
  border:1px solid var(--line);border-radius:var(--radius);padding:30px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
}
.cta-strip h3{margin:0 0 4px;font-size:1.15rem;}
.cta-strip p{margin:0;font-size:.92rem;}
.btn{
  display:inline-block;background:var(--cyan);color:var(--navy-950);font-weight:700;
  padding:11px 22px;border-radius:8px;font-size:.92rem;white-space:nowrap;
}
.btn:hover{text-decoration:none;background:#4ee3ec;}
.btn-outline{
  display:inline-block;border:1px solid var(--line);color:var(--white);
  padding:10px 20px;border-radius:8px;font-size:.92rem;
}
.btn-outline:hover{border-color:var(--cyan);color:var(--cyan);text-decoration:none;}

/* ---------- Utility ---------- */
.mt-0{margin-top:0;}
.text-mute{color:var(--white-mute);}
.small{font-size:.85rem;}
.center{text-align:center;}

/* ---------- Responsive base tweaks ---------- */
@media (max-width:600px){
  section{padding:40px 0;}
  .hero{padding:40px 0 28px;}
  .hero h1{font-size:1.42rem;}
  .article-block{padding:38px 0;}
  .article-block h2{font-size:1.2rem;}
  .about-block{padding:20px;}
  .cta-strip{flex-direction:column;align-items:flex-start;}
}
@media (max-width:390px){
  .container{padding:0 14px;}
  .hero h1{font-size:1.28rem;}
}