/* roulang page: index */
/* ============================================================
   设计变量
   ============================================================ */
:root{
  --brand:#2D77B8;
  --brand-dark:#1B4F7A;
  --brand-light:#E8F1F9;
  --brand-soft:#F3F8FC;
  --accent:#F2A03D;
  --accent-dark:#D98A24;
  --ok:#3FBFA0;
  --warn:#D9634F;

  --bg:#F4F7FA;
  --bg-alt:#FAFCFE;
  --surface:#FFFFFF;
  --line:#E3EBF3;

  --text:#1E2E3E;
  --text-mid:#3C5468;
  --text-weak:#5C7288;
  --text-faint:#8A9CAF;

  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --r-pill:999px;

  --sh-1:0 1px 2px rgba(18,52,86,.06), 0 8px 24px rgba(18,52,86,.08);
  --sh-2:0 14px 32px rgba(18,52,86,.12);

  --side:236px;
  --ease:cubic-bezier(.33,.6,.4,1);
}

/* ============================================================
   基础 reset / base
   ============================================================ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--brand-dark);text-decoration:underline;}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
  border-radius:6px;
}
button{background:none;border:0;color:inherit;font-family:inherit;cursor:pointer;padding:0;}
h1,h2,h3,h4{margin:0 0 .6em;color:var(--brand-dark);font-weight:600;line-height:1.3;letter-spacing:.005em;}
h1{font-size:clamp(30px,4vw,44px);line-height:1.25;}
h2{font-size:clamp(23px,2.5vw,28px);}
h3{font-size:19px;}
h4{font-size:16px;}
p{margin:0 0 1em;color:var(--text-mid);}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
figure{margin:0;}
strong{font-weight:600;color:var(--brand-dark);}
hr{border:0;border-top:1px solid var(--line);margin:32px 0;}

/* 覆盖 Foundation 默认色 */
body,.grid-x,.cell{font-family:inherit;}
.reveal,.accordion,.accordion-item,.accordion-title,.accordion-content{background:transparent;}
.accordion-title{font-size:16px;color:var(--text);}
.accordion-content{color:var(--text-mid);}
label{font-size:14px;color:var(--text-mid);font-weight:500;}

/* ============================================================
   布局骨架
   ============================================================ */
.main-area{
  margin-left:var(--side);
  min-height:100vh;
  display:flex;
  flex-direction:column;
  background:var(--bg);
}
.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:0 40px;
}
.section{padding:88px 0;}
.section--tight{padding:64px 0;}
.section--alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section--band{background:var(--brand-light);border-top:1px solid #D7E6F3;border-bottom:1px solid #D7E6F3;}

.section-head{max-width:780px;margin-bottom:48px;}
.section-head .eyebrow{
  display:inline-block;
  font-size:13px;letter-spacing:.06em;color:var(--brand);
  background:var(--brand-light);
  border-radius:var(--r-pill);
  padding:5px 14px;margin-bottom:16px;
}
.section-head p{font-size:16px;color:var(--text-weak);margin:12px 0 0;}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center;}

/* ============================================================
   顶部面包屑 / 栏目条
   ============================================================ */
.crumb-bar{
  position:sticky;top:0;z-index:40;
  height:56px;
  background:rgba(250,252,254,.94);
  backdrop-filter:saturate(150%) blur(6px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s var(--ease);
}
.crumb-bar.is-stuck{box-shadow:0 6px 18px rgba(18,52,86,.08);}
.crumb-bar .container{height:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;}
.crumb{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-faint);min-width:0;}
.crumb li{display:flex;align-items:center;gap:10px;white-space:nowrap;}
.crumb li::after{content:'/';color:#C3D3E2;}
.crumb li:last-child::after{display:none;}
.crumb a{color:var(--text-weak);}
.crumb a:hover{color:var(--brand);}
.crumb .is-current{color:var(--brand-dark);font-weight:600;}
.crumb-bar .bar-note{font-size:13px;color:var(--text-faint);white-space:nowrap;}

/* ============================================================
   左侧 App Shell 侧栏
   ============================================================ */
.side-nav{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--side);
  background:var(--bg-alt);
  border-right:1px solid var(--line);
  padding:22px 16px 20px;
  display:flex;
  flex-direction:column;
  gap:8px;
  overflow-y:auto;
  z-index:60;
}
.brand{
  display:flex;align-items:center;gap:11px;
  padding:6px 6px 18px;
  border-bottom:1px solid var(--line);
  margin-bottom:6px;
  color:var(--brand-dark);
}
.brand:hover{text-decoration:none;color:var(--brand-dark);}
.brand__mark{
  flex:0 0 42px;width:42px;height:42px;border-radius:13px;
  background:linear-gradient(150deg,var(--brand) 0%,#3E8AC9 100%);
  color:#fff;font-size:18px;font-weight:600;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 16px rgba(45,119,184,.28);
}
.brand-text{font-size:14px;font-weight:600;line-height:1.35;letter-spacing:.01em;}
.brand-text small{display:block;font-size:11px;font-weight:400;color:var(--text-faint);letter-spacing:.04em;margin-top:2px;}

.nav-group{display:flex;flex-direction:column;gap:3px;}
.nav-group__title{
  font-size:11px;letter-spacing:.1em;color:var(--text-faint);
  padding:14px 12px 6px;margin:0;font-weight:600;
}
.nav-item{
  position:relative;
  display:flex;align-items:center;gap:11px;
  padding:11px 12px;
  border-radius:var(--r-btn);
  font-size:14px;line-height:1.4;color:var(--text-weak);
  transition:background .18s var(--ease),color .18s var(--ease);
}
.nav-item i{flex:0 0 20px;text-align:center;font-size:14px;color:var(--brand);}
.nav-item .nav-text{min-width:0;}
.nav-item:hover{background:var(--brand-soft);color:var(--brand-dark);text-decoration:none;}
.nav-item.is-active{
  background:var(--brand-light);
  color:var(--brand-dark);
  font-weight:600;
}
.nav-item.is-active i{color:var(--brand-dark);}
.nav-item.is-active::before{
  content:'';position:absolute;left:-16px;top:9px;bottom:9px;width:3px;
  border-radius:0 3px 3px 0;background:var(--brand);
}
.side-foot{margin-top:auto;padding-top:18px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:8px;}
.side-foot .side-tip{font-size:12px;color:var(--text-faint);line-height:1.6;padding:0 4px;}

/* ============================================================
   按钮
   ============================================================ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;
  border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;
  cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
  text-align:center;white-space:nowrap;
}
.btn:hover{text-decoration:none;transform:translateY(-1px);}
.btn:active{transform:translateY(1px);box-shadow:none;}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.5;pointer-events:none;}
.btn--primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(45,119,184,.24);}
.btn--primary:hover{background:var(--brand-dark);color:#fff;box-shadow:0 10px 22px rgba(45,119,184,.28);}
.btn--accent{background:var(--accent);color:#3A2405;box-shadow:0 6px 16px rgba(242,160,61,.3);}
.btn--accent:hover{background:var(--accent-dark);color:#2E1C03;}
.btn--ghost{background:transparent;color:var(--brand);border-color:#BDD7EA;}
.btn--ghost:hover{background:var(--brand-light);color:var(--brand-dark);border-color:var(--brand);}
.btn--soft{background:var(--brand-light);color:var(--brand-dark);}
.btn--soft:hover{background:#DCEAF6;color:var(--brand-dark);}
.btn--sm{height:38px;padding:0 16px;font-size:14px;border-radius:9px;}
.btn--xs{height:32px;padding:0 13px;font-size:13px;border-radius:8px;}
.btn--block{width:100%;}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);}
.link-more:hover{text-decoration:none;color:var(--brand-dark);gap:9px;transition:gap .18s var(--ease);}

/* ============================================================
   标签 / 徽章
   ============================================================ */
.tag{
  display:inline-flex;align-items:center;
  height:26px;padding:0 11px;
  border-radius:var(--r-pill);
  background:var(--brand-light);
  color:var(--brand-dark);
  font-size:12.5px;font-weight:600;letter-spacing:.01em;
  white-space:nowrap;
}
.tag--accent{background:#FDF0DD;color:#9A5F14;}
.tag--ok{background:#E4F6F1;color:#227A65;}
.tag--line{background:#fff;border:1px solid var(--line);color:var(--text-weak);font-weight:500;}

/* ============================================================
   卡片通用
   ============================================================ */
.card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease);
  height:100%;
  display:flex;flex-direction:column;
  overflow:hidden;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.card__media{
  position:relative;width:100%;aspect-ratio:16/9;overflow:hidden;
  background:var(--brand-light);
}
.card__media img{width:100%;height:100%;object-fit:cover;border-radius:0;}
.card__body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card__body h3{font-size:18px;margin:0;}
.card__body p{font-size:14.5px;color:var(--text-weak);margin:0;}
.card__foot{margin-top:auto;padding-top:12px;display:flex;align-items:center;justify-content:space-between;gap:10px;border-top:1px solid var(--line);font-size:13px;color:var(--text-faint);}

/* ============================================================
   Hero
   ============================================================ */
.hero{
  position:relative;
  background:linear-gradient(180deg,#FAFCFE 0%,#F1F6FB 100%);
  border-bottom:1px solid var(--line);
  padding:72px 0 80px;
  overflow:hidden;
}
.hero::before{
  content:'';position:absolute;right:-120px;top:-140px;width:520px;height:520px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(45,119,184,.10) 0%,rgba(45,119,184,0) 68%);
  pointer-events:none;
}
.hero__copy{position:relative;z-index:2;padding-right:24px;}
.hero__eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--brand-dark);
  background:#fff;border:1px solid var(--line);
  border-radius:var(--r-pill);padding:6px 15px;margin-bottom:20px;
  box-shadow:0 1px 2px rgba(18,52,86,.05);
}
.hero__eyebrow i{color:var(--accent);font-size:12px;}
.hero h1{margin-bottom:18px;max-width:15em;}
.hero__sub{
  font-size:17px;line-height:1.8;color:var(--text-weak);
  max-width:620px;margin-bottom:30px;
}
.hero__actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:38px;}
.hero__stats{
  display:flex;flex-wrap:wrap;gap:36px;
  padding-top:26px;border-top:1px solid var(--line);
  max-width:620px;
}
.hero__stats li{min-width:86px;}
.hero__stats strong{
  display:block;font-size:26px;font-weight:600;color:var(--accent-dark);
  line-height:1.2;letter-spacing:.01em;
}
.hero__stats span{display:block;font-size:13px;color:var(--text-faint);margin-top:2px;}

.hero__visual{position:relative;min-height:400px;display:flex;align-items:center;justify-content:center;}
.hero__bg{
  position:absolute;inset:0;
  border-radius:18px;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  box-shadow:var(--sh-1);
}
.hero__bg::after{
  content:'';position:absolute;inset:0;border-radius:18px;
  background:linear-gradient(155deg,rgba(27,79,122,.58) 0%,rgba(45,119,184,.26) 62%,rgba(255,255,255,.06) 100%);
}
.hero__stack{
  position:relative;z-index:3;
  width:min(320px,86%);
  margin-left:12px;
  margin-top:24px;
}
.hero__stack::before{
  content:'';position:absolute;left:-34px;top:-30px;right:22px;bottom:26px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);opacity:.72;
}
.login-preview{
  position:relative;z-index:2;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-2);
  padding:20px 20px 18px;
}
.lp__head{
  display:flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand-dark);margin-bottom:16px;
}
.lp__dot{width:9px;height:9px;border-radius:50%;background:var(--ok);}
.lp__field{
  border:1px solid var(--line);border-radius:var(--r-btn);
  padding:10px 13px;margin-bottom:10px;background:var(--brand-soft);
}
.lp__label{display:block;font-size:11px;color:var(--text-faint);letter-spacing:.05em;margin-bottom:2px;}
.lp__value{display:block;font-size:14px;color:var(--text-mid);}
.lp__check{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--text-weak);margin:14px 0 16px;}
.lp__box{
  width:15px;height:15px;border-radius:4px;border:1px solid #BFD4E6;background:var(--brand-light);
  position:relative;flex:0 0 15px;
}
.lp__box::after{
  content:'';position:absolute;left:4px;top:1px;width:4px;height:8px;
  border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);transform:rotate(42deg);
}
.lp__btn{
  height:42px;border-radius:var(--r-btn);
  background:var(--accent);color:#3A2405;
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:600;
  box-shadow:0 6px 16px rgba(242,160,61,.3);
}
.lp__foot{margin-top:14px;font-size:12px;color:var(--text-faint);text-align:center;}

