/* roulang page: index */
:root{
  --brand-900:#0F302A;
  --brand-700:#1B4D3E;
  --brand-500:#2E6B57;
  --brand-100:#DCE9E3;
  --accent-600:#C9631F;
  --accent-500:#E07A3F;
  --accent-100:#F8E6D8;
  --bg:#F6F3ED;
  --surface:#FFFFFF;
  --surface-2:#EFEAE1;
  --ink-900:#141A18;
  --ink:#1C211F;
  --ink-2:#4B5651;
  --ink-3:#7C8781;
  --line:#E4DED4;
  --success:#2F7D5B;
  --warn:#C98A1F;
  --error:#B8433A;
  --sh-1:0 1px 2px rgba(15,48,42,.06);
  --sh-2:0 10px 30px -12px rgba(15,48,42,.18);
  --sh-3:0 18px 44px -16px rgba(15,48,42,.26);
  --r-card:18px;
  --r-img:14px;
  --r-big:20px;
  --r-pill:999px;
  --r-sm:12px;
  --t:450ms cubic-bezier(.2,.7,.2,1);
  --t-fast:240ms cubic-bezier(.2,.7,.2,1);
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --serif:"Songti SC","Noto Serif SC",Georgia,serif;
  --sp-1:8px;--sp-2:12px;--sp-3:16px;--sp-4:24px;--sp-5:32px;--sp-6:48px;--sp-7:64px;--sp-8:96px;--sp-9:120px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:17px;
  line-height:1.9;
  color:var(--ink);
  background:var(--bg);
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border-style:none}
a{color:var(--brand-700);text-decoration:none;transition:color var(--t-fast)}
a:hover{color:var(--accent-600)}
button,input{font-family:inherit;font-size:inherit}
h1,h2,h3,h4{margin:0;line-height:1.3;color:var(--ink);font-weight:700;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:3px solid var(--brand-500);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.container-wide{max-width:1360px}
.section{padding:96px 0}
.section-tight{padding:72px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.section-head h2{font-size:32px}
.section-head .section-sub{color:var(--ink-2);font-size:16px;margin-top:10px;max-width:620px}
.eyebrow{display:inline-flex;align-items:center;gap:12px;font-size:14px;font-weight:600;color:var(--accent-600);letter-spacing:.06em}
.eyebrow::before{content:"";width:24px;height:2px;background:var(--accent-500);display:inline-block;border-radius:2px}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand-700);border-bottom:2px solid var(--brand-100);padding-bottom:2px;transition:border-color var(--t-fast),color var(--t-fast)}
.link-more:hover{border-color:var(--accent-500);color:var(--accent-600)}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-pill);border:1.5px solid transparent;
  font-size:16px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:background-color var(--t-fast),color var(--t-fast),transform var(--t),box-shadow var(--t),border-color var(--t-fast);
}
.btn-primary{background:var(--accent-500);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--accent-600);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-3)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border-color:var(--brand-700);color:var(--brand-700);border-radius:var(--r-sm);height:46px}
.btn-ghost:hover{background:rgba(220,233,227,.55);color:var(--brand-900)}
.btn-sm{height:42px;padding:0 20px;font-size:15px}
.btn-lg{height:52px;padding:0 30px;font-size:17px}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}
.btn-block{width:100%}

