/* roulang page: index */
:root{
  --ink:#12302E;
  --ink-deep:#0B211F;
  --ink-2:#1E4A45;
  --ink-3:#2F6A63;
  --teal:#14C8A0;
  --teal-deep:#0FAF8B;
  --teal-soft:#D6F5EC;
  --amber:#F2A03D;
  --paper:#F6F4EE;
  --paper-2:#ECEEE8;
  --white:#FFFFFF;
  --text:#16211F;
  --muted:#5A6763;
  --weak:#8D9694;
  --line:rgba(18,48,46,.12);
  --line-2:rgba(18,48,46,.22);
  --r-sm:8px;
  --r-md:12px;
  --r-card:16px;
  --r-lg:24px;
  --r-pill:999px;
  --sh-1:0 2px 8px rgba(18,48,46,.06);
  --sh-2:0 12px 28px rgba(18,48,46,.12);
  --ease:cubic-bezier(.2,.7,.3,1);
  --t:200ms cubic-bezier(.2,.7,.3,1);
  --font:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"Inter","SF Mono",ui-monospace,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:17px;
  line-height:1.9;
  color:var(--text);
  background:var(--paper);
  overflow-x:hidden;
}
body.no-scroll{overflow:hidden}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--ink)}
h1{font-size:clamp(28px,4.2vw,52px);line-height:1.25;letter-spacing:-.01em}
h2{font-size:clamp(22px,2.6vw,34px);line-height:1.35}
h3{font-size:20px;line-height:1.5}
p{margin:0}
a{color:var(--ink);text-decoration:none;transition:var(--t)}
a:hover{color:var(--teal-deep)}
img{max-width:100%;display:block;height:auto}
ul,ol{margin:0;padding:0;list-style:none}
button,input{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--teal);outline-offset:2px;border-radius:4px}

/* ---------- 容器 ---------- */
.shell{width:100%;max-width:1320px;margin:0 auto;padding-left:24px;padding-right:24px}
@media (max-width:1399.98px){.shell{max-width:1140px}}
@media (max-width:1199.98px){.shell{max-width:960px}}
@media (max-width:991.98px){.shell{max-width:100%;padding-left:20px;padding-right:20px}}
@media (max-width:575.98px){.shell{padding-left:16px;padding-right:16px}}

.section{padding-top:96px;padding-bottom:96px}
.section-tight{padding-top:64px;padding-bottom:64px}
@media (max-width:991.98px){.section{padding-top:72px;padding-bottom:72px}.section-tight{padding-top:48px;padding-bottom:48px}}
@media (max-width:575.98px){.section{padding-top:56px;padding-bottom:56px}}

.bg-paper{background:var(--paper)}
.bg-white{background:var(--white)}
.bg-grey{background:var(--paper-2)}
.bg-dark{background:var(--ink-deep);color:var(--paper)}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(246,244,238,.94);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid transparent;
  transition:var(--t);
}
.site-header.is-scrolled{
  border-bottom-color:var(--line);
  background:rgba(246,244,238,.98);
  box-shadow:0 1px 0 rgba(18,48,46,.04);
}
.nav-grid{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:18px;
  height:76px;
  transition:height var(--t);
}
.site-header.is-scrolled .nav-grid{height:60px}
.nav-left{display:flex;align-items:center;gap:8px;justify-content:flex-start}
.nav-right{display:flex;align-items:center;gap:8px;justify-content:flex-end}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:8px 12px;
  font-size:15px;
  font-weight:500;
  color:var(--muted);
  border-radius:var(--r-sm);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:2px;
  height:2px;
  background:var(--teal);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--t);
}
.nav-link:hover{color:var(--teal-deep)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--ink);font-weight:500}
.nav-link.active::after{transform:scaleX(1)}
.nav-link.active::before{
  content:"";
  width:4px;height:4px;
  background:var(--ink);
  border-radius:1px;
  display:inline-block;
}
.brand{display:flex;align-items:center;gap:10px;justify-self:center}
.brand-mark{
  width:42px;height:42px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--ink) 0%,var(--ink-2) 100%);
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
  flex:0 0 auto;
}
.brand-mark svg{width:24px;height:24px}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-key{font-size:16px;font-weight:700;color:var(--ink);letter-spacing:.01em}
.brand-sub{font-size:11px;font-weight:500;color:var(--weak);letter-spacing:.16em}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 20px;
  font-size:15px;font-weight:700;
  color:var(--ink-deep);
  background:var(--teal);
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
  transition:var(--t);
}
.nav-cta:hover{background:var(--teal-deep);color:var(--ink-deep);transform:translateY(-1px)}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  background:transparent;
  border:1px solid var(--line-2);
  border-radius:var(--r-sm);
  color:var(--ink);
  cursor:pointer;
  transition:var(--t);
}
.nav-toggle:hover{border-color:var(--teal);color:var(--teal-deep)}
.nav-toggle span{display:block;width:18px;height:2px;background:currentColor;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-cta-icon{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  background:var(--teal);
  color:var(--ink-deep);
  border-radius:var(--r-sm);
}
.mobile-panel{
  display:none;
  background:var(--ink-deep);
  padding:12px 0 24px;
}
.mobile-panel .m-list{display:flex;flex-direction:column}
.mobile-panel .m-list a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:48px;
  padding:0 4px;
  color:var(--paper);
  font-size:16px;
  border-bottom:1px solid rgba(246,244,238,.1);
}
.mobile-panel .m-list a:hover{color:var(--teal)}
.mobile-panel .m-list a.active{color:var(--teal)}
.mobile-panel .m-list a::after{content:"→";font-family:var(--mono);opacity:.6}
@media (max-width:991.98px){
  .nav-grid{grid-template-columns:44px 1fr 44px;height:64px}
  .nav-left,.nav-right{display:none}
  .nav-toggle{display:inline-flex;justify-self:start}
  .nav-cta-icon{display:inline-flex;justify-self:end}
  .brand-mark{width:34px;height:34px;clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px)}
  .brand-mark svg{width:20px;height:20px}
  .brand-key{font-size:14px}
  .brand-sub{font-size:10px;letter-spacing:.1em}
  .site-header.nav-open .mobile-panel{display:block}
  .site-header.nav-open{border-bottom-color:var(--line)}
}

/* ---------- 按钮 ---------- */
.btn-main{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 28px;
  font-size:16px;font-weight:700;
  color:var(--ink-deep);
  background:var(--teal);
  border:none;
  clip-path:polygon(12px 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%,0 12px);
  transition:var(--t);
  cursor:pointer;
}
.btn-main:hover{background:var(--teal-deep);color:var(--ink-deep);transform:translateY(-2px)}
.btn-main:active{transform:translateY(0)}
.btn-ghost{
  display:inline-flex;align-items:center;gap:10px;
  padding:13px 26px;
  font-size:16px;font-weight:500;
  color:var(--paper);
  background:transparent;
  border:1.5px solid rgba(246,244,238,.55);
  border-radius:var(--r-sm);
  transition:var(--t);
  cursor:pointer;
}
.btn-ghost:hover{background:rgba(214,245,236,.12);border-color:var(--teal);color:var(--teal)}
.btn-line{
  display:inline-flex;align-items:center;gap:10px;
  padding:13px 26px;
  font-size:16px;font-weight:500;
  color:var(--ink);
  background:transparent;
  border:1.5px solid var(--ink);
  border-radius:var(--r-sm);
  transition:var(--t);
}
.btn-line:hover{background:var(--teal-soft);border-color:var(--teal);color:var(--ink)}
.btn-line-lg{padding:16px 34px;font-size:17px}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:15px;font-weight:500;
  color:var(--ink);
  border-bottom:1px solid transparent;
}
.link-arrow::after{content:"→";font-family:var(--mono);transition:var(--t)}
.link-arrow:hover{color:var(--teal-deep);border-bottom-color:var(--teal)}
.link-arrow:hover::after{transform:translateX(3px)}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;
  background:linear-gradient(140deg,var(--ink-deep) 0%,var(--ink) 62%,var(--ink-2) 100%);
  color:var(--paper);
  overflow:hidden;
  min-height:600px;
  display:flex;
  align-items:center;
  padding:72px 0 64px;
}
.hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(246,244,238,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(246,244,238,.05) 1px,transparent 1px);
  background-size:24px 24px;
  pointer-events:none;
}
.hero::after{
  content:"";
  position:absolute;
  width:420px;height:420px;
  right:-140px;top:-120px;
  background:radial-gradient(circle,rgba(20,200,160,.22),transparent 68%);
  pointer-events:none;
}
.hero .shell{position:relative;z-index:2}
.hero-inner{
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  gap:56px;
  align-items:center;
}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;
  font-size:13px;font-weight:500;
  letter-spacing:.04em;
  color:var(--teal);
  background:rgba(20,200,160,.12);
  border:1px solid rgba(20,200,160,.34);
  border-radius:var(--r-pill);
  margin-bottom:22px;
}
.hero-tag::before{content:"";width:6px;height:6px;background:var(--teal);border-radius:1px}
.hero h1{color:var(--paper);max-width:15em}
.hero-sub{
  margin-top:20px;
  font-size:17px;
  line-height:1.9;
  color:rgba(246,244,238,.78);
  max-width:32em;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-metrics{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:20px;
  margin-top:48px;
  padding-top:28px;
  border-top:1px solid rgba(246,244,238,.14);
}
.hero-metrics li{display:flex;flex-direction:column;gap:2px}
.m-num{
  font-family:var(--mono);
  font-size:clamp(26px,3vw,38px);
  font-weight:700;
  color:var(--amber);
  line-height:1.2;
}
.m-lab{font-size:13px;letter-spacing:.04em;color:rgba(246,244,238,.62)}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;
  aspect-ratio:4/5;
  object-fit:cover;
  border-radius:var(--r-lg);
  border:1px solid rgba(246,244,238,.16);
}
.hero-visual::after{
  content:"";
  position:absolute;inset:0;
  border-radius:var(--r-lg);
  background:linear-gradient(160deg,rgba(18,48,46,.62),rgba(11,33,31,.86));
  pointer-events:none;
}
.hero-badge{
  position:absolute;
  left:20px;bottom:20px;
  z-index:3;
  padding:10px 16px;
  background:rgba(11,33,31,.86);
  border:1px solid rgba(242,160,61,.55);
  color:var(--amber);
  font-size:13px;
  letter-spacing:.08em;
}
@media (max-width:991.98px){
  .hero{padding:40px 0 56px;min-height:0}
  .hero-inner{grid-template-columns:1fr;gap:36px}
  .hero-visual{order:-1}
  .hero-visual img{aspect-ratio:4/3;max-height:280px}
  .hero-visual::after{border-radius:var(--r-card)}
  .hero-visual img{border-radius:var(--r-card)}
  .hero-metrics{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 16px}
  .hero-badge{left:12px;bottom:12px}
}
@media (max-width:575.98px){
  .hero-cta .btn-main,.hero-cta .btn-ghost{width:100%;justify-content:center}
  .hero h1{font-size:clamp(24px,7vw,32px)}
}

