/* roulang page: index */
:root{
  --ink:#1F2A44;
  --ink-2:#2C395A;
  --brand:#F2542D;
  --brand-dark:#D9431F;
  --mint:#2FB6A0;
  --bg:#F7F5F2;
  --card:#FFFFFF;
  --line:#E6E2DB;
  --text:#3B4356;
  --muted:#6E7689;
  --radius-s:10px;
  --radius-m:16px;
  --radius-l:24px;
  --shadow-1:0 1px 2px rgba(31,42,68,.06);
  --shadow-2:0 8px 24px rgba(31,42,68,.10);
  --shadow-3:0 16px 40px rgba(242,84,45,.14);
  --container:1180px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--card);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding-left:1.2em;}
a{color:var(--brand);text-decoration:none;transition:color .16s ease;}
a:hover{color:var(--brand-dark);text-decoration:underline;}
img{max-width:100%;display:block;}
button{font-family:inherit;cursor:pointer;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.container{max-width:var(--container);margin:0 auto;padding:0 32px;}

/* ============ header ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 18px rgba(31,42,68,.08);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px;transition:height .2s ease;}
.site-header.is-scrolled .nav-inner{height:58px;}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);}
.brand:hover{text-decoration:none;color:var(--ink);}
.brand-mark{
  width:38px;height:38px;border-radius:11px;background:var(--brand);
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:700;font-size:16px;letter-spacing:0;flex:0 0 auto;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-name{font-size:15px;font-weight:700;color:var(--ink);white-space:nowrap;}
.brand-sub{font-size:11px;color:var(--muted);white-space:nowrap;}
.nav-menu{display:flex;align-items:center;gap:28px;}
.nav-link{
  position:relative;display:inline-block;padding:6px 0;font-size:15px;color:var(--text);
  white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--brand);
  transition:width .18s ease;
}
.nav-link:hover{color:var(--brand);text-decoration:none;}
.nav-link:hover::after{width:100%;}
.nav-link.active{color:var(--ink);font-weight:600;}
.nav-link.active::after{width:100%;}
.nav-cta{display:inline-flex;align-items:center;gap:8px;}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--radius-s);
  background:#fff;padding:0;align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);transition:transform .2s ease,opacity .2s 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);}
.drawer{display:none;border-top:1px solid var(--line);background:#fff;}
.drawer.is-open{display:block;}
.drawer-menu{list-style:none;margin:0;padding:8px 0 16px;}
.drawer-menu li{border-bottom:1px solid var(--line);}
.drawer-menu li:last-child{border-bottom:0;}
.drawer-menu a{
  display:block;padding:12px 32px;min-height:44px;color:var(--ink);font-size:15px;
}
.drawer-menu a:hover{background:var(--bg);text-decoration:none;color:var(--brand);}

/* ============ buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-s);font-size:15px;font-weight:600;
  border:1px solid transparent;transition:all .16s ease;text-align:center;
}
.btn:hover{text-decoration:none;}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 4px 14px rgba(242,84,45,.22);}
.btn-primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-outline{border-color:var(--ink);color:var(--ink);background:transparent;}
.btn-outline:hover{background:#EFEDE8;color:var(--ink);}
.btn-light{background:#fff;color:var(--ink);}
.btn-light:hover{background:#F2EFE9;color:var(--ink);}
.btn-ghost-light{border-color:rgba(255,255,255,.5);color:#fff;background:transparent;}
.btn-ghost-light:hover{background:rgba(255,255,255,.12);color:#fff;}
.btn-sm{padding:9px 16px;font-size:14px;}

/* ============ hero ============ */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:var(--ink) url("/assets/images/40bebc544d372990.webp") center/cover no-repeat;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(20,27,44,.93) 0%,rgba(20,27,44,.84) 52%,rgba(20,27,44,.62) 100%);
}
.hero-inner{position:relative;padding:64px 0 0;}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.82);
  border:1px solid rgba(255,255,255,.28);border-radius:999px;padding:5px 14px;margin-bottom:20px;
}
.hero-eyebrow i{width:7px;height:7px;border-radius:50%;background:var(--mint);display:inline-block;}
.hero h1{
  font-size:42px;line-height:1.26;font-weight:700;letter-spacing:0;max-width:900px;color:#fff;
}
.hero-sub{
  margin-top:18px;max-width:800px;font-size:17px;line-height:1.85;color:rgba(255,255,255,.84);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-metrics{
  position:relative;margin-top:44px;padding:22px 0 26px;border-top:1px solid rgba(255,255,255,.16);
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
}
.metric-value{font-size:24px;font-weight:700;color:#fff;line-height:1.3;}
.metric-value em{font-style:normal;font-size:14px;font-weight:400;color:rgba(255,255,255,.7);margin-left:6px;}
.metric-label{font-size:13px;color:rgba(255,255,255,.72);margin-top:4px;}

/* ============ pill bar ============ */
.pill-bar{background:var(--bg);border-bottom:1px solid var(--line);padding:14px 0;}
.pill-track{
  display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
  padding:2px;
}
.pill-track::-webkit-scrollbar{display:none;}
.chip{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:999px;
  background:#fff;border:1px solid var(--line);color:var(--text);font-size:14px;
  white-space:nowrap;transition:all .15s ease;flex:0 0 auto;
}
.chip:hover{background:#EFEDE7;color:var(--ink);text-decoration:none;border-color:#D9D4CB;}
.chip.is-active{background:var(--brand);color:#fff;border-color:var(--brand);box-shadow:inset 0 0 0 2px rgba(255,255,255,.4);}
.chip.is-active:hover{background:var(--brand-dark);color:#fff;}

/* ============ section base ============ */
.section{padding:88px 0;}
.section--alt{background:var(--bg);}
.section--dark{background:var(--ink);color:#fff;}
.section-head{max-width:820px;margin-bottom:40px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:.04em;
  color:var(--brand);background:rgba(242,84,45,.09);border-radius:6px;padding:4px 10px;margin-bottom:14px;
}
.section--dark .eyebrow{color:#FFB39C;background:rgba(242,84,45,.18);}
.section h2{font-size:30px;line-height:1.35;color:var(--ink);font-weight:700;}
.section--dark h2{color:#fff;}
.section-head p{margin-top:14px;font-size:16px;line-height:1.85;color:var(--muted);}
.section--dark .section-head p{color:rgba(255,255,255,.76);}
h3{font-size:19px;line-height:1.5;color:var(--ink);font-weight:600;}

