/* roulang page: index */
/* ==================== 设计变量 ==================== */
:root{
  --bg:#F7F6F2;
  --bg-alt:#EFEEE8;
  --card:#FFFFFF;
  --ink-900:#0B0C12;
  --ink-700:#1A1D26;
  --text:#14161B;
  --text-muted:#5C6270;
  --text-soft:#8A8F9B;
  --primary:#0E9F8E;
  --primary-600:#0B8577;
  --primary-soft:rgba(14,159,142,.10);
  --secondary:#241E44;
  --accent:#FF6A3D;
  --line:rgba(20,22,27,.10);
  --line-strong:rgba(20,22,27,.18);
  --line-dark:rgba(255,255,255,.14);
  --star:rgba(255,255,255,.72);
  --r-lg:14px;
  --r-md:10px;
  --r-sm:6px;
  --sh-1:0 6px 18px rgba(11,12,18,.06);
  --sh-2:0 14px 28px rgba(11,12,18,.14);
  --ease:cubic-bezier(.2,.7,.2,1);
  --font-cn:"Noto Sans SC","PingFang SC","Microsoft YaHei",-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

/* ==================== 基础 reset ==================== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;padding:0;background:var(--bg);color:var(--text);
  font-family:var(--font-cn);font-size:16px;line-height:1.8;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
h1,h2,h3,h4,p,ul,ol,li,figure,blockquote{margin:0;padding:0;}
ul,ol{list-style:none;}
img{max-width:100%;display:block;height:auto;border:0;}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease);}
button,input,textarea,select{font-family:inherit;font-size:100%;margin:0;}
button{cursor:pointer;border:0;background:none;}
::selection{background:var(--primary);color:#fff;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:3px;}

/* ==================== 布局容器 ==================== */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
.container-wide{max-width:1320px;}
@media (min-width:640px){.container{padding:0 32px;}}
@media (min-width:1024px){.container{padding:0 48px;}}

.section{padding:56px 0;position:relative;}
@media (min-width:768px){.section{padding:80px 0;}}
@media (min-width:1024px){.section{padding:100px 0;}}
.section-alt{background:var(--bg-alt);}
.section-dark{background:var(--ink-900);color:#fff;}
.section-dark .section-title,
.section-dark h2,
.section-dark h3{color:#fff;}

/* ==================== 标题层级 ==================== */
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:36px;}
.section-title{
  font-size:clamp(22px,2.5vw,34px);font-weight:800;letter-spacing:-.02em;line-height:1.25;
  position:relative;padding-bottom:14px;
}
.section-title::after{
  content:"";position:absolute;left:0;bottom:0;height:3px;width:0;
  background:var(--primary);transition:width .7s var(--ease);
}
.section-title.is-visible::after{width:64px;}
.section-sub{color:var(--text-muted);font-size:15px;margin-top:10px;max-width:660px;}
.section-dark .section-sub{color:rgba(255,255,255,.68);}
.section-link{
  font-size:15px;font-weight:600;color:var(--primary);display:inline-flex;align-items:center;gap:6px;
  border-bottom:1px solid transparent;padding-bottom:2px;
}
.section-link:hover{color:var(--primary-600);border-bottom-color:var(--primary-600);}
.section-link .arrow{transition:transform .25s var(--ease);}
.section-link:hover .arrow{transform:translateX(4px);}

/* ==================== 按钮 ==================== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-md);
  font-size:15px;font-weight:600;letter-spacing:.01em;border:1px solid transparent;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .15s var(--ease),box-shadow .22s var(--ease);
  white-space:nowrap;
}
.btn .arrow{transition:transform .25s var(--ease);}
.btn:hover .arrow{transform:translateX(4px);}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 16px rgba(14,159,142,.24);}
.btn-primary:hover{background:var(--primary-600);box-shadow:0 10px 22px rgba(14,159,142,.30);}
.btn-outline{border-color:var(--line-strong);color:var(--text);background:transparent;}
.btn-outline:hover{border-color:var(--text);background:#fff;}
.btn-light{background:#fff;color:var(--ink-900);}
.btn-light:hover{background:rgba(255,255,255,.86);}
.btn-sm{height:40px;padding:0 16px;font-size:14px;}

/* ==================== 徽章 / 标签 ==================== */
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 9px;border-radius:var(--r-sm);
  font-size:12px;font-weight:600;letter-spacing:.02em;
  background:var(--primary-soft);color:var(--primary-600);
}
.tag-dark{background:rgba(36,30,68,.9);color:#fff;}
.tag-accent{background:var(--accent);color:#fff;}

/* ==================== 顶部导航 ==================== */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,246,242,.96);
  border-bottom:1px solid transparent;
  transition:background .22s var(--ease),border-color .22s var(--ease);
}
.site-header.is-stuck{background:#F7F6F2;border-bottom-color:var(--line);box-shadow:0 1px 0 rgba(20,22,27,.02);}
.header-inner{display:flex;align-items:center;gap:22px;height:72px;transition:height .22s var(--ease);}
.site-header.is-stuck .header-inner{height:60px;}

.brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:800;letter-spacing:-.02em;white-space:nowrap;}
.brand-icon{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;color:var(--primary);flex:0 0 auto;}
.brand-icon svg{width:26px;height:26px;display:block;}
.brand-text{line-height:1;}

.main-nav{display:none;align-items:center;gap:26px;margin-left:10px;}
@media (min-width:1024px){.main-nav{display:flex;}}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--text-muted);padding:6px 0;
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--primary);
  transform:scaleX(0);transform-origin:left;transition:transform .25s var(--ease);
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--text);font-weight:700;}
.nav-link.is-active::after{transform:scaleX(1);}

.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto;}
.nav-search{display:none;}
@media (min-width:1024px){.nav-search{display:block;}}
.nav-search input{
  width:220px;height:40px;padding:0 14px;border-radius:var(--r-md);
  border:1px solid var(--line);background:#fff;color:var(--text);font-size:14px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-search input::placeholder{color:var(--text-soft);}
.nav-search input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft);outline:none;}

.header-actions .btn-ghost-link{
  display:none;font-size:15px;font-weight:500;color:var(--text);padding:6px 2px;
  border-bottom:1px solid transparent;
}
@media (min-width:1024px){.header-actions .btn-ghost-link{display:inline-block;}}
.header-actions .btn-ghost-link:hover{color:var(--primary);border-bottom-color:var(--primary);}

.nav-toggle{
  display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
  width:42px;height:42px;border-radius:var(--r-md);border:1px solid var(--line);
  background:#fff;align-items:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform .25s var(--ease),opacity .2s var(--ease);}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
@media (min-width:1024px){.nav-toggle{display:none;}}
.header-actions .btn-enter{display:none;}
@media (min-width:1024px){.header-actions .btn-enter{display:inline-flex;}}

/* 移动端抽屉 */
.mobile-drawer{
  position:fixed;left:0;right:0;top:72px;bottom:0;z-index:55;
  background:var(--bg);padding:22px 20px 40px;overflow-y:auto;
  transform:translateY(-12px);opacity:0;visibility:hidden;
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s;
  border-top:1px solid var(--line);
}
.mobile-drawer.is-open{transform:translateY(0);opacity:1;visibility:visible;}
@media (min-width:1024px){.mobile-drawer{display:none;}}
.drawer-search input{
  width:100%;height:46px;padding:0 16px;border-radius:var(--r-md);
  border:1px solid var(--line);background:#fff;font-size:15px;
}
.drawer-search input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft);outline:none;}
.drawer-nav{display:flex;flex-direction:column;margin-top:20px;border-top:1px solid var(--line);}
.drawer-nav a{
  padding:16px 2px;font-size:16px;font-weight:600;color:var(--text);
  border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;
}
.drawer-nav a.is-active{color:var(--primary);}
.drawer-nav a .arrow{color:var(--text-soft);}
.drawer-actions{display:flex;flex-direction:column;gap:12px;margin-top:24px;}
.drawer-actions .btn{width:100%;}

/* ==================== 首屏 Hero ==================== */
.hero{position:relative;overflow:hidden;background:var(--ink-900);}
.hero-media{position:absolute;inset:0;z-index:1;}
.hero-media img{width:100%;height:100%;object-fit:cover;object-position:center;}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(102deg,rgba(11,12,18,.92) 0%,rgba(11,12,18,.80) 42%,rgba(11,12,18,.52) 100%);
}
.hero-inner{position:relative;z-index:2;padding:72px 0 56px;}
@media (min-width:768px){.hero-inner{padding:92px 0 76px;}}
@media (min-width:1024px){.hero-inner{padding:118px 0 104px;min-height:600px;display:flex;align-items:center;}}
.hero-copy{max-width:720px;}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:28px;padding:0 12px;border-radius:var(--r-sm);
  background:rgba(255,255,255,.10);border:1px solid var(--line-dark);color:var(--star);
  font-size:13px;font-weight:600;letter-spacing:.04em;margin-bottom:22px;
}
.hero-eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--primary);display:inline-block;font-style:normal;}
.hero-title{
  color:#fff;font-size:clamp(28px,4.4vw,60px);font-weight:900;letter-spacing:-.02em;line-height:1.16;
  margin-bottom:18px;max-width:15em;
  animation:fadeUp .42s var(--ease) both;
}
.hero-sub{
  color:rgba(255,255,255,.80);font-size:clamp(15px,1.5vw,18px);line-height:1.8;max-width:34em;
  margin-bottom:32px;animation:fadeUp .42s var(--ease) .06s both;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;animation:fadeUp .42s var(--ease) .12s both;}
.hero-trust{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:38px;
  color:rgba(255,255,255,.66);font-size:14px;animation:fadeUp .42s var(--ease) .18s both;
}
.hero-trust span{display:inline-flex;align-items:center;}
.hero-trust .sep{width:1px;height:14px;background:var(--line-dark);display:inline-block;}
@keyframes fadeUp{from{opacity:0;transform:translateY(12px);}to{opacity:1;transform:none;}}

/* ==================== 数据条 ==================== */
.metrics{display:grid;gap:22px;grid-template-columns:1fr;}
@media (min-width:768px){.metrics{grid-template-columns:repeat(3,1fr);gap:24px;}}
.metric{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px 24px;box-shadow:var(--sh-1);transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.metric:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.metric-num{
  font-family:var(--font-mono);font-size:34px;font-weight:700;letter-spacing:-.03em;
  color:var(--secondary);line-height:1.1;display:block;margin-bottom:8px;
}
.metric-num small{font-size:15px;font-weight:600;color:var(--text-muted);margin-left:4px;letter-spacing:0;}
.metric h3{font-size:16px;font-weight:700;margin-bottom:8px;}
.metric p{font-size:14.5px;color:var(--text-muted);line-height:1.78;}

/* ==================== 三步上手 ==================== */
.steps{display:grid;gap:22px;grid-template-columns:1fr;}
@media (min-width:768px){.steps{grid-template-columns:repeat(3,1fr);}}
@media (min-width:1024px){.steps{grid-template-columns:1.38fr 1fr 1fr;gap:24px;}}
.step{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px 24px 28px;box-shadow:var(--sh-1);position:relative;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.step-num{
  display:block;font-family:var(--font-mono);font-weight:700;line-height:1;
  font-size:clamp(46px,6vw,78px);letter-spacing:-.05em;margin-bottom:14px;
  color:rgba(14,159,142,.14);-webkit-text-stroke:1px rgba(14,159,142,.55);
}
.step h3{font-size:18px;font-weight:700;margin-bottom:10px;}
.step p{font-size:15px;color:var(--text-muted);line-height:1.8;}
.step-note{
  display:inline-block;margin-top:16px;font-family:var(--font-mono);font-size:12px;
  color:var(--primary-600);letter-spacing:.06em;
}

/* ==================== 覆盖范围 ==================== */
.cover-grid{display:grid;gap:22px;grid-template-columns:1fr;}
@media (min-width:768px){.cover-grid{grid-template-columns:repeat(2,1fr);gap:24px;}}
.cover-card{
  display:grid;grid-template-columns:1fr;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
@media (min-width:520px) and (max-width:767px){.cover-card{grid-template-columns:150px 1fr;}}
.cover-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.cover-thumb{overflow:hidden;background:var(--bg-alt);aspect-ratio:16/10;}
.cover-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .7s var(--ease);}
.cover-card:hover .cover-thumb img{transform:scale(1.04);}
.cover-body{padding:22px 22px 24px;}
.cover-body h3{font-size:17px;font-weight:700;margin-bottom:8px;}
.cover-body p{font-size:14.5px;color:var(--text-muted);line-height:1.78;}

/* ==================== 使用反馈 ==================== */
.case-row{margin-top:0;}
.case-major{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--sh-1);display:flex;flex-direction:column;height:100%;margin-bottom:22px;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
@media (min-width:1024px){.case-major{margin-bottom:0;}}
.case-major:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.case-major-thumb{overflow:hidden;aspect-ratio:16/9;background:var(--bg-alt);}
.case-major-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .7s var(--ease);}
.case-major:hover .case-major-thumb img{transform:scale(1.04);}
.case-major-body{padding:24px 24px 26px;}
.case-major-body h3{font-size:19px;font-weight:700;margin:14px 0 10px;line-height:1.45;}
.case-major-body p{font-size:15px;color:var(--text-muted);line-height:1.82;}
.case-figure{
  font-family:var(--font-mono);font-size:26px;font-weight:700;color:var(--secondary);
  letter-spacing:-.03em;display:block;margin-top:16px;
}
.case-figure small{font-size:13px;color:var(--text-muted);font-family:var(--font-cn);font-weight:500;margin-left:6px;letter-spacing:0;}
.case-minor{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:22px 22px 24px;box-shadow:var(--sh-1);margin-bottom:22px;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.case-minor:last-child{margin-bottom:0;}
.case-minor:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.case-minor h3{font-size:16px;font-weight:700;margin:12px 0 8px;}
.case-minor p{font-size:14.5px;color:var(--text-muted);line-height:1.78;}

