/* roulang page: index */
/* ===================== 设计变量 ===================== */
:root{
  --primary:#0F4E7E;
  --primary-dark:#0A3455;
  --primary-light:#E8F1F8;
  --accent:#E8842A;
  --accent-light:#FDF3E7;
  --text:#122A3E;
  --text-2:#4A6577;
  --text-3:#8AA0B0;
  --bg:#F7F9FB;
  --card:#FFFFFF;
  --border:#E4EBF1;
  --success:#2E9E6B;
  --danger:#D9534F;
  --ph:#E9EEF4;
  --sh-1:0 1px 2px rgba(18,42,62,.06);
  --sh-2:0 8px 24px rgba(18,42,62,.08);
  --sh-3:0 12px 32px rgba(18,42,62,.12);
  --r-card:16px;
  --r-sm:12px;
  --r-btn:10px;
  --r-pill:999px;
  --wrap:1200px;
}
@media (min-width:1440px){ :root{ --wrap:1280px; } }

/* ===================== 基础 reset ===================== */
*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:0;
  color:var(--text);
  background:var(--bg);
  font-variant-numeric:tabular-nums;
}
h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote{ margin:0; padding:0; }
ul,ol{ list-style:none; }
img{ display:block; max-width:100%; background:var(--ph); }
a{ color:inherit; text-decoration:none; transition:color .18s ease; }
button,input,select,textarea{ font-family:inherit; font-size:inherit; }
button{ cursor:pointer; }
:focus-visible{ outline:2px solid var(--primary); outline-offset:2px; border-radius:6px; }

/* ===================== 容器与排版 ===================== */
.container{ width:100%; max-width:var(--wrap); margin:0 auto; padding-left:20px; padding-right:20px; }
@media (max-width:599px){ .container{ padding-left:16px; padding-right:16px; } }

h1{ font-size:38px; line-height:1.28; font-weight:700; letter-spacing:0; }
h2{ font-size:25px; line-height:1.35; font-weight:600; letter-spacing:0; }
h3{ font-size:19px; line-height:1.45; font-weight:600; letter-spacing:0; }
p{ font-size:16px; line-height:1.8; color:var(--text-2); }
@media (max-width:1023px){ h1{ font-size:32px; } h2{ font-size:23px; } }
@media (max-width:599px){ h1{ font-size:27px; } h2{ font-size:21px; } h3{ font-size:17px; } p{ font-size:15.5px; } }

.section{ padding:72px 0; }
@media (max-width:1023px){ .section{ padding:56px 0; } }
@media (max-width:599px){ .section{ padding:40px 0; } }

.section-head{ display:flex; align-items:flex-end; justify-content:space-between; gap:24px; margin-bottom:36px; flex-wrap:wrap; }
.section-head h2{ color:var(--text); }
.section-head .head-sub{ margin-top:8px; font-size:15px; color:var(--text-2); }
.sec-label{
  display:inline-flex; align-items:center; gap:6px;
  font-size:13px; font-weight:600; color:var(--primary);
  background:var(--primary-light); border-radius:var(--r-pill);
  padding:4px 12px; margin-bottom:12px;
}
@media (max-width:599px){ .section-head{ margin-bottom:24px; } }

/* ===================== 按钮 ===================== */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  height:44px; padding:0 20px;
  border-radius:var(--r-btn); border:1px solid transparent;
  font-size:15px; font-weight:600; line-height:1; white-space:nowrap;
  transition:transform .18s ease, background .18s ease, box-shadow .18s ease, color .18s ease, border-color .18s ease;
}
.btn:active{ transform:translateY(1px); }
.btn-primary{ background:var(--primary); color:#fff; box-shadow:var(--sh-2); }
.btn-primary:hover{ background:var(--primary-dark); color:#fff; transform:translateY(-1px); box-shadow:var(--sh-3); }
.btn-ghost{ background:#fff; color:var(--primary); border-color:var(--primary); }
.btn-ghost:hover{ background:var(--primary-light); color:var(--primary-dark); transform:translateY(-1px); }
.btn-accent{ background:var(--accent); color:#fff; box-shadow:0 8px 20px rgba(232,132,42,.28); }
.btn-accent:hover{ background:#cf7120; color:#fff; transform:translateY(-1px); }
.btn-sm{ height:36px; padding:0 16px; font-size:14px; border-radius:8px; }
.btn-lg{ height:50px; padding:0 26px; font-size:16px; }
.btn[disabled],.btn.is-disabled{ opacity:.4; pointer-events:none; }

.link-more{ font-size:14px; font-weight:600; color:var(--primary); display:inline-flex; align-items:center; gap:6px; }
.link-more:hover{ color:var(--accent); }

/* ===================== 徽章 / 标签 ===================== */
.badge{
  display:inline-flex; align-items:center;
  background:var(--primary-light); color:var(--primary);
  font-size:13px; font-weight:600; line-height:1;
  padding:5px 10px; border-radius:var(--r-pill);
}
.badge-accent{ background:var(--accent-light); color:#B96A1B; }

/* ===================== 顶部公告条 ===================== */
.announce{ background:var(--primary-light); border-bottom:1px solid var(--border); }
.announce-inner{ display:flex; align-items:center; justify-content:space-between; gap:12px; min-height:38px; }
.announce-text{ font-size:13px; color:var(--primary-dark); font-weight:500; }
.announce-close{
  border:0; background:transparent; color:var(--primary); font-size:18px; line-height:1;
  width:26px; height:26px; border-radius:50%; display:flex; align-items:center; justify-content:center;
}
.announce-close:hover{ background:rgba(15,78,126,.1); }
.announce.is-hidden{ display:none; }

/* ===================== 导航 ===================== */
.nav-bar{
  position:sticky; top:0; z-index:70;
  background:#fff; border-bottom:1px solid var(--border); box-shadow:var(--sh-1);
}
.nav-inner{ display:flex; align-items:center; gap:24px; min-height:72px; }

.brand{ display:flex; align-items:center; gap:10px; flex:0 0 auto; }
.brand-mark{
  width:28px; height:28px; border-radius:9px; background:var(--primary);
  display:flex; align-items:center; justify-content:center; flex:0 0 auto;
}
.brand-mark svg{ width:16px; height:16px; }
.brand-name{ font-size:20px; font-weight:600; color:var(--primary-dark); letter-spacing:0; }
@media (max-width:599px){ .brand-name{ font-size:17px; } .brand-mark{ width:26px; height:26px; } }

.nav-search{
  display:flex; align-items:center; gap:8px;
  flex:1 1 300px; max-width:460px; height:44px;
  background:#fff; border:1px solid var(--border); border-radius:12px;
  padding:0 4px 0 12px; transition:border-color .18s ease, box-shadow .18s ease;
}
@media (min-width:1280px){ .nav-search{ max-width:480px; } }
.nav-search:focus-within{ border-color:var(--primary); box-shadow:0 0 0 2px rgba(15,78,126,.16), var(--sh-2); }
.nav-search .search-icon{ display:flex; color:var(--primary); flex:0 0 auto; }
.nav-search input{
  flex:1 1 auto; min-width:0; height:100%;
  border:0; outline:0; background:transparent; font-size:15px; color:var(--text);
}
.nav-search input::placeholder{ color:var(--text-3); }
.nav-search .search-btn{
  flex:0 0 auto; height:36px; padding:0 16px; border:0; border-radius:8px;
  background:var(--primary); color:#fff; font-size:14px; font-weight:600;
  transition:background .18s ease;
}
.nav-search .search-btn:hover{ background:var(--primary-dark); }

.nav-links{ display:flex; align-items:center; gap:2px; margin-left:auto; }
.nav-link{
  position:relative; display:inline-flex; align-items:center; height:44px;
  padding:0 12px; font-size:14px; color:var(--text-2); border-radius:8px;
  transition:background .18s ease, color .18s ease;
}
.nav-link:hover{ background:var(--primary-light); color:var(--primary); }
.nav-link.is-active{ color:var(--primary); font-weight:600; }
.nav-link.is-active::after{
  content:""; position:absolute; left:12px; right:12px; bottom:4px;
  height:2px; border-radius:2px; background:var(--primary);
}
.nav-cta{ margin-left:8px; }

.nav-toggle{
  display:none; width:44px; height:44px; border:1px solid var(--border); border-radius:10px;
  background:#fff; color:var(--primary); align-items:center; justify-content:center; flex:0 0 auto;
}
.nav-toggle:hover{ background:var(--primary-light); }

@media (max-width:1100px){
  .nav-links{ display:none; }
  .nav-cta{ display:none; }
  .nav-toggle{ display:flex; margin-left:auto; }
  .nav-inner{ gap:12px; }
}
@media (max-width:767px){
  .nav-search{ display:none; }
  .nav-inner{ min-height:60px; }
}

/* 移动端展开面板 */
.mobile-panel{
  display:none; background:#fff; border-bottom:1px solid var(--border);
  box-shadow:var(--sh-2); padding:16px 0 20px;
}
.mobile-panel.is-open{ display:block; }
.mobile-search{ display:flex; gap:8px; margin-bottom:16px; }
.mobile-search input{
  flex:1 1 auto; min-width:0; height:44px; padding:0 14px;
  border:1px solid var(--border); border-radius:12px; background:#fff; color:var(--text); outline:0;
}
.mobile-search input:focus{ border-color:var(--primary); box-shadow:0 0 0 2px rgba(15,78,126,.16); }
.mobile-nav li{ border-bottom:1px solid var(--border); }
.mobile-nav a{
  display:flex; align-items:center; justify-content:space-between;
  height:48px; font-size:15px; color:var(--text-2);
}
.mobile-nav a.is-active{ color:var(--primary); font-weight:600; }
.mobile-nav a::after{ content:"›"; font-size:20px; color:var(--text-3); line-height:1; }
.mobile-cta{ width:100%; margin-top:18px; }

/* ===================== Hero ===================== */
.hero{ position:relative; background:var(--primary-light); overflow:hidden; }
.hero::before{
  content:""; position:absolute; inset:0; pointer-events:none;
  background-image:linear-gradient(to right, rgba(15,78,126,.06) 1px, transparent 1px),
                   linear-gradient(to bottom, rgba(15,78,126,.06) 1px, transparent 1px);
  background-size:48px 48px;
}
.hero::after{
  content:""; position:absolute; right:-160px; top:-120px; width:540px; height:540px;
  background:rgba(15,78,126,.07);
  clip-path:polygon(38% 0, 100% 0, 100% 62%, 0 100%);
  pointer-events:none;
}
.hero-inner{
  position:relative; z-index:2;
  display:grid; grid-template-columns:1.05fr .95fr; gap:48px; align-items:center;
  padding-top:72px; padding-bottom:72px;
}
.hero-eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  background:#fff; color:var(--primary); font-size:13px; font-weight:600;
  border-radius:var(--r-pill); padding:6px 14px; box-shadow:var(--sh-1); margin-bottom:18px;
}
.hero-eyebrow .dot{ width:7px; height:7px; border-radius:50%; background:var(--success); }
.hero h1{ color:var(--text); margin-bottom:16px; }
.hero-sub{ font-size:17px; line-height:1.75; color:var(--text-2); max-width:30em; margin-bottom:28px; }
.hero-actions{ display:flex; flex-wrap:wrap; gap:14px; margin-bottom:28px; }
.hero-tags{ display:flex; flex-wrap:wrap; gap:20px; }
.hero-tags li{ display:flex; align-items:center; gap:8px; font-size:14px; color:var(--text-2); font-weight:500; }
.hero-tags svg{ color:var(--primary); flex:0 0 auto; }

.hero-media{ position:relative; }
.hero-media img{
  width:100%; aspect-ratio:16/10; object-fit:cover;
  border-radius:var(--r-card); box-shadow:var(--sh-3); background:var(--ph);
}
.hero-float{
  position:absolute; right:-14px; bottom:-20px;
  display:flex; align-items:center; gap:14px;
  background:#fff; border:1px solid var(--border); border-radius:var(--r-sm);
  box-shadow:var(--sh-3); padding:14px 20px;
}
.hero-float-num{ font-size:28px; font-weight:700; color:var(--primary-dark); line-height:1; }
.hero-float-label{ font-size:13px; color:var(--text-2); line-height:1.5; max-width:9em; }

@media (max-width:1023px){
  .hero-inner{ grid-template-columns:1fr; gap:36px; padding-top:56px; padding-bottom:56px; }
  .hero-media{ order:2; }
  .hero-float{ right:12px; bottom:-18px; }
}
@media (max-width:599px){
  .hero-inner{ padding-top:40px; padding-bottom:48px; gap:32px; }
  .hero-actions .btn{ width:100%; max-width:320px; }
  .hero-sub{ font-size:15.5px; }
  .hero-float{ padding:12px 16px; }
  .hero-float-num{ font-size:22px; }
}

/* ===================== 能力条 ===================== */
.capabilities{ background:#fff; border-bottom:1px solid var(--border); }
.cap-list{ display:grid; grid-template-columns:repeat(4,1fr); }
.cap-item{ display:flex; align-items:flex-start; gap:12px; padding:28px 24px; border-right:1px solid var(--border); }
.cap-item:last-child{ border-right:0; }
.cap-icon{
  width:38px; height:38px; border-radius:11px; flex:0 0 auto;
  background:var(--accent-light); color:var(--accent);
  display:flex; align-items:center; justify-content:center;
}
.cap-item strong{ display:block; font-size:15px; font-weight:600; color:var(--text); margin-bottom:2px; }
.cap-item span.cap-desc{ font-size:13px; color:var(--text-2); line-height:1.6; display:block; }
@media (max-width:1023px){
  .cap-list{ grid-template-columns:repeat(2,1fr); }
  .cap-item:nth-child(2n){ border-right:0; }
  .cap-item:nth-child(-n+2){ border-bottom:1px solid var(--border); }
}
@media (max-width:599px){
  .cap-list{ grid-template-columns:1fr; }
  .cap-item{ border-right:0; border-bottom:1px solid var(--border); padding:20px 4px; }
  .cap-item:last-child{ border-bottom:0; }
  .cap-item:nth-child(-n+2){ border-bottom:1px solid var(--border); }
}

