/* roulang page: index */
:root{
  --brand-600:#1668D6; --brand-700:#1155B4; --brand-500:#3B86E8; --brand-50:#EAF2FE;
  --accent-600:#0E9E9E; --accent-50:#E6F6F6;
  --ink-900:#0E1A2B; --ink-700:#2B3B52; --ink-500:#5C6E86; --ink-300:#9AA9BC;
  --line:#E3EAF3; --page-bg:#F7F9FC; --card:#FFFFFF; --star:#F2A93B;
  --radius-card:16px; --radius-btn:12px;
  --shadow-card:0 1px 2px rgba(14,26,43,.05), 0 12px 28px -16px rgba(14,26,43,.18);
  --shadow-hover:0 2px 4px rgba(14,26,43,.06), 0 20px 36px -18px rgba(14,26,43,.26);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--page-bg);color:var(--ink-700);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;font-variant-numeric:tabular-nums;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700;letter-spacing:-.01em}
[id]{scroll-margin-top:132px}
::selection{background:var(--brand-50);color:var(--brand-700)}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px}

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

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.topbar{display:flex;align-items:center;gap:14px;height:64px}
@media (min-width:1024px){.topbar{height:72px;gap:22px}}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{width:34px;height:34px;border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;
  background:linear-gradient(135deg,var(--brand-600),var(--accent-600));box-shadow:0 6px 14px -8px rgba(22,104,214,.9)}
.logo-text{display:flex;align-items:baseline;gap:6px;font-size:18px;font-weight:700;color:var(--ink-900);white-space:nowrap;letter-spacing:-.01em}
@media (min-width:1024px){.logo-text{font-size:19px}}
.logo-suffix{font-size:11px;font-weight:600;color:var(--brand-700);background:var(--brand-50);border-radius:6px;padding:1px 5px;letter-spacing:0}
.nav-search{position:relative;display:none;flex:1 1 auto;max-width:280px;margin-left:8px}
@media (min-width:900px){.nav-search{display:block}}
.nav-search svg{position:absolute;left:14px;top:50%;transform:translateY(-50%);width:17px;height:17px;color:var(--ink-300);pointer-events:none}
.nav-search input{width:100%;height:40px;border:1px solid var(--line);border-radius:999px;background:#fff;
  padding:0 16px 0 40px;font-size:14px;color:var(--ink-900);transition:border-color .2s,box-shadow .2s}
.nav-search input::placeholder{color:var(--ink-300)}
.nav-search input:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(59,134,232,.16)}
.nav-actions{display:flex;align-items:center;gap:8px;margin-left:auto}
.mobile-toggle{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);background:#fff;color:var(--ink-700);cursor:pointer;transition:.2s}
.mobile-toggle:hover{border-color:var(--brand-500);color:var(--brand-600);background:var(--brand-50)}
@media (min-width:900px){.mobile-toggle{display:none}}

/* channel tabs */
.channel-wrap{border-top:1px solid var(--line);background:#fff}
.channels{display:flex;align-items:center;gap:8px;height:48px;overflow-x:auto;scrollbar-width:none}
.channels::-webkit-scrollbar{display:none}
.channel{flex:0 0 auto;padding:6px 14px;border-radius:999px;border:1px solid transparent;font-size:14px;font-weight:500;
  color:var(--ink-500);white-space:nowrap;transition:color .2s,background-color .2s,border-color .2s}
.channel:hover{color:var(--brand-600);background:var(--brand-50)}
.channel.active{color:var(--brand-600);background:var(--brand-50);border-color:rgba(59,134,232,.25);font-weight:600}
.channel:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}

.mobile-panel{display:none;border-top:1px solid var(--line);background:#fff;padding:10px 0 16px}
.mobile-panel.open{display:block}
.mobile-panel a{display:block;padding:12px 14px;border-radius:10px;font-size:15px;font-weight:500;color:var(--ink-700)}
.mobile-panel a:hover{background:var(--brand-50);color:var(--brand-600)}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 20px;border-radius:var(--radius-btn);
  border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,border-color .18s ease,color .18s ease}
.btn svg{width:16px;height:16px}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:0 10px 20px -12px rgba(22,104,214,.85)}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);box-shadow:0 14px 24px -12px rgba(22,104,214,.95)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink-700)}
.btn-ghost:hover{border-color:var(--brand-500);background:var(--brand-50);color:var(--brand-700)}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:10px}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-600)}
.link-more svg{width:15px;height:15px;transition:transform .18s ease}
.link-more:hover{color:var(--brand-700)}
.link-more:hover svg{transform:translateX(3px)}

/* ---------- Hero ---------- */
.hero{padding:40px 0 48px;background:linear-gradient(180deg,#EDF4FF 0%,rgba(247,249,252,0) 100%)}
.hero-grid{display:grid;gap:36px;align-items:center}
@media (min-width:1024px){.hero{padding:68px 0 76px}.hero-grid{grid-template-columns:1.05fr .95fr;gap:56px}}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:999px;
  background:var(--accent-50);color:var(--accent-600);font-size:13px;font-weight:600;margin-bottom:18px}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--accent-600);display:block}
.hero h1{font-size:30px;line-height:1.28;letter-spacing:-.02em;margin-bottom:16px}
@media (min-width:768px){.hero h1{font-size:42px}}
@media (min-width:1024px){.hero h1{font-size:50px;line-height:1.22}}
.hero-sub{font-size:15.5px;line-height:1.85;color:var(--ink-500);max-width:580px;margin-bottom:24px}
@media (min-width:768px){.hero-sub{font-size:16px}}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
@media (max-width:519px){.hero-actions .btn{flex:1 1 100%}}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:26px;font-size:13px;color:var(--ink-500)}
.hero-meta strong{color:var(--ink-900);font-weight:600}
.hero-visual{position:relative}
.hero-device{position:relative;border-radius:18px;overflow:hidden;background:#fff;border:1px solid var(--line);
  box-shadow:0 28px 56px -28px rgba(14,26,43,.4);aspect-ratio:16/10}
.hero-device img{width:100%;height:100%;object-fit:cover;object-position:center}
.hero-tag{position:absolute;left:16px;bottom:16px;display:inline-flex;align-items:center;gap:8px;padding:8px 14px;
  border-radius:999px;background:rgba(255,255,255,.94);font-size:13px;font-weight:600;color:var(--ink-700);
  border:1px solid var(--line);box-shadow:var(--shadow-card)}
.hero-tag i{width:7px;height:7px;border-radius:50%;background:var(--accent-600);display:block}

/* ---------- Trust bar ---------- */
.trustbar{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.trust-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px 20px;padding:26px 0}
@media (min-width:768px){.trust-grid{grid-template-columns:repeat(4,1fr);gap:24px;padding:30px 0}}
.trust-item{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--ink-700);line-height:1.6}
.trust-icon{flex:0 0 auto;width:26px;height:26px;border-radius:8px;display:flex;align-items:center;justify-content:center;
  background:var(--brand-50);color:var(--brand-600)}
.trust-icon svg{width:14px;height:14px}

/* ---------- Sections ---------- */
.section{padding:52px 0}
@media (min-width:768px){.section{padding:68px 0}}
@media (min-width:1024px){.section{padding:84px 0}}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:30px}
.section-head h2{font-size:24px;line-height:1.35;margin-bottom:8px}
@media (min-width:768px){.section-head h2{font-size:28px}}
.section-head p{font-size:15px;line-height:1.8;color:var(--ink-500);max-width:660px}
.badge{display:inline-flex;align-items:center;height:25px;padding:0 10px;border-radius:999px;
  background:var(--brand-50);color:var(--brand-700);font-size:12px;font-weight:600}
.badge-accent{background:var(--accent-50);color:var(--accent-600)}

/* ---------- Bento ---------- */
.bento{display:grid;gap:20px;grid-template-columns:1fr}
@media (min-width:768px){.bento{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.bento{grid-template-columns:1.5fr 1fr}.bento-main{grid-row:span 2}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.bento-main{overflow:hidden;display:flex;flex-direction:column}
.bento-main figure{margin:0;aspect-ratio:16/10;overflow:hidden;background:var(--brand-50)}
.bento-main figure img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.bento-main:hover figure img{transform:scale(1.02)}
.bento-body{padding:22px 24px 24px}
.bento-body h3{font-size:19px;line-height:1.45;margin-bottom:10px}
.bento-body p{font-size:14.5px;line-height:1.8;color:var(--ink-500)}
.bento-mini{padding:22px 22px 24px;display:flex;flex-direction:column;gap:10px}
.bento-mini .mini-icon{width:38px;height:38px;border-radius:11px;display:flex;align-items:center;justify-content:center;
  background:var(--accent-50);color:var(--accent-600)}
.bento-mini .mini-icon svg{width:19px;height:19px}
.bento-mini h3{font-size:17px;line-height:1.45}
.bento-mini p{font-size:14px;line-height:1.8;color:var(--ink-500)}
.card-hover:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#D5E2F3}

/* ---------- Shots ---------- */
.shots{display:flex;flex-direction:column;gap:18px}
.shot-tabs{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;padding-bottom:2px}
.shot-tabs::-webkit-scrollbar{display:none}
.shot-tab{flex:0 0 auto;height:38px;padding:0 16px;border-radius:999px;border:1px solid var(--line);background:#fff;
  font-size:14px;font-weight:500;color:var(--ink-500);cursor:pointer;transition:.2s}
.shot-tab:hover{border-color:var(--brand-500);color:var(--brand-600);background:var(--brand-50)}
.shot-tab.active{background:var(--brand-600);border-color:var(--brand-600);color:#fff;font-weight:600;
  box-shadow:0 10px 20px -14px rgba(22,104,214,.95)}
.shot-frame{border-radius:16px;overflow:hidden;border:1px solid var(--line);background:var(--brand-50);
  box-shadow:var(--shadow-card);aspect-ratio:16/10}
.shot-frame img{width:100%;height:100%;object-fit:cover;transition:opacity .25s ease}
.shot-caption{font-size:14px;line-height:1.8;color:var(--ink-500)}
.shot-nav{display:flex;align-items:center;justify-content:space-between;gap:16px}
.shot-dots{display:flex;gap:8px}
.shot-dot{width:9px;height:9px;border-radius:50%;border:0;padding:0;background:var(--line);cursor:pointer;transition:.2s}
.shot-dot.active{background:var(--brand-600);width:22px;border-radius:999px}
.shot-arrow{width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:#fff;color:var(--ink-700);
  display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:.2s}
.shot-arrow:hover{border-color:var(--brand-500);background:var(--brand-50);color:var(--brand-600)}
.shot-arrow svg{width:17px;height:17px}
.shot-arrow.prev svg{transform:rotate(180deg)}

/* ---------- Spec cards ---------- */
.spec-grid{display:grid;gap:20px;grid-template-columns:1fr}
@media (min-width:768px){.spec-grid{grid-template-columns:repeat(3,1fr)}}
.spec-card{padding:22px 22px 12px}
.spec-head{display:flex;align-items:center;gap:10px;padding-bottom:14px;border-bottom:1px solid var(--line);margin-bottom:4px}
.spec-head .mini-icon{width:34px;height:34px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  background:var(--brand-50);color:var(--brand-600);font-size:13px;font-weight:700}
.spec-head h3{font-size:16px}
.spec-row{display:flex;align-items:center;justify-content:space-between;gap:14px;min-height:44px;
  border-bottom:1px solid var(--line);font-size:14px;padding:10px 0}
.spec-row:last-child{border-bottom:0}
.spec-label{color:var(--ink-500);flex:0 0 auto}
.spec-value{color:var(--ink-900);font-weight:600;text-align:right}

/* ---------- Reviews ---------- */
.reviews{columns:1;column-gap:20px}
@media (min-width:768px){.reviews{columns:2}}
@media (min-width:1024px){.reviews{columns:3}}
.review{break-inside:avoid;margin:0 0 20px;padding:22px}
.stars{display:flex;gap:3px;color:var(--star);margin-bottom:12px}
.star{width:14px;height:14px}
.star.off{color:var(--ink-300)}
.review-text{font-size:14.5px;line-height:1.85;color:var(--ink-700);margin-bottom:16px}
.review-foot{display:flex;align-items:center;gap:10px}
.avatar{width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700;color:var(--brand-700);background:var(--brand-50);flex:0 0 auto}
.review-name{font-size:14px;font-weight:600;color:var(--ink-900);line-height:1.4}
.review-role{font-size:12px;color:var(--ink-500);line-height:1.4}
.review-date{margin-left:auto;font-size:12px;color:var(--ink-300);white-space:nowrap}

