/* roulang page: index */
:root{
  --brand-600:#4A2E8F;
  --brand-500:#6C4BD1;
  --brand-50:#F1EDFB;
  --accent-500:#17C3A2;
  --alert-500:#FF6A4D;
  --ink-900:#16122A;
  --ink-600:#4B4660;
  --ink-400:#6B6580;
  --line:#E6E2F2;
  --bg:#F7F6FB;
  --surface:#FFFFFF;
  --deep:#14102B;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(22,18,42,.06);
  --shadow-2:0 10px 28px -14px rgba(74,46,143,.28);
  --ease:180ms ease;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  background:var(--bg);
  color:var(--ink-600);
  font-size:16px;
  line-height:1.78;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;color:var(--ink-900);line-height:1.32;font-weight:700;letter-spacing:-.01em;}
p{margin:0 0 .9em;}
p:last-child{margin-bottom:0;}
.num{font-variant-numeric:tabular-nums;font-weight:700;}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--accent-500);outline-offset:2px;border-radius:6px;
}
::selection{background:rgba(108,75,209,.22);}
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-track{background:#EFEDF8;}
::-webkit-scrollbar-thumb{background:#C9C1E6;border-radius:999px;border:2px solid #EFEDF8;}
::-webkit-scrollbar-thumb:hover{background:#AFA3DC;}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:76px 0;scroll-margin-top:120px;}
.section-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:34px;}
.section-head h2{font-size:28px;position:relative;padding-left:16px;}
.section-head h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:4px;background:var(--brand-600);}
.section-head p{margin:10px 0 0;font-size:15px;color:var(--ink-400);max-width:640px;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--brand-600);font-weight:600;font-size:15px;white-space:nowrap;}
.link-arrow span{transition:transform var(--ease);display:inline-block;}
.link-arrow:hover span{transform:translateX(4px);}
.link-arrow:hover{color:var(--brand-500);}

/* ============ 导航 ============ */
.site-header{position:sticky;top:0;z-index:60;background:var(--surface);border-bottom:1px solid var(--line);transition:box-shadow var(--ease);}
.site-header.scrolled{box-shadow:0 6px 20px -12px rgba(22,18,42,.35);}
.topbar-inner{display:flex;align-items:center;gap:22px;height:66px;transition:height var(--ease);}
.site-header.scrolled .topbar-inner{height:56px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,var(--brand-600),var(--brand-500));display:flex;align-items:center;justify-content:center;box-shadow:0 6px 16px -10px rgba(74,46,143,.85);}
.brand-mark svg{width:20px;height:20px;stroke:#fff;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.brand-text{font-size:18px;font-weight:700;color:var(--brand-600);letter-spacing:-.2px;}
.brand-sub{display:block;font-size:11px;color:var(--ink-400);font-weight:400;letter-spacing:.08em;line-height:1;margin-top:2px;}
.search{position:relative;flex:1;max-width:400px;}
.search input{
  width:100%;height:42px;border-radius:var(--radius-pill);border:1px solid var(--line);
  background:var(--bg);padding:0 48px 0 18px;font-size:14.5px;color:var(--ink-900);
  transition:border-color var(--ease),background var(--ease),box-shadow var(--ease);
}
.search input::placeholder{color:#9A94AE;}
.search input:hover{border-color:#D5CDEF;}
.search input:focus{outline:none;border-color:var(--brand-500);background:#fff;box-shadow:0 0 0 3px rgba(23,195,162,.18);}
.search button{
  position:absolute;right:5px;top:5px;width:32px;height:32px;border-radius:50%;
  border:0;background:var(--brand-600);display:flex;align-items:center;justify-content:center;cursor:pointer;
  transition:background var(--ease),transform var(--ease);
}
.search button:hover{background:var(--brand-500);}
.search button:active{transform:scale(.94);}
.search button svg{width:15px;height:15px;stroke:#fff;fill:none;stroke-width:2.2;stroke-linecap:round;}
.hot-keys{display:flex;align-items:center;gap:8px;margin-left:auto;flex-shrink:0;}
.hot-keys .hot-label{font-size:12.5px;color:var(--ink-400);}
.hot-chip{
  display:inline-block;padding:5px 13px;border-radius:var(--radius-pill);background:var(--brand-50);
  color:var(--brand-600);font-size:12.5px;font-weight:500;transition:background var(--ease),color var(--ease);
}
.hot-chip:hover{background:var(--brand-600);color:#fff;}
.menu-btn{display:none;width:42px;height:42px;border-radius:11px;border:1px solid var(--line);background:var(--surface);cursor:pointer;align-items:center;justify-content:center;flex-shrink:0;}
.menu-btn svg{width:19px;height:19px;stroke:var(--ink-900);fill:none;stroke-width:1.9;stroke-linecap:round;}
.menu-btn:hover{background:var(--brand-50);border-color:#D5CDEF;}

.channelbar{background:var(--surface);border-top:1px solid var(--line);}
.channel-inner{display:flex;align-items:center;gap:30px;height:47px;overflow-x:auto;scrollbar-width:none;}
.channel-inner::-webkit-scrollbar{display:none;}
.channel{position:relative;font-size:15px;color:var(--ink-600);white-space:nowrap;font-weight:500;padding:14px 0;transition:color var(--ease);}
.channel::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--brand-600);border-radius:2px;transform:scaleX(0);transform-origin:left;transition:transform var(--ease);}
.channel:hover{color:var(--ink-900);}
.channel:hover::after{transform:scaleX(1);}
.channel.active{color:var(--brand-600);font-weight:600;}
.channel.active::after{transform:scaleX(1);}

.drawer-mask{position:fixed;inset:0;background:rgba(20,16,43,.55);opacity:0;visibility:hidden;transition:opacity var(--ease),visibility var(--ease);z-index:80;}
.drawer-mask.open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(84vw,340px);background:var(--surface);z-index:90;
  transform:translateX(100%);transition:transform 240ms ease;padding:22px 22px 32px;overflow-y:auto;
  border-left:1px solid var(--line);display:flex;flex-direction:column;gap:20px;
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;}
.drawer-close{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:var(--surface);font-size:20px;line-height:1;cursor:pointer;color:var(--ink-600);}
.drawer-close:hover{background:var(--brand-50);color:var(--brand-600);}
.drawer-nav{display:flex;flex-direction:column;gap:2px;border-top:1px solid var(--line);padding-top:14px;}
.drawer-nav a{padding:13px 4px;font-size:16px;border-bottom:1px solid var(--line);color:var(--ink-600);font-weight:500;}
.drawer-nav a:hover{color:var(--brand-600);}
.drawer-nav a.active{color:var(--brand-600);font-weight:700;}
.drawer-note{font-size:13px;color:var(--ink-400);line-height:1.7;}

/* ============ Hero ============ */
.hero{position:relative;background:var(--deep);color:#fff;overflow:hidden;}
.hero::before{content:"";position:absolute;inset:0;background-image:url(/assets/images/backpic/back-2.webp);background-size:cover;background-position:center;opacity:.3;}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(20,16,43,.94) 0%,rgba(74,46,143,.68) 55%,rgba(23,195,162,.24) 100%);}
.hero .wrap{position:relative;z-index:2;}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.06fr) minmax(0,.94fr);gap:56px;align-items:center;padding:78px 0 84px;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 15px;border-radius:var(--radius-pill);background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.24);font-size:13px;color:#E9E4FB;letter-spacing:.02em;}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--accent-500);display:inline-block;}
.hero h1{color:#fff;font-size:40px;line-height:1.28;margin:22px 0 18px;letter-spacing:-.4px;}
.hero-sub{font-size:17px;color:#D8D2EE;max-width:520px;margin-bottom:30px;line-height:1.8;}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:32px;}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:14px;color:#C9C2E6;}
.hero-points li{display:flex;align-items:center;gap:8px;}
.hero-points svg{width:15px;height:15px;stroke:var(--accent-500);fill:none;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0;}
.hero-visual{position:relative;border-radius:18px;overflow:hidden;border:1px solid rgba(255,255,255,.16);box-shadow:0 30px 60px -30px rgba(0,0,0,.7);}
.hero-visual img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.hero-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,16,43,0) 45%,rgba(20,16,43,.72) 100%);}
.hero-stats{position:absolute;bottom:0;left:0;right:0;z-index:3;display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:rgba(255,255,255,.14);}
.hero-stats div{padding:14px 12px;background:rgba(20,16,43,.55);text-align:center;}
.hero-stats strong{display:block;font-size:20px;color:#fff;font-variant-numeric:tabular-nums;}
.hero-stats span{font-size:12px;color:#BFB7DE;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;transition:background-color var(--ease),color var(--ease),transform var(--ease),box-shadow var(--ease),border-color var(--ease);
  text-align:center;
}
.btn-primary{background:var(--brand-600);color:#fff;}
.btn-primary:hover{background:var(--brand-500);transform:translateY(-1px);box-shadow:0 12px 24px -14px rgba(74,46,143,.85);}
.btn-primary:active{transform:translateY(0);box-shadow:none;}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.42);color:#fff;}
.btn-ghost:hover{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.7);}
.btn-outline{background:var(--surface);border-color:var(--line);color:var(--brand-600);}
.btn-outline:hover{background:var(--brand-50);border-color:#D5CDEF;}
.btn-block{width:100%;}

/* ============ 指标 ============ */
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.metric-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px 22px;transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.metric-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#DCD5F2;}
.metric-value{font-size:34px;line-height:1.1;color:var(--ink-900);font-variant-numeric:tabular-nums;font-weight:700;}
.metric-value span{font-size:15px;font-weight:600;color:var(--ink-400);margin-left:5px;}
.metric-label{margin-top:12px;font-size:14px;color:var(--ink-600);}
.metric-trend{display:inline-block;margin-top:14px;padding:3px 11px;border-radius:var(--radius-pill);font-size:12.5px;font-weight:600;}
.trend-up{background:rgba(23,195,162,.13);color:#0E8F77;}
.trend-flat{background:var(--brand-50);color:var(--brand-600);}
.trend-warn{background:rgba(255,106,77,.13);color:#D8452A;}

/* ============ 品类矩阵 ============ */
.matrix{display:grid;grid-template-columns:5fr 7fr;gap:24px;align-items:stretch;}
.matrix-feature{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
  display:flex;flex-direction:column;transition:transform var(--ease),box-shadow var(--ease);
}
.matrix-feature:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);}
.matrix-feature img{width:100%;aspect-ratio:16/10;object-fit:cover;background:var(--brand-50);}
.matrix-feature .body{padding:24px 24px 26px;flex:1;display:flex;flex-direction:column;}
.matrix-feature h3{font-size:20px;margin-bottom:10px;}
.matrix-feature p{font-size:14.5px;color:var(--ink-600);}
.matrix-feature ul{margin:16px 0 20px;display:flex;flex-direction:column;gap:9px;}
.matrix-feature ul li{position:relative;padding-left:20px;font-size:14px;color:var(--ink-600);}
.matrix-feature ul li::before{content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:2px;background:var(--accent-500);}
.matrix-feature .link-arrow{margin-top:auto;}
.matrix-side{display:flex;flex-direction:column;gap:20px;}
.matrix-row{
  display:flex;gap:18px;align-items:flex-start;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:22px 24px;transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.matrix-row:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#DCD5F2;}
.matrix-icon{
  width:46px;height:46px;flex-shrink:0;border-radius:13px;background:var(--brand-50);
  display:flex;align-items:center;justify-content:center;
}
.matrix-icon svg{width:22px;height:22px;stroke:var(--brand-600);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.matrix-row h3{font-size:17px;margin-bottom:6px;}
.matrix-row p{font-size:14px;color:var(--ink-600);margin-bottom:8px;}
.matrix-mini{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.matrix-mini .mini{
  background:var(--brand-50);border:1px solid #E3DCF8;border-radius:var(--radius-card);padding:22px;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease);
}
.matrix-mini .mini:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);background:#EAE4FA;}
.matrix-mini h3{font-size:16px;margin:14px 0 7px;}
.matrix-mini p{font-size:13.5px;color:var(--ink-600);margin-bottom:10px;}
.matrix-mini .matrix-icon{background:#fff;}

