/* roulang page: index */
:root{
  --primary:#1783c6;
  --primary-deep:#0b5b8f;
  --primary-bg:#e9f4fa;
  --primary-bg-2:#f2f8fc;
  --accent:#f07f4e;
  --body-bg:#f7fafc;
  --surface:#ffffff;
  --text-main:#17303e;
  --text-secondary:#637b88;
  --border:#dce9f0;
  --success:#1d9a79;
  --warning:#e6a23c;
  --radius-card:16px;
  --radius-btn:10px;
  --shadow-sm:0 6px 18px rgba(13,68,94,.06);
  --shadow-hover:0 12px 28px rgba(13,68,94,.10);
  --spacing-section:clamp(64px,8vw,112px);
  --header-h:72px;
  --footer-bg:#142f3c;
  --footer-text:#a9c1cd;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  background:var(--body-bg);
  color:var(--text-main);
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%}
.container-fluid{width:100%}

/* ===== 顶部导航 ===== */
.site-header{
  position:sticky;top:0;z-index:100;background:#fff;border-bottom:1px solid var(--border);
}
.nav-wrap{display:flex;align-items:center;gap:20px;height:var(--header-h);flex-wrap:nowrap}
.brand{display:flex;align-items:center;gap:8px;flex-shrink:0}
.brand-icon{
  width:34px;height:34px;border-radius:9px;background:var(--primary);
  display:flex;align-items:center;justify-content:center;color:#fff;font-size:17px;font-weight:700;
}
.brand-name{font-size:20px;font-weight:700;letter-spacing:.5px;color:var(--text-main);white-space:nowrap}
.brand-name em{font-style:normal;color:var(--primary)}
.nav-search{flex:1;max-width:520px;margin:0 auto;position:relative}
.search-form{display:flex;align-items:center;background:#fff;border:2px solid #d3e3ec;border-radius:999px;height:44px;padding:0 6px 0 16px;transition:border-color .2s,box-shadow .2s}
.search-form:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(23,131,198,.15)}
.search-form svg{flex-shrink:0;color:var(--text-secondary)}
.search-form input{border:none;outline:none;flex:1;height:36px;background:transparent;padding:0 12px;font-size:14px;min-width:60px}
.search-form input::placeholder{color:#91a5b0}
.select-cat{
  display:flex;align-items:center;gap:4px;border-left:1px solid var(--border);padding:0 12px;
  font-size:13px;color:var(--text-secondary);cursor:pointer;background:#f7fbfd;height:30px;border-radius:8px;white-space:nowrap;
}
.select-cat svg{width:14px;height:14px}
.search-btn{
  flex-shrink:0;background:var(--primary);color:#fff;border:none;height:32px;padding:0 16px;
  border-radius:999px;font-size:14px;font-weight:600;cursor:pointer;transition:background .18s;
}
.search-btn:hover{background:var(--primary-deep)}
.search-btn:active{transform:translateY(1px)}
.nav-links{display:flex;align-items:center;gap:6px;flex-shrink:0}
.nav-link{
  font-size:15px;color:var(--text-main);padding:8px 12px;border-radius:8px;transition:background .18s,color .18s;font-weight:500;white-space:nowrap;
}
.nav-link:hover{background:var(--primary-bg);color:var(--primary-deep)}
.nav-link.active{color:var(--primary);font-weight:600}
.nav-cta{
  background:var(--primary);color:#fff;border:none;height:38px;padding:0 18px;border-radius:var(--radius-btn);
  font-size:14px;font-weight:600;cursor:pointer;transition:background .18s,transform .18s;white-space:nowrap;
}
.nav-cta:hover{background:var(--primary-deep)}
.nav-cta:active{transform:translateY(1px) scale(.99)}
.search-panel{
  position:absolute;top:50px;left:0;right:0;background:#fff;border:1px solid var(--border);
  border-radius:14px;box-shadow:vars(--shadow-hover);padding:14px;display:none;z-index:20;
}
.search-panel.open{display:block}
.search-panel-item{display:block;padding:9px 12px;border-radius:8px;font-size:14px;color:var(--text-main)}
.search-panel-item:hover{background:var(--primary-bg-2);color:var(--primary-deep)}
.search-panel-tips{font-size:12px;color:var(--text-secondary);padding:4px 12px 10px;border-bottom:1px solid var(--border);margin-bottom:6px}

/* ===== Hero ===== */
.hero{
  background:
    linear-gradient(120deg,rgba(247,250,252,.95) 0%,rgba(233,244,250,.88) 100%),
    url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
  padding:clamp(48px,7vw,88px) 0;
  position:relative;overflow:hidden;
}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:6px;background:rgba(23,131,198,.1);color:var(--primary-deep);
  border:1px solid rgba(23,131,198,.2);border-radius:999px;font-size:12px;font-weight:600;padding:4px 12px;margin-bottom:18px;
}
