/* roulang page: index */
/* ========== 设计变量 ========== */
:root{
  --ink:#101216;
  --ink-2:#1B1E24;
  --paper:#F7F5F1;
  --card:#FFFFFF;
  --accent:#FF5A1F;
  --accent-dark:#E04A12;
  --accent-soft:#FFEDE5;
  --accent-2:#16C2A8;
  --accent-2-soft:#E1F8F3;
  --line:#E4E0D8;
  --muted:#6B6F76;
  --muted-2:#93979D;
  --radius-card:16px;
  --radius-img:12px;
  --radius-input:12px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(16,18,22,.06),0 8px 24px rgba(16,18,22,.06);
  --shadow-2:0 12px 32px rgba(16,18,22,.12);
  --ease:cubic-bezier(.2,.8,.2,1);
  --dur:.35s;
  --wrap:1200px;
  --sec-y:96px;
}
/* ========== 基础重置 ========== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  font-size:16px;
  line-height:1.7;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
  -webkit-tap-highlight-color:transparent;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;background-color:transparent}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p,figure{margin:0}
h1,h2,h3,h4{font-weight:800;letter-spacing:-.02em;line-height:1.2}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
::selection{background:var(--accent);color:#fff}

/* ========== 容器与栅格 ========== */
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px}
.row.grid-gap{display:flex;flex-wrap:wrap;margin-left:-12px;margin-right:-12px;max-width:var(--wrap)}
.grid-gap>.column{padding-left:12px;padding-right:12px;margin-bottom:24px}
.section{padding:var(--sec-y) 0;position:relative}
.section--tight{padding:calc(var(--sec-y) * .7) 0}
.section--dark{background:var(--ink);color:#fff}
.section--card{background:var(--card);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}

/* ========== 通用排版 ========== */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;color:var(--accent);
  letter-spacing:.08em;text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--accent);display:inline-block;border-radius:2px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:40px;flex-wrap:wrap}
.section-head h2{font-size:clamp(26px,3.2vw,38px)}
.section-head__note{font-size:14px;color:var(--muted);max-width:360px;margin:0}
.lead{font-size:17px;color:var(--muted);max-width:640px}

/* ========== 顶部细条 ========== */
.topbar{background:var(--ink);color:rgba(255,255,255,.72);font-size:13px}
.topbar__inner{display:flex;align-items:center;justify-content:flex-end;gap:20px;min-height:38px;flex-wrap:wrap}
.topbar__note{position:relative;padding-left:14px}
.topbar__note::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:6px;height:6px;border-radius:50%;background:var(--accent-2)}
.topbar__link{color:#fff;border-bottom:1px solid rgba(255,255,255,.35);padding-bottom:1px;transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease)}
.topbar__link:hover{color:var(--accent);border-color:var(--accent)}

/* ========== 导航 ========== */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,245,241,.96);
  backdrop-filter:saturate(140%) blur(6px);
  border-bottom:1px solid transparent;
  transition:box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.site-header.is-stuck{border-bottom-color:var(--line);box-shadow:0 6px 20px rgba(16,18,22,.07)}
.header__inner{display:flex;align-items:center;gap:20px;min-height:74px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;max-width:44%}
.brand__mark{
  width:26px;height:26px;border-radius:8px;flex:0 0 auto;
  background:var(--accent);
  position:relative;overflow:hidden;
}
.brand__mark::after{
  content:"";position:absolute;inset:7px;
  background:#fff;border-radius:3px;
  transform:rotate(45deg);
}
.brand__text{
  font-size:16px;font-weight:900;letter-spacing:-.02em;line-height:1.25;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.nav-chips{
  display:flex;align-items:center;gap:8px;
  flex:1 1 auto;min-width:0;
  overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
  padding:6px 2px;
  -webkit-mask-image:linear-gradient(90deg,#000 0,#000 calc(100% - 34px),transparent 100%);
  mask-image:linear-gradient(90deg,#000 0,#000 calc(100% - 34px),transparent 100%);
}
.nav-chips::-webkit-scrollbar{display:none}
.chip{
  display:inline-flex;align-items:center;justify-content:center;
  flex:0 0 auto;
  height:36px;padding:0 16px;border-radius:var(--radius-pill);
  border:1px solid var(--line);background:transparent;
  font-size:14px;font-weight:600;color:var(--ink);
  white-space:nowrap;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.chip:hover{border-color:var(--ink);transform:translateY(-1px)}
.chip.is-active{background:var(--ink);color:#fff;border-color:var(--ink)}
.chip--filter{height:34px;font-size:13px;background:var(--card)}
.chip--filter.is-active{background:var(--accent);color:#fff;border-color:var(--accent)}
.header__actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}

/* ========== 按钮 ========== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:700;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.btn--primary{background:var(--accent);color:#fff;box-shadow:0 6px 18px rgba(255,90,31,.28)}
.btn--primary:hover{background:var(--accent-dark);transform:translateY(-2px);box-shadow:0 10px 26px rgba(255,90,31,.34)}
.btn--primary:active{transform:translateY(0)}
.btn--ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.4)}
.btn--ghost:hover{background:#fff;color:var(--ink);transform:translateY(-2px)}
.btn--outline{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn--outline:hover{background:var(--ink);color:#fff;transform:translateY(-2px)}
.btn--sm{height:40px;padding:0 18px;font-size:14px}
.link-underline{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:700;color:var(--ink);
  border-bottom:2px solid var(--accent);padding-bottom:2px;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),gap var(--dur) var(--ease);
}
.link-underline:hover{color:var(--accent);gap:10px}
.link-underline--light{color:#fff;border-color:var(--accent-2)}
.link-underline--light:hover{color:var(--accent-2)}

/* ========== Hero ========== */
.hero{
  position:relative;
  background:var(--ink);
  color:#fff;
  overflow:hidden;
  padding:64px 0 72px;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center right;
  opacity:.34;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:46px 46px;
  opacity:.5;
}
.hero__inner{position:relative;z-index:2;display:flex;align-items:center;gap:56px;min-height:520px}
.hero__copy{flex:1 1 58%;min-width:0}
.hero .eyebrow{color:var(--accent-2)}
.hero .eyebrow::before{background:var(--accent-2)}
.hero h1{
  font-size:clamp(34px,4.6vw,60px);
  font-weight:900;line-height:1.12;letter-spacing:-.02em;
  margin-bottom:20px;
}
.hero h1 em{font-style:normal;color:var(--accent);position:relative;white-space:nowrap}
.hero__sub{font-size:17px;color:rgba(255,255,255,.76);max-width:560px;margin-bottom:26px}
.hero__points{display:flex;flex-direction:column;gap:10px;margin-bottom:32px}
.hero__points li{position:relative;padding-left:24px;font-size:15px;color:rgba(255,255,255,.86)}
.hero__points li::before{
  content:"";position:absolute;left:0;top:9px;
  width:12px;height:12px;border-radius:4px;
  background:var(--accent-2);opacity:.9;
}
.hero__actions{display:flex;align-items:center;gap:24px;flex-wrap:wrap}
.hero__media{flex:0 0 320px;display:flex;justify-content:flex-end}
.portrait-card{
  position:relative;width:320px;aspect-ratio:3/4;
  border-radius:var(--radius-card);overflow:hidden;
  box-shadow:0 24px 60px rgba(0,0,0,.45);
  border:1px solid rgba(255,255,255,.14);
}
.portrait-card img{width:100%;height:100%;object-fit:cover;border-radius:var(--radius-card)}
.portrait-card::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(16,18,22,.86) 0%,rgba(16,18,22,.24) 46%,rgba(16,18,22,.72) 100%);
}
.portrait-card__tag{
  position:absolute;top:16px;left:16px;z-index:3;
  height:26px;display:inline-flex;align-items:center;padding:0 12px;
  border-radius:var(--radius-pill);background:var(--accent-2);color:#04231f;
  font-size:12px;font-weight:800;letter-spacing:.02em;
}
.portrait-card__play{
  position:absolute;right:16px;bottom:44px;z-index:3;
  width:52px;height:52px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:#fff;color:var(--ink);font-size:16px;
  box-shadow:0 8px 24px rgba(0,0,0,.35);
  transition:transform var(--dur) var(--ease);
}
.portrait-card:hover .portrait-card__play{transform:scale(1.08)}
.portrait-card__bar{
  position:absolute;left:0;right:0;bottom:0;height:2px;z-index:3;
  background:linear-gradient(90deg,var(--accent) 0%,var(--accent) 62%,rgba(255,255,255,.22) 62%);
}