/* ============ 对比 ============ */
.compare{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.compare-col{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:28px 26px;}
.compare-col.highlight{background:var(--brand-50);border-color:#E3DCF8;}
.compare-col h3{font-size:19px;margin-bottom:6px;}
.compare-col .sub{font-size:13.5px;color:var(--ink-400);margin-bottom:22px;}
.compare-item{margin-bottom:20px;}
.compare-item:last-child{margin-bottom:0;}
.compare-top{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:8px;}
.compare-top span{font-size:14px;color:var(--ink-600);}
.compare-top strong{font-size:16px;color:var(--ink-900);font-variant-numeric:tabular-nums;font-weight:700;}
.bar{height:10px;border-radius:var(--radius-pill);background:#EAE6F6;overflow:hidden;}
.compare-col.highlight .bar{background:#E1DAF5;}
.bar i{display:block;height:100%;border-radius:var(--radius-pill);background:var(--brand-600);transition:width .5s ease;}
.bar i.accent{background:var(--accent-500);}
.compare-note{margin-top:24px;padding:16px 20px;border-radius:12px;background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--accent-500);font-size:14.5px;color:var(--ink-600);}

/* ============ 内容卡片 / CMS ============ */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#DCD5F2;}
.card:hover h3{color:var(--brand-500);}
.card-cover{position:relative;background:var(--brand-50);}
.card-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.badge{
  display:inline-block;padding:3px 11px;border-radius:var(--radius-pill);
  background:var(--brand-50);color:var(--brand-600);font-size:12px;font-weight:600;
}
.card-cover .badge{position:absolute;left:12px;top:12px;background:rgba(255,255,255,.94);}
.card-body{padding:20px 20px 22px;display:flex;flex-direction:column;flex:1;}
.card-body h3{font-size:17px;line-height:1.5;margin:12px 0 10px;transition:color var(--ease);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-body p{font-size:14px;color:var(--ink-600);margin-bottom:16px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.card-meta{margin-top:auto;font-size:13px;color:var(--ink-400);font-variant-numeric:tabular-nums;
  padding-top:14px;border-top:1px solid var(--line);display:flex;align-items:center;gap:8px;}
.card-meta i{width:3px;height:3px;border-radius:50%;background:#C9C1E6;display:inline-block;}
.empty-state{
  grid-column:1/-1;background:var(--surface);border:1px dashed #D5CDEF;border-radius:var(--radius-card);
  padding:56px 24px;text-align:center;
}
.empty-state svg{width:44px;height:44px;stroke:#B9AFDF;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;margin:0 auto 16px;}
.empty-state p{font-size:15px;color:var(--ink-400);margin-bottom:18px;}

/* ============ FAQ ============ */
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px 24px;align-items:start;}
.faq-col{display:flex;flex-direction:column;gap:16px;padding-left:18px;border-left:2px solid var(--accent-500);}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:0 22px;transition:border-color var(--ease),box-shadow var(--ease);}
.faq-item:hover{border-color:#D5CDEF;box-shadow:var(--shadow-1);}
.faq-item[open]{border-color:#D5CDEF;box-shadow:var(--shadow-1);}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 0;font-size:16px;font-weight:600;color:var(--ink-900);
  display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"+";font-size:20px;font-weight:500;color:var(--brand-600);line-height:1;transition:transform var(--ease);flex-shrink:0;margin-top:3px;}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-body{padding:0 0 20px;font-size:15px;color:var(--ink-600);line-height:1.8;}

/* ============ 表单 ============ */
.contact-wrap{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:start;}
.contact-info h2{font-size:28px;margin-bottom:14px;position:relative;padding-left:16px;}
.contact-info h2::before{content:"";position:absolute;left:0;top:7px;bottom:7px;width:4px;border-radius:4px;background:var(--brand-600);}
.contact-info > p{font-size:15px;color:var(--ink-400);margin-bottom:26px;}
.contact-list{display:flex;flex-direction:column;gap:18px;}
.contact-list li{display:flex;gap:14px;align-items:flex-start;}
.contact-list .matrix-icon{width:40px;height:40px;border-radius:11px;}
.contact-list .matrix-icon svg{width:19px;height:19px;}
.contact-list strong{display:block;font-size:15px;color:var(--ink-900);margin-bottom:3px;}
.contact-list span{font-size:14px;color:var(--ink-600);}

.form-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:32px 30px;box-shadow:var(--shadow-1);}
@media (min-width:1024px){.form-card{position:sticky;top:130px;}}
.field{margin-bottom:18px;}
.field label{display:block;font-size:14px;font-weight:600;color:var(--ink-900);margin-bottom:8px;}
.req{color:var(--alert-500);}
.field input,.field select,.field textarea{
  width:100%;height:46px;border-radius:var(--radius-btn);border:1px solid var(--line);
  background:var(--bg);padding:0 15px;font-size:14.5px;color:var(--ink-900);
  transition:border-color var(--ease),background var(--ease),box-shadow var(--ease);
}
.field textarea{height:118px;padding:12px 15px;resize:vertical;line-height:1.7;}
.field select{appearance:none;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%236B6580' stroke-width='2.2' stroke-linecap='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 16px center;padding-right:42px;}
.field input::placeholder,.field textarea::placeholder{color:#9A94AE;}
.field input:hover,.field select:hover,.field textarea:hover{border-color:#D5CDEF;}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--brand-500);background:#fff;box-shadow:0 0 0 3px rgba(74,46,143,.1);}
.privacy-note{font-size:12.5px;color:var(--ink-400);margin-top:16px;line-height:1.7;}
.form-status{margin-top:16px;padding:12px 16px;border-radius:var(--radius-btn);font-size:14px;display:none;}
.form-status.ok{display:block;background:rgba(23,195,162,.12);color:#0E8F77;border:1px solid rgba(23,195,162,.3);}
.form-status.err{display:block;background:rgba(255,106,77,.1);color:#D8452A;border:1px solid rgba(255,106,77,.3);}

/* ============ 页脚 ============ */
.site-footer{background:var(--deep);color:#B9B3D2;padding:64px 0 0;position:relative;overflow:hidden;}
.site-footer::before{content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.028) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.028) 1px,transparent 1px);
  background-size:44px 44px;pointer-events:none;}
.site-footer .wrap{position:relative;z-index:1;}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.1fr;gap:40px;padding-bottom:48px;}
.foot-brand .brand-text{color:#fff;font-size:18px;}
.foot-brand .brand-mark{margin-bottom:4px;}
.foot-brand p{font-size:14px;color:#9C95BE;margin:16px 0 20px;max-width:300px;line-height:1.8;}
.foot-contact{display:flex;flex-direction:column;gap:9px;font-size:13.5px;color:#9C95BE;}
.foot-contact li{display:flex;gap:8px;align-items:center;}
.foot-contact svg{width:14px;height:14px;stroke:var(--accent-500);fill:none;stroke-width:2;stroke-linecap:round;flex-shrink:0;}
.foot-col h4{color:#fff;font-size:15px;margin-bottom:18px;font-weight:600;}
.foot-col ul{display:flex;flex-direction:column;gap:12px;}
.foot-col a{font-size:14px;color:#B9B3D2;transition:color var(--ease),padding-left var(--ease);display:inline-block;}
.foot-col a:hover{color:var(--accent-500);padding-left:4px;}
.foot-bottom{border-top:1px solid rgba(255,255,255,.09);padding:22px 0 28px;display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;font-size:13px;color:#8A83AE;}
.foot-bottom .foot-links{display:flex;flex-wrap:wrap;gap:20px;}
.foot-bottom a:hover{color:var(--accent-500);}

/* ============ 响应式 ============ */
@media (max-width:1280px){
  .hero h1{font-size:36px;}
}
@media (max-width:1024px){
  .hot-keys{display:none;}
  .menu-btn{display:flex;}
  .channelbar{display:none;}
  .search{max-width:none;}
  .hero-grid{grid-template-columns:1fr;gap:40px;padding:56px 0 64px;}
  .hero h1{font-size:33px;}
  .hero-sub{font-size:16px;}
  .metric-grid{grid-template-columns:repeat(2,1fr);}
  .matrix{grid-template-columns:1fr;}
  .compare{grid-template-columns:1fr;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .faq-grid{grid-template-columns:1fr;}
  .faq-col{padding-left:16px;}
  .contact-wrap{grid-template-columns:1fr;gap:34px;}
  .foot-grid{grid-template-columns:repeat(2,1fr);gap:34px;}
}
@media (max-width:768px){
  body{font-size:15.5px;}
  .wrap{padding:0 18px;}
  .section{padding:52px 0;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:26px;}
  .section-head h2{font-size:22px;}
  .brand-text{font-size:16px;}
  .brand-mark{width:34px;height:34px;border-radius:10px;}
  .topbar-inner{height:58px;gap:14px;}
  .hero h1{font-size:27px;line-height:1.36;}
  .hero-grid{padding:44px 0 52px;}
  .hero-cta .btn{flex:1 1 auto;}
  .hero-points{gap:8px 18px;font-size:13.5px;}
  .metric-grid{grid-template-columns:repeat(2,1fr);gap:14px;}
  .metric-card{padding:20px 16px;}
  .metric-value{font-size:26px;}
  .metric-label{font-size:13px;}
  .matrix-mini{grid-template-columns:1fr;}
  .news-grid{grid-template-columns:1fr;}
  .form-card{padding:24px 20px;}
  .contact-info h2{font-size:22px;}
  .foot-grid{grid-template-columns:1fr;gap:30px;}
  .foot-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .hero h1{font-size:24px;}
  .hero-stats strong{font-size:17px;}
  .hero-stats span{font-size:11px;}
  .btn{padding:12px 20px;font-size:14.5px;width:100%;}
  .hero-cta .btn{width:100%;}
  .metric-grid{grid-template-columns:1fr 1fr;gap:12px;}
  .metric-value{font-size:23px;}
  .faq-item{padding:0 16px;}
  .faq-item summary{font-size:15px;}
}

