/* roulang page: index */
/* ===================== 设计变量 ===================== */
:root{
  --brand:#1657C8;
  --brand-700:#0F46A8;
  --brand-50:#EDF3FE;
  --accent:#FF7A45;
  --accent-700:#E8622C;
  --teal:#12B0A0;
  --ink:#0E1726;
  --ink-2:#4A5568;
  --ink-3:#8A94A6;
  --bg:#F5F7FB;
  --surface:#FFFFFF;
  --line:#E4E9F2;
  --footer:#0E1726;
  --radius-lg:16px;
  --radius-md:12px;
  --radius-sm:10px;
  --shadow-card:0 1px 2px rgba(14,23,38,.05), 0 12px 30px -14px rgba(14,23,38,.14);
  --shadow-hover:0 22px 44px -18px rgba(22,87,200,.22);
  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ===================== Reset / Base ===================== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius-md)}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p,figure{margin:0}
:focus-visible{outline:2px solid rgba(22,87,200,.35);outline-offset:2px;border-radius:8px}
.num{font-family:"Inter",system-ui,-apple-system,sans-serif;letter-spacing:-.02em;font-variant-numeric:tabular-nums}

/* ===================== 布局容器 ===================== */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section--surface{background:var(--surface)}
.section--tight{padding:64px 0}

.section-head{max-width:760px;margin:0 auto 44px;text-align:center}
.section-head--left{margin-left:0;text-align:left}
.section-head h2{font-size:32px;line-height:1.32;font-weight:700;margin-top:16px;letter-spacing:0}
.section-head p{margin-top:12px;color:var(--ink-2);font-size:16px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:var(--brand-50);color:var(--brand-700);
  font-size:13px;font-weight:600;letter-spacing:.02em;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand)}

/* ===================== 按钮 ===================== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-md);
  font-size:15px;font-weight:600;border:1.5px solid transparent;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background-color .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease);
  white-space:nowrap;
}
.btn--primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px -12px rgba(22,87,200,.6)}
.btn--primary:hover{background:var(--brand-700);transform:translateY(-2px);box-shadow:0 16px 32px -14px rgba(22,87,200,.55)}
.btn--ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn--ghost:hover{border-color:var(--brand);background:var(--brand-50);color:var(--brand-700);transform:translateY(-2px)}
.btn--accent{background:var(--accent);color:#fff;border-radius:999px;box-shadow:0 10px 24px -12px rgba(255,122,69,.7)}
.btn--accent:hover{background:var(--accent-700);transform:translateY(-2px) scale(1.02)}
.btn--lg{height:56px;padding:0 32px;font-size:16px}
.btn--block{width:100%}
.btn:active{transform:translateY(1px)}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}

/* ===================== 徽章 ===================== */
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;font-size:13px;font-weight:600;line-height:1.65}
.badge--brand{background:var(--brand-50);color:var(--brand-700)}
.badge--teal{background:rgba(18,176,160,.12);color:#0B8478}
.badge--accent{background:rgba(255,122,69,.14);color:var(--accent-700)}

/* ===================== 导航 ===================== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:76px;display:flex;align-items:center;
  background:rgba(255,255,255,.55);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  backdrop-filter:blur(14px) saturate(160%);
  border-bottom:1px solid rgba(255,255,255,.6);
  box-shadow:0 8px 24px -16px rgba(14,23,38,.25);
  transition:height .3s var(--ease),background-color .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.site-header.is-scrolled{height:62px;background:#fff;border-bottom-color:var(--line);box-shadow:0 10px 30px -20px rgba(14,23,38,.4)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;width:100%}

.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo__mark{
  width:38px;height:38px;border-radius:11px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--brand),var(--brand-700));
  color:#fff;font-size:17px;font-weight:700;
  box-shadow:0 8px 18px -10px rgba(22,87,200,.8);
}
.logo__text{display:flex;flex-direction:column;line-height:1.15}
.logo__main{font-size:16px;font-weight:700;color:var(--ink);letter-spacing:.02em}
.logo__sub{font-size:12px;color:var(--ink-3);font-weight:500;letter-spacing:.04em}

.main-nav{display:flex;align-items:center;gap:6px}
.nav-link{
  position:relative;padding:8px 14px;font-size:15px;font-weight:500;color:var(--ink-2);
  border-radius:var(--radius-sm);transition:color .22s var(--ease),background-color .22s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .25s var(--ease);
}
.nav-link:hover{color:var(--brand);background:var(--brand-50)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{transform:scaleX(1)}

.header-actions{display:flex;align-items:center;gap:12px}
.hamburger{
  display:none;width:44px;height:44px;border-radius:var(--radius-sm);
  border:1px solid var(--line);background:#fff;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
  transition:border-color .22s var(--ease),background-color .22s var(--ease);
}
.hamburger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:transform .25s var(--ease),opacity .25s var(--ease)}
.hamburger:hover{border-color:var(--brand);background:var(--brand-50)}
.hamburger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.is-open span:nth-child(2){opacity:0}
.hamburger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* 移动端抽屉 */
.drawer{
  position:fixed;inset:0;z-index:120;background:#fff;
  display:flex;flex-direction:column;padding:20px 22px 28px;
  transform:translateY(-100%);transition:transform .35s var(--ease);
}
.drawer.is-open{transform:translateY(0)}
.drawer__top{display:flex;align-items:center;justify-content:space-between;padding-bottom:18px;border-bottom:1px solid var(--line)}
.drawer__close{width:42px;height:42px;border-radius:var(--radius-sm);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:20px;color:var(--ink-2);
  transition:border-color .22s var(--ease),color .22s var(--ease)}
.drawer__close:hover{border-color:var(--brand);color:var(--brand)}
.drawer__nav{display:flex;flex-direction:column;gap:4px;margin-top:26px}
.drawer__link{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 4px;font-size:17px;font-weight:600;color:var(--ink);
  border-bottom:1px solid var(--line);transition:color .22s var(--ease),padding-left .22s var(--ease);
}
.drawer__link:hover,.drawer__link.is-active{color:var(--brand);padding-left:10px}
.drawer__bottom{margin-top:auto;padding-top:22px;display:flex;flex-direction:column;gap:12px}
.drawer__note{font-size:13px;color:var(--ink-3);text-align:center}

/* ===================== Hero ===================== */
.hero{position:relative;overflow:hidden;background:var(--bg);padding:132px 0 76px}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;opacity:.07;
}
.hero::after{
  content:"";position:absolute;top:-160px;right:-180px;width:600px;height:600px;pointer-events:none;
  background:linear-gradient(135deg,rgba(22,87,200,.09),rgba(18,176,160,.05));
  border-radius:80px;transform:rotate(45deg);
}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{font-size:48px;line-height:1.18;font-weight:800;letter-spacing:-.01em}
.hero h1 .hl{color:var(--brand)}
.hero-sub{margin-top:20px;font-size:17px;line-height:1.8;color:var(--ink-2);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-trust{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
.trust-item{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;border-radius:999px;background:#fff;border:1px solid var(--line);
  font-size:13px;color:var(--ink-2);box-shadow:0 4px 14px -10px rgba(14,23,38,.4);
}
.trust-item strong{color:var(--ink);font-weight:700}

.hero-visual{position:relative;display:flex;justify-content:center}
.phone{
  position:relative;width:282px;aspect-ratio:9/18.6;
  background:#0E1726;border-radius:38px;padding:11px;
  box-shadow:0 46px 90px -44px rgba(14,23,38,.6),0 0 0 1px rgba(255,255,255,.5) inset;
}
.phone__screen{width:100%;height:100%;object-fit:cover;border-radius:28px}
.phone__notch{
  position:absolute;top:20px;left:50%;transform:translateX(-50%);
  width:88px;height:8px;border-radius:999px;background:rgba(255,255,255,.22);z-index:3;
}
.hero-float{
  position:absolute;left:-8px;bottom:44px;
  background:#fff;border:1px solid var(--line);border-radius:14px;
  padding:14px 18px;box-shadow:0 20px 44px -24px rgba(14,23,38,.45);
  display:flex;flex-direction:column;gap:2px;
}
.hero-float strong{font-size:22px;font-weight:700;color:var(--brand)}
.hero-float span{font-size:12px;color:var(--ink-3)}
.hero-float--top{left:auto;right:-6px;top:56px;bottom:auto}

