/* roulang page: index */
:root{
  --ink-900:#0B1026;
  --ink-700:#1E2A5A;
  --ink-500:#3A477F;
  --ink-100:#E7EAF6;
  --accent-500:#FF5A1F;
  --accent-600:#DE4510;
  --accent-050:#FFF1EA;
  --mint-400:#46D5C8;
  --bg:#F6F7FB;
  --card:#FFFFFF;
  --line:#E6E9F2;
  --text:#0F1533;
  --muted:#5C6480;
  --radius-card:14px;
  --radius-btn:12px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(11,16,38,.04);
  --shadow-2:0 16px 40px -20px rgba(11,16,38,.18);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0;padding:0}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent-500);outline-offset:2px;border-radius:4px}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
@media(min-width:768px){.container{padding:0 32px}}

.section{padding:56px 0}
@media(min-width:768px){.section{padding:88px 0}}
@media(min-width:1024px){.section{padding:104px 0}}

.eyebrow{
  display:inline-block;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--accent-600);
  background:var(--accent-050);
  border-radius:var(--radius-pill);
  padding:3px 12px;
  margin-bottom:14px;
  font-weight:600;
}
.h2{
  font-size:clamp(24px,2.6vw,34px);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.35;
  position:relative;
  padding-left:16px;
}
.h2::before{
  content:"";
  position:absolute;
  left:0;top:.24em;
  width:4px;height:.86em;
  background:var(--accent-500);
  border-radius:2px;
}
.h3{font-size:20px;font-weight:700;letter-spacing:-.01em;line-height:1.5}
.lead{font-size:16px;color:var(--muted);line-height:1.85}
.muted{color:var(--muted)}

.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:32px;
  flex-wrap:wrap;
}
.section-head p.sub{margin-top:10px;color:var(--muted);font-size:15px;max-width:640px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:700;
  letter-spacing:.01em;
  border:1px solid transparent;
  transition:background-color .2s ease-out,color .2s ease-out,border-color .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out;
  white-space:nowrap;
}
.btn .arw{transition:transform .2s ease-out}
.btn:hover .arw{transform:translateX(4px)}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--accent-500);color:#fff;box-shadow:var(--shadow-1)}
.btn-primary:hover{background:var(--accent-600);box-shadow:var(--shadow-2)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.45)}
.btn-ghost:hover{background:#fff;color:var(--ink-900);border-color:#fff}
.btn-outline{background:#fff;color:var(--ink-900);border-color:var(--line)}
.btn-outline:hover{border-color:var(--accent-500);color:var(--accent-600)}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:10px}
.btn-block{width:100%}

.text-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:700;
  color:var(--ink-700);
  border-bottom:1px solid var(--line);
  padding-bottom:2px;
  transition:color .2s ease-out,border-color .2s ease-out;
}
.text-link:hover{color:var(--accent-600);border-color:var(--accent-500)}
.text-link span{transition:transform .2s ease-out}
.text-link:hover span{transform:translateX(4px)}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:#fff;
  border-bottom:1px solid var(--line);
  box-shadow:var(--shadow-1);
}
.nav-row{
  display:flex;
  align-items:center;
  gap:20px;
  height:56px;
}
@media(min-width:1024px){.nav-row{height:64px;gap:28px}}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{display:flex;align-items:center;justify-content:center;width:30px;height:30px;flex-shrink:0}
.brand-text{
  font-size:16px;
  font-weight:800;
  letter-spacing:-.02em;
  color:var(--ink-900);
  line-height:1.2;
}
@media(min-width:1024px){.brand-text{font-size:17px}}
.nav-main{display:none}
@media(min-width:1024px){
  .nav-main{display:flex;align-items:center;gap:4px;margin:0 auto}
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:36px;
  padding:0 14px;
  border-radius:var(--radius-pill);
  font-size:14.5px;
  font-weight:600;
  color:var(--ink-700);
  transition:background-color .2s ease-out,color .2s ease-out;
}
.nav-link:hover{background:var(--ink-100);color:var(--ink-900)}
.nav-link.is-active{color:var(--accent-600);background:var(--accent-050)}
.nav-link.is-active::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:2px;
  height:2px;border-radius:2px;
  background:var(--accent-500);
}
.nav-tools{display:flex;align-items:center;gap:12px;margin-left:auto}
.nav-search{
  display:none;
  align-items:center;
  gap:8px;
  height:40px;
  padding:0 14px;
  background:#F2F4F9;
  border:1px solid transparent;
  border-radius:var(--radius-pill);
  transition:background-color .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
}
@media(min-width:768px){.nav-search{display:flex;width:220px}}
@media(min-width:1280px){.nav-search{width:260px}}
.nav-search:focus-within{background:#fff;border-color:var(--accent-500);box-shadow:0 0 0 4px rgba(255,90,31,.10)}
.nav-search svg{flex-shrink:0}
.nav-search input{
  border:0;background:transparent;outline:none;
  font-size:14px;width:100%;color:var(--text);
}
.nav-search input::placeholder{color:#98A0B8}
.nav-cta{display:none}
@media(min-width:768px){.nav-cta{display:inline-flex}}
.nav-burger{
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:40px;height:40px;
  border:1px solid var(--line);
  border-radius:10px;
  align-items:center;
}
@media(min-width:1024px){.nav-burger{display:none}}
.nav-burger span{display:block;width:16px;height:2px;background:var(--ink-900);border-radius:2px;transition:transform .2s ease-out,opacity .2s ease-out}
.nav-burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.drawer{
  display:none;
  background:#fff;
  border-top:1px solid var(--line);
  padding:12px 20px 20px;
}
.drawer.is-open{display:block}
@media(min-width:1024px){.drawer.is-open{display:none}}
.drawer a{
  display:block;
  padding:13px 4px;
  font-size:15.5px;
  font-weight:600;
  color:var(--ink-700);
  border-bottom:1px solid var(--line);
}
.drawer a.is-active{color:var(--accent-600)}
.drawer .btn{margin-top:16px}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  background:var(--ink-900);
  color:#fff;
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(255,255,255,.65) 1px, transparent 1px);
  background-size:26px 26px;
  opacity:.08;
  animation:starBreathe 6s ease-in-out infinite;
  pointer-events:none;
  z-index:1;
}
@keyframes starBreathe{0%,100%{opacity:.08}50%{opacity:.14}}
.hero-media{
  position:absolute;
  top:0;right:0;
  width:100%;height:100%;
  overflow:hidden;
  z-index:0;
}
@media(min-width:1024px){.hero-media{width:56%}}
.hero-media img{width:100%;height:100%;object-fit:cover;opacity:.42}
@media(min-width:1024px){.hero-media img{opacity:.72}}
.hero-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(11,16,38,.96) 0%,rgba(11,16,38,.86) 42%,rgba(11,16,38,.34) 100%);
}
.hero-inner{
  position:relative;
  z-index:2;
  padding:64px 0 72px;
}
@media(min-width:768px){.hero-inner{padding:88px 0 96px}}
@media(min-width:1024px){.hero-inner{padding:112px 0 120px}}
.hero-wrap{max-width:640px}
.hero-brand{
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:6px 14px 6px 10px;
  border:1px solid rgba(255,255,255,.22);
  border-radius:var(--radius-pill);
  font-size:13px;
  font-weight:600;
  letter-spacing:.02em;
  color:#E7EAF6;
  background:rgba(255,255,255,.06);
  margin-bottom:22px;
}
.hero-brand i{display:block;width:7px;height:7px;border-radius:50%;background:var(--accent-500)}
.hero h1{
  font-size:clamp(34px,5vw,58px);
  font-weight:800;
  line-height:1.2;
  letter-spacing:-.02em;
  color:#fff;
}
.hero h1 em{font-style:normal;color:var(--mint-400)}
.hero-sub{
  margin-top:22px;
  font-size:16px;
  line-height:1.85;
  color:#C9CFE6;
  max-width:560px;
}
@media(min-width:768px){.hero-sub{font-size:17.5px}}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
@media(max-width:520px){.hero-actions .btn{width:100%}}
.hero-stats{
  display:flex;
  gap:0;
  margin-top:48px;
  padding-top:26px;
  border-top:1px solid rgba(255,255,255,.14);
  flex-wrap:wrap;
}
.hero-stat{
  flex:1 1 0;
  min-width:120px;
  padding-left:20px;
  border-left:1px solid rgba(255,255,255,.14);
}
.hero-stat:first-child{padding-left:0;border-left:0}
.hero-stat strong{
  display:block;
  font-family:'Inter',ui-sans-serif,system-ui,sans-serif;
  font-size:clamp(24px,3vw,32px);
  font-weight:800;
  letter-spacing:-.02em;
  color:var(--mint-400);
  line-height:1.2;
}
.hero-stat span{display:block;margin-top:6px;font-size:13px;color:#A8B0CC;line-height:1.5}
@media(max-width:640px){
  .hero-stats{gap:16px 0}
  .hero-stat{flex:1 1 46%;min-width:0;padding-left:0;border-left:0}
}

/* ---------- 卖点：1 大 + 2 小 ---------- */
.merit-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:1024px){.merit-grid{grid-template-columns:5fr 7fr;gap:24px;align-items:stretch}}
.merit-main{
  position:relative;
  background:var(--ink-900);
  color:#fff;
  border-radius:var(--radius-card);
  padding:36px 30px 34px;
  overflow:hidden;
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  min-height:280px;
}
.merit-main::after{
  content:"";
  position:absolute;
  right:-40px;bottom:-60px;
  width:220px;height:220px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(70,213,200,.30) 0%,rgba(70,213,200,0) 68%);
}
.merit-no{
  font-family:'Inter',ui-sans-serif,system-ui,sans-serif;
  font-size:64px;
  font-weight:800;
  line-height:1;
  letter-spacing:-.04em;
  color:transparent;
  -webkit-text-stroke:1.5px rgba(255,255,255,.34);
}
.merit-main h3{margin-top:22px;font-size:clamp(21px,2.2vw,26px);font-weight:800;letter-spacing:-.02em;line-height:1.45;color:#fff}
.merit-main p{margin-top:14px;font-size:15px;line-height:1.85;color:#B7BFDA;max-width:420px;position:relative;z-index:1}
.merit-side{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:768px){.merit-side{grid-template-columns:1fr 1fr}}
@media(min-width:1024px){.merit-side{grid-template-columns:1fr;gap:24px}}
.merit-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:26px 26px 24px;
  transition:border-color .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out;
}
.merit-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--ink-100)}
.merit-card .top-line{padding-top:18px;border-top:1px solid var(--line)}
.merit-card .no{
  font-family:'Inter',ui-sans-serif,system-ui,sans-serif;
  font-size:15px;
  font-weight:800;
  letter-spacing:.06em;
  color:var(--accent-500);
}
.merit-card h3{margin-top:10px;font-size:19px;font-weight:700;letter-spacing:-.01em;line-height:1.5}
.merit-card p{margin-top:10px;font-size:14.5px;line-height:1.85;color:var(--muted)}