/* ---------- Download ---------- */
.download-card{display:grid;gap:26px;padding:26px;border-radius:20px;background:#fff;border:1px solid var(--line);
  box-shadow:var(--shadow-card)}
@media (min-width:1024px){.download-card{grid-template-columns:1fr 200px;align-items:center;padding:32px;gap:32px}}
.download-buttons{display:grid;gap:12px;grid-template-columns:1fr}
@media (min-width:560px){.download-buttons{grid-template-columns:1fr 1fr}}
.dl-btn{display:flex;align-items:center;gap:12px;min-height:64px;padding:12px 16px;border-radius:12px;border:1px solid var(--line);
  background:#fff;cursor:pointer;text-align:left;transition:.2s;width:100%}
.dl-btn:hover{border-color:var(--brand-500);background:var(--brand-50);transform:translateY(-1px);box-shadow:var(--shadow-card)}
.dl-btn.primary{background:var(--brand-600);border-color:var(--brand-600);color:#fff;box-shadow:0 12px 24px -16px rgba(22,104,214,.95)}
.dl-btn.primary:hover{background:var(--brand-700);border-color:var(--brand-700)}
.dl-badge{width:34px;height:34px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;background:var(--brand-50);color:var(--brand-700);flex:0 0 auto}
.dl-btn.primary .dl-badge{background:rgba(255,255,255,.18);color:#fff}
.dl-text{display:flex;flex-direction:column;line-height:1.35}
.dl-text strong{font-size:14.5px;font-weight:600;color:var(--ink-900)}
.dl-btn.primary .dl-text strong{color:#fff}
.dl-text small{font-size:12.5px;color:var(--ink-500)}
.dl-btn.primary .dl-text small{color:rgba(255,255,255,.82)}
.dl-note{margin-top:14px;font-size:13px;line-height:1.7;color:var(--ink-500);min-height:22px}
.qr-box{display:flex;flex-direction:column;align-items:center;gap:10px;text-align:center}
.qr-code{width:112px;height:112px;border-radius:14px;border:1px solid var(--line);background:#fff;
  display:flex;align-items:center;justify-content:center;color:var(--ink-900);box-shadow:var(--shadow-card)}
.qr-box p{font-size:12.5px;line-height:1.6;color:var(--ink-500)}

/* ---------- Posts ---------- */
.post-grid{display:grid;gap:20px;grid-template-columns:1fr}
@media (min-width:640px){.post-grid{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.post-grid{grid-template-columns:repeat(3,1fr)}}
.post-card{display:flex;flex-direction:column;gap:10px;padding:22px;border-radius:var(--radius-card);background:#fff;
  border:1px solid var(--line);box-shadow:var(--shadow-card);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#D5E2F3}
.post-title{font-size:16.5px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-desc{font-size:14px;line-height:1.75;color:var(--ink-500);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-foot{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:6px;
  font-size:13px;color:var(--ink-500)}
.post-arrow{width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:var(--brand-50);color:var(--brand-600)}
.post-arrow svg{width:14px;height:14px}
.empty-state{grid-column:1/-1;min-height:210px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;
  border:1px dashed var(--line);border-radius:var(--radius-card);background:var(--brand-50);padding:32px;text-align:center}
.empty-state p{font-size:14px;color:var(--ink-500)}
.empty-state a{font-size:14px;font-weight:600;color:var(--brand-600)}
.empty-state a:hover{color:var(--brand-700)}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px}
.faq-item{border:1px solid var(--line);border-radius:14px;background:#fff;overflow:hidden;transition:border-color .2s,box-shadow .2s}
.faq-item+.faq-item{margin-top:12px}
.faq-item.open{border-color:rgba(59,134,232,.4);box-shadow:var(--shadow-card)}
.faq-btn{display:flex;width:100%;align-items:center;justify-content:space-between;gap:16px;min-height:56px;
  padding:16px 20px;border:0;background:none;text-align:left;font-size:15.5px;font-weight:600;color:var(--ink-900);cursor:pointer;transition:background-color .2s}
.faq-btn:hover{background:var(--brand-50)}
.faq-icon{flex:0 0 auto;width:22px;height:22px;color:var(--ink-500);transition:transform .22s ease,color .22s ease}
.faq-item.open .faq-icon{transform:rotate(45deg);color:var(--brand-600)}
.faq-panel{max-height:0;overflow:hidden;transition:max-height .26s ease}
.faq-panel p{padding:0 20px 18px;font-size:14.5px;line-height:1.85;color:var(--ink-500)}

/* ---------- Footer ---------- */
.site-footer{background:#0E1A2B;color:#C6D3E3;margin-top:0}
.footer-top{padding:52px 0 34px}
.footer-grid{display:grid;gap:32px;grid-template-columns:1fr}
@media (min-width:640px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}}
.footer-brand .logo-text{color:#fff}
.footer-brand .logo-suffix{background:rgba(59,134,232,.18);color:#9CC4F7}
.footer-brand p{margin-top:14px;font-size:14px;line-height:1.85;color:#93A5BB;max-width:360px}
.footer-title{font-size:14px;font-weight:600;color:#fff;margin-bottom:14px;letter-spacing:.02em}
.footer-links li+li{margin-top:10px}
.footer-links a{font-size:14px;color:#93A5BB;transition:color .18s ease}
.footer-links a:hover{color:#8FBBF5}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:18px 0 24px;display:flex;flex-wrap:wrap;gap:8px 24px;
  justify-content:space-between;font-size:13px;color:#7C8FA6}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}

/* roulang page: article */
:root {
    --brand-50: #EAF2FE;
    --brand-500: #3B86E8;
    --brand-600: #1668D6;
    --brand-700: #1155B4;
    --accent-50: #E6F6F6;
    --accent-600: #0E9E9E;
    --ink-900: #0E1A2B;
    --ink-700: #2B3B52;
    --ink-500: #5C6E86;
    --ink-300: #9AA9BC;
    --line: #E3EAF3;
    --page-bg: #F7F9FC;
    --card: #FFFFFF;
    --star: #F2A93B;
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-pill: 999px;
    --shadow-card: 0 1px 2px rgba(14, 26, 43, .05), 0 12px 28px -16px rgba(14, 26, 43, .18);
    --shadow-hover: 0 2px 4px rgba(14, 26, 43, .06), 0 20px 36px -18px rgba(14, 26, 43, .26);
    --ease: cubic-bezier(.4, 0, .2, 1);
  }

  *, *::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, sans-serif;
    font-size: 16px;
    line-height: 1.75;
    color: var(--ink-700);
    background: var(--page-bg);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }

  h1, h2, h3, h4 { margin: 0; color: var(--ink-900); font-weight: 700; letter-spacing: -.01em; line-height: 1.3; }
  p { margin: 0; }
  ul, ol { margin: 0; padding: 0; list-style: none; }
  img { max-width: 100%; display: block; }
  a { color: inherit; text-decoration: none; }
  button { font: inherit; color: inherit; }
  input { font: inherit; }
  svg { display: block; }

  :focus-visible { outline: 2px solid var(--brand-500); outline-offset: 2px; border-radius: 4px; }

  .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
  @media (min-width: 768px) { .container { padding: 0 32px; } }

  /* ---------- 顶部导航 ---------- */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 60;
    background: rgba(255, 255, 255, .94);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--line);
  }

  .topbar-inner { display: flex; align-items: center; gap: 14px; height: 64px; }
  @media (min-width: 768px) { .topbar-inner { height: 72px; gap: 24px; } }

  .logo { display: inline-flex; align-items: center; gap: 10px; flex: none; }
  .logo-mark {
    width: 32px; height: 32px; border-radius: 10px;
    background: var(--brand-50); color: var(--brand-600);
    display: inline-flex; align-items: center; justify-content: center; flex: none;
  }
  .logo-text {
    display: inline-flex; align-items: baseline; gap: 6px;
    font-size: 17px; font-weight: 700; color: var(--ink-900); letter-spacing: -.01em;
  }
  @media (min-width: 768px) { .logo-text { font-size: 19px; } }
  .logo-suffix {
    font-size: 11px; font-weight: 600; letter-spacing: 0;
    color: var(--brand-600); background: var(--brand-50);
    border: 1px solid rgba(59, 134, 232, .25);
    padding: 2px 7px; border-radius: var(--radius-pill);
  }

  .search { position: relative; display: none; width: 280px; flex: none; }
  @media (min-width: 900px) { .search { display: block; } }
  .search svg { position: absolute; left: 13px; top: 50%; transform: translateY(-50%); color: var(--ink-300); }
  .search input {
    width: 100%; height: 40px; padding: 0 16px 0 38px;
    border: 1px solid var(--line); border-radius: var(--radius-pill);
    background: var(--page-bg); color: var(--ink-900); font-size: 14px;
    transition: border-color .2s var(--ease), box-shadow .2s var(--ease), background-color .2s var(--ease);
  }
  .search input::placeholder { color: var(--ink-300); }
  .search input:focus {
    outline: none; background: #fff; border-color: var(--brand-500);
    box-shadow: 0 0 0 3px rgba(59, 134, 232, .16);
  }

  .topbar-actions { display: flex; align-items: center; gap: 8px; margin-left: auto; }

  .icon-btn {
    width: 40px; height: 40px; border-radius: 10px;
    display: inline-flex; align-items: center; justify-content: center;
    background: #fff; border: 1px solid var(--line); color: var(--ink-700);
    cursor: pointer; transition: border-color .2s var(--ease), color .2s var(--ease), background-color .2s var(--ease);
  }
  .icon-btn:hover { border-color: var(--brand-500); color: var(--brand-600); background: var(--brand-50); }
  @media (min-width: 900px) { .icon-btn { display: none; } }

  .search-panel { border-bottom: 1px solid var(--line); padding: 12px 0 14px; background: #fff; }
  .search-panel[hidden] { display: none !important; }
  .search-panel .search { display: block; width: 100%; }
  @media (min-width: 900px) { .search-panel { display: none !important; } }

  /* 频道行 */
  .channel-bar { border-top: 1px solid rgba(227, 234, 243, .7); }
  .channel-inner { display: flex; align-items: center; height: 48px; }
  .channels {
    display: flex; align-items: center; gap: 6px;
    overflow-x: auto; scrollbar-width: none; -ms-overflow-style: none;
    width: 100%; padding: 2px 0;
  }
  .channels::-webkit-scrollbar { display: none; }
  .channel {
    flex: none; padding: 7px 15px; border-radius: var(--radius-pill);
    font-size: 14px; font-weight: 500; color: var(--ink-500);
    white-space: nowrap;
    transition: color .18s var(--ease), background-color .18s var(--ease), box-shadow .18s var(--ease);
  }
  .channel:hover { color: var(--brand-600); background: rgba(234, 242, 254, .8); }
  .channel.active {
    color: var(--brand-600); background: var(--brand-50); font-weight: 600;
    box-shadow: inset 0 0 0 1px rgba(59, 134, 232, .25);
  }

  .mobile-menu {
    display: flex; flex-direction: column; gap: 4px;
    padding: 10px 20px 16px; background: #fff; border-top: 1px solid var(--line);
  }
  .mobile-menu[hidden] { display: none !important; }
  .mobile-menu a {
    padding: 11px 12px; border-radius: 10px; font-size: 15px; color: var(--ink-700);
    transition: background-color .18s var(--ease), color .18s var(--ease);
  }
  .mobile-menu a:hover { background: var(--brand-50); color: var(--brand-600); }
  .mobile-menu .btn { margin-top: 6px; }
  @media (min-width: 900px) { .mobile-menu { display: none !important; } }

