/* ============================================================
   Suzhou Jiayuan Spring — English site styles
   Shared by all /en/ pages
============================================================ */
:root{
  --navy:#0a2647;
  --navy-2:#0f3a66;
  --steel:#1e6091;
  --sky:#5dade2;
  --accent:#ef9718;
  --accent-2:#ffbb4d;
  --ink:#12263c;
  --text:#20344b;
  --muted:#5b6f89;
  --bg:#f4f7fb;
  --card:#ffffff;
  --line:#dde6f1;
  --ok:#15a34a;
  --sh:0 14px 34px rgba(12,38,63,.10);
  --sh-lg:0 28px 60px rgba(12,38,63,.18);
  --wrap:1160px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:"Segoe UI",-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,sans-serif;
  color:var(--text);font-size:16px;line-height:1.75;background:var(--bg);
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{width:min(var(--wrap),100% - 40px);margin-inline:auto}

/* ---------- header ---------- */
.site-head{
  position:sticky;top:0;z-index:1000;
  background:linear-gradient(135deg,rgba(10,38,71,.97),rgba(24,74,120,.94));
  -webkit-backdrop-filter:blur(14px) saturate(150%);
  backdrop-filter:blur(14px) saturate(150%);
  border-bottom:1px solid rgba(255,255,255,.10);
  box-shadow:0 8px 26px rgba(8,24,44,.28);
}
.head-inner{
  width:min(var(--wrap),100% - 32px);margin-inline:auto;
  padding:10px 0;display:flex;align-items:center;gap:10px;flex-wrap:wrap;
}
.brand{display:flex;align-items:center;gap:10px;color:#fff;margin-right:auto}
.brand svg{width:38px;height:38px;flex:none;filter:drop-shadow(0 2px 6px rgba(0,0,0,.32))}
.brand b{font-size:16px;letter-spacing:1.4px;display:block;line-height:1.25}
.brand small{font-size:9.5px;opacity:.72;letter-spacing:1.4px;display:block}
.head-nav{display:flex;gap:2px;align-items:center;flex-wrap:wrap}
.head-nav a{
  color:#d7e6f8;font-size:13.5px;padding:7px 11px;border-radius:9px;
  position:relative;white-space:nowrap;transition:background .18s,color .18s;
}
.head-nav a:hover{background:rgba(255,255,255,.13);color:#fff}
.head-nav a.active{background:rgba(255,255,255,.16);color:#fff;font-weight:700}
.lang-link{
  border:1px solid rgba(255,255,255,.45);border-radius:999px;
  font-weight:700;letter-spacing:.5px;padding:5px 12px!important;font-size:12.5px!important;
}
.head-tel{
  display:inline-flex;align-items:center;gap:6px;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:#fff;font-weight:700;font-size:13px;padding:7px 14px;border-radius:999px;
  box-shadow:0 6px 16px rgba(239,151,24,.42);white-space:nowrap;
}
.head-tel:hover{filter:brightness(1.08)}
.burger{display:none;width:40px;height:40px;border:1px solid rgba(255,255,255,.22);border-radius:10px;background:rgba(255,255,255,.10);cursor:pointer;flex-direction:column;justify-content:center;gap:5px}
.burger span{display:block;width:20px;height:2px;margin:0 auto;border-radius:2px;background:#e8f0fb;transition:transform .28s,opacity .2s}
.burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-menu{
  display:none;position:absolute;top:100%;left:0;right:0;
  background:linear-gradient(180deg,rgba(9,26,45,.99),rgba(14,44,78,.98));
  border-top:1px solid rgba(255,255,255,.10);box-shadow:0 16px 40px rgba(8,24,44,.45);
}
.mobile-menu.open{display:block}
.mobile-menu a{display:block;color:#d7e6f8;font-size:15px;padding:13px 20px;border-radius:0}
.mobile-menu a:hover{background:rgba(255,255,255,.10);color:#fff}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:
    radial-gradient(900px 420px at 82% 8%,rgba(93,173,226,.30),transparent 60%),
    radial-gradient(700px 380px at 8% 92%,rgba(239,151,24,.16),transparent 62%),
    linear-gradient(150deg,#061727 0%,#0a2647 46%,#144a7d 100%);
}
.hero-inner{
  width:min(var(--wrap),100% - 40px);margin-inline:auto;
  padding:74px 0 66px;display:grid;grid-template-columns:1.15fr .85fr;gap:46px;align-items:center;
}
.kicker{
  display:inline-block;font-size:12px;letter-spacing:2.4px;color:#bcd7f5;
  border:1px solid rgba(188,215,245,.4);padding:5px 14px;border-radius:999px;margin-bottom:18px;
}
.hero h1{font-size:42px;line-height:1.22;letter-spacing:-.3px;margin-bottom:16px}
.hero h1 em{font-style:normal;color:var(--accent-2);display:block}
.hero p{font-size:16.5px;color:#d8e6f6;max-width:640px;margin-bottom:26px}
.hero-btns{display:flex;gap:12px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:8px;border-radius:11px;
  padding:12px 24px;font-size:15px;font-weight:700;transition:transform .12s,filter .18s,background .18s;
  border:1px solid transparent;
}
.btn:active{transform:translateY(1px)}
.btn-main{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;box-shadow:0 8px 22px rgba(239,151,24,.36)}
.btn-main:hover{filter:brightness(1.06)}
.btn-ghost{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.42)}
.btn-ghost:hover{background:rgba(255,255,255,.22)}
.hero-fig{position:relative;border-radius:18px;overflow:hidden;box-shadow:var(--sh-lg);border:1px solid rgba(255,255,255,.16)}
.hero-fig img{width:100%;height:auto;object-fit:cover}
.hero-fig .tag{
  position:absolute;left:14px;top:14px;background:rgba(6,23,39,.72);color:#eaf3ff;
  font-size:11px;letter-spacing:1.6px;padding:5px 12px;border-radius:999px;
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
}
.hero-stats{display:flex;gap:30px;flex-wrap:wrap;margin-top:30px}
.hero-stats b{font-size:26px;color:var(--accent-2);display:block;line-height:1.2}
.hero-stats span{font-size:12.5px;color:#bcd0e4;letter-spacing:.4px}