/* ---------- 品牌主张带 ---------- */
.claim-strip{background:var(--paper);border-bottom:1px solid var(--line)}
.claim-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:32px;flex-wrap:wrap;
  padding-top:38px;padding-bottom:38px;
}
.claim-text{
  font-size:clamp(17px,1.8vw,21px);
  font-weight:500;
  color:var(--ink);
  max-width:26em;
}
.claim-tags{display:flex;flex-wrap:wrap;gap:10px}
.claim-tags span{
  padding:7px 15px;
  font-size:13px;
  color:var(--ink-3);
  background:var(--teal-soft);
  border-radius:var(--r-pill);
  letter-spacing:.02em;
}

/* ---------- 板块标题 ---------- */
.sec-head{margin-bottom:52px}
.sec-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
.sec-eyebrow{
  display:block;
  font-family:var(--mono);
  font-size:13px;
  font-weight:500;
  letter-spacing:.16em;
  color:var(--amber);
  margin-bottom:14px;
}
.sec-head h2{max-width:24em}
.sec-desc{
  margin-top:16px;
  max-width:46em;
  color:var(--muted);
  font-size:16px;
}
@media (max-width:767.98px){.sec-head{margin-bottom:36px}}

/* ---------- 故事 / 理念 ---------- */
.story-grid{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:64px;
  align-items:start;
}
.story-media{position:relative}
.story-media img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  border-radius:var(--r-card);
  border:1px solid var(--line);
}
.story-media::after{
  content:"";
  position:absolute;inset:0;
  border-radius:var(--r-card);
  background:linear-gradient(150deg,rgba(18,48,46,.35),rgba(11,33,31,.7));
  pointer-events:none;
}
.story-list{display:flex;flex-direction:column;gap:34px;margin-top:34px}
.story-item{
  display:grid;
  grid-template-columns:64px 1fr;
  gap:22px;
  padding-top:26px;
  border-top:1px solid var(--line);
}
.story-num{
  font-family:var(--mono);
  font-size:32px;
  font-weight:700;
  color:var(--amber);
  line-height:1;
  padding-top:2px;
  border-left:2px solid var(--line-2);
  padding-left:14px;
}
.story-item h3{margin-bottom:10px}
.story-item p{color:var(--muted);font-size:16px}
@media (max-width:991.98px){
  .story-grid{grid-template-columns:1fr;gap:36px}
  .story-list{gap:26px;margin-top:26px}
}
@media (max-width:575.98px){
  .story-item{grid-template-columns:48px 1fr;gap:16px}
  .story-num{font-size:24px;padding-left:10px}
}

/* ---------- 精选内容卡 ---------- */
.feature-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:28px;
}
.card{
  display:flex;
  flex-direction:column;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  transition:var(--t);
  height:100%;
}
.card:hover{
  transform:translateY(-3px);
  box-shadow:var(--sh-2);
  border-color:rgba(20,200,160,.4);
}
.card-media{position:relative;overflow:hidden}
.card-media img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  transition:transform 320ms var(--ease);
}
.card:hover .card-media img{transform:scale(1.04)}
.card-badge{
  position:absolute;
  top:14px;left:14px;
  padding:5px 13px;
  font-size:12px;
  font-weight:500;
  color:var(--ink);
  background:var(--teal-soft);
  clip-path:polygon(10px 0,100% 0,100% 100%,10px 100%,0 calc(100% - 10px),0 0);
}
.card-body{padding:24px 26px 26px;display:flex;flex-direction:column;flex:1}
.card-body h3{margin-bottom:10px;font-size:19px}
.card-body p{color:var(--muted);font-size:15px;line-height:1.8}
.card-foot{margin-top:auto;padding-top:18px}
.card-lg{grid-row:span 2}
.card-lg .card-media img{aspect-ratio:16/12}
.card-lg .card-body h3{font-size:24px}
.card-lg .card-body p{font-size:16px}
@media (max-width:991.98px){
  .feature-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
  .card-lg{grid-column:span 2;grid-row:auto}
  .card-lg .card-media img{aspect-ratio:16/9}
}
@media (max-width:575.98px){
  .feature-grid{grid-template-columns:1fr}
  .card-lg{grid-column:span 1}
  .card-body{padding:20px}
}

/* ---------- CMS 最新信息 ---------- */
.cms-lead{
  display:grid;
  grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);
  gap:0;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  transition:var(--t);
}
.cms-lead:hover{border-color:rgba(20,200,160,.4);box-shadow:var(--sh-2)}
.cms-lead-media{position:relative;overflow:hidden}
.cms-lead-media img{width:100%;height:100%;min-height:260px;object-fit:cover}
.cms-lead-body{padding:34px 36px;display:flex;flex-direction:column;justify-content:center}
.cms-lead-body h3{font-size:24px;margin:14px 0 12px}
.cms-lead-body p{color:var(--muted);font-size:16px}
.cms-meta{
  display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  font-size:13px;letter-spacing:.04em;color:var(--weak);
}
.cms-meta .date{font-family:var(--mono);color:var(--amber)}
.cms-list{margin-top:24px;border-top:1px solid var(--line)}
.cms-row{
  display:grid;
  grid-template-columns:120px minmax(0,1fr) auto;
  gap:24px;
  align-items:center;
  padding:20px 4px;
  border-bottom:1px solid var(--line);
  transition:var(--t);
}
.cms-row:hover{background:rgba(214,245,236,.35);padding-left:12px;padding-right:12px}
.cms-row-thumb{
  width:120px;height:80px;
  border-radius:var(--r-sm);
  overflow:hidden;
  flex:0 0 auto;
}
.cms-row-thumb img{width:100%;height:100%;object-fit:cover}
.cms-row-body h3{font-size:17px;font-weight:500;margin-bottom:6px}
.cms-row-body p{
  font-size:14px;color:var(--muted);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.cms-row-foot{
  display:flex;align-items:center;gap:16px;
  font-size:13px;color:var(--weak);white-space:nowrap;
}
.cms-empty{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:14px;
  min-height:240px;
  border:1px dashed var(--line-2);
  border-radius:var(--r-card);
  background:rgba(255,255,255,.6);
  color:var(--muted);
  text-align:center;
  padding:32px;
}
.cms-empty svg{width:36px;height:36px;stroke:var(--weak)}
.cms-empty span{font-size:15px}
@media (max-width:991.98px){
  .cms-lead{grid-template-columns:1fr}
  .cms-lead-media img{min-height:0;aspect-ratio:16/9}
  .cms-lead-body{padding:26px}
  .cms-row{grid-template-columns:96px minmax(0,1fr);gap:16px}
  .cms-row-thumb{width:96px;height:68px}
  .cms-row-foot{grid-column:2;justify-content:flex-start}
}
@media (max-width:575.98px){
  .cms-row{grid-template-columns:1fr;gap:12px}
  .cms-row-thumb{width:100%;height:auto;aspect-ratio:16/10}
  .cms-row-foot{grid-column:1}
  .cms-row:hover{padding-left:4px;padding-right:4px}
  .cms-lead-body h3{font-size:20px}
}

/* ---------- 信任背书 ---------- */
.stat-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:24px;
}
.stat-card{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:26px 24px;
}
.stat-num{
  font-family:var(--mono);
  font-size:clamp(30px,3.6vw,44px);
  font-weight:700;
  color:var(--amber);
  line-height:1.15;
}
.stat-lab{display:block;margin-top:6px;font-size:15px;color:var(--ink)}
.stat-note{display:block;margin-top:8px;font-size:13px;color:var(--weak)}
.badge-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:36px}
.badge-row span{
  padding:8px 16px;
  font-size:13px;
  color:var(--muted);
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
}
.quote-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
  margin-top:36px;
}
.quote-card{
  display:flex;
  gap:18px;
  padding:26px;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-card);
}
.avatar{
  width:52px;height:52px;
  flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);
  font-size:18px;font-weight:700;
  color:var(--ink);
  background:var(--teal-soft);
  border-radius:var(--r-sm);
}
.quote-card p{font-size:15px;color:var(--muted);line-height:1.8}
.quote-name{display:block;margin-top:10px;font-size:13px;color:var(--weak);letter-spacing:.04em}
@media (max-width:991.98px){
  .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .quote-grid{grid-template-columns:1fr}
}
@media (max-width:575.98px){
  .stat-grid{grid-template-columns:1fr}
}

/* ---------- FAQ ---------- */
.faq-accordion .accordion-item{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  margin-bottom:14px;
  overflow:hidden;
}
.faq-accordion .accordion-header{margin:0}
.faq-accordion .accordion-button{
  padding:20px 24px;
  font-size:17px;
  font-weight:500;
  color:var(--ink);
  background:var(--white);
  box-shadow:none;
  border:none;
}
.faq-accordion .accordion-button:not(.collapsed){
  color:var(--ink);
  background:var(--teal-soft);
}
.faq-accordion .accordion-button:focus{box-shadow:none;outline:2px solid var(--teal);outline-offset:-2px}
.faq-accordion .accordion-button::after{
  width:18px;height:18px;
  background-size:18px;
  filter:none;
  opacity:.7;
}
.faq-accordion .accordion-body{
  padding:20px 24px 24px;
  font-size:15px;
  line-height:1.9;
  color:var(--muted);
  background:var(--teal-soft);
}