/* badges & tags */
.badge{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);background:var(--brand-100);color:var(--brand-700);font-size:13px;font-weight:600;line-height:1}
.badge-accent{background:var(--accent-100);color:var(--accent-600)}
.tag{display:inline-flex;align-items:center;height:34px;padding:0 16px;border-radius:var(--r-pill);border:1px solid var(--line);background:var(--surface);color:var(--ink-2);font-size:14px;font-weight:500;transition:var(--t-fast)}
.tag:hover{border-color:var(--brand-500);color:var(--brand-700);background:var(--brand-100)}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,243,237,.86);
  border-bottom:1px solid transparent;
  transition:background-color var(--t),border-color var(--t),box-shadow var(--t),backdrop-filter var(--t);
}
.site-header.is-stuck{background:rgba(255,255,255,.96);backdrop-filter:blur(12px);border-bottom-color:var(--line);box-shadow:var(--sh-1)}
.nav-wrap{display:flex;align-items:center;gap:24px;height:76px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand__mark{width:36px;height:36px;border-radius:50%;border:2.5px solid var(--brand-700);position:relative;flex-shrink:0}
.brand__mark::after{content:"";position:absolute;inset:9px;border-radius:50%;background:var(--accent-500)}
.brand__text{display:flex;flex-direction:column;line-height:1.15}
.brand__main{font-size:18px;font-weight:800;color:var(--brand-900);letter-spacing:.01em}
.brand__sub{font-size:12px;color:var(--ink-3);letter-spacing:.04em}
.nav-links{display:flex;align-items:center;gap:32px;margin-left:auto}
.nav-link{position:relative;font-size:17px;color:var(--ink-2);padding:6px 0}
.nav-link::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--accent-500);transition:width var(--t-fast)}
.nav-link:hover{color:var(--brand-700)}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--brand-700);font-weight:600}
.nav-link.is-active::after{width:100%}
.nav-actions{display:flex;align-items:center;gap:20px;margin-left:8px}
.nav-help{font-size:16px;color:var(--ink-2);border-bottom:2px solid transparent;transition:border-color var(--t-fast),color var(--t-fast)}
.nav-help:hover{color:var(--brand-700);border-color:var(--accent-500)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:50%;border:1px solid var(--line);
  background:var(--surface);cursor:pointer;align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--brand-900);border-radius:2px;transition:var(--t-fast)}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:88%;max-width:380px;z-index:80;
  background:var(--surface);box-shadow:var(--sh-3);
  transform:translateX(102%);transition:transform var(--t);
  display:flex;flex-direction:column;padding:24px;
}
.drawer.is-open{transform:translateX(0)}
.drawer__top{display:flex;align-items:center;justify-content:space-between;margin-bottom:32px}
.drawer__close{width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:var(--surface-2);font-size:20px;cursor:pointer;color:var(--ink-2)}
.drawer__nav{display:flex;flex-direction:column;gap:4px}
.drawer__nav a{padding:14px 4px;font-size:17px;color:var(--ink);border-bottom:1px solid var(--line)}
.drawer__nav a.is-active{color:var(--brand-700);font-weight:600}
.drawer__foot{margin-top:auto;padding-top:24px}
.scrim{position:fixed;inset:0;background:rgba(20,26,24,.45);opacity:0;pointer-events:none;transition:opacity var(--t);z-index:70}
.scrim.is-open{opacity:1;pointer-events:auto}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:88px 0 96px}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(circle at 82% 18%,rgba(27,77,62,.05) 0 34%,transparent 34.4%),
                   radial-gradient(circle at 82% 18%,rgba(27,77,62,.04) 0 52%,transparent 52.4%),
                   linear-gradient(rgba(27,77,62,.035) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(27,77,62,.035) 1px,transparent 1px);
  background-size:auto,auto,48px 48px,48px 48px;
  pointer-events:none;
}
.hero__grid{position:relative;display:grid;grid-template-columns:6fr 6fr;gap:64px;align-items:center}
.hero h1{font-size:44px;margin:20px 0 20px;letter-spacing:-.02em}
.hero__lead{font-size:18px;color:var(--ink-2);max-width:520px}
.hero__cta{display:flex;gap:16px;margin:32px 0 24px;flex-wrap:wrap}
.hero__trust{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:14px;color:var(--ink-2)}
.hero__trust i{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--brand-500);margin-right:6px;vertical-align:middle}
.hero__trust .dot{color:var(--ink-3);margin:0 4px}
.hero__figure{position:relative}
.hero__figure::after{
  content:"";position:absolute;right:-12px;bottom:-12px;width:56%;height:56%;
  border-radius:var(--r-big);background:var(--brand-100);z-index:0;
}
.hero__figure img{
  position:relative;z-index:1;width:100%;aspect-ratio:5/4;object-fit:cover;
  border-radius:var(--r-big);border:1px solid var(--brand-100);background:var(--brand-100);
}

/* ---------- 品牌主张 5/7 ---------- */
.claim{display:grid;grid-template-columns:5fr 7fr;gap:64px}
.claim__left h2{font-size:32px;margin:18px 0 16px}
.claim__left p{color:var(--ink-2);max-width:520px}
.claim__left .claim__inner{position:sticky;top:110px}
.claim__list{display:flex;flex-direction:column}
.claim__item{
  display:grid;grid-template-columns:64px 1fr 24px;gap:20px;align-items:start;
  padding:26px 16px 26px 12px;border-bottom:1px solid var(--line);border-radius:var(--r-sm);
  transition:background-color var(--t-fast),transform var(--t-fast);
}
.claim__item:first-child{border-top:1px solid var(--line)}
.claim__item:hover{background:var(--surface);transform:translateX(4px)}
.claim__num{font-size:28px;font-weight:800;color:var(--accent-500);line-height:1.2;font-variant-numeric:tabular-nums}
.claim__item h3{font-size:20px;margin-bottom:6px}
.claim__item p{font-size:16px;color:var(--ink-2);line-height:1.8}
.claim__arrow{color:var(--ink-3);font-size:18px;line-height:1.6;transition:color var(--t-fast),transform var(--t-fast)}
.claim__item:hover .claim__arrow{color:var(--accent-500);transform:translateX(4px)}

/* ---------- 故事 ---------- */
.story__block{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;padding:56px 0}
.story__block + .story__block{border-top:1px solid var(--line)}
.story__block h2{font-size:32px;margin:16px 0 18px}
.story__block p{color:var(--ink-2)}
.story__block p + p{margin-top:1.2em}
.story__img{border-radius:var(--r-card);overflow:hidden;background:var(--brand-100);border:1px solid var(--line);box-shadow:var(--sh-1)}
.story__img img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform var(--t)}
.story__img:hover img{transform:scale(1.02)}
.story__block.is-reverse .story__text{order:2}
.story__block.is-reverse .story__img{order:1}
.story__meta{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}