/* ===================== 价值区 ===================== */
.value-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:24px;box-shadow:var(--shadow-card);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(22,87,200,.28)}
.card__icon{
  width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  background:var(--brand-50);color:var(--brand);font-size:20px;font-weight:700;margin-bottom:16px;
}
.card__icon--teal{background:rgba(18,176,160,.12);color:#0B8478}
.card__icon--accent{background:rgba(255,122,69,.14);color:var(--accent-700)}
.card h3{font-size:19px;font-weight:600;line-height:1.45}
.card p{margin-top:10px;font-size:15px;color:var(--ink-2);line-height:1.75}
.value-main{grid-column:span 7;grid-row:span 2;padding:32px;display:flex;flex-direction:column}
.value-main h3{font-size:24px}
.value-main p{margin-top:12px}
.value-shot{margin-top:22px;border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--line);background:#F0F3F9}
.value-shot img{width:100%;height:280px;object-fit:cover;border-radius:0}
.value-side{grid-column:span 5}
.value-row{grid-column:span 5;display:grid;gap:24px;grid-template-columns:1fr 1fr}
.value-row .card p{font-size:14px}

/* ===================== 轮播 ===================== */
.carousel{position:relative}
.carousel__track{
  display:flex;gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:8px 4px 22px;margin:0 -4px;
  scrollbar-width:none;
}
.carousel__track::-webkit-scrollbar{display:none}
.carousel__card{
  flex:0 0 348px;scroll-snap-align:start;
  background:var(--surface);border:1px solid var(--line);border-radius:18px;overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.carousel__card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(22,87,200,.32)}
.carousel__card.is-current{border-color:var(--brand)}
.carousel__thumb{aspect-ratio:16/10;background:#EFF3FA;overflow:hidden}
.carousel__thumb img{width:100%;height:100%;object-fit:cover;border-radius:0}
.carousel__body{padding:20px 22px 24px}
.carousel__body h3{font-size:18px;font-weight:600}
.carousel__body p{margin-top:8px;font-size:14px;color:var(--ink-2);line-height:1.7}
.carousel__controls{display:flex;align-items:center;justify-content:space-between;margin-top:6px}
.carousel__dots{display:flex;gap:8px}
.carousel__dot{width:8px;height:8px;border-radius:999px;background:var(--line);transition:width .25s var(--ease),background-color .25s var(--ease)}
.carousel__dot.is-active{width:24px;background:var(--brand)}
.carousel__arrows{display:flex;gap:10px}
.arrow-btn{
  width:42px;height:42px;border-radius:999px;border:1px solid var(--line);background:#fff;
  display:flex;align-items:center;justify-content:center;color:var(--ink-2);font-size:16px;
  transition:border-color .22s var(--ease),background-color .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
}
.arrow-btn:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-50);transform:translateY(-2px)}

/* ===================== 系统要求 ===================== */
.req-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.req-card{padding:30px}
.req-card__head{display:flex;align-items:center;gap:14px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.req-card__head h3{font-size:20px;font-weight:600}
.req-card__head span{font-size:13px;color:var(--ink-3)}
.spec-list{margin-top:8px}
.spec-item{
  display:flex;align-items:flex-start;justify-content:space-between;gap:20px;
  padding:14px 0;border-bottom:1px dashed var(--line);
}
.spec-item:last-child{border-bottom:0}
.spec-item .label{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--ink-2)}
.dot{width:8px;height:8px;border-radius:50%;background:var(--teal);flex-shrink:0}
.dot--gray{background:var(--ink-3);opacity:.45}
.spec-item .value{font-size:14px;font-weight:600;color:var(--ink);text-align:right}

/* ===================== 评价墙 ===================== */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.review-card{padding:26px}
.review-card:nth-child(2){margin-top:34px}
.review-card:nth-child(3){margin-top:68px}
.review-head{display:flex;align-items:center;gap:12px}
.avatar{
  width:44px;height:44px;border-radius:50%;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-50);color:var(--brand);font-weight:700;font-size:17px;
}
.avatar--teal{background:rgba(18,176,160,.13);color:#0B8478}
.avatar--accent{background:rgba(255,122,69,.14);color:var(--accent-700)}
.review-name{font-size:15px;font-weight:600}
.stars{margin-top:2px;font-size:13px;color:var(--accent);letter-spacing:2px}
.review-card p{margin-top:16px;font-size:15px;color:var(--ink-2);line-height:1.78}
.review-meta{margin-top:16px;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--ink-3)}

/* ===================== 下载区 ===================== */
.download-card{
  background:var(--brand-50);border-radius:20px;padding:52px 40px;text-align:center;
  border:1px solid rgba(22,87,200,.12);
}
.download-card h2{font-size:30px;font-weight:700;line-height:1.35}
.download-card > p{margin-top:14px;color:var(--ink-2);font-size:16px;max-width:680px;margin-left:auto;margin-right:auto}
.download-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:16px;margin-top:30px}
.download-note{margin-top:22px;font-size:13px;color:var(--ink-3);display:flex;flex-wrap:wrap;justify-content:center;gap:18px}
.download-note span{display:inline-flex;align-items:center;gap:6px}

/* ===================== CMS 最新信息 ===================== */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
.news-head h2{font-size:32px;font-weight:700;line-height:1.3;margin-top:16px}
.more-link{font-size:15px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px;transition:gap .22s var(--ease),color .22s var(--ease)}
.more-link:hover{gap:12px;color:var(--brand-700)}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;box-shadow:var(--shadow-card);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(22,87,200,.28)}
.news-card__link{display:block;height:100%}
.news-card__thumb{aspect-ratio:16/10;background:#EFF3FA;overflow:hidden}
.news-card__thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .4s var(--ease)}
.news-card:hover .news-card__thumb img{transform:scale(1.04)}
.news-card__body{padding:20px 22px 24px}
.news-card__title{
  margin-top:12px;font-size:17px;font-weight:600;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .22s var(--ease);
}
.news-card:hover .news-card__title{color:var(--brand)}
.news-card__excerpt{
  margin-top:10px;font-size:14px;color:var(--ink-2);line-height:1.72;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card__meta{margin-top:16px;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--ink-3)}

.empty-state{
  border:1.5px dashed var(--line);border-radius:var(--radius-lg);
  padding:56px 24px;text-align:center;background:var(--surface);
}
.empty-state__icon{
  width:56px;height:56px;border-radius:16px;margin:0 auto 16px;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-50);color:var(--brand);font-size:22px;
}
.empty-state p{color:var(--ink-2);font-size:15px}
.empty-state .btn{margin-top:20px}

/* ===================== FAQ ===================== */
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  margin-bottom:14px;overflow:hidden;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.faq-item:hover{border-color:rgba(22,87,200,.3)}
.faq-item.is-open{border-color:rgba(22,87,200,.4);box-shadow:var(--shadow-card)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 24px;text-align:left;font-size:16.5px;font-weight:600;color:var(--ink);
  transition:color .22s var(--ease);
}
.faq-q:hover{color:var(--brand)}
.faq-icon{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;font-size:15px;color:var(--brand);
  transition:transform .28s var(--ease),background-color .28s var(--ease),border-color .28s var(--ease);
}
.faq-item.is-open .faq-icon{transform:rotate(45deg);background:var(--brand);color:#fff;border-color:var(--brand)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s var(--ease)}
.faq-a__inner{padding:0 24px 24px;font-size:15px;color:var(--ink-2);line-height:1.82}

/* ===================== 结尾 CTA ===================== */
.cta-band{
  position:relative;overflow:hidden;border-radius:20px;
  background:linear-gradient(120deg,#0F46A8,#1657C8 58%,#1C6AD9);
  padding:56px 48px;display:flex;align-items:center;justify-content:space-between;gap:32px;
  box-shadow:0 30px 60px -34px rgba(15,70,168,.7);
}
.cta-band::after{
  content:"";position:absolute;right:-90px;bottom:-120px;width:340px;height:340px;
  background:rgba(255,255,255,.07);border-radius:60px;transform:rotate(45deg);
}
.cta-band__text{position:relative;z-index:2;color:#fff;max-width:660px}
.cta-band__text h2{font-size:28px;font-weight:700;line-height:1.35}
.cta-band__text p{margin-top:12px;font-size:15px;color:rgba(255,255,255,.82);line-height:1.75}
.cta-band__actions{position:relative;z-index:2;display:flex;gap:14px;flex-wrap:wrap}
.cta-band .btn--ghost{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.35);color:#fff}
.cta-band .btn--ghost:hover{background:rgba(255,255,255,.2);border-color:#fff;color:#fff}