/* ============================================================
   机制说明区（编号图文交错）
   ============================================================ */
.mech-row{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:48px;
  align-items:center;
  padding:44px 0;
  border-bottom:1px dashed var(--line);
}
.mech-row:last-child{border-bottom:0;padding-bottom:0;}
.mech-row:first-child{padding-top:0;}
.mech-row__text{grid-column:span 7;}
.mech-row__media{grid-column:span 5;}
.mech-row--flip .mech-row__text{grid-column:5 / span 7;order:2;}
.mech-row--flip .mech-row__media{grid-column:1 / span 4;order:1;}
.mech-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:12px;
  background:var(--brand-light);color:var(--brand-dark);
  font-size:16px;font-weight:600;letter-spacing:.02em;
  margin-bottom:16px;
}
.mech-row__text h3{font-size:22px;margin-bottom:10px;}
.mech-row__text > p{font-size:15.5px;color:var(--text-weak);max-width:640px;}
.ticks{margin-top:18px;display:flex;flex-direction:column;gap:10px;}
.ticks li{position:relative;padding-left:26px;font-size:14.5px;color:var(--text-mid);line-height:1.7;}
.ticks li::before{
  content:'';position:absolute;left:0;top:7px;
  width:15px;height:15px;border-radius:50%;
  background:var(--brand-light);
}
.ticks li::after{
  content:'';position:absolute;left:5px;top:10px;
  width:4px;height:8px;border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);
  transform:rotate(42deg);
}
.mech-media{
  position:relative;border-radius:var(--r-img);overflow:hidden;
  aspect-ratio:4/3;background:var(--brand-light);
  border:1px solid var(--line);box-shadow:var(--sh-1);
}
.mech-media img{width:100%;height:100%;object-fit:cover;}

/* ============================================================
   权益预览横向卡片
   ============================================================ */
.rail-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;flex-wrap:wrap;}
.rail{
  display:flex;gap:20px;
  overflow-x:auto;
  padding:6px 2px 18px;
  scroll-snap-type:x proximity;
  -webkit-overflow-scrolling:touch;
}
.rail::-webkit-scrollbar{height:6px;}
.rail::-webkit-scrollbar-thumb{background:#CFE0EE;border-radius:99px;}
.rail::-webkit-scrollbar-track{background:transparent;}
.rail .card{flex:0 0 292px;scroll-snap-align:start;}
.rail-dots{display:flex;gap:7px;align-items:center;}
.rail-dots span{width:26px;height:4px;border-radius:99px;background:#D8E6F1;}
.rail-dots span.is-on{background:var(--brand);width:40px;}

/* ============================================================
   流程进度区
   ============================================================ */
.flow{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:0;
  margin-top:16px;
}
.flow__step{
  position:relative;
  padding:0 26px 0 0;
}
.flow__top{display:flex;align-items:center;margin-bottom:20px;}
.flow__num{
  flex:0 0 42px;width:42px;height:42px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:600;
  background:#fff;border:2px solid #CBDCEC;color:var(--text-faint);
  position:relative;z-index:2;
}
.flow__line{
  flex:1;height:2px;background:#CFE0EE;margin-left:8px;border-radius:2px;
}
.flow__step:last-child .flow__line{display:none;}
.flow__step h3{font-size:17px;margin-bottom:8px;color:var(--brand-dark);}
.flow__step p{font-size:14px;color:var(--text-weak);margin:0;padding-right:12px;}
.flow__step.is-done .flow__num{background:var(--ok);border-color:var(--ok);color:#fff;}
.flow__step.is-done .flow__line{background:var(--ok);}
.flow__step.is-current .flow__num{background:var(--accent);border-color:var(--accent);color:#3A2405;box-shadow:0 0 0 6px rgba(242,160,61,.18);}
.flow__step.is-current h3{color:var(--accent-dark);}

/* ============================================================
   CTA 条
   ============================================================ */
.cta-band{
  background:var(--brand-light);
  border:1px solid #D3E4F2;
  border-radius:18px;
  padding:44px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:36px;
}
.cta-band__text h2{margin-bottom:8px;}
.cta-band__text p{font-size:15px;color:var(--text-weak);margin:0;max-width:640px;}
.cta-band__act{flex:0 0 auto;display:flex;flex-direction:column;align-items:flex-end;gap:8px;}
.cta-band__act small{font-size:12.5px;color:var(--text-faint);}

/* ============================================================
   资讯列表（CMS）
   ============================================================ */
.filter-bar{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:30px;}
.filter-bar span{
  display:inline-flex;align-items:center;
  height:34px;padding:0 15px;border-radius:var(--r-pill);
  background:#fff;border:1px solid var(--line);
  font-size:13.5px;color:var(--text-weak);cursor:default;
}
.filter-bar span.is-on{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600;}

.news-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  height:100%;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease);
  overflow:hidden;
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.news-card__body{
  display:flex;flex-direction:column;gap:12px;
  height:100%;padding:24px 24px 22px;color:inherit;
}
.news-card__body:hover{text-decoration:none;color:inherit;}
.news-card__title{
  font-size:17.5px;line-height:1.5;margin:0;color:var(--brand-dark);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card__desc{
  font-size:14.5px;color:var(--text-weak);margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card__meta{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-faint);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.news-card__meta em{font-style:normal;color:var(--brand);font-weight:600;}

.empty-state{
  border:1px dashed #CBDCEC;border-radius:var(--r-card);
  background:var(--bg-alt);
  padding:56px 24px;text-align:center;
}
.empty-state i{font-size:26px;color:#A9C3DA;display:block;margin-bottom:12px;}
.empty-state p{color:var(--text-faint);font-size:14.5px;margin:0;}

/* ============================================================
   保障区（非对称 5/7）
   ============================================================ */
.assure{display:grid;grid-template-columns:repeat(12,1fr);gap:44px;align-items:start;}
.assure__left{grid-column:span 5;}
.assure__right{grid-column:span 7;display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
.metric{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:22px 20px;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease);
}
.metric:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.metric strong{display:block;font-size:28px;color:var(--accent-dark);line-height:1.2;margin-bottom:6px;}
.metric span{font-size:13.5px;color:var(--text-weak);display:block;line-height:1.6;}
.assure-list{margin-top:26px;display:flex;flex-direction:column;gap:14px;}
.assure-list li{
  display:flex;gap:12px;font-size:14.5px;color:var(--text-mid);line-height:1.7;
}
.assure-list i{color:var(--brand);font-size:14px;margin-top:5px;flex:0 0 16px;}

/* ============================================================
   FAQ（Foundation accordion 定制）
   ============================================================ */
.faq-wrap{max-width:900px;margin:0 auto;}
.accordion.faq{border:0;background:transparent;margin:0;}
.faq .accordion-item{
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:#fff;
  margin-bottom:12px;
  overflow:hidden;
  box-shadow:0 1px 2px rgba(18,52,86,.05);
  transition:box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.faq .accordion-item:hover{border-color:#CFE0EE;}
.faq .accordion-item.is-active{box-shadow:var(--sh-1);border-color:#CFE0EE;}
.faq .accordion-title{
  position:relative;
  border:0;
  padding:20px 60px 20px 24px;
  font-size:16px;font-weight:600;color:var(--text);
  background:#fff;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.faq .accordion-title:hover{background:var(--brand-soft);color:var(--brand-dark);}
.faq .accordion-title::after{
  content:'+';
  position:absolute;right:24px;top:50%;transform:translateY(-50%);
  font-size:20px;line-height:1;font-weight:400;color:var(--brand);
}
.faq .accordion-item.is-active .accordion-title{color:var(--brand-dark);}
.faq .accordion-item.is-active .accordion-title::after{content:'\2212';}
.faq .accordion-content{
  border:0;border-top:1px solid var(--line);
  padding:18px 24px 22px;background:#fff;
  font-size:15px;line-height:1.8;color:var(--text-weak);
}
.faq .accordion-content p{margin:0;font-size:15px;color:var(--text-weak);}

/* ============================================================
   联系表单
   ============================================================ */
.contact-wrap{
  display:grid;grid-template-columns:repeat(12,1fr);gap:44px;align-items:start;
}
.contact-info{grid-column:span 5;}
.contact-form{grid-column:span 7;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-1);padding:32px;}
.form-row{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.field{margin-bottom:18px;}
.field label{display:block;margin-bottom:7px;}
.field input,.field textarea,.field select{
  width:100%;
  font-family:inherit;font-size:15px;color:var(--text);
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-btn);
  padding:0 14px;height:44px;line-height:44px;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.field textarea{height:118px;line-height:1.7;padding:12px 14px;resize:vertical;}
.field input::placeholder,.field textarea::placeholder{color:#A9BACB;}
.field input:hover,.field textarea:hover{border-color:#CFE0EE;}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(45,119,184,.15);
}
.form-tip{
  margin-top:14px;font-size:13.5px;color:#227A65;
  background:#E4F6F1;border:1px solid #C6EBE2;border-radius:var(--r-btn);
  padding:10px 14px;
}
.form-note{font-size:12.5px;color:var(--text-faint);margin-top:12px;}

/* ============================================================
   页脚
   ============================================================ */
.site-foot{
  margin-top:auto;
  background:var(--bg-alt);
  border-top:1px solid var(--line);
  padding:60px 0 0;
}
.foot-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:36px;}
.foot-col--brand{grid-column:span 4;}
.foot-col{grid-column:span 2.5;}
.foot-col h4{
  font-size:13px;letter-spacing:.08em;color:var(--brand-dark);
  margin-bottom:16px;font-weight:600;
}
.foot-brand{display:flex;align-items:center;gap:11px;margin-bottom:16px;}
.foot-brand .brand__mark{flex:0 0 40px;width:40px;height:40px;border-radius:12px;font-size:17px;}
.foot-brand span{font-size:15px;font-weight:600;color:var(--brand-dark);}
.foot-col--brand p{font-size:14px;color:var(--text-weak);max-width:340px;line-height:1.8;}
.foot-list{display:flex;flex-direction:column;gap:11px;}
.foot-list a{font-size:14px;color:var(--text-weak);}
.foot-list a:hover{color:var(--brand);}
.foot-contact li{font-size:14px;color:var(--text-weak);display:flex;gap:10px;align-items:flex-start;margin-bottom:11px;line-height:1.65;}
.foot-contact i{color:var(--brand);font-size:14px;margin-top:5px;flex:0 0 16px;}
.foot-bar{
  margin-top:48px;border-top:1px solid var(--line);
  padding:22px 0;
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  font-size:13px;color:var(--text-faint);
}

/* ============================================================
   移动端顶栏 + 抽屉
   ============================================================ */
.mobile-topbar{
  display:none;
  position:sticky;top:0;z-index:70;
  height:60px;
  background:rgba(255,255,255,.96);
  backdrop-filter:saturate(150%) blur(6px);
  border-bottom:1px solid var(--line);
  padding:0 16px;
  align-items:center;justify-content:space-between;
  gap:12px;
}
.mobile-topbar .brand{padding:0;border:0;margin:0;gap:10px;}
.mobile-topbar .brand__mark{flex:0 0 36px;width:36px;height:36px;border-radius:11px;font-size:16px;}
.mobile-topbar .brand-text{font-size:14px;}
.hamburger{
  width:44px;height:44px;border-radius:11px;
  border:1px solid var(--line);background:#fff;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  transition:background .18s var(--ease),border-color .18s var(--ease);
}
.hamburger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--brand-dark);transition:transform .2s var(--ease),opacity .2s var(--ease);}
.hamburger:hover{background:var(--brand-soft);border-color:#CFE0EE;}
.hamburger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.hamburger[aria-expanded="true"] span:nth-child(2){opacity:0;}
.hamburger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.drawer{
  position:fixed;top:0;left:0;bottom:0;
  width:min(300px,84vw);
  background:#fff;
  border-right:1px solid var(--line);
  box-shadow:0 20px 50px rgba(18,52,86,.18);
  padding:22px 18px;
  transform:translateX(-104%);
  transition:transform .24s var(--ease);
  z-index:90;
  overflow-y:auto;
  display:flex;flex-direction:column;
}
.drawer.is-open{transform:translateX(0);}
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,45,70,.36);
  opacity:0;visibility:hidden;transition:opacity .24s var(--ease),visibility .24s var(--ease);
  z-index:80;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}

/* ============================================================
   响应式断点
   ============================================================ */
@media (min-width:992px) and (max-width:1199px){
  .side-nav{width:72px;padding:22px 12px;transition:width .2s var(--ease),box-shadow .2s var(--ease);overflow:hidden;}
  .side-nav .nav-text,.side-nav .brand-text,.side-nav .nav-group__title,.side-nav .side-tip{display:none;}
  .side-nav .nav-item{justify-content:center;padding:12px 0;}
  .side-nav .brand{justify-content:center;padding:6px 0 18px;}
  .side-nav .side-foot{align-items:center;}
  .side-nav:hover,.side-nav:focus-within{
    width:236px;padding:22px 16px;box-shadow:var(--sh-2);overflow-y:auto;
  }
  .side-nav:hover .nav-text,.side-nav:focus-within .nav-text{display:inline;}
  .side-nav:hover .brand-text,.side-nav:focus-within .brand-text{display:block;}
  .side-nav:hover .nav-group__title,.side-nav:focus-within .nav-group__title{display:block;}
  .side-nav:hover .nav-item,.side-nav:focus-within .nav-item{justify-content:flex-start;padding:11px 12px;}
  .main-area{margin-left:72px;}
  .container{padding:0 28px;}
  .section{padding:64px 0;}
  .mech-row{gap:32px;}
}