/* ---------- 场景演示 ---------- */
.scene{
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
  align-items:center;
  padding:36px 0;
}
.scene + .scene{border-top:1px solid var(--line)}
@media(min-width:1024px){
  .scene{grid-template-columns:6fr 6fr;gap:56px;padding:48px 0}
  .scene.reverse .scene-media{order:2}
}
.scene-media{position:relative;border-radius:var(--radius-card);overflow:hidden;background:var(--ink-900)}
.scene-media img{width:100%;height:100%;min-height:220px;object-fit:cover;aspect-ratio:16/10}
@media(min-width:1024px){.scene-media img{aspect-ratio:4/3}}
.scene-media .tag{
  position:absolute;left:14px;top:14px;
  background:rgba(11,16,38,.82);
  color:#fff;
  font-size:12px;
  letter-spacing:.04em;
  padding:5px 12px;
  border-radius:var(--radius-pill);
}
.steps{margin-top:24px}
.step{position:relative;padding:0 0 24px 30px;border-left:1px solid var(--line)}
.step:last-child{padding-bottom:0;border-left-color:transparent}
.step::before{
  content:"";
  position:absolute;
  left:-5.5px;top:9px;
  width:10px;height:10px;
  border-radius:50%;
  background:var(--accent-500);
  box-shadow:0 0 0 4px var(--accent-050);
}
.step h4{font-size:16px;font-weight:700;letter-spacing:-.01em}
.step p{margin-top:6px;font-size:14.5px;line-height:1.8;color:var(--muted)}

/* ---------- 内容列表 ---------- */
.post-grid{display:grid;grid-template-columns:1fr;gap:22px}
@media(min-width:768px){.post-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.post-grid{grid-template-columns:repeat(3,1fr);gap:24px}}
.post-card{
  display:flex;
  flex-direction:column;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--ink-100)}
.post-thumb{overflow:hidden;background:var(--ink-100)}
.post-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .22s ease-out}
.post-card:hover .post-thumb img{transform:scale(1.03)}
.post-body{padding:20px 20px 22px;display:flex;flex-direction:column;flex:1}
.badge{
  display:inline-block;
  align-self:flex-start;
  font-size:12px;
  font-weight:700;
  letter-spacing:.04em;
  color:var(--accent-600);
  background:var(--accent-050);
  border-radius:var(--radius-pill);
  padding:3px 11px;
}
.post-title{
  margin-top:12px;
  font-size:17px;
  font-weight:700;
  line-height:1.55;
  letter-spacing:-.01em;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  transition:color .2s ease-out;
}
.post-card:hover .post-title{color:var(--accent-600)}
.post-sum{
  margin-top:10px;
  font-size:14px;
  line-height:1.8;
  color:var(--muted);
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.post-meta{
  margin-top:auto;
  padding-top:16px;
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--muted);
}
.post-meta .dot{width:3px;height:3px;border-radius:50%;background:#C3C9DD}

.empty-state{
  border:1px dashed var(--line);
  border-radius:var(--radius-card);
  background:#FBFCFE;
  padding:52px 24px;
  text-align:center;
}
.empty-state .star{
  width:38px;height:38px;
  margin:0 auto 16px;
  display:flex;align-items:center;justify-content:center;
  border-radius:50%;
  background:var(--accent-050);
}
.empty-state p{color:var(--muted);font-size:15px}
.empty-state .text-link{margin-top:18px}

/* ---------- 社会认同 ---------- */
.trust{
  background:var(--ink-900);
  color:#fff;
  position:relative;
  overflow:hidden;
}
.trust::before{
  content:"";
  position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.6) 1px, transparent 1px);
  background-size:30px 30px;
  opacity:.08;
  animation:starBreathe 6s ease-in-out infinite;
  pointer-events:none;
}
.trust .container{position:relative;z-index:1}
.trust .h2{color:#fff}
.trust .eyebrow{background:rgba(255,255,255,.08);color:#FFD8C7}
.trust-nums{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:26px 12px;
  margin-top:36px;
  padding-bottom:40px;
  border-bottom:1px solid rgba(255,255,255,.14);
}
@media(min-width:768px){.trust-nums{grid-template-columns:repeat(4,1fr);gap:24px}}
.trust-num strong{
  display:block;
  font-family:'Inter',ui-sans-serif,system-ui,sans-serif;
  font-size:clamp(26px,3.4vw,38px);
  font-weight:800;
  letter-spacing:-.03em;
  line-height:1.15;
  color:var(--mint-400);
}
.trust-num span{display:block;margin-top:8px;font-size:13.5px;color:#A8B0CC;line-height:1.6}
.logo-wall{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:1px;
  margin-top:40px;
  background:rgba(255,255,255,.10);
  border:1px solid rgba(255,255,255,.10);
  border-radius:var(--radius-card);
  overflow:hidden;
}
@media(min-width:768px){.logo-wall{grid-template-columns:repeat(4,1fr)}}
.logo-cell{
  background:rgba(255,255,255,.03);
  padding:22px 12px;
  text-align:center;
  font-size:14px;
  font-weight:600;
  letter-spacing:.04em;
  color:#8E97B6;
  transition:color .2s ease-out,background-color .2s ease-out;
}
.logo-cell:hover{color:#fff;background:rgba(255,255,255,.06)}
.quote-grid{display:grid;grid-template-columns:1fr;gap:20px;margin-top:44px}
@media(min-width:900px){.quote-grid{grid-template-columns:1fr 1fr;gap:24px}}
.quote-card{
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.12);
  border-radius:var(--radius-card);
  padding:26px;
}
.quote-card p{font-size:15.5px;line-height:1.9;color:#D6DAEA}
.quote-who{display:flex;align-items:center;gap:12px;margin-top:20px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12)}
.avatar{
  width:40px;height:40px;flex-shrink:0;
  border-radius:50%;
  background:linear-gradient(135deg,#3A477F,#1E2A5A);
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700;color:#fff;
}
.quote-who strong{display:block;font-size:14.5px;font-weight:700;color:#fff}
.quote-who span{display:block;font-size:13px;color:#98A1BE}

/* ---------- FAQ ---------- */
.faq-list{max-width:860px;margin-top:12px;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:22px 4px;
  text-align:left;
  font-size:16.5px;
  font-weight:700;
  letter-spacing:-.01em;
  color:var(--text);
  transition:color .2s ease-out;
}
@media(max-width:640px){.faq-q{font-size:15px;padding:18px 2px}}
.faq-q:hover{color:var(--accent-600)}
.faq-icon{
  position:relative;
  width:20px;height:20px;flex-shrink:0;
  border-radius:50%;
  border:1px solid var(--line);
  transition:border-color .2s ease-out,background-color .2s ease-out;
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  left:50%;top:50%;
  background:var(--ink-700);
  transform:translate(-50%,-50%);
  transition:transform .2s ease-out,background-color .2s ease-out,opacity .2s ease-out;
}
.faq-icon::before{width:9px;height:1.6px}
.faq-icon::after{width:1.6px;height:9px}
.faq-item.is-open .faq-icon{background:var(--accent-500);border-color:var(--accent-500)}
.faq-item.is-open .faq-icon::before{background:#fff}
.faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) scaleY(0);opacity:0}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .22s ease-out;
}
.faq-a-inner{
  padding:0 4px 24px 18px;
  border-left:1px solid var(--accent-500);
  font-size:15.5px;
  line-height:1.9;
  color:var(--muted);
  opacity:0;
  transition:opacity .22s ease-out;
}
.faq-item.is-open .faq-a-inner{opacity:1}
@media(max-width:640px){.faq-a-inner{font-size:14.5px;padding-left:14px}}

/* ---------- 底部 CTA ---------- */
.cta-band{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:40px 28px;
  display:grid;
  grid-template-columns:1fr;
  gap:26px;
  align-items:center;
  box-shadow:var(--shadow-1);
}
@media(min-width:900px){.cta-band{grid-template-columns:1.4fr 1fr;padding:52px 48px;gap:40px}}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);font-weight:800;letter-spacing:-.02em;line-height:1.4}
.cta-band p{margin-top:14px;color:var(--muted);font-size:15.5px;line-height:1.85;max-width:600px}
.cta-actions{display:flex;flex-direction:column;gap:12px}
@media(min-width:900px){.cta-actions{align-items:stretch}}
.cta-note{font-size:13px;color:var(--muted);text-align:center}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  background:var(--ink-900);
  color:#C9CFE6;
  margin-top:8px;
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.6) 1px, transparent 1px);
  background-size:32px 32px;
  opacity:.07;
  pointer-events:none;
}
.site-footer .container{position:relative;z-index:1}
.footer-top{
  display:grid;
  grid-template-columns:1fr;
  gap:34px;
  padding:52px 0 40px;
  border-top:1px solid rgba(255,255,255,.10);
}
@media(min-width:768px){.footer-top{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px;padding:64px 0 48px}}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff}
.footer-brand .brand-text{color:#fff}
.footer-desc{margin-top:16px;font-size:14px;line-height:1.85;color:#98A1BE;max-width:300px}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;letter-spacing:.02em;margin-bottom:16px}
.footer-col a,.footer-col li{display:block;font-size:14px;line-height:1.7;color:#C9CFE6;padding:5px 0;transition:color .2s ease-out}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.footer-contact li{font-size:14px;line-height:1.8;color:#98A1BE;padding:5px 0}
.footer-contact li strong{color:#E7EAF6;font-weight:600}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.10);
  padding:22px 0 calc(22px + env(safe-area-inset-bottom));
  display:flex;
  flex-direction:column;
  gap:10px;
  font-size:13px;
  color:#8E97B6;
}
@media(min-width:768px){.footer-bottom{flex-direction:row;align-items:center;justify-content:space-between}}

/* ---------- 移动端固定转化条 ---------- */
.mobile-bar{
  display:flex;
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:60;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  background:#fff;
  border-top:1px solid var(--line);
  box-shadow:0 -8px 24px -16px rgba(11,16,38,.28);
}
.mobile-bar .mb-text{font-size:13.5px;font-weight:600;color:var(--ink-700);line-height:1.4}
.mobile-bar .mb-text span{display:block;font-size:12px;color:var(--muted);font-weight:400}
@media(min-width:769px){.mobile-bar{display:none}}
@media(max-width:768px){body{padding-bottom:72px}}

/* ---------- 桌面端浮层 CTA ---------- */
.float-cta{
  display:none;
  position:fixed;
  right:24px;bottom:24px;
  z-index:55;
  align-items:center;
  gap:14px;
  padding:14px 16px 14px 20px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-2);
  max-width:340px;
}
@media(min-width:1024px){
  .float-cta.is-visible{display:flex;animation:riseIn .22s ease-out}
}
@keyframes riseIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.float-cta p{font-size:14px;font-weight:700;line-height:1.5;color:var(--ink-900)}
.float-cta small{display:block;font-size:12.5px;color:var(--muted);font-weight:400;margin-top:2px}
.float-close{
  width:26px;height:26px;flex-shrink:0;
  border-radius:50%;
  border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  color:var(--muted);
  font-size:14px;line-height:1;
  transition:background-color .2s ease-out,color .2s ease-out,border-color .2s ease-out;
}
.float-close:hover{background:var(--ink-900);color:#fff;border-color:var(--ink-900)}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s ease-out,transform .4s ease-out}
.reveal.is-in{opacity:1;transform:translateY(0)}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .hero::before,.trust::before{animation:none}
  html{scroll-behavior:auto}
  *{transition-duration:.01ms !important}
}

