/* ===== ICACS 2026 conference site ===== */
:root{
  --navy:#17357f;
  --navy-deep:#0e2258;
  --red:#b31e24;
  --red-deep:#8f1418;
  --ink:#22293a;
  --muted:#5f6b80;
  --line:#dfe6f2;
  --bg:#f4f7fc;
  --card:#ffffff;
  --blue-soft:#e8effc;
  --shadow:0 10px 30px rgba(23,53,127,.08);
  --serif:Georgia,"Songti SC","STSong","SimSun","Noto Serif SC",serif;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--sans);color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--navy);text-decoration:none}
ul{list-style:none}

/* language switching */
html.en .zh{display:none!important}
html.zh .en{display:none!important}
/* avoid duplicated English labels in EN mode */
html.en .section-head .sub{display:none}
html.en .hero .eyebrow{display:none}

/* embedded mode: shown inside asianceramics.org page, which provides its own header/footer */
html.embedded .site-header{display:none}
html.embedded #toTop{display:none!important}
html.embedded .hero{padding-top:70px}
html.embedded section{scroll-margin-top:0}
html.embedded .lang-btn{position:absolute;top:16px;right:16px;z-index:5;background:rgba(255,255,255,.92)}

.container{max-width:1140px;margin:0 auto;padding:0 22px}
section{scroll-margin-top:86px}

/* ===== header ===== */
.site-header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{max-width:1240px;margin:0 auto;padding:0 22px;height:68px;display:flex;align-items:center;gap:18px}
.brand{display:flex;align-items:center;gap:11px;min-width:0}
.brand img{width:44px;height:44px;flex:none}
.brand-text{line-height:1.3;min-width:0}
.brand-text strong{display:block;font-size:15px;color:var(--navy-deep);font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand-text small{display:block;font-size:11px;color:var(--muted);letter-spacing:.04em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.main-nav{margin-left:auto;display:flex;align-items:center;gap:2px}
.main-nav a{font-size:13.5px;padding:7px 9px;border-radius:8px;color:var(--ink);white-space:nowrap;transition:color .15s,background .15s}
.main-nav a:hover{color:var(--navy);background:var(--blue-soft)}
.main-nav a.active{color:var(--red);font-weight:600}
.lang-btn{flex:none;margin-left:6px;border:1.5px solid var(--navy);color:var(--navy);background:transparent;font-family:var(--sans);font-size:12.5px;font-weight:600;padding:6px 14px;border-radius:999px;cursor:pointer;letter-spacing:.05em;transition:all .15s}
.lang-btn:hover{background:var(--navy);color:#fff}
.nav-toggle{display:none;flex:none;margin-left:auto;background:none;border:none;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--navy-deep);margin:5px 0;border-radius:2px;transition:transform .2s,opacity .2s}

