/* roulang page: index */
:root{
  --c-brand-900:#0B2B25;--c-brand-800:#0F3A31;--c-brand-700:#145045;--c-brand-600:#1B6B58;
  --c-brand-500:#24876D;--c-brand-300:#7FC3A9;--c-brand-100:#E3F1EA;
  --c-accent-600:#D2541F;--c-accent-500:#EC6A2B;--c-accent-300:#F7B187;--c-accent-100:#FDEBE0;
  --c-highlight:#F5C13D;
  --c-bg:#F7F5F0;--c-bg-alt:#EDF3EF;--c-surface:#FFFFFF;--c-line:#E2E0D9;--c-line-strong:#CFD6D1;
  --c-text:#14211E;--c-text-2:#40534D;--c-text-3:#6C7C77;--c-text-invert:#F2F7F4;
  --c-success:#1E8C5A;--c-warn:#E0A106;--c-error:#C8402F;
  --grad-brand:linear-gradient(118deg,#0F3A31 0%,#1B6B58 52%,#24876D 100%);
  --grad-accent:linear-gradient(118deg,#D2541F 0%,#EC6A2B 62%,#F5A45C 100%);
  --r-xs:8px;--r-sm:10px;--r-md:14px;--r-lg:20px;--r-xl:28px;--r-2xl:36px;--r-pill:999px;
  --sh-1:0 2px 8px rgba(11,43,37,.06);--sh-2:0 10px 28px rgba(11,43,37,.10);
  --sh-3:0 20px 48px rgba(11,43,37,.16);--sh-brand:0 10px 24px rgba(27,107,88,.26);
  --tr:0.24s cubic-bezier(.22,1,.36,1);
  --bs-primary:#1B6B58;--bs-body-bg:#F7F5F0;--bs-body-color:#14211E;
  --bs-body-font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --bs-link-color:#1B6B58;--bs-link-hover-color:#145045;--bs-border-radius:20px;
  --bs-focus-ring-color:rgba(36,135,109,.35);--bs-gutter-x:1.5rem;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;background:var(--c-bg);color:var(--c-text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:17px;line-height:1.85;font-weight:400;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--c-brand-600);text-decoration:none;transition:color var(--tr);}
a:hover{color:var(--c-brand-700);}
h1,h2,h3,h4{margin:0;line-height:1.25;color:var(--c-text);letter-spacing:0;}
h1{font-size:42px;font-weight:800;}
h2{font-size:32px;font-weight:700;}
h3{font-size:22px;font-weight:700;}
h4{font-size:18px;font-weight:700;}
p{margin:0 0 1.2em;color:var(--c-text-2);}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
:focus{outline:none;}
:focus-visible{outline:2px solid var(--c-brand-500);outline-offset:2px;border-radius:6px;}
.container{max-width:1200px;padding-left:24px;padding-right:24px;}
.btn{--bs-btn-border-radius:var(--r-pill);--bs-btn-focus-box-shadow:none;}
.card{--bs-card-border-radius:var(--r-lg);--bs-card-border-color:var(--c-line);--bs-card-bg:var(--c-surface);border:1px solid var(--c-line);}
.navbar{--bs-navbar-padding-y:0;}
.accordion{--bs-accordion-border-color:var(--c-line);--bs-accordion-btn-focus-box-shadow:none;--bs-accordion-active-bg:#fff;--bs-accordion-active-color:var(--c-brand-700);--bs-accordion-border-radius:var(--r-lg);}
.badge{--bs-badge-border-radius:var(--r-pill);}
.form-control,.form-select{
  min-height:48px;border-radius:var(--r-md);border:1px solid var(--c-line);background:#fff;
  color:var(--c-text);padding:0 16px;font-size:15px;transition:border-color var(--tr),box-shadow var(--tr);
}
textarea.form-control{min-height:120px;padding:12px 16px;line-height:1.7;}
.form-control:focus,.form-select:focus{border-color:var(--c-brand-600);box-shadow:0 0 0 4px rgba(27,107,88,.12);}
.form-control::placeholder{color:#9AA8A3;}

/* ---------- 顶部导航 ---------- */
.rk-header{
  position:sticky;top:0;z-index:1030;height:76px;
  background:rgba(247,245,240,.86);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--c-line);transition:box-shadow var(--tr);
}
.rk-header.is-scrolled{box-shadow:var(--sh-1);}
.rk-nav{height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px;}
.rk-logo{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.rk-logo-mark{
  width:36px;height:36px;border-radius:var(--r-pill);background:var(--grad-brand);
  display:flex;align-items:center;justify-content:center;box-shadow:var(--sh-1);
}
.rk-logo-mark svg{width:20px;height:20px;stroke:#fff;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;}
.rk-logo-text{font-size:18px;font-weight:700;color:var(--c-brand-700);white-space:nowrap;}
.rk-nav-list{display:flex;align-items:center;gap:28px;}
.rk-nav-link{
  position:relative;display:inline-block;padding:8px 12px;border-radius:var(--r-pill);
  font-size:15px;font-weight:500;color:var(--c-text-2);transition:color var(--tr),background var(--tr);
}
.rk-nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;border-radius:2px;
  background:var(--grad-brand);opacity:0;transform:scaleX(.4);transition:opacity var(--tr),transform var(--tr);
}
.rk-nav-link:hover{color:var(--c-brand-600);}
.rk-nav-link:hover::after{opacity:.7;transform:scaleX(1);}
.rk-nav-link.is-active{color:var(--c-brand-600);font-weight:600;background:rgba(27,107,88,.06);}
.rk-nav-link.is-active::after{opacity:1;transform:scaleX(1);height:3px;}
.rk-nav-right{display:flex;align-items:center;gap:32px;}
.rk-burger{
  display:none;width:40px;height:40px;border:0;border-radius:12px;background:var(--c-brand-100);
  cursor:pointer;position:relative;transition:background var(--tr);
}
.rk-burger:hover{background:#d5e9df;}
.rk-burger span{
  position:absolute;left:10px;right:10px;height:2px;border-radius:2px;background:var(--c-brand-700);
  transition:transform var(--tr),opacity var(--tr),top var(--tr);
}
.rk-burger span:nth-child(1){top:13px;}
.rk-burger span:nth-child(2){top:19px;}
.rk-burger span:nth-child(3){top:25px;}
.rk-burger.is-open span:nth-child(1){top:19px;transform:rotate(45deg);}
.rk-burger.is-open span:nth-child(2){opacity:0;}
.rk-burger.is-open span:nth-child(3){top:19px;transform:rotate(-45deg);}
.rk-mobile{
  display:none;position:absolute;left:0;right:0;top:100%;background:#fff;box-shadow:var(--sh-2);
  border-radius:0 0 20px 20px;padding:8px 16px 20px;
}
.rk-mobile.is-open{display:block;}
.rk-mobile a{
  display:flex;align-items:center;height:52px;border-bottom:1px solid var(--c-line);
  color:var(--c-text-2);font-size:16px;font-weight:500;
}
.rk-mobile a:hover,.rk-mobile a.is-active{color:var(--c-brand-600);font-weight:600;}
.rk-mobile .btn-rk{width:100%;justify-content:center;margin-top:16px;}

/* ---------- 按钮 ---------- */
.btn-rk{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border:0;border-radius:var(--r-pill);
  font-size:16px;font-weight:600;cursor:pointer;transition:all var(--tr);text-align:center;
}
.btn-rk-primary{background:var(--grad-brand);color:#fff;box-shadow:var(--sh-brand);}
.btn-rk-primary:hover{filter:brightness(1.06);transform:translateY(-1px);color:#fff;box-shadow:0 14px 30px rgba(27,107,88,.32);}
.btn-rk-primary:active{transform:translateY(0);box-shadow:var(--sh-1);}
.btn-rk-accent{background:var(--grad-accent);color:#fff;box-shadow:0 10px 24px rgba(210,84,31,.28);}
.btn-rk-accent:hover{filter:brightness(1.06);transform:translateY(-1px);color:#fff;}
.btn-rk-accent:active{transform:translateY(0);box-shadow:var(--sh-1);}
.btn-rk-outline{background:transparent;border:1.5px solid var(--c-brand-600);color:var(--c-brand-600);}
.btn-rk-outline:hover{background:rgba(27,107,88,.08);color:var(--c-brand-700);transform:translateY(-1px);}
.btn-rk-outline:active{transform:translateY(0);}
.btn-rk-ghost-light{background:transparent;border:1.5px solid rgba(255,255,255,.65);color:#fff;}
.btn-rk-ghost-light:hover{background:rgba(255,255,255,.14);color:#fff;transform:translateY(-1px);}
.btn-rk-ghost-light:active{transform:translateY(0);}
.btn-rk[disabled]{opacity:.55;cursor:not-allowed;transform:none!important;}
.btn-block{width:100%;height:52px;}
.link-more{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--c-brand-600);
}
.link-more svg{width:16px;height:16px;transition:transform var(--tr);}
.link-more:hover{color:var(--c-brand-700);text-decoration:underline;text-underline-offset:4px;}
.link-more:hover svg{transform:translateX(3px);}

/* ---------- 徽章 / 标签 ---------- */
.chip-cat{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--c-brand-100);color:var(--c-brand-700);font-size:12.5px;font-weight:600;
}
.chip-cat.on-media{
  position:absolute;left:14px;top:14px;background:rgba(255,255,255,.9);color:var(--c-brand-700);
  box-shadow:var(--sh-1);z-index:2;
}
.chip-tag{
  display:inline-flex;align-items:center;height:34px;padding:0 16px;border-radius:var(--r-pill);
  border:1px solid var(--c-line);background:#fff;color:var(--c-text-2);font-size:14px;
  transition:border-color var(--tr),color var(--tr);
}
.chip-tag:hover{border-color:var(--c-brand-600);color:var(--c-brand-600);}
.chip-status{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--c-accent-100);color:var(--c-accent-600);font-size:12.5px;font-weight:600;
}

/* ---------- 板块通用 ---------- */
.section{padding:88px 0;}
.section-alt{background:var(--c-bg-alt);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.section-head p{margin-top:10px;max-width:720px;font-size:16px;color:var(--c-text-3);}
.eyebrow{
  display:inline-block;margin-bottom:14px;font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--c-brand-600);text-transform:uppercase;
}
.num-square{
  width:40px;height:40px;border-radius:var(--r-sm);background:var(--grad-brand);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;
  font-variant-numeric:tabular-nums;flex:0 0 auto;
}
.check-list li{
  position:relative;padding-left:28px;margin-bottom:10px;font-size:15.5px;color:var(--c-text-2);line-height:1.8;
}
.check-list li:last-child{margin-bottom:0;}
.check-list li::before{
  content:"";position:absolute;left:0;top:8px;width:16px;height:16px;border-radius:50%;
  border:1.5px solid var(--c-brand-300);background:
    radial-gradient(circle at center,var(--c-brand-600) 0 3px,transparent 3.5px);
}

