/* roulang page: index */
/* ===== 设计变量 ===== */
:root{
  --paper:#F7F5F1;
  --paper-2:#FFFFFF;
  --paper-3:#F1EEE8;
  --ink-900:#0E0F12;
  --ink-700:#2A2D33;
  --ink-500:#5C6169;
  --line:#E4E0D8;
  --line-dark:rgba(255,255,255,.08);
  --accent:#C8F135;
  --accent-2:#FF5A2B;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --r-pill:999px;
  --sidenav-w:208px;
  --ease:cubic-bezier(.16,.84,.3,1);
  --ease-btn:cubic-bezier(.2,.6,.2,1);
  --shadow-card:0 1px 0 rgba(14,15,18,.04);
  --shadow-hover:0 10px 30px rgba(14,15,18,.08);
}
/* ===== reset ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--ink-900);
  font-family:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,-apple-system,'Segoe UI',sans-serif;
  font-size:16px;line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input{font-family:inherit;font-size:inherit;color:inherit}
h1,h2,h3,h4,p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
::selection{background:var(--accent);color:var(--ink-900)}
section[id],div[id]{scroll-margin-top:24px}

/* ===== 滚动进度条 ===== */
.progress-v{position:fixed;left:0;top:0;width:2px;height:0;background:var(--accent);z-index:120;transition:height .1s linear}
.progress-h{position:fixed;left:0;top:0;height:2px;width:0;background:var(--accent);z-index:120;display:none;transition:width .1s linear}

/* ===== 桌面左栏 ===== */
.sidenav{
  position:fixed;left:0;top:0;width:var(--sidenav-w);height:100%;
  background:var(--ink-900);border-right:1px solid var(--line-dark);
  display:flex;flex-direction:column;padding:30px 0 20px;z-index:80;
}
.brand{padding:0 20px;flex:0 0 auto}
.brand-logo{
  display:block;font-size:16px;line-height:1.3;font-weight:900;color:#F7F5F1;
  letter-spacing:-.01em;
}
.brand-logo:hover{color:var(--accent)}
.brand-line{display:block;width:34px;height:2px;background:var(--accent);margin:16px 0 14px}
.brand-note{font-size:12px;line-height:1.6;color:rgba(247,245,241,.5);margin:0}
.navlist{flex:1 1 auto;overflow-y:auto;margin-top:26px;padding-bottom:12px}
.navlist::-webkit-scrollbar{width:4px}
.navlist::-webkit-scrollbar-thumb{background:rgba(255,255,255,.14);border-radius:2px}
.nav-group-title{
  font-size:11px;letter-spacing:.16em;color:rgba(247,245,241,.38);
  padding:0 20px;margin:18px 0 6px;font-weight:600;
}
.nav-group-title:first-child{margin-top:0}
.navlink{
  display:block;position:relative;padding:0 20px;line-height:40px;font-size:14px;
  color:rgba(247,245,241,.68);transition:color .2s var(--ease-btn),background .2s var(--ease-btn);
}
.navlink::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:2px;
  background:transparent;transition:background .2s var(--ease-btn);
}
.navlink:hover{color:#F7F5F1;background:rgba(255,255,255,.04)}
.navlink.active{color:#FFFFFF;font-weight:700}
.navlink.active::before{background:var(--accent)}
.sidenav-foot{flex:0 0 auto;padding:16px 16px 0;border-top:1px solid var(--line-dark);margin-top:12px}
.sidenav-note{font-size:11.5px;line-height:1.5;color:rgba(247,245,241,.42);margin:12px 4px 0;text-align:center}

/* ===== 顶部栏与抽屉（移动端） ===== */
.topbar{
  position:fixed;left:0;right:0;top:0;height:64px;background:var(--ink-900);
  display:none;align-items:center;justify-content:space-between;gap:12px;
  padding:0 16px;z-index:90;border-bottom:1px solid var(--line-dark);
}
.topbar-brand{font-size:13px;line-height:1.25;font-weight:900;color:#F7F5F1;max-width:170px}
.burger{
  width:44px;height:44px;border:1px solid var(--line-dark);border-radius:var(--r-sm);
  background:transparent;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  cursor:pointer;flex:0 0 auto;
}
.burger span{display:block;width:18px;height:2px;background:#F7F5F1;transition:transform .25s var(--ease-btn),opacity .25s}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.scrim{
  position:fixed;inset:0;background:rgba(14,15,18,.55);opacity:0;pointer-events:none;
  transition:opacity .3s var(--ease);z-index:95;
}
.scrim.show{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;right:0;width:84vw;max-width:360px;height:100%;
  background:var(--ink-900);transform:translateX(100%);
  transition:transform .36s var(--ease);z-index:100;
  display:flex;flex-direction:column;
}
.drawer.open{transform:translateX(0)}
.drawer-head{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:18px 20px;border-bottom:1px solid var(--line-dark);
}
.drawer-brand{font-size:14px;line-height:1.3;font-weight:900;color:#F7F5F1}
.drawer-close{
  width:36px;height:36px;border:1px solid var(--line-dark);border-radius:var(--r-sm);
  background:transparent;color:#F7F5F1;font-size:20px;line-height:1;cursor:pointer;
}
.drawer-close:hover{border-color:var(--accent);color:var(--accent)}
.drawer-nav{flex:1 1 auto;overflow-y:auto;padding:10px 0}
.drawer-nav a{
  display:block;position:relative;font-size:18px;line-height:48px;padding:0 24px;
  color:rgba(247,245,241,.82);border-bottom:1px solid var(--line-dark);
}
.drawer-nav a::before{content:"";position:absolute;left:0;top:12px;bottom:12px;width:2px;background:transparent}
.drawer-nav a:hover{color:#fff;background:rgba(255,255,255,.05)}
.drawer-nav a.active{color:#fff;font-weight:700}
.drawer-nav a.active::before{background:var(--accent)}
.drawer-foot{padding:16px 20px calc(20px + env(safe-area-inset-bottom));border-top:1px solid var(--line-dark)}

/* ===== 内容区与容器 ===== */
.content{margin-left:var(--sidenav-w)}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 40px}
.section{padding:96px 0}
.section-alt{background:var(--paper-3)}
.band-dark{background:var(--ink-900);color:#F7F5F1}

/* ===== 排版 ===== */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;font-size:12px;font-weight:700;
  letter-spacing:.14em;color:var(--ink-500);margin-bottom:18px;
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--accent)}
.eyebrow-light{color:rgba(247,245,241,.7)}
.h2{
  font-size:clamp(28px,3.4vw,44px);line-height:1.15;font-weight:900;
  letter-spacing:-.02em;margin-bottom:16px;
}
.lead{font-size:17px;line-height:1.8;color:var(--ink-500);max-width:720px}
.section-head{max-width:760px;margin-bottom:48px}
.band-dark .h2,.cta-band .h2{color:#F7F5F1}
.band-dark .lead,.cta-band .lead,.cta-band .cta-text{color:rgba(247,245,241,.72)}
.h3{font-size:22px;line-height:1.3;font-weight:800;letter-spacing:-.02em}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-pill);border:1px solid transparent;
  font-size:15px;font-weight:700;cursor:pointer;white-space:nowrap;
  transition:background .2s var(--ease-btn),color .2s var(--ease-btn),border-color .2s var(--ease-btn),transform .2s var(--ease-btn);
}
.btn-primary{background:var(--accent);color:var(--ink-900)}
.btn-primary:hover{background:var(--ink-900);color:var(--accent)}
.btn-primary:hover .btn-arrow{transform:translateX(4px)}
.btn-ghost{border-color:var(--ink-900);color:var(--ink-900);background:transparent}
.btn-ghost:hover{background:var(--ink-900);color:#FFFFFF}
.btn-ghost-inverse{border-color:rgba(247,245,241,.45);color:#F7F5F1;background:transparent}
.btn-ghost-inverse:hover{background:#F7F5F1;color:var(--ink-900);border-color:#F7F5F1}
.btn-block{width:100%}
.btn-arrow{display:inline-block;transition:transform .2s var(--ease-btn)}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed}
.link-text{color:var(--ink-900);text-decoration:underline;text-decoration-color:var(--accent);text-decoration-thickness:1px;text-underline-offset:3px;transition:text-decoration-thickness .2s}
.link-text:hover{text-decoration-thickness:2px}
.spinner{
  display:none;width:15px;height:15px;border-radius:50%;
  border:2px solid rgba(14,15,18,.25);border-top-color:var(--ink-900);
}
.btn.loading{cursor:progress}
.btn.loading .spinner{display:inline-block;animation:spin .8s linear infinite}
.btn.loading .btn-label{opacity:.55}
@keyframes spin{to{transform:rotate(360deg)}}

