/* ===== 基础与变量 ===== */
:root{
  --navy-900:#0B2A4A;
  --navy-800:#123A63;
  --navy-700:#1B4E80;
  --navy-600:#2A629B;
  --gold:#C9A24B;
  --gold-soft:#E0B252;
  --gold-bg:#F7F1E3;
  --ink:#1A2233;
  --ink-2:#5A6473;
  --line:#E4E9F0;
  --bg:#FFFFFF;
  --bg-alt:#F5F7FA;
  --ok:#1E8E5A;
  --warn:#D98A1F;
  --radius:16px;
  --shadow:0 14px 40px rgba(11,42,74,.10);
  --shadow-sm:0 6px 18px rgba(11,42,74,.08);
  --maxw:1160px;
  --font: -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.gold{color:var(--gold)}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:999px;font-weight:600;font-size:15px;
  cursor:pointer;border:1.5px solid transparent;transition:.25s;white-space:nowrap;
}
.btn-lg{padding:14px 28px;font-size:16px}
.btn-block{width:100%}
.btn-gold{background:linear-gradient(135deg,var(--gold),var(--gold-soft));color:#3a2c08;box-shadow:0 8px 20px rgba(201,162,75,.35)}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(201,162,75,.45)}
.btn-outline{border-color:var(--navy-700);color:var(--navy-700);background:transparent}
.btn-outline:hover{background:var(--navy-700);color:#fff}
.btn-ghost{color:var(--navy-700);border-color:var(--line);background:#fff}
.btn-ghost:hover{border-color:var(--navy-700)}
.btn:hover{text-decoration:none}

/* ===== 导航 ===== */
.nav{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line);transition:.3s;
}
.nav.scrolled{box-shadow:var(--shadow-sm)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-logo{flex-shrink:0}
.brand-logo img{display:block}
.brand-mark{display:flex}
.brand-text strong{display:block;font-size:18px;color:var(--navy-900);letter-spacing:.5px;white-space:nowrap}
.brand-text small{font-size:11px;color:var(--gold);letter-spacing:2px;white-space:nowrap}
.nav-links{display:flex;gap:26px}
.nav-links a{font-size:15px;color:var(--ink-2);font-weight:500;position:relative;padding:4px 0}
.nav-links a:hover{color:var(--navy-700)}
.nav-links a::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--gold);transition:.25s}
.nav-links a:hover::after{width:100%}
.nav-cta{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:2.5px;background:var(--navy-900);border-radius:2px;transition:.3s}

/* ===== Hero ===== */
.hero{position:relative;background:radial-gradient(1200px 600px at 80% -10%,rgba(201,162,75,.18),transparent 60%),linear-gradient(160deg,var(--navy-900),var(--navy-800) 60%,var(--navy-700));color:#fff;overflow:hidden;padding:72px 0 110px}
.hero-inner{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.eyebrow{display:inline-block;background:rgba(201,162,75,.18);color:var(--gold-soft);border:1px solid rgba(201,162,75,.4);padding:6px 14px;border-radius:999px;font-size:13px;letter-spacing:1px;margin-bottom:18px}
.hero h1{font-size:42px;line-height:1.3;font-weight:800;margin-bottom:18px;letter-spacing:.3px}
.lead{font-size:18px;line-height:1.75;color:#e6ecf5;max-width:580px;margin-bottom:30px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:30px}
/* hero 深色底上的次级按钮：白描边+半透明白底，确保清晰可见 */
.hero-actions .btn-outline{
  border-color:rgba(255,255,255,.9);
  color:#fff;
  font-weight:700;
  background:rgba(11,42,74,.55);
  box-shadow:0 6px 18px rgba(0,0,0,.28);
  text-shadow:0 1px 3px rgba(0,0,0,.45);
}
.hero-actions .btn-outline:hover{
  background:#fff;
  color:var(--navy-900);
  border-color:#fff;
  text-shadow:none;
  transform:translateY(-2px);
  box-shadow:0 10px 24px rgba(255,255,255,.25);
}
.hero-trust{display:flex;gap:36px;list-style:none;flex-wrap:wrap;margin-top:2px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12)}
.hero-trust li{display:flex;flex-direction:column}
.hero-trust strong{font-size:28px;color:#fff;font-weight:800;line-height:1}
.hero-trust strong span{font-size:14px;color:#cdd8e6;margin-left:2px;font-weight:600}
.hero-trust em{font-style:normal;font-size:13px;color:#b9c6d6;margin-top:4px}

