/* roulang page: index */
:root{
  --c-primary:#2C6BED;
  --c-primary-deep:#1B4FBF;
  --c-primary-soft:#EDF3FE;
  --c-accent:#0FB39A;
  --c-hot:#FF7A45;
  --c-text:#1B2A3D;
  --c-text-2:#5C7285;
  --c-line:#E2EAF3;
  --c-line-hover:#C9DCFB;
  --c-bg:#F6F9FD;
  --c-card:#FFFFFF;
  --c-alt:#F2F7FE;
  --c-danger:#E5484D;
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,42,67,.06);
  --sh-2:0 8px 24px rgba(16,42,67,.10);
  --sh-3:0 4px 16px rgba(16,42,67,.08);
  --container:1200px;
  --gutter:24px;
  --sec-pad:88px;
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:system-ui,Inter,"PingFang SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:var(--c-primary);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--c-primary-deep)}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer;border:none;background:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
h1{font-size:clamp(28px,4.2vw,44px);line-height:1.25;font-weight:700;letter-spacing:0}
h2{font-size:clamp(22px,2.6vw,32px);line-height:1.35;font-weight:700;letter-spacing:0}
h3{font-size:20px;line-height:1.5;font-weight:600}
h4{font-size:17px;line-height:1.6;font-weight:600}
p{font-size:16px;line-height:1.85;color:var(--c-text-2)}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 var(--gutter)}
.section{padding:var(--sec-pad) 0}
.section-alt{background:var(--c-alt)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px;flex-wrap:wrap}
.sec-head .sec-title{max-width:680px}
.sec-head h2{margin-bottom:10px}
.sec-head p{font-size:15px;color:var(--c-text-2)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--c-primary);
  background:var(--c-primary-soft);
  padding:5px 14px;border-radius:var(--r-pill);margin-bottom:14px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-accent);display:block}
.link-more{font-size:14px;font-weight:600;color:var(--c-primary);display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.link-more:hover{color:var(--c-primary-deep);gap:10px}
.link-more::after{content:"→";transition:transform .18s ease}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;
  padding:14px 26px;border-radius:var(--r-btn);
  border:1px solid transparent;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .12s ease,box-shadow .18s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 6px 16px rgba(44,107,237,.22)}
.btn-primary:hover{background:var(--c-primary-deep);color:#fff}
.btn-primary:active{transform:translateY(1px);box-shadow:0 3px 10px rgba(44,107,237,.20)}
.btn-outline{background:#fff;color:var(--c-primary);border-color:#C9DCFB}
.btn-outline:hover{background:var(--c-primary-soft);color:var(--c-primary-deep);border-color:var(--c-primary)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.7)}
.btn-ghost:hover{background:rgba(255,255,255,.16);color:#fff}
.btn-sm{padding:10px 18px;font-size:14px;border-radius:9px}
.btn-block{width:100%}
.btn[disabled]{opacity:.5;cursor:not-allowed;transform:none}

/* chip / 标签 */
.chip{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:600;line-height:1;
  padding:6px 14px;border-radius:var(--r-pill);
  background:var(--c-primary-soft);color:var(--c-primary);
  white-space:nowrap;
}
.chip-accent{background:rgba(15,179,154,.12);color:#0A8574}
.chip-hot{background:rgba(255,122,69,.14);color:#D9562A}
.badge-new{
  position:absolute;top:12px;right:12px;
  font-size:12px;font-weight:700;line-height:1;
  padding:5px 10px;border-radius:var(--r-pill);
  background:var(--c-hot);color:#fff;
}

/* 顶部导航 */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.96);
  backdrop-filter:saturate(150%) blur(6px);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .22s ease;
}
.site-header.is-stuck{box-shadow:var(--sh-3)}
.header-inner{display:flex;align-items:center;gap:28px;height:72px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--c-text)}
.brand:hover{color:var(--c-text)}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(140deg,var(--c-primary),#4C86F5);
  color:#fff;font-size:15px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 12px rgba(44,107,237,.28);
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:.2px}
.nav-tabs{display:flex;align-items:center;gap:6px;margin-right:auto}
.nav-tab{
  position:relative;
  font-size:15px;font-weight:500;color:var(--c-text-2);
  padding:9px 16px;border-radius:9px;
  transition:background-color .18s ease,color .18s ease;
}
.nav-tab:hover{background:var(--c-alt);color:var(--c-text)}
.nav-tab.is-active{background:var(--c-primary-soft);color:var(--c-primary);font-weight:600}
.nav-tab.is-active::after{
  content:"";position:absolute;left:16px;right:16px;bottom:2px;height:2px;
  border-radius:2px;background:var(--c-primary);
}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;margin-left:12px}
.icon-btn{
  width:38px;height:38px;border-radius:10px;border:1px solid var(--c-line);
  display:flex;align-items:center;justify-content:center;color:var(--c-text-2);
  background:#fff;transition:border-color .18s ease,color .18s ease,background-color .18s ease;
}
.icon-btn:hover{border-color:var(--c-line-hover);color:var(--c-primary);background:var(--c-primary-soft)}
.menu-toggle{display:none;width:38px;height:38px;border-radius:10px;border:1px solid var(--c-line);background:#fff;align-items:center;justify-content:center;flex-direction:column;gap:4px}
.menu-toggle span{display:block;width:16px;height:2px;border-radius:2px;background:var(--c-text)}
.mobile-drawer{
  display:none;flex-direction:column;gap:6px;
  padding:14px var(--gutter) 20px;border-top:1px solid var(--c-line);background:#fff;
}
.mobile-drawer.is-open{display:flex}
.mobile-drawer a{
  padding:12px 14px;border-radius:10px;font-size:15px;font-weight:500;color:var(--c-text-2);
}
.mobile-drawer a.is-active{background:var(--c-primary-soft);color:var(--c-primary);font-weight:600}

/* Hero */
.hero{position:relative;overflow:hidden;padding:76px 0 0;background:var(--c-bg)}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:url(/assets/images/backpic/back-1.png);
  background-size:cover;background-position:center;
  opacity:.9;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(150deg,rgba(255,255,255,.94) 0%,rgba(246,249,253,.92) 46%,rgba(237,243,254,.96) 100%);
}
.hero .container{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:56px;align-items:center;padding-bottom:64px}
.hero h1{margin-bottom:18px}
.hero h1 em{font-style:normal;color:var(--c-primary)}
.hero-lead{font-size:17px;line-height:1.9;color:var(--c-text-2);max-width:540px;margin-bottom:30px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:28px}
.hero-tags{display:flex;gap:10px;flex-wrap:wrap}
.hero-tags span{
  font-size:13px;font-weight:600;color:var(--c-text-2);
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-pill);
  padding:7px 14px;display:inline-flex;align-items:center;gap:7px;
}
.hero-tags span::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-accent)}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;height:340px;object-fit:cover;border-radius:18px;
  border:1px solid #fff;box-shadow:var(--sh-2);
}
.hero-card{
  position:absolute;left:-22px;bottom:-24px;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-2);padding:16px 18px;max-width:236px;
}
.hero-card h4{font-size:15px;margin-bottom:6px}
.hero-card p{font-size:13px;line-height:1.7;margin:0}
.hero-strip{
  position:relative;z-index:2;
  background:rgba(255,255,255,.86);
  border:1px solid rgba(226,234,243,.9);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  display:grid;grid-template-columns:repeat(3,1fr);
  margin-bottom:-38px;
}
.hero-strip div{padding:20px 26px;border-right:1px solid var(--c-line)}
.hero-strip div:last-child{border-right:none}
.hero-strip strong{display:block;font-size:15px;font-weight:600;color:var(--c-text);margin-bottom:4px}
.hero-strip span{font-size:13px;color:var(--c-text-2);line-height:1.7}

/* 分段标签入口 */
.chip-bar{padding:72px 0 0}
.chip-scroll{display:flex;gap:10px;overflow-x:auto;padding-bottom:6px;scrollbar-width:none}
.chip-scroll::-webkit-scrollbar{display:none}
.chip-link{
  display:inline-flex;align-items:center;gap:8px;flex:0 0 auto;
  font-size:14px;font-weight:600;color:var(--c-text-2);
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-pill);
  padding:10px 20px;transition:all .18s ease;
}
.chip-link:hover{color:var(--c-primary);border-color:var(--c-line-hover);background:var(--c-primary-soft);transform:translateY(-2px)}

/* 服务分步：2+1 不对称 */
.steps-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr;gap:24px}
.step-card{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:30px 26px;box-shadow:var(--sh-1);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  display:flex;flex-direction:column;gap:14px;
}
.step-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--c-line-hover)}
.step-card.feature{
  grid-row:span 1;background:linear-gradient(160deg,#FFFFFF 0%,#F4F8FF 100%);
  padding:34px 30px;
}
.step-num{
  width:40px;height:40px;border-radius:12px;
  background:var(--c-primary-soft);color:var(--c-primary);
  font-family:var(--font-num);font-size:16px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.step-card.feature .step-num{background:var(--c-primary);color:#fff;box-shadow:0 6px 14px rgba(44,107,237,.25)}
.step-card p{font-size:15px;line-height:1.8;margin:0}
.step-list{margin-top:8px;display:flex;flex-direction:column;gap:10px}
.step-list li{display:flex;gap:10px;font-size:14px;color:var(--c-text-2);line-height:1.7}
.step-list li::before{content:"";flex:0 0 auto;width:16px;height:16px;margin-top:5px;border-radius:5px;background:rgba(15,179,154,.16);border:1px solid rgba(15,179,154,.4)}

