/* roulang page: index */
:root{
  --deep:#05171E;
  --deep-2:#0A2530;
  --deep-3:#0F3240;
  --line-dark:#1D4655;
  --glass:rgba(255,255,255,0.06);
  --glass-line:rgba(255,255,255,0.12);
  --cyan:#1FC8B4;
  --cyan-deep:#12897C;
  --blue:#6F9BFF;
  --amber:#F5B863;
  --text:#EAF4F6;
  --text-dim:#9FB8C0;
  --light-bg:#F6F9FA;
  --card:#FFFFFF;
  --ltext:#0B2A33;
  --ldim:#4A6672;
  --lline:#E7EFF1;
  --danger:#E4705E;
  --r-sm:10px;
  --r-md:16px;
  --r-lg:22px;
  --shadow-dark:0 18px 48px rgba(0,0,0,0.45);
  --shadow-light:0 8px 24px rgba(11,42,51,0.08);
  --max:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  background:var(--deep);
  color:var(--text);
  font-size:16px;
  line-height:1.85;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button{font:inherit;cursor:pointer;color:inherit;}
input{font:inherit;}
ul,ol{margin:0;padding:0;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--amber);outline-offset:2px;}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px;}
.section{padding:96px 0;scroll-margin-top:88px;}
.sec-head{max-width:740px;margin-bottom:44px;}
.sec-head h2{font-size:clamp(24px,3vw,32px);line-height:1.28;font-weight:700;letter-spacing:-0.3px;}
.sec-head p{margin-top:12px;color:var(--text-dim);font-size:15px;}
.sec-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;}

/* ===== Header / Nav ===== */
.site-header{
  position:sticky;top:0;z-index:120;
  background:#FFFFFF;
  border-bottom:1px solid var(--lline);
  transition:box-shadow .2s ease-out;
}
.site-header.scrolled{box-shadow:0 2px 10px rgba(11,42,51,.06);}
.header-inner{display:flex;align-items:center;gap:20px;height:68px;}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{
  width:32px;height:32px;border-radius:10px;
  background:linear-gradient(135deg,#1FC8B4,#12897C);
  display:grid;place-items:center;
  box-shadow:0 4px 12px rgba(31,200,180,.28);
  flex:0 0 auto;
}
.logo-mark svg{width:20px;height:20px;display:block;}
.logo-text{display:flex;flex-direction:column;line-height:1.18;}
.logo-text strong{font-size:16px;font-weight:700;color:var(--ltext);letter-spacing:.2px;}
.logo-text em{font-style:normal;font-size:12px;letter-spacing:.5px;color:var(--ldim);}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:8px;flex:1 1 auto;}
.main-nav a{
  position:relative;
  padding:8px 14px;
  border-radius:999px;
  font-size:15px;
  color:#3A5B66;
  transition:background .18s ease-out,color .18s ease-out;
  white-space:nowrap;
}
.main-nav a:hover{background:rgba(31,200,180,.08);color:var(--cyan-deep);}
.main-nav a.active{color:var(--ltext);font-weight:600;}
.main-nav a.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:-4px;height:2px;
  border-radius:2px;background:var(--cyan);
}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.search-box{
  display:flex;align-items:center;
  height:38px;padding:0 14px;
  background:#F4F7F8;border:1px solid var(--lline);border-radius:999px;
  transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.search-box:focus-within{border-color:var(--cyan);box-shadow:0 0 0 4px rgba(31,200,180,.14);}
.search-box input{
  border:0;background:transparent;outline:none;
  font-size:14px;color:var(--ltext);width:180px;
}
.search-box input::placeholder{color:#8CA5AE;}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:4px;
  width:40px;height:40px;padding:0;
  border:1px solid var(--lline);border-radius:10px;background:#fff;
}
.nav-toggle span{display:block;width:18px;height:2px;background:#33545F;border-radius:2px;margin:0 auto;transition:transform .2s ease-out,opacity .2s ease-out;}
.nav-toggle.active span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle.active span:nth-child(2){opacity:0;}
.nav-toggle.active span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-sm);border:1px solid transparent;
  padding:12px 22px;font-size:15px;font-weight:600;white-space:nowrap;
  transition:transform .18s ease-out,background .18s ease-out,box-shadow .18s ease-out,color .18s ease-out,border-color .18s ease-out;
}
.btn:hover{transform:translateY(-1px);}
.btn:active{transform:translateY(0);}
.btn-primary{background:var(--cyan-deep);color:#fff;box-shadow:0 6px 16px rgba(18,137,124,.28);}
.btn-primary:hover{background:#0F9D8D;}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn-glow{
  background:linear-gradient(120deg,#1FC8B4,#6F9BFF);
  color:#04222A;font-weight:700;
  box-shadow:0 0 24px rgba(31,200,180,.45);
}
.btn-glow:hover{filter:brightness(1.06);box-shadow:0 0 30px rgba(31,200,180,.6);}
.btn-ghost{
  border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.06);
  color:var(--text);
  backdrop-filter:blur(14px);
}
.btn-ghost:hover{background:rgba(255,255,255,.1);}
.btn-ghost-text{background:transparent;color:var(--text);padding:12px 8px;font-weight:600;}
.btn-ghost-text .arrow{transition:transform .18s ease-out;}
.btn-ghost-text:hover .arrow{transform:translateX(3px);}
.btn-outline-light{background:#fff;border-color:var(--lline);color:var(--ltext);}
.btn-outline-light:hover{border-color:var(--cyan);color:var(--cyan-deep);}
.btn-block{width:100%;}

/* ===== Pills & Badges ===== */
.pill{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;line-height:1.7;padding:5px 12px;border-radius:999px;
  background:rgba(31,200,180,.16);color:#7FF0E2;
  border:1px solid rgba(31,200,180,.3);
}
.badge{
  display:inline-flex;align-items:center;
  padding:4px 10px;border-radius:999px;
  font-size:12px;line-height:1.6;font-weight:600;
}
.badge-light{background:#EAF7F5;color:#12897C;}
.badge-dark{background:rgba(31,200,180,.16);color:#7FF0E2;border:1px solid rgba(31,200,180,.28);}
.badge-amber{background:rgba(245,184,99,.16);color:var(--amber);border:1px solid rgba(245,184,99,.3);}

/* ===== Glass card ===== */
.glass-card{
  position:relative;overflow:hidden;
  background:var(--glass);
  border:1px solid var(--glass-line);
  border-radius:20px;
  padding:28px;
  backdrop-filter:blur(14px);
}
.glass-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.55),transparent);
}

/* ===== Hero ===== */
.hero{
  position:relative;
  padding:76px 0 92px;
  background:
    radial-gradient(1100px 520px at 84% -12%,rgba(31,200,180,.16),transparent 62%),
    radial-gradient(820px 480px at -6% 24%,rgba(111,155,255,.12),transparent 58%),
    linear-gradient(180deg,#05171E 0%,#071F29 58%,#05171E 100%);
  scroll-margin-top:88px;
}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center;}
.hero-copy h1{
  font-size:clamp(30px,4.4vw,52px);
  line-height:1.2;
  letter-spacing:-0.5px;
  font-weight:700;
  margin-top:18px;
  color:#fff;
}
.hero-sub{margin-top:18px;font-size:17px;line-height:1.8;color:var(--text-dim);max-width:32em;}
.hero-cta{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:30px;}
.trust-row{display:flex;flex-wrap:wrap;list-style:none;margin-top:38px;}
.trust-row li{padding:0 22px;border-left:1px solid var(--line-dark);}
.trust-row li:first-child{border-left:0;padding-left:0;}
.trust-row strong{display:block;font-size:22px;font-weight:700;color:var(--amber);line-height:1.35;}
.trust-row span{font-size:13px;color:var(--text-dim);}
.hero-visual{position:relative;}
.hero-photo{
  position:relative;overflow:hidden;
  border-radius:24px;
  border:1px solid rgba(255,255,255,.12);
  box-shadow:var(--shadow-dark);
  aspect-ratio:4/3;
}
.hero-photo img{width:100%;height:100%;object-fit:cover;}
.hero-photo::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,23,30,.25),rgba(5,23,30,.84));
}
.hero-photo-content{position:absolute;left:0;right:0;bottom:0;padding:24px;z-index:2;}
.hero-photo-content p{margin-top:10px;font-size:14px;line-height:1.75;color:#CFE3E7;max-width:26em;}
.float-card{
  position:absolute;z-index:3;
  display:flex;flex-direction:column;gap:2px;
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.16);
  border-radius:16px;
  padding:12px 16px;
  backdrop-filter:blur(14px);
  box-shadow:var(--shadow-dark);
  max-width:210px;
}
.float-card strong{font-size:13.5px;color:#fff;font-weight:600;}
.float-card span{font-size:12.5px;color:var(--text-dim);line-height:1.6;}
.float-card-a{top:-18px;left:-18px;}
.float-card-b{bottom:-18px;right:-18px;}

