/* ==========================================================================
   展艺会务 Art Expo | Design System
   深蓝 + 红 · 现代 · 稳重 · 响应式 · 无外部依赖（适配中国网络）
   ========================================================================== */

:root{
  --navy:#0f2a4a;
  --navy-700:#123458;
  --navy-800:#0a1f38;
  --navy-900:#071628;
  --red:#c8102e;
  --red-600:#a70d26;
  --ink:#16202e;
  --muted:#5a6b7f;
  --line:#e4e9f0;
  --bg:#ffffff;
  --bg-alt:#f4f7fb;
  --bg-soft:#eef3f9;
  --gold:#c9a24b;
  --radius:14px;
  --radius-sm:9px;
  --shadow:0 10px 30px rgba(15,42,74,.08);
  --shadow-lg:0 24px 60px rgba(15,42,74,.14);
  --maxw:1180px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
          "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);
  line-height:1.75;font-size:16.5px;-webkit-font-smoothing:antialiased;letter-spacing:.01em;
}
img{max-width:100%;display:block}
a{color:var(--navy);text-decoration:none;transition:color .18s}
a:hover{color:var(--red)}
h1,h2,h3,h4{line-height:1.3;color:var(--navy);margin:0 0 .6em;font-weight:700;letter-spacing:.01em}
h1{font-size:clamp(1.9rem,4vw,3rem)}
h2{font-size:clamp(1.5rem,3vw,2.15rem)}
h3{font-size:1.28rem}
p{margin:0 0 1.1em}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.section{padding:74px 0}
.section--alt{background:var(--bg-alt)}
.section--soft{background:var(--bg-soft)}
.section--navy{background:var(--navy);color:#eaf1fa}
.section--navy h2,.section--navy h3{color:#fff}
.center{text-align:center}
.lead{font-size:1.12rem;color:var(--muted);max-width:760px}
.center .lead{margin-left:auto;margin-right:auto}
.eyebrow{display:inline-block;font-size:.82rem;font-weight:700;letter-spacing:.22em;
  text-transform:uppercase;color:var(--red);margin-bottom:.7em}
.section--navy .eyebrow{color:var(--gold)}
.muted{color:var(--muted)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:.5em;padding:.85em 1.6em;border-radius:999px;
  font-weight:700;font-size:.98rem;cursor:pointer;border:2px solid transparent;transition:.2s;white-space:nowrap}
.btn-primary{background:var(--red);color:#fff;border-color:var(--red)}
.btn-primary:hover{background:var(--red-600);border-color:var(--red-600);color:#fff;transform:translateY(-2px)}
.btn-navy{background:var(--navy);color:#fff;border-color:var(--navy)}
.btn-navy:hover{background:var(--navy-800);color:#fff;transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--navy);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--navy);color:var(--navy)}
.btn-light{background:#fff;color:var(--navy);border-color:#fff}
.btn-light:hover{background:#eaf1fa;color:var(--navy)}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn-outline-light:hover{background:#fff;color:var(--navy)}
.btn-row{display:flex;flex-wrap:wrap;gap:14px}
.center .btn-row{justify-content:center}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);
  backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--line)}
.topbar{background:var(--navy-800);color:#c8d6e8;font-size:.82rem}
.topbar .container{display:flex;justify-content:space-between;align-items:center;gap:14px;padding-top:7px;padding-bottom:7px;flex-wrap:wrap}
.topbar a{color:#c8d6e8}.topbar a:hover{color:#fff}
.topbar .tb-right{display:flex;gap:18px;flex-wrap:wrap}
.navbar{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px 0}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;color:var(--navy);font-size:1.28rem;letter-spacing:.04em}
.brand .logo{height:46px;width:auto;flex:0 0 auto;border-radius:7px;box-shadow:0 2px 8px rgba(15,42,74,.18)}
.brand small{display:block;font-size:.6rem;letter-spacing:.32em;color:var(--muted);font-weight:600;margin-top:2px}
.nav{display:flex;align-items:center;gap:4px}
.nav > ul{display:flex;list-style:none;margin:0;padding:0;gap:2px;align-items:center}
.nav li{position:relative}
.nav > ul > li > a{display:block;padding:12px 15px;font-weight:600;color:var(--ink);border-radius:8px;font-size:.98rem}
.nav > ul > li > a:hover,.nav li.has-dd:hover > a{background:var(--bg-alt);color:var(--navy)}
.nav .has-dd > a::after{content:"";display:inline-block;width:.42em;height:.42em;margin-left:.5em;
  border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:rotate(45deg) translateY(-2px)}
.dropdown{position:absolute;top:calc(100% + 6px);left:0;min-width:250px;background:#fff;
  border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow-lg);padding:8px;
  opacity:0;visibility:hidden;transform:translateY(8px);transition:.18s;list-style:none;margin:0}
.dropdown.dd-wide{min-width:520px;display:grid;grid-template-columns:1fr 1fr;gap:2px}
.nav li.has-dd:hover .dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown a{display:block;padding:10px 13px;border-radius:8px;color:var(--ink);font-weight:600;font-size:.94rem}
.dropdown a small{display:block;font-weight:400;color:var(--muted);font-size:.8rem;margin-top:1px}
.dropdown a:hover{background:var(--bg-alt);color:var(--red)}
.nav-cta{margin-left:8px}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.hamburger span{width:26px;height:2.5px;background:var(--navy);border-radius:2px;transition:.2s}

