/* roulang page: index */
:root{
  --ink:#0E1116;
  --ink-soft:#1C2027;
  --accent:#FF4A1C;
  --accent-deep:#D93A10;
  --field:#1B6E5A;
  --field-soft:#E4EFEA;
  --base:#F6F4EF;
  --surface:#FFFFFF;
  --line:#E6E1D8;
  --muted:#6E6A63;
  --invert:#FBFAF7;
  --radius-pill:999px;
  --radius-card:20px;
  --radius-mid:16px;
  --radius-img:14px;
  --radius-badge:6px;
  --shadow-sm:0 1px 2px rgba(14,17,22,.05);
  --shadow-md:0 8px 24px -12px rgba(14,17,22,.18);
  --shadow-lg:0 24px 60px -24px rgba(14,17,22,.28);
  --ease:cubic-bezier(.22,.61,.36,1);
  --sec-gap:64px;
}
@media(min-width:768px){:root{--sec-gap:88px}}
@media(min-width:1280px){:root{--sec-gap:120px}}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--base);
  color:var(--ink-soft);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16.5px;
  line-height:1.85;
  padding-top:104px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
::selection{background:rgba(255,74,28,.18)}

.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
@media(min-width:768px){.container{padding-left:32px;padding-right:32px}}
@media(min-width:1280px){.container{padding-left:48px;padding-right:48px}}

.section{padding-top:var(--sec-gap)}
.section-head{max-width:760px;margin-bottom:36px}
.section-head h2{
  font-size:28px;
  font-weight:700;
  letter-spacing:-.02em;
  line-height:1.22;
  color:var(--ink);
}
@media(min-width:1024px){.section-head h2{font-size:36px}}
.section-head p{margin-top:14px;color:var(--muted);font-size:16px;max-width:640px}
.section-head--row{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  max-width:none;
  flex-wrap:wrap;
}
.mark-line{display:block;width:64px;height:3px;background:var(--accent);border-radius:2px}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;
  top:16px;
  left:0;
  right:0;
  z-index:80;
  padding:0 16px;
}
.nav-shell{
  max-width:1180px;
  margin:0 auto;
  height:64px;
  display:flex;
  align-items:center;
  gap:18px;
  padding:0 10px 0 18px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:rgba(246,244,239,.86);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:box-shadow .2s var(--ease),background .2s var(--ease);
}
.site-header.is-scrolled .nav-shell{
  box-shadow:var(--shadow-md);
  background:rgba(246,244,239,.95);
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;min-height:44px}
.brand-dot{
  width:10px;height:10px;border-radius:3px;
  background:var(--accent);
  flex-shrink:0;
}
.brand-text{
  font-size:16px;
  font-weight:800;
  letter-spacing:-.02em;
  color:var(--ink);
  white-space:nowrap;
}
@media(max-width:520px){.brand-text{font-size:14px}}
.nav-menu{
  display:flex;
  align-items:center;
  gap:2px;
  margin-left:auto;
}
.nav-menu a{
  display:inline-flex;
  align-items:center;
  height:40px;
  padding:0 14px;
  border-radius:var(--radius-pill);
  font-size:14.5px;
  font-weight:600;
  color:var(--muted);
  position:relative;
  transition:color .2s var(--ease),background .2s var(--ease);
  white-space:nowrap;
}
.nav-menu a::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:6px;
  height:2px;
  background:var(--accent);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .18s var(--ease);
  border-radius:2px;
}
.nav-menu a:hover{color:var(--ink)}
.nav-menu a:hover::after{transform:scaleX(1)}
.nav-menu a.is-active{
  background:var(--ink);
  color:var(--invert);
}
.nav-menu a.is-active::after{display:none}
.nav-cta{
  flex-shrink:0;
  height:44px;
  padding:0 22px;
  display:inline-flex;
  align-items:center;
  border-radius:var(--radius-pill);
  background:var(--ink);
  color:var(--invert);
  font-size:14.5px;
  font-weight:600;
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.nav-cta:hover{background:var(--accent);transform:translateY(-2px)}
.nav-cta:active{transform:translateY(0)}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line);
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:5px;
  margin-left:auto;
  flex-shrink:0;
}
.nav-toggle span{
  display:block;
  width:18px;height:2px;
  background:var(--ink);
  border-radius:2px;
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

@media(max-width:1023px){
  .nav-toggle{display:flex}
  .nav-cta{display:none}
  .nav-menu{
    position:fixed;
    left:16px;right:16px;
    top:92px;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    box-shadow:var(--shadow-lg);
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:12px;
    margin-left:0;
    display:none;
    max-height:calc(100vh - 140px);
    overflow-y:auto;
  }
  .nav-menu.is-open{display:flex}
  .nav-menu a{
    height:56px;
    padding:0 20px;
    font-size:17px;
    font-weight:700;
    color:var(--ink);
    border-radius:var(--radius-mid);
  }
  .nav-menu a::after{display:none}
  .nav-menu a.is-active{background:var(--ink);color:var(--invert)}
  .nav-menu a:hover{background:var(--field-soft)}
  .nav-menu .nav-menu-cta{
    margin-top:10px;
    height:52px;
    justify-content:center;
    background:var(--ink);
    color:var(--invert);
    display:flex;
  }
  .nav-menu .nav-menu-cta:hover{background:var(--accent);color:var(--invert)}
}

/* ---------- 按钮 ---------- */
.btn-primary{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  border-radius:var(--radius-pill);
  background:var(--ink);
  color:var(--invert);
  font-size:15.5px;
  font-weight:600;
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.btn-primary:hover{background:var(--accent);transform:translateY(-2px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  border-radius:var(--radius-pill);
  border:1.5px solid var(--ink);
  color:var(--ink);
  font-size:15.5px;
  font-weight:600;
  background:transparent;
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.btn-ghost:hover{background:rgba(14,17,22,.08);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
@media(max-width:640px){
  .btn-primary,.btn-ghost{height:44px;padding:0 20px;font-size:15px}
}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14.5px;
  font-weight:600;
  color:var(--ink);
  position:relative;
}
.text-link .arrow{transition:transform .2s var(--ease);display:inline-block}
.text-link::after{
  content:"";
  position:absolute;
  left:0;right:22px;bottom:-2px;
  height:1.5px;
  background:var(--accent);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .18s var(--ease);
}
.text-link:hover::after{transform:scaleX(1)}
.text-link:hover .arrow{transform:translateX(4px)}

/* ---------- 徽章 ---------- */
.badge-cat{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 10px;
  border-radius:var(--radius-badge);
  background:var(--field-soft);
  color:var(--field);
  font-size:12px;
  font-weight:600;
  white-space:nowrap;
}
.badge-tag{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 10px;
  border-radius:var(--radius-badge);
  background:rgba(14,17,22,.78);
  color:var(--invert);
  font-size:12px;
  font-weight:600;
  backdrop-filter:blur(6px);
}
.meta{
  font-size:13px;
  color:var(--muted);
  font-weight:500;
  font-variant-numeric:tabular-nums;
}

/* ---------- Hero ---------- */
.hero{padding-top:28px}
@media(min-width:1024px){.hero{padding-top:44px}}
.hero-grid{display:grid;gap:40px;grid-template-columns:1fr}
@media(min-width:1024px){
  .hero-grid{grid-template-columns:7fr 5fr;gap:56px;align-items:center;min-height:580px}
}
.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  height:28px;
  padding:0 12px;
  border-radius:var(--radius-pill);
  background:var(--field-soft);
  color:var(--field);
  font-size:13px;
  font-weight:600;
  margin:20px 0 18px;
}
.hero h1{
  font-size:32px;
  font-weight:900;
  letter-spacing:-.03em;
  line-height:1.14;
  color:var(--ink);
}
@media(min-width:768px){.hero h1{font-size:48px}}
@media(min-width:1280px){.hero h1{font-size:64px}}
.hero-sub{
  margin-top:20px;
  font-size:16.5px;
  color:var(--muted);
  max-width:520px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-stats{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:0;
  margin-top:44px;
  border-top:1px solid var(--line);
  padding-top:26px;
}
.hero-stats li{
  padding:0 16px;
  border-left:1px solid var(--line);
}
.hero-stats li:first-child{padding-left:0;border-left:0}
.hero-stats .num{
  display:block;
  font-size:24px;
  font-weight:800;
  color:var(--ink);
  letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;
  line-height:1.2;
}
@media(min-width:768px){.hero-stats .num{font-size:30px}}
.hero-stats .lbl{display:block;font-size:12.5px;color:var(--muted);margin-top:6px;line-height:1.5}

.hero-visual{position:relative}
.hero-visual img{
  width:100%;
  aspect-ratio:16/12;
  object-fit:cover;
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-lg);
}
.hero-float{
  position:absolute;
  left:-8px;
  bottom:-18px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-mid);
  box-shadow:var(--shadow-md);
  padding:16px 20px;
  max-width:250px;
}
@media(min-width:1024px){.hero-float{left:-32px;bottom:-24px}}
.hero-float strong{
  display:block;
  font-size:22px;
  font-weight:800;
  color:var(--ink);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
}
.hero-float span{display:block;font-size:13px;color:var(--muted);margin-top:4px;line-height:1.6}

/* ---------- 主题封面卡 ---------- */
.cover-grid{display:grid;gap:24px;grid-template-columns:1fr}
@media(min-width:1024px){
  .cover-grid{grid-template-columns:1.3fr 1fr;grid-template-rows:auto auto}
  .cover-card--wide{grid-row:span 2}
}
.cover-card{
  display:flex;
  flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  transition:transform .32s var(--ease),border-color .32s var(--ease),box-shadow .32s var(--ease);
}
.cover-card:hover{
  transform:translateY(-4px);
  border-color:rgba(255,74,28,.38);
  box-shadow:var(--shadow-md);
}
.cover-media{position:relative;overflow:hidden}
.cover-media img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  transition:transform .32s var(--ease);
}
.cover-card--wide .cover-media img{aspect-ratio:16/11}
.cover-card:hover .cover-media img{transform:scale(1.04)}
.cover-media .badge-tag{position:absolute;left:14px;top:14px}
.cover-body{padding:22px 24px 26px;display:flex;flex-direction:column;gap:12px;flex:1}
.cover-body h3{
  font-size:19px;
  font-weight:700;
  color:var(--ink);
  line-height:1.45;
  letter-spacing:-.01em;
}
.cover-card--wide .cover-body h3{font-size:24px}
.cover-body p{font-size:15px;color:var(--muted);line-height:1.8}
.cover-body .text-link{margin-top:auto;padding-top:8px}

/* ---------- 合集目录 ---------- */
.catalog-group + .catalog-group{margin-top:0}
.catalog-group-head{
  display:flex;
  align-items:baseline;
  gap:12px;
  padding:18px 0 12px;
  border-bottom:1px solid var(--line);
}
.catalog-group-head span{font-size:13px;color:var(--muted);font-weight:600}
.catalog-grid{display:grid;gap:0;grid-template-columns:1fr}
@media(min-width:1024px){.catalog-grid{grid-template-columns:repeat(3,1fr);column-gap:32px}}
.card-index{
  display:flex;
  align-items:flex-start;
  gap:18px;
  padding:22px 4px;
  border-bottom:1px solid var(--line);
  transition:background .2s var(--ease);
}
.card-index:hover{background:rgba(255,255,255,.6)}
.card-index .idx{
  font-size:26px;
  font-weight:800;
  color:transparent;
  -webkit-text-stroke:1px var(--line);
  font-variant-numeric:tabular-nums;
  line-height:1.1;
  flex-shrink:0;
  width:44px;
  transition:color .2s var(--ease),-webkit-text-stroke-color .2s var(--ease);
}
.card-index:hover .idx{color:var(--accent);-webkit-text-stroke-color:var(--accent)}
.card-index .idx-body{flex:1;min-width:0}
.card-index h3{
  font-size:17px;
  font-weight:700;
  color:var(--ink);
  line-height:1.5;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.card-index p{
  margin-top:6px;
  font-size:14px;
  color:var(--muted);
  line-height:1.7;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.card-index .arrow{
  color:var(--muted);
  flex-shrink:0;
  transition:transform .2s var(--ease),color .2s var(--ease);
  font-size:16px;
  line-height:1.6;
}
.card-index:hover .arrow{transform:translateX(4px);color:var(--accent)}

/* ---------- 精选条目 ---------- */
.entry-grid{display:grid;gap:24px;grid-template-columns:1fr}
@media(min-width:640px){.entry-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1280px){.entry-grid{grid-template-columns:repeat(3,1fr)}}
.entry-card{
  display:flex;
  gap:16px;
  padding:18px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-mid);
  transition:transform .32s var(--ease),border-color .32s var(--ease),box-shadow .32s var(--ease);
}
.entry-card:hover{
  transform:translateY(-4px);
  border-color:rgba(255,74,28,.38);
  box-shadow:var(--shadow-md);
}
.entry-card img{
  width:96px;
  height:96px;
  aspect-ratio:1/1;
  object-fit:cover;
  border-radius:var(--radius-img);
  flex-shrink:0;
}
.entry-body{min-width:0;display:flex;flex-direction:column}
.entry-body h3{
  font-size:17px;
  font-weight:700;
  color:var(--ink);
  line-height:1.5;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.entry-body p{
  margin-top:8px;
  font-size:14px;
  color:var(--muted);
  line-height:1.7;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.entry-meta{
  margin-top:auto;
  padding-top:12px;
  display:flex;
  align-items:center;
  gap:10px;
}
.entry-meta .arrow{color:var(--muted);transition:transform .2s var(--ease)}
.entry-card:hover .entry-meta .arrow{transform:translateX(4px);color:var(--accent)}
@media(max-width:520px){
  .entry-card{flex-direction:column}
  .entry-card img{width:100%;height:auto;aspect-ratio:16/10}
}