/* ===================== 页脚 ===================== */
.site-footer{background:var(--footer);color:rgba(255,255,255,.72);padding:72px 0 0;margin-top:88px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand .logo__main{color:#fff}
.footer-brand .logo__sub{color:rgba(255,255,255,.55)}
.footer-brand p{margin-top:18px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:320px}
.footer-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.footer-badges span{
  padding:5px 12px;border-radius:999px;font-size:12px;font-weight:600;
  background:rgba(255,255,255,.08);color:rgba(255,255,255,.78);border:1px solid rgba(255,255,255,.12);
}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:18px}
.footer-col li{margin-bottom:12px}
.footer-col a{
  font-size:14px;color:rgba(255,255,255,.72);display:inline-block;
  transition:color .22s var(--ease),transform .22s var(--ease);
}
.footer-col a:hover{color:#fff;transform:translateX(4px)}
.footer-bottom{
  margin-top:56px;padding:24px 0;border-top:1px solid rgba(255,255,255,.12);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom span{line-height:1.7}

/* ===================== 移动端吸底下载条 ===================== */
.sticky-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:80;
  display:none;align-items:center;gap:14px;
  padding:10px 18px calc(10px + env(safe-area-inset-bottom));
  background:rgba(255,255,255,.94);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border-top:1px solid var(--line);
  box-shadow:0 -10px 30px -20px rgba(14,23,38,.4);
}
.sticky-bar__info{display:flex;flex-direction:column;line-height:1.3;min-width:0}
.sticky-bar__info strong{font-size:14px;font-weight:700;color:var(--ink)}
.sticky-bar__info span{font-size:12px;color:var(--ink-3)}
.sticky-bar .btn{flex:1;height:44px;font-size:15px}

/* ===================== 响应式 ===================== */
@media (max-width:1279px){
  .hero h1{font-size:42px}
}
@media (max-width:1023px){
  .section{padding:68px 0}
  .hero{padding:124px 0 64px}
  .hero-inner{grid-template-columns:1fr;gap:48px}
  .hero h1{font-size:38px}
  .hero-sub{max-width:none}
  .hero-visual{order:2}
  .value-grid{grid-template-columns:repeat(2,1fr)}
  .value-main,.value-side,.value-row{grid-column:span 2;grid-row:auto}
  .value-row{grid-template-columns:1fr 1fr}
  .review-grid{grid-template-columns:1fr 1fr}
  .review-card:nth-child(3){margin-top:0}
  .news-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .section-head h2,.news-head h2{font-size:27px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .section{padding:56px 0}
  .main-nav{display:none}
  .header-actions .btn--accent{display:none}
  .hamburger{display:flex}
  .hero{padding:112px 0 52px}
  .hero h1{font-size:32px}
  .hero-sub{font-size:15.5px}
  .hero-actions .btn{flex:1 1 auto}
  .phone{width:240px}
  .hero-float{left:-4px;bottom:26px;padding:12px 14px}
  .hero-float--top{display:none}
  .value-grid{grid-template-columns:1fr}
  .value-main,.value-side,.value-row{grid-column:span 1}
  .value-row{grid-template-columns:1fr}
  .value-shot img{height:200px}
  .req-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .review-card:nth-child(2),.review-card:nth-child(3){margin-top:0}
  .news-grid{grid-template-columns:1fr}
  .news-head{flex-direction:column;align-items:flex-start;gap:14px}
  .carousel__card{flex:0 0 78%}
  .carousel__arrows{display:none}
  .download-card{padding:38px 22px}
  .download-card h2{font-size:24px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:40px 26px}
  .cta-band__text h2{font-size:23px}
  .cta-band__actions{width:100%}
  .cta-band__actions .btn{flex:1 1 100%}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .sticky-bar{display:flex}
  body{padding-bottom:74px}
  .section-head h2,.news-head h2{font-size:24px}
  .faq-q{font-size:15.5px;padding:18px 18px}
  .faq-a__inner{padding:0 18px 20px}
}
@media (max-width:419px){
  .hero h1{font-size:27px}
  .section-head h2,.news-head h2{font-size:22px}
  .hero-actions .btn{flex:1 1 100%}
  .btn{height:46px;padding:0 18px}
  .phone{width:206px}
  .review-card{padding:20px}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important;scroll-behavior:auto !important}
}

/* roulang page: article */
:root{
  --brand:#1657C8;
  --brand-700:#0F46A8;
  --brand-50:#EDF3FE;
  --accent:#FF7A45;
  --accent-700:#E8622C;
  --accent-50:#FFF1EA;
  --teal:#12B0A0;
  --teal-50:#E7F7F4;
  --ink:#0E1726;
  --ink-2:#4A5568;
  --ink-3:#8A94A6;
  --bg:#F5F7FB;
  --surface:#FFFFFF;
  --line:#E4E9F2;
  --footer:#0E1726;
  --radius-lg:18px;
  --radius:16px;
  --radius-sm:12px;
  --shadow-card:0 1px 2px rgba(14,23,38,.05), 0 12px 30px -14px rgba(14,23,38,.14);
  --shadow-hover:0 22px 44px -18px rgba(22,87,200,.22);
  --shadow-nav:0 8px 24px -16px rgba(14,23,38,.25);
  --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-num:"Inter",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--ink);
  background:var(--bg);
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
input{font-family:inherit}
::selection{background:rgba(22,87,200,.16)}

.container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%}
@media(max-width:767px){.container{padding:0 18px}}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  height:76px;
  display:flex;
  align-items:center;
  background:rgba(255,255,255,.55);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  backdrop-filter:blur(14px) saturate(160%);
  border-bottom:1px solid rgba(255,255,255,.6);
  box-shadow:var(--shadow-nav);
  transition:height .3s ease, background .3s ease, border-color .3s ease, box-shadow .3s ease;
}
.site-header.is-scrolled{
  height:60px;
  background:#FFFFFF;
  border-bottom:1px solid var(--line);
  box-shadow:0 8px 24px -18px rgba(14,23,38,.35);
}
.nav-inner{display:flex;align-items:center;gap:28px;width:100%}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo__mark{
  width:36px;height:36px;border-radius:10px;
  background:linear-gradient(140deg,var(--brand),var(--brand-700));
  color:#fff;font-size:17px;font-weight:800;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 18px -10px rgba(22,87,200,.65);
}
.logo__text{display:flex;flex-direction:column;line-height:1.15}
.logo__main{font-size:16px;font-weight:800;letter-spacing:.02em;color:var(--ink)}
.logo__sub{font-size:11px;color:var(--ink-3);letter-spacing:.14em}

.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-link{
  position:relative;
  padding:8px 12px;
  font-size:15px;
  font-weight:500;
  color:var(--ink-2);
  border-radius:8px;
  transition:color .2s ease;
}
.nav-link::after{
  content:"";
  position:absolute;left:12px;right:12px;bottom:3px;height:2px;
  background:var(--brand);border-radius:2px;
  transform:scaleX(0);transform-origin:left;
  transition:transform .25s cubic-bezier(.2,.7,.3,1);
}
.nav-link:hover{color:var(--brand)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{transform:scaleX(1)}

.nav-tools{display:flex;align-items:center;gap:12px}
.icon-btn{
  width:40px;height:40px;border-radius:50%;
  border:1px solid var(--line);background:#fff;
  color:var(--ink-2);display:flex;align-items:center;justify-content:center;
  cursor:pointer;transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.icon-btn:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-50)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:none;cursor:pointer;
  font-size:15px;font-weight:600;
  padding:12px 22px;border-radius:999px;
  transition:transform .25s cubic-bezier(.2,.7,.3,1), background .25s ease, box-shadow .25s ease, color .25s ease, border-color .25s ease;
}
.btn:focus-visible{outline:2px solid rgba(22,87,200,.35);outline-offset:2px}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 12px 24px -14px rgba(22,87,200,.75)}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-2px);box-shadow:0 18px 30px -14px rgba(22,87,200,.6)}
.btn-download{background:var(--accent);color:#fff;box-shadow:0 12px 24px -14px rgba(255,122,69,.8)}
.btn-download:hover{background:var(--accent-700);transform:translateY(-2px) scale(1.02)}
.btn-ghost{background:#fff;color:var(--ink);border:1.5px solid var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-50)}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-block{width:100%}

