/* roulang page: index */
*,*::before,*::after{box-sizing:border-box}
:root{
  --blue:#2457D6;--blue-d:#173FA6;--blue-l:#E8EEFC;
  --ink:#0F2544;--sub:#5A6B85;--line:#E3E8F2;--bg:#F6F8FC;
  --straw:#E23E57;--cherry:#B3244A;--durian:#F2A93B;--melon:#2E9E6B;
  --r:12px;
  --sh:0 1px 2px rgba(15,37,68,.05);
  --sh-h:0 10px 28px -14px rgba(15,37,68,.28);
}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.75 -apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700}
p,dl,dd,blockquote,figure{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{display:block;max-width:100%}
a{color:var(--blue);text-decoration:none;transition:color .16s ease}
a:hover{color:var(--blue-d)}
button,input,select,textarea{font:inherit;color:inherit}
.num{font-family:"Barlow Condensed","Oswald","Helvetica Neue",Arial,sans-serif;font-variant-numeric:tabular-nums;letter-spacing:.02em}
.container{max-width:1200px;margin:0 auto;padding:0 32px}

/* 顶部信息条 */
.topbar{background:var(--ink);color:#C9D6EE;font-size:13px}
.topbar .container{display:flex;align-items:center;gap:28px;height:36px;overflow:hidden;white-space:nowrap}
.topbar b{color:#fff;font-weight:600}

/* 导航 */
.nav{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line)}
.nav .container{display:flex;align-items:center;gap:24px;height:70px}
.brand{display:flex;align-items:center;gap:11px;color:var(--ink)}
.brand:hover{color:var(--ink)}
.logo-mark{width:40px;height:40px;border-radius:10px;background:var(--blue);color:#fff;display:grid;place-items:center;font-size:18px;font-weight:800;flex:0 0 auto}
.brand-txt b{display:block;font-size:16px;font-weight:800;line-height:1.25}
.brand-txt small{display:block;font-size:11px;color:var(--sub);letter-spacing:.06em}
.nav-links{display:flex;align-items:center;gap:22px;margin-left:auto;font-size:15px}
.nav-links a{color:var(--ink);padding:8px 0;border-bottom:2px solid transparent}
.nav-links a:hover,.nav-links a.active{color:var(--blue);border-bottom-color:var(--blue)}
.nav-toggle{display:none}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:48px;padding:0 22px;border:1px solid transparent;border-radius:8px;font-size:15px;font-weight:600;cursor:pointer;transition:background .16s ease,color .16s ease,border-color .16s ease,transform .16s ease}
.btn:focus-visible{outline:2px solid var(--blue);outline-offset:2px}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-d);color:#fff;transform:translateY(-1px)}
.btn-ghost{background:#fff;color:var(--blue);border-color:var(--blue)}
.btn-ghost:hover{background:var(--blue-l);color:var(--blue-d)}

/* 首屏 */
.hero{padding:64px 0 76px}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:56px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:5px 14px;font-size:13px;color:var(--blue-d);font-weight:600;box-shadow:var(--sh)}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--melon)}
.hero h1{font-size:50px;line-height:1.12;font-weight:800;letter-spacing:-.01em;margin-top:18px}
.hero h1 .hl{color:var(--blue);border-bottom:6px solid var(--durian);padding-bottom:2px;display:inline-block}
.hero-sub{font-size:19px;font-weight:600;margin-top:22px}
.hero-desc{font-size:15.5px;color:var(--sub);margin-top:10px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-badges{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-badges li{flex:1 1 130px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px 14px;box-shadow:var(--sh)}
.hero-badges b{display:block;font-size:22px;color:var(--blue);line-height:1.15}
.hero-badges span{display:block;font-size:12px;color:var(--sub);margin-top:2px}
.hero-figure{position:relative;border-radius:16px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-h);background:#fff}
.hero-figure img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-figure figcaption{position:absolute;left:16px;bottom:16px;background:rgba(255,255,255,.95);border-radius:10px;padding:9px 14px;font-size:13px;color:var(--ink);box-shadow:var(--sh)}

