/* roulang page: index */
/* ============ 设计变量 ============ */
:root{
  --c-brand-700:#14507F;
  --c-brand-600:#1F6FB2;
  --c-brand-500:#3E8FCF;
  --c-brand-100:#E4EFFA;
  --c-ink-900:#12263A;
  --c-ink-700:#3A5266;
  --c-ink-500:#6B8098;
  --c-ink-300:#9DAEC0;
  --c-line:#E2EBF4;
  --c-bg:#F5F8FC;
  --c-surface:#FFFFFF;
  --c-accent-500:#F2A03D;
  --c-accent-600:#DE8A22;
  --c-mint-500:#2FB3A0;
  --c-footer:#0E3B63;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --r-input:10px;
  --sh-card:0 2px 4px rgba(18,38,58,.04),0 12px 28px rgba(18,38,58,.06);
  --sh-hover:0 18px 36px rgba(18,38,58,.10);
  --sp-section:96px;
  --tr:.25s cubic-bezier(.2,.7,.3,1);
  --font-stack:'PingFang SC','Microsoft YaHei','Hiragino Sans GB','Noto Sans SC',system-ui,sans-serif;
}
/* ============ reset / base ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;padding:0;font-family:var(--font-stack);font-size:16px;line-height:1.75;
  color:var(--c-ink-700);background:var(--c-bg);overflow-x:hidden;
  font-variant-numeric:tabular-nums;-webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5{margin:0;color:var(--c-ink-900);font-weight:700;line-height:1.35;letter-spacing:.2px;}
h1{font-size:44px;}
h2{font-size:32px;}
h3{font-size:20px;}
h4{font-size:17px;font-weight:600;}
p{margin:0;}
img{max-width:100%;display:block;}
a{color:var(--c-brand-600);text-decoration:none;transition:color var(--tr),opacity var(--tr);}
a:hover{color:var(--c-brand-700);}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:var(--font-stack);}
strong,b{font-weight:700;}
:focus-visible{outline:2px solid var(--c-brand-600);outline-offset:2px;border-radius:4px;}
::selection{background:var(--c-brand-100);color:var(--c-brand-700);}

/* ============ 容器与栅格 ============ */
.container{max-width:1200px;padding-left:24px;padding-right:24px;margin:0 auto;width:100%;}
.section{padding:var(--sp-section) 0;}
.section-alt{background:var(--c-surface);}
.section-soft{background:linear-gradient(180deg,#FFFFFF 0%,var(--c-bg) 100%);}
.section-head{max-width:820px;margin-bottom:32px;}
.section-head h2{margin-bottom:12px;}
.section-head p{font-size:16px;color:var(--c-ink-500);line-height:1.8;}
.section-head.with-link{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none;}
.section-head.with-link > div{max-width:760px;}

/* ============ 顶部通知条 ============ */
.topbar{background:var(--c-brand-100);color:var(--c-brand-700);font-size:14px;line-height:1.6;}
.topbar-inner{display:flex;align-items:center;gap:10px;min-height:40px;padding-top:6px;padding-bottom:6px;}
.topbar-dot{width:8px;height:8px;border-radius:50%;background:var(--c-accent-500);flex:0 0 auto;box-shadow:0 0 0 4px rgba(242,160,61,.18);}
.topbar p{flex:1;margin:0;font-size:14px;}
.topbar-close{background:none;border:0;color:var(--c-brand-700);font-size:20px;line-height:1;cursor:pointer;padding:6px 8px;border-radius:8px;transition:background var(--tr);}
.topbar-close:hover{background:rgba(31,111,178,.12);}

/* ============ Header / 导航 ============ */
.site-header{position:sticky;top:0;z-index:90;background:var(--c-surface);border-bottom:1px solid var(--c-line);transition:box-shadow var(--tr);}
.site-header.is-stuck{box-shadow:var(--sh-card);}
.hd-inner{display:flex;align-items:center;gap:20px;min-height:76px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{width:36px;height:36px;border-radius:10px;background:var(--c-brand-100);color:var(--c-brand-600);display:flex;align-items:center;justify-content:center;flex:0 0 auto;transition:var(--tr);}
.brand:hover .brand-mark{background:var(--c-brand-600);color:#fff;}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-name{font-size:18px;font-weight:700;color:var(--c-ink-900);letter-spacing:.4px;}
.brand-sub{font-size:12px;color:var(--c-ink-500);letter-spacing:1.2px;text-transform:uppercase;}
.main-nav{margin-left:auto;}
.main-nav ul{display:flex;align-items:center;gap:2px;}
.main-nav > ul > li{position:relative;}
.main-nav > ul > li > a{
  display:flex;align-items:center;gap:6px;height:44px;padding:0 14px;font-size:15px;font-weight:500;
  color:var(--c-ink-700);border-radius:8px;position:relative;white-space:nowrap;transition:var(--tr);
}
.main-nav > ul > li > a:hover{color:var(--c-brand-600);background:var(--c-brand-100);}
.main-nav > ul > li > a.active{color:var(--c-brand-700);font-weight:600;}
.main-nav > ul > li > a.active::after{content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;background:var(--c-brand-600);}
.nav-caret{font-size:11px;color:var(--c-ink-300);transition:transform var(--tr);}
.has-mega:hover .nav-caret,.has-mega:focus-within .nav-caret{transform:rotate(180deg);color:var(--c-brand-600);}
.hd-actions{display:flex;align-items:center;gap:12px;margin-left:8px;}

/* Mega 面板 */
.mega{
  position:absolute;top:calc(100% + 12px);left:0;width:800px;max-width:calc(100vw - 48px);
  background:var(--c-surface);border-top:3px solid var(--c-brand-600);border-radius:12px;
  box-shadow:var(--sh-hover);padding:28px;display:grid;grid-template-columns:1fr 1fr;gap:28px;
  opacity:0;visibility:hidden;transform:translateY(-8px);transition:var(--tr);z-index:80;
}
.has-mega:hover .mega,.has-mega:focus-within .mega{opacity:1;visibility:visible;transform:translateY(0);}
.mega-col h4{font-size:14px;font-weight:600;color:var(--c-ink-500);letter-spacing:.6px;margin-bottom:14px;}
.mega-list li + li{margin-top:4px;}
.mega-list a{display:flex;flex-direction:column;justify-content:center;min-height:44px;padding:8px 12px;border-radius:10px;transition:var(--tr);}
.mega-list a:hover{background:var(--c-brand-100);}
.mega-list .m-t{font-size:15px;font-weight:600;color:var(--c-ink-900);display:flex;align-items:center;gap:6px;}
.mega-list a:hover .m-t{color:var(--c-brand-600);}
.mega-list .m-t i{font-size:11px;color:var(--c-brand-500);transition:transform var(--tr);}
.mega-list a:hover .m-t i{transform:translateX(3px);}
.mega-list .m-d{font-size:13px;color:var(--c-ink-500);line-height:1.6;}
.mega-cards{display:grid;gap:12px;}
.mega-card{display:block;background:var(--c-brand-100);border-radius:12px;padding:16px 18px;transition:var(--tr);}
.mega-card:hover{background:#D8E8F8;transform:translateY(-2px);}
.mega-card .mc-t{display:flex;align-items:center;justify-content:space-between;font-size:15px;font-weight:600;color:var(--c-brand-700);}
.mega-card .mc-t i{transition:transform var(--tr);}
.mega-card:hover .mc-t i{transform:translateX(3px);}
.mega-card .mc-d{font-size:13px;color:var(--c-ink-700);margin-top:4px;line-height:1.6;}

/* 移动端导航 */
.hamburger{width:44px;height:44px;border:1px solid var(--c-line);background:var(--c-surface);border-radius:10px;display:none;flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer;transition:var(--tr);}
.hamburger:hover{border-color:var(--c-brand-500);background:var(--c-brand-100);}
.hamburger span{display:block;width:20px;height:2px;background:var(--c-ink-900);border-radius:2px;transition:var(--tr);}
.mobile-nav{border-top:1px solid var(--c-line);padding:12px 0 20px;max-height:calc(100vh - 76px);overflow-y:auto;}
.mobile-nav ul li + li{margin-top:4px;}
.mobile-nav ul a{display:block;padding:12px 14px;min-height:44px;border-radius:10px;font-size:15px;font-weight:500;color:var(--c-ink-700);}
.mobile-nav ul a:hover,.mobile-nav ul a.active{background:var(--c-brand-100);color:var(--c-brand-700);}
.mobile-nav .btn-brand{margin-top:14px;width:100%;justify-content:center;}

/* ============ 按钮 ============ */
.btn-brand,.btn-ghost,.btn-accent,.btn-soft{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;
  border-radius:var(--r-btn);font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:var(--tr);white-space:nowrap;text-align:center;
}
.btn-brand{background:var(--c-brand-600);color:#fff;box-shadow:0 6px 16px rgba(31,111,178,.22);}
.btn-brand:hover{background:var(--c-brand-700);color:#fff;transform:translateY(-1px);box-shadow:0 12px 24px rgba(31,111,178,.26);}
.btn-brand:active{transform:translateY(0);box-shadow:0 4px 10px rgba(31,111,178,.2);}
.btn-accent{background:var(--c-accent-500);color:#fff;box-shadow:0 6px 16px rgba(242,160,61,.26);}
.btn-accent:hover{background:var(--c-accent-600);color:#fff;transform:translateY(-1px);box-shadow:0 12px 24px rgba(222,138,34,.3);}
.btn-ghost{background:transparent;color:var(--c-brand-600);border-color:var(--c-brand-600);}
.btn-ghost:hover{background:rgba(31,111,178,.08);color:var(--c-brand-700);border-color:var(--c-brand-700);}
.btn-soft{background:var(--c-brand-100);color:var(--c-brand-700);border-color:var(--c-brand-100);}
.btn-soft:hover{background:#D8E8F8;color:var(--c-brand-700);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}

/* ============ 标签 / 徽章 ============ */
.badge{display:inline-flex;align-items:center;gap:6px;border-radius:var(--r-pill);padding:6px 12px;font-size:14px;font-weight:600;line-height:1.2;}
.badge-brand{background:rgba(31,111,178,.10);color:var(--c-brand-700);}
.badge-mint{background:rgba(47,179,160,.12);color:#1F8C7D;}
.badge-accent{background:rgba(242,160,61,.14);color:#B47114;}
.badge-gray{background:rgba(107,128,152,.12);color:var(--c-ink-500);}
.tag{display:inline-block;font-size:13px;color:var(--c-ink-500);background:var(--c-bg);border:1px solid var(--c-line);border-radius:var(--r-pill);padding:4px 12px;}

/* ============ Hero ============ */
.hero{position:relative;background:var(--c-bg);padding:72px 0 88px;overflow:hidden;}
.hero::before{content:"";position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;opacity:.07;pointer-events:none;}
.hero::after{content:"";position:absolute;right:-160px;top:-120px;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,rgba(31,111,178,.14) 0%,rgba(31,111,178,0) 68%);pointer-events:none;}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:var(--c-brand-100);color:var(--c-brand-700);border-radius:var(--r-pill);padding:7px 16px;font-size:14px;font-weight:600;margin-bottom:20px;}
.hero h1{font-size:44px;line-height:1.3;margin-bottom:18px;letter-spacing:.2px;}
.hero-sub{font-size:17px;color:var(--c-ink-700);max-width:560px;margin-bottom:28px;line-height:1.75;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:20px;}
.hero-note{font-size:14px;color:var(--c-ink-500);display:flex;align-items:center;gap:8px;}
.hero-note i{color:var(--c-mint-500);}
.hero-media{position:relative;}
.hero-media img{width:100%;height:420px;object-fit:cover;border-radius:var(--r-img);box-shadow:var(--sh-card);border:1px solid var(--c-line);}
.hero-float{position:absolute;left:-18px;bottom:-22px;background:var(--c-surface);border:1px solid var(--c-line);border-radius:12px;box-shadow:var(--sh-hover);padding:16px 20px;display:flex;align-items:center;gap:14px;max-width:290px;}
.hero-float strong{font-size:34px;color:var(--c-brand-600);line-height:1;font-weight:700;}
.hero-float span{font-size:13px;color:var(--c-ink-500);line-height:1.55;}

