/* roulang page: index */
:root{
  --color-primary:#1F6F7A;
  --color-primary-dark:#14515C;
  --color-primary-light:#E6F1F2;
  --color-primary-10:rgba(31,111,122,.10);
  --color-primary-20:rgba(31,111,122,.20);
  --color-accent:#C08A46;
  --color-accent-light:#F3E7D6;
  --color-bg:#FAFAF7;
  --color-alt:#F3F5F4;
  --color-surface:#FFFFFF;
  --color-text:#16211F;
  --color-muted:#5A6B6B;
  --color-weak:#8A9896;
  --color-line:#E4E8E6;
  --color-success:#2F8F6B;
  --color-warn:#C25B3E;
  --color-footer:#123037;
  --radius-card:16px;
  --radius-img:13px;
  --radius-input:12px;
  --radius-pill:999px;
  --shadow-sm:0 1px 2px rgba(22,33,31,.05);
  --shadow-md:0 8px 24px -12px rgba(20,80,90,.18);
  --shadow-lg:0 24px 48px -24px rgba(20,80,90,.22);
  --space-1:8px;
  --space-2:16px;
  --space-3:24px;
  --space-4:32px;
  --space-5:48px;
  --space-6:64px;
  --ease:220ms cubic-bezier(.2,.7,.3,1);
  --nav-h:72px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--color-text);
  background:var(--color-bg);
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--color-primary);text-decoration:none;transition:color var(--ease);}
a:hover{color:var(--color-primary-dark);}
button{font-family:inherit;}
h1,h2,h3,h4,h5,h6{
  font-family:inherit;
  color:var(--color-text);
  margin:0 0 var(--space-2);
  line-height:1.3;
  letter-spacing:-.01em;
}
h1{font-size:clamp(2rem,4.2vw,3.25rem);font-weight:700;}
h2{font-size:clamp(1.5rem,2.6vw,2.125rem);font-weight:700;}
h3{font-size:1.1875rem;font-weight:600;}
h4{font-size:1rem;font-weight:600;}
p{margin:0 0 var(--space-2);}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px;border-radius:6px;}

/* ---------- Foundation 覆盖 ---------- */
.row{max-width:1200px;}
.row.full-bleed{max-width:none;}
.columns,.column{padding-left:12px;padding-right:12px;}
button,.button{
  background:var(--color-primary);
  color:#fff;
  border-radius:var(--radius-pill);
  font-size:1rem;
  padding:.75rem 1.6rem;
  border:0;
  transition:background var(--ease),box-shadow var(--ease),transform var(--ease),color var(--ease);
}
button:hover,.button:hover{background:var(--color-primary-dark);color:#fff;}
input,textarea,select{
  border-radius:var(--radius-input);
  border:1px solid var(--color-line);
  height:auto;
  font-family:inherit;
}
input:focus,textarea:focus,select:focus{
  border-color:var(--color-primary);
  box-shadow:0 0 0 4px var(--color-primary-10);
  outline:none;
}

/* ---------- 通用组件 ---------- */
.container-pad{padding-left:24px;padding-right:24px;}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:var(--radius-pill);
  font-size:1rem;
  font-weight:600;
  padding:14px 30px;
  border:1.5px solid transparent;
  cursor:pointer;
  transition:background var(--ease),border-color var(--ease),color var(--ease),box-shadow var(--ease),transform var(--ease);
  white-space:nowrap;
}
.btn i{font-size:.9em;}
.btn--primary{background:var(--color-primary);color:#fff;box-shadow:var(--shadow-md);}
.btn--primary:hover{background:var(--color-primary-dark);color:#fff;box-shadow:var(--shadow-lg);transform:translateY(-1px);}
.btn--outline{background:transparent;border-color:var(--color-primary);color:var(--color-primary);}
.btn--outline:hover{background:var(--color-primary-light);color:var(--color-primary-dark);}
.btn--ghost{background:rgba(255,255,255,.62);border-color:rgba(31,111,122,.45);color:var(--color-primary-dark);backdrop-filter:blur(6px);}
.btn--ghost:hover{background:#fff;border-color:var(--color-primary);color:var(--color-primary-dark);}
.btn--sm{padding:10px 20px;font-size:.9375rem;}
.btn--block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}

.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  background:var(--color-primary-light);
  color:var(--color-primary-dark);
  font-size:12px;
  font-weight:600;
  padding:4px 12px;
  border-radius:var(--radius-pill);
  letter-spacing:.02em;
}
.badge--accent{background:var(--color-accent-light);color:#8B5F27;}
.tag{
  display:inline-block;
  font-size:13px;
  color:var(--color-muted);
  background:var(--color-alt);
  border:1px solid var(--color-line);
  border-radius:var(--radius-pill);
  padding:4px 12px;
}
.eyebrow{
  font-size:13px;
  font-weight:600;
  letter-spacing:.14em;
  color:var(--color-accent);
  text-transform:uppercase;
  margin-bottom:var(--space-2);
}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}
.section{padding:96px 0;position:relative;}
.section--alt{background:var(--color-alt);}
.section-head{max-width:720px;margin-bottom:var(--space-5);}
.section-head p{color:var(--color-muted);font-size:1.0625rem;margin-bottom:0;}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center;}
.divider{height:1px;background:var(--color-line);border:0;margin:0;}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:120;
  background:rgba(255,255,255,.55);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid rgba(255,255,255,.68);
  box-shadow:0 6px 24px -18px rgba(20,80,90,.35);
  transition:background var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.95);
  border-bottom:1px solid var(--color-line);
  box-shadow:var(--shadow-md);
}
.nav-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:var(--nav-h);
  flex-wrap:nowrap;
}
.nav-brand-col,.nav-main-col{padding-top:0;padding-bottom:0;}
.nav-main-col{display:flex;align-items:center;justify-content:flex-end;gap:18px;flex:1;}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-weight:700;
  font-size:1.0625rem;
  color:var(--color-text);
  letter-spacing:-.01em;
}
.brand:hover{color:var(--color-primary-dark);}
.brand-mark{
  width:26px;height:26px;flex:0 0 26px;
  border-radius:8px;
  background:linear-gradient(140deg,var(--color-primary),#2C8E97 60%,var(--color-accent));
  position:relative;
  box-shadow:0 6px 14px -8px rgba(20,80,90,.6);
}
.brand-mark::after{
  content:"";
  position:absolute;
  inset:8px;
  border:1.5px solid rgba(255,255,255,.85);
  border-radius:2px;
}
.brand-text{white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:20px;flex-wrap:nowrap;}
.nav-links a{
  position:relative;
  font-size:.9375rem;
  font-weight:500;
  color:var(--color-text);
  padding:6px 0;
  white-space:nowrap;
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-2px;
  height:2px;
  border-radius:2px;
  background:var(--color-primary);
  transform:scaleX(0);
  transform-origin:center;
  transition:transform var(--ease);
}
.nav-links a:hover{color:var(--color-primary-dark);}
.nav-links a:hover::after,.nav-links a.is-active::after{transform:scaleX(1);}
.nav-links a.is-active{color:var(--color-primary-dark);font-weight:600;}
.nav-actions{display:flex;align-items:center;gap:10px;}
.nav-icon-btn{
  width:38px;height:38px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:var(--radius-pill);
  border:1px solid var(--color-line);
  background:rgba(255,255,255,.7);
  color:var(--color-muted);
  cursor:pointer;
  transition:background var(--ease),color var(--ease),border-color var(--ease);
}
.nav-icon-btn:hover{background:var(--color-primary-light);color:var(--color-primary-dark);border-color:var(--color-primary-20);}
.nav-toggle{display:none;}

/* 移动抽屉 */
.nav-drawer{
  position:fixed;
  inset:0;
  z-index:200;
  background:var(--color-surface);
  padding:24px 20px 40px;
  transform:translateX(100%);
  transition:transform 260ms cubic-bezier(.2,.7,.3,1);
  overflow-y:auto;
  visibility:hidden;
}
.nav-drawer.is-open{transform:translateX(0);visibility:visible;}
.nav-drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.nav-drawer-close{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--color-line);
  background:#fff;color:var(--color-text);cursor:pointer;font-size:1.1rem;
}
.nav-drawer a.dr-link{
  display:block;
  line-height:52px;
  font-size:1.0625rem;
  color:var(--color-text);
  border-bottom:1px solid var(--color-line);
}
.nav-drawer a.dr-link.is-active{color:var(--color-primary);font-weight:600;}
.nav-drawer .drawer-cta{margin-top:24px;}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  min-height:78vh;
  padding:calc(var(--nav-h) + 64px) 0 0;
  overflow:hidden;
  display:flex;
  flex-direction:column;
  justify-content:space-between;
}
.hero-bg{
  position:absolute inset:0;
  top:0;left:0;right:0;bottom:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  z-index:0;
}
.hero-overlay{
  position:absolute;top:0;left:0;right:0;bottom:0;
  background:linear-gradient(120deg,rgba(250,250,247,.92) 0%,rgba(250,250,247,.78) 52%,rgba(31,111,122,.14) 100%);
  z-index:1;
}
.hero .row{position:relative;z-index:2;}
.hero-row{display:flex;align-items:center;flex-wrap:wrap;padding-bottom:56px;}
.hero-copy{padding-right:32px;}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.08em;
  color:var(--color-primary-dark);
  background:rgba(255,255,255,.7);
  border:1px solid var(--color-primary-20);
  border-radius:var(--radius-pill);
  padding:6px 16px;
  margin-bottom:var(--space-3);
}
.hero h1{margin-bottom:var(--space-3);}
.hero-sub{
  font-size:1.125rem;
  color:var(--color-muted);
  line-height:1.8;
  max-width:34em;
  margin-bottom:var(--space-4);
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:var(--space-4);}
.hero-trust{
  display:flex;flex-wrap:wrap;gap:10px 28px;
  font-size:.9375rem;
  color:var(--color-muted);
}
.hero-trust li{display:flex;align-items:center;gap:8px;}
.hero-trust li::before{
  content:"";
  width:6px;height:6px;border-radius:50%;
  background:var(--color-accent);
  flex:0 0 6px;
}
.hero-visual{position:relative;padding:24px 12px 40px;}
.hero-img-card{
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-lg);
  border:1px solid rgba(255,255,255,.8);
  background:var(--color-primary-light);
  transform:translateX(18px);
}
.hero-img-card img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  background:var(--color-primary-light);
}
.hero-stat-card{
  position:absolute;
  left:-6px;
  bottom:0;
  background:#fff;
  border-radius:var(--radius-card);
  border:1px solid var(--color-line);
  box-shadow:var(--shadow-lg);
  padding:18px 22px;
  min-width:210px;
}
.hero-stat-card .stat-value{
  font-size:1.875rem;
  font-weight:700;
  color:var(--color-primary-dark);
  line-height:1.1;
}
.hero-stat-card .stat-label{
  font-size:13px;
  color:var(--color-muted);
  margin-top:4px;
}

/* 锚点胶囊条 */
.hero-anchors{
  position:relative;
  z-index:3;
  background:rgba(255,255,255,.82);
  backdrop-filter:blur(10px);
  border-top:1px solid rgba(228,232,230,.9);
  border-bottom:1px solid rgba(228,232,230,.9);
}
.anchor-row{
  display:flex;
  gap:10px;
  overflow-x:auto;
  padding:12px 0;
  scrollbar-width:none;
}
.anchor-row::-webkit-scrollbar{display:none;}
.anchor-row a{
  flex:0 0 auto;
  font-size:.9375rem;
  font-weight:500;
  color:var(--color-muted);
  border:1px solid var(--color-line);
  background:#fff;
  border-radius:var(--radius-pill);
  padding:8px 20px;
  transition:background var(--ease),color var(--ease),border-color var(--ease),transform var(--ease);
}
.anchor-row a:hover{background:var(--color-primary-light);color:var(--color-primary-dark);border-color:var(--color-primary-20);transform:translateY(-1px);}

/* ---------- 卖点 2+1 ---------- */
.adv-grid{display:flex;flex-wrap:wrap;margin-bottom:-24px;}
.adv-grid > [class*="column"]{margin-bottom:24px;}
.card{
  background:var(--color-surface);
  border:1px solid var(--color-line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-md);
  transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px);border-color:var(--color-primary-20);}
.adv-main{padding:0;overflow:hidden;display:flex;flex-direction:column;height:100%;}
.adv-main-media{
  aspect-ratio:16/7;
  background:var(--color-primary-light);
  overflow:hidden;
}
.adv-main-media img{width:100%;height:100%;object-fit:cover;}
.adv-main-body{padding:32px;flex:1;}
.adv-num{
  font-size:.875rem;
  font-weight:700;
  letter-spacing:.1em;
  color:var(--color-accent);
  margin-bottom:12px;
}
.adv-main h3{font-size:1.5rem;margin-bottom:14px;}
.adv-main p{color:var(--color-muted);margin-bottom:20px;}
.adv-points{display:flex;flex-wrap:wrap;gap:10px;}
.adv-points li{
  font-size:.875rem;
  color:var(--color-primary-dark);
  background:var(--color-primary-light);
  border-radius:var(--radius-pill);
  padding:6px 14px;
}
.adv-side{padding:28px;margin-bottom:24px;height:calc(50% - 24px);display:flex;flex-direction:column;justify-content:center;}
.adv-side:last-child{margin-bottom:0;}
.adv-side .icon-box{
  width:46px;height:46px;
  border-radius:14px;
  background:var(--color-accent-light);
  color:#8B5F27;
  display:flex;align-items:center;justify-content:center;
  font-size:1.1rem;
  margin-bottom:16px;
}
.adv-side h3{margin-bottom:10px;}
.adv-side p{color:var(--color-muted);font-size:.9375rem;margin-bottom:0;}

/* ---------- 演示 图文交替 ---------- */
.demo-item{display:flex;align-items:center;flex-wrap:wrap;gap:40px;margin-bottom:72px;}
.demo-item:last-child{margin-bottom:0;}
.demo-item.reverse{flex-direction:row-reverse;}
.demo-media,.demo-body{flex:1 1 460px;min-width:280px;}
.demo-media{
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-md);
  background:var(--color-primary-light);
}
.demo-media img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.demo-body h3{font-size:1.5rem;margin-bottom:14px;}
.demo-body p{color:var(--color-muted);}
.demo-list{margin:20px 0 26px;}
.demo-list li{
  position:relative;
  padding-left:26px;
  margin-bottom:10px;
  color:var(--color-text);
  font-size:.9375rem;
}
.demo-list li::before{
  content:"";
  position:absolute;
  left:0;top:.62em;
  width:10px;height:10px;
  border-radius:3px;
  background:var(--color-primary-light);
  border:1.5px solid var(--color-primary);
}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-weight:600;font-size:.9375rem;
  color:var(--color-primary);
}
.text-link:hover{gap:10px;color:var(--color-primary-dark);}