/* ---------- bento ---------- */
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.bento__item{
  position:relative;display:flex;flex-direction:column;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);transition:transform var(--t),box-shadow var(--t);
}
.bento__item:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.bento__item--wide{grid-column:span 8}
.bento__item--tall{grid-column:span 4}
.bento__media{overflow:hidden;background:var(--brand-100)}
.bento__media img{width:100%;height:100%;object-fit:cover;transition:transform var(--t)}
.bento__item--wide .bento__media img{aspect-ratio:16/9}
.bento__item--tall .bento__media img{aspect-ratio:4/3}
.bento__item:hover .bento__media img{transform:scale(1.03)}
.bento__body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1}
.bento__body h3{font-size:19px}
.bento__body p{font-size:15px;color:var(--ink-2);line-height:1.8}
.bento__foot{margin-top:auto;padding-top:8px;display:flex;align-items:center;justify-content:space-between}
.bento__foot .read{font-size:15px;font-weight:600;color:var(--brand-700)}
.bento__item:hover .read{color:var(--accent-600)}

/* ---------- news / cms ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform var(--t),box-shadow var(--t);
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.news-card__media{background:var(--brand-100);overflow:hidden;position:relative}
.news-card__media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform var(--t)}
.news-card:hover .news-card__media img{transform:scale(1.03)}
.news-card__fallback{
  width:100%;aspect-ratio:16/9;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--brand-100),#cfe0d8);color:var(--brand-700);
  font-size:40px;font-weight:800;font-family:var(--serif);
}
.news-card__body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.news-card__title{font-size:19px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card__desc{font-size:15px;color:var(--ink-2);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card__meta{margin-top:auto;padding-top:14px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;font-size:14px;color:var(--ink-3)}
.news-card__meta .cat{color:var(--brand-700);font-weight:600}
.news-empty{
  grid-column:1/-1;min-height:240px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:16px;text-align:center;background:var(--surface);border:1px dashed var(--line);border-radius:var(--r-card);padding:40px;
}
.news-empty__icon{width:56px;height:56px;border-radius:50%;background:var(--surface-2);display:flex;align-items:center;justify-content:center;font-size:24px;color:var(--ink-3)}
.news-empty p{color:var(--ink-2)}

/* ---------- 数据条 / 信任 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:var(--r-card);background:var(--surface);overflow:hidden;box-shadow:var(--sh-1)}
.stat{padding:32px 24px;text-align:center}
.stat + .stat{border-left:1px solid var(--line)}
.stat b{display:block;font-size:38px;color:var(--brand-700);font-weight:800;line-height:1.2;font-variant-numeric:tabular-nums}
.stat span{font-size:14px;color:var(--ink-2)}
.logo-wall{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin-top:32px}
.logo-wall span{
  display:flex;align-items:center;justify-content:center;height:72px;border:1px solid var(--line);
  border-radius:var(--r-sm);background:var(--surface);color:var(--ink-3);font-size:15px;font-weight:600;
  filter:grayscale(1);opacity:.6;transition:var(--t);
}
.logo-wall span:hover{filter:grayscale(0);opacity:1;color:var(--brand-700);border-color:var(--brand-100);background:var(--brand-100)}
.quotes{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:32px}
.quote{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:28px;box-shadow:var(--sh-1)}
.quote p{font-family:var(--serif);font-size:17px;line-height:1.9;color:var(--ink)}
.quote p::before{content:"「";color:var(--accent-500);font-weight:700}
.quote p::after{content:"」";color:var(--accent-500);font-weight:700}
.quote footer{margin-top:16px;font-size:14px;color:var(--ink-3)}

/* ---------- faq ---------- */
.faq-wrap{max-width:760px;margin:0 auto}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:14px;margin-bottom:12px;overflow:hidden;transition:box-shadow var(--t),border-color var(--t)}
.faq-item:hover{box-shadow:var(--sh-1)}
.faq-item.is-open{border-color:var(--brand-100);box-shadow:var(--sh-1)}
.faq-item.is-open{border-left:3px solid var(--accent-500)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;background:none;border:0;text-align:left;font-size:17px;font-weight:600;
  color:var(--ink);cursor:pointer;
}
.faq-icon{flex-shrink:0;width:26px;height:26px;border-radius:50%;background:var(--brand-100);color:var(--brand-700);display:flex;align-items:center;justify-content:center;font-size:18px;line-height:1;transition:transform var(--t-fast),background-color var(--t-fast)}
.faq-item.is-open .faq-icon{transform:rotate(45deg);background:var(--accent-100);color:var(--accent-600)}
.faq-a{max-height:0;overflow:hidden;transition:max-height var(--t)}
.faq-a__inner{padding:0 22px 22px;color:var(--ink-2);font-size:17px;line-height:1.9}