@media (max-width:991px){
  .side-nav{display:none;}
  .main-area{margin-left:0;}
  .mobile-topbar{display:flex;}
  .crumb-bar{top:60px;}
  .container{padding:0 28px;}
  .section{padding:64px 0;}
  .hero{padding:52px 0 60px;}
  .hero__copy{padding-right:0;}
  .hero__visual{min-height:340px;margin-top:38px;}
  .mech-row{grid-template-columns:1fr;gap:26px;padding:34px 0;}
  .mech-row__text{grid-column:1/-1;order:2;}
  .mech-row__media{grid-column:1/-1;order:1;}
  .mech-row--flip .mech-row__text{grid-column:1/-1;order:2;}
  .mech-row--flip .mech-row__media{grid-column:1/-1;order:1;}
  .flow{grid-template-columns:repeat(2,1fr);gap:32px 0;}
  .assure{grid-template-columns:1fr;gap:32px;}
  .assure__left,.assure__right{grid-column:1/-1;}
  .contact-wrap{grid-template-columns:1fr;gap:32px;}
  .contact-info,.contact-form{grid-column:1/-1;}
  .foot-col--brand{grid-column:span 12;}
  .foot-col{grid-column:span 6;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:36px 32px;gap:24px;}
  .cta-band__act{align-items:flex-start;}
}

@media (max-width:767px){
  .container{padding:0 18px;}
  .section{padding:48px 0;}
  .hero{padding:40px 0 48px;}
  .hero__sub{font-size:16px;}
  .hero__actions{gap:10px;}
  .hero__actions .btn{flex:1 1 100%;}
  .hero__stats{gap:20px 28px;}
  .hero__stats strong{font-size:22px;}
  .hero__visual{min-height:300px;}
  .hero__stack{width:min(280px,92%);margin-left:0;}
  .hero__stack::before{left:-18px;top:-18px;right:14px;bottom:16px;}
  .login-preview{padding:16px 16px 14px;}
  .section-head{margin-bottom:32px;}
  .flow{grid-template-columns:1fr;gap:0;}
  .flow__step{padding:0 0 26px;}
  .flow__top{margin-bottom:12px;}
  .flow__line{
    position:absolute;left:20px;top:44px;bottom:4px;width:2px;height:auto;
    flex:none;margin:0;
  }
  .flow__step:last-child .flow__line{display:none;}
  .flow__step{padding-left:0;}
  .assure__right{grid-template-columns:1fr;}
  .rail .card{flex:0 0 82%;}
  .cta-band{padding:28px 20px;border-radius:14px;}
  .contact-form{padding:22px 18px;}
  .form-row{grid-template-columns:1fr;gap:0;}
  .foot-col{grid-column:span 12;}
  .foot-bar{flex-direction:column;align-items:flex-start;gap:10px;}
  .crumb-bar .bar-note{display:none;}
  .faq .accordion-title{padding:17px 52px 17px 18px;font-size:15.5px;}
  .faq .accordion-content{padding:16px 18px 20px;}
}

@media (max-width:575px){
  h1{font-size:27px;}
  .hero__stats{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;width:100%;}
  .btn{width:100%;}
  .hero__actions .btn,.cta-band__act .btn{width:100%;}
  .cta-band__act{width:100%;}
  .hero__stack{width:100%;}
  .hero__stack::before{display:none;}
}

/* roulang page: article */
:root{
  --c-primary:#2D77B8;
  --c-primary-dark:#1B4F7A;
  --c-primary-soft:#E8F1F9;
  --c-accent:#F2A03D;
  --c-green:#3FBFA0;
  --c-warn:#D9634F;
  --bg-page:#F4F7FA;
  --bg-soft:#FAFCFE;
  --bg-card:#FFFFFF;
  --line:#E3EBF3;
  --t-strong:#16324C;
  --t-body:#3A4B5C;
  --t-muted:#7A8B9B;
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --sh-1:0 1px 2px rgba(18,52,86,.06);
  --sh-2:0 1px 2px rgba(18,52,86,.06), 0 8px 24px rgba(18,52,86,.08);
  --sh-3:0 14px 32px rgba(18,52,86,.12);
  --sidebar-w:236px;
  --ease:.18s ease-out;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-page);
  color:var(--t-body);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--c-primary);text-decoration:none;transition:color var(--ease),background-color var(--ease),border-color var(--ease)}
a:hover{color:var(--c-primary-dark);text-decoration:underline}
a:focus-visible,button:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px}
button{font:inherit;background:none;border:0;padding:0;cursor:pointer;color:inherit}
button:disabled{opacity:.5;cursor:not-allowed}
h1,h2,h3,h4{margin:0;color:var(--t-strong);font-weight:600;line-height:1.35}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
hr{border:0;border-top:1px solid var(--line);margin:0}
::selection{background:rgba(45,119,184,.16)}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 40px}

/* ===== 侧栏导航 ===== */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
  background:var(--bg-soft);border-right:1px solid var(--line);
  padding:22px 14px 30px;overflow-y:auto;z-index:40;
}
.sidebar::-webkit-scrollbar{width:6px}
.sidebar::-webkit-scrollbar-thumb{background:#D7E3EE;border-radius:6px}
.brand{display:flex;align-items:center;gap:10px;padding:2px 8px 18px;border-bottom:1px solid var(--line);margin-bottom:12px;color:var(--c-primary-dark)}
.brand:hover{text-decoration:none;color:var(--c-primary-dark)}
.brand__mark{
  width:38px;height:38px;flex:none;border-radius:11px;background:var(--c-primary);
  color:#fff;display:grid;place-items:center;font-size:17px;font-weight:700;letter-spacing:0;
}
.brand__text{display:flex;flex-direction:column;line-height:1.35;min-width:0}
.brand__text strong{font-size:14.5px;font-weight:700;color:var(--c-primary-dark);white-space:nowrap}
.brand__text em{font-style:normal;font-size:11.5px;color:var(--t-muted);white-space:nowrap}

.nav-group{display:flex;flex-direction:column;gap:2px}
.nav-group__title{
  font-size:12px;font-weight:600;color:var(--t-muted);letter-spacing:.08em;
  margin:16px 10px 6px;white-space:nowrap;
}
.nav-item{
  position:relative;display:flex;align-items:center;gap:10px;
  padding:10px 10px;border-radius:10px;font-size:14.5px;color:#3A4B5C;
  white-space:nowrap;transition:background-color var(--ease),color var(--ease);
}
.nav-item i{width:18px;text-align:center;font-size:14px;color:#93A7B9;flex:none}
.nav-item:hover{background:var(--c-primary-soft);color:var(--c-primary-dark);text-decoration:none}
.nav-item:hover i{color:var(--c-primary)}
.nav-item.is-active{background:var(--c-primary-soft);color:var(--c-primary-dark);font-weight:700}
.nav-item.is-active i{color:var(--c-primary)}
.nav-item.is-active::before{
  content:"";position:absolute;left:-14px;top:8px;bottom:8px;width:3px;
  border-radius:0 3px 3px 0;background:var(--c-primary);
}
.nav-hint{
  margin-top:18px;padding:12px 12px;border-radius:var(--r-card);
  background:#fff;border:1px solid var(--line);font-size:12.5px;color:var(--t-muted);line-height:1.6;
}

/* ===== 移动顶栏 / 抽屉 ===== */
.mobile-bar{display:none}
.off-canvas.position-left{
  width:268px;background:var(--bg-soft);border-right:1px solid var(--line);padding:20px 14px;
}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:8px}
.drawer-close{
  width:36px;height:36px;border-radius:10px;background:#fff;border:1px solid var(--line);
  display:grid;place-items:center;color:var(--t-muted);
}
.drawer-close:hover{color:var(--c-primary-dark);border-color:#CFE0EE}

/* ===== 主区 ===== */
.main-area{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column;background:var(--bg-page)}

.crumb-bar{
  position:sticky;top:0;z-index:25;height:56px;display:flex;align-items:center;
  background:#fff;border-bottom:1px solid var(--line);
}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--t-muted);min-width:0;flex-wrap:nowrap;overflow:hidden}
.crumbs a{color:var(--t-muted)}
.crumbs a:hover{color:var(--c-primary)}
.crumbs__sep{color:#C3D2DF}
.crumbs__cur{color:var(--c-primary-dark);font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* ===== 文章头 ===== */
.article-hero{position:relative;background:#fff;border-bottom:1px solid var(--line);overflow:hidden}
.article-hero::after{
  content:"";position:absolute;inset:0;z-index:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center right;opacity:.14;
}
.article-hero .container{position:relative;z-index:1;padding-top:46px;padding-bottom:38px}
.article-head{max-width:880px}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:999px;
  background:var(--c-primary-soft);color:var(--c-primary-dark);font-size:12.5px;font-weight:600;letter-spacing:.02em;
}
.page-title{
  font-size:clamp(30px,4vw,44px);line-height:1.25;font-weight:600;letter-spacing:-.01em;
  margin:16px 0 18px;color:#153450;
}
.article-meta{display:flex;align-items:center;gap:20px;flex-wrap:wrap;font-size:14px;color:var(--t-muted)}
.meta-item{display:inline-flex;align-items:center;gap:7px}
.meta-item i{color:#9AAFC2;font-size:13.5px}
.meta-item .dot{width:6px;height:6px;border-radius:50%;background:var(--c-green);display:inline-block}

/* ===== 布局 ===== */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:40px;padding:40px 0 72px}
@media (min-width:1200px){
  .article-layout{grid-template-columns:minmax(0,1fr) 300px;gap:48px}
}

/* ===== 正文卡 ===== */
.article-card{
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:40px;max-width:880px;
}
.post-tip{
  display:flex;gap:12px;align-items:flex-start;padding:14px 18px;border-radius:12px;
  background:var(--c-primary-soft);border:1px solid #D6E6F4;margin-bottom:32px;
}
.post-tip i{color:var(--c-primary);font-size:15px;margin-top:4px}
.post-tip p{font-size:14px;line-height:1.7;color:#2C4A66}

.article-body{font-size:16.5px;line-height:1.85;color:#33465A}
.article-body > *:first-child{margin-top:0}
.article-body p{margin:0 0 18px}
.article-body h2{
  font-size:26px;line-height:1.4;font-weight:600;color:var(--c-primary-dark);
  margin:48px 0 16px;padding-bottom:10px;border-bottom:1px solid var(--line);
}
.article-body h3{font-size:19.5px;font-weight:600;color:var(--t-strong);margin:34px 0 12px}
.article-body h4{font-size:17px;font-weight:600;color:var(--t-strong);margin:26px 0 10px}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:8px}
.article-body ul li{position:relative;padding-left:22px;margin-bottom:10px}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:12px;width:7px;height:7px;border-radius:50%;
  background:var(--c-primary-soft);border:2px solid var(--c-primary);
}
.article-body ol{counter-reset:li;padding-left:0}
.article-body ol li{position:relative;padding-left:34px;margin-bottom:10px;counter-increment:li}
.article-body ol li::before{
  content:counter(li,decimal-leading-zero);position:absolute;left:0;top:1px;
  font-size:13px;font-weight:700;color:var(--c-primary);background:var(--c-primary-soft);
  width:24px;height:24px;border-radius:7px;display:grid;place-items:center;
}
.article-body blockquote{
  margin:26px 0;padding:16px 22px;border-left:3px solid var(--c-primary);
  background:var(--c-primary-soft);border-radius:0 12px 12px 0;color:#26405A;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body table{width:100%;border-collapse:collapse;margin:26px 0;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--line);padding:11px 14px;text-align:left;vertical-align:top}
.article-body th{background:var(--c-primary-soft);color:var(--c-primary-dark);font-weight:600}
.article-body tbody tr:nth-child(even){background:#FBFDFF}
.article-body img{border-radius:var(--r-img);margin:26px auto;box-shadow:var(--sh-1)}
.article-body code{
  background:#EEF4FA;color:var(--c-primary-dark);padding:2px 7px;border-radius:6px;
  font-size:14.5px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
.article-body pre{
  background:#12293D;color:#E6F0F8;padding:18px 20px;border-radius:12px;overflow-x:auto;
  margin:24px 0;font-size:14.5px;line-height:1.7;
}
.article-body pre code{background:none;color:inherit;padding:0}
.article-body a{border-bottom:1px solid rgba(45,119,184,.35)}
.article-body a:hover{border-bottom-color:var(--c-primary-dark)}

