/* roulang page: index */
/* ================= 1. 设计变量 ================= */
:root{
  --c-ink:#0E1714;
  --c-muted:#6B7671;
  --c-border:#E2DFD5;
  --c-brand:#0F3028;
  --c-brand-600:#17453A;
  --c-brand-300:#2E5B4E;
  --c-accent:#C7F24A;
  --c-accent-2:#E4693B;
  --c-bg:#F6F5F0;
  --c-surface:#FFFFFF;
  --c-surface-2:#EDEBE3;
  --ff-sans:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --ff-num:"Inter","Space Grotesk",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --r-card:14px;
  --r-btn:10px;
  --r-img:14px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(14,23,20,.04);
  --sh-2:0 12px 32px -12px rgba(14,23,20,.14);
  --ease:cubic-bezier(.22,1,.36,1);
  --side-w:264px;
}

/* ================= 2. 基础重置 ================= */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-ink);
  font-family:var(--ff-sans);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;padding:0;}
ul,ol{list-style:none;}
img{max-width:100%;height:auto;display:block;}
a{color:var(--c-brand);text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--c-brand-300);}
button{font-family:inherit;font-size:inherit;border:0;background:none;cursor:pointer;}
input,textarea,select{font-family:inherit;font-size:inherit;}
:focus-visible{outline:3px solid rgba(199,242,74,.6);outline-offset:2px;}

h1{font-size:clamp(2rem,3.4vw,3rem);line-height:1.15;letter-spacing:-.02em;font-weight:700;}
h2{font-size:clamp(1.5rem,2.3vw,2.1rem);line-height:1.25;letter-spacing:-.02em;font-weight:700;}
h3{font-size:1.25rem;line-height:1.4;letter-spacing:-.01em;font-weight:600;}
p{line-height:1.8;}

/* ================= 3. 容器与板块 ================= */
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 32px;}
.section{padding:104px 0;position:relative;}
.section--tight{padding-top:0;}
.section--alt{background:var(--c-surface);}
@media (max-width:1023px){
  .container{padding:0 24px;}
  .section{padding:76px 0;}
}
@media (max-width:640px){
  .container{padding:0 18px;}
  .section{padding:56px 0;}
}

.sec-head{max-width:720px;margin-bottom:52px;}
.sec-head h2{margin-bottom:16px;}
.sec-desc{color:var(--c-muted);font-size:1rem;max-width:660px;}
.eyebrow{
  display:inline-block;
  font-family:var(--ff-num);
  font-size:.75rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--c-brand-600);
  background:var(--c-surface-2);
  border-radius:var(--r-pill);
  padding:6px 14px;
  margin-bottom:20px;
}

/* ================= 4. 侧边导航（App Shell） ================= */
.side-nav{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--side-w);
  background:var(--c-brand);
  background-image:radial-gradient(rgba(199,242,74,.10) 1px,transparent 1px);
  background-size:20px 20px;
  color:#fff;
  padding:26px 18px;
  display:flex;
  flex-direction:column;
  z-index:80;
  overflow-y:auto;
  transition:width .28s var(--ease),transform .32s var(--ease);
}
.side-brand{display:flex;align-items:center;gap:12px;margin-bottom:34px;min-width:0;}
.logo-mark{
  flex:0 0 42px;
  width:42px;height:42px;
  border-radius:12px;
  background:var(--c-accent);
  color:var(--c-brand);
  font-family:var(--ff-num);
  font-weight:800;
  font-size:19px;
  letter-spacing:-.03em;
  display:flex;align-items:center;justify-content:center;
}
.logo-text{
  font-size:15px;
  font-weight:600;
  line-height:1.3;
  color:#fff;
  letter-spacing:.01em;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.side-menu{display:flex;flex-direction:column;gap:6px;margin-bottom:auto;}
.nav-link{
  position:relative;
  display:flex;
  align-items:center;
  gap:12px;
  padding:12px 14px;
  border-radius:10px;
  color:rgba(255,255,255,.72);
  font-size:14.5px;
  line-height:1.4;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.nav-link::before{
  content:"";
  position:absolute;
  left:0;top:50%;
  width:3px;height:20px;
  border-radius:2px;
  background:var(--c-accent);
  transform:translateY(-50%) scaleY(0);
  transition:transform .18s var(--ease);
}
.nav-link i{width:18px;text-align:center;font-size:15px;flex:0 0 18px;}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.06);}
.nav-link:hover::before{transform:translateY(-50%) scaleY(1);}
.nav-link.is-active{color:#fff;background:rgba(255,255,255,.06);}
.nav-link.is-active::before{transform:translateY(-50%) scaleY(1);}
.side-foot{margin-top:28px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);}
.side-foot .side-note{
  font-size:.8125rem;
  line-height:1.7;
  color:rgba(255,255,255,.6);
  margin-top:14px;
}
.side-foot .side-note span{font-family:var(--ff-num);color:var(--c-accent);}
.collapse-btn{
  display:flex;align-items:center;gap:8px;
  margin-top:16px;
  font-size:.8125rem;
  color:rgba(255,255,255,.55);
  transition:color .18s var(--ease);
}
.collapse-btn:hover{color:var(--c-accent);}

.site-main{margin-left:var(--side-w);min-height:100vh;transition:margin-left .28s var(--ease);}

/* 折叠态（≥1280 手动折叠） */
body.is-collapsed .side-nav{width:84px;padding:26px 12px;align-items:center;}
body.is-collapsed .site-main{margin-left:84px;}
body.is-collapsed .logo-text,
body.is-collapsed .nav-label,
body.is-collapsed .side-foot{display:none;}
body.is-collapsed .nav-link{justify-content:center;padding:12px;}
body.is-collapsed .side-brand{margin-bottom:28px;}

/* 平板：图标栏 */
@media (max-width:1279px){
  .side-nav{width:84px;padding:26px 12px;align-items:center;}
  .site-main{margin-left:84px;}
  .logo-text,.nav-label,.side-foot{display:none;}
  .nav-link{justify-content:center;padding:12px;}
  .side-brand{margin-bottom:28px;}
  .collapse-btn{display:none;}
}

/* 移动端：抽屉 */
.mobile-bar{
  display:none;
  position:sticky;top:0;z-index:70;
  height:64px;
  background:var(--c-brand);
  color:#fff;
  align-items:center;
  justify-content:space-between;
  padding:0 18px;
}
.mobile-bar .brand-mini{display:flex;align-items:center;gap:10px;color:#fff;}
.mobile-bar .logo-mark{width:34px;height:34px;flex:0 0 34px;font-size:16px;border-radius:10px;}
.mobile-bar .logo-text{font-size:14px;color:#fff;}
.menu-btn{
  width:42px;height:42px;border-radius:10px;
  color:#fff;font-size:18px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.08);
}
.drawer-mask{
  position:fixed;inset:0;
  background:rgba(14,23,20,.5);
  opacity:0;visibility:hidden;
  transition:opacity .28s var(--ease),visibility .28s var(--ease);
  z-index:75;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}

@media (max-width:1023px){
  .mobile-bar{display:flex;}
  .side-nav{
    width:280px;
    padding:26px 18px;
    align-items:stretch;
    transform:translateX(-100%);
    box-shadow:0 24px 60px -20px rgba(14,23,20,.5);
  }
  .side-nav.is-open{transform:translateX(0);}
  .logo-text,.nav-label,.side-foot{display:block;}
  .nav-link{justify-content:flex-start;padding:12px 14px;}
  .side-brand{align-items:center;margin-bottom:30px;}
  .site-main{margin-left:0;}
}

/* ================= 5. 按钮 / 标签 / 徽章 ================= */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;
  border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1.2;
  border:1px solid transparent;
  cursor:pointer;
  text-align:center;
  transition:background .18s var(--ease),color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.btn-accent{background:var(--c-accent);color:var(--c-brand);}
.btn-accent:hover{background:#bce53f;color:var(--c-brand);transform:translateY(-1px);box-shadow:0 8px 20px -8px rgba(15,48,40,.35);}
.btn-accent:active{transform:translateY(0);box-shadow:none;}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.28);}
.btn-ghost:hover{background:rgba(255,255,255,.1);color:#fff;transform:translateY(-1px);}
.btn-light{background:var(--c-surface);color:var(--c-ink);border-color:var(--c-border);}
.btn-light:hover{color:var(--c-ink);border-color:var(--c-brand-300);transform:translateY(-1px);box-shadow:var(--sh-1);}
.btn-block{width:100%;}

.link-arrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:15px;font-weight:600;
  color:var(--c-brand);
  position:relative;
}
.hero .link-arrow{color:#fff;}
.hero .link-arrow:hover{color:var(--c-accent);}
.link-arrow i{transition:transform .18s var(--ease);}
.link-arrow:hover i{transform:translateX(4px);}

.tag{
  display:inline-flex;align-items:center;
  height:26px;padding:0 12px;
  border-radius:var(--r-pill);
  background:var(--c-surface-2);
  color:var(--c-brand);
  font-size:.75rem;font-weight:600;letter-spacing:.02em;
}
.tag--lime{background:rgba(199,242,74,.16);color:var(--c-accent);}
.tag--outline{background:transparent;border:1px solid var(--c-border);color:var(--c-muted);}

/* ================= 6. Hero ================= */
.hero{
  position:relative;
  min-height:620px;
  display:flex;align-items:center;
  background:var(--c-brand);
  overflow:hidden;
}
.hero-bg{
  position:absolute;inset:0;
  background-size:cover;
  background-position:center;
}
.hero-overlay{
  position:absolute;inset:0;
  background:linear-gradient(96deg,rgba(15,48,40,.95) 0%,rgba(15,48,40,.88) 40%,rgba(15,48,40,.34) 100%);
}
.hero-inner{
  position:relative;z-index:2;
  padding-top:88px;padding-bottom:88px;
}
.hero-content{max-width:760px;}
.hero .eyebrow{background:rgba(199,242,74,.16);color:var(--c-accent);}
.hero h1{color:#fff;margin-bottom:20px;max-width:14em;}
.hero-sub{
  color:rgba(255,255,255,.78);
  font-size:1.0625rem;
  line-height:1.7;
  margin-bottom:34px;
  max-width:32em;
}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:22px;margin-bottom:56px;}
.hero-metrics{
  display:flex;flex-wrap:wrap;gap:48px;
  padding-top:30px;
  border-top:1px solid rgba(255,255,255,.16);
}
.hero-metrics li{display:flex;flex-direction:column;gap:4px;min-width:96px;}
.hero-metrics .num{
  font-family:var(--ff-num);
  font-size:2rem;font-weight:800;line-height:1;
  letter-spacing:-.03em;
  color:var(--c-accent);
}
.hero-metrics .lbl{font-size:.8125rem;color:rgba(255,255,255,.66);letter-spacing:.02em;}

