/* roulang page: index */
:root{
  --c-ink:#14211F;
  --c-primary:#1F5F53;
  --c-primary-deep:#123A33;
  --c-tint:#6FB3A5;
  --c-accent:#E5764A;
  --c-accent-deep:#D2663B;
  --c-accent-soft:#F6E3D8;
  --c-bg:#FAF7F2;
  --c-surface:#FFFFFF;
  --c-line:#E6DFD4;
  --c-muted:#6B7A75;
  --c-danger:#C4452F;

  --r-card:18px;
  --r-img:14px;
  --r-field:12px;

  --sh-1:0 1px 2px rgba(20,33,31,.06), 0 8px 24px -12px rgba(20,33,31,.18);
  --sh-2:0 18px 40px -18px rgba(20,33,31,.28);

  --ease:cubic-bezier(.2,.7,.3,1);
  --nav-h:64px;

  --bs-primary:#1F5F53;
  --bs-body-bg:#FAF7F2;
  --bs-body-color:#14211F;
  --bs-border-color:#E6DFD4;
  --bs-border-radius:18px;
  --bs-link-color:#1F5F53;
  --bs-link-hover-color:#E5764A;
  --bs-body-font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--c-ink);
  background:var(--c-bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--c-primary);text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--c-accent);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--c-ink);}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:6px;}

.container{max-width:1240px;padding-left:24px;padding-right:24px;margin:0 auto;width:100%;}
@media (max-width:575.98px){.container{padding-left:16px;padding-right:16px;}}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(250,247,242,.94);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid var(--c-line);
}
.nav-wrap{
  height:var(--nav-h);
  display:flex;align-items:center;gap:24px;
  justify-content:space-between;
}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--c-ink);letter-spacing:.01em;flex:0 0 auto;}
.brand:hover{color:var(--c-ink);}
.brand-mark{
  width:24px;height:24px;border-radius:7px;
  background:linear-gradient(135deg,var(--c-primary) 0%,var(--c-tint) 100%);
  position:relative;flex:0 0 auto;
}
.brand-mark::after{
  content:"";position:absolute;inset:6px;border-radius:3px;
  border:2px solid rgba(255,255,255,.9);border-right-color:transparent;border-bottom-color:transparent;
  transform:rotate(45deg);
}
.nav-main{display:flex;align-items:center;gap:4px;flex:1 1 auto;margin-left:8px;}
.nav-link{
  position:relative;padding:8px 12px;font-size:15px;color:var(--c-ink);
  border-radius:10px;white-space:nowrap;transition:color .18s var(--ease),background .18s var(--ease);
}
.nav-link:hover{color:var(--c-primary);background:rgba(111,179,165,.12);}
.nav-link.active{color:var(--c-primary);font-weight:600;}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--c-accent);border-radius:2px;
}
.nav-side{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.icon-btn{
  width:40px;height:40px;border-radius:12px;border:1px solid var(--c-line);
  background:var(--c-surface);color:var(--c-primary);
  display:inline-flex;align-items:center;justify-content:center;cursor:pointer;
  transition:all .18s var(--ease);
}
.icon-btn:hover{border-color:var(--c-primary);background:var(--c-accent-soft);}
.icon-btn svg{width:18px;height:18px;}
.btn-main{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:50px;padding:0 28px;border:0;border-radius:999px;
  background:var(--c-accent);color:#fff;font-size:15px;font-weight:600;
  cursor:pointer;text-decoration:none;white-space:nowrap;
  box-shadow:0 10px 22px -14px rgba(229,118,74,.95);
  transition:background .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease),color .18s var(--ease);
}
.btn-main:hover{background:var(--c-accent-deep);color:#fff;transform:translateY(-2px);box-shadow:0 18px 34px -18px rgba(20,33,31,.34);}
.btn-main:active{transform:translateY(1px);}
.btn-main.sm{height:40px;padding:0 18px;font-size:14px;}
.btn-main.block{width:100%;}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:50px;padding:0 22px;border-radius:12px;
  background:var(--c-surface);border:1px solid var(--c-line);color:var(--c-primary);
  font-size:15px;font-weight:600;cursor:pointer;text-decoration:none;
  transition:all .18s var(--ease);
}
.btn-ghost:hover{border-color:var(--c-primary);background:var(--c-accent-soft);color:var(--c-primary);}
.btn-ghost:active{transform:translateY(1px);}
.btn-ghost.sm{height:40px;padding:0 16px;font-size:14px;}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--c-primary);
}
.btn-text::after{content:"→";transition:transform .18s var(--ease);}
.btn-text:hover{color:var(--c-accent);}
.btn-text:hover::after{transform:translateX(3px);}

.nav-search{
  display:none;align-items:center;gap:8px;height:40px;padding:0 14px;
  border:1px solid var(--c-line);border-radius:12px;background:var(--c-surface);
  min-width:230px;
}
.nav-search.open{display:flex;}
.nav-search input{
  border:0;outline:0;background:transparent;font-size:14px;width:100%;color:var(--c-ink);
}
.hamburger{
  display:none;width:40px;height:40px;border-radius:12px;border:1px solid var(--c-line);
  background:var(--c-surface);cursor:pointer;padding:0;align-items:center;justify-content:center;
}
.hamburger span{display:block;width:16px;height:2px;background:var(--c-primary);border-radius:2px;position:relative;}
.hamburger span::before,.hamburger span::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:var(--c-primary);border-radius:2px;
}
.hamburger span::before{top:-5px;}
.hamburger span::after{top:5px;}

.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);
  background:var(--c-surface);border-left:1px solid var(--c-line);
  transform:translateX(100%);transition:transform .28s var(--ease);
  z-index:1050;padding:24px 22px;overflow-y:auto;box-shadow:-20px 0 50px -30px rgba(20,33,31,.4);
}
.mobile-drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px;}
.drawer-close{
  width:36px;height:36px;border-radius:10px;border:1px solid var(--c-line);background:var(--c-surface);
  font-size:18px;line-height:1;color:var(--c-primary);cursor:pointer;
}
.drawer-nav{display:flex;flex-direction:column;gap:4px;margin-bottom:24px;}
.drawer-nav a{
  padding:12px 14px;border-radius:12px;font-size:15px;color:var(--c-ink);font-weight:500;
}
.drawer-nav a:hover,.drawer-nav a.active{background:var(--c-accent-soft);color:var(--c-primary);}
.mask{
  position:fixed;inset:0;background:rgba(18,58,51,.4);opacity:0;pointer-events:none;
  transition:opacity .28s var(--ease);z-index:1040;
}
.mask.open{opacity:1;pointer-events:auto;}

/* ---------- Hero ---------- */
.hero{padding:calc(var(--nav-h) + 56px) 0 72px;}
.hero-grid{
  display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:center;
  min-height:clamp(520px,68vh,720px);
}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;letter-spacing:.06em;
  color:var(--c-primary);background:rgba(111,179,165,.16);
  padding:6px 14px;border-radius:999px;margin-bottom:20px;
}
.hero-tag i{width:7px;height:7px;border-radius:50%;background:var(--c-accent);display:inline-block;}
.hero h1{
  font-size:clamp(30px,4.6vw,52px);line-height:1.18;font-weight:700;margin-bottom:18px;letter-spacing:-.01em;
}
.hero-sub{font-size:17px;color:var(--c-muted);line-height:1.8;max-width:520px;margin-bottom:30px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:22px;}
.plat-list{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:20px;}
.plat-btn{
  display:inline-flex;flex-direction:column;justify-content:center;
  min-width:112px;padding:9px 16px;border-radius:12px;border:1px solid var(--c-line);
  background:var(--c-surface);text-decoration:none;transition:all .18s var(--ease);
}
.plat-btn:hover{border-color:var(--c-primary);background:var(--c-accent-soft);transform:translateY(-2px);}
.plat-btn b{font-size:14px;color:var(--c-ink);font-weight:600;}
.plat-btn span{font-size:11px;color:var(--c-muted);font-family:ui-monospace,"SF Mono",Consolas,monospace;}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:16px 22px;padding:14px 18px;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-field);
  font-family:ui-monospace,"SF Mono",Consolas,monospace;font-size:13px;color:var(--c-muted);
}
.hero-meta b{color:var(--c-ink);font-weight:600;}
.hero-visual{position:relative;}
.hero-visual > img{
  width:100%;height:auto;border-radius:var(--r-card);
  border:1px solid var(--c-line);box-shadow:var(--sh-1);object-fit:cover;
}
.float-card{
  position:absolute;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-img);box-shadow:var(--sh-1);padding:12px 14px;display:flex;align-items:center;gap:10px;
}
.float-a{left:-18px;bottom:34px;}
.float-a .fc-num{font-size:24px;font-weight:700;color:var(--c-accent);font-family:ui-monospace,"SF Mono",Consolas,monospace;}
.float-a .fc-label{font-size:12px;color:var(--c-muted);line-height:1.4;}
.float-b{right:-14px;top:26px;padding:10px;max-width:210px;}
.float-b img{width:64px;height:44px;border-radius:8px;object-fit:cover;}
.float-b span{font-size:12px;color:var(--c-ink);font-weight:500;line-height:1.4;}

/* ---------- 通用板块 ---------- */
.sec{padding:96px 0;}
.sec.alt{background:var(--c-surface);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);}
.sec-head{max-width:760px;margin-bottom:44px;}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;letter-spacing:.06em;
  color:var(--c-primary);background:rgba(111,179,165,.16);padding:6px 12px;border-radius:999px;margin-bottom:14px;
}
.sec-head h2{font-size:clamp(24px,3vw,34px);line-height:1.28;font-weight:700;margin-bottom:12px;}
.sec-head p{font-size:15px;color:var(--c-muted);line-height:1.75;}
.sec-foot{margin-top:36px;display:flex;justify-content:center;}

/* ---------- 价值点 ---------- */
.value-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;}
.v-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:30px;box-shadow:var(--sh-1);transition:transform .2s var(--ease),box-shadow .2s var(--ease);
  display:flex;flex-direction:column;gap:12px;
}
.v-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);}
.v-card.wide{grid-column:span 7;}
.v-card.narrow{grid-column:span 5;}
.v-num{
  width:38px;height:38px;border-radius:11px;background:var(--c-accent-soft);color:var(--c-accent);
  display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;
  font-family:ui-monospace,"SF Mono",Consolas,monospace;
}
.v-card h3{font-size:20px;line-height:1.4;font-weight:600;}
.v-card p{font-size:15px;color:var(--c-muted);line-height:1.75;}
.v-card.with-img{padding:0;overflow:hidden;flex-direction:row;align-items:stretch;gap:0;}
.v-card.with-img .v-body{padding:30px;display:flex;flex-direction:column;gap:12px;flex:1 1 58%;}
.v-card.with-img img{flex:1 1 42%;min-height:100%;object-fit:cover;}
.v-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px;}
.tag{
  font-size:12px;font-weight:600;letter-spacing:.06em;color:var(--c-primary);
  background:rgba(111,179,165,.16);border-radius:999px;padding:4px 10px;
}
.tag.accent{color:var(--c-accent);background:var(--c-accent-soft);}

/* ---------- 轮播 ---------- */
.shot-carousel{position:relative;margin-top:8px;}
.shot-slide{display:grid;grid-template-columns:1fr;gap:18px;}
.shot-slide img{
  width:100%;height:auto;border-radius:var(--r-img);border:1px solid var(--c-line);
  object-fit:cover;background:var(--c-accent-soft);
}
.shot-caption{display:flex;flex-direction:column;gap:6px;padding:0 4px;}
.shot-caption h3{font-size:20px;font-weight:600;}
.shot-caption p{font-size:15px;color:var(--c-muted);}
.shot-carousel .carousel-control-prev,
.shot-carousel .carousel-control-next{
  position:absolute;top:calc(50% - 78px);bottom:auto;width:46px;height:46px;border-radius:50%;
  background:rgba(255,255,255,.94);border:1px solid var(--c-line);box-shadow:var(--sh-1);
  opacity:1;color:var(--c-primary);font-size:22px;line-height:1;display:flex;align-items:center;justify-content:center;
  transition:all .18s var(--ease);
}
.shot-carousel .carousel-control-prev{left:14px;}
.shot-carousel .carousel-control-next{right:14px;}
.shot-carousel .carousel-control-prev:hover,
.shot-carousel .carousel-control-next:hover{background:var(--c-accent);color:#fff;border-color:var(--c-accent);}
.shot-carousel .carousel-indicators{
  position:static;margin:22px 0 0;display:flex;justify-content:center;gap:10px;
}
.shot-carousel .carousel-indicators [data-bs-target]{
  width:48px;height:4px;border-radius:999px;background:var(--c-line);
  border:0;margin:0;opacity:1;flex:0 0 auto;transition:background .18s var(--ease);
}
.shot-carousel .carousel-indicators .active{background:var(--c-accent);}