/* ========== 数据条 ========== */
.stats{display:flex;flex-wrap:wrap;gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--card)}
.stats__item{flex:1 1 200px;padding:22px 24px;border-right:1px solid var(--line)}
.stats__item:last-child{border-right:0}
.stats__num{font-size:26px;font-weight:900;letter-spacing:-.02em;color:var(--ink)}
.stats__num span{font-size:14px;font-weight:700;color:var(--accent-2);margin-left:4px}
.stats__label{font-size:13px;color:var(--muted);margin-top:2px}

/* ========== 片段卡带 ========== */
.rail{position:relative}
.rail::after{
  content:"";position:absolute;top:0;right:-24px;bottom:0;width:70px;
  background:linear-gradient(90deg,rgba(247,245,241,0),var(--paper));
  pointer-events:none;z-index:3;
}
.rail__track{
  display:flex;gap:20px;overflow-x:auto;padding:4px 4px 16px;
  scroll-snap-type:x mandatory;
  scrollbar-width:none;-ms-overflow-style:none;
}
.rail__track::-webkit-scrollbar{display:none}
.clip-card{
  flex:0 0 220px;scroll-snap-align:start;
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:12px;box-shadow:var(--shadow-1);
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.clip-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#d9d4c9}
.clip-card__media{
  position:relative;aspect-ratio:3/4;border-radius:var(--radius-img);overflow:hidden;
  background:var(--ink-2);
}
.clip-card__media img{width:100%;height:100%;object-fit:cover;transition:transform var(--dur) var(--ease)}
.clip-card:hover .clip-card__media img{transform:scale(1.03)}
.clip-card__badge{
  position:absolute;right:8px;bottom:8px;
  height:22px;padding:0 9px;border-radius:var(--radius-pill);
  background:rgba(16,18,22,.86);color:#fff;
  font-size:12px;font-weight:700;display:inline-flex;align-items:center;
}
.clip-card__title{font-size:15px;font-weight:800;margin-top:12px;line-height:1.4;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.clip-card__data{font-size:13px;color:var(--muted);margin-top:6px}
.clip-card__data b{color:var(--accent-2);font-weight:700}

/* ========== 种草清单 ========== */
.pick-list{border-top:1px solid var(--line)}
.pick-list__item{
  display:flex;align-items:flex-start;gap:24px;
  padding:24px 8px;border-bottom:1px solid var(--line);
  transition:background-color var(--dur) var(--ease),padding-left var(--dur) var(--ease);
}
.pick-list__item:hover{background:var(--card);padding-left:20px}
.pick-list__num{
  flex:0 0 auto;font-size:34px;font-weight:900;letter-spacing:-.03em;
  color:var(--accent);line-height:1;min-width:62px;
  animation:fadeUp .6s var(--ease) both;
}
.pick-list__body{flex:1 1 auto;min-width:0}
.pick-list__body h3{font-size:19px;margin-bottom:6px}
.pick-list__body p{font-size:14px;color:var(--muted);margin:0}
.pick-list__arrow{
  flex:0 0 auto;color:var(--muted-2);font-size:24px;line-height:1;
  transition:transform var(--dur) var(--ease),color var(--dur) var(--ease);
}
.pick-list__item:hover .pick-list__arrow{color:var(--accent);transform:translateX(6px)}

/* ========== 列表卡片 ========== */
.filter-chips{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:32px}
.post-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;height:100%;display:flex;flex-direction:column;
  box-shadow:var(--shadow-1);
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#d9d4c9}
.post-card__cover{display:block;aspect-ratio:16/9;overflow:hidden;background:var(--ink-2);position:relative}
.post-card__cover img{width:100%;height:100%;object-fit:cover;transition:transform var(--dur) var(--ease)}
.post-card:hover .post-card__cover img{transform:scale(1.03)}
.post-card__body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1 1 auto}
.badge{
  display:inline-flex;align-items:center;
  height:22px;padding:0 10px;border-radius:var(--radius-pill);
  font-size:12px;font-weight:700;letter-spacing:.01em;
  background:var(--accent-2-soft);color:#0E7D6E;
}
.badge--accent{background:var(--accent-soft);color:var(--accent-dark)}
.post-card__title{font-size:17px;font-weight:800;line-height:1.45;margin:12px 0 8px}
.post-card__title a{transition:color var(--dur) var(--ease)}
.post-card__title a:hover{color:var(--accent)}
.post-card__excerpt{
  font-size:14px;color:var(--muted);margin:0 0 16px;flex:1 1 auto;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-card__meta{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--muted);padding-top:14px;border-top:1px solid var(--line);
}
.post-card__meta .read{color:var(--accent);font-weight:700}
.list-more{display:flex;justify-content:center;margin-top:36px}
.empty-state{
  text-align:center;padding:56px 24px;background:var(--card);
  border:1px dashed var(--line);border-radius:var(--radius-card);
}
.empty-state__shape{
  display:block;width:72px;height:72px;margin:0 auto 20px;border-radius:18px;
  background:var(--ink-2);
  background-image:linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px);
  background-size:11px 11px;
}
.empty-state p{color:var(--muted);margin-bottom:14px}

/* ========== 口碑条 ========== */
.rail--quote .rail__track{padding-bottom:8px}
.quote-card{
  flex:0 0 288px;height:112px;
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:16px 18px;display:flex;gap:14px;
  box-shadow:var(--shadow-1);
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.quote-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2)}
.quote-card__avatar{
  flex:0 0 auto;width:40px;height:40px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--accent-soft);color:var(--accent-dark);
  font-weight:800;font-size:15px;
}
.quote-card__main{min-width:0;display:flex;flex-direction:column;gap:4px}
.quote-card__name{font-size:14px;font-weight:800}
.stars{color:var(--accent);font-size:12px;letter-spacing:2px;line-height:1}
.quote-card__text{
  font-size:14px;color:var(--muted);line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}

/* ========== 转化区 ========== */
.cta-band{
  position:relative;overflow:hidden;background:var(--ink-2);color:#fff;
  padding:calc(var(--sec-y) * .9) 0;text-align:center;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-3.png");
  background-size:cover;background-position:center;
  filter:brightness(.42) saturate(.9);
}
.cta-band__inner{position:relative;z-index:2;max-width:760px;margin:0 auto}
.cta-band h2{font-size:clamp(28px,3.6vw,44px);font-weight:900;margin-bottom:16px}
.cta-band p{font-size:16px;color:rgba(255,255,255,.78);margin-bottom:30px}
.cta-band__actions{display:flex;align-items:center;justify-content:center;gap:24px;flex-wrap:wrap}

/* ========== FAQ ========== */
.faq{border-top:1px solid var(--line);max-width:900px}
.faq__item{border-bottom:1px solid var(--line)}
.faq__q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;text-align:left;font-size:17px;font-weight:800;color:var(--ink);
  transition:color var(--dur) var(--ease);
}
.faq__q:hover{color:var(--accent)}
.faq__icon{
  flex:0 0 auto;width:22px;height:22px;position:relative;
  transition:transform var(--dur) var(--ease);
}
.faq__icon::before,.faq__icon::after{
  content:"";position:absolute;background:currentColor;border-radius:2px;
}
.faq__icon::before{left:0;right:0;top:10px;height:2px}
.faq__icon::after{top:0;bottom:0;left:10px;width:2px;transition:opacity var(--dur) var(--ease)}
.faq__a{max-height:0;overflow:hidden;transition:max-height var(--dur) var(--ease),padding var(--dur) var(--ease)}
.faq__a p{font-size:15px;color:var(--muted);line-height:1.8;padding:0 4px 18px}
.faq__item.is-open .faq__q{color:var(--accent)}
.faq__item.is-open .faq__icon{transform:rotate(180deg)}
.faq__item.is-open .faq__icon::after{opacity:0}
.faq__item.is-open .faq__a{max-height:320px}

/* ========== 页脚 ========== */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:72px 0 0;font-size:14px}
.footer-grid{display:flex;flex-wrap:wrap;gap:0;margin-left:-12px;margin-right:-12px}
.footer-col{flex:1 1 220px;padding:0 12px;margin-bottom:40px;min-width:0}
.footer-col h4{font-size:14px;font-weight:800;color:#fff;margin-bottom:16px;letter-spacing:.02em}
.footer-col p{font-size:13.5px;line-height:1.8;color:rgba(255,255,255,.62);margin-bottom:12px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{color:rgba(255,255,255,.72);transition:color var(--dur) var(--ease)}
.footer-col a:hover{color:var(--accent)}
.footer-brand{display:inline-flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .brand__mark{width:24px;height:24px}
.footer-brand span{font-size:15px;font-weight:900;color:#fff}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0 28px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom a{color:rgba(255,255,255,.6)}
.footer-bottom a:hover{color:var(--accent)}

