/* roulang page: index */
:root{
  --primary:#1F4E9C;
  --primary-deep:#163C7A;
  --primary-light:#3B6FC4;
  --primary-08:rgba(31,78,156,.08);
  --primary-12:rgba(31,78,156,.12);
  --accent:#FF7A2F;
  --accent-deep:#E4621A;
  --accent-light:#FFB07A;
  --teal:#12A594;
  --bg:#F4F7FC;
  --card:#FFFFFF;
  --soft:#EEF3FB;
  --line:#E3E9F2;
  --text:#0F1B2D;
  --text-sub:#4A5A72;
  --text-weak:#8A98AD;
  --panel:#101A2B;
  --panel-sub:#9FB0C9;
  --radius-xl:20px;
  --radius:16px;
  --radius-sm:10px;
  --shadow-card:0 2px 10px rgba(16,27,45,.06),0 12px 32px rgba(16,27,45,.06);
  --shadow-hover:0 6px 18px rgba(31,78,156,.10),0 20px 44px rgba(16,27,45,.10);
  --shadow-nav:0 4px 14px rgba(16,27,45,.08),0 16px 40px rgba(16,27,45,.08);
  --t:200ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.drawer-open{overflow:hidden}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color var(--t),background var(--t),border-color var(--t)}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:96px 0;scroll-margin-top:120px}
.section--soft{background:var(--soft)}
.section--dark{background:var(--panel);color:#fff}
.section-head{max-width:760px;margin-bottom:40px}
.section-head--center{max-width:820px;margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--primary);
  background:var(--primary-08);border-radius:999px;padding:5px 14px;margin-bottom:16px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent)}
.section-title{font-size:clamp(24px,3vw,34px);font-weight:700;letter-spacing:.2px;line-height:1.4}
.section-title--light{color:#fff}
.section-sub{margin-top:14px;color:var(--text-sub);font-size:16px;line-height:1.85}
.section--dark .section-sub{color:var(--panel-sub)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background var(--t),color var(--t),box-shadow var(--t),transform var(--t),border-color var(--t);
  white-space:nowrap;
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(255,122,47,.24)}
.btn-primary:hover{background:var(--accent-deep);transform:translateY(-1px);box-shadow:0 10px 22px rgba(255,122,47,.28)}
.btn-primary:active{transform:translateY(1px);box-shadow:0 4px 10px rgba(255,122,47,.22)}
.btn-outline{background:transparent;color:var(--primary);border-color:rgba(31,78,156,.28)}
.btn-outline:hover{background:var(--primary-08);border-color:var(--primary);transform:translateY(-1px)}
.btn-outline:active{transform:translateY(1px)}
.btn-solid{background:var(--primary);color:#fff}
.btn-solid:hover{background:var(--primary-deep);transform:translateY(-1px)}
.btn-ghost{background:#fff;color:var(--primary);border-color:var(--line)}
.btn-ghost:hover{background:var(--primary-08);border-color:var(--primary)}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}
.btn-sm{height:40px;padding:0 18px;font-size:14px}

.tag{
  display:inline-flex;align-items:center;
  font-size:12.5px;font-weight:600;line-height:1;
  padding:6px 12px;border-radius:999px;
  background:var(--primary-08);color:var(--primary);
}
.tag--accent{background:var(--accent);color:#fff}
.tag--teal{background:rgba(18,165,148,.12);color:var(--teal)}

.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-card);padding:24px;
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.icon-box{
  width:44px;height:44px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:var(--primary-08);color:var(--primary);flex:none;
  transition:background var(--t),color var(--t);
}
.icon-box svg{width:22px;height:22px;stroke-width:1.8}

/* ============ 顶部导航 ============ */
.site-header{position:sticky;top:0;z-index:90;padding:16px 0;transition:padding var(--t)}
.site-header.scrolled{padding:8px 0}
.nav-panel{
  display:flex;align-items:center;gap:20px;
  background:rgba(255,255,255,.96);backdrop-filter:blur(10px);
  border:1px solid var(--line);border-radius:var(--radius-xl);
  box-shadow:var(--shadow-nav);
  padding:12px 20px;
  transition:box-shadow var(--t),padding var(--t);
}
.site-header.scrolled .nav-panel{padding:8px 20px;box-shadow:0 6px 18px rgba(16,27,45,.12),0 20px 44px rgba(16,27,45,.10)}
.brand{display:flex;align-items:center;gap:10px;flex:none;padding-right:20px;border-right:1px solid var(--line)}
.brand-mark{
  width:34px;height:34px;border-radius:10px;flex:none;
  background:linear-gradient(135deg,var(--primary) 0%,var(--primary-light) 100%);
  position:relative;overflow:hidden;
}
.brand-mark::after{
  content:"";position:absolute;right:-6px;bottom:-6px;width:20px;height:20px;border-radius:6px;
  background:var(--accent);opacity:.9;
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:.2px;color:var(--text)}
.nav-links{display:flex;align-items:center;gap:8px;flex:1}
.nav-item{
  display:flex;align-items:center;gap:8px;
  font-size:14.5px;font-weight:600;color:var(--text-sub);
  padding:9px 14px;border-radius:var(--radius-sm);
  border-left:3px solid transparent;
  transition:background var(--t),color var(--t),border-color var(--t);
}
.nav-item svg{width:18px;height:18px;stroke-width:1.8;color:var(--primary-light)}
.nav-item:hover{background:var(--primary-08);color:var(--primary)}
.nav-item.active{background:var(--primary-12);color:var(--primary);border-left-color:var(--primary)}
.nav-cta{display:flex;align-items:center;gap:12px;padding-left:20px;border-left:1px solid var(--line);flex:none}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:#fff;align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform var(--t),opacity var(--t)}
.nav-toggle.active span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-drawer{
  display:none;position:fixed;left:0;right:0;top:0;bottom:0;z-index:89;
  background:rgba(244,247,252,.99);padding:96px 20px 32px;overflow-y:auto;
}
.nav-drawer.open{display:block}
.drawer-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.drawer-item{
  display:flex;flex-direction:column;gap:8px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:18px;box-shadow:var(--shadow-card);
}
.drawer-item strong{font-size:15px;font-weight:600}
.drawer-item span{font-size:13px;color:var(--text-weak);line-height:1.6}
.drawer-cta{margin-top:20px}

/* ============ 首屏 ============ */
.hero{position:relative;padding:64px 0 80px;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(31,78,156,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(31,78,156,.05) 1px,transparent 1px);
  background-size:44px 44px;
  -webkit-mask-image:linear-gradient(180deg,#000 0%,transparent 78%);
  mask-image:linear-gradient(180deg,#000 0%,transparent 78%);
}
.hero::after{
  content:"";position:absolute;top:-120px;right:-160px;width:520px;height:520px;
  background:linear-gradient(140deg,rgba(31,78,156,.10),rgba(255,122,47,.10));
  transform:rotate(24deg);border-radius:80px;pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center}
.hero-copy{animation:riseIn .6s ease both}
.hero h1{
  font-size:clamp(30px,4.4vw,52px);font-weight:700;line-height:1.24;letter-spacing:-.5px;
  margin:16px 0 20px;
}
.hero h1 em{font-style:normal;color:var(--primary)}
.hero-sub{font-size:17px;color:var(--text-sub);line-height:1.85;max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-media{position:relative;animation:riseIn .6s .12s ease both}
.hero-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-xl);
  box-shadow:var(--shadow-hover);background:var(--soft);
}
.hero-float{
  position:absolute;left:-28px;bottom:32px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
  box-shadow:var(--shadow-hover);padding:16px 18px;min-width:210px;
}
.hero-float .hf-label{font-size:12.5px;color:var(--text-weak)}
.hero-float .hf-value{font-size:22px;font-weight:700;color:var(--primary);line-height:1.3;margin-top:2px}
.hero-float .hf-note{font-size:12.5px;color:var(--teal);font-weight:600;margin-top:4px}
@keyframes riseIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}

/* 信任条 */
.trust-bar{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
  margin-top:56px;padding:24px;border-radius:var(--radius);
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-card);
}
.trust-item{display:flex;align-items:center;gap:14px}
.trust-item .tk{font-size:24px;font-weight:700;color:var(--primary);line-height:1.2}
.trust-item .tl{font-size:13.5px;color:var(--text-sub)}

/* ============ 卖点 ============ */
.adv-grid{display:grid;grid-template-columns:1.35fr 1fr;grid-template-rows:auto auto;gap:24px}
.adv-lg{
  grid-row:span 2;display:flex;flex-direction:column;gap:20px;padding:28px;
}
.adv-lg img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:12px;background:var(--soft)}
.adv-lg h3{font-size:20px;font-weight:600;margin-top:4px}
.adv-lg p{font-size:14.5px;color:var(--text-sub);line-height:1.75}
.adv-points{display:flex;flex-direction:column;gap:10px;margin-top:4px}
.adv-points li{display:flex;gap:10px;font-size:14px;color:var(--text-sub);line-height:1.7}
.adv-points li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--teal);margin-top:10px;flex:none}
.adv-sm{display:flex;gap:16px;align-items:flex-start}
.adv-sm h3{font-size:17px;font-weight:600;margin-bottom:6px}
.adv-sm p{font-size:14px;color:var(--text-sub);line-height:1.72}

