/* roulang page: index */
:root{
  --brand-700:#0F3F91;
  --brand-600:#1554C0;
  --brand-500:#2E6ED8;
  --brand-050:#EDF3FD;
  --accent-500:#FF7A2F;
  --ink-900:#101B2D;
  --ink-700:#2A3648;
  --ink-500:#6B7A90;
  --line:#E4E9F2;
  --bg-page:#F5F7FB;
  --bg-card:#FFFFFF;
  --bg-dark:#0A2A5E;
  --success:#12A594;
  --warning:#E8A33D;
  --danger:#D9453F;
  --r-sm:10px;
  --r-md:12px;
  --r-lg:14px;
  --r-xl:18px;
  --r-pill:999px;
  --sh-1:0 1px 3px rgba(16,27,45,.06);
  --sh-2:0 4px 14px rgba(16,27,45,.07);
  --sh-3:0 12px 28px rgba(16,27,45,.12);
  --sidebar:248px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink-700);
  background:var(--bg-page);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;background:#EDF1F8}
a{color:var(--brand-600);text-decoration:none;transition:color .16s var(--ease)}
a:hover{color:var(--brand-700)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700}
p{margin:0}
button,input,select{font-family:inherit;font-size:inherit}
:focus-visible{outline:3px solid rgba(21,84,192,.32);outline-offset:2px;border-radius:6px}
::selection{background:rgba(21,84,192,.16)}

.container{width:100%;max-width:1160px;margin:0 auto;padding:0 40px}
.site-main{margin-left:var(--sidebar);min-height:100vh;display:flex;flex-direction:column}
.section{padding:88px 0}
.section-alt{background:var(--bg-card);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;margin-bottom:36px}
.section-head h2{font-size:clamp(24px,2.8vw,32px);line-height:1.35;font-weight:700}
.section-sub{max-width:640px;color:var(--ink-500);font-size:15px;line-height:1.75;margin-top:10px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:1px;font-weight:600;color:var(--brand-600);margin-bottom:12px}
.eyebrow::before{content:"";width:18px;height:2px;border-radius:2px;background:var(--accent-500)}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;white-space:nowrap}
.link-more svg{transition:transform .16s var(--ease)}
.link-more:hover svg{transform:translateX(2px)}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border-radius:var(--r-sm);border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;background:none;transition:background .16s var(--ease),color .16s var(--ease),transform .16s var(--ease),box-shadow .16s var(--ease),border-color .16s var(--ease);white-space:nowrap}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn-outline{background:#fff;color:var(--brand-600);border-color:var(--brand-600)}
.btn-outline:hover{background:var(--brand-050);color:var(--brand-700);border-color:var(--brand-700)}
.btn-outline:active{transform:translateY(1px)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn-ghost:hover{background:rgba(255,255,255,.14);color:#fff;border-color:#fff}
.btn-block{width:100%}
.btn[disabled]{opacity:.5;cursor:not-allowed}

/* 侧栏导航 */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar);
  background:#fff;border-right:1px solid var(--line);
  padding:22px 16px 14px;display:flex;flex-direction:column;gap:6px;
  overflow-y:auto;z-index:60;
}
.brand{display:flex;flex-direction:column;gap:1px;padding:4px 10px 18px;border-bottom:1px solid var(--line);margin-bottom:12px}
.brand-main{font-size:21px;font-weight:800;color:var(--ink-900);letter-spacing:.5px;line-height:1.3}
.brand-sub{font-size:12px;letter-spacing:.5px;color:#6B7A90;line-height:1.5}
.nav-group-title{font-size:12px;letter-spacing:1px;color:#8A97AC;font-weight:600;padding:0 12px;margin:14px 0 6px}
.nav-link{position:relative;display:flex;align-items:center;gap:10px;height:44px;padding:0 12px;border-radius:var(--r-sm);color:var(--ink-700);font-size:15px;font-weight:500;transition:background .12s var(--ease),color .12s var(--ease)}
.nav-link svg{width:20px;height:20px;flex:0 0 20px;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.nav-link:hover{background:#F1F5FC;color:var(--brand-600)}
.nav-link.active{background:var(--brand-050);color:var(--brand-600);font-weight:700}
.nav-link.active::before{content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;border-radius:0 3px 3px 0;background:var(--brand-600)}
.nav-hint{font-size:12px;color:#8A97AC;line-height:1.6;padding:0 12px;margin-top:2px}
.sidebar-foot{margin-top:auto;padding-top:16px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:10px}
.sidebar-foot .btn{height:42px;font-size:14px;width:100%}
.sidebar-copy{font-size:12px;color:#8A97AC;line-height:1.6;padding:0 2px}

/* 移动端导航 */
.mobilebar{display:none;position:fixed;top:0;left:0;right:0;height:60px;background:#fff;border-bottom:1px solid var(--line);z-index:70;align-items:center;justify-content:space-between;padding:0 16px}
.mobilebar .brand{padding:0;border:none;margin:0}
.mobilebar .brand-main{font-size:18px}
.mobilebar .brand-sub{font-size:11px}
.nav-toggle{width:42px;height:42px;border:1px solid var(--line);border-radius:var(--r-sm);background:#fff;display:grid;place-items:center;cursor:pointer}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-900);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink-900);border-radius:2px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.drawer-mask{position:fixed;inset:0;background:rgba(10,20,40,.45);opacity:0;visibility:hidden;transition:opacity .24s var(--ease),visibility .24s;z-index:80}
.drawer-mask.open{opacity:1;visibility:visible}
.drawer{position:fixed;top:0;right:0;bottom:0;width:min(84vw,340px);background:#fff;transform:translateX(100%);transition:transform .24s var(--ease);z-index:90;padding:20px 16px;overflow-y:auto;display:flex;flex-direction:column;gap:6px}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px;padding-bottom:14px;border-bottom:1px solid var(--line)}
.drawer-close{width:38px;height:38px;border-radius:var(--r-sm);border:1px solid var(--line);background:#fff;font-size:18px;color:var(--ink-500);cursor:pointer;line-height:1}
.drawer-foot{margin-top:18px;padding-top:16px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:10px}

/* Hero */
.hero-wrap{padding:32px 0 0}
.hero{position:relative;overflow:hidden;border-radius:var(--r-xl);padding:52px 44px;min-height:540px;display:flex;align-items:center;
  background-image:linear-gradient(180deg,rgba(255,255,255,.90) 0%,rgba(255,255,255,.96) 100%),url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;border:1px solid var(--line);box-shadow:var(--sh-1)}
.hero-arc{position:absolute;right:-70px;top:50%;transform:translateY(-50%);pointer-events:none;z-index:0}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1fr) 370px;gap:48px;align-items:center;width:100%}
.hero h1{font-size:clamp(30px,4vw,44px);font-weight:800;line-height:1.25;letter-spacing:0}
.hero-sub{margin-top:18px;font-size:18px;line-height:1.7;color:#3C4A60;max-width:560px}
.hero-actions{display:flex;gap:12px;margin-top:28px;flex-wrap:wrap}
.trust{display:flex;flex-wrap:wrap;gap:14px;margin-top:22px;font-size:13px;color:var(--ink-500)}
.trust li{display:flex;align-items:center;gap:14px}
.trust li:not(:last-child)::after{content:"·";color:#B9C4D6}

/* 登录卡 */
.login-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-xl);box-shadow:var(--sh-3);padding:24px;width:100%;max-width:380px;justify-self:end}
.login-card h2{font-size:19px;font-weight:700;line-height:1.4}
.login-card .login-tip{font-size:13px;color:var(--ink-500);margin-top:6px}
.field{display:flex;flex-direction:column;gap:6px;margin-top:16px}
.field label{font-size:14px;color:#3C4A60}
.field input{height:44px;border-radius:var(--r-sm);border:1px solid #DDE4F0;background:#fff;padding:0 14px;font-size:15px;color:var(--ink-900);transition:border-color .16s var(--ease),box-shadow .16s var(--ease)}
.field input::placeholder{color:#9AA7BA}
.field input:focus{outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(21,84,192,.12)}
.field .field-tip{font-size:13px;color:var(--danger);margin-top:2px}
.login-row{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:14px 0 18px;font-size:13px}
.check{display:inline-flex;align-items:center;gap:8px;color:var(--ink-700);cursor:pointer}
.check input{width:16px;height:16px;accent-color:var(--brand-600)}
.login-card .btn-block{margin-top:2px}
.login-foot{margin-top:14px;font-size:13px;color:var(--ink-500);text-align:center}

