/* ============================================================
   WENEED 官网样式 — 深蓝 / 科技蓝 主题，响应式
   ============================================================ */
:root{
  --blue-900:#0f2a5e;
  --blue-800:#143a7a;
  --blue-700:#1453b8;
  --blue-500:#2f7bf0;
  --blue-300:#7fb0f5;
  --gray-50:#f5f7fb;
  --gray-100:#eef2f8;
  --gray-200:#e2e8f2;
  --gray-500:#6b7280;
  --gray-700:#374151;
  --gray-900:#1f2937;
  --white:#fff;
  --radius:14px;
  --shadow:0 10px 30px rgba(15,42,94,.10);
  --shadow-sm:0 4px 14px rgba(15,42,94,.08);
  --maxw:1180px;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;
  color:var(--gray-900);
  background:var(--white);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--blue-700);text-decoration:none;}
a:hover{color:var(--blue-500);}
img{max-width:100%;display:block;}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px;}
.muted{color:var(--gray-500);}
h1,h2,h3,h4{color:var(--blue-900);line-height:1.25;}

/* ---------- 按钮 ---------- */
.btn-primary,.btn-ghost,.btn-outline{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:12px 24px;border-radius:10px;font-weight:600;font-size:15px;cursor:pointer;
  border:1px solid transparent;transition:.18s;white-space:nowrap;
}
.btn-primary{background:var(--blue-700);color:#fff;}
.btn-primary:hover{background:var(--blue-800);color:#fff;}
.btn-ghost{background:transparent;color:var(--blue-700);border-color:var(--blue-300);}
.btn-ghost:hover{background:var(--gray-100);}
.btn-outline{background:#fff;color:var(--blue-700);border-color:var(--blue-700);}
.btn-outline:hover{background:var(--blue-700);color:#fff;}
.btn-primary.sm,.btn-ghost.sm{padding:8px 16px;font-size:14px;}

/* ---------- 头部 ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--gray-200);}
.nav-wrap{display:flex;align-items:center;gap:18px;height:68px;}
.brand{display:flex;align-items:center;gap:10px;}
.brand-text{display:flex;flex-direction:column;line-height:1.1;}
.brand-text strong{font-size:15px;color:var(--blue-900);}
.brand-text em{font-style:normal;font-size:11px;color:var(--blue-500);letter-spacing:.3px;}
.main-nav{display:flex;gap:6px;margin-left:auto;}
.main-nav a{padding:8px 14px;border-radius:8px;color:var(--gray-700);font-weight:500;font-size:15px;}
.main-nav a:hover{background:var(--gray-100);color:var(--blue-700);}
.main-nav a.active{color:var(--blue-700);background:var(--gray-100);}
.nav-right{display:flex;align-items:center;gap:10px;}
.lang-switch{padding:7px 12px;border:1px solid var(--gray-200);border-radius:8px;font-size:13px;color:var(--gray-700);}
.lang-switch:hover{background:var(--gray-100);}
.menu-toggle{display:none;background:none;border:0;font-size:24px;cursor:pointer;color:var(--blue-900);}

/* ---------- Flash ---------- */
.flash{margin:14px auto;padding:12px 16px;border-radius:10px;font-size:14px;}
.flash-success{background:#e8f7ee;color:#1e7e44;}
.flash-error{background:#ffe9e9;color:#c0392b;}
.flash-info{background:#e8f0fe;color:#1453b8;}

/* ---------- Hero ---------- */
.hero{
  position:relative;color:#fff;overflow:hidden;
  /* 深色遮罩层：确保文字在任意背景图上都清晰可读 */
  --hero-overlay: linear-gradient(180deg,
    rgba(15,42,94,.72) 0%,
    rgba(20,58,122,.60) 50%,
    rgba(31,41,55,.55) 100%);
}
.hero::before{content:"";position:absolute;inset:0;
  background-image:var(--hero-overlay);
  z-index:0;pointer-events:none;}
.hero::after{
  content:"";position:absolute;inset:0;z-index:0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:44px 44px;opacity:.4;pointer-events:none;
}
.hero-inner{position:relative;z-index:1;max-width:var(--maxw);margin:0 auto;padding:96px 20px 104px;}
.hero h1{color:#fff;font-size:clamp(28px,4.4vw,52px);margin:0 0 16px;font-weight:800;letter-spacing:.5px;}
.hero p.lead{font-size:clamp(15px,2vw,20px);color:#d6e4ff;max-width:640px;margin:0 0 32px;}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;}
.hero .btn-ghost{color:#fff;border-color:rgba(255,255,255,.5);}
.hero .btn-ghost:hover{background:rgba(255,255,255,.12);}
.hero-stats{display:flex;gap:38px;margin-top:54px;flex-wrap:wrap;}
.hero-stats .stat strong{display:block;font-size:30px;color:#fff;}
.hero-stats .stat span{color:#bcd2f5;font-size:13px;}

