/* ===================================================
   星达膜结构 - 省级分站共享样式
   各省份通过 :root 中的 CSS 变量覆盖配色实现差异化
   字体仅使用系统字体（PingFang SC / Microsoft YaHei 等）规避字体侵权
   =================================================== */

/* ============ 默认配色（可被各省份 index.html 覆盖） ============ */
:root{
  --c-primary:#0a4d8c;
  --c-primary-2:#1066b8;
  --c-primary-3:#1a86dc;
  --c-accent:#ff8a00;
  --c-accent-2:#ffd23f;
  --c-text:#2b3245;
  --c-text-2:#5b6577;
  --c-line:#e6ebf2;
  --c-bg:#f6f8fb;
  --c-bg-2:#ffffff;
  --c-hero-overlay:rgba(8,28,52,.55);
  --radius:14px;
  --shadow-sm:0 2px 8px rgba(10,77,140,.06);
  --shadow-md:0 8px 28px rgba(10,77,140,.10);
  --shadow-lg:0 18px 50px rgba(10,77,140,.18);
  --hero-bg:linear-gradient(135deg,var(--c-primary) 0%,var(--c-primary-2) 50%,var(--c-primary-3) 100%);
}

/* ============ 全局重置 ============ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color:var(--c-text);background:var(--c-bg);line-height:1.7;font-size:15px;overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;border:0}
a{color:inherit;text-decoration:none;transition:color .25s ease}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer;border:0;background:transparent}

/* ============ 容器 ============ */
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px;position:relative}
.container-narrow{max-width:880px}

/* ============ 顶部联系条 ============ */
.top-bar{background:var(--hero-bg);color:#e9f3ff;font-size:13px;padding:7px 0}
.top-bar-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:6px}
.top-bar-right{display:flex;align-items:center;gap:8px}
.top-link{color:#fff;font-weight:500}
.top-bar .sep{opacity:.5}

/* ============ Hero Banner ============ */
.hero{
  position:relative;
  background:var(--hero-bg);
  color:#fff;overflow:hidden;
  isolation:isolate;
}
.hero-photo{
  position:absolute;inset:0;width:100%;height:100%;
  object-fit:cover;object-position:center 35%;z-index:0;
  animation:heroZoom 24s ease-in-out infinite alternate;
  transform-origin:center center;
}
@keyframes heroZoom{
  0%{transform:scale(1) translate(0,0)}
  100%{transform:scale(1.08) translate(-1.5%,-1%)}
}
.hero-bg{position:absolute;inset:0;z-index:1;pointer-events:none}
.hero-bg::before{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(180deg,var(--c-hero-overlay) 0%,rgba(8,28,52,.10) 30%,rgba(8,28,52,.15) 60%,var(--c-hero-overlay) 100%),
    linear-gradient(90deg,var(--c-hero-overlay) 0%,transparent 45%);
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(ellipse at 75% 20%,rgba(255,210,63,.18),transparent 55%);
  animation:heroGlow 8s ease-in-out infinite;z-index:1;
}
@keyframes heroGlow{0%,100%{opacity:.6}50%{opacity:1}}
.hero-grid{
  position:absolute;inset:0;z-index:2;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:60px 60px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.5),transparent 80%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.5),transparent 80%);
  opacity:.6;
}

/* 导航 */
.nav{position:relative;z-index:10;transition:all .3s ease;padding:8px 0}
.nav.scrolled{
  position:fixed;top:0;left:0;right:0;
  background:rgba(10,77,140,.92);backdrop-filter:saturate(180%) blur(12px);
  box-shadow:0 6px 22px rgba(0,0,0,.18);padding:4px 0;animation:navIn .35s ease;
}
@keyframes navIn{from{transform:translateY(-100%)}to{transform:translateY(0)}}
.nav-inner{display:flex;justify-content:space-between;align-items:center;gap:20px}

