/* 壹号国际官网 - style.css
   原创静态站点样式表。仅使用系统字体与本地资源，不依赖任何远程 CDN。 */

:root{
  --color-bg:#FAF8F3;
  --color-bg-alt:#F1ECE0;
  --color-bg-deep:#0D2440;
  --color-primary:#123A66;
  --color-primary-dark:#0B2647;
  --color-primary-light:#E7EEF6;
  --color-accent:#1B9AB8;
  --color-accent-light:#E4F4F7;
  --color-knowledge:#1E8F5F;
  --color-knowledge-light:#E7F5EE;
  --color-alert:#DD8A34;
  --color-alert-light:#FBEEDD;
  --color-graphite:#363B42;
  --color-text:#23262B;
  --color-text-muted:#5B616B;
  --color-text-soft:#7A808A;
  --color-border:#E3DDCE;
  --color-border-soft:#ECE7DA;
  --color-card:#FFFFFF;
  --radius-sm:6px;
  --radius-md:12px;
  --radius-lg:20px;
  --shadow-card:0 2px 14px rgba(18,58,102,0.08);
  --shadow-card-hover:0 6px 24px rgba(18,58,102,0.14);
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --max-width:1180px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  background:var(--color-bg);
  color:var(--color-text);
  line-height:1.75;
  font-size:16px;
  overflow-x:hidden;
}
img,svg{max-width:100%;height:auto;display:block;}
a{color:var(--color-primary);text-decoration:none;}
a:hover{text-decoration:underline;}
ul,ol{padding-left:1.3em;}
h1,h2,h3,h4{line-height:1.35;margin:0 0 .6em;color:var(--color-graphite);font-weight:700;}
p{margin:0 0 1em;}
table{border-collapse:collapse;width:100%;}
.container{max-width:var(--max-width);margin:0 auto;padding:0 20px;}

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

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(250,248,243,0.96);
  border-bottom:1px solid var(--color-border);
  backdrop-filter:saturate(160%) blur(6px);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;max-width:var(--max-width);margin:0 auto;gap:16px;}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.15rem;color:var(--color-primary-dark);}
.brand img{width:36px;height:36px;}
.brand small{display:block;font-weight:400;font-size:.68rem;color:var(--color-text-soft);letter-spacing:.02em;}
.site-nav{display:flex;align-items:center;gap:6px;}
.site-nav a{
  padding:9px 14px;border-radius:999px;color:var(--color-graphite);font-size:.95rem;font-weight:500;white-space:nowrap;
}
.site-nav a:hover,.site-nav a.is-active{background:var(--color-primary-light);color:var(--color-primary-dark);text-decoration:none;}
.nav-toggle{
  display:none;border:1px solid var(--color-border);background:#fff;border-radius:8px;padding:8px 10px;cursor:pointer;
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--color-graphite);margin:4px 0;}

@media (max-width:900px){
  .site-nav{
    position:fixed;inset:60px 0 auto 0;background:var(--color-bg);
    flex-direction:column;align-items:stretch;gap:0;
    border-bottom:1px solid var(--color-border);
    max-height:0;overflow:hidden;transition:max-height .25s ease;
    box-shadow:0 8px 20px rgba(0,0,0,.08);
  }
  .site-nav.is-open{max-height:520px;}
  .site-nav a{padding:14px 20px;border-radius:0;border-bottom:1px solid var(--color-border-soft);}
  .nav-toggle{display:block;}
}

/* ---------- Hero ---------- */
.hero{
  background:linear-gradient(155deg,var(--color-primary-dark) 0%,var(--color-primary) 62%,#164C77 100%);
  color:#fff;padding:56px 0 60px;
}
.hero-inner{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;}
.hero-eyebrow{display:inline-block;font-size:.82rem;letter-spacing:.04em;background:rgba(255,255,255,.14);padding:5px 12px;border-radius:999px;margin-bottom:16px;}
.hero h1{color:#fff;font-size:clamp(1.5rem,3.4vw,2.35rem);margin-bottom:.5em;}
.hero p{color:rgba(255,255,255,.86);font-size:1.05rem;max-width:640px;}
.hero-visual{background:rgba(255,255,255,.06);border-radius:var(--radius-lg);padding:18px;border:1px solid rgba(255,255,255,.16);}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px;}
@media (max-width:860px){.hero-inner{grid-template-columns:1fr;}}