/* ============ 品类入口 ============ */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.cat-card{
  display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--radius-m);
  padding:22px;box-shadow:var(--shadow-1);transition:all .18s ease;color:var(--text);
}
.cat-card:hover{
  text-decoration:none;transform:translateY(-2px);box-shadow:var(--shadow-2);
  border-color:#DCD6CC;color:var(--text);
}
.cat-card:hover h3{color:var(--brand);}
.cat-icon{
  width:42px;height:42px;border-radius:12px;background:rgba(47,182,160,.12);color:#1F8C7B;
  display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;margin-bottom:14px;
}
.cat-card h3{font-size:17px;margin-bottom:8px;transition:color .16s ease;}
.cat-card p{font-size:14px;line-height:1.75;color:var(--muted);}

/* ============ 信息分组 ============ */
.group-layout{display:grid;grid-template-columns:220px 1fr;gap:28px;align-items:start;}
.group-tabs{display:flex;flex-direction:column;gap:10px;}
.group-tab{
  border:1px solid var(--line);background:#fff;border-radius:var(--radius-s);
  padding:12px 16px;text-align:left;font-size:14px;color:var(--text);transition:all .16s ease;
}
.group-tab:hover{border-color:#CFC9BE;background:#F2EFE9;}
.group-tab.is-active{background:var(--ink);color:#fff;border-color:var(--ink);font-weight:600;}
.group-tab small{display:block;font-size:12px;font-weight:400;color:var(--muted);margin-top:2px;}
.group-tab.is-active small{color:rgba(255,255,255,.7);}
.info-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.info-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);padding:22px;
  box-shadow:var(--shadow-1);transition:all .18s ease;display:flex;flex-direction:column;
}
.info-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);}
.tag{
  display:inline-block;align-self:flex-start;font-size:12px;font-weight:600;color:#1F8C7B;
  background:rgba(47,182,160,.12);border-radius:6px;padding:3px 9px;margin-bottom:12px;
}
.tag.warm{color:#B4441F;background:rgba(242,84,45,.1);}
.info-card h3{font-size:17px;margin-bottom:8px;}
.info-card p{font-size:14px;line-height:1.78;color:var(--muted);flex:1;}
.card-link{display:inline-block;margin-top:14px;font-size:14px;font-weight:600;color:var(--brand);}
.card-link:hover{color:var(--brand-dark);text-decoration:underline;}

/* ============ 流程三步 ============ */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.step{position:relative;padding:26px 24px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);box-shadow:var(--shadow-1);}
.step::after{
  content:"";position:absolute;top:50%;right:-24px;width:24px;border-top:2px dashed #CFC9BE;
}
.step:last-child::after{display:none;}
.step-num{
  width:34px;height:34px;border-radius:50%;background:var(--brand);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:700;margin-bottom:14px;
}
.step h3{font-size:17px;margin-bottom:8px;}
.step p{font-size:14px;line-height:1.78;color:var(--muted);}

/* ============ 使用场景 ============ */
.scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.scene-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);overflow:hidden;
  border-left:3px solid var(--brand);box-shadow:var(--shadow-1);transition:all .18s ease;
}
.scene-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);}
.scene-card:nth-child(even){margin-top:36px;}
.scene-figure{aspect-ratio:16/8;overflow:hidden;background:#EDE9E2;}
.scene-figure img{width:100%;height:100%;object-fit:cover;}
.scene-body{padding:22px;}
.scene-meta{font-size:13px;color:var(--brand);font-weight:600;margin-bottom:6px;}
.scene-body h3{font-size:18px;margin-bottom:10px;}
.scene-body ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:6px;}
.scene-body li{
  position:relative;padding-left:18px;font-size:14px;line-height:1.75;color:var(--muted);
}
.scene-body li::before{
  content:"";position:absolute;left:0;top:.65em;width:7px;height:7px;border-radius:2px;background:var(--mint);
}

/* ============ 附近范围 ============ */
.range-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.range-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);padding:24px;
  box-shadow:var(--shadow-1);transition:all .18s ease;
}
.range-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);}
.range-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px;}
.range-head h3{font-size:17px;}
.range-distance{font-size:13px;color:var(--mint);font-weight:600;white-space:nowrap;}
.range-card p{font-size:14px;line-height:1.78;color:var(--muted);}

/* ============ 演示 + 下载 ============ */
.demo-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;}
.device-stage{display:flex;gap:18px;align-items:flex-end;}
.window-frame{
  flex:1;background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:var(--shadow-2);
}
.window-bar{display:flex;gap:5px;padding:10px 12px;background:#F2EFE9;border-bottom:1px solid var(--line);}
.window-bar i{width:8px;height:8px;border-radius:50%;background:#D6D0C6;display:block;}
.window-body{padding:16px;display:flex;flex-direction:column;gap:10px;}
.skeleton{height:12px;border-radius:4px;background:#EDE9E2;}
.skeleton.w70{width:70%;}
.skeleton.w50{width:50%;}
.skeleton.block{height:64px;border-radius:10px;background:rgba(47,182,160,.14);}
.phone-frame{
  width:158px;flex:0 0 auto;background:#fff;border:1px solid var(--line);border-radius:20px;
  padding:10px;box-shadow:var(--shadow-2);
}
.phone-screen{background:#F7F5F2;border-radius:14px;padding:12px;display:flex;flex-direction:column;gap:8px;min-height:212px;}
.phone-notch{width:44px;height:5px;border-radius:3px;background:#DCD6CC;margin:0 auto 8px;}
.device-caption{font-size:12px;color:var(--muted);text-align:center;margin-top:8px;}
.demo-copy h2{font-size:28px;line-height:1.38;color:var(--ink);}
.demo-copy p{margin-top:14px;font-size:15px;line-height:1.85;color:var(--muted);}
.demo-copy .hero-actions{margin-top:24px;}

