/* 星际娱乐官网 - 共享样式系统
   Green Entertainment Studio / Climate Story Lab / Public Impact Media */

:root{
  --navy:#0b2233;
  --navy-2:#123049;
  --forest:#1f5e46;
  --forest-2:#164a37;
  --mint:#5fd6b0;
  --mint-soft:#e4f7ef;
  --off-white:#f6f8f6;
  --gray-100:#eef1ef;
  --gray-200:#dde3e0;
  --gray-400:#8b9b95;
  --gray-600:#5a6b65;
  --ink:#132420;
  --warm:#e8b355;
  --warm-soft:#fbf0d9;
  --white:#ffffff;
  --danger:#c0563f;
  --radius:14px;
  --radius-sm:8px;
  --maxw:1180px;
  --shadow:0 6px 24px rgba(11,34,51,.08);
  --shadow-lg:0 12px 40px rgba(11,34,51,.14);
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  color:var(--ink);
  background:var(--off-white);
  line-height:1.75;
  font-size:16px;
  overflow-x:hidden;
}
img,svg{max-width:100%;display:block;}
a{color:var(--forest);text-decoration:none;}
a:hover{text-decoration:underline;}
h1,h2,h3,h4{line-height:1.35;margin:0 0 .6em;color:var(--navy);font-weight:700;}
p{margin:0 0 1em;}
ul,ol{margin:0 0 1em;padding-left:1.4em;}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px;}
.section{padding:56px 0;}
.section-tight{padding:32px 0;}
.section-alt{background:var(--white);}
.section-navy{background:var(--navy);color:var(--gray-100);}
.section-navy h1,.section-navy h2,.section-navy h3{color:var(--white);}
.section-mint{background:var(--mint-soft);}

/* ---------- Skip link ---------- */
.skip-link{position:absolute;left:-999px;top:0;background:var(--navy);color:var(--white);padding:8px 14px;z-index:200;}
.skip-link:focus{left:8px;top:8px;}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(11,34,51,.97);
  backdrop-filter:blur(6px);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.nav-wrap{
  max-width:var(--maxw);margin:0 auto;padding:0 20px;
  display:flex;align-items:center;justify-content:space-between;height:64px;
}
.brand{display:flex;align-items:center;gap:10px;color:var(--white);font-weight:700;font-size:18px;}
.brand img{width:32px;height:32px;}
.brand small{display:block;font-size:11px;font-weight:400;color:var(--mint);letter-spacing:.04em;}
.nav-toggle{
  display:none;background:none;border:1px solid rgba(255,255,255,.3);border-radius:8px;
  width:40px;height:40px;color:var(--white);font-size:20px;cursor:pointer;
}
.nav-list{display:flex;align-items:center;gap:4px;flex-wrap:wrap;}
.nav-list a{
  color:var(--gray-100);font-size:14.5px;padding:8px 12px;border-radius:8px;white-space:nowrap;
}
.nav-list a:hover,.nav-list a.active{background:rgba(95,214,176,.16);color:var(--mint);text-decoration:none;}

@media (max-width:1024px){
  .nav-toggle{display:block;}
  .nav-list{
    position:fixed;top:64px;left:0;right:0;bottom:0;
    background:var(--navy);flex-direction:column;align-items:stretch;
    padding:14px;gap:2px;display:none;overflow-y:auto;
  }
  .nav-list.open{display:flex;}
  .nav-list a{padding:12px 14px;font-size:16px;}
}

/* ---------- Hero ---------- */
.hero{
  background:linear-gradient(160deg,var(--navy) 0%,var(--navy-2) 55%,var(--forest-2) 100%);
  color:var(--gray-100);padding:56px 0 48px;position:relative;overflow:hidden;
}
.hero h1{color:var(--white);font-size:30px;max-width:820px;}
.hero .lead{font-size:19px;color:var(--mint);font-weight:600;margin-bottom:.5em;}
.hero .sub{font-size:16px;color:var(--gray-100);max-width:760px;opacity:.92;}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:36px;align-items:center;}
@media (max-width:900px){.hero-grid{grid-template-columns:1fr;}}
.hero-figure{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);padding:16px;}
.hero-figure figcaption{font-size:12px;color:var(--gray-400);text-align:center;margin-top:8px;}
.crumbs{font-size:13px;color:var(--gray-400);margin-bottom:14px;}
.crumbs a{color:var(--gray-400);}
.crumbs a:hover{color:var(--mint);}