/* ===== Value section ===== */
.value-grid{display:grid;grid-template-columns:7fr 5fr;gap:24px;align-items:stretch;}
.value-main{display:flex;flex-direction:column;justify-content:center;padding:34px;}
.value-main h3{font-size:22px;line-height:1.45;font-weight:700;margin-top:14px;}
.value-main p{margin-top:14px;color:var(--text-dim);font-size:15px;}
.value-side{display:grid;gap:24px;}
.value-small{padding:24px 26px;display:flex;flex-direction:column;gap:8px;justify-content:center;}
.value-small h3{font-size:18px;font-weight:600;}
.value-small p{font-size:14.5px;color:var(--text-dim);line-height:1.8;}
.mark-list{list-style:none;display:grid;gap:12px;margin-top:20px;}
.mark-list li{position:relative;padding-left:20px;font-size:15px;color:var(--text-dim);line-height:1.8;}
.mark-list li::before{
  content:"";position:absolute;left:0;top:.66em;
  width:8px;height:8px;background:var(--cyan);
  transform:rotate(45deg);border-radius:2px;
}

/* ===== Bento features ===== */
.bento{display:grid;grid-template-columns:repeat(6,1fr);gap:24px;}
.bento-a{grid-column:span 3;}
.bento-b{grid-column:span 2;}
.feature-card{
  display:flex;flex-direction:column;gap:12px;
  background:var(--glass);
  border:1px solid var(--glass-line);
  border-radius:20px;
  padding:26px;
  position:relative;overflow:hidden;
  transition:border-color .18s ease-out,transform .18s ease-out,background .18s ease-out;
}
.feature-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.5),transparent);
}
.feature-card:hover{border-color:rgba(31,200,180,.42);transform:translateY(-2px);background:rgba(255,255,255,.08);}
.icon-box{
  width:40px;height:40px;border-radius:12px;
  background:rgba(31,200,180,.14);
  display:grid;place-items:center;
  color:var(--cyan);
  flex:0 0 auto;
}
.icon-box svg{width:20px;height:20px;}
.feature-card h3{font-size:19px;font-weight:600;line-height:1.5;}
.feature-card p{font-size:14.5px;color:var(--text-dim);line-height:1.8;}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--cyan);margin-top:auto;padding-top:6px;
}
.text-link span{transition:transform .18s ease-out;}
.text-link:hover span{transform:translateX(3px);}
.accent-card{
  display:flex;flex-direction:column;justify-content:center;gap:14px;
  background:linear-gradient(140deg,rgba(31,200,180,.2),rgba(111,155,255,.14));
  border:1px solid rgba(31,200,180,.3);
  border-radius:20px;
  padding:28px;
  position:relative;overflow:hidden;
}
.accent-card p{font-size:16px;line-height:1.85;color:#DDEFF1;font-weight:600;}

/* ===== Scene blocks ===== */
.scene{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center;margin-bottom:64px;}
.scene:last-child{margin-bottom:0;}
.scene.rev .scene-media{order:2;}
.scene-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:14px;
  border:1px solid rgba(255,255,255,.1);
  box-shadow:var(--shadow-dark);
}
.scene-body h3{font-size:22px;font-weight:700;line-height:1.45;margin-top:14px;}
.scene-body p{margin-top:12px;color:var(--text-dim);font-size:15px;}

/* ===== Cases ===== */
.case-grid{display:grid;grid-template-columns:7fr 5fr;gap:24px;align-items:stretch;}
.case-main{padding:32px;display:flex;flex-direction:column;gap:16px;justify-content:center;}
.case-main h3{font-size:21px;font-weight:700;line-height:1.5;}
.case-main p{font-size:15px;color:var(--text-dim);line-height:1.85;}
.case-metrics{display:flex;gap:36px;flex-wrap:wrap;margin-top:4px;}
.case-metrics strong{display:block;font-size:26px;font-weight:700;color:var(--amber);line-height:1.3;}
.case-metrics span{font-size:13px;color:var(--text-dim);}
.case-side{display:grid;gap:24px;}
.case-small{padding:24px 26px;display:flex;flex-direction:column;gap:10px;justify-content:center;}
.case-small h3{font-size:17px;font-weight:600;line-height:1.55;}
.case-small p{font-size:14px;color:var(--text-dim);line-height:1.8;}

/* ===== Pricing ===== */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start;}
.price-card{
  display:flex;flex-direction:column;gap:16px;
  border-radius:20px;padding:30px 26px;
  border:1px solid var(--line-dark);
  background:rgba(255,255,255,.03);
  transition:border-color .18s ease-out,transform .18s ease-out;
}
.price-card:hover{border-color:rgba(31,200,180,.36);}
.price-card.featured{
  background:rgba(255,255,255,.08);
  border-color:rgba(31,200,180,.45);
  box-shadow:0 0 0 1px rgba(31,200,180,.18),var(--shadow-dark);
  transform:translateY(-8px);
}
.price-head{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.price-card h3{font-size:19px;font-weight:700;}
.price-desc{font-size:13.5px;color:var(--text-dim);line-height:1.8;}
.price-num{font-size:34px;font-weight:700;color:#fff;line-height:1.2;letter-spacing:-0.5px;}
.price-num small{font-size:14px;font-weight:400;color:var(--text-dim);margin-left:4px;}
.price-list{list-style:none;display:grid;gap:10px;margin-top:2px;}
.price-list li{position:relative;padding-left:20px;font-size:14px;color:var(--text-dim);line-height:1.75;}
.price-list li::before{
  content:"";position:absolute;left:0;top:.66em;
  width:8px;height:8px;background:var(--cyan);transform:rotate(45deg);border-radius:2px;
}
.price-card .btn{margin-top:auto;}

/* ===== News (light) ===== */
.news-section{background:var(--light-bg);color:var(--ltext);}
.news-section .sec-head h2{color:var(--ltext);}
.news-section .sec-head p{color:var(--ldim);}
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.news-card{
  background:var(--card);
  border:1px solid var(--lline);
  border-radius:var(--r-md);
  overflow:hidden;
  display:flex;flex-direction:column;
  transition:transform .18s ease-out,box-shadow .18s ease-out;
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-light);}
.news-thumb{display:block;aspect-ratio:16/9;overflow:hidden;background:#EDF2F4;}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out;}
.news-card:hover .news-thumb img{transform:scale(1.04);}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto;}
.news-body h3{
  font-size:18px;font-weight:600;line-height:1.5;color:var(--ltext);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-body h3 a{transition:color .18s ease-out;}
.news-body h3 a:hover{color:var(--cyan-deep);}
.news-body p{
  font-size:14px;color:var(--ldim);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:#7C949C;padding-top:8px;margin-top:auto;
}
.news-meta a{color:var(--cyan-deep);font-weight:600;display:inline-flex;align-items:center;gap:4px;}
.news-meta a span{transition:transform .18s ease-out;}
.news-meta a:hover span{transform:translateX(3px);}
.empty-state{
  grid-column:1 / -1;
  min-height:220px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;
  background:#FFFFFF;border:1px dashed var(--lline);border-radius:var(--r-md);
  color:var(--ldim);font-size:14px;
}
.empty-state svg{width:28px;height:28px;color:#9DB4BC;}

/* ===== FAQ ===== */
.faq-list{display:grid;gap:12px;max-width:920px;}
.faq-item{
  position:relative;
  background:var(--glass);
  border:1px solid var(--glass-line);
  border-radius:var(--r-md);
  overflow:hidden;
  transition:border-color .18s ease-out,background .18s ease-out;
}
.faq-item:hover{border-color:rgba(31,200,180,.34);}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:none;border:0;
  padding:18px 22px;
  font-size:16px;font-weight:600;color:var(--text);text-align:left;
}
.faq-icon{
  flex:0 0 auto;width:22px;height:22px;border-radius:50%;
  display:grid;place-items:center;
  background:rgba(31,200,180,.16);color:var(--cyan);
  font-size:14px;line-height:1;
  transition:transform .24s ease-out,background .2s ease-out;
}
.faq-item.open .faq-icon{transform:rotate(45deg);background:rgba(31,200,180,.28);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease-out;}
.faq-item.open .faq-a{max-height:400px;}
.faq-a p{
  padding:0 22px 20px;
  font-size:15px;line-height:1.9;color:var(--text-dim);
}
.faq-item.open::after{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;
  border-radius:3px;background:var(--cyan);
}

/* ===== CTA bar ===== */
.cta-bar{
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  background:var(--glass);
  border:1px solid var(--glass-line);
  border-radius:24px;
  padding:36px 40px;
  backdrop-filter:blur(14px);
  position:relative;overflow:hidden;
}
.cta-bar::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.55),transparent);
}
.cta-bar h2{font-size:clamp(20px,2.4vw,26px);font-weight:700;line-height:1.4;}
.cta-bar p{margin-top:10px;font-size:15px;color:var(--text-dim);max-width:36em;}