.hero-card{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);border-radius:18px;padding:24px;backdrop-filter:blur(6px);box-shadow:var(--shadow);display:flex;flex-direction:column}
.hero-card-top{display:flex;align-items:center;gap:8px;font-weight:600;color:#fff;margin-bottom:16px}
.dot{width:9px;height:9px;border-radius:50%;background:var(--gold-soft);box-shadow:0 0 0 4px rgba(224,178,82,.25)}
.hero-card-row{display:flex;justify-content:space-between;align-items:center;padding:11px 0;border-bottom:1px dashed rgba(255,255,255,.14);font-size:14px;color:#d6e0ee}
.hero-card-row b{font-size:13px;padding:3px 10px;border-radius:999px}
.hero-card-row .ok{background:rgba(30,142,90,.2);color:#8fe3b4}
.hero-card-row .warn{background:rgba(217,138,31,.22);color:#f2c277}
.hero-card-cta{margin-top:auto;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);text-align:center;color:#e2e9f3;font-weight:600;font-size:14px;letter-spacing:.3px}
.hero-wave{position:absolute;left:0;right:0;bottom:-1px;height:60px;background:var(--bg);clip-path:polygon(0 100%,100% 100%,100% 0,0 60%)}

/* ===== 通用 section ===== */
.section{padding:84px 0}
.section-alt{background:var(--bg-alt)}
.section-head{text-align:center;max-width:720px;margin:0 auto 48px}
.kicker{display:inline-block;color:var(--gold);font-weight:700;letter-spacing:2px;font-size:13px;margin-bottom:12px}
.kicker.light{color:var(--gold-soft)}
.section-head h2{font-size:32px;font-weight:800;color:var(--navy-900);line-height:1.3}
.section-head p{margin-top:14px;color:var(--ink-2);font-size:16px}

/* ===== 卡片网格 ===== */
.grid{display:grid;gap:24px}
.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:26px;box-shadow:var(--shadow-sm);transition:.28s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:rgba(201,162,75,.4)}

.pain-card .pain-ico,.svc-card .pain-ico{font-size:30px;margin-bottom:12px}
.pain-card h3,.svc-card h3{font-size:19px;color:var(--navy-900);margin-bottom:8px}
.pain-card p,.svc-card p{color:var(--ink-2);font-size:14.5px}
.svc-list{list-style:none;margin-top:14px;display:flex;flex-wrap:wrap;gap:8px}
.svc-list li{background:var(--gold-bg);color:#8a6d1f;font-size:12.5px;padding:5px 11px;border-radius:8px;font-weight:500}

.why-card .why-num{font-size:26px;font-weight:800;color:var(--gold);opacity:.85;margin-bottom:8px}
.why-card h3{font-size:18px;color:var(--navy-900);margin-bottom:8px}
.why-card p{color:var(--ink-2);font-size:14.5px}

/* ===== 关于 ===== */
.about-inner{display:grid;grid-template-columns:1.2fr .8fr;gap:48px;align-items:center}
.about-text h2{font-size:30px;color:var(--navy-900);margin:10px 0 18px;line-height:1.35}
.about-text p{color:var(--ink-2);margin-bottom:14px;font-size:15.5px}
.about-facts{display:flex;gap:18px;flex-wrap:wrap;margin-top:22px}
.about-facts div{background:var(--bg-alt);border:1px solid var(--line);border-radius:12px;padding:14px 18px}
.about-facts strong{display:block;color:var(--navy-800);font-size:14px;word-break:break-all}
.about-facts span{font-size:12px;color:var(--ink-2)}
.about-card{background:linear-gradient(160deg,var(--navy-800),var(--navy-700));color:#fff;border-radius:20px;padding:30px;text-align:center;box-shadow:var(--shadow)}
.avatar{width:74px;height:74px;border-radius:50%;background:linear-gradient(135deg,var(--gold),var(--gold-soft));color:var(--navy-900);font-size:34px;font-weight:800;display:flex;align-items:center;justify-content:center;margin:0 auto 14px}
.about-card h3{font-size:20px;margin-bottom:12px}
.about-card p{color:#d6e0ee;font-size:14.5px;font-style:italic}
.about-card-tags{display:flex;gap:8px;justify-content:center;margin-top:16px;flex-wrap:wrap}
.about-card-tags span{background:rgba(201,162,75,.2);color:var(--gold-soft);font-size:12px;padding:4px 12px;border-radius:999px}