/* ===================== 三步上手 ===================== */
.steps-track{ position:relative; display:grid; grid-template-columns:repeat(3,1fr); gap:28px; }
.steps-track::before{
  content:""; position:absolute; top:44px; left:14%; right:14%;
  border-top:2px dashed rgba(15,78,126,.22); z-index:0;
}
.step-card{
  position:relative; z-index:1; background:#fff; border:1px solid var(--border);
  border-radius:var(--r-card); padding:34px 24px 26px; box-shadow:var(--sh-1);
  transition:transform .2s ease, box-shadow .2s ease;
}
.step-card:hover{ transform:translateY(-2px); box-shadow:var(--sh-2); }
.step-num{
  position:absolute; top:-22px; left:24px;
  width:52px; height:52px; border-radius:50%;
  background:var(--primary); color:var(--accent);
  display:flex; align-items:center; justify-content:center;
  font-size:18px; font-weight:700; letter-spacing:.5px;
  box-shadow:0 8px 18px rgba(15,78,126,.26);
}
.step-card h3{ margin:16px 0 10px; color:var(--text); }
.step-card p{ font-size:15px; color:var(--text-2); }
.step-tip{
  display:inline-flex; align-items:center; gap:6px; margin-top:16px;
  font-size:13px; color:var(--primary); background:var(--primary-light);
  padding:5px 10px; border-radius:var(--r-pill);
}
@media (max-width:767px){
  .steps-track{ grid-template-columns:1fr; gap:32px; }
  .steps-track::before{ top:0; bottom:20px; left:25px; right:auto; border-top:0; border-left:2px dashed rgba(15,78,126,.22); }
  .step-card{ padding:30px 20px 22px; }
}

/* ===================== 最新信息（内容列表） ===================== */
.news{ background:#fff; border-top:1px solid var(--border); border-bottom:1px solid var(--border); }
.post-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
@media (max-width:1023px){ .post-grid{ grid-template-columns:repeat(2,1fr); gap:20px; } }
@media (max-width:599px){ .post-grid{ grid-template-columns:1fr; } }

.post-card{
  display:flex; flex-direction:column; overflow:hidden;
  background:var(--card); border:1px solid var(--border); border-radius:var(--r-card);
  box-shadow:var(--sh-1); transition:transform .2s ease, box-shadow .2s ease;
}
.post-card:hover{ transform:translateY(-2px); box-shadow:var(--sh-2); }
.post-thumb{ display:block; background:var(--ph); }
.post-thumb img{ width:100%; aspect-ratio:16/9; object-fit:cover; }
.post-body{ padding:20px; display:flex; flex-direction:column; gap:10px; flex:1 1 auto; }
.post-title{ font-size:17px; line-height:1.5; font-weight:600; color:var(--text); }
.post-title a{ display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
.post-card:hover .post-title a{ color:var(--primary); }
.post-excerpt{
  font-size:14px; line-height:1.7; color:var(--text-2);
  display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden;
}
.post-meta{ display:flex; align-items:center; gap:10px; font-size:13px; color:var(--text-3); margin-top:auto; padding-top:4px; }
.post-meta .sep{ width:1px; height:12px; background:var(--border); display:inline-block; }

.empty-state{
  grid-column:1 / -1; display:flex; flex-direction:column; align-items:center; gap:14px;
  padding:56px 20px; background:#fff; border:1px dashed var(--border); border-radius:var(--r-card);
  text-align:center;
}
.empty-state svg{ color:var(--text-3); }
.empty-state p{ font-size:15px; color:var(--text-2); }

/* ===================== 案例证明 ===================== */
.case-lead{
  display:grid; grid-template-columns:1fr 1fr; gap:0;
  background:#fff; border:1px solid var(--border); border-radius:var(--r-card);
  overflow:hidden; box-shadow:var(--sh-1); margin-bottom:24px;
}
.case-lead-media{ position:relative; min-height:320px; }
.case-lead-media img{ width:100%; height:100%; object-fit:cover; position:absolute; inset:0; }
.case-lead-body{ padding:40px 36px; display:flex; flex-direction:column; justify-content:center; gap:16px; }
.case-quote{
  font-size:20px; line-height:1.6; font-weight:600; color:var(--text);
  border-left:4px solid var(--accent); padding-left:16px;
}
.case-desc{ font-size:15px; color:var(--text-2); }
.case-tags{ display:flex; flex-wrap:wrap; gap:8px; }

.case-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:24px; }
.case-card{
  background:#fff; border:1px solid var(--border); border-radius:var(--r-card);
  overflow:hidden; box-shadow:var(--sh-1); transition:transform .2s ease, box-shadow .2s ease;
  display:flex; flex-direction:column;
}
.case-card:hover{ transform:translateY(-2px); box-shadow:var(--sh-2); }
.case-card img{ width:100%; aspect-ratio:4/3; object-fit:cover; }
.case-card-body{ padding:22px; display:flex; flex-direction:column; gap:12px; flex:1 1 auto; }
.case-card-body h3{ font-size:17px; color:var(--text); }
.case-card-body p{ font-size:14px; line-height:1.75; }

@media (max-width:1023px){
  .case-lead{ grid-template-columns:1fr; }
  .case-lead-media{ min-height:240px; aspect-ratio:16/9; position:relative; }
  .case-lead-body{ padding:28px 24px; }
}
@media (max-width:767px){
  .case-grid{ grid-template-columns:1fr; }
  .case-quote{ font-size:17px; }
}

/* ===================== 常见异议 FAQ ===================== */
.faq-wrap{ max-width:880px; margin:0 auto; }
.faq-list{ border:1px solid var(--border); border-radius:var(--r-card); overflow:hidden; background:#fff; box-shadow:var(--sh-1); }
.accordion{ margin:0; background:transparent; border:0; }
.accordion .accordion-item{ border-bottom:1px solid var(--border); }
.accordion .accordion-item:last-child{ border-bottom:0; }
.accordion .accordion-title{
  display:flex; align-items:center; justify-content:space-between; gap:16px;
  padding:20px 22px; font-size:16px; font-weight:600; color:var(--text);
  background:#fff; border:0; line-height:1.6;
  transition:background .2s ease, color .2s ease;
}
.accordion .accordion-title::before{
  content:"+"; order:2; flex:0 0 auto;
  width:26px; height:26px; border-radius:50%; background:var(--primary-light); color:var(--primary);
  display:flex; align-items:center; justify-content:center; font-size:17px; font-weight:600; line-height:1;
}
.accordion .accordion-title:hover{ background:var(--primary-light); color:var(--primary); }
.accordion .accordion-item.is-active > .accordion-title{ background:var(--primary-light); color:var(--primary); }
.accordion .accordion-item.is-active > .accordion-title::before{ content:"−"; background:var(--primary); color:#fff; }
.accordion .accordion-content{
  padding:4px 22px 22px; border:0; background:var(--primary-light);
  color:var(--text-2); font-size:15px; line-height:1.85;
}
.accordion .accordion-content p{ font-size:15px; color:var(--text-2); }
.accordion .accordion-content::before{ display:none; }
.faq-aux{ display:flex; align-items:center; justify-content:center; gap:12px; margin-top:24px; flex-wrap:wrap; }
.faq-aux span{ font-size:14px; color:var(--text-2); }

/* ===================== 立即开通 CTA ===================== */
.cta-band{ position:relative; background:var(--primary-light); overflow:hidden; }
.cta-band::before{
  content:""; position:absolute; inset:0; pointer-events:none;
  background-image:radial-gradient(rgba(15,78,126,.12) 1px, transparent 1px);
  background-size:18px 18px;
}
.cta-band::after{
  content:""; position:absolute; left:-120px; bottom:-160px; width:420px; height:420px;
  background:rgba(15,78,126,.08); border-radius:50%;
}
.cta-inner{
  position:relative; z-index:2;
  display:flex; align-items:center; justify-content:space-between; gap:32px;
  min-height:160px; padding-top:32px; padding-bottom:32px; flex-wrap:wrap;
}
.cta-inner h2{ color:var(--text); margin-bottom:8px; }
.cta-inner p{ font-size:15px; color:var(--text-2); }
.cta-actions{ display:flex; gap:14px; flex-wrap:wrap; }
@media (max-width:767px){
  .cta-inner{ padding-top:36px; padding-bottom:36px; }
  .cta-actions{ width:100%; }
  .cta-actions .btn{ flex:1 1 auto; min-width:150px; }
}

/* ===================== 页脚 ===================== */
.site-footer{ background:#fff; border-top:1px solid var(--border); padding-top:56px; }
.footer-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1.2fr; gap:40px; }
.footer-col h4{ font-size:15px; font-weight:600; color:var(--text); margin-bottom:16px; }
.footer-col ul li{ margin-bottom:10px; }
.footer-col ul a{ font-size:14px; color:var(--text-2); }
.footer-col ul a:hover{ color:var(--primary); text-decoration:underline; text-underline-offset:3px; }
.footer-about{ display:flex; flex-direction:column; gap:14px; }
.footer-about .brand{ gap:10px; }
.footer-about p{ font-size:14px; line-height:1.75; color:var(--text-2); max-width:26em; }
.footer-keywords{ font-size:13px; color:var(--text-3); line-height:1.7; }
.footer-contact li{ font-size:14px; color:var(--text-2); display:flex; align-items:center; gap:8px; }
.footer-contact li strong{ color:var(--text); font-weight:600; }
.footer-cta{ margin-top:18px; width:100%; }
.footer-bottom{ margin-top:48px; border-top:1px solid var(--border); padding:20px 0; }
.footer-bottom-inner{ display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap; }
.footer-bottom-inner span{ font-size:13px; color:var(--text-3); }
@media (max-width:1023px){
  .footer-grid{ grid-template-columns:repeat(2,1fr); gap:32px; }
}
@media (max-width:599px){
  .site-footer{ padding-top:40px; }
  .footer-grid{ grid-template-columns:1fr; gap:28px; }
  .footer-bottom{ margin-top:32px; }
}

/* ===================== 返回顶部 ===================== */
.to-top{
  position:fixed; right:24px; bottom:24px; z-index:80;
  width:46px; height:46px; border-radius:50%; border:0;
  background:var(--primary); color:#fff; box-shadow:var(--sh-3);
  display:flex; align-items:center; justify-content:center;
  opacity:0; visibility:hidden; transform:translateY(10px);
  transition:opacity .25s ease, transform .25s ease, visibility .25s ease, background .2s ease;
}
.to-top.is-visible{ opacity:1; visibility:visible; transform:translateY(0); }
.to-top:hover{ background:var(--primary-dark); }
@media (max-width:599px){ .to-top{ right:16px; bottom:16px; width:42px; height:42px; } }

/* ===================== 无障碍与打印细节 ===================== */
.sr-only{
  position:absolute; width:1px; height:1px; padding:0; margin:-1px;
  overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0;
}

/* roulang page: article */
:root{
  --primary:#0F4E7E;
  --primary-dark:#0A3455;
  --primary-light:#E8F1F8;
  --accent:#E8842A;
  --accent-light:#FDF3E7;
  --text:#122A3E;
  --text-2:#4A6577;
  --text-3:#8AA0B0;
  --bg:#F7F9FB;
  --card:#FFFFFF;
  --line:#E4EBF1;
  --success:#2E9E6B;
  --danger:#D9534F;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(18,42,62,.06);
  --sh-2:0 8px 24px rgba(18,42,62,.08);
  --sh-3:0 12px 32px rgba(18,42,62,.12);
  --font:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  letter-spacing:0;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--primary);text-decoration:none;transition:color .18s ease,border-color .18s ease,background-color .18s ease;}
a:hover{color:var(--primary-dark);}
button{font-family:inherit;}
input,button,select,textarea{font-family:inherit;font-size:100%;}
h1,h2,h3,h4{margin:0;font-weight:600;letter-spacing:0;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}
.num{font-variant-numeric:tabular-nums;}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
}
@media (min-width:1440px){
  .container{max-width:1280px;}
}
@media (max-width:599px){
  .container{padding:0 16px;}
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 20px;
  border-radius:var(--r-sm);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1;
  cursor:pointer;
  white-space:nowrap;
  transition:transform .16s ease,box-shadow .16s ease,background-color .16s ease,color .16s ease,border-color .16s ease;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--sh-1);}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-primary:active{transform:translateY(1px);box-shadow:none;}
.btn-ghost{background:#fff;color:var(--primary);border-color:#C9DCEA;}
.btn-ghost:hover{background:var(--primary-light);color:var(--primary-dark);border-color:var(--primary);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-accent{background:var(--accent);color:#fff;}
.btn-accent:hover{background:#CF6F1B;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-sm{height:36px;padding:0 14px;font-size:14px;border-radius:8px;}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none;}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border-radius:var(--r-pill);
  background:var(--primary-light);
  color:var(--primary);
  font-size:13px;
  font-weight:600;
  line-height:1.4;
}
.badge-accent{background:var(--accent-light);color:#B65F12;}
.tag-pill{
  display:inline-flex;
  align-items:center;
  padding:6px 14px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:#fff;
  color:var(--text-2);
  font-size:13px;
  transition:all .16s ease;
}
.tag-pill:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-light);}

