/* roulang page: index */
:root{
  --c-ink:#0F1512;
  --c-ink-soft:#1B211E;
  --c-accent:#C9F24D;
  --c-accent-press:#A8D62F;
  --c-flame:#FF5B2E;
  --c-bg:#F6F5F1;
  --c-surface:#FFFFFF;
  --c-line:#E3E2DB;
  --c-text:#1B1F1D;
  --c-muted:#5C6360;
  --c-faint:#8B918D;
  --c-ok:#1FA971;
  --r-card:14px;
  --r-btn:10px;
  --dur:.19s;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --font-mono:"DIN Alternate","JetBrains Mono",ui-monospace,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font-sans);background:var(--c-bg);color:var(--c-text);
  font-size:16px;line-height:1.8;-webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit;border:0;background:none;cursor:pointer;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:4px}
.shell{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (max-width:640px){.shell{padding:0 16px}}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}

/* ---------- 顶部通告条 ---------- */
.announce{background:var(--c-ink);color:#fff;border-bottom:1px solid rgba(255,255,255,.08)}
.announce-inner{display:flex;align-items:center;justify-content:space-between;gap:14px;min-height:38px;font-size:13px}
.announce-left{display:flex;align-items:center;gap:10px;min-width:0}
.announce-tag{display:inline-flex;align-items:center;gap:6px;height:22px;padding:0 10px;border-radius:999px;background:rgba(201,242,77,.16);color:var(--c-accent);font-size:12px;font-weight:600;white-space:nowrap}
.pulse-dot{width:6px;height:6px;border-radius:50%;background:var(--c-accent);animation:ticker 1.8s var(--ease) infinite}
.announce-text{color:rgba(255,255,255,.62);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.announce-right{color:rgba(255,255,255,.72);white-space:nowrap}
.announce-right b{color:var(--c-accent);font-family:var(--font-mono);font-weight:700;letter-spacing:.02em}

/* ---------- 导航 ---------- */
.site-header{position:sticky;top:0;z-index:80;background:var(--c-ink);border-bottom:1px solid rgba(255,255,255,.09);transition:box-shadow var(--dur) var(--ease)}
.site-header.is-stuck{box-shadow:0 10px 26px rgba(15,21,18,.22)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:68px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:32px;height:32px;border-radius:10px;background:var(--c-accent);color:var(--c-ink);
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:16px;flex-shrink:0;
  position:relative;overflow:hidden;
}
.brand-mark::after{content:"";position:absolute;left:0;right:0;bottom:5px;height:1px;background:rgba(15,21,18,.28)}
.brand-text{color:#fff;font-size:16px;font-weight:700;letter-spacing:-.01em;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-link{position:relative;font-size:14px;font-weight:500;color:rgba(255,255,255,.7);padding:9px 1px;transition:color var(--dur) var(--ease)}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;background:var(--c-accent);transform:scaleX(0);transform-origin:left;transition:transform .18s var(--ease)}
.nav-link:hover{color:#fff}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:#fff;font-weight:600}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:12px;flex-shrink:0}
.nav-badge{display:inline-flex;align-items:center;height:22px;padding:0 10px;border-radius:999px;background:var(--c-flame);color:#fff;font-size:12px;font-weight:600;letter-spacing:.02em}
.menu-btn{display:none;width:40px;height:40px;border-radius:10px;border:1px solid rgba(255,255,255,.2);align-items:center;justify-content:center}
.menu-btn span{display:block;width:16px;height:1.5px;background:#fff;position:relative}
.menu-btn span::before,.menu-btn span::after{content:"";position:absolute;left:0;width:16px;height:1.5px;background:#fff}
.menu-btn span::before{top:-5px}
.menu-btn span::after{top:5px}

/* 移动端抽屉 */
.drawer{position:fixed;inset:0;z-index:120;background:var(--c-ink);display:none;flex-direction:column;padding:22px 22px 0}
.drawer.is-open{display:flex}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px}
.drawer-close{width:40px;height:40px;border-radius:10px;border:1px solid rgba(255,255,255,.2);color:#fff;font-size:20px;line-height:1}
.drawer-link{display:flex;align-items:center;justify-content:space-between;height:52px;color:#fff;font-size:16px;border-bottom:1px solid rgba(255,255,255,.1);transition:color var(--dur) var(--ease)}
.drawer-link:hover,.drawer-link.is-active{color:var(--c-accent)}
.drawer-cta{margin-top:auto;padding:22px 0 30px}
.drawer-cta .btn{width:100%}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;white-space:nowrap;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease)}
.btn-sm{height:38px;padding:0 16px;font-size:13.5px}
.btn-primary{background:var(--c-accent);color:var(--c-ink);box-shadow:0 1px 2px rgba(15,21,18,.08)}
.btn-primary:hover{background:var(--c-accent-press);transform:translateY(1px)}
.btn-primary:active{transform:translateY(2px);box-shadow:inset 0 2px 6px rgba(15,21,18,.2)}
.btn-ghost-light{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.55)}
.btn-ghost-light:hover{background:#fff;color:var(--c-ink);border-color:#fff}
.btn-dark{background:transparent;color:var(--c-ink);border:1.5px solid var(--c-ink)}
.btn-dark:hover{background:var(--c-ink);color:var(--c-accent)}
.link-more{position:relative;display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-text);padding-bottom:2px}
.link-more::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--c-accent);transform:scaleX(0);transform-origin:left;transition:transform .18s var(--ease)}
.link-more:hover::after{transform:scaleX(1)}

/* ---------- 徽章 / 标签 ---------- */
.chip{display:inline-flex;align-items:center;gap:7px;height:26px;padding:0 11px;border-radius:999px;border:1px solid var(--c-line);background:var(--c-surface);font-size:12px;color:var(--c-muted)}
.cat-tag{display:inline-flex;align-items:center;gap:6px;font-size:11px;font-weight:700;letter-spacing:.12em;color:var(--c-muted);text-transform:uppercase}
.cat-tag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-accent);flex-shrink:0}
.ok-dot{width:7px;height:7px;border-radius:50%;background:var(--c-ok);box-shadow:0 0 0 3px rgba(31,169,113,.18);flex-shrink:0}

/* ---------- 首屏 ---------- */
.hero{position:relative;overflow:hidden;background:var(--c-ink);color:#fff;padding:70px 0 84px}
.hero-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center;opacity:.32}
.hero-veil{position:absolute;inset:0;background:linear-gradient(100deg,rgba(15,21,18,.95) 0%,rgba(15,21,18,.8) 48%,rgba(15,21,18,.56) 100%)}
.hero-lines{position:absolute;inset:0;background-image:repeating-linear-gradient(to bottom,rgba(255,255,255,.055) 0 1px,transparent 1px 94px);opacity:.85}
.hero .shell{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:1.32fr 1fr;gap:56px;align-items:center;min-height:500px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 13px;border-radius:999px;
  background:rgba(201,242,77,.13);border:1px solid rgba(201,242,77,.34);color:var(--c-accent);font-size:13px;font-weight:600}
.hero h1{font-size:clamp(32px,4.3vw,58px);line-height:1.14;font-weight:800;letter-spacing:-.02em;margin:20px 0 20px}
.hero-sub{font-size:17px;line-height:1.85;color:rgba(255,255,255,.76);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:34px}
.hbadge{display:inline-flex;align-items:center;gap:8px;height:34px;padding:0 14px;border-radius:999px;
  border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.05);font-size:13px;color:rgba(255,255,255,.82)}
.hero-visual{position:relative}
.device-card{background:var(--c-surface);color:var(--c-text);border-radius:20px;padding:22px;max-width:340px;margin-left:auto;
  box-shadow:0 26px 60px rgba(0,0,0,.38);border:1px solid rgba(255,255,255,.08)}
.device-head{display:flex;align-items:center;gap:10px;padding-bottom:14px;border-bottom:1px solid var(--c-line)}
.device-logo{width:26px;height:26px;border-radius:8px;background:var(--c-ink);color:var(--c-accent);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800}
.device-title{font-size:15px;font-weight:700}
.device-tag{margin-left:auto;font-size:11px;color:var(--c-ok);border:1px solid rgba(31,169,113,.35);background:rgba(31,169,113,.08);border-radius:999px;padding:2px 8px}
.device-field{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:14px;padding:11px 13px;border:1px solid var(--c-line);border-radius:10px;background:#FCFCFA}
.device-label{font-size:12.5px;color:var(--c-faint)}
.device-value{font-size:13.5px;color:var(--c-text);font-weight:600}
.device-btn{margin-top:16px;height:44px;border-radius:10px;background:var(--c-accent);color:var(--c-ink);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;transition:background var(--dur) var(--ease)}
.device-btn:hover{background:var(--c-accent-press)}
.device-foot{display:flex;align-items:center;gap:8px;justify-content:center;margin-top:14px;font-size:12px;color:var(--c-muted)}
.device-float{position:absolute;left:0;bottom:-22px;background:var(--c-ink-soft);border:1px solid rgba(255,255,255,.12);
  border-radius:14px;padding:14px 18px;box-shadow:0 16px 40px rgba(0,0,0,.35);max-width:180px}
.device-float-num{display:block;font-family:var(--font-mono);font-size:26px;font-weight:800;letter-spacing:-.03em;color:var(--c-accent);line-height:1.1}
.device-float-label{display:block;font-size:12px;color:rgba(255,255,255,.6);margin-top:4px;line-height:1.5}

/* ---------- 信任条 ---------- */
.trust{background:var(--c-surface);border-bottom:1px solid var(--c-line);padding:30px 0}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.trust-num{font-family:var(--font-mono);font-size:clamp(30px,3.4vw,42px);font-weight:800;letter-spacing:-.03em;line-height:1;color:var(--c-ink)}
.trust-num em{font-style:normal;font-size:.5em;margin-left:2px;color:var(--c-muted)}
.trust-label{font-size:13px;color:var(--c-muted);margin-top:10px}

/* ---------- 区块通用 ---------- */
.section{padding:96px 0}
.section-sm{padding:72px 0}
.bg-paper{background:var(--c-bg)}
.bg-surface{background:var(--c-surface)}
.bg-inkblock{background:var(--c-ink);color:#fff}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px;flex-wrap:wrap}
.sec-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--c-faint);text-transform:uppercase;margin-bottom:12px}
.sec-eyebrow::before{content:"";width:22px;height:2px;background:var(--c-accent)}
h2.sec-title{font-size:clamp(26px,3vw,38px);font-weight:700;line-height:1.28;letter-spacing:-.015em}
.sec-desc{margin-top:14px;font-size:16px;color:var(--c-muted);max-width:620px;line-height:1.85}
.bg-inkblock h2.sec-title{color:#fff}
.bg-inkblock .sec-desc{color:rgba(255,255,255,.68)}

/* ---------- 卡片 ---------- */
.card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:0 1px 2px rgba(15,21,18,.04);
  transition:box-shadow var(--dur) var(--ease),transform var(--dur) var(--ease),border-color var(--dur) var(--ease)}
.card:hover{box-shadow:0 12px 32px rgba(15,21,18,.10);transform:translateY(-2px);border-color:rgba(201,242,77,.75)}

/* ---------- 功能分组 ---------- */
.feature-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:24px;align-items:stretch}
.feat-main{overflow:hidden;display:flex;flex-direction:column}
.feat-main .thumb{position:relative;overflow:hidden}
.feat-main .thumb img{width:100%;height:280px;object-fit:cover;transition:transform .35s var(--ease)}
.feat-main:hover .thumb img{transform:scale(1.03)}
.feat-main .body{padding:30px 30px 34px}
.feat-side{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.feat-card{padding:24px 22px;display:flex;flex-direction:column;gap:10px}
.feat-index{font-family:var(--font-mono);font-size:13px;font-weight:700;color:var(--c-accent-press);letter-spacing:.06em}
.feat-card h3{font-size:19px;font-weight:600;line-height:1.45}
.feat-card p{font-size:14px;color:var(--c-muted);line-height:1.75}
.feat-card .arrow{margin-top:auto;font-size:13px;color:var(--c-faint);transition:color var(--dur) var(--ease),transform var(--dur) var(--ease)}
.feat-card:hover .arrow{color:var(--c-ink);transform:translateX(3px)}
.feat-main h3{font-size:clamp(20px,2.1vw,26px);font-weight:700;line-height:1.4;margin-bottom:14px}
.feat-main p{font-size:15.5px;color:var(--c-muted);line-height:1.9}

