/* roulang page: index */
:root{
  --c-primary:#1D5BD6;
  --c-primary-dark:#1749B0;
  --c-primary-soft:#E8F0FE;
  --c-teal:#12B0A0;
  --c-teal-soft:#E4F7F5;
  --c-orange:#FF7A2F;
  --c-orange-soft:#FFF1E8;
  --c-bg:#F5F8FD;
  --c-surface:#FFFFFF;
  --c-line:#E3EAF5;
  --c-text:#16233A;
  --c-muted:#5A6B85;
  --c-footer:#0F1B2E;
  --r-card:16px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --shadow-sm:0 8px 24px rgba(16,42,86,.06);
  --shadow-lg:0 14px 36px rgba(16,42,86,.12);
  --container:1200px;
  --nav-h:72px;
  --sec-py:92px;
  --t:200ms ease;

  --bs-primary:#1D5BD6;
  --bs-primary-rgb:29,91,214;
  --bs-body-font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  --bs-body-color:#16233A;
  --bs-body-bg:#F5F8FD;
  --bs-border-radius:16px;
  --bs-border-color:#E3EAF5;
  --bs-link-color:#1D5BD6;
  --bs-link-hover-color:#1749B0;
  --bs-link-decoration:none;
  --bs-font-sans-serif:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--bs-body-font-family);
  font-size:16px;
  line-height:1.8;
  color:var(--c-text);
  background:var(--c-bg);
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--c-primary);text-decoration:none;transition:color var(--t);}
a:hover{color:var(--c-primary-dark);}
ul,ol{padding-left:0;list-style:none;margin:0;}
p{margin:0 0 1em;}
h1,h2,h3,h4{font-weight:800;line-height:1.3;margin:0;color:var(--c-text);letter-spacing:-.01em;}
button{font-family:inherit;}
:focus-visible{outline:3px solid rgba(29,91,214,.25);outline-offset:2px;border-radius:6px;}

.container{max-width:var(--container);margin:0 auto;padding:0 24px;width:100%;}
.section{padding:var(--sec-py) 0;}
.section--alt{background:var(--c-bg);}
.section--white{background:var(--c-surface);}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.96);
  backdrop-filter:saturate(180%) blur(8px);
  border-bottom:1px solid transparent;
  transition:box-shadow var(--t),border-color var(--t),height var(--t);
}
.site-header.is-stuck{border-bottom-color:var(--c-line);box-shadow:0 6px 20px rgba(16,42,86,.07);}
.nav-wrap{
  display:flex;align-items:center;justify-content:space-between;
  height:var(--nav-h);gap:16px;
}
.site-header.is-stuck .nav-wrap{height:64px;}
.nav-side{display:flex;align-items:center;gap:6px;flex:1 1 0;min-width:0;}
.nav-side--right{justify-content:flex-end;}
.nav-item{
  position:relative;
  display:inline-flex;align-items:center;
  height:40px;padding:0 14px;
  font-size:15px;font-weight:500;color:var(--c-text);
  border-radius:var(--r-btn);
  white-space:nowrap;
  transition:color var(--t),background var(--t);
}
.nav-item:hover{color:var(--c-primary);background:var(--c-primary-soft);}
.nav-item.is-active{color:var(--c-primary);font-weight:700;}
.nav-item.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;
  height:3px;border-radius:3px;background:var(--c-primary);
}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  flex:0 0 auto;padding:0 8px;
}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;
  display:grid;place-items:center;
  border-radius:12px;
  background:linear-gradient(135deg,var(--c-primary) 0%,#2F7BF0 100%);
  color:#fff;font-weight:800;font-size:18px;
  box-shadow:0 6px 16px rgba(29,91,214,.28);
}
.brand-text{
  font-size:18px;font-weight:800;color:var(--c-text);letter-spacing:.5px;
  white-space:nowrap;
}
.btn-cta-nav{
  display:inline-flex;align-items:center;gap:8px;
  height:42px;padding:0 20px;margin-left:8px;
  border-radius:var(--r-btn);
  background:var(--c-orange);color:#fff;font-weight:700;font-size:15px;
  border:none;
  transition:background var(--t),box-shadow var(--t),transform var(--t);
}
.btn-cta-nav:hover{background:#EA6619;color:#fff;box-shadow:0 10px 24px rgba(255,122,47,.32);}
.btn-cta-nav:active{transform:translateY(1px);}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border:1px solid var(--c-line);background:#fff;
  border-radius:var(--r-btn);color:var(--c-text);font-size:18px;
}
.nav-toggle:hover{border-color:var(--c-primary);color:var(--c-primary);}
.mobile-panel{
  border-top:1px solid var(--c-line);
  background:#fff;
  padding:8px 0 18px;
}
.mobile-panel .nav-item{
  display:flex;width:100%;height:48px;padding:0 24px;
  border-radius:0;font-size:16px;
}
.mobile-panel .nav-item.is-active::after{display:none;}
.mobile-panel .nav-item.is-active{background:var(--c-primary-soft);border-left:3px solid var(--c-primary);}
.mobile-cta{margin:12px 24px 0;}
.mobile-cta .btn-cta-nav{margin:0;width:100%;justify-content:center;}

/* ---------- Buttons ---------- */
.btn-solid,.btn-ghost,.btn-accent{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:48px;padding:0 24px;
  border-radius:var(--r-btn);
  font-size:16px;font-weight:700;
  border:1px solid transparent;cursor:pointer;
  transition:background var(--t),color var(--t),box-shadow var(--t),transform var(--t),border-color var(--t);
}
.btn-solid{background:var(--c-primary);color:#fff;box-shadow:0 8px 20px rgba(29,91,214,.22);}
.btn-solid:hover{background:var(--c-primary-dark);color:#fff;box-shadow:0 12px 28px rgba(29,91,214,.3);}
.btn-solid:active{transform:translateY(1px);}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:#C6D8F7;}
.btn-ghost:hover{background:var(--c-primary-soft);color:var(--c-primary-dark);border-color:var(--c-primary);}
.btn-ghost:active{transform:translateY(1px);}
.btn-accent{background:var(--c-orange);color:#fff;box-shadow:0 8px 20px rgba(255,122,47,.26);}
.btn-accent:hover{background:#EA6619;color:#fff;box-shadow:0 12px 28px rgba(255,122,47,.34);}
.btn-accent:active{transform:translateY(1px);}
.btn-solid:disabled,.btn-ghost:disabled,.btn-accent:disabled{background:#EDF1F8;color:#9AA8BE;border-color:#E3EAF5;box-shadow:none;cursor:not-allowed;}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;
  font-weight:700;font-size:15px;color:var(--c-primary);
}
.link-arrow i{transition:transform var(--t);}
.link-arrow:hover i{transform:translateX(4px);}

/* ---------- Badges ---------- */
.badge-pill{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 12px;
  border-radius:var(--r-pill);
  font-size:12px;font-weight:700;line-height:1;
}
.badge-blue{background:var(--c-primary-soft);color:var(--c-primary);}
.badge-teal{background:var(--c-teal-soft);color:#0B8578;}
.badge-orange{background:var(--c-orange-soft);color:#D9581A;}
.badge-grey{background:#EEF2F9;color:var(--c-muted);}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  min-height:540px;
  display:flex;align-items:center;
  padding:72px 0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center right;
  overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(96deg,rgba(255,255,255,.95) 0%,rgba(255,255,255,.86) 42%,rgba(232,240,254,.46) 100%);
}
.hero .container{position:relative;z-index:2;}
.hero-row{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  height:32px;padding:0 14px;margin-bottom:20px;
  border-radius:var(--r-pill);
  background:#fff;border:1px solid #D7E3F7;
  color:var(--c-primary);font-size:13px;font-weight:700;
  box-shadow:var(--shadow-sm);
}
.hero-tag i{font-size:11px;color:var(--c-teal);}
.hero h1{
  font-size:44px;line-height:1.22;
  margin-bottom:18px;
  color:#0F1B2E;
}
.hero h1 span{color:var(--c-primary);}
.hero-sub{
  font-size:17px;line-height:1.85;color:#3C4E6B;
  max-width:600px;margin-bottom:28px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:22px;}
.hero-notes{display:flex;flex-wrap:wrap;gap:18px;font-size:14px;color:var(--c-muted);}
.hero-notes span{display:inline-flex;align-items:center;gap:7px;}
.hero-notes i{color:var(--c-teal);}

.hero-card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-lg);
  padding:24px;
}
.hero-card-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.hero-card-head strong{font-size:16px;font-weight:800;}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:22px;}
.hero-stat{
  background:var(--c-bg);
  border-radius:12px;
  padding:14px 10px;text-align:center;
}
.hero-stat b{display:block;font-size:22px;font-weight:800;color:var(--c-primary);line-height:1.2;}
.hero-stat span{display:block;font-size:12px;color:var(--c-muted);margin-top:4px;}
.progress-line{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--c-muted);margin-bottom:8px;}
.progress-line b{color:var(--c-text);font-size:14px;}
.bar{height:8px;border-radius:var(--r-pill);background:#E7EEF9;overflow:hidden;}
.bar i{display:block;height:100%;border-radius:var(--r-pill);background:linear-gradient(90deg,var(--c-primary),#4C8BF0);width:0;transition:width 400ms ease;}
.bar--teal i{background:linear-gradient(90deg,var(--c-teal),#37CFBF);}
.hero-card-foot{
  margin-top:18px;padding-top:16px;border-top:1px dashed var(--c-line);
  font-size:13px;color:var(--c-muted);display:flex;align-items:center;gap:8px;
}
.hero-card-foot i{color:var(--c-orange);}