/* LOGO */
.logo{display:flex;align-items:center;gap:8px;font-weight:700}
.logo-brand{
  font-size:24px;color:#fff;letter-spacing:1px;
  text-shadow:0 2px 8px rgba(0,0,0,.25),0 0 18px rgba(255,210,63,.4);
  background:linear-gradient(180deg,#fff,#cfe6ff 70%,#9cc7ff);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  white-space:nowrap;
}
.logo-reg{font-size:9px;vertical-align:super;color:var(--c-accent-2);-webkit-text-fill-color:var(--c-accent-2);margin-left:1px;font-weight:700}
.logo-sep{color:rgba(255,255,255,.45);font-weight:300;font-size:18px}
.logo-tag{font-size:13px;color:var(--c-accent-2);letter-spacing:.5px;font-weight:600;white-space:nowrap}

/* 菜单 */
.nav-menu{display:flex;align-items:center;gap:6px}
.nav-menu a{
  color:#e9f3ff;padding:8px 14px;border-radius:8px;font-size:15px;font-weight:500;position:relative;
}
.nav-menu a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--c-accent-2);transform:scaleX(0);transform-origin:left;transition:transform .3s ease;
}
.nav-menu a:hover{background:rgba(255,255,255,.10)}
.nav-menu a:hover::after{transform:scaleX(1)}

.nav-toggle{display:none;width:42px;height:42px;flex-direction:column;justify-content:center;align-items:center;gap:5px;border-radius:8px}
.nav-toggle span{display:block;width:24px;height:2px;background:#fff;border-radius:2px;transition:.3s}
.nav-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* Hero 内容 */
.hero-content{position:relative;z-index:5;padding:60px 20px 90px;text-align:center;animation:heroIn .8s ease}
@keyframes heroIn{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
.hero-title{font-size:clamp(28px,5vw,52px);font-weight:800;line-height:1.2;margin-bottom:14px;display:flex;flex-direction:column;gap:6px;align-items:center}
.hero-brand{color:var(--c-accent-2);text-shadow:0 4px 18px rgba(0,0,0,.35)}
.hero-sub{font-size:clamp(14px,2.2vw,20px);color:#d8e8f8;font-weight:400;letter-spacing:1px}
.hero-desc{max-width:780px;margin:0 auto 22px;color:#e1edfb;font-size:clamp(14px,1.8vw,16px)}
.hero-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:26px}
.hero-tag{
  padding:6px 14px;border-radius:30px;
  background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.20);
  font-size:13px;color:#fff;backdrop-filter:blur(6px);
}
.hero-cta{display:flex;flex-wrap:wrap;justify-content:center;gap:14px}

/* 按钮 */
.btn{display:inline-block;padding:12px 26px;border-radius:30px;font-weight:600;font-size:15px;transition:all .25s ease;cursor:pointer;text-align:center}
.btn-primary{background:linear-gradient(135deg,var(--c-accent),#ffb733);color:#fff;box-shadow:0 8px 20px rgba(255,138,0,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(255,138,0,.45)}
.btn-ghost{background:rgba(255,255,255,.12);color:#fff;border:1.5px solid rgba(255,255,255,.45)}
.btn-ghost:hover{background:rgba(255,255,255,.22)}
.btn-lg{padding:16px 38px;font-size:17px}

/* ============ 通用区块 ============ */
.section{padding:64px 0}
.section-alt{background:#fff}
.section-head{text-align:center;margin-bottom:40px}
.section-en{display:inline-block;font-size:13px;letter-spacing:3px;color:var(--c-primary-2);font-weight:600;text-transform:uppercase;padding:4px 14px;background:rgba(16,102,184,.10);border-radius:20px;margin-bottom:14px}
.section-title{font-size:clamp(24px,3.5vw,34px);color:var(--c-text);font-weight:800;margin-bottom:8px}
.section-sub{color:var(--c-text-2);font-size:15px}

/* ============ 公司介绍 ============ */
.about-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:30px;align-items:start}
.about-text p{margin-bottom:14px;color:var(--c-text-2);line-height:1.9}
.about-text strong{color:var(--c-primary);font-weight:600}
.about-tags{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.about-tag-card{
  display:flex;align-items:center;gap:12px;padding:14px;
  background:#f4f8fd;border:1px solid var(--c-line);border-radius:12px;transition:all .25s ease;
}
.about-tag-card:hover{background:#fff;box-shadow:var(--shadow-md);transform:translateY(-2px);border-color:#cfe0f0}
.tag-icon{
  width:40px;height:40px;border-radius:10px;flex-shrink:0;
  background:var(--hero-bg);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;
}
.about-tag-card h3{font-size:15px;color:var(--c-text);margin-bottom:2px}
.about-tag-card p{font-size:12.5px;color:var(--c-text-2)}