/* ---------- 区块通用 ---------- */
.section{padding:72px 0;}
.section.alt{background:var(--gray-50);}
.section-head{text-align:center;max-width:720px;margin:0 auto 44px;}
.section-head h2{font-size:clamp(24px,3vw,34px);margin:0 0 10px;}
.section-head p{color:var(--gray-500);margin:0;}

/* ---------- 卡片网格 ---------- */
.grid{display:grid;gap:24px;}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}

.card{background:#fff;border:1px solid var(--gray-200);border-radius:var(--radius);padding:26px;
  box-shadow:var(--shadow-sm);transition:.2s;}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--blue-300);}
.card .ico{width:52px;height:52px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--blue-700),var(--blue-500));color:#fff;font-size:24px;margin-bottom:16px;}
.card h3{margin:0 0 8px;font-size:19px;}
.card p{color:var(--gray-500);margin:0;font-size:14.5px;}

/* ---------- 产品块 ---------- */
.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;}
.feature-row.reverse{direction:rtl;}
.feature-row.reverse>*{direction:ltr;}
.feature-visual{height:280px;border-radius:var(--radius);
  background:linear-gradient(135deg,var(--blue-800),var(--blue-500));position:relative;overflow:hidden;}
.feature-visual::before{content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.18) 1px,transparent 1px);background-size:22px 22px;}
.feature-text h3{font-size:24px;margin:0 0 12px;}
.feature-text p{color:var(--gray-500);}
.feature-text ul{margin:14px 0 22px;padding-left:18px;color:var(--gray-700);}
.feature-text li{margin:6px 0;}

/* ---------- 资源列表 ---------- */
.res-card{display:flex;flex-direction:column;gap:10px;}
.res-card .tag{display:inline-block;align-self:flex-start;font-size:12px;padding:3px 10px;border-radius:20px;
  background:var(--blue-300);color:var(--blue-900);font-weight:600;}
.res-card h3{font-size:17px;margin:0;}
.res-card p{color:var(--gray-500);font-size:14px;margin:0;flex:1;}
.res-meta{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--gray-500);}

/* ---------- 产品/资源页侧栏 ---------- */
.layout-2{display:grid;grid-template-columns:240px 1fr;gap:34px;}
.sidebar{background:var(--gray-50);border:1px solid var(--gray-200);border-radius:var(--radius);padding:18px;align-self:start;position:sticky;top:88px;}
.sidebar h4{margin:0 0 12px;font-size:15px;}
.sidebar a{display:block;padding:9px 12px;border-radius:8px;color:var(--gray-700);font-size:14px;}
.sidebar a:hover,.sidebar a.active{background:var(--blue-700);color:#fff;}

/* ---------- 详情页 ---------- */
.detail-hero{background:linear-gradient(135deg,var(--blue-900),var(--blue-700));color:#fff;padding:54px 0;}
.detail-hero h1{color:#fff;font-size:32px;margin:0;}
.detail-hero .sub{color:#cfe0ff;margin-top:8px;}
.spec-table{width:100%;border-collapse:collapse;margin:20px 0;}
.spec-table th,.spec-table td{border:1px solid var(--gray-200);padding:12px 14px;text-align:left;font-size:14.5px;}
.spec-table th{background:var(--gray-50);width:160px;color:var(--blue-900);}
.content-body{font-size:15.5px;color:var(--gray-700);line-height:1.85;}
.content-body p{margin:0 0 14px;}

