/* roulang page: index */
:root{
  --lime:#D8FF3E;
  --lime-deep:#c8ef2e;
  --lime-soft:rgba(216,255,62,.18);
  --coral:#FF5C33;
  --ink:#101214;
  --ink2:#2A2F35;
  --bg:#F7F5F0;
  --card:#FFFFFF;
  --line:rgba(16,18,20,.10);
  --muted:#6B7075;
  --r2:2px;
  --r4:4px;
  --max:1240px;
  --serif:"Noto Serif SC","Songti SC",serif;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --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;
  font-family:var(--sans);
  font-size:17px;
  font-weight:400;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none}
input,select,textarea{font-family:inherit;font-size:15px;color:var(--ink)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
p + p{margin-top:1em}
::selection{background:var(--lime);color:var(--ink)}

/* ---------- container ---------- */
.grid-container{
  max-width:var(--max);
  padding-left:32px;
  padding-right:32px;
  margin-left:auto;
  margin-right:auto;
  width:100%;
}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(247,245,240,.94);
  border-bottom:1px solid var(--line);
  transition:box-shadow .3s var(--ease),background .3s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(247,245,240,.92);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  box-shadow:0 1px 24px rgba(16,18,20,.07);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:72px;
}
.brand{display:flex;flex-direction:column;justify-content:center;line-height:1.15;flex-shrink:0}
.brand-main{font-family:var(--serif);font-weight:700;font-size:19px;letter-spacing:-.01em;color:var(--ink)}
.brand-sub{font-size:10.5px;letter-spacing:.22em;color:var(--muted);margin-top:3px}
.main-nav{flex:1 1 auto;display:flex;justify-content:flex-end}
.main-nav ul{display:flex;align-items:center;gap:26px}
.main-nav a{
  position:relative;
  display:inline-block;
  padding:8px 0;
  font-size:14.5px;
  letter-spacing:.02em;
  color:var(--ink2);
  transition:color .24s var(--ease);
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:0;bottom:4px;
  height:1px;width:0;
  background:var(--ink);
  transition:width .24s var(--ease);
}
.main-nav a:hover{color:var(--ink)}
.main-nav a:hover::after{width:100%}
.main-nav a.active{color:var(--ink);font-weight:500}
.main-nav a.active::after{width:0}
.main-nav a.active::before{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:18px;height:2px;
  background:var(--lime);
}
.header-actions{display:flex;align-items:center;gap:16px;flex-shrink:0}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  position:relative;
  border-radius:var(--r2);
}
.nav-toggle span{
  position:absolute;
  left:11px;
  width:22px;height:1.5px;
  background:var(--ink);
  transition:transform .24s var(--ease),opacity .24s var(--ease);
}
.nav-toggle span:nth-child(1){top:16px}
.nav-toggle span:nth-child(2){top:21px}
.nav-toggle span:nth-child(3){top:26px}
.nav-toggle.is-open span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* ---------- drawer ---------- */
.drawer{
  position:fixed;
  inset:0;
  z-index:70;
  background:rgba(247,245,240,.98);
  backdrop-filter:blur(4px);
  transform:translateX(100%);
  transition:transform .32s var(--ease);
  display:flex;
  flex-direction:column;
  padding:96px 24px 32px;
  visibility:hidden;
}
.drawer.is-open{transform:translateX(0);visibility:visible}
.drawer nav{flex:1 1 auto}
.drawer nav a{
  display:block;
  padding:20px 0;
  font-family:var(--serif);
  font-weight:700;
  font-size:24px;
  letter-spacing:-.01em;
  border-bottom:1px solid var(--line);
}
.drawer nav a.active{color:var(--ink)}
.drawer nav a.active::before{
  content:"";
  display:inline-block;
  width:14px;height:2px;
  background:var(--lime);
  vertical-align:middle;
  margin-right:10px;
}
.drawer-cta{width:100%;margin-top:24px}
.drawer-close{
  position:absolute;
  top:16px;right:20px;
  width:44px;height:44px;
  font-size:24px;
  line-height:1;
  color:var(--ink);
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:52px;
  padding:0 28px;
  border-radius:var(--r2);
  border:1px solid transparent;
  font-size:15px;
  font-weight:500;
  letter-spacing:.02em;
  white-space:nowrap;
  transition:background-color .24s var(--ease),color .24s var(--ease),transform .24s var(--ease),border-color .24s var(--ease);
}
.btn .arw{transition:transform .24s var(--ease)}
.btn:hover .arw{transform:translateX(4px)}
.btn-primary{background:var(--lime);color:var(--ink);border-color:var(--lime)}
.btn-primary:hover{background:var(--lime-deep);border-color:var(--lime-deep)}
.btn-dark{background:var(--ink);color:#fff;border-color:var(--ink)}
.btn-dark:hover{background:var(--ink2);border-color:var(--ink2)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--ink)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-lg{height:56px;padding:0 36px;font-size:16px}
.btn:focus-visible{outline:2px solid var(--lime);outline-offset:2px}
.btn[disabled]{opacity:.4;cursor:not-allowed}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  position:relative;
  padding-bottom:4px;
  font-size:14.5px;
  font-weight:500;
  color:var(--ink);
}
.link-arrow::after{
  content:"";
  position:absolute;left:0;bottom:0;
  width:100%;height:1px;
  background:var(--line);
}
.link-arrow::before{
  content:"";
  position:absolute;left:0;bottom:0;
  width:0;height:1px;z-index:1;
  background:var(--ink);
  transition:width .24s var(--ease);
}
.link-arrow:hover::before{width:100%}
.link-arrow .arw{transition:transform .24s var(--ease)}
.link-arrow:hover .arw{transform:translateX(4px)}

/* ---------- section basics ---------- */
.section{padding:96px 0}
.section--tight{padding:72px 0}
.section--alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:48px;
}
.section-kicker{
  display:inline-block;
  font-size:12px;
  letter-spacing:.16em;
  color:var(--muted);
  margin-bottom:14px;
}
.section-kicker::before{
  content:"";
  display:inline-block;
  width:18px;height:2px;
  background:var(--lime);
  vertical-align:middle;
  margin-right:10px;
}
h2.section-title{
  font-family:var(--serif);
  font-weight:700;
  font-size:clamp(26px,3.4vw,38px);
  line-height:1.12;
  letter-spacing:-.02em;
  color:var(--ink);
}
.section-desc{
  max-width:52ch;
  margin-top:16px;
  font-size:16px;
  color:var(--muted);
  line-height:1.85;
}

/* ---------- hero ---------- */
.hero{
  padding:96px 0 80px;
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.hero-grid{align-items:center}
.hero-copy{padding-right:24px}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:24px;
  padding:0 12px;
  border:1px solid var(--line);
  border-radius:999px;
  font-size:11px;
  letter-spacing:.12em;
  color:var(--muted);
  background:#fff;
}
.hero h1{
  font-family:var(--serif);
  font-weight:700;
  font-size:clamp(34px,5.2vw,64px);
  line-height:1.04;
  letter-spacing:-.02em;
  margin:22px 0 0;
  color:var(--ink);
}
.hero-sub{
  max-width:46ch;
  margin-top:22px;
  font-size:17px;
  line-height:1.85;
  color:var(--muted);
}
.hero-cta{display:flex;align-items:center;gap:24px;flex-wrap:wrap;margin-top:36px}
.hero-stats{
  display:flex;
  gap:56px;
  flex-wrap:wrap;
  margin-top:56px;
  padding-top:28px;
  border-top:1px solid var(--line);
}
.stat-num{
  font-weight:700;
  font-size:32px;
  line-height:1;
  letter-spacing:-.01em;
  font-variant-numeric:tabular-nums;
}
.stat-num em{font-style:normal;font-size:15px;font-weight:500;color:var(--muted);margin-left:2px}
.stat-label{
  margin-top:10px;
  font-size:12px;
  letter-spacing:.12em;
  color:var(--muted);
}
.hero-media{position:relative}
.hero-media img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  border-radius:var(--r4);
}
.hero-badge{
  position:absolute;
  top:18px;right:-12px;
  transform:rotate(-6deg);
  padding:6px 14px;
  border:1px solid var(--ink);
  border-radius:999px;
  background:var(--bg);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--ink);
  white-space:nowrap;
}
.hero-foot{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  margin-top:56px;
  padding-top:20px;
  border-top:1px solid var(--line);
  font-size:12.5px;
  letter-spacing:.1em;
  color:var(--muted);
}

/* ---------- ladder ---------- */
.ladder{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  border:1px solid var(--line);
  background:#fff;
  border-radius:var(--r2);
  overflow:hidden;
}
.ladder-item{
  display:flex;
  flex-direction:column;
  gap:16px;
  padding:36px 28px 32px;
  border-right:1px solid var(--line);
  position:relative;
  transition:background-color .3s var(--ease);
}
.ladder-item:last-child{border-right:0}
.ladder-item:nth-child(1){background:#FFFFFF}
.ladder-item:nth-child(2){background:#FDFDFB}
.ladder-item:nth-child(3){background:#FBFBF5}
.ladder-item:nth-child(4){background:#F8F9EF}
.ladder-item:hover{background:#fff}
.ladder-num{
  font-weight:700;
  font-size:44px;
  line-height:1;
  font-variant-numeric:tabular-nums;
  letter-spacing:-.03em;
  color:rgba(16,18,20,.16);
}
.ladder-name{
  font-family:var(--serif);
  font-weight:700;
  font-size:20px;
  letter-spacing:-.01em;
  color:var(--ink);
}
.ladder-threshold{
  font-size:13px;
  letter-spacing:.08em;
  color:var(--muted);
}
.ladder-list{display:flex;flex-direction:column;gap:10px;margin:4px 0 8px}
.ladder-list li{
  position:relative;
  padding-left:16px;
  font-size:14.5px;
  line-height:1.7;
  color:var(--ink2);
}
.ladder-list li::before{
  content:"";
  position:absolute;
  left:0;top:11px;
  width:5px;height:5px;
  background:var(--lime);
}
.ladder-bar{
  margin-top:auto;
  height:3px;
  background:rgba(16,18,20,.08);
  border-radius:999px;
  overflow:hidden;
}
.ladder-bar i{display:block;height:100%;background:var(--lime)}
.ladder-tag{
  position:absolute;
  top:16px;right:16px;
  height:22px;
  padding:0 10px;
  display:inline-flex;
  align-items:center;
  border:1px solid var(--ink);
  border-radius:999px;
  font-size:11px;
  letter-spacing:.08em;
  background:var(--lime);
  color:var(--ink);
}

/* ---------- compare ---------- */
.compare-wrap{
  position:relative;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r2);
  overflow:hidden;
}
.compare-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
table.compare{
  width:100%;
  min-width:880px;
  border-collapse:collapse;
  background:#fff;
}
.compare th,
.compare td{
  height:56px;
  padding:0 18px;
  border-bottom:1px solid var(--line);
  text-align:center;
  font-size:15px;
  font-weight:400;
  color:var(--ink2);
  background:#fff;
}
.compare thead th{height:66px;font-weight:500;color:var(--ink);font-size:15px}
.compare th:first-child,
.compare td:first-child{
  position:sticky;
  left:0;
  z-index:3;
  text-align:left;
  padding-left:24px;
  font-weight:500;
  color:var(--muted);
  background:#fff;
  box-shadow:1px 0 0 var(--line);
}
.compare thead th:first-child{color:var(--ink)}
.compare .col-rec{background:rgba(216,255,62,.10)}
.compare thead th.col-rec{position:relative;font-weight:700;color:var(--ink)}
.compare thead th.col-rec::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:4px;
  background:var(--lime);
}
.compare tbody tr:last-child td{border-bottom:0}
.compare-hint{
  margin-top:14px;
  font-size:12.5px;
  letter-spacing:.08em;
  color:var(--muted);
  text-align:right;
}
.compare-cta{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
  padding:24px 24px;
  border-top:1px solid var(--line);
  background:#FCFCF8;
}
.compare-cta p{font-size:15px;color:var(--muted)}

/* ---------- countdown ---------- */
.countdown-section{
  background:var(--ink);
  color:#fff;
  padding:96px 0;
  border-top:1px solid rgba(216,255,62,.08);
}
.cd-inner{
  max-width:760px;
  margin:0 auto;
  text-align:center;
}
.cd-eyebrow{
  display:inline-block;
  font-size:12px;
  letter-spacing:.18em;
  color:rgba(216,255,62,.85);
  margin-bottom:18px;
}
.cd-title{
  font-family:var(--serif);
  font-weight:700;
  font-size:clamp(24px,3.2vw,34px);
  line-height:1.2;
  letter-spacing:-.02em;
  color:#fff;
}
.countdown{
  display:flex;
  align-items:baseline;
  justify-content:center;
  gap:6px;
  margin:44px 0 12px;
  font-weight:700;
  font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
  font-size:clamp(40px,7vw,72px);
  line-height:1;
}
.cd-num{color:#fff}
.cd-unit{
  font-size:13px;
  font-weight:400;
  letter-spacing:.12em;
  color:rgba(255,255,255,.5);
  margin-left:2px;
}
.cd-colon{
  color:var(--lime);
  animation:cdPulse 1.6s ease-in-out infinite;
}
@keyframes cdPulse{0%,100%{opacity:1}50%{opacity:.25}}
.cd-rules{
  display:flex;
  justify-content:center;
  gap:32px;
  flex-wrap:wrap;
  margin:32px 0 40px;
  font-size:13.5px;
  color:rgba(255,255,255,.55);
}
.cd-rules li{position:relative}
.cd-rules li + li::before{
  content:"";
  position:absolute;
  left:-17px;top:50%;
  width:3px;height:3px;
  border-radius:50%;
  background:rgba(255,255,255,.3);
  transform:translateY(-50%);
}