/* ===== 首屏 ===== */
.hero{position:relative;display:flex;align-items:center;overflow:hidden;background:var(--ink-900);min-height:640px}
.hero-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.webp');background-size:cover;background-position:center}
.hero-bg::after{content:"";position:absolute;inset:0;background:rgba(14,15,18,.82)}
.hero-grid{
  position:absolute;inset:0;opacity:.55;
  background-image:linear-gradient(to right,rgba(255,255,255,.055) 1px,transparent 1px);
  background-size:calc(100% / 6) 100%;
}
.hero-inner{position:relative;z-index:2;width:100%;padding:120px 0 100px}
.hero-title{font-size:clamp(40px,6.2vw,84px);line-height:.98;font-weight:900;letter-spacing:-.03em;color:#FFFFFF}
.hero-title span{display:block}
.hero-title-sub{font-size:clamp(20px,2.6vw,34px);color:var(--accent);margin-top:16px;letter-spacing:-.01em}
.hero-sub{font-size:17px;line-height:1.8;color:rgba(247,245,241,.72);max-width:620px;margin-top:26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:38px}
.hero-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;max-width:640px;margin-top:56px}
.stat-num{font-size:26px;font-weight:900;line-height:1.2;color:#FFFFFF;font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.stat-desc{font-size:13px;line-height:1.6;color:rgba(247,245,241,.6);margin-top:6px}
.hero-jump{
  position:absolute;right:40px;bottom:40px;z-index:3;
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:#F7F5F1;border:1px solid rgba(247,245,241,.28);
  border-radius:var(--r-pill);padding:10px 18px;background:rgba(14,15,18,.4);
  transition:transform .25s var(--ease-btn),border-color .25s var(--ease-btn);
}
.hero-jump:hover{transform:translateY(4px);border-color:var(--accent);color:var(--accent)}

/* ===== 卖点行 ===== */
.feature-list{border-top:1px solid var(--line)}
.feature-item{
  display:grid;grid-template-columns:40px minmax(0,1fr);gap:22px;
  padding:28px 0;border-bottom:1px solid var(--line);
  transition:transform .25s var(--ease),border-color .25s var(--ease);
}
.feature-item:last-child{border-bottom:0}
.feature-item:hover{transform:translateX(4px)}
.feature-num{
  font-size:13px;font-weight:800;color:var(--ink-500);letter-spacing:.06em;
  font-variant-numeric:tabular-nums;padding-top:6px;
  transition:color .2s var(--ease-btn);
}
.feature-item:hover .feature-num{color:#9CC716}
.feature-title{font-size:22px;line-height:1.3;font-weight:800;letter-spacing:-.02em;margin-bottom:8px}
.feature-desc{font-size:15.5px;line-height:1.8;color:var(--ink-500)}

/* ===== 演示区 ===== */
.demo-frame{position:relative;aspect-ratio:16/9;border-radius:var(--r-lg);overflow:hidden;background:var(--ink-900);border:1px solid var(--line)}
.demo-frame img{width:100%;height:100%;object-fit:cover}
.demo-badge{
  position:absolute;left:20px;top:20px;font-size:12px;letter-spacing:.1em;
  color:var(--accent);border:1px solid var(--accent);border-radius:var(--r-pill);
  padding:6px 14px;background:rgba(14,15,18,.6);
}
.demo-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;margin-top:30px}
.demo-points li{position:relative;padding-left:20px;font-size:15px;line-height:1.7;color:var(--ink-700)}
.demo-points li::before{content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:50%;background:var(--accent)}

/* ===== 证据带 ===== */
.proof-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;margin-top:8px}
.proof-num{font-size:clamp(34px,4.4vw,54px);line-height:1.1;font-weight:900;color:#FFFFFF;font-variant-numeric:tabular-nums;letter-spacing:-.03em}
.proof-desc{font-size:13px;line-height:1.6;color:rgba(247,245,241,.6);margin-top:10px}
.quote{border-left:3px solid var(--accent);padding-left:18px;margin-top:52px;font-size:15px;line-height:1.9;color:rgba(247,245,241,.82)}
.quote-source{font-size:13px;color:rgba(247,245,241,.5);margin-top:10px}
.trust{margin-top:32px;font-size:13px;color:rgba(247,245,241,.45);letter-spacing:.01em}

/* ===== 资讯列表 ===== */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.post-card{
  position:relative;background:var(--paper-2);border:1px solid var(--line);
  border-radius:var(--r-md);overflow:hidden;box-shadow:var(--shadow-card);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:#D6D1C6}
.post-card:focus-within{outline:2px solid var(--accent);outline-offset:2px}
.post-link{display:block;height:100%}
.post-link::after{content:"";position:absolute;inset:0}
.post-media{aspect-ratio:16/9;overflow:hidden;background:var(--paper-3)}
.post-media img{width:100%;height:100%;object-fit:cover;transition:transform .55s var(--ease)}
.post-card:hover .post-media img{transform:scale(1.03)}
.post-body{padding:20px}
.post-badge{
  display:inline-block;font-size:12px;line-height:1.6;color:var(--ink-700);
  border:1px solid var(--accent);background:rgba(200,241,53,.14);
  border-radius:var(--r-pill);padding:2px 12px;
}
.post-title{
  font-size:18px;line-height:1.45;font-weight:800;margin:12px 0 8px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-excerpt{
  font-size:14px;line-height:1.7;color:var(--ink-500);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-foot{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:16px;padding-top:14px;border-top:1px solid var(--line);
  font-size:13px;color:var(--ink-500);font-variant-numeric:tabular-nums;
}
.post-more{font-weight:700;color:var(--ink-900)}
.post-card:hover .post-more{color:#9CC716}
.empty-state{
  grid-column:1 / -1;border:1px dashed var(--line);border-radius:var(--r-md);
  padding:48px 24px;text-align:center;color:var(--ink-500);background:var(--paper-2);
}
.empty-state p{font-size:15px;margin-bottom:18px}
.skeleton{border-radius:var(--r-md);border:1px solid var(--line);background:var(--paper-2);overflow:hidden}
.skeleton-block{background:var(--paper-3);position:relative;overflow:hidden}
.skeleton-block::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.6),transparent);
  animation:sk 1.4s infinite;
}
@keyframes sk{0%{transform:translateX(-100%)}100%{transform:translateX(100%)}}

/* ===== 价格区 ===== */
.plan-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;align-items:start}
.plan{
  position:relative;background:var(--paper-2);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:38px 34px;overflow:hidden;
}
.plan.featured{background:var(--ink-900);color:#F7F5F1;border-color:var(--accent)}
.plan.featured::before{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:var(--accent)}
.plan-head{display:flex;align-items:center;gap:12px;margin-bottom:22px}
.plan-name{font-size:20px;font-weight:800;letter-spacing:-.01em}
.plan-tag{
  font-size:12px;font-weight:700;color:#FFFFFF;background:var(--accent-2);
  border-radius:var(--r-pill);padding:3px 12px;
}
.plan-price{font-size:46px;font-weight:900;line-height:1.05;letter-spacing:-.03em;font-variant-numeric:tabular-nums}
.plan-price small{font-size:15px;font-weight:600;color:var(--ink-500);margin-left:6px;letter-spacing:0}
.plan.featured .plan-price small{color:rgba(247,245,241,.6)}
.plan-sep{height:1px;background:var(--line);margin:24px 0}
.plan.featured .plan-sep{background:var(--line-dark)}
.plan-list{margin-bottom:30px}
.plan-list li{display:flex;gap:10px;font-size:15px;line-height:1.7;padding:9px 0}
.plan-list li::before{content:"✓";color:#9CC716;font-weight:900;flex:0 0 auto}
.plan-list li.no{color:var(--ink-500)}
.plan-list li.no::before{content:"—";color:var(--ink-500)}
.plan.featured .plan-list li.no{color:rgba(247,245,241,.45)}
.plan.featured .plan-list li.no::before{color:rgba(247,245,241,.45)}
.plan-note{font-size:13px;color:var(--ink-500);margin-top:14px;text-align:center}
.plan.featured .plan-note{color:rgba(247,245,241,.5)}

/* ===== FAQ ===== */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
  gap:24px;min-height:56px;padding:20px 0;font-size:17.5px;font-weight:500;line-height:1.5;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:#5C6169}
.faq-icon{position:relative;flex:0 0 18px;width:18px;height:18px;transition:transform .28s var(--ease)}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--ink-900);border-radius:1px}
.faq-icon::before{left:0;top:8px;width:18px;height:2px}
.faq-icon::after{left:8px;top:0;width:2px;height:18px}
.faq-item[open] .faq-icon{transform:rotate(45deg)}
.faq-answer{padding:0 0 22px;font-size:15px;line-height:1.9;color:var(--ink-500);max-width:760px}
.faq-item[open] .faq-answer{border-left:3px solid var(--accent);padding-left:18px}

/* ===== 结尾 CTA + 表单 ===== */
.cta-band{
  background:var(--ink-900);color:#F7F5F1;border-radius:var(--r-lg);
  padding:56px;display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center;
}
.cta-text{font-size:16px;line-height:1.85;margin:0 0 30px;max-width:520px}
.field{margin-bottom:18px}
.field label{display:block;font-size:13px;line-height:1.6;color:rgba(247,245,241,.62);margin-bottom:8px}
.input{
  width:100%;height:48px;border-radius:var(--r-sm);border:1px solid var(--line);
  background:#FFFFFF;color:var(--ink-900);padding:0 16px;font-size:15px;
  transition:border-color .2s var(--ease-btn),box-shadow .2s var(--ease-btn);
}
.input::placeholder{color:#9A9E A6}
.input::placeholder{color:#9A9EA6}
.input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 2px rgba(200,241,53,.35)}
.input.error{border-color:var(--accent-2)}
.form-error{display:none;font-size:13px;line-height:1.6;color:var(--accent-2);margin-top:8px}
.form-error.show{display:block}
.form-note{font-size:12.5px;line-height:1.7;color:rgba(247,245,241,.45);margin-top:14px}
.form-note.success{color:var(--accent)}