.hero-badge i{width:6px;height:6px;border-radius:50%;background:var(--success);display:inline-block}
.hero h1{
  font-size:clamp(28px,5vw,42px);line-height:1.3;font-weight:800;color:var(--text-main);letter-spacing:-.5px;margin-bottom:18px;
}
.hero h1 span{color:var(--primary);display:inline-block}
.hero-lead{
  font-size:16px;line-height:1.9;color:var(--text-secondary);max-width:560px;margin-bottom:24px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;cursor:pointer;
  border-radius:var(--radius-btn);font-weight:600;transition:all .18s;text-align:center;
}
.btn-primary{background:var(--primary);color:#fff;padding:12px 24px;font-size:15px}
.btn-primary:hover{background:var(--primary-deep);transform:translateY(-1px);box-shadow:0 8px 20px rgba(23,131,198,.22)}
.btn-primary:active{transform:translateY(1px);box-shadow:none}
.btn-ghost{background:#fff;color:var(--primary-deep);border:1px solid #bcd2e0;padding:12px 24px;font-size:15px}
.btn-ghost:hover{border-color:var(--primary);background:var(--primary-bg-2)}
.btn-ghost:active{transform:translateY(1px)}
.btn:focus-visible,.nav-cta:focus-visible,.search-btn:focus-visible{
  outline:2px solid rgba(23,131,198,.7);outline-offset:2px;
}
.hero-tags{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.hero-tags span.tx{font-size:13px;color:var(--text-secondary);margin-right:4px}
.hero-tag{
  display:inline-flex;align-items:center;background:#fff;border:1px solid #cfe2ed;color:var(--text-main);
  font-size:13px;border-radius:8px;padding:4px 12px;transition:all .18s;font-weight:500;
}
.hero-tag:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-bg-2)}
.hero-media{position:relative}
.hero-img-wrap{position:relative;border-radius:20px;overflow:hidden;box-shadow:var(--shadow-hover)}
.hero-img-wrap img{width:100%;height:auto;aspect-ratio:16/10;object-fit:cover}
.float-badge{
  position:absolute;background:rgba(255,255,255,.95);backdrop-filter:blur(4px);border-radius:12px;
  box-shadow:var(--shadow-hover);padding:8px 12px;font-size:12px;font-weight:600;display:flex;align-items:center;gap:6px;
}
.float-badge .dot{
  width:8px;height:8px;border-radius:50%;
}
.float-badge-1{top:16px;left:-12px;animation:floaty 3s ease-in-out infinite}
.float-badge-2{bottom:20px;right:-8px;animation:floaty 3s ease-in-out 1.2s infinite}
.float-badge .b-orange{background:var(--accent)}
.float-badge .b-green{background:var(--success)}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-5px)}}
.hero-stat-line{display:flex;gap:24px;margin-top:22px;padding-top:18px;border-top:1px solid #dcedf5;flex-wrap:wrap}
.h-stat strong{font-size:20px;color:var(--primary-deep);font-weight:700;font-family:"Segoe UI",-apple-system,sans-serif}
.h-stat span{font-size:13px;color:var(--text-secondary);margin-left:5px}

/* ===== 通用板块标题 ===== */
.section{padding:var(--spacing-section) 0}
.section-bg{background:#fff}
.section-head{max-width:680px;margin-bottom:42px}
.section-head .sub{display:inline-block;font-size:13px;color:var(--primary);font-weight:600;letter-spacing:1px;margin-bottom:8px}
.section-head h2{font-size:clamp(22px,3vw,32px);font-weight:700;line-height:1.4;margin-bottom:12px;color:var(--text-main)}
.section-head p{font-size:15px;line-height:1.8;color:var(--text-secondary)}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}

/* ===== 分类模块 ===== */
.cat-featured{
  display:grid;grid-template-columns:1.1fr .9fr;gap:20px;margin-bottom:20px;
}
.cat-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);
  padding:22px;transition:transform .2s,box-shadow .2s,border-color .2s;position:relative;overflow:hidden;
}
.cat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:#bcd9e8}
.cat-card.active-card{border-color:transparent;box-shadow:var(--shadow-hover)}
.cat-card.active-card::before{content:'';position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--primary)}
.cat-card-top{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:12px}
.cat-icon{
  width:48px;height:48px;border-radius:12px;background:var(--primary-bg);display:flex;align-items:center;
  justify-content:center;color:var(--primary);flex-shrink:0;
}
.cat-icon svg{width:24px;height:24px}
.cat-count{font-size:12px;color:var(--text-secondary);background:var(--primary-bg-2);border-radius:6px;padding:2px 8px;white-space:nowrap}
.cat-card h3{font-size:18px;font-weight:700;margin-bottom:6px;line-height:1.4}