/* ============ 导航 ============ */
.nav-bar{
  position:sticky;
  top:0;
  z-index:80;
  background:#fff;
  border-bottom:1px solid var(--line);
  box-shadow:var(--sh-1);
}
.nav-inner{
  display:flex;
  align-items:center;
  gap:20px;
  height:72px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand-mark{
  width:28px;
  height:28px;
  border-radius:8px;
  background:var(--primary);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
}
.brand-mark svg{width:16px;height:16px;}
.brand-name{
  font-size:20px;
  font-weight:600;
  color:var(--primary-dark);
  letter-spacing:0;
}
.nav-search{
  display:flex;
  align-items:center;
  flex:1 1 auto;
  max-width:460px;
  height:44px;
  position:relative;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  overflow:hidden;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.nav-search:focus-within{
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(15,78,126,.12),var(--sh-2);
}
.search-icon{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding-left:14px;
  color:var(--primary);
  flex-shrink:0;
}
.nav-search input[type="search"]{
  flex:1 1 auto;
  min-width:0;
  height:100%;
  border:0;
  outline:none;
  background:transparent;
  padding:0 12px;
  font-size:14px;
  color:var(--text);
}
.nav-search input[type="search"]::placeholder{color:var(--text-3);}
.nav-search input[type="search"]::-webkit-search-cancel-button{-webkit-appearance:none;}
.search-btn{
  height:100%;
  padding:0 18px;
  border:0;
  background:var(--primary);
  color:#fff;
  font-size:14px;
  font-weight:600;
  cursor:pointer;
  transition:background-color .16s ease;
}
.search-btn:hover{background:var(--primary-dark);}
.nav-links{
  display:flex;
  align-items:center;
  gap:2px;
  margin-left:auto;
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:40px;
  padding:0 12px;
  border-radius:8px;
  font-size:14px;
  color:var(--text-2);
}
.nav-link:hover{background:var(--primary-light);color:var(--primary);}
.nav-link.is-active{color:var(--primary);font-weight:600;}
.nav-link.is-active::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:0;
  height:2px;
  border-radius:2px;
  background:var(--primary);
}
.nav-cta{margin-left:10px;}
.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:44px;
  height:44px;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  background:#fff;
  color:var(--primary-dark);
  cursor:pointer;
}
.nav-toggle:hover{background:var(--primary-light);}
@media (min-width:1280px){
  .nav-search{max-width:480px;}
}
@media (max-width:1023px){
  .nav-links{gap:0;}
  .nav-link{padding:0 9px;font-size:13px;}
}
@media (max-width:900px){
  .nav-inner{height:60px;gap:12px;}
  .nav-toggle{display:inline-flex;}
  .nav-search{
    display:none;
    max-width:none;
  }
  .nav-bar.is-open .nav-search{
    display:flex;
    position:fixed;
    top:60px;
    left:16px;
    right:16px;
    z-index:70;
    box-shadow:var(--sh-3);
  }
  .nav-links{
    position:fixed;
    top:60px;
    left:0;
    right:0;
    bottom:0;
    z-index:60;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    margin:0;
    padding:80px 16px 96px;
    background:#fff;
    overflow-y:auto;
    transform:translateX(-102%);
    transition:transform .24s ease;
    box-shadow:var(--sh-3);
  }
  .nav-bar.is-open .nav-links{transform:translateX(0);}
  .nav-link{
    height:48px;
    padding:0 6px;
    justify-content:space-between;
    border-bottom:1px solid var(--line);
    border-radius:0;
    font-size:15px;
  }
  .nav-link::after{
    content:"";
    width:7px;
    height:7px;
    border-right:1.6px solid var(--text-3);
    border-bottom:1.6px solid var(--text-3);
    transform:rotate(-45deg);
    flex-shrink:0;
  }
  .nav-link.is-active::after{
    border-color:var(--primary);
  }
  .nav-link.is-active::before{
    content:"";
    position:absolute;
    left:0;
    top:12px;
    bottom:12px;
    width:3px;
    border-radius:3px;
    background:var(--primary);
  }
  .nav-cta{
    display:none;
    margin:0;
  }
  .nav-bar.is-open .nav-cta{
    display:inline-flex;
    position:fixed;
    left:16px;
    right:16px;
    bottom:20px;
    z-index:70;
    height:48px;
    background:var(--primary);
    color:#fff;
  }
  .nav-bar.is-open .nav-cta:hover{background:var(--primary-dark);color:#fff;}
}

/* ============ 文章头部 ============ */
.article-hero{
  position:relative;
  background:var(--primary-light);
  border-bottom:1px solid var(--line);
  padding:32px 0 40px;
  overflow:hidden;
}
.article-hero::before{
  content:"";
  position:absolute;
  top:-120px;
  right:-80px;
  width:340px;
  height:340px;
  border-radius:50%;
  background:rgba(255,255,255,.55);
  pointer-events:none;
}
.article-hero .container{position:relative;z-index:1;}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-3);
  margin-bottom:18px;
}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--primary);text-decoration:underline;text-underline-offset:3px;}
.breadcrumb .sep{color:#B7C7D3;}
.breadcrumb .current{
  color:var(--text);
  max-width:420px;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.article-head{max-width:880px;}
.article-head h1{
  margin:14px 0 16px;
  font-size:32px;
  line-height:1.35;
  font-weight:700;
  color:var(--primary-dark);
  word-break:break-word;
}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--text-3);
}
.article-meta .meta-sep{color:#C4D2DC;}
@media (min-width:1280px){
  .article-head h1{font-size:34px;}
}
@media (max-width:767px){
  .article-hero{padding:24px 0 28px;}
  .article-head h1{font-size:25px;margin:10px 0 14px;}
  .breadcrumb .current{max-width:220px;}
}

/* ============ 主体布局 ============ */
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 320px;
  gap:40px;
  align-items:start;
  padding:48px 0 72px;
}
@media (max-width:1023px){
  .article-layout{
    grid-template-columns:minmax(0,1fr);
    gap:32px;
    padding:36px 0 56px;
  }
}

/* 正文 */
.article-body{
  max-width:760px;
  background:transparent;
  font-size:17px;
  line-height:1.9;
  color:var(--text);
  word-break:break-word;
}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 1.2em;}
.article-body h2{
  position:relative;
  margin:40px 0 16px;
  padding-left:14px;
  font-size:23px;
  line-height:1.45;
  font-weight:600;
  color:var(--primary-dark);
}
.article-body h2::before{
  content:"";
  position:absolute;
  left:0;
  top:6px;
  bottom:6px;
  width:4px;
  border-radius:2px;
  background:var(--primary);
}
.article-body h3{
  margin:28px 0 12px;
  font-size:19px;
  line-height:1.5;
  color:var(--text);
}
.article-body h4{
  margin:22px 0 10px;
  font-size:17px;
  color:var(--text);
}
.article-body ul,
.article-body ol{
  margin:0 0 1.2em;
  padding-left:1.4em;
}
.article-body ul{list-style:disc;}
.article-body ol{list-style:decimal;}
.article-body li{margin-bottom:8px;line-height:1.85;}
.article-body li::marker{color:var(--primary);}
.article-body blockquote{
  margin:24px 0;
  padding:20px 22px;
  border-left:3px solid var(--primary);
  border-radius:0 var(--r-md) var(--r-md) 0;
  background:var(--primary-light);
  color:var(--text-2);
  font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{
  width:100%;
  max-width:100%;
  height:auto;
  margin:24px auto;
  border-radius:var(--r-md);
  background:#E9EEF4;
}
.article-body figure{margin:24px 0;}
.article-body figcaption{
  margin-top:10px;
  font-size:12px;
  color:var(--text-3);
  text-align:center;
}
.article-body table{
  width:100%;
  margin:24px 0;
  border-collapse:collapse;
  border:1px solid var(--line);
  font-size:15px;
  border-radius:var(--r-md);
  overflow:hidden;
}
.article-body th,
.article-body td{
  padding:10px 14px;
  border:1px solid var(--line);
  text-align:left;
}
.article-body th{
  background:var(--primary-light);
  color:var(--primary-dark);
  font-weight:600;
}
.article-body tbody tr:nth-child(even){background:#FAFCFE;}
.article-body a{
  color:var(--primary);
  text-decoration:underline;
  text-decoration-thickness:1px;
  text-underline-offset:3px;
}
.article-body a:hover{color:var(--primary-dark);}
.article-body strong{color:var(--primary-dark);}
.article-body hr{
  margin:32px 0;
  border:0;
  border-top:1px solid var(--line);
}
@media (max-width:599px){
  .article-body{font-size:17px;line-height:1.85;}
  .article-body h2{font-size:20px;margin-top:32px;}
  .article-body h3{font-size:18px;}
}

/* 空态 */
.empty-state{
  padding:56px 24px;
  border:1px dashed #C9DCEA;
  border-radius:var(--r-lg);
  background:#fff;
  text-align:center;
}
.empty-state .empty-icon{
  width:52px;
  height:52px;
  margin:0 auto 16px;
  border-radius:50%;
  background:var(--primary-light);
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--primary);
}
.empty-state h2{
  font-size:20px;
  color:var(--primary-dark);
  margin-bottom:10px;
}
.empty-state p{
  font-size:15px;
  color:var(--text-2);
  margin-bottom:20px;
}
.empty-state .empty-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;}

/* 侧栏 */
.article-side{
  position:relative;
}
.side-sticky{
  position:sticky;
  top:88px;
  display:flex;
  flex-direction:column;
  gap:20px;
}
.side-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  padding:20px;
}
.side-card h3{
  font-size:16px;
  font-weight:600;
  color:var(--primary-dark);
  margin-bottom:14px;
  display:flex;
  align-items:center;
  gap:8px;
}
.side-card h3::before{
  content:"";
  width:3px;
  height:14px;
  border-radius:2px;
  background:var(--accent);
}
.toc-list{display:flex;flex-direction:column;gap:2px;}
.toc-list a{
  display:block;
  padding:8px 10px;
  border-left:3px solid transparent;
  border-radius:0 8px 8px 0;
  font-size:14px;
  line-height:1.5;
  color:var(--text-2);
}
.toc-list a:hover{background:var(--primary-light);color:var(--primary);}
.toc-list a.is-current{
  border-left-color:var(--primary);
  background:var(--primary-light);
  color:var(--primary);
  font-weight:600;
}
.toc-list a.is-sub{padding-left:24px;font-size:13px;}
.side-links{display:flex;flex-direction:column;gap:4px;}
.side-links a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:8px;
  padding:9px 10px;
  border-radius:8px;
  font-size:14px;
  color:var(--text-2);
}
.side-links a:hover{background:var(--primary-light);color:var(--primary);}
.side-links a::after{
  content:"";
  width:6px;
  height:6px;
  border-right:1.6px solid currentColor;
  border-bottom:1.6px solid currentColor;
  transform:rotate(-45deg);
  opacity:.55;
  flex-shrink:0;
}
.side-cta{
  background:var(--primary-light);
  border:1px solid #CFE1EF;
}
.side-cta h3::before{background:var(--primary);}
.side-cta p{
  font-size:14px;
  color:var(--text-2);
  line-height:1.7;
  margin-bottom:16px;
}

/* 文章底部 */
.article-foot{padding-top:36px;}
.tag-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  padding:24px 0;
  border-top:1px solid var(--line);
}
.tag-row .tag-label{
  font-size:13px;
  color:var(--text-3);
  margin-right:2px;
}
.post-nav{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:16px;
  margin-top:24px;
}
.post-nav-card{
  display:block;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:18px 20px;
  box-shadow:var(--sh-1);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.post-nav-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--sh-2);
  border-color:#CFE1EF;
  color:inherit;
}
.post-nav-card .pn-label{
  display:block;
  font-size:12px;
  color:var(--accent);
  font-weight:600;
  margin-bottom:8px;
}
.post-nav-card .pn-title{
  display:block;
  font-size:15px;
  font-weight:600;
  color:var(--text);
  line-height:1.55;
  margin-bottom:6px;
}
.post-nav-card:hover .pn-title{color:var(--primary);}
.post-nav-card .pn-cat{font-size:13px;color:var(--text-3);}
@media (max-width:767px){
  .post-nav{grid-template-columns:minmax(0,1fr);}
}

/* 相关推荐 */
.rel-section{padding:48px 0 0;}
.rel-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  margin-bottom:22px;
}
.rel-head h2{
  font-size:22px;
  color:var(--primary-dark);
}
.rel-head .rel-more{
  font-size:14px;
  color:var(--text-2);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.rel-head .rel-more:hover{color:var(--primary);}
.rel-head .rel-more::after{
  content:"";
  width:6px;
  height:6px;
  border-right:1.6px solid currentColor;
  border-bottom:1.6px solid currentColor;
  transform:rotate(-45deg);
}
.rel-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.card{
  display:flex;
  flex-direction:column;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  overflow:hidden;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.card:hover{
  transform:translateY(-2px);
  box-shadow:var(--sh-2);
  border-color:#CFE1EF;
}
.card-cover{
  position:relative;
  aspect-ratio:16 / 9;
  background:#E9EEF4;
  overflow:hidden;
}
.card-cover img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .3s ease;
}
.card:hover .card-cover img{transform:scale(1.03);}
.card-body{
  padding:20px;
  display:flex;
  flex-direction:column;
  gap:10px;
  flex:1 1 auto;
}
.card-body h3{
  font-size:16px;
  font-weight:600;
  line-height:1.55;
  color:var(--text);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.card:hover .card-body h3{color:var(--primary);}
.card-body p{
  font-size:14px;
  color:var(--text-2);
  line-height:1.75;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.card-meta{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--text-3);
  margin-top:auto;
}
.card-link{position:absolute;inset:0;z-index:2;}
.card{position:relative;}
@media (max-width:1023px){
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:599px){
  .rel-grid{grid-template-columns:minmax(0,1fr);gap:16px;}
}

/* 返回入口 */
.back-row{
  display:flex;
  justify-content:center;
  padding:40px 0 8px;
}

/* CTA 带 */
.cta-band{
  margin-top:56px;
  position:relative;
  border-radius:var(--r-lg);
  background-color:var(--primary-light);
  background-image:linear-gradient(90deg,rgba(232,241,248,.94),rgba(232,241,248,.72)),url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  border:1px solid #CFE1EF;
  padding:32px 32px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  overflow:hidden;
}
.cta-band::after{
  content:"";
  position:absolute;
  right:-60px;
  bottom:-80px;
  width:220px;
  height:220px;
  border-radius:50%;
  background:rgba(255,255,255,.5);
  pointer-events:none;
}
.cta-band-text{position:relative;z-index:1;}
.cta-band-text h2{
  font-size:24px;
  color:var(--primary-dark);
  margin-bottom:8px;
}
.cta-band-text p{
  font-size:15px;
  color:var(--text-2);
}
.cta-band-actions{
  position:relative;
  z-index:1;
  display:flex;
  gap:12px;
  flex-wrap:wrap;
}
@media (max-width:767px){
  .cta-band{flex-direction:column;align-items:flex-start;padding:26px 20px;margin-top:40px;}
  .cta-band-text h2{font-size:20px;}
  .cta-band-actions{width:100%;}
  .cta-band-actions .btn{flex:1 1 140px;}
}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:72px;
  background:#fff;
  border-top:1px solid var(--line);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.3fr 1fr 1fr 1.1fr;
  gap:40px;
  padding-top:48px;
  padding-bottom:40px;
}
.footer-col h4{
  font-size:15px;
  font-weight:600;
  color:var(--primary-dark);
  margin-bottom:16px;
}
.footer-col ul{
  display:flex;
  flex-direction:column;
  gap:10px;
}
.footer-col li{
  font-size:14px;
  color:var(--text-2);
  line-height:1.7;
}
.footer-col a{
  color:var(--text-2);
  font-size:14px;
}
.footer-col a:hover{
  color:var(--primary);
  text-decoration:underline;
  text-underline-offset:3px;
}
.footer-about .brand{margin-bottom:14px;}
.footer-about p{
  font-size:14px;
  color:var(--text-2);
  line-height:1.75;
  margin-bottom:10px;
  max-width:320px;
}
.footer-keywords{
  font-size:13px !important;
  color:var(--text-3) !important;
}
.footer-contact li{font-size:14px;color:var(--text-2);}
.footer-contact strong{
  display:inline-block;
  min-width:64px;
  color:var(--text);
  font-weight:600;
}
.footer-cta{margin-top:16px;}
.footer-bottom{
  border-top:1px solid var(--line);
  background:#FBFDFE;
}
.footer-bottom-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px;
  padding-top:16px;
  padding-bottom:16px;
  font-size:12px;
  color:var(--text-3);
}
@media (max-width:1023px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
}
@media (max-width:599px){
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px;padding-top:40px;}
  .site-footer{margin-top:48px;}
}