@media (max-width:1023px){
  .hero{min-height:520px;}
  .hero-inner{padding-top:64px;padding-bottom:64px;}
  .hero-overlay{background:linear-gradient(96deg,rgba(15,48,40,.94) 0%,rgba(15,48,40,.88) 70%,rgba(15,48,40,.78) 100%);}
  .hero-metrics{gap:32px;}
}
@media (max-width:640px){
  .hero{min-height:auto;}
  .hero-inner{padding-top:52px;padding-bottom:52px;}
  .hero h1{font-size:1.75rem;}
  .hero-sub{font-size:1rem;}
  .hero-actions{gap:16px;margin-bottom:40px;}
  .hero-actions .btn{width:100%;}
  .hero-metrics{gap:24px;justify-content:space-between;}
  .hero-metrics li{min-width:0;flex:1 1 40%;}
  .hero-metrics .num{font-size:1.5rem;}
}

/* ================= 7. 痛点段 ================= */
.pain-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:44px 48px;
}
.pain-item{padding-top:26px;border-top:1px solid var(--c-border);}
.pain-no{
  display:block;
  font-family:var(--ff-num);
  font-size:clamp(2rem,3vw,2.6rem);
  font-weight:800;
  line-height:1;
  letter-spacing:-.03em;
  color:var(--c-accent-2);
  opacity:.85;
  margin-bottom:16px;
}
.pain-item h3{margin-bottom:10px;}
.pain-item p{color:var(--c-muted);font-size:.9375rem;max-width:34em;}
@media (max-width:767px){
  .pain-grid{grid-template-columns:1fr;gap:32px;}
}

/* ================= 8. 图文交替 ================= */
.feature-row{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:56px;
  align-items:center;
}
.feature-row + .feature-row{margin-top:88px;}
.feature-row.is-reverse .feature-text{grid-column:2;}
.feature-row.is-reverse .feature-media{grid-column:1;grid-row:1;}
.feature-text h3{margin:18px 0 16px;font-size:1.375rem;}
.feature-text p{color:var(--c-muted);margin-bottom:14px;max-width:34em;}
.feature-media{
  border-radius:var(--r-img);
  overflow:hidden;
  background:var(--c-surface-2);
  border:1px solid var(--c-border);
  box-shadow:var(--sh-1);
}
.feature-media img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  transition:transform .56s var(--ease);
}
.feature-media:hover img{transform:scale(1.03);}
.check-list{margin-top:22px;display:flex;flex-direction:column;gap:12px;}
.check-list li{
  position:relative;
  padding-left:26px;
  font-size:.9375rem;
  color:var(--c-ink);
}
.check-list li::before{
  content:"";
  position:absolute;left:0;top:.62em;
  width:9px;height:9px;
  border-radius:2px;
  background:var(--c-accent);
}
@media (max-width:900px){
  .feature-row,
  .feature-row.is-reverse{grid-template-columns:1fr;gap:28px;}
  .feature-row.is-reverse .feature-text{grid-column:1;}
  .feature-row.is-reverse .feature-media{grid-column:1;grid-row:auto;}
  .feature-row + .feature-row{margin-top:56px;}
}

/* ================= 9. 深色数据带 ================= */
.dark-band{
  background:var(--c-brand);
  background-image:radial-gradient(rgba(199,242,74,.08) 1px,transparent 1px);
  background-size:22px 22px;
  color:#fff;
}
.dark-band h2{color:#fff;margin-bottom:14px;}
.dark-band .sec-desc{color:rgba(255,255,255,.66);}
.stat-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:28px;
  margin-bottom:48px;
}
.stat{
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.12);
  border-radius:var(--r-card);
  padding:28px 24px;
  transition:border-color .18s var(--ease),transform .18s var(--ease),background .18s var(--ease);
}
.stat:hover{border-color:rgba(199,242,74,.45);transform:translateY(-2px);background:rgba(255,255,255,.06);}
.stat-num{
  display:block;
  font-family:var(--ff-num);
  font-size:clamp(2.2rem,3.4vw,2.9rem);
  font-weight:800;
  line-height:1;
  letter-spacing:-.03em;
  color:var(--c-accent);
}
.stat-unit{
  display:inline-block;
  font-size:.8125rem;
  color:rgba(255,255,255,.6);
  margin-top:8px;
}
.stat p{font-size:.9375rem;color:rgba(255,255,255,.78);margin-top:6px;}
.band-foot{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
  padding-top:34px;
  border-top:1px solid rgba(255,255,255,.14);
}
.band-foot p{color:rgba(255,255,255,.68);font-size:.9375rem;max-width:38em;}
@media (max-width:900px){
  .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;}
}
@media (max-width:520px){
  .stat-grid{grid-template-columns:1fr;}
  .stat{padding:22px 20px;}
  .band-foot .btn{width:100%;}
}

/* ================= 10. 证言卡 ================= */
.quote-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:28px;
}
.quote-card{
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  padding:32px 28px;
  display:flex;flex-direction:column;
  transition:border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.quote-card:hover{border-color:var(--c-brand-300);transform:translateY(-2px);box-shadow:var(--sh-2);}
.quote-mark{
  font-family:var(--ff-num);
  font-size:2.6rem;line-height:1;font-weight:800;
  color:var(--c-accent);
  margin-bottom:14px;
}
.quote-card blockquote{font-size:.9375rem;color:var(--c-ink);margin-bottom:24px;flex:1;}
.quote-meta{font-size:.8125rem;color:var(--c-muted);letter-spacing:.01em;}
@media (max-width:900px){
  .quote-grid{grid-template-columns:1fr;}
}

/* ================= 11. 资讯列表（CMS 区） ================= */
.list-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  margin-bottom:44px;
}
.post-card{
  display:flex;flex-direction:column;
  height:100%;
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  overflow:hidden;
  transition:border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.post-card:hover{border-color:var(--c-brand-300);transform:translateY(-2px);box-shadow:var(--sh-2);}
.post-cover{
  position:relative;
  background:var(--c-surface-2);
  border-bottom:1px solid var(--c-border);
  overflow:hidden;
}
.post-cover img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  transition:transform .56s var(--ease);
}
.post-card:hover .post-cover img{transform:scale(1.03);}
.post-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1;gap:12px;}
.post-body h3{
  font-size:1.0625rem;
  line-height:1.5;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  color:var(--c-ink);
}
.post-card:hover .post-body h3{color:var(--c-brand-600);}
.post-body p{
  font-size:.875rem;
  color:var(--c-muted);
  line-height:1.7;
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
  flex:1;
}
.post-meta{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding-top:14px;
  border-top:1px solid var(--c-border);
  font-size:.8125rem;
  color:var(--c-muted);
  font-family:var(--ff-num);
}
.post-meta .more{display:inline-flex;align-items:center;gap:6px;color:var(--c-brand);font-family:var(--ff-sans);font-weight:600;}
.post-meta .more i{transition:transform .18s var(--ease);}
.post-card:hover .post-meta .more i{transform:translateX(4px);}
.empty-state{
  text-align:center;
  padding:64px 24px;
  border:1px dashed var(--c-border);
  border-radius:var(--r-card);
  background:var(--c-surface);
}
.empty-state i{font-size:2rem;color:var(--c-brand-300);margin-bottom:16px;display:block;}
.empty-state p{color:var(--c-muted);margin-bottom:20px;}

/* ================= 12. FAQ ================= */
.accordion{border:0;background:transparent;}
.accordion .accordion-item{
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  background:var(--c-surface);
  margin-bottom:14px;
  overflow:hidden;
}
.accordion .accordion-title{
  font-size:1rem;
  font-weight:600;
  color:var(--c-ink);
  padding:22px 56px 22px 24px;
  border:0;
  position:relative;
  transition:color .18s var(--ease),background .18s var(--ease);
}
.accordion .accordion-title::before{
  content:"\f067";
  font-family:"Font Awesome 6 Free";
  font-weight:900;
  position:absolute;
  right:24px;top:50%;
  transform:translateY(-50%);
  font-size:.8125rem;
  color:var(--c-brand-300);
  transition:transform .24s var(--ease),color .24s var(--ease);
}
.accordion .accordion-title[aria-expanded="true"]::before{
  content:"\f068";
  color:var(--c-brand);
}
.accordion .accordion-title:hover{color:var(--c-brand-600);background:var(--c-surface-2);}
.accordion .accordion-content{
  border:0;
  padding:0 24px 24px;
  background:transparent;
  color:var(--c-muted);
  font-size:.9375rem;
  transition:height .24s var(--ease);
}
.accordion .accordion-content p{margin:0;}
@media (max-width:640px){
  .accordion .accordion-title{padding:18px 48px 18px 18px;font-size:.9375rem;}
  .accordion .accordion-title::before{right:18px;}
  .accordion .accordion-content{padding:0 18px 20px;}
}

/* ================= 13. 结尾 CTA ================= */
.cta-band{
  background:var(--c-accent);
  color:var(--c-brand);
  padding:88px 0;
}
.cta-grid{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:56px;
  align-items:start;
}
.cta-band h2{color:var(--c-brand);margin-bottom:16px;}
.cta-band .eyebrow{background:rgba(15,48,40,.1);color:var(--c-brand);}
.cta-band p.lead{color:rgba(15,48,40,.78);max-width:34em;margin-bottom:26px;}
.cta-points{display:flex;flex-direction:column;gap:12px;}
.cta-points li{
  position:relative;padding-left:24px;
  font-size:.9375rem;color:rgba(15,48,40,.86);
}
.cta-points li::before{
  content:"";position:absolute;left:0;top:.62em;
  width:9px;height:9px;border-radius:2px;background:var(--c-brand);
}
.cta-form{
  background:var(--c-surface);
  border-radius:var(--r-card);
  padding:32px 28px;
  box-shadow:var(--sh-2);
}
.field{margin-bottom:18px;}
.field label{
  display:block;
  font-size:.8125rem;
  font-weight:600;
  color:var(--c-ink);
  margin-bottom:8px;
  letter-spacing:.02em;
}
.field input,
.field textarea{
  width:100%;
  min-height:46px;
  padding:11px 14px;
  border:1px solid var(--c-border);
  border-radius:var(--r-btn);
  background:var(--c-surface);
  color:var(--c-ink);
  font-size:.9375rem;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.field textarea{min-height:104px;resize:vertical;line-height:1.7;}
.field input::placeholder,
.field textarea::placeholder{color:#A6AFA9;}
.field input:focus,
.field textarea:focus{
  outline:none;
  border-color:var(--c-accent);
  box-shadow:0 0 0 3px rgba(199,242,74,.35);
}
.form-note{font-size:.8125rem;color:var(--c-muted);margin-top:14px;}
.form-note.is-ok{color:var(--c-brand-600);font-weight:600;}
@media (max-width:900px){
  .cta-band{padding:64px 0;}
  .cta-grid{grid-template-columns:1fr;gap:34px;}
}

