/* roulang page: index */
:root{
  --brand:#D8384F;
  --brand-dark:#B02A3E;
  --brand-deep:#9E2233;
  --leaf:#2F8F6B;
  --leaf-soft:#E4F2EC;
  --bg:#141110;
  --surface:#1E1A19;
  --line:#2A2523;
  --light:#F5F1EC;
  --white:#FFFFFF;
  --tx:#EDE7E3;
  --tx-dim:#A8A09B;
  --tx-dark:#1B1918;
  --tx-dark-dim:#5A524D;
  --warn:#C4562F;
  --tip:#D9A441;
  --r-card:16px;
  --r-btn:12px;
  --r-img:16px;
  --r-pill:999px;
  --sh-dark:0 10px 30px rgba(0,0,0,.35);
  --sh-light:0 6px 20px rgba(27,25,24,.08);
  --sect:96px;
  --sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"DIN Alternate","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--tx);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease,opacity .2s ease}
a:hover{color:var(--brand)}
button,input,select,textarea{font:inherit}
h1,h2,h3,h4{line-height:1.2;margin:0;font-weight:800}
h1{font-size:52px;font-weight:900;letter-spacing:-.01em}
h2{font-size:34px}
h3{font-size:22px;font-weight:700}
p{margin:0 0 16px}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.container-x{width:100%;max-width:1280px;margin:0 auto;padding:0 40px}
.section{padding:var(--sect) 0;position:relative}
.section--tight{padding:64px 0}
.section--light{background:var(--light);color:var(--tx-dark)}
.section--light h1,.section--light h2,.section--light h3{color:var(--tx-dark)}
.section--dark-alt{background:#171413}
.dotted{position:relative}
.dotted::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(216,56,79,.55) 1px,transparent 1px);
  background-size:22px 22px;opacity:.06;pointer-events:none;
}
.section-head{max-width:820px;margin-bottom:44px}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.06em;font-weight:700;
  color:var(--brand);text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--brand);display:inline-block}
.section--light .eyebrow{color:var(--brand-deep)}
.section--light .eyebrow::before{background:var(--brand-deep)}
.sec-lead{color:var(--tx-dim);font-size:16px;max-width:760px}
.section--light .sec-lead{color:var(--tx-dark-dim)}

/* ============ 按钮体系 ============ */
.btn-brand,.btn-ghost,.btn-ghost-dark{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:48px;padding:0 26px;border-radius:var(--r-btn);
  font-weight:700;font-size:15px;cursor:pointer;
  transition:background .2s ease-out,color .2s ease-out,border-color .2s ease-out,transform .2s ease-out;
}
.btn-brand{background:var(--brand);color:#fff;border:1px solid var(--brand)}
.btn-brand:hover{background:var(--brand-dark);border-color:var(--brand-dark);color:#fff;transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--tx);border:1px solid var(--tx-dim)}
.btn-ghost:hover{border-color:var(--brand);color:#fff;transform:translateY(-2px)}
.btn-ghost-dark{background:transparent;color:var(--tx-dark);border:1px solid rgba(27,25,24,.28)}
.btn-ghost-dark:hover{border-color:var(--brand-deep);color:var(--brand-deep);transform:translateY(-2px)}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:700;color:var(--brand);
}
.btn-text .arrow{transition:transform .2s ease-out}
.btn-text:hover .arrow{transform:translateX(4px)}
.section--light .btn-text{color:var(--brand-deep)}

/* ============ 导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1030;
  height:72px;background:rgba(20,17,16,.72);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,backdrop-filter .25s ease;
}
.site-header.is-scrolled{
  background:rgba(20,17,16,.92);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.site-nav{height:72px;display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand__mark{
  width:36px;height:36px;border-radius:11px;
  background:linear-gradient(150deg,var(--brand),var(--brand-deep));
  display:grid;place-items:center;color:#fff;font-weight:900;font-size:17px;
  font-family:var(--mono);
}
.brand__name{font-size:18px;font-weight:900;letter-spacing:.01em;color:#fff}
.brand__name span{color:var(--brand)}
.nav-list{display:flex;align-items:center;gap:4px;margin-left:12px;flex:1}
.nav-list a{
  padding:10px 14px;border-radius:10px;font-size:15px;font-weight:600;color:var(--tx-dim);
}
.nav-list a:hover{color:#fff;background:rgba(255,255,255,.04)}
.nav-list a.is-active{color:#fff}
.nav-list a.is-active::after{
  content:"";display:block;height:2px;width:18px;margin:6px auto 0;
  background:var(--brand);border-radius:2px;
}
.nav-tools{display:flex;align-items:center;gap:12px;flex-shrink:0}
.lang-pill{
  display:inline-flex;align-items:center;gap:8px;height:36px;padding:6px 14px;
  border:1px solid var(--line);border-radius:var(--r-pill);background:transparent;
  color:var(--tx-dim);font-size:13px;font-weight:600;cursor:pointer;
  transition:border-color .2s ease,color .2s ease;
}
.lang-pill:hover{border-color:var(--brand);color:#fff}
.lang-pill .dot{width:6px;height:6px;border-radius:50%;background:var(--leaf)}
.dropdown-menu.lang-menu{
  background:var(--surface);border:1px solid var(--line);border-radius:12px;
  padding:8px;min-width:170px;box-shadow:var(--sh-dark);
}
.dropdown-menu.lang-menu .dropdown-item{
  color:var(--tx-dim);border-radius:8px;font-size:14px;padding:8px 12px;
}
.dropdown-menu.lang-menu .dropdown-item:hover{background:rgba(216,56,79,.12);color:#fff}
.nav-cta{height:40px;padding:0 18px;font-size:14px;border-radius:10px}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:10px;
  background:transparent;color:#fff;align-items:center;justify-content:center;font-size:18px;
}
.offcanvas.site-drawer{background:#12100F;color:var(--tx);width:320px;border-left:1px solid var(--line)}
.site-drawer .offcanvas-header{border-bottom:1px solid var(--line);padding:20px 22px}
.site-drawer .offcanvas-body{padding:22px;display:flex;flex-direction:column}
.drawer-list a{
  display:block;padding:14px 4px;font-size:16px;font-weight:600;color:var(--tx-dim);
  border-bottom:1px solid var(--line);
}
.drawer-list a:hover,.drawer-list a.is-active{color:#fff}
.drawer-foot{margin-top:auto;padding-top:24px;display:grid;gap:12px}