/* ---------- cta ---------- */
.cta-band{
  position:relative;overflow:hidden;background:var(--brand-900);color:#fff;
  border-radius:var(--r-big);padding:56px;display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:56px 56px;pointer-events:none;
}
.cta-band > *{position:relative}
.cta-band h2{color:#fff;font-size:32px}
.cta-band p{color:rgba(255,255,255,.8);font-size:16px;margin-top:14px;max-width:460px}
.cta-form{display:flex;gap:12px;flex-wrap:wrap}
.cta-form input{
  flex:1 1 220px;height:48px;padding:0 16px;border-radius:var(--r-sm);
  border:1px solid rgba(255,255,255,.28);background:rgba(255,255,255,.08);color:#fff;
  transition:background-color var(--t-fast),color var(--t-fast),border-color var(--t-fast);
}
.cta-form input::placeholder{color:rgba(255,255,255,.6)}
.cta-form input:focus{background:#fff;color:var(--ink);border-color:#fff;outline:3px solid rgba(224,122,63,.6);outline-offset:2px}
.cta-form input:focus::placeholder{color:var(--ink-3)}
.form-msg{margin-top:14px;font-size:14px;min-height:20px}
.form-msg.is-ok{color:#8FE0BC}
.form-msg.is-err{color:#F3A79B}
.form-note{margin-top:10px;font-size:12px;color:rgba(255,255,255,.6)}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-900);color:#fff;margin-top:0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;padding:72px 0 48px}
.footer-brand .brand__main{color:#fff}
.footer-brand .brand__sub{color:rgba(255,255,255,.6)}
.footer-brand .brand__mark{border-color:rgba(255,255,255,.8)}
.footer-brand p{color:rgba(255,255,255,.72);font-size:14px;margin-top:16px;max-width:320px;line-height:1.8}
.socials{display:flex;gap:10px;margin-top:20px}
.socials a{width:38px;height:38px;border-radius:50%;border:1px solid rgba(255,255,255,.18);display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.75);font-size:13px;transition:var(--t-fast)}
.socials a:hover{background:var(--accent-500);border-color:var(--accent-500);color:#fff}
.footer-col h3{color:#fff;font-size:15px;margin-bottom:16px}
.footer-col a{display:block;color:rgba(255,255,255,.72);font-size:14px;padding:7px 0;border-left:2px solid transparent;padding-left:0;transition:var(--t-fast)}
.footer-col a:hover{color:#fff;padding-left:10px;border-left-color:var(--accent-500)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:24px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:14px;color:rgba(255,255,255,.6)}
.footer-bottom a{color:rgba(255,255,255,.6)}
.footer-bottom a:hover{color:#fff}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity 600ms ease,transform 600ms cubic-bezier(.2,.7,.2,1)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .hero__grid{gap:48px}
  .hero h1{font-size:40px}
}
@media (max-width:1023px){
  .section{padding:72px 0}
  .section-tight{padding:56px 0}
  .nav-links,.nav-help{display:none}
  .nav-toggle{display:flex}
  .nav-wrap{height:64px}
  .hero{padding:64px 0 72px}
  .hero__grid{grid-template-columns:1fr;gap:40px}
  .hero h1{font-size:34px}
  .claim{grid-template-columns:1fr;gap:32px}
  .claim__left .claim__inner{position:static}
  .story__block{grid-template-columns:1fr;gap:32px;padding:40px 0}
  .story__block.is-reverse .story__text{order:1}
  .story__block.is-reverse .story__img{order:2}
  .bento{grid-template-columns:repeat(2,1fr)}
  .bento__item--wide,.bento__item--tall{grid-column:span 2}
  .bento__item--tall .bento__media img{aspect-ratio:16/9}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .cta-band{grid-template-columns:1fr;padding:40px;gap:28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;padding:56px 0 36px}
  .logo-wall{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 16px}
  .hero h1{font-size:30px}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
  .section-head h2,.claim__left h2,.story__block h2,.cta-band h2{font-size:24px}
  .hero__cta{flex-direction:column;align-items:stretch}
  .hero__cta .btn{width:100%}
  .hero__figure::after{right:-8px;bottom:-8px}
  .bento{grid-template-columns:1fr}
  .bento__item--wide,.bento__item--tall{grid-column:span 1}
  .news-grid{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stat + .stat{border-left:0}
  .stat:nth-child(2n){border-left:1px solid var(--line)}
  .stat:nth-child(n+3){border-top:1px solid var(--line)}
  .quotes{grid-template-columns:1fr}
  .logo-wall{grid-template-columns:repeat(2,1fr)}
  .cta-band{padding:32px 24px;border-radius:var(--r-card)}
  .cta-form{flex-direction:column}
  .cta-form .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;padding:48px 0 24px}
  .footer-bottom{flex-direction:column}
  .claim__item{grid-template-columns:48px 1fr;gap:14px}
  .claim__arrow{display:none}
}
@media (max-width:479px){
  .hero{padding:48px 0 56px}
  .hero h1{font-size:28px}
  .hero__trust{font-size:13px}
  .stats{grid-template-columns:1fr}
  .stat:nth-child(2n){border-left:0}
  .stat + .stat{border-left:0;border-top:1px solid var(--line)}
  .brand__main{font-size:17px}
}