/* ---------- Hero ---------- */
.hero-section{padding:32px 0 0;}
.hero-card{
  position:relative;overflow:hidden;border-radius:var(--r-2xl);padding:72px 64px;
  background:var(--grad-brand);color:#fff;
}
.hero-card::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    repeating-linear-gradient(45deg,rgba(255,255,255,.04) 0 1px,transparent 1px 14px),
    radial-gradient(circle at 88% 8%,rgba(255,255,255,.10),transparent 52%);
}
.hero-inner{position:relative;z-index:1;}
.hero-pill{
  display:inline-flex;align-items:center;height:32px;padding:0 16px;border-radius:var(--r-pill);
  border:1px solid rgba(255,255,255,.42);color:rgba(255,255,255,.94);font-size:13.5px;font-weight:600;
  margin-bottom:22px;
}
.hero-title{color:#fff;font-size:42px;font-weight:800;max-width:640px;}
.hero-sub{margin-top:20px;max-width:560px;font-size:17px;line-height:1.8;color:rgba(242,247,244,.86);}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-trust{display:flex;flex-wrap:wrap;gap:24px;margin-top:34px;}
.hero-trust li{display:flex;align-items:center;gap:8px;font-size:14px;color:rgba(242,247,244,.86);}
.hero-trust svg{width:18px;height:18px;stroke:var(--c-highlight);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;}
.hero-media{position:relative;border-radius:var(--r-xl);overflow:hidden;border:1px solid rgba(255,255,255,.18);}
.hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.hero-float{
  position:absolute;left:-18px;bottom:-18px;background:#fff;border-radius:var(--r-lg);
  box-shadow:var(--sh-3);padding:18px 20px;display:flex;gap:26px;align-items:center;z-index:2;
}
.hero-float .num{font-size:30px;font-weight:800;color:var(--c-brand-600);line-height:1.1;font-variant-numeric:tabular-nums;}
.hero-float .lbl{font-size:13px;color:var(--c-text-3);line-height:1.5;}
.hero-float-note{
  position:absolute;left:24px;right:24px;bottom:-46px;font-size:13px;color:rgba(242,247,244,.7);
}

/* ---------- 痛点区 ---------- */
.pain-title{position:sticky;top:104px;}
.pain-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  padding:26px;height:100%;transition:transform var(--tr),box-shadow var(--tr),border-color var(--tr);
}
.pain-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--c-brand-300);}
.pain-card h4{margin:16px 0 10px;font-size:17px;font-weight:600;color:var(--c-text);}
.pain-card p{font-size:15px;color:var(--c-text-3);}

/* ---------- 方案区 ---------- */
.feature-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-xl);
  padding:40px;transition:transform var(--tr),box-shadow var(--tr),border-color var(--tr);
}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--c-brand-300);}
.feature-card h3{margin:18px 0 14px;}
.feature-card p{font-size:16px;color:var(--c-text-3);}
.feature-media{border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--c-line);}
.feature-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform var(--tr);}
.feature-card:hover .feature-media img{transform:scale(1.03);}
.mini-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  padding:0 0 24px;height:100%;overflow:hidden;display:flex;flex-direction:column;
  transition:transform var(--tr),box-shadow var(--tr),border-color var(--tr);
}
.mini-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--c-brand-300);}
.mini-card .mini-media{overflow:hidden;border-bottom:1px solid var(--c-line);}
.mini-card .mini-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform var(--tr);}
.mini-card:hover .mini-media img{transform:scale(1.03);}
.mini-body{padding:22px 24px 0;flex:1 1 auto;}
.mini-body h4{font-size:18px;margin-bottom:12px;}

/* ---------- 数据带 ---------- */
.stat-band{position:relative;overflow:hidden;background:var(--c-brand-900);padding:88px 0;}
.stat-band::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(circle at 82% 0%,rgba(36,135,109,.55),transparent 58%),
    repeating-linear-gradient(45deg,rgba(255,255,255,.04) 0 1px,transparent 1px 14px);
}
.stat-band .container{position:relative;z-index:1;}
.stat-band h2{color:#fff;}
.stat-band .lead{color:rgba(242,247,244,.78);max-width:720px;margin-top:16px;font-size:16px;}
.stat-card{
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);border-radius:var(--r-lg);
  padding:26px 24px;height:100%;
}
.stat-card .num{font-size:36px;font-weight:800;color:var(--c-highlight);line-height:1.1;font-variant-numeric:tabular-nums;}
.stat-card .unit{font-size:14px;font-weight:600;color:#fff;margin-left:4px;}
.stat-card .desc{margin-top:10px;font-size:13.5px;color:rgba(242,247,244,.72);line-height:1.7;}
.stat-foot{margin-top:32px;display:flex;flex-wrap:wrap;align-items:center;gap:20px;}
.stat-foot span{font-size:13.5px;color:rgba(242,247,244,.66);}

/* ---------- CTA 横卡 ---------- */
.cta-bar{
  background:var(--c-bg-alt);border:1px solid var(--c-line);border-radius:var(--r-xl);
  padding:32px 36px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
}
.cta-bar h3{font-size:22px;}
.cta-bar p{margin-top:8px;font-size:15px;color:var(--c-text-3);}

/* ---------- 表单 ---------- */
.form-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-xl);padding:32px;
}
.form-row{margin-bottom:18px;}
.form-row label{display:block;margin-bottom:8px;font-size:14px;font-weight:600;color:var(--c-text-2);}
.req{color:var(--c-accent-500);}
.rk-check{display:flex;align-items:flex-start;gap:10px;margin:6px 0 20px;font-size:13px;color:var(--c-text-3);cursor:pointer;}
.rk-check input{
  appearance:none;-webkit-appearance:none;width:20px;height:20px;flex:0 0 auto;margin-top:2px;
  border:1.5px solid var(--c-line-strong);border-radius:var(--r-xs);background:#fff;cursor:pointer;
  transition:background var(--tr),border-color var(--tr);
}
.rk-check input:checked{background:var(--grad-brand);border-color:var(--c-brand-600);}
.rk-check input:checked::after{
  content:"";display:block;width:5px;height:10px;margin:2px auto 0;border:solid #fff;
  border-width:0 2px 2px 0;transform:rotate(45deg);
}
.form-tip{margin-top:12px;font-size:13px;color:var(--c-text-3);min-height:20px;}
.form-tip.is-ok{color:var(--c-success);}
.side-notes li{
  position:relative;padding-left:26px;margin-bottom:14px;font-size:15px;color:var(--c-text-2);
}
.side-notes li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;background:var(--c-brand-500);
}

/* ---------- 资讯列表 ---------- */
.news-card{
  display:flex;flex-direction:column;height:100%;background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:var(--r-lg);overflow:hidden;
  transition:transform var(--tr),box-shadow var(--tr),border-color var(--tr);color:inherit;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--c-brand-300);color:inherit;}
.news-cover{position:relative;overflow:hidden;}
.news-cover img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform var(--tr);}
.news-card:hover .news-cover img{transform:scale(1.03);}
.news-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1 1 auto;}
.news-body h3{
  font-size:18px;margin-bottom:12px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-body p{
  font-size:15px;color:var(--c-text-3);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  margin-top:auto;padding-top:16px;display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--c-text-3);
}
.news-meta svg{width:16px;height:16px;stroke:var(--c-brand-600);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform var(--tr);}
.news-card:hover .news-meta svg{transform:translateX(3px);}
.empty-state{
  border:1.5px dashed var(--c-line-strong);border-radius:var(--r-lg);padding:48px 24px;text-align:center;
}
.empty-state svg{width:48px;height:48px;stroke:var(--c-brand-600);opacity:.3;fill:none;stroke-width:1.6;margin-bottom:16px;}
.empty-state p{font-size:15px;color:var(--c-text-3);margin-bottom:20px;}

/* ---------- FAQ ---------- */
.faq-item{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-lg);margin-bottom:12px;overflow:hidden;
  transition:box-shadow var(--tr),border-color var(--tr);
}
.faq-item:hover{border-color:var(--c-brand-300);}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;padding:18px 24px;background:#fff;border:0;
  text-align:left;cursor:pointer;font-size:17px;font-weight:600;color:var(--c-text);font-family:inherit;
  transition:color var(--tr);
}
.faq-q:hover{color:var(--c-brand-700);}
.faq-q .idx{
  width:26px;height:26px;flex:0 0 auto;border-radius:8px;background:var(--c-brand-100);color:var(--c-brand-700);
  display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;font-variant-numeric:tabular-nums;
}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq-a p{padding:0 24px 22px 64px;font-size:15px;color:var(--c-text-3);}
.faq-item.is-open{border-left:4px solid var(--c-brand-600);box-shadow:var(--sh-1);}
.faq-item.is-open .faq-q{padding-left:20px;}

/* ---------- 隐私说明 ---------- */
.privacy-card{
  background:var(--c-bg-alt);border:1px solid var(--c-line);border-radius:var(--r-xl);padding:32px;
}
.privacy-card h3{font-size:20px;margin-bottom:14px;}
.privacy-card p{font-size:14px;color:var(--c-text-3);}
.privacy-points{display:flex;flex-wrap:wrap;gap:20px;margin-top:22px;}
.privacy-points li{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--c-text-2);}
.privacy-points svg{width:18px;height:18px;stroke:var(--c-brand-600);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;}

/* ---------- 页脚 ---------- */
.rk-footer{background:var(--c-brand-900);color:var(--c-text-invert);padding:64px 0 28px;position:relative;}
.rk-footer::before{content:"";position:absolute;left:0;right:0;top:0;height:4px;background:var(--grad-brand);}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand .rk-logo-text{color:#fff;font-size:18px;}
.footer-desc{font-size:14px;color:rgba(242,247,244,.72);line-height:1.9;max-width:320px;}
.footer-col h4{font-size:15px;font-weight:700;color:var(--c-text-invert);margin-bottom:18px;}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:rgba(242,247,244,.72);}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px;}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(242,247,244,.14);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13px;color:rgba(242,247,244,.5);
}
.footer-bottom a{color:rgba(242,247,244,.5);}
.footer-bottom a:hover{color:#fff;}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:50%;border:0;
  background:var(--grad-brand);box-shadow:var(--sh-2);cursor:pointer;
  display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;
  transition:opacity var(--tr),visibility var(--tr),transform var(--tr);z-index:1020;
}
.to-top.is-on{opacity:1;visibility:visible;}
.to-top:hover{transform:translateY(-2px);}
.to-top svg{width:20px;height:20px;stroke:#fff;fill:none;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;}