.cat-card p{font-size:14px;color:var(--text-secondary);line-height:1.75;margin-bottom:12px}
.cat-labels{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px}
.cat-label{font-size:12px;padding:3px 8px;background:#f0f6fa;border-radius:6px;color:#4a6b7c;font-weight:400}
.cat-more{display:inline-block;font-size:13px;color:var(--primary);font-weight:600}
.cat-more:hover{color:var(--primary-deep);text-decoration:underline}
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.featured-thumb{margin-top:12px;border-radius:12px;overflow:hidden}
.featured-thumb img{width:100%;aspect-ratio:16/7;object-fit:cover;transition:transform .4s}
.cat-card:hover .featured-thumb img{transform:scale(1.03)}

/* ===== 数据条 ===== */
.stats-band{background:linear-gradient(135deg,var(--primary-bg),var(--primary-bg-2));padding:54px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat-item{padding:12px}
.stat-num{
  font-size:clamp(32px,4vw,46px);font-weight:800;color:var(--primary-deep);
  font-family:"Segoe UI",-apple-system,sans-serif;line-height:1.2;letter-spacing:-1px;
}
.stat-num small{font-size:18px;font-weight:600;margin-left:4px;color:var(--primary)}
.stat-label{font-size:13px;color:var(--text-secondary);margin-top:6px;letter-spacing:.5px}

/* ===== 场景 ===== */
.scene-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:20px}
.scene-card{
  background:#fff;border-radius:var(--radius-card);border:1px solid var(--border);overflow:hidden;
  transition:transform .2s,box-shadow .2s;
}
.scene-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.scene-img{overflow:hidden}
.scene-img img{width:100%;aspect-ratio:16/8;object-fit:cover}
.scene-body{padding:20px 22px 26px}
.scene-body .tag{font-size:13px;color:var(--primary);font-weight:600}
.scene-body h3{font-size:19px;font-weight:700;margin:8px 0 10px;line-height:1.45}
.scene-body p{font-size:14px;color:var(--text-secondary);line-height:1.8}
.scene-col{display:flex;flex-direction:column;gap:20px}

/* ===== 流程 ===== */
.flow-section{background:#fff}
.flow-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative}
.flow-step{
  background:var(--body-bg);border:1px solid var(--border);border-radius:var(--radius-card);padding:24px 22px;
  position:relative;transition:transform .2s,box-shadow .2s;
}
.flow-step:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.flow-num{
  font-size:13px;color:var(--primary);font-weight:700;background:var(--primary-bg);display:inline-block;
  padding:3px 10px;border-radius:999px;margin-bottom:12px;
}
.flow-step .st-ico{
  width:40px;height:40px;border-radius:10px;background:#fff;border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;color:var(--primary);margin-bottom:16px;
}
.flow-step .st-ico svg{width:20px;height:20px}
.flow-step h3{font-size:17px;font-weight:700;margin-bottom:8px}
.flow-step p{font-size:13px;color:var(--text-secondary);line-height:1.8}
.flow-arrow{position:absolute;top:50%;right:-14px;transform:translateY(-50%);color:#b8d5e4;z-index:2}
.flow-arrow svg{width:18px;height:18px;display:block}
.flow-format-list{
  margin-top:44px;display:grid;grid-template-columns:repeat(4,1fr);gap:12px;background:var(--primary-bg-2);
  border-radius:var(--radius-card);padding:22px;
}
.fmt{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-secondary)}
.fmt svg{width:18px;height:18px;color:var(--primary);flex-shrink:0}

/* ===== FAQ ===== */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-item{
  background:#fff;border:1px solid var(--border);border-radius:12px;margin-bottom:12px;overflow:hidden;
  transition:border-color .2s,box-shadow .2s;
}
.faq-item:hover{border-color:#b7d4e4}
.faq-item[open]{box-shadow:var(--shadow-sm);border-color:#b7d4e4}
.faq-q{
  display:flex;justify-content:space-between;align-items:center;padding:18px 22px;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--text-main);list-style:none;position:relative;transition:background .18s;
}
.faq-q::-webkit-details-marker{display:none}
.faq-q .ic{width:26px;height:26px;flex-shrink:0;border-radius:50%;background:var(--primary-bg);display:flex;align-items:center;justify-content:center;color:var(--primary);transition:transform .25s}
.faq-item[open] .faq-q .ic{transform:rotate(45deg);background:var(--primary);color:#fff}
.faq-q .ic svg{width:14px;height:14px;display:block}