/* ---------- hero ---------- */
.hero{position:relative;background:linear-gradient(120deg,var(--navy-900),var(--navy) 55%,var(--navy-700));
  color:#fff;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;opacity:.5;
  background:radial-gradient(circle at 82% 18%,rgba(200,16,46,.32),transparent 42%),
             radial-gradient(circle at 12% 88%,rgba(201,162,75,.18),transparent 38%)}
.hero::after{content:"";position:absolute;inset:0;opacity:.06;
  background-image:linear-gradient(#fff 1px,transparent 1px),linear-gradient(90deg,#fff 1px,transparent 1px);
  background-size:46px 46px}
.hero .container{position:relative;z-index:2;padding-top:86px;padding-bottom:90px}
.hero h1{color:#fff;max-width:16em}
.hero .lead{color:#cfe0f2;max-width:40em;font-size:1.18rem}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin:26px 0 30px}
.hero-badges span{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);
  padding:7px 15px;border-radius:999px;font-size:.9rem;color:#eaf1fa}
.page-hero{background:linear-gradient(120deg,var(--navy-900),var(--navy-700));color:#fff;position:relative;overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;opacity:.5;
  background:radial-gradient(circle at 88% 12%,rgba(200,16,46,.30),transparent 45%)}
.page-hero .container{position:relative;z-index:2;padding-top:58px;padding-bottom:60px}
.page-hero h1{color:#fff;margin-bottom:.35em}
.page-hero .lead{color:#cfe0f2}
.breadcrumb{font-size:.86rem;color:#a9c0da;margin-bottom:16px}
.breadcrumb a{color:#a9c0da}.breadcrumb a:hover{color:#fff}
.breadcrumb span{margin:0 .5em;opacity:.6}

/* ---------- stats ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat{text-align:center;padding:24px 12px}
.stat .num{font-size:2.6rem;font-weight:800;color:var(--navy);line-height:1}
.section--navy .stat .num,.hero .stat .num{color:#fff}
.stat .num i{font-style:normal;color:var(--red)}
.section--navy .stat .num i{color:var(--gold)}
.stat .lbl{margin-top:8px;color:var(--muted);font-size:.96rem}
.section--navy .stat .lbl{color:#b9cbe0}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:6px;
  border-top:1px solid rgba(255,255,255,.16);padding-top:26px}
.hero-stats .num{color:#fff}.hero-stats .lbl{color:#bcd0e8}