/* ============ 演示 ============ */
.demo-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.demo-media{position:relative}
.demo-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--radius);box-shadow:var(--shadow-hover);background:var(--soft)}
.demo-step{
  position:absolute;top:-16px;left:-16px;width:52px;height:52px;border-radius:14px;
  background:var(--accent);color:#fff;font-size:18px;font-weight:700;
  display:flex;align-items:center;justify-content:center;box-shadow:0 10px 24px rgba(255,122,47,.28);
}
.demo-list{display:flex;flex-direction:column;gap:18px;margin-top:8px}
.demo-list li{
  display:flex;gap:16px;padding:18px 20px;border-radius:var(--radius);
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-card);
  transition:transform var(--t),box-shadow var(--t);
}
.demo-list li:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.demo-list .idx{font-size:14px;font-weight:700;color:var(--accent);flex:none;padding-top:2px}
.demo-list strong{display:block;font-size:16px;font-weight:600;margin-bottom:4px}
.demo-list p{font-size:14px;color:var(--text-sub);line-height:1.72}

/* ============ 证据 ============ */
.proof-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  margin-bottom:40px;
}
.stat{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow-card);
}
.stat .num{font-size:32px;font-weight:700;color:var(--primary);line-height:1.2;letter-spacing:-.5px}
.stat .lbl{font-size:13.5px;color:var(--text-sub);margin-top:6px}
.stat .src{font-size:12.5px;color:var(--text-weak);margin-top:10px;padding-top:10px;border-top:1px dashed var(--line)}
.quote-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.quote-card{position:relative;padding:28px 28px 24px}
.quote-card::before{
  content:"”";position:absolute;top:6px;left:22px;font-size:64px;line-height:1;
  color:var(--primary-12);font-family:Georgia,serif;
}
.quote-card p{position:relative;font-size:15px;color:var(--text-sub);line-height:1.85;margin-top:20px}
.quote-card .q-src{position:relative;margin-top:16px;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--text-weak)}

/* ============ 价格 ============ */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}
.price-card{display:flex;flex-direction:column;position:relative;padding:28px}
.price-card.is-featured{border:1px solid var(--primary);box-shadow:var(--shadow-hover)}
.price-card.is-featured::before{
  content:"";position:absolute;left:0;right:0;top:0;height:3px;background:var(--accent);
  border-radius:var(--radius) var(--radius) 0 0;
}
.price-badge{
  position:absolute;top:-13px;right:24px;background:var(--accent);color:#fff;
  font-size:12.5px;font-weight:600;padding:5px 14px;border-radius:999px;
  box-shadow:0 6px 16px rgba(255,122,47,.28);
}
.price-name{display:inline-flex;align-self:flex-start;font-size:13px;font-weight:600;color:var(--primary);background:var(--primary-08);padding:5px 12px;border-radius:999px}
.price-value{display:flex;align-items:baseline;gap:6px;margin:18px 0 6px}
.price-value .pv{font-size:36px;font-weight:700;color:var(--text);letter-spacing:-1px;line-height:1}
.price-value .pu{font-size:13.5px;color:var(--text-weak)}
.price-note{font-size:13.5px;color:var(--text-sub);min-height:44px}
.price-lines{display:flex;flex-direction:column;gap:12px;margin:22px 0 26px;flex:1}
.price-lines li{display:flex;gap:10px;font-size:14px;color:var(--text-sub);line-height:1.7}
.price-lines li svg{width:16px;height:16px;flex:none;margin-top:5px;color:var(--teal);stroke-width:2.2}
.price-card .btn{width:100%}

/* ============ 资讯 ============ */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap}
.news-more{font-size:14.5px;font-weight:600;color:var(--primary);display:inline-flex;align-items:center;gap:6px}
.news-more:hover{color:var(--accent)}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-card);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:rgba(31,78,156,.24)}
.news-thumb{background:var(--soft);min-height:180px}
.news-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:12px;flex:1}
.news-title{
  font-size:16.5px;font-weight:600;line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color var(--t);
}
.news-card:hover .news-title{color:var(--primary)}
.news-desc{
  font-size:14px;color:var(--text-sub);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--text-weak);
}
.news-arrow{color:var(--primary);font-weight:700;transition:transform var(--t)}
.news-card:hover .news-arrow{transform:translateX(3px)}
.news-empty{
  min-height:240px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  background:#fff;border:1px dashed var(--line);border-radius:var(--radius);padding:40px;text-align:center;
}
.empty-icon{
  width:56px;height:56px;border-radius:50%;background:var(--soft);
  display:flex;align-items:center;justify-content:center;color:var(--primary-light);
}
.empty-icon svg{width:26px;height:26px;stroke-width:1.8}
.news-empty p{font-size:14.5px;color:var(--text-sub)}
.skeleton{background:linear-gradient(90deg,#EEF3FB 25%,#E2EAF6 37%,#EEF3FB 63%);background-size:400% 100%;animation:shimmer 1.4s ease infinite}
@keyframes shimmer{0%{background-position:100% 50%}100%{background-position:0 50%}}

/* ============ FAQ ============ */
.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow-card);overflow:hidden}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  background:none;border:0;text-align:left;
  padding:20px 24px;font-size:16px;font-weight:600;color:var(--text);
  transition:color var(--t);
}
.faq-q:hover{color:var(--primary)}
.faq-mark{
  width:28px;height:28px;border-radius:50%;flex:none;background:var(--primary-08);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:18px;line-height:1;
  transition:transform var(--t),background var(--t),color var(--t);
}
.faq-item.open .faq-mark{background:var(--accent);color:#fff;transform:rotate(135deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height var(--t)}
.faq-a-inner{padding:0 24px 22px;border-top:1px solid var(--line);margin-top:0;padding-top:18px}
.faq-a-inner p{font-size:15px;color:var(--text-sub);line-height:1.8}

/* ============ 联系 ============ */
.contact-grid{display:grid;grid-template-columns:1.25fr 1fr;gap:24px;align-items:stretch}
.form-card{padding:32px}
.form-card h3{font-size:20px;font-weight:600;margin-bottom:8px}
.form-card .form-tip{font-size:13.5px;color:var(--text-weak);margin-bottom:24px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}
.field label{font-size:13.5px;font-weight:600;color:var(--text-sub)}
.field input,.field select,.field textarea{
  width:100%;background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:0 14px;height:48px;font-size:15px;color:var(--text);
  transition:border-color var(--t),box-shadow var(--t),background var(--t);
}
.field textarea{height:auto;min-height:112px;padding:12px 14px;line-height:1.7;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:var(--text-weak)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);box-shadow:0 0 0 4px var(--primary-12);
}
.field.error input,.field.error textarea,.field.error select{border-color:#C0392B}
.field .msg{font-size:13px;color:#C0392B;display:none}
.field.error .msg{display:block}
.field.success .msg{display:block;color:var(--teal)}
.form-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:6px}
.form-status{font-size:13.5px;color:var(--teal);font-weight:600;display:none}
.form-status.show{display:inline}
.contact-side{
  background:var(--soft);border:1px solid var(--line);border-radius:var(--radius);
  padding:32px;display:flex;flex-direction:column;gap:22px;
}
.contact-side h3{font-size:18px;font-weight:600}
.contact-line{display:flex;gap:14px;align-items:flex-start}
.contact-line .cl-label{font-size:13px;color:var(--text-weak)}
.contact-line .cl-value{font-size:15px;font-weight:600;color:var(--text);word-break:break-all}
.contact-note{
  margin-top:auto;padding:16px;border-radius:12px;background:#fff;border:1px solid var(--line);
  font-size:13.5px;color:var(--text-sub);line-height:1.75;
}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:80;
  display:inline-flex;align-items:center;gap:10px;
  background:var(--accent);color:#fff;font-size:15px;font-weight:600;
  padding:14px 24px;border-radius:999px;box-shadow:0 12px 30px rgba(255,122,47,.32);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity var(--t),transform var(--t),background var(--t),box-shadow var(--t),visibility var(--t);
}
.float-cta.show{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta:hover{background:var(--accent-deep);transform:translateY(-2px)}
.float-cta svg{width:18px;height:18px;stroke-width:2}