.faq-item[open] .faq-q{background:var(--primary-bg-2)}
.faq-a{padding:2px 22px 18px;font-size:14px;line-height:1.85;color:var(--text-secondary)}

/* ===== 提交区 ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.contact-left h2{font-size:clamp(22px,3vw,30px);font-weight:700;margin-bottom:14px;line-height:1.4}
.contact-left p{font-size:15px;color:var(--text-secondary);margin-bottom:22px;line-height:1.8}
.contact-points{display:grid;gap:12px;margin-bottom:24px}
.c-point{display:flex;align-items:flex-start;gap:10px;background:#fff;border:1px solid var(--border);border-radius:10px;padding:11px 14px}
.c-point svg{width:18px;height:18px;color:var(--primary);flex-shrink:0;margin-top:3px}
.c-point span{font-size:14px;color:var(--text-main)}
.contact-form-card{
  background:#fff;border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow-sm);padding:28px;
}
.contact-form-card h3{font-size:18px;font-weight:700;margin-bottom:20px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:13px;font-weight:600;color:var(--text-main);margin-bottom:6px}
.form-group label .req{color:#e05b5b;font-style:normal}
.form-group input,.form-group select,.form-group textarea{
  width:100%;border:1px solid var(--border);border-radius:10px;padding:10px 12px;background:#fff;
  font-size:14px;transition:border-color .18s,box-shadow .18s;outline:none;
}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{
  border-color:var(--primary);box-shadow:0 0 0 3px rgba(23,131,198,.12);
}
.form-group textarea{resize:vertical;min-height:84px}
.form-group select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23637b88' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:36px}
.form-note{font-size:12px;color:var(--text-secondary);line-height:1.6}
.btn-submit{
  width:100%;background:var(--primary);color:#fff;padding:12px 18px;border:none;border-radius:10px;
  font-size:15px;font-weight:600;cursor:pointer;transition:background .18s,transform .18s;margin-top:4px;
}
.btn-submit:hover{background:var(--primary-deep)}
.btn-submit:active{transform:translateY(1px)}
.form-tip{font-size:13px;color:var(--text-secondary);margin-top:12px;text-align:center}

/* ===== 页脚 ===== */
.site-footer{background:var(--footer-bg);color:var(--footer-text);padding:64px 0 24px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.3fr .9fr .9fr 1.1fr;gap:36px;margin-bottom:44px}
.footer-brand .fd-brand{display:flex;align-items:center;gap:9px;color:#fff;font-size:19px;font-weight:700;margin-bottom:14px}
.footer-brand .fd-logo{width:30px;height:30px;border-radius:8px;background:var(--primary);display:flex;align-items:center;justify-content:center;color:#fff;font-size:15px;font-weight:700}
.footer-brand p{font-size:13px;line-height:1.9;max-width:300px}
.footer-col h4{font-size:14px;color:#fff;font-weight:600;margin-bottom:14px}
.footer-col ul{display:grid;gap:8px}
.footer-col a{
  font-size:13px;color:var(--footer-text);transition:color .18s,padding-left .18s;display:inline-block;line-height:1.6;
}
.footer-col a:hover{color:#fff;padding-left:3px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding-top:22px;display:flex;flex-wrap:wrap;
  gap:10px;justify-content:space-between;font-size:12px;color:#7da0b0;
}
.footer-bottom a:hover{color:#fff}
.footer-bottom .dot{opacity:.5;margin:0 4px}

/* ===== 响应式 ===== */
@media(max-width:1200px){
  .cat-grid{grid-template-columns:repeat(3,1fr)}
  .flow-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .flow-arrow{display:none}
}
@media(max-width:992px){
  .nav-search{max-width:360px}
  .nav-link{padding:8px 8px;font-size:14px}
  .hero-grid{grid-template-columns:1fr;gap:28px}
  .hero-media{order:2}
  .cat-featured{grid-template-columns:1fr}
  .cat-grid{grid-template-columns:repeat(2,1fr)}
  .scene-layout{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .contact-grid{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .flow-format-list{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .site-header .nav-wrap{flex-wrap:wrap;height:auto;padding:10px 0}
  .brand{width:calc(100% - 50px)}
  .nav-search{order:3;width:100%;max-width:none}
  .nav-links{order:2;display:none;width:100%;flex-direction:column;align-items:flex-start;gap:0;background:#fff;border-top:1px solid var(--border);padding:6px 0}
  .nav-links.open{display:flex}
