/* HETRA - 恒创工程技术研究协会 */
:root{
  --primary:#1a3c5e;
  --primary-light:#2c5a84;
  --primary-dark:#0d2238;
  --accent:#3498b4;
  --accent-light:#5bc0de;
  --gradient:linear-gradient(135deg,#1a3c5e 0%,#3498b4 100%);
  --gradient-light:linear-gradient(135deg,#2c5a84 0%,#5bc0de 100%);
  --text:#1a1a2e;
  --text-light:#555;
  --muted:#888;
  --bg:#ffffff;
  --bg-alt:#f5f7fa;
  --bg-dark:#0f0a1f;
  --border:#e5e7eb;
  --shadow:0 10px 40px rgba(45,24,84,0.08);
  --shadow-lg:0 20px 60px rgba(45,24,84,0.15);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:'PingFang SC','Microsoft YaHei','Source Han Sans SC','Inter','Montserrat',sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
html.en body{font-family:'Inter','Helvetica Neue',Arial,sans-serif}
a{color:inherit;text-decoration:none;transition:color .3s}
img{max-width:100%;display:block}
.container{max-width:1280px;margin:0 auto;padding:0 24px}

/* ===== LANGUAGE ===== */
.lang-en{display:none !important}
html.en .lang-zh{display:none !important}
html.en .lang-en.lang-block,
html.en div.lang-en,
html.en p.lang-en,
html.en li.lang-en,
html.en h1.lang-en,
html.en h2.lang-en,
html.en h3.lang-en,
html.en h4.lang-en,
html.en h5.lang-en,
html.en h6.lang-en,
html.en section.lang-en,
html.en article.lang-en{display:block !important}
html.en tr.lang-en{display:table-row !important}
html.en td.lang-en,
html.en th.lang-en{display:table-cell !important}
html.en .lang-en.lang-flex{display:flex !important}
html.en span.lang-en,
html.en a.lang-en,
html.en strong.lang-en,
html.en em.lang-en,
html.en i.lang-en,
html.en label.lang-en,
html.en button.lang-en,
html.en small.lang-en{display:inline !important}

/* ===== NAVBAR ===== */
.navbar{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  height:64px;
  background:#ffffff;
  box-shadow:0 2px 12px rgba(45,24,84,0.08);
  border-bottom:1px solid rgba(45,24,84,0.08);
  transition:background .3s,box-shadow .3s;
}
.navbar.scrolled{
  background:#ffffff;
  backdrop-filter:blur(12px);
  box-shadow:0 4px 20px rgba(45,24,84,0.12);
}
.navbar.solid{
  background:#ffffff;
}
.nav-inner{
  height:64px;display:flex;align-items:center;justify-content:space-between;
  max-width:1440px;margin:0 auto;padding:0 32px;
}
.nav-logo{display:flex;align-items:center;gap:10px;color:var(--primary);font-weight:700;font-size:16px}
.nav-logo img{height:36px;width:auto}
.nav-logo span{line-height:1.2}
.nav-logo small{display:block;font-size:10px;opacity:.85;font-weight:400;letter-spacing:1px;color:var(--text-light)}
.nav-menu{display:flex;align-items:center;gap:4px;list-style:none}
.nav-menu>li{position:relative}
.nav-menu>li>a{
  color:var(--text);padding:22px 16px;display:block;font-size:14px;font-weight:500;
  transition:color .3s;
}
.nav-menu>li>a:hover{color:var(--accent)}
.nav-menu .dropdown{
  position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(10px);
  background:#fff;min-width:200px;border-radius:8px;
  box-shadow:0 20px 40px rgba(0,0,0,0.2);
  padding:8px 0;opacity:0;visibility:hidden;transition:all .3s;
  list-style:none;
}
.nav-menu>li:hover .dropdown{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.dropdown li a{
  display:block;padding:10px 20px;color:var(--text);font-size:13px;
  border-left:3px solid transparent;transition:all .2s;
}
.dropdown li a:hover{background:var(--bg-alt);color:var(--primary);border-left-color:var(--accent)}
.nav-search{
  color:var(--primary);background:none;border:1px solid rgba(45,24,84,.2);
  width:38px;height:38px;border-radius:50%;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  transition:all .3s;
}
.nav-search:hover{background:var(--accent);border-color:var(--accent)}
.nav-search:hover svg{fill:#fff}
.nav-search svg{width:16px;height:16px;fill:var(--primary);transition:fill .3s}
.nav-actions{display:flex;align-items:center;gap:8px}
.lang-toggle-btn{
  width:38px;height:38px;border-radius:50%;border:1px solid rgba(45,24,84,.2);
  background:#fff;color:var(--primary);font-size:12px;font-weight:700;cursor:pointer;
  display:flex;align-items:center;justify-content:center;transition:all .3s;
}
.lang-toggle-btn:hover{background:var(--accent);border-color:var(--accent);color:#fff}
.search-box{
  position:fixed;top:64px;left:0;right:0;background:#fff;
  padding:20px;display:none;box-shadow:0 10px 30px rgba(45,24,84,.12);
  border-bottom:1px solid var(--border);
}
.search-box.active{display:block}
.search-box input{
  width:100%;max-width:600px;margin:0 auto;display:block;
  background:var(--bg-alt);border:1px solid var(--border);
  color:var(--text);padding:14px 20px;border-radius:30px;font-size:15px;
}
.search-box input::placeholder{color:var(--muted)}