/* roulang page: article */
:root{
  --ink-900:#0B1026;
  --ink-700:#1E2A5A;
  --ink-500:#3A477F;
  --ink-100:#E7EAF6;
  --accent-500:#FF5A1F;
  --accent-600:#DE4510;
  --accent-050:#FFF1EA;
  --mint-400:#46D5C8;
  --bg:#F6F7FB;
  --card:#FFFFFF;
  --line:#E6E9F2;
  --text:#0F1533;
  --muted:#5C6480;
  --r-card:14px;
  --r-btn:12px;
  --r-pill:999px;
  --shadow-1:0 1px 2px rgba(11,16,38,.04);
  --shadow-2:0 16px 40px -20px rgba(11,16,38,.18);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
ul,ol{margin:0;padding:0}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.32}
p{margin:0}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.container{padding:0 32px}}

/* ---------- 按钮 / 标签 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  border-radius:var(--r-btn);font-weight:600;font-size:15px;
  padding:11px 20px;border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-primary{background:var(--accent-500);color:#fff;box-shadow:var(--shadow-1)}
.btn-primary:hover{background:var(--accent-600);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:#fff;color:var(--ink-700);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--accent-500);color:var(--accent-600)}
.btn-sm{padding:8px 14px;font-size:14px}
.btn .arrow{transition:transform .2s var(--ease)}
.btn:hover .arrow{transform:translateX(4px)}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--accent-500);outline-offset:2px}
.badge{
  display:inline-block;background:var(--accent-050);color:var(--accent-600);
  border-radius:var(--r-pill);padding:3px 11px;font-size:12px;font-weight:600;letter-spacing:.04em;
}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid var(--line);box-shadow:var(--shadow-1);
}
.header-inner{display:flex;align-items:center;gap:24px;height:64px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{display:inline-flex;width:32px;height:32px;border-radius:10px;background:var(--ink-900);align-items:center;justify-content:center}
.brand-text{font-weight:800;font-size:17px;letter-spacing:-.02em;color:var(--ink-900)}
.nav-main{display:flex;align-items:center;gap:4px;margin-left:6px}
.nav-link{
  position:relative;padding:8px 13px;border-radius:var(--r-pill);
  font-size:15px;color:var(--ink-700);transition:background-color .2s var(--ease),color .2s var(--ease);
}
.nav-link:hover{background:var(--accent-050);color:var(--accent-600)}
.nav-link.is-active{background:var(--accent-050);color:var(--accent-600);font-weight:700}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.search-box{
  display:flex;align-items:center;gap:8px;height:40px;padding:0 14px;
  background:#F2F4F9;border:1px solid transparent;border-radius:var(--r-pill);
  transition:background-color .2s var(--ease),border-color .2s var(--ease);
}
.search-box:focus-within{background:#fff;border-color:var(--accent-500)}
.search-box svg{flex:0 0 auto;opacity:.55}
.search-box input{
  border:0;background:transparent;outline:none;width:150px;font-size:14px;
}
.search-box input::placeholder{color:#98A0BA}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line);background:#fff;border-radius:12px;
  align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle:hover{border-color:var(--accent-500)}
.mobile-drawer{
  position:fixed;left:0;right:0;top:56px;bottom:0;z-index:70;background:#fff;
  padding:20px 20px 140px;overflow-y:auto;
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s;
}
.mobile-drawer.is-open{opacity:1;visibility:visible;transform:translateY(0)}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 4px;border-bottom:1px solid var(--line);
  font-size:17px;font-weight:600;color:var(--ink-700);
}
.drawer-link:hover,.drawer-link:active{color:var(--accent-600)}
.drawer-cta{margin-top:24px}
.drawer-note{margin-top:18px;font-size:13px;color:var(--muted)}
@media(max-width:1023px){
  .header-inner{height:56px;gap:12px}
  .nav-main,.search-box{display:none}
  .nav-toggle{display:inline-flex}
  .brand-text{font-size:16px}
}
@media(min-width:1024px){
  .mobile-drawer{display:none}
}

/* ---------- 页面标题区 ---------- */
.page-head{background:#fff;border-bottom:1px solid var(--line);padding:32px 0 34px}
.breadcrumb{font-size:13px;color:var(--muted)}
.breadcrumb ol{display:flex;flex-wrap:wrap;list-style:none}
.breadcrumb li{display:flex;align-items:center;min-width:0}
.breadcrumb li+li::before{content:"/";margin:0 9px;color:#C3C9DC}
.breadcrumb a{color:var(--muted);transition:color .2s var(--ease);max-width:220px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.breadcrumb a:hover{color:var(--accent-600)}
.breadcrumb [aria-current="page"]{color:var(--ink-700);font-weight:600;max-width:260px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;display:inline-block;vertical-align:bottom}
.article-title{
  font-size:clamp(28px,3.6vw,42px);line-height:1.28;margin-top:18px;color:var(--ink-900);
  max-width:880px;
}
.article-meta{
  display:flex;align-items:center;flex-wrap:wrap;gap:10px;
  margin-top:16px;font-size:13px;color:var(--muted);
}
.article-meta .dot{color:#C3C9DC}

/* ---------- 正文区 ---------- */
.article-wrap{padding:52px 0 72px}
.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;align-items:start}
.article-main{max-width:760px;min-width:0}
.article-body{font-size:17.5px;line-height:1.9;color:#232B4D}
.article-body p{margin:0 0 1.15em}
.article-body h2{
  position:relative;padding-left:16px;margin:2.1em 0 .75em;
  font-size:clamp(22px,2.4vw,28px);color:var(--ink-900);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:4px;
  background:var(--accent-500);border-radius:2px;
}
.article-body h3{font-size:20px;margin:1.7em 0 .6em;color:var(--ink-700)}
.article-body h4{font-size:17px;margin:1.4em 0 .5em;color:var(--ink-700)}
.article-body ul{list-style:disc;padding-left:1.35em;margin:0 0 1.2em}
.article-body ol{list-style:decimal;padding-left:1.45em;margin:0 0 1.2em}
.article-body li{margin:.4em 0}
.article-body li::marker{color:var(--accent-500);font-weight:700}
.article-body blockquote{
  margin:1.6em 0;padding:18px 22px;background:#F2F4FB;
  border-left:4px solid var(--accent-500);border-radius:0 var(--r-card) var(--r-card) 0;
  color:var(--ink-700);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-card);margin:1.4em auto .6em}
.article-body figure{margin:1.6em 0;max-width:100%;overflow-x:auto}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:6px}
.article-body a{color:var(--accent-600);border-bottom:1px solid rgba(255,90,31,.35);transition:border-color .2s var(--ease)}
.article-body a:hover{border-bottom-color:var(--accent-600)}
.article-body code{background:#F2F4F9;border-radius:6px;padding:2px 6px;font-size:15px;color:var(--ink-700)}
.article-body pre{background:var(--ink-900);color:#E7EAF6;padding:18px 20px;border-radius:var(--r-card);overflow-x:auto;font-size:14.5px}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;min-width:520px;margin:1.4em 0}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-body th{background:#F6F7FB;font-weight:700;color:var(--ink-700)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2em 0}
.article-body>*:first-child{margin-top:0}
.article-foot{
  margin-top:40px;padding-top:24px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;
}
.article-empty{
  background:#fff;border:1px dashed var(--line);border-radius:var(--r-card);
  padding:40px 28px;text-align:center;
}
.article-empty h2{font-size:22px;color:var(--ink-900)}
.article-empty p{color:var(--muted);margin:12px 0 22px}

/* ---------- 侧栏 ---------- */
.article-side{position:sticky;top:88px;display:grid;gap:20px}
.side-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:20px;box-shadow:var(--shadow-1)}
.side-title{
  display:flex;align-items:center;gap:8px;font-size:15px;font-weight:800;
  color:var(--ink-900);margin-bottom:14px;
}
.side-title::before{content:"";width:18px;height:3px;border-radius:2px;background:var(--accent-500)}
.side-card .toc-list{list-style:none;display:grid;gap:2px}
.side-card .toc-list a{
  display:block;font-size:14px;color:var(--muted);padding:6px 0 6px 10px;
  border-left:2px solid transparent;transition:color .2s var(--ease),border-color .2s var(--ease);
}
.side-card .toc-list a:hover{color:var(--accent-600);border-left-color:var(--accent-500)}
.side-links{list-style:none;display:grid;gap:12px}
.side-links a{display:flex;gap:12px;align-items:flex-start;font-size:14px;color:var(--ink-700);line-height:1.6}
.side-links a:hover{color:var(--accent-600)}
.side-links img{width:64px;height:48px;object-fit:cover;border-radius:10px;flex:0 0 auto}
.side-links .no{font-size:12px;font-weight:800;color:var(--accent-500);line-height:1.6}
.side-cta{background:var(--ink-900);border:0;color:#fff;position:relative;overflow:hidden}
.side-cta::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.45) 1px,transparent 1px);
  background-size:22px 22px;opacity:.12;
}
.side-cta h3{font-size:17px;color:#fff;position:relative;z-index:1}
.side-cta p{font-size:13.5px;color:#C9CFE6;margin:10px 0 16px;position:relative;z-index:1;line-height:1.7}
.side-cta .btn{position:relative;z-index:1;width:100%;justify-content:center}
@media(max-width:1023px){
  .article-grid{grid-template-columns:1fr;gap:36px}
  .article-side{position:static}
}

/* ---------- 常用入口 ---------- */
.quick-links{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:22px 0}
.quick-inner{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.quick-label{font-size:13px;font-weight:700;color:var(--muted);letter-spacing:.06em}
.quick-inner a{
  display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:var(--r-pill);
  background:var(--bg);border:1px solid var(--line);font-size:14px;color:var(--ink-700);
  transition:border-color .2s var(--ease),color .2s var(--ease),background-color .2s var(--ease);
}
.quick-inner a:hover{border-color:var(--accent-500);color:var(--accent-600);background:var(--accent-050)}