/* ================= 14. 页脚 ================= */
.site-footer{
  background:var(--c-brand);
  background-image:radial-gradient(rgba(199,242,74,.08) 1px,transparent 1px);
  background-size:22px 22px;
  color:rgba(255,255,255,.72);
  padding:72px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.1fr;
  gap:40px;
  padding-bottom:52px;
}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:18px;}
.footer-brand .logo-mark{flex:0 0 40px;width:40px;height:40px;font-size:18px;}
.footer-brand .logo-text{color:#fff;font-size:15px;font-weight:600;}
.footer-about{font-size:.875rem;line-height:1.8;color:rgba(255,255,255,.66);max-width:30em;}
.footer-col h4{
  color:#fff;
  font-size:.875rem;
  font-weight:600;
  letter-spacing:.06em;
  margin-bottom:18px;
}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{
  color:rgba(255,255,255,.72);
  font-size:.875rem;
  transition:color .18s var(--ease),padding-left .18s var(--ease);
}
.footer-col a:hover{color:var(--c-accent);padding-left:4px;}
.footer-col li span{font-size:.875rem;font-family:var(--ff-num);color:rgba(255,255,255,.72);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0 28px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  font-size:.8125rem;
  color:rgba(255,255,255,.5);
}
@media (max-width:1023px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:34px;}
}
@media (max-width:520px){
  .site-footer{padding-top:52px;}
  .footer-grid{grid-template-columns:1fr;gap:30px;padding-bottom:36px;}
}

/* ================= 15. 返回顶部 / 动效 ================= */
.to-top{
  position:fixed;
  right:28px;bottom:28px;
  width:44px;height:44px;
  border-radius:50%;
  background:var(--c-brand);
  color:var(--c-accent);
  display:flex;align-items:center;justify-content:center;
  font-size:15px;
  box-shadow:var(--sh-2);
  opacity:0;visibility:hidden;
  transition:opacity .28s var(--ease),visibility .28s var(--ease),transform .18s var(--ease);
  z-index:60;
}
.to-top.is-show{opacity:1;visibility:visible;}
.to-top:hover{transform:translateY(-2px);}
@media (max-width:1023px){
  .to-top{right:18px;bottom:18px;}
}

.reveal{opacity:0;transform:translateY(14px);transition:opacity .56s var(--ease),transform .56s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;transition:none;}
  *{transition-duration:.01ms !important;animation-duration:.01ms !important;}
}

/* roulang page: article */
:root{
  --c-ink:#0E1714;
  --c-muted:#6B7671;
  --c-border:#E2DFD5;
  --c-brand:#0F3028;
  --c-brand-600:#17453A;
  --c-brand-300:#2E5B4E;
  --c-accent:#C7F24A;
  --c-accent-2:#E4693B;
  --c-bg:#F6F5F0;
  --c-surface:#FFFFFF;
  --c-surface-2:#EDEBE3;
  --ff-sans:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --ff-num:"Inter","Space Grotesk",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --r-card:14px;
  --r-btn:10px;
  --r-img:16px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(14,23,20,.04);
  --sh-2:0 12px 32px -12px rgba(14,23,20,.14);
  --ease:cubic-bezier(.22,1,.36,1);
  --t-1:180ms;
  --t-2:320ms;
  --sidebar-w:264px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-ink);
  font-family:var(--ff-sans);
  font-size:1rem;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--c-brand-600);text-decoration:none;transition:color var(--t-1) var(--ease),border-color var(--t-1) var(--ease);}
a:hover{color:var(--c-brand);}
h1,h2,h3,h4{margin:0;letter-spacing:-.02em;line-height:1.25;font-weight:700;color:var(--c-ink);}
p{margin:0;}
ul,ol{margin:0;padding:0;}
button,input,textarea,select{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
:focus-visible{outline:3px solid rgba(199,242,74,.9);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 32px;}

/* ---------- 侧栏 App Shell ---------- */
.side-nav{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  background-color:var(--c-brand);
  background-image:radial-gradient(rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:18px 18px;
  color:#fff;
  display:flex;
  flex-direction:column;
  gap:28px;
  padding:26px 20px;
  z-index:60;
  transition:transform var(--t-2) var(--ease),width var(--t-2) var(--ease);
}
.brand{display:flex;align-items:center;gap:12px;color:#fff;text-decoration:none;}
.brand:hover{color:#fff;}
.logo-mark{
  width:40px;height:40px;flex:0 0 40px;
  display:grid;place-items:center;
  border-radius:12px;
  background:var(--c-accent);
  color:var(--c-brand);
  font-family:var(--ff-num);
  font-size:1.125rem;
  font-weight:700;
  letter-spacing:0;
}
.logo-text{font-size:1rem;font-weight:600;letter-spacing:-.02em;white-space:nowrap;}
.side-menu{display:flex;flex-direction:column;gap:6px;}
.nav-link{
  position:relative;
  display:flex;align-items:center;gap:12px;
  padding:11px 14px;
  border-radius:10px;
  color:rgba(255,255,255,.76);
  font-size:.9375rem;
  transition:background var(--t-1) var(--ease),color var(--t-1) var(--ease);
}
.nav-link i{width:18px;text-align:center;font-size:.9375rem;opacity:.9;}
.nav-link::before{
  content:"";
  position:absolute;left:0;top:50%;
  width:3px;height:22px;
  border-radius:2px;
  background:var(--c-accent);
  transform:translateY(-50%) scaleY(.2);
  opacity:0;
  transition:opacity var(--t-1) var(--ease),transform var(--t-1) var(--ease);
}
.nav-link:hover{background:rgba(255,255,255,.07);color:#fff;}
.nav-link:hover::before{opacity:1;transform:translateY(-50%) scaleY(1);}
.nav-link.is-active{background:rgba(255,255,255,.08);color:#fff;}
.nav-link.is-active::before{opacity:1;transform:translateY(-50%) scaleY(1);}
.side-cta{margin-top:auto;border-top:1px solid rgba(255,255,255,.14);padding-top:20px;}
.side-cta .btn{width:100%;justify-content:center;}
.side-cta p{margin-top:12px;font-size:.8125rem;line-height:1.7;color:rgba(255,255,255,.6);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;
  border-radius:var(--r-btn);
  font-weight:600;
  font-size:.9375rem;
  border:1px solid transparent;
  transition:background var(--t-1) var(--ease),transform var(--t-1) var(--ease),box-shadow var(--t-1) var(--ease),border-color var(--t-1) var(--ease),color var(--t-1) var(--ease);
}
.btn-primary{background:var(--c-accent);color:var(--c-brand);}
.btn-primary:hover{background:#b9e838;color:var(--c-brand);transform:translateY(-1px);box-shadow:0 8px 20px -8px rgba(15,48,40,.35);}
.btn-primary:active{transform:translateY(0);box-shadow:none;}
.btn-ghost{background:var(--c-surface);border-color:var(--c-border);color:var(--c-brand);}
.btn-ghost:hover{border-color:var(--c-brand-300);background:var(--c-surface-2);color:var(--c-brand);transform:translateY(-1px);}
.btn-dark{background:var(--c-brand);color:#fff;}
.btn-dark:hover{background:var(--c-brand-600);color:#fff;transform:translateY(-1px);}
.btn-sm{padding:10px 18px;font-size:.875rem;}

/* ---------- 主区域 ---------- */
.main-wrap{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column;transition:margin var(--t-2) var(--ease);}
.topbar{display:none;}
.page-main{flex:1 1 auto;}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:26px 0 0;
  font-size:.8125rem;
  color:var(--c-muted);
}
.breadcrumb a{color:var(--c-muted);}
.breadcrumb a:hover{color:var(--c-brand);text-decoration:underline;text-underline-offset:3px;}
.breadcrumb .sep{color:#B9B4A6;}
.breadcrumb .current{color:var(--c-ink);font-weight:600;}

/* ---------- 文章头 ---------- */
.article-head{padding:22px 0 30px;max-width:860px;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 12px;
  border-radius:var(--r-pill);
  background:var(--c-surface-2);
  color:var(--c-brand);
  font-size:.75rem;
  font-weight:600;
  letter-spacing:.04em;
}
.article-head h1{
  margin:18px 0 16px;
  font-size:clamp(1.75rem,3.2vw,2.75rem);
  line-height:1.18;
}
.meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:.8125rem;
  color:var(--c-muted);
  font-family:var(--ff-num);
}
.meta .dot{color:#C6C1B3;}
.meta .src{font-family:var(--ff-sans);}
.lead{
  margin-top:22px;
  padding-left:16px;
  border-left:3px solid var(--c-accent);
  color:var(--c-brand-600);
  font-size:.9375rem;
  line-height:1.8;
}

/* ---------- 头图 ---------- */
.hero-figure{margin:6px 0 40px;}
.hero-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-img);background:var(--c-surface-2);}
.hero-figure figcaption{margin-top:10px;font-size:.8125rem;color:var(--c-muted);text-align:center;}

/* ---------- 文章布局 ---------- */
.article-layout{display:grid;grid-template-columns:minmax(0,760px) 220px;gap:56px;align-items:start;padding-bottom:72px;}
.article-main{min-width:0;}
.article-aside{position:sticky;top:32px;display:none;}
.article-aside.is-ready{display:block;}
.toc{
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  background:var(--c-surface);
  padding:20px 20px 22px;
  box-shadow:var(--sh-1);
}
.toc h4{font-size:.8125rem;letter-spacing:.14em;text-transform:uppercase;color:var(--c-muted);font-weight:700;margin-bottom:12px;}
.toc ul{list-style:none;}
.toc li{margin:0;}
.toc a{
  display:block;
  padding:6px 0;
  font-size:.875rem;
  color:var(--c-muted);
  border-left:2px solid transparent;
  padding-left:12px;
  transition:color var(--t-1) var(--ease),border-color var(--t-1) var(--ease);
}
.toc a:hover{color:var(--c-brand);}
.toc a.is-current{color:var(--c-brand);border-left-color:var(--c-accent);font-weight:600;}
.toc .toc-sub a{padding-left:26px;font-size:.8125rem;}

/* ---------- 正文排版 ---------- */
.article-body{max-width:760px;font-size:1.0625rem;line-height:1.85;color:#1B2620;overflow-wrap:break-word;}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:1.25em 0 0;}
.article-body h2{
  font-size:1.5rem;line-height:1.3;
  margin:2.4em 0 .8em;
  padding-bottom:.4em;
  border-bottom:1px solid var(--c-border);
}
.article-body h3{font-size:1.25rem;line-height:1.4;margin:1.9em 0 .6em;}
.article-body h4{font-size:1.0625rem;margin:1.6em 0 .5em;}
.article-body ul,.article-body ol{padding-left:1.4em;margin:1.15em 0 0;}
.article-body li{margin:.45em 0;}
.article-body ul li::marker{color:var(--c-brand-300);}
.article-body ol li::marker{color:var(--c-brand-600);font-family:var(--ff-num);font-weight:600;}
.article-body blockquote{
  margin:1.6em 0;
  padding:18px 22px;
  border-left:3px solid var(--c-accent);
  background:var(--c-surface-2);
  border-radius:0 12px 12px 0;
  color:var(--c-brand);
}
.article-body blockquote p{margin:0;}
.article-body a{color:var(--c-brand-600);border-bottom:1px solid var(--c-accent);}
.article-body a:hover{color:var(--c-brand);border-bottom-color:var(--c-brand-300);}
.article-body img{border-radius:var(--r-img);margin:1.6em 0;background:var(--c-surface-2);}
.article-body strong{color:var(--c-brand);}
.article-body hr{border:0;border-top:1px solid var(--c-border);margin:2.4em 0;}
.article-body table{width:100%;border-collapse:collapse;font-size:.9375rem;margin:1.6em 0;display:block;overflow-x:auto;}
.article-body th,.article-body td{border:1px solid var(--c-border);padding:11px 14px;text-align:left;}
.article-body thead th{background:var(--c-surface-2);color:var(--c-brand);}
.article-body tbody tr:nth-child(even){background:#FAF9F5;}
.article-body code{
  font-family:var(--ff-num);
  background:var(--c-surface-2);
  border-radius:6px;
  padding:2px 6px;
  font-size:.9em;
}