/* ---------- 弹层 ---------- */
.modal-backdrop{background:rgba(11,43,37,.55);}
.modal-backdrop.show{opacity:1;}
.modal-content{
  border:0;border-radius:var(--r-xl);overflow:hidden;background:#fff;box-shadow:var(--sh-3);
  position:relative;
}
.modal-content::before{content:"";position:absolute;left:0;right:0;top:0;height:4px;background:var(--grad-accent);}
.modal-dialog{max-width:520px;}
.modal-body-rk{padding:36px 32px 32px;}
.modal-body-rk h3{font-size:22px;font-weight:700;margin-bottom:10px;}
.modal-body-rk p{font-size:14.5px;color:var(--c-text-3);margin-bottom:24px;}
.modal-close{
  position:absolute;right:14px;top:14px;width:36px;height:36px;border:0;border-radius:10px;background:transparent;
  font-size:20px;line-height:1;color:var(--c-text-3);cursor:pointer;transition:background var(--tr),color var(--tr);z-index:3;
}
.modal-close:hover{background:#F1F0EB;color:var(--c-text);}
.modal.fade .modal-dialog{transform:translateY(16px);transition:transform .24s ease,opacity .24s ease;}
.modal.show .modal-dialog{transform:translateY(0);}

/* ---------- 响应式 ---------- */
@media (max-width:1399px){
  .container{max-width:1200px;}
}
@media (max-width:1199px){
  h1,.hero-title{font-size:38px;}
  h2{font-size:28px;}
  .hero-card{padding:56px 44px;}
}
@media (max-width:991px){
  .rk-header,.rk-nav{height:64px;}
  .rk-nav-list,.rk-nav-right .btn-rk{display:none;}
  .rk-burger{display:block;}
  .hero-card{padding:48px 36px;}
  .hero-title{font-size:34px;}
  .hero-float{position:static;margin-top:16px;left:auto;bottom:auto;}
  .hero-float-note{position:static;color:rgba(242,247,244,.72);margin-top:12px;left:auto;right:auto;bottom:auto;}
  .pain-title{position:static;margin-bottom:28px;}
  .section{padding:72px 0;}
  .stat-band{padding:72px 0;}
}
@media (max-width:767px){
  body{font-size:16px;}
  h1,.hero-title{font-size:28px;}
  h2{font-size:24px;}
  h3{font-size:19px;}
  h4{font-size:17px;}
  .container{padding-left:16px;padding-right:16px;}
  .section{padding:56px 0;}
  .stat-band{padding:56px 0;}
  .hero-section{padding:20px 0 0;}
  .hero-card{padding:32px 24px;border-radius:var(--r-xl);}
  .hero-sub{font-size:16px;}
  .hero-actions{gap:12px;}
  .hero-actions .btn-rk{width:100%;}
  .hero-trust{gap:14px;flex-direction:column;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:28px;}
  .feature-card{padding:26px 22px;}
  .cta-bar{padding:24px 22px;}
  .cta-bar .btn-rk{width:100%;}
  .form-card{padding:24px 20px;}
  .news-body{padding:18px 20px 20px;}
  .faq-a p{padding-left:24px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .form-card + .side-notes{margin-top:28px;}
}
@media (max-width:575px){
  .rk-mobile a{height:52px;}
  .stat-card .num{font-size:30px;}
  .hero-float{gap:18px;padding:14px 16px;}
  .modal-dialog{margin:0;max-width:100%;}
  .modal-content{border-radius:24px 24px 0 0;}
  .modal-dialog-centered{align-items:flex-end;min-height:calc(100% - 0px);}
  .modal-body-rk{padding:30px 22px 24px;}
  .to-top{right:16px;bottom:16px;}
}

/* roulang page: article */
:root{
  --c-brand-900:#0B2B25;
  --c-brand-800:#0F3A31;
  --c-brand-700:#145045;
  --c-brand-600:#1B6B58;
  --c-brand-500:#24876D;
  --c-brand-300:#7FC3A9;
  --c-brand-100:#E3F1EA;
  --c-accent-600:#D2541F;
  --c-accent-500:#EC6A2B;
  --c-accent-300:#F7B187;
  --c-accent-100:#FDEBE0;
  --c-highlight:#F5C13D;
  --c-bg:#F7F5F0;
  --c-bg-alt:#EDF3EF;
  --c-surface:#FFFFFF;
  --c-line:#E2E0D9;
  --c-line-strong:#CFD6D1;
  --c-text:#14211E;
  --c-text-2:#40534D;
  --c-text-3:#6C7C77;
  --c-text-invert:#F2F7F4;
  --c-ok:#1E8C5A;
  --c-warn:#E0A106;
  --c-err:#C8402F;
  --grad-brand:linear-gradient(118deg,#0F3A31 0%,#1B6B58 52%,#24876D 100%);
  --grad-accent:linear-gradient(118deg,#D2541F 0%,#EC6A2B 62%,#F5A45C 100%);
  --r-xs:8px; --r-sm:10px; --r-md:14px; --r-lg:20px; --r-xl:28px; --r-2xl:36px; --r-pill:999px;
  --sh-1:0 2px 8px rgba(11,43,37,.06);
  --sh-2:0 10px 28px rgba(11,43,37,.10);
  --sh-3:0 20px 48px rgba(11,43,37,.16);
  --sh-brand:0 10px 24px rgba(27,107,88,.26);
  --ease:0.24s cubic-bezier(.22,1,.36,1);

  --bs-primary:#1B6B58;
  --bs-primary-rgb:27,107,88;
  --bs-body-bg:#F7F5F0;
  --bs-body-color:#14211E;
  --bs-body-font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --bs-link-color:#1B6B58;
  --bs-link-hover-color:#145045;
  --bs-border-radius:14px;
  --bs-focus-ring-color:rgba(27,107,88,.35);
  --bs-gutter-x:1.5rem;
}

*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--c-brand-600);text-decoration:none;transition:color var(--ease);}
a:hover{color:var(--c-brand-700);}
h1,h2,h3,h4{line-height:1.25;margin:0;font-weight:700;color:var(--c-text);}
p{margin:0 0 1.1em;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--c-brand-500);outline-offset:2px;border-radius:6px;}
.container{max-width:1200px;padding-left:24px;padding-right:24px;margin:0 auto;}

/* ---------- header ---------- */
.rk-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(247,245,240,.88);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow var(--ease),background var(--ease);
}
.rk-header.is-scrolled{box-shadow:var(--sh-1);background:rgba(247,245,240,.96);}
.rk-nav{display:flex;align-items:center;justify-content:space-between;height:76px;gap:24px;}
.rk-logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.rk-logo-mark{
  width:36px;height:36px;border-radius:var(--r-sm);
  background:var(--grad-brand);
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-1);
}
.rk-logo-mark svg{width:22px;height:22px;fill:none;stroke:#fff;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}
.rk-logo-text{font-size:18px;font-weight:700;color:var(--c-brand-700);letter-spacing:.2px;}
.rk-nav-list{display:flex;align-items:center;gap:28px;margin:0 0 0 auto;}
.rk-nav-link{
  position:relative;display:inline-block;padding:8px 10px;
  font-size:15px;font-weight:500;color:var(--c-text-2);border-radius:var(--r-pill);
  transition:color var(--ease),background var(--ease);
}
.rk-nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:var(--r-pill);
  background:var(--grad-brand);transform:scaleX(0);transform-origin:center;transition:transform var(--ease);
}
.rk-nav-link:hover{color:var(--c-brand-600);}
.rk-nav-link:hover::after{transform:scaleX(1);}
.rk-nav-link.is-active{
  color:var(--c-brand-600);font-weight:600;background:rgba(27,107,88,.06);
}
.rk-nav-link.is-active::after{height:3px;transform:scaleX(1);}
.rk-nav-right{display:flex;align-items:center;gap:18px;margin-left:32px;}
.btn-rk{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border:0;border-radius:var(--r-pill);
  font-size:16px;font-weight:600;cursor:pointer;
  transition:transform var(--ease),box-shadow var(--ease),filter var(--ease),background var(--ease),color var(--ease);
}
.btn-rk:active{transform:translateY(0);box-shadow:none;}
.btn-rk:disabled{opacity:.55;cursor:not-allowed;}
.btn-rk-primary{background:var(--grad-brand);color:#fff;box-shadow:var(--sh-brand);}
.btn-rk-primary:hover{filter:brightness(1.07);transform:translateY(-1px);color:#fff;}
.btn-rk-ghost{background:transparent;color:var(--c-brand-600);border:1.5px solid var(--c-brand-600);}
.btn-rk-ghost:hover{background:rgba(27,107,88,.08);color:var(--c-brand-700);transform:translateY(-1px);}
.btn-rk-outline-light{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.7);}
.btn-rk-outline-light:hover{background:rgba(255,255,255,.14);color:#fff;transform:translateY(-1px);}
.btn-rk-accent{background:var(--grad-accent);color:#fff;box-shadow:0 10px 24px rgba(210,84,31,.28);}
.btn-rk-accent:hover{filter:brightness(1.06);transform:translateY(-1px);color:#fff;}
.btn-rk-sm{height:40px;padding:0 20px;font-size:14px;}
.btn-link-rk{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--c-brand-600);
}
.btn-link-rk span.ar{transition:transform var(--ease);}
.btn-link-rk:hover span.ar{transform:translateX(3px);}
.btn-link-rk:hover{text-decoration:underline;text-underline-offset:4px;}
.rk-burger{
  display:none;width:40px;height:40px;border:0;border-radius:12px;background:var(--c-brand-100);
  align-items:center;justify-content:center;flex-direction:column;gap:4px;cursor:pointer;
}
.rk-burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--c-brand-600);transition:transform var(--ease),opacity var(--ease);}
.rk-burger.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.rk-burger.is-open span:nth-child(2){opacity:0;}
.rk-burger.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.rk-mobile{
  display:none;background:#fff;border-top:1px solid var(--c-line);
  border-radius:0 0 var(--r-lg) var(--r-lg);box-shadow:var(--sh-2);padding:8px 24px 20px;
}
.rk-mobile.is-open{display:block;}
.rk-mobile a{
  display:block;height:52px;line-height:52px;color:var(--c-text-2);font-size:16px;font-weight:500;
  border-bottom:1px solid var(--c-line);
}
.rk-mobile a:hover,.rk-mobile a.is-active{color:var(--c-brand-600);font-weight:600;}
.rk-mobile .btn-rk{width:100%;margin-top:16px;}

/* ---------- breadcrumb ---------- */
.rk-crumb{padding:20px 0 0;font-size:14px;color:var(--c-text-3);}
.rk-crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.rk-crumb li{display:inline-flex;align-items:center;gap:8px;color:var(--c-text-3);}
.rk-crumb li+li::before{content:"›";color:var(--c-line-strong);}
.rk-crumb a{color:var(--c-text-3);}
.rk-crumb a:hover{color:var(--c-brand-600);}
.rk-crumb .cur{color:var(--c-text-2);font-weight:600;max-width:320px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ---------- article head ---------- */
.article-head{padding:28px 0 8px;max-width:860px;}
.rk-badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--c-brand-100);color:var(--c-brand-700);font-size:13px;font-weight:600;
}
.rk-badge-accent{background:var(--c-accent-100);color:var(--c-accent-600);}
.article-head h1{font-size:34px;font-weight:800;margin:16px 0 14px;}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:15px;color:var(--c-text-3);}
.article-meta .dot{color:var(--c-line-strong);}
.article-cover{
  margin:24px 0 0;border-radius:var(--r-xl);overflow:hidden;border:1px solid var(--c-line);
  aspect-ratio:21/9;background:var(--grad-brand);
}
.article-cover img{width:100%;height:100%;object-fit:cover;object-position:center 35%;}