.hamburger{display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:#fff;cursor:pointer;align-items:center;justify-content:center}
.hamburger span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative}
.hamburger span::before,.hamburger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px}
.hamburger span::before{top:-6px}
.hamburger span::after{top:6px}

.mobile-drawer{
  position:fixed;inset:0;z-index:80;
  background:#fff;
  display:none;
  flex-direction:column;
  padding:0 20px 96px;
}
.mobile-drawer.is-open{display:flex}
.drawer-top{height:64px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}
.drawer-close{width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:#fff;font-size:20px;color:var(--ink-2);cursor:pointer;line-height:1}
.drawer-links{display:flex;flex-direction:column;padding-top:18px;gap:4px}
.drawer-links a{font-size:17px;font-weight:600;color:var(--ink);padding:14px 4px;border-bottom:1px solid var(--line)}
.drawer-bottom{position:fixed;left:0;right:0;bottom:0;padding:14px 20px 22px;background:#fff;border-top:1px solid var(--line)}

/* ============ 面包屑 ============ */
.crumb-bar{padding:26px 0 0}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--ink-3)}
.crumb a{color:var(--ink-3);transition:color .2s ease}
.crumb a:hover{color:var(--brand)}
.crumb .sep{width:14px;height:1px;background:var(--line);display:inline-block}
.crumb .current{color:var(--ink-2);max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ============ 文章头 ============ */
.article-head{padding:22px 0 30px;border-bottom:1px solid var(--line);margin-bottom:36px}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  font-size:13px;font-weight:600;line-height:1.5;
}
.badge-brand{background:var(--brand-50);color:var(--brand)}
.badge-teal{background:var(--teal-50);color:#0B8578}
.badge-accent{background:var(--accent-50);color:var(--accent-700)}
.article-title{font-size:42px;font-weight:800;line-height:1.22;letter-spacing:-.01em;margin:16px 0 16px;max-width:900px}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:16px;font-size:13px;color:var(--ink-3)}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--line)}
.article-meta strong{color:var(--ink-2);font-weight:600}

/* ============ 布局 ============ */
.layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 260px;
  gap:56px;
  align-items:start;
  padding-bottom:64px;
}
.article-body{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);
  padding:44px 48px;
  max-width:880px;
  width:100%;
}
.reading{max-width:760px;font-size:17px;line-height:1.85;letter-spacing:.01em;color:#1B2537}
.reading > * + *{margin-top:22px}
.reading p{margin:0}
.reading h2{
  position:relative;
  font-size:26px;font-weight:700;line-height:1.4;
  padding-left:16px;margin-top:40px;color:var(--ink);
}
.reading h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:4px;background:var(--brand)}
.reading h3{font-size:20px;font-weight:600;margin-top:32px;color:var(--ink)}
.reading ul,.reading ol{padding-left:22px}
.reading ul{list-style:none}
.reading ul li{position:relative;padding-left:18px;margin-top:10px}
.reading ul li::before{content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:50%;background:var(--teal)}
.reading ol{list-style:decimal}
.reading ol li{margin-top:10px;padding-left:4px}
.reading blockquote{
  margin:26px 0;padding:20px 24px;
  background:var(--brand-50);
  border-left:4px solid var(--brand);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  color:var(--ink-2);
}
.reading blockquote p{margin:0}
.reading img{border-radius:var(--radius-sm);margin:26px auto}
.reading figure{margin:26px 0}
.reading figcaption{font-size:13px;color:var(--ink-3);text-align:center;margin-top:10px}
.reading a{color:var(--brand);border-bottom:1px solid rgba(22,87,200,.35)}
.reading a:hover{color:var(--brand-700);border-bottom-color:var(--brand-700)}
.reading table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;display:block;overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius-sm)}
.reading th,.reading td{border-bottom:1px solid var(--line);padding:12px 16px;text-align:left;white-space:nowrap}
.reading th{background:var(--bg);font-weight:600}
.reading pre{background:#0E1726;color:#E7ECF5;padding:18px 20px;border-radius:var(--radius-sm);overflow-x:auto;font-size:14px;line-height:1.7}
.reading code{font-family:var(--font-num);font-size:.94em}
.reading hr{border:none;border-top:1px solid var(--line);margin:34px 0}

.empty-state{
  border:1.5px dashed var(--line);
  border-radius:var(--radius);
  background:#fff;
  padding:56px 24px;
  text-align:center;
}
.empty-state .empty-icon{
  width:56px;height:56px;border-radius:50%;
  background:var(--brand-50);color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  margin:0 auto 16px;font-size:24px;font-weight:700;
}
.empty-state h2{font-size:22px;margin-bottom:8px}
.empty-state p{color:var(--ink-2);margin-bottom:20px}

.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:40px;padding-top:24px;border-top:1px solid var(--line)}
.tag-row .tag-label{font-size:13px;color:var(--ink-3);margin-right:4px}
.tag{
  display:inline-flex;align-items:center;
  padding:6px 14px;border-radius:999px;
  background:var(--bg);border:1px solid var(--line);
  font-size:13px;color:var(--ink-2);
  transition:all .22s ease;
}
.tag:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-50)}
.back-row{margin-top:26px}

/* ============ 侧栏 ============ */
.side{position:sticky;top:88px;display:flex;flex-direction:column;gap:18px}
.side-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-card);
  padding:20px;
}
.side-card h3{font-size:15px;font-weight:700;margin-bottom:12px;color:var(--ink)}
.toc-list{display:flex;flex-direction:column;gap:2px}
.toc-list a{
  display:block;font-size:14px;color:var(--ink-2);
  padding:8px 10px;border-radius:8px;border-left:3px solid transparent;
  transition:all .2s ease;
}
.toc-list a:hover{background:var(--brand-50);color:var(--brand);border-left-color:var(--brand)}
.side-links{display:flex;flex-direction:column;gap:10px}
.side-links a{font-size:14px;color:var(--ink-2);display:flex;align-items:center;gap:8px;transition:color .2s ease,transform .2s ease}
.side-links a:hover{color:var(--brand);transform:translateX(4px)}
.side-links a::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand);opacity:.55;flex-shrink:0}
.side-summary{font-size:13px;color:var(--ink-3);line-height:1.8}

/* ============ 相关推荐 ============ */
.related{padding:8px 0 8px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:24px}
.section-head h2{font-size:28px;font-weight:700}
.section-head p{font-size:14px;color:var(--ink-3);margin-top:6px}
.related-track{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.reco-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-card);
  overflow:hidden;
  display:flex;flex-direction:column;
  transition:transform .25s cubic-bezier(.2,.7,.3,1), box-shadow .25s ease, border-color .25s ease;
}
.reco-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(22,87,200,.35)}
.reco-thumb{aspect-ratio:16/10;background:var(--bg);overflow:hidden}
.reco-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.reco-card:hover .reco-thumb img{transform:scale(1.04)}
.reco-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.reco-body h3{font-size:17px;font-weight:600;line-height:1.5}
.reco-body p{font-size:14px;color:var(--ink-2);line-height:1.7}
.reco-meta{margin-top:auto;font-size:13px;color:var(--ink-3)}

/* ============ CTA ============ */
.cta-band{padding:72px 0}
.cta-card{
  background:var(--brand-50);
  border:1px solid rgba(22,87,200,.14);
  border-radius:20px;
  padding:44px 48px;
  display:grid;
  grid-template-columns:minmax(0,1fr) auto;
  gap:32px;
  align-items:center;
}
.cta-card h2{font-size:30px;font-weight:800;line-height:1.3}
.cta-card p{color:var(--ink-2);margin-top:12px;font-size:15px;max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}
.cta-note{margin-top:12px;font-size:13px;color:var(--ink-3)}

/* ============ 页脚 ============ */
.site-footer{background:var(--footer);color:#fff;padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer-brand .logo__main{color:#fff}
.footer-brand .logo__sub{color:rgba(255,255,255,.55)}
.footer-brand .logo__mark{background:linear-gradient(140deg,#3B7BE8,var(--brand-700))}
.footer-brand p{color:rgba(255,255,255,.72);font-size:14px;line-height:1.8;margin-top:18px;max-width:340px}
.footer-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.footer-badges span{
  font-family:var(--font-num);
  font-size:12px;color:rgba(255,255,255,.8);
  padding:5px 12px;border-radius:999px;
  border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.05);
}
.footer-col h4{font-size:15px;font-weight:600;margin-bottom:16px;color:#fff}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72);transition:color .2s ease,transform .2s ease;display:inline-block}
.footer-col a:hover{color:#fff;transform:translateX(4px)}
.footer-bottom{
  margin-top:48px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.55);
}

