/* roulang page: index */
/* ============================================================
   pg国际网 设计系统
   ============================================================ */
:root{
  --brand-900:#0A2E2A;
  --brand-700:#10514A;
  --brand-600:#14655C;
  --brand-500:#1F8074;
  --brand-300:#8FC9C0;
  --brand-050:#ECF5F2;
  --accent-600:#D95A33;
  --accent-500:#F0764C;
  --accent-200:#FFD9CB;
  --ink-900:#16211F;
  --ink-700:#33403D;
  --ink-500:#5C6B67;
  --ink-300:#9AA7A3;
  --line:#E3E8E6;
  --bg:#F7F6F2;
  --bg-alt:#EFF3F1;
  --surface:#FFFFFF;
  --dark:#0B2724;
  --danger:#C8452F;
  --success:#2E7D5B;
  --warning:#B7791F;

  --radius-card:16px;
  --radius-img:12px;
  --radius-pill:999px;
  --radius-banner:20px;

  --shadow-sm:0 1px 2px rgba(10,46,42,.06);
  --shadow-md:0 8px 24px rgba(10,46,42,.10);
  --shadow-lg:0 20px 48px rgba(10,46,42,.14);

  --container:1200px;
  --ease:180ms cubic-bezier(.2,.7,.3,1);
  --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:104px}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:17px;
  line-height:1.85;
  color:var(--ink-900);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,textarea,select{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}
strong{font-weight:700}
:focus-visible{outline:2px solid var(--accent-500);outline-offset:2px;border-radius:6px}

/* ---------- 排版层级 ---------- */
.h1{font-size:clamp(34px,4.4vw,56px);line-height:1.15;letter-spacing:-.5px;font-weight:700}
h2,.h2{font-size:clamp(26px,2.7vw,38px);line-height:1.25;font-weight:700;letter-spacing:-.3px}
h3,.h3{font-size:clamp(20px,1.8vw,24px);line-height:1.35;font-weight:700}
h4,.h4{font-size:clamp(17px,1.4vw,19px);line-height:1.45;font-weight:700}
.lead{font-size:18px;line-height:1.8;color:var(--ink-700)}
.muted{color:var(--ink-500)}
.small{font-size:14px;line-height:1.6}
.tiny{font-size:13px;line-height:1.6}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}

/* ---------- 布局 ---------- */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}
.section{padding:96px 0}
.section--alt{background:var(--bg-alt)}
.section--white{background:var(--surface)}
.section--dark{background:var(--dark);color:#fff}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px}
.section-head .section-note{font-size:14px;color:var(--ink-500);max-width:420px;text-align:right}
.section--dark .section-head .section-note{color:rgba(255,255,255,.64)}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ---------- 导航 ---------- */
.site-header{position:fixed;top:16px;left:0;right:0;z-index:90}
.nav-shell{
  width:min(1120px,calc(100% - 32px));
  margin:0 auto;
  height:64px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:0 14px 0 18px;
  background:rgba(255,255,255,.82);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  box-shadow:var(--shadow-sm);
  transition:height var(--ease),background var(--ease),box-shadow var(--ease);
}
.site-header.is-scrolled .nav-shell{height:56px;background:#fff;box-shadow:var(--shadow-md)}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{width:34px;height:34px;color:var(--brand-600);flex:0 0 auto}
.logo-text{font-size:18px;font-weight:700;letter-spacing:.2px;color:var(--brand-900)}
.nav-panel{display:flex;align-items:center;gap:8px;flex:1 1 auto;justify-content:space-between}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-link{
  display:inline-block;
  padding:8px 14px;
  font-size:15px;
  font-weight:500;
  color:var(--ink-700);
  border-radius:var(--radius-pill);
  position:relative;
  transition:color var(--ease),background var(--ease);
}
.nav-link:hover{color:var(--brand-600);background:var(--brand-050)}
.nav-link::after{
  content:"";
  position:absolute;
  left:50%;bottom:2px;
  width:0;height:2px;
  background:var(--brand-600);
  border-radius:2px;
  transform:translateX(-50%);
  transition:width var(--ease);
}
.nav-link.is-active{color:var(--brand-600);font-weight:600}
.nav-link.is-active::after{width:18px}
.nav-actions{display:flex;align-items:center;gap:10px}
.nav-toggle{
  display:none;
  width:42px;height:42px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line);
  background:#fff;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:5px;
  transition:background var(--ease);
}
.nav-toggle:hover{background:var(--brand-050)}
.nav-toggle span{display:block;width:16px;height:2px;background:var(--brand-700);border-radius:2px;transition:transform var(--ease),opacity 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;
  padding:14px 28px;
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  cursor:pointer;
  transition:transform var(--ease),background var(--ease),box-shadow var(--ease),color var(--ease),border-color var(--ease);
  white-space:nowrap;
}
.btn:active{transform:translateY(0);box-shadow:var(--shadow-sm)}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:var(--shadow-sm)}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-2px);box-shadow:var(--shadow-md)}
.btn-ghost{background:transparent;color:var(--brand-700);border-color:var(--brand-600);border-width:1.5px}
.btn-ghost:hover{background:var(--brand-050);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.btn-light{background:#fff;color:var(--brand-700)}
.btn-light:hover{background:var(--accent-200);color:var(--brand-900);transform:translateY(-2px);box-shadow:var(--shadow-md)}
.btn-sm{padding:10px 20px;font-size:14px}
.btn-block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}
.btn.is-loading{pointer-events:none;opacity:.75}
.spinner{
  width:15px;height:15px;
  border-radius:50%;
  border:2px solid rgba(255,255,255,.4);
  border-top-color:#fff;
  animation:spin .7s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}
.link-more{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--brand-600);
  position:relative;padding-bottom:2px;
}
.link-more::after{content:"";position:absolute;left:0;bottom:0;width:0;height:1.5px;background:var(--accent-500);transition:width var(--ease)}
.link-more:hover::after{width:100%}
.link-more:hover{color:var(--accent-600)}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.3px;
  border-radius:var(--radius-pill);
  background:var(--brand-050);
  color:var(--brand-700);
  white-space:nowrap;
}
.badge-accent{background:var(--accent-200);color:var(--accent-600)}
.badge-success{background:rgba(46,125,91,.12);color:var(--success)}
.badge-warning{background:rgba(183,121,31,.14);color:var(--warning)}
.badge-danger{background:rgba(200,69,47,.12);color:var(--danger)}
.tag{
  display:inline-block;
  padding:4px 12px;
  font-size:12.5px;
  color:var(--ink-700);
  background:var(--bg-alt);
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  transition:background var(--ease),color var(--ease);
}
.tag:hover{background:var(--brand-050);color:var(--brand-700)}

/* ---------- Hero ---------- */
.hero{
  padding:150px 0 96px;
  min-height:88vh;
  display:flex;
  align-items:center;
  background:
    radial-gradient(1100px 520px at 88% -8%,rgba(143,201,192,.30),transparent 62%),
    radial-gradient(760px 420px at 4% 108%,rgba(240,118,76,.14),transparent 60%),
    var(--bg);
}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center;width:100%}
.hero-copy .badge{margin-bottom:20px}
.hero-title{margin-bottom:20px;color:var(--brand-900)}
.hero-title em{font-style:normal;color:var(--brand-600)}
.hero-sub{font-size:18px;line-height:1.85;color:var(--ink-700);max-width:560px;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:32px}
.trust-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:0;
  border-top:1px solid var(--line);
  padding-top:22px;
}
.trust-row li{display:flex;flex-direction:column;gap:2px;padding-right:26px;margin-right:26px;border-right:1px solid var(--line)}
.trust-row li:last-child{border-right:0;margin-right:0;padding-right:0}
.trust-row strong{font-size:20px;font-weight:700;color:var(--brand-700);font-variant-numeric:tabular-nums}
.trust-row span{font-size:13px;color:var(--ink-500)}
.hero-media{position:relative}
.hero-media img{
  width:100%;
  aspect-ratio:16/11;
  object-fit:cover;
  border-radius:var(--radius-banner);
  box-shadow:var(--shadow-lg);
  box-shadow:var(--shadow-lg),inset 0 0 0 1px rgba(10,46,42,.06);
}
.hero-float{
  position:absolute;
  left:-18px;
  bottom:-24px;
  width:min(300px,86%);
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:18px 20px;
  box-shadow:var(--shadow-md);
}
.hero-float strong{display:block;font-size:14px;color:var(--brand-700);margin-bottom:6px}
.hero-float p{font-size:13.5px;line-height:1.7;color:var(--ink-500)}

/* ---------- 卖点编号列表 ---------- */
.value-list{border-top:1px solid var(--line)}
.value-row{
  display:grid;
  grid-template-columns:96px 1fr 320px;
  gap:24px;
  align-items:center;
  padding:28px 20px;
  border-bottom:1px solid var(--line);
  border-radius:12px;
  transition:background var(--ease),transform var(--ease);
}
.value-row:hover{background:var(--brand-050);transform:translateX(4px)}
.value-num{
  font-size:48px;font-weight:700;line-height:1;
  color:var(--brand-300);
  font-variant-numeric:tabular-nums;
  letter-spacing:-1px;
}
.value-row:hover .value-num{color:var(--brand-500)}
.value-main h3{margin-bottom:8px;color:var(--brand-900)}
.value-main p{font-size:15.5px;line-height:1.8;color:var(--ink-500);max-width:560px}
.value-side{font-size:14px;color:var(--ink-500);line-height:1.7;text-align:right}

/* ---------- 内联 CTA 条 ---------- */
.cta-strip{background:var(--brand-050);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.cta-strip .container{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-top:20px;padding-bottom:20px}
.cta-strip p{font-size:15.5px;color:var(--brand-700);font-weight:500}
.cta-strip p strong{color:var(--brand-900)}

