/* roulang page: index */
:root{
  --ink:#0C1310;
  --ink-2:#16211C;
  --brand:#0E3B2E;
  --accent:#CBFF3C;
  --alert:#FF6A1F;
  --paper:#F6F5F0;
  --paper-2:#EDEBE4;
  --line:rgba(12,19,16,.10);
  --muted:rgba(12,19,16,.62);
  --radius:6px;
  --shadow-hover:0 12px 32px rgba(12,19,16,.10);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
html body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
.wrap{width:100%;max-width:1240px;margin:0 auto;padding-left:20px;padding-right:20px}
@media(min-width:768px){.wrap{padding-left:32px;padding-right:32px}}
.muted{color:var(--muted)}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.14em;font-weight:700;color:var(--muted);text-transform:uppercase}
.eyebrow::before{content:"";width:24px;height:2px;background:var(--accent);flex:none}
.h2{font-size:clamp(24px,2.6vw,40px);font-weight:700;line-height:1.2;letter-spacing:-.01em}
.h3{font-size:clamp(18px,1.5vw,22px);font-weight:600;line-height:1.35}
.lead{font-size:16px;line-height:1.85;color:rgba(12,19,16,.72);max-width:46em}
.hl{background:linear-gradient(transparent 68%,rgba(203,255,60,.85) 68%)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* header */
.site-header{position:fixed;top:0;left:0;right:0;z-index:60;background:transparent;border-bottom:1px solid transparent;transition:background .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease)}
.site-header.is-stuck{background:var(--paper);border-bottom-color:var(--line);box-shadow:0 8px 24px rgba(12,19,16,.06)}
.nav-bar{display:flex;align-items:center;justify-content:space-between;gap:16px;height:68px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:none}
.logo-mark{width:22px;height:22px;flex:none;display:block}
.logo-text{display:inline-flex;align-items:center;font-size:16px;white-space:nowrap}
.logo-main{font-weight:800;letter-spacing:-.01em}
.logo-sub{font-size:11px;letter-spacing:.14em;color:var(--muted);border-left:1px solid var(--line);padding-left:8px;margin-left:8px}
.nav-links{display:none;align-items:center;gap:2px}
@media(min-width:1024px){.nav-links{display:flex}}
.nav-link{position:relative;display:inline-block;padding:10px 12px;font-size:14px;font-weight:600;color:rgba(12,19,16,.7);transition:color .18s var(--ease)}
.nav-link::after{content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .18s var(--ease)}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--ink)}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:10px}
.search-btn{display:none;align-items:center;justify-content:center;width:40px;height:40px;border:1px solid var(--line);border-radius:4px;background:rgba(255,255,255,.7);cursor:pointer;transition:background .18s var(--ease),border-color .18s var(--ease)}
.search-btn:hover{background:var(--paper-2);border-color:rgba(12,19,16,.22)}
@media(min-width:1024px){.search-btn{display:inline-flex}}
.burger{display:inline-flex;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;padding:0 11px;background:rgba(255,255,255,.7);border:1px solid var(--line);border-radius:4px;cursor:pointer}
.burger span{display:block;height:1.5px;background:var(--ink);border-radius:2px}
@media(min-width:1024px){.burger{display:none}}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:4px;font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease)}
.btn-primary{background:var(--accent);color:var(--ink)}
.btn-primary:hover{background:var(--brand);color:var(--accent);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border-color:rgba(12,19,16,.26);color:var(--ink)}
.btn-ghost:hover{background:var(--ink);border-color:var(--ink);color:var(--paper);transform:translateY(-1px)}
.btn-sm{height:38px;padding:0 16px;font-size:13px}
.btn-block{width:100%}
.btn[disabled]{opacity:.4;pointer-events:none}

/* pills */
.pill{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;border:1px solid var(--line);background:#fff;font-size:12px;letter-spacing:.06em;color:rgba(12,19,16,.72);white-space:nowrap}
.pill-accent{background:var(--accent);border-color:var(--accent);color:var(--ink);font-weight:700}
.pill-dark{background:rgba(246,245,240,.10);border-color:rgba(246,245,240,.24);color:rgba(246,245,240,.86)}
.pill-alert{background:rgba(255,106,31,.12);border-color:rgba(255,106,31,.24);color:#C24A0B;font-weight:700}

/* hero */
.hero{padding-top:112px;padding-bottom:56px;overflow:hidden;position:relative}
@media(min-width:1024px){.hero{padding-top:136px;padding-bottom:80px}}
.hero-grid{display:grid;gap:32px}
@media(min-width:1024px){.hero-grid{grid-template-columns:7fr 5fr;gap:48px;align-items:center;min-height:560px}}
.hero-title{font-size:clamp(32px,5vw,60px);font-weight:800;line-height:1.08;letter-spacing:-.02em;margin-top:18px;max-width:15em}
.hero-sub{margin-top:20px;font-size:16px;line-height:1.85;color:rgba(12,19,16,.72);max-width:38em}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.metric-row{display:flex;flex-wrap:wrap;gap:22px;margin-top:40px}
.metric{display:flex;flex-direction:column;gap:2px}
.metric b{font-size:28px;font-weight:800;line-height:1.1;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.metric span{font-size:12px;color:var(--muted)}
.metric+.metric{border-left:1px solid var(--line);padding-left:22px}
.hero-visual{position:relative;border-radius:var(--radius);overflow:hidden;background:var(--paper-2);aspect-ratio:4/3}
@media(min-width:1024px){.hero-visual{aspect-ratio:auto;height:540px}}
.hero-visual img{width:100%;height:100%;object-fit:cover}
.hero-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(12,19,16,.30) 0%,rgba(12,19,16,.05) 52%,rgba(12,19,16,.44) 100%);pointer-events:none}
.hero-tag{position:absolute;left:20px;bottom:20px;z-index:2;display:inline-flex;align-items:center;gap:10px;padding:8px 14px;border-radius:999px;background:rgba(12,19,16,.72);color:var(--accent);font-size:12px;letter-spacing:.12em;font-weight:700}
.hero-tag i{display:block;width:16px;height:2px;background:var(--accent);transform:rotate(-32deg)}

/* section rhythm */
.section{padding-top:64px;padding-bottom:64px}
@media(min-width:768px){.section{padding-top:96px;padding-bottom:96px}}
.section-tight{padding-top:40px;padding-bottom:40px}
@media(min-width:768px){.section-tight{padding-top:48px;padding-bottom:48px}}
.section-head{display:flex;flex-wrap:wrap;gap:16px;align-items:flex-end;justify-content:space-between;margin-bottom:40px}
.link-more{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--brand)}
.link-more svg{transition:transform .18s var(--ease)}
.link-more:hover svg{transform:translateX(4px)}

/* steps */
.steps{display:grid;gap:28px;margin-top:8px}
@media(min-width:768px){.steps{grid-template-columns:repeat(3,1fr);gap:32px}}
.step{border-top:1px solid var(--line);padding-top:20px;position:relative}
.step-num{font-size:clamp(34px,4vw,48px);font-weight:800;line-height:1;color:var(--brand);font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.step h3{margin-top:12px;font-size:18px;font-weight:600}
.step p{margin-top:8px;font-size:15px;line-height:1.8;color:var(--muted)}

/* stairs */
.stairs{display:grid;gap:20px;margin-top:8px}
@media(min-width:1024px){.stairs{grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}}
.stair{border-radius:var(--radius);border:1px solid var(--line);background:#fff;padding:28px 24px 26px;transition:box-shadow .18s var(--ease),transform .18s var(--ease)}
.stair:hover{box-shadow:var(--shadow-hover);transform:translateY(-4px)}
.stair.dark{background:var(--ink);border-color:var(--ink);color:var(--paper)}
@media(min-width:1024px){
  .stair:nth-child(1){margin-top:48px}
  .stair:nth-child(2){margin-top:24px}
}
.stair-num{font-size:44px;font-weight:800;line-height:1;color:var(--brand);font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.stair.dark .stair-num{color:var(--accent)}
.stair h3{margin-top:14px;font-size:18px;font-weight:600}
.stair p{margin-top:8px;font-size:15px;line-height:1.8;color:var(--muted)}
.stair.dark p{color:rgba(246,245,240,.72)}
.stair .pill{margin-top:18px}

/* plans */
.plans{border-top:1px solid var(--line);margin-top:8px}
.plan-row{display:grid;gap:16px;padding:26px 18px;border-bottom:1px solid var(--line);transition:background .18s var(--ease),transform .18s var(--ease)}
.plan-row:hover{background:var(--paper-2);transform:translateX(4px)}
@media(min-width:1024px){
  .plan-row{grid-template-columns:1.05fr 1.5fr .95fr;gap:28px;align-items:center;padding:30px 24px}
}
.plan-row.is-featured{border-left:4px solid var(--accent);background:rgba(203,255,60,.08)}
.plan-name{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:19px;font-weight:700}
.plan-name span.desc{display:block;width:100%;font-size:14px;font-weight:400;color:var(--muted);margin-top:6px}
.plan-points{display:flex;flex-wrap:wrap;gap:8px}
.plan-price{text-align:left}
@media(min-width:1024px){.plan-price{text-align:right}}
.price{display:block;font-size:clamp(30px,3.4vw,44px);font-weight:800;line-height:1.05;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.price small{font-size:14px;font-weight:600;color:var(--muted);margin-left:4px}
.discount{display:block;margin-top:4px;font-size:13px;font-weight:700;color:var(--alert)}
.plan-price .btn{margin-top:14px}

