/* roulang page: index */
/* ========== 设计变量 ========== */
:root{
  /* 品牌色系 */
  --clr-brand: #D4FF3F;
  --clr-brand-hover: #b7e72f;
  --clr-accent: #F59E0B;
  --clr-ink: #111827;
  --clr-ink-soft: #1C2635;
  --clr-body-bg: #F6F6F4;
  --clr-surface: #FFFFFF;
  --clr-surface-muted: #F0F0EE;
  --clr-text: #22272E;
  --clr-muted: #8A929C;
  --clr-on-dark: #D1D5DB;
  --clr-border: #E8E6E1;
  --clr-dark-border: rgba(255,255,255,.08);

  /* 字体 */
  --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;

  /* 字号 */
  --fs-h1: 2.25rem;
  --fs-h2: 1.75rem;
  --fs-h3: 1.25rem;
  --fs-body: 1rem;
  --fs-small: .875rem;

  /* 间距 */
  --space-section: 5rem;
  --space-section-sm: 3rem;

  /* 圆角与阴影 */
  --radius-card: 12px;
  --radius-control: 8px;
  --shadow-card: 0 1px 3px rgba(17,24,39,.06), 0 4px 16px rgba(17,24,39,.05);
  --shadow-hover: 0 8px 30px rgba(17,24,39,.12);
}

/* ========== Reset / 基础层 ========== */
*, *::before, *::after{ box-sizing: border-box; }

html{ scroll-behavior: smooth; }

body{
  margin: 0;
  font-family: var(--font-cn);
  font-size: var(--fs-body);
  line-height: 1.75;
  background: var(--clr-body-bg);
  color: var(--clr-text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; transition: color .25s ease; }
a:hover{ color: var(--clr-accent); }

.container{ max-width: 1200px; }
.py-section{ padding-top: var(--space-section); padding-bottom: var(--space-section); }
.mt-section{ margin-top: var(--space-section); }

h1,h2,h3,h4{
  color: var(--clr-heading, var(--clr-text));
  line-height: 1.3;
  font-weight: 700;
}

p{
  margin: 0 0 1.25em;
  max-width: 32rem;
}
p:last-child{ margin-bottom: 0; }

.text-muted-custom{ color: var(--clr-muted); }

/* 链接与按钮基础重置 / 覆盖 bootstrap 默认 */
a, .btn{
  -webkit-tap-highlight-color: transparent;
  outline: none;
}

.btn{
  --bs-btn-border-radius: var(--radius-control);
  padding: .65rem 1.35rem;
  font-weight: 600;
  font-family: var(--font-cn);
  border-radius: var(--radius-control);
  border: 1px solid transparent;
  transition: all .25s ease;
  letter-spacing: .01em;
}

.btn-primary{
  background: var(--clr-brand);
  color: var(--clr-ink);
  border-color: var(--clr-brand);
  --bs-btn-hover-bg: var(--clr-brand-hover);
  --bs-btn-hover-border-color: var(--clr-brand-hover);
}
.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active{
  background: var(--clr-brand-hover);
  border-color: var(--clr-brand-hover);
  color: var(--clr-ink);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(212,255,63,.25);
}
.btn-primary:focus-visible{
  box-shadow: 0 0 0 3px rgba(212,255,63,.35), 0 8px 20px rgba(212,255,63,.25);
}

.btn-outline-light{
  border: 2px solid rgba(255,255,255,.6);
  color: #fff;
  --bs-btn-hover-bg: rgba(255,255,255,.1);
  --bs-btn-hover-border-color: #fff;
  --bs-btn-active-bg: rgba(255,255,255,.2);
  --bs-btn-active-border-color: #fff;
}
.btn-outline-light:hover,
.btn-outline-light:focus{
  background: rgba(255,255,255,.1);
  border-color: #fff;
  color: #fff;
  transform: translateY(-2px);
}

.btn-dark-solid{
  background: var(--clr-ink);
  color: #fff;
  border-color: var(--clr-ink);
}
.btn-dark-solid:hover{
  background: var(--clr-ink-soft);
  border-color: var(--clr-ink-soft);
  color: #fff;
  transform: translateY(-2px);
}
.btn-accent{
  background: var(--clr-accent);
  border-color: var(--clr-accent);
  color: #111827;
}
.btn-accent:hover{
  background: #d97a06;
  border-color: #d97a06;
  color: #fff;
  transform: translateY(-2px);
}

/* ========== 顶栏 ========== */
.top-bar{
  background: var(--clr-ink);
  font-size: var(--fs-small);
  color: rgba(255,255,255,.72);
  border-bottom: 1px solid rgba(255,255,255,.06);
  padding: .5rem 0;
}
.top-bar .container{
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.top-bar i{
  color: var(--clr-brand);
  margin-right: .45rem;
}
.top-bar .top-bar-right span{
  white-space: nowrap;
}

/* ========== Header / 导航 ========== */
.site-header{
  position: sticky;
  top: 0;
  z-index: 1030;
  background: var(--clr-ink);
  box-shadow: 0 4px 20px rgba(0,0,0,.25);
}

.main-navbar{
  padding-top: 0;
  padding-bottom: 0;
  background: var(--clr-ink);
  font-family: var(--font-cn);
}

.brand-logo{
  display: inline-flex;
  align-items: center;
  gap: .25rem;
  font-size: 1.65rem;
  font-weight: 800;
  line-height: 1;
  padding: .4rem 0;
  letter-spacing: -0.01em;
}
.brand-logo .brand-51{
  color: #fff;
}
.brand-logo .brand-ink{
  color: var(--clr-brand);
}
.brand-logo:hover{
  color: #fff;
  opacity: .9;
}