/* ---------- 最新信息列表 ---------- */
.post-list{border-top:1px solid var(--line)}
.post-item{
  display:flex;
  gap:20px;
  padding:24px 4px;
  border-bottom:1px solid var(--line);
  transition:background .2s var(--ease);
}
.post-item:hover{background:rgba(255,255,255,.6)}
.post-no{
  flex-shrink:0;
  width:52px;
  height:52px;
  border-radius:var(--radius-img);
  background:var(--field-soft);
  color:var(--field);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:15px;
  font-weight:800;
  font-variant-numeric:tabular-nums;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.post-item:hover .post-no{background:var(--ink);color:var(--invert)}
.post-main{min-width:0;flex:1}
.post-main h3{
  font-size:17.5px;
  font-weight:700;
  color:var(--ink);
  line-height:1.5;
  transition:color .2s var(--ease);
}
.post-item:hover .post-main h3{color:var(--accent-deep)}
.post-main p{
  margin-top:8px;
  font-size:14.5px;
  color:var(--muted);
  line-height:1.75;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.post-meta{display:flex;align-items:center;gap:10px;margin-top:12px;flex-wrap:wrap}
.empty-state{
  min-height:240px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:10px;
  text-align:center;
  border:1px dashed var(--line);
  border-radius:var(--radius-card);
  padding:40px 24px;
  background:rgba(255,255,255,.5);
}
.empty-state svg{width:40px;height:40px;stroke:var(--muted);fill:none;stroke-width:1.5}
.empty-state h3{font-size:17px;font-weight:700;color:var(--ink)}
.empty-state p{font-size:14px;color:var(--muted)}
.empty-state a{
  margin-top:8px;
  height:42px;
  padding:0 22px;
  display:inline-flex;
  align-items:center;
  border-radius:var(--radius-pill);
  border:1.5px solid var(--ink);
  color:var(--ink);
  font-size:14.5px;
  font-weight:600;
  transition:background .2s var(--ease);
}
.empty-state a:hover{background:rgba(14,17,22,.08)}

/* ---------- 横向滚动卡带 ---------- */
.rail-wrap{position:relative}
.rail{
  display:flex;
  gap:20px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  padding-bottom:14px;
  margin:0 -20px;
  padding-left:20px;
  padding-right:20px;
  scrollbar-width:thin;
}
@media(min-width:768px){
  .rail{margin:0 -32px;padding-left:32px;padding-right:32px}
}
@media(min-width:1280px){
  .rail{margin:0 -48px;padding-left:48px;padding-right:48px}
}
.rail::-webkit-scrollbar{height:6px}
.rail::-webkit-scrollbar-track{background:var(--line);border-radius:99px}
.rail::-webkit-scrollbar-thumb{background:var(--muted);border-radius:99px}
.rail-card{
  flex:0 0 82%;
  scroll-snap-align:start;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  display:flex;
  flex-direction:column;
  transition:transform .32s var(--ease),border-color .32s var(--ease),box-shadow .32s var(--ease);
}
@media(min-width:768px){.rail-card{flex:0 0 46%}}
@media(min-width:1024px){.rail-card{flex:0 0 30%}}
@media(min-width:1280px){.rail-card{flex:0 0 24.5%}}
.rail-card:hover{transform:translateY(-4px);border-color:rgba(255,74,28,.38);box-shadow:var(--shadow-md)}
.rail-card img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .32s var(--ease)}
.rail-card:hover img{transform:scale(1.04)}
.rail-card .rail-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.rail-card h3{font-size:17px;font-weight:700;color:var(--ink);line-height:1.5}
.rail-card p{font-size:14px;color:var(--muted);line-height:1.75}
.rail-hint{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--muted);
  margin-top:6px;
}
.rail-hint::before{
  content:"";
  width:26px;height:1.5px;background:var(--accent);border-radius:2px;
}

/* ---------- 榜单/证据条 ---------- */
.evidence{
  background:var(--ink);
  color:var(--invert);
  border-radius:24px;
  padding:40px 28px;
  margin-top:var(--sec-gap);
  outline:1px solid rgba(251,250,247,.12);
  outline-offset:-1px;
}
@media(min-width:768px){.evidence{padding:56px 48px}}
.evidence h2{font-size:26px;font-weight:700;letter-spacing:-.02em;line-height:1.25;color:var(--invert)}
@media(min-width:1024px){.evidence h2{font-size:34px}}
.evidence .lead{margin-top:14px;font-size:15.5px;color:rgba(251,250,247,.66);max-width:620px}
.evidence-grid{
  display:grid;
  gap:24px;
  grid-template-columns:repeat(2,1fr);
  margin-top:36px;
}
@media(min-width:1024px){.evidence-grid{grid-template-columns:repeat(4,1fr)}}
.evidence-grid li{
  border-top:1px solid rgba(251,250,247,.16);
  padding-top:18px;
}
.evidence-grid .num{
  display:block;
  font-size:30px;
  font-weight:800;
  color:var(--invert);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
  line-height:1.15;
}
.evidence-grid .lbl{display:block;margin-top:8px;font-size:13.5px;color:rgba(251,250,247,.62);line-height:1.6}

/* ---------- FAQ ---------- */
.faq{max-width:880px;margin:0 auto}
.faq-item{border-top:1px solid var(--line)}
.faq-item:last-child{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  text-align:left;
  padding:22px 4px;
  min-height:44px;
  font-size:18px;
  font-weight:600;
  color:var(--ink);
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--accent-deep)}
.faq-icon{
  position:relative;
  width:18px;height:18px;
  flex-shrink:0;
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  background:var(--ink);
  border-radius:2px;
  transition:transform .26s var(--ease),background .2s var(--ease);
}
.faq-icon::before{left:0;top:8px;width:18px;height:2px}
.faq-icon::after{left:8px;top:0;width:2px;height:18px}
.faq-item.is-open .faq-icon::after{transform:scaleY(0)}
.faq-item.is-open .faq-icon::before{background:var(--accent)}
.faq-a{
  display:grid;
  grid-template-rows:0fr;
  transition:grid-template-rows .26s var(--ease);
}
.faq-a-inner{overflow:hidden}
.faq-a p{
  padding:0 4px 24px;
  font-size:15px;
  color:var(--muted);
  line-height:1.8;
  max-width:760px;
}
.faq-item.is-open .faq-a{grid-template-rows:1fr}

/* ---------- CTA 收尾 ---------- */
.cta-block{
  background:var(--ink);
  color:var(--invert);
  border-radius:24px;
  padding:40px 28px;
  outline:1px solid rgba(251,250,247,.14);
  outline-offset:-1px;
  display:flex;
  flex-direction:column;
  gap:28px;
}
@media(min-width:1024px){
  .cta-block{flex-direction:row;align-items:center;justify-content:space-between;padding:56px;gap:40px}
}
.cta-block h2{font-size:26px;font-weight:700;letter-spacing:-.02em;line-height:1.25;color:var(--invert)}
@media(min-width:1024px){.cta-block h2{font-size:32px}}
.cta-block p{margin-top:12px;font-size:15px;color:rgba(251,250,247,.64);max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
@media(max-width:1023px){.cta-actions{flex-direction:column;width:100%}}
.pill-outline{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(251,250,247,.42);
  color:var(--invert);
  font-size:14.5px;
  font-weight:600;
  transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
  white-space:nowrap;
}
.pill-outline:hover{background:var(--invert);color:var(--ink);transform:translateY(-2px)}
.pill-outline:active{transform:translateY(0)}
.pill-outline.is-done{background:var(--accent);border-color:var(--accent);color:var(--invert)}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:var(--sec-gap);
  background:var(--ink);
  color:var(--invert);
  border-top:1px solid rgba(251,250,247,.14);
  padding:56px 0 28px;
}
.footer-grid{
  display:grid;
  gap:36px;
  grid-template-columns:1fr;
}
@media(min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-dot{background:var(--accent)}
.footer-brand span{font-size:17px;font-weight:800;letter-spacing:-.02em;color:var(--invert)}
.footer-col h3{
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  color:rgba(251,250,247,.5);
  margin-bottom:16px;
}
.footer-col p{font-size:14px;color:rgba(251,250,247,.66);line-height:1.8;max-width:320px}
.footer-col li{margin-bottom:10px}
.footer-col a{
  font-size:14.5px;
  color:rgba(251,250,247,.78);
  position:relative;
  display:inline-block;
  transition:color .2s var(--ease);
}
.footer-col a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-2px;
  height:1.5px;
  background:var(--accent);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .18s var(--ease);
}
.footer-col a:hover{color:var(--accent)}
.footer-col a:hover::after{transform:scaleX(1)}
.footer-bottom{
  margin-top:44px;
  padding-top:22px;
  border-top:1px solid rgba(251,250,247,.14);
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:space-between;
  font-size:13px;
  color:rgba(251,250,247,.6);
}

/* ---------- 进场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.is-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}
}

/* roulang page: article */
:root{
  --ink:#0E1116;
  --ink-soft:#1C2027;
  --accent:#FF4A1C;
  --accent-deep:#D93A10;
  --field:#1B6E5A;
  --field-soft:#E4EFEA;
  --base:#F6F4EF;
  --surface:#FFFFFF;
  --line:#E6E1D8;
  --muted:#6E6A63;
  --invert:#FBFAF7;
  --r-pill:999px;
  --r-card:20px;
  --r-md:16px;
  --r-input:12px;
  --r-img:14px;
  --sh-sm:0 1px 2px rgba(14,17,22,.05);
  --sh-md:0 8px 24px -12px rgba(14,17,22,.18);
  --sh-lg:0 24px 60px -24px rgba(14,17,22,.28);
  --ease:cubic-bezier(.22,.61,.36,1);
  --prose:720px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body.site-body{
  margin:0;
  background:var(--base);
  color:var(--ink-soft);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.7;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body.nav-open{overflow:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.container{padding:0 32px}}
@media(min-width:1280px){.container{padding:0 48px}}

/* ---------- 悬浮胶囊导航 ---------- */
.site-header{
  position:fixed;
  top:16px;
  left:0;
  right:0;
  z-index:90;
  padding:0 16px;
  pointer-events:none;
}
.nav-shell{
  pointer-events:auto;
  max-width:1180px;
  margin:0 auto;
  height:64px;
  display:flex;
  align-items:center;
  gap:14px;
  padding:0 10px 0 20px;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  background:rgba(246,244,239,.86);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  transition:background .2s var(--ease),box-shadow .2s var(--ease);
}
.site-header.is-scrolled .nav-shell{
  background:rgba(246,244,239,.78);
  box-shadow:var(--sh-md);
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--ink);
  font-size:16px;
  font-weight:800;
  letter-spacing:-.02em;
  white-space:nowrap;
}
.brand-dot{
  width:10px;
  height:10px;
  border-radius:3px;
  background:var(--accent);
  flex:none;
}
.brand-text{display:inline-block}
.nav-menu{
  display:flex;
  align-items:center;
  gap:2px;
  list-style:none;
  margin:0 0 0 auto;
  padding:0;
}
.nav-menu > li{display:block}
.nav-menu a{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:40px;
  padding:0 14px;
  border-radius:var(--r-pill);
  font-size:15px;
  font-weight:600;
  color:var(--muted);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-menu a::after{
  content:"";
  position:absolute;
  left:14px;
  right:14px;
  bottom:8px;
  height:1px;
  background:currentColor;
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .18s var(--ease);
}
.nav-menu a:hover{color:var(--ink)}
.nav-menu a:hover::after{transform:scaleX(1)}
.nav-menu a.is-active{background:var(--ink);color:var(--invert)}
.nav-menu a.is-active::after{display:none}
.nav-menu-cta{display:none}
.nav-cta{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:44px;
  padding:0 22px;
  border-radius:var(--r-pill);
  background:var(--ink);
  color:var(--invert);
  font-size:15px;
  font-weight:600;
  flex:none;
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.nav-cta:hover{background:var(--accent);transform:translateY(-2px)}
.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  background:var(--surface);
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
  flex:none;
}
.nav-toggle span{
  display:block;
  width:16px;
  height:2px;
  border-radius:2px;
  background:var(--ink);
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

@media(max-width:1023px){
  .site-header{padding:0 12px}
  .nav-shell{height:56px;padding:0 8px 0 16px;justify-content:space-between}
  .nav-toggle{display:inline-flex}
  .nav-cta{display:none}
  .nav-menu{
    position:fixed;
    top:84px;
    left:12px;
    right:12px;
    max-height:calc(100vh - 120px);
    overflow-y:auto;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:2px;
    margin:0;
    padding:14px;
    border:1px solid var(--line);
    border-radius:var(--r-card);
    background:var(--surface);
    box-shadow:var(--sh-lg);
  }
  .nav-menu.is-open{display:flex}
  .nav-menu a{
    height:52px;
    padding:0 16px;
    border-radius:var(--r-input);
    font-size:16px;
    font-weight:700;
    color:var(--ink);
  }
  .nav-menu a::after{display:none}
  .nav-menu a.is-active{background:var(--ink);color:var(--invert)}
  .nav-menu-cta{display:block;margin-top:10px;padding-top:12px;border-top:1px solid var(--line)}
  .nav-menu-cta a{justify-content:center;background:var(--ink);color:var(--invert)}
}