/* ---------- Section head ---------- */
.sec-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  margin-bottom:44px;
}
.sec-tag{
  display:inline-block;
  font-size:13px;font-weight:700;color:var(--c-primary);
  letter-spacing:2px;margin-bottom:10px;
}
.sec-head h2{font-size:32px;line-height:1.35;margin-bottom:10px;}
.sec-head p{color:var(--c-muted);font-size:15.5px;max-width:660px;margin:0;}

/* ---------- Step flow ---------- */
.steps{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-sm);
  overflow:hidden;
}
.step{
  position:relative;
  padding:30px 26px 30px 30px;
  border-right:1px solid var(--c-line);
  transition:background var(--t);
}
.step:last-child{border-right:none;}
.step:hover{background:#FBFCFE;}
.step-num{
  width:44px;height:44px;
  display:grid;place-items:center;
  border-radius:14px;
  background:var(--c-primary-soft);
  color:var(--c-primary);
  font-weight:800;font-size:17px;
  margin-bottom:16px;
}
.step:nth-child(4) .step-num{background:var(--c-orange-soft);color:#D9581A;}
.step h3{font-size:18px;margin-bottom:10px;}
.step p{font-size:14.5px;color:var(--c-muted);line-height:1.75;margin:0;}
.step::after{
  content:"";position:absolute;top:52px;right:-8px;
  width:16px;height:16px;border-radius:50%;
  background:#fff;border:3px solid var(--c-primary-soft);
  z-index:2;
}
.step:last-child::after{display:none;}

/* ---------- Rewards ---------- */
.reward-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:22px;}
.reward-card{
  grid-column:span 3;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  display:flex;flex-direction:column;
  transition:transform var(--t),box-shadow var(--t);
}
.reward-card--small{grid-column:span 2;}
.reward-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);}
.reward-thumb{
  position:relative;width:100%;aspect-ratio:16/9;overflow:hidden;background:#EDF2FA;
}
.reward-card--small .reward-thumb{aspect-ratio:4/3;}
.reward-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 300ms ease;}
.reward-card:hover .reward-thumb img{transform:scale(1.03);}
.reward-thumb .badge-pill{position:absolute;top:14px;left:14px;}
.reward-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.reward-body h3{font-size:19px;}
.reward-card--small .reward-body h3{font-size:17px;}
.reward-cond{
  font-size:14px;color:var(--c-muted);
  display:flex;align-items:flex-start;gap:8px;line-height:1.7;margin:0;
}
.reward-cond i{color:var(--c-primary);margin-top:5px;font-size:12px;}
.reward-foot{
  margin-top:auto;padding-top:14px;border-top:1px dashed var(--c-line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--c-muted);
}
.reward-foot .link-arrow{font-size:14px;}

/* ---------- Tasks ---------- */
.task-wrap{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-sm);
  padding:34px;
}
.milestones{
  display:grid;grid-template-columns:repeat(5,1fr);
  gap:12px;margin-bottom:26px;
}
.milestone{display:flex;flex-direction:column;align-items:center;gap:10px;text-align:center;}
.milestone .dot{
  width:34px;height:34px;border-radius:50%;
  display:grid;place-items:center;
  font-size:13px;font-weight:800;
  background:#EEF2F9;color:var(--c-muted);
  border:2px solid #E3EAF5;
  transition:all var(--t);
}
.milestone.done .dot{background:var(--c-teal);border-color:var(--c-teal);color:#fff;}
.milestone.current .dot{background:#fff;border-color:var(--c-primary);color:var(--c-primary);box-shadow:0 0 0 6px rgba(29,91,214,.1);}
.milestone span{font-size:13px;color:var(--c-muted);line-height:1.5;}
.milestone.done span,.milestone.current span{color:var(--c-text);font-weight:600;}
.milestone-track{height:8px;border-radius:var(--r-pill);background:#E7EEF9;overflow:hidden;margin-bottom:30px;}
.milestone-track i{display:block;height:100%;width:0;border-radius:var(--r-pill);background:linear-gradient(90deg,var(--c-teal),#37CFBF);transition:width 400ms ease;}
.task-list{display:flex;flex-direction:column;gap:14px;}
.task-item{
  display:grid;grid-template-columns:1fr auto;
  gap:10px 20px;align-items:center;
  padding:18px 20px;
  background:var(--c-bg);
  border-radius:12px;
  border:1px solid #EDF2FA;
  transition:border-color var(--t),background var(--t);
}
.task-item:hover{border-color:#C6D8F7;background:#F8FAFF;}
.task-top{display:flex;align-items:center;gap:12px;flex-wrap:wrap;}
.task-item h3{font-size:16px;font-weight:700;}
.task-item p{grid-column:1 / -1;font-size:13.5px;color:var(--c-muted);margin:0;}
.task-bar{grid-column:1 / -1;height:6px;border-radius:var(--r-pill);background:#E7EEF9;overflow:hidden;}
.task-bar i{display:block;height:100%;width:0;border-radius:var(--r-pill);background:var(--c-primary);transition:width 400ms ease;}
.task-bar--teal i{background:var(--c-teal);}
.task-percent{font-size:15px;font-weight:800;color:var(--c-primary);white-space:nowrap;}

/* ---------- Join band ---------- */
.join-band{
  background:linear-gradient(180deg,#EFF5FF 0%,#F5F8FD 100%);
  border-top:1px solid #E3EAF5;
  border-bottom:1px solid #E3EAF5;
  text-align:center;
  padding:72px 0;
}
.join-band h2{font-size:30px;margin-bottom:14px;}
.join-band p{color:var(--c-muted);max-width:640px;margin:0 auto 26px;}
.join-band .btn-accent{height:56px;padding:0 42px;font-size:17px;border-radius:14px;}
.join-band small{display:block;margin-top:16px;font-size:13px;color:var(--c-muted);}

/* ---------- News list ---------- */
.news-list{display:flex;flex-direction:column;gap:20px;}
.news-item{
  display:grid;grid-template-columns:280px 1fr;
  gap:24px;align-items:stretch;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:transform var(--t),box-shadow var(--t);
}
.news-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);}
.news-thumb{
  position:relative;aspect-ratio:4/3;overflow:hidden;background:#EDF2FA;
}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 300ms ease;}
.news-item:hover .news-thumb img{transform:scale(1.03);}
.news-body{padding:24px 26px 24px 0;display:flex;flex-direction:column;gap:10px;}
.news-body h3{font-size:20px;line-height:1.5;}
.news-body h3 a{color:var(--c-text);}
.news-body h3 a:hover{color:var(--c-primary);}
.news-body p{font-size:14.5px;color:var(--c-muted);margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{
  margin-top:auto;display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  font-size:13px;color:var(--c-muted);
}
.news-meta .dot-sep{width:4px;height:4px;border-radius:50%;background:#C3CEDF;}
.news-empty{
  text-align:center;padding:56px 24px;
  background:var(--c-surface);
  border:1px dashed #CBD9EE;
  border-radius:var(--r-card);
}
.news-empty i{font-size:34px;color:#9FB6D9;margin-bottom:14px;display:block;}
.news-empty p{color:var(--c-muted);margin-bottom:18px;}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:920px;margin:0 auto;}
.faq-item{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-sm);
  overflow:hidden;
}
.faq-q{
  width:100%;display:flex;align-items:center;gap:16px;
  padding:20px 22px;background:none;border:none;text-align:left;cursor:pointer;
}
.faq-idx{
  width:32px;height:32px;flex:0 0 32px;
  display:grid;place-items:center;
  border-radius:10px;background:#EEF2F9;color:var(--c-muted);
  font-size:14px;font-weight:800;
  transition:background var(--t),color var(--t);
}
.faq-q span.qt{flex:1;font-size:16px;font-weight:600;color:var(--c-text);}
.faq-q i.plus{color:var(--c-muted);font-size:15px;transition:transform var(--t),color var(--t);}
.faq-item.open .faq-idx{background:var(--c-primary);color:#fff;}
.faq-item.open .faq-q i.plus{transform:rotate(45deg);color:var(--c-primary);}
.faq-a{max-height:0;overflow:hidden;transition:max-height 300ms ease;}
.faq-a .inner{
  padding:0 22px 22px 70px;
  font-size:15px;line-height:1.85;color:#3C4E6B;
  border-left:3px solid var(--c-primary);
  margin-left:22px;padding-left:20px;
}
.faq-a .inner p{margin:0;}

/* ---------- Closing CTA ---------- */
.closing{
  background:#0F1B2E;
  color:#fff;
  border-radius:20px;
  padding:46px 44px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  overflow:hidden;position:relative;
}
.closing::after{
  content:"";position:absolute;right:-60px;top:-60px;
  width:260px;height:260px;border-radius:50%;
  background:rgba(29,91,214,.28);filter:blur(10px);
}
.closing h2{color:#fff;font-size:26px;margin-bottom:10px;}
.closing p{color:#A9BAD4;margin:0;font-size:15px;}
.closing .btn-solid{position:relative;z-index:2;background:#fff;color:var(--c-primary);box-shadow:none;white-space:nowrap;}
.closing .btn-solid:hover{background:#E8F0FE;color:var(--c-primary-dark);}