/* ===== HERO ===== */
.hero{
  position:relative;min-height:100vh;
  display:flex;align-items:center;justify-content:center;
  color:#fff;text-align:center;overflow:hidden;
  background:var(--primary-dark);
}
.hero-bg{
  position:absolute;inset:0;
  background-size:cover;background-position:center;
  opacity:1;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(26,13,51,0.50) 0%,rgba(2,119,189,0.40) 100%);
  z-index:1;
}
.hero h1,.hero .eng,.hero .sub,.hero .desc{text-shadow:0 2px 10px rgba(0,0,0,0.5)}
.hero::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(circle at 20% 30%,rgba(41,182,246,0.2) 0%,transparent 50%),
             radial-gradient(circle at 80% 70%,rgba(74,45,122,0.3) 0%,transparent 50%);
  z-index:1;pointer-events:none;
}
.hero-content{position:relative;z-index:2;padding:100px 24px 60px;max-width:1000px}
.hero h1{
  font-size:clamp(32px,5vw,64px);font-weight:800;line-height:1.15;
  margin-bottom:24px;letter-spacing:2px;
  background:linear-gradient(135deg,#fff 0%,#a5d8f8 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero .eng{font-size:14px;letter-spacing:3px;opacity:.75;margin-bottom:16px;text-transform:uppercase}
.hero .sub{font-size:clamp(16px,2vw,20px);opacity:.9;margin-bottom:20px;font-weight:300}
.hero .desc{font-size:15px;opacity:.8;max-width:780px;margin:0 auto 36px;line-height:1.9}
.hero-cta{text-align:center;display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* Secondary hero for inner pages */
.page-hero{
  position:relative;height:420px;
  display:flex;align-items:center;justify-content:center;
  color:#fff;text-align:center;overflow:hidden;
  background:var(--primary-dark);
  margin-top:0;
}
.page-hero .hero-bg{opacity:1}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(26,13,51,0.45) 0%,rgba(2,119,189,0.35) 100%);
  z-index:1;
}
.page-hero h1,.page-hero .eng,.page-hero p,.page-hero .breadcrumb{text-shadow:0 2px 10px rgba(0,0,0,0.50)}
.page-hero-content{position:relative;z-index:2;padding:100px 24px 40px;max-width:900px}
.page-hero h1{font-size:clamp(28px,4vw,48px);font-weight:700;margin-bottom:12px;letter-spacing:1px}
.page-hero .eng{font-size:13px;letter-spacing:2px;opacity:.75;margin-bottom:14px;text-transform:uppercase}
.page-hero p{font-size:16px;opacity:.85;max-width:700px;margin:0 auto}
.breadcrumb{
  margin-top:20px;font-size:13px;opacity:.75;
}
.breadcrumb a{color:#fff}
.breadcrumb a:hover{color:var(--accent-light)}
.breadcrumb span{margin:0 8px;opacity:.75}

/* ===== BUTTONS ===== */
.btn{
  display:inline-block;padding:14px 32px;border-radius:30px;
  font-weight:600;font-size:14px;letter-spacing:1px;
  cursor:pointer;transition:all .3s;border:none;
  text-align:center;
}
.btn-primary{
  background:var(--gradient);color:#fff;
  box-shadow:0 8px 24px rgba(2,119,189,0.3);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(2,119,189,0.5)}
.btn-outline{
  background:transparent;color:#fff;border:2px solid rgba(255,255,255,.6);
}
.btn-outline:hover{background:#fff;color:var(--primary)}
.btn-dark{background:var(--primary);color:#fff}
.btn-dark:hover{background:var(--primary-light)}
.btn-wrap{text-align:center;margin-top:32px}

