/* roulang page: index */
:root{
  --bg:#F7F5F1;
  --surface:#FFFFFF;
  --surface-2:#EFECE6;
  --dark:#101216;
  --dark-2:#1B1E24;
  --ink:#101216;
  --ink-2:#4A5058;
  --ink-3:#8A9099;
  --line:#E7E3DC;
  --line-dark:rgba(255,255,255,.12);
  --brand:#FF5A1F;
  --brand-600:#E64A12;
  --brand-soft:#FFEDE5;
  --accent:#6D4AFF;
  --accent-soft:#EDE8FF;
  --ok:#1F9D6B;
  --warn:#C98A00;
  --err:#D93B3B;
  --r-sm:6px;
  --r-md:10px;
  --r-lg:16px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,18,22,.06);
  --sh-2:0 10px 28px -14px rgba(16,18,22,.22);
  --sh-3:0 24px 60px -28px rgba(16,18,22,.32);
  --focus:0 0 0 3px rgba(255,90,31,.30);
  --ease:cubic-bezier(.2,.7,.3,1);
  --dur:240ms;
  --sec:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p,figure{margin:0}
:focus-visible{outline:none;box-shadow:var(--focus);border-radius:var(--r-sm)}
::selection{background:var(--brand-soft);color:var(--brand-600)}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:var(--sec) 0}
.section-title{font-size:clamp(28px,3.4vw,40px);font-weight:800;line-height:1.2;letter-spacing:-.01em}
.section-sub{margin-top:14px;font-size:16px;color:var(--ink-2);max-width:640px}
.eyebrow{display:inline-block;font-size:13px;font-weight:500;letter-spacing:.08em;color:var(--ink-3)}
.hr{height:1px;background:var(--line);border:0;margin:0}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--dark);color:rgba(255,255,255,.78)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:36px;gap:16px}
.topbar-note{font-size:12px;letter-spacing:.02em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-right{display:flex;align-items:center;gap:18px;flex:0 0 auto}
.topbar-link{font-size:12px;color:rgba(255,255,255,.6);transition:color var(--dur) var(--ease)}
.topbar-link:hover{color:#fff}
.topbar-cta{font-size:13px;font-weight:600;color:var(--brand);transition:color var(--dur) var(--ease)}
.topbar-cta:hover{color:#FFB08C}

/* ---------- 主导航 ---------- */
.mainnav{
  position:sticky;top:0;z-index:120;
  background:rgba(247,245,241,.92);
  backdrop-filter:saturate(1.4) blur(12px);
  border-bottom:1px solid transparent;
  transition:background var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.mainnav.is-scrolled{background:var(--surface);border-bottom-color:var(--line);box-shadow:var(--sh-1)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.logo{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.logo-mark{
  width:42px;height:42px;border-radius:12px;background:var(--dark);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:900;letter-spacing:.05em;
}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-main{font-size:20px;font-weight:900;letter-spacing:-.01em}
.logo-sub{font-size:11px;font-weight:600;letter-spacing:.14em;color:var(--brand)}
.nav-list{display:flex;align-items:center;gap:28px}
.nav-link{
  position:relative;display:block;padding:9px 0;font-size:14px;font-weight:500;color:var(--ink-2);
  transition:color var(--dur) var(--ease);white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:2px;height:2px;width:0;background:var(--brand);
  transition:width var(--dur) var(--ease);
}
.nav-link:hover,.nav-link.is-active{color:var(--brand)}
.nav-link:hover::after,.nav-link.is-active::after{width:100%}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-md);align-items:center;justify-content:center;
  flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease)}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* 移动抽屉 */
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:86%;max-width:380px;background:var(--surface);
  z-index:200;transform:translateX(100%);transition:transform var(--dur) var(--ease);
  padding:28px 24px;display:flex;flex-direction:column;gap:22px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-close{width:44px;height:44px;border-radius:var(--r-md);border:1px solid var(--line);font-size:20px;line-height:1}
.drawer-nav{display:flex;flex-direction:column}
.drawer-nav a{padding:16px 0;font-size:16px;font-weight:600;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}
.drawer-nav a.is-active{color:var(--brand)}
.drawer-note{font-size:13px;color:var(--ink-3)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(16,18,22,.5);z-index:190;opacity:0;visibility:hidden;
  transition:opacity var(--dur) var(--ease),visibility var(--dur) var(--ease);
}
.drawer-mask.is-open{opacity:1;visibility:visible}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-md);font-size:15px;font-weight:600;
  transition:transform var(--dur) var(--ease),background var(--dur) var(--ease),color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
  border:1.5px solid transparent;white-space:nowrap;
}
.btn .arrow{transition:transform var(--dur) var(--ease)}
.btn:hover .arrow{transform:translateX(4px)}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-600);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-ghost{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-ghost:hover{background:var(--ink);color:#fff;transform:translateY(-1px)}
.btn-sm{height:38px;padding:0 16px;font-size:13px;border-radius:var(--r-sm)}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{background:var(--brand);color:#fff;transform:translateY(-1px)}
.btn-outline-light{border-color:rgba(255,255,255,.5);color:#fff}
.btn-outline-light:hover{background:#fff;color:var(--ink);border-color:#fff}
.btn:disabled,.btn[disabled]{opacity:.4;cursor:default;transform:none;box-shadow:none}
.link-more{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);
  border-bottom:1px solid transparent;transition:border-color var(--dur) var(--ease),gap var(--dur) var(--ease);
}
.link-more:hover{border-bottom-color:var(--brand);gap:10px}

/* ---------- 标签 / 徽章 ---------- */
.pill{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand-600);font-size:12px;font-weight:600;letter-spacing:.02em;
}
.badge{
  display:inline-block;padding:4px 12px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand);font-size:12px;font-weight:600;
}
.badge-accent{background:var(--accent-soft);color:var(--accent)}

/* ---------- Hero ---------- */
.hero{padding:72px 0 0}
.hero-inner{display:grid;grid-template-columns:6fr 5fr;gap:56px;align-items:center;min-height:520px}
.hero-copy{max-width:620px}
.hero h1{
  margin-top:20px;font-size:clamp(34px,5.2vw,58px);font-weight:900;line-height:1.1;letter-spacing:-.02em;
}
.hero-sub{margin-top:18px;font-size:17px;color:var(--ink-2);line-height:1.8;max-width:520px}
.hero-actions{margin-top:32px;display:flex;flex-wrap:wrap;gap:14px}
.hero-trust{margin-top:26px;display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.hero-trust li{font-size:12px;color:var(--ink-3);position:relative;padding-right:14px}
.hero-trust li:not(:last-child)::after{content:"";position:absolute;right:0;top:50%;transform:translateY(-50%);width:1px;height:12px;background:var(--line)}
.hero-trust li:last-child{padding-right:0}
.hero-media{
  position:relative;border-radius:var(--r-lg);overflow:hidden;aspect-ratio:16/10;background:linear-gradient(135deg,var(--brand-soft),var(--accent-soft));box-shadow:var(--sh-3);
}
.hero-media img{width:100%;height:100%;object-fit:cover;transition:transform 420ms var(--ease)}
.hero-media::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(255,90,31,.10),rgba(109,74,255,.06));pointer-events:none}
.hero-media:hover img{transform:scale(1.03)}

/* 数据带 */
.statband{margin-top:72px;background:var(--dark);color:#fff}
.statband-inner{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:44px 32px}
.stat-num{font-size:clamp(32px,3.4vw,44px);font-weight:900;line-height:1.05;font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.stat-num em{font-style:normal;color:var(--brand);font-size:.6em;font-weight:800;margin-left:4px}
.stat-label{margin-top:8px;font-size:12px;letter-spacing:.08em;color:rgba(255,255,255,.6)}
.stat{position:relative;padding-left:20px}
.stat::before{content:"";position:absolute;left:0;top:6px;width:2px;height:30px;background:var(--brand)}

/* ---------- 卖点（编号错落） ---------- */
.features-grid{display:grid;grid-template-columns:5fr 7fr;gap:64px;margin-top:56px}
.features-aside{position:sticky;top:110px;align-self:start}
.features-aside .vertical-tag{
  margin-top:28px;writing-mode:vertical-rl;font-size:12px;letter-spacing:.4em;color:var(--ink-3);
  height:120px;border-left:1px solid var(--line);padding-left:14px;
}
.feature-item{display:block;padding:34px 0;border-top:1px solid var(--line);transition:transform var(--dur) var(--ease)}
.feature-item:last-child{border-bottom:1px solid var(--line)}
.feature-item:hover{transform:translateX(4px)}
.feature-head{display:flex;align-items:flex-start;gap:24px}
.feature-num{
  font-size:48px;font-weight:900;line-height:.9;letter-spacing:-.03em;
  color:transparent;-webkit-text-stroke:1px var(--ink-3);transition:color var(--dur) var(--ease),-webkit-text-stroke-color var(--dur) var(--ease);
  flex:0 0 auto;font-variant-numeric:tabular-nums;
}
.feature-item:hover .feature-num{color:var(--brand-soft);-webkit-text-stroke-color:var(--brand)}
.feature-title{font-size:20px;font-weight:700;line-height:1.4}
.feature-desc{margin-top:10px;font-size:15px;color:var(--ink-2);line-height:1.85;max-width:560px}
.feature-arrow{margin-top:14px;font-size:13px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px}

/* ---------- 场景（图文交替） ---------- */
.scene{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding:32px 0}
.scene + .scene{margin-top:40px}
.scene-media{border-radius:14px;overflow:hidden;aspect-ratio:4/3;background:linear-gradient(135deg,var(--surface-2),var(--brand-soft))}
.scene-media img{width:100%;height:100%;object-fit:cover;transition:transform 420ms var(--ease)}
.scene-media:hover img{transform:scale(1.04)}
.scene.rev .scene-media{order:2}
.scene-title{font-size:clamp(22px,2.4vw,28px);font-weight:800;line-height:1.35;margin-top:14px}
.scene-text{margin-top:14px;font-size:15.5px;color:var(--ink-2);line-height:1.9}
.scene-list{margin-top:18px;display:flex;flex-direction:column;gap:10px}
.scene-list li{position:relative;padding-left:20px;font-size:14px;color:var(--ink-2)}
.scene-list li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--brand)}

/* ---------- 资讯列表 ---------- */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
.filter-row{margin-top:26px;display:flex;flex-wrap:wrap;gap:10px}
.filter-chip{
  padding:7px 16px;border-radius:var(--r-pill);border:1px solid var(--line);background:var(--surface);
  font-size:13px;font-weight:500;color:var(--ink-2);transition:all var(--dur) var(--ease);
}
.filter-chip:hover{border-color:var(--brand);color:var(--brand)}
.filter-chip.is-on{background:var(--brand);border-color:var(--brand);color:#fff}
.news-grid{margin-top:34px;display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.post-card{
  grid-column:span 4;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;box-shadow:var(--sh-1);transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--brand)}
.post-card:first-child{grid-column:span 7}
.post-card:nth-child(2){grid-column:span 5}
.post-link{display:flex;flex-direction:column;height:100%}
.post-thumb{aspect-ratio:16/10;overflow:hidden;background:linear-gradient(135deg,var(--surface-2),var(--brand-soft))}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 400ms var(--ease)}
.post-card:hover .post-thumb img{transform:scale(1.04)}
.post-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-title{font-size:18px;font-weight:700;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card:first-child .post-title{font-size:21px}
.post-excerpt{font-size:14px;color:var(--ink-2);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-meta{margin-top:auto;display:flex;align-items:center;gap:12px;font-size:12px;color:var(--ink-3);font-variant-numeric:tabular-nums}
.post-meta i{width:1px;height:12px;background:var(--line);display:inline-block}
.empty-state{
  grid-column:1/-1;height:140px;border:1px dashed var(--line);border-radius:var(--r-md);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;background:var(--surface);
}
.empty-state svg{width:30px;height:30px;stroke:var(--ink-3);fill:none;stroke-width:1.6}
.empty-state p{font-size:14px;color:var(--ink-2)}