/* ---------- 证据 ---------- */
.proof-grid{display:flex;flex-wrap:wrap;margin-bottom:32px;}
.proof-grid > [class*="column"]{margin-bottom:24px;}
.proof-card{
  background:#fff;
  border:1px solid var(--color-line);
  border-radius:var(--radius-card);
  padding:26px 24px;
  height:100%;
  box-shadow:var(--shadow-sm);
  transition:box-shadow var(--ease),transform var(--ease);
}
.proof-card:hover{box-shadow:var(--shadow-md);transform:translateY(-4px);}
.proof-value{
  font-size:2.25rem;
  font-weight:700;
  color:var(--color-primary-dark);
  line-height:1;
  margin-bottom:10px;
}
.proof-value span{font-size:1rem;font-weight:600;color:var(--color-accent);margin-left:4px;}
.proof-label{font-size:.9375rem;color:var(--color-text);font-weight:600;margin-bottom:4px;}
.proof-note{font-size:13px;color:var(--color-weak);margin-bottom:0;}
.proof-band{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;
  background:var(--color-primary-light);
  border:1px solid var(--color-primary-10);
  border-radius:var(--radius-card);
  padding:24px 28px;
}
.proof-band p{margin:0;color:var(--color-primary-dark);font-size:.9375rem;}
.proof-band .band-tags{display:flex;flex-wrap:wrap;gap:10px;}
.proof-band .band-tags span{
  background:#fff;
  border:1px solid var(--color-primary-20);
  color:var(--color-primary-dark);
  border-radius:var(--radius-pill);
  font-size:13px;
  padding:5px 14px;
}

/* ---------- 价格 ---------- */
.price-grid{display:flex;flex-wrap:wrap;align-items:flex-start;margin-bottom:20px;}
.price-grid > [class*="column"]{margin-bottom:28px;}
.plan{
  background:#fff;
  border:1px solid var(--color-line);
  border-radius:var(--radius-card);
  padding:32px 28px;
  height:100%;
  display:flex;
  flex-direction:column;
  box-shadow:var(--shadow-sm);
  transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
.plan:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px);}
.plan--featured{
  border:2px solid var(--color-primary);
  box-shadow:var(--shadow-lg);
  transform:translateY(-12px);
  position:relative;
}
.plan--featured:hover{transform:translateY(-16px);}
.plan-flag{
  position:absolute;
  top:-13px;
  left:28px;
  background:var(--color-accent);
  color:#fff;
  font-size:12px;
  font-weight:600;
  border-radius:var(--radius-pill);
  padding:4px 14px;
  letter-spacing:.04em;
}
.plan-name{font-size:1.125rem;font-weight:600;margin-bottom:6px;}
.plan-desc{font-size:13px;color:var(--color-weak);margin-bottom:18px;}
.plan-price{
  font-size:1.875rem;
  font-weight:700;
  color:var(--color-primary-dark);
  line-height:1.2;
  margin-bottom:4px;
}
.plan-price small{font-size:.8125rem;font-weight:500;color:var(--color-weak);display:block;margin-top:6px;}
.plan-features{margin:22px 0 28px;flex:1;}
.plan-features li{
  position:relative;
  padding-left:26px;
  font-size:.9375rem;
  color:var(--color-muted);
  margin-bottom:12px;
}
.plan-features li::before{
  content:"\f00c";
  font-family:"Font Awesome 6 Free";
  font-weight:900;
  position:absolute;
  left:0;top:0;
  font-size:12px;
  color:var(--color-success);
}
.price-note{
  text-align:center;
  font-size:.875rem;
  color:var(--color-weak);
  margin-bottom:0;
}

/* ---------- 最新信息 ---------- */
.news-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  margin-bottom:var(--space-5);
  flex-wrap:wrap;
}
.news-head .section-head{margin-bottom:0;}
.news-grid{display:flex;flex-wrap:wrap;margin-bottom:-24px;}
.news-grid > [class*="column"]{margin-bottom:24px;}
.news-card{
  background:#fff;
  border:1px solid var(--color-line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-md);
  overflow:hidden;
  height:100%;
  display:flex;
  flex-direction:column;
  transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
.news-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px);border-color:var(--color-primary-20);}
.news-media{
  aspect-ratio:16/9;
  background:var(--color-primary-light);
  overflow:hidden;
}
.news-media img{width:100%;height:100%;object-fit:cover;transition:transform 420ms cubic-bezier(.2,.7,.3,1);}
.news-card:hover .news-media img{transform:scale(1.04);}
.news-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1;}
.news-title{
  font-size:1.0625rem;
  font-weight:600;
  line-height:1.5;
  margin-bottom:10px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  color:var(--color-text);
}
.news-card:hover .news-title{color:var(--color-primary);}
.news-summary{
  font-size:.9375rem;
  color:var(--color-muted);
  line-height:1.7;
  margin-bottom:18px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  flex:1;
}
.news-foot{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-top:16px;
  border-top:1px solid var(--color-line);
}
.news-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.news-time{font-size:13px;color:var(--color-weak);}
.news-more{
  width:34px;height:34px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:50%;
  background:var(--color-primary-light);
  color:var(--color-primary-dark);
  font-size:12px;
  transition:background var(--ease),color var(--ease),transform var(--ease);
  flex:0 0 34px;
}
.news-card:hover .news-more{background:var(--color-primary);color:#fff;transform:translateX(2px);}
.news-empty{
  text-align:center;
  padding:64px 24px;
  background:#fff;
  border:1px dashed var(--color-line);
  border-radius:var(--radius-card);
}
.news-empty i{font-size:2rem;color:var(--color-primary-20);margin-bottom:16px;display:block;}
.news-empty p{color:var(--color-muted);margin-bottom:20px;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:880px;margin:0 auto;}
.faq-item{border-bottom:1px solid var(--color-line);}
.faq-item:first-child{border-top:1px solid var(--color-line);}
.faq-q{
  width:100%;
  background:transparent;
  border:0;
  padding:22px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  text-align:left;
  font-size:1.0625rem;
  font-weight:600;
  color:var(--color-text);
  cursor:pointer;
  border-radius:0;
  transition:color var(--ease);
}
.faq-q:hover{color:var(--color-primary);}
.faq-q:hover,.faq-q:focus{background:transparent;}
.faq-icon{
  position:relative;
  width:22px;height:22px;flex:0 0 22px;
  border-radius:50%;
  border:1.5px solid var(--color-primary-20);
  transition:transform var(--ease),background var(--ease),border-color var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  background:var(--color-primary);
  border-radius:2px;
  transition:opacity var(--ease),background var(--ease);
}
.faq-icon::before{top:50%;left:5px;right:5px;height:1.5px;transform:translateY(-50%);}
.faq-icon::after{left:50%;top:5px;bottom:5px;width:1.5px;transform:translateX(-50%);}
.faq-item.is-open .faq-icon{transform:rotate(180deg);background:var(--color-primary);border-color:var(--color-primary);}
.faq-item.is-open .faq-icon::before,.faq-item.is-open .faq-icon::after{background:#fff;}
.faq-item.is-open .faq-icon::after{opacity:0;}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height 300ms cubic-bezier(.2,.7,.3,1);
}
.faq-a-inner{padding:0 40px 24px 0;}
.faq-a-inner p{
  font-size:.9375rem;
  line-height:1.8;
  color:var(--color-muted);
  margin-bottom:0;
}

/* ---------- 尾部 CTA ---------- */
.cta-band{
  background:linear-gradient(120deg,rgba(31,111,122,.10),rgba(31,111,122,.02) 60%,rgba(192,138,70,.10));
  border-top:1px solid var(--color-line);
  border-bottom:1px solid var(--color-line);
  padding:64px 0;
}
.cta-band-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(1.375rem,2.2vw,1.75rem);margin-bottom:6px;}
.cta-band p{margin-bottom:0;color:var(--color-muted);}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--color-footer);
  color:rgba(255,255,255,.72);
  padding:72px 0 0;
  position:relative;
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-60px;right:-60px;
  width:340px;height:340px;
  background:
    repeating-linear-gradient(90deg,rgba(255,255,255,.05) 0 1px,transparent 1px 22px),
    repeating-linear-gradient(0deg,rgba(255,255,255,.05) 0 1px,transparent 1px 22px);
  opacity:.6;
  pointer-events:none;
}
.footer-grid{display:flex;flex-wrap:wrap;position:relative;z-index:1;margin-bottom:-28px;}
.footer-grid > [class*="column"]{margin-bottom:28px;}
.footer-brand{
  display:inline-flex;align-items:center;gap:10px;
  color:#fff;font-weight:700;font-size:1.0625rem;
  margin-bottom:16px;
}
.footer-brand:hover{color:#fff;}
.footer-brand .brand-mark{box-shadow:none;}
.site-footer p{font-size:.9375rem;line-height:1.8;color:rgba(255,255,255,.68);}
.site-footer h4{
  color:#fff;
  font-size:.9375rem;
  letter-spacing:.06em;
  margin-bottom:18px;
  text-transform:none;
}
.footer-links li{margin-bottom:11px;}
.footer-links a{
  color:rgba(255,255,255,.68);
  font-size:.9375rem;
  transition:color var(--ease),padding-left var(--ease);
}
.footer-links a:hover{color:#fff;padding-left:4px;}
.footer-contact li{
  display:flex;
  gap:10px;
  font-size:.9375rem;
  color:rgba(255,255,255,.68);
  margin-bottom:12px;
  line-height:1.7;
}
.footer-contact i{color:var(--color-accent);margin-top:.3em;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0;
  margin-top:32px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:rgba(255,255,255,.55);
  position:relative;
  z-index:1;
}
.footer-bottom a{color:rgba(255,255,255,.7);}
.footer-bottom a:hover{color:#fff;}

/* ---------- 浮动 CTA / 回到顶部 ---------- */
.float-cta{
  position:fixed;
  right:24px;
  bottom:24px;
  z-index:150;
  display:inline-flex;
  align-items:center;
  gap:10px;
  background:var(--color-primary);
  color:#fff;
  font-size:.9375rem;
  font-weight:600;
  padding:14px 24px;
  border-radius:var(--radius-pill);
  box-shadow:var(--shadow-lg);
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity var(--ease),transform var(--ease),background var(--ease),visibility var(--ease);
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta:hover{background:var(--color-primary-dark);color:#fff;}
.to-top{
  position:fixed;
  right:24px;
  bottom:88px;
  z-index:140;
  width:44px;height:44px;
  border-radius:50%;
  border:1px solid var(--color-line);
  background:#fff;
  color:var(--color-primary);
  display:none;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  box-shadow:var(--shadow-md);
  transition:background var(--ease),color var(--ease),transform var(--ease);
}
.to-top:hover{background:var(--color-primary);color:#fff;transform:translateY(-2px);}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1199px){
  .nav-links{gap:14px;}
  .nav-links a{font-size:.875rem;}
}
@media screen and (max-width:1023px){
  .nav-links{display:none;}
  .nav-toggle{
    display:inline-flex;
    width:40px;height:40px;
    align-items:center;justify-content:center;
    border-radius:var(--radius-pill);
    border:1px solid var(--color-line);
    background:rgba(255,255,255,.75);
    color:var(--color-text);
    cursor:pointer;
  }
  .nav-actions .btn{display:none;}
  .section{padding:80px 0;}
  .hero-copy{padding-right:12px;}
  .hero-img-card{transform:none;}
  .hero-visual{padding-bottom:56px;}
  .adv-side{height:auto;}
  .plan--featured{transform:none;}
  .plan--featured:hover{transform:translateY(-4px);}
  .demo-item{gap:28px;margin-bottom:56px;}
  .to-top{display:none !important;}
}
@media screen and (max-width:639px){
  body{padding-bottom:72px;}
  .section{padding:64px 0;}
  .section-head{margin-bottom:32px;}
  .hero{padding-top:calc(var(--nav-h) + 40px);min-height:auto;}
  .hero h1{font-size:1.75rem;}
  .hero-sub{font-size:1rem;}
  .hero-cta{gap:10px;}
  .hero-cta .btn{flex:1 1 100%;}
  .hero-stat-card{position:static;margin-top:16px;min-width:0;}
  .hero-img-card img{aspect-ratio:4/3;}
  .adv-main-body{padding:24px;}
  .adv-main h3{font-size:1.25rem;}
  .demo-body h3{font-size:1.25rem;}
  .news-head{align-items:flex-start;}
  .price-grid > [class*="column"]{margin-bottom:20px;}
  .cta-band{padding:48px 0;}
  .cta-band-inner .btn{width:100%;}
  .float-cta{
    left:0;right:0;bottom:0;
    width:100%;
    border-radius:0;
    justify-content:center;
    padding:16px 20px;
    height:56px;
    box-shadow:0 -6px 20px -12px rgba(20,80,90,.5);
  }
  .footer-bottom{font-size:12px;}
}
@media screen and (max-width:360px){
  .container-pad{padding-left:20px;padding-right:20px;}
  .hero h1{font-size:1.6rem;}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .card:hover,.news-card:hover,.proof-card:hover,.plan:hover,.btn:hover,.anchor-row a:hover,.news-card:hover .news-media img{transform:none !important;}
}

