/* roulang page: index */
:root{
  --ink:#14494A;
  --ink-deep:#0B3233;
  --ink-light:#2E7D77;
  --vermilion:#C2562F;
  --vermilion-dark:#A8471F;
  --paper:#F6F4EF;
  --paper-2:#F1EFE9;
  --card:#FFFFFF;
  --text:#1B1D1C;
  --text-2:#5A6260;
  --text-3:#8A918E;
  --line:#E3DFD6;
  --line-soft:#EDEAE2;
  --success:#3F7A5A;
  --notice:#B07C1F;
  --r-btn:10px;
  --r-card:14px;
  --r-lg:20px;
  --r-badge:6px;
  --sh-base:0 1px 2px rgba(20,25,24,.04), 0 12px 32px -20px rgba(20,25,24,.18);
  --sh-hover:0 2px 4px rgba(20,25,24,.06), 0 20px 44px -22px rgba(11,50,51,.28);
  --font-sans:"HarmonyOS Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-serif:"Songti SC","Noto Serif SC","SimSun",Georgia,serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.75;
  color:var(--text);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--ink-light);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--vermilion);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--text);letter-spacing:-0.01em;}
h1{font-size:clamp(30px,4.6vw,54px);line-height:1.18;font-weight:800;letter-spacing:-0.02em;}
h2{font-size:clamp(24px,3vw,34px);line-height:1.25;font-weight:700;}
h3{font-size:20px;line-height:1.4;font-weight:600;}
p{margin:0 0 14px;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid rgba(20,73,74,.55);outline-offset:3px;border-radius:4px;}

.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}
.container-narrow{width:100%;max-width:780px;margin:0 auto;padding:0 32px;}
@media (max-width:1199.98px){.container-x,.container-narrow{padding:0 24px;}}
@media (max-width:767.98px){.container-x,.container-narrow{padding:0 18px;}}

/* ============ 顶部信息条 ============ */
.topbar{
  background:var(--ink-deep);
  color:rgba(255,255,255,.86);
  font-size:13px;
  letter-spacing:.02em;
}
.topbar .container-x{
  display:flex;align-items:center;justify-content:space-between;
  min-height:34px;gap:16px;
}
.topbar strong{color:#fff;font-weight:600;}
.topbar .tb-right{color:rgba(255,255,255,.6);}
@media (max-width:767.98px){.topbar{display:none;}}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1040;
  background:rgba(246,244,239,.94);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,backdrop-filter .25s ease;
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom-color:var(--line);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:72px;gap:24px;
}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink);}
.brand:hover{color:var(--ink);}
.brand-mark{
  width:26px;height:26px;border-radius:8px;flex:0 0 auto;
  background:linear-gradient(140deg,var(--ink) 0%,var(--ink-light) 100%);
  position:relative;
}
.brand-mark::after{
  content:"";position:absolute;inset:7px 7px auto auto;
  width:8px;height:8px;border-radius:50%;
  background:var(--vermilion);
}
.brand-text{font-size:19px;font-weight:800;letter-spacing:-0.01em;display:inline-flex;align-items:baseline;gap:0;}
.brand-text em{font-style:normal;color:var(--ink);}
.brand-text i{font-style:normal;color:var(--ink-light);}
.nav-desktop{display:flex;align-items:center;gap:30px;}
.nav-link{
  position:relative;
  font-size:15px;font-weight:500;color:var(--text-2);
  padding:6px 0;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;
  height:2px;background:var(--ink);border-radius:2px;
  transform:scaleX(0);transform-origin:left center;
  transition:transform .22s cubic-bezier(.2,.7,.3,1);
}
.nav-link:hover{color:var(--ink);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--ink);font-weight:600;}
.nav-link.active::after{transform:scaleX(1);}
.btn-primary{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--vermilion);color:#fff;
  font-size:15px;font-weight:600;
  padding:10px 20px;border-radius:var(--r-btn);
  border:1px solid var(--vermilion);
  transition:background .2s ease,transform .12s ease,box-shadow .2s ease;
  cursor:pointer;
}
.btn-primary:hover{background:var(--vermilion-dark);border-color:var(--vermilion-dark);color:#fff;}
.btn-primary:active{transform:scale(.985);}
.btn-primary .arw{transition:transform .2s ease;font-size:14px;}
.btn-primary:hover .arw{transform:translateX(4px);}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;color:var(--text);
  font-size:15px;font-weight:600;
  padding:10px 20px;border-radius:var(--r-btn);
  border:1px solid var(--line);
  transition:border-color .2s ease,color .2s ease,transform .12s ease;
}
.btn-ghost:hover{border-color:var(--ink-light);color:var(--ink);}
.btn-ghost:active{transform:scale(.985);}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--ink-light);font-size:15px;font-weight:600;
}
.btn-text .arw{transition:transform .2s ease;}
.btn-text:hover{color:var(--vermilion);}
.btn-text:hover .arw{transform:translateX(4px);}
.burger{
  display:none;
  width:44px;height:44px;border:1px solid var(--line);border-radius:10px;
  background:#fff;position:relative;cursor:pointer;
}
.burger span{
  position:absolute;left:12px;width:20px;height:1.8px;background:var(--ink);
  border-radius:2px;transition:transform .25s ease,opacity .2s ease;
}
.burger span:nth-child(1){top:15px;}
.burger span:nth-child(2){top:21px;}
.burger span:nth-child(3){top:27px;}
.burger.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.burger.is-open span:nth-child(2){opacity:0;}
.burger.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.mobile-panel{
  display:none;
  background:var(--ink-deep);
  padding:8px 0 24px;
}
.mobile-panel.is-open{display:block;}
.mobile-panel a{
  display:block;color:rgba(255,255,255,.82);font-size:16px;
  padding:14px 18px;border-bottom:1px solid rgba(255,255,255,.08);
}
.mobile-panel a.active{color:#fff;font-weight:600;}
.mobile-panel .m-cta{
  margin:18px;display:block;text-align:center;
  background:var(--vermilion);color:#fff;border-radius:var(--r-btn);
  padding:13px 18px;font-weight:600;border-bottom:none;
}
@media (max-width:991.98px){
  .nav-desktop{display:none;}
  .burger{display:block;}
  .header-inner{height:60px;}
  .brand-text{font-size:17px;}
}

/* ============ Hero ============ */
.hero{
  position:relative;
  padding:84px 0 96px;
  background:linear-gradient(180deg,#FBF9F5 0%,var(--paper) 100%);
  border-bottom:1px solid var(--line-soft);
  overflow:hidden;
}
.hero-grid{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:56px;
  align-items:center;
}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(20,73,74,.08);
  color:var(--ink);
  font-size:12.5px;font-weight:600;letter-spacing:.08em;
  padding:7px 14px;border-radius:999px;
  margin-bottom:22px;
}
.hero-eyebrow::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--vermilion);
}
.hero h1{margin-bottom:18px;}
.hero h1 .hl{color:var(--ink-light);}
.hero-sub{
  font-size:clamp(16px,1.6vw,19px);
  color:var(--text-2);
  line-height:1.7;
  max-width:560px;
  margin-bottom:28px;
}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-bottom:26px;}
.hero-trust{
  display:flex;flex-wrap:wrap;gap:10px 22px;
  font-size:13.5px;color:var(--text-3);
  padding-top:20px;border-top:1px solid var(--line);
}
.hero-trust span{display:inline-flex;align-items:center;gap:7px;}
.hero-trust span::before{
  content:"";width:5px;height:5px;border-radius:50%;background:var(--ink-light);
}
.hero-visual{position:relative;}
.hero-visual img{
  width:100%;aspect-ratio:5/4;object-fit:cover;
  border-radius:var(--r-lg);
  box-shadow:var(--sh-base);
}
.hero-visual::after{
  content:"";position:absolute;right:-18px;bottom:-18px;
  width:96px;height:96px;border-radius:16px;
  border:1.5px solid rgba(20,73,74,.35);
  background:rgba(255,255,255,.35);
  z-index:-1;
}
@media (max-width:991.98px){
  .hero{padding:56px 0 64px;}
  .hero-grid{grid-template-columns:1fr;gap:34px;}
  .hero-visual img{aspect-ratio:16/10;}
}
@media (max-width:575.98px){
  .hero-actions .btn-primary,.hero-actions .btn-ghost{width:100%;justify-content:center;}
}