/* 板块基础 */
.sec{padding:76px 0}
.sec-white{background:#fff}
.sec-tight{padding:0 0 76px}
.sec-head{max-width:760px;margin-bottom:32px}
.kicker{display:inline-block;font-size:13px;font-weight:700;color:var(--blue);letter-spacing:.08em}
.sec-head h2{font-size:32px;margin-top:10px;padding-left:18px;position:relative}
.sec-head h2::before{content:"";position:absolute;left:0;top:7px;bottom:7px;width:6px;border-radius:3px;background:var(--blue)}
.sec-head p{color:var(--sub);font-size:15.5px;margin-top:12px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px;box-shadow:var(--sh);transition:box-shadow .16s ease,transform .16s ease,border-color .16s ease}
.card:hover{box-shadow:var(--sh-h);transform:translateY(-2px);border-color:var(--blue-l)}

/* 卖点三连 */
.adv-grid{display:grid;grid-template-columns:7fr 5fr;gap:24px}
.adv-side{display:grid;gap:24px}
.pill{display:inline-block;background:var(--blue-l);color:var(--blue-d);font-size:12px;font-weight:700;padding:4px 10px;border-radius:6px}
.adv-main h3{font-size:21px;margin-top:14px}
.adv-main p{color:var(--sub);font-size:15px;margin-top:12px}
.adv-list{display:flex;flex-wrap:wrap;gap:26px;margin-top:22px;padding-top:20px;border-top:1px solid var(--line);font-size:13.5px;color:var(--sub)}
.adv-list b{font-size:24px;color:var(--blue);margin-right:6px}
.adv-side h3{font-size:18px}
.adv-side p{color:var(--sub);font-size:14.5px;margin-top:10px}

/* 场景卡 */
.scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.scene{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--sh);transition:box-shadow .16s ease,transform .16s ease}
.scene:hover{box-shadow:var(--sh-h);transform:translateY(-2px)}
.scene img{width:100%;aspect-ratio:4/3;object-fit:cover}
.scene-body{padding:18px}
.tag{display:inline-block;font-size:12px;font-weight:700;padding:3px 10px;border-radius:6px;color:#fff;background:var(--fc,var(--blue))}
.scene-body h3{font-size:16px;margin-top:10px}
.scene-dl{display:grid;gap:6px;margin-top:12px}
.scene-dl div{display:flex;justify-content:space-between;gap:10px;font-size:13px}
.scene-dl dt{color:var(--sub)}
.scene-dl dd{font-weight:600}

/* 数据条 */
.stats-band{background:var(--ink);color:#fff;border-radius:16px;padding:36px 32px;display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat b{display:block;font-size:36px;line-height:1.1;color:#fff}
.stat span{display:block;font-size:13.5px;color:#9FB4D6;margin-top:6px}

/* 规格矩阵 */
.spec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.spec-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:20px;box-shadow:var(--sh);transition:box-shadow .16s ease,transform .16s ease,border-color .16s ease}
.spec-card:hover{box-shadow:var(--sh-h);transform:translateY(-2px);border-color:var(--blue-l)}
.spec-top{display:flex;align-items:center;justify-content:space-between;gap:10px}
.spec-top b{font-size:21px;color:var(--blue)}
.badge{font-size:12px;font-weight:700;padding:3px 9px;border-radius:6px}
.badge-on{background:#E6F6EE;color:#1F7A52}
.badge-cus{background:var(--blue-l);color:var(--blue-d)}
.badge-pro{background:#FEF3E2;color:#A86A0C}
.spec-size{font-size:14px;color:var(--sub);margin-top:10px}
.spec-dl{display:grid;gap:6px;margin-top:12px;padding-top:12px;border-top:1px solid var(--line)}
.spec-dl div{display:flex;justify-content:space-between;font-size:13.5px}
.spec-dl dt{color:var(--sub)}
.spec-dl dd{font-weight:600}
.table-wrap{margin-top:28px;overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:#fff}
.spec-table{width:100%;border-collapse:collapse;font-size:14.5px;min-width:820px}
.spec-table th{background:var(--blue-l);color:var(--blue-d);text-align:left;padding:14px 16px;font-weight:700;white-space:nowrap}
.spec-table td{padding:14px 16px;border-top:1px solid var(--line);white-space:nowrap;color:var(--sub)}
.spec-table tbody tr:hover td{background:#F8FAFF}
.spec-table td:first-child{font-weight:700;color:var(--ink)}
.spec-table th:first-child,.spec-table td:first-child{position:sticky;left:0;background:#fff;z-index:1}
.spec-table th:first-child{background:var(--blue-l)}