/* ---------- 系统要求 ---------- */
.req-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.req-block{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:28px 30px;box-shadow:var(--sh-1);
}
.req-block h3{
  font-size:18px;font-weight:600;margin-bottom:16px;display:flex;align-items:center;gap:10px;
}
.req-block h3 i{
  width:10px;height:10px;border-radius:3px;background:var(--c-tint);display:inline-block;
}
.req-block.rec h3 i{background:var(--c-accent);}
.req-row{
  display:flex;justify-content:space-between;gap:16px;padding:11px 0;
  border-bottom:1px dashed var(--c-line);
  font-family:ui-monospace,"SF Mono",Consolas,monospace;font-size:13.5px;
}
.req-row:last-child{border-bottom:0;}
.req-row dt{color:var(--c-muted);flex:0 0 auto;margin:0;}
.req-row dd{margin:0;text-align:right;color:var(--c-ink);}
.req-row dd strong{color:var(--c-primary);font-weight:700;}

/* ---------- 评价墙 ---------- */
.review-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start;}
.review-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);transition:transform .18s var(--ease);
  display:flex;flex-direction:column;gap:12px;
}
.review-card:hover{transform:translateY(-2px);}
.review-grid > .review-card:nth-child(even){margin-top:34px;}
.rv-head{display:flex;align-items:center;gap:12px;}
.rv-avatar{
  width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,var(--c-primary),var(--c-tint));
  color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;flex:0 0 auto;
}
.rv-name{font-size:15px;font-weight:600;}
.rv-sub{font-size:12px;color:var(--c-muted);font-family:ui-monospace,"SF Mono",Consolas,monospace;}
.rv-body{font-size:15px;color:var(--c-muted);line-height:1.75;}
.stars{color:var(--c-accent);font-size:13px;letter-spacing:2px;}

/* ---------- 下载 CTA ---------- */
.cta-band{
  background:var(--c-primary-deep);color:#E8F1EE;border-radius:24px;padding:52px 48px;
  display:grid;grid-template-columns:1.15fr 1fr;gap:44px;align-items:center;position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-90px;top:-90px;width:300px;height:300px;border-radius:50%;
  border:1px solid rgba(111,179,165,.28);
}
.cta-band h2{color:#fff;font-size:clamp(24px,3vw,32px);line-height:1.3;font-weight:700;margin-bottom:14px;}
.cta-band p{color:rgba(232,241,238,.78);font-size:15px;line-height:1.8;max-width:520px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;position:relative;z-index:1;}
.cta-actions .btn-ghost{background:transparent;border-color:rgba(232,241,238,.36);color:#fff;}
.cta-actions .btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;color:#fff;}
.verify-card{
  background:rgba(255,255,255,.06);border:1px solid rgba(232,241,238,.2);border-radius:var(--r-card);
  padding:22px;position:relative;z-index:1;
}
.verify-card h3{color:#fff;font-size:16px;font-weight:600;margin-bottom:14px;}
.verify-row{
  display:flex;justify-content:space-between;gap:12px;padding:9px 0;
  border-bottom:1px dashed rgba(232,241,238,.2);
  font-family:ui-monospace,"SF Mono",Consolas,monospace;font-size:12.5px;color:rgba(232,241,238,.72);
}
.verify-row:last-child{border-bottom:0;}
.verify-row b{color:#fff;font-weight:600;word-break:break-all;text-align:right;}

/* ---------- 最新信息 ---------- */
.latest-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:36px;flex-wrap:wrap;
}
.latest-head h2{font-size:clamp(24px,3vw,34px);line-height:1.28;font-weight:700;margin-bottom:10px;}
.latest-head p{font-size:15px;color:var(--c-muted);}
.cms-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.cms-card{
  display:flex;flex-direction:column;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);text-decoration:none;color:inherit;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.cms-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);color:inherit;}
.cms-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--c-accent-soft);}
.cms-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease);}
.cms-card:hover .cms-thumb img{transform:scale(1.03);}
.cms-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto;}
.cms-cat{
  align-self:flex-start;font-size:12px;font-weight:600;letter-spacing:.06em;
  color:var(--c-primary);background:rgba(111,179,165,.16);border-radius:999px;padding:4px 10px;
}
.cms-body h3{
  font-size:17px;line-height:1.5;font-weight:600;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.cms-body p{
  font-size:14px;color:var(--c-muted);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.cms-foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding-top:12px;border-top:1px solid var(--c-line);
  font-size:13px;color:var(--c-muted);font-family:ui-monospace,"SF Mono",Consolas,monospace;
}
.cms-foot span{color:var(--c-accent);font-weight:600;font-family:inherit;}
.cms-empty{
  grid-column:1/-1;min-height:220px;border:1px dashed var(--c-line);border-radius:var(--r-card);
  background:rgba(111,179,165,.06);display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:14px;text-align:center;padding:28px;
}
.cms-empty svg{width:34px;height:34px;color:var(--c-tint);}
.cms-empty p{font-size:15px;color:var(--c-muted);}

/* ---------- FAQ ---------- */
.faq-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);
}
.faq-card .accordion-item{border:0;border-bottom:1px solid var(--c-line);background:transparent;}
.faq-card .accordion-item:last-child{border-bottom:0;}
.faq-card .accordion-button{
  background:transparent;color:var(--c-ink);font-size:16.5px;font-weight:600;line-height:1.6;
  padding:22px 26px 22px 30px;box-shadow:none;position:relative;
}
.faq-card .accordion-button::after{
  background-image:none;content:"+";font-size:22px;font-weight:400;color:var(--c-accent);
  width:22px;height:22px;line-height:20px;text-align:center;transform:none;
}
.faq-card .accordion-button:not(.collapsed){color:var(--c-primary);background:rgba(111,179,165,.08);}
.faq-card .accordion-button:not(.collapsed)::after{content:"−";}
.faq-card .accordion-button:not(.collapsed)::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;background:var(--c-accent);border-radius:0 3px 3px 0;
}
.faq-card .accordion-button:focus{box-shadow:none;}
.faq-card .accordion-body{
  padding:0 26px 24px 30px;font-size:15px;line-height:1.85;color:var(--c-muted);
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-primary-deep);color:#DCE9E5;padding:64px 0 0;margin-top:96px;}
.f-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px;}
.f-brand{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:#fff;margin-bottom:14px;}
.f-brand:hover{color:#fff;}
.f-brand .brand-mark{background:linear-gradient(135deg,var(--c-tint) 0%,#9CD3C8 100%);}
.f-desc{font-size:14px;line-height:1.8;color:rgba(220,233,229,.72);max-width:280px;}
.f-col h4{font-size:14px;font-weight:600;letter-spacing:.06em;color:#fff;margin-bottom:16px;}
.f-col a{display:block;font-size:14px;color:rgba(220,233,229,.78);padding:6px 0;}
.f-col a:hover{color:var(--c-accent);}
.f-bottom{
  margin-top:52px;border-top:1px solid rgba(220,233,229,.16);padding:22px 0;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  font-size:13px;color:rgba(220,233,229,.6);
}
.f-bottom .fb-links{display:flex;gap:18px;flex-wrap:wrap;}
.f-bottom a{color:rgba(220,233,229,.7);}
.f-bottom a:hover{color:var(--c-accent);}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .nav-link{padding:8px 9px;font-size:14px;}
  .hero-grid{gap:36px;}
}
@media (max-width:991.98px){
  .nav-main{display:none;}
  .hamburger{display:inline-flex;}
  .nav-search{display:none !important;}
  .hero{padding:calc(var(--nav-h) + 32px) 0 56px;}
  .hero-grid{grid-template-columns:1fr;gap:30px;min-height:auto;}
  .hero-visual{order:-1;}
  .hero-visual > img{max-height:260px;object-fit:cover;}
  .float-a{left:8px;bottom:12px;padding:9px 12px;}
  .float-a .fc-num{font-size:19px;}
  .float-b{right:8px;top:12px;padding:8px;}
  .float-b img{width:52px;height:36px;}
  .float-b span{font-size:11px;}
  .sec{padding:64px 0;}
  .v-card.wide,.v-card.narrow{grid-column:span 12;}
  .v-card.with-img{flex-direction:column;}
  .v-card.with-img img{min-height:180px;max-height:220px;}
  .req-grid{grid-template-columns:1fr;}
  .cta-band{grid-template-columns:1fr;padding:40px 30px;gap:30px;}
  .cms-grid{grid-template-columns:repeat(2,1fr);}
  .f-grid{grid-template-columns:1fr 1fr;}
  .site-footer{margin-top:64px;}
}
@media (max-width:767.98px){
  .sec{padding:56px 0;}
  .review-grid{grid-template-columns:1fr;}
  .review-grid > .review-card:nth-child(even){margin-top:0;}
}
@media (max-width:575.98px){
  .hero h1{font-size:28px;}
  .hero-actions .btn-main,.hero-actions .btn-ghost{width:100%;}
  .plat-list{flex-direction:column;}
  .plat-btn{width:100%;}
  .cms-grid{grid-template-columns:1fr;}
  .f-grid{grid-template-columns:1fr;gap:28px;}
  .btn-main,.btn-ghost{font-size:14.5px;}
  .cta-band{padding:32px 22px;border-radius:18px;}
  .shot-carousel .carousel-control-prev,
  .shot-carousel .carousel-control-next{display:none;}
}

/* roulang page: article */
:root{
  --c-ink:#14211F;
  --c-primary:#1F5F53;
  --c-primary-deep:#123A33;
  --c-tint:#6FB3A5;
  --c-accent:#E5764A;
  --c-accent-soft:#F6E3D8;
  --c-bg:#FAF7F2;
  --c-surface:#FFFFFF;
  --c-line:#E6DFD4;
  --c-muted:#6B7A75;
  --c-danger:#C4452F;
  --r-card:18px;
  --r-img:14px;
  --r-field:12px;
  --r-btn:999px;
  --sh-1:0 1px 2px rgba(20,33,31,.06),0 8px 24px -12px rgba(20,33,31,.18);
  --sh-2:0 18px 40px -18px rgba(20,33,31,.28);
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --bs-primary:#1F5F53;
  --bs-body-bg:#FAF7F2;
  --bs-body-color:#14211F;
  --bs-border-color:#E6DFD4;
  --bs-border-radius:12px;
  --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-ink);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:var(--c-primary);text-decoration:none;transition:color .18s cubic-bezier(.2,.7,.3,1),background-color .18s cubic-bezier(.2,.7,.3,1),border-color .18s cubic-bezier(.2,.7,.3,1)}
a:hover{color:var(--c-accent)}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
button{font:inherit;cursor:pointer}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:8px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;font-weight:600;font-size:15px;line-height:1;white-space:nowrap;transition:transform .18s cubic-bezier(.2,.7,.3,1),background-color .18s cubic-bezier(.2,.7,.3,1),box-shadow .18s cubic-bezier(.2,.7,.3,1),border-color .18s cubic-bezier(.2,.7,.3,1),color .18s cubic-bezier(.2,.7,.3,1)}
.btn-primary{height:50px;padding:0 26px;border-radius:var(--r-btn);background:var(--c-accent);color:#FFF8F2;box-shadow:var(--sh-1)}
.btn-primary:hover{background:#D9663B;color:#FFF8F2;transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{height:50px;padding:0 24px;border-radius:12px;border:1px solid var(--c-line);background:var(--c-surface);color:var(--c-primary)}
.btn-ghost:hover{border-color:var(--c-primary);background:var(--c-accent-soft);color:var(--c-primary)}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:12px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-primary)}
.link-arrow::after{content:"→";transition:transform .18s cubic-bezier(.2,.7,.3,1)}
.link-arrow:hover::after{transform:translateX(3px)}

/* ---------- 页头 ---------- */
.site-header{position:sticky;top:0;z-index:1030;background:rgba(250,247,242,.94);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--c-line)}
.nav-shell{display:flex;align-items:center;gap:18px;height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:var(--c-ink);flex:0 0 auto}
.brand:hover{color:var(--c-ink)}
.brand-mark{position:relative;width:26px;height:26px;border-radius:8px;background:var(--c-primary);flex:0 0 auto;box-shadow:inset 0 0 0 1px rgba(255,255,255,.22)}
.brand-mark::after{content:"";position:absolute;left:8px;top:8px;width:10px;height:10px;border-radius:3px;background:var(--c-accent);transform:rotate(45deg)}
.nav-main{display:flex;align-items:center;gap:2px;flex:1 1 auto;min-width:0;margin-left:8px}
.nav-main .nav-link{position:relative;padding:9px 12px;border-radius:10px;font-size:15px;color:#2C3A37;white-space:nowrap;transition:background-color .18s cubic-bezier(.2,.7,.3,1),color .18s cubic-bezier(.2,.7,.3,1)}
.nav-main .nav-link:hover{background:var(--c-accent-soft);color:var(--c-ink)}
.nav-main .nav-link.active{color:var(--c-ink);font-weight:600}
.nav-main .nav-link.active::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:var(--c-accent)}
.nav-side{display:flex;align-items:center;gap:10px;margin-left:auto;flex:0 0 auto}
.icon-btn{width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--c-line);border-radius:12px;background:var(--c-surface);color:var(--c-primary);transition:border-color .18s cubic-bezier(.2,.7,.3,1),background-color .18s cubic-bezier(.2,.7,.3,1)}
.icon-btn:hover{border-color:var(--c-primary);background:var(--c-accent-soft)}
.icon-btn svg{width:18px;height:18px}
.menu-toggle{display:none;width:40px;height:40px;align-items:center;justify-content:center;border:1px solid var(--c-line);border-radius:12px;background:var(--c-surface);color:var(--c-ink)}
.menu-toggle span{display:block;width:16px;height:2px;border-radius:2px;background:currentColor;position:relative}
.menu-toggle span::before,.menu-toggle span::after{content:"";position:absolute;left:0;width:16px;height:2px;border-radius:2px;background:currentColor}
.menu-toggle span::before{top:-5px}
.menu-toggle span::after{top:5px}