/* ============ 通用板块 ============ */
.section{padding:96px 0;}
.section.tight{padding:72px 0;}
.section.paper{background:var(--paper-2);}
.section.white{background:#fff;border-top:1px solid var(--line-soft);}
.section-head{margin-bottom:44px;max-width:720px;}
.section-head .kicker{
  display:block;font-family:var(--font-serif);
  font-size:13px;letter-spacing:.16em;color:var(--vermilion);
  margin-bottom:12px;
}
.section-head h2{margin-bottom:14px;}
.section-head p{color:var(--text-2);font-size:16.5px;}
.head-row{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;margin-bottom:40px;
}
.head-row .section-head{margin-bottom:0;}
@media (max-width:767.98px){
  .section{padding:56px 0;}
  .section.tight{padding:48px 0;}
  .head-row{flex-direction:column;align-items:flex-start;gap:14px;}
}

/* ============ 步骤条 ============ */
.steps{
  position:relative;
  display:grid;grid-template-columns:repeat(3,1fr);gap:40px;
}
.steps::before{
  content:"";position:absolute;left:0;right:0;top:34px;height:1px;
  background:linear-gradient(90deg,var(--line) 0%,var(--line) 62%,transparent 100%);
}
.step{position:relative;padding-top:0;}
.step:nth-child(2){transform:translateY(12px);}
.step:nth-child(3){transform:translateY(24px);}
.step-num{
  font-family:var(--font-serif);
  font-size:52px;line-height:1;font-weight:600;
  color:rgba(20,73,74,.2);
  letter-spacing:-0.02em;
  display:block;
  background:var(--paper);
  padding-right:16px;
  position:relative;
  width:fit-content;
  margin-bottom:18px;
}
.section.white .step-num{background:#fff;}
.step h3{margin-bottom:10px;}
.step p{color:var(--text-2);font-size:15.5px;line-height:1.7;}
@media (max-width:991.98px){
  .steps{grid-template-columns:1fr;gap:0;}
  .steps::before{display:none;}
  .step{
    transform:none!important;
    padding:0 0 0 26px;
    position:relative;
    margin-bottom:32px;
  }
  .step::before{
    content:"";position:absolute;left:0;top:6px;bottom:-32px;width:1px;
    background:var(--line);
  }
  .step:last-child::before{bottom:0;}
  .step-num{font-size:40px;background:none;margin-bottom:8px;}
}

/* ============ 卖点区 ============ */
.feature-grid{
  display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:center;
}
.feature-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-lg);
  box-shadow:var(--sh-base);
}
.feature-list{display:grid;gap:20px;}
.feature-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px 24px;
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.feature-item:hover{
  transform:translateY(-4px);
  border-color:rgba(20,73,74,.28);
  box-shadow:var(--sh-hover);
}
.feature-item h3{font-size:17px;margin-bottom:8px;}
.feature-item p{color:var(--text-2);font-size:15.5px;}
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.tag{
  display:inline-flex;align-items:center;
  background:var(--line-soft);color:var(--ink);
  font-size:12.5px;letter-spacing:.06em;
  padding:6px 13px;border-radius:999px;
}
.tag.ink{background:rgba(20,73,74,.1);color:var(--ink);}
@media (max-width:991.98px){
  .feature-grid{grid-template-columns:1fr;gap:32px;}
}

/* ============ 案例证明 ============ */
.proof-grid{
  display:grid;grid-template-columns:7fr 5fr;gap:40px;align-items:start;
}
.proof-main{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:32px;
  box-shadow:var(--sh-base);
}
.proof-main .badge-line{
  font-size:12.5px;letter-spacing:.08em;color:var(--ink-light);
  font-weight:600;margin-bottom:14px;display:block;
}
.proof-main h3{font-size:22px;margin-bottom:16px;}
.proof-points{display:grid;gap:10px;margin-bottom:26px;}
.proof-points li{
  position:relative;padding-left:16px;color:var(--text-2);font-size:15.5px;line-height:1.7;
}
.proof-points li::before{
  content:"";position:absolute;left:0;top:11px;
  width:6px;height:6px;border-radius:1px;background:var(--ink-light);
}
.proof-stats{
  display:grid;grid-template-columns:repeat(2,1fr);gap:24px;
  padding-top:24px;border-top:1px solid var(--line-soft);
}
.stat-num{
  font-family:var(--font-serif);
  font-size:40px;line-height:1.05;font-weight:600;color:var(--ink);
  letter-spacing:-0.02em;
}
.stat-num small{font-size:18px;margin-left:2px;}
.stat-label{font-size:13.5px;color:var(--text-3);margin-top:6px;}
.proof-side{display:grid;gap:0;}
.proof-side-item{
  border-top:1px solid var(--line);
  padding:20px 0;
}
.proof-side-item:first-child{padding-top:0;border-top:none;}
.proof-side-item h3{font-size:17px;margin-bottom:8px;}
.proof-side-item p{color:var(--text-2);font-size:15px;line-height:1.7;margin-bottom:10px;}
@media (max-width:991.98px){
  .proof-grid{grid-template-columns:1fr;gap:32px;}
}

/* ============ 最新信息 ============ */
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px;}
.news-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.news-card:hover{
  transform:translateY(-4px);
  border-color:rgba(20,73,74,.28);
  box-shadow:var(--sh-hover);
}
.news-card .thumb{
  aspect-ratio:16/9;overflow:hidden;background:var(--paper-2);
}
.news-card .thumb img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .4s cubic-bezier(.2,.7,.3,1);
}
.news-card:hover .thumb img{transform:scale(1.04);}
.news-body{padding:24px 26px 26px;display:flex;flex-direction:column;flex:1;}
.news-meta{display:flex;align-items:center;gap:14px;margin-bottom:12px;}
.news-cat{
  background:rgba(20,73,74,.1);color:var(--ink);
  font-size:12.5px;padding:5px 11px;border-radius:var(--r-badge);
  letter-spacing:.04em;
}
.news-date{font-size:13px;color:var(--text-3);}
.news-body h3{font-size:18px;line-height:1.5;margin-bottom:10px;}
.news-body h3 a{color:var(--text);}
.news-body h3 a:hover{color:var(--ink-light);}
.news-excerpt{
  color:var(--text-2);font-size:15px;line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  margin-bottom:16px;
}
.news-foot{margin-top:auto;}
.news-card.wide{
  grid-column:1 / -1;
  flex-direction:row;
}
.news-card.wide .thumb{flex:0 0 42%;aspect-ratio:auto;min-height:230px;}
.news-card.wide .news-body{padding:32px;}
.news-card.wide .news-body h3{font-size:22px;}
@media (max-width:991.98px){
  .news-grid{grid-template-columns:1fr;gap:22px;}
  .news-card.wide{flex-direction:column;}
  .news-card.wide .thumb{flex:none;aspect-ratio:16/9;min-height:0;}
}
.empty-state{
  border:1px dashed #CFC9BC;border-radius:var(--r-card);
  padding:48px 28px;text-align:center;background:#fff;
}
.empty-state .es-icon{
  width:44px;height:44px;margin:0 auto 16px;color:var(--ink-light);
}
.empty-state .es-title{font-size:16px;font-weight:600;margin-bottom:6px;}
.empty-state .es-desc{font-size:14px;color:var(--text-3);margin-bottom:16px;}