/* ============ Hero ============ */
.hero{position:relative;min-height:78vh;display:flex;align-items:flex-end;padding:140px 0 64px;overflow:hidden}
.hero__bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 30%}
.hero__scrim{
  position:absolute;inset:0;
  background:
    radial-gradient(900px 420px at 78% 18%,rgba(216,56,79,.22),transparent 62%),
    linear-gradient(90deg,rgba(14,12,11,.94) 0%,rgba(14,12,11,.78) 46%,rgba(14,12,11,.42) 100%);
}
.hero__inner{
  position:relative;z-index:2;display:flex;align-items:flex-end;
  justify-content:space-between;gap:40px;width:100%;
}
.hero__copy{width:60%;max-width:720px}
.hero__copy h1{margin:6px 0 18px;text-shadow:0 6px 24px rgba(0,0,0,.45)}
.hero__lead{font-size:17px;color:#D8D1CC;max-width:600px}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin:28px 0 18px}
.hero__note{font-size:13px;color:var(--tx-dim);letter-spacing:.01em}
.hero__badge{flex-shrink:0;padding-bottom:6px}
.ring{
  width:150px;height:150px;border-radius:50%;
  border:2px solid rgba(216,56,79,.75);
  display:grid;place-content:center;text-align:center;
  background:rgba(20,17,16,.62);
}
.ring__num{font-family:var(--mono);font-size:38px;font-weight:700;color:#fff;line-height:1}
.ring__sub{display:block;font-size:12px;color:var(--tx-dim);margin-top:6px;letter-spacing:.06em}

/* ============ 卡片通用 ============ */
.c-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;height:100%;
  transition:transform .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
}
.c-card:hover{transform:translateY(-4px);border-color:rgba(216,56,79,.45);box-shadow:var(--sh-dark)}
.c-card--accent{border-top:2px solid var(--brand)}
.section--light .c-card{background:var(--white);border-color:rgba(27,25,24,.10);box-shadow:var(--sh-light);color:var(--tx-dark)}
.section--light .c-card:hover{border-color:rgba(158,34,51,.35)}
.c-card h3{margin:14px 0 10px;font-size:19px}
.c-card p{font-size:14.5px;color:var(--tx-dim);line-height:1.7}
.section--light .c-card p{color:var(--tx-dark-dim)}
.card-ico{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  border:1px solid var(--line);color:var(--brand);font-family:var(--mono);font-weight:700;font-size:15px;
}
.section--light .card-ico{border-color:rgba(27,25,24,.12)}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:700;padding:4px 10px;border-radius:var(--r-pill);
  background:rgba(47,143,107,.14);color:#5FC79B;letter-spacing:.02em;
}
.section--light .tag{background:var(--leaf-soft);color:#1E6B4E}
.tag--brand{background:rgba(216,56,79,.14);color:#F08396}
.section--light .tag--brand{background:rgba(158,34,51,.10);color:var(--brand-deep)}
.tag--tip{background:rgba(217,164,65,.14);color:#E5BC6B}

/* ============ 版本资源矩阵 ============ */
.matrix{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.matrix__wide{grid-column:span 2;display:grid;grid-template-columns:1.05fr .95fr;gap:0;padding:0;overflow:hidden}
.matrix__wide .wide-media{position:relative;min-height:230px}
.matrix__wide .wide-media img{width:100%;height:100%;object-fit:cover}
.matrix__wide .wide-body{padding:26px}
.matrix__wide h3{font-size:21px}

/* ============ 平台适配条 ============ */
.scroll-x{display:flex;gap:16px;overflow-x:auto;padding:4px 0 12px;scrollbar-width:thin}
.scroll-x::-webkit-scrollbar{height:6px}
.scroll-x::-webkit-scrollbar-thumb{background:var(--line);border-radius:6px}
.plat-card{
  min-width:210px;flex:1 0 210px;background:var(--surface);border:1px solid var(--line);
  border-radius:14px;padding:18px 20px;
}
.plat-card strong{display:block;font-size:15px;color:#fff;margin-bottom:6px}
.plat-card span{font-size:13px;color:var(--tx-dim);font-family:var(--mono)}