/* roulang page: category1 */
:root{
  --color-primary:#1F6F7A;
  --color-primary-dark:#14515C;
  --color-primary-light:#E6F1F2;
  --color-primary-soft:rgba(31,111,122,.10);
  --color-accent:#C08A46;
  --color-accent-light:#F3E7D6;
  --color-bg:#FAFAF7;
  --color-surface:#FFFFFF;
  --color-surface-alt:#F3F5F4;
  --color-text:#16211F;
  --color-text-muted:#5A6B6B;
  --color-text-weak:#8A9896;
  --color-border:#E4E8E6;
  --color-footer:#123037;
  --radius-card:16px;
  --radius-img:13px;
  --radius-input:12px;
  --radius-pill:999px;
  --shadow-sm:0 1px 2px rgba(22,33,31,.05);
  --shadow-md:0 8px 24px -12px rgba(20,80,90,.18);
  --shadow-lg:0 24px 48px -24px rgba(20,80,90,.22);
  --space-1:8px;
  --space-2:16px;
  --space-3:24px;
  --space-4:32px;
  --space-5:48px;
  --space-6:64px;
  --container:1200px;
  --ease:cubic-bezier(.2,.7,.3,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--color-bg);
  color:var(--color-text);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--color-primary);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--color-primary-dark);}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px;border-radius:4px;}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;font-weight:600;letter-spacing:-.01em;color:var(--color-text);line-height:1.3;}
h1{font-size:clamp(2rem,4.2vw,3.25rem);}
h2{font-size:clamp(1.5rem,2.6vw,2.125rem);}
h3{font-size:1.125rem;font-weight:600;}
h4{font-size:.9375rem;font-weight:600;letter-spacing:0;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
.num{font-variant-numeric:tabular-nums;}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
.row{max-width:var(--container);}
.row::before,.row::after{content:"";display:table;}
.row::after{clear:both;}
.columns{padding-left:0;padding-right:0;}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:80;
  background:rgba(255,255,255,.14);
  border-bottom:1px solid rgba(255,255,255,.30);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:0 2px 18px -10px rgba(20,80,90,.28);
  transition:background .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.96);
  border-bottom-color:var(--color-border);
  box-shadow:var(--shadow-md);
}
.nav-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:72px;
  max-width:var(--container);
  padding:0 24px;
  flex-wrap:nowrap;
}
.nav-brand-col,.nav-main-col{padding:0;float:none;}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:1.0625rem;
  font-weight:700;
  color:var(--color-text);
  letter-spacing:.01em;
  white-space:nowrap;
}
.brand:hover{color:var(--color-primary-dark);}
.brand-mark{
  width:26px;height:26px;
  border-radius:8px;
  background:linear-gradient(140deg,var(--color-primary) 0%,var(--color-primary-dark) 62%,var(--color-accent) 100%);
  box-shadow:0 4px 12px -6px rgba(20,80,90,.65);
  flex:none;
  position:relative;
}
.brand-mark::after{
  content:"";
  position:absolute;inset:7px 7px auto 7px;
  height:2px;border-radius:2px;
  background:rgba(255,255,255,.85);
  box-shadow:0 5px 0 rgba(255,255,255,.55),0 10px 0 rgba(255,255,255,.3);
}
.nav-main-col{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:var(--space-3);
  flex:1;
  min-width:0;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:22px;
  white-space:nowrap;
}
.nav-links a{
  position:relative;
  font-size:.9375rem;
  color:var(--color-text);
  padding:6px 0;
  transition:color .2s var(--ease);
}
.nav-links a::after{
  content:"";
  position:absolute;left:0;right:0;bottom:-2px;
  height:2px;border-radius:2px;
  background:var(--color-primary);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s var(--ease);
}
.nav-links a:hover{color:var(--color-primary);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.is-active{color:var(--color-primary);font-weight:600;}
.nav-links a.is-active::after{transform:scaleX(1);}
.nav-actions{display:flex;align-items:center;gap:12px;}
.nav-icon-btn{
  width:38px;height:38px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(22,33,31,.14);
  background:rgba(255,255,255,.5);
  color:var(--color-text);
  cursor:pointer;
  display:inline-flex;align-items:center;justify-content:center;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.nav-icon-btn:hover{background:var(--color-primary-light);color:var(--color-primary-dark);border-color:rgba(31,111,122,.35);}
.nav-toggle{
  display:none;
  width:40px;height:40px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(22,33,31,.14);
  background:rgba(255,255,255,.6);
  color:var(--color-text);
  cursor:pointer;
  align-items:center;justify-content:center;
}
.nav-toggle:hover{background:var(--color-primary-light);color:var(--color-primary-dark);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 26px;
  border-radius:var(--radius-pill);
  font-size:.9375rem;
  font-weight:600;
  line-height:1.2;
  border:1.5px solid transparent;
  cursor:pointer;
  transition:transform .22s var(--ease),background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.btn--sm{padding:9px 18px;font-size:.875rem;}
.btn--primary{background:var(--color-primary);color:#fff;box-shadow:var(--shadow-sm);}
.btn--primary:hover{background:var(--color-primary-dark);color:#fff;box-shadow:var(--shadow-lg);transform:translateY(-1px);}
.btn--primary:active{transform:translateY(0);}
.btn--outline{background:transparent;border-color:var(--color-primary);color:var(--color-primary);}
.btn--outline:hover{background:var(--color-primary-light);color:var(--color-primary-dark);transform:translateY(-1px);}
.btn--ghost{background:rgba(255,255,255,.55);border-color:rgba(22,33,31,.18);color:var(--color-text);}
.btn--ghost:hover{background:#fff;border-color:var(--color-primary);color:var(--color-primary-dark);transform:translateY(-1px);}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}

/* ---------- 通用徽章 / 标签 ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 12px;
  border-radius:var(--radius-pill);
  background:var(--color-primary-light);
  color:var(--color-primary-dark);
  font-size:12px;
  font-weight:600;
  letter-spacing:.02em;
}
.badge--accent{background:var(--color-accent-light);color:#8A5F27;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--color-primary);font-weight:600;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--color-accent);border-radius:2px;}

/* ---------- 分类 Hero ---------- */
.cat-hero{
  position:relative;
  overflow:hidden;
  padding:140px 0 64px;
  background:var(--color-surface-alt) url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  border-bottom:1px solid var(--color-border);
}
.cat-hero::before{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(255,255,255,.94) 0%,rgba(255,255,255,.88) 55%,rgba(230,241,242,.90) 100%);
}
.cat-hero::after{
  content:"";
  position:absolute;inset:0;
  background-image:radial-gradient(circle at 18% 24%,rgba(31,111,122,.07) 0 2px,transparent 2px),
                   radial-gradient(circle at 76% 68%,rgba(192,138,70,.07) 0 2px,transparent 2px);
  background-size:46px 46px,64px 64px;
  opacity:.7;
  pointer-events:none;
}
.cat-hero .container{position:relative;z-index:2;}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--color-text-muted);margin-bottom:20px;
}
.breadcrumb a{color:var(--color-text-muted);}
.breadcrumb a:hover{color:var(--color-primary);}
.breadcrumb .sep{color:var(--color-text-weak);}
.breadcrumb .current{color:var(--color-primary);font-weight:600;}
.cat-hero-inner{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:var(--space-5);align-items:center;}
.cat-hero h1{max-width:16em;}
.cat-hero .lead{
  margin-top:18px;
  max-width:34em;
  font-size:1.0625rem;
  color:var(--color-text-muted);
  line-height:1.85;
}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;
  border-radius:var(--radius-pill);
  background:rgba(255,255,255,.78);
  border:1px solid rgba(31,111,122,.18);
  font-size:13px;color:var(--color-primary-dark);
}
.chip i{color:var(--color-accent);font-size:12px;}
.cat-hero-figure{
  position:relative;
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-lg);
  border:1px solid rgba(255,255,255,.7);
  background:var(--color-primary-light);
  aspect-ratio:16/11;
}
.cat-hero-figure img{width:100%;height:100%;object-fit:cover;}
.cat-hero-figure figcaption{
  position:absolute;left:16px;bottom:16px;right:16px;
  background:rgba(18,48,55,.72);
  backdrop-filter:blur(6px);
  color:#fff;
  font-size:12.5px;
  border-radius:10px;
  padding:8px 12px;
  line-height:1.5;
}

/* ---------- 板块通用 ---------- */
.section{padding:96px 0;}
.section--alt{background:var(--color-surface-alt);}
.section--tight{padding:72px 0;}
.section-head{max-width:720px;margin-bottom:var(--space-5);}
.section-head h2{margin-bottom:14px;}
.section-head p{color:var(--color-text-muted);font-size:1rem;}

/* ---------- 图文交替长条 ---------- */
.feature-list{display:flex;flex-direction:column;}
.feature-row{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:var(--space-5);
  align-items:center;
  padding:var(--space-5) 0;
  border-bottom:1px solid var(--color-border);
}
.feature-row:first-child{padding-top:0;}
.feature-row:last-child{border-bottom:none;padding-bottom:0;}
.feature-row.is-reversed .feature-media{order:2;}
.feature-media{
  position:relative;
  border-radius:var(--radius-card);
  overflow:hidden;
  background:var(--color-primary-light);
  box-shadow:var(--shadow-md);
  border:1px solid var(--color-border);
  aspect-ratio:16/10;
  transition:box-shadow .25s var(--ease),transform .25s var(--ease);
}
.feature-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.feature-row:hover .feature-media{box-shadow:var(--shadow-lg);transform:translateY(-4px);}
.feature-row:hover .feature-media img{transform:scale(1.03);}
.feature-body .step-no{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:12px;
  background:var(--color-primary-light);
  color:var(--color-primary-dark);
  font-weight:700;font-size:.9375rem;
  font-variant-numeric:tabular-nums;
  margin-bottom:16px;
}
.feature-body h3{font-size:1.3125rem;margin-bottom:12px;}
.feature-body p{color:var(--color-text-muted);margin-bottom:16px;}
.tick-list{display:grid;gap:10px;}
.tick-list li{
  position:relative;
  padding-left:26px;
  font-size:.9375rem;
  color:var(--color-text-muted);
  line-height:1.7;
}
.tick-list li::before{
  content:"";
  position:absolute;left:0;top:.62em;
  width:14px;height:14px;border-radius:50%;
  background:var(--color-primary-light);
  border:1.5px solid rgba(31,111,122,.5);
}
.tick-list li::after{
  content:"";
  position:absolute;left:4.5px;top:calc(.62em + 4px);
  width:5px;height:2px;
  border-left:1.5px solid var(--color-primary);
  border-bottom:1.5px solid var(--color-primary);
  transform:rotate(-45deg);
}

/* ---------- 指标条 ---------- */
.metric-strip{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:1px;
  background:var(--color-border);
  border:1px solid var(--color-border);
  border-radius:var(--radius-card);
  overflow:hidden;
  margin-top:var(--space-5);
}
.metric-cell{
  background:var(--color-surface);
  padding:26px 24px;
  transition:background .22s var(--ease);
}
.metric-cell:hover{background:var(--color-primary-light);}
.metric-cell .num{
  display:block;
  font-size:clamp(1.75rem,3vw,2.25rem);
  font-weight:700;
  color:var(--color-primary-dark);
  line-height:1.15;
}
.metric-cell .num em{font-style:normal;font-size:.5em;color:var(--color-accent);margin-left:2px;}
.metric-cell span.label{display:block;margin-top:6px;font-size:13px;color:var(--color-text-muted);}

/* ---------- 能力卡 ---------- */
.cap-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:var(--space-3);
}
.cap-card{
  background:var(--color-surface);
  border:1px solid var(--color-border);
  border-radius:var(--radius-card);
  padding:28px 24px;
  box-shadow:var(--shadow-md);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.cap-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(31,111,122,.28);}
.cap-card i{color:var(--color-primary);font-size:20px;margin-bottom:14px;display:block;}
.cap-card h3{font-size:1.0625rem;margin-bottom:10px;}
.cap-card p{font-size:.9375rem;color:var(--color-text-muted);margin:0;}

/* ---------- 交叉链接 ---------- */
.cross-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:var(--space-3);
}
.cross-card{
  display:flex;
  flex-direction:column;
  gap:12px;
  background:var(--color-surface);
  border:1px solid var(--color-border);
  border-radius:var(--radius-card);
  padding:26px 24px;
  box-shadow:var(--shadow-sm);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.cross-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(31,111,122,.3);}
.cross-card h3{font-size:1.0625rem;color:var(--color-text);}
.cross-card:hover h3{color:var(--color-primary);}
.cross-card p{font-size:.9375rem;color:var(--color-text-muted);margin:0;}
.cross-card .go{
  margin-top:auto;
  font-size:.875rem;
  font-weight:600;
  color:var(--color-primary);
  display:inline-flex;align-items:center;gap:6px;
}
.cross-card .go i{font-size:12px;transition:transform .22s var(--ease);}
.cross-card:hover .go i{transform:translateX(4px);}

/* ---------- CTA 带 ---------- */
.cta-band{
  background:linear-gradient(135deg,rgba(31,111,122,.10) 0%,rgba(230,241,242,.85) 48%,rgba(243,231,214,.7) 100%);
  border-top:1px solid var(--color-border);
  border-bottom:1px solid var(--color-border);
  padding:64px 0;
}
.cta-band-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:var(--space-4);
  flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(1.375rem,2.2vw,1.75rem);margin-bottom:8px;}
.cta-band p{color:var(--color-text-muted);margin:0;max-width:46em;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--color-footer);
  color:rgba(255,255,255,.78);
  padding:64px 0 0;
  font-size:.9375rem;
}
.site-footer h4{
  color:#fff;
  font-size:.9375rem;
  margin-bottom:18px;
  letter-spacing:.02em;
}
.footer-grid{display:flex;flex-wrap:wrap;gap:0;}
.footer-brand{
  display:inline-flex;align-items:center;gap:10px;
  color:#fff;font-weight:700;font-size:1.0625rem;margin-bottom:16px;
}
.footer-brand:hover{color:#fff;}
.site-footer p{color:rgba(255,255,255,.62);line-height:1.85;max-width:30em;margin:0;}
.footer-links{display:grid;gap:10px;}
.footer-links a{color:rgba(255,255,255,.72);}
.footer-links a:hover{color:#fff;}
.footer-contact{display:grid;gap:12px;}
.footer-contact li{display:flex;align-items:flex-start;gap:10px;color:rgba(255,255,255,.72);}
.footer-contact i{color:var(--color-accent);margin-top:5px;font-size:13px;}
.footer-bottom{
  margin-top:48px;
  padding:22px 0;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.52);
}

/* ---------- 浮动 CTA / 回到顶部 ---------- */
.float-cta{
  position:fixed;
  right:24px;bottom:24px;
  z-index:70;
  display:inline-flex;align-items:center;gap:10px;
  padding:12px 22px;
  border-radius:var(--radius-pill);
  background:var(--color-primary);
  color:#fff;
  font-weight:600;
  font-size:.9375rem;
  box-shadow:var(--shadow-lg);
  opacity:0;
  transform:translateY(12px);
  pointer-events:none;
  transition:opacity .28s var(--ease),transform .28s var(--ease),background .22s var(--ease);
}
.float-cta.is-visible{opacity:1;transform:translateY(0);pointer-events:auto;}
.float-cta:hover{background:var(--color-primary-dark);color:#fff;}
.to-top{
  position:fixed;
  right:24px;bottom:88px;
  z-index:69;
  width:44px;height:44px;
  border-radius:50%;
  border:1px solid var(--color-border);
  background:#fff;
  color:var(--color-primary-dark);
  display:none;align-items:center;justify-content:center;
  box-shadow:var(--shadow-md);
  cursor:pointer;
  transition:transform .22s var(--ease),background .22s var(--ease);
}
.to-top:hover{background:var(--color-primary-light);transform:translateY(-2px);}