/* 内容预览拼贴 */
.preview-grid{display:grid;grid-template-columns:1.5fr 1.5fr 1fr;gap:24px}
.preview-card{
  position:relative;background:var(--c-card);border:1px solid var(--c-line);
  border-radius:var(--r-card);overflow:hidden;display:flex;flex-direction:column;
  box-shadow:var(--sh-1);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.preview-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--c-line-hover)}
.preview-card img{width:100%;height:190px;object-fit:cover;border-radius:0}
.preview-card .pv-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.preview-card h3{font-size:18px}
.preview-card p{font-size:14px;line-height:1.8;margin:0}
.preview-card .pv-foot{margin-top:auto;font-size:13px;font-weight:600;color:var(--c-primary)}
.preview-card.narrow{background:linear-gradient(165deg,#EDF3FE 0%,#FFFFFF 70%)}
.preview-card.narrow .pv-body{padding:26px 22px}
.preview-card.narrow ul{display:flex;flex-direction:column;gap:12px;margin-top:4px}
.preview-card.narrow li{font-size:14px;color:var(--c-text-2);display:flex;gap:9px;line-height:1.7}
.preview-card.narrow li::before{content:"";flex:0 0 auto;width:7px;height:7px;border-radius:50%;background:var(--c-accent);margin-top:9px}

/* 流程进度 */
.flow-wrap{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);padding:40px 36px;box-shadow:var(--sh-1)}
.flow-track{position:relative;height:6px;border-radius:3px;background:var(--c-alt);margin:38px 0 0}
.flow-fill{position:absolute;left:0;top:0;height:6px;width:72%;border-radius:3px;background:linear-gradient(90deg,var(--c-primary),var(--c-accent))}
.flow-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.flow-step{position:relative;padding-top:34px}
.flow-step::before{
  content:"";position:absolute;top:-43px;left:0;width:16px;height:16px;border-radius:50%;
  background:#fff;border:3px solid var(--c-line);
}
.flow-step.is-done::before{border-color:var(--c-primary);background:var(--c-primary)}
.flow-step.is-now::before{border-color:var(--c-accent);background:#fff;box-shadow:0 0 0 5px rgba(15,179,154,.16)}
.flow-step h4{font-size:16px;margin-bottom:6px}
.flow-step p{font-size:14px;line-height:1.75;margin:0}
.flow-legend{display:flex;gap:20px;flex-wrap:wrap;margin-top:26px;padding-top:22px;border-top:1px dashed var(--c-line)}
.flow-legend span{font-size:13px;color:var(--c-text-2);display:inline-flex;align-items:center;gap:8px}
.flow-legend i{width:10px;height:10px;border-radius:50%;display:block}
.dot-done{background:var(--c-primary)}
.dot-now{background:#fff;border:3px solid var(--c-accent)}
.dot-todo{background:#fff;border:3px solid var(--c-line)}

/* 最新信息 */
.latest-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:36px;flex-wrap:wrap}
.post-list{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.post-card{
  display:flex;flex-direction:column;background:var(--c-card);
  border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);color:inherit;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--c-line-hover);color:inherit}
.post-thumb{position:relative}
.post-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:0}
.post-thumb .chip{position:absolute;top:12px;left:12px;background:rgba(255,255,255,.94);color:var(--c-primary);box-shadow:var(--sh-1)}
.post-body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-body h3{font-size:17px;line-height:1.55}
.post-body p{font-size:14px;line-height:1.78;margin:0}
.post-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;padding-top:12px;border-top:1px solid var(--c-line);font-size:13px;color:var(--c-text-2)}
.post-meta .more{font-weight:600;color:var(--c-primary)}
.clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.empty-state{
  grid-column:1/-1;background:var(--c-alt);border:1px dashed var(--c-line-hover);
  border-radius:var(--r-card);padding:52px 28px;text-align:center;
}
.empty-art{
  width:76px;height:76px;margin:0 auto 18px;border-radius:20px;
  background:#fff;border:1px solid var(--c-line);color:var(--c-primary);
  font-family:var(--font-num);font-size:20px;font-weight:700;
  display:flex;align-items:center;justify-content:center;box-shadow:var(--sh-1);
}
.empty-state p{font-size:15px;margin-bottom:20px}

/* 服务承诺 */
.promise-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.promise-card{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:26px 22px;box-shadow:var(--sh-1);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.promise-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--c-line-hover)}
.promise-card .p-icon{
  width:42px;height:42px;border-radius:12px;margin-bottom:16px;
  background:rgba(15,179,154,.12);color:#0A8574;
  display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:700;
}
.promise-card h4{font-size:16px;margin-bottom:8px}
.promise-card p{font-size:14px;line-height:1.78;margin:0}
.stat-band{
  margin-top:26px;display:grid;grid-template-columns:repeat(3,1fr);gap:20px;
  background:linear-gradient(120deg,#FFFFFF 0%,#F3F8FF 100%);
  border:1px solid var(--c-line);border-radius:var(--r-card);padding:26px 30px;
}
.stat-band div{border-right:1px solid var(--c-line);padding-right:20px}
.stat-band div:last-child{border-right:none;padding-right:0}
.stat-band strong{display:block;font-size:22px;font-weight:700;color:var(--c-primary);font-family:var(--font-num);letter-spacing:.5px}
.stat-band span{font-size:13px;color:var(--c-text-2);line-height:1.7;display:block;margin-top:4px}

/* FAQ */
.faq-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:48px;align-items:start}
.faq-item{border:1px solid var(--c-line);border-radius:var(--r-card);background:#fff;margin-bottom:14px;overflow:hidden;transition:background-color .2s ease,border-color .2s ease}
.faq-item.is-open{background:var(--c-bg);border-color:var(--c-line-hover)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;text-align:left;
  padding:20px 22px;font-size:16px;font-weight:600;color:var(--c-text);line-height:1.6;
}
.faq-q .q-no{font-family:var(--font-num);font-size:14px;font-weight:700;color:var(--c-primary);flex:0 0 auto;width:26px}
.faq-q .q-text{flex:1}
.faq-q .q-icon{
  flex:0 0 auto;width:22px;height:22px;position:relative;
  transition:transform .22s ease;
}
.faq-q .q-icon::before,.faq-q .q-icon::after{
  content:"";position:absolute;background:var(--c-primary);border-radius:2px;
}
.faq-q .q-icon::before{left:0;top:10px;width:22px;height:2px}
.faq-q .q-icon::after{top:0;left:10px;width:2px;height:22px}
.faq-item.is-open .q-icon{transform:rotate(45deg)}
.faq-a{display:none;padding:0 22px 22px 62px}
.faq-item.is-open .faq-a{display:block}
.faq-a p{font-size:15px;line-height:1.85;margin:0}

/* CTA 横幅 */
.cta-banner{
  position:relative;overflow:hidden;border-radius:20px;
  background:linear-gradient(130deg,#2C6BED 0%,#1B4FBF 100%);
  padding:56px 48px;color:#fff;
}
.cta-banner::before{
  content:"";position:absolute;inset:0;
  background-image:url(/assets/images/backpic/back-3.png);
  background-size:cover;background-position:center;opacity:.16;
}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.4fr 1fr;gap:36px;align-items:center}
.cta-banner h2{color:#fff;margin-bottom:12px}
.cta-banner p{color:rgba(255,255,255,.86);font-size:15px;margin:0;max-width:520px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;justify-content:flex-end}
.cta-banner .btn-primary{background:#fff;color:var(--c-primary-deep);box-shadow:0 8px 20px rgba(8,26,58,.22)}
.cta-banner .btn-primary:hover{background:#EDF3FE;color:var(--c-primary-deep)}

/* 订阅 */
.sub-form{display:flex;gap:0;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-btn);padding:4px;max-width:340px;transition:border-color .18s ease,box-shadow .18s ease}
.sub-form:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(44,107,237,.14)}
.sub-form input{flex:1;border:none;background:transparent;padding:10px 12px;font-size:14px;outline:none;min-width:0}
.sub-form input::placeholder{color:#9AAEBD}
.sub-form button{flex:0 0 auto;padding:10px 18px;border-radius:8px;background:var(--c-primary);color:#fff;font-size:14px;font-weight:600;transition:background-color .18s ease}
.sub-form button:hover{background:var(--c-primary-deep)}
.form-hint{font-size:13px;color:var(--c-text-2);margin-top:10px}
.form-hint.is-error{color:var(--c-danger)}

/* 页脚 */
.site-footer{background:#fff;border-top:1px solid var(--c-line);margin-top:0}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px;padding:64px 0 44px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.85;max-width:300px;margin-bottom:20px}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--c-text)}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{font-size:14px;color:var(--c-text-2)}
.footer-col a:hover{color:var(--c-primary)}
.footer-contact li{font-size:14px;color:var(--c-text-2);line-height:1.8}
.footer-bottom{
  border-top:1px solid var(--c-line);padding:20px 0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom p{font-size:13px;color:var(--c-text-2);margin:0}
.footer-bottom .meta-links{display:flex;gap:18px;font-size:13px;color:var(--c-text-2)}