/* ---------- 订阅 CTA ---------- */
.cta-band{
  position:relative;
  background:linear-gradient(120deg,var(--ink) 0%,var(--ink-deep) 100%);
  color:var(--paper);
  border-radius:var(--r-lg);
  padding:56px 56px;
  overflow:hidden;
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,.85fr);
  gap:48px;
  align-items:center;
}
.cta-band::before{
  content:"";
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(246,244,238,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(246,244,238,.05) 1px,transparent 1px);
  background-size:24px 24px;
  pointer-events:none;
}
.cta-band > *{position:relative;z-index:2}
.cta-band h2{color:var(--paper)}
.cta-band p{margin-top:14px;color:rgba(246,244,238,.74);font-size:16px;max-width:30em}
.sub-form{display:flex;gap:12px;flex-wrap:wrap}
.sub-form input{
  flex:1 1 220px;
  height:48px;
  padding:0 16px;
  font-size:15px;
  color:var(--text);
  background:var(--paper);
  border:1px solid transparent;
  border-radius:10px;
  transition:var(--t);
}
.sub-form input::placeholder{color:var(--weak)}
.sub-form input:focus{outline:none;border-color:var(--teal);box-shadow:0 0 0 2px rgba(20,200,160,.45)}
.sub-form .btn-main{padding:0 26px;height:48px;font-size:15px;clip-path:none;border-radius:10px}
.form-tip{
  display:block;
  margin-top:14px;
  font-size:13px;
  letter-spacing:.02em;
  color:rgba(246,244,238,.6);
}
.form-tip.is-success{color:var(--teal)}
@media (max-width:991.98px){
  .cta-band{grid-template-columns:1fr;padding:36px 26px;gap:26px;border-radius:var(--r-card)}
  .sub-form .btn-main{width:100%}
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  background:var(--ink-deep);
  color:var(--paper);
  padding-top:72px;
  border-top:1px solid var(--amber);
}
.site-footer::before{
  content:"";
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(246,244,238,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(246,244,238,.04) 1px,transparent 1px);
  background-size:24px 24px;
  pointer-events:none;
}
.site-footer .shell{position:relative;z-index:2}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.3fr;
  gap:48px;
  padding-bottom:52px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:18px}
.footer-brand .brand-mark{width:38px;height:38px}
.footer-brand .brand-key{color:var(--paper);font-size:15px}
.footer-brand .brand-sub{color:rgba(246,244,238,.55)}
.footer-about{font-size:14px;line-height:1.9;color:rgba(246,244,238,.68);max-width:30em}
.footer-title{font-size:15px;font-weight:500;color:var(--paper);margin-bottom:18px;letter-spacing:.04em}
.footer-links{display:flex;flex-direction:column;gap:12px}
.footer-links a{
  font-size:14px;
  color:rgba(246,244,238,.68);
  display:inline-flex;align-items:center;gap:6px;
}
.footer-links a::after{content:"→";opacity:0;transform:translateX(-4px);transition:var(--t);font-family:var(--mono)}
.footer-links a:hover{color:var(--teal)}
.footer-links a:hover::after{opacity:1;transform:translateX(2px)}
.footer-contact{font-size:14px;color:rgba(246,244,238,.68);line-height:1.9;margin-bottom:16px}
.footer-sub{display:flex;gap:10px;flex-wrap:wrap}
.footer-sub input{
  flex:1 1 150px;height:44px;padding:0 14px;
  font-size:14px;color:var(--paper);
  background:rgba(246,244,238,.08);
  border:1px solid rgba(246,244,238,.2);
  border-radius:10px;
  transition:var(--t);
}
.footer-sub input::placeholder{color:rgba(246,244,238,.45)}
.footer-sub input:focus{outline:none;border-color:var(--teal);box-shadow:0 0 0 2px rgba(20,200,160,.3)}
.footer-sub button{
  height:44px;padding:0 20px;
  font-size:14px;font-weight:700;
  color:var(--ink-deep);
  background:var(--teal);
  border:none;border-radius:10px;
  cursor:pointer;
  transition:var(--t);
}
.footer-sub button:hover{background:var(--teal-deep)}
.footer-note{margin-top:12px;font-size:12px;color:rgba(246,244,238,.45)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;
  gap:20px;flex-wrap:wrap;
  padding:22px 0 28px;
  border-top:1px solid rgba(246,244,238,.12);
  font-size:13px;
  color:rgba(246,244,238,.55);
}
.footer-bottom a{color:rgba(246,244,238,.55)}
.footer-bottom a:hover{color:var(--teal)}
@media (max-width:991.98px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:36px}
}
@media (max-width:575.98px){
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-sub button{width:100%}
  .site-footer{padding-top:52px}
}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;
  right:22px;bottom:22px;
  width:44px;height:44px;
  display:flex;align-items:center;justify-content:center;
  background:var(--ink);
  color:var(--paper);
  border:none;border-radius:var(--r-sm);
  font-size:18px;
  cursor:pointer;
  opacity:0;visibility:hidden;
  transform:translateY(8px);
  transition:var(--t);
  z-index:1040;
}
.to-top.is-on{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--ink-2);color:var(--teal)}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important;scroll-behavior:auto !important}
}

/* roulang page: article */
:root{
  --ink:#12302E;
  --ink-deep:#0B211F;
  --ink-2:#1E4A45;
  --ink-3:#2F6A63;
  --accent:#14C8A0;
  --accent-soft:#D6F5EC;
  --amber:#F2A03D;
  --paper:#F6F4EE;
  --paper-alt:#ECEEE8;
  --white:#FFFFFF;
  --text:#16211F;
  --text-2:#5A6763;
  --text-3:#8D9694;
  --border:rgba(18,48,46,.12);
  --border-strong:rgba(18,48,46,.2);
  --r-s:8px;
  --r-m:12px;
  --r-card:16px;
  --r-lg:24px;
  --sh-s:0 2px 8px rgba(18,48,46,.06);
  --sh-h:0 12px 28px rgba(18,48,46,.12);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --mono:"Inter","SFMono-Regular",Consolas,ui-monospace,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  font-size:17px;
  line-height:1.9;
  color:var(--text);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--accent)}
button,input{font-family:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;color:var(--ink)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

.shell{width:100%;max-width:1320px;margin:0 auto;padding:0 24px}
@media(max-width:1399px){.shell{max-width:1140px}}
@media(max-width:1199px){.shell{max-width:960px}}
@media(max-width:991px){.shell{padding:0 20px}}
@media(max-width:575px){.shell{padding:0 16px}}

/* ============ 按钮 ============ */
.btn-brand,.btn-ghost,.btn-line{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:500;line-height:1;border-radius:var(--r-m);
  padding:14px 22px;border:1.5px solid transparent;cursor:pointer;
  transition:all .2s var(--ease);min-height:44px;
}
.btn-brand{background:var(--accent);color:var(--ink-deep);clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px)}
.btn-brand:hover{background:#0FB48F;color:var(--ink-deep);transform:translateY(-2px);box-shadow:0 10px 22px rgba(20,200,160,.28)}
.btn-line{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn-line:hover{background:var(--accent-soft);border-color:var(--accent);color:var(--ink)}
.btn-ghost{background:transparent;color:var(--paper);border-color:rgba(246,244,238,.4)}
.btn-ghost:hover{background:rgba(246,244,238,.1);color:#fff;border-color:var(--accent)}
.btn-sm{padding:11px 18px;font-size:14px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:500;color:var(--ink);position:relative}
.link-arrow::after{content:"→";transition:transform .2s var(--ease);color:var(--accent)}
.link-arrow:hover{color:var(--accent)}
.link-arrow:hover::after{transform:translateX(3px)}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(246,244,238,.94);
  backdrop-filter:saturate(160%) blur(6px);
  border-bottom:1px solid transparent;
  transition:background .25s var(--ease),border-color .25s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--border)}
.nav-shell{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:24px;height:76px;transition:height .25s var(--ease)}
.site-header.is-scrolled .nav-shell{height:60px}
.nav-left{display:flex;align-items:center;gap:26px}
.nav-right{display:flex;align-items:center;justify-content:flex-end;gap:22px}
.nav-link{font-size:15px;font-weight:500;color:var(--text-2);position:relative;padding:6px 0;display:inline-block}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease)}
.nav-link:hover{color:var(--accent)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--ink)}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active::before{content:"";position:absolute;left:-12px;top:50%;width:4px;height:4px;background:var(--accent);transform:translateY(-50%)}

.brand{display:flex;align-items:center;gap:12px;justify-self:center}
.brand-mark{
  width:44px;height:44px;flex:0 0 44px;display:grid;place-items:center;
  background:var(--ink-deep);border-radius:12px;
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
}
.brand-mark svg{width:24px;height:24px}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-key{font-size:16px;font-weight:700;color:var(--ink);letter-spacing:-.01em}
.brand-sub{font-size:12px;color:var(--text-3);letter-spacing:.04em}

.menu-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--border);background:var(--white);
  border-radius:var(--r-m);align-items:center;justify-content:center;cursor:pointer;padding:0;
}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--ink);position:relative}
.menu-toggle span::before,.menu-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);transition:transform .2s var(--ease)}
.menu-toggle span::before{top:-6px}
.menu-toggle span::after{top:6px}

.mobile-panel{
  display:none;background:var(--ink-deep);
  border-top:1px solid rgba(246,244,238,.12);
  padding:8px 0 20px;
}
.mobile-panel.is-open{display:block}
.mobile-panel a{
  display:flex;align-items:center;min-height:48px;padding:0 24px;
  color:var(--paper);font-size:15px;font-weight:500;border-bottom:1px solid rgba(246,244,238,.08);
}
.mobile-panel a:hover{color:var(--accent)}
.mobile-panel .mobile-cta{margin:16px 24px 0;border-bottom:none;justify-content:center;padding:0 22px;min-height:48px}

@media(max-width:991px){
  .nav-left,.nav-right{display:none}
  .nav-shell{grid-template-columns:1fr;position:relative;justify-items:center}
  .menu-toggle{display:inline-flex;position:absolute;left:20px;top:50%;transform:translateY(-50%)}
  .brand{justify-self:center}
  .brand-mark{width:32px;height:32px;flex:0 0 32px;border-radius:9px}
  .brand-key{font-size:14px}
  .brand-sub{display:none}
}

/* ============ 面包屑 ============ */
.crumb-bar{background:var(--white);border-bottom:1px solid var(--border)}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);padding:16px 0;letter-spacing:.02em}
.crumb a{color:var(--text-2)}
.crumb a:hover{color:var(--accent)}
.crumb .sep{color:var(--border-strong)}
.crumb .current{color:var(--text-3)}

/* ============ 文章头 ============ */
.article-hero{background:var(--white);padding:40px 0 48px;border-bottom:1px solid var(--border)}
.article-head{max-width:900px}
.badge-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:18px}
.pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:999px;font-size:13px;font-weight:500;
  background:var(--accent-soft);color:var(--ink);
}
.pill-amber{background:rgba(242,160,61,.14);color:#A86516}
.article-hero h1{font-size:clamp(28px,4.2vw,44px);line-height:1.25;letter-spacing:-.01em;color:var(--ink)}
.article-kicker{margin-top:14px;font-size:15px;color:var(--text-2);line-height:1.8}
.article-lead{
  margin-top:20px;padding-left:18px;border-left:3px solid var(--accent);
  font-size:16px;color:var(--text-2);line-height:1.85;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 24px;
  margin-top:26px;padding-top:20px;border-top:1px solid var(--border);
  font-size:13px;color:var(--text-3);letter-spacing:.04em;
}
.article-meta .meta-time{color:var(--amber);font-family:var(--mono)}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:6px}

/* ============ 正文区 ============ */
.article-main{padding:56px 0 72px;background:var(--paper)}
.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:56px;align-items:start}
@media(max-width:1199px){.article-grid{grid-template-columns:minmax(0,1fr);gap:32px}}
.article-body{max-width:820px;font-size:17px;line-height:1.9;color:var(--text)}
.article-body p{margin:0 0 1.2em}
.article-body h2{
  font-size:clamp(22px,2.4vw,28px);line-height:1.4;color:var(--ink);
  margin:2.2em 0 .8em;padding-left:16px;position:relative;
}
.article-body h2::before{content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:4px;background:var(--accent);border-radius:2px}
.article-body h3{font-size:19px;font-weight:700;color:var(--ink);margin:1.8em 0 .6em}
.article-body h4{font-size:17px;font-weight:700;color:var(--ink);margin:1.6em 0 .5em}
.article-body ul,.article-body ol{padding-left:1.5em;margin:0 0 1.2em}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin:.45em 0}
.article-body li::marker{color:var(--accent)}
.article-body blockquote{
  margin:1.6em 0;padding:20px 24px;background:var(--accent-soft);
  border-left:3px solid var(--accent);border-radius:0 var(--r-m) var(--r-m) 0;
  color:var(--ink-2);font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-m);margin:1.6em 0}
.article-body figure{margin:1.8em 0}
.article-body figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:10px}
.article-body a{color:var(--ink);text-decoration:underline;text-decoration-color:var(--accent);text-underline-offset:3px}
.article-body a:hover{color:var(--accent)}
.article-body table{
  width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px;
  display:block;overflow-x:auto;white-space:nowrap;
}
.article-body th,.article-body td{border:1px solid var(--border);padding:11px 14px;text-align:left}
.article-body th{background:var(--paper-alt);color:var(--ink);font-weight:500}
.article-body code{background:var(--paper-alt);padding:2px 6px;border-radius:6px;font-family:var(--mono);font-size:14px}
.article-body hr{border:none;border-top:1px solid var(--border);margin:2em 0}