/* ============ 页脚 ============ */
.site-footer{background:var(--panel);color:#fff;padding:72px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{background:linear-gradient(135deg,var(--primary-light),var(--primary))}
.footer-brand .brand-text{color:#fff;font-size:17px;font-weight:700}
.footer-desc{font-size:13.8px;color:var(--panel-sub);line-height:1.85;max-width:320px}
.footer-social{display:flex;gap:12px;margin-top:20px}
.footer-social a{
  width:38px;height:38px;border-radius:10px;border:1px solid rgba(159,176,201,.24);
  display:flex;align-items:center;justify-content:center;color:var(--panel-sub);
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t);
}
.footer-social a:hover{background:rgba(255,122,47,.14);color:var(--accent-light);border-color:rgba(255,122,47,.4);transform:translateY(-2px)}
.footer-social svg{width:18px;height:18px;stroke-width:1.8}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:18px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:13.5px;color:var(--panel-sub);display:inline-block;transition:color var(--t),transform var(--t)}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-contact{display:flex;flex-direction:column;gap:12px}
.footer-contact .fc-item{font-size:13.5px;color:var(--panel-sub);line-height:1.7;word-break:break-all}
.footer-contact .fc-item strong{color:#fff;font-weight:600;display:block;font-size:13px;margin-bottom:2px}
.footer-bottom{
  border-top:1px solid rgba(159,176,201,.16);padding:22px 0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom p{font-size:13px;color:var(--panel-sub)}
.footer-bottom .fb-links{display:flex;gap:18px}
.footer-bottom .fb-links a{font-size:13px;color:var(--panel-sub)}
.footer-bottom .fb-links a:hover{color:#fff}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .hero-grid{gap:40px}
}
@media (max-width:1024px){
  .container{padding:0 24px}
  .section{padding:72px 0}
  .nav-links{display:none}
  .nav-cta .btn{display:none}
  .nav-toggle{display:flex}
  .brand{border-right:0;padding-right:0}
  .nav-panel{justify-content:space-between}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-media{order:-1}
  .hero-float{left:12px;bottom:16px}
  .adv-grid{grid-template-columns:1fr}
  .adv-lg{grid-row:auto}
  .demo-grid{grid-template-columns:1fr;gap:36px}
  .proof-stats{grid-template-columns:repeat(2,1fr)}
  .price-grid{grid-template-columns:1fr;gap:28px}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  .section{padding:56px 0}
  .container{padding:0 20px}
  .hero{padding:40px 0 56px}
  .hero-sub{font-size:16px}
  .hero-actions .btn{flex:1 1 auto}
  .trust-bar{grid-template-columns:1fr;gap:18px;padding:20px}
  .quote-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .form-card,.contact-side{padding:24px}
  .news-head{align-items:flex-start}
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;justify-content:center;
    padding:16px 20px;transform:translateY(100%);
    box-shadow:0 -8px 24px rgba(16,27,45,.14);
  }
  .float-cta.show{transform:translateY(0)}
  .float-cta:hover{transform:translateY(0)}
  .site-footer{padding-bottom:56px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .hero h1{font-size:28px}
  .section-title{font-size:23px}
  .price-value .pv{font-size:30px}
  .trust-item .tk{font-size:21px}
  .stat .num{font-size:26px}
  .btn{width:100%;padding:0 18px}
  .btn-sm{width:auto}
  .hero-actions{flex-direction:column}
  .nav-cta .btn-sm{display:none}
}

/* roulang page: article */
:root{
  --primary:#1F4E9C;
  --primary-dark:#163C7A;
  --primary-light:#3B6FC4;
  --primary-08:rgba(31,78,156,.08);
  --primary-12:rgba(31,78,156,.12);
  --accent:#FF7A2F;
  --accent-dark:#E4621A;
  --accent-light:#FFB07A;
  --teal:#12A594;
  --bg:#F4F7FC;
  --card:#FFFFFF;
  --soft:#EEF3FB;
  --line:#E3E9F2;
  --text:#0F1B2D;
  --muted:#4A5A72;
  --weak:#8A98AD;
  --dark:#101A2B;
  --dark-2:#9FB0C9;
  --r-lg:20px;
  --r-md:16px;
  --r-sm:10px;
  --r-img:14px;
  --sh-1:0 2px 10px rgba(16,27,45,.06),0 12px 32px rgba(16,27,45,.06);
  --sh-2:0 6px 18px rgba(31,78,156,.10),0 20px 44px rgba(16,27,45,.10);
  --sect:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  font-size:16px;line-height:1.8;color:var(--text);background:var(--bg);
  letter-spacing:0;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none;transition:color .2s ease,background-color .2s ease,transform .2s ease}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35;letter-spacing:-.2px}
h1{font-size:clamp(28px,4vw,44px)}
h2{font-size:clamp(22px,3vw,32px)}
h3{font-size:20px;font-weight:600}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
svg{width:20px;height:20px;stroke-width:1.8}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}

.container{max-width:1200px;margin:0 auto;padding:0 32px}

/* ---------- 顶部导航 ---------- */
.site-header{position:sticky;top:0;z-index:120;padding:16px 24px;transition:padding .2s ease}
.site-header.is-scrolled{padding-top:8px;padding-bottom:8px}
.nav-panel{
  max-width:1200px;margin:0 auto;display:flex;align-items:center;gap:20px;
  padding:12px 20px;background:rgba(255,255,255,.97);
  border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);transition:box-shadow .2s ease,padding .2s ease;
}
.site-header.is-scrolled .nav-panel{box-shadow:0 8px 22px rgba(16,27,45,.10),0 18px 40px rgba(16,27,45,.08)}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{width:18px;height:18px;border-radius:6px;background:linear-gradient(135deg,var(--primary),var(--primary-light));box-shadow:inset 0 0 0 3px rgba(255,255,255,.55)}
.brand-text{font-size:18px;font-weight:700;color:var(--text);letter-spacing:.2px}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:12px}
.nav-item{
  display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border-radius:var(--r-sm);
  font-size:14.5px;font-weight:500;color:var(--muted);transition:background-color .2s ease,color .2s ease;
}
.nav-item svg{width:20px;height:20px;color:currentColor}
.nav-item:hover{background:var(--primary-08);color:var(--primary)}
.nav-item.active{background:var(--primary-12);color:var(--primary);box-shadow:inset 3px 0 0 var(--primary)}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:14px}
.nav-actions::before{content:"";width:1px;height:26px;background:var(--line)}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
  background:var(--card);align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);transition:transform .2s ease,opacity .2s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-sm);font-size:15px;font-weight:600;
  border:1px solid transparent;transition:background-color .2s ease,transform .2s ease,box-shadow .2s ease,color .2s ease;
}
.btn-sm{padding:10px 18px;font-size:14.5px}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(255,122,47,.28)}
.btn-primary:hover{background:var(--accent-dark);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{background:#fff;color:var(--primary);border-color:var(--primary)}
.btn-outline:hover{background:var(--primary-08)}
.btn-ghost{background:#fff;color:var(--muted);border-color:var(--line)}
.btn-ghost:hover{color:var(--primary);border-color:var(--primary-light)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn.is-loading{pointer-events:none;color:transparent;position:relative}
.btn.is-loading::after{content:"";position:absolute;width:18px;height:18px;border-radius:50%;border:2px solid rgba(255,255,255,.55);border-top-color:#fff;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* 移动端抽屉 */
.nav-drawer{
  position:fixed;inset:0;z-index:200;background:rgba(16,26,43,.55);
  opacity:0;visibility:hidden;transition:opacity .2s ease,visibility .2s ease;
}
.nav-drawer.open{opacity:1;visibility:visible}
.drawer-inner{
  position:absolute;right:0;top:0;bottom:0;width:min(88vw,380px);background:#fff;
  padding:22px;display:flex;flex-direction:column;gap:20px;transform:translateX(12px);
  transition:transform .22s ease;overflow-y:auto;
}
.nav-drawer.open .drawer-inner{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-close{width:40px;height:40px;border-radius:12px;border:1px solid var(--line);font-size:20px;line-height:1;color:var(--muted)}
.drawer-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.drawer-card{
  display:flex;flex-direction:column;gap:8px;padding:16px;border-radius:var(--r-md);
  border:1px solid var(--line);background:var(--card);font-size:14.5px;font-weight:600;color:var(--text);
}
.drawer-card svg{width:20px;height:20px;color:var(--primary)}
.drawer-card:hover{background:var(--primary-08);border-color:var(--primary-light)}
.drawer-cta{margin-top:auto}

/* ---------- 文章头部与面包屑 ---------- */
.page-main{padding-bottom:96px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--weak);padding:28px 0 18px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:var(--line)}
.breadcrumb .current{color:var(--muted)}

.article-layout{
  display:grid;grid-template-columns:minmax(0,760px) 280px;gap:48px;justify-content:center;
  align-items:start;
}
.article-main{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1);padding:40px 44px 32px;position:relative;overflow:hidden}
.article-main::before{content:"";position:absolute;left:0;top:0;width:4px;height:100%;background:linear-gradient(180deg,var(--primary),rgba(31,78,156,0))}
.article-badge{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  background:var(--primary-08);color:var(--primary);font-size:13px;font-weight:600;
}
.article-title{margin:18px 0 0;font-size:clamp(26px,3.4vw,40px);line-height:1.34;letter-spacing:-.4px}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;margin-top:18px;padding-bottom:22px;border-bottom:1px solid var(--line);font-size:13px;color:var(--weak)}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--line)}