/* ===== hero ===== */
.hero{position:relative;padding:158px 22px 86px;text-align:center;background:#eaf1fb url("../img/bg-hero.jpg") center bottom/cover no-repeat;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(240,246,255,.82) 0%,rgba(240,246,255,.35) 38%,rgba(236,243,253,.15) 62%,rgba(233,241,252,.55) 100%)}
.hero-inner{position:relative;z-index:1;max-width:900px;margin:0 auto}
.hero-logo{width:96px;height:96px;margin:0 auto 22px;filter:drop-shadow(0 6px 18px rgba(23,53,127,.25))}
.hero .eyebrow{font-family:var(--serif);font-size:14px;letter-spacing:.16em;text-transform:uppercase;color:var(--navy);margin-bottom:14px}
.hero h1{font-family:var(--serif);font-size:44px;line-height:1.25;color:var(--navy-deep);font-weight:700;margin-bottom:6px}
.hero .wordmark{font-family:var(--serif);font-size:60px;font-weight:800;letter-spacing:.04em;color:var(--navy);margin-bottom:14px}
.hero .wordmark em{font-style:normal;color:var(--red)}
.hero .tagline{font-size:12.5px;letter-spacing:.32em;text-transform:uppercase;color:#42506b;margin-bottom:26px}
.meta-pills{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-bottom:30px}
.meta-pills span{display:inline-flex;align-items:center;gap:7px;background:rgba(255,255,255,.85);border:1px solid rgba(23,53,127,.18);border-radius:999px;padding:8px 18px;font-size:15px;color:var(--navy-deep);font-weight:500;box-shadow:0 4px 14px rgba(23,53,127,.07)}
.countdown{display:flex;justify-content:center;gap:12px;margin-bottom:32px}
.cd-chip{background:rgba(255,255,255,.9);border:1px solid rgba(23,53,127,.15);border-radius:12px;min-width:74px;padding:10px 8px 8px;box-shadow:0 4px 14px rgba(23,53,127,.07)}
.cd-chip b{display:block;font-family:var(--serif);font-size:28px;line-height:1.1;color:var(--navy);font-variant-numeric:tabular-nums}
.cd-chip i{font-style:normal;font-size:11px;color:var(--muted);letter-spacing:.08em}
.cd-live{display:none;font-family:var(--serif);font-size:22px;color:var(--red);letter-spacing:.1em;margin-bottom:32px}
.hero-cta{display:flex;flex-wrap:wrap;justify-content:center;gap:14px}
.btn{display:inline-flex;align-items:center;gap:8px;border-radius:999px;padding:12px 30px;font-size:15.5px;font-weight:600;transition:transform .15s,box-shadow .15s,background .15s;cursor:pointer;border:none;font-family:var(--sans)}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--red);color:#fff;box-shadow:0 8px 22px rgba(179,30,36,.32)}
.btn-primary:hover{background:var(--red-deep);color:#fff}
.btn-navy{background:var(--navy);color:#fff;box-shadow:0 8px 22px rgba(23,53,127,.3)}
.btn-navy:hover{background:var(--navy-deep);color:#fff}
.btn-ghost{background:rgba(255,255,255,.85);border:1.5px solid var(--navy);color:var(--navy)}
.btn-ghost:hover{background:var(--navy);color:#fff}

/* ===== sections ===== */
.section{padding:74px 0}
.section.alt{background:#fff}
.section-head{text-align:center;margin-bottom:44px}
.seal{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;background:var(--red);color:#fff;font-family:var(--serif);font-size:20px;border-radius:8px;box-shadow:0 4px 12px rgba(179,30,36,.3);margin-bottom:12px}
.section-head h2{font-family:var(--serif);font-size:31px;color:var(--navy-deep);font-weight:700;line-height:1.3}
.section-head .sub{margin-top:6px;font-size:12.5px;letter-spacing:.22em;text-transform:uppercase;color:var(--muted)}
.section-head .rule{width:64px;height:3px;margin:16px auto 0;background:linear-gradient(90deg,var(--navy),var(--red));border-radius:2px}
.section-note{max-width:820px;margin:-26px auto 34px;text-align:center;color:var(--muted);font-size:14.5px}

.card{background:var(--card);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);padding:28px}
.card h3{font-family:var(--serif);font-size:20px;color:var(--navy-deep);margin-bottom:14px;display:flex;align-items:center;gap:9px}
.card h3 .dot{width:8px;height:8px;border-radius:50%;background:var(--red);flex:none}

/* about */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px}
.about-grid p{color:#3c4459;font-size:15.5px;text-align:justify}
.theme-chips{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-top:34px}
.theme-chips span{background:var(--blue-soft);border:1px solid rgba(23,53,127,.15);color:var(--navy);border-radius:999px;padding:8px 20px;font-size:14.5px;font-weight:600}

/* important dates */
.dates-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(196px,1fr));gap:18px}
.date-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px 18px;text-align:center;box-shadow:var(--shadow);position:relative;overflow:hidden}
.date-card::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--navy)}
.date-card.hot::before{background:var(--red)}
.date-card .d{font-family:var(--serif);font-size:19px;font-weight:700;color:var(--navy);line-height:1.35;margin-bottom:8px}
.date-card.hot .d{color:var(--red)}
.date-card .l{font-size:14px;color:var(--muted)}
.date-card .badge{position:absolute;top:10px;right:-30px;background:var(--red);color:#fff;font-size:10.5px;padding:2px 32px;transform:rotate(38deg);letter-spacing:.06em}