  .nav-link{width:100%;padding:10px 0;font-size:15px;border-bottom:1px solid #f0f5f8}
  .nav-cta{order:4;display:none;width:100%;justify-content:center;height:42px;margin-top:6px}
  .nav-cta.open{display:flex}
  .menu-toggle{order:2;width:42px;height:42px;display:flex;align-items:center;justify-content:center;background:none;border:1px solid var(--border);border-radius:10px;cursor:pointer;color:var(--text-main)}
  .cat-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr 1fr}
  .flow-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .hero-actions .btn{flex:1 1 auto;justify-content:center}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;text-align:center}
  .scene-body h3{font-size:18px}
}
@media(max-width:520px){
  .container{padding:0 18px}
  .brand-name{font-size:18px}
  .hero{padding-top:36px}
  .search-form{padding-left:12px}
  .select-cat{display:none}
  .stats-grid{grid-template-columns:1fr 1fr;gap:8px}
  .stat-num{font-size:30px}
  .cat-card{padding:18px}
  .contact-form-card{padding:20px}
  .float-badge{display:none}
  .hero-tag{font-size:12px;padding:2px 10px}
  .flow-format-list{grid-template-columns:1fr}
}

/* roulang page: category1 */
/* copy from site design system */
:root{
 --primary:#1783c6;
 --primary-deep:#0b5b8f;
 --primary-bg:#e9f4fa;
 --primary-bg-2:#f2f8fc;
 --accent:#f07f4e;
 --body-bg:#f7fafc;
 --surface:#ffffff;
 --text-main:#17303e;
 --text-secondary:#637b88;
 --border:#dce9f0;
 --success:#1d9a79;
 --warning:#e6a23c;
 --radius-card:16px;
 --radius-btn:10px;
 --shadow-sm:0 6px 18px rgba(13,68,94,.06);
 --shadow-hover:0 12px 28px rgba(13,68,94,.10);
 --spacing-section:clamp(64px,8vw,112px);
 --header-h:72px;
 --footer-bg:#142f3c;
 --footer-text:#a9c1cd;
}
html{scroll-behavior:smooth}
body{
 margin:0;
 font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
 background:var(--body-bg);
 color:var(--text-main);
 font-size:16px;
 line-height:1.75;
 -webkit-font-smoothing:antialiased;
}
*,*::before,*::after{box-sizing:border-box}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%}
/* ===== header ===== */
.site-header{position:sticky;top:0;z-index:100;background:#fff;border-bottom:1px solid var(--border)}
.nav-wrap{display:flex;align-items:center;gap:20px;height:var(--header-h);flex-wrap:nowrap}
.brand{display:flex;align-items:center;gap:8px;flex-shrink:0}
.brand-icon{width:34px;height:34px;border-radius:9px;background:var(--primary);display:flex;align-items:center;justify-content:center;color:#fff;font-size:17px;font-weight:700}
.brand-name{font-size:20px;font-weight:700;letter-spacing:.5px;color:var(--text-main);white-space:nowrap}
.brand-name em{font-style:normal;color:var(--primary)}
.nav-search{flex:1;max-width:520px;margin:0 auto;position:relative}
.search-form{display:flex;align-items:center;background:#fff;border:2px solid #d3e3ec;border-radius:999px;height:44px;padding:0 6px 0 16px;transition:border-color .2s,box-shadow .2s}
.search-form:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(23,131,198,.15)}
.search-form svg{flex-shrink:0;color:var(--text-secondary)}
.search-form input{border:none;outline:none;flex:1;height:36px;background:transparent;padding:0 12px;font-size:14px;min-width:60px}
.search-form input::placeholder{color:#91a5b0}
.select-cat{display:flex;align-items:center;gap:4px;border-left:1px solid var(--border);padding:0 12px;font-size:13px;color:var(--text-secondary);cursor:pointer;background:#f7fbfd;height:30px;border-radius:8px;white-space:nowrap}
.select-cat svg{width:14px;height:14px}
.search-btn{flex-shrink:0;background:var(--primary);color:#fff;border:none;height:32px;padding:0 16px;border-radius:999px;font-size:14px;font-weight:600;cursor:pointer;transition:background .18s}
.search-btn:hover{background:var(--primary-deep)}
.search-btn:active{transform:translateY(1px)}
.nav-links{display:flex;align-items:center;gap:6px;flex-shrink:0}
.nav-link{font-size:15px;color:var(--text-main);padding:8px 12px;border-radius:8px;transition:background .18s,color .18s;font-weight:500;white-space:nowrap}
.nav-link:hover{background:var(--primary-bg);color:var(--primary-deep)}
.nav-link.active{color:var(--primary);font-weight:600}
.nav-cta{background:var(--primary);color:#fff;border:none;height:38px;padding:0 18px;border-radius:var(--radius-btn);font-size:14px;font-weight:600;cursor:pointer;transition:background .18s,transform .18s;white-space:nowrap}