/* ==================== FAQ ==================== */
.faq-wrap{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:6px 26px;box-shadow:var(--sh-1);}
@media (min-width:768px){.faq-wrap{padding:6px 34px;}}
.faq-list{margin:0;background:transparent;border:0;}
.faq-item{border-bottom:1px solid var(--line);background:transparent;}
.faq-item:last-child{border-bottom:0;}
.faq-list .accordion-title::before,
.faq-list .accordion-title::after{display:none !important;content:none !important;}
.faq-q{
  position:relative;display:flex;align-items:center;
  padding:22px 42px 22px 20px;font-size:16px;font-weight:600;color:var(--text);
  background:transparent;border:0;line-height:1.6;transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--primary-600);}
.faq-q::after{
  content:"";position:absolute;right:6px;top:50%;width:9px;height:9px;
  border-right:2px solid var(--text-soft);border-bottom:2px solid var(--text-soft);
  transform:translateY(-70%) rotate(45deg);
  transition:transform .25s var(--ease);
}
.faq-item.is-active > .faq-q::after{transform:translateY(-30%) rotate(-135deg);border-color:var(--primary);}
.faq-q .bar{
  position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:18px;border-radius:2px;background:var(--primary);
}
.faq-a{
  padding:0 42px 24px 20px;font-size:15px;line-height:1.85;color:var(--text-muted);
  border:0;background:transparent;
}
.faq-a p{margin:0;}

/* ==================== 开启区块 ==================== */
.cta-band{
  position:relative;overflow:hidden;background:var(--ink-900);color:#fff;
  padding:64px 0;
}
@media (min-width:1024px){.cta-band{padding:88px 0;}}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:24px 24px;pointer-events:none;
}
.cta-inner{position:relative;z-index:2;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;}
.cta-copy{max-width:620px;}
.cta-copy h2{font-size:clamp(22px,2.6vw,34px);font-weight:800;letter-spacing:-.02em;line-height:1.25;margin-bottom:12px;}
.cta-copy p{color:rgba(255,255,255,.72);font-size:15.5px;line-height:1.8;}
.cta-aside{display:flex;flex-direction:column;gap:12px;align-items:flex-start;}
.cta-aside .hint{font-size:13.5px;color:rgba(255,255,255,.56);}

/* ==================== 最新信息 ==================== */
.news-grid{display:grid;gap:22px;grid-template-columns:1fr;}
@media (min-width:640px){.news-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.news-grid{grid-template-columns:repeat(3,1fr);gap:24px;}}
.news-card{
  display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-1);height:100%;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.news-thumb{display:block;aspect-ratio:16/10;overflow:hidden;background:var(--bg-alt);}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .7s var(--ease);}
.news-card:hover .news-thumb img{transform:scale(1.04);}
.news-body{display:flex;flex-direction:column;padding:20px 22px 22px;flex:1;}
.news-tag{
  align-self:flex-start;display:inline-flex;align-items:center;height:24px;padding:0 9px;
  border-radius:var(--r-sm);background:var(--primary-soft);color:var(--primary-600);
  font-size:12px;font-weight:600;margin-bottom:12px;
}
.news-title{
  font-size:16.5px;font-weight:700;line-height:1.55;margin-bottom:10px;color:var(--text);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-excerpt{
  font-size:14px;color:var(--text-muted);line-height:1.75;margin-bottom:16px;flex:1;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-date{font-family:var(--font-mono);font-size:12.5px;color:var(--text-soft);letter-spacing:.02em;}
.news-empty{
  grid-column:1 / -1;background:var(--card);border:1px dashed var(--line-strong);
  border-radius:var(--r-lg);padding:44px 26px;text-align:center;color:var(--text-muted);font-size:15px;
}
.news-empty a{color:var(--primary);font-weight:600;border-bottom:1px solid var(--primary);}

/* ==================== 页脚 ==================== */
.site-footer{position:relative;background:var(--ink-900);color:rgba(255,255,255,.74);overflow:hidden;}
.site-footer::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.055) 1px,transparent 1px);
  background-size:26px 26px;pointer-events:none;
}
.footer-main{position:relative;z-index:2;padding:60px 0 40px;}
@media (min-width:1024px){.footer-main{padding:76px 0 48px;}}
.footer-grid{display:grid;gap:36px;grid-template-columns:1fr;}
@media (min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;}}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:800;color:#fff;letter-spacing:-.02em;margin-bottom:16px;}
.footer-brand .brand-icon{color:var(--primary);}
.footer-desc{font-size:14.5px;line-height:1.8;color:rgba(255,255,255,.62);max-width:30em;}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;letter-spacing:.04em;margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{font-size:14.5px;color:rgba(255,255,255,.66);display:inline-block;position:relative;}
.footer-col a::after{
  content:"";position:absolute;left:0;bottom:-2px;width:0;height:1px;background:var(--primary);
  transition:width .25s var(--ease);
}
.footer-col a:hover{color:#fff;}
.footer-col a:hover::after{width:100%;}
.footer-bottom{
  position:relative;z-index:2;border-top:1px solid var(--line-dark);
  padding:22px 0 28px;display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  font-size:13.5px;color:rgba(255,255,255,.50);
}
.footer-bottom .dot{width:4px;height:4px;border-radius:50%;background:var(--primary);display:inline-block;margin:0 8px;vertical-align:middle;}

/* ==================== 动效降级 ==================== */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;animation-iteration-count:1 !important;
    transition-duration:.001ms !important;scroll-behavior:auto !important;
  }
  .hero-title,.hero-sub,.hero-cta,.hero-trust{opacity:1 !important;transform:none !important;}
}

/* ==================== 小屏微调 ==================== */
@media (max-width:519px){
  .hero-trust{gap:10px;font-size:13px;}
  .btn{width:100%;}
  .hero-cta .btn{width:100%;}
  .cta-aside{width:100%;}
  .cta-aside .btn{width:100%;}
  .faq-wrap{padding:4px 18px;}
  .faq-q{padding:18px 38px 18px 16px;font-size:15.5px;}
  .faq-a{padding:0 38px 20px 16px;}
}

/* roulang page: article */
:root{
  --bg:#F7F6F2;
  --bg-alt:#EFEEE8;
  --ink-900:#0B0C12;
  --ink-700:#1A1D26;
  --text:#14161B;
  --text-muted:#5C6270;
  --primary:#0E9F8E;
  --primary-600:#0B8577;
  --secondary:#241E44;
  --accent:#FF6A3D;
  --line:rgba(20,22,27,.10);
  --line-dark:rgba(255,255,255,.14);
  --star:rgba(255,255,255,.72);
  --radius-card:14px;
  --radius-img:12px;
  --radius-btn:10px;
  --shadow-1:0 6px 18px rgba(11,12,18,.06);
  --shadow-2:0 14px 28px rgba(11,12,18,.14);
  --container:1200px;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --font-mono:"Space Grotesk","JetBrains Mono",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-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
p{margin:0 0 1.1em}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5,h6{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.15;color:var(--text)}
button{font-family:inherit}
input,textarea{font-family:inherit}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
::selection{background:var(--primary);color:#fff}

/* ---------- 容器 ---------- */
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
.container-wide{max-width:1320px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 22px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:700;
  letter-spacing:-.01em;
  border:1px solid transparent;
  cursor:pointer;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .15s ease,box-shadow .2s ease;
  white-space:nowrap;
}
.btn .arrow{transition:transform .25s cubic-bezier(.2,.7,.2,1);display:inline-block}
.btn:hover .arrow{transform:translateX(4px)}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-600);color:#fff;box-shadow:0 10px 22px rgba(14,159,142,.24)}
.btn-outline{background:transparent;color:var(--text);border-color:rgba(20,22,27,.24)}
.btn-outline:hover{border-color:var(--text);background:rgba(20,22,27,.04)}
.btn-ghost{background:transparent;color:var(--text);border-color:transparent;padding:0 12px}
.btn-ghost:hover{color:var(--primary)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn-block{width:100%}
.btn-on-dark{background:#fff;color:var(--ink-900)}
.btn-on-dark:hover{background:var(--star);color:var(--ink-900)}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(247,246,242,.96);
  border-bottom:1px solid transparent;
  transition:height .2s ease,background-color .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.site-header.is-stuck{
  background:var(--bg);
  border-bottom:1px solid var(--line);
  box-shadow:0 4px 18px rgba(11,12,18,.05);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:24px;
  height:72px;
  transition:height .2s ease;
}
.site-header.is-stuck .header-inner{height:60px}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  font-weight:900;
  letter-spacing:-.02em;
  color:var(--ink-900);
  flex-shrink:0;
}
.brand-icon{
  width:30px;height:30px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:9px;
  background:var(--secondary);
  color:var(--primary);
  flex-shrink:0;
}
.brand-icon svg{width:20px;height:20px;display:block}
.main-nav{display:none;align-items:center;gap:6px;margin-left:8px}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  font-size:15px;
  font-weight:500;
  color:var(--text-muted);
  transition:color .2s ease;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;
  background:var(--primary);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .28s cubic-bezier(.2,.7,.2,1);
}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--text);font-weight:700}
.nav-link.is-active::after{transform:scaleX(1)}
.header-actions{display:none;align-items:center;gap:10px;margin-left:auto}
.nav-search{
  position:relative;
  width:220px;
}
.nav-search input{
  width:100%;
  height:40px;
  padding:0 14px;
  font-size:14px;
  color:var(--text);
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.nav-search input::placeholder{color:#9aa0ab}
.nav-search input:focus{
  outline:none;
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(14,159,142,.14);
}
.nav-toggle{
  margin-left:auto;
  width:44px;height:44px;
  display:inline-flex;align-items:center;justify-content:center;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  cursor:pointer;
  color:var(--ink-900);
}
.nav-toggle span{
  position:relative;
  display:block;width:18px;height:2px;background:currentColor;border-radius:2px;
}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;border-radius:2px;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.mobile-drawer{
  display:none;
  border-top:1px solid var(--line);
  background:var(--bg);
  padding:18px 0 26px;
}
.mobile-drawer.is-open{display:block}
.drawer-search{margin-bottom:14px}
.drawer-search input{
  width:100%;height:46px;padding:0 14px;font-size:15px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-btn);
}
.drawer-nav{display:flex;flex-direction:column;margin-bottom:18px}
.drawer-nav a{
  padding:14px 2px;
  font-size:16px;
  font-weight:600;
  color:var(--text);
  border-bottom:1px solid var(--line);
}
.drawer-nav a.is-active{color:var(--primary)}
.drawer-actions{display:flex;flex-direction:column;gap:10px}

/* ---------- 深色区星点 ---------- */
.starfield{
  background-color:var(--ink-900);
  background-image:
    radial-gradient(rgba(255,255,255,.055) 1px, transparent 1px),
    radial-gradient(rgba(255,255,255,.04) 1px, transparent 1px);
  background-size:26px 26px, 46px 46px;
  background-position:0 0, 13px 15px;
  color:#fff;
}

/* ---------- 面包屑 ---------- */
.breadcrumb-bar{
  background:var(--bg-alt);
  border-bottom:1px solid var(--line);
}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  height:52px;
  font-size:14px;
  color:var(--text-muted);
  white-space:nowrap;
  overflow:hidden;
}
.breadcrumb a{color:var(--text-muted);transition:color .2s ease}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:rgba(20,22,27,.28)}
.breadcrumb .current{
  color:var(--text);
  font-weight:600;
  overflow:hidden;
  text-overflow:ellipsis;
  max-width:46ch;
}

/* ---------- 文章头 ---------- */
.article-hero{
  position:relative;
  padding:56px 0 52px;
  overflow:hidden;
}
.article-hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  opacity:.20;
  mix-blend-mode:screen;
}
.article-hero .container{position:relative;z-index:2}
.article-hero-inner{max-width:860px}
.article-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 12px;
  border-radius:6px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.02em;
  background:var(--primary);
  color:#fff;
  margin-bottom:18px;
}
.article-badge.is-accent{background:var(--accent)}
.article-title{
  font-size:clamp(28px,5vw,50px);
  font-weight:900;
  line-height:1.16;
  color:#fff;
  letter-spacing:-.02em;
  margin-bottom:20px;
}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 18px;
  padding-top:18px;
  border-top:1px solid var(--line-dark);
  font-family:var(--font-mono);
  font-size:13px;
  color:rgba(255,255,255,.66);
}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:7px}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--primary);display:inline-block}

/* ---------- 主布局 ---------- */
.main-area{padding:56px 0 72px}
.grid-gap{row-gap:48px}
@media screen and (min-width:1024px){
  .grid-gap{row-gap:0}
}

/* ---------- 正文 ---------- */
.article-content{
  max-width:760px;
  font-size:17px;
  line-height:1.85;
  color:var(--text);
  overflow-wrap:break-word;
  word-break:break-word;
}
.article-content p{margin:0 0 1.15em}
.article-content h2{
  font-size:clamp(21px,2.4vw,26px);
  font-weight:800;
  margin:40px 0 16px;
  padding-left:14px;
  border-left:3px solid var(--primary);
  line-height:1.3;
}
.article-content h3{
  font-size:19px;
  font-weight:800;
  margin:32px 0 12px;
  color:var(--ink-700);
}
.article-content h4{font-size:17px;font-weight:800;margin:24px 0 10px}
.article-content ul,.article-content ol{margin:0 0 1.3em;padding-left:4px}
.article-content ul li,.article-content ol li{
  position:relative;
  padding-left:22px;
  margin-bottom:10px;
  line-height:1.8;
}
.article-content ul li::before{
  content:"";
  position:absolute;
  left:2px;top:.72em;
  width:7px;height:7px;
  border-radius:2px;
  background:var(--primary);
  transform:rotate(45deg);
}
.article-content ol{counter-reset:item}
.article-content ol li{counter-increment:item}
.article-content ol li::before{
  content:counter(item,decimal-leading-zero);
  position:absolute;
  left:0;top:0;
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:700;
  color:var(--primary);
}
.article-content blockquote{
  margin:24px 0;
  padding:18px 22px;
  background:var(--bg-alt);
  border-left:3px solid var(--primary);
  border-radius:0 var(--radius-img) var(--radius-img) 0;
  color:var(--ink-700);
}
.article-content blockquote p:last-child{margin-bottom:0}
.article-content img{
  border-radius:var(--radius-img);
  margin:24px auto;
  box-shadow:var(--shadow-1);
}
.article-content figure{margin:24px 0}
.article-content figcaption{
  text-align:center;
  font-size:13px;
  color:var(--text-muted);
  margin-top:10px;
}
.article-content table{
  width:100%;
  border-collapse:collapse;
  margin:24px 0;
  font-size:15px;
  border:1px solid var(--line);
  border-radius:var(--radius-img);
  overflow:hidden;
}
.article-content thead th{
  background:var(--bg-alt);
  font-weight:700;
  text-align:left;
}
.article-content th,.article-content td{
  padding:12px 16px;
  border-bottom:1px solid var(--line);
  line-height:1.7;
}
.article-content tbody tr:last-child td{border-bottom:none}
.article-content a{
  color:var(--primary);
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-thickness:1px;
  transition:color .2s ease;
}
.article-content a:hover{color:var(--primary-600)}
.article-content code{
  font-family:var(--font-mono);
  font-size:.92em;
  background:var(--bg-alt);
  padding:2px 6px;
  border-radius:6px;
  color:var(--secondary);
}
.article-content hr{
  border:none;
  border-top:1px solid var(--line);
  margin:36px 0;
}