.main-navbar .nav-item{
  margin: 0 .1rem;
}
.main-navbar .nav-link{
  color: #E5E7EB;
  font-weight: 500;
  padding: 1.15rem 1.2rem !important;
  position: relative;
  display: inline-flex;
  align-items: center;
  font-size: .98rem;
  transition: color .25s ease;
}
.main-navbar .nav-link::after{
  content: "";
  position: absolute;
  left: 1.2rem;
  right: 100%;
  bottom: .75rem;
  height: 2px;
  background: var(--clr-brand);
  transition: right .25s ease;
}
.main-navbar .nav-link:hover{
  color: var(--clr-brand);
}
.main-navbar .nav-link:hover::after,
.main-navbar .nav-link.active::after{
  right: 1.2rem;
}
.main-navbar .nav-link.active{
  color: #fff;
}

.navbar-cta{
  margin-left: .5rem;
}
.navbar-toggler{
  border: 1px solid rgba(255,255,255,.18);
  padding: .5rem .65rem;
  color: #fff;
  background: transparent;
  border-radius: var(--radius-control);
  transition: border-color .25s ease;
}
.navbar-toggler:focus{
  box-shadow: 0 0 0 3px rgba(212,255,63,.2);
}
.navbar-toggler i{
  color: #fff;
  font-size: 1.2rem;
}

/* ========== Hero 首屏旗舰店式横幅 ========== */
.hero-shadow {
  position: relative;
  background:
    linear-gradient(100deg, rgba(17,24,39,.94) 0%, rgba(23,31,44,.92) 42%, rgba(17,24,39,.68) 100%),
    url('/assets/images/backpic/back-1.jpg') center / cover no-repeat;
  color: #fff;
  padding-top: 5.5rem;
  padding-bottom: 5.5rem;
  border-bottom: 4px solid var(--clr-brand);
  overflow: hidden;
}
.hero-shadow::before{
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(212,255,63,.08) 0, transparent 32%);
  pointer-events: none;
}
.hero-kicker{
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: rgba(212,255,63,.12);
  border: 1px solid rgba(212,255,63,.35);
  color: var(--clr-brand);
  padding: .4rem 1rem;
  border-radius: 100px;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .04em;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
}
.hero-title{
  font-size: 3rem;
  line-height: 1.2;
  font-weight: 750;
  color: #fff;
  letter-spacing: -.02em;
  max-width: 12ch;
  margin-bottom: 1.2rem;
}
.hero-title .highlight{
  color: var(--clr-brand);
}
.hero-lead{
  color: rgba(255,255,255,.78);
  font-size: 1.05rem;
  line-height: 1.85;
  max-width: 34rem;
  margin-bottom: 2.25rem;
}
.hero-card{
  color: var(--clr-text);
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,.3);
  border-radius: var(--radius-card);
  padding: 1.25rem 1.35rem;
  box-shadow: 0 20px 40px rgba(0,0,0,.22);
}

.hero-quick-list{
  list-style: none;
  margin: 0;
  padding: 0;
}
.hero-quick-item{
  display: flex;
  gap: .9rem;
  align-items: flex-start;
  padding: .95rem .2rem;
  border-bottom: 1px solid #edebe6;
}
.hero-quick-item:last-child{
  border-bottom: none;
}
.hero-quick-index{
  font-size: 1.35rem;
  font-weight: 750;
  color: var(--clr-brand);
  background: rgba(212,255,63,.5);
  min-width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  color: var(--clr-ink);
}
.hero-quick-info h4{
  font-size: .98rem;
  margin-bottom: .1rem;
  color: var(--clr-text);
}
.hero-quick-info p{
  font-size: .85rem;
  margin-bottom: 0;
  color: var(--clr-muted);
  line-height: 1.6;
}
.hero-badge{
  display: inline-block;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.12);
  padding: .45rem .85rem;
  border-radius: 100px;
  font-size: .82rem;
  color: rgba(255,255,255,.7);
  margin: .8rem .3rem 0 0;
}
.hero-badge i{
  color: var(--clr-brand);
  margin-right: .3rem;
}

/* ========== 信任指标带 ========== */
.metric-strip{
  background: var(--clr-surface);
  border-bottom: 1px solid var(--clr-border);
  padding: 1.35rem 0;
}
.metric-cell{
  text-align: center;
  padding: .75rem .5rem;
  border-left: 1px solid var(--clr-border);
}
.metric-cell:first-child{ border-left: none; }
.metric-num{
  font-size: 2rem;
  font-weight: 800;
  color: var(--clr-ink);
  margin-bottom: .2rem;
  line-height: 1.2;
}
.metric-num small{
  font-size: 1rem;
  margin-left: .2rem;
  color: var(--clr-accent);
}
.metric-label{
  font-size: .8rem;
  color: var(--clr-muted);
  letter-spacing: .02em;
}

/* ========== 通用标题区 ========== */
.section-head{
  margin-bottom: 3rem;
}
.section-label{
  color: var(--clr-accent);
  font-weight: 700;
  letter-spacing: .08em;
  font-size: .8rem;
  margin-bottom: .7rem;
  display: block;
  text-transform: uppercase;
}
.section-title{
  font-size: var(--fs-h2);
  margin-bottom: 1rem;
  letter-spacing: -.01em;
}
.section-desc{
  color: var(--clr-muted);
  max-width: 32rem;
}
.section-light{
  background: #fff;
  border-top: 1px solid var(--clr-border);
}