/* 骨架屏 */
.skeleton{background:linear-gradient(90deg,#EAF1FE 0%,#F6F9FD 50%,#EAF1FE 100%);background-size:200% 100%;animation:sk 1.2s ease-in-out infinite}
@keyframes sk{0%{background-position:200% 0}100%{background-position:-200% 0}}

/* 响应式 */
@media (max-width:1279px){
  :root{--gutter:22px}
  .hero-grid{gap:40px}
}
@media (max-width:1023px){
  :root{--sec-pad:64px}
  .nav-tabs{display:none}
  .menu-toggle{display:flex}
  .header-actions .btn{display:none}
  .hero{padding-top:56px}
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .hero-visual img{height:280px}
  .hero-card{position:static;margin-top:16px;max-width:100%}
  .steps-grid{grid-template-columns:repeat(2,1fr)}
  .step-card.feature{grid-column:1/-1}
  .preview-grid{grid-template-columns:repeat(2,1fr)}
  .preview-card.narrow{grid-column:1/-1}
  .promise-grid{grid-template-columns:repeat(2,1fr)}
  .faq-grid{grid-template-columns:1fr;gap:32px}
  .footer-top{grid-template-columns:repeat(2,1fr);gap:36px}
  .cta-inner{grid-template-columns:1fr;gap:26px}
  .cta-actions{justify-content:flex-start}
}
@media (max-width:767px){
  :root{--sec-pad:48px;--gutter:20px}
  h3{font-size:18px}
  .header-inner{height:64px;gap:14px}
  .brand-text{font-size:16px}
  .hero-strip{grid-template-columns:1fr}
  .hero-strip div{border-right:none;border-bottom:1px solid var(--c-line);padding:16px 20px}
  .hero-strip div:last-child{border-bottom:none}
  .post-list{grid-template-columns:1fr}
  .steps-grid,.preview-grid,.promise-grid{grid-template-columns:1fr}
  .stat-band{grid-template-columns:1fr;gap:16px;padding:22px}
  .stat-band div{border-right:none;border-bottom:1px solid var(--c-line);padding:0 0 14px}
  .stat-band div:last-child{border-bottom:none;padding-bottom:0}
  .flow-wrap{padding:28px 22px}
  .flow-steps{grid-template-columns:1fr;gap:6px}
  .flow-step{padding-top:22px}
  .flow-step::before{top:-30px}
  .flow-track{margin-top:30px}
  .faq-a{padding-left:22px}
  .cta-banner{padding:38px 24px;border-radius:16px}
  .footer-top{grid-template-columns:1fr;padding:48px 0 32px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:479px){
  h1{font-size:26px}
  h2{font-size:21px}
  .hero-lead{font-size:15px}
  .hero-actions .btn{width:100%}
  .btn-block-mobile{width:100%}
  .step-card,.preview-card .pv-body,.promise-card{padding-left:16px;padding-right:16px}
  .sub-form{max-width:100%}
  .post-meta{font-size:12px}
}

/* roulang page: category1 */
:root{
  --brand:#2C6BED;
  --brand-deep:#1B4FBF;
  --brand-soft:#EDF3FE;
  --accent:#0FB39A;
  --hot:#FF7A45;
  --text:#1B2A3D;
  --text-2:#5C7285;
  --line:#E2EAF3;
  --line-soft:#C9DCFB;
  --bg:#F6F9FD;
  --card:#FFFFFF;
  --alt:#F2F7FE;
  --radius-card:14px;
  --radius-img:12px;
  --radius-btn:10px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(16,42,67,.06);
  --shadow-2:0 8px 24px rgba(16,42,67,.10);
  --shadow-3:0 4px 16px rgba(16,42,67,.08);
  --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:system-ui,-apple-system,"Segoe UI","Inter",sans-serif;
  --trans:180ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand);text-decoration:none;transition:color var(--trans),background-color var(--trans),border-color var(--trans)}
a:hover{color:var(--brand-deep)}
button,input{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
h1,h2,h3,h4{margin:0;letter-spacing:0;color:var(--text)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1.4;
  border:1px solid transparent;white-space:nowrap;
  transition:background-color var(--trans),color var(--trans),border-color var(--trans),box-shadow var(--trans),transform var(--trans);
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-1)}
.btn-primary:hover{background:var(--brand-deep);color:#fff;box-shadow:var(--shadow-2)}
.btn-primary:active{transform:translateY(1px);box-shadow:none}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--line-soft)}
.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-deep);border-color:var(--brand)}
.btn-ghost:active{transform:translateY(1px)}
.btn-line{background:transparent;color:#fff;border-color:rgba(255,255,255,.7)}
.btn-line:hover{background:rgba(255,255,255,.16);color:#fff;border-color:#fff}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-block{width:100%}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.96);
  backdrop-filter:saturate(180%) blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--trans);
}
.site-header.is-scrolled{box-shadow:var(--shadow-3)}
.header-inner{display:flex;align-items:center;gap:28px;min-height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-weight:700;font-size:18px}
.brand:hover{color:var(--brand-deep)}
.brand-mark{
  width:34px;height:34px;border-radius:10px;flex:0 0 34px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--brand) 0%,#4C89F5 100%);
  color:#fff;font-size:16px;font-weight:700;
}
.brand-text{letter-spacing:0}
.nav-tabs{display:flex;align-items:center;gap:6px;margin-left:12px}
.nav-tab{
  position:relative;padding:10px 16px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:500;color:var(--text-2);
  transition:background-color var(--trans),color var(--trans);
}
.nav-tab:hover{background:var(--brand-soft);color:var(--brand-deep)}
.nav-tab.is-active{background:var(--brand-soft);color:var(--brand);font-weight:600}
.nav-tab.is-active::after{
  content:"";position:absolute;left:16px;right:16px;bottom:2px;height:2px;
  border-radius:2px;background:var(--brand);
}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.icon-btn{
  width:40px;height:40px;border-radius:var(--radius-pill);
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--text-2);border:1px solid var(--line);background:#fff;
  transition:color var(--trans),border-color var(--trans),background-color var(--trans);
}
.icon-btn:hover{color:var(--brand);border-color:var(--line-soft);background:var(--brand-soft)}
.menu-btn{display:none;width:40px;height:40px;border-radius:var(--radius-btn);align-items:center;justify-content:center;border:1px solid var(--line);background:#fff}
.menu-btn span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);position:relative}
.menu-btn span::before,.menu-btn span::after{content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:var(--text)}
.menu-btn span::before{top:-6px}
.menu-btn span::after{top:6px}
.mobile-drawer{
  display:none;border-top:1px solid var(--line);background:#fff;
  padding:14px 24px 20px;
}
.mobile-drawer.is-open{display:block}
.mobile-drawer .nav-tab{display:block;width:100%;padding:12px 14px;margin-bottom:6px}
.mobile-drawer .nav-tab.is-active::after{display:none}

/* ---------- 面包屑 ---------- */
.breadcrumb-bar{padding:18px 0 0;background:var(--bg)}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--text-2)}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:#A9BACB}
.breadcrumb .now{color:var(--text);font-weight:600}

/* ---------- Hero ---------- */
.page-hero{position:relative;padding:40px 0 72px;overflow:hidden}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  opacity:.5;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(255,255,255,.94) 0%,rgba(246,249,253,.92) 62%,#F6F9FD 100%);
}
.page-hero .container{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:40px;align-items:center}
.hero-chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:var(--radius-pill);
  background:#fff;border:1px solid var(--line-soft);
  color:var(--brand);font-size:13px;font-weight:600;
  box-shadow:var(--shadow-1);
}
.hero-chip .dot{width:6px;height:6px;border-radius:50%;background:var(--accent)}
.page-hero h1{
  font-size:clamp(28px,4.2vw,44px);line-height:1.25;font-weight:700;
  margin:18px 0 16px;
}
.hero-lead{font-size:17px;color:var(--text-2);line-height:1.85;max-width:640px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.tag-pill{
  padding:6px 14px;border-radius:var(--radius-pill);
  background:var(--brand-soft);color:var(--brand-deep);
  font-size:13px;font-weight:500;
}
.hero-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-2);padding:22px;
}
.hero-card h3{font-size:17px;margin-bottom:14px}
.hero-card ul li{
  display:flex;gap:12px;padding:12px 0;border-bottom:1px dashed var(--line);
  font-size:15px;color:var(--text-2);
}
.hero-card ul li:last-child{border-bottom:0;padding-bottom:0}
.hero-card ul li b{color:var(--text);font-weight:600}
.hero-card .ok{
  width:22px;height:22px;flex:0 0 22px;border-radius:50%;
  background:rgba(15,179,154,.12);color:var(--accent);
  display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;
}
.stat-strip{
  position:relative;z-index:2;margin-top:36px;
  display:grid;grid-template-columns:repeat(3,1fr);
  background:rgba(255,255,255,.9);border:1px solid var(--line);
  border-radius:var(--radius-card);box-shadow:var(--shadow-1);overflow:hidden;
}
.stat-strip .stat{padding:20px 24px;border-right:1px solid var(--line)}
.stat-strip .stat:last-child{border-right:0}
.stat .k{font-family:var(--font-num);font-size:24px;font-weight:700;color:var(--brand)}
.stat .v{font-size:14px;color:var(--text-2);margin-top:2px}