/* ---------- 移动抽屉 ---------- */
.mobile-drawer{
  position:fixed;
  inset:0;
  z-index:90;
  background:#fff;
  padding:88px 24px 32px;
  display:none;
  flex-direction:column;
  gap:2px;
  overflow-y:auto;
}
.mobile-drawer.is-open{display:flex;}
.mobile-drawer a{
  display:flex;
  align-items:center;
  min-height:52px;
  border-bottom:1px solid var(--color-border);
  color:var(--color-text);
  font-size:1rem;
}
.mobile-drawer a.is-active{color:var(--color-primary);font-weight:600;}
.mobile-drawer .drawer-cta{
  margin-top:24px;
  justify-content:center;
  min-height:48px;
  border-bottom:none;
}
.drawer-close{
  position:absolute;
  top:18px;right:20px;
  width:44px;height:44px;
  border-radius:50%;
  border:1px solid var(--color-border);
  background:#fff;
  color:var(--color-text);
  font-size:18px;
  cursor:pointer;
}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1200px){
  .nav-links{gap:16px;}
  .nav-links a{font-size:.875rem;}
}
@media screen and (max-width:1023px){
  .navbar{display:none;}
  .nav-links{display:none;}
  .nav-toggle{display:inline-flex;}
  .cat-hero{padding:124px 0 56px;}
  .cat-hero-inner{grid-template-columns:1fr;gap:var(--space-4);}
  .cat-hero h1{max-width:none;}
  .section{padding:80px 0;}
  .feature-row{grid-template-columns:1fr;gap:var(--space-3);}
  .feature-row.is-reversed .feature-media{order:0;}
  .metric-strip{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cap-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cross-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .to-top{display:none !important;}
}
@media screen and (max-width:639px){
  body{padding-bottom:56px;}
  .nav-row{min-height:64px;padding:0 20px;}
  .brand{font-size:.9375rem;}
  .brand-mark{width:22px;height:22px;}
  .nav-actions .btn{display:none;}
  .container{padding:0 20px;}
  .section{padding:64px 0;}
  .section--tight{padding:56px 0;}
  .cat-hero{padding:112px 0 48px;}
  .cat-hero .lead{font-size:1rem;}
  .metric-strip{grid-template-columns:1fr;}
  .cap-grid{grid-template-columns:1fr;}
  .cross-grid{grid-template-columns:1fr;}
  .cta-band{padding:56px 0;}
  .cta-band-inner{flex-direction:column;align-items:flex-start;}
  .float-cta{
    right:0;left:0;bottom:0;
    width:100%;
    height:56px;
    justify-content:center;
    border-radius:0;
    padding:0 20px;
    transform:translateY(100%);
    box-shadow:0 -6px 20px -10px rgba(20,80,90,.4);
  }
  .float-cta.is-visible{transform:translateY(0);}
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .feature-row:hover .feature-media,
  .cap-card:hover,
  .cross-card:hover{transform:none;}
}

/* roulang page: article */
:root{
  --color-primary:#1F6F7A;
  --color-primary-dark:#14515C;
  --color-primary-soft:#E6F1F2;
  --color-primary-10:rgba(31,111,122,.10);
  --color-accent:#C08A46;
  --color-accent-soft:#F3E7D6;
  --color-bg:#FAFAF7;
  --color-surface:#FFFFFF;
  --color-surface-alt:#F3F5F4;
  --color-text:#16211F;
  --color-text-muted:#5A6B6B;
  --color-text-faint:#8A9896;
  --color-border:#E4E8E6;
  --color-success:#2F8F6B;
  --color-warn:#C25B3E;
  --radius-card:16px;
  --radius-img:13px;
  --radius-input:12px;
  --radius-pill:999px;
  --shadow-sm:0 1px 2px rgba(22,33,31,.05);
  --shadow-md:0 8px 24px -12px rgba(20,80,90,.18);
  --shadow-lg:0 24px 48px -24px rgba(20,80,90,.22);
  --container:1200px;
  --ease:cubic-bezier(.2,.7,.3,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16.5px;
  line-height:1.75;
  color:var(--color-text);
  background:var(--color-bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--color-primary);text-decoration:none;transition:color .22s var(--ease);}
a:hover{color:var(--color-primary-dark);}
button{font:inherit;cursor:pointer;}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.3;letter-spacing:-.01em;color:var(--color-text);}
p{margin:0 0 1em;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px;border-radius:4px;}

/* ---------- 布局容器 ---------- */
.row{
  max-width:var(--container);
  margin-left:auto;
  margin-right:auto;
  padding-left:24px;
  padding-right:24px;
}
.row .row{padding-left:0;padding-right:0;}
.column,.columns{padding-left:0;padding-right:0;float:none;}
.container{
  max-width:var(--container);
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
@media (max-width:640px){
  .row,.container{padding-left:20px;padding-right:20px;}
}

/* ---------- 通用按钮 / 徽章 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 28px;
  border:1.5px solid transparent;
  border-radius:var(--radius-pill);
  font-size:.9375rem;
  font-weight:600;
  line-height:1;
  cursor:pointer;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.btn--primary{background:var(--color-primary);color:#fff;box-shadow:var(--shadow-md);}
.btn--primary:hover{background:var(--color-primary-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-lg);}
.btn--primary:active{transform:translateY(0);}
.btn--ghost{background:rgba(255,255,255,.6);color:var(--color-primary);border-color:rgba(31,111,122,.35);backdrop-filter:blur(6px);}
.btn--ghost:hover{background:#fff;color:var(--color-primary-dark);border-color:var(--color-primary);}
.btn--outline{background:transparent;color:var(--color-primary);border-color:var(--color-primary);}
.btn--outline:hover{background:var(--color-primary-soft);color:var(--color-primary-dark);}
.btn--sm{padding:10px 20px;font-size:.875rem;}
.btn[disabled],.btn:disabled{opacity:.45;pointer-events:none;}

.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 12px;
  border-radius:var(--radius-pill);
  background:var(--color-primary-soft);
  color:var(--color-primary);
  font-size:.75rem;
  font-weight:600;
  letter-spacing:.02em;
  line-height:1.6;
}
.badge--accent{background:var(--color-accent-soft);color:#8A5F26;}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:60;
  background:rgba(255,255,255,.62);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid rgba(255,255,255,.65);
  box-shadow:var(--shadow-sm);
  transition:background .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.96);
  border-bottom-color:var(--color-border);
  box-shadow:var(--shadow-md);
}
.nav-row{display:flex;align-items:center;justify-content:space-between;height:72px;}
.nav-row > .columns{width:auto;}
.nav-brand-col{flex:0 0 auto;}
.nav-main-col{flex:1 1 auto;display:flex;align-items:center;justify-content:flex-end;gap:14px;min-width:0;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--color-text);}
.brand:hover{color:var(--color-primary-dark);}
.brand-mark{
  position:relative;
  width:24px;height:24px;flex:0 0 24px;
  border-radius:8px;
  background:linear-gradient(140deg,var(--color-primary) 0%,var(--color-primary-dark) 100%);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.28);
}
.brand-mark::before{
  content:"";
  position:absolute;inset:6px;
  border:1.5px solid rgba(255,255,255,.92);
  border-radius:3px;
  border-bottom-color:transparent;
  border-right-color:transparent;
  transform:rotate(45deg);
}
.brand-text{font-size:1.0625rem;font-weight:700;letter-spacing:.01em;white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:2px;flex-wrap:nowrap;}
.nav-links a{
  position:relative;
  display:inline-block;
  padding:9px 10px;
  border-radius:8px;
  font-size:.9375rem;
  color:var(--color-text-muted);
  white-space:nowrap;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-links a:hover{color:var(--color-primary);background:var(--color-primary-soft);}
.nav-links a.is-active{color:var(--color-primary);font-weight:600;}
.nav-links a.is-active::after{
  content:"";
  position:absolute;
  left:10px;right:10px;bottom:3px;
  height:2px;border-radius:2px;
  background:var(--color-primary);
}
.nav-actions{display:flex;align-items:center;gap:10px;}
.nav-icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;
  border:1px solid var(--color-border);
  border-radius:50%;
  background:rgba(255,255,255,.7);
  color:var(--color-text-muted);
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.nav-icon-btn:hover{color:var(--color-primary);border-color:var(--color-primary);background:#fff;}
.nav-toggle{
  display:none;
  align-items:center;justify-content:center;
  width:40px;height:40px;
  border:1px solid var(--color-border);
  border-radius:12px;
  background:#fff;
  color:var(--color-text);
}
.nav-toggle:hover{color:var(--color-primary);border-color:var(--color-primary);}

/* 移动端抽屉 */
.nav-drawer{
  position:fixed;
  inset:0;
  z-index:90;
  padding:92px 24px 40px;
  background:rgba(250,250,247,.98);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  transform:translateY(-100%);
  transition:transform .32s var(--ease);
  overflow-y:auto;
  visibility:hidden;
}
.nav-drawer.is-open{transform:translateY(0);visibility:visible;}
.nav-drawer a{
  display:block;
  line-height:54px;
  font-size:1.0625rem;
  color:var(--color-text);
  border-bottom:1px solid var(--color-border);
}
.nav-drawer a:hover{color:var(--color-primary);}
.drawer-close{
  position:absolute;
  top:20px;right:24px;
  width:40px;height:40px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--color-border);
  border-radius:50%;
  background:#fff;
  color:var(--color-text);
}
.drawer-cta{margin-top:26px;}
.drawer-cta .btn{width:100%;}

/* ---------- 文章头部 ---------- */
.article-hero{
  position:relative;
  padding:132px 0 48px;
  background:var(--color-surface-alt);
  border-bottom:1px solid var(--color-border);
  overflow:hidden;
}
.article-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  opacity:.16;
}
.article-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(255,255,255,.66) 0%,rgba(230,241,242,.82) 100%);
}
.article-hero > .container{position:relative;z-index:2;}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:.8125rem;
  color:var(--color-text-muted);
  margin-bottom:18px;
}
.breadcrumb a{color:var(--color-text-muted);}
.breadcrumb a:hover{color:var(--color-primary);}
.breadcrumb .sep{color:var(--color-text-faint);}
.breadcrumb .current{color:var(--color-primary);}
.article-title{
  font-size:clamp(1.625rem,3.4vw,2.5rem);
  line-height:1.26;
  letter-spacing:-.015em;
  margin:14px 0 18px;
  max-width:900px;
}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 18px;
  font-size:.8125rem;
  color:var(--color-text-muted);
}
.article-meta i{color:var(--color-accent);margin-right:6px;}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--color-border);}

/* ---------- 正文区 ---------- */
.article-main{padding:56px 0 24px;}
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,780px) 240px;
  gap:64px;
  justify-content:center;
  align-items:start;
}
.article-body{min-width:0;}
.article-content{
  font-size:17px;
  line-height:1.9;
  color:#22302E;
  word-break:break-word;
}
.article-content > *:first-child{margin-top:0;}
.article-content p{margin:0 0 1.2em;}
.article-content h2{
  position:relative;
  margin:2.4em 0 1em;
  padding-left:14px;
  font-size:clamp(1.25rem,2.1vw,1.5rem);
  line-height:1.42;
  scroll-margin-top:104px;
}
.article-content h2::before{
  content:"";
  position:absolute;
  left:0;top:.26em;bottom:.26em;
  width:3px;border-radius:3px;
  background:var(--color-primary);
}
.article-content h3{
  position:relative;
  margin:1.9em 0 .8em;
  padding-left:12px;
  font-size:1.125rem;
  line-height:1.5;
  scroll-margin-top:104px;
}
.article-content h3::before{
  content:"";
  position:absolute;
  left:0;top:.3em;bottom:.3em;
  width:3px;border-radius:3px;
  background:var(--color-accent);
}
.article-content h4{margin:1.6em 0 .6em;font-size:1rem;color:var(--color-primary-dark);}
.article-content ul{list-style:none;margin:0 0 1.3em;padding-left:18px;}
.article-content ul li{position:relative;margin:0 0 .6em;}
.article-content ul li::before{
  content:"";
  position:absolute;
  left:-16px;top:.72em;
  width:6px;height:6px;border-radius:50%;
  background:var(--color-primary);
  opacity:.72;
}
.article-content ol{list-style:decimal;margin:0 0 1.3em;padding-left:1.35em;}
.article-content ol li{margin:0 0 .6em;}
.article-content ol li::marker{color:var(--color-primary);font-weight:600;}
.article-content blockquote{
  margin:1.7em 0;
  padding:16px 22px;
  background:var(--color-primary-soft);
  border-left:3px solid var(--color-primary);
  border-radius:0 12px 12px 0;
  color:var(--color-text-muted);
  font-size:.975rem;
}
.article-content blockquote p:last-child{margin-bottom:0;}
.article-content img{
  width:100%;
  border-radius:var(--radius-img);
  margin:1.6em 0 .6em;
  background:var(--color-primary-soft);
}
.article-content figure{margin:1.7em 0;}
.article-content figcaption{
  font-size:.8125rem;
  color:var(--color-text-faint);
  text-align:center;
  margin-top:8px;
}
.article-content code{
  padding:2px 6px;
  border-radius:6px;
  background:#EDF1F0;
  font-size:.9em;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
.article-content pre{
  padding:16px 18px;
  border-radius:var(--radius-input);
  background:#EDF1F0;
  overflow-x:auto;
  font-size:.9rem;
  line-height:1.7;
}
.article-content pre code{background:transparent;padding:0;}
.article-content table{
  width:100%;
  border-collapse:collapse;
  margin:1.6em 0;
  font-size:.9375rem;
}
.article-content th,.article-content td{
  border:1px solid var(--color-border);
  padding:10px 14px;
  text-align:left;
}
.article-content th{background:var(--color-primary-soft);color:var(--color-primary-dark);font-weight:600;}
.article-content tbody tr:nth-child(even){background:#FBFCFB;}
.article-content a{border-bottom:1px solid rgba(31,111,122,.35);}
.article-content hr{border:none;border-top:1px solid var(--color-border);margin:2.4em 0;}

/* 目录 */
.article-toc{
  position:sticky;
  top:96px;
  border-left:1px solid var(--color-border);
  padding-left:22px;
  max-height:calc(100vh - 160px);
  overflow-y:auto;
}
.toc-title{
  font-size:.75rem;
  letter-spacing:.14em;
  color:var(--color-text-faint);
  margin-bottom:14px;
  font-weight:600;
}
.toc-list a{
  display:block;
  margin-left:-24px;
  padding:7px 0 7px 13px;
  border-left:2px solid transparent;
  font-size:.875rem;
  line-height:1.55;
  color:var(--color-text-muted);
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.toc-list a.is-sub{padding-left:25px;font-size:.8125rem;color:var(--color-text-faint);}
.toc-list a:hover{color:var(--color-primary);}
.toc-list a.is-current{color:var(--color-primary);font-weight:600;border-left-color:var(--color-primary);}

/* 空态 */
.article-empty{
  padding:72px 24px;
  border:1px dashed var(--color-border);
  border-radius:var(--radius-card);
  background:var(--color-surface);
  text-align:center;
}
.article-empty i{font-size:2rem;color:var(--color-primary);opacity:.7;}
.article-empty h2{margin:18px 0 10px;font-size:1.25rem;}
.article-empty p{color:var(--color-text-muted);font-size:.9375rem;margin-bottom:22px;}