/* ========== 动效 ========== */
@keyframes fadeUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}

/* ========== 响应式 ========== */
@media screen and (max-width:1024px){
  :root{--sec-y:72px}
  .hero{padding:52px 0 60px}
  .hero__inner{gap:36px;min-height:auto}
  .hero__media{flex:0 0 264px}
  .portrait-card{width:264px}
  .header__inner{min-height:68px;flex-wrap:wrap;padding-top:10px;padding-bottom:10px;gap:12px}
  .brand{max-width:100%}
  .nav-chips{order:3;flex:1 1 100%;padding-bottom:2px}
  .header__actions{margin-left:auto}
}
@media screen and (max-width:780px){
  .hero__inner{flex-direction:column;align-items:stretch}
  .hero__media{flex:1 1 auto;justify-content:flex-start;margin-top:8px}
  .portrait-card{width:min(300px,100%)}
  .section-head{align-items:flex-start;gap:14px;margin-bottom:28px}
  .section-head__note{max-width:100%}
  .pick-list__num{font-size:28px;min-width:48px}
  .pick-list__item{gap:16px;padding:20px 4px}
  .stats__item{flex:1 1 50%;border-right:0;border-bottom:1px solid var(--line)}
  .stats__item:nth-child(odd){border-right:1px solid var(--line)}
}
@media screen and (max-width:520px){
  body{font-size:15.5px}
  .wrap{padding:0 18px}
  .topbar__inner{justify-content:flex-start;gap:10px;padding:8px 0}
  .topbar__note{font-size:12.5px}
  .hero{padding:40px 0 46px}
  .hero h1{font-size:clamp(28px,8vw,36px)}
  .hero__sub{font-size:15.5px}
  .hero__actions{gap:16px}
  .btn{height:46px;padding:0 22px;font-size:14.5px}
  .clip-card{flex:0 0 190px}
  .quote-card{flex:0 0 250px;height:auto;min-height:104px}
  .rail::after{right:-18px;width:46px}
  .cta-band__actions{gap:16px}
  .footer-grid{margin-left:0;margin-right:0}
  .footer-col{flex:1 1 100%;padding:0}
  .post-card__body{padding:18px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}

/* roulang page: article */
:root{
  --ink:#101216;
  --ink-2:#1B1E24;
  --paper:#F7F5F1;
  --card:#FFFFFF;
  --accent:#FF5A1F;
  --accent-dark:#E34710;
  --accent-2:#16C2A8;
  --line:#E4E0D8;
  --muted:#6B6F76;
  --r-card:16px;
  --r-img:12px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,18,22,.06), 0 8px 24px rgba(16,18,22,.06);
  --sh-2:0 12px 32px rgba(16,18,22,.12);
  --ease:cubic-bezier(.2,.8,.2,1);
  --sec-pad:96px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .25s var(--ease);}
a:hover{color:var(--accent);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:900;letter-spacing:-.02em;line-height:1.22;}
p{margin:0;}
button,input,select,textarea{font:inherit;color:inherit;}
button{background:none;border:0;cursor:pointer;}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px;}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-pill);
  font-weight:700;
  line-height:1;
  white-space:nowrap;
  border:1px solid transparent;
  transition:transform .3s var(--ease),background-color .3s var(--ease),color .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.btn--sm{padding:11px 20px;font-size:14px;}
.btn--md{padding:14px 26px;font-size:15px;}
.btn--lg{padding:17px 34px;font-size:17px;}
.btn--primary{background:var(--accent);color:#fff;box-shadow:0 6px 18px rgba(255,90,31,.28);}
.btn--primary:hover{background:var(--accent-dark);color:#fff;transform:translateY(-2px);box-shadow:0 12px 28px rgba(255,90,31,.32);}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--ink);}
.btn--ghost:hover{border-color:var(--ink);background:var(--ink);color:#fff;transform:translateY(-2px);}
.btn--light{background:#fff;color:var(--ink);}
.btn--light:hover{background:var(--accent);color:#fff;transform:translateY(-2px);}
.link-underline{
  display:inline-block;font-weight:700;font-size:15px;color:var(--accent);
  border-bottom:2px solid var(--accent);padding-bottom:2px;
}
.link-underline:hover{color:var(--accent-dark);border-color:var(--accent-dark);}

/* ---------- badges ---------- */
.badge{
  display:inline-flex;align-items:center;height:22px;padding:0 10px;border-radius:var(--r-pill);
  font-size:12px;font-weight:700;letter-spacing:.02em;line-height:1;
}
.badge--mint{background:rgba(22,194,168,.14);color:#0E8E7C;}
.badge--ink{background:var(--ink);color:#fff;}
.badge--accent{background:var(--accent);color:#fff;}
.badge--ghost{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.3);}
.meta-muted{font-size:13px;color:var(--muted);}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--paper);
  border-bottom:1px solid transparent;
  transition:box-shadow .3s var(--ease),border-color .3s var(--ease),background-color .3s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 6px 22px rgba(16,18,22,.08);background:#fff;}
.header__inner{display:flex;align-items:center;gap:22px;height:74px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;max-width:46%;}
.brand__mark{
  width:16px;height:16px;border-radius:4px;background:var(--accent);
  box-shadow:6px 6px 0 rgba(22,194,168,.85);flex:0 0 auto;
}
.brand__text{font-size:17px;font-weight:900;letter-spacing:-.01em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.nav-chips{
  display:flex;align-items:center;gap:8px;flex:1 1 auto;
  overflow-x:auto;scrollbar-width:none;padding:6px 2px;
}
.nav-chips::-webkit-scrollbar{display:none;}
.chip{
  display:inline-flex;align-items:center;height:36px;padding:0 15px;border-radius:var(--r-pill);
  border:1px solid var(--line);font-size:14px;font-weight:600;color:var(--ink);
  background:transparent;white-space:nowrap;
  transition:background-color .3s var(--ease),color .3s var(--ease),border-color .3s var(--ease),transform .3s var(--ease);
}
.chip:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px);}
.chip.is-active{background:var(--ink);border-color:var(--ink);color:#fff;}
.chip.is-active:hover{color:#fff;}
.header__actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.nav-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:12px;
  align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:16px;height:2px;background:var(--ink);border-radius:2px;}

/* ---------- breadcrumb ---------- */
.page-top{background:var(--ink);color:#fff;position:relative;overflow:hidden;}
.page-top__bg{
  position:absolute;inset:0;
  background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  opacity:.3;
}
.page-top__veil{position:absolute;inset:0;background:linear-gradient(120deg,rgba(16,18,22,.86),rgba(16,18,22,.96));}
.page-top__inner{position:relative;z-index:2;padding:40px 0 58px;}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.66);flex-wrap:wrap;}
.crumbs a{color:rgba(255,255,255,.82);}
.crumbs a:hover{color:var(--accent);}
.crumbs .sep{opacity:.5;}
.crumbs .now{max-width:48ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.article-title{
  margin-top:22px;
  font-size:clamp(28px,4.2vw,46px);
  line-height:1.24;
  color:#fff;
  max-width:22ch;
}
.article-meta{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:22px;}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.4);}
.article-meta span{font-size:13px;color:rgba(255,255,255,.72);}

/* ---------- layout ---------- */
.main{padding:64px 0 0;}
.post-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:56px;align-items:start;}