/* roulang page: article */
:root{
  --brand-600:#4A2E8F;
  --brand-500:#6C4BD1;
  --brand-50:#F1EDFB;
  --accent-500:#17C3A2;
  --alert-500:#FF6A4D;
  --ink-900:#16122A;
  --ink-600:#4B4660;
  --ink-400:#6B6580;
  --line:#E6E2F2;
  --bg:#F7F6FB;
  --surface:#FFFFFF;
  --deep:#14102B;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-1:0 1px 2px rgba(22,18,42,.06);
  --shadow-2:0 10px 28px -14px rgba(74,46,143,.28);
  --wrap:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-600);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.78;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700;line-height:1.35}
p{margin:0}
table{border-collapse:collapse}
:focus-visible{outline:2px solid var(--accent-500);outline-offset:2px;border-radius:4px}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 16px}
.num{font-variant-numeric:tabular-nums}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.97);
  backdrop-filter:saturate(160%) blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 20px -12px rgba(22,18,42,.35)}
.topbar-inner{display:flex;align-items:center;gap:18px;height:64px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:36px;height:36px;border-radius:11px;
  background:linear-gradient(140deg,var(--brand-600),var(--brand-500));
  display:grid;place-items:center;
  box-shadow:var(--shadow-1);
}
.brand-mark svg{width:19px;height:19px;fill:#fff;stroke:none}
.brand-text{display:block;font-size:17px;font-weight:700;color:var(--brand-600);letter-spacing:.2px;line-height:1.25}
.brand-sub{display:block;font-size:12px;color:var(--ink-400);line-height:1.3}
.search{position:relative;flex:1 1 auto;max-width:420px;display:flex;align-items:center}
.search input{
  width:100%;height:40px;padding:0 44px 0 16px;
  border:1px solid var(--line);border-radius:999px;
  background:#fff;color:var(--ink-900);font-size:14px;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.search input::placeholder{color:#9C97AE}
.search input:focus{outline:none;border-color:var(--accent-500);box-shadow:0 0 0 3px rgba(23,195,162,.18)}
.search button{
  position:absolute;right:4px;top:4px;width:32px;height:32px;border-radius:999px;
  display:grid;place-items:center;background:var(--brand-50);transition:background .18s ease;
}
.search button:hover{background:#E5DDFA}
.search button svg{width:16px;height:16px;fill:none;stroke:var(--brand-600);stroke-width:2;stroke-linecap:round}
.hot-keys{display:flex;align-items:center;gap:8px;flex:0 0 auto}
.hot-label{font-size:12px;color:var(--ink-400)}
.hot-chip{
  font-size:12.5px;padding:5px 12px;border-radius:999px;
  background:var(--brand-50);color:var(--brand-600);border:1px solid transparent;
  transition:all .18s ease;
}
.hot-chip:hover{background:#fff;border-color:var(--brand-500);color:var(--brand-500)}
.menu-btn{display:none;width:40px;height:40px;border-radius:10px;place-items:center;border:1px solid var(--line);background:#fff}
.menu-btn svg{width:20px;height:20px;fill:none;stroke:var(--ink-900);stroke-width:2;stroke-linecap:round}
.menu-btn:hover{background:var(--brand-50)}
.channelbar{border-top:1px solid var(--line)}
.channel-inner{display:flex;align-items:center;gap:26px;height:46px}
.channel{
  position:relative;font-size:14.5px;color:var(--ink-600);
  padding:13px 0;transition:color .18s ease;
}
.channel::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--brand-600);transform:scaleX(0);transform-origin:left;
  transition:transform .2s ease;
}
.channel:hover{color:var(--ink-900)}
.channel:hover::after{transform:scaleX(.6)}
.channel.active{color:var(--brand-600);font-weight:600}
.channel.active::after{transform:scaleX(1)}
.channel-cta{
  margin-left:auto;font-size:13.5px;color:var(--brand-600);font-weight:600;
}
.channel-cta:hover{color:var(--brand-500)}

/* drawer */
.drawer-mask{position:fixed;inset:0;background:rgba(20,16,43,.5);z-index:60}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:84%;max-width:340px;z-index:61;
  background:#fff;padding:18px;transform:translateX(100%);
  transition:transform .26s ease;overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.drawer-close{width:34px;height:34px;border-radius:10px;border:1px solid var(--line);font-size:20px;line-height:1;color:var(--ink-600)}
.drawer-search{max-width:none;margin-bottom:18px}
.drawer-nav a{
  display:block;padding:13px 12px;border-radius:10px;font-size:15.5px;color:var(--ink-900);
  border-bottom:1px solid var(--line);
}
.drawer-nav a:hover{background:var(--brand-50);color:var(--brand-600)}
.drawer-note{margin-top:18px;font-size:12.5px;color:var(--ink-400);line-height:1.7}

/* ---------- common ---------- */
.crumb{font-size:13px;color:var(--ink-400);padding:22px 0 0;display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.crumb a:hover{color:var(--brand-500)}
.crumb .sep{color:#C6C1D8}
.crumb .cur{max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--ink-600)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;
  transition:all .18s ease;border:1px solid transparent;
}
.btn-primary{background:var(--brand-600);color:#fff}
.btn-primary:hover{background:var(--brand-500);transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--brand-600)}
.btn-ghost:hover{background:var(--brand-50);border-color:var(--brand-500)}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-600)}
.link-arrow span{transition:transform .18s ease}
.link-arrow:hover span{transform:translateX(3px)}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;padding:4px 11px;border-radius:999px;
  background:var(--brand-50);color:var(--brand-600);font-weight:600;
}
.section-title{font-size:24px;line-height:1.4}
.section-head{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-end;justify-content:space-between;margin-bottom:22px}
.section-head p{font-size:14px;color:var(--ink-400)}

/* ---------- article ---------- */
.article-hero{background:#fff;border-bottom:1px solid var(--line);padding-bottom:34px}
.article-head{padding-top:18px;max-width:820px}
.article-head .bar{width:64px;height:3px;border-radius:2px;background:var(--brand-600);margin:16px 0 18px}
.article-head h1{font-size:36px;line-height:1.32;letter-spacing:.2px}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:16px;font-size:13.5px;color:var(--ink-400)}
.article-meta .dot{width:3px;height:3px;border-radius:50%;background:#C6C1D8}
.article-meta .tag-cat{color:var(--brand-600);font-weight:600}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 264px;gap:40px;padding:40px 0 8px;align-items:start}
.reader{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:34px 38px;box-shadow:var(--shadow-1);
}
.reader-narrow{max-width:790px}
.article-body{font-size:16px;line-height:1.78;color:var(--ink-600)}
.article-body > * + *{margin-top:.9em}
.article-body h2{
  position:relative;margin-top:40px;padding-left:14px;
  font-size:24px;line-height:1.45;color:var(--ink-900);font-weight:700;
}
.article-body h2:first-child{margin-top:0}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:4px;border-radius:2px;background:var(--brand-600);
}
.article-body h3{margin-top:28px;font-size:19px;line-height:1.5;color:var(--ink-900);font-weight:600}
.article-body h4{margin-top:22px;font-size:17px;color:var(--ink-900);font-weight:600}
.article-body p + p{margin-top:.9em}
.article-body ul,.article-body ol{padding-left:1.3em}
.article-body ul li{list-style:disc;margin-top:8px}
.article-body ol li{list-style:decimal;margin-top:8px}
.article-body blockquote{
  margin:22px 0;padding:14px 20px;border-left:3px solid var(--accent-500);
  background:var(--brand-50);border-radius:0 10px 10px 0;color:var(--ink-600);
}
.article-body img{border-radius:var(--radius-img);margin:22px auto}
.article-body figure{margin:22px 0}
.article-body figcaption{font-size:13px;color:var(--ink-400);text-align:center;margin-top:10px}
.article-body table{width:100%;font-size:15px;margin:22px 0;overflow:hidden;border-radius:10px}
.article-body th,.article-body td{border:1px solid var(--line);padding:11px 13px;text-align:left}
.article-body th{background:var(--brand-50);color:var(--ink-900);font-weight:600}
.article-body a{color:var(--brand-500);border-bottom:1px solid rgba(108,75,209,.35)}
.article-body a:hover{color:var(--brand-600);border-bottom-color:var(--brand-600)}
.article-body code{background:var(--brand-50);padding:2px 6px;border-radius:6px;font-size:14.5px;color:var(--brand-600)}
.article-body hr{border:0;border-top:1px dashed var(--line);margin:30px 0}

.empty-state{
  text-align:center;padding:60px 20px;background:#fff;
  border:1px dashed var(--line);border-radius:var(--radius-card);
}
.empty-state .circle{
  width:64px;height:64px;margin:0 auto 18px;border-radius:50%;
  background:var(--brand-50);display:grid;place-items:center;
}
.empty-state .circle svg{width:28px;height:28px;fill:none;stroke:var(--brand-600);stroke-width:1.8;stroke-linecap:round}
.empty-state h2{font-size:20px;margin-bottom:8px}
.empty-state p{font-size:14.5px;color:var(--ink-400);margin-bottom:22px}

.toc{
  position:sticky;top:96px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);padding:20px;box-shadow:var(--shadow-1);
}
.toc h2{font-size:14px;color:var(--ink-900);letter-spacing:.4px;margin-bottom:12px}
.toc ol{display:flex;flex-direction:column;gap:2px;counter-reset:toc}
.toc a{
  display:block;font-size:13.5px;line-height:1.6;color:var(--ink-400);
  padding:6px 10px;border-radius:8px;border-left:2px solid transparent;
  transition:all .18s ease;
}
.toc a:hover{background:var(--brand-50);color:var(--brand-600)}
.toc a.active{color:var(--brand-600);font-weight:600;border-left-color:var(--brand-600);background:var(--brand-50)}
.toc-tip{margin-top:14px;padding-top:14px;border-top:1px solid var(--line);font-size:12.5px;color:var(--ink-400);line-height:1.7}

.article-foot{margin-top:34px}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.tag-row .label{font-size:13px;color:var(--ink-400);margin-right:4px}
.tag{
  font-size:13px;padding:6px 13px;border-radius:999px;background:var(--brand-50);
  color:var(--brand-600);transition:all .18s ease;
}
.tag:hover{background:var(--brand-600);color:#fff}

.pager{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:26px}
.pager a{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:18px 20px;transition:all .18s ease;display:block;
}
.pager a:hover{border-color:var(--brand-500);box-shadow:var(--shadow-2);transform:translateY(-2px)}
.pager .k{font-size:12.5px;color:var(--ink-400);margin-bottom:6px}
.pager .t{font-size:15.5px;color:var(--ink-900);font-weight:600;line-height:1.55}

.section{margin-top:56px}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;transition:all .18s ease;display:flex;flex-direction:column;
  box-shadow:var(--shadow-1);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#DAD3F2}
.card-thumb{position:relative;aspect-ratio:16/9;background:var(--brand-50);overflow:hidden}
.card-thumb img{width:100%;height:100%;object-fit:cover}
.card-thumb .badge{position:absolute;left:12px;top:12px;background:rgba(255,255,255,.94)}
.card-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:17px;line-height:1.5;transition:color .18s ease}
.card:hover .card-body h3{color:var(--brand-500)}
.card-body p{font-size:14px;color:var(--ink-400);line-height:1.7}
.card-meta{margin-top:auto;font-size:13px;color:var(--ink-400);display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.card-meta .dot{width:3px;height:3px;border-radius:50%;background:#C6C1D8}