/* 价值区 */
.value-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:56px;align-items:center}
.value-list{border-top:1px solid var(--line)}
.value-item{display:flex;gap:18px;padding:20px 0;border-bottom:1px solid var(--line)}
.value-num{font-size:34px;font-weight:800;line-height:1;color:rgba(21,84,192,.20);font-variant-numeric:tabular-nums;min-width:52px}
.value-item h3{font-size:17px;font-weight:700;line-height:1.5}
.value-item p{margin-top:6px;font-size:15px;line-height:1.75;color:var(--ink-500)}
.value-media{position:relative}
.value-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-xl);border:1px solid var(--line);box-shadow:var(--sh-3)}
.value-media figcaption{margin-top:12px;font-size:13px;color:var(--ink-500);text-align:center}

/* 功能轮播 */
.rail-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:28px}
.rail-actions{display:flex;gap:10px}
.rail-btn{width:44px;height:44px;border-radius:var(--r-pill);border:1px solid var(--line);background:#fff;color:var(--brand-600);display:grid;place-items:center;cursor:pointer;box-shadow:var(--sh-1);transition:background .16s var(--ease),box-shadow .16s var(--ease),transform .16s var(--ease)}
.rail-btn:hover{background:var(--brand-050);box-shadow:var(--sh-2);transform:translateY(-1px)}
.rail{display:flex;gap:20px;overflow-x:auto;padding:6px 4px 20px;scroll-snap-type:x proximity}
.rail::-webkit-scrollbar{height:6px}
.rail::-webkit-scrollbar-track{background:#EDF1F8;border-radius:var(--r-pill)}
.rail::-webkit-scrollbar-thumb{background:rgba(21,84,192,.4);border-radius:var(--r-pill)}
.feature-card{flex:0 0 340px;scroll-snap-align:start;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-2);padding:14px;transition:box-shadow .16s var(--ease),transform .16s var(--ease)}
.feature-card:hover{box-shadow:var(--sh-3);transform:translateY(-2px)}
.feature-card img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-md)}
.feature-card h3{margin-top:14px;font-size:16px;font-weight:700;line-height:1.5}
.feature-card p{margin-top:6px;font-size:14px;line-height:1.7;color:var(--ink-500)}

/* 系统要求 */
.spec-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.spec-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1);padding:24px;transition:box-shadow .16s var(--ease),transform .16s var(--ease)}
.spec-card:nth-child(2){background:#F7F9FD}
.spec-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.spec-card h3{font-size:17px;font-weight:700;display:flex;align-items:center;gap:10px}
.spec-card h3 .dot{width:8px;height:8px;border-radius:50%;background:var(--brand-600)}
.spec-card dl{margin:16px 0 0}
.spec-row{display:flex;align-items:baseline;justify-content:space-between;gap:14px;padding:11px 0;border-bottom:1px dashed var(--line)}
.spec-row:last-child{border-bottom:none}
.spec-row dt{font-size:14px;color:var(--ink-500);white-space:nowrap}
.spec-row dd{margin:0;font-size:15px;font-weight:600;color:var(--ink-900);text-align:right;font-variant-numeric:tabular-nums}

/* 评价墙 */
.review-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;align-items:start}
.review-col{display:flex;flex-direction:column;gap:24px}
.review-col:nth-child(2){margin-top:32px}
.review-col:nth-child(3){margin-top:16px}
.review-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1);padding:22px;transition:box-shadow .16s var(--ease),transform .16s var(--ease)}
.review-card:hover{box-shadow:var(--sh-3);transform:translateY(-2px)}
.review-card.pinned{border-color:var(--brand-600);box-shadow:var(--sh-2)}
.review-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}
.stars{display:inline-flex;gap:3px;color:var(--accent-500)}
.review-badge{font-size:11px;font-weight:700;color:#fff;background:var(--brand-600);border-radius:var(--r-pill);padding:2px 10px;letter-spacing:.5px}
.review-card p{font-size:15px;line-height:1.75;color:var(--ink-700)}
.review-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:16px;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--ink-500)}
.review-meta .name{font-weight:700;color:var(--ink-900)}
.tag{display:inline-flex;align-items:center;font-size:12px;line-height:1.6;padding:2px 10px;border-radius:var(--r-pill);background:var(--brand-050);color:var(--brand-600);font-weight:600}

/* 下载面板 */
.download-panel{position:relative;overflow:hidden;background:var(--bg-dark);border-radius:var(--r-xl);padding:44px;color:#C7D5EA}
.download-panel::after{content:"";position:absolute;right:-120px;bottom:-160px;width:420px;height:420px;border-radius:50%;border:34px solid rgba(255,255,255,.05);pointer-events:none}
.download-panel h2{color:#fff;font-size:clamp(24px,2.8vw,30px);line-height:1.35}
.download-panel .panel-sub{margin-top:10px;font-size:15px;line-height:1.75;max-width:620px;color:#C7D5EA}
.dl-grid{position:relative;z-index:1;display:grid;grid-template-columns:repeat(2,minmax(0,1fr)) 300px;gap:20px;margin-top:30px}
.dl-btn{display:flex;align-items:center;gap:16px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);border-radius:var(--r-lg);padding:18px 20px;color:#fff;transition:background .16s var(--ease),transform .16s var(--ease),box-shadow .16s var(--ease)}
.dl-btn:hover{background:rgba(255,255,255,.16);color:#fff;transform:translateY(-2px);box-shadow:0 12px 28px rgba(0,0,0,.28)}
.dl-btn svg{width:28px;height:28px;flex:0 0 28px;stroke:#fff;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.dl-btn strong{display:block;font-size:16px;font-weight:700;line-height:1.4}
.dl-btn span{display:block;font-size:12px;color:#C7D5EA;line-height:1.6;margin-top:2px}
.qr-card{background:#fff;border-radius:var(--r-lg);padding:20px;text-align:center;color:var(--ink-700)}
.qr-box{width:120px;height:120px;margin:0 auto 12px;border:1px solid var(--line);border-radius:var(--r-md);display:grid;place-items:center;background:#fff}
.qr-card strong{display:block;font-size:15px;color:var(--ink-900)}
.qr-card span{display:block;font-size:12px;color:var(--ink-500);margin-top:4px;line-height:1.6}
.dl-more{position:relative;z-index:1;margin-top:22px;display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:#fff}
.dl-more:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}

/* 资讯 */
.news-grid{margin-top:4px}
.news-lead{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:28px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1);overflow:hidden;transition:box-shadow .16s var(--ease),transform .16s var(--ease)}
.news-lead:hover{box-shadow:var(--sh-3);transform:translateY(-2px)}
.news-lead-media img{width:100%;height:100%;min-height:260px;aspect-ratio:16/9;object-fit:cover}
.news-lead-body{padding:26px 28px 26px 0;display:flex;flex-direction:column;gap:12px}
.news-lead-body h3{font-size:22px;font-weight:700;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-lead:hover h3{color:var(--brand-600)}
.news-lead-body p{font-size:15px;line-height:1.75;color:var(--ink-500);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.news-list{margin-top:16px;border-top:1px solid var(--line)}
.news-item{display:grid;grid-template-columns:120px minmax(0,1fr) 20px;gap:18px;align-items:center;padding:18px 8px;border-bottom:1px solid var(--line);color:inherit;transition:background .16s var(--ease)}
.news-item:hover{background:#F1F5FC;color:inherit}
.news-item img{width:120px;height:80px;object-fit:cover;border-radius:var(--r-md);border:1px solid var(--line)}
.news-item h3{font-size:17px;font-weight:600;line-height:1.5;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;color:var(--ink-900)}
.news-item:hover h3{color:var(--brand-600)}
.news-item p{margin-top:4px;font-size:14px;line-height:1.7;color:var(--ink-500);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{display:flex;align-items:center;gap:10px;margin-top:6px;font-size:13px;color:var(--ink-500)}
.news-arrow{color:#B9C4D6;transition:transform .16s var(--ease),color .16s var(--ease)}
.news-item:hover .news-arrow{transform:translateX(2px);color:var(--brand-600)}
.empty-state{height:180px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;background:#fff;border:1px dashed var(--line);border-radius:var(--r-lg);color:var(--ink-500);font-size:14px}
.empty-state svg{width:40px;height:40px;stroke:#B9C4D6;fill:none;stroke-width:1.4;stroke-linecap:round;stroke-linejoin:round}
.empty-state strong{font-size:15px;color:var(--ink-700);font-weight:600}
.empty-state span{font-size:13px;color:var(--ink-500)}