/* ============ 下载区 ============ */
.download-band{background:var(--ink);color:#fff;padding:72px 0;}
.download-band .section-head p{color:rgba(255,255,255,.76);}
.download-band h2{color:#fff;}
.download-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.download-card{
  display:flex;align-items:center;gap:14px;padding:22px;border-radius:var(--radius-m);
  border:1px solid rgba(255,255,255,.26);background:rgba(255,255,255,.04);color:#fff;
  transition:all .18s ease;
}
.download-card:hover{
  background:var(--brand);border-color:var(--brand);color:#fff;text-decoration:none;transform:translateY(-2px);
}
.dl-icon{
  width:44px;height:44px;border-radius:12px;background:rgba(255,255,255,.12);
  display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:700;flex:0 0 auto;
}
.download-card:hover .dl-icon{background:rgba(255,255,255,.22);}
.dl-text strong{display:block;font-size:16px;font-weight:600;}
.dl-text span{display:block;font-size:12px;color:rgba(255,255,255,.72);margin-top:2px;}
.download-card:hover .dl-text span{color:rgba(255,255,255,.88);}

/* ============ 案例 ============ */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.case-card{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);
  padding:26px 22px 22px;box-shadow:var(--shadow-1);transition:all .18s ease;
}
.case-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);}
.case-index{
  position:absolute;top:16px;right:18px;font-size:12px;font-weight:700;color:var(--brand);
  background:rgba(242,84,45,.1);border-radius:6px;padding:2px 8px;
}
.case-card h3{font-size:17px;margin-bottom:10px;}
.case-card p{font-size:14px;line-height:1.8;color:var(--muted);}

/* ============ 方案对照 ============ */
.plan-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:stretch;}
.plan-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-l);padding:28px 24px;
  display:flex;flex-direction:column;box-shadow:var(--shadow-1);transition:all .18s ease;
}
.plan-card:hover{box-shadow:var(--shadow-2);}
.plan-card.featured{
  border:2px solid var(--brand);box-shadow:var(--shadow-3);transform:translateY(-4px);
}
.plan-name{font-size:18px;font-weight:700;color:var(--ink);}
.plan-for{font-size:13px;color:var(--muted);margin-top:6px;min-height:44px;}
.plan-list{list-style:none;padding:0;margin:18px 0 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.plan-list li{position:relative;padding-left:24px;font-size:14px;line-height:1.7;color:var(--text);}
.plan-list li::before{
  content:"✓";position:absolute;left:0;top:0;color:var(--mint);font-weight:700;font-size:14px;
}
.plan-card .btn{width:100%;}
.plan-badge{
  display:inline-block;font-size:12px;font-weight:600;color:#fff;background:var(--brand);
  border-radius:6px;padding:2px 8px;margin-bottom:10px;align-self:flex-start;
}

/* ============ 反馈要点 ============ */
.feedback-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.feedback-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);padding:24px;
  box-shadow:var(--shadow-1);
}
.feedback-card:nth-child(2){margin-top:28px;}
.feedback-card:nth-child(4){margin-top:28px;}
.feedback-card h3{font-size:16px;margin-bottom:10px;}
.feedback-card p{font-size:14px;line-height:1.8;color:var(--muted);}
.feedback-foot{display:flex;align-items:center;gap:10px;margin-top:16px;}
.avatar-dot{width:28px;height:28px;border-radius:50%;background:#EDE9E2;flex:0 0 auto;}
.feedback-role{font-size:12px;color:var(--muted);}

/* ============ 速览短句 ============ */
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
.quote-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-s);padding:18px 20px;
  display:flex;align-items:center;gap:12px;font-size:15px;color:var(--ink);font-weight:600;
  transition:all .16s ease;
}
.quote-item:hover{border-color:#D9D4CB;box-shadow:var(--shadow-1);transform:translateY(-2px);}
.quote-item .dot{
  width:10px;height:10px;border-radius:50%;background:var(--mint);flex:0 0 auto;
}

/* ============ 安全提示 ============ */
.safety-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.safety-item{
  background:var(--bg);border:1px solid var(--line);border-radius:var(--radius-m);padding:22px;
}
.safety-item h3{font-size:16px;margin-bottom:8px;display:flex;align-items:center;gap:8px;}
.safety-item h3 i{
  width:22px;height:22px;border-radius:6px;background:rgba(242,84,45,.12);color:var(--brand);
  display:inline-flex;align-items:center;justify-content:center;font-size:12px;font-style:normal;font-weight:700;
}
.safety-item p{font-size:14px;line-height:1.8;color:var(--muted);}

/* ============ 资讯列表 ============ */
.news-layout{display:grid;grid-template-columns:1fr 300px;gap:32px;align-items:start;}
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.news-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);
  box-shadow:var(--shadow-1);transition:all .18s ease;overflow:hidden;
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);}
.news-card .news-inner{display:block;padding:22px;color:var(--text);}
.news-card .news-inner:hover{text-decoration:none;color:var(--text);}
.news-card:hover h3{color:var(--brand);}
.news-card h3{
  font-size:16px;line-height:1.6;margin-bottom:8px;transition:color .16s ease;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card p{
  font-size:13px;line-height:1.75;color:var(--muted);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-time{display:block;margin-top:14px;font-size:12px;color:#9AA0AE;}
.news-empty{
  background:#fff;border:1px dashed #D9D4CB;border-radius:var(--radius-m);
  padding:56px 24px;text-align:center;color:var(--muted);grid-column:1/-1;
}
.news-empty .empty-icon{
  width:56px;height:56px;margin:0 auto 14px;border-radius:16px;background:rgba(47,182,160,.12);
  display:flex;align-items:center;justify-content:center;color:#1F8C7B;font-size:20px;font-weight:700;
}
.news-side{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);padding:24px;
  box-shadow:var(--shadow-1);
}
.news-side h3{font-size:16px;margin-bottom:14px;}
.news-side ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:12px;}
.news-side li{font-size:14px;line-height:1.7;color:var(--muted);padding-left:14px;position:relative;}
.news-side li::before{
  content:"";position:absolute;left:0;top:.7em;width:6px;height:6px;border-radius:50%;background:var(--brand);
}

/* ============ CTA ============ */
.cta-band{
  background:linear-gradient(180deg,#FDF2EE 0%,#F9E7E0 100%);
  border-radius:var(--radius-l);padding:48px;
  display:flex;align-items:center;justify-content:space-between;gap:40px;
}
.cta-band h2{font-size:28px;line-height:1.4;color:var(--ink);}
.cta-band p{margin-top:12px;font-size:15px;line-height:1.8;color:#6B5C55;max-width:640px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;flex:0 0 auto;}