/* ===== 页脚 ===== */
.footer{background:var(--ink-900);color:#F7F5F1;padding:72px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.1fr;gap:40px}
.footer-brand{font-size:17px;line-height:1.35;font-weight:900;max-width:220px}
.footer-desc{font-size:14px;line-height:1.85;color:rgba(247,245,241,.6);margin-top:16px;max-width:300px}
.footer h4{font-size:13px;line-height:1.6;font-weight:600;letter-spacing:.04em;color:rgba(247,245,241,.55);margin-bottom:16px}
.footer-link{display:inline-block;font-size:14px;line-height:1.6;padding:5px 0;color:rgba(247,245,241,.82);transition:color .2s var(--ease-btn)}
.footer-link:hover{color:var(--accent)}
.footer-contact{font-size:14px;line-height:1.9;color:rgba(247,245,241,.72)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  margin-top:56px;padding-top:22px;border-top:1px solid var(--line-dark);
  font-size:13px;line-height:1.7;color:rgba(247,245,241,.5);
}

/* ===== 浮动 CTA ===== */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:70;
  display:flex;flex-direction:column;line-height:1.25;
  background:var(--accent);color:var(--ink-900);border-radius:var(--r-pill);
  padding:12px 24px;box-shadow:0 10px 30px rgba(14,15,18,.18);
  transition:opacity .3s var(--ease),transform .3s var(--ease),background .2s var(--ease-btn),color .2s var(--ease-btn);
}
.float-cta strong{font-size:15px;font-weight:800}
.float-cta span{font-size:11px;opacity:.72;margin-top:2px}
.float-cta:hover{background:var(--ink-900);color:var(--accent)}
.float-cta.hide{opacity:0;transform:translateY(14px);pointer-events:none}

/* ===== 进场动画 ===== */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ===== 响应式 ===== */
@media (min-width:1440px){
  .container{padding:0 56px}
  .hero-inner{padding:140px 0 120px}
}
@media (max-width:1279px){
  .container{padding:0 40px}
  .proof-stats{grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
}
@media (max-width:1023px){
  .progress-v{display:none}
  .progress-h{display:block}
  .sidenav{display:none}
  .topbar{display:flex}
  .content{margin-left:0;padding-top:64px}
  .container{padding:0 32px}
  .section{padding:72px 0}
  section[id],div[id]{scroll-margin-top:88px}
  .hero-inner{padding:88px 0 84px}
  .hero-jump{right:32px;bottom:32px}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-band{grid-template-columns:1fr;gap:36px;padding:44px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .float-cta{right:16px;bottom:16px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .hero{min-height:600px}
  .hero-inner{padding:72px 0 76px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .hero-stats{grid-template-columns:1fr;gap:18px;margin-top:44px}
  .hero-jump{right:20px;bottom:20px}
  .demo-points{grid-template-columns:1fr}
  .plan-grid{grid-template-columns:1fr}
  .plan.featured{order:-1}
  .plan{padding:32px 24px}
  .proof-stats{grid-template-columns:1fr 1fr;gap:22px}
  .news-grid{grid-template-columns:1fr}
  .feature-item{grid-template-columns:32px minmax(0,1fr);gap:16px;padding:24px 0}
  .feature-title{font-size:19px}
  .faq-item summary{font-size:16.5px;padding:18px 0}
  .cta-band{padding:32px 22px;border-radius:var(--r-md)}
  .footer{padding:56px 0 96px}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;
    flex-direction:row;align-items:center;justify-content:center;gap:10px;
    padding:10px 16px calc(10px + env(safe-area-inset-bottom));min-height:56px;
  }
  .float-cta span{margin-top:0}
}
@media (max-width:520px){
  .hero-title{font-size:clamp(32px,9vw,46px)}
  .hero-title-sub{font-size:17px;margin-top:12px}
  .h2{font-size:26px}
  .lead,.cta-text{font-size:15.5px}
  .proof-stats{grid-template-columns:1fr 1fr}
  .proof-num{font-size:32px}
  .post-title{font-size:17px}
}
@media (max-width:360px){
  .container{padding:0 16px}
  .hero-title{font-size:29px}
  .stat-num{font-size:22px}
  .btn{padding:0 20px;font-size:14px}
  .plan-price{font-size:38px}
}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation:none !important;transition:none !important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

.reveal{opacity:1;transform:none}

/* roulang page: article */
:root{
  --paper:#F7F5F1;
  --paper-2:#FFFFFF;
  --paper-3:#F1EEE8;
  --ink-900:#0E0F12;
  --ink-700:#2A2D33;
  --ink-500:#5C6169;
  --line:#E4E0D8;
  --line-dark:rgba(255,255,255,.08);
  --accent:#C8F135;
  --accent-2:#FF5A2B;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --r-pill:999px;
  --ease:cubic-bezier(.16,.84,.3,1);
  --shadow-hover:0 10px 30px rgba(14,15,18,.08);
  --nav-w:208px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-700);
  font-family:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer}
h1,h2,h3,h4{margin:0;color:var(--ink-900);letter-spacing:-.02em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

/* ---------- 容器与骨架 ---------- */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 40px}
.app{margin-left:var(--nav-w);min-height:100vh;display:flex;flex-direction:column}
.page{width:100%;max-width:1200px;margin:0 auto;padding:0 40px 0}
.page-main{flex:1 1 auto;padding-top:8px}

/* ---------- 滚动进度条 ---------- */
.vprogress{position:fixed;left:0;top:0;width:2px;height:0;background:var(--accent);z-index:90;pointer-events:none}
.hprogress{position:fixed;left:0;top:0;height:2px;width:0;background:var(--accent);z-index:95;pointer-events:none;display:none}

/* ---------- 左侧竖栏 ---------- */
.sidenav{
  position:fixed;
  left:0;top:0;bottom:0;
  width:var(--nav-w);
  background:var(--ink-900);
  border-right:1px solid var(--line-dark);
  padding:28px 18px 22px;
  display:flex;
  flex-direction:column;
  overflow-y:auto;
  z-index:60;
}
.brand-logo{
  display:block;
  color:#FFFFFF;
  font-size:16px;
  font-weight:900;
  line-height:1.3;
  letter-spacing:-.02em;
}
.brand-line{display:block;width:34px;height:2px;background:var(--accent);margin-top:24px}
.brand-note{margin-top:12px;font-size:12px;line-height:1.6;color:#858B94}
.navlist{display:flex;flex-direction:column;margin-top:30px}
.nav-group-title{
  font-size:11px;
  letter-spacing:.14em;
  color:#6B7078;
  margin:18px 0 6px;
  font-weight:600;
}
.navlink{
  position:relative;
  display:block;
  font-size:14px;
  line-height:40px;
  color:#B9BDC4;
  padding:0 10px 0 12px;
  border-radius:var(--r-sm);
  transition:color .2s ease,background .2s ease,transform .2s var(--ease);
}
.navlink::before{
  content:"";
  position:absolute;
  left:0;top:9px;
  width:2px;height:22px;
  background:transparent;
  border-radius:2px;
  transition:background .2s ease;
}
.navlink:hover{color:#FFFFFF;background:rgba(255,255,255,.05)}
.navlink.is-active{color:#FFFFFF;font-weight:700}
.navlink.is-active::before{background:var(--accent)}
.sidenav-foot{margin-top:auto;padding-top:26px}
.sidenav-note{margin-top:12px;font-size:11px;line-height:1.6;color:#6B7078;text-align:center}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:var(--r-pill);
  font-size:15px;
  font-weight:700;
  line-height:1;
  border:1px solid transparent;
  cursor:pointer;
  white-space:nowrap;
  transition:background .2s cubic-bezier(.2,.6,.2,1),color .2s cubic-bezier(.2,.6,.2,1),border-color .2s cubic-bezier(.2,.6,.2,1),transform .2s cubic-bezier(.2,.6,.2,1);
}
.btn-primary{background:var(--accent);color:var(--ink-900)}
.btn-primary:hover{background:var(--ink-900);color:var(--accent)}
.btn-ghost{border-color:var(--ink-900);background:transparent;color:var(--ink-900)}
.btn-ghost:hover{background:var(--ink-900);color:#FFFFFF}
.btn-block{width:100%}
.btn-arrow{transition:transform .2s cubic-bezier(.2,.6,.2,1)}
.btn:hover .btn-arrow{transform:translateX(4px)}
.btn:disabled,.btn[disabled]{opacity:.4;cursor:not-allowed}
.btn.is-loading{pointer-events:none;opacity:.75}
.btn.is-loading::before{
  content:"";
  width:14px;height:14px;
  border:2px solid currentColor;
  border-top-color:transparent;
  border-radius:50%;
  animation:spin .7s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- 移动端顶栏与抽屉 ---------- */
.mobilebar{
  display:none;
  position:fixed;
  left:0;right:0;top:0;
  height:64px;
  padding:0 14px 0 16px;
  background:var(--ink-900);
  border-bottom:1px solid var(--line-dark);
  align-items:center;
  justify-content:space-between;
  z-index:70;
}
.mb-brand{
  color:#FFFFFF;
  font-size:13px;
  font-weight:900;
  line-height:1.25;
  letter-spacing:-.01em;
}
.hamburger{
  width:44px;height:44px;
  background:transparent;
  border:1px solid rgba(255,255,255,.18);
  border-radius:var(--r-sm);
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
  padding:0;
}
.hamburger span{display:block;width:18px;height:2px;background:#FFFFFF;border-radius:2px}
.hamburger:hover{border-color:var(--accent)}
.backdrop{
  position:fixed;inset:0;
  background:rgba(14,15,18,.55);
  opacity:0;pointer-events:none;
  transition:opacity .3s ease;
  z-index:55;
}
.backdrop.show{opacity:1;pointer-events:auto}