/* dark strip */
.strip{background:var(--ink);color:var(--paper);border-radius:var(--radius);padding:30px 22px;display:grid;gap:24px}
@media(min-width:1024px){.strip{grid-template-columns:auto 1fr auto;align-items:center;gap:44px;padding:38px 44px}}
.countdown{display:flex;align-items:baseline;gap:6px;font-variant-numeric:tabular-nums}
.countdown b{font-size:clamp(40px,7vw,72px);font-weight:800;line-height:1;color:var(--accent);letter-spacing:-.02em}
.countdown em{font-style:normal;font-size:clamp(22px,3vw,36px);font-weight:700;color:rgba(203,255,60,.6)}
@media(prefers-reduced-motion:no-preference){
  .countdown b{animation:breathe 3.4s ease-in-out infinite}
  .countdown b:nth-child(3){animation-delay:.4s}
}
@keyframes breathe{0%,100%{opacity:1}50%{opacity:.72}}
.strip-text h3{font-size:clamp(18px,2vw,24px);font-weight:700}
.strip-text p{margin-top:8px;font-size:15px;line-height:1.8;color:rgba(246,245,240,.7);max-width:44em}

/* news */
.news-grid{display:grid;gap:20px}
@media(min-width:1024px){.news-grid{grid-template-columns:1.25fr 1fr;gap:24px;align-items:start}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:box-shadow .18s var(--ease),transform .18s var(--ease)}
.card:hover{box-shadow:var(--shadow-hover);transform:translateY(-4px)}
.card-img{aspect-ratio:16/9;overflow:hidden;background:var(--paper-2)}
.card-img img{width:100%;height:100%;object-fit:cover;transition:transform .18s var(--ease)}
.card:hover .card-img img{transform:scale(1.03)}
.card-body{padding:20px}
.card-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:12px;color:var(--muted)}
.card-title{margin-top:12px;font-size:20px;font-weight:700;line-height:1.4}
.card-title a{display:inline;background-image:linear-gradient(var(--ink),var(--ink));background-size:0% 1px;background-position:0 100%;background-repeat:no-repeat;transition:background-size .18s var(--ease)}
.card-title a:hover{background-size:100% 1px}
.card-excerpt{margin-top:10px;font-size:15px;line-height:1.8;color:var(--muted)}
.news-side{display:grid;gap:16px}
.news-mini{display:grid;grid-template-columns:112px 1fr;gap:16px;align-items:center;padding:12px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);transition:box-shadow .18s var(--ease),transform .18s var(--ease),background .18s var(--ease)}
.news-mini:hover{box-shadow:var(--shadow-hover);transform:translateY(-4px);background:#fff}
.news-mini .thumb{aspect-ratio:16/9;border-radius:4px;overflow:hidden;background:var(--paper-2)}
.news-mini .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .18s var(--ease)}
.news-mini:hover .thumb img{transform:scale(1.03)}
.news-mini h3{font-size:16px;font-weight:600;line-height:1.5}
.news-mini .meta{margin-top:6px;font-size:12px;color:var(--muted)}
.news-empty{grid-column:1/-1;display:flex;flex-direction:column;align-items:center;gap:10px;padding:48px 20px;border:1px dashed var(--line);border-radius:var(--radius);background:#fff;text-align:center;color:var(--muted)}

/* table */
.table-scroll{overflow-x:auto;-ms-overflow-style:none;scrollbar-width:none}
.table-scroll::-webkit-scrollbar{display:none}
.rank-table{width:100%;border-collapse:collapse;min-width:620px;font-size:15px}
.rank-table th{text-align:left;padding:12px 16px;font-size:12px;letter-spacing:.1em;font-weight:700;color:var(--muted);border-bottom:1px solid var(--line);white-space:nowrap}
.rank-table td{padding:18px 16px;border-bottom:1px solid var(--line);vertical-align:middle}
.rank-table tbody tr{transition:background .18s var(--ease)}
.rank-table tbody tr:hover{background:var(--paper-2)}
.rank-num{font-weight:800;font-size:17px;color:var(--brand);font-variant-numeric:tabular-nums}
.rank-scene{font-weight:600}

/* faq */
.faq-layout{display:grid;gap:32px}
@media(min-width:1024px){.faq-layout{grid-template-columns:4fr 8fr;gap:56px;align-items:start}}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{position:relative;width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:18px 0;background:none;border:0;text-align:left;font-size:16px;font-weight:600;line-height:1.6;cursor:pointer}
.faq-q::before{content:"";position:absolute;left:-14px;top:14px;bottom:14px;width:3px;background:var(--accent);opacity:0;transition:opacity .18s var(--ease)}
.faq-item.is-open .faq-q::before{opacity:1}
.faq-arrow{flex:none;width:9px;height:9px;border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);transform:rotate(45deg);margin-top:-4px;transition:transform .2s var(--ease),margin .2s var(--ease)}
.faq-item.is-open .faq-arrow{transform:rotate(-135deg);margin-top:4px}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .24s var(--ease)}
.faq-item.is-open .faq-a{grid-template-rows:1fr}
.faq-a>div{overflow:hidden}
.faq-a p{padding-bottom:20px;font-size:15px;line-height:1.8;color:var(--muted)}

/* form */
.contact-layout{display:grid;gap:32px}
@media(min-width:1024px){.contact-layout{grid-template-columns:5fr 7fr;gap:48px;align-items:start}}
.point-list{margin-top:24px;display:grid;gap:12px}
.point-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:rgba(12,19,16,.78)}
.point-list li::before{content:"";flex:none;width:6px;height:6px;margin-top:10px;background:var(--brand)}
.contact-info{margin-top:28px;border-top:1px solid var(--line);padding-top:20px;display:grid;gap:10px;font-size:14px;color:var(--muted)}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px}
@media(min-width:768px){.form-card{padding:32px}}
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}
.field label{font-size:13px;font-weight:600}
.field input,.field select,.field textarea{width:100%;height:48px;padding:0 14px;border:1px solid var(--line);border-radius:4px;background:#fff;font-size:15px;outline:none;transition:border-color .18s var(--ease),box-shadow .18s var(--ease)}
.field textarea{height:auto;min-height:120px;padding:12px 14px;line-height:1.7;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand);box-shadow:0 0 0 2px rgba(203,255,60,.55)}
.form-note{margin-top:14px;font-size:13px;color:var(--muted)}
.form-status{margin-top:14px;font-size:14px;font-weight:600;color:var(--brand);display:none}
.form-status.is-on{display:block}

/* footer */
.site-footer{margin-top:96px;background:var(--ink);color:rgba(246,245,240,.72);padding:56px 0 28px}
@media(min-width:768px){.site-footer{padding-top:72px}}
.footer-grid{display:grid;gap:32px}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr);gap:36px}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}}
.footer-brand .logo-main,.footer-brand .logo-sub{color:var(--paper)}
.footer-brand .logo-sub{border-left-color:rgba(246,245,240,.24)}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(246,245,240,.62);max-width:26em}
.footer-links{margin-top:18px;display:grid;gap:8px}
.footer-links a{font-size:14px;color:rgba(246,245,240,.72);width:fit-content;transition:color .18s var(--ease)}
.footer-links a:hover{color:var(--accent)}
.footer-col h4{font-size:13px;letter-spacing:.1em;font-weight:700;color:var(--paper);margin-bottom:16px}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:rgba(246,245,240,.7);transition:color .18s var(--ease)}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{margin-top:44px;border-top:1px solid rgba(246,245,240,.14);padding-top:20px;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:12.5px;color:rgba(246,245,240,.5)}

/* drawer */
.drawer{position:fixed;inset:0;z-index:90;background:var(--paper);padding:18px 20px 28px;display:flex;flex-direction:column;transform:translateX(100%);transition:transform .24s var(--ease);visibility:hidden}
.drawer.is-open{transform:translateX(0);visibility:visible}
.drawer-head{display:flex;align-items:center;justify-content:space-between;height:56px}
.drawer-close{width:40px;height:40px;border:1px solid var(--line);border-radius:4px;background:#fff;cursor:pointer;font-size:20px;line-height:1}
.drawer-links{margin-top:16px;border-top:1px solid var(--line)}
.drawer-links a{display:flex;align-items:center;justify-content:space-between;height:56px;font-size:20px;font-weight:600;border-bottom:1px solid var(--line)}
.drawer-links a span{font-size:13px;font-weight:500;color:var(--muted)}
.drawer-cta{margin-top:auto}
body.is-locked{overflow:hidden}
@media(min-width:1024px){.drawer{display:none}}

/* motion */
.js .fade-up{opacity:0;transform:translateY(24px);transition:opacity .42s var(--ease),transform .42s var(--ease)}
.js .fade-up.is-in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .js .fade-up{opacity:1;transform:none;transition:none}
  .countdown b{animation:none}
  html{scroll-behavior:auto}
}

/* roulang page: category1 */
:root{
  --ink:#0C1310;
  --ink-2:#16211C;
  --brand:#0E3B2E;
  --accent:#CBFF3C;
  --alert:#FF6A1F;
  --paper:#F6F5F0;
  --paper-2:#EDEBE4;
  --line:rgba(12,19,16,.10);
  --line-strong:rgba(12,19,16,.18);
  --shadow:0 12px 32px rgba(12,19,16,.10);
  --nav-h:72px;
  --radius:6px;
  --radius-sm:4px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--paper);
  color:var(--ink);
  font-size:16px;
  line-height:1.85;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius)}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
.wrap{max-width:1240px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.wrap{padding:0 32px}}