/* ---------- 面包屑 ---------- */
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-muted);overflow:hidden}
.crumb a{color:var(--c-muted)}
.crumb a:hover{color:var(--c-accent)}
.crumb .sep{color:#C6BEB1}
.crumb .current{color:#3B4A46;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:52ch}
.crumb-wrap{padding:22px 0 0}

/* ---------- 文章头部 ---------- */
.article-hero{position:relative;padding:18px 0 34px;background:#F2F6F3;border-bottom:1px solid var(--c-line);overflow:hidden}
.article-hero::after{content:"";position:absolute;inset:0;background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;opacity:.12;pointer-events:none}
.article-hero .container{position:relative;z-index:1}
.article-head{max-width:820px}
.badge-topic{display:inline-block;padding:5px 12px;border-radius:999px;background:rgba(111,179,165,.18);color:#1F5F53;font-size:12px;font-weight:600;letter-spacing:.06em}
.article-head h1{font-size:clamp(28px,3.6vw,42px);line-height:1.24;font-weight:700;margin:16px 0 0;letter-spacing:-.01em}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px 20px;margin-top:18px;font-size:13.5px;color:var(--c-muted)}
.meta-row .meta-item{display:inline-flex;align-items:center;gap:7px}
.meta-row .dot{width:6px;height:6px;border-radius:50%;background:var(--c-tint);flex:0 0 auto}
.meta-row time{font-family:var(--mono);letter-spacing:.01em}

/* ---------- 正文 ---------- */
.article-main{padding:52px 0 24px}
.article-wrap{max-width:760px;margin:0 auto}
.article-body{font-size:17px;line-height:1.9;color:#22312E;overflow-wrap:break-word}
.article-body > *:first-child{margin-top:0}
.article-body p{margin:0 0 1.1em}
.article-body h2{position:relative;font-size:clamp(21px,2.4vw,25px);line-height:1.42;font-weight:700;margin:44px 0 16px;padding-left:16px;color:var(--c-ink)}
.article-body h2::before{content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:4px;border-radius:2px;background:var(--c-primary)}
.article-body h3{font-size:20px;line-height:1.4;font-weight:600;margin:32px 0 12px;color:var(--c-ink)}
.article-body h4{font-size:17px;font-weight:600;margin:24px 0 10px}
.article-body a{color:var(--c-primary);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.article-body a:hover{color:var(--c-accent)}
.article-body strong{font-weight:700;color:var(--c-ink)}
.article-body blockquote{margin:26px 0;padding:18px 24px;background:#EAF3F0;border-left:3px solid var(--c-primary);border-radius:0 var(--r-img) var(--r-img) 0;color:#2C4A44;font-size:16.5px}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body ul, .article-body ol{margin:0 0 1.1em;padding-left:0}
.article-body ul li{position:relative;padding-left:22px;margin-bottom:9px}
.article-body ul li::before{content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;border-radius:2px;background:var(--c-tint)}
.article-body ol{counter-reset:olc;padding-left:0}
.article-body ol li{position:relative;padding-left:30px;margin-bottom:9px;counter-increment:olc}
.article-body ol li::before{content:counter(olc);position:absolute;left:0;top:.35em;width:20px;height:20px;display:flex;align-items:center;justify-content:center;border-radius:6px;background:var(--c-accent-soft);color:#A94F2C;font-size:12px;font-weight:700;font-family:var(--mono)}
.article-body img{border-radius:var(--r-img);margin:24px 0;width:100%;border:1px solid var(--c-line)}
.article-body figure{margin:24px 0}
.article-body figure img{margin:0}
.article-body figcaption{margin-top:10px;font-size:13px;color:var(--c-muted);text-align:center}
.article-body code{font-family:var(--mono);font-size:.875em;background:#F1EDE5;border:1px solid var(--c-line);padding:2px 6px;border-radius:6px;color:#2F4A44}
.article-body pre{margin:24px 0;padding:16px 18px;background:#F4F1EA;border:1px solid var(--c-line);border-radius:var(--r-img);overflow-x:auto;font-family:var(--mono);font-size:14px;line-height:1.7}
.article-body pre code{background:none;border:0;padding:0;font-size:14px}
.article-body table{display:block;width:100%;overflow-x:auto;border-collapse:collapse;margin:24px 0;font-size:15px;border:1px solid var(--c-line);border-radius:var(--r-img);background:var(--c-surface)}
.article-body th,.article-body td{padding:12px 16px;border-bottom:1px solid var(--c-line);text-align:left;white-space:nowrap}
.article-body th{background:#F4F1EA;font-weight:600;color:var(--c-ink)}
.article-body tr:last-child td{border-bottom:0}
.article-body hr{border:0;border-top:1px dashed var(--c-line);margin:36px 0}

/* ---------- 空态 ---------- */
.empty-state{margin:0 auto;max-width:640px;padding:56px 32px;text-align:center;background:var(--c-surface);border:1px dashed #D6CDBE;border-radius:var(--r-card)}
.empty-icon{display:inline-flex;align-items:center;justify-content:center;width:56px;height:56px;border-radius:16px;background:var(--c-accent-soft)}
.empty-icon::before{content:"";width:20px;height:20px;border:2px solid var(--c-accent);border-radius:50%;border-top-color:transparent;transform:rotate(-30deg)}
.empty-state h2{font-size:22px;font-weight:700;margin:18px 0 10px}
.empty-state p{font-size:15px;color:var(--c-muted);margin-bottom:22px}

/* ---------- 文末 ---------- */
.article-foot{max-width:760px;margin:44px auto 0;padding-top:24px;border-top:1px dashed var(--c-line);display:flex;flex-wrap:wrap;gap:14px 28px;font-size:14px}

/* ---------- 相关推荐 ---------- */
.related{padding:76px 0 20px}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px;flex-wrap:wrap}
.sec-head h2{font-size:clamp(22px,2.6vw,30px);line-height:1.3;font-weight:700}
.sec-head p{margin-top:8px;font-size:15px;color:var(--c-muted)}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.post-card{display:flex;flex-direction:column;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);transition:transform .18s cubic-bezier(.2,.7,.3,1),box-shadow .18s cubic-bezier(.2,.7,.3,1),border-color .18s cubic-bezier(.2,.7,.3,1)}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:#D8CFC0}
.post-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:#EDE8DF}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s cubic-bezier(.2,.7,.3,1)}
.post-card:hover .post-thumb img{transform:scale(1.03)}
.post-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.tag{padding:4px 10px;border-radius:999px;font-size:12px;font-weight:600;letter-spacing:.06em;background:rgba(111,179,165,.18);color:#1F5F53;align-self:flex-start}
.post-body h3{font-size:18px;line-height:1.45;font-weight:600}
.post-body h3 a{color:var(--c-ink)}
.post-body h3 a:hover{color:var(--c-primary)}
.post-body p{font-size:14px;line-height:1.65;color:var(--c-muted)}
.post-line{margin-top:auto;padding-top:12px;border-top:1px solid var(--c-line);display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--c-muted);font-family:var(--mono)}

/* ---------- 下载 CTA ---------- */
.dl-band{padding:76px 0}
.dl-inner{position:relative;overflow:hidden;background:var(--c-primary-deep);border-radius:24px;padding:44px 44px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;color:#EAF3F0}
.dl-inner::after{content:"";position:absolute;right:-70px;top:-70px;width:240px;height:240px;border-radius:50%;border:1px solid rgba(111,179,165,.32)}
.dl-inner h2{font-size:clamp(22px,2.6vw,30px);line-height:1.3;font-weight:700;color:#F7FBF9;position:relative;z-index:1}
.dl-inner p{margin-top:10px;font-size:15px;color:#A9C8C0;max-width:52ch;position:relative;z-index:1}
.dl-actions{display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:1}
.dl-inner .btn-ghost{background:transparent;border-color:rgba(234,243,240,.34);color:#EAF3F0}
.dl-inner .btn-ghost:hover{background:rgba(234,243,240,.12);border-color:#EAF3F0;color:#FFFFFF}
.dl-meta{margin-top:16px;font-family:var(--mono);font-size:13px;color:#8FB5AC;position:relative;z-index:1}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-primary-deep);color:#D6E5E0;padding:60px 0 0}
.f-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}
.f-brand{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:#F7FBF9}
.f-brand:hover{color:#FFFFFF}
.f-brand .brand-mark{background:#F7FBF9}
.f-brand .brand-mark::after{background:var(--c-accent)}
.f-desc{margin-top:14px;font-size:14px;line-height:1.75;color:#9EBDB6;max-width:34ch}
.f-col h4{font-size:14px;font-weight:700;color:#F7FBF9;letter-spacing:.04em;margin-bottom:14px}
.f-col a{display:block;font-size:14px;color:#9EBDB6;padding:5px 0}
.f-col a:hover{color:var(--c-accent)}
.f-bottom{margin-top:44px;padding:20px 0 24px;border-top:1px solid rgba(234,243,240,.14);display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:#8FB5AC}
.fb-links{display:flex;gap:20px;flex-wrap:wrap}
.fb-links a{color:#8FB5AC;font-size:13px}
.fb-links a:hover{color:var(--c-accent)}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .nav-main .nav-link{padding:9px 10px;font-size:14.5px}
  .card-grid{gap:20px}
}
@media (max-width:991.98px){
  .nav-shell{height:58px}
  .menu-toggle{display:inline-flex}
  .nav-main{position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);margin:0;padding:78px 20px 28px;background:var(--c-surface);flex-direction:column;align-items:stretch;gap:4px;transform:translateX(105%);transition:transform .28s cubic-bezier(.2,.7,.3,1);box-shadow:-24px 0 60px -28px rgba(20,33,31,.4);z-index:1050;overflow-y:auto}
  body.nav-open .nav-main{transform:translateX(0)}
  .nav-main .nav-link{padding:12px 14px;font-size:16px;border-radius:12px}
  .nav-main .nav-link.active{background:var(--c-accent-soft)}
  .nav-main .nav-link.active::after{display:none}
  body.nav-open{overflow:hidden}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
  .f-grid{grid-template-columns:1fr 1fr;gap:28px}
  .dl-inner{padding:34px 28px}
}
@media (max-width:767.98px){
  .article-main{padding:40px 0 12px}
  .related{padding:56px 0 12px}
  .dl-band{padding:56px 0}
  .article-body{font-size:16.5px}
  .article-body h2{margin-top:36px}
  .article-body table{font-size:14px}
  .article-body th,.article-body td{padding:10px 12px}
}
@media (max-width:575.98px){
  .container{padding:0 16px}
  .nav-side .btn-sm{display:none}
  .card-grid{grid-template-columns:1fr}
  .f-grid{grid-template-columns:1fr}
  .dl-actions{width:100%}
  .dl-actions .btn{width:100%}
  .empty-state{padding:40px 20px}
  .article-hero{padding:14px 0 26px}
  .crumb .current{max-width:26ch}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}

/* roulang page: category1 */
:root{
  --c-ink:#14211F;
  --c-primary:#1F5F53;
  --c-primary-deep:#123A33;
  --c-tint:#6FB3A5;
  --c-accent:#E5764A;
  --c-accent-soft:#F6E3D8;
  --c-bg:#FAF7F2;
  --c-surface:#FFFFFF;
  --c-line:#E6DFD4;
  --c-muted:#6B7A75;
  --c-danger:#C4452F;

  --r-card:18px;
  --r-img:14px;
  --r-field:12px;
  --r-btn:999px;

  --sh-1:0 1px 2px rgba(20,33,31,.06), 0 8px 24px -12px rgba(20,33,31,.18);
  --sh-2:0 18px 40px -18px rgba(20,33,31,.28);

  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:ui-monospace,"SF Mono",Consolas,"Liberation Mono",Menlo,monospace;

  --ease:cubic-bezier(.2,.7,.3,1);

  --bs-body-bg:#FAF7F2;
  --bs-body-color:#14211F;
  --bs-primary:#1F5F53;
  --bs-border-radius:14px;
  --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-ink);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--c-primary);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--c-accent)}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;line-height:1.3}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:6px}

.container{
  width:100%;
  max-width:1200px;
  margin-inline:auto;
  padding-inline:20px;
}