/* ---------- article layout ---------- */
.article-wrap{padding:36px 0 88px;}
.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;align-items:start;}
.article-main{min-width:0;max-width:820px;}
.article-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-xl);
  padding:40px 44px;box-shadow:var(--sh-1);
}
.article-placeholder{min-height:220px;}

/* long-form typography */
.rk-article-body{font-size:17px;line-height:1.9;color:var(--c-text-2);}
.rk-article-body p{margin:0 0 1.25em;}
.rk-article-body h2{
  position:relative;font-size:23px;font-weight:700;color:var(--c-text);
  margin:44px 0 18px;padding-left:16px;
}
.rk-article-body h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:var(--r-pill);background:var(--c-brand-600);
}
.rk-article-body h3{font-size:19px;font-weight:700;color:var(--c-text);margin:30px 0 12px;}
.rk-article-body h4{font-size:17px;font-weight:700;color:var(--c-text);margin:24px 0 10px;}
.rk-article-body ul,.rk-article-body ol{margin:0 0 1.3em;padding-left:0;}
.rk-article-body ul li{position:relative;padding-left:20px;margin-bottom:10px;}
.rk-article-body ul li::before{
  content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;border-radius:50%;
  background:var(--c-brand-500);
}
.rk-article-body ol{counter-reset:rknum;}
.rk-article-body ol li{position:relative;padding-left:30px;margin-bottom:10px;counter-increment:rknum;}
.rk-article-body ol li::before{
  content:counter(rknum);position:absolute;left:0;top:.24em;
  width:20px;height:20px;border-radius:8px;background:var(--c-brand-100);color:var(--c-brand-700);
  font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;
}
.rk-article-body blockquote{
  margin:24px 0;padding:20px 24px;background:var(--c-brand-100);
  border-left:4px solid var(--c-brand-600);border-radius:var(--r-lg);color:var(--c-text-2);
}
.rk-article-body blockquote p:last-child{margin-bottom:0;}
.rk-article-body img{border-radius:var(--r-lg);margin:24px 0 8px;}
.rk-article-body figure{margin:24px 0;}
.rk-article-body figcaption,.rk-article-body .caption{
  font-size:13px;color:var(--c-text-3);text-align:center;margin-top:6px;
}
.rk-article-body table{
  width:100%;border-collapse:separate;border-spacing:0;margin:24px 0;font-size:15px;
  border:1px solid var(--c-line);border-radius:var(--r-lg);overflow:hidden;
}
.rk-article-body thead th{background:var(--c-brand-100);color:var(--c-brand-700);font-weight:600;}
.rk-article-body th,.rk-article-body td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--c-line);}
.rk-article-body tbody tr:nth-child(even) td{background:#FAFAF8;}
.rk-article-body tbody tr:last-child td{border-bottom:0;}
.rk-article-body a{color:var(--c-brand-600);text-decoration:underline;text-underline-offset:3px;}
.rk-article-body strong{color:var(--c-text);font-weight:600;}

/* ---------- sidebar ---------- */
.article-side{position:sticky;top:100px;display:grid;gap:20px;}
.side-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  padding:24px;transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.side-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--c-brand-300);}
.side-card h3{font-size:16px;font-weight:700;margin-bottom:14px;}
.side-list li+li{margin-top:10px;}
.side-list a{font-size:15px;color:var(--c-text-2);display:flex;gap:8px;align-items:flex-start;}
.side-list a::before{content:"›";color:var(--c-brand-500);font-weight:700;line-height:1.6;}
.side-list a:hover{color:var(--c-brand-600);}
.side-cta{
  background:var(--c-bg-alt);border:1px solid var(--c-line);border-radius:var(--r-lg);padding:24px;
}
.side-cta p{font-size:14px;color:var(--c-text-3);margin:8px 0 16px;}
.side-cta .btn-rk{width:100%;}
.rk-chips{display:flex;flex-wrap:wrap;gap:10px;}
.rk-chip{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:var(--r-pill);
  border:1px solid var(--c-line);background:#fff;font-size:13px;color:var(--c-text-2);
  transition:border-color var(--ease),color var(--ease);
}
.rk-chip:hover{border-color:var(--c-brand-500);color:var(--c-brand-600);}

/* ---------- tail blocks ---------- */
.tail-block{margin-top:40px;}
.tail-title{font-size:20px;font-weight:700;margin-bottom:18px;}
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.rel-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--c-brand-300);}
.rel-media{aspect-ratio:16/10;overflow:hidden;background:var(--grad-brand);}
.rel-media img{width:100%;height:100%;object-fit:cover;transition:transform var(--ease);}
.rel-card:hover .rel-media img{transform:scale(1.03);}
.rel-body{padding:18px 20px 20px;}
.rel-body h3{font-size:17px;font-weight:700;margin-bottom:8px;color:var(--c-text);}
.rel-body p{font-size:14px;color:var(--c-text-3);margin:0 0 12px;}
.rel-meta{font-size:13px;color:var(--c-text-3);display:flex;align-items:center;gap:8px;}

.cta-card{
  margin-top:40px;border-radius:var(--r-xl);padding:36px 40px;
  background:var(--c-bg-alt);border:1px solid var(--c-line);
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-card h3{font-size:22px;font-weight:700;margin-bottom:8px;}
.cta-card p{margin:0;font-size:15px;color:var(--c-text-3);max-width:560px;}

.pn-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:40px;}
.pn-card{
  display:block;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  padding:20px 24px;transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.pn-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--c-brand-500);}
.pn-label{font-size:13px;color:var(--c-text-3);display:block;margin-bottom:6px;}
.pn-title{font-size:16px;font-weight:600;color:var(--c-text);}
.pn-card.next{text-align:right;}

/* ---------- footer ---------- */
.rk-footer{
  position:relative;background:var(--c-brand-900);color:var(--c-text-invert);
  padding-top:64px;padding-bottom:28px;margin-top:24px;
}
.rk-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--grad-brand);
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .rk-logo-text{color:var(--c-text-invert);}
.footer-desc{font-size:14px;line-height:1.9;color:rgba(242,247,244,.72);max-width:340px;}
.footer-col h4{font-size:15px;font-weight:700;color:var(--c-text-invert);margin-bottom:16px;}
.footer-col ul li+li{margin-top:10px;}
.footer-col a{font-size:14px;color:rgba(242,247,244,.72);text-decoration:none;}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px;}
.footer-bottom{
  margin-top:48px;padding-top:20px;border-top:1px solid rgba(242,247,244,.14);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(242,247,244,.5);
}

/* ---------- to top ---------- */
.rk-totop{
  position:fixed;right:24px;bottom:24px;width:48px;height:48px;border:0;border-radius:50%;
  background:var(--grad-brand);color:#fff;box-shadow:var(--sh-2);cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transform:translateY(10px);transition:all var(--ease);z-index:1040;
}
.rk-totop.is-show{opacity:1;visibility:visible;transform:translateY(0);}
.rk-totop:hover{filter:brightness(1.08);}

/* ---------- modal ---------- */
.modal-backdrop.show{opacity:.55;background:#0B2B25;}
.modal-content{
  border:0;border-radius:var(--r-xl);box-shadow:var(--sh-3);
  position:relative;overflow:hidden;
}
.modal-content::before{
  content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--grad-accent);
}
.modal-header{border-bottom:0;padding:26px 28px 6px;}
.modal-title{font-size:22px;font-weight:700;}
.modal-body{padding:10px 28px 28px;}
.rk-close{
  width:36px;height:36px;border:0;border-radius:10px;background:transparent;color:var(--c-text-3);
  font-size:18px;line-height:1;cursor:pointer;transition:background var(--ease);
}
.rk-close:hover{background:var(--c-bg-alt);color:var(--c-text);}
.rk-field{margin-bottom:18px;}
.rk-field label{display:block;font-size:14px;font-weight:600;color:var(--c-text-2);margin-bottom:8px;}
.rk-field .req{color:var(--c-brand-600);}
.form-control,.form-select{
  height:48px;border-radius:var(--r-md);border:1px solid var(--c-line);background:#fff;
  padding:0 16px;font-size:15px;color:var(--c-text);box-shadow:none;
}
.form-control:focus,.form-select:focus{
  border-color:var(--c-brand-600);box-shadow:0 0 0 4px rgba(27,107,88,.12);outline:none;
}
textarea.form-control{height:120px;padding:12px 16px;resize:vertical;}
.rk-check{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--c-text-3);}
.rk-check input{width:20px;height:20px;margin-top:2px;accent-color:var(--c-brand-600);flex:0 0 auto;}
.rk-submit{width:100%;height:52px;}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .article-grid{grid-template-columns:minmax(0,1fr) 280px;gap:32px;}
  .article-card{padding:34px 30px;}
}
@media (max-width:991px){
  .rk-nav{height:64px;}
  .rk-nav-list,.rk-nav-right .btn-rk{display:none;}
  .rk-burger{display:flex;}
  .article-grid{grid-template-columns:1fr;}
  .article-side{position:static;}
  .rel-grid{grid-template-columns:1fr;}
  .article-head h1{font-size:28px;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .container{padding-left:16px;padding-right:16px;}
  .article-wrap{padding:24px 0 56px;}
  .article-card{padding:24px 20px;border-radius:var(--r-lg);}
  .rk-article-body h2{font-size:20px;margin:34px 0 14px;}
  .rk-article-body h3{font-size:18px;}
  .cta-card{padding:26px 22px;}
  .pn-grid{grid-template-columns:1fr;}
  .pn-card.next{text-align:left;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .article-head h1{font-size:25px;}
}
@media (max-width:575px){
  .rk-logo-text{font-size:16px;}
  .article-cover{aspect-ratio:16/10;}
  .btn-rk{width:100%;}
  .cta-card .btn-rk{width:100%;}
  .rk-totop{right:16px;bottom:16px;}
}