.btn{
  display:inline-flex;align-items:center;gap:8px;padding:11px 20px;border-radius:999px;
  font-weight:600;font-size:.95rem;border:1px solid transparent;cursor:pointer;
}
.btn-primary{background:var(--color-accent);color:#fff;}
.btn-primary:hover{background:#178196;text-decoration:none;}
.btn-outline{background:transparent;color:#fff;border-color:rgba(255,255,255,.5);}
.btn-outline:hover{background:rgba(255,255,255,.12);text-decoration:none;}
.btn-outline-dark{background:transparent;color:var(--color-primary);border-color:var(--color-primary);}
.btn-outline-dark:hover{background:var(--color-primary-light);text-decoration:none;}

/* ---------- Breadcrumb ---------- */
.breadcrumb{font-size:.85rem;color:var(--color-text-soft);padding:14px 0;}
.breadcrumb a{color:var(--color-text-soft);}
.breadcrumb span{margin:0 6px;}

/* ---------- Section ---------- */
.section{padding:52px 0;}
.section-alt{background:var(--color-bg-alt);}
.section-header{max-width:760px;margin:0 auto 32px;text-align:center;}
.section-tag{display:inline-block;font-size:.78rem;font-weight:700;color:var(--color-accent);letter-spacing:.06em;text-transform:uppercase;margin-bottom:8px;}
.section-title{font-size:clamp(1.3rem,2.6vw,1.8rem);}
.section-lead{color:var(--color-text-muted);font-size:1rem;}

/* ---------- Chain diagram ---------- */
.chain-visual-wrap{background:#fff;border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:20px;box-shadow:var(--shadow-card);}
.chain-caption{text-align:center;color:var(--color-text-soft);font-size:.88rem;margin-top:10px;}

/* ---------- Flagship articles (homepage) ---------- */
.flagship-list{display:flex;flex-direction:column;gap:26px;}
.flagship-article{
  background:var(--color-card);border:1px solid var(--color-border);border-radius:var(--radius-lg);
  padding:28px;box-shadow:var(--shadow-card);
}
.flagship-grid{display:grid;grid-template-columns:.9fr 1.5fr;gap:26px;align-items:start;}
.flagship-visual{background:var(--color-bg-alt);border-radius:var(--radius-md);padding:14px;}
.flagship-meta{display:flex;gap:10px;align-items:center;font-size:.82rem;color:var(--color-text-soft);margin-bottom:10px;flex-wrap:wrap;}
.flagship-meta .tag{background:var(--color-accent-light);color:var(--color-accent);padding:3px 10px;border-radius:999px;font-weight:600;}
.flagship-article h3{font-size:1.28rem;margin-bottom:.5em;}
.flagship-summary{color:var(--color-text);}
.flagship-more{
  max-height:0;overflow:hidden;transition:max-height .35s ease;
}
.flagship-more.is-open{max-height:6000px;}
.flagship-more-inner{padding-top:6px;border-top:1px dashed var(--color-border);margin-top:14px;}
.flagship-more-inner h4{font-size:1.02rem;margin-top:1.2em;}
.flagship-more-inner table{margin:1em 0;font-size:.92rem;}
.flagship-more-inner th,.flagship-more-inner td{border:1px solid var(--color-border);padding:8px 10px;text-align:left;}
.flagship-more-inner th{background:var(--color-bg-alt);}
.read-more-btn{
  margin-top:14px;background:none;border:1px solid var(--color-primary);color:var(--color-primary);
  padding:8px 16px;border-radius:999px;font-size:.88rem;font-weight:600;cursor:pointer;
}
.read-more-btn:hover{background:var(--color-primary-light);}
.flagship-link{margin-top:14px;font-size:.9rem;}
@media (max-width:820px){.flagship-grid{grid-template-columns:1fr;}}

/* ---------- Observation cards ---------- */
.observation-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.observation-card{background:var(--color-card);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:22px;box-shadow:var(--shadow-card);}
.observation-card h3{font-size:1.05rem;}
.observation-card p{color:var(--color-text-muted);font-size:.94rem;}
@media (max-width:900px){.observation-grid{grid-template-columns:1fr;}}