.empty-state{
  border:1px dashed var(--border-strong);border-radius:var(--r-card);
  background:var(--white);padding:56px 28px;text-align:center;min-height:260px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
}
.empty-icon{
  width:52px;height:52px;border-radius:14px;background:var(--accent-soft);
  display:grid;place-items:center;color:var(--ink);
}
.empty-state h2{font-size:20px}
.empty-state p{font-size:15px;color:var(--text-2);max-width:420px}

/* ============ 侧栏 ============ */
.article-side{display:flex;flex-direction:column;gap:20px}
@media(max-width:1199px){.article-side{order:-1}}
.side-card{
  background:var(--white);border:1px solid var(--border);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-s);
}
@media(min-width:1200px){.toc-card{position:sticky;top:96px}}
.side-title{font-size:15px;font-weight:500;color:var(--ink);margin-bottom:14px;letter-spacing:.02em}
.toc-nav{display:flex;flex-direction:column;gap:2px;max-height:420px;overflow:auto}
.toc-nav a{
  display:block;font-size:14px;color:var(--text-2);padding:7px 10px;
  border-left:2px solid transparent;border-radius:0 6px 6px 0;line-height:1.6;
}
.toc-nav a:hover{background:var(--paper);color:var(--ink)}
.toc-nav a.is-current{color:var(--ink);border-left-color:var(--accent);background:var(--accent-soft);font-weight:500}
.toc-nav a.is-sub{padding-left:22px;font-size:13.5px}
.toc-empty{font-size:13px;color:var(--text-3);line-height:1.8}
.side-list{display:flex;flex-direction:column;gap:10px}
.side-list a{
  display:flex;align-items:center;gap:10px;font-size:14px;color:var(--text-2);
  padding:12px 14px;border:1px solid var(--border);border-radius:var(--r-m);
  transition:all .2s var(--ease);
}
.side-list a::after{content:"→";margin-left:auto;color:var(--accent);opacity:0;transition:opacity .2s var(--ease)}
.side-list a:hover{background:var(--paper);border-color:rgba(20,200,160,.4);color:var(--ink);transform:translateX(2px)}
.side-list a:hover::after{opacity:1}

/* ============ 标签与文末 ============ */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin:36px 0 0;padding-top:28px;border-top:1px solid var(--border)}
.tag{font-size:13px;padding:7px 14px;border-radius:999px;background:var(--white);border:1px solid var(--border);color:var(--text-2)}
.tag:hover{border-color:var(--accent);color:var(--ink)}

.article-tail{padding:0 0 88px;background:var(--paper)}
.tail-block{margin-bottom:56px}
.tail-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px}
.tail-head h2{font-size:clamp(20px,2.2vw,26px)}
.tail-head p{font-size:14px;color:var(--text-3)}
.dual-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
@media(max-width:767px){.dual-cards{grid-template-columns:1fr}}
.dual-card{
  background:var(--white);border:1px solid var(--border);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--sh-s);transition:all .2s var(--ease);
}
.dual-card:hover{transform:translateY(-3px);box-shadow:var(--sh-h);border-color:rgba(20,200,160,.4)}
.dual-card .dual-label{font-size:13px;color:var(--amber);letter-spacing:.06em;font-family:var(--mono)}
.dual-card h3{font-size:18px;margin:10px 0 8px}
.dual-card p{font-size:14px;color:var(--text-2);line-height:1.8;margin-bottom:14px}

.rec-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
@media(max-width:991px){.rec-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:575px){.rec-grid{grid-template-columns:1fr}}
.rec-card{
  background:var(--white);border:1px solid var(--border);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-s);transition:all .2s var(--ease);display:flex;flex-direction:column;
}
.rec-card:hover{transform:translateY(-3px);box-shadow:var(--sh-h);border-color:rgba(20,200,160,.4)}
.rec-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--paper-alt)}
.rec-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease)}
.rec-card:hover .rec-thumb img{transform:scale(1.04)}
.rec-body{padding:22px;display:flex;flex-direction:column;flex:1}
.rec-body h3{font-size:17px;line-height:1.5;margin-bottom:8px}
.rec-body p{font-size:14px;color:var(--text-2);line-height:1.8;margin-bottom:16px}
.rec-body .link-arrow{margin-top:auto}

.return-bar{display:flex;justify-content:center;margin-top:8px}

.cta-band{background:var(--ink-deep);border-radius:var(--r-lg);padding:48px;position:relative;overflow:hidden}
.cta-band::before{
  content:"";position:absolute;inset:0;opacity:.05;
  background-image:linear-gradient(rgba(246,244,238,.7) 1px,transparent 1px),linear-gradient(90deg,rgba(246,244,238,.7) 1px,transparent 1px);
  background-size:24px 24px;
}
.cta-band .cta-inner{position:relative;display:grid;grid-template-columns:1.4fr auto;gap:32px;align-items:center}
@media(max-width:991px){.cta-band{padding:32px}.cta-band .cta-inner{grid-template-columns:1fr;gap:20px}}
.cta-band h2{color:var(--paper);font-size:clamp(22px,2.4vw,30px);line-height:1.35}
.cta-band p{color:rgba(246,244,238,.72);font-size:15px;margin-top:10px;max-width:620px}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:24px;bottom:28px;width:44px;height:44px;border-radius:var(--r-m);
  background:var(--ink);color:var(--paper);border:none;display:grid;place-items:center;
  cursor:pointer;opacity:0;visibility:hidden;transform:translateY(8px);
  transition:all .25s var(--ease);z-index:1040;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--ink-deep);transform:translateY(-3px)}
@media(max-width:575px){.to-top{right:16px;bottom:16px}}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-deep);color:var(--paper);border-top:1px solid var(--amber);position:relative;overflow:hidden}
.site-footer::before{
  content:"";position:absolute;inset:0;opacity:.04;pointer-events:none;
  background-image:linear-gradient(rgba(246,244,238,.8) 1px,transparent 1px),linear-gradient(90deg,rgba(246,244,238,.8) 1px,transparent 1px);
  background-size:24px 24px;
}
.footer-grid{position:relative;display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:40px;padding:72px 0 48px}
@media(max-width:1199px){.footer-grid{grid-template-columns:1fr 1fr;gap:36px}}
@media(max-width:575px){.footer-grid{grid-template-columns:1fr;padding:52px 0 36px}}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.footer-brand .brand-mark{background:transparent;border:1px solid rgba(246,244,238,.2);width:40px;height:40px;flex:0 0 40px}
.footer-brand .brand-key{color:var(--paper);font-size:15px}
.footer-brand .brand-sub{color:rgba(246,244,238,.55)}
.footer-about{font-size:14px;line-height:1.9;color:rgba(246,244,238,.68);max-width:340px}
.footer-title{font-size:15px;font-weight:500;color:var(--paper);margin-bottom:18px;letter-spacing:.02em}
.footer-links{display:flex;flex-direction:column;gap:12px}
.footer-links a{font-size:14px;color:rgba(246,244,238,.72);display:inline-flex;align-items:center;gap:6px;transition:all .2s var(--ease)}
.footer-links a::after{content:"→";opacity:0;transform:translateX(-4px);transition:all .2s var(--ease);color:var(--accent)}
.footer-links a:hover{color:var(--accent)}
.footer-links a:hover::after{opacity:1;transform:translateX(0)}
.footer-contact{font-size:14px;line-height:1.9;color:rgba(246,244,238,.68);margin-bottom:18px}
.footer-sub{display:flex;gap:10px}
@media(max-width:575px){.footer-sub{flex-direction:column}}
.footer-sub input{
  flex:1;min-width:0;height:48px;border-radius:10px;padding:0 16px;font-size:14px;
  background:rgba(246,244,238,.06);border:1px solid rgba(246,244,238,.2);color:var(--paper);
  transition:all .2s var(--ease);
}
.footer-sub input::placeholder{color:rgba(246,244,238,.45)}
.footer-sub input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 2px rgba(20,200,160,.25)}
.footer-sub button{
  height:48px;padding:0 20px;border-radius:10px;border:none;cursor:pointer;
  background:var(--accent);color:var(--ink-deep);font-size:14px;font-weight:500;
  transition:all .2s var(--ease);
}
.footer-sub button:hover{background:#0FB48F;transform:translateY(-2px)}
.footer-note{font-size:12px;color:rgba(246,244,238,.5);margin-top:12px;line-height:1.7}
.footer-note.is-ok{color:var(--accent)}
.footer-note.is-err{color:#E7A08F}
.footer-bottom{
  position:relative;border-top:1px solid rgba(246,244,238,.12);padding:22px 0 28px;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:rgba(246,244,238,.6);
}
.footer-bottom a{color:rgba(246,244,238,.75)}
.footer-bottom a:hover{color:var(--accent)}

@media(prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
}

/* roulang page: category1 */
:root{
  --ink:#12302E;
  --ink-deep:#0B211F;
  --ink-2:#1E4A45;
  --ink-3:#2F6A63;
  --acc:#14C8A0;
  --acc-soft:#D6F5EC;
  --amber:#F2A03D;
  --paper:#F6F4EE;
  --paper-2:#ECEEE8;
  --white:#FFFFFF;
  --tx:#16211F;
  --tx-2:#5A6763;
  --tx-3:#8D9694;
  --line:rgba(18,48,46,.12);
  --line-strong:rgba(18,48,46,.2);
  --sh-1:0 2px 8px rgba(18,48,46,.06);
  --sh-2:0 12px 28px rgba(18,48,46,.12);
  --r-s:8px;
  --r-m:12px;
  --r-c:16px;
  --r-l:24px;
  --r-p:999px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --font:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --mono:"Inter",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

*,*::before,*::after{box-sizing:border-box}

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}

body{
  margin:0;
  font-family:var(--font);
  font-size:17px;
  font-weight:400;
  line-height:1.9;
  color:var(--tx);
  background:var(--paper);
  overflow-x:hidden;
}

body.no-scroll{overflow:hidden}

h1,h2,h3,h4,h5,h6{margin:0;font-weight:700;line-height:1.35;letter-spacing:-.01em;color:var(--ink)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
button,input{font-family:inherit;font-size:inherit}
button{cursor:pointer;border:none;background:none}

a:focus-visible,
button:focus-visible,
input:focus-visible,
.accordion-button:focus-visible{
  outline:2px solid var(--acc);
  outline-offset:2px;
  border-radius:4px;
}