/* ---------- 社会认同 ---------- */
.proof-band{background:var(--surface-2);border-radius:var(--r-lg);padding:40px 32px;display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.proof-item .proof-num{font-size:clamp(28px,3vw,38px);font-weight:900;font-variant-numeric:tabular-nums;line-height:1.1}
.proof-item .proof-label{margin-top:6px;font-size:13px;color:var(--ink-2)}
.review-grid{margin-top:40px;display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:28px 24px;
  box-shadow:var(--sh-1);transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.review-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--brand)}
.review-quote{font-size:40px;font-weight:900;line-height:.7;color:var(--brand);font-family:Georgia,serif}
.review-text{margin-top:14px;font-size:15px;color:var(--ink-2);line-height:1.9}
.review-user{margin-top:22px;display:flex;align-items:center;gap:12px}
.review-avatar{
  width:40px;height:40px;border-radius:50%;background:var(--dark);color:#fff;display:flex;align-items:center;
  justify-content:center;font-size:13px;font-weight:700;flex:0 0 auto;
}
.review-name{font-size:14px;font-weight:600}
.review-role{font-size:12px;color:var(--ink-3)}
.brand-row{margin-top:44px;display:flex;flex-wrap:wrap;gap:14px}
.brand-chip{
  padding:10px 18px;border:1px solid var(--line);border-radius:var(--r-sm);background:var(--surface);
  font-size:13px;color:var(--ink-3);filter:grayscale(1);transition:all var(--dur) var(--ease);
}
.brand-chip:hover{filter:grayscale(0);color:var(--brand);border-color:var(--brand)}

/* ---------- FAQ ---------- */
.faq-wrap{display:grid;grid-template-columns:4fr 8fr;gap:56px;align-items:start}
.faq-list{border-top:1px solid var(--line)}
.faq-item{position:relative;border-bottom:1px solid var(--line);padding-left:16px}
.faq-item::before{content:"";position:absolute;left:0;top:0;width:2px;height:0;background:var(--brand);transition:height 280ms var(--ease)}
.faq-item.is-open::before{height:100%}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0;font-size:16px;font-weight:600;text-align:left;line-height:1.6;transition:color var(--dur) var(--ease);
}
.faq-q:hover{color:var(--brand)}
.faq-icon{flex:0 0 auto;width:22px;height:22px;position:relative}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--brand);border-radius:2px;transition:transform 200ms var(--ease),opacity 200ms var(--ease)}
.faq-icon::before{left:0;top:10px;width:22px;height:2px}
.faq-icon::after{left:10px;top:0;width:2px;height:22px}
.faq-item.is-open .faq-icon::after{transform:rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height 280ms var(--ease)}
.faq-item.is-open .faq-a{max-height:360px}
.faq-a p{padding:0 40px 24px 0;font-size:15px;line-height:1.85;color:var(--ink-2)}

/* ---------- CTA ---------- */
.cta-band{position:relative;background:var(--dark);color:#fff;overflow:hidden}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(115deg,rgba(255,90,31,.06) 0 2px,transparent 2px 16px);
}
.cta-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:40px;padding:64px 32px;flex-wrap:wrap}
.cta-title{font-size:clamp(26px,3.2vw,36px);font-weight:800;line-height:1.25;max-width:620px}
.cta-text{margin-top:12px;font-size:15px;color:rgba(255,255,255,.7);max-width:560px;line-height:1.85}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.78);padding:72px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px;padding-bottom:56px}
.footer-logo{display:flex;align-items:center;gap:12px}
.footer-logo .logo-mark{background:rgba(255,255,255,.08)}
.footer-logo .logo-main{color:#fff}
.footer-about{margin-top:18px;font-size:14px;line-height:1.9;color:rgba(255,255,255,.6);max-width:320px}
.footer-title{font-size:13px;font-weight:600;letter-spacing:.1em;color:var(--brand);margin-bottom:18px}
.footer-links{display:grid;grid-template-columns:1fr;gap:12px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.72);transition:color var(--dur) var(--ease),transform var(--dur) var(--ease);display:inline-block}
.footer-links a:hover{color:var(--brand);transform:translateX(2px)}
.footer-form{display:flex;gap:10px;margin-top:16px}
.footer-form input{
  flex:1;height:48px;padding:0 14px;border-radius:var(--r-md);border:1px solid var(--line-dark);
  background:rgba(255,255,255,.06);color:#fff;font-size:14px;
}
.footer-form input::placeholder{color:rgba(255,255,255,.42)}
.footer-form input:focus{outline:none;border-color:var(--brand);box-shadow:var(--focus)}
.footer-form input.is-error{border-color:var(--err)}
.footer-hint{margin-top:10px;font-size:12px;color:rgba(255,255,255,.45)}
.footer-err{margin-top:10px;font-size:12px;color:#FF8A8A;display:none}
.footer-err.is-on{display:block}
.footer-bottom{
  border-top:1px solid var(--line-dark);padding:22px 0 30px;display:flex;align-items:center;
  justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom a:hover{color:var(--brand)}

/* 返回顶部 */
.to-top{
  position:fixed;right:24px;bottom:96px;width:44px;height:44px;border-radius:var(--r-md);background:var(--dark);
  color:#fff;display:flex;align-items:center;justify-content:center;z-index:80;opacity:0;visibility:hidden;
  transform:translateY(10px);transition:all var(--dur) var(--ease);box-shadow:var(--sh-2);
}
.to-top.is-on{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--brand)}

/* 底部固定转化条 */
.fixed-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:110;background:#fff;border-top:1px solid var(--line);
  box-shadow:0 -8px 24px -14px rgba(16,18,22,.28);opacity:0;visibility:hidden;transform:translateY(100%);
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility var(--dur) var(--ease);
}
.fixed-bar.is-on{opacity:1;visibility:visible;transform:translateY(0)}
.fixed-inner{display:flex;align-items:center;justify-content:center;gap:18px;padding:12px 32px;flex-wrap:wrap}
.fixed-text{font-size:14px;color:var(--ink-2)}
.fixed-close{width:32px;height:32px;border-radius:50%;color:var(--ink-3);font-size:18px;line-height:1;display:flex;align-items:center;justify-content:center}
.fixed-close:hover{background:var(--surface-2);color:var(--ink)}

/* 入场动效 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 420ms var(--ease),transform 420ms var(--ease)}
.reveal.is-in{opacity:1;transform:none}
.reveal-right{opacity:0;transform:translateX(16px);transition:opacity 420ms var(--ease),transform 420ms var(--ease)}
.reveal-right.is-in{opacity:1;transform:none}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important}
  .reveal,.reveal-right{transform:none !important}
  .hero-media:hover img,.scene-media:hover img,.post-card:hover .post-thumb img{transform:none !important}
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .container{padding:0 24px}
  :root{--sec:72px}
  .hero-inner{gap:40px}
  .features-grid{gap:40px}
}
@media (max-width:1023px){
  :root{--sec:64px}
  .nav-list,.nav-actions .btn-ghost{display:none}
  .nav-toggle{display:flex}
  .hero-inner{grid-template-columns:1fr;min-height:auto;gap:36px}
  .hero{padding-top:48px}
  .hero-media{aspect-ratio:16/9}
  .statband-inner{grid-template-columns:repeat(2,1fr);gap:30px;padding:36px 24px}
  .features-grid{grid-template-columns:1fr}
  .features-aside{position:static}
  .features-aside .vertical-tag{display:none}
  .scene{grid-template-columns:1fr;gap:28px}
  .scene.rev .scene-media{order:0}
  .news-grid .post-card,.news-grid .post-card:first-child,.news-grid .post-card:nth-child(2){grid-column:span 6}
  .proof-band{grid-template-columns:1fr;gap:20px}
  .review-grid{grid-template-columns:1fr}
  .faq-wrap{grid-template-columns:1fr;gap:32px}
  .cta-inner{padding:48px 24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:767px){
  :root{--sec:56px}
  .container{padding:0 16px}
  .topbar-right .topbar-link{display:none}
  .nav-inner{height:60px}
  .logo-main{font-size:18px}
  .hero h1{font-size:clamp(28px,8.5vw,36px)}
  .hero-actions .btn{width:100%}
  .news-grid{grid-template-columns:1fr}
  .news-grid .post-card,.news-grid .post-card:first-child,.news-grid .post-card:nth-child(2){grid-column:span 1}
  .statband-inner{grid-template-columns:1fr;gap:24px}
  .feature-head{gap:16px}
  .feature-num{font-size:38px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-form{flex-direction:column}
  .footer-form .btn{width:100%}
  .to-top{right:16px;bottom:88px}
  .fixed-inner{padding:10px 16px;gap:12px;justify-content:space-between}
  .fixed-text{font-size:13px}
  .site-footer{padding-bottom:72px}
}

/* roulang page: article */
:root{
  --bg:#F7F5F1;--surface:#FFFFFF;--surface-2:#EFECE6;--dark:#101216;--dark-2:#1B1E24;
  --ink:#101216;--ink-2:#4A5058;--ink-3:#8A9099;--line:#E7E3DC;--line-dark:rgba(255,255,255,.12);
  --brand:#FF5A1F;--brand-600:#E64A12;--brand-soft:#FFEDE5;
  --accent:#6D4AFF;--accent-soft:#EDE8FF;
  --ok:#1F9D6B;--warn:#C98A00;--err:#D93B3B;
  --r-sm:6px;--r-md:10px;--r-lg:16px;--r-pill:999px;
  --sh-1:0 1px 2px rgba(16,18,22,.06);
  --sh-2:0 10px 28px -14px rgba(16,18,22,.22);
  --sh-3:0 24px 60px -28px rgba(16,18,22,.32);
  --focus:0 0 0 3px rgba(255,90,31,.30);
  --ease:cubic-bezier(.2,.7,.3,1);--dur:240ms;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:17px;line-height:1.85;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--ink);text-decoration:none;transition:color var(--dur) var(--ease);}
a:focus-visible,button:focus-visible,input:focus-visible{outline:none;box-shadow:var(--focus);border-radius:var(--r-sm);}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.2;letter-spacing:-.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input{font-family:inherit;font-size:15px;color:var(--ink);}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}
@media (min-width:1440px){.container{max-width:1280px;}}

