/* =========================================================
   common.css —— 公共样式（三个页面共用）
   包含：设计变量 / 重置 / 容器(70%) / 按钮 / 头部 header /
        底部 footer / 区块通用 / 搜索框 / 模板卡片 / CTA /
        返回顶部 / Toast / 滚动动画
   页面专属样式见：index.css（首页）、list.css（列表页）、detail.css（详情页）
   ========================================================= */

/* ---------- 1. 设计变量 ---------- */
:root{
  --primary:#4f46e5;
  --primary-light:#6366f1;
  --primary-dark:#3730a3;
  --accent:#06b6d4;
  --text:#0f172a;
  --muted:#64748b;
  --border:#e2e8f0;
  --soft:#f8fafc;
  --radius:16px;
  --shadow-sm:0 1px 2px rgba(15,23,42,.06);
  --shadow:0 8px 30px rgba(15,23,42,.08);
  --shadow-lg:0 22px 50px rgba(79,70,229,.18);
  --header-h:72px;
}

/* ---------- 2. 重置 ---------- */
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:"PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  color:var(--text);line-height:1.65;background:#fff;
  overflow-x:hidden;-webkit-font-smoothing:antialiased;
  padding-top:var(--header-h);
}
a{text-decoration:none;color:inherit;}
img{max-width:100%;display:block;}
ul{list-style:none;}
button{font-family:inherit;}

/* ---------- 3. 全局容器：宽度 70% ---------- */
.container{width:70%;max-width:1400px;margin:0 auto;}
@media (max-width:1200px){ .container{width:80%;} }
@media (max-width:960px){ .container{width:88%;} }
@media (max-width:820px){ .container{width:92%;} }
@media (max-width:560px){ .container{width:94%;} }

/* ---------- 4. 通用按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 28px;border-radius:999px;font-size:15px;font-weight:600;
  border:none;cursor:pointer;transition:.28s cubic-bezier(.2,.7,.3,1);
  white-space:nowrap;line-height:1;
}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),#7c3aed);
  color:#fff;box-shadow:0 10px 22px rgba(79,70,229,.3);
}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 16px 32px rgba(79,70,229,.42);}
.btn-ghost{background:#fff;color:var(--text);border:1px solid var(--border);box-shadow:var(--shadow-sm);}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-3px);}
.btn-sm{padding:10px 20px;font-size:14px;}

/* ---------- 5. 头部 header（公共部分，三页一致） ---------- */
.header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(255,255,255,.78);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;transition:.3s;
}
.header.scrolled{box-shadow:0 4px 24px rgba(15,23,42,.07);border-bottom-color:var(--border);background:rgba(255,255,255,.92);}
.nav{display:flex;align-items:center;justify-content:space-between;height:var(--header-h);gap:24px;}
.logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:800;letter-spacing:-.5px;}
.logo-mark{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--primary),#7c3aed);color:#fff;font-size:19px;font-weight:800;
  box-shadow:0 8px 18px rgba(79,70,229,.35);
}
.nav-links{display:flex;align-items:center;gap:6px;}
.nav-links a{
  position:relative;padding:8px 14px;font-size:15px;color:#334155;font-weight:500;
  border-radius:8px;transition:.25s;
}
.nav-links a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:linear-gradient(90deg,var(--primary),var(--accent));
  border-radius:2px;transform:scaleX(0);transform-origin:left;transition:.3s;
}
.nav-links a:hover{color:var(--primary);}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1);}
.nav-links a.active{color:var(--primary);font-weight:600;}
/* 导航下拉菜单（网站模板集） */
.nav-item{position:relative;}
.nav-links .caret{display:inline-block;font-size:10px;margin-left:3px;transition:transform .2s;vertical-align:middle;}
.has-dropdown.open .caret{transform:rotate(180deg);}
.nav-dropdown{
  position:absolute;top:100%;left:0;min-width:172px;background:#fff;border:1px solid var(--border);
  border-radius:14px;box-shadow:var(--shadow-lg);padding:6px;display:flex;flex-direction:column;gap:2px;
  opacity:0;visibility:hidden;transform:translateY(8px);transition:.22s ease;z-index:60;
}
.nav-dropdown::before{content:"";position:absolute;top:-12px;left:0;right:0;height:12px;}
.has-dropdown:hover .nav-dropdown,.has-dropdown.open .nav-dropdown{opacity:1;visibility:visible;transform:translateY(0);}
.nav-dropdown a{padding:10px 14px;border-radius:10px;color:var(--text);font-size:14px;font-weight:500;white-space:nowrap;}
.nav-dropdown a::after{display:none;}
.nav-dropdown a:hover{background:#eef2ff;color:var(--primary);}
.nav-actions{display:flex;align-items:center;gap:16px;}
.link-login{font-size:15px;font-weight:500;color:#334155;transition:.25s;}
.link-login:hover{color:var(--primary);}
.menu-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--border);background:#fff;
  border-radius:10px;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:.3s;}
.menu-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.menu-toggle.open span:nth-child(2){opacity:0;}
.menu-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