/* ===== SECTIONS ===== */
section{padding:90px 0;position:relative}
.section-head{text-align:center;margin-bottom:60px}
.section-head .eyebrow{
  display:inline-block;font-size:12px;letter-spacing:3px;
  color:var(--accent);font-weight:600;text-transform:uppercase;
  margin-bottom:14px;
}
.section-head h2{
  font-size:clamp(26px,3.5vw,42px);font-weight:700;
  margin-bottom:16px;color:var(--text);line-height:1.3;
}
.section-head p{font-size:16px;color:var(--text-light);max-width:700px;margin:0 auto}
.bg-alt{background:var(--bg-alt)}
.bg-dark{background:var(--bg-dark);color:#fff}
.bg-dark .section-head h2{color:#fff}
.bg-dark .section-head p{color:rgba(255,255,255,.75)}
.bg-gradient{background:var(--gradient);color:#fff}
.bg-gradient .section-head h2{color:#fff}
.bg-gradient .section-head p{color:rgba(255,255,255,.9)}

/* ===== STATS ===== */
.stats{
  background:#0f0a1f url('../images/hero-home-2.jpg') center/cover no-repeat;
  color:#fff;padding:70px 0;
  position:relative;overflow:hidden;
}
.stats::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(26,13,51,0.50) 0%,rgba(2,119,189,0.55) 100%);
}
.stats .container{position:relative;z-index:1}
.stats .stat-num,.stats .stat-label,.stats .stat-sub{text-shadow:0 2px 8px rgba(0,0,0,0.5)}
.stats-grid{
  display:grid;grid-template-columns:repeat(6,1fr);gap:24px;
  position:relative;z-index:1;
}
.stat-item{text-align:center;padding:20px 10px}
.stat-num{
  font-size:clamp(32px,4vw,52px);font-weight:800;
  background:linear-gradient(135deg,#fff 0%,#5bc0de 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  line-height:1;margin-bottom:10px;
}
.stat-label{font-size:14px;font-weight:600;margin-bottom:4px}
.stat-sub{font-size:12px;opacity:.85}
@media(max-width:900px){.stats-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:500px){.stats-grid{grid-template-columns:repeat(2,1fr)}}

/* ===== SERVICE CARDS ===== */
.services{padding:100px 0;background:var(--bg-alt)}
.service-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.service-card{
  background:#fff;border-radius:16px;padding:40px 34px;
  box-shadow:var(--shadow);transition:all .4s;
  border:1px solid transparent;position:relative;overflow:hidden;
}
.service-card::before{
  content:"";position:absolute;top:0;left:0;width:100%;height:4px;
  background:var(--gradient);transform:scaleX(0);transform-origin:left;
  transition:transform .4s;
}
.service-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:#e0e7ff}
.service-card:hover::before{transform:scaleX(1)}
.service-icon{
  width:60px;height:60px;border-radius:12px;
  background:var(--gradient);display:flex;align-items:center;justify-content:center;
  margin-bottom:24px;font-size:26px;color:#fff;
}
.service-card h3{font-size:22px;font-weight:700;margin-bottom:14px;color:var(--text)}
.service-card p{color:var(--text-light);font-size:14px;line-height:1.8;margin-bottom:20px}
.service-card .more{color:var(--accent);font-weight:600;font-size:14px}
@media(max-width:768px){.service-grid{grid-template-columns:1fr}}

/* ===== CARDS GRID ===== */
.card-grid{display:grid;gap:24px}
.card-grid.cols-3{grid-template-columns:repeat(3,1fr)}
.card-grid.cols-4{grid-template-columns:repeat(4,1fr)}
.card-grid.cols-2{grid-template-columns:repeat(2,1fr)}
@media(max-width:900px){.card-grid.cols-3,.card-grid.cols-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.card-grid.cols-2,.card-grid.cols-3,.card-grid.cols-4{grid-template-columns:1fr}}