/* ---------- article body ---------- */
.post-body{max-width:780px;font-size:17px;line-height:1.95;color:#23262C;}
.post-body > *{margin-bottom:1.2em;}
.post-body p{margin:0 0 1.2em;}
.post-body h2{
  position:relative;font-size:30px;line-height:1.3;margin:1.9em 0 .7em;padding-left:16px;
}
.post-body h2::before{
  content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:5px;border-radius:3px;background:var(--accent);
}
.post-body h3{font-size:23px;margin:1.6em 0 .6em;padding-left:14px;position:relative;}
.post-body h3::before{
  content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:4px;border-radius:3px;background:var(--accent-2);
}
.post-body h4{font-size:19px;margin:1.4em 0 .5em;}
.post-body ul,.post-body ol{margin:0 0 1.2em;padding-left:0;}
.post-body ul li,.post-body ol li{position:relative;padding-left:26px;margin-bottom:.55em;}
.post-body ul li::before{
  content:"";position:absolute;left:6px;top:.72em;width:7px;height:7px;border-radius:2px;background:var(--accent);
}
.post-body ol{counter-reset:item;}
.post-body ol li{counter-increment:item;}
.post-body ol li::before{
  content:counter(item,decimal-leading-zero);
  position:absolute;left:0;top:0;font-size:13px;font-weight:800;color:var(--accent-2);line-height:2.4;
}
.post-body blockquote{
  margin:0 0 1.4em;padding:18px 22px;background:#fff;border-left:4px solid var(--accent);
  border-radius:0 var(--r-img) var(--r-img) 0;color:#3A3D44;font-size:16px;
}
.post-body blockquote p:last-child{margin-bottom:0;}
.post-body img{border-radius:var(--r-img);margin:1.4em 0;width:100%;height:auto;}
.post-body figure{margin:1.4em 0;}
.post-body figure figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px;}
.post-body table{width:100%;border-collapse:collapse;font-size:15px;margin:0 0 1.4em;background:#fff;border-radius:var(--r-img);overflow:hidden;}
.post-body th,.post-body td{border:1px solid var(--line);padding:11px 14px;text-align:left;}
.post-body th{background:#F1EEE8;font-weight:800;}
.post-body hr{border:0;border-top:1px solid var(--line);margin:2em 0;}
.post-body strong{font-weight:800;color:var(--ink);}
.post-body a{color:var(--accent);border-bottom:1px solid rgba(255,90,31,.4);}
.post-body a:hover{color:var(--accent-dark);}

.post-empty{
  background:#fff;border:1px dashed var(--line);border-radius:var(--r-card);
  padding:44px 32px;text-align:center;box-shadow:var(--sh-1);
}
.post-empty__title{font-size:24px;font-weight:900;margin-bottom:10px;}
.post-empty p{color:var(--muted);margin-bottom:20px;}

/* ---------- sidebar ---------- */
.side-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--sh-1);margin-bottom:22px;
}
.side-card.is-sticky{position:sticky;top:98px;}
.side-card__title{font-size:16px;font-weight:900;margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.side-card__title::before{content:"";width:4px;height:16px;border-radius:2px;background:var(--accent);}
.side-list li{border-top:1px solid var(--line);}
.side-list li:first-child{border-top:0;}
.side-list a{display:flex;gap:10px;align-items:flex-start;padding:11px 0;font-size:14px;color:#3A3D44;}
.side-list a:hover{color:var(--accent);}
.side-list .idx{font-size:13px;font-weight:800;color:var(--accent-2);line-height:1.8;min-width:22px;}

/* ---------- post nav ---------- */
.postnav{
  display:grid;grid-template-columns:1fr 1fr;gap:16px;
  margin-top:48px;padding-top:32px;border-top:1px solid var(--line);max-width:780px;
}
.postnav a{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:18px 20px;
  box-shadow:var(--sh-1);transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease);
}
.postnav a:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#D8D2C7;color:inherit;}
.postnav .label{font-size:12px;font-weight:800;color:var(--accent-2);letter-spacing:.06em;display:block;margin-bottom:6px;}
.postnav .name{font-size:15px;font-weight:700;color:var(--ink);}

/* ---------- sections ---------- */
.section{padding:var(--sec-pad) 0;}
.section--tight{padding:72px 0;}
.section__head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap;}
.section__eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:800;letter-spacing:.1em;
  color:var(--accent);text-transform:uppercase;margin-bottom:12px;
}
.section__eyebrow::before{content:"";width:22px;height:2px;background:var(--accent);display:block;}
.section__title{font-size:clamp(26px,3.4vw,40px);}
.section__desc{font-size:15px;color:var(--muted);max-width:56ch;margin-top:12px;}

/* ---------- rec cards ---------- */
.rec-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);display:flex;flex-direction:column;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.card__cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--ink-2);}
.card__cover img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .35s var(--ease);}
.card:hover .card__cover img{transform:scale(1.03);}
.card__tag{position:absolute;left:12px;top:12px;}
.card__body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto;}
.card__title{font-size:18px;line-height:1.42;font-weight:800;}
.card__text{font-size:14px;color:var(--muted);line-height:1.7;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:12px;padding-top:6px;}
.card__foot .more{font-size:14px;font-weight:700;color:var(--accent);}

/* ---------- faq ---------- */
.faq-list{max-width:860px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:first-child{border-top:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0;text-align:left;font-size:17px;font-weight:800;color:var(--ink);
  transition:color .3s var(--ease);
}
.faq-q:hover{color:var(--accent);}
.faq-item.is-open .faq-q{color:var(--accent);}
.faq-q .arrow{
  width:12px;height:12px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;
  transform:rotate(45deg);transition:transform .3s var(--ease);flex:0 0 auto;margin-right:4px;
}
.faq-item.is-open .faq-q .arrow{transform:rotate(-135deg);}
.faq-a{display:none;padding:0 0 20px;color:#3A3D44;font-size:15px;line-height:1.8;max-width:72ch;}
.faq-item.is-open .faq-a{display:block;}

/* ---------- cta band ---------- */
.cta-band{position:relative;overflow:hidden;background:var(--ink);color:#fff;text-align:center;}
.cta-band__bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;opacity:.34;}
.cta-band__veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(16,18,22,.72),rgba(16,18,22,.94));}
.cta-band__inner{position:relative;z-index:2;padding:104px 24px;}
.cta-band h2{font-size:clamp(30px,4.6vw,54px);line-height:1.14;margin-bottom:18px;}
.cta-band p{color:rgba(255,255,255,.78);font-size:16px;max-width:56ch;margin:0 auto 30px;}
.cta-actions{display:flex;align-items:center;justify-content:center;gap:24px;flex-wrap:wrap;}
.cta-band .link-underline{color:#fff;border-color:var(--accent);}
.cta-band .link-underline:hover{color:var(--accent);}
.cta-stats{display:flex;justify-content:center;gap:44px;flex-wrap:wrap;margin-top:56px;padding-top:34px;border-top:1px solid rgba(255,255,255,.14);}
.cta-stats .num{font-size:30px;font-weight:900;letter-spacing:-.02em;color:var(--accent-2);display:block;line-height:1.2;}
.cta-stats .txt{font-size:13px;color:rgba(255,255,255,.66);}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:80px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:44px;padding-bottom:56px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:900;font-size:17px;margin-bottom:16px;}
.footer-brand .brand__mark{width:14px;height:14px;}
.footer-col h4{font-size:14px;font-weight:800;color:#fff;margin-bottom:18px;letter-spacing:.02em;}
.footer-col p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);}
.footer-col ul li{margin-bottom:11px;}
.footer-col ul a{font-size:14px;color:rgba(255,255,255,.68);}
.footer-col ul a:hover{color:var(--accent);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:24px 0 30px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  :root{--sec-pad:72px;}
  .post-layout{grid-template-columns:minmax(0,1fr);gap:44px;}
  .side-card.is-sticky{position:static;}
  .rec-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .header__inner{height:68px;gap:16px;}
  .brand{max-width:40%;}
  .brand__text{font-size:15px;}
}
@media (max-width:768px){
  :root{--sec-pad:56px;}
  .nav-toggle{display:flex;}
  .nav-chips{
    position:absolute;left:0;right:0;top:100%;
    background:#fff;border-bottom:1px solid var(--line);
    padding:14px 24px 18px;gap:10px;flex-wrap:wrap;
    display:none;box-shadow:0 14px 28px rgba(16,18,22,.1);
  }
  .nav-chips.is-open{display:flex;}
  .site-header{position:sticky;}
  .header__inner{position:relative;}
  .brand{max-width:52%;}
  .article-title{max-width:none;font-size:clamp(24px,6vw,32px);}
  .page-top__inner{padding:30px 0 44px;}
  .main{padding:44px 0 0;}
  .post-body{font-size:16px;line-height:1.9;}
  .post-body h2{font-size:24px;}
  .post-body h3{font-size:20px;}
  .postnav{grid-template-columns:1fr;}
  .rec-grid{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .cta-band__inner{padding:72px 24px;}
  .cta-stats{gap:28px;}
  .footer-bottom{font-size:12px;}
}
@media (max-width:520px){
  .wrap{padding:0 18px;}
  .brand__text{font-size:14px;}
  .btn--lg{padding:15px 26px;font-size:16px;}
  .post-empty{padding:32px 20px;}
  .article-meta{gap:10px;}
  .crumbs .now{max-width:30ch;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;}
  .card:hover,.btn:hover,.postnav a:hover{transform:none;}
}