.cta-band{
  margin-top:56px;border-radius:20px;overflow:hidden;position:relative;
  background:var(--deep);color:#fff;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(100deg,rgba(20,16,43,.94),rgba(74,46,143,.72)),
    url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;
}
.cta-inner{position:relative;padding:46px 40px;display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:32px;align-items:center}
.cta-inner h2{color:#fff;font-size:26px;line-height:1.4}
.cta-inner p{color:rgba(255,255,255,.78);font-size:15px;margin-top:12px}
.cta-list{margin-top:18px;display:flex;flex-direction:column;gap:10px}
.cta-list li{font-size:14.5px;color:rgba(255,255,255,.86);display:flex;gap:10px;align-items:flex-start}
.cta-list svg{width:17px;height:17px;flex:0 0 auto;margin-top:5px;fill:none;stroke:var(--accent-500);stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end}
.btn-light{background:#fff;color:var(--brand-600)}
.btn-light:hover{background:var(--brand-50);transform:translateY(-1px)}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.45);color:#fff}
.btn-outline-light:hover{background:rgba(255,255,255,.12);border-color:#fff}

.back-top{
  position:fixed;right:20px;bottom:26px;width:44px;height:44px;border-radius:50%;
  background:var(--brand-600);color:#fff;display:grid;place-items:center;z-index:40;
  box-shadow:var(--shadow-2);opacity:0;pointer-events:none;transition:all .22s ease;
}
.back-top.show{opacity:1;pointer-events:auto}
.back-top:hover{background:var(--brand-500);transform:translateY(-2px)}
.back-top svg{width:18px;height:18px;fill:none;stroke:#fff;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}

/* ---------- footer ---------- */
.site-footer{margin-top:72px;background:var(--deep);color:rgba(255,255,255,.72);padding:56px 0 26px}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px}
.foot-brand .brand-mark{margin-bottom:14px}
.foot-brand .brand-text{color:#fff;font-size:17px;font-weight:700;display:block;margin-bottom:10px}
.foot-brand p{font-size:13.5px;line-height:1.8;color:rgba(255,255,255,.64);max-width:34ch}
.foot-contact{margin-top:18px;display:flex;flex-direction:column;gap:10px}
.foot-contact li{font-size:13px;color:rgba(255,255,255,.64);display:flex;gap:9px;align-items:center}
.foot-contact svg{width:15px;height:15px;fill:none;stroke:var(--accent-500);stroke-width:1.9;stroke-linecap:round}
.foot-col h4{color:#fff;font-size:14.5px;margin-bottom:16px;letter-spacing:.3px}
.foot-col ul{display:flex;flex-direction:column;gap:11px}
.foot-col a{font-size:13.5px;color:rgba(255,255,255,.68);transition:color .18s ease}
.foot-col a:hover{color:var(--accent-500)}
.foot-bottom{
  margin-top:42px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  font-size:12.5px;color:rgba(255,255,255,.5);
}
.foot-links{display:flex;gap:18px;flex-wrap:wrap}
.foot-links a{color:rgba(255,255,255,.6)}
.foot-links a:hover{color:var(--accent-500)}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .hot-keys,.search.topbar-search{display:none}
  .menu-btn{display:grid;margin-left:auto}
  .channelbar{display:none}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:28px}
  .toc{position:static}
  .cta-inner{grid-template-columns:minmax(0,1fr);padding:36px 26px}
  .cta-actions{justify-content:flex-start}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
  .article-head h1{font-size:30px}
  .reader{padding:26px 22px}
}
@media (max-width:767px){
  .topbar-inner{height:60px;gap:12px}
  .brand-sub{display:none}
  .article-head h1{font-size:26px}
  .article-head .bar{margin:14px 0}
  .card-grid{grid-template-columns:minmax(0,1fr)}
  .pager{grid-template-columns:minmax(0,1fr)}
  .foot-grid{grid-template-columns:minmax(0,1fr)}
  .section{margin-top:44px}
  .reader{padding:22px 18px}
  .article-body h2{font-size:21px}
  .article-body h3{font-size:18px}
  .crumb .cur{max-width:28ch}
}
@media (max-width:519px){
  .article-meta{font-size:12.8px}
  .btn{width:100%}
  .cta-actions .btn{width:auto;flex:1 1 auto}
  .back-top{right:14px;bottom:18px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}

/* roulang page: category1 */
:root{
  --brand-600:#4A2E8F;
  --brand-500:#6C4BD1;
  --brand-50:#F1EDFB;
  --accent-500:#17C3A2;
  --alert-500:#FF6A4D;
  --ink-900:#16122A;
  --ink-600:#4B4660;
  --ink-400:#6B6580;
  --line:#E6E2F2;
  --bg:#F7F6FB;
  --surface:#FFFFFF;
  --dark:#14102B;
  --r-card:14px;
  --r-btn:10px;
  --sh-1:0 1px 2px rgba(22,18,42,.06);
  --sh-2:0 10px 28px -14px rgba(74,46,143,.28);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.78;
  color:var(--ink-600);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700;line-height:1.34}
p{margin:0}
img{max-width:100%;display:block}
a{color:var(--brand-500);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-600)}
button{font-family:inherit}
.num{font-variant-numeric:tabular-nums}
::selection{background:var(--brand-500);color:#fff}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:#D8D1EC;border-radius:999px}
::-webkit-scrollbar-track{background:var(--brand-50)}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 16px}

/* ============ 吸顶导航 ============ */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.97);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease;
}
.site-header.scrolled{box-shadow:0 6px 20px -12px rgba(22,18,42,.35)}
.topbar-inner{display:flex;align-items:center;gap:18px;min-height:56px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;color:var(--ink-900)}
.brand-mark{
  width:34px;height:34px;border-radius:10px;flex-shrink:0;
  background:linear-gradient(135deg,var(--brand-600),var(--brand-500));
  display:inline-flex;align-items:center;justify-content:center;
}
.brand-mark svg{width:19px;height:19px;fill:#fff;stroke:none}
.brand-text{display:block;font-size:17px;font-weight:700;color:var(--brand-600);letter-spacing:.2px;line-height:1.25}
.brand-sub{display:block;font-size:11.5px;color:var(--ink-400);line-height:1.35}

.search{
  position:relative;flex:1;max-width:340px;display:flex;align-items:center;
  height:38px;padding:0 5px 0 16px;border:1px solid var(--line);
  border-radius:999px;background:var(--bg);
  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
.search input{
  flex:1;border:0;background:transparent;outline:none;
  font-size:14px;font-family:inherit;color:var(--ink-900);
}
.search input::placeholder{color:var(--ink-400)}
.search:focus-within{border-color:var(--brand-500);background:#fff;box-shadow:0 0 0 2px rgba(23,195,162,.45)}
.search button{
  width:30px;height:30px;flex-shrink:0;border:0;border-radius:999px;
  background:var(--brand-600);cursor:pointer;
  display:inline-flex;align-items:center;justify-content:center;
  transition:background .18s ease,transform .18s ease;
}
.search button:hover{background:var(--brand-500);transform:translateY(-1px)}
.search button svg{width:15px;height:15px;fill:none;stroke:#fff;stroke-width:2;stroke-linecap:round}

.hot-keys{display:flex;align-items:center;gap:8px;margin-left:auto}
.hot-label{font-size:12px;color:var(--ink-400)}
.hot-chip{
  font-size:12.5px;color:var(--brand-600);background:var(--brand-50);
  padding:5px 11px;border-radius:999px;border:1px solid transparent;
  white-space:nowrap;transition:background .18s ease,border-color .18s ease,color .18s ease;
}
.hot-chip:hover{background:#fff;border-color:var(--brand-500);color:var(--brand-500)}

.menu-btn{
  display:none;width:38px;height:38px;margin-left:auto;
  border:1px solid var(--line);border-radius:10px;background:#fff;
  align-items:center;justify-content:center;cursor:pointer;
  transition:border-color .18s ease,background .18s ease;
}
.menu-btn:hover{border-color:var(--brand-500);background:var(--brand-50)}
.menu-btn svg{width:19px;height:19px;fill:none;stroke:var(--ink-900);stroke-width:2;stroke-linecap:round}

.channelbar{border-top:1px solid var(--line);background:#fff}
.channel-inner{display:flex;align-items:center;gap:6px;height:44px;overflow-x:auto;scrollbar-width:none}
.channel-inner::-webkit-scrollbar{display:none}
.channel{
  position:relative;height:44px;padding:0 14px;flex-shrink:0;
  display:inline-flex;align-items:center;font-size:14.5px;color:var(--ink-600);
  transition:color .18s ease;
}
.channel::after{
  content:"";position:absolute;left:14px;right:14px;bottom:0;height:2px;
  background:var(--brand-600);border-radius:2px 2px 0 0;
  transform:scaleX(0);transform-origin:center;transition:transform .2s ease;
}
.channel:hover{color:var(--ink-900)}
.channel:hover::after{transform:scaleX(1);opacity:.4}
.channel.active{color:var(--brand-600);font-weight:600}
.channel.active::after{transform:scaleX(1);opacity:1}

/* ============ 移动抽屉 ============ */
.drawer{position:fixed;inset:0;z-index:80;display:none}
.drawer.open{display:block}
.drawer-mask{position:absolute;inset:0;background:rgba(20,16,43,.55)}
.drawer-panel{
  position:absolute;top:0;right:0;height:100%;width:min(84vw,320px);
  background:#fff;padding:20px;overflow-y:auto;
  box-shadow:-12px 0 34px -18px rgba(22,18,42,.5);
}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-close{
  width:34px;height:34px;border:1px solid var(--line);border-radius:10px;
  background:#fff;font-size:18px;line-height:1;color:var(--ink-600);cursor:pointer;
}
.drawer-close:hover{border-color:var(--brand-500);color:var(--brand-600)}
.drawer-nav{display:grid;gap:6px;margin-bottom:22px}
.drawer-link{
  padding:12px 14px;border-radius:10px;font-size:15px;color:var(--ink-600);
  background:var(--bg);transition:background .18s ease,color .18s ease;
}
.drawer-link:hover{background:var(--brand-50);color:var(--brand-600)}
.drawer-link.active{background:var(--brand-50);color:var(--brand-600);font-weight:600}
.drawer-title{font-size:12.5px;color:var(--ink-400);margin:0 0 10px 4px}

/* ============ 页头横幅 ============ */
.page-banner{
  position:relative;min-height:296px;display:flex;align-items:center;
  padding:56px 0;
  background-image:linear-gradient(100deg,rgba(20,16,43,.92),rgba(74,46,143,.62)),url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
}
.page-banner::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:64px 64px;pointer-events:none;
}
.page-banner .wrap{position:relative;z-index:2}
.crumb{font-size:13px;color:rgba(255,255,255,.68);margin-bottom:14px}
.crumb a{color:rgba(255,255,255,.86)}
.crumb a:hover{color:#fff}
.crumb span{margin:0 6px;color:rgba(255,255,255,.45)}
.page-banner h1{font-size:40px;line-height:1.24;color:#fff;margin-bottom:14px}
.banner-lead{font-size:15.5px;color:rgba(255,255,255,.82);max-width:640px}
.banner-stats{display:flex;flex-wrap:wrap;gap:36px;margin-top:28px}
.banner-stats .num{display:block;font-size:24px;font-weight:700;color:#fff}
.banner-stats .cap{display:block;font-size:13px;color:rgba(255,255,255,.7)}