@media (max-width:820px){
  .menu-toggle{display:flex;}
  .nav-links{
    position:absolute;top:var(--header-h);left:0;right:0;flex-direction:column;align-items:stretch;gap:0;
    background:#fff;padding:12px 6%;border-bottom:1px solid var(--border);
    box-shadow:0 20px 40px rgba(15,23,42,.1);
    transform:translateY(-12px);opacity:0;visibility:hidden;transition:.3s;
  }
  .nav-links.open{transform:translateY(0);opacity:1;visibility:visible;}
  .nav-links a{padding:14px 10px;border-radius:10px;}
  .nav-links a::after{display:none;}
  .nav-links a.active{background:#eef2ff;}
  .nav-item{position:static;}
  .nav-dropdown{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:none;padding:2px 0 2px 10px;background:transparent;gap:0;}
  .nav-dropdown::before{display:none;}
  .nav-actions .link-login{display:none;}
}

/* ---------- 6. 页面区块通用 ---------- */
.section{padding:92px 0;}
.section.soft{background:linear-gradient(180deg,#f8fafc,#fff);}
.section-head{text-align:center;max-width:660px;margin:0 auto 56px;}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:2.5px;
  text-transform:uppercase;color:var(--primary);margin-bottom:12px;
}
.section-head h2{font-size:clamp(26px,3.6vw,40px);font-weight:800;letter-spacing:-1px;line-height:1.25;}
.section-head p{color:var(--muted);margin-top:14px;font-size:15.5px;}

/* ---------- 7. 搜索框（首页 / 列表页共用组件） ---------- */
.search-box{
  display:flex;align-items:center;gap:10px;max-width:660px;margin:36px auto 0;
  background:#fff;border:1px solid var(--border);border-radius:999px;padding:8px 8px 8px 22px;
  box-shadow:var(--shadow);transition:.3s;
}
.search-box:focus-within{border-color:var(--primary-light);box-shadow:0 16px 40px rgba(79,70,229,.2);}
.search-icon{font-size:17px;opacity:.6;}
.search-box input{flex:1;border:none;outline:none;background:transparent;font-size:15px;color:var(--text);min-width:0;}
.search-box input::placeholder{color:#94a3b8;}

/* ---------- 8. 模板卡片（首页 / 列表页 / 详情页推荐 共用）
   每张卡片都是 <li>，标题为超链接，并用「拉伸链接」让整卡可点击 ---------- */
.tpl-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:26px;}
.tpl-card{position:relative;background:#fff;border:1px solid var(--border);border-radius:20px;padding:12px;transition:.4s cubic-bezier(.2,.7,.3,1);}
.tpl-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:transparent;}
.tpl-card.fade-out{opacity:0;transform:scale(.94);}
.tpl-thumb{position:relative;aspect-ratio:4/3;border-radius:14px;overflow:hidden;background:var(--soft);}
.tpl-thumb img{width:100%;height:100%;object-fit:cover;display:block;}
.tpl-mask{
  position:absolute;inset:0;z-index:3;display:flex;align-items:flex-end;justify-content:center;gap:10px;padding-bottom:22px;
  background:linear-gradient(180deg,rgba(15,23,42,0) 35%,rgba(15,23,42,.8));opacity:0;transition:.35s;
  pointer-events:none; /* 让空白处点击穿透到整卡超链接 */
}
.tpl-card:hover .tpl-mask{opacity:1;}
.tpl-mask .btn-preview,.tpl-mask .btn-download{
  display:inline-block;padding:9px 20px;border-radius:999px;font-size:13.5px;font-weight:600;
  cursor:pointer;border:none;transition:.25s;line-height:1.4;text-decoration:none;pointer-events:auto;
}
.btn-preview{background:#fff;color:var(--text);}
.btn-preview:hover{transform:translateY(-3px);}
.btn-download{background:linear-gradient(135deg,var(--primary),#7c3aed);color:#fff;box-shadow:0 8px 18px rgba(79,70,229,.45);}
.btn-download:hover{transform:translateY(-3px);}
.tpl-info{padding:18px 12px 12px;}
.tpl-info h3{font-size:16.5px;font-weight:700;margin-bottom:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.tpl-info h3 a{color:inherit;display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
/* 拉伸链接：::after 铺满整张卡片，卡片任意位置可点击进入详情页 */
.tpl-link::after{content:"";position:absolute;inset:0;z-index:2;border-radius:20px;}
.tpl-link:focus-visible::after{outline:2px solid var(--primary);outline-offset:3px;}
.tpl-info p{font-size:13.5px;color:var(--muted);margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.tpl-meta{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px;}
.tags{display:flex;gap:6px;flex-wrap:wrap;}
.tags span{font-size:12px;padding:3px 10px;border-radius:6px;background:#eef2ff;color:var(--primary);font-weight:500;}
.tpl-meta .price{font-size:15px;font-weight:800;color:#ef4444;}
.tpl-meta .price.free{color:#10b981;}