/* ---------- 要点列表 ---------- */
.dot-list{margin-top:18px;display:flex;flex-direction:column;gap:2px}
.dot-list li{position:relative;padding:9px 0 9px 22px;font-size:14.5px;color:var(--c-muted);border-bottom:1px dashed var(--c-line);transition:background var(--dur) var(--ease)}
.dot-list li:last-child{border-bottom:0}
.dot-list li::before{content:"";position:absolute;left:4px;top:18px;width:6px;height:6px;border-radius:1px;background:var(--c-accent)}
.dot-list li:hover{background:rgba(201,242,77,.06)}

/* ---------- 时间线 ---------- */
.timeline{position:relative;padding-left:36px;max-width:900px;margin:0 auto}
.timeline::before{content:"";position:absolute;left:7px;top:8px;bottom:8px;width:1px;background:var(--c-line)}
.tl-item{position:relative;padding-bottom:48px}
.tl-item:last-child{padding-bottom:0}
.tl-dot{position:absolute;left:-36px;top:8px;width:15px;height:15px;border-radius:50%;background:var(--c-accent);border:3px solid var(--c-surface);box-shadow:0 0 0 1px var(--c-line)}
.tl-step{font-family:var(--font-mono);font-size:13px;font-weight:700;color:var(--c-faint);letter-spacing:.08em}
.tl-item h3{font-size:clamp(19px,2vw,22px);font-weight:600;margin:8px 0 10px}
.tl-item p{font-size:15.5px;color:var(--c-muted);line-height:1.9;margin-bottom:6px}

/* ---------- 案例 ---------- */
.case-banner{position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid rgba(255,255,255,.1)}
.case-banner img{width:100%;height:340px;object-fit:cover;opacity:.72}
.case-banner .overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,21,18,.25) 0%,rgba(15,21,18,.92) 100%)}
.case-stats{position:absolute;left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(3,1fr);gap:18px;padding:28px 30px}
.case-stat b{display:block;font-family:var(--font-mono);font-size:clamp(28px,3.4vw,44px);font-weight:800;letter-spacing:-.03em;color:var(--c-accent);line-height:1.05}
.case-stat span{display:block;font-size:13px;color:rgba(255,255,255,.66);margin-top:6px}
.case-quotes{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:24px}
.quote-card{background:var(--c-ink-soft);border:1px solid rgba(255,255,255,.1);border-radius:var(--r-card);padding:26px 26px 24px;transition:border-color var(--dur) var(--ease),transform var(--dur) var(--ease)}
.quote-card:hover{border-color:rgba(201,242,77,.5);transform:translateY(-2px)}
.quote-card p{font-size:15.5px;line-height:1.9;color:rgba(255,255,255,.84)}
.quote-meta{display:flex;align-items:center;gap:10px;margin-top:18px;padding-top:16px;border-top:1px solid rgba(255,255,255,.1);font-size:13px;color:rgba(255,255,255,.55)}
.quote-avatar{width:30px;height:30px;border-radius:9px;background:var(--c-accent);color:var(--c-ink);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:13px}

/* ---------- 价格 ---------- */
.seg{display:inline-flex;padding:4px;border:1px solid var(--c-line);border-radius:999px;background:var(--c-surface)}
.seg button{height:34px;padding:0 20px;border-radius:999px;font-size:13.5px;font-weight:600;color:var(--c-muted);transition:all var(--dur) var(--ease)}
.seg button.is-on{background:var(--c-ink);color:var(--c-accent)}
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px;align-items:start}
.price-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:30px 28px 32px;
  transition:box-shadow var(--dur) var(--ease),transform var(--dur) var(--ease),border-color var(--dur) var(--ease)}
.price-card:hover{box-shadow:0 12px 32px rgba(15,21,18,.10);border-color:rgba(201,242,77,.7)}
.price-card.is-feature{background:var(--c-ink);color:#fff;border-color:var(--c-ink);transform:translateY(-8px);box-shadow:0 20px 48px rgba(15,21,18,.2)}
.price-flag{display:inline-flex;align-items:center;height:24px;padding:0 11px;border-radius:999px;background:var(--c-accent);color:var(--c-ink);font-size:12px;font-weight:700}
.price-name{font-size:19px;font-weight:700;margin-top:14px}
.price-amount{display:flex;align-items:baseline;gap:6px;margin:14px 0 6px}
.price-amount b{font-family:var(--font-mono);font-size:44px;font-weight:800;letter-spacing:-.03em;line-height:1}
.price-amount i{font-style:normal;font-size:14px;color:var(--c-muted)}
.price-card.is-feature .price-amount i{color:rgba(255,255,255,.6)}
.price-note{font-size:13px;color:var(--c-muted)}
.price-card.is-feature .price-note{color:rgba(255,255,255,.6)}
.price-list{margin:22px 0 26px;display:flex;flex-direction:column;gap:11px}
.price-list li{display:flex;gap:10px;font-size:14.5px;line-height:1.7;color:var(--c-muted)}
.price-card.is-feature .price-list li{color:rgba(255,255,255,.78)}
.tick{width:16px;height:16px;flex-shrink:0;margin-top:4px;color:var(--c-accent-press)}
.price-card.is-feature .tick{color:var(--c-accent)}

/* ---------- 内容列表 ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{display:flex;flex-direction:column;overflow:hidden;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);box-shadow:0 1px 2px rgba(15,21,18,.04);
  transition:box-shadow var(--dur) var(--ease),transform var(--dur) var(--ease),border-color var(--dur) var(--ease)}
.post-card:hover{box-shadow:0 12px 32px rgba(15,21,18,.10);transform:translateY(-2px);border-color:rgba(201,242,77,.75)}
.post-cover{position:relative;overflow:hidden;aspect-ratio:16/9;background:var(--c-ink)}
.post-cover img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease)}
.post-card:hover .post-cover img{transform:scale(1.03)}
.post-cover-line{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(15,21,18,.86);border-bottom:2px solid var(--c-accent)}
.post-body{padding:20px 20px 22px;display:flex;flex-direction:column;flex:1}
.post-title{font-size:17px;font-weight:600;line-height:1.55;margin-top:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-title a{position:relative;transition:color var(--dur) var(--ease)}
.post-title a:hover{color:var(--c-ink);text-decoration:underline;text-decoration-color:var(--c-accent);text-decoration-thickness:2px;text-underline-offset:4px}
.post-summary{margin-top:10px;font-size:14px;color:var(--c-muted);line-height:1.8;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.post-foot{margin-top:auto;padding-top:18px;display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12.5px;color:var(--c-faint);border-top:1px solid var(--c-line);margin-top:18px}
.empty-state{border:1px dashed var(--c-line);border-radius:var(--r-card);padding:56px 24px;text-align:center;background:var(--c-surface)}
.empty-state p{font-size:15px;color:var(--c-muted)}
.empty-state a{display:inline-block;margin-top:14px;font-size:14px;font-weight:600;color:var(--c-ink);border-bottom:2px solid var(--c-accent);padding-bottom:2px}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease)}
.faq-item.is-open{border-color:rgba(201,242,77,.9);box-shadow:0 8px 24px rgba(15,21,18,.07)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px;text-align:left;font-size:16px;font-weight:600;line-height:1.6}
.faq-icon{flex-shrink:0;width:24px;height:24px;border-radius:50%;border:1px solid var(--c-line);display:flex;align-items:center;justify-content:center;font-size:15px;color:var(--c-muted);transition:transform .2s var(--ease),background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease)}
.faq-item.is-open .faq-icon{transform:rotate(180deg);background:var(--c-accent);border-color:var(--c-accent);color:var(--c-ink)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s var(--ease)}
.faq-a p{padding:0 20px 20px;font-size:15px;color:var(--c-muted);line-height:1.9}

/* ---------- 底部 CTA ---------- */
.cta-block{position:relative;overflow:hidden;background:var(--c-ink);color:#fff;padding:64px 0}
.cta-lines{position:absolute;inset:0;background-image:repeating-linear-gradient(to bottom,rgba(255,255,255,.05) 0 1px,transparent 1px 62px)}
.cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{font-size:clamp(24px,2.8vw,34px);font-weight:700;line-height:1.35;max-width:620px}
.cta-inner p{margin-top:12px;font-size:15.5px;color:rgba(255,255,255,.7);max-width:560px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-ink);color:rgba(255,255,255,.72);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-text{font-size:15px}
.footer-desc{font-size:14px;line-height:1.85;color:rgba(255,255,255,.6);max-width:340px}
.footer-title{font-size:14px;font-weight:700;color:rgba(255,255,255,.95);margin-bottom:18px}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.66);transition:color var(--dur) var(--ease),padding-left var(--dur) var(--ease)}
.footer-links a:hover{color:var(--c-accent);padding-left:4px}
.footer-meta{font-size:14px;line-height:2;color:rgba(255,255,255,.6)}
.footer-meta a{color:var(--c-accent)}
.footer-bottom{margin-top:52px;border-top:1px solid rgba(255,255,255,.12);padding:22px 0;
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.5)}
.footer-bottom a{color:rgba(255,255,255,.6)}
.footer-bottom a:hover{color:var(--c-accent)}

/* ---------- 动效 ---------- */
@keyframes fade-up{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@keyframes ticker{0%,100%{opacity:1}50%{opacity:.25}}
@keyframes flip-num{0%{opacity:0;transform:translateY(-6px)}100%{opacity:1;transform:translateY(0)}}
@keyframes underline-sweep{from{transform:scaleX(0)}to{transform:scaleX(1)}}
.fade-1{animation:fade-up .6s var(--ease) both}
.fade-2{animation:fade-up .6s var(--ease) .06s both}
.fade-3{animation:fade-up .6s var(--ease) .12s both}
.fade-4{animation:fade-up .6s var(--ease) .18s both}
.scroll-in{opacity:0;transform:translateY(12px);transition:opacity .55s var(--ease),transform .55s var(--ease)}
.scroll-in.is-in{opacity:1;transform:translateY(0)}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .nav-links{display:none}
  .menu-btn{display:flex}
  .hero-grid{grid-template-columns:1fr;gap:44px;min-height:auto}
  .device-card{margin:0 auto}
  .device-float{left:50%;transform:translateX(-50%);bottom:-26px}
  .feature-grid{grid-template-columns:1fr}
  .price-grid{grid-template-columns:1fr;gap:20px}
  .price-card.is-feature{transform:none}
  .post-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:72px 0}
  .trust-grid{grid-template-columns:repeat(2,1fr);gap:28px}
}
@media (max-width:640px){
  body{font-size:16px}
  .announce-inner{min-height:44px;font-size:12px}
  .announce-text{display:none}
  .nav-inner{min-height:62px}
  .brand-text{font-size:14.5px}
  .nav-badge{display:none}
  .hero{padding:52px 0 68px}
  .hero h1{font-size:30px}
  .hero-sub{font-size:15.5px}
  .hero-actions .btn{width:100%}
  .device-float{position:static;transform:none;margin:16px auto 0;max-width:100%}
  .feat-side{grid-template-columns:1fr}
  .feat-main .thumb img{height:200px}
  .case-quotes{grid-template-columns:1fr}
  .case-stats{grid-template-columns:1fr;gap:12px;padding:20px}
  .post-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .section{padding:56px 0}
  .sec-head{margin-bottom:32px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important;scroll-behavior:auto !important}
  .scroll-in{opacity:1;transform:none}
}