/* roulang page: category1 */
:root{
  --c-brand-900:#0B2B25;--c-brand-800:#0F3A31;--c-brand-700:#145045;--c-brand-600:#1B6B58;
  --c-brand-500:#24876D;--c-brand-300:#7FC3A9;--c-brand-100:#E3F1EA;
  --c-accent-600:#D2541F;--c-accent-500:#EC6A2B;--c-accent-300:#F7B187;--c-accent-100:#FDEBE0;
  --c-highlight:#F5C13D;
  --c-bg:#F7F5F0;--c-bg-alt:#EDF3EF;--c-surface:#FFFFFF;--c-line:#E2E0D9;--c-line-strong:#CFD6D1;
  --c-text:#14211E;--c-text-2:#40534D;--c-text-3:#6C7C77;--c-text-invert:#F2F7F4;
  --c-ok:#1E8C5A;--c-warn:#E0A106;--c-err:#C8402F;
  --grad-brand:linear-gradient(118deg,#0F3A31 0%,#1B6B58 52%,#24876D 100%);
  --grad-accent:linear-gradient(118deg,#D2541F 0%,#EC6A2B 62%,#F5A45C 100%);
  --r-xs:8px;--r-sm:10px;--r-md:14px;--r-lg:20px;--r-xl:28px;--r-2xl:36px;--r-pill:999px;
  --sh-1:0 2px 8px rgba(11,43,37,.06);--sh-2:0 10px 28px rgba(11,43,37,.10);
  --sh-3:0 20px 48px rgba(11,43,37,.16);--sh-brand:0 10px 24px rgba(27,107,88,.26);
  --ease:0.24s cubic-bezier(.22,1,.36,1);
  --bs-primary:#1B6B58;--bs-body-bg:#F7F5F0;--bs-body-color:#14211E;
  --bs-body-font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --bs-link-color:#1B6B58;--bs-link-hover-color:#145045;--bs-border-radius:14px;
  --bs-focus-ring-color:rgba(27,107,88,.28);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--c-bg);color:var(--c-text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:17px;line-height:1.85;font-weight:400;
}
img{max-width:100%;display:block}
a{color:var(--c-brand-600);text-decoration:none;transition:color var(--ease),border-color var(--ease),background var(--ease)}
a:hover{color:var(--c-brand-700)}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--c-brand-500);outline-offset:2px;border-radius:6px}
h1,h2,h3,h4{margin:0;line-height:1.25;color:var(--c-text)}
h1{font-size:42px;font-weight:800}
h2{font-size:32px;font-weight:700}
h3{font-size:22px;font-weight:700}
h4{font-size:18px;font-weight:700}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
.container{width:100%;max-width:1200px;padding-left:24px;padding-right:24px;margin:0 auto;--bs-gutter-x:1.5rem}
.row{--bs-gutter-x:1.5rem}
.section{padding:88px 0}
.section-alt{background:var(--c-bg-alt)}
.section-head{max-width:760px;margin-bottom:44px}
.section-head h2{margin-bottom:14px}
.lead-text{color:var(--c-text-3);font-size:17px;line-height:1.85}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.4px;color:var(--c-brand-600);background:var(--c-brand-100);border-radius:var(--r-pill);height:26px;padding:0 12px;margin-bottom:16px}
.divider{height:1px;background:var(--c-line);border:0;margin:0}

/* ============ 顶部导航 ============ */
.rk-header{
  position:sticky;top:0;z-index:1030;background:rgba(247,245,240,.86);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--c-line);transition:box-shadow var(--ease)
}
.rk-header.is-scrolled{box-shadow:var(--sh-1)}
.rk-nav{display:flex;align-items:center;justify-content:space-between;height:76px;gap:24px}
.rk-logo{display:inline-flex;align-items:center;gap:10px}
.rk-logo-mark{
  width:36px;height:36px;border-radius:12px;background:var(--grad-brand);
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 36px
}
.rk-logo-mark svg{width:22px;height:22px;fill:none;stroke:#fff;stroke-width:1.4;stroke-linecap:round}
.rk-logo-text{font-size:18px;font-weight:700;color:var(--c-brand-700);letter-spacing:.2px}
.rk-nav-list{display:flex;align-items:center;gap:28px;list-style:none;margin:0;padding:0}
.rk-nav-link{
  position:relative;display:inline-block;font-size:15px;font-weight:500;color:var(--c-text-2);
  padding:9px 12px;border-radius:var(--r-pill)
}
.rk-nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;border-radius:2px;
  background:var(--grad-brand);opacity:0;transform:scaleX(.4);transition:opacity var(--ease),transform var(--ease)
}
.rk-nav-link:hover{color:var(--c-brand-600);background:rgba(27,107,88,.05)}
.rk-nav-link:hover::after{opacity:1;transform:scaleX(1)}
.rk-nav-link.is-active{color:var(--c-brand-700);font-weight:600;background:rgba(27,107,88,.06)}
.rk-nav-link.is-active::after{height:3px;opacity:1;transform:scaleX(1)}
.rk-nav-right{display:flex;align-items:center;gap:32px}
.rk-burger{
  display:none;width:40px;height:40px;border:0;border-radius:12px;background:var(--c-brand-100);
  padding:0;cursor:pointer;position:relative
}
.rk-burger span{
  position:absolute;left:11px;right:11px;height:2px;border-radius:2px;background:var(--c-brand-700);
  transition:transform var(--ease),opacity var(--ease),top var(--ease)
}
.rk-burger span:nth-child(1){top:14px}
.rk-burger span:nth-child(2){top:19px}
.rk-burger span:nth-child(3){top:24px}
.rk-burger.is-open span:nth-child(1){top:19px;transform:rotate(45deg)}
.rk-burger.is-open span:nth-child(2){opacity:0}
.rk-burger.is-open span:nth-child(3){top:19px;transform:rotate(-45deg)}
.rk-mobile{display:none;background:#fff;box-shadow:var(--sh-2);border-radius:0 0 var(--r-lg) var(--r-lg);padding:8px 24px 20px}
.rk-mobile.is-open{display:block}
.rk-mobile a{
  display:block;line-height:52px;font-size:16px;color:var(--c-text-2);border-bottom:1px solid var(--c-line)
}
.rk-mobile a:hover{color:var(--c-brand-600)}
.rk-mobile a.is-active{color:var(--c-brand-700);font-weight:600}
.rk-mobile .btn-rk{width:100%;margin-top:16px;justify-content:center}

/* ============ 按钮 ============ */
.btn-rk{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border:0;border-radius:var(--r-pill);
  font-size:16px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),filter var(--ease)
}
.btn-rk-primary{background:var(--grad-brand);color:#fff;box-shadow:var(--sh-brand)}
.btn-rk-primary:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 14px 30px rgba(27,107,88,.34);color:#fff}
.btn-rk-primary:active{transform:translateY(0);box-shadow:0 6px 16px rgba(27,107,88,.24)}
.btn-rk-accent{background:var(--grad-accent);color:#fff;box-shadow:0 10px 24px rgba(210,84,31,.28)}
.btn-rk-accent:hover{filter:brightness(1.07);transform:translateY(-1px);color:#fff}
.btn-rk-accent:active{transform:translateY(0)}
.btn-rk-ghost{background:transparent;color:var(--c-brand-600);border:1.5px solid var(--c-brand-600)}
.btn-rk-ghost:hover{background:rgba(27,107,88,.08);transform:translateY(-1px);color:var(--c-brand-700)}
.btn-rk-ghost:active{transform:translateY(0)}
.btn-rk-ghost-light{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.7)}
.btn-rk-ghost-light:hover{background:rgba(255,255,255,.14);color:#fff;transform:translateY(-1px)}
.btn-rk-lg{height:54px;font-size:17px}
.btn-rk:disabled,.btn-rk[disabled]{opacity:.55;cursor:not-allowed;transform:none}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--c-brand-600)}
.link-arrow i{font-style:normal;transition:transform var(--ease)}
.link-arrow:hover{text-decoration:underline;text-underline-offset:4px}
.link-arrow:hover i{transform:translateX(3px)}

/* ============ 徽章 / 面包屑 ============ */
.badge-pill{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);font-size:12.5px;font-weight:600;background:var(--c-brand-100);color:var(--c-brand-700)}
.badge-accent{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);font-size:12.5px;font-weight:600;background:var(--c-accent-100);color:var(--c-accent-600)}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--c-text-3);margin:20px 0 22px}
.crumb a{color:var(--c-text-3)}
.crumb a:hover{color:var(--c-brand-600)}
.crumb .sep{color:var(--c-line-strong)}
.crumb .cur{color:var(--c-text-2);font-weight:700}

/* ============ 窄版 Hero ============ */
.hero-mini{
  border-radius:var(--r-2xl);background:var(--grad-brand);color:var(--c-text-invert);
  position:relative;overflow:hidden;padding:56px 56px;margin-top:8px
}
.hero-mini::before{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(45deg,rgba(255,255,255,.04) 0 1px,transparent 1px 14px);
  pointer-events:none
}
.hero-mini::after{
  content:"";position:absolute;width:520px;height:520px;right:-140px;top:-190px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.14) 0%,rgba(255,255,255,0) 68%);pointer-events:none
}
.hero-mini .hero-inner{position:relative;z-index:2}
.hero-badge{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:var(--r-pill);
  border:1px solid rgba(255,255,255,.45);color:rgba(255,255,255,.9);font-size:13px;font-weight:600;
  margin-bottom:18px;background:rgba(255,255,255,.06)
}
.hero-mini h1{color:#fff;font-size:38px;margin-bottom:16px}
.hero-mini .hero-sub{font-size:17px;color:rgba(242,247,244,.86);max-width:560px;margin-bottom:26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.hero-points{display:flex;flex-wrap:wrap;gap:22px;margin-top:26px}
.hero-points span{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:rgba(242,247,244,.86)}
.hero-points b{color:var(--c-highlight);font-weight:700}
.hero-media{border-radius:var(--r-xl);overflow:hidden;border:1px solid rgba(255,255,255,.18);aspect-ratio:4/3;position:relative}
.hero-media img{width:100%;height:100%;object-fit:cover;object-position:center top}
.hero-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,43,37,.10),rgba(11,43,37,.42))}

/* ============ 三步流程条 ============ */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;position:relative}
.steps::before{
  content:"";position:absolute;left:8%;right:8%;top:26px;border-top:2px dashed var(--c-brand-300);z-index:0
}
.step-card{position:relative;z-index:1;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);padding:28px 26px;transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease)}
.step-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--c-brand-300)}
.step-num{
  width:52px;height:52px;border-radius:50%;background:var(--c-brand-100);color:var(--c-brand-700);
  display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:800;
  font-variant-numeric:tabular-nums;margin-bottom:18px;border:2px solid #fff;box-shadow:var(--sh-1)
}
.step-card h3{font-size:18px;margin-bottom:10px}
.step-card p{font-size:15px;color:var(--c-text-3)}