  /* ---------- 按钮 ---------- */
  .btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    height: 44px; padding: 0 20px; border-radius: var(--radius-md);
    font-size: 15px; font-weight: 600; line-height: 1;
    border: 1px solid transparent; cursor: pointer; white-space: nowrap;
    transition: background-color .2s var(--ease), color .2s var(--ease),
                border-color .2s var(--ease), box-shadow .2s var(--ease), transform .2s var(--ease);
  }
  .btn-sm { height: 38px; padding: 0 16px; font-size: 14px; }
  .btn-primary {
    background: var(--brand-600); color: #fff;
    box-shadow: 0 8px 18px -10px rgba(22, 104, 214, .75);
  }
  .btn-primary:hover { background: var(--brand-700); transform: translateY(-1px); box-shadow: 0 12px 22px -10px rgba(17, 85, 180, .65); }
  .btn-primary:active { transform: translateY(0); }
  .btn-outline { background: #fff; color: var(--ink-700); border-color: var(--line); }
  .btn-outline:hover { border-color: var(--brand-500); color: var(--brand-700); background: var(--brand-50); }
  .btn-light { background: #fff; color: var(--brand-700); border-color: rgba(255, 255, 255, .6); }
  .btn-light:hover { background: var(--brand-50); transform: translateY(-1px); }
  .btn-ghost { background: transparent; color: var(--brand-600); height: auto; padding: 0; }
  .btn-ghost:hover { color: var(--brand-700); }

  /* ---------- 文章头部 ---------- */
  .article-hero {
    position: relative; overflow: hidden;
    padding: 24px 0 42px;
    background: linear-gradient(180deg, #F2F7FF 0%, #F7F9FC 100%);
    border-bottom: 1px solid var(--line);
  }
  .article-hero .wave {
    position: absolute; right: -60px; top: -40px; width: 420px; height: 420px;
    opacity: .5; pointer-events: none; color: var(--brand-500);
  }
  @media (max-width: 899px) { .article-hero .wave { display: none; } }

  .breadcrumb { position: relative; font-size: 13px; color: var(--ink-500); }
  .breadcrumb ol { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
  .breadcrumb li { display: inline-flex; align-items: center; gap: 8px; }
  .breadcrumb li + li::before { content: "/"; color: var(--ink-300); }
  .breadcrumb a { transition: color .18s var(--ease); }
  .breadcrumb a:hover { color: var(--brand-600); }
  .breadcrumb .current { color: var(--ink-700); max-width: 22ch; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  @media (min-width: 768px) { .breadcrumb .current { max-width: 40ch; } }

  .article-head { position: relative; max-width: 800px; margin: 22px 0 0; }

  .badge {
    display: inline-flex; align-items: center; height: 25px; padding: 0 11px;
    border-radius: var(--radius-pill); font-size: 12px; font-weight: 600;
    color: var(--brand-700); background: var(--brand-50);
    border: 1px solid rgba(59, 134, 232, .22);
  }
  .badge-accent { color: var(--accent-600); background: var(--accent-50); border-color: rgba(14, 158, 158, .22); }

  .article-head h1 {
    margin: 16px 0 0; font-size: 27px; line-height: 1.32; letter-spacing: -.015em;
  }
  @media (min-width: 768px) { .article-head h1 { font-size: 34px; } }
  @media (min-width: 1024px) { .article-head h1 { font-size: 38px; } }

  .article-lead {
    margin: 16px 0 0; max-width: 720px;
    font-size: 15px; line-height: 1.85; color: var(--ink-500);
  }
  @media (min-width: 768px) { .article-lead { font-size: 16px; } }

  .meta-row {
    display: flex; flex-wrap: wrap; align-items: center; gap: 10px;
    margin-top: 20px; font-size: 13px; color: var(--ink-500);
  }
  .meta-row .dot { width: 4px; height: 4px; border-radius: 50%; background: var(--ink-300); }
  .meta-row time { font-variant-numeric: tabular-nums; }

  /* ---------- 正文 ---------- */
  .article-main { padding: 44px 0 8px; }
  @media (min-width: 768px) { .article-main { padding: 56px 0 12px; } }

  .article-body {
    max-width: 760px; margin: 0 auto;
    font-size: 15.5px; line-height: 1.85; color: var(--ink-700);
    word-break: break-word;
  }
  @media (min-width: 768px) { .article-body { font-size: 16px; } }

  .article-body > *:first-child { margin-top: 0; }
  .article-body p { margin: 0 0 1.15em; }
  .article-body h2 {
    margin: 2em 0 .75em; font-size: 22px; line-height: 1.4; font-weight: 700;
    color: var(--ink-900); padding-left: 14px; border-left: 4px solid var(--brand-500);
  }
  @media (min-width: 768px) { .article-body h2 { font-size: 24px; } }
  .article-body h3 { margin: 1.7em 0 .6em; font-size: 18px; font-weight: 600; color: var(--ink-900); }
  @media (min-width: 768px) { .article-body h3 { font-size: 19px; } }
  .article-body h4 { margin: 1.5em 0 .5em; font-size: 16px; font-weight: 600; color: var(--ink-900); }
  .article-body ul, .article-body ol { margin: 0 0 1.2em; padding-left: 1.35em; }
  .article-body ul { list-style: disc; }
  .article-body ol { list-style: decimal; }
  .article-body li { margin-bottom: .5em; }
  .article-body li::marker { color: var(--brand-500); }
  .article-body blockquote {
    margin: 1.6em 0; padding: 16px 20px;
    border-left: 3px solid var(--brand-500); background: var(--brand-50);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    color: var(--ink-900);
  }
  .article-body blockquote p:last-child { margin-bottom: 0; }
  .article-body img { width: 100%; height: auto; border-radius: var(--radius-md); margin: 1.4em 0; }
  .article-body figure { margin: 1.6em 0; }
  .article-body figure img { margin: 0; }
  .article-body figcaption { margin-top: 10px; font-size: 13px; color: var(--ink-500); text-align: center; }
  .article-body a { color: var(--brand-600); text-decoration: underline; text-underline-offset: 3px; }
  .article-body a:hover { color: var(--brand-700); }
  .article-body table { width: 100%; border-collapse: collapse; margin: 1.5em 0; font-size: 14px; }
  .article-body th, .article-body td { padding: 11px 13px; text-align: left; border-bottom: 1px solid var(--line); }
  .article-body th { background: var(--brand-50); color: var(--ink-900); font-weight: 600; }
  .article-body code {
    background: var(--brand-50); color: var(--brand-700);
    padding: 2px 6px; border-radius: 6px; font-size: .88em;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  }
  .article-body pre {
    margin: 1.5em 0; padding: 18px; border-radius: var(--radius-md);
    background: #0E1A2B; color: #E3EAF3; overflow-x: auto; font-size: 13.5px; line-height: 1.7;
  }
  .article-body pre code { background: transparent; color: inherit; padding: 0; }
  .article-body hr { border: 0; border-top: 1px solid var(--line); margin: 2.2em 0; }

  /* 空态 */
  .empty-state {
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 12px; min-height: 220px; padding: 32px 22px; text-align: center;
    background: var(--brand-50); border: 1px dashed var(--line); border-radius: var(--radius-lg);
  }
  .empty-state .empty-icon {
    width: 48px; height: 48px; border-radius: 14px; background: #fff;
    display: inline-flex; align-items: center; justify-content: center; color: var(--brand-500);
    border: 1px solid var(--line);
  }
  .empty-state p { font-size: 14px; color: var(--ink-500); }
  .empty-state a { font-size: 14px; font-weight: 600; color: var(--brand-600); }
  .empty-state a:hover { text-decoration: underline; text-underline-offset: 3px; }

  /* 文末操作 */
  .article-foot {
    max-width: 760px; margin: 40px auto 0;
    display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px;
    padding-top: 22px; border-top: 1px solid var(--line);
  }
  .tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
  .tag {
    display: inline-flex; align-items: center; height: 26px; padding: 0 11px;
    border-radius: var(--radius-pill); font-size: 12px; color: var(--ink-500);
    background: #fff; border: 1px solid var(--line);
  }

  /* ---------- 相关推荐 ---------- */
  .related { padding: 56px 0 10px; }
  @media (min-width: 768px) { .related { padding: 68px 0 10px; } }

  .section-head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 12px; margin-bottom: 24px; }
  .section-head h2 { font-size: 22px; }
  @media (min-width: 768px) { .section-head h2 { font-size: 26px; } }
  .section-head p { margin-top: 8px; font-size: 14px; color: var(--ink-500); }

  .rel-grid { display: grid; grid-template-columns: 1fr; gap: 20px; }
  @media (min-width: 640px) { .rel-grid { grid-template-columns: repeat(2, 1fr); } }
  @media (min-width: 1024px) { .rel-grid { grid-template-columns: repeat(3, 1fr); gap: 24px; } }

  .rel-card {
    display: flex; flex-direction: column; overflow: hidden;
    background: var(--card); border: 1px solid var(--line);
    border-radius: var(--radius-lg); box-shadow: var(--shadow-card);
    transition: transform .2s var(--ease), box-shadow .2s var(--ease), border-color .2s var(--ease);
  }
  .rel-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); border-color: rgba(59, 134, 232, .4); }
  .rel-thumb { aspect-ratio: 16 / 10; overflow: hidden; background: var(--brand-50); }
  .rel-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s var(--ease); }
  .rel-card:hover .rel-thumb img { transform: scale(1.03); }
  .rel-body { padding: 18px 20px 20px; display: flex; flex-direction: column; gap: 10px; }
  .rel-body h3 { font-size: 17px; font-weight: 600; line-height: 1.45; }
  .rel-body p { font-size: 14px; line-height: 1.75; color: var(--ink-500); }
  .rel-more { margin-top: auto; display: inline-flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 600; color: var(--brand-600); }
  .rel-card:hover .rel-more svg { transform: translateX(2px); }
  .rel-more svg { transition: transform .2s var(--ease); }

  /* ---------- CTA 横幅 ---------- */
  .cta-wrap { padding: 56px 0 8px; }
  @media (min-width: 768px) { .cta-wrap { padding: 68px 0 8px; } }

  .cta-banner {
    position: relative; overflow: hidden;
    display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
    gap: 24px; padding: 34px 26px; border-radius: 20px;
    background-image: linear-gradient(100deg, rgba(11, 40, 84, .94), rgba(17, 85, 180, .84)), url('/assets/images/backpic/back-3.png');
    background-size: cover; background-position: center;
    box-shadow: var(--shadow-card);
  }
  @media (min-width: 768px) { .cta-banner { padding: 44px 40px; } }
  .cta-banner h2 { color: #fff; font-size: 22px; line-height: 1.4; }
  @media (min-width: 768px) { .cta-banner h2 { font-size: 27px; } }
  .cta-banner p { margin-top: 10px; font-size: 14px; line-height: 1.8; color: rgba(255, 255, 255, .82); max-width: 52ch; }
  .cta-actions { display: flex; flex-wrap: wrap; gap: 12px; }

  /* ---------- FAQ ---------- */
  .faq-section { padding: 56px 0 12px; }
  @media (min-width: 768px) { .faq-section { padding: 68px 0 16px; } }

  .faq-list { display: flex; flex-direction: column; gap: 12px; max-width: 860px; }
  .faq-item {
    background: var(--card); border: 1px solid var(--line);
    border-radius: var(--radius-lg); box-shadow: var(--shadow-card); overflow: hidden;
    transition: border-color .2s var(--ease);
  }
  .faq-item.open { border-color: rgba(59, 134, 232, .38); }
  .faq-q {
    width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px;
    padding: 17px 20px; background: transparent; border: 0; cursor: pointer; text-align: left;
    font-size: 15px; font-weight: 600; color: var(--ink-900);
  }
  @media (min-width: 768px) { .faq-q { font-size: 16px; padding: 18px 24px; } }
  .faq-q:hover { color: var(--brand-700); }
  .faq-icon {
    flex: none; width: 26px; height: 26px; border-radius: 50%;
    display: inline-flex; align-items: center; justify-content: center;
    background: var(--brand-50); color: var(--brand-600);
    transition: transform .22s var(--ease), background-color .22s var(--ease);
  }
  .faq-item.open .faq-icon { transform: rotate(45deg); background: var(--brand-600); color: #fff; }
  .faq-a { display: none; padding: 0 20px 18px; }
  @media (min-width: 768px) { .faq-a { padding: 0 24px 20px; } }
  .faq-item.open .faq-a { display: block; }
  .faq-a p { font-size: 14px; line-height: 1.85; color: var(--ink-500); }

