/* ============================================================
   Loonglink Global — 官网重做 共享样式
   现代企业风：品牌蓝主色 + 金色点缀，响应式
   ============================================================ */
:root{
  --primary:#004aad;      /* 品牌蓝(主,LOGO色) */
  --primary-dark:#003a8a;
  --accent:#f0a500;       /* 金(辅) */
  --accent-dark:#d18e00;
  --text:#1d2733;
  --text-light:#5b6b7c;
  --bg:#ffffff;
  --bg-soft:#f5f8fb;
  --line:#e3eaf1;
  --radius:12px;
  --shadow:0 8px 30px rgba(0,74,173,.10);
  --max:1180px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.65;font-size:16px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--max);margin:0 auto;padding:0 20px}

/* ---------- 顶部顶栏 ---------- */
.topbar{background:var(--primary-dark);color:#dbe7f2;font-size:13px;padding:7px 0}
.topbar .container{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}
.topbar a{color:#dbe7f2}
.topbar .lang a{margin-left:10px;padding:2px 8px;border:1px solid rgba(255,255,255,.25);border-radius:4px;font-size:12px}
.topbar .lang a:hover{border-color:var(--accent);color:var(--accent)}
.topbar .lang a.active{background:var(--accent);color:#003a8a;border-color:var(--accent);font-weight:600}

/* ---------- 导航 ---------- */
.header{position:sticky;top:0;z-index:100;background:#fff;box-shadow:0 2px 12px rgba(0,74,173,.06)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:12px}
.brand img{height:48px;width:auto}
.brand .brand-txt{line-height:1.15}
.brand .brand-name{font-size:19px;font-weight:800;color:var(--primary)}
.brand .brand-sub{font-size:12px;color:var(--text-light);letter-spacing:.5px}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{font-size:15px;font-weight:500;color:var(--text);position:relative;padding:6px 0}
.nav-links a:hover,.nav-links a.active{color:var(--primary)}
.nav-links a.active::after{content:"";position:absolute;left:0;bottom:0;width:100%;height:3px;background:var(--accent);border-radius:2px}
.nav-cta{margin-left:8px}
.btn{display:inline-block;padding:10px 22px;border-radius:8px;font-weight:600;font-size:15px;cursor:pointer;transition:.2s;border:none}
.btn-accent{background:var(--accent);color:#003a8a}
.btn-accent:hover{background:var(--accent-dark);transform:translateY(-1px)}
.btn-outline{border:2px solid var(--primary);color:var(--primary);background:transparent}
.btn-outline:hover{background:var(--primary);color:#fff}
.btn-white{background:#fff;color:var(--primary)}
.btn-white:hover{background:var(--bg-soft)}
.nav-toggle{display:none}

/* ---------- Hero ---------- */
.hero{position:relative;color:#fff;background-size:cover;background-position:center}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(100deg,rgba(0,58,138,.72) 0%,rgba(0,74,173,.35) 45%,rgba(0,74,173,.12) 100%)}
.hero .container{position:relative;padding:100px 20px 110px;max-width:var(--max)}
.hero-tag{display:inline-block;background:var(--accent);color:#003a8a;padding:5px 14px;border-radius:6px;font-size:13px;font-weight:700;letter-spacing:1px;margin-bottom:20px}
.hero h1{font-size:46px;line-height:1.2;font-weight:800;max-width:760px;margin-bottom:18px}
.hero h1 .hl{color:var(--accent)}
.hero-slogan{font-size:16px;font-weight:500;color:#fff;letter-spacing:1px;margin-bottom:16px;opacity:.95}
.hero p{font-size:18px;max-width:640px;opacity:.95;margin-bottom:30px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- 区块通用 ---------- */
.section{padding:80px 0}
.section-soft{background:var(--bg-soft)}
.section-head{text-align:center;max-width:720px;margin:0 auto 50px}
.section-eyebrow{color:var(--accent);font-weight:700;letter-spacing:2px;font-size:13px;text-transform:uppercase;margin-bottom:10px}
.section-head h2{font-size:34px;color:var(--primary);font-weight:800;margin-bottom:12px;line-height:1.25}
.section-head p{color:var(--text-light);font-size:16px}

/* ---------- 业务卡片 ---------- */
.services-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.service-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.25s;box-shadow:0 2px 10px rgba(0,74,173,.04);position:relative;display:block}
.service-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--primary)}
.service-card::after{content:'↗';position:absolute;right:20px;bottom:16px;font-size:16px;color:var(--primary);opacity:0;transform:translateX(-6px);transition:.25s}
.service-card:hover::after{opacity:1;transform:translateX(0)}
.service-card .icon{width:54px;height:54px;border-radius:12px;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:16px}
.service-card h3{font-size:18px;color:var(--primary);margin-bottom:8px}
.service-card p{font-size:14px;color:var(--text-light)}

/* ---------- 实拍区 ---------- */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.gallery .item{border-radius:var(--radius);overflow:hidden;position:relative;aspect-ratio:4/3}
.gallery .item img{width:100%;height:100%;object-fit:cover;transition:.4s}
.gallery .item:hover img{transform:scale(1.06)}
.gallery .item .cap{position:absolute;left:0;right:0;bottom:0;background:linear-gradient(transparent,rgba(0,58,138,.85));color:#fff;padding:30px 14px 12px;font-size:14px;font-weight:600}

/* ---------- 特点/优势 ---------- */
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.feature{text-align:center;padding:30px 20px}
.feature .num{font-size:40px;font-weight:800;color:var(--accent);line-height:1}
.feature h4{font-size:18px;color:var(--primary);margin:14px 0 8px}
.feature p{font-size:14px;color:var(--text-light)}