/* ---------- 空态 ---------- */
.empty-state{
  border:1px solid var(--c-border);
  background:var(--c-surface);
  border-radius:var(--r-card);
  padding:56px 32px;
  text-align:center;
  box-shadow:var(--sh-1);
}
.empty-state .ico{
  width:64px;height:64px;margin:0 auto 18px;
  border-radius:18px;
  background:var(--c-surface-2);
  display:grid;place-items:center;
  color:var(--c-brand-300);
  font-size:1.5rem;
}
.empty-state h2{font-size:1.25rem;margin-bottom:10px;}
.empty-state p{color:var(--c-muted);font-size:.9375rem;max-width:520px;margin:0 auto 22px;}

/* ---------- 文章底部 ---------- */
.article-foot{
  margin-top:48px;
  padding-top:26px;
  border-top:1px solid var(--c-border);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
}
.tags{display:flex;flex-wrap:wrap;gap:8px;}
.tag{
  display:inline-flex;align-items:center;
  height:26px;padding:0 12px;
  border-radius:var(--r-pill);
  background:var(--c-surface-2);
  color:var(--c-brand);
  font-size:.75rem;
  font-weight:600;
}
.back-links{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- 相关阅读提示条 ---------- */
.note-strip{
  margin-top:44px;
  display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;
  border:1px solid var(--c-border);
  border-left:4px solid var(--c-accent);
  border-radius:12px;
  background:var(--c-surface);
  padding:20px 24px;
  box-shadow:var(--sh-1);
}
.note-strip p{font-size:.9375rem;color:var(--c-brand-600);}

/* ---------- CTA ---------- */
.cta-band{background:var(--c-accent);color:var(--c-brand);padding:72px 0;}
.cta-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:start;}
.cta-band h2{font-size:clamp(1.5rem,2.4vw,2.1rem);color:var(--c-brand);}
.cta-band p.copy{margin-top:14px;font-size:1rem;line-height:1.8;color:rgba(15,48,40,.85);max-width:460px;}
.cta-points{margin-top:22px;display:flex;flex-direction:column;gap:10px;}
.cta-points span{display:flex;align-items:center;gap:10px;font-size:.9375rem;font-weight:600;}
.cta-points i{color:var(--c-brand-600);}
.lead-form{
  background:var(--c-surface);
  border-radius:var(--r-card);
  padding:26px;
  box-shadow:var(--sh-2);
  border:1px solid rgba(15,48,40,.08);
}
.field{margin-bottom:16px;}
.field label{display:block;font-size:.8125rem;font-weight:600;margin-bottom:6px;color:var(--c-brand);}
.field input,.field textarea{
  width:100%;
  min-height:46px;
  padding:11px 14px;
  border:1px solid var(--c-border);
  border-radius:10px;
  background:#FCFBF7;
  font-size:.9375rem;
  transition:border-color var(--t-1) var(--ease),box-shadow var(--t-1) var(--ease);
}
.field textarea{min-height:96px;resize:vertical;}
.field input:focus,.field textarea:focus{
  outline:none;
  border-color:var(--c-accent);
  box-shadow:0 0 0 3px rgba(199,242,74,.35);
}
.lead-form .btn{width:100%;}
.form-hint{margin-top:12px;font-size:.8125rem;color:var(--c-muted);line-height:1.7;}

/* ---------- FAQ ---------- */
.faq-section{padding:88px 0;}
.section-head{max-width:640px;margin-bottom:32px;}
.section-head .eyebrow{
  display:inline-block;
  font-family:var(--ff-num);
  font-size:.75rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--c-brand-300);
  margin-bottom:12px;
}
.section-head h2{font-size:clamp(1.5rem,2.3vw,2.1rem);}
.section-head p{margin-top:12px;color:var(--c-muted);font-size:.9375rem;}
.faq-list{max-width:860px;}
.accordion{border:0;background:transparent;margin:0;}
.accordion .accordion-item{
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  background:var(--c-surface);
  margin-bottom:12px;
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:border-color var(--t-1) var(--ease);
}
.accordion .accordion-item:hover{border-color:var(--c-brand-300);}
.accordion .accordion-title{
  display:flex;align-items:center;gap:12px;
  padding:18px 22px;
  border:0;
  color:var(--c-ink);
  font-size:1rem;
  font-weight:600;
  line-height:1.5;
  background:transparent;
  transition:background var(--t-1) var(--ease);
}
.accordion .accordion-title::before{
  content:"";
  width:8px;height:8px;flex:0 0 8px;
  background:var(--c-accent);
  border-radius:2px;
}
.accordion .accordion-title:hover{background:var(--c-surface-2);color:var(--c-brand);}
.accordion .accordion-content{
  border-top:1px solid var(--c-border);
  padding:18px 22px 20px;
  color:var(--c-muted);
  font-size:.9375rem;
  line-height:1.8;
  background:#FCFBF7;
}
.accordion .accordion-content p{margin:0;}
.accordion .is-active > .accordion-title{color:var(--c-brand);background:rgba(199,242,74,.14);}

/* ---------- 页脚 ---------- */
.site-footer{
  background-color:var(--c-brand);
  background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:18px 18px;
  color:rgba(255,255,255,.72);
  padding:72px 0 26px;
  margin-top:auto;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:12px;color:#fff;margin-bottom:16px;}
.footer-brand .logo-text{color:#fff;}
.footer-about{font-size:.875rem;line-height:1.8;max-width:340px;color:rgba(255,255,255,.68);}
.footer-col h4{font-size:.875rem;letter-spacing:.06em;color:#fff;margin-bottom:16px;}
.footer-col ul{list-style:none;}
.footer-col li{margin-bottom:10px;font-size:.875rem;}
.footer-col a{color:rgba(255,255,255,.72);}
.footer-col a:hover{color:var(--c-accent);}
.footer-col span{color:rgba(255,255,255,.68);}
.footer-bottom{
  margin-top:48px;
  padding-top:22px;
  border-top:1px solid rgba(255,255,255,.14);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:.8125rem;
  color:rgba(255,255,255,.6);
  font-family:var(--ff-num);
}
.footer-bottom span:last-child{font-family:var(--ff-num);letter-spacing:.06em;}

/* ---------- 遮罩 ---------- */
.drawer-mask{
  position:fixed;inset:0;
  background:rgba(14,23,20,.5);
  opacity:0;visibility:hidden;
  transition:opacity var(--t-2) var(--ease),visibility var(--t-2) var(--ease);
  z-index:55;
}
.drawer-mask.is-on{opacity:1;visibility:visible;}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity var(--t-2) var(--ease),transform var(--t-2) var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- 1024–1279 收缩侧栏 ---------- */
@media (max-width:1279px){
  :root{--sidebar-w:84px;}
  .side-nav{padding:22px 14px;align-items:center;}
  .logo-text,.nav-label,.side-cta p{display:none;}
  .side-menu{width:100%;align-items:center;}
  .nav-link{justify-content:center;padding:12px;width:52px;position:relative;}
  .nav-link i{font-size:1.0625rem;width:auto;}
  .nav-link:hover::after{
    content:attr(data-tip);
    position:absolute;left:60px;top:50%;transform:translateY(-50%);
    background:var(--c-ink);color:#fff;
    font-size:.75rem;line-height:1;
    padding:8px 10px;border-radius:8px;white-space:nowrap;z-index:70;
  }
  .side-cta{width:100%;display:flex;justify-content:center;}
  .side-cta .btn{padding:12px;width:52px;font-size:0;}
  .side-cta .btn i{font-size:1.0625rem;}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0;}
  .article-aside{display:none !important;}
}

/* ---------- <1024 移动端 ---------- */
@media (max-width:1023px){
  :root{--sidebar-w:280px;}
  .topbar{
    display:flex;align-items:center;justify-content:space-between;
    height:64px;
    padding:0 18px;
    background:var(--c-brand);
    position:sticky;top:0;z-index:50;
    box-shadow:0 2px 10px rgba(14,23,20,.18);
  }
  .topbar .brand{color:#fff;gap:10px;}
  .topbar .logo-mark{width:34px;height:34px;flex:0 0 34px;font-size:1rem;border-radius:10px;}
  .topbar .logo-text{font-size:.9375rem;}
  .hamburger{
    width:42px;height:42px;
    display:grid;place-items:center;
    border-radius:10px;
    color:#fff;font-size:1.125rem;
    background:rgba(255,255,255,.08);
    transition:background var(--t-1) var(--ease);
  }
  .hamburger:hover{background:rgba(255,255,255,.16);}
  .side-nav{
    width:280px;
    padding:24px 20px;
    align-items:flex-start;
    transform:translateX(-100%);
  }
  .side-nav.is-open{transform:translateX(0);box-shadow:0 0 40px rgba(0,0,0,.35);}
  .logo-text,.nav-label,.side-cta p{display:block;}
  .side-menu{width:100%;align-items:stretch;}
  .nav-link{justify-content:flex-start;width:auto;padding:11px 14px;font-size:.9375rem;}
  .nav-link:hover::after{content:none;}
  .side-cta{width:100%;}
  .side-cta .btn{padding:14px 22px;width:100%;font-size:.9375rem;}
  .side-cta .btn i{font-size:1rem;}
  .main-wrap{margin-left:0;}
  .container{padding:0 20px;}
  .breadcrumb{padding-top:20px;}
  .article-head{padding:16px 0 24px;}
  .hero-figure{margin-bottom:32px;}
  .article-layout{padding-bottom:56px;}
  .cta-grid{grid-template-columns:1fr;gap:32px;}
  .cta-band{padding:56px 0;}
  .faq-section{padding:64px 0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .footer-about{max-width:none;}
  .footer-bottom{margin-top:36px;}
}