/* ============ 指标看板 ============ */
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.metric-card{position:relative;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-card);padding:26px 24px 22px;overflow:hidden;transition:var(--tr);}
.metric-card:hover{box-shadow:var(--sh-hover);transform:translateY(-3px);}
.metric-bar{position:absolute;top:0;left:0;width:56px;height:3px;background:var(--c-brand-600);border-radius:0 0 3px 0;}
.metric-num{font-size:46px;font-weight:700;color:var(--c-ink-900);line-height:1.1;display:flex;align-items:baseline;gap:4px;margin-bottom:8px;}
.metric-num span{font-size:16px;font-weight:600;color:var(--c-ink-500);}
.metric-label{font-size:15px;color:var(--c-ink-700);font-weight:600;margin-bottom:14px;}
.metric-card .badge{font-size:13px;}

/* ============ Bento 服务矩阵 ============ */
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:26px;}
.card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-card);overflow:hidden;transition:var(--tr);display:flex;flex-direction:column;}
.card:hover{box-shadow:var(--sh-hover);transform:translateY(-3px);}
.bento-lg{grid-column:span 8;}
.bento-sm{grid-column:span 4;}
.card-media{position:relative;overflow:hidden;height:100%;min-height:220px;}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s cubic-bezier(.2,.7,.3,1);}
.card:hover .card-media img{transform:scale(1.03);}
.bento-lg{flex-direction:row;}
.bento-lg .card-body{flex:1;padding:32px;}
.bento-lg .card-media{flex:0 0 44%;}
.card-body{padding:26px 24px;display:flex;flex-direction:column;gap:12px;}
.card-body h3{font-size:20px;}
.card-body p{font-size:15px;color:var(--c-ink-500);line-height:1.75;}
.card-num{font-size:13px;font-weight:700;color:var(--c-brand-600);letter-spacing:1.4px;}
.arrow-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-brand-600);margin-top:auto;}
.arrow-link i{font-size:12px;transition:transform var(--tr);}
.arrow-link:hover{color:var(--c-brand-700);}
.arrow-link:hover i{transform:translateX(4px);}
.card-icon{width:44px;height:44px;border-radius:12px;background:var(--c-brand-100);color:var(--c-brand-600);display:flex;align-items:center;justify-content:center;font-size:18px;}

/* ============ 对比区 ============ */
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px;}
.compare-panel{border-radius:var(--r-card);padding:28px;border:1px solid var(--c-line);}
.compare-panel.is-before{background:var(--c-bg);}
.compare-panel.is-after{background:var(--c-brand-100);border-color:#CFE3F7;}
.compare-panel h3{font-size:20px;margin-bottom:20px;display:flex;align-items:center;gap:10px;}
.compare-panel.is-before h3{color:var(--c-ink-700);}
.compare-panel.is-before h3 i{color:var(--c-ink-300);}
.compare-panel.is-after h3{color:var(--c-brand-700);}
.compare-panel.is-after h3 i{color:var(--c-brand-600);}
.compare-panel li + li{margin-top:20px;}
.cmp-head{display:flex;justify-content:space-between;align-items:baseline;font-size:15px;font-weight:600;margin-bottom:8px;}
.is-before .cmp-head{color:var(--c-ink-700);}
.is-after .cmp-head{color:var(--c-brand-700);}
.cmp-head em{font-style:normal;font-size:13px;font-weight:600;}
.is-before .cmp-head em{color:var(--c-ink-500);}
.is-after .cmp-head em{color:var(--c-brand-600);}
.cmp-bar{height:10px;border-radius:var(--r-pill);background:rgba(107,128,152,.16);overflow:hidden;}
.is-after .cmp-bar{background:rgba(255,255,255,.72);}
.cmp-bar i{display:block;height:100%;border-radius:var(--r-pill);}
.is-before .cmp-bar i{background:var(--c-ink-300);}
.is-after .cmp-bar i{background:var(--c-brand-600);}
.cmp-note{font-size:13px;line-height:1.7;margin-top:8px;}
.is-before .cmp-note{color:var(--c-ink-500);}
.is-after .cmp-note{color:var(--c-brand-700);opacity:.9;}

/* ============ 资讯卡片 ============ */
.text-link{font-size:14px;font-weight:600;color:var(--c-brand-600);display:inline-flex;align-items:center;gap:6px;white-space:nowrap;}
.text-link:hover{color:var(--c-brand-700);}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;}
.news-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-card);overflow:hidden;display:flex;flex-direction:column;transition:var(--tr);}
.news-card:hover{box-shadow:var(--sh-hover);transform:translateY(-3px);}
.news-thumb{position:relative;display:block;aspect-ratio:16/9;overflow:hidden;background:var(--c-brand-100);}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s cubic-bezier(.2,.7,.3,1);}
.news-card:hover .news-thumb img{transform:scale(1.03);}
.news-cat{position:absolute;left:12px;top:12px;background:rgba(228,239,250,.95);color:var(--c-brand-700);font-size:13px;font-weight:600;border-radius:var(--r-pill);padding:5px 12px;backdrop-filter:blur(2px);}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.news-body h3{font-size:17px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-body h3 a{color:var(--c-ink-900);}
.news-body h3 a:hover{color:var(--c-brand-600);}
.news-body p{font-size:14px;color:var(--c-ink-500);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:12px;border-top:1px solid var(--c-line);font-size:13px;color:var(--c-ink-500);}
.news-more{color:var(--c-brand-600);font-weight:600;}
.empty-state{background:var(--c-surface);border:1px dashed var(--c-line);border-radius:var(--r-card);padding:56px 24px;text-align:center;box-shadow:var(--sh-card);}
.empty-state i{font-size:30px;color:var(--c-ink-300);margin-bottom:14px;display:block;}
.empty-state p{font-size:15px;color:var(--c-ink-500);margin-bottom:18px;}

/* ============ FAQ ============ */
.faq-wrap{display:flex;flex-direction:column;gap:12px;}
.faq-wrap .accordion-item{background:var(--c-surface);border:1px solid var(--c-line);border-radius:12px;overflow:hidden;box-shadow:var(--sh-card);}
.faq-wrap .accordion-header{margin:0;}
.faq-wrap .accordion-button{
  width:100%;min-height:56px;padding:16px 56px 16px 22px;font-size:17px;font-weight:600;color:var(--c-ink-900);
  background:var(--c-surface);border:0;box-shadow:none;position:relative;text-align:left;line-height:1.5;transition:var(--tr);
}
.faq-wrap .accordion-button:not(.collapsed){color:var(--c-brand-600);background:var(--c-surface);box-shadow:none;}
.faq-wrap .accordion-button:focus{box-shadow:none;outline:2px solid var(--c-brand-600);outline-offset:-2px;}
.faq-wrap .accordion-button:hover{background:var(--c-bg);}
.faq-wrap .accordion-button::after{display:none;}
.faq-wrap .accordion-button::before{
  content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);
  width:28px;height:28px;border-radius:50%;background:var(--c-brand-100);color:var(--c-brand-700);
  display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:600;line-height:1;
  transition:transform var(--tr),background var(--tr);
}
.faq-wrap .accordion-button:not(.collapsed)::before{transform:translateY(-50%) rotate(45deg);background:var(--c-brand-600);color:#fff;}
.faq-wrap .accordion-body{padding:0 22px 22px;font-size:16px;line-height:1.85;color:var(--c-ink-700);}
.faq-wrap .accordion-body p + p{margin-top:10px;}

/* ============ CTA / 表单 ============ */
.cta-section{background:var(--c-surface);padding:var(--sp-section) 0;}
.cta-grid{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:start;}
.cta-copy h2{margin-bottom:14px;}
.cta-copy > p{font-size:16px;color:var(--c-ink-500);line-height:1.8;margin-bottom:24px;max-width:440px;}
.cta-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--c-ink-700);line-height:1.7;}
.cta-list li + li{margin-top:12px;}
.cta-list i{color:var(--c-brand-600);font-size:14px;margin-top:5px;flex:0 0 auto;}
.cta-form{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-card);padding:32px;}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.field{margin-bottom:18px;}
.field label{display:block;font-size:14px;font-weight:500;color:var(--c-ink-700);margin-bottom:8px;}
.field label .req{color:var(--c-accent-600);margin-left:2px;}
.form-control,.form-select{
  width:100%;height:48px;border:1px solid var(--c-line);border-radius:var(--r-input);padding:0 14px;
  font-size:15px;color:var(--c-ink-900);background:var(--c-surface);transition:var(--tr);font-family:var(--font-stack);
}
textarea.form-control{height:auto;min-height:120px;padding:12px 14px;line-height:1.7;resize:vertical;}
.form-control::placeholder{color:var(--c-ink-300);}
.form-control:hover,.form-select:hover{border-color:#CFE0F0;}
.form-control:focus,.form-select:focus{border-color:var(--c-brand-600);outline:0;box-shadow:0 0 0 3px var(--c-brand-100);}
.form-control:disabled,.form-select:disabled{background:var(--c-bg);color:var(--c-ink-300);cursor:not-allowed;}
.form-hint{font-size:13px;color:var(--c-ink-500);margin-top:12px;line-height:1.6;}
.form-tip{font-size:14px;color:var(--c-mint-500);font-weight:600;margin-top:12px;min-height:20px;}
.form-tip.is-error{color:#C0552B;}

/* ============ Footer ============ */
.site-footer{background:var(--c-footer);color:rgba(255,255,255,.72);padding:64px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding-bottom:44px;}
.footer-brand .brand-name{color:#fff;}
.footer-brand .brand-mark{background:rgba(255,255,255,.12);color:#fff;}
.footer-brand .brand-sub{color:rgba(255,255,255,.55);}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);margin-top:16px;max-width:300px;}
.footer-contact{font-size:14px;color:rgba(255,255,255,.72);margin-top:14px;line-height:1.9;}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;letter-spacing:.4px;}
.footer-col li + li{margin-top:10px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72);display:inline-block;transition:var(--tr);}
.footer-col a:hover{color:#fff;padding-left:2px;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.16);padding:20px 0;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.6);}
.footer-bottom a{color:rgba(255,255,255,.72);}
.footer-bottom a:hover{color:#fff;}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  :root{--sp-section:72px;}
  h1{font-size:36px;}
  h2{font-size:28px;}
  .hero h1{font-size:36px;}
  .metric-grid{grid-template-columns:repeat(2,1fr);}
  .bento-lg{grid-column:span 12;flex-direction:row;}
  .bento-lg .card-media{flex:0 0 42%;}
  .bento-sm{grid-column:span 6;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-grid{grid-template-columns:1fr;gap:32px;}
  .hero-media img{height:360px;}
}
@media (max-width:991px){
  .main-nav,.hd-actions{display:none;}
  .hamburger{display:flex;margin-left:auto;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-media img{height:320px;}
  .hero-float{left:12px;bottom:-18px;}
  .compare-grid{grid-template-columns:1fr;gap:20px;}
  .bento-lg{flex-direction:column;}
  .bento-lg .card-media{flex:none;min-height:200px;}
  .card-media img{height:220px;}
}
@media (max-width:767px){
  :root{--sp-section:56px;}
  .container{padding-left:16px;padding-right:16px;}
  h1{font-size:30px;}
  h2{font-size:24px;}
  h3{font-size:18px;}
  .hero{padding:48px 0 64px;}
  .hero h1{font-size:30px;}
  .hero-sub{font-size:16px;}
  .hero-actions .btn-brand,.hero-actions .btn-ghost{width:100%;}
  .hero-media img{height:240px;}
  .hero-float{position:static;margin-top:14px;max-width:none;}
  .metric-grid{grid-template-columns:1fr;}
  .metric-num{font-size:40px;}
  .bento{grid-template-columns:1fr;gap:20px;}
  .bento-lg,.bento-sm{grid-column:span 1;}
  .news-grid{grid-template-columns:1fr;}
  .section-head.with-link{flex-direction:column;align-items:flex-start;}
  .form-row{grid-template-columns:1fr;}
  .cta-form{padding:24px 20px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .topbar p{font-size:13px;}
  .compare-panel{padding:22px 18px;}
  .faq-wrap .accordion-button{font-size:16px;padding:14px 52px 14px 18px;}
}
@media (max-width:420px){
  .brand-name{font-size:16px;}
  .brand-sub{display:none;}
  .hero h1{font-size:26px;}
}