.article-body{padding-top:26px;font-size:16px;line-height:1.85;color:var(--text)}
.article-body p{margin:0 0 1.1em}
.article-body h2{
  position:relative;margin:38px 0 16px;padding-left:14px;font-size:24px;font-weight:700;
}
.article-body h2::before{content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:4px;border-radius:2px;background:var(--primary)}
.article-body h3{margin:26px 0 12px;font-size:19px;font-weight:700}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:4px}
.article-body li{position:relative;padding-left:20px;margin-bottom:8px;color:var(--muted)}
.article-body ul>li::before{content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;border-radius:2px;background:var(--primary-light)}
.article-body ol{counter-reset:li}
.article-body ol>li::before{
  counter-increment:li;content:counter(li);position:absolute;left:0;top:.35em;
  width:16px;height:16px;border-radius:50%;background:var(--primary-12);color:var(--primary);
  font-size:11px;line-height:16px;text-align:center;font-weight:700;
}
.article-body blockquote{
  margin:22px 0;padding:16px 20px;background:var(--soft);border-left:3px solid var(--primary);
  border-radius:0 var(--r-sm) var(--r-sm) 0;color:var(--muted);font-size:15.5px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-img);margin:22px 0 10px;background:var(--soft);min-height:160px;object-fit:cover;width:100%}
.article-body figure{margin:22px 0}
.article-body figcaption{margin-top:8px;text-align:center;font-size:13px;color:var(--weak)}
.article-body a{color:var(--primary);border-bottom:1px solid var(--primary-12)}
.article-body a:hover{color:var(--accent-dark);border-bottom-color:var(--accent)}
.article-body strong{font-weight:700}
.article-body table{width:100%;display:block;overflow-x:auto;border-collapse:collapse;margin:20px 0;font-size:14.5px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left;color:var(--muted)}
.article-body th{background:var(--soft);color:var(--text);font-weight:600}
.article-body hr{border:0;border-top:1px solid var(--line);margin:30px 0}

.article-foot{
  margin-top:34px;padding:20px 22px;border-radius:var(--r-md);background:var(--soft);
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
}
.article-foot .src{font-size:13.5px;color:var(--muted);line-height:1.7}
.article-foot .src strong{color:var(--text);display:block;font-size:14px;margin-bottom:4px}
.article-foot .acts{display:flex;flex-wrap:wrap;gap:10px}

.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  min-height:260px;text-align:center;padding:30px 10px;
}
.empty-state .icon{
  width:64px;height:64px;border-radius:50%;background:var(--soft);display:flex;align-items:center;justify-content:center;color:var(--primary-light);
}
.empty-state h2{font-size:20px}
.empty-state p{color:var(--muted);font-size:14.5px;max-width:420px}

/* ---------- 侧栏 ---------- */
.article-side{position:sticky;top:110px;display:flex;flex-direction:column;gap:20px}
.side-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-1);padding:22px}
.side-card h3{font-size:15px;font-weight:700;display:flex;align-items:center;gap:8px;padding-bottom:14px;border-bottom:1px solid var(--line)}
.side-card h3 svg{width:18px;height:18px;color:var(--primary)}
.toc-item{margin-top:10px;font-size:13.8px;line-height:1.7}
.toc-item a{color:var(--muted);display:block;padding-left:10px;border-left:2px solid var(--line)}
.toc-item a:hover{color:var(--primary);border-left-color:var(--primary)}
.toc-sub a{padding-left:22px;font-size:13.2px;color:var(--weak)}
.side-facts{display:flex;flex-direction:column;gap:12px;margin-top:14px;font-size:13.5px;color:var(--muted)}
.side-facts div{display:flex;justify-content:space-between;gap:12px}
.side-facts strong{color:var(--text);font-weight:600}

/* ---------- 相关推荐 ---------- */
.related{margin-top:72px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:28px}
.section-head h2{font-size:clamp(22px,2.6vw,28px)}
.section-head .link{font-size:14px;font-weight:600;color:var(--primary)}
.section-head .link:hover{color:var(--accent-dark)}
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.news-card{
  display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-md);box-shadow:var(--sh-1);overflow:hidden;
  transition:transform .2s ease,box-shadow .2s ease;
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.news-thumb{position:relative;aspect-ratio:16/10;background:var(--soft);overflow:hidden}
.news-thumb img{width:100%;height:100%;object-fit:cover}
.news-thumb .ph{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:var(--weak)}
.news-body{padding:20px;display:flex;flex-direction:column;gap:12px;flex:1}
.tag{display:inline-flex;align-items:center;padding:4px 12px;border-radius:999px;background:var(--primary-08);color:var(--primary);font-size:12.5px;font-weight:600;align-self:flex-start}
.news-body h3{font-size:16.5px;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card:hover h3{color:var(--primary)}
.news-body p{font-size:14.5px;line-height:1.75;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{margin-top:auto;display:flex;align-items:center;gap:10px;font-size:13px;color:var(--weak);padding-top:12px;border-top:1px solid var(--line)}
.news-meta .arrow{margin-left:auto;color:var(--primary);font-weight:700}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:140;display:flex;align-items:center;gap:10px;
  padding:12px 18px;border-radius:999px;background:var(--accent);color:#fff;
  box-shadow:0 10px 26px rgba(255,122,47,.30);font-size:14.5px;font-weight:600;
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity .2s ease,transform .2s ease,background-color .2s ease;
}
.float-cta.show{opacity:.94;transform:translateY(0);pointer-events:auto}
.float-cta:hover{background:var(--accent-dark);transform:translateY(-2px)}
.float-cta svg{width:18px;height:18px}
.float-cta .sub{background:rgba(255,255,255,.22);border-radius:999px;padding:4px 10px;font-size:13px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--soft);border-top:1px solid var(--line);padding:64px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.4fr .8fr .9fr 1.2fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-desc{font-size:14px;line-height:1.85;color:var(--muted);max-width:340px}
.footer-social{display:flex;gap:10px;margin-top:18px}
.footer-social a{
  width:38px;height:38px;border-radius:12px;background:#fff;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;color:var(--primary);
}
.footer-social a:hover{background:var(--primary);color:#fff;border-color:var(--primary)}
.footer-social svg{width:18px;height:18px}
.footer-col h4{font-size:14px;font-weight:600;margin-bottom:16px;color:var(--text)}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:13.5px;color:var(--muted);display:inline-block}
.footer-col a:hover{color:var(--primary);transform:translateX(2px)}
.footer-contact{display:flex;flex-direction:column;gap:12px;font-size:13.5px;color:var(--muted);line-height:1.75}
.footer-contact strong{display:block;color:var(--text);font-size:13.5px;font-weight:600;margin-bottom:2px}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--weak);
}
.fb-links{display:flex;gap:18px}
.fb-links a{color:var(--weak)}
.fb-links a:hover{color:var(--primary)}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .article-layout{grid-template-columns:minmax(0,1fr) 260px;gap:36px}
  .article-main{padding:36px 34px 28px}
}
@media (max-width:1024px){
  :root{--sect:72px}
  .container{padding:0 24px}
  .nav-links{display:none}
  .nav-toggle{display:inline-flex}
  .nav-actions::before{display:none}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:28px}
  .article-side{position:static;order:2}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:768px){
  :root{--sect:56px}
  .container{padding:0 20px}
  .site-header{padding:10px 12px}
  .nav-panel{padding:10px 14px;gap:12px;border-radius:16px}
  .nav-actions .btn{display:none}
  .article-main{padding:28px 22px 24px;border-radius:var(--r-md)}
  .article-main::before{width:3px}
  .article-body h2{font-size:21px}
  .article-body h3{font-size:18px}
  .news-grid{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .page-main{padding-bottom:96px}
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;justify-content:center;
    padding:12px 16px calc(12px + env(safe-area-inset-bottom));
    opacity:1;transform:none;pointer-events:auto;box-shadow:0 -8px 22px rgba(16,27,45,.12);
  }
  .float-cta.show{opacity:1}
}
@media (max-width:520px){
  .brand-text{font-size:16.5px}
  .article-title{font-size:24px}
  .article-meta{gap:8px 12px}
  .article-foot{flex-direction:column;align-items:flex-start}
  .article-foot .acts{width:100%}
  .article-foot .acts .btn{flex:1}
  .drawer-grid{grid-template-columns:1fr}
}