/* ============ footer ============ */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:64px 0 28px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-mark{background:var(--brand);}
.footer-brand strong{color:#fff;font-size:15px;font-weight:700;}
.footer-desc{font-size:14px;line-height:1.85;color:rgba(255,255,255,.66);max-width:340px;}
.footer-col h4{color:#fff;font-size:14px;font-weight:600;margin-bottom:14px;}
.footer-col ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px;}
.footer-col a{color:rgba(255,255,255,.7);font-size:14px;}
.footer-col a:hover{color:#FFB39C;text-decoration:none;}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;color:rgba(255,255,255,.55);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
}

/* ============ responsive ============ */
@media (max-width:1199px){
  .hero h1{font-size:36px;}
  .section{padding:72px 0;}
}
@media (max-width:991px){
  .container{padding:0 24px;}
  .nav-menu,.nav-cta{display:none;}
  .nav-toggle{display:flex;}
  .hero h1{font-size:32px;}
  .hero-sub{font-size:16px;}
  .cat-grid{grid-template-columns:repeat(2,1fr);}
  .group-layout{grid-template-columns:1fr;}
  .group-tabs{flex-direction:row;overflow-x:auto;padding-bottom:4px;}
  .group-tab{white-space:nowrap;flex:0 0 auto;}
  .steps{grid-template-columns:1fr;}
  .step::after{display:none;}
  .scene-grid{grid-template-columns:1fr;}
  .scene-card:nth-child(even){margin-top:0;}
  .range-grid{grid-template-columns:1fr;}
  .demo-layout{grid-template-columns:1fr;}
  .download-grid{grid-template-columns:1fr;}
  .case-grid{grid-template-columns:1fr;}
  .plan-grid{grid-template-columns:1fr;}
  .plan-card.featured{transform:none;}
  .news-layout{grid-template-columns:1fr;}
  .quote-grid{grid-template-columns:repeat(2,1fr);}
  .cta-band{flex-direction:column;align-items:flex-start;padding:36px 28px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .hero-inner{padding:44px 0 0;}
  .hero h1{font-size:27px;line-height:1.32;}
  .hero-sub{font-size:15px;}
  .hero-metrics{grid-template-columns:1fr;gap:16px;padding:20px 0 24px;}
  .section{padding:48px 0;}
  .section h2{font-size:23px;}
  .section-head{margin-bottom:28px;}
  .info-cards{grid-template-columns:1fr;}
  .feedback-grid{grid-template-columns:1fr;}
  .feedback-card:nth-child(2),.feedback-card:nth-child(4){margin-top:0;}
  .news-grid{grid-template-columns:1fr;}
  .safety-grid{grid-template-columns:1fr;}
  .cat-grid{grid-template-columns:1fr;}
  .quote-grid{grid-template-columns:1fr;}
  .btn{min-height:44px;}
  .hero-actions .btn{flex:1 1 100%;}
  .device-stage{flex-direction:column;align-items:stretch;}
  .phone-frame{width:100%;max-width:220px;margin:0 auto;}
  .cta-band{padding:28px 20px;border-radius:var(--radius-m);}
  .cta-band h2{font-size:22px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 100%;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .site-footer{padding:48px 0 24px;}
}
@media (max-width:520px){
  .brand-name{font-size:14px;}
  .brand-sub{font-size:10px;}
  .brand-mark{width:34px;height:34px;font-size:14px;}
  .hero h1{font-size:25px;}
  .metric-value{font-size:20px;}
}

/* roulang page: article */
:root{
  --ink:#1F2A44;
  --ink-2:#2C395A;
  --brand:#F2542D;
  --brand-dark:#D9431F;
  --mint:#2FB6A0;
  --bg:#F7F5F2;
  --card:#FFFFFF;
  --line:#E6E2DB;
  --text:#3B4356;
  --muted:#6E7689;
  --radius-s:10px;
  --radius-m:16px;
  --radius-l:24px;
  --shadow-1:0 1px 2px rgba(31,42,68,.06);
  --shadow-2:0 8px 24px rgba(31,42,68,.10);
  --shadow-3:0 16px 40px rgba(242,84,45,.14);
  --container:1180px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--card);
  -webkit-font-smoothing:antialiased;
}
a{color:var(--brand);text-decoration:none;transition:color .16s ease;}
a:hover{color:var(--brand-dark);text-decoration:underline;}
img{max-width:100%;display:block;}
button{font-family:inherit;cursor:pointer;}
h1,h2,h3,h4{margin:0;letter-spacing:0;}
.container{max-width:var(--container);margin:0 auto;padding:0 32px;}

/* ============ header ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 18px rgba(31,42,68,.08);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:68px;transition:height .2s ease;}
.site-header.is-scrolled .nav-inner{height:58px;}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);flex:0 0 auto;}
.brand:hover{text-decoration:none;color:var(--ink);}
.brand-mark{
  width:38px;height:38px;border-radius:11px;background:var(--brand);
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:700;font-size:16px;flex:0 0 auto;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-name{font-size:15px;font-weight:700;color:var(--ink);white-space:nowrap;}
.brand-sub{font-size:11px;color:var(--muted);white-space:nowrap;}
.nav-menu{display:flex;align-items:center;gap:26px;}
.nav-link{
  position:relative;display:inline-block;padding:6px 0;font-size:15px;color:var(--text);
  white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--brand);
  transition:width .18s ease;
}
.nav-link:hover{color:var(--brand);text-decoration:none;}
.nav-link:hover::after{width:100%;}
.nav-link.active{color:var(--ink);font-weight:600;}
.nav-link.active::after{width:100%;}
.nav-cta{display:inline-flex;align-items:center;gap:8px;flex:0 0 auto;}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--radius-s);
  background:#fff;padding:0;align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);transition:transform .2s ease,opacity .2s 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);}
.drawer{display:none;border-top:1px solid var(--line);background:#fff;}
.drawer.is-open{display:block;}
.drawer-menu{list-style:none;margin:0;padding:8px 0 16px;}
.drawer-menu li{border-bottom:1px solid var(--line);}
.drawer-menu li:last-child{border-bottom:0;}
.drawer-menu a{display:block;padding:12px 32px;min-height:44px;color:var(--ink);font-size:15px;}
.drawer-menu a:hover{background:var(--bg);text-decoration:none;color:var(--brand);}