/* ---------- 顶栏 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1040;
  background:rgba(250,247,242,.94);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--c-line);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  height:64px;
}
.header-left{display:flex;align-items:center;gap:34px;min-width:0}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  font-weight:700;
  color:var(--c-ink);
  white-space:nowrap;
}
.brand:hover{color:var(--c-primary)}
.brand-mark{
  width:24px;height:24px;border-radius:7px;
  background:linear-gradient(135deg,var(--c-tint),var(--c-primary) 55%,var(--c-accent));
  box-shadow:0 2px 8px -3px rgba(18,58,51,.55);
  flex:none;
}
.nav-main{display:flex;align-items:center;gap:24px}
.nav-link{
  position:relative;
  font-size:14.5px;
  color:#3E4F4B;
  padding:6px 0;
  white-space:nowrap;
}
.nav-link:hover{color:var(--c-primary)}
.nav-link.active{color:var(--c-primary);font-weight:600}
.nav-link.active::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-2px;
  height:2px;
  border-radius:2px;
  background:var(--c-accent);
}
.header-right{display:flex;align-items:center;gap:12px}
.icon-btn{
  width:40px;height:40px;
  border-radius:var(--r-field);
  border:1px solid var(--c-line);
  background:var(--c-surface);
  color:var(--c-primary);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  transition:background .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.icon-btn:hover{border-color:var(--c-primary);background:var(--c-accent-soft);transform:translateY(-1px)}
.icon-btn:active{transform:translateY(1px)}
.hamburger{display:none}

/* 按钮体系 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:50px;
  padding:0 26px;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1;
  cursor:pointer;
  white-space:nowrap;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease);
}
.btn-main{background:var(--c-accent);color:#FFF6F1;box-shadow:0 8px 20px -12px rgba(229,118,74,.9)}
.btn-main:hover{background:#D4663B;color:#FFF6F1;transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-main:active{transform:translateY(1px)}
.btn-outline{background:var(--c-surface);border-color:var(--c-line);color:var(--c-primary)}
.btn-outline:hover{border-color:var(--c-primary);background:var(--c-accent-soft);color:var(--c-primary);transform:translateY(-2px)}
.btn-outline:active{transform:translateY(1px)}
.btn-onDark{background:transparent;border-color:rgba(239,234,226,.42);color:#EFEAE2}
.btn-onDark:hover{background:rgba(255,255,255,.1);border-color:var(--c-tint);color:#FFFFFF}
.btn-sm{height:40px;padding:0 18px;font-size:14px}

/* 移动端抽屉 */
.mobile-drawer{display:none;border-top:1px solid var(--c-line);background:var(--c-surface);padding:8px 20px 22px}
.mobile-drawer.open{display:block}
.mobile-drawer a{
  display:block;
  padding:13px 0;
  border-bottom:1px dashed var(--c-line);
  color:var(--c-ink);
  font-size:15px;
}
.mobile-drawer a.active{color:var(--c-primary);font-weight:600}
.mobile-drawer .drawer-cta{margin-top:18px;width:100%}

/* ---------- 首屏 ---------- */
.page-hero{
  position:relative;
  min-height:340px;
  display:flex;
  align-items:center;
  padding:52px 0;
  color:#F3EFE8;
  background-image:linear-gradient(96deg,rgba(18,58,51,.95) 0%,rgba(18,58,51,.82) 46%,rgba(18,58,51,.62) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
}
.crumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:rgba(243,239,232,.72);
  margin-bottom:18px;
  flex-wrap:wrap;
}
.crumb a{color:rgba(243,239,232,.86)}
.crumb a:hover{color:var(--c-accent)}
.crumb i{font-size:10px;opacity:.7}
.page-hero h1{
  font-size:clamp(30px,4.2vw,44px);
  line-height:1.18;
  color:#FFFFFF;
  max-width:760px;
}
.hero-lead{
  margin-top:18px;
  max-width:640px;
  font-size:16px;
  line-height:1.8;
  color:rgba(243,239,232,.82);
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.hero-tags span{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.04em;
  padding:7px 14px;
  border-radius:999px;
  background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.18);
  color:#EDE7DC;
}

/* ---------- 锚点条 ---------- */
.anchor-bar{
  position:sticky;
  top:64px;
  z-index:1020;
  background:rgba(250,247,242,.96);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--c-line);
}
.anchor-inner{
  display:flex;
  gap:10px;
  padding:12px 0;
  overflow-x:auto;
  scrollbar-width:none;
}
.anchor-inner::-webkit-scrollbar{display:none}
.anchor-inner a{
  flex:none;
  padding:8px 16px;
  border-radius:999px;
  border:1px solid var(--c-line);
  background:var(--c-surface);
  font-size:14px;
  color:var(--c-ink);
  transition:background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.anchor-inner a:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-accent-soft)}

/* ---------- 通用板块 ---------- */
.section{padding:72px 0}
.section-head{max-width:720px;margin-bottom:36px}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.1em;
  color:var(--c-primary);
  text-transform:uppercase;
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:22px;height:1px;
  background:var(--c-tint);
  display:inline-block;
}
h2{font-size:clamp(24px,3vw,34px);line-height:1.3;color:var(--c-ink)}
.section-head p{margin-top:14px;font-size:15px;line-height:1.8;color:var(--c-muted)}

/* 规格条 */
.spec-strip{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:1px;
  background:var(--c-line);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-1);
}
.spec-strip > div{background:var(--c-surface);padding:22px 24px}
.spec-strip dt{
  font-size:12px;
  font-weight:600;
  letter-spacing:.08em;
  color:var(--c-muted);
}
.spec-strip dd{
  margin:8px 0 0;
  font-family:var(--font-mono);
  font-size:15px;
  color:var(--c-ink);
}

/* 交错图文 */
.feature-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
  padding:56px 0;
}
.feature-row + .feature-row{border-top:1px dashed var(--c-line)}
.feature-row.reverse .fr-media{order:2}
.fr-media img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  border-radius:var(--r-img);
  border:1px solid var(--c-line);
  box-shadow:var(--sh-1);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.fr-media img:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.06em;
  padding:6px 13px;
  border-radius:999px;
  background:#EAF3F0;
  color:var(--c-primary);
}
.fr-body h3{margin-top:16px;font-size:20px;line-height:1.45;color:var(--c-ink)}
.fr-body > p{margin-top:14px;font-size:15.5px;line-height:1.85;color:#4A5A56}
.ticks{margin-top:18px}
.ticks li{
  position:relative;
  padding-left:22px;
  margin-top:10px;
  font-size:15px;
  color:#3E4F4B;
}
.ticks li::before{
  content:"";
  position:absolute;
  left:0;
  top:.7em;
  width:8px;height:8px;
  border-radius:2px;
  background:var(--c-tint);
}

/* 清单 */
.check-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:14px 34px;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  padding:32px 34px;
  box-shadow:var(--sh-1);
}
.check-grid li{
  position:relative;
  padding-left:28px;
  font-size:15px;
  color:#3E4F4B;
}
.check-grid li::before{
  content:"\f00c";
  font-family:"Font Awesome 6 Free";
  font-weight:900;
  font-size:11px;
  color:var(--c-accent);
  position:absolute;
  left:0;
  top:.35em;
  width:18px;height:18px;
  border-radius:50%;
  background:var(--c-accent-soft);
  display:inline-flex;
  align-items:center;
  justify-content:center;
}

/* CTA */
.cta-band{background:var(--c-primary-deep);color:#EFEAE2;padding:64px 0}
.cta-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:40px;
  flex-wrap:wrap;
}
.cta-inner h2{color:#FFFFFF;max-width:520px}
.cta-inner p{
  margin-top:14px;
  max-width:560px;
  font-size:15px;
  line-height:1.8;
  color:rgba(239,234,226,.76);
}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-primary-deep);color:#DCD6CC;padding:64px 0 0}
.f-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:40px;
}
.f-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:18px;
  font-weight:700;
  color:#FFFFFF;
}
.f-brand:hover{color:var(--c-accent)}
.f-desc{
  margin-top:16px;
  max-width:340px;
  font-size:14px;
  line-height:1.85;
  color:#B9B2A7;
}
.f-col h4{
  font-size:14px;
  color:#FFFFFF;
  margin-bottom:16px;
  letter-spacing:.04em;
}
.f-col a{
  display:block;
  padding:5px 0;
  font-size:14px;
  color:#C7C1B6;
}
.f-col a:hover{color:var(--c-accent)}
.f-bottom{
  margin-top:48px;
  padding:22px 0;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:#9E978C;
}
.fb-links{display:flex;gap:20px;flex-wrap:wrap}
.fb-links a{color:#9E978C}
.fb-links a:hover{color:var(--c-accent)}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .feature-row{gap:40px}
}
@media (max-width:991px){
  .nav-main{display:none}
  .hamburger{display:inline-flex}
  .search-btn{display:none}
  .header-inner{height:56px}
  .anchor-bar{top:56px}
  .section{padding:56px 0}
  .feature-row{grid-template-columns:1fr;gap:26px;padding:44px 0}
  .feature-row.reverse .fr-media{order:0}
  .spec-strip{grid-template-columns:1fr 1fr}
  .check-grid{grid-template-columns:1fr;padding:26px 24px}
  .f-grid{grid-template-columns:1fr 1fr;gap:32px}
  .page-hero{min-height:320px;padding:44px 0}
}
@media (max-width:575px){
  body{font-size:15.5px}
  .brand{font-size:16px}
  .header-cta{display:none}
  .spec-strip{grid-template-columns:1fr}
  .f-grid{grid-template-columns:1fr}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .f-bottom{flex-direction:column;align-items:flex-start}
  .page-hero h1{font-size:28px}
}

/* roulang page: category2 */
:root{
  --bs-primary:#1F5F53;
  --bs-body-bg:#FAF7F2;
  --bs-body-color:#14211F;
  --bs-border-radius:14px;
  --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;

  --c-ink:#14211F;
  --c-primary:#1F5F53;
  --c-primary-deep:#123A33;
  --c-tint:#6FB3A5;
  --c-accent:#E5764A;
  --c-accent-soft:#F6E3D8;
  --c-bg:#FAF7F2;
  --c-surface:#FFFFFF;
  --c-line:#E6DFD4;
  --c-muted:#6B7A75;
  --c-danger:#C4452F;

  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"SF Mono","JetBrains Mono",Consolas,monospace;

  --r-card:18px;
  --r-img:14px;
  --r-field:12px;

  --sh-1:0 1px 2px rgba(20,33,31,.06), 0 8px 24px -12px rgba(20,33,31,.18);
  --sh-2:0 18px 40px -18px rgba(20,33,31,.28);

  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1200px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--c-ink);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--c-primary);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--c-accent)}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--c-ink)}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}

/* ---------- 按钮 ---------- */
.btn{
  --bs-btn-border-radius:999px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:9px;
  height:50px;
  padding:0 26px;
  font-size:15px;
  font-weight:600;
  line-height:1;
  border-radius:999px;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
  white-space:nowrap;
}
.btn:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px}
.btn-main{background:var(--c-accent);color:#FFF9F5;border-color:var(--c-accent);box-shadow:0 10px 22px -14px rgba(229,118,74,.9)}
.btn-main:hover{background:#d96940;border-color:#d96940;color:#FFF9F5;transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-main:active{transform:translateY(1px)}
.btn-ghost{background:var(--c-surface);color:var(--c-primary);border-color:var(--c-line)}
.btn-ghost:hover{background:var(--c-accent-soft);border-color:var(--c-primary);color:var(--c-primary);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-text{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14.5px;font-weight:600;color:var(--c-primary);
  padding:6px 2px;border:0;background:none;cursor:pointer;
}
.btn-text i{transition:transform .18s var(--ease)}
.btn-text:hover{color:var(--c-accent)}
.btn-text:hover i{transform:translateX(4px)}

/* ---------- 通用标签 / 徽章 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;letter-spacing:.06em;
  padding:5px 12px;border-radius:999px;
  background:rgba(111,179,165,.18);color:#1B5B4F;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.12em;
  color:var(--c-accent);text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--c-accent);border-radius:2px}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(250,247,242,.94);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid var(--c-line);
}
.nav-wrap{display:flex;align-items:center;gap:20px;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--c-ink);flex-shrink:0}
.logo:hover{color:var(--c-primary)}
.logo-mark{
  width:24px;height:24px;border-radius:7px;
  background:linear-gradient(135deg,var(--c-primary),var(--c-tint));
  position:relative;flex-shrink:0;
}
.logo-mark::after{
  content:"";position:absolute;left:8px;top:6px;width:8px;height:12px;
  border-radius:3px;background:rgba(255,255,255,.9);
}
.nav-main{display:flex;align-items:center;gap:2px;flex:1 1 auto;min-width:0}
.nav-link{
  position:relative;
  padding:8px 12px;
  font-size:14.5px;
  color:#33443F;
  border-radius:9px;
  white-space:nowrap;
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.nav-link:hover{color:var(--c-primary);background:rgba(31,95,83,.07)}
.nav-link.active{color:var(--c-primary);font-weight:600}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;
  background:var(--c-accent);border-radius:2px;
}
.nav-right{display:flex;align-items:center;gap:10px;flex-shrink:0;margin-left:auto}
.icon-btn{
  width:40px;height:40px;border-radius:999px;
  border:1px solid var(--c-line);background:var(--c-surface);
  color:var(--c-primary);display:inline-flex;align-items:center;justify-content:center;
  cursor:pointer;transition:all .18s var(--ease);
}
.icon-btn:hover{border-color:var(--c-primary);background:var(--c-accent-soft);color:var(--c-primary)}
.nav-cta{height:42px;padding:0 20px;font-size:14px}
.menu-toggle{
  display:none;width:42px;height:42px;border-radius:12px;
  border:1px solid var(--c-line);background:var(--c-surface);
  color:var(--c-ink);align-items:center;justify-content:center;cursor:pointer;
}
.menu-toggle:hover{border-color:var(--c-primary);color:var(--c-primary)}