/* ========== 案例卡片 ========== */
.case-card{
  background: #fff;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-card);
  padding: 2rem 1.75rem;
  box-shadow: var(--shadow-card);
  transition: all .3s ease;
  height: 100%;
}
.case-card:hover{
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.case-card-num{
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1;
  color: var(--clr-ink);
  opacity: .1;
  margin-bottom: 1.4rem;
}
.case-card-tag{
  font-size: .75rem;
  color: var(--clr-accent);
  font-weight: 700;
  letter-spacing: .05em;
  background: rgba(245,158,11,.08);
  padding: .3rem .8rem;
  border-radius: 100px;
  display: inline-block;
  margin-bottom: 1rem;
}
.case-card h3{
  font-size: 1.105rem;
  margin-bottom: .55rem;
}
.case-card p{
  color: var(--clr-muted);
  font-size: .92rem;
  margin-bottom: 1.2rem;
}
.case-tags{
  margin-top: .2rem;
}
.case-tags .badge-soft{
  background: #f3f2ef;
  color: #555b66;
}

/* ========== 深色数据段落 ========== */
.data-section{
  background: var(--clr-ink);
  color: var(--clr-text);
  position: relative;
  overflow: hidden;
}
.data-section::before{
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, transparent 60%, rgba(212,255,63,.04) 100%),
    url('/assets/images/backpic/back-2.jpg') center / cover;
  opacity: .12;
  mix-blend-mode: overlay;
  pointer-events: none;
}
.data-section .section-title{
  color: #fff;
}
.data-section .section-desc{
  color: rgba(255,255,255,.55);
}
.dark-panel{
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.09);
  border-radius: var(--radius-card);
  padding: 1.7rem 1.6rem;
  backdrop-filter: blur(6px);
}
.dark-panel h3{
  color: #fff;
  font-size: .95rem;
  font-weight: 700;
  margin-bottom: 1.15rem;
  letter-spacing: .02em;
  display: flex;
  align-items: center;
  gap: .5rem;
}
.dark-panel h3 i{
  color: var(--clr-brand);
}
.dark-panel .list-unstyled li{
  padding: .6rem 0;
  border-bottom: 1px dashed rgba(255,255,255,.1);
  font-size: .92rem;
  color: rgba(255,255,255,.74);
}
.dark-panel .list-unstyled li:last-child{
  border-bottom: none;
}
.dark-panel .list-unstyled li i{
  color: var(--clr-brand);
  margin-right: .45rem;
}

.data-num-card{
  background: #fff;
  border-radius: var(--radius-card);
  padding: 1.8rem 1.4rem;
  box-shadow: var(--shadow-card);
  text-align: center;
  border: 1px solid var(--clr-border);
  transition: all .25s ease;
}
.data-num-card:hover{
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.data-num-card .num{
  font-size: 2rem;
  font-weight: 800;
  color: var(--clr-ink);
  line-height: 1.2;
}
.data-num-card .num small{
  font-size: .9rem;
  margin-left: .2rem;
  color: var(--clr-accent);
}
.data-num-card .txt{
  font-size: .85rem;
  color: var(--clr-muted);
  margin-top: .4rem;
}

/* ========== 前后对比 ========== */
.compare-card{
  border-radius: var(--radius-card);
  border: 1px solid var(--clr-border);
  background: var(--clr-surface);
  box-shadow: var(--shadow-card);
  padding: 2rem;
  height: 100%;
}
.compare-card.dark-compare{
  background: var(--clr-ink);
  border-color: var(--clr-ink);
}
.compare-card .compare-icon{
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  font-size: 1.15rem;
  background: #f3f2ef;
  color: var(--clr-text);
  margin-bottom: 1.2rem;
}
.compare-card.dark-compare .compare-icon{
  background: var(--clr-brand);
  color: var(--clr-ink);
}
.compare-card h3{
  font-size: 1.2rem;
  margin-bottom: 1rem;
}
.compare-card.dark-compare h3{
  color: #fff;
}
.compare-card ul{
  list-style: none;
  margin: 0;
  padding: 0;
}
.compare-card ul li{
  padding: .5rem 0;
  color: var(--clr-text);
  font-size: .95rem;
}
.compare-card.dark-compare ul li{
  color: rgba(255,255,255,.82);
}
.compare-card ul li i{
  margin-right: .55rem;
  color: var(--clr-accent);
}
.compare-card.dark-compare ul li i{
  color: var(--clr-brand);
}

/* ========== 资讯列表 ========== */
.info-list-card{
  background: #fff;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-card);
  transition: all .25s ease;
}
.info-list-card:hover{
  box-shadow: var(--shadow-hover);
  border-color: rgba(212,255,63,.45);
  transform: translateY(-2px);
}
.info-list-card-inner{
  display: flex;
  flex: 1 1 auto;
  align-items: stretch;
}
.info-list-group{
  padding: 1.5rem;
  flex: 1;
}
.info-image-wrap{
  flex: 0 0 200px;
  overflow: hidden;
  position: relative;
}
.info-image-wrap img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.info-list-card:hover .info-image-wrap img{
  transform: scale(1.03);
}
.info-list-meta{
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: .4rem;
}
.badge-tag{
  background: rgba(212,255,63,.18);
  color: #45460f;
  font-size: .75rem;
  padding: .2rem .8rem;
  border-radius: 100px;
  font-weight: 600;
  display: inline-block;
}
.info-list-date{
  font-size: .78rem;
  color: var(--clr-muted);
}
.info-title{
  font-size: 1.125rem;
  font-weight: 650;
  color: var(--clr-text);
  margin-bottom: .5rem;
  line-height: 1.45;
  transition: color .2s ease;
  max-width: 100%;
  display: block;
}
.info-title:hover{
  color: #111827;
  text-decoration: underline;
  text-decoration-color: var(--clr-brand);
  text-underline-offset: 4px;
}
.info-desc{
  color: var(--clr-muted);
  font-size: .88rem;
  margin-bottom: .35rem;
}