.empty-state{
  text-align:center;padding:56px 20px;border:1px dashed #CFDEEB;border-radius:var(--r-card);background:var(--bg-soft);
}
.empty-state i{font-size:30px;color:#A9BCCD;display:block;margin-bottom:14px}
.empty-state p{font-size:16px;color:var(--t-muted);margin-bottom:20px}

/* ===== 侧栏 ===== */
.side-rail{display:flex;flex-direction:column;gap:20px}
@media (min-width:1200px){
  .side-rail{position:sticky;top:72px;align-self:start;max-height:calc(100vh - 96px);overflow-y:auto}
}
.rail-card{
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:20px 18px;
}
.rail-title{
  font-size:14px;font-weight:700;color:var(--c-primary-dark);letter-spacing:.02em;
  margin-bottom:12px;display:flex;align-items:center;gap:8px;
}
.rail-title i{color:var(--c-primary);font-size:13px}
.toc-list{display:flex;flex-direction:column;border-left:1px solid var(--line);margin-left:4px}
.toc-link{
  display:block;padding:7px 10px 7px 14px;font-size:13.5px;color:var(--t-muted);line-height:1.55;
  border-left:2px solid transparent;margin-left:-1px;
}
.toc-link:hover{color:var(--c-primary-dark);background:var(--bg-soft);text-decoration:none;border-left-color:var(--c-primary)}
.toc-link.is-sub{padding-left:26px;font-size:13px}
.rail-link{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 4px;font-size:14px;color:#3A4B5C;border-bottom:1px solid var(--line);
}
.rail-link:last-child{border-bottom:0}
.rail-link i{color:#B4C5D4;font-size:12px;transition:transform var(--ease),color var(--ease)}
.rail-link:hover{color:var(--c-primary-dark);text-decoration:none}
.rail-link:hover i{transform:translateX(3px);color:var(--c-primary)}

/* ===== 相关推荐 ===== */
.rel-section{padding:0 0 72px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:24px}
.section-head h2{font-size:26px;font-weight:600;color:var(--c-primary-dark)}
.section-head span{font-size:14px;color:var(--t-muted)}
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.rel-card{
  display:flex;flex-direction:column;background:var(--bg-card);border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh-1);overflow:hidden;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--sh-3);border-color:#D5E5F2;text-decoration:none}
.cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--c-primary-soft)}
.cover img{width:100%;height:100%;object-fit:cover;transition:transform .22s ease-out}
.rel-card:hover .cover img{transform:scale(1.03)}
.rel-body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.rel-tag{
  align-self:flex-start;height:24px;padding:0 10px;border-radius:999px;background:var(--c-primary-soft);
  color:var(--c-primary-dark);font-size:12px;font-weight:600;display:inline-flex;align-items:center;
}
.rel-body h3{font-size:16.5px;font-weight:600;color:var(--t-strong);line-height:1.5}
.rel-body p{font-size:14px;color:var(--t-muted);line-height:1.7}
.rel-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:#9AAFC2}

/* ===== 返回行 ===== */
.back-row{display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;padding:0 0 40px}
.back-link{display:inline-flex;align-items:center;gap:8px;font-size:14.5px;color:var(--c-primary)}
.back-link:hover{color:var(--c-primary-dark);text-decoration:underline}

/* ===== CTA 条 ===== */
.cta-strip{
  background:var(--c-primary-soft);border:1px solid #D6E6F4;border-radius:18px;
  padding:32px 36px;display:flex;align-items:center;justify-content:space-between;gap:28px;
  margin-bottom:80px;flex-wrap:wrap;
}
.cta-strip h2{font-size:22px;color:var(--c-primary-dark);margin-bottom:8px}
.cta-strip p{font-size:14.5px;color:#3E5E7C;max-width:620px}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background-color var(--ease),color var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn:active{transform:translateY(1px);box-shadow:none}
.btn--primary{background:var(--c-primary);color:#fff;box-shadow:0 6px 16px rgba(45,119,184,.22)}
.btn--primary:hover{background:#2669A4;color:#fff}
.btn--primary:active{background:#215C93}
.btn--ghost{background:#fff;color:var(--c-primary-dark);border-color:#BFD8EC}
.btn--ghost:hover{background:var(--c-primary-soft);color:var(--c-primary-dark);border-color:var(--c-primary)}
.btn--sm{height:38px;padding:0 16px;font-size:14px}

/* ===== 页脚 ===== */
.site-foot{margin-top:auto;background:var(--bg-soft);border-top:1px solid var(--line);padding:56px 0 0}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:40px}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.foot-brand .brand__mark{width:34px;height:34px;border-radius:10px;font-size:15px}
.foot-brand span:last-child{font-size:15px;font-weight:700;color:var(--c-primary-dark)}
.foot-col--brand p{font-size:14px;color:var(--t-muted);line-height:1.8;max-width:340px}
.foot-col h4{font-size:14px;color:var(--c-primary-dark);margin-bottom:14px;letter-spacing:.02em}
.foot-list{display:flex;flex-direction:column;gap:10px}
.foot-list a,.foot-contact li{font-size:14px;color:#4A5D70}
.foot-list a:hover{color:var(--c-primary-dark)}
.foot-contact{display:flex;flex-direction:column;gap:12px}
.foot-contact li{display:flex;gap:10px;align-items:flex-start;line-height:1.7}
.foot-contact i{color:var(--c-primary);margin-top:5px;font-size:13px}
.foot-bar{
  margin-top:44px;border-top:1px solid var(--line);padding:20px 0;
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:var(--t-muted);
}

/* ===== 响应式 ===== */
@media (min-width:992px) and (max-width:1199px){
  .sidebar{width:72px;padding:22px 10px 30px;transition:width var(--ease)}
  .sidebar:hover{width:236px;box-shadow:var(--sh-3)}
  .sidebar .brand__text,
  .sidebar .nav-text,
  .sidebar .nav-group__title,
  .sidebar .nav-hint{display:none}
  .sidebar:hover .brand__text{display:flex}
  .sidebar:hover .nav-text{display:inline}
  .sidebar:hover .nav-group__title{display:block}
  .sidebar:hover .nav-hint{display:block}
  .main-area{margin-left:72px}
  .container{padding:0 28px}
  .article-card{padding:32px}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .foot-grid{grid-template-columns:1.4fr 1fr 1.2fr;gap:32px}
  .foot-col--brand{grid-column:1 / -1}
}

@media (max-width:991px){
  .off-canvas.position-left{display:block}
  .sidebar{display:none}
  .mobile-bar{
    display:flex;align-items:center;gap:12px;position:sticky;top:0;z-index:50;
    height:60px;padding:0 18px;background:#fff;border-bottom:1px solid var(--line);
  }
  .mobile-bar__btn{
    width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;
    display:grid;place-items:center;color:var(--c-primary-dark);font-size:16px;
  }
  .mobile-bar__btn:hover{background:var(--c-primary-soft);border-color:#CFE0EE}
  .mobile-bar__brand{display:flex;align-items:center;gap:9px;color:var(--c-primary-dark);font-size:15px;font-weight:700}
  .mobile-bar__brand:hover{text-decoration:none;color:var(--c-primary-dark)}
  .mobile-bar__brand .brand__mark{width:32px;height:32px;border-radius:9px;font-size:14px}
  .main-area{margin-left:0}
  .container{padding:0 20px}
  .crumb-bar{top:60px;height:50px}
  .article-hero .container{padding-top:34px;padding-bottom:28px}
  .article-layout{padding:28px 0 56px;gap:32px}
  .article-card{padding:24px 20px}
  .cta-strip{padding:26px 22px;margin-bottom:56px}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:30px}
  .foot-col--brand{grid-column:1 / -1}
  .foot-col--brand p{max-width:none}
}

@media (max-width:767px){
  .article-body h2{font-size:22px;margin-top:38px}
  .article-body h3{font-size:18px}
  .article-body table{font-size:14px}
  .article-body th,.article-body td{padding:9px 10px}
  .rel-grid{grid-template-columns:1fr}
  .section-head{flex-direction:column;align-items:flex-start;gap:6px}
  .section-head h2{font-size:22px}
  .cta-strip h2{font-size:19px}
  .btn{width:100%}
  .cta-strip .btn,.back-row .btn{width:auto}
}

@media (max-width:575px){
  .container{padding:0 16px}
  .page-title{font-size:26px}
  .article-card{padding:20px 16px;border-radius:12px}
  .article-body{font-size:16px}
  .article-meta{gap:14px;font-size:13px}
  .site-foot{padding-top:40px}
  .foot-grid{grid-template-columns:1fr;gap:26px}
  .foot-bar{flex-direction:column;align-items:flex-start;gap:6px}
  .cta-strip{border-radius:14px;padding:22px 18px}
  .cta-strip .btn,.back-row .btn{width:100%}
}

/* roulang page: category1 */
:root{
  --c-primary:#2D77B8;
  --c-primary-dark:#1B4F7A;
  --c-primary-hover:#2568A2;
  --c-light:#E8F1F9;
  --c-accent:#F2A03D;
  --c-accent-hover:#DF8E28;
  --c-ok:#3FBFA0;
  --c-warn:#D9634F;
  --c-bg:#F4F7FA;
  --c-surface:#FFFFFF;
  --c-surface-alt:#FAFCFE;
  --c-line:#E3EBF3;
  --c-text:#1E2C3A;
  --c-text-2:#3C4E60;
  --c-muted:#66798C;
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --sh-1:0 1px 2px rgba(18,52,86,.06);
  --sh-2:0 1px 2px rgba(18,52,86,.06),0 8px 24px rgba(18,52,86,.08);
  --sh-3:0 14px 32px rgba(18,52,86,.12);
  --tr:200ms ease-out;
  --side-w:236px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  font-size:16px;line-height:1.75;color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5{color:var(--c-primary-dark);margin:0;font-weight:600;line-height:1.32;font-family:inherit;}
p{margin:0 0 1em;}
img{display:block;max-width:100%;height:auto;}
a{color:var(--c-primary);text-decoration:none;transition:color var(--tr);}
a:hover{color:var(--c-primary-dark);text-decoration:underline;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 40px;}

/* ===== 布局骨架 ===== */
.off-canvas-wrapper,.off-canvas-wrapper-inner{background:var(--c-bg);}
.off-canvas-content{background:var(--c-bg);box-shadow:none;min-height:100vh;}
.off-canvas{background:var(--c-surface-alt);border-right:1px solid var(--c-line);width:286px;padding:22px 16px 40px;}
.off-canvas .drawer-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:4px;}
.off-canvas .drawer-close{width:38px;height:38px;border-radius:var(--r-btn);border:1px solid var(--c-line);background:#fff;color:var(--c-primary-dark);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:background var(--tr),color var(--tr);}
.off-canvas .drawer-close:hover{background:var(--c-light);color:var(--c-primary-dark);}

.side-bar{
  position:fixed;top:0;left:0;bottom:0;width:var(--side-w);
  background:var(--c-surface-alt);
  border-right:1px solid var(--c-line);
  padding:22px 14px 32px;overflow-y:auto;z-index:70;
  transition:width var(--tr),box-shadow var(--tr);
}
.brand{display:flex;align-items:center;gap:10px;padding:6px 8px 18px;text-decoration:none;}
.brand:hover{text-decoration:none;}
.brand__mark{
  width:36px;height:36px;flex:0 0 36px;border-radius:10px;background:var(--c-primary);color:#fff;
  display:grid;place-items:center;font-size:17px;font-weight:700;letter-spacing:0;
}
.brand__text{font-size:15px;font-weight:600;color:var(--c-primary-dark);line-height:1.25;white-space:nowrap;}
.nav-group{display:block;}
.nav-group__title{font-size:12px;color:var(--c-muted);margin:20px 8px 8px;letter-spacing:.04em;}
.nav-item{
  display:flex;align-items:center;gap:10px;min-height:44px;padding:0 10px;margin-bottom:2px;
  border-radius:10px;border-left:3px solid transparent;
  color:var(--c-text-2);font-size:15px;text-decoration:none;
  transition:background var(--tr),color var(--tr),border-color var(--tr);
}
.nav-item:hover{background:var(--c-light);color:var(--c-primary-dark);text-decoration:none;}
.nav-item i{width:18px;text-align:center;color:var(--c-primary);font-size:15px;}
.nav-item.is-active{background:var(--c-light);color:var(--c-primary-dark);font-weight:600;border-left-color:var(--c-primary);}
.nav-text{white-space:nowrap;}

.app-main{min-height:100vh;margin-left:var(--side-w);display:flex;flex-direction:column;background:var(--c-bg);}
.page-main{flex:1 1 auto;}