/* ---------- 页面骨架 ---------- */
.page-top{padding-top:104px}
@media(min-width:1024px){.page-top{padding-top:132px}}
.section{padding:64px 0}
@media(min-width:768px){.section{padding:88px 0}}
@media(min-width:1280px){.section{padding:112px 0}}
.section-head{margin-bottom:28px}
.section-head h2{
  margin:0;
  color:var(--ink);
  font-size:28px;
  font-weight:700;
  letter-spacing:-.02em;
  line-height:1.25;
}
@media(min-width:1024px){.section-head h2{font-size:34px}}
.section-head p{margin:12px 0 0;color:var(--muted);font-size:16px}
.accent-bar{display:block;width:64px;height:3px;border-radius:2px;background:var(--accent);margin-bottom:20px}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding:20px 0 24px;
  font-size:14px;
  color:var(--muted);
}
.breadcrumb a{color:var(--muted);transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--accent-deep)}
.breadcrumb .sep{color:var(--line)}
.breadcrumb .current{color:var(--ink);font-weight:600;max-width:16em;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 文章头部 ---------- */
.article-head{max-width:820px;margin:0 auto}
.badge-cat{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 10px;
  border-radius:6px;
  background:var(--field-soft);
  color:var(--field);
  font-size:12px;
  font-weight:600;
  letter-spacing:.02em;
}
.article-title{
  margin:18px 0 16px;
  color:var(--ink);
  font-size:clamp(30px,4.4vw,50px);
  font-weight:800;
  letter-spacing:-.03em;
  line-height:1.14;
}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-size:14px;
  color:var(--muted);
  font-weight:500;
}
.article-meta .dot{color:var(--line)}
.head-divider{height:1px;background:var(--line);margin:28px 0 0}

/* ---------- 正文 + 目录 ---------- */
.article-wrap{
  max-width:1120px;
  margin:0 auto;
  padding-top:48px;
}
@media(min-width:1280px){
  .article-wrap{
    display:grid;
    grid-template-columns:minmax(0,720px) 200px;
    gap:56px;
    justify-content:center;
    align-items:start;
  }
}
.article-body{max-width:var(--prose);margin:0 auto;min-height:240px}
@media(min-width:1280px){.article-body{margin:0}}

.prose-cn{color:var(--ink-soft)}
.prose-cn p{margin:0 0 1.6em;font-size:17px;line-height:1.9}
.prose-cn h2{
  position:relative;
  margin:48px 0 16px;
  padding-left:20px;
  color:var(--ink);
  font-size:24px;
  font-weight:700;
  letter-spacing:-.02em;
  line-height:1.34;
}
.prose-cn h2::before{
  content:"";
  position:absolute;
  left:0;
  top:.42em;
  width:3px;
  height:20px;
  border-radius:2px;
  background:var(--accent);
}
.prose-cn h3{
  margin:34px 0 12px;
  color:var(--ink);
  font-size:20px;
  font-weight:700;
  line-height:1.45;
}
.prose-cn ul,.prose-cn ol{margin:0 0 1.6em;padding-left:1.35em}
.prose-cn li{margin-bottom:.6em;font-size:17px;line-height:1.85}
.prose-cn ul li::marker{color:var(--accent)}
.prose-cn ol li::marker{color:var(--accent-deep);font-weight:700}
.prose-cn blockquote{
  margin:28px 0;
  padding:20px 24px;
  border-left:3px solid var(--accent);
  border-radius:0 var(--r-img) var(--r-img) 0;
  background:var(--surface);
  color:var(--ink-soft);
}
.prose-cn blockquote p:last-child{margin-bottom:0}
.prose-cn img{border-radius:var(--r-img);margin:24px 0 10px;width:100%;height:auto}
.prose-cn figcaption{
  margin:0 0 24px;
  text-align:center;
  font-size:13px;
  color:var(--muted);
}
.prose-cn a{
  color:var(--accent-deep);
  border-bottom:1px solid rgba(217,58,16,.35);
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.prose-cn a:hover{border-color:var(--accent-deep)}
.prose-cn table{
  width:100%;
  margin:24px 0;
  border-collapse:collapse;
  font-size:15px;
}
.prose-cn th,.prose-cn td{
  padding:12px 14px;
  border:1px solid var(--line);
  text-align:left;
}
.prose-cn thead th{background:var(--ink);color:var(--invert);font-weight:600}
.prose-cn tbody tr:nth-child(even){background:var(--base)}
.table-wrap{overflow-x:auto;margin:24px 0}
.table-wrap table{margin:0}
@media(max-width:767px){
  .table-wrap{
    position:relative;
    -webkit-mask-image:linear-gradient(90deg,#000 88%,transparent 100%);
    mask-image:linear-gradient(90deg,#000 88%,transparent 100%);
  }
}

/* 目录 */
.toc-aside{display:none}
@media(min-width:1280px){
  .toc-aside{
    display:block;
    position:sticky;
    top:120px;
    padding-left:20px;
    border-left:1px solid var(--line);
  }
}
.toc-aside.is-empty{display:none}
.toc-title{
  margin:0 0 12px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--muted);
}
.toc-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.toc-list a{
  display:block;
  font-size:14px;
  line-height:1.6;
  color:var(--muted);
  transition:color .2s var(--ease);
}
.toc-list a:hover{color:var(--ink)}
.toc-list a.is-current{color:var(--accent-deep);font-weight:600}
.toc-mobile{display:block;margin-bottom:28px}
@media(min-width:1280px){.toc-mobile{display:none}}
.toc-mobile.is-empty{display:none}
.toc-mobile summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:48px;
  padding:0 16px;
  border:1px solid var(--line);
  border-radius:var(--r-input);
  background:var(--surface);
  color:var(--ink);
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  list-style:none;
}
.toc-mobile summary::-webkit-details-marker{display:none}
.toc-mobile summary::after{content:"＋";color:var(--muted)}
.toc-mobile[open] summary::after{content:"－"}
.toc-mobile .toc-list{padding:16px;border:1px solid var(--line);border-top:0;border-radius:0 0 var(--r-input) var(--r-input);background:var(--surface)}

/* 空态 */
.empty-state{
  min-height:240px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:14px;
  text-align:center;
  padding:40px 24px;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:var(--surface);
}
.empty-icon{
  width:44px;
  height:44px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--muted);
  font-size:20px;
}
.empty-state h2{margin:0;font-size:20px;font-weight:700;color:var(--ink)}
.empty-state p{margin:0;font-size:15px;color:var(--muted)}

/* ---------- 文末模块 ---------- */
.post-tags{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  padding-top:36px;
  margin-top:44px;
  border-top:1px solid var(--line);
}
.post-tags .label{font-size:14px;color:var(--muted);font-weight:600}
.tag{
  display:inline-flex;
  align-items:center;
  height:30px;
  padding:0 12px;
  border:1px solid var(--line);
  border-radius:6px;
  background:var(--surface);
  color:var(--ink-soft);
  font-size:13px;
  font-weight:600;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.tag:hover{border-color:rgba(255,74,28,.38);color:var(--accent-deep)}

.share-bar{
  margin-top:28px;
  padding:32px 36px;
  border-radius:24px;
  background:var(--ink);
  border:1px solid rgba(251,250,247,.16);
  color:var(--invert);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.share-bar h2{margin:0 0 8px;font-size:22px;font-weight:700;letter-spacing:-.02em;color:var(--invert)}
.share-bar p{margin:0;font-size:15px;color:rgba(251,250,247,.66)}
.share-actions{display:flex;flex-wrap:wrap;gap:12px}
.pill-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:0 22px;
  border-radius:var(--r-pill);
  border:1px solid rgba(251,250,247,.34);
  background:transparent;
  color:var(--invert);
  font-size:15px;
  font-weight:600;
  transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.pill-btn:hover{background:var(--invert);color:var(--ink);transform:translateY(-2px)}
.pill-btn:active{transform:translateY(0)}

.card-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:24px;
}
@media(min-width:640px){.card-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr)}}
.entry-card{
  display:flex;
  flex-direction:column;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:var(--surface);
  overflow:hidden;
  transition:transform .32s var(--ease),border-color .32s var(--ease),box-shadow .32s var(--ease);
}
.entry-card:hover{
  transform:translateY(-4px);
  border-color:rgba(255,74,28,.38);
  box-shadow:var(--sh-md);
}
.entry-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--base)}
.entry-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .32s var(--ease);
}
.entry-card:hover .entry-media img{transform:scale(1.04)}
.entry-tag{
  position:absolute;
  left:14px;
  top:14px;
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 10px;
  border-radius:6px;
  background:rgba(14,17,22,.82);
  color:var(--invert);
  font-size:12px;
  font-weight:600;
}
.entry-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.entry-body h3{
  margin:0;
  font-size:18px;
  font-weight:700;
  line-height:1.45;
  color:var(--ink);
}
.entry-body p{
  margin:0;
  font-size:15px;
  line-height:1.8;
  color:var(--muted);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.entry-more{
  margin-top:auto;
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--accent-deep);
}
.entry-more span{transition:transform .2s var(--ease)}
.entry-card:hover .entry-more span{transform:translateX(4px)}

.return-block{
  margin-top:48px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:16px;
}
.btn-primary{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:48px;
  padding:0 26px;
  border-radius:var(--r-pill);
  background:var(--ink);
  color:var(--invert);
  font-size:15px;
  font-weight:600;
  border:0;
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.btn-primary:hover{background:var(--accent);transform:translateY(-2px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:0 22px;
  border-radius:var(--r-pill);
  border:1.5px solid var(--ink);
  background:transparent;
  color:var(--ink);
  font-size:15px;
  font-weight:600;
  transition:background .2s var(--ease);
}
.btn-ghost:hover{background:rgba(14,17,22,.08)}
.prevnext{
  margin-top:28px;
  border-top:1px solid var(--line);
  list-style:none;
  padding:0;
}
.prevnext li{border-bottom:1px solid var(--line)}
.prevnext a{
  display:flex;
  align-items:center;
  gap:14px;
  min-height:56px;
  padding:16px 4px;
  font-size:15px;
  color:var(--ink-soft);
  transition:color .2s var(--ease);
}
.prevnext a:hover{color:var(--accent-deep)}
.prevnext .dir{
  flex:none;
  font-size:13px;
  font-weight:700;
  letter-spacing:.04em;
  color:var(--muted);
}

/* FAQ */
.faq-list{max-width:880px;margin:0 auto}
.faq-item{border-top:1px solid var(--line)}
.faq-item:last-child{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-height:64px;
  padding:18px 4px;
  border:0;
  background:transparent;
  text-align:left;
  color:var(--ink);
  font-size:18px;
  font-weight:600;
  line-height:1.5;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--accent-deep)}
.faq-sign{
  flex:none;
  width:24px;
  height:24px;
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--muted);
  font-size:20px;
  line-height:1;
  transition:transform .26s var(--ease),color .26s var(--ease);
}
.faq-item.is-open .faq-sign{transform:rotate(180deg);color:var(--accent)}
.faq-a{
  overflow:hidden;
  max-height:0;
  transition:max-height .26s var(--ease);
}
.faq-a p{
  margin:0;
  padding:0 4px 22px;
  font-size:15px;
  line-height:1.8;
  color:var(--muted);
}

/* 进场动效 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--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}
  html{scroll-behavior:auto}
}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:96px;
  padding:64px 0 28px;
  background:var(--ink);
  color:var(--invert);
  border-top:1px solid rgba(251,250,247,.18);
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:36px;
}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:48px}}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:14px;
  font-size:18px;
  font-weight:800;
  letter-spacing:-.02em;
  color:var(--invert);
}
.footer-col p{
  margin:0;
  font-size:15px;
  line-height:1.85;
  color:rgba(251,250,247,.66);
  max-width:34em;
}
.footer-col h3{
  margin:0 0 16px;
  font-size:15px;
  font-weight:700;
  letter-spacing:.02em;
  color:var(--invert);
}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.footer-col a{
  position:relative;
  display:inline-block;
  font-size:15px;
  color:rgba(251,250,247,.7);
  transition:color .2s var(--ease);
}
.footer-col a::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-2px;
  height:1px;
  background:currentColor;
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .18s var(--ease);
}
.footer-col a:hover{color:var(--accent)}
.footer-col a:hover::after{transform:scaleX(1)}
.footer-bottom{
  margin-top:44px;
  padding-top:20px;
  border-top:1px solid rgba(251,250,247,.16);
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  justify-content:space-between;
  font-size:13px;
  color:rgba(251,250,247,.6);
}

/* roulang page: category1 */
:root{
  --ink:#0E1116;
  --ink-soft:#1C2027;
  --accent:#FF4A1C;
  --accent-deep:#D93A10;
  --field:#1B6E5A;
  --field-soft:#E4EFEA;
  --base:#F6F4EF;
  --surface:#FFFFFF;
  --line:#E6E1D8;
  --muted:#6E6A63;
  --invert:#FBFAF7;
  --r-pill:999px;
  --r-lg:20px;
  --r-md:16px;
  --r-sm:12px;
  --sh-sm:0 1px 2px rgba(14,17,22,.05);
  --sh-md:0 8px 24px -12px rgba(14,17,22,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--base);
  color:var(--ink-soft);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16.5px;
  line-height:1.85;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px;}
@media (min-width:768px){.container{padding:0 32px;}}
@media (min-width:1280px){.container{padding:0 48px;}}

