/*
 Theme Name: 点胶中国
 Theme URI: https://点胶.中国
 Author: 深圳市亨润科技有限公司
 Author URI: https://点胶.中国
 Description: 压电阀销售与压电阀知识发布的官方 WordPress 主题。非接触式压电喷射技术，频率 1–645Hz 稳定输出，不刮伤工件表面。
 Version: 1.1.0
 Requires at least: 5.8
 Tested up to: 6.6
 Requires PHP: 7.4
 Text Domain: dianjiao-china
 Tags: industrial, manufacturing, product, blog, responsive, custom-colors
*/

/* ══════════════════════════════════════
   设计系统 — 带电科技风 v1.1
   核心视觉：深空蓝底 + 青色电光 + 网格纹理 + 发光层
   ══════════════════════════════════════ */
:root{
  --navy:#060D18;
  --navy-2:#0B1629;
  --navy-3:#111D33;
  --navy-4:#172642;
  --blue:#1E6FD9;
  --blue-glow:rgba(30,111,217,.35);
  --accent:#00D4FF;
  --accent-dim:#00A8CC;
  --accent-glow:rgba(0,212,255,.22);
  --accent-strong:rgba(0,212,255,.55);
  --electric:#00FFD4;
  --bg:#F0F4FA;
  --card:#FFFFFF;
  --ink:#0E1829;
  --muted:#5D708A;
  --line:#DFE6EE;
  --radius:16px;
  --maxw:1200px;
  --header-h:72px;
  --font:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --glow-sm:0 0 12px rgba(0,212,255,.18), 0 2px 8px rgba(0,0,0,.3);
  --glow-md:0 0 24px rgba(0,212,255,.25), 0 8px 32px rgba(0,0,0,.35);
  --glow-lg:0 0 40px rgba(0,212,255,.3), 0 16px 48px rgba(0,0,0,.4);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0; font-family:var(--font); color:var(--ink); background:var(--bg);
  line-height:1.7; -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--blue);text-decoration:none;transition:color .2s;}
a:hover{color:var(--accent);}
h1,h2,h3,h4{line-height:1.2;margin:0 0 .5em;font-weight:800;letter-spacing:-.02em;}
p{margin:0 0 1em;}

.container{max-width:var(--maxw);margin:0 auto;padding:0 28px;}

/* 无障碍跳转 */
.skip-link{
  position:absolute;left:-999px;top:0;background:var(--accent);color:var(--navy);
  padding:10px 16px;z-index:10000;border-radius:0 0 10px 0;font-weight:700;
}
.skip-link:focus{left:0;}

/* ══════════════════════════════════════
   按钮 — 渐变 + 电光 hover
   ══════════════════════════════════════ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:15px 30px;border-radius:10px;font-weight:800;font-size:15px;
  border:none;cursor:pointer;position:relative;overflow:hidden;
  transition:transform .2s ease,box-shadow .3s ease,background .3s ease;
  letter-spacing:.03em;text-transform:uppercase;font-size:13px;
}
.btn:hover{transform:translateY(-2px);}
.btn:active{transform:translateY(0);}

.btn-accent{
  background:linear-gradient(135deg,var(--accent),var(--accent-dim));
  color:var(--navy);box-shadow:var(--glow-sm);
}
.btn-accent:hover{
  box-shadow:var(--glow-md);background:linear-gradient(135deg,#00E5FF,var(--accent));
}

.btn-primary{
  background:linear-gradient(135deg,var(--blue),#1250C0);
  color:#fff;box-shadow:0 2px 12px var(--blue-glow);
}
.btn-primary:hover{box-shadow:0 0 24px var(--blue-glow);}

.btn-ghost{
  background:rgba(255,255,255,.06);color:#fff;
  border:1px solid rgba(0,212,255,.3);backdrop-filter:blur(8px);
}
.btn-ghost:hover{
  background:rgba(0,212,255,.1);border-color:var(--accent);
  box-shadow:var(--glow-sm);
}

/* 按钮电光扫过动画 */
.btn::before{
  content:'';position:absolute;top:0;left:-100%;width:60%;height:100%;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);
  transition:left .5s ease;
}
.btn:hover::before{left:150%;}