/* ---------- 演示区 ---------- */
.demo-grid{display:grid;grid-template-columns:280px 1fr;gap:40px;align-items:start}
.demo-tabs{display:flex;flex-direction:column;gap:10px;position:sticky;top:104px}
.demo-tab{
  text-align:left;
  padding:14px 20px;
  font-size:15px;
  font-weight:600;
  color:var(--ink-700);
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  transition:all var(--ease);
}
.demo-tab:hover{border-color:var(--brand-300);color:var(--brand-600);transform:translateX(3px)}
.demo-tab.is-active{background:var(--brand-600);color:#fff;border-color:var(--brand-600);box-shadow:var(--shadow-md)}
.demo-panel{display:none}
.demo-panel.is-active{display:block;animation:fadeUp 320ms cubic-bezier(.2,.7,.3,1) both}
.demo-figure img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  border-radius:var(--radius-banner);
  box-shadow:var(--shadow-md);
}
.demo-points{margin-top:26px;display:grid;gap:12px}
.demo-points li{display:flex;gap:12px;font-size:15.5px;line-height:1.75;color:var(--ink-700)}
.demo-points li::before{
  content:"";
  flex:0 0 auto;
  width:9px;height:9px;
  margin-top:10px;
  background:var(--accent-500);
  border-radius:2px;
}

/* ---------- 证据区 ---------- */
.section--dark .section-head h2{color:#fff}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,.12)}
.stat-num{
  font-size:clamp(34px,3.8vw,52px);
  font-weight:700;line-height:1.05;
  color:#fff;
  font-variant-numeric:tabular-nums;
  letter-spacing:-1px;
}
.stat-num span{font-size:20px;color:var(--brand-300);margin-left:4px;letter-spacing:0}
.stat-label{font-size:13px;color:rgba(255,255,255,.64);margin-top:8px}
.partner-row{
  display:flex;gap:14px;overflow-x:auto;padding:32px 0;
  border-bottom:1px solid rgba(255,255,255,.12);
  scrollbar-width:thin;
}
.partner-chip{
  flex:0 0 auto;
  height:36px;
  display:inline-flex;align-items:center;
  padding:0 20px;
  font-size:13.5px;
  letter-spacing:.4px;
  color:rgba(255,255,255,.6);
  border:1px solid rgba(255,255,255,.16);
  border-radius:var(--radius-pill);
  filter:grayscale(1);
  transition:all var(--ease);
}
.partner-chip:hover{color:#fff;filter:grayscale(0);border-color:var(--brand-300);background:rgba(143,201,192,.12)}
.quote-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;padding-top:40px}
.quote-card{
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.12);
  border-left:4px solid var(--accent-500);
  border-radius:0 var(--radius-card) var(--radius-card) 0;
  padding:26px 28px;
}
.quote-card p{font-size:16px;line-height:1.85;color:rgba(255,255,255,.92);margin-bottom:16px}
.quote-meta{font-size:13px;color:rgba(255,255,255,.6)}

/* ---------- 价格区 ---------- */
.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch;margin-top:12px}
.price-card{
  position:relative;
  display:flex;flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:32px 28px;
  box-shadow:var(--shadow-sm);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.price-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--brand-300)}
.price-card.is-featured{
  border:2px solid var(--brand-600);
  transform:scale(1.03);
  box-shadow:var(--shadow-lg);
  z-index:2;
}
.price-card.is-featured:hover{transform:scale(1.03) translateY(-4px)}
.price-flag{
  position:absolute;top:-13px;left:28px;
  background:var(--accent-500);color:#fff;
  font-size:12.5px;font-weight:600;letter-spacing:.3px;
  padding:5px 14px;border-radius:var(--radius-pill);
  box-shadow:var(--shadow-sm);
}
.price-name{font-size:19px;font-weight:700;color:var(--brand-900);margin-bottom:6px}
.price-desc{font-size:13.5px;color:var(--ink-500);margin-bottom:20px;min-height:44px}
.price-line{display:flex;align-items:baseline;gap:8px;padding-bottom:20px;border-bottom:1px solid var(--line);margin-bottom:20px}
.price-num{font-size:34px;font-weight:700;color:var(--brand-700);letter-spacing:-.5px;font-variant-numeric:tabular-nums}
.price-unit{font-size:13.5px;color:var(--ink-500)}
.price-feats{display:grid;gap:11px;margin-bottom:26px;flex:1 1 auto}
.price-feats li{display:flex;gap:10px;font-size:14.5px;line-height:1.7;color:var(--ink-700)}
.price-feats li::before{
  content:"✓";
  flex:0 0 auto;
  width:18px;height:18px;
  margin-top:5px;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:11px;font-weight:700;
  color:var(--brand-600);
  background:var(--brand-050);
  border-radius:50%;
}
.price-foot{font-size:13.5px;color:var(--ink-500);margin-top:20px;line-height:1.7}

/* ---------- 资讯列表 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  display:flex;flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--brand-300)}
.news-thumb{overflow:hidden;background:var(--bg-alt)}
.news-thumb img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  box-shadow:inset 0 0 0 1px rgba(10,46,42,.06);
  transition:transform 320ms cubic-bezier(.2,.7,.3,1);
}
.news-card:hover .news-thumb img{transform:scale(1.03)}
.news-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1 1 auto}
.news-body .badge{align-self:flex-start;margin-bottom:14px}
.news-body h3{
  font-size:19px;line-height:1.45;font-weight:700;color:var(--brand-900);
  margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-body p{
  font-size:14.5px;line-height:1.75;color:var(--ink-500);margin-bottom:18px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  margin-top:auto;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding-top:14px;border-top:1px solid var(--line);
  font-size:13px;color:var(--ink-500);
}
.news-meta .link-more{font-size:13px}
.empty-state{
  min-height:240px;
  border:1px dashed var(--line);
  border-radius:var(--radius-card);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;
  text-align:center;padding:40px 24px;background:var(--surface);
}
.empty-state svg{width:44px;height:44px;color:var(--brand-600);opacity:.3}
.empty-state strong{font-size:16px;font-weight:600;color:var(--ink-900)}
.empty-state span{font-size:14px;color:var(--ink-500)}
.empty-state .btn{margin-top:8px}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;
  text-align:left;
  font-size:17px;font-weight:600;color:var(--ink-900);
  transition:color var(--ease);
}
.faq-q:hover{color:var(--brand-600)}
.faq-icon{
  flex:0 0 auto;
  width:28px;height:28px;
  position:relative;
  border:1px solid var(--line);
  border-radius:50%;
  transition:transform 220ms cubic-bezier(.2,.7,.3,1),background var(--ease),border-color var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--brand-600);
  left:50%;top:50%;transform:translate(-50%,-50%);
}
.faq-icon::before{width:12px;height:1.6px}
.faq-icon::after{width:1.6px;height:12px}
.faq-item.is-open .faq-icon{transform:rotate(45deg);background:var(--brand-050);border-color:var(--brand-300)}
.faq-item.is-open .faq-q{color:var(--brand-600)}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height 220ms cubic-bezier(.2,.7,.3,1);
}
.faq-a-inner{padding:0 44px 24px 4px;font-size:15px;line-height:1.8;color:var(--ink-700)}

/* ---------- 结尾 CTA + 表单 ---------- */
.final-cta{background:var(--brand-700);color:#fff;padding:88px 0}
.final-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.final-cta h2{color:#fff;margin-bottom:16px}
.final-cta .final-sub{font-size:16.5px;line-height:1.85;color:rgba(255,255,255,.82);margin-bottom:28px;max-width:480px}
.contact-rows{display:grid;gap:14px;margin-bottom:28px}
.contact-row{display:flex;align-items:center;gap:12px;font-size:15px;color:rgba(255,255,255,.88)}
.contact-row svg{width:18px;height:18px;flex:0 0 auto;color:var(--brand-300)}
.form-card{
  background:var(--surface);
  border-radius:var(--radius-card);
  padding:30px;
  box-shadow:var(--shadow-lg);
  color:var(--ink-900);
}
.form-card h3{font-size:19px;margin-bottom:6px;color:var(--brand-900)}
.form-card .form-tip{font-size:13.5px;color:var(--ink-500);margin-bottom:22px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:7px}
.field--full{grid-column:1 / -1}
.field label{font-size:14px;font-weight:500;color:var(--ink-700)}
.field input,.field textarea{
  width:100%;
  padding:13px 15px;
  font-size:15px;
  color:var(--ink-900);
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:12px;
  min-height:48px;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.field textarea{min-height:104px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-300)}
.field input:focus,.field textarea:focus{
  outline:none;
  border-color:var(--brand-500);
  box-shadow:0 0 0 4px rgba(31,128,116,.14);
}
.field.has-error input,.field.has-error textarea{border-color:var(--danger)}
.field .err{font-size:13px;color:var(--danger);display:none}
.field.has-error .err{display:block}
.field.is-ok input,.field.is-ok textarea{border-color:var(--success)}
.form-actions{grid-column:1 / -1;display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.form-msg{font-size:13.5px;display:none}
.form-msg.show{display:block}
.form-msg.ok{color:var(--success)}
.form-msg.bad{color:var(--danger)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.88);padding:72px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.footer-brand .logo-text{color:#fff}
.footer-brand .logo-mark{color:var(--brand-300)}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.64);max-width:320px}
.footer-col h4{font-size:14px;font-weight:600;letter-spacing:.4px;color:#fff;margin-bottom:18px}
.footer-col ul{display:grid;gap:11px}
.footer-col a,.footer-col li{font-size:14px;color:rgba(255,255,255,.64);line-height:1.7;transition:color var(--ease)}
.footer-col a:hover{color:var(--accent-500);text-decoration:underline;text-underline-offset:3px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  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,.64);
}
.footer-bottom a{color:rgba(255,255,255,.64)}
.footer-bottom a:hover{color:var(--accent-500)}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;
  right:24px;bottom:28px;
  z-index:70;
  display:flex;flex-direction:column;align-items:flex-end;gap:10px;
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity 220ms var(--ease),transform 220ms var(--ease),visibility 220ms;
}
.float-cta.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta .btn{box-shadow:var(--shadow-md)}
.to-top{
  width:46px;height:46px;
  border-radius:50%;
  background:var(--surface);
  border:1px solid var(--line);
  color:var(--brand-700);
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-sm);
  transition:all var(--ease);
}
.to-top:hover{background:var(--brand-050);border-color:var(--brand-300);transform:translateY(-2px);box-shadow:var(--shadow-md)}
.to-top svg{width:18px;height:18px}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 420ms cubic-bezier(.2,.7,.3,1),transform 420ms cubic-bezier(.2,.7,.3,1)}
.reveal.is-in{opacity:1;transform:none}
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}