/* roulang page: category1 */
:root{
    --c-ink:#0F1512;
    --c-ink-soft:#1B211E;
    --c-accent:#C9F24D;
    --c-accent-press:#A8D62F;
    --c-flame:#FF5B2E;
    --c-bg:#F6F5F1;
    --c-surface:#FFFFFF;
    --c-line:#E3E2DB;
    --c-text:#1B1F1D;
    --c-muted:#5C6360;
    --c-faint:#8B918D;
    --c-ok:#1FA971;
    --r-card:14px;
    --r-img:12px;
    --r-btn:10px;
    --dur:180ms;
    --ease:cubic-bezier(.22,.61,.36,1);
    --shadow-1:0 1px 2px rgba(15,21,18,.04);
    --shadow-2:0 12px 32px rgba(15,21,18,.10);
    --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
    --font-mono:"DIN Alternate","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--c-bg);
    color:var(--c-text);
    font-family:var(--font-sans);
    font-size:16px;
    line-height:1.8;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;height:auto}
  a{color:inherit;text-decoration:none}
  button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}
  ul,ol{margin:0;padding:0}
  h1,h2,h3,h4,p{margin:0}
  :focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:6px}
  ::selection{background:var(--c-accent);color:var(--c-ink)}

  @keyframes fade-up{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
  @keyframes ticker{from{transform:translateX(0)}to{transform:translateX(-50%)}}
  @keyframes flip-num{0%{opacity:0;transform:translateY(-8px)}100%{opacity:1;transform:none}}
  @keyframes underline-sweep{from{transform:scaleX(0)}to{transform:scaleX(1)}}

  .shell{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
  @media (max-width:640px){.shell{padding:0 16px}}

  /* ---------- header ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(246,245,241,.94);
    border-bottom:1px solid transparent;
    transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
  }
  .site-header.is-scrolled{background:var(--c-surface);border-bottom-color:var(--c-line);box-shadow:0 6px 24px rgba(15,21,18,.06)}
  .nav-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;height:68px}
  .brand{display:flex;align-items:center;gap:10px;flex:none}
  .brand-mark{
    width:32px;height:32px;border-radius:10px;background:var(--c-ink);color:var(--c-accent);
    display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:800;letter-spacing:0
  }
  .brand-text{font-size:17px;font-weight:800;letter-spacing:-.01em;color:var(--c-ink);white-space:nowrap}
  .nav-links{display:flex;align-items:center;gap:26px}
  .nav-link{
    position:relative;font-size:14px;font-weight:500;color:var(--c-text);
    padding:6px 0;transition:color var(--dur) var(--ease);
  }
  .nav-link::after{
    content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--c-accent);
    transform:scaleX(0);transform-origin:left center;transition:transform var(--dur) var(--ease);
  }
  .nav-link:hover{color:var(--c-ink)}
  .nav-link:hover::after{transform:scaleX(1)}
  .nav-link.is-active{color:var(--c-ink);font-weight:700}
  .nav-link.is-active::after{transform:scaleX(1)}
  .nav-right{display:flex;align-items:center;gap:12px;flex:none}
  .nav-badge{
    display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
    background:var(--c-flame);color:#fff;font-size:11px;font-weight:700;letter-spacing:.02em;white-space:nowrap
  }
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 22px;
    border-radius:var(--r-btn);border:1.5px solid transparent;font-size:15px;font-weight:600;
    transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
  }
  .btn-primary{background:var(--c-accent);color:var(--c-ink)}
  .btn-primary:hover{background:var(--c-accent-press);transform:translateY(1px)}
  .btn-primary:active{transform:translateY(2px);box-shadow:inset 0 2px 6px rgba(15,21,18,.18)}
  .btn-ghost{border-color:var(--c-ink);color:var(--c-ink);background:transparent}
  .btn-ghost:hover{background:var(--c-ink);color:var(--c-accent)}
  .btn-ghost:active{transform:translateY(1px)}
  .btn-sm{height:38px;padding:0 16px;font-size:14px}
  .btn-lg{height:50px;padding:0 28px;font-size:16px}
  .menu-btn{
    display:none;width:42px;height:42px;border-radius:10px;border:1.5px solid var(--c-ink);
    align-items:center;justify-content:center;flex-direction:column;gap:5px;transition:background var(--dur) var(--ease)
  }
  .menu-btn span{display:block;width:18px;height:2px;background:var(--c-ink);transition:transform var(--dur) var(--ease)}
  .menu-btn:hover{background:rgba(201,242,77,.35)}

  /* ---------- hero ---------- */
  .page-hero{padding:48px 0 56px;background:var(--c-bg);position:relative;overflow:hidden}
  .page-hero::before{
    content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
    background-image:repeating-linear-gradient(to bottom,rgba(15,21,18,.05) 0 1px,transparent 1px 68px);
  }
  .page-hero .shell{position:relative}
  .breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-faint);margin-bottom:20px}
  .breadcrumb a{color:var(--c-faint);transition:color var(--dur) var(--ease)}
  .breadcrumb a:hover{color:var(--c-ink)}
  .breadcrumb .sep{color:var(--c-line)}
  .breadcrumb .current{color:var(--c-muted)}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:700;letter-spacing:.16em;
    text-transform:uppercase;color:var(--c-muted);margin-bottom:14px
  }
  .eyebrow::before{content:"";width:8px;height:8px;border-radius:999px;background:var(--c-accent);display:inline-block}
  .page-hero h1{
    font-size:clamp(28px,5vw,54px);font-weight:800;line-height:1.18;letter-spacing:-.02em;color:var(--c-ink);
    max-width:900px;animation:fade-up .5s var(--ease) both
  }
  .lead{font-size:17px;line-height:1.85;color:var(--c-muted);max-width:760px;margin-top:18px;animation:fade-up .5s var(--ease) .06s both}
  .chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;animation:fade-up .5s var(--ease) .12s both}
  .chip{
    display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;border-radius:999px;
    border:1px solid var(--c-line);background:var(--c-surface);font-size:13px;color:var(--c-muted)
  }
  .dot{width:7px;height:7px;border-radius:999px;background:var(--c-ok);display:inline-block;flex:none}
  .hero-figure{margin-top:36px;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--c-line);box-shadow:var(--shadow-1)}
  .hero-figure img{width:100%;height:300px;object-fit:cover}
  @media (max-width:768px){.hero-figure img{height:190px}}

  /* ---------- sections ---------- */
  .section{padding:88px 0}
  .section-stats{padding:0}
  .section-surface{background:var(--c-surface)}
  .section-ink{background:var(--c-ink);color:#fff}
  @media (max-width:1023px){.section{padding:56px 0}}

  .stats-row{
    display:grid;grid-template-columns:repeat(4,1fr);gap:0;
    background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
    margin-top:-1px;box-shadow:var(--shadow-1);overflow:hidden
  }
  .stat{padding:26px 22px;border-right:1px solid var(--c-line);transition:background var(--dur) var(--ease)}
  .stat:last-child{border-right:0}
  .stat:hover{background:rgba(201,242,77,.08)}
  .stat-num{font-family:var(--font-mono);font-size:40px;font-weight:800;letter-spacing:-.03em;color:var(--c-ink);line-height:1}
  .stat-num em{font-style:normal;font-size:16px;font-weight:700;margin-left:4px;color:var(--c-muted)}
  .stat-label{font-size:13px;color:var(--c-muted);margin-top:8px}
  @media (max-width:900px){.stats-row{grid-template-columns:repeat(2,1fr)}.stat:nth-child(2){border-right:0}.stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--c-line)}}
  @media (max-width:520px){.stats-row{grid-template-columns:1fr}.stat{border-right:0;border-bottom:1px solid var(--c-line)}.stat:last-child{border-bottom:0}}

  /* ---------- toc ---------- */
  .toc-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:18px;box-shadow:var(--shadow-1)}
  @media (min-width:1024px){.toc-card{position:sticky;top:96px}}
  .toc-title{font-size:12px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--c-faint);margin-bottom:10px}
  .toc-nav{display:flex;flex-direction:column}
  .toc-link{
    display:block;font-size:14px;color:var(--c-muted);padding:9px 10px;border-radius:8px;
    border-left:2px solid transparent;transition:color var(--dur) var(--ease),background var(--dur) var(--ease),border-color var(--dur) var(--ease)
  }
  .toc-link:hover{color:var(--c-ink);background:rgba(201,242,77,.12)}
  .toc-link.is-current{color:var(--c-ink);font-weight:600;background:rgba(201,242,77,.16);border-left-color:var(--c-accent)}
  .toc-cta{
    display:block;margin-top:14px;padding-top:14px;border-top:1px solid var(--c-line);
    font-size:13px;font-weight:600;color:var(--c-ink);transition:color var(--dur) var(--ease)
  }
  .toc-cta:hover{color:var(--c-accent-press)}

  /* ---------- prose ---------- */
  .prose{max-width:780px}
  .content-block{padding-bottom:44px;scroll-margin-top:110px}
  .content-block + .content-block{border-top:1px solid var(--c-line);padding-top:44px}
  .content-block:last-child{padding-bottom:0}
  .block-title{
    position:relative;padding-left:16px;font-size:clamp(21px,2.6vw,27px);font-weight:700;
    line-height:1.5;letter-spacing:-.01em;color:var(--c-ink);margin-bottom:16px
  }
  .block-title::before{
    content:"";position:absolute;left:0;top:.3em;bottom:.3em;width:3px;border-radius:2px;background:var(--c-accent)
  }
  .block-sub{font-size:15px;color:var(--c-muted);margin-bottom:18px}
  .prose p{margin-bottom:18px;line-height:1.9;color:var(--c-text)}
  .prose strong{font-weight:700;color:var(--c-ink)}
  .num-mono{font-family:var(--font-mono);font-weight:700;color:var(--c-ink)}

  .check-list{list-style:none;margin:22px 0}
  .check-item{
    display:flex;gap:14px;align-items:flex-start;padding:15px 14px;border-radius:10px;
    border-bottom:1px dashed var(--c-line);transition:background var(--dur) var(--ease)
  }
  .check-item:last-child{border-bottom:0}
  .check-item:hover{background:rgba(201,242,77,.06)}
  .check-idx{font-family:var(--font-mono);font-size:15px;font-weight:800;color:var(--c-accent-press);flex:none;width:28px;line-height:1.7}
  .check-body{font-size:15px;color:var(--c-muted);line-height:1.8}
  .check-body b{color:var(--c-ink);font-weight:600}

  .step-list{list-style:none;margin:22px 0;counter-reset:step}
  .step{
    display:flex;gap:16px;padding:18px 16px;border-radius:12px;border:1px solid var(--c-line);
    background:var(--c-surface);box-shadow:var(--shadow-1);margin-bottom:12px;
    transition:box-shadow var(--dur) var(--ease),transform var(--dur) var(--ease),border-color var(--dur) var(--ease)
  }
  .step:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);border-color:rgba(201,242,77,.7)}
  .step-num{font-family:var(--font-mono);font-size:20px;font-weight:800;color:var(--c-ink);flex:none;line-height:1.4}
  .step-body h3{font-size:17px;font-weight:700;color:var(--c-ink);margin-bottom:6px}
  .step-body p{font-size:15px;color:var(--c-muted);margin:0;line-height:1.8}

  .note-box{
    background:var(--c-surface);border:1px solid var(--c-line);border-left:3px solid var(--c-accent);
    border-radius:var(--r-card);padding:20px 22px;margin:24px 0
  }
  .note-box .note-title{font-size:15px;font-weight:700;color:var(--c-ink);margin-bottom:8px}
  .note-box p{font-size:15px;color:var(--c-muted);margin:0}

  .prompt-list{margin:20px 0}
  .prompt-item{
    display:grid;grid-template-columns:minmax(140px,220px) 1fr;gap:16px;
    padding:16px 0;border-bottom:1px dashed var(--c-line)
  }
  .prompt-item:last-child{border-bottom:0}
  .prompt-key{font-size:15px;font-weight:600;color:var(--c-ink)}
  .prompt-key span{display:block;font-family:var(--font-mono);font-size:12px;color:var(--c-faint);font-weight:500;margin-top:2px}
  .prompt-val{font-size:15px;color:var(--c-muted);line-height:1.8}
  @media (max-width:640px){.prompt-item{grid-template-columns:1fr;gap:6px}}

  figure{margin:26px 0}
  figure img{width:100%;border-radius:var(--r-img);border:1px solid var(--c-line);object-fit:cover}
  figcaption{font-size:13px;color:var(--c-faint);text-align:center;margin-top:10px}