.visually-hidden{
  position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

.shell{
  width:100%;
  max-width:1320px;
  margin:0 auto;
  padding:0 24px;
}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:1000;
  background:rgba(246,244,238,.94);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease);
}
.site-header.is-scrolled{
  border-bottom:1px solid var(--line);
  box-shadow:0 2px 12px rgba(18,48,46,.05);
}

.nav-shell{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:20px;
  height:76px;
  transition:height .2s var(--ease);
}
.site-header.is-scrolled .nav-shell{height:60px}

.nav-left,.nav-right{display:flex;align-items:center;gap:26px}
.nav-right{justify-content:flex-end}

.nav-link{
  position:relative;
  font-size:15px;
  font-weight:500;
  color:var(--tx-2);
  padding:6px 2px;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-2px;
  height:2px;
  background:var(--acc);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .2s var(--ease);
}
.nav-link:hover{color:var(--acc)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--ink);font-weight:500}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active::before{
  content:"";
  position:absolute;
  left:-10px;top:50%;
  width:4px;height:4px;
  background:var(--ink);
  transform:translateY(-50%);
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  justify-self:center;
}
.brand-mark{
  width:42px;height:42px;
  border-radius:11px;
  background:var(--ink-deep);
  display:grid;
  place-items:center;
  flex:0 0 auto;
  box-shadow:var(--sh-1);
}
.brand-mark svg{width:24px;height:24px;display:block}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-key{
  font-size:15px;
  font-weight:700;
  letter-spacing:.01em;
  color:var(--ink);
  white-space:nowrap;
}
.brand-sub{
  font-size:11px;
  color:var(--tx-3);
  letter-spacing:.08em;
}

/* 按钮 */
.btn-main,.btn-ghost,.btn-small{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-weight:500;
  border-radius:var(--r-s);
  transition:transform .2s var(--ease),background .2s var(--ease),
             color .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
  white-space:nowrap;
  text-align:center;
}

.btn-main{
  background:var(--acc);
  color:var(--ink-deep);
  padding:13px 26px;
  font-size:16px;
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
  box-shadow:var(--sh-1);
}
.btn-main:hover{background:#0FB78F;color:var(--ink-deep);transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-main:active{transform:translateY(0)}

.btn-ghost{
  background:transparent;
  color:var(--ink);
  border:1.5px solid var(--ink);
  padding:12px 24px;
  font-size:16px;
}
.btn-ghost:hover{background:var(--acc-soft);border-color:var(--acc);color:var(--ink)}
.btn-ghost:active{transform:translateY(1px)}

.btn-small{
  background:var(--acc);
  color:var(--ink-deep);
  padding:9px 18px;
  font-size:14px;
  border-radius:var(--r-s);
}
.btn-small:hover{background:#0FB78F;transform:translateY(-1px);box-shadow:var(--sh-1)}

.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:15px;
  font-weight:500;
  color:var(--ink);
  position:relative;
}
.link-arrow::after{
  content:"";
  position:absolute;
  left:0;right:22px;bottom:-3px;
  height:1px;
  background:var(--ink-3);
  transform:scaleX(.35);
  transform-origin:left center;
  transition:transform .2s var(--ease);
}
.link-arrow .arw{transition:transform .2s var(--ease);display:inline-block;color:var(--acc)}
.link-arrow:hover{color:var(--acc)}
.link-arrow:hover::after{transform:scaleX(1);background:var(--acc)}
.link-arrow:hover .arw{transform:translateX(3px)}

/* 汉堡与移动面板 */
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:var(--r-s);
  place-items:center;
  background:var(--white);
  border:1px solid var(--line);
}
.nav-toggle span{
  display:block;
  width:18px;height:2px;
  background:var(--ink);
  position:relative;
  transition:background .2s var(--ease);
}
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";
  position:absolute;
  left:0;width:18px;height:2px;
  background:var(--ink);
  transition:transform .2s var(--ease);
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-toggle.is-active span{background:transparent}
.nav-toggle.is-active span::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle.is-active span::after{transform:translateY(-6px) rotate(-45deg)}

.mobile-panel{
  display:none;
  background:var(--ink-deep);
  border-top:1px solid rgba(246,244,238,.12);
  max-height:0;
  overflow:hidden;
  transition:max-height .28s var(--ease);
}
.mobile-panel.is-open{max-height:520px}
.mobile-panel .panel-inner{padding:12px 24px 28px}
.mobile-panel a{
  display:flex;
  align-items:center;
  min-height:48px;
  font-size:16px;
  color:var(--paper);
  border-bottom:1px solid rgba(246,244,238,.1);
}
.mobile-panel a:hover,.mobile-panel a.is-active{color:var(--acc)}
.mobile-panel .panel-cta{margin-top:16px;width:100%;border-bottom:none}

/* ============ 页首 Hero ============ */
.page-hero{
  position:relative;
  background:var(--paper);
  padding:52px 0 60px;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.hero-lines{
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(18,48,46,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(18,48,46,.05) 1px,transparent 1px);
  background-size:24px 24px;
  opacity:.7;
  pointer-events:none;
}
.hero-inner{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,1.4fr) minmax(0,.85fr);
  gap:48px;
  align-items:center;
  min-height:300px;
}
.breadcrumb-nav{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--tx-3);
  letter-spacing:.04em;
  margin-bottom:18px;
}
.breadcrumb-nav a{color:var(--tx-2)}
.breadcrumb-nav a:hover{color:var(--acc)}
.breadcrumb-nav .sep{color:var(--tx-3)}
.breadcrumb-nav .current{color:var(--tx-3)}
.page-hero h1{
  font-size:clamp(28px,4.2vw,52px);
  line-height:1.25;
  letter-spacing:-.01em;
  margin-bottom:18px;
}
.hero-lead{
  font-size:17px;
  line-height:1.9;
  color:var(--tx-2);
  max-width:640px;
}
.hero-tags{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:24px;
}
.tag{
  display:inline-flex;
  align-items:center;
  height:32px;
  padding:0 14px;
  border-radius:var(--r-p);
  background:var(--acc-soft);
  color:var(--ink);
  font-size:13px;
  letter-spacing:.04em;
}
.tag-amber{
  background:transparent;
  border:1px solid rgba(242,160,61,.5);
  color:#B4701D;
}
.hero-visual{
  position:relative;
  margin:0;
  border-radius:var(--r-m);
  overflow:hidden;
  box-shadow:var(--sh-2);
}
.hero-visual img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
}
.hero-visual::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(160deg,rgba(18,48,46,.55),rgba(11,33,31,.2));
  pointer-events:none;
}

/* ============ 主体：左目录 + 右条目 ============ */
.section{padding:92px 0}
.section-alt{background:var(--paper-2)}
.section-white{background:var(--white)}

.section-head{max-width:760px;margin-bottom:44px}
.section-head h2{
  font-size:clamp(22px,2.6vw,34px);
  line-height:1.35;
  margin-bottom:14px;
}
.section-head p{color:var(--tx-2);font-size:16px}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  letter-spacing:.14em;
  color:var(--ink-3);
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:26px;height:1px;
  background:var(--amber);
}

.guide-layout{
  display:grid;
  grid-template-columns:236px minmax(0,1fr);
  gap:56px;
  align-items:start;
}

.sticky-toc{
  position:sticky;
  top:96px;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-m);
  padding:22px 20px;
  box-shadow:var(--sh-1);
}
.sticky-toc h3{
  font-size:13px;
  letter-spacing:.14em;
  color:var(--tx-3);
  font-weight:500;
  margin-bottom:14px;
}
.sticky-toc ol{counter-reset:toc;display:flex;flex-direction:column;gap:2px}
.sticky-toc li{counter-increment:toc}
.sticky-toc a{
  display:flex;
  gap:10px;
  align-items:baseline;
  padding:9px 8px;
  border-radius:var(--r-s);
  font-size:14.5px;
  color:var(--tx-2);
  line-height:1.6;
}
.sticky-toc a::before{
  content:counter(toc,decimal-leading-zero);
  font-family:var(--mono);
  font-size:12px;
  color:var(--amber);
  flex:0 0 auto;
}
.sticky-toc a:hover{background:var(--acc-soft);color:var(--ink)}

.entries{display:flex;flex-direction:column;gap:64px}

.entry{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:36px;
  align-items:center;
  padding-bottom:64px;
  border-bottom:1px solid var(--line);
}
.entry:last-child{padding-bottom:0;border-bottom:none}
.entry.is-flip .entry-media{order:2}

.entry-index{
  display:flex;
  align-items:center;
  gap:14px;
  margin-bottom:16px;
}
.entry-index .num{
  font-family:var(--mono);
  font-size:34px;
  font-weight:700;
  line-height:1;
  color:var(--amber);
}
.entry-index .rule{
  flex:1;
  height:1px;
  background:linear-gradient(90deg,rgba(242,160,61,.65),rgba(242,160,61,0));
}
.entry h2{
  font-size:clamp(20px,2vw,26px);
  line-height:1.4;
  margin-bottom:16px;
}
.entry p{color:var(--tx-2);font-size:16.5px;margin-bottom:14px}

.dot-list{display:flex;flex-direction:column;gap:10px;margin:20px 0 22px}
.dot-list li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  font-size:15.5px;
  color:var(--tx);
}
.dot-list li::before{
  content:"";
  flex:0 0 auto;
  width:8px;height:8px;
  margin-top:9px;
  background:var(--acc);
  border-radius:2px;
}

.entry-media{
  position:relative;
  border-radius:var(--r-m);
  overflow:hidden;
  box-shadow:var(--sh-1);
}
.entry-media img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  transition:transform .3s var(--ease);
}
.entry-media:hover img{transform:scale(1.04)}
.entry-media .corner{
  position:absolute;
  top:0;left:0;
  padding:6px 14px 6px 12px;
  background:var(--ink);
  color:var(--paper);
  font-size:12px;
  letter-spacing:.08em;
  clip-path:polygon(0 0,100% 0,calc(100% - 10px) 100%,0 100%);
}

/* ============ 特性矩阵 ============ */
.matrix{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  border-radius:var(--r-c);
  overflow:hidden;
}
.matrix-item{
  background:var(--white);
  padding:28px 26px;
  display:flex;
  gap:16px;
  align-items:flex-start;
  transition:background .2s var(--ease);
}
.matrix-item:hover{background:#FBFBF8}
.matrix-icon{
  flex:0 0 auto;
  width:42px;height:42px;
  border-radius:11px;
  background:var(--acc-soft);
  display:grid;
  place-items:center;
  color:var(--ink);
}
.matrix-icon svg{width:22px;height:22px}
.matrix-item h3{font-size:17px;margin-bottom:6px;font-weight:700}
.matrix-item p{font-size:14.5px;color:var(--tx-2);line-height:1.75}