/* roulang page: category1 */
:root{
  --primary:#1F4E9C;
  --primary-dark:#163C7A;
  --primary-light:#3B6FC4;
  --primary-08:rgba(31,78,156,.08);
  --primary-12:rgba(31,78,156,.12);
  --accent:#FF7A2F;
  --accent-dark:#E4621A;
  --accent-light:#FFB07A;
  --teal:#12A594;
  --danger:#C0392B;
  --bg:#F4F7FC;
  --card:#FFFFFF;
  --soft:#EEF3FB;
  --line:#E3E9F2;
  --text:#0F1B2D;
  --text-2:#4A5A72;
  --text-3:#8A98AD;
  --white:#FFFFFF;
  --dark:#101A2B;
  --dark-2:#9FB0C9;
  --r-nav:20px;
  --r-card:16px;
  --r-sm:10px;
  --r-img:14px;
  --sh-card:0 2px 10px rgba(16,27,45,.06),0 12px 32px rgba(16,27,45,.06);
  --sh-hover:0 6px 18px rgba(31,78,156,.10),0 20px 44px rgba(16,27,45,.10);
  --sh-nav:0 4px 14px rgba(16,27,45,.08),0 18px 40px rgba(16,27,45,.10);
  --t:200ms ease;
  --maxw:1200px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
svg{display:block}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
::selection{background:var(--primary-12)}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 32px}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  padding:16px 24px;
  transition:padding var(--t);
}
.site-header.scrolled{padding:8px 24px}
.nav-shell{
  max-width:var(--maxw);
  margin:0 auto;
  display:flex;
  align-items:center;
  gap:18px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-nav);
  box-shadow:var(--sh-nav);
  padding:12px 20px;
  transition:box-shadow var(--t);
}
.site-header.scrolled .nav-shell{box-shadow:0 6px 20px rgba(16,27,45,.12),0 22px 46px rgba(16,27,45,.12)}
.nav-brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-mark{
  width:26px;height:26px;border-radius:8px;
  background:linear-gradient(135deg,var(--primary) 0%,var(--primary-light) 58%,var(--accent) 100%);
  flex:none;
}
.brand-text{font-size:18px;font-weight:700;letter-spacing:.2px;color:var(--text)}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-item{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:9px 14px;
  border-radius:12px;
  font-size:14.5px;
  color:var(--text-2);
  transition:var(--t);
}
.nav-item svg{width:20px;height:20px;stroke-width:1.7;flex:none}
.nav-item:hover{background:var(--primary-08);color:var(--primary)}
.nav-item.active{background:var(--primary-12);color:var(--primary);font-weight:600}
.nav-item.active::before{
  content:"";position:absolute;left:2px;top:22%;bottom:22%;width:3px;border-radius:3px;background:var(--primary);
}
.nav-actions{display:flex;align-items:center;gap:12px;padding-left:20px;border-left:1px solid var(--line);flex:none}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
  align-items:center;justify-content:center;color:var(--text-2);
}
.nav-toggle svg{width:22px;height:22px;stroke-width:1.8}
.nav-toggle:hover{border-color:var(--primary);color:var(--primary)}

.nav-drawer{
  max-width:var(--maxw);
  margin:10px auto 0;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-nav);
  box-shadow:var(--sh-nav);
  padding:18px;
  display:none;
}
.nav-drawer.open{display:block}
.drawer-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.drawer-link{
  display:flex;align-items:center;gap:10px;padding:14px;border-radius:12px;
  background:var(--soft);font-size:15px;color:var(--text-2);transition:var(--t);
}
.drawer-link svg{width:20px;height:20px;stroke-width:1.7;color:var(--primary)}
.drawer-link:hover{background:var(--primary-08);color:var(--primary)}
.drawer-cta{margin-top:14px}
.drawer-cta .btn{width:100%}

/* ============ 按钮 / 徽章 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;
  padding:13px 24px;border-radius:var(--r-sm);border:1px solid transparent;
  transition:var(--t);white-space:nowrap;
}
.btn svg{width:18px;height:18px;stroke-width:1.8}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(255,122,47,.26)}
.btn-primary:hover{background:var(--accent-dark);transform:translateY(-1px);box-shadow:0 10px 22px rgba(255,122,47,.32)}
.btn-primary:active{transform:translateY(1px);box-shadow:0 4px 12px rgba(255,122,47,.24)}
.btn-outline{background:#fff;border-color:var(--line);color:var(--primary)}
.btn-outline:hover{border-color:var(--primary);background:var(--primary-08);transform:translateY(-1px)}
.btn-outline:active{transform:translateY(1px)}
.btn-light{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.42);color:#fff}
.btn-light:hover{background:rgba(255,255,255,.2);transform:translateY(-1px)}
.btn-sm{padding:9px 16px;font-size:14px}
.btn[disabled]{opacity:.5;cursor:not-allowed;transform:none}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:600;padding:5px 12px;border-radius:999px;
  background:var(--primary-08);color:var(--primary);
}
.badge-accent{background:var(--accent);color:#fff}
.badge-ghost{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.28)}

/* ============ 面包屑 ============ */
.breadcrumb-wrap{padding-top:28px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3)}
.breadcrumb a{color:var(--text-3);transition:var(--t)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:#C6D0DE}
.breadcrumb .current{color:var(--text-2)}

/* ============ 分类 Hero ============ */
.cat-hero-wrap{padding-top:20px}
.cat-hero{
  position:relative;
  overflow:hidden;
  border-radius:24px;
  min-height:340px;
  padding:60px 52px;
  display:flex;
  flex-direction:column;
  justify-content:center;
  color:#fff;
  background-image:url("/assets/images/backpic/back-1.webp");
  background-size:cover;
  background-position:center;
  box-shadow:0 18px 46px rgba(16,27,45,.18);
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(102deg,rgba(16,26,43,.9) 0%,rgba(16,26,43,.74) 48%,rgba(16,26,43,.36) 100%);
}
.cat-hero::after{
  content:"";position:absolute;right:-120px;top:-80px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,122,47,.22) 0%,rgba(255,122,47,0) 68%);
}
.cat-hero-inner{position:relative;z-index:1;max-width:760px}
.cat-hero h1{
  margin-top:16px;
  font-size:clamp(28px,3.6vw,44px);
  font-weight:700;
  line-height:1.32;
  letter-spacing:-.4px;
}
.cat-hero p{
  margin-top:16px;
  font-size:17px;
  color:#D7E1F0;
  max-width:640px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-meta{display:flex;flex-wrap:wrap;gap:24px;margin-top:30px;font-size:13.5px;color:var(--dark-2)}
.hero-meta span{display:inline-flex;align-items:center;gap:7px}
.hero-meta svg{width:16px;height:16px;stroke-width:1.8;color:var(--accent-light)}

/* ============ 板块通用 ============ */
.section{margin-top:96px}
.sec-head{max-width:780px;margin-bottom:36px}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:.6px;
  color:var(--primary);margin-bottom:12px;
}
.sec-title{font-size:clamp(24px,3vw,34px);font-weight:700;letter-spacing:-.2px;line-height:1.36}
.sec-desc{margin-top:14px;color:var(--text-2);font-size:16px}

/* ============ 导语区 ============ */
.intro-grid{display:grid;grid-template-columns:1.35fr .95fr;gap:28px;align-items:start}
.intro-text p{color:var(--text-2);margin-bottom:16px}
.intro-text p:last-child{margin-bottom:0}
.intro-text strong{color:var(--text);font-weight:600}
.intro-card{
  background:var(--soft);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:26px 26px 22px;
}
.intro-card h3{font-size:17px;font-weight:600;margin-bottom:6px}
.intro-card .hint{font-size:13px;color:var(--text-3);margin-bottom:16px}
.intro-list li{
  display:flex;gap:12px;padding:12px 0;border-bottom:1px dashed #D8E2F0;font-size:14.5px;color:var(--text-2);
}
.intro-list li:last-child{border-bottom:0;padding-bottom:0}
.intro-list .dot{
  width:22px;height:22px;border-radius:50%;flex:none;margin-top:4px;
  background:#fff;border:1px solid var(--line);
  display:grid;place-items:center;font-size:12px;font-weight:700;color:var(--primary);
}

/* ============ 三列图文卡 ============ */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.guide-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-card);
  overflow:hidden;
  transition:var(--t);
  display:flex;flex-direction:column;
}
.guide-card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover)}
.guide-thumb{
  aspect-ratio:16/10;
  background:var(--soft);
  overflow:hidden;
}
.guide-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.guide-card:hover .guide-thumb img{transform:scale(1.03)}
.guide-body{padding:24px;display:flex;flex-direction:column;flex:1}
.icon-badge{
  width:44px;height:44px;border-radius:12px;background:var(--primary-08);
  display:grid;place-items:center;color:var(--primary);margin-bottom:16px;
}
.icon-badge svg{width:22px;height:22px;stroke-width:1.7}
.guide-body h3{font-size:19px;font-weight:600;margin-bottom:10px}
.guide-body p{font-size:14.5px;line-height:1.75;color:var(--text-2);flex:1}
.guide-foot{margin-top:20px;padding-top:16px;border-top:1px solid var(--line)}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--primary);transition:var(--t)}
.text-link svg{width:16px;height:16px;stroke-width:2;transition:transform var(--t)}
.text-link:hover{color:var(--primary-dark)}
.text-link:hover svg{transform:translateX(3px)}