/* 材质工艺 */
.layer-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center}
.layer-stack{display:grid;gap:6px}
.layer{display:flex;justify-content:space-between;align-items:center;padding:14px 18px;border-radius:8px;font-size:14px;font-weight:600;color:var(--ink)}
.layer span:last-child{font-size:12px;font-weight:600;color:var(--sub)}
.l1{background:#DCE6FB}
.l2{background:#C3D3F7}
.l3{background:#EDF1FA}
.craft-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:18px}
.craft-tags li{background:#fff;border:1px solid var(--blue);color:var(--blue-d);border-radius:8px;padding:6px 14px;font-size:13.5px;font-weight:600}
.layer-info p{font-size:15px;color:var(--sub)}

/* 流程 */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:st}
.step{position:relative;padding-top:58px}
.step::before{counter-increment:st;content:counter(st,decimal-leading-zero);position:absolute;top:0;left:0;font-family:"Barlow Condensed","Oswald",Arial,sans-serif;font-size:36px;font-weight:700;line-height:1;color:var(--blue);opacity:.35}
.step::after{content:"";position:absolute;top:18px;left:56px;right:-24px;height:1px;background:var(--line)}
.step:last-child::after{display:none}
.step h3{font-size:17px}
.step p{font-size:14px;color:var(--sub);margin-top:8px}

/* 分类频道 */
.chan-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.chan{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px;box-shadow:var(--sh);color:var(--ink);transition:box-shadow .16s ease,transform .16s ease,border-color .16s ease}
.chan:hover{box-shadow:var(--sh-h);transform:translateY(-2px);border-color:var(--blue);color:var(--ink)}
.chan h3{font-size:17px}
.chan p{font-size:14px;color:var(--sub);margin-top:10px}
.chan span{display:inline-block;margin-top:16px;font-size:13.5px;font-weight:700;color:var(--blue)}

/* 榜单 */
.rank{border-top:2px solid var(--blue)}
.rank-item{display:grid;grid-template-columns:56px 1fr 90px 190px 80px 56px;align-items:center;gap:16px;padding:14px 8px;border-bottom:1px solid var(--line);font-size:14.5px;transition:background .16s ease}
.rank-item:hover{background:#fff}
.rank-no{font-size:22px;color:var(--sub)}
.rank-item:nth-child(-n+3) .rank-no{color:var(--blue)}
.rank-name{font-weight:600}
.rank-load{color:var(--sub)}
.rank-tags{display:flex;gap:6px;flex-wrap:wrap;font-style:normal}
.rank-tags i{font-style:normal;font-size:12px;font-weight:600;padding:2px 8px;border-radius:5px;background:var(--blue-l);color:var(--blue-d)}
.rank-score{font-size:18px;color:var(--cherry)}
.rank-item a{font-size:13.5px;font-weight:600}

/* 口碑 */
.quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.quote{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px;box-shadow:var(--sh);display:flex;flex-direction:column;gap:16px}
.q-head{display:flex;align-items:center;gap:12px}
.avatar{width:44px;height:44px;border-radius:50%;background:var(--blue-l);color:var(--blue-d);display:grid;place-items:center;font-weight:700;font-size:16px;flex:0 0 auto}
.q-head b{display:block;font-size:15px}
.q-head small{display:block;font-size:12.5px;color:var(--sub)}
.quote blockquote{font-size:14.5px;line-height:1.8;border-left:3px solid var(--blue-l);padding-left:14px}
.q-meta{font-size:13px;color:var(--sub);font-weight:600;margin-top:auto}

/* 对比 */
.compare-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:#fff}
.compare-table{width:100%;border-collapse:collapse;font-size:15px;min-width:660px}
.compare-table th{background:var(--blue-l);color:var(--blue-d);text-align:left;padding:15px 18px;font-weight:700}
.compare-table td{padding:15px 18px;border-top:1px solid var(--line);color:var(--sub)}
.compare-table td:first-child{color:var(--ink);font-weight:600}
.compare-table td.win{background:#F4F8FF;color:var(--ink);font-weight:600}
.compare-table td.win::before{content:"✓";color:var(--melon);font-weight:700;margin-right:8px}