/* ---------- 锚点 chips ---------- */
.anchor-bar{padding:0 0 8px}
.anchor-chips{display:flex;flex-wrap:wrap;gap:10px}
.anchor-chip{
  padding:9px 18px;border-radius:var(--radius-pill);
  background:#fff;border:1px solid var(--line);
  font-size:14px;font-weight:500;color:var(--text-2);
  transition:all var(--trans);
}
.anchor-chip:hover{color:var(--brand);border-color:var(--line-soft);background:var(--brand-soft);box-shadow:var(--shadow-1)}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0}
.section.alt{background:var(--alt)}
.section-head{max-width:760px;margin-bottom:44px}
.section-head .eyebrow{
  display:inline-block;padding:5px 12px;border-radius:var(--radius-pill);
  background:var(--brand-soft);color:var(--brand);font-size:13px;font-weight:600;margin-bottom:14px;
}
.section-head h2{font-size:clamp(22px,2.6vw,32px);line-height:1.35;font-weight:700}
.section-head p{margin-top:14px;color:var(--text-2);font-size:16px}

/* ---------- 图文交替卡组 ---------- */
.media-row{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:48px;align-items:center;
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:32px;box-shadow:var(--shadow-1);
  transition:border-color var(--trans),box-shadow var(--trans),transform var(--trans);
}
.media-row + .media-row{margin-top:28px}
.media-row:hover{border-color:var(--line-soft);box-shadow:var(--shadow-2);transform:translateY(-4px)}
.media-row.reverse .media-text{order:2}
.media-row.reverse .media-figure{order:1}
.media-text h3{font-size:20px;line-height:1.5;font-weight:600}
.media-text .badge-line{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.badge{
  padding:4px 12px;border-radius:var(--radius-pill);
  font-size:13px;font-weight:600;line-height:1.6;
  background:var(--brand-soft);color:var(--brand-deep);
}
.badge.accent{background:rgba(15,179,154,.12);color:#0B8E7C}
.badge.hot{background:rgba(255,122,69,.14);color:#D9541F}
.media-text p{margin-top:14px;color:var(--text-2);font-size:15.5px}
.point-list{margin-top:18px;display:grid;gap:10px}
.point-list li{
  position:relative;padding-left:22px;font-size:15px;color:var(--text-2);
}
.point-list li::before{
  content:"";position:absolute;left:4px;top:12px;
  width:7px;height:7px;border-radius:50%;background:var(--accent);
}
.media-text .inline-link{
  display:inline-flex;align-items:center;gap:6px;margin-top:20px;
  font-size:15px;font-weight:600;color:var(--brand);
}
.media-text .inline-link:hover{gap:10px;color:var(--brand-deep)}
.media-figure{
  position:relative;border-radius:var(--radius-img);overflow:hidden;
  background:var(--brand-soft);aspect-ratio:16/10;
}
.media-figure img{width:100%;height:100%;object-fit:cover}
.media-figure .fig-tag{
  position:absolute;top:12px;left:12px;
  padding:5px 12px;border-radius:var(--radius-pill);
  background:rgba(255,255,255,.94);color:var(--brand-deep);
  font-size:13px;font-weight:600;box-shadow:var(--shadow-1);
}

/* ---------- 节奏时间线 ---------- */
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:8px}
.tl-item{position:relative;padding:0 18px}
.tl-item::before{
  content:"";position:absolute;left:0;right:0;top:11px;height:3px;background:var(--line);
}
.tl-item.done::before{background:linear-gradient(90deg,var(--brand) 0%,var(--accent) 100%)}
.tl-dot{
  position:relative;z-index:2;width:24px;height:24px;border-radius:50%;
  background:#fff;border:3px solid var(--line);margin-bottom:16px;
}
.tl-item.done .tl-dot{border-color:var(--brand);background:var(--brand)}
.tl-item.done .tl-dot::after{
  content:"";position:absolute;inset:5px;border-radius:50%;background:#fff;
}
.tl-item h4{font-size:17px;font-weight:600}
.tl-item p{margin-top:8px;font-size:14.5px;color:var(--text-2)}

/* ---------- 条目列表 ---------- */
.entry-list{display:grid;gap:18px}
.entry{
  display:grid;grid-template-columns:180px minmax(0,1fr) auto;gap:24px;align-items:center;
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:18px;box-shadow:var(--shadow-1);
  transition:border-color var(--trans),box-shadow var(--trans),transform var(--trans);
}
.entry:hover{border-color:var(--line-soft);box-shadow:var(--shadow-2);transform:translateY(-4px)}
.entry-thumb{
  border-radius:var(--radius-img);overflow:hidden;aspect-ratio:16/10;background:var(--brand-soft);
}
.entry-thumb img{width:100%;height:100%;object-fit:cover}
.entry-body h3{font-size:18px;line-height:1.5;font-weight:600}
.entry-body h3 a{color:var(--text)}
.entry-body h3 a:hover{color:var(--brand)}
.entry-body p{margin-top:8px;font-size:15px;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.entry-meta{display:flex;align-items:center;gap:12px;margin-top:10px;font-size:13.5px;color:var(--text-2)}
.entry-meta .sep{color:#C4D2E0}
.entry-side{display:flex;flex-direction:column;align-items:flex-end;gap:10px}
.entry-side .go{font-size:14px;font-weight:600;color:var(--brand)}
.entry-side .go:hover{color:var(--brand-deep)}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:880px}
.faq-item{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  margin-bottom:14px;overflow:hidden;transition:border-color var(--trans),box-shadow var(--trans);
}
.faq-item.is-open{border-color:var(--line-soft);box-shadow:var(--shadow-1);background:var(--bg)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:16px;
  padding:20px 22px;text-align:left;font-size:17px;font-weight:600;color:var(--text);
}
.faq-q .no{font-family:var(--font-num);font-size:14px;font-weight:700;color:var(--brand);flex:0 0 32px}
.faq-q .txt{flex:1}
.faq-icon{
  position:relative;width:22px;height:22px;flex:0 0 22px;
  transition:transform var(--trans);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;top:10px;left:2px;width:18px;height:2px;border-radius:2px;background:var(--brand);
}
.faq-icon::after{transform:rotate(90deg)}
.faq-item.is-open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 260ms ease}
.faq-a p{padding:0 22px 22px 70px;color:var(--text-2);font-size:15.5px;line-height:1.85}

/* ---------- CTA ---------- */
.cta-band{
  background:linear-gradient(135deg,#1B4FBF 0%,#2C6BED 58%,#3D7CF0 100%);
  border-radius:18px;padding:48px;color:#fff;
  display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);
  gap:40px;align-items:center;box-shadow:var(--shadow-2);
}
.cta-band h2{color:#fff;font-size:clamp(22px,2.6vw,30px);line-height:1.35}
.cta-band p{margin-top:14px;color:rgba(255,255,255,.86);font-size:16px}
.cta-band .cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.cta-panel{
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.28);
  border-radius:var(--radius-card);padding:24px;
}
.cta-panel h3{color:#fff;font-size:17px;font-weight:600}
.cta-panel ul{margin-top:14px;display:grid;gap:10px}
.cta-panel li{font-size:14.5px;color:rgba(255,255,255,.88);display:flex;gap:10px;align-items:flex-start}
.cta-panel li .ok{color:#8FE9DA;font-weight:700}

/* ---------- 表单 ---------- */
.field{display:flex;gap:8px;margin-top:14px}
.field input[type="email"],.field input[type="text"]{
  flex:1;min-width:0;padding:12px 14px;border-radius:var(--radius-btn);
  border:1px solid rgba(255,255,255,.4);background:rgba(255,255,255,.96);
  font-size:15px;color:var(--text);
  transition:border-color var(--trans),box-shadow var(--trans);
}
.field input::placeholder{color:#93A6B8}
.field input:focus{outline:none;border-color:#fff;box-shadow:0 0 0 2px rgba(15,179,154,.6)}
.field.is-error input{border-color:#E5484D;box-shadow:0 0 0 2px rgba(229,72,77,.25)}
.field-msg{margin-top:8px;font-size:13px;color:rgba(255,255,255,.86)}
.field-msg.error{color:#FFD2D4}