/* 返回顶部 */
.to-top{
  position:fixed;
  right:20px;
  bottom:24px;
  width:44px;
  height:44px;
  border-radius:50%;
  border:1px solid var(--line);
  background:#fff;
  color:var(--primary);
  display:flex;
  align-items:center;
  justify-content:center;
  box-shadow:var(--sh-2);
  cursor:pointer;
  opacity:0;
  transform:translateY(10px);
  pointer-events:none;
  transition:opacity .2s ease,transform .2s ease,background-color .2s ease;
  z-index:70;
}
.to-top.is-visible{opacity:1;transform:translateY(0);pointer-events:auto;}
.to-top:hover{background:var(--primary-light);}
@media (max-width:599px){
  .to-top{right:14px;bottom:16px;}
}

/* roulang page: category1 */
:root{
  --c-primary:#0F4E7E;
  --c-primary-dark:#0A3455;
  --c-primary-light:#E8F1F8;
  --c-accent:#E8842A;
  --c-accent-light:#FDF3E7;
  --t-1:#122A3E;
  --t-2:#4A6577;
  --t-3:#8AA0B0;
  --bg:#F7F9FB;
  --card:#FFFFFF;
  --line:#E4EBF1;
  --ok:#2E9E6B;
  --warn:#D9534F;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --sh-1:0 1px 2px rgba(18,42,62,.06);
  --sh-2:0 8px 24px rgba(18,42,62,.08);
  --sh-3:0 12px 32px rgba(18,42,62,.12);
  --nav-h:72px;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--t-1);
  background:var(--bg);
  overflow-x:hidden;
  letter-spacing:0;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease;}
a:hover{color:var(--c-primary-dark);}
button,input{font-family:inherit;font-size:inherit;letter-spacing:0;}
button{cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;color:var(--t-1);font-weight:600;letter-spacing:0;}
p{margin:0;}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:1440px){.container{max-width:1280px;}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:all .2s ease;white-space:nowrap;
}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:var(--sh-1);}
.btn-primary:hover{background:var(--c-primary-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-primary:active{transform:translateY(1px);box-shadow:var(--sh-1);}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:var(--c-primary);}
.btn-ghost:hover{background:var(--c-primary-light);color:var(--c-primary-dark);transform:translateY(-1px);box-shadow:var(--sh-1);}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{height:36px;padding:0 14px;font-size:14px;}
.btn-block{width:100%;}
.btn[disabled]{opacity:.4;pointer-events:none;}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:999px;
  background:var(--c-primary-light);color:var(--c-primary);font-size:13px;font-weight:600;
}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  background:var(--c-primary-light);color:var(--c-primary);font-size:13px;
}
.pill{
  display:inline-flex;align-items:center;height:30px;padding:0 12px;border-radius:999px;
  background:#fff;border:1px solid var(--line);color:var(--t-2);font-size:13px;
}
.pill:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-light);}

/* ---------- 导航 ---------- */
.nav-bar{
  position:sticky;top:0;z-index:100;background:#fff;
  border-bottom:1px solid var(--line);box-shadow:var(--sh-1);
}
.nav-inner{display:flex;align-items:center;gap:16px;min-height:var(--nav-h);}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:28px;height:28px;border-radius:9px;background:var(--c-primary);
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;
}
.brand-mark svg{width:16px;height:16px;display:block;}
.brand-name{font-size:20px;font-weight:600;color:var(--c-primary-dark);line-height:1.2;}
.nav-search{
  position:relative;display:flex;align-items:center;flex:1 1 auto;max-width:420px;height:44px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding-left:42px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.nav-search:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 2px rgba(15,78,126,.14);}
.search-icon{
  position:absolute;left:14px;top:50%;transform:translateY(-50%);
  color:var(--c-primary);display:inline-flex;align-items:center;
}
.nav-search input{
  flex:1 1 auto;height:100%;border:0;outline:none;background:transparent;
  padding:0 8px;font-size:14px;color:var(--t-1);min-width:0;
}
.nav-search input::placeholder{color:var(--t-3);}
.search-btn{
  height:34px;margin-right:5px;padding:0 16px;border:0;border-radius:8px;
  background:var(--c-primary);color:#fff;font-size:14px;font-weight:600;
  transition:background-color .2s ease;flex:0 0 auto;
}
.search-btn:hover{background:var(--c-primary-dark);}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:40px;padding:0 12px;
  font-size:14px;color:var(--t-2);border-radius:8px;white-space:nowrap;
}
.nav-link:hover{color:var(--c-primary);background:var(--c-primary-light);}
.nav-link.is-active{color:var(--c-primary);font-weight:600;}
.nav-link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;
  background:var(--c-primary);border-radius:2px;
}
.nav-cta{margin-left:8px;flex:0 0 auto;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:#fff;color:var(--c-primary);
  align-items:center;justify-content:center;
}
.nav-toggle:hover{background:var(--c-primary-light);}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13px;color:var(--t-3);padding:20px 0 0;
}
.breadcrumb a{color:var(--t-2);}
.breadcrumb a:hover{color:var(--c-primary);}
.breadcrumb .sep{color:var(--t-3);}
.breadcrumb .current{color:var(--t-1);font-weight:600;}

/* ---------- 页头 ---------- */
.page-hero{
  background-color:var(--c-primary-light);
  background-image:linear-gradient(rgba(232,241,248,.92),rgba(247,249,251,.95)),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  padding-bottom:56px;
}
.page-hero-grid{padding-top:24px;}
.page-hero h1{
  font-size:36px;line-height:1.28;font-weight:700;color:var(--c-primary-dark);
  margin:16px 0 12px;
}
.lead{font-size:17px;line-height:1.75;color:var(--t-2);margin-bottom:20px;max-width:36em;}
.hero-points{margin-bottom:8px;}
.hero-points li{
  position:relative;padding-left:22px;font-size:15px;color:var(--t-2);margin-bottom:8px;
}
.hero-points li::before{
  content:"";position:absolute;left:0;top:12px;width:8px;height:8px;border-radius:50%;
  background:var(--c-accent);
}
.local-search{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-2);padding:24px;
}
.local-search label{display:block;font-size:14px;font-weight:600;color:var(--t-2);margin-bottom:10px;}
.local-search-form{
  display:flex;align-items:center;gap:10px;height:48px;padding:0 6px 0 14px;
  border:1px solid var(--line);border-radius:var(--r-md);background:#fff;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.local-search-form:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 2px rgba(15,78,126,.14);}
.local-search-form .search-icon{position:static;transform:none;}
.local-search-form input{
  flex:1 1 auto;height:100%;border:0;outline:none;background:transparent;
  font-size:15px;color:var(--t-1);min-width:0;
}
.local-search-form input::placeholder{color:var(--t-3);}
.local-search-form .btn{height:36px;padding:0 16px;font-size:14px;border-radius:8px;}
.quick-tags{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:14px;font-size:13px;color:var(--t-3);}

/* ---------- 数据条 ---------- */
.stat-section{padding:32px 0 0;}
.stat-strip{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);overflow:hidden;
}
.stat-item{padding:24px 22px;border-right:1px solid var(--line);}
.stat-item:last-child{border-right:0;}
.stat-num{
  display:block;font-size:28px;font-weight:700;line-height:1.2;
  color:var(--c-primary-dark);font-variant-numeric:tabular-nums;
}
.stat-num small{font-size:14px;font-weight:600;color:var(--c-primary);margin-left:4px;}
.stat-label{display:block;margin-top:6px;font-size:13px;color:var(--t-2);}

/* ---------- 主体导览 ---------- */
.guide-section{padding:64px 0 8px;}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:28px;
}
.section-head h2{font-size:26px;line-height:1.35;margin-bottom:6px;}
.section-head p{font-size:15px;color:var(--t-2);}
.text-link{font-size:14px;font-weight:600;color:var(--c-primary);white-space:nowrap;}
.text-link:hover{color:var(--c-primary-dark);text-decoration:underline;}

.toc{
  position:sticky;top:96px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-lg);box-shadow:var(--sh-1);padding:20px;
}
.toc-head{font-size:14px;font-weight:600;color:var(--t-2);margin-bottom:12px;}
.toc-list li+li{margin-top:2px;}
.toc-item{
  display:flex;align-items:flex-start;gap:10px;padding:8px 10px;border-radius:var(--r-sm);
  border-left:3px solid transparent;font-size:14px;color:var(--t-2);line-height:1.6;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.toc-item:hover{background:var(--c-primary-light);color:var(--c-primary-dark);}
.toc-item.is-current{
  background:var(--c-primary-light);border-left-color:var(--c-primary);
  color:var(--c-primary-dark);font-weight:600;
}
.toc-num{
  font-size:13px;font-weight:700;color:var(--c-accent);
  font-variant-numeric:tabular-nums;flex:0 0 auto;line-height:1.7;
}
.toc .btn-block{margin-top:16px;}

.step-grid>.cell{margin-bottom:24px;}
.step-card{
  display:flex;flex-direction:column;height:100%;background:#fff;
  border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1);
  overflow:hidden;transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
  scroll-margin-top:100px;
}
.step-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D6E3EE;}
.step-cover{position:relative;aspect-ratio:16/9;background:#E9EEF4;}
.step-cover img{width:100%;height:100%;object-fit:cover;}
.step-num{
  position:absolute;left:14px;top:14px;display:inline-flex;align-items:center;justify-content:center;
  min-width:42px;height:28px;padding:0 10px;border-radius:999px;
  background:rgba(255,255,255,.94);color:var(--c-primary-dark);
  font-size:13px;font-weight:700;font-variant-numeric:tabular-nums;box-shadow:var(--sh-1);
}
.step-body{display:flex;flex-direction:column;gap:10px;padding:20px;flex:1 1 auto;}
.step-title{font-size:19px;line-height:1.45;transition:color .2s ease;}
.step-desc{font-size:15px;line-height:1.75;color:var(--t-2);}
.step-link{margin-top:auto;font-size:14px;font-weight:600;color:var(--c-primary);}
.step-link:hover{color:var(--c-primary-dark);}
.step-card:hover .step-title{color:var(--c-primary);}

/* ---------- 提示带 ---------- */
.notice-section{padding:32px 0 64px;}
.notice-band{
  display:flex;align-items:center;gap:20px;
  background:var(--c-accent-light);border:1px solid #F3DFC6;border-left:4px solid var(--c-accent);
  border-radius:var(--r-lg);padding:20px 24px;
}
.notice-icon{
  width:40px;height:40px;border-radius:12px;background:#fff;color:var(--c-accent);
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;
}
.notice-band h3{font-size:18px;margin-bottom:4px;}
.notice-band p{font-size:15px;color:var(--t-2);}
.notice-band .btn{margin-left:auto;flex:0 0 auto;}

/* ---------- CTA ---------- */
.cta-band{
  background-color:var(--c-primary-light);
  background-image:linear-gradient(rgba(232,241,248,.92),rgba(232,241,248,.94)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  padding:40px 0;scroll-margin-top:100px;
}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;}
.cta-text h2{font-size:24px;line-height:1.35;margin-bottom:6px;color:var(--c-primary-dark);}
.cta-text p{font-size:15px;color:var(--t-2);}
.cta-actions{display:flex;gap:12px;flex:0 0 auto;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:#fff;border-top:1px solid var(--line);padding-top:56px;margin-top:64px;
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px;padding-bottom:48px;
}
.footer-col h4{font-size:16px;margin-bottom:16px;}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul li a{font-size:14px;color:var(--t-2);}
.footer-col ul li a:hover{color:var(--c-primary);text-decoration:underline;text-underline-offset:3px;}
.footer-about p{font-size:14px;color:var(--t-2);margin:14px 0 10px;max-width:34ch;}
.footer-keywords{font-size:13px;color:var(--t-3);line-height:1.7;}
.footer-contact li{font-size:14px;color:var(--t-2);}
.footer-contact strong{color:var(--t-1);font-weight:600;margin-right:6px;}
.footer-cta{margin-top:16px;}
.footer-bottom{border-top:1px solid var(--line);padding:20px 0;}
.footer-bottom-inner{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--t-3);
}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;
  border:0;background:var(--c-primary);color:#fff;z-index:90;
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-2);opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .24s ease,transform .24s ease,visibility .24s ease,background-color .2s ease;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:none;}
.to-top:hover{background:var(--c-primary-dark);}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .nav-link{padding:0 10px;font-size:13.5px;}
  .nav-link.is-active::after{left:10px;right:10px;}
}
@media (max-width:1119px){
  .nav-search{max-width:300px;}
  .nav-cta{display:none;}
}
@media (max-width:1023px){
  .page-hero h1{font-size:30px;}
  .stat-strip{grid-template-columns:repeat(2,1fr);}
  .stat-item:nth-child(2){border-right:0;}
  .stat-item:nth-child(1),.stat-item:nth-child(2){border-bottom:1px solid var(--line);}
  .toc{position:static;margin-bottom:28px;}
  .footer-grid{grid-template-columns:repeat(2,1fr);}
  .guide-section{padding:56px 0 8px;}
}
@media (max-width:900px){
  .nav-inner{
    display:grid;grid-template-columns:1fr auto;align-items:center;
    min-height:60px;padding-top:10px;padding-bottom:10px;gap:8px;
  }
  .brand{grid-column:1;grid-row:1;}
  .brand-name{font-size:18px;}
  .nav-toggle{grid-column:2;grid-row:1;display:inline-flex;}
  .nav-search{grid-column:1/-1;grid-row:2;display:none;max-width:none;margin-top:6px;}
  .nav-links{
    grid-column:1/-1;grid-row:3;display:none;flex-direction:column;align-items:stretch;
    gap:0;margin-left:0;padding-top:8px;
  }
  .nav-link{
    height:48px;justify-content:space-between;border-bottom:1px solid var(--line);
    border-radius:0;padding:0 4px;font-size:15px;
  }
  .nav-link.is-active::after{display:none;}
  .nav-link.is-active{border-bottom-color:var(--line);}
  .nav-cta{grid-column:1/-1;grid-row:4;display:none;width:100%;margin:14px 0 6px;}
  .nav-bar.menu-open .nav-search,
  .nav-bar.menu-open .nav-links,
  .nav-bar.menu-open .nav-cta{display:flex;}
  .nav-bar.menu-open .nav-links{display:flex;}
  .nav-bar.menu-open .nav-inner{padding-bottom:16px;}
}
@media (max-width:767px){
  .page-hero h1{font-size:26px;line-height:1.32;}
  .lead{font-size:16px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px;}
  .notice-band{flex-direction:column;align-items:flex-start;gap:14px;}
  .notice-band .btn{margin-left:0;width:100%;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;flex-direction:column;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:36px;}
  .guide-section{padding:40px 0 8px;}
  .notice-section{padding:24px 0 48px;}
  .site-footer{padding-top:48px;margin-top:48px;}
}
@media (max-width:599px){
  .container{padding:0 16px;}
  .stat-strip{grid-template-columns:1fr;}
  .stat-item{border-right:0;border-bottom:1px solid var(--line);}
  .stat-item:last-child{border-bottom:0;}
  .local-search{padding:20px;}
  .local-search-form{height:auto;flex-wrap:wrap;padding:12px;gap:10px;}
  .local-search-form input{width:100%;height:36px;flex:1 1 100%;}
  .local-search-form .btn{width:100%;height:40px;}
  .page-hero{padding-bottom:40px;}
  .cta-band{padding:32px 0;}
  .step-body{padding:18px;}
}