/* ============ 通用板块 ============ */
.section{padding:64px 0}
.section.alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:30px}
.section-head h2{font-size:28px;position:relative;padding-left:16px}
.section-head h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;
  border-radius:3px;background:var(--brand-600);
}
.section-head p{font-size:14.5px;color:var(--ink-400);max-width:520px;margin-top:8px}

.split{display:grid;grid-template-columns:5fr 7fr;gap:38px;align-items:start}
.prose p{font-size:16px;margin-bottom:16px}
.prose p:last-of-type{margin-bottom:0}

.points{list-style:none;padding:0;margin:20px 0 0;display:grid;gap:14px}
.points li{display:flex;gap:12px;font-size:15px;color:var(--ink-600)}
.points .dot{
  width:22px;height:22px;border-radius:7px;flex-shrink:0;margin-top:4px;
  background:var(--brand-50);color:var(--brand-600);
  display:inline-flex;align-items:center;justify-content:center;
}
.points .dot svg{width:12px;height:12px;fill:none;stroke:currentColor;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
.points strong{color:var(--ink-900);font-weight:600}

/* 横向条目列表 */
.news-list{display:grid}
.news-item{
  position:relative;display:flex;gap:16px;padding:16px 0;
  border-bottom:1px solid var(--line);color:inherit;
}
.news-item:first-child{padding-top:0}
.news-item:last-child{border-bottom:0;padding-bottom:0}
.news-item::before{
  content:"";position:absolute;left:-16px;top:16px;bottom:16px;width:3px;
  border-radius:3px;background:transparent;transition:background .18s ease;
}
.news-item:first-child::before{top:0}
.news-item:hover::before{background:var(--accent-500)}
.news-item img{
  width:160px;height:100px;flex-shrink:0;object-fit:cover;
  border-radius:12px;background:var(--brand-50);
}
.news-body{min-width:0}
.news-body h3{font-size:17px;margin-bottom:6px;transition:color .18s ease}
.news-item:hover .news-body h3{color:var(--brand-500)}
.news-body p{font-size:14.5px;color:var(--ink-600);margin-bottom:8px}
.news-meta{font-size:13px;color:var(--ink-400);display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.news-meta i{font-style:normal;color:#D6D0E6}

/* 对照卡 */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.compare-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:26px}
.compare-card.alt{background:var(--brand-50);border-color:#E2DAF8}
.compare-card h3{font-size:19px;margin-bottom:6px}
.compare-meta{font-size:13px;color:var(--ink-400);margin-bottom:20px}
.metric{margin-bottom:16px}
.metric-top{display:flex;justify-content:space-between;font-size:14px;color:var(--ink-600)}
.metric-top b{color:var(--ink-900);font-variant-numeric:tabular-nums}
.bar{height:8px;border-radius:999px;background:var(--brand-50);margin-top:8px;overflow:hidden}
.compare-card.alt .bar{background:#fff}
.bar i{display:block;height:100%;border-radius:999px;background:var(--brand-600)}
.compare-card.alt .bar i{background:var(--accent-500)}
.compare-sum{
  margin-top:24px;font-size:14.5px;color:var(--ink-600);
  background:#fff;border:1px solid var(--line);border-left:3px solid var(--accent-500);
  border-radius:12px;padding:16px 20px;
}

/* 速查表 */
.table-scroll{overflow-x:auto;border-radius:var(--r-card)}
.speed-table{min-width:720px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden}
.speed-head,.speed-row{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr 1.1fr;gap:12px;padding:14px 22px;align-items:center}
.speed-head{background:var(--brand-50);font-size:13px;font-weight:600;color:var(--brand-600);letter-spacing:.3px}
.speed-row{border-top:1px solid var(--line);font-size:14.5px;transition:background .18s ease}
.speed-row:hover{background:#FBFAFE}
.speed-row:hover .cell-name{color:var(--brand-500)}
.cell-name{font-weight:600;color:var(--ink-900);transition:color .18s ease}
.tag{
  display:inline-flex;align-items:center;padding:3px 10px;border-radius:999px;
  font-size:12px;font-style:normal;background:var(--brand-50);color:var(--brand-600);white-space:nowrap;
}
.tag.ok{background:rgba(23,195,162,.14);color:#0E8C75}
.tag.warn{background:rgba(255,106,77,.14);color:#C43D22}

/* 流程步骤 */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.step{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:26px 24px;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.step:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#DCD2F5}
.step-index{
  width:34px;height:34px;border-radius:10px;margin-bottom:16px;
  background:var(--brand-50);color:var(--brand-600);font-weight:700;
  display:inline-flex;align-items:center;justify-content:center;
  font-variant-numeric:tabular-nums;
}
.step h3{font-size:18px;margin-bottom:8px}
.step p{font-size:14.5px}

/* FAQ */
.faq{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;transition:border-color .18s ease,box-shadow .18s ease;
}
.faq-item:hover{border-color:#D9CFEF}
.faq-item.open{border-color:var(--brand-500);box-shadow:var(--sh-1)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:18px 20px;background:none;border:0;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink-900);line-height:1.5;
}
.faq-q:focus-visible{outline:2px solid var(--accent-500);outline-offset:-3px}
.faq-sign{position:relative;width:20px;height:20px;flex-shrink:0}
.faq-sign::before,.faq-sign::after{
  content:"";position:absolute;background:var(--brand-600);border-radius:2px;
  transition:transform .22s ease,opacity .22s ease;
}
.faq-sign::before{left:0;right:0;top:9px;height:2px}
.faq-sign::after{top:0;bottom:0;left:9px;width:2px}
.faq-item.open .faq-sign::after{transform:scaleY(0);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-item.open .faq-a{max-height:360px}
.faq-a p{padding:0 20px 20px;font-size:15px;color:var(--ink-600)}

/* 需求提交 */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:start}
.form-card{
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px;
  box-shadow:var(--sh-1);
}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--ink-900);margin-bottom:7px}
.field .req{color:var(--alert-500)}
.field input,.field select,.field textarea{
  width:100%;border:1px solid var(--line);border-radius:10px;background:#fff;
  font-family:inherit;font-size:14.5px;color:var(--ink-900);outline:none;
  height:44px;padding:0 14px;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.field textarea{height:106px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand-500);box-shadow:0 0 0 2px var(--brand-50)}
.form-note{font-size:12.5px;color:var(--ink-400);margin-top:12px;line-height:1.7}
.form-status{display:none;margin-top:14px;font-size:13.5px;border-radius:10px;padding:12px 14px}
.form-status.ok{display:block;background:rgba(23,195,162,.12);color:#0E8C75}
.form-status.bad{display:block;background:rgba(255,106,77,.12);color:#C43D22}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:12px 24px;
  border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;text-decoration:none;
  transition:transform .16s ease,background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.btn-primary{background:var(--brand-600);color:#fff}
.btn-primary:hover{background:var(--brand-500);color:#fff;transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-primary:focus-visible{outline:2px solid var(--accent-500);outline-offset:2px}
.btn-light{background:#fff;border-color:var(--line);color:var(--brand-600)}
.btn-light:hover{background:var(--brand-50);border-color:#D6CBEF;color:var(--brand-600);transform:translateY(-1px)}
.btn-light:focus-visible{outline:2px solid var(--accent-500);outline-offset:2px}
.btn-block{width:100%;justify-content:center}
.link-cta{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--brand-600)}
.link-cta svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .18s ease}
.link-cta:hover svg{transform:translateX(3px)}

/* 页脚 */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:56px 0 26px;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:34px}
.foot-brand .brand-mark{background:linear-gradient(135deg,var(--brand-500),var(--accent-500))}
.foot-brand .brand-text{color:#fff;font-size:17px;font-weight:700}
.foot-brand p{margin-top:12px;font-size:14px;color:rgba(255,255,255,.62);max-width:330px}
.foot-contact{list-style:none;padding:0;margin:18px 0 0;display:grid;gap:10px;font-size:13.5px}
.foot-contact li{display:flex;align-items:center;gap:8px;color:rgba(255,255,255,.62)}
.foot-contact svg{width:15px;height:15px;fill:none;stroke:var(--accent-500);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.foot-col h4{color:#fff;font-size:15px;margin-bottom:14px}
.foot-col ul{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.foot-col a{font-size:14px;color:rgba(255,255,255,.68)}
.foot-col a:hover{color:var(--accent-500)}
.foot-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:14px;
  font-size:13px;color:rgba(255,255,255,.5);
}
.foot-links{display:flex;flex-wrap:wrap;gap:18px}
.foot-links a{color:rgba(255,255,255,.6)}
.foot-links a:hover{color:var(--accent-500)}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .hot-keys{display:none}
  .menu-btn{display:inline-flex}
  .split{grid-template-columns:1fr;gap:30px}
  .compare{grid-template-columns:1fr}
  .faq{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
  .page-banner h1{font-size:32px}
  .section-head h2{font-size:24px}
}
@media (max-width:768px){
  .search{display:none}
  .section{padding:44px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px;margin-bottom:24px}
  .page-banner{padding:44px 0;min-height:auto}
  .banner-stats{gap:26px;margin-top:22px}
  .banner-stats .num{font-size:20px}
  .news-item img{width:104px;height:70px}
  .news-item::before{display:none}
  .news-body h3{font-size:16px}
}
@media (max-width:520px){
  .page-banner h1{font-size:26px}
  .banner-lead{font-size:14.5px}
  .brand-sub{display:none}
  .brand-text{font-size:16px}
  .foot-grid{grid-template-columns:1fr}
  .section-head h2{font-size:22px}
}

/* roulang page: category2 */
:root{
    --brand-600:#4A2E8F;
    --brand-500:#6C4BD1;
    --brand-50:#F1EDFB;
    --accent-500:#17C3A2;
    --alert-500:#FF6A4D;
    --ink-900:#16122A;
    --ink-600:#4B4660;
    --ink-400:#6B6580;
    --line:#E6E2F2;
    --bg:#F7F6FB;
    --surface:#FFFFFF;
    --deep:#14102B;
    --radius-card:14px;
    --radius-btn:10px;
    --shadow-1:0 1px 2px rgba(22,18,42,.06);
    --shadow-2:0 10px 28px -14px rgba(74,46,143,.28);
    --wrap:1200px;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
    font-size:16px;
    line-height:1.78;
    color:var(--ink-600);
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;border-style:none;}
  a{color:inherit;text-decoration:none;transition:color .18s ease,background-color .18s ease,border-color .18s ease;}
  button,input,select,textarea{font:inherit;color:inherit;}
  h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700;line-height:1.35;}
  p{margin:0;}
  ul{margin:0;padding:0;list-style:none;}
  svg{display:block;}
  .num{font-variant-numeric:tabular-nums;font-weight:700;}
  .wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px;}