/* ---------- Footer ---------- */
.site-footer{background:var(--c-footer);color:#A9BAD4;padding:64px 0 0;margin-top:0;}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;
  padding-bottom:44px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-text{color:#fff;font-size:17px;}
.footer-brand .brand-mark{width:34px;height:34px;flex:0 0 34px;font-size:16px;}
.site-footer p{font-size:14px;line-height:1.85;color:#8FA3C0;margin:0;}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px;letter-spacing:.5px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{color:#A9BAD4;font-size:14px;}
.footer-col a:hover{color:#fff;text-decoration:underline;}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:#A9BAD4;}
.footer-contact i{color:var(--c-teal);margin-top:5px;font-size:13px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 26px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#7D91AF;
}
.footer-bottom a{color:#A9BAD4;}
.footer-bottom a:hover{color:#fff;}

/* ---------- Reveal animation ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity 500ms ease,transform 500ms ease;}
.reveal.in{opacity:1;transform:none;}

/* ---------- Responsive ---------- */
@media (max-width:1199px){
  .hero h1{font-size:38px;}
  .sec-head h2{font-size:28px;}
  .step{padding:26px 20px;}
}
@media (max-width:991px){
  :root{--sec-py:64px;}
  .nav-side{display:none !important;}
  .nav-toggle{display:inline-flex;}
  .nav-wrap{height:64px;}
  .brand{position:absolute;left:50%;transform:translateX(-50%);}
  .site-header .container{position:relative;display:flex;align-items:center;justify-content:space-between;}
  .brand-text{font-size:16px;}
  .hero{padding:52px 0;min-height:auto;}
  .hero-row{grid-template-columns:1fr;gap:32px;}
  .hero h1{font-size:32px;}
  .hero-sub{font-size:16px;}
  .steps{grid-template-columns:1fr 1fr;}
  .step{border-right:none;border-bottom:1px solid var(--c-line);}
  .step:nth-child(odd){border-right:1px solid var(--c-line);}
  .step:nth-last-child(-n+2){border-bottom:none;}
  .step::after{display:none;}
  .reward-card,.reward-card--small{grid-column:span 3;}
  .milestones{grid-template-columns:repeat(3,1fr);gap:18px 12px;}
  .news-item{grid-template-columns:220px 1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
  .closing{flex-direction:column;align-items:flex-start;text-align:left;padding:36px 28px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .hero h1{font-size:28px;}
  .hero-card{padding:20px;}
  .hero-stats{grid-template-columns:repeat(3,1fr);gap:8px;}
  .hero-stat b{font-size:18px;}
  .steps{grid-template-columns:1fr;}
  .step{border-right:none !important;border-bottom:1px solid var(--c-line);padding:24px 20px;}
  .step:last-child{border-bottom:none;}
  .reward-grid{grid-template-columns:1fr;}
  .reward-card,.reward-card--small{grid-column:span 1;}
  .task-wrap{padding:22px 18px;}
  .milestones{grid-template-columns:repeat(2,1fr);}
  .news-item{grid-template-columns:1fr;}
  .news-body{padding:20px 22px 22px;}
  .sec-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:30px;}
  .sec-head h2{font-size:24px;}
  .join-band .btn-accent{width:100%;padding:0 24px;}
  .faq-a .inner{padding-left:16px;margin-left:16px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .closing h2{font-size:22px;}
  .closing .btn-solid{width:100%;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  .reward-card:hover,.news-item:hover{transform:none;}
}

/* roulang page: article */
:root{
  --c-primary:#1D5BD6;
  --c-primary-dark:#1749B0;
  --c-primary-soft:#E8F0FE;
  --c-teal:#12B0A0;
  --c-teal-soft:#E4F7F5;
  --c-orange:#FF7A2F;
  --c-orange-soft:#FFF1E8;
  --c-bg:#F5F8FD;
  --c-surface:#FFFFFF;
  --c-line:#E3EAF5;
  --c-text:#16233A;
  --c-muted:#5A6B85;
  --c-footer:#0F1B2E;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-sm:0 8px 24px rgba(16,42,86,.06);
  --shadow-lg:0 14px 36px rgba(16,42,86,.12);
  --container:1200px;
  --bs-primary:#1D5BD6;
  --bs-body-font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  --bs-border-radius:16px;
  --bs-link-color:#1D5BD6;
  --bs-link-hover-color:#1749B0;
  --bs-link-decoration:none;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border-style:none}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease,opacity .2s ease}
a:hover{color:var(--c-primary-dark)}
button{font-family:inherit;cursor:pointer}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:800;color:var(--c-text)}
p{margin:0 0 1em}
:focus-visible{outline:3px solid rgba(29,91,214,.25);outline-offset:2px;border-radius:6px}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(255,255,255,.96);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:box-shadow .2s ease,border-color .2s ease;
}
.site-header.is-scrolled{
  border-bottom-color:var(--c-line);
  box-shadow:0 8px 24px rgba(16,42,86,.07);
}
.nav-wrap{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:20px;
  height:72px;
  transition:height .2s ease;
}
.site-header.is-scrolled .nav-wrap{height:64px}
.nav-side{display:flex;align-items:center;gap:2px}
.nav-side--left{grid-column:1;justify-content:flex-start}
.nav-side--right{grid-column:3;justify-content:flex-end;gap:6px}
.brand{
  grid-column:2;
  justify-self:center;
  display:flex;
  align-items:center;
  gap:10px;
}
.brand-mark{
  width:38px;height:38px;
  border-radius:12px;
  background:linear-gradient(135deg,#2C6BEA,#1D5BD6);
  color:#fff;
  display:grid;place-items:center;
  font-weight:800;font-size:18px;
  box-shadow:0 6px 16px rgba(29,91,214,.28);
  flex:none;
}
.brand-text{
  font-size:19px;
  font-weight:800;
  letter-spacing:.5px;
  color:var(--c-text);
  white-space:nowrap;
}
.nav-item{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:72px;
  padding:0 14px;
  font-size:15px;
  font-weight:500;
  color:var(--c-text);
}
.site-header.is-scrolled .nav-item{height:64px}
.nav-item::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:16px;
  height:3px;border-radius:3px;
  background:var(--c-primary);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .2s ease;
}
.nav-item:hover{color:var(--c-primary)}
.nav-item:hover::after,.nav-item.is-active::after{transform:scaleX(1)}
.nav-item.is-active{color:var(--c-primary);font-weight:600}
.btn-cta-nav{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:42px;
  padding:0 18px;
  margin-left:8px;
  border-radius:var(--radius-btn);
  background:var(--c-primary);
  color:#fff;
  font-size:15px;
  font-weight:600;
  box-shadow:0 6px 16px rgba(29,91,214,.24);
  transition:background .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-cta-nav:hover{background:var(--c-primary-dark);color:#fff;box-shadow:var(--shadow-lg);transform:translateY(-2px)}
.btn-cta-nav:active{transform:translateY(1px)}
.nav-toggle{
  display:none;
  grid-column:3;
  justify-self:end;
  width:44px;height:44px;
  border-radius:var(--radius-btn);
  border:1px solid var(--c-line);
  background:#fff;
  color:var(--c-text);
  font-size:17px;
  align-items:center;
  justify-content:center;
  transition:border-color .2s ease,color .2s ease;
}
.nav-toggle:hover{border-color:var(--c-primary);color:var(--c-primary)}
.mobile-panel{
  display:flex;
  flex-direction:column;
  padding:8px 24px 20px;
  background:#fff;
  border-top:1px solid var(--c-line);
}
.mobile-panel .nav-item{
  height:48px;
  padding:0;
  font-size:15px;
  border-bottom:1px solid var(--c-line);
}
.mobile-panel .nav-item::after{display:none}
.mobile-panel .nav-item.is-active{color:var(--c-primary)}
.mobile-cta{margin-top:16px}
.mobile-cta .btn-cta-nav{width:100%;justify-content:center;height:48px}

/* ============ 文章头部 ============ */
.article-hero{
  position:relative;
  padding:36px 0 8px;
  background:
    linear-gradient(180deg,rgba(232,240,254,.75),rgba(245,248,253,0) 70%),
    url(/assets/images/backpic/back-2.webp) center/cover no-repeat;
}
.article-hero::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(245,248,253,.94) 0%,rgba(245,248,253,.80) 48%,rgba(245,248,253,.62) 100%);
  pointer-events:none;
}
.article-hero .container{position:relative;z-index:2}
.article-head{max-width:840px;margin:0 auto}

.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  list-style:none;
  padding:0;
  margin:0 0 20px;
  font-size:13.5px;
  color:var(--c-muted);
}
.crumb li{display:inline-flex;align-items:center;gap:8px}
.crumb li+li::before{content:"/";color:#B6C4DA}
.crumb a{color:var(--c-muted)}
.crumb a:hover{color:var(--c-primary)}
.crumb .is-current{color:var(--c-text);font-weight:600}

.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:28px;
  padding:0 14px;
  border-radius:999px;
  background:var(--c-primary-soft);
  color:var(--c-primary);
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.3px;
}
.chip:hover{background:#D8E5FD;color:var(--c-primary-dark)}

.article-title{
  font-size:44px;
  line-height:1.25;
  letter-spacing:.5px;
  margin:16px 0 18px;
  font-weight:800;
}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 18px;
  font-size:13.5px;
  color:var(--c-muted);
  padding-bottom:4px;
}
.article-meta span{display:inline-flex;align-items:center;gap:6px}
.article-meta i{color:#9DB0CB;font-size:13px}
.article-meta strong{color:var(--c-text);font-weight:600}

