:root{
  --ink:#111827;
  --navy:#0b1f35;
  --blue:#174366;
  --teal:#0d7c89;
  --teal-light:#e9f7f8;
  --gold:#b8934f;
  --text:#1f2937;
  --muted:#687589;
  --line:#e7edf3;
  --soft:#f6f8fb;
  --white:#fff;
  --shadow:0 18px 45px rgba(15,31,53,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--text);background:#fff;line-height:1.75}
a{text-decoration:none;color:inherit}
.container{width:min(1180px,92%);margin:0 auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.95);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
.nav-wrap{height:78px;display:flex;align-items:center;justify-content:space-between;gap:28px}
.brand{display:flex;align-items:center;gap:14px;color:var(--ink)}
.brand-mark{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:#0b1f35;color:#fff;font-family:Georgia,serif;font-size:22px;font-weight:700;letter-spacing:-1px}
.brand strong{display:block;font-size:20px;letter-spacing:.4px;font-weight:800}
.brand small{display:block;color:#7b8796;font-size:11px;letter-spacing:.14em;margin-top:-5px}
.site-nav{display:flex;align-items:center;gap:26px;font-size:14px;font-weight:700;color:#32465a}
.site-nav a{white-space:nowrap}
.site-nav a:hover,.site-nav a.active{color:var(--teal)}
.nav-cta{padding:10px 18px;border-radius:999px;background:var(--navy);color:#fff!important}
.nav-login{color:#32465a!important}
.mobile-menu-btn{display:none;border:0;background:#eef6f7;color:var(--teal);border-radius:10px;padding:8px 11px;font-size:20px}

.hero-official{position:relative;padding:92px 0 0;background:linear-gradient(180deg,#fbfcfe 0%,#f4f8fb 100%);overflow:hidden}
.hero-official:before{content:"";position:absolute;right:-260px;top:-260px;width:720px;height:720px;border-radius:50%;background:radial-gradient(circle,rgba(13,124,137,.12),transparent 68%)}
.hero-official:after{content:"";position:absolute;left:-220px;bottom:110px;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,rgba(184,147,79,.10),transparent 68%)}
.hero-official-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.08fr .92fr;gap:72px;align-items:center;padding-bottom:76px}
.eyebrow,.section-kicker{display:inline-flex;align-items:center;gap:12px;font-size:12px;letter-spacing:.18em;color:var(--teal);font-weight:800;margin-bottom:18px}
.eyebrow:before,.section-kicker:before{content:"";width:34px;height:1px;background:var(--gold)}
.hero-text h1{margin:0;font-size:62px;line-height:1.14;letter-spacing:-1.8px;color:#0c1c2d;font-weight:850}
.lead{margin:24px 0 0;font-size:18px;color:#5b6878;max-width:740px}
.hero-actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-top:36px}
.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;padding:13px 24px;font-weight:800;border:1px solid transparent;cursor:pointer;transition:.2s}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--navy);color:#fff;box-shadow:0 14px 28px rgba(11,31,53,.16)}
.btn-outline{background:#fff;border-color:#cfd9e3;color:var(--navy)}
.btn-light{background:#fff;color:var(--navy)}
.link-action,.text-link{font-weight:800;color:var(--teal)}
.full{width:100%;grid-column:1/-1}

.hero-visual{position:relative}
.visual-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:28px;padding:28px;box-shadow:0 28px 70px rgba(15,31,53,.12);min-height:420px;overflow:hidden}
.visual-card:before{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(13,124,137,.08),transparent 38%),radial-gradient(circle at 80% 20%,rgba(184,147,79,.18),transparent 28%)}
.visual-card>*{position:relative;z-index:1}
.visual-top{display:flex;gap:8px;margin-bottom:58px}
.dot{width:10px;height:10px;border-radius:50%;background:#d3dde7}
.dot:nth-child(1){background:#0d7c89}
.dot:nth-child(2){background:#b8934f}
.visual-title{font-size:34px;font-weight:850;color:#0c1c2d;line-height:1.2;margin-bottom:30px}
.visual-line{height:12px;background:#e9eef4;border-radius:999px;width:62%;margin-bottom:13px}
.visual-line.wide{width:86%;background:#dfeaf0}
.visual-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:54px}
.visual-grid div{border:1px solid #e4ebf1;border-radius:18px;padding:18px;background:rgba(255,255,255,.76)}
.visual-grid strong{display:block;color:#0c1c2d;font-size:18px}
.visual-grid span{font-size:12px;color:#7b8796;letter-spacing:.08em;text-transform:uppercase}
.hero-stats{position:relative;z-index:2;display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);background:#fff;box-shadow:0 -8px 30px rgba(15,31,53,.04)}
.hero-stats div{padding:26px 24px;border-right:1px solid var(--line)}
.hero-stats div:last-child{border-right:0}
.hero-stats strong{display:block;color:#0c1c2d;font-size:20px;margin-bottom:4px}
.hero-stats span{color:#718096;font-size:14px}