/* ============ header ============ */
.site-header{position:sticky;top:0;z-index:80;}
.topbar{background:var(--dark);color:#C8CBD1;font-size:12px;}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;min-height:36px;gap:16px;}
.topbar-note{letter-spacing:.02em;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;}
.topbar-right{display:flex;align-items:center;gap:18px;flex:0 0 auto;}
.topbar-link{color:#9BA1AA;font-size:12px;}
.topbar-link:hover{color:#fff;}
.topbar-cta{color:var(--brand);font-size:13px;font-weight:600;}
.topbar-cta:hover{color:#FF8A5C;}
.mainnav{
  background:rgba(247,245,241,.86);backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.mainnav.is-scrolled{background:#fff;border-bottom-color:var(--line);box-shadow:var(--sh-1);}
.nav-inner{display:flex;align-items:center;gap:28px;min-height:68px;}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{
  width:38px;height:38px;border-radius:10px;background:var(--dark);color:#fff;
  display:grid;place-items:center;font-size:12px;font-weight:900;letter-spacing:.06em;
}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-main{font-size:20px;font-weight:900;letter-spacing:-.02em;}
.logo-sub{font-size:11px;font-weight:700;letter-spacing:.14em;color:var(--brand);}
.nav-list{display:flex;align-items:center;gap:26px;margin-left:8px;}
.nav-link{position:relative;font-size:14px;font-weight:500;color:var(--ink-2);padding:6px 0;}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--brand);
  transition:width var(--dur) var(--ease);
}
.nav-link:hover{color:var(--ink);}
.nav-link:hover::after{width:100%;}
.nav-link.is-active{color:var(--brand);font-weight:700;}
.nav-link.is-active::after{width:100%;}
.nav-actions{display:flex;align-items:center;gap:12px;margin-left:auto;}
.nav-toggle{
  display:none;width:44px;height:44px;margin-left:auto;border-radius:var(--r-md);
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ============ buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-md);
  font-size:15px;font-weight:600;letter-spacing:.01em;white-space:nowrap;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.btn-sm{height:40px;padding:0 16px;font-size:14px;}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1);}
.btn-primary:hover{background:var(--brand-600);transform:translateY(-1px);box-shadow:var(--sh-2);color:#fff;}
.btn-primary .btn-arrow{transition:transform var(--dur) var(--ease);}
.btn-primary:hover .btn-arrow{transform:translateX(4px);}
.btn-ghost{background:transparent;border:1.5px solid var(--ink);color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:#fff;}
.btn-light{background:#fff;color:var(--ink);}
.btn-light:hover{background:var(--brand);color:#fff;}
.btn-outline-light{background:transparent;border:1.5px solid rgba(255,255,255,.5);color:#fff;}
.btn-outline-light:hover{border-color:#fff;background:rgba(255,255,255,.1);}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:default;pointer-events:none;}
.text-link{font-size:14px;font-weight:600;color:var(--ink);border-bottom:1px solid var(--line);padding-bottom:2px;}
.text-link:hover{color:var(--brand);border-bottom-color:var(--brand);}
.btn:active{transform:translateY(0);}

/* ============ badge / tag ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand);font-size:12px;font-weight:700;letter-spacing:.04em;
}
.badge-accent{background:var(--accent-soft);color:var(--accent);}
.eyebrow{font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--ink-3);text-transform:uppercase;}

/* ============ progress ============ */
.progress-bar{
  position:fixed;top:0;left:0;height:3px;width:0;background:var(--brand);z-index:120;
  transition:width .12s linear;
}

/* ============ article hero ============ */
.article-hero{
  position:relative;background:var(--dark);color:#fff;overflow:hidden;
  background-image:linear-gradient(110deg,rgba(16,18,22,.94) 0%,rgba(16,18,22,.78) 55%,rgba(16,18,22,.6) 100%),url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
}
.article-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(115deg,rgba(255,90,31,.07) 0 1px,transparent 1px 22px);
}
.article-hero-inner{position:relative;z-index:2;padding:34px 0 60px;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.62);}
.breadcrumb a{color:rgba(255,255,255,.62);}
.breadcrumb a:hover{color:#fff;}
.breadcrumb .sep{color:rgba(255,255,255,.35);}
.breadcrumb .current{max-width:56ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:rgba(255,255,255,.86);}
.article-hero .badge{background:rgba(255,90,31,.16);color:#FF8A5C;}
.article-title{
  margin:18px 0 0;max-width:24ch;font-size:clamp(32px,4.2vw,44px);font-weight:900;line-height:1.25;letter-spacing:-.02em;color:#fff;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:22px;font-size:12px;color:rgba(255,255,255,.7);
  font-variant-numeric:tabular-nums;
}
.article-meta .dot{width:1px;height:12px;background:rgba(255,255,255,.28);}
.hero-divider{margin-top:28px;height:1px;background:var(--line-dark);}

/* ============ layout ============ */
main{display:block;}
.section{padding:96px 0;}
.section-tight{padding:72px 0;}
.article-wrap{padding:64px 0 96px;}
.article-layout{display:grid;grid-template-columns:8fr 4fr;gap:56px;align-items:start;}

/* ============ article body ============ */
.article-body{max-width:44em;font-size:17px;line-height:1.9;color:var(--ink-2);}
.article-body p{margin:0 0 1.25em;}
.article-body h2{
  position:relative;margin:48px 0 18px;padding-left:14px;font-size:28px;font-weight:800;color:var(--ink);line-height:1.3;
}
.article-body h2::before{content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:3px;border-radius:2px;background:var(--brand);}
.article-body h3{margin:32px 0 14px;font-size:21px;font-weight:700;color:var(--ink);}
.article-body h4{margin:24px 0 12px;font-size:18px;font-weight:700;color:var(--ink);}
.article-body strong{color:var(--ink);font-weight:700;}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;border-left:4px solid var(--brand);background:#F7F5F1;border-radius:0 var(--r-md) var(--r-md) 0;
  color:var(--ink-2);font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body ul,.article-body ol{margin:0 0 1.25em;padding-left:0;}
.article-body ul li,.article-body ol li{position:relative;padding-left:22px;margin:0 0 .6em;line-height:1.8;}
.article-body ul li::before{
  content:"";position:absolute;left:4px;top:.72em;width:7px;height:7px;border-radius:50%;background:var(--brand);
}
.article-body ol{counter-reset:ayx;}
.article-body ol li{counter-increment:ayx;}
.article-body ol li::before{
  content:counter(ayx);position:absolute;left:0;top:.1em;width:16px;font-size:14px;font-weight:800;color:var(--brand);
}
.article-body img{border-radius:10px;margin:24px 0 8px;}
.article-body figure{margin:24px 0;}
.article-body figcaption{font-size:12px;color:var(--ink-3);text-align:center;}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;}
.article-body a:hover{color:var(--brand-600);}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;}
.article-body thead th{background:var(--surface-2);font-weight:700;color:var(--ink);text-align:left;}
.article-body th,.article-body td{padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top;}
.article-body code{background:var(--surface-2);padding:2px 6px;border-radius:var(--r-sm);font-size:.92em;}
.article-empty{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:48px 32px;text-align:center;box-shadow:var(--sh-1);
}
.article-empty h2{font-size:22px;font-weight:800;margin-bottom:10px;}
.article-empty p{color:var(--ink-2);margin-bottom:20px;}

/* ============ sidebar ============ */
.article-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px;}
.side-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:22px;box-shadow:var(--sh-1);}
.side-title{font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--ink-3);margin-bottom:14px;}
.side-links{display:flex;flex-direction:column;gap:2px;}
.side-links a{font-size:14px;color:var(--ink-2);padding:8px 10px;border-radius:var(--r-sm);border-left:2px solid transparent;}
.side-links a:hover{background:var(--surface-2);color:var(--brand);border-left-color:var(--brand);}
.mini-list{display:flex;flex-direction:column;gap:14px;}
.mini-item{display:flex;gap:12px;align-items:flex-start;}
.mini-item img{width:64px;height:48px;object-fit:cover;border-radius:var(--r-sm);flex:0 0 auto;}
.mini-item span{font-size:14px;font-weight:600;line-height:1.5;color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.mini-item:hover span{color:var(--brand);}

/* ============ article footer parts ============ */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:44px;padding-top:26px;border-top:1px solid var(--line);}
.tag{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:var(--surface);font-size:13px;font-weight:600;color:var(--ink-2);
}
.tag:hover{background:var(--brand);border-color:var(--brand);color:#fff;}
.share-row{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:22px;font-size:13px;color:var(--ink-3);}
.share-btn{
  display:inline-flex;align-items:center;height:34px;padding:0 14px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:var(--surface);font-size:13px;font-weight:600;color:var(--ink-2);
}
.share-btn:hover{border-color:var(--brand);color:var(--brand);}
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:44px;}
.post-nav a{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:20px 22px;box-shadow:var(--sh-1);
  display:flex;flex-direction:column;gap:8px;
}
.post-nav a:hover{border-color:var(--brand);transform:translateY(-2px);box-shadow:var(--sh-2);}
.post-nav .pn-label{font-size:12px;font-weight:700;letter-spacing:.08em;color:var(--ink-3);}
.post-nav .pn-title{font-size:16px;font-weight:700;color:var(--ink);line-height:1.45;}
.back-cat{margin-top:26px;}

/* ============ cards / related ============ */
.related-block{margin-top:64px;}
.block-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px;}
.block-head h2{font-size:clamp(24px,2.6vw,32px);font-weight:800;}
.block-head p{font-size:15px;color:var(--ink-2);margin-top:8px;}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;box-shadow:var(--sh-1);transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.card:hover{border-color:var(--brand);transform:translateY(-2px);box-shadow:var(--sh-2);}
.card-cover{aspect-ratio:16/10;overflow:hidden;background:var(--surface-2);}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform 400ms var(--ease);}
.card:hover .card-cover img{transform:scale(1.04);}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-title{
  font-size:18px;font-weight:700;line-height:1.45;color:var(--ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-desc{
  font-size:14px;line-height:1.75;color:var(--ink-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-meta{margin-top:auto;font-size:12px;color:var(--ink-3);font-variant-numeric:tabular-nums;display:flex;align-items:center;gap:10px;}

/* ============ CTA band ============ */
.cta-band{position:relative;background:var(--dark);color:#fff;overflow:hidden;}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(115deg,rgba(255,90,31,.06) 0 1px,transparent 1px 26px);pointer-events:none;
}
.cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:32px;padding:56px 0;}
.cta-inner h2{font-size:clamp(24px,3vw,34px);font-weight:800;color:#fff;}
.cta-inner p{margin-top:10px;font-size:15px;color:rgba(255,255,255,.72);max-width:52ch;}
.cta-actions{display:flex;gap:14px;flex:0 0 auto;}

/* ============ footer ============ */
.site-footer{background:var(--dark);color:#C8CBD1;padding:72px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;gap:44px;padding-bottom:48px;}
.footer-logo{display:inline-flex;align-items:center;gap:10px;margin-bottom:18px;}
.footer-logo .logo-mark{background:rgba(255,255,255,.08);}
.footer-logo .logo-main{color:#fff;}
.footer-about{font-size:14px;line-height:1.85;color:#9BA1AA;max-width:38ch;}
.footer-title{font-size:13px;font-weight:700;letter-spacing:.1em;color:#fff;margin-bottom:18px;}
.footer-links{display:grid;grid-template-columns:1fr;gap:12px;}
.footer-links a{font-size:14px;color:#9BA1AA;transition:color var(--dur) var(--ease),transform var(--dur) var(--ease);}
.footer-links a:hover{color:var(--brand);transform:translateX(2px);}
.footer-form{display:flex;gap:10px;margin-top:14px;}
.footer-form input{
  flex:1;min-width:0;height:40px;padding:0 12px;border-radius:var(--r-md);
  border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.05);color:#fff;
}
.footer-form input::placeholder{color:#7C838C;}
.footer-form input:focus{border-color:var(--brand);box-shadow:var(--focus);outline:none;}
.footer-form input.is-error{border-color:var(--err);}
.footer-hint{font-size:12px;color:#7C838C;margin-top:10px;}
.footer-err{display:none;font-size:12px;color:#FF8A8A;margin-top:8px;}
.footer-err.is-show{display:block;}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  padding:20px 0 72px;border-top:1px solid var(--line-dark);font-size:13px;color:#8A9099;
}
@media (min-width:1024px){.footer-bottom{padding-bottom:24px;}}