/* ============ 正文布局 ============ */
.article-main{padding:36px 0 24px}
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:22px;
}
.article-body{min-width:0}
.article-content{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);
  padding:38px 42px;
  font-size:16.5px;
  line-height:1.85;
  color:#1B2A44;
}
.article-content > *:first-child{margin-top:0}
.article-content > *:last-child{margin-bottom:0}
.article-content h2{
  position:relative;
  font-size:26px;
  line-height:1.4;
  margin:1.8em 0 .8em;
  padding-left:16px;
  scroll-margin-top:96px;
}
.article-content h2::before{
  content:"";
  position:absolute;
  left:0;top:.16em;bottom:.16em;
  width:4px;border-radius:4px;
  background:var(--c-primary);
}
.article-content h3{
  font-size:19px;
  font-weight:700;
  margin:1.6em 0 .6em;
  scroll-margin-top:96px;
}
.article-content p{margin:0 0 1.2em}
.article-content ul,.article-content ol{
  margin:0 0 1.2em;
  padding-left:1.5em;
}
.article-content li{margin:.4em 0}
.article-content ul li::marker{color:var(--c-primary)}
.article-content ol li::marker{color:var(--c-primary);font-weight:700}
.article-content blockquote{
  margin:1.5em 0;
  padding:16px 20px;
  background:var(--c-primary-soft);
  border-left:3px solid var(--c-primary);
  border-radius:0 12px 12px 0;
  color:#26405F;
}
.article-content blockquote p:last-child{margin-bottom:0}
.article-content img{
  border-radius:var(--radius-img);
  margin:1.5em auto;
  height:auto;
}
.article-content figure{margin:1.6em 0}
.article-content figcaption{
  font-size:13px;
  color:var(--c-muted);
  text-align:center;
  margin-top:10px;
}
.article-content a{
  color:var(--c-primary);
  text-decoration:underline;
  text-underline-offset:3px;
}
.article-content a:hover{color:var(--c-primary-dark)}
.article-content table{
  width:100%;
  border-collapse:collapse;
  margin:1.5em 0;
  font-size:15px;
}
.article-content th{
  background:var(--c-primary-soft);
  color:#1B2A44;
  font-weight:700;
  height:44px;
}
.article-content th,.article-content td{
  border:1px solid var(--c-line);
  padding:10px 14px;
  vertical-align:top;
}
.article-content hr{border:0;border-top:1px solid var(--c-line);margin:2em 0}
.article-content code{
  background:var(--c-bg);
  border:1px solid var(--c-line);
  border-radius:6px;
  padding:2px 6px;
  font-size:14px;
}

/* 空态 */
.empty-state{
  text-align:center;
  padding:56px 24px;
  background:var(--c-bg);
  border:1px dashed var(--c-line);
  border-radius:var(--radius-card);
}
.empty-state .empty-icon{
  width:64px;height:64px;
  margin:0 auto 18px;
  border-radius:20px;
  background:var(--c-primary-soft);
  color:var(--c-primary);
  display:grid;place-items:center;
  font-size:26px;
}
.empty-state h2{font-size:22px;margin-bottom:10px}
.empty-state p{color:var(--c-muted);font-size:15px;margin-bottom:20px}

/* ============ 目录 ============ */
.article-aside{min-width:0}
.toc-card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);
  padding:20px 20px 16px;
}
.toc-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  font-size:15px;
  font-weight:700;
  color:var(--c-text);
  margin-bottom:12px;
}
.toc-head i{color:var(--c-primary);margin-right:6px}
.toc-toggle{
  border:1px solid var(--c-line);
  background:#fff;
  color:var(--c-muted);
  font-size:12.5px;
  height:30px;
  padding:0 12px;
  border-radius:999px;
  transition:border-color .2s ease,color .2s ease;
}
.toc-toggle:hover{border-color:var(--c-primary);color:var(--c-primary)}
.toc-list{
  list-style:none;
  margin:0;
  padding:0;
  display:none;
  max-height:60vh;
  overflow:auto;
}
.toc-list.is-open{display:block}
.toc-item{margin:2px 0}
.toc-item a{
  display:block;
  padding:7px 12px;
  border-left:2px solid var(--c-line);
  font-size:14px;
  color:var(--c-muted);
  line-height:1.6;
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.toc-item a:hover,.toc-item a.is-active{
  color:var(--c-primary);
  border-left-color:var(--c-primary);
  background:var(--c-primary-soft);
  border-radius:0 8px 8px 0;
}
.toc-item--sub a{padding-left:24px;font-size:13.5px}

/* ============ 相关推荐 ============ */
.section{padding:64px 0}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  margin-bottom:32px;
}
.section-head h2{font-size:28px;line-height:1.35}
.section-head p{color:var(--c-muted);font-size:14.5px;margin:8px 0 0}
.link-more{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14.5px;
  font-weight:600;
  color:var(--c-primary);
  white-space:nowrap;
}
.link-more i{transition:transform .2s ease}
.link-more:hover i{transform:translateX(4px)}

.related-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.card-post{
  display:flex;
  flex-direction:column;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);
  overflow:hidden;
  transition:transform .2s ease,box-shadow .2s ease;
}
.card-post:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.thumb{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
  background:var(--c-primary-soft);
}
.thumb img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .2s ease;
}
.card-post:hover .thumb img{transform:scale(1.03)}
.thumb--43{aspect-ratio:4/3}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.tag{
  align-self:flex-start;
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 12px;
  border-radius:999px;
  background:var(--c-primary-soft);
  color:var(--c-primary);
  font-size:12px;
  font-weight:600;
  margin-bottom:12px;
}
.tag--teal{background:var(--c-teal-soft);color:#0C8B7E}
.tag--orange{background:var(--c-orange-soft);color:#D9571A}
.card-title{
  font-size:17px;
  font-weight:700;
  line-height:1.5;
  margin-bottom:10px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.card-post:hover .card-title{color:var(--c-primary)}
.card-text{
  font-size:14.5px;
  color:var(--c-muted);
  line-height:1.7;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  margin-bottom:16px;
}
.card-foot{
  margin-top:auto;
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--c-muted);
  padding-top:14px;
  border-top:1px solid var(--c-line);
}
.card-foot .dot{width:4px;height:4px;border-radius:50%;background:#C3D0E2}
.card-foot i.fa-arrow-right{margin-left:auto;color:var(--c-primary)}

/* ============ 上下篇 ============ */
.post-nav{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:20px;
  margin-top:20px;
}
.post-nav-link{
  display:block;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--radius-card);
  padding:20px 22px;
  box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.post-nav-link:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:#CBDDF9}
.pn-label{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--c-muted);
  margin-bottom:8px;
}
.post-nav-link--next .pn-label{justify-content:flex-end}
.pn-title{
  display:block;
  font-size:15.5px;
  font-weight:600;
  color:var(--c-text);
  line-height:1.6;
}
.post-nav-link--next{text-align:right}
.back-col{margin-top:24px;text-align:center}

/* ============ 按钮 ============ */
.btn-main{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  height:48px;
  padding:0 26px;
  border:none;
  border-radius:var(--radius-btn);
  background:var(--c-primary);
  color:#fff;
  font-size:15.5px;
  font-weight:600;
  box-shadow:0 8px 20px rgba(29,91,214,.22);
  transition:background .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-main:hover{background:var(--c-primary-dark);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.btn-main:active{transform:translateY(1px)}
.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  height:48px;
  padding:0 24px;
  border-radius:var(--radius-btn);
  background:#fff;
  border:1px solid var(--c-primary);
  color:var(--c-primary);
  font-size:15.5px;
  font-weight:600;
  transition:background .2s ease,color .2s ease,transform .2s ease;
}
.btn-ghost:hover{background:var(--c-primary-soft);color:var(--c-primary-dark);transform:translateY(-2px)}
.btn-accent{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  height:48px;
  padding:0 26px;
  border:none;
  border-radius:var(--radius-btn);
  background:var(--c-orange);
  color:#fff;
  font-size:15.5px;
  font-weight:600;
  box-shadow:0 8px 20px rgba(255,122,47,.24);
  transition:background .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-accent:hover{background:#E96720;color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.btn-main:focus-visible,.btn-ghost:focus-visible,.btn-accent:focus-visible{outline:3px solid rgba(29,91,214,.28);outline-offset:2px}

/* ============ CTA 条 ============ */
.cta-band{
  padding:56px 0;
  background:linear-gradient(180deg,#FFFFFF,var(--c-bg));
}
.cta-box{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:20px;
  box-shadow:var(--shadow-sm);
  padding:44px 48px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  position:relative;
  overflow:hidden;
}
.cta-box::before{
  content:"";
  position:absolute;
  right:-60px;top:-60px;
  width:220px;height:220px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(29,91,214,.10),rgba(29,91,214,0) 70%);
}
.cta-copy{position:relative;z-index:1}
.cta-copy h2{font-size:26px;margin-bottom:10px}
.cta-copy p{color:var(--c-muted);font-size:15px;margin:0}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;position:relative;z-index:1}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--c-footer);
  color:#C7D3E6;
  padding:64px 0 0;
  font-size:14px;
  margin-top:24px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.3fr;
  gap:40px;
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:16px;
}
.footer-brand .brand-mark{
  width:36px;height:36px;
  border-radius:11px;
  background:linear-gradient(135deg,#2C6BEA,#1D5BD6);
}
.footer-brand .brand-text{color:#fff;font-size:18px}
.footer-col p{color:#A9BAD3;font-size:14px;line-height:1.85;margin:0}
.footer-col h4{
  color:#fff;
  font-size:15.5px;
  margin:0 0 18px;
  letter-spacing:.3px;
}
.footer-col ul{list-style:none;padding:0;margin:0}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{color:#C7D3E6;font-size:14px}
.footer-col ul li a:hover{color:#fff;text-decoration:underline}
.footer-contact li{display:flex;align-items:flex-start;gap:10px;color:#A9BAD3;line-height:1.7}
.footer-contact i{color:#4E8BF0;margin-top:5px;font-size:13px}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  border-top:1px solid rgba(255,255,255,.12);
  margin-top:44px;
  padding:22px 0;
  font-size:13px;
  color:#8FA3C0;
}
.footer-bottom a{color:#C7D3E6}
.footer-bottom a:hover{color:#fff}