/* ---------- 断点 ---------- */
@media (max-width:1199px){
  .container{padding:0 24px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero{padding:132px 0 80px;min-height:auto}
  .value-row{grid-template-columns:72px 1fr 240px;gap:20px}
  .value-num{font-size:40px}
  .grid-3,.news-grid{grid-template-columns:repeat(2,1fr)}
  .pricing-grid{grid-template-columns:repeat(3,1fr);gap:18px}
  .price-card{padding:26px 22px}
  .stats{grid-template-columns:repeat(4,1fr);gap:18px}
}
@media (max-width:1023px){
  .section{padding:72px 0}
  .nav-toggle{display:inline-flex}
  .nav-panel{
    position:fixed;
    top:88px;left:16px;right:16px;
    flex-direction:column;
    align-items:stretch;
    gap:8px;
    padding:20px;
    background:#fff;
    border:1px solid var(--line);
    border-radius:0 0 20px 20px;
    box-shadow:var(--shadow-lg);
    transform:translateY(-12px);
    opacity:0;visibility:hidden;
    transition:opacity 200ms var(--ease),transform 200ms var(--ease),visibility 200ms;
    max-height:calc(100vh - 120px);
    overflow-y:auto;
  }
  .nav-panel.is-open{opacity:1;visibility:visible;transform:translateY(0)}
  .nav-links{flex-direction:column;align-items:stretch;gap:4px}
  .nav-link{padding:13px 16px;font-size:16px;border-radius:12px}
  .nav-link::after{display:none}
  .nav-link.is-active{background:var(--brand-050)}
  .nav-actions{margin-top:10px}
  .nav-actions .btn{width:100%}
  .demo-grid{grid-template-columns:1fr;gap:28px}
  .demo-tabs{position:static;flex-direction:row;overflow-x:auto;padding-bottom:6px}
  .demo-tab{flex:0 0 auto}
  .demo-tab:hover{transform:none}
  .demo-panel.is-active .demo-figure{order:-1}
  .final-grid{grid-template-columns:1fr;gap:40px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .quote-grid{grid-template-columns:1fr}
  .pricing-grid{grid-template-columns:1fr;max-width:520px;margin-left:auto;margin-right:auto}
  .price-card.is-featured{transform:none}
  .price-card.is-featured:hover{transform:translateY(-4px)}
  .stats{grid-template-columns:repeat(2,1fr);gap:28px}
  .value-row{grid-template-columns:64px 1fr;row-gap:10px}
  .value-side{grid-column:2;text-align:left}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 20px}
  .section{padding:56px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px;margin-bottom:24px}
  .section-head .section-note{text-align:left;max-width:100%}
  .grid-3,.grid-2,.news-grid{grid-template-columns:1fr}
  .hero{padding:120px 0 64px}
  .hero-actions .btn{flex:1 1 100%}
  .trust-row{gap:16px 0}
  .trust-row li{padding-right:18px;margin-right:18px}
  .hero-float{position:static;width:100%;margin-top:16px;left:auto;bottom:auto}
  .cta-strip .container{flex-direction:column;align-items:flex-start;gap:12px}
  .cta-strip .btn{width:100%}
  .form-grid{grid-template-columns:1fr}
  .form-card{padding:24px 20px}
  .form-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;text-align:left}
  .float-cta{
    left:0;right:0;bottom:0;
    flex-direction:column;
    gap:8px;
    padding:10px 16px calc(10px + env(safe-area-inset-bottom));
    background:rgba(255,255,255,.94);
    -webkit-backdrop-filter:blur(12px);
    backdrop-filter:blur(12px);
    border-top:1px solid var(--line);
  }
  .float-cta .btn{width:100%}
  .to-top{display:none}
  .site-footer{padding-bottom:72px}
}
@media (max-width:479px){
  .h1{font-size:30px}
  h2,.h2{font-size:23px}
  .btn{padding:13px 22px;font-size:14.5px;width:100%}
  .btn-sm{width:auto}
  .price-num{font-size:28px}
  .value-num{font-size:34px}
  .logo-text{font-size:16.5px}
  .stat-num{font-size:32px}
  .faq-a-inner{padding-right:12px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --brand-900:#0A2E2A;--brand-700:#10514A;--brand-600:#14655C;--brand-500:#1F8074;
  --brand-300:#8FC9C0;--brand-050:#ECF5F2;
  --accent-600:#D95A33;--accent-500:#F0764C;--accent-200:#FFD9CB;
  --ink-900:#16211F;--ink-700:#33403D;--ink-500:#5C6B67;--ink-300:#9AA7A3;
  --line:#E3E8E6;--bg:#F7F6F2;--bg-alt:#EFF3F1;--surface:#FFFFFF;--dark:#0B2724;
  --danger:#C8452F;--success:#2E7D5B;--warning:#B7791F;
  --radius-card:16px;--radius-img:12px;--radius-pill:999px;
  --shadow-sm:0 1px 2px rgba(10,46,42,.06);
  --shadow-md:0 8px 24px rgba(10,46,42,.10);
  --shadow-lg:0 20px 48px rgba(10,46,42,.14);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --font-num:"Inter","Barlow","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink-900);
  font-family:var(--font-cn);font-size:17px;line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand-600);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--accent-600)}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--ink-900);letter-spacing:-.2px}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0 0 1.1em;padding-left:1.3em}
li{margin-bottom:8px}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
:focus-visible{outline:2px solid var(--accent-500);outline-offset:2px;border-radius:6px}
::selection{background:var(--accent-200);color:var(--brand-900)}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums}

/* ---------- 悬浮胶囊导航 ---------- */
.site-header{position:fixed;top:16px;left:0;right:0;z-index:60;display:flex;justify-content:center;pointer-events:none}
.nav-shell{
  pointer-events:auto;width:min(1120px,calc(100% - 32px));height:64px;
  display:flex;align-items:center;gap:24px;padding:0 18px 0 22px;
  background:rgba(255,255,255,.82);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);border-radius:var(--radius-pill);box-shadow:var(--shadow-sm);
  transition:height .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
}
.site-header.is-scrolled .nav-shell{height:56px;background:#fff;box-shadow:var(--shadow-md)}
.logo{display:flex;align-items:center;gap:10px;color:var(--brand-700);flex:0 0 auto}
.logo:hover{color:var(--brand-600)}
.logo-mark{color:var(--brand-600);display:flex}
.logo-text{font-size:18px;font-weight:700;letter-spacing:.4px;white-space:nowrap}
.nav-panel{display:flex;align-items:center;gap:24px;flex:1 1 auto;justify-content:space-between}
.nav-links{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}
.nav-links li{margin:0}
.nav-link{
  display:inline-block;padding:8px 14px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:500;color:var(--ink-700);position:relative;white-space:nowrap;
}
.nav-link:hover{color:var(--brand-600);background:var(--brand-050)}
.nav-link.is-active{color:var(--brand-600)}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--brand-600);border-radius:2px;
}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{display:none;width:44px;height:44px;border-radius:12px;flex-direction:column;justify-content:center;gap:5px;align-items:center}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--brand-700);border-radius:2px;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:var(--radius-pill);font-size:15px;font-weight:600;
  border:1.5px solid transparent;transition:transform .18s var(--ease),background .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
  white-space:nowrap;
}
.btn-sm{padding:10px 20px;font-size:14px}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:var(--shadow-sm)}
.btn-primary:hover{background:var(--brand-700);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-md)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--shadow-sm)}
.btn-light{background:#fff;color:var(--brand-700);box-shadow:var(--shadow-sm)}
.btn-light:hover{background:var(--brand-050);color:var(--brand-700);transform:translateY(-2px);box-shadow:var(--shadow-md)}
.btn-outline{background:transparent;border-color:var(--brand-600);color:var(--brand-600)}
.btn-outline:hover{background:rgba(20,101,92,.08);color:var(--brand-700);transform:translateY(-2px)}
.btn-text{padding:6px 0;color:var(--brand-600);font-weight:600;border-radius:0}
.btn-text .underline{display:block;height:1px;background:currentColor;width:100%;position:relative;margin-top:2px}
.btn-text .underline::after{content:"";position:absolute;inset:0;background:var(--accent-600);transform:scaleX(0);transform-origin:left;transition:transform .18s var(--ease)}
.btn-text:hover{color:var(--accent-600)}
.btn-text:hover .underline::after{transform:scaleX(1)}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none!important;box-shadow:none}
.btn.is-loading{pointer-events:none;opacity:.8}
.spinner{width:16px;height:16px;border:2px solid rgba(255,255,255,.4);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:var(--radius-pill);
  font-size:12.5px;font-weight:600;letter-spacing:.3px;
  background:var(--brand-050);color:var(--brand-700);
}
.badge-accent{background:var(--accent-200);color:var(--accent-600)}
.badge-soft{background:var(--bg-alt);color:var(--ink-500);font-weight:500}

/* ---------- 面包屑 ---------- */
.crumb-bar{background:var(--bg-alt);border-bottom:1px solid var(--line)}
.crumb-inner{display:flex;align-items:center;gap:8px;padding:12px 0;font-size:13px;color:var(--ink-500);flex-wrap:wrap}
.crumb-inner a{color:var(--ink-500)}
.crumb-inner a:hover{color:var(--brand-600)}
.crumb-inner .sep{color:var(--ink-300)}
.crumb-current{color:var(--ink-700);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 文章头 ---------- */
.article-main{padding:112px 0 0}
.article-head{padding:40px 0 28px}
.article-head .badge{margin-bottom:18px}
.article-head h1{font-size:38px;line-height:1.3;letter-spacing:-.5px;max-width:20ch}
.article-lede{
  margin-top:18px;font-size:18px;line-height:1.8;color:var(--ink-700);
  border-left:4px solid var(--brand-600);padding-left:18px;max-width:62ch;
}
.article-meta{
  display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:22px;
  font-size:13px;color:var(--ink-500);padding-bottom:22px;border-bottom:1px solid var(--line);
}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--ink-300)}