/* FAQ */
.faq-wrap{max-width:860px}
.faq-item{position:relative;border-bottom:1px solid var(--line);padding:0 4px}
.faq-item:first-of-type{border-top:1px solid var(--line)}
.faq-item[open]::before{content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;border-radius:3px;background:var(--brand-600)}
.faq-item summary{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:56px;padding:14px 0 14px 16px;cursor:pointer;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-q{font-size:17px;font-weight:700;color:var(--ink-900);line-height:1.5}
.faq-icon{position:relative;width:18px;height:18px;flex:0 0 18px;transition:transform .2s var(--ease)}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--brand-600);border-radius:2px}
.faq-icon::before{left:0;top:8px;width:18px;height:2px}
.faq-icon::after{left:8px;top:0;width:2px;height:18px;transition:transform .2s var(--ease)}
.faq-item[open] .faq-icon{transform:rotate(180deg)}
.faq-item[open] .faq-icon::after{transform:scaleY(0)}
.faq-a{padding:0 40px 20px 16px;font-size:15px;line-height:1.8;color:var(--ink-700);max-width:760px}

/* 结尾 CTA */
.cta-band{position:relative;overflow:hidden;background:var(--bg-dark);border-radius:var(--r-xl);padding:56px 40px;text-align:center;color:#C7D5EA}
.cta-band h2{color:#fff;font-size:clamp(24px,2.8vw,30px);line-height:1.35}
.cta-band p{margin:14px auto 0;max-width:620px;font-size:15px;line-height:1.75;color:#C7D5EA}
.cta-actions{display:flex;justify-content:center;gap:12px;margin-top:28px;flex-wrap:wrap}
.cta-arc{position:absolute;left:50%;top:-140px;transform:translateX(-50%);pointer-events:none}

/* 页脚 */
.site-footer{background:var(--bg-dark);color:#C7D5EA;margin-top:88px;padding:56px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.footer-brand{font-size:19px;font-weight:800;color:#fff;letter-spacing:.5px}
.footer-desc{margin-top:10px;font-size:14px;line-height:1.75;color:#C7D5EA;max-width:320px}
.site-footer h4{color:#fff;font-size:14px;font-weight:700;letter-spacing:.5px;margin-bottom:14px}
.site-footer li{margin-bottom:9px;font-size:14px}
.site-footer a{color:#C7D5EA}
.site-footer a:hover{color:#fff;text-decoration:underline;text-underline-offset:2px}
.footer-bottom{margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.14);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:#9FB4D2}

/* 响应式 */
@media (min-width:1440px){:root{--sidebar:272px}}
@media (max-width:1279px) and (min-width:1024px){
  :root{--sidebar:200px}
  .nav-hint{display:none}
  .container{padding:0 32px}
  .hero{padding:44px 32px}
  .hero-grid{grid-template-columns:minmax(0,1fr) 330px;gap:32px}
}
@media (max-width:1023px){
  :root{--sidebar:0px}
  .sidebar{display:none}
  .mobilebar{display:flex}
  .site-main{margin-left:0;padding-top:60px}
  .container{padding:0 24px}
  .section{padding:64px 0}
  .hero{min-height:auto;padding:40px 28px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .login-card{justify-self:stretch;max-width:520px}
  .value-grid{grid-template-columns:1fr;gap:32px}
  .spec-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .review-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .review-col:nth-child(2),.review-col:nth-child(3){margin-top:0}
  .dl-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .qr-card{grid-column:1 / -1}
  .news-lead{grid-template-columns:1fr}
  .news-lead-body{padding:22px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .section{padding:56px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:26px}
  .hero{padding:32px 20px;border-radius:var(--r-lg)}
  .hero-sub{font-size:16px}
  .hero-actions{gap:10px}
  .hero-actions .btn{flex:1 1 100%}
  .trust{flex-direction:column;gap:6px}
  .trust li:not(:last-child)::after{display:none}
  .value-num{font-size:28px;min-width:44px}
  .spec-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .feature-card{flex:0 0 268px}
  .download-panel{padding:32px 20px}
  .dl-grid{grid-template-columns:1fr}
  .cta-band{padding:40px 20px}
  .cta-actions .btn{width:100%}
  .news-item{grid-template-columns:84px minmax(0,1fr) 16px;gap:12px}
  .news-item img{width:84px;height:60px}
  .news-item p{display:none}
  .faq-a{padding-right:16px}
  .review-card,.spec-card{padding:18px}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .site-footer{padding:44px 0 22px;margin-top:56px}
  .footer-bottom{flex-direction:column;gap:6px}
}
@media (max-width:480px){
  .container{padding:0 16px}
  .hero{padding:28px 16px}
  .hero-actions .btn{width:100%}
  .login-card{padding:18px}
  .btn{font-size:14px;padding:0 18px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:.001ms!important;animation-duration:.001ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important}
  .btn:hover,.feature-card:hover,.spec-card:hover,.review-card:hover,.dl-btn:hover{transform:none}
}

/* roulang page: article */
:root{
  --brand-700:#0F3F91;
  --brand-600:#1554C0;
  --brand-500:#2E6ED8;
  --brand-050:#EDF3FD;
  --accent-500:#FF7A2F;
  --ink-900:#101B2D;
  --ink-700:#2A3648;
  --ink-500:#6B7A90;
  --line:#E4E9F2;
  --bg-page:#F5F7FB;
  --bg-card:#FFFFFF;
  --bg-dark:#0A2A5E;
  --success:#12A594;
  --warning:#E8A33D;
  --danger:#D9453F;
  --r-badge:999px;
  --r-btn:10px;
  --r-input:10px;
  --r-card:14px;
  --r-block:18px;
  --r-img:12px;
  --sh-1:0 1px 3px rgba(16,27,45,.06);
  --sh-2:0 4px 14px rgba(16,27,45,.07);
  --sh-3:0 12px 28px rgba(16,27,45,.12);
  --sidebar-w:248px;
}
*,*::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","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;line-height:1.75;color:var(--ink-700);background:var(--bg-page);
  -webkit-font-smoothing:antialiased;
}
img,svg{display:block;max-width:100%}
img{border:0;background:#EDF1F8}
a{color:var(--brand-600);text-decoration:none;transition:color .16s ease}
a:hover{color:var(--brand-700)}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
input{font:inherit}
h1,h2,h3,h4,p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:3px solid rgba(21,84,192,.32);outline-offset:2px;border-radius:6px}