/* ============ 产品展示 ============ */
.product-block{margin-bottom:48px}
.product-head{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px;margin-bottom:18px;padding-bottom:12px;border-bottom:2px solid var(--c-line)}
.product-title{font-size:22px;color:var(--c-text);font-weight:700;padding-left:14px;position:relative}
.product-title::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:5px;height:22px;border-radius:3px;background:var(--hero-bg);
}
.product-count{font-size:13px;color:var(--c-text-2);background:#eef3fa;padding:3px 12px;border-radius:20px}
.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.product-card{background:#fff;border-radius:12px;overflow:hidden;border:1px solid var(--c-line);transition:all .3s ease;cursor:pointer;display:flex;flex-direction:column}
.product-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#bcd5ee}
.product-card-img{aspect-ratio:4/3;background:#eef3fa;overflow:hidden}
.product-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.product-card:hover .product-card-img img{transform:scale(1.08)}
.product-card-info{padding:10px 12px 12px}
.product-card-name{font-size:14px;font-weight:600;color:var(--c-text);margin-bottom:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.product-card-desc{font-size:12.5px;color:var(--c-text-2);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* ============ 地方特色板块（差异化） ============ */
.local-section{background:var(--hero-bg);color:#fff;padding:64px 0;position:relative;overflow:hidden}
.local-section::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(circle at 20% 30%,rgba(255,210,63,.15),transparent 50%),
             radial-gradient(circle at 80% 70%,rgba(255,255,255,.08),transparent 50%);
}
.local-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;position:relative;z-index:1;max-width:960px;margin:0 auto}
.local-card{
  background:rgba(255,255,255,.10);backdrop-filter:blur(10px);
  border:1px solid rgba(255,255,255,.20);border-radius:14px;padding:24px;
  transition:all .3s ease;
}
.local-card:hover{background:rgba(255,255,255,.18);transform:translateY(-4px)}
.local-card-icon{font-size:32px;margin-bottom:12px}
.local-card h3{font-size:18px;color:var(--c-accent-2);margin-bottom:8px}
.local-card p{font-size:14px;color:#e1edfb;line-height:1.7}

/* ============ 应用领域 ============ */
.fields-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.field-card{padding:24px 18px;border-radius:14px;background:#fff;border:1px solid var(--c-line);text-align:center;transition:all .3s ease}
.field-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#cfe0f0}
.field-icon{
  width:56px;height:56px;border-radius:50%;margin:0 auto 14px;
  background:linear-gradient(135deg,rgba(10,77,140,.10),rgba(16,102,184,.18));
  color:var(--c-primary);display:flex;align-items:center;justify-content:center;font-size:24px;font-weight:700;
}
.field-card h3{font-size:17px;color:var(--c-text);margin-bottom:6px}
.field-card p{font-size:13px;color:var(--c-text-2)}

/* ============ 案例 ============ */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.case-card{background:#fff;border-radius:12px;overflow:hidden;border:1px solid var(--c-line);transition:all .3s ease;cursor:pointer}
.case-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#bcd5ee}
.case-card-img{aspect-ratio:4/3;background:#eef3fa;overflow:hidden;position:relative}
.case-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.case-card:hover .case-card-img img{transform:scale(1.06)}
.case-card-location{position:absolute;left:8px;bottom:8px;background:rgba(10,77,140,.85);color:#fff;font-size:12px;padding:3px 10px;border-radius:20px;backdrop-filter:blur(4px)}
.case-card-info{padding:10px 12px 12px}
.case-card-name{font-size:14px;font-weight:600;color:var(--c-text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:10px}
.faq-item{background:#fff;border:1px solid var(--c-line);border-radius:10px;overflow:hidden;transition:all .25s ease}
.faq-item[open]{border-color:#bcd5ee;box-shadow:var(--shadow-sm)}
.faq-item summary{padding:16px 50px 16px 18px;font-size:15.5px;font-weight:600;color:var(--c-text);cursor:pointer;position:relative;list-style:none;user-select:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);
  width:22px;height:22px;border-radius:50%;background:var(--c-primary);color:#fff;
  font-size:18px;line-height:1;text-align:center;transition:transform .25s ease;
}
.faq-item[open] summary::after{content:"–";transform:translateY(-50%) rotate(180deg);background:var(--c-accent)}
.faq-answer{padding:0 18px 16px;color:var(--c-text-2);font-size:14.5px;line-height:1.9}