/* ============ FAQ ============ */
.faq-wrap{display:grid;grid-template-columns:250px 1fr;gap:56px;align-items:start;}
.faq-intro h2{margin-bottom:12px;}
.faq-intro p{color:var(--text-2);font-size:15.5px;}
.faq-acc .accordion-item{
  background:transparent;border:none;border-top:1px solid var(--line);
  border-radius:0;
}
.faq-acc .accordion-item:last-child{border-bottom:1px solid var(--line);}
.faq-acc .accordion-button{
  background:transparent;border:none;box-shadow:none;
  padding:22px 44px 22px 0;
  font-size:16px;font-weight:600;color:var(--text);
  position:relative;border-radius:0;
}
.faq-acc .accordion-button:not(.collapsed){color:var(--text);}
.faq-acc .accordion-button::after{
  display:none;
}
.faq-acc .accordion-button .plus{
  position:absolute;right:6px;top:50%;transform:translateY(-50%);
  width:16px;height:16px;transition:transform .25s ease,color .25s ease;
  color:var(--text-3);font-size:16px;line-height:1;text-align:center;
}
.faq-acc .accordion-button:not(.collapsed) .plus{
  transform:translateY(-50%) rotate(45deg);color:var(--vermilion);
}
.faq-acc .accordion-button::before{
  content:"";position:absolute;left:-16px;top:22px;bottom:22px;width:2px;
  background:var(--vermilion);opacity:0;transition:opacity .22s ease;
}
.faq-acc .accordion-button:not(.collapsed)::before{opacity:1;}
.faq-acc .accordion-button:focus{box-shadow:none;}
.faq-acc .accordion-body{
  padding:0 40px 24px 0;
  font-size:15px;line-height:1.8;color:var(--text-2);
}
@media (max-width:991.98px){
  .faq-wrap{grid-template-columns:1fr;gap:26px;}
  .faq-acc .accordion-button{padding:18px 40px 18px 0;}
  .faq-acc .accordion-button::before{left:-12px;}
}

/* ============ CTA + 表单 ============ */
.cta-band{
  background:var(--ink-deep);
  color:#fff;
  padding:96px 0;
}
.cta-grid{display:grid;grid-template-columns:6fr 5fr;gap:64px;align-items:start;}
.cta-band h2{color:#fff;margin-bottom:16px;}
.cta-band .cta-lead{color:rgba(255,255,255,.72);font-size:16.5px;margin-bottom:32px;max-width:460px;}
.guarantee{display:grid;gap:16px;}
.guarantee-item{
  border-top:1px solid rgba(255,255,255,.16);
  padding-top:14px;
  font-size:15px;color:rgba(255,255,255,.86);
}
.guarantee-item strong{color:#fff;font-weight:600;display:block;margin-bottom:4px;}
.form-card{
  background:#fff;border-radius:16px;padding:32px;
  box-shadow:0 24px 60px -30px rgba(0,0,0,.5);
}
.form-card h3{font-size:19px;margin-bottom:6px;}
.form-card .fc-sub{font-size:14px;color:var(--text-3);margin-bottom:22px;}
.field{margin-bottom:18px;}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:7px;color:var(--text);}
.field input,.field select{
  width:100%;height:46px;padding:0 14px;
  border:1px solid var(--line);border-radius:var(--r-btn);
  background:#fff;font-size:15px;color:var(--text);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field input::placeholder{color:var(--text-3);}
.field input:focus,.field select:focus{
  outline:none;border-color:var(--ink-light);
  box-shadow:0 0 0 3px rgba(20,73,74,.12);
}
.form-card .btn-primary{width:100%;justify-content:center;height:48px;}
.privacy-note{font-size:12px;color:var(--text-3);margin-top:14px;line-height:1.6;}
@media (max-width:991.98px){
  .cta-band{padding:64px 0;}
  .cta-grid{grid-template-columns:1fr;gap:36px;}
  .cta-grid .form-col{order:-1;}
}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--ink-deep);color:rgba(255,255,255,.75);
  padding-top:64px;
}
.footer-grid{
  display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;
  padding-bottom:48px;
}
.footer-brand .brand{color:#fff;}
.footer-brand .brand-text em{color:#fff;}
.footer-brand .brand-text i{color:#8FC4BC;}
.footer-brand p{
  font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);
  margin-top:18px;max-width:320px;
}
.footer-col h4{
  font-size:14px;color:#8FC4BC;font-weight:600;letter-spacing:.06em;
  margin-bottom:16px;
}
.footer-col a{
  display:block;font-size:14px;color:rgba(255,255,255,.75);
  padding:6px 0;transition:color .2s ease,transform .2s ease;
}
.footer-col a:hover{color:#fff;transform:translateX(2px);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0 30px;
  display:flex;flex-wrap:wrap;gap:12px 24px;
  align-items:center;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.5);
}
@media (max-width:991.98px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-brand{grid-column:1 / -1;}
}
@media (max-width:575.98px){
  .footer-grid{grid-template-columns:1fr 1fr;}
}

/* ============ 动效 ============ */
.fade-up{opacity:0;transform:translateY(12px);}
.fade-up.in{opacity:1;transform:none;transition:opacity .5s cubic-bezier(.2,.7,.3,1),transform .5s cubic-bezier(.2,.7,.3,1);}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  .fade-up{opacity:1!important;transform:none!important;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --paper:#F6F4EF;
  --paper-2:#F1EFE9;
  --card:#FFFFFF;
  --ink:#1B1D1C;
  --ink-2:#5A6260;
  --ink-3:#8A918E;
  --line:#E3DFD6;
  --line-2:#EDEAE2;
  --sand:#EDEAE2;
  --teal:#14494A;
  --teal-d:#0B3233;
  --teal-l:#2E7D77;
  --cinnabar:#C2562F;
  --cinnabar-d:#A9481F;
  --success:#3F7A5A;
  --warn:#B07C1F;
  --r-btn:10px;
  --r-card:14px;
  --r-lg:20px;
  --r-badge:6px;
  --sh-1:0 1px 2px rgba(20,25,24,.04), 0 12px 32px -20px rgba(20,25,24,.18);
  --sh-2:0 2px 4px rgba(20,25,24,.06), 0 20px 44px -22px rgba(11,50,51,.28);
  --sans:"HarmonyOS Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --serif:"Songti SC","Noto Serif SC",SimSun,serif;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  padding:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
.container-x{max-width:1200px;margin:0 auto;padding:0 32px;width:100%}
.narrow{max-width:760px}
:focus-visible{outline:2px solid rgba(20,73,74,.55);outline-offset:3px;border-radius:4px}

