/* roulang page: index */
:root{
  --ink:#0E1230; --ink-2:#1A1F45; --teal:#2FBFAE; --teal-deep:#24A796; --teal-soft:#E6F7F4;
  --violet:#7C6BF2; --paper:#F7F7F5; --card:#FFFFFF; --night:#0B0F26;
  --t1:#12142B; --t2:#4B5069; --t3:#8A90A6;
  --line:#E7E8EF; --divide:#EFF0F5;
  --radius-card:14px; --radius-btn:10px;
  --shadow-1:0 1px 2px rgba(14,18,48,.04);
  --shadow-2:0 14px 34px -20px rgba(14,18,48,.22);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:var(--paper);color:var(--t1);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4{font-family:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;margin:0;font-weight:600;letter-spacing:-.01em;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--violet);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;}
@media (min-width:768px){.container{padding:0 24px;}}
.section{padding:56px 0;}
@media (min-width:768px){.section{padding:96px 0;}}
.eyebrow{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--teal);font-weight:600;}
.section-title{font-size:clamp(22px,2.6vw,34px);line-height:1.25;color:var(--t1);}
.section-sub{color:var(--t2);font-size:15px;margin-top:10px;max-width:620px;}
.h2-bar{position:relative;padding-left:16px;}
.h2-bar::before{content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:2px;background:var(--teal);}

/* 导航 */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);transition:box-shadow .25s ease,padding .25s ease;}
.site-header.is-scrolled{box-shadow:0 6px 24px -18px rgba(14,18,48,.45);}
.topline{display:flex;align-items:center;gap:18px;height:64px;transition:height .25s ease;}
.site-header.is-scrolled .topline{height:56px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(150deg,var(--ink),var(--ink-2));display:flex;align-items:center;justify-content:center;color:#fff;font-size:15px;font-weight:700;font-family:"Noto Serif SC",serif;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{font-family:"Noto Serif SC",serif;font-size:17px;font-weight:700;color:var(--ink);letter-spacing:.01em;}
.brand-sub{font-size:11px;color:var(--t3);letter-spacing:.12em;}
.main-nav{display:none;align-items:center;gap:26px;margin-left:14px;}
@media (min-width:1024px){.main-nav{display:flex;}}
.main-nav a{font-size:14px;letter-spacing:.04em;color:var(--t2);padding:6px 0;position:relative;transition:color .2s ease;}
.main-nav a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--teal);transform:scaleX(0);transform-origin:left;transition:transform .22s ease;}
.main-nav a:hover{color:var(--ink);}
.main-nav a:hover::after,.main-nav a[aria-current="page"]::after{transform:scaleX(1);}
.main-nav a[aria-current="page"]{color:var(--ink);font-weight:600;}
.header-tools{margin-left:auto;display:flex;align-items:center;gap:10px;}
.search-form{position:relative;display:none;}
@media (min-width:768px){.search-form{display:block;}}
.search-input{width:230px;height:40px;border:1px solid var(--line);border-radius:var(--radius-btn);background:#fff;padding:0 14px 0 38px;font-size:14px;color:var(--t1);transition:border-color .2s ease,box-shadow .2s ease,width .25s ease;}
.search-input::placeholder{color:var(--t3);}
.search-input:focus{outline:none;border-color:var(--teal);box-shadow:0 0 0 3px rgba(47,191,174,.14);width:268px;}
.search-icon{position:absolute;left:13px;top:50%;transform:translateY(-50%);color:var(--t3);font-size:13px;}
.icon-btn{width:44px;height:44px;border:1px solid var(--line);border-radius:var(--radius-btn);background:#fff;color:var(--t2);display:none;align-items:center;justify-content:center;cursor:pointer;transition:color .2s ease,border-color .2s ease,background .2s ease;}
.icon-btn:hover{color:var(--teal-deep);border-color:var(--teal);background:var(--teal-soft);}
@media (min-width:1024px){.icon-btn{display:flex;}}
.burger{width:44px;height:44px;border:1px solid var(--line);border-radius:var(--radius-btn);background:#fff;color:var(--ink);display:flex;align-items:center;justify-content:center;cursor:pointer;}
@media (min-width:1024px){.burger{display:none;}}

.channel-bar{display:none;border-top:1px solid var(--divide);}
@media (min-width:1024px){.channel-bar{display:block;}}
.channel-inner{display:flex;align-items:center;gap:22px;height:40px;overflow-x:auto;scrollbar-width:none;}
.channel-inner::-webkit-scrollbar{display:none;}
.channel-inner a{font-size:13px;letter-spacing:.05em;color:var(--t2);white-space:nowrap;transition:color .2s ease;}
.channel-inner a:hover{color:var(--teal-deep);}
.channel-inner a.active{color:var(--ink);font-weight:600;box-shadow:inset 0 -2px 0 var(--teal);}
.hot-row{display:flex;align-items:center;gap:8px;margin-left:auto;}
.hot-label{font-size:12px;color:var(--t3);letter-spacing:.1em;}
.hot-chip{font-size:12px;padding:4px 10px;border-radius:6px;background:var(--teal-soft);color:var(--ink-2);white-space:nowrap;transition:background .2s ease;}
.hot-chip:hover{background:#d5f2ec;}

/* 移动抽屉 */
.drawer-mask{position:fixed;inset:0;background:rgba(11,15,38,.5);opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease;z-index:70;}
.drawer-mask.open{opacity:1;visibility:visible;}
.drawer{position:fixed;top:0;right:0;bottom:0;width:82%;max-width:340px;background:#fff;z-index:80;transform:translateX(100%);transition:transform .24s ease;padding:20px;overflow-y:auto;}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.drawer-group{margin-bottom:22px;}
.drawer-group h3{font-size:12px;letter-spacing:.14em;color:var(--t3);text-transform:uppercase;margin-bottom:10px;font-family:inherit;font-weight:600;}
.drawer-group a{display:block;padding:12px 0;font-size:15px;color:var(--t1);border-bottom:1px solid var(--divide);}
.drawer-group a.active{color:var(--teal-deep);font-weight:600;}
.drawer-close{width:44px;height:44px;border:1px solid var(--line);border-radius:var(--radius-btn);background:#fff;cursor:pointer;color:var(--ink);}
.drawer-search{width:100%;height:44px;border:1px solid var(--line);border-radius:var(--radius-btn);padding:0 14px;}
.drawer-search:focus{outline:none;border-color:var(--teal);}

/* Hero */
.hero{position:relative;background:var(--night) url('/assets/images/backpic/back-1.webp') center/cover no-repeat;overflow:hidden;}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(14,18,48,.92) 0%,rgba(11,15,38,.82) 48%,rgba(11,15,38,.68) 100%);}
.hero::after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.16) 1px,transparent 1px);background-size:34px 34px;opacity:.35;pointer-events:none;}
.hero-inner{position:relative;z-index:2;min-height:470px;display:flex;align-items:center;padding:64px 0;}
@media (min-width:768px){.hero-inner{min-height:580px;padding:80px 0;}}
.hero-copy{max-width:660px;}
.hero-eyebrow{color:#8FE3D8;font-size:12px;letter-spacing:.14em;text-transform:uppercase;font-weight:600;}
.hero h1{font-size:clamp(30px,4.4vw,54px);line-height:1.15;letter-spacing:-.02em;color:#fff;margin-top:16px;}
.hero-sub{color:rgba(255,255,255,.78);font-size:16px;margin-top:18px;max-width:520px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:var(--radius-btn);font-size:15px;line-height:1.4;cursor:pointer;border:1px solid transparent;transition:background .2s ease,color .2s ease,border-color .2s ease,transform .18s ease,box-shadow .2s ease;min-height:44px;}
.btn-primary{background:var(--teal);color:#062E29;font-weight:600;}
.btn-primary:hover{background:#3FD1BF;transform:translateY(-2px);box-shadow:0 12px 26px -14px rgba(47,191,174,.7);}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5);}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;transform:translateY(-2px);}
.btn-ink{background:var(--ink);color:#fff;font-weight:600;}
.btn-ink:hover{background:var(--ink-2);transform:translateY(-2px);box-shadow:var(--shadow-2);}
.btn-outline{background:#fff;color:var(--ink);border-color:var(--line);}
.btn-outline:hover{border-color:var(--teal);color:var(--teal-deep);transform:translateY(-2px);}
.btn-sm{padding:9px 16px;font-size:14px;}
.hero-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-top:38px;padding-top:26px;border-top:1px solid rgba(255,255,255,.16);max-width:560px;}
.hero-stat b{display:block;font-family:"Noto Serif SC",serif;font-size:clamp(22px,2.6vw,30px);color:#fff;font-variant-numeric:tabular-nums;line-height:1.2;}
.hero-stat span{display:block;font-size:13px;color:rgba(255,255,255,.66);margin-top:4px;}
.hero-note{margin-top:22px;font-size:13px;color:rgba(255,255,255,.6);}