  /* ---------- 页脚 ---------- */
  .site-footer { margin-top: 64px; background: #fff; border-top: 1px solid var(--line); }
  .footer-top { padding: 46px 0 34px; }
  .footer-grid { display: grid; grid-template-columns: 1fr; gap: 32px; }
  @media (min-width: 640px) { .footer-grid { grid-template-columns: repeat(2, 1fr); } }
  @media (min-width: 1024px) { .footer-grid { grid-template-columns: 1.7fr 1fr 1fr 1fr; gap: 40px; } }
  .footer-brand p { margin-top: 16px; max-width: 36ch; font-size: 14px; line-height: 1.85; color: var(--ink-500); }
  .footer-title { font-size: 14px; font-weight: 600; color: var(--ink-900); margin-bottom: 14px; }
  .footer-links li { margin-bottom: 10px; }
  .footer-links a { font-size: 14px; color: var(--ink-500); transition: color .18s var(--ease); }
  .footer-links a:hover { color: var(--brand-600); }
  .footer-bottom {
    display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px;
    padding: 18px 0 26px; border-top: 1px solid var(--line);
    font-size: 13px; color: var(--ink-500);
  }

  @media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
  }

/* roulang page: category1 */
:root{
  --brand-600:#1668D6;
  --brand-700:#1155B4;
  --brand-500:#3B86E8;
  --brand-50:#EAF2FE;
  --accent-600:#0E9E9E;
  --accent-50:#E6F6F6;
  --ink-900:#0E1A2B;
  --ink-700:#2B3B52;
  --ink-500:#5C6E86;
  --ink-300:#9AA9BC;
  --line:#E3EAF3;
  --page:#F7F9FC;
  --card:#FFFFFF;
  --star:#F2A93B;
  --radius-lg:16px;
  --radius-md:12px;
  --radius-sm:10px;
  --shadow-card:0 1px 2px rgba(14,26,43,.05),0 12px 28px -16px rgba(14,26,43,.18);
  --shadow-hover:0 2px 6px rgba(14,26,43,.06),0 20px 36px -18px rgba(14,26,43,.24);
  --shadow-soft:0 1px 2px rgba(14,26,43,.04),0 8px 20px -14px rgba(14,26,43,.16);
  --ease:cubic-bezier(.4,0,.2,1);
}

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

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

body.site-body{
  margin:0;
  padding:112px 0 0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink-700);
  background:var(--page);
  -webkit-font-smoothing:antialiased;
}

body.site-body img{max-width:100%;display:block;}
body.site-body a{color:inherit;text-decoration:none;}
body.site-body button{font-family:inherit;}
body.site-body ul,body.site-body ol{margin:0;padding:0;list-style:none;}
body.site-body h1,body.site-body h2,body.site-body h3,body.site-body h4,body.site-body p{margin:0;}
body.site-body svg{display:block;}

:focus-visible{
  outline:2px solid var(--brand-500);
  outline-offset:2px;
  border-radius:6px;
}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
}

/* ---------- 头部导航 ---------- */
.site-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:80;
  background:rgba(255,255,255,.96);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}

.header-top{
  height:68px;
  display:flex;
  align-items:center;
  gap:24px;
}

.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}

.logo-mark{
  width:34px;
  height:34px;
  border-radius:11px;
  display:flex;
  align-items:center;
  justify-content:center;
  color:#fff;
  background:linear-gradient(135deg,var(--brand-600),var(--accent-600));
  box-shadow:0 6px 14px -8px rgba(17,85,180,.7);
}

.logo-text{
  font-size:19px;
  font-weight:700;
  letter-spacing:-.02em;
  color:var(--ink-900);
  line-height:1.1;
  display:inline-flex;
  align-items:baseline;
  gap:6px;
}

.logo-suffix{
  font-size:11px;
  font-weight:500;
  letter-spacing:.06em;
  color:var(--ink-500);
}

.header-search{
  flex:1;
  max-width:300px;
  margin-left:8px;
}

.search-box{
  display:flex;
  align-items:center;
  gap:8px;
  height:42px;
  padding:0 6px 0 14px;
  border:1px solid var(--line);
  border-radius:999px;
  background:#fff;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}

.search-box:focus-within{
  border-color:var(--brand-500);
  box-shadow:0 0 0 3px rgba(59,134,232,.16);
}

.search-box svg{color:var(--ink-300);flex-shrink:0;}

.search-box input{
  flex:1;
  min-width:0;
  border:0;
  outline:none;
  background:transparent;
  font-size:14px;
  color:var(--ink-900);
}

.search-box input::placeholder{color:var(--ink-300);}

.search-box button{
  border:0;
  height:32px;
  padding:0 14px;
  border-radius:999px;
  background:var(--brand-50);
  color:var(--brand-700);
  font-size:13px;
  font-weight:600;
  cursor:pointer;
  transition:background .2s var(--ease),color .2s var(--ease);
}

.search-box button:hover{background:var(--brand-600);color:#fff;}

.header-actions{
  display:flex;
  align-items:center;
  gap:10px;
  margin-left:auto;
}

.header-search-toggle{
  display:none;
  width:42px;
  height:42px;
  align-items:center;
  justify-content:center;
  border:1px solid var(--line);
  border-radius:999px;
  background:#fff;
  color:var(--ink-700);
  cursor:pointer;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}

.header-search-toggle:hover{border-color:var(--brand-500);color:var(--brand-600);}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 22px;
  border-radius:var(--radius-md);
  font-size:15px;
  font-weight:600;
  letter-spacing:.01em;
  cursor:pointer;
  border:1px solid transparent;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}

.btn-primary{
  background:var(--brand-600);
  color:#fff;
  box-shadow:0 10px 22px -14px rgba(17,85,180,.9);
}

.btn-primary:hover{
  background:var(--brand-700);
  transform:translateY(-1px);
  box-shadow:0 14px 26px -14px rgba(17,85,180,.85);
}

.btn-primary:active{transform:translateY(0);}

.btn-outline{
  background:#fff;
  color:var(--ink-700);
  border-color:var(--line);
}

.btn-outline:hover{
  border-color:var(--brand-500);
  background:var(--brand-50);
  color:var(--brand-700);
}

.btn-ghost{
  background:transparent;
  color:var(--brand-700);
  padding:0 4px;
  height:auto;
}

.btn-ghost .arrow{transition:transform .2s var(--ease);}
.btn-ghost:hover .arrow{transform:translateX(3px);}

.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:var(--radius-sm);}

/* 频道 Tabs */
.channels-wrap{
  border-top:1px solid rgba(227,234,243,.7);
  position:relative;
}

.channels{
  height:44px;
  display:flex;
  align-items:center;
  gap:6px;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
}

.channels::-webkit-scrollbar{display:none;}

.channel{
  flex-shrink:0;
  display:inline-flex;
  align-items:center;
  height:32px;
  padding:0 14px;
  border-radius:999px;
  font-size:14px;
  font-weight:500;
  color:var(--ink-500);
  border:1px solid transparent;
  transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
  white-space:nowrap;
}

.channel:hover{color:var(--brand-700);background:var(--brand-50);}

.channel.active{
  color:var(--brand-700);
  background:var(--brand-50);
  border-color:rgba(59,134,232,.28);
  font-weight:600;
}

.channels-wrap::after{
  content:"";
  position:absolute;
  top:0;
  right:0;
  width:40px;
  height:44px;
  pointer-events:none;
  background:linear-gradient(90deg,rgba(255,255,255,0),rgba(255,255,255,.96));
}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  padding:22px 0 0;
  font-size:13px;
  color:var(--ink-500);
}

.breadcrumb a{color:var(--ink-500);transition:color .2s var(--ease);}
.breadcrumb a:hover{color:var(--brand-600);}
.breadcrumb .sep{color:var(--ink-300);}
.breadcrumb .current{color:var(--ink-700);font-weight:600;}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;
  padding:26px 0 40px;
  background:linear-gradient(180deg,rgba(234,242,254,.85) 0%,rgba(247,249,252,0) 100%);
  overflow:hidden;
}

.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  gap:44px;
  align-items:center;
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:28px;
  padding:0 12px;
  border-radius:999px;
  background:var(--accent-50);
  color:var(--accent-600);
  font-size:12px;
  font-weight:600;
  letter-spacing:.04em;
}

.page-title{
  margin-top:18px;
  font-size:32px;
  line-height:1.28;
  font-weight:700;
  letter-spacing:-.02em;
  color:var(--ink-900);
}

.page-title em{
  font-style:normal;
  color:var(--brand-700);
}

.hero-lead{
  margin-top:16px;
  font-size:16px;
  line-height:1.8;
  color:var(--ink-500);
  max-width:560px;
}

.hero-actions{
  margin-top:26px;
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}

.trust-row{
  margin-top:24px;
  display:flex;
  flex-wrap:wrap;
  gap:10px 22px;
  font-size:13px;
  color:var(--ink-500);
  font-variant-numeric:tabular-nums;
}

.trust-item{display:inline-flex;align-items:center;gap:7px;}
.trust-item svg{color:var(--accent-600);flex-shrink:0;}
.trust-item b{color:var(--ink-900);font-weight:600;}

.hero-visual{
  position:relative;
}

.hero-frame{
  position:relative;
  border-radius:18px;
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:0 24px 48px -30px rgba(14,26,43,.55);
  background:var(--brand-50);
  aspect-ratio:16/11;
}

.hero-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
}

.hero-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(200deg,rgba(22,104,214,.12),rgba(14,158,158,.06) 60%,rgba(14,26,43,.16));
}

.hero-float{
  position:absolute;
  left:-16px;
  bottom:-22px;
  width:min(268px,82%);
  background:#fff;
  border:1px solid var(--line);
  border-radius:14px;
  box-shadow:var(--shadow-hover);
  padding:14px 16px;
}

.hero-float h4{
  font-size:13px;
  font-weight:600;
  color:var(--ink-900);
  letter-spacing:.01em;
}

.hero-float ul{margin-top:10px;display:grid;gap:8px;}

.hero-float li{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:12.5px;
  color:var(--ink-500);
  line-height:1.5;
}

.hero-float li span.dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--brand-500);flex-shrink:0;
}

.hero-float li b{color:var(--ink-900);font-weight:600;font-variant-numeric:tabular-nums;}

/* ---------- 统计条 ---------- */
.stat-strip{
  margin-top:6px;
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:16px;
  padding:22px 24px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-soft);
}

.stat-item{
  padding-left:18px;
  border-left:1px solid var(--line);
}

.stat-item:first-child{border-left:0;padding-left:0;}

.stat-num{
  font-size:26px;
  font-weight:700;
  color:var(--ink-900);
  letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;
  line-height:1.2;
}

.stat-num small{font-size:13px;font-weight:600;color:var(--ink-500);margin-left:4px;}

.stat-label{
  margin-top:6px;
  font-size:13px;
  color:var(--ink-500);
  line-height:1.6;
}

/* ---------- 板块通用 ---------- */
.section{padding:64px 0 0;}

.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:26px;
}

.section-title{
  font-size:26px;
  font-weight:700;
  letter-spacing:-.02em;
  color:var(--ink-900);
  line-height:1.35;
}

.section-sub{
  margin-top:8px;
  font-size:15px;
  color:var(--ink-500);
  line-height:1.7;
  max-width:620px;
}

.section-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--brand-700);
  white-space:nowrap;
  transition:color .2s var(--ease);
}

.section-link svg{transition:transform .2s var(--ease);}
.section-link:hover{color:var(--brand-600);}
.section-link:hover svg{transform:translateX(3px);}

/* ---------- 功能布局 ---------- */
.feature-layout{
  display:grid;
  grid-template-columns:248px minmax(0,1fr);
  gap:26px;
  align-items:start;
}

.filter-panel{
  position:sticky;
  top:132px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);
  padding:20px;
}

.filter-title{
  font-size:13px;
  font-weight:600;
  color:var(--ink-900);
  letter-spacing:.04em;
  padding-bottom:12px;
  border-bottom:1px solid var(--line);
}

.filter-list{margin-top:12px;display:grid;gap:4px;}

.filter-btn{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:8px;
  width:100%;
  min-height:40px;
  padding:8px 12px;
  border:0;
  border-radius:var(--radius-sm);
  background:transparent;
  color:var(--ink-700);
  font-size:14px;
  font-weight:500;
  text-align:left;
  cursor:pointer;
  transition:background .2s var(--ease),color .2s var(--ease);
}