/* ============ drawer ============ */
.drawer-mask{position:fixed;inset:0;background:rgba(16,18,22,.5);opacity:0;visibility:hidden;transition:opacity var(--dur) var(--ease),visibility var(--dur);z-index:90;}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:86%;max-width:360px;background:#fff;z-index:100;
  transform:translateX(100%);transition:transform var(--dur) var(--ease);
  display:flex;flex-direction:column;padding:22px;gap:8px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;}
.drawer-close{width:44px;height:44px;border-radius:var(--r-md);font-size:24px;line-height:1;color:var(--ink-2);}
.drawer-close:hover{background:var(--surface-2);}
.drawer-nav{display:flex;flex-direction:column;gap:4px;}
.drawer-nav a{font-size:16px;font-weight:600;padding:13px 12px;border-radius:var(--r-md);color:var(--ink-2);}
.drawer-nav a:hover,.drawer-nav a.is-active{background:var(--brand-soft);color:var(--brand);}
.drawer-cta{display:flex;flex-direction:column;gap:12px;margin-top:18px;}
.drawer-cta .btn{width:100%;}
.drawer-domain{margin-top:auto;padding-top:24px;font-size:12px;color:var(--ink-3);}

/* ============ back to top & convert bar ============ */
.backtop{
  position:fixed;right:20px;bottom:88px;width:44px;height:44px;border-radius:var(--r-md);
  background:var(--dark);color:#fff;display:grid;place-items:center;font-size:16px;
  opacity:0;visibility:hidden;transform:translateY(8px);transition:all var(--dur) var(--ease);z-index:85;box-shadow:var(--sh-2);
}
.backtop.is-show{opacity:1;visibility:visible;transform:translateY(0);}
.backtop:hover{background:var(--brand);}
.convert-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:88;background:var(--surface);border-top:1px solid var(--line);
  box-shadow:0 -10px 28px -18px rgba(16,18,22,.35);
  transform:translateY(100%);transition:transform var(--dur) var(--ease);
}
.convert-bar.is-show{transform:translateY(0);}
.convert-inner{display:flex;align-items:center;justify-content:center;gap:20px;min-height:60px;padding-top:8px;padding-bottom:8px;}
.convert-text{font-size:14px;font-weight:600;color:var(--ink);}
.convert-close{width:32px;height:32px;border-radius:var(--r-sm);color:var(--ink-3);font-size:18px;line-height:1;}
.convert-close:hover{background:var(--surface-2);color:var(--ink);}

/* ============ reveal ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 420ms var(--ease),transform 420ms var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ============ responsive ============ */
@media (max-width:1199px){
  .article-side{position:static;top:auto;}
  .article-layout{grid-template-columns:1fr;gap:40px;}
  .side-inline{display:block;margin-top:48px;}
}
@media (max-width:1023px){
  .nav-list,.nav-actions{display:none;}
  .nav-toggle{display:flex;}
  .container{padding:0 24px;}
  .section{padding:72px 0;}
  .article-wrap{padding:48px 0 72px;}
  .article-hero-inner{padding:26px 0 44px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .card-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:767px){
  .topbar-link{display:none;}
  .article-hero .article-title{max-width:none;}
  .card-grid{grid-template-columns:1fr;}
  .post-nav{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .cta-actions{flex-direction:column;width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-form{flex-direction:column;}
  .footer-form .btn{width:100%;}
  .convert-bar.is-show{transform:translateY(0);}
  .convert-bar{transform:translateY(0);}
  .convert-bar.is-hidden{transform:translateY(100%);}
}
@media (max-width:639px){
  .container{padding:0 16px;}
  .section{padding:56px 0;}
  .article-title{font-size:clamp(30px,8vw,34px);}
  .article-body{font-size:16px;line-height:1.85;}
  .article-body h2{font-size:23px;margin-top:38px;}
  .article-body h3{font-size:19px;}
  .hero-divider{margin-top:22px;}
  .convert-inner{gap:12px;justify-content:space-between;}
  .footer-bottom{padding-bottom:88px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-property:opacity!important;}
  .reveal{transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category1 */
:root{
  --bg:#F7F5F1;
  --surface:#FFFFFF;
  --surface-2:#EFECE6;
  --dark:#101216;
  --dark-2:#1B1E24;
  --ink:#101216;
  --ink-2:#4A5058;
  --ink-3:#8A9099;
  --line:#E7E3DC;
  --line-dark:rgba(255,255,255,.12);
  --brand:#FF5A1F;
  --brand-600:#E64A12;
  --brand-soft:#FFEDE5;
  --accent:#6D4AFF;
  --accent-soft:#EDE8FF;
  --ok:#1F9D6B;
  --warn:#C98A00;
  --err:#D93B3B;
  --r-sm:6px;
  --r-md:10px;
  --r-lg:16px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,18,22,.06);
  --sh-2:0 10px 28px -14px rgba(16,18,22,.22);
  --sh-3:0 24px 60px -28px rgba(16,18,22,.32);
  --focus:0 0 0 3px rgba(255,90,31,.30);
  --ease:cubic-bezier(.2,.7,.3,1);
  --dur:240ms;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
input{font:inherit}
:focus-visible{outline:none;box-shadow:var(--focus)}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:96px 0}
.section-tight{padding:72px 0}
.eyebrow{font-size:13px;font-weight:500;letter-spacing:.08em;color:var(--ink-3);text-transform:uppercase}
.sec-head{max-width:680px;margin-bottom:48px}
.sec-head h2{font-size:clamp(28px,3.4vw,40px);font-weight:800;line-height:1.2;margin:12px 0 16px;letter-spacing:-.01em}
.sec-head p{color:var(--ink-2);font-size:16px;line-height:1.8}
.reveal{opacity:0;transform:translateY(12px);transition:opacity 420ms var(--ease),transform 420ms var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 顶部信息条 ---------- */
.topbar{height:36px;background:var(--dark);color:rgba(255,255,255,.78);font-size:12px;display:flex;align-items:center}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:36px}
.topbar-note{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;letter-spacing:.02em}
.topbar-right{display:flex;align-items:center;gap:20px;flex:none}
.topbar-link{color:rgba(255,255,255,.62);transition:color var(--dur) var(--ease)}
.topbar-link:hover{color:#fff}
.topbar-cta{color:var(--brand);font-weight:600;letter-spacing:.02em;transition:color var(--dur) var(--ease)}
.topbar-cta:hover{color:#FF8153}

/* ---------- 主导航 ---------- */
.site-header{position:sticky;top:0;z-index:50}
.mainnav{height:68px;background:rgba(247,245,241,.88);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid transparent;transition:background var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease)}
.mainnav.is-scrolled{background:#fff;border-bottom-color:var(--line);box-shadow:var(--sh-1)}
.nav-inner{display:flex;align-items:center;gap:24px;height:68px}
.logo{display:flex;align-items:center;gap:11px;flex:none}
.logo-mark{display:inline-flex;align-items:center;justify-content:center;width:42px;height:34px;border-radius:9px;background:var(--brand);color:#fff;font-weight:900;font-size:13px;letter-spacing:.08em}
.logo-text{display:flex;flex-direction:column;line-height:1.1}
.logo-main{font-size:20px;font-weight:900;letter-spacing:-.01em}
.logo-sub{font-size:11px;font-weight:600;letter-spacing:.14em;color:var(--brand)}
.nav-list{display:flex;align-items:center;gap:2px;margin-left:8px}
.nav-link{position:relative;display:inline-flex;align-items:center;height:68px;padding:0 14px;font-size:14px;font-weight:500;color:var(--ink-2);transition:color var(--dur) var(--ease)}
.nav-link::after{content:"";position:absolute;left:14px;right:14px;bottom:18px;height:2px;background:var(--brand);border-radius:2px;transform:scaleX(0);transform-origin:left;transition:transform var(--dur) var(--ease)}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:auto;flex:none}
.nav-toggle{display:none;width:44px;height:44px;flex-direction:column;align-items:center;justify-content:center;gap:5px;border-radius:var(--r-sm)}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease)}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:var(--r-md);font-size:15px;font-weight:600;letter-spacing:.01em;transition:transform var(--dur) var(--ease),background var(--dur) var(--ease),color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease)}
.btn i{transition:transform var(--dur) var(--ease)}
.btn:hover i{transform:translateX(4px)}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--brand-600);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-ghost{border:1.5px solid var(--ink);color:var(--ink);background:transparent}
.btn-ghost:hover{background:var(--ink);color:#fff}
.btn-light{background:#fff;color:var(--ink);border:1px solid var(--line)}
.btn-light:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-lg{height:52px;padding:0 28px;font-size:16px}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:default;pointer-events:none}
.link-arrow{display:inline-flex;align-items:center;gap:7px;font-size:15px;font-weight:600;color:var(--brand);border-bottom:1px solid transparent;transition:gap var(--dur) var(--ease),border-color var(--dur) var(--ease)}
.link-arrow:hover{gap:12px;border-bottom-color:var(--brand)}
.tag{display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:var(--r-pill);background:var(--brand-soft);color:var(--brand-600);font-size:12px;font-weight:600;letter-spacing:.02em}
.tag-accent{background:var(--accent-soft);color:var(--accent)}
.tag-plain{background:var(--surface-2);color:var(--ink-2)}

/* ---------- 分类页头 ---------- */
.page-head{background:var(--surface-2);border-bottom:1px solid var(--line);padding:64px 0 56px;position:relative;overflow:hidden}
.page-head::after{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;background:var(--brand-soft);opacity:.55;filter:blur(10px);pointer-events:none}
.page-head-inner{position:relative;z-index:1;max-width:840px}
.page-head h1{font-size:clamp(34px,4.6vw,48px);font-weight:900;line-height:1.16;letter-spacing:-.02em;margin:20px 0 18px}
.page-head p.lead{font-size:17px;color:var(--ink-2);max-width:660px}
.breadcrumb{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--ink-3);margin-bottom:4px}
.breadcrumb a:hover{color:var(--brand)}
.page-banner{margin-top:40px;border-radius:var(--r-lg);overflow:hidden;aspect-ratio:21/9;background:var(--dark-2);position:relative}
.page-banner img{width:100%;height:100%;object-fit:cover}
.page-banner .banner-cap{position:absolute;left:0;bottom:0;right:0;padding:26px 30px;background:linear-gradient(to top,rgba(16,18,22,.78),rgba(16,18,22,0));color:#fff;font-size:14px;letter-spacing:.02em}

