/* ============================================================
   Golden Sincere Group 官网样式
   主题：金 + 深蓝（贴合 "Golden / 金诚" 品牌意象）
   修改品牌色：改下面 :root 里的 --gold / --navy 即可
   ============================================================ */
:root{
  --gold:#C8A24B;
  --gold-dark:#a9852f;
  --navy:#15203a;
  --navy-2:#1d2c4d;
  --ink:#1f2430;
  --muted:#6b7280;
  --bg:#ffffff;
  --bg-alt:#f6f7fb;
  --line:#e6e8ef;
  --radius:14px;
  --shadow:0 10px 30px rgba(20,30,60,.08);
  --maxw:1140px;
}

/* 双语切换：默认中文显示，英文隐藏；body.lang-en 反之 */
.zh{display:inline}
.en{display:none}
body.lang-en .zh{display:none}
body.lang-en .en{display:inline}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Segoe UI",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.65;
}
a{color:inherit;text-decoration:none}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.9);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;flex-direction:column;line-height:1.1}
.brand-cn{font-weight:800;font-size:20px;color:var(--navy);letter-spacing:1px}
.brand-en{font-size:10px;color:var(--gold-dark);letter-spacing:2px}
.nav{display:flex;align-items:center;gap:26px}
.nav a{font-weight:600;color:var(--navy);font-size:15px;position:relative}
.nav a:hover{color:var(--gold-dark)}
.lang-toggle{
  border:1px solid var(--gold);color:var(--gold-dark);
  background:#fff;border-radius:999px;padding:6px 14px;font-weight:700;cursor:pointer;font-size:13px
}
.lang-toggle:hover{background:var(--gold);color:#fff}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer}
.hamburger span{width:24px;height:2px;background:var(--navy)}

/* ---------- Hero ---------- */
.hero{position:relative;color:#fff;min-height:78vh;display:flex;align-items:center;overflow:hidden}
.hero-overlay{position:absolute;inset:0;background:
  linear-gradient(120deg,rgba(21,32,58,.92),rgba(21,32,58,.55)),
  radial-gradient(1200px 600px at 80% -10%,rgba(200,162,75,.45),transparent);
}
.hero-inner{position:relative;z-index:2;padding:60px 0}
.eyebrow{color:var(--gold);font-weight:700;letter-spacing:3px;text-transform:uppercase;font-size:13px;margin-bottom:14px}
.hero h1{font-size:clamp(30px,5vw,56px);line-height:1.15;font-weight:800;margin-bottom:18px}
.hero-sub{font-size:clamp(15px,2vw,19px);max-width:640px;color:#e8ecf6;margin-bottom:30px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 26px;border-radius:999px;font-weight:700;font-size:15px;cursor:pointer;border:0}
.btn-primary{background:var(--gold);color:#1a1300}
.btn-primary:hover{background:var(--gold-dark)}
.btn-ghost{border:1.5px solid rgba(255,255,255,.7);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}

/* ---------- 通用 section ---------- */
.section{padding:84px 0}
.section-alt{background:var(--bg-alt)}
.section-title{font-size:clamp(24px,3vw,36px);font-weight:800;color:var(--navy);text-align:center;margin-bottom:14px}
.section-title.left{text-align:left}
.section-lead{max-width:760px;margin:0 auto 44px;text-align:center;color:var(--muted);font-size:16px}
.section-alt .section-lead{margin-bottom:44px}

/* ---------- 数据统计 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:40px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 18px;text-align:center;box-shadow:var(--shadow)}
.stat-num{font-size:34px;font-weight:800;color:var(--gold-dark)}
.stat-label{color:var(--muted);font-size:14px;margin-top:6px}

/* ---------- 卡片网格 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card-grid.three{grid-template-columns:repeat(3,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(20,30,60,.12)}
.card h3{font-size:18px;color:var(--navy);margin:14px 0 8px}
.card p{color:var(--muted);font-size:14.5px}
.link-more{display:inline-block;margin-top:10px;color:var(--gold-dark);font-weight:700;font-size:14px}

/* 图片占位块 */
.ph-img{width:100%;height:160px;border-radius:10px;
  background:repeating-linear-gradient(45deg,#eef0f6,#eef0f6 12px,#e3e7f0 12px,#e3e7f0 24px);
  display:flex;align-items:center;justify-content:center;color:#9aa3b2;font-size:13px;text-align:center;padding:10px}
.ph-img.tall{height:200px}

/* ---------- 优势 ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.feature{text-align:center;padding:10px}
.feature-icon{width:54px;height:54px;margin:0 auto 14px;border-radius:50%;background:var(--gold);color:#fff;display:flex;align-items:center;justify-content:center;font-size:24px;font-weight:800}
.feature h3{color:var(--navy);font-size:17px;margin-bottom:6px}
.feature p{color:var(--muted);font-size:14px}

/* ---------- 联系 ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:start}
.info-list{list-style:none;margin-top:18px}
.info-list li{padding:10px 0;border-bottom:1px dashed var(--line);font-size:15px}
.info-list strong{color:var(--navy)}
.contact-form{display:flex;flex-direction:column;gap:12px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.contact-form input,.contact-form textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit}
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--gold)}
.form-note{font-size:12.5px;color:var(--muted);margin-top:2px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--navy);color:#cfd6e6;padding:48px 0 22px}
.footer-inner{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap}
.footer-brand .brand-cn{color:#fff;font-size:20px}
.footer-brand .brand-en{color:var(--gold);font-size:11px;letter-spacing:2px;display:block;margin-bottom:8px}
.footer-brand p{color:#9aa6bd;font-size:13.5px;max-width:320px;margin-top:6px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{color:#cfd6e6;font-size:14.5px}
.footer-links a:hover{color:var(--gold)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:30px;padding-top:16px;font-size:13px;color:#8b97b0;text-align:center}

/* ---------- 响应式 ---------- */
@media (max-width:880px){
  .nav{position:fixed;top:68px;right:0;height:calc(100vh - 68px);width:240px;flex-direction:column;
    align-items:flex-start;gap:18px;background:#fff;padding:24px;box-shadow:-10px 0 30px rgba(0,0,0,.08);
    transform:translateX(110%);transition:transform .25s;z-index:40}
  .nav.open{transform:translateX(0)}
  .hamburger{display:flex}
  .stats,.feature-grid{grid-template-columns:repeat(2,1fr)}
  .card-grid,.card-grid.three{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr;gap:28px}
}
@media (max-width:480px){
  .stats{grid-template-columns:1fr 1fr}
}