/* 侧栏推荐 */
.small-side-card{
  background: #fff;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-card);
  padding: 1.25rem 1.25rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-card);
}
.small-side-card:hover{
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.side-date{
  color: var(--clr-muted);
  font-size: .78rem;
}
.side-title{
  font-weight: 650;
  font-size: .92rem;
  line-height: 1.5;
  margin-top: .3rem;
  display: block;
  color: var(--clr-text);
}
.side-title:hover{
  color: #111827;
  text-decoration: underline;
  text-decoration-color: var(--clr-brand);
  text-underline-offset: 3px;
}

/* 分类槽位卡片 */
.slot-card{
  background: #fff;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  height:100%;
  transition: all .25s ease;
  display: flex;
  flex-direction: column;
}
.slot-card:hover{
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.slot-card-media{
  height: 170px;
  min-height: 170px;
  overflow: hidden;
  border-radius: 0;
}
.slot-card-media img{
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.slot-card-body{
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.slot-card-tag{
  color: var(--clr-accent);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .04em;
  margin-bottom: .5rem;
}
.slot-card h3{
  font-size: 1.1rem;
  margin-bottom: .5rem;
}
.slot-card p{
  color: var(--clr-muted);
  font-size: .88rem;
}

/* ========== FAQ ========== */
.faq-accordion .accordion-item{
  background: #fff;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-card) !important;
  overflow: hidden;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-card);
}
.faq-accordion .accordion-button{
  background: #fff;
  box-shadow: none;
  padding: 1.35rem 1.5rem;
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--clr-text);
  display: flex;
  align-items: center;
  position: relative;
  border-bottom: 1px solid transparent;
}
.faq-accordion .accordion-button:not(.collapsed){
  color: var(--clr-ink);
  background: #fbfcff;
  border-bottom-color: var(--clr-border);
}
.faq-accordion .accordion-button::after{
  background-image: none;
  width: 28px;
  height: 28px;
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  content: "\f067";
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-ink);
  border-radius: 50%;
  background: rgba(212,255,63,.8);
  transition: all .25s ease;
}
.faq-accordion .accordion-button:not(.collapsed)::after{
  transform: rotate(45deg);
}
.faq-accordion .accordion-button:focus{
  box-shadow: 0 0 0 3px rgba(212,255,63,.35);
}
.faq-accordion .accordion-body{
  background: #fcfcfb;
  padding: 1.4rem 1.6rem 1.65rem;
  color: var(--clr-text);
  border-top: 1px solid #f0eeea;
}
.faq-accordion .accordion-body p{
  margin-bottom: .75em;
  max-width: 100%;
}

/* ========== CTA 横幅 ========== */
.cta-banner{
  background:
    linear-gradient(120deg, rgba(17,24,39,.96), rgba(25,34,48,.92)),
    url('/assets/images/backpic/back-4.jpg') center / cover;
  border-radius: 18px;
  padding: 3.5rem 3rem;
  color: #fff;
  overflow: hidden;
  position: relative;
  box-shadow: 0 18px 50px rgba(17,24,39,.24);
}
.cta-banner .cta-title{
  color: #fff;
  font-size: 1.9rem;
  font-weight: 750;
  margin-bottom: .8rem;
}
.cta-banner .cta-sub{
  color: rgba(255,255,255,.7);
  max-width: 30rem;
}
.cta-banner .btn{
  padding: .8rem 2.1rem;
  font-size: 1rem;
}

/* ========== 页脚 ========== */
.site-footer{
  background: var(--clr-ink);
  color: rgba(255,255,255,.6);
  padding-top: 4rem;
  margin-top: var(--space-section);
  border-top: 4px solid var(--clr-brand);
}
.footer-brand{
  color: #fff;
  font-weight: 800;
  font-size: 1.4rem;
}
.footer-title{
  color: #fff;
  font-weight: 600;
  margin-bottom: 1rem;
  font-size: 1rem;
}
.site-footer a{
  color: rgba(255,255,255,.55);
  transition: color .25s ease;
}
.site-footer a:hover{
  color: var(--clr-brand);
}
.footer-list{
  list-style: none;
  margin: 0;
  padding: 0;
}
.footer-list li{
  padding: .2rem 0;
}
.footer-bottom{
  border-top: 1px solid rgba(255,255,255,.09);
  margin-top: 2.5rem;
  padding: 1.4rem 0 1.2rem;
  color: rgba(255,255,255,.45);
  font-size: .85rem;
}
.footer-bottom .container{
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.copyright-name{
  color: rgba(255,255,255,.7);
  font-weight: 600;
}

/* ========== 响应式 ========== */
@media (max-width: 1199px){
  :root{ --fs-h1:2.1rem; }
  .hero-title{ font-size: 2.55rem; }
}

@media (max-width: 991.98px){
  .main-navbar .nav-link{
    padding: .9rem .6rem !important;
    font-size: 1rem;
    margin-left: 0;
  }
  .main-navbar .nav-item{ margin: 0; }
  .main-navbar .nav-link::after{
    left: .2rem;
  }
  .navbar-cta{
    display: inline-block;
    margin: .2rem 0 .8rem;
  }
  .collapse-show .navbar-nav{
    border-top: 1px solid rgba(255,255,255,.06);
    padding-top: .5rem;
  }
  .top-bar .top-bar-left{
    width: 100%;
    text-align: center;
    justify-content: center;
  }
  .top-bar .top-bar-right{
    display: none;
  }
  .hero-shadow{
    padding-top: 3.2rem;
    padding-bottom: 3.2rem;
  }
  .hero-title{
    font-size: 2.25rem;
  }
  .navbar-cta{
    margin-top: .6rem;
  }
}