/* 列表骨架与空态 */
.skeleton{background:linear-gradient(90deg,#EEF1F7 25%,#F7F9FC 37%,#EEF1F7 63%);background-size:400% 100%;animation:shimmer 1.4s ease infinite;border-radius:8px}
@keyframes shimmer{0%{background-position:100% 50%}100%{background-position:0 50%}}

@media(max-width:1279px){
  .layout{grid-template-columns:minmax(0,1fr) 240px;gap:36px}
  .article-title{font-size:38px}
}
@media(max-width:1023px){
  .main-nav{display:none}
  .hamburger{display:flex}
  .layout{grid-template-columns:minmax(0,1fr);gap:0}
  .side{position:static;flex-direction:row;flex-wrap:wrap;margin-top:24px}
  .side-card{flex:1 1 240px}
  .article-body{padding:32px 28px}
  .related-track{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:767px){
  body{font-size:15px}
  .site-header{height:64px}
  .article-title{font-size:30px}
  .article-head{padding:16px 0 22px;margin-bottom:26px}
  .article-body{padding:24px 20px;border-radius:var(--radius)}
  .reading{font-size:16px;line-height:1.8}
  .reading h2{font-size:22px;margin-top:32px}
  .reading h3{font-size:18px}
  .cta-band{padding:52px 0}
  .cta-card{grid-template-columns:minmax(0,1fr);padding:30px 24px}
  .cta-card h2{font-size:24px}
  .cta-actions .btn{width:100%}
  .related-track{display:flex;overflow-x:auto;gap:16px;scroll-snap-type:x mandatory;padding-bottom:8px;-webkit-overflow-scrolling:touch}
  .reco-card{flex:0 0 82%;scroll-snap-align:start}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column}
}
@media(max-width:419px){
  .article-title{font-size:26px}
  .btn{padding:11px 18px;font-size:14px}
  .logo__sub{display:none}
}

/* roulang page: category1 */
/* ============ 设计变量 ============ */
:root{
  --brand:#1657C8;
  --brand-700:#0F46A8;
  --brand-50:#EDF3FE;
  --accent:#FF7A45;
  --accent-700:#E8622C;
  --teal:#12B0A0;
  --ink:#0E1726;
  --ink-2:#4A5568;
  --ink-3:#8A94A6;
  --bg:#F5F7FB;
  --surface:#FFFFFF;
  --line:#E4E9F2;
  --footer:#0E1726;
  --radius-card:16px;
  --radius-sm:12px;
  --shadow-card:0 1px 2px rgba(14,23,38,.05), 0 12px 30px -14px rgba(14,23,38,.14);
  --shadow-hover:0 22px 44px -18px rgba(22,87,200,.22);
  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ============ 基础 reset ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--ink);
  background:var(--bg);
}
h1,h2,h3,h4,p,figure,blockquote{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input{font:inherit;}
:focus-visible{outline:2px solid rgba(22,87,200,.35);outline-offset:2px;border-radius:6px;}

/* ============ 容器与通用排版 ============ */
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
.num{font-family:"Inter",system-ui,sans-serif;letter-spacing:-.02em;font-variant-numeric:tabular-nums;}
.section-head{margin-bottom:28px;}
.section-head h2{
  font-size:32px;
  line-height:1.25;
  font-weight:700;
  letter-spacing:-.01em;
}
.section-head p{
  margin-top:10px;
  color:var(--ink-2);
  font-size:15px;
  max-width:720px;
}

/* ============ 徽章与标签 ============ */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:28px;
  padding:0 12px;
  border-radius:999px;
  font-size:13px;
  font-weight:500;
  white-space:nowrap;
}
.badge--brand{background:var(--brand-50);color:var(--brand-700);}
.badge--teal{background:#E6F7F4;color:#0C8C80;}
.badge--accent{background:#FFF1EA;color:var(--accent-700);}
.badge--line{background:#fff;border:1px solid var(--line);color:var(--ink-2);}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 22px;
  border-radius:999px;
  font-size:15px;
  font-weight:600;
  transition:transform .25s var(--ease),background-color .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease);
  white-space:nowrap;
}
.btn--primary{background:var(--brand);color:#fff;box-shadow:0 12px 26px -16px rgba(22,87,200,.6);}
.btn--primary:hover{background:var(--brand-700);transform:translateY(-2px);box-shadow:0 18px 34px -18px rgba(22,87,200,.6);}
.btn--accent{background:var(--accent);color:#fff;box-shadow:0 12px 26px -16px rgba(255,122,69,.75);}
.btn--accent:hover{background:var(--accent-700);transform:translateY(-2px) scale(1.02);}
.btn--ghost{background:#fff;border:1.5px solid var(--line);color:var(--ink);}
.btn--ghost:hover{border-color:var(--brand);background:var(--brand-50);color:var(--brand-700);}
.btn--sm{height:38px;padding:0 16px;font-size:14px;}
.btn:active{transform:translateY(1px);}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none;}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(255,255,255,.55);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  backdrop-filter:blur(14px) saturate(160%);
  border-bottom:1px solid rgba(255,255,255,.6);
  box-shadow:0 8px 24px -16px rgba(14,23,38,.25);
  transition:background-color .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.site-header.is-scrolled{
  background:#fff;
  border-bottom-color:var(--line);
  box-shadow:0 14px 34px -26px rgba(14,23,38,.55);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:28px;
  height:76px;
  transition:height .3s var(--ease);
}
.site-header.is-scrolled .header-inner{height:60px;}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.logo__mark{
  width:38px;height:38px;border-radius:11px;
  background:linear-gradient(135deg,var(--brand),var(--brand-700));
  color:#fff;display:grid;place-items:center;
  font-size:17px;font-weight:800;
  box-shadow:0 10px 20px -12px rgba(22,87,200,.8);
}
.logo__text{display:flex;flex-direction:column;line-height:1.15;}
.logo__main{font-size:16px;font-weight:700;color:var(--ink);letter-spacing:.02em;}
.logo__sub{font-size:11.5px;color:var(--ink-3);letter-spacing:.14em;}
.main-nav{display:flex;align-items:center;gap:26px;margin-left:auto;}
.nav-link{
  position:relative;
  font-size:15px;
  font-weight:500;
  color:var(--ink-2);
  padding:6px 2px;
  transition:color .25s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:0;height:2px;
  border-radius:2px;
  background:var(--brand);
  transition:width .25s var(--ease);
}
.nav-link:hover{color:var(--brand);}
.nav-link:hover::after{width:100%;}
.nav-link.is-active{color:var(--brand-700);font-weight:600;}
.nav-link.is-active::after{width:100%;}
.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.icon-btn{
  width:40px;height:40px;border-radius:50%;
  border:1px solid var(--line);
  display:grid;place-items:center;
  background:rgba(255,255,255,.7);
  color:var(--ink-2);
  transition:border-color .25s var(--ease),color .25s var(--ease),background-color .25s var(--ease);
}
.icon-btn:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-50);}
.menu-toggle{display:none;width:40px;height:40px;border-radius:12px;border:1px solid var(--line);background:#fff;place-items:center;}
.menu-toggle span{display:block;width:16px;height:2px;background:var(--ink);border-radius:2px;position:relative;}
.menu-toggle span::before,.menu-toggle span::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:var(--ink);border-radius:2px;
}
.menu-toggle span::before{top:-5px;}
.menu-toggle span::after{top:5px;}

/* 移动端抽屉 */
.drawer{
  position:fixed;
  inset:0;
  z-index:200;
  background:#fff;
  padding:88px 20px 100px;
  transform:translateY(-102%);
  transition:transform .35s var(--ease);
  display:flex;
  flex-direction:column;
  gap:6px;
  overflow-y:auto;
}
.drawer.is-open{transform:translateY(0);}
.drawer a{
  font-size:17px;
  font-weight:500;
  color:var(--ink);
  padding:14px 6px;
  border-bottom:1px solid var(--line);
}
.drawer a.is-active{color:var(--brand-700);font-weight:600;}
.drawer__foot{
  position:fixed;
  left:0;right:0;bottom:0;
  padding:14px 20px calc(14px + env(safe-area-inset-bottom));
  background:#fff;
  border-top:1px solid var(--line);
}
.drawer__foot .btn{width:100%;}
body.is-locked{overflow:hidden;}