.card{
  background:#fff;border-radius:14px;padding:32px;
  box-shadow:var(--shadow);transition:all .3s;
  border:1px solid var(--border);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.card h3{font-size:18px;font-weight:700;margin-bottom:12px;color:var(--primary)}
.card h4{font-size:16px;font-weight:600;margin-bottom:10px;color:var(--text)}
.card p{color:var(--text-light);font-size:14px;line-height:1.7}
.card .label{
  display:inline-block;font-size:11px;padding:4px 10px;border-radius:20px;
  background:#e3f2fd;color:var(--accent);font-weight:600;margin-bottom:12px;
  letter-spacing:1px;
}

/* ===== TIMELINE ===== */
.timeline{position:relative;padding:40px 0;max-width:900px;margin:0 auto}
.timeline::before{
  content:"";position:absolute;left:50%;top:0;bottom:0;width:3px;
  background:var(--gradient);transform:translateX(-50%);
}
.tl-item{
  position:relative;width:50%;padding:20px 40px;
}
.tl-item:nth-child(odd){margin-left:0;text-align:right;padding-right:60px}
.tl-item:nth-child(even){margin-left:50%;text-align:left;padding-left:60px}
.tl-item::before{
  content:"";position:absolute;top:30px;width:20px;height:20px;
  background:#fff;border:4px solid var(--accent);border-radius:50%;
  box-shadow:0 0 0 6px rgba(2,119,189,0.15);
}
.tl-item:nth-child(odd)::before{right:-10px}
.tl-item:nth-child(even)::before{left:-10px}
.tl-card{
  background:#fff;padding:24px;border-radius:12px;
  box-shadow:var(--shadow);border:1px solid var(--border);
}
.tl-date{
  display:inline-block;font-size:13px;font-weight:700;color:var(--accent);
  margin-bottom:10px;letter-spacing:1px;
}
.tl-card h4{font-size:16px;font-weight:700;margin-bottom:10px;color:var(--primary)}
.tl-card p{font-size:13px;color:var(--text-light);line-height:1.7}
@media(max-width:768px){
  .timeline::before{left:20px}
  .tl-item{width:100%;padding:20px 20px 20px 50px!important;text-align:left!important;margin-left:0!important}
  .tl-item::before{left:10px!important;right:auto!important}
}

/* ===== PROSE (article content) ===== */
.prose{max-width:900px;margin:0 auto}
.prose p{margin-bottom:20px;color:var(--text-light);font-size:15px;line-height:1.9}
.prose h2{font-size:26px;font-weight:700;margin:40px 0 20px;color:var(--primary);border-left:4px solid var(--accent);padding-left:16px}
.prose h3{font-size:20px;font-weight:700;margin:30px 0 16px;color:var(--primary)}
.prose h4{font-size:17px;font-weight:600;margin:24px 0 12px;color:var(--text)}
.prose ul,.prose ol{margin:20px 0 20px 24px;color:var(--text-light)}
.prose ul li,.prose ol li{margin-bottom:10px;line-height:1.8}
.prose strong{color:var(--primary);font-weight:600}
.prose blockquote{
  border-left:4px solid var(--accent);padding:16px 24px;
  background:var(--bg-alt);margin:24px 0;border-radius:0 8px 8px 0;
  font-style:italic;color:var(--text);
}

/* ===== TABLES ===== */
.table-wrap{overflow-x:auto;margin:24px 0;border-radius:12px;box-shadow:var(--shadow)}
table{width:100%;border-collapse:collapse;background:#fff}
th,td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--border);font-size:14px}
th{background:var(--primary);color:#fff;font-weight:600;letter-spacing:1px}
tr:hover{background:var(--bg-alt)}
tr:last-child td{border-bottom:none}

/* ===== QUERY SECTION ===== */
.query-section{
  background:#0d2238 url('../images/hero-contact.jpg') center/cover no-repeat;
  color:#fff;padding:80px 0;
  position:relative;overflow:hidden;
}
.query-section::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(26,13,51,0.50) 0%,rgba(2,119,189,0.50) 100%);
}
.query-section .query-box h2,.query-section .query-box p{text-shadow:0 2px 10px rgba(0,0,0,0.5)}
.query-box{
  max-width:680px;margin:0 auto;position:relative;z-index:1;
  text-align:center;
}
.query-box h2{font-size:32px;font-weight:700;margin-bottom:14px;color:#fff}
.query-box p{font-size:15px;opacity:.9;margin-bottom:36px}
.query-form{
  background:rgba(255,255,255,.08);backdrop-filter:blur(10px);
  border:1px solid rgba(255,255,255,.2);
  padding:32px;border-radius:16px;
  display:grid;grid-template-columns:1fr 1fr;gap:16px;
}
.query-form input{
  padding:14px 18px;border-radius:8px;
  background:rgba(255,255,255,.95);border:none;
  font-size:14px;color:var(--text);
}
.query-form .full{grid-column:span 2}
.query-form .btn{grid-column:span 2;margin-top:8px}
@media(max-width:600px){.query-form{grid-template-columns:1fr}.query-form .full,.query-form .btn{grid-column:span 1}}