.drawer-mask{
  position:fixed;inset:0;z-index:1050;
  background:rgba(18,58,51,.45);
  opacity:0;visibility:hidden;transition:opacity .28s var(--ease),visibility .28s var(--ease);
}
.drawer-mask.open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;z-index:1060;
  width:min(320px,88vw);height:100%;
  background:var(--c-surface);
  padding:22px 22px 32px;
  display:flex;flex-direction:column;gap:6px;
  transform:translateX(102%);
  transition:transform .3s var(--ease);
  box-shadow:-24px 0 48px -24px rgba(20,33,31,.4);
  overflow-y:auto;
}
.drawer.open{transform:none}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.drawer-title{font-size:13px;font-weight:600;letter-spacing:.1em;color:var(--c-muted)}
.drawer a.d-link{
  display:flex;align-items:center;justify-content:space-between;
  padding:13px 14px;border-radius:12px;
  font-size:15px;color:var(--c-ink);border:1px solid transparent;
}
.drawer a.d-link:hover{background:var(--c-bg);color:var(--c-primary)}
.drawer a.d-link.active{background:var(--c-accent-soft);color:var(--c-primary);font-weight:600;border-color:rgba(229,118,74,.28)}
.drawer .btn{margin-top:18px;width:100%}

/* ---------- 页面 Hero ---------- */
.page-hero{
  position:relative;
  padding:64px 0 68px;
  color:#F5F1EA;
  background-image:linear-gradient(100deg,rgba(18,58,51,.92) 0%,rgba(18,58,51,.78) 52%,rgba(18,58,51,.6) 100%),url(/assets/images/backpic/back-1.webp);
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;right:-90px;bottom:-120px;
  width:320px;height:320px;border-radius:50%;
  border:1px solid rgba(111,179,165,.34);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2}
.crumb{
  display:flex;align-items:center;gap:9px;flex-wrap:wrap;
  font-size:13px;color:rgba(245,241,234,.72);margin-bottom:22px;
}
.crumb a{color:rgba(245,241,234,.82)}
.crumb a:hover{color:var(--c-accent)}
.crumb .sep{opacity:.5}
.crumb .cur{color:#F5F1EA;font-weight:600}
.page-hero h1{
  font-size:clamp(30px,4.2vw,46px);
  line-height:1.2;
  color:#FFFFFF;
  letter-spacing:-.01em;
  max-width:16em;
}
.page-hero .hero-sub{
  margin-top:18px;max-width:640px;
  font-size:16px;line-height:1.8;color:rgba(245,241,234,.82);
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.hero-tags span{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 14px;border-radius:999px;
  font-size:13px;font-family:var(--font-mono);
  color:#EAF3F0;background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.18);
}

/* ---------- 通用板块 ---------- */
.section{padding:72px 0}
.section-alt{background:#F4F0E8;border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.sec-head{max-width:720px;margin-bottom:44px}
.sec-head h2{font-size:clamp(24px,3vw,34px);line-height:1.28;margin:14px 0 12px}
.sec-head p{font-size:15px;line-height:1.8;color:var(--c-muted)}

/* ---------- 适用场景 ---------- */
.fit-grid{display:grid;grid-template-columns:0.85fr 1.15fr;gap:44px;align-items:center}
.fit-media{position:relative}
.fit-media img{
  width:100%;height:340px;object-fit:cover;
  border-radius:var(--r-card);border:1px solid var(--c-line);box-shadow:var(--sh-1);
}
.fit-media .float-card{
  position:absolute;right:-18px;bottom:-20px;
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-img);padding:14px 18px;box-shadow:var(--sh-1);
  display:flex;align-items:center;gap:12px;
}
.fit-media .float-card .num{font-family:var(--font-mono);font-size:22px;font-weight:700;color:var(--c-accent)}
.fit-media .float-card .lbl{font-size:12.5px;color:var(--c-muted);line-height:1.4}
.fit-list{display:flex;flex-direction:column;gap:0}
.fit-item{
  display:grid;grid-template-columns:44px 1fr;gap:18px;
  padding:20px 0;border-bottom:1px dashed var(--c-line);
}
.fit-item:first-child{padding-top:0}
.fit-item:last-child{border-bottom:0;padding-bottom:0}
.fit-item .idx{
  width:44px;height:44px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(31,95,83,.08);color:var(--c-primary);
  font-size:18px;
}
.fit-item h3{font-size:18px;margin-bottom:6px}
.fit-item p{font-size:14.5px;line-height:1.78;color:var(--c-muted)}

/* ---------- 时间轴 ---------- */
.timeline{display:flex;flex-direction:column;gap:26px}
.tl-item{position:relative;display:grid;grid-template-columns:96px 1fr;gap:26px;align-items:flex-start}
.tl-item::before{
  content:"";position:absolute;left:47px;top:100px;bottom:-26px;width:2px;
  background:linear-gradient(180deg,var(--c-line),rgba(230,223,212,.15));
}
.tl-item:last-child::before{display:none}
.tl-badge{
  width:96px;height:96px;border-radius:26px;
  background:var(--c-surface);border:1px solid var(--c-line);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);font-size:26px;font-weight:700;color:var(--c-primary);
  box-shadow:var(--sh-1);
}
.tl-card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  padding:26px 28px;
  display:grid;grid-template-columns:1fr 280px;gap:28px;align-items:center;
  box-shadow:var(--sh-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.tl-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.tl-body h3{font-size:20px;line-height:1.4;margin-bottom:10px}
.tl-body p{font-size:14.8px;line-height:1.8;color:var(--c-muted)}
.tl-body .meta{
  margin-top:14px;display:flex;flex-wrap:wrap;gap:8px;
}
.tl-body .meta span{
  font-family:var(--font-mono);font-size:12.5px;
  padding:4px 10px;border-radius:8px;
  background:var(--c-bg);border:1px solid var(--c-line);color:#3C4E48;
}
.tl-media img{
  width:100%;height:190px;object-fit:cover;
  border-radius:var(--r-img);border:1px solid var(--c-line);
}
.tl-item:nth-child(even) .tl-card{grid-template-columns:280px 1fr}
.tl-item:nth-child(even) .tl-media{order:-1}

/* ---------- 常见卡点 ---------- */
.pit-grid{display:grid;grid-template-columns:0.8fr 1.2fr;gap:44px;align-items:start}
.pit-intro h2{font-size:clamp(24px,3vw,32px);line-height:1.3;margin:14px 0 14px}
.pit-intro p{font-size:15px;line-height:1.85;color:var(--c-muted)}
.pit-list{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-1);overflow:hidden}
.pit-row{
  display:grid;grid-template-columns:52px 1fr;gap:18px;
  padding:22px 26px;border-bottom:1px solid var(--c-line);
  transition:background-color .18s var(--ease);
}
.pit-row:last-child{border-bottom:0}
.pit-row:hover{background:#FBF8F3}
.pit-row .pn{
  font-family:var(--font-mono);font-size:15px;font-weight:700;
  color:var(--c-accent);padding-top:2px;
}
.pit-row h3{font-size:16.5px;margin-bottom:6px}
.pit-row p{font-size:14.4px;line-height:1.78;color:var(--c-muted)}

/* ---------- 相关内链 ---------- */
.link-cards{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.link-card{
  display:flex;align-items:center;gap:20px;
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);padding:24px 26px;
  box-shadow:var(--sh-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.link-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(31,95,83,.35)}
.link-card .ico{
  width:48px;height:48px;border-radius:14px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:rgba(111,179,165,.18);color:var(--c-primary);font-size:19px;
}
.link-card h3{font-size:17px;color:var(--c-ink);margin-bottom:5px}
.link-card p{font-size:13.8px;color:var(--c-muted);line-height:1.7}
.link-card .go{margin-left:auto;color:var(--c-accent);font-size:15px;flex-shrink:0}

/* ---------- 下载 CTA ---------- */
.cta-band{
  background:var(--c-primary-deep);
  color:#F2EEE5;
  border-radius:24px;
  padding:52px 48px;
  display:grid;grid-template-columns:1.15fr 0.85fr;gap:40px;align-items:center;
  position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;left:-70px;top:-90px;width:260px;height:260px;border-radius:50%;
  border:1px solid rgba(111,179,165,.3);
}
.cta-band > *{position:relative;z-index:2}
.cta-band h2{font-size:clamp(23px,2.7vw,32px);line-height:1.3;color:#fff;margin-bottom:14px}
.cta-band p{font-size:14.8px;line-height:1.8;color:rgba(242,238,229,.78);max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.cta-meta{
  margin-top:20px;display:flex;flex-wrap:wrap;gap:10px 22px;
  font-family:var(--font-mono);font-size:12.8px;color:rgba(242,238,229,.7);
}
.cta-side{
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.14);
  border-radius:var(--r-card);
  padding:24px;
}
.cta-side .rowline{
  display:flex;justify-content:space-between;gap:14px;
  padding:11px 0;border-bottom:1px dashed rgba(255,255,255,.16);
  font-size:13.5px;
}
.cta-side .rowline:last-child{border-bottom:0}
.cta-side .rowline span:first-child{color:rgba(242,238,229,.68)}
.cta-side .rowline span:last-child{font-family:var(--font-mono);color:#fff;font-weight:600}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--c-primary-deep);
  color:#E8E2D6;
  padding:64px 0 0;
  margin-top:80px;
}
.f-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.f-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:#fff;margin-bottom:16px}
.f-brand:hover{color:var(--c-accent)}
.brand-mark{
  width:24px;height:24px;border-radius:7px;flex-shrink:0;
  background:linear-gradient(135deg,var(--c-tint),var(--c-accent));
}
.f-desc{font-size:14px;line-height:1.8;color:rgba(232,226,214,.72);max-width:330px;margin:0}
.f-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:14px;letter-spacing:.04em}
.f-col a{display:block;font-size:14px;color:rgba(232,226,214,.76);padding:5px 0}
.f-col a:hover{color:var(--c-accent)}
.f-bottom{
  margin-top:48px;
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 28px;
  display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(232,226,214,.62);
}
.fb-links{display:flex;gap:22px;flex-wrap:wrap}
.fb-links a{color:rgba(232,226,214,.62);font-size:13px}
.fb-links a:hover{color:var(--c-accent)}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .fit-grid{grid-template-columns:1fr;gap:36px}
  .fit-media img{height:300px}
  .pit-grid{grid-template-columns:1fr;gap:32px}
}
@media (max-width:991.98px){
  .nav-main{display:none}
  .menu-toggle{display:inline-flex}
  .nav-cta{display:none}
  .section{padding:56px 0}
  .tl-card{grid-template-columns:1fr 220px;gap:22px}
  .tl-item:nth-child(even) .tl-card{grid-template-columns:220px 1fr}
  .cta-band{grid-template-columns:1fr;padding:40px 30px;gap:28px}
  .f-grid{grid-template-columns:1fr 1fr;gap:34px}
  .link-cards{grid-template-columns:1fr}
}
@media (max-width:767.98px){
  .page-hero{padding:46px 0 50px}
  .hero-tags span{font-size:12px;padding:6px 11px}
  .tl-item{grid-template-columns:1fr;gap:14px}
  .tl-item::before{display:none}
  .tl-badge{width:62px;height:62px;border-radius:19px;font-size:19px}
  .tl-card,.tl-item:nth-child(even) .tl-card{grid-template-columns:1fr;padding:20px;gap:18px}
  .tl-item:nth-child(even) .tl-media{order:0}
  .tl-media img{height:170px}
  .fit-media img{height:230px}
  .fit-media .float-card{right:12px;bottom:-16px}
  .pit-row{grid-template-columns:1fr;gap:8px;padding:20px}
  .cta-band{padding:34px 22px;border-radius:18px}
  .f-grid{grid-template-columns:1fr;gap:30px}
  .f-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:575.98px){
  .container{padding:0 16px}
  .logo{font-size:16px}
  .btn{width:100%}
  .btn-sm{width:auto}
  .cta-actions .btn{width:100%}
  .fit-item{grid-template-columns:38px 1fr;gap:14px}
  .fit-item .idx{width:38px;height:38px;border-radius:12px;font-size:16px}
  .link-card{flex-wrap:wrap;gap:14px}
  .link-card .go{margin-left:0}
}