/* ---------- 相关推荐 ---------- */
.related{padding:72px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:32px}
.section-head h2{font-size:clamp(24px,2.6vw,32px);color:var(--ink-900);position:relative;padding-left:16px}
.section-head h2::before{content:"";position:absolute;left:0;top:.24em;bottom:.24em;width:4px;background:var(--accent-500);border-radius:2px}
.section-head .sub{font-size:14px;color:var(--muted);margin-top:8px}
.text-link{font-size:14px;font-weight:700;color:var(--accent-600);display:inline-flex;align-items:center;gap:6px}
.text-link .arrow{transition:transform .2s var(--ease)}
.text-link:hover .arrow{transform:translateX(4px)}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--ink-100)}
.card-media{overflow:hidden;aspect-ratio:16/10}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .2s var(--ease)}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:20px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{
  font-size:18px;line-height:1.5;color:var(--ink-900);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-body p{
  font-size:14px;color:var(--muted);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.card-meta{margin-top:auto;display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.card-meta .dot{color:#C3C9DC}
@media(max-width:1023px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:639px){.card-grid{grid-template-columns:1fr}.related{padding:56px 0}}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--ink-900);color:#fff;position:relative;overflow:hidden;
  padding:72px 0;
}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:26px 26px;opacity:.14;animation:breathe 6s ease-in-out infinite;
}
@keyframes breathe{0%,100%{opacity:.09}50%{opacity:.16}}
.cta-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:center}
.cta-band h2{font-size:clamp(24px,2.8vw,34px);color:#fff}
.cta-band p{color:#C9CFE6;margin-top:14px;font-size:16px;max-width:560px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;justify-content:flex-end}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.4)}
.btn-outline-light:hover{border-color:#fff;background:rgba(255,255,255,.08)}
@media(max-width:1023px){
  .cta-inner{grid-template-columns:1fr;gap:26px}
  .cta-actions{justify-content:flex-start}
  .cta-band{padding:56px 0}
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink-900);color:#C9CFE6;position:relative;overflow:hidden;
  border-top:1px solid rgba(255,255,255,.08);padding:64px 0 28px;
}
.site-footer::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:26px 26px;opacity:.1;
}
.site-footer .container{position:relative;z-index:1}
.footer-top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px}
.brand-text{color:#fff}
.footer-desc{font-size:14px;line-height:1.8;margin-top:14px;max-width:320px;color:#A9B2CE}
.footer-col h4{font-size:14px;color:#fff;margin-bottom:16px;letter-spacing:.02em}
.footer-col a{display:block;font-size:14px;color:#C9CFE6;padding:5px 0;transition:color .2s var(--ease)}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.footer-contact{list-style:none;font-size:14px;line-height:1.9}
.footer-contact li{color:#A9B2CE}
.footer-contact strong{color:#fff;font-weight:600}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:#8F99B8;
}
@media(max-width:1023px){
  .footer-top{grid-template-columns:1fr 1fr;gap:28px}
}
@media(max-width:639px){
  .footer-top{grid-template-columns:1fr}
  .site-footer{padding:48px 0 24px}
}

/* ---------- 底部转化条 ---------- */
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:80;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  background:#fff;border-top:1px solid var(--line);
  padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  box-shadow:0 -8px 24px -18px rgba(11,16,38,.28);
}
.mobile-bar span{font-size:13.5px;color:var(--ink-700);font-weight:600}
@media(min-width:1024px){.mobile-bar{display:none}}
@media(max-width:1023px){body{padding-bottom:78px}}
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:75;width:268px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-2);padding:18px;display:none;
}
.float-cta.is-show{display:block}
.float-cta h4{font-size:15px;color:var(--ink-900)}
.float-cta p{font-size:13.5px;color:var(--muted);margin:8px 0 14px;line-height:1.7}
.float-close{
  position:absolute;top:8px;right:8px;width:26px;height:26px;border:0;border-radius:8px;
  background:var(--bg);color:var(--muted);cursor:pointer;font-size:15px;line-height:1;
}
.float-close:hover{background:var(--accent-050);color:var(--accent-600)}

/* ---------- 入场动画 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .22s ease-out,transform .22s ease-out}
.reveal.is-in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .cta-band::after{animation:none}
  html{scroll-behavior:auto}
}

/* roulang page: category1 */
:root{
  --ink-900:#0B1026;
  --ink-700:#1E2A5A;
  --ink-500:#3A477F;
  --ink-100:#E7EAF6;
  --accent-500:#FF5A1F;
  --accent-600:#DE4510;
  --accent-050:#FFF1EA;
  --mint-400:#46D5C8;
  --bg:#F6F7FB;
  --card:#FFFFFF;
  --line:#E6E9F2;
  --text:#0F1533;
  --muted:#5C6480;
  --r-card:14px;
  --r-btn:12px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(11,16,38,.04);
  --sh-2:0 16px 40px -20px rgba(11,16,38,.18);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  font-size:16px;line-height:1.8;color:var(--text);background:var(--bg);
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent-500);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 32px}}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--sh-1)}
.header-inner{display:flex;align-items:center;gap:20px;height:64px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;flex:0 0 auto}
.brand-text{font-weight:800;font-size:16px;letter-spacing:-.01em;color:var(--ink-900);white-space:nowrap}
.nav-main{display:flex;align-items:center;gap:2px;margin-left:6px}
.nav-link{padding:7px 13px;border-radius:var(--r-pill);font-size:15px;color:var(--ink-700);transition:background .18s ease-out,color .18s ease-out,box-shadow .18s ease-out}
.nav-link:hover{background:var(--accent-050);color:var(--accent-600)}
.nav-link:active{transform:translateY(1px)}
.nav-link.is-active{color:var(--accent-600);background:var(--accent-050);box-shadow:inset 0 -2px 0 var(--accent-500)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.search-box{display:flex;align-items:center;gap:8px;height:40px;padding:0 14px;border-radius:var(--r-pill);background:#F2F4F9;border:1px solid transparent;transition:background .18s ease-out,border-color .18s ease-out}
.search-box:hover{background:#EDF0F7}
.search-box:focus-within{background:#fff;border-color:var(--accent-500)}
.search-box input{border:0;background:transparent;outline:none;width:140px;font-size:14px}
.search-box input::placeholder{color:#939AB4}
.search-box svg{flex:0 0 auto;color:var(--muted)}
.menu-toggle{display:none;align-items:center;justify-content:center;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;cursor:pointer;transition:border-color .18s ease-out,color .18s ease-out}
.menu-toggle:hover{border-color:var(--accent-500);color:var(--accent-600)}
.mobile-drawer{display:none;border-top:1px solid var(--line);background:#fff;padding:16px 20px 22px}
.site-header.drawer-open .mobile-drawer{display:block}
.mobile-drawer a{display:block;padding:12px 4px;font-size:16px;border-bottom:1px solid var(--line);color:var(--ink-700)}
.mobile-drawer a.is-active{color:var(--accent-600);font-weight:700}
.mobile-drawer .btn{width:100%;justify-content:center;margin-top:16px}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:var(--r-btn);font-weight:600;font-size:15px;border:1px solid transparent;cursor:pointer;transition:background .2s ease-out,color .2s ease-out,border-color .2s ease-out,transform .12s ease-out}
.btn .arrow{transition:transform .2s ease-out}
.btn:hover .arrow{transform:translateX(4px)}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--accent-500);color:#fff}
.btn-primary:hover{background:var(--accent-600)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink-700)}
.btn-ghost:hover{border-color:var(--accent-500);color:var(--accent-600);background:#fff}
.btn-sm{padding:9px 16px;font-size:14px}

/* ---------- hero ---------- */
.page-hero{position:relative;background:#EFF2FB;border-bottom:1px solid var(--line);overflow:hidden}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(11,16,38,.22) 1px, transparent 1px);
  background-size:24px 24px;opacity:.14;pointer-events:none;
  animation:starbreathe 6s ease-in-out infinite;
}
@keyframes starbreathe{0%,100%{opacity:.08}50%{opacity:.16}}
.hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:56px;align-items:center;padding:72px 0 64px}
.eyebrow{display:inline-block;font-size:12px;letter-spacing:.08em;color:var(--accent-600);background:var(--accent-050);border:1px solid #FFD9C9;border-radius:var(--r-pill);padding:5px 14px}
.page-hero h1{font-size:clamp(28px,3.6vw,42px);font-weight:800;letter-spacing:-.02em;line-height:1.28;margin:18px 0 16px;color:var(--ink-900)}
.hero-sub{font-size:17px;color:var(--muted);max-width:520px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-media{position:relative;border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-2);border:1px solid var(--line);background:var(--ink-900)}
.hero-media img{width:100%;height:360px;object-fit:cover}
.hero-media figcaption{position:absolute;left:0;right:0;bottom:0;padding:16px 18px;background:linear-gradient(180deg, rgba(11,16,38,0), rgba(11,16,38,.86));color:#fff;font-size:13px;letter-spacing:.02em}

/* ---------- stats strip ---------- */
.stat-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:44px;border-top:1px solid rgba(11,16,38,.1);padding-top:22px}
.stat-item{padding:0 22px;border-left:1px solid rgba(11,16,38,.1)}
.stat-item:first-child{border-left:0;padding-left:0}
.stat-num{font-family:'Inter',ui-sans-serif,system-ui,sans-serif;font-size:30px;font-weight:700;color:var(--ink-900);letter-spacing:-.02em}
.stat-num em{font-style:normal;color:var(--mint-400)}
.stat-label{font-size:13px;color:var(--muted)}

/* ---------- breadcrumb ---------- */
.crumb{padding:20px 0 0;font-size:13px;color:var(--muted)}
.crumb ol{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.crumb li+li::before{content:"/";margin-right:8px;color:#B9BFD4}
.crumb a:hover{color:var(--accent-600)}

/* ---------- sections ---------- */
.section{padding:96px 0}
.section-tight{padding:64px 0}
.section-head{max-width:720px;margin-bottom:40px}
.section-head h2{position:relative;font-size:clamp(24px,2.6vw,34px);font-weight:800;letter-spacing:-.02em;line-height:1.3;padding-left:18px}
.section-head h2::before{content:"";position:absolute;left:0;top:.28em;bottom:.14em;width:4px;border-radius:2px;background:var(--accent-500)}
.section-head p{margin-top:14px;color:var(--muted);font-size:16px}

/* ---------- data cards ---------- */
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.data-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:24px 22px;box-shadow:var(--sh-1);transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out}
.data-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--ink-100)}
.data-card .k{font-size:13px;color:var(--muted)}
.data-card .v{font-family:'Inter',ui-sans-serif,system-ui,sans-serif;font-size:32px;font-weight:700;color:var(--ink-900);letter-spacing:-.02em;margin:6px 0 8px}
.data-card .v em{font-style:normal;color:var(--mint-400)}
.data-card p{font-size:14px;color:var(--muted);line-height:1.8}