/* ===== 顶部栏目条 ===== */
.top-bar-shell{
  position:sticky;top:0;z-index:60;height:56px;
  display:flex;align-items:center;
  background:rgba(255,255,255,.97);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow var(--tr);
}
.top-bar-shell.is-stuck{box-shadow:0 6px 18px rgba(18,52,86,.08);}
.top-bar-shell .container{display:flex;align-items:center;gap:14px;}
.menu-toggle{
  display:none;width:42px;height:42px;flex:0 0 42px;border-radius:var(--r-btn);
  border:1px solid var(--c-line);background:#fff;color:var(--c-primary-dark);
  align-items:center;justify-content:center;font-size:16px;cursor:pointer;
  transition:background var(--tr),border-color var(--tr);
}
.menu-toggle:hover{background:var(--c-light);border-color:#cfe0ef;}
.crumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--c-muted);flex:1 1 auto;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.crumb a{color:var(--c-muted);}
.crumb a:hover{color:var(--c-primary);text-decoration:none;}
.crumb .sep{color:#B7C6D4;}
.crumb .now{color:var(--c-primary-dark);font-weight:600;}
.top-bar-tag{display:inline-flex;align-items:center;gap:6px;height:30px;padding:0 12px;border-radius:999px;background:var(--c-light);color:var(--c-primary-dark);font-size:12.5px;font-weight:600;white-space:nowrap;}

/* ===== 横幅 ===== */
.page-banner{
  position:relative;overflow:hidden;min-height:300px;display:flex;align-items:center;
  background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
}
.page-banner::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(255,255,255,.96) 0%,rgba(255,255,255,.88) 46%,rgba(232,241,249,.72) 100%);}
.page-banner .container{position:relative;z-index:2;padding-top:48px;padding-bottom:48px;}
.page-banner h1{font-size:clamp(28px,3.6vw,42px);line-height:1.25;letter-spacing:.01em;max-width:780px;}
.banner__sub{margin-top:16px;font-size:17px;color:var(--c-text-2);max-width:700px;line-height:1.75;}
.banner__tags{margin-top:24px;display:flex;flex-wrap:wrap;gap:10px;}

/* ===== 通用分节 ===== */
.section{padding:88px 0;}
.section--alt{background:var(--c-surface-alt);}
.section--light{background:var(--c-light);}
.section__head{max-width:780px;margin-bottom:40px;}
.section__head h2{font-size:clamp(22px,2.5vw,28px);}
.section__head .lead{margin-top:14px;color:var(--c-muted);font-size:16px;}
.section__head--center{margin-left:auto;margin-right:auto;text-align:center;}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  text-decoration:none;transition:background var(--tr),color var(--tr),border-color var(--tr),transform var(--tr),box-shadow var(--tr);
}
.btn:hover{text-decoration:none;transform:translateY(-1px);}
.btn:active{transform:translateY(1px);box-shadow:none;}
.btn--primary{background:var(--c-primary);color:#fff;box-shadow:var(--sh-1);}
.btn--primary:hover{background:var(--c-primary-hover);color:#fff;box-shadow:var(--sh-2);}
.btn--accent{background:var(--c-accent);color:#33220A;box-shadow:var(--sh-1);}
.btn--accent:hover{background:var(--c-accent-hover);color:#33220A;box-shadow:var(--sh-2);}
.btn--ghost{background:#fff;border-color:var(--c-primary);color:var(--c-primary);}
.btn--ghost:hover{background:var(--c-light);color:var(--c-primary-dark);}
.btn--soft{background:var(--c-light);color:var(--c-primary-dark);}
.btn--soft:hover{background:#D8E7F4;color:var(--c-primary-dark);}
.btn--sm{height:38px;padding:0 16px;font-size:14px;}
.btn[disabled],.btn.is-disabled{opacity:.5;pointer-events:none;}

/* ===== 标签与徽章 ===== */
.badge{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;background:var(--c-light);color:var(--c-primary-dark);font-size:12.5px;font-weight:600;letter-spacing:.01em;}

/* ===== 筛选条 ===== */
.filter-bar{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:30px;}
.filter-bar__label{font-size:14px;color:var(--c-muted);}
.chips{display:flex;gap:10px;flex-wrap:wrap;}
.chip{
  height:38px;padding:0 18px;border-radius:999px;border:1px solid var(--c-line);
  background:#fff;color:var(--c-text-2);font-size:14px;line-height:1;cursor:pointer;
  box-shadow:none;margin:0;transition:background var(--tr),border-color var(--tr),color var(--tr),transform var(--tr);
}
.chip:hover{border-color:var(--c-primary);color:var(--c-primary-dark);background:var(--c-light);transform:translateY(-1px);}
.chip:active{transform:translateY(0);}
.chip.is-on{background:var(--c-primary);border-color:var(--c-primary);color:#fff;font-weight:600;}
.chip.is-on:hover{background:var(--c-primary-hover);color:#fff;}

/* ===== 卡片网格 ===== */
.topic-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:26px;}
.topic-card{
  display:flex;flex-direction:column;overflow:hidden;background:#fff;
  border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-1);
  transition:transform var(--tr),box-shadow var(--tr),border-color var(--tr);
}
.topic-card:hover{transform:translateY(-2px);box-shadow:var(--sh-3);border-color:#CFE0EF;}
.topic-card__media{aspect-ratio:16/9;overflow:hidden;background:var(--c-light);}
.topic-card__media img{width:100%;height:100%;object-fit:cover;transition:transform 220ms ease-out;}
.topic-card:hover .topic-card__media img{transform:scale(1.03);}
.topic-card__body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1 1 auto;}
.topic-card__body h3{font-size:19px;}
.topic-card__body p{margin:0;color:var(--c-muted);font-size:15px;line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.topic-card__meta{margin-top:auto;padding-top:14px;border-top:1px solid var(--c-line);display:flex;justify-content:space-between;gap:12px;font-size:13px;color:var(--c-muted);}

/* ===== 不对称图文 ===== */
.split{display:grid;grid-template-columns:5fr 7fr;gap:52px;align-items:center;}
.split--reverse{grid-template-columns:7fr 5fr;}
.split__text h2{font-size:clamp(21px,2.3vw,26px);}
.split__text .lead{margin-top:14px;color:var(--c-muted);font-size:15.5px;}
.figure{border-radius:var(--r-card);overflow:hidden;border:1px solid var(--c-line);box-shadow:var(--sh-2);aspect-ratio:16/10;background:var(--c-light);}
.figure img{width:100%;height:100%;object-fit:cover;}

.check-list{margin-top:24px;}
.check-list li{display:flex;gap:12px;padding:14px 0;border-bottom:1px dashed var(--c-line);font-size:15.5px;color:var(--c-text-2);line-height:1.7;}
.check-list li:last-child{border-bottom:0;}
.check-list i{color:var(--c-ok);margin-top:6px;font-size:14px;}

.num-list{margin-top:10px;}
.num-list__item{display:grid;grid-template-columns:64px 1fr;gap:20px;padding:26px 0;border-top:1px solid var(--c-line);}
.num-list__item:last-child{border-bottom:1px solid var(--c-line);}
.num-list__no{font-size:22px;font-weight:700;color:var(--c-primary);font-variant-numeric:tabular-nums;line-height:1.2;}
.num-list__item h3{font-size:19px;margin-bottom:8px;}
.num-list__item p{margin:0;color:var(--c-muted);font-size:15px;}

/* ===== 问答速查 ===== */
.qa-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}
.qa-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);padding:26px;box-shadow:var(--sh-1);transition:transform var(--tr),box-shadow var(--tr);}
.qa-card:hover{transform:translateY(-2px);box-shadow:var(--sh-3);}
.qa-card h3{font-size:17px;display:flex;gap:10px;align-items:flex-start;}
.qa-card h3 i{color:var(--c-accent);margin-top:5px;font-size:15px;}
.qa-card p{margin:12px 0 0;color:var(--c-muted);font-size:15px;line-height:1.75;}

/* ===== 入口卡 ===== */
.entry-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.entry-card{display:flex;flex-direction:column;gap:12px;padding:28px;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-1);transition:transform var(--tr),box-shadow var(--tr),border-color var(--tr);}
.entry-card:hover{transform:translateY(-2px);box-shadow:var(--sh-3);border-color:#CFE0EF;}
.entry-card__icon{width:46px;height:46px;border-radius:12px;background:var(--c-light);color:var(--c-primary);display:grid;place-items:center;font-size:18px;}
.entry-card h3{font-size:18px;}
.entry-card p{margin:0;color:var(--c-muted);font-size:15px;line-height:1.7;}
.entry-card .entry-link{margin-top:auto;padding-top:12px;font-size:14px;font-weight:600;color:var(--c-primary);display:inline-flex;align-items:center;gap:6px;}
.entry-card .entry-link i{font-size:12px;transition:transform var(--tr);}
.entry-card:hover .entry-link i{transform:translateX(3px);}

/* ===== CTA 条 ===== */
.cta-band{
  background:var(--c-light);border:1px solid #D6E5F2;border-radius:var(--r-card);
  padding:40px 44px;display:flex;align-items:center;justify-content:space-between;
  gap:32px;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(20px,2.2vw,25px);}
.cta-band p{margin:12px 0 0;color:var(--c-text-2);font-size:15.5px;max-width:620px;}
.cta-band__action{display:flex;flex-direction:column;gap:10px;align-items:flex-start;}
.cta-band__note{font-size:13px;color:var(--c-muted);}

/* ===== 表单 ===== */
.form-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-2);padding:34px;}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field--full{grid-column:1 / -1;}
.field label{font-size:14px;font-weight:600;color:var(--c-text-2);}
.field input,.field select,.field textarea{
  width:100%;height:44px;padding:0 14px;margin:0;
  border:1px solid var(--c-line);border-radius:10px;background:#fff;
  font-size:15px;font-family:inherit;color:var(--c-text);box-shadow:none;
  transition:border-color var(--tr),box-shadow var(--tr);
}
.field textarea{height:auto;min-height:118px;padding:12px 14px;line-height:1.7;resize:vertical;}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(45,119,184,.18);}
.field .hint{font-size:13px;color:var(--c-muted);}
.form-foot{grid-column:1 / -1;display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:4px;}

/* ===== 页脚 ===== */
.site-foot{background:var(--c-surface-alt);border-top:1px solid var(--c-line);padding-top:60px;margin-top:auto;}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:44px;}
.foot-brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:600;color:var(--c-primary-dark);margin-bottom:14px;}
.foot-brand .brand__mark{width:34px;height:34px;flex:0 0 34px;font-size:16px;}
.foot-col--brand p{font-size:14.5px;color:var(--c-muted);max-width:360px;line-height:1.8;margin:0;}
.foot-col h4{font-size:15px;color:var(--c-primary-dark);margin-bottom:16px;}
.foot-list li{margin-bottom:10px;}
.foot-list a{font-size:14.5px;color:var(--c-muted);}
.foot-list a:hover{color:var(--c-primary);}
.foot-contact li{display:flex;gap:10px;font-size:14px;color:var(--c-muted);margin-bottom:12px;line-height:1.7;}
.foot-contact i{color:var(--c-primary);margin-top:5px;}
.foot-bar{border-top:1px solid var(--c-line);padding:20px 0;display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;font-size:13.5px;color:var(--c-muted);}

/* ===== 响应式 ===== */
@media (min-width:1200px){
  .app-main{margin-left:236px;}
}
@media (min-width:992px) and (max-width:1199px){
  :root{--side-w:72px;}
  .side-bar{width:72px;padding-left:10px;padding-right:10px;}
  .side-bar .brand{justify-content:center;padding-left:0;padding-right:0;}
  .side-bar .brand__text,
  .side-bar .nav-text,
  .side-bar .nav-group__title{display:none;}
  .side-bar .nav-item{justify-content:center;padding:0;border-left-width:3px;}
  .side-bar:hover{width:236px;box-shadow:var(--sh-3);padding-left:14px;padding-right:14px;}
  .side-bar:hover .brand{justify-content:flex-start;}
  .side-bar:hover .brand__text{display:inline;}
  .side-bar:hover .nav-text{display:inline;}
  .side-bar:hover .nav-group__title{display:block;}
  .side-bar:hover .nav-item{justify-content:flex-start;padding:0 10px;}
  .app-main{margin-left:72px;}
}
@media (max-width:991px){
  .side-bar{display:none;}
  .app-main{margin-left:0;}
  .menu-toggle{display:inline-flex;}
  .container{padding:0 28px;}
  .section{padding:64px 0;}
  .topic-grid{gap:22px;}
  .split{gap:34px;grid-template-columns:1fr;}
  .split--reverse{grid-template-columns:1fr;}
  .split--reverse .figure{order:-1;}
  .entry-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .section{padding:48px 0;}
  .page-banner{min-height:260px;}
  .page-banner .container{padding-top:36px;padding-bottom:36px;}
  .banner__sub{font-size:15.5px;}
  .topic-grid{grid-template-columns:1fr;}
  .qa-grid{grid-template-columns:1fr;}
  .entry-grid{grid-template-columns:1fr;}
  .cta-band{padding:28px 22px;border-radius:var(--r-card);}
  .form-card{padding:22px;}
  .form-grid{grid-template-columns:1fr;}
  .foot-grid{grid-template-columns:1fr;gap:26px;}
  .foot-bar{flex-direction:column;align-items:flex-start;}
  .num-list__item{grid-template-columns:48px 1fr;gap:14px;}
  .crumb{font-size:13px;}
  .top-bar-tag{display:none;}
}
@media (max-width:575px){
  h1{font-size:26px;}
  .section__head h2{font-size:21px;}
  .topic-card__body{padding:18px;}
  .btn{width:100%;}
  .cta-band__action{width:100%;}
  .cta-band__action .btn{width:100%;}
  .filter-bar{gap:10px;}
  .chip{height:36px;padding:0 15px;font-size:13.5px;}
}