/* ---------- cards ---------- */
.card-grid{margin-bottom:-32px}
.card-cell{margin-bottom:32px;display:flex}
.post-card{
  display:flex;
  flex-direction:column;
  width:100%;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r2);
  overflow:hidden;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.post-card:hover{
  transform:translateY(-2px);
  border-color:rgba(16,18,20,.16);
  box-shadow:0 12px 32px rgba(16,18,20,.06);
}
.post-thumb{display:block;overflow:hidden;background:rgba(16,18,20,.04)}
.post-thumb img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  transition:transform .4s var(--ease);
}
.post-card:hover .post-thumb img{transform:scale(1.02)}
.post-body{
  display:flex;
  flex-direction:column;
  gap:12px;
  padding:24px 24px 20px;
  flex:1 1 auto;
}
.tag{
  display:inline-flex;
  align-items:center;
  align-self:flex-start;
  height:22px;
  padding:0 10px;
  border-radius:999px;
  background:var(--lime-soft);
  color:var(--ink2);
  font-size:11px;
  letter-spacing:.08em;
}
.post-body h3{
  font-size:18px;
  font-weight:500;
  line-height:1.5;
  color:var(--ink);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.post-body h3 a{transition:color .2s var(--ease)}
.post-body h3 a:hover{color:var(--ink2)}
.post-body p{
  font-size:14.5px;
  line-height:1.8;
  color:var(--muted);
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.post-foot{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  margin-top:auto;
  padding-top:16px;
  border-top:1px solid var(--line);
}
.post-foot time{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.empty-state{
  width:100%;
  border:1px dashed rgba(16,18,20,.18);
  border-radius:var(--r2);
  padding:48px 24px;
  text-align:center;
  font-size:15px;
  color:var(--muted);
  background:#fff;
}
.empty-state a{
  margin-left:8px;
  border-bottom:1px solid var(--line);
  padding-bottom:2px;
  transition:border-color .2s var(--ease);
}
.empty-state a:hover{border-color:var(--ink)}

/* ---------- faq ---------- */
.faq .accordion{
  background:transparent;
  border:0;
  margin:0;
  border-top:1px solid var(--line);
}
.faq .accordion-item{
  background:transparent;
  border-bottom:1px solid var(--line);
}
.faq .accordion-title{
  background:transparent;
  border:0;
  padding:26px 48px 26px 0;
  font-size:17px;
  font-weight:500;
  line-height:1.5;
  color:var(--ink);
  position:relative;
  transition:color .2s var(--ease);
}
.faq .accordion-title:hover{color:var(--ink2)}
.faq .accordion-title::before{
  content:"";
  position:absolute;
  right:14px;top:50%;
  width:12px;height:1.5px;
  background:var(--ink);
  transform:translateY(-50%);
  transition:transform .24s var(--ease);
}
.faq .accordion-title::after{
  content:"";
  position:absolute;
  right:19.5px;top:50%;
  width:1.5px;height:12px;
  background:var(--ink);
  transform:translateY(-50%);
  transition:transform .24s var(--ease),opacity .24s var(--ease);
}
.faq .accordion-item.is-active .accordion-title::after{transform:translateY(-50%) rotate(90deg);opacity:0}
.faq .accordion-content{
  background:transparent;
  border:0;
  padding:0 60px 26px 0;
  font-size:15px;
  line-height:1.85;
  color:var(--muted);
}
.faq .accordion-content p{margin:0}

/* ---------- contact ---------- */
.contact-left{display:flex;flex-direction:column;gap:24px}
.contact-points li{
  display:flex;
  gap:14px;
  padding:16px 0;
  border-bottom:1px solid var(--line);
  font-size:15px;
  color:var(--ink2);
}
.contact-points li:first-child{border-top:1px solid var(--line)}
.contact-points .pt-num{
  font-weight:700;
  font-size:13px;
  letter-spacing:.1em;
  color:var(--muted);
  font-variant-numeric:tabular-nums;
  padding-top:3px;
}
.form-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r2);
  padding:36px 32px;
}
.form-field{margin-bottom:22px}
.form-field label{
  display:block;
  font-size:12px;
  letter-spacing:.1em;
  color:var(--muted);
  margin-bottom:10px;
}
.form-field input,
.form-field select,
.form-field textarea{
  width:100%;
  height:48px;
  padding:0 14px;
  border:1px solid var(--line);
  border-radius:var(--r2);
  background:#fff;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
  appearance:none;
}
.form-field textarea{height:120px;padding:12px 14px;line-height:1.7;resize:vertical}
.form-field select{
  background-image:linear-gradient(45deg,transparent 50%,var(--ink) 50%),linear-gradient(135deg,var(--ink) 50%,transparent 50%);
  background-position:calc(100% - 20px) 21px,calc(100% - 15px) 21px;
  background-size:5px 5px,5px 5px;
  background-repeat:no-repeat;
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus{
  outline:none;
  border-color:var(--ink);
  box-shadow:0 2px 0 0 var(--lime);
}
.form-field.has-error input,
.form-field.has-error textarea{border-color:var(--coral);border-left-width:2px}
.field-error{
  display:none;
  margin-top:8px;
  font-size:13px;
  color:var(--coral);
}
.form-field.has-error .field-error{display:block}
.form-consent{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:13px;
  line-height:1.7;
  color:var(--muted);
  margin:6px 0 24px;
}
.form-consent input{width:16px;height:16px;margin-top:3px;flex-shrink:0;accent-color:#101214}
.form-success{
  display:none;
  align-items:center;
  gap:12px;
  padding:16px 18px;
  border:1px solid var(--line);
  border-left:2px solid var(--lime);
  background:#FCFCF8;
  border-radius:var(--r2);
  font-size:14.5px;
  color:var(--ink2);
  margin-bottom:22px;
}
.form-success.is-shown{display:flex}

/* ---------- footer ---------- */
.site-footer{
  background:var(--ink);
  color:rgba(255,255,255,.68);
  padding:72px 0 0;
}
.footer-grid{row-gap:40px}
.footer-brand-main{
  font-family:var(--serif);
  font-weight:700;
  font-size:22px;
  line-height:1.2;
  letter-spacing:-.01em;
  color:#fff;
}
.footer-brand-sub{
  display:block;
  margin-top:6px;
  font-size:11px;
  letter-spacing:.22em;
  color:rgba(255,255,255,.4);
}
.footer-note{
  margin-top:18px;
  max-width:34ch;
  font-size:14px;
  line-height:1.85;
  color:rgba(255,255,255,.5);
}
.footer-col h4{
  font-size:12px;
  font-weight:500;
  letter-spacing:.14em;
  color:rgba(255,255,255,.42);
  margin-bottom:18px;
}
.footer-col a{
  display:block;
  padding:6px 0;
  font-size:14.5px;
  color:rgba(255,255,255,.7);
  transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.footer-col a:hover{color:var(--lime);padding-left:4px}
.footer-col p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.55);margin-bottom:10px}
.footer-bottom{
  margin-top:56px;
  border-top:1px solid rgba(255,255,255,.10);
  padding:24px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:rgba(255,255,255,.42);
}
.footer-bottom a{border-bottom:1px solid rgba(255,255,255,.18);transition:color .2s var(--ease)}
.footer-bottom a:hover{color:var(--lime)}

/* ---------- reveal ---------- */
.reveal-up{
  opacity:0;
  transform:translateY(8px);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
}
.reveal-up.is-in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media screen and (max-width:1279px){
  .main-nav ul{gap:20px}
}
@media screen and (max-width:1023px){
  .grid-container{padding-left:24px;padding-right:24px}
  .main-nav{display:none}
  .nav-toggle{display:block}
  .header-inner{height:64px}
  .header-actions .btn{display:none}
  .section{padding:64px 0}
  .hero{padding:64px 0 56px}
  .hero-copy{padding-right:0}
  .hero-media{margin-top:40px}
  .hero-badge{right:8px}
  .hero-stats{gap:40px;margin-top:44px}
  .hero-foot{margin-top:40px}
  .ladder{grid-template-columns:repeat(2,1fr)}
  .ladder-item:nth-child(2){border-right:0}
  .ladder-item:nth-child(1),
  .ladder-item:nth-child(2){border-bottom:1px solid var(--line)}
  .countdown-section{padding:64px 0}
  .cd-rules{gap:24px}
  .compare-cta{padding:20px}
  .contact-left{margin-bottom:40px}
  .site-footer{padding-top:56px}
}
@media screen and (max-width:767px){
  body{font-size:16px}
  .grid-container{padding-left:20px;padding-right:20px}
  .section{padding:48px 0}
  .section--tight{padding:44px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:32px}
  .hero{padding:48px 0 44px}
  .hero h1{font-size:clamp(30px,8.4vw,44px)}
  .hero-cta{gap:16px;margin-top:28px}
  .hero-cta .btn{width:100%}
  .hero-cta .link-arrow{padding:12px 0}
  .hero-stats{gap:0;flex-wrap:wrap;margin-top:36px}
  .hero-stats > div{width:50%;padding:12px 0}
  .stat-num{font-size:26px}
  .stat-label{font-size:11px}
  .hero-foot{flex-direction:column;align-items:flex-start;gap:8px}
  .ladder{grid-template-columns:1fr}
  .ladder-item{border-right:0;border-bottom:1px solid var(--line);padding:28px 22px}
  .ladder-item:last-child{border-bottom:0}
  .ladder-num{font-size:36px}
  .countdown-section{padding:48px 0}
  .countdown{gap:4px;margin:32px 0 8px}
  .cd-rules{flex-direction:column;gap:10px;margin:24px 0 32px}
  .cd-rules li + li::before{display:none}
  .compare-cta{flex-direction:column;align-items:flex-start}
  .compare-cta .btn{width:100%}
  .compare-hint{text-align:left}
  .compare th:first-child,
  .compare td:first-child{padding-left:16px;min-width:110px}
  .form-card{padding:26px 20px}
  .faq .accordion-title{padding:22px 44px 22px 0}
  .faq .accordion-content{padding:0 24px 22px 0}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px;margin-top:40px}
}
@media screen and (max-width:520px){
  .hero-stats > div{width:100%}
  .drawer nav a{font-size:20px;padding:16px 0}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .reveal-up{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --lime:#D8FF3E;
  --coral:#FF5C33;
  --ink:#101214;
  --ink-2:#2A2F35;
  --ivory:#F7F5F0;
  --white:#FFFFFF;
  --line:rgba(16,18,20,.10);
  --muted:#6B7075;
  --r2:2px;
  --r4:4px;
  --serif:"Noto Serif SC","Songti SC",serif;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow:0 12px 32px rgba(16,18,20,.06);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--ivory);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  font-weight:400;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;transition:color .24s var(--ease);}
a:hover{color:var(--ink);}
ul,ol{list-style:none;margin:0;padding:0;}
button{font-family:inherit;cursor:pointer;border:none;background:none;}
input,textarea,select{font-family:inherit;font-size:15px;}
h1,h2,h3,h4,h5{margin:0;font-weight:700;}
p{margin:0;}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;}
::selection{background:var(--lime);color:var(--ink);}

.grid-container{max-width:1240px;padding-left:32px;padding-right:32px;}
.grid-x>.cell{padding-left:12px;padding-right:12px;}
.grid-margin-x{margin-left:-12px;margin-right:-12px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,245,240,.96);
  border-bottom:1px solid var(--line);
  transition:background .28s var(--ease),box-shadow .28s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(247,245,240,.92);
  backdrop-filter:blur(8px);
  box-shadow:0 1px 0 rgba(16,18,20,.06);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px;}
.brand{display:flex;flex-direction:column;line-height:1.05;letter-spacing:-.01em;}
.brand-main{font-family:var(--serif);font-size:19px;font-weight:700;color:var(--ink);}
.brand-sub{font-size:11px;letter-spacing:.24em;color:var(--muted);margin-top:3px;}
.main-nav ul{display:flex;align-items:center;gap:30px;}
.main-nav a{
  position:relative;font-size:14.5px;letter-spacing:.02em;color:var(--ink-2);
  padding:6px 0;display:inline-block;
}
.main-nav a::after{
  content:"";position:absolute;left:0;bottom:0;width:100%;height:1px;
  background:var(--ink);transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease);
}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a.active{color:var(--ink);font-weight:500;}
.main-nav a.active::after{width:18px;height:2px;background:var(--lime);transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:16px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:50px;padding:0 26px;border-radius:var(--r2);
  font-size:15px;font-weight:500;letter-spacing:.02em;
  transition:background .24s var(--ease),color .24s var(--ease),transform .24s var(--ease),border-color .24s var(--ease);
}
.btn i{transition:transform .24s var(--ease);}
.btn:hover i{transform:translateX(4px);}
.btn-lime{background:var(--lime);color:var(--ink);}
.btn-lime:hover{background:#cbf22f;color:var(--ink);}
.btn-ink{background:var(--ink);color:#fff;}
.btn-ink:hover{background:var(--ink-2);color:#fff;}
.btn-ghost{border:1px solid rgba(16,18,20,.22);color:var(--ink);}
.btn-ghost:hover{border-color:var(--ink);background:rgba(16,18,20,.03);}
.btn-sm{height:42px;padding:0 20px;font-size:14px;}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:500;color:var(--ink);}
.link-arrow::after{content:"";display:block;width:22px;height:1px;background:var(--ink);transition:width .24s var(--ease);}
.link-arrow:hover::after{width:34px;}
.nav-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:22px;height:1.5px;background:var(--ink);transition:transform .24s var(--ease),opacity .24s var(--ease);}
.nav-toggle.is-active span:nth-child(1){transform:translateY(6.5px) rotate(45deg);}
.nav-toggle.is-active span:nth-child(2){opacity:0;}
.nav-toggle.is-active span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg);}