/* 资讯 */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--sh);transition:box-shadow .16s ease,transform .16s ease}
.news-card:hover{box-shadow:var(--sh-h);transform:translateY(-2px)}
.news-card a{color:var(--ink);display:block}
.news-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.news-body{padding:16px 18px 20px}
.news-meta{display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--sub);margin-bottom:8px}
.news-tag{background:var(--blue-l);color:var(--blue-d);border-radius:5px;padding:2px 8px;font-size:12px;font-weight:600}
.news-body h3{font-size:16px;line-height:1.5}

/* 异议拆解 */
.obj-list{display:grid;gap:14px}
.obj{display:grid;grid-template-columns:.85fr 1.15fr;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:#fff}
.obj-q{background:#EEF1F7;padding:20px 22px;display:flex;align-items:flex-start;gap:10px;font-weight:600;font-size:15px;color:var(--ink)}
.obj-a{padding:20px 22px;font-size:14.5px;color:var(--sub)}
.obj-q i,.obj-a i{flex:0 0 auto;font-style:normal;font-size:12px;font-weight:700;padding:3px 8px;border-radius:5px;margin-top:3px}
.obj-q i{background:#DDE3EE;color:var(--sub)}
.obj-a i{background:var(--blue-l);color:var(--blue-d)}

/* 保障条 */
.guarantee{background:var(--blue-l);border-radius:16px;padding:32px;display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.guarantee li i{display:grid;place-items:center;width:34px;height:34px;border-radius:9px;background:#fff;color:var(--blue);font-style:normal;font-weight:700;margin-bottom:10px}
.guarantee b{display:block;font-size:15.5px}
.guarantee p{font-size:13.5px;color:var(--sub);margin-top:4px}

/* 表单 */
.form-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:32px;align-items:start}
.lead-form{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:28px;box-shadow:var(--sh)}
.lead-form h2{font-size:24px;margin-bottom:8px}
.lead-form > p{font-size:14.5px;color:var(--sub);margin-bottom:22px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--sub);margin-bottom:6px}
.field input,.field select,.field textarea{width:100%;height:48px;padding:0 14px;border:1px solid var(--line);border-radius:8px;background:#fff;font-size:15px;transition:border-color .16s ease,box-shadow .16s ease}
.field textarea{height:96px;padding:12px 14px;resize:vertical;line-height:1.6}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(36,87,214,.14)}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.lead-form .btn{width:100%;margin-top:6px}
.contact-card{background:var(--ink);color:#C9D6EE;border-radius:var(--r);padding:28px}
.contact-card h3{color:#fff;font-size:19px}
.contact-card ul{display:grid;gap:16px;margin-top:20px}
.contact-card li{font-size:14px;line-height:1.7}
.contact-card li b{display:block;font-size:12.5px;color:#8FA3C4;font-weight:600;margin-bottom:2px}
.contact-card li span{color:#fff;font-weight:600}

/* FAQ */
.faq{display:grid;gap:12px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:0 22px;box-shadow:var(--sh);transition:border-color .16s ease}
.faq details[open]{border-color:var(--blue-l)}
.faq summary{cursor:pointer;padding:18px 0;font-size:16px;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:16px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:20px;font-weight:400;color:var(--blue);flex:0 0 auto}
.faq details[open] summary::after{content:"−"}
.faq details p{padding:0 0 20px;font-size:14.5px;color:var(--sub)}

/* 页脚 */
.footer{background:var(--ink);color:#B9C8E0;padding:60px 0 28px}
.footer h4{color:#fff;font-size:15px;margin-bottom:16px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.foot-grid ul{display:grid;gap:10px}
.footer a{color:#B9C8E0;font-size:14px}
.footer a:hover{color:#fff}
.foot-brand p{font-size:14px;margin-top:16px;line-height:1.75}
.foot-brand .brand-txt b{color:#fff}
.foot-brand .brand-txt small{color:#8FA3C4}
.foot-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;border-top:1px solid rgba(255,255,255,.12);margin-top:40px;padding-top:22px;font-size:13px;color:#8FA3C4}