/* ══════════════════════════════════════
   页头 — 毛玻璃 + 底部发光线
   ══════════════════════════════════════ */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(6,13,24,.82);backdrop-filter:blur(20px) saturate(1.4);
  -webkit-backdrop-filter:blur(20px) saturate(1.4);
  height:var(--header-h);
  border-bottom:1px solid rgba(0,212,255,.12);
  box-shadow:0 1px 0 0 rgba(0,212,255,.08), 0 4px 24px rgba(0,0,0,.4);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:100%;gap:24px;}
.brand{display:flex;align-items:center;gap:10px;}
.brand-mark{
  width:32px;height:32px;border-radius:8px;
  background:linear-gradient(135deg,var(--blue),var(--accent));
  box-shadow:var(--glow-sm);position:relative;
}
.brand-mark::after{
  content:'';position:absolute;inset:-2px;border-radius:10px;
  background:linear-gradient(135deg,var(--accent),transparent,var(--blue));z-index:-1;opacity:.5;
}
.brand-name{font-size:21px;font-weight:900;color:#fff;letter-spacing:1px;text-shadow:0 0 20px rgba(0,212,255,.3);}
.brand-domain{font-size:12px;font-weight:600;color:var(--accent);letter-spacing:.5px;}

.site-nav .nav-list{display:flex;gap:28px;list-style:none;margin:0;padding:0;}
.site-nav .nav-list a{
  color:rgba(200,215,235,.75);font-size:14px;font-weight:600;padding:8px 0;
  position:relative;letter-spacing:.04em;text-transform:uppercase;font-size:12px;
  transition:color .2s,text-shadow .2s;
}
.site-nav .nav-list a:hover{color:#fff;text-shadow:0 0 12px rgba(0,212,255,.5);}
.site-nav .nav-list a::after{
  content:"";position:absolute;left:50%;bottom:0;width:0;height:2px;
  background:linear-gradient(90deg,transparent,var(--accent),transparent);
  transition:width .25s ease,left .25s ease;border-radius:2px;
  box-shadow:0 0 8px var(--accent);
}
.site-nav .nav-list a:hover::after{width:120%;left:-10%;}
.header-cta{padding:11px 24px;font-size:12px;letter-spacing:.08em;}

.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px;}
.nav-toggle span{width:24px;height:2px;background:#fff;display:block;border-radius:2px;transition:transform .2s;}

/* ══════════════════════════════════════
   Hero — 渐变底 + 网格 + 光晕 + 扫描线
   ══════════════════════════════════════ */
.hero{
  position:relative;color:#fff;
  padding:100px 0 90px;overflow:hidden;
  /* 多层渐变背景 */
  background:
    radial-gradient(ellipse 80% 60% at 20% 40%, rgba(0,212,255,.07) 0%, transparent 70%),
    radial-gradient(ellipse 60% 50% at 85% 20%, rgba(30,111,217,.08) 0%, transparent 65%),
    radial-gradient(ellipse 100% 80% at 50% 110%, rgba(0,212,255,.05) 0%, transparent 60%),
    linear-gradient(170deg, #060D18 0%, #0B1832 40%, #0A1426 100%);
}

/* 网格纹理 */
.hero::before{
  content:'';position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(0,212,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,.04) 1px, transparent 1px);
  background-size:60px 60px;
  mask-image:radial-gradient(ellipse 80% 70% at 50% 40%, black 30%, transparent 80%);
  -webkit-mask-image:radial-gradient(ellipse 80% 70% at 50% 40%, black 30%, transparent 80%);
  pointer-events:none;
}

/* 顶部高光线 */
.hero::after{
  content:'';position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity:.6;
}

/* 扫描线动画 */
.hero .scan-line{
  position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity:.15;animation:scanDown 4s ease-in-out infinite;
  pointer-events:none;
}
@keyframes scanDown{
  0%{top:0;opacity:0;}
  10%{opacity:.2;}
  90%{opacity:.1;}
  100%{top:100%;opacity:0;}
}

.hero-grid{
  display:grid;grid-template-columns:1fr 500px;gap:64px;align-items:center;
  position:relative;z-index:2;
}
.hero-left{position:relative;z-index:2;}