/* ============ buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-s);font-size:15px;font-weight:600;
  border:1px solid transparent;transition:all .16s ease;text-align:center;
}
.btn:hover{text-decoration:none;}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 4px 14px rgba(242,84,45,.22);}
.btn-primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-outline{border-color:var(--ink);color:var(--ink);background:transparent;}
.btn-outline:hover{background:#EFEDE8;color:var(--ink);}
.btn-light{background:#fff;color:var(--ink);}
.btn-light:hover{background:#F2EFE9;color:var(--ink);}
.btn-sm{padding:9px 16px;font-size:14px;}
.btn-block{width:100%;}

/* ============ 文章页头 ============ */
.article-hero{background:var(--bg);border-bottom:1px solid var(--line);padding:26px 0 42px;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:22px;}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--brand);text-decoration:none;}
.breadcrumb .sep{color:#C9C3B9;}
.breadcrumb .current{color:var(--ink);font-weight:600;max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:14px;}
.tag{
  display:inline-flex;align-items:center;padding:3px 10px;border-radius:6px;
  background:rgba(242,84,45,.10);color:var(--brand-dark);font-size:12px;font-weight:600;
}
.tag-mint{background:rgba(47,182,160,.12);color:#1E8F7D;}
.meta-time{font-size:13px;color:var(--muted);}
.article-title{font-size:34px;line-height:1.34;color:var(--ink);font-weight:700;max-width:900px;word-break:break-word;}
.article-sub{margin-top:14px;font-size:15px;line-height:1.8;color:var(--muted);max-width:820px;}

/* ============ 正文 ============ */
.article-wrap{padding:56px 0 64px;background:#fff;}
.article-body{max-width:760px;margin:0 auto;font-size:17px;line-height:1.85;color:var(--text);word-break:break-word;}
.article-body p{margin:0 0 1.1em;}
.article-body h2{
  position:relative;font-size:24px;line-height:1.42;color:var(--ink);font-weight:700;
  margin:1.8em 0 .7em;padding-left:14px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.26em;bottom:.26em;width:4px;border-radius:2px;background:var(--brand);
}
.article-body h3{font-size:19px;line-height:1.5;color:var(--ink);font-weight:600;margin:1.5em 0 .55em;}
.article-body h4{font-size:17px;color:var(--ink-2);font-weight:600;margin:1.3em 0 .5em;}
.article-body ul,.article-body ol{margin:0 0 1.1em;padding-left:1.4em;}
.article-body li{margin:.35em 0;}
.article-body blockquote{
  margin:1.2em 0;padding:14px 18px;background:var(--bg);border-left:3px solid var(--brand);
  border-radius:0 var(--radius-s) var(--radius-s) 0;color:var(--ink-2);
}
.article-body img{border-radius:12px;border:1px solid var(--line);margin:1.2em 0;height:auto;}
.article-body table{width:100%;border-collapse:collapse;margin:1.2em 0;font-size:15px;border-radius:10px;overflow:hidden;}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top;}
.article-body th{background:var(--bg);color:var(--ink);font-weight:600;}
.article-body tbody tr:nth-child(even){background:#FBF9F6;}
.article-body strong{color:var(--ink);}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--brand-dark);}

.article-foot{max-width:760px;margin:36px auto 0;padding-top:24px;border-top:1px solid var(--line);}
.foot-label{font-size:13px;font-weight:600;color:var(--ink);margin-bottom:12px;}
.keyword-tags{display:flex;flex-wrap:wrap;gap:8px;}
.keyword-tags a{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:999px;
  background:var(--bg);border:1px solid var(--line);font-size:13px;color:var(--text);
  transition:all .16s ease;
}
.keyword-tags a:hover{background:#EFEDE7;color:var(--ink);text-decoration:none;border-color:#D9D4CB;}
.disclaimer{
  margin-top:18px;font-size:13px;line-height:1.75;color:var(--muted);
  background:var(--bg);border-radius:var(--radius-s);padding:14px 16px;
}
.article-empty{max-width:760px;margin:0 auto;text-align:center;padding:40px 20px;}
.article-empty h2{font-size:22px;color:var(--ink);margin-bottom:12px;font-weight:700;}
.article-empty p{color:var(--muted);font-size:15px;margin:0 0 22px;}

/* ============ 通用 section ============ */
.section{padding:72px 0;}
.section--alt{background:var(--bg);}
.section-head{max-width:760px;margin-bottom:34px;}
.section-kicker{display:inline-block;font-size:13px;font-weight:600;color:var(--brand);margin-bottom:10px;}
.section-title{font-size:28px;line-height:1.38;color:var(--ink);font-weight:700;margin-bottom:12px;}
.section-desc{margin:0;font-size:15px;color:var(--muted);}

/* 阅读延伸 */
.extend-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.extend-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);
  padding:24px 22px;box-shadow:var(--shadow-1);transition:all .16s ease;
}
.extend-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);}
.extend-card .num{
  display:inline-flex;align-items:center;justify-content:center;
  width:30px;height:30px;border-radius:9px;background:rgba(242,84,45,.10);
  color:var(--brand-dark);font-size:13px;font-weight:700;margin-bottom:14px;
}
.extend-card h3{font-size:18px;color:var(--ink);font-weight:600;margin-bottom:10px;line-height:1.5;}
.extend-card p{margin:0;font-size:14px;color:var(--muted);line-height:1.8;}

/* 核对要点 */
.check-list{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.check-item{
  display:flex;gap:14px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);
  padding:20px 22px;box-shadow:var(--shadow-1);transition:all .16s ease;
}
.check-item:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);}
.check-dot{
  width:10px;height:10px;border-radius:50%;background:var(--mint);flex:0 0 auto;margin-top:9px;
}
.check-item h3{font-size:16px;color:var(--ink);font-weight:600;margin-bottom:6px;}
.check-item p{margin:0;font-size:14px;color:var(--muted);line-height:1.8;}

/* FAQ */
.faq-list{max-width:860px;display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);
  padding:0 20px;box-shadow:var(--shadow-1);transition:box-shadow .16s ease;
}
.faq-item[open]{box-shadow:var(--shadow-2);}
.faq-item summary{
  list-style:none;cursor:pointer;min-height:52px;display:flex;align-items:center;justify-content:space-between;
  gap:16px;font-size:16px;font-weight:600;color:var(--ink);padding:14px 0;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.faq-arrow{
  width:10px;height:10px;border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);
  transform:rotate(45deg);flex:0 0 auto;transition:transform .2s ease;margin-right:4px;
}
.faq-item[open] .faq-arrow{transform:rotate(-135deg);}
.faq-answer{padding:0 0 18px 16px;font-size:15px;color:var(--muted);line-height:1.85;animation:fadeIn .2s ease;}
@keyframes fadeIn{from{opacity:0;}to{opacity:1;}}