/* 目录 */
.dir-grid{display:grid;grid-template-columns:1fr;gap:0 48px;margin-top:34px;}
@media (min-width:1024px){.dir-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
.dir-row{display:flex;align-items:flex-start;gap:18px;padding:22px 4px;border-top:1px solid var(--divide);transition:background .2s ease;}
.dir-row:hover{background:#FBFCFD;}
.dir-row:hover .dir-num{color:var(--teal);transform:translateX(4px);}
.dir-num{font-family:"Noto Serif SC",serif;font-size:26px;color:var(--t3);width:44px;flex-shrink:0;font-variant-numeric:tabular-nums;transition:color .2s ease,transform .2s ease;}
.dir-body{flex:1;min-width:0;}
.dir-name{font-size:17px;font-weight:600;color:var(--ink);display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.dir-count{font-size:12px;color:var(--t3);font-weight:400;padding:2px 8px;border:1px solid var(--line);border-radius:6px;background:#fff;}
.dir-desc{color:var(--t2);font-size:14px;margin-top:6px;}
.dir-arrow{color:var(--t3);flex-shrink:0;margin-top:6px;transition:color .2s ease,transform .2s ease;}
.dir-row:hover .dir-arrow{color:var(--teal);transform:translateX(4px);}

/* 卡片 */
.card-grid{display:grid;grid-template-columns:1fr;gap:22px;margin-top:34px;}
@media (min-width:768px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.card-grid{grid-template-columns:repeat(3,minmax(0,1fr));}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-1);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;display:flex;flex-direction:column;}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#DCE9E7;}
.card-cover{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--ink);}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.card:hover .card-cover img{transform:scale(1.03);}
.card-cover .fallback{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.5);font-family:"Noto Serif SC",serif;font-size:38px;}
.card-body{padding:20px;display:flex;flex-direction:column;flex:1;}
.card-title{font-size:18px;line-height:1.5;color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-desc{color:var(--t2);font-size:14px;margin-top:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:auto;padding-top:16px;}
.tag{font-size:12px;padding:4px 10px;border-radius:6px;background:var(--teal-soft);color:var(--ink-2);letter-spacing:.02em;}
.date{font-size:13px;color:var(--t3);font-variant-numeric:tabular-nums;}

/* 最新信息列表 */
.news-list{margin-top:30px;border-top:1px solid var(--divide);}
.news-row{display:block;padding:20px 6px;border-bottom:1px solid var(--divide);transition:background .2s ease;}
.news-row:hover{background:#F7F8FB;}
.news-row:hover .news-title{color:var(--teal-deep);}
.news-row:hover .news-arrow{color:var(--teal);transform:translateX(4px);}
.news-top{display:flex;align-items:center;gap:12px;flex-wrap:wrap;}
.news-date{font-size:13px;color:var(--t3);font-variant-numeric:tabular-nums;letter-spacing:.02em;}
.news-title{font-size:17px;font-weight:600;color:var(--ink);transition:color .2s ease;}
.news-desc{color:var(--t2);font-size:14px;margin-top:8px;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;}
.news-inner{display:flex;align-items:center;gap:16px;}
.news-main{flex:1;min-width:0;}
.news-arrow{color:var(--t3);flex-shrink:0;transition:color .2s ease,transform .2s ease;}
.empty-state{padding:56px 20px;text-align:center;border:1px dashed var(--line);border-radius:var(--radius-card);background:#fff;margin-top:26px;}
.empty-state p{color:var(--t2);margin-top:14px;}
.empty-icon{width:46px;height:46px;margin:0 auto;border-radius:12px;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--t3);background:var(--paper);}

/* 相关推荐 */
.mini-grid{display:grid;grid-template-columns:1fr;gap:18px;margin-top:28px;}
@media (min-width:520px){.mini-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.mini-grid{grid-template-columns:repeat(4,minmax(0,1fr));}}
.mini-card{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:transform .22s ease,box-shadow .22s ease;}
.mini-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.mini-cover{aspect-ratio:16/9;background:var(--ink);overflow:hidden;}
.mini-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.mini-card:hover .mini-cover img{transform:scale(1.03);}
.mini-body{padding:14px 16px 18px;}
.mini-title{font-size:15px;color:var(--ink);line-height:1.55;font-weight:600;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.mini-meta{font-size:12px;color:var(--t3);margin-top:8px;}

/* FAQ */
.faq-wrap{margin-top:30px;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;background:#fff;}
.faq-item + .faq-item{border-top:1px solid var(--divide);}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 22px;background:#fff;border:0;text-align:left;cursor:pointer;font-size:16px;font-weight:600;color:var(--ink);transition:background .2s ease;}
.faq-q:hover{background:#FAFBFB;}
.faq-sign{flex-shrink:0;width:26px;height:26px;border-radius:8px;background:var(--teal-soft);color:var(--teal-deep);display:flex;align-items:center;justify-content:center;font-size:16px;line-height:1;transition:transform .25s ease;}
.faq-item.open .faq-sign{transform:rotate(180deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq-a p{padding:0 22px 20px;color:var(--t2);font-size:15px;}

/* CTA */
.cta-band{background:var(--night);position:relative;overflow:hidden;}
.cta-band::after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.13) 1px,transparent 1px);background-size:30px 30px;opacity:.4;}
.cta-inner{position:relative;z-index:2;padding:44px 0;display:flex;flex-direction:column;gap:24px;}
@media (min-width:768px){.cta-inner{flex-direction:row;align-items:center;justify-content:space-between;padding:52px 0;}}
.cta-inner h2{color:#fff;font-size:clamp(20px,2.3vw,28px);line-height:1.35;}
.cta-inner p{color:rgba(255,255,255,.7);margin-top:8px;font-size:15px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;}
.circle-btn{width:44px;height:44px;border-radius:50%;border:1px solid rgba(255,255,255,.35);background:transparent;color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background .2s ease,border-color .2s ease;}
.circle-btn:hover{background:rgba(255,255,255,.14);border-color:#fff;}

/* 页脚 */
.site-footer{background:#fff;border-top:1px solid var(--line);}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;padding:56px 0 40px;}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;}}
.footer-title{font-size:13px;letter-spacing:.12em;color:var(--t3);text-transform:uppercase;margin-bottom:16px;font-weight:600;}
.footer-links a{display:block;padding:7px 0;color:var(--t2);font-size:14px;transition:color .2s ease;}
.footer-links a:hover{color:var(--teal-deep);}
.footer-about{color:var(--t2);font-size:14px;margin-top:14px;max-width:320px;}
.footer-bottom{border-top:1px solid var(--divide);padding:20px 0;display:flex;flex-direction:column;gap:8px;font-size:13px;color:var(--t3);}
@media (min-width:768px){.footer-bottom{flex-direction:row;align-items:center;justify-content:space-between;}}

/* 返回顶部 */
.to-top{position:fixed;right:20px;bottom:24px;width:46px;height:46px;border-radius:12px;background:var(--ink);color:#fff;border:0;display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .25s ease,transform .25s ease,visibility .25s ease;z-index:50;}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--ink-2);}

/* 进场动效 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s ease,transform .6s ease;}
.reveal.visible{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
  .card:hover,.mini-card:hover,.btn:hover{transform:none;}
}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--teal-deep);font-size:14px;font-weight:600;}
.link-arrow:hover .arr{transform:translateX(4px);}
.link-arrow .arr{transition:transform .2s ease;}

/* roulang page: article */
:root{
  --ink:#0E1230;
  --ink-2:#1A1F45;
  --teal:#2FBFAE;
  --teal-hover:#24A796;
  --teal-soft:#E6F7F4;
  --violet:#7C6BF2;
  --paper:#F7F7F5;
  --card:#FFFFFF;
  --night:#0B0F26;
  --t1:#12142B;
  --t2:#4B5069;
  --t3:#8A90A6;
  --line:#E7E8EF;
  --divider:#EFF0F5;
  --sh-1:0 1px 2px rgba(14,18,48,.04);
  --sh-2:0 14px 34px -20px rgba(14,18,48,.22);
  --r-card:14px;
  --r-btn:10px;
  --r-tag:6px;
  --r-img:12px;
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--t1);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .18s ease;}
button,input{font-family:inherit;font-size:inherit;}
button{cursor:pointer;border:none;background:none;color:inherit;}
h1,h2,h3,h4,p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--violet);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:768px){.container{padding:0 24px;}}

/* ============ 阅读进度条 ============ */
.read-progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--violet);z-index:120;transition:width .12s linear;}