/* ============ 联系方式 ============ */
.contact-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:30px;align-items:center}
.contact-info{background:#fff;border-radius:14px;padding:28px;border:1px solid var(--c-line);box-shadow:var(--shadow-sm)}
.contact-item{display:flex;align-items:baseline;gap:14px;padding:12px 0;border-bottom:1px dashed var(--c-line)}
.contact-item:last-of-type{border-bottom:0}
.contact-label{flex-shrink:0;width:90px;font-size:13px;color:var(--c-text-2);font-weight:500}
.contact-value{font-size:16px;color:var(--c-text);font-weight:600}
.contact-phone{color:var(--c-accent);font-size:22px;font-weight:800;letter-spacing:.5px}
.contact-cta{margin-top:18px;text-align:center}
.contact-qr{background:var(--hero-bg);border-radius:14px;padding:24px;text-align:center;color:#fff;box-shadow:var(--shadow-md)}
.contact-qr img{margin:0 auto;border-radius:10px;border:6px solid #fff;background:#fff;width:240px;height:240px}
.qr-tip{margin-top:14px;font-size:14px;line-height:1.7;color:#d8e8f8}

/* ============ 城市分站链接 ============ */
.city-links{background:#fff;padding:48px 0;border-top:1px solid var(--c-line)}
.city-links-head{text-align:center;margin-bottom:24px}
.city-links-head h3{font-size:22px;color:var(--c-text);font-weight:700;margin-bottom:6px}
.city-links-head p{font-size:14px;color:var(--c-text-2)}
.city-links-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px 12px}
.city-link{
  display:inline-flex;align-items:center;justify-content:space-between;
  padding:10px 14px;background:#f4f8fd;border:1px solid var(--c-line);
  border-radius:8px;font-size:14px;color:var(--c-text-2);transition:all .25s ease;
}
.city-link:hover{background:var(--hero-bg);color:#fff;border-color:transparent;transform:translateX(4px)}
.city-link .arrow{font-size:12px;opacity:.6}
.city-link:hover .arrow{opacity:1}

/* ============ 底部 ============ */
.footer{background:#0a2647;color:#a8bcd4;padding:36px 0 20px;background-image:linear-gradient(180deg,#0a3d70 0%,#0a2647 100%)}
.footer-inner{display:flex;flex-direction:column;align-items:center;text-align:center;gap:14px}
.footer-logo{display:inline-flex;align-items:center;gap:8px;font-size:22px;font-weight:700;color:#fff;text-shadow:0 2px 10px rgba(0,0,0,.35)}
.footer-logo sup{color:var(--c-accent-2);font-size:10px;font-weight:700}
.footer-sep{color:rgba(255,255,255,.4);font-weight:300}
.footer-slogan{color:#8aa6c4;font-size:13px;margin-top:4px}
.footer-nav{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 22px;border-top:1px solid rgba(255,255,255,.08);border-bottom:1px solid rgba(255,255,255,.08);padding:14px 0;margin:6px 0}
.footer-nav a{color:#cdd9ea;font-size:14px}
.footer-nav a:hover{color:var(--c-accent-2)}
.footer-meta{font-size:13px;color:#8aa6c4;line-height:1.9}
.footer-meta a{color:#cdd9ea;border-bottom:1px dotted rgba(255,255,255,.2)}
.footer-meta a:hover{color:var(--c-accent-2)}