/* ---------- 相关推荐 ---------- */
.related-section{padding:56px 0 0;}
.related-head{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:16px;
  margin-bottom:24px;
}
.related-head h2{font-size:clamp(1.25rem,2.1vw,1.5rem);}
.related-head .more{font-size:.875rem;color:var(--color-text-muted);}
.related-head .more:hover{color:var(--color-primary);}
.related-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:22px;
}
.related-card{
  display:flex;
  flex-direction:column;
  background:var(--color-surface);
  border:1px solid var(--color-border);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-md);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.related-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-lg);
  border-color:rgba(31,111,122,.22);
}
.related-thumb{
  position:relative;
  aspect-ratio:16/9;
  background:var(--color-primary-soft);
  overflow:hidden;
}
.related-thumb img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .4s var(--ease);
}
.related-card:hover .related-thumb img{transform:scale(1.04);}
.related-body{padding:18px 20px 20px;}
.related-body h3{
  font-size:1.0625rem;
  line-height:1.45;
  margin:12px 0 0;
  transition:color .22s var(--ease);
}
.related-card:hover .related-body h3{color:var(--color-primary);}

/* ---------- 返回条 ---------- */
.back-row{
  display:flex;
  flex-wrap:wrap;
  gap:10px 26px;
  padding:38px 0 0;
  font-size:.9375rem;
}
.back-row a{display:inline-flex;align-items:center;gap:8px;color:var(--color-text-muted);}
.back-row a:hover{color:var(--color-primary);}
.back-row i{font-size:.8125rem;}

/* ---------- 尾部 CTA ---------- */
.cta-band{
  margin-top:72px;
  padding:52px 0;
  background:linear-gradient(135deg,rgba(31,111,122,.09) 0%,rgba(192,138,70,.10) 100%);
  border-top:1px solid var(--color-border);
  border-bottom:1px solid var(--color-border);
}
.cta-band-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:26px;
  flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(1.25rem,2.2vw,1.5rem);margin-bottom:8px;}
.cta-band p{margin:0;color:var(--color-text-muted);font-size:.9375rem;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:#123037;
  color:#C3D3D3;
  padding:68px 0 0;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:#fff;
  font-weight:700;
  font-size:1.0625rem;
  margin-bottom:16px;
}
.footer-brand:hover{color:#fff;}
.footer-brand .brand-mark{background:linear-gradient(140deg,#2C8D99 0%,#1F6F7A 100%);}
.site-footer p{
  font-size:.875rem;
  line-height:1.8;
  color:#9FB3B3;
  margin:0;
}
.site-footer h4{
  font-size:.8125rem;
  letter-spacing:.1em;
  color:#8FA8A8;
  margin-bottom:18px;
  font-weight:600;
}
.footer-links li,.footer-contact li{margin-bottom:11px;}
.footer-links a{
  font-size:.9rem;
  color:#C3D3D3;
}
.footer-links a:hover{color:#fff;}
.footer-contact li{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:.875rem;
  color:#9FB3B3;
}
.footer-contact i{margin-top:5px;color:var(--color-accent);font-size:.8125rem;}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  flex-wrap:wrap;
  margin-top:52px;
  padding:22px 0 26px;
  border-top:1px solid rgba(255,255,255,.1);
  font-size:.8125rem;
  color:#8FA8A8;
}

/* ---------- 浮动组件 ---------- */
.float-cta{
  position:fixed;
  right:28px;bottom:28px;
  z-index:55;
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:13px 24px;
  border-radius:var(--radius-pill);
  background:var(--color-primary);
  color:#fff;
  font-size:.9375rem;
  font-weight:600;
  box-shadow:var(--shadow-lg);
  opacity:0;
  pointer-events:none;
  transform:translateY(12px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),background .2s var(--ease);
}
.float-cta.is-visible{opacity:1;pointer-events:auto;transform:translateY(0);}
.float-cta:hover{background:var(--color-primary-dark);color:#fff;}
.back-top{
  position:fixed;
  right:28px;bottom:96px;
  z-index:54;
  width:44px;height:44px;
  display:none;
  align-items:center;justify-content:center;
  border:1px solid var(--color-border);
  border-radius:50%;
  background:#fff;
  color:var(--color-text-muted);
  box-shadow:var(--shadow-md);
  opacity:0;
  pointer-events:none;
  transform:translateY(12px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.back-top.is-visible{opacity:1;pointer-events:auto;transform:translateY(0);}
.back-top:hover{color:var(--color-primary);border-color:var(--color-primary);}

/* ---------- 响应式 ---------- */
@media (max-width:1240px){
  .nav-links a{padding:9px 7px;font-size:.9rem;}
  .nav-actions{gap:8px;}
}
@media (max-width:1099px){
  .nav-links{display:none;}
  .nav-toggle{display:inline-flex;}
  .back-top{display:none !important;}
}
@media (max-width:1023px){
  .article-layout{grid-template-columns:minmax(0,780px);gap:0;justify-content:center;}
  .article-toc{display:none;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:860px){
  .cta-band-inner{flex-direction:column;align-items:flex-start;}
}
@media (max-width:640px){
  body{font-size:16px;padding-bottom:56px;}
  .nav-row{height:64px;}
  .brand-text{font-size:1rem;}
  .article-hero{padding:104px 0 36px;}
  .article-title{font-size:1.5rem;}
  .article-meta{font-size:.78rem;gap:8px 14px;}
  .article-main{padding:40px 0 16px;}
  .article-content{font-size:16px;line-height:1.86;}
  .related-grid{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px;}
  .site-footer{padding-top:52px;}
  .footer-bottom{margin-top:36px;flex-direction:column;align-items:flex-start;}
  .float-cta{
    left:0;right:0;bottom:0;
    width:100%;
    height:56px;
    padding:0;
    border-radius:0;
    justify-content:center;
    transform:translateY(100%);
  }
  .float-cta.is-visible{transform:translateY(0);}
  .cta-band{margin-top:52px;padding:40px 0;}
}
@media (max-width:520px){
  .article-content table{display:block;overflow-x:auto;white-space:nowrap;}
  .article-content th,.article-content td{padding:9px 12px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    transition-duration:.001ms !important;
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
  }
  .related-card:hover{transform:none;}
  .btn--primary:hover{transform:none;}
  .float-cta,.back-top{transform:none;}
}

/* roulang page: category2 */
/* ============ 设计变量 ============ */
:root{
  --color-primary:#1F6F7A;
  --color-primary-deep:#14515C;
  --color-primary-soft:#E6F1F2;
  --color-primary-10:rgba(31,111,122,.10);
  --color-accent:#C08A46;
  --color-accent-soft:#F3E7D6;
  --color-bg:#FAFAF7;
  --color-surface:#F3F5F4;
  --color-card:#FFFFFF;
  --color-text:#16211F;
  --color-muted:#5A6B6B;
  --color-faint:#8A9896;
  --color-line:#E4E8E6;
  --color-footer:#123037;
  --color-success:#2F8F6B;
  --radius-card:16px;
  --radius-img:13px;
  --radius-input:12px;
  --radius-pill:999px;
  --shadow-sm:0 1px 2px rgba(22,33,31,.05);
  --shadow-md:0 8px 24px -12px rgba(20,80,90,.18);
  --shadow-lg:0 24px 48px -24px rgba(20,80,90,.22);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}

/* ============ 基础重置 ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.75;
  color:var(--color-text);
  background:var(--color-bg);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block;border:0;}
a{color:var(--color-primary);text-decoration:none;transition:color .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease);}
a:hover{color:var(--color-primary-deep);}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.28;letter-spacing:-.01em;color:var(--color-text);}
p{margin:0 0 1em;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;font-size:inherit;cursor:pointer;background:none;border:0;color:inherit;}
:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px;border-radius:6px;}
::selection{background:var(--color-primary-soft);color:var(--color-primary-deep);}

/* ============ 容器与栅格 ============ */
.row{max-width:1200px;padding-left:8px;padding-right:8px;margin-left:auto;margin-right:auto;}
.row::before,.row::after{content:" ";display:table;}
.row::after{clear:both;}
.columns{padding-left:16px;padding-right:16px;}
.row .columns{float:left;}

/* ============ 区块通用 ============ */
.section{padding:104px 0;}
.section--alt{background:var(--color-surface);}
.section--flush{padding-bottom:44px;}
.section--cta{padding:0 0 104px;}
.section-eyebrow{
  display:inline-block;
  font-size:13px;
  font-weight:600;
  letter-spacing:.16em;
  color:var(--color-accent);
  margin-bottom:14px;
}
.section h2{font-size:clamp(1.5rem,2.6vw,2.125rem);font-weight:700;}
.section-lead{margin-top:16px;margin-bottom:0;color:var(--color-muted);font-size:16px;max-width:64ch;line-height:1.85;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;
  border-radius:var(--radius-pill);
  font-size:15.5px;font-weight:600;
  border:1.5px solid transparent;
  white-space:nowrap;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.btn--sm{height:40px;padding:0 18px;font-size:14.5px;}
.btn--primary{background:var(--color-primary);color:#fff;box-shadow:0 10px 22px -14px rgba(20,80,90,.85);}
.btn--primary:hover{background:var(--color-primary-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-lg);}
.btn--primary:active{transform:translateY(0);}
.btn--outline{border-color:var(--color-primary);color:var(--color-primary);background:transparent;}
.btn--outline:hover{background:var(--color-primary-soft);color:var(--color-primary-deep);transform:translateY(-1px);}
.btn--ghost{border-color:rgba(22,33,31,.16);color:var(--color-text);background:rgba(255,255,255,.66);}
.btn--ghost:hover{background:#fff;border-color:rgba(31,111,122,.42);color:var(--color-primary-deep);transform:translateY(-1px);}
.btn--light{background:#fff;color:var(--color-primary-deep);box-shadow:var(--shadow-md);}
.btn--light:hover{background:#fff;color:var(--color-primary);transform:translateY(-1px);box-shadow:var(--shadow-lg);}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none;}

/* ============ 顶部导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:rgba(255,255,255,.14);
  border-bottom:1px solid rgba(255,255,255,.30);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  box-shadow:0 10px 30px -26px rgba(20,80,90,.9);
  transition:background-color .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.site-header.is-scrolled{background:rgba(255,255,255,.97);border-bottom-color:var(--color-line);box-shadow:var(--shadow-md);}
.nav-row{display:flex;align-items:center;justify-content:space-between;min-height:74px;}
.nav-brand-col{display:flex;align-items:center;}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--color-text);letter-spacing:-.01em;}
.brand:hover{color:var(--color-primary-deep);}
.brand-mark{
  position:relative;flex:none;width:26px;height:26px;border-radius:9px;
  background:linear-gradient(140deg,var(--color-primary),#2E96A3);
  box-shadow:0 6px 14px -8px rgba(20,80,90,.85);
}
.brand-mark::after{content:"";position:absolute;inset:8px;border-radius:4px;border:2px solid rgba(255,255,255,.86);}
.nav-main-col{display:flex;align-items:center;justify-content:flex-end;gap:8px;}
.nav-links{display:flex;align-items:center;gap:2px;}
.nav-links a{
  position:relative;display:inline-block;padding:10px 11px;
  font-size:14.5px;color:var(--color-muted);border-radius:8px;white-space:nowrap;
}
.nav-links a:hover{color:var(--color-text);background:var(--color-primary-10);}
.nav-links a.is-active{color:var(--color-primary-deep);font-weight:600;}
.nav-links a.is-active::after{
  content:"";position:absolute;left:11px;right:11px;bottom:4px;height:2px;border-radius:2px;background:var(--color-primary);
}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:12px;}
.nav-icon-btn{
  width:38px;height:38px;border-radius:50%;
  border:1px solid var(--color-line);background:#fff;color:var(--color-muted);
  display:inline-flex;align-items:center;justify-content:center;
  transition:color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease);
}
.nav-icon-btn:hover{color:var(--color-primary);border-color:rgba(31,111,122,.36);box-shadow:var(--shadow-sm);transform:translateY(-1px);}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:50%;
  border:1px solid var(--color-line);background:#fff;color:var(--color-text);
  align-items:center;justify-content:center;
}
.nav-toggle:hover{color:var(--color-primary);}

/* ============ 分类 Hero ============ */
.page-hero{position:relative;padding:152px 0 78px;overflow:hidden;background:var(--color-bg);}
.page-hero__bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  opacity:.55;
}
.page-hero__bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(250,250,247,.78) 0%,rgba(230,241,242,.88) 55%,var(--color-bg) 100%);
}
.page-hero::before{
  content:"";position:absolute;left:-90px;top:110px;width:300px;height:300px;
  border:1px solid rgba(31,111,122,.14);border-radius:52px;transform:rotate(24deg);pointer-events:none;
}
.page-hero::after{
  content:"";position:absolute;right:-70px;top:40px;width:340px;height:340px;
  border:1px solid rgba(192,138,70,.16);border-radius:48px;transform:rotate(18deg);pointer-events:none;
}
.page-hero__inner{position:relative;z-index:2;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--color-faint);margin-bottom:18px;}
.breadcrumb a{color:var(--color-muted);}
.breadcrumb a:hover{color:var(--color-primary);}
.breadcrumb .is-current{color:var(--color-primary);font-weight:600;}
.breadcrumb .sep{color:var(--color-faint);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:var(--radius-pill);
  background:rgba(255,255,255,.82);border:1px solid rgba(31,111,122,.18);
  color:var(--color-primary-deep);font-size:13px;font-weight:600;margin-bottom:20px;
}
.page-hero h1{font-size:clamp(1.8rem,3.6vw,2.9rem);font-weight:700;max-width:920px;letter-spacing:-.015em;}
.page-hero__sub{margin-top:20px;margin-bottom:0;font-size:17px;line-height:1.85;color:var(--color-muted);max-width:62ch;}
.page-hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-trust{
  display:flex;flex-wrap:wrap;gap:12px 30px;
  margin-top:34px;padding-top:24px;border-top:1px solid var(--color-line);
  font-size:14px;color:var(--color-muted);
}
.hero-trust li{display:flex;align-items:center;gap:9px;}
.hero-trust li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--color-accent);flex:none;}