/* ============ 数据面板 ============ */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat{padding:8px 4px 4px;border-top:1px solid rgba(27,25,24,.12)}
.stat__num{font-family:var(--mono);font-size:46px;font-weight:700;color:var(--brand-deep);line-height:1.1}
.stat__label{font-size:15px;font-weight:700;color:var(--tx-dark);margin-top:8px}
.stat__desc{font-size:13.5px;color:var(--tx-dark-dim)}

/* ============ 流程 ============ */
.flow-wrap{display:grid;grid-template-columns:340px 1fr;gap:56px;align-items:start}
.flow-side{position:sticky;top:104px}
.steps{display:grid;gap:20px}
.step{
  display:grid;grid-template-columns:64px 1fr;gap:20px;align-items:start;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:24px;
}
.step__no{font-family:var(--mono);font-size:28px;font-weight:700;color:var(--brand);line-height:1}
.step h3{margin-bottom:8px;font-size:19px}
.step p{font-size:14.5px;color:var(--tx-dim)}

/* ============ 对比表 ============ */
.table-shell{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-card);background:var(--surface)}
table.cmp{width:100%;min-width:760px;border-collapse:collapse;font-size:14.5px}
table.cmp th,table.cmp td{padding:16px 20px;text-align:left;border-bottom:1px solid var(--line)}
table.cmp thead th{
  background:#191615;color:#fff;font-size:15px;font-weight:800;white-space:nowrap;
}
table.cmp thead th:first-child{color:var(--tx-dim);font-weight:600}
table.cmp tbody th{font-weight:600;color:var(--tx-dim)}
table.cmp td{color:var(--tx)}
table.cmp td .num{font-family:var(--mono)}
table.cmp tr:last-child th,table.cmp tr:last-child td{border-bottom:0}
table.cmp .diff{color:#F08396;font-weight:700}

/* ============ 案例墙 ============ */
.masonry{column-count:2;column-gap:24px}
.masonry .c-card{display:inline-block;width:100%;margin-bottom:24px;break-inside:avoid;padding:0;overflow:hidden}
.masonry .c-card img{width:100%;object-fit:cover;transition:filter .25s ease,opacity .25s ease}
.masonry .c-card:hover img{filter:brightness(1.1)}
.case-body{padding:22px 24px 24px}
.case-body h3{font-size:18px;margin:12px 0 8px}
.case-body p{font-size:14px;color:var(--tx-dim)}

/* ============ 评分与评价 ============ */
.review-wrap{display:grid;grid-template-columns:300px 1fr;gap:40px;align-items:start}
.review-score{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:32px;text-align:center;
}
.review-score .ring{margin:0 auto 18px;width:160px;height:160px}
.review-score p{font-size:13.5px;color:var(--tx-dim)}
.review-list{display:grid;gap:18px}
.review{display:grid;grid-template-columns:56px 1fr;gap:18px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:22px}
.avatar{width:56px;height:56px;border-radius:50%;background:#2A2523;display:grid;place-items:center;color:var(--tx-dim);font-weight:700}
.review__meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:6px}
.review__meta strong{font-size:15px;color:#fff}
.stars{color:var(--brand);font-family:var(--mono);font-size:13px;letter-spacing:.14em}
.review p{font-size:14.5px;color:var(--tx-dim)}

/* ============ 资讯 ============ */
.news-grid{display:grid;grid-template-columns:2fr 1fr;gap:40px;align-items:start}
.news-list{display:grid;gap:20px}
.news-item{display:grid;grid-template-columns:220px 1fr;gap:20px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;transition:border-color .2s ease,transform .2s ease-out}
.news-item:hover{border-color:rgba(216,56,79,.45);transform:translateY(-4px)}
.news-item .thumb{aspect-ratio:16/9;overflow:hidden}
.news-item .thumb img{width:100%;height:100%;object-fit:cover}
.news-item .txt{padding:18px 22px 18px 0}
.news-item h3{font-size:17px;margin-bottom:8px}
.news-item p{font-size:14px;color:var(--tx-dim)}
.news-meta{font-size:12.5px;color:var(--tx-dim);font-family:var(--mono);margin-top:10px}
.side-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:24px}
.side-panel h3{font-size:17px;margin-bottom:16px}
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px}
.mini-item{display:grid;grid-template-columns:64px 1fr;gap:14px;padding:12px 0;border-top:1px solid var(--line)}
.mini-item:first-of-type{border-top:0}
.mini-item .mini-thumb{aspect-ratio:1/1;border-radius:10px;overflow:hidden}
.mini-item .mini-thumb img{width:100%;height:100%;object-fit:cover}
.mini-item strong{font-size:14px;color:var(--tx);font-weight:600;display:block}
.mini-item span{font-size:12.5px;color:var(--tx-dim);font-family:var(--mono)}