/* ---------- 阅读布局 ---------- */
.article-layout{display:grid;grid-template-columns:minmax(0,780px) 220px;gap:56px;justify-content:center;padding:44px 0 8px}
.article-body{font-size:17.5px;line-height:1.9;color:var(--ink-900);min-width:0}
.article-body p{margin:0 0 1.2em;text-align:left}
.article-body h2{
  font-size:26px;line-height:1.35;margin:48px 0 18px;padding-left:16px;position:relative;scroll-margin-top:110px;
}
.article-body h2::before{content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:4px;border-radius:2px;background:var(--brand-600)}
.article-body h3{font-size:20px;line-height:1.4;margin:32px 0 14px;scroll-margin-top:110px}
.article-body ul,.article-body ol{padding-left:1.35em;margin:0 0 1.2em}
.article-body ul{list-style:none;padding-left:0}
.article-body ul li{position:relative;padding-left:22px}
.article-body ul li::before{content:"";position:absolute;left:2px;top:.72em;width:8px;height:8px;background:var(--brand-300);border-radius:2px}
.article-body ol li::marker{color:var(--brand-600);font-weight:600}
.article-body blockquote{
  margin:24px 0;padding:20px 24px;background:var(--brand-050);
  border-left:4px solid var(--brand-500);border-radius:0 12px 12px 0;color:var(--ink-700);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--radius-img);margin:26px auto;box-shadow:var(--shadow-sm)}
.article-body figure{margin:26px 0}
.article-body figcaption{font-size:13px;color:var(--ink-500);text-align:center;margin-top:10px}
.article-body table{width:100%;border-collapse:collapse;font-size:15.5px}
.article-body .table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius-card);margin:26px 0;background:var(--surface)}
.article-body thead th{background:var(--brand-050);color:var(--brand-700);font-weight:600;text-align:left}
.article-body th,.article-body td{padding:12px 16px;border-bottom:1px solid var(--line);white-space:nowrap}
.article-body tbody tr:nth-child(even){background:var(--bg-alt)}
.article-body tbody tr:last-child td{border-bottom:0}
.article-body pre{
  background:var(--dark);color:#EAF3F0;padding:20px;border-radius:var(--radius-img);
  overflow-x:auto;font-size:14px;line-height:1.7;margin:24px 0;
}
.article-body code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.92em;background:var(--bg-alt);padding:2px 6px;border-radius:4px}
.article-body pre code{background:none;padding:0;color:inherit}
.article-body a{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--accent-600)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0}

/* 目录 */
.article-toc{position:sticky;top:104px;align-self:start}
.article-toc h4{font-size:13px;letter-spacing:1px;color:var(--ink-500);text-transform:uppercase;margin-bottom:14px;font-weight:600}
.article-toc ol{list-style:none;margin:0;padding:0;border-left:1px solid var(--line)}
.article-toc li{margin:0}
.article-toc a{display:block;padding:7px 0 7px 14px;font-size:14px;color:var(--ink-500);line-height:1.6;border-left:2px solid transparent;margin-left:-1px}
.article-toc a:hover{color:var(--brand-600)}
.article-toc a.is-current{color:var(--brand-600);font-weight:600;border-left-color:var(--brand-600)}

/* ---------- 空态 ---------- */
.empty-state{
  min-height:240px;border:1px dashed var(--line);border-radius:var(--radius-card);background:var(--surface);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;text-align:center;padding:40px 24px;
}
.empty-state .ico{color:rgba(20,101,92,.3)}
.empty-state .t{font-size:16px;font-weight:600}
.empty-state .s{font-size:14px;color:var(--ink-500);margin:0}

/* ---------- 文章尾 ---------- */
.article-foot{padding:56px 0 0}
.tag-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding-top:28px;border-top:1px solid var(--line)}
.share-row{display:flex;align-items:center;gap:12px;margin-top:24px}
.share-row .lbl{font-size:13px;color:var(--ink-500)}
.icon-btn{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:var(--surface);
  display:inline-flex;align-items:center;justify-content:center;color:var(--brand-600);
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease),color .18s var(--ease);
}
.icon-btn:hover{transform:translateY(-2px);border-color:var(--brand-300);box-shadow:var(--shadow-md);color:var(--accent-600)}
.pager{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:40px}
.pager a{
  display:block;padding:22px 24px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);box-shadow:var(--shadow-sm);color:var(--ink-900);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.pager a:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--brand-300);color:var(--ink-900)}
.pager .k{font-size:12.5px;color:var(--ink-500);letter-spacing:.5px}
.pager .v{font-size:17px;font-weight:600;margin-top:8px;line-height:1.5}
.pager .right{text-align:right}

/* ---------- 相关推荐 ---------- */
.section{padding:96px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:34px;flex-wrap:wrap}
.section-head h2{font-size:30px;line-height:1.25}
.section-head .sub{font-size:14px;color:var(--ink-500);margin:10px 0 0}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);overflow:hidden;display:flex;flex-direction:column;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--brand-300)}
.card-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--bg-alt)}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease);box-shadow:inset 0 0 0 1px rgba(10,46,42,.06)}
.card:hover .card-thumb img{transform:scale(1.03)}
.card-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:12px;flex:1}
.card-body h3{font-size:18px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-body p{font-size:14.5px;color:var(--ink-500);line-height:1.75;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--ink-500);margin-top:auto;padding-top:8px;border-top:1px solid var(--line)}
.card-meta a{font-weight:600}

/* ---------- CTA 条 ---------- */
.cta-strip{
  background:var(--brand-700);border-radius:20px;padding:36px 40px;color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  box-shadow:var(--shadow-md);
}
.cta-strip h3{color:#fff;font-size:22px;line-height:1.4}
.cta-strip p{color:rgba(255,255,255,.82);font-size:15px;margin:8px 0 0;max-width:56ch}
.cta-band{
  position:relative;border-radius:20px;overflow:hidden;padding:56px 48px;color:#fff;
  background-image:url(/assets/images/backpic/back-2.png);background-size:cover;background-position:center;
}
.cta-band::before{content:"";position:absolute;inset:0;background:rgba(10,46,42,.72)}
.cta-band-inner{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.cta-band h2{color:#fff;font-size:28px;line-height:1.3}
.cta-band p{color:rgba(255,255,255,.85);font-size:16px;margin:10px 0 0;max-width:58ch}
.cta-band .links{font-size:14px;color:rgba(255,255,255,.8);display:flex;gap:20px;flex-wrap:wrap;margin-top:14px}
.cta-band .links a{color:rgba(255,255,255,.9);text-decoration:underline;text-underline-offset:3px}
.cta-band .links a:hover{color:var(--accent-200)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.88);margin-top:96px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding:72px 0 48px}
.site-footer h4{color:#fff;font-size:15px;letter-spacing:.5px;margin-bottom:18px}
.site-footer p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.64);margin:0 0 12px}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin-bottom:10px}
.site-footer a{color:rgba(255,255,255,.88);font-size:14.5px}
.site-footer a:hover{color:var(--accent-500);text-decoration:underline;text-underline-offset:3px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;margin-bottom:16px}
.footer-brand .logo-mark{color:var(--brand-300)}
.footer-brand .logo-text{font-size:18px;font-weight:700}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:22px 0 28px;
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:13.5px;color:rgba(255,255,255,.6);
}
.footer-bottom a{color:rgba(255,255,255,.7)}
.to-top{
  position:fixed;right:24px;bottom:28px;width:48px;height:48px;border-radius:50%;
  background:var(--surface);border:1px solid var(--line);color:var(--brand-700);
  display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-md);
  opacity:0;visibility:hidden;transform:translateY(10px);z-index:50;
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s var(--ease),color .18s var(--ease);
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{color:var(--accent-600);transform:translateY(-2px)}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px)}
.reveal.is-in{opacity:1;transform:none;transition:opacity .5s var(--ease),transform .5s var(--ease)}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0}
  .article-toc{display:none}
  .grid-3{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1023px){
  .container{padding:0 24px}
  .nav-toggle{display:flex}
  .nav-shell{height:60px;padding:0 12px 0 18px}
  .nav-panel{
    position:fixed;top:88px;left:16px;right:16px;background:#fff;border:1px solid var(--line);
    border-radius:0 0 20px 20px;box-shadow:var(--shadow-lg);flex-direction:column;align-items:stretch;
    gap:8px;padding:18px;display:none;
  }
  .nav-panel.is-open{display:flex}
  .nav-links{flex-direction:column;align-items:stretch;gap:2px}
  .nav-link{padding:12px 14px;font-size:16px}
  .nav-link.is-active::after{display:none}
  .nav-link.is-active{background:var(--brand-050)}
  .nav-actions .btn{width:100%}
  .article-head h1{font-size:30px}
  .section{padding:72px 0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:56px 0 36px}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 20px}
  .article-main{padding-top:100px}
  .article-head{padding:28px 0 20px}
  .article-head h1{font-size:26px}
  .article-lede{font-size:16px;padding-left:14px}
  .article-body{font-size:16.5px;line-height:1.85}
  .article-body h2{font-size:22px;margin-top:38px}
  .article-body h3{font-size:18px;margin-top:26px}
  .grid-3{grid-template-columns:1fr}
  .pager{grid-template-columns:1fr}
  .pager .right{text-align:left}
  .section{padding:56px 0}
  .section-head h2{font-size:24px}
  .cta-strip{padding:28px 24px}
  .cta-band{padding:36px 24px}
  .cta-band h2{font-size:22px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .site-footer{margin-top:64px}
  .to-top{right:16px;bottom:20px}
}
@media (max-width:480px){
  .article-head h1{font-size:23px}
  .btn{padding:12px 20px}
  .cta-strip .btn,.cta-band .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category1 */
/* ============ 设计变量 ============ */
:root{
  --brand-900:#0A2E2A;
  --brand-700:#10514A;
  --brand-600:#14655C;
  --brand-500:#1F8074;
  --brand-300:#8FC9C0;
  --brand-050:#ECF5F2;
  --accent-600:#D95A33;
  --accent-500:#F0764C;
  --accent-200:#FFD9CB;
  --ink-900:#16211F;
  --ink-700:#33403D;
  --ink-500:#5C6B67;
  --ink-300:#9AA7A3;
  --line:#E3E8E6;
  --bg:#F7F6F2;
  --bg-alt:#EFF3F1;
  --surface:#FFFFFF;
  --dark:#0B2724;
  --danger:#C8452F;
  --success:#2E7D5B;
  --warning:#B7791F;