/* ===== 顶部信息条 ===== */
.topbar{background:var(--teal-d);color:rgba(255,255,255,.86);font-size:13px;letter-spacing:.01em}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:34px}
.topbar-inner span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* ===== 导航 ===== */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,239,.94);
  border-bottom:1px solid transparent;
  transition:background .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:24px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:14px;height:14px;border-radius:4px;background:var(--teal);position:relative;display:inline-block;flex-shrink:0;
}
.brand-mark::after{
  content:"";position:absolute;right:-3px;bottom:-3px;width:6px;height:6px;border-radius:2px;background:var(--cinnabar);
}
.brand-text{font-size:19px;font-weight:800;letter-spacing:-.01em;line-height:1;display:inline-flex;align-items:baseline;gap:2px}
.brand-text em{font-style:normal;color:var(--teal)}
.brand-text i{font-style:normal;color:var(--ink)}
.nav-desktop{display:flex;align-items:center;gap:30px}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--ink-2);padding:6px 0;transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--teal);
  transition:width .22s var(--ease);
}
.nav-link:hover{color:var(--teal)}
.nav-link:hover::after,.nav-link.active::after{width:100%}
.nav-link.active{color:var(--teal);font-weight:600}
.btn-primary{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--cinnabar);color:#fff;border:0;border-radius:var(--r-btn);
  padding:11px 20px;font-size:15px;font-weight:600;line-height:1;
  cursor:pointer;transition:background .2s var(--ease),transform .12s var(--ease),box-shadow .2s var(--ease);
  box-shadow:0 10px 24px -16px rgba(194,86,47,.9);
}
.btn-primary .arw{transition:transform .2s var(--ease);display:inline-block}
.btn-primary:hover{background:var(--cinnabar-d)}
.btn-primary:hover .arw{transform:translateX(4px)}
.btn-primary:active{transform:scale(.985)}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;color:var(--ink);border:1px solid var(--line);border-radius:var(--r-btn);
  padding:10px 18px;font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  transition:border-color .2s var(--ease),color .2s var(--ease),transform .12s var(--ease);
}
.btn-ghost:hover{border-color:var(--teal);color:var(--teal)}
.btn-ghost:active{transform:scale(.985)}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--teal);font-size:15px;font-weight:600}
.btn-text .arw{transition:transform .2s var(--ease)}
.btn-text:hover .arw{transform:translateX(4px)}
.burger{
  display:none;width:44px;height:44px;border:0;background:transparent;
  flex-direction:column;justify-content:center;align-items:center;gap:5px;cursor:pointer;padding:0;
}
.burger span{display:block;width:22px;height:2px;background:var(--teal);border-radius:2px;transition:transform .25s var(--ease),opacity .2s var(--ease)}
.burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-panel{
  display:none;position:absolute;top:100%;left:0;right:0;
  background:var(--teal-d);padding:6px 18px 22px;
  box-shadow:0 24px 48px -28px rgba(11,50,51,.7);
}
.mobile-panel.open{display:flex;flex-direction:column}
.mobile-panel a{
  color:rgba(255,255,255,.84);font-size:15px;padding:14px 0;
  border-bottom:1px solid rgba(255,255,255,.10);
}
.mobile-panel a.active{color:#fff;font-weight:600}
.mobile-panel .m-cta{
  margin-top:16px;background:var(--cinnabar);color:#fff;text-align:center;
  border-radius:var(--r-btn);padding:13px 0;border-bottom:0;font-weight:600;
}
.read-progress{position:absolute;left:0;bottom:-1px;height:2px;width:0;background:var(--teal);transition:width .1s linear}

/* ===== 面包屑 ===== */
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--ink-3);margin:22px 0 26px;
}
.crumbs a{color:var(--ink-3);transition:color .2s var(--ease)}
.crumbs a:hover{color:var(--teal)}
.crumbs .sep{color:#CFC9BC}
.crumbs .current{
  color:var(--teal);max-width:340px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}

/* ===== 文章头部 ===== */
.article-head{padding:2px 0 8px}
.tag-cat{
  display:inline-block;background:rgba(20,73,74,.10);color:var(--teal);
  border-radius:var(--r-badge);padding:5px 11px;font-size:12.5px;font-weight:600;letter-spacing:.08em;
}
.article-title{
  font-size:clamp(28px,3.7vw,44px);
  line-height:1.24;
  letter-spacing:-.02em;
  font-weight:800;
  margin:16px 0 0;
  max-width:900px;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  margin-top:18px;font-size:13px;color:var(--ink-3);
}
.article-meta i{font-style:normal;color:#CFC9BC}
.article-rule{height:1px;background:var(--line);margin:30px 0 0}

/* ===== 封面图 ===== */
.article-cover{margin:34px 0 0}
.article-cover img{
  width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-card);
  border:1px solid var(--line);background:var(--sand);
}

/* ===== 正文 ===== */
.article-main{padding:40px 0 8px}
.article-wrap{max-width:760px;margin:0 auto}
.article-body{font-size:17px;line-height:1.85;color:var(--ink)}
.article-body > *:first-child{margin-top:0}
.article-body p{margin:0 0 18px}
.article-body h2{
  font-size:24px;line-height:1.35;font-weight:700;letter-spacing:-.01em;
  margin:40px 0 14px;padding-left:12px;border-left:3px solid var(--teal);
}
.article-body h3{font-size:20px;line-height:1.4;font-weight:600;margin:28px 0 10px}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:22px}
.article-body ul li{list-style:none;position:relative;line-height:1.8;margin-bottom:8px}
.article-body ul li::before{
  content:"";position:absolute;left:-18px;top:.72em;width:6px;height:6px;border-radius:2px;background:var(--teal-l);
}
.article-body ol{counter-reset:li}
.article-body ol li{list-style:decimal;line-height:1.8;margin-bottom:8px;color:var(--ink)}
.article-body ol li::marker{color:var(--teal);font-weight:700}
.article-body blockquote{
  margin:22px 0;padding:16px 22px;background:var(--paper-2);
  border-left:3px solid var(--teal);border-radius:0 var(--r-btn) var(--r-btn) 0;color:var(--ink-2);
}
.article-body a{color:var(--teal-l);border-bottom:1px solid rgba(20,73,74,.4);transition:color .2s var(--ease),border-color .2s var(--ease)}
.article-body a:hover{color:var(--cinnabar);border-color:rgba(194,86,47,.5)}
.article-body img{border-radius:var(--r-card);margin:10px 0 8px;width:100%}
.article-body figcaption{font-size:13px;color:var(--ink-3);text-align:center;margin-bottom:18px}
.article-body strong{font-weight:700}
.article-body table{width:100%;border-collapse:collapse;margin:18px 0;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.article-body th{background:var(--sand);font-weight:600}
.article-body hr{border:0;height:1px;background:var(--line);margin:32px 0}

/* ===== 空态 ===== */
.empty-state{
  border:1px dashed #CFC9BC;border-radius:var(--r-card);
  padding:48px 28px;text-align:center;background:#fff;
}
.empty-state svg{margin:0 auto 14px;display:block}
.empty-state .es-title{font-size:16px;font-weight:600;margin-bottom:6px}
.empty-state .es-desc{font-size:14px;color:var(--ink-2);margin-bottom:16px}

/* ===== 相关推荐 ===== */
.related{margin-top:52px;border-top:1px solid var(--line);padding-top:30px}
.related h2{font-size:20px;font-weight:700;margin-bottom:6px}
.related p.related-note{font-size:14px;color:var(--ink-2);margin-bottom:14px}
.related-item{
  display:flex;align-items:baseline;justify-content:space-between;gap:18px;
  padding:15px 0;border-bottom:1px solid var(--line-2);
}
.related-item .ri-title{font-size:16px;font-weight:600;transition:color .2s var(--ease)}
.related-item:hover .ri-title{color:var(--teal)}
.related-item .ri-date{font-size:13px;color:var(--ink-3);white-space:nowrap}
.related-back{margin-top:22px}