.nav-cta:hover{background:var(--primary-deep)}
.nav-cta:active{transform:translateY(1px) scale(.99)}
.search-panel{position:absolute;top:50px;left:0;right:0;background:#fff;border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow-hover);padding:14px;display:none;z-index:20}
.search-panel.open{display:block}
.search-panel-item{display:block;padding:9px 12px;border-radius:8px;font-size:14px;color:var(--text-main)}
.search-panel-item:hover{background:var(--primary-bg-2);color:var(--primary-deep)}
.search-panel-tips{font-size:12px;color:var(--text-secondary);padding:4px 12px 10px;border-bottom:1px solid var(--border);margin-bottom:6px}
/* ===== buttons ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;cursor:pointer;border-radius:var(--radius-btn);font-weight:600;transition:all .18s;text-align:center}
.btn-primary{background:var(--primary);color:#fff;padding:12px 24px;font-size:15px}
.btn-primary:hover{background:var(--primary-deep);transform:translateY(-1px);box-shadow:0 8px 20px rgba(23,131,198,.22)}
.btn-primary:active{transform:translateY(1px);box-shadow:none}
.btn-ghost{background:#fff;color:var(--primary-deep);border:1px solid #bcd2e0;padding:12px 24px;font-size:15px}
.btn-ghost:hover{border-color:var(--primary);background:var(--primary-bg-2)}
.btn-ghost:active{transform:translateY(1px)}
.btn:focus-visible,.nav-cta:focus-visible,.search-btn:focus-visible{outline:2px solid rgba(23,131,198,.7);outline-offset:2px}
/* ===== category page ===== */
.category-hero{background:url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;padding:clamp(48px,7vw,86px) 0 40px;position:relative}
.category-hero::before{content:'';position:absolute;inset:0;background:linear-gradient(120deg,rgba(247,250,252,.97) 0%,rgba(233,244,250,.9) 60%,rgba(233,244,250,.75) 100%)}
.category-hero .container{position:relative;z-index:2}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-secondary);margin-bottom:20px;flex-wrap:wrap}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:#b0c6d3}
.cate-title{font-size:clamp(28px,5vw,42px);font-weight:800;line-height:1.35;margin:0 0 12px;color:var(--text-main)}
.cate-title span{color:var(--primary)}
.cate-desc{font-size:16px;color:var(--text-secondary);max-width:640px;line-height:1.9;margin:0 0 24px}
/* filter bar */
.filter-bar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;background:#fff;padding:14px;border-radius:var(--radius-card);box-shadow:var(--shadow-sm);border:1px solid var(--border)}
.filter-label{width:40px;height:30px;background:var(--primary-bg);border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--primary-deep);font-weight:700}
.chip{width:30px;height:30px;border-radius:50%;background:var(--primary-bg);border:none;cursor:pointer;color:var(--primary-deep);font-size:14px;transition:background .18s;flex-shrink:0}
.chip:hover{background:var(--primary);color:#fff}
.chip-apply{width:auto;padding:0 14px;border-radius:999px;height:30px;font-size:13px;font-weight:600;background:var(--primary);color:#fff;border:none;cursor:pointer}
.chip-group{display:flex;flex-wrap:wrap;gap:8px}
.chip{
 display:inline-flex;align-items:center;padding:4px 14px;border-radius:999px;font-size:13px;
 background:#fff;border:1px solid var(--border);color:var(--text-secondary);cursor:pointer;
 transition:all .18s;white-space:nowrap;font-weight:500;height:32px;
}
.chip:hover{border-color:var(--primary);color:var(--primary-deep);background:var(--primary-bg)}
.chip.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.chip .dot{width:6px;height:6px;border-radius:50%;background:var(--success);margin-right:6px;display:inline-block}
/* layout */
.category-main{padding:clamp(36px,5vw,64px) 0 var(--spacing-section)}
.cate-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:28px;align-items:start}
.resource-list{display:flex;flex-direction:column;gap:18px}
.feature-card{background:var(--surface);border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--border);box-shadow:var(--shadow-sm);transition:box-shadow .2s,transform .2s;position:relative}
.feature-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px)}
.feature-banner{display:block;height:260px;overflow:hidden;border-bottom:1px solid var(--border);background:var(--primary-bg-2)}