@media (max-width:640px){
  .container{padding:0 16px;}
  .meta{gap:8px;font-size:.75rem;}
  .article-body{font-size:1rem;}
  .article-body h2{font-size:1.3125rem;}
  .article-body h3{font-size:1.125rem;}
  .footer-grid{grid-template-columns:1fr;}
  .cta-band{padding:48px 0;}
  .lead-form{padding:20px;}
  .article-foot{flex-direction:column;align-items:flex-start;}
  .empty-state{padding:40px 20px;}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category1 */
/* ============ 设计变量 ============ */
:root{
  --c-ink:#0E1714;
  --c-muted:#6B7671;
  --c-border:#E2DFD5;
  --c-brand:#0F3028;
  --c-brand-600:#17453A;
  --c-brand-300:#2E5B4E;
  --c-accent:#C7F24A;
  --c-accent-2:#E4693B;
  --c-bg:#F6F5F0;
  --c-surface:#FFFFFF;
  --c-surface-2:#EDEBE3;
  --ff-sans:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --ff-num:"Inter","Space Grotesk",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --r-card:14px;
  --r-btn:10px;
  --r-img:16px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(14,23,20,.04);
  --sh-2:0 12px 32px -12px rgba(14,23,20,.14);
  --ease:cubic-bezier(.22,1,.36,1);
  --side-w:264px;
}

/* ============ 基础 ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--ff-sans);
  font-size:1rem;
  line-height:1.8;
  color:var(--c-ink);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.02em;line-height:1.25}
h1{font-size:clamp(2rem,3.4vw,3rem);line-height:1.15}
h2{font-size:clamp(1.5rem,2.3vw,2.1rem)}
h3{font-size:1.25rem;line-height:1.4}
p{margin:0 0 1.25em}
button{font-family:inherit}
:focus-visible{outline:3px solid rgba(199,242,74,.9);outline-offset:2px;border-radius:4px}
::selection{background:var(--c-accent);color:var(--c-brand)}
section[id]{scroll-margin-top:92px}

.skip-link{position:absolute;left:-9999px;top:0;z-index:200;background:var(--c-accent);color:var(--c-brand);padding:12px 20px;border-radius:0 0 10px 0;font-weight:600}
.skip-link:focus{left:0}

/* ============ 容器 ============ */
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}
.grid-container{max-width:1180px;padding-left:24px;padding-right:24px}

/* ============ 侧边导航 ============ */
.side-shell{
  position:fixed;top:0;left:0;bottom:0;width:var(--side-w);
  background:var(--c-brand);
  display:flex;flex-direction:column;
  z-index:90;
  border-right:1px solid rgba(255,255,255,.07);
  transition:width .32s var(--ease),transform .32s var(--ease);
  overflow-y:auto;
  overscroll-behavior:contain;
}
.side-shell::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.10) 1px,transparent 1px);
  background-size:22px 22px;opacity:.4;pointer-events:none;
}
.side-head{
  position:relative;z-index:1;
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:22px 20px 18px;
}
.brand{display:flex;align-items:center;gap:12px;color:#fff;min-width:0}
.logo-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;flex:0 0 auto;border-radius:10px;
  background:var(--c-accent);color:var(--c-brand);
  font-family:var(--ff-num);font-weight:800;font-size:1.125rem;
}
.brand-text{font-weight:700;font-size:1rem;letter-spacing:-.01em;white-space:nowrap;overflow:hidden}
.side-collapse{
  display:inline-flex;align-items:center;justify-content:center;
  width:30px;height:30px;flex:0 0 auto;border-radius:8px;
  border:1px solid rgba(255,255,255,.18);background:transparent;
  color:rgba(255,255,255,.7);cursor:pointer;font-size:.75rem;
  transition:background-color .18s var(--ease),color .18s var(--ease);
}
.side-collapse:hover{background:rgba(255,255,255,.1);color:#fff}

.side-menu{position:relative;z-index:1;display:flex;flex-direction:column;padding:6px 0;gap:2px}
.nav-link{
  position:relative;display:flex;align-items:center;gap:14px;
  padding:13px 20px;color:rgba(255,255,255,.72);
  font-size:.9375rem;line-height:1.5;
  transition:background-color .18s var(--ease),color .18s var(--ease);
}
.nav-link i{width:18px;text-align:center;font-size:.95rem;flex:0 0 auto}
.nav-link::before{
  content:"";position:absolute;left:0;top:50%;
  width:3px;height:22px;border-radius:0 3px 3px 0;
  background:var(--c-accent);
  transform:translateY(-50%) scaleY(0);
  transition:transform .22s var(--ease);
}
.nav-link:hover{background:rgba(255,255,255,.06);color:#fff}
.nav-link:hover::before{transform:translateY(-50%) scaleY(1)}
.nav-link.is-active{background:rgba(255,255,255,.08);color:#fff}
.nav-link.is-active::before{transform:translateY(-50%) scaleY(1)}

.side-foot{position:relative;z-index:1;margin-top:auto;padding:20px;border-top:1px solid rgba(255,255,255,.1)}
.side-note{margin:12px 0 0;font-size:.8125rem;color:rgba(255,255,255,.55);line-height:1.6}

/* ============ 移动端顶栏与抽屉遮罩 ============ */
.mobile-topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:64px;
  align-items:center;justify-content:space-between;
  padding:0 16px;background:var(--c-brand);color:#fff;z-index:100;
  box-shadow:0 6px 20px -12px rgba(14,23,20,.5);
}
.menu-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:10px;border:1px solid rgba(255,255,255,.2);
  background:transparent;color:#fff;font-size:1.05rem;cursor:pointer;
  transition:background-color .18s var(--ease),border-color .18s var(--ease);
}
.menu-toggle:hover{background:rgba(255,255,255,.1);border-color:rgba(199,242,74,.6)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(14,23,20,.5);
  opacity:0;visibility:hidden;transition:opacity .3s var(--ease),visibility .3s var(--ease);
  z-index:85;
}

/* ============ 主内容 ============ */
.site-main{margin-left:var(--side-w);transition:margin-left .32s var(--ease);min-height:100vh}

/* ============ 按钮与链接 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:var(--r-btn);
  font-size:.9375rem;font-weight:600;line-height:1.2;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.btn-primary{background:var(--c-accent);color:var(--c-brand)}
.btn-primary:hover{background:#bde43a;transform:translateY(-1px);box-shadow:0 8px 20px -8px rgba(15,48,40,.45)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:transparent;color:var(--c-ink);border-color:var(--c-border)}
.btn-ghost:hover{border-color:var(--c-brand-300);transform:translateY(-1px)}
.btn-ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.28)}
.btn-ghost-light:hover{border-color:rgba(199,242,74,.85);transform:translateY(-1px)}
.btn-block{width:100%}

.text-link{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.9375rem;font-weight:600;color:var(--c-brand);
  position:relative;padding-bottom:3px;
}
.text-link::after{
  content:"";position:absolute;left:0;bottom:0;width:0;height:2px;
  background:var(--c-accent);transition:width .32s var(--ease);
}
.text-link:hover::after{width:100%}
.text-link i{font-size:.75rem;transition:transform .22s var(--ease)}
.text-link:hover i{transform:translateX(3px)}

/* ============ 标签与徽章 ============ */
.eyebrow{
  display:inline-block;margin-bottom:16px;
  font-family:var(--ff-num);font-size:.75rem;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;color:var(--c-brand-300);
}
.badge{
  display:inline-flex;align-items:center;
  height:25px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--c-surface-2);color:var(--c-brand);
  font-size:.75rem;font-weight:600;letter-spacing:.02em;
}
.badge-dark{background:rgba(199,242,74,.16);color:var(--c-accent)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin:0}
.tag-row li{
  padding:5px 12px;border-radius:var(--r-pill);
  border:1px solid var(--c-border);background:var(--c-surface);
  font-size:.8125rem;color:var(--c-muted);
}
.dot-list{margin:0 0 6px;display:grid;gap:10px}
.dot-list li{position:relative;padding-left:20px;color:var(--c-ink);font-size:.9375rem}
.dot-list li::before{
  content:"";position:absolute;left:0;top:.72em;
  width:8px;height:8px;border-radius:2px;background:var(--c-accent);
}

/* ============ 页面首屏 ============ */
.page-hero{
  position:relative;overflow:hidden;
  padding:76px 0 66px;
  color:#fff;
  background-image:
    linear-gradient(100deg,rgba(15,48,40,.95) 0%,rgba(15,48,40,.86) 44%,rgba(15,48,40,.44) 100%),
    url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center;
}
.page-hero .dot-grid{
  position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.16) 1px,transparent 1px);
  background-size:24px 24px;opacity:.5;
}
.hero-inner{position:relative;z-index:1}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:.8125rem;color:rgba(255,255,255,.62)}
.crumb li+li::before{content:"/";margin-right:10px;color:rgba(255,255,255,.35)}
.crumb a:hover{color:var(--c-accent)}
.crumb [aria-current]{color:#fff}
.page-hero h1{margin:20px 0 18px;max-width:20em}
.page-hero h1::after{
  content:"";display:block;width:64px;height:4px;border-radius:2px;
  background:var(--c-accent);margin-top:22px;
}
.hero-sub{max-width:32em;font-size:1.0625rem;color:rgba(255,255,255,.82);margin-bottom:30px}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:22px}
.page-hero .text-link{color:#fff}
.hero-metrics{display:flex;flex-wrap:wrap;gap:36px;margin-top:44px;padding-top:28px;border-top:1px solid rgba(255,255,255,.16)}
.hero-metrics li{display:flex;flex-direction:column;gap:4px}
.m-num{font-family:var(--ff-num);font-size:1.5rem;font-weight:700;color:var(--c-accent);line-height:1}
.m-txt{font-size:.8125rem;color:rgba(255,255,255,.72)}

/* ============ 锚点条 ============ */
.anchor-bar{
  position:sticky;top:0;z-index:50;
  background:rgba(246,245,240,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--c-border);
}
.anchor-scroll{display:flex;gap:8px;overflow-x:auto;padding:14px 0;scrollbar-width:none}
.anchor-scroll::-webkit-scrollbar{display:none}
.chip{
  flex:0 0 auto;padding:8px 16px;border-radius:var(--r-pill);
  border:1px solid var(--c-border);background:var(--c-surface);
  font-size:.875rem;color:var(--c-muted);white-space:nowrap;
  transition:border-color .18s var(--ease),color .18s var(--ease),background-color .18s var(--ease);
}
.chip:hover{border-color:var(--c-brand-300);color:var(--c-brand);background:var(--c-surface-2)}

/* ============ 板块 ============ */
.section{padding:96px 0}
.section-alt{background:var(--c-surface)}
.section-head{max-width:760px;margin-bottom:48px}
.section-head h2{margin-bottom:16px}
.section-lead{color:var(--c-muted);font-size:1rem;margin:0}
.split h2{max-width:12em}
.split .cell:last-child p{color:var(--c-muted)}
.split .cell:last-child p:first-child{color:var(--c-ink)}