/* roulang page: article */
:root{
  --c-brand-700:#14507F;
  --c-brand-600:#1F6FB2;
  --c-brand-500:#3E8FCF;
  --c-brand-100:#E4EFFA;
  --c-ink-900:#12263A;
  --c-ink-700:#3A5266;
  --c-ink-500:#6B8098;
  --c-ink-300:#9DAEC0;
  --c-line:#E2EBF4;
  --c-bg:#F5F8FC;
  --c-surface:#FFFFFF;
  --c-accent-500:#F2A03D;
  --c-accent-600:#DE8A22;
  --c-mint-500:#2FB3A0;
  --c-footer:#0E3B63;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --r-input:10px;
  --sh-card:0 2px 4px rgba(18,38,58,.04),0 12px 28px rgba(18,38,58,.06);
  --sh-hover:0 18px 36px rgba(18,38,58,.10);
  --sp-section:96px;
  --tr:.25s cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:'PingFang SC','Microsoft YaHei','Hiragino Sans GB','Noto Sans SC',system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--c-ink-700);
  background:var(--c-bg);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img);}
a{color:var(--c-brand-600);text-decoration:none;transition:color var(--tr);}
a:hover{color:var(--c-brand-500);}
h1,h2,h3,h4,h5{margin:0;color:var(--c-ink-900);font-weight:700;line-height:1.35;}
p{margin:0 0 18px;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--c-brand-600);outline-offset:2px;}
.container{
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
  width:100%;
}
@media (min-width:1400px){
  .container{max-width:1320px;}
}
.section{padding:var(--sp-section) 0;}
.section-head{margin-bottom:32px;max-width:820px;}
.section-head h2{font-size:32px;margin-bottom:12px;}
.section-head p{color:var(--c-ink-500);font-size:16px;margin:0;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:500;color:var(--c-brand-700);
  background:var(--c-brand-100);border-radius:var(--r-pill);
  padding:6px 14px;margin-bottom:16px;
}
.eyebrow i{font-size:12px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;border-radius:var(--r-btn);
  padding:0 24px;height:48px;border:1px solid transparent;
  cursor:pointer;transition:all var(--tr);text-align:center;
  font-family:inherit;line-height:1;
}
.btn i{font-size:14px;}
.btn.btn-brand{background:var(--c-brand-600);color:#fff;box-shadow:0 6px 16px rgba(31,111,178,.20);}
.btn.btn-brand:hover{background:var(--c-brand-700);color:#fff;transform:translateY(-1px);box-shadow:0 12px 26px rgba(20,80,127,.24);}
.btn.btn-brand:active{transform:translateY(0);box-shadow:0 4px 10px rgba(20,80,127,.20);}
.btn.btn-ghost{background:transparent;color:var(--c-brand-600);border-color:var(--c-brand-500);}
.btn.btn-ghost:hover{background:rgba(31,111,178,.08);color:var(--c-brand-700);border-color:var(--c-brand-600);}
.btn.btn-cta{background:var(--c-accent-500);color:#fff;box-shadow:0 6px 16px rgba(242,160,61,.24);}
.btn.btn-cta:hover{background:var(--c-accent-600);color:#fff;transform:translateY(-1px);box-shadow:0 12px 26px rgba(222,138,34,.28);}
.btn.btn-sm{height:42px;padding:0 18px;font-size:14px;}
.btn.btn-block{width:100%;}
.btn[disabled],.btn.disabled{opacity:.5;cursor:not-allowed;box-shadow:none;transform:none;}

/* ---------- 徽章与标签 ---------- */
.badge-soft{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:500;line-height:1;
  padding:6px 12px;border-radius:var(--r-pill);
  background:var(--c-brand-100);color:var(--c-brand-700);
}
.badge-soft.mint{background:rgba(47,179,160,.12);color:#1F8474;}
.badge-soft.warn{background:rgba(242,160,61,.14);color:#B76E12;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:900;
  background:#fff;border-bottom:1px solid var(--c-line);
  transition:box-shadow var(--tr);
}
.site-header:hover{box-shadow:var(--sh-card);}
.header-inner{display:flex;align-items:center;gap:24px;height:76px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:36px;height:36px;border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--c-brand-100);color:var(--c-brand-600);flex:0 0 auto;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{font-size:17px;font-weight:700;color:var(--c-ink-900);letter-spacing:.2px;}
.brand-sub{font-size:11px;color:var(--c-ink-500);letter-spacing:.6px;text-transform:uppercase;}
.main-nav{margin-left:auto;}
.main-nav > ul{display:flex;align-items:center;gap:4px;}
.main-nav > ul > li{position:relative;}
.main-nav > ul > li > a{
  position:relative;display:inline-flex;align-items:center;gap:6px;
  height:44px;padding:0 14px;font-size:15px;font-weight:500;
  color:var(--c-ink-700);border-radius:8px;transition:all var(--tr);
}
.main-nav > ul > li > a:hover{color:var(--c-brand-600);background:var(--c-brand-100);}
.main-nav > ul > li > a.active{color:var(--c-brand-700);}
.main-nav > ul > li > a.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;
  height:2px;border-radius:2px;background:var(--c-brand-600);
}
.nav-caret{font-size:10px;transition:transform var(--tr);}
.has-mega:hover .nav-caret{transform:rotate(180deg);}
.mega{
  position:absolute;top:calc(100% + 16px);left:50%;
  width:760px;transform:translateX(-50%) translateY(8px);
  background:#fff;border-top:3px solid var(--c-brand-600);
  border-radius:12px;box-shadow:var(--sh-hover);
  padding:28px;display:grid;grid-template-columns:1.15fr 1fr;gap:26px;
  opacity:0;visibility:hidden;transition:all var(--tr);z-index:80;
}
.has-mega:hover .mega,.has-mega:focus-within .mega{
  opacity:1;visibility:visible;transform:translateX(-50%) translateY(0);
}
.mega-col h4{font-size:14px;font-weight:600;color:var(--c-ink-900);margin-bottom:16px;}
.mega-list li + li{border-top:1px solid var(--c-line);}
.mega-list a{display:block;padding:12px 10px;border-radius:10px;transition:all var(--tr);}
.mega-list a:hover{background:var(--c-bg);}
.mega-list .m-t{
  display:flex;align-items:center;justify-content:space-between;
  font-size:15px;font-weight:600;color:var(--c-ink-900);
}
.mega-list .m-t i{font-size:12px;color:var(--c-brand-500);opacity:0;transform:translateX(-4px);transition:all var(--tr);}
.mega-list a:hover .m-t{color:var(--c-brand-600);}
.mega-list a:hover .m-t i{opacity:1;transform:translateX(2px);}
.mega-list .m-d{display:block;font-size:13px;color:var(--c-ink-500);margin-top:4px;line-height:1.6;}
.mega-cards{display:flex;flex-direction:column;gap:12px;}
.mega-card{
  display:block;background:var(--c-brand-100);border-radius:12px;
  padding:18px;transition:all var(--tr);
}
.mega-card:hover{background:#D7E7F8;transform:translateY(-2px);}
.mega-card .mc-t{display:flex;align-items:center;justify-content:space-between;font-size:15px;font-weight:600;color:var(--c-brand-700);}
.mega-card .mc-t i{font-size:12px;transition:transform var(--tr);}
.mega-card:hover .mc-t i{transform:translateX(3px);}
.mega-card .mc-d{display:block;font-size:13px;color:var(--c-ink-700);margin-top:6px;}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:8px;}
.nav-toggle{
  width:44px;height:44px;border:1px solid var(--c-line);border-radius:var(--r-btn);
  background:#fff;color:var(--c-ink-900);font-size:18px;
  display:inline-flex;align-items:center;justify-content:center;cursor:pointer;
  transition:all var(--tr);
}
.nav-toggle:hover{border-color:var(--c-brand-500);color:var(--c-brand-600);}
.mobile-nav{background:#fff;border-top:1px solid var(--c-line);}
.mobile-nav ul{padding:12px 0;}
.mobile-nav ul li a{
  display:flex;align-items:center;height:48px;padding:0 8px;
  font-size:15px;font-weight:500;color:var(--c-ink-700);border-radius:8px;
}
.mobile-nav ul li a:hover{background:var(--c-brand-100);color:var(--c-brand-600);}
.mobile-nav .btn{margin:4px 0 18px;}

/* ---------- 面包屑 ---------- */
.crumb-wrap{padding:20px 0 0;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-ink-500);}
.crumb li{display:flex;align-items:center;gap:8px;}
.crumb li + li::before{content:"/";color:var(--c-ink-300);}
.crumb a{color:var(--c-ink-500);}
.crumb a:hover{color:var(--c-brand-600);}
.crumb .current span{
  color:var(--c-ink-900);font-weight:500;
  display:inline-block;max-width:520px;overflow:hidden;
  text-overflow:ellipsis;white-space:nowrap;vertical-align:bottom;
}

/* ---------- 文章头部 ---------- */
.article-head{padding:28px 0 0;}
.article-head .badge-soft{margin-bottom:18px;}
.article-head h1{
  font-size:40px;line-height:1.32;letter-spacing:-.2px;
  max-width:900px;margin-bottom:18px;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:14px;color:var(--c-ink-500);
}
.article-meta .dot{color:var(--c-ink-300);}
.article-head .divider{height:1px;background:var(--c-line);margin-top:26px;}

/* ---------- 文章布局 ---------- */
.article-section{padding:36px 0 72px;}
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 240px;
  gap:48px;align-items:start;
}
.article-body{max-width:780px;}
.article-content{font-size:16px;line-height:1.85;color:var(--c-ink-700);}
.article-content p{margin:0 0 18px;}
.article-content > *:first-child{margin-top:0;}
.article-content h2{
  font-size:24px;margin:40px 0 16px;padding-left:12px;
  border-left:4px solid var(--c-brand-600);line-height:1.4;
}
.article-content h3{font-size:19px;margin:28px 0 12px;}
.article-content h4{font-size:17px;margin:22px 0 10px;}
.article-content ul,.article-content ol{margin:0 0 20px;padding-left:22px;}
.article-content ul{list-style:disc;}
.article-content ol{list-style:decimal;}
.article-content li{line-height:1.8;margin-bottom:8px;}
.article-content ul li::marker,.article-content ol li::marker{color:var(--c-brand-500);}
.article-content a{color:var(--c-brand-600);text-decoration:underline;text-underline-offset:3px;}
.article-content a:hover{color:var(--c-brand-500);}
.article-content blockquote{
  margin:24px 0;padding:20px 22px;
  background:var(--c-brand-100);border-left:3px solid var(--c-brand-600);
  border-radius:0 var(--r-card) var(--r-card) 0;color:var(--c-ink-900);
}
.article-content blockquote p:last-child{margin-bottom:0;}
.article-content img{margin:24px auto;border-radius:var(--r-img);}
.article-content figure{margin:24px 0;}
.article-content figcaption{font-size:13px;color:var(--c-ink-500);text-align:center;margin-top:8px;}
.article-content table{
  width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;
  border:1px solid var(--c-line);border-radius:var(--r-img);overflow:hidden;
}
.article-content th{
  background:var(--c-brand-100);color:var(--c-brand-700);
  font-weight:600;text-align:left;padding:12px 16px;font-size:14px;
}
.article-content td{padding:12px 16px;border-top:1px solid var(--c-line);}
.article-content hr{border:0;border-top:1px solid var(--c-line);margin:32px 0;}
.empty-state{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-card);padding:56px 32px;text-align:center;
}
.empty-state i{font-size:32px;color:var(--c-brand-500);margin-bottom:16px;display:block;}
.empty-state h2{font-size:22px;margin-bottom:10px;border:0;padding:0;}
.empty-state p{color:var(--c-ink-500);margin-bottom:22px;}

/* ---------- 标签与操作 ---------- */
.article-foot{margin-top:40px;padding-top:28px;border-top:1px solid var(--c-line);}
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;}
.tag-row .tag-label{font-size:14px;color:var(--c-ink-500);margin-right:2px;}
.tag-pill{
  display:inline-flex;align-items:center;
  font-size:14px;font-weight:500;line-height:1;
  padding:8px 14px;border-radius:var(--r-pill);
  background:var(--c-brand-100);color:var(--c-brand-700);
  transition:all var(--tr);
}
.tag-pill:hover{background:#D7E7F8;color:var(--c-brand-700);transform:translateY(-1px);}
.share-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px;}

/* ---------- 上一篇 / 下一篇 ---------- */
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:32px;}
.post-nav a{
  display:block;background:#fff;border:1px solid var(--c-line);
  border-radius:var(--r-card);padding:22px;box-shadow:var(--sh-card);
  transition:all var(--tr);
}
.post-nav a:hover{box-shadow:var(--sh-hover);transform:translateY(-3px);border-color:#CFE0F1;}
.post-nav .pn-label{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-ink-500);margin-bottom:10px;}
.post-nav .pn-title{
  font-size:16px;font-weight:600;color:var(--c-ink-900);line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-nav a:hover .pn-title{color:var(--c-brand-600);}
.post-nav .pn-next{text-align:right;}
.post-nav .pn-next .pn-label{justify-content:flex-end;}