  .inline-link{color:var(--c-ink);font-weight:600;border-bottom:2px solid var(--c-accent);transition:color var(--dur) var(--ease)}
  .inline-link:hover{color:var(--c-accent-press)}

  /* ---------- faq ---------- */
  .faq-wrap{max-width:760px;margin:0 auto}
  .faq-head{text-align:center;margin-bottom:32px}
  .faq-head h2{font-size:clamp(24px,3.2vw,36px);font-weight:700;letter-spacing:-.02em;color:var(--c-ink)}
  .faq-head p{font-size:15px;color:var(--c-muted);margin-top:12px}
  .faq-item{
    background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
    margin-bottom:12px;overflow:hidden;transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease)
  }
  .faq-item:hover{box-shadow:var(--shadow-1)}
  .faq-item.is-open{border-color:var(--c-accent);box-shadow:var(--shadow-1)}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;text-align:left;
    padding:20px;font-size:16px;font-weight:600;color:var(--c-ink);transition:color var(--dur) var(--ease)
  }
  .faq-q:hover{color:var(--c-accent-press)}
  .faq-icon{position:relative;width:16px;height:16px;flex:none;transition:transform var(--dur) var(--ease)}
  .faq-icon::before,.faq-icon::after{
    content:"";position:absolute;left:50%;top:50%;background:var(--c-ink);border-radius:2px;transform:translate(-50%,-50%)
  }
  .faq-icon::before{width:14px;height:2px}
  .faq-icon::after{width:2px;height:14px}
  .faq-item.is-open .faq-icon{transform:rotate(180deg)}
  .faq-a{max-height:0;overflow:hidden;transition:max-height 220ms var(--ease)}
  .faq-a-inner{padding:0 20px 20px;font-size:15px;color:var(--c-muted);line-height:1.85}

  /* ---------- cross links ---------- */
  .link-row{display:grid;gap:14px}
  .link-item{
    display:flex;align-items:center;justify-content:space-between;gap:18px;
    background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:20px 22px;
    transition:box-shadow var(--dur) var(--ease),transform var(--dur) var(--ease),border-color var(--dur) var(--ease)
  }
  .link-item:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);border-color:rgba(201,242,77,.7)}
  .link-item h3{font-size:16px;font-weight:700;color:var(--c-ink);margin-bottom:4px}
  .link-item p{font-size:14px;color:var(--c-muted);line-height:1.75}
  .link-arrow{font-family:var(--font-mono);font-size:18px;color:var(--c-accent-press);flex:none;transition:transform var(--dur) var(--ease)}
  .link-item:hover .link-arrow{transform:translateX(4px)}

  .section-head{max-width:760px;margin-bottom:34px}
  .section-head h2{font-size:clamp(24px,3.2vw,36px);font-weight:700;letter-spacing:-.02em;color:var(--c-ink)}
  .section-head p{font-size:15px;color:var(--c-muted);margin-top:12px}

  /* ---------- cta ---------- */
  .section-cta{background:var(--c-ink);color:#fff;padding:72px 0;position:relative;overflow:hidden}
  .section-cta::before{
    content:"";position:absolute;inset:0;opacity:.6;pointer-events:none;
    background-image:repeating-linear-gradient(to bottom,rgba(201,242,77,.07) 0 1px,transparent 1px 56px)
  }
  .cta-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
  .cta-title{font-size:clamp(22px,3vw,32px);font-weight:800;letter-spacing:-.02em;color:#fff}
  .cta-text{font-size:15px;color:rgba(255,255,255,.72);margin-top:10px;max-width:560px}
  .cta-actions{display:flex;gap:12px;flex-wrap:wrap}
  .cta-actions .btn-ghost{border-color:rgba(255,255,255,.6);color:#fff}
  .cta-actions .btn-ghost:hover{background:#fff;color:var(--c-ink);border-color:#fff}

  /* ---------- footer ---------- */
  .site-footer{background:var(--c-ink);color:rgba(255,255,255,.72);padding:64px 0 0;border-top:1px solid rgba(255,255,255,.08)}
  .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:34px;padding-bottom:44px}
  @media (max-width:1023px){.footer-grid{grid-template-columns:1fr 1fr;gap:28px}}
  @media (max-width:560px){.footer-grid{grid-template-columns:1fr}}
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
  .footer-brand .brand-mark{background:var(--c-accent);color:var(--c-ink)}
  .footer-brand .brand-text{color:#fff}
  .footer-desc{font-size:14px;line-height:1.85;color:rgba(255,255,255,.7);max-width:340px}
  .footer-title{font-size:13px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:rgba(255,255,255,.95);margin-bottom:14px}
  .footer-links{display:flex;flex-direction:column;gap:10px}
  .footer-links a{font-size:14px;color:rgba(255,255,255,.72);transition:color var(--dur) var(--ease)}
  .footer-links a:hover{color:var(--c-accent)}
  .footer-meta{font-size:14px;line-height:2;color:rgba(255,255,255,.72)}
  .footer-meta a{color:var(--c-accent);transition:opacity var(--dur) var(--ease)}
  .footer-meta a:hover{opacity:.8}
  .footer-bottom{
    display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
    border-top:1px solid rgba(255,255,255,.12);padding:22px 0;font-size:13px;color:rgba(255,255,255,.6)
  }

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

  /* ---------- mobile nav ---------- */
  @media (max-width:1023px){
    .menu-btn{display:inline-flex}
    .nav-badge{display:none}
    .nav-links{
      position:fixed;left:0;right:0;top:0;bottom:0;z-index:55;
      background:var(--c-ink);flex-direction:column;align-items:stretch;gap:0;
      padding:92px 24px 120px;transform:translateY(-100%);opacity:0;pointer-events:none;
      transition:transform 220ms var(--ease),opacity 220ms var(--ease);overflow-y:auto
    }
    .nav-links.is-open{transform:none;opacity:1;pointer-events:auto}
    .nav-link{
      color:#fff;font-size:18px;font-weight:600;height:52px;display:flex;align-items:center;
      border-bottom:1px solid rgba(255,255,255,.1);padding:0
    }
    .nav-link::after{display:none}
    .nav-link.is-active{color:var(--c-accent)}
  }
  @media (min-width:1024px){
    .nav-links{transform:none !important;opacity:1 !important;pointer-events:auto !important}
  }

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

/* roulang page: article */
:root{
  --c-ink:#0F1512;
  --c-ink-soft:#1B211E;
  --c-accent:#C9F24D;
  --c-accent-press:#A8D62F;
  --c-flame:#FF5B2E;
  --c-bg:#F6F5F1;
  --c-surface:#FFFFFF;
  --c-line:#E3E2DB;
  --c-text:#1B1F1D;
  --c-text-muted:#5C6360;
  --c-text-faint:#8B918D;
  --c-ok:#1FA971;
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --dur:180ms;
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow-card:0 1px 2px rgba(15,21,18,.04);
  --shadow-hover:0 12px 32px rgba(15,21,18,.10);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --font-mono:"DIN Alternate","JetBrains Mono",ui-monospace,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
html body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
p,h1,h2,h3,h4,figure{margin:0}
[id]{scroll-margin-top:96px}
a:focus-visible,button:focus-visible,summary:focus-visible,.btn:focus-visible{
  outline:2px solid var(--c-accent);
  outline-offset:2px;
}
@keyframes fade-up{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@keyframes ticker{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@keyframes flip-num{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}
@keyframes underline-sweep{from{transform:scaleX(0)}to{transform:scaleX(1)}}

.shell{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}
@media (max-width:640px){.shell{padding-left:16px;padding-right:16px}}

/* 顶部阅读进度 */
.reading-bar{position:fixed;top:0;left:0;height:3px;width:0;background:var(--c-accent);z-index:90;transition:width .1s linear}

/* 导航 */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,245,241,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.site-header.is-scrolled{
  background:var(--c-surface);
  border-bottom-color:var(--c-line);
  box-shadow:0 8px 24px rgba(15,21,18,.06);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:32px;height:32px;border-radius:10px;background:var(--c-ink);color:var(--c-accent);
  display:grid;place-items:center;font-size:15px;font-weight:800;letter-spacing:0;
}
.brand-text{font-size:17px;font-weight:800;letter-spacing:-.02em;color:var(--c-ink);white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  padding:10px 12px;font-size:14px;font-weight:500;color:var(--c-text-muted);
  border-radius:8px;transition:color var(--dur) var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:5px;height:2px;
  background:var(--c-accent);transform:scaleX(0);transform-origin:left;
  transition:transform var(--dur) var(--ease);
}
.nav-link:hover{color:var(--c-ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--c-ink);font-weight:700}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:12px;flex-shrink:0}
.nav-badge{
  font-size:12px;font-weight:600;line-height:1;padding:6px 10px;border-radius:999px;
  background:var(--c-flame);color:#fff;letter-spacing:.02em;white-space:nowrap;
}
.menu-btn{
  display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--c-line);
  background:var(--c-surface);position:relative;
}
.menu-btn span,.menu-btn span::before,.menu-btn span::after{
  position:absolute;left:50%;width:16px;height:2px;background:var(--c-ink);border-radius:2px;
  transform:translateX(-50%);transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.menu-btn span{top:50%;margin-top:-1px}
.menu-btn span::before{content:"";left:0;top:-5px;transform:none}
.menu-btn span::after{content:"";left:0;top:5px;transform:none}
body.nav-open .menu-btn span{background:var(--c-accent)}
body.nav-open .menu-btn span::before{transform:translateY(5px) rotate(45deg)}
body.nav-open .menu-btn span::after{transform:translateY(-5px) rotate(-45deg)}
.drawer-cta{display:none}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:12px 20px;border-radius:var(--r-btn);border:1.5px solid transparent;
  font-size:15px;font-weight:700;line-height:1.2;cursor:pointer;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),transform var(--dur) var(--ease),
             box-shadow var(--dur) var(--ease);
}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-primary{background:var(--c-accent);color:var(--c-ink);border-color:var(--c-accent)}
.btn-primary:hover{background:var(--c-accent-press);border-color:var(--c-accent-press);transform:translateY(1px)}
.btn-primary:active{transform:translateY(2px);box-shadow:inset 0 2px 6px rgba(15,21,18,.18)}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn-outline-light:hover{background:var(--c-accent);color:var(--c-ink);border-color:var(--c-accent);transform:translateY(1px)}
.link-arrow{position:relative;display:inline-block;font-size:14px;font-weight:600;color:var(--c-ink);padding-bottom:4px}
.link-arrow::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--c-accent);
  transform:scaleX(0);transform-origin:left;transition:transform var(--dur) var(--ease);
}
.link-arrow:hover::after{transform:scaleX(1)}

/* 文章头部 */
.article-head-band{background:var(--c-bg);padding:32px 0 44px;border-bottom:1px solid var(--c-line)}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-text-faint)}
.crumbs a{color:var(--c-text-muted);transition:color var(--dur) var(--ease)}
.crumbs a:hover{color:var(--c-ink)}
.crumbs .sep{color:#C7C6BF}
.crumbs .current{color:var(--c-text-faint);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:340px}
.article-title{
  margin-top:18px;max-width:900px;
  font-size:32px;line-height:1.25;font-weight:800;letter-spacing:-.02em;color:var(--c-ink);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;margin-top:20px;font-size:14px;color:var(--c-text-muted)}
.meta-tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;color:var(--c-ink);
  background:rgba(201,242,77,.35);border:1px solid rgba(201,242,77,.85);
  padding:4px 10px;border-radius:999px;
}
.meta-tag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-accent-press)}
.meta-mono{font-family:var(--font-mono);font-size:13px;letter-spacing:-.01em;color:var(--c-text-muted)}
.meta-sep{width:3px;height:3px;border-radius:50%;background:#C7C6BF;display:inline-block}
@media (min-width:1024px){.article-title{font-size:44px}}