/* ---------- 面包屑 ---------- */
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--ink-500);
  padding:34px 0 0;
}
.crumbs a{color:var(--ink-500);transition:color .2s ease}
.crumbs a:hover{color:var(--ink-900);text-decoration:underline;text-decoration-color:var(--accent);text-decoration-thickness:2px;text-underline-offset:3px}
.crumbs .sep{color:#B7B2A8}
.crumbs .current{color:var(--ink-700);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 文章头 ---------- */
.article-head{margin-top:26px}
.badge{
  display:inline-block;
  font-size:12px;
  line-height:1;
  padding:6px 12px;
  border-radius:var(--r-pill);
  border:1px solid var(--accent);
  background:transparent;
  color:var(--ink-900);
  letter-spacing:.02em;
}
.article-title{
  font-size:clamp(28px,4vw,44px);
  line-height:1.18;
  font-weight:900;
  letter-spacing:-.03em;
  margin-top:18px;
  max-width:22ch;
}
.meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--ink-500);
  margin-top:18px;
}
.meta time,.meta span{font-variant-numeric:tabular-nums}
.meta .dot{color:#C2BDB3}
.rule{border:0;border-top:1px solid var(--line);margin:30px 0 0}

/* ---------- 阅读区布局 ---------- */
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,720px);
  gap:56px;
  padding:38px 0 0;
}
.article-body{
  max-width:720px;
  font-size:17px;
  line-height:1.95;
  color:var(--ink-700);
  word-break:break-word;
}
.article-body > p:first-of-type{font-size:18px;color:var(--ink-900)}
.article-body p{margin:0 0 1.4em}
.article-body h2{
  font-size:clamp(22px,2.4vw,28px);
  font-weight:800;
  line-height:1.35;
  color:var(--ink-900);
  margin:2.4em 0 .8em;
  padding-left:14px;
  border-left:3px solid var(--accent);
  scroll-margin-top:24px;
}
.article-body h3{
  font-size:20px;
  font-weight:700;
  line-height:1.4;
  color:var(--ink-900);
  margin:1.8em 0 .6em;
  scroll-margin-top:24px;
}
.article-body h4{font-size:17px;font-weight:700;margin:1.4em 0 .5em}
.article-body ul,.article-body ol{padding-left:1.4em;margin:1.2em 0}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin:8px 0}
.article-body blockquote{
  background:var(--paper-3);
  border-left:3px solid var(--accent);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  padding:16px 20px;
  margin:1.6em 0;
  color:var(--ink-700);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-md);margin:1.6em 0;width:100%;height:auto;object-fit:cover}
.article-body figure{margin:1.6em 0}
.article-body figcaption{font-size:13px;line-height:1.6;color:var(--ink-500);text-align:center;margin-top:10px}
.article-body a{
  color:var(--ink-900);
  text-decoration:underline;
  text-decoration-color:var(--accent);
  text-decoration-thickness:2px;
  text-underline-offset:3px;
  transition:text-decoration-thickness .15s ease;
}
.article-body a:hover{text-decoration-thickness:3px}
.article-body strong{color:var(--ink-900)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2em 0}
.article-body .table-wrap{overflow-x:auto;margin:1.6em 0;border:1px solid var(--line);border-radius:var(--r-sm)}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;min-width:420px}
.article-body th,.article-body td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line)}
.article-body th{background:var(--paper-3);font-weight:700;color:var(--ink-900);font-size:14px}
.article-body tbody tr:nth-child(even){background:#FBF9F6}
.article-body tbody tr:last-child td{border-bottom:0}

/* ---------- 本文目录 ---------- */
.toc{display:none;align-self:start;position:sticky;top:32px}
.toc-title{font-size:12px;letter-spacing:.14em;color:var(--ink-500);margin-bottom:12px;font-weight:600}
.toc nav{display:flex;flex-direction:column;border-left:2px solid var(--line)}
.toc a{
  display:block;
  font-size:13px;
  line-height:1.5;
  color:var(--ink-500);
  padding:6px 0 6px 12px;
  margin-left:-2px;
  border-left:2px solid transparent;
  transition:color .2s ease,border-color .2s ease;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.toc a:hover{color:var(--ink-900)}
.toc a.is-active{color:var(--ink-900);font-weight:700;border-left-color:var(--accent)}

/* ---------- 空态 / 错误态 / 骨架 ---------- */
.empty{
  border:1px dashed var(--line);
  border-radius:var(--r-md);
  padding:44px 24px;
  text-align:center;
  background:var(--paper-2);
}
.empty-title{font-size:18px;font-weight:800;color:var(--ink-900);margin-bottom:8px}
.empty-text{font-size:14px;color:var(--ink-500);margin-bottom:20px}
.state-error{border:1px solid var(--accent-2);border-radius:var(--r-sm);padding:12px 14px;font-size:13px;color:var(--accent-2);background:rgba(255,90,43,.05)}
.skeleton{background:var(--paper-3);border-radius:var(--r-sm);position:relative;overflow:hidden}
.skeleton::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.7),transparent);
  animation:sweep 1.4s infinite;
}
@keyframes sweep{from{transform:translateX(-100%)}to{transform:translateX(100%)}}

/* ---------- 文末推荐 ---------- */
.after-article{margin-top:64px}
.after-title{
  font-size:12px;
  letter-spacing:.14em;
  color:var(--ink-500);
  font-weight:600;
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:20px;
}
.after-title::before{content:"";width:18px;height:2px;background:var(--accent);display:block}
.mini-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.mini-card{
  display:block;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:var(--paper-2);
  overflow:hidden;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.mini-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:var(--accent)}
.mini-card:focus-visible{border-color:var(--accent)}
.mini-thumb{aspect-ratio:16/9;overflow:hidden}
.mini-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.mini-card:hover .mini-thumb img{transform:scale(1.03)}
.mini-body{padding:14px 16px 16px}
.mini-body h3{font-size:15px;line-height:1.45;font-weight:700;margin-bottom:6px}
.mini-body span{font-size:13px;color:var(--ink-500)}
.back-row{margin-top:30px}

/* ---------- 浮动入口 ---------- */
.float-cta{
  position:fixed;
  right:24px;bottom:24px;
  z-index:50;
  background:var(--accent);
  color:var(--ink-900);
  border-radius:var(--r-pill);
  padding:12px 22px;
  display:flex;
  flex-direction:column;
  align-items:center;
  line-height:1.25;
  font-weight:700;
  font-size:15px;
  box-shadow:0 10px 30px rgba(14,15,18,.18);
  transition:opacity .3s ease,transform .3s var(--ease),background .2s ease;
}
.float-cta small{font-size:11px;font-weight:500;opacity:.72}
.float-cta:hover{background:#B8E01F;transform:translateY(-3px)}
.float-cta.is-hidden{opacity:0;transform:translateY(14px);pointer-events:none}

/* ---------- 页脚 ---------- */
.footer{
  background:var(--ink-900);
  color:#F7F5F1;
  margin-top:72px;
  padding:72px 0 28px;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px}
.footer h4{
  font-size:13px;
  font-weight:600;
  color:#858B94;
  margin:0 0 14px;
  letter-spacing:.02em;
}
.footer-brand{font-size:18px;font-weight:900;color:#FFFFFF;letter-spacing:-.02em}
.footer-desc{font-size:14px;line-height:1.8;color:#9AA0A8;margin-top:12px;max-width:330px}
.footer-link{font-size:14px;line-height:2;color:#C9CDD4;transition:color .2s ease}
.footer-link:hover{color:var(--accent)}
.footer-contact{font-size:14px;line-height:2;color:#9AA0A8;margin:0}
.footer-bottom{
  margin-top:48px;
  padding-top:20px;
  border-top:1px solid var(--line-dark);
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  justify-content:space-between;
  font-size:13px;
  color:#7D838B;
}