/* 移动抽屉 */
.mobile-drawer{
  position:fixed;top:0;right:0;width:min(86vw,380px);height:100%;
  background:var(--white);border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform .32s var(--ease);
  z-index:90;padding:28px 26px 34px;display:flex;flex-direction:column;overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateX(0);}
.mobile-drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:20px;border-bottom:1px solid var(--line);}
.drawer-close{width:44px;height:44px;display:flex;align-items:center;justify-content:center;font-size:20px;color:var(--muted);}
.mobile-drawer nav{margin-top:12px;}
.mobile-drawer nav a{
  display:block;padding:16px 0;border-bottom:1px solid var(--line);
  font-family:var(--serif);font-size:20px;font-weight:700;color:var(--ink);
}
.mobile-drawer nav a.active{color:var(--ink);}
.mobile-drawer nav a.active::before{content:"";display:inline-block;width:8px;height:8px;background:var(--lime);border-radius:50%;margin-right:10px;vertical-align:middle;}
.drawer-cta{margin-top:auto;padding-top:26px;}
.drawer-cta .btn{width:100%;}
.drawer-mask{
  position:fixed;inset:0;background:rgba(16,18,20,.42);opacity:0;visibility:hidden;
  transition:opacity .3s var(--ease),visibility .3s var(--ease);z-index:80;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}

/* ---------- 面包屑 ---------- */
.crumb-wrap{border-bottom:1px solid var(--line);background:var(--white);}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:10px;padding:18px 0;font-size:13px;color:var(--muted);}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--ink);}
.crumb .sep{color:rgba(16,18,20,.28);}
.crumb .now{color:var(--ink);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ---------- 文章头 ---------- */
.article-hero{background:var(--white);border-bottom:1px solid var(--line);padding:64px 0 0;}
.article-head{max-width:820px;}
.chip{
  display:inline-flex;align-items:center;height:24px;padding:0 12px;border-radius:999px;
  background:rgba(216,255,62,.42);color:var(--ink);font-size:11px;letter-spacing:.08em;
}
.article-title{
  font-family:var(--serif);font-weight:700;letter-spacing:-.02em;line-height:1.16;
  font-size:clamp(28px,4.4vw,48px);margin:20px 0 22px;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--muted);letter-spacing:.02em;}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:rgba(16,18,20,.2);}
.article-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 12px;border-radius:999px;
  border:1px solid var(--line);color:var(--muted);font-size:11px;letter-spacing:.08em;
  transition:border-color .24s var(--ease),color .24s var(--ease);
}
.tag:hover{border-color:var(--ink);color:var(--ink);}
.article-cover{
  margin:42px 0 0;border-top:1px solid var(--line);padding-top:42px;
}
.article-cover img{
  width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r4);
  background:#E9E6DF;
}

/* ---------- 阅读布局 ---------- */
.article-main-wrap{padding:72px 0 88px;}
.article-layout{display:flex;flex-wrap:wrap;}
.article-main{max-width:800px;}
.article-body{font-size:17.5px;line-height:1.9;color:#22262A;max-width:760px;}
.article-body p{margin:0 0 1em;}
.article-body h2{
  position:relative;font-family:var(--serif);font-size:28px;font-weight:700;
  letter-spacing:-.01em;line-height:1.34;margin:2em 0 .8em;padding-left:16px;
}
.article-body h2::before{content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:3px;background:var(--lime);}
.article-body h3{font-family:var(--serif);font-size:21px;font-weight:700;line-height:1.45;margin:1.7em 0 .6em;}
.article-body h4{font-size:17px;font-weight:700;margin:1.4em 0 .5em;}
.article-body ul,.article-body ol{margin:0 0 1.2em;}
.article-body li{position:relative;padding-left:22px;margin-bottom:.5em;}
.article-body li::before{content:"";position:absolute;left:2px;top:.75em;width:8px;height:8px;background:var(--lime);}
.article-body ol{counter-reset:olc;}
.article-body ol li{counter-increment:olc;}
.article-body ol li::before{content:counter(olc);top:0;left:0;width:auto;height:auto;background:none;font-weight:700;font-size:15px;color:var(--ink-2);}
.article-body blockquote{
  margin:1.5em 0;padding:6px 0 6px 20px;border-left:3px solid var(--lime);
  color:var(--muted);font-size:16px;
}
.article-body img{max-width:100%;height:auto;border-radius:var(--r4);margin:1.4em 0;background:#E9E6DF;}
.article-body figure{margin:1.4em 0;}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:8px;}
.article-body table{width:100%;border-collapse:collapse;margin:1.5em 0;font-size:15px;}
.article-body th,.article-body td{border-bottom:1px solid var(--line);padding:14px 16px;text-align:left;}
.article-body th{background:#F2F0EA;font-weight:500;color:var(--ink-2);}
.article-body a{color:var(--ink);border-bottom:1px solid var(--lime);}
.article-body a:hover{background:rgba(216,255,62,.35);}
.article-body code{background:#F2F0EA;padding:2px 6px;border-radius:var(--r2);font-size:15px;}
.article-body pre{background:#F2F0EA;border:1px solid var(--line);border-radius:var(--r4);padding:18px;overflow-x:auto;font-size:14px;line-height:1.7;}
.article-body pre code{background:none;padding:0;}
.article-empty{
  border:1px dashed rgba(16,18,20,.24);border-radius:var(--r4);
  padding:56px 32px;text-align:center;background:var(--white);
}
.article-empty h2{font-family:var(--serif);font-size:24px;margin-bottom:12px;padding:0;}
.article-empty h2::before{display:none;}
.article-empty p{color:var(--muted);font-size:15px;margin-bottom:22px;}

/* ---------- 侧栏 ---------- */
.article-side{padding-top:6px;}
.side-panel{
  position:sticky;top:104px;border-left:1px solid var(--line);padding-left:26px;
}
.side-title{font-size:12px;letter-spacing:.14em;color:var(--muted);margin-bottom:16px;}
.side-toc a{
  display:block;padding:10px 0;font-size:14.5px;color:var(--ink-2);
  border-bottom:1px solid var(--line);line-height:1.5;
}
.side-toc a:hover{color:var(--ink);padding-left:4px;}
.side-card{
  margin-top:32px;background:var(--ink);color:#fff;border-radius:var(--r4);padding:26px 22px;
}
.side-card h3{font-family:var(--serif);font-size:18px;color:#fff;margin-bottom:12px;line-height:1.45;}
.side-card p{font-size:13.5px;color:rgba(255,255,255,.72);line-height:1.8;margin-bottom:18px;}
.side-card .btn{width:100%;height:46px;}

/* ---------- 文末区块 ---------- */
.after-body{margin-top:56px;padding-top:40px;border-top:1px solid var(--line);}
.after-label{font-size:12px;letter-spacing:.14em;color:var(--muted);margin-bottom:18px;}
.after-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:44px;}
.reco-grid{display:flex;flex-wrap:wrap;margin:0 -12px;}
.reco-card{
  display:flex;flex-direction:column;background:var(--white);border:1px solid var(--line);
  border-radius:var(--r4);overflow:hidden;height:100%;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.reco-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);}
.reco-thumb{overflow:hidden;background:#E9E6DF;}
.reco-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .4s var(--ease);}
.reco-card:hover .reco-thumb img{transform:scale(1.02);}
.reco-body{padding:20px 20px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.reco-body h3{font-family:var(--serif);font-size:17px;line-height:1.5;font-weight:700;}
.reco-body p{font-size:14px;color:var(--muted);line-height:1.8;flex:1;}
.reco-body .link-arrow{font-size:13.5px;}
.reco-empty{
  border:1px dashed rgba(16,18,20,.24);border-radius:var(--r4);
  padding:48px 24px;text-align:center;color:var(--muted);font-size:15px;
}
.reco-empty .link-arrow{margin-top:12px;}

/* ---------- FAQ ---------- */
.faq-block{padding:76px 0;background:var(--white);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{margin-bottom:36px;}
.section-head h2{font-family:var(--serif);font-size:clamp(26px,3.4vw,38px);letter-spacing:-.02em;line-height:1.24;}
.section-head p{color:var(--muted);font-size:15.5px;margin-top:12px;max-width:60ch;}
.accordion{background:transparent;border:none;margin:0;}
.accordion .accordion-item{background:transparent;border:none;border-bottom:1px solid var(--line);}
.accordion .accordion-item:first-child{border-top:1px solid var(--line);}
.accordion .accordion-title{
  background:transparent;border:none;color:var(--ink);
  font-size:17px;font-weight:700;line-height:1.6;padding:22px 52px 22px 0;
  transition:color .24s var(--ease);
}
.accordion .accordion-title:hover,.accordion .accordion-title:focus{background:transparent;color:var(--ink);}
.accordion .accordion-title::before{
  content:"+";position:absolute;right:0;top:50%;transform:translateY(-50%);
  font-size:22px;font-weight:400;color:var(--muted);transition:color .24s var(--ease);
}
.accordion .accordion-item.is-active>.accordion-title::before{content:"−";color:var(--ink);}
.accordion .accordion-content{
  background:transparent;border:none;color:var(--muted);
  font-size:15px;line-height:1.85;padding:0 52px 24px 0;
}
.accordion .accordion-content p{margin:0 0 .6em;}
.accordion .accordion-content p:last-child{margin-bottom:0;}

/* ---------- CTA ---------- */
.cta-band{background:var(--ink);color:#fff;border-top:1px solid rgba(216,255,62,.22);padding:76px 0;}
.cta-band .inner{max-width:760px;margin:0 auto;text-align:center;}
.cta-band h2{font-family:var(--serif);font-size:clamp(26px,3.6vw,40px);letter-spacing:-.02em;line-height:1.24;margin-bottom:16px;}
.cta-band p{color:rgba(255,255,255,.7);font-size:15.5px;line-height:1.85;margin-bottom:28px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:16px;justify-content:center;}
.cta-note{display:flex;flex-wrap:wrap;gap:10px 26px;justify-content:center;margin-top:26px;font-size:12.5px;color:rgba(255,255,255,.5);letter-spacing:.04em;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:76px 0 0;border-top:1px solid rgba(255,255,255,.08);}
.footer-grid{padding-bottom:52px;row-gap:36px;}
.footer-brand-main{font-family:var(--serif);font-size:20px;font-weight:700;color:#fff;letter-spacing:-.01em;}
.footer-brand-sub{display:inline-block;font-size:11px;letter-spacing:.24em;color:var(--lime);margin-top:6px;}
.footer-note{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.55);margin-top:18px;max-width:34ch;}
.footer-col h4{font-size:12px;letter-spacing:.14em;color:#fff;font-weight:500;margin-bottom:16px;}
.footer-col a{display:block;font-size:14px;color:rgba(255,255,255,.68);padding:7px 0;transition:color .24s var(--ease);}
.footer-col a:hover{color:var(--lime);}
.footer-col p{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.55);margin-bottom:10px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding:22px 0 30px;
  display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between;
  font-size:12.5px;color:rgba(255,255,255,.45);letter-spacing:.03em;
}
.footer-bottom a{color:rgba(255,255,255,.6);}
.footer-bottom a:hover{color:var(--lime);}

/* ---------- 动效 ---------- */
.fade-up{opacity:0;transform:translateY(8px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.fade-up.is-visible{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .grid-container{max-width:1140px;}
}
@media (max-width:1023px){
  .grid-container{padding-left:24px;padding-right:24px;}
  .main-nav{display:none;}
  .nav-toggle{display:flex;}
  .header-inner{height:64px;}
  .header-actions .btn{display:none;}
  .article-side{display:none;}
  .article-main{max-width:100%;}
  .article-hero{padding-top:48px;}
  .article-main-wrap{padding:52px 0 64px;}
  .article-cover{margin-top:32px;padding-top:32px;}
  .faq-block{padding:56px 0;}
  .cta-band{padding:60px 0;}
  .site-footer{padding-top:60px;}
}
@media (max-width:639px){
  body{font-size:16px;}
  .grid-container{padding-left:20px;padding-right:20px;}
  .article-title{font-size:clamp(24px,7vw,32px);}
  .article-body{font-size:16.5px;line-height:1.88;}
  .article-body h2{font-size:23px;}
  .article-body h3{font-size:19px;}
  .crumb{font-size:12px;gap:8px;}
  .crumb .now{max-width:32ch;}
  .cta-actions .btn{width:100%;}
  .footer-bottom{flex-direction:column;}
  .accordion .accordion-title{font-size:16px;padding-right:42px;}
  .accordion .accordion-content{padding-right:0;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  .fade-up{opacity:1;transform:none;}
}