/* ===== FOOTER ===== */
footer{background:var(--primary-dark);color:#fff;padding:70px 0 30px}
.footer-grid{
  display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;
  margin-bottom:50px;
}
.footer-col h4{
  font-size:14px;font-weight:700;margin-bottom:20px;
  letter-spacing:2px;text-transform:uppercase;color:#fff;
  padding-bottom:12px;border-bottom:2px solid var(--accent);display:inline-block;
}
.footer-col ul{list-style:none}
.footer-col ul li{margin-bottom:10px;font-size:13px;opacity:.8}
.footer-col ul li a:hover{color:var(--accent-light);opacity:1}
.footer-brand img{height:56px;width:56px;margin-bottom:16px;background:#fff;border-radius:50%;padding:6px;box-shadow:0 4px 16px rgba(0,0,0,0.25)}
.footer-brand .name{font-size:16px;font-weight:700;margin-bottom:4px}
.footer-brand .eng{font-size:11px;opacity:.85;margin-bottom:16px;letter-spacing:1px}
.footer-brand p{font-size:13px;opacity:.75;line-height:1.8}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding-top:24px;text-align:center;font-size:13px;opacity:.85;
}
@media(max-width:900px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.footer-grid{grid-template-columns:1fr}}

/* ===== NEWS ===== */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
@media(max-width:900px){.news-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.news-grid{grid-template-columns:1fr}}
.news-card{
  background:#fff;border-radius:14px;overflow:hidden;
  box-shadow:var(--shadow);transition:all .3s;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.news-card .thumb{height:220px;background-size:cover;background-position:center}
.news-card .body{padding:24px}
.news-card .meta{font-size:12px;color:var(--muted);margin-bottom:10px}
.news-card h3{
  font-size:17px;font-weight:700;margin-bottom:12px;color:var(--text);line-height:1.5;
  min-height:calc(1.5em * 3);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;
  overflow:hidden;text-overflow:ellipsis;
}
.news-card h3 a{display:block}
.news-card h3 a:hover{color:var(--accent)}
.news-card p{font-size:13px;color:var(--text-light);line-height:1.7;margin-bottom:16px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.news-card .read{color:var(--accent);font-weight:600;font-size:13px}

.pagination{text-align:center;margin-top:50px}
.pagination button{
  background:#fff;border:1px solid var(--border);
  padding:10px 16px;margin:0 4px;border-radius:8px;cursor:pointer;
  font-size:14px;color:var(--text);transition:all .2s;
}
.pagination button:hover,.pagination button.active{
  background:var(--primary);color:#fff;border-color:var(--primary);
}

/* ===== ANNOUNCEMENT LIST ===== */
.ann-list{max-width:900px;margin:0 auto}
.ann-item{
  background:#fff;padding:28px 32px;margin-bottom:16px;
  border-radius:12px;border-left:4px solid var(--accent);
  box-shadow:var(--shadow);transition:all .3s;
  display:flex;gap:24px;align-items:center;
}
.ann-item:hover{transform:translateX(6px);box-shadow:var(--shadow-lg)}
.ann-item .date{
  flex-shrink:0;text-align:center;padding-right:24px;
  border-right:1px solid var(--border);
}
.ann-item .date .day{font-size:28px;font-weight:800;color:var(--primary)}
.ann-item .date .ym{font-size:12px;color:var(--muted)}
.ann-item .content h3{font-size:17px;font-weight:700;margin-bottom:8px;color:var(--text)}
.ann-item .content h3 a:hover{color:var(--accent)}
.ann-item .content p{font-size:13px;color:var(--text-light);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* ===== FEATURES / ICON GRID ===== */
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
@media(max-width:900px){.features{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.features{grid-template-columns:1fr}}
.feature{
  text-align:center;padding:36px 28px;
  background:#fff;border-radius:14px;box-shadow:var(--shadow);
  transition:all .3s;border:1px solid var(--border);
}
.feature:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.feature .icon{
  width:70px;height:70px;margin:0 auto 20px;border-radius:50%;
  background:var(--gradient);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:28px;
}
.feature h3{font-size:18px;font-weight:700;margin-bottom:12px;color:var(--primary)}
.feature p{color:var(--text-light);font-size:14px;line-height:1.7}