  --radius-card:16px;
  --radius-img:12px;
  --radius-btn:999px;
  --shadow-sm:0 1px 2px rgba(10,46,42,.06);
  --shadow-md:0 8px 24px rgba(10,46,42,.10);
  --shadow-lg:0 20px 48px rgba(10,46,42,.14);

  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Inter","Barlow",-apple-system,"Segoe UI",system-ui,sans-serif;

  --ease:cubic-bezier(.2,.7,.3,1);
  --t:180ms var(--ease);
}

/* ============ 基础 reset ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.85;
  color:var(--ink-900);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;}
ul,ol{padding:0;list-style:none;}
img{max-width:100%;display:block;background:var(--bg-alt);}
a{color:var(--brand-600);text-decoration:none;}
a:hover{color:var(--accent-600);}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input{font-family:inherit;}
:focus-visible{outline:2px solid var(--accent-500);outline-offset:2px;border-radius:4px;}
h1{font-size:56px;line-height:1.15;letter-spacing:-.5px;font-weight:700;}
h2{font-size:38px;line-height:1.25;font-weight:700;letter-spacing:-.3px;}
h3{font-size:24px;line-height:1.35;font-weight:700;}
h4{font-size:19px;line-height:1.45;font-weight:600;}
p{color:var(--ink-700);}
p + p{margin-top:1.1em;}

/* ============ 容器与分区 ============ */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}
.section{padding:96px 0;}
.section-alt{background:var(--bg-alt);}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:32px;}
.section-head p{font-size:14px;color:var(--ink-500);max-width:520px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.3px;
  color:var(--brand-600);
  background:var(--brand-050);
  border-radius:999px;
  padding:6px 14px;
  margin-bottom:18px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent-500);}

/* ============ 悬浮胶囊导航 ============ */
.site-header{
  position:fixed;top:16px;left:0;right:0;z-index:900;
  padding:0 16px;
  pointer-events:none;
}
.nav-shell{
  position:relative;
  pointer-events:auto;
  width:min(1120px,100%);
  margin:0 auto;
  min-height:64px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:0 14px 0 20px;
  background:rgba(255,255,255,.82);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border:1px solid var(--line);
  border-radius:999px;
  box-shadow:var(--shadow-sm);
  transition:min-height 200ms var(--ease),background 200ms var(--ease),box-shadow 200ms var(--ease),border-color 200ms var(--ease);
}
.site-header.is-scrolled .nav-shell{
  min-height:56px;
  background:#fff;
  box-shadow:var(--shadow-md);
}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--brand-700);flex:0 0 auto;}
.logo:hover{color:var(--brand-600);}
.logo-mark{display:inline-flex;color:var(--brand-600);}
.logo-text{font-size:19px;font-weight:700;letter-spacing:.2px;color:inherit;white-space:nowrap;}
.nav-panel{
  display:flex;flex:1;align-items:center;justify-content:space-between;gap:22px;
}
.nav-links{display:flex;align-items:center;gap:4px;}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 14px;
  font-size:15px;font-weight:500;
  color:var(--ink-700);
  border-radius:999px;
  transition:color var(--t),background var(--t);
}
.nav-link:hover{color:var(--brand-700);background:var(--brand-050);}
.nav-link.is-active{color:var(--brand-600);font-weight:600;}
.nav-link.is-active::after{
  content:"";position:absolute;left:50%;bottom:0;transform:translateX(-50%);
  width:20px;height:2px;border-radius:2px;background:var(--brand-600);
}
.nav-actions{display:flex;align-items:center;gap:10px;}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;border-radius:999px;
  border:1px solid var(--line);background:#fff;
}
.nav-toggle span{display:block;width:18px;height:2px;margin:0 auto;background:var(--brand-700);border-radius:2px;transition:transform var(--t),opacity var(--t);}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ============ 按钮体系 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-weight:600;font-size:16px;line-height:1;
  padding:14px 28px;
  border-radius:var(--radius-btn);
  border:1.5px solid transparent;
  transition:transform var(--t),box-shadow var(--t),background var(--t),color var(--t),border-color var(--t),opacity var(--t);
  white-space:nowrap;
}
.btn-sm{padding:11px 20px;font-size:14px;}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:var(--shadow-sm);}
.btn-primary:hover{background:var(--brand-700);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-md);}
.btn-primary:active{transform:translateY(0);box-shadow:var(--shadow-sm);}
.btn-ghost{background:transparent;color:var(--brand-700);border-color:var(--brand-600);}
.btn-ghost:hover{background:var(--brand-050);color:var(--brand-700);transform:translateY(-2px);box-shadow:var(--shadow-sm);}
.btn-light{background:#fff;color:var(--brand-700);}
.btn-light:hover{background:#fff;color:var(--brand-900);transform:translateY(-2px);box-shadow:var(--shadow-md);}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.6);}
.btn-outline-light:hover{background:rgba(255,255,255,.14);color:#fff;transform:translateY(-2px);}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}
.btn-text{
  display:inline-block;color:var(--brand-600);font-weight:600;font-size:15px;
  background-image:linear-gradient(currentColor,currentColor);
  background-repeat:no-repeat;background-position:0 100%;background-size:0 1.5px;
  transition:background-size 180ms var(--ease),color var(--t);
  padding-bottom:2px;
}
.btn-text:hover{background-size:100% 1.5px;color:var(--accent-600);}

/* ============ 徽章 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.3px;
  background:var(--brand-050);color:var(--brand-600);
}
.badge-accent{background:var(--accent-200);color:var(--accent-600);}
.badge-on-dark{background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.28);}

/* ============ 页面顶部 / 面包屑 ============ */
.page-top{padding-top:104px;}
.crumb-bar{padding-bottom:18px;}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-500);}
.crumbs li{display:flex;align-items:center;gap:8px;}
.crumbs li + li::before{content:"/";color:var(--ink-300);}
.crumbs a{color:var(--ink-500);}
.crumbs a:hover{color:var(--brand-600);}
.crumbs [aria-current="page"]{color:var(--ink-700);font-weight:600;}

/* ============ 横幅页头 ============ */
.hero-banner{
  position:relative;overflow:hidden;
  border-radius:20px;
  min-height:400px;
  display:flex;align-items:flex-end;
  border:1px solid rgba(10,46,42,.16);
  box-shadow:var(--shadow-md);
}
.banner-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;}
.banner-mask{position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,46,42,.36) 0%,rgba(10,46,42,.62) 62%,rgba(10,46,42,.78) 100%);}
.banner-inner{position:relative;z-index:2;padding:44px 44px 40px;max-width:760px;color:#fff;}
.banner-inner h1{color:#fff;font-size:48px;margin:16px 0 14px;}
.banner-sub{color:rgba(255,255,255,.92);font-size:18px;line-height:1.7;max-width:600px;}
.banner-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.banner-facts{
  position:relative;z-index:2;
  display:flex;flex-wrap:wrap;gap:20px;
  margin-top:26px;padding-top:20px;
  border-top:1px solid rgba(255,255,255,.24);
  color:rgba(255,255,255,.9);
  font-size:14px;
}
.banner-facts b{display:block;font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:26px;font-weight:700;color:#fff;line-height:1.2;}
.banner-facts span{font-size:12.5px;letter-spacing:.3px;color:rgba(255,255,255,.78);}

/* ============ 粘性锚点胶囊条 ============ */
.anchor-wrap{position:sticky;top:84px;z-index:600;padding:22px 0 8px;background:linear-gradient(180deg,var(--bg) 62%,rgba(247,246,242,0));}
.anchor-bar{
  display:flex;gap:8px;overflow-x:auto;
  padding:8px;
  background:rgba(255,255,255,.9);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border:1px solid var(--line);
  border-radius:999px;
  box-shadow:var(--shadow-sm);
  scrollbar-width:none;
}
.anchor-bar::-webkit-scrollbar{display:none;}
.anchor-link{
  flex:0 0 auto;
  padding:9px 18px;border-radius:999px;
  font-size:14px;font-weight:500;color:var(--ink-700);
  transition:background var(--t),color var(--t);
}
.anchor-link:hover{background:var(--brand-050);color:var(--brand-700);}
.anchor-link.is-current{background:var(--brand-600);color:#fff;font-weight:600;}

/* ============ 两栏主体 ============ */
.split-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr) 372px;
  gap:56px;
  align-items:start;
}
.chapter{padding:34px 0;border-bottom:1px solid var(--line);}
.chapter:first-child{padding-top:8px;}
.chapter:last-child{border-bottom:0;}
.chapter h2{
  position:relative;
  padding-left:18px;
  font-size:30px;
  margin-bottom:18px;
  scroll-margin-top:140px;
}
.chapter h2::before{
  content:"";position:absolute;left:0;top:.18em;
  width:4px;height:1.05em;border-radius:2px;background:var(--brand-600);
}
.chapter h4{margin:22px 0 10px;color:var(--ink-900);}
.dot-list{margin-top:14px;display:grid;gap:10px;}
.dot-list li{position:relative;padding-left:20px;font-size:16px;color:var(--ink-700);}
.dot-list li::before{
  content:"";position:absolute;left:0;top:.72em;
  width:7px;height:7px;border-radius:2px;background:var(--brand-500);
}
.note{
  margin-top:22px;
  background:var(--brand-050);
  border-left:4px solid var(--brand-500);
  border-radius:0 12px 12px 0;
  padding:18px 20px;
  font-size:15px;color:var(--brand-900);
}