  /* ---------- 导航 ---------- */
  .site-header{
    position:sticky;top:0;z-index:50;
    background:rgba(255,255,255,.97);
    -webkit-backdrop-filter:blur(10px);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);
    transition:box-shadow .2s ease;
  }
  .site-header.scrolled{box-shadow:0 6px 20px -12px rgba(22,18,42,.35);}
  .topbar-inner{display:flex;align-items:center;gap:20px;min-height:64px;padding-top:8px;padding-bottom:8px;}
  .brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
  .brand-mark{
    width:38px;height:38px;border-radius:11px;flex:0 0 auto;
    background:linear-gradient(135deg,var(--brand-600),var(--brand-500));
    display:grid;place-items:center;
  }
  .brand-mark svg{width:20px;height:20px;fill:#fff;stroke:none;}
  .brand-text{display:block;font-size:17px;font-weight:700;color:var(--brand-600);letter-spacing:.2px;line-height:1.2;}
  .brand-sub{display:block;font-size:12px;color:var(--ink-400);line-height:1.3;margin-top:2px;}

  .search{position:relative;flex:1 1 auto;max-width:380px;display:flex;align-items:center;}
  .search input{
    width:100%;height:40px;border-radius:999px;border:1px solid var(--line);
    background:var(--bg);padding:0 46px 0 16px;font-size:14px;color:var(--ink-900);
    outline:none;transition:border-color .18s ease,box-shadow .18s ease,background-color .18s ease;
  }
  .search input::placeholder{color:var(--ink-400);}
  .search input:focus{border-color:var(--brand-500);background:#fff;box-shadow:0 0 0 2px var(--brand-50);}
  .search button{
    position:absolute;right:6px;width:30px;height:30px;border:0;border-radius:50%;
    background:var(--brand-600);display:grid;place-items:center;cursor:pointer;transition:background-color .18s ease;
  }
  .search button:hover{background:var(--brand-500);}
  .search button svg{width:15px;height:15px;stroke:#fff;fill:none;stroke-width:2;}

  .hot-keys{display:flex;align-items:center;gap:8px;margin-left:auto;flex:0 0 auto;}
  .hot-label{font-size:13px;color:var(--ink-400);}
  .hot-chip{
    font-size:13px;padding:5px 12px;border-radius:999px;
    background:var(--brand-50);color:var(--brand-600);white-space:nowrap;
  }
  .hot-chip:hover{background:var(--brand-600);color:#fff;}

  .menu-btn{
    display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
    background:#fff;cursor:pointer;place-items:center;margin-left:auto;
  }
  .menu-btn svg{width:20px;height:20px;stroke:var(--ink-900);fill:none;stroke-width:2;stroke-linecap:round;}
  .menu-btn:hover{background:var(--brand-50);}

  .channelbar{border-top:1px solid var(--line);}
  .channel-inner{display:flex;align-items:center;gap:28px;height:46px;overflow-x:auto;scrollbar-width:none;}
  .channel-inner::-webkit-scrollbar{display:none;}
  .channel{
    position:relative;display:flex;align-items:center;height:46px;font-size:15px;
    color:var(--ink-600);border-bottom:2px solid transparent;white-space:nowrap;
  }
  .channel:hover{color:var(--ink-900);border-bottom-color:#CEC4EE;}
  .channel.active{color:var(--brand-600);font-weight:600;border-bottom-color:var(--brand-600);}

  /* 移动抽屉 */
  .drawer-mask{
    position:fixed;inset:0;background:rgba(20,16,43,.5);opacity:0;visibility:hidden;
    transition:opacity .22s ease,visibility .22s ease;z-index:60;
  }
  .drawer{
    position:fixed;top:0;right:0;height:100%;width:290px;max-width:86vw;background:#fff;z-index:61;
    transform:translateX(102%);transition:transform .26s ease;padding:20px;overflow-y:auto;
    box-shadow:-12px 0 34px -18px rgba(20,16,43,.6);
  }
  body.drawer-open .drawer-mask{opacity:1;visibility:visible;}
  body.drawer-open .drawer{transform:translateX(0);}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
  .drawer-head strong{color:var(--brand-600);font-size:16px;}
  .drawer-close{width:34px;height:34px;border-radius:9px;border:1px solid var(--line);background:#fff;cursor:pointer;display:grid;place-items:center;}
  .drawer-close svg{width:16px;height:16px;stroke:var(--ink-900);fill:none;stroke-width:2;stroke-linecap:round;}
  .drawer .search{max-width:none;width:100%;margin-bottom:16px;display:flex;}
  .drawer nav a{
    display:block;padding:12px 14px;border-radius:10px;font-size:15px;color:var(--ink-600);
    border:1px solid transparent;
  }
  .drawer nav a:hover{background:var(--brand-50);color:var(--brand-600);}
  .drawer nav a.active{background:var(--brand-50);color:var(--brand-600);font-weight:600;border-color:#DED5F7;}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:13px 26px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;
    border:1px solid transparent;cursor:pointer;transition:all .18s ease;
  }
  .btn-primary{background:var(--brand-600);color:#fff;box-shadow:0 1px 2px rgba(22,18,42,.12);}
  .btn-primary:hover{background:var(--brand-500);transform:translateY(-1px);box-shadow:var(--shadow-2);}
  .btn-primary:active{transform:translateY(0);}
  .btn-ghost{background:#fff;color:var(--brand-600);border-color:var(--line);}
  .btn-ghost:hover{background:var(--brand-50);border-color:#DED5F7;}
  .btn-light{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.35);}
  .btn-light:hover{background:rgba(255,255,255,.2);}
  .btn:focus-visible,.channel:focus-visible,.hot-chip:focus-visible,.link-arrow:focus-visible{
    outline:2px solid var(--accent-500);outline-offset:2px;
  }
  .link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--brand-600);font-weight:600;font-size:15px;}
  .link-arrow svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;transition:transform .18s ease;}
  .link-arrow:hover{color:var(--brand-500);}
  .link-arrow:hover svg{transform:translateX(3px);}

  /* ---------- 页头横幅 ---------- */
  .page-banner{
    position:relative;overflow:hidden;color:#fff;
    background:var(--deep) url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
    padding:64px 0 60px;
  }
  .page-banner::before{
    content:"";position:absolute;inset:0;
    background:linear-gradient(100deg,rgba(20,16,43,.92),rgba(74,46,143,.6));
  }
  .page-banner::after{
    content:"";position:absolute;inset:0;
    background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
    background-size:48px 48px;opacity:.6;
  }
  .banner-inner{position:relative;z-index:2;max-width:760px;}
  .crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.72);margin-bottom:18px;flex-wrap:wrap;}
  .crumb a:hover{color:#fff;}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.4px;
    color:#fff;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);
    padding:5px 14px;border-radius:999px;margin-bottom:18px;
  }
  .page-banner h1{font-size:40px;color:#fff;letter-spacing:.5px;}
  .banner-lead{margin-top:16px;font-size:17px;color:rgba(255,255,255,.82);max-width:620px;}
  .banner-stats{display:flex;flex-wrap:wrap;gap:36px;margin-top:32px;padding-top:24px;border-top:1px solid rgba(255,255,255,.18);}
  .banner-stats .stat b{display:block;font-size:26px;color:#fff;line-height:1.2;}
  .banner-stats .stat span{font-size:13px;color:rgba(255,255,255,.7);}

  /* ---------- 板块 ---------- */
  .section{padding:76px 0;}
  .section.alt{background:var(--brand-50);}
  .section.deep{background:var(--deep);color:rgba(255,255,255,.78);}
  .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap;}
  .section-head h2{font-size:28px;position:relative;padding-left:16px;}
  .section-head h2::before{
    content:"";position:absolute;left:0;top:8px;bottom:8px;width:4px;border-radius:2px;background:var(--brand-600);
  }
  .section-head .lead{margin-top:10px;font-size:15px;color:var(--ink-400);padding-left:16px;max-width:640px;}
  .section.deep .section-head h2{color:#fff;}
  .section.deep .section-head h2::before{background:var(--accent-500);}
  .section.deep .section-head .lead{color:rgba(255,255,255,.62);}

  /* ---------- 大图卡 ---------- */
  .feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px;}
  .feature-card{
    background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
    box-shadow:var(--shadow-1);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
    display:flex;flex-direction:column;
  }
  .feature-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#DED5F7;}
  .feature-card .thumb{position:relative;aspect-ratio:16/9;background:var(--brand-50);overflow:hidden;}
  .feature-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
  .feature-card:hover .thumb img{transform:scale(1.03);}
  .feature-body{padding:24px 26px 28px;}
  .tag{
    display:inline-block;font-size:12px;font-weight:600;padding:4px 12px;border-radius:999px;
    background:var(--brand-50);color:var(--brand-600);margin-bottom:14px;
  }
  .tag.accent{background:rgba(23,195,162,.12);color:#0E8F78;}
  .card-title{font-size:19px;margin-bottom:10px;}
  .card-text{font-size:15px;color:var(--ink-600);}
  .feature-card:hover .card-title{color:var(--brand-500);}

  /* ---------- 要点卡 ---------- */
  .point-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
  .point-card{
    background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:26px 26px 24px;
    box-shadow:var(--shadow-1);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  }
  .point-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#DED5F7;}
  .icon-badge{
    width:42px;height:42px;border-radius:11px;background:var(--brand-50);
    display:grid;place-items:center;margin-bottom:16px;
  }
  .icon-badge svg{width:22px;height:22px;stroke:var(--brand-600);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
  .point-card h3{font-size:17px;margin-bottom:8px;}
  .point-card p{font-size:15px;}
  .meta-line{margin-top:14px;font-size:13px;color:var(--ink-400);display:flex;align-items:center;gap:8px;}
  .dot{width:4px;height:4px;border-radius:50%;background:var(--accent-500);flex:0 0 auto;}

  /* ---------- 时间线 ---------- */
  .step-list{display:grid;gap:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;}
  .step-item{display:flex;gap:20px;padding:24px 28px;border-bottom:1px dashed var(--line);transition:background-color .18s ease;}
  .step-item:last-child{border-bottom:0;}
  .step-item:hover{background:var(--brand-50);}
  .step-no{
    flex:0 0 auto;width:34px;height:34px;border-radius:50%;background:var(--brand-600);color:#fff;
    display:grid;place-items:center;font-size:14px;font-weight:700;font-variant-numeric:tabular-nums;
  }
  .step-item h3{font-size:17px;margin-bottom:6px;}
  .step-item p{font-size:15px;}

  /* ---------- 参数表 ---------- */
  .table-scroll{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);}
  table.param-table{width:100%;border-collapse:collapse;min-width:640px;}
  table.param-table th,table.param-table td{
    padding:16px 20px;text-align:left;font-size:15px;border-bottom:1px solid var(--line);vertical-align:top;
  }
  table.param-table thead th{
    background:var(--brand-50);color:var(--brand-600);font-weight:600;font-size:14px;white-space:nowrap;
  }
  table.param-table tbody tr:last-child td{border-bottom:0;}
  table.param-table tbody tr:hover{background:#FBFAFE;}
  table.param-table td:first-child{color:var(--ink-900);font-weight:600;}
  .table-note{margin-top:14px;font-size:13px;color:var(--ink-400);}