/* ===== Footer ===== */
.site-footer{background:#04131A;border-top:1px solid rgba(255,255,255,.08);padding:64px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand{display:flex;flex-direction:column;gap:14px;}
.footer-brand .logo-text strong{color:#fff;}
.footer-brand .logo-text em{color:var(--text-dim);}
.footer-brand p{font-size:14px;color:var(--text-dim);line-height:1.8;max-width:22em;}
.footer-col h3{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;letter-spacing:.3px;}
.footer-col ul{list-style:none;display:grid;gap:10px;}
.footer-col a{font-size:14px;color:var(--text-dim);transition:color .18s ease-out,transform .18s ease-out;display:inline-block;}
.footer-col a:hover{color:#fff;transform:translateX(2px);}
.footer-bottom{
  margin-top:48px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.08);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#7C949C;
}
.footer-bottom a{color:#9FB8C0;}
.footer-bottom a:hover{color:#fff;}

/* ===== Responsive ===== */
@media (max-width:1024px){
  .search-box{display:none;}
  .nav-toggle{display:inline-flex;}
  .main-nav{
    position:absolute;top:68px;left:0;right:0;
    display:none;flex-direction:column;align-items:stretch;gap:0;
    background:#fff;padding:10px 16px 16px;
    border-bottom:1px solid var(--lline);
    box-shadow:0 12px 24px rgba(11,42,51,.08);
    margin-left:0;
  }
  .main-nav.open{display:flex;}
  .main-nav a{padding:14px 12px;border-radius:10px;border-left:3px solid transparent;white-space:normal;}
  .main-nav a.active{background:#F2F8F8;border-left-color:var(--cyan);color:var(--ltext);}
  .main-nav a.active::after{display:none;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero{padding:56px 0 68px;}
  .value-grid{grid-template-columns:1fr;}
  .bento{grid-template-columns:repeat(2,1fr);}
  .bento-a,.bento-b{grid-column:span 1;}
  .scene{grid-template-columns:1fr;gap:28px;margin-bottom:48px;}
  .scene.rev .scene-media{order:0;}
  .case-grid{grid-template-columns:1fr;}
  .price-grid{grid-template-columns:1fr;}
  .price-card.featured{transform:none;order:-1;}
  .news-grid{grid-template-columns:1fr;}
  .section{padding:72px 0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:768px){
  .container{padding:0 20px;}
  .header-inner{gap:12px;}
  .logo-text strong{font-size:15px;}
  .logo-text em{font-size:11px;}
  .float-card{display:none;}
  .hero-sub{font-size:15.5px;}
  .hero-cta{gap:12px;}
  .trust-row{margin-top:30px;}
  .trust-row li{padding:0 14px;}
  .trust-row strong{font-size:19px;}
  .sec-head{margin-bottom:32px;}
  .section{padding:56px 0;}
  .bento{grid-template-columns:1fr;}
  .cta-bar{padding:28px 24px;border-radius:20px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .hero-copy h1{font-size:26px;}
  .hero-cta .btn{width:100%;}
  .hero-cta{flex-direction:column;align-items:stretch;}
  .btn-ghost-text{justify-content:center;}
  .trust-row li{flex:1 1 50%;padding:0 0 0 12px;margin-bottom:14px;}
  .trust-row li:nth-child(3){border-left:0;padding-left:0;}
  .case-metrics{gap:24px;}
  .news-body{padding:16px 18px 18px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category1 */
:root{
  --ink-900:#05171E;
  --ink-800:#0A2530;
  --ink-700:#0F3240;
  --ink-line:#1D4655;
  --glass:rgba(255,255,255,.06);
  --glass-line:rgba(255,255,255,.12);
  --teal:#1FC8B4;
  --teal-deep:#12897C;
  --blue:#6F9BFF;
  --amber:#F5B863;
  --d-text:#EAF4F6;
  --d-sub:#9FB8C0;
  --l-bg:#F6F9FA;
  --l-card:#FFFFFF;
  --l-text:#0B2A33;
  --l-sub:#4A6672;
  --l-line:#E7EFF1;
  --danger:#E4705E;
  --r-btn:10px;
  --r-card:16px;
  --r-lg:22px;
  --r-pill:999px;
  --shadow-dark:0 18px 48px rgba(0,0,0,.45);
  --shadow-light:0 8px 24px rgba(11,42,51,.08);
  --shadow-light-lg:0 14px 36px rgba(11,42,51,.12);
  --max:1200px;
  --ease:180ms ease-out;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--l-text);
  background:var(--l-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;transition:color var(--ease),background-color var(--ease),border-color var(--ease),transform var(--ease);}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input{font:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--amber);outline-offset:2px;}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:90;
  background:#fff;
  border-bottom:1px solid var(--l-line);
  transition:box-shadow var(--ease);
}
.site-header.is-scrolled{box-shadow:0 2px 10px rgba(11,42,51,.06);}
.header-inner{display:flex;align-items:center;gap:24px;height:68px;}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{
  width:32px;height:32px;border-radius:10px;flex:0 0 auto;
  background:linear-gradient(135deg,#1FC8B4 0%,#6F9BFF 100%);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 12px rgba(31,200,180,.28);
}
.logo-mark svg{width:20px;height:20px;}
.logo-text{display:flex;flex-direction:column;line-height:1.2;}
.logo-text strong{font-size:16px;font-weight:700;letter-spacing:.2px;color:var(--l-text);}
.logo-text em{font-style:normal;font-size:12px;letter-spacing:.5px;color:var(--l-sub);}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:8px;}
.main-nav a{
  position:relative;
  display:inline-flex;align-items:center;
  padding:8px 14px;border-radius:var(--r-pill);
  font-size:15px;color:var(--l-sub);
}
.main-nav a:hover{background:rgba(31,200,180,.08);color:var(--l-text);}
.main-nav a.active{color:var(--l-text);font-weight:600;}
.main-nav a.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  border-radius:2px;background:var(--teal);
}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto;}
.search-box{position:relative;}
.search-box input{
  width:240px;height:40px;
  padding:0 16px;border-radius:var(--r-pill);
  border:1px solid var(--l-line);background:#F4F7F8;
  font-size:14px;color:var(--l-text);
  transition:border-color var(--ease),box-shadow var(--ease),background-color var(--ease);
}
.search-box input::placeholder{color:#8AA0A9;}
.search-box input:focus{
  outline:none;background:#fff;border-color:var(--teal);
  box-shadow:0 0 0 4px rgba(31,200,180,.16);
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;white-space:nowrap;
  border:1px solid transparent;
  transition:transform var(--ease),box-shadow var(--ease),background-color var(--ease),border-color var(--ease),color var(--ease);
}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn-primary{background:var(--teal-deep);color:#fff;box-shadow:0 6px 16px rgba(18,137,124,.24);}
.btn-primary:hover{background:#0F7A6F;transform:translateY(-1px);}
.btn-ghost-light{background:#fff;color:var(--l-text);border-color:var(--l-line);}
.btn-ghost-light:hover{border-color:var(--teal);color:var(--teal-deep);transform:translateY(-1px);}
.btn-glow{
  background:linear-gradient(135deg,#1FC8B4 0%,#6F9BFF 100%);
  color:#04222A;
  box-shadow:0 0 16px rgba(31,200,180,.45),0 10px 26px rgba(0,0,0,.28);
}
.btn-glow:hover{transform:translateY(-1px);box-shadow:0 0 24px rgba(31,200,180,.6),0 12px 30px rgba(0,0,0,.3);}
.btn-glass{
  background:rgba(255,255,255,.08);color:var(--d-text);
  border-color:rgba(255,255,255,.22);
}
.btn-glass:hover{background:rgba(255,255,255,.14);transform:translateY(-1px);}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--teal-deep);
}
.btn-text .arrow{transition:transform var(--ease);}
.btn-text:hover .arrow{transform:translateX(3px);}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;
  border:1px solid var(--l-line);background:#fff;
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--l-text);}