/* 空态 */
.empty-state{
  padding:40px 28px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  text-align:center;
  box-shadow:var(--shadow-1);
}
.empty-state h3{font-size:20px;margin-bottom:10px}
.empty-state p{color:var(--text-muted);font-size:15px;margin-bottom:20px}

/* ---------- 侧栏 ---------- */
.side-block{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:24px;
  box-shadow:var(--shadow-1);
  margin-bottom:22px;
}
.side-title{
  font-size:15px;
  font-weight:800;
  letter-spacing:.02em;
  padding-bottom:12px;
  margin-bottom:14px;
  border-bottom:1px solid var(--line);
}
.side-list li{border-bottom:1px solid var(--line)}
.side-list li:last-child{border-bottom:none}
.side-list a{
  display:block;
  padding:12px 0;
  font-size:14.5px;
  font-weight:600;
  color:var(--text);
  line-height:1.6;
  transition:color .2s ease,transform .2s ease;
}
.side-list a:hover{color:var(--primary);transform:translateX(3px)}
.side-list .side-date{
  display:block;
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--text-muted);
  margin-top:4px;
}
.side-cta{
  background:var(--secondary);
  color:#fff;
  border-radius:var(--radius-card);
  padding:26px 24px;
  position:relative;
  overflow:hidden;
}
.side-cta::after{
  content:"";
  position:absolute;
  right:-40px;top:-40px;
  width:140px;height:140px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(14,159,142,.42),transparent 68%);
}
.side-cta h3{color:#fff;font-size:18px;margin-bottom:10px;position:relative;z-index:2}
.side-cta p{color:rgba(255,255,255,.72);font-size:14px;line-height:1.75;margin-bottom:18px;position:relative;z-index:2}
.side-cta .btn{position:relative;z-index:2}

/* ---------- 板块通用 ---------- */
.section{padding:72px 0}
.section-alt{background:var(--bg-alt)}
.section-head{margin-bottom:38px}
.section-label{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--primary);
  text-transform:uppercase;
  margin-bottom:12px;
}
.section-label::before{content:"";width:22px;height:2px;background:var(--primary);display:inline-block}
.section-title{
  font-size:clamp(23px,3vw,34px);
  font-weight:900;
  position:relative;
  display:inline-block;
  padding-bottom:14px;
}
.section-title::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:48px;height:3px;
  background:var(--primary);
  border-radius:2px;
  transition:width .5s cubic-bezier(.2,.7,.2,1);
}
.section-title:hover::after{width:100%}
.section-sub{color:var(--text-muted);font-size:15.5px;max-width:660px;margin-top:14px}

/* ---------- 相关推荐 ---------- */
.related-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  margin-bottom:22px;
}
.related-head h2{font-size:22px}
.related-head a{font-size:14px;font-weight:700;color:var(--primary)}
.related-head a:hover{color:var(--primary-600)}
.related-card{
  display:flex;
  gap:18px;
  align-items:center;
  padding:18px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  transition:transform .3s cubic-bezier(.2,.7,.2,1),box-shadow .3s ease,border-color .3s ease;
  height:100%;
}
.related-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(14,159,142,.35)}
.related-thumb{
  width:96px;
  flex-shrink:0;
  aspect-ratio:4/3;
  border-radius:var(--radius-img);
  overflow:hidden;
  background:var(--bg-alt);
}
.related-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .7s cubic-bezier(.2,.7,.2,1)}
.related-card:hover .related-thumb img{transform:scale(1.06)}
.related-body{min-width:0}
.related-body h3{
  font-size:16px;
  font-weight:700;
  line-height:1.5;
  margin-bottom:8px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.related-body .related-date{
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--text-muted);
}

/* ---------- FAQ ---------- */
.faq-wrap{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:8px 26px;
  box-shadow:var(--shadow-1);
}
.faq-wrap .accordion{background:transparent;margin:0;border:none}
.faq-wrap .accordion-item{border:none;background:transparent}
.faq-wrap .accordion-title{
  position:relative;
  display:block;
  padding:22px 40px 22px 0;
  border:none;
  border-bottom:1px solid var(--line);
  font-size:16px;
  font-weight:700;
  color:var(--text);
  background:transparent;
  transition:color .2s ease;
}
.faq-wrap .accordion-title:hover{color:var(--primary)}
.faq-wrap .accordion-title::before{
  content:"";
  position:absolute;
  right:8px;
  top:50%;
  width:8px;height:8px;
  margin:0;
  border-right:2px solid var(--primary);
  border-bottom:2px solid var(--primary);
  transform:translateY(-70%) rotate(45deg);
  transition:transform .25s ease;
  background:none;
  display:block;
  left:auto;
}
.faq-wrap .accordion-item.is-active .accordion-title::before{transform:translateY(-30%) rotate(-135deg)}
.faq-wrap .accordion-item.is-active .accordion-title{color:var(--primary)}
.faq-wrap .accordion-content{
  padding:16px 40px 22px 0;
  border-bottom:1px solid var(--line);
  color:var(--text-muted);
  font-size:15px;
  line-height:1.85;
  background:transparent;
}
.faq-wrap .accordion-content p:last-child{margin-bottom:0}
.faq-wrap .accordion-item:last-child .accordion-title,
.faq-wrap .accordion-item:last-child .accordion-content{border-bottom:none}

/* ---------- CTA ---------- */
.cta-section{padding:0 0 84px}
.cta-box{
  position:relative;
  border-radius:18px;
  padding:56px 32px;
  overflow:hidden;
  text-align:center;
}
.cta-box::after{
  content:"";
  position:absolute;
  left:50%;top:-80px;
  width:420px;height:240px;
  transform:translateX(-50%);
  background:radial-gradient(ellipse at center,rgba(14,159,142,.34),transparent 70%);
  pointer-events:none;
}
.cta-box h2{
  position:relative;
  z-index:2;
  color:#fff;
  font-size:clamp(23px,3vw,34px);
  margin-bottom:14px;
}
.cta-box p{
  position:relative;
  z-index:2;
  color:rgba(255,255,255,.74);
  font-size:15.5px;
  max-width:600px;
  margin:0 auto 28px;
}
.cta-actions{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
.cta-note{
  position:relative;
  z-index:2;
  margin-top:22px;
  font-family:var(--font-mono);
  font-size:12.5px;
  color:rgba(255,255,255,.52);
}

/* ---------- 页脚 ---------- */
.site-footer{
  background-color:var(--ink-900);
  background-image:
    radial-gradient(rgba(255,255,255,.055) 1px, transparent 1px),
    radial-gradient(rgba(255,255,255,.035) 1px, transparent 1px);
  background-size:26px 26px, 48px 48px;
  background-position:0 0, 13px 15px;
  color:rgba(255,255,255,.72);
  padding:64px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:40px;
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  font-weight:900;
  color:#fff;
  letter-spacing:-.02em;
  margin-bottom:14px;
}
.footer-brand .brand-icon{background:rgba(255,255,255,.08);color:var(--primary)}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);max-width:280px;margin:0}
.footer-col h4{
  font-size:14px;
  font-weight:800;
  color:#fff;
  letter-spacing:.02em;
  margin-bottom:16px;
}
.footer-col ul li{margin-bottom:11px}
.footer-col ul li a{
  font-size:14px;
  color:rgba(255,255,255,.66);
  transition:color .2s ease,padding-left .2s ease;
}
.footer-col ul li a:hover{color:var(--primary);padding-left:4px}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:10px 20px;
  align-items:center;
  justify-content:space-between;
  padding:22px 0 26px;
  margin-top:48px;
  border-top:1px solid var(--line-dark);
  font-family:var(--font-mono);
  font-size:12.5px;
  color:rgba(255,255,255,.5);
}
.footer-bottom .dot{
  display:inline-block;
  width:4px;height:4px;
  border-radius:50%;
  background:var(--primary);
  margin:0 8px;
  vertical-align:middle;
}

/* ---------- 入场动画 ---------- */
.fade-up{opacity:0;transform:translateY(12px);animation:fadeUp .42s cubic-bezier(.2,.7,.2,1) forwards}
.fade-up.d1{animation-delay:.06s}
.fade-up.d2{animation-delay:.12s}
.fade-up.d3{animation-delay:.18s}
@keyframes fadeUp{to{opacity:1;transform:translateY(0)}}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .fade-up{opacity:1;transform:none}
}

/* ---------- 响应式 ---------- */
@media screen and (min-width:640px){
  .container{padding-left:32px;padding-right:32px}
  .header-inner{height:76px}
  .article-hero{padding:72px 0 64px}
  .section{padding:88px 0}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:40px 32px}
  .cta-box{padding:64px 48px}
  .faq-wrap{padding:8px 34px}
}
@media screen and (min-width:1024px){
  .container{padding-left:48px;padding-right:48px}
  .main-nav{display:flex}
  .header-actions{display:flex}
  .nav-toggle{display:none}
  .mobile-drawer{display:none !important}
  .article-hero{padding:88px 0 76px}
  .main-area{padding:72px 0 96px}
  .section{padding:104px 0}
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr}
  .cta-section{padding:0 0 104px}
}
@media screen and (max-width:1023px){
  .mobile-drawer.is-open{display:block}
}
@media screen and (max-width:519px){
  .article-title{font-size:26px}
  .related-card{flex-direction:column;align-items:flex-start}
  .related-thumb{width:100%;aspect-ratio:16/10}
  .faq-wrap{padding:4px 18px}
  .faq-wrap .accordion-title{padding:18px 32px 18px 0}
  .cta-actions .btn{width:100%}
}

/* roulang page: category1 */
/* ============ 设计变量 ============ */
:root{
  --bg:#F7F6F2;
  --bg-alt:#EFEEE8;
  --ink-900:#0B0C12;
  --ink-700:#1A1D26;
  --text:#14161B;
  --text-muted:#5C6270;
  --primary:#0E9F8E;
  --primary-600:#0B8577;
  --secondary:#241E44;
  --accent:#FF6A3D;
  --line:rgba(20,22,27,.10);
  --line-dark:rgba(255,255,255,.14);
  --star:rgba(255,255,255,.72);
  --radius-card:14px;
  --radius-img:12px;
  --radius-btn:10px;
  --radius-tag:6px;
  --shadow-1:0 6px 18px rgba(11,12,18,.06);
  --shadow-2:0 16px 28px rgba(11,12,18,.14);
  --font-sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"Space Grotesk","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --maxw:1200px;
  --pad:20px;
}
@media (min-width:640px){:root{--pad:32px}}
@media (min-width:1024px){:root{--pad:48px}}

/* ============ reset / base ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.82;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--primary);text-decoration:none;background:transparent}
a:hover{color:var(--primary-600)}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.18;color:var(--text)}
p{margin:0 0 1.05em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
button,input{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border:1px solid transparent;border-radius:var(--radius-btn);
  font-size:15px;font-weight:700;line-height:1;cursor:pointer;white-space:nowrap;
  transition:background-color .25s ease,color .25s ease,border-color .25s ease,transform .18s ease,box-shadow .25s ease;
}
.btn-arrow{display:inline-block;transition:transform .25s cubic-bezier(.2,.7,.2,1);font-family:var(--font-mono)}
.btn:hover .btn-arrow{transform:translateX(4px)}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-600);color:#fff}
.btn-ghost{border-color:var(--line);color:var(--text);background:transparent}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary-600)}
.btn-light{background:#fff;color:var(--ink-900)}
.btn-light:hover{background:#F1F7F5;color:var(--ink-900)}
.btn-outline-light{border-color:var(--line-dark);color:#fff;background:transparent}
.btn-outline-light:hover{border-color:var(--primary);color:#fff}
.btn-block{width:100%}

/* ============ 页头导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--bg);
  border-bottom:1px solid transparent;
  transition:box-shadow .2s ease,border-color .2s ease,background-color .2s ease;
}
.site-header.is-scrolled{
  background:#FBFAF6;
  border-bottom-color:var(--line);
  box-shadow:0 6px 18px rgba(11,12,18,.07);
}
.header-inner{display:flex;align-items:center;gap:22px;height:72px;transition:height .2s ease}
.site-header.is-scrolled .header-inner{height:60px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);flex:0 0 auto}
.brand:hover{color:var(--text)}
.brand-icon{display:inline-flex;width:24px;height:24px;color:var(--primary)}
.brand-icon svg{width:24px;height:24px;display:block}
.brand-text{font-size:17px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:26px;margin-left:auto}
.nav-link{
  position:relative;padding:6px 0;font-size:15px;font-weight:600;color:var(--text-muted);
  transition:color .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;border-radius:2px;
  background:var(--primary);transition:width .28s cubic-bezier(.2,.7,.2,1);
}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--text)}
.nav-link.is-active::after{width:100%}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.header-search input{
  width:224px;height:40px;padding:0 14px;border:1px solid var(--line);border-radius:var(--radius-btn);
  background:#fff;font-size:14px;color:var(--text);transition:border-color .2s ease,box-shadow .2s ease;
}
.header-search input::placeholder{color:#8A909C}
.header-search input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(14,159,142,.14);outline:none}
.nav-toggle{
  display:none;width:44px;height:40px;border:1px solid var(--line);border-radius:var(--radius-btn);
  background:#fff;cursor:pointer;align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-900);border-radius:2px;transition:transform .2s ease,opacity .2s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.mobile-drawer{display:none}