@media (max-width: 767.98px){
  :root{
    --fs-h1: 1.75rem;
    --fs-h2: 1.5rem;
    --space-section: 3rem;
  }
  .top-bar{
    font-size: .78rem;
  }
  .brand-logo{
    font-size: 1.45rem;
  }
  .hero-title{
    font-size: 1.9rem;
    line-height: 1.28;
  }
  .hero-lead{
    font-size: .98rem;
  }
  .metric-strip .row{
    row-gap: .25rem;
  }
  .metric-cell{
    border-left: none;
    border-bottom: 1px solid var(--clr-border);
    padding: .8rem 0;
  }
  .metric-cell:last-child{
    border-bottom: none;
  }
  .section-head{
    margin-bottom: 2rem;
  }
  .cta-banner{
    padding: 2.5rem 1.5rem;
    border-radius: 14px;
  }
  .cta-banner .cta-title{
    font-size: 1.45rem;
  }
  .info-image-wrap{
    flex: 0 0 100%;
    height: 180px;
  }
  .info-list-card-inner{
    flex-direction: column;
  }
  .info-list-group{
    padding: 1.2rem;
  }
  .btn{
    padding: .6rem 1.15rem;
  }
}

@media (max-width: 575.98px){
  .hero-title{
    font-size: 1.72rem;
  }
  .navbar-cta{
    width: 100%;
  }
  .navbar-cta .btn{
    width: 100%;
  }
  .slot-card-media{
    height: 150px;
  }
  .brand-logo{
    font-size: 1.35rem;
  }
}

/* 无关默认清理 */
.btn:focus, a:focus, .form-control:focus{
  outline: none;
  box-shadow: none;
}
.form-control:focus{
  border-color: var(--clr-brand);
  box-shadow: 0 0 0 3px rgba(212,255,63,.35);
}

/* roulang page: category1 */
/* ========== 设计变量 ========== */
:root{
    --clr-brand: #D4FF3F;
    --clr-brand-hover: #b7e72f;
    --clr-accent: #F59E0B;
    --clr-ink: #111827;
    --clr-ink-soft: #1C2635;
    --clr-body-bg: #F6F6F4;
    --clr-surface: #FFFFFF;
    --clr-surface-muted: #F0F0EE;
    --clr-text: #22272E;
    --clr-muted: #8A929C;
    --clr-on-dark: #D1D5DB;
    --clr-border: #E8E6E1;
    --clr-dark-border: rgba(255,255,255,.08);
    --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
    --fs-h1: 2rem;
    --fs-h2: 1.75rem;
    --fs-h3: 1.25rem;
    --fs-body: 1rem;
    --fs-small: .875rem;
    --space-section: 5rem;
    --space-section-sm: 3rem;
    --radius-card: 12px;
    --radius-control: 8px;
    --shadow-card: 0 1px 3px rgba(17,24,39,.06), 0 4px 16px rgba(17,24,39,.05);
    --shadow-hover: 0 8px 30px rgba(17,24,39,.12);
}
@media (max-width: 991.98px){
    :root{ --fs-h1: 1.75rem; --fs-h2: 1.5rem; --space-section: 3rem; }
}
/* ========== Base ========== */
html{ scroll-behavior: smooth; }
body{
    margin: 0;
    font-family: var(--font-cn);
    font-size: var(--fs-body);
    line-height: 1.75;
    background: var(--clr-body-bg);
    color: var(--clr-text);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}
body, h1,h2,h3,h4,h5,h6,p,ul,ol,figure,blockquote{ margin: 0; }
ul[class], ol[class]{ padding: 0; list-style: none; }
img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; transition: color .25s ease; }
.container{ max-width: 1200px; }
::selection{ background: rgba(212,255,63,.28); }
a:focus-visible, .btn:focus-visible, .page-link:focus-visible{
    outline: 3px solid rgba(212,255,63,.55);
    outline-offset: 2px;
}
.section-label{
    display: inline-block;
    font-size: .8rem;
    font-weight: 700;
    letter-spacing: .14em;
    color: #111827;
    background: var(--clr-brand);
    border-radius: 100px;
    padding: .3rem .85rem;
    text-transform: uppercase;
}
.section-muted-label{
    color: var(--clr-muted);
    font-size: var(--fs-small);
}

/* ========== Header / 导航 ========== */
.site-header{
    position: sticky;
    top: 0;
    z-index: 1030;
    background: var(--clr-ink);
    box-shadow: 0 4px 20px rgba(0,0,0,.25);
}
.main-navbar{
    padding: 0;
    background: var(--clr-ink);
    font-family: var(--font-cn);
}
.navbar-brand{
    padding: .4rem 0;
    line-height: 1;
}
.brand-logo{
    display: inline-flex;
    align-items: center;
    gap: .25rem;
    font-size: 1.65rem;
    font-weight: 800;
    letter-spacing: -.01em;
    color: inherit;
}
.brand-logo .brand-51{ color: #fff; }
.brand-logo .brand-ink{ color: var(--clr-brand); }
.brand-logo:hover{ color: #fff; opacity: .9; }
.main-navbar .nav-item{ margin: 0 .1rem; }
.main-navbar .nav-link{
    color: #E5E7EB;
    font-weight: 500;
    padding: 1.15rem 1.2rem !important;
    position: relative;
    display: inline-flex;
    align-items: center;
    font-size: .98rem;
    transition: color .25s ease;
}
.main-navbar .nav-link::after{
    content: "";
    position: absolute;
    left: 1.2rem;
    right: 100%;
    bottom: .75rem;
    height: 2px;
    background: var(--clr-brand);
    transition: right .25s ease;
}
.main-navbar .nav-link:hover{ color: var(--clr-brand); }
.main-navbar .nav-link:hover::after,
.main-navbar .nav-link.active::after{ right: 1.2rem; }
.main-navbar .nav-link.active{ color: #fff; }
.navbar-cta{ margin-left: .5rem; }
.navbar-toggler{
    border: 1px solid rgba(255,255,255,.18);
    padding: .5rem .65rem;
    color: #fff;
    background: transparent;
    border-radius: var(--radius-control);
    transition: border-color .25s ease;
}
.navbar-toggler:focus{ box-shadow: 0 0 0 3px rgba(212,255,63,.2); }
.navbar-toggler i{ color: #fff; font-size: 1.2rem; }