/* ---------- 进场动画 ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (min-width:1280px){
  .article-layout{grid-template-columns:minmax(0,720px) 220px}
  .toc{display:block}
}
@media (min-width:1440px){
  .container,.page{padding-left:56px;padding-right:56px}
}
@media (max-width:1439px) and (min-width:1024px){
  .page{padding-left:40px;padding-right:40px}
}
@media (max-width:1279px){
  .article-layout{grid-template-columns:minmax(0,720px);gap:0}
}
@media (max-width:1023px){
  .vprogress{display:none}
  .hprogress{display:block}
  .mobilebar{display:flex}
  .sidenav{
    left:auto;right:0;top:0;bottom:0;
    width:84vw;max-width:340px;
    transform:translateX(100%);
    transition:transform .35s var(--ease);
    z-index:65;
    padding-top:26px;
  }
  body.drawer-open .sidenav{transform:none}
  body.drawer-open{overflow:hidden}
  .app{margin-left:0;padding-top:64px}
  .page{padding-left:32px;padding-right:32px}
  .container{padding-left:32px;padding-right:32px}
  .mini-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:767px){
  .page{padding-left:20px;padding-right:20px}
  .container{padding-left:20px;padding-right:20px}
  .crumbs{padding-top:24px}
  .article-title{max-width:none}
  .article-body{font-size:16.5px;line-height:1.9}
  .article-body > p:first-of-type{font-size:17.5px}
  .mini-grid{grid-template-columns:minmax(0,1fr)}
  .footer{padding:56px 0 24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-desc{max-width:none}
  .float-cta{
    left:0;right:0;bottom:0;
    border-radius:0;
    flex-direction:row;
    justify-content:center;
    align-items:center;
    gap:10px;
    height:56px;
    padding:0 16px;
    padding-bottom:env(safe-area-inset-bottom);
    font-size:14px;
    box-shadow:0 -6px 20px rgba(14,15,18,.16);
  }
  .float-cta:hover{transform:none}
  .footer{margin-bottom:56px}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
  .article-title{font-size:26px}
  .article-body{font-size:16px}
}
@media (max-width:360px){
  .article-title{font-size:23px}
  .article-body{font-size:15.5px}
  .btn{padding:0 18px;font-size:14px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category1 */
/* ============ 设计变量 ============ */
:root{
  --paper:#F7F5F1;
  --paper-2:#FFFFFF;
  --paper-3:#F1EEE8;
  --ink-900:#0E0F12;
  --ink-700:#2A2D33;
  --ink-500:#5C6169;
  --line:#E4E0D8;
  --line-dark:rgba(255,255,255,.08);
  --accent:#C8F135;
  --accent-2:#FF5A2B;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --r-pill:999px;
  --nav-w:208px;
  --font:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,-apple-system,sans-serif;
  --mono:'SF Mono',ui-monospace,'JetBrains Mono',Menlo,Consolas,monospace;
  --ease:cubic-bezier(.2,.6,.2,1);
  --ease-out:cubic-bezier(.16,.84,.3,1);
  --pad-block:96px;
}

/* ============ 基础重置 ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:88px}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--ink-900);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote{margin:0;padding:0}
ul,ol{list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
::selection{background:var(--accent);color:var(--ink-900)}

/* ============ 滚动进度条 ============ */
.progress-v{position:fixed;left:0;top:0;width:2px;height:0;background:var(--accent);z-index:120;transition:height .08s linear}
.progress-h{position:fixed;left:0;top:0;height:2px;width:0;background:var(--accent);z-index:120;display:none;transition:width .08s linear}

/* ============ 左侧竖栏导航 ============ */
.sidenav{
  position:fixed;
  left:0;top:0;bottom:0;
  width:var(--nav-w);
  background:var(--ink-900);
  border-right:1px solid var(--line-dark);
  display:flex;
  flex-direction:column;
  padding:30px 20px 24px;
  z-index:100;
}
.brand{flex:0 0 auto}
.brand-logo{
  display:block;
  font-size:16px;
  line-height:1.3;
  font-weight:900;
  letter-spacing:-.01em;
  color:#FFFFFF;
}
.brand-line{display:block;width:28px;height:2px;background:var(--accent);margin-top:24px}
.brand-note{margin-top:10px;font-size:12px;line-height:1.6;color:rgba(255,255,255,.42)}
.navlist{flex:1 1 auto;overflow-y:auto;margin-top:8px;scrollbar-width:thin}
.nav-group-title{
  font-size:12px;
  letter-spacing:.14em;
  color:rgba(255,255,255,.32);
  margin:22px 0 6px;
  padding-left:12px;
}
.navlink{
  position:relative;
  display:flex;
  align-items:center;
  height:40px;
  padding-left:12px;
  font-size:14px;
  color:rgba(255,255,255,.62);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.navlink::before{
  content:"";
  position:absolute;
  left:0;top:9px;bottom:9px;
  width:2px;
  background:transparent;
  transition:background .2s var(--ease);
}
.navlink:hover{color:#fff;background:rgba(255,255,255,.045)}
.navlink.is-active{color:#fff;font-weight:700}
.navlink.is-active::before{background:var(--accent)}
.sidenav-foot{flex:0 0 auto;padding-top:18px;border-top:1px solid var(--line-dark)}
.sidenav-note{margin-top:12px;font-size:11px;line-height:1.6;color:rgba(255,255,255,.36);text-align:center}

/* ============ 按钮体系 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:var(--r-pill);
  font-size:15px;
  font-weight:700;
  letter-spacing:0;
  border:1px solid transparent;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
  white-space:nowrap;
}
.btn-arrow{transition:transform .2s var(--ease);display:inline-block}
.btn-primary{background:var(--accent);color:var(--ink-900);border-color:var(--accent)}
.btn-primary:hover{background:var(--ink-900);color:var(--accent);border-color:var(--accent)}
.btn-primary:hover .btn-arrow{transform:translateX(4px)}
.btn-ghost{background:transparent;color:var(--ink-900);border-color:var(--ink-900)}
.btn-ghost:hover{background:var(--ink-900);color:#fff}
.btn-outline-light{background:transparent;color:#F7F5F1;border-color:rgba(255,255,255,.4)}
.btn-outline-light:hover{background:#F7F5F1;color:var(--ink-900);border-color:#F7F5F1}
.btn-block{width:100%}
.btn:disabled,.btn.is-disabled{opacity:.4;cursor:not-allowed}
.link-text{
  color:var(--ink-900);
  font-weight:700;
  border-bottom:2px solid var(--accent);
  padding-bottom:2px;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.link-text:hover{border-bottom-color:var(--ink-900)}

/* ============ 移动端顶栏 + 抽屉 ============ */
.topbar{
  display:none;
  position:sticky;
  top:0;
  z-index:110;
  height:64px;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:0 16px;
  background:var(--ink-900);
  border-bottom:1px solid var(--line-dark);
}
.topbar-logo{font-size:14px;line-height:1.25;font-weight:900;color:#fff}
.nav-toggle{
  width:44px;height:44px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  border-radius:var(--r-sm);
  border:1px solid rgba(255,255,255,.14);
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--accent);transition:transform .25s var(--ease),opacity .25s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.drawer{
  position:fixed;
  top:0;right:0;bottom:0;
  width:84vw;
  max-width:380px;
  background:var(--ink-900);
  z-index:130;
  transform:translateX(102%);
  transition:transform .32s var(--ease-out);
  display:flex;
  flex-direction:column;
  padding:28px 22px calc(24px + env(safe-area-inset-bottom));
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-group{font-size:12px;letter-spacing:.14em;color:rgba(255,255,255,.32);margin:20px 0 6px}
.drawer-link{display:block;font-size:18px;line-height:48px;color:rgba(255,255,255,.72);border-bottom:1px solid var(--line-dark);transition:color .2s var(--ease),padding-left .2s var(--ease)}
.drawer-link:hover,.drawer-link.is-active{color:#fff;padding-left:8px}
.drawer-link.is-active{font-weight:700}
.drawer-foot{margin-top:auto;padding-top:24px}
.drawer-note{margin-top:12px;font-size:11px;color:rgba(255,255,255,.36);text-align:center}
.drawer-mask{
  position:fixed;
  inset:0;
  background:rgba(14,15,18,.55);
  opacity:0;
  pointer-events:none;
  transition:opacity .3s var(--ease);
  z-index:125;
}
.drawer-mask.is-show{opacity:1;pointer-events:auto}

/* ============ 布局容器 ============ */
.content{margin-left:var(--nav-w);min-height:60vh}
.container{max-width:1200px;margin:0 auto;padding:0 24px}

/* ============ 分类页首屏 ============ */
.cat-hero{
  position:relative;
  min-height:520px;
  display:flex;
  align-items:center;
  padding:96px 0 84px;
  background:var(--ink-900) url("/assets/images/backpic/back-2.png") center/cover no-repeat;
  color:#F7F5F1;
  overflow:hidden;
}
.cat-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:
    repeating-linear-gradient(90deg,rgba(255,255,255,.05) 0 1px,transparent 1px 72px),
    rgba(14,15,18,.82);
}
.cat-hero .container{position:relative;z-index:2}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:12px;
  letter-spacing:.14em;
  color:rgba(255,255,255,.62);
  text-transform:uppercase;
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--accent)}
.cat-title{
  margin-top:18px;
  font-size:clamp(34px,4.8vw,58px);
  line-height:1.06;
  font-weight:900;
  letter-spacing:-.03em;
  color:#FFFFFF;
}
.lede{
  margin-top:22px;
  max-width:660px;
  font-size:17px;
  line-height:1.9;
  color:rgba(255,255,255,.78);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px}
.hero-meta{
  display:flex;
  flex-wrap:wrap;
  gap:28px;
  margin-top:48px;
  padding-top:24px;
  border-top:1px solid rgba(255,255,255,.12);
}
.hero-meta div{min-width:120px}
.hero-meta strong{
  display:block;
  font-family:var(--mono);
  font-size:24px;
  font-weight:800;
  color:var(--accent);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.01em;
}
.hero-meta span{font-size:13px;color:rgba(255,255,255,.5)}

/* ============ 页内锚点子导航 ============ */
.anchor-nav{
  position:sticky;
  top:0;
  z-index:90;
  height:56px;
  background:rgba(247,245,241,.94);
  border-bottom:1px solid var(--line);
  display:flex;
  align-items:center;
}
.anchor-nav .container{display:flex;align-items:center;gap:4px;overflow-x:auto;scrollbar-width:none}
.anchor-nav .container::-webkit-scrollbar{display:none}
.anchor-link{
  height:56px;
  display:inline-flex;
  align-items:center;
  padding:0 14px;
  font-size:14px;
  color:var(--ink-500);
  border-bottom:2px solid transparent;
  white-space:nowrap;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.anchor-link:hover{color:var(--ink-900)}
.anchor-link.is-active{color:var(--ink-900);font-weight:700;border-bottom-color:var(--accent)}