/* ---------- Article grid (secondary roundups) ---------- */
.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.article-grid.cols-2{grid-template-columns:repeat(2,1fr);}
.article-card{background:var(--color-card);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:20px;box-shadow:var(--shadow-card);display:flex;flex-direction:column;}
.article-card:hover{box-shadow:var(--shadow-card-hover);}
.article-card .cat{font-size:.76rem;font-weight:700;color:var(--color-accent);text-transform:uppercase;letter-spacing:.04em;margin-bottom:6px;}
.article-card h3{font-size:1.02rem;margin-bottom:.5em;}
.article-card p{color:var(--color-text-muted);font-size:.92rem;flex:1;}
.article-card .more-link{font-size:.88rem;font-weight:600;margin-top:10px;}
@media (max-width:900px){.article-grid,.article-grid.cols-2{grid-template-columns:1fr;}}

/* ---------- Full article (secondary pages) ---------- */
.article-full{background:var(--color-card);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:30px;box-shadow:var(--shadow-card);margin-bottom:28px;}
.article-full-meta{font-size:.84rem;color:var(--color-text-soft);margin-bottom:6px;}
.article-full h2{font-size:1.35rem;}
.article-full-body h3{font-size:1.08rem;margin-top:1.3em;}
.article-full-body table{margin:1em 0;font-size:.93rem;}
.article-full-body th,.article-full-body td{border:1px solid var(--color-border);padding:9px 11px;text-align:left;vertical-align:top;}
.article-full-body th{background:var(--color-bg-alt);}
.article-full-body ul,.article-full-body ol{margin:0 0 1em;}

/* ---------- Chip / focus tag ---------- */
.focus-chip{display:inline-block;background:var(--color-knowledge-light);color:var(--color-knowledge);font-size:.78rem;font-weight:700;padding:3px 10px;border-radius:999px;margin-left:8px;}

/* ---------- FAQ ---------- */
.faq-list{max-width:840px;margin:0 auto;}
.faq-item{border-bottom:1px solid var(--color-border);}
.faq-question{
  width:100%;text-align:left;background:none;border:none;cursor:pointer;
  padding:16px 4px;font-size:1rem;font-weight:600;color:var(--color-graphite);
  display:flex;justify-content:space-between;align-items:center;gap:12px;
}
.faq-question .icon{flex:none;width:20px;height:20px;position:relative;}
.faq-question .icon::before,.faq-question .icon::after{content:"";position:absolute;background:var(--color-primary);border-radius:2px;}
.faq-question .icon::before{width:14px;height:2px;top:9px;left:3px;}
.faq-question .icon::after{width:2px;height:14px;left:9px;top:3px;transition:transform .2s ease;}
.faq-question[aria-expanded="true"] .icon::after{transform:scaleY(0);}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .3s ease;color:var(--color-text-muted);}
.faq-answer p{padding:0 4px 16px;margin:0;}
.faq-answer.is-open{max-height:600px;}

/* ---------- Tabs / interactive demos ---------- */
.demo-box{background:var(--color-card);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:22px;box-shadow:var(--shadow-card);}
.demo-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px;}
.demo-tab-btn{
  background:var(--color-bg-alt);border:1px solid var(--color-border);color:var(--color-graphite);
  padding:8px 14px;border-radius:999px;font-size:.88rem;font-weight:600;cursor:pointer;
}
.demo-tab-btn.is-active{background:var(--color-primary);border-color:var(--color-primary);color:#fff;}
.demo-tab-panel{display:none;}
.demo-tab-panel.is-active{display:block;}
.demo-tab-panel table{font-size:.9rem;}
.demo-tab-panel th,.demo-tab-panel td{border:1px solid var(--color-border);padding:8px 10px;text-align:left;}
.demo-tab-panel th{background:var(--color-bg-alt);}
.demo-note{font-size:.85rem;color:var(--color-text-soft);margin-top:10px;}

.state-pill{display:inline-flex;align-items:center;gap:6px;font-size:.82rem;font-weight:700;padding:4px 12px;border-radius:999px;}
.state-suggested{background:var(--color-accent-light);color:var(--color-accent);}
.state-pending{background:var(--color-alert-light);color:var(--color-alert);}
.state-executed{background:var(--color-knowledge-light);color:var(--color-knowledge);}
.state-failed{background:#FBE7E4;color:#B3402A;}