/* ============ 导航 ============ */
.site-header{
  position:fixed;top:16px;left:0;right:0;z-index:60;
  padding:0 20px;
}
.nav-shell{
  max-width:1180px;margin:0 auto;
  display:flex;align-items:center;gap:20px;
  height:64px;padding:0 10px 0 22px;
  border:1px solid var(--line);border-radius:var(--r-pill);
  background:rgba(246,244,239,.86);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:box-shadow 200ms var(--ease),background 200ms var(--ease);
}
.site-header.is-scrolled .nav-shell{
  box-shadow:var(--sh-md);
  background:rgba(246,244,239,.94);
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-dot{
  width:12px;height:12px;border-radius:3px;
  background:var(--accent);display:inline-block;flex:0 0 auto;
}
.brand-text{
  font-size:16px;font-weight:800;letter-spacing:-.02em;color:var(--ink);white-space:nowrap;
}
.nav-menu{
  display:flex;align-items:center;gap:2px;margin-left:auto;
}
.nav-menu > li > a{
  display:inline-block;position:relative;
  padding:9px 14px;border-radius:var(--r-pill);
  font-size:14.5px;font-weight:500;color:var(--ink-soft);
  transition:color 180ms var(--ease),background 180ms var(--ease);
  white-space:nowrap;
}
.nav-menu > li > a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:5px;height:1.5px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
  transition:transform 180ms var(--ease);
}
.nav-menu > li > a:hover{color:var(--ink);}
.nav-menu > li > a:hover::after{transform:scaleX(1);}
.nav-menu > li > a.is-active{background:var(--ink);color:var(--invert);}
.nav-menu > li > a.is-active::after{transform:scaleX(0);}
.nav-menu-cta{display:none;}
.nav-cta{
  flex:0 0 auto;
  display:inline-flex;align-items:center;justify-content:center;
  height:44px;padding:0 22px;border-radius:var(--r-pill);
  background:var(--ink);color:var(--invert);
  font-size:14.5px;font-weight:600;
  transition:background 200ms var(--ease),transform 200ms var(--ease);
}
.nav-cta:hover{background:var(--accent);transform:translateY(-2px);}
.nav-cta:active{transform:translateY(0);}
.nav-toggle{
  display:none;margin-left:auto;
  width:44px;height:44px;border-radius:var(--r-pill);
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
  border:1px solid var(--line);
}
.nav-toggle span{display:block;width:18px;height:1.6px;background:var(--ink);transition:transform 200ms var(--ease),opacity 200ms var(--ease);}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6.6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.6px) rotate(-45deg);}

@media (max-width:1023px){
  .nav-shell{height:56px;padding:0 8px 0 18px;gap:12px;}
  .brand-text{font-size:15px;}
  .nav-toggle{display:flex;}
  .nav-cta{display:none;}
  .nav-menu{
    position:absolute;top:72px;left:16px;right:16px;
    flex-direction:column;align-items:stretch;gap:2px;
    background:var(--surface);
    border:1px solid var(--line);border-radius:var(--r-lg);
    box-shadow:var(--sh-md);
    padding:10px;
    display:none;
  }
  .nav-menu.is-open{display:flex;}
  .nav-menu > li > a{display:block;padding:14px 16px;font-size:16px;font-weight:700;border-radius:var(--r-md);}
  .nav-menu > li > a::after{display:none;}
  .nav-menu > li > a.is-active{background:var(--ink);color:var(--invert);}
  .nav-menu-cta{
    display:flex;align-items:center;justify-content:center;
    margin-top:8px;height:48px;padding:0 18px;
    background:var(--ink);color:var(--invert) !important;
    border-radius:var(--r-pill);font-weight:600;
  }
  .nav-menu-cta:hover{background:var(--accent);}
  .nav-menu-cta::after{display:none;}
}

/* ============ 通用区块 ============ */
main{padding-top:128px;}
@media (max-width:1023px){main{padding-top:104px;}}
.section{padding:64px 0;}
@media (min-width:768px){.section{padding:88px 0;}}
@media (min-width:1280px){.section{padding:112px 0;}}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;font-weight:600;color:var(--muted);letter-spacing:.04em;
  margin-bottom:18px;
}
.eyebrow::before{content:"";width:64px;height:3px;background:var(--accent);display:block;}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:28px;}
@media (min-width:1024px){.sec-head{margin-bottom:36px;}}
.sec-title{
  font-size:28px;font-weight:700;letter-spacing:-.02em;line-height:1.22;color:var(--ink);
}
@media (min-width:1024px){.sec-title{font-size:36px;}}
.sec-sub{font-size:15px;color:var(--muted);margin-top:10px;max-width:640px;}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14.5px;font-weight:600;color:var(--ink);
  position:relative;white-space:nowrap;
}
.text-link::after{
  content:"";position:absolute;left:0;right:18px;bottom:-3px;height:1.5px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
  transition:transform 180ms var(--ease);
}
.text-link:hover::after{transform:scaleX(1);}
.text-link:hover .arrow{transform:translateX(4px);}
.arrow{display:inline-block;transition:transform 200ms var(--ease);}

/* ============ 面包屑 ============ */
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:14px;color:var(--muted);
  padding:20px 0 24px;
}
.crumb a:hover{color:var(--accent-deep);}
.crumb .sep{opacity:.6;}
.crumb .cur{color:var(--ink);font-weight:600;}

/* ============ 分类 Hero ============ */
.cat-hero{padding:8px 0 56px;}
@media (min-width:1024px){.cat-hero{padding:8px 0 72px;}}
.cat-hero-inner{max-width:860px;}
.cat-hero h1{
  font-size:36px;line-height:1.14;font-weight:900;letter-spacing:-.03em;color:var(--ink);
  margin-bottom:18px;
}
@media (min-width:768px){.cat-hero h1{font-size:52px;}}
@media (min-width:1280px){.cat-hero h1{font-size:64px;}}
.cat-lede{
  font-size:17px;font-weight:600;color:var(--ink);line-height:1.7;margin-bottom:22px;
}
.cat-hero p{color:var(--ink-soft);margin-bottom:1.4em;}
.cat-hero p:last-of-type{margin-bottom:28px;}
.anchor-row{display:flex;flex-wrap:wrap;gap:10px;padding-top:22px;border-top:1px solid var(--line);}
.anchor-pill{
  display:inline-flex;align-items:center;
  min-height:44px;padding:0 18px;
  border:1px solid var(--line);border-radius:var(--r-pill);
  background:var(--surface);
  font-size:14px;font-weight:600;color:var(--ink-soft);
  transition:border-color 200ms var(--ease),color 200ms var(--ease),transform 200ms var(--ease);
}
.anchor-pill:hover{border-color:rgba(255,74,28,.38);color:var(--accent-deep);transform:translateY(-2px);}

/* ============ 准备清单 ============ */
.prep-grid{
  display:grid;grid-template-columns:1fr;gap:0;
  border-top:1px solid var(--line);
}
.prep-item{
  padding:24px 0;border-bottom:1px solid var(--line);
  display:grid;grid-template-columns:auto 1fr;gap:18px;align-items:start;
}
.prep-num{
  font-size:15px;font-weight:800;color:var(--accent-deep);letter-spacing:.02em;
  padding-top:2px;min-width:34px;
}
.prep-item h3{font-size:18px;font-weight:650;color:var(--ink);line-height:1.45;margin-bottom:8px;}
.prep-item p{font-size:15.5px;color:var(--muted);line-height:1.8;}
@media (min-width:768px){
  .prep-grid{grid-template-columns:repeat(3,1fr);border-bottom:1px solid var(--line);}
  .prep-item{border-bottom:none;padding:28px 26px 28px 0;border-right:1px solid var(--line);}
  .prep-item:last-child{border-right:none;padding-right:0;}
  .prep-item:nth-child(2){padding-left:26px;}
  .prep-item:nth-child(3){padding-left:26px;}
}

/* ============ 步骤图文卡网格 ============ */
.cards-2{
  display:grid;grid-template-columns:1fr;gap:24px;
}
@media (min-width:768px){.cards-2{grid-template-columns:repeat(2,1fr);gap:28px;}}
.cover-card{
  background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;
  box-shadow:var(--sh-sm);
  transition:transform 320ms var(--ease),border-color 320ms var(--ease),box-shadow 320ms var(--ease);
  display:flex;flex-direction:column;
}
.cover-card:hover{
  transform:translateY(-4px);
  border-color:rgba(255,74,28,.38);
  box-shadow:var(--sh-md);
}
.cover-media{
  position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--base);
}
.cover-media img{width:100%;height:100%;object-fit:cover;transition:transform 320ms var(--ease);}
.cover-card:hover .cover-media img{transform:scale(1.04);}
.cover-tag{
  position:absolute;left:14px;top:14px;
  background:rgba(14,17,22,.82);color:var(--invert);
  font-size:12px;font-weight:600;letter-spacing:.02em;
  padding:4px 10px;border-radius:6px;backdrop-filter:blur(6px);
}
.cover-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.cover-body h3{font-size:19px;font-weight:650;line-height:1.45;color:var(--ink);}
.cover-body p{font-size:15px;color:var(--muted);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.cover-body .text-link{margin-top:auto;padding-top:6px;}

/* ============ 深色对照面板 ============ */
.dark-panel{
  background-color:var(--ink);
  background-image:linear-gradient(rgba(14,17,22,.94),rgba(14,17,22,.97)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  border-radius:24px;
  padding:40px 24px;
  color:var(--invert);
}
@media (min-width:768px){.dark-panel{padding:56px 44px;}}
.dark-panel .sec-title{color:var(--invert);}
.dark-panel .sec-sub{color:rgba(251,250,247,.66);}
.dark-grid{display:grid;grid-template-columns:1fr;gap:20px;margin-top:28px;}
@media (min-width:768px){.dark-grid{grid-template-columns:repeat(3,1fr);gap:24px;}}
.dark-card{
  border:1px solid rgba(251,250,247,.16);
  border-radius:var(--r-lg);
  padding:24px 22px;
  background:rgba(251,250,247,.03);
  transition:border-color 320ms var(--ease),background 320ms var(--ease);
}
.dark-card:hover{border-color:rgba(255,74,28,.55);background:rgba(251,250,247,.06);}
.dark-card h3{font-size:18px;font-weight:650;color:var(--invert);margin-bottom:10px;}
.dark-card p{font-size:15px;line-height:1.85;color:rgba(251,250,247,.68);}
.dark-card .stat{
  font-size:34px;font-weight:900;letter-spacing:-.03em;color:var(--accent);
  line-height:1.1;margin-bottom:12px;
}
.dark-panel .divider-line{border-top:1px solid rgba(251,250,247,.16);margin-top:32px;padding-top:22px;font-size:14px;color:rgba(251,250,247,.6);}

/* ============ 横向卡带 ============ */
.rail-wrap{position:relative;}
.rail{
  display:flex;gap:20px;overflow-x:auto;padding:4px 0 18px;
  scroll-snap-type:x mandatory;
  -webkit-overflow-scrolling:touch;
  scrollbar-width:thin;
}
.rail::-webkit-scrollbar{height:6px;}
.rail::-webkit-scrollbar-thumb{background:var(--line);border-radius:99px;}
.rail::-webkit-scrollbar-track{background:transparent;}
.rail-item{
  flex:0 0 82%;
  scroll-snap-align:start;
}
@media (min-width:640px){.rail-item{flex:0 0 46%;}}
@media (min-width:1024px){.rail-item{flex:0 0 calc((100% - 60px)/3.5);}}
@media (min-width:1280px){.rail-item{flex:0 0 calc((100% - 72px)/3.5);}}
.rail-card{
  display:flex;gap:16px;align-items:center;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);padding:16px;
  transition:border-color 320ms var(--ease),transform 320ms var(--ease),box-shadow 320ms var(--ease);
  height:100%;
}
.rail-card:hover{border-color:rgba(255,74,28,.38);transform:translateY(-4px);box-shadow:var(--sh-md);}
.rail-thumb{
  flex:0 0 88px;width:88px;height:88px;border-radius:14px;overflow:hidden;background:var(--base);
}
.rail-thumb img{width:100%;height:100%;object-fit:cover;}
.rail-text h3{font-size:16px;font-weight:650;color:var(--ink);line-height:1.45;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rail-text p{font-size:13.5px;color:var(--muted);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rail-hint{
  display:flex;align-items:center;justify-content:flex-end;gap:8px;
  font-size:13px;color:var(--muted);
}
.rail-hint .dash{width:28px;height:1px;background:var(--line);display:inline-block;}

/* ============ 徽章 ============ */
.badge-cat{
  display:inline-flex;align-items:center;
  background:var(--field-soft);color:var(--field);
  font-size:12px;font-weight:600;letter-spacing:.02em;
  padding:4px 10px;border-radius:6px;
}
.badge-ink{
  display:inline-flex;align-items:center;
  background:var(--ink);color:var(--invert);
  font-size:12px;font-weight:600;
  padding:4px 10px;border-radius:6px;
}

/* ============ FAQ ============ */
.faq-list{max-width:880px;margin:0 auto;border-top:1px solid var(--line);}
.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 0;text-align:left;
  font-size:18px;font-weight:600;color:var(--ink);line-height:1.5;
  min-height:44px;
}
.faq-icon{
  position:relative;flex:0 0 22px;width:22px;height:22px;
  border:1px solid var(--line);border-radius:50%;
  transition:border-color 200ms var(--ease),transform 260ms var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--ink);
  transform:translate(-50%,-50%);
  transition:opacity 200ms var(--ease),background 200ms var(--ease);
}
.faq-icon::before{width:9px;height:1.4px;}
.faq-icon::after{width:1.4px;height:9px;}
.faq-item.is-open .faq-icon{border-color:var(--accent);}
.faq-item.is-open .faq-icon::before{background:var(--accent);}
.faq-item.is-open .faq-icon::after{opacity:0;background:var(--accent);}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows 260ms var(--ease);}
.faq-item.is-open .faq-a{grid-template-rows:1fr;}
.faq-a-inner{overflow:hidden;}
.faq-a-inner p{
  font-size:15px;color:var(--muted);line-height:1.85;
  padding:0 0 22px;max-width:760px;
}