/* ============ 更新时间线 ============ */
.log{max-width:860px;margin:0 auto;border-left:1px solid var(--line);padding-left:28px}
.log-item{position:relative;padding:0 0 26px}
.log-item::before{content:"";position:absolute;left:-34px;top:8px;width:11px;height:11px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 4px rgba(216,56,79,.16)}
.log-item time{font-family:var(--mono);font-size:13px;color:var(--tx-dim)}
.log-item strong{display:block;font-size:15.5px;color:#fff;margin:4px 0 4px;font-weight:700}
.log-item p{font-size:14px;color:var(--tx-dim)}
.log-more{margin-top:8px}

/* ============ 合作渠道 ============ */
.logo-wall{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.logo-chip{
  border:1px solid var(--line);border-radius:14px;padding:22px;text-align:center;
  color:var(--tx-dim);font-weight:700;font-size:15px;filter:grayscale(1);
  transition:filter .25s ease,color .25s ease,border-color .25s ease;
}
.logo-chip:hover{filter:grayscale(0);color:#fff;border-color:rgba(216,56,79,.45)}
.logo-chip .sub{display:block;font-size:12px;color:var(--tx-dim);font-weight:500;margin-top:4px;font-family:var(--mono)}

/* ============ FAQ ============ */
.faq-acc .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line)}
.faq-acc .accordion-button{
  position:relative;background:transparent;color:var(--tx);font-weight:700;font-size:16.5px;
  padding:22px 44px 22px 22px;box-shadow:none;border-radius:0!important;
}
.faq-acc .accordion-button::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;background:transparent;border-radius:3px;
}
.faq-acc .accordion-button:not(.collapsed){color:#fff;background:transparent}
.faq-acc .accordion-button:not(.collapsed)::before{background:var(--brand)}
.faq-acc .accordion-button::after{
  content:"+";background-image:none!important;font-family:var(--mono);font-size:22px;line-height:1;
  color:var(--brand);width:auto;height:auto;position:absolute;right:18px;top:50%;transform:translateY(-50%);
}
.faq-acc .accordion-button:not(.collapsed)::after{content:"–"}
.faq-acc .accordion-body{color:var(--tx-dim);font-size:14.5px;padding:0 44px 24px 22px}

/* ============ 保障条 ============ */
.guarantee{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.g-item{border-top:1px solid rgba(27,25,24,.14);padding-top:18px}
.g-item strong{display:block;font-size:16px;color:var(--tx-dark);margin:10px 0 6px}
.g-item p{font-size:13.5px;color:var(--tx-dark-dim)}
.g-ico{font-family:var(--mono);font-size:13px;font-weight:700;color:var(--brand-deep);letter-spacing:.06em}

/* ============ 联系表单 ============ */
.cta-panel{
  background:#191615;border:1px solid var(--line);border-radius:24px;padding:48px;
  display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:start;
}
.form-field{margin-bottom:18px}
.form-field label{display:block;font-size:14px;color:var(--tx-dim);margin-bottom:8px}
.form-field .req{color:var(--brand);margin-left:4px}
.form-control-x{
  width:100%;height:48px;border-radius:var(--r-btn);background:var(--surface);
  border:1px solid var(--line);color:var(--tx);padding:0 16px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
textarea.form-control-x{height:auto;padding:14px 16px;resize:vertical;min-height:120px;line-height:1.7}
.form-control-x::placeholder{color:#6E6660}
.form-control-x:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 2px rgba(216,56,79,.35)}
.form-control-x.is-error{border-color:var(--warn)}
.err-msg{display:none;font-size:12.5px;color:#E38A63;margin-top:6px}
.form-control-x.is-error + .err-msg{display:block}
.form-note{font-size:12.5px;color:var(--tx-dim);margin-top:14px}

/* ============ 页脚 ============ */
.site-footer{background:#0F0D0C;border-top:1px solid var(--line);padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
.footer-grid h4{font-size:14px;color:#fff;letter-spacing:.04em;margin-bottom:16px}
.footer-grid a,.footer-grid p{font-size:14px;color:var(--tx-dim);display:block;margin-bottom:10px}
.footer-grid a:hover{color:var(--brand)}
.footer-brand p{max-width:300px;font-size:13.5px;line-height:1.7}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom span,.footer-bottom a{font-size:13px;color:var(--tx-dim)}