/* tables */
.table-wrap{overflow-x:auto;border-radius:14px;border:1px solid var(--line);box-shadow:var(--shadow);background:#fff}
table.tbl{width:100%;border-collapse:collapse;min-width:560px;font-size:15px}
table.tbl th{background:var(--navy);color:#fff;font-weight:600;padding:14px 18px;text-align:left;white-space:nowrap}
table.tbl td{padding:14px 18px;border-top:1px solid var(--line);color:#38415a;vertical-align:top}
table.tbl tr:nth-child(even) td{background:#f8fafd}
table.tbl td.strong{color:var(--navy-deep);font-weight:600;white-space:nowrap}
table.tbl td .price{font-family:var(--serif);font-size:18px;font-weight:700;color:var(--red)}

/* symposia */
.sym-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.sym-card{background:#fff;border:1px solid var(--line);border-top:4px solid var(--sc,var(--navy));border-radius:14px;box-shadow:var(--shadow);padding:26px 28px}
.sym-head{display:flex;align-items:center;gap:16px;margin-bottom:12px}
.sym-badge{flex:none;width:52px;height:52px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-family:var(--serif);font-size:28px;font-weight:800;color:#fff;background:var(--sc,var(--navy))}
.sym-head h3{font-family:var(--serif);font-size:21px;color:var(--navy-deep);line-height:1.3}
.sym-head .en-name{display:block;font-size:12px;letter-spacing:.08em;color:var(--muted);text-transform:uppercase;font-family:var(--sans)}
.sym-chairs{font-size:14px;color:#38415a;margin-bottom:14px;padding-bottom:12px;border-bottom:1px dashed var(--line)}
.sym-chairs b{color:var(--navy)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chips span{background:color-mix(in srgb,var(--sc,var(--navy)) 8%,#fff);border:1px solid color-mix(in srgb,var(--sc,var(--navy)) 26%,#fff);color:color-mix(in srgb,var(--sc,var(--navy)) 82%,#000);border-radius:999px;padding:4px 13px;font-size:13px}

/* registration */
.reg-grid{display:grid;grid-template-columns:1.25fr .9fr;gap:24px;margin-top:24px;align-items:start}
.qr-row{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.qr-card{text-align:center}
.qr-card img{width:200px;height:auto;margin:6px auto 12px;border:1px solid var(--line);border-radius:12px;padding:10px;background:#fff}
.qr-card .cap{font-size:13.5px;color:var(--muted)}
.pay-list{font-size:14.5px;color:#38415a}
.pay-list li{padding:7px 0;border-bottom:1px dashed var(--line);display:flex;gap:10px}
.pay-list li:last-child{border-bottom:none}
.pay-list b{flex:none;color:var(--navy-deep);min-width:74px}
.note-box{margin-top:16px;background:#fdf6f0;border:1px solid #f3ddc9;border-radius:10px;padding:12px 16px;font-size:13.5px;color:#8a5a2a}
.info-box{margin-top:16px;background:var(--blue-soft);border:1px solid rgba(23,53,127,.14);border-radius:10px;padding:12px 16px;font-size:13.5px;color:#31456f}

/* submission */
.sub-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.list-check li{position:relative;padding:8px 0 8px 28px;font-size:15px;color:#38415a;border-bottom:1px dashed var(--line)}
.list-check li:last-child{border-bottom:none}
.list-check li::before{content:"✓";position:absolute;left:2px;top:8px;width:18px;height:18px;border-radius:50%;background:var(--blue-soft);color:var(--navy);font-size:12px;display:flex;align-items:center;justify-content:center;font-weight:700}
.list-check li.red::before{content:"★";background:#fbecec;color:var(--red)}

/* venue */
.venue-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:24px;align-items:start}
.hotel-photos{display:grid;gap:16px}
.hotel-photos img{border-radius:12px;box-shadow:var(--shadow);width:100%}
.route-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:24px}
.route-card{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);padding:22px}
.route-card h4{font-size:16px;color:var(--navy-deep);margin-bottom:10px;display:flex;align-items:center;gap:8px}
.route-card .ic{font-size:20px}
.route-card p{font-size:13.8px;color:#4a5470;margin-bottom:8px;padding-left:2px}
.route-card p b{color:var(--navy)}