/* ============ 长条列表 ============ */
.bar-list{border-top:1px solid var(--c-border)}
.bar-item{
  display:grid;grid-template-columns:88px 1fr 40px;
  align-items:center;gap:20px;
  padding:26px 20px;border-bottom:1px solid var(--c-border);
  transition:background-color .2s var(--ease);
}
.bar-item:hover{background:var(--c-surface-2)}
.bar-num{
  font-family:var(--ff-num);font-size:1.75rem;font-weight:700;
  color:var(--c-brand);line-height:1;letter-spacing:.02em;
}
.bar-body h3{margin-bottom:6px;font-size:1.0625rem}
.bar-body p{margin:0;color:var(--c-muted);font-size:.9375rem;line-height:1.7}
.bar-arrow{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:50%;
  border:1px solid var(--c-border);color:var(--c-brand-300);
  font-size:.8rem;justify-self:end;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.bar-item:hover .bar-arrow{background:var(--c-accent);border-color:var(--c-accent);color:var(--c-brand);transform:translateX(3px)}

/* ============ 步骤轨 ============ */
.step-rail{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step{
  position:relative;background:var(--c-surface);
  border:1px solid var(--c-border);border-radius:var(--r-card);
  padding:32px 26px 28px;
  box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.step::before{content:"";position:absolute;top:-1px;left:26px;width:44px;height:3px;border-radius:0 0 3px 3px;background:var(--c-accent)}
.step:hover{transform:translateY(-2px);border-color:var(--c-brand-300);box-shadow:var(--sh-2)}
.step-idx{
  display:block;margin-bottom:16px;
  font-family:var(--ff-num);font-size:1.5rem;font-weight:700;
  color:var(--c-brand);line-height:1;
}
.step h3{margin-bottom:10px;font-size:1.0625rem}
.step p{margin:0;color:var(--c-muted);font-size:.9375rem;line-height:1.75}

/* ============ 异常卡 ============ */
.issue-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:24px;align-items:start}
.issue-side{display:grid;gap:24px}
.issue-card{
  background:var(--c-surface);border:1px solid var(--c-border);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.issue-card:hover{transform:translateY(-2px);border-color:var(--c-brand-300);box-shadow:var(--sh-2)}
.issue-media{overflow:hidden;background:var(--c-surface-2)}
.issue-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .56s var(--ease)}
.issue-card:hover .issue-media img{transform:scale(1.03)}
.issue-body{padding:26px}
.issue-body h3{margin:14px 0 10px}
.issue-body p{margin:0 0 18px;color:var(--c-muted);font-size:.9375rem}
.issue-side .issue-card{padding:26px}
.issue-side .issue-card h3{margin-bottom:10px;font-size:1.0625rem}
.issue-side .issue-card p{margin:0;color:var(--c-muted);font-size:.9375rem}

/* ============ 数据带 ============ */
.stats-band{position:relative;overflow:hidden;background:var(--c-brand);color:#fff;padding:88px 0}
.stats-band .dot-grid{
  position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.14) 1px,transparent 1px);
  background-size:20px 20px;opacity:.35;
}
.stats-band .grid-container{position:relative;z-index:1}
.on-dark .eyebrow{color:var(--c-accent)}
.on-dark h2{color:#fff}
.on-dark .section-lead{color:rgba(255,255,255,.7)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-bottom:48px}
.stat{
  padding:28px 24px;border-radius:var(--r-card);
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.12);
  transition:background-color .22s var(--ease),transform .22s var(--ease);
}
.stat:hover{background:rgba(255,255,255,.09);transform:translateY(-2px)}
.stat-line{display:flex;align-items:baseline;gap:6px;margin-bottom:14px}
.stat-num{font-family:var(--ff-num);font-size:clamp(2rem,3.4vw,2.75rem);font-weight:700;color:var(--c-accent);line-height:1}
.stat-unit{font-size:.875rem;color:rgba(255,255,255,.6)}
.stat p{margin:0;font-size:.9375rem;color:rgba(255,255,255,.72);line-height:1.7}
.stats-foot{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;padding-top:32px;border-top:1px solid rgba(255,255,255,.14)}
.stats-foot p{margin:0;max-width:44em;color:rgba(255,255,255,.76);font-size:.9375rem}

/* ============ 场景卡 ============ */
.scenario-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.scenario-card{
  padding:32px 28px;background:var(--c-surface);
  border:1px solid var(--c-border);border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.scenario-card:hover{transform:translateY(-2px);border-color:var(--c-brand-300);box-shadow:var(--sh-2)}
.scenario-card:nth-child(3){grid-column:1 / -1}
.scenario-num{
  display:inline-block;margin-bottom:16px;
  font-family:var(--ff-num);font-size:.8125rem;font-weight:600;
  letter-spacing:.14em;color:var(--c-brand-300);
}
.scenario-card h3{margin-bottom:10px;font-size:1.0625rem}
.scenario-card p{margin:0;color:var(--c-muted);font-size:.9375rem}

/* ============ FAQ ============ */
.faq-side h2{margin-bottom:14px}
.faq-side p{color:var(--c-muted);font-size:.9375rem}
.accordion{border:0;background:transparent;margin:0}
.accordion-item{
  border:1px solid var(--c-border);border-radius:var(--r-card);
  background:var(--c-surface);margin-bottom:12px;overflow:hidden;
  box-shadow:var(--sh-1);
  transition:border-color .22s var(--ease);
}
.accordion-item:hover{border-color:var(--c-brand-300)}
.accordion-title{
  position:relative;display:block;
  padding:20px 56px 20px 22px;border:0;
  font-size:1rem;font-weight:600;color:var(--c-ink);line-height:1.5;
  transition:background-color .18s var(--ease);
}
.accordion-title::before{
  content:"\f078";font-family:"Font Awesome 6 Free";font-weight:900;
  position:absolute;right:22px;top:50%;
  transform:translateY(-50%);
  font-size:.78rem;color:var(--c-brand-300);
  transition:transform .24s var(--ease);
}
.accordion-item.is-active .accordion-title::before{transform:translateY(-50%) rotate(180deg)}
.accordion-title:hover{background:var(--c-surface-2)}
.accordion-content{padding:0 22px 20px;border:0;background:transparent;color:var(--c-muted);font-size:.9375rem}
.accordion-content p:last-child{margin-bottom:0}

/* ============ CTA 区 ============ */
.cta-band{background:var(--c-accent);color:var(--c-brand);padding:80px 0}
.cta-band h2{margin-bottom:14px;max-width:14em}
.cta-band .cta-side p{color:rgba(15,48,40,.78);font-size:.9375rem;margin:0;max-width:26em}
.lead-form{display:grid;grid-template-columns:1fr 1fr;gap:16px 20px}
.field{display:flex;flex-direction:column;gap:8px}
.field-full{grid-column:1 / -1}
.field label{font-size:.8125rem;font-weight:600;color:var(--c-brand);letter-spacing:.02em}
.field input,.field textarea{
  width:100%;min-height:46px;padding:12px 14px;
  border-radius:var(--r-btn);border:1px solid rgba(15,48,40,.22);
  background:#fff;color:var(--c-ink);font-size:.9375rem;line-height:1.5;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.field textarea{min-height:96px;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:#98A19C}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--c-accent);
  box-shadow:0 0 0 3px rgba(199,242,74,.35);
}
.field input:invalid:not(:placeholder-shown){border-color:var(--c-accent-2)}
.form-note{display:block;margin-top:12px;font-size:.8125rem;color:rgba(15,48,40,.7);line-height:1.6}
.form-actions{display:flex;flex-wrap:wrap;align-items:center;gap:16px}
.cta-band .btn-primary{background:var(--c-brand);color:#fff}
.cta-band .btn-primary:hover{background:var(--c-brand-600);box-shadow:0 8px 20px -8px rgba(15,48,40,.6)}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;overflow:hidden;
  background:var(--c-brand);color:rgba(255,255,255,.72);
  padding-top:72px;
}
.site-footer::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.12) 1px,transparent 1px);
  background-size:22px 22px;opacity:.35;
}
.site-footer .container{position:relative;z-index:1}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:52px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand .logo-text{font-weight:700;font-size:1rem;color:#fff}
.footer-about{margin:0;font-size:.9375rem;line-height:1.75;color:rgba(255,255,255,.68)}
.footer-col h4{margin:0 0 16px;font-size:.9375rem;color:#fff;font-weight:600}
.footer-col li{margin-bottom:10px;font-size:.9375rem;line-height:1.6}
.footer-col a:hover{color:var(--c-accent)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding:20px 0 28px;border-top:1px solid rgba(255,255,255,.12);
  font-size:.8125rem;color:rgba(255,255,255,.6);
}

/* ============ 入场动效 ============ */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .56s var(--ease),transform .56s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width:1279px) and (min-width:1024px){
  body{--side-w:84px}
  .brand-text,.nav-label,.side-foot{display:none}
  .side-head{justify-content:center;padding:20px 0 16px}
  .side-collapse{display:none}
  .nav-link{justify-content:center;padding:15px 0}
  .nav-link::before{height:26px}
}
@media (min-width:1024px){
  body.is-collapsed{--side-w:84px}
  body.is-collapsed .brand-text,
  body.is-collapsed .nav-label,
  body.is-collapsed .side-foot{display:none}
  body.is-collapsed .side-head{justify-content:center;padding:20px 0 16px}
  body.is-collapsed .nav-link{justify-content:center;padding:15px 0}
}
@media (max-width:1023px){
  .mobile-topbar{display:flex}
  .side-shell{width:280px;transform:translateX(-100%);z-index:120}
  body.is-drawer-open .side-shell{transform:translateX(0)}
  body.is-drawer-open .drawer-mask{opacity:1;visibility:visible}
  .site-main{margin-left:0;padding-top:64px}
  .side-collapse{display:none}
  .anchor-bar{top:64px}
  .section{padding:64px 0}
  .stats-band,.cta-band{padding:64px 0}
}
@media (max-width:900px){
  .issue-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .step-rail{grid-template-columns:1fr}
  .scenario-grid{grid-template-columns:1fr}
  .scenario-card:nth-child(3){grid-column:auto}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px}
}
@media (max-width:640px){
  .grid-container,.container{padding-left:18px;padding-right:18px}
  .section{padding:56px 0}
  .page-hero{padding:56px 0 48px}
  .hero-metrics{gap:24px}
  .section-head{margin-bottom:32px}
  .bar-item{grid-template-columns:60px 1fr;gap:14px;padding:22px 8px}
  .bar-arrow{display:none}
  .bar-num{font-size:1.375rem}
  .lead-form{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .stats-foot{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
}

/* roulang page: category2 */
:root{
  --c-ink:#0E1714;
  --c-muted:#6B7671;
  --c-border:#E2DFD5;
  --c-brand:#0F3028;
  --c-brand-600:#17453A;
  --c-brand-300:#2E5B4E;
  --c-accent:#C7F24A;
  --c-accent-2:#E4693B;
  --c-bg:#F6F5F0;
  --c-surface:#FFFFFF;
  --c-surface-2:#EDEBE3;
  --ff-sans:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --ff-num:"Inter","Space Grotesk",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --r-card:14px;
  --r-btn:10px;
  --r-img:16px;
  --sh-1:0 1px 2px rgba(14,23,20,.04);
  --sh-2:0 12px 32px -12px rgba(14,23,20,.14);
  --ease:cubic-bezier(.22,1,.36,1);
  --side-w:264px;
  --topbar-h:64px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--ff-sans);
  font-size:1rem;
  line-height:1.8;
  color:var(--c-ink);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--c-brand-600);text-decoration:none}
a:hover{color:var(--c-brand)}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-0.02em;line-height:1.25}
p{margin:0 0 1.25em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
strong{font-weight:700}
:focus-visible{outline:3px solid rgba(199,242,74,.9);outline-offset:2px;border-radius:6px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--c-accent);color:var(--c-brand);padding:12px 18px;border-radius:0 0 10px 0;z-index:200}
.skip-link:focus{left:0}