/* ============ 矮 Hero ============ */
.page-hero{
  position:relative;
  overflow:hidden;
  padding:48px 0 56px;
  background-color:var(--bg);
  background-image:
    linear-gradient(rgba(245,247,251,.93),rgba(245,247,251,.97)),
    url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
}
.page-hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:
    repeating-linear-gradient(0deg,rgba(14,23,38,.04) 0 1px,transparent 1px 24px),
    repeating-linear-gradient(90deg,rgba(14,23,38,.04) 0 1px,transparent 1px 24px);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:1;}
.crumbs{
  display:flex;align-items:center;gap:10px;
  font-size:13px;color:var(--ink-3);
  margin-bottom:20px;
}
.crumbs a{color:var(--ink-3);transition:color .25s var(--ease);}
.crumbs a:hover{color:var(--brand);}
.crumbs span.sep{width:14px;height:1px;background:var(--line);display:inline-block;}
.page-hero h1{
  font-size:44px;
  line-height:1.18;
  font-weight:800;
  letter-spacing:-.015em;
  max-width:880px;
}
.page-hero h1 em{
  font-style:normal;
  color:var(--brand);
}
.hero-lead{
  margin-top:18px;
  max-width:720px;
  font-size:16px;
  color:var(--ink-2);
}
.hero-meta{
  margin-top:24px;
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  align-items:center;
}
.hero-stats{
  margin-top:34px;
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:16px;
  max-width:880px;
}
.stat{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:16px 18px;
  box-shadow:var(--shadow-card);
}
.stat dt{font-size:13px;color:var(--ink-3);}
.stat dd{
  margin:4px 0 0;
  font-size:22px;
  font-weight:700;
  font-family:"Inter",system-ui,sans-serif;
  letter-spacing:-.02em;
  color:var(--brand-700);
}

/* ============ 两栏布局 ============ */
.layout{
  display:grid;
  grid-template-columns:240px minmax(0,1fr);
  gap:40px;
  align-items:start;
  padding:64px 0 88px;
}
.anchor-nav{
  position:sticky;
  top:96px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:18px 14px;
  box-shadow:var(--shadow-card);
}
.anchor-nav__title{
  font-size:12.5px;
  letter-spacing:.12em;
  color:var(--ink-3);
  padding:0 10px 10px;
}
.anchor-nav a{
  display:block;
  padding:9px 12px;
  border-left:3px solid transparent;
  border-radius:10px;
  font-size:14.5px;
  color:var(--ink-2);
  transition:background-color .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease);
}
.anchor-nav a:hover{background:var(--brand-50);color:var(--brand-700);}
.anchor-nav a.is-active{
  background:var(--brand-50);
  color:var(--brand-700);
  border-left-color:var(--brand);
  font-weight:600;
}

/* ============ 信息卡 ============ */
.content-col{display:flex;flex-direction:column;gap:24px;}
.info-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:30px;
  box-shadow:var(--shadow-card);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.info-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#D8E2F5;}
.card-head{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:16px;
}
.card-head .idx{
  width:34px;height:34px;flex-shrink:0;
  border-radius:10px;
  background:var(--brand-50);
  color:var(--brand-700);
  display:grid;place-items:center;
  font-family:"Inter",system-ui,sans-serif;
  font-size:14px;font-weight:700;
}
.card-head h2{font-size:21px;font-weight:700;line-height:1.35;}
.info-card p{color:var(--ink-2);font-size:15px;}
.info-card p + p{margin-top:12px;}

/* 要点列表 */
.check-list{margin-top:16px;display:grid;gap:10px;}
.check-list li{
  position:relative;
  padding-left:24px;
  font-size:15px;
  color:var(--ink-2);
}
.check-list li::before{
  content:"";
  position:absolute;left:0;top:9px;
  width:8px;height:8px;border-radius:50%;
  background:var(--teal);
  box-shadow:0 0 0 4px rgba(18,176,160,.14);
}

/* 规格条 */
.spec-list{margin-top:18px;border-top:1px dashed var(--line);}
.spec-list li{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:13px 0;
  border-bottom:1px dashed var(--line);
  font-size:15px;
}
.spec-list li:last-child{border-bottom:0;}
.spec-list dt{color:var(--ink-2);}
.spec-list dd{margin:0;font-weight:600;color:var(--ink);font-family:"Inter","PingFang SC",system-ui,sans-serif;letter-spacing:-.01em;}

/* 流程步骤 */
.steps{margin-top:18px;display:grid;gap:14px;counter-reset:step;}
.steps li{
  position:relative;
  padding:16px 18px 16px 58px;
  background:#FAFBFE;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  font-size:15px;
  color:var(--ink-2);
  counter-increment:step;
}
.steps li::before{
  content:counter(step);
  position:absolute;
  left:18px;top:15px;
  width:26px;height:26px;
  border-radius:50%;
  background:var(--brand);
  color:#fff;
  font-family:"Inter",system-ui,sans-serif;
  font-size:13px;font-weight:700;
  display:grid;place-items:center;
}
.steps li strong{color:var(--ink);font-weight:600;}

/* 图位 */
.figure{
  margin-top:20px;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  overflow:hidden;
  background:#F1F4FA;
}
.figure img{width:100%;height:auto;display:block;aspect-ratio:16/10;object-fit:cover;}
.figure figcaption{
  padding:12px 16px;
  font-size:13px;
  color:var(--ink-3);
  background:#fff;
  border-top:1px solid var(--line);
}

/* 提示条 */
.notice{
  margin-top:18px;
  display:flex;
  gap:12px;
  padding:16px 18px;
  border-radius:var(--radius-sm);
  background:#FFF1EA;
  color:#B8431A;
  font-size:14.5px;
}
.notice strong{color:#8F3312;font-weight:600;}

/* ============ FAQ ============ */
.faq{margin-top:8px;display:grid;gap:12px;}
.faq details{
  background:#FAFBFE;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  transition:border-color .25s var(--ease),background-color .25s var(--ease);
}
.faq details[open]{border-color:#C9D9F6;background:#fff;}
.faq summary{
  list-style:none;
  cursor:pointer;
  padding:16px 52px 16px 18px;
  position:relative;
  font-size:15.5px;
  font-weight:600;
  color:var(--ink);
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::after{
  content:"";
  position:absolute;
  right:20px;top:50%;
  width:9px;height:9px;
  border-right:2px solid var(--ink-3);
  border-bottom:2px solid var(--ink-3);
  transform:translateY(-70%) rotate(45deg);
  transition:transform .25s var(--ease),border-color .25s var(--ease);
}
.faq details[open] summary::after{transform:translateY(-30%) rotate(-135deg);border-color:var(--brand);}
.faq .faq-body{
  padding:0 18px 18px;
  font-size:15px;
  color:var(--ink-2);
}

/* ============ CTA ============ */
.cta-bar{
  margin-top:8px;
  padding:38px 32px;
  border-radius:20px;
  background:var(--brand-50);
  border:1px solid #D7E4FB;
  text-align:center;
}
.cta-bar h2{font-size:26px;font-weight:700;letter-spacing:-.01em;}
.cta-bar p{margin-top:12px;color:var(--ink-2);font-size:15px;max-width:640px;margin-left:auto;margin-right:auto;}
.cta-actions{
  margin-top:24px;
  display:flex;
  justify-content:center;
  gap:14px;
  flex-wrap:wrap;
}
.cta-note{margin-top:16px;font-size:13px;color:var(--ink-3);}