/* roulang page: category1 */
:root{
  --ink:#101216;
  --ink-2:#1B1E24;
  --ink-3:#252932;
  --paper:#F7F5F1;
  --card:#FFFFFF;
  --accent:#FF5A1F;
  --accent-dark:#E4450E;
  --accent-2:#16C2A8;
  --line:#E4E0D8;
  --line-dark:rgba(255,255,255,.12);
  --muted:#6B6F76;
  --muted-2:#9AA0A6;
  --radius-lg:16px;
  --radius-md:12px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(16,18,22,.06),0 8px 24px rgba(16,18,22,.06);
  --shadow-2:0 12px 32px rgba(16,18,22,.12);
  --ease:cubic-bezier(.2,.8,.2,1);
  --sec-pad:96px;
  --wrap:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,"Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius-md);object-fit:cover;}
a{color:inherit;text-decoration:none;transition:color .25s var(--ease),opacity .25s var(--ease);}
a:hover{color:var(--accent);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px;}
::selection{background:var(--accent);color:#fff;}

/* Foundation 覆盖 */
.accordion,.accordion-item,.accordion-title,.accordion-content{background:transparent;border:0;margin:0;}
.accordion-title{border:0;padding:0;font-size:17px;color:var(--ink);}
.accordion-content{padding:0;border:0;color:var(--muted);}
.button,button{cursor:pointer;}

.wrap{
  width:100%;
  max-width:var(--wrap);
  margin:0 auto;
  padding:0 24px;
}
.section{padding:var(--sec-pad) 0;}
.section--tight{padding:64px 0;}

/* 顶部细条 */
.topbar{
  background:var(--ink);
  color:rgba(255,255,255,.72);
  font-size:13px;
}
.topbar__inner{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:16px;
  min-height:38px;
  flex-wrap:wrap;
}
.topbar__inner a{color:rgba(255,255,255,.9);border-bottom:1px solid rgba(255,255,255,.3);}
.topbar__inner a:hover{color:var(--accent);}

/* 导航 */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(247,245,241,.94);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid transparent;
  transition:border-color .3s var(--ease),box-shadow .3s var(--ease),background .3s var(--ease);
}
.site-header.is-stuck{
  border-bottom-color:var(--line);
  box-shadow:0 6px 20px rgba(16,18,22,.07);
  background:rgba(247,245,241,.98);
}
.header__inner{
  display:flex;
  align-items:center;
  gap:20px;
  min-height:72px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
  color:var(--ink);
  font-weight:800;
  letter-spacing:-.02em;
  white-space:nowrap;
}
.brand:hover{color:var(--ink);}
.brand__mark{
  width:14px;height:14px;
  border-radius:4px;
  background:var(--accent);
  box-shadow:6px -6px 0 -3px var(--accent-2);
  flex-shrink:0;
}
.brand__text{font-size:17px;}
.nav-chips{
  display:flex;
  align-items:center;
  gap:8px;
  margin-left:auto;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
  padding:4px 0;
}
.nav-chips::-webkit-scrollbar{display:none;}
.chip{
  display:inline-flex;
  align-items:center;
  height:34px;
  padding:0 14px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:transparent;
  color:var(--muted);
  font-size:14px;
  white-space:nowrap;
  transition:all .3s var(--ease);
}
.chip:hover{border-color:var(--ink);color:var(--ink);background:#fff;}
.chip.is-active,
.chip.is-current{background:var(--ink);border-color:var(--ink);color:#fff;}
.chip.is-current:hover{color:#fff;}
.header__actions{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.nav-fade{position:relative;}
.nav-fade::after{
  content:"";
  position:absolute;top:0;right:0;bottom:0;width:38px;
  background:linear-gradient(90deg,rgba(247,245,241,0),rgba(247,245,241,.96));
  pointer-events:none;
  border-radius:0 var(--radius-pill) var(--radius-pill) 0;
}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 24px;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  font-size:15px;
  font-weight:700;
  letter-spacing:-.01em;
  transition:transform .3s var(--ease),background .3s var(--ease),color .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.btn--primary{background:var(--accent);color:#fff;box-shadow:var(--shadow-1);}
.btn--primary:hover{background:var(--accent-dark);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-2);}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--ink);}
.btn--ghost:hover{border-color:var(--ink);color:var(--ink);transform:translateY(-2px);}
.btn--light{background:#fff;color:var(--ink);}
.btn--light:hover{background:#fff;color:var(--accent-dark);transform:translateY(-2px);}
.btn--sm{height:38px;padding:0 18px;font-size:14px;}
.link-underline{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-weight:700;
  color:var(--ink);
  border-bottom:2px solid var(--accent);
  padding-bottom:2px;
}
.link-underline:hover{color:var(--accent);}
.more-link{display:inline-flex;align-items:center;gap:8px;font-weight:700;color:var(--accent);}
.more-link i{transition:transform .3s var(--ease);}
.more-link:hover i{transform:translateX(4px);}

/* 徽章与标签 */
.badge{
  display:inline-flex;
  align-items:center;
  height:22px;
  padding:0 10px;
  border-radius:var(--radius-pill);
  background:rgba(22,194,168,.12);
  color:#0E8C7A;
  font-size:12px;
  font-weight:700;
  line-height:1;
  white-space:nowrap;
}
.badge--accent{background:rgba(255,90,31,.12);color:var(--accent-dark);}
.badge--dark{background:rgba(255,255,255,.14);color:#fff;}

/* 面包屑 */
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--muted);
  margin-bottom:18px;
}
.crumb a{border-bottom:1px solid transparent;}
.crumb a:hover{border-bottom-color:var(--accent);}
.crumb span.sep{color:var(--muted-2);}

/* 分类页头 */
.page-hero{
  background:var(--paper);
  padding:56px 0 0;
  position:relative;
  overflow:hidden;
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:100%;
  background-image:radial-gradient(rgba(16,18,22,.06) 1px,transparent 1px);
  background-size:18px 18px;
  opacity:.7;
  pointer-events:none;
}
.page-hero .wrap{position:relative;}
.page-hero h1{
  font-size:clamp(34px,4.4vw,56px);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.16;
  max-width:900px;
}
.page-hero .lede{
  margin-top:20px;
  max-width:760px;
  font-size:17px;
  color:var(--muted);
  line-height:1.85;
}
.page-hero__head{max-width:900px;}
.page-hero .badge{margin-bottom:16px;}
.hero-facts{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:16px;
  margin-top:36px;
  max-width:860px;
}
.fact{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:18px 20px;
  box-shadow:var(--shadow-1);
}
.fact b{
  display:block;
  font-size:26px;
  font-weight:900;
  letter-spacing:-.02em;
  color:var(--ink);
}
.fact span{font-size:13px;color:var(--muted);}

/* 横幅 */
.banner-wrap{margin-top:40px;}
.banner{
  width:100%;
  aspect-ratio:21/9;
  border-radius:var(--radius-lg);
  border:1px solid var(--line);
  position:relative;
}
.banner-frame{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-1);}
.banner-frame::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(16,18,22,.72),rgba(16,18,22,.18) 62%,rgba(16,18,22,.5));
}
.banner-cap{
  position:absolute;
  left:28px;
  bottom:24px;
  z-index:2;
  color:#fff;
  max-width:560px;
}
.banner-cap strong{display:block;font-size:22px;font-weight:900;letter-spacing:-.02em;}
.banner-cap span{display:block;font-size:14px;color:rgba(255,255,255,.82);margin-top:6px;}

/* 筛选 */
.filter-bar{
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
  padding:28px 0 0;
}
.filter-bar .label{
  font-size:13px;
  color:var(--muted);
  margin-right:4px;
}
.filter-chip{
  display:inline-flex;
  align-items:center;
  height:34px;
  padding:0 16px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:var(--card);
  color:var(--muted);
  font-size:14px;
  cursor:pointer;
  transition:all .3s var(--ease);
}
.filter-chip:hover{border-color:var(--ink);color:var(--ink);}
.filter-chip.is-on{background:var(--accent);border-color:var(--accent);color:#fff;}

/* 板块标题 */
.sec-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
  margin-bottom:36px;
}
.sec-head h2{
  font-size:clamp(26px,3vw,38px);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.2;
}
.sec-head .kicker{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:700;
  color:var(--accent);
  letter-spacing:.08em;
  text-transform:uppercase;
  margin-bottom:10px;
}
.sec-head .kicker::before{content:"";width:22px;height:2px;background:var(--accent);border-radius:2px;}
.sec-head p{color:var(--muted);font-size:15px;max-width:560px;}