/* ---------- grids & cards ---------- */
.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;
  box-shadow:var(--shadow);transition:.22s;height:100%}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#cdd9e8}
.card .ico{width:52px;height:52px;border-radius:12px;background:linear-gradient(135deg,var(--navy),var(--navy-700));
  display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.card .ico svg{width:26px;height:26px;stroke:#fff}
.card h3{margin-bottom:.5em}
.card p{color:var(--muted);margin-bottom:.8em;font-size:.98rem}
.card .more{font-weight:700;color:var(--red);font-size:.94rem}
.card .more::after{content:" →"}
a.card{color:inherit;display:block}

.city-card{position:relative;border-radius:var(--radius);overflow:hidden;min-height:210px;
  display:flex;flex-direction:column;justify-content:flex-end;padding:22px;color:#fff;
  background:linear-gradient(160deg,var(--navy-700),var(--navy-900));box-shadow:var(--shadow);transition:.22s}
.city-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);color:#fff}
.city-card::before{content:"";position:absolute;inset:0;opacity:.16;
  background:radial-gradient(circle at 75% 20%,var(--red),transparent 55%)}
.city-card .flag{position:relative;font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--gold);margin-bottom:6px}
.city-card h3{position:relative;color:#fff;margin:0 0 4px;font-size:1.35rem}
.city-card p{position:relative;color:#c9d8ea;margin:0;font-size:.9rem}
.city-card .en{position:relative;color:#8ea6c2;font-size:.8rem;letter-spacing:.05em}

/* ---------- feature list ---------- */
.feat{display:flex;gap:16px;align-items:flex-start}
.feat .fico{flex:0 0 auto;width:44px;height:44px;border-radius:11px;background:var(--bg-alt);
  display:flex;align-items:center;justify-content:center;border:1px solid var(--line)}
.feat .fico svg{width:22px;height:22px;stroke:var(--red)}
.feat h3{font-size:1.12rem;margin-bottom:.25em}
.feat p{color:var(--muted);font-size:.96rem;margin:0}
.checklist{list-style:none;padding:0;margin:0}
.checklist li{position:relative;padding:8px 0 8px 32px;border-bottom:1px solid var(--line)}
.checklist li::before{content:"";position:absolute;left:2px;top:15px;width:16px;height:9px;
  border-left:2.5px solid var(--red);border-bottom:2.5px solid var(--red);transform:rotate(-45deg)}
.checklist li:last-child{border-bottom:0}

/* ---------- split ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split .visual{border-radius:var(--radius);min-height:360px;background:linear-gradient(150deg,var(--navy),var(--navy-800));
  position:relative;overflow:hidden;box-shadow:var(--shadow-lg)}
.split .visual::after{content:"";position:absolute;inset:0;opacity:.5;
  background:radial-gradient(circle at 70% 30%,rgba(200,16,46,.4),transparent 50%),
  linear-gradient(#ffffff14 1px,transparent 1px),linear-gradient(90deg,#ffffff14 1px,transparent 1px);
  background-size:auto,40px 40px,40px 40px}
.visual .visual-label{position:absolute;left:26px;bottom:24px;z-index:2;color:#fff}
.visual .visual-label b{font-size:1.4rem;display:block}
.visual .visual-label span{color:#bcd0e8;font-size:.9rem}

/* ---------- table ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
table.data{width:100%;border-collapse:collapse;min-width:520px;background:#fff}
table.data th,table.data td{padding:13px 18px;text-align:left;border-bottom:1px solid var(--line);font-size:.96rem}
table.data thead th{background:var(--navy);color:#fff;font-weight:600;letter-spacing:.04em}
table.data tbody tr:hover{background:var(--bg-alt)}
table.data td .tag{display:inline-block;background:var(--bg-soft);color:var(--navy);border-radius:6px;
  padding:2px 9px;font-size:.82rem;font-weight:600}