/* 底部转化条 */
.sticky-cta{display:none}

@media (max-width:1024px){
  .container{padding:0 24px}
  .nav .container{height:64px}
  .nav-cta{display:none}
  .nav-toggle{display:grid;place-items:center;margin-left:auto;width:44px;height:44px;background:#fff;border:1px solid var(--line);border-radius:9px;cursor:pointer;position:relative;z-index:90}
  .nav-toggle i{display:block;width:18px;height:2px;background:var(--ink);position:relative}
  .nav-toggle i::before,.nav-toggle i::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink)}
  .nav-toggle i::before{top:-6px}
  .nav-toggle i::after{top:6px}
  .nav-links{display:none;position:fixed;top:0;right:0;bottom:0;width:min(300px,84vw);background:#fff;flex-direction:column;align-items:stretch;gap:0;margin:0;padding:86px 22px 22px;box-shadow:-18px 0 48px rgba(15,37,68,.18);z-index:80;overflow-y:auto}
  .nav-links.open{display:flex}
  .nav-links a{padding:15px 0;border-bottom:1px solid var(--line);font-size:16px}
  .hero{padding:48px 0 60px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero h1{font-size:38px}
  .adv-grid{grid-template-columns:1fr}
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .stats-band{grid-template-columns:repeat(2,1fr);padding:28px 24px}
  .spec-grid{grid-template-columns:repeat(2,1fr)}
  .layer-grid{grid-template-columns:1fr;gap:28px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .step::after{display:none}
  .chan-grid{grid-template-columns:repeat(2,1fr)}
  .rank-item{grid-template-columns:44px 1fr 80px 70px 48px;font-size:14px}
  .rank-tags{display:none}
  .quotes{grid-template-columns:1fr}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .obj{grid-template-columns:1fr}
  .guarantee{grid-template-columns:repeat(2,1fr)}
  .form-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:repeat(2,1fr);gap:32px}
  body{padding-bottom:78px}
  .sticky-cta{display:flex;align-items:center;gap:12px;position:fixed;left:0;right:0;bottom:0;z-index:70;background:#fff;border-top:1px solid var(--line);padding:10px 16px;box-shadow:0 -8px 24px rgba(15,37,68,.08)}
  .sticky-cta p{flex:1 1 auto;font-size:12px;color:var(--sub);line-height:1.4}
  .sticky-cta .btn{height:44px;padding:0 14px;font-size:14px;flex:0 0 auto}
}

@media (max-width:768px){
  .container{padding:0 20px}
  .sec{padding:52px 0}
  .sec-tight{padding:0 0 52px}
  .sec-head h2{font-size:24px;padding-left:14px}
  .sec-head p{font-size:14.5px}
  .hero h1{font-size:32px}
  .hero-sub{font-size:17px}
  .hero-badges li{flex:1 1 100%}
  .spec-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr;gap:18px}
  .step{padding-top:48px;padding-left:52px}
  .step::before{font-size:30px}
  .step::after{display:block;top:0;bottom:-18px;left:16px;right:auto;width:1px;height:auto}
  .step:last-child::after{display:none}
  .chan-grid{grid-template-columns:1fr}
  .rank-item{grid-template-columns:38px 1fr 64px 46px;gap:10px;padding:12px 4px}
  .rank-load{display:none}
  .obj-q,.obj-a{padding:16px 18px}
  .guarantee{grid-template-columns:1fr;padding:24px}
  .lead-form{padding:22px}
  .foot-grid{grid-template-columns:1fr;gap:28px}
}

@media (max-width:520px){
  .container{padding:0 16px}
  .topbar{font-size:12px}
  .topbar .container{gap:16px}
  .hero h1{font-size:28px}
  .hero-actions .btn{width:100%}
  .scene-grid{grid-template-columns:1fr}
  .stats-band{grid-template-columns:1fr;gap:18px;text-align:left}
  .stat b{font-size:30px}
  .field-row{grid-template-columns:1fr}
  .sticky-cta p{display:none}
  .sticky-cta .btn{flex:1 1 0}
}