/* 卡片网格 */
.card-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.card{
  display:flex;
  flex-direction:column;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#d6d1c7;}
.card__media{
  position:relative;
  overflow:hidden;
  background:var(--ink-2);
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:16px 16px;
}
.card__media img{
  width:100%;
  aspect-ratio:16/9;
  border-radius:0;
  transition:transform .5s var(--ease);
}
.card:hover .card__media img{transform:scale(1.03);}
.card__tag{
  position:absolute;
  top:12px;
  left:12px;
  z-index:2;
}
.card__tag .badge{background:rgba(16,18,22,.76);color:#fff;backdrop-filter:blur(4px);}
.card__body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card__body h3{
  font-size:19px;
  font-weight:800;
  letter-spacing:-.01em;
  line-height:1.4;
}
.card__body p{
  font-size:14px;
  color:var(--muted);
  line-height:1.75;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.card__meta{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:auto;
  padding-top:12px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--muted);
}
.card__meta .go{color:var(--accent);font-weight:700;display:inline-flex;align-items:center;gap:6px;}
.card__meta .go i{transition:transform .3s var(--ease);}
.card:hover .card__meta .go i{transform:translateX(3px);}

/* 深色检查清单 */
.panel-dark{
  background:var(--ink);
  color:#fff;
  border-radius:24px;
  padding:56px;
  position:relative;
  overflow:hidden;
}
.panel-dark::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(255,255,255,.08) 1px,transparent 1px);
  background-size:22px 22px;
  pointer-events:none;
}
.panel-dark > *{position:relative;}
.panel-dark h2{
  font-size:clamp(26px,3vw,38px);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.2;
}
.panel-dark .sub{color:rgba(255,255,255,.68);margin-top:14px;max-width:620px;font-size:15px;}
.check-list{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:14px 32px;
  margin-top:36px;
}
.check-item{
  display:flex;
  gap:14px;
  align-items:flex-start;
  padding:16px 0;
  border-top:1px solid var(--line-dark);
}
.check-item i{
  color:var(--accent-2);
  margin-top:5px;
}
.check-item b{display:block;font-size:16px;font-weight:800;}
.check-item span{display:block;font-size:14px;color:rgba(255,255,255,.66);margin-top:4px;line-height:1.7;}

/* 步骤时间线 */
.steps{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:24px;
}
.step{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:24px;
  box-shadow:var(--shadow-1);
  display:flex;
  flex-direction:column;
  gap:10px;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.step .num{
  font-size:34px;
  font-weight:900;
  letter-spacing:-.02em;
  color:var(--accent);
  line-height:1;
}
.step h3{font-size:17px;font-weight:800;}
.step p{font-size:14px;color:var(--muted);}

/* FAQ */
.faq-wrap{max-width:880px;}
.accordion-item{border-bottom:1px solid var(--line);}
.accordion-title{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  width:100%;
  padding:20px 0;
  border:0;
  background:transparent;
  text-align:left;
  font-size:17px;
  font-weight:800;
  color:var(--ink);
  transition:color .3s var(--ease);
}
.accordion-title:hover{color:var(--accent);}
.accordion-title .ico{
  flex-shrink:0;
  width:28px;height:28px;
  border-radius:50%;
  border:1px solid var(--line);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:var(--muted);
  font-size:12px;
  transition:transform .35s var(--ease),color .3s var(--ease),border-color .3s var(--ease),background .3s var(--ease);
}
.accordion-item.is-open .accordion-title{color:var(--accent);}
.accordion-item.is-open .accordion-title .ico{
  transform:rotate(180deg);
  background:var(--accent);
  border-color:var(--accent);
  color:#fff;
}
.accordion-content{
  display:none;
  padding:0 0 20px;
  font-size:15px;
  color:var(--muted);
  line-height:1.8;
  max-width:760px;
}
.accordion-item.is-open .accordion-content{display:block;}

/* CTA */
.cta-band{
  position:relative;
  border-radius:24px;
  overflow:hidden;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  color:#fff;
  text-align:center;
  padding:80px 32px;
}
.cta-band::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(16,18,22,.9),rgba(16,18,22,.66));
}
.cta-band > *{position:relative;z-index:2;}
.cta-band h2{
  font-size:clamp(28px,3.4vw,44px);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.2;
}
.cta-band p{margin-top:16px;color:rgba(255,255,255,.74);font-size:16px;}
.cta-actions{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:20px;
  flex-wrap:wrap;
  margin-top:32px;
}
.cta-actions .link-underline{color:#fff;border-bottom-color:var(--accent-2);}
.cta-actions .link-underline:hover{color:var(--accent-2);}

/* 订阅表单 */
.sub-form{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
  max-width:520px;
  margin-top:24px;
}
.sub-form input{
  flex:1 1 240px;
  height:46px;
  padding:0 16px;
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  background:#fff;
  color:var(--ink);
  font-size:15px;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.sub-form input::placeholder{color:var(--muted-2);}
.sub-form input:focus{
  outline:none;
  border-color:var(--accent);
  box-shadow:0 0 0 2px rgba(255,90,31,.35);
}
.form-hint{font-size:13px;color:var(--accent);margin-top:8px;}

/* 页脚 */
.site-footer{
  background:var(--ink);
  color:rgba(255,255,255,.7);
  margin-top:96px;
  padding:72px 0 0;
  font-size:14px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  color:#fff;
  font-size:17px;
  font-weight:800;
  letter-spacing:-.02em;
  margin-bottom:16px;
}
.footer-col h4{
  color:#fff;
  font-size:14px;
  font-weight:800;
  margin-bottom:16px;
}
.footer-col ul li{margin-bottom:10px;}
.footer-col a{color:rgba(255,255,255,.68);}
.footer-col a:hover{color:var(--accent);}
.footer-col p{color:rgba(255,255,255,.6);line-height:1.8;}
.footer-bottom{
  border-top:1px solid var(--line-dark);
  padding:22px 0 28px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:rgba(255,255,255,.5);
}

/* 响应式 */
@media (max-width:1024px){
  :root{--sec-pad:72px;}
  .header__inner{flex-wrap:wrap;padding-top:10px;padding-bottom:10px;gap:12px;}
  .nav-chips{margin-left:0;order:3;width:100%;}
  .nav-fade::after{display:none;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
  .panel-dark{padding:40px;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
}
@media (max-width:640px){
  :root{--sec-pad:56px;}
  body{font-size:15px;}
  .wrap{padding:0 18px;}
  .page-hero{padding-top:36px;}
  .page-hero h1{font-size:clamp(28px,8vw,36px);}
  .hero-facts{grid-template-columns:1fr;gap:12px;}
  .banner{aspect-ratio:16/9;}
  .banner-cap{left:18px;bottom:16px;}
  .banner-cap strong{font-size:18px;}
  .card-grid{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .check-list{grid-template-columns:1fr;gap:0;}
  .panel-dark{padding:28px 22px;border-radius:18px;}
  .cta-band{padding:56px 20px;border-radius:18px;}
  .footer-grid{grid-template-columns:1fr;}
  .sec-head h2{font-size:26px;}
  .brand__text{font-size:15px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  .card:hover,.step:hover,.btn:hover{transform:none;}
}