/* ============ CTA 收尾块 ============ */
.cta-block{
  background:var(--ink);
  border-radius:24px;
  padding:40px 24px;
  color:var(--invert);
  box-shadow:inset 0 0 0 1px rgba(251,250,247,.14);
}
@media (min-width:768px){.cta-block{padding:52px 48px;}}
.cta-inner{display:flex;flex-direction:column;gap:26px;}
@media (min-width:1024px){
  .cta-inner{flex-direction:row;align-items:center;justify-content:space-between;gap:40px;}
}
.cta-inner h2{font-size:26px;font-weight:800;letter-spacing:-.02em;color:var(--invert);line-height:1.3;}
@media (min-width:1024px){.cta-inner h2{font-size:32px;}}
.cta-inner p{font-size:15px;color:rgba(251,250,247,.68);margin-top:10px;max-width:520px;}
.cta-actions{display:flex;flex-direction:column;gap:12px;}
@media (min-width:640px){.cta-actions{flex-direction:row;flex-wrap:wrap;}}
@media (min-width:1024px){.cta-actions{flex:0 0 auto;flex-direction:row;}}
.btn-ghost-light{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-pill);
  border:1.5px solid rgba(251,250,247,.5);
  color:var(--invert);font-size:14.5px;font-weight:600;
  transition:background 200ms var(--ease),color 200ms var(--ease),border-color 200ms var(--ease),transform 200ms var(--ease);
  min-width:44px;
}
.btn-ghost-light:hover{background:var(--invert);color:var(--ink);border-color:var(--invert);transform:translateY(-2px);}
.btn-ghost-light:active{transform:translateY(0);}
@media (max-width:639px){.cta-actions .btn-ghost-light{width:100%;}}

/* ============ 通用按钮 ============ */
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-pill);
  background:var(--ink);color:var(--invert);
  font-size:15px;font-weight:600;
  transition:background 200ms var(--ease),transform 200ms var(--ease);
}
.btn-primary:hover{background:var(--accent);transform:translateY(-2px);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-pill);
  border:1.5px solid var(--ink);color:var(--ink);
  font-size:15px;font-weight:600;background:transparent;
  transition:background 200ms var(--ease),transform 200ms var(--ease);
}
.btn-ghost:hover{background:rgba(14,17,22,.08);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:64px;
  background:var(--ink);color:var(--invert);
  border-top:1px solid rgba(251,250,247,.14);
  padding:56px 0 28px;
}
@media (min-width:1024px){.site-footer{padding:72px 0 32px;}}
.footer-grid{
  display:grid;grid-template-columns:1fr;gap:36px;
}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;}}
.footer-brand{
  display:flex;align-items:center;gap:10px;
  font-size:16px;font-weight:800;letter-spacing:-.02em;color:var(--invert);
  margin-bottom:14px;
}
.footer-col p{font-size:14px;line-height:1.85;color:rgba(251,250,247,.62);max-width:340px;}
.footer-col h3{
  font-size:14px;font-weight:700;color:var(--invert);
  letter-spacing:.02em;margin-bottom:16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col ul a{
  font-size:14px;color:rgba(251,250,247,.66);
  position:relative;display:inline-block;
  transition:color 180ms var(--ease);
}
.footer-col ul a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:1px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
  transition:transform 180ms var(--ease);
}
.footer-col ul a:hover{color:var(--accent);}
.footer-col ul a:hover::after{transform:scaleX(1);}
.footer-bottom{
  margin-top:44px;padding-top:22px;
  border-top:1px solid rgba(251,250,247,.14);
  display:flex;flex-direction:column;gap:8px;
  font-size:13px;color:rgba(251,250,247,.6);
}
@media (min-width:768px){.footer-bottom{flex-direction:row;align-items:center;justify-content:space-between;}}

/* ============ 进场动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 480ms var(--ease),transform 480ms var(--ease);}
.reveal.is-visible{opacity:1;transform:translateY(0);}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition-duration:1ms !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category3 */
:root{
    --ink:#0E1116;
    --ink-soft:#1C2027;
    --accent:#FF4A1C;
    --accent-deep:#D93A10;
    --field:#1B6E5A;
    --field-soft:#E4EFEA;
    --base:#F6F4EF;
    --surface:#FFFFFF;
    --line:#E6E1D8;
    --muted:#6E6A63;
    --invert:#FBFAF7;
    --radius-pill:999px;
    --radius-card:20px;
    --radius-mid:16px;
    --radius-img:14px;
    --shadow-sm:0 1px 2px rgba(14,17,22,.05);
    --shadow-md:0 8px 24px -12px rgba(14,17,22,.18);
    --shadow-lg:0 24px 60px -24px rgba(14,17,22,.28);
    --ease:cubic-bezier(.22,.61,.36,1);
  }

  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--base);
    color:var(--ink-soft);
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
    font-size:16px;
    line-height:1.85;
    font-variant-numeric:tabular-nums;
    -webkit-font-smoothing:antialiased;
    padding-top:104px;
  }
  img{display:block;max-width:100%;height:auto}
  a{color:inherit;text-decoration:none}
  ul,ol{margin:0;padding:0;list-style:none}
  button{font:inherit;color:inherit}
  h1,h2,h3,h4,p{margin:0}
  :focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}

  .container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px}
  @media (min-width:768px){.container{padding:0 32px}}
  @media (min-width:1280px){.container{padding:0 48px}}

  /* ---------- 导航 ---------- */
  .site-header{position:fixed;top:16px;left:0;right:0;z-index:60;padding:0 16px;transition:all .2s var(--ease)}
  .nav-shell{
    position:relative;
    max-width:1180px;margin:0 auto;height:64px;
    display:flex;align-items:center;gap:16px;
    padding:0 10px 0 20px;
    border-radius:var(--radius-pill);
    border:1px solid var(--line);
    background:rgba(246,244,239,.86);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    transition:box-shadow .2s var(--ease),background .2s var(--ease);
  }
  .site-header.is-scrolled .nav-shell{box-shadow:var(--shadow-md);background:rgba(246,244,239,.94)}
  .brand{display:inline-flex;align-items:center;gap:10px;font-size:16px;font-weight:800;letter-spacing:-.02em;color:var(--ink);white-space:nowrap}
  .brand-dot{width:10px;height:10px;border-radius:3px;background:var(--accent);flex:0 0 auto}
  .nav-menu{display:flex;align-items:center;gap:2px;margin-left:auto}
  .nav-menu a{
    display:inline-flex;align-items:center;height:40px;padding:0 14px;
    border-radius:var(--radius-pill);
    font-size:14.5px;font-weight:600;color:var(--muted);
    transition:color .2s var(--ease),background .2s var(--ease);
  }
  .nav-menu a:hover{color:var(--ink);background:rgba(14,17,22,.05)}
  .nav-menu a.is-active{background:var(--ink);color:var(--invert)}
  .nav-menu .nav-menu-cta{display:none}
  .nav-cta{
    display:inline-flex;align-items:center;height:44px;padding:0 22px;
    border-radius:var(--radius-pill);
    background:var(--ink);color:var(--invert);
    font-size:14.5px;font-weight:600;white-space:nowrap;
    transition:background .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
  }
  .nav-cta:hover{background:var(--accent);transform:translateY(-2px);box-shadow:var(--shadow-md)}
  .nav-cta:active{transform:translateY(0)}
  .nav-toggle{
    display:none;flex-direction:column;align-items:center;justify-content:center;gap:5px;
    width:44px;height:44px;margin-left:auto;
    background:transparent;border:1px solid var(--line);border-radius:var(--radius-pill);
    cursor:pointer;transition:border-color .2s var(--ease);
  }
  .nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:transform .2s var(--ease),opacity .2s var(--ease)}
  .nav-toggle:hover{border-color:rgba(255,74,28,.38)}

  @media (max-width:1023px){
    body{padding-top:92px}
    .nav-shell{height:58px;padding:0 8px 0 16px}
    .nav-toggle{display:flex}
    .nav-cta{display:none}
    .nav-menu{
      position:absolute;top:calc(100% + 12px);left:0;right:0;
      display:none;flex-direction:column;align-items:stretch;gap:2px;
      margin-left:0;padding:12px;
      background:var(--surface);border:1px solid var(--line);
      border-radius:var(--radius-card);box-shadow:var(--shadow-lg);
    }
    .nav-shell.is-open .nav-menu{display:flex}
    .nav-menu a{height:52px;padding:0 16px;font-size:17px;font-weight:700;color:var(--ink-soft);border-radius:var(--radius-img);justify-content:flex-start}
    .nav-menu .nav-menu-cta{display:inline-flex;justify-content:center;margin-top:8px;background:var(--ink);color:var(--invert);font-weight:700}
    .nav-shell.is-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
    .nav-shell.is-open .nav-toggle span:nth-child(2){opacity:0}
    .nav-shell.is-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  }

  /* ---------- 通用记号与板块 ---------- */
  .mark{display:block;width:64px;height:3px;background:var(--accent);border-radius:2px}
  .section{padding:64px 0}
  @media (min-width:768px){.section{padding:88px 0}}
  @media (min-width:1280px){.section{padding:112px 0}}
  .sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;padding-bottom:24px;border-bottom:1px solid var(--line);margin-bottom:32px}
  .sec-head h2{font-size:28px;font-weight:700;letter-spacing:-.02em;line-height:1.22;color:var(--ink)}
  @media (min-width:768px){.sec-head h2{font-size:36px}}
  .sec-head p{margin-top:10px;font-size:15.5px;color:var(--muted);max-width:640px}
  .text-link{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--ink);position:relative}
  .text-link::after{content:"";position:absolute;left:0;bottom:-4px;width:100%;height:1px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .18s var(--ease)}
  .text-link:hover::after{transform:scaleX(1)}
  .text-link .arrow{transition:transform .2s var(--ease)}
  .text-link:hover .arrow{transform:translateX(4px)}

  /* ---------- 面包屑 ---------- */
  .breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:20px 0 24px;font-size:14px;color:var(--muted)}
  .breadcrumb a{transition:color .2s var(--ease)}
  .breadcrumb a:hover{color:var(--ink)}
  .breadcrumb .sep{color:var(--line)}
  .breadcrumb .current{color:var(--ink);font-weight:600}

  /* ---------- Hero ---------- */
  .cat-hero{padding-top:8px}
  .hero-grid{
    display:grid;grid-template-columns:1fr;gap:40px;
    padding:24px 0 56px;border-bottom:1px solid var(--line);
  }
  @media (min-width:1024px){
    .hero-grid{grid-template-columns:1.25fr .85fr;gap:56px;align-items:center;padding:40px 0 72px}
  }
  .hero-grid h1{
    margin-top:18px;
    font-size:clamp(34px,7vw,64px);
    font-weight:900;letter-spacing:-.03em;line-height:1.12;color:var(--ink);
  }
  .hero-sub{margin-top:18px;font-size:17px;font-weight:600;color:var(--ink);max-width:620px;line-height:1.65}
  @media (min-width:768px){.hero-sub{font-size:19px}}
  .hero-p{margin-top:18px;font-size:16px;color:var(--muted);max-width:660px}
  .anchor-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
  .anchor-row a{
    display:inline-flex;align-items:center;height:40px;padding:0 18px;
    border:1px solid var(--line);border-radius:var(--radius-pill);
    background:var(--surface);font-size:14px;font-weight:600;color:var(--ink-soft);
    transition:border-color .2s var(--ease),transform .2s var(--ease),color .2s var(--ease);
  }
  .anchor-row a:hover{border-color:rgba(255,74,28,.38);color:var(--ink);transform:translateY(-2px)}
  .hero-stats{display:flex;flex-wrap:wrap;margin-top:36px;border-top:1px solid var(--line)}
  .stat{flex:1 1 120px;padding:20px 20px 0 0}
  .stat + .stat{padding-left:20px;border-left:1px solid var(--line)}
  .stat b{display:block;font-size:26px;font-weight:800;color:var(--ink);letter-spacing:-.02em;line-height:1.2}
  .stat span{display:block;margin-top:6px;font-size:12.5px;color:var(--muted)}
  .hero-media img{
    width:100%;aspect-ratio:4/3;object-fit:cover;
    border-radius:var(--radius-card);border:1px solid var(--line);box-shadow:var(--shadow-sm);
  }
  @media (min-width:1024px){.hero-media img{aspect-ratio:5/4}}

  /* ---------- 筛选标签条 ---------- */
  .tabbar{display:flex;gap:10px;overflow-x:auto;padding:4px 0 4px;scrollbar-width:none;-ms-overflow-style:none}
  .tabbar::-webkit-scrollbar{display:none}
  .tab{
    flex:0 0 auto;display:inline-flex;align-items:center;height:44px;padding:0 20px;
    border:1px solid var(--line);border-radius:var(--radius-pill);
    background:var(--surface);font-size:14.5px;font-weight:600;color:var(--muted);
    transition:border-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease),background .2s var(--ease);
  }
  .tab:hover{border-color:rgba(255,74,28,.38);color:var(--ink);transform:translateY(-2px)}
  .tab.is-current{background:var(--ink);border-color:var(--ink);color:var(--invert)}