/* ---------- Page header for subpages ---------- */
.page-head{
  background:linear-gradient(160deg,var(--navy) 0%,var(--forest-2) 100%);
  color:var(--white);padding:40px 0 34px;
}
.page-head h1{color:var(--white);font-size:26px;max-width:760px;}
.page-head .sub{color:var(--mint-soft);opacity:.9;max-width:720px;}

/* ---------- Tag chips ---------- */
.tags{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0;}
.tag{
  font-size:12.5px;padding:5px 11px;border-radius:999px;
  background:rgba(95,214,176,.14);color:var(--mint);border:1px solid rgba(95,214,176,.35);
}
.section-alt .tag,.section-mint .tag{background:var(--gray-100);color:var(--forest-2);border-color:var(--gray-200);}

/* ---------- Buttons ---------- */
.btn{
  display:inline-block;padding:11px 20px;border-radius:999px;font-weight:600;font-size:14.5px;
  background:var(--mint);color:var(--navy);border:none;cursor:pointer;
}
.btn:hover{background:#4cc39d;text-decoration:none;}
.btn-outline{background:transparent;color:var(--white);border:1px solid rgba(255,255,255,.5);}
.btn-outline:hover{background:rgba(255,255,255,.1);}
.btn-ghost{background:var(--gray-100);color:var(--navy);}

/* ---------- Article blocks (long-form SEO copy) ---------- */
.article{
  background:var(--white);border:1px solid var(--gray-200);border-radius:var(--radius);
  padding:28px 28px 8px;margin-bottom:26px;box-shadow:var(--shadow);
}
.article .eyebrow{font-size:13px;color:var(--forest);font-weight:700;letter-spacing:.02em;text-transform:uppercase;}
.article h2{font-size:22px;margin-top:.2em;}
.article h3{font-size:17px;color:var(--forest-2);}
.article p{color:var(--ink);}
.article .note{
  font-size:13.5px;color:var(--gray-600);background:var(--gray-100);border-left:3px solid var(--warm);
  padding:8px 12px;border-radius:6px;margin:14px 0;
}
.article .link-out{font-size:14.5px;font-weight:600;margin:16px 0 6px;padding-top:10px;border-top:1px dashed var(--gray-200);}

/* ---------- Card grid for回流摘要 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
@media (max-width:900px){.card-grid{grid-template-columns:1fr;}}
.card{
  background:var(--white);border:1px solid var(--gray-200);border-radius:var(--radius);
  padding:20px;box-shadow:var(--shadow);
}
.card h3{font-size:16.5px;margin-bottom:.5em;}
.card p{font-size:14.5px;color:var(--gray-600);margin-bottom:.7em;}
.card a.more{font-size:13.5px;font-weight:700;}

/* ---------- FAQ ---------- */
.faq-item{border-bottom:1px solid var(--gray-200);}
.faq-q{
  width:100%;text-align:left;background:none;border:none;padding:16px 4px;
  font-size:15.5px;font-weight:600;color:var(--navy);cursor:pointer;
  display:flex;justify-content:space-between;align-items:center;gap:12px;
}
.faq-q .ico{font-size:18px;color:var(--forest);flex-shrink:0;transition:transform .2s;}
.faq-item.open .ico{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;font-size:14.5px;color:var(--gray-600);}
.faq-item.open .faq-a{max-height:600px;}
.faq-a p{padding:0 4px 16px;margin:0;}

/* ---------- Tabs (storyboard / scenario / app) ---------- */
.tabs-bar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px;}
.tab-btn{
  padding:9px 16px;border-radius:999px;border:1px solid var(--gray-200);background:var(--white);
  font-size:14px;font-weight:600;color:var(--gray-600);cursor:pointer;
}
.tab-btn.active{background:var(--forest);color:var(--white);border-color:var(--forest);}
.tab-panel{display:none;}
.tab-panel.active{display:block;}
.tab-panel-box{background:var(--white);border:1px solid var(--gray-200);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);}