/* ---------- Timeline ---------- */
.timeline{list-style:none;padding:0;margin:0;border-left:2px solid var(--color-border);}
.timeline li{position:relative;padding:0 0 22px 24px;}
.timeline li::before{content:"";position:absolute;left:-7px;top:2px;width:12px;height:12px;border-radius:50%;background:var(--color-accent);border:2px solid #fff;box-shadow:0 0 0 2px var(--color-accent);}
.timeline .t-time{font-size:.8rem;color:var(--color-text-soft);}
.timeline .t-title{font-weight:700;color:var(--color-graphite);}

/* ---------- Company / about ---------- */
.about-grid{display:grid;grid-template-columns:1.3fr .7fr;gap:32px;align-items:start;}
.about-fact-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px;}
.about-fact-list li{background:var(--color-card);border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:12px 14px;font-size:.92rem;}
.about-fact-list b{color:var(--color-primary);}
@media (max-width:860px){.about-grid{grid-template-columns:1fr;}}

.note-box{
  background:var(--color-bg-alt);border:1px solid var(--color-border);border-radius:var(--radius-md);
  padding:16px 18px;font-size:.88rem;color:var(--color-text-muted);
}

/* ---------- App feature grid ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.feature-item{background:var(--color-card);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:18px;text-align:center;}
.feature-item img{width:44px;height:44px;margin:0 auto 10px;}
.feature-item h3{font-size:.95rem;}
.feature-item p{font-size:.82rem;color:var(--color-text-soft);margin:0;}
@media (max-width:900px){.feature-grid{grid-template-columns:repeat(2,1fr);}}

/* ---------- App download entries ---------- */
.download-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.download-card{background:var(--color-card);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:20px;text-align:center;}
.download-card img{width:52px;height:52px;margin:0 auto 12px;}
@media (max-width:860px){.download-grid{grid-template-columns:1fr;}}

/* ---------- Permission / priority tables reused ---------- */
.matrix-table{width:100%;font-size:.92rem;}
.matrix-table th,.matrix-table td{border:1px solid var(--color-border);padding:10px 12px;text-align:left;}
.matrix-table th{background:var(--color-primary);color:#fff;}
.matrix-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:var(--radius-sm);}

/* ---------- Footer ---------- */
.site-footer{background:var(--color-primary-dark);color:rgba(255,255,255,.82);padding:48px 0 20px;margin-top:40px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px;}
.footer-col h4{color:#fff;font-size:.95rem;margin-bottom:14px;}
.footer-col ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px;}
.footer-col a{color:rgba(255,255,255,.75);font-size:.9rem;}
.footer-col a:hover{color:#fff;}
.footer-disclaimer{font-size:.8rem;color:rgba(255,255,255,.55);margin-top:30px;padding-top:20px;border-top:1px solid rgba(255,255,255,.14);line-height:1.7;}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:.8rem;color:rgba(255,255,255,.55);margin-top:16px;}
.icp-slot{color:rgba(255,255,255,.4);}
@media (max-width:860px){.footer-grid{grid-template-columns:1fr 1fr;}}
@media (max-width:520px){.footer-grid{grid-template-columns:1fr;}}

/* ---------- Back to top ---------- */
.back-to-top{
  position:fixed;right:18px;bottom:18px;width:44px;height:44px;border-radius:50%;
  background:var(--color-primary);color:#fff;border:none;cursor:pointer;display:none;
  align-items:center;justify-content:center;box-shadow:0 4px 14px rgba(0,0,0,.22);z-index:90;
}
.back-to-top.is-visible{display:flex;}

/* ---------- Utility ---------- */
.text-center{text-align:center;}
.mt-0{margin-top:0;}
.small-note{font-size:.82rem;color:var(--color-text-soft);}
.divider{height:1px;background:var(--color-border);margin:40px 0;}
.pill-list{display:flex;flex-wrap:wrap;gap:8px;}
.pill-list span{background:var(--color-bg-alt);border:1px solid var(--color-border);padding:5px 12px;border-radius:999px;font-size:.82rem;color:var(--color-text-muted);}

@media (max-width:600px){
  .section{padding:38px 0;}
  .flagship-article{padding:20px;}
  .article-full{padding:20px;}
  .hero{padding:40px 0 46px;}
}