/* ============ 通用排版 ============ */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;letter-spacing:.14em;color:var(--brand);font-weight:600;
  text-transform:none;
}
.eyebrow::before{content:"";width:24px;height:2px;background:var(--accent);display:block}
.h1{font-size:clamp(30px,4.4vw,46px);font-weight:800;line-height:1.12;letter-spacing:-.02em}
.h2{font-size:clamp(24px,3.2vw,36px);font-weight:700;line-height:1.22;letter-spacing:-.015em}
.h3{font-size:clamp(17px,2vw,21px);font-weight:600;line-height:1.4}
.lead{font-size:17px;color:rgba(12,19,16,.72);line-height:1.85;max-width:46ch}
.muted{color:rgba(12,19,16,.62)}
.section{padding:64px 0}
@media(min-width:768px){.section{padding:96px 0}}
.section-sm{padding:40px 0}
@media(min-width:768px){.section-sm{padding:56px 0}}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:36px}
.section-head .h2{max-width:22ch}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:background-color .18s cubic-bezier(.2,.7,.3,1),color .18s cubic-bezier(.2,.7,.3,1),transform .18s cubic-bezier(.2,.7,.3,1),border-color .18s;
  border:1px solid transparent;white-space:nowrap;
}
.btn-primary{background:var(--accent);color:var(--ink)}
.btn-primary:hover{background:var(--brand);color:var(--accent);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{border-color:var(--line-strong);color:var(--ink);background:transparent}
.btn-ghost:hover{border-color:var(--brand);background:var(--paper-2);transform:translateY(-1px)}
.btn-dark{background:var(--ink);color:var(--paper)}
.btn-dark:hover{background:var(--brand);color:var(--accent);transform:translateY(-1px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none}

/* ============ 标签 ============ */
.pill{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:999px;font-size:12px;letter-spacing:.06em;
  background:var(--paper-2);border:1px solid var(--line);color:rgba(12,19,16,.78);
}
.pill-accent{background:var(--accent);border-color:transparent;color:var(--ink);font-weight:600}
.pill-dark{background:var(--ink);border-color:transparent;color:var(--paper)}
.pill-alert{background:transparent;border-color:rgba(255,106,31,.4);color:var(--alert);font-weight:600}

/* ============ 导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:var(--nav-h);
  background:transparent;
  transition:background-color .22s ease,box-shadow .22s ease,border-color .22s ease;
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:var(--paper);
  border-bottom-color:var(--line);
  box-shadow:0 8px 24px rgba(12,19,16,.06);
}
.nav-bar{display:flex;align-items:center;justify-content:space-between;height:var(--nav-h);gap:24px}
.logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{display:inline-flex;align-items:center;justify-content:center}
.logo-text{display:inline-flex;align-items:center}
.logo-main{font-size:17px;font-weight:800;letter-spacing:-.01em}
.logo-sub{
  font-size:12px;letter-spacing:.06em;color:rgba(12,19,16,.6);
  padding-left:10px;margin-left:10px;border-left:1px solid var(--line-strong);
}
.nav-links{display:none;align-items:center;gap:4px;flex:1;justify-content:flex-start;margin-left:16px}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:40px;
  padding:0 12px;font-size:14.5px;color:rgba(12,19,16,.78);
  transition:color .18s ease;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left center;
  transition:transform .18s cubic-bezier(.2,.7,.3,1);
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--ink);font-weight:600}
.nav-right{display:flex;align-items:center;gap:10px;flex-shrink:0}
.search-btn{
  display:none;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:var(--radius-sm);
  border:1px solid var(--line);transition:background-color .18s,border-color .18s;
}
.search-btn:hover{background:var(--paper-2);border-color:var(--line-strong)}
.burger{
  display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;padding:0 10px;border-radius:var(--radius-sm);
}
.burger span{display:block;height:1.6px;background:var(--ink);width:100%;transition:transform .2s ease,opacity .2s ease}
.burger.is-open span:nth-child(1){transform:translateY(6.6px) rotate(45deg)}
.burger.is-open span:nth-child(2){opacity:0}
.burger.is-open span:nth-child(3){transform:translateY(-6.6px) rotate(-45deg)}
@media(min-width:1024px){
  .nav-links{display:flex}
  .search-btn{display:inline-flex}
  .burger{display:none}
}
@media(max-width:1023px){
  :root{--nav-h:64px}
}

/* 移动抽屉 */
.drawer{
  position:fixed;inset:0;z-index:200;background:var(--paper);
  padding:calc(var(--nav-h) + 16px) 24px 32px;
  display:flex;flex-direction:column;
  transform:translateX(100%);visibility:hidden;
  transition:transform .26s cubic-bezier(.2,.7,.3,1),visibility .26s;
}
.drawer.is-open{transform:translateX(0);visibility:visible}
.drawer-nav{flex:1;display:flex;flex-direction:column}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  font-size:20px;font-weight:600;line-height:56px;
  border-bottom:1px solid var(--line);
}
.drawer-nav a span.arrow{font-size:14px;color:rgba(12,19,16,.4)}
.drawer-nav a.is-active{color:var(--brand)}
.drawer-cta{padding-top:24px;display:flex;flex-direction:column;gap:12px}
.drawer-meta{font-size:13px;color:rgba(12,19,16,.55);padding-top:16px}

/* ============ 面包屑 ============ */
.crumb{padding-top:calc(var(--nav-h) + 24px);font-size:13.5px;color:rgba(12,19,16,.6);display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:rgba(12,19,16,.3)}
.crumb .current{color:var(--ink);font-weight:600}

/* ============ 页头 ============ */
.page-head{padding:28px 0 0}
.page-head .inner{display:grid;gap:32px;align-items:start}
@media(min-width:1024px){
  .page-head .inner{grid-template-columns:7fr 5fr;gap:48px}
}
.page-head .lead{margin-top:18px;max-width:44ch}
.page-head .h1{margin-top:16px}
.page-head .actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.page-media{position:relative;overflow:hidden;border-radius:var(--radius);background:var(--paper-2)}
.page-media img{width:100%;height:230px;object-fit:cover}
@media(min-width:768px){.page-media img{height:280px}}
@media(min-width:1024px){.page-media img{height:320px}}
.page-media .tagline{
  position:absolute;left:16px;bottom:16px;
  background:rgba(12,19,16,.82);color:var(--paper);
  font-size:12.5px;letter-spacing:.04em;padding:6px 12px;border-radius:999px;
}
.metrics{display:flex;flex-wrap:wrap;gap:20px;margin-top:32px;padding-top:24px;border-top:1px solid var(--line)}
.metric{flex:1 1 120px;min-width:110px}
.metric .num{
  font-size:clamp(28px,4vw,40px);font-weight:800;line-height:1;letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;
}
.metric .num em{font-style:normal;font-size:14px;font-weight:600;margin-left:4px;color:rgba(12,19,16,.55);letter-spacing:0}
.metric .desc{font-size:12.5px;color:rgba(12,19,16,.6);margin-top:8px;letter-spacing:.02em}
.metric + .metric{border-left:1px solid var(--line);padding-left:20px}

/* ============ 页内锚点导航 ============ */
.anchor-nav{
  position:sticky;top:var(--nav-h);z-index:60;
  background:rgba(246,245,240,.94);
  backdrop-filter:blur(6px);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  margin-top:48px;
}
.anchor-nav .inner{display:flex;gap:6px;overflow-x:auto;padding:10px 0;scrollbar-width:none}
.anchor-nav .inner::-webkit-scrollbar{display:none}
.anchor-nav a{
  display:inline-flex;align-items:center;height:34px;padding:0 14px;border-radius:999px;
  font-size:13.5px;color:rgba(12,19,16,.72);white-space:nowrap;
  border:1px solid transparent;transition:background-color .18s,border-color .18s,color .18s;
}
.anchor-nav a:hover{background:var(--paper-2);border-color:var(--line);color:var(--ink)}

/* ============ 步骤条 ============ */
.steps{display:grid;gap:20px}
@media(min-width:768px){.steps{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.steps{grid-template-columns:repeat(4,1fr);gap:24px}}
.step{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 22px 24px;position:relative;
  transition:transform .18s cubic-bezier(.2,.7,.3,1),box-shadow .18s,border-color .18s;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.step .idx{
  font-size:clamp(36px,5vw,52px);font-weight:800;line-height:1;letter-spacing:-.03em;
  font-variant-numeric:tabular-nums;color:var(--brand);
}
.step .idx::after{content:"";display:block;width:28px;height:2px;background:var(--accent);margin-top:12px}
.step h3{margin-top:16px;font-size:18px;font-weight:600}
.step p{margin-top:10px;font-size:14.5px;color:rgba(12,19,16,.68);line-height:1.8}
.step .pill{margin-top:16px}
.step.is-dark{background:var(--ink);border-color:var(--ink)}
.step.is-dark .idx{color:var(--accent)}
.step.is-dark h3{color:var(--paper)}
.step.is-dark p{color:rgba(246,245,240,.72)}
.step.is-dark .pill{background:rgba(246,245,240,.1);border-color:rgba(246,245,240,.2);color:rgba(246,245,240,.85)}

/* ============ 双卡 ============ */
.duo{display:grid;gap:20px}
@media(min-width:1024px){.duo{grid-template-columns:8fr 4fr;gap:24px}}
.card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 26px;
  transition:transform .18s cubic-bezier(.2,.7,.3,1),box-shadow .18s;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.card-soft{background:var(--paper-2)}
.card h3{font-size:19px;font-weight:700}
.card .card-sub{font-size:14px;color:rgba(12,19,16,.62);margin-top:8px}

/* 有序排查列表 */
.check-list{margin-top:20px;border-top:1px solid var(--line)}
.check-list li{
  display:grid;grid-template-columns:34px 1fr;gap:14px;
  padding:16px 0;border-bottom:1px solid var(--line);
}
.check-list .no{
  font-size:15px;font-weight:800;color:var(--brand);
  font-variant-numeric:tabular-nums;line-height:1.7;
}
.check-list .txt strong{display:block;font-size:15.5px;font-weight:600}
.check-list .txt span{display:block;font-size:14px;color:rgba(12,19,16,.64);margin-top:4px}

/* 方点列表 */
.dot-list{margin-top:18px;display:grid;gap:12px}
.dot-list li{display:flex;gap:10px;font-size:14.5px;color:rgba(12,19,16,.72);line-height:1.75}
.dot-list li::before{content:"";flex:0 0 auto;width:5px;height:5px;background:var(--brand);margin-top:10px}