/* roulang page: category3 */
:root{
  --c-ink:#14211F;
  --c-primary:#1F5F53;
  --c-primary-deep:#123A33;
  --c-tint:#6FB3A5;
  --c-accent:#E5764A;
  --c-accent-soft:#F6E3D8;
  --c-bg:#FAF7F2;
  --c-surface:#FFFFFF;
  --c-line:#E6DFD4;
  --c-muted:#6B7A75;
  --c-danger:#C4452F;
  --r-card:18px;
  --r-img:14px;
  --r-field:12px;
  --r-btn:999px;
  --sh-1:0 1px 2px rgba(20,33,31,.06), 0 8px 24px -12px rgba(20,33,31,.18);
  --sh-2:0 18px 40px -18px rgba(20,33,31,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --bs-primary:#1F5F53;
  --bs-body-bg:#FAF7F2;
  --bs-body-color:#14211F;
  --bs-border-color:#E6DFD4;
  --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --bs-border-radius:12px;
  --bs-link-color:#1F5F53;
  --bs-link-hover-color:#E5764A;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-ink);
  font-family:var(--bs-font-sans-serif);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--c-primary);text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--c-accent);}
button{font-family:inherit;}
h1,h2,h3,h4,p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(250,247,242,.94);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid transparent;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.site-header.is-stuck{border-bottom-color:var(--c-line);box-shadow:0 6px 20px -16px rgba(20,33,31,.4);}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;min-height:64px;gap:18px;}
.nav-left{display:flex;align-items:center;gap:34px;min-width:0;}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--c-ink);letter-spacing:.01em;white-space:nowrap;}
.brand:hover{color:var(--c-primary);}
.brand-mark{
  width:24px;height:24px;border-radius:8px;flex:0 0 24px;
  background:linear-gradient(140deg,var(--c-primary) 0%,var(--c-tint) 100%);
  position:relative;box-shadow:0 4px 10px -6px rgba(31,95,83,.8);
}
.brand-mark::after{
  content:"";position:absolute;inset:7px;border-radius:3px;
  background:var(--c-bg);
}
.nav-main{display:flex;align-items:center;gap:26px;}
.nav-link{
  position:relative;padding:20px 0;font-size:15px;color:var(--c-ink);
  white-space:nowrap;font-weight:500;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:12px;height:2px;
  background:var(--c-accent);transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav-link:hover{color:var(--c-primary);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--c-primary);font-weight:700;}
.nav-link.active::after{transform:scaleX(1);}
.nav-right{display:flex;align-items:center;gap:12px;}
.icon-btn{
  width:40px;height:40px;border-radius:12px;border:1px solid var(--c-line);
  background:var(--c-surface);color:var(--c-ink);display:inline-flex;
  align-items:center;justify-content:center;font-size:15px;
  transition:all .18s var(--ease);
}
.icon-btn:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-accent-soft);}
.hamburger{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--c-line);
  background:var(--c-surface);color:var(--c-ink);align-items:center;justify-content:center;font-size:16px;
}
.hamburger:hover{border-color:var(--c-primary);color:var(--c-primary);}

/* mobile drawer */
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,33,31,.45);opacity:0;visibility:hidden;
  transition:opacity .25s var(--ease),visibility .25s var(--ease);z-index:1050;
}
.drawer-mask.show{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);background:var(--c-bg);
  z-index:1060;transform:translateX(102%);transition:transform .3s var(--ease);
  display:flex;flex-direction:column;padding:20px;overflow-y:auto;
  box-shadow:-20px 0 50px -30px rgba(20,33,31,.6);
}
.drawer.show{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer .nav-link{display:block;padding:14px 4px;border-bottom:1px solid var(--c-line);font-size:16px;}
.drawer .nav-link::after{display:none;}
.drawer .nav-link.active{color:var(--c-accent);}
.drawer-cta{margin-top:22px;display:grid;gap:10px;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-weight:600;font-size:16px;border-radius:var(--r-btn);
  border:1px solid transparent;padding:0 26px;height:50px;
  transition:all .18s var(--ease);cursor:pointer;line-height:1;
}
.btn-primary{
  background:var(--c-accent);color:#FDF8F4;box-shadow:0 10px 24px -14px rgba(229,118,74,.95);
  --bs-btn-bg:var(--c-accent);--bs-btn-border-color:var(--c-accent);--bs-btn-hover-bg:var(--c-accent);
}
.btn-primary:hover{background:#D8673B;color:#FDF8F4;transform:translateY(-2px);box-shadow:0 16px 32px -16px rgba(229,118,74,.95);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  background:var(--c-surface);color:var(--c-primary);border-color:var(--c-line);border-radius:12px;
}
.btn-ghost:hover{border-color:var(--c-primary);background:var(--c-accent-soft);color:var(--c-primary);}
.btn-ghost:active{transform:translateY(1px);}
.btn-line{
  background:transparent;color:var(--c-primary);border-color:var(--c-line);border-radius:12px;
  height:44px;font-size:15px;padding:0 20px;
}
.btn-line:hover{border-color:var(--c-primary);background:var(--c-accent-soft);color:var(--c-primary);}
.btn-sm{height:40px;font-size:14px;padding:0 18px;border-radius:12px;}
.text-link{
  display:inline-flex;align-items:center;gap:7px;font-weight:600;color:var(--c-primary);font-size:15px;
}
.text-link i{font-size:12px;transition:transform .2s var(--ease);}
.text-link:hover{color:var(--c-accent);}
.text-link:hover i{transform:translateX(4px);}

/* ---------- hero ---------- */
.page-hero{
  padding:36px 0 56px;
  background:
    radial-gradient(1200px 420px at 82% -10%, rgba(111,179,165,.16), transparent 62%),
    var(--c-bg);
  border-bottom:1px solid var(--c-line);
}
.crumb{display:flex;align-items:center;gap:9px;font-size:13px;color:var(--c-muted);margin-bottom:22px;flex-wrap:wrap;}
.crumb a{color:var(--c-muted);}
.crumb a:hover{color:var(--c-primary);}
.crumb i{font-size:10px;opacity:.7;}
.crumb .now{color:var(--c-ink);font-weight:600;}
.hero-grid{display:grid;grid-template-columns:5fr 7fr;gap:44px;align-items:center;}
.hero-copy h1{
  font-size:clamp(28px,3.8vw,44px);line-height:1.2;font-weight:700;letter-spacing:-.01em;
  margin-bottom:18px;
}
.hero-copy h1 .hl{color:var(--c-primary);}
.hero-sub{font-size:16px;color:var(--c-muted);line-height:1.85;max-width:520px;margin-bottom:26px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:22px;}
.meta-strip{
  display:flex;flex-wrap:wrap;gap:8px 18px;font-family:ui-monospace,"SF Mono",Consolas,monospace;
  font-size:13px;color:var(--c-muted);
}
.meta-strip span{display:inline-flex;align-items:center;gap:7px;}
.meta-strip i{color:var(--c-tint);font-size:12px;}
.hero-visual{position:relative;}
.hero-visual .shot{
  border-radius:var(--r-img);overflow:hidden;border:1px solid var(--c-line);
  box-shadow:var(--sh-1);background:var(--c-surface);
}
.hero-visual .shot img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/10;}
.float-card{
  position:absolute;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-img);box-shadow:var(--sh-1);padding:12px 15px;font-size:13px;
}
.float-card.one{left:-16px;bottom:26px;}
.float-card.two{right:-10px;top:24px;}
.float-card strong{display:block;font-family:ui-monospace,"SF Mono",Consolas,monospace;font-size:15px;color:var(--c-primary);}
.float-card span{color:var(--c-muted);font-size:12px;}

/* ---------- sections ---------- */
.section{padding:72px 0;}
.section.alt{background:var(--c-surface);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);}
.sec-head{max-width:760px;margin-bottom:34px;}
.sec-head h2{font-size:clamp(24px,3vw,32px);line-height:1.3;font-weight:700;margin-bottom:12px;}
.sec-head p{font-size:15px;color:var(--c-muted);line-height:1.8;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;letter-spacing:.06em;
  color:var(--c-primary);background:rgba(111,179,165,.16);border-radius:999px;padding:6px 14px;margin-bottom:16px;
}

/* platform matrix */
.platform-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.p-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);transition:transform .2s var(--ease),box-shadow .2s var(--ease);
  display:flex;flex-direction:column;gap:18px;
}
.p-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.p-top{display:flex;align-items:center;gap:14px;}
.p-icon{
  width:48px;height:48px;flex:0 0 48px;border-radius:14px;display:inline-flex;
  align-items:center;justify-content:center;font-size:21px;
  background:rgba(31,95,83,.08);color:var(--c-primary);border:1px solid rgba(31,95,83,.14);
}
.p-name{font-size:19px;font-weight:700;line-height:1.3;}
.p-tag{font-size:12px;color:var(--c-muted);letter-spacing:.02em;}
.p-data{
  display:grid;grid-template-columns:repeat(2,1fr);gap:10px 18px;
  font-family:ui-monospace,"SF Mono",Consolas,monospace;font-size:13px;
  padding:14px 16px;border-radius:var(--r-field);background:#F7F3EC;border:1px dashed var(--c-line);
}
.p-data dt{color:var(--c-muted);font-size:12px;font-family:var(--bs-font-sans-serif);margin-bottom:3px;}
.p-data dd{margin:0;color:var(--c-ink);font-weight:600;}
.p-card .btn{width:100%;}

/* verify block */
.verify-wrap{display:grid;grid-template-columns:7fr 5fr;gap:28px;align-items:start;}
.verify-box{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--sh-1);
}
.verify-box h3{font-size:19px;font-weight:700;margin-bottom:6px;}
.verify-box > p{font-size:14px;color:var(--c-muted);margin-bottom:18px;}
.hash-row{
  display:flex;flex-wrap:wrap;gap:6px 16px;align-items:baseline;padding:13px 2px;
  border-bottom:1px dashed var(--c-line);font-family:ui-monospace,"SF Mono",Consolas,monospace;font-size:13px;
}
.hash-row:last-child{border-bottom:none;}
.hash-row .os{min-width:96px;font-weight:600;color:var(--c-ink);font-family:var(--bs-font-sans-serif);}
.hash-row .val{color:var(--c-primary);font-weight:600;}
.hash-row .muted{color:var(--c-muted);}
.mirror-list li{
  display:flex;gap:12px;align-items:flex-start;padding:12px 0;border-bottom:1px dashed var(--c-line);font-size:14px;color:var(--c-muted);
}
.mirror-list li:last-child{border-bottom:none;}
.mirror-list i{color:var(--c-tint);margin-top:5px;font-size:13px;}
.mirror-list strong{color:var(--c-ink);display:block;font-weight:600;font-size:14px;}

/* requirements */
.req-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.req-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--sh-1);
}
.req-card.best{border-color:rgba(31,95,83,.35);box-shadow:0 1px 2px rgba(20,33,31,.06),0 16px 34px -20px rgba(31,95,83,.6);}
.req-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;}
.req-head h3{font-size:18px;}
.req-badge{
  font-size:12px;font-weight:600;letter-spacing:.04em;padding:5px 12px;border-radius:999px;
  background:rgba(111,179,165,.18);color:var(--c-primary);
}
.req-badge.accent{background:var(--c-accent-soft);color:#B2502C;}
.req-row{
  display:flex;justify-content:space-between;gap:16px;padding:12px 0;
  border-bottom:1px dashed var(--c-line);font-size:14px;
}
.req-row:last-child{border-bottom:none;}
.req-row .k{color:var(--c-muted);font-family:var(--bs-font-sans-serif);}
.req-row .v{font-family:ui-monospace,"SF Mono",Consolas,monospace;color:var(--c-ink);font-weight:600;text-align:right;}
.req-row .v.em{color:var(--c-primary);}

/* split feature */
.split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;}
.split.reverse .s-media{order:2;}
.s-media{border-radius:var(--r-img);overflow:hidden;border:1px solid var(--c-line);box-shadow:var(--sh-1);}
.s-media img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.s-copy h3{font-size:22px;font-weight:700;margin-bottom:14px;}
.s-copy p{font-size:15px;color:var(--c-muted);line-height:1.85;margin-bottom:16px;}
.check-list li{display:flex;gap:11px;align-items:flex-start;font-size:15px;padding:7px 0;color:var(--c-ink);}
.check-list i{color:var(--c-accent);margin-top:5px;font-size:13px;}
.split + .split{margin-top:52px;}

/* faq */
.faq-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;
}
.faq-item{border-bottom:1px solid var(--c-line);}
.faq-item:last-child{border-bottom:none;}
.faq-item summary{
  list-style:none;cursor:pointer;padding:20px 24px;font-size:16px;font-weight:600;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{background:#F7F3EC;color:var(--c-primary);}
.faq-item summary .sign{
  flex:0 0 26px;width:26px;height:26px;border-radius:50%;border:1px solid var(--c-line);
  display:inline-flex;align-items:center;justify-content:center;font-size:12px;color:var(--c-primary);
  transition:transform .22s var(--ease),background .22s var(--ease);
}
.faq-item[open] summary{color:var(--c-primary);background:#FBF8F3;}
.faq-item[open] summary .sign{transform:rotate(45deg);background:var(--c-accent-soft);border-color:var(--c-accent);color:#B2502C;}
.faq-body{padding:0 24px 22px;font-size:15px;color:var(--c-muted);line-height:1.85;border-left:3px solid transparent;}
.faq-item[open] .faq-body{border-left-color:var(--c-accent);margin-left:0;padding-left:21px;}

/* cta */
.cta-band{
  background:linear-gradient(135deg,var(--c-primary-deep) 0%,#16473E 60%,#1F5F53 100%);
  border-radius:24px;padding:52px 44px;color:#EFEAE3;position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-60px;width:260px;height:260px;border-radius:50%;
  border:1px solid rgba(111,179,165,.35);
}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:7fr 5fr;gap:34px;align-items:center;}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;margin-bottom:12px;color:#FFFFFF;}
.cta-band p{font-size:15px;color:rgba(239,234,227,.82);line-height:1.8;max-width:560px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end;}
.cta-band .btn-ghost{background:transparent;border-color:rgba(239,234,227,.35);color:#F3EFE9;}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.1);border-color:#F3EFE9;color:#FFFFFF;}
.cta-note{margin-top:18px;font-family:ui-monospace,"SF Mono",Consolas,monospace;font-size:12.5px;color:rgba(239,234,227,.65);}