.section{padding:92px 0}
.section-white{background:#fff}
.section-muted{background:#f7f9fb}
.section-dark{background:#0b1f35;color:#fff;padding:74px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;margin-bottom:40px}
.section-head.center{display:block;text-align:center}
.section-head h2,.two-column-title h2,.dark-inner h2,.feature-panel h2{margin:0 0 12px;font-size:38px;line-height:1.22;color:#0c1c2d;letter-spacing:-.8px}
.section-head.center p{margin-left:auto;margin-right:auto}
.section-head p,.two-column-title p,.feature-panel p{margin:0;color:#667589;max-width:720px}
.section-more{text-align:center;margin-top:34px}
.two-column-title{display:grid;grid-template-columns:1fr .9fr;gap:70px;align-items:end;margin-bottom:42px}

.official-grid .conf-card{box-shadow:none}
.conference-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.conf-card{background:#fff;border:1px solid var(--line);border-radius:22px;overflow:hidden;box-shadow:var(--shadow);transition:.22s}
.conf-card:hover{transform:translateY(-4px);box-shadow:0 24px 55px rgba(15,31,53,.12)}
.conf-cover{height:168px;padding:22px;color:#fff;display:flex;flex-direction:column;justify-content:space-between;background:linear-gradient(135deg,#174366,#0d7c89)}
.conf-cover.blue{background:linear-gradient(135deg,#174366,#0b1f35)}
.conf-cover.green{background:linear-gradient(135deg,#0d7c89,#2e8b68)}
.conf-cover.orange{background:linear-gradient(135deg,#b8934f,#0d7c89)}
.conf-cover.purple{background:linear-gradient(135deg,#4a5f9e,#174366)}
.conf-cover.dark{background:linear-gradient(135deg,#0b1f35,#174366)}
.conf-acronym{font-size:28px;font-weight:850;letter-spacing:.04em}
.conf-cover p{margin:0;font-weight:700}
.conf-body{padding:22px}
.badges{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.badge{font-size:12px;font-weight:800;padding:5px 9px;border-radius:999px;background:#eef7f8;color:var(--teal)}
.badge.green{background:#edf8ee;color:#22744a}
.badge.blue{background:#edf3fb;color:#2b5f97}
.badge.status{background:#fff5e5;color:#8f6726}
.conf-body h3{font-size:18px;line-height:1.42;margin:0 0 10px;color:#0c1c2d}
.meta{color:#6b7788;font-size:14px;margin:6px 0}
.conf-footer{border-top:1px solid var(--line);margin-top:18px;padding-top:18px;display:flex;gap:10px;justify-content:space-between}
.small-btn{padding:8px 13px;border-radius:999px;font-size:13px;font-weight:800;background:#f1f6f7;color:var(--teal)}
.small-btn.primary{background:#0b1f35;color:#fff}

.service-list{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:#fff;border:1px solid var(--line);border-radius:26px;overflow:hidden}
.service-list article{padding:30px;border-right:1px solid var(--line)}
.service-list article:last-child{border-right:0}
.service-list span{font-size:13px;color:var(--gold);font-weight:900}
.service-list h3{margin:12px 0 10px;font-size:20px;color:#0c1c2d}
.service-list p{margin:0;color:#687589;font-size:15px}

.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.case-card{background:#fff;border:1px solid var(--line);border-radius:22px;overflow:hidden;box-shadow:var(--shadow)}
.case-cover{height:138px;background:linear-gradient(135deg,#0b1f35,#0d7c89);color:#fff;padding:22px;display:flex;align-items:end;font-size:21px;font-weight:850;line-height:1.25}
.case-body{padding:22px}
.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:16px 0}
.stat-row div{background:#f7f9fb;border-radius:14px;text-align:center;padding:10px}
.stat-row strong{display:block;color:var(--teal);font-size:20px}
.stat-row span{font-size:12px;color:#728094}