/* ============ 布局容器 ============ */
.container{width:100%;max-width:1180px;margin:0 auto;padding-left:24px;padding-right:24px}
.container.narrow{max-width:760px;text-align:center}

/* ============ 顶部移动端条 ============ */
.topbar{display:none}

/* ============ 左侧固定导航 ============ */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--side-w);
  background:var(--c-brand);
  color:#fff;
  display:flex;flex-direction:column;
  padding:28px 18px 24px;
  z-index:70;
  overflow-y:auto;
  transition:transform .32s var(--ease);
}
.side-logo{display:flex;align-items:center;gap:12px;color:#fff;margin-bottom:34px;padding:0 6px}
.logo-mark{
  width:42px;height:42px;flex:0 0 42px;border-radius:12px;
  background:var(--c-accent);color:var(--c-brand);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--ff-num);font-size:1.35rem;font-weight:700;letter-spacing:0;
}
.logo-text{font-size:1.02rem;font-weight:700;letter-spacing:.01em;white-space:nowrap}
.side-menu{display:flex;flex-direction:column;gap:6px}
.nav-link{
  position:relative;display:flex;align-items:center;gap:12px;
  padding:12px 14px;border-radius:10px;
  color:rgba(255,255,255,.72);font-size:.95rem;
  transition:background .22s var(--ease),color .22s var(--ease);
}
.nav-link i{width:20px;text-align:center;font-size:.95rem;flex:0 0 20px}
.nav-link::before{
  content:"";position:absolute;left:0;top:50%;width:3px;height:20px;border-radius:2px;
  background:var(--c-accent);transform:translateY(-50%) scaleY(0);transform-origin:center;
  transition:transform .22s var(--ease);
}
.nav-link:hover{background:rgba(255,255,255,.06);color:#fff}
.nav-link:hover::before{transform:translateY(-50%) scaleY(1)}
.nav-link.is-active{background:rgba(255,255,255,.06);color:#fff}
.nav-link.is-active::before{transform:translateY(-50%) scaleY(1)}
.nav-label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.side-foot{margin-top:auto;padding-top:26px}
.side-cta{width:100%;justify-content:center;padding:13px 18px;font-size:.95rem}
.side-contact{
  margin-top:18px;padding:14px 16px;border-radius:12px;
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);
  font-size:.8125rem;color:rgba(255,255,255,.66);
}
.side-contact p{margin:0 0 4px}
.side-contact strong{display:block;font-family:var(--ff-num);color:var(--c-accent);font-size:.95rem;letter-spacing:.04em}
.drawer-mask{display:none}

/* ============ 主区域 ============ */
.site-main{margin-left:var(--side-w);display:block}
.site-footer{margin-left:var(--side-w)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:var(--r-btn);
  font-size:.98rem;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:background .22s var(--ease),color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.btn-primary{background:var(--c-accent);color:var(--c-brand)}
.btn-primary:hover{background:#b9e63c;color:var(--c-brand);transform:translateY(-1px);box-shadow:0 8px 20px -8px rgba(15,48,40,.35)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.28)}
.btn-ghost:hover{background:rgba(255,255,255,.1);color:#fff;transform:translateY(-1px)}
.btn-outline{background:var(--c-surface);color:var(--c-brand);border-color:var(--c-border)}
.btn-outline:hover{border-color:var(--c-brand-300);color:var(--c-brand);transform:translateY(-1px);box-shadow:var(--sh-1)}
.btn-dark{background:var(--c-brand);color:#fff}
.btn-dark:hover{background:var(--c-brand-600);color:#fff;transform:translateY(-1px)}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  background:var(--c-surface-2);color:var(--c-brand);
  font-size:.75rem;letter-spacing:.02em;margin-bottom:14px;
}
.badge-dark{background:rgba(199,242,74,.16);color:var(--c-accent)}
.eyebrow{
  font-family:var(--ff-num);font-size:.8125rem;letter-spacing:.14em;
  color:var(--c-brand-300);text-transform:uppercase;margin:0 0 14px;
}
.eyebrow-light{color:var(--c-accent)}

/* ============ Hero ============ */
.page-hero{
  position:relative;overflow:hidden;
  background:var(--c-brand);color:#fff;
  padding:112px 0 84px;text-align:center;
}
.hero-media{position:absolute;inset:0;z-index:0}
.hero-media img{width:100%;height:100%;object-fit:cover;opacity:.5}
.page-hero::after{
  content:"";position:absolute;inset:0;z-index:1;
  background:
    radial-gradient(rgba(255,255,255,.06) 1px, transparent 1px) 0 0/18px 18px,
    linear-gradient(180deg,rgba(15,48,40,.86),rgba(15,48,40,.95));
}
.hero-inner{position:relative;z-index:2;max-width:800px;margin:0 auto;text-align:center}
.breadcrumb{
  display:flex;justify-content:center;align-items:center;gap:10px;
  font-size:.8125rem;color:rgba(255,255,255,.66);margin-bottom:26px;
}
.breadcrumb a{color:rgba(255,255,255,.8);border-bottom:1px solid transparent;transition:border-color .22s var(--ease),color .22s var(--ease)}
.breadcrumb a:hover{color:var(--c-accent);border-bottom-color:var(--c-accent)}
.breadcrumb .current{color:#fff}
.page-hero h1{
  font-size:clamp(1.95rem,3.4vw,2.9rem);
  line-height:1.18;margin-bottom:18px;color:#fff;
}
.hero-sub{font-size:1.05rem;color:rgba(255,255,255,.78);margin-bottom:34px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-bottom:46px}
.hero-metrics{
  display:flex;flex-wrap:wrap;justify-content:center;gap:14px;
  border-top:1px solid rgba(255,255,255,.16);padding-top:26px;
}
.hero-metrics li{min-width:150px;text-align:center}
.hero-metrics strong{
  display:block;font-family:var(--ff-num);font-size:1.35rem;color:var(--c-accent);letter-spacing:.02em;
}
.hero-metrics span{font-size:.8125rem;color:rgba(255,255,255,.62)}

/* ============ 锚点条 ============ */
.anchor-bar{
  position:sticky;top:0;z-index:40;
  background:rgba(246,245,240,.94);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--c-border);
}
.anchor-inner{display:flex;gap:10px;overflow-x:auto;padding-top:12px;padding-bottom:12px;scrollbar-width:none}
.anchor-inner::-webkit-scrollbar{display:none}
.chip{
  flex:0 0 auto;padding:8px 16px;border-radius:999px;
  background:var(--c-surface);border:1px solid var(--c-border);
  color:var(--c-muted);font-size:.875rem;white-space:nowrap;
  transition:all .22s var(--ease);
}
.chip:hover{color:var(--c-brand);border-color:var(--c-brand-300)}
.chip.is-on{background:var(--c-brand);border-color:var(--c-brand);color:#fff}

/* ============ 板块 ============ */
.section{padding:96px 0}
.section-alt{background:var(--c-surface-2)}
.section-dark{background:var(--c-brand);color:#fff;position:relative;overflow:hidden}
.section-dark::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(rgba(255,255,255,.06) 1px, transparent 1px) 0 0/18px 18px;
  pointer-events:none;
}
.section-dark > .container{position:relative;z-index:1}
.section-head{max-width:720px;margin:0 auto 52px;text-align:center}
.section-head h2{font-size:clamp(1.5rem,2.3vw,2.1rem);margin-bottom:16px}
.section-head p{color:var(--c-muted);font-size:1rem}
.section-dark .section-head p{color:rgba(255,255,255,.72)}
.section-dark .section-head h2{color:#fff}

/* ============ 大图块 ============ */
.lead-block{max-width:760px;margin:0 auto 44px;text-align:center}
.lead-block h2{font-size:clamp(1.5rem,2.3vw,2.1rem);margin-bottom:18px}
.lead-block p{color:var(--c-muted)}
.big-media{
  margin:0;border-radius:var(--r-img);overflow:hidden;
  border:1px solid var(--c-border);background:var(--c-surface-2);
  box-shadow:var(--sh-2);
}
.big-media img{width:100%;aspect-ratio:16/9;object-fit:cover}
.big-media figcaption{
  padding:14px 22px;background:var(--c-surface);
  border-top:1px solid var(--c-border);
  font-size:.8125rem;color:var(--c-muted);text-align:center;
}

/* ============ 步骤长条列表 ============ */
.step-list{border-top:1px solid var(--c-border);max-width:960px;margin:0 auto}
.step-item{
  display:flex;align-items:center;gap:26px;
  padding:26px 18px;border-bottom:1px solid var(--c-border);
  transition:background .22s var(--ease),padding-left .22s var(--ease);
}
.step-item:hover{background:rgba(255,255,255,.72);padding-left:26px}
.step-num{
  font-family:var(--ff-num);font-size:1.5rem;font-weight:600;
  color:var(--c-brand-300);min-width:56px;letter-spacing:.02em;
}
.step-body{flex:1 1 auto;min-width:0}
.step-body h3{font-size:1.125rem;margin-bottom:6px}
.step-body p{margin:0;font-size:.9375rem;color:var(--c-muted);line-height:1.75}
.step-arrow{color:var(--c-border);font-size:.95rem;transition:color .22s var(--ease),transform .22s var(--ease)}
.step-item:hover .step-arrow{color:var(--c-accent-2);transform:translateX(4px)}

/* ============ 非对称瀑布卡片 ============ */
.masonry{
  display:grid;
  grid-template-columns:minmax(0,1.16fr) minmax(0,.84fr);
  gap:28px;align-items:start;
}
.m-col{display:grid;gap:28px;min-width:0}
.card{
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .32s var(--ease),box-shadow .32s var(--ease),border-color .32s var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--c-brand-300)}
.card-cover{overflow:hidden;background:var(--c-surface-2)}
.card-cover img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .56s var(--ease)}
.card:hover .card-cover img{transform:scale(1.03)}
.card-body{padding:24px}
.card-pad{padding:24px}
.card h3{font-size:1.25rem;margin-bottom:10px;line-height:1.4}
.card p{color:var(--c-muted);font-size:.9375rem;margin-bottom:14px;line-height:1.75}
.card p:last-child{margin-bottom:0}
.card-plain{background:var(--c-surface)}
.card-accent{
  background:linear-gradient(180deg,#fff,#FAFAF4);
  border-left:4px solid var(--c-accent);
}
.mini-list{margin-top:6px}
.mini-list li{
  position:relative;padding-left:18px;margin-bottom:9px;
  font-size:.9375rem;color:var(--c-muted);
}
.mini-list li:last-child{margin-bottom:0}
.mini-list li::before{
  content:"";position:absolute;left:0;top:.66em;
  width:7px;height:7px;border-radius:2px;background:var(--c-accent);
}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.9rem;font-weight:600;color:var(--c-brand);
  border-bottom:1px solid var(--c-brand-300);
  padding-bottom:2px;
  transition:gap .22s var(--ease),border-color .22s var(--ease);
}
.link-arrow:hover{gap:12px;border-bottom-color:var(--c-accent);color:var(--c-brand)}