/* ---------- 页脚 ---------- */
.site-footer{background:#0F2038;color:#C6D4E4;margin-top:0;padding:64px 0 0}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;gap:32px}
.footer-brand .brand{color:#fff;font-size:18px}
.footer-brand .brand:hover{color:#fff}
.footer-brand p{margin-top:16px;font-size:14.5px;color:#9EB3C9;line-height:1.8}
.footer-brand .sub-form{display:flex;gap:8px;margin-top:20px}
.footer-brand .sub-form input{
  flex:1;min-width:0;padding:11px 14px;border-radius:var(--radius-btn);
  border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.08);
  color:#fff;font-size:14.5px;
  transition:border-color var(--trans),box-shadow var(--trans);
}
.footer-brand .sub-form input::placeholder{color:#8CA3BC}
.footer-brand .sub-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 2px rgba(44,107,237,.45)}
.footer-brand .sub-form button{
  padding:11px 20px;border-radius:var(--radius-btn);
  background:var(--brand);color:#fff;font-size:14.5px;font-weight:600;
  transition:background-color var(--trans),transform var(--trans);
}
.footer-brand .sub-form button:hover{background:var(--brand-deep)}
.footer-brand .sub-form button:active{transform:translateY(1px)}
.form-hint{margin-top:10px;font-size:13px;color:#8CA3BC}
.form-hint.is-ok{color:#6FE3D2}
.form-hint.is-error{color:#FFB3B7}
.footer-col h4{color:#fff;font-size:16px;font-weight:600;margin-bottom:18px}
.footer-col ul{display:grid;gap:12px}
.footer-col a{color:#9EB3C9;font-size:14.5px}
.footer-col a:hover{color:#fff}
.footer-contact li{font-size:14.5px;color:#9EB3C9;line-height:1.8}
.footer-bottom{
  margin-top:48px;border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0 26px;display:flex;flex-wrap:wrap;gap:14px;
  align-items:center;justify-content:space-between;
  font-size:13.5px;color:#8CA3BC;
}
.footer-bottom .meta-links{display:flex;flex-wrap:wrap;gap:18px}
.footer-bottom .meta-links a{color:#9EB3C9}
.footer-bottom .meta-links a:hover{color:#fff}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{padding:0 22px}
  .header-inner{gap:18px}
}
@media (max-width:1023px){
  .section{padding:64px 0}
  .nav-tabs{display:none}
  .menu-btn{display:inline-flex}
  .hero-grid{grid-template-columns:1fr;gap:28px}
  .page-hero{padding:32px 0 56px}
  .media-row{grid-template-columns:1fr;gap:24px;padding:24px}
  .media-row.reverse .media-text{order:1}
  .media-row.reverse .media-figure{order:2}
  .timeline{grid-template-columns:repeat(2,1fr);gap:28px 0}
  .tl-item::before{top:11px}
  .tl-item:nth-child(2n)::before{background:var(--line)}
  .cta-band{grid-template-columns:1fr;padding:36px}
  .footer-top{grid-template-columns:1fr 1fr;gap:32px}
  .entry{grid-template-columns:140px minmax(0,1fr);gap:18px}
  .entry-side{grid-column:2;flex-direction:row;align-items:center;justify-content:space-between}
}
@media (max-width:767px){
  body{font-size:15.5px}
  .container{padding:0 20px}
  .section{padding:48px 0}
  .section-head{margin-bottom:28px}
  .header-inner{min-height:64px}
  .site-header .btn-primary{display:none}
  .stat-strip{grid-template-columns:1fr}
  .stat-strip .stat{border-right:0;border-bottom:1px solid var(--line)}
  .stat-strip .stat:last-child{border-bottom:0}
  .timeline{grid-template-columns:1fr;gap:24px 0}
  .tl-item::before{display:none}
  .entry{grid-template-columns:1fr}
  .entry-thumb{aspect-ratio:16/9}
  .entry-side{grid-column:1}
  .faq-a p{padding:0 20px 20px 20px}
  .faq-q{padding:16px 18px;font-size:16px}
  .cta-band{padding:28px 22px;border-radius:14px}
  .footer-top{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  h1{font-size:26px}
  .page-hero h1{font-size:26px;line-height:1.3}
  .hero-actions .btn{width:100%}
  .hero-card{padding:18px}
  .media-row{padding:18px}
  .btn{padding:11px 18px}
  .section{padding:44px 0}
}

/* roulang page: article */
:root{
  --primary:#2C6BED;
  --primary-dark:#1B4FBF;
  --primary-light:#EDF3FE;
  --accent:#0FB39A;
  --hot:#FF7A45;
  --text:#1B2A3D;
  --text-2:#5C7285;
  --line:#E2EAF3;
  --line-strong:#C9DCFB;
  --page:#F6F9FD;
  --card:#FFFFFF;
  --alt:#F2F7FE;
  --danger:#E5484D;
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,42,67,.06);
  --sh-2:0 8px 24px rgba(16,42,67,.10);
  --sh-3:0 4px 16px rgba(16,42,67,.08);
  --container:1200px;
  --t:180ms ease;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--page);
  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:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;border:0;}
a{color:inherit;text-decoration:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,h5,p,figure,blockquote{margin:0;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input,textarea,select{font:inherit;color:inherit;}
table{border-collapse:collapse;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}
::selection{background:var(--primary-light);color:var(--primary-dark);}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}

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

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:90;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--t);
}
.site-header.is-stuck{box-shadow:var(--sh-3);}
.header-inner{
  display:flex;align-items:center;gap:40px;height:72px;
  position:relative;
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(135deg,#3D7BF5,#1B4FBF);
  color:#fff;display:grid;place-items:center;
  font-size:16px;font-weight:700;letter-spacing:0;
}
.brand-text{font-size:19px;font-weight:700;color:var(--text);letter-spacing:0;}
.brand:hover .brand-text{color:var(--primary);}
.nav-tabs{display:flex;align-items:center;gap:6px;flex:1 1 auto;justify-content:center;}
.nav-tab{
  position:relative;display:inline-flex;align-items:center;
  height:36px;padding:0 16px;border-radius:var(--r-pill);
  font-size:15px;color:var(--text-2);
  transition:background var(--t),color var(--t);
}
.nav-tab:hover{background:var(--alt);color:var(--text);}
.nav-tab.is-active{background:var(--primary-light);color:var(--primary);font-weight:600;}
.nav-tab.is-active::after{
  content:"";position:absolute;left:50%;transform:translateX(-50%);
  bottom:-13px;width:22px;height:2px;border-radius:2px;background:var(--primary);
}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.icon-btn{
  width:38px;height:38px;border-radius:10px;display:grid;place-items:center;
  color:var(--text-2);border:1px solid transparent;
  transition:background var(--t),color var(--t),border-color var(--t);
}
.icon-btn:hover{background:var(--alt);color:var(--primary);border-color:var(--line);}
.menu-btn{
  display:none;width:38px;height:38px;border-radius:10px;
  place-items:center;color:var(--text);border:1px solid var(--line);
  transition:background var(--t);
}
.menu-btn:hover{background:var(--alt);}
.read-progress{
  position:absolute;left:0;bottom:-1px;height:2px;width:0;
  background:linear-gradient(90deg,var(--primary),var(--accent));
  transition:width .12s linear;
}
.mobile-drawer{display:none;}

/* ============ 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;white-space:nowrap;
  border:1px solid transparent;cursor:pointer;
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);
}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 16px rgba(44,107,237,.22);}
.btn-primary:hover{background:var(--primary-dark);box-shadow:0 8px 20px rgba(27,79,191,.26);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 3px 10px rgba(27,79,191,.22);}
.btn-primary:disabled{background:#B9CDF6;box-shadow:none;cursor:not-allowed;}
.btn-ghost{background:#fff;border-color:var(--primary);color:var(--primary);}
.btn-ghost:hover{background:var(--primary-light);}
.btn-ghost:active{transform:translateY(1px);}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--primary);font-size:14px;font-weight:600;
}
.btn-text:hover{color:var(--primary-dark);}

/* ============ 标签 / 徽章 ============ */
.chip{
  display:inline-flex;align-items:center;gap:6px;
  height:28px;padding:0 14px;border-radius:var(--r-pill);
  font-size:13px;line-height:1;background:var(--alt);color:var(--text-2);
}
.chip-primary{background:var(--primary-light);color:var(--primary);font-weight:600;}
.chip-accent{background:rgba(15,179,154,.12);color:#0A8A76;font-weight:600;}
.chip-hot{background:rgba(255,122,69,.12);color:#D4522A;font-weight:600;}

/* ============ 面包屑 ============ */
.crumbs{background:#fff;border-bottom:1px solid var(--line);}
.crumbs-inner{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  padding-top:14px;padding-bottom:14px;
  font-size:14px;color:var(--text-2);
}
.crumbs-inner a{transition:color var(--t);}
.crumbs-inner a:hover{color:var(--primary);}
.crumbs-inner .sep{color:#B7C7D9;}
.crumbs-inner .current{color:var(--text);}

/* ============ 文章头部 ============ */
.post-head{background:#fff;border-bottom:1px solid var(--line);padding:46px 0 32px;}
.post-title{
  font-size:clamp(28px,4.2vw,44px);
  line-height:1.25;font-weight:700;letter-spacing:0;
  margin-top:16px;max-width:900px;
}
.post-meta{
  display:flex;align-items:center;flex-wrap:wrap;gap:12px;
  margin-top:20px;font-size:14px;color:var(--text-2);
}
.post-meta .meta-item em{font-style:normal;color:var(--text);font-weight:600;}
.post-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--line-strong);}

/* ============ 文章布局 ============ */
.post-layout{
  display:grid;
  grid-template-columns:minmax(0,760px) 260px;
  gap:56px;justify-content:center;align-items:start;
  padding-top:52px;padding-bottom:88px;
}
.post-main{min-width:0;}