/* ---------- 流程布局 ---------- */
.flow-wrap{display:grid;grid-template-columns:260px 1fr;gap:64px;align-items:start}
.flow-index{position:sticky;top:104px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:22px 20px;box-shadow:var(--sh-1)}
.flow-index h2{font-size:13px;font-weight:600;letter-spacing:.1em;color:var(--ink-3);margin-bottom:14px}
.index-item{display:flex;align-items:center;gap:12px;padding:10px 10px;border-radius:var(--r-sm);font-size:14px;font-weight:500;color:var(--ink-2);transition:background var(--dur) var(--ease),color var(--dur) var(--ease)}
.index-item span.num{font-variant-numeric:tabular-nums;font-weight:800;font-size:13px;color:var(--ink-3);transition:color var(--dur) var(--ease)}
.index-item:hover{background:var(--surface-2);color:var(--ink)}
.index-item.is-active{background:var(--brand-soft);color:var(--brand-600)}
.index-item.is-active span.num{color:var(--brand)}
.flow-body{border-top:1px solid var(--line)}
.step{padding:44px 0;border-bottom:1px solid var(--line);scroll-margin-top:100px}
.step-top{display:flex;align-items:flex-start;gap:22px}
.step-num{font-size:44px;font-weight:900;line-height:1;color:transparent;-webkit-text-stroke:1px var(--ink-3);font-variant-numeric:tabular-nums;flex:none;transition:color var(--dur) var(--ease),-webkit-text-stroke-color var(--dur) var(--ease)}
.step:hover .step-num{color:var(--brand-soft);-webkit-text-stroke-color:var(--brand)}
.step h3{font-size:22px;font-weight:700;line-height:1.35;margin:10px 0 12px}
.step p{color:var(--ink-2);font-size:16px;max-width:760px}
.point-list{margin-top:20px;display:grid;gap:12px}
.point-list li{position:relative;padding-left:22px;font-size:15px;color:var(--ink-2);line-height:1.8}
.point-list li::before{content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:50%;background:var(--brand)}
.step-figure{margin-top:26px;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);background:var(--surface)}
.step-figure img{width:100%;height:260px;object-fit:cover;transition:transform 400ms var(--ease)}
.step-figure:hover img{transform:scale(1.04)}
.note-bar{margin-top:26px;background:var(--surface);border-left:3px solid var(--brand);border-radius:0 var(--r-md) var(--r-md) 0;padding:18px 22px;font-size:15px;color:var(--ink-2)}

/* ---------- 深色自检区 ---------- */
.check-band{background:var(--dark);color:rgba(255,255,255,.86);position:relative;overflow:hidden}
.check-band::before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(115deg,rgba(255,90,31,.06) 0 2px,transparent 2px 14px);pointer-events:none}
.check-band .container{position:relative;z-index:1}
.check-band h2{font-size:clamp(26px,3.2vw,36px);font-weight:800;color:#fff;line-height:1.22;margin:14px 0 14px}
.check-band .eyebrow{color:rgba(255,255,255,.5)}
.check-band p.intro{color:rgba(255,255,255,.68);max-width:640px;font-size:16px}
.check-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:44px}
.check-card{background:var(--dark-2);border:1px solid var(--line-dark);border-radius:var(--r-lg);padding:26px 24px;transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease)}
.check-card:hover{transform:translateY(-2px);border-color:rgba(255,90,31,.5)}
.check-card i{color:var(--brand);font-size:20px}
.check-card h3{font-size:17px;font-weight:700;color:#fff;margin:14px 0 8px}
.check-card p{font-size:14px;color:rgba(255,255,255,.62);line-height:1.75}
.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:52px;padding-top:36px;border-top:1px solid var(--line-dark)}
.stat-num{font-size:clamp(34px,4vw,48px);font-weight:900;color:#fff;font-variant-numeric:tabular-nums;line-height:1.1}
.stat-label{font-size:12px;letter-spacing:.08em;color:rgba(255,255,255,.5);margin-top:6px}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line);position:relative;transition:padding var(--dur) var(--ease)}
.faq-item::before{content:"";position:absolute;left:-18px;top:20px;bottom:20px;width:2px;background:var(--brand);border-radius:2px;opacity:0;transition:opacity var(--dur) var(--ease)}
.faq-item.is-open::before{opacity:1}
.faq-q{display:flex;align-items:center;justify-content:space-between;gap:20px;width:100%;padding:22px 0;text-align:left;font-size:16px;font-weight:600;color:var(--ink)}
.faq-q:hover{color:var(--brand-600)}
.faq-q i{flex:none;color:var(--ink-3);font-size:14px;transition:transform 200ms var(--ease),color 200ms var(--ease)}
.faq-item.is-open .faq-q i{transform:rotate(45deg);color:var(--brand)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 280ms var(--ease)}
.faq-a p{padding:0 40px 24px 0;font-size:15px;color:var(--ink-2);line-height:1.85}

/* ---------- CTA ---------- */
.cta-band{background:var(--dark);color:#fff;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(115deg,rgba(255,90,31,.06) 0 2px,transparent 2px 14px)}
.cta-inner{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap}
.cta-inner h2{font-size:clamp(26px,3.2vw,36px);font-weight:800;line-height:1.22;margin-bottom:12px}
.cta-inner p{color:rgba(255,255,255,.68);max-width:560px;font-size:16px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- 交叉链接 ---------- */
.cross-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:44px}
.cross-card{display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:26px 24px;box-shadow:var(--sh-1);transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease)}
.cross-card:hover{transform:translateY(-2px);border-color:var(--brand);box-shadow:var(--sh-2)}
.cross-card h3{font-size:18px;font-weight:700;margin:12px 0 8px}
.cross-card p{font-size:14px;color:var(--ink-2);line-height:1.75;margin-bottom:16px}
.cross-card .link-arrow{font-size:14px}
.cross-card.is-current{border-color:var(--brand);background:var(--brand-soft)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:72px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:48px;padding-bottom:56px}
.footer-logo{display:flex;align-items:center;gap:11px;margin-bottom:18px}
.footer-about{font-size:14px;line-height:1.8;color:rgba(255,255,255,.58);max-width:340px}
.footer-title{font-size:13px;font-weight:600;letter-spacing:.1em;color:rgba(255,255,255,.45);margin-bottom:18px}
.footer-links{display:grid;gap:12px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.72);transition:color var(--dur) var(--ease),transform var(--dur) var(--ease);display:inline-block}
.footer-links a:hover{color:var(--brand);transform:translateX(2px)}
.footer-form{display:flex;gap:10px;margin-top:14px}
.footer-form input{flex:1;min-width:0;height:48px;padding:0 14px;border-radius:var(--r-md);border:1px solid var(--line-dark);background:var(--dark-2);color:#fff;font-size:14px;transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease)}
.footer-form input::placeholder{color:var(--ink-3)}
.footer-form input:focus{border-color:var(--brand);box-shadow:var(--focus);outline:none}
.footer-form input.is-error{border-color:var(--err)}
.footer-hint{font-size:12px;color:rgba(255,255,255,.45);margin-top:10px}
.footer-err{display:none;font-size:12px;color:#FF8A6B;margin-top:6px}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:24px 0 32px;border-top:1px solid var(--line-dark);font-size:13px;color:rgba(255,255,255,.45)}

/* ---------- 底部转化条 / 返回顶部 ---------- */
.convert-bar{position:fixed;left:0;right:0;bottom:0;z-index:60;background:#fff;border-top:1px solid var(--line);box-shadow:0 -8px 28px -20px rgba(16,18,22,.5);transform:translateY(110%);transition:transform 240ms var(--ease)}
.convert-bar.is-visible{transform:none}
.convert-bar.is-hidden{display:none}
.convert-inner{display:flex;align-items:center;justify-content:center;gap:20px;height:64px}
.convert-inner p{font-size:14px;color:var(--ink-2)}
.convert-close{width:32px;height:32px;border-radius:var(--r-sm);color:var(--ink-3);display:inline-flex;align-items:center;justify-content:center;transition:background var(--dur) var(--ease),color var(--dur) var(--ease)}
.convert-close:hover{background:var(--surface-2);color:var(--ink)}
.back-top{position:fixed;right:24px;bottom:96px;z-index:55;width:44px;height:44px;border-radius:var(--r-md);background:var(--dark);color:#fff;display:inline-flex;align-items:center;justify-content:center;box-shadow:var(--sh-2);opacity:0;transform:translateY(10px);pointer-events:none;transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),background var(--dur) var(--ease)}
.back-top.is-visible{opacity:1;transform:none;pointer-events:auto}
.back-top:hover{background:var(--brand)}

/* ---------- 移动抽屉 ---------- */
.drawer-overlay{position:fixed;inset:0;background:rgba(16,18,22,.5);z-index:70;opacity:0;pointer-events:none;transition:opacity var(--dur) var(--ease)}
.drawer-overlay.is-open{opacity:1;pointer-events:auto}
.mobile-drawer{position:fixed;top:0;right:0;bottom:0;width:86%;max-width:380px;background:#fff;z-index:80;transform:translateX(100%);transition:transform 300ms var(--ease);display:flex;flex-direction:column;padding:24px 22px;overflow-y:auto}
.mobile-drawer.is-open{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px}
.drawer-close{width:44px;height:44px;border-radius:var(--r-sm);color:var(--ink-2);display:inline-flex;align-items:center;justify-content:center;font-size:18px}
.drawer-close:hover{background:var(--surface-2)}
.drawer-links{display:grid;gap:4px;margin-bottom:26px}
.drawer-links a{padding:14px 12px;border-radius:var(--r-sm);font-size:16px;font-weight:500;color:var(--ink-2);transition:background var(--dur) var(--ease),color var(--dur) var(--ease)}
.drawer-links a:hover{background:var(--surface-2);color:var(--ink)}
.drawer-links a.is-active{background:var(--brand-soft);color:var(--brand-600);font-weight:600}
.drawer-actions{display:grid;gap:12px;margin-top:auto}
.drawer-domain{text-align:center;font-size:12px;color:var(--ink-3);margin-top:18px}

/* ---------- 响应式 ---------- */
@media (max-width:1439px){
  .container{max-width:1200px}
}
@media (min-width:1440px){
  .container{max-width:1280px}
}
@media (max-width:1023px){
  .container{padding:0 24px}
  .section{padding:72px 0}
  .nav-list{display:none}
  .nav-actions .btn-ghost{display:none}
  .nav-toggle{display:flex}
  .flow-wrap{grid-template-columns:1fr;gap:0}
  .flow-index{display:none}
  .check-grid{grid-template-columns:1fr;gap:16px}
  .stat-row{grid-template-columns:repeat(3,1fr);gap:16px}
  .cross-grid{grid-template-columns:1fr;gap:16px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .step-figure img{height:220px}
}
@media (max-width:767px){
  .topbar-link{display:none}
  .page-head{padding:44px 0 40px}
  .page-banner{aspect-ratio:16/9;margin-top:28px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .btn{width:100%}
  .btn.btn-sm{width:auto}
  .cta-actions{width:100%}
  .convert-inner{justify-content:space-between;padding:0 16px;height:60px}
  .convert-inner p{font-size:14px}
  .stat-row{grid-template-columns:1fr 1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:639px){
  .container{padding:0 16px}
  .section{padding:56px 0}
  .section-tight{padding:48px 0}
  .step{padding:32px 0}
  .step-num{font-size:34px}
  .step-top{gap:14px}
  .site-footer{padding-bottom:72px}
  .convert-bar{transform:translateY(0)}
  .back-top{bottom:80px;right:16px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{transform:none;transition:opacity 240ms linear}
  .btn:hover,.cross-card:hover,.check-card:hover{transform:none}
  .step-figure:hover img{transform:none}
}