/* 正文区 */
.article-main{background:var(--c-surface);padding:44px 0 72px}
.article-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:36px}
@media (min-width:1024px){
  .article-grid{grid-template-columns:minmax(0,760px) 240px;justify-content:center;gap:56px}
}
.article-body{
  font-size:17px;line-height:1.9;color:#262B28;min-width:0;
  overflow-x:auto;overflow-wrap:anywhere;word-break:break-word;
}
.post-cover{
  margin:0 0 30px;border-radius:var(--r-img);overflow:hidden;
  border:1px solid var(--c-line);background:var(--c-bg);
}
.post-cover img{width:100%;height:auto;transition:transform .3s var(--ease)}
.post-cover:hover img{transform:scale(1.03)}
.article-body p{margin:1.2em 0}
.article-body h2{
  margin:40px 0 16px;padding-left:14px;border-left:3px solid var(--c-accent);
  font-size:26px;line-height:1.4;font-weight:700;letter-spacing:-.01em;color:var(--c-ink);
}
.article-body h3{margin:28px 0 12px;font-size:19px;line-height:1.5;font-weight:600;color:var(--c-ink)}
.article-body h4{margin:22px 0 10px;font-size:17px;font-weight:600;color:var(--c-ink)}
.article-body strong{color:var(--c-ink);font-weight:700}
.article-body ul,.article-body ol{margin:16px 0}
.article-body ul>li{position:relative;padding-left:22px;margin:10px 0}
.article-body ul>li::before{
  content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;
  background:var(--c-accent);border-radius:2px;
}
.article-body ol{counter-reset:li}
.article-body ol>li{position:relative;padding-left:34px;margin:10px 0;counter-increment:li}
.article-body ol>li::before{
  content:counter(li);position:absolute;left:0;top:0;
  font-family:var(--font-mono);font-size:15px;font-weight:700;color:var(--c-accent-press);
}
.article-body blockquote{
  margin:24px 0;padding:20px 22px;background:var(--c-bg);
  border-left:3px solid var(--c-accent);
  border-radius:0 var(--r-card) var(--r-card) 0;
  color:var(--c-text-muted);
}
.article-body img{border-radius:var(--r-img);margin:24px auto;width:auto;max-width:100%}
.article-body figure{margin:24px 0}
.article-body figcaption{margin-top:10px;font-size:13px;color:var(--c-text-faint);text-align:center}
.article-body a{
  color:var(--c-ink);border-bottom:1.5px solid var(--c-accent);padding-bottom:1px;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.article-body a:hover{color:var(--c-accent-press);border-bottom-color:var(--c-accent-press)}
.article-body code{
  font-family:var(--font-mono);font-size:.88em;background:var(--c-bg);
  border:1px solid var(--c-line);border-radius:6px;padding:2px 6px;
}
.article-body pre{
  margin:22px 0;padding:18px;background:var(--c-ink);color:#E6EFE8;
  border-radius:var(--r-card);overflow-x:auto;
  font-family:var(--font-mono);font-size:14px;line-height:1.7;
}
.article-body pre code{background:none;border:0;padding:0;color:inherit}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;margin:22px 0}
.article-body th,.article-body td{border:1px solid var(--c-line);padding:10px 12px;text-align:left}
.article-body thead th{background:rgba(201,242,77,.28);color:var(--c-ink);font-weight:700}
.article-body tbody tr:nth-child(even){background:var(--c-bg)}
.article-body hr{border:0;border-top:1px solid var(--c-line);margin:32px 0}
.empty-state{
  border:1px dashed var(--c-line);border-radius:var(--r-card);
  padding:48px 24px;text-align:center;background:var(--c-bg);
}
.empty-title{font-size:20px;font-weight:700;color:var(--c-ink)}
.empty-desc{margin:12px auto 22px;max-width:460px;font-size:15px;color:var(--c-text-muted)}

/* 目录 */
.toc-side{min-width:0}
.toc-card{
  display:none;position:sticky;top:100px;
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);padding:18px;box-shadow:var(--shadow-card);
}
.toc-title{
  font-size:12px;font-weight:700;letter-spacing:.12em;color:var(--c-text-faint);
  margin-bottom:12px;
}
.toc-list a{
  display:block;font-size:13px;line-height:1.6;color:var(--c-text-muted);
  padding:7px 0 7px 12px;border-left:2px solid var(--c-line);
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.toc-list a:hover{color:var(--c-ink);border-left-color:var(--c-accent)}
.toc-list a.is-current{color:var(--c-ink);font-weight:700;border-left-color:var(--c-accent)}
.toc-list a.lvl-3{padding-left:24px;font-size:12.5px}
.toc-cta{
  display:flex;align-items:center;justify-content:center;margin-top:16px;
  padding:10px 12px;border-radius:var(--r-btn);background:var(--c-ink);color:var(--c-accent);
  font-size:13px;font-weight:700;transition:background var(--dur) var(--ease),color var(--dur) var(--ease);
}
.toc-cta:hover{background:var(--c-accent);color:var(--c-ink)}
.toc-mobile{
  display:block;margin-bottom:28px;background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;
}
.toc-mobile summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
  padding:14px 16px;font-size:14px;font-weight:600;color:var(--c-ink);
}
.toc-mobile summary::-webkit-details-marker{display:none}
.toc-mobile summary::after{
  content:"+";font-size:18px;line-height:1;color:var(--c-accent-press);
  transition:transform var(--dur) var(--ease);
}
.toc-mobile[open] summary::after{transform:rotate(45deg)}
.toc-mobile .toc-list{padding:0 16px 14px}
@media (min-width:1024px){
  .toc-card{display:block}
  .toc-mobile{display:none}
}

/* 上下篇 */
.post-nav-band{background:var(--c-bg);padding:56px 0}
.post-nav{display:grid;grid-template-columns:1fr;gap:16px}
.post-nav-item{
  display:block;padding:20px;background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--shadow-card);
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.post-nav-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:rgba(201,242,77,.7)}
.pn-label{font-size:12px;font-weight:700;letter-spacing:.1em;color:var(--c-text-faint)}
.pn-title{display:block;margin-top:8px;font-size:17px;font-weight:600;line-height:1.5;color:var(--c-ink)}
@media (min-width:768px){.post-nav{grid-template-columns:1fr 1fr}}
.post-nav-back{display:flex;justify-content:center;margin-top:24px}

/* 相关推荐 */
.related-band{background:var(--c-surface);padding:64px 0}
.related-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:28px}
.eyebrow{font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--c-accent-press);margin-bottom:8px}
.section-title{font-size:26px;line-height:1.3;font-weight:700;letter-spacing:-.01em;color:var(--c-ink)}
@media (min-width:1024px){.section-title{font-size:38px}}
.related-grid{display:grid;grid-template-columns:1fr;gap:24px}
@media (min-width:640px){.related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.related-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.card{
  display:flex;flex-direction:column;gap:14px;
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);padding:14px;box-shadow:var(--shadow-card);
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:rgba(201,242,77,.7)}
.card-cover{
  position:relative;aspect-ratio:16/9;border-radius:var(--r-img);overflow:hidden;
  border:1px solid var(--c-line);
  background-color:#FBFAF6;
  background-image:repeating-linear-gradient(0deg,transparent 0 15px,rgba(201,242,77,.35) 15px 16px);
}
.card-cover::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--c-accent)}
.card-cover::after{
  content:"";position:absolute;right:14px;bottom:12px;
  width:26px;height:26px;border-radius:8px;background:var(--c-ink);
}
.card-body{display:flex;flex-direction:column;gap:8px;flex:1;padding:0 4px 4px}
.tag{display:inline-flex;align-items:center;gap:6px;font-size:11px;font-weight:700;letter-spacing:.08em;color:var(--c-text-muted)}
.tag::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--c-accent)}
.card-title{
  font-size:17px;font-weight:700;line-height:1.5;color:var(--c-ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card:hover .card-title{color:var(--c-ink)}
.card-excerpt{
  font-size:14px;line-height:1.75;color:var(--c-text-muted);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.card-meta{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:auto;padding-top:12px;border-top:1px dashed var(--c-line);
  font-size:13px;color:var(--c-text-faint);
}
.card-read{font-weight:600;color:var(--c-ink);transition:color var(--dur) var(--ease)}
.card:hover .card-read{color:var(--c-accent-press)}

/* 底部 CTA */
.cta-band{background:var(--c-bg);padding:0 0 72px}
.cta-inner{
  position:relative;overflow:hidden;background:var(--c-ink);color:#fff;
  border-radius:20px;padding:36px 28px;
  display:grid;grid-template-columns:1fr;gap:24px;
}
.cta-inner::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;opacity:.16;
}
.cta-inner::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(0deg,transparent 0 23px,rgba(255,255,255,.05) 23px 24px);
}
.cta-copy,.cta-actions{position:relative;z-index:1}
.cta-title{font-size:26px;line-height:1.3;font-weight:700;letter-spacing:-.01em;color:#fff}
.cta-desc{margin-top:12px;max-width:560px;font-size:15px;line-height:1.8;color:rgba(255,255,255,.72)}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
@media (min-width:900px){
  .cta-inner{grid-template-columns:1.5fr .9fr;align-items:center;padding:52px}
  .cta-title{font-size:32px}
  .cta-actions{justify-content:flex-end}
}

/* 页脚 */
.site-footer{background:var(--c-ink);color:rgba(255,255,255,.72);padding:64px 0 0;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media (min-width:640px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.1fr}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .brand-mark{background:var(--c-accent);color:var(--c-ink)}
.footer-brand .brand-text{color:#fff;font-size:17px;font-weight:800}
.footer-desc{max-width:340px;line-height:1.8;color:rgba(255,255,255,.68)}
.footer-title{margin-bottom:14px;font-size:14px;font-weight:700;letter-spacing:.06em;color:rgba(255,255,255,.95)}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{color:rgba(255,255,255,.72);transition:color var(--dur) var(--ease)}
.footer-links a:hover{color:var(--c-accent)}
.footer-meta{line-height:2;color:rgba(255,255,255,.7)}
.footer-meta a{color:var(--c-accent)}
.footer-bottom{
  margin-top:48px;padding:20px 0 28px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.55);
}

/* 进场动效 */
.reveal{opacity:0}
.reveal.in{animation:fade-up .5s var(--ease) forwards}

@media (max-width:900px){
  .menu-btn{display:block}
  .nav-links{
    position:fixed;left:0;right:0;top:0;bottom:0;z-index:55;
    flex-direction:column;align-items:stretch;gap:0;justify-content:flex-start;
    padding:96px 24px 32px;background:var(--c-ink);
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility var(--dur) var(--ease);
  }
  body.nav-open .nav-links{opacity:1;visibility:visible;transform:translateY(0)}
  .nav-link{
    color:rgba(255,255,255,.86);font-size:17px;font-weight:600;
    height:52px;padding:0 4px;border-bottom:1px solid rgba(255,255,255,.08);border-radius:0;
  }
  .nav-link::after{display:none}
  .nav-link.is-active{color:var(--c-accent)}
  body.nav-open .site-header{background:transparent;border-bottom-color:transparent;box-shadow:none;backdrop-filter:none}
  body.nav-open .brand-text{color:#fff}
  body.nav-open .brand-mark{background:var(--c-accent);color:var(--c-ink)}
  .nav-badge{display:none}
  .drawer-cta{
    display:flex;align-items:center;justify-content:center;margin-top:auto;
    height:48px;border-radius:var(--r-btn);background:var(--c-accent);color:var(--c-ink);
    font-size:15px;font-weight:700;
  }
}
@media (max-width:520px){
  .brand-text{font-size:14px}
  .nav-right .btn-sm{padding:8px 12px;font-size:12.5px}
  .article-title{font-size:26px}
  .crumbs .current{max-width:180px}
}
@media (max-width:400px){
  .nav-right .btn-sm{display:none}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
  .reveal{opacity:1 !important;animation:none !important}
}

/* roulang page: category2 */
:root{
  --c-ink:#0F1512;
  --c-ink-soft:#1B211E;
  --c-accent:#C9F24D;
  --c-accent-press:#A8D62F;
  --c-flame:#FF5B2E;
  --c-bg:#F6F5F1;
  --c-surface:#FFFFFF;
  --c-line:#E3E2DB;
  --c-text:#1B1F1D;
  --c-muted:#5C6360;
  --c-faint:#8B918D;
  --c-ok:#1FA971;
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --dur:.2s;
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow-1:0 1px 2px rgba(15,21,18,.04);
  --shadow-2:0 12px 32px rgba(15,21,18,.10);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --font-mono:"DIN Alternate","JetBrains Mono",ui-monospace,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:6px}
.shell{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.mono{font-family:var(--font-mono);letter-spacing:-.01em}