/* ============ 正文排版 ============ */
.article-body{font-size:16px;line-height:1.9;color:var(--text);}
.article-body > * + *{margin-top:20px;}
.article-body p{margin-top:18px;}
.article-body h2{
  font-size:clamp(22px,2.6vw,26px);line-height:1.4;font-weight:700;
  margin-top:44px;padding-left:14px;border-left:4px solid var(--primary);
  letter-spacing:0;
}
.article-body h3{font-size:20px;line-height:1.5;font-weight:600;margin-top:34px;}
.article-body h4{font-size:17px;line-height:1.6;font-weight:600;margin-top:24px;}
.article-body a{color:var(--primary);border-bottom:1px solid rgba(44,107,237,.35);}
.article-body a:hover{border-bottom-color:var(--primary);color:var(--primary-dark);}
.article-body strong{font-weight:600;}
.article-body ul,.article-body ol{margin-top:18px;padding-left:8px;}
.article-body ul li{position:relative;padding-left:20px;margin-top:10px;}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.75em;
  width:6px;height:6px;border-radius:50%;background:var(--accent);
}
.article-body ol{list-style:decimal;padding-left:24px;}
.article-body ol li{margin-top:10px;padding-left:4px;}
.article-body blockquote{
  margin-top:26px;padding:18px 22px;
  background:var(--alt);border-left:4px solid var(--primary);
  border-radius:0 var(--r-card) var(--r-card) 0;
  color:var(--text-2);
}
.article-body blockquote p{margin-top:8px;}
.article-body blockquote p:first-child{margin-top:0;}
.article-body img{margin-top:24px;border-radius:var(--r-img);box-shadow:var(--sh-1);}
.article-body figure{margin-top:26px;}
.article-body figure img{margin-top:0;}
.article-body figcaption{font-size:13px;color:var(--text-2);text-align:center;margin-top:10px;}
.article-body table{
  width:100%;margin-top:26px;font-size:15px;
  border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;background:#fff;
}
.article-body th,.article-body td{padding:12px 16px;border-bottom:1px solid var(--line);text-align:left;}
.article-body th{background:var(--alt);font-weight:600;}
.article-body tr:last-child td{border-bottom:0;}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:14px;background:var(--alt);color:var(--primary-dark);
  padding:2px 6px;border-radius:6px;
}
.article-body pre{
  margin-top:26px;padding:18px 20px;background:#1B2A3D;color:#E6EEF9;
  border-radius:var(--r-card);overflow-x:auto;
  font-size:14px;line-height:1.7;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
.article-body pre code{background:none;color:inherit;padding:0;font-size:14px;}
.article-body hr{margin-top:34px;border:0;border-top:1px solid var(--line);}
.article-body h2:first-child,.article-body h3:first-child{margin-top:0;}

/* ============ 侧栏目录 ============ */
.post-aside{
  position:sticky;top:96px;
  display:flex;flex-direction:column;gap:20px;
}
.toc-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:18px 16px;box-shadow:var(--sh-1);
}
.toc-card h3{font-size:15px;font-weight:600;margin-bottom:10px;}
.toc-card ul li a{
  display:block;padding:8px 10px;border-radius:8px;
  font-size:14px;line-height:1.6;color:var(--text-2);
  border-left:2px solid transparent;
  transition:background var(--t),color var(--t),border-color var(--t);
}
.toc-card ul li a:hover{background:var(--alt);color:var(--primary);}
.toc-card ul li a.is-current{
  background:var(--primary-light);color:var(--primary);
  font-weight:600;border-left-color:var(--primary);
}
.toc-card ul li a.lv3{padding-left:22px;font-size:13px;}
.aside-note{
  background:var(--alt);border:1px solid var(--line);
  border-radius:var(--r-card);padding:18px 16px;
}
.aside-note h4{font-size:14px;font-weight:600;margin-bottom:8px;}
.aside-note p{font-size:13px;line-height:1.75;color:var(--text-2);}
.aside-note .btn{margin-top:14px;width:100%;}

/* ============ 标签行 / 返回栏 ============ */
.post-tags{
  display:flex;align-items:center;flex-wrap:wrap;gap:10px;
  margin-top:48px;padding-top:24px;border-top:1px dashed var(--line);
}
.tag-label{font-size:14px;color:var(--text-2);margin-right:2px;}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;
  border-radius:var(--r-pill);border:1px solid var(--line);
  background:#fff;font-size:13px;color:var(--text-2);
  transition:border-color var(--t),color var(--t),background var(--t);
}
.tag:hover{border-color:var(--line-strong);color:var(--primary);background:var(--primary-light);}
.post-foot{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  flex-wrap:wrap;
  margin-top:26px;padding:18px 22px;
  background:var(--alt);border-radius:var(--r-card);
}
.post-foot p{font-size:14px;color:var(--text-2);}

/* ============ 空态 ============ */
.empty-state{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:56px 32px;text-align:center;box-shadow:var(--sh-1);
}
.empty-illu{
  width:72px;height:72px;margin:0 auto 18px;border-radius:20px;
  background:var(--primary-light);color:var(--primary);
  display:grid;place-items:center;font-size:26px;font-weight:700;
}
.empty-state h2{font-size:22px;font-weight:700;}
.empty-state p{margin-top:10px;color:var(--text-2);font-size:15px;}
.empty-state .btn{margin-top:24px;}

/* ============ 板块通用 ============ */
.section{padding:88px 0;}
.section-alt{background:var(--alt);}
.section-head{margin-bottom:36px;}
.section-head h2{font-size:clamp(22px,2.6vw,32px);line-height:1.35;font-weight:700;letter-spacing:0;}
.section-head p{margin-top:10px;color:var(--text-2);font-size:15px;max-width:640px;}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;}

/* ============ 继续浏览卡片 ============ */
.more-grid{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;
}
.more-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.more-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--line-strong);}
.more-thumb{aspect-ratio:16/10;overflow:hidden;background:var(--primary-light);}
.more-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.more-card:hover .more-thumb img{transform:scale(1.04);}
.more-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:8px;flex:1 1 auto;}
.more-body h3{font-size:17px;font-weight:600;line-height:1.5;}
.more-body p{font-size:14px;color:var(--text-2);line-height:1.75;}
.more-link{margin-top:auto;font-size:14px;font-weight:600;color:var(--primary);}

/* ============ 底部转化 ============ */
.cta-band{padding:0 0 88px;}
.cta-box{
  display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;
  background:linear-gradient(135deg,#2C6BED 0%,#1B4FBF 100%);
  border-radius:20px;padding:52px 48px;color:#fff;
  box-shadow:0 18px 40px rgba(27,79,191,.24);
}
.cta-box h2{font-size:clamp(22px,2.6vw,30px);line-height:1.35;font-weight:700;color:#fff;}
.cta-box p{margin-top:12px;font-size:15px;line-height:1.85;color:rgba(255,255,255,.86);max-width:520px;}
.cta-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.cta-points li{
  display:inline-flex;align-items:center;gap:6px;height:30px;padding:0 14px;
  border-radius:var(--r-pill);background:rgba(255,255,255,.16);
  font-size:13px;color:#fff;
}
.cta-points li::before{
  content:"";width:6px;height:6px;border-radius:50%;background:#6FE3CE;
}
.cta-form{display:flex;flex-direction:column;gap:12px;}
.cta-form input{
  height:48px;padding:0 16px;border-radius:var(--r-btn);
  border:1px solid rgba(255,255,255,.35);
  background:rgba(255,255,255,.96);color:var(--text);font-size:15px;
  transition:border-color var(--t),box-shadow var(--t);
}
.cta-form input::placeholder{color:#93A6BA;}
.cta-form input:focus{outline:none;border-color:#6FE3CE;box-shadow:0 0 0 3px rgba(111,227,206,.35);}
.cta-form .btn-primary{background:#fff;color:var(--primary-dark);box-shadow:none;height:48px;}
.cta-form .btn-primary:hover{background:#EDF3FE;}
.form-hint{font-size:13px;color:rgba(255,255,255,.72);}
.form-hint.is-error{color:#FFD3CC;}

/* ============ 页脚 ============ */
.site-footer{background:#12233A;color:#C6D4E4;padding:64px 0 0;font-size:14px;}
.footer-top{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;
  gap:32px;padding-bottom:44px;
}
.footer-brand .brand{margin-bottom:14px;}
.footer-brand .brand-text{color:#fff;}
.footer-brand p{font-size:14px;line-height:1.85;color:#9CB2C9;max-width:340px;}
.sub-form{display:flex;gap:10px;margin-top:20px;max-width:360px;}
.sub-form input{
  flex:1 1 auto;min-width:0;height:44px;padding:0 14px;
  border-radius:var(--r-btn);border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.06);color:#fff;font-size:14px;
  transition:border-color var(--t),box-shadow var(--t);
}
.sub-form input::placeholder{color:#7E94AC;}
.sub-form input:focus{outline:none;border-color:#6FE3CE;box-shadow:0 0 0 3px rgba(111,227,206,.18);}
.sub-form button{
  height:44px;padding:0 20px;border-radius:var(--r-btn);
  background:var(--primary);color:#fff;font-size:14px;font-weight:600;
  transition:background var(--t);
}
.sub-form button:hover{background:var(--primary-dark);}
.site-footer .form-hint{margin-top:10px;color:#7E94AC;font-size:13px;}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col ul a{color:#9CB2C9;transition:color var(--t);}
.footer-col ul a:hover{color:#fff;}
.footer-contact li{color:#9CB2C9;line-height:1.7;}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0;border-top:1px solid rgba(255,255,255,.1);
  font-size:13px;color:#7E94AC;
}
.meta-links{display:flex;align-items:center;gap:20px;flex-wrap:wrap;}
.meta-links a{color:#9CB2C9;transition:color var(--t);}
.meta-links a:hover{color:#fff;}