/* roulang page: category2 */
:root{
  --bg:#F7F5F1;--surface:#FFFFFF;--surface-2:#EFECE6;--dark:#101216;--dark-2:#1B1E24;
  --ink:#101216;--ink-2:#4A5058;--ink-3:#8A9099;--line:#E7E3DC;--line-dark:rgba(255,255,255,.12);
  --brand:#FF5A1F;--brand-600:#E64A12;--brand-soft:#FFEDE5;
  --accent:#6D4AFF;--accent-soft:#EDE8FF;
  --ok:#1F9D6B;--warn:#C98A00;--err:#D93B3B;
  --r-sm:6px;--r-md:10px;--r-lg:16px;--r-pill:999px;
  --sh-1:0 1px 2px rgba(16,18,22,.06);--sh-2:0 10px 28px -14px rgba(16,18,22,.22);--sh-3:0 24px 60px -28px rgba(16,18,22,.32);
  --focus:0 0 0 3px rgba(255,90,31,.30);
  --ease:cubic-bezier(.2,.7,.3,1);--dur:240ms;
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--font);font-size:17px;line-height:1.85;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}
body.nav-open{overflow:hidden}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input{font-family:inherit;font-size:inherit}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.25;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
::selection{background:var(--brand);color:#fff}
:focus-visible{outline:none;box-shadow:var(--focus);border-radius:var(--r-sm)}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding-top:96px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--ink-3);text-transform:none}
.section-head{max-width:760px}
.section-head h2{font-size:clamp(28px,3.4vw,40px);font-weight:800;margin-top:12px}
.section-head p{margin-top:16px;color:var(--ink-2);font-size:16px;line-height:1.8}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:var(--r-md);font-size:15px;font-weight:600;border:1.5px solid transparent;background:none;cursor:pointer;transition:all var(--dur) var(--ease);white-space:nowrap}
.btn .arw{transition:transform var(--dur) var(--ease)}
.btn:hover .arw{transform:translateX(4px)}
.btn-primary{background:var(--brand);color:#fff;border-color:var(--brand)}
.btn-primary:hover{background:var(--brand-600);border-color:var(--brand-600);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-ghost{border-color:var(--ink);color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff;transform:translateY(-1px)}
.btn-light{background:#fff;color:var(--dark);border-color:#fff}
.btn-light:hover{background:var(--brand);border-color:var(--brand);color:#fff;transform:translateY(-1px)}
.btn-outline-light{border-color:rgba(255,255,255,.4);color:#fff}
.btn-outline-light:hover{background:#fff;color:var(--dark);border-color:#fff}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn:disabled{opacity:.4;cursor:default}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--brand);border-bottom:1px solid transparent;padding-bottom:2px;transition:all var(--dur) var(--ease)}
.link-arrow:hover{border-bottom-color:var(--brand)}
.link-arrow:hover .arw{transform:translateX(4px)}
.link-arrow .arw{transition:transform var(--dur) var(--ease)}

/* ---------- 顶部信息条 ---------- */
.site-header{position:relative;z-index:50}
.topbar{height:36px;background:var(--dark);color:rgba(255,255,255,.72);font-size:12px;display:flex;align-items:center}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px}
.topbar-note{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-right{display:flex;align-items:center;gap:18px;flex-shrink:0}
.topbar-link{color:rgba(255,255,255,.6);transition:color var(--dur) var(--ease)}
.topbar-link:hover{color:#fff}
.topbar-cta{color:var(--brand);font-weight:600;transition:color var(--dur) var(--ease)}
.topbar-cta:hover{color:#FF8552}

/* ---------- 主导航 ---------- */
.mainnav{position:sticky;top:0;z-index:50;height:68px;display:flex;align-items:center;background:rgba(247,245,241,.88);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid transparent;transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease)}
.mainnav.is-scrolled{background:#fff;border-bottom-color:var(--line);box-shadow:var(--sh-1)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px}
.logo{display:inline-flex;align-items:center;gap:12px;flex-shrink:0}
.logo-mark{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:var(--r-md);background:var(--dark);color:#fff;font-size:12px;font-weight:900;letter-spacing:.06em}
.logo-text{display:flex;flex-direction:column;line-height:1.1}
.logo-main{font-size:20px;font-weight:900;letter-spacing:-.01em}
.logo-sub{font-size:11px;font-weight:600;letter-spacing:.14em;color:var(--brand)}
.nav-list{display:flex;align-items:center;gap:30px}
.nav-link{position:relative;display:inline-block;padding:6px 0;font-size:14px;font-weight:500;color:var(--ink-2);transition:color var(--dur) var(--ease)}
.nav-link::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--brand);transition:width var(--dur) var(--ease)}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{width:100%}
.nav-actions{display:flex;align-items:center;gap:10px}
.nav-toggle{display:none;width:44px;height:44px;border:0;background:none;cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:5px;z-index:70;position:relative}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease)}
body.nav-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
body.nav-open .nav-toggle span:nth-child(2){opacity:0}
body.nav-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav-scrim{position:fixed;inset:0;background:rgba(16,18,22,.5);opacity:0;visibility:hidden;transition:opacity var(--dur) var(--ease),visibility var(--dur) var(--ease);z-index:55}
body.nav-open .nav-scrim{opacity:1;visibility:visible}

/* ---------- 分类页头（深色） ---------- */
.cat-hero{background:var(--dark);color:#fff;position:relative;overflow:hidden;padding-top:72px}
.cat-hero::before{content:"";position:absolute;inset:0;background:radial-gradient(680px 340px at 88% 8%,rgba(255,90,31,.18),transparent 62%),radial-gradient(520px 300px at 4% 92%,rgba(109,74,255,.14),transparent 60%);pointer-events:none}
.cat-hero .container{position:relative;z-index:1}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.5);flex-wrap:wrap}
.crumb a:hover{color:var(--brand)}
.cat-hero h1{margin-top:22px;font-size:clamp(34px,4.6vw,48px);font-weight:900;line-height:1.16;max-width:820px}
.cat-hero .lede{margin-top:20px;font-size:16px;line-height:1.85;color:rgba(255,255,255,.7);max-width:680px}
.chip{display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;border-radius:var(--r-pill);background:rgba(255,90,31,.16);border:1px solid rgba(255,90,31,.35);color:#FF8552;font-size:12px;font-weight:600;letter-spacing:.06em}
.hero-stats{display:flex;flex-wrap:wrap;gap:48px;margin-top:44px;padding-bottom:40px}
.hero-stats .num{font-size:40px;font-weight:900;font-variant-numeric:tabular-nums;line-height:1}
.hero-stats .lab{margin-top:8px;font-size:12px;letter-spacing:.08em;color:rgba(255,255,255,.5)}
.cat-banner{margin-top:8px;border-radius:var(--r-lg) var(--r-lg) 0 0;overflow:hidden;aspect-ratio:21/9;position:relative;background:var(--dark-2)}
.cat-banner img{width:100%;height:100%;object-fit:cover;opacity:.92}

/* ---------- 图文交替 ---------- */
.flow{padding-top:96px}
.flow-item{display:grid;grid-template-columns:6fr 6fr;gap:64px;align-items:center;padding:0 0 80px}
.flow-item + .flow-item{border-top:1px solid var(--line);padding-top:80px}
.flow-item:last-child{padding-bottom:0}
.flow-item.is-rev .flow-media{order:2}
.flow-media{border-radius:var(--r-lg);overflow:hidden;aspect-ratio:16/11;background:var(--surface-2);box-shadow:var(--sh-1)}
.flow-media img{width:100%;height:100%;object-fit:cover;transition:transform 400ms var(--ease)}
.flow-item:hover .flow-media img{transform:scale(1.03)}
.flow-tag{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);background:var(--brand-soft);color:var(--brand);font-size:12px;font-weight:700;letter-spacing:.06em}
.flow-body h2{margin-top:16px;font-size:clamp(22px,2.4vw,28px);font-weight:800}
.flow-body p{margin-top:14px;color:var(--ink-2);font-size:16px}
.point-list{margin-top:20px;display:grid;gap:10px}
.point-list li{position:relative;padding-left:22px;font-size:15px;color:var(--ink-2);line-height:1.75}
.point-list li::before{content:"";position:absolute;left:0;top:10px;width:7px;height:7px;border-radius:50%;background:var(--brand)}
.flow-body .link-arrow{margin-top:22px}

/* ---------- 提示条 ---------- */
.notice{margin:0 0 80px;background:var(--surface-2);border-left:3px solid var(--brand);border-radius:var(--r-sm);padding:26px 32px;display:flex;gap:20px;align-items:flex-start}
.notice-ico{flex-shrink:0;width:38px;height:38px;border-radius:var(--r-md);background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:16px}
.notice h3{font-size:17px;font-weight:700}
.notice p{margin-top:8px;font-size:15px;color:var(--ink-2);line-height:1.8}

/* ---------- 对照表 ---------- */
.compare-wrap{margin-top:40px}
.compare{width:100%;border-collapse:collapse;font-size:15px}
.compare caption{text-align:left;font-size:13px;letter-spacing:.08em;color:var(--ink-3);padding-bottom:14px}
.compare th{text-align:left;font-weight:700;font-size:13px;letter-spacing:.06em;color:var(--ink-2);background:var(--surface-2);padding:14px 18px}
.compare th:first-child{border-radius:var(--r-sm) 0 0 var(--r-sm)}
.compare th:last-child{border-radius:0 var(--r-sm) var(--r-sm) 0}
.compare td{padding:18px;border-bottom:1px solid var(--line);vertical-align:top;color:var(--ink-2);line-height:1.75}
.compare td:first-child{width:30%;color:var(--ink);font-weight:600}
.compare tbody tr:hover td{background:rgba(255,90,31,.04)}

/* ---------- FAQ ---------- */
.faq{margin-top:40px;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line);position:relative}
.faq-item::before{content:"";position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--brand);transform:scaleY(0);transform-origin:top;transition:transform var(--dur) var(--ease)}
.faq-item.is-open::before{transform:scaleY(1)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:22px 20px;background:none;border:0;text-align:left;cursor:pointer;font-size:16px;font-weight:600;color:var(--ink);transition:color var(--dur) var(--ease)}
.faq-q:hover{color:var(--brand)}
.faq-sign{flex-shrink:0;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-2);transition:transform 200ms var(--ease),background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease)}
.faq-item.is-open .faq-sign{transform:rotate(45deg);background:var(--brand);border-color:var(--brand);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height 280ms var(--ease)}
.faq-a p{padding:0 20px 24px;font-size:15px;line-height:1.85;color:var(--ink-2);max-width:80ch}

/* ---------- CTA 带 ---------- */
.cta-band{margin-top:96px;background:var(--dark);color:#fff;position:relative;overflow:hidden;border-radius:var(--r-lg)}
.cta-band::before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(115deg,rgba(255,90,31,.06) 0 2px,transparent 2px 14px);pointer-events:none}
.cta-inner{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:36px;padding:48px 48px}
.cta-inner h2{font-size:clamp(24px,2.8vw,32px);font-weight:800;max-width:520px}
.cta-inner p{margin-top:12px;color:rgba(255,255,255,.7);font-size:15px;max-width:520px}
.cta-actions{display:flex;gap:12px;flex-shrink:0;flex-wrap:wrap}

/* ---------- 交叉链接 ---------- */
.cross{margin-top:96px}
.cross-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:36px}
.cross-item{display:flex;flex-direction:column;gap:10px;padding:26px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-1);transition:all var(--dur) var(--ease)}
.cross-item:hover{border-color:var(--brand);transform:translateY(-2px);box-shadow:var(--sh-2)}
.cross-item .k{font-size:12px;letter-spacing:.08em;color:var(--ink-3);font-weight:600}
.cross-item .t{font-size:18px;font-weight:700}
.cross-item .d{font-size:14px;color:var(--ink-2);line-height:1.7}
.cross-item .go{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--brand);margin-top:6px}
.cross-item:hover .go .arw{transform:translateX(4px)}
.cross-item .go .arw{transition:transform var(--dur) var(--ease)}
.cross-item.is-current{border-color:var(--brand);border-style:dashed}
.cross-item.is-current .go{color:var(--ink-3)}