/* roulang page: category2 */
:root{
  --blue:#2D77B8;
  --blue-deep:#1B4F7A;
  --blue-soft:#E8F1F9;
  --amber:#F2A03D;
  --green:#3FBFA0;
  --red:#D9634F;
  --bg:#F4F7FA;
  --card:#FFFFFF;
  --alt:#FAFCFE;
  --line:#E3EBF3;
  --text:#1D3145;
  --muted:#61798F;
  --r-lg:14px;
  --r-md:12px;
  --r-sm:10px;
  --sh-1:0 1px 2px rgba(18,52,86,.06),0 8px 24px rgba(18,52,86,.08);
  --sh-2:0 14px 32px rgba(18,52,86,.12);
  --shell:236px;
  --shell-mini:72px;
  --ease:180ms ease-out;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote{margin:0;}
ul,ol{padding:0;list-style:none;}
img{max-width:100%;display:block;}
a{color:var(--blue);text-decoration:none;transition:color var(--ease);}
a:hover{color:var(--blue-deep);text-decoration:underline;}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--blue);outline-offset:2px;}
button{font:inherit;}
table{border-collapse:collapse;}

/* ---------- 容器 ---------- */
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 40px;}
@media (max-width:1199px){.container{padding:0 28px;}}
@media (max-width:767px){.container{padding:0 18px;}}

/* ---------- 侧栏 App Shell ---------- */
.app-shell{
  position:fixed;top:0;left:0;bottom:0;width:var(--shell);
  background:#FFFFFF;border-right:1px solid var(--line);
  padding:22px 14px 18px;z-index:80;
  display:flex;flex-direction:column;
  overflow-y:auto;overflow-x:hidden;
  transition:width 200ms ease-out;
}
.brand{
  display:flex;align-items:center;gap:10px;
  padding:0 8px 18px;margin-bottom:4px;
  border-bottom:1px solid var(--line);
  color:var(--text);text-decoration:none;
}
.brand:hover{color:var(--blue-deep);text-decoration:none;}
.brand__mark{
  flex:0 0 auto;width:34px;height:34px;border-radius:10px;
  background:var(--blue);color:#FFFFFF;
  display:grid;place-items:center;font-size:17px;font-weight:700;
}
.brand__name{font-size:14.5px;font-weight:700;line-height:1.35;letter-spacing:.2px;}
.nav-group{margin-top:18px;}
.nav-group__title{
  font-size:12px;letter-spacing:1.2px;color:var(--muted);
  padding:0 12px;margin-bottom:8px;font-weight:600;
}
.nav-item{
  display:flex;align-items:center;gap:10px;
  padding:9px 12px;border-radius:10px;
  border-left:3px solid transparent;
  color:var(--text);font-size:14px;line-height:1.4;
  transition:background var(--ease),color var(--ease),border-color var(--ease);
}
.nav-item i{width:18px;flex:0 0 18px;text-align:center;font-size:15px;color:var(--blue);}
.nav-item:hover{background:var(--blue-soft);color:var(--blue-deep);text-decoration:none;}
.nav-item.is-active{
  background:var(--blue-soft);border-left-color:var(--blue);
  color:var(--blue-deep);font-weight:600;
}
.nav-item.is-active i{color:var(--blue-deep);}
.nav-text{white-space:nowrap;}
.shell-foot{margin-top:auto;padding:18px 12px 4px;border-top:1px solid var(--line);}
.shell-foot p{font-size:12.5px;color:var(--muted);line-height:1.7;}

/* ---------- 主区域 ---------- */
.site-main{margin-left:var(--shell);min-height:100vh;display:flex;flex-direction:column;}

/* ---------- 顶部条 ---------- */
.topbar{
  position:sticky;top:0;z-index:50;
  height:56px;background:#FFFFFF;
  border-bottom:1px solid var(--line);
  display:flex;align-items:center;
  transition:box-shadow var(--ease);
}
.topbar.is-stuck{box-shadow:0 6px 18px rgba(18,52,86,.08);}
.topbar .container{display:flex;align-items:center;justify-content:space-between;gap:16px;}
.crumb{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);flex-wrap:wrap;}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--blue);}
.crumb .sep{color:#B9CADA;}
.crumb .current{color:var(--blue-deep);font-weight:600;}
.topbar__tag{
  font-size:12.5px;color:var(--blue-deep);background:var(--blue-soft);
  border-radius:999px;padding:4px 12px;white-space:nowrap;
}
@media (max-width:767px){.topbar__tag{display:none;}}

/* ---------- 页面横幅 ---------- */
.page-banner{position:relative;overflow:hidden;background:var(--blue-deep);}
.page-banner__bg{
  position:absolute;inset:0;
  background-size:cover;background-position:center;
  opacity:.40;
}
.page-banner::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(96deg,rgba(19,56,88,.94) 0%,rgba(27,79,122,.74) 55%,rgba(27,79,122,.32) 100%);
}
.page-banner__inner{
  position:relative;z-index:2;
  padding-top:64px;padding-bottom:64px;
  min-height:300px;
  display:flex;flex-direction:column;justify-content:center;align-items:flex-start;
}
.eyebrow{
  display:inline-block;font-size:12.5px;letter-spacing:2px;
  color:#BBD9F1;background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.22);
  border-radius:999px;padding:4px 14px;margin-bottom:16px;
}
.page-banner h1{
  color:#FFFFFF;
  font-size:clamp(26px,3.4vw,40px);
  line-height:1.28;font-weight:600;
  letter-spacing:.3px;max-width:800px;
}
.page-banner__lead{
  margin-top:14px;color:#D3E5F4;font-size:16px;line-height:1.8;max-width:680px;
}
@media (max-width:767px){
  .page-banner__inner{padding-top:44px;padding-bottom:44px;min-height:260px;}
}

/* ---------- 板块 ---------- */
.section{padding:88px 0;}
.section--alt{background:var(--alt);}
.section--soft{background:var(--blue-soft);}
@media (max-width:991px){.section{padding:64px 0;}}
@media (max-width:767px){.section{padding:48px 0;}}
.section-head{max-width:780px;margin-bottom:40px;}
.section-head h2{
  font-size:clamp(22px,2.4vw,28px);
  line-height:1.35;font-weight:600;color:var(--blue-deep);
}
.section-head p{margin-top:12px;color:var(--muted);font-size:15.5px;line-height:1.8;}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center;}

/* ---------- 锚点目录 + 流程 ---------- */
.layout-anchor{display:grid;grid-template-columns:240px minmax(0,1fr);gap:48px;align-items:start;}
.anchor-nav{
  position:sticky;top:80px;
  background:#FFFFFF;border:1px solid var(--line);
  border-radius:var(--r-lg);padding:18px 16px;
  box-shadow:var(--sh-1);
}
.anchor-nav__title{
  font-size:12.5px;letter-spacing:1.4px;color:var(--muted);
  margin-bottom:10px;font-weight:600;
}
.anchor-link{
  display:block;padding:9px 12px;border-radius:8px;
  font-size:14px;color:var(--text);
  border-left:2px solid transparent;
  transition:background var(--ease),color var(--ease),border-color var(--ease);
}
.anchor-link:hover{background:var(--blue-soft);color:var(--blue-deep);text-decoration:none;}
.anchor-link.is-active{
  background:var(--blue-soft);border-left-color:var(--blue);
  color:var(--blue-deep);font-weight:600;
}
@media (max-width:991px){
  .layout-anchor{grid-template-columns:1fr;gap:24px;}
  .anchor-nav{
    position:static;display:flex;gap:8px;overflow-x:auto;
    padding:12px;border-radius:12px;
  }
  .anchor-nav__title{display:none;}
  .anchor-link{
    white-space:nowrap;border-left:0;border-radius:999px;
    background:var(--alt);border:1px solid var(--line);
    padding:6px 14px;font-size:13px;flex:0 0 auto;
  }
}

/* ---------- 步骤条 ---------- */
.step-list{position:relative;display:grid;gap:26px;}
.step-item{position:relative;display:grid;grid-template-columns:56px minmax(0,1fr);gap:20px;}
.step-item::before{
  content:"";position:absolute;left:27px;top:56px;bottom:-26px;
  width:2px;background:var(--line);
}
.step-item:last-child::before{display:none;}
.step-item__mark{
  position:relative;z-index:2;
  width:56px;height:56px;border-radius:50%;
  background:#FFFFFF;border:2px solid var(--blue);
  display:grid;place-items:center;
  font-size:15px;font-weight:700;color:var(--blue-deep);
  font-variant-numeric:tabular-nums;
}
.step-item--end .step-item__mark{
  background:var(--green);border-color:var(--green);color:#FFFFFF;
}
.step-item__body{
  background:#FFFFFF;border:1px solid var(--line);
  border-radius:var(--r-lg);padding:24px 26px;
  box-shadow:var(--sh-1);
  transition:transform var(--ease),box-shadow var(--ease);
}
.step-item__body:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.step-item__body h3{
  font-size:19px;font-weight:600;color:var(--blue-deep);
  margin-bottom:8px;line-height:1.5;
}
.step-item__body > p{color:#455B70;font-size:15.5px;}
.tick-list{margin-top:16px;display:grid;gap:9px;}
.tick-list li{position:relative;padding-left:22px;font-size:14.5px;color:var(--muted);line-height:1.7;}
.tick-list li::before{
  content:"";position:absolute;left:0;top:8px;
  width:9px;height:9px;border-radius:50%;
  background:var(--blue-soft);border:2px solid var(--blue);
}
@media (max-width:575px){
  .step-item{grid-template-columns:44px minmax(0,1fr);gap:14px;}
  .step-item__mark{width:44px;height:44px;font-size:13px;}
  .step-item::before{left:21px;top:46px;}
  .step-item__body{padding:20px 18px;}
}

/* ---------- 对比表 ---------- */
.table-wrap{
  overflow-x:auto;background:#FFFFFF;
  border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
}
.cmp-table{width:100%;min-width:660px;}
.cmp-table th,.cmp-table td{
  padding:16px 22px;text-align:left;font-size:14.5px;
  border-bottom:1px solid var(--line);vertical-align:top;line-height:1.7;
}
.cmp-table thead th{
  background:var(--blue-soft);color:var(--blue-deep);
  font-weight:600;font-size:14px;letter-spacing:.4px;white-space:nowrap;
}
.cmp-table tbody tr:last-child td{border-bottom:0;}
.cmp-table tbody tr:hover{background:var(--alt);}
.cmp-table td:first-child{font-weight:600;color:var(--text);white-space:nowrap;}

/* ---------- 卡片 ---------- */
.role-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
@media (max-width:991px){.role-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (max-width:575px){.role-grid{grid-template-columns:1fr;}}
.card{
  background:#FFFFFF;border:1px solid var(--line);
  border-radius:var(--r-lg);padding:26px 24px;
  box-shadow:var(--sh-1);
  transition:transform var(--ease),box-shadow var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.card__icon{
  width:44px;height:44px;border-radius:12px;
  background:var(--blue-soft);color:var(--blue);
  display:grid;place-items:center;font-size:18px;margin-bottom:16px;
}
.card h3{font-size:18px;font-weight:600;color:var(--blue-deep);line-height:1.5;}
.card p{margin-top:8px;font-size:14.5px;color:var(--muted);}
.badge{
  display:inline-block;margin-top:16px;margin-right:8px;
  font-size:12.5px;padding:3px 12px;border-radius:999px;
  background:var(--blue-soft);color:var(--blue-deep);
}