/* ========== 通用按钮 ========== */
.btn{
    --bs-btn-border-radius: var(--radius-control);
    padding: .65rem 1.35rem;
    font-weight: 600;
    font-family: var(--font-cn);
    border-radius: var(--radius-control);
    border: 1px solid transparent;
    transition: all .25s ease;
    letter-spacing: .01em;
}
.btn-primary{
    background: var(--clr-brand);
    color: var(--clr-ink);
    border-color: var(--clr-brand);
}
.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active{
    background: var(--clr-brand-hover);
    border-color: var(--clr-brand-hover);
    color: var(--clr-ink);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(212,255,63,.22);
}
.btn-outline-light{
    border: 2px solid rgba(255,255,255,.55);
    color: #fff;
}
.btn-outline-light:hover,
.btn-outline-light:focus{
    background: rgba(255,255,255,.1);
    border-color: #fff;
    color: #fff;
    transform: translateY(-2px);
}

/* ========== 分类页横幅 ========== */
.category-banner{
    position: relative;
    background:
        linear-gradient(104deg, rgba(17,24,39,.96) 0%, rgba(23,31,44,.94) 48%, rgba(17,24,39,.78) 100%),
        url('/assets/images/backpic/back-3.jpg') center / cover no-repeat;
    color: #fff;
    padding: 4.25rem 0 4rem;
    border-bottom: 4px solid var(--clr-brand);
    overflow: hidden;
}
.category-banner::after{
    content: "";
    position: absolute;
    width: 420px;
    height: 420px;
    right: -160px;
    top: -160px;
    border-radius: 50%;
    background: rgba(212,255,63,.06);
    pointer-events: none;
}
.category-banner .breadcrumb{
    --bs-breadcrumb-divider: '/';
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
}
.category-banner .breadcrumb-item,
.category-banner .breadcrumb-item a{
    color: rgba(255,255,255,.6);
    font-size: .9rem;
}
.category-banner .breadcrumb-item a:hover{ color: var(--clr-brand); }
.category-banner .breadcrumb-item.active{ color: var(--clr-brand); }
.banner-h1{
    font-size: var(--fs-h1);
    font-weight: 700;
    line-height: 1.35;
    color: #fff;
    letter-spacing: -.01em;
    margin-bottom: 1.25rem;
}
.banner-h1 .slash{
    color: var(--clr-brand);
    padding: 0 .15rem;
}
.banner-lead{
    color: rgba(255,255,255,.78);
    max-width: 42rem;
    font-size: 1.02rem;
    line-height: 1.9;
    margin-bottom: 0;
}
.banner-side{
    position: relative;
    z-index: 1;
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.1);
    border-radius: var(--radius-card);
    padding: 1.4rem 1.5rem;
    margin-top: 2rem;
}
.banner-side .side-note-label{
    display: block;
    color: rgba(255,255,255,.5);
    font-size: .8rem;
    letter-spacing: .1em;
    margin-bottom: .6rem;
}
.banner-side .side-update{
    color: #fff;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: .5rem;
}
.banner-side .side-update i{ color: var(--clr-brand); }
.banner-side small{ color: rgba(255,255,255,.55); font-size: .8rem; }
@media (min-width: 992px){
    .banner-side{ margin-top: 0; min-width: 300px; }
}

/* ========== 分类列表主区 ========== */
.category-main{
    padding: var(--space-section) 0;
    background: var(--clr-body-bg);
}
.listing-heading-row{
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.75rem;
    flex-wrap: wrap;
}
.listing-title{
    font-size: var(--fs-h3);
    font-weight: 700;
    color: var(--clr-text);
    margin: .35rem 0 0;
}
.listing-note{
    color: var(--clr-muted);
    font-size: var(--fs-small);
}

/* 列表卡片 */
.category-article{
    background: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    transition: all .25s ease;
    margin-bottom: 1.5rem;
    overflow: hidden;
}
.category-article:hover{
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}
.category-row-inner{
    display: flex;
    flex-direction: column;
}
.category-cover{
    position: relative;
    overflow: hidden;
    background: #dfe0dc;
    aspect-ratio: 16 / 8;
    flex: 0 0 auto;
}
.category-cover img{
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .4s ease;
}
.category-article:hover .category-cover img{ transform: scale(1.02); }
.cover-badge{
    position: absolute;
    left: .9rem;
    top: .9rem;
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    background: rgba(17,24,39,.82);
    color: #fff;
    font-size: .72rem;
    font-weight: 600;
    padding: .25rem .7rem;
    border-radius: 100px;
    backdrop-filter: blur(4px);
}
.cover-badge i{ color: var(--clr-brand); font-size: .65rem; }
.category-content{
    padding: 1.5rem 1.5rem 1.6rem;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    flex: 1;
}
.article-tag{
    display: inline-flex;
    align-items: center;
    font-size: .75rem;
    font-weight: 600;
    color: #2d2f2a;
    background: #EEF5D3;
    border-radius: 100px;
    padding: .18rem .8rem;
    margin: 0 .5rem 0 0;
}
.article-tag.tag-warm{
    color: #8a4d03;
    background: #FDF1D7;
}
.article-date{
    font-size: .8rem;
    color: var(--clr-muted);
    display: inline-flex;
    align-items: center;
    gap: .35rem;
}
.category-title{
    font-size: 1.2rem;
    font-weight: 700;
    line-height: 1.55;
    color: var(--clr-text);
    margin: .8rem 0 .65rem;
    transition: color .25s ease;
}
.category-article:hover .category-title{ color: #1a3d4e; }
.category-title a,
.category-title a:hover{ color: inherit; }
.category-summary{
    color: #5d6672;
    font-size: .92rem;
    line-height: 1.8;
    margin-bottom: 1.1rem;
}
.read-more{
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    font-size: .9rem;
    font-weight: 700;
    color: var(--clr-ink);
    border: 0;
    background: transparent;
    padding: 0;
    transition: gap .25s ease, color .25s ease;
}
.read-more i{ font-size: .8rem; transition: transform .25s ease; }
.read-more:hover{
    color: #111827;
    gap: .75rem;
}
.read-more:hover i{ transform: translateX(3px); color: var(--clr-accent); }
@media (min-width: 768px){
    .category-row-inner{
        flex-direction: row;
    }
    .category-cover{
        width: 292px;
        aspect-ratio: auto;
        min-height: 100%;
    }
    .category-content{ padding: 1.6rem 1.75rem 1.5rem; }
}