/* ============ 顶部导航 ============ */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);transition:box-shadow .2s ease;}
.site-header.is-stuck{box-shadow:0 6px 20px -16px rgba(14,18,48,.4);}
.topline{display:flex;align-items:center;gap:20px;min-height:64px;}
.site-header.is-stuck .topline{min-height:56px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{width:36px;height:36px;border-radius:10px;background:var(--ink);color:#fff;font-family:var(--font-serif);font-size:18px;display:flex;align-items:center;justify-content:center;letter-spacing:0;}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-name{font-family:var(--font-serif);font-size:16px;letter-spacing:.02em;color:var(--ink);}
.brand-sub{font-size:11px;letter-spacing:.14em;color:var(--t3);}
.main-nav{display:none;align-items:center;gap:26px;margin-left:8px;}
.main-nav a{position:relative;font-size:14px;letter-spacing:.06em;color:var(--t2);padding:6px 0;}
.main-nav a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--teal);transform:scaleX(0);transform-origin:left;transition:transform .2s ease;}
.main-nav a:hover{color:var(--ink);}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a[aria-current="page"]{color:var(--ink);font-weight:600;}
.main-nav a[aria-current="page"]::after{transform:scaleX(1);}
.header-tools{display:flex;align-items:center;gap:10px;margin-left:auto;}
.search-form{display:none;align-items:center;gap:8px;height:40px;padding:0 14px;border:1px solid var(--line);border-radius:var(--r-btn);background:#fff;transition:border-color .18s ease;}
.search-form:focus-within{border-color:var(--teal);}
.search-icon{color:var(--t3);font-size:15px;}
.search-input{border:none;outline:none;background:transparent;width:190px;font-size:13.5px;color:var(--t1);}
.search-input::placeholder{color:var(--t3);}
.icon-btn{width:40px;height:40px;border-radius:var(--r-btn);border:1px solid var(--line);background:#fff;color:var(--t2);font-size:17px;display:flex;align-items:center;justify-content:center;transition:all .18s ease;}
.icon-btn:hover{border-color:var(--teal);color:var(--teal);}
.burger{width:44px;height:44px;border-radius:var(--r-btn);border:1px solid var(--line);background:#fff;display:flex;align-items:center;justify-content:center;color:var(--ink);}
@media (min-width:1024px){
  .main-nav{display:flex;}
  .burger{display:none;}
  .search-form{display:flex;}
}
.channel-bar{border-top:1px solid var(--divider);background:rgba(255,255,255,.75);}
.channel-inner{display:flex;align-items:center;gap:18px;min-height:38px;overflow-x:auto;scrollbar-width:none;}
.channel-inner::-webkit-scrollbar{display:none;}
.channel-inner > a{position:relative;font-size:13px;letter-spacing:.06em;color:var(--t2);white-space:nowrap;padding:8px 0;}
.channel-inner > a.active{color:var(--ink);font-weight:600;}
.channel-inner > a.active::after{content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;background:var(--teal);}
.hot-row{display:flex;align-items:center;gap:8px;margin-left:auto;padding:6px 0;white-space:nowrap;}
.hot-label{font-size:11.5px;letter-spacing:.14em;color:var(--t3);}
.hot-chip{display:inline-block;padding:3px 10px;border-radius:999px;background:var(--teal-soft);color:var(--ink-2);font-size:12px;letter-spacing:.04em;}
.hot-chip:hover{background:var(--teal);color:#fff;}
@media (max-width:1023px){.hot-row{display:none;}}

/* 移动抽屉 */
.drawer-mask{position:fixed;inset:0;background:rgba(11,15,38,.45);opacity:0;pointer-events:none;transition:opacity .24s ease;z-index:130;}
.drawer-mask.open{opacity:1;pointer-events:auto;}
.drawer{position:fixed;top:0;right:0;width:290px;max-width:86vw;height:100%;background:#fff;z-index:140;transform:translateX(100%);transition:transform .24s ease;padding:22px 20px;overflow-y:auto;display:flex;flex-direction:column;gap:22px;}
.drawer.open{transform:translateX(0);}
.drawer .drawer-title{font-size:12px;letter-spacing:.14em;color:var(--t3);}
.drawer .drawer-links{display:flex;flex-direction:column;}
.drawer .drawer-links a{padding:12px 0;border-bottom:1px solid var(--divider);font-size:15px;color:var(--t1);}
.drawer .drawer-links a:hover{color:var(--teal);}
.drawer-close{align-self:flex-end;width:40px;height:40px;border-radius:var(--r-btn);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--t2);}
.drawer-search{height:44px;border:1px solid var(--line);border-radius:var(--r-btn);padding:0 14px;width:100%;outline:none;font-size:14px;}
.drawer-search:focus{border-color:var(--teal);}

/* ============ 文章页头 ============ */
.article-hero{position:relative;background:var(--night);color:#fff;overflow:hidden;}
.article-hero::before{content:"";position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.png');background-size:cover;background-position:center;opacity:.32;}
.article-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(11,15,38,.94) 0%,rgba(14,18,48,.78) 55%,rgba(11,15,38,.86) 100%);}
.article-hero .container{position:relative;z-index:2;padding-top:44px;padding-bottom:44px;}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.06em;color:rgba(255,255,255,.62);margin-bottom:18px;flex-wrap:wrap;}
.breadcrumb a{color:rgba(255,255,255,.72);}
.breadcrumb a:hover{color:var(--teal);}
.breadcrumb .sep{color:rgba(255,255,255,.34);}
.breadcrumb .current{max-width:min(520px,60vw);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:rgba(255,255,255,.9);}
.article-hero h1{font-family:var(--font-serif);font-size:clamp(26px,3.6vw,42px);line-height:1.28;letter-spacing:-.02em;max-width:900px;color:#fff;}
.hero-kicker{display:inline-block;font-size:11.5px;letter-spacing:.16em;color:var(--teal);border:1px solid rgba(47,191,174,.5);border-radius:999px;padding:4px 12px;margin-bottom:16px;}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;margin-top:22px;font-size:13px;color:rgba(255,255,255,.7);}
.article-meta .meta-item{display:flex;align-items:center;gap:7px;}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--teal);}
.meta-tag{display:inline-block;padding:3px 10px;border-radius:var(--r-tag);background:rgba(47,191,174,.16);color:#8FE7DC;font-size:12px;letter-spacing:.04em;}

/* ============ 正文布局 ============ */
.article-main{padding:56px 0 72px;}
.article-layout{display:grid;grid-template-columns:1fr;gap:48px;align-items:start;}
@media (min-width:1024px){.article-layout{grid-template-columns:minmax(0,1fr) 300px;gap:56px;}}
.article-body{max-width:760px;background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:30px 24px;box-shadow:var(--sh-1);}
@media (min-width:768px){.article-body{padding:44px 48px;}}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 1.1em;color:var(--t2);line-height:1.85;}
.article-body > p:first-of-type{font-size:17px;color:var(--t1);}
.article-body h2{position:relative;font-family:var(--font-serif);font-size:clamp(20px,2.2vw,26px);line-height:1.4;color:var(--ink);margin:2em 0 .7em;padding-left:16px;}
.article-body h2::before{content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:4px;border-radius:2px;background:var(--teal);}
.article-body h3{font-size:18px;line-height:1.5;color:var(--ink);margin:1.6em 0 .5em;}
.article-body a{color:var(--teal-hover);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;}
.article-body a:hover{color:var(--ink);}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:2px;}
.article-body ul li{position:relative;padding-left:20px;margin:8px 0;color:var(--t2);}
.article-body ul li::before{content:"";position:absolute;left:2px;top:.72em;width:6px;height:6px;border-radius:50%;background:var(--teal);}
.article-body ol{list-style:none;counter-reset:li;}
.article-body ol li{position:relative;padding-left:30px;margin:8px 0;color:var(--t2);counter-increment:li;}
.article-body ol li::before{content:counter(li,decimal-leading-zero);position:absolute;left:0;top:0;font-family:var(--font-serif);font-size:14px;color:var(--teal);}
.article-body blockquote{margin:1.4em 0;padding:16px 20px;background:var(--teal-soft);border-left:3px solid var(--teal);border-radius:0 var(--r-tag) var(--r-tag) 0;color:var(--ink-2);}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--r-img);margin:1.6em 0;width:100%;height:auto;}
.article-body figure{margin:1.6em 0;}
.article-body figcaption{font-size:13px;color:var(--t3);margin-top:8px;text-align:center;}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:14.5px;border:1px solid var(--line);border-radius:var(--r-tag);overflow:hidden;}
.article-body th,.article-body td{border-bottom:1px solid var(--divider);padding:11px 14px;text-align:left;color:var(--t2);}
.article-body thead th{background:#FAFAF8;color:var(--ink);font-weight:600;}
.article-body tbody tr:nth-child(even){background:#FCFCFB;}
.article-body hr{border:none;border-top:1px solid var(--divider);margin:2em 0;}
.article-body code{background:#F2F3F7;border-radius:4px;padding:2px 6px;font-size:14px;color:var(--ink-2);}