/* ============ 右侧粘性图文卡 ============ */
.sticky-card{
  position:sticky;top:150px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);
  padding:24px;
  transition:box-shadow var(--t),border-color var(--t);
}
.sticky-card:hover{box-shadow:var(--shadow-md);border-color:var(--brand-300);}
.sticky-card img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--radius-img);box-shadow:inset 0 0 0 1px rgba(10,46,42,.08);}
.sticky-card h3{font-size:20px;margin:18px 0 10px;}
.sticky-card .dot-list li{font-size:14.5px;}
.sticky-card .btn{width:100%;margin-top:20px;}
.card-meta{margin-top:14px;font-size:13px;color:var(--ink-500);display:flex;align-items:center;gap:8px;}
.card-meta i{width:6px;height:6px;border-radius:50%;background:var(--accent-500);display:inline-block;}

/* ============ 时间轴 ============ */
.timeline{border-top:1px solid var(--line);margin-top:8px;}
.tl-item{
  display:grid;
  grid-template-columns:64px minmax(0,1fr) auto;
  align-items:center;
  gap:22px;
  padding:22px 18px;
  border-bottom:1px solid var(--line);
  transition:background var(--t),transform var(--t);
}
.tl-item:hover{background:var(--brand-050);transform:translateX(2px);}
.tl-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:52px;height:52px;border-radius:14px;
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:20px;font-weight:700;
  background:var(--brand-050);color:var(--brand-600);
  border:1px solid var(--brand-300);
}
.tl-item:hover .tl-num{background:var(--brand-600);color:#fff;border-color:var(--brand-600);}
.tl-body h3{font-size:19px;margin-bottom:4px;}
.tl-body p{font-size:15px;color:var(--ink-500);}
.tl-tag{
  font-size:12.5px;font-weight:600;letter-spacing:.3px;
  color:var(--brand-600);background:var(--brand-050);
  border-radius:999px;padding:5px 12px;white-space:nowrap;
}

/* ============ 问答（静态两列） ============ */
.qa-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.qa-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:26px 28px;
  box-shadow:var(--shadow-sm);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.qa-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--brand-300);}
.qa-card h3{font-size:18px;margin-bottom:10px;display:flex;gap:10px;align-items:flex-start;}
.qa-card h3::before{
  content:"Q";flex:0 0 auto;
  font-family:var(--font-num);font-size:13px;font-weight:700;color:#fff;
  background:var(--brand-600);border-radius:8px;
  width:24px;height:24px;display:inline-flex;align-items:center;justify-content:center;
  margin-top:4px;
}
.qa-card p{font-size:15.5px;color:var(--ink-700);padding-left:34px;}

/* ============ 横向 CTA 条 ============ */
.cta-strip{
  background:var(--brand-700);
  border-radius:20px;
  padding:36px 40px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:22px;
  box-shadow:var(--shadow-lg);
}
.cta-strip h2{color:#fff;font-size:28px;max-width:620px;}
.cta-strip p{color:rgba(255,255,255,.82);font-size:15.5px;margin-top:8px;max-width:620px;}
.cta-strip .btn{flex:0 0 auto;}

/* ============ 互链卡片 ============ */
.link-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.link-card{
  display:block;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:26px;
  box-shadow:var(--shadow-sm);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.link-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--brand-300);}
.link-card h3{font-size:19px;color:var(--ink-900);margin:14px 0 8px;}
.link-card p{font-size:15px;color:var(--ink-500);}
.link-card .btn-text{margin-top:16px;}

/* ============ 页脚 ============ */
.site-footer{background:var(--dark);color:rgba(255,255,255,.88);margin-top:96px;padding:72px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand .logo{color:#fff;}
.footer-brand .logo-mark{color:var(--brand-300);}
.footer-brand p{margin-top:18px;font-size:14.5px;line-height:1.85;color:rgba(255,255,255,.68);max-width:320px;}
.footer-title{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-list{display:grid;gap:11px;}
.footer-list a{font-size:14.5px;color:rgba(255,255,255,.72);transition:color var(--t);}
.footer-list a:hover{color:var(--accent-500);text-decoration:underline;text-underline-offset:3px;}
.footer-contact li{font-size:14.5px;color:rgba(255,255,255,.72);margin-bottom:11px;}
.footer-contact b{color:rgba(255,255,255,.92);font-weight:600;}
.footer-bottom{
  margin-top:56px;padding:22px 0;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:rgba(255,255,255,.58);
}
.footer-bottom a{color:rgba(255,255,255,.58);}
.footer-bottom a:hover{color:var(--accent-500);}

/* ============ 浮动 CTA ============ */
.float-stack{
  position:fixed;right:24px;bottom:28px;z-index:800;
  display:flex;flex-direction:column;align-items:flex-end;gap:12px;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity 220ms var(--ease),transform 220ms var(--ease),visibility 220ms var(--ease);
}
.float-stack.is-show{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--accent-500);color:#fff;
  font-weight:600;font-size:15px;
  padding:14px 24px;border-radius:999px;
  box-shadow:var(--shadow-lg);
  transition:background var(--t),transform var(--t),box-shadow var(--t);
}
.float-cta:hover{background:var(--accent-600);color:#fff;transform:translateY(-2px);}
.float-top{
  width:46px;height:46px;border-radius:50%;
  background:#fff;border:1px solid var(--line);color:var(--brand-700);
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-md);
  transition:transform var(--t),box-shadow var(--t),color var(--t);
}
.float-top:hover{color:var(--accent-600);transform:translateY(-2px);box-shadow:var(--shadow-lg);}

/* ============ 入场动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 520ms var(--ease),transform 520ms var(--ease);}
.reveal.is-visible{opacity:1;transform:none;}

/* ============ 响应式 ============ */
@media (max-width:1439px){
  .container{max-width:1200px;}
}
@media (max-width:1199px){
  .split-grid{grid-template-columns:minmax(0,1fr) 320px;gap:40px;}
  .link-cards{grid-template-columns:repeat(2,minmax(0,1fr));}
  .banner-inner h1{font-size:42px;}
}
@media (max-width:1023px){
  body{font-size:16px;}
  h1{font-size:34px;}
  h2{font-size:26px;}
  h3{font-size:20px;}
  .nav-toggle{display:flex;}
  .nav-panel{
    position:absolute;top:calc(100% + 10px);left:0;right:0;
    flex-direction:column;align-items:stretch;justify-content:flex-start;
    gap:6px;
    background:#fff;
    border:1px solid var(--line);
    border-radius:0 0 20px 20px;
    box-shadow:var(--shadow-lg);
    padding:16px 18px 22px;
    max-height:calc(100vh - 120px);
    overflow-y:auto;
  }
  .nav-panel:not(.is-open){display:none;}
  .nav-links{flex-direction:column;align-items:stretch;gap:2px;}
  .nav-link{padding:14px 12px;border-radius:12px;font-size:16px;}
  .nav-link.is-active::after{display:none;}
  .nav-link.is-active{background:var(--brand-050);}
  .nav-actions{margin-top:10px;}
  .nav-actions .btn{width:100%;}
  .split-grid{grid-template-columns:minmax(0,1fr);gap:36px;}
  .sticky-card{position:static;top:auto;}
  .anchor-wrap{top:76px;}
  .section{padding:72px 0;}
  .qa-grid{grid-template-columns:minmax(0,1fr);}
  .link-cards{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-strip{padding:30px 26px;}
  .banner-inner{padding:32px;max-width:100%;}
  .banner-inner h1{font-size:34px;}
}
@media (max-width:767px){
  body{font-size:16px;line-height:1.8;}
  .container{padding:0 20px;}
  .site-header{padding:0 12px;top:12px;}
  .nav-shell{padding:0 10px 0 14px;}
  .logo-text{font-size:17px;}
  .page-top{padding-top:92px;}
  .section{padding:56px 0;}
  .hero-banner{min-height:0;border-radius:16px;}
  .banner-inner{padding:26px 20px 24px;}
  .banner-inner h1{font-size:27px;line-height:1.25;margin:12px 0 10px;}
  .banner-sub{font-size:15.5px;}
  .banner-actions{margin-top:20px;gap:10px;}
  .banner-actions .btn{width:100%;}
  .banner-facts{gap:16px;margin-top:20px;}
  .banner-facts b{font-size:21px;}
  .anchor-wrap{top:74px;padding:16px 0 6px;}
  .anchor-link{padding:8px 15px;font-size:13.5px;}
  .chapter h2{font-size:22px;padding-left:14px;margin-bottom:14px;}
  .tl-item{grid-template-columns:48px minmax(0,1fr);gap:14px;padding:18px 10px;}
  .tl-num{width:44px;height:44px;font-size:17px;}
  .tl-tag{grid-column:2;justify-self:start;margin-top:4px;}
  .qa-card{padding:22px 20px;}
  .qa-card p{padding-left:0;}
  .cta-strip{border-radius:16px;padding:26px 20px;}
  .cta-strip h2{font-size:22px;}
  .cta-strip .btn{width:100%;}
  .site-footer{margin-top:64px;padding-top:56px;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-bottom{margin-top:40px;flex-direction:column;align-items:flex-start;}
  .float-stack{
    left:0;right:0;bottom:0;
    flex-direction:row;align-items:stretch;
    padding:10px 16px calc(10px + env(safe-area-inset-bottom));
    background:rgba(255,255,255,.94);
    -webkit-backdrop-filter:blur(12px);
    backdrop-filter:blur(12px);
    border-top:1px solid var(--line);
    gap:0;
  }
  .float-cta{flex:1;justify-content:center;border-radius:999px;}
  .float-top{display:none;}
  .site-footer{padding-bottom:72px;}
}
@media (max-width:480px){
  h1{font-size:25px;}
  h2{font-size:20px;}
  .btn{padding:13px 22px;font-size:15px;}
  .btn-sm{padding:10px 16px;font-size:13.5px;}
  .logo-text{font-size:16px;}
  .chapter p{font-size:15.5px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category2 */
:root{
    --brand-900:#0A2E2A;
    --brand-700:#10514A;
    --brand-600:#14655C;
    --brand-500:#1F8074;
    --brand-300:#8FC9C0;
    --brand-050:#ECF5F2;
    --accent-600:#D95A33;
    --accent-500:#F0764C;
    --accent-200:#FFD9CB;
    --ink-900:#16211F;
    --ink-700:#33403D;
    --ink-500:#5C6B67;
    --ink-300:#9AA7A3;
    --line:#E3E8E6;
    --bg:#F7F6F2;
    --bg-alt:#EFF3F1;
    --surface:#FFFFFF;
    --dark:#0B2724;
    --danger:#C8452F;
    --success:#2E7D5B;
    --warning:#B7791F;
    --radius-card:16px;
    --radius-img:12px;
    --radius-pill:999px;
    --shadow-sm:0 1px 2px rgba(10,46,42,.06);
    --shadow-md:0 8px 24px rgba(10,46,42,.10);
    --shadow-lg:0 20px 48px rgba(10,46,42,.14);
    --ease:cubic-bezier(.2,.7,.3,1);
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:120px}
  body{
    margin:0;
    background:var(--bg);
    color:var(--ink-900);
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
    font-size:17px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  img{display:block;max-width:100%;height:auto}
  a{color:inherit;text-decoration:none}
  button,input,textarea,select{font:inherit;color:inherit}
  ul,ol{margin:0;padding:0;list-style:none}
  p{margin:0 0 1.1em}
  p:last-child{margin-bottom:0}
  :focus-visible{outline:2px solid var(--accent-500);outline-offset:2px;border-radius:4px}
  .num{font-variant-numeric:tabular-nums;letter-spacing:-.5px}