/* ---------- FAQ ---------- */
.faq details{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);margin-bottom:14px;overflow:hidden}
.faq summary{list-style:none;cursor:pointer;padding:18px 54px 18px 22px;font-weight:700;color:var(--navy);position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);
  font-size:1.5rem;color:var(--red);font-weight:400;transition:.2s}
.faq details[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.faq details[open] summary{border-bottom:1px solid var(--line)}
.faq .ans{padding:16px 22px 4px;color:var(--muted)}
.faq .ans p:last-child{margin-bottom:1em}

/* ---------- CTA band ---------- */
.cta-band{background:linear-gradient(120deg,var(--navy-900),var(--navy) 60%,var(--red-600));color:#fff;text-align:center}
.cta-band .container{padding-top:64px;padding-bottom:64px}
.cta-band h2{color:#fff}
.cta-band p{color:#d8e4f2;max-width:640px;margin:0 auto 26px}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px}
.info-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);margin-bottom:22px}
.info-card h3{margin-bottom:.6em}
.info-row{display:flex;gap:14px;padding:11px 0;border-bottom:1px solid var(--line);align-items:flex-start}
.info-row:last-child{border-bottom:0}
.info-row .k{flex:0 0 88px;color:var(--muted);font-size:.92rem}
.info-row .v{font-weight:600;color:var(--ink)}
.info-row .v small{display:block;font-weight:400;color:var(--muted)}
form .fld{margin-bottom:16px}
form label{display:block;font-weight:600;font-size:.92rem;margin-bottom:6px;color:var(--navy)}
form input,form select,form textarea{width:100%;padding:12px 14px;border:1.5px solid var(--line);
  border-radius:9px;font-family:inherit;font-size:.98rem;background:#fff;color:var(--ink)}
form input:focus,form select:focus,form textarea:focus{outline:none;border-color:var(--navy)}
form .row2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.qr-box{text-align:center;background:var(--bg-alt);border:1px dashed var(--navy);border-radius:12px;padding:20px}
.qr-box img{width:150px;height:150px;margin:0 auto 10px;border-radius:8px;background:#fff}

/* ---------- prose (articles) ---------- */
.prose{max-width:800px;margin:0 auto}
.prose h2{margin-top:1.6em}
.prose h3{margin-top:1.4em;color:var(--navy-700)}
.prose ul,.prose ol{padding-left:1.3em;margin:0 0 1.2em}
.prose li{margin-bottom:.5em}
.prose blockquote{margin:1.4em 0;padding:14px 22px;border-left:4px solid var(--red);
  background:var(--bg-alt);border-radius:0 10px 10px 0;color:var(--navy-700)}
.prose .toc{background:var(--bg-alt);border:1px solid var(--line);border-radius:12px;padding:20px 26px;margin-bottom:30px}
.prose .toc h4{margin:0 0 .5em;color:var(--navy)}
.prose .toc ol{margin:0;padding-left:1.2em}

/* ---------- misc ---------- */
.pill-row{display:flex;flex-wrap:wrap;gap:10px}
.pill{background:var(--bg-alt);border:1px solid var(--line);border-radius:999px;padding:8px 16px;font-size:.9rem;font-weight:600;color:var(--navy)}
.divider{height:1px;background:var(--line);margin:0}
.note{background:#fff6f7;border:1px solid #f3c9cf;border-left:4px solid var(--red);border-radius:0 10px 10px 0;padding:14px 20px;color:var(--navy-700);font-size:.95rem;margin:1.2em 0}