/* 下载区 */
.download-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.dl-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);
  padding:26px 22px;display:flex;flex-direction:column;gap:14px;
  box-shadow:var(--shadow-1);transition:all .16s ease;
}
.dl-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);}
.dl-icon{
  width:44px;height:44px;border-radius:12px;background:var(--bg);color:var(--ink);
  display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;
}
.dl-card h3{font-size:17px;color:var(--ink);font-weight:600;}
.dl-card p{margin:0;font-size:13px;color:var(--muted);line-height:1.75;}
.dl-card .btn{margin-top:auto;}

/* 返回条 */
.back-bar{
  background:var(--ink);color:#fff;border-radius:var(--radius-l);
  padding:34px 36px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
}
.back-bar h3{font-size:20px;font-weight:700;color:#fff;margin-bottom:8px;}
.back-bar p{margin:0;font-size:14px;color:rgba(255,255,255,.76);}
.back-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ============ footer ============ */
.site-footer{background:var(--ink);color:rgba(255,255,255,.78);padding:64px 0 28px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-mark{width:34px;height:34px;border-radius:10px;}
.footer-brand strong{color:#fff;font-size:15px;line-height:1.4;}
.footer-desc{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.66);margin:0;max-width:340px;}
.footer-col h4{font-size:14px;color:#fff;font-weight:600;margin-bottom:14px;}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px;}
.footer-col a{font-size:13.5px;color:rgba(255,255,255,.72);}
.footer-col a:hover{color:#FFB49C;text-decoration:none;}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.14);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:rgba(255,255,255,.56);
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .container{padding:0 24px;}
  .nav-menu{gap:18px;}
}
@media (max-width:1023px){
  .nav-menu,.nav-cta{display:none;}
  .nav-toggle{display:flex;}
  .container{padding:0 24px;}
  .section{padding:64px 0;}
  .extend-grid{grid-template-columns:repeat(2,1fr);}
  .download-grid{grid-template-columns:repeat(3,1fr);gap:16px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .article-title{font-size:30px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .brand-name{font-size:14px;}
  .article-hero{padding:20px 0 32px;}
  .article-title{font-size:24px;line-height:1.4;}
  .article-sub{font-size:14px;}
  .breadcrumb .current{max-width:200px;}
  .article-wrap{padding:36px 0 44px;}
  .article-body{font-size:16px;line-height:1.85;}
  .article-body h2{font-size:20px;}
  .article-body h3{font-size:17px;}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap;}
  .section{padding:48px 0;}
  .section-title{font-size:22px;}
  .extend-grid{grid-template-columns:1fr;gap:14px;}
  .check-list{grid-template-columns:1fr;gap:14px;}
  .download-grid{grid-template-columns:1fr;gap:14px;}
  .btn{min-height:44px;}
  .back-bar{padding:26px 22px;border-radius:var(--radius-m);}
  .back-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media (max-width:519px){
  .article-meta{gap:8px;}
  .tag{font-size:11px;}
  .keyword-tags a{height:30px;font-size:12px;padding:0 12px;}
}

/* roulang page: category1 */
:root{
  --ink:#1F2A44;
  --ink-2:#2C395A;
  --brand:#F2542D;
  --brand-dark:#D9431F;
  --mint:#2FB6A0;
  --bg:#F7F5F2;
  --card:#FFFFFF;
  --line:#E6E2DB;
  --text:#3B4356;
  --muted:#6E7689;
  --radius-s:10px;
  --radius-m:16px;
  --radius-l:24px;
  --shadow-1:0 1px 2px rgba(31,42,68,.06);
  --shadow-2:0 8px 24px rgba(31,42,68,.10);
  --shadow-3:0 16px 40px rgba(242,84,45,.14);
  --container:1180px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--card);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding-left:1.2em;}
a{color:var(--brand);text-decoration:none;transition:color .16s ease;}
a:hover{color:var(--brand-dark);text-decoration:underline;}
img{max-width:100%;display:block;height:auto;}
button{font-family:inherit;cursor:pointer;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.container{max-width:var(--container);margin:0 auto;padding:0 32px;}

/* ============ header ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 18px rgba(31,42,68,.08);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:68px;transition:height .2s ease;}
.site-header.is-scrolled .nav-inner{height:58px;}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);min-width:0;}
.brand:hover{text-decoration:none;color:var(--ink);}
.brand-mark{
  width:38px;height:38px;border-radius:11px;background:var(--brand);
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:700;font-size:16px;flex:0 0 auto;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0;}
.brand-name{font-size:15px;font-weight:700;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.brand-sub{font-size:11px;color:var(--muted);white-space:nowrap;}
.nav-menu{display:flex;align-items:center;gap:26px;}
.nav-link{
  position:relative;display:inline-block;padding:6px 0;font-size:15px;color:var(--text);
  white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--brand);
  transition:width .18s ease;
}
.nav-link:hover{color:var(--brand);text-decoration:none;}
.nav-link:hover::after{width:100%;}
.nav-link.active{color:var(--ink);font-weight:600;}
.nav-link.active::after{width:100%;}
.nav-cta{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--radius-s);
  background:#fff;padding:0;align-items:center;justify-content:center;flex-direction:column;gap:5px;
  transition:background .16s ease;
}
.nav-toggle:hover{background:var(--bg);}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);transition:transform .2s ease,opacity .2s 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);}
.drawer{display:none;border-top:1px solid var(--line);background:#fff;}
.drawer.is-open{display:block;}
.drawer-menu{list-style:none;margin:0;padding:8px 0 16px;}
.drawer-menu li{border-bottom:1px solid var(--line);}
.drawer-menu li:last-child{border-bottom:0;}
.drawer-menu a{display:block;padding:12px 32px;min-height:44px;color:var(--ink);font-size:15px;}
.drawer-menu a:hover{background:var(--bg);text-decoration:none;color:var(--brand);}
.drawer-menu a.is-active{color:var(--brand);font-weight:600;}