.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(0,212,255,.1);color:var(--accent);
  padding:9px 18px;border-radius:24px;font-size:12px;font-weight:800;
  margin-bottom:28px;border:1px solid rgba(0,212,255,.2);
  letter-spacing:.1em;text-transform:uppercase;
  backdrop-filter:blur(8px);
  box-shadow:0 0 16px rgba(0,212,255,.1);
}
.hero-badge::before{
  content:'';width:6px;height:6px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 8px var(--accent);animation:pulse 2s ease-in-out infinite;
}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.4;}}

.hero-title{
  font-size:58px;line-height:1.08;color:#fff;margin-bottom:24px;
  text-shadow:0 0 40px rgba(0,212,255,.15);
  letter-spacing:-.03em;
}
.hero-sub{
  font-size:17px;color:rgba(160,185,215,.85);max-width:560px;margin-bottom:36px;
  line-height:1.8;
}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:48px;}

/* 统计数据 — 科技仪表风格 */
.hero-stats{
  display:flex;gap:44px;
  border-top:1px solid rgba(0,212,255,.12);
  padding-top:28px;position:relative;
}
.hero-stats::before{
  content:'';position:absolute;top:0;left:0;width:120px;height:1px;
  background:linear-gradient(90deg, var(--accent), transparent);
  box-shadow:0 0 8px var(--accent);
}
.stat{text-align:center;}
.stat-num{
  font-size:30px;font-weight:900;color:var(--accent);
  text-shadow:0 0 20px rgba(0,212,255,.4);letter-spacing:-.01em;
  display:block;
}
.stat-label{font-size:12px;color:rgba(140,165,195,.7);margin-top:4px;text-transform:uppercase;letter-spacing:.08em;}

/* ══════════════════════════════════════
   Hero 右侧产品图 — 发光边框 + 悬浮 + 倒影
   ══════════════════════════════════════ */
.hero-right{position:relative;z-index:2;}
.hero-img{
  width:100%;aspect-ratio:500/460;border-radius:20px;overflow:hidden;
  position:relative;
  /* 外发光边框 */
  box-shadow:
    0 0 0 1px rgba(0,212,255,.15),
    0 0 30px rgba(0,212,255,.12),
    0 20px 60px rgba(0,0,0,.5),
    inset 0 0 30px rgba(0,212,255,.05);
  transition:box-shadow .4s ease,transform .4s ease;
}
.hero-img:hover{
  box-shadow:
    0 0 0 1px rgba(0,212,255,.3),
    0 0 50px rgba(0,212,255,.2),
    0 24px 70px rgba(0,0,0,.55),
    inset 0 0 40px rgba(0,212,255,.08);
  transform:translateY(-4px) scale(1.01);
}
.hero-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.hero-img:hover img{transform:scale(1.04);}

/* 角标装饰 */
.hero-img::before{
  content:'';position:absolute;top:-1px;left:-1px;right:-1px;bottom:-1px;
  border-radius:20px;padding:1px;
  background:linear-gradient(135deg, var(--accent), transparent 40%, transparent 60%, var(--blue));
  -webkit-mask:linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask:linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;opacity:.5;
  pointer-events:none;
}

/* 产品图底部光晕 */
.hero-img::after{
  content:'';position:absolute;bottom:-20px;left:10%;right:10%;height:40px;
  background:radial-gradient(ellipse, rgba(0,212,255,.2), transparent 70%);
  filter:blur(12px);pointer-events:none;
}

/* ══════════════════════════════════════
   通用区块
   ══════════════════════════════════════ */
.section{padding:96px 0;position:relative;}
.section-light{background:var(--bg);}
.section-dark{
  background:
    radial-gradient(ellipse 70% 50% at 30% 0%, rgba(0,212,255,.04) 0%, transparent 60%),
    linear-gradient(180deg, var(--navy) 0%, var(--navy-2) 100%);
  color:#fff;
}
.section-head{max-width:680px;margin:0 auto 52px;text-align:center;}
.section-eyebrow{
  color:var(--accent);font-weight:800;font-size:12px;
  letter-spacing:3px;text-transform:uppercase;margin-bottom:14px;
  display:inline-block;padding:6px 16px;border-radius:20px;
  background:rgba(0,212,255,.08);border:1px solid rgba(0,212,255,.15);
}
.section-dark .section-eyebrow{color:var(--accent);}
.section-title{font-size:40px;color:inherit;margin-bottom:16px;letter-spacing:-.02em;}
.section-sub{font-size:17px;color:var(--muted);line-height:1.7;}
.section-dark .section-sub{color:rgba(160,185,215,.75);}