.dark-inner{display:flex;align-items:center;justify-content:space-between;gap:42px}
.dark-inner h2{color:#fff;font-size:40px}
.dark-inner p{color:rgba(255,255,255,.74);max-width:760px;font-size:17px}
.dark-inner .section-kicker{color:#d9c391}

.split-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.feature-panel{border:1px solid var(--line);border-radius:26px;padding:36px;background:#fff;box-shadow:0 12px 32px rgba(15,31,53,.05)}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px}
.news-card time{color:var(--teal);font-weight:800;font-size:13px}
.news-card h3{font-size:19px;margin:8px 0;color:#0c1c2d}
.news-card p{color:#687589;margin:0}

.site-footer{background:#081827;color:#bdc8d6;padding:54px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:34px}
.footer-brand{color:#fff}
.footer-brand .brand-mark{background:#fff;color:#0b1f35}
.site-footer a{display:block;margin:8px 0;color:#bdc8d6}
.site-footer h4{color:#fff;margin:0 0 10px}
.footer-bottom{text-align:center;border-top:1px solid rgba(255,255,255,.08);margin-top:38px;padding:18px;color:#8493a8;font-size:13px}
.compact{padding-top:0}

/* sub pages inherited */
.page-hero{padding:82px 0;background:linear-gradient(180deg,#fbfcfe,#f4f8fb)}
.page-hero h1{font-size:48px;margin:0 0 12px;color:#0c1c2d}
.page-hero p{font-size:18px;color:#667589;max-width:840px}
.bg-light{background:#f7f9fb}
.bg-blue{background:#0b1f35;color:#fff}
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.service-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:26px;box-shadow:0 12px 30px rgba(15,31,53,.05)}
.service-card span{display:inline-block;color:var(--gold);font-weight:900;margin-bottom:12px}
.service-card h3{margin:0 0 10px;color:#0c1c2d}
.service-card p{margin:0;color:#667589}
.light .service-card p,.section-head.light p,.section-head.light .section-kicker{color:rgba(255,255,255,.78)}
.filter-panel{background:#fff;border:1px solid var(--line);border-radius:22px;padding:20px;margin-bottom:28px}
.filter-row{display:flex;gap:10px;flex-wrap:wrap;margin:7px 0}
.filter-btn{border:1px solid #dce5ee;background:#fff;color:#42566b;border-radius:999px;padding:8px 14px;font-weight:800;cursor:pointer}
.filter-btn.active{background:#0b1f35;color:#fff;border-color:#0b1f35}
.detail-hero{padding:78px 0;background:linear-gradient(135deg,#0b1f35,#174366);color:#fff}
.detail-hero h1{font-size:42px;line-height:1.22;margin:8px 0 14px}
.detail-meta{display:flex;flex-wrap:wrap;gap:12px;color:rgba(255,255,255,.86)}
.detail-layout{display:grid;grid-template-columns:260px 1fr;gap:30px}
.anchor-nav{position:sticky;top:96px;align-self:start;background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px}
.anchor-nav a{display:block;padding:10px;border-radius:10px;color:#42566b;font-weight:800}
.anchor-nav a:hover{background:#eef7f8;color:var(--teal)}
.detail-content{display:grid;gap:20px}
.content-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:30px;box-shadow:0 12px 32px rgba(15,31,53,.05)}
.content-card h2{margin-top:0;color:#0c1c2d}
.topic-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.date-grid,.result-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.date-card,.result-card{background:#f7f9fb;border-radius:16px;padding:16px;text-align:center}
.date-card strong,.result-card strong{display:block;color:var(--teal);font-size:23px}
.timeline{display:grid;grid-template-columns:repeat(9,1fr);gap:10px}
.timeline div{background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px;text-align:center;font-weight:800;color:#0b1f35}
.form-layout{display:grid;grid-template-columns:.82fr 1.18fr;gap:34px;align-items:start}
.form-copy{background:#f7f9fb;border:1px solid var(--line);border-radius:22px;padding:32px}
.apply-form{background:#fff;border:1px solid var(--line);border-radius:22px;padding:26px;box-shadow:var(--shadow);display:grid;grid-template-columns:1fr 1fr;gap:16px}
.apply-form label,.auth-card label{display:grid;gap:7px;font-weight:800;color:#203041}
input,select,textarea{width:100%;border:1px solid #dbe5ee;background:#fbfcfe;border-radius:12px;padding:12px 13px;font:inherit;outline:none}
textarea{min-height:110px;resize:vertical}
input:focus,textarea:focus,select:focus{border-color:var(--teal);background:#fff}
.form-tip{grid-column:1/-1;color:var(--teal);font-weight:800}
.checkbox{display:flex!important;align-items:center;gap:10px}
.checkbox input{width:auto}