/* ============ 分组要点 ============ */
.points-wrap{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.point-group{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-card);padding:28px;
}
.point-group-head{display:flex;align-items:center;gap:12px;margin-bottom:8px}
.point-group-head .icon-badge{margin-bottom:0;width:38px;height:38px}
.point-group-head .icon-badge svg{width:20px;height:20px}
.point-group h3{font-size:19px;font-weight:600}
.point-group .sub{font-size:13.5px;color:var(--text-3);margin-bottom:14px}
.point-list li{
  display:flex;gap:12px;padding:13px 0;border-bottom:1px solid var(--line);
  font-size:15px;color:var(--text-2);line-height:1.75;
}
.point-list li:last-child{border-bottom:0;padding-bottom:0}
.check{
  width:20px;height:20px;border-radius:6px;flex:none;margin-top:5px;
  background:rgba(18,165,148,.12);color:var(--teal);
  display:grid;place-items:center;
}
.check svg{width:13px;height:13px;stroke-width:2.6}
.point-list strong{color:var(--text);font-weight:600}

/* ============ 关联分类条 ============ */
.related-bar{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.rel-card{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-card);padding:24px;transition:var(--t);
}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);border-color:#CFDDF2}
.rel-card .rel-left{display:flex;align-items:center;gap:16px;min-width:0}
.rel-card h3{font-size:17px;font-weight:600;margin-bottom:4px}
.rel-card p{font-size:13.5px;color:var(--text-3)}
.rel-arrow{
  width:38px;height:38px;border-radius:50%;flex:none;
  background:var(--primary-08);color:var(--primary);display:grid;place-items:center;transition:var(--t);
}
.rel-arrow svg{width:18px;height:18px;stroke-width:2}
.rel-card:hover .rel-arrow{background:var(--accent);color:#fff}

/* ============ FAQ ============ */
.faq{max-width:820px;margin:0 auto}
.faq-item{
  background:var(--card);border:1px solid var(--line);border-radius:12px;
  margin-bottom:12px;overflow:hidden;transition:var(--t);
}
.faq-item.open{border-color:#CFDDF2;box-shadow:var(--sh-card)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;text-align:left;font-size:16px;font-weight:600;color:var(--text);
}
.faq-icon{
  width:28px;height:28px;border-radius:50%;flex:none;
  background:var(--primary-08);color:var(--primary);
  display:grid;place-items:center;transition:var(--t);
}
.faq-icon svg{width:15px;height:15px;stroke-width:2.4}
.faq-item.open .faq-icon{background:var(--accent);color:#fff;transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease}
.faq-a-inner{
  padding:16px 22px 20px;border-top:1px solid var(--line);
  font-size:15px;line-height:1.85;color:var(--text-2);
}

/* ============ CTA 条带 ============ */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--dark);color:#fff;border-radius:20px;
  padding:48px 52px;
  display:flex;align-items:center;justify-content:space-between;gap:36px;
  box-shadow:0 20px 50px rgba(16,27,45,.22);
}
.cta-band::after{
  content:"";position:absolute;right:-90px;bottom:-140px;width:360px;height:360px;border-radius:50%;
  background:radial-gradient(circle,rgba(31,78,156,.5) 0%,rgba(31,78,156,0) 70%);
}
.cta-band-text{position:relative;z-index:1;max-width:640px}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;line-height:1.4}
.cta-band p{margin-top:12px;color:var(--dark-2);font-size:15.5px}
.cta-band-actions{position:relative;z-index:1;display:flex;gap:14px;flex-wrap:wrap}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:70;
  display:inline-flex;align-items:center;gap:8px;
  background:var(--accent);color:#fff;font-size:15px;font-weight:600;
  padding:14px 22px;border-radius:999px;
  box-shadow:0 10px 26px rgba(255,122,47,.36);
  opacity:0;transform:translateY(10px);pointer-events:none;
  transition:opacity var(--t),transform var(--t),background var(--t);
}
.float-cta.show{opacity:1;transform:translateY(0);pointer-events:auto}
.float-cta:hover{background:var(--accent-dark);transform:translateY(-2px)}
.float-cta svg{width:17px;height:17px;stroke-width:2}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:96px;
  background:var(--soft);
  border-top:1px solid var(--line);
  padding:64px 0 28px;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.25fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-desc{font-size:14px;color:var(--text-2);line-height:1.85;max-width:340px}
.footer-social{display:flex;gap:10px;margin-top:20px}
.footer-social a{
  width:38px;height:38px;border-radius:10px;background:#fff;border:1px solid var(--line);
  display:grid;place-items:center;color:var(--text-2);transition:var(--t);
}
.footer-social a svg{width:19px;height:19px;stroke-width:1.7}
.footer-social a:hover{color:var(--primary);border-color:var(--primary);transform:translateY(-2px)}
.footer-col h4{font-size:14px;font-weight:600;margin-bottom:16px;color:var(--text)}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{
  display:inline-block;font-size:13.5px;color:var(--text-2);line-height:2;transition:var(--t);
}
.footer-col ul a:hover{color:var(--primary);transform:translateX(2px)}
.footer-contact .fc-item{font-size:13.5px;color:var(--text-2);margin-bottom:12px;line-height:1.8}
.footer-contact .fc-item strong{display:block;font-size:13px;color:var(--text);font-weight:600}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid #DDE5F0;
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
}
.footer-bottom p{font-size:13px;color:var(--text-3)}
.fb-links{display:flex;gap:20px;flex-wrap:wrap}
.fb-links a{font-size:13px;color:var(--text-3);transition:var(--t)}
.fb-links a:hover{color:var(--primary)}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .intro-grid{grid-template-columns:1.2fr 1fr}
}
@media (max-width:1024px){
  .container{padding:0 24px}
  .nav-links{display:none}
  .nav-toggle{display:flex}
  .nav-actions{border-left:0;padding-left:0}
  .nav-actions .btn{display:none}
  .section{margin-top:72px}
  .intro-grid{grid-template-columns:1fr}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .points-wrap{grid-template-columns:1fr}
  .related-bar{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:40px}
  .site-footer{margin-top:72px}
}
@media (max-width:768px){
  .site-header{padding:12px 14px}
  .container{padding:0 20px}
  .cat-hero{padding:44px 26px;min-height:300px}
  .cat-hero p{font-size:15.5px}
  .hero-meta{gap:16px}
  .grid-3{grid-template-columns:1fr}
  .section{margin-top:56px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .float-cta{
    left:16px;right:16px;bottom:16px;justify-content:center;
    border-radius:14px;padding:16px 20px;
    padding-bottom:calc(16px + env(safe-area-inset-bottom));
  }
  .cta-band{padding:32px 24px;border-radius:16px}
  .cta-band-actions{width:100%}
  .cta-band-actions .btn{flex:1}
  .point-group{padding:22px}
  .guide-body{padding:20px}
}
@media (max-width:480px){
  .brand-text{font-size:16.5px}
  .cat-hero{padding:36px 20px}
  .hero-actions .btn{width:100%}
  .sec-title{font-size:22px}
}

/* roulang page: category2 */
:root{
  --primary:#1F4E9C;
  --primary-dark:#163C7A;
  --primary-light:#3B6FC4;
  --primary-08:rgba(31,78,156,.08);
  --primary-12:rgba(31,78,156,.12);
  --accent:#FF7A2F;
  --accent-dark:#E4621A;
  --accent-light:#FFB07A;
  --teal:#12A594;
  --bg:#F4F7FC;
  --card:#FFFFFF;
  --soft:#EEF3FB;
  --line:#E3E9F2;
  --text:#0F1B2D;
  --muted:#4A5A72;
  --weak:#8A98AD;
  --dark:#101A2B;
  --dark-soft:#9FB0C9;
  --danger:#C0392B;
  --r-lg:20px;
  --r-md:16px;
  --r-sm:10px;
  --r-pill:999px;
  --sh-1:0 2px 10px rgba(16,27,45,.06),0 12px 32px rgba(16,27,45,.06);
  --sh-2:0 6px 18px rgba(31,78,156,.10),0 20px 44px rgba(16,27,45,.10);
  --sh-nav:0 8px 24px rgba(16,27,45,.10),0 24px 60px rgba(16,27,45,.07);
  --ease:200ms ease;
  --container:1200px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC","Hiragino Sans GB",Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  letter-spacing:0;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color var(--ease),background-color var(--ease),transform var(--ease),box-shadow var(--ease);}
button,input,select,textarea{font:inherit;color:inherit;}
button{background:none;border:0;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p,figure,dl,dd,dt{margin:0;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  padding:18px 0 10px;
  background:linear-gradient(180deg,rgba(244,247,252,.97) 60%,rgba(244,247,252,.72));
  backdrop-filter:blur(10px);
  transition:padding var(--ease);
}
.site-header.is-scrolled{padding:8px 0 6px;}
.nav-panel{
  width:calc(100% - 48px);
  max-width:var(--container);
  margin:0 auto;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-nav);
  display:flex;
  align-items:center;
  gap:18px;
  padding:12px 20px;
  transition:padding var(--ease),box-shadow var(--ease);
}
.site-header.is-scrolled .nav-panel{padding:8px 20px;box-shadow:var(--sh-2);}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:26px;height:26px;border-radius:9px;
  background:linear-gradient(135deg,var(--primary) 0%,var(--primary-light) 58%,var(--accent) 100%);
  box-shadow:0 4px 12px rgba(31,78,156,.28);
}
.brand-text{font-size:19px;font-weight:700;letter-spacing:.2px;color:var(--text);white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:12px;padding-left:18px;border-left:1px solid var(--line);}
.nav-item{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 14px;border-radius:12px;
  font-size:14.5px;font-weight:600;color:var(--muted);
  position:relative;white-space:nowrap;
}
.nav-item svg{width:20px;height:20px;stroke-width:1.8;flex:0 0 auto;}
.nav-item:hover{background:var(--primary-08);color:var(--primary);}
.nav-item.active{background:var(--primary-12);color:var(--primary);}
.nav-item.active::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:20px;border-radius:3px;background:var(--primary);
}
.nav-side{margin-left:auto;display:flex;align-items:center;gap:12px;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);align-items:center;justify-content:center;color:var(--muted);
}
.nav-toggle svg{width:22px;height:22px;stroke-width:1.8;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:0 22px;height:46px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;white-space:nowrap;border:1px solid transparent;
  transition:background-color var(--ease),color var(--ease),transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.btn:active{transform:translateY(1px);}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 8px 20px rgba(255,122,47,.24);}
.btn-accent:hover{background:var(--accent-dark);transform:translateY(-1px);box-shadow:0 12px 26px rgba(255,122,47,.30);}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 20px rgba(31,78,156,.22);}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px);}
.btn-outline{background:transparent;color:var(--primary);border-color:rgba(31,78,156,.34);}
.btn-outline:hover{background:var(--primary-08);border-color:var(--primary);transform:translateY(-1px);}
.btn-ghost{background:var(--soft);color:var(--primary);}
.btn-ghost:hover{background:var(--primary-08);}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none;}