/* 区块间分隔光带 */
.section-light+.section-dark::before,
.section-dark+.section-light::before{
  content:'';position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg, transparent, rgba(0,212,255,.2), transparent);
}

/* ══════════════════════════════════════
   卡片 — 玻璃态 + hover 发光
   ══════════════════════════════════════ */
.grid{display:grid;gap:24px;}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}

.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:34px;transition:all .3s cubic-bezier(.25,.46,.45,.94);
  position:relative;overflow:hidden;
}
.card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg, var(--blue), var(--accent));
  opacity:0;transition:opacity .3s;
}
.card:hover{
  transform:translateY(-6px);
  box-shadow:0 20px 50px rgba(6,13,24,.1), 0 0 30px rgba(0,212,255,.06);
  border-color:rgba(0,212,255,.2);
}
.card:hover::before{opacity:1;}

.card-icon{
  width:54px;height:54px;border-radius:14px;
  background:linear-gradient(135deg, rgba(0,212,255,.1), rgba(30,111,217,.08));
  color:var(--accent);display:flex;align-items:center;justify-content:center;
  font-size:24px;margin-bottom:20px;
  border:1px solid rgba(0,212,255,.12);
  box-shadow:0 0 16px rgba(0,212,255,.08);
}
.card-title{font-size:19px;margin-bottom:12px;color:var(--ink);}
.card-text{font-size:14px;color:var(--muted);margin:0;line-height:1.7;}

/* 深色区卡片 */
.section-dark .card{
  background:rgba(255,255,255,.04);
  border-color:rgba(255,255,255,.08);
  backdrop-filter:blur(8px);
}
.section-dark .card:hover{
  background:rgba(255,255,255,.07);
  border-color:rgba(0,212,255,.2);
  box-shadow:0 20px 50px rgba(0,0,0,.3), 0 0 30px rgba(0,212,255,.08);
}
.section-dark .card-title{color:#fff;}
.section-dark .card-text{color:rgba(160,185,215,.7);}

/* ══════════════════════════════════════
   产品卡 — 图片悬浮 + 角标发光
   ══════════════════════════════════════ */
.product{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;transition:all .3s cubic-bezier(.25,.46,.45,.94);
  display:flex;flex-direction:column;position:relative;
}
.product::before{
  content:'';position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg, var(--blue), var(--accent), var(--electric));
  opacity:0;transition:opacity .3s;
}
.product:hover{
  transform:translateY(-8px);
  box-shadow:0 24px 56px rgba(6,13,24,.12), 0 0 40px rgba(0,212,255,.06);
}
.product:hover::before{opacity:1;}

.product-media{
  position:relative;aspect-ratio:4/3;
  background:linear-gradient(135deg, var(--navy-3), var(--navy-4));
  overflow:hidden;
}
.product-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease,filter .3s;}
.product:hover .product-media img{transform:scale(1.06);filter:brightness(1.05);}
.product-badge{
  position:absolute;top:14px;left:14px;
  background:linear-gradient(135deg, var(--accent), var(--accent-dim));
  color:var(--navy);font-size:11px;font-weight:800;
  padding:6px 14px;border-radius:20px;
  letter-spacing:.05em;text-transform:uppercase;
  box-shadow:0 2px 12px rgba(0,212,255,.3);
  z-index:2;
}
.product-body{padding:26px;display:flex;flex-direction:column;gap:14px;flex:1;}
.product-name{font-size:18px;margin:0;}
.product-name a{color:var(--ink);transition:color .2s;}
.product-name a:hover{color:var(--blue);}
.product-excerpt{font-size:14px;color:var(--muted);margin:0;flex:1;line-height:1.6;}
.spec-list{list-style:none;margin:0;padding:0;display:grid;gap:10px;}
.spec-list li{
  display:flex;justify-content:space-between;font-size:13px;
  border-top:1px dashed rgba(0,0,0,.08);padding-top:10px;
}
.spec-list .spec-k{color:var(--muted);font-weight:500;}
.spec-list .spec-v{font-weight:800;color:var(--ink);}
.product-link{
  font-size:13px;font-weight:700;color:var(--accent);
  display:inline-flex;align-items:center;gap:4px;
  transition:gap .2s,color .2s;
}
.product-link:hover{gap:8px;color:var(--blue);}