/* ============ 响应式 ============ */
@media (min-width:1200px){
  .article-layout{
    grid-template-columns:minmax(0,800px) 256px;
    gap:40px;
    justify-content:center;
    align-items:start;
  }
  .article-body{grid-column:1;grid-row:1}
  .article-aside{grid-column:2;grid-row:1}
  .toc-card{position:sticky;top:96px}
  .toc-list{display:block}
  .toc-toggle{display:none}
}
@media (max-width:1199.98px){
  .article-aside{order:-1}
  .article-body{max-width:840px;margin:0 auto;width:100%}
  .toc-card{position:static}
}
@media (max-width:991.98px){
  .nav-wrap{grid-template-columns:44px 1fr 44px;height:64px;gap:8px}
  .nav-side{display:none}
  .nav-toggle{display:inline-flex}
  .brand{grid-column:2;justify-self:center}
  .brand-text{font-size:17px}
  .brand-mark{width:34px;height:34px;font-size:16px}
  .article-title{font-size:34px}
  .article-content{padding:30px 26px;font-size:16px}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
  .cta-box{flex-direction:column;align-items:flex-start;padding:34px 30px}
  .section{padding:52px 0}
}
@media (max-width:767.98px){
  .container{padding:0 18px}
  .article-hero{padding:24px 0 4px}
  .article-title{font-size:28px;line-height:1.32}
  .article-content{
    padding:22px 18px;
    border-radius:14px;
    font-size:16px;
    line-height:1.85;
  }
  .article-content h2{font-size:21px;padding-left:13px}
  .article-content h3{font-size:17.5px}
  .article-content table{display:block;overflow-x:auto;white-space:nowrap}
  .post-nav{grid-template-columns:minmax(0,1fr)}
  .post-nav-link--next{text-align:left}
  .post-nav-link--next .pn-label{justify-content:flex-start}
  .section{padding:44px 0}
  .section-head{flex-direction:column;align-items:flex-start;margin-bottom:24px}
  .section-head h2{font-size:23px}
  .cta-copy h2{font-size:22px}
  .cta-actions{width:100%}
  .cta-actions .btn-main,.cta-actions .btn-ghost{width:100%}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:575.98px){
  .related-grid{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .article-meta{gap:6px 14px;font-size:13px}
  .article-content img{border-radius:10px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    transition-duration:.001ms !important;
    animation-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .card-post:hover,.post-nav-link:hover,.btn-main:hover,.btn-ghost:hover,.btn-accent:hover,.btn-cta-nav:hover{transform:none}
}

/* roulang page: category1 */
:root{
  --c-primary:#1D5BD6;
  --c-primary-hover:#1749B0;
  --c-primary-soft:#E8F0FE;
  --c-teal:#12B0A0;
  --c-teal-soft:#E4F7F5;
  --c-orange:#FF7A2F;
  --c-orange-soft:#FFF1E8;
  --c-bg:#F5F8FD;
  --c-surface:#FFFFFF;
  --c-line:#E3EAF5;
  --c-text:#16233A;
  --c-muted:#5A6B85;
  --container:1200px;
  --r-card:16px;
  --r-btn:10px;
  --r-img:12px;
  --sh-sm:0 8px 24px rgba(16,42,86,.06);
  --sh-lg:0 14px 36px rgba(16,42,86,.12);
  --tr:200ms ease;

  --bs-primary:#1D5BD6;
  --bs-primary-rgb:29,91,214;
  --bs-link-color:#1D5BD6;
  --bs-link-hover-color:#1749B0;
  --bs-body-font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  --bs-body-color:#16233A;
  --bs-body-bg:#F5F8FD;
  --bs-border-radius:10px;
  --bs-border-color:#E3EAF5;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:92px;}
body{
  margin:0;
  font-family:var(--bs-body-font-family);
  font-size:16px;
  line-height:1.8;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.35;color:var(--c-text);letter-spacing:-.2px;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
a{color:var(--c-primary);text-decoration:none;transition:color var(--tr);}
a:hover{color:var(--c-primary-hover);}
img{max-width:100%;display:block;}
button{font-family:inherit;}
:focus-visible{outline:3px solid rgba(29,91,214,.25);outline-offset:2px;border-radius:8px;}

.container{max-width:var(--container);width:100%;margin:0 auto;padding:0 24px;}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.97);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:box-shadow var(--tr),border-color var(--tr);
}
.site-header.is-scrolled{border-bottom-color:var(--c-line);box-shadow:0 6px 20px rgba(16,42,86,.06);}
.nav-wrap{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;height:72px;position:relative;transition:height var(--tr);
}
.site-header.is-scrolled .nav-wrap{height:64px;}
.nav-side{display:flex;align-items:center;gap:4px;}
.nav-side--left{flex:1 1 0;justify-content:flex-start;}
.nav-side--right{flex:1 1 0;justify-content:flex-end;gap:10px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--c-text);white-space:nowrap;}
.brand:hover{color:var(--c-text);}
.brand-mark{
  width:38px;height:38px;border-radius:11px;
  background:linear-gradient(135deg,#2E6BE6,#1D5BD6);
  color:#fff;display:grid;place-items:center;
  font-weight:800;font-size:19px;line-height:1;
  box-shadow:0 6px 16px rgba(29,91,214,.28);
}
.brand-text{font-size:20px;font-weight:800;letter-spacing:.4px;}
.nav-item{
  position:relative;display:inline-flex;align-items:center;gap:6px;
  height:40px;padding:0 12px;font-size:15px;font-weight:500;
  color:var(--c-text);border-radius:8px;
  transition:color var(--tr),background var(--tr);
}
.nav-item:hover{color:var(--c-primary);background:var(--c-primary-soft);}
.nav-item.is-active{color:var(--c-primary);font-weight:700;}
.nav-item.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;
  height:3px;border-radius:3px;background:var(--c-primary);
}
.btn-cta-nav{
  display:inline-flex;align-items:center;gap:8px;height:42px;padding:0 18px;
  border-radius:var(--r-btn);background:var(--c-primary);color:#fff;
  font-size:15px;font-weight:600;box-shadow:0 6px 16px rgba(29,91,214,.22);
  transition:background var(--tr),transform var(--tr),box-shadow var(--tr);
}
.btn-cta-nav:hover{background:var(--c-primary-hover);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-lg);}
.btn-cta-nav:active{transform:translateY(1px);box-shadow:none;}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--c-line);
  background:#fff;border-radius:10px;color:var(--c-text);font-size:17px;cursor:pointer;
  transition:border-color var(--tr),color var(--tr);
}
.nav-toggle:hover{border-color:var(--c-primary);color:var(--c-primary);}
.mobile-panel{
  padding:10px 24px 22px;border-top:1px solid var(--c-line);
  background:#fff;display:flex;flex-direction:column;gap:2px;
}
.mobile-panel .nav-item{height:48px;justify-content:flex-start;border-radius:10px;}
.mobile-panel .nav-item.is-active{background:var(--c-primary-soft);}
.mobile-panel .nav-item.is-active::after{display:none;}
.mobile-cta{margin-top:12px;}
.mobile-cta .btn-cta-nav{width:100%;justify-content:center;height:48px;}

/* ---------- Buttons ---------- */
.btn-main,.btn-outline,.btn-accent{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:background var(--tr),color var(--tr),box-shadow var(--tr),transform var(--tr),border-color var(--tr);
}
.btn-main{background:var(--c-primary);border-color:var(--c-primary);color:#fff;}
.btn-main:hover{background:var(--c-primary-hover);border-color:var(--c-primary-hover);color:#fff;box-shadow:0 12px 26px rgba(29,91,214,.26);transform:translateY(-2px);}
.btn-main:active{transform:translateY(1px);box-shadow:none;}
.btn-outline{background:#fff;border-color:#C9D9F3;color:var(--c-primary);}
.btn-outline:hover{background:var(--c-primary-soft);border-color:var(--c-primary);color:var(--c-primary);transform:translateY(-2px);}
.btn-outline:active{transform:translateY(1px);}
.btn-accent{background:var(--c-orange);border-color:var(--c-orange);color:#fff;}
.btn-accent:hover{background:#EE6A1E;border-color:#EE6A1E;color:#fff;box-shadow:0 12px 26px rgba(255,122,47,.28);transform:translateY(-2px);}
.btn-accent:active{transform:translateY(1px);box-shadow:none;}
.btn-text{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--c-primary);}
.btn-text i{transition:transform var(--tr);}
.btn-text:hover i{transform:translateX(4px);}
.btn-sm{height:42px;padding:0 18px;font-size:14px;}

/* ---------- Badges ---------- */
.badge-soft,.badge-teal,.badge-orange{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;
  border-radius:999px;font-size:12px;font-weight:600;line-height:1;
  white-space:nowrap;
}
.badge-soft{background:var(--c-primary-soft);color:var(--c-primary);}
.badge-teal{background:var(--c-teal-soft);color:#0B8A7D;}
.badge-orange{background:var(--c-orange-soft);color:#D95F17;}