/* ============ 互链卡 ============ */
.link-cards{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:20px;
  margin-top:8px;
}
.link-card{
  display:block;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:24px;
  box-shadow:var(--shadow-card);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.link-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#D8E2F5;}
.link-card h3{font-size:18px;font-weight:600;margin-bottom:8px;color:var(--ink);}
.link-card p{font-size:14.5px;color:var(--ink-2);}
.link-card .arrow{
  margin-top:16px;
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--brand);
}
.link-card:hover h3{color:var(--brand-700);}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--footer);
  color:rgba(255,255,255,.72);
  padding:64px 0 28px;
  margin-top:24px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:40px;
}
.footer-brand .logo__mark{box-shadow:none;}
.footer-brand .logo__main{color:#fff;}
.footer-brand .logo__sub{color:rgba(255,255,255,.55);}
.footer-brand p{
  margin-top:18px;
  font-size:14.5px;
  line-height:1.8;
  color:rgba(255,255,255,.62);
  max-width:340px;
}
.footer-badges{margin-top:18px;display:flex;flex-wrap:wrap;gap:10px;}
.footer-badges span{
  display:inline-flex;align-items:center;
  height:28px;padding:0 12px;
  border-radius:999px;
  font-size:12.5px;
  background:rgba(255,255,255,.08);
  color:rgba(255,255,255,.78);
  border:1px solid rgba(255,255,255,.12);
}
.footer-col h4{
  font-size:14px;
  font-weight:600;
  color:#fff;
  margin-bottom:16px;
  letter-spacing:.04em;
}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{
  font-size:14px;
  color:rgba(255,255,255,.72);
  transition:color .25s var(--ease),transform .25s var(--ease);
  display:inline-block;
}
.footer-col a:hover{color:#fff;transform:translateX(4px);}
.footer-bottom{
  margin-top:48px;
  padding-top:22px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:rgba(255,255,255,.5);
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .page-hero h1{font-size:40px;}
}
@media (max-width:1023px){
  .main-nav{display:none;}
  .menu-toggle{display:grid;}
  .layout{grid-template-columns:1fr;gap:24px;padding:44px 0 72px;}
  .anchor-nav{
    position:static;
    display:flex;
    gap:8px;
    overflow-x:auto;
    padding:12px;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:none;
  }
  .anchor-nav::-webkit-scrollbar{display:none;}
  .anchor-nav__title{display:none;}
  .anchor-nav a{
    border-left:0;
    border:1px solid var(--line);
    border-radius:999px;
    white-space:nowrap;
    padding:8px 14px;
    font-size:14px;
  }
  .anchor-nav a.is-active{border-color:var(--brand);}
  .hero-stats{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .page-hero{padding:34px 0 42px;}
  .page-hero h1{font-size:30px;}
  .hero-lead{font-size:15px;}
  .section-head h2{font-size:24px;}
  .info-card{padding:22px;}
  .card-head h2{font-size:19px;}
  .link-cards{grid-template-columns:1fr;}
  .cta-bar{padding:28px 20px;}
  .cta-bar h2{font-size:22px;}
  .cta-actions{flex-direction:column;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .header-actions .btn--accent{display:none;}
}
@media (max-width:420px){
  .page-hero h1{font-size:26px;}
  .hero-stats{grid-template-columns:1fr;}
  .btn{height:44px;font-size:14.5px;}
}

/* roulang page: category2 */
:root{
  --brand:#1657C8;
  --brand-700:#0F46A8;
  --brand-50:#EDF3FE;
  --accent:#FF7A45;
  --accent-700:#E8622C;
  --accent-50:#FFF1EA;
  --teal:#12B0A0;
  --teal-50:#E6F7F5;
  --ink:#0E1726;
  --ink-2:#4A5568;
  --ink-3:#8A94A6;
  --bg:#F5F7FB;
  --surface:#FFFFFF;
  --line:#E4E9F2;
  --footer:#0E1726;
  --radius-card:16px;
  --radius-big:20px;
  --radius-sm:12px;
  --radius-pill:999px;
  --shadow-card:0 1px 2px rgba(14,23,38,.05),0 12px 30px -14px rgba(14,23,38,.14);
  --shadow-card-hover:0 22px 44px -18px rgba(22,87,200,.22);
  --shadow-nav:0 8px 24px -16px rgba(14,23,38,.25);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1200px;
  --header-h:76px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--ink);
  background:var(--bg);
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid rgba(22,87,200,.35);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.num{font-family:"Inter",system-ui,sans-serif;letter-spacing:-.02em;}

/* ============ 导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:var(--header-h);
  background:rgba(255,255,255,.55);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  backdrop-filter:blur(14px) saturate(160%);
  border-bottom:1px solid rgba(255,255,255,.6);
  box-shadow:var(--shadow-nav);
  transition:height .3s var(--ease),background .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.site-header.is-scrolled{
  background:#FFFFFF;
  border-bottom-color:var(--line);
  box-shadow:0 10px 28px -20px rgba(14,23,38,.45);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:100%;}
.logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.logo__mark{
  width:38px;height:38px;border-radius:11px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--brand) 0%,var(--brand-700) 100%);
  color:#fff;font-size:18px;font-weight:800;letter-spacing:0;
  box-shadow:0 8px 18px -10px rgba(22,87,200,.7);
}
.logo__text{display:flex;flex-direction:column;line-height:1.12;}
.logo__main{font-size:16px;font-weight:800;color:var(--ink);}
.logo__sub{font-size:11px;font-weight:600;color:var(--brand);letter-spacing:.16em;}
.main-nav{display:flex;align-items:center;gap:6px;}
.nav-link{
  position:relative;padding:10px 14px;border-radius:10px;
  font-size:15px;font-weight:500;color:var(--ink-2);
  transition:color .25s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:5px;height:2px;
  background:var(--brand);border-radius:2px;
  transform:scaleX(0);transform-origin:left;
  transition:transform .25s var(--ease);
}
.nav-link:hover{color:var(--brand);}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--brand);}
.nav-actions{display:flex;align-items:center;gap:12px;}
.icon-btn{
  width:40px;height:40px;border-radius:50%;
  border:1px solid var(--line);background:rgba(255,255,255,.7);
  display:flex;align-items:center;justify-content:center;color:var(--ink-2);
  transition:border-color .25s var(--ease),color .25s var(--ease),background .25s var(--ease);
}
.icon-btn:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-50);}
.icon-btn svg{width:18px;height:18px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;line-height:1;
  transition:transform .25s var(--ease),background .25s var(--ease),box-shadow .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease);
  white-space:nowrap;
}
.btn:active{transform:translateY(1px);}
.btn--primary{background:var(--brand);color:#fff;box-shadow:0 12px 24px -16px rgba(22,87,200,.9);}
.btn--primary:hover{background:var(--brand-700);transform:translateY(-2px);box-shadow:0 18px 30px -16px rgba(22,87,200,.75);}
.btn--ghost{border:1.5px solid var(--line);color:var(--ink);background:#fff;}
.btn--ghost:hover{border-color:var(--brand);background:var(--brand-50);color:var(--brand-700);transform:translateY(-2px);}
.btn--download{background:var(--accent);color:#fff;box-shadow:0 12px 24px -16px rgba(232,98,44,.9);}
.btn--download:hover{background:var(--accent-700);transform:translateY(-2px) scale(1.02);}
.btn--block{width:100%;}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:12px;
  border:1px solid var(--line);background:rgba(255,255,255,.7);
  align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
/* 移动抽屉 */
.drawer{
  position:fixed;inset:0;z-index:99;background:#fff;
  padding:calc(var(--header-h) + 18px) 24px 32px;
  transform:translateY(-100%);opacity:0;visibility:hidden;
  transition:transform .32s var(--ease),opacity .32s var(--ease),visibility .32s var(--ease);
  display:flex;flex-direction:column;gap:8px;
}
.drawer.is-open{transform:translateY(0);opacity:1;visibility:visible;}
.drawer a.drawer-link{
  font-size:17px;font-weight:600;color:var(--ink);padding:14px 4px;
  border-bottom:1px solid var(--line);
}
.drawer a.drawer-link.is-active{color:var(--brand);}
.drawer .btn{margin-top:auto;}

/* ============ Hero ============ */
.hero{
  position:relative;overflow:hidden;
  padding:132px 0 64px;
  background-color:var(--bg);
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center right;background-repeat:no-repeat;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(115deg,rgba(245,247,251,.98) 0%,rgba(245,247,251,.93) 46%,rgba(245,247,251,.72) 100%);
}
.hero>.container{position:relative;z-index:2;}
.breadcrumb{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--ink-3);margin-bottom:20px;flex-wrap:wrap;}
.breadcrumb a{color:var(--ink-2);transition:color .25s var(--ease);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{width:14px;height:1px;background:var(--line);display:inline-block;}
.badge-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:18px;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:var(--radius-pill);
  font-size:13px;font-weight:600;line-height:1.4;
}
.badge--brand{background:var(--brand-50);color:var(--brand);}
.badge--teal{background:var(--teal-50);color:#0C8C80;}
.badge--accent{background:var(--accent-50);color:var(--accent-700);}
.hero h1{
  font-size:46px;line-height:1.18;font-weight:800;letter-spacing:-.01em;
  max-width:900px;
}
.hero .lead{
  margin-top:20px;font-size:17px;color:var(--ink-2);max-width:720px;line-height:1.8;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-meta{
  margin-top:34px;display:flex;flex-wrap:wrap;gap:28px;
  padding-top:24px;border-top:1px solid var(--line);
}
.hero-meta div{display:flex;flex-direction:column;gap:2px;}
.hero-meta dt,.hero-meta .k{font-size:13px;color:var(--ink-3);}
.hero-meta .v{font-size:18px;font-weight:700;color:var(--ink);}