.filter-btn:hover{background:var(--brand-50);color:var(--brand-700);}

.filter-btn.is-active{
  background:var(--brand-50);
  color:var(--brand-700);
  font-weight:600;
  box-shadow:inset 0 0 0 1px rgba(59,134,232,.28);
}

.filter-count{
  font-size:12px;
  color:var(--ink-300);
  font-variant-numeric:tabular-nums;
}

.filter-btn.is-active .filter-count{color:var(--brand-600);}

.filter-note{
  margin-top:18px;
  padding-top:16px;
  border-top:1px solid var(--line);
  font-size:12.5px;
  line-height:1.75;
  color:var(--ink-500);
}

.filter-download{
  margin-top:16px;
  width:100%;
}

.filter-support{
  margin-top:16px;
  display:flex;
  gap:10px;
  padding:12px;
  border-radius:var(--radius-sm);
  background:var(--accent-50);
}

.filter-support svg{color:var(--accent-600);flex-shrink:0;margin-top:2px;}

.filter-support p{font-size:12.5px;line-height:1.7;color:#0b7d7d;}

/* 卡片网格 */
.feature-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
}

.feature-card{
  display:flex;
  flex-direction:column;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);
  overflow:hidden;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}

.feature-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-hover);
  border-color:#D6E3F5;
}

.feature-card[hidden]{display:none;}

.card-cover{
  display:block;
  aspect-ratio:16/10;
  overflow:hidden;
  background:var(--brand-50);
}

.card-cover img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .3s var(--ease);
}

.feature-card:hover .card-cover img{transform:scale(1.03);}

.card-body{
  padding:16px 18px 18px;
  display:flex;
  flex-direction:column;
  gap:10px;
  flex:1;
}

.badge-row{display:flex;flex-wrap:wrap;gap:6px;}

.badge{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 10px;
  border-radius:999px;
  background:var(--brand-50);
  color:var(--brand-700);
  font-size:12px;
  font-weight:600;
  letter-spacing:.02em;
}

.badge-accent{background:var(--accent-50);color:var(--accent-600);}

.badge-plain{background:#F1F4F9;color:var(--ink-500);}

.card-title{
  font-size:17px;
  font-weight:600;
  line-height:1.45;
  color:var(--ink-900);
  letter-spacing:-.01em;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}

.card-desc{
  font-size:13.5px;
  line-height:1.8;
  color:var(--ink-500);
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
}

.card-foot{
  margin-top:auto;
  padding-top:12px;
  border-top:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  font-size:12.5px;
  color:var(--ink-500);
}

.card-link{
  display:inline-flex;
  align-items:center;
  gap:4px;
  font-weight:600;
  color:var(--brand-700);
  white-space:nowrap;
  transition:color .2s var(--ease);
}

.card-link svg{transition:transform .2s var(--ease);}
.card-link:hover{color:var(--brand-600);}
.card-link:hover svg{transform:translateX(3px);}

.grid-empty{
  margin-top:20px;
  display:none;
  border:1px dashed var(--line);
  border-radius:var(--radius-lg);
  background:var(--brand-50);
  padding:38px 20px;
  text-align:center;
}

.grid-empty p{font-size:14px;color:var(--ink-500);}

/* ---------- 场景区 ---------- */
.scene-band{
  margin-top:64px;
  padding:56px 0;
  background:linear-gradient(180deg,#F2F7FE 0%,#F7F9FC 100%);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  position:relative;
  overflow:hidden;
}

.wave-deco{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:64px;
  pointer-events:none;
  opacity:.5;
}

.scene-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
  margin-top:30px;
}

.scene-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-soft);
  padding:24px 22px;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}

.scene-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}

.scene-icon{
  width:42px;
  height:42px;
  border-radius:12px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:var(--brand-50);
  color:var(--brand-600);
  margin-bottom:16px;
}

.scene-card:nth-child(2) .scene-icon{background:var(--accent-50);color:var(--accent-600);}

.scene-card h3{
  font-size:17px;
  font-weight:600;
  color:var(--ink-900);
  line-height:1.5;
}

.scene-card p{
  margin-top:8px;
  font-size:14px;
  line-height:1.8;
  color:var(--ink-500);
}

.scene-card ul{margin-top:14px;display:grid;gap:8px;}

.scene-card li{
  position:relative;
  padding-left:16px;
  font-size:13.5px;
  color:var(--ink-700);
  line-height:1.7;
}

.scene-card li::before{
  content:"";
  position:absolute;
  left:0;
  top:9px;
  width:6px;
  height:6px;
  border-radius:2px;
  background:var(--brand-500);
}

/* ---------- 流程步骤 ---------- */
.steps{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:18px;
  margin-top:30px;
}

.step{
  position:relative;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-soft);
  padding:22px 20px;
}

.step-num{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:30px;
  height:30px;
  border-radius:9px;
  background:var(--brand-600);
  color:#fff;
  font-size:13px;
  font-weight:700;
  font-variant-numeric:tabular-nums;
}

.step h3{
  margin-top:14px;
  font-size:16px;
  font-weight:600;
  color:var(--ink-900);
  line-height:1.5;
}

.step p{
  margin-top:7px;
  font-size:13.5px;
  line-height:1.8;
  color:var(--ink-500);
}

/* ---------- FAQ ---------- */
.faq-wrap{
  margin-top:28px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);
  overflow:hidden;
}

.faq-item + .faq-item{border-top:1px solid var(--line);}

.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:20px 22px;
  border:0;
  background:transparent;
  text-align:left;
  font-size:15.5px;
  font-weight:600;
  color:var(--ink-900);
  cursor:pointer;
  line-height:1.6;
  transition:background .2s var(--ease),color .2s var(--ease);
}

.faq-q:hover{background:#FAFCFF;color:var(--brand-700);}

.faq-sign{
  flex-shrink:0;
  width:26px;
  height:26px;
  border-radius:50%;
  border:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--ink-500);
  transition:transform .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}

.faq-item.is-open .faq-sign{
  transform:rotate(45deg);
  background:var(--brand-50);
  color:var(--brand-700);
  border-color:rgba(59,134,232,.35);
}

.faq-a{
  display:none;
  padding:0 22px 22px;
  font-size:14.5px;
  line-height:1.85;
  color:var(--ink-500);
}

.faq-item.is-open .faq-a{display:block;}

/* ---------- 下载 CTA ---------- */
.download-section{padding:64px 0 72px;}

.download-panel{
  position:relative;
  overflow:hidden;
  border-radius:20px;
  border:1px solid var(--line);
  background:
    radial-gradient(120% 140% at 100% 0%,rgba(14,158,158,.12) 0%,rgba(14,158,158,0) 55%),
    linear-gradient(180deg,#EAF2FE 0%,#FFFFFF 70%);
  box-shadow:var(--shadow-card);
  padding:40px;
}

.download-inner{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,.92fr);
  gap:36px;
  align-items:center;
}

.download-title{
  font-size:26px;
  font-weight:700;
  letter-spacing:-.02em;
  color:var(--ink-900);
  line-height:1.35;
}

.download-desc{
  margin-top:12px;
  font-size:14.5px;
  line-height:1.8;
  color:var(--ink-500);
  max-width:460px;
}

.download-meta{
  margin-top:18px;
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}

.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:26px;
  padding:0 11px;
  border-radius:999px;
  background:#fff;
  border:1px solid var(--line);
  font-size:12.5px;
  color:var(--ink-700);
  font-variant-numeric:tabular-nums;
}

.chip svg{color:var(--accent-600);}

.dl-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:12px;
}

.dl-btn{
  display:flex;
  align-items:center;
  gap:10px;
  min-height:66px;
  padding:12px 16px;
  border-radius:var(--radius-md);
  border:1px solid var(--line);
  background:#fff;
  transition:border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
}

.dl-btn:hover{
  border-color:var(--brand-500);
  transform:translateY(-2px);
  box-shadow:var(--shadow-soft);
}

.dl-btn svg{color:var(--brand-600);flex-shrink:0;}

.dl-btn .dl-name{
  font-size:14px;
  font-weight:600;
  color:var(--ink-900);
  line-height:1.3;
}

.dl-btn .dl-sub{
  font-size:12px;
  color:var(--ink-500);
  font-variant-numeric:tabular-nums;
  line-height:1.4;
}

.dl-btn.primary{
  background:var(--brand-600);
  border-color:var(--brand-600);
  box-shadow:0 12px 24px -16px rgba(17,85,180,.95);
}

.dl-btn.primary svg,.dl-btn.primary .dl-name{color:#fff;}
.dl-btn.primary .dl-sub{color:rgba(255,255,255,.78);}
.dl-btn.primary:hover{background:var(--brand-700);border-color:var(--brand-700);}

/* ---------- 页脚 ---------- */
.site-footer{
  background:#0E1A2B;
  color:#C8D4E4;
  padding:56px 0 0;
}

.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:36px;
  padding-bottom:40px;
}

.footer-brand .logo{margin-bottom:16px;}

.footer-brand .logo-text{color:#fff;}
.footer-brand .logo-suffix{color:#8FA3BD;}

.footer-brand p{
  font-size:13.5px;
  line-height:1.85;
  color:#9DB0C8;
  max-width:360px;
}

.footer-title{
  font-size:13px;
  font-weight:600;
  letter-spacing:.06em;
  color:#fff;
  margin-bottom:16px;
}

.footer-links{display:grid;gap:11px;}

.footer-links a{
  font-size:13.5px;
  color:#9DB0C8;
  transition:color .2s var(--ease);
}

.footer-links a:hover{color:#6FA8F0;}

.footer-bottom{
  border-top:1px solid rgba(227,234,243,.14);
  padding:20px 20px 26px;
  display:flex;
  flex-wrap:wrap;
  gap:10px 24px;
  justify-content:space-between;
  font-size:12.5px;
  color:#7E93AD;
}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .hero-grid{grid-template-columns:1fr;gap:34px;}
  .hero-visual{order:2;}
  .hero-float{position:static;width:100%;margin-top:16px;}
  .feature-layout{grid-template-columns:1fr;}
  .filter-panel{position:static;}
  .filter-list{grid-template-columns:repeat(2,minmax(0,1fr));display:grid;}
  .feature-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .scene-card:last-child{grid-column:1/-1;}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
  .download-inner{grid-template-columns:1fr;gap:26px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .footer-brand{grid-column:1/-1;}
  .header-search{display:none;}
  .header-search-toggle{display:inline-flex;}
  .header-search.is-open{
    display:block;
    position:absolute;
    top:70px;
    left:20px;
    right:20px;
    max-width:none;
    margin:0;
    z-index:90;
    background:#fff;
    padding:10px;
    border:1px solid var(--line);
    border-radius:14px;
    box-shadow:var(--shadow-hover);
  }
}

@media (max-width:767px){
  body.site-body{padding-top:104px;font-size:15px;}
  .header-top{height:60px;gap:12px;}
  .channels-wrap::after{display:none;}
  .logo-text{font-size:17px;}
  .logo-mark{width:30px;height:30px;border-radius:10px;}
  .page-hero{padding:20px 0 30px;}
  .page-title{font-size:27px;}
  .hero-lead{font-size:15px;}
  .stat-strip{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 14px;padding:18px;}
  .stat-item{padding-left:14px;}
  .stat-item:nth-child(odd){border-left:0;padding-left:0;}
  .stat-num{font-size:23px;}
  .section{padding:48px 0 0;}
  .section-title{font-size:22px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .feature-grid{grid-template-columns:1fr;}
  .scene-grid{grid-template-columns:1fr;}
  .scene-card:last-child{grid-column:auto;}
  .steps{grid-template-columns:1fr;}
  .download-section{padding:48px 0 56px;}
  .download-panel{padding:24px 18px;border-radius:16px;}
  .download-title{font-size:22px;}
  .dl-grid{grid-template-columns:1fr;}
  .faq-q{font-size:15px;padding:17px 16px;}
  .faq-a{padding:0 16px 18px;font-size:14px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;padding-bottom:32px;}
  .footer-bottom{flex-direction:column;gap:8px;}
}

@media (max-width:519px){
  .container{padding:0 16px;}
  .header-actions .btn-sm{padding:0 12px;font-size:13px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .filter-list{grid-template-columns:1fr;}
  .breadcrumb{font-size:12px;}
  .stat-strip{grid-template-columns:1fr;}
  .stat-item{border-left:0;padding-left:0;padding-top:14px;border-top:1px solid var(--line);}
  .stat-item:first-child{padding-top:0;border-top:0;}
}