/* ---------- 左侧竖向导航 ---------- */
.sidenav{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
  background:var(--bg-card);border-right:1px solid var(--line);
  display:flex;flex-direction:column;gap:20px;
  padding:26px 18px 20px;z-index:80;overflow-y:auto;
}
.brand{display:flex;flex-direction:column;gap:1px;padding:6px 10px 10px;border-bottom:1px solid var(--line)}
.brand-main{font-size:19px;font-weight:800;color:var(--ink-900);letter-spacing:.5px;line-height:1.3}
.brand-sub{font-size:12px;letter-spacing:.5px;color:#6B7A90;line-height:1.4}
.nav-group-title{font-size:12px;letter-spacing:1px;color:#8A97AC;padding:0 12px;margin-bottom:6px}
.nav-list{display:flex;flex-direction:column;gap:4px}
.nav-item{
  position:relative;display:flex;align-items:center;gap:10px;height:44px;padding:0 12px;
  border-radius:var(--r-btn);font-size:15px;font-weight:500;color:var(--ink-700);
  transition:background .12s ease,color .12s ease;
}
.nav-item svg{width:20px;height:20px;flex:0 0 20px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.nav-item:hover{background:#F1F5FC;color:var(--brand-600)}
.nav-item.active{background:var(--brand-050);color:var(--brand-600);font-weight:700}
.nav-item.active::before{content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:3px;background:var(--brand-600)}
.nav-extra{margin-top:auto;display:flex;flex-direction:column;gap:12px;padding-top:18px;border-top:1px solid var(--line)}
.nav-copy{font-size:11px;line-height:1.6;color:var(--ink-500);padding:0 2px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:transform .16s ease,background .16s ease,box-shadow .16s ease,color .16s ease,border-color .16s ease;
}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(1px);box-shadow:none}
.btn-outline{background:#fff;color:var(--brand-600);border:1px solid var(--brand-600)}
.btn-outline:hover{background:var(--brand-050);color:var(--brand-700)}
.btn-accent{background:var(--accent-500);color:#fff;box-shadow:var(--sh-1)}
.btn-accent:hover{background:#E96A1F;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.55)}
.btn-ghost:hover{background:rgba(255,255,255,.14);color:#fff}
.btn-block{width:100%}

/* ---------- 页面骨架 ---------- */
.page{padding-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column}
main{flex:1}
.container{width:100%;max-width:1160px;margin:0 auto;padding:0 40px}

/* ---------- 移动端顶栏 ---------- */
.mobilebar{
  display:none;position:fixed;top:0;left:0;right:0;height:60px;z-index:90;
  background:rgba(255,255,255,.96);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);align-items:center;justify-content:space-between;padding:0 16px;
}
.mobilebar .brand{padding:0;border:0;gap:0}
.mobilebar .brand-main{font-size:17px}
.mobilebar .brand-sub{font-size:11px;letter-spacing:.5px;color:#6B7A90}
.nav-toggle{width:42px;height:42px;border-radius:10px;border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;background:#fff}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-900);position:relative;transition:background .16s}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink-900);transition:transform .2s ease}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

.drawer-mask{position:fixed;inset:0;background:rgba(10,20,40,.45);opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease;z-index:99}
.drawer-mask.open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);background:#fff;z-index:100;
  transform:translateX(100%);transition:transform .24s ease;
  padding:22px 20px 26px;display:flex;flex-direction:column;gap:18px;overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer .drawer-close{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;align-self:flex-end;color:var(--ink-500)}
.drawer .nav-item{height:48px}

/* ---------- 面包屑 ---------- */
.article-shell{padding:34px 0 8px}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--ink-500)}
.breadcrumb li{display:flex;align-items:center;min-width:0}
.breadcrumb li+li::before{content:"/";margin-right:8px;color:#C3CDDD}
.breadcrumb a{color:var(--ink-500)}
.breadcrumb a:hover{color:var(--brand-600)}
.crumb-current{max-width:240px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--ink-700)}

/* ---------- 文章头部 ---------- */
.article-head{margin-top:24px;padding-bottom:22px;border-bottom:1px solid var(--line)}
.article-head h1{font-size:clamp(26px,3vw,36px);font-weight:800;line-height:1.35;color:var(--ink-900);max-width:860px}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:16px;font-size:13.5px;color:var(--ink-500)}
.article-meta .dot{color:#C3CDDD}
.badge-cat{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-badge);background:var(--brand-050);color:var(--brand-600);font-size:12px;font-weight:600}

/* ---------- 正文 ---------- */
.article-body{
  max-width:760px;margin:34px auto 0;
  font-size:17px;line-height:1.9;color:var(--ink-700);
}
.article-body>*:first-child{margin-top:0}
.article-body p{margin:0 0 20px}
.article-body h2{
  position:relative;font-size:22px;font-weight:700;line-height:1.5;color:var(--ink-900);
  margin:40px 0 12px;padding-left:14px;
}
.article-body h2::before{content:"";position:absolute;left:0;top:5px;bottom:5px;width:4px;border-radius:2px;background:var(--brand-600)}
.article-body h3{font-size:19px;font-weight:700;line-height:1.5;color:var(--ink-900);margin:28px 0 10px}
.article-body strong{color:var(--ink-900)}
.article-body ul{margin:0 0 20px}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:8px;line-height:1.9}
.article-body ul li::before{content:"";position:absolute;left:4px;top:12px;width:6px;height:6px;border-radius:50%;background:var(--brand-500)}
.article-body ol{margin:0 0 20px;counter-reset:olc}
.article-body ol li{position:relative;padding-left:28px;margin-bottom:8px;line-height:1.9;counter-increment:olc}
.article-body ol li::before{content:counter(olc) ".";position:absolute;left:0;top:0;color:var(--brand-600);font-weight:700}
.article-body blockquote{margin:24px 0;padding:16px 20px;border-left:4px solid var(--brand-600);background:#F4F7FD;border-radius:0 var(--r-img) var(--r-img) 0;color:var(--ink-700)}
.article-body img{border-radius:var(--r-img);margin:24px auto;height:auto;box-shadow:var(--sh-1)}
.article-body figure{margin:24px 0}
.article-body figcaption{font-size:13px;color:var(--ink-500);text-align:center;margin-top:8px}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;background:#fff}
.article-body th{background:#F4F7FD;color:var(--ink-900);font-weight:600;text-align:left}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px}
.article-body a{color:var(--brand-600);border-bottom:1px solid rgba(21,84,192,.35)}
.article-body a:hover{border-bottom-color:var(--brand-700)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0}

/* ---------- 空态 ---------- */
.empty-state{
  max-width:760px;margin:40px auto 0;text-align:center;padding:56px 24px;
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-block);box-shadow:var(--sh-1);
}
.empty-state svg{width:52px;height:52px;margin:0 auto 16px;stroke:var(--brand-500);fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.empty-title{font-size:19px;font-weight:700;color:var(--ink-900);margin-bottom:8px}
.empty-desc{font-size:15px;color:var(--ink-500);line-height:1.8;max-width:460px;margin:0 auto 22px}

/* ---------- 文末操作 ---------- */
.article-foot{
  max-width:760px;margin:38px auto 0;padding-top:24px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
}
.tag-list{display:flex;flex-wrap:wrap;gap:8px}
.tag{display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:var(--r-badge);background:#fff;border:1px solid var(--line);font-size:13px;color:var(--ink-500)}
.back-link{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--brand-600)}
.back-link svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.back-link:hover svg{transform:translateX(-2px)}
.back-link svg{transition:transform .16s ease}
.share-group{display:flex;gap:8px}
.share-btn{
  width:36px;height:36px;border-radius:var(--r-btn);border:1px solid var(--line);background:#fff;
  display:inline-flex;align-items:center;justify-content:center;color:var(--ink-500);
  transition:background .16s ease,color .16s ease,border-color .16s ease;
}
.share-btn svg{width:17px;height:17px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.share-btn:hover{background:var(--brand-050);color:var(--brand-600);border-color:#CFE0FA}

/* ---------- 相关阅读 ---------- */
.related{padding:68px 0 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:22px}
.section-head h2{font-size:clamp(22px,2.4vw,28px);font-weight:700;color:var(--ink-900);line-height:1.35}
.section-head .more{font-size:14.5px;font-weight:600}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.post-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-1);
  transition:box-shadow .16s ease-out,transform .16s ease-out;
}
.post-card:hover{box-shadow:var(--sh-3);transform:translateY(-2px)}
.post-thumb{aspect-ratio:16/9;overflow:hidden;background:#EDF1F8}
.post-thumb img{width:100%;height:100%;object-fit:cover}
.post-body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:8px;flex:1}
.post-title{font-size:16px;font-weight:700;line-height:1.55;color:var(--ink-900);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card:hover .post-title{color:var(--brand-600)}
.post-desc{font-size:14px;line-height:1.7;color:var(--ink-500);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12.5px;color:var(--ink-500);padding-top:6px}