/* ============ 时间线 ============ */
.timeline-wrap{display:grid;gap:28px}
@media(min-width:1024px){.timeline-wrap{grid-template-columns:7fr 5fr;gap:48px;align-items:center}}
.timeline{position:relative;padding-left:26px}
.timeline::before{content:"";position:absolute;left:5px;top:8px;bottom:8px;width:1px;background:var(--line-strong)}
.timeline li{position:relative;padding:0 0 26px 0}
.timeline li:last-child{padding-bottom:0}
.timeline li::before{
  content:"";position:absolute;left:-26px;top:8px;width:11px;height:11px;border-radius:50%;
  background:var(--paper);border:2px solid var(--brand);
}
.timeline li:first-child::before{background:var(--accent);border-color:var(--accent)}
.timeline h4{font-size:16.5px;font-weight:600}
.timeline p{font-size:14.5px;color:rgba(12,19,16,.66);margin-top:6px;line-height:1.8}
.figure-block{border-radius:var(--radius);overflow:hidden;background:var(--paper-2)}
.figure-block img{width:100%;height:300px;object-fit:cover}

/* ============ FAQ ============ */
.faq-layout{display:grid;gap:28px}
@media(min-width:1024px){.faq-layout{grid-template-columns:4fr 8fr;gap:56px;align-items:start}}
.faq-side p{margin-top:16px;font-size:15px;color:rgba(12,19,16,.66);max-width:30ch}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line);position:relative}
.faq-item::before{
  content:"";position:absolute;left:-16px;top:14px;bottom:14px;width:3px;
  background:var(--accent);opacity:0;transition:opacity .18s ease;
}
.faq-item.is-open::before{opacity:1}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  text-align:left;padding:18px 0;min-height:58px;
  font-size:16px;font-weight:600;line-height:1.5;
}
.faq-arrow{
  flex:0 0 auto;width:10px;height:10px;border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);
  transform:rotate(45deg);transition:transform .2s cubic-bezier(.2,.7,.3,1);
}
.faq-item.is-open .faq-arrow{transform:rotate(-135deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s cubic-bezier(.2,.7,.3,1)}
.faq-a p{font-size:15px;line-height:1.85;color:rgba(12,19,16,.7);padding:0 24px 20px 0}

/* ============ CTA 条 ============ */
.cta-band{
  background:var(--ink);color:var(--paper);border-radius:var(--radius);
  padding:36px 28px;
  display:grid;gap:22px;align-items:center;
}
@media(min-width:1024px){.cta-band{grid-template-columns:7fr 5fr;padding:44px 44px}}
.cta-band h2{font-size:clamp(22px,2.8vw,30px);font-weight:700;line-height:1.3;color:var(--paper)}
.cta-band p{margin-top:12px;font-size:15px;color:rgba(246,245,240,.72);max-width:40ch}
.cta-band .cta-actions{display:flex;flex-wrap:wrap;gap:12px}
@media(min-width:1024px){.cta-band .cta-actions{justify-content:flex-end}}
.cta-band .btn-ghost{border-color:rgba(246,245,240,.3);color:var(--paper)}
.cta-band .btn-ghost:hover{background:rgba(246,245,240,.1);border-color:rgba(246,245,240,.55)}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:var(--paper);margin-top:64px;padding:56px 0 28px}
@media(min-width:768px){.site-footer{padding:72px 0 32px}}
.footer-grid{display:grid;gap:36px}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.footer-grid{grid-template-columns:5fr 3fr 2fr 3fr;gap:32px}}
.site-footer .logo-main{color:var(--paper)}
.site-footer .logo-sub{color:rgba(246,245,240,.6);border-left-color:rgba(246,245,240,.22)}
.footer-brand p{margin-top:18px;font-size:14px;color:rgba(246,245,240,.68);max-width:34ch}
.footer-links{display:flex;flex-wrap:wrap;gap:8px 16px;margin-top:20px}
.footer-links a{font-size:13.5px;color:rgba(246,245,240,.72);border-bottom:1px solid rgba(246,245,240,.2);padding-bottom:2px}
.footer-links a:hover{color:var(--accent);border-color:var(--accent)}
.footer-col h4{font-size:13px;letter-spacing:.14em;color:rgba(246,245,240,.5);font-weight:600}
.footer-col ul{margin-top:16px;display:grid;gap:12px}
.footer-col a,.footer-col span{font-size:14px;color:rgba(246,245,240,.78)}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(246,245,240,.14);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:12.5px;color:rgba(246,245,240,.5);
}

/* ============ 动效与焦点 ============ */
.fade-up{opacity:0;transform:translateY(24px);transition:opacity .42s cubic-bezier(.2,.7,.3,1),transform .42s cubic-bezier(.2,.7,.3,1)}
.fade-up.is-in{opacity:1;transform:none}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--accent);outline-offset:2px;border-radius:2px;
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.001ms!important}
  .fade-up{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: article */
:root{
  --ink:#0C1310;
  --ink-2:#16211C;
  --brand:#0E3B2E;
  --accent:#CBFF3C;
  --alert:#FF6A1F;
  --paper:#F6F5F0;
  --paper-2:#EDEBE4;
  --line:rgba(12,19,16,.10);
  --shadow:0 12px 32px rgba(12,19,16,.10);
  --nav-h:68px;
  --radius:6px;
  --f-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body.site-body{
  margin:0;
  font-family:var(--f-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.is-locked{overflow:hidden}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:3px}

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

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  border-bottom:1px solid transparent;
  background:transparent;
  transition:background .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.site-header.is-scrolled{
  background:var(--paper);
  border-bottom-color:var(--line);
  box-shadow:0 8px 24px rgba(12,19,16,.06);
}
.nav-bar{height:var(--nav-h);display:flex;align-items:center;justify-content:space-between;gap:20px}
.logo{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.logo-mark{display:inline-flex;width:22px;height:22px;flex:0 0 22px}
.logo-text{display:inline-flex;align-items:baseline;gap:8px;white-space:nowrap}
.logo-main{font-size:18px;font-weight:800;letter-spacing:-.01em;color:var(--ink)}
.logo-sub{font-size:12px;font-weight:600;letter-spacing:.06em;color:rgba(12,19,16,.6);padding-left:9px;border-left:1px solid var(--line)}
.nav-links{display:none}
@media (min-width:1024px){
  .nav-links{display:flex;align-items:center;gap:24px}
}
.nav-link{
  position:relative;display:inline-block;padding:6px 0;
  font-size:14px;font-weight:600;color:rgba(12,19,16,.76);text-decoration:none;
  transition:color .18s ease;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--accent);
  transition:width .18s cubic-bezier(.2,.7,.3,1);
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--ink)}
.nav-link.is-active::after{width:100%}
.nav-right{display:flex;align-items:center;gap:10px}
.search-btn{
  display:none;width:38px;height:38px;border-radius:999px;
  border:1px solid var(--line);background:transparent;cursor:pointer;
  align-items:center;justify-content:center;
  transition:background .18s ease,transform .18s ease;
}
.search-btn:hover{background:var(--paper-2);transform:translateY(-1px)}
@media (min-width:1024px){.search-btn{display:inline-flex}}
.burger{
  width:40px;height:40px;border:1px solid var(--line);border-radius:4px;background:transparent;
  display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer;
  transition:background .18s ease;
}
.burger:hover{background:var(--paper-2)}
.burger span{display:block;width:18px;height:2px;background:var(--ink)}
@media (min-width:1024px){.burger{display:none}}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:4px;border:1px solid transparent;
  font-size:15px;font-weight:600;text-decoration:none;cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s cubic-bezier(.2,.7,.3,1);
}
.btn-primary{background:var(--accent);color:var(--ink)}
.btn-primary:hover{background:var(--brand);color:var(--accent);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{background:transparent;border-color:rgba(12,19,16,.24);color:var(--ink)}
.btn-outline:hover{background:var(--ink);color:var(--paper);transform:translateY(-1px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-ghost{height:auto;padding:0;background:transparent;color:var(--ink);border-radius:0}
.btn-ghost:hover{color:var(--brand)}
.btn:disabled{opacity:.4;pointer-events:none}

/* ---------- drawer ---------- */
.drawer{
  position:fixed;inset:0;z-index:90;background:#fff;
  display:flex;flex-direction:column;padding:20px 20px 24px;
  transform:translateY(-101%);transition:transform .28s cubic-bezier(.2,.7,.3,1);
  overflow-y:auto;
}
.drawer.is-open{transform:translateY(0)}
.drawer-top{display:flex;align-items:center;justify-content:space-between;min-height:56px}
.drawer-close{
  width:40px;height:40px;border:1px solid var(--line);border-radius:4px;background:transparent;
  display:inline-flex;align-items:center;justify-content:center;cursor:pointer;
}
.drawer-nav{display:flex;flex-direction:column;margin-top:12px}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  height:56px;font-size:20px;font-weight:600;color:var(--ink);text-decoration:none;
  border-bottom:1px solid var(--line);
}
.drawer-link:hover{color:var(--brand)}
.drawer-foot{margin-top:auto;padding-top:24px}

/* ---------- breadcrumb & article head ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding-top:calc(var(--nav-h) + 32px);
  font-size:14px;color:rgba(12,19,16,.6);
}
.breadcrumb a{color:rgba(12,19,16,.6);text-decoration:none;transition:color .18s ease}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{opacity:.5}
.breadcrumb .current{
  font-weight:600;color:var(--ink);max-width:100%;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.article-hero{padding-bottom:8px;border-bottom:1px solid var(--line);margin-top:24px}
.article-head{padding:20px 0 32px;max-width:860px}
.article-head h1{
  font-size:clamp(24px,3.4vw,38px);line-height:1.25;font-weight:800;letter-spacing:-.02em;
  color:var(--ink);margin-top:16px;
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:18px;font-size:14px;color:rgba(12,19,16,.62)}
.meta-row .vline{width:1px;height:14px;background:var(--line)}
.pill{
  display:inline-flex;align-items:center;height:24px;padding:0 12px;border-radius:999px;
  font-size:12px;letter-spacing:.06em;background:var(--paper-2);
  border:1px solid var(--line);color:var(--ink);white-space:nowrap;
}
.pill-accent{background:var(--accent);border-color:transparent;font-weight:600}
.article-cover{margin-top:28px;border-radius:var(--radius);overflow:hidden;background:var(--paper-2)}
.article-cover img{width:100%;height:clamp(200px,30vw,360px);object-fit:cover}