/* ---------- 顶部通告 ---------- */
.topbar{
  background:var(--c-ink);
  color:rgba(255,255,255,.82);
  font-size:13px;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.topbar-inner{
  display:flex;align-items:center;gap:14px;
  min-height:38px;flex-wrap:wrap;
}
.topbar .dot{
  display:inline-block;width:7px;height:7px;border-radius:999px;
  background:var(--c-ok);margin-right:7px;vertical-align:middle;
  box-shadow:0 0 0 3px rgba(31,169,113,.18);
}
.topbar-strong{color:var(--c-accent);font-weight:600}
.topbar-sep{flex:1}
.topbar a{color:rgba(255,255,255,.86);border-bottom:1px solid rgba(201,242,77,.4)}
.topbar a:hover{color:var(--c-accent)}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,245,241,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.site-header.is-solid{
  background:var(--c-surface);
  border-bottom-color:var(--c-line);
  box-shadow:0 1px 12px rgba(15,21,18,.05);
}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:20px;min-height:68px;
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:32px;height:32px;border-radius:10px;
  background:var(--c-ink);color:var(--c-accent);
  display:flex;align-items:center;justify-content:center;
  font-size:16px;font-weight:800;
  position:relative;overflow:hidden;
}
.brand-mark::after{
  content:"";position:absolute;left:-6px;right:-6px;bottom:6px;height:1px;
  background:rgba(201,242,77,.55);
}
.brand-text{font-size:16px;font-weight:800;letter-spacing:-.01em;color:var(--c-ink)}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-link{
  position:relative;display:inline-block;
  padding:8px 12px;font-size:14px;font-weight:500;color:var(--c-muted);
  border-radius:8px;transition:color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:3px;height:2px;
  background:var(--c-accent);transform:scaleX(0);transform-origin:left;
  transition:transform 180ms var(--ease);
}
.nav-link:hover{color:var(--c-ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--c-ink);font-weight:700}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:12px}
.nav-badge{
  display:inline-flex;align-items:center;height:22px;padding:0 10px;
  border-radius:999px;background:var(--c-flame);color:#fff;
  font-size:11px;font-weight:700;letter-spacing:.04em;white-space:nowrap;
}
.menu-btn{
  display:none;width:42px;height:42px;border:1px solid var(--c-line);
  border-radius:10px;background:var(--c-surface);
  align-items:center;justify-content:center;
  transition:border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.menu-btn:hover{border-color:var(--c-accent-press)}
.menu-btn span,.menu-btn span::before,.menu-btn span::after{
  display:block;width:18px;height:2px;background:var(--c-ink);border-radius:2px;position:relative;
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.menu-btn span::before,.menu-btn span::after{content:"";position:absolute;left:0}
.menu-btn span::before{top:-6px}
.menu-btn span::after{top:6px}
.menu-btn.is-open span{background:transparent}
.menu-btn.is-open span::before{transform:translateY(6px) rotate(45deg)}
.menu-btn.is-open span::after{transform:translateY(-6px) rotate(-45deg)}

/* 移动抽屉 */
.drawer{
  position:fixed;inset:68px 0 0 0;z-index:55;
  background:var(--c-ink);
  padding:24px;
  display:flex;flex-direction:column;gap:8px;
  transform:translateY(-12px);opacity:0;pointer-events:none;
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease);
  overflow-y:auto;
}
.drawer.is-open{opacity:1;transform:translateY(0);pointer-events:auto}
.drawer a.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  min-height:52px;padding:0 4px;
  color:rgba(255,255,255,.92);font-size:16px;font-weight:600;
  border-bottom:1px solid rgba(255,255,255,.10);
}
.drawer a.drawer-link.is-active{color:var(--c-accent)}
.drawer a.drawer-link:hover{color:var(--c-accent)}
.drawer-cta{margin-top:20px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;border:1.5px solid transparent;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),transform 160ms var(--ease),
             box-shadow var(--dur) var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--c-accent);color:var(--c-ink)}
.btn-primary:hover{background:var(--c-accent-press);transform:translateY(1px)}
.btn-primary:active{transform:translateY(2px);box-shadow:inset 0 2px 6px rgba(15,21,18,.18)}
.btn-ghost{background:transparent;color:var(--c-ink);border-color:var(--c-ink)}
.btn-ghost:hover{background:var(--c-ink);color:var(--c-accent)}
.btn-ghost:active{transform:translateY(1px)}
.btn-light{background:var(--c-accent);color:var(--c-ink)}
.btn-light:hover{background:var(--c-accent-press);transform:translateY(1px)}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn-outline-light:hover{background:rgba(255,255,255,.1);border-color:#fff}
.btn-sm{height:38px;padding:0 16px;font-size:13.5px;border-radius:9px}
.link-more{
  position:relative;display:inline-block;font-size:14px;font-weight:600;color:var(--c-ink);
}
.link-more::after{
  content:"";position:absolute;left:0;right:0;bottom:-3px;height:2px;background:var(--c-accent);
  transform:scaleX(0);transform-origin:left;transition:transform 180ms var(--ease);
}
.link-more:hover::after{transform:scaleX(1)}

/* ---------- 页头 Hero ---------- */
.pg-hero{
  position:relative;background:var(--c-ink);color:#fff;overflow:hidden;
}
.pg-hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  opacity:.34;
}
.pg-hero-mask{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(15,21,18,.86) 0%,rgba(15,21,18,.72) 55%,rgba(15,21,18,.94) 100%);
}
.pg-hero-lines{
  position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(to bottom,rgba(255,255,255,.06) 0 1px,transparent 1px 46px);
  opacity:.5;
}
.pg-hero-content{position:relative;z-index:2;padding:56px 0 64px}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.62);margin-bottom:20px;flex-wrap:wrap}
.crumb a{color:rgba(255,255,255,.72)}
.crumb a:hover{color:var(--c-accent)}
.crumb .sep{color:rgba(255,255,255,.32)}
.crumb .now{color:rgba(255,255,255,.9)}
.pg-hero h1{
  font-size:34px;line-height:1.28;font-weight:800;letter-spacing:-.02em;
  max-width:900px;
}
.pg-hero h1 em{font-style:normal;color:var(--c-accent)}
.pg-hero-sub{
  margin-top:18px;font-size:17px;line-height:1.85;
  color:rgba(255,255,255,.78);max-width:780px;
}
.pg-hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.badge-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;border-radius:999px;
  border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.05);
  font-size:13px;color:rgba(255,255,255,.84);
}
.badge .pt{width:7px;height:7px;border-radius:999px;background:var(--c-ok)}
.badge.is-flame .pt{background:var(--c-flame)}
.badge.is-accent .pt{background:var(--c-accent)}

/* ---------- 通用板块 ---------- */
.sect{padding:72px 0}
.sect-bg{background:var(--c-bg)}
.sect-surface{background:var(--c-surface)}
.sect-ink{background:var(--c-ink);color:#fff}
.sect-head{max-width:760px;margin-bottom:38px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--c-muted);margin-bottom:12px;
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--c-accent);display:block}
.sect-ink .eyebrow{color:rgba(255,255,255,.6)}
.sect h2{font-size:27px;line-height:1.35;font-weight:700;letter-spacing:-.015em}
.sect h3{font-size:19px;font-weight:600}
.lead{color:var(--c-muted);font-size:16.5px;margin-top:14px}
.sect-ink .lead{color:rgba(255,255,255,.72)}
.hr-line{height:1px;background:var(--c-line);border:0;margin:0}

/* ---------- 导语 ---------- */
.intro-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:40px;align-items:start}
.intro-text p+p{margin-top:16px}
.intro-facts{
  border:1px solid var(--c-line);border-radius:var(--r-card);background:var(--c-surface);
  padding:26px;box-shadow:var(--shadow-1);
}
.intro-facts h3{font-size:17px;margin-bottom:6px}
.fact-list li{
  display:flex;gap:14px;padding:14px 0;border-bottom:1px dashed var(--c-line);
  transition:background var(--dur) var(--ease);
}
.fact-list li:last-child{border-bottom:0}
.fact-list li:hover{background:rgba(201,242,77,.06)}
.fact-num{font-family:var(--font-mono);font-size:20px;font-weight:800;color:var(--c-accent-press);min-width:30px;line-height:1.4}
.fact-list strong{display:block;font-size:15px;font-weight:700}
.fact-list span.desc{font-size:14px;color:var(--c-muted)}

/* ---------- 卡片矩阵（不对称 2 列） ---------- */
.matrix{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:24px}
.card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--shadow-1);
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:rgba(201,242,77,.7)}
.card-main{overflow:hidden;display:flex;flex-direction:column}
.card-media{overflow:hidden;border-radius:var(--r-img);margin:0}
.card-main .card-media{border-radius:0;aspect-ratio:16/9}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform 220ms var(--ease)}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:26px}
.card-tag{
  display:inline-flex;align-items:center;gap:7px;
  font-size:11px;font-weight:700;letter-spacing:.1em;color:var(--c-muted);
  text-transform:uppercase;
}
.card-tag::before{content:"";width:6px;height:6px;border-radius:999px;background:var(--c-accent)}
.card-main h3{margin-top:12px;font-size:21px}
.card-main .card-body p{margin-top:12px;color:var(--c-muted);font-size:15.5px}
.spec-list{margin-top:18px;display:grid;gap:10px}
.spec-list li{
  display:flex;justify-content:space-between;gap:16px;
  font-size:14px;padding-bottom:10px;border-bottom:1px solid var(--c-line);
}
.spec-list li:last-child{border-bottom:0;padding-bottom:0}
.spec-list .k{color:var(--c-muted)}
.spec-list .v{font-weight:700}
.spec-list .v.mono{font-family:var(--font-mono)}
.side-stack{display:grid;gap:24px;align-content:start}
.mini-card{padding:24px}
.mini-card h3{font-size:18px}
.mini-card p{margin-top:10px;color:var(--c-muted);font-size:14.5px}
.chip-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.chip{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;
  border-radius:999px;border:1px solid var(--c-line);background:var(--c-bg);
  font-size:12.5px;color:var(--c-muted);
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.chip:hover{background:rgba(201,242,77,.18);border-color:rgba(201,242,77,.8);color:var(--c-ink)}

/* ---------- 对比表 ---------- */
.table-wrap{
  overflow-x:auto;border:1px solid var(--c-line);border-radius:var(--r-card);
  background:var(--c-surface);box-shadow:var(--shadow-1);
}
table.compare{width:100%;min-width:820px;border-collapse:collapse;font-size:14.5px}
table.compare thead th{
  background:var(--c-accent);color:var(--c-ink);
  text-align:left;font-weight:700;font-size:13.5px;
  padding:14px 18px;white-space:nowrap;
  border-right:1px solid rgba(15,21,18,.10);
}
table.compare thead th:last-child{border-right:0}
table.compare tbody td{
  padding:15px 18px;border-bottom:1px solid var(--c-line);
  vertical-align:top;color:var(--c-muted);
}
table.compare tbody tr:nth-child(even){background:rgba(15,21,18,.028)}
table.compare tbody tr:last-child td{border-bottom:0}
table.compare tbody td:first-child{font-weight:700;color:var(--c-ink);white-space:nowrap}
table.compare tbody tr:hover{background:rgba(201,242,77,.10)}
.table-note{
  margin-top:14px;font-size:13px;color:var(--c-faint);
}
.table-note .mono{color:var(--c-muted)}