/* ============ Tab 条 ============ */
.tabbar{
  position:sticky;top:var(--header-h);z-index:60;
  background:rgba(255,255,255,.88);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:top .3s var(--ease);
}
.tabbar-inner{display:flex;gap:10px;padding:12px 0;overflow-x:auto;scrollbar-width:none;}
.tabbar-inner::-webkit-scrollbar{display:none;}
.tab-pill{
  padding:9px 18px;border-radius:var(--radius-pill);
  font-size:14px;font-weight:600;color:var(--ink-2);
  border:1px solid var(--line);background:#fff;white-space:nowrap;
  transition:all .25s var(--ease);
}
.tab-pill:hover{border-color:var(--brand);color:var(--brand);}
.tab-pill.is-active{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 10px 22px -14px rgba(22,87,200,.9);}

/* ============ 通用板块 ============ */
.section{padding:88px 0;}
.section--tight{padding:64px 0 88px;}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head h2{font-size:32px;line-height:1.28;font-weight:700;letter-spacing:-.01em;}
.section-head p{margin-top:14px;font-size:16px;color:var(--ink-2);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;color:var(--brand);letter-spacing:.1em;
  margin-bottom:14px;text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--brand);border-radius:2px;}
.scroll-target{scroll-margin-top:calc(var(--header-h) + 84px);}

/* ============ 双栏图文 ============ */
.feature-row{
  display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center;
  padding:32px 0;
}
.feature-row+.feature-row{margin-top:28px;}
.feature-row--reverse .feature-text{order:2;}
.feature-row--reverse .feature-media{order:1;}
.feature-text h3{font-size:22px;font-weight:700;line-height:1.4;}
.feature-text p{margin-top:14px;color:var(--ink-2);font-size:16px;}
.check-list{margin-top:20px;display:flex;flex-direction:column;gap:12px;}
.check-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--ink-2);}
.check-list li::before{
  content:"";flex-shrink:0;width:8px;height:8px;border-radius:50%;
  background:var(--teal);margin-top:9px;
  box-shadow:0 0 0 4px rgba(18,176,160,.14);
}
.feature-media{
  border-radius:18px;overflow:hidden;background:#fff;
  border:1px solid var(--line);box-shadow:var(--shadow-card);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease);
}
.feature-media:hover{transform:translateY(-4px);box-shadow:var(--shadow-card-hover);}
.feature-media img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.feature-media figcaption{padding:14px 20px;font-size:13px;color:var(--ink-3);border-top:1px solid var(--line);}

/* ============ 规格卡 ============ */
.spec-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.spec-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:28px;box-shadow:var(--shadow-card);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease);
}
.spec-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card-hover);}
.spec-card__head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;}
.spec-card__head h3{font-size:20px;font-weight:600;}
.spec-row{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:14px 0;border-bottom:1px dashed var(--line);
}
.spec-row:last-child{border-bottom:0;padding-bottom:0;}
.spec-row .label{display:flex;align-items:center;gap:10px;font-size:15px;color:var(--ink-2);}
.spec-row .label::before{
  content:"";width:7px;height:7px;border-radius:50%;background:var(--teal);flex-shrink:0;
}
.spec-row .value{font-size:15px;font-weight:600;color:var(--ink);text-align:right;}

/* ============ FAQ ============ */
.faq-list{max-width:880px;display:flex;flex-direction:column;gap:14px;}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);overflow:hidden;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.faq-item[open]{border-color:rgba(22,87,200,.35);}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 24px;font-size:17px;font-weight:600;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"";flex-shrink:0;width:12px;height:12px;
  border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);
  transform:rotate(45deg);transition:transform .25s var(--ease);margin-top:-4px;
}
.faq-item[open] summary::after{transform:rotate(225deg);margin-top:4px;}
.faq-item summary:hover{color:var(--brand);}
.faq-body{padding:0 24px 22px;color:var(--ink-2);font-size:15px;line-height:1.85;}
.faq-note{
  margin-top:22px;max-width:880px;padding:18px 22px;
  background:var(--brand-50);border-radius:var(--radius-sm);
  font-size:14px;color:var(--brand-700);display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
}

/* ============ 下载引导 ============ */
.cta-band{
  background:var(--brand-50);border-radius:var(--radius-big);
  padding:40px;display:flex;flex-wrap:wrap;gap:28px;align-items:center;justify-content:space-between;
  border:1px solid rgba(22,87,200,.14);
}
.cta-band h3{font-size:24px;font-weight:700;}
.cta-band p{margin-top:10px;color:var(--ink-2);font-size:15px;max-width:520px;}
.cta-band .cta-actions{display:flex;flex-wrap:wrap;gap:14px;}
.cta-band .foot-note{margin-top:14px;font-size:13px;color:var(--ink-3);}

/* ============ 互链卡 ============ */
.link-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:32px;}
.link-card{
  display:block;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-card);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.link-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card-hover);border-color:rgba(22,87,200,.3);}
.link-card img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.link-card__body{padding:22px 24px 24px;}
.link-card__body h3{font-size:19px;font-weight:600;}
.link-card__body p{margin-top:10px;font-size:14px;color:var(--ink-2);}
.link-card__more{margin-top:16px;font-size:14px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px;}
.link-card:hover .link-card__more{gap:10px;}

/* ============ 页脚 ============ */
.site-footer{background:var(--footer);color:rgba(255,255,255,.72);padding:72px 0 28px;margin-top:8px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}
.footer-brand .logo__mark{background:rgba(255,255,255,.12);box-shadow:none;}
.footer-brand .logo__main{color:#fff;}
.footer-brand .logo__sub{color:#8FB4F4;}
.footer-brand p{margin-top:18px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);max-width:340px;}
.footer-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;}
.footer-badges span{
  font-size:12px;padding:5px 12px;border-radius:var(--radius-pill);
  background:rgba(255,255,255,.1);color:rgba(255,255,255,.82);
}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:18px;}
.footer-col ul{display:flex;flex-direction:column;gap:12px;}
.footer-col a{
  font-size:14px;color:rgba(255,255,255,.72);
  transition:color .25s var(--ease),transform .25s var(--ease);
  display:inline-block;
}
.footer-col a:hover{color:#fff;transform:translateX(4px);}
.footer-bottom{
  margin-top:52px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .hero h1{font-size:40px;}
}
@media (max-width:1023px){
  .main-nav{display:none;}
  .nav-toggle{display:flex;}
  .nav-actions .btn--download{display:none;}
  .hero{padding:120px 0 56px;}
  .hero h1{font-size:36px;}
  .section{padding:72px 0;}
  .feature-row{grid-template-columns:1fr;gap:28px;}
  .feature-row--reverse .feature-text{order:1;}
  .feature-row--reverse .feature-media{order:2;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .hero{padding:110px 0 48px;}
  .hero h1{font-size:32px;}
  .hero .lead{font-size:15px;}
  .hero-meta{gap:20px;}
  .section{padding:56px 0;}
  .section-head h2{font-size:24px;}
  .spec-grid{grid-template-columns:1fr;}
  .link-grid{grid-template-columns:1fr;}
  .cta-band{padding:26px;}
  .cta-band h3{font-size:20px;}
  .cta-band .cta-actions{width:100%;}
  .cta-band .cta-actions .btn{width:100%;}
  .faq-item summary{font-size:16px;padding:18px;}
  .faq-body{padding:0 18px 18px;}
  .footer-grid{grid-template-columns:1fr;}
  .site-footer{padding:52px 0 24px;}
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media (max-width:420px){
  .hero h1{font-size:28px;}
  .hero-actions .btn{width:100%;}
  .badge{font-size:12px;padding:5px 11px;}
}