/* ---------- article layout ---------- */
.article-main{padding:48px 0 24px}
.article-layout{display:grid;grid-template-columns:1fr;gap:48px}
@media (min-width:1024px){
  .article-layout{grid-template-columns:minmax(0,1fr) 280px;gap:56px;align-items:start}
}
.article-body{
  max-width:760px;
  font-size:16px;line-height:1.9;color:rgba(12,19,16,.86);
}
.article-body p{margin:0 0 20px}
.article-body h2{
  position:relative;font-size:26px;font-weight:700;line-height:1.35;
  color:var(--ink);margin:40px 0 16px;padding-left:16px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:4px;
  background:var(--accent);border-radius:2px;
}
.article-body h3{font-size:20px;font-weight:600;line-height:1.5;color:var(--ink);margin:32px 0 12px}
.article-body ul{list-style:none;padding-left:0;margin:0 0 20px}
.article-body ul li{position:relative;padding-left:18px;margin-bottom:10px}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:.72em;width:5px;height:5px;
  background:var(--brand);border-radius:1px;
}
.article-body ol{padding-left:24px;margin:0 0 20px}
.article-body ol li{margin-bottom:10px}
.article-body ol li::marker{color:var(--brand);font-weight:700}
.article-body blockquote{
  margin:24px 0;padding:18px 20px;background:var(--paper-2);
  border-left:4px solid var(--brand);border-radius:4px;color:rgba(12,19,16,.8);
}
.article-body figure{margin:24px 0}
.article-body img{width:100%;border-radius:var(--radius);background:var(--paper-2);margin:0}
.article-body figcaption{font-size:13px;color:rgba(12,19,16,.55);margin-top:8px;text-align:center}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px}
.article-body th,.article-body td{border-bottom:1px solid var(--line);padding:12px 10px;text-align:left}
.article-body thead th{border-bottom:1px solid rgba(12,19,16,.18);font-weight:600;color:var(--ink);background:transparent}
.article-body tbody tr{transition:background .18s ease}
.article-body tbody tr:hover{background:var(--paper-2)}
.article-body a{color:var(--brand);text-decoration:underline;text-decoration-color:rgba(14,59,46,.32);text-underline-offset:3px}
.article-body a:hover{text-decoration-color:var(--brand)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0}
.empty-state{
  max-width:760px;border:1px solid var(--line);border-radius:var(--radius);
  background:#fff;padding:40px 28px;text-align:center;
}
.empty-state h2{font-size:22px;font-weight:700;color:var(--ink)}
.empty-state p{font-size:15px;color:rgba(12,19,16,.68);margin:12px auto 22px;max-width:520px}

/* ---------- sidebar ---------- */
.side-sticky{display:flex;flex-direction:column;gap:20px}
@media (min-width:1024px){.side-sticky{position:sticky;top:calc(var(--nav-h) + 24px)}}
.side-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.side-card h3{
  font-size:12px;font-weight:600;letter-spacing:.14em;color:rgba(12,19,16,.55);
  text-transform:uppercase;margin-bottom:10px;
}
.side-list{display:flex;flex-direction:column}
.side-list a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 0;font-size:14px;font-weight:500;color:var(--ink);text-decoration:none;
  border-bottom:1px solid var(--line);transition:color .18s ease,padding-left .18s ease;
}
.side-list a:last-child{border-bottom:0}
.side-list a:hover{color:var(--brand);padding-left:4px}
.side-list svg{flex:0 0 12px;transition:transform .18s ease}
.side-list a:hover svg{transform:translateX(4px)}
.side-note{font-size:13px;line-height:1.75;color:rgba(12,19,16,.6)}

/* ---------- related ---------- */
.related{margin-top:56px;padding-top:40px;border-top:1px solid var(--line);max-width:1000px}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:12px;margin-bottom:8px}
.section-head h2{font-size:clamp(20px,2.6vw,26px);font-weight:700;color:var(--ink);letter-spacing:-.01em}
.section-head a{font-size:14px;font-weight:600;color:var(--brand);text-decoration:none}
.section-head a:hover{text-decoration:underline;text-underline-offset:3px}
.related-list{display:grid;grid-template-columns:1fr}
@media (min-width:768px){.related-list{grid-template-columns:1fr 1fr;column-gap:40px}}
.related-item{
  display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
  padding:18px 10px 18px 0;border-bottom:1px solid var(--line);text-decoration:none;color:var(--ink);
  transition:background .18s ease,padding-left .18s ease;
}
.related-item:hover{background:var(--paper-2);padding-left:10px}
.related-item h4{font-size:16px;font-weight:600;line-height:1.6;margin-bottom:6px}
.related-item p{font-size:13px;color:rgba(12,19,16,.6);line-height:1.7}
.related-item span{font-size:13px;color:rgba(12,19,16,.5);white-space:nowrap;padding-top:2px}
.back-links{display:flex;flex-wrap:wrap;align-items:center;gap:18px;margin-top:32px}
.back-links a{font-size:14px;font-weight:600;color:var(--brand);text-decoration:none}
.back-links a:hover{text-decoration:underline;text-underline-offset:3px}

/* ---------- faq ---------- */
.faq-section{padding:64px 0 8px}
.faq-layout{display:grid;grid-template-columns:1fr;gap:28px}
@media (min-width:1024px){.faq-layout{grid-template-columns:minmax(0,360px) minmax(0,1fr);gap:56px}}
.faq-intro h2{font-size:clamp(22px,3vw,30px);font-weight:700;color:var(--ink);line-height:1.3}
.faq-intro p{font-size:15px;color:rgba(12,19,16,.65);margin-top:14px;max-width:340px}
.faq-item{position:relative;border-bottom:1px solid var(--line)}
.faq-item::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;
  background:var(--accent);opacity:0;transition:opacity .18s ease;
}
.faq-item.is-open::before{opacity:1}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:60px;padding:14px 0 14px 14px;background:transparent;border:0;
  font-size:16px;font-weight:600;color:var(--ink);text-align:left;cursor:pointer;
}
.faq-icon{
  flex:0 0 14px;width:14px;height:14px;position:relative;transition:transform .24s ease;
}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--ink)}
.faq-icon::before{left:0;top:6.5px;width:14px;height:1px}
.faq-icon::after{left:6.5px;top:0;width:1px;height:14px}
.faq-item.is-open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-a p{padding:0 14px 20px;font-size:15px;line-height:1.8;color:rgba(12,19,16,.72);margin:0}

/* ---------- cta ---------- */
.cta-band{background:var(--ink);color:var(--paper);padding:56px 0;margin-top:64px}
.cta-inner{display:flex;flex-direction:column;gap:24px}
@media (min-width:1024px){.cta-inner{flex-direction:row;align-items:center;justify-content:space-between;gap:48px}}
.cta-band h2{font-size:clamp(22px,3vw,30px);font-weight:700;color:var(--paper);line-height:1.3}
.cta-band p{font-size:15px;color:rgba(246,245,240,.7);margin-top:12px;max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
.cta-band .btn-outline{border-color:rgba(246,245,240,.3);color:var(--paper)}
.cta-band .btn-outline:hover{background:var(--paper);color:var(--ink)}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(246,245,240,.78);padding:56px 0 24px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media (min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}}
.site-footer .logo-main{color:var(--paper)}
.site-footer .logo-sub{color:rgba(246,245,240,.7);border-left-color:rgba(246,245,240,.24)}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(246,245,240,.66);margin:14px 0 16px;max-width:330px}
.footer-links{display:flex;flex-wrap:wrap;gap:8px 16px}
.footer-links a{font-size:13px;color:rgba(246,245,240,.72);text-decoration:none;transition:color .18s ease}
.footer-links a:hover{color:var(--accent)}
.footer-col h4{font-size:14px;font-weight:600;color:var(--paper);letter-spacing:.04em;margin-bottom:14px}
.footer-col ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px}
.footer-col li a{font-size:14px;color:rgba(246,245,240,.7);text-decoration:none;transition:color .18s ease}
.footer-col li a:hover{color:var(--accent)}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid rgba(246,245,240,.14);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:rgba(246,245,240,.5);
}

/* ---------- motion ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .42s ease,transform .42s ease}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category2 */
:root{
  --ink:#0C1310;
  --ink-2:#16211C;
  --brand:#0E3B2E;
  --accent:#CBFF3C;
  --alert:#FF6A1F;
  --paper:#F6F5F0;
  --paper-2:#EDEBE4;
  --line:rgba(12,19,16,.10);
  --nav-h:68px;
  --radius:6px;
  --shadow-hover:0 12px 32px rgba(12,19,16,.10);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;}
ul,ol{padding:0;list-style:none;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer;}
input,select,textarea{font:inherit;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
::selection{background:var(--accent);color:var(--ink);}

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

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.site-header.is-scrolled{
  background:var(--paper);
  border-bottom-color:var(--line);
  box-shadow:0 8px 24px rgba(12,19,16,.06);
}
.nav-bar{height:var(--nav-h);display:flex;align-items:center;justify-content:space-between;gap:20px;}
.logo{display:inline-flex;align-items:center;gap:10px;}
.logo-mark{display:inline-flex;align-items:center;}
.logo-text{display:inline-flex;align-items:baseline;gap:8px;}
.logo-main{font-size:19px;font-weight:800;letter-spacing:-.01em;color:var(--ink);}
.logo-sub{font-size:11px;letter-spacing:.14em;color:rgba(12,19,16,.58);border-left:1px solid var(--line);padding-left:8px;}