/* ---------- 图文行 ---------- */
.media-row{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:center;}
@media (max-width:991px){.media-row{grid-template-columns:1fr;gap:28px;}}
.media-figure{
  border-radius:var(--r-md);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--sh-1);
  aspect-ratio:16/11;background:var(--blue-soft);
}
.media-figure img{width:100%;height:100%;object-fit:cover;}
.check-list{display:grid;gap:18px;}
.check-list li{display:grid;grid-template-columns:26px minmax(0,1fr);gap:12px;}
.check-list i{color:var(--green);font-size:15px;margin-top:6px;}
.check-list strong{display:block;font-size:15.5px;font-weight:600;color:var(--blue-deep);line-height:1.6;}
.check-list span{display:block;font-size:14.5px;color:var(--muted);line-height:1.75;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:900px;}
.accordion{border:0;background:transparent;}
.accordion-item{
  border:1px solid var(--line);border-radius:var(--r-lg);
  background:#FFFFFF;margin-bottom:14px;overflow:hidden;
  box-shadow:var(--sh-1);
}
.accordion-item:last-child{margin-bottom:0;}
.accordion-title{
  position:relative;
  font-size:16px;font-weight:600;color:var(--blue-deep);
  padding:18px 60px 18px 24px;
  border:0;background:#FFFFFF;line-height:1.55;
  transition:background var(--ease),color var(--ease);
}
.accordion-title:hover{background:var(--alt);color:var(--blue-deep);}
.accordion-title::before{
  content:"\f067";
  font-family:"Font Awesome 6 Free";font-weight:900;
  position:absolute;right:24px;top:50%;transform:translateY(-50%);
  color:var(--blue);font-size:13px;
  width:auto;height:auto;margin:0;border:0;background:none;
}
.accordion-item.is-active .accordion-title::before{content:"\f068";}
.accordion-content{
  padding:0 24px 22px;border:0;background:#FFFFFF;
  color:var(--muted);font-size:15px;line-height:1.85;
}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--blue-soft);
  border:1px solid #D6E6F5;
  border-radius:18px;
  padding:42px 46px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
}
.cta-band h2{
  font-size:clamp(20px,2.2vw,26px);
  line-height:1.4;font-weight:600;color:var(--blue-deep);
}
.cta-band p{margin-top:10px;font-size:15px;color:#4E6C86;}
.cta-band__actions{display:flex;align-items:center;gap:14px;flex:0 0 auto;}
@media (max-width:991px){
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px 26px;}
  .cta-band__actions{flex-wrap:wrap;}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  text-decoration:none;white-space:nowrap;
  transition:background var(--ease),color var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.btn:hover{text-decoration:none;}
.btn--primary{background:var(--amber);color:#FFFFFF;border-color:var(--amber);}
.btn--primary:hover{background:#E08D26;border-color:#E08D26;color:#FFFFFF;transform:translateY(-1px);}
.btn--primary:active{transform:translateY(1px);box-shadow:inset 0 2px 6px rgba(0,0,0,.12);}
.btn--outline{background:transparent;color:var(--blue);border-color:var(--blue);}
.btn--outline:hover{background:var(--blue-soft);color:var(--blue-deep);border-color:var(--blue-deep);transform:translateY(-1px);}
.btn--outline:active{transform:translateY(1px);}
.btn--soft{background:#FFFFFF;color:var(--blue-deep);border-color:var(--line);}
.btn--soft:hover{background:var(--blue-soft);border-color:#CFE2F2;transform:translateY(-1px);}
.btn--sm{height:38px;padding:0 18px;font-size:14px;}
.btn:disabled,.btn.is-disabled{opacity:.5;pointer-events:none;}

/* ---------- 入口卡 ---------- */
.entry-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
@media (max-width:767px){.entry-grid{grid-template-columns:1fr;}}
.entry-card{
  display:flex;gap:20px;align-items:flex-start;
  background:#FFFFFF;border:1px solid var(--line);
  border-radius:var(--r-lg);padding:26px 24px;
  box-shadow:var(--sh-1);text-decoration:none;color:var(--text);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.entry-card:hover{
  transform:translateY(-2px);box-shadow:var(--sh-2);
  border-color:#CFE2F2;text-decoration:none;color:var(--text);
}
.entry-card__icon{
  flex:0 0 auto;width:46px;height:46px;border-radius:12px;
  background:var(--blue-soft);color:var(--blue);
  display:grid;place-items:center;font-size:18px;
}
.entry-card h3{font-size:17px;font-weight:600;color:var(--blue-deep);line-height:1.5;}
.entry-card p{margin-top:8px;font-size:14.5px;color:var(--muted);line-height:1.75;}
.entry-card .more{display:inline-block;margin-top:12px;font-size:14px;color:var(--blue);font-weight:600;}

/* ---------- 页脚 ---------- */
.site-foot{background:var(--alt);border-top:1px solid var(--line);padding:64px 0 0;margin-top:auto;}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px;}
@media (max-width:991px){.foot-grid{grid-template-columns:1fr 1fr;gap:32px;}}
@media (max-width:575px){.foot-grid{grid-template-columns:1fr;gap:28px;}}
.foot-brand{
  display:flex;align-items:center;gap:10px;
  font-size:16px;font-weight:700;color:var(--blue-deep);
  margin-bottom:14px;line-height:1.4;
}
.foot-brand .brand__mark{width:32px;height:32px;font-size:16px;border-radius:9px;}
.foot-col p{font-size:14px;color:var(--muted);line-height:1.85;max-width:340px;}
.foot-col h4{font-size:15px;font-weight:600;color:var(--blue-deep);margin-bottom:16px;}
.foot-list li{margin-bottom:10px;}
.foot-list a{font-size:14px;color:var(--muted);}
.foot-list a:hover{color:var(--blue);}
.foot-contact li{display:flex;gap:10px;font-size:14px;color:var(--muted);margin-bottom:12px;line-height:1.7;}
.foot-contact i{color:var(--blue);margin-top:5px;flex:0 0 auto;}
.foot-bar{
  border-top:1px solid var(--line);
  padding:20px 0;display:flex;justify-content:space-between;
  gap:16px;flex-wrap:wrap;font-size:13px;color:var(--muted);
}

/* ---------- 移动端 ---------- */
.mobile-bar{display:none;}
.drawer-mask{
  position:fixed;inset:0;background:rgba(16,42,68,.45);
  opacity:0;visibility:hidden;z-index:110;
  transition:opacity var(--ease),visibility var(--ease);
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.off-canvas.position-left{
  position:fixed;top:0;left:0;bottom:0;width:280px;
  background:#FFFFFF;border-right:1px solid var(--line);
  padding:22px 14px;overflow-y:auto;z-index:120;
  transform:translateX(-100%);
  transition:transform 220ms ease-out;
  box-shadow:0 0 40px rgba(18,52,86,.16);
}
.off-canvas.position-left.is-open{transform:translateX(0);}
.drawer-head{
  display:flex;align-items:center;justify-content:space-between;
  padding:0 8px 16px;border-bottom:1px solid var(--line);
}
.drawer-close{
  width:38px;height:38px;border-radius:10px;border:1px solid var(--line);
  background:#FFFFFF;color:var(--muted);cursor:pointer;
  display:grid;place-items:center;font-size:15px;
  transition:background var(--ease),color var(--ease);
}
.drawer-close:hover{background:var(--blue-soft);color:var(--blue-deep);}

@media (max-width:991px){
  .app-shell{display:none;}
  .site-main{margin-left:0;}
  .topbar{top:56px;}
  .mobile-bar{
    display:flex;align-items:center;gap:12px;
    position:fixed;top:0;left:0;right:0;height:56px;
    background:#FFFFFF;border-bottom:1px solid var(--line);
    padding:0 16px;z-index:90;
    box-shadow:0 2px 10px rgba(18,52,86,.05);
  }
  .mobile-bar .brand__name{font-size:15px;}
  .hamburger{
    width:40px;height:40px;border-radius:10px;
    border:1px solid var(--line);background:#FFFFFF;
    color:var(--blue-deep);cursor:pointer;
    display:grid;place-items:center;font-size:16px;
    transition:background var(--ease);
  }
  .hamburger:hover{background:var(--blue-soft);}
  .site-main{padding-top:56px;}
}
@media (max-width:575px){
  .cta-band__actions .btn{width:100%;}
}

/* roulang page: category3 */
/* ============ 设计变量 ============ */
:root{
  --c-primary:#2D77B8;
  --c-primary-hover:#276CA8;
  --c-primary-dark:#1B4F7A;
  --c-primary-light:#E8F1F9;
  --c-accent:#F2A03D;
  --c-green:#3FBFA0;
  --c-warn:#D9634F;
  --bg:#F4F7FA;
  --surface:#FFFFFF;
  --alt:#FAFCFE;
  --line:#E3EBF3;
  --text:#22384F;
  --text-muted:#5E7488;
  --text-soft:#8798A8;
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --shadow-1:0 1px 2px rgba(18,52,86,.06);
  --shadow-2:0 1px 2px rgba(18,52,86,.06),0 8px 24px rgba(18,52,86,.08);
  --shadow-3:0 14px 32px rgba(18,52,86,.12);
  --sidebar-w:236px;
  --ease:cubic-bezier(.2,.7,.4,1);
  --sp-1:8px; --sp-2:12px; --sp-3:16px; --sp-4:24px; --sp-5:32px; --sp-6:48px; --sp-7:64px; --sp-8:88px;
}

/* ============ 基础 reset ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--c-primary);text-decoration:none;transition:color .18s ease-out,background-color .18s ease-out;}
a:hover{color:var(--c-primary-dark);text-decoration:underline;}
button,input,select,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding-left:1.15em;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;}
::selection{background:var(--c-primary-light);}

/* ============ 容器与栅格 ============ */
.container{max-width:1240px;margin:0 auto;padding:0 40px;width:100%;}
.section{padding:var(--sp-8) 0;}
.section--white{background:var(--surface);}
.section--alt{background:var(--alt);}
.section--light{background:var(--c-primary-light);}
.section-head{max-width:780px;margin-bottom:var(--sp-6);}
.section-head h2{font-size:27px;line-height:1.35;font-weight:600;color:var(--c-primary-dark);letter-spacing:.01em;}
.section-head p{margin-top:14px;color:var(--text-muted);font-size:16px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:600;letter-spacing:.04em;
  color:var(--c-primary);background:var(--c-primary-light);
  border-radius:999px;padding:5px 13px;margin-bottom:16px;
}
.eyebrow i{font-size:11px;}

/* ============ 侧栏 App Shell ============ */
.off-canvas-wrapper{position:relative;}
.off-canvas.position-left{
  width:var(--sidebar-w);
  background:var(--alt);
  border-right:1px solid var(--line);
  padding:22px 16px 26px;
  overflow-y:auto;
}
.off-canvas-content{transition:none;}

.side-inner{display:flex;flex-direction:column;min-height:100%;}
.brand{display:flex;align-items:center;gap:10px;padding:4px 10px 20px;}
.brand__mark{
  width:36px;height:36px;flex:0 0 36px;border-radius:11px;
  background:var(--c-primary);color:#fff;
  display:grid;place-items:center;font-size:17px;font-weight:700;
}
.brand__name{font-size:15px;font-weight:600;color:var(--c-primary-dark);line-height:1.35;}

.nav-group{display:block;margin:0;}
.nav-group__title{
  font-size:12px;font-weight:600;letter-spacing:.08em;
  color:var(--text-soft);
  margin:16px 10px 6px;
  transition:opacity .16s var(--ease);
}
.nav-item{
  position:relative;
  display:flex;align-items:center;gap:10px;
  min-height:44px;padding:9px 12px;margin-bottom:2px;
  border-radius:10px;
  font-size:14.5px;color:var(--text);
  transition:background-color .18s var(--ease),color .18s var(--ease);
}
.nav-item i{width:18px;text-align:center;font-size:14px;color:var(--text-soft);transition:color .18s var(--ease);}
.nav-item:hover{background:#F1F6FB;color:var(--c-primary-dark);text-decoration:none;}
.nav-item:hover i{color:var(--c-primary);}
.nav-item.is-active{background:var(--c-primary-light);color:var(--c-primary-dark);font-weight:600;}
.nav-item.is-active i{color:var(--c-primary);}
.nav-item.is-active::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:20px;border-radius:0 3px 3px 0;background:var(--c-primary);
}
.side-note{
  margin-top:auto;padding:16px 12px 0;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--text-soft);line-height:1.7;
}

/* ============ 顶部条 ============ */
.topbar{
  position:sticky;top:0;z-index:45;
  height:56px;display:flex;align-items:center;gap:14px;
  padding:0 40px;
  background:rgba(255,255,255,.95);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease-out;
}
.topbar.is-stuck{box-shadow:0 6px 18px rgba(18,52,86,.08);}
.nav-toggle{
  display:none;
  align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:10px;
  border:1px solid var(--line);background:#fff;color:var(--c-primary-dark);
  cursor:pointer;transition:background-color .18s var(--ease);
}
.nav-toggle:hover{background:var(--c-primary-light);}
.topbar__brand{display:none;font-size:14.5px;font-weight:600;color:var(--c-primary-dark);}
.crumb{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--text-muted);flex-wrap:wrap;}
.crumb a{color:var(--text-muted);}
.crumb a:hover{color:var(--c-primary-dark);}
.crumb .sep{color:var(--text-soft);}
.crumb .now{color:var(--c-primary-dark);font-weight:600;}