/* organization */
.org-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.org-card ul li{padding:7px 0 7px 20px;position:relative;font-size:14.8px;color:#38415a;line-height:1.6}
.org-card ul li::before{content:"";position:absolute;left:4px;top:16px;width:6px;height:6px;border-radius:50%;background:var(--red)}
.lead-rows{display:grid;gap:0}
.lead-row{display:flex;gap:16px;padding:14px 2px;border-bottom:1px dashed var(--line);align-items:baseline}
.lead-row:last-child{border-bottom:none}
.lead-row dt{flex:none;width:120px;font-weight:700;color:var(--navy);font-size:15px}
.lead-row dd{font-size:14.6px;color:#38415a}
.member-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:10px;margin-top:8px}
.member{background:#fff;border:1px solid var(--line);border-radius:10px;padding:9px 14px;font-size:14px;line-height:1.45}
.member b{color:var(--navy-deep)}
.member small{display:block;color:var(--muted);font-size:12.3px}
.roster-note{font-size:12.8px;color:var(--muted);margin:10px 2px 0}

/* contact */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.contact-card{text-align:center;padding:30px 22px}
.contact-card .ic{width:54px;height:54px;margin:0 auto 14px;border-radius:50%;background:var(--blue-soft);display:flex;align-items:center;justify-content:center;font-size:24px}
.contact-card h4{font-size:15.5px;color:var(--navy-deep);margin-bottom:6px}
.contact-card .who{font-size:14.5px;color:#38415a;margin-bottom:2px}
.contact-card a.tel{font-family:var(--serif);font-size:17px;color:var(--red);font-weight:700}
.contact-card .mail{font-size:14.5px;word-break:break-all}
.dl-row{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin-top:34px}
.dl-btn{display:inline-flex;align-items:center;gap:9px;background:#fff;border:1.5px solid var(--line);border-radius:12px;padding:12px 20px;font-size:14.5px;color:var(--navy-deep);font-weight:600;box-shadow:var(--shadow);transition:border-color .15s,transform .15s}
.dl-btn:hover{border-color:var(--navy);transform:translateY(-2px)}
.dl-btn .ext{font-size:11px;color:var(--muted);font-weight:400}

/* footer */
.site-footer{background:var(--navy-deep);color:rgba(255,255,255,.85);padding:52px 0 30px;margin-top:0}
.footer-top{display:flex;align-items:center;justify-content:center;gap:26px;margin-bottom:26px}
.footer-top img{width:60px;height:60px;background:#fff;border-radius:50%;padding:5px}
.footer-name{text-align:center;font-family:var(--serif);font-size:20px;color:#fff;margin-bottom:8px}
.footer-lines{text-align:center;font-size:13.5px;line-height:2;color:rgba(255,255,255,.72)}
.footer-lines a{color:#9db8f0}
.footer-bar{margin-top:30px;padding-top:18px;border-top:1px solid rgba(255,255,255,.14);text-align:center;font-size:12px;color:rgba(255,255,255,.5)}

/* back to top */
#toTop{position:fixed;right:26px;bottom:30px;width:44px;height:44px;border-radius:50%;background:var(--navy);color:#fff;border:none;font-size:18px;cursor:pointer;opacity:0;pointer-events:none;transition:opacity .25s,transform .25s;box-shadow:0 8px 20px rgba(14,34,88,.35);z-index:90}
#toTop.show{opacity:1;pointer-events:auto}
#toTop:hover{transform:translateY(-3px)}

/* ===== responsive ===== */
@media (max-width:1080px){
  .main-nav{position:fixed;top:68px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:10px 18px 16px;gap:2px;display:none;box-shadow:0 18px 30px rgba(14,34,88,.12)}
  .main-nav.open{display:flex}
  .main-nav a{padding:11px 10px;font-size:15px;border-bottom:1px solid #f0f3f9}
  .nav-toggle{display:block}
  .lang-btn{margin-left:auto}
  .nav-toggle{margin-left:0}
}
@media (max-width:900px){
  .about-grid,.sym-grid,.reg-grid,.sub-grid,.venue-grid,.org-grid{grid-template-columns:1fr}
  .route-grid,.contact-grid{grid-template-columns:1fr}
  .hero h1{font-size:31px}
  .hero .wordmark{font-size:44px}
  .hero{padding-top:130px}
  .brand-text strong{font-size:13.5px;max-width:52vw}
  .brand-text small{max-width:52vw}
  .section{padding:56px 0}
  .cd-chip{min-width:64px}
  .cd-chip b{font-size:22px}
  .qr-row{grid-template-columns:1fr}
}