/* ============ FAQ ============ */
.faq-wrap{max-width:920px;margin:0 auto}
.accordion-item{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-m)!important;
  margin-bottom:14px;
  overflow:hidden;
  box-shadow:var(--sh-1);
}
.accordion-item:last-child{margin-bottom:0}
.accordion-button{
  background:var(--white);
  color:var(--ink);
  font-size:17px;
  font-weight:700;
  padding:20px 22px;
  box-shadow:none!important;
  display:flex;
  align-items:center;
  gap:14px;
  line-height:1.6;
}
.accordion-button:not(.collapsed){
  background:var(--acc-soft);
  color:var(--ink);
}
.accordion-button::after{display:none}
.acc-mark{
  margin-left:auto;
  flex:0 0 auto;
  width:20px;height:20px;
  position:relative;
  color:var(--ink-3);
}
.acc-mark::before{
  content:"";
  position:absolute;
  left:2px;right:2px;top:9px;
  height:2px;
  background:currentColor;
}
.acc-mark::after{
  content:"";
  position:absolute;
  top:2px;bottom:2px;left:9px;
  width:2px;
  background:currentColor;
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.accordion-button:not(.collapsed) .acc-mark::after{transform:scaleY(0);opacity:0}
.accordion-button:not(.collapsed) .acc-mark{color:var(--ink)}
.accordion-body{
  padding:4px 22px 24px;
  font-size:16px;
  color:var(--tx-2);
  background:var(--acc-soft);
  line-height:1.9;
}

/* ============ CTA 条 ============ */
.cta-band{
  background:var(--ink-deep);
  color:var(--paper);
  border-radius:var(--r-l);
  padding:52px 48px;
  display:grid;
  grid-template-columns:minmax(0,1.3fr) auto;
  gap:32px;
  align-items:center;
  position:relative;
  overflow:hidden;
  clip-path:polygon(18px 0,100% 0,100% calc(100% - 18px),calc(100% - 18px) 100%,0 100%,0 18px);
}
.cta-band::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(246,244,238,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(246,244,238,.05) 1px,transparent 1px);
  background-size:24px 24px;
  pointer-events:none;
}
.cta-band .cta-copy{position:relative}
.cta-band h2{
  color:var(--paper);
  font-size:clamp(22px,2.4vw,30px);
  margin-bottom:12px;
}
.cta-band p{color:rgba(246,244,238,.72);font-size:16px;max-width:600px}
.cta-actions{position:relative;display:flex;gap:14px;flex-wrap:wrap}
.cta-band .btn-ghost{
  color:var(--paper);
  border-color:rgba(246,244,238,.45);
}
.cta-band .btn-ghost:hover{background:rgba(20,200,160,.16);border-color:var(--acc);color:var(--paper)}

/* ============ 相邻分类互链 ============ */
.related-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:28px;
}
.related-card{
  display:block;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-c);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.related-card:hover{
  transform:translateY(-3px);
  box-shadow:var(--sh-2);
  border-color:rgba(20,200,160,.3);
}
.related-card .rc-media{overflow:hidden}
.related-card img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
  transition:transform .3s var(--ease);
}
.related-card:hover img{transform:scale(1.04)}
.related-card .rc-body{padding:24px 26px 26px}
.related-card .rc-badge{
  display:inline-flex;
  align-items:center;
  height:28px;
  padding:0 12px;
  border-radius:var(--r-p);
  background:var(--acc-soft);
  color:var(--ink);
  font-size:12.5px;
  letter-spacing:.06em;
  margin-bottom:14px;
}
.related-card h3{font-size:19px;margin-bottom:10px}
.related-card p{font-size:15px;color:var(--tx-2);margin-bottom:16px}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--ink-deep);
  color:var(--paper);
  padding:68px 0 0;
  position:relative;
  margin-top:0;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,rgba(242,160,61,.9),rgba(242,160,61,.15));
}
.site-footer::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(246,244,238,.04) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(246,244,238,.04) 1px,transparent 1px);
  background-size:24px 24px;
  pointer-events:none;
}
.footer-grid{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.4fr;
  gap:40px;
  padding-bottom:56px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:18px}
.footer-brand .brand-mark{width:40px;height:40px;background:rgba(246,244,238,.08)}
.footer-brand .brand-key{color:var(--paper);font-size:15px}
.footer-brand .brand-sub{color:rgba(246,244,238,.55)}
.footer-about{
  font-size:14.5px;
  line-height:1.85;
  color:rgba(246,244,238,.68);
  max-width:360px;
}
.footer-title{
  font-size:14px;
  font-weight:500;
  color:var(--paper);
  letter-spacing:.1em;
  margin-bottom:18px;
}
.footer-links{display:flex;flex-direction:column;gap:12px}
.footer-links a{
  font-size:14px;
  color:rgba(246,244,238,.68);
  display:inline-flex;
  align-items:center;
  gap:6px;
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer-links a::after{
  content:"›";
  opacity:0;
  transform:translateX(-4px);
  transition:opacity .2s var(--ease),transform .2s var(--ease);
}
.footer-links a:hover{color:var(--acc);transform:translateX(2px)}
.footer-links a:hover::after{opacity:1;transform:translateX(1px)}
.footer-contact{
  font-size:14px;
  color:rgba(246,244,238,.68);
  line-height:1.8;
  margin-bottom:16px;
}
.footer-sub{display:flex;gap:10px;flex-wrap:wrap}
.footer-sub input{
  flex:1 1 180px;
  height:48px;
  padding:0 16px;
  border-radius:10px;
  border:1px solid rgba(246,244,238,.24);
  background:rgba(246,244,238,.06);
  color:var(--paper);
  font-size:15px;
  outline:none;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.footer-sub input::placeholder{color:rgba(246,244,238,.42)}
.footer-sub input:focus{
  border-color:var(--acc);
  box-shadow:0 0 0 2px rgba(20,200,160,.35);
}
.footer-sub button{
  height:48px;
  padding:0 22px;
  border-radius:10px;
  background:var(--acc);
  color:var(--ink-deep);
  font-size:15px;
  font-weight:500;
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.footer-sub button:hover{background:#0FB78F;transform:translateY(-1px)}
.footer-note{
  font-size:12.5px;
  color:rgba(246,244,238,.5);
  margin-top:12px;
  line-height:1.7;
}
.footer-bottom{
  position:relative;
  z-index:1;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  flex-wrap:wrap;
  padding:22px 0 28px;
  border-top:1px solid rgba(246,244,238,.12);
  font-size:13px;
  color:rgba(246,244,238,.55);
}
.footer-bottom a{color:rgba(246,244,238,.7)}
.footer-bottom a:hover{color:var(--acc)}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;
  right:24px;
  bottom:28px;
  width:44px;height:44px;
  border-radius:var(--r-s);
  background:var(--ink-deep);
  color:var(--paper);
  display:grid;
  place-items:center;
  box-shadow:var(--sh-2);
  opacity:0;
  visibility:hidden;
  transform:translateY(8px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s var(--ease),background .2s var(--ease);
  z-index:900;
}
.to-top.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--ink-2)}

/* ============ 响应式 ============ */
@media (max-width:1399px){
  .shell{max-width:1140px}
}
@media (max-width:1199px){
  .shell{max-width:960px}
  .nav-left,.nav-right{gap:18px}
  .nav-link{font-size:14px}
  .brand-key{font-size:14px}
  .guide-layout{grid-template-columns:200px minmax(0,1fr);gap:36px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
  .footer-grid > div:last-child{grid-column:1 / -1}
}
@media (max-width:991px){
  body{font-size:16px;line-height:1.85}
  .shell{max-width:100%;padding:0 20px}
  .nav-shell{grid-template-columns:auto 1fr auto;height:64px;gap:12px}
  .site-header.is-scrolled .nav-shell{height:60px}
  .nav-left,.nav-right{display:none}
  .nav-toggle{display:grid;justify-self:start}
  .brand{justify-self:center}
  .brand-mark{width:34px;height:34px;border-radius:9px}
  .brand-mark svg{width:20px;height:20px}
  .brand-key{font-size:13px}
  .brand-sub{display:none}
  .mobile-panel{display:block}
  .mobile-cta-wrap{justify-self:end}
  .page-hero{padding:36px 0 44px}
  .hero-inner{grid-template-columns:1fr;gap:28px;min-height:0}
  .hero-visual{order:-1}
  .hero-visual img{aspect-ratio:16/9}
  .section{padding:72px 0}
  .guide-layout{grid-template-columns:1fr;gap:32px}
  .sticky-toc{position:static}
  .entry{grid-template-columns:1fr;gap:24px;padding-bottom:48px}
  .entry.is-flip .entry-media{order:0}
  .entries{gap:48px}
  .matrix{grid-template-columns:1fr}
  .cta-band{grid-template-columns:1fr;padding:40px 28px;gap:24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-grid > div:last-child{grid-column:1 / -1}
}
@media (max-width:767px){
  .section{padding:56px 0}
  .page-hero{padding:28px 0 36px}
  .related-grid{grid-template-columns:1fr}
  .cta-band{padding:34px 22px}
  .cta-actions{width:100%}
  .cta-actions .btn-main,.cta-actions .btn-ghost{width:100%}
  .section-head{margin-bottom:32px}
}
@media (max-width:575px){
  .shell{padding:0 16px}
  .mobile-panel .panel-inner{padding:10px 16px 24px}
  .page-hero h1{font-size:27px}
  .hero-lead{font-size:15.5px}
  .entry h2{font-size:20px}
  .entry p{font-size:15.5px}
  .matrix-item{padding:22px 18px}
  .accordion-button{font-size:15.5px;padding:16px 16px}
  .accordion-body{padding:2px 16px 20px;font-size:15px}
  .cta-band h2{font-size:21px}
  .footer-grid{grid-template-columns:1fr}
  .footer-sub button{width:100%}
  .to-top{right:16px;bottom:18px}
  .related-card .rc-body{padding:20px 18px 22px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    transition-duration:.001ms!important;
    animation-duration:.001ms!important;
  }
}

/* roulang page: category2 */
:root{
  --ink:#12302E;
  --ink-deep:#0B211F;
  --ink-2:#1E4A45;
  --ink-3:#2F6A63;
  --acc:#14C8A0;
  --acc-dark:#11B893;
  --acc-soft:#D6F5EC;
  --amber:#F2A03D;
  --bg:#F6F4EE;
  --bg-alt:#ECEEE8;
  --white:#FFFFFF;
  --text:#16211F;
  --text-2:#5A6763;
  --text-3:#8D9694;
  --line:rgba(18,48,46,.12);
  --line-strong:rgba(18,48,46,.24);
  --r-sm:8px;
  --r-md:12px;
  --r-card:16px;
  --r-lg:24px;
  --r-pill:999px;
  --sh-1:0 2px 8px rgba(18,48,46,.06);
  --sh-2:0 12px 28px rgba(18,48,46,.12);
  --ease:cubic-bezier(.2,.7,.3,1);
  --t:200ms var(--ease);
  --num:"Inter","SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:17px;
  font-weight:400;
  line-height:1.9;
  letter-spacing:0;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--ink);letter-spacing:-.01em;}
h1{font-size:clamp(28px,4.2vw,52px);line-height:1.25;}
h2{font-size:clamp(22px,2.6vw,34px);line-height:1.35;}
h3{font-size:19px;line-height:1.5;font-weight:500;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
button,input{font-family:inherit;}
:focus-visible{outline:2px solid var(--acc);outline-offset:2px;border-radius:4px;}
section[id],div[id]{scroll-margin-top:96px;}