/* ============ 页面横幅 ============ */
.page-hero{
  position:relative;
  min-height:300px;
  display:flex;align-items:flex-end;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  color:#fff;overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(96deg,rgba(27,79,122,.90) 0%,rgba(27,79,122,.62) 62%,rgba(27,79,122,.45) 100%);
}
.page-hero__inner{position:relative;z-index:2;width:100%;padding:60px 0 46px;max-width:860px;}
.page-hero h1{
  font-size:clamp(30px,4vw,44px);line-height:1.25;font-weight:600;
  letter-spacing:.01em;margin-bottom:16px;
}
.page-hero p{font-size:16.5px;color:rgba(255,255,255,.92);max-width:720px;}
.page-hero .hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.page-hero .hero-tags span{
  font-size:12.5px;padding:5px 12px;border-radius:999px;
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.32);color:#fff;
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease),border-color .18s var(--ease);
  text-decoration:none;
}
.btn:hover{text-decoration:none;}
.btn--primary{background:var(--c-primary);color:#fff;box-shadow:0 6px 16px rgba(45,119,184,.22);}
.btn--primary:hover{background:var(--c-primary-hover);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(45,119,184,.28);}
.btn--primary:active{transform:translateY(1px);box-shadow:0 3px 10px rgba(45,119,184,.2);}
.btn--ghost{background:transparent;color:var(--c-primary);border-color:#BBD4E8;}
.btn--ghost:hover{background:var(--c-primary-light);color:var(--c-primary-dark);border-color:#9FC4E2;}
.btn--soft{background:var(--c-primary-light);color:var(--c-primary-dark);}
.btn--soft:hover{background:#D9E8F5;color:var(--c-primary-dark);}
.btn--sm{height:38px;padding:0 16px;font-size:14px;}
.btn--xs{height:32px;padding:0 14px;font-size:13px;}
.btn[disabled],.btn.is-disabled{opacity:.5;pointer-events:none;box-shadow:none;}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;align-items:center;}

/* ============ 指标条 ============ */
.metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;}
.metric{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px 22px;box-shadow:var(--shadow-1);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease);
}
.metric:hover{transform:translateY(-2px);box-shadow:var(--shadow-3);}
.metric__num{
  font-size:31px;font-weight:700;line-height:1.1;color:var(--c-accent);
  font-variant-numeric:tabular-nums;
}
.metric__num small{font-size:15px;font-weight:600;margin-left:3px;color:var(--c-accent);}
.metric__label{font-size:13.5px;color:var(--text-muted);margin-top:8px;}
.lead-block{max-width:820px;}
.lead-block p{color:var(--text-muted);}
.lead-block p + p{margin-top:1em;}

/* ============ 长文分段 ============ */
.split{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:center;}
.split--rev{grid-template-columns:7fr 5fr;}
.split + .split{margin-top:72px;}
.split__media{margin:0;}
.split__media .media-frame{
  border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow-2);background:var(--c-primary-light);
}
.split__media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .25s var(--ease);}
.split__media .media-frame:hover img{transform:scale(1.02);}
.split__media figcaption{font-size:13px;color:var(--text-soft);text-align:center;margin-top:10px;}
.split__body h3{
  font-size:20px;font-weight:600;color:var(--c-primary-dark);
  line-height:1.45;margin-bottom:14px;display:flex;align-items:flex-start;gap:12px;
}
.step-no{
  flex:0 0 34px;width:34px;height:34px;border-radius:10px;
  background:var(--c-primary-light);color:var(--c-primary-dark);
  display:grid;place-items:center;font-size:14px;font-weight:700;
  font-variant-numeric:tabular-nums;margin-top:1px;
}
.split__body p{color:var(--text-muted);}
.split__body p + p{margin-top:1em;}
.pt-list{list-style:none;padding:0;margin:20px 0 0;}
.pt-list li{
  position:relative;padding-left:26px;margin-bottom:11px;
  font-size:15px;color:var(--text);
}
.pt-list li::before{
  content:"";position:absolute;left:4px;top:11px;
  width:8px;height:8px;border-radius:50%;
  background:var(--c-green);opacity:.85;
}

/* ============ 提示卡 ============ */
.tip{
  display:flex;gap:14px;align-items:flex-start;
  background:var(--c-primary-light);
  border-left:3px solid var(--c-primary);
  border-radius:10px;padding:16px 18px;margin-top:24px;
  font-size:14.5px;color:var(--c-primary-dark);
}
.tip i{font-size:15px;margin-top:3px;color:var(--c-primary);}
.tip--warn{background:#FDF1EE;border-left-color:var(--c-warn);color:#8E3B2C;}
.tip--warn i{color:var(--c-warn);}
.tip-stack{margin-top:24px;}
.tip-stack .tip{margin-top:12px;}

/* ============ 信息卡网格 ============ */
.info-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
.info-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px 24px;box-shadow:var(--shadow-1);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.info-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-3);border-color:#D3E3F1;}
.info-card h3{font-size:18px;font-weight:600;color:var(--c-primary-dark);margin-bottom:10px;}
.info-card p{font-size:14.8px;color:var(--text-muted);}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;font-weight:600;border-radius:999px;
  padding:3px 11px;background:var(--c-primary-light);color:var(--c-primary);
}
.badge--green{background:#E4F7F2;color:#269A80;}
.badge--amber{background:#FDF1E0;color:#B77416;}

/* ============ 模块列表 ============ */
.entry-list{border-top:1px solid var(--line);}
.entry{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:56px;padding:15px 16px;border-bottom:1px solid var(--line);
  transition:background-color .18s var(--ease);border-radius:8px;
}
.entry:hover{background:var(--c-primary-light);text-decoration:none;}
.entry__main{display:flex;align-items:center;gap:14px;min-width:0;}
.entry__dot{
  width:9px;height:9px;border-radius:50%;background:var(--c-primary);flex:0 0 9px;
}
.entry__title{font-size:15.5px;font-weight:600;color:var(--text);}
.entry__meta{font-size:13px;color:var(--text-soft);white-space:nowrap;}
.entry:hover .entry__title{color:var(--c-primary-dark);}

/* ============ 双入口卡 ============ */
.duo-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.duo-card{
  position:relative;display:flex;flex-direction:column;gap:14px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:30px 28px;box-shadow:var(--shadow-2);overflow:hidden;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease);
}
.duo-card::after{
  content:"";position:absolute;right:-40px;top:-40px;width:130px;height:130px;
  border-radius:50%;background:var(--c-primary-light);
}
.duo-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-3);}
.duo-card__icon{
  position:relative;z-index:2;
  width:44px;height:44px;border-radius:12px;background:var(--c-primary);
  color:#fff;display:grid;place-items:center;font-size:17px;
}
.duo-card h3{position:relative;z-index:2;font-size:20px;font-weight:600;color:var(--c-primary-dark);}
.duo-card p{position:relative;z-index:2;font-size:15px;color:var(--text-muted);}
.duo-card .link-arrow{position:relative;z-index:2;font-weight:600;font-size:15px;display:inline-flex;align-items:center;gap:8px;}
.duo-card .link-arrow i{transition:transform .18s var(--ease);font-size:13px;}
.duo-card .link-arrow:hover i{transform:translateX(3px);}

/* ============ CTA 与表单 ============ */
.cta-band{
  background:var(--surface);border:1px solid #D5E5F3;border-radius:16px;
  padding:34px 38px;display:flex;align-items:center;justify-content:space-between;
  gap:28px;flex-wrap:wrap;box-shadow:var(--shadow-1);
}
.cta-band h2{font-size:24px;font-weight:600;color:var(--c-primary-dark);margin-bottom:8px;}
.cta-band p{font-size:15px;color:var(--text-muted);max-width:620px;}
.contact-wrap{margin-top:34px;}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
.field{display:flex;flex-direction:column;}
.field--full{grid-column:1 / -1;}
.field label{font-size:13.5px;font-weight:600;color:var(--text);margin-bottom:7px;}
.field input,.field select,.field textarea{
  width:100%;height:44px;border:1px solid var(--line);border-radius:10px;
  padding:0 14px;background:#fff;color:var(--text);
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.field textarea{height:auto;min-height:124px;padding:12px 14px;line-height:1.7;resize:vertical;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(45,119,184,.14);
}
.field input::placeholder,.field textarea::placeholder{color:#A9B8C6;}
.form-actions{grid-column:1 / -1;display:flex;align-items:center;gap:18px;flex-wrap:wrap;}
.form-note{font-size:13px;color:var(--text-muted);}
.form-note.is-ok{color:var(--c-green);font-weight:600;}

/* ============ 页脚 ============ */
.site-foot{background:var(--alt);border-top:1px solid var(--line);padding:56px 0 0;}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:32px;padding-bottom:38px;}
.foot-brand{display:flex;align-items:center;gap:10px;font-size:15.5px;font-weight:600;color:var(--c-primary-dark);margin-bottom:14px;}
.foot-brand .brand__mark{width:32px;height:32px;flex:0 0 32px;font-size:15px;border-radius:10px;}
.foot-col--brand p{font-size:14.5px;color:var(--text-muted);max-width:340px;}
.foot-col h4{font-size:14px;font-weight:600;color:var(--c-primary-dark);margin-bottom:16px;}
.foot-list{list-style:none;padding:0;margin:0;}
.foot-list li{margin-bottom:10px;}
.foot-list a{font-size:14.5px;color:var(--text-muted);}
.foot-list a:hover{color:var(--c-primary-dark);}
.foot-contact{list-style:none;padding:0;margin:0;}
.foot-contact li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--text-muted);margin-bottom:12px;}
.foot-contact i{color:var(--c-primary);margin-top:5px;font-size:13px;}
.foot-bar{
  border-top:1px solid var(--line);padding:18px 0;
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13.5px;color:var(--text-soft);
}

/* ============ 响应式 ============ */
@media (min-width:992px){
  .off-canvas.position-left{
    position:fixed !important;
    top:0;left:0;bottom:0;
    transform:none !important;
    height:auto;
    z-index:60;
    transition:width .2s var(--ease);
  }
  .off-canvas-content{margin-left:var(--sidebar-w);}
}
@media (min-width:992px) and (max-width:1199px){
  .off-canvas.position-left{width:72px;overflow:hidden;}
  .off-canvas.position-left:hover{width:var(--sidebar-w);box-shadow:var(--shadow-3);}
  .off-canvas.position-left:not(:hover) .brand__name,
  .off-canvas.position-left:not(:hover) .nav-text,
  .off-canvas.position-left:not(:hover) .side-note{opacity:0;visibility:hidden;}
  .off-canvas.position-left:not(:hover) .nav-group__title{opacity:0;height:0;margin:0;overflow:hidden;}
  .off-canvas.position-left:not(:hover) .nav-item{justify-content:center;padding:9px 0;}
  .off-canvas.position-left:not(:hover) .nav-item.is-active::before{left:-8px;}
  .off-canvas-content{margin-left:72px;}
  .brand__name,.nav-text,.side-note{transition:opacity .16s var(--ease);}
}
@media (max-width:1199px){
  .container{padding:0 28px;}
  .topbar{padding:0 28px;}
  .section{padding:64px 0;}
  .cta-band{padding:30px 28px;}
}
@media (max-width:991px){
  .off-canvas.position-left{width:280px;}
  .off-canvas-content{margin-left:0;}
  .nav-toggle{display:inline-flex;}
  .topbar__brand{display:block;}
  .crumb{display:none;}
  .container{padding:0 18px;}
  .topbar{padding:0 18px;}
  .section{padding:56px 0;}
  .page-hero{min-height:260px;}
  .page-hero__inner{padding:48px 0 38px;}
  .split,.split--rev{grid-template-columns:1fr;gap:26px;}
  .split--rev .split__media{order:-1;}
  .split + .split{margin-top:56px;}
  .metrics{grid-template-columns:repeat(2,minmax(0,1fr));}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .cta-band{flex-direction:column;align-items:flex-start;}
}
@media (max-width:767px){
  .section{padding:48px 0;}
  .section-head h2{font-size:23px;}
  .info-grid,.duo-grid,.form-grid{grid-template-columns:1fr;}
  .split__body h3{font-size:19px;}
  .metrics{gap:14px;}
  .metric{padding:20px 18px;}
  .metric__num{font-size:27px;}
  .entry{flex-direction:column;align-items:flex-start;gap:6px;min-height:auto;}
  .entry__meta{white-space:normal;}
  .foot-grid{grid-template-columns:1fr;}
}
@media (max-width:575px){
  .container{padding:0 16px;}
  .topbar{padding:0 16px;}
  .page-hero__inner{padding:40px 0 32px;}
  .page-hero h1{font-size:28px;}
  .metrics{grid-template-columns:1fr;}
  .cta-band{padding:24px 20px;}
  .info-card,.duo-card{padding:22px 20px;}
  .btn{width:100%;}
  .btn-row{flex-direction:column;align-items:stretch;}
  .form-actions{flex-direction:column;align-items:stretch;}
}