  /* 容器与分区 */
  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
  .section{padding:96px 0}
  .section-alt{background:var(--bg-alt)}
  .section-surface{background:var(--surface)}
  .section-dark{background:var(--dark);color:#fff}
  .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:32px}
  .section-head .eyebrow{display:block;font-size:13px;letter-spacing:.3px;font-weight:600;color:var(--accent-600);margin-bottom:10px}
  .section-title{font-size:38px;line-height:1.25;font-weight:700;margin:0;letter-spacing:-.5px}
  .section-sub{font-size:15px;color:var(--ink-500);max-width:440px;margin:0}
  .section-dark .section-title{color:#fff}
  .section-dark .section-sub{color:rgba(255,255,255,.68)}
  .divider{height:1px;background:var(--line);border:0;margin:0}

  /* 悬浮胶囊导航 */
  .site-header{position:fixed;top:16px;left:0;right:0;z-index:900;display:flex;justify-content:center;padding:0 16px;pointer-events:none}
  .nav-shell{
    position:relative;z-index:2;
    width:min(1120px,100%);height:64px;display:flex;align-items:center;gap:20px;
    padding:0 12px 0 20px;
    background:rgba(255,255,255,.82);
    -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
    border:1px solid var(--line);border-radius:var(--radius-pill);
    box-shadow:var(--shadow-sm);transition:height 200ms var(--ease),box-shadow 200ms var(--ease),background-color 200ms var(--ease);
    pointer-events:auto;
  }
  .site-header.is-scrolled .nav-shell{height:56px;background:#fff;box-shadow:var(--shadow-md)}
  .logo{display:inline-flex;align-items:center;gap:10px;color:var(--brand-700);font-weight:700;flex-shrink:0}
  .logo-mark{display:inline-flex;color:var(--brand-600);line-height:0}
  .logo-text{font-size:18px;letter-spacing:.5px}
  .nav-panel{display:flex;align-items:center;gap:16px;margin-left:auto}
  .nav-links{display:flex;align-items:center;gap:4px}
  .nav-link{position:relative;display:inline-flex;align-items:center;height:38px;padding:0 14px;border-radius:var(--radius-pill);font-size:15px;font-weight:500;color:var(--ink-700);transition:color 180ms var(--ease),background-color 180ms var(--ease)}
  .nav-link:hover{color:var(--brand-600);background:var(--brand-050)}
  .nav-link.is-active{color:var(--brand-600);font-weight:600}
  .nav-link.is-active::after{content:"";position:absolute;left:50%;bottom:3px;transform:translateX(-50%);width:18px;height:2px;border-radius:2px;background:var(--brand-600)}
  .nav-actions{display:flex;align-items:center;gap:10px}
  .nav-toggle{display:none;margin-left:auto;width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:14px;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px;transition:box-shadow 180ms var(--ease),border-color 180ms var(--ease)}
  .nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--brand-700);transition:transform 200ms var(--ease),opacity 200ms var(--ease)}
  .nav-toggle:hover{border-color:var(--brand-300);box-shadow:var(--shadow-sm)}
  .nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
  .nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

  /* 按钮 */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    border:0;cursor:pointer;font-weight:600;font-size:16px;line-height:1;
    padding:14px 28px;border-radius:var(--radius-pill);
    transition:transform 180ms var(--ease),box-shadow 180ms var(--ease),background-color 180ms var(--ease),color 180ms var(--ease),border-color 180ms var(--ease);
    text-align:center;white-space:nowrap;
  }
  .btn-primary{background:var(--brand-600);color:#fff;box-shadow:var(--shadow-sm)}
  .btn-primary:hover{background:var(--brand-700);transform:translateY(-2px);box-shadow:var(--shadow-md)}
  .btn-primary:active{transform:translateY(0);box-shadow:var(--shadow-sm)}
  .btn-ghost{background:transparent;color:var(--brand-700);border:1.5px solid var(--brand-600)}
  .btn-ghost:hover{background:rgba(20,101,92,.08);transform:translateY(-2px)}
  .btn-ghost:active{transform:translateY(0)}
  .btn-on-dark{background:#fff;color:var(--brand-700)}
  .btn-on-dark:hover{background:var(--brand-050);transform:translateY(-2px);box-shadow:var(--shadow-md)}
  .btn-outline-light{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.55)}
  .btn-outline-light:hover{background:rgba(255,255,255,.12);transform:translateY(-2px)}
  .btn-sm{padding:10px 20px;font-size:14.5px}
  .btn-block{width:100%}
  .btn:disabled,.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}
  .btn.is-loading{pointer-events:none;opacity:.8}
  .spinner{width:16px;height:16px;border:2px solid rgba(255,255,255,.45);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite}
  @keyframes spin{to{transform:rotate(360deg)}}
  .link-more{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand-600);position:relative}
  .link-more::after{content:"";position:absolute;left:0;bottom:-3px;width:0;height:1.5px;background:var(--brand-600);transition:width 180ms var(--ease)}
  .link-more:hover::after{width:100%}
  .link-more:hover{color:var(--accent-600)}
  .link-more:hover::after{background:var(--accent-600)}

  /* 徽章与标签 */
  .badge{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:var(--radius-pill);font-size:12.5px;font-weight:600;letter-spacing:.3px;background:var(--brand-050);color:var(--brand-700)}
  .badge-accent{background:var(--accent-200);color:var(--accent-600)}
  .badge-success{background:rgba(46,125,91,.12);color:var(--success)}
  .tag{display:inline-flex;align-items:center;padding:6px 14px;border-radius:var(--radius-pill);border:1px solid var(--line);background:#fff;font-size:13px;color:var(--ink-700)}
  .muted{color:var(--ink-500)}

  /* 面包屑 */
  .breadcrumb{background:var(--bg-alt);border-bottom:1px solid var(--line);padding:12px 0;font-size:13px;color:var(--ink-500)}
  .breadcrumb ol{display:flex;align-items:center;flex-wrap:wrap;gap:8px}
  .breadcrumb li{display:inline-flex;align-items:center;gap:8px;max-width:100%}
  .breadcrumb li+li::before{content:"/";color:var(--ink-300)}
  .breadcrumb a{color:var(--ink-500);transition:color 180ms var(--ease)}
  .breadcrumb a:hover{color:var(--brand-600)}
  .breadcrumb .current{color:var(--brand-700);font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:52vw}

  /* 居中窄栏页头 */
  .page-head{padding:150px 0 64px;background:var(--bg)}
  .page-head-inner{max-width:820px;margin:0 auto;text-align:center}
  .page-title{font-size:44px;line-height:1.2;font-weight:700;letter-spacing:-.5px;margin:18px 0 16px}
  .page-sub{font-size:18px;line-height:1.75;color:var(--ink-700);margin:0 auto;max-width:660px}
  .head-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:32px}
  .head-facts{display:flex;flex-wrap:wrap;justify-content:center;gap:14px 28px;margin-top:36px;font-size:14px;color:var(--ink-500)}
  .head-facts .fact{display:inline-flex;align-items:baseline;gap:8px}
  .head-facts .fact b{font-size:22px;font-weight:700;color:var(--brand-700);font-variant-numeric:tabular-nums}

  /* 图文卡网格 */
  .feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
  .card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-sm);transition:transform 200ms var(--ease),box-shadow 200ms var(--ease),border-color 200ms var(--ease);overflow:hidden}
  .card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--brand-300)}
  .card-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--bg-alt)}
  .card-media img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform 260ms var(--ease);box-shadow:inset 0 0 0 1px rgba(10,46,42,.06)}
  .card:hover .card-media img{transform:scale(1.03)}
  .card-media::after{content:"";position:absolute;inset:0;border-radius:0;box-shadow:inset 0 0 0 1px rgba(10,46,42,.06);pointer-events:none}
  .card-body{padding:26px 28px 30px}
  .card-title{font-size:24px;line-height:1.35;font-weight:700;margin:0 0 10px}
  .card-text{font-size:15.5px;line-height:1.8;color:var(--ink-500);margin:0}
  .card-index{display:inline-block;font-size:13px;font-weight:700;letter-spacing:1px;color:var(--brand-500);margin-bottom:10px}