/* ============ 加载骨架 ============ */
.skeleton{
  background:linear-gradient(90deg,#EAF1FE 0%,#F6F9FD 50%,#EAF1FE 100%);
  background-size:200% 100%;
  animation:sk 1.2s ease-in-out infinite;
}
@keyframes sk{
  0%{background-position:200% 0;}
  100%{background-position:-200% 0;}
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .container{padding:0 22px;}
  .post-layout{grid-template-columns:minmax(0,1fr) 240px;gap:40px;}
}
@media (max-width:1024px){
  .post-layout{grid-template-columns:minmax(0,1fr);gap:36px;padding-top:40px;padding-bottom:64px;}
  .post-aside{position:static;}
  .more-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-box{grid-template-columns:1fr;gap:32px;padding:44px 36px;}
  .footer-top{grid-template-columns:1fr 1fr;gap:32px 28px;}
  .section{padding:64px 0;}
}
@media (max-width:860px){
  .header-inner{gap:16px;height:64px;}
  .nav-tabs{display:none;}
  .menu-btn{display:grid;}
  .brand-text{font-size:17px;}
  .icon-btn{display:none;}
  .mobile-drawer{
    display:block;max-height:0;overflow:hidden;
    background:#fff;border-top:1px solid transparent;
    transition:max-height .3s ease,border-color .3s ease;
  }
  .mobile-drawer.is-open{max-height:340px;border-top-color:var(--line);}
  .mobile-drawer a{
    display:block;padding:14px 24px;font-size:15px;color:var(--text-2);
    border-bottom:1px solid var(--line);
    transition:background var(--t),color var(--t);
  }
  .mobile-drawer a:hover{background:var(--alt);color:var(--primary);}
  .mobile-drawer .drawer-cta{margin:14px 24px 18px;border:0;}
  .post-head{padding:32px 0 24px;}
  .post-title{margin-top:12px;}
}
@media (max-width:767px){
  .section{padding:48px 0;}
  .more-grid{grid-template-columns:minmax(0,1fr);}
  .cta-band{padding:0 0 48px;}
  .cta-box{padding:32px 24px;border-radius:16px;}
  .footer-top{grid-template-columns:1fr;gap:30px;padding-bottom:32px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:12px;}
  .post-layout{padding-top:32px;padding-bottom:48px;}
  .post-foot{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .container{padding:0 20px;}
  .brand-text{font-size:16px;}
  .post-title{font-size:24px;line-height:1.32;}
  .post-meta{font-size:13px;gap:9px;}
  .article-body{font-size:15.5px;line-height:1.88;}
  .btn{width:100%;}
  .btn-sm{width:auto;}
  .cta-form .btn{width:100%;}
  .sub-form{flex-direction:column;}
  .sub-form button{width:100%;}
  .more-body{padding:16px;}
  .post-tags{margin-top:36px;}
}

/* roulang page: category2 */
:root{
  --brand:#2C6BED;
  --brand-deep:#1B4FBF;
  --brand-soft:#EDF3FE;
  --accent:#0FB39A;
  --hot:#FF7A45;
  --text:#1B2A3D;
  --text-2:#5C7285;
  --line:#E2EAF3;
  --bg:#F6F9FD;
  --surface:#FFFFFF;
  --alt:#F2F7FE;
  --radius:14px;
  --radius-img:12px;
  --radius-btn:10px;
  --shadow-1:0 1px 2px rgba(16,42,67,.06);
  --shadow-2:0 8px 24px rgba(16,42,67,.10);
  --shadow-3:0 4px 16px rgba(16,42,67,.08);
  --ease:180ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:96px}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
}
img{max-width:100%;display:block;border-style:none}
a{color:var(--brand);text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--brand-deep)}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:0}
p{margin:0 0 14px}
ul,ol{margin:0;padding:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:8px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--brand);color:#fff;padding:10px 16px;border-radius:0 0 10px 0;z-index:200}
.skip-link:focus{left:0;color:#fff}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:#FFFFFF;
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease);
}
.site-header.is-stuck{box-shadow:var(--shadow-3)}
.header-inner{display:flex;align-items:center;gap:26px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-weight:700;font-size:18px;flex:0 0 auto}
.brand:hover{color:var(--text)}
.brand-mark{
  width:34px;height:34px;border-radius:9px;
  background:linear-gradient(135deg,#2C6BED,#1B4FBF);
  color:#fff;display:grid;place-items:center;font-size:15px;font-weight:700;
}
.brand-text{line-height:1}
.nav-tabs{display:flex;align-items:center;gap:4px}
.nav-tab{
  position:relative;display:inline-block;
  padding:9px 16px;border-radius:10px;
  font-size:15px;color:var(--text-2);
  transition:background var(--ease),color var(--ease);
}
.nav-tab:hover{background:var(--brand-soft);color:var(--brand-deep)}
.nav-tab.is-active{background:var(--brand-soft);color:var(--brand);font-weight:600}
.nav-tab.is-active::after{
  content:"";position:absolute;left:16px;right:16px;bottom:4px;height:2px;
  background:var(--brand);border-radius:2px;
}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.icon-btn{
  width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:#FFFFFF;
  display:grid;place-items:center;color:var(--text-2);cursor:pointer;transition:all var(--ease);
}
.icon-btn:hover{border-color:#C9DCFB;color:var(--brand);background:var(--brand-soft)}
.burger{display:none}
.burger span{display:block;width:18px;height:2px;background:var(--text-2);border-radius:2px;margin:3px auto;transition:transform var(--ease)}
.search-row{display:none;border-top:1px solid var(--line);background:#fff}
.search-row.is-open{display:block}
.search-inner{display:flex;gap:10px;padding:12px 0}
.search-inner input{
  flex:1;padding:11px 14px;border:1px solid var(--line);border-radius:10px;background:#fff;
  font-size:15px;transition:border-color var(--ease),box-shadow var(--ease);
}
.search-inner input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 2px rgba(44,107,237,.15)}
.mobile-drawer{display:none;background:#fff;border-top:1px solid var(--line)}
.mobile-drawer .drawer-inner{padding:14px 0 20px;display:grid;gap:6px}
.mobile-drawer a{padding:11px 14px;border-radius:10px;font-size:15px;color:var(--text-2)}
.mobile-drawer a.is-active{background:var(--brand-soft);color:var(--brand);font-weight:600}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1.4;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background var(--ease),color var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-1)}
.btn-primary:hover{background:var(--brand-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--shadow-1)}
.btn-ghost{background:#fff;border-color:var(--brand);color:var(--brand)}
.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-deep)}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-block{width:100%}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none}

/* ---------- page head ---------- */
.page-head{
  position:relative;
  padding:58px 0 46px;
  background-color:#fff;
  background-image:linear-gradient(rgba(255,255,255,.93),rgba(246,249,253,.97)),url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--text-2);margin-bottom:16px}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:#B8C7D6}
.page-head h1{font-size:clamp(26px,3.6vw,40px);line-height:1.25;margin:0 0 16px;max-width:900px}
.page-lead{font-size:17px;color:var(--text-2);max-width:840px;margin:0 0 22px}
.head-chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:999px;
  background:var(--brand-soft);border:1px solid #D8E5FD;
  color:var(--brand-deep);font-size:13px;line-height:1.6;
}
.chip-accent{background:#E6F7F3;border-color:#C7EDE5;color:#0A8F7B}
.badge-hot{
  display:inline-flex;align-items:center;gap:5px;
  padding:3px 10px;border-radius:999px;
  background:#FFF1EA;border:1px solid #FFD8C6;color:#D9541F;font-size:12px;font-weight:600;
}

/* ---------- layout ---------- */
.layout-wrap{padding:56px 0 76px}
.layout{display:grid;grid-template-columns:252px minmax(0,1fr);gap:48px;align-items:start}

.toc-card{
  position:sticky;top:96px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow-1);
}
.toc-title{font-size:13px;letter-spacing:.08em;color:var(--text-2);margin:0 0 12px}
.toc-list{list-style:none;display:grid;gap:2px;margin:0 0 18px}
.toc-list a{
  display:block;padding:9px 12px;border-radius:9px;
  font-size:14px;color:var(--text-2);
  transition:background var(--ease),color var(--ease);
}
.toc-list a:hover{background:var(--brand-soft);color:var(--brand-deep)}
.toc-list a.is-active{background:var(--brand-soft);color:var(--brand);font-weight:600}
.toc-cta{border-top:1px dashed var(--line);padding-top:16px}
.toc-cta p{font-size:13px;color:var(--text-2);margin:0 0 12px}