/* ---------- 侧栏 ---------- */
.article-side{position:sticky;top:100px;display:flex;flex-direction:column;gap:20px;}
.toc-card,.side-cta{
  background:#fff;border:1px solid var(--c-line);
  border-radius:var(--r-card);box-shadow:var(--sh-card);padding:22px;
}
.toc-title{font-size:15px;font-weight:600;margin-bottom:14px;padding-left:10px;border-left:3px solid var(--c-brand-600);line-height:1.4;}
.toc-list li + li{margin-top:2px;}
.toc-list a{
  display:block;font-size:13px;color:var(--c-ink-500);line-height:1.6;
  padding:7px 8px;border-radius:8px;transition:all var(--tr);
}
.toc-list a:hover{background:var(--c-brand-100);color:var(--c-brand-700);padding-left:12px;}
.toc-empty{font-size:13px;color:var(--c-ink-300);padding:6px 8px;line-height:1.6;}
.side-cta{background:var(--c-brand-100);border-color:#D3E4F6;}
.side-cta h3{font-size:16px;margin-bottom:10px;color:var(--c-brand-700);}
.side-cta p{font-size:13px;color:var(--c-ink-700);line-height:1.7;margin-bottom:16px;}

/* ---------- 相关推荐 ---------- */
.related{background:#fff;border-top:1px solid var(--c-line);}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:26px;}
.news-card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-card);overflow:hidden;transition:all var(--tr);
  display:flex;flex-direction:column;
}
.news-card:hover{box-shadow:var(--sh-hover);transform:translateY(-3px);border-color:#CFE0F1;}
.news-thumb{position:relative;display:block;aspect-ratio:16/9;overflow:hidden;background:var(--c-brand-100);}
.news-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform var(--tr);}
.news-card:hover .news-thumb img{transform:scale(1.03);}
.news-cat{
  position:absolute;top:12px;left:12px;font-size:12px;font-weight:500;
  padding:5px 11px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.92);color:var(--c-brand-700);
}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1;}
.news-body h3{
  font-size:17px;line-height:1.55;margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card:hover .news-body h3{color:var(--c-brand-600);}
.news-body p{
  font-size:14px;color:var(--c-ink-500);line-height:1.7;margin-bottom:16px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--c-ink-500);padding-top:14px;border-top:1px solid var(--c-line);
}
.news-meta i{font-size:12px;color:var(--c-brand-500);transition:transform var(--tr);}
.news-card:hover .news-meta i{transform:translateX(3px);}

/* ---------- CTA 条 ---------- */
.cta-band-wrap{padding:0 0 var(--sp-section);}
.cta-band{
  background:var(--c-brand-100);border:1px solid #D3E4F6;border-radius:18px;
  padding:40px 44px;display:flex;align-items:center;justify-content:space-between;
  gap:32px;flex-wrap:wrap;
}
.cta-band h2{font-size:26px;margin-bottom:10px;}
.cta-band p{color:var(--c-ink-700);font-size:15px;margin:0;max-width:620px;}
.cta-band .cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-footer);color:rgba(255,255,255,.72);padding:64px 0 0;margin-top:0;}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:40px;padding-bottom:44px;
}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand .brand-mark{background:rgba(255,255,255,.12);color:#fff;}
.footer-brand .brand-name{color:#fff;}
.footer-brand .brand-sub{color:rgba(255,255,255,.55);}
.footer-desc{font-size:14px;line-height:1.8;margin-bottom:14px;color:rgba(255,255,255,.72);}
.footer-contact{font-size:13px;line-height:1.8;color:rgba(255,255,255,.55);margin:0;}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-col ul li + li{margin-top:10px;}
.footer-col a{
  font-size:14px;color:rgba(255,255,255,.72);
  display:inline-block;transition:all var(--tr);
}
.footer-col a:hover{color:#fff;padding-left:2px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.14);
  padding:20px 0;display:flex;align-items:center;justify-content:space-between;
  gap:12px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.55);
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0;}
  .article-side{display:none;}
  .article-body{max-width:780px;margin:0 auto;}
  .article-head h1{font-size:34px;}
}
@media (max-width:991px){
  :root{--sp-section:72px;}
  .section-head h2{font-size:26px;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .brand-sub{display:none;}
}
@media (max-width:767px){
  :root{--sp-section:56px;}
  .container{padding-left:16px;padding-right:16px;}
  .article-head h1{font-size:28px;}
  .article-content h2{font-size:21px;margin-top:32px;}
  .article-content table{display:block;overflow-x:auto;white-space:nowrap;}
  .post-nav{grid-template-columns:1fr;}
  .post-nav .pn-next{text-align:left;}
  .post-nav .pn-next .pn-label{justify-content:flex-start;}
  .cta-band{padding:28px 22px;}
  .cta-band h2{font-size:22px;}
  .cta-band .cta-actions{width:100%;}
  .cta-band .cta-actions .btn{flex:1 1 auto;}
}
@media (max-width:575px){
  .card-grid{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:1fr;}
  .crumb .current span{max-width:200px;}
  .brand-name{font-size:16px;}
  .article-head h1{font-size:25px;}
}

/* roulang page: category1 */
:root{
  --c-brand-700:#14507F;
  --c-brand-600:#1F6FB2;
  --c-brand-500:#3E8FCF;
  --c-brand-100:#E4EFFA;
  --c-ink-900:#12263A;
  --c-ink-700:#3A5266;
  --c-ink-500:#6B8098;
  --c-ink-300:#9DAEC0;
  --c-line:#E2EBF4;
  --c-bg:#F5F8FC;
  --c-surface:#FFFFFF;
  --c-accent-500:#F2A03D;
  --c-accent-600:#DE8A22;
  --c-mint-500:#2FB3A0;
  --c-footer:#0E3B63;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --r-input:10px;
  --sh-card:0 2px 4px rgba(18,38,58,.04),0 12px 28px rgba(18,38,58,.06);
  --sh-hover:0 18px 36px rgba(18,38,58,.10);
  --sp-section:96px;
  --t:.25s cubic-bezier(.2,.7,.3,1);
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:'PingFang SC','Microsoft YaHei','Hiragino Sans GB','Noto Sans SC',system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--c-ink-700);
  background:var(--c-bg);
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;}
a{color:var(--c-brand-600);text-decoration:none;transition:color var(--t),background-color var(--t),border-color var(--t);}
a:hover{color:var(--c-brand-500);}
button,input,select,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4,h5{color:var(--c-ink-900);font-weight:700;line-height:1.35;margin:0;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--c-brand-600);outline-offset:2px;border-radius:4px;}
.container{max-width:1200px;width:100%;margin:0 auto;padding:0 24px;}

/* ============ 顶部通知条 ============ */
.notice-bar{
  background:var(--c-brand-100);
  color:var(--c-brand-700);
  font-size:14px;
  line-height:40px;
  text-align:center;
  padding:0 44px 0 24px;
  position:relative;
}
.notice-bar i{color:var(--c-brand-600);margin-right:8px;}
.notice-bar .notice-close{
  position:absolute;right:14px;top:0;width:28px;height:40px;
  background:transparent;border:0;color:var(--c-brand-700);cursor:pointer;
  display:flex;align-items:center;justify-content:center;border-radius:6px;
}
.notice-bar .notice-close:hover{background:rgba(31,111,178,.12);}

/* ============ Header ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:var(--c-surface);
  border-bottom:1px solid var(--c-line);
  box-shadow:0 1px 0 rgba(18,38,58,.02);
}
.header-inner{
  display:flex;align-items:center;gap:24px;
  height:76px;
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:32px;height:32px;border-radius:9px;
  display:flex;align-items:center;justify-content:center;
  background:var(--c-brand-100);color:var(--c-brand-600);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{font-size:17px;font-weight:700;color:var(--c-ink-900);letter-spacing:.2px;}
.brand-sub{font-size:11px;color:var(--c-ink-500);letter-spacing:.6px;text-transform:uppercase;}

.main-nav{flex:1 1 auto;}
.main-nav > ul{display:flex;align-items:center;gap:6px;}
.main-nav > ul > li{position:relative;}
.main-nav > ul > li > a{
  display:flex;align-items:center;gap:6px;
  padding:0 14px;height:44px;
  font-size:15px;font-weight:500;color:var(--c-ink-700);
  border-radius:8px;
  border-bottom:2px solid transparent;
}
.main-nav > ul > li > a:hover{color:var(--c-brand-600);background:var(--c-brand-100);}
.main-nav > ul > li > a.active{
  color:var(--c-brand-700);
  border-bottom-color:var(--c-brand-600);
  background:transparent;
}
.nav-caret{font-size:11px;transition:transform var(--t);}
.has-mega:hover .nav-caret,.has-mega:focus-within .nav-caret{transform:rotate(180deg);}

/* Mega 面板 */
.mega{
  position:absolute;top:calc(100% + 12px);left:-40px;
  width:760px;max-width:88vw;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-top:3px solid var(--c-brand-600);
  border-radius:12px;
  box-shadow:var(--sh-hover);
  padding:28px;
  display:grid;grid-template-columns:1.05fr 1fr;gap:28px;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity var(--t),transform var(--t),visibility var(--t);
}
.has-mega:hover .mega,.has-mega:focus-within .mega{opacity:1;visibility:visible;transform:translateY(0);}
.mega h4{font-size:14px;color:var(--c-ink-900);margin-bottom:14px;letter-spacing:.4px;}
.mega-list li + li{margin-top:6px;}
.mega-list a{
  display:block;padding:10px 12px;border-radius:10px;min-height:44px;
}
.mega-list a:hover{background:var(--c-brand-100);}
.mega-list .m-t{display:flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--c-ink-900);}
.mega-list a:hover .m-t{color:var(--c-brand-500);}
.mega-list .m-t i{font-size:11px;transition:transform var(--t);}
.mega-list a:hover .m-t i{transform:translateX(3px);}
.mega-list .m-d{display:block;font-size:13px;color:var(--c-ink-500);margin-top:2px;}
.mega-cards{display:grid;gap:12px;}
.mega-card{
  display:block;padding:16px;border-radius:12px;background:var(--c-brand-100);
  border:1px solid transparent;transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.mega-card:hover{transform:translateY(-2px);box-shadow:var(--sh-card);border-color:#cfe2f5;}
.mega-card .mc-t{display:flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--c-brand-700);}
.mega-card .mc-d{display:block;font-size:13px;color:var(--c-ink-500);margin-top:4px;}

.header-cta{flex:0 0 auto;display:flex;align-items:center;gap:10px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  cursor:pointer;transition:transform var(--t),box-shadow var(--t),background-color var(--t),color var(--t),border-color var(--t);
}
.btn-primary{background:var(--c-brand-600);color:#fff;}
.btn-primary:hover{background:var(--c-brand-700);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(20,80,127,.22);}
.btn-outline{background:transparent;border-color:var(--c-brand-600);color:var(--c-brand-600);}
.btn-outline:hover{background:rgba(31,111,178,.08);color:var(--c-brand-700);border-color:var(--c-brand-700);}
.btn-accent{background:var(--c-accent-500);color:#fff;}
.btn-accent:hover{background:var(--c-accent-600);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(222,138,34,.28);}
.btn-sm{height:42px;padding:0 18px;font-size:14px;}
.btn:disabled,.btn[disabled]{background:var(--c-ink-300);border-color:var(--c-ink-300);color:#fff;cursor:not-allowed;transform:none;box-shadow:none;}

.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;
  background:var(--c-brand-100);border:1px solid transparent;color:var(--c-brand-700);
  align-items:center;justify-content:center;font-size:17px;cursor:pointer;
}
.nav-toggle:hover{border-color:var(--c-brand-500);}