/* roulang page: category2 */
:root{
  --ink:#101216;
  --ink-2:#1B1E24;
  --paper:#F7F5F1;
  --card:#FFFFFF;
  --accent:#FF5A1F;
  --accent-dark:#E04711;
  --accent-2:#16C2A8;
  --line:#E4E0D8;
  --muted:#6B6F76;
  --radius-card:16px;
  --radius-img:12px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(16,18,22,.06),0 8px 24px rgba(16,18,22,.06);
  --shadow-2:0 12px 32px rgba(16,18,22,.12);
  --ease:cubic-bezier(.2,.8,.2,1);
  --sec-pad:96px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
a:hover{color:var(--accent);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
button{font-family:inherit;cursor:pointer;}
:focus-visible{outline:3px solid rgba(255,90,31,.45);outline-offset:2px;border-radius:6px;}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ---------- 顶部细条 ---------- */
.topbar{
  background:var(--ink);
  color:#C9C6BF;
  font-size:13px;
  line-height:1;
}
.topbar .wrap{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:16px;
  min-height:38px;
  flex-wrap:wrap;
}
.topbar span{color:#8E8B85;}
.topbar a{color:#fff;border-bottom:1px solid rgba(255,255,255,.35);padding-bottom:1px;}
.topbar a:hover{color:var(--accent);border-color:var(--accent);}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(247,245,241,.94);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid transparent;
  transition:border-color .3s var(--ease),box-shadow .3s var(--ease),background .3s var(--ease);
}
.site-header.is-stuck{
  border-bottom-color:var(--line);
  box-shadow:0 6px 20px rgba(16,18,22,.07);
  background:rgba(247,245,241,.98);
}
.header__inner{
  display:flex;
  align-items:center;
  gap:18px;
  min-height:74px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  max-width:320px;
}
.brand__mark{
  width:22px;height:22px;
  flex:0 0 22px;
  border-radius:6px;
  background:linear-gradient(135deg,var(--accent) 0%,var(--accent) 48%,var(--ink) 48%,var(--ink) 100%);
  position:relative;
  transform:rotate(-4deg);
}
.brand__mark::after{
  content:"";
  position:absolute;inset:6px;
  background:var(--paper);
  border-radius:2px;
}
.brand__text{
  font-size:17px;
  font-weight:800;
  letter-spacing:-.02em;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.nav-chips{
  display:flex;
  align-items:center;
  gap:8px;
  flex:1 1 auto;
  overflow-x:auto;
  scrollbar-width:none;
  padding:6px 2px;
  -webkit-overflow-scrolling:touch;
}
.nav-chips::-webkit-scrollbar{display:none;}
.chip{
  display:inline-flex;
  align-items:center;
  height:36px;
  padding:0 16px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:transparent;
  color:var(--muted);
  font-size:14px;
  font-weight:600;
  white-space:nowrap;
  transition:color .3s var(--ease),background .3s var(--ease),border-color .3s var(--ease),transform .3s var(--ease);
}
.chip:hover{color:var(--ink);border-color:#CFC9BD;background:#fff;transform:translateY(-1px);}
.chip.is-active{
  background:var(--ink);
  border-color:var(--ink);
  color:#fff;
}
.header__actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 26px;
  border:1px solid transparent;
  border-radius:var(--radius-pill);
  font-size:15px;
  font-weight:700;
  letter-spacing:.01em;
  transition:background .3s var(--ease),color .3s var(--ease),transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.btn--primary{background:var(--accent);color:#fff;box-shadow:0 6px 18px rgba(255,90,31,.24);}
.btn--primary:hover{background:var(--accent-dark);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(255,90,31,.3);}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--line);}
.btn--ghost:hover{border-color:var(--ink);color:var(--ink);transform:translateY(-2px);}
.btn--light{background:#fff;color:var(--ink);}
.btn--light:hover{background:#fff;color:var(--accent);transform:translateY(-2px);}
.btn--sm{height:38px;padding:0 18px;font-size:14px;}
.link-underline{
  font-size:15px;
  font-weight:700;
  color:var(--ink);
  border-bottom:2px solid var(--accent);
  padding-bottom:2px;
  transition:color .3s var(--ease);
}
.link-underline:hover{color:var(--accent);}

/* ---------- 分类页头 ---------- */
.cat-hero{
  background:var(--paper);
  padding:44px 0 0;
}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--muted);
  margin-bottom:22px;
  flex-wrap:wrap;
}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--accent);}
.breadcrumb .sep{color:#C4BFB5;}
.breadcrumb .now{color:var(--ink);font-weight:600;}
.cat-hero__inner{
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
  gap:40px;
  align-items:end;
  padding-bottom:40px;
}
.cat-hero h1{
  font-size:clamp(34px,4.4vw,60px);
  font-weight:900;
  line-height:1.12;
  letter-spacing:-.02em;
  margin-bottom:18px;
}
.cat-hero h1 em{font-style:normal;color:var(--accent);}
.cat-hero__lead{
  font-size:17px;
  color:#3C4046;
  max-width:52ch;
  line-height:1.9;
}
.cat-hero__tags{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:22px;
}
.tag-pill{
  display:inline-flex;
  align-items:center;
  height:30px;
  padding:0 14px;
  border-radius:var(--radius-pill);
  background:#fff;
  border:1px solid var(--line);
  font-size:13px;
  font-weight:600;
  color:var(--muted);
}
.tag-pill--teal{background:rgba(22,194,168,.1);border-color:rgba(22,194,168,.35);color:#0E8F7C;}
.cat-hero__stats{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:14px;
}
.stat{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:18px 20px;
  box-shadow:var(--shadow-1);
}
.stat b{
  display:block;
  font-size:26px;
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.2;
}
.stat span{font-size:13px;color:var(--muted);}
.stat--accent b{color:var(--accent);}
.stat--teal b{color:#0E8F7C;}

.cat-banner{
  position:relative;
  border-radius:var(--radius-card);
  overflow:hidden;
  aspect-ratio:21/9;
  background:var(--ink-2);
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:26px 26px;
  margin-bottom:0;
}
.cat-banner img{
  width:100%;height:100%;
  object-fit:cover;
  border-radius:var(--radius-card);
}
.cat-banner__mask{
  position:absolute;inset:0;
  background:linear-gradient(115deg,rgba(16,18,22,.82) 6%,rgba(16,18,22,.42) 52%,rgba(16,18,22,.16) 100%);
}
.cat-banner__cap{
  position:absolute;
  left:28px;right:28px;bottom:24px;
  color:#fff;
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:18px;
  flex-wrap:wrap;
}
.cat-banner__cap h2{
  font-size:clamp(20px,2.4vw,28px);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.25;
}
.cat-banner__cap p{font-size:14px;color:rgba(255,255,255,.78);margin-top:6px;}

/* ---------- 板块 ---------- */
.section{padding:var(--sec-pad) 0;}
.section--tight{padding:56px 0 var(--sec-pad);}
.section__head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:38px;
  flex-wrap:wrap;
}
.section__head h2{
  font-size:clamp(26px,3vw,38px);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.2;
}
.section__head p{
  color:var(--muted);
  font-size:15px;
  margin-top:10px;
  max-width:56ch;
}
.section__mark{
  display:block;
  width:44px;height:4px;
  border-radius:2px;
  background:var(--accent);
  margin-bottom:16px;
}

/* ---------- 筛选 chip ---------- */
.filter-bar{
  display:flex;
  gap:10px;
  overflow-x:auto;
  padding:4px 2px 14px;
  scrollbar-width:none;
  position:relative;
}
.filter-bar::-webkit-scrollbar{display:none;}
.fchip{
  display:inline-flex;
  align-items:center;
  height:38px;
  padding:0 18px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line);
  background:#fff;
  color:var(--muted);
  font-size:14px;
  font-weight:600;
  white-space:nowrap;
  transition:color .3s var(--ease),background .3s var(--ease),border-color .3s var(--ease);
}
.fchip:hover{color:var(--ink);border-color:#CFC9BD;}
.fchip.is-active{background:var(--accent);border-color:var(--accent);color:#fff;}

/* ---------- 分类页 2 主体：两列大卡 + 侧栏 ---------- */
.cat-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 320px;
  gap:36px;
  align-items:start;
}
.big-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}
.big-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-1);
  display:flex;
  flex-direction:column;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease);
}
.big-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.big-card__cover{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
  background:var(--ink-2);
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:22px 22px;
}
.big-card__cover img{
  width:100%;height:100%;
  object-fit:cover;
  border-radius:0;
  transition:transform .5s var(--ease);
}
.big-card:hover .big-card__cover img{transform:scale(1.03);}
.badge{
  display:inline-flex;
  align-items:center;
  height:22px;
  padding:0 10px;
  border-radius:var(--radius-pill);
  font-size:12px;
  font-weight:700;
  letter-spacing:.02em;
}
.badge--teal{background:rgba(22,194,168,.14);color:#0E8F7C;}
.badge--accent{background:rgba(255,90,31,.13);color:#C93F0B;}
.badge--ink{background:rgba(16,18,22,.86);color:#fff;}
.big-card__cover .badge{position:absolute;top:14px;left:14px;}
.big-card__body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1 1 auto;}
.big-card__body h3{
  font-size:21px;
  font-weight:800;
  letter-spacing:-.01em;
  line-height:1.4;
  margin-bottom:10px;
}
.big-card__body p{
  font-size:15px;
  color:#4A4E54;
  line-height:1.8;
  margin-bottom:16px;
}
.card-facts{
  display:flex;
  flex-wrap:wrap;
  gap:8px 16px;
  margin-bottom:18px;
  font-size:13px;
  color:var(--muted);
}
.card-facts b{color:#0E8F7C;font-weight:700;}
.big-card__foot{
  margin-top:auto;
  padding-top:16px;
  border-top:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
}
.big-card__foot .meta{font-size:13px;color:var(--muted);}
.card-link{
  font-size:14px;
  font-weight:700;
  color:var(--ink);
  display:inline-flex;
  align-items:center;
  gap:6px;
  transition:color .3s var(--ease),gap .3s var(--ease);
}
.card-link::after{content:"→";font-size:14px;}
.card-link:hover{color:var(--accent);gap:10px;}