/* ---------- Category Hero (dark) ---------- */
.cat-hero{
  position:relative;overflow:hidden;
  background:var(--ink-900);
  color:var(--d-text);
  padding:52px 0 64px;
}
.cat-hero-bg{
  position:absolute;inset:0;
  background-size:cover;background-position:center;
  opacity:.5;
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(5,23,30,.96) 0%,rgba(5,23,30,.82) 46%,rgba(10,37,48,.62) 100%);
}
.cat-hero::after{
  content:"";position:absolute;left:50%;bottom:-160px;width:640px;height:320px;
  transform:translateX(-50%);
  background:radial-gradient(closest-side,rgba(31,200,180,.20),transparent 70%);
  pointer-events:none;
}
.cat-hero-inner{
  position:relative;z-index:2;
  display:grid;grid-template-columns:minmax(0,1fr) 372px;
  gap:48px;align-items:center;
}
.breadcrumb{
  display:flex;align-items:center;gap:8px;
  font-size:13px;color:var(--d-sub);margin-bottom:16px;
}
.breadcrumb a{color:var(--d-sub);}
.breadcrumb a:hover{color:var(--teal);}
.breadcrumb .current{color:var(--d-text);}
.breadcrumb span.sep{color:rgba(159,184,192,.55);}
.cat-hero h1{
  font-size:clamp(28px,3.6vw,42px);
  line-height:1.22;letter-spacing:-.5px;font-weight:700;
  max-width:16em;
}
.cat-hero h1 .hl{color:var(--teal);}
.cat-hero-sub{
  margin-top:18px;max-width:34em;
  font-size:16px;line-height:1.85;color:var(--d-sub);
}
.hero-actions{display:flex;align-items:center;gap:16px;margin-top:26px;flex-wrap:wrap;}
.cat-hero-card{
  background:var(--glass);
  border:1px solid var(--glass-line);
  border-radius:var(--r-lg);
  padding:16px;
  box-shadow:var(--shadow-dark);
  position:relative;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
}
.cat-hero-card::before{
  content:"";position:absolute;top:0;left:14px;right:14px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.6),transparent);
}
.cat-hero-card img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:14px;
  border:1px solid rgba(255,255,255,.10);
}
.cat-hero-card ul{margin-top:14px;display:grid;gap:10px;}
.cat-hero-card li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:14px;line-height:1.7;color:var(--d-sub);
}
.cat-hero-card li .dot{
  flex:0 0 auto;width:6px;height:6px;margin-top:9px;border-radius:2px;
  background:var(--teal);
}

/* ---------- Light sections ---------- */
.section{padding:88px 0;}
.section-head{max-width:720px;margin-bottom:40px;}
.section-head h2{
  font-size:clamp(24px,2.6vw,30px);
  line-height:1.3;letter-spacing:-.3px;font-weight:700;
}
.section-head p{margin-top:14px;font-size:15px;color:var(--l-sub);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 12px;border-radius:var(--r-pill);
  background:#EAF7F5;color:var(--teal-deep);
  font-size:12px;font-weight:600;letter-spacing:.3px;
  margin-bottom:16px;
}

/* intro */
.intro-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:56px;align-items:start;}
.intro-text p{color:var(--l-sub);font-size:16px;line-height:1.95;}
.intro-text p + p{margin-top:1em;}
.intro-text strong{color:var(--l-text);font-weight:600;}
.point-list{display:grid;grid-template-columns:1fr 1fr;gap:26px 28px;}
.point-item h3{
  display:flex;align-items:center;gap:8px;
  font-size:16px;font-weight:600;color:var(--l-text);margin-bottom:6px;
}
.point-item h3::before{
  content:"";width:8px;height:8px;border-radius:2px;
  background:var(--teal);flex:0 0 auto;
}
.point-item p{font-size:14px;color:var(--l-sub);line-height:1.8;}
.divider-line{height:1px;background:var(--l-line);margin:0;border:0;}

/* entry list */
.steps-section{background:#fff;border-top:1px solid var(--l-line);border-bottom:1px solid var(--l-line);}
.entry-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
.entry-card{
  position:relative;
  display:flex;gap:18px;
  padding:26px 26px 24px;
  background:var(--l-card);
  border:1px solid var(--l-line);
  border-radius:var(--r-card);
  transition:border-color var(--ease),box-shadow var(--ease),transform var(--ease);
}
.entry-card:hover{border-color:var(--teal);box-shadow:var(--shadow-light);transform:translateY(-2px);}
.entry-num{
  flex:0 0 auto;
  font-family:"Inter","PingFang SC",sans-serif;
  font-size:20px;font-weight:700;line-height:1;
  color:var(--teal-deep);
  padding-top:3px;
  letter-spacing:.5px;
}
.entry-body{min-width:0;}
.entry-body h3{font-size:18px;font-weight:600;line-height:1.5;color:var(--l-text);}
.entry-body p{
  margin-top:8px;font-size:14px;line-height:1.8;color:var(--l-sub);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.entry-arrow{
  position:absolute;right:24px;bottom:22px;
  font-size:15px;font-weight:600;color:var(--teal-deep);
  opacity:0;transform:translateX(-4px);
  transition:opacity var(--ease),transform var(--ease);
}
.entry-card:hover .entry-arrow{opacity:1;transform:translateX(0);}

/* help CTA band */
.help-band{
  margin-top:48px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  padding:30px 34px;border-radius:var(--r-lg);
  background:linear-gradient(120deg,#0A2530 0%,#0F3240 100%);
  color:var(--d-text);
  box-shadow:var(--shadow-dark);
}
.help-band h3{font-size:20px;font-weight:700;line-height:1.4;}
.help-band p{margin-top:8px;font-size:14px;color:var(--d-sub);}
.help-band .btn{flex:0 0 auto;}

/* related */
.related-section{padding-top:0;}
.related-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
.related-card{
  display:flex;align-items:center;gap:18px;
  padding:22px 24px;
  background:#fff;border:1px solid var(--l-line);border-radius:var(--r-card);
  transition:border-color var(--ease),box-shadow var(--ease),transform var(--ease);
}
.related-card:hover{border-color:var(--teal);box-shadow:var(--shadow-light);transform:translateY(-2px);}
.related-thumb{
  width:88px;height:66px;flex:0 0 auto;border-radius:12px;overflow:hidden;
  background:#EDF2F4;
}
.related-thumb img{width:100%;height:100%;object-fit:cover;}
.related-copy h3{font-size:17px;font-weight:600;color:var(--l-text);}
.related-copy p{margin-top:6px;font-size:14px;color:var(--l-sub);line-height:1.75;}
.related-copy .go{margin-top:10px;display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--teal-deep);}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink-900);color:var(--d-sub);padding:64px 0 0;margin-top:0;}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;
  padding-bottom:48px;
}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand .logo-text strong{color:var(--d-text);}
.footer-brand .logo-text em{color:var(--d-sub);}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--d-sub);max-width:22em;}
.footer-col h3{
  font-size:14px;font-weight:600;color:var(--d-text);
  letter-spacing:.4px;margin-bottom:16px;
}
.footer-col ul{display:grid;gap:11px;}
.footer-col a{font-size:14px;color:var(--d-sub);display:inline-block;}
.footer-col a:hover{color:var(--d-text);transform:translateX(2px);}
.footer-bottom{
  border-top:1px solid var(--ink-line);
  padding:22px 0 26px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:13px;color:#7E99A2;flex-wrap:wrap;
}
.footer-bottom a{color:#9FB8C0;}
.footer-bottom a:hover{color:var(--teal);}