/* 空态 */
.empty-state{text-align:center;padding:64px 20px;}
.empty-state .empty-icon{width:56px;height:56px;margin:0 auto 18px;border-radius:50%;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--teal);font-size:22px;}
.empty-state h2{font-family:var(--font-serif);font-size:22px;color:var(--ink);margin-bottom:10px;}
.empty-state p{color:var(--t2);margin-bottom:22px;}

/* ============ 侧栏 ============ */
.side-col{display:flex;flex-direction:column;gap:20px;}
.side-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:20px;box-shadow:var(--sh-1);}
.side-title{display:flex;align-items:center;gap:8px;font-size:13px;letter-spacing:.14em;color:var(--t3);margin-bottom:14px;}
.side-title::before{content:"";width:3px;height:13px;border-radius:2px;background:var(--teal);}
.toc-list{display:flex;flex-direction:column;gap:2px;max-height:340px;overflow:auto;}
.toc-list a{display:block;font-size:13.5px;line-height:1.6;color:var(--t2);padding:7px 0 7px 12px;border-left:2px solid var(--divider);transition:all .18s ease;}
.toc-list a:hover{color:var(--teal-hover);border-left-color:var(--teal);padding-left:16px;}
.toc-list a.lv3{padding-left:26px;font-size:13px;color:var(--t3);}
.hot-list{display:flex;flex-direction:column;}
.hot-list a{display:flex;gap:10px;align-items:flex-start;padding:12px 0;border-bottom:1px solid var(--divider);font-size:14px;color:var(--t2);line-height:1.6;}
.hot-list a:last-child{border-bottom:none;padding-bottom:0;}
.hot-list .idx{font-family:var(--font-serif);font-size:14px;color:var(--teal);flex-shrink:0;}
.hot-list a:hover{color:var(--ink);}
.side-note{background:var(--night);color:rgba(255,255,255,.78);border-radius:var(--r-card);padding:22px 20px;}
.side-note h3{font-family:var(--font-serif);font-size:17px;color:#fff;margin-bottom:8px;}
.side-note p{font-size:13.5px;line-height:1.75;margin-bottom:16px;}

/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:var(--r-btn);font-size:14.5px;letter-spacing:.02em;transition:all .18s ease;border:1px solid transparent;min-height:44px;}
.btn-primary{background:var(--teal);color:#fff;}
.btn-primary:hover{background:var(--teal-hover);transform:translateY(-2px);box-shadow:var(--sh-2);}
.btn-ink{background:var(--ink);color:#fff;}
.btn-ink:hover{background:var(--ink-2);transform:translateY(-2px);box-shadow:var(--sh-2);}
.btn-ghost{border-color:rgba(255,255,255,.35);color:#fff;}
.btn-ghost:hover{background:rgba(255,255,255,.1);border-color:#fff;}
.btn-outline{border-color:var(--line);color:var(--ink);background:#fff;}
.btn-outline:hover{border-color:var(--teal);color:var(--teal-hover);}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--teal-hover);font-size:14px;}
.link-arrow .arw{transition:transform .18s ease;}
.link-arrow:hover .arw{transform:translateX(4px);}

/* ============ 文末区 ============ */
.article-foot{max-width:760px;margin-top:40px;display:flex;flex-direction:column;gap:28px;}
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.tag-row .tag-label{font-size:12px;letter-spacing:.14em;color:var(--t3);margin-right:4px;}
.tag{display:inline-block;padding:5px 12px;border-radius:var(--r-tag);background:var(--teal-soft);color:var(--ink-2);font-size:12.5px;letter-spacing:.02em;border:1px solid transparent;}
.tag:hover{border-color:var(--teal);color:var(--teal-hover);}
.cta-band{background:var(--night);border-radius:var(--r-card);padding:26px 24px;color:#fff;display:flex;flex-direction:column;gap:20px;justify-content:space-between;}
@media (min-width:768px){.cta-band{flex-direction:row;align-items:center;padding:28px 32px;}}
.cta-band h3{font-family:var(--font-serif);font-size:20px;margin-bottom:6px;color:#fff;}
.cta-band p{font-size:13.5px;color:rgba(255,255,255,.7);line-height:1.7;}
.cta-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;}
.round-btn{width:44px;height:44px;border-radius:50%;border:1px solid rgba(255,255,255,.28);display:flex;align-items:center;justify-content:center;color:#fff;font-size:15px;transition:all .18s ease;}
.round-btn:hover{background:rgba(255,255,255,.12);border-color:#fff;transform:translateY(-2px);}

.related-section{margin-top:12px;}
.related-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:18px;}
.related-head h2{font-family:var(--font-serif);font-size:clamp(19px,2vw,23px);color:var(--ink);}
.related-head span{font-size:13px;color:var(--t3);}
.related-grid{display:grid;grid-template-columns:1fr;gap:18px;}
@media (min-width:640px){.related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.related-grid{grid-template-columns:repeat(3,minmax(0,1fr));}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);transition:transform .2s ease,box-shadow .2s ease;display:flex;flex-direction:column;}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.card-cover{aspect-ratio:16/10;overflow:hidden;background:var(--ink);position:relative;}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.card:hover .card-cover img{transform:scale(1.03);}
.card-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-body h3{font-size:16.5px;line-height:1.55;color:var(--ink);font-weight:600;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-body p{font-size:13.5px;line-height:1.7;color:var(--t2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:auto;padding-top:6px;}
.card-foot .tag{font-size:12px;}
.card-foot .date{font-size:12.5px;color:var(--t3);}

.back-band{display:flex;flex-direction:column;gap:14px;align-items:flex-start;border-top:1px solid var(--divider);padding-top:24px;margin-top:8px;}
@media (min-width:768px){.back-band{flex-direction:row;align-items:center;justify-content:space-between;}}
.back-band .back-text{font-size:14px;color:var(--t2);}

/* ============ 返回顶部 ============ */
.to-top{position:fixed;right:20px;bottom:24px;width:46px;height:46px;border-radius:50%;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;box-shadow:var(--sh-2);opacity:0;pointer-events:none;transform:translateY(8px);transition:all .22s ease;z-index:110;}
.to-top.show{opacity:1;pointer-events:auto;transform:translateY(0);}
.to-top:hover{background:var(--teal);}

/* ============ 页脚 ============ */
.site-footer{background:var(--night);color:rgba(255,255,255,.7);margin-top:0;padding:56px 0 0;}
.site-footer .brand-name{color:#fff;}
.site-footer .brand-sub{color:rgba(255,255,255,.45);}
.site-footer .brand-mark{background:var(--teal);color:#06231F;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;padding-bottom:40px;}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;}}
.footer-about{font-size:13.5px;line-height:1.8;margin-top:16px;max-width:330px;color:rgba(255,255,255,.6);}
.footer-title{font-size:12px;letter-spacing:.14em;color:rgba(255,255,255,.45);margin-bottom:14px;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:13.5px;color:rgba(255,255,255,.74);}
.footer-links a:hover{color:var(--teal);}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0 26px;display:flex;flex-direction:column;gap:8px;font-size:12.5px;color:rgba(255,255,255,.48);}
@media (min-width:768px){.footer-bottom{flex-direction:row;align-items:center;justify-content:space-between;}}