/* ============ buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-s);font-size:15px;font-weight:600;
  border:1px solid transparent;transition:all .16s ease;text-align:center;line-height:1.4;
}
.btn:hover{text-decoration:none;}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 4px 14px rgba(242,84,45,.22);}
.btn-primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-outline{border-color:var(--ink);color:var(--ink);background:transparent;}
.btn-outline:hover{background:#EFEDE8;color:var(--ink);border-color:var(--ink);}
.btn-light{background:#fff;color:var(--ink);border-color:rgba(255,255,255,.6);}
.btn-light:hover{background:#F2EFE9;color:var(--ink);}
.btn-sm{padding:9px 16px;font-size:14px;}
.btn-block{width:100%;}

/* ============ 分类页头 ============ */
.cat-hero{background:var(--bg);border-bottom:1px solid var(--line);}
.cat-hero-inner{
  display:grid;grid-template-columns:1.4fr .6fr;gap:36px;align-items:center;
  padding:38px 0 46px;
}
.crumb{font-size:13px;color:var(--muted);display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-bottom:14px;}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--brand);text-decoration:none;}
.crumb span.sep{color:#C3BCB0;}
.cat-hero h1{
  font-size:34px;line-height:1.32;font-weight:700;color:var(--ink);letter-spacing:0;
}
.cat-hero .lead{margin-top:14px;font-size:16px;color:var(--text);max-width:640px;}
.hero-facts{
  margin-top:20px;display:flex;flex-wrap:wrap;gap:10px;
}
.fact-pill{
  display:inline-flex;align-items:center;gap:7px;height:32px;padding:0 13px;border-radius:999px;
  background:#fff;border:1px solid var(--line);font-size:13px;color:var(--ink-2);
}
.fact-pill i{width:6px;height:6px;border-radius:50%;background:var(--mint);display:inline-block;}
.cat-hero-media{
  border-radius:var(--radius-m);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow-1);background:#fff;
}
.cat-hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover;}

/* ============ 分类入口条 ============ */
.channel-bar{background:#fff;border-bottom:1px solid var(--line);padding:14px 0;}
.channel-track{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;padding:2px;}
.channel-track::-webkit-scrollbar{display:none;}
.chip{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:999px;
  background:#fff;border:1px solid var(--line);color:var(--text);font-size:14px;
  white-space:nowrap;transition:all .15s ease;flex:0 0 auto;
}
.chip:hover{background:#EFEDE7;color:var(--ink);text-decoration:none;border-color:#D9D4CB;}
.chip.is-active{background:var(--brand);color:#fff;border-color:var(--brand);box-shadow:inset 0 0 0 2px rgba(255,255,255,.4);}
.chip.is-active:hover{background:var(--brand-dark);color:#fff;}
.channel-note{font-size:13px;color:var(--muted);margin-top:10px;}

/* ============ section 基础 ============ */
.section{padding:80px 0;}
.section--alt{background:var(--bg);}
.section-head{max-width:760px;margin-bottom:34px;}
.section-head h2{font-size:29px;line-height:1.36;color:var(--ink);font-weight:700;}
.section-head p{margin-top:12px;color:var(--muted);font-size:15px;}
.eyebrow{
  display:inline-block;font-size:12px;letter-spacing:.06em;color:var(--brand);
  font-weight:700;margin-bottom:10px;text-transform:uppercase;
}

/* ============ 列表主体 ============ */
.cat-layout{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:32px;align-items:start;}
.cat-list{display:flex;flex-direction:column;gap:16px;}
.cat-item{
  position:relative;display:block;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-m);padding:20px 22px 20px 26px;box-shadow:var(--shadow-1);
  transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease;
  overflow:hidden;color:inherit;
}
.cat-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--brand);
  opacity:.85;
}
.cat-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);text-decoration:none;border-color:#DCD6CC;}
.cat-item:hover .cat-item-title{color:var(--brand);}
.tag{
  display:inline-block;font-size:12px;line-height:1.6;padding:1px 9px;border-radius:6px;
  background:#FDECE7;color:var(--brand-dark);font-weight:600;
}
.cat-item-title{
  margin-top:10px;font-size:18px;line-height:1.55;font-weight:600;color:var(--ink);
  transition:color .16s ease;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.cat-item-desc{
  margin-top:8px;font-size:14px;color:var(--muted);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.cat-item-meta{display:block;margin-top:12px;font-size:12px;color:#9AA1B0;}
.empty-box{
  background:#fff;border:1px dashed #D6D0C6;border-radius:var(--radius-m);
  padding:52px 24px;text-align:center;color:var(--muted);
}
.empty-box .empty-icon{
  width:52px;height:52px;border-radius:14px;background:var(--bg);border:1px solid var(--line);
  margin:0 auto 14px;display:flex;align-items:center;justify-content:center;
  color:#BDB6AA;font-size:20px;
}
.empty-box p{font-size:14px;}

/* ============ 侧栏 ============ */
.side{display:flex;flex-direction:column;gap:20px;}
.side-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);
  padding:22px;box-shadow:var(--shadow-1);
}
.side-card h3{font-size:16px;color:var(--ink);font-weight:700;}
.side-card .side-sub{font-size:13px;color:var(--muted);margin-top:6px;}
.time-list{list-style:none;margin:16px 0 0;padding:0;}
.time-list li{
  display:flex;gap:12px;padding:11px 0;border-bottom:1px dashed var(--line);font-size:14px;
}
.time-list li:last-child{border-bottom:0;padding-bottom:0;}
.time-list .t{
  flex:0 0 96px;color:var(--ink);font-weight:600;font-variant-numeric:tabular-nums;
}
.time-list .d{color:var(--muted);line-height:1.7;}
.side-dl{display:flex;flex-direction:column;gap:10px;margin-top:16px;}
.dl-btn{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  border:1px solid var(--line);border-radius:var(--radius-s);padding:11px 14px;
  background:#fff;color:var(--ink);font-size:14px;font-weight:600;
  transition:all .16s ease;
}
.dl-btn span.type{font-size:12px;color:var(--muted);font-weight:400;}
.dl-btn:hover, .dl-btn:focus-visible{
  background:var(--brand);border-color:var(--brand);color:#fff;text-decoration:none;
  transform:translateY(-1px);box-shadow:0 8px 20px rgba(242,84,45,.20);
}
.dl-btn:hover span.type{color:rgba(255,255,255,.82);}
.check-list{list-style:none;margin:14px 0 0;padding:0;}
.check-list li{
  position:relative;padding-left:22px;font-size:14px;color:var(--muted);margin-bottom:10px;line-height:1.75;
}
.check-list li::before{
  content:"";position:absolute;left:0;top:9px;width:10px;height:10px;border-radius:3px;
  background:var(--mint);opacity:.85;
}
.check-list li:last-child{margin-bottom:0;}