/* roulang page: category2 */
:root{
  --primary:#0F4E7E;
  --primary-dark:#0A3455;
  --primary-light:#E8F1F8;
  --accent:#E8842A;
  --accent-light:#FDF3E7;
  --text:#122A3E;
  --text-2:#4A6577;
  --text-3:#8AA0B0;
  --bg:#F7F9FB;
  --card:#FFFFFF;
  --border:#E4EBF1;
  --success:#2E9E6B;
  --danger:#D9534F;
  --r-xl:20px;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(18,42,62,.06);
  --sh-2:0 8px 24px rgba(18,42,62,.08);
  --sh-3:0 12px 32px rgba(18,42,62,.12);
  --nav-h:72px;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  letter-spacing:0;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
img{max-width:100%;display:block;border:0;}
a{color:var(--primary);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--primary-dark);}
button{font-family:inherit;}
input,button{font-size:inherit;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}
.num{font-variant-numeric:tabular-nums;}

/* ---------- 容器与栅格 ---------- */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:1440px){.container{max-width:1280px;}}
.g{display:grid;gap:24px;}
.g-2{grid-template-columns:repeat(2,minmax(0,1fr));}
.g-3{grid-template-columns:repeat(3,minmax(0,1fr));}
.g-4{grid-template-columns:repeat(4,minmax(0,1fr));}
@media (max-width:1023px){
  .g-3,.g-4{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:767px){
  .g-2,.g-3,.g-4{grid-template-columns:1fr;}
}

/* ---------- 顶部公告条 ---------- */
.topbar{background:var(--primary-light);border-bottom:1px solid var(--border);}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:40px;padding:6px 0;}
.topbar-text{font-size:13px;color:var(--primary-dark);}
.topbar-text strong{font-weight:600;color:var(--primary);}
.topbar-close{background:none;border:0;cursor:pointer;color:var(--text-3);line-height:0;padding:6px;border-radius:8px;transition:background .18s ease,color .18s ease;}
.topbar-close:hover{background:#fff;color:var(--primary);}

/* ---------- 导航 ---------- */
.nav-bar{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--border);box-shadow:var(--sh-1);}
.nav-inner{display:flex;align-items:center;gap:18px;min-height:var(--nav-h);}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{width:28px;height:28px;border-radius:8px;background:var(--primary);display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;}
.brand-mark svg{width:18px;height:18px;}
.brand-name{font-size:20px;font-weight:600;color:var(--primary-dark);white-space:nowrap;}
.nav-search{
  flex:1 1 auto;max-width:460px;margin:0 auto;position:relative;display:flex;align-items:center;
  height:44px;background:#F3F7FA;border:1px solid var(--border);border-radius:var(--r-pill);
  padding-left:44px;padding-right:6px;transition:box-shadow .2s ease,border-color .2s ease,background .2s ease;
}
.nav-search:focus-within{background:#fff;border-color:var(--primary);box-shadow:0 0 0 2px rgba(15,78,126,.14),var(--sh-2);}
.search-icon{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--primary);line-height:0;}
.nav-search input{
  flex:1 1 auto;min-width:0;height:100%;border:0;background:transparent;outline:none;
  font-size:15px;color:var(--text);
}
.nav-search input::placeholder{color:var(--text-3);}
.search-btn{
  flex:0 0 auto;height:34px;padding:0 18px;border:0;border-radius:var(--r-pill);
  background:var(--primary);color:#fff;font-size:14px;font-weight:600;cursor:pointer;
  transition:background .18s ease,transform .18s ease;
}
.search-btn:hover{background:var(--primary-dark);}
.search-btn:active{transform:translateY(1px);}
.nav-links{display:flex;align-items:center;gap:4px;flex:0 0 auto;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:40px;padding:0 12px;
  font-size:14px;color:var(--text-2);border-radius:var(--r-sm);white-space:nowrap;
  transition:color .18s ease,background .18s ease;
}
.nav-link:hover{color:var(--primary);background:var(--primary-light);}
.nav-link.is-active{color:var(--primary);font-weight:600;}
.nav-link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:var(--primary);
}
.nav-cta{flex:0 0 auto;}
.nav-toggle{
  display:none;flex:0 0 auto;background:#fff;border:1px solid var(--border);border-radius:var(--r-sm);
  width:44px;height:44px;align-items:center;justify-content:center;color:var(--primary-dark);cursor:pointer;
}
.nav-toggle:hover{background:var(--primary-light);}

/* 移动面板 */
.mobile-panel{
  position:fixed;top:var(--nav-h);left:0;right:0;bottom:0;background:#fff;z-index:55;
  padding:16px 20px 28px;overflow-y:auto;box-shadow:var(--sh-3);
  display:flex;flex-direction:column;gap:18px;
}
.mobile-panel[hidden]{display:none;}
.mobile-search{max-width:none;margin:0;width:100%;}
.mobile-links{display:flex;flex-direction:column;border-top:1px solid var(--border);}
.mobile-links a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:48px;padding:0 4px;font-size:15px;color:var(--text-2);border-bottom:1px solid var(--border);
}
.mobile-links a.is-active{color:var(--primary);font-weight:600;}
.mobile-links a::after{content:"›";color:var(--text-3);font-size:18px;}
.mobile-panel .btn{width:100%;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-sm);border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;white-space:nowrap;
  transition:background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease,transform .18s ease;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--sh-1);}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:#fff;color:var(--primary);border-color:#C8DAE8;}
.btn-ghost:hover{border-color:var(--primary);background:var(--primary-light);color:var(--primary-dark);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-link{background:none;border:0;color:var(--primary);padding:0;height:auto;font-weight:600;}
.btn-link:hover{color:var(--primary-dark);text-decoration:underline;}
.btn-sm{height:36px;padding:0 16px;font-size:14px;}
.btn:disabled{opacity:.4;cursor:not-allowed;transform:none;}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 10px;border-radius:var(--r-pill);
  background:var(--primary-light);color:var(--primary);font-size:13px;font-weight:600;line-height:1;
}
.badge-accent{background:var(--accent-light);color:#B4611A;}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 12px;border-radius:var(--r-pill);
  border:1px solid var(--border);background:#fff;font-size:13px;color:var(--text-2);
}

/* ---------- 首屏 ---------- */
.cat-hero{
  position:relative;overflow:hidden;background:#F2F7FB;border-bottom:1px solid var(--border);
  padding:44px 0 52px;
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(15,78,126,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(15,78,126,.05) 1px,transparent 1px);
  background-size:34px 34px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.7),transparent 78%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.7),transparent 78%);
  pointer-events:none;
}
.cat-hero::after{
  content:"";position:absolute;right:-140px;top:-120px;width:460px;height:460px;border-radius:50%;
  background:radial-gradient(circle,rgba(15,78,126,.12),rgba(15,78,126,0) 68%);
  pointer-events:none;
}
.hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:48px;align-items:center;}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:18px;flex-wrap:wrap;}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--primary);text-decoration:underline;}
.breadcrumb .sep{color:#C3D2DD;}
.breadcrumb .current{color:var(--text);font-weight:600;}
.hero-title{
  font-size:clamp(28px,3.4vw,40px);line-height:1.28;font-weight:700;color:var(--primary-dark);
  margin:14px 0 16px;
}
.hero-sub{font-size:17px;line-height:1.75;color:var(--text-2);max-width:560px;}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:26px;}
.hero-tags{display:flex;gap:22px;flex-wrap:wrap;margin-top:26px;}
.hero-tag{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--text-2);}
.hero-tag svg{width:18px;height:18px;color:var(--primary);}
.hero-media{position:relative;}
.hero-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-lg);box-shadow:var(--sh-2);background:#E9EEF4;}
.hero-float{
  position:absolute;right:-8px;bottom:-18px;background:#fff;border:1px solid var(--border);
  border-radius:var(--r-md);box-shadow:var(--sh-3);padding:12px 18px;display:flex;align-items:center;gap:14px;
}
.hero-float .fl-num{font-size:24px;font-weight:700;color:var(--primary);line-height:1;}
.hero-float .fl-txt{font-size:13px;color:var(--text-2);line-height:1.5;}

/* 锚点胶囊条 */
.anchor-bar{
  position:relative;z-index:1;display:flex;gap:10px;flex-wrap:wrap;margin-top:32px;
  border-top:1px dashed #C9DAE6;padding-top:20px;
}
.anchor-pill{
  display:inline-flex;align-items:center;height:34px;padding:0 16px;border-radius:var(--r-pill);
  background:#fff;border:1px solid var(--border);font-size:14px;color:var(--text-2);
  transition:all .18s ease;
}
.anchor-pill:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-light);}
.anchor-pill.is-active{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:600;}

/* ---------- 板块通用 ---------- */
.section{padding:72px 0;}
.section-tight{padding:56px 0;}
.section-head{max-width:720px;margin-bottom:36px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section-title{font-size:clamp(22px,2.4vw,26px);line-height:1.35;font-weight:600;color:var(--primary-dark);}
.section-title::before{
  content:"";display:inline-block;width:4px;height:20px;border-radius:2px;background:var(--accent);
  margin-right:12px;vertical-align:-2px;
}
.section-head.center .section-title::before{display:none;}
.section-desc{margin-top:12px;font-size:16px;color:var(--text-2);}

/* ---------- 卖点条 ---------- */
.value-bar{background:#fff;border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.value-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));}
.value-item{padding:26px 24px;border-left:1px solid var(--border);display:flex;gap:14px;align-items:flex-start;}
.value-item:first-child{border-left:0;}
.value-icon{
  flex:0 0 auto;width:38px;height:38px;border-radius:var(--r-sm);background:var(--primary-light);
  display:inline-flex;align-items:center;justify-content:center;color:var(--primary);
}
.value-icon svg{width:20px;height:20px;}
.value-name{font-size:16px;font-weight:600;color:var(--primary-dark);}
.value-text{font-size:14px;line-height:1.7;color:var(--text-2);margin-top:2px;}
@media (max-width:1023px){
  .value-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .value-item:nth-child(3){border-left:0;}
  .value-item:nth-child(n+3){border-top:1px solid var(--border);}
}
@media (max-width:600px){
  .value-grid{grid-template-columns:1fr;}
  .value-item{border-left:0;border-top:1px solid var(--border);}
  .value-item:first-child{border-top:0;}
}

/* ---------- 时间轴清单 ---------- */
.timeline{max-width:880px;margin:0 auto;}
.tl-item{position:relative;display:flex;gap:24px;padding-bottom:30px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item:not(:last-child)::before{
  content:"";position:absolute;left:21px;top:52px;bottom:6px;
  border-left:1px dashed #C6D8E5;
}
.tl-num{
  position:relative;z-index:1;flex:0 0 44px;width:44px;height:44px;border-radius:50%;
  background:#fff;border:1px solid #C6D8E5;display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;color:var(--accent);font-variant-numeric:tabular-nums;
  box-shadow:var(--sh-1);
}
.tl-card{
  flex:1 1 auto;min-width:0;background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);padding:22px 24px;transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
}
.tl-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:#D4E2EC;}
.tl-card h3{font-size:18px;font-weight:600;color:var(--primary-dark);line-height:1.45;}
.tl-card p{margin-top:10px;font-size:15px;line-height:1.85;color:var(--text-2);}
.tl-points{margin-top:14px;display:flex;flex-wrap:wrap;gap:10px 22px;}
.tl-points li{position:relative;padding-left:16px;font-size:14px;color:var(--text);}
.tl-points li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:2px;background:var(--accent);
}
.callout-band{
  display:flex;gap:14px;align-items:flex-start;background:var(--primary-light);
  border-left:4px solid var(--accent);border-radius:var(--r-md);
  padding:18px 22px;margin:0 0 30px 68px;
}
.callout-band svg{flex:0 0 auto;width:20px;height:20px;color:var(--accent);margin-top:4px;}
.callout-band p{font-size:15px;line-height:1.8;color:var(--primary-dark);}
@media (max-width:767px){
  .tl-item{gap:16px;}
  .tl-item:not(:last-child)::before{left:17px;top:48px;}
  .tl-num{flex:0 0 36px;width:36px;height:36px;font-size:13px;}
  .tl-card{padding:18px;}
  .callout-band{margin-left:0;}
}

/* ---------- 数据条 ---------- */
.stat-band{background:var(--primary-light);border-top:1px solid #D6E5F0;border-bottom:1px solid #D6E5F0;}
.stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));}
.stat-item{padding:30px 24px;text-align:center;border-left:1px solid #D6E5F0;}
.stat-item:first-child{border-left:0;}
.stat-num{font-size:28px;font-weight:700;color:var(--primary-dark);line-height:1.2;font-variant-numeric:tabular-nums;}
.stat-num span{font-size:15px;font-weight:600;color:var(--primary);margin-left:4px;}
.stat-label{margin-top:6px;font-size:13px;color:var(--text-2);}
@media (max-width:767px){
  .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .stat-item:nth-child(3){border-left:0;}
  .stat-item:nth-child(n+3){border-top:1px solid #D6E5F0;}
}