/* ---------- 结尾 CTA ---------- */
.cta-wrap{padding:72px 0 0}
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-block);
  background:var(--brand-700);color:#fff;padding:56px 48px;
}
.cta-inner{position:relative;z-index:2;max-width:720px}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);font-weight:800;line-height:1.35;color:#fff}
.cta-band p{margin-top:14px;font-size:16px;line-height:1.8;color:#C7D5EA;max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.cta-arc{position:absolute;right:-60px;bottom:-90px;width:420px;height:280px;opacity:.5;z-index:1}
.cta-arc path{fill:none;stroke:rgba(255,255,255,.16);stroke-width:2}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-dark);color:#C7D5EA;margin-top:96px;padding:56px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px}
.footer-brand{color:#fff;font-size:17px;font-weight:700;margin-bottom:10px;letter-spacing:.3px}
.footer-desc{font-size:14px;line-height:1.85;color:#A9BDDB;max-width:320px}
.site-footer h4{color:#fff;font-size:14px;font-weight:600;margin-bottom:14px;letter-spacing:.4px}
.site-footer ul li{margin-bottom:10px;font-size:14px;color:#A9BDDB;line-height:1.7}
.site-footer a{color:#C7D5EA}
.site-footer a:hover{color:#fff;text-decoration:underline;text-underline-offset:2px}
.footer-bottom{
  margin-top:38px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:#8FA6C9;
}

/* ---------- 断点 ---------- */
@media (min-width:1440px){
  :root{--sidebar-w:272px}
}
@media (max-width:1279px){
  :root{--sidebar-w:200px}
  .container{padding:0 28px}
  .nav-item{font-size:14.5px;padding:0 10px}
}
@media (max-width:1023px){
  :root{--sidebar-w:0px}
  .sidenav{display:none}
  .mobilebar{display:flex}
  .page{padding-left:0;padding-top:60px}
  .container{padding:0 24px}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .cta-band{padding:44px 32px;border-radius:var(--r-card)}
  .site-footer{margin-top:64px}
}
@media (max-width:767px){
  body{font-size:15.5px}
  .container{padding:0 18px}
  .article-shell{padding-top:24px}
  .article-body{font-size:16.5px;line-height:1.85;margin-top:26px}
  .article-body h2{font-size:20px;margin-top:32px}
  .article-body h3{font-size:17.5px}
  .crumb-current{max-width:130px}
  .related-grid{grid-template-columns:1fr}
  .article-foot{flex-direction:column;align-items:flex-start}
  .cta-band{padding:36px 22px}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .btn{height:48px;padding:0 18px;font-size:15px}
  .cta-actions .btn{width:100%}
  .article-head h1{font-size:24px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none !important;animation:none !important;scroll-behavior:auto !important}
}

/* roulang page: category1 */
:root{
  --brand-700:#0F3F91;
  --brand-600:#1554C0;
  --brand-500:#2E6ED8;
  --brand-050:#EDF3FD;
  --accent-500:#FF7A2F;
  --ink-900:#101B2D;
  --ink-700:#2A3648;
  --ink-500:#6B7A90;
  --line:#E4E9F2;
  --bg-page:#F5F7FB;
  --bg-card:#FFFFFF;
  --bg-dark:#0A2A5E;
  --success:#12A594;
  --warning:#E8A33D;
  --danger:#D9453F;
  --radius-badge:999px;
  --radius-btn:10px;
  --radius-card:14px;
  --radius-lg:18px;
  --radius-img:12px;
  --sh-1:0 1px 3px rgba(16,27,45,.06);
  --sh-2:0 4px 14px rgba(16,27,45,.07);
  --sh-3:0 12px 28px rgba(16,27,45,.12);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink-700);
  background:var(--bg-page);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand-600);text-decoration:none}
a:hover{color:var(--brand-700)}
button,input{font-family:inherit;font-size:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:3px solid rgba(21,84,192,.35);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:1160px;margin:0 auto;padding:0 40px}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ============ 移动端顶栏 ============ */
.mobilebar{
  display:none;position:fixed;top:0;left:0;right:0;height:60px;z-index:50;
  align-items:center;justify-content:space-between;padding:0 16px;
  background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--sh-1);
}
.mobilebar .brand{display:flex;flex-direction:column;gap:1px;text-decoration:none}
.brand-main{font-size:19px;font-weight:800;color:var(--ink-900);letter-spacing:.5px;line-height:1.2}
.brand-sub{font-size:12px;letter-spacing:.5px;color:var(--ink-500);line-height:1.2}
.nav-toggle{
  width:42px;height:42px;border:1px solid var(--line);border-radius:10px;background:#fff;
  display:grid;place-items:center;cursor:pointer;transition:background .12s ease,border-color .12s ease;
}
.nav-toggle:hover{background:var(--brand-050);border-color:var(--brand-500)}
.nav-toggle span{position:relative;display:block;width:18px;height:2px;background:var(--ink-900);border-radius:2px}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink-900);border-radius:2px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ============ 左侧竖向导航 ============ */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:248px;z-index:40;
  display:flex;flex-direction:column;padding:28px 20px 20px;
  background:#fff;border-right:1px solid var(--line);overflow-y:auto;
}
.sidebar .brand{
  display:flex;flex-direction:column;gap:2px;padding:0 8px 20px;margin-bottom:14px;
  border-bottom:1px solid var(--line);text-decoration:none;
}
.nav-group-title{font-size:12px;letter-spacing:1px;color:#8A97AC;margin:14px 8px 8px}
.side-nav{display:flex;flex-direction:column;gap:4px}
.nav-item{
  position:relative;display:flex;align-items:center;gap:10px;height:44px;padding:0 12px;
  border-radius:10px;font-size:15px;color:var(--ink-700);text-decoration:none;
  transition:background .12s ease,color .12s ease;
}
.nav-item svg{width:20px;height:20px;flex:none}
.nav-item:hover{background:#F1F5FC;color:var(--brand-600)}
.nav-item.is-active{background:var(--brand-050);color:var(--brand-600);font-weight:600}
.nav-item.is-active::before{
  content:"";position:absolute;left:-2px;top:10px;bottom:10px;width:3px;border-radius:3px;background:var(--brand-600);
}
.side-foot{margin-top:auto;padding-top:20px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:12px}
.side-copy{font-size:12px;line-height:1.6;color:#8A97AC}

/* ============ 抽屉 ============ */
.drawer-mask{
  position:fixed;inset:0;background:rgba(10,20,40,.45);z-index:55;
  opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease;
}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);z-index:60;
  background:#fff;padding:22px 20px;display:flex;flex-direction:column;gap:6px;overflow-y:auto;
  transform:translateX(100%);transition:transform .24s ease;box-shadow:-8px 0 28px rgba(16,27,45,.16);
}
body.drawer-open .drawer{transform:translateX(0)}
body.drawer-open .drawer-mask{opacity:1;visibility:visible}
.drawer-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.drawer-close{
  width:36px;height:36px;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;
  color:var(--ink-500);font-size:18px;line-height:1;display:grid;place-items:center;
}
.drawer-close:hover{background:var(--brand-050);color:var(--brand-600)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:16px;font-weight:600;line-height:1;border:1px solid transparent;cursor:pointer;
  text-decoration:none;transition:background .16s ease,color .16s ease,box-shadow .16s ease,transform .16s ease,border-color .16s ease;
  white-space:nowrap;
}
.btn svg{width:18px;height:18px;flex:none}
.btn-primary{background:var(--brand-600);color:#fff}
.btn-primary:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(1px);box-shadow:none}
.btn-outline{background:#fff;border-color:var(--brand-600);color:var(--brand-600)}
.btn-outline:hover{background:var(--brand-050);color:var(--brand-700);border-color:var(--brand-700)}
.btn-accent{background:var(--accent-500);color:#fff}
.btn-accent:hover{background:#F0691C;color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(255,122,47,.28)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.55);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff}
.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:9px}
.btn-block{width:100%}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand-600)}
.text-link svg{width:16px;height:16px;transition:transform .16s ease}
.text-link:hover svg{transform:translateX(2px)}

/* ============ 主体 ============ */
.main-wrap{min-height:100vh;display:flex;flex-direction:column}
main{flex:1 1 auto}
.section{padding:88px 0}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:36px}
.section-head h2{
  font-size:clamp(24px,2.8vw,32px);line-height:1.35;font-weight:700;color:var(--ink-900);
  margin:0 0 12px;
}
.section-head p{font-size:16px;color:var(--ink-500);line-height:1.8}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:1px;
  color:var(--brand-600);margin-bottom:14px;
}
.eyebrow::before{content:"";width:20px;height:2px;border-radius:2px;background:var(--accent-500)}