/* footer */
.site-footer{background:var(--c-primary-deep);color:#DCD6CD;padding:64px 0 26px;margin-top:0;}
.f-grid{display:grid;grid-template-columns:1.6fr 1fr 1.2fr 1fr;gap:36px;}
.f-brand{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:#FFFFFF;margin-bottom:16px;}
.f-brand:hover{color:var(--c-accent);}
.f-brand .brand-mark{background:linear-gradient(140deg,var(--c-tint) 0%,var(--c-accent) 100%);}
.f-brand .brand-mark::after{background:var(--c-primary-deep);}
.f-desc{font-size:14px;line-height:1.8;color:rgba(220,214,205,.78);max-width:340px;}
.f-col h4{font-size:14px;font-weight:700;color:#FFFFFF;margin-bottom:16px;letter-spacing:.03em;}
.f-col a{display:block;font-size:14px;color:rgba(220,214,205,.82);padding:6px 0;transition:color .18s var(--ease),transform .18s var(--ease);}
.f-col a:hover{color:var(--c-accent);transform:translateX(3px);}
.f-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(220,214,205,.18);
  display:flex;flex-wrap:wrap;gap:12px 20px;justify-content:space-between;align-items:center;
  font-size:13px;color:rgba(220,214,205,.66);
}
.fb-links{display:flex;flex-wrap:wrap;gap:18px;}
.fb-links a{color:rgba(220,214,205,.7);}
.fb-links a:hover{color:var(--c-accent);}

/* responsive */
@media (max-width:1199px){
  .hero-grid{gap:34px;}
  .f-grid{grid-template-columns:1.6fr 1fr 1fr;gap:28px;}
}
@media (max-width:991px){
  .nav-main{display:none;}
  .hamburger{display:inline-flex;}
  .nav-wrap{min-height:56px;}
  .hero-grid{grid-template-columns:1fr;}
  .hero-visual{order:-1;}
  .hero-visual .shot img{aspect-ratio:16/9;}
  .float-card.two{display:none;}
  .float-card.one{left:12px;bottom:14px;}
  .section{padding:56px 0;}
  .platform-grid{grid-template-columns:1fr;}
  .verify-wrap{grid-template-columns:1fr;}
  .req-grid{grid-template-columns:1fr;}
  .split{grid-template-columns:1fr;gap:26px;}
  .split.reverse .s-media{order:0;}
  .cta-inner{grid-template-columns:1fr;}
  .cta-actions{justify-content:flex-start;}
  .cta-band{padding:38px 26px;}
  .f-grid{grid-template-columns:repeat(2,1fr);gap:26px;}
}
@media (max-width:575px){
  .container{padding:0 16px;}
  .page-hero{padding:22px 0 40px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .hero-copy h1{font-size:26px;}
  .c-card, .p-card, .req-card, .verify-box{padding:20px;}
  .faq-item summary{padding:17px 18px;font-size:15px;}
  .faq-body{padding:0 18px 18px;}
  .f-grid{grid-template-columns:1fr;}
  .f-bottom{flex-direction:column;align-items:flex-start;}
  .cta-band{border-radius:18px;padding:30px 20px;}
  .cta-actions .btn{width:100%;}
}

/* roulang page: category4 */
:root{
  --c-ink:#14211F;
  --c-primary:#1F5F53;
  --c-primary-deep:#123A33;
  --c-tint:#6FB3A5;
  --c-tint-soft:#E4F1ED;
  --c-accent:#E5764A;
  --c-accent-deep:#CE6238;
  --c-accent-soft:#F6E3D8;
  --c-bg:#FAF7F2;
  --c-surface:#FFFFFF;
  --c-line:#E6DFD4;
  --c-muted:#6B7A75;
  --c-danger:#C4452F;
  --r-card:18px;
  --r-img:14px;
  --r-field:12px;
  --r-btn:999px;
  --sh-1:0 1px 2px rgba(20,33,31,.06), 0 8px 24px -12px rgba(20,33,31,.18);
  --sh-2:0 18px 40px -18px rgba(20,33,31,.28);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:ui-monospace,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --bs-primary:#1F5F53;
  --bs-body-bg:#FAF7F2;
  --bs-body-color:#14211F;
  --bs-font-sans-serif:var(--font-sans);
  --bs-border-radius:18px;
  --bs-link-color:#1F5F53;
  --bs-link-hover-color:#123A33;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--c-ink);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:color .18s cubic-bezier(.2,.7,.3,1)}
button{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:6px}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.06em;
  color:var(--c-primary);
  background:var(--c-tint-soft);
  border-radius:999px;
  padding:6px 14px;
  text-transform:none;
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--c-accent);flex:0 0 6px}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1050;
  height:64px;
  background:rgba(250,247,242,.94);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid var(--c-line);
}
.header-inner{display:flex;align-items:center;gap:24px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;flex:0 0 auto}
.brand-mark{
  position:relative;width:26px;height:26px;border-radius:8px;
  background:linear-gradient(140deg,var(--c-primary) 0%,#2C7A6B 100%);
  box-shadow:0 4px 10px -4px rgba(31,95,83,.55);
}
.brand-mark::after{
  content:"";position:absolute;left:7px;top:7px;width:12px;height:12px;
  border-radius:3px;background:var(--c-accent);
}
.brand-text{white-space:nowrap}
.nav-main{display:flex;align-items:center;gap:2px;margin-right:auto;flex-wrap:nowrap}
.nav-link{
  position:relative;
  padding:9px 13px;
  font-size:15px;
  color:var(--c-ink);
  border-radius:10px;
  white-space:nowrap;
  transition:color .18s cubic-bezier(.2,.7,.3,1),background .18s cubic-bezier(.2,.7,.3,1);
}
.nav-link:hover{color:var(--c-primary);background:var(--c-accent-soft)}
.nav-link.active{color:var(--c-primary);font-weight:600}
.nav-link.active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:1px;height:2px;
  background:var(--c-accent);border-radius:2px;
}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.icon-btn{
  width:40px;height:40px;display:grid;place-items:center;
  border:1px solid var(--c-line);background:var(--c-surface);
  border-radius:12px;color:var(--c-primary);cursor:pointer;
  transition:border-color .18s cubic-bezier(.2,.7,.3,1),background .18s cubic-bezier(.2,.7,.3,1),transform .18s cubic-bezier(.2,.7,.3,1);
}
.icon-btn:hover{border-color:var(--c-primary);background:var(--c-accent-soft)}
.icon-btn:active{transform:translateY(1px)}
.btn-cta-sm{
  display:inline-flex;align-items:center;gap:8px;
  height:40px;padding:0 20px;border-radius:var(--r-btn);
  background:var(--c-accent);color:#FFF8F3;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;
  transition:background .18s cubic-bezier(.2,.7,.3,1),transform .18s cubic-bezier(.2,.7,.3,1),box-shadow .18s cubic-bezier(.2,.7,.3,1);
  box-shadow:0 6px 16px -8px rgba(229,118,74,.7);
}
.btn-cta-sm:hover{background:var(--c-accent-deep);transform:translateY(-2px);box-shadow:0 12px 24px -12px rgba(229,118,74,.85)}
.btn-cta-sm:active{transform:translateY(1px)}
.hamburger{
  display:none;width:40px;height:40px;border-radius:12px;
  border:1px solid var(--c-line);background:var(--c-surface);
  cursor:pointer;place-items:center;
}
.hamburger span{display:block;width:16px;height:1.6px;background:var(--c-primary);border-radius:2px;position:relative}
.hamburger span::before,.hamburger span::after{
  content:"";position:absolute;left:0;width:16px;height:1.6px;background:var(--c-primary);border-radius:2px;
}
.hamburger span::before{top:-5px}
.hamburger span::after{top:5px}
/* 搜索条 */
.search-bar{
  display:none;border-bottom:1px solid var(--c-line);
  background:rgba(250,247,242,.98);
}
.search-bar.open{display:block}
.search-bar .container{display:flex;gap:10px;padding-top:12px;padding-bottom:12px}
.search-bar input{
  flex:1;height:44px;border:1px solid var(--c-line);border-radius:var(--r-field);
  background:var(--c-surface);padding:0 16px;font-size:15px;color:var(--c-ink);
}
.search-bar input:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(229,118,74,.18)}
/* 移动抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(18,58,51,.42);
  opacity:0;pointer-events:none;transition:opacity .22s ease;z-index:1060;
}
.drawer-mask.open{opacity:1;pointer-events:auto}
.nav-drawer{
  position:fixed;top:0;right:0;height:100%;width:min(84vw,320px);
  background:var(--c-bg);z-index:1070;
  transform:translateX(102%);
  transition:transform .28s cubic-bezier(.2,.7,.3,1);
  padding:20px;display:flex;flex-direction:column;gap:6px;
  border-left:1px solid var(--c-line);overflow-y:auto;
}
.nav-drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.drawer-close{
  width:36px;height:36px;border-radius:10px;border:1px solid var(--c-line);
  background:var(--c-surface);cursor:pointer;display:grid;place-items:center;color:var(--c-primary);
}
.drawer-link{
  padding:13px 14px;border-radius:12px;font-size:16px;border:1px solid transparent;
}
.drawer-link:hover{background:var(--c-accent-soft)}
.drawer-link.active{background:var(--c-tint-soft);color:var(--c-primary);font-weight:600;border-color:#CDE5DE}
.drawer-cta{
  margin-top:14px;display:flex;align-items:center;justify-content:center;
  height:50px;border-radius:var(--r-btn);background:var(--c-accent);color:#FFF8F3;font-weight:600;
}

/* ============ 面包屑 ============ */
.crumb{padding:22px 0 0;font-size:14px;color:var(--c-muted)}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;list-style:none;margin:0;padding:0}
.crumb a{color:var(--c-muted)}
.crumb a:hover{color:var(--c-primary)}
.crumb .sep{opacity:.5}
.crumb .here{color:var(--c-ink);font-weight:600}

/* ============ 页面 Hero ============ */
.page-hero{position:relative;padding:32px 0 0}
.hero-grid{
  display:grid;grid-template-columns:5fr 6fr;gap:48px;align-items:center;
  min-height:340px;padding:28px 0 44px;
}
.hero-copy h1{
  font-size:clamp(30px,4.6vw,46px);
  line-height:1.18;font-weight:700;margin:18px 0 0;
}
.hero-copy h1 em{
  font-style:normal;color:var(--c-primary);
  background:linear-gradient(transparent 64%,rgba(111,179,165,.35) 64%);
}
.hero-sub{
  margin-top:18px;font-size:17px;line-height:1.8;color:#3D4C48;max-width:560px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.btn-main{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:50px;padding:0 28px;border-radius:var(--r-btn);
  background:var(--c-accent);color:#FFF8F3;font-size:16px;font-weight:600;
  border:1px solid transparent;cursor:pointer;
  box-shadow:0 10px 24px -12px rgba(229,118,74,.8);
  transition:background .18s cubic-bezier(.2,.7,.3,1),transform .18s cubic-bezier(.2,.7,.3,1),box-shadow .18s cubic-bezier(.2,.7,.3,1);
}
.btn-main:hover{background:var(--c-accent-deep);transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-main:active{transform:translateY(1px)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:50px;padding:0 26px;border-radius:12px;
  background:var(--c-surface);border:1px solid var(--c-line);color:var(--c-primary);
  font-size:16px;font-weight:600;cursor:pointer;
  transition:border-color .18s cubic-bezier(.2,.7,.3,1),background .18s cubic-bezier(.2,.7,.3,1),transform .18s cubic-bezier(.2,.7,.3,1);
}
.btn-ghost:hover{border-color:var(--c-primary);background:var(--c-accent-soft);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(1px)}
.hero-ver{
  margin-top:22px;display:flex;flex-wrap:wrap;gap:10px 22px;
  font-family:var(--font-mono);font-size:13px;color:var(--c-muted);
}
.hero-ver b{color:var(--c-primary);font-weight:600}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;border-radius:var(--r-img);border:1px solid var(--c-line);
  box-shadow:var(--sh-1);object-fit:cover;aspect-ratio:16/10;background:var(--c-tint-soft);
}
.float-card{
  position:absolute;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-img);box-shadow:var(--sh-1);padding:12px 16px;
}
.float-card.q1{left:-18px;bottom:34px}
.float-card.q2{right:-12px;top:26px}
.fc-label{font-size:12px;color:var(--c-muted);letter-spacing:.04em}
.fc-value{font-family:var(--font-mono);font-size:16px;font-weight:600;color:var(--c-primary)}
.fc-value.accent{color:var(--c-accent)}

/* ============ 状态条 ============ */
.status-band{
  background:var(--c-primary-deep);
  border-radius:var(--r-card);
  padding:18px 24px;
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:16px;
  margin-bottom:8px;
}
.status-item{display:flex;align-items:center;gap:12px;color:#EAF3F0}
.status-item .pulse{
  width:10px;height:10px;border-radius:50%;background:var(--c-tint);flex:0 0 10px;
  box-shadow:0 0 0 0 rgba(111,179,165,.7);
  animation:pulse 2.4s infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(111,179,165,.6)}
  70%{box-shadow:0 0 0 12px rgba(111,179,165,0)}
  100%{box-shadow:0 0 0 0 rgba(111,179,165,0)}
}
.status-item .s-label{font-size:14px;opacity:.86}
.status-item .s-value{font-family:var(--font-mono);font-size:13px;color:var(--c-tint);margin-left:auto}

