/* =====================================================================
   企业官网 前端样式（苹果风 · 响应式双端）
   无 CDN 依赖，字体走系统字体栈（国内加载快）
   ===================================================================== */

:root{
  /* 文字 */
  --text-primary:#1d1d1f;
  --text-secondary:#86868b;
  --text-tertiary:#6e6e73;
  --text-on-dark:#f5f5f7;
  /* 表面 */
  --surface:#ffffff;
  --surface-alt:#f5f5f7;
  --surface-dark:#161617;
  --hairline:rgba(0,0,0,.10);
  /* 强调 */
  --accent:#0071e3;
  --accent-hover:#0077ed;
  --gradient:linear-gradient(90deg,#0071e3 0%,#5e5ce6 50%,#bf5af2 100%);
  /* 语义 */
  --success:#34c759; --warning:#ff9f0a; --danger:#ff3b30;
  /* 形状 */
  --radius-pill:980px; --radius-lg:18px; --radius-md:12px;
  /* 阴影 */
  --shadow-1:0 1px 3px rgba(0,0,0,.06);
  --shadow-2:0 8px 24px rgba(0,0,0,.08);
  --shadow-3:0 24px 64px rgba(0,0,0,.14);
  /* 动效 */
  --ease:cubic-bezier(.16,1,.3,1);
  /* 字体 */
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  /* 布局 */
  --container:1200px; --nav-h:52px;
  --fs-hero:72px; --fs-h1:44px; --fs-h2:32px; --fs-h3:17px; --fs-body:14px; --fs-caption:12px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font);color:var(--text-primary);font-size:var(--fs-body);line-height:1.6;background:var(--surface);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}

.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section.alt{background:var(--surface-alt)}

/* 区块标题 */
.sec-head{text-align:center;max-width:680px;margin:0 auto 56px}
.sec-label{font-size:12px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin-bottom:12px}
.sec-title{font-size:var(--fs-h2);font-weight:700;letter-spacing:-.02em;line-height:1.2}
.sec-sub{font-size:var(--fs-body);color:var(--text-secondary);margin-top:12px}

/* ============ 导航 ============ */
.nav{position:fixed;top:0;left:0;right:0;height:var(--nav-h);z-index:100;
  background:rgba(255,255,255,.8);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);
  border-bottom:1px solid var(--hairline)}
@supports not (backdrop-filter:blur(1px)){.nav{background:rgba(251,251,253,.98)}}
.nav-inner{max-width:var(--container);margin:0 auto;height:100%;display:flex;align-items:center;justify-content:space-between;padding:0 24px}
.logo{font-size:17px;font-weight:700;letter-spacing:-.01em}
.logo span{color:var(--accent)}
.nav-links{display:flex;gap:32px}
.nav-links a{font-size:14px;color:var(--text-primary);opacity:.8;transition:opacity .3s var(--ease)}
.nav-links a:hover,.nav-links a.active{opacity:1;color:var(--accent)}
.nav-cta{padding:8px 20px;border-radius:var(--radius-pill);background:var(--accent);color:#fff;font-size:14px;font-weight:500;transition:background .3s var(--ease)}
.nav-cta:hover{background:var(--accent-hover)}
.nav-burger{display:none;width:40px;height:40px;flex-direction:column;justify-content:center;gap:5px;align-items:center}
.nav-burger span{display:block;width:20px;height:2px;background:var(--text-primary);transition:.3s var(--ease)}
.nav-burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-burger.open span:nth-child(2){opacity:0}
.nav-burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ============ Hero ============ */
.hero{position:relative;padding:160px 0 96px;text-align:center;overflow:hidden;background:var(--surface)}
.hero-glow{position:absolute;top:-20%;left:50%;transform:translateX(-50%);width:800px;height:600px;
  background:radial-gradient(circle,rgba(0,113,227,.12),rgba(94,92,230,.06) 40%,transparent 70%);pointer-events:none}
.hero h1{font-size:var(--fs-hero);font-weight:700;letter-spacing:-.03em;line-height:1.05;max-width:880px;margin:0 auto}
.hero h1 .grad{background:var(--gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero p{font-size:20px;color:var(--text-secondary);max-width:600px;margin:24px auto 0}
.hero-actions{display:flex;gap:16px;justify-content:center;margin-top:40px}
.btn{display:inline-flex;align-items:center;justify-content:center;height:44px;padding:0 28px;border-radius:var(--radius-pill);font-size:15px;font-weight:500;transition:.3s var(--ease)}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-hover);transform:translateY(-1px)}
.btn-ghost{background:var(--surface-alt);color:var(--text-primary)}
.btn-ghost:hover{background:#e8e8ed}

/* ============ 产品卡 ============ */
.grid{display:grid;gap:24px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--surface);border-radius:var(--radius-lg);border:1px solid #e5e5e7;overflow:hidden;transition:transform .4s var(--ease),box-shadow .4s var(--ease)}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-3)}
.card-media{aspect-ratio:1/1;background:var(--surface-alt);overflow:hidden}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:20px}
.card-title{font-size:17px;font-weight:600;letter-spacing:-.01em;margin-bottom:6px}
.card-sub{font-size:13px;color:var(--text-secondary);line-height:1.5}