/* ===== CTA ===== */
.cta-band-wrap{padding:56px 0 4px}
.cta-band{
  background:var(--teal-d);color:#fff;border-radius:var(--r-lg);
  padding:42px 44px;display:flex;align-items:center;justify-content:space-between;gap:32px;
}
.cta-band h2{font-size:clamp(20px,2.4vw,26px);font-weight:700;line-height:1.35;letter-spacing:-.01em}
.cta-band p{font-size:15px;color:rgba(255,255,255,.72);margin-top:10px;max-width:560px}
.cta-band .btn-primary{flex-shrink:0;padding:13px 24px}
.assure-row{display:flex;flex-wrap:wrap;gap:22px;margin-top:18px}
.assure-row span{
  font-size:13px;color:rgba(255,255,255,.62);padding-top:10px;
  border-top:1px solid rgba(255,255,255,.18);min-width:150px;
}

/* ===== 页脚 ===== */
.site-footer{background:var(--teal-d);color:#fff;margin-top:80px;padding-top:64px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding-bottom:44px}
.footer-brand .brand-text em{color:#fff}
.footer-brand .brand-text i{color:rgba(255,255,255,.86)}
.footer-brand .brand-mark{background:#fff}
.footer-brand .brand-mark::after{background:var(--cinnabar)}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);margin-top:16px;max-width:360px}
.footer-col h4{font-size:14px;font-weight:600;color:#7FB3AC;margin-bottom:14px;letter-spacing:.04em}
.footer-col a{
  display:block;font-size:14px;color:rgba(255,255,255,.75);
  padding:6px 0;transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.14);
  padding:20px 0 26px;display:flex;flex-wrap:wrap;gap:12px;
  align-items:center;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.55);
}

/* ===== 动效 ===== */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
.reveal.d1{transition-delay:.04s}
.reveal.d2{transition-delay:.09s}

/* ===== 响应式 ===== */
@media (max-width:1199px){
  .container-x{padding:0 24px}
}
@media (max-width:991px){
  .nav-desktop{display:none}
  .burger{display:flex}
  .header-inner{height:64px}
  .topbar{display:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-brand{grid-column:1 / -1}
  .cta-band{flex-direction:column;align-items:flex-start;padding:34px 28px}
  .article-main{padding:32px 0 8px}
}
@media (max-width:767px){
  .container-x{padding:0 18px}
  .article-title{font-size:clamp(24px,6.2vw,32px)}
  .article-body{font-size:16.5px}
  .article-body h2{font-size:21px;margin-top:34px}
  .article-body h3{font-size:18px}
  .crumbs .current{max-width:200px}
  .cta-band-wrap{padding:44px 0 0}
  .site-footer{padding-top:52px;margin-top:64px}
  .footer-grid{padding-bottom:34px}
}
@media (max-width:575px){
  .brand-text{font-size:17px}
  .footer-grid{grid-template-columns:1fr;gap:22px}
  .footer-brand p{max-width:none}
  .related-item{flex-direction:column;gap:4px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .empty-state{padding:36px 20px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  .read-progress{transition:none}
}

/* roulang page: category1 */
:root{
  --ink:#1B1D1C;
  --ink-2:#5A6260;
  --ink-3:#8A918E;
  --paper:#F6F4EF;
  --paper-2:#F1EFE9;
  --card:#FFFFFF;
  --line:#E3DFD6;
  --line-soft:#EDEAE2;
  --primary:#14494A;
  --primary-deep:#0B3233;
  --primary-light:#2E7D77;
  --primary-soft:#63B3A8;
  --accent:#C2562F;
  --accent-dark:#A8451F;
  --success:#3F7A5A;
  --warn:#B07C1F;
  --r-btn:10px;
  --r-card:14px;
  --r-lg:20px;
  --r-badge:6px;
  --sh-1:0 1px 2px rgba(20,25,24,.04), 0 12px 32px -20px rgba(20,25,24,.18);
  --sh-2:0 2px 4px rgba(20,25,24,.06), 0 20px 44px -22px rgba(11,50,51,.28);
  --font-sans:"HarmonyOS Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-serif:"Songti SC","Noto Serif SC",SimSun,Georgia,serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.75;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;}
h1,h2,h3,h4{margin:0;line-height:1.3;}
p{margin:0;}
::selection{background:rgba(20,73,74,.16);}
a:focus-visible,button:focus-visible{outline:2px solid rgba(20,73,74,.35);outline-offset:2px;border-radius:6px;}

/* ---------- 容器 ---------- */
.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}
@media (max-width:1199px){.container-x{padding:0 24px;}}
@media (max-width:767px){.container-x{padding:0 18px;}}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(246,244,239,.86);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.92);
  border-bottom-color:var(--line);
  box-shadow:0 8px 26px -22px rgba(11,50,51,.6);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px;}
.brand{display:inline-flex;align-items:center;gap:10px;}
.brand-mark{width:14px;height:14px;border-radius:4px;background:var(--primary);position:relative;flex:none;}
.brand-mark::after{content:"";position:absolute;left:4px;top:4px;width:6px;height:6px;border-radius:2px;background:var(--accent);}
.brand-text{display:inline-flex;align-items:baseline;font-size:19px;font-weight:800;letter-spacing:-.01em;line-height:1;}
.brand-text em{font-style:normal;color:var(--primary);}
.brand-text i{font-style:normal;color:var(--ink);}
.nav-desktop{display:flex;align-items:center;gap:30px;}
.nav-link{position:relative;font-size:15px;font-weight:500;color:var(--ink-2);padding:8px 0;transition:color .2s ease;}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform .25s ease;}
.nav-link:hover{color:var(--primary);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--primary);font-weight:600;}
.nav-link.active::after{transform:scaleX(1);}
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:10px 20px;border:0;border-radius:var(--r-btn);
  background:var(--accent);color:#fff;font-size:15px;font-weight:600;
  cursor:pointer;transition:background .2s ease,transform .15s ease,box-shadow .2s ease;
}
.btn-primary:hover{background:var(--accent-dark);color:#fff;box-shadow:0 14px 26px -18px rgba(194,86,47,.9);}
.btn-primary .arw{transition:transform .2s ease;}
.btn-primary:hover .arw{transform:translateX(4px);}
.btn-primary:active{transform:scale(.985);}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:10px 20px;
  border:1px solid var(--line);border-radius:var(--r-btn);background:#fff;color:var(--ink);
  font-size:15px;font-weight:600;transition:border-color .2s ease,color .2s ease,transform .15s ease;
}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);}
.btn-ghost:active{transform:scale(.985);}
.burger{
  display:none;width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:var(--r-btn);
  flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer;
  position:relative;z-index:120;padding:0;
}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--primary);transition:transform .28s ease,opacity .2s ease;}
.burger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.burger.is-open span:nth-child(2){opacity:0;}
.burger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.mobile-panel{
  position:fixed;top:0;right:0;height:100vh;width:84%;max-width:340px;z-index:110;
  background:var(--primary-deep);padding:92px 28px 40px;display:flex;flex-direction:column;
  transform:translateX(100%);transition:transform .32s cubic-bezier(.2,.7,.3,1);
  box-shadow:-24px 0 60px -34px rgba(0,0,0,.7);
}
.mobile-panel.is-open{transform:translateX(0);}
.mobile-panel a{color:rgba(255,255,255,.82);font-size:16px;padding:14px 0;border-bottom:1px solid rgba(255,255,255,.1);}
.mobile-panel a.active{color:#fff;font-weight:600;}
.mobile-panel a.m-cta{
  margin-top:24px;border:0;background:var(--accent);color:#fff;text-align:center;
  border-radius:var(--r-btn);font-weight:600;padding:14px 16px;
}
@media (max-width:991px){
  .nav-desktop{display:none;}
  .burger{display:flex;}
  .header-inner{height:60px;}
  .brand-text{font-size:17px;}
}