/* ---------- CTA 横幅 ---------- */
.cta{background:linear-gradient(120deg,var(--primary),var(--primary-dark));color:#fff;padding:64px 0;text-align:center}
.cta h2{font-size:32px;margin-bottom:14px;font-weight:800}
.cta p{opacity:.9;margin-bottom:28px;font-size:17px}
.cta .btn{font-size:16px;padding:14px 32px}

/* ---------- 页脚 ---------- */
.footer{background:var(--primary-dark);color:#b9cada;padding:56px 0 24px;font-size:14px}
.footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr 1.6fr;gap:36px;margin-bottom:36px}
.footer h4{color:#fff;font-size:16px;margin-bottom:16px}
.footer a{color:#b9cada}
.footer a:hover{color:var(--accent)}
.footer .brand-info img{height:44px;margin-bottom:14px}
.footer .brand-info p{margin-bottom:8px;max-width:320px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:20px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:12px;color:#8fa5b8}

/* ---------- 内页 Hero ---------- */
.page-hero{background:var(--primary);color:#fff;padding:56px 0;background-size:cover;background-blend-mode:multiply}
.page-hero h1{font-size:32px;font-weight:800;margin-bottom:6px}
.page-hero p{opacity:.85}
.crumb{font-size:13px;opacity:.8;margin-bottom:8px}

/* ---------- 联系/表单 ---------- */
.contact-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:40px;align-items:start}
.contact-item{display:flex;gap:16px;padding:20px;border:1px solid var(--line);border-radius:var(--radius);margin-bottom:16px;align-items:flex-start;background:#fff}
.contact-item .ci{width:46px;height:46px;border-radius:10px;background:var(--bg-soft);display:flex;align-items:center;justify-content:center;font-size:22px;color:var(--primary);flex-shrink:0}
.contact-item h4{font-size:16px;color:var(--primary);margin-bottom:2px}
.contact-item p{font-size:14px;color:var(--text-light)}
.contact-item a{color:var(--primary);font-weight:600}
.wa-btn{display:flex;align-items:center;gap:10px;background:#25D366;color:#fff;padding:14px 26px;border-radius:999px;font-weight:700;width:fit-content}
.wa-btn:hover{filter:brightness(1.05)}
.form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow)}
.form h3{font-size:20px;color:var(--primary);margin-bottom:20px}
.form label{font-size:14px;color:var(--text-light);display:block;margin:14px 0 6px}
.form input,.form textarea,.form select{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:8px;font-size:15px;font-family:inherit;background:#fff}
.form input:focus,.form textarea:focus,.form select:focus{outline:none;border-color:var(--primary)}
.form textarea{min-height:120px;resize:vertical}
.form .note{font-size:12px;color:#8fa5b8;margin-top:10px}

/* ---------- 聊天气泡 WhatsApp ---------- */
.wa-float{position:fixed;right:22px;bottom:22px;z-index:999;background:#25D366;width:58px;height:58px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 18px rgba(37,211,102,.4);transition:.25s}
.wa-float:hover{transform:scale(1.1)}

/* ============ 响应式 ============ */
@media(max-width:980px){
  .services-grid{grid-template-columns:repeat(2,1fr)}
  .gallery{grid-template-columns:repeat(2,1fr)}
  .features{grid-template-columns:repeat(2,1fr)}
  .footer .cols{grid-template-columns:1fr 1fr}
  .contact-grid{grid-template-columns:1fr}
  .hero h1{font-size:36px}
}
@media(max-width:640px){
  .nav-links{display:none;flex-direction:column;position:absolute;top:72px;left:0;right:0;background:#fff;padding:20px;gap:18px;box-shadow:0 10px 20px rgba(0,0,0,.08)}
  .nav-links.open{display:flex}
  .nav-toggle{display:block;background:none;border:none;font-size:26px;color:var(--primary);cursor:pointer}
  .services-grid,.gallery,.features{grid-template-columns:1fr}
  .hero h1{font-size:28px}
  .hero .container{padding:70px 20px 80px}
  .section{padding:56px 0}
  .footer .cols{grid-template-columns:1fr}
  .topbar .lang a{margin-left:4px}
}

/* ---------- 服务领域 Tab 组件 ---------- */
.svc-tabs{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.svc-tab{flex:1 1 auto;min-width:130px;padding:14px 20px;background:var(--soft);border:1px solid var(--line);border-radius:10px;font-size:16px;font-weight:600;color:var(--primary);cursor:pointer;transition:.2s}
.svc-tab:hover{border-color:var(--primary)}
.svc-tab.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.svc-panel{display:none}
.svc-panel.active{display:grid;grid-template-columns:1.1fr 1fr;gap:36px;align-items:start;animation:fadein .35s}
@keyframes fadein{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.svc-intro{font-size:15px;line-height:2;color:var(--text);padding:6px 0}
.svc-intro strong{color:var(--primary)}
.svc-imgs{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.svc-imgs .itab-img{border-radius:12px;overflow:hidden;aspect-ratio:4/3;box-shadow:0 2px 12px rgba(0,74,173,.08)}
.svc-imgs img{width:100%;height:100%;object-fit:cover;transition:.4s}
.svc-imgs .itab-img:hover img{transform:scale(1.05)}
@media(max-width:768px){.svc-panel.active{grid-template-columns:1fr}.svc-tab{min-width:calc(50% - 8px)}}