/* ---------- Section shell ---------- */
.section{padding:88px 0;}
.section--white{background:var(--c-surface);}
.section--soft{background:var(--c-bg);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:1.5px;color:var(--c-primary);
  margin-bottom:12px;
}
.eyebrow::before{content:"";width:22px;height:3px;border-radius:3px;background:var(--c-primary);}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;margin-bottom:40px;
}
.section-head h2{font-size:28px;}
.section-head p{color:var(--c-muted);font-size:15px;margin-top:10px;max-width:680px;}

/* ---------- Category hero ---------- */
.cat-hero{position:relative;overflow:hidden;background:var(--c-surface);border-bottom:1px solid var(--c-line);}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;opacity:.07;
}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(255,255,255,.97) 0%,rgba(245,248,253,.9) 52%,rgba(232,240,254,.72) 100%);
}
.cat-hero .container{position:relative;z-index:1;}
.breadcrumb-row{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:14px;color:var(--c-muted);padding:20px 0 8px;
}
.breadcrumb-row a{color:var(--c-muted);}
.breadcrumb-row a:hover{color:var(--c-primary);}
.breadcrumb-row .sep{color:#B9C5D8;}
.breadcrumb-row .current{color:var(--c-text);font-weight:600;}
.cat-hero-grid{
  display:grid;grid-template-columns:1.35fr .85fr;gap:48px;
  align-items:center;padding:20px 0 64px;
}
.cat-hero h1{font-size:44px;line-height:1.24;margin:16px 0 20px;}
.cat-hero .lead{font-size:16.5px;color:var(--c-muted);max-width:640px;}
.cat-hero .lead + .lead{margin-top:12px;}
.cat-hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px;}
.cat-hero-side{position:relative;}
.cat-hero-img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--r-card);box-shadow:var(--sh-lg);
  border:1px solid var(--c-line);
}
.hero-tip{
  position:absolute;left:18px;right:18px;bottom:-18px;
  display:flex;align-items:center;gap:10px;
  background:#fff;border:1px solid var(--c-line);border-radius:14px;
  padding:12px 16px;font-size:13px;color:var(--c-muted);
  box-shadow:var(--sh-sm);
}
.hero-tip i{color:var(--c-teal);font-size:15px;}

/* ---------- Overview ---------- */
.overview-grid{display:grid;grid-template-columns:5fr 7fr;gap:24px;align-items:stretch;}
.overview-lead{
  display:flex;flex-direction:column;
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-sm);
}
.overview-lead img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.overview-lead .body{padding:24px;display:flex;flex-direction:column;gap:14px;flex:1;}
.overview-lead h3{font-size:20px;}
.overview-lead p{font-size:14.5px;color:var(--c-muted);line-height:1.8;}
.lead-stats{display:flex;gap:26px;margin-top:auto;padding-top:18px;border-top:1px dashed var(--c-line);flex-wrap:wrap;}
.lead-stats b{display:block;font-size:24px;font-weight:800;color:var(--c-primary);line-height:1.2;}
.lead-stats span{font-size:13px;color:var(--c-muted);}
.overview-facts{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.fact-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-sm);
  transition:transform var(--tr),box-shadow var(--tr),border-color var(--tr);
}
.fact-card:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);border-color:#D2E0F7;}
.fact-card .ico{
  width:44px;height:44px;border-radius:12px;background:var(--c-primary-soft);
  color:var(--c-primary);display:grid;place-items:center;font-size:18px;margin-bottom:16px;
}
.fact-card h3{font-size:18px;margin-bottom:8px;}
.fact-card p{font-size:14.5px;color:var(--c-muted);line-height:1.78;}

/* ---------- Activity cards ---------- */
.act-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.act-card{
  display:flex;flex-direction:column;background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-sm);
  transition:transform var(--tr),box-shadow var(--tr),border-color var(--tr);
}
.act-card:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);border-color:#D2E0F7;}
.act-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:#EEF3FB;}
.act-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 400ms ease;}
.act-card:hover .act-thumb img{transform:scale(1.04);}
.act-thumb .tag{position:absolute;left:14px;top:14px;}
.act-thumb .state{position:absolute;right:14px;top:14px;}
.act-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.act-body h3{font-size:18px;line-height:1.5;}
.act-body p{
  font-size:14.5px;color:var(--c-muted);line-height:1.78;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.act-meta{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  margin-top:auto;padding-top:14px;border-top:1px dashed var(--c-line);
  font-size:13px;color:var(--c-muted);
}
.act-meta .dot{color:#C3CFE2;}

/* ---------- Pagination ---------- */
.pagination{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin:40px 0 0;}
.pagination .page-item{margin:0;}
.pagination .page-link{
  display:grid;place-items:center;min-width:42px;height:42px;padding:0 14px;
  border:1px solid var(--c-line);border-radius:10px;background:#fff;
  color:var(--c-text);font-size:14px;font-weight:600;
  transition:all var(--tr);box-shadow:none;
}
.pagination .page-link:hover{background:var(--c-primary-soft);border-color:var(--c-primary);color:var(--c-primary);}
.pagination .page-item.active .page-link{background:var(--c-primary);border-color:var(--c-primary);color:#fff;}
.pagination .page-item.disabled .page-link{background:#F2F5FB;border-color:var(--c-line);color:#AEBACE;}

/* ---------- Steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.step{position:relative;padding-top:4px;}
.step-num{
  width:52px;height:52px;border-radius:14px;background:var(--c-surface);
  border:1px solid var(--c-line);color:var(--c-primary);
  display:grid;place-items:center;font-size:20px;font-weight:800;
  box-shadow:var(--sh-sm);position:relative;z-index:1;
}
.step:not(:last-child)::after{
  content:"";position:absolute;left:66px;right:-14px;top:30px;
  height:2px;border-radius:2px;
  background:linear-gradient(90deg,#CFDDF5,rgba(207,221,245,0));
}
.step h3{font-size:18px;margin:18px 0 8px;}
.step p{font-size:14.5px;color:var(--c-muted);line-height:1.78;}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px;}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:14px;
  overflow:hidden;box-shadow:var(--sh-sm);transition:box-shadow var(--tr),border-color var(--tr);
}
.faq-item:hover{box-shadow:var(--sh-lg);border-color:#D2E0F7;}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;
  padding:18px 20px;background:none;border:0;text-align:left;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--c-text);line-height:1.6;
}
.faq-idx{
  flex:0 0 auto;width:30px;height:30px;border-radius:8px;
  background:#EFF3FA;color:var(--c-muted);
  display:grid;place-items:center;font-size:13px;font-weight:700;
  transition:background var(--tr),color var(--tr);
}
.faq-q[aria-expanded="true"] .faq-idx{background:var(--c-primary);color:#fff;}
.faq-text{flex:1;}
.faq-icon{color:var(--c-muted);font-size:14px;transition:transform var(--tr),color var(--tr);}
.faq-q[aria-expanded="true"] .faq-icon{transform:rotate(45deg);color:var(--c-primary);}
.faq-a{
  position:relative;padding:0 20px 22px 64px;
  font-size:15px;line-height:1.85;color:var(--c-muted);
}
.faq-a::before{
  content:"";position:absolute;left:34px;top:4px;bottom:20px;
  width:3px;border-radius:3px;background:var(--c-primary);
}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;overflow:hidden;text-align:center;
  background:linear-gradient(120deg,#EDF3FE 0%,#E8F0FE 48%,#E4F7F5 100%);
  border:1px solid #D8E5FA;border-radius:20px;
  padding:56px 32px;box-shadow:var(--sh-sm);
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;
  border-radius:50%;background:rgba(29,91,214,.07);
}
.cta-band h2{font-size:28px;margin-bottom:14px;position:relative;z-index:1;}
.cta-band p{font-size:15.5px;color:var(--c-muted);max-width:640px;margin:0 auto;position:relative;z-index:1;}
.cta-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:30px;position:relative;z-index:1;}

/* ---------- Footer ---------- */
.site-footer{background:#0F1B2E;color:#C6D2E4;padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-mark{
  width:34px;height:34px;font-size:16px;border-radius:10px;
  background:linear-gradient(135deg,#2E6BE6,#1D5BD6);box-shadow:none;
}
.footer-brand .brand-text{color:#fff;font-size:18px;}
.footer-col p{font-size:14px;line-height:1.85;color:#93A3BC;}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:18px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col ul a{color:#93A3BC;font-size:14px;}
.footer-col ul a:hover{color:#fff;text-decoration:underline;}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:#93A3BC;align-items:flex-start;line-height:1.7;}
.footer-contact i{color:#5C6E8C;margin-top:5px;font-size:13px;}
.footer-bottom{
  margin-top:48px;border-top:1px solid rgba(255,255,255,.08);
  padding:20px 0 26px;display:flex;justify-content:space-between;
  gap:16px;flex-wrap:wrap;font-size:13px;color:#7C8CA6;
}
.footer-bottom a{color:#A9B8CE;}
.footer-bottom a:hover{color:#fff;text-decoration:underline;}