/* ---------- 页头 ---------- */
.page-hero{background:var(--paper-2);border-bottom:1px solid var(--line);padding:34px 0 56px;}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:48px;align-items:center;}
.breadcrumb-x{display:flex;flex-wrap:wrap;align-items:center;gap:9px;font-size:13px;color:var(--ink-3);margin:0 0 22px;}
.breadcrumb-x a{color:var(--ink-3);transition:color .2s ease;}
.breadcrumb-x a:hover{color:var(--primary);}
.breadcrumb-x .sep{color:#C7C2B7;}
.breadcrumb-x .current{color:var(--primary);}
.page-title{
  font-size:clamp(28px,3.8vw,44px);line-height:1.2;font-weight:800;letter-spacing:-.02em;
  color:var(--ink);margin:0 0 16px;
}
.page-lead{font-size:17px;color:var(--ink-2);max-width:620px;}
.hero-thumb{border-radius:var(--r-card);overflow:hidden;aspect-ratio:16/9;background:#fff;box-shadow:var(--sh-1);}
.hero-thumb img{width:100%;height:100%;object-fit:cover;}
@media (max-width:991px){
  .hero-grid{grid-template-columns:1fr;gap:26px;}
  .hero-thumb{display:none;}
  .page-hero{padding:26px 0 40px;}
}

/* ---------- 正文两栏 ---------- */
.doc-wrap{padding:72px 0 96px;}
.doc-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:56px;align-items:start;}
.toc{position:sticky;top:100px;}
.toc-title{font-size:12px;letter-spacing:.16em;color:var(--ink-3);margin:0 0 14px;}
.toc ol{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px;}
.toc a{
  display:block;font-size:14px;color:var(--ink-2);padding:9px 12px 9px 14px;
  border-left:2px solid var(--line-soft);
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.toc a:hover{color:var(--primary);border-left-color:var(--primary-light);}
.toc a.active{color:var(--primary);font-weight:600;border-left-color:var(--primary);background:rgba(20,73,74,.05);}
.doc-body{max-width:780px;}
.doc-section{padding-top:6px;margin-bottom:56px;scroll-margin-top:104px;}
.doc-section:last-child{margin-bottom:0;}
.doc-section h2{
  display:flex;align-items:baseline;gap:12px;
  font-size:clamp(22px,2.4vw,28px);font-weight:700;letter-spacing:-.01em;color:var(--ink);margin:0 0 16px;
}
.doc-section h2 .idx{font-family:var(--font-serif);font-size:19px;font-weight:700;color:rgba(20,73,74,.34);}
.doc-section > p{color:var(--ink-2);font-size:16.5px;line-height:1.8;margin-bottom:18px;}
.point-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:13px;}
.point-list li{position:relative;padding-left:20px;font-size:16px;line-height:1.75;color:var(--ink-2);}
.point-list li::before{content:"";position:absolute;left:0;top:.7em;width:7px;height:7px;border-radius:2px;background:var(--primary);}
.point-list strong{color:var(--ink);font-weight:600;}
.note{
  margin-top:24px;padding:18px 22px;border-left:3px solid var(--primary);
  background:var(--paper-2);border-radius:0 var(--r-card) var(--r-card) 0;
  font-size:15.5px;color:var(--ink-2);
}
.note strong{color:var(--primary);font-weight:600;}
.steps{list-style:none;margin:6px 0 0;padding:0;position:relative;}
.steps::before{content:"";position:absolute;left:23px;top:22px;bottom:22px;width:1px;background:var(--line);}
.steps li{position:relative;padding:0 0 28px 68px;}
.steps li:last-child{padding-bottom:0;}
.step-no{
  position:absolute;left:0;top:-2px;width:47px;height:47px;border-radius:12px;
  background:#fff;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;
  font-family:var(--font-serif);font-size:18px;font-weight:700;color:var(--primary);
}
.steps h3{font-size:18px;font-weight:600;color:var(--ink);margin:6px 0 6px;}
.steps p{font-size:15.5px;color:var(--ink-2);line-height:1.75;}
.env-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:6px;}
.env-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:24px;
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.env-card:hover{transform:translateY(-4px);border-color:rgba(20,73,74,.32);box-shadow:var(--sh-2);}
.env-card h3{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:600;margin:0 0 10px;color:var(--ink);}
.env-card h3::before{content:"";width:8px;height:8px;border-radius:2px;background:var(--accent);flex:none;}
.env-card p{font-size:15px;color:var(--ink-2);line-height:1.72;}
.trouble-list{margin-top:6px;}
.trouble-item{
  display:grid;grid-template-columns:210px minmax(0,1fr);gap:24px;
  padding:20px 0;border-top:1px solid var(--line-soft);
}
.trouble-item:last-child{border-bottom:1px solid var(--line-soft);}
.trouble-item h3{font-size:16px;font-weight:600;color:var(--ink);}
.trouble-item p{font-size:15.5px;color:var(--ink-2);line-height:1.75;}
@media (max-width:991px){
  .doc-wrap{padding:52px 0 72px;}
  .doc-layout{grid-template-columns:1fr;gap:0;}
  .toc{position:static;margin-bottom:36px;padding-bottom:6px;overflow-x:auto;}
  .toc-title{display:none;}
  .toc ol{flex-direction:row;gap:8px;}
  .toc a{
    white-space:nowrap;background:#fff;border:1px solid var(--line);border-radius:var(--r-badge);
    padding:9px 15px;
  }
  .toc a.active{background:var(--primary);border-color:var(--primary);color:#fff;}
}
@media (max-width:575px){
  .env-grid{grid-template-columns:1fr;}
  .trouble-item{grid-template-columns:1fr;gap:8px;}
  .doc-section{margin-bottom:44px;}
}

/* ---------- FAQ ---------- */
.section{padding:80px 0;}
.section-alt{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.faq-head{max-width:720px;margin-bottom:34px;}
.faq-head h2{font-size:clamp(24px,3vw,32px);font-weight:700;letter-spacing:-.01em;color:var(--ink);margin-bottom:12px;}
.faq-head p{color:var(--ink-2);font-size:16px;}
.accordion-x{border-radius:0;}
.accordion-x .accordion-item{background:transparent;border:0;border-top:1px solid var(--line);}
.accordion-x .accordion-item:last-child{border-bottom:1px solid var(--line);}
.accordion-x .accordion-header{margin:0;}
.accordion-x .accordion-button{
  position:relative;background:transparent;border:0;border-radius:0;box-shadow:none;
  padding:20px 46px 20px 16px;font-size:16px;font-weight:600;color:var(--ink);
  transition:color .2s ease;
}
.accordion-x .accordion-button::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:2px;border-radius:2px;
  background:transparent;transition:background .25s ease;
}
.accordion-x .accordion-button:not(.collapsed){color:var(--primary);background:transparent;box-shadow:none;}
.accordion-x .accordion-button:not(.collapsed)::before{background:var(--accent);}
.accordion-x .accordion-button:focus{box-shadow:none;outline:2px solid rgba(20,73,74,.3);outline-offset:-4px;}
.accordion-x .accordion-button::after{
  content:"+";background-image:none;width:24px;height:24px;margin:0;
  position:absolute;right:12px;top:50%;transform:translateY(-50%);
  display:flex;align-items:center;justify-content:center;
  font-size:22px;font-weight:400;color:var(--primary);line-height:1;
  transition:transform .25s ease,color .25s ease;
}
.accordion-x .accordion-button:not(.collapsed)::after{transform:translateY(-50%) rotate(45deg);color:var(--accent);}
.accordion-x .accordion-body{padding:0 46px 22px 16px;font-size:15px;line-height:1.82;color:var(--ink-2);}