/* ---------- 页脚 ---------- */
.site-footer{margin-top:96px;background:var(--dark);color:rgba(255,255,255,.72);padding:72px 0 72px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;gap:48px}
.footer-logo{display:inline-flex;align-items:center;gap:12px;color:#fff}
.footer-logo .logo-mark{background:var(--brand);color:#fff}
.footer-logo .logo-sub{color:rgba(255,255,255,.55)}
.footer-about{margin-top:18px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);max-width:340px}
.footer-title{font-size:13px;letter-spacing:.1em;color:var(--brand);font-weight:700;margin-bottom:18px}
.footer-links{display:grid;gap:12px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.72);transition:color var(--dur) var(--ease),transform var(--dur) var(--ease);display:inline-block}
.footer-links a:hover{color:var(--brand);transform:translateX(2px)}
.footer-form{display:flex;gap:10px;margin-top:14px}
.footer-form input{flex:1;min-width:0;height:48px;padding:0 14px;border-radius:var(--r-md);border:1px solid var(--line-dark);background:rgba(255,255,255,.06);color:#fff;font-size:14px;transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease)}
.footer-form input::placeholder{color:rgba(255,255,255,.4)}
.footer-form input:focus{outline:none;border-color:var(--brand);box-shadow:var(--focus)}
.footer-hint{margin-top:10px;font-size:12px;color:rgba(255,255,255,.45)}
.footer-err{margin-top:8px;font-size:12px;color:#FF8552;display:none}
.footer-err.is-show{display:block}
.footer-hint.is-ok{color:#5FD3A3}
.footer-bottom{margin-top:56px;padding-top:24px;border-top:1px solid var(--line-dark);display:flex;justify-content:space-between;gap:16px;font-size:13px;color:rgba(255,255,255,.5);flex-wrap:wrap}

/* ---------- 底部转化条 / 返回顶部 ---------- */
.sticky-bar{position:fixed;left:0;right:0;bottom:0;z-index:45;background:#fff;border-top:1px solid var(--line);box-shadow:0 -10px 28px -18px rgba(16,18,22,.3);transform:translateY(110%);transition:transform var(--dur) var(--ease)}
.sticky-bar.is-show{transform:translateY(0)}
.sticky-inner{display:flex;align-items:center;justify-content:center;gap:20px;min-height:60px;padding:8px 0}
.sticky-text{font-size:14px;color:var(--ink-2)}
.sticky-close{width:32px;height:32px;border-radius:50%;border:1px solid var(--line);background:#fff;color:var(--ink-3);cursor:pointer;line-height:1;font-size:16px;transition:all var(--dur) var(--ease)}
.sticky-close:hover{border-color:var(--brand);color:var(--brand)}
.to-top{position:fixed;right:24px;bottom:88px;width:44px;height:44px;border-radius:var(--r-md);border:1px solid var(--line);background:#fff;color:var(--ink);cursor:pointer;box-shadow:var(--sh-2);opacity:0;visibility:hidden;transform:translateY(8px);transition:all var(--dur) var(--ease);z-index:44;font-size:16px}
.to-top.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--brand);color:#fff;border-color:var(--brand)}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 420ms var(--ease),transform 420ms var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{max-width:1200px}
}
@media (max-width:1023px){
  .container{padding:0 24px}
  .section,.flow,.cross{padding-top:72px;margin-top:0}
  .flow-item{grid-template-columns:1fr;gap:32px;padding-bottom:64px}
  .flow-item + .flow-item{padding-top:64px}
  .flow-item.is-rev .flow-media{order:0}
  .nav-toggle{display:flex}
  .nav-actions{display:none}
  .nav-list{position:fixed;top:0;right:0;height:100vh;width:86%;max-width:360px;background:var(--surface);flex-direction:column;align-items:stretch;gap:0;padding:88px 24px 32px;transform:translateX(100%);transition:transform var(--dur) var(--ease);box-shadow:var(--sh-3);z-index:60;overflow-y:auto}
  body.nav-open .nav-list{transform:translateX(0)}
  .nav-list li{border-bottom:1px solid var(--line)}
  .nav-link{display:block;padding:16px 4px;font-size:16px}
  .nav-link::after{display:none}
  .cta-band{margin-top:72px}
  .cta-inner{flex-direction:column;align-items:flex-start;padding:36px 28px}
  .cross{margin-top:72px}
  .cross-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .site-footer{margin-top:72px;padding-bottom:88px}
  .hero-stats{gap:32px;margin-top:32px}
}
@media (max-width:639px){
  body{font-size:16px}
  .container{padding:0 16px}
  .section,.flow,.cross{padding-top:56px}
  .topbar-right .topbar-link{display:none}
  .cat-hero{padding-top:48px}
  .cat-hero h1{font-size:clamp(30px,8vw,34px)}
  .cat-banner{aspect-ratio:16/9}
  .hero-stats{gap:24px}
  .hero-stats .num{font-size:30px}
  .flow-item + .flow-item{padding-top:56px}
  .flow-item{padding-bottom:56px}
  .notice{padding:20px;gap:14px;margin-bottom:56px}
  .cta-band{margin-top:56px}
  .cross{margin-top:56px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-form{flex-direction:column}
  .footer-form .btn{width:100%}
  .footer-bottom{flex-direction:column}
  .btn{width:100%}
  .cta-actions .btn{width:100%}
  .sticky-inner{justify-content:space-between;gap:12px;padding:8px 16px}
  .sticky-text{font-size:13px;line-height:1.5}
  .sticky-bar .btn{width:auto}
  .to-top{right:16px;bottom:76px}
  .compare td:first-child{width:38%}
  .compare th,.compare td{padding:12px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:0ms!important}
  .reveal{transform:none}
  .btn:hover,.cross-item:hover{transform:none}
  .flow-item:hover .flow-media img{transform:none}
}

/* roulang page: category3 */
:root{
  --bg:#F7F5F1;--surface:#FFFFFF;--surface-2:#EFECE6;--dark:#101216;--dark-2:#1B1E24;
  --ink:#101216;--ink-2:#4A5058;--ink-3:#8A9099;--line:#E7E3DC;--line-dark:rgba(255,255,255,.12);
  --brand:#FF5A1F;--brand-600:#E64A12;--brand-soft:#FFEDE5;
  --accent:#6D4AFF;--accent-soft:#EDE8FF;
  --ok:#1F9D6B;--warn:#C98A00;--err:#D93B3B;
  --r-sm:6px;--r-md:10px;--r-lg:16px;--r-pill:999px;
  --sh-1:0 1px 2px rgba(16,18,22,.06);--sh-2:0 10px 28px -14px rgba(16,18,22,.22);--sh-3:0 24px 60px -28px rgba(16,18,22,.32);
  --focus:0 0 0 3px rgba(255,90,31,.30);
  --ease:cubic-bezier(.2,.7,.3,1);--dur:240ms;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:17px;line-height:1.85;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color var(--dur) var(--ease)}
button,input{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
p{color:var(--ink-2)}
:focus-visible{outline:none;box-shadow:var(--focus);border-radius:var(--r-sm)}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
@media (max-width:1023px){.container{padding:0 24px}}
@media (max-width:639px){.container{padding:0 16px}}
@media (min-width:1440px){.container{max-width:1280px}}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--dark);color:#E9E6E0}
.topbar-inner{height:36px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.topbar-note{font-size:12px;color:rgba(255,255,255,.72);letter-spacing:.02em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-right{display:flex;align-items:center;gap:18px;flex-shrink:0}
.topbar-link{font-size:12px;color:rgba(255,255,255,.6)}
.topbar-link:hover{color:#fff}
.topbar-cta{font-size:13px;font-weight:600;color:var(--brand)}
.topbar-cta:hover{color:#FFB795}
@media (max-width:639px){.topbar-link{display:none}.topbar-note{font-size:11px}}

/* ---------- 主导航 ---------- */
.site-header{position:sticky;top:0;z-index:80}
.mainnav{background:rgba(247,245,241,.88);backdrop-filter:saturate(160%) blur(12px);border-bottom:1px solid transparent;transition:background var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease)}
.site-header.is-scrolled .mainnav{background:#fff;border-bottom-color:var(--line);box-shadow:var(--sh-1)}
.nav-inner{display:flex;align-items:center;height:68px;gap:22px}
.logo{display:flex;align-items:center;gap:10px;margin-right:auto}
.logo-mark{
  width:38px;height:38px;border-radius:var(--r-sm);background:var(--brand);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:900;letter-spacing:.04em;flex-shrink:0
}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-main{font-size:20px;font-weight:900;letter-spacing:-.01em}
.logo-sub{font-size:11px;font-weight:600;letter-spacing:.14em;color:var(--brand)}
.nav-list{display:flex;align-items:center;gap:26px}
.nav-link{position:relative;font-size:14px;font-weight:500;color:var(--ink-2);padding:6px 0;display:inline-block}
.nav-link::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--brand);transition:width var(--dur) var(--ease)}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{width:100%}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-toggle{display:none;width:44px;height:44px;flex-direction:column;align-items:center;justify-content:center;gap:5px;border:1px solid var(--line);border-radius:var(--r-sm);background:#fff}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink);transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease)}
.nav-mask{position:fixed;inset:0;background:rgba(16,18,22,.5);opacity:0;visibility:hidden;transition:opacity var(--dur) var(--ease),visibility var(--dur) var(--ease);z-index:90}
body.nav-open .nav-mask{opacity:1;visibility:visible}
body.nav-open{overflow:hidden}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 22px;border-radius:var(--r-md);font-size:15px;font-weight:600;cursor:pointer;border:1.5px solid transparent;transition:all var(--dur) var(--ease);white-space:nowrap}
.btn-sm{height:38px;padding:0 16px;font-size:13px;border-radius:var(--r-sm)}
.btn-lg{height:52px;padding:0 28px;font-size:16px}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-600);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-ghost{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-ghost:hover{background:var(--ink);color:#fff}
.btn-outline-light{border-color:rgba(255,255,255,.4);color:#fff;background:transparent}
.btn-outline-light:hover{background:#fff;color:var(--ink);border-color:#fff}
.btn:disabled{opacity:.4;cursor:default;transform:none;box-shadow:none}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);border-bottom:1px solid rgba(255,90,31,.35);padding-bottom:2px}
.text-link .arw{transition:transform var(--dur) var(--ease)}
.text-link:hover{border-bottom-color:var(--brand)}
.text-link:hover .arw{transform:translateX(4px)}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0}
.section-alt{background:var(--surface)}
.eyebrow{display:inline-block;font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--brand);margin-bottom:12px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:48px}
.section-head h2{font-size:clamp(28px,3.4vw,40px);font-weight:800;line-height:1.2;letter-spacing:-.01em;max-width:22em}
.section-sub{font-size:15px;color:var(--ink-2);max-width:46em;margin-top:12px}
@media (max-width:1023px){.section{padding:72px 0}.section-head{flex-direction:column;align-items:flex-start;margin-bottom:36px}}
@media (max-width:639px){.section{padding:56px 0}}