/* roulang page: category1 */
/* ===================== 设计变量 ===================== */
:root{
  --lime:#D8FF3E;
  --lime-deep:#C9F22C;
  --lime-soft:rgba(216,255,62,.20);
  --lime-line:rgba(216,255,62,.30);
  --coral:#FF5C33;
  --ink:#101214;
  --ink-2:#2A2F35;
  --bg:#F7F5F0;
  --card:#FFFFFF;
  --soft:#EFEDE7;
  --line:rgba(16,18,20,.10);
  --line-strong:rgba(16,18,20,.20);
  --muted:#6B7075;
  --r-xs:2px;
  --r-sm:4px;
  --shadow:0 12px 32px rgba(16,18,20,.06);
  --ease:cubic-bezier(.22,.61,.36,1);
  --nav-h:72px;
}

/* ===================== 基础 reset ===================== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:17px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;height:auto;display:block;border:0;}
a{color:inherit;text-decoration:none;background-color:transparent;}
a:focus-visible,button:focus-visible{outline:2px solid var(--lime);outline-offset:2px;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,h5{margin:0;font-family:"Noto Serif SC","Songti SC",serif;font-weight:700;letter-spacing:-.02em;color:var(--ink);}
h2{font-size:clamp(26px,3.4vw,38px);line-height:1.14;}
h3{font-size:19px;line-height:1.45;letter-spacing:-.01em;}
p{margin:0;}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input,textarea,select{font-family:inherit;font-size:16px;color:inherit;}
figure{margin:0;}
::selection{background:var(--lime);color:var(--ink);}
.muted{color:var(--muted);}
.tabular{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}

/* ===================== 容器与栅格 ===================== */
.grid-container{
  width:100%;
  max-width:1240px;
  margin-left:auto;
  margin-right:auto;
  padding-left:20px;
  padding-right:20px;
}
@media screen and (min-width:640px){
  .grid-container{padding-left:24px;padding-right:24px;}
}
@media screen and (min-width:1024px){
  .grid-container{max-width:1240px;padding-left:32px;padding-right:32px;}
}
@media screen and (min-width:1280px){
  .grid-container{max-width:1240px;}
}
.grid-x{display:flex;flex-flow:row wrap;}
.section{padding:48px 0;}
@media screen and (min-width:640px){.section{padding:64px 0;}}
@media screen and (min-width:1024px){.section{padding:96px 0;}}
.section-alt{background:var(--card);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}

/* ===================== 顶部导航 ===================== */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(247,245,240,.96);
  border-bottom:1px solid var(--line);
  transition:background-color .24s var(--ease),box-shadow .24s var(--ease),backdrop-filter .24s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(247,245,240,.92);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  box-shadow:0 1px 18px rgba(16,18,20,.05);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:64px;
}
@media screen and (min-width:1024px){
  .header-inner{height:var(--nav-h);}
}
.brand{display:flex;flex-direction:column;justify-content:center;line-height:1.05;padding:4px 0;}
.brand-main{
  font-family:"Noto Serif SC",serif;
  font-size:19px;
  font-weight:700;
  letter-spacing:-.02em;
  color:var(--ink);
}
.brand-sub{
  font-size:11px;
  letter-spacing:.18em;
  color:var(--muted);
  margin-top:3px;
}
.main-nav{display:none;}
@media screen and (min-width:1024px){
  .main-nav{display:block;flex:1 1 auto;}
}
.main-nav ul{display:flex;align-items:center;justify-content:center;gap:34px;}
.main-nav a{
  position:relative;
  display:inline-block;
  font-size:15px;
  letter-spacing:.02em;
  color:var(--ink-2);
  padding:6px 0;
  transition:color .24s var(--ease);
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:100%;
  height:1px;
  background:var(--ink);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .24s var(--ease),background-color .24s var(--ease);
}
.main-nav a:hover{color:var(--ink);}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a.active{color:var(--ink);font-weight:500;}
.main-nav a.active::after{
  transform:scaleX(1);
  width:18px;
  height:2px;
  background:var(--lime);
}
.nav-cta{display:none;}
@media screen and (min-width:1024px){
  .nav-cta{display:inline-flex;height:44px;padding:0 22px;font-size:14px;}
}
.menu-toggle{
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:44px;
  height:44px;
  padding:0 10px;
  border:1px solid var(--line);
  border-radius:var(--r-xs);
}
.menu-toggle span{display:block;height:1px;width:100%;background:var(--ink);}
@media screen and (min-width:1024px){
  .menu-toggle{display:none;}
}

/* 移动端抽屉 */
.off-canvas.position-right{background:var(--ink);color:#fff;}
.drawer-inner{padding:28px 24px 96px;display:flex;flex-direction:column;min-height:100%;}
.drawer-close{
  align-self:flex-end;
  width:44px;height:44px;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:24px;line-height:1;color:#fff;
  border:1px solid rgba(255,255,255,.18);
  border-radius:var(--r-xs);
  margin-bottom:26px;
}
.drawer-brand{display:flex;flex-direction:column;line-height:1.08;margin-bottom:34px;}
.drawer-brand .brand-main{color:#fff;font-size:24px;font-family:"Noto Serif SC",serif;}
.drawer-brand .brand-sub{color:rgba(255,255,255,.55);font-size:11px;letter-spacing:.2em;margin-top:6px;}
.drawer-nav{display:flex;flex-direction:column;}
.drawer-nav a{
  font-family:"Noto Serif SC",serif;
  font-size:22px;
  font-weight:700;
  color:#fff;
  padding:16px 0;
  border-bottom:1px solid rgba(255,255,255,.10);
  transition:color .24s var(--ease),padding-left .24s var(--ease);
}
.drawer-nav a:hover,.drawer-nav a.active{color:var(--lime);padding-left:6px;}
.drawer-cta{margin-top:30px;width:100%;}

/* ===================== 按钮体系 ===================== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:48px;
  height:52px;
  padding:0 28px;
  border:1px solid transparent;
  border-radius:var(--r-xs);
  font-size:15px;
  font-weight:500;
  letter-spacing:.02em;
  cursor:pointer;
  transition:background-color .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),transform .24s var(--ease);
}
.btn-primary{background:var(--lime);color:var(--ink);border-color:var(--lime);}
.btn-primary:hover{background:var(--lime-deep);border-color:var(--lime-deep);}
.btn-dark{background:var(--ink);color:#fff;border-color:var(--ink);}
.btn-dark:hover{background:var(--ink-2);border-color:var(--ink-2);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-strong);}
.btn-ghost:hover{border-color:var(--ink);}
.btn-ghost-light{color:#fff;border-color:rgba(255,255,255,.28);}
.btn-ghost-light:hover{border-color:#fff;}
.btn-sm{height:44px;padding:0 20px;font-size:14px;}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none;}

.link-arrow{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:15px;
  font-weight:500;
  color:var(--ink);
  padding-bottom:4px;
  transition:color .24s var(--ease);
}
.link-arrow::before{content:"→";transition:transform .24s var(--ease);}
.link-arrow::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:100%;height:1px;
  background:var(--line-strong);
  transform:scaleX(1);
  transform-origin:left center;
  transition:background-color .24s var(--ease);
}
.link-arrow:hover::after{background:var(--ink);}
.link-arrow:hover::before{transform:translateX(4px);}

/* ===================== 标签与徽章 ===================== */
.eyebrow{
  display:inline-block;
  position:relative;
  padding-left:34px;
  margin-bottom:16px;
  font-size:12px;
  font-weight:500;
  letter-spacing:.16em;
  color:var(--muted);
}
.eyebrow::before{
  content:"";
  position:absolute;
  left:0;top:50%;
  width:24px;height:2px;
  background:var(--lime);
  transform:translateY(-50%);
}
.eyebrow-light{color:rgba(255,255,255,.55);}
.badge{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 12px;
  border-radius:999px;
  font-size:11px;
  letter-spacing:.08em;
  background:var(--lime-soft);
  color:var(--ink);
  border:1px solid var(--lime-line);
}
.badge-dark{background:rgba(16,18,20,.06);border-color:var(--line);color:var(--ink-2);}
.pill{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 18px;
  border-radius:999px;
  border:1px solid var(--line-strong);
  font-size:14px;
  color:var(--ink-2);
  transition:border-color .24s var(--ease),background-color .24s var(--ease),color .24s var(--ease);
}
.pill:hover{border-color:var(--ink);background:var(--card);color:var(--ink);}

/* ===================== 图片框 ===================== */
.media-frame{
  position:relative;
  overflow:hidden;
  border-radius:var(--r-sm);
  background:var(--soft);
  border:1px solid var(--line);
}
.media-frame img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .4s var(--ease);
}
.media-frame:hover img{transform:scale(1.02);}
.ratio-16-10{aspect-ratio:16 / 10;}
.ratio-16-9{aspect-ratio:16 / 9;}

/* ===================== 面包屑 ===================== */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:26px;}
.breadcrumb a{color:var(--muted);transition:color .24s var(--ease);}
.breadcrumb a:hover{color:var(--ink);}
.breadcrumb span.sep{color:rgba(16,18,20,.25);}
.breadcrumb .current{color:var(--ink);font-weight:500;}

/* ===================== Hero ===================== */
.hero{
  padding:36px 0 0;
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,#FBFAF7 0%,var(--bg) 100%);
}
@media screen and (min-width:1024px){.hero{padding:56px 0 0;}}
.hero-grid{padding-bottom:48px;}
@media screen and (min-width:1024px){.hero-grid{padding-bottom:72px;}}
.hero-title{
  font-size:clamp(34px,5.2vw,62px);
  line-height:1.02;
  letter-spacing:-.02em;
  margin-bottom:20px;
}
.hero-title em{
  font-style:normal;
  display:inline-block;
  background:linear-gradient(transparent 62%,var(--lime-soft) 62%);
}
.hero-sub{
  max-width:46ch;
  color:var(--muted);
  font-size:16px;
  line-height:1.85;
  margin-bottom:32px;
}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:20px;margin-bottom:40px;}
.hero-stats{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:18px;
  padding-top:26px;
  border-top:1px solid var(--line);
  max-width:520px;
}
.hero-stats strong{
  display:block;
  font-family:"Noto Sans SC",sans-serif;
  font-size:30px;
  font-weight:700;
  line-height:1.1;
  font-variant-numeric:tabular-nums;
}
.hero-stats span{
  display:block;
  margin-top:6px;
  font-size:11px;
  letter-spacing:.12em;
  color:var(--muted);
}
.hero-media{margin-top:36px;}
@media screen and (min-width:1024px){
  .hero-media{margin-top:0;}
}
.hero-foot{
  border-top:1px solid var(--line);
  padding:16px 0;
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px;
  font-size:12px;
  letter-spacing:.1em;
  color:var(--muted);
}

/* ===================== 板块标题 ===================== */
.section-head{max-width:760px;margin-bottom:40px;}
@media screen and (min-width:1024px){.section-head{margin-bottom:56px;}}
.section-desc{color:var(--muted);font-size:16px;margin-top:16px;max-width:62ch;}

/* ===================== 步骤时间轴 ===================== */
.steps-row{position:relative;}
.step-cell{position:relative;padding-top:46px;margin-bottom:34px;}
@media screen and (min-width:1024px){
  .step-cell{margin-bottom:0;padding-right:34px;}
}
.step-cell::before{
  content:"";
  position:absolute;
  top:14px;left:0;
  width:100%;height:1px;
  background:var(--line);
}
.step-cell::after{
  content:"";
  position:absolute;
  top:10px;left:0;
  width:9px;height:9px;
  border-radius:50%;
  background:var(--lime);
  box-shadow:0 0 0 4px rgba(216,255,62,.18);
}
.step-num{
  font-family:"Noto Sans SC",sans-serif;
  font-size:42px;
  font-weight:700;
  line-height:1;
  font-variant-numeric:tabular-nums;
  color:var(--ink);
  margin-bottom:16px;
}
.step-cell h3{margin-bottom:10px;}
.step-cell p{color:var(--muted);font-size:15.5px;}

/* ===================== 核对要点列表 ===================== */
.check-list{border-top:1px solid var(--line);}
.check-item{
  display:grid;
  grid-template-columns:56px minmax(0,1fr);
  gap:20px;
  padding:26px 0;
  border-bottom:1px solid var(--line);
  transition:background-color .24s var(--ease);
}
.check-item:hover{background:rgba(216,255,62,.07);}
.check-index{
  font-family:"Noto Sans SC",sans-serif;
  font-size:15px;
  font-weight:700;
  font-variant-numeric:tabular-nums;
  color:var(--muted);
  letter-spacing:.06em;
  padding-top:3px;
}
.check-item h3{margin-bottom:8px;}
.check-item p{color:var(--muted);font-size:15.5px;}

/* ===================== 图文说明 ===================== */
.note-copy h2{margin-bottom:18px;}
.note-copy p{color:var(--muted);margin-bottom:16px;}
.note-list{margin:22px 0 30px;border-top:1px solid var(--line);}
.note-list li{
  position:relative;
  padding:14px 0 14px 22px;
  border-bottom:1px solid var(--line);
  font-size:15.5px;
  color:var(--ink-2);
}
.note-list li::before{
  content:"";
  position:absolute;
  left:0;top:24px;
  width:8px;height:8px;
  background:var(--lime);
  border-radius:1px;
}

/* ===================== 相关分类 ===================== */
.related-bar{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px;
  padding-top:36px;
  margin-top:8px;
  border-top:1px solid var(--line);
}
.related-label{font-size:12px;letter-spacing:.14em;color:var(--muted);}