/* ---------- 流程 / 时间线 ---------- */
.timeline{position:relative;padding-left:30px}
.timeline::before{
  content:"";position:absolute;left:8px;top:8px;bottom:8px;width:1px;background:var(--c-line);
}
.timeline-item{position:relative;padding:0 0 30px 0}
.timeline-item:last-child{padding-bottom:0}
.timeline-item::before{
  content:"";position:absolute;left:-30px;top:8px;width:17px;height:17px;border-radius:999px;
  background:var(--c-surface);border:2px solid var(--c-accent);
}
.timeline-item strong{display:block;font-size:17px;font-weight:700}
.timeline-item p{color:var(--c-muted);font-size:15px;margin-top:6px}
.step-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px 40px}
.step-no{
  font-family:var(--font-mono);font-size:15px;font-weight:800;color:var(--c-accent-press);
  display:inline-block;margin-bottom:8px;
}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  margin-bottom:12px;overflow:hidden;
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.faq-item:hover{border-color:rgba(201,242,77,.75)}
.faq-item.is-open{border-color:var(--c-accent);box-shadow:var(--shadow-1)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px;background:none;border:0;text-align:left;
  font-size:16px;font-weight:600;color:var(--c-text);
}
.faq-q:hover{color:var(--c-ink)}
.faq-icon{
  flex-shrink:0;width:24px;height:24px;border-radius:999px;
  border:1px solid var(--c-line);background:var(--c-bg);
  display:flex;align-items:center;justify-content:center;
  font-size:15px;line-height:1;color:var(--c-ink);font-weight:700;
  transition:transform 200ms var(--ease),background var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.faq-item.is-open .faq-icon{transform:rotate(180deg);background:var(--c-accent);border-color:var(--c-accent)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 260ms var(--ease)}
.faq-a-inner{padding:0 20px 20px;color:var(--c-muted);font-size:15px;line-height:1.85}
.faq-a-inner p+p{margin-top:10px}

/* ---------- 频道内链 ---------- */
.channel-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.channel-card{
  display:flex;flex-direction:column;gap:12px;
  padding:26px;border:1px solid var(--c-line);border-radius:var(--r-card);
  background:var(--c-surface);box-shadow:var(--shadow-1);
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.channel-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:rgba(201,242,77,.7)}
.channel-card h3{font-size:18px}
.channel-card p{color:var(--c-muted);font-size:14.5px}
.channel-card .go{
  margin-top:auto;font-size:13.5px;font-weight:700;color:var(--c-ink);
  display:inline-flex;align-items:center;gap:6px;
}
.channel-card:hover .go{color:var(--c-accent-press)}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;background:var(--c-ink);color:#fff;overflow:hidden;
  padding:64px 0;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(to bottom,rgba(255,255,255,.05) 0 1px,transparent 1px 40px);
  opacity:.6;
}
.cta-band-inner{
  position:relative;z-index:2;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band h2{font-size:28px;font-weight:800;letter-spacing:-.02em}
.cta-band p{margin-top:12px;color:rgba(255,255,255,.72);max-width:620px;font-size:15.5px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-ink);color:rgba(255,255,255,.72);padding:64px 0 0}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{background:var(--c-accent);color:var(--c-ink)}
.footer-brand .brand-mark::after{background:rgba(15,21,18,.35)}
.footer-brand .brand-text{color:#fff}
.footer-desc{font-size:14px;line-height:1.85;max-width:340px}
.footer-title{color:rgba(255,255,255,.95);font-size:15px;font-weight:700;margin-bottom:16px}
.footer-links{display:grid;gap:10px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.72);transition:color var(--dur) var(--ease)}
.footer-links a:hover{color:var(--c-accent)}
.footer-meta{font-size:14px;line-height:2}
.footer-meta a{color:var(--c-accent);border-bottom:1px solid rgba(201,242,77,.4)}
.footer-meta a:hover{color:#fff}
.footer-bottom{
  margin-top:48px;padding:20px 0 26px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.55);
}

/* ---------- 滚动淡入 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 420ms var(--ease),transform 420ms var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .intro-grid{grid-template-columns:1fr}
  .matrix{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .pg-hero h1{font-size:30px}
}
@media (max-width:900px){
  .nav-links{display:none}
  .menu-btn{display:inline-flex}
  .nav-badge{display:none}
}
@media (max-width:768px){
  .shell{padding:0 16px}
  .sect{padding:56px 0}
  .sect h2{font-size:23px}
  .pg-hero-content{padding:40px 0 48px}
  .pg-hero h1{font-size:26px}
  .pg-hero-sub{font-size:15.5px}
  .step-grid{grid-template-columns:1fr}
  .channel-grid{grid-template-columns:1fr}
  .cta-band{padding:48px 0}
  .cta-band h2{font-size:23px}
  .footer-grid{grid-template-columns:1fr}
  .topbar-inner{font-size:12px}
}
@media (max-width:520px){
  .pg-hero-actions .btn{width:100%}
  .card-body{padding:20px}
  .brand-text{font-size:15px}
  .drawer{inset:64px 0 0 0;padding:18px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category3 */
:root{
  --c-ink:#0F1512;
  --c-ink-soft:#1B211E;
  --c-accent:#C9F24D;
  --c-accent-press:#A8D62F;
  --c-flame:#FF5B2E;
  --c-bg:#F6F5F1;
  --c-surface:#FFFFFF;
  --c-line:#E3E2DB;
  --c-text:#1B1F1D;
  --c-muted:#5C6360;
  --c-faint:#8B918D;
  --c-ok:#1FA971;
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --dur:180ms;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --font-mono:"DIN Alternate","JetBrains Mono",ui-monospace,monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  background:var(--c-bg);
  color:var(--c-text);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0}
h1,h2,h3{margin:0;color:var(--c-ink)}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:4px}

.shell{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (max-width:640px){.shell{padding:0 16px}}

.section-bg{background:var(--c-bg);padding:56px 0}
.section-surface{background:var(--c-surface);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);padding:56px 0}
@media (min-width:1024px){
  .section-bg,.section-surface{padding:96px 0}
}

.sec-head{max-width:760px;margin-bottom:34px}
.sec-head h2{font-size:26px;line-height:1.36;font-weight:700;letter-spacing:-.01em;margin-bottom:10px}
.sec-head p{color:var(--c-muted);font-size:15px;line-height:1.8}
@media (min-width:1024px){
  .sec-head h2{font-size:36px}
  .sec-head p{font-size:16px}
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-weight:700;
  line-height:1;
  border-radius:var(--r-btn);
  border:1.5px solid transparent;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
  white-space:nowrap;
}
.btn-sm{padding:10px 16px;font-size:13px}
.btn-lg{padding:15px 28px;font-size:16px}
.btn-block{width:100%}
.btn-primary{background:var(--c-accent);color:var(--c-ink)}
.btn-primary:hover{background:var(--c-accent-press);transform:translateY(1px)}
.btn-primary:active{transform:translateY(2px);box-shadow:inset 0 2px 6px rgba(15,21,18,.20)}
.btn-ghost{background:transparent;border-color:var(--c-ink);color:var(--c-ink)}
.btn-ghost:hover{background:var(--c-ink);color:var(--c-accent)}
.btn-ghost-light{background:transparent;border-color:rgba(255,255,255,.45);color:#fff}
.btn-ghost-light:hover{background:var(--c-accent);border-color:var(--c-accent);color:var(--c-ink)}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow var(--dur) var(--ease);
}
.site-header.is-scrolled{box-shadow:0 6px 22px rgba(15,21,18,.07)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:22px;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800}
.brand-mark{
  width:32px;height:32px;flex:0 0 auto;
  border-radius:10px;
  background:var(--c-ink);
  color:var(--c-accent);
  display:flex;align-items:center;justify-content:center;
  font-size:16px;font-weight:800;letter-spacing:0;
}
.brand-text{font-size:17px;font-weight:800;color:var(--c-ink);letter-spacing:-.01em;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-link{
  position:relative;
  font-size:14px;
  font-weight:500;
  color:var(--c-muted);
  padding:6px 0;
  transition:color var(--dur) var(--ease);
}
.nav-link::after{
  content:'';
  position:absolute;
  left:0;bottom:0;
  width:100%;height:2px;
  background:var(--c-accent);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform var(--dur) var(--ease);
}
.nav-link:hover{color:var(--c-ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--c-ink);font-weight:700}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:12px}
.nav-badge{
  display:inline-flex;align-items:center;
  background:var(--c-flame);
  color:#fff;
  font-size:11px;font-weight:700;
  padding:4px 10px;border-radius:999px;
  line-height:1.5;height:22px;
}
.menu-btn{
  display:none;
  position:relative;
  width:40px;height:40px;
  border-radius:10px;
  border:1px solid var(--c-line);
  background:var(--c-surface);
}
.menu-btn span{
  position:absolute;left:11px;right:11px;top:50%;
  height:2px;margin-top:-1px;background:var(--c-ink);
  transition:background var(--dur) var(--ease);
}
.menu-btn span::before,.menu-btn span::after{
  content:'';position:absolute;left:0;right:0;height:2px;background:var(--c-ink);
  transition:transform var(--dur) var(--ease),top var(--dur) var(--ease);
}
.menu-btn span::before{top:-7px}
.menu-btn span::after{top:7px}
.menu-btn.is-open span{background:transparent}
.menu-btn.is-open span::before{top:0;transform:rotate(45deg)}
.menu-btn.is-open span::after{top:0;transform:rotate(-45deg)}

@media (max-width:1023px){
  .nav-links{
    position:fixed;
    inset:68px 0 0 0;
    background:var(--c-ink);
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:14px 0 110px;
    overflow-y:auto;
    opacity:0;
    transform:translateY(-8px);
    pointer-events:none;
    transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease);
  }
  .nav-links.is-open{opacity:1;transform:none;pointer-events:auto}
  .nav-link{
    display:flex;align-items:center;
    height:52px;padding:0 24px;
    font-size:16px;color:rgba(255,255,255,.82);
  }
  .nav-link::after{display:none}
  .nav-link:hover{color:#fff}
  .nav-link.is-active{color:var(--c-accent)}
  .menu-btn{display:block}
  .nav-badge{display:none}
  .nav-links::after{
    content:'客服窗口每日 09:00 – 22:00';
    display:block;
    margin:16px 24px 0;
    padding-top:18px;
    border-top:1px solid rgba(255,255,255,.14);
    font-size:13px;
    color:rgba(255,255,255,.5);
  }
}

/* ============ 分类页 Hero ============ */
.page-hero{position:relative;background:var(--c-ink);color:#fff;overflow:hidden}
.hero-media{position:absolute;inset:0;z-index:0}
.hero-media img{width:100%;height:100%;object-fit:cover;opacity:.26}
.hero-media::after{
  content:'';
  position:absolute;inset:0;
  background:linear-gradient(160deg,rgba(15,21,18,.80) 0%,rgba(15,21,18,.90) 52%,rgba(15,21,18,.97) 100%);
}
.page-hero::before{
  content:'';
  position:absolute;inset:0;z-index:1;
  background-image:repeating-linear-gradient(180deg,rgba(255,255,255,.055) 0 1px,transparent 1px 78px);
  pointer-events:none;
}
.page-hero-inner{position:relative;z-index:2;padding:44px 0 64px}
@media (min-width:1024px){.page-hero-inner{padding:64px 0 88px}}

.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.6);margin-bottom:22px}
.crumb a{color:rgba(255,255,255,.72);transition:color var(--dur) var(--ease)}
.crumb a:hover{color:var(--c-accent)}
.crumb-cur{color:rgba(255,255,255,.9)}

.page-hero-grid{display:grid;gap:34px;grid-template-columns:1fr}
@media (min-width:1024px){
  .page-hero-grid{grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:52px;align-items:center}
}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:700;letter-spacing:.14em;
  color:var(--c-accent);
  background:rgba(201,242,77,.12);
  border:1px solid rgba(201,242,77,.32);
  padding:5px 13px;border-radius:999px;
}
.page-hero h1{
  margin-top:18px;
  font-size:32px;
  line-height:1.26;
  font-weight:800;
  letter-spacing:-.02em;
  color:#fff;
}
@media (min-width:1024px){
  .page-hero h1{font-size:52px;line-height:1.16}
}
.hero-lead{
  margin-top:18px;
  max-width:660px;
  font-size:16px;
  line-height:1.85;
  color:rgba(255,255,255,.78);
}
@media (min-width:1024px){.hero-lead{font-size:17px}}