/* ============ 卡片矩阵（双列错位） ============ */
.matrix-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;align-items:start;margin-top:44px;}
.matrix-card{
  display:flex;flex-direction:column;
  background:var(--color-card);border:1px solid var(--color-line);
  border-radius:var(--radius-card);box-shadow:var(--shadow-md);overflow:hidden;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.matrix-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(31,111,122,.24);}
.matrix-card--offset{margin-top:40px;}
.matrix-card__media{aspect-ratio:16/9;background:var(--color-primary-soft);overflow:hidden;}
.matrix-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.matrix-card:hover .matrix-card__media img{transform:scale(1.03);}
.matrix-card__body{padding:26px 26px 28px;display:flex;flex-direction:column;flex:1;}
.matrix-card__body h3{margin:14px 0 10px;font-size:1.2rem;}
.matrix-card__body p{color:var(--color-muted);font-size:15.5px;line-height:1.8;margin-bottom:14px;}
.badge{
  display:inline-block;padding:5px 12px;border-radius:var(--radius-pill);
  background:var(--color-primary-soft);color:var(--color-primary-deep);
  font-size:12px;font-weight:600;letter-spacing:.02em;align-self:flex-start;
}
.badge--accent{background:var(--color-accent-soft);color:#8A5E24;}
.mini-list{display:grid;gap:9px;margin:4px 0 0;}
.mini-list li{position:relative;padding-left:18px;font-size:14.5px;color:var(--color-muted);line-height:1.7;}
.mini-list li::before{content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:2px;background:var(--color-accent);}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:6px;}
.tag{
  display:inline-flex;align-items:center;padding:5px 12px;border-radius:var(--radius-pill);
  border:1px solid var(--color-line);background:var(--color-surface);
  color:var(--color-muted);font-size:12.5px;
}

/* ============ 指标条 ============ */
.metrics-wrap{padding:0 0 104px;}
.metrics{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  background:var(--color-footer);border-radius:20px;overflow:hidden;box-shadow:var(--shadow-lg);
}
.metric{padding:32px 28px;border-right:1px solid rgba(255,255,255,.10);}
.metric:last-child{border-right:0;}
.metric__num{
  display:block;font-size:clamp(1.6rem,2.6vw,2.1rem);font-weight:700;color:#fff;
  letter-spacing:-.02em;line-height:1.1;
  font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;
}
.metric__label{display:block;margin-top:8px;font-size:13.5px;color:rgba(255,255,255,.68);line-height:1.6;}

/* ============ 图文分栏 ============ */
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:56px;align-items:center;}
.split__media{
  position:relative;border-radius:var(--radius-card);overflow:hidden;
  background:var(--color-primary-soft);box-shadow:var(--shadow-lg);
}
.split__media img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.split__stat{
  position:absolute;left:22px;bottom:22px;
  background:#fff;border-radius:14px;padding:14px 20px;box-shadow:var(--shadow-md);
}
.split__stat b{display:block;font-size:1.35rem;font-weight:700;color:var(--color-primary-deep);font-variant-numeric:tabular-nums;line-height:1.2;}
.split__stat span{display:block;margin-top:4px;font-size:12.5px;color:var(--color-faint);}
.num-list{display:grid;gap:24px;margin-top:28px;}
.num-item{display:grid;grid-template-columns:52px minmax(0,1fr);gap:16px;align-items:start;}
.num-item__n{
  font-size:1.6rem;font-weight:700;color:var(--color-primary);opacity:.34;
  line-height:1.1;font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;
}
.num-item h3{font-size:1.08rem;margin-bottom:8px;}
.num-item p{margin:0;color:var(--color-muted);font-size:15.5px;line-height:1.8;}

/* ============ 流程步骤 ============ */
.steps{position:relative;margin-top:46px;max-width:860px;}
.steps::before{
  content:"";position:absolute;left:19px;top:14px;bottom:14px;width:2px;
  background:linear-gradient(180deg,rgba(31,111,122,.38),rgba(31,111,122,.05));
}
.step{position:relative;padding:0 0 36px 66px;}
.step:last-child{padding-bottom:0;}
.step__dot{
  position:absolute;left:6px;top:0;width:28px;height:28px;border-radius:50%;
  background:#fff;border:2px solid var(--color-primary);color:var(--color-primary);
  font-size:11px;font-weight:700;display:flex;align-items:center;justify-content:center;
  font-variant-numeric:tabular-nums;box-shadow:0 0 0 4px rgba(230,241,242,.9);
}
.step h3{font-size:1.12rem;margin-bottom:8px;}
.step p{margin:0;color:var(--color-muted);font-size:15.5px;line-height:1.8;max-width:66ch;}

/* ============ FAQ ============ */
.faq-wrap{max-width:880px;margin:46px auto 0;}
.faq-item{border-bottom:1px solid var(--color-line);}
.faq-item:first-child{border-top:1px solid var(--color-line);}
.faq-item__q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;text-align:left;font-size:17px;font-weight:600;color:var(--color-text);
  transition:color .2s var(--ease);
}
.faq-item__q:hover{color:var(--color-primary);}
.faq-item__icon{
  flex:none;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--color-line);color:var(--color-primary);
  display:flex;align-items:center;justify-content:center;font-size:11px;
  transition:transform .25s var(--ease),background-color .25s var(--ease),border-color .25s var(--ease);
}
.faq-item.is-open .faq-item__icon{transform:rotate(180deg);background:var(--color-primary-soft);border-color:transparent;}
.faq-item__a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease);}
.faq-item__a p{padding:0 4px 26px;margin:0;color:var(--color-muted);font-size:15px;line-height:1.85;max-width:72ch;}

/* ============ 交叉分类 ============ */
.cross-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;margin-top:42px;}
.cross-card{
  display:flex;flex-direction:column;height:100%;
  background:#fff;border:1px solid var(--color-line);border-radius:var(--radius-card);
  padding:26px;box-shadow:var(--shadow-sm);color:inherit;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.cross-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(31,111,122,.24);color:inherit;}
.cross-card h3{font-size:1.05rem;margin:14px 0 8px;}
.cross-card p{margin:0;color:var(--color-muted);font-size:14.5px;line-height:1.8;}
.cross-card__go{
  margin-top:auto;padding-top:18px;display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:600;color:var(--color-primary);
}
.cross-card:hover .cross-card__go{color:var(--color-primary-deep);}

/* ============ 尾部 CTA ============ */
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  padding:44px 44px;
  border-radius:22px;
  background:linear-gradient(135deg,rgba(31,111,122,.12),rgba(250,250,247,0) 62%),var(--color-primary-soft);
  border:1px solid rgba(31,111,122,.14);
}
.cta-band h2{font-size:clamp(1.3rem,2.2vw,1.72rem);max-width:34ch;}
.cta-band p{margin:12px 0 0;color:var(--color-muted);font-size:15px;max-width:52ch;}

/* ============ 页脚 ============ */
.site-footer{background:var(--color-footer);color:rgba(255,255,255,.78);padding:72px 0 0;margin-top:8px;}
.footer-grid{display:flex;flex-wrap:wrap;padding-bottom:44px;}
.footer-brand{display:inline-flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:17px;margin-bottom:18px;}
.footer-brand:hover{color:#fff;}
.site-footer p{font-size:14.5px;line-height:1.9;color:rgba(255,255,255,.62);max-width:36ch;margin:0;}
.site-footer h4{color:#fff;font-size:13.5px;font-weight:600;letter-spacing:.1em;margin-bottom:18px;}
.footer-links li{margin-bottom:11px;}
.footer-links a{color:rgba(255,255,255,.72);font-size:14.5px;}
.footer-links a:hover{color:#fff;}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;margin-bottom:12px;font-size:14.5px;color:rgba(255,255,255,.72);line-height:1.7;}
.footer-contact i{margin-top:5px;color:var(--color-accent);flex:none;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0 30px;
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13.5px;color:rgba(255,255,255,.55);
}

/* ============ 浮动 CTA / 回到顶部 ============ */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:80;
  display:inline-flex;align-items:center;gap:10px;
  height:50px;padding:0 22px;border-radius:var(--radius-pill);
  background:var(--color-primary);color:#fff;font-size:15px;font-weight:600;
  box-shadow:var(--shadow-lg);
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity .25s var(--ease),transform .25s var(--ease),background-color .2s var(--ease);
}
.float-cta.is-visible{opacity:1;transform:none;pointer-events:auto;}
.float-cta:hover{background:var(--color-primary-deep);color:#fff;}
.to-top{
  position:fixed;right:26px;bottom:92px;z-index:75;
  width:44px;height:44px;border-radius:50%;
  background:#fff;border:1px solid var(--color-line);color:var(--color-primary);
  display:none;align-items:center;justify-content:center;box-shadow:var(--shadow-md);
  transition:opacity .25s var(--ease),transform .25s var(--ease),color .2s var(--ease);
}
.to-top:hover{color:var(--color-primary-deep);}
@media (min-width:1200px){
  .to-top{display:inline-flex;opacity:0;pointer-events:none;transform:translateY(10px);}
  .to-top.is-visible{opacity:1;pointer-events:auto;transform:none;}
}

/* ============ 入场动画 ============ */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .section{padding:80px 0;}
  .section--flush{padding-bottom:36px;}
  .section--cta{padding:0 0 80px;}
  .metrics-wrap{padding:0 0 80px;}
  .page-hero{padding:130px 0 64px;}
  .matrix-grid{grid-template-columns:1fr;}
  .matrix-card--offset{margin-top:0;}
  .metrics{grid-template-columns:repeat(2,minmax(0,1fr));}
  .metric:nth-child(2){border-right:0;}
  .metric:nth-child(1),.metric:nth-child(2){border-bottom:1px solid rgba(255,255,255,.10);}
  .split{grid-template-columns:1fr;gap:38px;}
  .cross-grid{grid-template-columns:1fr;}
  .cta-band{padding:36px 30px;}

  .nav-links{
    position:fixed;inset:0;z-index:70;
    flex-direction:column;align-items:stretch;justify-content:flex-start;gap:0;
    padding:92px 24px 40px;background:#fff;
    transform:translateX(102%);overflow-y:auto;
    transition:transform .3s var(--ease);
  }
  body.nav-open .nav-links{transform:translateX(0);}
  body.nav-open .site-header{-webkit-backdrop-filter:none;backdrop-filter:none;background:#fff;box-shadow:none;border-bottom-color:transparent;}
  body.nav-open{overflow:hidden;}
  .nav-links a{
    padding:0 4px;height:52px;line-height:52px;font-size:17px;border-radius:0;
    border-bottom:1px solid var(--color-line);color:var(--color-text);
  }
  .nav-links a.is-active{color:var(--color-primary);}
  .nav-links a.is-active::after{display:none;}
  .nav-toggle{display:inline-flex;}
}
@media (max-width:639px){
  body{font-size:16px;padding-bottom:56px;}
  .section{padding:64px 0;}
  .section--cta{padding:0 0 64px;}
  .metrics-wrap{padding:0 0 64px;}
  .row{padding-left:6px;padding-right:6px;}
  .columns{padding-left:14px;padding-right:14px;}
  .page-hero{padding:118px 0 54px;}
  .page-hero h1{font-size:1.68rem;}
  .page-hero__sub{font-size:16px;}
  .page-hero__actions .btn{flex:1 1 auto;}
  .hero-trust{gap:10px 18px;font-size:13.5px;}
  .metrics{grid-template-columns:1fr;border-radius:16px;}
  .metric{border-right:0;border-bottom:1px solid rgba(255,255,255,.10);padding:24px 22px;}
  .metric:last-child{border-bottom:0;}
  .matrix-card__body{padding:22px;}
  .num-item{grid-template-columns:40px minmax(0,1fr);gap:12px;}
  .num-item__n{font-size:1.35rem;}
  .step{padding-left:56px;}
  .steps::before{left:17px;}
  .step__dot{left:4px;}
  .cta-band{padding:30px 22px;border-radius:18px;}
  .cta-band .btn{width:100%;}
  .float-cta{
    left:0;right:0;bottom:0;height:56px;border-radius:0;
    justify-content:center;padding:0 16px calc(env(safe-area-inset-bottom));
  }
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media (max-width:340px){
  .page-hero h1{font-size:1.5rem;}
}

/* ============ 减少动态效果 ============ */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  .reveal{opacity:1;transform:none;}
  .matrix-card:hover,.cross-card:hover,.btn:hover{transform:none;}
}

/* roulang page: category3 */
:root{
  --primary:#1F6F7A;
  --primary-dark:#14515C;
  --primary-light:#E6F1F2;
  --primary-10:rgba(31,111,122,.10);
  --accent:#C08A46;
  --accent-light:#F3E7D6;
  --bg:#FAFAF7;
  --bg-alt:#F3F5F4;
  --card:#FFFFFF;
  --text:#16211F;
  --muted:#5A6B6B;
  --weak:#8A9896;
  --line:#E4E8E6;
  --ok:#2F8F6B;
  --warn:#C25B3E;
  --r-card:16px;
  --r-img:13px;
  --r-input:12px;
  --r-pill:999px;
  --sh-sm:0 1px 2px rgba(22,33,31,.05);
  --sh-md:0 8px 24px -12px rgba(20,80,90,.18);
  --sh-lg:0 24px 48px -24px rgba(20,80,90,.22);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto 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-cn);
  font-size:17px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:color .22s var(--ease)}
a:hover{color:var(--primary-dark)}
h1,h2,h3,h4,h5,h6{margin:0;font-weight:650;letter-spacing:-.01em;color:var(--text);line-height:1.28;font-family:var(--font-cn)}
p{margin:0 0 1em}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:var(--font-cn)}
::selection{background:var(--primary-light);color:var(--primary-dark)}

.row{max-width:1200px;margin-left:auto;margin-right:auto;padding-left:12px;padding-right:12px}
.row .columns{padding-left:12px;padding-right:12px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-pill);padding:14px 26px;font-size:15px;font-weight:600;
  line-height:1;border:1.5px solid transparent;cursor:pointer;background:transparent;
  color:var(--text);transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease),transform .22s var(--ease);
  white-space:nowrap;
}
.btn--primary{background:var(--primary);border-color:var(--primary);color:#fff}
.btn--primary:hover{background:var(--primary-dark);border-color:var(--primary-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-lg)}
.btn--outline{border-color:var(--primary);color:var(--primary);background:transparent}
.btn--outline:hover{background:var(--primary-light);color:var(--primary-dark);transform:translateY(-1px)}
.btn--ghost{border-color:rgba(255,255,255,.6);color:#fff;background:rgba(255,255,255,.12)}
.btn--ghost:hover{background:rgba(255,255,255,.24);color:#fff}
.btn--sm{padding:10px 18px;font-size:14px}
.btn:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  background:rgba(255,255,255,.14);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid rgba(255,255,255,.28);
  box-shadow:0 2px 14px rgba(20,80,90,.06);
  transition:background .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.96);
  border-bottom-color:var(--line);
  box-shadow:var(--sh-md);
}
.nav-row{display:flex;align-items:center;min-height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-weight:700;font-size:17px;letter-spacing:.01em}
.brand:hover{color:var(--primary-dark)}
.brand-mark{
  width:26px;height:26px;border-radius:8px;flex:0 0 26px;
  background:linear-gradient(135deg,var(--primary),var(--primary-dark));
  position:relative;
}
.brand-mark::after{
  content:"";position:absolute;inset:6px;border:1.5px solid rgba(255,255,255,.85);
  border-radius:3px;
}
.brand-text{white-space:nowrap}
.nav-main-col{display:flex;align-items:center;justify-content:flex-end;gap:16px}
.nav-links{display:flex;align-items:center;flex-wrap:nowrap;gap:16px;font-size:14.5px}
.nav-links a{position:relative;color:var(--text);opacity:.85;padding:6px 0;font-weight:500;white-space:nowrap}
.nav-links a:hover{opacity:1;color:var(--primary)}
.nav-links a.is-active{opacity:1;color:var(--primary);font-weight:600}
.nav-links a.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;border-radius:2px;background:var(--primary);
}
.nav-actions{display:flex;align-items:center;gap:10px}
.nav-icon-btn{
  width:38px;height:38px;border-radius:50%;border:1px solid var(--line);
  background:rgba(255,255,255,.7);color:var(--text);display:inline-flex;align-items:center;justify-content:center;
  cursor:pointer;transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.nav-icon-btn:hover{background:var(--primary-light);color:var(--primary);border-color:var(--primary-10)}
.nav-icon-btn:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:12px;border:1px solid var(--line);
  background:rgba(255,255,255,.75);color:var(--text);align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle:focus-visible{outline:2px solid var(--primary);outline-offset:2px}