/* ===================== FAQ ===================== */
.faq-section{background:var(--card);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.faq-head{max-width:720px;margin-bottom:32px;}
.faq-accordion{border:0;background:transparent;margin:0;}
.faq-accordion .accordion-item{
  border:0;
  border-top:1px solid var(--line);
  background:transparent;
}
.faq-accordion .accordion-item:last-child{border-bottom:1px solid var(--line);}
.faq-accordion .accordion-title{
  display:block;
  position:relative;
  padding:26px 56px 26px 0;
  margin:0;
  font-family:"Noto Sans SC",sans-serif;
  font-size:17px;
  font-weight:500;
  line-height:1.6;
  color:var(--ink);
  background:transparent;
  border:0;
  transition:color .24s var(--ease);
}
.faq-accordion .accordion-title:hover{color:var(--ink-2);}
.faq-accordion .accordion-title::before{
  content:"+";
  position:absolute;
  right:6px;
  top:24px;
  width:auto;height:auto;
  margin:0;padding:0;
  font-size:22px;
  font-weight:400;
  line-height:1;
  color:var(--muted);
  transform:none;
  transition:color .24s var(--ease),transform .24s var(--ease);
}
.faq-accordion .accordion-item.is-active > .accordion-title::before{
  content:"−";
  color:var(--ink);
}
.faq-accordion .accordion-content{
  display:none;
  padding:0 56px 28px 0;
  border:0;
  background:transparent;
  color:var(--muted);
  font-size:15px;
  line-height:1.85;
}
.faq-accordion .accordion-content p{margin:0;}

/* ===================== CTA 条 ===================== */
.cta-strip{
  background:var(--ink);
  color:#fff;
  border-top:1px solid var(--lime-line);
  border-radius:var(--r-sm);
  padding:40px 28px;
  display:flex;
  flex-direction:column;
  gap:26px;
}
@media screen and (min-width:1024px){
  .cta-strip{
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    padding:52px 48px;
    gap:40px;
  }
}
.cta-strip h2{color:#fff;font-size:clamp(22px,2.6vw,30px);margin-bottom:12px;}
.cta-strip p{color:rgba(255,255,255,.62);font-size:15px;max-width:52ch;}
.cta-strip-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ===================== 页脚 ===================== */
.site-footer{
  background:var(--ink);
  color:rgba(255,255,255,.72);
  padding:56px 0 28px;
  margin-top:0;
}
.footer-grid{padding-bottom:36px;}
.footer-brand-main{
  font-family:"Noto Serif SC",serif;
  font-size:22px;
  font-weight:700;
  color:#fff;
  letter-spacing:-.02em;
  line-height:1.1;
}
.footer-brand-sub{
  display:block;
  font-size:11px;
  letter-spacing:.2em;
  color:rgba(255,255,255,.45);
  margin-top:6px;
  margin-bottom:18px;
}
.footer-note{font-size:14px;line-height:1.85;color:rgba(255,255,255,.6);max-width:38ch;}
.footer-col{display:flex;flex-direction:column;gap:10px;margin-top:34px;}
@media screen and (min-width:1024px){.footer-col{margin-top:0;}}
.footer-col h4{
  font-family:"Noto Sans SC",sans-serif;
  font-size:12px;
  font-weight:500;
  letter-spacing:.14em;
  color:rgba(255,255,255,.45);
  margin-bottom:6px;
}
.footer-col a,.footer-col p{font-size:14px;color:rgba(255,255,255,.72);transition:color .24s var(--ease);}
.footer-col a:hover{color:var(--lime);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.10);
  padding-top:22px;
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:space-between;
  font-size:13px;
  color:rgba(255,255,255,.5);
}
.footer-bottom a{color:rgba(255,255,255,.6);}
.footer-bottom a:hover{color:var(--lime);}

/* ===================== 动效 ===================== */
.fade-up{opacity:0;transform:translateY(8px);transition:opacity .55s var(--ease),transform .55s var(--ease);}
.fade-up.is-visible{opacity:1;transform:none;}
@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition:none !important;}
  .fade-up{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* ===================== Foundation 覆盖 ===================== */
.accordion{border:0;background:transparent;}
.accordion-title{border:0;}
.accordion-content{border:0;}
.off-canvas-content{box-shadow:none;}

/* roulang page: category3 */
:root{
  --lime:#D8FF3E;
  --lime-deep:#C9F22A;
  --lime-soft:rgba(216,255,62,.16);
  --coral:#FF5C33;
  --ink:#101214;
  --ink-2:#2A2F35;
  --text-soft:#454B52;
  --ivory:#F7F5F0;
  --white:#FFFFFF;
  --muted:#6B7075;
  --line:rgba(16,18,20,.10);
  --line-strong:rgba(16,18,20,.18);
  --line-invert:rgba(255,255,255,.12);
  --r-sm:2px;
  --r-md:4px;
  --sh-hover:0 12px 32px rgba(16,18,20,.06);
  --ease:cubic-bezier(.22,.61,.36,1);
  --t:240ms cubic-bezier(.22,.61,.36,1);
  --font-display:"Noto Serif SC",Georgia,serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ivory);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;background:transparent}
a:hover,a:focus{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:700;letter-spacing:-.02em;margin:0;color:var(--ink);line-height:1.12}
h1{line-height:1.02}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
button,input,select,textarea{font-family:inherit;font-size:inherit;margin:0}
button{cursor:pointer;background:none;border:0;padding:0;color:inherit}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px}
::selection{background:var(--lime);color:var(--ink)}

.grid-container{max-width:1240px;padding-left:32px;padding-right:32px;margin-left:auto;margin-right:auto}
.grid-margin-x{margin-left:-12px;margin-right:-12px}
.grid-margin-x>.cell{padding-left:12px;padding-right:12px}
.grid-x{align-items:stretch}

/* ============ HEADER / NAV ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(247,245,240,.92);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--t),background var(--t);
}
.site-header.is-scrolled{
  background:rgba(247,245,240,.96);
  box-shadow:0 6px 22px rgba(16,18,20,.05);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:72px;
}
.brand{display:flex;flex-direction:column;justify-content:center;line-height:1.1;padding:6px 0}
.brand-main{font-family:var(--font-display);font-weight:700;font-size:19px;letter-spacing:-.02em;color:var(--ink)}
.brand-sub{font-size:11px;letter-spacing:.16em;color:var(--muted);margin-top:3px}
.main-nav ul{display:flex;align-items:center;gap:28px}
.main-nav a{
  position:relative;
  display:inline-block;
  padding:8px 0;
  font-size:14.5px;
  letter-spacing:.02em;
  color:var(--ink-2);
  transition:color var(--t);
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:2px;
  height:2px;
  width:0;
  background:var(--ink);
  transition:width var(--t),background var(--t);
}
.main-nav a:hover{color:var(--ink)}
.main-nav a:hover::after{width:100%}
.main-nav a.active{color:var(--ink);font-weight:500}
.main-nav a.active::after{width:18px;background:var(--lime)}
.header-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;
  position:relative;
  width:44px;
  height:44px;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  background:var(--white);
}
.nav-toggle span{
  position:absolute;
  left:13px;
  width:18px;
  height:1.5px;
  background:var(--ink);
  transition:transform var(--t),opacity var(--t);
}
.nav-toggle span:nth-child(1){top:16px}
.nav-toggle span:nth-child(2){top:21px}
.nav-toggle span:nth-child(3){top:26px}

/* buttons */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:var(--r-sm);
  border:1px solid transparent;
  font-size:15px;
  font-weight:500;
  letter-spacing:.01em;
  white-space:nowrap;
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t);
}
.btn i{transition:transform var(--t)}
.btn:hover i{transform:translateX(4px)}
.btn-primary{background:var(--lime);color:var(--ink)}
.btn-primary:hover{background:var(--lime-deep);color:var(--ink)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:var(--ink-2);color:#fff}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--ink)}
.btn-ghost:hover{border-color:var(--ink);background:rgba(16,18,20,.03)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-lg{height:54px;padding:0 32px;font-size:16px}
.btn-block{width:100%}

.link-arrow{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:15px;
  font-weight:500;
  color:var(--ink);
  padding-bottom:3px;
}
.link-arrow::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  height:1px;
  width:0;
  background:currentColor;
  transition:width var(--t);
}
.link-arrow:hover::after{width:100%}
.link-arrow i{font-size:12px;transition:transform var(--t)}
.link-arrow:hover i{transform:translateX(4px)}

/* ============ MOBILE DRAWER ============ */
.mobile-drawer{
  position:fixed;
  inset:0;
  z-index:120;
  background:var(--ivory);
  transform:translateX(100%);
  transition:transform 320ms cubic-bezier(.22,.61,.36,1);
  display:flex;
  flex-direction:column;
  padding:20px 20px 32px;
  overflow-y:auto;
}
.mobile-drawer.is-open{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;height:56px;border-bottom:1px solid var(--line);margin-bottom:16px}
.drawer-brand{font-family:var(--font-display);font-weight:700;font-size:17px}
.drawer-close{
  width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r-sm);
  display:flex;align-items:center;justify-content:center;font-size:16px;background:#fff;
}
.drawer-nav{margin-bottom:28px}
.drawer-nav li{border-bottom:1px solid var(--line)}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 4px;
  font-family:var(--font-display);
  font-size:22px;
  font-weight:700;
  letter-spacing:-.01em;
}
.drawer-nav a.active{color:var(--ink)}
.drawer-nav a.active::before{
  content:"";
  display:inline-block;
  width:8px;height:8px;border-radius:50%;
  background:var(--lime);
  margin-right:12px;
}
.drawer-foot{margin-top:auto;padding-top:24px;border-top:1px solid var(--line);font-size:13px;color:var(--muted);line-height:1.8}

/* ============ HERO ============ */
.scene-hero{
  position:relative;
  padding:24px 0 96px;
  background-image:linear-gradient(180deg,rgba(247,245,240,.90) 0%,rgba(247,245,240,.97) 55%,rgba(247,245,240,1) 100%),url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
}
.crumbs{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--muted);
  padding:10px 0 0;
}
.crumbs a{transition:color var(--t)}
.crumbs a:hover{color:var(--ink)}
.crumbs .sep{color:rgba(16,18,20,.28)}
.crumbs .current{color:var(--ink-2)}
.hero-narrow{
  max-width:760px;
  margin:0 auto;
  text-align:center;
  padding-top:56px;
}
.hero-kicker{
  display:inline-block;
  font-size:12px;
  letter-spacing:.18em;
  color:var(--muted);
  padding-bottom:10px;
  border-bottom:2px solid var(--lime);
  margin-bottom:28px;
}
.hero-narrow h1{
  font-size:clamp(36px,5.6vw,72px);
  line-height:1.04;
  margin:0 0 24px;
}
.hero-lead{
  font-size:18px;
  line-height:1.85;
  color:var(--text-soft);
  max-width:46ch;
  margin:0 auto;
}
.hero-tags{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:10px;
  margin-top:30px;
}
.tag{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 12px;
  border:1px solid var(--line);
  border-radius:999px;
  font-size:11px;
  letter-spacing:.08em;
  color:var(--ink-2);
  background:rgba(255,255,255,.7);
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  align-items:center;
  gap:20px;
  margin-top:38px;
}

/* ============ SECTION BASE ============ */
.section{padding:96px 0}
.section-head{max-width:720px;margin-bottom:56px}
.section-head h2{font-size:clamp(28px,3.4vw,40px);line-height:1.14;margin-bottom:18px}
.section-head p{color:var(--text-soft);font-size:16.5px;margin:0}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center}

/* ============ STORY ROWS ============ */
.scene-stories{padding:96px 0;background:var(--ivory)}
.story-row{
  align-items:center;
  padding-bottom:72px;
  margin-bottom:72px;
  border-bottom:1px solid var(--line);
}
.story-row:last-child{padding-bottom:0;margin-bottom:0;border-bottom:0}
.story-media .frame{
  position:relative;
  aspect-ratio:16/10;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:var(--white);
}
.story-media .frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform 400ms var(--ease);
}
.story-media .frame:hover img{transform:scale(1.02)}
.story-text{padding-top:8px;padding-bottom:8px}
.story-num{
  display:inline-block;
  font-size:13px;
  font-weight:700;
  letter-spacing:.18em;
  color:var(--muted);
  margin-bottom:14px;
  padding-left:14px;
  position:relative;
}
.story-num::before{
  content:"";
  position:absolute;
  left:0;top:50%;
  transform:translateY(-50%);
  width:8px;height:2px;
  background:var(--lime);
}
.story-text h3{font-size:clamp(22px,2.4vw,28px);margin-bottom:18px}
.story-text p{color:var(--text-soft);font-size:16.5px;line-height:1.9}
.story-text .link-arrow{margin-top:12px}

/* ============ VOICES ============ */
.scene-voices{padding:96px 0;background:var(--white);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.voices-track{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.voice-card{
  margin:0;
  display:flex;
  flex-direction:column;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:32px 28px;
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.voice-card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);border-color:var(--line-strong)}
.voice-stars{font-size:13px;letter-spacing:3px;color:var(--ink);margin-bottom:18px}
.voice-quote{font-size:16px;line-height:1.88;color:var(--text-soft);margin:0 0 22px}
.voice-meta{
  margin-top:auto;
  padding-top:16px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--muted);
  display:flex;
  flex-wrap:wrap;
  gap:6px 12px;
}
.voice-meta strong{color:var(--ink);font-weight:500}