/* ============ 图文交错 ============ */
.split{display:grid;grid-template-columns:5fr 6fr;gap:48px;align-items:center}
.split.reverse{grid-template-columns:6fr 5fr}
.split.reverse .split-media{order:2}
.split.reverse .split-body{order:1}
.split-media{border-radius:var(--r-xl);overflow:hidden;aspect-ratio:4/3;border:1px solid var(--c-line)}
.split-media img{width:100%;height:100%;object-fit:cover;object-position:center top;transition:transform var(--ease)}
.split-media:hover img{transform:scale(1.03)}
.split-body h2{font-size:28px;margin-bottom:16px}
.split-body p{color:var(--c-text-2);font-size:16px}
.check-list{list-style:none;margin:18px 0 0;padding:0}
.check-list li{display:flex;gap:12px;align-items:flex-start;font-size:15.5px;color:var(--c-text-2);line-height:1.8;padding:6px 0}
.check-list li::before{
  content:"";flex:0 0 18px;width:18px;height:18px;margin-top:6px;border-radius:50%;
  border:2px solid var(--c-brand-500);
  background:linear-gradient(0deg,rgba(36,135,109,.18),rgba(36,135,109,.18));
  background-image:none
}
.check-list li::after{content:none}
.tick{flex:0 0 18px;width:18px;height:18px;margin-top:6px;border-radius:50%;border:2px solid var(--c-brand-500);position:relative}
.tick::after{content:"";position:absolute;left:4px;top:1px;width:5px;height:9px;border-right:2px solid var(--c-brand-600);border-bottom:2px solid var(--c-brand-600);transform:rotate(40deg)}
.check-item{display:flex;gap:12px;align-items:flex-start;font-size:15.5px;color:var(--c-text-2);padding:6px 0}

/* ============ 场景 / 卡片 ============ */
.grid-2x2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.card-rk{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);padding:26px;transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease)}
.card-rk:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--c-brand-300)}
.card-rk h3{font-size:18px;margin-bottom:10px}
.card-rk p{font-size:15px;color:var(--c-text-3)}
.card-num{
  width:34px;height:34px;border-radius:var(--r-xs);background:var(--grad-brand);color:#fff;font-weight:700;
  display:flex;align-items:center;justify-content:center;font-size:15px;margin-bottom:16px;
  font-variant-numeric:tabular-nums
}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.media-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);overflow:hidden;transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);height:100%}
.media-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--c-brand-300)}
.media-thumb{aspect-ratio:16/10;overflow:hidden;background:var(--c-brand-100)}
.media-thumb img{width:100%;height:100%;object-fit:cover;object-position:center top;transition:transform var(--ease)}
.media-card:hover .media-thumb img{transform:scale(1.03)}
.media-body{padding:22px 24px 24px}
.media-body h3{font-size:18px;margin-bottom:10px}
.media-body p{font-size:15px;color:var(--c-text-3)}

/* 数据带 */
.data-band{
  background:var(--c-brand-900);border-radius:var(--r-2xl);color:var(--c-text-invert);
  position:relative;overflow:hidden;padding:56px 48px
}
.data-band::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(118deg,rgba(15,58,49,.78),rgba(27,107,88,.62)),repeating-linear-gradient(45deg,rgba(255,255,255,.04) 0 1px,transparent 1px 14px);
}
.data-band-inner{position:relative;z-index:2}
.data-band h2{color:#fff;margin-bottom:14px}
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:32px}
.data-item{background:rgba(255,255,255,.08);border-radius:var(--r-lg);padding:24px}
.data-item .num{font-size:34px;font-weight:800;color:var(--c-highlight);font-variant-numeric:tabular-nums;line-height:1.2}
.data-item .cap{font-size:13.5px;color:rgba(242,247,244,.78);margin-top:8px}
.band-note{font-size:14px;color:rgba(242,247,244,.72);margin-top:22px}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:920px}
.faq-item{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-lg);position:relative;overflow:hidden;transition:box-shadow var(--ease),border-color var(--ease)}
.faq-item::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;border-radius:4px;background:var(--c-brand-600);opacity:0;transition:opacity var(--ease)}
.faq-item.is-open{box-shadow:var(--sh-1);border-color:var(--c-brand-300)}
.faq-item.is-open::before{opacity:1}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;text-align:left;background:transparent;border:0;
  padding:20px 24px;font-size:17px;font-weight:600;color:var(--c-text);cursor:pointer
}
.faq-q .qidx{
  flex:0 0 26px;width:26px;height:26px;border-radius:var(--r-xs);background:var(--c-brand-100);
  color:var(--c-brand-700);font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center;
  font-variant-numeric:tabular-nums
}
.faq-q .qtext{flex:1}
.faq-q .qsign{flex:0 0 20px;width:20px;height:20px;position:relative}
.faq-q .qsign::before,.faq-q .qsign::after{
  content:"";position:absolute;background:var(--c-brand-600);border-radius:2px;transition:transform var(--ease),opacity var(--ease)
}
.faq-q .qsign::before{left:2px;right:2px;top:9px;height:2px}
.faq-q .qsign::after{top:2px;bottom:2px;left:9px;width:2px}
.faq-item.is-open .qsign::after{transform:scaleY(0);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height var(--ease)}
.faq-a p{padding:0 24px 22px 64px;font-size:15px;color:var(--c-text-3);line-height:1.85;margin:0}

/* ============ CTA ============ */
.cta-band{
  border-radius:var(--r-xl);background:var(--grad-brand);color:#fff;padding:44px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;position:relative;overflow:hidden
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(45deg,rgba(255,255,255,.04) 0 1px,transparent 1px 14px);
  pointer-events:none
}
.cta-band .cta-text{position:relative;z-index:2}
.cta-band h2{color:#fff;font-size:26px;margin-bottom:8px}
.cta-band p{color:rgba(242,247,244,.82);font-size:15px;margin:0}
.cta-band .btn-rk{position:relative;z-index:2}
.privacy-card{
  margin-top:20px;background:var(--c-bg-alt);border:1px solid var(--c-line);border-radius:var(--r-lg);
  padding:22px 26px;display:flex;gap:14px;align-items:flex-start
}
.privacy-card .pc-icon{
  flex:0 0 36px;width:36px;height:36px;border-radius:var(--r-md);background:#fff;display:flex;
  align-items:center;justify-content:center;box-shadow:var(--sh-1)
}
.privacy-card .pc-icon svg{width:20px;height:20px;fill:none;stroke:var(--c-brand-600);stroke-width:1.6}
.privacy-card p{font-size:14px;color:var(--c-text-3);margin:0}

/* 标签 chips */
.chips{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.chip{
  display:inline-flex;align-items:center;height:38px;padding:0 18px;border-radius:var(--r-pill);
  border:1px solid var(--c-line);background:#fff;font-size:14px;color:var(--c-text-2);transition:border-color var(--ease),color var(--ease)
}
.chip:hover{border-color:var(--c-brand-600);color:var(--c-brand-600)}

/* ============ 页脚 ============ */
.rk-footer{background:var(--c-brand-900);color:rgba(242,247,244,.72);padding:64px 0 28px;margin-top:88px;position:relative}
.rk-footer::before{content:"";position:absolute;left:0;right:0;top:0;height:4px;background:var(--grad-brand)}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .rk-logo-mark{background:var(--grad-brand)}
.footer-brand .rk-logo-text{color:#fff;font-size:17px}
.footer-desc{font-size:14px;line-height:1.9;color:rgba(242,247,244,.7);max-width:320px}
.footer-col h4{font-size:15px;font-weight:700;color:var(--c-text-invert);margin-bottom:16px}
.footer-col ul{list-style:none;margin:0;padding:0}
.footer-col li{margin-bottom:4px}
.footer-col a{font-size:14px;color:rgba(242,247,244,.72);line-height:2;text-underline-offset:4px}
.footer-col a:hover{color:#fff;text-decoration:underline}
.footer-bottom{
  margin-top:48px;padding-top:20px;border-top:1px solid rgba(242,247,244,.14);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:13px;color:rgba(242,247,244,.5)
}

/* ============ 弹层 ============ */
.modal-backdrop-custom{background:rgba(11,43,37,.55)}
.modal-content{border:0;border-radius:var(--r-xl);overflow:hidden}
#askModal .modal-content{position:relative}
#askModal .modal-content::before{content:"";position:absolute;left:0;right:0;top:0;height:4px;background:var(--grad-accent);z-index:3}
#askModal .modal-header{border:0;padding:26px 28px 8px;align-items:flex-start}
#askModal .modal-title{font-size:22px;font-weight:700}
#askModal .modal-body{padding:8px 28px 28px}
#askModal .modal-dialog{max-width:520px}
.modal-close{
  width:36px;height:36px;border:0;border-radius:10px;background:transparent;font-size:18px;line-height:1;
  color:var(--c-text-3);cursor:pointer;position:relative
}
.modal-close:hover{background:var(--c-bg-alt);color:var(--c-text)}
.form-field{margin-bottom:18px}
.form-field label{display:block;font-size:14px;font-weight:600;color:var(--c-text-2);margin-bottom:8px}
.form-field label .req{color:var(--c-brand-600)}
.form-control-rk{
  width:100%;height:48px;border-radius:var(--r-md);border:1px solid var(--c-line);background:#fff;
  padding:0 16px;font-size:15px;color:var(--c-text);transition:border-color var(--ease),box-shadow var(--ease)
}
textarea.form-control-rk{height:120px;padding:14px 16px;resize:vertical;line-height:1.7}
.form-control-rk:focus{outline:none;border-color:var(--c-brand-600);box-shadow:0 0 0 4px rgba(27,107,88,.12)}
.form-check-rk{display:flex;gap:10px;align-items:flex-start;margin:6px 0 20px}
.form-check-rk input{
  appearance:none;-webkit-appearance:none;width:20px;height:20px;flex:0 0 20px;margin-top:3px;
  border-radius:var(--r-xs);border:1px solid var(--c-line-strong);background:#fff;cursor:pointer;position:relative;transition:background var(--ease),border-color var(--ease)
}
.form-check-rk input:checked{background:var(--grad-brand);border-color:var(--c-brand-600)}
.form-check-rk input:checked::after{
  content:"";position:absolute;left:6px;top:2px;width:6px;height:11px;
  border-right:2px solid #fff;border-bottom:2px solid #fff;transform:rotate(40deg)
}
.form-check-rk span{font-size:13px;color:var(--c-text-3);line-height:1.7}
.form-note{font-size:13px;color:var(--c-text-3);margin-top:12px}
.modal.fade .modal-dialog{transform:translateY(16px);transition:transform var(--ease),opacity var(--ease);opacity:0}
.modal.show .modal-dialog{transform:translateY(0);opacity:1}