/* ============ 通用 ============ */
main{display:block;}
.section{padding:96px 0;}
.section.tight{padding:72px 0;}
.section.soft{background:var(--soft);}
.section.dark{background:var(--dark);color:#fff;}
.section-head{max-width:760px;margin-bottom:32px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--primary);
  background:var(--primary-08);border-radius:var(--r-pill);
  padding:5px 14px;margin-bottom:14px;
}
.section.dark .eyebrow{background:rgba(255,122,47,.16);color:var(--accent-light);}
h1{font-size:clamp(30px,4.4vw,52px);font-weight:700;line-height:1.22;letter-spacing:-.5px;}
h2{font-size:clamp(24px,3vw,34px);font-weight:700;line-height:1.3;letter-spacing:-.3px;}
h3{font-size:20px;font-weight:600;line-height:1.45;}
.lead{font-size:17px;line-height:1.85;color:var(--muted);}
.section.dark .lead,.section.dark p{color:var(--dark-soft);}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-size:14.5px;font-weight:600;}
.text-link svg{width:16px;height:16px;stroke-width:2;transition:transform var(--ease);}
.text-link:hover{color:var(--primary-dark);}
.text-link:hover svg{transform:translateX(3px);}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:600;background:var(--primary-08);color:var(--primary);
}
.badge.accent{background:var(--accent);color:#fff;}
.badge.teal{background:rgba(18,165,148,.12);color:var(--teal);}
.tag{
  display:inline-block;padding:4px 11px;border-radius:var(--r-pill);
  font-size:12.5px;color:var(--muted);background:var(--soft);border:1px solid var(--line);
}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;}

/* ============ 面包屑 ============ */
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--weak);padding-top:26px;}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--primary);}
.crumb span.sep{color:#C7D2E2;}
.crumb .current{color:var(--text);font-weight:600;}

/* ============ 分类 Hero ============ */
.cat-hero{position:relative;padding:48px 0 0;overflow:hidden;}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(31,78,156,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(31,78,156,.045) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.75),transparent 78%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.75),transparent 78%);
  pointer-events:none;
}
.cat-hero::after{
  content:"";position:absolute;right:-140px;top:-80px;width:520px;height:520px;transform:rotate(18deg);
  background:linear-gradient(180deg,rgba(59,111,196,.10),rgba(255,122,47,.05));
  border-radius:60px;pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:48px;align-items:center;padding:34px 0 22px;}
.hero-copy h1{margin:16px 0 18px;}
.hero-copy h1 .kw{color:var(--primary);}
.hero-sub{font-size:17.5px;color:var(--muted);line-height:1.85;max-width:620px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-media{position:relative;}
.hero-shot{
  position:relative;border-radius:var(--r-lg);overflow:hidden;min-height:300px;
  aspect-ratio:4/3;background:var(--soft) url("/assets/images/backpic/back-2.png") center/cover no-repeat;
  box-shadow:var(--sh-1);border:1px solid var(--line);
}
.hero-shot::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(16,27,45,.06),rgba(16,27,45,.28));}
.hero-chip{
  position:absolute;left:-22px;bottom:26px;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-sm);
  box-shadow:var(--sh-2);padding:14px 18px;min-width:210px;
}
.hero-chip strong{display:block;font-size:13px;color:var(--weak);font-weight:600;}
.hero-chip span{display:block;font-size:20px;font-weight:700;color:var(--primary);margin-top:2px;}
.hero-chip em{font-style:normal;font-size:12.5px;color:var(--teal);font-weight:600;}

/* 信任条 */
.trust-bar{
  position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:18px;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);padding:22px 26px;margin:36px 0 0;
}
.trust-item{display:flex;align-items:center;gap:12px;}
.trust-icon{
  width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:var(--primary-08);color:var(--primary);flex:0 0 auto;
}
.trust-icon svg{width:22px;height:22px;stroke-width:1.8;}
.trust-item strong{display:block;font-size:18px;font-weight:700;line-height:1.35;}
.trust-item span{display:block;font-size:13px;color:var(--weak);}

/* ============ 导语 + 数据 ============ */
.intro-grid{display:grid;grid-template-columns:minmax(0,6fr) minmax(0,5fr);gap:48px;align-items:start;}
.intro-points{display:grid;gap:14px;margin-top:26px;}
.intro-points li{display:flex;gap:12px;align-items:flex-start;font-size:15.5px;color:var(--muted);}
.intro-points li svg{width:20px;height:20px;flex:0 0 auto;margin-top:5px;color:var(--teal);stroke-width:2;}
.metric-stack{display:grid;gap:16px;}
.metric-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);padding:22px 24px;display:flex;align-items:center;gap:18px;
  transition:transform var(--ease),box-shadow var(--ease);
}
.metric-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.metric-num{font-size:32px;font-weight:700;color:var(--primary);line-height:1;min-width:92px;}
.metric-card p{font-size:14px;color:var(--muted);}
.metric-card strong{display:block;font-size:15px;color:var(--text);}

/* ============ 交错长条列表 ============ */
.zig-list{display:grid;gap:26px;margin-top:8px;}
.zig-row{
  display:grid;grid-template-columns:minmax(0,400px) minmax(0,1fr);gap:32px;align-items:center;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);padding:24px;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.zig-row:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(31,78,156,.20);}
.zig-media{border-radius:var(--r-md);overflow:hidden;background:var(--soft);aspect-ratio:16/10;min-height:200px;}
.zig-media img{width:100%;height:100%;object-fit:cover;}
.zig-row:nth-child(even) .zig-media{order:2;}
.zig-body{display:grid;gap:12px;}
.zig-top{display:flex;align-items:center;gap:14px;}
.zig-num{
  font-size:14px;font-weight:700;color:var(--primary);
  background:var(--primary-08);border-radius:var(--r-pill);padding:4px 12px;letter-spacing:.5px;
}
.zig-body p{font-size:14.8px;color:var(--muted);line-height:1.8;}

/* ============ 横向对比 ============ */
.compare-shell{position:relative;}
.compare-scroll{overflow-x:auto;padding-bottom:8px;-webkit-overflow-scrolling:touch;}
.compare-grid{display:grid;grid-template-columns:repeat(3,minmax(260px,1fr));gap:24px;min-width:820px;}
.compare-col{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);padding:26px 24px;display:flex;flex-direction:column;gap:16px;
}
.compare-col.highlight{border:1px solid var(--primary);border-top:3px solid var(--accent);}
.compare-head{display:grid;gap:10px;}
.compare-head h3{font-size:19px;}
.compare-head p{font-size:14px;color:var(--muted);}
.compare-list{display:grid;gap:12px;border-top:1px solid var(--line);padding-top:16px;}
.compare-list > div{display:grid;gap:3px;}
.compare-list dt{font-size:12.5px;font-weight:600;color:var(--weak);}
.compare-list dd{font-size:14.5px;color:var(--text);}
.scroll-hint{display:none;font-size:12.5px;color:var(--weak);margin-top:10px;}