/* ---------- 9. CTA 通用行动条（首页 / 详情页共用） ---------- */
.cta{
  position:relative;overflow:hidden;border-radius:28px;padding:64px 40px;text-align:center;color:#fff;
  background:linear-gradient(135deg,#4f46e5,#7c3aed 50%,#0891b2);box-shadow:var(--shadow-lg);
}
.cta::before,.cta::after{content:"";position:absolute;border-radius:50%;background:rgba(255,255,255,.1);}
.cta::before{width:320px;height:320px;top:-140px;left:-80px;}
.cta::after{width:240px;height:240px;bottom:-120px;right:-60px;}
.cta h2{position:relative;font-size:clamp(24px,3.4vw,36px);font-weight:800;letter-spacing:-.8px;}
.cta p{position:relative;margin:14px auto 32px;max-width:520px;color:rgba(255,255,255,.88);}
.cta-actions{position:relative;display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}
.cta .btn-primary{position:relative;background:#fff;color:var(--primary);}
.cta .btn-ghost{position:relative;background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.35);box-shadow:none;}
.cta .btn-ghost:hover{background:rgba(255,255,255,.24);color:#fff;}

/* ---------- 10. 底部 footer（公共部分，三页一致） ---------- */
.footer{background:#0b1020;color:#94a3b8;padding:70px 0 0;margin-top:96px;}
.footer-top{display:grid;grid-template-columns:1.6fr repeat(3,1fr);gap:40px;padding-bottom:52px;border-bottom:1px solid rgba(255,255,255,.08);}
.footer-brand .logo{color:#fff;margin-bottom:16px;}
.footer-brand p{font-size:14px;max-width:300px;line-height:1.8;}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:18px;}
.footer-col a{display:block;font-size:14px;padding:6px 0;transition:.25s;}
.footer-col a:hover{color:#fff;transform:translateX(4px);}
.copyright{text-align:center;font-size:13px;padding:26px 0;color:#64748b;}

/* ---------- 11. 返回顶部 & Toast ---------- */
.to-top{
  position:fixed;right:26px;bottom:26px;width:48px;height:48px;border-radius:50%;border:none;cursor:pointer;
  display:grid;place-items:center;font-size:18px;color:#fff;
  background:linear-gradient(135deg,var(--primary),#7c3aed);box-shadow:0 12px 26px rgba(79,70,229,.4);
  opacity:0;visibility:hidden;transform:translateY(16px);transition:.35s;z-index:90;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{transform:translateY(-4px);}
.toast{
  position:fixed;left:50%;top:92px;transform:translate(-50%,-24px);
  background:#0f172a;color:#fff;padding:13px 26px;border-radius:12px;font-size:14px;font-weight:500;
  box-shadow:0 16px 40px rgba(15,23,42,.28);opacity:0;visibility:hidden;transition:.35s;z-index:200;max-width:90%;text-align:center;
}
.toast.show{opacity:1;visibility:visible;transform:translate(-50%,0);}

/* ---------- 12. 滚动显现动画 ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:.8s cubic-bezier(.2,.7,.3,1);}
.reveal.show{opacity:1;transform:translateY(0);}

/* ---------- 13. 公共响应式 ---------- */
@media (max-width:960px){
  .footer-top{grid-template-columns:1fr 1fr;gap:34px;}
}
@media (max-width:820px){
  .section{padding:70px 0;}
}
@media (max-width:560px){
  .footer-top{grid-template-columns:1fr;}
  .cta{padding:48px 24px;}
  .tpl-grid{grid-template-columns:1fr;}
}