/* ---------- 场景卡 ---------- */
.scene-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--sh-1);display:flex;flex-direction:column;
  transition:box-shadow .2s ease,transform .2s ease;
}
.scene-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);}
.scene-card img{width:100%;aspect-ratio:16/9;object-fit:cover;background:#E9EEF4;}
.scene-body{padding:20px;display:flex;flex-direction:column;gap:10px;}
.scene-body h3{font-size:17px;font-weight:600;color:var(--primary-dark);line-height:1.45;}
.scene-body p{font-size:14px;line-height:1.8;color:var(--text-2);}

/* ---------- FAQ 折叠 ---------- */
.acc{max-width:880px;margin:0 auto;background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-1);}
.acc-item + .acc-item{border-top:1px solid var(--border);}
.acc-head{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;background:none;border:0;text-align:left;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--text);line-height:1.6;
  transition:background .2s ease,color .2s ease;
}
.acc-head:hover{background:#F4F8FB;color:var(--primary-dark);}
.acc-icon{
  flex:0 0 auto;width:28px;height:28px;border-radius:50%;border:1px solid #C6D8E5;
  display:inline-flex;align-items:center;justify-content:center;color:var(--primary);position:relative;
  transition:transform .22s ease,background .22s ease,color .22s ease,border-color .22s ease;
}
.acc-icon::before,.acc-icon::after{content:"";position:absolute;background:currentColor;border-radius:1px;}
.acc-icon::before{width:12px;height:2px;}
.acc-icon::after{width:2px;height:12px;transition:opacity .2s ease;}
.acc-item.is-open{background:var(--primary-light);box-shadow:inset 3px 0 0 var(--primary);}
.acc-item.is-open .acc-head{color:var(--primary-dark);}
.acc-item.is-open .acc-icon{background:var(--primary);border-color:var(--primary);color:#fff;transform:rotate(180deg);}
.acc-item.is-open .acc-icon::after{opacity:0;}
.acc-body{max-height:0;overflow:hidden;transition:max-height .26s ease;}
.acc-body-inner{padding:0 22px 22px;font-size:15px;line-height:1.85;color:var(--text-2);}

/* ---------- CTA 带 ---------- */
.cta-band{
  position:relative;overflow:hidden;background:var(--primary-light);
  border:1px solid #D6E5F0;border-radius:var(--r-xl);
  padding:36px 40px;display:flex;align-items:center;justify-content:space-between;gap:28px;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;bottom:-90px;width:280px;height:280px;border-radius:50%;
  background:repeating-linear-gradient(45deg,rgba(15,78,126,.07) 0 1px,rgba(15,78,126,0) 1px 10px);
  pointer-events:none;
}
.cta-copy{position:relative;z-index:1;max-width:620px;}
.cta-copy h2{font-size:24px;font-weight:600;color:var(--primary-dark);line-height:1.4;}
.cta-copy p{margin-top:8px;font-size:15px;color:var(--text-2);}
.cta-actions{position:relative;z-index:1;display:flex;gap:14px;flex-wrap:wrap;}
@media (max-width:767px){
  .cta-band{flex-direction:column;align-items:flex-start;padding:26px 22px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
}

/* ---------- 表单（占位 UI） ---------- */
.form-card{background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--sh-1);padding:24px;}
.form-row{display:flex;flex-direction:column;gap:8px;margin-bottom:16px;}
.form-row label{font-size:14px;font-weight:600;color:var(--text);}
.form-row input,.form-row textarea{
  width:100%;border:1px solid var(--border);border-radius:var(--r-md);background:#fff;
  padding:12px 14px;font-size:15px;color:var(--text);outline:none;transition:border-color .18s ease,box-shadow .18s ease;
}
.form-row input::placeholder,.form-row textarea::placeholder{color:var(--text-3);}
.form-row input:focus,.form-row textarea:focus{border-color:var(--primary);box-shadow:0 0 0 2px rgba(15,78,126,.14);}
.form-help{font-size:13px;color:var(--text-3);}

/* ---------- 页脚 ---------- */
.site-footer{background:#fff;border-top:1px solid var(--border);margin-top:8px;}
.footer-grid{
  display:grid;grid-template-columns:1.3fr 1fr 1fr 1.1fr;gap:36px;padding:56px 20px 40px;
}
.footer-col h4{font-size:15px;font-weight:600;color:var(--primary-dark);margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col ul a{font-size:14px;color:var(--text-2);}
.footer-col ul a:hover{color:var(--primary);text-decoration:underline;}
.footer-about p{margin-top:14px;font-size:14px;line-height:1.8;color:var(--text-2);max-width:320px;}
.footer-keywords{font-size:13px !important;color:var(--text-3) !important;line-height:1.7;}
.footer-contact li{font-size:14px;color:var(--text-2);}
.footer-contact strong{color:var(--text);font-weight:600;margin-right:8px;}
.footer-cta{margin-top:16px;}
.footer-bottom{border-top:1px solid var(--border);background:#FBFDFE;}
.footer-bottom-inner{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:18px 20px;font-size:13px;color:var(--text-3);
}
@media (max-width:1023px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));padding:48px 20px 32px;}
}
@media (max-width:600px){
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-about p{max-width:none;}
}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:20px;bottom:24px;width:46px;height:46px;border-radius:50%;
  background:#fff;border:1px solid var(--border);box-shadow:var(--sh-2);color:var(--primary);
  display:none;align-items:center;justify-content:center;cursor:pointer;z-index:50;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease;
}
.to-top.is-show{display:inline-flex;}
.to-top:hover{background:var(--primary-light);transform:translateY(-2px);box-shadow:var(--sh-3);}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .nav-search{max-width:360px;}
}
@media (max-width:1100px){
  .nav-links{display:none;}
  .nav-search{max-width:420px;}
}
@media (max-width:900px){
  :root{--nav-h:60px;}
  .nav-sm-hide{display:none;}
  .nav-cta{display:none;}
  .nav-search{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-inner{gap:12px;justify-content:space-between;}
  .hero-inner{grid-template-columns:1fr;gap:32px;}
  .hero-media{order:2;}
  .hero-float{right:12px;bottom:-14px;}
  .section{padding:56px 0;}
  .section-tight{padding:44px 0;}
  .cat-hero{padding:32px 0 40px;}
}
@media (max-width:599px){
  body{font-size:16px;}
  .container{padding:0 16px;}
  .footer-grid{padding:40px 16px 28px;}
  .hero-actions .btn{width:100%;max-width:320px;}
  .section{padding:44px 0;}
  .brand-name{font-size:17px;}
  .acc-head{padding:16px;font-size:15px;}
  .acc-body-inner{padding:0 16px 18px;}
}

/* roulang page: category3 */
:root{
  --c-primary:#0F4E7E;
  --c-primary-dark:#0A3455;
  --c-primary-light:#E8F1F8;
  --c-accent:#E8842A;
  --c-accent-light:#FDF3E7;
  --t-1:#122A3E;
  --t-2:#4A6577;
  --t-3:#8AA0B0;
  --bg:#F7F9FB;
  --card:#FFFFFF;
  --line:#E4EBF1;
  --ok:#2E9E6B;
  --warn:#D9534F;
  --img-ph:#E9EEF4;
  --r-card:16px;
  --r-sub:12px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(18,42,62,.06);
  --sh-2:0 8px 24px rgba(18,42,62,.08);
  --sh-3:0 12px 32px rgba(18,42,62,.12);
  --sp-1:4px; --sp-2:8px; --sp-3:12px; --sp-4:16px; --sp-5:24px; --sp-6:32px; --sp-7:48px; --sp-8:64px; --sp-9:96px;
  --pad-block:72px;
  --nav-h:72px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--t-1);
  background:var(--bg);
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--c-primary);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--c-primary-dark);}
button{font-family:inherit;cursor:pointer;}
input,button,select,textarea{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding-left:0;list-style:none;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px;}
.num{font-variant-numeric:tabular-nums;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}

/* ---------- 公告条 ---------- */
.top-strip{
  background:var(--c-primary-light);
  border-bottom:1px solid var(--line);
  font-size:13px;
  color:var(--c-primary-dark);
}
.top-strip .container{
  display:flex;align-items:center;justify-content:space-between;
  min-height:38px;gap:16px;
}
.top-strip p{margin:0;line-height:1.6;}
.top-strip p strong{font-weight:600;}
.strip-close{
  background:none;border:0;color:var(--t-2);font-size:16px;line-height:1;
  padding:6px;border-radius:6px;
}
.strip-close:hover{background:rgba(15,78,126,.08);color:var(--c-primary-dark);}
.top-strip.is-hidden{display:none;}

/* ---------- 导航 ---------- */
.nav-bar{
  position:sticky;top:0;z-index:120;
  background:#fff;
  border-bottom:1px solid var(--line);
  box-shadow:var(--sh-1);
}
.nav-inner{
  display:flex;align-items:center;gap:20px;
  min-height:var(--nav-h);
}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  text-decoration:none;flex:0 0 auto;
}
.brand-mark{
  width:28px;height:28px;border-radius:9px;
  background:linear-gradient(135deg,var(--c-primary),var(--c-primary-dark));
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:0 2px 6px rgba(10,52,85,.22);
}
.brand-mark svg{width:18px;height:18px;}
.brand-name{
  font-size:20px;font-weight:600;color:var(--c-primary-dark);
  letter-spacing:0;white-space:nowrap;
}
.nav-search{
  position:relative;
  display:flex;align-items:center;
  flex:1 1 360px;
  max-width:460px;
  height:44px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  padding-left:14px;
  transition:box-shadow .2s ease,border-color .2s ease;
}
.nav-search:focus-within{
  border-color:var(--c-primary);
  box-shadow:0 0 0 3px rgba(15,78,126,.12),var(--sh-2);
}
.search-icon{display:inline-flex;color:var(--c-primary);flex:0 0 auto;}
.nav-search input{
  flex:1 1 auto;height:100%;border:0;background:transparent;outline:none;
  font-size:15px;color:var(--t-1);padding:0 10px;min-width:0;
}
.nav-search input::placeholder{color:var(--t-3);}
.search-btn{
  flex:0 0 auto;height:34px;margin-right:5px;padding:0 16px;
  border:0;border-radius:var(--r-pill);
  background:var(--c-primary);color:#fff;font-size:14px;font-weight:600;
  transition:background .18s ease,transform .18s ease;
}
.search-btn:hover{background:var(--c-primary-dark);}
.search-btn:active{transform:translateY(1px);}
.nav-links{
  display:flex;align-items:center;gap:4px;margin-left:auto;flex:0 0 auto;
}
.nav-link{
  position:relative;
  padding:10px 12px;font-size:14px;color:var(--t-2);
  border-radius:8px;white-space:nowrap;
  transition:color .18s ease,background .18s ease;
}
.nav-link:hover{color:var(--c-primary);background:var(--c-primary-light);}
.nav-link.is-active{
  color:var(--c-primary-dark);font-weight:600;
}
.nav-link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--c-primary);border-radius:2px;
}
.nav-cta{flex:0 0 auto;}
.nav-toggle{
  display:none;
  width:44px;height:44px;align-items:center;justify-content:center;
  border:1px solid var(--line);background:#fff;border-radius:10px;color:var(--c-primary-dark);
}
.nav-toggle:hover{background:var(--c-primary-light);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background .18s ease,color .18s ease,box-shadow .18s ease,transform .18s ease,border-color .18s ease;
  text-decoration:none;
}
.btn-sm{height:36px;padding:0 16px;font-size:14px;}
.btn-lg{height:50px;padding:0 28px;font-size:16px;}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 2px 8px rgba(15,78,126,.24);}
.btn-primary:hover{background:var(--c-primary-dark);color:#fff;transform:translateY(-1px);box-shadow:0 8px 20px rgba(10,52,85,.24);}
.btn-primary:active{transform:translateY(1px);box-shadow:var(--sh-1);}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:var(--c-primary);}
.btn-ghost:hover{background:var(--c-primary-light);color:var(--c-primary-dark);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-text{background:transparent;color:var(--c-primary);padding:0 4px;height:auto;}
.btn-text:hover{color:var(--c-primary-dark);text-decoration:underline;text-underline-offset:4px;}
.btn-accent{background:var(--c-accent);color:#fff;box-shadow:0 2px 8px rgba(232,132,42,.28);}
.btn-accent:hover{background:#cf721d;color:#fff;transform:translateY(-1px);}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--c-primary-light);color:var(--c-primary-dark);
  font-size:13px;font-weight:600;line-height:1;
  padding:7px 12px;border-radius:var(--r-pill);white-space:nowrap;
}
.badge-accent{background:var(--c-accent-light);color:#B45F13;}

/* ---------- 面包屑 ---------- */
.crumbs{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:13px;color:var(--t-2);
}
.crumbs a{color:var(--t-2);}
.crumbs a:hover{color:var(--c-primary);}
.crumbs .sep{color:var(--t-3);}
.crumbs .current{color:var(--t-1);font-weight:600;}

/* ---------- 页面 Hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  border-bottom:1px solid var(--line);
}
.hero-bg{
  position:absolute;inset:0;z-index:0;
  background-image:
    linear-gradient(180deg,rgba(232,241,248,.95) 0%,rgba(247,249,251,.98) 78%),
    url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
}
.hero-grid{
  position:absolute;inset:0;z-index:1;opacity:.5;
  background-image:
    repeating-linear-gradient(0deg,rgba(15,78,126,.06) 0 1px,transparent 1px 48px),
    repeating-linear-gradient(90deg,rgba(15,78,126,.06) 0 1px,transparent 1px 48px);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent);
}
.page-hero-inner{
  position:relative;z-index:2;
  padding-top:56px;padding-bottom:48px;
  text-align:center;
}
.page-hero .crumbs{justify-content:center;margin-bottom:20px;}
.page-hero h1{
  font-size:clamp(26px,3.4vw,38px);
  line-height:1.3;font-weight:700;color:var(--c-primary-dark);
  max-width:820px;margin:18px auto 0;
}
.hero-sub{
  margin:16px auto 0;max-width:640px;
  font-size:17px;line-height:1.75;color:var(--t-2);
}
.pill-filter{
  display:flex;flex-wrap:wrap;justify-content:center;gap:10px;
  margin-top:28px;
}
.pill{
  height:38px;padding:0 18px;
  display:inline-flex;align-items:center;
  border:1px solid var(--line);background:#fff;color:var(--t-2);
  border-radius:var(--r-pill);font-size:14px;font-weight:600;
  transition:all .18s ease;
}
.pill:hover{border-color:var(--c-primary);color:var(--c-primary);transform:translateY(-1px);}
.pill.is-active{
  background:var(--c-primary);border-color:var(--c-primary);color:#fff;
  box-shadow:0 6px 16px rgba(15,78,126,.22);
}