/* ---------- doc sections ---------- */
.doc-section{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:32px;box-shadow:var(--shadow-1);margin-bottom:26px;
}
.doc-section h2{font-size:clamp(21px,2.4vw,28px);line-height:1.35;margin:0 0 12px}
.doc-section h3{font-size:19px;line-height:1.5;margin:0 0 8px}
.doc-section p{color:var(--text);margin:0 0 14px}
.doc-section p.muted{color:var(--text-2);font-size:14.5px}
.section-kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--accent);letter-spacing:.06em;margin:0 0 10px;
}
.section-head{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:10px}
.section-head h2{margin:0}

.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:22px}
.mini-card{
  background:var(--alt);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease),background var(--ease);
}
.mini-card:hover{background:#fff;border-color:#C9DCFB;transform:translateY(-4px);box-shadow:var(--shadow-2)}
.card-no{display:inline-block;font-size:13px;font-weight:700;color:var(--brand);margin-bottom:10px}
.mini-card h3{font-size:17px}
.mini-card p{font-size:14.5px;color:var(--text-2);line-height:1.8;margin:0}

.media-block{display:grid;grid-template-columns:1.05fr .95fr;gap:26px;align-items:center;margin:26px 0 0}
.media-block img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--radius-img);border:1px solid var(--line);background:var(--alt);
}
.media-caption{font-size:13px;color:var(--text-2);margin-top:10px}
.media-text h3{margin-bottom:10px}
.media-text p{font-size:14.5px;color:var(--text-2);margin-bottom:10px}

.stage-list{display:grid;gap:16px;margin-top:22px}
.stage-card{
  display:grid;grid-template-columns:56px minmax(0,1fr);gap:18px;
  padding:20px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.stage-card:hover{border-color:#C9DCFB;transform:translateY(-2px);box-shadow:var(--shadow-2)}
.stage-no{
  width:56px;height:56px;border-radius:14px;background:var(--brand-soft);color:var(--brand);
  display:grid;place-items:center;font-weight:700;font-size:17px;
}
.stage-card h3{margin:2px 0 6px}
.stage-card p{margin:0;font-size:14.5px;color:var(--text-2)}

.split{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:22px}
.panel{background:var(--alt);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.panel h3{font-size:17px;margin-bottom:6px}
.panel p{font-size:14px;color:var(--text-2);margin:0}

.check-list{list-style:none;display:grid;gap:10px;margin-top:14px}
.check-list li{position:relative;padding-left:30px;font-size:15px;line-height:1.8;color:var(--text)}
.check-list li::before{
  content:"✓";position:absolute;left:0;top:4px;
  width:18px;height:18px;border-radius:6px;background:#E6F7F3;color:#0A8F7B;
  font-size:12px;line-height:18px;text-align:center;font-weight:700;
}

.spec-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-top:22px}
.spec{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-img);
  padding:20px;transition:border-color var(--ease),box-shadow var(--ease);
}
.spec:hover{border-color:#C9DCFB;box-shadow:var(--shadow-2)}
.spec h4{font-size:16px;line-height:1.6;margin:0 0 8px}
.spec p{font-size:14.5px;color:var(--text-2);margin:0}

.note{
  margin-top:22px;padding:16px 18px;border-left:3px solid var(--accent);
  background:#F3FBF9;border-radius:0 var(--radius-img) var(--radius-img) 0;
  font-size:14.5px;color:#205F55;
}
.note strong{color:#0A8F7B}

/* ---------- faq ---------- */
.faq-list{display:grid;gap:12px;margin-top:20px}
.faq-item{
  border:1px solid var(--line);border-radius:var(--radius-img);background:#fff;
  transition:background var(--ease),border-color var(--ease);
}
.faq-item[open]{background:var(--bg);border-color:#C9DCFB}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:flex-start;gap:14px;
  padding:18px 20px;font-size:16px;font-weight:600;line-height:1.6;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-num{color:var(--brand);font-size:14px;font-weight:700;min-width:22px;line-height:1.8}
.faq-plus{
  position:relative;margin-left:auto;flex:0 0 auto;width:22px;height:22px;margin-top:2px;
  transition:transform var(--ease);
}
.faq-plus::before,.faq-plus::after{content:"";position:absolute;background:var(--brand);border-radius:2px}
.faq-plus::before{left:50%;top:3px;bottom:3px;width:2px;transform:translateX(-50%)}
.faq-plus::after{top:50%;left:3px;right:3px;height:2px;transform:translateY(-50%)}
.faq-item[open] .faq-plus{transform:rotate(45deg)}
.faq-answer{padding:0 20px 20px 56px;font-size:14.5px;color:var(--text-2);line-height:1.85}
.faq-answer p{margin:0}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--brand-soft);
  border-top:1px solid #D8E5FD;
  padding:72px 0;
}
.cta-inner{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
.cta-copy h2{font-size:clamp(22px,2.6vw,30px);line-height:1.35;margin:0 0 14px}
.cta-copy p{color:var(--text-2);font-size:15.5px;margin:0 0 20px}
.cta-points{list-style:none;display:grid;gap:10px}
.cta-points li{position:relative;padding-left:26px;font-size:15px;color:var(--text)}
.cta-points li::before{
  content:"";position:absolute;left:0;top:11px;width:10px;height:10px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 0 4px rgba(15,179,154,.14);
}
.form-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;box-shadow:var(--shadow-2);
}
.form-card h3{font-size:19px;margin:0 0 18px}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:8px}
.input,.select,.textarea{
  width:100%;padding:11px 14px;border:1px solid var(--line);border-radius:var(--radius-btn);
  background:#fff;font-size:15px;line-height:1.6;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.textarea{min-height:104px;resize:vertical}
.input:focus,.select:focus,.textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 2px rgba(44,107,237,.15)}
.form-hint{font-size:13px;color:var(--text-2);margin:12px 0 0}
.form-status{font-size:14px;margin:12px 0 0;color:#0A8F7B;min-height:22px}
.form-status.is-error{color:#E5484D}

/* ---------- footer ---------- */
.site-footer{background:var(--alt);border-top:1px solid var(--line);padding:56px 0 0}
.footer-top{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.3fr;gap:32px;padding-bottom:40px}
.footer-brand .brand{margin-bottom:14px}
.footer-brand p{font-size:14px;color:var(--text-2);line-height:1.8;margin:0}
.sub-form{
  display:flex;align-items:center;gap:8px;margin-top:14px;max-width:380px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-btn);padding:5px;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.sub-form:focus-within{border-color:var(--brand);box-shadow:0 0 0 2px rgba(44,107,237,.15)}
.sub-form input{flex:1;min-width:0;border:none;background:transparent;padding:8px 10px;font-size:14px;outline:none}
.sub-form button{
  border:none;background:var(--brand);color:#fff;border-radius:8px;
  padding:8px 16px;font-size:14px;font-weight:600;cursor:pointer;transition:background var(--ease);
}
.sub-form button:hover{background:var(--brand-deep)}
.footer-col h4{font-size:15px;margin:0 0 14px}
.footer-col ul{list-style:none;display:grid;gap:10px}
.footer-col a{font-size:14px;color:var(--text-2)}
.footer-col a:hover{color:var(--brand)}
.footer-contact li{font-size:14px;color:var(--text-2);line-height:1.75}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  font-size:13px;color:var(--text-2);
}
.footer-bottom p{margin:0;font-size:13px}
.meta-links{display:flex;flex-wrap:wrap;gap:18px}
.meta-links a{font-size:13px;color:var(--text-2)}
.meta-links a:hover{color:var(--brand)}

/* ---------- responsive ---------- */
@media (max-width:1120px){
  .layout{grid-template-columns:224px minmax(0,1fr);gap:36px}
  .footer-top{grid-template-columns:1.6fr 1fr 1fr;gap:28px}
}
@media (max-width:1024px){
  .layout{grid-template-columns:1fr;gap:28px}
  .toc-card{position:static}
  .toc-list{grid-template-columns:repeat(2,minmax(0,1fr));display:grid}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-inner{grid-template-columns:1fr;gap:30px}
  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:860px){
  .nav-tabs{display:none}
  .burger{display:grid;place-items:center}
  .mobile-drawer.is-open{display:block}
  .header-inner{height:64px;gap:16px}
  .layout-wrap{padding:40px 0 60px}
  .doc-section{padding:24px}
  .media-block{grid-template-columns:1fr;gap:18px}
  .split{grid-template-columns:1fr}
  .spec-grid{grid-template-columns:1fr}
  .cta-band{padding:52px 0}
}
@media (max-width:600px){
  .container{padding:0 20px}
  .page-head{padding:40px 0 32px}
  .page-lead{font-size:16px}
  .card-grid{grid-template-columns:1fr}
  .toc-list{grid-template-columns:1fr}
  .stage-card{grid-template-columns:44px minmax(0,1fr);gap:14px;padding:18px}
  .stage-no{width:44px;height:44px;border-radius:12px;font-size:15px}
  .footer-top{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:480px){
  body{font-size:15.5px}
  .doc-section{padding:20px 16px}
  .faq-item summary{padding:16px 14px;font-size:15px}
  .faq-answer{padding:0 14px 18px 46px}
  .form-card{padding:20px 16px}
  .btn-block-mobile{width:100%}
  .header-actions .btn-sm{padding:8px 12px;font-size:13px}
}