/* auth */
.auth-body{background:#fff}
.auth-shell{min-height:100vh;display:grid;grid-template-columns:40% 60%}
.auth-side{background:linear-gradient(135deg,#0b1f35,#174366);color:#fff;padding:58px;display:flex;flex-direction:column;justify-content:space-between;position:relative;overflow:hidden}
.auth-side:after{content:"";position:absolute;width:580px;height:580px;border:1px solid rgba(255,255,255,.10);border-radius:50%;left:-160px;bottom:-220px}
.auth-brand{color:#fff;position:relative;z-index:1}
.auth-brand .brand-mark{background:#fff;color:#0b1f35}
.auth-brand small{color:rgba(255,255,255,.72)}
.auth-copy{position:relative;z-index:1}
.auth-copy h1{font-size:40px;margin:0 0 16px}
.auth-copy p{font-size:17px;color:rgba(255,255,255,.78)}
.auth-tags{display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:1}
.auth-tags span{font-weight:800}
.auth-main{position:relative;display:flex;align-items:center;justify-content:center;min-height:100vh;padding:80px 24px}
.auth-top{position:absolute;top:28px;right:44px;display:flex;gap:22px;align-items:center;color:#0b1f35;font-weight:800}
.auth-card{width:min(430px,100%);background:#fff;border:1px solid var(--line);border-radius:22px;padding:36px;box-shadow:0 24px 60px rgba(15,31,53,.10)}
.auth-card.wide{width:min(640px,100%)}
.auth-card h2{font-size:28px;margin:0 0 6px;color:#0c1c2d}
.auth-card p{color:#667589}
.auth-card form{display:grid;gap:16px}
.register-form{grid-template-columns:1fr 1fr}
.register-form button{grid-column:1/-1}
.muted-link{color:#7d8b9d;font-size:14px}
.auth-switch{text-align:center}
.auth-switch a,.back-link{color:var(--teal);font-weight:800}
.back-link{position:absolute;bottom:82px}
.auth-footer{position:absolute;bottom:28px;color:#8a99aa;font-size:13px}
.placeholder-page{background:#fff;border:1px solid var(--line);border-radius:22px;padding:42px;text-align:center;box-shadow:var(--shadow)}

@media (max-width:960px){
  .mobile-menu-btn{display:block}
  .site-nav{display:none;position:absolute;top:78px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:16px 4%;flex-direction:column;align-items:flex-start}
  .site-nav.open{display:flex}
  .hero-official-inner,.two-column-title,.split-grid,.form-layout,.detail-layout,.auth-shell{grid-template-columns:1fr}
  .hero-text h1{font-size:46px}
  .conference-grid,.case-grid,.news-grid,.service-grid{grid-template-columns:1fr 1fr}
  .service-list{grid-template-columns:1fr 1fr}
  .service-list article{border-bottom:1px solid var(--line)}
  .hero-stats{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .timeline{grid-template-columns:1fr 1fr 1fr}
  .auth-side{min-height:420px}
  .auth-main{min-height:auto}
  .auth-top{position:static;margin-bottom:20px;flex-wrap:wrap}
}
@media (max-width:640px){
  .hero-official{padding-top:58px}
  .hero-official-inner{gap:38px}
  .hero-text h1,.page-hero h1{font-size:36px}
  .lead{font-size:16px}
  .conference-grid,.case-grid,.news-grid,.service-grid,.service-list,.topic-list,.date-grid,.result-grid,.apply-form,.register-form{grid-template-columns:1fr}
  .section{padding:58px 0}
  .section-head{display:block}
  .section-head h2,.two-column-title h2,.dark-inner h2,.feature-panel h2{font-size:30px}
  .hero-stats{grid-template-columns:1fr}
  .hero-stats div{border-right:0;border-bottom:1px solid var(--line)}
  .visual-card{min-height:auto}
  .visual-grid{grid-template-columns:1fr}
  .dark-inner{display:block}
  .footer-grid{grid-template-columns:1fr}
  .timeline{grid-template-columns:1fr}
  .auth-side{padding:36px 26px}
  .auth-copy h1{font-size:32px}
  .auth-main{padding:34px 18px 80px}
  .auth-footer,.back-link{position:static;margin-top:20px;text-align:center}
}