/* ---------- 通用板块 ---------- */
.section{padding-top:var(--pad-block);padding-bottom:var(--pad-block);}
.section-tint{background:var(--c-primary-light);}
.section-plain{background:#fff;}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  margin-bottom:32px;flex-wrap:wrap;
}
.section-head h2{
  font-size:26px;line-height:1.4;font-weight:600;color:var(--c-primary-dark);
}
.section-head p{
  margin-top:10px;font-size:15px;color:var(--t-2);max-width:640px;
}
.section-head.center{flex-direction:column;align-items:center;text-align:center;}
.section-head.center p{margin-left:auto;margin-right:auto;}

/* ---------- 场景矩阵 ---------- */
.matrix-row{margin-bottom:24px;}
.matrix-row:last-child{margin-bottom:0;}
.matrix-card{
  display:flex;flex-direction:column;height:100%;
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh-1);
  overflow:hidden;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.matrix-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#CFE0EC;}
.matrix-card.is-filtered{display:none;}
.card-media{
  position:relative;width:100%;background:var(--img-ph);overflow:hidden;
}
.ratio-16x9{aspect-ratio:16 / 9;}
.ratio-4x3{aspect-ratio:4 / 3;}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.matrix-card:hover .card-media img{transform:scale(1.03);}
.card-media .media-tag{
  position:absolute;left:12px;top:12px;
}
.card-media .media-tag .badge{background:rgba(255,255,255,.94);color:var(--c-primary-dark);box-shadow:var(--sh-1);}
.card-body{
  padding:20px;display:flex;flex-direction:column;gap:12px;flex:1 1 auto;
}
.card-body h3{
  font-size:19px;line-height:1.5;font-weight:600;color:var(--t-1);
}
.matrix-card:hover .card-body h3{color:var(--c-primary);}
.card-body p{font-size:15px;line-height:1.75;color:var(--t-2);}
.card-foot{
  margin-top:auto;padding-top:12px;border-top:1px dashed var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.card-foot .more{
  font-size:14px;font-weight:600;color:var(--c-primary);
  display:inline-flex;align-items:center;gap:6px;
}
.card-foot .more::after{content:"→";transition:transform .18s ease;}
.matrix-card:hover .card-foot .more::after{transform:translateX(3px);}
.card-foot .meta{font-size:13px;color:var(--t-3);font-variant-numeric:tabular-nums;}
.matrix-side{display:flex;flex-direction:column;gap:24px;height:100%;}
.matrix-side .matrix-card{flex:1 1 auto;}
.matrix-card--lg .card-body{padding:24px;}
.matrix-card--lg .card-body h3{font-size:22px;}
.matrix-card--lg .card-body p{font-size:16px;}

/* ---------- 深色节奏区块 ---------- */
.deep{
  position:relative;color:#EAF2F8;overflow:hidden;
  background:linear-gradient(160deg,#0A3455 0%,#0F4E7E 62%,#12598F 100%);
}
.deep::after{
  content:"";position:absolute;right:-80px;top:-80px;width:340px;height:340px;
  border-radius:50%;background:radial-gradient(circle,rgba(232,132,42,.28),transparent 68%);
}
.deep .container{position:relative;z-index:1;}
.deep h2{
  font-size:26px;font-weight:600;color:#fff;line-height:1.4;
}
.deep .lead{margin-top:12px;font-size:15px;color:#BBD3E4;max-width:680px;}
.metric-grid{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;
  margin-top:36px;
}
.metric-card{
  background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.16);
  border-radius:var(--r-card);
  padding:24px;
  transition:background .2s ease,transform .2s ease,border-color .2s ease;
}
.metric-card:hover{background:rgba(255,255,255,.12);transform:translateY(-2px);border-color:rgba(255,255,255,.28);}
.metric-card .metric-no{
  font-size:13px;font-weight:700;color:var(--c-accent);
  letter-spacing:.06em;font-variant-numeric:tabular-nums;
}
.metric-card h3{margin-top:10px;font-size:18px;font-weight:600;color:#fff;}
.metric-card p{margin-top:10px;font-size:14px;line-height:1.75;color:#BBD3E4;}
.bar-list{margin-top:40px;display:grid;gap:18px;}
.bar-item{display:grid;grid-template-columns:130px 1fr 54px;align-items:center;gap:16px;}
.bar-item .bar-label{font-size:14px;color:#D6E5F0;}
.bar-track{height:10px;border-radius:999px;background:rgba(255,255,255,.16);overflow:hidden;}
.bar-fill{height:100%;border-radius:999px;background:linear-gradient(90deg,var(--c-accent),#F2A85C);}
.bar-item .bar-val{
  font-size:14px;font-weight:600;color:#fff;text-align:right;
  font-variant-numeric:tabular-nums;
}

/* ---------- 统计条 ---------- */
.stat-bar{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;
}
.stat-item{
  padding:28px 24px;text-align:center;
  border-right:1px solid var(--line);
}
.stat-item:last-child{border-right:0;}
.stat-item .stat-num{
  font-size:28px;font-weight:700;color:var(--c-primary-dark);line-height:1.2;
  font-variant-numeric:tabular-nums;
}
.stat-item .stat-num span{font-size:16px;font-weight:600;margin-left:2px;color:var(--c-primary);}
.stat-item .stat-label{margin-top:8px;font-size:13px;color:var(--t-2);}

/* ---------- FAQ ---------- */
.faq-list{
  border:1px solid var(--line);border-radius:var(--r-card);
  background:#fff;box-shadow:var(--sh-1);overflow:hidden;
  max-width:900px;
}
.faq-item + .faq-item{border-top:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:none;border:0;text-align:left;
  padding:20px 22px;font-size:16px;font-weight:600;color:var(--t-1);
  transition:background .18s ease,color .18s ease;
}
.faq-q:hover{background:var(--c-primary-light);color:var(--c-primary-dark);}
.faq-q .icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--c-primary);color:var(--c-primary);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:16px;line-height:1;font-weight:600;
  transition:background .18s ease,color .18s ease,transform .2s ease;
}
.faq-item.is-open .faq-q{background:var(--c-primary-light);color:var(--c-primary-dark);box-shadow:inset 3px 0 0 var(--c-primary);}
.faq-item.is-open .faq-q .icon{background:var(--c-primary);color:#fff;transform:rotate(45deg);}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .25s ease;
}
.faq-a p{
  padding:0 22px 22px;font-size:15px;line-height:1.85;color:var(--t-2);
}
.faq-item.is-open .faq-a{max-height:320px;}

/* ---------- CTA 带 ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-card);
  border:1px solid #CFE0EC;
  box-shadow:var(--sh-2);
}
.cta-band .cta-bg{
  position:absolute;inset:0;
  background-image:linear-gradient(96deg,rgba(232,241,248,.95) 0%,rgba(255,255,255,.9) 60%,rgba(253,243,231,.86) 100%),
    url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center right;
}
.cta-band .cta-grid-lines{
  position:absolute;inset:0;opacity:.45;
  background-image:repeating-linear-gradient(90deg,rgba(15,78,126,.07) 0 1px,transparent 1px 56px);
}
.cta-inner{
  position:relative;z-index:1;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  padding:40px 44px;
}
.cta-inner h2{font-size:24px;line-height:1.4;font-weight:600;color:var(--c-primary-dark);}
.cta-inner p{margin-top:10px;font-size:15px;color:var(--t-2);max-width:560px;}
.cta-actions{display:flex;gap:12px;flex:0 0 auto;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:#fff;border-top:1px solid var(--line);
  margin-top:var(--pad-block);
}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px;
  padding-top:56px;padding-bottom:40px;
}
.footer-col h4{
  font-size:15px;font-weight:600;color:var(--c-primary-dark);
  margin-bottom:16px;letter-spacing:.01em;
}
.footer-col ul{display:grid;gap:10px;}
.footer-col ul a{font-size:14px;color:var(--t-2);}
.footer-col ul a:hover{color:var(--c-primary);text-decoration:underline;text-underline-offset:3px;}
.footer-about p{margin-top:16px;font-size:14px;line-height:1.8;color:var(--t-2);max-width:320px;}
.footer-keywords{
  font-size:13px;color:var(--t-3);line-height:1.8;
}
.footer-contact li{font-size:14px;color:var(--t-2);}
.footer-contact strong{color:var(--t-1);font-weight:600;margin-right:6px;}
.footer-cta{margin-top:18px;}
.footer-bottom{
  border-top:1px solid var(--line);
  background:#FBFDFE;
}
.footer-bottom-inner{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding-top:18px;padding-bottom:18px;
  font-size:13px;color:var(--t-3);flex-wrap:wrap;
}

/* ---------- 返回顶部 ---------- */
.back-top{
  position:fixed;right:20px;bottom:24px;z-index:150;
  width:46px;height:46px;border-radius:50%;
  border:1px solid var(--line);background:#fff;color:var(--c-primary);
  box-shadow:var(--sh-2);
  display:inline-flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:all .22s ease;
}
.back-top.is-show{opacity:1;visibility:visible;transform:translateY(0);}
.back-top:hover{background:var(--c-primary);color:#fff;border-color:var(--c-primary);}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{max-width:1200px;}
}
@media (max-width:1023px){
  :root{--pad-block:56px;}
  .metric-grid{grid-template-columns:1fr;gap:16px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .stat-bar{grid-template-columns:repeat(2,minmax(0,1fr));}
  .stat-item:nth-child(2){border-right:0;}
  .stat-item:nth-child(1),.stat-item:nth-child(2){border-bottom:1px solid var(--line);}
  .nav-search{max-width:320px;}
}
@media (max-width:900px){
  :root{--nav-h:60px;}
  .nav-inner{gap:12px;}
  .nav-search,.nav-links,.nav-cta{display:none;}
  .nav-toggle{display:inline-flex;margin-left:auto;}
  .nav-bar.is-open .nav-inner{flex-wrap:wrap;padding-bottom:16px;}
  .nav-bar.is-open .nav-search{
    display:flex;order:3;width:100%;max-width:none;margin-top:12px;flex:1 1 100%;
  }
  .nav-bar.is-open .nav-links{
    display:flex;order:4;flex-direction:column;width:100%;margin:10px 0 0;gap:0;
    align-items:stretch;
  }
  .nav-bar.is-open .nav-link{
    display:flex;align-items:center;justify-content:space-between;
    min-height:48px;padding:0 8px;font-size:15px;border-radius:8px;
    border-bottom:1px solid var(--line);
  }
  .nav-bar.is-open .nav-link:last-child{border-bottom:0;}
  .nav-bar.is-open .nav-link::after{display:none;}
  .nav-bar.is-open .nav-link.is-active{
    color:var(--c-primary-dark);background:var(--c-primary-light);
    box-shadow:inset 3px 0 0 var(--c-primary);
  }
  .nav-bar.is-open .nav-cta{
    display:inline-flex;order:5;width:100%;margin-top:14px;justify-content:center;
  }
  .page-hero-inner{padding-top:36px;padding-bottom:34px;}
  .cta-inner{flex-direction:column;align-items:flex-start;padding:32px 24px;gap:22px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 180px;}
  .bar-item{grid-template-columns:96px 1fr 44px;}
}
@media (max-width:767px){
  .matrix-side{gap:20px;margin-top:24px;}
  .matrix-row .cell + .cell{margin-top:0;}
  .section-head{margin-bottom:24px;}
  .section-head h2{font-size:22px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-top:44px;}
  .footer-about p{max-width:none;}
  .card-body{padding:18px;}
}
@media (max-width:599px){
  :root{--pad-block:40px;}
  .container{padding-left:16px;padding-right:16px;}
  .brand-name{font-size:17px;}
  .page-hero h1{font-size:24px;}
  .hero-sub{font-size:16px;}
  .pill{height:36px;padding:0 14px;font-size:13px;}
  .stat-bar{grid-template-columns:1fr;}
  .stat-item{border-right:0;border-bottom:1px solid var(--line);padding:22px 18px;}
  .stat-item:last-child{border-bottom:0;}
  .stat-item .stat-num{font-size:24px;}
  .cta-actions{flex-direction:column;align-items:stretch;}
  .cta-actions .btn{width:100%;max-width:320px;}
  .footer-bottom-inner{flex-direction:column;align-items:flex-start;gap:6px;}
  .faq-q{font-size:15px;padding:16px;}
  .faq-a p{padding:0 16px 18px;}
}

/* roulang page: category4 */
:root{
  --c-primary:#0F4E7E;
  --c-primary-dark:#0A3455;
  --c-primary-light:#E8F1F8;
  --c-accent:#E8842A;
  --c-accent-light:#FDF3E7;
  --t-main:#122A3E;
  --t-sub:#4A6577;
  --t-weak:#8AA0B0;
  --bg:#F7F9FB;
  --card:#FFFFFF;
  --line:#E4EBF1;
  --ok:#2E9E6B;
  --warn:#D9534F;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(18,42,62,.06);
  --sh-2:0 8px 24px rgba(18,42,62,.08);
  --sh-3:0 12px 32px rgba(18,42,62,.12);
  --sp-1:4px; --sp-2:8px; --sp-3:12px; --sp-4:16px; --sp-5:24px; --sp-6:32px; --sp-7:48px; --sp-8:64px; --sp-9:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--t-main);
  background:var(--bg);
  letter-spacing:0;
}
img{max-width:100%;height:auto;display:block;border-radius:var(--r-md)}
a{color:var(--c-primary);text-decoration:none}
a:hover{color:var(--c-primary-dark);text-decoration:underline}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding-left:1.4em}
button{font-family:inherit;cursor:pointer}
input,select,textarea{font-family:inherit;font-size:16px}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:1440px){.container{max-width:1280px}}
.num{font-variant-numeric:tabular-nums}