/* 返回顶部 */
.to-top{
  position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:50%;border:0;
  background:var(--grad-brand);box-shadow:var(--sh-2);color:#fff;font-size:18px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;
  transition:opacity var(--ease),visibility var(--ease),transform var(--ease);z-index:1040
}
.to-top.is-visible{opacity:1;visibility:visible}
.to-top:hover{transform:translateY(-2px)}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .hero-mini h1{font-size:34px}
  .split,.split.reverse{gap:36px}
}
@media (max-width:991px){
  .rk-nav{height:64px}
  .rk-nav-list{display:none}
  .rk-nav-right{gap:16px}
  .rk-nav-right .btn-rk-primary{display:none}
  .rk-burger{display:block}
  .data-grid{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .section{padding:72px 0}
}
@media (max-width:767px){
  body{font-size:16px}
  h1{font-size:28px}
  h2{font-size:24px}
  h3{font-size:19px}
  h4{font-size:17px}
  .section{padding:56px 0}
  .section-head{margin-bottom:32px}
  .container{padding-left:16px;padding-right:16px}
  .hero-mini{padding:32px 24px;border-radius:var(--r-xl)}
  .hero-mini h1{font-size:26px}
  .hero-mini .hero-sub{font-size:16px}
  .hero-actions{gap:12px}
  .hero-actions .btn-rk{width:100%}
  .hero-points{gap:14px}
  .steps{grid-template-columns:1fr;gap:16px}
  .steps::before{display:none}
  .split,.split.reverse{grid-template-columns:1fr;gap:24px}
  .split.reverse .split-media{order:0}
  .split.reverse .split-body{order:0}
  .grid-2x2,.grid-3{grid-template-columns:1fr}
  .data-band{padding:36px 24px;border-radius:var(--r-xl)}
  .data-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px 24px}
  .cta-band .btn-rk{width:100%}
  .faq-q{padding:18px 18px;font-size:16px}
  .faq-a p{padding:0 18px 20px 58px}
  .footer-bottom{flex-direction:column;gap:8px}
  .rk-footer{margin-top:56px}
  .to-top{right:16px;bottom:16px}
}
@media (max-width:575px){
  .data-grid{grid-template-columns:1fr}
  .hero-points{flex-direction:column;gap:10px}
  .modal-dialog{margin:0;max-width:100%;align-items:flex-end}
  .modal-content{border-radius:24px 24px 0 0}
}

/* roulang page: category2 */
:root{
  --bs-primary:#1B6B58;
  --bs-body-bg:#F7F5F0;
  --bs-body-color:#14211E;
  --bs-body-font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --bs-link-color:#1B6B58;
  --bs-link-hover-color:#145045;
  --bs-border-radius:14px;
  --bs-focus-ring-color:rgba(27,107,88,.35);
  --bs-gutter-x:1.5rem;

  --c-brand-900:#0B2B25;
  --c-brand-800:#0F3A31;
  --c-brand-700:#145045;
  --c-brand-600:#1B6B58;
  --c-brand-500:#24876D;
  --c-brand-300:#7FC3A9;
  --c-brand-100:#E3F1EA;
  --c-accent-600:#D2541F;
  --c-accent-500:#EC6A2B;
  --c-accent-300:#F7B187;
  --c-accent-100:#FDEBE0;
  --c-highlight:#F5C13D;
  --c-bg:#F7F5F0;
  --c-bg-alt:#EDF3EF;
  --c-surface:#FFFFFF;
  --c-line:#E2E0D9;
  --c-line-strong:#CFD6D1;
  --c-text:#14211E;
  --c-text-2:#40534D;
  --c-text-3:#6C7C77;
  --c-text-invert:#F2F7F4;
  --grad-brand:linear-gradient(118deg,#0F3A31 0%,#1B6B58 52%,#24876D 100%);
  --grad-accent:linear-gradient(118deg,#D2541F 0%,#EC6A2B 62%,#F5A45C 100%);
  --r-xs:8px;--r-sm:10px;--r-md:14px;--r-lg:20px;--r-xl:28px;--r-2xl:36px;--r-pill:999px;
  --sh-1:0 2px 8px rgba(11,43,37,.06);
  --sh-2:0 10px 28px rgba(11,43,37,.10);
  --sh-3:0 20px 48px rgba(11,43,37,.16);
  --sh-brand:0 10px 24px rgba(27,107,88,.26);
  --ease:0.24s cubic-bezier(.22,1,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--c-bg);color:var(--c-text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:17px;line-height:1.85;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--c-brand-600);text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--c-brand-700)}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;color:var(--c-text)}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--c-brand-500);outline-offset:2px;border-radius:6px}
.container{max-width:1200px;padding-left:24px;padding-right:24px}
.numeric{font-variant-numeric:tabular-nums}

/* ============ 顶部导航 ============ */
.rk-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(247,245,240,.86);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow var(--ease);
}
.rk-header.is-scrolled{box-shadow:var(--sh-1)}
.rk-nav{display:flex;align-items:center;justify-content:space-between;height:76px;gap:20px}
.rk-logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.rk-logo-mark{
  width:36px;height:36px;border-radius:12px;background:var(--grad-brand);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.rk-logo-mark svg{width:20px;height:20px;fill:none;stroke:#fff;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.rk-logo-text{font-size:18px;font-weight:700;color:var(--c-brand-700);letter-spacing:0}
.rk-nav-list{display:flex;align-items:center;gap:28px;margin:0}
.rk-nav-link{
  position:relative;display:inline-block;padding:8px 4px;
  font-size:15px;font-weight:500;color:var(--c-text-2);
  transition:color var(--ease);
}
.rk-nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:var(--grad-brand);opacity:0;transform:scaleX(.4);
  transition:opacity var(--ease),transform var(--ease);
}
.rk-nav-link:hover{color:var(--c-brand-600)}
.rk-nav-link:hover::after{opacity:1;transform:scaleX(1)}
.rk-nav-link.is-active{
  color:var(--c-brand-600);font-weight:600;background:rgba(27,107,88,.06);
  border-radius:var(--r-pill);padding:8px 14px;
}
.rk-nav-link.is-active::after{opacity:1;transform:scaleX(1);height:3px;bottom:0;left:14px;right:14px}
.rk-nav-right{display:flex;align-items:center;gap:20px}
.rk-burger{
  display:none;width:40px;height:40px;border:0;border-radius:12px;background:var(--c-brand-100);
  align-items:center;justify-content:center;flex-direction:column;gap:4px;cursor:pointer;
  transition:background var(--ease);
}
.rk-burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--c-brand-600);transition:transform var(--ease),opacity var(--ease)}
.rk-burger:hover{background:#d5e9e0}
.rk-burger.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.rk-burger.is-open span:nth-child(2){opacity:0}
.rk-burger.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.rk-mobile{
  display:none;flex-direction:column;background:#fff;box-shadow:var(--sh-2);
  border-radius:0 0 20px 20px;overflow:hidden;
}
.rk-mobile.is-open{display:flex}
.rk-mobile a{
  display:flex;align-items:center;height:52px;padding:0 24px;
  font-size:15px;font-weight:500;color:var(--c-text-2);border-bottom:1px solid var(--c-line);
}
.rk-mobile a.is-active{color:var(--c-brand-600);font-weight:600;background:rgba(27,107,88,.05)}
.rk-mobile a:hover{color:var(--c-brand-600);background:var(--c-bg-alt)}
.rk-mobile .btn-rk{margin:16px 24px 20px;width:calc(100% - 48px)}

/* ============ 按钮 ============ */
.btn-rk{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border:0;border-radius:var(--r-pill);
  font-size:16px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:transform var(--ease),box-shadow var(--ease),background-color var(--ease),filter var(--ease);
}
.btn-rk-primary{background:var(--grad-brand);color:#fff;box-shadow:var(--sh-brand)}
.btn-rk-primary:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 14px 30px rgba(27,107,88,.32);color:#fff}
.btn-rk-primary:active{transform:translateY(0);box-shadow:var(--sh-1);filter:brightness(.98)}
.btn-rk-ghost{background:transparent;color:var(--c-brand-600);border:1.5px solid var(--c-brand-600)}
.btn-rk-ghost:hover{background:rgba(27,107,88,.08);transform:translateY(-1px)}
.btn-rk-ghost:active{transform:translateY(0)}
.btn-rk-accent{background:var(--grad-accent);color:#fff;box-shadow:0 10px 24px rgba(210,84,31,.28)}
.btn-rk-accent:hover{filter:brightness(1.06);transform:translateY(-1px);color:#fff}
.btn-rk-accent:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn-rk-lg{height:54px;padding:0 34px}
.btn-rk:disabled{opacity:.55;cursor:not-allowed}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--c-brand-600);
}
.link-arrow .arw{transition:transform var(--ease)}
.link-arrow:hover .arw{transform:translateX(3px)}
.link-arrow:hover{text-decoration:underline;text-underline-offset:4px}

/* ============ 通用板块 ============ */
.section{padding:88px 0}
.section-alt{background:var(--c-bg-alt)}
.section-surface{background:var(--c-surface)}
.section-head{max-width:820px;margin-bottom:40px}
.eyebrow{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--c-brand-100);color:var(--c-brand-700);font-size:13px;font-weight:600;margin-bottom:16px;
}
.eyebrow-accent{background:var(--c-accent-100);color:var(--c-accent-600)}
h2.section-title{font-size:32px;font-weight:700;margin-bottom:14px}
.section-lead{font-size:17px;color:var(--c-text-2);max-width:780px}
.muted{color:var(--c-text-3);font-size:15px}
.small-note{font-size:13px;color:var(--c-text-3)}

/* ============ 全宽封面 ============ */
.cover-hero{padding:24px 0 0}
.cover-frame{
  position:relative;border-radius:var(--r-2xl);overflow:hidden;
  aspect-ratio:21/9;min-height:320px;background:var(--c-brand-800);
}
.cover-frame img{width:100%;height:100%;object-fit:cover;object-position:center 35%}
.cover-mask{
  position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(11,43,37,.82) 0%,rgba(11,43,37,.55) 46%,rgba(11,43,37,.35) 100%);
}
.cover-copy{
  position:absolute;left:0;right:0;bottom:0;padding:0 48px 44px;
  color:var(--c-text-invert);
}
.breadcrumb-rk{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:rgba(242,247,244,.75);margin-bottom:18px;
}
.breadcrumb-rk a{color:rgba(242,247,244,.75)}
.breadcrumb-rk a:hover{color:#fff}
.breadcrumb-rk .sep{opacity:.55}
.breadcrumb-rk .current{color:#fff;font-weight:600}
.cover-copy h1{
  color:#fff;font-size:42px;font-weight:800;letter-spacing:0;
  max-width:900px;margin-bottom:14px;
}
.cover-sub{font-size:17px;color:rgba(242,247,244,.88);max-width:720px;line-height:1.8}
.cover-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.cover-tag{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.24);
  color:#fff;font-size:13px;font-weight:500;
}