.mobile-drawer{
  position:fixed;inset:0;z-index:90;background:#fff;padding:86px 24px 32px;
  transform:translateX(100%);transition:transform .3s var(--ease);
  display:flex;flex-direction:column;gap:4px;overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateX(0)}
.mobile-drawer a{
  display:flex;align-items:center;min-height:52px;color:var(--text);font-size:16px;
  border-bottom:1px solid var(--line);
}
.mobile-drawer a.is-active{color:var(--primary);font-weight:600}
.mobile-drawer .drawer-cta{margin-top:24px;border-bottom:none}
.drawer-close{
  position:absolute;top:18px;right:20px;width:42px;height:42px;border-radius:12px;
  border:1px solid var(--line);background:#fff;color:var(--text);cursor:pointer;
  display:inline-flex;align-items:center;justify-content:center;
}

/* ---------- hero ---------- */
.page-hero{
  position:relative;
  padding:150px 0 76px;
  min-height:300px;
  background-image:linear-gradient(180deg,rgba(250,250,247,.93),rgba(250,250,247,.97)),url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(90deg,var(--primary-10) 1px,transparent 1px),linear-gradient(180deg,var(--primary-10) 1px,transparent 1px);
  background-size:56px 56px;
  opacity:.35;
  pointer-events:none;
}
.page-hero::after{
  content:"";position:absolute;right:-120px;top:-80px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(31,111,122,.12),rgba(31,111,122,0) 70%);
  pointer-events:none;
}
.page-hero .row{position:relative;z-index:2}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--weak);margin-bottom:20px;flex-wrap:wrap}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:var(--weak)}
.breadcrumb .current{color:var(--primary)}
.page-hero h1{
  font-size:clamp(1.9rem,3.6vw,2.75rem);
  font-weight:700;
  letter-spacing:-.015em;
  max-width:760px;
}
.hero-lead{max-width:660px;margin-top:18px;font-size:17px;color:var(--muted);line-height:1.8}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:26px;font-size:13.5px;color:var(--muted)}
.hero-tags span{display:inline-flex;align-items:center;gap:8px}
.hero-tags i{color:var(--accent);font-size:12px}

/* ---------- section ---------- */
.section{padding:96px 0}
.section--alt{background:var(--bg-alt)}
.section--tight{padding:80px 0}
.section-head{max-width:720px;margin-bottom:48px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:600;
  letter-spacing:.06em;color:var(--primary);background:var(--primary-light);
  border-radius:var(--r-pill);padding:6px 14px;margin-bottom:16px;
}
.section-title{font-size:clamp(1.5rem,2.6vw,2.05rem);font-weight:650}
.section-desc{margin-top:14px;color:var(--muted);font-size:16px}

/* ---------- timeline ---------- */
.timeline{position:relative;max-width:900px;margin:0 auto}
.timeline::before{
  content:"";position:absolute;left:21px;top:12px;bottom:36px;width:2px;
  background:linear-gradient(180deg,var(--primary-10),rgba(31,111,122,.28),var(--primary-10));
}
.tl-item{position:relative;padding-left:74px;padding-bottom:48px}
.tl-item:last-child{padding-bottom:0}
.tl-dot{
  position:absolute;left:0;top:0;width:44px;height:44px;border-radius:50%;
  background:#fff;border:1.5px solid var(--primary-10);box-shadow:var(--sh-sm);
  display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:15px;color:var(--primary);font-variant-numeric:tabular-nums;
}
.tl-item:hover .tl-dot{border-color:var(--primary);background:var(--primary-light)}
.tl-title{font-size:1.125rem;font-weight:650;margin-bottom:8px}
.tl-text{color:var(--muted);font-size:15.5px;max-width:640px}
.tl-points{margin-top:14px;display:flex;flex-direction:column;gap:8px}
.tl-points li{position:relative;padding-left:18px;font-size:14.5px;color:var(--muted)}
.tl-points li::before{
  content:"";position:absolute;left:0;top:.62em;width:6px;height:6px;border-radius:50%;
  background:var(--accent);
}
.tl-figure{margin-top:20px;max-width:520px}
.tl-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-img);box-shadow:var(--sh-md);background:var(--primary-light)}
.tl-figure figcaption{font-size:13px;color:var(--weak);margin-top:10px}

/* ---------- info cards ---------- */
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-md);padding:26px;height:100%;
  transition:transform .26s var(--ease),box-shadow .26s var(--ease),border-color .26s var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);border-color:rgba(31,111,122,.22)}
.card h3{font-size:1.0625rem;margin-bottom:10px}
.card p{color:var(--muted);font-size:15px;margin-bottom:0}
.card-icon{
  width:44px;height:44px;border-radius:13px;background:var(--accent-light);color:var(--accent);
  display:inline-flex;align-items:center;justify-content:center;font-size:17px;margin-bottom:16px;
}
.grid-gap{margin-top:-24px}
.grid-gap > [class*="columns"]{margin-top:24px}

.side-note{
  background:linear-gradient(180deg,#fff,var(--primary-light));
  border:1px solid var(--primary-10);border-radius:var(--r-card);padding:28px;box-shadow:var(--sh-md);height:100%;
}
.side-note h3{font-size:1.0625rem;margin-bottom:12px}
.side-note ul{display:flex;flex-direction:column;gap:12px;margin-top:6px}
.side-note li{display:flex;gap:10px;font-size:14.5px;color:var(--muted)}
.side-note li i{color:var(--primary);margin-top:4px;font-size:13px}
.side-note .figure{margin-top:22px}
.side-note .figure img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-img);background:var(--primary-light)}

/* ---------- status strip ---------- */
.status-grid{display:flex;flex-wrap:wrap;gap:20px;margin-top:-20px}
.status-item{
  flex:1 1 calc(25% - 20px);min-width:230px;margin-top:20px;
  background:#fff;border:1px solid var(--line);border-left:3px solid var(--primary);
  border-radius:14px;padding:22px;box-shadow:var(--sh-sm);
  transition:box-shadow .26s var(--ease),transform .26s var(--ease);
}
.status-item:hover{box-shadow:var(--sh-md);transform:translateY(-3px)}
.status-item.warn{border-left-color:var(--warn)}
.status-item.ok{border-left-color:var(--ok)}
.status-item.accent{border-left-color:var(--accent)}
.status-badge{
  display:inline-block;font-size:11.5px;font-weight:600;letter-spacing:.04em;
  padding:4px 10px;border-radius:var(--r-pill);background:var(--primary-light);color:var(--primary);margin-bottom:12px;
}
.status-item.warn .status-badge{background:#FBEDE8;color:var(--warn)}
.status-item.ok .status-badge{background:#E7F4EE;color:var(--ok)}
.status-item.accent .status-badge{background:var(--accent-light);color:#9A6C2E}
.status-item h3{font-size:1rem;margin-bottom:8px}
.status-item p{font-size:14.5px;color:var(--muted);margin-bottom:0}

/* ---------- faq ---------- */
.faq-wrap{max-width:880px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:transparent;border:0;padding:22px 0;text-align:left;cursor:pointer;
  font-size:17px;font-weight:600;color:var(--text);transition:color .22s var(--ease);
}
.faq-q:hover{color:var(--primary)}
.faq-q:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:8px}
.faq-q i{color:var(--primary);font-size:14px;transition:transform .28s var(--ease)}
.faq-item.is-open .faq-q i{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s var(--ease)}
.faq-a-inner{padding:0 0 22px;color:var(--muted);font-size:15px;line-height:1.8;max-width:760px}

/* ---------- cross links ---------- */
.cross-card{
  display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-md);height:100%;
  transition:transform .26s var(--ease),box-shadow .26s var(--ease),border-color .26s var(--ease);
}
.cross-card:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);border-color:rgba(31,111,122,.22)}
.cross-media{aspect-ratio:16/9;overflow:hidden;background:var(--primary-light)}
.cross-media img{width:100%;height:100%;object-fit:cover}
.cross-body{padding:22px 24px 26px}
.cross-body .tag{
  display:inline-block;font-size:11.5px;font-weight:600;color:var(--primary);
  background:var(--primary-light);border-radius:var(--r-pill);padding:4px 10px;margin-bottom:12px;
}
.cross-body h3{font-size:1.0625rem;margin-bottom:8px;color:var(--text)}
.cross-card:hover .cross-body h3{color:var(--primary)}
.cross-body p{font-size:14.5px;color:var(--muted);margin-bottom:14px}
.cross-more{font-size:14px;font-weight:600;color:var(--primary);display:inline-flex;align-items:center;gap:6px}

/* ---------- cta band ---------- */
.cta-band{
  background:linear-gradient(120deg,rgba(230,241,242,.9),rgba(250,250,247,.98) 60%);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:64px 0;
}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.cta-band h2{font-size:clamp(1.3rem,2.2vw,1.75rem)}
.cta-band p{margin:8px 0 0;color:var(--muted);font-size:15.5px}

/* ---------- footer ---------- */
.site-footer{background:#123037;color:#CFE0E0;padding:72px 0 0;font-size:14.5px}
.site-footer .row .columns{padding-left:12px;padding-right:12px}
.footer-grid{padding-bottom:44px}
.footer-brand{display:inline-flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:17px;margin-bottom:16px}
.footer-brand:hover{color:#fff}
.footer-brand .brand-mark{background:linear-gradient(135deg,#2C8C99,#1F6F7A)}
.site-footer p{color:#9FB8B8;font-size:14px;line-height:1.8;max-width:320px}
.site-footer h4{color:#fff;font-size:14px;font-weight:600;letter-spacing:.04em;margin-bottom:18px}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{color:#9FB8B8}
.footer-links a:hover{color:#fff}
.footer-contact{display:flex;flex-direction:column;gap:12px}
.footer-contact li{display:flex;gap:10px;color:#9FB8B8;align-items:flex-start}
.footer-contact i{color:#6FA9AE;margin-top:4px;font-size:13px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:22px 0 26px;
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:#8AA4A4;
}

/* ---------- floating ---------- */
.float-cta{
  position:fixed;right:26px;bottom:26px;z-index:70;
  display:inline-flex;align-items:center;gap:9px;
  background:var(--primary);color:#fff;border-radius:var(--r-pill);
  padding:14px 22px;font-size:14.5px;font-weight:600;box-shadow:var(--sh-lg);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),background .22s var(--ease),visibility .3s;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta:hover{background:var(--primary-dark);color:#fff}
.float-cta:focus-visible{outline:2px solid #fff;outline-offset:2px}

.back-top{
  position:fixed;right:26px;bottom:96px;z-index:65;width:46px;height:46px;border-radius:50%;
  background:#fff;border:1px solid var(--line);color:var(--primary);box-shadow:var(--sh-md);
  display:none;align-items:center;justify-content:center;cursor:pointer;
  opacity:0;transition:opacity .28s var(--ease),transform .28s var(--ease),background .22s var(--ease);
}
.back-top.is-visible{opacity:1}
.back-top:hover{background:var(--primary-light);transform:translateY(-2px)}
.back-top:focus-visible{outline:2px solid var(--primary);outline-offset:2px}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  .nav-links{gap:13px;font-size:14px}
  .back-top{display:none !important}
}
@media (max-width:1023.98px){
  .nav-links{display:none}
  .nav-toggle{display:inline-flex}
  .nav-icon-btn{display:none}
  .section{padding:80px 0}
  .section--tight{padding:68px 0}
  .page-hero{padding:132px 0 64px}
}
@media (max-width:767.98px){
  body{font-size:16px}
  .section{padding:68px 0}
  .section--tight{padding:58px 0}
  .section-head{margin-bottom:34px}
  .timeline::before{left:17px}
  .tl-item{padding-left:60px;padding-bottom:38px}
  .tl-dot{width:36px;height:36px;font-size:14px}
  .card,.side-note{padding:22px}
  .status-item{flex:1 1 100%}
  .cta-band{padding:52px 0}
  .footer-grid{padding-bottom:30px}
}
@media (max-width:639.98px){
  body{padding-bottom:56px}
  .row{padding-left:9px;padding-right:9px}
  .row .columns{padding-left:11px;padding-right:11px}
  .nav-row{min-height:64px}
  .brand{font-size:15.5px}
  .brand-mark{width:23px;height:23px;flex:0 0 23px}
  .page-hero{padding:118px 0 54px;min-height:260px}
  .hero-actions{gap:10px}
  .hero-actions .btn{flex:1 1 auto;justify-content:center}
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;justify-content:center;
    padding:0 18px;height:56px;font-size:15px;
  }
  .float-cta.is-visible{transform:translateY(0)}
  .footer-bottom{flex-direction:column;gap:6px}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .card:hover,.cross-card:hover,.status-item:hover,.btn:hover{transform:none}
  .float-cta{opacity:1;visibility:visible;transform:none}
}

/* roulang page: category4 */
:root{
  --primary:#1F6F7A;
  --primary-dark:#14515C;
  --primary-light:#E6F1F2;
  --primary-10:rgba(31,111,122,.10);
  --primary-20:rgba(31,111,122,.20);
  --accent:#C08A46;
  --accent-light:#F3E7D6;
  --bg:#FAFAF7;
  --bg-alt:#F3F5F4;
  --surface:#FFFFFF;
  --text:#16211F;
  --muted:#5A6B6B;
  --weak:#8A9896;
  --line:#E4E8E6;
  --success:#2F8F6B;
  --warn:#C25B3E;
  --footer-bg:#123037;
  --r-card:16px;
  --r-img:13px;
  --r-input:12px;
  --r-pill:999px;
  --sh-sm:0 1px 2px rgba(22,33,31,.05);
  --sh-md:0 8px 24px -12px rgba(20,80,90,.18);
  --sh-lg:0 24px 48px -24px rgba(20,80,90,.22);
  --ease:cubic-bezier(.2,.7,.3,1);
  --nav-h:76px;
}