/* ---------- Responsive ---------- */
@media (max-width:1280px){
  .cat-hero-inner{grid-template-columns:minmax(0,1fr) 340px;gap:36px;}
}
@media (max-width:1024px){
  .header-inner{height:62px;gap:16px;}
  .search-box{display:none;}
  .main-nav{
    position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    margin:0;padding:8px 16px 16px;
    background:#fff;border-bottom:1px solid var(--l-line);
    box-shadow:0 12px 24px rgba(11,42,51,.08);
    display:none;
  }
  .main-nav.is-open{display:flex;}
  .main-nav a{padding:13px 12px;border-radius:10px;font-size:15px;}
  .main-nav a.active::after{left:12px;right:auto;width:3px;top:14px;bottom:14px;height:auto;border-radius:2px;}
  .nav-toggle{display:flex;}
  .cat-hero{padding:40px 0 52px;}
  .cat-hero-inner{grid-template-columns:1fr;gap:28px;}
  .cat-hero-card{max-width:460px;}
  .section{padding:72px 0;}
  .intro-grid{grid-template-columns:1fr;gap:36px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:768px){
  .container{padding:0 20px;}
  .logo-text strong{font-size:15px;}
  .entry-grid,.related-grid{grid-template-columns:1fr;}
  .help-band{flex-direction:column;align-items:flex-start;gap:20px;padding:26px 24px;}
  .help-band .btn{width:100%;}
  .section{padding:56px 0;}
  .cat-hero-card{backdrop-filter:none;-webkit-backdrop-filter:none;background:rgba(255,255,255,.08);}
  .point-list{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
}
@media (max-width:520px){
  .cat-hero h1{font-size:26px;}
  .cat-hero-sub{font-size:15px;}
  .hero-actions .btn{width:100%;}
  .entry-card{padding:22px 20px;gap:14px;}
  .entry-arrow{display:none;}
  .related-card{flex-direction:column;align-items:flex-start;}
  .related-thumb{width:100%;height:auto;aspect-ratio:16/9;}
  .footer-grid{grid-template-columns:1fr;}
  .logo-text em{font-size:11px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --deep:#05171E;
  --deep-2:#0A2530;
  --deep-3:#0F3240;
  --deep-line:#1D4655;
  --cyan:#1FC8B4;
  --cyan-dark:#12897C;
  --cyan-soft:#EAF7F5;
  --blue:#6F9BFF;
  --amber:#F5B863;
  --ink:#0B2A33;
  --ink-soft:#4A6672;
  --line:#E7EFF1;
  --light:#F6F9FA;
  --card:#FFFFFF;
  --danger:#E4705E;
  --r-sm:10px;
  --r-md:16px;
  --r-lg:22px;
  --shadow-card:0 8px 24px rgba(11,42,51,.08);
  --shadow-hover:0 14px 34px rgba(11,42,51,.12);
  --maxw:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--light);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--cyan-dark);text-decoration:none;}
a:hover{color:#0d6f65;}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.3px;line-height:1.3;}
p{margin:0;}
:focus-visible{outline:2px solid var(--amber);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease-out;
}
.site-header.scrolled{box-shadow:0 2px 10px rgba(11,42,51,.06);}
.header-inner{display:flex;align-items:center;gap:24px;height:68px;}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0;text-decoration:none;}
.logo-mark{
  width:34px;height:34px;border-radius:11px;background:var(--cyan-soft);
  display:grid;place-items:center;flex-shrink:0;
  border:1px solid rgba(18,137,124,.12);
}
.logo-mark svg{width:22px;height:22px;display:block;}
.logo-text{display:flex;flex-direction:column;line-height:1.18;}
.logo-text strong{font-size:16px;font-weight:700;color:var(--ink);letter-spacing:-.2px;}
.logo-text em{font-size:12px;font-style:normal;letter-spacing:.5px;color:var(--ink-soft);}
.main-nav{display:flex;align-items:center;gap:4px;margin-right:auto;}
.main-nav a{
  position:relative;
  display:inline-block;
  padding:8px 14px;
  font-size:15px;
  color:#3A5A64;
  border-radius:999px;
  text-decoration:none;
  transition:background .18s ease-out,color .18s ease-out;
}
.main-nav a:hover{background:rgba(31,200,180,.08);color:var(--ink);}
.main-nav a.active{color:var(--cyan-dark);background:rgba(31,200,180,.08);}
.main-nav a.active::after{
  content:"";position:absolute;left:50%;bottom:0;transform:translateX(-50%);
  width:18px;height:2px;border-radius:2px;background:var(--cyan);
}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto;}
.search-box{display:flex;}
.search-box input{
  width:230px;height:38px;border-radius:999px;
  border:1px solid var(--line);background:#F4F7F8;
  padding:0 18px;font-size:14px;color:var(--ink);
  transition:border-color .18s ease-out,box-shadow .18s ease-out,background .18s ease-out;
}
.search-box input::placeholder{color:#8CA5AD;}
.search-box input:focus{
  outline:none;background:#fff;border-color:var(--cyan);
  box-shadow:0 0 0 4px rgba(31,200,180,.14);
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:background .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .18s ease-out,box-shadow .18s ease-out;
}
.btn-primary{background:var(--cyan-dark);color:#fff;box-shadow:0 6px 18px rgba(18,137,124,.22);}
.btn-primary:hover{background:#15a091;color:#fff;transform:translateY(-2px);box-shadow:0 10px 24px rgba(18,137,124,.28);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan-dark);transform:translateY(-2px);}
.btn-sm{padding:9px 16px;font-size:14px;border-radius:9px;}
.nav-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:10px;
  background:#fff;cursor:pointer;padding:0;place-items:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;margin:2px auto;transition:transform .2s ease-out,opacity .2s ease-out;}

/* ---------- breadcrumb ---------- */
.breadcrumb{font-size:13px;color:var(--ink-soft);padding:20px 0 0;line-height:1.6;}
.breadcrumb a{color:var(--ink-soft);}
.breadcrumb a:hover{color:var(--cyan-dark);}
.breadcrumb .sep{margin:0 8px;color:#B9CBD1;}
.breadcrumb .current{color:var(--ink);}

/* ---------- layout ---------- */
.page-main{padding-bottom:64px;}
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,760px) 300px;
  gap:40px;
  justify-content:space-between;
  align-items:start;
  padding:22px 0 0;
}
.article-main{min-width:0;}

/* ---------- article head ---------- */
.article-head{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:32px 34px;
  box-shadow:var(--shadow-card);
}
.badge{
  display:inline-block;padding:4px 12px;border-radius:999px;
  font-size:12px;font-weight:600;letter-spacing:.2px;
  background:var(--cyan-soft);color:var(--cyan-dark);
}
.article-head h1{
  font-size:clamp(24px,3.1vw,34px);
  line-height:1.35;
  margin:16px 0 0;
  color:var(--ink);
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  margin-top:18px;font-size:13px;color:var(--ink-soft);
}
.article-meta .dot{color:#C3D4D9;}
.article-lede{
  margin-top:18px;padding-left:14px;
  border-left:3px solid var(--amber);
  font-size:16px;color:var(--ink-soft);line-height:1.85;
}

/* ---------- article body ---------- */
.article-body{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:8px 34px 36px;
  margin-top:20px;
  box-shadow:var(--shadow-card);
  overflow-wrap:break-word;
  word-break:break-word;
}
.article-body > *:first-child{margin-top:24px;}
.article-body p{font-size:16px;line-height:1.95;margin:1.1em 0;color:#12323C;}
.article-body h2{
  font-size:22px;line-height:1.5;margin:1.9em 0 .7em;
  padding-left:12px;border-left:3px solid var(--cyan);
  color:var(--ink);scroll-margin-top:92px;
}
.article-body h3{
  font-size:18px;line-height:1.6;margin:1.6em 0 .5em;
  color:var(--ink);scroll-margin-top:92px;
}
.article-body h4{font-size:16px;margin:1.4em 0 .4em;color:var(--ink);}
.article-body strong{font-weight:700;color:#0a2831;}
.article-body a{color:var(--cyan-dark);border-bottom:1px solid rgba(18,137,124,.3);}
.article-body a:hover{border-bottom-color:var(--cyan-dark);}
.article-body ul{list-style:none;margin:1.1em 0;padding:0;}
.article-body ul > li{
  position:relative;padding-left:22px;margin:.5em 0;
  font-size:16px;line-height:1.9;color:#12323C;
}
.article-body ul > li::before{
  content:"";position:absolute;left:2px;top:.78em;
  width:7px;height:7px;border-radius:2px;background:var(--cyan);
}
.article-body ol{list-style:none;counter-reset:step;margin:1.1em 0;padding:0;}
.article-body ol > li{
  position:relative;counter-increment:step;
  padding-left:34px;margin:.6em 0;font-size:16px;line-height:1.9;color:#12323C;
}
.article-body ol > li::before{
  content:counter(step);position:absolute;left:0;top:.34em;
  width:22px;height:22px;border-radius:50%;
  background:var(--cyan-soft);color:var(--cyan-dark);
  font-size:12px;font-weight:700;display:grid;place-items:center;
}
.article-body blockquote{
  margin:1.5em 0;padding:14px 18px;
  background:#fff;border:1px solid var(--line);
  border-left:3px solid var(--amber);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  color:var(--ink-soft);font-size:15px;line-height:1.9;
}
.article-body blockquote p{margin:.4em 0;font-size:15px;color:var(--ink-soft);}
.article-body img{border-radius:14px;margin:1.4em auto;max-width:100%;}
.article-body figure{margin:1.5em 0;}
.article-body figcaption{
  font-size:13px;color:var(--ink-soft);text-align:center;margin-top:10px;
}
.article-body table{width:100%;border-collapse:collapse;margin:1.4em 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(--light);font-weight:600;color:var(--ink);}
.article-body hr{border:none;border-top:1px dashed var(--line);margin:2em 0;}

/* ---------- article foot ---------- */
.article-foot{
  margin-top:24px;padding:22px 26px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  box-shadow:var(--shadow-card);
}
.article-tags{display:flex;flex-wrap:wrap;gap:8px;margin-right:auto;}
.tag{
  display:inline-block;padding:4px 12px;border-radius:999px;
  background:var(--cyan-soft);color:var(--cyan-dark);
  font-size:12px;font-weight:600;
}
.copy-btn{
  display:inline-flex;align-items:center;gap:6px;
  padding:9px 16px;border-radius:9px;
  background:#fff;border:1px solid var(--line);
  font-size:14px;color:var(--ink);cursor:pointer;
  transition:border-color .18s ease-out,color .18s ease-out,transform .18s ease-out;
}
.copy-btn:hover{border-color:var(--cyan);color:var(--cyan-dark);transform:translateY(-2px);}

/* ---------- more guides ---------- */
.more-guides{margin-top:40px;}
.sec-title{font-size:22px;color:var(--ink);}
.sec-sub{font-size:14px;color:var(--ink-soft);margin-top:8px;}
.guide-grid{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:20px;margin-top:20px;
}
.guide-card{
  display:flex;flex-direction:column;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;text-decoration:none;color:inherit;
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.guide-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:rgba(31,200,180,.45);}
.guide-thumb{aspect-ratio:16/9;overflow:hidden;background:#EDF2F4;}
.guide-thumb img{width:100%;height:100%;object-fit:cover;}
.guide-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:8px;}
.guide-body h3{font-size:18px;color:var(--ink);}
.guide-body p{font-size:14px;color:var(--ink-soft);line-height:1.8;}
.link-arrow{font-size:14px;font-weight:600;color:var(--cyan-dark);display:inline-flex;align-items:center;gap:4px;}
.link-arrow .arrow{transition:transform .18s ease-out;display:inline-block;}
.guide-card:hover .arrow,
a:hover .arrow{transform:translateX(3px);}