  /* ---------- 卡片网格 ---------- */
  .card-grid{display:grid;grid-template-columns:1fr;gap:20px}
  @media (min-width:640px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}}
  @media (min-width:1024px){.card-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
  .dcard{
    display:flex;flex-direction:column;gap:12px;
    padding:24px;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    box-shadow:var(--shadow-sm);
    transition:transform .32s var(--ease),border-color .32s var(--ease),box-shadow .32s var(--ease);
  }
  .dcard:hover{transform:translateY(-4px);border-color:rgba(255,74,28,.38);box-shadow:var(--shadow-md)}
  .dcard h3{font-size:18px;font-weight:700;line-height:1.45;color:var(--ink);letter-spacing:-.01em}
  .dcard p{
    font-size:15px;line-height:1.8;color:var(--muted);
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:auto;padding-top:16px;border-top:1px solid var(--line);font-size:12.5px;color:var(--muted)}
  .badge-cat{
    display:inline-flex;align-items:center;height:22px;padding:0 10px;
    border-radius:6px;background:var(--field-soft);color:var(--field);
    font-size:12px;font-weight:600;
  }
  .badge-ink{
    display:inline-flex;align-items:center;height:22px;padding:0 10px;
    border-radius:6px;background:var(--ink);color:var(--invert);
    font-size:12px;font-weight:600;
  }

  /* ---------- 分页 ---------- */
  .pager{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin-top:44px}
  .pager a{
    display:inline-flex;align-items:center;justify-content:center;
    min-width:44px;height:44px;padding:0 16px;
    border:1px solid var(--line);border-radius:var(--radius-pill);
    background:var(--surface);font-size:14.5px;font-weight:600;color:var(--ink-soft);
    transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease),transform .2s var(--ease);
  }
  .pager a:hover{border-color:rgba(255,74,28,.38);color:var(--ink);transform:translateY(-2px)}
  .pager a.is-current{background:var(--ink);border-color:var(--ink);color:var(--invert);transform:none}
  .pager .page-num{display:inline-flex}
  @media (max-width:639px){.pager .page-num{display:none}}

  /* ---------- 相关推荐横滚卡带 ---------- */
  .rail{
    display:grid;grid-auto-flow:column;grid-auto-columns:82%;
    gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
    padding-bottom:12px;scrollbar-width:thin;
  }
  @media (min-width:640px){.rail{grid-auto-columns:46%}}
  @media (min-width:1024px){.rail{grid-auto-columns:32%}}
  .rcard{
    scroll-snap-align:start;
    display:flex;flex-direction:column;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    overflow:hidden;
    box-shadow:var(--shadow-sm);
    transition:transform .32s var(--ease),border-color .32s var(--ease),box-shadow .32s var(--ease);
  }
  .rcard:hover{transform:translateY(-4px);border-color:rgba(255,74,28,.38);box-shadow:var(--shadow-md)}
  .rcard img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .32s var(--ease)}
  .rcard:hover img{transform:scale(1.04)}
  .rcard-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
  .rcard-body h3{font-size:17px;font-weight:700;color:var(--ink);line-height:1.45}
  .rcard-body p{font-size:14.5px;color:var(--muted);line-height:1.75}
  .rail-hint{margin-top:8px;font-size:13px;color:var(--muted);text-align:right}

  /* ---------- FAQ ---------- */
  .faq{max-width:880px;margin:0 auto}
  .faq-item{border-top:1px solid var(--line)}
  .faq-item:last-child{border-bottom:1px solid var(--line)}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
    padding:24px 0;background:none;border:0;text-align:left;cursor:pointer;
    font-size:18px;font-weight:600;color:var(--ink);line-height:1.5;
    transition:color .2s var(--ease);
  }
  .faq-q:hover{color:var(--accent-deep)}
  .faq-icon{
    flex:0 0 auto;width:26px;height:26px;border-radius:50%;
    border:1px solid var(--line);position:relative;
    transition:border-color .26s var(--ease),transform .26s var(--ease),background .26s var(--ease);
  }
  .faq-icon::before,.faq-icon::after{
    content:"";position:absolute;top:50%;left:50%;background:var(--ink);
    transform:translate(-50%,-50%);transition:opacity .26s var(--ease),background .26s var(--ease);
  }
  .faq-icon::before{width:11px;height:1.5px}
  .faq-icon::after{width:1.5px;height:11px}
  .faq-item.is-open .faq-icon{border-color:var(--accent);background:rgba(255,74,28,.08)}
  .faq-item.is-open .faq-icon::after{opacity:0}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .26s var(--ease)}
  .faq-a p{padding:0 0 24px;font-size:15px;line-height:1.8;color:var(--muted);max-width:760px}
  .faq-item.is-open .faq-a{max-height:320px}

  /* ---------- 收藏 / 分享 CTA ---------- */
  .share-cta{
    display:flex;flex-direction:column;gap:28px;
    padding:40px 28px;
    background:var(--ink);color:var(--invert);
    border-radius:24px;
    box-shadow:inset 0 0 0 1px rgba(251,250,247,.14), var(--shadow-md);
  }
  @media (min-width:768px){.share-cta{padding:52px 48px}}
  @media (min-width:1024px){.share-cta{flex-direction:row;align-items:center;justify-content:space-between;gap:48px}}
  .share-cta h2{font-size:26px;font-weight:800;letter-spacing:-.02em;line-height:1.3;color:var(--invert)}
  @media (min-width:768px){.share-cta h2{font-size:30px}}
  .share-cta p{margin-top:12px;font-size:15px;line-height:1.8;color:rgba(251,250,247,.72);max-width:560px}
  .share-actions{display:flex;flex-wrap:wrap;gap:12px}
  .ghost-pill{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:46px;padding:0 24px;
    border:1px solid rgba(251,250,247,.35);border-radius:var(--radius-pill);
    background:transparent;color:var(--invert);
    font-size:14.5px;font-weight:600;cursor:pointer;
    transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease),border-color .2s var(--ease);
  }
  .ghost-pill:hover{background:var(--invert);color:var(--ink);border-color:var(--invert);transform:translateY(-2px)}
  .ghost-pill:active{transform:translateY(0)}
  @media (max-width:639px){.share-actions{flex-direction:column}.ghost-pill{width:100%}}

  /* ---------- 页脚 ---------- */
  .site-footer{margin-top:0;background:var(--ink);color:var(--invert);border-top:1px solid rgba(251,250,247,.16)}
  .footer-grid{display:grid;grid-template-columns:1fr;gap:36px;padding:56px 0 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:44px;padding:64px 0 48px}}
  .footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:800;color:var(--invert);letter-spacing:-.01em;margin-bottom:14px}
  .footer-col h3{font-size:15px;font-weight:700;color:var(--invert);margin-bottom:16px}
  .footer-col p{font-size:14.5px;line-height:1.8;color:rgba(251,250,247,.68);max-width:340px}
  .footer-col ul li{margin-bottom:10px}
  .footer-col ul a{font-size:14.5px;color:rgba(251,250,247,.72);transition:color .2s var(--ease)}
  .footer-col ul a:hover{color:var(--accent)}
  .footer-bottom{
    display:flex;flex-direction:column;gap:10px;
    padding:20px 0 28px;border-top:1px solid rgba(251,250,247,.12);
    font-size:13px;color:rgba(251,250,247,.6);
  }
  @media (min-width:768px){.footer-bottom{flex-direction:row;align-items:center;justify-content:space-between;gap:24px}}

  /* ---------- 进场动效 ---------- */
  .reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
  .reveal.is-visible{opacity:1;transform:none}
  @media (prefers-reduced-motion:reduce){
    *{animation:none !important;transition:none !important}
    .reveal{opacity:1;transform:none}
    html{scroll-behavior:auto}
  }

/* roulang page: category2 */
:root{
  --ink:#0E1116;
  --ink-soft:#1C2027;
  --accent:#FF4A1C;
  --accent-deep:#D93A10;
  --field:#1B6E5A;
  --field-soft:#E4EFEA;
  --base:#F6F4EF;
  --surface:#FFFFFF;
  --line:#E6E1D8;
  --muted:#6E6A63;
  --invert:#FBFAF7;
  --radius-pill:999px;
  --radius-card:20px;
  --radius-md:16px;
  --radius-input:12px;
  --radius-badge:6px;
  --radius-img:14px;
  --shadow-sm:0 1px 2px rgba(14,17,22,.05);
  --shadow-md:0 8px 24px -12px rgba(14,17,22,.18);
  --shadow-lg:0 24px 60px -24px rgba(14,17,22,.28);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body.page-body{
  margin:0;
  background-color:var(--base);
  color:var(--ink-soft);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans","system-ui",-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3{margin:0;color:var(--ink);font-weight:800;letter-spacing:-.02em}
p{margin:0}
figure{margin:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
@media (min-width:768px){.container{padding-left:32px;padding-right:32px}}
@media (min-width:1280px){.container{padding-left:48px;padding-right:48px}}

/* ---------- 悬浮胶囊导航 ---------- */
.site-header{
  position:fixed;
  top:16px;
  left:0;
  right:0;
  z-index:60;
  padding-left:16px;
  padding-right:16px;
}
.nav-shell{
  position:relative;
  max-width:1180px;
  margin:0 auto;
  display:flex;
  align-items:center;
  gap:18px;
  height:64px;
  padding:0 12px 0 20px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:rgba(246,244,239,.86);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  transition:box-shadow .2s var(--ease),background-color .2s var(--ease);
}
.nav-shell.is-scrolled{
  background:rgba(246,244,239,.94);
  box-shadow:var(--shadow-md);
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:16px;
  font-weight:800;
  letter-spacing:-.02em;
  color:var(--ink);
  white-space:nowrap;
}
.brand-dot{
  width:10px;
  height:10px;
  border-radius:3px;
  background:var(--accent);
  flex:0 0 auto;
}
.brand-text{line-height:1.2}
.nav-menu{
  display:flex;
  align-items:center;
  gap:2px;
  margin-left:auto;
}
.nav-menu li{display:flex}
.nav-menu li > a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:8px 14px;
  border-radius:var(--radius-pill);
  font-size:15px;
  font-weight:500;
  color:var(--ink-soft);
  transition:color .2s var(--ease),background-color .2s var(--ease);
}
.nav-menu li > a:hover{color:var(--ink);background:rgba(14,17,22,.05)}
.nav-menu li > a.is-active{background:var(--ink);color:var(--invert);font-weight:600}
.nav-menu a.nav-menu-cta{display:none}
.nav-cta{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:11px 22px;
  border-radius:var(--radius-pill);
  background:var(--ink);
  color:var(--invert);
  font-size:14px;
  font-weight:600;
  white-space:nowrap;
  transition:background-color .2s var(--ease),transform .2s var(--ease);
}
.nav-cta:hover{background:var(--accent);transform:translateY(-2px)}
.nav-cta:active{transform:translateY(0)}
.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  margin-left:auto;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
  background:var(--surface);
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:transform .2s var(--ease),opacity .2s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- 主体 ---------- */
main{display:block;padding-top:104px}
.section{padding:64px 0}
@media (min-width:768px){.section{padding:88px 0}}
@media (min-width:1280px){.section{padding:112px 0}}
.section-head{margin-bottom:32px;max-width:760px}
.section-head h2{
  font-size:clamp(26px,3.4vw,38px);
  line-height:1.22;
  letter-spacing:-.02em;
  font-weight:700;
}
.section-head p{margin-top:14px;font-size:16px;color:var(--muted)}
.rule-mark{display:block;width:64px;height:3px;background:var(--accent);margin-bottom:20px}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding:20px 0 4px;
  font-size:14px;
  color:var(--muted);
}
.breadcrumb a{transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--ink)}
.breadcrumb .sep{color:#CFC8BC}
.breadcrumb .current{color:var(--ink);font-weight:600}

/* ---------- 页头 ---------- */
.page-head{padding:24px 0 8px}
.page-head-grid{display:grid;grid-template-columns:1fr;gap:40px}
@media (min-width:1024px){
  .page-head-grid{grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:56px;align-items:center}
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 12px;
  border-radius:var(--radius-badge);
  background:var(--field-soft);
  color:var(--field);
  font-size:13px;
  font-weight:600;
  letter-spacing:.02em;
}
.page-head h1{
  margin-top:22px;
  font-size:clamp(32px,4.6vw,60px);
  font-weight:900;
  line-height:1.12;
  letter-spacing:-.03em;
}
.page-sub{
  margin-top:18px;
  font-size:17px;
  color:var(--muted);
  max-width:620px;
  line-height:1.8;
}
.page-intro{margin-top:22px;max-width:640px}
.page-intro p{font-size:16px;line-height:1.9;color:var(--ink-soft)}
.page-intro p + p{margin-top:16px}
.page-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.btn-primary{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:48px;
  padding:13px 26px;
  border-radius:var(--radius-pill);
  background:var(--ink);
  color:var(--invert);
  font-size:15px;
  font-weight:600;
  transition:background-color .2s var(--ease),transform .2s var(--ease);
}
.btn-primary:hover{background:var(--accent);transform:translateY(-2px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:48px;
  padding:12px 24px;
  border:1.5px solid var(--ink);
  border-radius:var(--radius-pill);
  color:var(--ink);
  font-size:15px;
  font-weight:600;
  background:transparent;
  transition:background-color .2s var(--ease),transform .2s var(--ease);
}
.btn-ghost:hover{background:rgba(14,17,22,.08);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.anchor-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:32px}
.anchor-tags a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:8px 16px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:var(--surface);
  font-size:14px;
  color:var(--ink-soft);
  transition:border-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.anchor-tags a:hover{border-color:rgba(255,74,28,.38);color:var(--ink);transform:translateY(-2px)}
.page-head-visual{position:relative}
.page-head-visual img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-md);
}
.page-head-visual figcaption{
  margin-top:14px;
  font-size:13px;
  color:var(--muted);
  text-align:center;
}