/* ---------- Responsive ---------- */
@media (max-width:1199.98px){
  .cat-hero h1{font-size:38px;}
}
@media (max-width:991.98px){
  .section{padding:64px 0;}
  .nav-side{display:none;}
  .nav-wrap{display:grid;grid-template-columns:44px 1fr 44px;align-items:center;height:64px;gap:8px;}
  .brand{position:static;transform:none;justify-self:center;}
  .brand-text{font-size:17px;}
  .brand-mark{width:32px;height:32px;font-size:16px;border-radius:9px;}
  .nav-toggle{display:grid;place-items:center;justify-self:end;}
  .cat-hero-grid{grid-template-columns:1fr;gap:36px;padding-bottom:56px;}
  .cat-hero h1{font-size:32px;}
  .overview-grid{grid-template-columns:1fr;}
  .act-grid{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:repeat(2,1fr);gap:28px;}
  .step:not(:last-child)::after{display:none;}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px;}
}
@media (max-width:767.98px){
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;}
  .section-head h2{font-size:23px;}
  .cta-band{padding:42px 22px;}
  .cta-band h2{font-size:23px;}
}
@media (max-width:575.98px){
  .container{padding:0 16px;}
  .section{padding:44px 0;}
  .cat-hero h1{font-size:28px;}
  .cat-hero .lead{font-size:15px;}
  .cat-hero-actions{gap:10px;}
  .cat-hero-actions .btn-main,.cat-hero-actions .btn-outline{width:100%;}
  .act-grid{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .overview-facts{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .faq-a{padding:0 18px 20px 18px;}
  .faq-a::before{display:none;}
  .faq-q{padding:16px;gap:10px;}
  .cta-actions .btn-main,.cta-actions .btn-accent,.cta-actions .btn-outline{width:100%;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none !important;animation:none !important;}
  html{scroll-behavior:auto;}
  .act-card:hover,.fact-card:hover,.btn-main:hover,.btn-outline:hover,.btn-accent:hover{transform:none;}
  .act-card:hover .act-thumb img{transform:none;}
}

/* roulang page: category2 */
:root{
  --c-primary:#1D5BD6;
  --c-primary-hover:#1749B0;
  --c-primary-soft:#E8F0FE;
  --c-teal:#12B0A0;
  --c-teal-soft:#E4F7F4;
  --c-orange:#FF7A2F;
  --c-orange-soft:#FFF1E8;
  --c-bg:#F5F8FD;
  --c-surface:#FFFFFF;
  --c-line:#E3EAF5;
  --c-text:#16233A;
  --c-muted:#5A6B85;
  --c-track:#E7EEF9;
  --c-footer:#0F1B2E;
  --container:1200px;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-1:0 8px 24px rgba(16,42,86,.06);
  --shadow-2:0 14px 36px rgba(16,42,86,.12);
  --t:200ms ease;

  --bs-primary:#1D5BD6;
  --bs-primary-rgb:29,91,214;
  --bs-link-color:#1D5BD6;
  --bs-link-hover-color:#1749B0;
  --bs-body-color:#16233A;
  --bs-body-bg:#F5F8FD;
  --bs-border-color:#E3EAF5;
  --bs-border-radius:10px;
  --bs-body-font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  --bs-font-sans-serif:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35;color:var(--c-text);}
h1{font-size:40px;line-height:1.28;font-weight:800;letter-spacing:-.4px;}
h2{font-size:28px;line-height:1.36;font-weight:800;letter-spacing:-.2px;}
h3{font-size:20px;line-height:1.5;font-weight:700;}
p{margin:0;}
a{color:var(--c-primary);text-decoration:none;transition:color var(--t);}
a:hover{color:var(--c-primary-hover);}
img{max-width:100%;height:auto;display:block;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:3px solid rgba(29,91,214,.25);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:88px 0;}
.section--tight{padding:64px 0;}
.section--surface{background:var(--c-surface);}
.section--soft{background:var(--c-bg);}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  height:30px;padding:0 14px;border-radius:999px;
  background:var(--c-primary-soft);color:var(--c-primary);
  font-size:13px;font-weight:600;letter-spacing:.4px;
}
.section-head{max-width:760px;margin:0 0 40px;}
.section-head p{margin-top:14px;color:var(--c-muted);font-size:15.5px;}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center;}

/* 按钮 */
.btn-main,.btn-ghost,.btn-accent{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  cursor:pointer;transition:background var(--t),color var(--t),box-shadow var(--t),transform var(--t),border-color var(--t);
  text-decoration:none;white-space:nowrap;
}
.btn-main{background:var(--c-primary);color:#fff;box-shadow:0 10px 22px rgba(29,91,214,.24);}
.btn-main:hover{background:var(--c-primary-hover);color:#fff;box-shadow:0 14px 30px rgba(29,91,214,.3);transform:translateY(-2px);}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:#C9DAF7;}
.btn-ghost:hover{background:var(--c-primary-soft);color:var(--c-primary-hover);border-color:var(--c-primary);}
.btn-accent{background:var(--c-orange);color:#fff;box-shadow:0 10px 24px rgba(255,122,47,.28);}
.btn-accent:hover{background:#EF6A1E;color:#fff;transform:translateY(-2px);box-shadow:0 14px 30px rgba(255,122,47,.34);}
.btn-main:active,.btn-ghost:active,.btn-accent:active{transform:translateY(1px);}
.btn-lg{height:54px;padding:0 32px;font-size:16px;border-radius:12px;}

.link-arrow{display:inline-flex;align-items:center;gap:8px;font-size:14.5px;font-weight:600;color:var(--c-primary);}
.link-arrow i{transition:transform var(--t);}
.link-arrow:hover i{transform:translateX(4px);}

/* 徽章 / 标签 */
.badge-soft,.badge-teal,.badge-orange{
  display:inline-flex;align-items:center;gap:6px;
  height:24px;padding:0 12px;border-radius:999px;
  font-size:12px;font-weight:600;line-height:1;
}
.badge-soft{background:var(--c-primary-soft);color:var(--c-primary);}
.badge-teal{background:var(--c-teal-soft);color:#0C8C80;}
.badge-orange{background:var(--c-orange-soft);color:#E2651F;}

/* 导航 */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid transparent;
  transition:box-shadow var(--t),border-color var(--t);
}
.site-header.is-scrolled{border-bottom-color:var(--c-line);box-shadow:0 6px 20px rgba(16,42,86,.07);}
.nav-wrap{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  gap:20px;height:72px;transition:height var(--t);
}
.site-header.is-scrolled .nav-wrap{height:64px;}
.nav-side{display:flex;align-items:center;gap:4px;}
.nav-side--left{justify-content:flex-end;}
.nav-side--right{justify-content:flex-start;}
.nav-item{
  position:relative;display:inline-flex;align-items:center;height:40px;
  padding:0 14px;border-radius:10px;font-size:15px;font-weight:500;
  color:var(--c-text);transition:color var(--t),background var(--t);
}
.nav-item:hover{color:var(--c-primary);background:var(--c-primary-soft);}
.nav-item.is-active{color:var(--c-primary);}
.nav-item.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:1px;height:3px;
  border-radius:3px;background:var(--c-primary);
}
.brand{display:inline-flex;align-items:center;gap:10px;white-space:nowrap;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,#1D5BD6,#3A83F0);
  color:#fff;font-size:17px;font-weight:800;
  box-shadow:0 8px 18px rgba(29,91,214,.28);
}
.brand-text{font-size:18px;font-weight:800;letter-spacing:.3px;color:var(--c-text);}
.btn-cta-nav{
  display:inline-flex;align-items:center;gap:7px;height:40px;padding:0 18px;
  border-radius:999px;background:var(--c-primary);color:#fff;
  font-size:14px;font-weight:600;
  transition:background var(--t),box-shadow var(--t),transform var(--t);
}
.btn-cta-nav:hover{background:var(--c-primary-hover);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(29,91,214,.28);}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--c-line);border-radius:12px;
  background:#fff;color:var(--c-text);font-size:17px;
}
.mobile-panel{display:flex;flex-direction:column;padding:12px 24px 24px;background:#fff;border-top:1px solid var(--c-line);}
.mobile-panel .nav-item{height:48px;justify-content:flex-start;border-radius:10px;}
.mobile-panel .nav-item.is-active{background:var(--c-primary-soft);}
.mobile-panel .nav-item.is-active::after{display:none;}
.mobile-cta{margin-top:12px;}
.mobile-cta .btn-cta-nav{width:100%;justify-content:center;height:48px;border-radius:12px;}

/* 页面头 */
.page-hero{
  position:relative;
  padding:48px 0 72px;
  background:
    linear-gradient(96deg,rgba(255,255,255,.95) 0%,rgba(255,255,255,.86) 52%,rgba(245,248,253,.78) 100%),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-bottom:1px solid var(--c-line);
  overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;right:-60px;top:-40px;width:320px;height:320px;
  background-image:radial-gradient(rgba(29,91,214,.16) 1.5px,transparent 1.5px);
  background-size:16px 16px;opacity:.6;pointer-events:none;
}
.page-hero__grid{
  display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;position:relative;z-index:2;
}
.crumb{display:flex;align-items:center;flex-wrap:wrap;gap:10px;font-size:14px;color:var(--c-muted);margin-bottom:20px;}
.crumb a{color:var(--c-muted);}
.crumb a:hover{color:var(--c-primary);}
.crumb i{font-size:11px;color:#A8B6CC;}
.crumb span{color:var(--c-text);font-weight:600;}
.page-hero h1{margin:16px 0 18px;max-width:620px;}
.page-hero__desc{max-width:600px;color:var(--c-muted);font-size:16px;}
.page-hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.page-hero__media{position:relative;}
.page-hero__media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-card);
  border:1px solid var(--c-line);box-shadow:var(--shadow-1);
}
.media-note{
  position:absolute;left:18px;bottom:18px;
  display:flex;align-items:center;gap:10px;
  background:rgba(255,255,255,.94);border:1px solid var(--c-line);
  border-radius:14px;padding:12px 16px;box-shadow:var(--shadow-1);
}
.media-note strong{font-size:20px;font-weight:800;color:var(--c-primary);}
.media-note span{font-size:13px;color:var(--c-muted);line-height:1.4;}