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

/* roulang page: category2 */
:root{
    --ink:#0E1230;
    --ink-2:#1A1F45;
    --teal:#2FBFAE;
    --teal-hover:#24A796;
    --teal-soft:#E6F7F4;
    --violet:#7C6BF2;
    --paper:#F7F7F5;
    --card:#FFFFFF;
    --night:#0B0F26;
    --text-1:#12142B;
    --text-2:#4B5069;
    --text-3:#8A90A6;
    --line:#E7E8EF;
    --line-soft:#EFF0F5;
    --r-card:14px;
    --r-btn:10px;
    --r-img:12px;
    --r-tag:6px;
    --shadow-1:0 1px 2px rgba(14,18,48,.04);
    --shadow-2:0 14px 34px -20px rgba(14,18,48,.22);
    --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
    --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  }
  *,*::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:1.85;
    color:var(--text-1);
    background:var(--paper);
    font-variant-numeric:tabular-nums;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  button,input{font-family:inherit;font-size:inherit;color:inherit}
  h1,h2,h3,h4{font-family:var(--font-serif);color:var(--text-1);margin:0;font-weight:700;letter-spacing:-.01em}
  h1{font-size:clamp(30px,4.4vw,54px);line-height:1.15;letter-spacing:-.02em}
  h2{font-size:clamp(22px,2.6vw,34px);line-height:1.25}
  h3{font-size:19px;line-height:1.4}
  p{margin:0}
  ul{margin:0;padding:0;list-style:none}
  :focus-visible{outline:2px solid var(--violet);outline-offset:2px;border-radius:4px}
  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
  @media (min-width:768px){.container{padding:0 24px}}
  .skip-link{position:absolute;left:-9999px;top:0;background:var(--ink);color:#fff;padding:10px 16px;border-radius:0 0 8px 0;z-index:100}
  .skip-link:focus{left:0}
  .section{padding:56px 0}
  @media (min-width:1024px){.section{padding:104px 0}}
  .section-tight{padding:40px 0}
  @media (min-width:1024px){.section-tight{padding:64px 0}}
  .eyebrow{font-size:12px;letter-spacing:.14em;color:var(--teal);font-weight:600;text-transform:uppercase;display:block;margin-bottom:14px}
  .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px}
  .section-head p{color:var(--text-2);font-size:15px;margin-top:10px;max-width:560px}
  .rule{width:28px;height:3px;background:var(--teal);border-radius:2px;margin-bottom:16px}

  /* header */
  .site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid var(--line);transition:box-shadow .25s ease}
  .site-header.scrolled{box-shadow:0 6px 22px -18px rgba(14,18,48,.5)}
  .topline{display:flex;align-items:center;gap:20px;height:64px;transition:height .25s ease}
  .site-header.scrolled .topline{height:56px}
  .brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
  .brand-mark{width:34px;height:34px;border-radius:9px;background:var(--ink);color:#fff;display:grid;place-items:center;font-family:var(--font-serif);font-size:18px;line-height:1;flex:0 0 auto}
  .brand-text{display:flex;flex-direction:column;line-height:1.25}
  .brand-name{font-family:var(--font-serif);font-size:16px;font-weight:700;color:var(--text-1)}
  .brand-sub{font-size:11px;letter-spacing:.14em;color:var(--text-3)}
  .main-nav{display:flex;align-items:center;gap:26px;margin-left:14px}
  .main-nav a{font-size:14px;color:var(--text-2);position:relative;padding:6px 0;transition:color .2s ease}
  .main-nav a:hover{color:var(--ink)}
  .main-nav a.active{color:var(--ink);font-weight:600}
  .main-nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;background:var(--teal);border-radius:2px}
  .header-tools{margin-left:auto;display:flex;align-items:center;gap:10px}
  .search-form{display:flex;align-items:center;gap:8px;height:40px;padding:0 14px;border:1px solid var(--line);border-radius:var(--r-btn);background:#fff;transition:border-color .2s ease,box-shadow .2s ease}
  .search-form:focus-within{border-color:var(--teal);box-shadow:0 0 0 3px rgba(47,191,174,.14)}
  .search-icon{color:var(--text-3);font-size:15px}
  .search-input{border:0;outline:0;background:transparent;width:180px;font-size:14px}
  .search-input::placeholder{color:var(--text-3)}
  .icon-btn{display:none;width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:var(--r-btn);color:var(--text-2);cursor:pointer;align-items:center;justify-content:center;font-size:17px;transition:border-color .2s ease,color .2s ease}
  .icon-btn:hover{border-color:var(--teal);color:var(--ink)}
  .burger{display:none;width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:var(--r-btn);cursor:pointer;align-items:center;justify-content:center;color:var(--ink)}
  .burger:hover{border-color:var(--teal)}
  .channel-bar{border-top:1px solid var(--line-soft)}
  .channel-inner{display:flex;align-items:center;gap:24px;height:40px;font-size:13px;letter-spacing:.02em}
  .channel-inner > a{color:var(--text-2);height:40px;display:inline-flex;align-items:center;border-bottom:2px solid transparent;transition:color .2s ease}
  .channel-inner > a:hover{color:var(--ink)}
  .channel-inner > a.active{color:var(--ink);font-weight:600;border-bottom-color:var(--teal)}
  .hot-row{margin-left:auto;display:flex;align-items:center;gap:8px}
  .hot-label{font-size:11px;letter-spacing:.14em;color:var(--text-3)}
  .hot-chip{display:inline-flex;align-items:center;height:24px;padding:0 12px;border-radius:999px;background:var(--teal-soft);color:var(--ink-2);font-size:12px;transition:background .2s ease,color .2s ease}
  .hot-chip:hover{background:var(--teal);color:#fff}

  /* mobile drawer */
  .drawer-mask{position:fixed;inset:0;background:rgba(11,15,38,.5);opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease;z-index:70}
  .drawer-mask.open{opacity:1;visibility:visible}
  .mobile-drawer{position:fixed;top:0;right:0;height:100%;width:min(86vw,340px);background:#fff;z-index:80;transform:translateX(100%);transition:transform .24s ease;padding:20px;display:flex;flex-direction:column;gap:20px;overflow-y:auto}
  .mobile-drawer.open{transform:translateX(0)}
  .drawer-head{display:flex;align-items:center;justify-content:space-between}
  .drawer-close{width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:var(--r-btn);font-size:20px;cursor:pointer;color:var(--text-2)}
  .drawer-nav{display:flex;flex-direction:column;border-top:1px solid var(--line-soft)}
  .drawer-nav a{padding:14px 0;border-bottom:1px solid var(--line-soft);font-size:15px;color:var(--text-2)}
  .drawer-nav a.active{color:var(--ink);font-weight:600;border-left:2px solid var(--teal);padding-left:12px}
  .drawer-search{display:flex;height:44px;border:1px solid var(--line);border-radius:var(--r-btn);padding:0 12px;align-items:center}
  .drawer-search input{border:0;outline:0;width:100%;font-size:14px}
  .drawer-hot{display:flex;flex-wrap:wrap;gap:8px}

  /* buttons */
  .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:var(--r-btn);font-size:14.5px;font-weight:600;cursor:pointer;border:1px solid transparent;transition:background .2s ease,color .2s ease,border-color .2s ease,transform .18s ease,box-shadow .2s ease;min-height:44px}
  .btn-primary{background:var(--teal);color:#fff}
  .btn-primary:hover{background:var(--teal-hover);transform:translateY(-1px)}
  .btn-ink{background:var(--ink);color:#fff}
  .btn-ink:hover{background:var(--ink-2);transform:translateY(-1px)}
  .btn-ghost{background:transparent;border-color:rgba(255,255,255,.55);color:#fff}
  .btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff}
  .btn-outline{background:#fff;border-color:var(--line);color:var(--ink-2)}
  .btn-outline:hover{border-color:var(--teal);color:var(--ink)}
  .btn:active{transform:translateY(0)}
  .link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--teal);font-size:14px;font-weight:600}
  .link-arrow span{transition:transform .2s ease}
  .link-arrow:hover span{transform:translateX(4px)}

  /* tags & badges */
  .tag{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-tag);background:var(--teal-soft);color:var(--ink-2);font-size:12px;letter-spacing:.02em}
  .tag-violet{background:#F0EDFE;color:#4B3FB0}
  .badge{display:inline-flex;align-items:center;height:22px;padding:0 9px;border-radius:999px;border:1px solid var(--line);font-size:11.5px;color:var(--text-2);background:#fff}

  /* page hero */
  .page-hero{position:relative;overflow:hidden;background:var(--night);color:#fff}
  .page-hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.5}
  .page-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(105deg,rgba(11,15,38,.94) 0%,rgba(14,18,48,.82) 48%,rgba(26,31,69,.74) 100%)}
  .page-hero-inner{position:relative;z-index:2;padding:48px 0 44px;min-height:260px;display:flex;flex-direction:column;justify-content:center}
  @media (min-width:1024px){.page-hero-inner{padding:64px 0 60px}}
  .breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.66);margin-bottom:18px;flex-wrap:wrap}
  .breadcrumb a{color:rgba(255,255,255,.8)}
  .breadcrumb a:hover{color:#fff}
  .breadcrumb .sep{opacity:.5}
  .page-hero h1{color:#fff;max-width:820px}
  .page-hero-desc{color:rgba(255,255,255,.78);font-size:15.5px;line-height:1.8;max-width:700px;margin-top:16px}
  .page-stats{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
  .stat-chip{display:flex;align-items:baseline;gap:8px;padding:10px 16px;border:1px solid rgba(255,255,255,.22);border-radius:var(--r-btn);background:rgba(255,255,255,.06)}
  .stat-chip b{font-family:var(--font-serif);font-size:20px;color:#fff;line-height:1}
  .stat-chip span{font-size:12.5px;color:rgba(255,255,255,.72)}