  /* 对照表 */
  .table-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-sm);overflow:hidden}
  .table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
  .spec-table{width:100%;min-width:760px;border-collapse:collapse}
  .spec-table caption{caption-side:top;text-align:left;padding:22px 26px 6px;font-size:14px;color:var(--ink-500)}
  .spec-table th{background:var(--brand-050);color:var(--brand-700);font-size:13.5px;font-weight:600;letter-spacing:.3px;text-align:left;padding:16px 22px;border-bottom:1px solid var(--line);white-space:nowrap}
  .spec-table td{padding:17px 22px;border-top:1px solid var(--line);font-size:15px;color:var(--ink-700);vertical-align:top}
  .spec-table tbody tr:nth-child(even){background:#FBFCFB}
  .spec-table tbody tr:hover{background:var(--brand-050)}
  .spec-table td:first-child{font-weight:600;color:var(--ink-900)}
  .table-foot{padding:16px 22px;font-size:13.5px;color:var(--ink-500);border-top:1px solid var(--line)}

  /* 规格清单 */
  .spec-list{margin-top:8px;border-top:1px solid var(--line)}
  .spec-row{display:grid;grid-template-columns:220px 1fr;gap:24px;padding:18px 12px;border-bottom:1px solid var(--line);transition:background-color 180ms var(--ease)}
  .spec-row:hover{background:var(--brand-050)}
  .spec-label{font-size:15px;font-weight:600;color:var(--brand-700)}
  .spec-value{font-size:15px;color:var(--ink-700)}

  /* FAQ 手风琴 */
  .faq-list{max-width:820px;margin:0 auto;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-sm);padding:4px 28px}
  .faq-item{border-top:1px solid var(--line)}
  .faq-item:first-child{border-top:0}
  .faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:22px 0;background:none;border:0;cursor:pointer;text-align:left;font-size:17px;font-weight:600;color:var(--ink-900);transition:color 180ms var(--ease)}
  .faq-q:hover{color:var(--brand-600)}
  .faq-icon{flex:0 0 auto;width:30px;height:30px;border-radius:50%;border:1px solid var(--brand-300);background:var(--brand-050);color:var(--brand-600);display:inline-flex;align-items:center;justify-content:center;font-size:18px;line-height:1;transition:transform 220ms var(--ease),background-color 180ms var(--ease)}
  .faq-item.is-open .faq-icon{transform:rotate(-45deg);background:var(--brand-600);color:#fff;border-color:var(--brand-600)}
  .faq-a{max-height:0;overflow:hidden;transition:max-height 220ms var(--ease)}
  .faq-a-inner{padding:0 46px 22px 0;font-size:15px;line-height:1.8;color:var(--ink-700)}

  /* 互链卡片 */
  .related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
  .related-card{display:flex;flex-direction:column;gap:10px;padding:28px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-sm);transition:transform 200ms var(--ease),box-shadow 200ms var(--ease),border-color 200ms var(--ease)}
  .related-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--brand-300)}
  .related-card h3{font-size:19px;font-weight:700;margin:0}
  .related-card p{font-size:14.5px;line-height:1.75;color:var(--ink-500);margin:0}
  .related-card .link-more{margin-top:auto}

  /* CTA 深色区 */
  .cta-band{position:relative;padding:88px 0;background-color:var(--brand-700);background-image:linear-gradient(rgba(10,46,42,.86),rgba(10,46,42,.9)),url("/assets/images/backpic/back-2.png");background-size:cover;background-position:center;color:#fff;border-radius:20px;overflow:hidden}
  .cta-inner{max-width:820px;margin:0 auto;text-align:center}
  .cta-inner h2{font-size:38px;line-height:1.25;font-weight:700;margin:0 0 16px;letter-spacing:-.5px}
  .cta-inner p{font-size:17px;line-height:1.8;color:rgba(255,255,255,.86);margin:0 auto;max-width:640px}
  .cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:32px}
  .contact-lines{display:flex;flex-wrap:wrap;justify-content:center;gap:12px 28px;margin-top:30px;font-size:14.5px;color:rgba(255,255,255,.78)}
  .contact-lines span{display:inline-flex;align-items:center;gap:8px}
  .contact-lines svg{flex:0 0 auto;opacity:.85}

  /* 页脚 */
  .site-footer{background:var(--dark);color:rgba(255,255,255,.88);padding:72px 0 0;margin-top:96px}
  .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
  .footer-brand{display:inline-flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:19px;margin-bottom:14px}
  .footer-brand .logo-mark{color:var(--brand-300)}
  .site-footer p{font-size:14.5px;line-height:1.8;color:rgba(255,255,255,.64);margin:0}
  .footer-title{font-size:14px;font-weight:600;letter-spacing:.4px;color:#fff;margin:0 0 16px}
  .footer-links li{margin-bottom:10px}
  .footer-links a{font-size:14.5px;color:rgba(255,255,255,.72);transition:color 180ms var(--ease)}
  .footer-links a:hover{color:var(--accent-500);text-decoration:underline}
  .footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:20px 0 28px;display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;font-size:13.5px;color:rgba(255,255,255,.6)}
  .footer-bottom a{color:rgba(255,255,255,.72)}
  .footer-bottom a:hover{color:var(--accent-500)}

  /* 浮动 CTA */
  .float-stack{position:fixed;right:24px;bottom:28px;z-index:800;display:flex;flex-direction:column;align-items:flex-end;gap:12px;opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity 220ms var(--ease),transform 220ms var(--ease),visibility 220ms}
  .float-stack.is-on{opacity:1;visibility:visible;transform:none}
  .float-btn{display:inline-flex;align-items:center;gap:8px;padding:14px 24px;border-radius:var(--radius-pill);background:var(--accent-500);color:#fff;font-size:15px;font-weight:600;box-shadow:var(--shadow-md);border:0;cursor:pointer;transition:transform 180ms var(--ease),background-color 180ms var(--ease)}
  .float-btn:hover{background:var(--accent-600);transform:translateY(-2px)}
  .float-top{width:46px;height:46px;border-radius:50%;background:#fff;color:var(--brand-700);border:1px solid var(--line);box-shadow:var(--shadow-sm);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:transform 180ms var(--ease),box-shadow 180ms var(--ease),border-color 180ms var(--ease)}
  .float-top:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--brand-300)}

  /* 入场动效 */
  .reveal{opacity:0;transform:translateY(12px);transition:opacity .55s var(--ease),transform .55s var(--ease)}
  .reveal.is-visible{opacity:1;transform:none}

  /* 断点 */
  @media (max-width:1199px){
    .container{padding:0 28px}
    .section{padding:84px 0}
    .page-title{font-size:40px}
    .section-title{font-size:34px}
  }
  @media (max-width:1023px){
    .container{padding:0 24px}
    .section{padding:72px 0}
    .feature-grid{grid-template-columns:1fr}
    .related-grid{grid-template-columns:1fr 1fr}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
    .section-head{flex-direction:column;align-items:flex-start;gap:12px}
    .section-sub{max-width:none}
    .page-head{padding:138px 0 56px}
    .page-title{font-size:34px}
    .cta-band{border-radius:16px;padding:72px 0}
    .cta-inner h2{font-size:30px}
  }
  @media (max-width:900px){
    .site-header{padding:0 14px;top:12px}
    .nav-shell{height:60px;padding:0 12px 0 16px}
    .nav-toggle{display:inline-flex}
    .nav-panel{
      position:fixed;left:0;right:0;top:0;z-index:1;
      padding:92px 20px 28px;background:#fff;
      border-radius:0 0 20px 20px;box-shadow:var(--shadow-lg);
      display:flex;flex-direction:column;align-items:stretch;gap:16px;
      transform:translateY(-108%);transition:transform 280ms var(--ease);
    }
    .nav-panel.is-open{transform:translateY(0)}
    .nav-links{flex-direction:column;align-items:stretch;gap:6px}
    .nav-link{height:48px;padding:0 16px;border-radius:12px;font-size:16px}
    .nav-link.is-active{background:var(--brand-050)}
    .nav-link.is-active::after{display:none}
    .nav-actions{flex-direction:column;align-items:stretch}
    .nav-actions .btn{width:100%}
    body.nav-locked{overflow:hidden}
  }
  @media (max-width:767px){
    body{font-size:16px}
    .container{padding:0 20px}
    .section{padding:56px 0}
    .page-head{padding:126px 0 48px}
    .page-title{font-size:30px}
    .page-sub{font-size:16.5px}
    .head-actions{flex-direction:column;align-items:stretch}
    .head-actions .btn{width:100%}
    .head-facts{gap:10px 20px}
    .section-title{font-size:26px}
    .card-title{font-size:20px}
    .card-body{padding:22px 22px 26px}
    .spec-row{grid-template-columns:1fr;gap:6px;padding:16px 8px}
    .related-grid{grid-template-columns:1fr}
    .faq-list{padding:2px 20px}
    .faq-a-inner{padding-right:0}
    .footer-grid{grid-template-columns:1fr}
    .cta-inner h2{font-size:26px}
    .float-stack{left:0;right:0;bottom:0;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:rgba(255,255,255,.94);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-top:1px solid var(--line);flex-direction:row;align-items:center;justify-content:space-between}
    .float-btn{flex:1;justify-content:center}
    .site-footer{padding-top:56px;margin-top:64px}
  }
  @media (max-width:480px){
    body{font-size:15.5px}
    .page-title{font-size:27px}
    .section-title{font-size:23px}
    .logo-text{font-size:16.5px}
    .btn{padding:13px 22px;font-size:15px}
    .head-facts .fact b{font-size:19px}
  }
  @media (prefers-reduced-motion:reduce){
    html{scroll-behavior:auto}
    *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
    .reveal{opacity:1;transform:none}
  }