/* ---------- Diagram wrapper ---------- */
.diagram{background:var(--white);border:1px solid var(--gray-200);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);overflow-x:auto;}
.diagram figcaption{font-size:12.5px;color:var(--gray-600);margin-top:10px;text-align:center;}

/* ---------- Table (scroll on mobile) ---------- */
.table-scroll{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--gray-200);}
table{width:100%;border-collapse:collapse;min-width:560px;background:var(--white);}
th,td{padding:10px 14px;text-align:left;font-size:14px;border-bottom:1px solid var(--gray-200);}
th{background:var(--gray-100);color:var(--navy);}

/* ---------- Badges for fact/scenario/fiction annotation ---------- */
.badge{display:inline-block;font-size:12px;font-weight:700;padding:3px 9px;border-radius:6px;margin-right:6px;}
.badge-fact{background:#dff2ea;color:var(--forest-2);}
.badge-scenario{background:var(--warm-soft);color:#8a6115;}
.badge-fiction{background:#eee6f7;color:#5b3d8a;}
.badge-sim{background:var(--gray-100);color:var(--gray-600);}

/* ---------- Concept dashboard (app / model) ---------- */
.dash-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;}
@media (max-width:760px){.dash-grid{grid-template-columns:1fr 1fr;}}
@media (max-width:460px){.dash-grid{grid-template-columns:1fr;}}
.dash-cell{background:var(--navy);border-radius:12px;padding:16px;color:var(--gray-100);}
.dash-cell .k{font-size:11.5px;color:var(--mint);letter-spacing:.05em;text-transform:uppercase;}
.dash-cell .v{font-size:16px;font-weight:700;color:var(--white);margin-top:4px;}
.dash-cell .d{font-size:12px;color:var(--gray-400);margin-top:2px;}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy);color:var(--gray-400);padding:44px 0 24px;font-size:14px;}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:26px;}
@media (max-width:800px){.footer-grid{grid-template-columns:1fr 1fr;}}
@media (max-width:480px){.footer-grid{grid-template-columns:1fr;}}
.footer-grid h4{color:var(--white);font-size:14px;margin-bottom:10px;}
.footer-grid a{color:var(--gray-400);display:block;padding:4px 0;font-size:13.5px;}
.footer-grid a:hover{color:var(--mint);}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);margin-top:30px;padding-top:18px;font-size:12.5px;color:var(--gray-600);}
.footer-brand{display:flex;align-items:center;gap:10px;color:var(--white);font-weight:700;margin-bottom:8px;}
.footer-brand img{width:26px;height:26px;}

/* ---------- Back to top ---------- */
.back-top{
  position:fixed;right:18px;bottom:18px;width:44px;height:44px;border-radius:50%;
  background:var(--forest);color:var(--white);border:none;font-size:18px;cursor:pointer;
  box-shadow:var(--shadow-lg);display:none;z-index:90;
}
.back-top.show{display:block;}

/* ---------- Misc utility ---------- */
.muted{color:var(--gray-600);}
.center{text-align:center;}
.mt-0{margin-top:0;}
.small{font-size:13px;}
.divider{height:1px;background:var(--gray-200);margin:34px 0;}
.section-title{font-size:24px;margin-bottom:6px;}
.section-kicker{font-size:13px;color:var(--forest);font-weight:700;text-transform:uppercase;letter-spacing:.03em;margin-bottom:6px;}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:22px;}
@media (max-width:800px){.two-col{grid-template-columns:1fr;}}
.pill-list{display:flex;flex-wrap:wrap;gap:10px;list-style:none;padding:0;}
.pill-list li{background:var(--white);border:1px solid var(--gray-200);border-radius:10px;padding:10px 14px;font-size:14px;box-shadow:var(--shadow);}
.warn-box{background:#fdf1ec;border:1px solid #f0c8b6;color:#8a3d24;border-radius:10px;padding:14px 16px;font-size:14px;margin:16px 0;}
.ok-box{background:var(--mint-soft);border:1px solid #bfe9d8;color:var(--forest-2);border-radius:10px;padding:14px 16px;font-size:14px;margin:16px 0;}