/* ============ 分组列表 ============ */
.group{padding:var(--pad-block) 0 0}
.group:first-of-type{padding-top:72px}
.group-head{margin-bottom:26px}
.group-head h2{
  position:relative;
  padding-left:16px;
  font-size:clamp(24px,2.7vw,34px);
  line-height:1.2;
  font-weight:800;
  letter-spacing:-.02em;
}
.group-head h2::before{
  content:"";
  position:absolute;
  left:0;top:.28em;
  width:3px;height:.92em;
  background:var(--accent);
}
.group-head p{margin-top:12px;font-size:14.5px;color:var(--ink-500);max-width:760px}
.glist{display:block}
.gitem{
  display:grid;
  grid-template-columns:48px 1fr;
  gap:20px;
  align-items:start;
  padding:22px 10px 22px 0;
  border-bottom:1px solid var(--line);
  transition:transform .22s var(--ease),background .22s var(--ease);
}
.gitem:last-child{border-bottom:0}
.gitem:hover{transform:translateX(4px)}
.gitem:hover .gitem-num{background:var(--accent);color:var(--ink-900);border-color:var(--accent)}
.gitem-num{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:40px;height:28px;
  font-family:var(--mono);
  font-size:14px;
  font-weight:700;
  font-variant-numeric:tabular-nums;
  letter-spacing:.04em;
  color:var(--ink-500);
  background:transparent;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.gitem-body h3{
  font-size:21px;
  line-height:1.35;
  font-weight:800;
  letter-spacing:-.01em;
}
.gitem-body p{margin-top:7px;font-size:15.5px;line-height:1.8;color:var(--ink-500);max-width:820px}
.gitem-body code{
  font-family:var(--mono);
  font-size:14px;
  background:var(--paper-3);
  padding:2px 6px;
  border-radius:4px;
}

/* ============ 横幅图 ============ */
.banner-figure{padding:56px 0 0}
.banner-img{
  width:100%;
  height:auto;
  aspect-ratio:16/6;
  object-fit:cover;
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  transition:transform .5s var(--ease-out);
}
.banner-frame{overflow:hidden;border-radius:var(--r-lg)}
.banner-frame:hover .banner-img{transform:scale(1.03)}
.banner-figure figcaption{margin-top:12px;font-size:13px;line-height:1.7;color:var(--ink-500);text-align:center}

/* ============ 证据带 ============ */
.proof{background:var(--ink-900);color:#F7F5F1;margin-top:var(--pad-block);padding:72px 0}
.proof-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.proof-num{
  font-family:var(--mono);
  font-size:clamp(30px,3.4vw,44px);
  font-weight:800;
  color:var(--accent);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
  line-height:1.1;
}
.proof-desc{margin-top:8px;font-size:13px;line-height:1.7;color:rgba(255,255,255,.55)}
.proof-quote{
  margin-top:44px;
  padding-left:16px;
  border-left:3px solid var(--accent);
  max-width:820px;
  font-size:15.5px;
  line-height:1.9;
  color:rgba(255,255,255,.82);
}
.proof-trust{margin-top:24px;padding-top:18px;border-top:1px solid var(--line-dark);font-size:13px;color:rgba(255,255,255,.42)}

/* ============ 结尾 CTA ============ */
.cta-block{padding:var(--pad-block) 0}
.cta-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:36px;
  padding:48px;
  background:var(--paper-2);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
}
.cta-inner h2{font-size:clamp(24px,2.6vw,34px);line-height:1.2;font-weight:800;letter-spacing:-.02em}
.cta-inner p{margin-top:12px;font-size:15.5px;color:var(--ink-500);max-width:560px}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;
  right:24px;
  bottom:24px;
  z-index:115;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  padding:12px 26px;
  background:var(--accent);
  color:var(--ink-900);
  border-radius:var(--r-pill);
  box-shadow:0 10px 30px rgba(14,15,18,.18);
  transition:opacity .3s var(--ease),transform .3s var(--ease),box-shadow .3s var(--ease);
}
.float-cta strong{font-size:15px;font-weight:900;line-height:1.4;display:flex;align-items:center;gap:6px}
.float-cta span{font-size:11px;line-height:1.4;opacity:.72}
.float-cta:hover{transform:translateY(-3px);box-shadow:0 14px 36px rgba(14,15,18,.22)}
.float-cta.is-hidden{opacity:0;transform:translateY(14px);pointer-events:none}

/* ============ 页脚 ============ */
.footer{
  margin-left:var(--nav-w);
  background:var(--ink-900);
  color:#F7F5F1;
  padding:72px 0 28px;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px}
.footer-brand{font-size:18px;font-weight:900;letter-spacing:-.01em}
.footer-desc{margin-top:14px;font-size:14px;line-height:1.9;color:rgba(255,255,255,.55);max-width:34ch}
.footer h4{font-size:13px;font-weight:600;letter-spacing:.08em;color:rgba(255,255,255,.45);margin-bottom:14px}
.footer-link{font-size:14px;line-height:2.1;color:rgba(255,255,255,.7);transition:color .2s var(--ease)}
.footer-link:hover{color:var(--accent)}
.footer-contact{font-size:14px;line-height:2.1;color:rgba(255,255,255,.6)}
.footer-bottom{
  margin-top:48px;
  padding-top:20px;
  border-top:1px solid var(--line-dark);
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:10px;
  font-size:13px;
  color:rgba(255,255,255,.4);
}

/* ============ 进场动效 ============ */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s var(--ease-out),transform .6s var(--ease-out)}
.reveal.is-in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

/* ============ 响应式 ============ */
@media (min-width:1440px){
  .container{padding:0 40px}
}
@media (max-width:1279px){
  .container{padding:0 40px}
  :root{--pad-block:80px}
}
@media (max-width:1023px){
  :root{--pad-block:72px}
  .sidenav{display:none}
  .progress-v{display:none}
  .progress-h{display:block}
  .topbar{display:flex}
  .content,.footer{margin-left:0}
  .anchor-nav{top:64px}
  html{scroll-padding-top:132px}
  .proof-grid{grid-template-columns:1fr 1fr;gap:32px 24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px 24px}
  .cta-inner{padding:40px}
  .cat-hero{min-height:460px;padding:80px 0 68px}
}
@media (max-width:767px){
  :root{--pad-block:56px}
  body{font-size:15.5px}
  .container{padding:0 18px}
  .cat-hero{min-height:420px;padding:64px 0 56px}
  .lede{font-size:16px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .hero-meta{gap:20px;margin-top:36px}
  .hero-meta div{min-width:calc(50% - 10px)}
  .gitem{grid-template-columns:38px 1fr;gap:14px;padding:20px 0}
  .gitem-num{width:34px;height:26px;font-size:13px}
  .gitem-body h3{font-size:19px}
  .gitem-body p{font-size:15px}
  .banner-img{aspect-ratio:16/10}
  .proof{padding:56px 0}
  .cta-inner{flex-direction:column;align-items:flex-start;padding:32px 24px;gap:24px}
  .cta-inner .btn{width:100%}
  .footer{margin-left:0;padding:56px 0 24px}
  .float-cta{
    left:0;right:0;bottom:0;
    flex-direction:row;
    gap:10px;
    border-radius:0;
    padding:0 18px calc(0px + env(safe-area-inset-bottom));
    height:56px;
    box-shadow:0 -6px 20px rgba(14,15,18,.16);
  }
  .float-cta strong{font-size:15px}
  .float-cta span{font-size:11px}
  .float-cta:hover{transform:none}
  .footer-bottom{padding-bottom:64px}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr}
  .proof-grid{grid-template-columns:1fr 1fr;gap:26px 18px}
  .anchor-link{padding:0 10px;font-size:13.5px}
}
@media (max-width:360px){
  .cat-title{font-size:30px}
  .lede{font-size:15px}
  .gitem-body h3{font-size:17.5px}
  .proof-num{font-size:26px}
  .btn{padding:0 18px;font-size:14px}
}

/* roulang page: category2 */
/* ===== 设计变量 ===== */
:root{
  --paper:#F7F5F1;
  --paper-2:#FFFFFF;
  --paper-3:#F1EEE8;
  --ink-900:#0E0F12;
  --ink-700:#2A2D33;
  --ink-500:#5C6169;
  --line:#E4E0D8;
  --line-dark:rgba(255,255,255,.08);
  --accent:#C8F135;
  --accent-2:#FF5A2B;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --r-pill:999px;
  --font:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,-apple-system,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --ease:cubic-bezier(.16,.84,.3,1);
  --shadow-hover:0 10px 30px rgba(14,15,18,.08);
  --nav-w:208px;
}

/* ===== reset / base ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--ink-900);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,p,figure,blockquote,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
::selection{background:var(--accent);color:var(--ink-900)}

/* ===== 通用容器与文本 ===== */
.page{margin-left:var(--nav-w);min-height:100vh;display:flex;flex-direction:column}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 40px}
.section{padding:96px 0}
.section-tight{padding:72px 0}
.section-alt{background:var(--paper-3)}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;letter-spacing:.14em;color:var(--ink-500);
  font-weight:600;text-transform:uppercase;
}
.eyebrow::before{content:"";display:block;width:18px;height:2px;background:var(--accent);flex:0 0 auto}