/* ---------- 页头（强调色浅底） ---------- */
.page-hero{background:var(--brand-soft);padding:72px 0 64px;position:relative;overflow:hidden}
.page-hero::before{
  content:"";position:absolute;right:-140px;top:-120px;width:460px;height:460px;border-radius:50%;
  background:radial-gradient(circle,rgba(109,74,255,.14),rgba(109,74,255,0) 68%);
}
.page-hero .container{position:relative;z-index:1}
.page-hero .pill{display:inline-block;font-size:12px;font-weight:600;letter-spacing:.1em;color:var(--brand-600);background:#fff;border:1px solid rgba(255,90,31,.28);border-radius:var(--r-pill);padding:7px 16px;margin-bottom:20px}
.page-hero h1{font-size:clamp(34px,4.6vw,48px);font-weight:900;line-height:1.14;letter-spacing:-.02em;max-width:18em}
.page-hero .lede{font-size:17px;color:var(--ink-2);max-width:44em;margin-top:18px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.hero-banner{margin-top:44px;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-2);aspect-ratio:21/9;background:var(--surface-2)}
.hero-banner img{width:100%;height:100%;object-fit:cover}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.hero-meta span{font-size:12px;font-weight:500;color:var(--ink-2);background:rgba(255,255,255,.72);border:1px solid rgba(255,90,31,.18);border-radius:var(--r-pill);padding:5px 13px}
@media (max-width:639px){
  .page-hero{padding:48px 0 44px}
  .hero-actions .btn{width:100%}
  .hero-banner{aspect-ratio:16/9;margin-top:32px}
}

/* ---------- 数据带 ---------- */
.statband{background:var(--dark);color:#F3F0EB}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:52px 32px}
.stat{border-left:1px solid var(--line-dark);padding-left:20px}
.stat:first-child{border-left:0;padding-left:0}
.stat-num{display:block;font-size:44px;font-weight:900;line-height:1;font-variant-numeric:tabular-nums;color:#fff}
.stat-label{display:block;font-size:12px;letter-spacing:.06em;color:rgba(255,255,255,.58);margin-top:10px}
@media (max-width:1023px){.stat-grid{grid-template-columns:repeat(2,1fr);padding:40px 24px}.stat-num{font-size:36px}}
@media (max-width:639px){.stat-grid{grid-template-columns:repeat(2,1fr);gap:20px;padding:32px 16px}.stat:nth-child(3){border-left:0;padding-left:0}.stat-num{font-size:30px}}

/* ---------- 功能矩阵卡片 ---------- */
.matrix-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.mx-card{
  display:grid;grid-template-columns:2fr 3fr;min-height:196px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease)
}
.mx-card:hover{transform:translateY(-2px);border-color:var(--brand);box-shadow:var(--sh-2)}
.mx-media{overflow:hidden;background:var(--surface-2)}
.mx-media img{width:100%;height:100%;object-fit:cover;transition:transform 400ms var(--ease)}
.mx-card:hover .mx-media img{transform:scale(1.04)}
.mx-body{padding:22px 24px;display:flex;flex-direction:column;gap:9px}
.tag{display:inline-block;align-self:flex-start;font-size:12px;font-weight:600;color:var(--brand);background:var(--brand-soft);border-radius:var(--r-pill);padding:4px 12px}
.mx-body h3{font-size:19px;font-weight:700;line-height:1.35}
.mx-body p{font-size:14px;line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.mx-body .text-link{margin-top:auto;align-self:flex-start}
@media (max-width:1023px){.matrix-grid{grid-template-columns:1fr;gap:16px}}
@media (max-width:639px){
  .mx-card{grid-template-columns:1fr;min-height:0}
  .mx-media{height:150px}
  .mx-body{padding:18px}
}

/* ---------- 问答折叠 ---------- */
.qa-section{background:var(--surface-2)}
.faq-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:8px 28px;box-shadow:var(--sh-1)}
.faq-item{position:relative;border-bottom:1px solid var(--line)}
.faq-item:last-child{border-bottom:0}
.faq-item::before{content:"";position:absolute;left:0;top:10px;bottom:10px;width:2px;background:var(--brand);transform:scaleY(0);transform-origin:top;transition:transform var(--dur) var(--ease)}
.faq-item.is-open::before{transform:scaleY(1)}
.faq-q{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;width:100%;text-align:left;padding:22px 6px;font-size:16px;font-weight:600;color:var(--ink);transition:color var(--dur) var(--ease)}
.faq-q:hover{color:var(--brand)}
.faq-icon{position:relative;flex-shrink:0;width:20px;height:20px;margin-top:4px}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--brand);border-radius:2px;transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease)}
.faq-icon::before{left:0;top:9px;width:20px;height:2px}
.faq-icon::after{left:9px;top:0;width:2px;height:20px}
.faq-item.is-open .faq-icon::after{transform:rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height 280ms var(--ease)}
.faq-a-inner{padding:0 42px 22px 6px;font-size:15px;line-height:1.85;color:var(--ink-2)}
@media (max-width:639px){
  .faq-panel{padding:4px 16px}
  .faq-q{font-size:15px;padding:18px 2px}
  .faq-a-inner{padding:0 6px 18px}
}

/* ---------- 自查顺序 ---------- */
.steps-grid{display:grid;grid-template-columns:1fr 1.45fr;gap:64px;align-items:start}
.steps-aside{position:sticky;top:104px}
.steps-aside h2{font-size:clamp(26px,3vw,34px);font-weight:800;line-height:1.22;letter-spacing:-.01em}
.steps-aside p{font-size:15px;margin-top:14px}
.steps-list{border-top:1px solid var(--line)}
.step-item{display:flex;gap:24px;padding:26px 0;border-bottom:1px solid var(--line);transition:transform var(--dur) var(--ease)}
.step-item:hover{transform:translateX(4px)}
.step-num{font-size:44px;font-weight:900;line-height:1;color:transparent;-webkit-text-stroke:1px #C9C3B8;font-variant-numeric:tabular-nums;flex-shrink:0;transition:color var(--dur) var(--ease),-webkit-text-stroke-color var(--dur) var(--ease)}
.step-item:hover .step-num{color:var(--brand);-webkit-text-stroke-color:var(--brand)}
.step-item h3{font-size:20px;font-weight:700;margin-bottom:8px}
.step-item p{font-size:15px}
@media (max-width:1023px){
  .steps-grid{grid-template-columns:1fr;gap:36px}
  .steps-aside{position:static}
}
@media (max-width:639px){.step-item{gap:16px}.step-num{font-size:32px}}

/* ---------- 交叉链接 ---------- */
.cross-section{background:var(--surface)}
.cross-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cross-card{
  display:flex;flex-direction:column;gap:8px;padding:24px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-1);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease)
}
.cross-card:hover{transform:translateY(-2px);border-color:var(--brand);box-shadow:var(--sh-2)}
.cross-label{font-size:12px;font-weight:600;letter-spacing:.1em;color:var(--ink-3)}
.cross-card strong{font-size:18px;font-weight:700}
.cross-desc{font-size:14px;color:var(--ink-2);line-height:1.7}
.cross-arw{font-size:18px;color:var(--brand);transition:transform var(--dur) var(--ease);margin-top:2px}
.cross-card:hover .cross-arw{transform:translateX(6px)}
@media (max-width:1023px){.cross-grid{grid-template-columns:1fr}}

/* ---------- CTA 带 ---------- */
.cta-band{background:var(--dark);position:relative;overflow:hidden;padding:72px 0}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(135deg,rgba(255,90,31,.05) 0 2px,rgba(255,90,31,0) 2px 14px);
  pointer-events:none;
}
.cta-inner{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:40px}
.cta-inner h2{font-size:clamp(26px,3.2vw,36px);font-weight:800;line-height:1.24;color:#fff;max-width:20em}
.cta-inner p{color:rgba(255,255,255,.66);font-size:15px;margin-top:12px;max-width:44em}
.cta-actions{display:flex;gap:12px;flex-shrink:0}
@media (max-width:1023px){.cta-inner{flex-direction:column;align-items:flex-start}.cta-actions{width:100%;flex-wrap:wrap}}
@media (max-width:639px){.cta-band{padding:48px 0}.cta-actions .btn{width:100%}}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark-2);color:#E9E6E0;padding:64px 0 0;padding-bottom:72px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.5fr;gap:40px;padding-bottom:48px}
.footer-logo{display:flex;align-items:center;gap:10px;margin-bottom:18px}
.footer-logo .logo-main{color:#fff}
.footer-about{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6)}
.footer-title{font-size:13px;font-weight:600;letter-spacing:.1em;color:var(--brand);margin-bottom:16px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.72);transition:color var(--dur) var(--ease),transform var(--dur) var(--ease);display:inline-block}
.footer-links a:hover{color:var(--brand);transform:translateX(2px)}
.footer-form{display:flex;gap:8px;margin-top:14px}
.footer-form input{
  flex:1;min-width:0;height:48px;padding:0 14px;border:1px solid var(--line-dark);border-radius:var(--r-md);
  background:rgba(255,255,255,.04);color:#fff;font-size:14px;transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease)
}
.footer-form input::placeholder{color:rgba(255,255,255,.38)}
.footer-form input:focus{outline:none;border-color:var(--brand);box-shadow:var(--focus)}
.footer-hint{font-size:12px;color:rgba(255,255,255,.44);margin-top:10px}
.footer-err{font-size:12px;color:#FF8A6A;margin-top:6px;display:none}
.footer-err.is-show{display:block}
.footer-bottom{
  border-top:1px solid var(--line-dark);padding-top:22px;display:flex;justify-content:space-between;
  gap:16px;font-size:12px;color:rgba(255,255,255,.44);flex-wrap:wrap
}
@media (max-width:1023px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px}}
@media (max-width:639px){
  .site-footer{padding-top:48px}
  .footer-grid{grid-template-columns:1fr}
  .footer-form{flex-direction:column}
  .footer-form .btn{width:100%}
}

/* ---------- 底部转化条 / 返回顶部 ---------- */
.sticky-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:85;background:#fff;border-top:1px solid var(--line);
  box-shadow:0 -12px 32px -22px rgba(16,18,22,.42);transform:translateY(110%);
  transition:transform var(--dur) var(--ease)
}
.sticky-cta.is-visible{transform:translateY(0)}
.sticky-cta.is-hidden{display:none}
.sticky-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-top:12px;padding-bottom:12px}
.sticky-text{font-size:14px;color:var(--ink-2)}
.sticky-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.sticky-close{width:36px;height:36px;border:1px solid var(--line);border-radius:var(--r-sm);font-size:18px;line-height:1;color:var(--ink-3);transition:all var(--dur) var(--ease)}
.sticky-close:hover{color:var(--ink);border-color:var(--ink)}
.to-top{
  position:fixed;right:24px;bottom:96px;z-index:60;width:44px;height:44px;border-radius:var(--r-sm);
  background:var(--dark);color:#fff;font-size:18px;box-shadow:var(--sh-2);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility var(--dur) var(--ease)
}
.to-top.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--brand)}
@media (max-width:639px){
  .sticky-text{font-size:13px;line-height:1.5}
  .sticky-inner{align-items:center}
  .to-top{right:16px;bottom:84px}
}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 420ms var(--ease),transform 420ms var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:1ms!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* ---------- 移动端导航抽屉 ---------- */
@media (max-width:1023px){
  .nav-inner{height:60px}
  .nav-toggle{display:flex}
  .nav-actions{display:none}
  .nav-list{
    position:fixed;top:0;right:0;height:100%;width:86%;max-width:360px;background:#fff;
    flex-direction:column;align-items:stretch;gap:0;padding:96px 24px 24px;z-index:95;
    transform:translateX(100%);transition:transform var(--dur) var(--ease);box-shadow:var(--sh-3)
  }
  body.nav-open .nav-list{transform:translateX(0)}
  .nav-list li{border-bottom:1px solid var(--line)}
  .nav-link{display:block;padding:16px 0;font-size:16px}
  .nav-link::after{display:none}
  .nav-link.is-active{color:var(--brand)}
  body.nav-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  body.nav-open .nav-toggle span:nth-child(2){opacity:0}
  body.nav-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .logo-main{font-size:18px}
}