@media (max-width:1023px){
  .main-nav,.header-search,.header-actions .btn{display:none}
  .nav-toggle{display:inline-flex}
  .brand-text{font-size:16px}
  .mobile-drawer{
    display:block;position:fixed;top:60px;left:0;right:0;bottom:0;z-index:79;
    background:var(--bg);border-top:1px solid var(--line);
    padding:24px var(--pad) 40px;overflow-y:auto;
    transform:translateY(-8px);opacity:0;visibility:hidden;pointer-events:none;
    transition:opacity .22s ease,transform .22s ease,visibility .22s;
  }
  .mobile-drawer.is-open{opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0)}
  .mobile-drawer .drawer-search{width:100%;height:46px;padding:0 14px;border:1px solid var(--line);border-radius:var(--radius-btn);background:#fff;font-size:15px;margin-bottom:22px}
  .mobile-drawer .drawer-nav{display:grid;gap:2px;margin-bottom:24px}
  .mobile-drawer .drawer-nav a{
    display:block;padding:15px 4px;font-size:16px;font-weight:600;color:var(--text);
    border-bottom:1px solid var(--line);
  }
  .mobile-drawer .drawer-nav a.is-active{color:var(--primary-600)}
  .mobile-drawer .drawer-actions{display:grid;gap:12px}
}

/* ============ 通用板块 ============ */
.section{padding:60px 0}
@media (min-width:1024px){.section{padding:104px 0}}
.section-alt{background:var(--bg-alt)}
.section-head{max-width:780px;margin-bottom:38px}
.section-kicker{
  display:inline-block;font-family:var(--font-mono);font-size:12.5px;letter-spacing:.14em;
  color:var(--primary-600);text-transform:uppercase;margin-bottom:12px;
}
.section-title{
  display:inline-block;position:relative;font-size:clamp(22px,2.5vw,32px);margin-bottom:14px;
}
.section-title::after{
  content:"";position:absolute;left:0;bottom:-9px;height:3px;width:0;border-radius:2px;
  background:var(--primary);transition:width .7s cubic-bezier(.2,.7,.2,1);
}
.section-title.is-visible::after{width:100%}
.section-desc{color:var(--text-muted);font-size:16px;max-width:720px}

/* ============ 星点深色底 ============ */
.dark-band{position:relative;background:var(--ink-900);color:#fff;overflow:hidden}
.dark-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.07;
  background-image:radial-gradient(rgba(255,255,255,.9) 1px,transparent 1px);
  background-size:98px 98px;background-position:0 0;
}
.dark-band > *{position:relative;z-index:1}
.dark-band h1,.dark-band h2,.dark-band h3{color:#fff}

/* ============ 分类 Hero ============ */
.cat-hero{padding:52px 0 68px}
@media (min-width:1024px){.cat-hero{padding:72px 0 96px}}
.breadcrumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13.5px;color:rgba(255,255,255,.6);margin-bottom:26px;
}
.breadcrumb a{color:rgba(255,255,255,.72)}
.breadcrumb a:hover{color:#fff}
.breadcrumb .sep{color:rgba(255,255,255,.34)}
.breadcrumb .current{color:rgba(255,255,255,.5);max-width:240px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hero-grid{align-items:center}
.hero-copy .eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:5px 12px;border-radius:var(--radius-tag);
  background:rgba(14,159,142,.16);color:#5FE3D2;font-size:13px;font-weight:700;margin-bottom:20px;
}
.hero-copy h1{
  font-size:clamp(28px,5.4vw,58px);line-height:1.16;letter-spacing:-.025em;margin-bottom:18px;
}
.hero-copy h1 em{font-style:normal;color:#5FE3D2}
.hero-sub{font-size:17px;color:rgba(255,255,255,.78);max-width:560px;margin-bottom:30px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px}
.trust-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  font-size:13.5px;color:rgba(255,255,255,.66);
}
.trust-row .bar{width:1px;height:14px;background:var(--line-dark)}
.hero-visual{position:relative;border-radius:var(--radius-img);overflow:hidden;margin-top:38px}
.hero-visual img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-visual::after{content:"";position:absolute;inset:0;background:rgba(11,12,18,.18)}
.hero-visual .float-card{
  position:absolute;left:18px;bottom:18px;right:18px;z-index:2;
  background:#fff;color:var(--text);border-radius:var(--radius-tag);padding:14px 16px;
  box-shadow:var(--shadow-2);
}
.hero-visual .float-card strong{display:block;font-size:22px;font-family:var(--font-mono);color:var(--ink-900);line-height:1.2}
.hero-visual .float-card span{font-size:13px;color:var(--text-muted)}
@media (min-width:1024px){.hero-visual{margin-top:0}}

/* ============ 覆盖范围（不对称） ============ */
.range-main{display:flex;flex-direction:column;height:100%}
.range-side{display:grid;gap:20px;align-content:start}
.cover-frame{border-radius:var(--radius-img);overflow:hidden;background:var(--bg-alt)}
.cover-frame img{width:100%;height:100%;object-fit:cover;transition:transform .7s cubic-bezier(.2,.7,.2,1)}
.cover-frame.tall img{aspect-ratio:16/9}
.cover-frame.wide img{aspect-ratio:16/7}
.cover-frame.square img{aspect-ratio:16/10}
.range-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);overflow:hidden;height:100%;
  transition:transform .45s cubic-bezier(.2,.7,.2,1),box-shadow .45s ease;
}
.range-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.range-card:hover .cover-frame img{transform:scale(1.04)}
.range-body{padding:24px 26px 26px}
.range-body h3{font-size:19px;margin-bottom:10px}
.range-body p{color:var(--text-muted);font-size:15.5px}
.mini-row{
  display:grid;grid-template-columns:1fr;gap:0;margin-top:24px;
  border-top:1px solid var(--line);
}
.mini-row li{
  display:flex;align-items:center;gap:14px;padding:16px 4px;border-bottom:1px solid var(--line);
  font-size:15px;color:var(--text);
}
.mini-row li .dot-mark{width:6px;height:6px;border-radius:50%;background:var(--primary);flex:0 0 auto}
.mini-row li span.note{margin-left:auto;font-family:var(--font-mono);font-size:12.5px;color:var(--text-muted)}
@media (min-width:760px){.mini-row{grid-template-columns:1fr 1fr;column-gap:32px}}

/* ============ 核验流程 ============ */
.steps{display:grid;gap:28px}
@media (min-width:900px){.steps{grid-template-columns:repeat(3,1fr);gap:26px}}
.step{
  position:relative;padding:26px 24px 28px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);box-shadow:var(--shadow-1);
}
.step:not(:last-child)::after{
  content:"";position:absolute;right:-16px;top:50%;width:16px;height:1px;background:var(--line);display:none;
}
@media (min-width:900px){.step:not(:last-child)::after{display:block}}
.step-num{
  display:block;font-family:var(--font-mono);font-weight:700;font-size:clamp(48px,6vw,76px);line-height:1;
  color:transparent;-webkit-text-stroke:1.4px rgba(20,22,27,.24);margin-bottom:14px;
}
.step h3{font-size:18px;margin-bottom:10px}
.step p{color:var(--text-muted);font-size:15px}
.step .step-tag{
  display:inline-block;margin-top:14px;font-family:var(--font-mono);font-size:12.5px;
  color:var(--primary-600);border-bottom:1px solid rgba(14,159,142,.4);padding-bottom:2px;
}

/* ============ 内容卡列表 ============ */
.card{
  display:flex;flex-direction:column;height:100%;background:#fff;color:inherit;
  border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:transform .45s cubic-bezier(.2,.7,.2,1),box-shadow .45s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);color:inherit}
.card-cover{aspect-ratio:16/10;overflow:hidden;background:var(--bg-alt)}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .7s cubic-bezier(.2,.7,.2,1)}
.card:hover .card-cover img{transform:scale(1.04)}
.card-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:17.5px;line-height:1.45}
.card-body p{color:var(--text-muted);font-size:14.8px;line-height:1.75}
.card-foot{display:flex;align-items:center;gap:10px;margin-top:auto;padding-top:6px}
.badge{
  display:inline-block;padding:4px 10px;border-radius:var(--radius-tag);
  font-size:12.5px;font-weight:700;line-height:1.5;
  background:rgba(14,159,142,.12);color:var(--primary-600);
}
.badge-dark{background:var(--secondary);color:#fff}
.badge-accent{background:rgba(255,106,61,.14);color:#C43E14}
.meta{font-family:var(--font-mono);font-size:12.5px;color:var(--text-muted);margin-left:auto}
.grid-gap > .cell{margin-bottom:24px}

/* ============ FAQ ============ */
.faq-wrap{max-width:900px}
.faq-block{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden}
.faq-block .accordion{margin:0;border:0;background:transparent;list-style:none}
.faq-block .accordion-item{border-bottom:1px solid var(--line)}
.faq-block .accordion-item:last-child{border-bottom:0}
.faq-block .accordion-title{
  position:relative;display:block;padding:20px 54px 20px 24px;border:0;background:transparent;
  font-size:16px;font-weight:700;color:var(--text);line-height:1.6;transition:color .2s ease,background-color .2s ease;
}
.faq-block .accordion-title:hover{color:var(--primary-600);background:#FAFAF7}
.faq-block .accordion-title::before{
  content:"";position:absolute;right:24px;top:50%;width:9px;height:9px;
  border-right:2px solid var(--primary);border-bottom:2px solid var(--primary);
  transform:translateY(-70%) rotate(45deg);transition:transform .3s cubic-bezier(.2,.7,.2,1);
}
.faq-block .accordion-item.is-active .accordion-title::before{transform:translateY(-30%) rotate(-135deg)}
.faq-block .accordion-title::after{
  content:"";position:absolute;left:0;top:19px;bottom:19px;width:2px;border-radius:2px;background:var(--primary);
}
.faq-block .accordion-content{
  padding:0 54px 22px 24px;border:0;background:transparent;color:var(--text-muted);font-size:15.2px;line-height:1.85;
}
.faq-block .accordion-content p{margin-bottom:.7em}

/* ============ CTA ============ */
.cta-band{padding:72px 0}
@media (min-width:1024px){.cta-band{padding:96px 0}}
.cta-inner{max-width:760px}
.cta-inner h2{font-size:clamp(25px,3vw,40px);margin-bottom:16px}
.cta-inner p{color:rgba(255,255,255,.76);font-size:16.5px;margin-bottom:28px}
.cta-note{margin-top:22px;font-size:13.5px;color:rgba(255,255,255,.6);display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.cta-note .bar{width:1px;height:13px;background:var(--line-dark)}

/* ============ 页脚 ============ */
.site-footer{position:relative;background:var(--ink-900);color:#fff;padding:64px 0 26px;overflow:hidden}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.06;
  background-image:radial-gradient(rgba(255,255,255,.9) 1px,transparent 1px);
  background-size:110px 110px;
}
.site-footer > *{position:relative;z-index:1}
.footer-grid{display:grid;grid-template-columns:1fr;gap:40px}
@media (min-width:640px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px}}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:800;color:#fff;margin-bottom:14px}
.footer-brand .brand-icon{color:var(--primary)}
.footer-desc{color:rgba(255,255,255,.66);font-size:14.5px;max-width:280px;line-height:1.8}
.footer-col h4{font-size:13.5px;font-weight:700;color:rgba(255,255,255,.6);letter-spacing:.06em;margin-bottom:16px}
.footer-col ul{display:grid;gap:10px}
.footer-col a{color:rgba(255,255,255,.82);font-size:14.5px;transition:color .2s ease}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between;align-items:center;
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line-dark);
  font-size:13px;color:rgba(255,255,255,.58);
}
.footer-bottom .dot{display:inline-block;width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.4);margin:0 8px;vertical-align:middle}

/* ============ 入场动效 ============ */
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.hero-copy .anim{opacity:0;animation:fadeUp .42s cubic-bezier(.2,.7,.2,1) forwards}
.hero-copy .anim:nth-child(1){animation-delay:.04s}
.hero-copy .anim:nth-child(2){animation-delay:.10s}
.hero-copy .anim:nth-child(3){animation-delay:.16s}
.hero-copy .anim:nth-child(4){animation-delay:.22s}
.hero-copy .anim:nth-child(5){animation-delay:.28s}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
  .hero-copy .anim{opacity:1;animation:none}
}

/* roulang page: category2 */
:root{
  --bg:#F7F6F2;
  --bg-alt:#EFEEE8;
  --ink-900:#0B0C12;
  --ink-700:#1A1D26;
  --text:#14161B;
  --text-muted:#5C6270;
  --primary:#0E9F8E;
  --primary-600:#0B8577;
  --secondary:#241E44;
  --accent:#FF6A3D;
  --line:rgba(20,22,27,.10);
  --line-dark:rgba(255,255,255,.14);
  --star:rgba(255,255,255,.72);
  --radius-card:14px;
  --radius-img:12px;
  --radius-btn:10px;
  --radius-tag:6px;
  --shadow-1:0 6px 18px rgba(11,12,18,.06);
  --shadow-2:0 14px 28px rgba(11,12,18,.14);
  --container:1200px;
  --container-wide:1320px;
  --mono:"JetBrains Mono","Space Grotesk",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:16.5px;
  line-height:1.8;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--primary-600);}
button,input{font-family:inherit;font-size:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.15;color:var(--ink-900);}
p{margin:0;}
::selection{background:rgba(14,159,142,.22);}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}