/* ══════════════════════════════════════
   文章/知识列表
   ══════════════════════════════════════ */
.post-list{display:grid;gap:28px;}
.post-card{
  display:grid;grid-template-columns:300px 1fr;gap:28px;
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;
  transition:all .3s ease;
}
.post-card:hover{
  box-shadow:0 20px 50px rgba(6,13,24,.08);
  transform:translateY(-2px);
}
.post-card .thumb{
  background:linear-gradient(135deg, var(--navy-3), var(--navy-4));
  min-height:220px;overflow:hidden;position:relative;
}
.post-card .thumb::after{
  content:'';position:absolute;bottom:0;left:0;right:0;height:60px;
  background:linear-gradient(transparent, rgba(6,13,24,.3));
}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s;}
.post-card:hover .thumb img{transform:scale(1.05);}
.post-body{padding:30px 30px 30px 0;display:flex;flex-direction:column;justify-content:center;}
.post-cat{
  color:var(--accent);font-size:12px;font-weight:800;
  letter-spacing:.1em;text-transform:uppercase;
}
.post-title{font-size:23px;margin:10px 0;transition:color .2s;}
.post-title a{color:var(--ink);}
.post-title a:hover{color:var(--blue);}
.post-meta{font-size:13px;color:var(--muted);margin-bottom:12px;}

/* ══════════════════════════════════════
   关于页
   ══════════════════════════════════════ */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;}
.about-figure{
  aspect-ratio:4/3;border-radius:var(--radius);
  background:linear-gradient(135deg, var(--navy-3), var(--navy-4));
  overflow:hidden;position:relative;
  box-shadow:var(--glow-md);
}
.about-figure img{width:100%;height:100%;object-fit:cover;}
.about-figure::after{
  content:'';position:absolute;inset:0;border-radius:var(--radius);
  box-shadow:inset 0 0 40px rgba(0,212,255,.08);
  pointer-events:none;
}

/* ══════════════════════════════════════
   表单 — 输入框聚焦发光
   ══════════════════════════════════════ */
.form{display:grid;gap:20px;max-width:560px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field label{font-size:13px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;}
.field input,.field textarea,.field select{
  font-family:inherit;font-size:15px;padding:14px 16px;
  border:1px solid var(--line);border-radius:10px;
  background:#fff;color:var(--ink);
  transition:border-color .2s,box-shadow .2s;
}
.field input:focus,.field textarea:focus,.field select:focus{
  border-color:var(--accent);outline:none;
  box-shadow:0 0 0 3px rgba(0,212,255,.12), 0 0 16px rgba(0,212,255,.08);
}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;}
.contact-info{
  background:
    radial-gradient(ellipse at 0% 0%, rgba(0,212,255,.06) 0%, transparent 60%),
    var(--navy);
  color:#fff;border-radius:var(--radius);padding:42px;
  border:1px solid rgba(0,212,255,.1);
}
.contact-info h3{color:#fff;}
.contact-info a{color:var(--accent);transition:text-shadow .2s;}
.contact-info a:hover{text-shadow:0 0 12px rgba(0,212,255,.5);}
.info-row{display:flex;gap:14px;margin-bottom:20px;align-items:flex-start;}
.info-row .ic{
  color:var(--accent);font-size:20px;flex-shrink:0;
  filter:drop-shadow(0 0 6px rgba(0,212,255,.3));
}