.feature-banner img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
.feature-card:hover .feature-banner img{transform:scale(1.02)}
.feature-flag{position:absolute;top:14px;left:14px;background:var(--accent);color:#fff;font-size:12px;font-weight:600;padding:3px 10px;border-radius:8px;line-height:1.6}
.feature-content{padding:22px 24px 24px}
.feature-content h3{font-size:19px;margin:0 0 8px;font-weight:700;line-height:1.5}
.feature-content p{font-size:14px;color:var(--text-secondary);line-height:1.75;margin:0 0 16px}
.resource-meta{display:flex;align-items:center;flex-wrap:wrap;gap:6px 14px;font-size:13px;color:var(--text-secondary);margin-bottom:16px;list-style:none;padding:0}
.resource-meta li{display:flex;align-items:center;gap:5px}
.resource-meta li::before{content:'';width:4px;height:4px;border-radius:50%;background:#c1d5e1}
.resource-actions{display:flex;gap:10px;flex-wrap:wrap}
/* resource row card */
.resource-list-item{background:var(--surface);border-radius:var(--radius-card);border:1px solid var(--border);overflow:hidden;box-shadow:var(--shadow-sm);transition:box-shadow .2s,transform .2s;display:flex;flex-direction:row;align-items:center;gap:0}
.resource-list-item:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.resource-thumb{width:170px;height:130px;flex-shrink:0;background:var(--primary-bg-2);overflow:hidden;position:relative}
.resource-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
.resource-list-item:hover .resource-thumb img{transform:scale(1.03)}
.resource-info{flex:1;padding:16px 18px;min-width:0}
.resource-info .tag-free{font-size:12px;background:rgba(29,154,121,.12);color:var(--success);padding:2px 8px;border-radius:6px;margin-right:6px;font-weight:600}
.resource-info .tag-update{font-size:12px;background:var(--primary-bg);color:var(--primary-deep);padding:2px 8px;border-radius:6px;margin-right:6px;font-weight:600}
.resource-title{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:17px;font-weight:700;line-height:1.5;margin-bottom:5px}
.resource-excerpt{font-size:14px;color:var(--text-secondary);margin:6px 0 9px;line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.resource-meta{display:flex;flex-wrap:wrap;gap:4px 14px;font-size:13px;color:var(--text-secondary);margin:6px 0 0;list-style:none;padding:0}
.resource-action{flex-shrink:0;padding:0 22px}
.resource-action .btn{padding:8px 16px}
/* sidebar */
.cate-sidebar{display:flex;flex-direction:column;gap:22px;position:sticky;top:calc(var(--header-h) + 20px)}
.side-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);box-shadow:var(--shadow-sm);padding:20px}
.side-card h4{font-size:15px;font-weight:700;margin:0 0 14px;padding-bottom:10px;border-bottom:1px solid var(--border);color:var(--text-main)}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
.tag-item{display:inline-block;font-size:13px;color:var(--text-secondary);background:var(--body-bg);border:1px solid var(--border);border-radius:8px;padding:3px 10px;transition:all .18s}
.tag-item:hover{background:var(--primary-bg);color:var(--primary-deep);border-color:var(--primary)}
.side-update-list{list-style:none;padding:0;margin:0}
.side-update-list li{padding:11px 0;border-bottom:1px solid #edf3f7}
.side-update-list li:last-child{border-bottom:none}
.side-update-list a{display:block;font-size:14px;color:var(--text-main);line-height:1.5;transition:color .18s;font-weight:500;margin-bottom:4px}
.side-update-list a:hover{color:var(--primary)}
.side-update-list .time-green{font-size:12px;color:var(--success);display:flex;align-items:center;gap:6px}
.side-update-list .time-blue{font-size:12px;color:var(--primary);display:flex;align-items:center;gap:6px}
.side-update-list .time-green::before,.side-update-list .time-blue::before{content:'';width:6px;height:6px;border-radius:50%;background:currentColor}
.side-cta-block{background:linear-gradient(135deg,var(--primary-bg-2),var(--primary-bg));border:1px dashed rgba(23,131,198,.4);text-align:center;padding:24px 20px}
.side-cta-block h4{border-bottom:none;padding-bottom:0;font-size:16px;margin-bottom:8px;color:var(--primary-deep);text-align:center}
.side-cta-block p{font-size:13px;color:var(--text-secondary);line-height:1.7;margin-bottom:14px}
.side-help{background:var(--primary-bg);border:none}
.side-help h4{border-bottom-color:rgba(255,255,255,.3)}