/* ============ 分类 Hero ============ */
.hero-cat{
  position:relative;overflow:hidden;
  background:
    linear-gradient(96deg,rgba(255,255,255,.96) 0%,rgba(255,255,255,.90) 52%,rgba(237,243,253,.88) 100%),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  border-bottom:1px solid var(--line);
}
.hero-cat-inner{position:relative;z-index:2;padding:64px 0 58px;min-height:288px;display:flex;flex-direction:column;justify-content:center}
.hero-cat h1{
  font-size:clamp(28px,3.6vw,42px);font-weight:800;line-height:1.25;color:var(--ink-900);
  margin:0 0 14px;max-width:820px;
}
.hero-cat h1 .h1-tail{display:block;font-size:clamp(15px,1.6vw,19px);font-weight:600;color:var(--brand-600);margin-top:10px;letter-spacing:.5px}
.hero-cat p.hero-lead{font-size:17px;line-height:1.8;color:#3C4A60;max-width:640px;margin-bottom:26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.crumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-500);margin-bottom:18px}
.crumb ol{display:flex;align-items:center;gap:8px}
.crumb li{display:flex;align-items:center;gap:8px}
.crumb li+li::before{content:"/";color:#B9C4D6}
.crumb a{color:var(--ink-500)}
.crumb a:hover{color:var(--brand-600)}

/* ============ 通用卡片 ============ */
.card{
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--sh-1);
  transition:box-shadow .16s ease,transform .16s ease,border-color .16s ease;
}
.card-hover:hover{box-shadow:var(--sh-3);transform:translateY(-2px);border-color:#D6E0F2}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--radius-badge);
  font-size:12px;font-weight:600;background:var(--brand-050);color:var(--brand-600);
}
.badge-accent{background:rgba(255,122,47,.12);color:#C4551A}
.badge-dark{background:var(--bg-dark);color:#fff}

/* ============ 介绍区：左宽图文 + 右窄列表 ============ */
.intro-grid{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:32px;align-items:start}
.intro-main{display:flex;flex-direction:column;gap:32px}
.intro-block{padding:28px 30px}
.intro-block h3{font-size:20px;font-weight:700;color:var(--ink-900);line-height:1.45;margin:0 0 14px}
.intro-block p{font-size:16px;line-height:1.85;color:var(--ink-700);max-width:660px;margin-bottom:14px}
.intro-block p:last-of-type{margin-bottom:18px}
.intro-figure{margin-top:6px;border-radius:var(--radius-img);overflow:hidden;border:1px solid var(--line);background:#EDF1F8}
.intro-figure img{width:100%;aspect-ratio:16/9;object-fit:cover}
.intro-figure figcaption{font-size:13px;color:var(--ink-500);text-align:center;padding:10px 12px;background:#fff}
.figure-inline{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:24px;align-items:center}
.figure-inline .intro-figure{margin-top:0}
.intro-side{padding:24px;position:sticky;top:24px}
.intro-side h3{font-size:17px;font-weight:700;color:var(--ink-900);margin:0 0 6px}
.intro-side .side-note{font-size:13px;color:var(--ink-500);margin-bottom:16px}
.side-list{display:flex;flex-direction:column;gap:6px}
.side-list li{
  display:flex;gap:12px;align-items:flex-start;padding:12px 12px;border-radius:10px;
  transition:background .14s ease;
}
.side-list li:hover{background:var(--brand-050)}
.side-list .num{
  flex:none;width:24px;height:24px;border-radius:8px;background:var(--brand-050);color:var(--brand-600);
  font-size:13px;font-weight:700;display:grid;place-items:center;margin-top:1px;
  font-variant-numeric:tabular-nums;
}
.side-list .side-title{font-size:15px;font-weight:600;color:var(--ink-900);line-height:1.5}
.side-list .side-desc{font-size:13px;color:var(--ink-500);line-height:1.6;margin-top:2px}
.side-divider{height:1px;background:var(--line);margin:18px 0}

/* ============ 内容卡片区 ============ */
.card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.media-card{display:flex;flex-direction:column;overflow:hidden;text-decoration:none;color:inherit}
.media-card .media{background:#EDF1F8;border-bottom:1px solid var(--line)}
.media-card .media img{width:100%;aspect-ratio:16/9;object-fit:cover}
.media-card .media-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:12px;flex:1 1 auto}
.media-card h3{font-size:18px;font-weight:700;color:var(--ink-900);line-height:1.5}
.media-card p{font-size:15px;line-height:1.8;color:var(--ink-700);margin:0}
.media-card .media-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px}
.media-card:hover h3{color:var(--brand-600)}
.media-card:hover .text-link svg{transform:translateX(2px)}

/* ============ 规格卡 ============ */
.spec-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.spec-card{padding:26px 28px}
.spec-card h3{font-size:18px;font-weight:700;color:var(--ink-900);margin:0 0 6px}
.spec-card .spec-tip{font-size:13px;color:var(--ink-500);margin-bottom:16px}
.spec-card dl{margin:0}
.spec-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:13px 0;border-bottom:1px dashed var(--line)}
.spec-row:last-child{border-bottom:0;padding-bottom:0}
.spec-row dt{font-size:14px;color:var(--ink-500)}
.spec-row dd{margin:0;font-size:15px;font-weight:600;color:var(--ink-900);text-align:right;font-variant-numeric:tabular-nums}

/* ============ FAQ ============ */
.faq-wrap{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.6fr);gap:40px;align-items:start}
.faq-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--sh-1);padding:6px 26px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:last-child{border-bottom:0}
.faq-item summary{
  position:relative;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:16px 0;font-size:17px;font-weight:600;color:var(--ink-900);
  cursor:pointer;list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"＋";flex:none;font-size:18px;font-weight:500;color:var(--brand-600);
  transition:transform .2s ease;line-height:1;
}
.faq-item[open] summary{color:var(--brand-600)}
.faq-item[open] summary::after{content:"－";transform:rotate(180deg)}
.faq-item[open] summary::before{
  content:"";position:absolute;left:-26px;top:16px;bottom:16px;width:3px;border-radius:3px;background:var(--brand-600);
}
.faq-item .faq-a{padding:0 0 20px;font-size:15px;line-height:1.85;color:var(--ink-700);max-width:720px}
.faq-side{padding:26px 28px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--sh-1)}
.faq-side h3{font-size:18px;font-weight:700;color:var(--ink-900);margin:0 0 10px}
.faq-side p{font-size:15px;line-height:1.8;color:var(--ink-700);margin-bottom:16px}
.faq-side ul{display:flex;flex-direction:column;gap:10px;margin-bottom:20px}
.faq-side li{position:relative;padding-left:16px;font-size:14px;color:var(--ink-500);line-height:1.7}
.faq-side li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--brand-500)}

/* ============ CTA ============ */
.cta-band{position:relative;overflow:hidden;background:var(--bg-dark);padding:64px 0;text-align:center}
.cta-band::before{
  content:"";position:absolute;width:520px;height:520px;border:1px solid rgba(255,255,255,.06);
  border-radius:50%;right:-160px;top:-240px;
}
.cta-band::after{
  content:"";position:absolute;width:320px;height:320px;border:1px solid rgba(255,255,255,.06);
  border-radius:50%;left:-120px;bottom:-200px;
}
.cta-inner{position:relative;z-index:2;max-width:760px;margin:0 auto}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;line-height:1.4;color:#fff;margin:0 0 14px}
.cta-band p{font-size:16px;line-height:1.8;color:#C7D5EA;margin:0 auto 28px;max-width:620px}
.cta-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:12px}

/* ============ 页脚 ============ */
.site-footer{background:var(--bg-dark);color:#C7D5EA}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:32px;padding:56px 0 34px}
.footer-brand{color:#fff;font-size:18px;font-weight:700;margin-bottom:12px;letter-spacing:.5px}
.footer-desc{font-size:14px;line-height:1.8;color:#C7D5EA;max-width:320px}
.site-footer h4{color:#fff;font-size:14px;font-weight:700;margin:0 0 14px;letter-spacing:.5px}
.site-footer ul{display:flex;flex-direction:column;gap:10px}
.site-footer a,.site-footer li{font-size:14px;color:#C7D5EA;line-height:1.7}
.site-footer a:hover{color:#fff;text-decoration:underline;text-underline-offset:2px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.14);padding:18px 0 26px;
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:13px;color:#9FB3D1;
}