/* ============ 新闻行 ============ */
.news-row{display:flex;align-items:flex-start;gap:24px;padding:24px 0;border-bottom:1px solid var(--hairline);transition:transform .3s var(--ease)}
.news-row:hover{transform:translateX(6px)}
.news-date{font-size:22px;font-weight:700;color:var(--text-primary);line-height:1;min-width:80px;text-align:center}
.news-date small{display:block;font-size:12px;color:var(--text-secondary);font-weight:400;margin-top:4px}
.news-title{font-size:15px;font-weight:600}
.news-summary{font-size:13px;color:var(--text-secondary);margin-top:6px}

/* ============ Logo 墙 ============ */
.logo-wall{display:flex;flex-wrap:wrap;gap:24px;justify-content:center;align-items:center}
.logo-wall img{height:48px;filter:grayscale(1);opacity:.6;transition:.3s var(--ease)}
.logo-wall img:hover{filter:grayscale(0);opacity:1}

/* ============ 表单 ============ */
.form-card{max-width:440px;margin:0 auto;background:var(--surface);border-radius:var(--radius-lg);padding:40px;box-shadow:var(--shadow-2)}
.form-item{margin-bottom:20px}
.form-item label{display:block;font-size:13px;font-weight:500;margin-bottom:8px}
.form-item input,.form-item textarea,.form-item select{width:100%;height:44px;padding:0 16px;border:1px solid var(--hairline);border-radius:var(--radius-md);font-size:14px;font-family:inherit;background:var(--surface);transition:.2s var(--ease)}
.form-item textarea{height:120px;padding:12px 16px;resize:vertical}
.form-item input:focus,.form-item textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px rgba(0,113,227,.15)}
.form-item .error{color:var(--danger);font-size:12px;margin-top:6px}
.form-submit{width:100%;height:44px;border-radius:var(--radius-pill);background:var(--accent);color:#fff;font-size:15px;font-weight:500;transition:background .3s var(--ease)}
.form-submit:hover{background:var(--accent-hover)}

/* ============ 页脚 ============ */
.footer{background:var(--surface-dark);color:var(--text-on-dark);padding:64px 0 32px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:48px}
.footer h4{font-size:14px;font-weight:600;margin-bottom:16px;color:#fff}
.footer a,.footer p{font-size:13px;color:#a1a1a6;line-height:2;transition:color .3s}
.footer a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:24px;font-size:12px;color:#6e6e73;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

/* ============ 通用页头 / 面包屑 ============ */
.page-head{background:var(--surface-alt);padding:64px 0 40px;text-align:center}
.page-head h1{font-size:var(--fs-h1);font-weight:700;letter-spacing:-.02em}
.breadcrumb{font-size:12px;color:var(--text-secondary);margin-top:12px}
.breadcrumb a:hover{color:var(--accent)}

/* 富文本正文 */
.article{max-width:780px;margin:0 auto;font-size:15px;line-height:1.8;color:#3a3a3c}
.article h2{font-size:24px;font-weight:700;margin:32px 0 16px;letter-spacing:-.01em}
.article h3{font-size:19px;font-weight:600;margin:24px 0 12px}
.article p{margin:14px 0}
.article img{border-radius:var(--radius-lg);margin:20px 0}
.article ul,.article ol{padding-left:24px;margin:14px 0}
.article li{margin:6px 0}

/* 分页 */
.pagination{display:flex;gap:8px;justify-content:center;margin-top:48px}
.pagination a,.pagination span{width:36px;height:36px;display:flex;align-items:center;justify-content:center;border-radius:50%;font-size:14px;background:var(--surface);border:1px solid var(--hairline);transition:.2s var(--ease)}
.pagination .cur{background:var(--text-primary);color:#fff;border-color:var(--text-primary)}
.pagination a:hover{border-color:var(--accent);color:var(--accent)}

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

/* 懒加载 */
img.lazy{opacity:0;transition:opacity .4s}
img.lazy.loaded{opacity:1}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .grid-4{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:767px){
  :root{--fs-hero:40px;--fs-h1:32px;--fs-h2:24px}
  .section{padding:64px 0}
  .hero{padding:120px 0 64px}
  .hero p{font-size:16px}
  .hero-actions{flex-direction:column;padding:0 16px}
  .btn{width:100%}
  .grid-4,.grid-3{grid-template-columns:repeat(2,1fr);gap:12px}
  .grid-2{grid-template-columns:1fr}
  /* 移动端导航 → 抽屉 */
  .nav-burger{display:flex}
  .nav-links{position:fixed;top:var(--nav-h);right:0;bottom:0;width:280px;background:var(--surface);
    flex-direction:column;gap:0;padding:20px;transform:translateX(100%);transition:transform .3s var(--ease);
    box-shadow:var(--shadow-3)}
  .nav-links.open{transform:translateX(0)}
  .nav-links a{display:block;padding:14px 0;font-size:16px;border-bottom:1px solid var(--hairline)}
  .nav-cta{display:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:24px}
  .news-date{min-width:60px;font-size:18px}
  .form-card{padding:28px 20px;box-shadow:none}
  .breadcrumb{display:none}
}

/* 动效降级 */
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}