/* ============ 二级页 Hero ============ */
.sub-hero{
  position:relative;
  padding:44px 0 40px;
  background:
    linear-gradient(180deg,rgba(245,248,252,.94),rgba(245,248,252,.98)),
    url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  border-bottom:1px solid var(--c-line);
  overflow:hidden;
}
.sub-hero::after{
  content:"";position:absolute;right:-80px;top:-60px;width:360px;height:360px;
  border-radius:50%;background:rgba(31,111,178,.06);
  pointer-events:none;
}
.breadcrumb{--bs-breadcrumb-divider:'/';margin:0 0 18px;font-size:13px;position:relative;z-index:1;}
.breadcrumb-item a{color:var(--c-ink-500);}
.breadcrumb-item a:hover{color:var(--c-brand-600);}
.breadcrumb-item.active{color:var(--c-ink-900);}
.breadcrumb-item + .breadcrumb-item::before{color:var(--c-ink-300);padding:0 8px;}
.sub-hero h1{
  font-size:38px;line-height:1.3;position:relative;z-index:1;
  max-width:820px;
}
.sub-hero h1 .hl{color:var(--c-brand-600);}
.sub-hero .hero-sub{
  margin-top:14px;font-size:16px;color:var(--c-ink-500);
  max-width:720px;position:relative;z-index:1;
}
.anchor-pills{
  margin-top:26px;display:flex;flex-wrap:wrap;gap:10px;position:relative;z-index:1;
}
.anchor-pills a{
  display:inline-flex;align-items:center;
  height:38px;padding:0 18px;border-radius:var(--r-pill);
  font-size:14px;font-weight:500;
  background:var(--c-surface);border:1px solid var(--c-line);color:var(--c-ink-700);
  transition:all var(--t);
}
.anchor-pills a:hover{border-color:var(--c-brand-500);background:var(--c-brand-100);color:var(--c-brand-700);}
.anchor-pills a.is-current{background:var(--c-brand-600);border-color:var(--c-brand-600);color:#fff;}

/* ============ 通用板块 ============ */
.section{padding:var(--sp-section) 0;}
.section-alt{background:var(--c-surface);}
.section-head{max-width:820px;margin-bottom:44px;}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--c-brand-700);
  background:var(--c-brand-100);border-radius:var(--r-pill);
  padding:6px 14px;margin-bottom:16px;
}
.section-head h2{font-size:32px;}
.section-head p{margin-top:14px;font-size:16px;color:var(--c-ink-500);}

/* ============ 图文交替 ============ */
.media-row{
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
  padding:36px 0;
}
.media-row + .media-row{border-top:1px solid var(--c-line);}
.media-row.reverse .media-text{order:2;}
.media-row.reverse .media-pic{order:1;}
.media-figure{
  border-radius:var(--r-img);overflow:hidden;
  box-shadow:var(--sh-card);border:1px solid var(--c-line);
  background:var(--c-surface);
}
.media-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .5s cubic-bezier(.2,.7,.3,1);}
.media-figure:hover img{transform:scale(1.03);}
.media-no{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:1px;
  color:var(--c-brand-600);margin-bottom:10px;
}
.media-text h3{font-size:22px;margin-bottom:12px;}
.media-text p{font-size:16px;color:var(--c-ink-700);line-height:1.85;}
.dot-list{margin-top:16px;}
.dot-list li{
  position:relative;padding-left:24px;margin-bottom:10px;
  font-size:15px;color:var(--c-ink-700);
}
.dot-list li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;
  background:var(--c-brand-500);
}
.dot-list li.is-mint::before{background:var(--c-mint-500);}

/* ============ 要点卡片 ============ */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;}
.card{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);box-shadow:var(--sh-card);
  padding:28px;height:100%;
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:#d4e4f3;}
.card-top-bar{height:3px;width:40px;border-radius:999px;background:var(--c-brand-600);margin-bottom:18px;}
.card h3{font-size:19px;margin-bottom:10px;}
.card p{font-size:14.5px;color:var(--c-ink-500);line-height:1.8;}
.card .card-tag{
  display:inline-block;margin-top:16px;font-size:13px;color:var(--c-brand-700);
  background:var(--c-brand-100);border-radius:var(--r-pill);padding:5px 12px;
}
.card-num{
  font-size:13px;font-weight:700;color:var(--c-brand-600);letter-spacing:1px;margin-bottom:12px;
  display:block;
}

/* ============ 对比区 ============ */
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px;}
.compare-pane{
  border-radius:var(--r-card);padding:28px;border:1px solid var(--c-line);
}
.compare-pane.now{background:var(--c-bg);}
.compare-pane.after{background:var(--c-brand-100);border-color:#cfe2f5;}
.compare-pane h3{font-size:19px;display:flex;align-items:center;gap:10px;margin-bottom:20px;}
.compare-pane.now h3{color:var(--c-ink-500);}
.compare-pane.now h3 i{color:var(--c-ink-300);}
.compare-pane.after h3{color:var(--c-brand-700);}
.compare-item{margin-bottom:20px;}
.compare-item:last-child{margin-bottom:0;}
.compare-item .ci-label{font-size:14.5px;font-weight:600;color:var(--c-ink-900);margin-bottom:8px;}
.compare-pane.now .ci-label{color:var(--c-ink-500);font-weight:500;}
.bar-track{height:10px;border-radius:var(--r-pill);background:rgba(18,38,58,.08);overflow:hidden;}
.bar-fill{height:100%;border-radius:var(--r-pill);background:var(--c-ink-300);}
.compare-pane.after .bar-track{background:rgba(31,111,178,.16);}
.compare-pane.after .bar-fill{background:var(--c-brand-600);}
.compare-item .ci-note{font-size:13px;color:var(--c-ink-500);margin-top:6px;}
.compare-pane.after .ci-note{color:var(--c-brand-700);}

/* ============ 参数小卡 ============ */
.stat-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-bottom:44px;}
.stat-mini{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--sh-card);transition:transform var(--t),box-shadow var(--t);
}
.stat-mini:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);}
.stat-mini .s-num{font-size:30px;font-weight:700;color:var(--c-brand-700);line-height:1.2;}
.stat-mini .s-unit{font-size:14px;color:var(--c-ink-500);margin-left:4px;font-weight:500;}
.stat-mini .s-desc{font-size:13.5px;color:var(--c-ink-500);margin-top:8px;}

/* ============ 入口卡片（导流） ============ */
.entry-card{
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);box-shadow:var(--sh-card);
  padding:26px 28px;transition:transform var(--t),box-shadow var(--t);
}
.entry-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);}
.entry-card h3{font-size:18px;margin-bottom:6px;}
.entry-card p{font-size:14px;color:var(--c-ink-500);margin:0;}
.entry-card .ec-link{font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:8px;white-space:nowrap;}
.entry-card .ec-link i{transition:transform var(--t);}
.entry-card:hover .ec-link i{transform:translateX(4px);}

/* ============ FAQ ============ */
.faq-wrap{max-width:900px;}
.accordion-item{
  border:1px solid var(--c-line) !important;border-radius:12px !important;
  background:var(--c-surface);margin-bottom:12px;overflow:hidden;
}
.accordion-button{
  font-size:17px;font-weight:600;color:var(--c-ink-900);
  padding:18px 22px;min-height:56px;background:var(--c-surface);
  box-shadow:none !important;line-height:1.5;
}
.accordion-button:not(.collapsed){color:var(--c-brand-600);background:var(--c-brand-100);}
.accordion-button::after{
  background-image:none;content:"\2b";font-family:'Font Awesome 6 Free';font-weight:900;
  font-size:14px;color:var(--c-brand-600);display:flex;align-items:center;justify-content:center;
  width:24px;height:24px;transition:transform var(--t);transform:rotate(0);
}
.accordion-button:not(.collapsed)::after{transform:rotate(45deg);}
.accordion-body{
  padding:4px 22px 20px;font-size:16px;line-height:1.85;color:var(--c-ink-700);
}

/* ============ CTA 条 ============ */
.cta-strip{
  background:var(--c-brand-100);
  border:1px solid #cfe2f5;
  border-radius:var(--r-card);
  padding:36px 40px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-strip h2{font-size:26px;margin-bottom:8px;}
.cta-strip p{font-size:15px;color:var(--c-ink-700);margin:0;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ============ Footer ============ */
.site-footer{background:var(--c-footer);color:rgba(255,255,255,.72);padding:64px 0 0;margin-top:var(--sp-section);}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:44px;}
.site-footer .brand-name{color:#fff;}
.site-footer .brand-sub{color:rgba(255,255,255,.55);}
.site-footer .brand-mark{background:rgba(255,255,255,.12);color:#fff;}
.footer-desc{margin-top:18px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.72);max-width:340px;}
.footer-contact{margin-top:14px;font-size:13px;color:rgba(255,255,255,.55);line-height:1.9;}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-col li{margin-bottom:10px;}
.footer-col a{color:rgba(255,255,255,.72);font-size:14px;display:inline-block;transition:color var(--t),padding-left var(--t);}
.footer-col a:hover{color:#fff;padding-left:2px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.14);
  padding:20px 0 28px;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.6);
}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  :root{--sp-section:80px;}
  .grid-4{grid-template-columns:repeat(2,1fr);}
  .stat-strip{grid-template-columns:repeat(2,1fr);}
  .mega{width:660px;}
}
@media (max-width:991.98px){
  :root{--sp-section:72px;}
  .container{padding:0 20px;}
  .nav-toggle{display:flex;}
  .main-nav{
    position:fixed;left:0;right:0;top:76px;bottom:0;
    background:var(--c-surface);
    border-top:1px solid var(--c-line);
    padding:16px 20px 100px;
    overflow-y:auto;
    display:none;
  }
  .main-nav.is-open{display:block;}
  .main-nav > ul{flex-direction:column;align-items:stretch;gap:4px;}
  .main-nav > ul > li > a{
    height:48px;padding:0 12px;border-bottom:0;border-radius:10px;justify-content:space-between;
  }
  .main-nav > ul > li > a.active{background:var(--c-brand-100);border-bottom:0;}
  .mega{
    position:static;width:100%;max-width:none;opacity:1;visibility:visible;transform:none;
    box-shadow:none;border:1px solid var(--c-line);border-top:1px solid var(--c-line);
    padding:18px;grid-template-columns:1fr;gap:18px;margin-top:6px;
  }
  .header-cta .btn{display:none;}
  .sub-hero h1{font-size:30px;}
  .media-row{grid-template-columns:1fr;gap:24px;padding:28px 0;}
  .media-row.reverse .media-text{order:1;}
  .media-row.reverse .media-pic{order:2;}
  .compare-grid{grid-template-columns:1fr;}
  .section-head h2{font-size:26px;}
  .cta-strip{padding:28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:575.98px){
  :root{--sp-section:56px;}
  .container{padding:0 16px;}
  .brand-name{font-size:15px;}
  .brand-sub{font-size:10px;}
  .sub-hero{padding:32px 0 30px;}
  .sub-hero h1{font-size:25px;}
  .sub-hero .hero-sub{font-size:15px;}
  .section-head h2{font-size:23px;}
  .grid-4{grid-template-columns:1fr;}
  .stat-strip{grid-template-columns:1fr;}
  .card{padding:22px;}
  .media-text h3{font-size:19px;}
  .cta-strip{padding:24px 20px;}
  .cta-strip h2{font-size:21px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;text-align:left;}
  .accordion-button{font-size:15.5px;padding:16px 18px;}
  .accordion-body{padding:4px 18px 18px;}
  .entry-card{padding:22px;}
}

/* roulang page: category3 */
:root{
  --c-brand-700:#14507F; --c-brand-600:#1F6FB2; --c-brand-500:#3E8FCF; --c-brand-100:#E4EFFA;
  --c-ink-900:#12263A; --c-ink-700:#3A5266; --c-ink-500:#6B8098; --c-ink-300:#9DAEC0;
  --c-line:#E2EBF4; --c-bg:#F5F8FC; --c-surface:#FFFFFF;
  --c-accent-500:#F2A03D; --c-accent-600:#DE8A22; --c-mint-500:#2FB3A0; --c-footer:#0E3B63;
  --r-card:14px; --r-btn:10px; --r-img:12px; --r-pill:999px; --r-input:10px;
  --sh-card:0 2px 4px rgba(18,38,58,.04), 0 12px 28px rgba(18,38,58,.06);
  --sh-hover:0 18px 36px rgba(18,38,58,.10);
  --sp-section:96px;
  --ease:.25s cubic-bezier(.2,.7,.3,1);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;background:var(--c-bg);color:var(--c-ink-700);
  font-family:'PingFang SC','Microsoft YaHei','Hiragino Sans GB','Noto Sans SC',system-ui,sans-serif;
  font-size:16px;line-height:1.75;font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;transition:color var(--ease),background-color var(--ease),transform var(--ease);}
h1,h2,h3,h4{color:var(--c-ink-900);line-height:1.35;margin:0;font-weight:700;}
p{margin:0 0 16px;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
button,input,select,textarea{font:inherit;color:inherit;}
:focus-visible{outline:2px solid var(--c-brand-600);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1200px;margin-inline:auto;padding-inline:24px;}
.num{font-variant-numeric:tabular-nums;}