/* ---------- 目录 + 编号索引流 ---------- */
.split{display:grid;grid-template-columns:1fr;gap:32px}
@media (min-width:1024px){
  .split{grid-template-columns:200px minmax(0,1fr);gap:64px;align-items:start}
}
.toc{
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  background:var(--surface);
  padding:18px 18px 20px;
}
@media (min-width:1024px){
  .toc{position:sticky;top:110px;padding:22px 20px 24px;box-shadow:var(--shadow-sm)}
}
.toc-title{
  font-size:12px;
  font-weight:700;
  letter-spacing:.12em;
  color:var(--muted);
  margin-bottom:14px;
}
.toc-list{display:flex;gap:6px;overflow-x:auto;padding-bottom:2px}
.toc-list li{flex:0 0 auto}
@media (min-width:1024px){
  .toc-list{display:block;overflow:visible}
  .toc-list li{flex:none}
}
.toc-list a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  min-height:40px;
  padding:8px 14px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line);
  font-size:14px;
  color:var(--muted);
  white-space:nowrap;
  transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.toc-list a:hover{color:var(--ink);border-color:rgba(255,74,28,.38)}
.toc-list a.is-current{color:var(--accent-deep);font-weight:600;border-color:rgba(255,74,28,.38);background:rgba(255,74,28,.05)}
@media (min-width:1024px){
  .toc-list li + li{margin-top:2px}
  .toc-list a{
    border:0;
    border-top:1px solid var(--line);
    border-radius:0;
    padding:14px 0;
    background:transparent;
    white-space:normal;
  }
  .toc-list a.is-current{background:transparent;color:var(--accent-deep)}
  .toc-list a::after{content:"→";font-size:13px;color:#CFC8BC;transition:transform .2s var(--ease),color .2s var(--ease)}
  .toc-list a:hover::after{transform:translateX(3px);color:var(--accent)}
}
.flow-head{margin-bottom:8px}
.flow-head h2{font-size:clamp(24px,3vw,34px);font-weight:700;line-height:1.24}
.flow-head p{margin-top:12px;color:var(--muted);font-size:16px;max-width:680px}
.flow-group{padding-top:30px}
.flow-group-title{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--field);
  margin-bottom:4px;
}
.flow-group-title::before{content:"";width:20px;height:3px;background:var(--field);border-radius:2px}
.index-item{
  display:flex;
  align-items:flex-start;
  gap:22px;
  padding:24px 4px;
  border-bottom:1px solid var(--line);
  transition:background-color .32s var(--ease),padding-left .32s var(--ease);
}
.index-item:hover{background:rgba(255,255,255,.72);padding-left:12px}
.index-no{
  flex:0 0 auto;
  min-width:56px;
  font-size:34px;
  font-weight:900;
  line-height:1;
  color:transparent;
  -webkit-text-stroke:1px var(--line);
  transition:-webkit-text-stroke-color .32s var(--ease);
}
.index-item:hover .index-no{-webkit-text-stroke-color:var(--accent)}
.index-body h3{font-size:19px;font-weight:700;line-height:1.45;letter-spacing:-.01em}
.index-body p{margin-top:8px;font-size:15px;line-height:1.78;color:var(--muted);max-width:640px}
.index-go{
  margin-left:auto;
  align-self:center;
  flex:0 0 auto;
  font-size:15px;
  color:#CFC8BC;
  transition:transform .32s var(--ease),color .2s var(--ease);
}
.index-item:hover .index-go{transform:translateX(4px);color:var(--accent)}

/* ---------- 自检表 ---------- */
.table-wrap{
  overflow-x:auto;
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  background:var(--surface);
  box-shadow:var(--shadow-sm);
}
@media (max-width:767px){
  .table-wrap{
    -webkit-mask-image:linear-gradient(to right,#000 82%,transparent 100%);
    mask-image:linear-gradient(to right,#000 82%,transparent 100%);
  }
}
table.check-table{width:100%;min-width:680px;border-collapse:collapse}
.check-table th{
  padding:14px 20px;
  background:var(--base);
  font-size:13px;
  font-weight:600;
  color:var(--muted);
  text-align:left;
  letter-spacing:.02em;
  white-space:nowrap;
}
.check-table td{
  padding:16px 20px;
  border-top:1px solid var(--line);
  font-size:15px;
  color:var(--ink-soft);
  vertical-align:top;
}
.check-table tbody tr:nth-child(even){background:#FBFAF7}
.check-table td:first-child{font-weight:600;color:var(--ink);white-space:nowrap}
.tag-field{
  display:inline-block;
  padding:4px 10px;
  border-radius:var(--radius-badge);
  background:var(--field-soft);
  color:var(--field);
  font-size:12px;
  font-weight:600;
}

/* ---------- 相关推荐 ---------- */
.rec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:32px}
.text-btn{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:15px;
  font-weight:600;
  color:var(--ink);
  padding-bottom:2px;
}
.text-btn::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:100%;
  height:1px;
  background:var(--accent);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .18s var(--ease);
}
.text-btn:hover::after{transform:scaleX(1)}
.text-btn:hover{color:var(--accent-deep)}
.rec-grid{display:grid;grid-template-columns:1fr;gap:24px}
@media (min-width:640px){.rec-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.rec-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.rec-card{
  display:flex;
  flex-direction:column;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--surface);
  box-shadow:var(--shadow-sm);
  transition:transform .32s var(--ease),border-color .32s var(--ease),box-shadow .32s var(--ease);
}
.rec-card:hover{
  transform:translateY(-4px);
  border-color:rgba(255,74,28,.38);
  box-shadow:var(--shadow-md);
}
.rec-card img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  transition:transform .32s var(--ease);
}
.rec-card:hover img{transform:scale(1.04)}
.rec-card-body{padding:22px 22px 26px;display:flex;flex-direction:column;gap:10px}
.rec-card-body h3{font-size:18px;font-weight:700;line-height:1.45}
.rec-card-body p{font-size:14px;color:var(--muted);line-height:1.75}
.rec-card-body .text-btn{margin-top:6px}
.badge-cat{
  display:inline-block;
  padding:4px 10px;
  border-radius:var(--radius-badge);
  background:var(--field-soft);
  color:var(--field);
  font-size:12px;
  font-weight:600;
}
.badge-time{font-size:13px;color:var(--muted)}

/* ---------- FAQ ---------- */
.faq{max-width:880px;margin:0 auto}
.faq-item{border-top:1px solid var(--line)}
.faq-item:last-child{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-height:56px;
  padding:22px 4px;
  font-size:18px;
  font-weight:600;
  color:var(--ink);
  text-align:left;
  line-height:1.5;
}
.faq-q:hover{color:var(--accent-deep)}
.faq-icon{
  position:relative;
  flex:0 0 20px;
  width:20px;
  height:20px;
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  left:50%;
  top:50%;
  background:var(--ink);
  border-radius:2px;
  transition:transform .26s var(--ease),background-color .26s var(--ease);
}
.faq-icon::before{width:14px;height:1.5px;transform:translate(-50%,-50%)}
.faq-icon::after{width:1.5px;height:14px;transform:translate(-50%,-50%)}
.faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) scaleY(0)}
.faq-item.is-open .faq-icon::before{background:var(--accent)}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .26s var(--ease);
}
.faq-a-inner{padding:0 4px 24px;font-size:15px;line-height:1.85;color:var(--muted);max-width:760px}

/* ---------- CTA 收尾 ---------- */
.cta-block{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
  padding:40px;
  border:1px solid rgba(251,250,247,.14);
  border-radius:24px;
  background:var(--ink);
  color:var(--invert);
}
@media (min-width:1024px){.cta-block{padding:56px}}
.cta-block h2{color:var(--invert);font-size:clamp(22px,3vw,30px);line-height:1.28;font-weight:700}
.cta-block p{margin-top:12px;font-size:15px;line-height:1.8;color:rgba(251,250,247,.68);max-width:520px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
@media (max-width:639px){.cta-actions{width:100%;flex-direction:column}.cta-actions .pill-btn{width:100%;justify-content:center}}
.pill-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:12px 22px;
  border:1px solid rgba(251,250,247,.35);
  border-radius:var(--radius-pill);
  color:var(--invert);
  font-size:14px;
  font-weight:600;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.pill-btn:hover{background:var(--invert);color:var(--ink);border-color:var(--invert)}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:96px;
  padding:64px 0 28px;
  background:var(--ink);
  color:var(--invert);
  border-top:1px solid rgba(251,250,247,.14);
}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:800;color:var(--invert)}
.footer-col p{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(251,250,247,.6);max-width:320px}
.footer-col h3{font-size:14px;font-weight:600;letter-spacing:.04em;color:var(--invert);margin-bottom:16px}
.footer-col ul li + li{margin-top:10px}
.footer-col ul a{
  position:relative;
  display:inline-block;
  font-size:14px;
  color:rgba(251,250,247,.66);
  transition:color .2s var(--ease);
}
.footer-col ul a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-2px;
  width:100%;
  height:1px;
  background:var(--accent);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .18s var(--ease);
}
.footer-col ul a:hover{color:var(--accent)}
.footer-col ul a:hover::after{transform:scaleX(1)}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:12px 24px;
  justify-content:space-between;
  margin-top:48px;
  padding-top:22px;
  border-top:1px solid rgba(251,250,247,.14);
  font-size:13px;
  color:rgba(251,250,247,.6);
}

/* ---------- 进场动画 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .32s var(--ease),transform .32s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  *{animation:none !important;transition-duration:.01ms !important}
  html{scroll-behavior:auto}
}

/* ---------- 移动端导航 ---------- */
@media (max-width:1023px){
  main{padding-top:96px}
  .nav-shell{height:56px;padding:0 8px 0 16px;gap:12px}
  .nav-toggle{display:flex}
  .nav-cta{display:none}
  .nav-menu{
    position:absolute;
    top:calc(100% + 12px);
    left:0;
    right:0;
    margin-left:0;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:2px;
    padding:14px;
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    background:var(--surface);
    box-shadow:var(--shadow-lg);
  }
  .nav-menu.is-open{display:flex}
  .nav-menu li{display:block}
  .nav-menu li > a{
    display:flex;
    min-height:52px;
    padding:12px 16px;
    border-radius:var(--radius-input);
    font-size:17px;
    font-weight:600;
    justify-content:flex-start;
  }
  .nav-menu li > a.is-active{background:var(--ink);color:var(--invert)}
  .nav-menu a.nav-menu-cta{
    display:flex;
    justify-content:center;
    margin-top:12px;
    min-height:48px;
    border-radius:var(--radius-pill);
    background:var(--ink);
    color:var(--invert);
  }
  .nav-menu a.nav-menu-cta::before{content:"查看登录指引"}
  .nav-menu a.nav-menu-cta{font-size:0}
  .nav-menu a.nav-menu-cta::before{font-size:15px;font-weight:600}
}
@media (max-width:639px){
  .page-head h1{font-size:32px}
  .index-item{gap:16px;padding:22px 2px}
  .index-no{min-width:44px;font-size:28px}
  .index-body h3{font-size:17px}
  .cta-block{padding:32px 24px}
  .brand-text{font-size:15px}
}

/* roulang page: category4 */
:root{
    --ink:#0E1116;
    --ink-soft:#1C2027;
    --accent:#FF4A1C;
    --accent-deep:#D93A10;
    --field:#1B6E5A;
    --field-soft:#E4EFEA;
    --base:#F6F4EF;
    --surface:#FFFFFF;
    --line:#E6E1D8;
    --muted:#6E6A63;
    --invert:#FBFAF7;
    --r-pill:999px;
    --r-card:20px;
    --r-md:16px;
    --r-img:14px;
    --sh-sm:0 1px 2px rgba(14,17,22,.05);
    --sh-md:0 8px 24px -12px rgba(14,17,22,.18);
    --sh-lg:0 24px 60px -24px rgba(14,17,22,.28);
    --ease:cubic-bezier(.22,.61,.36,1);
    --gap-section:64px;
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--base);
    color:var(--ink-soft);
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
    font-size:16px;
    line-height:1.85;
    font-variant-numeric:tabular-nums;
    -webkit-font-smoothing:antialiased;
  }
  a{color:inherit;text-decoration:none;}
  img{max-width:100%;display:block;}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
  :focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}
  .container{max-width:1240px;margin:0 auto;padding:0 20px;}
  @media (min-width:768px){.container{padding:0 32px;}}
  @media (min-width:1280px){.container{padding:0 48px;}}