/* ===== CTA BAND ===== */
.cta-band{
  background:#0d2238 url('../images/hero-home-3.jpg') center/cover no-repeat;
  color:#fff;padding:80px 0;text-align:center;
  position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(26,13,51,0.50) 0%,rgba(2,119,189,0.50) 100%);
}
.cta-band h2,.cta-band p{text-shadow:0 2px 10px rgba(0,0,0,0.5)}
.cta-band-inner{position:relative;z-index:1;max-width:760px;margin:0 auto}
.cta-band h2{font-size:clamp(24px,3vw,36px);font-weight:700;margin-bottom:16px;color:#fff}
.cta-band p{font-size:16px;opacity:.92;margin-bottom:32px;line-height:1.8}

/* ===== WHITEPAPER CARDS ===== */
.wp-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
@media(max-width:900px){.wp-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.wp-grid{grid-template-columns:1fr}}
.wp-card{
  background:#fff;border-radius:14px;overflow:hidden;
  box-shadow:var(--shadow);transition:all .3s;
  border:1px solid var(--border);
}
.wp-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.wp-card .cover{
  height:180px;
  background:var(--gradient);
  background-size:cover;
  background-position:center;
  position:relative;
  display:flex;align-items:center;justify-content:center;
  color:#fff;position:relative;overflow:hidden;
}
.wp-card .cover::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(26,60,94,0.50) 0%,rgba(26,60,94,0.35) 100%);
}
.wp-card .cover .wp-code{
  position:relative;z-index:1;font-size:15px;font-weight:700;
  letter-spacing:2px;opacity:.95;
}
.wp-card .body{padding:26px}
.wp-card .label{
  display:inline-block;font-size:11px;padding:3px 10px;border-radius:20px;
  background:#e3f2fd;color:var(--accent);font-weight:600;margin-bottom:12px;
}
.wp-card h3{font-size:16px;font-weight:700;margin-bottom:10px;color:var(--text);line-height:1.5}
.wp-card .meta{font-size:12px;color:var(--muted);margin-bottom:14px}
.wp-card p{font-size:13px;color:var(--text-light);line-height:1.7;margin-bottom:16px;
  display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}

/* ===== ORG CHART ===== */
.org-chart{
  background:#fff;padding:40px;border-radius:16px;box-shadow:var(--shadow);
  text-align:center;
}
.org-level{margin-bottom:30px}
.org-box{
  display:inline-block;padding:20px 32px;border-radius:12px;
  background:var(--gradient);color:#fff;font-weight:600;
  margin:8px;box-shadow:0 8px 20px rgba(45,24,84,0.2);
  min-width:180px;
}
.org-box.sub{background:#fff;color:var(--primary);border:2px solid var(--accent);box-shadow:none}

/* ===== UTILITY ===== */
.text-center{text-align:center}
.mt-20{margin-top:20px}
.mt-40{margin-top:40px}
.mb-20{margin-bottom:20px}
.mb-40{margin-bottom:40px}
.highlight{color:var(--accent);font-weight:600}

/* ===== FADE-IN ANIMATION ===== */
.fade-up{opacity:0;transform:translateY(30px);transition:all .8s}
.fade-up.visible{opacity:1;transform:translateY(0)}

@media(max-width:1180px){
  .nav-menu{display:none}
  section{padding:60px 0}
  .page-hero{height:340px}
}


/* == article detail styles (appended by build_pages.py) == */
.article-body{max-width:800px;margin:0 auto;padding:60px 20px;background:#fff}
.article-body p{font-size:17px;line-height:1.9;color:#333;margin-bottom:24px;text-align:justify}
.article-nav{max-width:800px;margin:0 auto;padding:40px 20px 20px;border-top:1px solid #e5e5e5;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.article-nav a{color:#3498b4;text-decoration:none;font-size:15px;max-width:45%}
.article-nav a:hover{color:#1a3c5e}
.back-btn-wrap{text-align:center;padding:20px 20px 80px}
.back-btn{display:inline-block;padding:14px 36px;background:#1a3c5e;color:#fff;border-radius:6px;text-decoration:none;font-size:15px;transition:all .3s}
.back-btn:hover{background:#3498b4;color:#fff}
@media(max-width:640px){.article-body p{font-size:16px}.article-nav a{max-width:100%}}