.shell{
  width:100%;
  max-width:1320px;
  margin:0 auto;
  padding:0 24px;
}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(246,244,238,.94);
  backdrop-filter:blur(8px);
  border-bottom:1px solid transparent;
  transition:border-color var(--t),box-shadow var(--t),background var(--t);
}
.site-header.is-scrolled{
  border-bottom-color:var(--line);
  box-shadow:0 2px 12px rgba(18,48,46,.07);
}
.header-inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:24px;
  min-height:76px;
  transition:min-height var(--t);
}
.site-header.is-scrolled .header-inner{min-height:60px;}
.nav-left,.nav-right{display:flex;align-items:center;gap:26px;}
.nav-left{justify-self:start;}
.nav-right{justify-self:end;gap:18px;}
.nav-link{
  position:relative;
  font-size:15px;
  font-weight:500;
  color:var(--text-2);
  text-decoration:none;
  padding:8px 2px;
  transition:color var(--t);
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:2px;
  height:2px;
  background:var(--acc);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform var(--t);
}
.nav-link:hover{color:var(--acc);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--ink);}
.nav-link.is-active::after{transform:scaleX(1);}
.nav-link.is-active::before{
  content:"";
  position:absolute;
  left:-12px;top:50%;
  width:4px;height:4px;
  margin-top:-2px;
  background:var(--acc);
}
.logo{
  justify-self:center;
  display:flex;
  align-items:center;
  gap:10px;
  text-decoration:none;
  padding:4px 6px;
}
.brand-mark{
  width:42px;height:42px;
  display:grid;place-items:center;
  background:var(--ink);
  border-radius:var(--r-sm);
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
  flex:0 0 auto;
}
.brand-mark svg{width:24px;height:24px;}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.site-header .brand-key{
  font-size:15px;font-weight:700;color:var(--ink);
  letter-spacing:-.01em;white-space:nowrap;
}
.site-header .brand-sub{
  font-size:11px;color:var(--text-3);letter-spacing:.08em;white-space:nowrap;
}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--line);
  background:var(--white);
  border-radius:var(--r-sm);
  padding:0;
  cursor:pointer;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:5px;
}
.nav-toggle span{
  display:block;
  width:18px;height:2px;
  background:var(--ink);
  transition:transform var(--t),opacity var(--t);
}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.cta-short{display:none;}

.mobile-panel{
  display:none;
  position:absolute;
  left:0;right:0;top:100%;
  background:var(--ink-deep);
  border-top:1px solid rgba(246,244,238,.1);
  box-shadow:0 20px 40px rgba(11,33,31,.28);
}
.mobile-panel.is-open{display:block;}
.mobile-panel-inner{
  padding:10px 24px 28px;
  display:flex;
  flex-direction:column;
}
.m-link{
  display:flex;
  align-items:center;
  min-height:48px;
  color:rgba(246,244,238,.84);
  font-size:16px;
  text-decoration:none;
  border-bottom:1px solid rgba(246,244,238,.08);
  transition:color var(--t);
}
.m-link:hover{color:var(--acc);}
.m-link.is-active{color:var(--acc);}
.m-cta{margin-top:22px;width:100%;}
body.nav-locked{overflow:hidden;}

/* ============ 按钮与链接 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-size:15px;
  font-weight:500;
  line-height:1;
  padding:15px 26px;
  border-radius:10px;
  border:1.5px solid transparent;
  text-decoration:none;
  cursor:pointer;
  transition:transform var(--t),background-color var(--t),color var(--t),box-shadow var(--t),border-color var(--t);
  white-space:nowrap;
}
.btn-primary{
  background:var(--acc);
  color:var(--ink-deep);
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
}
.btn-primary:hover{
  background:var(--acc-dark);
  transform:translateY(-2px);
  box-shadow:0 10px 22px rgba(20,200,160,.28);
}
.btn-primary:active{transform:translateY(0);}
.btn-outline{
  background:transparent;
  border-color:var(--ink);
  color:var(--ink);
}
.btn-outline:hover{
  background:var(--acc-soft);
  border-color:var(--ink-3);
  transform:translateY(-2px);
}
.btn-sm{padding:11px 18px;font-size:14px;}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:15px;
  font-weight:500;
  color:var(--ink);
  text-decoration:none;
  border-bottom:1.5px solid rgba(20,200,160,.45);
  padding-bottom:2px;
  transition:color var(--t),border-color var(--t);
}
.link-arrow span{transition:transform var(--t);}
.link-arrow:hover{color:var(--acc);border-color:var(--acc);}
.link-arrow:hover span{transform:translateX(3px);}

.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:13px;
  font-weight:500;
  letter-spacing:.04em;
  color:var(--ink);
  background:var(--acc-soft);
  border-radius:var(--r-pill);
  padding:6px 14px;
}
.chip-amber{
  background:rgba(242,160,61,.14);
  color:#9C6216;
}
.date-num{
  font-family:var(--num);
  font-size:13px;
  letter-spacing:.04em;
  color:var(--amber);
}

/* ============ 页面首屏 ============ */
.page-hero{
  position:relative;
  background:var(--bg);
  padding:52px 0 56px;
  overflow:hidden;
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(18,48,46,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(18,48,46,.05) 1px,transparent 1px);
  background-size:24px 24px;
  pointer-events:none;
}
.page-hero-grid{
  position:relative;
  display:grid;
  grid-template-columns:1.35fr .9fr;
  gap:48px;
  align-items:center;
  min-height:320px;
}
.crumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-3);
  margin-bottom:18px;
  flex-wrap:wrap;
}
.crumb a{color:var(--text-3);text-decoration:none;transition:color var(--t);}
.crumb a:hover{color:var(--acc);}
.crumb-sep{color:var(--line-strong);}
.page-hero h1{margin-bottom:18px;max-width:18ch;}
.page-hero-lead{
  font-size:17px;
  color:var(--text-2);
  max-width:56ch;
  margin-bottom:24px;
}
.page-hero-meta{display:flex;gap:10px;flex-wrap:wrap;}
.page-hero-figure{margin:0;position:relative;}
.page-hero-figure img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  border-radius:var(--r-md);
  box-shadow:var(--sh-2);
}
.page-hero-figure::after{
  content:"";
  position:absolute;
  inset:0;
  border-radius:var(--r-md);
  background:linear-gradient(140deg,rgba(18,48,46,.62),rgba(11,33,31,.14) 60%,rgba(18,48,46,.5));
  pointer-events:none;
}

/* ============ 锚点标签条 ============ */
.anchor-bar{
  background:var(--white);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.anchor-inner{
  display:flex;
  align-items:center;
  gap:20px;
  padding-top:14px;
  padding-bottom:14px;
  flex-wrap:wrap;
}
.anchor-label{
  font-size:13px;
  letter-spacing:.1em;
  color:var(--text-3);
  white-space:nowrap;
}
.anchor-tabs{display:flex;gap:10px;flex-wrap:wrap;}
.anchor-tab{
  font-size:14px;
  font-weight:500;
  color:var(--text-2);
  text-decoration:none;
  padding:8px 16px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  transition:all var(--t);
}
.anchor-tab:hover{color:var(--ink);background:var(--acc-soft);}
.anchor-tab.is-active{
  color:var(--ink);
  background:var(--acc-soft);
  border-color:rgba(20,200,160,.4);
}

/* ============ 通用板块 ============ */
.section{padding:92px 0;}
.section-white{background:var(--white);}
.section-alt{background:var(--bg-alt);}
.section-head{margin-bottom:48px;max-width:760px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.sec-num{
  display:block;
  font-family:var(--num);
  font-size:32px;
  font-weight:700;
  color:var(--amber);
  line-height:1;
  margin-bottom:12px;
  letter-spacing:-.02em;
}
.sec-sub{
  margin-top:14px;
  color:var(--text-2);
  font-size:16px;
}

/* ============ 横向滚动卡片区 ============ */
.scroller-wrap{position:relative;}
.scroller{
  display:flex;
  gap:24px;
  overflow-x:auto;
  padding:6px 4px 26px;
  scroll-snap-type:x mandatory;
  scrollbar-width:thin;
  scrollbar-color:var(--ink-3) rgba(18,48,46,.08);
}
.scroller::-webkit-scrollbar{height:8px;}
.scroller::-webkit-scrollbar-track{background:rgba(18,48,46,.08);border-radius:var(--r-pill);}
.scroller::-webkit-scrollbar-thumb{background:var(--ink-3);border-radius:var(--r-pill);transition:background var(--t);}
.scroller::-webkit-scrollbar-thumb:hover{background:var(--acc);}
.news-card{
  flex:0 0 360px;
  scroll-snap-align:start;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.news-card:hover{
  transform:translateY(-3px);
  box-shadow:var(--sh-2);
  border-color:rgba(20,200,160,.35);
}
.news-card-media{position:relative;overflow:hidden;}
.news-card-media img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  transition:transform 320ms var(--ease);
}
.news-card:hover .news-card-media img{transform:scale(1.04);}
.news-card-media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(160deg,rgba(18,48,46,.55),rgba(11,33,31,.1));
  pointer-events:none;
}
.card-tag{
  position:absolute;
  top:12px;left:12px;
  z-index:2;
  font-size:12px;
  font-weight:500;
  letter-spacing:.04em;
  color:var(--ink-deep);
  background:var(--acc-soft);
  padding:5px 12px;
  border-radius:6px;
  clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px);
}
.news-card-body{padding:24px 26px 26px;}
.news-card-body h3{margin-bottom:10px;font-size:18px;font-weight:700;}
.news-card-body p{
  font-size:15px;
  color:var(--text-2);
  line-height:1.8;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  margin-bottom:16px;
}
.news-card-foot{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  border-top:1px solid var(--line);
  padding-top:14px;
}

/* ============ 交错图文 ============ */
.split-row{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:56px;
  align-items:center;
  padding:44px 0;
  border-bottom:1px solid var(--line);
}
.split-row:last-child{border-bottom:0;padding-bottom:0;}
.split-row:first-child{padding-top:0;}
.split-row.rev .split-media{order:2;}
.split-row.rev .split-body{order:1;}
.split-media{margin:0;position:relative;}
.split-media img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
}
.split-num{
  position:absolute;
  top:-14px;left:-14px;
  font-family:var(--num);
  font-size:22px;
  font-weight:700;
  color:var(--ink-deep);
  background:var(--amber);
  width:48px;height:48px;
  display:grid;place-items:center;
  border-radius:var(--r-sm);
  clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px);
}
.split-body h2{margin-bottom:16px;}
.split-body h2 + p{margin-top:0;}
.split-body p{color:var(--text-2);font-size:16px;margin-bottom:14px;}
.point-list{margin:20px 0 24px;display:flex;flex-direction:column;gap:12px;}
.point-list li{
  position:relative;
  padding-left:22px;
  font-size:15px;
  color:var(--text-2);
  line-height:1.75;
}
.point-list li::before{
  content:"";
  position:absolute;
  left:0;top:.62em;
  width:8px;height:8px;
  background:var(--acc);
  border-radius:2px;
}