.nav-links{display:none;}
@media (min-width:1024px){
  .nav-links{display:flex;align-items:center;gap:26px;}
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:6px 0 8px;
  font-size:15px;
  font-weight:500;
  color:rgba(12,19,16,.78);
  transition:color .18s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:2px;height:2px;width:0;
  background:var(--accent);transition:width .18s var(--ease);
}
.nav-link:hover{color:var(--ink);}
.nav-link:hover::after{width:100%;}
.nav-link.is-active{color:var(--ink);font-weight:600;}
.nav-link.is-active::after{width:100%;}

.nav-right{display:flex;align-items:center;gap:10px;}
.search-btn{
  width:36px;height:36px;border-radius:50%;
  border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;
  transition:background .18s var(--ease),border-color .18s var(--ease);
}
.search-btn:hover{background:var(--paper-2);border-color:rgba(12,19,16,.2);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  height:48px;padding:0 24px;border-radius:4px;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background .18s var(--ease),color .18s var(--ease),transform .18s var(--ease),border-color .18s var(--ease);
}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-primary{background:var(--accent);color:var(--ink);}
.btn-primary:hover{background:var(--brand);color:var(--accent);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{border-color:rgba(12,19,16,.24);color:var(--ink);background:transparent;}
.btn-ghost:hover{background:var(--ink);color:var(--paper);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(0);}
.burger{
  display:flex;flex-direction:column;justify-content:center;gap:5px;
  width:40px;height:40px;padding:0 9px;border-radius:4px;
}
.burger span{display:block;height:1.5px;width:100%;background:var(--ink);transition:background .18s var(--ease);}
@media (min-width:1024px){.burger{display:none;}}

/* 移动抽屉 */
.drawer{
  position:fixed;inset:0;z-index:90;
  background:var(--paper);
  display:flex;flex-direction:column;
  padding:0 20px 24px;
  transform:translateY(-102%);
  transition:transform .28s var(--ease);
  overflow-y:auto;
}
.drawer.is-open{transform:translateY(0);}
.drawer-head{height:var(--nav-h);display:flex;align-items:center;justify-content:space-between;}
.drawer-close{width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;font-size:22px;line-height:1;border-radius:4px;}
.drawer-nav{display:grid;margin-top:6px;}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:20px;font-weight:600;line-height:56px;
  border-bottom:1px solid var(--line);
}
.drawer-nav a.is-active{color:var(--brand);}
.drawer-nav a span{font-size:13px;font-weight:400;color:rgba(12,19,16,.45);}
.drawer-cta{margin-top:auto;padding-top:24px;}
.drawer-cta .btn{width:100%;}
body.is-locked{overflow:hidden;}

/* ---------- 页头 ---------- */
.page-head{padding-top:calc(var(--nav-h) + 32px);padding-bottom:44px;}
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:14px;color:rgba(12,19,16,.55);
}
.breadcrumb a:hover{color:var(--ink);text-decoration:underline;text-underline-offset:4px;}
.breadcrumb .sep{color:rgba(12,19,16,.3);}
.breadcrumb .current{color:var(--ink);font-weight:600;}

.head-grid{display:grid;grid-template-columns:1fr;gap:28px;margin-top:22px;}
@media (min-width:1024px){
  .head-grid{grid-template-columns:7fr 5fr;gap:44px;align-items:end;}
}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;font-weight:600;letter-spacing:.14em;
  color:rgba(12,19,16,.6);
}
.eyebrow::before{content:"";width:24px;height:2px;background:var(--accent);display:block;}
.page-title{
  margin-top:14px;
  font-size:clamp(30px,4vw,46px);
  font-weight:800;line-height:1.1;letter-spacing:-.02em;
}
.lede{
  margin-top:16px;max-width:46ch;
  font-size:16px;line-height:1.9;color:rgba(12,19,16,.72);
}
.head-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.head-media img{
  width:100%;height:230px;object-fit:cover;border-radius:var(--radius);
  background:var(--paper-2);
}
@media (min-width:768px){.head-media img{height:280px;}}
@media (min-width:1024px){.head-media img{height:310px;}}

/* ---------- 锚点导航 ---------- */
.anchor-nav{
  position:sticky;top:var(--nav-h);z-index:40;
  background:rgba(246,245,240,.96);
  backdrop-filter:blur(6px);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.anchor-inner{
  display:flex;gap:8px;overflow-x:auto;
  padding:12px 0;scrollbar-width:none;
}
.anchor-inner::-webkit-scrollbar{display:none;}
.anchor-link{
  flex:0 0 auto;white-space:nowrap;
  font-size:14px;padding:7px 15px;border-radius:999px;
  border:1px solid var(--line);color:rgba(12,19,16,.72);
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.anchor-link:hover{background:var(--paper-2);border-color:rgba(12,19,16,.24);color:var(--ink);}

/* ---------- 板块通用 ---------- */
.section{padding:56px 0;}
@media (min-width:768px){.section{padding:88px 0;}}
section[id]{scroll-margin-top:calc(var(--nav-h) + 72px);}
.sec-head{max-width:60ch;}
.section-title{
  margin-top:14px;
  font-size:clamp(24px,3vw,34px);
  font-weight:700;line-height:1.22;letter-spacing:-.01em;
}
.sec-sub{margin-top:12px;font-size:15.5px;line-height:1.85;color:rgba(12,19,16,.68);}
.muted{font-size:14.5px;color:rgba(12,19,16,.6);}

/* ---------- 阶梯行式列表 ---------- */
.ladder{border-top:1px solid var(--line);margin-top:36px;}
.ladder-row{
  display:grid;grid-template-columns:46px minmax(0,1fr);gap:10px 18px;
  padding:24px 0;border-bottom:1px solid var(--line);
  transition:background .18s var(--ease),transform .18s var(--ease);
}
@media (min-width:1024px){
  .ladder-row{
    grid-template-columns:56px minmax(0,1fr) auto 110px;
    align-items:center;gap:0 28px;
  }
}
.ladder-row:hover{background:var(--paper-2);transform:translateX(4px);}
.ladder-idx{
  font-size:clamp(26px,3vw,38px);font-weight:800;line-height:1;
  color:var(--brand);letter-spacing:-.03em;font-variant-numeric:tabular-nums;
}
.ladder-body h3{font-size:18px;font-weight:600;line-height:1.5;}
.ladder-body p{margin-top:6px;font-size:15px;line-height:1.8;color:rgba(12,19,16,.7);max-width:52ch;}
.ladder-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px;}
@media (min-width:1024px){.ladder-tags{margin-top:0;}}
.ladder-side{
  font-size:13px;letter-spacing:.06em;color:rgba(12,19,16,.6);
  font-variant-numeric:tabular-nums;
}
@media (min-width:1024px){.ladder-side{text-align:right;}}

.pill{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:999px;font-size:12px;letter-spacing:.06em;
  border:1px solid var(--line);background:var(--paper);color:rgba(12,19,16,.7);
}
.pill-accent{background:var(--accent);border-color:transparent;color:var(--ink);font-weight:600;}
.pill-alert{border-color:rgba(255,106,31,.4);color:var(--alert);background:transparent;}

/* ---------- 左标题右列表 ---------- */
.split{display:grid;grid-template-columns:1fr;gap:32px;}
@media (min-width:1024px){.split{grid-template-columns:4fr 8fr;gap:56px;align-items:start;}}
.split-title{position:static;}
@media (min-width:1024px){.split-title{position:sticky;top:calc(var(--nav-h) + 86px);}}

.rule-list{border-top:1px solid var(--line);}
.rule-item{
  display:grid;grid-template-columns:52px minmax(0,1fr);gap:18px;
  padding:22px 0;border-bottom:1px solid var(--line);
  transition:background .18s var(--ease);
}
.rule-item:hover{background:var(--paper-2);}
.rule-num{
  font-size:clamp(24px,3vw,34px);font-weight:800;line-height:1;
  color:var(--brand);letter-spacing:-.03em;font-variant-numeric:tabular-nums;
}
.rule-item h3{font-size:17.5px;font-weight:600;line-height:1.5;}
.rule-item p{margin-top:6px;font-size:15px;line-height:1.8;color:rgba(12,19,16,.7);}

/* ---------- 时间线 + 指标 ---------- */
.tl-wrap{display:grid;grid-template-columns:1fr;gap:40px;}
@media (min-width:1024px){.tl-wrap{grid-template-columns:7fr 5fr;gap:56px;align-items:start;}}
.timeline{margin-top:28px;border-left:1px solid var(--line);margin-left:6px;}
.tl-item{position:relative;padding:0 0 30px 26px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:-5.5px;top:9px;
  width:10px;height:10px;border-radius:50%;
  background:var(--paper);border:2px solid var(--brand);
}
.tl-item:first-child::before{background:var(--accent);border-color:var(--brand);}
.tl-item h3{font-size:17px;font-weight:600;line-height:1.5;}
.tl-item p{margin-top:6px;font-size:15px;line-height:1.8;color:rgba(12,19,16,.7);}
.tl-step{
  font-size:12px;letter-spacing:.14em;color:var(--brand);font-weight:600;
  display:block;margin-bottom:4px;
}
.tl-media{margin-top:26px;}
.tl-media img{width:100%;height:210px;object-fit:cover;border-radius:var(--radius);background:var(--paper-2);}
.tl-note{margin-top:10px;font-size:13px;color:rgba(12,19,16,.55);}