/* ========== 分页 ========== */
.pagination-wrap{
    margin-top: 2rem;
    display: flex;
    justify-content: center;
}
.pagination.pg-custom{
    --bs-pagination-bg: #fff;
    --bs-pagination-border-color: var(--clr-border);
    --bs-pagination-color: var(--clr-text);
    --bs-pagination-hover-bg: #f3f6e9;
    --bs-pagination-hover-border-color: var(--clr-brand);
    --bs-pagination-hover-color: #111827;
    --bs-pagination-focus-bg: #fff;
    --bs-pagination-focus-border-color: var(--clr-brand);
    --bs-pagination-focus-color: #111827;
    --bs-pagination-active-bg: var(--clr-ink);
    --bs-pagination-active-border-color: var(--clr-ink);
    --bs-pagination-active-color: var(--clr-brand);
    gap: .35rem;
}
.pagination.pg-custom .page-link{
    border-radius: var(--radius-control) !important;
    border: 1px solid var(--clr-border);
    min-width: 48px;
    text-align: center;
    font-weight: 600;
    transition: all .25s ease;
    box-shadow: none;
}
.pagination.pg-custom .page-link:hover{
    background: var(--clr-brand);
    color: var(--clr-ink);
    border-color: var(--clr-brand);
    transform: translateY(-2px);
}
.pagination.pg-custom .page-item.disabled .page-link{
    background: #f0f0ee;
    color: #aab0b8;
    border-color: #e5e3dd;
}

/* ========== 侧边栏 ========== */
@media (min-width: 992px){
    .sidebar-sticky{
        position: sticky;
        top: 106px;
    }
}
.side-widget{
    background: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}
.side-widget .widget-title{
    font-size: 1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: .6rem;
    color: var(--clr-text);
    margin-bottom: 1.15rem;
}
.side-widget .widget-title .icon-box{
    width: 30px;
    height: 30px;
    border-radius: 8px;
    background: #EFF4D8;
    color: #111827;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: .85rem;
}
.category-topic-list{
    display: grid;
    gap: .4rem;
}
.category-topic-list a{
    display: flex;
    align-items: center;
    gap: .7rem;
    color: #444c57;
    font-size: .92rem;
    padding: .55rem .7rem;
    border-radius: 8px;
    transition: background .2s ease, color .2s ease;
}
.category-topic-list a i{
    color: var(--clr-accent);
    font-size: .65rem;
    transition: transform .25s ease;
}
.category-topic-list a:hover{
    background: #F5F2E9;
    color: #111827;
}
.category-topic-list a:hover i{ transform: translateX(3px); }
.topic-count{
    margin-left: auto;
    font-size: .74rem;
    color: var(--clr-muted);
    background: #f0f0ee;
    border-radius: 100px;
    padding: .1rem .55rem;
}
.side-item{
    display: flex;
    align-items: flex-start;
    gap: .85rem;
    padding: .85rem 0;
    border-top: 1px dashed #e9e6df;
}
.side-item:first-of-type{ border-top: 0; padding-top: .15rem; }
.side-item-date{
    font-size: .76rem;
    line-height: 1.7;
    color: #ffffff;
    background: var(--clr-ink);
    border-radius: 6px;
    padding: .25rem .5rem;
    white-space: nowrap;
}
.side-item-link{
    font-size: .9rem;
    line-height: 1.7;
    color: var(--clr-text);
    font-weight: 500;
    transition: color .2s ease;
}
.side-item-link:hover{ color: #6d7d08; }
.recent-side a{
    color: var(--clr-text);
}
.recent-side a:hover{
    color: #8ca600;
}
.side-cta{
    display: block;
    background: var(--clr-ink);
    border-radius: var(--radius-card);
    color: #fff;
    padding: 1.4rem 1.4rem 1.5rem;
    margin-top: 1.5rem;
    background-size: cover;
    background-image: linear-gradient(140deg, rgba(17,24,39,.92), rgba(28,38,53,.9)), url('/assets/images/backpic/back-6.jpg');
    background-position: center;
}
.side-cta .side-cta-title{
    font-weight: 700;
    font-size: 1.05rem;
    margin-bottom: .35rem;
}
.side-cta p{
    color: rgba(255,255,255,.6);
    font-size: .85rem;
    line-height: 1.7;
    margin-bottom: 1rem;
}