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

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:var(--bg);
  border-bottom:1px solid transparent;
  transition:height .2s ease,background-color .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.site-header.is-scrolled{
  background:#F7F6F2;
  border-bottom:1px solid var(--line);
  box-shadow:0 4px 14px rgba(11,12,18,.05);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:26px;
  height:72px;
  transition:height .2s ease;
}
.site-header.is-scrolled .header-inner{height:60px;}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  color:var(--ink-900);
  font-weight:900;
  font-size:18px;
  letter-spacing:-.01em;
  white-space:nowrap;
}
.brand:hover{color:var(--ink-900);}
.brand-icon{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:30px;
  height:30px;
  border-radius:9px;
  background:var(--ink-900);
  color:var(--primary);
  flex:0 0 auto;
}
.brand-icon svg{width:18px;height:18px;display:block;}
.main-nav{
  display:flex;
  align-items:center;
  gap:4px;
  flex:1 1 auto;
  min-width:0;
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  font-size:15px;
  font-weight:500;
  color:var(--text);
  border-radius:8px;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:2px;
  height:2px;
  background:var(--primary);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .28s cubic-bezier(.2,.7,.2,1);
}
.nav-link:hover{color:var(--primary);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--primary);font-weight:600;}
.nav-link.is-active::after{transform:scaleX(1);}
.header-actions{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
}
.search-form{position:relative;width:228px;}
.search-form input[type="search"]{
  width:100%;
  height:42px;
  margin:0;
  padding:0 14px 0 38px;
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  background:#fff;
  color:var(--text);
  font-size:14px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search-form input[type="search"]::placeholder{color:#9AA0AC;}
.search-form input[type="search"]:focus{
  outline:none;
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(14,159,142,.14);
}
.search-form .search-icon{
  position:absolute;
  left:13px;
  top:50%;
  transform:translateY(-50%);
  width:16px;
  height:16px;
  color:var(--text-muted);
  pointer-events:none;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 22px;
  border:1px solid transparent;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  white-space:nowrap;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .12s ease,box-shadow .25s ease;
}
.btn .arrow{transition:transform .25s cubic-bezier(.2,.7,.2,1);display:inline-block;}
.btn:hover .arrow{transform:translateX(4px);}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-600);color:#fff;}
.btn-ghost{background:transparent;color:var(--ink-900);border-color:rgba(20,22,27,.24);}
.btn-ghost:hover{border-color:var(--ink-900);color:var(--ink-900);}
.btn-on-dark{background:#fff;color:var(--ink-900);}
.btn-on-dark:hover{background:#EDEBE4;color:var(--ink-900);}
.btn-accent{background:var(--accent);color:#fff;}
.btn-accent:hover{background:#E85A2E;color:#fff;}
.btn-sm{height:40px;padding:0 16px;font-size:14px;}
.btn-text{
  font-size:14px;
  font-weight:600;
  color:var(--ink-900);
  padding:8px 4px;
  white-space:nowrap;
}
.btn-text:hover{color:var(--primary);}
.nav-toggle{
  display:none;
  width:42px;
  height:42px;
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  background:#fff;
  color:var(--ink-900);
  cursor:pointer;
  align-items:center;
  justify-content:center;
}
.nav-toggle span{
  display:block;
  width:18px;
  height:2px;
  background:var(--ink-900);
  position:relative;
}
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;
  height:2px;
  background:var(--ink-900);
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

.mobile-drawer{
  display:none;
  border-top:1px solid var(--line);
  background:var(--bg);
  padding:18px 20px 26px;
}
.mobile-drawer.is-open{display:block;}
.mobile-drawer .search-form{width:100%;margin-bottom:16px;}
.mobile-drawer .drawer-links{display:flex;flex-direction:column;gap:2px;}
.mobile-drawer .drawer-links a{
  padding:13px 4px;
  font-size:16px;
  font-weight:500;
  color:var(--text);
  border-bottom:1px solid var(--line);
}
.mobile-drawer .drawer-links a.is-active{color:var(--primary);font-weight:700;}
.mobile-drawer .drawer-actions{display:flex;flex-direction:column;gap:10px;margin-top:18px;}
.mobile-drawer .btn{width:100%;}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  color:#fff;
  background-color:var(--ink-900);
  background-image:linear-gradient(100deg,rgba(11,12,18,.90) 0%,rgba(11,12,18,.72) 48%,rgba(11,12,18,.60) 100%),url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.hero::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(255,255,255,.9) 1px,transparent 1px);
  background-size:34px 34px;
  opacity:.06;
  pointer-events:none;
}
.hero-inner{
  position:relative;
  z-index:2;
  padding:64px 0 62px;
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
  gap:56px;
  align-items:center;
}
.hero h1{
  color:#fff;
  font-size:clamp(30px,4.6vw,58px);
  font-weight:900;
  line-height:1.14;
  letter-spacing:-.02em;
  padding-left:20px;
  border-left:3px solid var(--primary);
  max-width:15em;
}
.hero h1 .h1-line{display:block;}
.hero h1 .h1-em{color:#8FE7DC;}
.hero-sub{
  margin-top:20px;
  font-size:17px;
  line-height:1.75;
  color:rgba(255,255,255,.82);
  max-width:32em;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:30px;
}
.hero-trust{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px;
  margin-top:30px;
  font-size:14px;
  color:var(--star);
}
.hero-trust span.sep{width:1px;height:14px;background:var(--line-dark);display:inline-block;}

.steps-card{
  background:rgba(36,30,68,.86);
  border:1px solid var(--line-dark);
  border-radius:var(--radius-card);
  padding:26px 26px 22px;
}
.steps-card h2{
  color:#fff;
  font-size:16px;
  letter-spacing:.06em;
  font-weight:700;
  margin-bottom:6px;
}
.steps-card .card-note{
  font-size:13px;
  color:rgba(255,255,255,.62);
  margin-bottom:18px;
}
.steps-list{display:flex;flex-direction:column;}
.steps-list li{
  display:flex;
  gap:14px;
  padding:14px 0;
  border-top:1px solid var(--line-dark);
}
.steps-list li:first-child{border-top:none;padding-top:0;}
.steps-list .num{
  font-family:var(--mono);
  font-size:15px;
  color:var(--primary);
  flex:0 0 auto;
  padding-top:1px;
  letter-spacing:.04em;
}
.steps-list .st-title{
  color:#fff;
  font-size:15.5px;
  font-weight:600;
  line-height:1.5;
}
.steps-list .st-desc{
  color:rgba(255,255,255,.66);
  font-size:13.5px;
  line-height:1.7;
  margin-top:4px;
}

/* ---------- 通用板块 ---------- */
.section{padding:64px 0;}
.section-alt{background:var(--bg-alt);}
.section-dark{
  background:var(--ink-900);
  color:#fff;
  position:relative;
  overflow:hidden;
}
.section-dark::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(255,255,255,.85) 1px,transparent 1px);
  background-size:38px 38px;
  opacity:.05;
  pointer-events:none;
}
.section-dark .container{position:relative;z-index:2;}

.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:18px;
  margin-bottom:40px;
}
.section-head .eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--mono);
  font-size:12.5px;
  letter-spacing:.16em;
  color:var(--primary);
  text-transform:uppercase;
  margin-bottom:12px;
}
.section-head .eyebrow::before{
  content:"";
  width:22px;
  height:2px;
  background:var(--primary);
  display:inline-block;
}
.section-head h2{
  font-size:clamp(24px,2.6vw,36px);
  position:relative;
  display:inline-block;
  padding-bottom:10px;
}
.section-head h2::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  height:2px;
  width:0;
  background:var(--primary);
  transition:width .8s cubic-bezier(.2,.7,.2,1);
}
.section-head.is-in h2::after{width:100%;}
.section-head p.lead{
  margin-top:14px;
  color:var(--text-muted);
  font-size:16px;
  max-width:44em;
}
.section-dark .section-head h2,
.section-dark .section-head .lead{color:#fff;}
.section-dark .section-head .lead{color:rgba(255,255,255,.72);}

/* ---------- 覆盖范围：不对称图文 ---------- */
.scope-grid{
  display:grid;
  grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);
  gap:24px;
  align-items:stretch;
}
.scope-main{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  overflow:hidden;
  display:flex;
  flex-direction:column;
  transition:transform .5s cubic-bezier(.2,.7,.2,1),box-shadow .5s ease;
}
.scope-main:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.scope-main figure{margin:0;overflow:hidden;aspect-ratio:16/9;background:var(--bg-alt);}
.scope-main figure img{width:100%;height:100%;object-fit:cover;transition:transform .7s cubic-bezier(.2,.7,.2,1);}
.scope-main:hover figure img{transform:scale(1.04);}
.scope-body{padding:26px 28px 28px;}
.scope-body h3{font-size:22px;margin-bottom:12px;}
.scope-body p{color:var(--text-muted);font-size:15.5px;line-height:1.8;}
.scope-body .scope-meta{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  margin-top:18px;
}
.tag{
  display:inline-block;
  padding:4px 10px;
  border-radius:var(--radius-tag);
  font-size:12.5px;
  font-weight:600;
  background:rgba(14,159,142,.12);
  color:var(--primary-600);
  letter-spacing:.02em;
}
.tag-purple{background:rgba(36,30,68,.10);color:var(--secondary);}
.tag-accent{background:rgba(255,106,61,.14);color:#C4461F;}

.scope-side{display:flex;flex-direction:column;gap:16px;}
.scope-item{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:20px 22px;
  box-shadow:var(--shadow-1);
  display:flex;
  gap:16px;
  align-items:flex-start;
  transition:transform .45s cubic-bezier(.2,.7,.2,1),box-shadow .45s ease,border-color .3s ease;
  flex:1;
}
.scope-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(14,159,142,.34);}
.scope-item .idx{
  font-family:var(--mono);
  font-size:13px;
  font-weight:600;
  color:var(--primary);
  border:1px solid rgba(14,159,142,.32);
  border-radius:6px;
  padding:3px 8px;
  flex:0 0 auto;
  margin-top:2px;
}
.scope-item h3{font-size:17px;margin-bottom:7px;}
.scope-item p{font-size:14.5px;color:var(--text-muted);line-height:1.75;}

/* ---------- 行式细则列表 ---------- */
.row-list{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
}
.row-item{
  display:grid;
  grid-template-columns:76px minmax(0,1fr) 34px;
  align-items:center;
  gap:20px;
  padding:22px 26px;
  border-bottom:1px solid var(--line);
  color:inherit;
  transition:background-color .28s ease,padding-left .28s ease;
}
.row-item:last-child{border-bottom:none;}
.row-item:hover{background:#FAF9F5;color:inherit;}
.row-item:hover .row-arrow{transform:translateX(5px);color:var(--primary);}
.row-item:hover .row-title{color:var(--primary);}
.row-num{
  font-family:var(--mono);
  font-size:20px;
  font-weight:600;
  color:rgba(20,22,27,.24);
  letter-spacing:.02em;
}
.row-title{
  font-size:17px;
  font-weight:700;
  color:var(--ink-900);
  letter-spacing:-.01em;
  transition:color .25s ease;
}
.row-desc{
  margin-top:6px;
  font-size:14.5px;
  color:var(--text-muted);
  line-height:1.75;
}
.row-meta{
  margin-top:10px;
  display:flex;
  gap:8px;
  flex-wrap:wrap;
  align-items:center;
  font-family:var(--mono);
  font-size:12.5px;
  color:#8B909C;
}
.row-arrow{
  font-size:20px;
  color:rgba(20,22,27,.30);
  transition:transform .3s cubic-bezier(.2,.7,.2,1),color .3s ease;
  justify-self:end;
  line-height:1;
}

/* ---------- 进度/说明条 ---------- */
.progress-strip{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:18px;
  margin-top:8px;
}
.progress-cell{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:20px 20px 18px;
  box-shadow:var(--shadow-1);
}
.progress-cell .pc-label{
  font-size:13.5px;
  color:var(--text-muted);
  margin-bottom:10px;
}
.progress-cell .pc-num{
  font-family:var(--mono);
  font-size:30px;
  font-weight:600;
  color:var(--ink-900);
  line-height:1;
  letter-spacing:-.02em;
}
.progress-cell .pc-bar{
  margin-top:14px;
  height:4px;
  border-radius:99px;
  background:rgba(20,22,27,.08);
  overflow:hidden;
}
.progress-cell .pc-bar i{
  display:block;
  height:100%;
  border-radius:99px;
  background:var(--primary);
}
.progress-cell .pc-bar i.alt{background:var(--secondary);}
.progress-cell .pc-bar i.warm{background:var(--accent);}

/* ---------- FAQ ---------- */
.faq-block{
  background:var(--bg-alt);
  border-radius:var(--radius-card);
  padding:10px 28px;
  border:1px solid var(--line);
}
.faq-block .accordion{
  margin:0;
  background:transparent;
  border:none;
}
.faq-block .accordion-item{border:none;background:transparent;}
.faq-block .accordion-title{
  display:block;
  border-bottom:1px solid var(--line);
  padding:22px 46px 22px 22px;
  font-size:16px;
  font-weight:600;
  color:var(--ink-900);
  line-height:1.6;
  position:relative;
  transition:color .25s ease;
}
.faq-block .accordion-title::before{
  content:"";
  position:absolute;
  left:0;
  top:26px;
  width:3px;
  height:18px;
  border-radius:2px;
  background:var(--primary);
}
.faq-block .accordion-title::after{
  content:"";
  position:absolute;
  right:22px;
  top:50%;
  width:9px;
  height:9px;
  border-right:2px solid var(--text-muted);
  border-bottom:2px solid var(--text-muted);
  transform:translateY(-70%) rotate(45deg);
  transition:transform .3s cubic-bezier(.2,.7,.2,1),border-color .3s ease;
}
.faq-block .accordion-title:hover{color:var(--primary);}
.faq-block .accordion-item.is-active .accordion-title{color:var(--primary);}
.faq-block .accordion-item.is-active .accordion-title::after{
  transform:translateY(-30%) rotate(225deg);
  border-color:var(--primary);
}
.faq-block .accordion-content{
  border-bottom:1px solid var(--line);
  padding:0 46px 24px 22px;
  color:var(--text-muted);
  font-size:15px;
  line-height:1.85;
  background:transparent;
}
.faq-block .accordion-item:last-child .accordion-title{border-bottom:none;}
.faq-block .accordion-item:last-child.is-active .accordion-content{border-bottom:none;}