/* ============ 响应式 ============ */
@media (max-width:1399px){
  .container-x{max-width:1200px}
}
@media (max-width:1199px){
  h1{font-size:44px}
  h2{font-size:30px}
  .section{padding:72px 0}
  .container-x{padding:0 24px}
  .matrix{grid-template-columns:repeat(2,1fr)}
  .matrix__wide{grid-column:span 2}
  .stats{grid-template-columns:repeat(2,1fr)}
  .guarantee{grid-template-columns:repeat(2,1fr)}
  .logo-wall{grid-template-columns:repeat(3,1fr)}
  .flow-wrap{grid-template-columns:1fr;gap:32px}
  .flow-side{position:static}
  .review-wrap{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .cta-panel{grid-template-columns:1fr;padding:36px;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:991px){
  .nav-list,.nav-tools{display:none}
  .nav-toggle{display:inline-flex}
  .hero__copy{width:100%}
  .hero{padding:120px 0 48px;min-height:70vh}
  .hero__scrim{background:linear-gradient(180deg,rgba(14,12,11,.86),rgba(14,12,11,.92))}
  .hero__inner{flex-direction:column;align-items:flex-start;gap:28px}
  .hero__badge{padding-bottom:0}
  .masonry{column-count:1}
}
@media (max-width:767px){
  h1{font-size:32px}
  h2{font-size:25px}
  h3{font-size:19px}
  .section{padding:56px 0}
  .container-x{padding:0 16px}
  .hero{min-height:60vh;padding:110px 0 44px}
  .hero__lead{font-size:15.5px}
  .hero__actions{gap:10px;width:100%}
  .hero__actions .btn-brand,.hero__actions .btn-ghost{width:100%}
  .matrix{grid-template-columns:1fr}
  .matrix__wide{grid-column:span 1;grid-template-columns:1fr}
  .stats,.guarantee,.logo-wall{grid-template-columns:1fr}
  .news-item{grid-template-columns:1fr}
  .news-item .txt{padding:16px 18px 20px}
  .step{grid-template-columns:1fr;gap:12px}
  .review{grid-template-columns:1fr}
  .cta-panel{padding:24px;border-radius:18px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:575px){
  .stat__num{font-size:38px}
  .ring{width:132px;height:132px}
  .ring__num{font-size:32px}
}