/* ---------- content + sticky side ---------- */
.content-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:56px;align-items:start}
.prose h2{position:relative;padding-left:16px;font-size:clamp(22px,2.4vw,30px);font-weight:800;letter-spacing:-.02em;margin:52px 0 16px;line-height:1.35}
.prose > h2:first-child{margin-top:0}
.prose h2::before{content:"";position:absolute;left:0;top:.34em;bottom:.16em;width:4px;border-radius:2px;background:var(--accent-500)}
.prose h3{font-size:19px;font-weight:700;margin:28px 0 10px;color:var(--ink-900)}
.prose p{color:var(--muted);margin-bottom:14px}
.prose ul{margin:6px 0 20px}
.prose ul li{position:relative;padding-left:20px;color:var(--muted);margin-bottom:8px}
.prose ul li::before{content:"";position:absolute;left:0;top:.72em;width:8px;height:2px;background:var(--mint-400);border-radius:2px}
.prose figure{margin:24px 0;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);background:#fff}
.prose figure img{width:100%;height:280px;object-fit:cover}
.prose figcaption{padding:12px 16px;font-size:13px;color:var(--muted);border-top:1px solid var(--line)}

.side-card{position:sticky;top:88px;display:flex;flex-direction:column;gap:18px}
.toc-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:22px;box-shadow:var(--sh-1)}
.toc-card h3{font-size:14px;letter-spacing:.06em;color:var(--ink-700);margin-bottom:12px}
.toc-card a{display:block;font-size:14px;color:var(--muted);padding:8px 10px;border-left:2px solid transparent;border-radius:0 8px 8px 0;transition:all .18s ease-out}
.toc-card a:hover{color:var(--accent-600);background:var(--accent-050);border-left-color:var(--accent-500)}
.side-cta{background:var(--ink-900);border-radius:var(--r-card);padding:24px;color:#fff;position:relative;overflow:hidden}
.side-cta::after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.5) 1px, transparent 1px);background-size:20px 20px;opacity:.09;pointer-events:none}
.side-cta h3{font-size:18px;font-weight:700;margin-bottom:8px;position:relative}
.side-cta p{font-size:14px;color:#C9CFE6;margin-bottom:18px;position:relative}
.side-cta .btn{width:100%;position:relative}

/* ---------- scene cards ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.scene-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out}
.scene-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--ink-100)}
.scene-card .thumb{overflow:hidden}
.scene-card .thumb img{width:100%;height:190px;object-fit:cover;transition:transform .22s ease-out}
.scene-card:hover .thumb img{transform:scale(1.03)}
.scene-body{padding:20px 22px 24px}
.badge{display:inline-block;font-size:12px;letter-spacing:.06em;color:var(--accent-600);background:var(--accent-050);border-radius:var(--r-pill);padding:4px 12px}
.scene-body h3{font-size:19px;font-weight:700;margin:12px 0 8px;color:var(--ink-900)}
.scene-body p{font-size:14px;color:var(--muted);margin-bottom:14px}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--accent-600)}
.link-more .arrow{transition:transform .2s ease-out}
.link-more:hover .arrow{transform:translateX(4px)}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line);margin-top:14px}
.step{position:relative;padding:32px 24px 0 0}
.step::before{content:"";position:absolute;top:-5px;left:0;width:10px;height:10px;border-radius:50%;background:var(--accent-500);box-shadow:0 0 0 4px rgba(255,90,31,.14)}
.step .n{font-family:'Inter',ui-sans-serif,system-ui,sans-serif;font-size:13px;font-weight:700;color:var(--accent-600);letter-spacing:.08em}
.step h3{font-size:18px;font-weight:700;margin:8px 0 8px;color:var(--ink-900)}
.step p{font-size:14px;color:var(--muted);padding-right:18px}

/* ---------- faq ---------- */
.faq-wrap{max-width:860px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:22px 0;font-size:17px;font-weight:600;color:var(--ink-900);transition:color .18s ease-out}
.faq-item summary:hover{color:var(--accent-600)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"＋";color:var(--accent-500);font-size:18px;line-height:1;flex:0 0 auto}
.faq-item[open] summary::after{content:"－"}
.faq-body{padding:0 0 22px 16px;margin-left:0;border-left:1px solid var(--accent-500);color:var(--muted);font-size:15px;animation:fadeUp .22s ease-out}
@keyframes fadeUp{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* ---------- cta band ---------- */
.cta-band{background:var(--ink-900);border-radius:18px;padding:56px 48px;color:#fff;position:relative;overflow:hidden;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-band::after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.55) 1px, transparent 1px);background-size:22px 22px;opacity:.09;pointer-events:none}
.cta-band h2{position:relative;font-size:clamp(22px,2.4vw,30px);font-weight:800;letter-spacing:-.02em}
.cta-band p{position:relative;color:#C9CFE6;font-size:15px;margin-top:10px;max-width:560px}
.cta-band .btn{position:relative}

/* ---------- footer ---------- */
.site-footer{
  background:var(--ink-900);color:#C9CFE6;padding:72px 0 28px;position:relative;overflow:hidden;
  background-image:radial-gradient(rgba(255,255,255,.4) 1px, transparent 1px);background-size:24px 24px;
}
.site-footer::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg, rgba(11,16,38,.9), rgba(11,16,38,1));pointer-events:none}
.site-footer>.container{position:relative}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:40px;padding-bottom:8px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-text{color:#fff;font-size:17px;font-weight:800}
.footer-desc{font-size:14px;line-height:1.9;color:#9AA3C4;max-width:340px}
.footer-col h4{color:#fff;font-size:14px;letter-spacing:.06em;margin-bottom:16px}
.footer-col a{display:block;font-size:14px;color:#C9CFE6;padding:5px 0;transition:color .18s ease-out}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.footer-contact li{font-size:14px;line-height:2}
.footer-contact strong{color:#fff;font-weight:600}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;border-top:1px solid rgba(255,255,255,.12);margin-top:44px;padding-top:22px;font-size:13px;color:#8A93B5}

/* ---------- floating bars ---------- */
.mobile-bar{display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;align-items:center;justify-content:space-between;gap:12px;background:#fff;border-top:1px solid var(--line);box-shadow:0 -8px 24px -18px rgba(11,16,38,.5);padding:10px 16px calc(10px + env(safe-area-inset-bottom))}
.mobile-bar span{font-size:13px;color:var(--muted)}
.desk-float{position:fixed;right:24px;bottom:28px;z-index:55;display:none;align-items:center;gap:14px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-2);padding:14px 16px;max-width:330px}
.desk-float.show{display:flex}
.desk-float p{font-size:13px;color:var(--muted);line-height:1.6}
.desk-float button{border:0;background:transparent;color:#939AB4;cursor:pointer;font-size:16px;line-height:1;padding:2px 4px}
.desk-float button:hover{color:var(--ink-900)}

/* ---------- reveal ---------- */
.js .reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease-out,transform .5s ease-out}
.js .reveal.is-in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1200px){
  .search-box input{width:110px}
}
@media (max-width:1023px){
  .nav-main,.search-box{display:none}
  .menu-toggle{display:inline-flex}
  .content-layout{grid-template-columns:1fr;gap:36px}
  .side-card{position:static}
  .data-grid{grid-template-columns:repeat(2,1fr)}
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .step{padding-top:28px}
  .footer-top{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .hero-grid{grid-template-columns:1fr;gap:32px;padding:48px 0 52px}
  .hero-media img{height:230px}
  .stat-strip{grid-template-columns:repeat(2,1fr);gap:18px 0}
  .stat-item{padding:0 16px;border-left:0}
  .stat-item:nth-child(odd){padding-left:0}
  .section{padding:56px 0}
  .section-tight{padding:44px 0}
  .data-grid,.scene-grid,.steps{grid-template-columns:1fr}
  .step{padding-right:0}
  .cta-band{padding:36px 24px;border-radius:14px}
  .footer-top{grid-template-columns:1fr;gap:30px}
  .site-footer{padding:52px 0 24px}
  .mobile-bar{display:flex}
  body{padding-bottom:70px}
  .faq-item summary{font-size:15px}
}
@media (min-width:768px){
  .desk-float.show{display:flex}
}
@media (prefers-reduced-motion: reduce){
  *{animation:none!important;transition:none!important}
  .js .reveal{opacity:1!important;transform:none!important}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
:root{
  --ink-900:#0B1026;
  --ink-700:#1E2A5A;
  --ink-500:#3A477F;
  --ink-100:#E7EAF6;
  --accent-500:#FF5A1F;
  --accent-600:#DE4510;
  --accent-050:#FFF1EA;
  --mint-400:#46D5C8;
  --bg:#F6F7FB;
  --card:#FFFFFF;
  --line:#E6E9F2;
  --text:#0F1533;
  --muted:#5C6480;
  --radius-card:14px;
  --radius-btn:12px;
  --shadow-1:0 1px 2px rgba(11,16,38,.04);
  --shadow-2:0 16px 40px -20px rgba(11,16,38,.18);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,-apple-system,sans-serif;
  font-size:16px;line-height:1.8;color:var(--text);background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--accent-500);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 32px}}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid var(--line);box-shadow:var(--shadow-1);
}
.header-inner{display:flex;align-items:center;gap:16px;height:56px}
@media (min-width:1024px){.header-inner{height:64px;gap:20px}}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-mark{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px}
.brand-text{
  font-size:16px;font-weight:800;letter-spacing:-.02em;color:var(--ink-900);white-space:nowrap;
}
@media (min-width:1024px){.brand-text{font-size:17px}}
.nav-main{display:none;align-items:center;gap:2px}
@media (min-width:1024px){.nav-main{display:flex;margin-left:8px}}
.nav-link{
  display:inline-block;padding:8px 14px;border-radius:999px;font-size:15px;
  color:var(--muted);transition:background .2s ease-out,color .2s ease-out;
}
.nav-link:hover{color:var(--ink-900);background:#F2F4F9}
.nav-link.is-active{color:var(--accent-600);background:var(--accent-050);font-weight:700}
.nav-search{
  display:none;align-items:center;gap:8px;height:40px;padding:0 16px;
  margin-left:auto;background:#F2F4F9;border:1px solid transparent;border-radius:999px;
  transition:background .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
}
@media (min-width:1024px){.nav-search{display:flex}}
.nav-search:focus-within{background:#fff;border-color:var(--accent-500);box-shadow:0 0 0 3px rgba(255,90,31,.12)}
.nav-search svg{flex:none;color:var(--muted)}
.nav-search input{
  width:150px;border:0;background:transparent;outline:none;font-size:14px;color:var(--text);
}
.nav-search input::placeholder{color:#98A0B8}
.nav-cta{display:none}
@media (min-width:1024px){.nav-cta{display:inline-flex;margin-left:0}}
.nav-burger{
  display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;
  margin-left:auto;border-radius:12px;border:1px solid var(--line);background:#fff;
  transition:background .2s ease-out,border-color .2s ease-out;
}
.nav-burger:hover{background:#F2F4F9;border-color:var(--ink-100)}
@media (min-width:1024px){.nav-burger{display:none}}