/* ============ 响应式 ============ */
@media (min-width:1024px){
  .mobilebar{display:none}
  .main-wrap{margin-left:200px}
  .sidebar{width:200px}
  .side-copy{display:none}
}
@media (min-width:1280px){
  .main-wrap{margin-left:248px}
  .sidebar{width:248px}
  .side-copy{display:block}
}
@media (min-width:1440px){
  .main-wrap{margin-left:272px}
  .sidebar{width:272px}
}
@media (max-width:1023px){
  .sidebar{display:none}
  .drawer,.drawer-mask{display:none}
  body.drawer-open .drawer,body.drawer-open .drawer-mask{display:flex}
  body.drawer-open .drawer-mask{display:block}
  .mobilebar{display:flex}
  .main-wrap{margin-left:0;padding-top:60px}
  .section{padding:64px 0}
  .intro-grid{grid-template-columns:minmax(0,1fr)}
  .intro-side{position:static}
  .faq-wrap{grid-template-columns:minmax(0,1fr);gap:28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;padding:44px 0 28px}
}
@media (min-width:1024px){
  .drawer,.drawer-mask{display:none !important}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .hero-cat-inner{padding:48px 0 44px;min-height:260px}
  .hero-cat p.hero-lead{font-size:16px}
  .card-grid,.spec-grid{grid-template-columns:minmax(0,1fr)}
  .figure-inline{grid-template-columns:minmax(0,1fr)}
  .intro-block{padding:22px 20px}
  .spec-card{padding:22px 20px}
  .faq-list{padding:4px 18px}
  .faq-item[open] summary::before{left:-18px}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .cta-band{padding:52px 0}
}
@media (max-width:480px){
  .hero-actions .btn,.cta-actions .btn{width:100%}
  .cta-actions{flex-direction:column}
  .media-card .media-body{padding:18px 18px 20px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
}

/* roulang page: category2 */
:root{
  --brand-700:#0F3F91;
  --brand-600:#1554C0;
  --brand-500:#2E6ED8;
  --brand-050:#EDF3FD;
  --accent-500:#FF7A2F;
  --ink-900:#101B2D;
  --ink-700:#2A3648;
  --ink-500:#6B7A90;
  --line:#E4E9F2;
  --bg-page:#F5F7FB;
  --bg-card:#FFFFFF;
  --bg-dark:#0A2A5E;
  --success:#12A594;
  --warning:#E8A33D;
  --danger:#D9453F;
  --radius-badge:999px;
  --radius-btn:10px;
  --radius-card:14px;
  --radius-block:18px;
  --radius-img:12px;
  --sh-1:0 1px 3px rgba(16,27,45,.06);
  --sh-2:0 4px 14px rgba(16,27,45,.07);
  --sh-3:0 12px 28px rgba(16,27,45,.12);
  --sidebar-w:248px;
  --container:1160px;
}
*,*::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","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;line-height:1.75;color:var(--ink-700);background:var(--bg-page);
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
h1,h2,h3,h4{margin:0;color:var(--ink-900);line-height:1.35}
h1{font-size:clamp(30px,4vw,44px);font-weight:800;line-height:1.25}
h2{font-size:clamp(24px,2.8vw,32px);font-weight:700}
h3{font-size:20px;font-weight:700;line-height:1.45}
h4{font-size:17px;font-weight:600;line-height:1.5}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:var(--brand-600);text-decoration:none;transition:color .12s ease}
a:hover{color:var(--brand-700)}
img{max-width:100%;display:block}
button{font:inherit}
:focus-visible{outline:3px solid rgba(21,84,192,.30);outline-offset:2px;border-radius:8px}

/* ---------- 布局骨架 ---------- */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 40px}
.page{margin-left:var(--sidebar-w);min-height:100vh}

/* ---------- 品牌 ---------- */
.brand{display:flex;flex-direction:column;gap:2px;padding:8px 12px 22px;text-decoration:none;transition:none}
.brand-main{font-size:19px;font-weight:800;color:var(--ink-900);letter-spacing:.5px;line-height:1.3}
.brand-sub{font-size:12.5px;color:#6B7A90;letter-spacing:.5px;line-height:1.4}

/* ---------- 左侧竖导航 ---------- */
.sidenav{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
  display:flex;flex-direction:column;
  padding:24px 16px;background:#fff;border-right:1px solid var(--line);
  z-index:60;overflow-y:auto;
}
.sidenav-nav{display:flex;flex-direction:column;gap:4px;margin-top:6px}
.nav-group-title{font-size:12px;letter-spacing:1px;color:#8A97AC;padding:6px 12px 10px}
.nav-item{
  position:relative;display:flex;align-items:center;gap:10px;
  height:44px;padding:0 12px;border-radius:var(--radius-btn);
  color:var(--ink-700);font-size:15px;
  transition:background .12s ease,color .12s ease;
}
.nav-item svg{width:20px;height:20px;flex:none;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.nav-item:hover{background:#F1F5FC;color:var(--brand-600)}
.nav-item.active{background:var(--brand-050);color:var(--brand-600);font-weight:700}
.nav-item.active::before{content:"";position:absolute;left:-16px;top:9px;bottom:9px;width:3px;border-radius:0 3px 3px 0;background:var(--brand-600)}
.sidenav-foot{margin-top:auto;padding-top:18px;border-top:1px solid var(--line)}
.sidenav-copy{margin-top:12px;padding:0 4px;font-size:12px;color:var(--ink-500);line-height:1.6}

/* ---------- 顶部移动导航 ---------- */
.mobilebar{
  display:none;position:fixed;top:0;left:0;right:0;height:60px;z-index:70;
  align-items:center;justify-content:space-between;padding:0 16px;
  background:rgba(255,255,255,.96);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.mobilebar .brand{flex-direction:row;align-items:baseline;gap:6px;padding:0}
.mobilebar .brand-main{font-size:17px}
.mobilebar .brand-sub{font-size:12px}
.nav-toggle{
  width:40px;height:40px;border-radius:var(--radius-btn);
  border:1px solid var(--line);background:#fff;cursor:pointer;
  display:inline-flex;align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-900);position:relative;border-radius:2px}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink-900);border-radius:2px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ---------- 抽屉 ---------- */
.drawer{position:fixed;inset:0;z-index:80;visibility:hidden}
.drawer.open{visibility:visible}
.drawer-mask{position:absolute;inset:0;background:rgba(10,20,40,.45);opacity:0;transition:opacity .24s ease}
.drawer.open .drawer-mask{opacity:1}
.drawer-panel{
  position:absolute;top:0;right:0;bottom:0;width:280px;max-width:84vw;
  background:#fff;padding:22px 20px;overflow-y:auto;
  transform:translateX(100%);transition:transform .24s ease;box-shadow:var(--sh-3);
}
.drawer.open .drawer-panel{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;margin-bottom:18px;border-bottom:1px solid var(--line)}
.drawer-close{width:36px;height:36px;border-radius:var(--radius-btn);border:1px solid var(--line);background:#fff;color:var(--ink-700);font-size:20px;line-height:1;cursor:pointer}
.drawer-close:hover{background:#F1F5FC;color:var(--brand-600)}
.drawer-nav{display:flex;flex-direction:column;gap:6px;margin-bottom:24px}
.drawer-nav a{display:block;padding:12px 12px;border-radius:var(--radius-btn);color:var(--ink-700);font-size:15px}
.drawer-nav a:hover{background:#F1F5FC;color:var(--brand-600)}
.drawer-nav a.active{background:var(--brand-050);color:var(--brand-600);font-weight:700}
.drawer-foot{display:flex;flex-direction:column;gap:10px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--radius-btn);
  border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;
  white-space:nowrap;text-align:center;
  transition:background .16s ease,color .16s ease,box-shadow .16s ease,transform .16s ease,border-color .16s ease;
}
.btn-primary{background:var(--brand-600);color:#fff}
.btn-primary:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px);box-shadow:0 8px 18px rgba(21,84,192,.28)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-outline{background:#fff;color:var(--brand-600);border-color:var(--brand-600)}
.btn-outline:hover{background:var(--brand-050);color:var(--brand-700)}
.btn-accent{background:var(--accent-500);color:#fff}
.btn-accent:hover{background:#E96A1F;color:#fff;transform:translateY(-1px);box-shadow:0 8px 18px rgba(233,106,31,.28)}
.btn-ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
.btn-ghost-light:hover{background:rgba(255,255,255,.12);color:#fff}
.btn-sm{height:42px;font-size:14px;padding:0 16px}
.btn-block{width:100%}