/* ---------- 侧栏 ---------- */
.side{position:sticky;top:96px;display:grid;gap:20px;}
.panel{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:24px;
  box-shadow:var(--shadow-1);
}
.panel h3{
  font-size:18px;
  font-weight:800;
  letter-spacing:-.01em;
  margin-bottom:6px;
}
.panel .panel__note{font-size:13px;color:var(--muted);margin-bottom:18px;}
.point-list li{
  display:flex;
  gap:12px;
  padding:14px 0;
  border-bottom:1px solid var(--line);
  font-size:14px;
  line-height:1.7;
  color:#3C4046;
}
.point-list li:last-child{border-bottom:0;padding-bottom:0;}
.point-list li:first-child{padding-top:0;}
.point-list .num{
  flex:0 0 26px;
  height:26px;
  border-radius:8px;
  background:rgba(255,90,31,.1);
  color:var(--accent);
  font-size:12px;
  font-weight:800;
  display:flex;
  align-items:center;
  justify-content:center;
}
.panel--dark{
  background:var(--ink);
  border-color:var(--ink);
  color:#fff;
}
.panel--dark h3{color:#fff;}
.panel--dark .panel__note{color:rgba(255,255,255,.6);}
.panel--dark .point-list li{border-bottom-color:rgba(255,255,255,.14);color:rgba(255,255,255,.82);}
.panel--dark .point-list .num{background:rgba(22,194,168,.2);color:#5FE3CF;}
.mini-rows li{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:12px 0;
  border-bottom:1px solid var(--line);
  font-size:14px;
}
.mini-rows li:last-child{border-bottom:0;padding-bottom:0;}
.mini-rows span{color:var(--muted);font-size:13px;}
.mini-rows a{font-weight:600;}
.mini-rows a:hover{color:var(--accent);}

/* ---------- HUD 路径 ---------- */
.section--hud{padding:0 0 var(--sec-pad);}
.hud{
  background:var(--ink);
  border-radius:var(--radius-card);
  padding:48px 44px;
  color:#fff;
  position:relative;
  overflow:hidden;
}
.hud::before{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:30px 30px;
  opacity:.7;
  pointer-events:none;
}
.hud > *{position:relative;}
.hud__head{max-width:60ch;margin-bottom:34px;}
.hud__head h2{
  font-size:clamp(24px,2.8vw,34px);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.25;
}
.hud__head p{color:rgba(255,255,255,.66);font-size:15px;margin-top:12px;}
.hud-steps{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:18px;
  margin-bottom:34px;
}
.hud-step{
  border:1px solid rgba(255,255,255,.16);
  border-radius:14px;
  padding:20px;
  background:rgba(255,255,255,.03);
  transition:border-color .3s var(--ease),background .3s var(--ease),transform .3s var(--ease);
}
.hud-step:hover{border-color:rgba(255,90,31,.6);background:rgba(255,90,31,.08);transform:translateY(-3px);}
.hud-step em{
  font-style:normal;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:30px;height:30px;
  border-radius:9px;
  background:var(--accent);
  color:#fff;
  font-size:13px;
  font-weight:800;
  margin-bottom:14px;
}
.hud-step h4{font-size:16px;font-weight:800;margin-bottom:8px;letter-spacing:-.01em;}
.hud-step p{font-size:13.5px;color:rgba(255,255,255,.64);line-height:1.75;}
.hud-metrics{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:18px;
  padding-top:28px;
  border-top:1px solid rgba(255,255,255,.14);
}
.hud-metric b{
  display:block;
  font-size:clamp(24px,2.6vw,32px);
  font-weight:900;
  letter-spacing:-.02em;
  color:var(--accent-2);
  line-height:1.2;
}
.hud-metric span{font-size:13px;color:rgba(255,255,255,.6);}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);}
.faq-list .accordion-item{border-bottom:1px solid var(--line);}
.faq-list .accordion-title{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:22px 0;
  font-size:17px;
  font-weight:700;
  color:var(--ink);
  border:0;
  background:transparent;
  transition:color .3s var(--ease);
}
.faq-list .accordion-title:hover{color:var(--accent);}
.faq-list .accordion-title::after{
  content:"";
  flex:0 0 12px;
  width:12px;height:12px;
  border-right:2px solid var(--muted);
  border-bottom:2px solid var(--muted);
  transform:rotate(45deg);
  transition:transform .32s var(--ease),border-color .3s var(--ease);
  margin-top:-4px;
}
.faq-list .accordion-item.is-active .accordion-title{color:var(--accent);}
.faq-list .accordion-item.is-active .accordion-title::after{
  transform:rotate(-135deg);
  border-color:var(--accent);
  margin-top:4px;
}
.faq-list .accordion-content{
  padding:0 0 20px;
  border:0;
  background:transparent;
  font-size:15.5px;
  line-height:1.85;
  color:#4A4E54;
}
.faq-list .accordion-content p{max-width:70ch;}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;
  overflow:hidden;
  background-color:var(--ink);
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  padding:96px 0;
  text-align:center;
  color:#fff;
}
.cta-band__mask{
  position:absolute;inset:0;
  background:linear-gradient(160deg,rgba(16,18,22,.9) 0%,rgba(16,18,22,.76) 55%,rgba(16,18,22,.9) 100%);
}
.cta-band .wrap{position:relative;}
.cta-band h2{
  font-size:clamp(28px,4vw,52px);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.18;
  margin-bottom:16px;
}
.cta-band p{
  font-size:16px;
  color:rgba(255,255,255,.76);
  max-width:56ch;
  margin:0 auto 32px;
}
.cta-band__actions{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:22px;
  flex-wrap:wrap;
}
.cta-band .link-underline{color:#fff;border-color:var(--accent-2);}
.cta-band .link-underline:hover{color:var(--accent-2);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:#B9B6B0;padding:76px 0 0;font-size:14px;}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.1fr;
  gap:40px;
  padding-bottom:52px;
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  color:#fff;
  font-size:16px;
  font-weight:800;
  letter-spacing:-.01em;
  margin-bottom:16px;
}
.footer-brand .brand__mark{width:20px;height:20px;flex:0 0 20px;}
.footer-brand .brand__mark::after{inset:5px;background:var(--ink);}
.footer-col p{line-height:1.85;color:#95928C;}
.footer-col h4{
  color:#fff;
  font-size:14px;
  font-weight:800;
  letter-spacing:.02em;
  margin-bottom:18px;
}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a{color:#B9B6B0;transition:color .3s var(--ease);}
.footer-col ul a:hover{color:var(--accent);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0 30px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  flex-wrap:wrap;
  font-size:13px;
  color:#8E8B85;
}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  :root{--sec-pad:72px;}
  .cat-hero__inner{grid-template-columns:1fr;gap:28px;align-items:start;}
  .cat-layout{grid-template-columns:1fr;gap:28px;}
  .side{position:static;}
  .hud-steps{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:860px){
  .header__inner{min-height:66px;gap:12px;}
  .brand{max-width:44vw;}
  .brand__text{font-size:15px;}
  .nav-chips{
    mask-image:linear-gradient(90deg,#000 0,#000 88%,transparent 100%);
    -webkit-mask-image:linear-gradient(90deg,#000 0,#000 88%,transparent 100%);
  }
  .big-grid{grid-template-columns:1fr;}
}
@media (max-width:640px){
  :root{--sec-pad:56px;}
  .wrap{padding:0 18px;}
  .header__actions .btn{padding:0 14px;}
  .cat-hero{padding-top:28px;}
  .cat-hero h1{margin-bottom:14px;}
  .cat-hero__lead{font-size:15.5px;}
  .cat-hero__stats{grid-template-columns:1fr 1fr;gap:10px;}
  .stat{padding:14px 16px;}
  .stat b{font-size:22px;}
  .cat-banner{aspect-ratio:16/10;}
  .cat-banner__cap{left:18px;right:18px;bottom:16px;}
  .section__head{margin-bottom:26px;}
  .hud{padding:32px 20px;}
  .hud-steps{grid-template-columns:1fr;gap:12px;}
  .hud-metrics{grid-template-columns:1fr;gap:14px;}
  .panel{padding:20px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:36px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .cta-band{padding:64px 0;}
  .big-card__body{padding:18px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
  .big-card:hover{transform:none;}
  .big-card:hover .big-card__cover img{transform:none;}
}