/* ---------- 表单 ---------- */
.auth-wrap{max-width:460px;margin:60px auto;}
.form-card{background:#fff;border:1px solid var(--gray-200);border-radius:var(--radius);padding:34px;box-shadow:var(--shadow-sm);}
.form-card h2{margin:0 0 6px;font-size:24px;}
.form-card .sub{color:var(--gray-500);margin:0 0 22px;font-size:14px;}
.field{margin-bottom:16px;}
.field label{display:block;font-weight:600;margin-bottom:6px;font-size:14px;}
.field input,.field textarea,.field select{width:100%;padding:11px 13px;border:1px solid var(--gray-200);
  border-radius:9px;font-size:15px;font-family:inherit;transition:.15s;}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--blue-500);box-shadow:0 0 0 3px rgba(47,123,240,.15);}
.field textarea{resize:vertical;min-height:120px;}
.code-row{display:flex;gap:10px;}
.code-row input{flex:1;}
.code-row button{flex:0 0 auto;white-space:nowrap;}
.form-note{font-size:13px;color:var(--gray-500);margin-top:14px;text-align:center;}
.form-error{background:#ffe9e9;color:#c0392b;padding:10px 12px;border-radius:8px;font-size:14px;margin-bottom:14px;}
.form-ok{background:#e8f7ee;color:#1e7e44;padding:10px 12px;border-radius:8px;font-size:14px;margin-bottom:14px;}
.dev-hint{background:#fff8e1;color:#8a6d00;padding:10px 12px;border-radius:8px;font-size:13px;margin-bottom:14px;}

/* ---------- 文章 / 新闻 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{background:#fff;border:1px solid var(--gray-200);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:.2s;}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
.news-thumb{height:170px;background:linear-gradient(135deg,var(--blue-800),var(--blue-500));}
.news-body{padding:20px;}
.news-body .date{font-size:12px;color:var(--gray-500);}
.news-body h3{font-size:18px;margin:8px 0;line-height:1.4;}
.news-body p{color:var(--gray-500);font-size:14px;margin:0 0 12px;}
.breadcrumb{padding:18px 0;font-size:13px;color:var(--gray-500);}
.breadcrumb a{color:var(--gray-500);}

/* ---------- 关于我们 ---------- */
.about-section{margin-bottom:40px;}
.about-section h3{font-size:22px;border-left:4px solid var(--blue-700);padding-left:12px;margin:0 0 16px;}
.timeline{position:relative;padding-left:26px;}
.timeline::before{content:"";position:absolute;left:7px;top:4px;bottom:4px;width:2px;background:var(--gray-200);}
.timeline .item{position:relative;margin-bottom:22px;}
.timeline .item::before{content:"";position:absolute;left:-23px;top:5px;width:12px;height:12px;border-radius:50%;background:var(--blue-700);}
.timeline .year{font-weight:700;color:var(--blue-700);}

/* ---------- 下载列表（我的下载） ---------- */
.dl-list{display:flex;flex-direction:column;gap:12px;}
.dl-item{display:flex;align-items:center;gap:14px;padding:16px 18px;border:1px solid var(--gray-200);border-radius:12px;background:#fff;}
.dl-item .ico{width:42px;height:42px;border-radius:10px;background:var(--gray-100);display:grid;place-items:center;font-size:20px;}
.dl-item .meta{flex:1;}
.dl-item .meta strong{display:block;font-size:15px;}
.dl-item .meta span{font-size:12px;color:var(--gray-500);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--blue-900);color:#cdddf7;margin-top:40px;padding:54px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px;}
.footer-grid h4{color:#fff;font-size:15px;margin:0 0 14px;}
.footer-grid a{display:block;color:#bcd2f5;font-size:14px;margin-bottom:8px;}
.footer-grid a:hover{color:#fff;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;margin-bottom:12px;}
.footer-brand img{border-radius:8px;}
.lbms-btn{display:inline-block;margin-top:4px;background:var(--blue-700);color:#fff!important;padding:9px 14px;border-radius:9px;font-weight:600;}
.lbms-btn:hover{background:var(--blue-500);}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:40px;padding:18px 20px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;font-size:13px;}
.footer-bottom a{color:#bcd2f5;}

/* ---------- 响应式 ---------- */
@media (max-width:980px){
  .grid-4{grid-template-columns:repeat(2,1fr);}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:760px){
  .main-nav{position:absolute;top:68px;left:0;right:0;background:#fff;flex-direction:column;
    padding:10px 20px;border-bottom:1px solid var(--gray-200);display:none;}
  .main-nav.open{display:flex;}
  .menu-toggle{display:block;}
  .nav-right .btn-ghost{display:none;}
  .grid-3,.grid-2,.grid-4,.news-grid{grid-template-columns:1fr;}
  .feature-row{grid-template-columns:1fr;}
  .layout-2{grid-template-columns:1fr;}
  .sidebar{position:static;}
  .hero-inner{padding:64px 20px 72px;}
  .hero-stats{gap:24px;}
  .footer-grid{grid-template-columns:1fr;}
}