/* ---------- 分类 Hero ---------- */
.cat-hero{
  position:relative;overflow:hidden;
  padding:64px 0 68px;min-height:300px;
  background-color:#EAF1FB;
  background-image:linear-gradient(rgba(255,255,255,.88),rgba(255,255,255,.96)),url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.cat-hero::after{
  content:"";position:absolute;right:-120px;top:-150px;width:440px;height:440px;
  border-radius:50%;border:1px solid rgba(21,84,192,.10);pointer-events:none;
}
.cat-hero .container{position:relative;z-index:1}
.crumb{font-size:14px;color:var(--ink-500);margin-bottom:18px}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.crumb li{display:flex;align-items:center;gap:6px}
.crumb li+li::before{content:"/";color:#B6C1D3}
.crumb a{color:var(--ink-500)}
.crumb a:hover{color:var(--brand-600)}
.crumb li:last-child{color:var(--ink-700)}
.cat-hero h1{max-width:860px}
.cat-hero-sub{margin-top:16px;max-width:700px;font-size:18px;line-height:1.7;color:#3C4A60}
.trust-line{margin-top:20px;font-size:13px;color:var(--ink-500);letter-spacing:.2px}

/* ---------- 板块通用 ---------- */
.section{padding:88px 0}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:740px;margin-bottom:40px}
.sec-head h2{margin-bottom:12px}
.sec-head p{font-size:16px;color:var(--ink-500);line-height:1.8}

/* ---------- 图文介绍 ---------- */
.intro-media{border-radius:var(--radius-block);overflow:hidden;background:#EDF1F8;box-shadow:var(--sh-2);position:relative}
.intro-media img{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover}
.intro-copy{margin-top:36px}
.intro-copy h2{margin-bottom:20px}
.intro-cols{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.intro-cols p{font-size:16px;line-height:1.85;color:var(--ink-700)}
.intro-cols p strong{color:var(--ink-900);font-weight:600}

/* ---------- 步骤条 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step{position:relative;padding-right:8px}
.step::after{content:"";position:absolute;top:23px;left:58px;right:-24px;height:2px;background:var(--line)}
.step:last-child::after{display:none}
.step-num{
  position:relative;z-index:1;
  display:inline-flex;align-items:center;justify-content:center;
  width:46px;height:46px;border-radius:50%;
  background:#fff;border:1px solid #D7E3F8;
  color:var(--brand-600);font-size:15px;font-weight:800;letter-spacing:.5px;
  font-variant-numeric:tabular-nums;
}
.step h3{margin:18px 0 8px;font-size:17px;font-weight:600}
.step p{font-size:15px;line-height:1.75;color:var(--ink-500)}

/* ---------- 卡片 ---------- */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.card{
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--sh-2);overflow:hidden;
  transition:box-shadow .16s ease,transform .16s ease;
}
.card:hover{box-shadow:var(--sh-3);transform:translateY(-2px)}
.card-media{aspect-ratio:16/9;background:#EDF1F8;overflow:hidden}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:22px 24px 24px}
.card-body h3{margin:12px 0 10px;font-size:19px}
.card-body p{font-size:15px;line-height:1.75;color:var(--ink-500)}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:var(--radius-badge);background:var(--brand-050);color:var(--brand-600);
  font-size:12px;font-weight:600;letter-spacing:.2px;
}
.text-link{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-size:14px;font-weight:600;color:var(--brand-600)}
.text-link svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .16s ease}
.text-link:hover svg{transform:translateX(3px)}

/* ---------- FAQ ---------- */
.faq{display:flex;flex-direction:column;gap:12px;max-width:900px}
.faq details{
  position:relative;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);box-shadow:var(--sh-1);
  transition:box-shadow .16s ease;
}
.faq details[open]{box-shadow:var(--sh-2)}
.faq details[open]::before{content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:0 3px 3px 0;background:var(--brand-600)}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:14px 20px 14px 22px;
  font-size:17px;font-weight:600;color:var(--ink-900);cursor:pointer;list-style:none;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{color:var(--brand-600)}
.faq-icon{position:relative;flex:none;width:20px;height:20px}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;
  background:var(--brand-600);border-radius:2px;transform:translate(-50%,-50%);
}
.faq-icon::before{width:14px;height:2px}
.faq-icon::after{width:2px;height:14px;transition:transform .2s ease,opacity .2s ease}
.faq details[open] .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq-body{padding:0 22px 20px;font-size:15px;line-height:1.8;color:var(--ink-700)}

/* ---------- 结尾 CTA ---------- */
.cta-band{position:relative;overflow:hidden;background:var(--bg-dark);padding:76px 0}
.cta-band::before{
  content:"";position:absolute;left:-150px;bottom:-210px;width:380px;height:380px;
  border-radius:50%;border:1px solid rgba(255,255,255,.06);
}
.cta-band::after{
  content:"";position:absolute;right:-170px;top:-230px;width:540px;height:540px;
  border-radius:50%;border:1px solid rgba(255,255,255,.06);
}
.cta-inner{position:relative;z-index:1;max-width:820px;margin:0 auto;text-align:center}
.cta-band h2{color:#fff;margin-bottom:14px}
.cta-band p{font-size:16px;line-height:1.8;color:#C7D5EA}
.cta-actions{display:flex;justify-content:center;gap:14px;margin-top:30px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-dark);color:#C7D5EA;padding:64px 0 28px;border-top:1px solid rgba(255,255,255,.10)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand{color:#fff;font-size:17px;font-weight:700;margin-bottom:12px}
.footer-desc{font-size:14px;line-height:1.8;color:#C7D5EA}
.site-footer h4{color:#fff;font-size:14px;font-weight:600;margin-bottom:16px;letter-spacing:.4px}
.site-footer ul{display:flex;flex-direction:column;gap:10px}
.site-footer li{font-size:14px;line-height:1.7;color:#C7D5EA}
.site-footer a{color:#C7D5EA}
.site-footer a:hover{color:#fff;text-decoration:underline;text-underline-offset:2px}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.14);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:#8FA3C0;
}

/* ---------- 响应式 ---------- */
@media (min-width:1440px){
  :root{--sidebar-w:272px}
}
@media (min-width:1024px) and (max-width:1279px){
  :root{--sidebar-w:200px}
  .brand-sub{font-size:11.5px;letter-spacing:0}
  .nav-item{font-size:14px;gap:8px}
  .nav-item svg{width:18px;height:18px}
}
@media (max-width:1279px){
  .container{padding:0 32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
}
@media (max-width:1023px){
  .sidenav{display:none}
  .mobilebar{display:flex}
  .page{margin-left:0;padding-top:60px}
  .section{padding:64px 0}
  .steps{grid-template-columns:repeat(2,1fr);gap:30px 24px}
  .step::after{display:none}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .grid-2{grid-template-columns:1fr}
  .intro-cols{grid-template-columns:1fr;gap:18px}
  .steps{grid-template-columns:1fr;gap:22px}
  .cat-hero{padding:48px 0 52px;min-height:260px}
  .cat-hero-sub{font-size:16px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .cta-band{padding:60px 0}
  .cta-actions .btn{width:100%}
  .faq summary{font-size:16px}
}
@media (max-width:480px){
  .btn{width:100%}
  .cta-actions{gap:12px}
  .card-body{padding:18px 18px 20px}
  .faq summary{padding:14px 16px 14px 18px}
  .faq-body{padding:0 18px 18px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}
  html{scroll-behavior:auto}
}