/* ---------- empty state ---------- */
.empty-state{
  margin-top:20px;padding:56px 24px;text-align:center;
  background:#fff;border:1px dashed var(--line);border-radius:var(--r-lg);
  min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
}
.empty-state .empty-icon{
  width:48px;height:48px;border-radius:14px;background:var(--cyan-soft);
  display:grid;place-items:center;color:var(--cyan-dark);
}
.empty-state p{font-size:14px;color:var(--ink-soft);}

/* ---------- sidebar ---------- */
.sidebar{
  position:sticky;top:88px;
  display:flex;flex-direction:column;gap:20px;
  align-self:start;
}
.side-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:20px 22px;box-shadow:var(--shadow-card);
}
.side-card h2{font-size:15px;color:var(--ink);margin-bottom:14px;letter-spacing:0;display:flex;align-items:center;gap:8px;}
.side-card h2::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--cyan);}
.toc-list{list-style:none;display:grid;gap:2px;}
.toc-list a{
  display:block;padding:7px 10px;font-size:14px;color:var(--ink-soft);
  border-left:2px solid transparent;border-radius:0 8px 8px 0;
  transition:color .18s ease-out,border-color .18s ease-out,background .18s ease-out;
  line-height:1.5;
}
.toc-list a:hover{color:var(--ink);background:#F4F8F9;}
.toc-list a.on{color:var(--ink);border-left-color:var(--cyan);background:#F4F8F9;font-weight:600;}
.toc-list a.lv3{padding-left:22px;font-size:13px;}

.quick-card{
  background:linear-gradient(150deg,var(--deep-2),var(--deep-3));
  border:1px solid rgba(255,255,255,.1);
  color:#EAF4F6;
}
.quick-card h2{color:#EAF4F6;}
.quick-card h2::before{background:var(--cyan);}
.quick-card p{font-size:14px;line-height:1.85;color:#9FB8C0;margin-bottom:16px;}
.quick-card .btn-primary{width:100%;background:linear-gradient(120deg,#1FC8B4,#6F9BFF);color:#04222A;box-shadow:0 10px 24px rgba(31,200,180,.28);}
.quick-card .btn-primary:hover{background:linear-gradient(120deg,#26d6c1,#7fa7ff);color:#04222A;}
.quick-thumb{border-radius:12px;overflow:hidden;margin-bottom:16px;background:#0F3240;}
.quick-thumb img{width:100%;aspect-ratio:4/3;object-fit:cover;}

.hot-list{list-style:none;display:grid;gap:2px;}
.hot-list a{
  display:flex;align-items:flex-start;gap:10px;
  padding:9px 0;font-size:14px;color:var(--ink-soft);
  border-bottom:1px dashed var(--line);line-height:1.6;
  transition:color .18s ease-out;
}
.hot-list li:last-child a{border-bottom:none;}
.hot-list a:hover{color:var(--cyan-dark);}
.hot-list .num{
  flex-shrink:0;width:20px;height:20px;border-radius:6px;
  background:var(--light);color:var(--cyan-dark);
  font-size:12px;font-weight:700;display:grid;place-items:center;margin-top:2px;
}

/* ---------- mobile toc ---------- */
.mobile-toc{
  display:none;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:14px 18px;margin-top:20px;
}
.mobile-toc summary{font-size:15px;font-weight:600;cursor:pointer;color:var(--ink);list-style:none;}
.mobile-toc summary::-webkit-details-marker{display:none;}
.mobile-toc summary::after{content:"＋";float:right;color:var(--cyan-dark);}
.mobile-toc[open] summary::after{content:"－";}
.mobile-toc ul{margin-top:10px;}

/* ---------- cta band ---------- */
.cta-wrap{padding:0 0 72px;}
.cta-band{
  background:linear-gradient(120deg,#0A2530,#0F3240);
  border:1px solid rgba(255,255,255,.1);
  border-radius:24px;
  padding:34px 40px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  box-shadow:0 18px 48px rgba(0,0,0,.24);
}
.cta-band h2{font-size:24px;color:#EAF4F6;}
.cta-band p{font-size:14px;color:#9FB8C0;margin-top:8px;line-height:1.8;}
.cta-band .btn-primary{background:linear-gradient(120deg,#1FC8B4,#6F9BFF);color:#04222A;box-shadow:0 10px 26px rgba(31,200,180,.3);flex-shrink:0;}
.cta-band .btn-primary:hover{background:linear-gradient(120deg,#26d6c1,#7fa7ff);color:#04222A;}

/* ---------- footer ---------- */
.site-footer{background:var(--deep);color:#9FB8C0;padding-top:64px;}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:40px;padding-bottom:48px;
}
.footer-brand .logo-mark{background:rgba(31,200,180,.16);border-color:rgba(31,200,180,.24);}
.footer-brand .logo-mark svg{stroke:#1FC8B4;}
.footer-brand .logo-text strong{color:#EAF4F6;}
.footer-brand .logo-text em{color:#9FB8C0;}
.footer-brand p{font-size:14px;line-height:1.8;margin-top:16px;max-width:280px;color:#9FB8C0;}
.footer-col h3{font-size:15px;color:#EAF4F6;margin-bottom:16px;font-weight:600;letter-spacing:0;}
.footer-col ul{list-style:none;display:grid;gap:10px;}
.footer-col a{font-size:14px;color:#9FB8C0;display:inline-block;transition:color .18s ease-out,transform .18s ease-out;}
.footer-col a:hover{color:#EAF4F6;transform:translateX(2px);}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  padding:20px 0 26px;border-top:1px solid var(--deep-line);
  font-size:13px;color:#7C97A0;
}
.footer-bottom a{color:#9FB8C0;}
.footer-bottom a:hover{color:#EAF4F6;}

/* ---------- responsive ---------- */
@media (max-width:1200px){
  .article-layout{grid-template-columns:minmax(0,1fr) 280px;gap:28px;}
  .search-box input{width:190px;}
}
@media (max-width:1024px){
  .header-inner{gap:16px;}
  .main-nav{
    position:fixed;left:0;right:0;top:68px;
    display:none;flex-direction:column;align-items:stretch;gap:2px;
    padding:14px 20px 20px;background:#fff;
    border-bottom:1px solid var(--line);
    box-shadow:0 14px 28px rgba(11,42,51,.1);
    margin-right:0;
  }
  .main-nav.open{display:flex;}
  .main-nav a{padding:12px 14px;border-radius:10px;font-size:15px;}
  .main-nav a.active::after{display:none;}
  .main-nav a.active{border-left:3px solid var(--cyan);border-radius:0 10px 10px 0;}
  .search-box{display:none;}
  .nav-toggle{display:grid;}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0;}
  .sidebar{display:none;}
  .mobile-toc{display:block;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-band{padding:28px 28px;flex-direction:column;align-items:flex-start;}
}
@media (max-width:768px){
  .container{padding:0 20px;}
  .article-head{padding:26px 22px;}
  .article-body{padding:4px 22px 28px;}
  .article-body h2{font-size:20px;}
  .article-body h3{font-size:17px;}
  .guide-grid{grid-template-columns:1fr;}
  .cta-wrap{padding-bottom:56px;}
  .site-footer{padding-top:52px;}
}
@media (max-width:520px){
  .header-inner{height:62px;gap:10px;}
  .main-nav{top:62px;}
  .logo-mark{width:30px;height:30px;}
  .logo-text strong{font-size:15px;}
  .logo-text em{font-size:11px;letter-spacing:.3px;}
  .btn-sm{padding:8px 12px;font-size:13px;}
  .article-head{padding:22px 18px;border-radius:18px;}
  .article-head h1{font-size:22px;}
  .article-body{padding:2px 18px 24px;border-radius:18px;}
  .article-foot{padding:18px;}
  .article-layout{padding-top:16px;}
  .breadcrumb{font-size:12px;padding-top:14px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .cta-band{padding:24px 20px;border-radius:18px;}
  .cta-band h2{font-size:20px;}
  .side-card{padding:18px;}
}

/* roulang page: category2 */
:root{
  --deep:#05171E;
  --deep-2:#0A2530;
  --deep-3:#0F3240;
  --deep-line:#1D4655;
  --glass:rgba(255,255,255,0.06);
  --glass-line:rgba(255,255,255,0.12);
  --cyan:#1FC8B4;
  --cyan-deep:#12897C;
  --blue:#6F9BFF;
  --amber:#F5B863;
  --text-on-dark:#EAF4F6;
  --text-on-dark-2:#9FB8C0;
  --light-bg:#F6F9FA;
  --card:#FFFFFF;
  --text:#0B2A33;
  --text-2:#4A6672;
  --line:#E7EFF1;
  --danger:#E4705E;
  --r-btn:10px;
  --r-card:16px;
  --r-lg:24px;
  --shadow-dark:0 18px 48px rgba(0,0,0,0.45);
  --shadow-light:0 8px 24px rgba(11,42,51,0.08);
  --max:1200px;
}