/* roulang page: article */
:root{
  --brand-900:#0F302A;
  --brand-700:#1B4D3E;
  --brand-500:#2E6B57;
  --brand-100:#DCE9E3;
  --accent-600:#C9631F;
  --accent-500:#E07A3F;
  --accent-100:#F8E6D8;
  --bg:#F6F3ED;
  --surface:#FFFFFF;
  --surface-2:#EFEAE1;
  --ink-900:#141A18;
  --ink:#1C211F;
  --ink-2:#4B5651;
  --ink-3:#7C8781;
  --line:#E4DED4;
  --success:#2F7D5B;
  --warn:#C98A1F;
  --error:#B8433A;
  --sh-1:0 1px 2px rgba(15,48,42,.06);
  --sh-2:0 10px 30px -12px rgba(15,48,42,.18);
  --sh-3:0 18px 44px -16px rgba(15,48,42,.26);
  --r-card:18px;
  --r-img:14px;
  --r-big:20px;
  --r-sm:12px;
  --r-pill:999px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --t:450ms var(--ease);
  --t-fast:240ms var(--ease);
  --sp-1:8px; --sp-2:12px; --sp-3:16px; --sp-4:24px; --sp-5:32px; --sp-6:48px; --sp-7:64px; --sp-8:96px;
  --font-sans:'PingFang SC','HarmonyOS Sans SC','Microsoft YaHei','Noto Sans SC',system-ui,-apple-system,sans-serif;
  --font-serif:'Songti SC','Noto Serif SC',Georgia,serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg{max-width:100%;display:block}
a{color:inherit}
button{font-family:inherit}
h1,h2,h3,h4,p,figure,blockquote{margin:0}
ul,ol{margin:0}
:focus-visible{outline:3px solid var(--brand-500);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 var(--sp-4)}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--brand-700);color:#fff;padding:10px 18px;border-radius:0 0 12px 0;z-index:200}
.skip-link:focus{left:0}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:16px;font-weight:600;line-height:1;cursor:pointer;text-decoration:none;
  border:0;border-radius:var(--r-pill);
  transition:transform var(--t),background-color var(--t),box-shadow var(--t),color var(--t),border-color var(--t);
}
.btn-primary{background:var(--accent-500);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--accent-600);transform:translateY(-2px);box-shadow:var(--sh-3)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn-ghost{background:transparent;color:var(--brand-700);border:1.5px solid var(--brand-700)}
.btn-ghost:hover{background:var(--brand-100);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-text{background:none;border:0;padding:0;color:var(--brand-700);font-weight:600;font-size:15px;cursor:pointer;text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px;text-decoration-color:var(--brand-500)}
.btn-text:hover{text-decoration-color:var(--accent-500);color:var(--accent-600)}
.btn-sm{height:46px;padding:0 var(--sp-4);font-size:16px}
.btn-lg{height:54px;padding:0 var(--sp-5);font-size:17px}
.btn-block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;pointer-events:none}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;height:28px;padding:0 14px;
  border-radius:var(--r-pill);background:var(--brand-100);color:var(--brand-700);
  font-size:13px;font-weight:600;letter-spacing:.02em;line-height:1;white-space:nowrap;
}
.badge-accent{background:var(--accent-100);color:var(--accent-600)}
.tag{
  display:inline-flex;align-items:center;height:34px;padding:0 16px;
  border-radius:var(--r-pill);border:1px solid var(--line);background:var(--surface);
  color:var(--ink-2);font-size:14px;text-decoration:none;transition:var(--t-fast);
}
.tag:hover{border-color:var(--brand-500);color:var(--brand-700);background:var(--brand-100)}
.eyebrow{
  display:inline-flex;align-items:center;gap:12px;font-size:14px;font-weight:600;
  letter-spacing:.12em;color:var(--accent-600);
}
.eyebrow::before{content:"";width:24px;height:2px;background:var(--accent-500);border-radius:2px}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(246,243,237,.86);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:background-color var(--t),box-shadow var(--t),border-color var(--t);
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.96);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-bottom-color:var(--line);
  box-shadow:var(--sh-1);
}