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

/* roulang page: category2 */
:root{
  --brand-50:#EAF2FE;--brand-500:#3B86E8;--brand-600:#1668D6;--brand-700:#1155B4;
  --accent-50:#E6F6F6;--accent-600:#0E9E9E;
  --ink-900:#0E1A2B;--ink-700:#2B3B52;--ink-500:#5C6E86;--ink-300:#9AA9BC;
  --line:#E3EAF3;--page:#F7F9FC;--card:#FFFFFF;--star:#F2A93B;
  --radius-card:16px;--radius-btn:12px;
  --shadow-card:0 1px 2px rgba(14,26,43,.05),0 12px 28px -16px rgba(14,26,43,.18);
  --shadow-lift:0 2px 4px rgba(14,26,43,.06),0 18px 36px -18px rgba(14,26,43,.26);
  --header-h:112px;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--page);color:var(--ink-700);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.75;font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;color:inherit}
input{font:inherit}
h1,h2,h3,h4{margin:0;color:var(--ink-900);line-height:1.3;letter-spacing:-0.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
svg{display:block}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 32px}}
.section{padding:52px 0}
@media (min-width:768px){.section{padding:72px 0}}
@media (min-width:1024px){.section{padding:88px 0}}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:80;background:rgba(255,255,255,.96);backdrop-filter:blur(8px)}
.header-main{border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:14px;height:64px}
@media (min-width:768px){.header-inner{height:72px}}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:10px;background:var(--brand-50);color:var(--brand-600)}
.logo-text{font-size:19px;font-weight:700;color:var(--ink-900);letter-spacing:-.01em;white-space:nowrap}
.logo-suffix{font-size:11px;font-weight:500;color:var(--ink-500);margin-left:6px;letter-spacing:0}
.header-search{display:none;align-items:center;gap:8px;width:280px;height:40px;padding:0 14px;border:1px solid var(--line);border-radius:999px;background:#fff;transition:border-color .2s,box-shadow .2s}
.header-search:focus-within{border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(59,134,232,.16)}
.header-search svg{color:var(--ink-300);flex:0 0 auto}
.header-search input{border:0;outline:0;background:transparent;width:100%;font-size:14px;color:var(--ink-900)}
.header-search input::placeholder{color:var(--ink-300)}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
@media (min-width:1024px){
  .header-search{display:flex;margin-left:auto}
  .header-actions{margin-left:0}
}
.nav-toggle{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--ink-700);transition:background .18s,border-color .18s}
.nav-toggle:hover{border-color:var(--brand-500);background:var(--brand-50);color:var(--brand-700)}
@media (min-width:1024px){.nav-toggle{display:none}}
.mobile-menu{border-top:1px solid var(--line);background:#fff;padding:16px 0 20px}
.mobile-menu[hidden]{display:none}
.mobile-search{display:flex;align-items:center;gap:8px;height:44px;padding:0 14px;border:1px solid var(--line);border-radius:12px;background:#fff;margin-bottom:12px}
.mobile-search:focus-within{border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(59,134,232,.16)}
.mobile-search input{border:0;outline:0;background:transparent;width:100%;font-size:14px;color:var(--ink-900)}
.mobile-search svg{color:var(--ink-300)}
.mobile-links{display:flex;flex-direction:column;gap:2px;margin-bottom:14px}
.mobile-links a{padding:12px 10px;border-radius:10px;font-size:15px;font-weight:500;color:var(--ink-700);transition:background .18s,color .18s}
.mobile-links a:hover,.mobile-links a.active{background:var(--brand-50);color:var(--brand-700)}
.mobile-menu .btn{width:100%}
@media (min-width:1024px){.mobile-menu{display:none !important}}

/* ---------- channels ---------- */
.channels-bar{border-bottom:1px solid var(--line);background:rgba(255,255,255,.98)}
.channels-wrap{position:relative}
.channels{display:flex;align-items:center;gap:6px;height:48px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none}
.channels::-webkit-scrollbar{display:none}
.channel{flex:0 0 auto;padding:7px 14px;border-radius:999px;font-size:14px;font-weight:500;color:var(--ink-500);white-space:nowrap;transition:background .18s,color .18s,box-shadow .18s}
.channel:hover{background:var(--brand-50);color:var(--brand-700)}
.channel.active{background:var(--brand-50);color:var(--brand-700);box-shadow:inset 0 0 0 1px rgba(59,134,232,.28)}
@media (max-width:767px){
  .channels-wrap::after{content:"";position:absolute;right:0;top:0;bottom:0;width:36px;background:linear-gradient(90deg,rgba(255,255,255,0),#fff);pointer-events:none}
}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 20px;border:1px solid transparent;border-radius:var(--radius-btn);font-size:15px;font-weight:600;transition:background .18s,color .18s,border-color .18s,transform .18s,box-shadow .18s}
.btn svg{flex:0 0 auto;transition:transform .18s}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:0 8px 18px -12px rgba(22,104,214,.9)}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);box-shadow:0 12px 24px -12px rgba(17,85,180,.85)}
.btn-primary:active{transform:translateY(0)}
.btn-secondary{background:#fff;border-color:var(--line);color:var(--ink-700)}
.btn-secondary:hover{border-color:var(--brand-500);background:var(--brand-50);color:var(--brand-700)}
.btn-ghost{background:transparent;color:var(--brand-700);min-height:36px;padding:0 2px;font-weight:600}
.btn-ghost:hover svg{transform:translateX(2px)}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px;border-radius:10px}
.btn-light{background:#fff;color:var(--brand-700)}
.btn-light:hover{background:var(--brand-50);transform:translateY(-1px)}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.55);color:#fff}
.btn-outline-light:hover{background:rgba(255,255,255,.14);border-color:#fff}

/* ---------- hero ---------- */
.page-hero{background:linear-gradient(180deg,#EAF2FE 0%,#F7F9FC 76%,#F7F9FC 100%);padding:20px 0 46px}
@media (min-width:768px){.page-hero{padding:26px 0 62px}}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-500);margin-bottom:22px}
.breadcrumb a{color:var(--ink-500);transition:color .18s}
.breadcrumb a:hover{color:var(--brand-600)}
.breadcrumb .sep{color:var(--ink-300)}
.breadcrumb .current{color:var(--ink-700);font-weight:600}
.hero-grid{display:grid;gap:30px}
@media (min-width:1024px){.hero-grid{grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:5px 12px;border-radius:999px;background:#fff;border:1px solid rgba(59,134,232,.3);color:var(--brand-700);font-size:12px;font-weight:600}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--accent-600)}
h1{margin-top:16px;font-size:27px;font-weight:700;line-height:1.32;letter-spacing:-.02em}
@media (min-width:768px){h1{font-size:33px}}
@media (min-width:1024px){h1{font-size:38px}}
.hero-sub{margin-top:14px;font-size:15px;line-height:1.85;color:var(--ink-500);max-width:560px}
@media (min-width:768px){.hero-sub{font-size:16px}}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
@media (max-width:519px){.hero-actions .btn{width:100%}}
.hero-facts{display:grid;grid-template-columns:1fr;gap:14px;margin-top:26px;padding-top:20px;border-top:1px solid rgba(14,26,43,.08)}
@media (min-width:560px){.hero-facts{grid-template-columns:repeat(3,1fr)}}
.hero-facts li{display:flex;flex-direction:column;gap:2px}
.hero-facts strong{font-size:20px;font-weight:700;color:var(--ink-900);letter-spacing:-.01em}
.hero-facts span{font-size:12px;color:var(--ink-500)}
.hero-visual{margin:0;border:1px solid var(--line);border-radius:18px;overflow:hidden;background:#fff;box-shadow:0 2px 6px rgba(14,26,43,.06),0 26px 50px -28px rgba(14,26,43,.42)}
.hero-visual img{width:100%;height:auto;aspect-ratio:16/10;object-fit:cover}
.hero-visual figcaption{padding:12px 16px;font-size:12px;line-height:1.6;color:var(--ink-500);border-top:1px solid var(--line);background:#fff}

/* ---------- section head ---------- */
.section-head{margin-bottom:26px}
.section-kicker{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--brand-600)}
.section-title{margin-top:10px;font-size:23px;font-weight:700}
@media (min-width:768px){.section-title{font-size:27px}}
.section-desc{margin-top:10px;font-size:15px;line-height:1.85;color:var(--ink-500);max-width:660px}

/* ---------- guide layout ---------- */
.guide-layout{display:grid;gap:30px}
@media (min-width:1024px){.guide-layout{grid-template-columns:260px 1fr;gap:44px;align-items:start}}
.guide-aside{position:relative}
@media (min-width:1024px){.guide-aside{position:sticky;top:132px}}
.toc-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:20px;box-shadow:var(--shadow-card)}
.toc-title{font-size:15px;font-weight:700;color:var(--ink-900)}
.toc-list{margin-top:12px;display:flex;flex-direction:column;gap:2px}
.toc-list a{display:flex;align-items:baseline;gap:10px;padding:9px 10px;border-radius:10px;font-size:14px;color:var(--ink-500);transition:background .18s,color .18s}
.toc-list a span{font-size:12px;font-weight:700;color:var(--ink-300)}
.toc-list a:hover{background:var(--brand-50);color:var(--brand-700)}
.toc-list a:hover span{color:var(--brand-600)}
.toc-note{margin-top:16px;padding-top:14px;border-top:1px solid var(--line);font-size:12.5px;line-height:1.75;color:var(--ink-500)}
@media (max-width:1023px){
  .toc-list{flex-direction:row;overflow-x:auto;gap:8px;padding-bottom:4px}
  .toc-list a{white-space:nowrap;background:var(--brand-50);color:var(--brand-700)}
  .toc-list a span{color:var(--brand-600)}
}

/* ---------- steps ---------- */
.step-list{display:flex;flex-direction:column;gap:18px}
.step-card{display:grid;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-card);transition:transform .2s ease-out,box-shadow .2s ease-out;scroll-margin-top:132px}
.step-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lift)}
@media (min-width:600px){.step-card{grid-template-columns:220px 1fr}}
.step-thumb{position:relative;background:var(--brand-50)}
.step-thumb img{width:100%;height:100%;min-height:150px;aspect-ratio:16/10;object-fit:cover}
@media (min-width:600px){.step-thumb img{height:100%}}
.step-no{position:absolute;left:12px;top:12px;display:inline-flex;align-items:center;justify-content:center;min-width:36px;height:26px;padding:0 9px;border-radius:999px;background:rgba(255,255,255,.95);color:var(--brand-700);font-size:12px;font-weight:700;letter-spacing:.02em}
.step-body{padding:20px}
@media (min-width:768px){.step-body{padding:24px}}
.step-body h3{font-size:18px;font-weight:700}
.step-body p{margin-top:8px;font-size:14.5px;line-height:1.8;color:var(--ink-500)}
.step-points{margin-top:14px;display:flex;flex-direction:column;gap:8px}
.step-points li{position:relative;padding-left:18px;font-size:14px;line-height:1.75;color:var(--ink-700)}
.step-points li::before{content:"";position:absolute;left:0;top:.62em;width:6px;height:6px;border-radius:50%;background:var(--brand-500)}
.step-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.tag{display:inline-flex;align-items:center;height:25px;padding:0 10px;border-radius:999px;font-size:12px;font-weight:600;background:var(--brand-50);color:var(--brand-700)}
.tag-accent{background:var(--accent-50);color:var(--accent-600)}

/* ---------- stats ---------- */
.stat-strip{display:grid;grid-template-columns:1fr;gap:14px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:22px;box-shadow:var(--shadow-card)}
@media (min-width:640px){.stat-strip{grid-template-columns:repeat(2,1fr);gap:18px 24px}}
@media (min-width:1024px){.stat-strip{grid-template-columns:repeat(4,1fr);padding:26px 28px}}
.stat-item{display:flex;flex-direction:column;gap:4px;padding-left:14px;border-left:3px solid var(--brand-500)}
.stat-item:nth-child(even){border-left-color:var(--accent-600)}
.stat-item strong{font-size:24px;font-weight:700;color:var(--ink-900);letter-spacing:-.02em}
.stat-item span{font-size:12.5px;line-height:1.7;color:var(--ink-500)}