*,*::before,*::after{box-sizing:border-box;}

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}

body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--light-bg);
  -webkit-font-smoothing:antialiased;
}

img{max-width:100%;display:block;border-style:none;}
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;}

:focus-visible{outline:2px solid var(--amber);outline-offset:2px;border-radius:6px;}

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

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:#FFFFFF;
  border-bottom:1px solid var(--line);
  transition:box-shadow .18s ease-out;
}
.site-header.scrolled{box-shadow:0 2px 10px rgba(11,42,51,0.06);}
.header-inner{
  display:flex;
  align-items:center;
  gap:20px;
  height:68px;
}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.logo-mark{
  width:32px;height:32px;
  border-radius:10px;
  background:linear-gradient(135deg,#1FC8B4 0%,#7CE0D2 100%);
  display:grid;place-items:center;
  box-shadow:0 4px 12px rgba(31,200,180,0.28);
}
.logo-mark svg{width:20px;height:20px;}
.logo-text{display:flex;flex-direction:column;line-height:1.16;}
.logo-text strong{font-size:15px;font-weight:700;color:var(--text);letter-spacing:.2px;}
.logo-text em{font-size:12px;font-style:normal;letter-spacing:.5px;color:var(--text-2);}

.main-nav{display:flex;align-items:center;gap:4px;margin-left:6px;}
.main-nav a{
  position:relative;
  font-size:15px;
  color:var(--text-2);
  padding:8px 14px;
  border-radius:999px;
  transition:background .18s ease-out,color .18s ease-out;
  white-space:nowrap;
}
.main-nav a:hover{background:rgba(31,200,180,0.09);color:var(--text);}
.main-nav a.active{color:var(--text);font-weight:600;}
.main-nav a.active::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:0;
  height:2px;border-radius:2px;
  background:var(--cyan);
}

.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px;}
.search-box{display:block;}
.search-box input{
  width:236px;height:38px;
  border-radius:999px;
  border:1px solid var(--line);
  background:#F4F7F8;
  padding:0 18px;
  font-size:14px;
  color:var(--text);
  transition:border-color .18s ease-out,box-shadow .18s ease-out,background .18s ease-out;
}
.search-box input::placeholder{color:#8AA3AC;}
.search-box input:focus{
  outline:none;
  background:#FFFFFF;
  border-color:var(--cyan);
  box-shadow:0 0 0 4px rgba(31,200,180,0.14);
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border:1px solid transparent;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  padding:12px 22px;
  cursor:pointer;
  transition:transform .18s ease-out,background .18s ease-out,box-shadow .18s ease-out,color .18s ease-out,border-color .18s ease-out;
  white-space:nowrap;
}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn-primary{
  background:var(--cyan-deep);
  color:#FFFFFF;
  box-shadow:0 6px 16px rgba(18,137,124,0.22);
}
.btn-primary:hover{background:#0F7A6E;transform:translateY(-1px);box-shadow:0 10px 22px rgba(18,137,124,0.28);}
.btn-primary:active{transform:translateY(0);}
.btn-glow{
  background:linear-gradient(120deg,#1FC8B4 0%,#6F9BFF 100%);
  color:#04222A;
  box-shadow:0 0 22px rgba(31,200,180,0.38);
}
.btn-glow:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 0 24px rgba(31,200,180,0.52);}
.btn-ghost-dark{
  background:rgba(255,255,255,0.06);
  border-color:rgba(255,255,255,0.24);
  color:var(--text-on-dark);
}
.btn-ghost-dark:hover{background:rgba(255,255,255,0.12);border-color:rgba(255,255,255,0.4);transform:translateY(-1px);}
.btn-outline-light{
  background:#FFFFFF;
  border-color:var(--line);
  color:var(--text);
}
.btn-outline-light:hover{border-color:var(--cyan);color:var(--cyan-deep);transform:translateY(-1px);}
.btn-text{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:15px;
  font-weight:600;
  color:var(--cyan-deep);
  padding:4px 0;
}
.btn-text .arrow{transition:transform .18s ease-out;}
.btn-text:hover .arrow{transform:translateX(3px);}
.btn-text.on-dark{color:var(--cyan);}

.nav-toggle{
  display:none;
  width:40px;height:40px;
  border:1px solid var(--line);
  border-radius:10px;
  background:#FFFFFF;
  cursor:pointer;
  padding:0;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
}
.nav-toggle span{
  display:block;
  width:18px;height:2px;
  border-radius:2px;
  background:var(--text);
  transition:transform .2s ease-out,opacity .2s ease-out;
}

/* ---------- 面包屑 ---------- */
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-on-dark-2);
  margin-bottom:20px;
}
.crumbs a{color:var(--text-on-dark-2);transition:color .18s ease-out;}
.crumbs a:hover{color:var(--cyan);}
.crumbs .sep{opacity:.55;}
.crumbs .current{color:var(--text-on-dark);}

/* ---------- 分类 Hero ---------- */
.cat-hero{
  position:relative;
  overflow:hidden;
  background:var(--deep);
  color:var(--text-on-dark);
  padding:36px 0 64px;
}
.cat-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url(/assets/images/backpic/back-2.webp);
  background-size:cover;
  background-position:center;
  opacity:.34;
}
.cat-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(100deg,rgba(5,23,30,0.94) 0%,rgba(5,23,30,0.82) 46%,rgba(5,23,30,0.5) 100%);
}
.cat-hero .container{position:relative;z-index:2;}
.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,0.85fr);
  gap:48px;
  align-items:center;
}
.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:.4px;
  padding:5px 14px;
  border-radius:999px;
  background:rgba(31,200,180,0.14);
  border:1px solid rgba(31,200,180,0.32);
  color:var(--cyan);
  margin-bottom:18px;
}
.cat-hero h1{
  font-size:clamp(28px,3.6vw,44px);
  line-height:1.22;
  letter-spacing:-0.5px;
  font-weight:700;
  color:var(--text-on-dark);
}
.cat-hero h1 span{color:var(--cyan);}
.hero-sub{
  margin-top:18px;
  font-size:16px;
  line-height:1.8;
  color:var(--text-on-dark-2);
  max-width:560px;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:16px;
  margin-top:28px;
}
.hero-card{
  background:rgba(255,255,255,0.06);
  border:1px solid rgba(255,255,255,0.12);
  border-radius:20px;
  padding:18px;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-dark);
  position:relative;
}
.hero-card::before{
  content:"";
  position:absolute;
  top:0;left:18px;right:18px;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,0.7),transparent);
}
.hero-card-media{
  border-radius:14px;
  overflow:hidden;
  aspect-ratio:16/9;
  background:var(--deep-2);
}
.hero-card-media img{width:100%;height:100%;object-fit:cover;}
.hero-card-list{margin-top:16px;display:grid;gap:12px;}
.hero-card-list li{
  display:flex;
  gap:10px;
  font-size:14px;
  line-height:1.7;
  color:var(--text-on-dark-2);
}
.hero-card-list li::before{
  content:"";
  flex-shrink:0;
  width:7px;height:7px;
  margin-top:8px;
  border-radius:2px;
  background:var(--cyan);
  transform:rotate(45deg);
}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0;}
.section-tight{padding:72px 0;}
.section-alt{background:#FFFFFF;}
.section-head{max-width:720px;margin-bottom:44px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-block;
  font-size:12px;
  letter-spacing:1.4px;
  color:var(--cyan-deep);
  background:#EAF7F5;
  padding:4px 12px;
  border-radius:999px;
  margin-bottom:14px;
}
.section-head h2{
  font-size:clamp(24px,2.6vw,32px);
  line-height:1.3;
  letter-spacing:-0.3px;
  font-weight:700;
  color:var(--text);
}
.section-head p{
  margin-top:14px;
  font-size:16px;
  color:var(--text-2);
  line-height:1.85;
}

/* ---------- 简介 ---------- */
.intro-lead{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:40px;
  margin-bottom:44px;
}
.intro-lead p{font-size:16px;line-height:1.95;color:var(--text-2);}
.intro-lead p strong{color:var(--text);font-weight:600;}

.point-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:0 48px;
  border-top:1px solid var(--line);
}
.point-item{
  display:flex;
  gap:18px;
  padding:26px 0;
  border-bottom:1px solid var(--line);
}
.point-num{
  flex-shrink:0;
  font-size:13px;
  font-weight:700;
  letter-spacing:.6px;
  color:var(--cyan-deep);
  background:#EAF7F5;
  border-radius:8px;
  width:34px;height:34px;
  display:grid;place-items:center;
}
.point-body h3{font-size:17px;font-weight:600;color:var(--text);margin-bottom:6px;}
.point-body p{font-size:14.5px;line-height:1.8;color:var(--text-2);}