/* ---------- 按钮 ---------- */
.btn-brand,.btn-outline-brand,.btn-accent{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;text-align:center;
  transition:background-color var(--ease),color var(--ease),border-color var(--ease),box-shadow var(--ease),transform var(--ease);
}
.btn-brand{background:var(--c-brand-600);color:#fff;}
.btn-brand:hover{background:var(--c-brand-700);color:#fff;box-shadow:0 10px 22px rgba(31,111,178,.24);transform:translateY(-1px);}
.btn-outline-brand{background:transparent;border-color:var(--c-brand-600);color:var(--c-brand-600);}
.btn-outline-brand:hover{background:rgba(31,111,178,.08);color:var(--c-brand-700);border-color:var(--c-brand-700);}
.btn-accent{background:var(--c-accent-500);color:#fff;}
.btn-accent:hover{background:var(--c-accent-600);color:#fff;box-shadow:0 10px 22px rgba(222,138,34,.26);transform:translateY(-1px);}
.btn-sm{height:42px;padding:0 18px;font-size:14px;}
.btn-brand:active,.btn-outline-brand:active,.btn-accent:active{transform:translateY(0);}
.btn-outline-brand:disabled{color:var(--c-ink-300);border-color:var(--c-line);background:#fff;cursor:not-allowed;}

/* ---------- 页头与导航 ---------- */
.site-header{position:sticky;top:0;z-index:1030;background:#fff;border-bottom:1px solid var(--c-line);transition:box-shadow var(--ease);}
.site-header.is-stuck{box-shadow:var(--sh-card);}
.header-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:22px;min-height:76px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{width:32px;height:32px;display:grid;place-items:center;color:var(--c-brand-600);background:var(--c-brand-100);border-radius:10px;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{font-size:17px;font-weight:700;color:var(--c-ink-900);}
.brand-sub{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--c-ink-500);}
.nav-wrap{display:flex;align-items:center;justify-content:flex-end;gap:18px;flex:1;}
.main-nav ul{display:flex;align-items:center;gap:2px;}
.main-nav li{position:relative;}
.main-nav > ul > li > a{
  position:relative;display:inline-flex;align-items:center;gap:6px;
  padding:12px 14px;font-size:15px;font-weight:500;color:var(--c-ink-700);border-radius:8px;
}
.main-nav > ul > li > a:hover{color:var(--c-brand-600);background:var(--c-brand-100);}
.main-nav > ul > li > a.active{color:var(--c-brand-700);font-weight:600;}
.main-nav > ul > li > a.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;background:var(--c-brand-600);
}
.nav-caret{font-size:11px;color:var(--c-ink-300);}
.main-nav > ul > li > a:hover .nav-caret{color:var(--c-brand-500);}
.header-cta{flex:0 0 auto;}
.header-cta .btn-accent{height:44px;padding:0 20px;font-size:14px;}
.nav-toggle{
  display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-btn);color:var(--c-ink-900);font-size:18px;
  transition:border-color var(--ease),color var(--ease);
}
.nav-toggle:hover{border-color:var(--c-brand-500);color:var(--c-brand-600);}

/* Mega 面板 */
.mega{
  position:absolute;top:calc(100% + 12px);left:50%;
  width:min(780px,calc(100vw - 48px));
  transform:translateX(-50%) translateY(10px);
  background:#fff;border-top:3px solid var(--c-brand-600);border-radius:12px;
  box-shadow:var(--sh-hover);padding:28px;display:grid;grid-template-columns:1fr 1fr;gap:28px;
  opacity:0;visibility:hidden;pointer-events:none;z-index:60;
  transition:opacity var(--ease),transform var(--ease),visibility var(--ease);
}
.has-mega:hover .mega,.has-mega:focus-within .mega{opacity:1;visibility:visible;pointer-events:auto;transform:translateX(-50%) translateY(0);}
.mega h4{font-size:14px;font-weight:600;color:var(--c-ink-500);letter-spacing:.04em;margin-bottom:14px;}
.mega-list li + li{margin-top:6px;}
.mega-list a{display:block;padding:10px 12px;border-radius:10px;transition:background-color var(--ease);}
.mega-list a:hover{background:var(--c-brand-100);}
.mega-list .m-t{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--c-ink-900);}
.mega-list a:hover .m-t{color:var(--c-brand-600);}
.mega-list .m-t i{font-size:12px;color:var(--c-brand-500);transition:transform var(--ease);}
.mega-list a:hover .m-t i{transform:translateX(2px);}
.mega-list .m-d{display:block;font-size:13px;color:var(--c-ink-500);margin-top:2px;}
.mega-cards{display:grid;gap:12px;}
.mega-card{display:block;padding:16px 18px;background:var(--c-brand-100);border-radius:12px;transition:transform var(--ease),box-shadow var(--ease);}
.mega-card:hover{transform:translateY(-2px);box-shadow:var(--sh-card);}
.mega-card .mc-t{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--c-brand-700);}
.mega-card .mc-t i{font-size:12px;transition:transform var(--ease);}
.mega-card:hover .mc-t i{transform:translateX(3px);}
.mega-card .mc-d{display:block;font-size:13px;color:var(--c-ink-700);opacity:.85;margin-top:4px;}

/* ---------- 通用板块 ---------- */
.section{padding:var(--sp-section) 0;}
.section-tight{padding:64px 0;}
.section-white{background:var(--c-surface);}
.section-head{max-width:820px;margin-bottom:36px;}
.eyebrow{display:inline-block;font-size:13px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--c-brand-600);margin-bottom:12px;}
.section-head h2{font-size:clamp(24px,2.6vw,32px);margin-bottom:14px;}
.section-head p{font-size:16px;color:var(--c-ink-500);max-width:760px;}
.text-measure{max-width:820px;}
.text-measure p{font-size:16px;line-height:1.85;}

/* ---------- 分类页 Hero ---------- */
.cat-hero{
  position:relative;overflow:hidden;display:flex;align-items:center;
  min-height:270px;padding:52px 0 48px;color:#fff;
  background-image:linear-gradient(115deg,rgba(14,59,99,.94) 8%,rgba(31,111,178,.82) 62%,rgba(62,143,207,.72) 100%),
                   url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
}
.cat-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.07;
  background-image:radial-gradient(circle at 18% 22%,#fff 0 1px,transparent 1px),radial-gradient(circle at 68% 62%,#fff 0 1px,transparent 1px);
  background-size:180px 180px,240px 240px;
}
.cat-hero .container{position:relative;z-index:2;}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.78);}
.crumbs a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}
.crumbs .sep{opacity:.55;}
.crumbs .current{color:#fff;}
.cat-hero h1{color:#fff;font-size:clamp(26px,3.4vw,40px);margin:16px 0 12px;max-width:900px;}
.cat-hero .hero-lead{font-size:17px;color:rgba(255,255,255,.9);max-width:640px;margin-bottom:26px;}
.pill-nav{display:flex;flex-wrap:wrap;gap:10px;}
.pill{
  display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 18px;
  font-size:14px;font-weight:500;color:#fff;border:1px solid rgba(255,255,255,.45);border-radius:var(--r-pill);
  transition:background-color var(--ease),border-color var(--ease),color var(--ease);
}
.pill:hover{background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.8);}
.pill.active{background:var(--c-brand-600);border-color:var(--c-brand-600);color:#fff;font-weight:600;}

/* ---------- 指标小卡 ---------- */
.stat-card{
  position:relative;overflow:hidden;height:100%;background:#fff;border:1px solid var(--c-line);
  border-radius:var(--r-card);padding:24px 24px 22px;box-shadow:var(--sh-card);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.stat-card::before{content:"";position:absolute;left:0;top:0;width:100%;height:3px;background:var(--c-brand-600);}
.stat-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:#D3E3F3;}
.stat-value{display:flex;align-items:baseline;gap:6px;}
.stat-num{font-size:32px;font-weight:700;color:var(--c-ink-900);font-variant-numeric:tabular-nums;line-height:1.1;}
.stat-unit{font-size:14px;color:var(--c-ink-500);}
.stat-card h3{font-size:16px;font-weight:600;margin:12px 0 6px;}
.stat-card p{font-size:14px;color:var(--c-ink-500);line-height:1.7;margin:0;}
.stat-card .tag{margin-top:14px;}

/* ---------- 徽章 / 标签 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:var(--r-pill);
  font-size:13px;font-weight:500;background:rgba(31,111,178,.1);color:var(--c-brand-700);
}
.tag-mint{background:rgba(47,179,160,.12);color:#1F8E7E;}
.tag-accent{background:rgba(242,160,61,.14);color:var(--c-accent-600);}
.tag-neutral{background:rgba(107,128,152,.12);color:var(--c-ink-500);}

/* ---------- 要点卡 ---------- */
.feature-card{
  height:100%;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--sh-card);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.feature-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:#D3E3F3;}
.feature-num{
  display:inline-grid;place-items:center;width:38px;height:38px;border-radius:11px;
  background:var(--c-brand-100);color:var(--c-brand-700);font-size:15px;font-weight:700;
  font-variant-numeric:tabular-nums;margin-bottom:16px;
}
.feature-card h3{font-size:18px;margin-bottom:10px;}
.feature-card p{font-size:14.5px;color:var(--c-ink-500);line-height:1.75;margin:0;}

/* ---------- 对比表 ---------- */
.table-wrap{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-card);overflow:hidden;
}
.table-scroll{overflow-x:auto;}
.cmp-table{width:100%;border-collapse:collapse;font-size:15px;min-width:720px;}
.cmp-table thead th{
  background:var(--c-brand-100);color:var(--c-brand-700);font-size:14px;font-weight:600;
  text-align:left;padding:16px 20px;white-space:nowrap;
}
.cmp-table tbody td{padding:16px 20px;border-top:1px solid var(--c-line);vertical-align:top;color:var(--c-ink-700);line-height:1.7;}
.cmp-table tbody td:first-child{font-weight:600;color:var(--c-ink-900);width:22%;}
.cmp-table tbody tr:hover{background:var(--c-bg);}
.cmp-table .mark{color:var(--c-brand-600);font-weight:600;}

/* ---------- 左右对照 ---------- */
.cmp-panel{height:100%;border-radius:var(--r-card);padding:28px;border:1px solid var(--c-line);}
.cmp-panel.old{background:var(--c-bg);border-color:#DCE7F1;}
.cmp-panel.new{background:var(--c-brand-100);border-color:#C9DEF3;}
.cmp-panel h3{font-size:18px;margin-bottom:6px;display:flex;align-items:center;gap:10px;}
.cmp-panel.old h3{color:var(--c-ink-700);}
.cmp-panel.new h3{color:var(--c-brand-700);}
.cmp-panel .panel-note{font-size:13px;margin-bottom:22px;}
.cmp-panel.old .panel-note{color:var(--c-ink-500);}
.cmp-panel.new .panel-note{color:var(--c-brand-600);}
.cmp-item + .cmp-item{margin-top:20px;}
.cmp-item .ci-top{display:flex;align-items:baseline;justify-content:space-between;gap:12px;font-size:15px;font-weight:600;}
.cmp-panel.old .ci-top{color:var(--c-ink-700);}
.cmp-panel.new .ci-top{color:var(--c-brand-700);}
.cmp-item .ci-val{font-size:14px;font-weight:600;font-variant-numeric:tabular-nums;}
.cmp-bar{height:10px;border-radius:var(--r-pill);margin:10px 0 8px;overflow:hidden;background:#fff;}
.cmp-bar span{display:block;height:100%;border-radius:var(--r-pill);}
.cmp-panel.old .cmp-bar{background:rgba(255,255,255,.8);}
.cmp-bar i{display:block;height:100%;border-radius:var(--r-pill);background:var(--c-ink-300);}
.cmp-panel.new .cmp-bar i{background:var(--c-brand-600);}
.cmp-item .ci-desc{font-size:13px;line-height:1.7;margin:0;}
.cmp-panel.old .ci-desc{color:var(--c-ink-500);}
.cmp-panel.new .ci-desc{color:var(--c-brand-700);opacity:.85;}

/* ---------- 深色图文板块 ---------- */
.dark-band{background:var(--c-brand-700);color:rgba(255,255,255,.86);}
.dark-band h2,.dark-band h3{color:#fff;}
.dark-band .eyebrow{color:var(--c-brand-500);}
.dark-band p{color:rgba(255,255,255,.82);}
.dark-band .dark-list li{
  display:flex;gap:12px;padding:14px 0;border-top:1px solid rgba(255,255,255,.16);
  font-size:15px;color:rgba(255,255,255,.9);
}
.dark-band .dark-list li:last-child{border-bottom:1px solid rgba(255,255,255,.16);}
.dark-band .dark-list i{color:var(--c-brand-500);margin-top:5px;font-size:13px;}
.quote{
  margin:26px 0 0;padding:20px 22px;border-left:3px solid var(--c-brand-500);
  background:rgba(255,255,255,.08);border-radius:0 12px 12px 0;
  font-size:15.5px;line-height:1.85;color:#fff;
}
.img-frame{position:relative;overflow:hidden;border-radius:var(--r-img);box-shadow:var(--sh-card);}
.img-frame img{width:100%;height:100%;object-fit:cover;transition:transform .45s cubic-bezier(.2,.7,.3,1);}
.img-frame:hover img{transform:scale(1.03);}
.img-frame.sixteen-nine{aspect-ratio:16/9;}
.img-frame.four-three{aspect-ratio:4/3;}