.h2{
  font-size:clamp(28px,3.4vw,44px);
  line-height:1.15;
  font-weight:900;
  letter-spacing:-.02em;
  margin-top:16px;
}
.section-lead{
  margin-top:16px;color:var(--ink-500);font-size:16px;max-width:64ch;
}
.section-head{max-width:760px}

/* ===== 按钮系统 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-pill);
  font-size:15px;font-weight:700;line-height:1;letter-spacing:.01em;
  transition:background-color .2s cubic-bezier(.2,.6,.2,1),color .2s cubic-bezier(.2,.6,.2,1),border-color .2s cubic-bezier(.2,.6,.2,1),transform .2s cubic-bezier(.2,.6,.2,1),box-shadow .2s cubic-bezier(.2,.6,.2,1);
  white-space:nowrap;
}
.btn-arrow{transition:transform .2s cubic-bezier(.2,.6,.2,1)}
.btn:hover .btn-arrow{transform:translateX(4px)}

.btn-primary{background:var(--accent);color:var(--ink-900);border:1px solid var(--accent)}
.btn-primary:hover{background:var(--ink-900);color:var(--accent);border-color:var(--ink-900)}

.btn-secondary{background:transparent;color:var(--ink-900);border:1px solid var(--ink-900)}
.btn-secondary:hover{background:var(--ink-900);color:#F7F5F1}

.btn-ghost{background:transparent;color:#F7F5F1;border:1px solid rgba(255,255,255,.28)}
.btn-ghost:hover{background:#F7F5F1;color:var(--ink-900);border-color:#F7F5F1}

.btn-block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none!important}

.link-text{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:700;color:var(--ink-900);
  text-decoration:underline;
  text-decoration-color:var(--accent);
  text-decoration-thickness:1px;
  text-underline-offset:3px;
  transition:text-decoration-thickness .15s linear,color .2s linear;
}
.link-text:hover{text-decoration-thickness:2px}
.link-text .btn-arrow{transition:transform .2s cubic-bezier(.2,.6,.2,1)}
.link-text:hover .btn-arrow{transform:translateX(4px)}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 10px;border-radius:var(--r-pill);
  font-size:12px;font-weight:700;letter-spacing:.04em;
  background:transparent;border:1px solid var(--accent);color:var(--ink-900);
}
.badge-warn{border-color:var(--accent-2);color:var(--accent-2)}

/* ===== 左侧竖栏导航 ===== */
.sidenav{
  position:fixed;top:0;left:0;bottom:0;width:var(--nav-w);
  background:var(--ink-900);
  border-right:1px solid var(--line-dark);
  display:flex;flex-direction:column;
  padding:30px 20px 24px;
  z-index:60;
  overflow-y:auto;
  overflow-x:hidden;
}
.sidenav::-webkit-scrollbar{width:4px}
.sidenav::-webkit-scrollbar-thumb{background:rgba(255,255,255,.12);border-radius:2px}
.brand{padding-left:2px}
.brand-logo{
  display:block;
  font-size:16px;line-height:1.3;font-weight:900;letter-spacing:-.02em;
  color:#F7F5F1;
}
.brand-logo:hover{color:var(--accent)}
.brand-line{display:block;width:28px;height:2px;background:var(--accent);margin-top:20px}
.brand-note{
  margin-top:12px;font-size:12px;line-height:1.6;
  color:rgba(247,245,241,.5);
}
.navlist{margin-top:26px;display:flex;flex-direction:column}
.nav-group-title{
  font-size:11px;letter-spacing:.16em;font-weight:700;
  color:rgba(247,245,241,.38);
  margin:20px 0 6px;padding-left:12px;
}
.nav-group-title:first-child{margin-top:0}
.navlink{
  position:relative;
  display:flex;align-items:center;
  height:40px;padding-left:12px;
  font-size:14px;color:rgba(247,245,241,.72);
  transition:color .2s linear,padding-left .2s var(--ease);
}
.navlink::before{
  content:"";position:absolute;left:0;top:50%;
  width:2px;height:0;background:var(--accent);
  transform:translateY(-50%);
  transition:height .25s var(--ease);
}
.navlink:hover{color:#F7F5F1;padding-left:15px}
.navlink.is-active{color:#FFFFFF;font-weight:700}
.navlink.is-active::before{height:18px}
.sidenav-foot{margin-top:auto;padding-top:28px}
.sidenav-note{
  margin-top:12px;font-size:11px;line-height:1.6;
  color:rgba(247,245,241,.42);text-align:center;
}
.sidenav .btn-primary:hover{border-color:var(--accent);box-shadow:none}

/* ===== 移动端顶栏与抽屉 ===== */
.topbar{
  display:none;
  position:sticky;top:0;z-index:60;
  height:64px;padding:0 16px;
  background:rgba(14,15,18,.97);
  border-bottom:1px solid var(--line-dark);
  align-items:center;justify-content:space-between;gap:12px;
}
.topbar-brand{
  font-size:12px;line-height:1.25;font-weight:900;letter-spacing:-.01em;
  color:#F7F5F1;max-width:60%;
}
.hamburger{
  width:44px;height:44px;border-radius:var(--r-sm);
  border:1px solid var(--line-dark);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  transition:border-color .2s linear,background-color .2s linear;
}
.hamburger:hover{border-color:var(--accent)}
.hamburger span{display:block;width:18px;height:2px;background:#F7F5F1;transition:background-color .2s linear}
.hamburger:hover span{background:var(--accent)}

.drawer{
  position:fixed;top:0;right:0;bottom:0;
  width:84vw;max-width:360px;
  background:var(--ink-900);color:#F7F5F1;
  z-index:90;
  display:flex;flex-direction:column;
  padding:24px 20px calc(24px + env(safe-area-inset-bottom));
  transform:translateX(105%);
  transition:transform .35s var(--ease);
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}
.drawer-title{font-size:14px;font-weight:900;line-height:1.3;letter-spacing:-.01em}
.drawer-close{
  width:38px;height:38px;border-radius:var(--r-sm);
  border:1px solid var(--line-dark);color:#F7F5F1;font-size:18px;line-height:1;
  display:flex;align-items:center;justify-content:center;
  transition:border-color .2s linear,color .2s linear;
}
.drawer-close:hover{border-color:var(--accent);color:var(--accent)}
.drawer-group{margin-top:22px;font-size:11px;letter-spacing:.16em;color:rgba(247,245,241,.4);font-weight:700}
.drawer-link{
  display:block;font-size:18px;line-height:48px;
  color:rgba(247,245,241,.82);
  border-bottom:1px solid var(--line-dark);
  transition:color .2s linear,padding-left .2s var(--ease);
}
.drawer-link:hover{color:var(--accent);padding-left:6px}
.drawer-link.is-active{color:#fff;font-weight:700}
.drawer-foot{margin-top:auto;padding-top:24px}
.drawer-mask{
  position:fixed;inset:0;background:rgba(14,15,18,.55);
  opacity:0;pointer-events:none;z-index:85;
  transition:opacity .3s linear;
}
.drawer-mask.is-open{opacity:1;pointer-events:auto}

/* ===== 滚动进度条 ===== */
.progress-v{
  position:fixed;left:0;top:0;width:2px;height:0;
  background:var(--accent);z-index:80;pointer-events:none;
}
.progress-h{
  display:none;position:fixed;left:0;top:63px;height:2px;width:0;
  background:var(--accent);z-index:80;pointer-events:none;
}

/* ===== 面包屑 ===== */
.crumb{
  padding:28px 0 0;
  font-size:13px;color:var(--ink-500);
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
}
.crumb a{transition:color .2s linear}
.crumb a:hover{color:var(--ink-900)}
.crumb-sep{color:var(--line);}
.crumb-current{color:var(--ink-700);font-weight:600}

/* ===== Hero ===== */
.hero{
  position:relative;
  padding:40px 0 88px;
  border-bottom:1px solid var(--line);
  background-image:repeating-linear-gradient(90deg,rgba(14,15,18,.035) 0 1px,transparent 1px 96px);
}
.hero-grid{
  display:grid;grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr);
  gap:56px;align-items:center;
}
.h1{
  font-size:clamp(40px,6.2vw,84px);
  line-height:.98;font-weight:900;letter-spacing:-.03em;
  margin-top:20px;
}
.hero-sub{
  margin-top:20px;font-size:clamp(17px,1.6vw,22px);font-weight:500;
  color:var(--ink-700);letter-spacing:-.01em;max-width:22em;
}
.hero-lead{
  margin-top:16px;font-size:16px;line-height:1.9;color:var(--ink-500);max-width:38em;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-stats{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;margin-top:48px;padding-top:26px;
  border-top:1px solid var(--line);
}
.stat-num{
  font-size:clamp(26px,2.8vw,38px);font-weight:900;letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;line-height:1.05;
}
.stat-num small{font-size:15px;font-weight:700;margin-left:4px;letter-spacing:0}
.stat-label{margin-top:8px;font-size:13px;line-height:1.6;color:var(--ink-500)}
.hero-figure{position:relative}
.hero-figure-img{
  width:100%;aspect-ratio:4/5;object-fit:cover;
  border-radius:var(--r-lg);border:1px solid var(--line);
}
.hero-figure-tag{
  position:absolute;left:16px;bottom:16px;
  background:var(--paper-2);border:1px solid var(--line);
  border-radius:var(--r-pill);padding:7px 14px;
  font-size:12px;font-weight:700;letter-spacing:.03em;
  display:inline-flex;align-items:center;gap:8px;
}
.hero-figure-tag::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--accent)}