/* ============ 通用板块 ============ */
.section{padding:72px 0 0}
.section-head{max-width:720px;margin-bottom:32px}
.section-head h2{font-size:clamp(24px,3vw,34px);line-height:1.28}
.section-head p{margin-top:12px;font-size:15px;color:var(--c-muted);max-width:640px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head.center p{margin-left:auto;margin-right:auto}

/* ============ FAQ ============ */
.faq-group{margin-bottom:26px}
.faq-group-title{
  display:flex;align-items:center;gap:12px;margin-bottom:14px;
}
.faq-group-title h3{font-size:20px;line-height:1.4}
.faq-group-title .num{
  width:30px;height:30px;flex:0 0 30px;border-radius:10px;
  display:grid;place-items:center;
  font-family:var(--font-mono);font-size:13px;font-weight:600;
  background:var(--c-tint-soft);color:var(--c-primary);border:1px solid #CDE5DE;
}
.accordion{--bs-accordion-bg:transparent;--bs-accordion-border-color:transparent;--bs-accordion-border-radius:0}
.faq-card{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
}
.faq-card .accordion-item{
  border:0;border-bottom:1px solid var(--c-line);background:transparent;
  position:relative;transition:background .18s ease;
}
.faq-card .accordion-item:last-child{border-bottom:0}
.faq-card .accordion-item:has(.accordion-button:not(.collapsed)){background:#FCFAF6}
.faq-card .accordion-item:has(.accordion-button:not(.collapsed))::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--c-accent);
}
.accordion-button{
  width:100%;display:flex;align-items:center;gap:16px;
  padding:20px 24px;font-size:16px;font-weight:600;color:var(--c-ink);
  background:transparent;border:0;text-align:left;cursor:pointer;
  transition:color .18s cubic-bezier(.2,.7,.3,1);
}
.accordion-button:hover{color:var(--c-primary)}
.accordion-button:not(.collapsed){color:var(--c-primary);font-weight:700;box-shadow:none}
.accordion-button:focus{box-shadow:none;outline:none}
.accordion-button:focus-visible{outline:2px solid var(--c-accent);outline-offset:-2px}
.accordion-button::after{display:none}
.acc-icon{
  position:relative;width:18px;height:18px;flex:0 0 18px;margin-left:auto;
}
.acc-icon::before,.acc-icon::after{
  content:"";position:absolute;background:var(--c-primary);border-radius:2px;
  transition:transform .2s cubic-bezier(.2,.7,.3,1),background .2s ease;
}
.acc-icon::before{left:0;top:8px;width:18px;height:2px}
.acc-icon::after{left:8px;top:0;width:2px;height:18px;transform-origin:center}
.accordion-button:not(.collapsed) .acc-icon::after{transform:scaleY(0)}
.accordion-button:not(.collapsed) .acc-icon::before{background:var(--c-accent)}
.accordion-body{
  padding:0 24px 22px 24px;font-size:15px;line-height:1.85;color:#43524E;
}
.accordion-body strong{color:var(--c-ink)}
.accordion-body .tip-list{margin-top:10px;display:grid;gap:8px}
.accordion-body .tip-list li{
  position:relative;padding-left:18px;font-size:14px;color:#43524E;
}
.accordion-body .tip-list li::before{
  content:"";position:absolute;left:0;top:9px;width:7px;height:7px;
  background:var(--c-tint);border-radius:2px;
}
.code-line{
  display:block;font-family:var(--font-mono);font-size:13px;
  background:#F3F0EA;border:1px solid var(--c-line);border-radius:10px;
  padding:9px 12px;margin-top:10px;color:var(--c-primary);overflow-x:auto;white-space:nowrap;
}

/* ============ 评价墙 ============ */
.wall{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start}
.wall-col{display:grid;gap:24px}
.wall-col.offset{margin-top:34px}
.quote-card{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);padding:24px;box-shadow:var(--sh-1);
  transition:transform .2s cubic-bezier(.2,.7,.3,1),box-shadow .2s cubic-bezier(.2,.7,.3,1);
}
.quote-card:hover{transform:translateY(-2px);box-shadow:0 18px 40px -18px rgba(20,33,31,.28)}
.quote-top{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.avatar{
  width:42px;height:42px;flex:0 0 42px;border-radius:50%;
  display:grid;place-items:center;font-weight:700;font-size:15px;color:#FFF8F3;
}
.av-1{background:linear-gradient(140deg,#1F5F53,#2E8171)}
.av-2{background:linear-gradient(140deg,#E5764A,#C95F35)}
.av-3{background:linear-gradient(140deg,#3E7C70,#6FB3A5)}
.av-4{background:linear-gradient(140deg,#8A6A4F,#B78763)}
.quote-name{font-weight:600;font-size:15px}
.quote-meta{font-size:12px;color:var(--c-muted);font-family:var(--font-mono)}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;letter-spacing:.06em;
  padding:4px 10px;border-radius:999px;
  background:var(--c-tint-soft);color:var(--c-primary);
}
.quote-body{font-size:15px;line-height:1.8;color:#43524E}
.stars{display:flex;gap:3px;margin-top:14px;color:var(--c-accent)}

/* ============ 表单 ============ */
.support-panel{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);box-shadow:var(--sh-1);
  display:grid;grid-template-columns:5fr 7fr;overflow:hidden;
}
.support-aside{
  background:linear-gradient(160deg,#17453C 0%,#123A33 100%);
  color:#EAF3F0;padding:36px 32px;display:flex;flex-direction:column;gap:18px;
  position:relative;overflow:hidden;
}
.support-aside::after{
  content:"";position:absolute;right:-70px;bottom:-70px;width:220px;height:220px;
  border:1px solid rgba(111,179,165,.35);border-radius:50%;
}
.support-aside::before{
  content:"";position:absolute;right:-30px;bottom:-30px;width:130px;height:130px;
  border:1px solid rgba(229,118,74,.4);border-radius:50%;
}
.support-aside h3{font-size:20px;color:#FFFFFF}
.support-aside p{font-size:14px;line-height:1.8;color:rgba(234,243,240,.82)}
.aside-list{display:grid;gap:12px;margin-top:auto;position:relative;z-index:1}
.aside-list li{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:rgba(234,243,240,.9)}
.aside-list li .sq{
  width:8px;height:8px;flex:0 0 8px;border-radius:2px;background:var(--c-accent);margin-top:9px;
}
.aside-code{
  font-family:var(--font-mono);font-size:12px;color:var(--c-tint);
  background:rgba(255,255,255,.07);border:1px solid rgba(111,179,165,.3);
  border-radius:10px;padding:8px 12px;margin-top:14px;position:relative;z-index:1;
}
.support-form{padding:36px 32px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{margin-bottom:18px}
.field label{
  display:block;font-size:14px;font-weight:600;margin-bottom:8px;color:var(--c-ink);
}
.field label .req{color:var(--c-accent);margin-left:2px}
.form-control,.form-select{
  width:100%;height:48px;border:1px solid var(--c-line);border-radius:var(--r-field);
  background:var(--c-surface);padding:0 15px;font-size:15px;color:var(--c-ink);
  box-shadow:none;transition:border-color .18s ease,box-shadow .18s ease;
  font-family:var(--font-sans);
}
textarea.form-control{height:auto;min-height:132px;padding:13px 15px;line-height:1.75;resize:vertical}
.form-control::placeholder{color:#A6B0AC}
.form-control:focus,.form-select:focus{
  border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(229,118,74,.18);outline:none;
}
.form-control.is-invalid,.form-select.is-invalid{
  border-color:var(--c-danger);box-shadow:0 0 0 3px rgba(196,69,47,.14);
}
.form-err{
  display:none;margin-top:7px;font-size:13px;color:var(--c-danger);
}
.form-err.show{display:block}
.form-hint{margin-top:8px;font-size:13px;color:var(--c-muted)}
.form-foot{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:8px}
.form-note{font-size:13px;color:var(--c-muted);flex:1;min-width:200px}
.form-success{
  display:none;margin-top:16px;padding:14px 16px;border-radius:var(--r-field);
  background:var(--c-tint-soft);border:1px solid #CDE5DE;color:var(--c-primary);
  font-size:14px;line-height:1.7;
}
.form-success.show{display:block}

/* ============ CTA ============ */
.cta-band{
  margin-top:72px;
  background:linear-gradient(135deg,#1B5347 0%,#123A33 100%);
  border-radius:24px;
  padding:44px 40px;
  color:#EAF3F0;
  display:grid;grid-template-columns:1.4fr 1fr;gap:32px;align-items:center;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-90px;top:-90px;width:280px;height:280px;
  border:1px solid rgba(111,179,165,.28);border-radius:50%;
}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);line-height:1.3;color:#FFFFFF}
.cta-band p{margin-top:12px;font-size:15px;line-height:1.8;color:rgba(234,243,240,.82);max-width:520px}
.cta-actions{display:flex;flex-direction:column;gap:14px;position:relative;z-index:1}
.btn-light{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:52px;border-radius:var(--r-btn);background:var(--c-accent);color:#FFF8F3;
  font-size:16px;font-weight:600;border:1px solid transparent;cursor:pointer;
  box-shadow:0 12px 26px -14px rgba(0,0,0,.5);
  transition:background .18s cubic-bezier(.2,.7,.3,1),transform .18s cubic-bezier(.2,.7,.3,1);
}
.btn-light:hover{background:var(--c-accent-deep);transform:translateY(-2px)}
.btn-outline-light2{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:52px;border-radius:12px;background:transparent;color:#EAF3F0;
  border:1px solid rgba(234,243,240,.4);font-size:16px;font-weight:600;cursor:pointer;
  transition:border-color .18s ease,background .18s ease,transform .18s ease;
}
.btn-outline-light2:hover{border-color:var(--c-tint);background:rgba(111,179,165,.14);transform:translateY(-2px)}
.cta-meta{
  display:flex;flex-wrap:wrap;gap:8px 20px;font-family:var(--font-mono);
  font-size:12px;color:rgba(234,243,240,.66);position:relative;z-index:1;
}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:72px;background:var(--c-primary-deep);color:#EAF3F0;
  padding:56px 0 0;
}
.f-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}
.f-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:#FFFFFF}
.f-brand .brand-mark{background:linear-gradient(140deg,#2C7A6B,#6FB3A5)}
.f-desc{margin-top:14px;font-size:14px;line-height:1.8;color:rgba(234,243,240,.72);max-width:340px}
.f-col h4{font-size:15px;color:#FFFFFF;margin-bottom:14px;font-weight:600}
.f-col a{display:block;font-size:14px;color:rgba(234,243,240,.74);padding:5px 0}
.f-col a:hover{color:var(--c-accent)}
.f-bottom{
  margin-top:44px;border-top:1px solid rgba(234,243,240,.14);
  padding:20px 0 26px;display:flex;flex-wrap:wrap;gap:12px;
  justify-content:space-between;align-items:center;
  font-size:13px;color:rgba(234,243,240,.6);
}
.fb-links{display:flex;gap:20px}
.fb-links a:hover{color:var(--c-accent)}
.fb-links a{color:rgba(234,243,240,.6)}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .container{max-width:1000px}
  .nav-main{gap:0}
  .nav-link{padding:9px 10px;font-size:14px}
}
@media (max-width:991px){
  .nav-main{display:none}
  .hamburger{display:grid}
  .header-actions .btn-cta-sm{display:none}
  .hero-grid{grid-template-columns:1fr;gap:32px;padding:12px 0 32px;min-height:0}
  .hero-visual img{aspect-ratio:16/9}
  .float-card.q1{left:12px;bottom:-16px}
  .float-card.q2{right:12px;top:-14px}
  .status-band{grid-template-columns:1fr;gap:14px}
  .support-panel{grid-template-columns:1fr}
  .support-aside{order:2}
  .support-form{order:1}
  .cta-band{grid-template-columns:1fr;padding:34px 26px}
  .f-grid{grid-template-columns:1fr 1fr;gap:28px}
  .wall{grid-template-columns:1fr}
  .wall-col.offset{margin-top:0}
}
@media (max-width:767px){
  .section{padding:56px 0 0}
  .cta-band{margin-top:56px}
  .site-footer{margin-top:56px}
  .form-row{grid-template-columns:1fr}
  .accordion-button{padding:18px 18px;font-size:15px}
  .accordion-body{padding:0 18px 18px}
  .quote-card{padding:20px}
  .support-form{padding:26px 20px}
  .support-aside{padding:28px 22px}
  .f-grid{grid-template-columns:1fr}
  .f-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:575px){
  .container{padding:0 16px}
  .header-inner{gap:12px}
  .brand{font-size:16px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .btn-main,.btn-ghost{width:100%}
  .hero-copy h1{font-size:28px}
  .float-card.q2{display:none}
  .status-band{padding:16px 18px}
  .cta-actions .btn-light,.cta-actions .btn-outline-light2{width:100%}
}