/* == mobile nav (appended by build_pages.py) == */
/* base layout tweaks for the new nav structure */
.nav-logo{flex:0 0 auto;margin-right:18px}
.nav-actions{display:flex;align-items:center;gap:10px}
@media(min-width:1181px){
  .nav-inner{gap:14px}
  .nav-logo{margin-right:10px}
  .nav-menu{flex:1 1 auto;min-width:0;justify-content:center;gap:2px}
  .nav-menu>li{flex:0 1 auto}
  .nav-menu>li>a{
    height:64px;
    display:flex;
    align-items:center;
    justify-content:center;
    gap:5px;
    padding:0 10px;
    line-height:18px;
    white-space:nowrap;
    text-align:center;
  }
  .nav-menu>li>a .lang-zh,
  .nav-menu>li>a .lang-en{white-space:nowrap}
  .nav-actions{flex:0 0 auto}
}
@media(min-width:1181px) and (max-width:1360px){
  .nav-inner{padding:0 18px;gap:10px}
  .nav-logo{margin-right:6px}
  .nav-logo img{height:32px}
  .nav-logo span{font-size:15px}
  .nav-logo small{font-size:9px}
  .nav-menu{gap:0}
  .nav-menu>li>a{padding:0 7px;font-size:13px}
  .nav-actions{gap:6px}
  .nav-search,
  .lang-toggle-btn{width:34px;height:34px}
}
/* search dropdown box: input + submit button */
.search-box form{display:flex;align-items:center;gap:10px;max-width:640px;margin:0 auto;padding:0}
.search-box input{flex:1;width:auto;max-width:none;margin:0;display:block;background:var(--bg-alt);border:1px solid var(--border);color:var(--text);padding:12px 20px;border-radius:999px;font-size:15px;outline:none;transition:border-color .2s,background .2s}
.search-box input:focus{border-color:var(--accent);background:#fff}
.search-box button[type=submit]{flex:none;width:44px;height:44px;border-radius:50%;background:var(--primary);border:none;color:#fff;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:background .2s}
.search-box button[type=submit]:hover{background:var(--accent)}
.search-box button[type=submit] svg{width:18px;height:18px;fill:#fff}
/* hamburger button (mobile only) */
.mob-toggle{display:none}
.mob-overlay{display:none}
@media(max-width:1180px){
  /* 修复：backdrop-filter 会让 navbar 成为后代 position:fixed 的 containing block，导致内嵌菜单面板被 navbar 的 64px 高度裁掉 */
  .navbar,.navbar.scrolled{backdrop-filter:none;-webkit-backdrop-filter:none}
  .nav-inner{padding:0 20px;gap:8px}
  .mob-toggle{display:flex;flex-direction:column;justify-content:space-between;width:28px;height:20px;padding:0;background:none;border:none;cursor:pointer;z-index:1001;position:relative}
  .mob-toggle span{display:block;width:100%;height:2.5px;background:var(--primary);border-radius:2px;transition:transform .3s ease,opacity .2s}
  .mob-toggle.open span:nth-child(1){transform:translateY(8.75px) rotate(45deg)}
  .mob-toggle.open span:nth-child(2){opacity:0}
  .mob-toggle.open span:nth-child(3){transform:translateY(-8.75px) rotate(-45deg)}
  .mob-overlay{display:block;position:fixed;inset:0;background:rgba(16,29,50,.55);opacity:0;visibility:hidden;transition:opacity .3s,visibility .3s;z-index:998;backdrop-filter:blur(2px)}
  .navbar.open .mob-overlay{opacity:1;visibility:visible}
  .nav-menu{display:flex !important;flex-direction:column;align-items:stretch;gap:0;position:fixed;top:64px;right:-340px;bottom:0;width:300px;max-width:85vw;padding:8px 0 60px;background:#fff;overflow-y:auto;box-shadow:-14px 0 40px rgba(10,20,45,.18);transition:right .35s cubic-bezier(.4,0,.2,1);z-index:999}
  .navbar.open .nav-menu{right:0}
  .nav-menu>li{position:relative;width:100%;border-bottom:1px solid var(--border)}
  .nav-menu>li:last-child{border-bottom:none}
  .nav-menu>li>a{padding:16px 24px;font-size:15px;font-weight:500;display:flex;align-items:center;justify-content:space-between;border-left:4px solid transparent;color:var(--text)}
  .nav-menu>li>a:hover{color:var(--accent)}
  .nav-menu>li.active>a{color:var(--accent);border-left-color:var(--accent)}
  .nav-menu>li.has-dd>a::after{content:"";width:8px;height:8px;border-right:2px solid var(--text-light);border-bottom:2px solid var(--text-light);transform:rotate(45deg);transition:transform .3s;flex-shrink:0;margin-left:8px;display:inline-block}
  .nav-menu>li.has-dd.open>a::after{transform:rotate(-135deg);border-color:var(--accent)}
  .nav-menu>li.has-dd.open>a{color:var(--accent);border-left-color:var(--accent);background:var(--bg-alt)}
  .nav-menu .dropdown{position:static;transform:none;opacity:1;visibility:visible;box-shadow:none;border-radius:0;padding:0;min-width:0;background:var(--bg-alt);max-height:0;overflow:hidden;transition:max-height .35s ease,padding .35s ease}
  .nav-menu>li.has-dd.open .dropdown{max-height:480px;padding:6px 0}
  .nav-menu>li:hover .dropdown{transform:none}
  .dropdown li{list-style:none}
  .dropdown li a{display:block;padding:12px 40px;font-size:14px;border-left:3px solid transparent;color:var(--text-light);text-align:left}
  .dropdown li a:hover{color:var(--primary);border-left-color:var(--accent);background:#fff}
  /* search dropdown: slide down inside viewport, not hidden behind menu */
  .search-box{top:64px;z-index:1002;padding:16px 20px}
  .search-box form{gap:8px}
  .search-box button[type=submit]{width:42px;height:42px}
  body.mob-menu-lock{overflow:hidden}
}
@media(max-width:480px){.nav-logo span{font-size:14px}.nav-logo small{font-size:9px}.nav-logo img{height:30px}.nav-inner{padding:0 16px}}