/* ============ 引言 + 对比卡 ============ */
.intro-grid{display:grid;grid-template-columns:1fr;gap:20px;max-width:820px;margin-bottom:44px}
.intro-text{font-size:17px;color:var(--c-text-2)}
.compare-wrap{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.compare-card{
  border-radius:var(--r-xl);padding:34px;border:1px solid var(--c-line);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.compare-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--c-brand-300)}
.compare-card.is-brand{background:var(--c-brand-100);border-color:#cde5da}
.compare-card.is-accent{background:var(--c-accent-100);border-color:#f6dccb}
.compare-card h3{font-size:20px;font-weight:700;margin-bottom:8px}
.compare-card .card-kicker{font-size:14px;color:var(--c-text-2);margin-bottom:20px}
.compare-list li{
  display:flex;gap:12px;align-items:flex-start;padding:12px 0;border-top:1px solid rgba(11,43,37,.08);
  font-size:15.5px;color:var(--c-text-2);line-height:1.75;
}
.compare-list li:first-child{border-top:0;padding-top:0}
.ic{
  flex-shrink:0;width:22px;height:22px;border-radius:7px;display:flex;align-items:center;justify-content:center;
  margin-top:4px;
}
.ic-brand{background:var(--c-brand-600)}
.ic-accent{background:var(--c-accent-500)}
.ic svg{width:13px;height:13px;fill:none;stroke:#fff;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}

/* ============ 特征网格 2×3 ============ */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  padding:26px;transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--c-brand-300)}
.feature-icon{
  width:44px;height:44px;border-radius:var(--r-md);background:var(--c-brand-100);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.feature-icon svg{width:22px;height:22px;fill:none;stroke:var(--c-brand-600);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.feature-card h3{font-size:17px;font-weight:700;margin-bottom:8px}
.feature-card p{font-size:15px;color:var(--c-text-3)}

/* ============ 数据徽章行 ============ */
.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.stat-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  padding:28px;box-shadow:var(--sh-2);transition:transform var(--ease),border-color var(--ease);
}
.stat-card:hover{transform:translateY(-4px);border-color:var(--c-brand-300)}
.stat-num{
  font-size:38px;font-weight:800;line-height:1.1;color:var(--c-brand-600);
  font-variant-numeric:tabular-nums;margin-bottom:6px;
}
.stat-num em{font-style:normal;font-size:15px;font-weight:600;color:var(--c-text-3);margin-left:6px}
.stat-label{font-size:15px;font-weight:600;color:var(--c-text);margin-bottom:6px}
.stat-desc{font-size:13px;color:var(--c-text-3);line-height:1.75}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px}
.rk-faq .accordion-item{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-lg);overflow:hidden;
  transition:box-shadow var(--ease),border-color var(--ease);
}
.rk-faq .accordion-item:hover{border-color:var(--c-brand-300)}
.rk-faq .accordion-button{
  display:flex;align-items:center;gap:14px;width:100%;
  background:#fff;border:0;box-shadow:none;padding:20px 24px;
  font-size:17px;font-weight:600;color:var(--c-text);text-align:left;
  transition:color var(--ease),background-color var(--ease);
}
.rk-faq .accordion-button:not(.collapsed){color:var(--c-brand-600);box-shadow:var(--sh-1)}
.rk-faq .accordion-button:focus{box-shadow:none;outline:2px solid var(--c-brand-500);outline-offset:-4px}
.rk-faq .accordion-button::after{display:none}
.faq-idx{
  flex-shrink:0;width:26px;height:26px;border-radius:8px;background:var(--c-brand-100);
  color:var(--c-brand-700);font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center;
  font-variant-numeric:tabular-nums;
}
.rk-faq .accordion-button:not(.collapsed) .faq-idx{background:var(--c-brand-600);color:#fff}
.rk-faq .accordion-body{padding:0 24px 22px 64px;font-size:15px;color:var(--c-text-3);line-height:1.85}
.rk-faq .accordion-collapse{transition:height .3s cubic-bezier(.22,1,.36,1)}

/* ============ CTA 条 ============ */
.cta-band{
  position:relative;border-radius:var(--r-xl);overflow:hidden;
  background:var(--grad-brand);padding:56px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(45deg,rgba(255,255,255,.04) 0 1px,transparent 1px 14px);
  pointer-events:none;
}
.cta-band::after{
  content:"";position:absolute;top:-40%;right:-10%;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.10) 0%,transparent 70%);pointer-events:none;
}
.cta-band h2{position:relative;color:#fff;font-size:30px;font-weight:700;margin-bottom:10px}
.cta-band p{position:relative;color:rgba(242,247,244,.88);font-size:16px;max-width:620px}
.cta-band .btn-rk{position:relative}
.privacy-card{
  margin-top:20px;background:var(--c-bg-alt);border-radius:var(--r-lg);padding:24px 28px;
  display:flex;flex-wrap:wrap;gap:12px 28px;align-items:center;
}
.privacy-card h3{font-size:15px;font-weight:700;width:100%;margin-bottom:2px}
.privacy-card span{font-size:13px;color:var(--c-text-3);display:inline-flex;align-items:center;gap:8px}
.privacy-card span::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--c-brand-500);flex-shrink:0;
}

/* ============ 尾部链接 ============ */
.chip-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:40px}
.chip{
  display:inline-flex;align-items:center;height:34px;padding:0 16px;border-radius:var(--r-pill);
  background:#fff;border:1px solid var(--c-line);font-size:14px;color:var(--c-text-2);
  transition:border-color var(--ease),color var(--ease),transform var(--ease);
}
.chip:hover{border-color:var(--c-brand-600);color:var(--c-brand-600);transform:translateY(-2px)}

/* ============ 弹层 ============ */
.modal-backdrop.show{opacity:1;background:rgba(11,43,37,.55)}
.rk-modal .modal-dialog{max-width:520px}
.rk-modal .modal-content{
  border:0;border-radius:var(--r-xl);overflow:hidden;box-shadow:var(--sh-3);
  position:relative;
}
.rk-modal .modal-content::before{
  content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--grad-accent);
}
.rk-modal .modal-header{border:0;padding:28px 32px 8px;align-items:flex-start}
.rk-modal .modal-title{font-size:22px;font-weight:700}
.rk-modal .btn-close{
  width:36px;height:36px;border-radius:10px;background:transparent;opacity:1;
  padding:0;margin:0;display:flex;align-items:center;justify-content:center;
  background-image:none;position:relative;transition:background-color var(--ease);
}
.rk-modal .btn-close::before,.rk-modal .btn-close::after{
  content:"";position:absolute;width:16px;height:2px;border-radius:2px;background:var(--c-text-2);
}
.rk-modal .btn-close::before{transform:rotate(45deg)}
.rk-modal .btn-close::after{transform:rotate(-45deg)}
.rk-modal .btn-close:hover{background:var(--c-bg-alt)}
.rk-modal .modal-body{padding:8px 32px 32px}
.form-field{margin-bottom:18px}
.form-field label{display:block;font-size:14px;font-weight:600;color:var(--c-text-2);margin-bottom:8px}
.form-field .req{color:var(--c-brand-600)}
.form-control,.form-select{
  height:48px;border-radius:var(--r-md);border:1px solid var(--c-line);
  padding:0 16px;font-size:15px;color:var(--c-text);background:#fff;
  box-shadow:none;transition:border-color var(--ease),box-shadow var(--ease);
}
textarea.form-control{height:120px;padding:14px 16px;line-height:1.7;resize:vertical}
.form-control:focus,.form-select:focus{
  border-color:var(--c-brand-600);box-shadow:0 0 0 4px rgba(27,107,88,.12);outline:none;
}
.check-line{display:flex;align-items:flex-start;gap:10px;font-size:13px;color:var(--c-text-3);line-height:1.7}
.check-line input{
  appearance:none;-webkit-appearance:none;width:20px;height:20px;border-radius:var(--r-xs);
  border:1px solid var(--c-line-strong);background:#fff;margin:2px 0 0;flex-shrink:0;cursor:pointer;
  transition:background var(--ease),border-color var(--ease);
}
.check-line input:checked{background:var(--grad-brand);border-color:var(--c-brand-600)}
.form-submit{width:100%;height:52px;margin-top:6px}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:50%;
  background:var(--grad-brand);box-shadow:var(--sh-2);border:0;cursor:pointer;
  display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;
  transition:opacity var(--ease),visibility var(--ease),transform var(--ease);z-index:1040;
}
.to-top.is-visible{opacity:1;visibility:visible}
.to-top:hover{transform:translateY(-3px)}
.to-top svg{width:20px;height:20px;fill:none;stroke:#fff;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}

/* ============ 页脚 ============ */
.rk-footer{
  position:relative;background:var(--c-brand-900);color:var(--c-text-invert);
  padding:64px 0 28px;margin-top:88px;
}
.rk-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--grad-brand)}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .rk-logo-text{color:var(--c-text-invert)}
.footer-desc{font-size:14px;color:rgba(242,247,244,.72);line-height:1.85;max-width:340px}
.footer-col h4{font-size:15px;font-weight:700;color:var(--c-text-invert);margin-bottom:16px}
.footer-col ul li{margin-bottom:2px}
.footer-col ul li a{
  font-size:14px;color:rgba(242,247,244,.72);line-height:2;
  transition:color var(--ease);
}
.footer-col ul li a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.footer-bottom{
  margin-top:48px;padding-top:24px;border-top:1px solid rgba(242,247,244,.14);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:rgba(242,247,244,.5);
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .cover-copy h1{font-size:36px}
  .cta-band{padding:48px}
}
@media (max-width:991px){
  .rk-nav{height:64px}
  .rk-nav-list,.rk-nav-right .btn-rk{display:none}
  .rk-burger{display:flex}
  .section{padding:64px 0}
  h2.section-title{font-size:26px}
  .cover-frame{aspect-ratio:16/10}
  .cover-copy{padding:0 32px 32px}
  .cover-copy h1{font-size:30px}
  .compare-wrap{grid-template-columns:1fr}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .stat-row{grid-template-columns:1fr}
  .rk-footer{margin-top:64px;padding-top:48px}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding-left:16px;padding-right:16px}
  .section{padding:56px 0}
  h2.section-title{font-size:24px}
  .section-lead{font-size:15.5px}
  .cover-hero{padding:16px 0 0}
  .cover-frame{aspect-ratio:4/3;border-radius:var(--r-xl)}
  .cover-copy{padding:0 20px 26px}
  .cover-copy h1{font-size:28px}
  .cover-sub{font-size:15px}
  .cover-tag{font-size:12px;height:28px}
  .compare-card{padding:24px}
  .feature-grid{grid-template-columns:1fr}
  .cta-band{padding:32px 24px;border-radius:var(--r-lg)}
  .cta-band h2{font-size:22px}
  .cta-band .btn-rk{width:100%}
  .rk-faq .accordion-button{font-size:16px;padding:18px 18px}
  .rk-faq .accordion-body{padding:0 18px 20px 58px}
  .privacy-card{padding:20px}
  .footer-bottom{flex-direction:column;gap:8px}
  .to-top{right:16px;bottom:16px;width:44px;height:44px}
}
@media (max-width:575px){
  .cover-copy h1{font-size:26px}
  .stat-num{font-size:32px}
  .rk-modal .modal-dialog{margin:0;align-items:flex-end;min-height:calc(100% - 0px)}
  .rk-modal .modal-content{border-radius:24px 24px 0 0}
  .rk-modal .modal-header{padding:24px 20px 6px}
  .rk-modal .modal-body{padding:8px 20px 28px}
}