  /* ---------- FAQ ---------- */
  .faq-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;align-items:start;}
  .faq-item{
    background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
    box-shadow:var(--shadow-1);transition:border-color .18s ease,box-shadow .18s ease;
  }
  .faq-item[open]{border-color:#DED5F7;box-shadow:var(--shadow-2);}
  .faq-item summary{
    list-style:none;cursor:pointer;display:flex;align-items:flex-start;gap:14px;
    padding:18px 20px;font-size:16px;font-weight:600;color:var(--ink-900);
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary::after{
    content:"+";margin-left:auto;flex:0 0 auto;width:22px;height:22px;line-height:20px;text-align:center;
    border-radius:50%;background:var(--brand-50);color:var(--brand-600);font-weight:700;
    transition:transform .18s ease,background-color .18s ease;
  }
  .faq-item[open] summary::after{content:"−";background:var(--brand-600);color:#fff;}
  .faq-item .faq-body{padding:0 20px 20px;font-size:15px;border-top:1px solid var(--line);padding-top:14px;margin-top:2px;}

  /* ---------- CTA ---------- */
  .cta-band{
    position:relative;overflow:hidden;background:var(--deep);color:#fff;padding:70px 0;border-radius:0;
  }
  .cta-band::before{
    content:"";position:absolute;inset:0;
    background:radial-gradient(720px 320px at 12% 10%,rgba(108,75,209,.5),transparent 62%),
               radial-gradient(520px 260px at 88% 90%,rgba(23,195,162,.28),transparent 60%);
  }
  .cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;}
  .cta-inner h2{color:#fff;font-size:28px;margin-bottom:14px;}
  .cta-inner p{color:rgba(255,255,255,.75);font-size:16px;max-width:520px;}
  .cta-actions{display:flex;gap:14px;flex-wrap:wrap;justify-content:flex-end;}
  .cta-list{margin-top:22px;display:grid;gap:10px;}
  .cta-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:rgba(255,255,255,.82);}
  .cta-list svg{width:18px;height:18px;flex:0 0 auto;margin-top:5px;stroke:var(--accent-500);fill:none;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;}

  /* ---------- 页脚 ---------- */
  .site-footer{background:var(--deep);color:rgba(255,255,255,.68);padding:64px 0 0;font-size:14px;}
  .foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:44px;}
  .foot-brand .brand-mark{width:36px;height:36px;margin-bottom:14px;}
  .foot-brand .brand-text{color:#fff;font-size:17px;}
  .foot-brand p{margin-top:12px;max-width:340px;line-height:1.75;}
  .foot-contact{margin-top:18px;display:grid;gap:10px;}
  .foot-contact li{display:flex;gap:9px;align-items:center;font-size:13.5px;}
  .foot-contact svg{width:16px;height:16px;flex:0 0 auto;stroke:var(--accent-500);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
  .foot-col h4{color:#fff;font-size:15px;margin-bottom:16px;}
  .foot-col li{margin-bottom:10px;}
  .foot-col a:hover,.foot-brand a:hover{color:var(--accent-500);}
  .foot-bottom{
    border-top:1px solid rgba(255,255,255,.12);padding:20px 0;display:flex;justify-content:space-between;
    align-items:center;gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.5);
  }
  .foot-links{display:flex;gap:20px;}
  .foot-links a:hover{color:var(--accent-500);}

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

  /* ---------- 响应式 ---------- */
  @media (max-width:1023px){
    .search,.hot-keys{display:none;}
    .menu-btn{display:grid;}
    .channelbar{display:none;}
    .page-banner{padding:52px 0 48px;}
    .page-banner h1{font-size:32px;}
    .cta-inner{grid-template-columns:1fr;gap:28px;}
    .cta-actions{justify-content:flex-start;}
    .foot-grid{grid-template-columns:1fr 1fr;gap:32px;}
  }
  @media (max-width:767px){
    .wrap{padding:0 16px;}
    .section{padding:52px 0;}
    .section-head{margin-bottom:26px;}
    .section-head h2{font-size:22px;}
    .page-banner{padding:40px 0 38px;}
    .page-banner h1{font-size:27px;}
    .banner-lead{font-size:15.5px;}
    .banner-stats{gap:24px;margin-top:24px;padding-top:20px;}
    .banner-stats .stat b{font-size:22px;}
    .feature-grid,.point-grid,.faq-list{grid-template-columns:1fr;}
    .feature-body{padding:20px;}
    .point-card{padding:22px 20px;}
    .step-item{padding:20px;}
    .cta-band{padding:52px 0;}
    .cta-inner h2{font-size:22px;}
    .foot-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px;}
    .foot-bottom{flex-direction:column;align-items:flex-start;}
  }
  @media (max-width:520px){
    body{font-size:15.5px;}
    .brand-text{font-size:15.5px;}
    .brand-sub{display:none;}
    .btn{width:100%;}
    .cta-actions{flex-direction:column;align-items:stretch;}
    .banner-stats{gap:20px 28px;}
  }

/* roulang page: category3 */
:root{
  --brand-600:#4A2E8F;
  --brand-500:#6C4BD1;
  --brand-50:#F1EDFB;
  --accent-500:#17C3A2;
  --alert-500:#FF6A4D;
  --ink-900:#16122A;
  --ink-600:#4B4660;
  --ink-400:#6B6580;
  --line:#E6E2F2;
  --bg:#F7F6FB;
  --surface:#FFFFFF;
  --dark:#14102B;
  --r-card:14px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(22,18,42,.06);
  --sh-2:0 10px 28px -14px rgba(74,46,143,.28);
  --wrap:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink-600);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;line-height:1.78;
}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700;line-height:1.3}
p{margin:0 0 .9em}
p:last-child{margin-bottom:0}
a{color:var(--brand-500);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-600)}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
svg{display:block}
:focus-visible{outline:2px solid var(--accent-500);outline-offset:2px}
::selection{background:var(--brand-600);color:#fff}
.num{font-variant-numeric:tabular-nums}

/* 容器 */
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 16px}

/* 顶部导航 */
.site-header{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.97);
  border-bottom:1px solid var(--line);transition:box-shadow .18s ease;
}
.site-header.is-stuck{box-shadow:0 6px 20px -12px rgba(22,18,42,.35)}
.topbar-inner{display:flex;align-items:center;gap:18px;min-height:56px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-mark{
  width:34px;height:34px;flex:none;border-radius:10px;
  background:linear-gradient(135deg,var(--brand-600),var(--brand-500));
  display:grid;place-items:center;
}
.brand-mark svg{width:20px;height:20px;fill:#fff;stroke:none}
.brand-text{display:block;font-size:16px;font-weight:700;color:var(--brand-600);letter-spacing:.2px;line-height:1.3}
.brand-sub{display:block;font-size:12px;color:var(--ink-400);line-height:1.3}
.search{
  position:relative;flex:1;max-width:340px;display:flex;align-items:center;gap:6px;
  height:38px;padding:0 4px 0 16px;border:1px solid var(--line);border-radius:var(--r-pill);
  background:#fff;transition:border-color .18s ease,box-shadow .18s ease;
}
.search:focus-within{border-color:var(--brand-500);box-shadow:0 0 0 2px var(--brand-50)}
.search input{flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:14px}
.search input::placeholder{color:var(--ink-400)}
.search button{
  width:30px;height:30px;flex:none;border:0;border-radius:50%;
  background:var(--brand-50);display:grid;place-items:center;transition:background .18s ease;
}
.search button:hover{background:var(--brand-600)}
.search button svg{width:16px;height:16px;fill:none;stroke:var(--brand-600);stroke-width:2;stroke-linecap:round}
.search button:hover svg{stroke:#fff}
.hot-keys{display:flex;align-items:center;gap:8px;margin-left:auto}
.hot-label{font-size:12px;color:var(--ink-400)}
.hot-chip{
  display:inline-block;padding:4px 12px;border-radius:var(--r-pill);
  background:var(--brand-50);color:var(--brand-600);font-size:12.5px;white-space:nowrap;
  transition:background .18s ease,color .18s ease;
}
.hot-chip:hover{background:var(--brand-600);color:#fff}
.menu-btn{
  display:none;width:40px;height:40px;flex:none;border:1px solid var(--line);border-radius:10px;
  background:#fff;place-items:center;transition:background .18s ease,border-color .18s ease;
}
.menu-btn:hover{background:var(--brand-50);border-color:#D9CFF5}
.menu-btn svg{width:20px;height:20px;fill:none;stroke:var(--ink-900);stroke-width:2;stroke-linecap:round}
.channelbar{border-top:1px solid var(--line)}
.channel-inner{display:flex;align-items:stretch;gap:4px;height:44px;overflow-x:auto;scrollbar-width:none}
.channel-inner::-webkit-scrollbar{display:none}
.channel{
  position:relative;display:inline-flex;align-items:center;padding:0 14px;
  font-size:14.5px;color:var(--ink-600);white-space:nowrap;
}
.channel::after{
  content:"";position:absolute;left:14px;right:14px;bottom:0;height:2px;
  background:var(--brand-600);transform:scaleX(0);transform-origin:left;
  transition:transform .18s ease;
}
.channel:hover{color:var(--ink-900)}
.channel:hover::after{transform:scaleX(1)}
.channel.active{color:var(--ink-900);font-weight:600}
.channel.active::after{transform:scaleX(1)}

/* 移动抽屉 */
.drawer-mask{
  position:fixed;inset:0;z-index:60;background:rgba(20,16,43,.55);
  opacity:0;visibility:hidden;transition:opacity .2s ease,visibility .2s ease;
}
.drawer-mask.show{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;z-index:70;width:min(330px,88vw);
  background:#fff;padding:20px;overflow-y:auto;
  transform:translateX(100%);transition:transform .24s ease;
  box-shadow:-10px 0 30px -18px rgba(22,18,42,.5);
}
.drawer.show{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}
.drawer-close{
  width:36px;height:36px;border:1px solid var(--line);border-radius:10px;background:#fff;
  display:grid;place-items:center;
}
.drawer-close svg{width:18px;height:18px;fill:none;stroke:var(--ink-900);stroke-width:2;stroke-linecap:round}
.drawer-title{font-size:13px;color:var(--ink-400);margin:18px 0 8px;letter-spacing:.4px}
.drawer-link{
  display:block;padding:12px 14px;border-radius:10px;color:var(--ink-900);font-size:15px;
  border:1px solid transparent;transition:background .18s ease,border-color .18s ease;
}
.drawer-link:hover{background:var(--brand-50);border-color:#E3DCF8;color:var(--brand-600)}
.drawer-link.active{background:var(--brand-50);color:var(--brand-600);font-weight:600}
.drawer-keys{display:flex;flex-wrap:wrap;gap:8px}