/* ---------- 顶部导航 ---------- */
.nav-bar{position:sticky;top:0;z-index:80;background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--sh-1)}
.nav-inner{display:flex;align-items:center;gap:20px;min-height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;flex:0 0 auto}
.brand:hover{text-decoration:none}
.brand-mark{width:28px;height:28px;border-radius:8px;background:linear-gradient(135deg,var(--c-primary),var(--c-primary-dark));display:grid;place-items:center;flex:0 0 auto}
.brand-mark svg{width:16px;height:16px}
.brand-name{font-size:20px;font-weight:600;color:var(--c-primary-dark);white-space:nowrap}
.nav-search{flex:1 1 320px;max-width:480px;display:flex;align-items:center;gap:10px;height:44px;padding:4px 4px 4px 14px;background:#fff;border:1px solid var(--line);border-radius:var(--r-pill);transition:border-color .2s,box-shadow .2s}
.nav-search:hover{border-color:#CFDCE6}
.nav-search:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 2px rgba(15,78,126,.16),var(--sh-1)}
.search-icon{display:inline-flex;color:var(--c-primary);flex:0 0 auto}
.nav-search input[type="search"]{flex:1 1 auto;min-width:0;height:100%;border:0;outline:0;background:transparent;font-size:14px;color:var(--t-main)}
.nav-search input[type="search"]::placeholder{color:var(--t-weak)}
.search-btn{flex:0 0 auto;height:36px;padding:0 18px;border:0;border-radius:var(--r-pill);background:var(--c-primary);color:#fff;font-size:14px;transition:background .2s,transform .15s}
.search-btn:hover{background:var(--c-primary-dark)}
.search-btn:active{transform:translateY(1px)}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-link{position:relative;padding:8px 10px;font-size:14px;color:var(--t-sub);border-radius:8px;white-space:nowrap;transition:color .18s,background .18s}
.nav-link:hover{color:var(--c-primary);background:var(--c-primary-light);text-decoration:none}
.nav-link.is-active{color:var(--c-primary-dark);font-weight:600}
.nav-link.is-active::after{content:"";position:absolute;left:10px;right:10px;bottom:2px;height:2px;border-radius:2px;background:var(--c-primary)}
.nav-cta{margin-left:6px}
.nav-toggle,.nav-icon-btn{display:none;align-items:center;justify-content:center;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r-sm);background:#fff;color:var(--c-primary-dark)}
.nav-toggle:hover,.nav-icon-btn:hover{background:var(--c-primary-light);border-color:#CFDCE6}
.nav-icon-btn{margin-left:auto}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 20px;border-radius:var(--r-sm);font-size:15px;font-weight:600;border:1px solid transparent;transition:background .2s,color .2s,box-shadow .2s,transform .15s,border-color .2s}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 2px 8px rgba(15,78,126,.22)}
.btn-primary:hover{background:var(--c-primary-dark);color:#fff;box-shadow:0 8px 20px rgba(15,78,126,.26)}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:#C9DAE6}
.btn-ghost:hover{background:var(--c-primary-light);color:var(--c-primary-dark);border-color:var(--c-primary)}
.btn-accent{background:var(--c-accent);color:#fff}
.btn-accent:hover{background:#CF711F;color:#fff}
.btn-sm{height:36px;padding:0 14px;font-size:14px;border-radius:8px}
.btn-block{width:100%}
.btn[disabled]{opacity:.4;cursor:not-allowed;transform:none}

/* ---------- 徽章 / 标签 ---------- */
.badge{display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:var(--r-pill);background:var(--c-primary-light);color:var(--c-primary);font-size:13px;font-weight:600;line-height:1}
.badge-accent{background:var(--c-accent-light);color:#B96318}
.tag{display:inline-flex;align-items:center;height:34px;padding:0 14px;border-radius:var(--r-pill);background:#fff;border:1px solid var(--line);color:var(--t-sub);font-size:13px;transition:.18s}
.tag:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-light);text-decoration:none}

/* ---------- 面包屑 ---------- */
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--t-weak);padding:20px 0 0}
.crumb a{color:var(--t-sub)}
.crumb a:hover{color:var(--c-primary)}
.crumb .sep{color:#C3D1DC}
.crumb .current{color:var(--t-main);font-weight:600}

/* ---------- Hero ---------- */
.page-hero{position:relative;overflow:hidden;background:linear-gradient(180deg,var(--c-primary-light) 0%,rgba(232,241,248,.45) 62%,var(--bg) 100%)}
.page-hero::before{content:"";position:absolute;inset:0;background-image:repeating-linear-gradient(0deg,rgba(15,78,126,.05) 0 1px,transparent 1px 48px),repeating-linear-gradient(90deg,rgba(15,78,126,.05) 0 1px,transparent 1px 48px);opacity:.7;pointer-events:none}
.page-hero .container{position:relative;z-index:1}
.hero-grid{padding:36px 0 64px}
.hero-copy h1{font-size:36px;line-height:1.28;font-weight:700;color:var(--c-primary-dark)}
.hero-copy h1 em{font-style:normal;color:var(--c-accent)}
.hero-lead{margin-top:16px;font-size:17px;line-height:1.75;color:var(--t-sub);max-width:620px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;justify-content:flex-start}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-figure{position:relative;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-2);aspect-ratio:4/3;background:#E9EEF4}
.hero-figure img{width:100%;height:100%;object-fit:cover;border-radius:0}
.hero-float{position:absolute;left:20px;bottom:20px;background:#fff;border-radius:var(--r-md);box-shadow:var(--sh-3);padding:14px 18px;display:flex;align-items:center;gap:14px}
.hero-float strong{font-size:26px;color:var(--c-primary-dark);line-height:1}
.hero-float span{font-size:13px;color:var(--t-sub);line-height:1.5}

/* ---------- 指标条 ---------- */
.metrics{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.metrics-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:28px 0}
.metric{position:relative;padding-left:18px}
.metric::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;border-radius:2px;background:var(--c-accent)}
.metric strong{display:block;font-size:28px;font-weight:700;color:var(--c-primary-dark);line-height:1.2;font-variant-numeric:tabular-nums}
.metric span{display:block;margin-top:4px;font-size:13px;color:var(--t-weak)}

/* ---------- 主体区块 ---------- */
.section{padding:64px 0 8px}
.section-head{margin-bottom:28px}
.section-head h2{font-size:25px;font-weight:600;color:var(--c-primary-dark);line-height:1.35}
.section-head p{margin-top:10px;font-size:15px;color:var(--t-sub);max-width:720px}

.qa-group{margin-bottom:36px;scroll-margin-top:96px}
.group-title{position:relative;padding-left:14px;font-size:19px;font-weight:600;color:var(--c-primary-dark);line-height:1.45;margin-bottom:16px}
.group-title::before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:4px;border-radius:3px;background:var(--c-primary)}
.group-title .count{font-size:13px;font-weight:400;color:var(--t-weak);margin-left:8px}
.qa-list{display:flex;flex-direction:column;gap:12px}
.qa-item{background:#fff;border:1px solid var(--line);border-left:3px solid transparent;border-radius:var(--r-md);box-shadow:var(--sh-1);overflow:hidden;transition:border-color .2s,background .2s,box-shadow .2s}
.qa-item:hover{box-shadow:var(--sh-2)}
.qa-item.is-open{background:var(--c-primary-light);border-left-color:var(--c-primary);box-shadow:var(--sh-2)}
.qa-head{margin:0}
.qa-q{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;padding:16px 18px;border:0;background:transparent;text-align:left;font-size:16px;font-weight:600;color:var(--t-main);line-height:1.6}
.qa-item.is-open .qa-q{color:var(--c-primary-dark)}
.qa-icon{position:relative;flex:0 0 auto;width:28px;height:28px;border-radius:var(--r-pill);background:#fff;border:1px solid #D3E2EC;transition:background .2s,border-color .2s,transform .2s}
.qa-icon::before,.qa-icon::after{content:"";position:absolute;left:50%;top:50%;background:var(--c-primary);border-radius:2px;transform:translate(-50%,-50%)}
.qa-icon::before{width:12px;height:2px}
.qa-icon::after{width:2px;height:12px;transition:opacity .2s,transform .2s}
.qa-item.is-open .qa-icon{background:var(--c-primary);border-color:var(--c-primary)}
.qa-item.is-open .qa-icon::before{background:#fff}
.qa-item.is-open .qa-icon::after{opacity:0;transform:translate(-50%,-50%) rotate(90deg)}
.qa-panel{max-height:0;overflow:hidden;transition:max-height .22s ease}
.qa-body{padding:0 18px 18px;font-size:15px;line-height:1.85;color:var(--t-sub)}
.qa-body p+p{margin-top:10px}
.qa-body strong{color:var(--t-main)}

/* ---------- 侧栏 ---------- */
.side-col{display:flex;flex-direction:column;gap:20px}
.sticky-wrap{position:static}
.side-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-2);padding:22px}
.side-card h3{font-size:17px;font-weight:600;color:var(--c-primary-dark);margin-bottom:12px}
.side-card p{font-size:14px;color:var(--t-sub);line-height:1.8}
.side-list{list-style:none;padding:0;margin:14px 0 0;display:flex;flex-direction:column;gap:10px}
.side-list li{display:flex;gap:10px;font-size:14px;color:var(--t-sub);line-height:1.7}
.side-list li i{flex:0 0 auto;width:18px;height:18px;margin-top:5px;border-radius:var(--r-pill);background:var(--c-accent-light);color:#B96318;font-style:normal;font-size:11px;display:grid;place-items:center;font-weight:700}
.side-card.primary{background:var(--c-primary-light);border-color:#CFE0ED}
.side-card.primary .btn{margin-top:16px}
.side-links{list-style:none;padding:0;margin:0;display:flex;flex-direction:column}
.side-links li+li{border-top:1px dashed var(--line)}
.side-links a{display:flex;align-items:center;justify-content:space-between;gap:10px;min-height:44px;font-size:14px;color:var(--t-sub)}
.side-links a:hover{color:var(--c-primary);text-decoration:none}
.side-links a span{color:var(--t-weak);font-variant-numeric:tabular-nums}

/* ---------- 表单 ---------- */
.form-block{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-2);padding:28px}
.form-row{margin-bottom:20px}
.form-row label{display:block;font-size:14px;font-weight:600;color:var(--t-main);margin-bottom:8px}
.form-row input[type="text"],
.form-row input[type="tel"],
.form-row select,
.form-row textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:var(--r-md);background:#fff;color:var(--t-main);font-size:15px;line-height:1.5;transition:border-color .18s,box-shadow .18s}
.form-row input:focus,.form-row select:focus,.form-row textarea:focus{outline:0;border-color:var(--c-primary);box-shadow:0 0 0 2px rgba(15,78,126,.16)}
.form-row textarea{min-height:120px;resize:vertical}
.form-help{display:block;margin-top:6px;font-size:12px;color:var(--t-weak)}
.form-actions{display:flex;flex-wrap:wrap;align-items:center;gap:14px}
.form-actions .note{font-size:13px;color:var(--t-weak)}

/* ---------- CTA 带 ---------- */
.cta-band{position:relative;margin:64px 0 0;background-color:var(--c-primary-light);background-image:linear-gradient(rgba(232,241,248,.92),rgba(232,241,248,.92)),url('/assets/images/backpic/back-2.webp');background-size:cover;background-position:center;border-top:1px solid #DCE9F3;border-bottom:1px solid #DCE9F3}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;padding:44px 0}
.cta-copy h2{font-size:24px;font-weight:600;color:var(--c-primary-dark);line-height:1.4}
.cta-copy p{margin-top:8px;font-size:15px;color:var(--t-sub)}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;flex:0 0 auto}

/* ---------- 页脚 ---------- */
.site-footer{margin-top:0;background:#fff;border-top:1px solid var(--line)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding:56px 0 40px}
.footer-col h4{font-size:15px;font-weight:600;color:var(--c-primary-dark);margin-bottom:16px}
.footer-col ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--t-sub)}
.footer-col a:hover{color:var(--c-primary);text-decoration:underline}
.footer-about .brand{margin-bottom:16px}
.footer-about p{font-size:14px;color:var(--t-sub);line-height:1.8;max-width:340px}
.footer-keywords{margin-top:12px;font-size:13px;color:var(--t-weak)}
.footer-contact li{font-size:14px;color:var(--t-sub)}
.footer-contact strong{display:block;font-size:13px;color:var(--t-weak);font-weight:600}
.footer-cta{margin-top:18px}
.footer-bottom{border-top:1px solid var(--line);background:var(--bg)}
.footer-bottom-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;padding:18px 0;font-size:13px;color:var(--t-weak)}

/* ---------- 返回顶部 ---------- */
.to-top{position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:var(--r-pill);border:1px solid var(--line);background:#fff;color:var(--c-primary);box-shadow:var(--sh-2);display:grid;place-items:center;opacity:0;visibility:hidden;transform:translateY(8px);transition:.22s;z-index:70}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--c-primary-light);box-shadow:var(--sh-3)}

/* ---------- 响应式 ---------- */
@media (min-width:1024px){
  .sticky-wrap{position:sticky;top:96px}
}
@media (max-width:1023px){
  .section{padding:48px 0 8px}
  .hero-copy h1{font-size:30px}
  .metrics-grid{grid-template-columns:repeat(2,1fr);gap:20px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:44px 0 32px}
  .metrics-grid{padding:24px 0}
}
@media (max-width:900px){
  .nav-inner{flex-wrap:wrap;min-height:60px;gap:12px}
  .nav-search,.nav-links{display:none}
  .nav-icon-btn,.nav-toggle{display:inline-flex}
  .nav-cta{display:none}
  .nav-bar.menu-open .nav-search{display:flex;order:5;flex:1 0 100%;max-width:none;margin:4px 0 12px}
  .nav-bar.menu-open .nav-links{display:flex;order:6;flex:1 0 100%;flex-direction:column;align-items:stretch;margin:0 0 16px;gap:0}
  .nav-bar.menu-open .nav-link{display:flex;align-items:center;justify-content:space-between;min-height:48px;padding:0 12px;border-bottom:1px solid var(--line);border-radius:0;font-size:15px}
  .nav-bar.menu-open .nav-link::after{display:none}
  .nav-bar.menu-open .nav-link.is-active{background:var(--c-primary-light)}
  .side-col{margin-top:32px}
  .cta-inner{flex-direction:column;align-items:flex-start;gap:20px;padding:36px 0}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .hero-grid{padding:24px 0 44px}
  .hero-copy h1{font-size:26px}
  .hero-lead{font-size:16px}
  .hero-actions .btn{width:100%;max-width:320px}
  .metrics-grid{grid-template-columns:1fr 1fr;gap:16px}
  .metric strong{font-size:24px}
  .section{padding:40px 0 8px}
  .section-head h2{font-size:22px}
  .form-block{padding:20px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding:40px 0 28px}
  .footer-bottom-inner{flex-direction:column;align-items:flex-start}
  .qa-q{font-size:15px}
  .cta-actions .btn{width:100%;max-width:320px}
  .to-top{right:16px;bottom:16px}
}
@media (max-width:520px){
  .metrics-grid{grid-template-columns:1fr}
  .hero-tags{gap:8px}
}