/* ══════════════════════════════════════
   页脚 — 分隔光带 + 层次感
   ══════════════════════════════════════ */
.site-footer{
  background:
    radial-gradient(ellipse 60% 40% at 80% 100%, rgba(0,212,255,.04) 0%, transparent 60%),
    linear-gradient(180deg, var(--navy-2) 0%, var(--navy) 100%);
  color:rgba(200,215,235,.7);padding:68px 0 0;
  position:relative;
}
.site-footer::before{
  content:'';position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg, transparent, rgba(0,212,255,.2), transparent);
}
.footer-inner{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:44px;}
.footer-desc{color:rgba(140,165,195,.8);font-size:15px;margin:18px 0 10px;line-height:1.7;}
.footer-meta{color:rgba(93,112,138,.8);font-size:13px;margin:0;}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:18px;font-weight:800;letter-spacing:.03em;}
.footer-col ul{list-style:none;margin:0;padding:0;display:grid;gap:12px;}
.footer-col a{color:rgba(200,215,235,.6);font-size:14px;transition:color .2s,padding-left .2s;display:inline-block;}
.footer-col a:hover{color:var(--accent);padding-left:4px;}
.footer-bottom{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;
  border-top:1px solid rgba(255,255,255,.06);margin-top:52px;padding:26px 0;
  font-size:13px;color:rgba(93,112,138,.7);
}

/* ══════════════════════════════════════
   响应式
   ══════════════════════════════════════ */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:48px;}
  .hero-right{order:-1;max-width:480px;margin:0 auto;}
  .hero-title{font-size:46px;}
  .hero-img{aspect-ratio:4/3;}
}
@media (max-width:980px){
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr);}
  .about-grid,.contact-grid,.post-card{grid-template-columns:1fr;}
  .post-card .thumb{min-height:220px;}
  .footer-inner{grid-template-columns:1fr 1fr;}
}
@media (max-width:680px){
  .site-nav,.header-cta{display:none;}
  .nav-toggle{display:flex;}
  .site-nav.open{
    display:block;position:absolute;top:var(--header-h);left:0;right:0;
    background:rgba(6,13,24,.97);backdrop-filter:blur(20px);
    padding:20px 28px;border-bottom:1px solid rgba(0,212,255,.12);
    box-shadow:0 8px 32px rgba(0,0,0,.5);
  }
  .site-nav.open .nav-list{flex-direction:column;gap:16px;}
  .hero-title{font-size:36px;}
  .hero{padding:64px 0 56px;}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr;}
  .footer-inner{grid-template-columns:1fr;}
  .section{padding:64px 0;}
  .hero-stats{gap:24px;flex-wrap:wrap;}
  .stat-num{font-size:24px;}
  .section-title{font-size:32px;}
  .btn{padding:13px 24px;font-size:12px;}
}

/* ══════════════════════════════════════
   动画 & 细节增强
   ══════════════════════════════════════ */

/* 数字计数动画（纯CSS模拟） */
@keyframes countUp{
  from{opacity:0;transform:translateY(8px);}
  to{opacity:1;transform:translateY(0);}
}
.stat-num{animation:countUp .6s ease-out both;}
.stat:nth-child(2) .stat-num{animation-delay:.1s;}
.stat:nth-child(3) .stat-num{animation-delay:.2s;}

/* 浮动粒子效果（Hero 背景装饰） */
.hero .particle{
  position:absolute;width:3px;height:3px;border-radius:50%;
  background:var(--accent);opacity:.3;
  animation:float 8s ease-in-out infinite;
  pointer-events:none;
}
@keyframes float{
  0%,100%{transform:translateY(0) scale(1);opacity:.2;}
  50%{transform:translateY(-30px) scale(1.5);opacity:.5;}
}

/* CTA 区脉冲光环 */
@keyframes ringPulse{
  0%{box-shadow:0 0 0 0 rgba(0,212,255,.3);}
  70%{box-shadow:0 0 0 16px rgba(0,212,255,0);}
  100%{box-shadow:0 0 0 0 rgba(0,212,255,0);}
}
.btn-accent{animation:ringPulse 3s ease-out infinite;}

/* 滚动显示动画 */
@keyframes fadeUp{
  from{opacity:0;transform:translateY(24px);}
  to{opacity:1;transform:translateY(0);}
}
.section-head{animation:fadeUp .5s ease both;}