/* roulang page: category1 */
:root{
 --brand:#D8384F;
 --brand-dark:#B02A3E;
 --brand-deep:#9E2233;
 --leaf:#2F8F6B;
 --leaf-soft:#E4F2EC;
 --bg:#141110;
 --surface:#1E1A19;
 --line:#2A2523;
 --light:#F5F1EC;
 --white:#FFFFFF;
 --tx:#EDE7E3;
 --tx-dim:#A8A09B;
 --tx-dark:#1B1918;
 --tx-dark-dim:#5A524D;
 --warn:#C4562F;
 --tip:#D9A441;
 --r-card:16px;
 --r-btn:12px;
 --r-img:16px;
 --r-pill:999px;
 --sh-dark:0 10px 30px rgba(0,0,0,.35);
 --sh-light:0 6px 20px rgba(27,25,24,.08);
 --sect:96px;
 --sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
 --mono:"DIN Alternate","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}
html{scroll-behavior:smooth}
*,*::before,*::after{box-sizing:border-box}
body{
 margin:0;
 padding-top:72px;
 background:var(--bg);
 color:var(--tx);
 font-family:var(--sans);
 font-size:16px;
 line-height:1.75;
 -webkit-font-smoothing:antialiased;
 overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease,opacity .2s ease}
a:hover{color:var(--brand)}
button,input,select,textarea{font:inherit}
ul,ol{list-style:none;margin:0;padding:0}
h1,h2,h3,h4{margin:0;line-height:1.2;font-weight:800;letter-spacing:0}
p{margin:0 0 16px}
.container-x{width:100%;max-width:1280px;margin:0 auto;padding:0 40px}
.section{padding:var(--sect) 0;position:relative}
.section--tight{padding:64px 0}
.section--light{background:var(--light);color:var(--tx-dark)}
.section--light h2,.section--light h3{color:var(--tx-dark)}
.section--alt{background:#171413}
.section-head{max-width:820px;margin-bottom:44px}
.sec-title{font-size:34px;font-weight:800}
.section--light .sec-title{color:var(--tx-dark)}
.sec-lead{color:var(--tx-dim);font-size:16px;max-width:760px;margin-top:12px}
.section--light .sec-lead{color:var(--tx-dark-dim)}
.eyebrow{
 display:inline-flex;align-items:center;gap:8px;
 font-size:12px;letter-spacing:.06em;font-weight:700;
 color:var(--brand);text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--brand);display:inline-block}
.section--light .eyebrow{color:var(--brand-deep)}
.section--light .eyebrow::before{background:var(--brand-deep)}
.grain{
 position:absolute;inset:0;pointer-events:none;opacity:.05;
 background-image:radial-gradient(rgba(216,56,79,.9) 1px,transparent 1px);
 background-size:14px 14px;
}
/* ============ 按钮体系 ============ */
.btn-brand,.btn-ghost,.btn-ghost-dark{
 display:inline-flex;align-items:center;justify-content:center;gap:10px;
 height:48px;padding:0 26px;border-radius:var(--r-btn);
 font-weight:700;font-size:15px;cursor:pointer;
 transition:background .2s ease-out,color .2s ease-out,border-color .2s ease-out,transform .2s ease-out;
}
.btn-brand{background:var(--brand);color:#fff;border:1px solid var(--brand)}
.btn-brand:hover,.btn-brand:focus{background:var(--brand-dark);border-color:var(--brand-dark);color:#fff;transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--tx);border:1px solid var(--tx-dim)}
.btn-ghost:hover{border-color:var(--brand);color:#fff;transform:translateY(-2px)}
.btn-ghost-dark{background:transparent;color:var(--tx-dark);border:1px solid rgba(27,25,24,.28)}
.btn-ghost-dark:hover{border-color:var(--brand-deep);color:var(--brand-deep);transform:translateY(-2px)}
.btn-brand:focus-visible,.btn-ghost:focus-visible,.btn-ghost-dark:focus-visible,.nav-list a:focus-visible,.lang-pill:focus-visible{
 outline:2px solid var(--brand);outline-offset:2px;
}
.btn-text{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;color:var(--brand)}
.btn-text .arrow{transition:transform .2s ease-out}
.btn-text:hover .arrow{transform:translateX(4px)}
.section--light .btn-text,.section--light .link-inline{color:var(--brand-deep)}
.link-inline{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.link-inline:hover{text-decoration:underline;text-decoration-thickness:2px;color:var(--brand-dark)}
/* ============ 导航 ============ */
.site-header{
 position:fixed;top:0;left:0;right:0;z-index:1030;
 height:72px;background:rgba(20,17,16,.72);
 border-bottom:1px solid transparent;
 transition:background .25s ease,border-color .25s ease,backdrop-filter .25s ease;
}
.site-header.is-scrolled{
 background:rgba(20,17,16,.92);
 backdrop-filter:blur(8px);
 -webkit-backdrop-filter:blur(8px);
 border-bottom:1px solid var(--line);
}
.site-nav{height:72px;display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand__mark{
 width:36px;height:36px;border-radius:11px;
 background:linear-gradient(150deg,var(--brand),var(--brand-deep));
 display:grid;place-items:center;color:#fff;font-weight:900;font-size:17px;
 font-family:var(--mono);
}
.brand__name{font-size:18px;font-weight:900;letter-spacing:.01em;color:#fff}
.brand__name span{color:var(--brand)}
.nav-list{display:flex;align-items:center;gap:4px;margin-left:12px;flex:1}
.nav-list a{padding:10px 14px;border-radius:10px;font-size:15px;font-weight:600;color:var(--tx-dim)}
.nav-list a:hover{color:#fff;background:rgba(255,255,255,.04)}
.nav-list a.is-active{color:#fff}
.nav-list a.is-active::after{
 content:"";display:block;height:2px;width:18px;margin:6px auto 0;
 background:var(--brand);border-radius:2px;
}
.nav-tools{display:flex;align-items:center;gap:12px;flex-shrink:0}
.lang-pill{
 display:inline-flex;align-items:center;gap:8px;height:36px;padding:6px 14px;
 border:1px solid var(--line);border-radius:var(--r-pill);background:transparent;
 color:var(--tx-dim);font-size:13px;font-weight:600;cursor:pointer;
 transition:border-color .2s ease,color .2s ease;
}
.lang-pill:hover{border-color:var(--brand);color:#fff}
.lang-pill .dot{width:6px;height:6px;border-radius:50%;background:var(--leaf)}
.dropdown-menu{