*,*::before,*::after{box-sizing:border-box;}

html{scroll-behavior:smooth;}

body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--primary-dark);}
button{font-family:inherit;}
strong{font-weight:600;}
.num{font-variant-numeric:tabular-nums;}

:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}

/* ---------- Foundation 覆盖 ---------- */
.row{max-width:1200px;margin-left:auto;margin-right:auto;}
.row .columns,.row .column{padding-left:24px;padding-right:24px;}
h1,h2,h3,h4,h5,h6{font-family:inherit;color:var(--text);font-weight:600;line-height:1.25;margin:0;}
p{font-family:inherit;}

/* ---------- 容器与板块 ---------- */
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px;}
.section{padding:96px 0;}
.section--alt{background:var(--bg-alt);}
.section--tight{padding:72px 0;}
.section-head{max-width:760px;margin-bottom:48px;}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center;}
.section-head h2{font-size:clamp(1.5rem,2.6vw,2.125rem);letter-spacing:-.01em;}
.section-head p{margin-top:16px;color:var(--muted);font-size:16px;max-width:680px;}
.section-head--center p{margin-left:auto;margin-right:auto;}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:.08em;
  color:var(--primary);background:var(--primary-light);
  padding:6px 14px;border-radius:var(--r-pill);margin-bottom:18px;
}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(255,255,255,.14);
  border-bottom:1px solid rgba(255,255,255,.28);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:0 6px 20px -14px rgba(20,80,90,.35);
  transition:background .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.site-header.is-solid{
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);
  box-shadow:var(--sh-md);
}
.nav-row{display:flex;align-items:center;min-height:var(--nav-h);}
.nav-brand-col{display:flex;align-items:center;}
.nav-main-col{display:flex;align-items:center;justify-content:flex-end;gap:20px;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-weight:700;font-size:17px;letter-spacing:-.01em;white-space:nowrap;}
.brand:hover{color:var(--primary);}
.brand-mark{
  width:26px;height:26px;border-radius:8px;flex:0 0 26px;
  background:linear-gradient(135deg,var(--primary) 0%,#2E8C93 55%,var(--accent) 100%);
  position:relative;
}
.brand-mark::after{
  content:"";position:absolute;inset:7px;border:1.5px solid rgba(255,255,255,.85);border-radius:3px;
}
.nav-links{display:flex;align-items:center;gap:4px;}
.nav-links a{
  position:relative;display:inline-block;padding:8px 12px;font-size:15px;color:var(--text);
  border-radius:10px;white-space:nowrap;
}
.nav-links a:hover{color:var(--primary);background:var(--primary-10);}
.nav-links a.is-active{color:var(--primary);font-weight:600;}
.nav-links a.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--primary);border-radius:2px;
}
.nav-actions{display:flex;align-items:center;gap:12px;}
.nav-icon-btn{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--line);
  background:rgba(255,255,255,.6);color:var(--text);cursor:pointer;
  display:inline-flex;align-items:center;justify-content:center;
  transition:all .2s var(--ease);
}
.nav-icon-btn:hover{color:var(--primary);border-color:var(--primary-20);background:var(--primary-light);}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
  background:rgba(255,255,255,.7);color:var(--text);cursor:pointer;
  align-items:center;justify-content:center;font-size:16px;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-pill);border:1.5px solid transparent;
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  transition:all .22s var(--ease);white-space:nowrap;
}
.btn--primary{background:var(--primary);color:#fff;box-shadow:var(--sh-sm);}
.btn--primary:hover{background:var(--primary-dark);color:#fff;box-shadow:var(--sh-lg);transform:translateY(-1px);}
.btn--primary:active{transform:translateY(0);}
.btn--outline{border-color:var(--primary);color:var(--primary);background:transparent;}
.btn--outline:hover{background:var(--primary-light);color:var(--primary-dark);}
.btn--ghost{border-color:rgba(31,111,122,.35);color:var(--primary-dark);background:rgba(255,255,255,.55);}
.btn--ghost:hover{background:#fff;border-color:var(--primary);color:var(--primary);}
.btn--sm{padding:10px 20px;font-size:14px;}
.btn--lg{padding:16px 34px;font-size:16px;}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;
  padding:calc(var(--nav-h) + 76px) 0 84px;
  background-color:var(--bg);
  background-image:linear-gradient(180deg,rgba(250,250,247,.86) 0%,rgba(250,250,247,.92) 60%,var(--bg) 100%),url('/assets/images/backpic/back-2.webp');
  background-size:cover,cover;
  background-position:center,center;
  overflow:hidden;
}
.page-hero__pattern{
  position:absolute;inset:0;pointer-events:none;opacity:.05;
  background-image:linear-gradient(90deg,rgba(31,111,122,.9) 1px,transparent 1px);
  background-size:56px 56px;
}
.page-hero__inner{position:relative;max-width:800px;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:20px;}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb span.sep{color:var(--weak);}
.breadcrumb .current{color:var(--primary);font-weight:600;}
.page-hero h1{
  font-size:clamp(1.85rem,3.8vw,2.9rem);
  letter-spacing:-.015em;font-weight:700;margin:16px 0 0;
}
.page-hero__lead{margin-top:20px;font-size:17px;color:var(--muted);max-width:680px;line-height:1.85;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:12px;margin-top:36px;padding-top:24px;border-top:1px solid var(--line);}
.hero-tags li{
  display:inline-flex;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);
}
.hero-tags li i{color:var(--accent);font-size:12px;}

/* ---------- 卡片通用 ---------- */
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-md);padding:26px;height:100%;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);border-color:var(--primary-20);}
.card h3{font-size:1.125rem;margin-bottom:12px;}
.card p{color:var(--muted);font-size:15px;line-height:1.8;}
.card-icon{
  width:44px;height:44px;border-radius:12px;background:var(--primary-light);color:var(--primary);
  display:inline-flex;align-items:center;justify-content:center;font-size:18px;margin-bottom:18px;
}
.chip{
  display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:var(--r-pill);
  background:var(--primary-light);color:var(--primary);font-size:12px;font-weight:600;letter-spacing:.02em;
}
.chip--accent{background:var(--accent-light);color:#8A5E22;}

/* ---------- 解答范围网格 ---------- */
.scope-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;}
.scope-grid .card:nth-child(1){grid-column:span 7;}
.scope-grid .card:nth-child(2){grid-column:span 5;}
.scope-grid .card:nth-child(3){grid-column:span 5;}
.scope-grid .card:nth-child(4){grid-column:span 7;}
.scope-card--wide{background:linear-gradient(160deg,#F7FBFB 0%,#FFFFFF 62%);}
.scope-card ul{margin-top:16px;display:grid;gap:10px;}
.scope-card ul li{position:relative;padding-left:20px;font-size:14.5px;color:var(--muted);}
.scope-card ul li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;
  background:var(--primary-20);border:2px solid var(--primary);
}

/* ---------- 对比表 ---------- */
.table-shell{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-md);overflow:hidden;
}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;}
table.cmp{width:100%;min-width:760px;border-collapse:collapse;font-size:15px;}
table.cmp caption{
  text-align:left;padding:20px 26px 0;color:var(--muted);font-size:13.5px;caption-side:top;
}
table.cmp thead th{
  background:var(--primary);color:#fff;font-weight:600;font-size:14.5px;
  text-align:left;padding:16px 22px;letter-spacing:.02em;
}
table.cmp thead th:first-child{background:var(--primary-dark);}
table.cmp tbody th{
  text-align:left;font-weight:600;color:var(--text);padding:16px 22px;
  background:#F7FAFA;border-bottom:1px solid var(--line);white-space:nowrap;
}
table.cmp tbody td{
  padding:16px 22px;color:var(--muted);border-bottom:1px solid var(--line);vertical-align:top;line-height:1.7;
}
table.cmp tbody tr:nth-child(even) td{background:#FBFCFC;}
table.cmp tbody tr:last-child th,table.cmp tbody tr:last-child td{border-bottom:0;}
.table-note{padding:18px 26px 22px;font-size:13.5px;color:var(--weak);border-top:1px solid var(--line);background:#FBFCFC;}

/* ---------- 流程步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step;}
.step{
  position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px 24px;box-shadow:var(--sh-sm);transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--sh-md);}
.step__num{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:50%;background:var(--accent-light);color:#8A5E22;
  font-weight:700;font-size:15px;font-variant-numeric:tabular-nums;margin-bottom:18px;
}
.step h3{font-size:1.05rem;margin-bottom:10px;}
.step p{font-size:14.5px;color:var(--muted);}

/* ---------- FAQ ---------- */
.faq-list{max-width:880px;margin:0 auto;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:first-child{border-top:1px solid var(--line);}
.faq-item summary{
  position:relative;list-style:none;cursor:pointer;
  padding:22px 52px 22px 0;font-size:17px;font-weight:600;color:var(--text);
  transition:color .2s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--primary);}
.faq-icon{
  position:absolute;right:10px;top:50%;width:16px;height:16px;transform:translateY(-50%);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--primary);border-radius:2px;
  transition:transform .25s var(--ease),opacity .25s var(--ease);
}
.faq-icon::before{left:0;top:7px;width:16px;height:2px;}
.faq-icon::after{left:7px;top:0;width:2px;height:16px;}
.faq-item[open] .faq-icon::after{transform:rotate(90deg);opacity:0;}
.faq-body{padding:0 52px 24px 0;color:var(--muted);font-size:15px;line-height:1.85;}

/* ---------- 交叉链接 ---------- */
.cross-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.cross-card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-md);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.cross-card:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);border-color:var(--primary-20);}
.cross-card__media{position:relative;aspect-ratio:16/9;background:var(--primary-light);overflow:hidden;}
.cross-card__media img{width:100%;height:100%;object-fit:cover;}
.cross-card__body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.cross-card__body h3{font-size:1.05rem;}
.cross-card__body p{font-size:14.5px;color:var(--muted);flex:1;}
.cross-card__link{font-size:14px;font-weight:600;color:var(--primary);display:inline-flex;align-items:center;gap:6px;}
.cross-card:hover .cross-card__link{color:var(--primary-dark);}

/* ---------- CTA 带 ---------- */
.cta-band{
  background:linear-gradient(120deg,rgba(31,111,122,.10) 0%,rgba(31,111,122,.03) 55%,rgba(192,138,70,.10) 100%);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:64px 0;
}
.cta-band__inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;}
.cta-band h2{font-size:clamp(1.35rem,2.4vw,1.75rem);}
.cta-band p{margin-top:10px;color:var(--muted);font-size:15px;max-width:560px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--footer-bg);color:#D6E4E4;padding:72px 0 0;font-size:14.5px;}
.footer-grid{padding-bottom:48px;}
.site-footer h4{color:#fff;font-size:14px;letter-spacing:.06em;margin-bottom:18px;font-weight:600;}
.footer-brand{
  display:inline-flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:16.5px;margin-bottom:16px;
}
.footer-brand:hover{color:#fff;}
.footer-brand .brand-mark{background:linear-gradient(135deg,#2E8C93 0%,#1F6F7A 60%,var(--accent) 100%);}
.site-footer p{color:#A9C0C1;line-height:1.85;}
.footer-links,.footer-contact{display:grid;gap:12px;}
.footer-links a{color:#BFD4D5;}
.footer-links a:hover{color:#fff;}
.footer-contact li{display:flex;align-items:flex-start;gap:10px;color:#A9C0C1;}
.footer-contact li i{color:var(--accent);margin-top:5px;font-size:13px;}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  border-top:1px solid rgba(255,255,255,.12);padding:22px 0 26px;
  color:#8FA9AA;font-size:13.5px;
}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:24px;bottom:28px;z-index:90;
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 24px;border-radius:var(--r-pill);
  background:var(--primary);color:#fff;font-size:15px;font-weight:600;
  box-shadow:0 18px 36px -18px rgba(20,80,90,.55);
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity .28s var(--ease),transform .28s var(--ease),background .2s var(--ease);
}
.float-cta:hover{background:var(--primary-dark);color:#fff;}
.float-cta.is-visible{opacity:1;transform:translateY(0);pointer-events:auto;}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .row .columns,.row .column{padding-left:20px;padding-right:20px;}
  .container{padding-left:20px;padding-right:20px;}
  .section{padding:80px 0;}
  .nav-toggle{display:inline-flex;}
  .nav-icon-btn{display:none;}
  .nav-main-col{gap:10px;}
  .nav-links{
    position:fixed;left:0;right:0;top:0;bottom:0;z-index:95;
    display:flex;flex-direction:column;align-items:stretch;gap:0;
    background:var(--bg);padding:calc(var(--nav-h) + 20px) 20px 40px;
    overflow-y:auto;opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
  }
  .nav-links a{
    display:flex;align-items:center;height:52px;padding:0 4px;font-size:16px;
    border-bottom:1px solid var(--line);border-radius:0;
  }
  .nav-links a:hover{background:transparent;color:var(--primary);}
  .nav-links a.is-active::after{display:none;}
  .nav-open .nav-links{opacity:1;visibility:visible;transform:translateY(0);}
  .steps{grid-template-columns:repeat(2,1fr);}
  .cross-grid{grid-template-columns:1fr;gap:20px;}
  .scope-grid .card:nth-child(1),
  .scope-grid .card:nth-child(2),
  .scope-grid .card:nth-child(3),
  .scope-grid .card:nth-child(4){grid-column:span 12;}
}

@media (max-width:639px){
  .section{padding:64px 0;}
  .section--tight{padding:56px 0;}
  .section-head{margin-bottom:32px;}
  .page-hero{padding:calc(var(--nav-h) + 48px) 0 60px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .hero-tags{gap:10px 18px;}
  .steps{grid-template-columns:1fr;}
  .card{padding:22px;}
  .cta-band{padding:48px 0;}
  .cta-band__inner{flex-direction:column;align-items:flex-start;}
  .site-footer{padding-top:56px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .float-cta{
    left:0;right:0;bottom:0;width:100%;height:56px;border-radius:0;
    justify-content:center;padding:0;font-size:15px;
    transform:translateY(100%);
    box-shadow:0 -10px 24px -18px rgba(20,80,90,.6);
  }
  .float-cta.is-visible{transform:translateY(0);}
  body{padding-bottom:56px;}
  .faq-item summary{padding-right:44px;font-size:16px;}
  .faq-body{padding-right:20px;font-size:14.5px;}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    transition-duration:.001ms !important;
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
  }
  .card:hover,.step:hover,.cross-card:hover,.btn--primary:hover{transform:none;}
}