  /* tabs */
  .tabbar{background:#fff;border-bottom:1px solid var(--line);position:relative;z-index:3}
  .tabbar-inner{display:flex;align-items:center;gap:26px;height:54px;overflow-x:auto;scrollbar-width:none}
  .tabbar-inner::-webkit-scrollbar{display:none}
  .tabbar-inner a{font-size:14px;color:var(--text-2);white-space:nowrap;height:54px;display:inline-flex;align-items:center;border-bottom:2px solid transparent;transition:color .2s ease}
  .tabbar-inner a:hover{color:var(--ink)}
  .tabbar-inner a.active{color:var(--ink);font-weight:600;border-bottom-color:var(--teal)}

  /* layout */
  .cat-layout{display:grid;grid-template-columns:1fr;gap:40px}
  @media (min-width:1024px){.cat-layout{grid-template-columns:minmax(0,1fr) 336px;gap:56px;align-items:start}}

  /* numbered list */
  .num-list{border-top:1px solid var(--line)}
  .num-item{display:grid;grid-template-columns:64px minmax(0,1fr) 24px;gap:16px;padding:22px 4px;border-bottom:1px solid var(--line);transition:background .2s ease}
  .num-item:hover{background:rgba(255,255,255,.85)}
  .num-index{font-family:var(--font-serif);font-size:26px;line-height:1.1;color:var(--text-3);transition:color .2s ease,transform .2s ease}
  .num-item:hover .num-index{color:var(--teal);transform:translateX(4px)}
  .num-title{font-family:var(--font-serif);font-size:18px;font-weight:700;color:var(--ink);display:inline-block}
  .num-title:hover{color:var(--teal)}
  .num-text{color:var(--text-2);font-size:14.5px;line-height:1.8;margin-top:8px;max-width:620px}
  .num-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:12px;font-size:12.5px;color:var(--text-3)}
  .num-arrow{display:flex;align-items:center;justify-content:center;color:var(--text-3);font-size:16px;transition:color .2s ease,transform .2s ease}
  .num-item:hover .num-arrow{color:var(--teal);transform:translateX(3px)}

  /* side cards */
  .side-stack{display:flex;flex-direction:column;gap:20px}
  @media (min-width:1024px){.side-stack{position:sticky;top:88px}}
  .card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-1)}
  .side-card{padding:22px}
  .side-card h3{font-size:16px;margin-bottom:14px}
  .side-index{display:flex;flex-direction:column}
  .side-index a{display:flex;align-items:center;gap:10px;padding:10px 0;border-bottom:1px dashed var(--line-soft);font-size:14px;color:var(--text-2);transition:color .2s ease}
  .side-index a:last-child{border-bottom:0}
  .side-index a:hover{color:var(--ink)}
  .side-index a i{font-style:normal;font-family:var(--font-serif);color:var(--teal);font-size:13px}
  .point-list{display:flex;flex-direction:column;gap:14px}
  .point-list li{display:flex;gap:10px;font-size:14px;color:var(--text-2);line-height:1.75}
  .point-list li b{color:var(--ink);font-weight:600}
  .dot{width:6px;height:6px;border-radius:50%;background:var(--teal);flex:0 0 auto;margin-top:10px}
  .side-dark{background:var(--night);color:#fff;border-color:transparent;border-radius:var(--r-card);padding:22px}
  .side-dark h3{color:#fff;font-size:16px;margin-bottom:10px}
  .side-dark p{font-size:13.5px;color:rgba(255,255,255,.72);line-height:1.8;margin-bottom:16px}

  /* scenario block */
  .scenario{display:grid;grid-template-columns:1fr;gap:32px;align-items:center}
  @media (min-width:1024px){.scenario{grid-template-columns:minmax(0,460px) minmax(0,1fr);gap:56px}}
  .scenario-figure{position:relative;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);background:var(--ink)}
  .scenario-figure img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .5s ease}
  .scenario-figure:hover img{transform:scale(1.03)}
  .scenario-list{display:flex;flex-direction:column;border-top:1px solid var(--line)}
  .scenario-row{display:grid;grid-template-columns:44px minmax(0,1fr);gap:16px;padding:18px 0;border-bottom:1px solid var(--line)}
  .scenario-row em{font-style:normal;font-family:var(--font-serif);font-size:15px;color:var(--teal)}
  .scenario-row h3{font-size:16.5px;margin-bottom:6px}
  .scenario-row p{font-size:14px;color:var(--text-2);line-height:1.8}

  /* flow */
  .flow{display:grid;grid-template-columns:1fr;gap:16px}
  @media (min-width:640px){.flow{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media (min-width:1024px){.flow{grid-template-columns:repeat(4,minmax(0,1fr))}}
  .flow-step{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:22px;position:relative;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease}
  .flow-step:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#DDE7E4}
  .flow-step .step-no{font-family:var(--font-serif);font-size:13px;letter-spacing:.08em;color:var(--teal);display:block;margin-bottom:12px}
  .flow-step h3{font-size:16px;margin-bottom:8px}
  .flow-step p{font-size:13.5px;color:var(--text-2);line-height:1.8}
  .flow-step::after{content:"";position:absolute;right:-9px;top:38px;width:18px;height:1px;background:var(--line);display:none}
  @media (min-width:1024px){.flow-step::after{display:block}}
  .flow-step:last-child::after{display:none}

  /* related */
  .related-grid{display:grid;grid-template-columns:1fr;gap:20px}
  @media (min-width:640px){.related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media (min-width:1024px){.related-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
  .related-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:22px;display:flex;flex-direction:column;gap:10px;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease}
  .related-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#DDE7E4}
  .related-card h3{font-size:17px}
  .related-card p{font-size:14px;color:var(--text-2);line-height:1.8;flex:1}

  /* CTA */
  .cta-band{background:var(--night);color:#fff;border-radius:var(--r-card);padding:34px 26px;display:flex;flex-direction:column;gap:24px}
  @media (min-width:1024px){.cta-band{flex-direction:row;align-items:center;justify-content:space-between;padding:44px 48px}}
  .cta-band h2{color:#fff;font-size:clamp(20px,2.2vw,28px)}
  .cta-band p{color:rgba(255,255,255,.72);font-size:14.5px;margin-top:10px;max-width:520px;line-height:1.8}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px}

  /* faq */
  .faq-wrap{max-width:880px}
  .faq{border:1px solid var(--line);border-radius:var(--r-card);background:#fff;overflow:hidden}
  .faq details{border-bottom:1px solid var(--line-soft)}
  .faq details:last-child{border-bottom:0}
  .faq summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 22px;font-family:var(--font-serif);font-size:16.5px;font-weight:700;color:var(--ink);transition:background .2s ease}
  .faq summary::-webkit-details-marker{display:none}
  .faq summary:hover{background:#FAFBFC}
  .faq-icon{flex:0 0 auto;width:26px;height:26px;border-radius:50%;border:1px solid var(--line);display:grid;place-items:center;font-size:14px;color:var(--teal);transition:transform .25s ease}
  .faq details[open] .faq-icon{transform:rotate(180deg)}
  .faq-body{padding:0 22px 22px;color:var(--text-2);font-size:14.5px;line-height:1.85;max-width:760px}

  /* footer */
  .site-footer{background:var(--night);color:rgba(255,255,255,.74);margin-top:0;padding:56px 0 0}
  .footer-grid{display:grid;grid-template-columns:1fr;gap:32px;padding-bottom:40px}
  @media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}}
  .site-footer .brand-name{color:#fff}
  .site-footer .brand-sub{color:rgba(255,255,255,.5)}
  .site-footer .brand-mark{background:var(--teal);color:var(--night)}
  .footer-about{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.66);margin-top:16px;max-width:340px}
  .footer-title{font-family:var(--font-serif);font-size:14px;color:#fff;letter-spacing:.04em;margin-bottom:14px}
  .footer-links{display:flex;flex-direction:column;gap:10px}
  .footer-links a{font-size:13.5px;color:rgba(255,255,255,.72);transition:color .2s ease}
  .footer-links a:hover{color:var(--teal)}
  .footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:18px 0;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:12.5px;color:rgba(255,255,255,.5)}

  /* back to top */
  .to-top{position:fixed;right:20px;bottom:24px;width:46px;height:46px;border-radius:50%;background:var(--ink);color:#fff;border:0;display:grid;place-items:center;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .25s ease,transform .25s ease,visibility .25s ease;z-index:55}
  .to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
  .to-top:hover{background:var(--teal-hover)}

  /* reveal */
  .reveal{opacity:0;transform:translateY(12px);transition:opacity .6s ease,transform .6s ease}
  .reveal.in{opacity:1;transform:none}
  @media (prefers-reduced-motion:reduce){
    *{animation:none!important;transition:none!important}
    .reveal{opacity:1;transform:none}
    html{scroll-behavior:auto}
  }