/* 移动抽屉 */
.drawer{
  position:fixed;left:0;right:0;top:56px;bottom:0;z-index:55;background:#fff;
  padding:20px;display:flex;flex-direction:column;gap:6px;overflow-y:auto;
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .2s ease-out,transform .2s ease-out,visibility .2s ease-out;
}
.drawer.is-open{opacity:1;visibility:visible;transform:none}
.drawer .drawer-link{
  display:block;padding:14px 16px;border-radius:12px;font-size:16px;color:var(--ink-900);
  border:1px solid var(--line);background:#fff;
}
.drawer .drawer-link:hover{background:#F2F4F9}
.drawer .drawer-link.is-active{background:var(--accent-050);border-color:#FFD9C7;color:var(--accent-600);font-weight:700}
.drawer-foot{margin-top:auto;padding-top:20px;border-top:1px solid var(--line)}
@media (min-width:1024px){.drawer{display:none}}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:var(--radius-btn);border:1px solid transparent;
  font-size:15px;font-weight:700;letter-spacing:0;cursor:pointer;
  transition:background .2s ease-out,color .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out,transform .2s ease-out;
}
.btn-arrow{transition:transform .2s ease-out}
.btn-primary{background:var(--accent-500);color:#fff;box-shadow:var(--shadow-1)}
.btn-primary:hover{background:var(--accent-600)}
.btn-primary:hover .btn-arrow{transform:translateX(4px)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:#fff;color:var(--ink-900);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--ink-100);background:#F2F4F9}
.btn-ghost:active{transform:translateY(1px)}
.btn-light{background:#fff;color:var(--ink-900)}
.btn-light:hover{background:#F2F4F9}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-block{width:100%}

/* ============ Hero ============ */
.hero{background:#fff;border-bottom:1px solid var(--line);padding:36px 0 56px}
@media (min-width:768px){.hero{padding:48px 0 72px}}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:28px}
.crumb li{display:flex;align-items:center;gap:8px}
.crumb li+li::before{content:"/";color:#C3C9DB}
.crumb a{color:var(--muted);transition:color .2s ease-out}
.crumb a:hover{color:var(--accent-600)}
.crumb .current{color:var(--ink-900);font-weight:600}
.hero-grid{display:grid;grid-template-columns:1fr;gap:40px;align-items:center}
@media (min-width:1024px){.hero-grid{grid-template-columns:1.05fr .95fr;gap:56px}}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  background:var(--accent-050);color:var(--accent-600);font-size:12px;font-weight:700;letter-spacing:.08em;
  margin-bottom:18px;
}
.hero h1{
  font-size:clamp(28px,3.6vw,42px);line-height:1.32;font-weight:800;letter-spacing:-.02em;
  color:var(--ink-900);margin-bottom:18px;
}
.hero h1 .hl{color:var(--accent-500)}
.hero-sub{font-size:17px;color:var(--muted);max-width:560px;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:36px}
.hero-stats{display:flex;flex-wrap:wrap;gap:0 28px;padding-top:24px;border-top:1px solid var(--line)}
.hero-stat{padding-right:28px;border-right:1px solid var(--line);margin-bottom:12px}
.hero-stat:last-child{border-right:0;padding-right:0}
.hero-stat b{display:block;font-family:'Inter',system-ui,sans-serif;font-size:26px;font-weight:800;color:var(--ink-900);letter-spacing:-.02em}
.hero-stat span{font-size:13px;color:var(--muted)}
.hero-figure{
  position:relative;border-radius:var(--radius-card);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow-2);
}
.hero-figure img{width:100%;height:auto;object-fit:cover;aspect-ratio:4/3}
.hero-figure::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(11,16,38,.42) 0%,rgba(11,16,38,.06) 55%,rgba(11,16,38,0) 100%);
}
.hero-figure figcaption{
  position:absolute;left:20px;bottom:18px;z-index:2;color:#fff;font-size:13px;letter-spacing:.02em;
  text-shadow:0 1px 6px rgba(11,16,38,.5);
}

/* ============ 通用板块 ============ */
.section{padding:64px 0}
@media (min-width:1024px){.section{padding:96px 0}}
.section-head{margin-bottom:36px;max-width:760px}
.section-title{
  display:flex;align-items:center;gap:12px;font-size:clamp(24px,2.6vw,34px);
  font-weight:800;letter-spacing:-.02em;line-height:1.3;color:var(--ink-900);
}
.section-title::before{content:"";flex:none;width:4px;height:28px;border-radius:2px;background:var(--accent-500)}
.section-desc{margin-top:14px;color:var(--muted);font-size:16px}
.head-row{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px}
.text-link{color:var(--ink-900);font-size:14px;font-weight:700;display:inline-flex;align-items:center;gap:6px;transition:color .2s ease-out}
.text-link:hover{color:var(--accent-600)}
.text-link:hover .btn-arrow{transform:translateX(4px)}

/* ============ 标签筛选 ============ */
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:32px}
.chip{
  padding:8px 18px;border-radius:999px;border:1px solid var(--line);background:#fff;
  font-size:14px;color:var(--muted);transition:background .2s ease-out,color .2s ease-out,border-color .2s ease-out,transform .2s ease-out;
}
.chip:hover{border-color:var(--ink-100);color:var(--ink-900)}
.chip:active{transform:translateY(1px)}
.chip.is-active{background:var(--accent-500);border-color:var(--accent-500);color:#fff;font-weight:700}

/* ============ 卡网格 ============ */
.card-grid{display:grid;grid-template-columns:1fr;gap:22px}
@media (min-width:768px){.card-grid{grid-template-columns:repeat(2,1fr);gap:24px}}
.card{
  display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform .22s ease-out,box-shadow .22s ease-out,border-color .22s ease-out;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--ink-100)}
.card-media{overflow:hidden;background:#EEF1F8}
.card-media img{width:100%;height:auto;aspect-ratio:16/10;object-fit:cover;transition:transform .22s ease-out}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1}
.badge{
  display:inline-flex;align-items:center;padding:4px 12px;border-radius:999px;
  background:var(--accent-050);color:var(--accent-600);font-size:12px;font-weight:700;letter-spacing:.06em;
  align-self:flex-start;margin-bottom:14px;
}
.card-title{
  font-size:19px;font-weight:700;line-height:1.5;color:var(--ink-900);letter-spacing:-.01em;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .2s ease-out;
}
.card:hover .card-title{color:var(--accent-600)}
.card-text{
  margin-top:10px;font-size:14px;color:var(--muted);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.card-meta{
  margin-top:auto;padding-top:18px;display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--muted);border-top:1px solid var(--line);margin-top:20px;
}
.card-meta .dot{color:#C3C9DB}
.card-empty{
  grid-column:1/-1;background:#FBFCFE;border:1px dashed #CBD3E6;border-radius:var(--radius-card);
  padding:48px 24px;text-align:center;color:var(--muted);
}
.card-empty strong{display:block;color:var(--ink-900);font-size:17px;margin-bottom:8px}

/* ============ 说明列表（非对称） ============ */
.split{display:grid;grid-template-columns:1fr;gap:36px}
@media (min-width:1024px){.split{grid-template-columns:5fr 7fr;gap:64px;align-items:start}}
.split-aside{position:sticky;top:96px}
@media (max-width:1023px){.split-aside{position:static}}
.split-aside h2{
  display:flex;align-items:flex-start;gap:12px;font-size:clamp(24px,2.6vw,34px);
  font-weight:800;letter-spacing:-.02em;line-height:1.32;color:var(--ink-900);
}
.split-aside h2::before{content:"";flex:none;width:4px;height:28px;border-radius:2px;background:var(--accent-500);margin-top:6px}
.split-aside p{margin-top:16px;color:var(--muted);font-size:16px}
.info-list{border-top:1px solid var(--line)}
.info-item{display:flex;gap:20px;padding:26px 0;border-bottom:1px solid var(--line);transition:transform .22s ease-out}
.info-item:hover{transform:translateX(2px)}
.info-num{
  flex:none;font-family:'Inter',system-ui,sans-serif;font-size:15px;font-weight:800;
  color:var(--accent-500);letter-spacing:.04em;padding-top:4px;min-width:34px;
}
.info-item h3{font-size:19px;font-weight:700;color:var(--ink-900);margin-bottom:8px}
.info-item p{font-size:15px;color:var(--muted);line-height:1.8}

/* ============ 深色数据带 ============ */
.band{
  position:relative;background:var(--ink-900);color:#fff;overflow:hidden;
  padding:64px 0;
}
@media (min-width:1024px){.band{padding:88px 0}}
.band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.55) 1px,transparent 1px);
  background-size:24px 24px;opacity:.10;animation:starry 6s ease-in-out infinite;
}
@keyframes starry{0%,100%{opacity:.08}50%{opacity:.14}}
.band-inner{position:relative;z-index:1}
.band h2{color:#fff}
.band h2::before{background:var(--accent-500)}
.band .section-desc{color:#AEB6D4}
.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px 20px;margin-top:40px}
@media (min-width:768px){.stat-grid{grid-template-columns:repeat(4,1fr);gap:24px}}
.stat-item{padding-top:20px;border-top:1px solid rgba(255,255,255,.14)}
.stat-item b{
  display:block;font-family:'Inter',system-ui,sans-serif;font-size:clamp(30px,3.4vw,40px);
  font-weight:800;letter-spacing:-.02em;color:var(--mint-400);line-height:1.1;
}
.stat-item span{display:block;margin-top:10px;font-size:14px;color:#AEB6D4;line-height:1.7}

/* ============ 流程步骤 ============ */
.steps{display:grid;grid-template-columns:1fr;gap:0;margin-top:12px}
@media (min-width:768px){.steps{grid-template-columns:repeat(4,1fr);gap:24px}}
.step{position:relative;padding:0 0 28px 30px;border-left:1px solid var(--line)}
@media (min-width:768px){
  .step{padding:30px 0 0 0;border-left:0;border-top:1px solid var(--line)}
}
.step::before{
  content:"";position:absolute;left:-5px;top:8px;width:9px;height:9px;border-radius:50%;
  background:var(--accent-500);box-shadow:0 0 0 4px rgba(255,90,31,.12);
}
@media (min-width:768px){.step::before{left:0;top:-5px}}
.step-idx{
  display:block;font-family:'Inter',system-ui,sans-serif;font-size:13px;font-weight:800;
  letter-spacing:.08em;color:var(--accent-500);margin-bottom:8px;
}
.step h3{font-size:17px;font-weight:700;color:var(--ink-900);margin-bottom:8px}
.step p{font-size:14px;color:var(--muted);line-height:1.75}

/* ============ FAQ ============ */
.faq-list{border-top:1px solid var(--line);max-width:860px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0;text-align:left;font-size:17px;font-weight:700;color:var(--ink-900);
  transition:color .2s ease-out;
}
.faq-q:hover{color:var(--accent-600)}
.faq-ico{
  flex:none;width:24px;height:24px;display:inline-flex;align-items:center;justify-content:center;
  color:var(--accent-500);font-size:20px;font-weight:400;line-height:1;transition:transform .2s ease-out;
}
.faq-item.is-open .faq-ico{transform:rotate(45deg)}
.faq-a{
  display:none;padding:0 0 24px 16px;border-left:1px solid var(--accent-500);
  margin-left:2px;color:var(--muted);font-size:15px;line-height:1.85;
}
.faq-item.is-open .faq-a{display:block;animation:fadeIn .22s ease-out}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@media (max-width:767px){.faq-q{font-size:15px}}