 background:var(--surface);border:1px solid var(--line);border-radius:12px;
 padding:8px;min-width:170px;box-shadow:var(--sh-dark);
}
.dropdown-menu .dropdown-item{color:var(--tx-dim);border-radius:8px;font-size:14px;padding:8px 12px}
.dropdown-menu .dropdown-item:hover{background:rgba(216,56,79,.14);color:#fff}
.nav-cta{height:40px;padding:0 18px;font-size:14px;border-radius:10px}
.nav-toggle{
 display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:10px;
 background:transparent;color:#fff;align-items:center;justify-content:center;font-size:18px;
}
.offcanvas.site-drawer{background:#12100F;color:var(--tx);width:320px;border-left:1px solid var(--line)}
.site-drawer .offcanvas-header{border-bottom:1px solid var(--line);padding:20px 22px}
.site-drawer .offcanvas-body{padding:22px;display:flex;flex-direction:column}
.drawer-list a{display:block;padding:14px 4px;font-size:16px;font-weight:600;color:var(--tx-dim);border-bottom:1px solid var(--line)}
.drawer-list a:hover,.drawer-list a.is-active{color:#fff}
.drawer-foot{margin-top:auto;padding-top:24px;display:grid;gap:12px}
/* ============ 分类页窄幅信息条 ============ */
.cat-hero{
 position:relative;min-height:220px;display:flex;align-items:center;
 background-image:linear-gradient(rgba(20,17,16,.82),rgba(20,17,16,.82)),url("/assets/images/backpic/back-2.jpg");
 background-size:cover;background-position:center;
 border-bottom:1px solid var(--line);
}
.cat-hero__inner{
 display:grid;grid-template-columns:minmax(0,1fr) auto;gap:40px;align-items:end;
 padding:36px 0;
}
.cat-hero h1{font-size:42px;font-weight:900;max-width:760px}
.cat-hero h1 em{font-style:normal;color:var(--brand)}
.cat-hero__lead{color:var(--tx-dim);font-size:16px;margin:14px 0 0;max-width:620px}
.cat-stats{display:flex;gap:32px;flex-wrap:wrap}
.cat-stats li{min-width:96px}
.cat-stats .num{display:block;font-family:var(--mono);font-size:26px;font-weight:700;color:#fff}
.cat-stats .lbl{display:block;font-size:13px;color:var(--tx-dim);margin-top:2px}
.crumbs{font-size:13px;color:var(--tx-dim);margin-bottom:16px;display:flex;align-items:center;gap:8px}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{color:var(--line)}
.crumbs .now{color:var(--tx-dim)}
/* ============ 筛选条 ============ */
.filter-bar{
 position:sticky;top:72px;z-index:1010;
 background:rgba(23,20,19,.96);
 backdrop-filter:blur(8px);
 -webkit-backdrop-filter:blur(8px);
 border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.filter-bar__inner{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:14px 0;flex-wrap:wrap}
.chip-group{display:flex;gap:8px;flex-wrap:wrap}
.chip{
 display:inline-flex;align-items:center;gap:6px;
 padding:8px 16px;border-radius:var(--r-pill);
 border:1px solid var(--line);background:transparent;color:var(--tx-dim);
 font-size:14px;font-weight:600;cursor:pointer;
 transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.chip:hover{border-color:var(--brand);color:#fff}
.chip.is-on{background:rgba(216,56,79,.16);border-color:rgba(216,56,79,.5);color:#fff}
.sort-group{display:flex;align-items:center;gap:10px}
.sort-group label{font-size:13px;color:var(--tx-dim)}
.sort-select{
 height:40px;padding:0 36px 0 14px;border-radius:10px;
 background:var(--surface);border:1px solid var(--line);color:var(--tx);
 font-size:14px;appearance:none;
 background-image:linear-gradient(45deg,transparent 50%,var(--tx-dim) 50%),linear-gradient(135deg,var(--tx-dim) 50%,transparent 50%);
 background-position:calc(100% - 18px) 17px,calc(100% - 13px) 17px;
 background-size:5px 5px,5px 5px;background-repeat:no-repeat;
}
.sort-select:focus{outline:2px solid var(--brand);outline-offset:2px}
.filter-drawer-btn{display:none}
/* ============ 分类卡片 ============ */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.c-card{
 display:flex;flex-direction:column;height:100%;
 background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
 overflow:hidden;position:relative;
 box-shadow:var(--sh-dark);
 transition:transform .2s ease-out,border-color .2s ease-out;
}
.c-card::before{
 content:"";position:absolute;left:0;right:0;top:0;height:2px;background:var(--brand);opacity:0;
 transition:opacity .2s ease-out;
}
.c-card:hover{transform:translateY(-4px);border-color:rgba(216,56,79,.45)}
.c-card:hover::before{opacity:1}
.c-card__media{position:relative;aspect-ratio:4/3;overflow:hidden;background:#0F0D0C}
.c-card__media img{width:100%;height:100%;object-fit:cover;transition:filter .25s ease-out}
.c-card:hover .c-card__media img{filter:brightness(1.08)}
.c-card__body{padding:20px 20px 22px;display:flex;flex-direction:column;flex:1}
.c-card__title{font-size:18px;font-weight:700;line-height:1.45}
.c-card__title a:hover{color:var(--brand)}
.c-card__desc{color:var(--tx-dim);font-size:14px;margin:10px 0 16px}
.tag-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
.tag{font-size:12px;padding:4px 10px;border-radius:var(--r-pill);background:var(--leaf-soft);color:var(--leaf);font-weight:600}
.section--light .tag{background:var(--leaf-soft);color:var(--leaf)}
.c-card__foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--tx-dim)}
.c-card__foot .meta{font-family:var(--mono)}
.list-more{display:flex;justify-content:center;margin-top:44px}
/* ============ 关键词解读长文 ============ */
.read-grid{display:grid;grid-template-columns:280px minmax(0,1fr);gap:48px}
.read-side h2{font-size:30px;font-weight:800}
.read-side p{color:var(--tx-dark-dim);font-size:14px;margin-top:14px}
.read-body{columns:2;column-gap:40px}
.read-body h3{font-size:20px;font-weight:700;margin:0 0 10px;break-inside:avoid}
.read-body p{color:var(--tx-dark-dim);font-size:15px;break-inside:avoid}
.read-block{margin-bottom:26px;break-inside:avoid}