/* ---------- CTA ---------- */
.cta-band{
  padding:72px 0;
  background:var(--ink-900);
  color:#fff;
  position:relative;
  overflow:hidden;
}
.cta-band::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(255,255,255,.9) 1px,transparent 1px);
  background-size:36px 36px;
  opacity:.05;
  pointer-events:none;
}
.cta-inner{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);
  gap:44px;
  align-items:center;
}
.cta-inner h2{
  color:#fff;
  font-size:clamp(24px,2.8vw,38px);
  line-height:1.2;
}
.cta-inner p{
  margin-top:16px;
  color:rgba(255,255,255,.74);
  font-size:16px;
  max-width:36em;
}
.cta-note{
  margin-top:18px;
  font-family:var(--mono);
  font-size:13px;
  color:var(--star);
  letter-spacing:.02em;
}
.cta-actions{
  display:flex;
  flex-direction:column;
  gap:14px;
  align-items:stretch;
}
.cta-actions .btn{width:100%;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink-900);
  color:rgba(255,255,255,.72);
  position:relative;
  overflow:hidden;
  padding-top:64px;
}
.site-footer::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(255,255,255,.9) 1px,transparent 1px);
  background-size:40px 40px;
  opacity:.05;
  pointer-events:none;
}
.site-footer .container{position:relative;z-index:2;}
.footer-main{padding-bottom:44px;}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.6fr) repeat(3,minmax(0,1fr));
  gap:36px;
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  color:#fff;
  font-size:18px;
  font-weight:900;
  letter-spacing:-.01em;
}
.footer-brand .brand-icon{
  background:rgba(255,255,255,.08);
  color:var(--primary);
}
.footer-desc{
  margin-top:16px;
  font-size:14px;
  line-height:1.8;
  color:rgba(255,255,255,.60);
  max-width:24em;
}
.footer-col h4{
  color:#fff;
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  margin-bottom:16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{
  color:rgba(255,255,255,.68);
  font-size:14px;
  transition:color .2s ease;
}
.footer-col a:hover{color:var(--primary);}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:12px;
  padding:22px 0 30px;
  border-top:1px solid var(--line-dark);
  font-family:var(--mono);
  font-size:12.5px;
  color:rgba(255,255,255,.52);
}
.footer-bottom .dot{
  display:inline-block;
  width:4px;
  height:4px;
  border-radius:50%;
  background:rgba(255,255,255,.35);
  margin:0 8px;
  vertical-align:middle;
}

/* ---------- 入场动画 ---------- */
.fade-up{
  opacity:0;
  transform:translateY(12px);
  animation:fadeUp .42s cubic-bezier(.2,.7,.2,1) forwards;
}
@keyframes fadeUp{to{opacity:1;transform:translateY(0);}}
.d1{animation-delay:.06s;}
.d2{animation-delay:.12s;}
.d3{animation-delay:.18s;}
.d4{animation-delay:.24s;}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .main-nav{display:none;}
  .search-form{display:none;}
  .header-actions .btn-text{display:none;}
  .header-actions .btn-primary{display:none;}
  .nav-toggle{display:inline-flex;}
  .brand{font-size:17px;}
  .hero-inner{
    grid-template-columns:1fr;
    gap:34px;
    padding:48px 0 52px;
  }
  .scope-grid{grid-template-columns:1fr;}
  .progress-strip{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-inner{grid-template-columns:1fr;gap:28px;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
  .section{padding:56px 0;}
}
@media (max-width:639px){
  body{font-size:16px;}
  .container,.container-wide{padding:0 20px;}
  .header-inner{gap:14px;}
  .brand{font-size:15.5px;max-width:190px;white-space:normal;line-height:1.3;}
  .brand-icon{width:26px;height:26px;border-radius:8px;}
  .brand-icon svg{width:15px;height:15px;}
  .hero h1{font-size:clamp(26px,7.6vw,34px);padding-left:16px;max-width:none;}
  .hero-sub{font-size:15.5px;}
  .hero-actions{gap:10px;}
  .hero-actions .btn{flex:1 1 100%;}
  .hero-trust{font-size:13px;gap:10px;}
  .steps-card{padding:22px 20px 18px;}
  .section-head{margin-bottom:28px;}
  .section-head h2{font-size:23px;}
  .scope-body{padding:20px 20px 22px;}
  .scope-body h3{font-size:19px;}
  .row-item{
    grid-template-columns:52px minmax(0,1fr) 22px;
    gap:14px;
    padding:18px 18px;
  }
  .row-num{font-size:16px;}
  .row-title{font-size:15.5px;}
  .row-desc{font-size:13.8px;}
  .progress-strip{grid-template-columns:1fr;gap:12px;}
  .progress-cell{padding:18px;}
  .progress-cell .pc-num{font-size:26px;}
  .faq-block{padding:6px 18px;}
  .faq-block .accordion-title{padding:18px 38px 18px 18px;font-size:15px;}
  .faq-block .accordion-title::before{top:21px;height:16px;}
  .faq-block .accordion-title::after{right:16px;}
  .faq-block .accordion-content{padding:0 18px 20px 18px;font-size:14.5px;}
  .cta-band{padding:56px 0;}
  .footer-grid{grid-template-columns:1fr;gap:34px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;font-size:12px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .fade-up{opacity:1;transform:none;}
  .section-head h2::after{width:100%;}
}

/* roulang page: category3 */
:root{
  --bg:#F7F6F2;
  --bg-alt:#EFEEE8;
  --ink-900:#0B0C12;
  --ink-700:#1A1D26;
  --text:#14161B;
  --text-muted:#5C6270;
  --primary:#0E9F8E;
  --primary-600:#0B8577;
  --secondary:#241E44;
  --accent:#FF6A3D;
  --line:rgba(20,22,27,.10);
  --line-dark:rgba(255,255,255,.14);
  --star:rgba(255,255,255,.72);
  --radius-card:14px;
  --radius-img:12px;
  --radius-btn:10px;
  --radius-tag:6px;
  --shadow-1:0 2px 18px rgba(11,12,18,.06);
  --shadow-2:0 10px 28px rgba(11,12,18,.14);
  --container:1200px;
  --mono:"Space Grotesk","JetBrains Mono",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;
  background:var(--bg);
  color:var(--text);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input{font-family:inherit;font-size:inherit}
button{cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.18;color:var(--ink-900)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
::selection{background:rgba(14,159,142,.22)}

.container{width:100%;max-width:var(--container);margin:0 auto;padding-left:20px;padding-right:20px}
@media (min-width:640px){.container{padding-left:32px;padding-right:32px}}
@media (min-width:1024px){.container{padding-left:48px;padding-right:48px}}

.grid-x{margin-left:-12px;margin-right:-12px}
.grid-x>.cell{padding-left:12px;padding-right:12px;min-width:0}
.grid-x.grid-margin-x{margin-left:-12px;margin-right:-12px}
.grid-x.grid-margin-x>.cell{margin-left:0;margin-right:0;padding-left:12px;padding-right:12px}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(247,246,242,.96);
  border-bottom:1px solid transparent;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 6px 20px rgba(11,12,18,.06)}
.header-inner{display:flex;align-items:center;gap:22px;height:72px;transition:height .2s ease}
@media (min-width:1024px){.site-header.is-scrolled .header-inner{height:60px}}

.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ink-900);font-weight:800;letter-spacing:-.02em;font-size:17px}
.brand-icon{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;color:var(--primary)}
.brand-icon svg{width:24px;height:24px;display:block}
.brand-text{white-space:nowrap}

.main-nav{display:none;align-items:center;gap:4px;margin-left:8px}
@media (min-width:1024px){.main-nav{display:flex}}
.nav-link{position:relative;padding:10px 12px;font-size:15px;font-weight:500;color:var(--text);border-radius:8px;transition:color .2s ease}
.nav-link::after{content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform .24s cubic-bezier(.2,.7,.2,1)}
.nav-link:hover{color:var(--primary)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--ink-900);font-weight:700}
.nav-link.is-active::after{transform:scaleX(1)}

.header-actions{display:none;align-items:center;gap:14px;margin-left:auto}
@media (min-width:1024px){.header-actions{display:flex}}
.header-search{position:relative}
.header-search input{
  width:220px;height:42px;border:1px solid var(--line);border-radius:var(--radius-btn);
  background:#fff;padding:0 14px 0 38px;color:var(--text);font-size:14px;outline:none;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.header-search input::placeholder{color:#9AA0AC}
.header-search input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(14,159,142,.14)}
.header-search svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:#9AA0AC}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;letter-spacing:0;border:1px solid transparent;
  transition:background-color .22s ease,color .22s ease,border-color .22s ease,transform .18s ease,box-shadow .22s ease;
  white-space:nowrap;
}
.btn .arrow{transition:transform .22s ease}
.btn:hover .arrow{transform:translateX(4px)}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-600);box-shadow:0 8px 20px rgba(14,159,142,.28)}
.btn-ghost{border-color:rgba(20,22,27,.24);color:var(--ink-900);background:transparent}
.btn-ghost:hover{border-color:var(--ink-900);background:rgba(20,22,27,.04)}
.btn-light{background:#fff;color:var(--ink-900)}
.btn-light:hover{background:#F0EFE9}
.btn-sm{height:42px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.btn-text{font-size:15px;font-weight:500;color:var(--text);padding:8px 4px;border-bottom:1px solid transparent;transition:color .2s ease,border-color .2s ease}
.btn-text:hover{color:var(--primary);border-bottom-color:var(--primary)}

.nav-toggle{
  margin-left:auto;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--radius-btn);
  background:#fff;display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
@media (min-width:1024px){.nav-toggle{display:none}}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-900);border-radius:2px;transition:transform .2s ease,opacity .2s ease}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.mobile-drawer{display:none;border-top:1px solid var(--line);background:#fff}
.mobile-drawer.is-open{display:block}
.mobile-drawer .drawer-inner{padding:20px 0 28px}
.drawer-search{position:relative;margin-bottom:18px}
.drawer-search input{width:100%;height:46px;border:1px solid var(--line);border-radius:var(--radius-btn);padding:0 14px 0 38px;outline:none;background:var(--bg)}
.drawer-search input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(14,159,142,.14)}
.drawer-search svg{position:absolute;left:13px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:#9AA0AC}
.drawer-nav{display:flex;flex-direction:column;border-top:1px solid var(--line)}
.drawer-nav a{padding:15px 4px;border-bottom:1px solid var(--line);font-size:16px;font-weight:500;color:var(--text)}
.drawer-nav a.is-active{color:var(--primary);font-weight:700}
.drawer-actions{display:flex;flex-direction:column;gap:12px;margin-top:22px}
@media (min-width:1024px){.mobile-drawer{display:none !important}}

/* ============ Hero ============ */
.hero{position:relative;background:var(--ink-900);color:#fff;overflow:hidden}
.hero-media{position:absolute;inset:0;z-index:0}
.hero-media img{width:100%;height:100%;object-fit:cover;opacity:.34}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(102deg,rgba(11,12,18,.94) 0%,rgba(11,12,18,.82) 42%,rgba(36,30,68,.72) 100%);
}
.hero-grid-dots{
  position:absolute;inset:0;z-index:1;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.55) 1px,transparent 1px);
  background-size:26px 26px;opacity:.06;
}
.hero-inner{position:relative;z-index:2;padding-top:64px;padding-bottom:40px}
@media (min-width:1024px){.hero-inner{padding-top:88px;padding-bottom:56px}}
.hero-copy{max-width:640px}
.hero-tag{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:var(--radius-tag);
  background:rgba(14,159,142,.18);border:1px solid rgba(14,159,142,.5);
  color:#7FE3D6;font-size:13px;font-weight:600;letter-spacing:.02em;margin-bottom:20px;
}
.hero h1{
  color:#fff;
  font-size:clamp(28px,5.4vw,44px);
  line-height:1.16;
  margin-bottom:16px;
}
@media (min-width:1024px){.hero h1{font-size:54px}}
.hero-sub{color:rgba(255,255,255,.78);font-size:17px;margin-bottom:30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.hero .btn-ghost{border-color:rgba(255,255,255,.34);color:#fff}
.hero .btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08)}

.hero-card{
  background:rgba(36,30,68,.62);
  border:1px solid var(--line-dark);
  border-radius:var(--radius-card);
  padding:24px;
  margin-top:34px;
}
@media (min-width:1024px){.hero-card{margin-top:6px}}
.hero-card-title{font-size:13px;letter-spacing:.08em;color:var(--star);font-weight:600;margin-bottom:14px}
.hero-card ul li{
  display:flex;align-items:center;gap:14px;
  padding:13px 0;border-top:1px solid var(--line-dark);
  font-size:15px;color:rgba(255,255,255,.9);
}
.hero-card ul li:first-child{border-top:0;padding-top:0}
.hero-card .idx{font-family:var(--mono);font-size:14px;color:var(--primary);letter-spacing:.04em}

.hero-points{position:relative;z-index:2;padding-bottom:34px}
.hero-points-inner{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px 20px;
  padding-top:22px;border-top:1px solid var(--line-dark);
  color:rgba(255,255,255,.72);font-size:14.5px;
}
.hero-points-inner i{display:inline-block;width:1px;height:14px;background:rgba(255,255,255,.28)}
@media (max-width:639px){.hero-points-inner i{display:none}}

/* ============ 通用板块 ============ */
.section{padding:56px 0}
@media (min-width:640px){.section{padding:72px 0}}
@media (min-width:1024px){.section{padding:104px 0}}
.section-alt{background:var(--bg-alt)}
.section-dark{background:var(--ink-900);color:#fff;position:relative;overflow:hidden}

.section-head{margin-bottom:34px}
@media (min-width:1024px){.section-head{margin-bottom:48px}}
.section-head .eyebrow{
  display:inline-block;font-family:var(--mono);font-size:13px;letter-spacing:.12em;
  color:var(--primary);margin-bottom:12px;
}
.section-head h2{
  font-size:clamp(24px,3.4vw,34px);
  position:relative;display:inline-block;padding-bottom:8px;
}
.section-head h2::after{
  content:"";position:absolute;left:0;bottom:0;width:100%;height:3px;background:var(--primary);
  transform:scaleX(0);transform-origin:left;transition:transform .5s cubic-bezier(.2,.7,.2,1);
}
.section-head.is-visible h2::after{transform:scaleX(1)}
.section-head p{color:var(--text-muted);font-size:16px;margin-top:14px;max-width:720px}
.section-dark .section-head h2,.section-dark h2,.section-dark h3{color:#fff}
.section-dark .section-head p{color:rgba(255,255,255,.7)}

/* ============ 覆盖范围 ============ */
.scope-lead{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);overflow:hidden;transition:transform .5s ease,box-shadow .5s ease;
}
.scope-lead:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.scope-lead .thumb{aspect-ratio:16/10;overflow:hidden}
.scope-lead .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .7s ease}
.scope-lead:hover .thumb img{transform:scale(1.04)}
.scope-lead .body{padding:24px}
.scope-lead h3{font-size:21px;margin-bottom:10px}
.scope-lead p{color:var(--text-muted);font-size:15.5px}