.metrics{
  display:grid;grid-template-columns:1fr;gap:26px;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:32px 0;margin-top:44px;
}
@media (min-width:768px){.metrics{grid-template-columns:repeat(3,1fr);gap:32px;}}
.metric-num{
  font-size:clamp(34px,5vw,54px);font-weight:800;line-height:1;
  letter-spacing:-.03em;font-variant-numeric:tabular-nums;
}
.metric-num em{font-size:.42em;font-style:normal;font-weight:600;margin-left:6px;color:rgba(12,19,16,.6);}
.metric-label{margin-top:12px;font-size:13px;letter-spacing:.06em;color:rgba(12,19,16,.6);}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line);margin-top:8px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  text-align:left;padding:19px 0 19px 14px;
  position:relative;font-size:16px;font-weight:600;line-height:1.6;
  transition:color .18s var(--ease);
}
.faq-q::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;
  background:var(--accent);opacity:0;transition:opacity .18s var(--ease);
}
.faq-item.is-open .faq-q::before{opacity:1;}
.faq-q:hover{color:var(--brand);}
.faq-icon{
  flex:0 0 auto;width:9px;height:9px;margin-right:6px;margin-top:-4px;
  border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);
  transform:rotate(45deg);transition:transform .18s var(--ease);
}
.faq-item.is-open .faq-icon{transform:rotate(-135deg);margin-top:4px;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s var(--ease);}
.faq-a p{
  padding:0 0 22px 14px;font-size:15px;line-height:1.85;
  color:rgba(12,19,16,.72);max-width:66ch;
}

/* ---------- 深色 CTA 通栏 ---------- */
.band-dark{background:var(--ink);color:var(--paper);padding:46px 0;}
.band-grid{display:grid;grid-template-columns:1fr;gap:26px;align-items:center;}
@media (min-width:1024px){.band-grid{grid-template-columns:minmax(0,1fr) auto;gap:48px;}}
.band-dark .eyebrow{color:rgba(246,245,240,.62);}
.band-dark h2{
  margin-top:12px;font-size:clamp(20px,2.6vw,28px);
  font-weight:700;line-height:1.3;color:var(--paper);
}
.band-dark p{margin-top:10px;font-size:15px;line-height:1.85;color:rgba(246,245,240,.72);max-width:62ch;}
.band-actions{display:flex;flex-wrap:wrap;gap:12px;}
.band-meta{margin-top:16px;font-size:13px;color:rgba(246,245,240,.5);letter-spacing:.04em;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:var(--paper);padding:56px 0 24px;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px;}
@media (min-width:768px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;}}
.footer-brand .logo-main{color:var(--paper);}
.footer-brand .logo-sub{color:rgba(246,245,240,.6);border-left-color:rgba(246,245,240,.2);}
.footer-brand p{
  margin:16px 0 18px;max-width:34ch;
  font-size:14px;line-height:1.85;color:rgba(246,245,240,.68);
}
.footer-links{display:flex;flex-wrap:wrap;gap:8px 18px;font-size:14px;}
.footer-links a{color:rgba(246,245,240,.78);transition:color .18s var(--ease);}
.footer-links a:hover{color:var(--accent);}
.footer-col h4{
  font-size:14px;font-weight:600;letter-spacing:.06em;
  color:var(--paper);margin-bottom:16px;
}
.footer-col ul{display:grid;gap:10px;font-size:14px;}
.footer-col a{color:rgba(246,245,240,.72);transition:color .18s var(--ease);}
.footer-col a:hover{color:var(--accent);}
.footer-bottom{
  margin-top:44px;padding-top:18px;
  border-top:1px solid rgba(246,245,240,.12);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:12.5px;color:rgba(246,245,240,.5);
}

/* ---------- 动效 ---------- */
.reveal{
  opacity:0;transform:translateY(24px);
  transition:opacity .42s var(--ease),transform .42s var(--ease);
}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation:none !important;transition:none !important;}
  .reveal{opacity:1 !important;transform:none !important;}
}

/* roulang page: category3 */
:root{
  --ink:#0C1310;
  --ink-2:#16211C;
  --brand:#0E3B2E;
  --accent:#CBFF3C;
  --alert:#FF6A1F;
  --paper:#F6F5F0;
  --paper-2:#EDEBE4;
  --line:rgba(12,19,16,.10);
  --muted:rgba(12,19,16,.62);
  --radius:6px;
  --radius-sm:4px;
  --shadow-hover:0 12px 32px rgba(12,19,16,.10);
  --ease:cubic-bezier(.2,.7,.3,1);
}

*,*::before,*::after{box-sizing:border-box}
html{overflow-x:hidden;-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--paper);
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,select,textarea{font:inherit;color:inherit}
table{border-collapse:collapse;width:100%}
ul,ol{margin:0;padding:0;list-style:none}

a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
}

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

/* ============ 导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.site-header.is-scrolled{
  background:var(--paper);
  border-bottom-color:var(--line);
  box-shadow:0 8px 24px rgba(12,19,16,.06);
}
.nav-bar{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px}
@media (min-width:1024px){.nav-bar{height:72px}}

.logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{display:inline-flex;line-height:0}
.logo-text{display:inline-flex;align-items:baseline;white-space:nowrap}
.logo-main{font-weight:800;font-size:18px;letter-spacing:-.01em;color:var(--ink)}
.logo-sub{
  font-size:12px;font-weight:500;color:var(--muted);
  padding-left:9px;margin-left:9px;border-left:1px solid var(--line);
  letter-spacing:.02em;
}

.nav-links{display:none;align-items:center;gap:26px}
@media (min-width:1024px){.nav-links{display:flex}}
.nav-link{
  position:relative;display:inline-block;padding:6px 0;
  font-size:14.5px;color:rgba(12,19,16,.72);
  transition:color .18s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--accent);transition:width .18s var(--ease);
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--ink);font-weight:600}
.nav-link.is-active::after{width:100%}

.nav-right{display:flex;align-items:center;gap:12px}
.search-btn{
  display:none;width:38px;height:38px;border:1px solid var(--line);border-radius:999px;
  align-items:center;justify-content:center;background:rgba(255,255,255,.5);
  transition:background .18s var(--ease),transform .18s var(--ease),border-color .18s var(--ease);
}
@media (min-width:768px){.search-btn{display:inline-flex}}
.search-btn:hover{background:#fff;border-color:rgba(12,19,16,.24);transform:translateY(-1px)}

.burger{
  display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
  width:40px;height:40px;padding:0 8px;border-radius:var(--radius-sm);
}
.burger span{display:block;height:2px;width:100%;background:var(--ink);border-radius:1px}
@media (min-width:1024px){.burger{display:none}}

.drawer{
  position:fixed;inset:0;z-index:90;background:#fff;
  transform:translateX(100%);transition:transform .28s var(--ease);
  display:flex;flex-direction:column;padding:20px;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line)}
.drawer-close{width:40px;height:40px;font-size:22px;line-height:1;color:var(--ink);border-radius:var(--radius-sm)}
.drawer-nav{display:flex;flex-direction:column;margin-top:8px}
.drawer-nav a{
  font-size:20px;font-weight:600;line-height:56px;
  border-bottom:1px solid var(--line);color:var(--ink);
}
.drawer-nav a.is-active{color:var(--brand)}
.drawer-cta{margin-top:auto;padding-top:20px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;white-space:nowrap;
  border:1px solid transparent;cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),transform .18s var(--ease),border-color .18s var(--ease);
}
.btn-primary{background:var(--accent);color:var(--ink)}
.btn-primary:hover{background:var(--brand);color:var(--accent);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{border-color:rgba(12,19,16,.22);color:var(--ink);background:transparent}
.btn-ghost:hover{background:var(--ink);color:var(--paper);transform:translateY(-1px)}
.btn-sm{height:38px;padding:0 18px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none}

.pill{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border:1px solid var(--line);border-radius:999px;
  font-size:12px;letter-spacing:.06em;color:rgba(12,19,16,.72);background:rgba(255,255,255,.6);
}
.pill-accent{background:var(--accent);border-color:var(--accent);color:var(--ink);font-weight:600}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;letter-spacing:.14em;color:var(--muted);
}
.eyebrow::before{content:"";display:block;width:24px;height:1px;background:var(--accent)}

/* ============ 主体 ============ */
main{padding-top:96px}
@media (min-width:1024px){main{padding-top:112px}}

.breadcrumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--muted);flex-wrap:wrap}
.breadcrumb a:hover{color:var(--ink)}
.breadcrumb .sep{color:rgba(12,19,16,.32)}
.breadcrumb .current{color:var(--ink);font-weight:600}

/* 页头 */
.page-head{padding:24px 0 48px;border-bottom:1px solid var(--line)}
.head-grid{display:grid;grid-template-columns:1fr;gap:32px;margin-top:24px;align-items:center}
@media (min-width:1024px){.head-grid{grid-template-columns:7fr 5fr;gap:48px;margin-top:34px}}
.page-head h1{
  font-size:clamp(30px,4vw,44px);
  font-weight:800;line-height:1.12;letter-spacing:-.02em;
  margin:14px 0 0;
}
.head-lead{
  margin:16px 0 0;max-width:44ch;
  font-size:16px;line-height:1.9;color:rgba(12,19,16,.74);
}
.head-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.head-stats{
  display:flex;flex-wrap:wrap;gap:0;margin-top:32px;
  padding-top:22px;border-top:1px solid var(--line);
}
.head-stats > div{
  padding:0 22px;border-left:1px solid var(--line);
  display:flex;flex-direction:column;
}
.head-stats > div:first-child{padding-left:0;border-left:0}
.head-stats strong{
  font-size:clamp(22px,3vw,30px);font-weight:800;letter-spacing:-.02em;line-height:1.2;
  font-variant-numeric:tabular-nums;
}
.head-stats span{font-size:12px;color:var(--muted);letter-spacing:.04em}
.head-media{margin:0}
.head-media img{
  width:100%;height:240px;object-fit:cover;border-radius:var(--radius);
  background:var(--paper-2);
}
@media (min-width:768px){.head-media img{height:300px}}
@media (min-width:1024px){.head-media img{height:320px}}