  @media (max-width:1023px){
    .main-nav{display:none}
    .channel-bar{display:none}
    .search-form{display:none}
    .icon-btn{display:inline-flex}
    .burger{display:inline-flex}
  }
  @media (min-width:1024px){
    .mobile-drawer,.drawer-mask{display:none}
  }
  @media (max-width:640px){
    .num-item{grid-template-columns:48px minmax(0,1fr);gap:12px}
    .num-arrow{display:none}
    .num-index{font-size:22px}
    .section-head{flex-direction:column;align-items:flex-start}
    .brand-sub{display:none}
  }

/* roulang page: category1 */
:root{
  --ink:#0E1230;
  --ink-2:#1A1F45;
  --teal:#2FBFAE;
  --teal-hover:#24A796;
  --teal-soft:#E6F7F4;
  --violet:#7C6BF2;
  --paper:#F7F7F5;
  --card:#FFFFFF;
  --night:#0B0F26;
  --text-1:#12142B;
  --text-2:#4B5069;
  --text-3:#8A90A6;
  --line:#E7E8EF;
  --divider:#EFF0F5;
  --radius-card:14px;
  --radius-btn:10px;
  --shadow-soft:0 1px 2px rgba(14,18,48,.04);
  --shadow-lift:0 14px 34px -20px rgba(14,18,48,.22);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--text-1);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--violet);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 24px}}

/* ---------- 顶栏 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 24px -18px rgba(14,18,48,.4)}
.topline{display:flex;align-items:center;gap:20px;min-height:62px;transition:min-height .25s ease}
.site-header.is-scrolled .topline{min-height:54px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-mark{
  width:36px;height:36px;border-radius:10px;
  background:linear-gradient(135deg,var(--ink) 0%,var(--ink-2) 100%);
  color:#fff;display:grid;place-items:center;
  font-family:var(--font-serif);font-size:18px;line-height:1;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-name{font-family:var(--font-serif);font-size:16px;font-weight:700;letter-spacing:-.01em;color:var(--ink)}
.brand-sub{font-size:11px;letter-spacing:.1em;color:var(--text-3)}
.main-nav{display:none}
@media (min-width:1024px){
  .main-nav{display:flex;align-items:center;gap:24px;margin-left:10px}
}
.main-nav a{
  position:relative;font-size:14px;letter-spacing:.02em;color:var(--text-2);
  padding:6px 0;transition:color .2s ease;
}
.main-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--teal);transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.main-nav a:hover{color:var(--ink)}
.main-nav a:hover::after{transform:scaleX(1)}
.main-nav a[aria-current="page"]{color:var(--ink);font-weight:600}
.main-nav a[aria-current="page"]::after{transform:scaleX(1)}
.header-tools{margin-left:auto;display:flex;align-items:center;gap:10px}
.search-form{
  display:none;align-items:center;gap:8px;height:40px;width:250px;
  padding:0 12px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-btn);
  transition:border-color .2s ease;
}
@media (min-width:768px){.search-form{display:flex}}
.search-form:focus-within{border-color:var(--teal)}
.search-icon{color:var(--text-3);font-size:15px;line-height:1}
.search-input{width:100%;border:0;outline:none;background:transparent;font-size:13.5px}
.search-input::placeholder{color:var(--text-3)}
.icon-btn{
  display:grid;place-items:center;width:44px;height:44px;
  border:1px solid var(--line);border-radius:var(--radius-btn);background:#fff;
  color:var(--text-2);font-size:16px;transition:border-color .2s ease,color .2s ease;
}
.icon-btn:hover{border-color:var(--teal);color:var(--teal)}
@media (min-width:768px){.icon-btn{display:none}}
.burger{
  display:grid;place-items:center;width:44px;height:44px;
  border:1px solid var(--line);border-radius:var(--radius-btn);background:#fff;color:var(--ink);
}
.burger:hover{border-color:var(--teal)}
@media (min-width:1024px){.burger{display:none}}
.channel-bar{display:none;border-top:1px solid var(--line);background:rgba(255,255,255,.7)}
@media (min-width:1024px){.channel-bar{display:block}}
.channel-inner{display:flex;align-items:center;gap:20px;min-height:40px;overflow-x:auto}
.channel-inner > a{
  position:relative;font-size:13px;letter-spacing:.06em;color:var(--text-2);
  padding:11px 0;white-space:nowrap;transition:color .2s ease;
}
.channel-inner > a:hover{color:var(--ink)}
.channel-inner > a.active{color:var(--ink);font-weight:600;box-shadow:inset 0 -2px 0 var(--teal)}
.hot-row{margin-left:auto;display:flex;align-items:center;gap:8px}
.hot-label{font-size:12px;letter-spacing:.14em;color:var(--text-3)}
.hot-chip{
  display:inline-block;font-size:12px;padding:4px 11px;border-radius:999px;
  background:var(--teal-soft);color:var(--ink-2);transition:background .2s ease,color .2s ease;
}
.hot-chip:hover{background:var(--teal);color:#fff}

/* ---------- 移动抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(11,15,38,.5);opacity:0;pointer-events:none;
  transition:opacity .24s ease;z-index:80;
}
.drawer-mask.show{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:300px;max-width:84vw;z-index:90;
  background:#fff;transform:translateX(100%);transition:transform .24s ease;
  padding:20px;overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-brand{font-family:var(--font-serif);font-size:16px;font-weight:700;color:var(--ink)}
.drawer-close{
  width:44px;height:44px;display:grid;place-items:center;font-size:16px;
  border:1px solid var(--line);border-radius:var(--radius-btn);color:var(--text-2);
}
.drawer-title{font-size:12px;letter-spacing:.14em;color:var(--text-3);margin:18px 0 8px}
.drawer-links a{
  display:block;padding:12px 2px;font-size:15px;color:var(--text-1);
  border-bottom:1px solid var(--divider);
}
.drawer-links a[aria-current="page"]{color:var(--teal);font-weight:600}
.drawer-search{height:44px;display:flex;align-items:center;border:1px solid var(--line);border-radius:var(--radius-btn);padding:0 12px}
.drawer-search input{width:100%;border:0;outline:none;background:transparent;font-size:14px}
.drawer-hot{display:flex;flex-wrap:wrap;gap:8px}

/* ---------- 页面头 ---------- */
.page-hero{
  position:relative;display:flex;align-items:center;overflow:hidden;
  min-height:230px;color:#fff;
  background:var(--night) url('/assets/images/backpic/back-2.png') center/cover no-repeat;
}
@media (min-width:768px){.page-hero{min-height:270px}}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(11,15,38,.92) 0%,rgba(14,18,48,.82) 46%,rgba(14,18,48,.62) 100%);
}
.page-hero .container{position:relative;z-index:2;padding-top:46px;padding-bottom:46px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12.5px;color:rgba(255,255,255,.7);margin-bottom:14px}
.breadcrumb a{color:rgba(255,255,255,.82)}
.breadcrumb a:hover{color:var(--teal)}
.breadcrumb .sep{color:rgba(255,255,255,.4)}
.page-title{
  font-family:var(--font-serif);
  font-size:clamp(26px,3.6vw,42px);line-height:1.2;letter-spacing:-.02em;
  font-weight:700;max-width:840px;
}
.page-lead{margin-top:14px;max-width:660px;font-size:15px;line-height:1.85;color:rgba(255,255,255,.82)}
.hero-stats{display:flex;flex-wrap:wrap;gap:28px;margin-top:26px}
.hero-stat{display:flex;flex-direction:column;gap:2px}
.hero-stat .num{font-family:var(--font-serif);font-size:22px;font-variant-numeric:tabular-nums;color:#fff}
.hero-stat .lbl{font-size:12px;letter-spacing:.08em;color:rgba(255,255,255,.66)}

/* ---------- 二级 Tab ---------- */
.subtabs{border-bottom:1px solid var(--line);background:#fff}
.subtabs-inner{display:flex;align-items:center;gap:22px;overflow-x:auto}
.subtab{
  position:relative;white-space:nowrap;font-size:14px;color:var(--text-2);
  padding:16px 0;transition:color .2s ease;
}
.subtab:hover{color:var(--ink)}
.subtab.active{color:var(--ink);font-weight:600;box-shadow:inset 0 -2px 0 var(--teal)}