/* 标签行 */
.tag-bar-wrap{background:var(--c-surface);border-bottom:1px solid var(--c-line);}
.tag-bar{display:flex;align-items:center;gap:10px;overflow-x:auto;padding:18px 0;scrollbar-width:none;}
.tag-bar::-webkit-scrollbar{display:none;}
.tag-bar__label{flex:0 0 auto;font-size:14px;font-weight:600;color:var(--c-muted);padding-right:6px;}
.tag-chip{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:7px;
  height:38px;padding:0 18px;border-radius:999px;
  border:1px solid var(--c-line);background:#fff;color:var(--c-muted);
  font-size:14px;font-weight:500;
  transition:background var(--t),color var(--t),border-color var(--t),box-shadow var(--t),transform var(--t);
}
.tag-chip:hover{color:var(--c-primary);border-color:#C9DAF7;background:var(--c-primary-soft);transform:translateY(-1px);}
.tag-chip.is-active{background:var(--c-primary);border-color:var(--c-primary);color:#fff;box-shadow:0 10px 20px rgba(29,91,214,.24);}

/* 交错图文列表 */
.alt-list{display:flex;flex-direction:column;gap:56px;}
.alt-row{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;}
.alt-row--reverse .alt-row__media{order:2;}
.alt-row__media{
  position:relative;border-radius:var(--radius-card);overflow:hidden;
  border:1px solid var(--c-line);background:var(--c-surface);box-shadow:var(--shadow-1);
  transition:box-shadow var(--t),transform var(--t);
}
.alt-row__media:hover{box-shadow:var(--shadow-2);transform:translateY(-4px);}
.alt-row__media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform 320ms ease;}
.alt-row__media:hover img{transform:scale(1.03);}
.alt-row__tag{
  position:absolute;left:16px;top:16px;
}
.alt-row__body{position:relative;padding-left:8px;}
.alt-row__index{
  position:absolute;left:-6px;top:-38px;
  font-size:72px;font-weight:800;line-height:1;color:rgba(29,91,214,.07);
  letter-spacing:-2px;pointer-events:none;
}
.alt-row__body h3{margin:14px 0 12px;font-size:22px;}
.alt-row__body p{color:var(--c-muted);font-size:15.5px;}
.alt-points{margin:18px 0 20px;display:flex;flex-direction:column;gap:10px;}
.alt-points li{position:relative;padding-left:22px;font-size:14.5px;color:var(--c-text);}
.alt-points li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:3px;
  background:var(--c-teal);
}
.alt-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px;}

/* 重点说明 / 数据卡 */
.detail-grid{display:grid;grid-template-columns:5fr 7fr;gap:44px;align-items:start;}
.detail-text h2{margin-bottom:18px;}
.detail-text p{color:var(--c-muted);font-size:15.5px;}
.detail-list{margin-top:26px;display:flex;flex-direction:column;gap:16px;}
.detail-list li{
  display:flex;gap:14px;padding:16px 18px;border-radius:14px;
  background:var(--c-surface);border:1px solid var(--c-line);box-shadow:var(--shadow-1);
}
.detail-list i{
  flex:0 0 auto;width:36px;height:36px;border-radius:10px;display:grid;place-items:center;
  background:var(--c-primary-soft);color:var(--c-primary);font-size:15px;
}
.detail-list strong{display:block;font-size:15.5px;margin-bottom:2px;}
.detail-list span{font-size:14px;color:var(--c-muted);}

.data-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-card);
  padding:28px;box-shadow:var(--shadow-1);
}
.data-card__head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:22px;}
.data-card__head h3{font-size:18px;}
.data-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:26px;}
.data-cell{
  background:var(--c-bg);border:1px solid var(--c-line);border-radius:14px;
  padding:16px;text-align:center;
}
.data-cell b{display:block;font-size:26px;font-weight:800;color:var(--c-primary);line-height:1.2;}
.data-cell span{display:block;margin-top:6px;font-size:13px;color:var(--c-muted);line-height:1.5;}
.progress-block{margin-bottom:22px;}
.progress-block__row{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px;font-size:14px;color:var(--c-muted);}
.progress-block__row strong{color:var(--c-text);}
.progress-track{height:8px;border-radius:999px;background:var(--c-track);overflow:hidden;}
.progress-fill{
  height:100%;width:0;border-radius:999px;
  background:linear-gradient(90deg,#1D5BD6,#3A83F0);
  transition:width 400ms ease;
}
.progress-fill--teal{background:linear-gradient(90deg,#12B0A0,#39CBB8);}
.data-legend{display:flex;flex-direction:column;gap:12px;margin-top:6px;}
.data-legend li{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:14.5px;padding:12px 14px;border-radius:12px;background:var(--c-bg);}
.data-legend li span:first-child{color:var(--c-muted);}
.data-legend li span:last-child{font-weight:600;}

/* FAQ */
.faq-grid{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start;}
.faq-intro p{margin-top:16px;color:var(--c-muted);font-size:15.5px;}
.faq-intro .btn-main{margin-top:26px;}
.accordion-item{
  border:1px solid var(--c-line)!important;border-radius:14px!important;
  background:var(--c-surface);margin-bottom:12px;overflow:hidden;
  box-shadow:var(--shadow-1);
}
.accordion-button{
  display:flex;align-items:center;gap:14px;
  padding:18px 20px;font-size:16px;font-weight:600;color:var(--c-text);
  background:var(--c-surface)!important;box-shadow:none!important;
}
.accordion-button:not(.collapsed){color:var(--c-primary);background:var(--c-surface)!important;}
.accordion-button::after{display:none;}
.faq-num{
  flex:0 0 auto;width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:var(--c-bg);color:var(--c-muted);font-size:14px;font-weight:700;
  transition:background var(--t),color var(--t);
}
.accordion-button:not(.collapsed) .faq-num{background:var(--c-primary);color:#fff;}
.faq-plus{margin-left:auto;font-size:15px;color:var(--c-muted);transition:transform var(--t),color var(--t);}
.accordion-button:not(.collapsed) .faq-plus{transform:rotate(45deg);color:var(--c-primary);}
.accordion-body{
  position:relative;padding:4px 24px 22px 68px;
  font-size:15px;line-height:1.8;color:var(--c-muted);
}
.accordion-body::before{
  content:"";position:absolute;left:34px;top:6px;bottom:24px;width:3px;border-radius:3px;background:var(--c-primary-soft);
}

/* CTA */
.cta-band{
  background:var(--c-primary-soft);
  border-radius:24px;padding:52px 32px;text-align:center;
  border:1px solid #D6E4FB;
}
.cta-band h2{max-width:660px;margin:0 auto 14px;}
.cta-band p{max-width:640px;margin:0 auto;color:var(--c-muted);font-size:15.5px;}
.cta-band__actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:30px;}
.cta-band__foot{margin-top:18px;font-size:13.5px;color:var(--c-muted);}

/* 页脚 */
.site-footer{background:var(--c-footer);color:#B9C6DB;padding:64px 0 28px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-text{color:#fff;font-size:17px;}
.footer-col p{font-size:14px;line-height:1.8;color:#9BAAC4;}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px;font-weight:700;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col ul a{color:#B9C6DB;font-size:14px;}
.footer-col ul a:hover{color:#FFFFFF;text-decoration:underline;}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:#9BAAC4;line-height:1.7;}
.footer-contact i{color:#4C8BF5;margin-top:5px;}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);
  font-size:13px;color:#8797B3;
}
.footer-bottom a{color:#B9C6DB;}
.footer-bottom a:hover{color:#fff;}

/* 响应式 */
@media (max-width:1199.98px){
  h1{font-size:34px;}
  .page-hero__grid{gap:36px;}
  .footer-grid{grid-template-columns:1.6fr 1fr 1fr;gap:28px;}
}
@media (max-width:991.98px){
  .nav-side{display:none;}
  .nav-wrap{grid-template-columns:44px 1fr 44px;gap:12px;}
  .brand{justify-self:center;}
  .nav-toggle{display:grid;place-items:center;justify-self:start;}
  .nav-wrap::after{content:"";display:block;width:44px;}
  .page-hero__grid{grid-template-columns:1fr;gap:30px;}
  .page-hero{padding:36px 0 52px;}
  .page-hero h1{font-size:30px;}
  .page-hero__desc{font-size:15.5px;}
  .alt-row{grid-template-columns:1fr;gap:22px;}
  .alt-row--reverse .alt-row__media{order:0;}
  .alt-row__index{position:static;display:block;margin-bottom:4px;font-size:52px;}
  .detail-grid{grid-template-columns:1fr;gap:30px;}
  .faq-grid{grid-template-columns:1fr;gap:26px;}
  .section{padding:64px 0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767.98px){
  h1{font-size:27px;}
  h2{font-size:23px;}
  h3{font-size:18px;}
  .section{padding:48px 0;}
  .container{padding:0 18px;}
  .page-hero__actions{gap:12px;}
  .page-hero__actions .btn-main,.page-hero__actions .btn-ghost{width:100%;}
  .data-grid{grid-template-columns:1fr;gap:12px;}
  .data-cell{text-align:left;display:flex;align-items:center;gap:14px;}
  .data-cell b{font-size:22px;}
  .data-cell span{margin-top:0;}
  .cta-band{padding:36px 20px;border-radius:18px;}
  .cta-band__actions .btn-main,.cta-band__actions .btn-accent{width:100%;}
  .alt-list{gap:40px;}
  .accordion-body{padding-left:24px;}
  .accordion-body::before{display:none;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:.01ms!important;animation-duration:.01ms!important;}
  .alt-row__media:hover{transform:none;}
  .alt-row__media:hover img{transform:none;}
}