  /* ---------- 导航 ---------- */
  .site-header{position:fixed;top:16px;left:0;right:0;z-index:80;padding:0 16px;}
  .nav-shell{
    position:relative;max-width:1180px;margin:0 auto;height:56px;
    display:flex;align-items:center;gap:12px;padding:0 12px 0 16px;
    border:1px solid var(--line);border-radius:var(--r-pill);
    background:rgba(246,244,239,.86);backdrop-filter:blur(14px);
    transition:box-shadow .24s var(--ease),background .24s var(--ease);
  }
  .site-header.is-scrolled .nav-shell{background:rgba(246,244,239,.94);box-shadow:var(--sh-md);}
  @media (min-width:1024px){.nav-shell{height:64px;padding:0 18px 0 24px;gap:20px;}}
  .brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);letter-spacing:-.01em;font-size:15px;white-space:nowrap;}
  .brand-dot{width:9px;height:9px;border-radius:3px;background:var(--accent);flex:none;}
  .brand-text{font-size:15px;}
  @media (min-width:1024px){.brand-text{font-size:16.5px;}}
  .nav-menu{list-style:none;margin:0;padding:0;display:none;align-items:center;gap:2px;margin-left:auto;}
  .nav-menu a{display:inline-flex;align-items:center;justify-content:flex-start;height:40px;padding:0 14px;border-radius:var(--r-pill);font-size:14.5px;font-weight:600;color:var(--ink-soft);transition:color .2s var(--ease),background .2s var(--ease);}
  .nav-menu a:hover{color:var(--ink);background:rgba(14,17,22,.06);}
  .nav-menu a.is-active{background:var(--ink);color:var(--invert);}
  .nav-menu-cta{display:none;}
  .nav-cta{display:none;}
  @media (min-width:1024px){
    .nav-cta{display:inline-flex;align-items:center;justify-content:center;height:44px;padding:0 22px;border-radius:var(--r-pill);background:var(--ink);color:var(--invert);font-weight:600;font-size:14.5px;transition:background .2s var(--ease),transform .2s var(--ease);}
    .nav-cta:hover{background:var(--accent);transform:translateY(-2px);}
  }
  .nav-toggle{display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;width:44px;height:44px;margin-left:auto;border-radius:var(--r-pill);}
  .nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:transform .22s var(--ease),opacity .22s var(--ease);}
  .nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  .nav-toggle.is-open span:nth-child(2){opacity:0;}
  .nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
  @media (min-width:1024px){.nav-toggle{display:none;}}
  @media (max-width:1023px){
    .nav-menu{position:absolute;top:calc(100% + 12px);left:0;right:0;display:none;flex-direction:column;align-items:stretch;gap:2px;padding:10px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-md);}
    .nav-menu.is-open{display:flex;}
    .nav-menu a{height:56px;padding:0 20px;border-radius:var(--r-md);font-size:16px;font-weight:700;}
    .nav-menu-cta{display:inline-flex;justify-content:center;height:48px;margin-top:8px;background:var(--ink);color:var(--invert);}
    .nav-menu-cta:hover{background:var(--accent);color:var(--invert);}
  }

  /* ---------- 通用板块 ---------- */
  .section{padding:64px 0;}
  @media (min-width:768px){.section{padding:88px 0;}}
  @media (min-width:1024px){.section{padding:112px 0;}}
  .sec-head{max-width:760px;margin-bottom:32px;}
  @media (min-width:1024px){.sec-head{margin-bottom:48px;}}
  .sec-kicker{margin:0 0 12px;font-size:13px;font-weight:600;letter-spacing:.14em;color:var(--muted);}
  .sec-title{margin:0;font-size:26px;font-weight:700;letter-spacing:-.02em;line-height:1.22;color:var(--ink);}
  @media (min-width:768px){.sec-title{font-size:34px;}}
  @media (min-width:1024px){.sec-title{font-size:38px;}}
  .sec-desc{margin:16px 0 0;font-size:16px;line-height:1.8;color:var(--muted);max-width:640px;}
  .mark-line{display:block;width:64px;height:3px;background:var(--accent);border-radius:2px;margin-bottom:20px;}
  .divider{height:1px;background:var(--line);border:0;margin:0;}

  .btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 24px;border-radius:var(--r-pill);background:var(--ink);color:var(--invert);font-size:15px;font-weight:600;transition:background .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);}
  .btn-primary:hover{background:var(--accent);transform:translateY(-2px);box-shadow:var(--sh-md);}
  .btn-primary:active{transform:translateY(0);}
  @media (min-width:768px){.btn-primary{height:48px;}}
  .btn-ghost{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 22px;border-radius:var(--r-pill);border:1.5px solid var(--ink);color:var(--ink);font-size:15px;font-weight:600;transition:background .2s var(--ease),transform .2s var(--ease);}
  .btn-ghost:hover{background:rgba(14,17,22,.08);transform:translateY(-2px);}
  .btn-text{display:inline-flex;align-items:center;gap:8px;font-size:14.5px;font-weight:600;color:var(--accent-deep);position:relative;padding:6px 0;}
  .btn-text .arw{transition:transform .2s var(--ease);}
  .btn-text:hover .arw{transform:translateX(4px);}
  .btn-text::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:currentColor;transform:scaleX(0);transform-origin:left;transition:transform .18s var(--ease);}
  .btn-text:hover::after{transform:scaleX(1);}

  .badge-cat{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:6px;background:var(--field-soft);color:var(--field);font-size:12px;font-weight:600;letter-spacing:.02em;}
  .badge-ink{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:6px;background:var(--ink);color:var(--invert);font-size:12px;font-weight:600;}

  .reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
  .reveal.is-visible{opacity:1;transform:none;}

  /* ---------- 分类页首屏 ---------- */
  .page-hero{padding:120px 0 56px;}
  @media (min-width:1024px){.page-hero{padding:168px 0 80px;}}
  .breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--muted);margin-bottom:24px;}
  .breadcrumb a{transition:color .2s var(--ease);}
  .breadcrumb a:hover{color:var(--accent-deep);}
  .breadcrumb .sep{color:var(--line);}
  .breadcrumb .current{color:var(--ink);font-weight:600;}
  .hero-grid{display:grid;gap:40px;align-items:start;}
  @media (min-width:1024px){.hero-grid{grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:56px;align-items:center;}}
  .hero-title{margin:0 0 18px;font-size:32px;font-weight:900;letter-spacing:-.03em;line-height:1.14;color:var(--ink);}
  @media (min-width:768px){.hero-title{font-size:48px;}}
  @media (min-width:1024px){.hero-title{font-size:60px;}}
  .hero-sub{margin:0 0 22px;font-size:17px;font-weight:600;color:var(--ink);line-height:1.6;}
  @media (min-width:768px){.hero-sub{font-size:19px;}}
  .hero-lead{margin:0 0 16px;font-size:16px;line-height:1.85;color:var(--muted);max-width:660px;}
  .tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;}
  .tag-row a{display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:var(--r-pill);border:1px solid var(--line);background:var(--surface);font-size:13.5px;font-weight:600;color:var(--ink-soft);transition:border-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);}
  .tag-row a:hover{border-color:rgba(255,74,28,.38);color:var(--accent-deep);transform:translateY(-2px);}
  .hero-media{position:relative;}
  .hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-card);box-shadow:var(--sh-md);}
  .hero-float{position:absolute;left:16px;bottom:-22px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:14px 18px;box-shadow:var(--sh-md);}
  .hero-float strong{display:block;font-size:22px;font-weight:800;color:var(--ink);line-height:1.2;}
  .hero-float span{font-size:12.5px;color:var(--muted);}

  /* ---------- 杂志错落 ---------- */
  .magazine{border-bottom:1px solid var(--line);}
  .mag-row{position:relative;display:grid;gap:28px;align-items:center;padding:36px 0;border-top:1px solid var(--line);}
  @media (min-width:1024px){.mag-row{padding:52px 0;gap:64px;grid-template-columns:minmax(0,1fr) minmax(0,1fr);}}
  .mag-row .mag-media{order:1;}
  .mag-row .mag-text{order:2;}
  @media (min-width:1024px){
    .mag-row .mag-media{order:2;}
    .mag-row .mag-text{order:1;}
    .mag-row.is-reverse .mag-media{order:1;}
    .mag-row.is-reverse .mag-text{order:2;}
  }
  .mag-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-card);box-shadow:var(--sh-sm);transition:transform .32s var(--ease),box-shadow .32s var(--ease);}
  .mag-media:hover img{transform:scale(1.02);box-shadow:var(--sh-md);}
  .mag-num{display:block;font-size:72px;font-weight:900;line-height:1;letter-spacing:-.04em;color:transparent;-webkit-text-stroke:1px var(--line);margin-bottom:8px;user-select:none;}
  @media (min-width:1024px){.mag-num{font-size:104px;}}
  .mag-title{margin:0 0 14px;font-size:20px;font-weight:700;letter-spacing:-.01em;line-height:1.45;color:var(--ink);}
  @media (min-width:1024px){.mag-title{font-size:23px;}}
  .mag-text p{margin:0 0 14px;font-size:16px;line-height:1.85;color:var(--muted);}
  .mag-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:16px;font-size:13px;color:var(--muted);}

  /* ---------- 速查对照 ---------- */
  .check-list{display:grid;gap:0;border-bottom:1px solid var(--line);}
  @media (min-width:768px){.check-list{grid-template-columns:1fr 1fr;column-gap:56px;}}
  .check-item{display:flex;gap:16px;align-items:flex-start;padding:20px 0;border-top:1px solid var(--line);}
  .check-index{flex:none;min-width:30px;font-size:14px;font-weight:800;color:var(--accent);line-height:1.9;}
  .check-body h3{margin:0 0 6px;font-size:16.5px;font-weight:700;line-height:1.5;color:var(--ink);}
  .check-body p{margin:0;font-size:14.5px;line-height:1.8;color:var(--muted);}

  /* ---------- 排查步骤 ---------- */
  .step-track{display:grid;gap:18px;}
  @media (min-width:768px){.step-track{grid-template-columns:repeat(2,1fr);gap:24px;}}
  @media (min-width:1024px){.step-track{grid-template-columns:repeat(4,1fr);}}
  .step{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:24px;transition:border-color .2s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease);}
  .step:hover{border-color:rgba(255,74,28,.38);transform:translateY(-4px);box-shadow:var(--sh-md);}
  .step-bar{height:3px;border-radius:2px;background:var(--line);overflow:hidden;margin-bottom:20px;}
  .step-bar i{display:block;height:100%;background:var(--accent);border-radius:2px;}
  .step-tag{display:inline-flex;align-items:center;height:22px;padding:0 9px;border-radius:6px;background:var(--ink);color:var(--invert);font-size:12px;font-weight:600;margin-bottom:12px;}
  .step h3{margin:0 0 10px;font-size:17px;font-weight:700;line-height:1.45;color:var(--ink);}
  .step p{margin:0;font-size:14.5px;line-height:1.8;color:var(--muted);}

  /* ---------- 误区提示 ---------- */
  .note-grid{display:grid;gap:18px;}
  @media (min-width:768px){.note-grid{grid-template-columns:repeat(3,1fr);gap:24px;}}
  .note{background:var(--field-soft);border-radius:var(--r-md);padding:24px;border:1px solid rgba(27,110,90,.14);}
  .note h3{margin:0 0 10px;font-size:17px;font-weight:700;line-height:1.45;color:var(--field);}
  .note p{margin:0;font-size:14.5px;line-height:1.8;color:var(--ink-soft);}

  /* ---------- FAQ ---------- */
  .faq-list{max-width:880px;margin:0 auto;border-bottom:1px solid var(--line);}
  .faq-item{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:600;color:var(--ink);line-height:1.5;transition:color .2s var(--ease);}
  .faq-q:hover{color:var(--accent-deep);}
  .faq-icon{flex:none;width:26px;height:26px;border-radius:var(--r-pill);border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;font-size:15px;line-height:1;color:var(--ink);transition:transform .26s var(--ease),border-color .2s var(--ease);}
  .faq-item.is-open .faq-icon{transform:rotate(45deg);border-color:rgba(255,74,28,.5);}
  .faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .26s var(--ease);}
  .faq-a > div{overflow:hidden;}
  .faq-item.is-open .faq-a{grid-template-rows:1fr;}
  .faq-a p{margin:0 0 22px;max-width:740px;font-size:15px;line-height:1.85;color:var(--muted);}

  /* ---------- 收藏分享 ---------- */
  .share-cta{background:var(--ink);color:var(--invert);border-radius:24px;padding:36px 24px;box-shadow:inset 0 0 0 1px rgba(251,250,247,.14);}
  @media (min-width:768px){.share-cta{display:flex;align-items:center;justify-content:space-between;gap:40px;padding:52px 56px;}}
  .share-cta h2{margin:0 0 10px;font-size:24px;font-weight:800;letter-spacing:-.02em;line-height:1.3;color:var(--invert);}
  @media (min-width:768px){.share-cta h2{font-size:30px;}}
  .share-cta p{margin:0;font-size:15px;line-height:1.8;color:rgba(251,250,247,.72);max-width:520px;}
  .share-actions{display:flex;flex-direction:column;gap:12px;margin-top:26px;}
  @media (min-width:768px){.share-actions{flex-direction:row;flex-wrap:wrap;margin-top:0;flex:none;}}
  .share-btn{display:inline-flex;align-items:center;justify-content:center;height:44px;padding:0 22px;border-radius:var(--r-pill);border:1px solid rgba(251,250,247,.42);color:var(--invert);font-size:14px;font-weight:600;transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);}
  .share-btn:hover{background:var(--invert);color:var(--ink);transform:translateY(-2px);}

  /* ---------- 页脚 ---------- */
  .site-footer{background:var(--ink);color:var(--invert);margin-top:80px;border-top:1px solid rgba(251,250,247,.14);}
  @media (min-width:1024px){.site-footer{margin-top:120px;}}
  .footer-grid{display:grid;gap:34px;padding:56px 0 32px;}
  @media (min-width:768px){.footer-grid{grid-template-columns:1fr 1fr;}}
  @media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:48px;padding:80px 0 48px;}}
  .footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:800;color:var(--invert);margin-bottom:14px;}
  .footer-col p{margin:0;font-size:14.5px;line-height:1.85;color:rgba(251,250,247,.66);max-width:360px;}
  .footer-col h3{margin:0 0 16px;font-size:13px;font-weight:600;letter-spacing:.12em;color:rgba(251,250,247,.56);}
  .footer-col ul{list-style:none;margin:0;padding:0;display:grid;gap:10px;}
  .footer-col ul a{font-size:14.5px;color:rgba(251,250,247,.84);transition:color .2s var(--ease);}
  .footer-col ul a:hover{color:var(--accent);}
  .footer-bottom{display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;align-items:center;padding:22px 0;border-top:1px solid rgba(251,250,247,.14);font-size:13px;color:rgba(251,250,247,.6);}

  @media (prefers-reduced-motion:reduce){
    html{scroll-behavior:auto;}
    .reveal{opacity:1;transform:none;transition:none;}
    *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important;}
  }