/* ---------- CTA ---------- */
.cta-band{position:relative;overflow:hidden;background:var(--primary-deep);color:#fff;padding:62px 0;}
.cta-band::before{
  content:"";position:absolute;inset:0;opacity:.16;
  background-image:url(/assets/images/backpic/back-3.webp);
  background-size:cover;background-position:center;
}
.cta-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;}
.cta-inner h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;color:#fff;margin-bottom:10px;letter-spacing:-.01em;}
.cta-inner p{color:rgba(255,255,255,.78);font-size:16px;max-width:640px;}
.cta-band .btn-primary{flex:none;}
@media (max-width:767px){
  .section{padding:56px 0;}
  .cta-band{padding:48px 0;}
  .cta-inner{flex-direction:column;align-items:flex-start;gap:24px;}
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--primary-deep);color:#fff;padding-top:64px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px;}
.footer-brand .brand-text em,.footer-brand .brand-text i{color:#fff;}
.footer-brand .brand-mark{background:rgba(255,255,255,.92);}
.footer-brand .brand-mark::after{background:var(--accent);}
.footer-brand p{margin-top:16px;font-size:14.5px;line-height:1.78;color:rgba(255,255,255,.72);max-width:340px;}
.footer-col h4{font-size:14px;font-weight:600;letter-spacing:.04em;color:var(--primary-soft);margin-bottom:16px;}
.footer-col a{display:block;font-size:14px;color:rgba(255,255,255,.75);padding:7px 0;transition:color .2s ease,transform .2s ease;}
.footer-col a:hover{color:#fff;transform:translateX(2px);}
.footer-bottom{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;
  border-top:1px solid rgba(255,255,255,.14);padding:20px 0 28px;
  font-size:13px;color:rgba(255,255,255,.6);
}
@media (max-width:991px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px;}}
@media (max-width:575px){.footer-grid{grid-template-columns:1fr;gap:28px;}}

/* ---------- 入场动效 ---------- */
.js .reveal{opacity:0;transform:translateY(12px);transition:opacity .4s cubic-bezier(.2,.7,.3,1),transform .4s cubic-bezier(.2,.7,.3,1);}
.js .reveal.is-in{opacity:1;transform:none;}
.js .reveal.d1{transition-delay:.04s;}
.js .reveal.d2{transition-delay:.08s;}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation:none!important;transition:none!important;}
  .js .reveal{opacity:1;transform:none;}
}

/* roulang page: category2 */
:root{
  --ink:#14494A;
  --ink-deep:#0B3233;
  --ink-soft:#2E7D77;
  --acc:#C2562F;
  --acc-deep:#A8471F;
  --bg:#F6F4EF;
  --paper:#FFFFFF;
  --band:#F1EFE9;
  --text:#1B1D1C;
  --text-2:#5A6260;
  --text-3:#8A918E;
  --line:#E3DFD6;
  --line-2:#EDEAE2;
  --ok:#3F7A5A;
  --warn:#B07C1F;
  --r-btn:10px;
  --r-card:14px;
  --r-lg:20px;
  --r-badge:6px;
  --sh:0 1px 2px rgba(20,25,24,.04), 0 12px 32px -20px rgba(20,25,24,.18);
  --sh-h:0 2px 4px rgba(20,25,24,.06), 0 20px 44px -22px rgba(11,50,51,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --serif:"Songti SC","Noto Serif SC",SimSun,serif;
}
*,*::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:"HarmonyOS Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--ink);text-decoration:none}
p{margin:0 0 14px}
h1,h2,h3,h4{margin:0;line-height:1.3;color:var(--ink-deep);font-weight:700}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;cursor:pointer}
[hidden]{display:none!important}
:focus-visible{outline:2px solid rgba(20,73,74,.35);outline-offset:2px;border-radius:6px}

/* ---------- 容器 ---------- */
.container-x{width:100%;max-width:1200px;margin:0 auto;padding-left:32px;padding-right:32px}
.container-narrow{width:100%;max-width:760px;margin:0 auto;padding-left:32px;padding-right:32px}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(246,244,239,.9);
  border-bottom:1px solid transparent;
  transition:background .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom-color:var(--line);
  box-shadow:0 6px 24px -20px rgba(11,50,51,.5);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:inline-flex;align-items:center;gap:11px}
.brand-mark{position:relative;display:inline-block;width:16px;height:16px;border-radius:5px;background:var(--ink);flex:none}
.brand-mark::after{content:"";position:absolute;right:-4px;bottom:-4px;width:8px;height:8px;border-radius:2px;background:var(--acc)}
.brand-text{display:inline-flex;gap:2px;font-size:19px;font-weight:800;letter-spacing:-.02em;color:var(--ink)}
.brand-text em{font-style:normal;color:var(--ink)}
.brand-text i{font-style:normal;color:var(--ink-deep)}
.nav-desktop{display:flex;align-items:center;gap:30px}
.nav-link{position:relative;display:inline-block;padding:6px 0;font-size:15px;font-weight:500;color:var(--text-2);transition:color .2s var(--ease)}
.nav-link::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--ink);transition:width .25s var(--ease)}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{width:100%}
.nav-link.active{color:var(--ink);font-weight:600}
.nav-link.active::after{width:100%}
.btn-primary{
  display:inline-flex;align-items:center;gap:6px;
  padding:10px 20px;border:none;border-radius:var(--r-btn);
  background:var(--acc);color:#fff;font-size:15px;font-weight:600;
  transition:background .2s var(--ease),transform .15s var(--ease),box-shadow .2s var(--ease);
}
.btn-primary:hover{background:var(--acc-deep);color:#fff}
.btn-primary:active{transform:scale(.985)}
.btn-primary .arw{transition:transform .2s var(--ease)}
.btn-primary:hover .arw{transform:translateX(4px)}
.btn-primary.btn-lg{padding:13px 26px;font-size:16px}
.burger{
  display:none;position:relative;width:44px;height:44px;
  background:transparent;border:1px solid var(--line);border-radius:var(--r-btn);
}
.burger span{position:absolute;left:12px;right:12px;height:2px;border-radius:2px;background:var(--ink);transition:transform .25s var(--ease),opacity .2s var(--ease)}
.burger span:nth-child(1){top:15px}
.burger span:nth-child(2){top:21px}
.burger span:nth-child(3){top:27px}
.burger.is-on span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.burger.is-on span:nth-child(2){opacity:0}
.burger.is-on span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.mobile-panel{display:none}

/* ---------- 区块 ---------- */
.section{padding:96px 0}
.section-tight{padding-top:56px}
.sec-head{margin-bottom:30px}
.sec-head h2{font-size:clamp(24px,3vw,34px);letter-spacing:-.01em}
.sec-sub{margin:10px 0 0;color:var(--text-2);font-size:16px;max-width:640px}

/* ---------- 页头 ---------- */
.page-hero{background:var(--band);border-bottom:1px solid var(--line-2);padding:30px 0 66px;text-align:center}
.breadcrumb-x{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--text-3)}
.breadcrumb-x a{color:var(--text-3)}
.breadcrumb-x a:hover{color:var(--ink)}
.breadcrumb-x .cur{color:var(--ink-soft);font-weight:600}
.page-hero h1{
  margin:16px auto 16px;max-width:760px;
  font-size:clamp(28px,4vw,44px);line-height:1.2;font-weight:800;letter-spacing:-.02em;
  animation:fadeUp .45s var(--ease) both;
}
.hero-lede{margin:0 auto;max-width:640px;font-size:17px;color:var(--text-2);animation:fadeUp .45s var(--ease) .07s both}
.page-hero .rule{width:64px;height:2px;border-radius:2px;background:var(--acc);margin:30px auto 0}
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}