/* ---------- FAQ ---------- */
.accordion-item{
  background:#fff;border:1px solid var(--c-line);border-radius:12px !important;
  margin-bottom:12px;overflow:hidden;
}
.accordion-button{
  width:100%;min-height:56px;padding:16px 22px;background:#fff;color:var(--c-ink-900);
  font-size:17px;font-weight:600;line-height:1.5;border:0;box-shadow:none;
  display:flex;align-items:center;gap:16px;
}
.accordion-button:not(.collapsed){color:var(--c-brand-600);background:#fff;box-shadow:none;}
.accordion-button:hover{color:var(--c-brand-600);}
.accordion-button:focus{box-shadow:none;border-color:transparent;}
.accordion-button::after{
  content:"+";margin-left:auto;flex:0 0 auto;width:26px;height:26px;
  display:grid;place-items:center;background-image:none !important;
  font-size:20px;font-weight:400;line-height:1;color:var(--c-brand-600);
  transition:transform var(--ease);
}
.accordion-button:not(.collapsed)::after{transform:rotate(45deg);}
.accordion-body{padding:0 22px 20px;font-size:16px;line-height:1.85;color:var(--c-ink-700);}

/* ---------- CTA 条 ---------- */
.cta-band{
  background:var(--c-brand-100);border:1px solid #CFE2F5;border-radius:var(--r-card);
  padding:40px;display:flex;align-items:center;justify-content:space-between;gap:32px;
}
.cta-band h2{font-size:clamp(22px,2.4vw,28px);margin-bottom:10px;}
.cta-band p{font-size:15.5px;color:var(--c-ink-700);max-width:620px;margin:0;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;flex:0 0 auto;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-footer);color:rgba(255,255,255,.72);padding:64px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:44px;}
.site-footer .brand{margin-bottom:18px;}
.site-footer .brand-mark{background:rgba(255,255,255,.12);color:#fff;}
.site-footer .brand-name{color:#fff;font-size:16px;}
.site-footer .brand-sub{color:rgba(255,255,255,.55);}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);margin-bottom:14px;max-width:340px;}
.footer-contact{font-size:13px;line-height:1.9;color:rgba(255,255,255,.6);}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-col li + li{margin-top:2px;}
.footer-col a{
  display:inline-block;font-size:14px;line-height:1.6;padding:8px 0;color:rgba(255,255,255,.72);
  transition:color var(--ease),padding-left var(--ease);
}
.footer-col a:hover{color:#fff;padding-left:2px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.16);padding:20px 0 26px;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.6);
}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  :root{--sp-section:80px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
}
@media (max-width:991.98px){
  :root{--sp-section:72px;}
  .container{padding-inline:20px;}
  .header-inner{min-height:68px;}
  .nav-toggle{display:inline-flex;}
  .nav-wrap{
    position:absolute;left:-20px;right:-20px;top:100%;display:none;
    flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border-bottom:1px solid var(--c-line);box-shadow:var(--sh-card);
    padding:12px 20px 20px;max-height:calc(100vh - 68px);overflow-y:auto;
  }
  .nav-wrap.show{display:flex;}
  .main-nav ul{flex-direction:column;align-items:stretch;gap:2px;}
  .main-nav > ul > li > a{padding:13px 12px;min-height:46px;border-radius:10px;}
  .main-nav > ul > li > a.active{background:var(--c-brand-100);}
  .main-nav > ul > li > a.active::after{display:none;}
  .mega{
    position:static;width:auto;transform:none;opacity:1;visibility:visible;pointer-events:auto;
    box-shadow:none;border-top:0;border-left:2px solid var(--c-brand-100);
    border-radius:0;padding:6px 0 6px 14px;margin:2px 0 10px;grid-template-columns:1fr;gap:16px;
  }
  .has-mega:hover .mega,.has-mega:focus-within .mega{transform:none;}
  .header-cta{margin-top:14px;}
  .header-cta .btn-accent{width:100%;height:48px;font-size:15px;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px;}
  .cta-actions{width:100%;}
  .cta-actions .btn-brand,.cta-actions .btn-outline-brand{flex:1 1 auto;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767.98px){
  :root{--sp-section:56px;}
  .container{padding-inline:16px;}
  .nav-wrap{left:-16px;right:-16px;padding-inline:16px;}
  .cat-hero{min-height:230px;padding:40px 0 36px;}
  .cat-hero h1{font-size:26px;}
  .cat-hero .hero-lead{font-size:15.5px;}
  .pill{padding:0 14px;font-size:13.5px;}
  .footer-grid{grid-template-columns:1fr;gap:24px;padding-bottom:32px;}
  .footer-bottom{flex-direction:column;gap:6px;}
  .cta-band{padding:26px 22px;}
  .cta-actions .btn-brand,.cta-actions .btn-outline-brand{width:100%;}
  .cmp-panel{padding:22px;}
  .dark-band .quote{font-size:15px;}
}
@media (max-width:399.98px){
  .brand-name{font-size:15.5px;}
  .brand-sub{font-size:10px;}
}

/* roulang page: category2 */
:root{
  --c-brand-700:#14507F;
  --c-brand-600:#1F6FB2;
  --c-brand-500:#3E8FCF;
  --c-brand-100:#E4EFFA;
  --c-ink-900:#12263A;
  --c-ink-700:#3A5266;
  --c-ink-500:#6B8098;
  --c-ink-300:#9DAEC0;
  --c-line:#E2EBF4;
  --c-bg:#F5F8FC;
  --c-surface:#FFFFFF;
  --c-accent-500:#F2A03D;
  --c-accent-600:#DE8A22;
  --c-mint-500:#2FB3A0;
  --c-footer:#0E3B63;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --r-input:10px;
  --sh-card:0 2px 4px rgba(18,38,58,.04), 0 12px 28px rgba(18,38,58,.06);
  --sh-hover:0 18px 36px rgba(18,38,58,.10);
  --sp-section:96px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --t:.25s cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:'PingFang SC','Microsoft YaHei','Hiragino Sans GB','Noto Sans SC',system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--c-ink-700);
  background:var(--c-bg);
  font-variant-numeric:tabular-nums;
}
h1,h2,h3,h4{margin:0 0 16px;color:var(--c-ink-900);line-height:1.35;font-weight:700}
h1{font-size:40px}
h2{font-size:32px}
h3{font-size:20px;font-weight:600}
h4{font-size:17px;font-weight:600}
p{margin:0 0 18px}
img{max-width:100%;display:block}
a{color:var(--c-brand-600);text-decoration:none;transition:color var(--t),background-color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t)}
a:hover{color:var(--c-brand-500)}
ul,ol{margin:0;padding:0}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--c-brand-600);outline-offset:2px}
::selection{background:var(--c-brand-100);color:var(--c-brand-700)}

.container{width:100%;max-width:1220px;margin:0 auto;padding-left:24px;padding-right:24px}
@media (max-width:575.98px){.container{padding-left:16px;padding-right:16px}}

/* ---------- 通用组件 ---------- */
.btn-base{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:var(--t);white-space:nowrap;
}
.btn-primary-x{background:var(--c-brand-600);color:#fff}
.btn-primary-x:hover{background:var(--c-brand-700);color:#fff;transform:translateY(-1px);box-shadow:0 12px 22px rgba(20,80,127,.24)}
.btn-accent{background:var(--c-accent-500);color:#fff}
.btn-accent:hover{background:var(--c-accent-600);color:#fff;transform:translateY(-1px);box-shadow:0 12px 22px rgba(222,138,34,.28)}
.btn-ghost{background:transparent;border-color:var(--c-brand-600);color:var(--c-brand-600)}
.btn-ghost:hover{background:rgba(31,111,178,.08);color:var(--c-brand-700);border-color:var(--c-brand-700)}
.btn-sm-x{height:42px;padding:0 18px;font-size:14px}
.btn-base:active{transform:translateY(0) scale(.99)}
.btn-base[disabled],.btn-base.is-disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}

.badge-x{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:var(--r-pill);font-size:14px;font-weight:500;line-height:1.2}
.badge-brand{background:var(--c-brand-100);color:var(--c-brand-700)}
.badge-mint{background:rgba(47,179,160,.12);color:#1F8C7C}
.badge-accent{background:rgba(242,160,61,.14);color:#B96F12}
.badge-soft{background:#fff;border:1px solid var(--c-line);color:var(--c-ink-700)}

.tag-x{display:inline-block;padding:5px 10px;border-radius:8px;font-size:13px;background:var(--c-brand-100);color:var(--c-brand-700)}

.section{padding:var(--sp-section) 0}
.section-white{background:var(--c-surface);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.section-head{max-width:820px;margin-bottom:40px}
.section-head h2{margin-bottom:14px}
.section-head p{margin:0;font-size:16px;color:var(--c-ink-500);line-height:1.8}
.eyebrow{display:inline-block;font-size:13px;letter-spacing:.12em;color:var(--c-brand-600);font-weight:600;margin-bottom:12px;text-transform:uppercase}

/* ---------- 顶部提示条 ---------- */
.top-bar{background:var(--c-brand-100);color:var(--c-brand-700);font-size:13.5px}
.top-bar .container{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:40px}
.top-bar p{margin:0;display:flex;align-items:center;gap:8px}
.top-close{color:var(--c-brand-700);opacity:.6;display:inline-flex;width:24px;height:24px;align-items:center;justify-content:center}

/* ---------- 页头与导航 ---------- */
.site-header{position:sticky;top:0;z-index:1040;background:#fff;border-bottom:1px solid var(--c-line);transition:box-shadow var(--t)}
.site-header:has(.collapse.show){box-shadow:var(--sh-card)}
.header-inner{display:flex;align-items:center;gap:24px;min-height:76px}
.brand{display:flex;align-items:center;gap:10px;color:var(--c-ink-900);flex:0 0 auto}
.brand:hover{color:var(--c-brand-700)}
.brand-mark{width:38px;height:38px;border-radius:11px;background:var(--c-brand-100);color:var(--c-brand-600);display:grid;place-items:center;flex:0 0 auto}
.brand-name{display:block;font-size:17px;font-weight:700;line-height:1.25;letter-spacing:.2px}
.brand-sub{display:block;font-size:10.5px;letter-spacing:.14em;color:var(--c-ink-500);text-transform:uppercase}

.main-nav{margin-left:auto}
.main-nav > ul{display:flex;align-items:center;gap:4px;list-style:none}
.main-nav > ul > li{position:relative}
.main-nav > ul > li > a{
  display:inline-flex;align-items:center;gap:6px;height:44px;padding:0 14px;
  font-size:15px;font-weight:500;color:var(--c-ink-700);border-radius:8px;position:relative;
}
.main-nav > ul > li > a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:6px;height:2px;border-radius:2px;
  background:var(--c-brand-600);transform:scaleX(0);transform-origin:left;transition:transform var(--t);
}
.main-nav > ul > li > a:hover{color:var(--c-brand-600)}
.main-nav > ul > li > a:hover::after{transform:scaleX(1)}
.main-nav > ul > li > a.active{color:var(--c-brand-700);font-weight:600}
.main-nav > ul > li > a.active::after{transform:scaleX(1)}
.nav-caret{font-size:11px;opacity:.7;transition:transform var(--t)}
.has-mega:hover .nav-caret{transform:rotate(180deg)}