/* ========== FAQ 区 ========== */
.faq-section{
    padding: var(--space-section) 0;
    background: #FFFDF7;
    border-top: 1px solid var(--clr-border);
    border-bottom: 1px solid var(--clr-border);
}
.section-center-head{
    text-align: center;
    max-width: 620px;
    margin: 0 auto 2.5rem;
}
.section-center-head h2{
    font-size: var(--fs-h2);
    font-weight: 700;
    color: var(--clr-text);
    margin-top: .8rem;
}
.section-center-head p{
    color: var(--clr-muted);
    margin-top: .8rem;
    font-size: .95rem;
}
.faq-accordion{
    max-width: 780px;
    margin: 0 auto;
}
.accordion.accordion-custom{
    --bs-accordion-border-color: var(--clr-border);
    --bs-accordion-bg: #fff;
    --bs-accordion-border-radius: 12px;
    --bs-accordion-inner-border-radius: 12px;
    --bs-accordion-btn-color: var(--clr-text);
    --bs-accordion-btn-focus-box-shadow: 0 0 0 3px rgba(212,255,63,.25);
}
.accordion.accordion-custom .accordion-item{
    border: 1px solid var(--clr-border);
    margin-bottom: .9rem;
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    overflow: visible;
    position: relative;
    transition: box-shadow .25s ease;
}
.accordion.accordion-custom .accordion-item:has(.accordion-button:not(.collapsed)){
    box-shadow: var(--shadow-hover);
    border-left: 3px solid #B4D936;
}
.accordion.accordion-custom .accordion-button{
    padding: 1.2rem 1.35rem;
    font-weight: 700;
    font-size: 1rem;
    background-color: #fff;
    color: var(--clr-text);
    box-shadow: none;
    border-radius: var(--radius-card);
    gap: .75rem;
}
.accordion.accordion-custom .accordion-button::after{
    order: -1;
    width: 14px;
    height: 14px;
    background-size: contain;
}
.accordion.accordion-custom .accordion-button:not(.collapsed){
    color: #111827;
    background: #FCFEEC;
    border-radius: 12px 12px 0 0;
}
.accordion.accordion-custom .accordion-button:focus{
    box-shadow: 0 0 0 3px rgba(212,255,63,.28);
}
.accordion.accordion-custom .accordion-body{
    color: #5b626d;
    background: #fff;
    font-size: .94rem;
    line-height: 1.9;
    padding: .3rem 1.35rem 1.4rem;
    border-radius: 0 0 12px 12px;
}
.accordion.accordion-custom .qa-mark{
    color: var(--clr-brand);
}

/* ========== CTA 区块 ========== */
.category-cta{
    background:
        linear-gradient(115deg, rgba(17,24,39,.94) 0%, rgba(19,26,39,.9) 55%, rgba(17,24,39,.78) 100%),
        url('/assets/images/backpic/back-5.jpg') center / cover no-repeat;
    padding: var(--space-section) 0;
}
.cta-inner{
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.12);
    border-radius: 18px;
    padding: 2.5rem 2rem;
}
@media (min-width: 992px){
    .cta-inner{ padding: 3rem 3.5rem; }
}
.cta-copy h2{
    color: #fff;
    font-size: 1.75rem;
    font-weight: 700;
    max-width: 34rem;
    line-height: 1.5;
    margin-bottom: .8rem;
}
.cta-copy p{
    color: rgba(255,255,255,.65);
    max-width: 34rem;
    margin: 0;
}
.cta-actions{
    margin-top: 1.6rem;
}
@media (min-width: 992px){
    .cta-actions{ margin-top: 0; }
    .banner-side{ margin-top: 0; }
}

/* ========== 页脚 ========== */
.site-footer{
    background: var(--clr-ink);
    color: rgba(255,255,255,.55);
    font-size: .92rem;
}
.footer-brand{
    color: #fff;
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -.02em;
}
.footer-title{
    color: #fff;
    font-size: .98rem;
    font-weight: 700;
    margin-top: .25rem;
    margin-bottom: .8rem;
}
.footer-list li + li{
    margin-top: .4rem;
}
.footer-list a{
    color: rgba(255,255,255,.58);
    transition: color .25s ease;
    font-size: .9rem;
}
.footer-list a:hover{ color: var(--clr-brand); }
.footer-bottom{
    border-top: 1px solid rgba(255,255,255,.08);
    padding: 1.25rem 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: .5rem 1rem;
}
.footer-bottom .container{
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .5rem 1rem;
    flex-wrap: wrap;
}
.footer-bottom .copyright-name{
    color: #fff;
    font-weight: 600;
}
.footer-bottom .footer-tech{
    color: rgba(255,255,255,.38);
    font-size: .78rem;
}

/* ========== 移动端精细调整 ========== */
@media (max-width: 991.98px){
    .main-navbar .nav-link{
        padding: .9rem 1rem !important;
        justify-content: flex-start;
    }
    .main-navbar .nav-link::after{ display: none; }
    .navbar-cta{ margin-left: 0; margin-top: .5rem; padding-bottom: 1rem; }
}
@media (max-width: 575.98px){
    .category-banner{ padding: 3rem 0 2.5rem; }
    .category-banner .breadcrumb{ margin-bottom: 1.2rem; }
    .category-content{ padding: 1.15rem 1.15rem 1.3rem; }
    .category-title{ font-size: 1.06rem; }
    .category-summary{ font-size: .88rem; }
    .category-cover{ aspect-ratio: 16 / 9; }
    .side-widget{ padding: 1.15rem; }
    .cta-inner{ padding: 1.75rem 1.25rem; }
    .cta-copy h2{ font-size: 1.5rem; }
    .footer-bottom .container{
        flex-direction: column;
        align-items: flex-start;
    }
}
@media (max-width: 380px){
    .category-article .cover-badge{ display: none; }
    .navbar-brand img{ max-width: 32px; }
}

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}