.status-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.status-pill{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;
  color:rgba(255,255,255,.86);
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.14);
  padding:7px 14px;border-radius:999px;
}
.dot{width:7px;height:7px;border-radius:50%;background:var(--c-ok);box-shadow:0 0 0 3px rgba(31,169,113,.2);flex:0 0 auto}

.hero-card{
  background:#141A17;
  border:1px solid rgba(255,255,255,.12);
  border-radius:var(--r-card);
  padding:22px;
}
.hero-card-title{font-size:15px;font-weight:700;color:#fff;display:flex;align-items:center;gap:9px}
.hero-card-title::before{content:'';width:3px;height:14px;background:var(--c-accent);border-radius:2px}
.hero-steps{display:grid;gap:13px;margin-top:16px}
.hero-steps li{display:grid;grid-template-columns:26px 1fr;gap:12px;align-items:start;font-size:14px;line-height:1.7;color:rgba(255,255,255,.76)}
.step-num{
  font-family:var(--font-mono);
  font-size:12px;font-weight:800;
  color:var(--c-accent);
  border:1px solid rgba(201,242,77,.4);
  border-radius:8px;
  display:flex;align-items:center;justify-content:center;
  height:26px;
}

/* ============ 自查步骤 ============ */
.step-list{display:grid;max-width:880px}
.step-row{
  display:grid;
  grid-template-columns:46px 1fr;
  gap:18px;
  padding:22px 18px;
  border-top:1px dashed var(--c-line);
  transition:background var(--dur) var(--ease);
  border-radius:10px;
}
.step-row:first-child{border-top:0}
.step-row:hover{background:rgba(201,242,77,.07)}
.step-no{
  font-family:var(--font-mono);
  font-size:20px;font-weight:800;
  color:var(--c-accent-press);
  line-height:1.4;
}
.step-body h3{font-size:17px;font-weight:600;margin-bottom:6px}
.step-body p{font-size:15px;color:var(--c-muted);line-height:1.8}
@media (max-width:520px){
  .step-row{grid-template-columns:1fr;gap:6px;padding:20px 4px}
}

/* ============ 主内容布局 ============ */
.layout{display:grid;gap:32px;grid-template-columns:1fr}
@media (min-width:1024px){
  .layout{grid-template-columns:minmax(0,1fr) 320px;gap:44px;align-items:start}
}
.side{display:grid;gap:20px;align-content:start}
@media (min-width:1024px){.side{position:sticky;top:88px}}

/* ============ 手风琴 ============ */
.faq-group{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  box-shadow:0 1px 2px rgba(15,21,18,.04);
  overflow:hidden;
  margin-bottom:18px;
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.faq-group:hover{border-color:rgba(201,242,77,.7);box-shadow:0 12px 32px rgba(15,21,18,.08)}
.faq-group-head{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;
  padding:18px 20px;
  text-align:left;
  transition:background var(--dur) var(--ease);
}
.faq-group-head:hover{background:rgba(201,242,77,.09)}
.group-head-left{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.gtitle{font-size:17px;font-weight:700;color:var(--c-ink)}
.gcount{
  font-family:var(--font-mono);
  font-size:12px;font-weight:700;
  color:var(--c-muted);
  background:var(--c-bg);
  border:1px solid var(--c-line);
  border-radius:999px;
  padding:2px 9px;
}
.gicon{
  position:relative;
  width:24px;height:24px;flex:0 0 auto;
  border-radius:999px;
  border:1px solid var(--c-line);
  background:var(--c-surface);
}
.gicon::before,.gicon::after{
  content:'';position:absolute;left:50%;top:50%;
  background:var(--c-ink);border-radius:2px;
  transform:translate(-50%,-50%);
  transition:opacity var(--dur) var(--ease);
}
.gicon::before{width:11px;height:2px}
.gicon::after{width:2px;height:11px}
.faq-group.is-open .gicon::after{opacity:0}
.faq-group-body{display:none;padding:0 20px 10px}
.faq-group.is-open .faq-group-body{display:block;animation:fade-up .26s var(--ease)}

.faq-item{border-top:1px solid var(--c-line)}
.faq-item:first-child{border-top:0}
.faq-q{
  width:100%;
  display:flex;align-items:flex-start;justify-content:space-between;
  gap:16px;
  padding:16px 0;
  text-align:left;
  font-size:16px;font-weight:600;
  color:var(--c-ink);
  transition:color var(--dur) var(--ease);
}
.qtext{position:relative;display:inline-block}
.qtext::after{
  content:'';
  position:absolute;left:0;bottom:-3px;
  width:100%;height:2px;
  background:var(--c-accent);
  transform:scaleX(0);transform-origin:left;
  transition:transform var(--dur) var(--ease);
}
.faq-q:hover .qtext::after{transform:scaleX(1)}
.q-mark{
  position:relative;
  width:20px;height:20px;flex:0 0 auto;
  margin-top:4px;
  color:var(--c-ink);
}
.q-mark::before,.q-mark::after{
  content:'';position:absolute;left:50%;top:50%;
  background:currentColor;border-radius:2px;
  transform:translate(-50%,-50%);
  transition:transform 220ms var(--ease),opacity 220ms var(--ease);
}
.q-mark::before{width:12px;height:2px}
.q-mark::after{width:2px;height:12px}
.faq-item.is-open .q-mark::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq-item.is-open .faq-q{color:var(--c-ink)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 260ms var(--ease)}
.faq-a-inner{padding:0 0 20px;font-size:15px;line-height:1.85;color:var(--c-muted)}
.faq-a-inner p{margin-bottom:10px}
.faq-a-inner ul{display:grid;gap:9px;margin-top:2px}
.faq-a-inner li{position:relative;padding-left:17px}
.faq-a-inner li::before{
  content:'';position:absolute;left:0;top:11px;
  width:6px;height:6px;border-radius:2px;
  background:var(--c-accent);
}
.faq-a-inner p:last-child{margin-bottom:0}

/* ============ 侧栏 ============ */
.side-card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  padding:20px;
  box-shadow:0 1px 2px rgba(15,21,18,.04);
  transition:box-shadow var(--dur) var(--ease);
}
.side-card:hover{box-shadow:0 12px 32px rgba(15,21,18,.08)}
.side-title{
  display:flex;align-items:center;gap:9px;
  font-size:14px;font-weight:700;color:var(--c-ink);
  margin-bottom:12px;
}
.side-title::before{content:'';width:3px;height:14px;background:var(--c-accent);border-radius:2px}
.side-link{
  display:flex;align-items:center;justify-content:space-between;
  gap:12px;
  padding:12px 0;
  border-top:1px dashed var(--c-line);
  font-size:14px;font-weight:500;
  color:var(--c-text);
  transition:color var(--dur) var(--ease),padding-left var(--dur) var(--ease);
}
.side-link:first-of-type{border-top:0;padding-top:4px}
.side-link:hover{color:var(--c-ink);padding-left:6px}
.side-link .arw{font-family:var(--font-mono);color:var(--c-faint);transition:color var(--dur) var(--ease)}
.side-link:hover .arw{color:var(--c-accent-press)}
.side-card-media img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
  border-radius:var(--r-img);
}
.side-img-cap{font-size:13px;line-height:1.75;color:var(--c-muted);margin-top:12px}

.side-cta{
  position:relative;
  overflow:hidden;
  background:var(--c-ink);
  color:#fff;
  border-radius:var(--r-card);
  padding:20px;
}
.side-cta::before{
  content:'';position:absolute;inset:0;
  background-image:repeating-linear-gradient(180deg,rgba(255,255,255,.05) 0 1px,transparent 1px 34px);
  pointer-events:none;
}
.side-cta > *{position:relative}
.side-cta-title{font-size:16px;font-weight:700;color:#fff;margin-bottom:8px}
.side-cta p{font-size:13px;line-height:1.8;color:rgba(255,255,255,.72);margin-bottom:16px}

/* ============ 准备清单 ============ */
.prep-list{display:grid;gap:14px;max-width:840px}
.prep-list li{
  display:flex;align-items:flex-start;gap:13px;
  background:var(--c-bg);
  border:1px solid var(--c-line);
  border-radius:12px;
  padding:15px 17px;
  font-size:15px;
  line-height:1.75;
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.prep-list li:hover{
  border-color:rgba(201,242,77,.7);
  box-shadow:0 10px 26px rgba(15,21,18,.07);
  transform:translateY(-2px);
}
.prep-list li::before{
  content:'';flex:0 0 auto;
  width:8px;height:8px;margin-top:9px;
  border-radius:2px;
  background:var(--c-accent);
  box-shadow:0 0 0 3px rgba(201,242,77,.22);
}
.prep-list strong{font-weight:700;color:var(--c-ink)}
.prep-note{
  margin-top:22px;
  display:flex;align-items:flex-start;gap:10px;
  font-size:14px;line-height:1.8;
  color:var(--c-muted);
  max-width:840px;
}
.prep-note::before{
  content:'';flex:0 0 auto;
  width:8px;height:8px;margin-top:9px;border-radius:999px;
  background:var(--c-flame);
}

.more-links{
  display:flex;flex-wrap:wrap;align-items:center;
  gap:14px 28px;
  border-top:1px solid var(--c-line);
  padding-top:28px;
  margin-top:44px;
}
.more-label{font-size:13px;letter-spacing:.1em;color:var(--c-faint)}
.more-links a{
  position:relative;
  font-size:14px;font-weight:600;
  color:var(--c-ink);
  padding-bottom:3px;
}
.more-links a::after{
  content:'';position:absolute;left:0;bottom:0;
  width:100%;height:2px;background:var(--c-accent);
  transform:scaleX(0);transform-origin:left;
  transition:transform var(--dur) var(--ease);
}
.more-links a:hover::after{transform:scaleX(1)}

/* ============ 底部 CTA ============ */
.cta-band{position:relative;background:var(--c-ink);color:#fff;overflow:hidden}
.cta-band::before{
  content:'';position:absolute;inset:0;
  background-image:repeating-linear-gradient(180deg,rgba(255,255,255,.05) 0 1px,transparent 1px 58px);
  pointer-events:none;
}
.cta-inner{
  position:relative;
  display:grid;gap:26px;
  padding:60px 0;
  align-items:center;
}
@media (min-width:1024px){
  .cta-inner{grid-template-columns:minmax(0,1fr) auto;gap:44px;padding:82px 0}
}
.cta-inner h2{color:#fff;font-size:26px;line-height:1.34;font-weight:800;letter-spacing:-.01em;margin-bottom:12px}
@media (min-width:1024px){.cta-inner h2{font-size:36px}}
.cta-inner p{font-size:15px;line-height:1.85;color:rgba(255,255,255,.75);max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ============ 页脚 ============ */
.site-footer{background:var(--c-ink);color:rgba(255,255,255,.72);padding-top:60px}
.footer-grid{display:grid;gap:32px;grid-template-columns:1fr}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.55fr 1fr 1fr 1.2fr;gap:44px}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.site-footer .brand-mark{background:var(--c-accent);color:var(--c-ink)}
.site-footer .brand-text{color:#fff}
.footer-desc{font-size:14px;line-height:1.85;color:rgba(255,255,255,.62);max-width:330px}
.footer-title{color:rgba(255,255,255,.95);font-size:14px;font-weight:700;margin-bottom:14px}
.footer-links{display:grid;gap:10px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.68);transition:color var(--dur) var(--ease)}
.footer-links a:hover{color:var(--c-accent)}
.footer-meta{font-size:14px;line-height:2;color:rgba(255,255,255,.68)}
.footer-meta a{color:var(--c-accent)}
.footer-meta a:hover{text-decoration:underline}
.footer-bottom{
  margin-top:46px;
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0;
  display:flex;flex-wrap:wrap;gap:10px 24px;
  justify-content:space-between;
  font-size:13px;
  color:rgba(255,255,255,.5);
}

/* ============ 动效 ============ */
@keyframes fade-up{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
@keyframes ticker{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@keyframes flip-num{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
@keyframes underline-sweep{from{transform:scaleX(0)}to{transform:scaleX(1)}}

.has-js .reveal{opacity:0;transform:translateY(12px);transition:opacity .55s var(--ease),transform .55s var(--ease)}
.has-js .reveal.is-in{opacity:1;transform:none}

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