/* ---------- FAQ ---------- */
.faq-list{max-width:900px;margin:0 auto;}
.faq-item{
  background:#FFFFFF;
  border:1px solid var(--line);
  border-radius:14px;
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.faq-item:hover{border-color:#CFE3E5;}
.faq-item.open{border-color:rgba(31,200,180,0.44);box-shadow:0 8px 24px rgba(11,42,51,0.07);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:20px 24px;
  background:none;
  border:0;
  text-align:left;
  font-size:16px;
  font-weight:600;
  color:var(--text);
  cursor:pointer;
  transition:box-shadow .2s ease-out,background .18s ease-out;
}
.faq-item.open .faq-q{
  box-shadow:inset 3px 0 0 var(--cyan);
  background:#FBFEFE;
}
.faq-icon{
  flex-shrink:0;
  width:26px;height:26px;
  display:grid;place-items:center;
  border-radius:50%;
  background:#EAF7F5;
  color:var(--cyan-deep);
  font-size:16px;
  font-weight:600;
  line-height:1;
  transition:background .18s ease-out,transform .18s ease-out;
}
.faq-item.open .faq-icon{background:var(--cyan);color:#04222A;}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s ease-out;
}
.faq-item.open .faq-a{max-height:420px;}
.faq-a-inner{
  padding:0 24px 22px 27px;
  font-size:15px;
  line-height:1.9;
  color:var(--text-2);
}
.faq-a-inner p{margin-bottom:10px;}
.faq-a-inner p:last-child{margin-bottom:0;}

/* ---------- 图文交替 ---------- */
.split{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:56px;
  align-items:center;
  padding:40px 0;
}
.split + .split{border-top:1px solid var(--line);}
.split.reverse .split-media{order:2;}
.split-media{
  border-radius:14px;
  overflow:hidden;
  background:#EDF2F4;
  box-shadow:0 8px 24px rgba(11,42,51,0.08);
  aspect-ratio:4/3;
}
.split-media img{width:100%;height:100%;object-fit:cover;}
.split-tag{
  display:inline-block;
  font-size:12px;
  letter-spacing:.4px;
  padding:4px 12px;
  border-radius:999px;
  background:#EAF7F5;
  color:var(--cyan-deep);
  margin-bottom:14px;
}
.split-body h3{
  font-size:22px;
  line-height:1.4;
  font-weight:700;
  color:var(--text);
  margin-bottom:14px;
}
.split-body p{font-size:15.5px;line-height:1.9;color:var(--text-2);margin-bottom:16px;}
.split-list{display:grid;gap:12px;}
.split-list li{
  position:relative;
  padding-left:20px;
  font-size:15px;
  line-height:1.8;
  color:var(--text-2);
}
.split-list li::before{
  content:"";
  position:absolute;
  left:0;top:10px;
  width:8px;height:8px;
  border-radius:2px;
  background:var(--cyan);
  transform:rotate(45deg);
}

/* ---------- 相关指引 ---------- */
.guide-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.guide-card{
  display:flex;
  flex-direction:column;
  background:#FFFFFF;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.guide-card:hover{
  transform:translateY(-2px);
  box-shadow:0 12px 30px rgba(11,42,51,0.11);
  border-color:rgba(31,200,180,0.4);
}
.guide-media{aspect-ratio:16/9;overflow:hidden;background:#EDF2F4;}
.guide-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out;}
.guide-card:hover .guide-media img{transform:scale(1.03);}
.guide-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1;}
.guide-body h3{font-size:18px;font-weight:600;color:var(--text);margin-bottom:10px;line-height:1.45;}
.guide-body p{
  font-size:14.5px;
  line-height:1.8;
  color:var(--text-2);
  margin-bottom:18px;
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.guide-body .btn-text{margin-top:auto;}

/* ---------- CTA 条 ---------- */
.cta-band{
  position:relative;
  overflow:hidden;
  background:linear-gradient(120deg,#08212B 0%,#0F3240 100%);
  border-radius:var(--r-lg);
  padding:46px 48px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:36px;
  color:var(--text-on-dark);
  box-shadow:0 18px 48px rgba(5,23,30,0.24);
}
.cta-band::before{
  content:"";
  position:absolute;
  right:-80px;top:-100px;
  width:320px;height:320px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(31,200,180,0.22),transparent 68%);
}
.cta-band h2{
  position:relative;
  font-size:clamp(22px,2.4vw,28px);
  line-height:1.35;
  font-weight:700;
  color:var(--text-on-dark);
}
.cta-band p{
  position:relative;
  margin-top:10px;
  font-size:15px;
  color:var(--text-on-dark-2);
  max-width:560px;
}
.cta-band .cta-actions{
  position:relative;
  display:flex;
  gap:14px;
  flex-wrap:wrap;
  flex-shrink:0;
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--deep);
  color:var(--text-on-dark-2);
  padding:72px 0 0;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:52px;
}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand .logo-text strong{color:var(--text-on-dark);}
.footer-brand .logo-text em{color:var(--text-on-dark-2);}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--text-on-dark-2);max-width:260px;}
.footer-col h3{
  font-size:14px;
  font-weight:600;
  color:var(--text-on-dark);
  margin-bottom:18px;
  letter-spacing:.4px;
}
.footer-col ul{display:grid;gap:12px;}
.footer-col a{
  font-size:14px;
  color:var(--text-on-dark-2);
  transition:color .18s ease-out,transform .18s ease-out;
  display:inline-block;
}
.footer-col a:hover{color:var(--text-on-dark);transform:translateX(2px);}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:22px 0;
  border-top:1px solid var(--deep-line);
  font-size:13px;
  color:var(--text-on-dark-2);
}
.footer-bottom a{color:var(--text-on-dark-2);transition:color .18s ease-out;}
.footer-bottom a:hover{color:var(--cyan);}

/* ---------- 响应式 ---------- */
@media (max-width:1280px){
  .hero-grid{gap:36px;}
}

@media (max-width:1024px){
  .header-inner{gap:14px;}
  .search-box{display:none;}
  .main-nav{
    position:absolute;
    top:68px;
    left:0;
    right:0;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:2px;
    padding:12px 16px 18px;
    background:#FFFFFF;
    border-bottom:1px solid var(--line);
    box-shadow:0 12px 24px rgba(11,42,51,0.08);
    margin-left:0;
  }
  .main-nav.open{display:flex;}
  .main-nav a{padding:12px 14px;border-radius:10px;font-size:15px;}
  .main-nav a.active{background:rgba(31,200,180,0.1);}
  .main-nav a.active::after{
    left:0;top:10px;bottom:10px;right:auto;
    width:3px;height:auto;border-radius:2px;
  }
  .nav-toggle{display:flex;}
  .logo-text strong{font-size:15px;}
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .hero-card{max-width:520px;}
  .section{padding:72px 0;}
  .section-tight{padding:56px 0;}
  .split{gap:36px;}
  .guide-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-band{flex-direction:column;align-items:flex-start;padding:38px 32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}

@media (max-width:768px){
  body{font-size:15.5px;}
  .container{padding:0 20px;}
  .cat-hero{padding:28px 0 48px;}
  .cat-hero h1{font-size:26px;letter-spacing:-0.2px;}
  .hero-sub{font-size:15px;}
  .hero-card{backdrop-filter:none;-webkit-backdrop-filter:none;background:rgba(255,255,255,0.08);}
  .section{padding:56px 0;}
  .section-tight{padding:48px 0;}
  .intro-lead{grid-template-columns:1fr;gap:18px;margin-bottom:32px;}
  .point-grid{grid-template-columns:1fr;gap:0;}
  .split{grid-template-columns:1fr;gap:24px;padding:32px 0;}
  .split.reverse .split-media{order:0;}
  .split-media{aspect-ratio:16/10;}
  .split-body h3{font-size:20px;}
  .guide-grid{grid-template-columns:1fr;}
  .cta-band{padding:30px 24px;border-radius:20px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:36px;}
  .footer-brand p{max-width:none;}
  .faq-q{padding:18px 18px;font-size:15.5px;}
  .faq-a-inner{padding:0 18px 20px 21px;font-size:14.5px;}
}

@media (max-width:520px){
  .header-inner{height:62px;gap:10px;}
  .logo-mark{width:28px;height:28px;border-radius:9px;}
  .logo-mark svg{width:18px;height:18px;}
  .logo-text strong{font-size:14px;}
  .logo-text em{font-size:11px;letter-spacing:.3px;}
  .main-nav{top:62px;}
  .btn-sm{padding:8px 14px;font-size:13px;}
  .cat-hero h1{font-size:23px;line-height:1.3;}
  .hero-actions{gap:12px;}
  .hero-actions .btn{width:100%;}
  .hero-actions .btn-text{width:auto;}
  .section-head h2{font-size:22px;}
  .cta-band .cta-actions{width:100%;}
  .cta-band .cta-actions .btn{width:100%;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
}