/* == features cols-4 variant (appended by build_pages.py) == */
/* 仅对添加了 .cols-4 类的 .features 生效（会员体系页用），不影响其他 .features */
.features.cols-4{grid-template-columns:repeat(4,1fr);gap:20px}
.features.cols-4 .feature{padding:24px 18px}
@media(max-width:1100px){.features.cols-4{grid-template-columns:repeat(2,1fr);gap:24px}}
@media(max-width:600px){.features.cols-4{grid-template-columns:1fr}}


/* == active nav highlight (appended by build_pages.py) == */
/* 桌面端：当前栏目顶级菜单项 — 青色文字 + 底部 3px 青色指示条 */
.nav-menu>li.active>a{color:var(--accent);font-weight:600;box-shadow:inset 0 -3px 0 var(--accent)}
/* 移动端：恢复左侧青色 border 指示、浅色底、无底部条 */
@media(max-width:900px){
  .nav-menu>li.active>a{box-shadow:none;background:rgba(52,152,180,0.07)}
}


/* == data-table align (appended by build_pages.py) == */
.data-table{max-width:900px;margin:0 auto}


/* == pagination styles (appended by build_pages.py) == */
.pagination ul{list-style:none;padding:0;margin:0;display:inline-flex;gap:8px;flex-wrap:wrap;justify-content:center}
.pagination li{display:inline-flex}
.pagination li > a,.pagination li > span{display:inline-flex;align-items:center;justify-content:center;min-width:40px;height:40px;padding:0 14px;background:#fff;border:1px solid var(--border);border-radius:8px;color:var(--text);font-size:14px;text-decoration:none;transition:all .2s;line-height:1}
.pagination li > a:hover{background:var(--primary);color:#fff;border-color:var(--primary)}
.pagination li.active > span{background:var(--primary);color:#fff;border-color:var(--primary);cursor:default}
.pagination li.disabled > span{color:#bbb;background:#f7f7f7;cursor:not-allowed}
@media(max-width:640px){.pagination li > a,.pagination li > span{min-width:36px;height:36px;padding:0 10px;font-size:13px}}