/* ---------- sections ---------- */
main{padding:0 0 20px}
section{padding:66px 0}
section.alt{background:#fff;border-block:1px solid var(--line)}
.sec-head{margin-bottom:34px;max-width:760px}
.sec-label{
  display:inline-block;font-size:11.5px;letter-spacing:2.4px;color:var(--steel);
  font-weight:700;margin-bottom:10px;text-transform:uppercase;
}
.sec-head h2{font-size:31px;line-height:1.3;color:var(--navy);letter-spacing:-.2px;margin-bottom:10px}
.sec-head p{font-size:16px;color:var(--muted);max-width:70ch}

/* cards */
.grid{display:grid;gap:18px}
.grid.g3{grid-template-columns:repeat(3,1fr)}
.grid.g2{grid-template-columns:repeat(2,1fr)}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:16px;padding:26px;
  box-shadow:var(--sh);transition:transform .22s,box-shadow .22s,border-color .22s;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh-lg);border-color:#c2d6ea}
.card h3{font-size:19px;color:var(--navy);margin-bottom:8px;line-height:1.35}
.card p{font-size:14.5px;color:var(--muted);margin-bottom:14px}
.card .more{font-size:13.5px;font-weight:700;color:var(--steel);display:inline-flex;align-items:center;gap:6px}
.card .more:hover{color:var(--accent)}

/* tool cards */
.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.tool-card{
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px 20px 18px;
  display:flex;flex-direction:column;gap:8px;transition:transform .2s,box-shadow .2s,border-color .2s;
}
.tool-card:hover{transform:translateY(-3px);box-shadow:var(--sh);border-color:#c2d6ea}
.tool-card .t-kicker{font-size:10.5px;letter-spacing:1.8px;color:var(--steel);font-weight:700;text-transform:uppercase}
.tool-card h3{font-size:16.5px;color:var(--navy);line-height:1.35}
.tool-card p{font-size:13.5px;color:var(--muted);line-height:1.6;flex:1}
.tool-card .go{font-size:13px;font-weight:700;color:var(--accent)}

/* feature list */
.feature-list{list-style:none;display:grid;gap:12px}
.feature-list li{position:relative;padding-left:30px;font-size:15px;color:var(--text)}
.feature-list li::before{
  content:"";position:absolute;left:0;top:.45em;width:16px;height:16px;border-radius:50%;
  background:rgba(30,96,145,.10);
  border:2px solid var(--steel);
}

/* checklist / spec box */
.spec-box{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px;box-shadow:var(--sh)}
.spec-box h3{font-size:18px;color:var(--navy);margin-bottom:12px}
.spec-box ul{list-style:none;display:grid;gap:9px}
.spec-box li{font-size:14.5px;color:var(--text);padding-left:26px;position:relative}
.spec-box li::before{content:"✓";position:absolute;left:0;color:var(--ok);font-weight:800}

/* split */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:46px;align-items:center}
.split-fig{border-radius:16px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh);background:#fff}
.split-fig img{width:100%;height:auto}