.help-question-panel p{font-size:14px;color:var(--text-secondary);margin-bottom:8px}
/* pagination */
.pagination{display:flex;justify-content:center;align-items:center;gap:6px;margin-top:24px;flex-wrap:wrap}
.page-item{width:38px;height:38px;border-radius:10px;background:#fff;border:1px solid var(--border);display:flex;align-items:center;justify-content:center;color:var(--text-secondary);font-size:15px;font-weight:600;transition:all .18s}
.page-item:hover{border-color:var(--primary);color:var(--primary)}
.page-item.active{background:var(--primary);border-color:var(--primary);color:#fff;cursor:default}
/* FAQ category */
.faq-section-inline{background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);margin-bottom:32px;padding:clamp(28px,4vw,48px)}
.faq-section-inline h2{font-size:clamp(22px,3vw,28px);margin:0 0 26px;text-align:center;font-weight:700}
.faq-list{max-width:920px;margin:0 auto}
details.faq-item{background:#fff;border-bottom:1px solid var(--border)}
details.faq-item:first-of-type{border-top:1px solid var(--border)}
details.faq-item summary{cursor:pointer;padding:20px 46px 20px 18px;font-size:16px;font-weight:600;color:var(--text-main);transition:color .18s;position:relative;list-style:none}
details.faq-item summary::-webkit-details-marker{display:none}
details.faq-item summary:hover{color:var(--primary)}
details.faq-item summary::after,.faq-item summary::before{content:'';position:absolute;right:20px;top:50%;width:16px;height:2px;background:var(--primary);transition:all .25s;display:block;transform:translateY(-50%)}
details.faq-item summary::before{transform:translateY(-50%)}
details[open] summary::after{transform:translateY(-50%) rotate(45deg)}
details[open] summary::before{transform:translateY(-50%) rotate(135deg)}
.faq-answer{padding:0 18px 20px;font-size:15px;color:var(--text-secondary);max-width:860px}
/* footer full */
.site-footer{background:var(--footer-bg) !important;color:var(--footer-text) !important;padding:48px 0 0;margin-top:39px}
.site-footer .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:36px;padding-bottom:36px}
.site-footer a{color:#a9c1cd}
.site-footer a:hover{color:#fff}
.site-footer .fd-brand{display:flex;align-items:center;gap:8px;font-size:20px;color:#fff;font-weight:700;}
.site-footer .fd-brand .fd-logo{display:inline-flex;width:32px;height:32px;background:var(--primary);color:#fff;border-radius:8px;align-items:center;justify-content:center;font-weight:800;font-size:16px}
.site-footer p{font-size:14px;line-height:1.9;color:#90b0c0;margin:10px 0 0}
.site-footer h4{font-size:16px;color:#dbeef7;margin:0 0 14px;font-weight:600}
.site-footer .footer-col ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:5px}
.site-footer .footer-col li{margin:6px 0;font-size:14px;color:#a9c1cd}
.site-footer .footer-bottom{display:flex;justify-content:space-between;align-items:center;padding:22px 0;border-top:1px solid rgba(255,255,255,.08);font-size:13px;color:#90b0c0}
.dot{display:inline-block;margin:0 5px}
/* media query */
@media (max-width:992px){
 .nav-wrap{flex-wrap:wrap;height:auto;padding:10px 0}
 .brand{width:100%;justify-content:center}
 .nav-links{display:flex;width:100%;overflow-x:auto;padding-bottom:10px;justify-content:flex-start;position:static}
 .nav-link{white-space:nowrap;font-size:14px;padding:8px 10px;position:static}
 .nav-search{order:2;max-width:100%;width:100%;margin:0 0 10px}
 .nav-links{order:3}
 .nav-cta{display:none}
 .site-header{position:relative}
 .cate-grid{grid-template-columns:minmax(0,1fr);}
 .cate-sidebar{position:static}
}
@media (max-width:768px){
 .hero-grid{grid-template-columns:1fr}
 .site-footer .footer-grid{grid-template-columns:1fr 1fr;gap:24px}
 .feature-banner{height:200px}
 .resource-list-item{flex-direction:row}
 .resource-thumb{width:120px;height:110px}
 .site-footer .footer-bottom{flex-direction:column;gap:10px;text-align:center}
}
@media (max-width:520px){
 .hero-grid{grid-template-columns:1fr}
 .category-hero{padding-top:40px}
 .resource-list-item{flex-direction:column}
 .resource-thumb{width:100%;height:140px}
 .site-footer .footer-grid{grid-template-columns:1fr}
 .breadcrumb{font-size:12px}
 .cate-grid{grid-template-columns:minmax(0,1fr)}
 .pagination{margin-top:24px}
 .filter-bar{flex-direction:column;align-items:flex-start}
 .chip{width:auto}
}