/* ---------- 板块 ---------- */
.section{padding:64px 0}
@media (min-width:1024px){.section{padding:96px 0}}
.section-alt{background:#fff;border-top:1px solid var(--divider);border-bottom:1px solid var(--divider)}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:32px}
.sec-title{
  position:relative;padding-left:16px;
  font-family:var(--font-serif);font-size:clamp(21px,2.4vw,30px);line-height:1.3;
  letter-spacing:-.01em;font-weight:700;color:var(--ink);
}
.sec-title::before{
  content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:6px;
  border-radius:3px;background:var(--teal);
}
.sec-sub{margin-top:10px;font-size:14.5px;color:var(--text-2);max-width:600px}
.sec-link{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--teal);
  font-weight:600;transition:gap .2s ease;
}
.sec-link:hover{gap:10px;color:var(--teal-hover)}
.eyebrow{font-size:12px;letter-spacing:.14em;color:var(--text-3);text-transform:uppercase}

/* ---------- 合辑目录 ---------- */
.catalog-grid{display:grid;grid-template-columns:1fr;gap:0 52px}
@media (min-width:1024px){.catalog-grid{grid-template-columns:1fr 1fr}}
.catalog-list{border-top:1px solid var(--line)}
.catalog-item{
  display:grid;grid-template-columns:56px 1fr auto;gap:18px;align-items:center;
  padding:20px 8px;border-bottom:1px solid var(--line);
  transition:background .22s ease;
}
.catalog-item:hover{background:#fff}
.catalog-num{
  font-family:var(--font-serif);font-size:26px;line-height:1;color:#C7C9D6;
  font-variant-numeric:tabular-nums;transition:color .22s ease,transform .22s ease;
}
.catalog-item:hover .catalog-num{color:var(--teal);transform:translateX(4px)}
.catalog-name{font-family:var(--font-serif);font-size:17px;font-weight:600;color:var(--ink)}
.catalog-desc{margin-top:4px;font-size:13.5px;color:var(--text-2);line-height:1.7}
.catalog-count{font-size:12.5px;color:var(--text-3);white-space:nowrap;font-variant-numeric:tabular-nums}
.catalog-arrow{font-size:16px;color:var(--text-3);transition:color .22s ease,transform .22s ease}
.catalog-item:hover .catalog-arrow{color:var(--teal);transform:translateX(4px)}
.catalog-main{min-width:0}

/* ---------- 路径步骤 ---------- */
.steps{display:grid;grid-template-columns:1fr;gap:18px}
@media (min-width:640px){.steps{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.steps{grid-template-columns:repeat(4,1fr)}}
.step{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:22px;box-shadow:var(--shadow-soft);transition:transform .22s ease,box-shadow .22s ease;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-lift)}
.step-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:30px;height:30px;border-radius:9px;background:var(--teal-soft);color:var(--ink-2);
  font-size:13px;font-weight:700;font-variant-numeric:tabular-nums;margin-bottom:14px;
}
.step h3{font-family:var(--font-serif);font-size:16.5px;color:var(--ink);margin-bottom:8px}
.step p{font-size:13.5px;color:var(--text-2);line-height:1.8}

/* ---------- 卡片 ---------- */
.card-grid{display:grid;grid-template-columns:1fr;gap:24px}
@media (min-width:640px){.card-grid{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr)}}
.card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-soft);
  transition:transform .22s ease,box-shadow .22s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lift)}
.card-cover{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--ink)}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.card:hover .card-cover img{transform:scale(1.03)}
.card-body{display:flex;flex-direction:column;flex:1;gap:10px;padding:20px}
.card-title{
  font-family:var(--font-serif);font-size:17px;line-height:1.5;color:var(--ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-desc{
  font-size:13.8px;color:var(--text-2);line-height:1.78;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding-top:12px;border-top:1px solid var(--divider);font-size:12.5px;color:var(--text-3);
}
.tag{
  display:inline-block;font-size:12px;padding:3px 9px;border-radius:6px;
  background:var(--teal-soft);color:var(--ink-2);letter-spacing:.02em;
}

/* ---------- 对比面板 ---------- */
.compare-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:768px){.compare-grid{grid-template-columns:1fr 1fr}}
.compare{
  border-radius:var(--radius-card);padding:24px;border:1px solid var(--line);background:#fff;
}
.compare-safe{background:var(--teal-soft);border-color:#BDE9E2}
.compare-risk{background:#FDF3F2;border-color:#F0C9C4}
.compare-title{
  font-family:var(--font-serif);font-size:16px;font-weight:700;color:var(--ink);margin-bottom:14px;
  display:flex;align-items:center;gap:8px;
}
.compare-dot{width:8px;height:8px;border-radius:50%;background:var(--teal)}
.compare-risk .compare-dot{background:#D97768}
.compare li{
  position:relative;padding-left:18px;font-size:13.8px;color:var(--text-2);line-height:1.8;
  border-top:1px solid rgba(14,18,48,.06);
}
.compare li:first-child{border-top:0}
.compare li{padding-top:10px;padding-bottom:10px}
.compare li::before{
  content:"";position:absolute;left:0;top:20px;width:6px;height:6px;border-radius:50%;
  background:var(--teal);
}
.compare-risk li::before{background:#D97768}

/* ---------- 相关分类 ---------- */
.related-grid{display:grid;grid-template-columns:1fr;gap:18px}
@media (min-width:768px){.related-grid{grid-template-columns:repeat(3,1fr)}}
.related-card{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:20px 22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.related-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lift);border-color:#D6E9E6}
.related-card .rc-name{font-family:var(--font-serif);font-size:16px;color:var(--ink);font-weight:600}
.related-card .rc-desc{margin-top:4px;font-size:13px;color:var(--text-3)}
.related-card .rc-arrow{color:var(--teal);font-size:16px}

/* ---------- CTA ---------- */
.cta-band{
  background:linear-gradient(120deg,var(--night) 0%,var(--ink) 100%);
  border-radius:18px;padding:34px 28px;color:#fff;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
}
@media (min-width:768px){.cta-band{padding:44px 40px}}
.cta-title{font-family:var(--font-serif);font-size:clamp(20px,2.2vw,27px);line-height:1.3}
.cta-desc{margin-top:10px;font-size:14px;color:rgba(255,255,255,.72);max-width:520px}
.cta-actions{display:flex;flex-wrap:wrap;align-items:center;gap:12px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-btn);font-size:14.5px;font-weight:600;
  transition:background .2s ease,color .2s ease,transform .2s ease,border-color .2s ease;
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--teal);color:#062621}
.btn-primary:hover{background:var(--teal-hover)}
.btn-ghost{background:transparent;border:1px solid rgba(255,255,255,.42);color:#fff}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.btn-ink{background:var(--ink);color:#fff}
.btn-ink:hover{background:var(--ink-2)}
.icon-round{
  width:40px;height:40px;border-radius:50%;display:grid;place-items:center;
  border:1px solid rgba(255,255,255,.32);color:#fff;font-size:13px;
  transition:background .2s ease,border-color .2s ease,transform .2s ease;
}
.icon-round:hover{background:rgba(255,255,255,.12);border-color:#fff;transform:translateY(-2px)}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:880px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:12px;overflow:hidden}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;font-family:var(--font-serif);font-size:16px;color:var(--ink);
  transition:background .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{background:#F7F8FB}
.faq-icon{
  flex:none;width:26px;height:26px;border-radius:8px;display:grid;place-items:center;
  background:var(--teal-soft);color:var(--ink-2);font-size:15px;line-height:1;
  transition:transform .25s ease;
}
.faq-item[open] .faq-icon{transform:rotate(180deg)}
.faq-answer{padding:0 20px 20px;font-size:14px;color:var(--text-2);line-height:1.85}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--night);color:rgba(255,255,255,.7);padding-top:60px;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px}
@media (min-width:640px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.2fr}}
.site-footer .brand-name{color:#fff}
.site-footer .brand-sub{color:rgba(255,255,255,.5)}
.footer-about{margin-top:16px;font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.62);max-width:340px}
.footer-title{font-size:12px;letter-spacing:.14em;color:#fff;margin-bottom:14px}
.footer-links a{display:block;padding:6px 0;font-size:13.5px;color:rgba(255,255,255,.66);transition:color .2s ease}
.footer-links a:hover{color:var(--teal)}
.footer-bottom{
  margin-top:44px;padding:20px 0;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:12.5px;color:rgba(255,255,255,.5);
}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:20px;bottom:24px;z-index:70;
  width:44px;height:44px;border-radius:50%;display:grid;place-items:center;
  background:var(--ink);color:#fff;font-size:16px;box-shadow:var(--shadow-lift);
  opacity:0;pointer-events:none;transition:opacity .24s ease,transform .24s ease;
}
.to-top.show{opacity:1;pointer-events:auto}
.to-top:hover{transform:translateY(-3px);background:var(--ink-2)}

/* ---------- 进场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s ease,transform .6s ease}
.reveal.is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none;transition:none}
  *{animation:none!important;transition-duration:.01ms!important}
}