/* ============ RELATED CATEGORIES ============ */
.related-cats{padding:80px 0;background:var(--ivory)}
.mini-title{
  font-family:var(--font-body);
  font-size:12px;
  font-weight:500;
  letter-spacing:.14em;
  color:var(--muted);
  margin-bottom:20px;
}
.cat-pills{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:28px}
.cat-pill{
  display:inline-flex;
  align-items:center;
  height:38px;
  padding:0 20px;
  border:1px solid var(--line);
  border-radius:999px;
  background:var(--white);
  font-size:14px;
  color:var(--ink-2);
  transition:border-color var(--t),color var(--t),background var(--t);
}
.cat-pill:hover{border-color:var(--ink);color:var(--ink)}
.cat-pill.is-active{background:var(--ink);border-color:var(--ink);color:#fff}

/* ============ DARK CTA ============ */
.scene-cta{
  background:var(--ink);
  border-top:1px solid rgba(216,255,62,.08);
  padding:96px 0;
  text-align:center;
}
.scene-cta h2{
  color:#fff;
  font-size:clamp(28px,3.6vw,44px);
  line-height:1.14;
  max-width:22ch;
  margin:0 auto 22px;
}
.scene-cta .cta-lead{
  color:rgba(255,255,255,.66);
  font-size:16.5px;
  max-width:56ch;
  margin:0 auto 34px;
}
.scene-cta .btn-primary:hover{background:var(--lime-deep)}
.cta-rules{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:14px 32px;
  margin-top:34px;
  font-size:13px;
  color:rgba(255,255,255,.5);
}
.cta-rules li{display:flex;align-items:center;gap:8px}
.cta-rules li::before{
  content:"";
  width:6px;height:6px;
  border-radius:1px;
  background:var(--lime);
  flex:none;
}

/* ============ FOOTER ============ */
.site-footer{background:var(--ink);color:rgba(255,255,255,.7);padding:72px 0 0}
.footer-grid{padding-bottom:56px}
.footer-brand-main{font-family:var(--font-display);font-size:22px;font-weight:700;color:#fff;letter-spacing:-.02em}
.footer-brand-sub{display:block;font-size:11px;letter-spacing:.16em;color:var(--lime);margin-top:6px}
.footer-note{font-size:14px;line-height:1.85;color:rgba(255,255,255,.58);margin-top:18px;max-width:36ch}
.footer-col h4{
  font-family:var(--font-body);
  font-size:12px;
  font-weight:500;
  letter-spacing:.14em;
  color:#fff;
  margin-bottom:16px;
}
.footer-col a{
  display:block;
  font-size:14px;
  color:rgba(255,255,255,.66);
  padding:6px 0;
  transition:color var(--t);
}
.footer-col a:hover{color:var(--lime)}
.footer-col p{font-size:13.5px;line-height:1.8;color:rgba(255,255,255,.55);margin:0 0 8px}
.footer-bottom{
  border-top:1px solid var(--line-invert);
  padding:22px 0;
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:12px;
  font-size:13px;
  color:rgba(255,255,255,.5);
}
.footer-bottom a{color:rgba(255,255,255,.7);transition:color var(--t)}
.footer-bottom a:hover{color:var(--lime)}

/* ============ REVEAL ============ */
.reveal-up{
  opacity:0;
  transform:translateY(8px);
  transition:opacity 600ms var(--ease),transform 600ms var(--ease);
}
.reveal-up.is-visible{opacity:1;transform:none}

/* ============ RESPONSIVE ============ */
@media (max-width:1279px){
  .grid-container{max-width:1200px}
}
@media (max-width:1023px){
  .grid-container{padding-left:24px;padding-right:24px}
  .header-inner{height:64px}
  .main-nav{display:none}
  .nav-toggle{display:block}
  .header-actions .btn{display:none}
  .section{padding:64px 0}
  .scene-hero{padding-bottom:64px}
  .hero-narrow{padding-top:40px}
  .hero-narrow h1{font-size:clamp(32px,7vw,54px)}
  .story-row{padding-bottom:48px;margin-bottom:48px}
  .story-media{margin-bottom:32px}
  .scene-voices,.related-cats,.scene-cta{padding:64px 0}
  .voices-track{
    display:flex;
    gap:16px;
    overflow-x:auto;
    scroll-snap-type:x mandatory;
    padding-bottom:8px;
    margin-left:-24px;
    margin-right:-24px;
    padding-left:24px;
    padding-right:24px;
  }
  .voice-card{min-width:280px;flex:0 0 78%;scroll-snap-align:start}
  .section-head{margin-bottom:40px}
}
@media (min-width:1024px){
  .mobile-drawer{display:none}
  .story-row--reverse .story-media{order:2}
  .story-row--reverse .story-text{order:1}
}
@media (max-width:639px){
  body{font-size:16px}
  .grid-container{padding-left:20px;padding-right:20px}
  .grid-margin-x{margin-left:-8px;margin-right:-8px}
  .grid-margin-x>.cell{padding-left:8px;padding-right:8px}
  .brand-main{font-size:17px}
  .brand-sub{font-size:10px;letter-spacing:.12em}
  .hero-narrow h1{font-size:clamp(30px,8.6vw,40px)}
  .hero-lead{font-size:16.5px}
  .hero-actions{flex-direction:column;align-items:stretch;gap:14px}
  .hero-actions .btn{width:100%}
  .hero-actions .link-arrow{justify-content:center}
  .hero-tags{gap:8px}
  .tag{height:22px;font-size:11px;padding:0 10px}
  .section{padding:48px 0}
  .scene-hero{padding-bottom:48px}
  .story-text h3{font-size:21px}
  .story-text p{font-size:15.5px}
  .voice-card{flex:0 0 88%;padding:26px 22px}
  .cat-pill{height:36px;font-size:13px;padding:0 16px}
  .scene-cta{padding:56px 0}
  .cta-rules{flex-direction:column;align-items:center;gap:12px;text-align:center}
  .footer-grid{padding-bottom:32px}
  .footer-col{margin-top:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal-up{opacity:1;transform:none;transition:none}
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
}

/* roulang page: category2 */
:root{
  --lime:#D8FF3E;
  --lime-deep:#c6ef21;
  --coral:#FF5C33;
  --ink:#101214;
  --ink-2:#2A2F35;
  --ivory:#F7F5F0;
  --white:#FFFFFF;
  --line:rgba(16,18,20,.10);
  --line-strong:rgba(16,18,20,.18);
  --muted:#6B7075;
  --r2:2px;
  --r4:4px;
  --shadow-hover:0 12px 32px rgba(16,18,20,.06);
  --ease:cubic-bezier(.22,.61,.36,1);
  --serif:'Noto Serif SC','Songti SC',serif;
  --sans:'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;padding:0;background:var(--ivory);color:var(--ink);
  font-family:var(--sans);font-size:16px;line-height:1.85;font-weight:400;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,li,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;background:transparent;transition:color .24s var(--ease);}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;}
.grid-container{max-width:1240px;padding-left:32px;padding-right:32px;}
.grid-margin-x{margin-left:-12px;margin-right:-12px;}
.grid-margin-x > .cell{margin-left:12px;margin-right:12px;width:calc(100% - 24px);}
.grid-x > .cell{width:calc(100% - 24px);}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;font-size:11px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--muted);font-weight:500;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--lime-deep);}
.display{font-family:var(--serif);font-weight:700;letter-spacing:-.02em;line-height:1.06;}
.section{padding:96px 0;}
.section-alt{background:var(--white);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{margin-bottom:48px;max-width:780px;}
.section-head h2{font-family:var(--serif);font-weight:700;font-size:clamp(26px,3.2vw,40px);line-height:1.15;letter-spacing:-.02em;margin-top:18px;}
.section-head p{margin-top:16px;color:var(--muted);font-size:16px;max-width:62ch;}
.num{font-variant-numeric:tabular-nums;font-weight:700;}

/* ---------- 按钮体系 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:50px;padding:0 24px;border:1px solid transparent;border-radius:var(--r2);
  font-size:14px;font-weight:500;letter-spacing:.02em;cursor:pointer;background:none;
  transition:background .24s var(--ease),color .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.btn i{transition:transform .24s var(--ease);font-size:12px;}
.btn:hover i{transform:translateX(4px);}
.btn-lime{background:var(--lime);color:var(--ink);}
.btn-lime:hover{background:var(--lime-deep);color:var(--ink);}
.btn-ink{background:var(--ink);color:#fff;}
.btn-ink:hover{background:var(--ink-2);color:#fff;}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--ink);}
.btn-ghost:hover{border-color:var(--ink);background:rgba(16,18,20,.03);}
.btn-sm{height:40px;padding:0 18px;font-size:13px;}
.btn-block{width:100%;}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.4;cursor:not-allowed;}
.link-more{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:500;
  position:relative;color:var(--ink);
}
.link-more::after{content:"";position:absolute;left:0;bottom:-4px;width:100%;height:1px;background:var(--ink);transform:scaleX(0);transform-origin:left;transition:transform .24s var(--ease);}
.link-more:hover::after{transform:scaleX(1);}
.link-more i{font-size:11px;transition:transform .24s var(--ease);}
.link-more:hover i{transform:translateX(4px);}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--ivory);border-bottom:1px solid var(--line);
  transition:background .3s var(--ease),box-shadow .3s var(--ease);
}
.site-header.scrolled{background:rgba(247,245,240,.92);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:0 1px 14px rgba(16,18,20,.06);}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:72px;}
.brand{display:flex;flex-direction:column;gap:3px;line-height:1;}
.brand-main{font-family:var(--serif);font-weight:700;font-size:20px;letter-spacing:-.01em;color:var(--ink);}
.brand-sub{font-size:11px;letter-spacing:.2em;color:var(--muted);}
.main-nav ul{display:flex;align-items:center;gap:30px;}
.main-nav a{position:relative;display:inline-block;padding:8px 0;font-size:14.5px;letter-spacing:.02em;color:var(--ink-2);}
.main-nav a::after{content:"";position:absolute;left:0;bottom:2px;width:100%;height:1px;background:var(--ink);transform:scaleX(0);transform-origin:left;transition:transform .24s var(--ease);}
.main-nav a:hover{color:var(--ink);}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a.active{color:var(--ink);font-weight:500;}
.main-nav a.active::before{content:"";position:absolute;left:0;bottom:-7px;width:18px;height:2px;background:var(--lime);}
.header-actions{display:flex;align-items:center;gap:14px;}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);background:transparent;border-radius:var(--r2);
  cursor:pointer;padding:0;align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:1px;background:var(--ink);transition:transform .24s var(--ease),opacity .24s var(--ease);}

/* ---------- 抽屉 ---------- */
.drawer{position:fixed;inset:0;z-index:90;pointer-events:none;}
.drawer::before{content:"";position:absolute;inset:0;background:rgba(16,18,20,.42);opacity:0;transition:opacity .3s var(--ease);}
.drawer-panel{
  position:absolute;top:0;left:0;bottom:0;width:min(84vw,360px);background:var(--ivory);
  transform:translateX(-102%);transition:transform .34s var(--ease);
  display:flex;flex-direction:column;padding:24px 24px 28px;
}
.drawer.open{pointer-events:auto;}
.drawer.open::before{opacity:1;}
.drawer.open .drawer-panel{transform:translateX(0);}
.drawer-head{display:flex;align-items:flex-start;justify-content:space-between;padding-bottom:20px;border-bottom:1px solid var(--line);}
.drawer-head .brand{gap:4px;}
.drawer-close{width:44px;height:44px;border:1px solid var(--line);background:transparent;border-radius:var(--r2);cursor:pointer;font-size:15px;color:var(--ink);}
.drawer-nav{display:flex;flex-direction:column;padding-top:12px;flex:1;}
.drawer-nav a{font-family:var(--serif);font-weight:700;font-size:22px;letter-spacing:-.01em;padding:16px 0;border-bottom:1px solid var(--line);}
.drawer-nav a.active{color:var(--ink);}
.drawer-nav a.active::after{content:"";display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--lime);margin-left:12px;vertical-align:middle;}
.drawer-cta{margin-top:24px;}

/* ---------- 面包屑 ---------- */
.crumbs{padding:22px 0 0;}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--muted);}
.crumbs li{display:flex;align-items:center;gap:10px;}
.crumbs li + li::before{content:"/";color:var(--line-strong);}
.crumbs a:hover{color:var(--ink);}
.crumbs .current{color:var(--ink);max-width:44ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ---------- Hero ---------- */
.hero{padding:56px 0 72px;}
.hero-grid{align-items:center;}
.hero h1{font-size:clamp(32px,4.6vw,60px);margin-top:20px;}
.hero h1 em{font-style:normal;background:linear-gradient(transparent 68%,var(--lime) 68%);padding:0 2px;}
.hero-sub{margin-top:22px;max-width:46ch;color:var(--muted);font-size:17px;}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:18px;margin-top:34px;}
.hero-anchors{margin-top:38px;padding-top:22px;border-top:1px solid var(--line);}
.hero-anchors .label{font-size:12px;letter-spacing:.14em;color:var(--muted);}
.hero-anchors ul{display:flex;flex-wrap:wrap;gap:24px;margin-top:14px;}
.hero-anchors a{font-size:14px;color:var(--ink-2);display:inline-flex;align-items:center;gap:8px;}
.hero-anchors a span{font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums;}
.hero-anchors a:hover{color:var(--ink);}
.hero-anchors a:hover span{color:var(--ink);}
.hero-figure{position:relative;}
.hero-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r4);}
.hero-badge{
  position:absolute;top:16px;right:-10px;transform:rotate(4deg);
  background:rgba(247,245,240,.94);border:1px solid var(--line-strong);border-radius:999px;
  padding:7px 16px;font-size:11px;letter-spacing:.1em;color:var(--ink-2);
}
.stats{display:flex;flex-wrap:wrap;gap:48px;margin-top:56px;padding-top:28px;border-top:1px solid var(--line);}
.stat b{display:block;font-size:32px;line-height:1;font-variant-numeric:tabular-nums;font-weight:700;}
.stat span{display:block;margin-top:10px;font-size:12px;letter-spacing:.12em;color:var(--muted);}