.header-inner{display:flex;align-items:center;gap:var(--sp-5);height:76px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;flex-shrink:0}
.brand-mark{
  width:36px;height:36px;border-radius:50%;
  border:2px solid var(--brand-700);position:relative;display:grid;place-items:center;flex-shrink:0;
}
.brand-mark::after{content:"";position:absolute;inset:4px;border-radius:50%;border:1px dashed rgba(27,77,62,.35)}
.brand-mark-dot{width:12px;height:12px;border-radius:50%;background:var(--accent-500)}
.brand-text{display:flex;flex-direction:column;line-height:1.16}
.brand-main{font-size:17px;font-weight:800;color:var(--brand-900);letter-spacing:.02em}
.brand-sub{font-size:12px;color:var(--ink-3);letter-spacing:.1em}
.nav-links{display:flex;align-items:center;gap:var(--sp-5);margin-left:auto}
.nav-link{
  position:relative;font-size:17px;color:var(--ink-2);text-decoration:none;
  padding:6px 0;white-space:nowrap;transition:color var(--t-fast);
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--accent-500);border-radius:2px;transition:width var(--t);
}
.nav-link:hover{color:var(--brand-700)}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--brand-700);font-weight:600}
.nav-link.is-active::after{width:100%}
.nav-actions{display:flex;align-items:center;gap:var(--sp-3);flex-shrink:0}
.nav-login{
  font-size:16px;color:var(--brand-700);text-decoration:none;
  border-bottom:2px solid transparent;padding-bottom:2px;transition:var(--t-fast);
}
.nav-login:hover{border-bottom-color:var(--accent-500);color:var(--accent-600)}
.menu-toggle{
  display:none;width:44px;height:44px;border-radius:50%;
  border:1px solid var(--line);background:var(--surface);cursor:pointer;
  flex-direction:column;gap:5px;align-items:center;justify-content:center;
  transition:var(--t-fast);
}
.menu-toggle:hover{border-color:var(--brand-500);background:var(--brand-100)}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--brand-900);border-radius:2px;transition:var(--t-fast)}
.menu-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-toggle.is-open span:nth-child(2){opacity:0}
.menu-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- 移动抽屉 ---------- */
.drawer{
  position:fixed;top:0;right:0;height:100%;width:88%;max-width:380px;
  background:var(--surface);z-index:120;padding:var(--sp-4);
  display:flex;flex-direction:column;gap:var(--sp-4);
  transform:translateX(102%);transition:transform var(--t);box-shadow:var(--sh-3);
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:var(--sp-3);border-bottom:1px solid var(--line)}
.drawer-close{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:var(--surface);
  cursor:pointer;font-size:18px;color:var(--ink-2);line-height:1;transition:var(--t-fast);
}
.drawer-close:hover{background:var(--brand-100);color:var(--brand-700)}
.drawer-links{display:flex;flex-direction:column;gap:4px}
.drawer-link{
  display:block;padding:14px 12px;border-radius:var(--r-sm);text-decoration:none;
  color:var(--ink);font-size:17px;border-left:2px solid transparent;transition:var(--t-fast);
}
.drawer-link:hover,.drawer-link.is-active{background:var(--brand-100);color:var(--brand-700);border-left-color:var(--accent-500)}
.drawer-foot{margin-top:auto;display:flex;flex-direction:column;gap:var(--sp-3);padding-top:var(--sp-4);border-top:1px solid var(--line)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,26,24,.42);z-index:110;
  opacity:0;visibility:hidden;transition:opacity var(--t),visibility var(--t);
}
.drawer-mask.is-open{opacity:1;visibility:visible}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--ink-3);padding:var(--sp-5) 0 0;line-height:1.6;
}
.breadcrumb a{color:var(--ink-3);text-decoration:none;transition:var(--t-fast)}
.breadcrumb a:hover{color:var(--brand-700)}
.breadcrumb .sep{color:var(--ink-3);opacity:.7}
.breadcrumb .crumb-current{
  color:var(--ink-2);max-width:38ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}