/* ---------- scenes ---------- */
.scene-grid{display:grid;grid-template-columns:1fr;gap:18px}
@media (min-width:768px){.scene-grid{grid-template-columns:repeat(2,1fr)}}
.scene-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:22px;box-shadow:var(--shadow-card);transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s}
.scene-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lift);border-color:rgba(59,134,232,.35)}
.scene-icon{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:12px;background:var(--brand-50);color:var(--brand-600)}
.scene-card.accent .scene-icon{background:var(--accent-50);color:var(--accent-600)}
.scene-card h3{margin-top:14px;font-size:16.5px;font-weight:700}
.scene-card p{margin-top:8px;font-size:14px;line-height:1.8;color:var(--ink-500)}
.scene-link{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-size:13.5px;font-weight:600;color:var(--brand-700)}
.scene-link svg{transition:transform .18s}
.scene-link:hover svg{transform:translateX(2px)}

/* ---------- faq ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:880px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:0 1px 2px rgba(14,26,43,.04);transition:border-color .18s,box-shadow .18s}
.faq-item.open{border-color:rgba(59,134,232,.4);box-shadow:0 1px 2px rgba(14,26,43,.05),0 12px 26px -18px rgba(14,26,43,.28)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 18px;min-height:54px;background:transparent;border:0;text-align:left;font-size:15px;font-weight:600;color:var(--ink-900);transition:color .18s}
.faq-q:hover{color:var(--brand-700)}
.faq-icon{flex:0 0 auto;width:20px;height:20px;color:var(--ink-500);transition:transform .2s,color .2s}
.faq-item.open .faq-icon{transform:rotate(45deg);color:var(--brand-600)}
.faq-a{padding:0 18px 18px;font-size:14.5px;line-height:1.85;color:var(--ink-500)}
.faq-a[hidden]{display:none}

/* ---------- cta ---------- */
.cta-banner{position:relative;overflow:hidden;border-radius:20px;background:linear-gradient(135deg,#1668D6 0%,#1155B4 100%);padding:34px 22px;color:#fff;box-shadow:0 18px 40px -26px rgba(17,85,180,.9)}
@media (min-width:768px){.cta-banner{padding:46px 44px}}
.cta-banner h2{color:#fff;font-size:23px;font-weight:700}
@media (min-width:768px){.cta-banner h2{font-size:28px}}
.cta-banner p{margin-top:12px;font-size:15px;line-height:1.85;color:rgba(255,255,255,.88);max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px;position:relative;z-index:1}
@media (max-width:519px){.cta-actions .btn{width:100%}}
.cta-wave{position:absolute;right:-30px;bottom:-70px;width:340px;color:#fff;opacity:.14;pointer-events:none}

/* ---------- footer ---------- */
.site-footer{margin-top:26px;background:#fff;border-top:1px solid var(--line)}
.footer-top{padding:42px 0 30px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:28px}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}}
.footer-brand .logo{margin-bottom:14px}
.footer-brand p{font-size:13.5px;line-height:1.85;color:var(--ink-500);max-width:380px}
.footer-title{font-size:14px;font-weight:700;color:var(--ink-900);margin-bottom:12px}
.footer-links{display:flex;flex-direction:column;gap:9px}
.footer-links a{font-size:13.5px;color:var(--ink-500);transition:color .18s}
.footer-links a:hover{color:var(--brand-600)}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 24px;padding:18px 0 26px;border-top:1px solid var(--line);font-size:12.5px;color:var(--ink-500)}

@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
  html{scroll-behavior:auto}
}

/* roulang page: category3 */
:root{
  --brand-600:#1668D6;
  --brand-700:#1155B4;
  --brand-500:#3B86E8;
  --brand-50:#EAF2FE;
  --accent-600:#0E9E9E;
  --accent-50:#E6F6F6;
  --ink-900:#0E1A2B;
  --ink-700:#2B3B52;
  --ink-500:#5C6E86;
  --ink-300:#9AA9BC;
  --line:#E3EAF3;
  --page:#F7F9FC;
  --card:#FFFFFF;
  --star:#F2A93B;
  --radius-lg:16px;
  --radius-md:12px;
  --shadow-card:0 1px 2px rgba(14,26,43,.05), 0 12px 28px -16px rgba(14,26,43,.18);
  --shadow-lift:0 2px 4px rgba(14,26,43,.06), 0 20px 40px -20px rgba(14,26,43,.26);
  --header-h:112px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
@media (min-width:768px){ :root{ --header-h:120px; } }

*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; }
body{
  margin:0;
  padding-top:var(--header-h);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:15px;
  line-height:1.75;
  color:var(--ink-700);
  background:var(--page);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{ margin:0; }
ul,ol{ padding:0; list-style:none; }
a{ color:inherit; text-decoration:none; }
img{ display:block; max-width:100%; height:auto; }
button{ font:inherit; color:inherit; background:none; border:none; cursor:pointer; }
input{ font:inherit; }
svg{ flex:none; }
:focus-visible{ outline:2px solid var(--brand-500); outline-offset:2px; border-radius:8px; }
::selection{ background:var(--brand-50); color:var(--brand-700); }

.container{ width:100%; max-width:1200px; margin:0 auto; padding:0 20px; }
@media (min-width:768px){ .container{ padding:0 32px; } }

/* ============ 头部导航 ============ */
.site-header{
  position:fixed;
  top:0; left:0; right:0;
  z-index:90;
  background:rgba(255,255,255,.94);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.header-main{
  display:flex;
  align-items:center;
  gap:14px;
  height:64px;
}
@media (min-width:768px){
  .header-main{ height:72px; gap:24px; }
}
.logo{ display:inline-flex; align-items:center; gap:10px; flex:none; }
.logo-mark{
  width:34px; height:34px;
  display:grid; place-items:center;
  border-radius:10px;
  color:#fff;
  background:linear-gradient(135deg,var(--brand-600),var(--brand-500));
  box-shadow:0 8px 16px -10px rgba(22,104,214,.9);
}
.logo-text{
  font-size:17px;
  font-weight:700;
  letter-spacing:-.01em;
  color:var(--ink-900);
  white-space:nowrap;
}
.logo-suffix{
  margin-left:6px;
  padding:2px 8px;
  border-radius:999px;
  font-size:11px;
  font-weight:600;
  color:var(--brand-700);
  background:var(--brand-50);
  vertical-align:2px;
}
.header-search{
  position:relative;
  display:none;
  flex:1;
  max-width:300px;
}
@media (min-width:1024px){ .header-search{ display:block; } }
.header-search svg{
  position:absolute;
  top:50%; left:14px;
  transform:translateY(-50%);
  color:var(--ink-300);
  pointer-events:none;
}
.header-search input{
  width:100%;
  height:40px;
  padding:0 16px 0 40px;
  border-radius:999px;
  border:1px solid var(--line);
  background:#fff;
  font-size:14px;
  color:var(--ink-900);
  transition:border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.header-search input::placeholder{ color:var(--ink-300); }
.header-search input:hover{ border-color:#CFDDEE; }
.header-search input:focus{
  outline:none;
  border-color:var(--brand-500);
  box-shadow:0 0 0 3px rgba(59,134,232,.16);
}
.header-actions{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:10px;
}
.hamburger{
  width:40px; height:40px;
  display:grid; place-items:center;
  border-radius:10px;
  border:1px solid var(--line);
  background:#fff;
  color:var(--ink-700);
  transition:background .2s var(--ease), border-color .2s var(--ease);
}
.hamburger:hover{ background:var(--brand-50); border-color:var(--brand-500); color:var(--brand-700); }
@media (min-width:1024px){ .hamburger{ display:none; } }

.channels{
  display:flex;
  align-items:center;
  gap:6px;
  height:48px;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.channels::-webkit-scrollbar{ display:none; }
.channel{
  flex:none;
  display:inline-flex;
  align-items:center;
  height:32px;
  padding:0 14px;
  border-radius:999px;
  font-size:14px;
  color:var(--ink-500);
  white-space:nowrap;
  transition:background .18s var(--ease), color .18s var(--ease);
}
.channel:hover{ color:var(--brand-700); background:var(--brand-50); }
.channel.active{
  color:var(--brand-600);
  font-weight:600;
  background:var(--brand-50);
  box-shadow:inset 0 0 0 1px rgba(59,134,232,.25);
}

.mobile-nav{
  display:none;
  border-top:1px solid var(--line);
  background:#fff;
  padding:10px 20px 16px;
}
.mobile-nav.open{ display:block; }
.mobile-nav a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:46px;
  padding:0 4px;
  font-size:15px;
  color:var(--ink-700);
  border-bottom:1px solid var(--line);
}
.mobile-nav a:last-child{ border-bottom:none; }
.mobile-nav a.active{ color:var(--brand-600); font-weight:600; }

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 20px;
  border-radius:var(--radius-md);
  font-size:14px;
  font-weight:600;
  white-space:nowrap;
  transition:transform .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease), box-shadow .2s var(--ease), color .2s var(--ease);
}
.btn-primary{
  color:#fff;
  background:var(--brand-600);
  box-shadow:0 12px 22px -14px rgba(22,104,214,.95);
}
.btn-primary:hover{ background:var(--brand-700); transform:translateY(-1px); box-shadow:0 16px 26px -14px rgba(17,85,180,.95); }
.btn-primary:active{ transform:translateY(0); }
.btn-ghost{
  color:var(--ink-700);
  background:#fff;
  border:1px solid var(--line);
}
.btn-ghost:hover{ color:var(--brand-700); border-color:var(--brand-500); background:var(--brand-50); }
.btn-sm{ height:38px; padding:0 16px; font-size:13px; border-radius:10px; }
.btn-block{ width:100%; }
@media (max-width:767px){
  .btn{ height:46px; }
}

/* ============ 通用板块 ============ */
.section{ padding:52px 0; }
@media (min-width:768px){ .section{ padding:76px 0; } }
@media (min-width:1024px){ .section{ padding:88px 0; } }
.section-head{ max-width:720px; margin-bottom:28px; }
@media (min-width:768px){ .section-head{ margin-bottom:36px; } }
.section-head h2{
  font-size:23px;
  line-height:1.35;
  font-weight:700;
  letter-spacing:-.01em;
  color:var(--ink-900);
}
@media (min-width:768px){ .section-head h2{ font-size:28px; } }
.section-head p{
  margin-top:10px;
  font-size:14.5px;
  line-height:1.8;
  color:var(--ink-500);
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:26px;
  padding:0 10px;
  border-radius:999px;
  font-size:12px;
  font-weight:600;
  color:var(--accent-600);
  background:var(--accent-50);
  margin-bottom:12px;
}

.badge{
  display:inline-flex;
  align-items:center;
  gap:5px;
  height:25px;
  padding:0 10px;
  border-radius:999px;
  font-size:12px;
  font-weight:600;
  white-space:nowrap;
}
.badge-brand{ color:var(--brand-700); background:var(--brand-50); }
.badge-accent{ color:var(--accent-600); background:var(--accent-50); }
.badge-soft{ color:var(--ink-500); background:#F1F5FA; }