/* ---------- 参数对照 ---------- */
.spec-group + .spec-group{margin-top:64px;}
.spec-group .group-head{display:flex;align-items:baseline;gap:16px;padding-bottom:18px;border-bottom:1px solid var(--ink);}
.spec-group .group-head .idx{font-family:var(--serif);font-size:22px;font-weight:700;color:var(--muted);}
.spec-group .group-head h3{font-size:19px;font-weight:500;letter-spacing:.01em;}
.spec-group .group-head .tip{margin-left:auto;font-size:13px;color:var(--muted);}
.spec-row{padding:20px 0;border-bottom:1px solid var(--line);align-items:baseline;}
.spec-row:last-child{border-bottom:0;}
.spec-label{font-size:15px;color:var(--muted);}
.spec-value{font-size:16px;font-weight:500;}
.spec-note{display:block;margin-top:4px;font-size:13px;font-weight:400;color:var(--muted);line-height:1.75;}
.tag{
  display:inline-block;height:22px;line-height:22px;padding:0 10px;border-radius:999px;
  font-size:11px;letter-spacing:.08em;background:rgba(16,18,20,.05);color:var(--ink-2);
}
.tag-lime{background:var(--lime);color:var(--ink);}
.tag-line{background:transparent;border:1px solid var(--line-strong);color:var(--muted);}

/* ---------- 2+1 特性 ---------- */
.feature-wide{
  background:var(--white);border:1px solid var(--line);border-radius:var(--r4);overflow:hidden;
  height:100%;display:flex;flex-direction:column;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.feature-wide:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.feature-wide img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.feature-wide .body{padding:32px;}
.feature-wide h3{font-family:var(--serif);font-size:24px;font-weight:700;line-height:1.25;}
.feature-wide p{margin-top:14px;color:var(--muted);font-size:15px;max-width:56ch;}
.step-list{margin-top:26px;border-top:1px solid var(--line);}
.step-list li{display:flex;gap:18px;padding:16px 0;border-bottom:1px solid var(--line);align-items:baseline;}
.step-list .n{font-family:var(--serif);font-size:15px;font-weight:700;color:var(--muted);min-width:26px;}
.step-list .t{font-size:15px;font-weight:500;}
.step-list .d{display:block;font-weight:400;font-size:13px;color:var(--muted);margin-top:3px;}
.feature-side{
  background:var(--ink);color:#fff;border-radius:var(--r4);padding:32px 28px;height:100%;
  display:flex;flex-direction:column;
}
.feature-side h3{font-family:var(--serif);font-size:20px;font-weight:700;}
.feature-side .sub{margin-top:12px;font-size:13px;color:rgba(255,255,255,.62);line-height:1.8;}
.log-list{margin-top:24px;border-top:1px solid rgba(255,255,255,.14);}
.log-list li{padding:16px 0;border-bottom:1px solid rgba(255,255,255,.14);}
.log-list .date{font-size:12px;letter-spacing:.1em;color:var(--lime);font-variant-numeric:tabular-nums;}
.log-list .txt{display:block;margin-top:6px;font-size:14px;color:rgba(255,255,255,.86);line-height:1.7;}
.feature-side .side-link{margin-top:auto;padding-top:24px;color:#fff;font-size:14px;display:inline-flex;align-items:center;gap:8px;}
.feature-side .side-link i{font-size:11px;transition:transform .24s var(--ease);}
.feature-side .side-link:hover i{transform:translateX(4px);}

/* ---------- FAQ ---------- */
.faq-col h3{font-family:var(--serif);font-size:19px;font-weight:700;padding-bottom:16px;border-bottom:1px solid var(--ink);}
.faq-accordion{margin:0;background:transparent;border:0;}
.faq-accordion .accordion-item{border-bottom:1px solid var(--line);}
.faq-accordion .accordion-title{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 0;font-size:17px;font-weight:500;line-height:1.6;color:var(--ink);
  background:transparent;border:0;
}
.faq-accordion .accordion-title:hover{background:transparent;color:var(--ink);}
.faq-accordion .accordion-title::before{display:none;}
.faq-accordion .accordion-title::after{
  content:"+";font-size:18px;font-weight:400;color:var(--muted);line-height:1;
  transition:transform .24s var(--ease),color .24s var(--ease);flex:0 0 auto;
}
.faq-accordion .accordion-item.is-active .accordion-title::after{content:"−";color:var(--ink);}
.faq-accordion .accordion-content{
  padding:0 0 22px;border:0;background:transparent;color:var(--muted);font-size:15px;line-height:1.85;
}
.faq-accordion .accordion-content p + p{margin-top:10px;}

/* ---------- 咨询表单（深色） ---------- */
.contact-dark{background:var(--ink);color:#fff;border-top:1px solid rgba(216,255,62,.14);}
.contact-dark .eyebrow{color:rgba(255,255,255,.6);}
.contact-dark h2{font-family:var(--serif);font-weight:700;font-size:clamp(26px,3.2vw,38px);line-height:1.18;letter-spacing:-.02em;margin-top:18px;color:#fff;}
.point-list{margin-top:32px;}
.point-list li{display:flex;gap:14px;padding:16px 0;border-top:1px solid rgba(255,255,255,.14);font-size:15px;color:rgba(255,255,255,.82);}
.point-list li:last-child{border-bottom:1px solid rgba(255,255,255,.14);}
.point-list i{color:var(--lime);font-size:12px;margin-top:7px;}
.panel-form{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.14);border-radius:var(--r4);padding:32px 28px;}
.field{margin-bottom:20px;}
.field label{display:block;font-size:12px;letter-spacing:.1em;color:var(--muted);margin-bottom:8px;}
.contact-dark .field label{color:rgba(255,255,255,.62);}
.field input,.field select,.field textarea{
  width:100%;height:48px;padding:0 14px;border:1px solid var(--line);border-radius:var(--r2);
  background:#fff;font-family:var(--sans);font-size:15px;color:var(--ink);
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.field textarea{height:auto;min-height:110px;padding:12px 14px;line-height:1.75;resize:vertical;}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);background-position:calc(100% - 20px) 21px,calc(100% - 15px) 21px;background-size:5px 5px,5px 5px;background-repeat:no-repeat;}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--ink);box-shadow:0 2px 0 0 var(--lime);}
.field.has-error input,.field.has-error select,.field.has-error textarea{border-color:var(--coral);}
.field-error{display:none;margin-top:8px;padding-left:9px;border-left:2px solid var(--coral);font-size:13px;color:var(--coral);line-height:1.7;}
.field.has-error .field-error{display:block;}
.check-line{display:flex;gap:10px;align-items:flex-start;font-size:13px;line-height:1.7;color:rgba(255,255,255,.6);}
.check-line input{width:16px;height:16px;margin-top:4px;flex:0 0 auto;accent-color:#D8FF3E;}
.form-success{
  display:none;border:1px dashed rgba(216,255,62,.5);border-radius:var(--r2);padding:26px 22px;text-align:center;
}
.form-success strong{display:block;font-family:var(--serif);font-size:19px;color:#fff;}
.form-success span{display:block;margin-top:10px;font-size:14px;color:rgba(255,255,255,.7);}
.form-success.is-on{display:block;}

/* ---------- 相关分类 ---------- */
.related{padding:72px 0;}
.related h2{font-family:var(--serif);font-size:22px;font-weight:700;}
.related p{margin-top:10px;color:var(--muted);font-size:14px;}
.chip-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.chip{
  display:inline-flex;align-items:center;gap:8px;height:38px;padding:0 18px;border-radius:999px;
  border:1px solid var(--line-strong);font-size:14px;color:var(--ink-2);background:transparent;
  transition:border-color .24s var(--ease),background .24s var(--ease),color .24s var(--ease);
}
.chip:hover{border-color:var(--ink);background:var(--white);color:var(--ink);}
.chip-home{background:var(--ink);color:#fff;border-color:var(--ink);}
.chip-home:hover{background:var(--ink-2);color:#fff;border-color:var(--ink-2);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);border-top:1px solid rgba(216,255,62,.12);padding:80px 0 0;}
.footer-grid{padding-bottom:56px;}
.footer-brand-main{font-family:var(--serif);font-weight:700;font-size:22px;color:#fff;line-height:1.2;}
.footer-brand-sub{display:block;margin-top:6px;font-size:11px;letter-spacing:.2em;color:rgba(255,255,255,.5);}
.footer-note{margin-top:20px;font-size:14px;line-height:1.85;max-width:38ch;color:rgba(255,255,255,.62);}
.footer-col h4{font-size:12px;letter-spacing:.14em;color:rgba(255,255,255,.5);font-weight:500;margin-bottom:18px;}
.footer-col a{display:block;position:relative;padding:7px 0;font-size:14px;color:rgba(255,255,255,.78);}
.footer-col a::after{content:"";position:absolute;left:0;bottom:3px;width:100%;height:1px;background:var(--lime);transform:scaleX(0);transform-origin:left;transition:transform .24s var(--ease);}
.footer-col a:hover{color:#fff;}
.footer-col a:hover::after{transform:scaleX(1);}
.footer-col p{font-size:14px;line-height:1.82;margin-bottom:10px;color:rgba(255,255,255,.62);}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;align-items:center;
  padding:24px 0 30px;border-top:1px solid rgba(255,255,255,.12);font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom a{color:rgba(255,255,255,.7);}
.footer-bottom a:hover{color:#fff;}

/* ---------- 动效 ---------- */
.reveal-up{opacity:0;transform:translateY(8px);}
.reveal-up.in{opacity:1;transform:none;transition:opacity .6s var(--ease),transform .6s var(--ease);}

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

/* ---------- 响应式 ---------- */
@media screen and (max-width:1279px){
  .grid-container{padding-left:28px;padding-right:28px;}
}
@media screen and (max-width:1023px){
  .section{padding:64px 0;}
  .hero{padding:40px 0 56px;}
  .main-nav{display:none;}
  .nav-toggle{display:flex;}
  .header-inner{min-height:64px;}
  .hero-anchors ul{gap:18px;}
  .footer-grid{padding-bottom:40px;}
  .footer-col{margin-top:36px;}
}
@media screen and (max-width:639px){
  .grid-container{padding-left:20px;padding-right:20px;}
  .grid-margin-x{margin-left:-10px;margin-right:-10px;}
  .grid-margin-x > .cell{margin-left:10px;margin-right:10px;width:calc(100% - 20px);}
  .section{padding:48px 0;}
  .section-head{margin-bottom:32px;}
  .hero h1{font-size:clamp(28px,8vw,40px);}
  .stats{gap:28px;}
  .stat b{font-size:26px;}
  .spec-group + .spec-group{margin-top:44px;}
  .spec-group .group-head{flex-wrap:wrap;gap:10px;}
  .spec-group .group-head .tip{margin-left:0;width:100%;}
  .panel-form{padding:24px 20px;}
  .btn{height:48px;padding:0 20px;}
  .hero-badge{top:10px;right:8px;transform:none;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

/* roulang page: category4 */
:root{
  --lime:#D8FF3E;
  --lime-soft:rgba(216,255,62,.22);
  --coral:#FF5C33;
  --ink:#101214;
  --ink-2:#2A2F35;
  --bg:#F7F5F0;
  --white:#FFFFFF;
  --line:rgba(16,18,20,.10);
  --line-strong:rgba(16,18,20,.18);
  --muted:#6B7075;
  --r-sm:2px;
  --r-md:4px;
  --shadow-hover:0 12px 32px rgba(16,18,20,.06);
  --serif:'Noto Serif SC','Songti SC',serif;
  --sans:'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --ease:cubic-bezier(.22,.61,.36,1);
  --nav-h:72px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--sans);
  font-size:17px;
  font-weight:400;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
p+p{margin-top:1em;}