/* ============ 要点速览 ============ */
.point-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.point-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);
  padding:24px;box-shadow:var(--shadow-1);transition:transform .16s ease,box-shadow .16s ease;
}
.point-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);}
.point-card .idx{
  display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;
  border-radius:9px;background:var(--bg);color:var(--brand);font-size:13px;font-weight:700;
  margin-bottom:12px;
}
.point-card h3{font-size:17px;color:var(--ink);font-weight:600;}
.point-card p{margin-top:8px;font-size:14px;color:var(--muted);}

/* ============ 专题卡 ============ */
.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.topic-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);overflow:hidden;
  box-shadow:var(--shadow-1);display:flex;flex-direction:column;
  transition:transform .16s ease,box-shadow .16s ease;
}
.topic-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);}
.topic-card img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.topic-body{padding:20px;}
.topic-body h3{font-size:17px;color:var(--ink);font-weight:600;line-height:1.55;}
.topic-body p{margin-top:8px;font-size:14px;color:var(--muted);}

/* ============ FAQ ============ */
.faq-wrap{max-width:860px;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);
  margin-bottom:12px;overflow:hidden;transition:box-shadow .16s ease;
}
.faq-item[open]{box-shadow:var(--shadow-2);}
.faq-item summary{
  list-style:none;cursor:pointer;min-height:52px;display:flex;align-items:center;justify-content:space-between;
  gap:14px;padding:15px 20px;font-size:16px;font-weight:600;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"";flex:0 0 auto;width:9px;height:9px;border-right:2px solid var(--muted);
  border-bottom:2px solid var(--muted);transform:rotate(45deg) translateY(-2px);
  transition:transform .2s ease;
}
.faq-item[open] summary::after{transform:rotate(-135deg) translateY(-2px);border-color:var(--brand);}
.faq-item summary:hover{color:var(--brand);}
.faq-body{
  padding:0 20px 18px 20px;font-size:15px;color:var(--muted);line-height:1.85;
  animation:fadeIn .2s ease;
}
@keyframes fadeIn{from{opacity:0;transform:translateY(-4px);}to{opacity:1;transform:none;}}

/* ============ 提示条 / CTA ============ */
.hint-band{
  background:var(--bg);border:1px solid var(--line);border-radius:var(--radius-l);
  padding:32px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;
}
.hint-band .hint-text{max-width:680px;}
.hint-band h2{font-size:22px;color:var(--ink);font-weight:700;}
.hint-band p{margin-top:8px;font-size:14px;color:var(--muted);}
.cta-band{
  background:var(--ink);color:#fff;border-radius:var(--radius-l);padding:38px;
  display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center;
}
.cta-band h2{font-size:26px;color:#fff;font-weight:700;line-height:1.4;}
.cta-band p{margin-top:10px;font-size:14px;color:rgba(255,255,255,.76);max-width:640px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
.link-plain{color:#fff;text-decoration:underline;font-size:14px;align-self:center;}
.link-plain:hover{color:#FFC9B8;}

/* ============ footer ============ */
.site-footer{background:var(--ink);color:#fff;padding:56px 0 24px;}
.site-footer a{color:#D9DDE7;}
.site-footer a:hover{color:#FFC9B8;text-decoration:none;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-mark{background:var(--brand);border-radius:11px;width:34px;height:34px;font-size:15px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;flex:0 0 auto;}
.footer-brand strong{font-size:15px;color:#fff;line-height:1.5;font-weight:700;}
.footer-desc{font-size:13px;color:rgba(255,255,255,.66);line-height:1.8;max-width:340px;}
.footer-col h4{font-size:14px;color:#fff;font-weight:600;margin-bottom:14px;letter-spacing:0;}
.footer-col ul{list-style:none;margin:0;padding:0;}
.footer-col li{margin-bottom:10px;font-size:13px;}
.footer-bottom{
  margin-top:38px;padding-top:20px;border-top:1px solid rgba(255,255,255,.14);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:12px;color:rgba(255,255,255,.55);
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .container{padding:0 24px;}
  .nav-menu{gap:20px;}
  .nav-link{font-size:14px;}
}
@media (max-width:991px){
  .nav-menu{display:none;}
  .nav-toggle{display:flex;}
  .brand-name{font-size:14px;max-width:240px;}
  .cat-hero-inner{grid-template-columns:1fr;gap:24px;padding:30px 0 36px;}
  .cat-hero-media{max-width:520px;}
  .cat-layout{grid-template-columns:1fr;gap:26px;}
  .topic-grid{grid-template-columns:repeat(2,1fr);}
  .cta-band{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px;}
  .section{padding:64px 0;}
  .cat-hero h1{font-size:29px;}
  .section-head h2{font-size:25px;}
}
@media (max-width:767px){
  body{font-size:15px;}
  .container{padding:0 16px;}
  .brand-sub{display:none;}
  .brand-name{max-width:180px;font-size:13px;}
  .cat-hero h1{font-size:24px;line-height:1.4;}
  .cat-hero .lead{font-size:15px;}
  .section{padding:48px 0;}
  .section-head h2{font-size:22px;}
  .point-grid{grid-template-columns:1fr;gap:14px;}
  .topic-grid{grid-template-columns:1fr;}
  .cat-item{padding:18px 16px 18px 20px;}
  .cat-item-title{font-size:16px;}
  .hint-band{padding:24px;border-radius:var(--radius-m);}
  .cta-band{padding:26px;border-radius:var(--radius-m);}
  .cta-band h2{font-size:21px;}
  .btn{min-height:44px;}
  .footer-grid{grid-template-columns:1fr;}
  .time-list li{flex-wrap:wrap;gap:4px;}
  .time-list .t{flex:0 0 auto;}
  .drawer-menu a{padding:12px 16px;}
}
@media (max-width:520px){
  .hero-facts{gap:8px;}
  .fact-pill{font-size:12px;height:30px;padding:0 11px;}
  .nav-cta .btn-sm{padding:8px 12px;font-size:13px;}
  .brand-name{max-width:140px;}
}