/* ============ CTA ============ */
.cta-band{
  background:var(--ink-900);color:#fff;border-radius:var(--radius-card);
  padding:48px 28px;display:grid;grid-template-columns:1fr;gap:28px;align-items:center;
  position:relative;overflow:hidden;
}
@media (min-width:1024px){.cta-band{grid-template-columns:1fr auto;padding:56px;gap:48px}}
.cta-band h2{font-size:clamp(24px,2.6vw,32px);font-weight:800;letter-spacing:-.02em;line-height:1.35}
.cta-band p{margin-top:12px;color:#AEB6D4;font-size:15px;max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;background:var(--ink-900);color:#C9CFE6;
  padding:56px 0 28px;margin-top:0;overflow:hidden;
}
@media (min-width:1024px){.site-footer{padding:72px 0 32px}}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:24px 24px;opacity:.08;animation:starry 6s ease-in-out infinite;
}
.site-footer .container{position:relative;z-index:1}
.footer-top{display:grid;grid-template-columns:1fr;gap:36px}
@media (min-width:768px){.footer-top{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-text{color:#fff;font-size:17px;font-weight:800}
.footer-desc{font-size:14px;line-height:1.85;color:#9AA3C4;max-width:340px}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px;letter-spacing:.02em}
.footer-col a{display:block;font-size:14px;color:#C9CFE6;padding:6px 0;transition:color .2s ease-out,text-underline-offset .2s ease-out}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.footer-contact li{font-size:14px;color:#9AA3C4;padding:6px 0;line-height:1.7}
.footer-contact strong{color:#E7EAF6;font-weight:600}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:#8A93B5;
}

/* ============ 底部转化条 ============ */
.sticky-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:50;
  background:#fff;border-top:1px solid var(--line);
  box-shadow:0 -8px 24px -18px rgba(11,16,38,.28);
  padding:12px 20px calc(12px + env(safe-area-inset-bottom));
  display:flex;align-items:center;gap:14px;justify-content:space-between;
}
.sticky-cta p{font-size:14px;font-weight:700;color:var(--ink-900);line-height:1.4}
.sticky-cta p span{display:block;font-size:12px;font-weight:400;color:var(--muted)}
@media (min-width:1024px){
  .sticky-cta{
    left:auto;right:24px;bottom:24px;width:340px;border-radius:var(--radius-card);
    border:1px solid var(--line);padding:18px;flex-direction:column;align-items:flex-start;
    transform:translateY(16px);opacity:0;visibility:hidden;
    transition:opacity .22s ease-out,transform .22s ease-out,visibility .22s ease-out;
  }
  .sticky-cta.is-visible{opacity:1;visibility:visible;transform:none}
  .sticky-cta .btn{width:100%}
}
.sticky-close{
  position:absolute;top:8px;right:8px;width:26px;height:26px;border-radius:50%;
  display:none;align-items:center;justify-content:center;color:var(--muted);font-size:15px;
  transition:background .2s ease-out,color .2s ease-out;
}
.sticky-close:hover{background:#F2F4F9;color:var(--ink-900)}
@media (min-width:1024px){.sticky-close{display:inline-flex}}

/* ============ 滚动入场 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .22s ease-out,transform .22s ease-out}
.reveal.is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
}
body.drawer-open{overflow:hidden}
@media (max-width:1023px){body{padding-bottom:76px}}

/* roulang page: category3 */
:root{
  --ink-900:#0B1026;
  --ink-700:#1E2A5A;
  --ink-500:#3A477F;
  --ink-100:#E7EAF6;
  --accent-500:#FF5A1F;
  --accent-600:#DE4510;
  --accent-050:#FFF1EA;
  --mint-400:#46D5C8;
  --bg:#F6F7FB;
  --card:#FFFFFF;
  --line:#E6E9F2;
  --text:#0F1533;
  --muted:#5C6480;
  --radius-card:14px;
  --radius-btn:12px;
  --shadow-1:0 1px 2px rgba(11,16,38,.04);
  --shadow-2:0 16px 40px -20px rgba(11,16,38,.18);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
html body{
  margin:0;
  font-family:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  letter-spacing:0;
}
img{display:block;max-width:100%;height:auto}
svg{display:block}
button{font-family:inherit}
input,select,textarea{font-family:inherit;font-size:15px}
::selection{background:var(--accent-050);color:var(--accent-600)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{
  outline:2px solid var(--accent-500);
  outline-offset:2px;
  border-radius:6px;
}

/* ============ 容器与通用 ============ */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 32px}}
.section{padding:64px 0}
@media (min-width:1024px){.section{padding:104px 0}}
.section-tight{padding:52px 0}
@media (min-width:1024px){.section-tight{padding:76px 0}}
.section-head{max-width:740px;margin-bottom:36px}
.section-head h2{
  font-size:clamp(24px,2.6vw,34px);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.4;
  margin:0;
  padding-left:16px;
  position:relative;
  color:var(--ink-900);
}
.section-head h2::before{
  content:"";
  position:absolute;left:0;top:.2em;width:4px;height:.82em;
  background:var(--accent-500);border-radius:2px;
}
.section-head p{margin:14px 0 0;color:var(--muted);font-size:16px;line-height:1.8}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.08em;
  color:var(--accent-600);background:var(--accent-050);
  border-radius:999px;padding:6px 14px;
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;
  border-radius:var(--radius-btn);
  padding:12px 20px;
  font-size:15px;font-weight:600;line-height:1.2;
  text-decoration:none;cursor:pointer;
  transition:background-color .2s ease-out,color .2s ease-out,border-color .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out;
}
.btn .arrow{transition:transform .2s ease-out}
.btn:hover .arrow{transform:translateX(4px)}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--accent-500);color:#fff}
.btn-primary:hover{background:var(--accent-600);color:#fff}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink-900)}
.btn-ghost:hover{border-color:var(--ink-500);color:var(--accent-600)}
.btn-light{background:transparent;border-color:rgba(255,255,255,.35);color:#fff}
.btn-light:hover{background:#fff;color:var(--ink-900);border-color:#fff}
.btn-block{width:100%}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid var(--line);
  box-shadow:var(--shadow-1);
}
.nav-inner{display:flex;align-items:center;gap:14px;height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink-900);flex:none}
.brand-mark{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:10px;background:var(--ink-900);flex:none}
.brand-text{font-size:16px;font-weight:800;letter-spacing:-.02em;white-space:nowrap}
.nav-main{display:flex;align-items:center;gap:2px;margin-left:10px}
.nav-link{
  position:relative;display:inline-block;
  padding:8px 12px;border-radius:999px;
  color:var(--muted);font-size:15px;text-decoration:none;
  transition:color .18s ease-out,background-color .18s ease-out;
}
.nav-link:hover{color:var(--ink-900);background:#F2F4F9}
.nav-link.is-active{color:var(--accent-600);background:var(--accent-050);font-weight:600}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.search-box{
  display:flex;align-items:center;gap:8px;
  height:40px;padding:0 14px;
  border-radius:999px;background:#F2F4F9;
  border:1px solid transparent;
  transition:background-color .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
.search-box svg{flex:none;color:var(--muted)}
.search-box input{border:0;background:transparent;outline:none;width:118px;color:var(--text)}
.search-box input::placeholder{color:#98A0BC}
.search-box:focus-within{background:#fff;border-color:var(--accent-500);box-shadow:0 0 0 3px rgba(255,90,31,.12)}
.btn-nav{padding:10px 18px;font-size:14px}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:10px;
  background:#F2F4F9;border:1px solid transparent;color:var(--ink-900);cursor:pointer;
  transition:background-color .18s ease-out,border-color .18s ease-out;
}
.nav-toggle:hover{background:#fff;border-color:var(--line)}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-900);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink-900);border-radius:2px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

@media (max-width:1023px){
  .nav-main,.search-box,.btn-nav{display:none}
  .nav-toggle{display:inline-flex}
  .nav-inner{height:56px}
  .brand-text{font-size:15px}
}
.mobile-drawer{
  position:fixed;inset:0;z-index:70;background:#fff;
  display:flex;flex-direction:column;
  transform:translateX(100%);visibility:hidden;
  transition:transform .22s ease-out,visibility .22s ease-out;
}
.mobile-drawer.is-open{transform:translateX(0);visibility:visible}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;border-bottom:1px solid var(--line)}
.drawer-close{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;
  color:var(--ink-900);font-size:20px;line-height:1;cursor:pointer;
}
.drawer-nav{display:flex;flex-direction:column;padding:14px 20px;gap:4px;overflow-y:auto;flex:1}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 12px;border-radius:10px;text-decoration:none;
  color:var(--ink-900);font-size:16px;font-weight:600;
  border-bottom:1px solid var(--line);
}
.drawer-nav a.is-active{color:var(--accent-600);background:var(--accent-050);border-bottom-color:transparent}
.drawer-foot{padding:16px 20px calc(20px + env(safe-area-inset-bottom));border-top:1px solid var(--line)}

/* ============ 面包屑 ============ */
.breadcrumb{padding:18px 0 0}
.breadcrumb ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:#C2C8DA}
.breadcrumb a{color:var(--muted);text-decoration:none}
.breadcrumb a:hover{color:var(--accent-600);text-decoration:underline;text-underline-offset:3px}
.breadcrumb [aria-current="page"]{color:var(--ink-900);font-weight:600}

/* ============ Hero ============ */
.hero{position:relative;background:var(--bg);padding:34px 0 60px;overflow:hidden}
@media (min-width:1024px){.hero{padding:52px 0 88px}}
.hero-dots{
  position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(11,16,38,.55) 1px,transparent 1px);
  background-size:24px 24px;opacity:.05;
  animation:breathe 6s ease-in-out infinite;
}
.hero-grid{position:relative;display:grid;gap:36px;grid-template-columns:1fr;align-items:center}
@media (min-width:1024px){.hero-grid{grid-template-columns:1.05fr .95fr;gap:56px}}
.hero-title{
  font-size:clamp(28px,3.6vw,42px);
  font-weight:800;letter-spacing:-.02em;line-height:1.35;
  margin:18px 0 16px;color:var(--ink-900);
}
.hero-lead{margin:0;font-size:17px;line-height:1.85;color:var(--muted);max-width:560px}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-stats{display:flex;flex-wrap:wrap;gap:22px;margin-top:34px}
.stat{display:flex;flex-direction:column;gap:2px;padding-left:14px;border-left:2px solid var(--line)}
.stat b{font-size:23px;font-weight:800;color:var(--ink-900);line-height:1.2;letter-spacing:-.01em}
.stat span{font-size:13px;color:var(--muted)}
.stat-accent b{color:var(--accent-500)}
.hero-media{position:relative;border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-2);background:var(--ink-900)}
.hero-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/11}
@media (min-width:1024px){.hero-media img{aspect-ratio:4/3}}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(11,16,38,.5) 0%,rgba(11,16,38,.12) 45%,rgba(11,16,38,0) 75%);
}
.hero-media figcaption{
  position:absolute;left:18px;bottom:16px;z-index:2;
  color:#fff;font-size:13px;letter-spacing:.02em;
}