/* 页头横幅 */
.page-banner{position:relative;overflow:hidden;background:var(--dark)}
.page-banner > img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.45}
.page-banner::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(20,16,43,.92),rgba(74,46,143,.58));
}
.banner-inner{position:relative;z-index:2;padding:58px 16px 52px;min-height:300px;display:flex;flex-direction:column;justify-content:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;align-self:flex-start;
  padding:5px 14px;border-radius:var(--r-pill);font-size:12.5px;letter-spacing:.4px;
  background:rgba(255,255,255,.14);color:#EFE9FF;border:1px solid rgba(255,255,255,.22);
}
.page-banner h1{margin-top:18px;color:#fff;font-size:40px;letter-spacing:.5px;max-width:820px}
.banner-sub{margin-top:14px;color:rgba(255,255,255,.82);font-size:16px;max-width:640px}
.banner-stats{display:flex;flex-wrap:wrap;gap:36px;margin-top:30px}
.banner-stats li b{display:block;font-size:26px;font-weight:700;color:#fff;line-height:1.25}
.banner-stats li span{font-size:13px;color:rgba(255,255,255,.7)}

/* 板块通用 */
.section{padding:66px 0}
.section.on-white{background:var(--surface)}
.section.on-tint{background:linear-gradient(180deg,#F4F1FC,#F7F6FB)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:30px;flex-wrap:wrap}
.sec-title{position:relative;padding-left:14px;font-size:26px}
.sec-title::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--brand-600);
}
.sec-desc{margin-top:9px;font-size:14.5px;color:var(--ink-400);max-width:660px}
.text-cta{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--brand-600)}
.text-cta svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;transition:transform .18s ease}
.text-cta:hover svg{transform:translateX(3px)}

/* 时间线：序号步骤 */
.tl-list{border-top:1px dashed var(--line)}
.tl-item{
  display:grid;grid-template-columns:44px 1fr;gap:20px;align-items:start;
  padding:22px 0;border-bottom:1px dashed var(--line);
}
.tl-num{
  width:44px;height:44px;border-radius:50%;background:var(--brand-600);color:#fff;
  display:grid;place-items:center;font-weight:700;font-size:15px;
}
.tl-body h3{font-size:17px;margin-bottom:6px}
.tl-body p{font-size:15px;color:var(--ink-600);margin-bottom:8px}
.tl-meta{display:flex;flex-wrap:wrap;gap:14px;font-size:13px;color:var(--ink-400)}
.tl-meta span{display:inline-flex;align-items:center;gap:6px}
.dot{width:6px;height:6px;border-radius:50%;background:var(--accent-500);display:inline-block}

/* 自检卡 */
.check-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#DCD3F7}
.check-card{padding:22px}
.icon-box{
  width:42px;height:42px;border-radius:12px;background:var(--brand-50);display:grid;place-items:center;margin-bottom:14px;
}
.icon-box svg{width:22px;height:22px;fill:none;stroke:var(--brand-600);stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.check-card h3{font-size:16.5px;margin-bottom:8px}
.check-card p{font-size:14.5px;color:var(--ink-600)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.tag{
  font-size:12.5px;padding:3px 11px;border-radius:var(--r-pill);
  background:var(--brand-50);color:var(--brand-600);
}
.tag.warn{background:#FFEDE8;color:#C4471F}
.tag.ok{background:#E4F8F3;color:#0E8A71}

/* 图文分栏 */
.split{display:grid;grid-template-columns:1fr 1fr;gap:38px;align-items:center}
.media{
  border-radius:var(--r-card);overflow:hidden;background:var(--brand-50);
  box-shadow:var(--sh-1);
}
.media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.point-list{display:grid;gap:14px;margin-top:20px}
.point-list li{display:grid;grid-template-columns:22px 1fr;gap:12px;align-items:start;font-size:15px}
.point-list svg{width:22px;height:22px;fill:none;stroke:var(--accent-500);stroke-width:2;stroke-linecap:round;stroke-linejoin:round;margin-top:4px}
.point-list b{color:var(--ink-900)}

/* 横向滚动卡 */
.scroll-row{
  display:flex;gap:16px;overflow-x:auto;padding:4px 4px 16px;
  scroll-snap-type:x mandatory;scrollbar-width:thin;
}
.scroll-row::-webkit-scrollbar{height:6px}
.scroll-row::-webkit-scrollbar-thumb{background:#D8D1EE;border-radius:99px}
.scroll-card{
  flex:0 0 276px;scroll-snap-align:start;overflow:hidden;
}
.scroll-card img{width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--brand-50)}
.scroll-card .body{padding:16px 18px 20px}
.scroll-card h3{font-size:16px;margin:10px 0 6px;transition:color .18s ease}
.scroll-card:hover h3{color:var(--brand-500)}
.scroll-card p{font-size:14px;color:var(--ink-600)}

/* 对比 */
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.compare-col{padding:24px}
.compare-col.highlight{background:var(--brand-50);border-color:#DCD3F7}
.compare-col h3{font-size:17px;margin-bottom:6px}
.compare-col .sub{font-size:13.5px;color:var(--ink-400);margin-bottom:18px}
.compare-row{margin-top:16px}
.compare-row .head{display:flex;justify-content:space-between;font-size:14px;margin-bottom:8px;color:var(--ink-900)}
.bar{height:10px;border-radius:var(--r-pill);background:var(--brand-50);overflow:hidden}
.compare-col.highlight .bar{background:#E3DCF8}
.bar i{display:block;height:100%;border-radius:var(--r-pill);background:var(--brand-600)}
.bar i.accent{background:var(--accent-500)}
.compare-note{
  margin-top:22px;padding:16px 20px;border-left:3px solid var(--accent-500);
  background:var(--surface);border-radius:0 var(--r-card) var(--r-card) 0;font-size:14.5px;
}

/* FAQ */
.faq-wrap{display:grid;gap:12px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;transition:border-color .18s ease,box-shadow .18s ease;
}
.faq-item.open{border-color:#D9CFF5;box-shadow:var(--sh-1)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;border:0;background:transparent;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink-900);
}
.faq-icon{
  width:26px;height:26px;flex:none;border-radius:50%;background:var(--brand-50);
  display:grid;place-items:center;transition:transform .18s ease,background .18s ease;
}
.faq-icon svg{width:14px;height:14px;fill:none;stroke:var(--brand-600);stroke-width:2.2;stroke-linecap:round}
.faq-item.open .faq-icon{transform:rotate(180deg);background:var(--brand-600)}
.faq-item.open .faq-icon svg{stroke:#fff}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .28s ease}
.faq-item.open .faq-a{grid-template-rows:1fr}
.faq-a > div{overflow:hidden}
.faq-a p{padding:0 20px 18px;font-size:15px;color:var(--ink-600)}

/* CTA 深色区 */
.cta-band{background:var(--dark);color:rgba(255,255,255,.78);position:relative;overflow:hidden}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:56px 56px;
}
.cta-grid{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start;padding:68px 0}
.cta-band h2{color:#fff;font-size:28px}
.cta-band .lead{margin-top:14px;font-size:15.5px;color:rgba(255,255,255,.75)}
.cta-points{margin-top:24px;display:grid;gap:14px}
.cta-points li{display:grid;grid-template-columns:22px 1fr;gap:12px;font-size:15px}
.cta-points svg{width:22px;height:22px;fill:none;stroke:var(--accent-500);stroke-width:2;stroke-linecap:round;stroke-linejoin:round;margin-top:4px}
.form-card{background:#fff;border-radius:var(--r-card);padding:26px;box-shadow:0 20px 44px -26px rgba(0,0,0,.6);position:sticky;top:96px}
.form-card h3{font-size:19px;margin-bottom:6px}
.form-card .hint{font-size:13.5px;color:var(--ink-400);margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;color:var(--ink-900);font-weight:600;margin-bottom:7px}
.field .req{color:var(--alert-500)}
.field input,.field select,.field textarea{
  width:100%;height:44px;padding:0 14px;border:1px solid var(--line);border-radius:var(--r-btn);
  background:#fff;outline:none;font-size:14.5px;transition:border-color .18s ease,box-shadow .18s ease;
}
.field textarea{height:110px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--brand-500);box-shadow:0 0 0 2px var(--brand-50);
}
.form-card .btn{width:100%;justify-content:center}
.privacy{margin-top:14px;font-size:12.5px;color:var(--ink-400);line-height:1.7}
.form-status{margin-top:14px;font-size:13.5px;padding:10px 14px;border-radius:var(--r-btn);display:none}
.form-status.ok{display:block;background:#E4F8F3;color:#0E8A71}
.form-status.err{display:block;background:#FFEDE8;color:#C4471F}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border:1px solid transparent;
  border-radius:var(--r-btn);font-size:15px;font-weight:600;
  transition:background .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.btn-primary{background:var(--brand-600);color:#fff}
.btn-primary:hover{background:var(--brand-500);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--brand-600)}
.btn-ghost:hover{background:var(--brand-50);color:var(--brand-600)}
.btn-light{background:#fff;color:var(--brand-600)}
.btn-light:hover{background:var(--brand-50);color:var(--brand-600);transform:translateY(-1px)}
.btn-line-light{background:transparent;border-color:rgba(255,255,255,.4);color:#fff}
.btn-line-light:hover{background:rgba(255,255,255,.12);border-color:#fff;color:#fff}

/* 页脚 */
.site-footer{background:var(--dark);color:rgba(255,255,255,.68);padding:56px 0 24px;font-size:14px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
.foot-brand .brand-mark{margin-bottom:14px}
.foot-brand .brand-text{color:#fff;font-size:17px;margin-bottom:12px}
.foot-brand p{font-size:14px;color:rgba(255,255,255,.62);max-width:330px}
.foot-contact{margin-top:18px;display:grid;gap:10px}
.foot-contact li{display:flex;align-items:center;gap:9px;font-size:13.5px}
.foot-contact svg{width:16px;height:16px;flex:none;fill:none;stroke:var(--accent-500);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.foot-col h4{color:#fff;font-size:15px;margin-bottom:16px}
.foot-col ul{display:grid;gap:11px}
.foot-col a{color:rgba(255,255,255,.66);font-size:14px}
.foot-col a:hover{color:var(--accent-500)}
.foot-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.55);
}
.foot-links{display:flex;gap:20px;flex-wrap:wrap}
.foot-links a{color:rgba(255,255,255,.6);font-size:13px}
.foot-links a:hover{color:var(--accent-500)}

/* 响应式 */
@media (max-width:1024px){
  .hot-keys{display:none}
  .menu-btn{display:grid}
  .search{max-width:none}
  .page-banner h1{font-size:32px}
  .check-grid{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:26px}
  .cta-grid{grid-template-columns:1fr;gap:30px;padding:56px 0}
  .form-card{position:static}
  .foot-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:768px){
  .section{padding:48px 0}
  .sec-title{font-size:22px}
  .page-banner h1{font-size:28px}
  .banner-inner{padding:44px 16px 40px;min-height:0}
  .banner-stats{gap:26px;margin-top:24px}
  .banner-stats li b{font-size:22px}
  .compare-grid{grid-template-columns:1fr}
  .tl-item{grid-template-columns:38px 1fr;gap:14px}
  .tl-num{width:38px;height:38px;font-size:14px}
  .cta-band h2{font-size:24px}
}
@media (max-width:520px){
  body{font-size:15.5px}
  .brand-sub{display:none}
  .brand-text{font-size:15px}
  .check-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .scroll-card{flex:0 0 250px}
  .btn{width:100%;justify-content:center}
  .sec-head{align-items:flex-start}
}