.mega{
  position:absolute;top:100%;left:-120px;width:760px;z-index:1050;
  background:#fff;border-radius:12px;border-top:3px solid var(--c-brand-600);
  box-shadow:var(--sh-hover);padding:28px;
  display:grid;grid-template-columns:1.05fr 1fr;gap:28px;
  opacity:0;visibility:hidden;transform:translateY(8px);transition:var(--t);
}
.mega::before{content:"";position:absolute;top:-16px;left:0;right:0;height:16px}
.has-mega:hover .mega,.has-mega:focus-within .mega{opacity:1;visibility:visible;transform:translateY(0)}
.mega-col h4{margin:0 0 14px;font-size:13px;letter-spacing:.1em;color:var(--c-ink-500);text-transform:uppercase;font-weight:600}
.mega-list{list-style:none;display:grid;gap:4px}
.mega-list a{display:block;padding:12px 14px;border-radius:10px;min-height:44px}
.mega-list a:hover{background:var(--c-brand-100)}
.m-t{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:15px;font-weight:600;color:var(--c-ink-900)}
.m-t i{font-size:12px;color:var(--c-brand-500);transition:transform var(--t)}
.m-d{display:block;font-size:13px;color:var(--c-ink-500);margin-top:2px;line-height:1.6}
.mega-list a:hover .m-t{color:var(--c-brand-500)}
.mega-list a:hover .m-t i{transform:translateX(2px)}
.mega-cards{display:grid;gap:12px}
.mega-card{display:block;background:var(--c-brand-100);border-radius:12px;padding:16px 18px;min-height:44px;transition:var(--t)}
.mega-card:hover{background:#D6E7F8;transform:translateY(-2px)}
.mc-t{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:14.5px;font-weight:600;color:var(--c-brand-700)}
.mc-t i{font-size:12px;transition:transform var(--t)}
.mega-card:hover .mc-t i{transform:translateX(2px)}
.mc-d{display:block;font-size:13px;color:var(--c-ink-500);margin-top:4px}

.header-cta{flex:0 0 auto}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);
  border:1px solid var(--c-line);background:#fff;color:var(--c-ink-900);
  align-items:center;justify-content:center;font-size:17px;
}
.nav-toggle:hover{border-color:var(--c-brand-500);color:var(--c-brand-600)}
.nav-cta{display:none}

/* ---------- 分类 Hero ---------- */
.cat-hero{
  position:relative;display:flex;align-items:center;min-height:280px;padding:36px 0 44px;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--c-line);
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(255,255,255,.97) 0%,rgba(245,248,252,.92) 48%,rgba(228,239,250,.82) 100%);
}
.cat-hero .container{position:relative;z-index:2}
.breadcrumb{display:flex;flex-wrap:wrap;gap:6px;list-style:none;margin:0 0 16px;padding:0;font-size:13px;color:var(--c-ink-500)}
.breadcrumb-item a{color:var(--c-ink-500)}
.breadcrumb-item a:hover{color:var(--c-brand-600)}
.breadcrumb-item+.breadcrumb-item::before{content:"/";margin-right:6px;color:var(--c-ink-300)}
.breadcrumb-item.active{color:var(--c-ink-900)}
.cat-hero h1{font-size:38px;margin-bottom:14px;max-width:860px}
.cat-hero .hero-sub{font-size:16.5px;color:var(--c-ink-500);margin:0;max-width:760px}
.pill-nav{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.pill-nav a{
  display:inline-flex;align-items:center;height:40px;padding:0 18px;border-radius:var(--r-pill);
  border:1px solid var(--c-line);background:#fff;color:var(--c-ink-700);font-size:14px;font-weight:500;
}
.pill-nav a:hover{border-color:var(--c-brand-500);color:var(--c-brand-600);background:var(--c-brand-100)}
.pill-nav a.is-active{background:var(--c-brand-600);border-color:var(--c-brand-600);color:#fff}
.pill-nav a.is-active:hover{background:var(--c-brand-700);color:#fff}

/* ---------- 说明区 ---------- */
.intro-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.intro-text p{max-width:660px}
.intro-text p:last-of-type{margin-bottom:0}
.intro-figure{border-radius:var(--r-img);overflow:hidden;box-shadow:var(--sh-card);border:1px solid var(--c-line);background:#fff}
.intro-figure img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-img)}
.intro-figure figcaption{font-size:13px;color:var(--c-ink-500);padding:12px 16px;border-top:1px solid var(--c-line)}
.quote-x{
  margin:28px 0 0;padding:20px 22px;border-left:3px solid var(--c-brand-600);
  background:var(--c-brand-100);border-radius:0 var(--r-card) var(--r-card) 0;
  font-size:15.5px;line-height:1.85;color:var(--c-brand-700);max-width:720px;
}
.quote-x cite{display:block;margin-top:10px;font-size:13px;font-style:normal;color:var(--c-ink-500)}

/* ---------- 要点卡片 ---------- */
.point-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:28px;height:100%;box-shadow:var(--sh-card);transition:var(--t);
}
.point-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:#D3E2F2}
.point-card .num{
  display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;
  border-radius:11px;background:var(--c-brand-100);color:var(--c-brand-700);
  font-weight:700;font-size:15px;margin-bottom:18px;
}
.point-card h3{font-size:18px;margin-bottom:10px}
.point-card p{margin:0 0 14px;font-size:14.5px;color:var(--c-ink-500);line-height:1.8}
.point-card .usr{font-size:13px;color:var(--c-ink-500)}
.point-card .usr strong{color:var(--c-brand-700);font-weight:600}

/* ---------- 时间线 ---------- */
.timeline{position:relative;list-style:none;margin:0;padding:6px 0 0}
.timeline::before{
  content:"";position:absolute;left:23px;top:14px;bottom:26px;width:2px;border-radius:2px;
  background:linear-gradient(180deg,var(--c-brand-500),rgba(62,143,207,.18));
}
.tl-item{position:relative;padding-left:76px;padding-bottom:32px}
.tl-item:last-child{padding-bottom:0}
.tl-num{
  position:absolute;left:0;top:0;width:48px;height:48px;border-radius:50%;
  background:#fff;border:2px solid var(--c-brand-500);color:var(--c-brand-700);
  display:grid;place-items:center;font-size:16px;font-weight:700;box-shadow:var(--sh-card);
}
.tl-body{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:24px 26px;box-shadow:var(--sh-card);transition:var(--t);
}
.tl-body:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:#D3E2F2}
.tl-body h3{font-size:18px;margin-bottom:10px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.tl-body p{margin:0;font-size:15px;color:var(--c-ink-500);line-height:1.85}
.tl-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.tl-meta span{font-size:13px;padding:5px 10px;border-radius:8px;background:var(--c-bg);color:var(--c-ink-500);border:1px solid var(--c-line)}

/* ---------- 深色板块 ---------- */
.dark-band{background:var(--c-brand-700);padding:var(--sp-section) 0;color:rgba(255,255,255,.76)}
.dark-band h2{color:#fff}
.dark-band .section-head p{color:rgba(255,255,255,.7)}
.dark-card{
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);
  border-radius:var(--r-card);padding:24px;height:100%;transition:var(--t);
}
.dark-card:hover{background:rgba(255,255,255,.11);transform:translateY(-3px)}
.dark-card i{font-size:18px;color:#8CC6F2;margin-bottom:14px;display:block}
.dark-card h3{color:#fff;font-size:17px;margin-bottom:8px}
.dark-card p{margin:0;font-size:14px;line-height:1.8;color:rgba(255,255,255,.72)}

/* ---------- 对照表 ---------- */
.table-wrap{
  overflow-x:auto;background:#fff;border:1px solid var(--c-line);
  border-radius:var(--r-card);box-shadow:var(--sh-card);
}
.cmp-table{width:100%;min-width:780px;border-collapse:collapse;font-size:15px}
.cmp-table th{
  background:var(--c-brand-100);color:var(--c-brand-700);font-weight:600;text-align:left;
  padding:16px;font-size:14.5px;white-space:nowrap;border-bottom:1px solid var(--c-line);
}
.cmp-table td{padding:16px;border-top:1px solid var(--c-line);color:var(--c-ink-700);vertical-align:top;line-height:1.75}
.cmp-table tbody tr:hover{background:var(--c-bg)}
.cmp-table td:first-child{color:var(--c-ink-900);font-weight:600;white-space:nowrap}
.table-note{font-size:13px;color:var(--c-ink-500);margin:14px 0 0}

/* ---------- FAQ ---------- */
.accordion{--bs-accordion-border-width:0;--bs-accordion-bg:transparent}
.accordion .accordion-item{
  background:#fff;border:1px solid var(--c-line);border-radius:12px;
  margin-bottom:12px;overflow:hidden;transition:var(--t);
}
.accordion .accordion-item:hover{border-color:#CFE0F1;box-shadow:var(--sh-card)}
.accordion .accordion-header{margin:0}
.accordion-button{
  display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;
  min-height:56px;padding:16px 20px;font-size:17px;font-weight:600;color:var(--c-ink-900);
  background:#fff;border:0;text-align:left;box-shadow:none;
}
.accordion-button:not(.collapsed){color:var(--c-brand-600);background:#fff;box-shadow:none}
.accordion-button::after{display:none}
.accordion-button i{flex:0 0 auto;color:var(--c-brand-600);font-size:14px;transition:transform var(--t)}
.accordion-button[aria-expanded="true"] i{transform:rotate(45deg)}
.accordion-button:focus{box-shadow:none;outline:none}
.accordion-button:focus-visible{outline:2px solid var(--c-brand-600);outline-offset:-3px}
.accordion-body{padding:0 20px 20px;font-size:16px;line-height:1.85;color:var(--c-ink-700)}

/* ---------- 导流卡与 CTA ---------- */
.guide-card{
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:26px 28px;box-shadow:var(--sh-card);transition:var(--t);
}
.guide-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover)}
.guide-card h3{font-size:18px;margin-bottom:6px}
.guide-card p{margin:0;font-size:14.5px;color:var(--c-ink-500)}
.cta-band{
  background:var(--c-brand-100);border:1px solid #D2E4F6;border-radius:var(--r-card);
  padding:36px;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-band h2{font-size:26px;margin-bottom:10px}
.cta-band p{margin:0;max-width:620px;color:var(--c-ink-700)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-footer);color:rgba(255,255,255,.72);padding-top:64px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.site-footer .brand{color:#fff;margin-bottom:4px}
.site-footer .brand-mark{background:rgba(255,255,255,.12);color:#fff}
.site-footer .brand-name{color:#fff}
.site-footer .brand-sub{color:rgba(255,255,255,.55)}
.footer-desc{font-size:14px;line-height:1.85;margin:16px 0 14px;max-width:360px;color:rgba(255,255,255,.72)}
.footer-contact{font-size:13px;line-height:1.9;color:rgba(255,255,255,.58);margin:0}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin:0 0 16px}
.footer-col ul{list-style:none;display:grid;gap:10px}
.footer-col a{color:rgba(255,255,255,.72);font-size:14px;display:inline-block}
.footer-col a:hover{color:#fff;padding-left:2px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.16);padding:20px 0 28px;
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.58);
}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  h1{font-size:34px}
  .cat-hero h1{font-size:32px}
  .mega{width:680px;left:-160px}
}
@media (max-width:991.98px){
  :root{--sp-section:72px}
  h2{font-size:26px}
  .header-inner{flex-wrap:wrap;padding-top:10px;padding-bottom:10px;gap:12px;min-height:0}
  .brand{margin-right:auto}
  .nav-toggle{display:inline-flex}
  .header-cta{display:none}
  .main-nav{flex-basis:100%;order:3;margin-left:0}
  .main-nav > ul{flex-direction:column;align-items:stretch;gap:2px;padding-top:8px}
  .main-nav > ul > li > a{
    height:48px;justify-content:space-between;padding:0 14px;border-radius:10px;
    border-bottom:1px solid var(--c-line);
  }
  .main-nav > ul > li > a::after{display:none}
  .main-nav > ul > li > a.active{background:var(--c-brand-100);color:var(--c-brand-700)}
  .mega{
    position:static;width:auto;left:auto;opacity:1;visibility:visible;transform:none;
    box-shadow:none;border:1px solid var(--c-line);border-top:1px solid var(--c-line);
    border-radius:12px;padding:16px;margin:10px 0 6px;grid-template-columns:1fr;gap:18px;
  }
  .mega::before{display:none}
  .nav-cta{display:inline-flex;width:100%;margin-top:12px}
  .intro-grid{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767.98px){
  :root{--sp-section:56px}
  h1{font-size:28px}
  .cat-hero{min-height:auto;padding:28px 0 36px}
  .cat-hero h1{font-size:26px}
  .cat-hero .hero-sub{font-size:15px}
  .cta-band{padding:26px}
  .cta-band h2{font-size:22px}
  .cta-band .btn-base{width:100%}
  .guide-card{flex-direction:column;align-items:flex-start}
  .guide-card .btn-base{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:30px}
}
@media (max-width:575.98px){
  .timeline::before{left:16px}
  .tl-item{padding-left:54px}
  .tl-num{width:34px;height:34px;font-size:14px;border-width:2px}
  .tl-body{padding:20px}
  .point-card{padding:22px}
  .top-bar p span.txt{display:none}
}