/* ===== 案例 ===== */
.case-card{position:relative;overflow:hidden}
.case-tag{position:absolute;top:0;right:0;background:var(--navy-800);color:#fff;font-size:12px;padding:6px 14px;border-bottom-left-radius:14px}
.case-card h3{font-size:18px;color:var(--navy-900);margin:6px 0 10px}
.case-card p{color:var(--ink-2);font-size:14px;margin-bottom:16px}
.case-metric{background:var(--gold-bg);border-radius:12px;padding:12px 16px;text-align:center}
.case-metric strong{display:block;color:#8a6d1f;font-size:18px}
.case-metric span{font-size:12.5px;color:var(--ink-2)}

/* ===== 联系 ===== */
.contact{background:radial-gradient(900px 500px at 10% 0%,rgba(201,162,75,.12),transparent 60%),linear-gradient(160deg,var(--navy-900),var(--navy-800))}
.contact-inner{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.contact-info h2{font-size:30px;color:#fff;margin:10px 0 14px;line-height:1.35}
.contact-info p{color:#cdd8e6;margin-bottom:22px}
.contact-list{list-style:none;display:flex;flex-direction:column;gap:14px}
.contact-list li{display:flex;align-items:center;gap:12px;color:#e6edf6;font-size:15px}
.contact-list li span{color:var(--gold-soft);min-width:64px;font-weight:600}
.contact-list a{color:#fff;border-bottom:1px solid rgba(255,255,255,.3)}
.copy-btn{background:none;border:0;color:#fff;cursor:pointer;font-size:15px;border-bottom:1px dashed rgba(255,255,255,.5);padding:0}
.copy-btn:hover{color:var(--gold-soft)}

.contact-form{background:#fff;border-radius:20px;padding:30px;box-shadow:var(--shadow)}
.contact-form h3{font-size:21px;color:var(--navy-900);margin-bottom:6px}
.form-sub{color:var(--ink-2);font-size:14px;margin-bottom:18px}
.contact-form label{display:block;font-size:13.5px;color:var(--ink-2);font-weight:600;margin-bottom:14px}
.contact-form input,.contact-form select,.contact-form textarea{
  width:100%;margin-top:6px;padding:11px 14px;border:1.5px solid var(--line);border-radius:10px;
  font-size:15px;font-family:inherit;color:var(--ink);background:#fbfcfe;transition:.2s;
}
.contact-form input:focus,.contact-form select:focus,.contact-form textarea:focus{outline:none;border-color:var(--navy-600);background:#fff;box-shadow:0 0 0 3px rgba(42,98,155,.12)}
.contact-form textarea{resize:vertical}
.form-note{margin-top:12px;font-size:14px;font-weight:600;color:var(--ok)}
.form-note.err{color:#c0392b}

/* ===== 页脚 ===== */
.footer{background:var(--navy-900);color:#cdd8e6;padding:54px 0 0}
.footer-inner{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:32px;padding-bottom:34px}
.footer-brand strong{font-size:20px;color:#fff}
.footer-brand p{font-size:14px;margin-top:8px}
.footer-brand .muted{color:#8fa0b5;font-size:12.5px}
.footer-col h4{color:var(--gold-soft);font-size:15px;margin-bottom:14px}
.footer-col a,.footer-col span{display:block;color:#cdd8e6;font-size:14px;margin-bottom:9px}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:18px 0;font-size:12.5px}
.footer-bottom .container{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.footer-bottom .muted{color:#8fa0b5}

/* ===== 回到顶部 ===== */
.to-top{position:fixed;right:22px;bottom:22px;width:46px;height:46px;border-radius:50%;background:var(--navy-800);color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:.3s;z-index:40}
.to-top.show{opacity:1;pointer-events:auto}
.to-top:hover{background:var(--gold);color:var(--navy-900)}

/* ===== 滚动渐入 ===== */
.reveal{opacity:0;transform:translateY(24px);transition:.7s ease}
.reveal.in{opacity:1;transform:none}