/* ============ Hero ============ */
.page-hero{
  position:relative;
  padding:32px 0 44px;
  background:linear-gradient(180deg,#EFF5FE 0%,rgba(247,249,252,0) 100%);
  overflow:hidden;
}
@media (min-width:768px){ .page-hero{ padding:44px 0 60px; } }
.crumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--ink-500);
  margin-bottom:18px;
}
.crumb a{ color:var(--ink-500); transition:color .18s var(--ease); }
.crumb a:hover{ color:var(--brand-600); }
.crumb span{ color:var(--ink-300); }
.crumb strong{ color:var(--ink-700); font-weight:600; }
.hero-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:28px;
  align-items:center;
}
@media (min-width:1024px){
  .hero-grid{ grid-template-columns:1.05fr .95fr; gap:48px; }
}
.hero-copy h1{
  font-size:28px;
  line-height:1.28;
  font-weight:700;
  letter-spacing:-.02em;
  color:var(--ink-900);
  margin-bottom:14px;
}
@media (min-width:768px){ .hero-copy h1{ font-size:36px; } }
@media (min-width:1024px){ .hero-copy h1{ font-size:40px; } }
.hero-sub{
  font-size:15px;
  line-height:1.85;
  color:var(--ink-500);
  max-width:560px;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:24px;
}
@media (max-width:520px){
  .hero-actions .btn{ width:100%; }
}
.hero-meta{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:10px;
  margin-top:28px;
  padding-top:22px;
  border-top:1px solid var(--line);
  max-width:520px;
}
.hero-meta li{ display:flex; flex-direction:column; gap:2px; }
.hero-meta strong{
  font-size:19px;
  font-weight:700;
  color:var(--ink-900);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.01em;
}
.hero-meta span{ font-size:12.5px; color:var(--ink-500); }
.hero-media{
  position:relative;
  border-radius:18px;
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--brand-50);
  box-shadow:var(--shadow-lift);
  aspect-ratio:16/11;
}
.hero-media img{ width:100%; height:100%; object-fit:cover; }
.hero-media::after{
  content:"";
  position:absolute; inset:0;
  background:linear-gradient(120deg,rgba(14,26,43,.34) 0%,rgba(14,26,43,.06) 62%,rgba(14,26,43,0) 100%);
  pointer-events:none;
}
.hero-media figcaption{
  position:absolute;
  left:16px; bottom:14px;
  z-index:1;
  font-size:12.5px;
  font-weight:600;
  color:#fff;
  padding:5px 12px;
  border-radius:999px;
  background:rgba(14,26,43,.42);
  -webkit-backdrop-filter:blur(4px);
  backdrop-filter:blur(4px);
}

/* ============ 归档筛选 ============ */
.filter-bar{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  margin-bottom:26px;
}
.filter-btn{
  height:34px;
  padding:0 15px;
  border-radius:999px;
  font-size:13.5px;
  font-weight:500;
  color:var(--ink-500);
  background:#fff;
  border:1px solid var(--line);
  transition:all .18s var(--ease);
}
.filter-btn:hover{ color:var(--brand-700); border-color:var(--brand-500); background:var(--brand-50); }
.filter-btn[aria-pressed="true"]{
  color:#fff;
  background:var(--brand-600);
  border-color:var(--brand-600);
  box-shadow:0 10px 18px -14px rgba(22,104,214,.95);
}
.filter-count{
  margin-left:auto;
  font-size:13px;
  color:var(--ink-500);
  font-variant-numeric:tabular-nums;
}
@media (max-width:520px){ .filter-count{ display:none; } }

/* ============ 时间线 ============ */
.timeline{ position:relative; }
.timeline::before{
  content:"";
  position:absolute;
  top:10px; bottom:10px; left:11px;
  width:2px;
  border-radius:2px;
  background:linear-gradient(180deg,var(--brand-500) 0%,rgba(59,134,232,.28) 55%,var(--line) 100%);
}
@media (min-width:768px){ .timeline::before{ left:15px; } }
.release{
  position:relative;
  padding-left:38px;
  margin-bottom:22px;
}
.release:last-child{ margin-bottom:0; }
@media (min-width:768px){ .release{ padding-left:56px; margin-bottom:28px; } }
.release::before{
  content:"";
  position:absolute;
  left:5px; top:18px;
  width:14px; height:14px;
  border-radius:50%;
  background:#fff;
  border:3px solid var(--brand-500);
  box-shadow:0 0 0 4px rgba(234,242,254,.9);
}
@media (min-width:768px){ .release::before{ left:9px; top:22px; } }
.release[hidden]{ display:none; }

.release-card{
  display:grid;
  grid-template-columns:1fr;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);
  overflow:hidden;
  transition:transform .2s var(--ease), box-shadow .2s var(--ease);
}
.release-card:hover{ transform:translateY(-2px); box-shadow:var(--shadow-lift); }
.release-media{
  position:relative;
  background:var(--brand-50);
  overflow:hidden;
}
.release-media img{
  width:100%;
  height:100%;
  aspect-ratio:16/10;
  object-fit:cover;
}
.release-body{ padding:20px; }
@media (min-width:768px){ .release-body{ padding:26px 28px; } }
.release-top{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  margin-bottom:12px;
}
.release-title{
  font-size:18px;
  line-height:1.45;
  font-weight:700;
  color:var(--ink-900);
  margin-bottom:8px;
}
@media (min-width:768px){ .release-title{ font-size:20px; } }
.release-desc{
  font-size:14.5px;
  line-height:1.8;
  color:var(--ink-500);
  margin-bottom:14px;
}
.release-list{ display:grid; gap:8px; }
.release-list li{
  position:relative;
  padding-left:20px;
  font-size:14px;
  line-height:1.75;
  color:var(--ink-700);
}
.release-list li::before{
  content:"";
  position:absolute;
  left:2px; top:10px;
  width:7px; height:7px;
  border-radius:2px;
  background:var(--accent-600);
  opacity:.7;
  transform:rotate(45deg);
}
.release-foot{
  display:flex;
  flex-wrap:wrap;
  gap:6px 14px;
  margin-top:16px;
  padding-top:14px;
  border-top:1px dashed var(--line);
  font-size:12.5px;
  color:var(--ink-500);
  font-variant-numeric:tabular-nums;
}
.release-foot span{ display:inline-flex; align-items:center; gap:5px; }

@media (min-width:900px){
  .release-card{ grid-template-columns:minmax(0,1fr) minmax(0,1.05fr); }
  .release-media img{ aspect-ratio:auto; height:100%; min-height:260px; }
  .release:nth-child(even) .release-media{ order:2; }
  .release:nth-child(even) .release-body{ order:1; }
}

.empty-hint{
  display:none;
  padding:44px 20px;
  text-align:center;
  border:1px dashed var(--line);
  border-radius:var(--radius-lg);
  background:var(--brand-50);
  color:var(--ink-500);
  font-size:14px;
}
.empty-hint.show{ display:block; }

/* ============ 升级核对双栏 ============ */
.check-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:24px;
  align-items:center;
}
@media (min-width:1024px){
  .check-grid{ grid-template-columns:.92fr 1.08fr; gap:48px; }
}
.check-media{
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  background:var(--brand-50);
  aspect-ratio:16/11;
}
.check-media img{ width:100%; height:100%; object-fit:cover; }
@media (min-width:1024px){
  .check-grid .check-media{ order:2; }
}
.check-list{ display:grid; gap:14px; margin-top:20px; }
.check-item{
  display:flex;
  gap:14px;
  padding:16px 18px;
  border-radius:var(--radius-md);
  background:#fff;
  border:1px solid var(--line);
  box-shadow:0 1px 2px rgba(14,26,43,.04);
  transition:border-color .2s var(--ease), transform .2s var(--ease);
}
.check-item:hover{ border-color:#CFDDEE; transform:translateY(-2px); }
.check-icon{
  width:36px; height:36px;
  flex:none;
  display:grid; place-items:center;
  border-radius:10px;
  color:var(--brand-600);
  background:var(--brand-50);
}
.check-item h4{
  font-size:15px;
  font-weight:600;
  color:var(--ink-900);
  margin-bottom:3px;
}
.check-item p{
  font-size:13.8px;
  line-height:1.75;
  color:var(--ink-500);
}

/* ============ 提示条 ============ */
.notice{
  display:flex;
  gap:14px;
  padding:18px 20px;
  border-radius:var(--radius-lg);
  background:var(--accent-50);
  border:1px solid rgba(14,158,158,.18);
  margin-top:26px;
}
.notice svg{ color:var(--accent-600); margin-top:2px; }
.notice p{ font-size:13.8px; line-height:1.8; color:#0B6E6E; }
.notice strong{ font-weight:700; }

/* ============ FAQ ============ */
.faq-wrap{
  max-width:840px;
  margin:0 auto;
  display:grid;
  gap:12px;
}
.faq-item{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  box-shadow:0 1px 2px rgba(14,26,43,.04);
  overflow:hidden;
  transition:border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.faq-item:hover{ border-color:#CFDDEE; }
.faq-item.open{ border-color:rgba(59,134,232,.45); box-shadow:var(--shadow-card); }
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:17px 20px;
  text-align:left;
  font-size:15.5px;
  font-weight:600;
  color:var(--ink-900);
  line-height:1.6;
  transition:color .18s var(--ease);
}
.faq-q:hover{ color:var(--brand-600); }
.faq-sign{
  width:26px; height:26px;
  flex:none;
  display:grid; place-items:center;
  border-radius:50%;
  color:var(--brand-600);
  background:var(--brand-50);
  transition:transform .22s var(--ease);
}
.faq-item.open .faq-sign{ transform:rotate(45deg); }
.faq-a{
  display:none;
  padding:0 20px 18px;
  font-size:14.3px;
  line-height:1.85;
  color:var(--ink-500);
}
.faq-item.open .faq-a{ display:block; }

/* ============ CTA ============ */
.cta-band{
  position:relative;
  overflow:hidden;
  border-radius:20px;
  background:linear-gradient(135deg,#0E1A2B 0%,#123B72 62%,#1155B4 100%);
  color:#fff;
  padding:34px 24px;
}
@media (min-width:768px){ .cta-band{ padding:46px 48px; } }
.cta-wave{
  position:absolute;
  right:-40px; bottom:-30px;
  width:420px;
  opacity:.16;
  pointer-events:none;
}
.cta-inner{
  position:relative;
  display:grid;
  gap:24px;
  align-items:center;
}
@media (min-width:900px){
  .cta-inner{ grid-template-columns:1.15fr .85fr; gap:40px; }
}
.cta-band h2{
  font-size:22px;
  line-height:1.4;
  font-weight:700;
  letter-spacing:-.01em;
  margin-bottom:10px;
}
@media (min-width:768px){ .cta-band h2{ font-size:27px; } }
.cta-band p{
  font-size:14.5px;
  line-height:1.85;
  color:rgba(255,255,255,.76);
  max-width:520px;
}
.cta-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}
@media (min-width:900px){ .cta-actions{ justify-content:flex-end; } }
.btn-on-dark{
  background:#fff;
  color:var(--brand-700);
  box-shadow:0 16px 26px -18px rgba(0,0,0,.7);
}
.btn-on-dark:hover{ background:var(--brand-50); transform:translateY(-1px); }
.btn-outline-dark{
  background:rgba(255,255,255,.06);
  color:#fff;
  border:1px solid rgba(255,255,255,.32);
}
.btn-outline-dark:hover{ background:rgba(255,255,255,.14); border-color:rgba(255,255,255,.6); }
.cta-facts{
  display:flex;
  flex-wrap:wrap;
  gap:8px 20px;
  margin-top:18px;
  font-size:12.8px;
  color:rgba(255,255,255,.66);
  font-variant-numeric:tabular-nums;
}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:52px;
  background:#fff;
  border-top:1px solid var(--line);
}
@media (min-width:768px){ .site-footer{ margin-top:72px; } }
.footer-top{ padding:44px 0 34px; }
@media (min-width:768px){ .footer-top{ padding:56px 0 42px; } }
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:30px;
}
@media (min-width:640px){
  .footer-grid{ grid-template-columns:1fr 1fr; gap:32px; }
}
@media (min-width:1024px){
  .footer-grid{ grid-template-columns:1.9fr 1fr 1fr 1fr; gap:40px; }
}
.footer-brand .logo{ margin-bottom:14px; }
.footer-brand p{
  font-size:13.6px;
  line-height:1.85;
  color:var(--ink-500);
  max-width:400px;
}
.footer-title{
  font-size:14px;
  font-weight:700;
  color:var(--ink-900);
  margin-bottom:14px;
}
.footer-links{ display:grid; gap:10px; }
.footer-links a{
  font-size:13.6px;
  color:var(--ink-500);
  transition:color .18s var(--ease);
}
.footer-links a:hover{ color:var(--brand-600); }
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:8px 20px;
  justify-content:space-between;
  padding:18px 20px 26px;
  border-top:1px solid var(--line);
  font-size:12.8px;
  color:var(--ink-500);
}
@media (min-width:768px){ .footer-bottom{ padding:20px 32px 28px; } }

.sr-only{
  position:absolute;
  width:1px; height:1px;
  padding:0; margin:-1px;
  overflow:hidden;
  clip:rect(0,0,0,0);
  white-space:nowrap;
  border:0;
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .release-card:hover,
  .check-item:hover,
  .btn-primary:hover,
  .btn-on-dark:hover{ transform:none; }
}