.scope-mini{
  display:flex;gap:16px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:18px;box-shadow:var(--shadow-1);transition:transform .4s ease,box-shadow .4s ease;
}
.scope-mini+.scope-mini{margin-top:20px}
.scope-mini:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.scope-mini .thumb{flex:0 0 108px;aspect-ratio:4/3;border-radius:var(--radius-img);overflow:hidden}
.scope-mini .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .7s ease}
.scope-mini:hover .thumb img{transform:scale(1.05)}
.scope-mini h3{font-size:17px;margin-bottom:6px}
.scope-mini p{color:var(--text-muted);font-size:14.5px;line-height:1.7}

.scope-strip{
  display:flex;flex-wrap:wrap;align-items:center;gap:20px;
  background:var(--secondary);color:#fff;border-radius:var(--radius-card);
  padding:24px;margin-top:24px;
}
.scope-strip .strip-thumb{flex:0 0 96px;aspect-ratio:1/1;border-radius:var(--radius-img);overflow:hidden}
.scope-strip .strip-thumb img{width:100%;height:100%;object-fit:cover}
.scope-strip .strip-body{flex:1 1 260px;min-width:0}
.scope-strip h3{color:#fff;font-size:18px;margin-bottom:6px}
.scope-strip p{color:rgba(255,255,255,.76);font-size:14.5px}
.scope-strip .badge-dark{background:rgba(255,255,255,.14);color:#fff}

/* ============ 步骤 ============ */
.steps{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:640px){.steps{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.steps{grid-template-columns:repeat(3,1fr);gap:24px}}
.step{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px;box-shadow:var(--shadow-1);
}
.step .num{
  font-family:var(--mono);font-size:52px;line-height:1;font-weight:700;
  color:rgba(20,22,27,.10);letter-spacing:-.03em;margin-bottom:14px;
}
.step h3{font-size:18px;margin-bottom:10px}
.step p{color:var(--text-muted);font-size:15px}
.step::after{
  content:"";position:absolute;left:26px;right:26px;bottom:0;height:3px;
  background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform .3s ease;
}
.step:hover::after{transform:scaleX(1)}

/* ============ 内容列表 ============ */
.post-card{
  display:flex;flex-direction:column;height:100%;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform .4s ease,box-shadow .4s ease;
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.post-thumb{display:block;aspect-ratio:16/10;overflow:hidden}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .7s ease}
.post-card:hover .post-thumb img{transform:scale(1.04)}
.post-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1 1 auto}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--radius-tag);
  background:rgba(14,159,142,.12);color:var(--primary-600);
  font-size:12.5px;font-weight:600;letter-spacing:.02em;margin-bottom:12px;align-self:flex-start;
}
.badge-dark{background:rgba(36,30,68,.9);color:#fff}
.badge-accent{background:rgba(255,106,61,.14);color:#D9481C}
.post-title{font-size:18px;line-height:1.45;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-title a:hover{color:var(--primary)}
.post-excerpt{
  color:var(--text-muted);font-size:14.5px;line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{
  display:flex;align-items:center;gap:10px;margin-top:auto;padding-top:18px;
  font-family:var(--mono);font-size:12.5px;color:#8A909C;letter-spacing:.02em;
}
.post-meta .dot{width:3px;height:3px;border-radius:50%;background:#C3C7CF;display:inline-block}

/* ============ FAQ ============ */
.faq-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:8px 26px;box-shadow:var(--shadow-1)}
.accordion{border:0;background:transparent;margin:0}
.accordion-item{border:0;border-top:1px solid var(--line);background:transparent}
.accordion-item:first-child{border-top:0}
.accordion-title{
  position:relative;display:block;border:0;background:transparent;
  padding:22px 46px 22px 22px;font-size:16px;font-weight:600;color:var(--ink-900);line-height:1.6;
  transition:color .2s ease;
}
.accordion-title::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:18px;border-radius:2px;background:var(--primary);
  display:block;
}
.accordion-title::after{
  content:"";position:absolute;right:14px;top:29px;
  width:8px;height:8px;border-right:2px solid var(--primary);border-bottom:2px solid var(--primary);
  transform:rotate(-45deg);transition:transform .25s ease;background:none;
}
.accordion-title[aria-expanded="true"]{color:var(--primary-600)}
.accordion-title[aria-expanded="true"]::after{transform:rotate(45deg)}
.accordion-title:hover{color:var(--primary)}
.accordion-content{border:0 !important;background:transparent !important;padding:0 46px 24px 22px !important}
.accordion-content p{color:var(--text-muted);font-size:15px;line-height:1.85}

/* ============ CTA ============ */
.cta{
  background:var(--ink-900);border-radius:18px;padding:40px 26px;position:relative;overflow:hidden;
  color:#fff;text-align:left;
}
@media (min-width:1024px){.cta{padding:56px 56px}}
.cta::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:24px 24px;opacity:.06;
}
.cta-inner{position:relative;z-index:1;max-width:640px}
.cta h2{color:#fff;font-size:clamp(23px,3.2vw,32px);margin-bottom:14px}
.cta p{color:rgba(255,255,255,.74);font-size:16px;margin-bottom:28px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.cta-note{margin-top:22px;font-size:13.5px;color:rgba(255,255,255,.5)}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.72);position:relative;overflow:hidden;margin-top:0}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.55) 1px,transparent 1px);
  background-size:30px 30px;opacity:.05;
}
.footer-main{position:relative;z-index:1;padding-top:56px;padding-bottom:40px}
@media (min-width:1024px){.footer-main{padding-top:72px;padding-bottom:52px}}
.footer-grid{padding-bottom:0}
.footer-brand{
  display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:17px;letter-spacing:-.02em;
  margin-bottom:14px;
}
.footer-desc{color:rgba(255,255,255,.62);font-size:14.5px;max-width:280px;line-height:1.75}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px;letter-spacing:.01em}
.footer-col ul li{margin-bottom:11px}
.footer-col ul li a{font-size:14.5px;color:rgba(255,255,255,.66);transition:color .2s ease}
.footer-col ul li a:hover{color:var(--primary)}
.footer-col{margin-bottom:34px}
.footer-bottom{
  position:relative;z-index:1;border-top:1px solid var(--line-dark);
  padding:22px 0 30px;display:flex;flex-wrap:wrap;gap:10px 20px;
  justify-content:space-between;font-size:13.5px;color:rgba(255,255,255,.5);
}
.footer-bottom .dot{display:inline-block;width:3px;height:3px;border-radius:50%;background:rgba(255,255,255,.35);margin:0 10px;vertical-align:middle}

/* ============ 入场动效 ============ */
.fade-up{opacity:0;transform:translateY(12px);animation:fadeUp .42s cubic-bezier(.2,.7,.2,1) forwards}
.fade-up.d1{animation-delay:.06s}
.fade-up.d2{animation-delay:.12s}
.fade-up.d3{animation-delay:.18s}
@keyframes fadeUp{to{opacity:1;transform:translateY(0)}}
.reveal{opacity:0;transform:translateY(14px);transition:opacity .5s cubic-bezier(.2,.7,.2,1),transform .5s cubic-bezier(.2,.7,.2,1)}
.reveal.is-visible{opacity:1;transform:translateY(0)}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important;scroll-behavior:auto !important}
  .fade-up,.reveal{opacity:1;transform:none}
  .section-head h2::after{transform:scaleX(1)}
}

/* roulang page: category4 */
/* ============ 设计变量 ============ */
:root{
  --bg:#F7F6F2;
  --bg-alt:#EFEEE8;
  --ink-900:#0B0C12;
  --ink-700:#1A1D26;
  --text:#14161B;
  --text-muted:#5C6270;
  --primary:#0E9F8E;
  --primary-600:#0B8577;
  --secondary:#241E44;
  --accent:#FF6A3D;
  --line:rgba(20,22,27,.10);
  --line-dark:rgba(255,255,255,.14);
  --star:rgba(255,255,255,.72);
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --r-tag:6px;
  --sh-1:0 6px 18px rgba(11,12,18,.06);
  --sh-2:0 14px 28px rgba(11,12,18,.14);
  --mono:'Space Grotesk','JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --sans:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,-apple-system,'Segoe UI',sans-serif;
}

/* ============ 基础 reset ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:16.5px;
  line-height:1.8;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.2;color:var(--ink-900)}
p{margin:0}
input{font-family:inherit}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}

/* ============ 容器 ============ */
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 48px;
}
.container-wide{max-width:1320px}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(247,246,242,.97);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.is-stuck{
  background:#fff;
  border-bottom-color:var(--line);
  box-shadow:0 2px 14px rgba(11,12,18,.05);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:26px;
  height:72px;
  transition:height .22s ease;
}
.site-header.is-stuck .header-inner{height:60px}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--ink-900);
  white-space:nowrap;
  flex:0 0 auto;
}
.brand-icon{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:24px;
  height:24px;
  color:var(--primary);
}
.brand-icon svg{width:24px;height:24px;display:block}

.main-nav{display:flex;align-items:center;gap:26px;margin-left:6px}
.nav-link{
  position:relative;
  display:inline-block;
  padding:6px 0;
  font-size:15px;
  font-weight:500;
  color:var(--text-muted);
  transition:color .22s ease;
}
.nav-link::after{
  content:'';
  position:absolute;
  left:0;
  bottom:0;
  height:2px;
  width:0;
  background:var(--primary);
  transition:width .28s cubic-bezier(.2,.7,.2,1);
}
.nav-link:hover{color:var(--ink-900)}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--ink-900);font-weight:600}
.nav-link.is-active::after{width:100%}

.header-actions{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:14px;
  flex:0 0 auto;
}
.search-box{position:relative}
.search-box input{
  width:224px;
  height:42px;
  padding:0 40px 0 14px;
  font-size:14px;
  color:var(--text);
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-btn);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search-box input::placeholder{color:#9A9FA9}
.search-box input:focus{
  outline:none;
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(14,159,142,.14);
}
.search-box .fa-magnifying-glass{
  position:absolute;
  right:14px;
  top:50%;
  transform:translateY(-50%);
  font-size:14px;
  color:var(--text-muted);
  pointer-events:none;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 22px;
  font-size:15px;
  font-weight:700;
  border:1px solid transparent;
  border-radius:var(--r-btn);
  cursor:pointer;
  transition:background-color .22s ease,color .22s ease,border-color .22s ease,transform .18s ease,box-shadow .22s ease;
  white-space:nowrap;
}
.btn i{font-size:13px;transition:transform .24s ease}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-600);color:#fff}
.btn-primary:hover i{transform:translateX(4px)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;color:var(--ink-900);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--ink-900);background:#fff}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#E85A2E;color:#fff}
.btn-accent:hover i{transform:translateX(4px)}
.btn-light{background:#fff;color:var(--ink-900)}
.btn-light:hover{background:#F0EFEA}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn-text{
  font-size:15px;
  font-weight:600;
  color:var(--ink-900);
  padding:0 2px;
  transition:color .2s ease;
}
.btn-text:hover{color:var(--primary)}

.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:42px;
  height:42px;
  border:1px solid var(--line);
  border-radius:var(--r-btn);
  background:#fff;
  color:var(--ink-900);
  font-size:17px;
  cursor:pointer;
}

/* 移动抽屉 */
.mobile-drawer{
  position:fixed;
  inset:0;
  z-index:90;
  background:rgba(11,12,18,.45);
  opacity:0;
  visibility:hidden;
  transition:opacity .25s ease,visibility .25s ease;
}
.mobile-drawer.is-open{opacity:1;visibility:visible}
.drawer-panel{
  position:absolute;
  top:0;
  right:0;
  width:min(380px,88%);
  height:100%;
  background:#fff;
  padding:24px 22px 40px;
  overflow-y:auto;
  transform:translateX(100%);
  transition:transform .3s cubic-bezier(.2,.7,.2,1);
}
.mobile-drawer.is-open .drawer-panel{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-head span{font-weight:800;font-size:16px}
.drawer-close{
  width:38px;height:38px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:#fff;color:var(--ink-900);
  cursor:pointer;font-size:16px;
}
.drawer-search{position:relative;margin-bottom:22px}
.drawer-search input{
  width:100%;height:46px;padding:0 40px 0 14px;
  border:1px solid var(--line);border-radius:var(--r-btn);background:var(--bg);
  font-size:14.5px;color:var(--text);
}
.drawer-search input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(14,159,142,.14)}
.drawer-search i{position:absolute;right:14px;top:50%;transform:translateY(-50%);color:var(--text-muted);font-size:14px}
.drawer-nav{display:flex;flex-direction:column;border-top:1px solid var(--line)}
.drawer-nav a{
  padding:16px 2px;
  font-size:16px;
  font-weight:600;
  color:var(--ink-700);
  border-bottom:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.drawer-nav a i{font-size:12px;color:var(--text-muted)}
.drawer-nav a.is-active{color:var(--primary)}
.drawer-actions{display:flex;flex-direction:column;gap:12px;margin-top:26px}
.drawer-actions .btn{width:100%}

/* ============ 分类 Hero ============ */
.cat-hero{
  position:relative;
  overflow:hidden;
  background:var(--ink-900);
  color:#fff;
}
.cat-hero .hero-bg{
  position:absolute;
  inset:0;
  background-image:url(/assets/images/backpic/back-3.png);
  background-size:cover;
  background-position:center;
  opacity:.42;
}
.cat-hero .hero-veil{
  position:absolute;
  inset:0;
  background:linear-gradient(115deg,rgba(11,12,18,.90) 0%,rgba(11,12,18,.78) 46%,rgba(36,30,68,.72) 100%);
}
.cat-hero .hero-dots{
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(255,255,255,.55) 1px,transparent 1px);
  background-size:34px 34px;
  opacity:.05;
}
.hero-inner{position:relative;z-index:2;padding:44px 0 72px}
.crumb{
  font-size:14px;
  color:rgba(255,255,255,.62);
  display:flex;
  align-items:center;
  gap:8px;
  flex-wrap:wrap;
}
.crumb a{color:rgba(255,255,255,.62);transition:color .2s ease}
.crumb a:hover{color:#fff}
.crumb .sep{opacity:.5}
.crumb .current{color:var(--star)}