/* ---------- 筛选 ---------- */
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.chip{
  padding:8px 16px;border:1px solid transparent;border-radius:var(--r-badge);
  background:#EDEAE2;color:var(--ink);font-size:14px;font-weight:500;
  transition:background .2s var(--ease),color .2s var(--ease),transform .15s var(--ease);
}
.chip:hover{background:#E2DDD1}
.chip:active{transform:scale(.98)}
.chip.is-active{background:var(--ink);color:#fff}

/* ---------- 卡片网格 ---------- */
.verify-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.verify-card{
  display:flex;flex-direction:column;
  padding:26px 26px 22px;
  background:var(--paper);border:1px solid var(--line);border-radius:var(--r-card);
  transition:border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.verify-card:hover{transform:translateY(-4px);border-color:rgba(20,73,74,.35);box-shadow:var(--sh-h)}
.v-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
.v-num{font-family:var(--serif);font-size:18px;letter-spacing:.08em;color:var(--ink-soft)}
.badge-x{display:inline-block;padding:4px 10px;border-radius:var(--r-badge);background:rgba(20,73,74,.1);color:var(--ink);font-size:12.5px;letter-spacing:.06em}
.verify-card h3{margin-bottom:10px;font-size:20px;font-weight:600}
.verify-card p{margin:0 0 18px;color:var(--text-2);font-size:15.5px}
.text-link{display:inline-flex;align-items:center;gap:4px;margin-top:auto;font-size:15px;font-weight:600;color:var(--ink-soft);transition:color .2s var(--ease)}
.text-link:hover{color:var(--acc)}
.text-link .arw{transition:transform .2s var(--ease)}
.text-link:hover .arw{transform:translateX(4px)}
.empty-state{margin-top:24px;padding:48px 24px;border:1px dashed #CFC9BC;border-radius:var(--r-card);text-align:center;color:var(--text-2)}
.empty-state strong{display:block;margin-bottom:6px;font-size:16px;color:var(--ink-deep)}
.empty-state span{font-size:14px}

/* ---------- 对照区块 ---------- */
.section-compare{background:var(--paper);border-top:1px solid var(--line-2);border-bottom:1px solid var(--line-2)}
.compare-media{margin-bottom:44px;border-radius:var(--r-lg);overflow:hidden;background:#EFEDE7}
.compare-media img{width:100%;aspect-ratio:16/7;object-fit:cover}
.compare-cols{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
.compare-col h3{font-size:20px;margin-bottom:16px}
.compare-col h3 span{display:inline-block;margin-right:10px;padding:2px 8px;border-radius:var(--r-badge);font-size:12.5px;letter-spacing:.06em}
.tag-ok{background:rgba(63,122,90,.12);color:var(--ok)}
.tag-warn{background:rgba(194,86,47,.12);color:var(--acc)}
.check-list li{position:relative;padding-left:20px;margin-bottom:12px;font-size:15.5px;color:var(--text-2)}
.check-list li::before{content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:2px;background:var(--ink-soft)}
.check-list.warn li::before{background:var(--acc)}

/* ---------- 数据条 ---------- */
.stat-strip{background:var(--band);border-top:1px solid var(--line-2);border-bottom:1px solid var(--line-2)}
.stat-grid{display:grid;grid-template-columns:1.15fr 1fr 1fr;gap:24px}
.stat-cell{padding:26px;background:var(--paper);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh)}
.stat-num{font-family:var(--serif);font-size:clamp(30px,4vw,44px);font-weight:700;letter-spacing:-.02em;color:var(--ink);line-height:1.1}
.stat-label{margin-top:8px;font-size:15px;color:var(--text-2)}
.stat-cell p{margin:10px 0 0;font-size:14px;color:var(--text-3)}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line)}
.faq-item{padding:26px 0;border-bottom:1px solid var(--line)}
.faq-item h3{margin-bottom:10px;font-size:17px;font-weight:700;color:var(--ink-deep)}
.faq-item p{margin:0;font-size:15.5px;color:var(--text-2)}
.back-row{padding:8px 0 64px}
.back-row .text-link{font-size:15px}

/* ---------- CTA ---------- */
.cta-bar{background:var(--ink-deep);color:#fff;border-bottom:1px solid rgba(255,255,255,.12)}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:28px;padding:38px 0}
.cta-bar h2{margin-bottom:6px;font-size:clamp(20px,2.4vw,26px);color:#fff}
.cta-bar p{margin:0;font-size:15px;color:rgba(255,255,255,.72)}

/* ---------- 页脚 ---------- */
.site-footer{padding-top:64px;background:var(--ink-deep);color:rgba(255,255,255,.75)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.footer-brand .brand-text em,.footer-brand .brand-text i{color:#fff}
.footer-brand p{margin:18px 0 0;max-width:340px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.7)}
.footer-col h4{margin-bottom:16px;font-size:14px;font-weight:600;letter-spacing:.06em;color:#8FC4BE}
.footer-col a{display:block;padding:6px 0;font-size:14px;color:rgba(255,255,255,.75);transition:color .2s var(--ease),transform .2s var(--ease)}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-bottom{display:flex;justify-content:space-between;gap:12px;padding:20px 0 30px;border-top:1px solid rgba(255,255,255,.14);font-size:13px;color:rgba(255,255,255,.6)}

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

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .container-x,.container-narrow{padding-left:24px;padding-right:24px}
  .section{padding:72px 0}
  .stat-grid{grid-template-columns:1fr 1fr;gap:20px}
  .stat-cell:first-child{grid-column:1 / -1}
}
@media (max-width:991px){
  .container-x,.container-narrow{padding-left:24px;padding-right:24px}
  .section{padding:64px 0}
  .nav-desktop{display:none}
  .burger{display:block}
  .header-inner{height:60px}
  .mobile-panel{
    position:fixed;left:0;right:0;top:60px;bottom:0;z-index:70;
    flex-direction:column;gap:4px;padding:22px 24px 44px;
    background:#fff;overflow-y:auto;
    border-top:1px solid var(--line-2);
  }
  .mobile-panel.is-open{display:flex}
  .mobile-panel a{padding:15px 4px;font-size:17px;font-weight:600;color:var(--text);border-bottom:1px solid var(--line-2)}
  .mobile-panel a.active{color:var(--ink)}
  .mobile-panel .m-cta{margin-top:20px;border-bottom:none;border-radius:var(--r-btn);background:var(--acc);color:#fff;text-align:center}
  .compare-cols{grid-template-columns:1fr;gap:28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .container-x,.container-narrow{padding-left:18px;padding-right:18px}
  .section{padding:56px 0}
  .page-hero{padding:24px 0 52px}
  .verify-grid{grid-template-columns:1fr;gap:18px}
  .stat-grid{grid-template-columns:1fr}
  .stat-cell:first-child{grid-column:auto}
  .cta-inner{flex-direction:column;align-items:flex-start;padding:32px 0}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:36px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .back-row{padding-bottom:48px}
}
@media (max-width:575px){
  body{font-size:16px}
  .verify-card{padding:22px 20px 20px}
  .brand-text{font-size:17px}
}
@media (min-width:992px){
  .mobile-panel{display:none!important}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}