/* ===== 加微信二维码浮层 ===== */
.wechat-modal{position:fixed;inset:0;z-index:80;display:none;align-items:center;justify-content:center;padding:20px}
.wechat-modal.open{display:flex;animation:wmFade .2s ease}
@keyframes wmFade{from{opacity:0}to{opacity:1}}
.wechat-modal__mask{position:absolute;inset:0;background:rgba(7,24,42,.6);backdrop-filter:blur(2px)}
.wechat-modal__dialog{position:relative;z-index:1;width:min(340px,92vw);background:#fff;border-radius:20px;padding:30px 26px 26px;text-align:center;box-shadow:0 24px 60px rgba(0,0,0,.35);animation:wmPop .25s ease}
@keyframes wmPop{from{transform:translateY(14px) scale(.96);opacity:0}to{transform:none;opacity:1}}
.wechat-modal__close{position:absolute;top:10px;right:14px;width:34px;height:34px;border:none;background:transparent;font-size:26px;line-height:1;color:#94a3b8;cursor:pointer;border-radius:50%;transition:.2s}
.wechat-modal__close:hover{background:#f1f5f9;color:#0B2A4A}
.wechat-modal__qr{width:200px;height:200px;margin:4px auto 18px;padding:12px;background:#fff;border:2px solid var(--gold);border-radius:16px;box-shadow:0 6px 18px rgba(11,42,74,.12)}
.wechat-modal__qr img{width:100%;height:100%;display:block;object-fit:contain}
.wechat-modal__title{font-size:20px;color:var(--navy-900);margin-bottom:6px}
.wechat-modal__sub{font-size:14px;color:var(--navy-700);margin-bottom:14px;font-weight:600}
.wechat-modal__id{display:inline-block;font-size:14px;color:#fff;background:var(--navy-800);padding:7px 14px;border-radius:999px;letter-spacing:.5px;margin-bottom:12px}
.wechat-modal__tip{font-size:12.5px;color:#8a97a8;margin:0}
@media (max-width:480px){
  .wechat-modal__qr{width:170px;height:170px}
  .wechat-modal__dialog{padding:26px 18px 22px}
}

/* ===== 品牌 logo 承载 ===== */
.brand-logo{display:flex;align-items:center}
.brand-logo img{display:block;height:40px;width:auto;background:#fff;border-radius:10px;padding:4px 8px;box-shadow:0 2px 8px rgba(11,42,74,.12)}
.brand-text{margin-left:2px}

/* ===== 实体信息卡（GEO 可被直接引用的权威事实） ===== */
.entity-card{margin-top:26px;background:linear-gradient(160deg,var(--navy-800),var(--navy-700));border-radius:18px;padding:22px 24px;box-shadow:var(--shadow)}
.entity-title{color:var(--gold-soft);font-size:15px;letter-spacing:1px;margin-bottom:14px;font-weight:700}
.entity-list{display:grid;grid-template-columns:1fr 1fr;gap:12px 22px;margin:0}
.entity-list>div{display:flex;flex-direction:column;gap:3px;padding-bottom:10px;border-bottom:1px dashed rgba(255,255,255,.16)}
.entity-list dt{font-size:12px;color:#9fb1c6;order:1}
.entity-list dd{font-size:14px;color:#fff;font-weight:600;order:2;word-break:break-all}
.entity-list dd a{color:#fff;border-bottom:1px solid rgba(255,255,255,.4)}

/* ===== FAQ 折叠问答 ===== */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:860px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;padding:0;box-shadow:var(--shadow-sm);overflow:hidden;transition:.25s}
.faq-item[open]{border-color:rgba(201,162,75,.5);box-shadow:var(--shadow)}
.faq-item summary{list-style:none;cursor:pointer;padding:18px 22px;font-size:16px;font-weight:600;color:var(--navy-900);display:flex;align-items:center;justify-content:space-between;gap:14px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:22px;color:var(--gold);font-weight:700;flex-shrink:0;transition:.25s}
.faq-item[open] summary::after{content:"\2212";transform:rotate(180deg)}
.faq-item>div{padding:0 22px 18px}
.faq-item>div p{color:var(--ink-2);font-size:15px;line-height:1.8;margin:0}

/* ===== 响应式 ===== */
@media (max-width:980px){
  .hero-inner,.about-inner,.contact-inner{grid-template-columns:1fr}
  .hero-card{max-width:420px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr 1fr}
}
/* 平板宽度提前收起导航，避免品牌名被右侧按钮挤压遮挡 */
@media (max-width:900px){
  .nav-links{position:fixed;top:68px;left:0;right:0;background:#fff;flex-direction:column;gap:0;padding:8px 24px 18px;box-shadow:var(--shadow);transform:translateY(-120%);transition:.3s;z-index:49}
  .nav-links.open{transform:none}
  .nav-links a{padding:13px 0;border-bottom:1px solid var(--line);width:100%}
  .nav-cta .btn-ghost{display:none}
  .nav-toggle{display:flex}
  .brand-logo img{height:34px}
}
@media (max-width:720px){
  .hero{padding:54px 0 90px}
  .hero h1{font-size:30px}
  .section{padding:60px 0}
  .section-head h2{font-size:25px}
  .grid-3,.grid-4{grid-template-columns:1fr}
  .hero-trust{gap:22px}
  .footer-inner{grid-template-columns:1fr}
  .footer-bottom .container{flex-direction:column}
  .entity-list{grid-template-columns:1fr}
}