.hero-grid{padding-top:46px}
.hero-kicker{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--mono);
  font-size:13px;
  letter-spacing:.06em;
  color:var(--star);
}
.hero-kicker::before{
  content:'';
  width:28px;
  height:1px;
  background:var(--primary);
  display:inline-block;
}
.cat-hero h1{
  margin:18px 0 18px;
  font-size:clamp(30px,5vw,60px);
  line-height:1.14;
  font-weight:900;
  letter-spacing:-.025em;
  color:#fff;
  max-width:14em;
}
.hero-sub{
  font-size:17px;
  line-height:1.8;
  color:rgba(255,255,255,.80);
  max-width:32em;
}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:32px}

.hero-side{
  background:var(--secondary);
  border:1px solid var(--line-dark);
  border-radius:var(--r-card);
  padding:24px;
}
.hero-side h3{
  color:#fff;
  font-size:15px;
  letter-spacing:.02em;
  margin-bottom:6px;
}
.hero-side .side-note{
  font-family:var(--mono);
  font-size:12.5px;
  color:rgba(255,255,255,.55);
  margin-bottom:16px;
}
.side-item{
  display:flex;
  gap:14px;
  padding:14px 0;
  border-top:1px solid var(--line-dark);
  transition:transform .25s ease;
}
.side-item:hover{transform:translateX(4px)}
.side-item .d{
  font-family:var(--mono);
  font-size:12.5px;
  color:var(--star);
  flex:0 0 auto;
  padding-top:2px;
}
.side-item .t{font-size:14.5px;color:rgba(255,255,255,.88);line-height:1.65}
.side-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:16px;
  font-size:14px;
  font-weight:700;
  color:var(--primary);
}
.side-link i{font-size:12px;transition:transform .22s ease}
.side-link:hover i{transform:translateX(4px)}

.hero-status{
  position:relative;
  z-index:2;
  display:flex;
  flex-wrap:wrap;
  gap:0;
  margin-top:56px;
  padding-top:24px;
  border-top:1px solid var(--line-dark);
}
.status-item{
  padding-right:34px;
  margin-right:34px;
  border-right:1px solid var(--line-dark);
}
.status-item:last-child{border-right:0;margin-right:0;padding-right:0}
.status-item .k{
  display:block;
  font-family:var(--mono);
  font-size:12.5px;
  color:rgba(255,255,255,.55);
  letter-spacing:.04em;
}
.status-item .v{
  display:block;
  margin-top:4px;
  font-size:15.5px;
  font-weight:700;
  color:#fff;
}

/* ============ 通用板块 ============ */
.section{padding:100px 0}
.section-alt{background:var(--bg-alt)}
.section-tight{padding:72px 0}
.section-dark{
  position:relative;
  overflow:hidden;
  background:var(--ink-900);
  color:#fff;
}
.section-dark .dots{
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:32px 32px;
  opacity:.05;
}
.section-dark .container{position:relative;z-index:2}

.section-head{margin-bottom:46px;max-width:780px}
.eyebrow{
  display:block;
  font-family:var(--mono);
  font-size:13px;
  letter-spacing:.06em;
  color:var(--primary);
  margin-bottom:10px;
}
.h-sec{
  position:relative;
  display:inline-block;
  font-size:clamp(24px,3.2vw,34px);
  font-weight:800;
  line-height:1.28;
}
.h-sec::after{
  content:'';
  position:absolute;
  left:0;
  bottom:-10px;
  height:3px;
  width:0;
  background:var(--primary);
  transition:width .6s cubic-bezier(.2,.7,.2,1);
}
.h-sec.in-view::after{width:100%}
.section-lead{
  margin-top:26px;
  font-size:16px;
  color:var(--text-muted);
  max-width:46em;
}
.section-dark .section-lead{color:rgba(255,255,255,.74)}
.section-dark .h-sec{color:#fff}

/* 入场动效 */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .42s cubic-bezier(.2,.7,.2,1),transform .42s cubic-bezier(.2,.7,.2,1);
}
.reveal.in-view{opacity:1;transform:none}

/* ============ 覆盖范围（不对称 7/5） ============ */
.scope-main{
  display:block;
  height:100%;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .35s cubic-bezier(.2,.7,.2,1),box-shadow .35s ease;
}
.scope-main:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.scope-media{overflow:hidden}
.scope-media img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  transition:transform .7s cubic-bezier(.2,.7,.2,1);
}
.scope-main:hover .scope-media img{transform:scale(1.04)}
.scope-body{padding:28px}
.scope-body h3{font-size:21px;margin:14px 0 12px}
.scope-body p{font-size:15.5px;color:var(--text-muted)}
.scope-foot{
  display:flex;
  align-items:center;
  gap:10px;
  margin-top:20px;
  font-size:14px;
  font-weight:700;
  color:var(--primary);
}
.scope-foot i{font-size:12px;transition:transform .22s ease}
.scope-main:hover .scope-foot i{transform:translateX(4px)}

.scope-list{border-top:1px solid var(--line)}
.scope-row{
  display:flex;
  gap:18px;
  padding:22px 0;
  border-bottom:1px solid var(--line);
  transition:transform .28s ease;
}
.scope-row:hover{transform:translateX(6px)}
.scope-num{
  flex:0 0 auto;
  width:44px;
  font-family:var(--mono);
  font-size:20px;
  font-weight:700;
  color:var(--primary);
  line-height:1.4;
}
.scope-row h4{font-size:16.5px;margin-bottom:6px}
.scope-row p{font-size:14.8px;color:var(--text-muted);line-height:1.75}

/* ============ 标签 ============ */
.tag{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 10px;
  border-radius:var(--r-tag);
  font-size:12.5px;
  font-weight:700;
  background:rgba(36,30,68,.08);
  color:var(--secondary);
  white-space:nowrap;
}
.tag-accent{background:rgba(255,106,61,.14);color:#C6421A}
.tag-line{background:transparent;border:1px solid var(--line-dark);color:rgba(255,255,255,.8)}

/* ============ 行式公告列表 ============ */
.news-list{border-top:1px solid var(--line)}
.news-item{
  display:grid;
  grid-template-columns:70px 1fr 46px;
  gap:24px;
  align-items:start;
  padding:28px 0;
  border-bottom:1px solid var(--line);
  transition:transform .3s cubic-bezier(.2,.7,.2,1),background-color .3s ease;
}
.news-item:hover{transform:translateX(6px)}
.news-index{
  font-family:var(--mono);
  font-size:15px;
  font-weight:700;
  color:var(--text-muted);
  padding-top:5px;
  letter-spacing:.02em;
}
.news-title{
  font-size:19px;
  font-weight:800;
  letter-spacing:-.01em;
  margin-bottom:8px;
  transition:color .25s ease;
}
.news-item:hover .news-title{color:var(--primary)}
.news-desc{font-size:15.5px;color:var(--text-muted);line-height:1.8}
.news-meta{
  display:flex;
  align-items:center;
  gap:14px;
  flex-wrap:wrap;
  margin-top:14px;
  font-family:var(--mono);
  font-size:12.5px;
  color:var(--text-muted);
}
.news-arrow{
  justify-self:end;
  width:42px;
  height:42px;
  border-radius:999px;
  border:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--text-muted);
  font-size:13px;
  transition:background-color .28s ease,border-color .28s ease,color .28s ease,transform .28s ease;
}
.news-item:hover .news-arrow{
  background:var(--primary);
  border-color:var(--primary);
  color:#fff;
  transform:translateX(4px);
}

/* ============ 四步顺序 ============ */
.steps{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:0;
  border-top:1px solid var(--line);
  margin-top:10px;
}
.step{
  padding:28px 26px 8px 0;
  border-right:1px solid var(--line);
}
.step:last-child{border-right:0}
.step-num{
  font-family:var(--mono);
  font-size:15px;
  font-weight:700;
  color:var(--primary);
  letter-spacing:.06em;
}
.step h3{font-size:17px;margin:14px 0 10px}
.step p{font-size:14.8px;color:var(--text-muted);line-height:1.78}

/* ============ FAQ ============ */
.faq-wrap{max-width:900px}
.custom-faq{background:transparent;border:0;margin:0}
.custom-faq .accordion-item{border:0;border-top:1px solid var(--line)}
.custom-faq .accordion-item:last-child{border-bottom:1px solid var(--line)}
.custom-faq .accordion-title{
  position:relative;
  display:block;
  padding:24px 56px 24px 26px;
  font-size:16px;
  font-weight:700;
  color:var(--ink-900);
  background:transparent;
  border:0;
  line-height:1.6;
  transition:color .22s ease,background-color .22s ease;
}
.custom-faq .accordion-title:hover{color:var(--primary)}
.custom-faq .accordion-title::after{
  content:'';
  position:absolute;
  left:0;
  top:50%;
  transform:translateY(-50%);
  width:3px;
  height:20px;
  background:var(--primary);
}
.custom-faq .accordion-title::before{
  content:'';
  position:absolute;
  right:26px;
  top:50%;
  width:10px;
  height:10px;
  border-right:2px solid var(--text-muted);
  border-bottom:2px solid var(--text-muted);
  transform:translateY(-70%) rotate(45deg);
  transition:transform .25s ease,border-color .25s ease;
}
.custom-faq .accordion-title:hover::before{border-color:var(--primary)}
.custom-faq .accordion-title[aria-expanded="true"]{color:var(--primary)}
.custom-faq .accordion-title[aria-expanded="true"]::before{
  transform:translateY(-30%) rotate(225deg);
  border-color:var(--primary);
}
.custom-faq .accordion-content{
  padding:0 56px 26px 26px;
  font-size:15.5px;
  line-height:1.85;
  color:var(--text-muted);
  background:transparent;
  border:0;
}
.custom-faq .accordion-content p{margin:0}

/* ============ CTA ============ */
.cta-band{
  position:relative;
  overflow:hidden;
  background:var(--ink-900);
  color:#fff;
  padding:96px 0;
}
.cta-band .dots{
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:30px 30px;
  opacity:.06;
}
.cta-inner{position:relative;z-index:2;max-width:760px}
.cta-band h2{
  color:#fff;
  font-size:clamp(26px,3.6vw,40px);
  line-height:1.25;
}
.cta-band p{
  margin-top:18px;
  font-size:16px;
  color:rgba(255,255,255,.76);
  max-width:38em;
}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:32px}
.cta-note{
  margin-top:24px;
  font-family:var(--mono);
  font-size:13px;
  color:rgba(255,255,255,.55);
}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;
  overflow:hidden;
  background:var(--ink-900);
  color:rgba(255,255,255,.72);
  padding:76px 0 28px;
}
.site-footer .dots{
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:30px 30px;
  opacity:.05;
}
.site-footer .container{position:relative;z-index:2}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:40px;
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  color:#fff;
  font-size:17px;
  font-weight:800;
  letter-spacing:-.01em;
}
.footer-brand .brand-icon{color:var(--primary)}
.footer-desc{
  margin-top:16px;
  font-size:14.5px;
  line-height:1.8;
  color:rgba(255,255,255,.62);
  max-width:22em;
}
.footer-col h4{
  color:#fff;
  font-size:15px;
  margin-bottom:18px;
  letter-spacing:0;
}
.footer-col li{margin-bottom:12px}
.footer-col a{
  font-size:14.5px;
  color:rgba(255,255,255,.66);
  transition:color .2s ease;
}
.footer-col a:hover{color:#fff}
.footer-bottom{
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  margin-top:56px;
  padding-top:22px;
  border-top:1px solid var(--line-dark);
  font-size:13px;
  color:rgba(255,255,255,.52);
}
.footer-bottom .dot{
  display:inline-block;
  width:4px;
  height:4px;
  border-radius:50%;
  background:rgba(255,255,255,.4);
  margin:0 8px;
  vertical-align:middle;
}

/* ============ 响应式 ============ */
@media (max-width:1180px){
  .container{padding:0 32px}
  .search-box input{width:180px}
  .main-nav{gap:20px}
}

@media (max-width:1023px){
  .main-nav{display:none}
  .search-box{display:none}
  .header-actions .btn-text{display:none}
  .nav-toggle{display:inline-flex}
  .section{padding:72px 0}
  .hero-inner{padding:32px 0 56px}
  .hero-grid{padding-top:34px}
  .hero-side{margin-top:32px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .step{padding:24px 22px 20px 0}
  .step:nth-child(2){border-right:0}
  .step:nth-child(3),
  .step:nth-child(4){border-top:1px solid var(--line)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
}

@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 20px}
  .header-inner{height:64px}
  .brand{font-size:15.5px}
  .cat-hero h1{font-size:clamp(28px,8vw,38px)}
  .hero-sub{font-size:16px}
  .hero-status{gap:20px 0;margin-top:38px}
  .status-item{padding-right:22px;margin-right:22px}
  .status-item .v{font-size:14.5px}
  .section{padding:56px 0}
  .section-head{margin-bottom:32px}
  .news-item{
    grid-template-columns:1fr;
    gap:10px;
    padding:24px 0;
  }
  .news-index{padding-top:0;font-size:13.5px;color:var(--primary)}
  .news-arrow{display:none}
  .news-title{font-size:17.5px}
  .scope-body{padding:22px}
  .steps{grid-template-columns:1fr}
  .step{border-right:0;border-top:1px solid var(--line);padding:22px 0 18px}
  .step:first-child{border-top:0}
  .step:nth-child(3),
  .step:nth-child(4){border-top:1px solid var(--line)}
  .custom-faq .accordion-title{padding:20px 46px 20px 20px;font-size:15.5px}
  .custom-faq .accordion-title::before{right:20px}
  .custom-faq .accordion-content{padding:0 46px 22px 20px}
  .cta-band{padding:60px 0}
  .footer-grid{grid-template-columns:1fr;gap:34px}
  .site-footer{padding:56px 0 24px}
  .footer-bottom{margin-top:36px;font-size:12.5px}
}

@media (max-width:520px){
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .cta-actions{flex-direction:column;align-items:stretch}
  .cta-actions .btn{width:100%}
  .status-item{border-right:0;padding-right:0;margin-right:0;width:48%}
  .hero-status{gap:20px 4%}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1!important;transform:none!important}
  .h-sec::after{width:100%!important}
}