/* ============ 风险信号（深色） ============ */
.risk-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:12px;}
.risk-card{
  background:rgba(255,255,255,.04);border:1px solid rgba(159,176,201,.22);
  border-radius:var(--r-md);padding:22px 24px;display:grid;gap:10px;
  transition:border-color var(--ease),background-color var(--ease);
}
.risk-card:hover{border-color:rgba(255,122,47,.55);background:rgba(255,122,47,.06);}
.risk-card h3{font-size:17px;color:#fff;}
.risk-card p{font-size:14.5px;color:var(--dark-soft);}
.risk-no{font-size:13px;font-weight:700;color:var(--accent-light);}

/* ============ FAQ ============ */
.faq-list{max-width:820px;margin:0 auto;display:grid;gap:12px;}
.faq-item{
  background:var(--card);border:1px solid var(--line);border-radius:12px;
  box-shadow:var(--sh-1);overflow:hidden;transition:border-color var(--ease);
}
.faq-item.open{border-color:rgba(31,78,156,.28);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 22px;text-align:left;font-size:16.5px;font-weight:600;color:var(--text);
}
.faq-q:hover{color:var(--primary);}
.faq-plus{
  width:30px;height:30px;border-radius:50%;flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;
  background:var(--primary-08);color:var(--primary);
  transition:transform var(--ease),background-color var(--ease),color var(--ease);
}
.faq-plus svg{width:16px;height:16px;stroke-width:2.2;}
.faq-item.open .faq-plus{transform:rotate(45deg);background:var(--accent);color:#fff;}
.faq-a{max-height:0;overflow:hidden;transition:max-height var(--ease);}
.faq-item.open .faq-a{max-height:340px;}
.faq-a-inner{padding:0 22px 22px;border-top:1px solid var(--line);margin-top:0;padding-top:16px;}
.faq-a-inner p{font-size:15px;color:var(--muted);line-height:1.8;}

/* ============ CTA / 表单 ============ */
.cta-wrap{display:grid;grid-template-columns:minmax(0,6fr) minmax(0,5fr);gap:24px;align-items:stretch;}
.cta-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);padding:30px;display:flex;flex-direction:column;gap:18px;
}
.cta-card.soft{background:var(--soft);}
.form-grid{display:grid;gap:14px;}
.field{display:grid;gap:6px;}
.field label{font-size:13.5px;font-weight:600;color:var(--muted);}
.field input,.field select,.field textarea{
  width:100%;height:48px;padding:0 14px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:#fff;color:var(--text);
  transition:border-color var(--ease),box-shadow var(--ease);
}
.field textarea{height:104px;padding:12px 14px;resize:vertical;line-height:1.7;}
.field input::placeholder,.field textarea::placeholder{color:var(--weak);}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-12);outline:none;
}
.form-note{font-size:13px;color:var(--weak);}
.form-msg{font-size:13.5px;font-weight:600;color:var(--teal);min-height:20px;}
.contact-list{display:grid;gap:14px;}
.contact-item{display:flex;gap:12px;align-items:flex-start;}
.contact-item svg{width:20px;height:20px;color:var(--primary);flex:0 0 auto;margin-top:5px;stroke-width:1.8;}
.contact-item strong{display:block;font-size:14.5px;}
.contact-item span{font-size:13.5px;color:var(--muted);}

/* ============ 关联分类条 ============ */
.related-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);padding:24px 28px;
}
.related-links{display:flex;flex-wrap:wrap;gap:12px;}
.rel-card{
  display:flex;align-items:center;gap:12px;padding:12px 18px;border-radius:var(--r-sm);
  background:var(--soft);border:1px solid var(--line);font-size:14.5px;font-weight:600;color:var(--text);
}
.rel-card:hover{background:var(--primary-08);border-color:rgba(31,78,156,.28);color:var(--primary);transform:translateY(-2px);}
.rel-card svg{width:18px;height:18px;color:var(--primary);stroke-width:1.9;}

/* ============ 页脚 ============ */
.site-footer{background:var(--dark);color:var(--dark-soft);padding:72px 0 26px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-mark{width:24px;height:24px;border-radius:8px;}
.footer-brand .brand-text{font-size:18px;font-weight:700;color:#fff;}
.footer-desc{font-size:13.5px;line-height:1.9;color:var(--dark-soft);max-width:320px;}
.footer-social{display:flex;gap:10px;margin-top:18px;}
.footer-social a{
  width:38px;height:38px;border-radius:11px;display:flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.06);color:var(--dark-soft);border:1px solid rgba(159,176,201,.18);
}
.footer-social a:hover{background:var(--accent);color:#fff;transform:translateY(-2px);}
.footer-social svg{width:18px;height:18px;stroke-width:1.8;}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:14px;}
.footer-col ul{display:grid;gap:9px;}
.footer-col a{font-size:13.5px;color:var(--dark-soft);display:inline-block;}
.footer-col a:hover{color:var(--accent-light);transform:translateX(2px);}
.footer-contact{display:grid;gap:12px;font-size:13.5px;}
.fc-item{line-height:1.75;}
.fc-item strong{display:block;color:#fff;font-size:13px;font-weight:600;}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(159,176,201,.18);
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
  font-size:13px;color:#8496B0;
}
.fb-links{display:flex;flex-wrap:wrap;gap:18px;}
.fb-links a{color:#9FB0C9;}
.fb-links a:hover{color:var(--accent-light);}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:70;
  display:inline-flex;align-items:center;gap:8px;
  height:52px;padding:0 22px;border-radius:var(--r-pill);
  background:var(--accent);color:#fff;font-size:15px;font-weight:600;
  box-shadow:0 12px 30px rgba(255,122,47,.34);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity var(--ease),transform var(--ease),visibility var(--ease),background-color var(--ease);
}
.float-cta.show{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta:hover{background:var(--accent-dark);transform:translateY(-2px);}
.float-cta svg{width:18px;height:18px;stroke-width:2;}

/* ============ 入场动画 ============ */
.fade-up{opacity:0;transform:translateY(12px);animation:fadeUp .6s ease forwards;}
.fade-up.d1{animation-delay:.08s;}
.fade-up.d2{animation-delay:.16s;}
@keyframes fadeUp{to{opacity:1;transform:translateY(0);}}
@media (prefers-reduced-motion:reduce){
  .fade-up{opacity:1;transform:none;animation:none;}
  html{scroll-behavior:auto;}
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .container{padding:0 28px;}
  .nav-panel{width:calc(100% - 40px);}
}
@media (max-width:1024px){
  .section{padding:72px 0;}
  .nav-links{margin-left:6px;padding-left:12px;gap:2px;}
  .nav-item{padding:9px 10px;font-size:14px;}
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .hero-copy h1{margin-top:12px;}
  .hero-chip{left:14px;bottom:14px;}
  .intro-grid{grid-template-columns:1fr;gap:32px;}
  .zig-row{grid-template-columns:minmax(0,300px) minmax(0,1fr);gap:24px;}
  .cta-wrap{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media (max-width:900px){
  .nav-toggle{display:flex;}
  .nav-links{
    position:absolute;left:20px;right:20px;top:calc(100% + 10px);
    display:none;flex-direction:column;align-items:stretch;gap:8px;
    background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
    box-shadow:var(--sh-nav);padding:14px;margin:0;border-left:1px solid var(--line);
  }
  .nav-panel{position:relative;}
  .site-header.nav-open .nav-links{display:flex;}
  .nav-item{padding:12px 14px;font-size:15px;}
  .nav-item.active::before{height:24px;}
  .nav-cta{display:none;}
  .nav-side{gap:8px;}
}
@media (max-width:768px){
  body{font-size:15.5px;}
  .container{padding:0 20px;}
  .nav-panel{width:calc(100% - 24px);padding:10px 14px;}
  .brand-text{font-size:17px;}
  .section{padding:56px 0;}
  .section.tight{padding:48px 0;}
  .trust-bar{grid-template-columns:1fr;gap:14px;padding:18px;}
  .zig-row{grid-template-columns:1fr;gap:18px;padding:18px;}
  .zig-row:nth-child(even) .zig-media{order:0;}
  .risk-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .float-cta{
    right:0;left:0;bottom:0;height:auto;padding:10px 20px 16px;border-radius:0;
    justify-content:center;gap:12px;box-shadow:0 -8px 24px rgba(16,27,45,.16);
  }
  .float-cta .fc-alt{
    display:inline-flex;align-items:center;justify-content:center;
    height:44px;padding:0 18px;border-radius:var(--r-sm);
    background:rgba(255,255,255,.18);color:#fff;font-size:14.5px;font-weight:600;
  }
  .float-cta .fc-main{display:inline-flex;align-items:center;justify-content:center;height:44px;}
  .site-footer{padding-bottom:96px;}
  .scroll-hint{display:block;}
  .compare-grid{min-width:760px;}
}
@media (max-width:520px){
  .hero-actions .btn{width:100%;}
  .hero-shot{aspect-ratio:4/3;min-height:220px;}
  .metric-card{flex-direction:column;align-items:flex-start;gap:8px;}
  .metric-num{font-size:28px;}
  .related-bar{flex-direction:column;align-items:flex-start;}
  .related-links{width:100%;}
  .rel-card{width:100%;}
  .faq-q{font-size:15.5px;padding:16px;}
}