/* ---------- 文章头 ---------- */
.article-head{max-width:860px;margin:0 auto;padding:var(--sp-4) 0 var(--sp-5)}
.article-head h1{
  font-size:38px;line-height:1.3;font-weight:800;letter-spacing:-.01em;
  color:var(--brand-900);margin:var(--sp-3) 0 var(--sp-3);
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:14px;color:var(--ink-3);line-height:1.6;
}
.article-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--ink-3);display:inline-block;opacity:.7}
.article-rule{max-width:860px;margin:0 auto;height:1px;background:var(--line)}

/* ---------- 封面 ---------- */
.article-cover{max-width:960px;margin:var(--sp-5) auto 0;position:relative}
.article-cover::after{
  content:"";position:absolute;right:-12px;bottom:-12px;width:120px;height:120px;
  border-radius:var(--r-big);background:var(--brand-100);z-index:-1;
}
.article-cover img{
  width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:18px;
  border:1px solid var(--line);box-shadow:var(--sh-2);
  background:linear-gradient(135deg,var(--brand-100),var(--brand-500));
}
.article-cover figcaption{margin-top:12px;font-size:13px;color:var(--ink-3);text-align:center}

/* ---------- 文章布局 ---------- */
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr);gap:var(--sp-6);
  max-width:760px;margin:0 auto;padding:var(--sp-6) 0 0;
}
.article-body{font-size:17px;line-height:1.95;color:var(--ink);min-width:0;word-wrap:break-word}
.article-body p{margin:0 0 1.2em}
.article-body h2{
  font-size:26px;line-height:1.35;font-weight:700;color:var(--brand-900);
  margin:40px 0 16px;scroll-margin-top:110px;letter-spacing:-.005em;
}
.article-body h3{font-size:21px;line-height:1.4;font-weight:700;color:var(--brand-900);margin:28px 0 10px}
.article-body h2:first-child,.article-body h3:first-child{margin-top:0}
.article-body blockquote{
  margin:28px 0;padding:20px 24px;border-left:3px solid var(--accent-500);
  background:linear-gradient(90deg,var(--accent-100),rgba(248,230,216,0));
  border-radius:0 var(--r-img) var(--r-img) 0;
  font-family:var(--font-serif);font-size:18px;line-height:1.85;color:var(--brand-900);
}
.article-body ul,.article-body ol{padding-left:24px;margin:0 0 1.2em}
.article-body li{margin-bottom:10px}
.article-body ul li::marker{color:var(--accent-500)}
.article-body ol li::marker{color:var(--accent-500);font-weight:700}
.article-body a{
  color:var(--brand-700);text-decoration:underline;text-decoration-thickness:1px;
  text-underline-offset:4px;background:linear-gradient(transparent 72%,rgba(46,107,87,.28) 72%);
  transition:background var(--t-fast);
}
.article-body a:hover{background:linear-gradient(transparent 0,rgba(46,107,87,.26) 0)}
.article-body img{max-width:100%;height:auto;border-radius:var(--r-img);margin:24px auto;box-shadow:var(--sh-1)}
.article-body figure{margin:28px 0}
.article-body figcaption{margin-top:12px;font-size:13px;color:var(--ink-3);text-align:center}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px}
.article-body th{background:var(--brand-100);color:var(--brand-900);font-weight:700;text-align:left;padding:12px 14px;border:1px solid var(--line)}
.article-body td{padding:12px 14px;border:1px solid var(--line);color:var(--ink-2)}
.article-body tr:hover td{background:var(--surface-2)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:40px 0}

/* ---------- 目录 ---------- */
.article-toc{display:none}
.toc-title{font-size:12px;letter-spacing:.16em;color:var(--ink-3);margin-bottom:14px;text-transform:uppercase}
.toc-list{list-style:none;padding:0;margin:0;border-left:1px solid var(--line)}
.toc-list a{
  display:block;padding:8px 0 8px 14px;margin-left:-1px;
  font-size:14px;line-height:1.55;color:var(--ink-2);text-decoration:none;
  border-left:2px solid transparent;transition:var(--t-fast);
}
.toc-list a:hover{color:var(--brand-700)}
.toc-list a.is-current{color:var(--brand-700);font-weight:600;border-left-color:var(--accent-500)}

/* ---------- 文末 ---------- */
.article-foot{margin-top:var(--sp-6);padding-top:var(--sp-4);border-top:1px solid var(--line)}
.foot-label{font-size:13px;letter-spacing:.1em;color:var(--ink-3);margin-bottom:12px}
.tag-row{display:flex;flex-wrap:wrap;gap:10px}
.author-card{
  display:flex;gap:16px;align-items:flex-start;margin-top:var(--sp-4);
  padding:20px;border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--surface);box-shadow:var(--sh-1);
}
.author-avatar{
  width:52px;height:52px;border-radius:50%;flex-shrink:0;
  background:var(--brand-100);color:var(--brand-700);
  display:grid;place-items:center;font-weight:800;font-size:17px;
}
.author-name{font-size:16px;font-weight:700;color:var(--brand-900);line-height:1.5}
.author-desc{font-size:14px;color:var(--ink-2);line-height:1.7;margin-top:4px}
.share-row{display:flex;align-items:center;gap:12px;margin-top:var(--sp-4);flex-wrap:wrap}
.share-row .foot-label{margin:0 6px 0 0}
.share-btn{
  width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:var(--surface);
  display:grid;place-items:center;cursor:pointer;color:var(--ink-2);transition:var(--t-fast);
}
.share-btn:hover{border-color:var(--brand-500);background:var(--brand-100);color:var(--brand-700);transform:translateY(-2px)}
.share-btn svg{width:18px;height:18px;fill:currentColor}

/* ---------- 相关推荐 ---------- */
.related{padding:var(--sp-8) 0 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:var(--sp-4);margin-bottom:var(--sp-5)}
.section-head h2{font-size:32px;line-height:1.3;font-weight:800;color:var(--brand-900);letter-spacing:-.01em}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--sp-4)}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);text-decoration:none;color:inherit;
  display:flex;flex-direction:column;transition:transform var(--t),box-shadow var(--t);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.card-media{overflow:hidden;aspect-ratio:16/9;background:var(--brand-100)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform var(--t)}
.card:hover .card-media img{transform:scale(1.04)}
.card-body{padding:20px;display:flex;flex-direction:column;gap:12px;flex:1}
.card-body h3{font-size:19px;line-height:1.5;font-weight:700;color:var(--brand-900);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-body p{font-size:15px;line-height:1.75;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-more{margin-top:auto;font-size:14px;font-weight:600;color:var(--accent-600)}