/* ============ 快速定位卡片 ============ */
.grid-3{display:grid;gap:20px;grid-template-columns:1fr}
@media (min-width:768px){.grid-3{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.grid-3{grid-template-columns:repeat(3,1fr)}}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--shadow-1);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--ink-100)}
.card-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;
  background:var(--accent-050);color:var(--accent-600);
  font-weight:800;font-size:14px;margin-bottom:16px;
}
.card h3{font-size:19px;font-weight:700;margin:0 0 10px;color:var(--ink-900);letter-spacing:-.01em}
.card p{margin:0;color:var(--muted);font-size:15px;line-height:1.8}
.card .tag-line{
  display:inline-block;margin-top:16px;padding-top:14px;border-top:1px solid var(--line);
  width:100%;font-size:13px;color:var(--ink-500);font-weight:600;
}
.card .tag-line em{font-style:normal;color:var(--mint-400);font-weight:800}

/* ============ 时间轴 ============ */
.timeline{position:relative;display:flex;flex-direction:column}
.tl-item{position:relative;padding:0 0 42px 54px}
@media (min-width:768px){.tl-item{padding:0 0 52px 68px}}
.tl-item::before{
  content:"";position:absolute;left:15px;top:30px;bottom:-4px;width:2px;background:var(--line);
}
@media (min-width:768px){.tl-item::before{left:17px}}
.tl-item:last-child{padding-bottom:0}
.tl-item:last-child::before{display:none}
.tl-dot{
  position:absolute;left:4px;top:4px;width:24px;height:24px;border-radius:50%;
  background:#fff;border:2px solid var(--accent-500);
  display:flex;align-items:center;justify-content:center;
}
@media (min-width:768px){.tl-dot{left:6px}}
.tl-dot i{display:block;width:8px;height:8px;border-radius:50%;background:var(--accent-500)}
.tl-num{font-size:13px;font-weight:800;letter-spacing:.1em;color:var(--accent-600)}
.tl-item h3{font-size:20px;font-weight:700;color:var(--ink-900);margin:6px 0 10px;letter-spacing:-.01em}
.tl-item p{margin:0;color:var(--muted);font-size:16px;line-height:1.85;max-width:680px}
.tl-figure{margin:18px 0 0;border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--line);max-width:520px;background:var(--ink-100)}
.tl-figure img{width:100%;height:210px;object-fit:cover;transition:transform .22s ease-out}
.tl-figure:hover img{transform:scale(1.03)}
.tl-figure figcaption{padding:10px 14px;font-size:13px;color:var(--muted);background:#fff;border-top:1px solid var(--line)}

/* ============ 现象清单 ============ */
.band-white{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.check-list{display:grid;gap:14px;grid-template-columns:1fr}
@media (min-width:768px){.check-list{grid-template-columns:repeat(2,1fr)}}
.check-item{
  display:flex;gap:14px;padding:18px 20px;border-radius:var(--radius-card);
  background:var(--bg);border:1px solid var(--line);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out,background-color .2s ease-out;
}
.check-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--ink-100);background:#fff}
.check-mark{
  flex:none;width:22px;height:22px;border-radius:50%;
  background:var(--accent-050);color:var(--accent-600);
  display:flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:800;margin-top:3px;
}
.check-item h4{margin:0 0 6px;font-size:16px;font-weight:700;color:var(--ink-900)}
.check-item p{margin:0;font-size:14px;line-height:1.75;color:var(--muted)}

/* ============ FAQ ============ */
.faq-wrap{max-width:860px}
.faq-list{border-top:1px solid var(--line)}
.faq{border-bottom:1px solid var(--line)}
.faq summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:22px 2px;font-size:17px;font-weight:600;color:var(--ink-900);
  transition:color .18s ease-out;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{color:var(--accent-600)}
.faq-sign{
  position:relative;flex:none;width:20px;height:20px;border-radius:50%;
  background:var(--accent-050);
}
.faq-sign::before,.faq-sign::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--accent-600);
  transform:translate(-50%,-50%);border-radius:2px;
}
.faq-sign::before{width:10px;height:2px}
.faq-sign::after{width:2px;height:10px;transition:transform .2s ease-out}
.faq[open] .faq-sign::after{transform:translate(-50%,-50%) scaleY(0)}
.faq-body{
  padding:0 0 24px 16px;margin:0 0 0 2px;
  border-left:1px solid var(--accent-500);
  color:var(--muted);font-size:15px;line-height:1.85;
  animation:fadeIn .22s ease-out;
}
@media (max-width:520px){
  .faq summary{font-size:15px;padding:18px 2px}
  .faq-body{font-size:14px}
}

/* ============ 反馈表单 ============ */
.form-layout{display:grid;gap:28px;grid-template-columns:1fr}
@media (min-width:1024px){.form-layout{grid-template-columns:.85fr 1.15fr;gap:48px;align-items:start}}
.form-side h2{
  font-size:clamp(24px,2.6vw,32px);font-weight:800;letter-spacing:-.02em;
  margin:0 0 14px;color:var(--ink-900);padding-left:16px;position:relative;
}
.form-side h2::before{content:"";position:absolute;left:0;top:.2em;width:4px;height:.82em;background:var(--accent-500);border-radius:2px}
.form-side p{margin:0 0 20px;color:var(--muted);line-height:1.85}
.mini-list{list-style:none;margin:0;padding:0}
.mini-list li{position:relative;padding:10px 0 10px 22px;font-size:14px;color:var(--ink-500);border-top:1px solid var(--line)}
.mini-list li::before{
  content:"";position:absolute;left:0;top:19px;width:8px;height:8px;border-radius:2px;background:var(--mint-400);
}
.form-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--shadow-1);
}
@media (min-width:768px){.form-card{padding:32px}}
.form-grid{display:grid;gap:18px;grid-template-columns:1fr}
@media (min-width:640px){.form-grid{grid-template-columns:1fr 1fr}.form-grid .span-2{grid-column:1/-1}}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:8px;color:var(--ink-900)}
.field label em{font-style:normal;color:var(--accent-500)}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border-radius:10px;
  background:#F6F7FB;border:1px solid transparent;color:var(--text);
  outline:none;transition:background-color .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
.field textarea{min-height:118px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{
  background:#fff;border-color:var(--accent-500);box-shadow:0 0 0 3px rgba(255,90,31,.12);
}
.field .err{display:none;margin-top:6px;font-size:13px;color:#D64545}
.field.is-error input,.field.is-error select,.field.is-error textarea{border-color:#D64545;background:#fff}
.field.is-error .err{display:block}
.form-note{margin:14px 0 0;font-size:13px;color:var(--muted)}
.toast{
  display:none;margin-bottom:18px;padding:12px 16px;border-radius:10px;
  font-size:14px;background:var(--accent-050);color:var(--accent-600);
  border-left:3px solid var(--accent-500);
}
.toast.show{display:block;animation:fadeIn .22s ease-out}
.toast.is-error{background:#FDECEC;color:#B73030;border-left-color:#D64545}

/* ============ CTA 条 ============ */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--ink-900);border-radius:var(--radius-card);
  padding:40px 28px;color:#fff;
}
@media (min-width:1024px){.cta-band{padding:56px 48px}}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:22px 22px;opacity:.07;
  animation:breathe 6s ease-in-out infinite;
}
.cta-band-inner{position:relative;display:flex;flex-direction:column;gap:22px}
@media (min-width:1024px){
  .cta-band-inner{flex-direction:row;align-items:center;justify-content:space-between;gap:40px}
}
.cta-band h2{margin:0 0 10px;font-size:clamp(22px,2.4vw,30px);font-weight:800;letter-spacing:-.02em;color:#fff}
.cta-band p{margin:0;color:#B9C1DE;font-size:15px;line-height:1.8;max-width:640px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;flex:none}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;overflow:hidden;
  background:var(--ink-900);color:#C9CFE6;
  padding:60px 0 26px;border-top:1px solid rgba(255,255,255,.08);
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.55) 1px,transparent 1px);
  background-size:26px 26px;opacity:.045;
  animation:breathe 6s ease-in-out infinite;
}
.site-footer .container{position:relative;z-index:2}
.footer-top{display:grid;gap:34px;grid-template-columns:1fr}
@media (min-width:768px){.footer-top{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer-brand .brand-text{color:#fff;font-size:16px;font-weight:800;letter-spacing:-.02em}
.footer-brand .brand-mark{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1)}
.footer-desc{margin:14px 0 0;max-width:340px;font-size:14px;line-height:1.85;color:#98A1C2}
.footer-col h4{margin:0 0 14px;font-size:15px;font-weight:700;color:#fff}
.footer-col a{
  display:block;padding:6px 0;color:#C9CFE6;font-size:14px;text-decoration:none;
  transition:color .18s ease-out;
}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.footer-contact{list-style:none;margin:0;padding:0;font-size:14px;line-height:2;color:#A8B0CE}
.footer-contact strong{color:#fff;font-weight:600}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  margin-top:38px;padding-top:20px;
  border-top:1px solid rgba(255,255,255,.1);
  font-size:13px;color:#8A93B5;
}

/* ============ 固定转化条 ============ */
.convert-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:50;
  display:flex;align-items:center;gap:12px;
  padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  background:#fff;border-top:1px solid var(--line);
  box-shadow:0 -10px 28px -18px rgba(11,16,38,.35);
}
.convert-bar p{margin:0;flex:1;font-size:13px;line-height:1.5;color:var(--muted)}
.convert-bar .btn{flex:none;padding:10px 16px;font-size:14px}
.convert-close{display:none}
.convert-bar.is-hidden{display:none}
@media (min-width:1024px){
  .convert-bar{
    left:auto;right:24px;bottom:24px;width:296px;
    flex-direction:column;align-items:stretch;gap:12px;
    padding:18px;border:1px solid var(--line);border-radius:var(--radius-card);
    box-shadow:var(--shadow-2);
    transform:translateY(16px);opacity:0;pointer-events:none;
    transition:transform .22s ease-out,opacity .22s ease-out;
  }
  .convert-bar.is-visible{transform:none;opacity:1;pointer-events:auto}
  .convert-bar p{font-size:13px}
  .convert-close{
    display:flex;align-items:center;justify-content:center;
    position:absolute;top:8px;right:8px;width:26px;height:26px;
    border-radius:50%;border:1px solid var(--line);background:#fff;
    color:var(--muted);font-size:14px;line-height:1;cursor:pointer;
  }
  .convert-close:hover{color:var(--ink-900);border-color:var(--ink-100)}
}
@media (max-width:1023px){
  body{padding-bottom:74px}
}

/* ============ 动效 ============ */
@keyframes breathe{0%,100%{opacity:.05}50%{opacity:.13}}
@keyframes fadeIn{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease-out,transform .5s ease-out}
.reveal.is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}