/* prose (article pages) */
.prose{max-width:820px}
.prose h2{font-size:25px;color:var(--navy);margin:34px 0 12px;line-height:1.35}
.prose h3{font-size:19px;color:var(--navy);margin:24px 0 8px}
.prose p{margin-bottom:14px;color:var(--text)}
.prose ul,.prose ol{margin:0 0 16px 22px;color:var(--text)}
.prose li{margin-bottom:7px}
.prose .note{
  background:#fdf7ec;border:1px solid #f3e0bd;border-radius:12px;
  padding:14px 18px;font-size:14px;color:#7a5a12;margin:22px 0;
}
.prose a{color:var(--steel);font-weight:600;border-bottom:1px solid rgba(30,96,145,.3)}
.prose a:hover{color:var(--accent);border-color:rgba(239,151,24,.4)}

/* breadcrumb */
.crumb{font-size:12.5px;color:var(--muted);padding:18px 0 0}
.crumb a{color:var(--steel)}
.crumb span{opacity:.55;margin:0 6px}

/* CTA */
.cta{
  margin:0;padding:64px 0;
  background:
    radial-gradient(700px 300px at 85% 0%,rgba(93,173,226,.22),transparent 60%),
    linear-gradient(135deg,#071827,#0a2647 52%,#134576);
  color:#fff;
}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap}
.cta h2{font-size:29px;line-height:1.3;margin-bottom:8px}
.cta p{font-size:15.5px;color:#d3e2f3;max-width:620px}
.cta-btns{display:flex;gap:12px;flex-wrap:wrap}

/* faq */
.faq{display:grid;gap:10px;max-width:820px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.faq details[open]{border-color:#c2d6ea;box-shadow:var(--sh)}
.faq summary{cursor:pointer;font-weight:700;color:var(--navy);font-size:15.5px;padding:16px 52px 16px 20px;position:relative;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);font-size:20px;color:var(--steel);font-weight:700}
.faq details[open] summary::after{content:"−"}
.faq .a{padding:0 20px 18px;font-size:14.5px;color:var(--muted)}

/* related */
.related{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:8px}
.related a{
  background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 18px;
  font-size:14px;font-weight:700;color:var(--navy);display:flex;justify-content:space-between;gap:10px;
}
.related a:hover{border-color:#c2d6ea;color:var(--steel)}

/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:start}
.contact-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:30px;box-shadow:var(--sh)}
.contact-card h3{font-size:18px;color:var(--navy);margin-bottom:16px}
.contact-row{display:flex;gap:12px;padding:13px 0;border-top:1px solid var(--line);font-size:14.5px}
.contact-row:first-of-type{border-top:none}
.contact-row .k{width:96px;flex:none;color:var(--muted);font-size:12.5px;letter-spacing:1px;text-transform:uppercase;padding-top:2px}
.contact-row a{color:var(--steel);font-weight:700}
.qr-box{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px;text-align:center;box-shadow:var(--sh)}
.qr-box img{width:180px;height:180px;margin:0 auto 10px;border-radius:8px}
.qr-box p{font-size:13px;color:var(--muted)}

/* footer */
.site-foot{background:#061727;color:#9fb6ce;padding:44px 0 30px;font-size:13px;line-height:2}
.foot-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:30px;margin-bottom:26px}
.site-foot b{color:#e8f0fb;font-size:14px;letter-spacing:.5px}
.site-foot a{color:#a9c4de}
.site-foot a:hover{color:#fff}
.foot-links{display:flex;flex-wrap:wrap;gap:4px 14px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.10);padding-top:18px;font-size:12px;color:#7d94ab;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap}

/* back top */
.back-top{
  position:fixed;right:22px;bottom:26px;width:44px;height:44px;border-radius:50%;
  border:none;background:linear-gradient(135deg,var(--steel),var(--navy));color:#fff;
  box-shadow:0 10px 24px rgba(10,38,71,.34);cursor:pointer;font-size:20px;
  opacity:0;pointer-events:none;transition:opacity .25s;z-index:900;
}
.back-top.show{opacity:1;pointer-events:auto}

/* reveal */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s cubic-bezier(.16,1,.3,1),transform .6s cubic-bezier(.16,1,.3,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:980px){
  .hero-inner{grid-template-columns:1fr;padding:56px 0 50px;gap:30px}
  .hero h1{font-size:34px}
  .hero-fig{order:-1;max-width:540px}
  .tool-grid,.grid.g3,.related{grid-template-columns:repeat(2,1fr)}
  .split,.contact-grid,.foot-grid{grid-template-columns:1fr}
}
@media (max-width:720px){
  .head-nav{display:none}
  .burger{display:flex}
  .hero h1{font-size:28px}
  .hero p{font-size:15px}
  .tool-grid,.grid.g3,.grid.g2,.related{grid-template-columns:1fr}
  section{padding:48px 0}
  .sec-head h2{font-size:25px}
  .cta h2{font-size:23px}
  .hero-stats{gap:20px}
  .hero-stats b{font-size:22px}
  .prose h2{font-size:22px}
}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}