/* ============ 流程时间轴 ============ */
.timeline{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}
.timeline li{
  background:var(--c-surface);border:1px solid var(--c-border);
  border-radius:var(--r-card);padding:28px 22px;
  box-shadow:var(--sh-1);
  transition:transform .32s var(--ease),border-color .32s var(--ease),box-shadow .32s var(--ease);
}
.timeline li:hover{transform:translateY(-2px);border-color:var(--c-brand-300);box-shadow:var(--sh-2)}
.t-num{
  display:block;font-family:var(--ff-num);font-size:1.7rem;
  color:var(--c-brand-300);margin-bottom:14px;letter-spacing:.03em;
}
.timeline h3{font-size:1.0625rem;margin-bottom:10px}
.timeline p{margin:0;font-size:.9rem;color:var(--c-muted);line-height:1.75}

/* ============ 数据带 ============ */
.databand{padding:88px 0}
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;margin-bottom:44px}
.stat{
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.14);
  border-radius:var(--r-card);padding:26px 22px;
}
.stat strong{
  display:block;font-family:var(--ff-num);font-size:2.1rem;line-height:1.15;
  color:var(--c-accent);letter-spacing:.01em;margin-bottom:8px;
}
.stat span{font-size:.875rem;color:rgba(255,255,255,.72)}
.band-note{text-align:center;max-width:680px;margin:0 auto}
.band-note p{color:rgba(255,255,255,.74);margin-bottom:26px}

/* ============ FAQ ============ */
.faq-wrap{max-width:860px;margin:0 auto}
.accordion{background:transparent;border:0;margin:0}
.accordion .accordion-item{
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:12px;
  margin-bottom:14px;
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.accordion .accordion-item:hover{border-color:var(--c-brand-300)}
.accordion .accordion-title{
  position:relative;display:block;
  background:var(--c-surface);color:var(--c-ink);
  border:0;margin:0;
  padding:20px 64px 20px 22px;
  font-size:1.02rem;font-weight:600;line-height:1.5;
  transition:background .22s var(--ease),color .22s var(--ease);
}
.accordion .accordion-title:hover{background:#FBFBF6;color:var(--c-brand)}
.accordion .accordion-title::before{
  content:"+";
  position:absolute;right:22px;top:50%;transform:translateY(-50%);
  width:26px;height:26px;border-radius:8px;
  background:var(--c-surface-2);color:var(--c-brand);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--ff-num);font-size:1rem;font-weight:700;
  transition:background .22s var(--ease),color .22s var(--ease);
}
.accordion .accordion-item.is-active{border-color:var(--c-brand-300);box-shadow:var(--sh-2)}
.accordion .accordion-item.is-active > .accordion-title{background:#FBFBF6;color:var(--c-brand)}
.accordion .accordion-item.is-active > .accordion-title::before{
  content:"−";background:var(--c-accent);color:var(--c-brand);
}
.accordion .accordion-content{
  border:0;padding:0 22px 22px;background:transparent;
  color:var(--c-muted);font-size:.9375rem;line-height:1.8;
}
.accordion .accordion-content p{margin:0 0 10px}
.accordion .accordion-content p:last-child{margin-bottom:0}

/* ============ CTA ============ */
.cta{background:var(--c-accent);color:var(--c-brand);padding:84px 0;position:relative;overflow:hidden}
.cta::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(rgba(15,48,40,.06) 1px, transparent 1px) 0 0/18px 18px;
  pointer-events:none;
}
.cta > .container{position:relative;z-index:1}
.cta-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:56px;align-items:start}
.cta h2{font-size:clamp(1.5rem,2.3vw,2.1rem);color:var(--c-brand);margin-bottom:18px}
.cta p{color:rgba(15,48,40,.78)}
.cta-points{margin-top:26px}
.cta-points li{
  position:relative;padding-left:20px;margin-bottom:10px;
  font-size:.9375rem;color:rgba(15,48,40,.82);
}
.cta-points li::before{
  content:"";position:absolute;left:0;top:.66em;
  width:7px;height:7px;border-radius:2px;background:var(--c-brand);
}
.lead-form{
  background:var(--c-surface);
  border-radius:var(--r-img);
  padding:28px;
  box-shadow:0 18px 44px -22px rgba(15,48,40,.4);
  display:grid;gap:16px;
}
.field{display:grid;gap:6px}
.field label{font-size:.875rem;font-weight:600;color:var(--c-ink)}
.field input,.field textarea{
  width:100%;padding:0 14px;height:48px;
  border:1px solid var(--c-border);border-radius:10px;background:#fff;
  font-size:.95rem;color:var(--c-ink);
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.field textarea{height:auto;min-height:112px;padding:12px 14px;line-height:1.7;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:#A7AFAB}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--c-brand-300);
  box-shadow:0 0 0 3px rgba(199,242,74,.5);
}
.field.has-error input,.field.has-error textarea{
  border-color:var(--c-accent-2);box-shadow:0 0 0 3px rgba(228,105,59,.18);
}
.form-note{font-size:.8125rem;color:var(--c-muted);margin:0}
.form-msg{
  display:none;font-size:.875rem;color:var(--c-brand);
  background:rgba(199,242,74,.35);border-radius:10px;padding:11px 14px;
}
.form-msg.is-on{display:block}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--c-brand);color:rgba(255,255,255,.72);
  padding:72px 0 28px;position:relative;overflow:hidden;
}
.site-footer::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(rgba(255,255,255,.06) 1px, transparent 1px) 0 0/18px 18px;
  pointer-events:none;
}
.site-footer > .container{position:relative;z-index:1}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:12px;color:#fff;font-weight:700;font-size:1.02rem;margin-bottom:16px}
.footer-brand .logo-mark{width:38px;height:38px;flex:0 0 38px;font-size:1.2rem}
.footer-about{font-size:.9rem;line-height:1.8;color:rgba(255,255,255,.7);margin:0;max-width:340px}
.footer-col h4{color:#fff;font-size:1rem;margin-bottom:18px;letter-spacing:0}
.footer-col li{margin-bottom:10px;font-size:.9rem}
.footer-col a{color:rgba(255,255,255,.72);transition:color .22s var(--ease)}
.footer-col a:hover{color:var(--c-accent)}
.footer-bottom{
  margin-top:52px;padding-top:22px;border-top:1px solid rgba(255,255,255,.14);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:.8125rem;color:rgba(255,255,255,.6);
}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .56s var(--ease),transform .56s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:22px;bottom:22px;width:44px;height:44px;border-radius:50%;
  background:var(--c-brand);color:var(--c-accent);border:0;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-2);opacity:0;visibility:hidden;
  transition:opacity .32s var(--ease),visibility .32s var(--ease),transform .32s var(--ease);
  z-index:50;
}
.to-top.is-on{opacity:1;visibility:visible}
.to-top:hover{transform:translateY(-2px)}

/* ============ 断点 ============ */
@media (min-width:1024px) and (max-width:1279px){
  :root{--side-w:84px}
  .logo-text,.nav-label,.side-contact{display:none}
  .side-logo{justify-content:center;padding:0;margin-bottom:30px}
  .nav-link{justify-content:center;padding:14px 10px}
  .side-cta{padding:0;width:46px;height:46px;margin:0 auto;border-radius:12px}
  .side-cta span{display:none}
}

@media (max-width:1023px){
  .topbar{
    display:flex;align-items:center;justify-content:space-between;
    position:fixed;top:0;left:0;right:0;height:var(--topbar-h);
    padding:0 18px;background:var(--c-brand);color:#fff;z-index:80;
    box-shadow:0 6px 18px -12px rgba(14,23,20,.6);
  }
  .topbar-logo{display:flex;align-items:center;gap:10px;color:#fff}
  .topbar-logo .logo-mark{width:34px;height:34px;flex:0 0 34px;font-size:1.1rem;border-radius:10px}
  .topbar-logo .logo-text{font-size:.95rem}
  .hamburger{
    width:42px;height:42px;border:1px solid rgba(255,255,255,.22);border-radius:10px;
    background:transparent;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;
    cursor:pointer;padding:0;
  }
  .hamburger span{display:block;width:18px;height:2px;background:#fff;border-radius:2px;transition:transform .28s var(--ease),opacity .28s var(--ease)}
  .hamburger.is-on span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .hamburger.is-on span:nth-child(2){opacity:0}
  .hamburger.is-on span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .sidebar{width:280px;transform:translateX(-100%);padding-top:26px;box-shadow:0 0 40px rgba(14,23,20,.4)}
  .sidebar.is-open{transform:translateX(0)}
  .drawer-mask{
    display:none;position:fixed;inset:0;background:rgba(14,23,20,.5);z-index:65;
  }
  .drawer-mask.is-on{display:block}
  .site-main,.site-footer{margin-left:0}
  .site-main{padding-top:var(--topbar-h)}
  .anchor-bar{top:var(--topbar-h)}
  .page-hero{padding:72px 0 60px}
  .hero-actions{margin-bottom:36px}
  .section{padding:68px 0}
  .databand{padding:68px 0}
  .cta{padding:64px 0}
  .masonry{grid-template-columns:minmax(0,1fr)}
  .timeline{grid-template-columns:repeat(2,minmax(0,1fr))}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-grid{grid-template-columns:minmax(0,1fr);gap:34px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:34px}
  .section-head{margin-bottom:38px}
  .to-top{right:16px;bottom:16px}
}

@media (max-width:639px){
  .container{padding-left:18px;padding-right:18px}
  .page-hero{padding:56px 0 48px}
  .page-hero h1{font-size:1.7rem}
  .hero-sub{font-size:.98rem}
  .hero-actions{flex-direction:column}
  .hero-actions .btn{width:100%}
  .hero-metrics{gap:10px;padding-top:22px}
  .hero-metrics li{min-width:0;flex:1 1 100px}
  .hero-metrics strong{font-size:1.15rem}
  .section{padding:56px 0}
  .step-item{flex-direction:column;align-items:flex-start;gap:12px;padding:22px 14px}
  .step-item:hover{padding-left:14px}
  .step-num{font-size:1.25rem;min-width:0}
  .step-arrow{display:none}
  .timeline{grid-template-columns:minmax(0,1fr)}
  .stats{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-bottom{flex-direction:column}
  .card-body,.card-pad{padding:20px}
  .lead-form{padding:20px}
}

@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
  .reveal{opacity:1;transform:none}
}