/* 锚点导航 */
.anchor-nav{
  position:sticky;top:64px;z-index:40;
  background:var(--paper);border-bottom:1px solid var(--line);
}
@media (min-width:1024px){.anchor-nav{top:72px}}
.anchor-inner{
  display:flex;gap:26px;overflow-x:auto;scrollbar-width:none;
  padding-top:14px;padding-bottom:14px;
}
.anchor-inner::-webkit-scrollbar{display:none}
.anchor-inner a{
  flex:0 0 auto;font-size:14px;font-weight:600;color:rgba(12,19,16,.62);
  transition:color .18s var(--ease);
}
.anchor-inner a:hover{color:var(--ink)}
.anchor-inner a::after{
  content:"";display:block;height:2px;width:0;background:var(--accent);
  transition:width .18s var(--ease);
}
.anchor-inner a:hover::after{width:100%}

/* 板块 */
.section{padding:64px 0}
@media (min-width:768px){.section{padding:88px 0}}
.section + .section{border-top:1px solid var(--line)}
.section-head{max-width:640px;margin-bottom:36px}
.section-head h2{
  font-size:clamp(24px,3vw,34px);font-weight:700;line-height:1.24;letter-spacing:-.01em;
  margin:12px 0 0;
}
.section-head p{margin:14px 0 0;color:rgba(12,19,16,.68);font-size:15.5px}

/* 档位行式对比条 */
.plan-list{border-top:1px solid var(--line)}
.plan-row{
  position:relative;
  display:grid;grid-template-columns:minmax(0,3fr) minmax(0,5fr) minmax(0,3fr);
  gap:28px;align-items:center;
  padding:26px 20px 26px 24px;
  border-bottom:1px solid var(--line);
  transition:background .18s var(--ease),transform .18s var(--ease);
}
.plan-row:hover{background:var(--paper-2);transform:translateX(4px)}
.plan-row.is-featured{background:rgba(14,59,46,.05);box-shadow:inset 4px 0 0 var(--accent)}
.plan-row.is-featured:hover{background:var(--paper-2)}

.plan-name{display:flex;flex-direction:column;gap:4px}
.plan-index{
  font-size:13px;font-weight:800;letter-spacing:.12em;color:var(--brand);
  font-variant-numeric:tabular-nums;
}
.plan-name h3{font-size:19px;font-weight:700;margin:0;letter-spacing:-.01em}
.plan-name p{margin:0;font-size:14px;color:var(--muted);line-height:1.7}

.plan-tags{display:flex;flex-wrap:wrap;gap:8px}

.plan-price{display:flex;flex-direction:column;align-items:flex-start;gap:6px}
.price-num{
  font-size:clamp(28px,4vw,40px);font-weight:800;line-height:1.05;letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;
}
.price-note{margin:0;font-size:13px;color:var(--alert);font-weight:600}
.price-note.is-plain{color:var(--muted);font-weight:500}
.plan-price .btn{margin-top:8px}
.plan-flag{
  position:absolute;top:0;right:20px;
  background:var(--accent);color:var(--ink);
  font-size:12px;font-weight:700;letter-spacing:.06em;
  padding:3px 10px;border-radius:0 0 6px 6px;
}

@media (max-width:900px){
  .plan-row{grid-template-columns:1fr;gap:16px;padding:22px 18px}
  .plan-price{flex-direction:row;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}
  .plan-price .btn{margin-top:0}
  .plan-flag{right:12px}
}

/* 权益矩阵 */
.matrix-wrap{
  overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);
  background:rgba(255,255,255,.55);scrollbar-width:none;
}
.matrix-wrap::-webkit-scrollbar{display:none}
.matrix{min-width:680px}
.matrix caption{
  text-align:left;padding:18px 20px 6px;font-size:13px;color:var(--muted);letter-spacing:.06em;
}
.matrix th,.matrix td{
  padding:15px 20px;font-size:14.5px;text-align:left;
  border-bottom:1px solid var(--line);
}
.matrix thead th{
  font-size:13px;font-weight:600;color:var(--muted);letter-spacing:.06em;
  border-bottom:1px solid rgba(12,19,16,.18);
}
.matrix tbody th{font-weight:600;color:var(--ink)}
.matrix tbody tr{transition:background .18s var(--ease)}
.matrix tbody tr:hover{background:var(--paper-2)}
.matrix tbody tr:last-child th,.matrix tbody tr:last-child td{border-bottom:0}
.matrix td strong{font-weight:700;font-variant-numeric:tabular-nums}
.matrix .none{color:rgba(12,19,16,.34)}

/* 流程步骤 */
.steps{display:grid;grid-template-columns:1fr;gap:0;border-top:1px solid var(--line)}
@media (min-width:768px){.steps{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.steps{grid-template-columns:repeat(4,1fr)}}
.step{
  padding:26px 22px;border-bottom:1px solid var(--line);
  transition:background .18s var(--ease);
}
@media (min-width:1024px){
  .step{border-right:1px solid var(--line)}
  .step:last-child{border-right:0}
}
.step:hover{background:var(--paper-2)}
.step-num{
  display:block;
  font-size:clamp(34px,5vw,52px);font-weight:800;line-height:1;letter-spacing:-.03em;
  color:var(--brand);font-variant-numeric:tabular-nums;
}
.step h3{font-size:17px;font-weight:700;margin:14px 0 6px}
.step p{margin:0;font-size:14px;color:var(--muted);line-height:1.75}

/* 选择指引 */
.choose-grid{display:grid;grid-template-columns:1fr;gap:28px}
@media (min-width:1024px){.choose-grid{grid-template-columns:8fr 4fr;gap:40px}}
.choose-list{border-top:1px solid var(--line)}
.choose-item{
  display:flex;gap:18px;padding:22px 0;border-bottom:1px solid var(--line);
}
.choose-item .dot{
  flex:0 0 auto;width:10px;height:10px;margin-top:12px;
  background:var(--accent);border:1px solid rgba(12,19,16,.2);border-radius:1px;
}
.choose-item h3{font-size:17px;font-weight:700;margin:0 0 6px}
.choose-item p{margin:0;font-size:14.5px;color:rgba(12,19,16,.7)}
.choose-item a{
  display:inline-block;margin-top:8px;font-size:14px;font-weight:600;
  border-bottom:1px solid rgba(12,19,16,.28);transition:border-color .18s var(--ease);
}
.choose-item a:hover{border-color:var(--accent)}

.side-card{
  background:var(--brand);color:var(--paper);
  border-radius:var(--radius);padding:28px 24px;
}
.side-card h3{font-size:17px;font-weight:700;margin:0 0 14px;color:#fff}
.side-card ul{display:flex;flex-direction:column;gap:12px}
.side-card li{
  font-size:14.5px;line-height:1.7;color:rgba(246,245,240,.84);
  padding-left:16px;position:relative;
}
.side-card li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;
  background:var(--accent);border-radius:1px;
}
.side-card .btn{margin-top:22px;width:100%}

/* FAQ */
.faq-grid{display:grid;grid-template-columns:1fr;gap:28px}
@media (min-width:1024px){.faq-grid{grid-template-columns:4fr 8fr;gap:48px}}
.faq-intro h2{
  font-size:clamp(24px,3vw,32px);font-weight:700;line-height:1.26;margin:12px 0 0;
}
.faq-intro p{margin:14px 0 0;font-size:15px;color:var(--muted)}

.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  position:relative;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:60px;padding:14px 34px 14px 16px;
  font-size:16px;font-weight:600;cursor:pointer;list-style:none;
  transition:background .18s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{background:var(--paper-2)}
.faq-item summary::after{
  content:"";position:absolute;right:12px;top:50%;
  width:9px;height:9px;border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);
  transform:translateY(-70%) rotate(45deg);
  transition:transform .18s var(--ease);
}
.faq-item[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.faq-item[open] summary{background:rgba(203,255,60,.14);box-shadow:inset 3px 0 0 var(--accent)}
.faq-answer{padding:6px 34px 22px 16px;font-size:15px;line-height:1.85;color:rgba(12,19,16,.74)}

/* CTA 通栏 */
.cta-band{background:var(--ink);color:var(--paper);padding:40px 0}
.cta-inner{
  display:flex;flex-direction:column;gap:24px;
  align-items:flex-start;
}
@media (min-width:1024px){
  .cta-inner{flex-direction:row;align-items:center;justify-content:space-between;gap:40px}
}
.cta-inner h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;line-height:1.3;margin:0;color:#fff;letter-spacing:-.01em}
.cta-inner p{margin:10px 0 0;font-size:15px;color:rgba(246,245,240,.74);max-width:56ch}
.cta-inner .btn{flex:0 0 auto}

/* 页脚 */
.site-footer{background:var(--ink);color:var(--paper);padding:56px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:2fr 1fr 1fr 1.2fr;gap:40px}}
.site-footer .logo-main{color:var(--paper)}
.site-footer .logo-sub{color:rgba(246,245,240,.66);border-left-color:rgba(246,245,240,.22)}
.footer-brand p{margin:16px 0 0;font-size:14px;color:rgba(246,245,240,.68);max-width:34ch;line-height:1.8}
.footer-links{display:flex;flex-wrap:wrap;gap:16px;margin-top:18px}
.footer-links a{
  font-size:13px;color:rgba(246,245,240,.72);
  border-bottom:1px solid rgba(246,245,240,.24);padding-bottom:2px;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-links a:hover{color:var(--accent);border-color:var(--accent)}
.footer-col h4{
  font-size:13px;font-weight:600;letter-spacing:.1em;color:rgba(246,245,240,.56);
  margin:0 0 16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col a{font-size:14px;color:rgba(246,245,240,.82);transition:color .18s var(--ease)}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(246,245,240,.14);
  font-size:12.5px;color:rgba(246,245,240,.52);
}

/* 动效 */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .42s var(--ease),transform .42s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

section[id]{scroll-margin-top:150px}

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