/* ============ 悬浮按钮 ============ */
.float-contact{
  position:fixed;right:18px;bottom:18px;width:54px;height:54px;border-radius:50%;
  background:linear-gradient(135deg,var(--c-accent),#ffb733);color:#fff;font-size:24px;
  display:flex;align-items:center;justify-content:center;z-index:80;
  box-shadow:0 8px 22px rgba(255,138,0,.45);text-decoration:none;
  animation:floatPulse 2s ease-in-out infinite;
}
@keyframes floatPulse{0%,100%{box-shadow:0 8px 22px rgba(255,138,0,.45)}50%{box-shadow:0 8px 32px rgba(255,138,0,.65)}}
.float-contact:hover{transform:scale(1.08)}

/* ============ 灯箱 ============ */
.lightbox{position:fixed;inset:0;background:rgba(8,18,32,.92);z-index:200;display:none;align-items:center;justify-content:center;padding:30px;flex-direction:column;backdrop-filter:blur(4px)}
.lightbox.active{display:flex;animation:fadeIn .25s ease}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.lightbox-img{max-width:90%;max-height:80vh;border-radius:6px;box-shadow:0 20px 60px rgba(0,0,0,.5)}
.lightbox-caption{color:#d8e8f8;margin-top:14px;font-size:14px;text-align:center;max-width:80%}
.lightbox-close,.lightbox-prev,.lightbox-next{position:absolute;color:#fff;font-size:38px;width:48px;height:48px;border-radius:50%;background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.25);display:flex;align-items:center;justify-content:center;transition:background .2s}
.lightbox-close:hover,.lightbox-prev:hover,.lightbox-next:hover{background:rgba(255,255,255,.22)}
.lightbox-close{top:20px;right:20px;font-size:30px}
.lightbox-prev{left:20px;top:50%;transform:translateY(-50%)}
.lightbox-next{right:20px;top:50%;transform:translateY(-50%)}

/* ============ 响应式 ============ */
@media (max-width:1080px){
  .product-grid{grid-template-columns:repeat(3,1fr)}
  .local-grid{grid-template-columns:repeat(2,1fr)}
  .case-grid{grid-template-columns:repeat(3,1fr)}
  .city-links-grid{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:900px){
  .nav-toggle{display:flex}
  .nav-menu{
    position:fixed;top:0;right:-100%;bottom:0;width:280px;flex-direction:column;
    background:var(--hero-bg);padding:80px 16px 16px;align-items:stretch;gap:4px;transition:right .3s ease;z-index:50;
    box-shadow:-8px 0 30px rgba(0,0,0,.3);
  }
  .nav-menu.active{right:0}
  .nav-menu a{padding:12px 14px;border-radius:8px;font-size:16px}
  .about-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .local-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
  .section{padding:48px 0}
  .product-grid{grid-template-columns:repeat(2,1fr)}
  .fields-grid{grid-template-columns:repeat(2,1fr)}
  .case-grid{grid-template-columns:repeat(2,1fr)}
  .city-links-grid{grid-template-columns:repeat(2,1fr)}
  .hero-content{padding:48px 20px 70px}
  .logo-brand{font-size:20px}
  .logo-tag{font-size:11px}
  .top-bar{font-size:12px}
  .top-bar-inner{justify-content:center;text-align:center}
  .footer-nav{gap:6px 16px}
  .contact-phone{font-size:20px}
  .local-grid{grid-template-columns:1fr}
  .lightbox-prev,.lightbox-next{width:38px;height:38px;font-size:28px}
}
@media (max-width:480px){
  .product-grid,.fields-grid,.case-grid,.city-links-grid{grid-template-columns:1fr}
  .about-tags{grid-template-columns:1fr 1fr}
  .hero-cta{flex-direction:column}
  .hero-cta .btn{width:100%}
  .hero-tags{gap:6px}
  .hero-tag{font-size:12px;padding:5px 10px}
}

/* ============ 滚动淡入 ============ */
.fade-in{opacity:0;transform:translateY(20px);transition:opacity .6s ease,transform .6s ease}
.fade-in.visible{opacity:1;transform:translateY(0)}