/* ---------- footer ---------- */
.site-footer{background:var(--navy-900);color:#a9bdd4;font-size:.92rem;padding-top:60px}
.site-footer h4{color:#fff;font-size:1rem;letter-spacing:.05em;margin-bottom:1.1em}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:44px}
.site-footer a{color:#a9bdd4}.site-footer a:hover{color:#fff}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:9px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:1.2rem;margin-bottom:14px}
.footer-brand .logo{height:40px;width:auto;border-radius:6px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;display:flex;
  justify-content:space-between;gap:14px;flex-wrap:wrap;color:#7f95af;font-size:.85rem}
.footer-bottom a{color:#7f95af}
.wechat-inline{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.14);border-radius:10px;padding:10px 14px;color:#dbe7f4}

/* ---------- responsive ---------- */
@media(max-width:960px){
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:30px}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:20px}
}
@media(max-width:760px){
  .section{padding:52px 0}
  .hamburger{display:flex}
  .nav{position:fixed;inset:64px 0 auto 0;background:#fff;border-bottom:1px solid var(--line);
    box-shadow:var(--shadow-lg);flex-direction:column;align-items:stretch;padding:12px;gap:0;
    max-height:calc(100vh - 64px);overflow-y:auto;transform:translateY(-140%);transition:transform .28s;visibility:hidden}
  .nav.open{transform:translateY(0);visibility:visible}
  .nav > ul{flex-direction:column;align-items:stretch;gap:0;width:100%}
  .nav > ul > li > a{padding:14px 12px;border-radius:8px}
  .nav .has-dd > a::after{float:right;margin-top:8px}
  .dropdown,.dropdown.dd-wide{position:static;opacity:1;visibility:visible;transform:none;
    box-shadow:none;border:0;border-radius:0;padding:2px 2px 8px 14px;display:none;min-width:0;grid-template-columns:1fr}
  .nav li.has-dd.open-sub .dropdown{display:block}
  .nav-cta{margin:8px 0 4px}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr}
  .form .row2,form .row2{grid-template-columns:1fr}
  .topbar .tb-left{display:none}
}

/* ---------- photo hero (city pages) ---------- */
.page-hero.has-photo::before{display:none}
.page-hero.has-photo .container{padding-top:70px;padding-bottom:72px}

/* ---------- image helpers ---------- */
.imgfig{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-lg);margin:0;line-height:0}
.imgfig img{width:100%;height:100%;object-fit:cover;display:block}
.split .visual.photo{background:none;min-height:380px}
.split .visual.photo::after{display:none}
.split .visual.photo img{width:100%;height:100%;min-height:380px;object-fit:cover;border-radius:var(--radius)}

/* ---------- gallery ---------- */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.gallery figure{position:relative;margin:0;border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow);aspect-ratio:4/3;background:var(--navy)}
.gallery figure img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .5s}
.gallery figure:hover img{transform:scale(1.06)}
.gallery figcaption{position:absolute;left:0;right:0;bottom:0;padding:26px 16px 12px;color:#fff;
  font-size:.9rem;font-weight:600;background:linear-gradient(transparent,rgba(7,22,40,.85))}
.gallery figcaption span{display:block;font-weight:400;font-size:.78rem;color:#c9d8ea;margin-top:2px}
.gallery.g2{grid-template-columns:repeat(2,1fr)}
.gallery.g4{grid-template-columns:repeat(4,1fr)}
.gallery-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.gallery-strip figure{margin:0;border-radius:12px;overflow:hidden;aspect-ratio:1/1;box-shadow:var(--shadow)}
.gallery-strip img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .5s}
.gallery-strip figure:hover img{transform:scale(1.06)}

/* city thumb row */
.citythumbs{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.citythumbs figure{margin:0;border-radius:12px;overflow:hidden;aspect-ratio:16/10;box-shadow:var(--shadow)}
.citythumbs img{width:100%;height:100%;object-fit:cover;display:block}

@media(max-width:960px){
  .gallery,.citythumbs{grid-template-columns:repeat(2,1fr)}
  .gallery-strip{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:600px){
  .gallery,.citythumbs,.gallery.g4{grid-template-columns:1fr 1fr}
}