.grid-container{max-width:1240px;padding-left:32px;padding-right:32px;}
.grid-container.full{max-width:none;}
.grid-margin-x{margin-left:-12px;margin-right:-12px;}
.grid-margin-x>.cell{padding-left:12px;padding-right:12px;}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0;}
.section.tight{padding:64px 0;}
.section-head{margin-bottom:48px;}
.eyebrow{
  font-size:12px;letter-spacing:.14em;color:var(--muted);
  text-transform:uppercase;margin-bottom:14px;display:block;
}
.h2{
  font-family:var(--serif);font-weight:700;font-size:clamp(26px,3.4vw,38px);
  line-height:1.15;letter-spacing:-.02em;
}
.lead{color:var(--muted);font-size:17px;max-width:64ch;margin-top:16px;}
.hairline{height:1px;background:var(--line);border:0;margin:0;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  height:52px;padding:0 26px;border:1px solid transparent;border-radius:var(--r-sm);
  font-size:15px;font-weight:500;letter-spacing:.02em;cursor:pointer;
  transition:background-color .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),transform .24s var(--ease);
}
.btn .arw{transition:transform .24s var(--ease);}
.btn:hover .arw{transform:translateX(4px);}
.btn-primary{background:var(--lime);color:var(--ink);}
.btn-primary:hover{background:#c8ef2c;}
.btn-dark{background:var(--ink);color:#fff;}
.btn-dark:hover{background:var(--ink-2);}
.btn-ghost{border-color:var(--line-strong);color:var(--ink);background:transparent;height:48px;}
.btn-ghost:hover{border-color:var(--ink);}
.btn-block{width:100%;justify-content:center;}
.btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid var(--lime);outline-offset:2px;
}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;font-size:14.5px;font-weight:500;
  color:var(--ink);position:relative;padding-bottom:2px;
}
.link-arrow::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:100%;
  background:var(--ink);transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease);
}
.link-arrow:hover::after{transform:scaleX(1);}
.link-arrow .arw{transition:transform .24s var(--ease);}
.link-arrow:hover .arw{transform:translateX(4px);}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,245,240,.92);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .24s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(16,18,20,.05);}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  height:var(--nav-h);
}
.brand{display:flex;flex-direction:column;line-height:1.05;}
.brand-main{font-family:var(--serif);font-weight:700;font-size:20px;letter-spacing:-.02em;}
.brand-sub{font-size:11px;letter-spacing:.18em;color:var(--muted);margin-top:4px;}
.main-nav ul{display:flex;align-items:center;gap:28px;}
.main-nav a{
  position:relative;display:inline-block;padding:6px 0;
  font-size:14.5px;letter-spacing:.02em;color:var(--ink-2);
}
.main-nav a::after{
  content:"";position:absolute;left:0;bottom:0;width:100%;height:1px;
  background:currentColor;transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease);
}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a.active{color:var(--ink);font-weight:500;}
.main-nav a.active::after{width:18px;height:2px;background:var(--lime);transform:scaleX(1);}
.header-right{display:flex;align-items:center;gap:16px;}
.nav-cta{height:44px;padding:0 20px;font-size:14px;}
.hamburger{
  display:none;width:44px;height:44px;border:1px solid var(--line-strong);
  border-radius:var(--r-sm);background:transparent;cursor:pointer;
  padding:0;align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.hamburger span{display:block;width:18px;height:1px;background:var(--ink);}

/* 移动端抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(16,18,20,.4);
  opacity:0;visibility:hidden;transition:opacity .24s var(--ease),visibility .24s var(--ease);z-index:70;
}
.drawer-mask.open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:min(360px,86vw);
  background:var(--bg);border-left:1px solid var(--line);z-index:80;
  transform:translateX(100%);transition:transform .3s var(--ease);
  display:flex;flex-direction:column;padding:24px;
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:28px;}
.drawer-close{
  width:44px;height:44px;border:1px solid var(--line-strong);background:transparent;
  border-radius:var(--r-sm);font-size:18px;line-height:1;cursor:pointer;color:var(--ink);
}
.drawer-nav a{
  display:block;padding:18px 0;border-bottom:1px solid var(--line);
  font-family:var(--serif);font-weight:700;font-size:20px;letter-spacing:-.01em;
}
.drawer-nav a.active{color:var(--ink);border-bottom-color:var(--ink);}
.drawer-foot{margin-top:auto;padding-top:24px;}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding:24px 0 0;}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--muted);}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--ink);}
.breadcrumb li[aria-current]{
  color:var(--ink);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.breadcrumb .sep{color:var(--line-strong);}

/* ---------- Hero ---------- */
.hero{padding:56px 0 72px;}
.hero-grid{align-items:center;}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;height:24px;padding:0 12px;
  border:1px solid var(--line-strong);border-radius:999px;
  font-size:11px;letter-spacing:.08em;color:var(--ink-2);background:var(--white);
  margin-bottom:20px;
}
.hero-badge i{width:6px;height:6px;border-radius:50%;background:var(--lime);display:block;}
.hero-title{
  font-family:var(--serif);font-weight:700;
  font-size:clamp(32px,5.2vw,58px);line-height:1.04;letter-spacing:-.02em;
}
.hero-sub{margin-top:22px;color:var(--muted);font-size:17px;max-width:46ch;}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:20px;margin-top:32px;}
.hero-stats{display:flex;flex-wrap:wrap;gap:48px;margin-top:48px;padding-top:28px;border-top:1px solid var(--line);}
.hero-stat b{
  display:block;font-family:var(--sans);font-weight:700;font-size:30px;
  font-variant-numeric:tabular-nums;letter-spacing:-.01em;line-height:1.1;
}
.hero-stat span{display:block;margin-top:8px;font-size:12px;letter-spacing:.12em;color:var(--muted);}
.hero-figure{
  position:relative;border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;aspect-ratio:16 / 10;background:var(--white);
}
.hero-figure img{width:100%;height:100%;object-fit:cover;}
.hero-figure figcaption{
  position:absolute;left:0;bottom:0;right:0;padding:16px 20px;
  background:linear-gradient(to top,rgba(16,18,20,.72),rgba(16,18,20,0));
  color:#fff;font-size:12.5px;letter-spacing:.04em;
}

/* ---------- 清单分组 ---------- */
.checklist .group-cell{position:relative;}
.group-sticky{position:sticky;top:calc(var(--nav-h) + 32px);}
.group-index{
  font-family:var(--sans);font-weight:700;font-size:44px;line-height:1;
  font-variant-numeric:tabular-nums;color:var(--ink);letter-spacing:-.02em;
}
.group-title{
  font-family:var(--serif);font-weight:700;font-size:22px;line-height:1.3;
  margin-top:14px;letter-spacing:-.01em;
}
.group-desc{margin-top:12px;color:var(--muted);font-size:14.5px;max-width:26ch;}
.group-rule{width:34px;height:2px;background:var(--lime);margin-top:20px;}
.topic-block{padding-bottom:56px;}
.topic-block + .topic-block{padding-top:56px;border-top:1px solid var(--line);}
.item-row{
  display:flex;align-items:flex-start;gap:20px;
  padding:22px 0;border-top:1px solid var(--line);
  transition:transform .24s var(--ease);
}
.item-row:last-child{border-bottom:1px solid var(--line);}
.item-row:hover{transform:translateY(-2px);}
.item-num{
  flex:0 0 auto;min-width:38px;
  font-family:var(--sans);font-weight:700;font-size:15px;
  font-variant-numeric:tabular-nums;color:var(--muted);padding-top:3px;
}
.item-body{flex:1 1 auto;min-width:0;}
.item-body h3{
  font-size:17.5px;font-weight:500;line-height:1.5;letter-spacing:0;
}
.item-body p{margin-top:8px;color:var(--muted);font-size:14.5px;line-height:1.8;}
.item-link{margin-top:12px;}

/* ---------- 提示条 ---------- */
.tip-bar{
  background:var(--lime-soft);border-left:3px solid var(--lime);
  border-radius:var(--r-sm);padding:28px 32px;
}
.tip-bar h3{font-family:var(--serif);font-weight:700;font-size:20px;line-height:1.4;letter-spacing:-.01em;}
.tip-bar p{margin-top:12px;color:var(--ink-2);font-size:15.5px;max-width:78ch;}
.tip-bar ul{margin-top:16px;display:flex;flex-wrap:wrap;gap:12px 28px;}
.tip-bar li{font-size:14.5px;color:var(--ink-2);position:relative;padding-left:16px;}
.tip-bar li::before{
  content:"";position:absolute;left:0;top:.72em;width:7px;height:7px;background:var(--lime);
  border:1px solid rgba(16,18,20,.18);border-radius:1px;
}

/* ---------- 对照速查 ---------- */
.quick-grid .quick-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--r-md);
  padding:32px 28px;height:100%;display:flex;flex-direction:column;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease);
}
.quick-grid .quick-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.quick-card .tag{
  display:inline-flex;align-items:center;height:22px;padding:0 10px;border-radius:999px;
  background:var(--lime);color:var(--ink);font-size:11px;letter-spacing:.08em;
  margin-bottom:18px;align-self:flex-start;
}
.quick-card h3{font-size:19px;font-weight:500;line-height:1.45;}
.quick-card p{margin-top:12px;color:var(--muted);font-size:14.5px;flex:1 1 auto;}
.quick-card .link-arrow{margin-top:20px;}

/* ---------- FAQ ---------- */
.faq-list{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:24px;
  padding:24px 0;background:transparent;border:0;cursor:pointer;text-align:left;
  font-size:17px;font-weight:500;color:var(--ink);line-height:1.6;
}
.faq-icon{
  position:relative;flex:0 0 auto;width:16px;height:16px;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--ink-2);transition:transform .24s var(--ease),opacity .24s var(--ease);
}
.faq-icon::before{left:0;top:7.5px;width:16px;height:1px;}
.faq-icon::after{left:7.5px;top:0;width:1px;height:16px;}
.faq-item.open .faq-icon::after{transform:scaleY(0);opacity:0;}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .32s var(--ease);
}
.faq-a-inner{padding:0 48px 26px 0;color:var(--muted);font-size:15px;line-height:1.85;}
.faq-item.open .faq-a{max-height:340px;}

/* ---------- CTA 深色带 ---------- */
.dark-band{
  background:var(--ink);color:#fff;border-top:1px solid rgba(216,255,62,.18);
}
.dark-band .h2{color:#fff;}
.dark-band .lead{color:rgba(255,255,255,.66);}
.dark-band .cta-row{display:flex;flex-wrap:wrap;gap:16px;margin-top:32px;}
.dark-band .facts{
  display:flex;flex-wrap:wrap;gap:40px;margin-top:44px;padding-top:28px;
  border-top:1px solid rgba(255,255,255,.14);
}
.dark-band .facts b{
  display:block;font-size:26px;font-weight:700;font-variant-numeric:tabular-nums;line-height:1.15;color:var(--lime);
}
.dark-band .facts span{display:block;margin-top:8px;font-size:12px;letter-spacing:.12em;color:rgba(255,255,255,.56);}

/* ---------- 相关分类 ---------- */
.chip-list{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px;}
.chip{
  display:inline-flex;align-items:center;height:34px;padding:0 18px;border-radius:999px;
  border:1px solid var(--line-strong);font-size:13.5px;color:var(--ink-2);background:var(--white);
  transition:border-color .24s var(--ease),background-color .24s var(--ease),transform .24s var(--ease);
}
.chip:hover{border-color:var(--ink);background:var(--lime);transform:translateY(-2px);}
.back-home{margin-top:32px;padding-top:28px;border-top:1px solid var(--line);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.76);padding:72px 0 0;margin-top:0;}
.footer-grid{padding-bottom:56px;}
.footer-brand-main{font-family:var(--serif);font-weight:700;font-size:22px;color:#fff;letter-spacing:-.01em;}
.footer-brand-sub{display:block;margin-top:6px;font-size:11px;letter-spacing:.18em;color:rgba(255,255,255,.5);}
.footer-note{margin-top:20px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.6);max-width:38ch;}
.footer-col h4{
  font-size:12px;letter-spacing:.14em;color:rgba(255,255,255,.52);
  font-weight:500;margin-bottom:20px;
}
.footer-col a,.footer-col p{
  display:block;font-size:14px;color:rgba(255,255,255,.76);padding:6px 0;line-height:1.7;
}
.footer-col a{position:relative;transition:color .24s var(--ease);}
.footer-col a:hover{color:var(--lime);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:24px 0 32px;
  display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.52);
}
.footer-bottom a{color:rgba(255,255,255,.66);}
.footer-bottom a:hover{color:var(--lime);}

/* ---------- 动效 ---------- */
.fade-up{opacity:0;transform:translateY(8px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.fade-up.in{opacity:1;transform:none;}

@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
  .fade-up{opacity:1;transform:none;}
}

/* ---------- 断点 ---------- */
@media screen and (max-width:1023px){
  body{font-size:16.5px;}
  .grid-container{padding-left:24px;padding-right:24px;}
  .section{padding:64px 0;}
  .section.tight{padding:48px 0;}
  .main-nav{display:none;}
  .hamburger{display:flex;}
  .nav-cta{display:none;}
  .header-inner{height:64px;}
  .hero{padding:40px 0 56px;}
  .hero-stats{gap:32px;margin-top:36px;}
  .hero-figure{margin-top:36px;}
  .group-sticky{position:static;margin-bottom:28px;}
  .topic-block{padding-bottom:40px;}
  .topic-block + .topic-block{padding-top:40px;}
  .footer-grid{padding-bottom:32px;}
  .footer-col{margin-top:32px;}
}
@media screen and (max-width:639px){
  .grid-container{padding-left:20px;padding-right:20px;}
  .section{padding:48px 0;}
  .hero-title{font-size:clamp(28px,8vw,38px);}
  .hero-sub{font-size:16px;}
  .hero-stats{gap:24px;}
  .hero-stat b{font-size:26px;}
  .item-row{gap:14px;}
  .item-num{min-width:30px;}
  .faq-a-inner{padding-right:0;}
  .faq-q{font-size:16px;padding:20px 0;}
  .tip-bar{padding:22px 20px;}
  .dark-band .facts{gap:24px;}
  .footer-bottom{flex-direction:column;}
}
@media screen and (min-width:1280px){
  .hero-title{letter-spacing:-.025em;}
}