/* ============ 特性矩阵 ============ */
.matrix-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:2px;
  background:var(--line);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
}
.matrix-item{
  background:var(--white);
  padding:30px 32px;
  transition:background-color var(--t);
}
.matrix-item:hover{background:#FBFCFA;}
.m-ico{
  display:grid;
  place-items:center;
  width:44px;height:44px;
  border-radius:var(--r-sm);
  background:var(--acc-soft);
  margin-bottom:16px;
}
.m-ico svg{width:22px;height:22px;}
.matrix-item h3{font-size:17px;font-weight:700;margin-bottom:8px;}
.matrix-item p{font-size:15px;color:var(--text-2);line-height:1.8;margin:0;}

/* ============ FAQ ============ */
.faq-wrap{max-width:900px;margin:0 auto;}
.accordion.faq-acc{--bs-accordion-border-width:0;--bs-accordion-bg:transparent;}
.faq-acc .accordion-item{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  margin-bottom:14px;
  overflow:hidden;
  transition:border-color var(--t),box-shadow var(--t);
}
.faq-acc .accordion-item:hover{border-color:rgba(20,200,160,.35);}
.faq-acc .accordion-button{
  background:var(--white);
  color:var(--ink);
  font-size:17px;
  font-weight:500;
  padding:20px 24px;
  box-shadow:none;
  border-radius:0;
  gap:16px;
}
.faq-acc .accordion-button::after{
  content:"";
  width:14px;height:14px;
  flex:0 0 14px;
  margin-left:auto;
  background:
    linear-gradient(var(--ink),var(--ink)) center/14px 2px no-repeat,
    linear-gradient(var(--ink),var(--ink)) center/2px 14px no-repeat;
  transition:transform var(--t);
}
.faq-acc .accordion-button:not(.collapsed){
  background:var(--acc-soft);
  color:var(--ink);
  box-shadow:none;
}
.faq-acc .accordion-button:not(.collapsed)::after{transform:rotate(45deg);}
.faq-acc .accordion-button:focus{box-shadow:0 0 0 2px var(--acc);border-color:transparent;}
.faq-acc .accordion-body{
  padding:18px 24px 24px;
  font-size:16px;
  color:var(--text-2);
  line-height:1.85;
  border-top:1px solid rgba(18,48,46,.08);
}

/* ============ CTA 区 ============ */
.cta-band{
  background:var(--ink);
  color:#F6F4EE;
  padding:76px 0;
  position:relative;
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(246,244,238,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(246,244,238,.05) 1px,transparent 1px);
  background-size:24px 24px;
  pointer-events:none;
}
.cta-grid{
  position:relative;
  display:grid;
  grid-template-columns:1.1fr 1fr;
  gap:56px;
  align-items:center;
}
.cta-band h2{color:#F6F4EE;}
.cta-band p{color:rgba(246,244,238,.74);font-size:16px;margin-top:14px;}
.cta-form label{
  display:block;
  font-size:13px;
  letter-spacing:.06em;
  color:rgba(246,244,238,.66);
  margin-bottom:8px;
}
.cta-row{display:flex;gap:12px;}
.cta-form input{
  flex:1;
  height:48px;
  border-radius:10px;
  border:1px solid rgba(246,244,238,.22);
  background:rgba(246,244,238,.07);
  color:#F6F4EE;
  padding:0 16px;
  font-size:15px;
  transition:border-color var(--t),box-shadow var(--t),background-color var(--t);
}
.cta-form input::placeholder{color:rgba(246,244,238,.42);}
.cta-form input:focus{
  outline:none;
  border-color:var(--acc);
  box-shadow:0 0 0 2px rgba(20,200,160,.35);
  background:rgba(246,244,238,.12);
}
.form-note{
  font-size:13px;
  color:rgba(246,244,238,.56);
  margin-top:12px;
}
.form-note.is-ok{color:var(--acc);}
.form-note.is-error{color:#F2A03D;}

/* ============ 相邻分类 ============ */
.cross-links{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:24px;
  padding:72px 0 0;
}
.cross-card{
  display:block;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:28px 30px;
  text-decoration:none;
  box-shadow:var(--sh-1);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.cross-card:hover{
  transform:translateY(-3px);
  box-shadow:var(--sh-2);
  border-color:rgba(20,200,160,.35);
}
.cross-label{
  display:inline-block;
  font-size:12px;
  letter-spacing:.1em;
  color:var(--amber);
  margin-bottom:12px;
}
.cross-card h3{font-size:19px;margin-bottom:10px;}
.cross-card p{font-size:15px;color:var(--text-2);margin-bottom:16px;}
.cross-card .link-arrow{border-bottom-color:rgba(20,200,160,.45);}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--ink-deep);
  color:#F6F4EE;
  padding:72px 0 0;
  border-top:1px solid var(--amber);
  position:relative;
}
.site-footer::before{
  content:"";
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(246,244,238,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(246,244,238,.04) 1px,transparent 1px);
  background-size:24px 24px;
  pointer-events:none;
}
.footer-grid{
  position:relative;
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.4fr;
  gap:44px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:18px;}
.site-footer .brand-mark{width:38px;height:38px;background:rgba(246,244,238,.08);}
.site-footer .brand-key{font-size:15px;font-weight:700;color:#F6F4EE;display:block;line-height:1.3;}
.site-footer .brand-sub{font-size:11px;color:rgba(246,244,238,.56);letter-spacing:.06em;display:block;}
.footer-about{
  font-size:14px;
  line-height:1.85;
  color:rgba(246,244,238,.7);
  max-width:36ch;
  margin:0;
}
.footer-title{
  font-size:15px;
  font-weight:500;
  color:#F6F4EE;
  margin:0 0 18px;
}
.footer-links{display:flex;flex-direction:column;gap:12px;}
.footer-links a{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  color:rgba(246,244,238,.74);
  text-decoration:none;
  transition:color var(--t),transform var(--t);
}
.footer-links a::after{
  content:"→";
  opacity:0;
  transform:translateX(-4px);
  transition:opacity var(--t),transform var(--t);
  font-size:13px;
}
.footer-links a:hover{color:var(--acc);transform:translateX(2px);}
.footer-links a:hover::after{opacity:1;transform:translateX(0);}
.footer-contact{
  font-size:14px;
  line-height:1.85;
  color:rgba(246,244,238,.7);
  margin:0 0 16px;
}
.footer-sub{display:flex;gap:8px;}
.footer-sub input{
  flex:1;
  min-width:0;
  height:48px;
  border-radius:10px;
  border:1px solid rgba(246,244,238,.22);
  background:rgba(246,244,238,.06);
  color:#F6F4EE;
  padding:0 14px;
  font-size:15px;
  transition:border-color var(--t),box-shadow var(--t);
}
.footer-sub input::placeholder{color:rgba(246,244,238,.42);}
.footer-sub input:focus{
  outline:none;
  border-color:var(--acc);
  box-shadow:0 0 0 2px rgba(20,200,160,.35);
}
.footer-sub button{
  height:48px;
  padding:0 20px;
  border:0;
  border-radius:10px;
  background:var(--acc);
  color:var(--ink-deep);
  font-size:14px;
  font-weight:500;
  cursor:pointer;
  transition:background-color var(--t),transform var(--t);
}
.footer-sub button:hover{background:var(--acc-dark);transform:translateY(-2px);}
.footer-note{
  font-size:12px;
  color:rgba(246,244,238,.52);
  margin:12px 0 0;
  line-height:1.7;
}
.footer-note.is-ok{color:var(--acc);}
.footer-note.is-error{color:var(--amber);}
.footer-bottom{
  position:relative;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  flex-wrap:wrap;
  margin-top:56px;
  padding:20px 0 28px;
  border-top:1px solid rgba(246,244,238,.12);
  font-size:13px;
  color:rgba(246,244,238,.56);
}
.footer-bottom a{color:var(--acc);text-decoration:none;}
.footer-bottom a:hover{text-decoration:underline;}

/* ============ 返回顶部 ============ */
.back-top{
  position:fixed;
  right:24px;bottom:24px;
  width:44px;height:44px;
  display:grid;place-items:center;
  background:var(--ink);
  color:#F6F4EE;
  border:1px solid rgba(246,244,238,.16);
  border-radius:var(--r-sm);
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(8px);
  transition:opacity var(--t),transform var(--t),visibility var(--t),background-color var(--t);
  z-index:70;
}
.back-top.is-show{opacity:1;visibility:visible;transform:translateY(0);}
.back-top:hover{background:var(--ink-2);}
.back-top svg{width:18px;height:18px;}

/* ============ 响应式 ============ */
@media (max-width:1399px){
  .shell{max-width:1140px;}
}
@media (max-width:1199px){
  .shell{max-width:960px;}
  .split-row{gap:40px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:36px;}
  .footer-grid > div:last-child{grid-column:1 / -1;}
}
@media (max-width:991px){
  body{font-size:16px;line-height:1.85;}
  .shell{padding:0 20px;}
  .header-inner{grid-template-columns:auto 1fr auto;gap:12px;min-height:64px;}
  .site-header.is-scrolled .header-inner{min-height:58px;}
  .nav-toggle{display:flex;}
  .nav-left{display:none;}
  .nav-right{gap:10px;}
  .nav-right .nav-link{display:none;}
  .cta-full{display:none;}
  .cta-short{display:inline;}
  .logo{gap:8px;}
  .brand-mark{width:34px;height:34px;}
  .site-header .brand-key{font-size:13px;}
  .site-header .brand-sub{display:none;}
  .page-hero{padding:36px 0 44px;}
  .page-hero-grid{grid-template-columns:1fr;gap:28px;min-height:0;}
  .page-hero h1{max-width:none;}
  .page-hero-figure{order:-1;}
  .page-hero-figure img{aspect-ratio:4/3;}
  .section{padding:72px 0;}
  .section-head{margin-bottom:36px;}
  .split-row{grid-template-columns:1fr;gap:28px;padding:36px 0;}
  .split-row.rev .split-media{order:0;}
  .split-row.rev .split-body{order:0;}
  .matrix-grid{grid-template-columns:1fr;}
  .cta-grid{grid-template-columns:1fr;gap:32px;}
  .cross-links{grid-template-columns:1fr;padding-top:56px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-grid > div:last-child{grid-column:1 / -1;}
  .news-card{flex:0 0 320px;}
}
@media (max-width:575px){
  .shell{padding:0 16px;}
  .page-hero h1{font-size:26px;}
  .page-hero-lead{font-size:16px;}
  .section{padding:56px 0;}
  .news-card{flex:0 0 280px;}
  .news-card-body{padding:20px 20px 22px;}
  .split-num{width:40px;height:40px;font-size:18px;top:-10px;left:-8px;}
  .cta-row{flex-direction:column;}
  .cta-row .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-sub{flex-direction:column;}
  .footer-sub button{width:100%;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .back-top{right:16px;bottom:16px;}
  .anchor-inner{gap:12px;}
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    transition-duration:.001ms !important;
  }
}