/* ===== 卡片网格 ===== */
.cards{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;margin-top:44px;
}
.card{
  background:var(--paper-2);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  overflow:hidden;
  box-shadow:0 1px 0 rgba(14,15,18,.04);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s linear;
  display:flex;flex-direction:column;
}
.card:hover,.card:focus-within{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:#D8D3C7}
.card-media{aspect-ratio:16/9;overflow:hidden;background:var(--paper-3)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:24px 24px 26px;display:flex;flex-direction:column;flex:1}
.card h3{font-size:22px;line-height:1.3;font-weight:800;letter-spacing:-.01em}
.card p{margin-top:10px;font-size:15px;line-height:1.85;color:var(--ink-500)}
.card .card-foot{margin-top:auto;padding-top:18px}
.card-tag{
  align-self:flex-start;font-size:11px;font-weight:700;letter-spacing:.1em;
  color:var(--ink-500);margin-bottom:12px;text-transform:uppercase;
}

/* ===== 对比条 ===== */
.compare-grid{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;margin-top:44px;align-items:stretch;
}
.compare-col{
  position:relative;
  background:var(--paper-2);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:28px 24px 30px;
  display:flex;flex-direction:column;
}
.compare-col h3{font-size:20px;font-weight:800;line-height:1.35;letter-spacing:-.01em}
.compare-col .col-note{margin-top:8px;font-size:13px;color:var(--ink-500);line-height:1.7}
.compare-list{margin-top:20px;padding-top:18px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:12px}
.compare-list li{
  position:relative;padding-left:24px;font-size:14px;line-height:1.75;color:var(--ink-700);
}
.compare-list li::before{
  content:"";position:absolute;left:0;top:9px;width:12px;height:2px;background:var(--ink-500);
}
.compare-col.is-featured{
  background:var(--ink-900);color:#F7F5F1;
  border:1px solid var(--accent);
  box-shadow:none;
}
.compare-col.is-featured::before{
  content:"";position:absolute;left:-1px;right:-1px;top:-1px;height:3px;
  background:var(--accent);border-radius:var(--r-md) var(--r-md) 0 0;
}
.compare-col.is-featured .col-note{color:rgba(247,245,241,.6)}
.compare-col.is-featured .compare-list{border-top-color:var(--line-dark)}
.compare-col.is-featured .compare-list li{color:rgba(247,245,241,.86)}
.compare-col.is-featured .compare-list li::before{background:var(--accent);width:14px;height:2px}
.compare-col.is-featured .badge{margin-top:18px;align-self:flex-start}

/* ===== FAQ ===== */
.faq-list{margin-top:40px;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line);position:relative}
.faq-item summary{
  position:relative;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:64px;padding:16px 0 16px 0;
  font-size:17px;font-weight:500;line-height:1.6;
  cursor:pointer;list-style:none;
  transition:color .2s linear;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--ink-700)}
.faq-item summary::before{
  content:"";position:absolute;left:-14px;top:14px;bottom:14px;width:3px;
  background:transparent;transition:background-color .2s linear;
}
.faq-item[open] summary::before{background:var(--accent)}
.faq-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  font-size:16px;line-height:1;color:var(--ink-700);
  transition:transform .3s var(--ease),border-color .2s linear,color .2s linear;
}
.faq-item[open] .faq-icon{transform:rotate(45deg);border-color:var(--accent);color:var(--ink-900)}
.faq-answer{
  padding:0 0 24px;font-size:15px;line-height:1.9;color:var(--ink-700);
  max-width:76ch;
}

/* ===== CTA 区 ===== */
.cta-band{
  background:var(--ink-900);color:#F7F5F1;
  border-radius:var(--r-lg);
  padding:56px;
  display:grid;grid-template-columns:minmax(0,1.25fr) auto;
  gap:36px;align-items:center;
}
.cta-band h2{
  font-size:clamp(26px,3vw,40px);line-height:1.15;font-weight:900;letter-spacing:-.02em;
}
.cta-band p{margin-top:14px;font-size:15px;line-height:1.85;color:rgba(247,245,241,.68);max-width:52ch}
.cta-actions{display:flex;flex-direction:column;gap:12px;min-width:220px}

/* ===== 页脚 ===== */
.footer{
  margin-top:96px;
  background:var(--ink-900);color:#F7F5F1;
  padding:72px 0 28px;
}
.footer-grid{
  display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:40px;
}
.footer-brand{
  font-size:16px;font-weight:900;letter-spacing:-.02em;line-height:1.4;
}
.footer-desc{
  margin-top:14px;font-size:14px;line-height:1.85;color:rgba(247,245,241,.6);max-width:38ch;
}
.footer h4{
  font-size:13px;font-weight:700;letter-spacing:.1em;color:rgba(247,245,241,.45);
  margin-bottom:14px;
}
.footer-link{
  font-size:14px;line-height:2;color:rgba(247,245,241,.72);
  transition:color .2s linear;
}
.footer-link:hover{color:var(--accent)}
.footer-contact{font-size:14px;line-height:2;color:rgba(247,245,241,.72)}
.footer-bottom{
  margin-top:56px;padding-top:22px;
  border-top:1px solid var(--line-dark);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:rgba(247,245,241,.45);
}

/* ===== 浮动 CTA ===== */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:70;
  background:var(--accent);color:var(--ink-900);
  border-radius:var(--r-pill);
  padding:12px 22px;
  display:flex;flex-direction:column;align-items:center;gap:2px;
  line-height:1.2;font-weight:800;font-size:15px;
  box-shadow:0 10px 30px rgba(14,15,18,.18);
  transition:opacity .3s linear,transform .3s var(--ease),background-color .2s linear,color .2s linear;
}
.float-cta small{font-size:11px;font-weight:600;opacity:.65}
.float-cta:hover{background:var(--ink-900);color:var(--accent)}
.float-cta.is-hidden{opacity:0;pointer-events:none;transform:translateY(12px)}

/* ===== 状态样式 ===== */
.skeleton{
  background:var(--paper-3);border-radius:var(--r-sm);position:relative;overflow:hidden;
}
.skeleton::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.7),transparent);
  transform:translateX(-100%);
  animation:shimmer 1.4s infinite;
}
@keyframes shimmer{to{transform:translateX(100%)}}
.state-empty{
  border:1px dashed var(--line);border-radius:var(--r-md);
  padding:32px;text-align:center;color:var(--ink-500);font-size:15px;
  background:var(--paper-2);
}
.state-empty p{margin-bottom:16px}
.state-error{
  border:1px solid var(--accent-2);border-radius:var(--r-sm);
  padding:14px 16px;color:var(--accent-2);font-size:13px;line-height:1.7;
  background:rgba(255,90,43,.05);
}

/* ===== 进场动效 ===== */
.js .reveal{opacity:0;transform:translateY(14px)}
.js .reveal.is-in{
  opacity:1;transform:none;
  transition:opacity .6s var(--ease),transform .6s var(--ease);
}

/* ===== 响应式 ===== */
@media (max-width:1439px){
  .container{padding:0 40px}
}
@media (max-width:1279px){
  .container{padding:0 40px}
  .hero-grid{gap:40px}
  .section{padding:80px 0}
}
@media (max-width:1023px){
  .sidenav{display:none}
  .progress-v{display:none}
  .progress-h{display:block}
  .topbar{display:flex}
  .page{margin-left:0}
  .container{padding:0 24px}
  .hero{padding:28px 0 64px}
  .hero-grid{grid-template-columns:minmax(0,1fr);gap:36px}
  .hero-figure{max-width:520px}
  .hero-figure-img{aspect-ratio:16/10}
  .section{padding:72px 0}
  .cards{grid-template-columns:repeat(2,minmax(0,1fr))}
  .compare-grid{grid-template-columns:minmax(0,1fr)}
  .compare-col.is-featured{order:-1}
  .cta-band{grid-template-columns:minmax(0,1fr);padding:44px 32px}
  .cta-actions{flex-direction:row;flex-wrap:wrap;min-width:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .section{padding:56px 0}
  .h1{font-size:clamp(34px,9vw,52px);line-height:1.04}
  .hero-sub{font-size:17px}
  .hero-stats{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
  .stat-num{font-size:24px}
  .stat-label{font-size:12px}
  .cards{grid-template-columns:minmax(0,1fr);gap:18px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .footer{margin-top:64px;padding:56px 0 24px}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .faq-item summary{font-size:16px}
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;
    padding:12px 16px calc(12px + env(safe-area-inset-bottom));
    flex-direction:row;justify-content:center;gap:10px;
  }
  .float-cta.is-hidden{transform:translateY(100%)}
  .cta-band{padding:36px 22px}
  .cta-actions{flex-direction:column;align-items:stretch}
}
@media (max-width:479px){
  .container{padding:0 18px}
  .hero-stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
  .card-body{padding:20px 18px 22px}
  .card h3{font-size:20px}
}
@media (max-width:360px){
  body{font-size:15px}
  .h1{font-size:30px}
  .h2{font-size:24px}
  .stat-num{font-size:21px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  .js .reveal{opacity:1;transform:none}
}