/* ============ 参数速览表 ============ */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-card);background:var(--surface)}
table.spec{width:100%;min-width:760px;border-collapse:collapse}
table.spec caption{text-align:left;padding:18px 20px;color:var(--tx-dim);font-size:14px;border-bottom:1px solid var(--line)}
table.spec th,table.spec td{padding:16px 20px;border-bottom:1px solid var(--line);text-align:left;font-size:15px}
table.spec thead th{font-size:13px;letter-spacing:.06em;color:var(--tx-dim);font-weight:700;text-transform:uppercase;background:#191615}
table.spec tbody th{font-weight:600;color:var(--tx)}
table.spec td{color:var(--tx-dim);font-family:var(--mono);font-size:14px}
table.spec td.hi{color:var(--brand);font-weight:700}
table.spec tbody tr:last-child th,table.spec tbody tr:last-child td{border-bottom:0}
table.spec tbody tr:hover{background:rgba(216,56,79,.05)}
/* ============ FAQ ============ */
.acc{border-top:1px solid var(--line)}
.acc-item{border-bottom:1px solid var(--line)}
.acc-btn{
 width:100%;text-align:left;padding:22px 52px 22px 18px;background:transparent;border:0;
 color:var(--tx);font-size:17px;font-weight:700;cursor:pointer;position:relative;
 transition:box-shadow .2s ease,color .2s ease;
}
.acc-btn::after{
 content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);
 color:var(--brand);font-size:20px;font-family:var(--mono);line-height:1;
}
.acc-btn[aria-expanded="true"]::after{content:"−"}
.acc-btn[aria-expanded="true"]{box-shadow:inset 3px 0 0 var(--brand);color:#fff}
.acc-btn:hover{color:#fff}
.acc-body{padding:0 52px 24px 18px;color:var(--tx-dim);font-size:15px}
.acc-body p:last-child{margin-bottom:0}
/* ============ 推荐阅读 ============ */
.read-cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
.mini-card{
 display:flex;flex-direction:column;height:100%;
 background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
 overflow:hidden;transition:transform .2s ease-out,border-color .2s ease-out;
}
.mini-card:hover{transform:translateY(-4px);border-color:rgba(216,56,79,.45)}
.mini-card__media{aspect-ratio:16/9;overflow:hidden;background:#0F0D0C}
.mini-card__media img{width:100%;height:100%;object-fit:cover}
.mini-card__body{padding:16px 18px 20px}
.mini-card__body h3{font-size:16px;font-weight:700;line-height:1.5}
.mini-card__body span{display:block;margin-top:10px;font-size:13px;color:var(--tx-dim);font-family:var(--mono)}
/* ============ 保障 / CTA 条 ============ */
.guard{
 display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;
 padding:32px;border-radius:var(--r-card);
 background:var(--surface);border:1px solid var(--line);
}
.guard-item{display:flex;gap:14px;align-items:flex-start}
.guard-item .ic{
 width:40px;height:40px;flex-shrink:0;border-radius:12px;display:grid;place-items:center;
 background:rgba(216,56,79,.14);color:var(--brand);font-family:var(--mono);font-weight:700;
}
.guard-item h3{font-size:16px;font-weight:700}
.guard-item p{color:var(--tx-dim);font-size:14px;margin:6px 0 0}
.cta-band{
 margin-top:32px;border-radius:20px;padding:40px;
 background:linear-gradient(120deg,#1B1716,#241B1D 60%,#2A1A1E);
 border:1px solid var(--line);
 display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-band h2{font-size:26px;font-weight:800}
.cta-band p{color:var(--tx-dim);font-size:15px;margin:10px 0 0;max-width:640px}
/* ============ 页脚 ============ */
.site-footer{background:#0F0D0C;border-top:1px solid var(--line);padding:64px 0 28px;margin-top:var(--sect)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer-brand p{color:var(--tx-dim);font-size:14px;max-width:320px}
.site-footer h4{font-size:14px;letter-spacing:.04em;color:#fff;margin-bottom:16px;font-weight:700}
.site-footer .footer-grid a{display:block;color:var(--tx-dim);font-size:14px;padding:6px 0}
.site-footer .footer-grid a:hover{color:var(--brand)}
.footer-bottom{
 margin-top:44px;padding-top:22px;border-top:1px solid var(--line);
 display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
 color:var(--tx-dim);font-size:13px;
}
/* ============ 响应式 ============ */
@media (max-width:1400px){
 .container-x{max-width:1360px}
}
@media (max-width:1199px){
 .nav-list a{padding:10px 11px;font-size:14px}
 .cat-hero h1{font-size:36px}
 .read-grid{grid-template-columns:240px minmax(0,1fr);gap:36px}
 .read-cards{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:991px){
 .nav-list,.nav-tools .lang-pill,.nav-cta{display:none}
 .nav-toggle{display:inline-flex}
 .container-x{padding:0 24px}
 .section{padding:72px 0}
 .cat-hero__inner{grid-template-columns:1fr;gap:24px;align-items:start}
 .cat-hero h1{font-size:32px}
 .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
 .read-grid{grid-template-columns:1fr}
 .read-body{columns:1}
 .guard{grid-template-columns:1fr}
 .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
 .filter-drawer-btn{display:inline-flex}
}
@media (max-width:767px){
 .section{padding:56px 0}
 .container-x{padding:0 16px}
 .cat-hero{min-height:200px}
 .cat-hero h1{font-size:28px}
 .cat-stats{gap:20px}
 .card-grid{grid-template-columns:1fr;gap:16px}
 .read-cards{grid-template-columns:1fr}
 .sec-title{font-size:26px}
 .filter-bar{position:static}
 .cta-band{padding:28px}
 .footer-grid{grid-template-columns:1fr;gap:28px}
 .acc-btn{font-size:16px;padding:18px 44px 18px 14px}
 .acc-body{padding:0 44px 20px 14px}
}
@media (max-width:575px){
 .cat-hero h1{font-size:24px}
 .cat-stats .num{font-size:22px}
 .btn-brand,.btn-ghost,.btn-ghost-dark{width:100%}
 .cta-band{flex-direction:column;align-items:flex-start}
}

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}