/* ---------- 上一篇 / 下一篇 ---------- */
.post-nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:var(--sp-6)}
.post-nav-item{
  display:block;padding:20px 22px;border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--surface);text-decoration:none;color:inherit;box-shadow:var(--sh-1);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.post-nav-item:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:var(--brand-500)}
.post-nav-item.is-disabled{opacity:.45;pointer-events:none}
.post-nav-kicker{font-size:13px;color:var(--ink-3);letter-spacing:.06em;margin-bottom:8px}
.post-nav-title{font-size:16px;font-weight:700;color:var(--brand-900);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.back-row{display:flex;justify-content:center;margin-top:var(--sp-5)}

/* ---------- 空态 ---------- */
.empty-state{
  min-height:240px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:14px;text-align:center;padding:var(--sp-6) var(--sp-4);
  background:var(--surface);border:1px dashed var(--line);border-radius:var(--r-card);
}
.empty-icon{
  width:56px;height:56px;border-radius:50%;background:var(--brand-100);color:var(--brand-700);
  display:grid;place-items:center;font-size:22px;font-weight:800;
}
.empty-title{font-size:20px;font-weight:700;color:var(--brand-900)}
.empty-desc{font-size:15px;color:var(--ink-2);max-width:420px;line-height:1.8}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.72);margin-top:var(--sp-8);padding:var(--sp-7) 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:var(--sp-6);padding-bottom:var(--sp-6)}
.brand-footer .brand-main{color:#fff}
.brand-footer .brand-sub{color:rgba(255,255,255,.55)}
.brand-footer .brand-mark{border-color:rgba(255,255,255,.55)}
.brand-footer .brand-mark::after{border-color:rgba(255,255,255,.24)}
.footer-desc{font-size:14px;line-height:1.9;color:rgba(255,255,255,.72);margin-top:var(--sp-3);max-width:340px}
.footer-social{display:flex;gap:12px;margin-top:var(--sp-4)}
.social-btn{
  width:40px;height:40px;border-radius:50%;border:1px solid rgba(255,255,255,.18);
  display:grid;place-items:center;color:rgba(255,255,255,.72);text-decoration:none;
  transition:var(--t-fast);
}
.social-btn:hover{background:var(--brand-700);border-color:var(--brand-700);color:#fff;transform:translateY(-2px)}
.social-btn svg{width:17px;height:17px;fill:currentColor}
.footer-col h3{font-size:15px;font-weight:700;color:#fff;margin-bottom:var(--sp-3);letter-spacing:.04em}
.footer-links{display:flex;flex-direction:column;gap:12px}
.footer-links a{
  font-size:14px;color:rgba(255,255,255,.72);text-decoration:none;
  border-left:2px solid transparent;padding-left:0;transition:var(--t-fast);
}
.footer-links a:hover{color:#fff;border-left-color:var(--accent-500);padding-left:8px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:20px 0 28px;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.55);
}
.footer-bottom p{margin:0}

/* ---------- 显现动画 ---------- */
.js [data-reveal]{opacity:0;transform:translateY(18px);transition:opacity 620ms var(--ease),transform 620ms var(--ease)}
.js [data-reveal].is-visible{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .article-layout{max-width:780px}
}
@media (max-width:1023px){
  .nav-links{display:none}
  .menu-toggle{display:flex}
  .nav-login{display:none}
  .header-inner{gap:var(--sp-3)}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .article-head h1{font-size:32px}
  .article-body h2{font-size:24px}
  .article-body h3{font-size:20px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:var(--sp-5)}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:767px){
  body{font-size:16px}
  .header-inner{height:60px}
  .brand-sub{display:none}
  .brand-mark{width:32px;height:32px}
  .container{padding:0 var(--sp-3)}
  .article-head h1{font-size:30px}
  .article-head{padding:var(--sp-3) 0 var(--sp-4)}
  .breadcrumb{padding-top:var(--sp-3)}
  .breadcrumb .crumb-current{max-width:24ch}
  .article-layout{padding-top:var(--sp-5);gap:var(--sp-5)}
  .article-cover{margin-top:var(--sp-4)}
  .article-cover::after{display:none}
  .related-grid{grid-template-columns:1fr}
  .post-nav{grid-template-columns:1fr}
  .section-head h2{font-size:24px}
  .related{padding-top:var(--sp-7)}
  .footer-grid{grid-template-columns:1fr}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap}
}
@media (max-width:479px){
  .btn-sm{height:44px;padding:0 18px;font-size:15px}
  .btn-lg{width:100%;height:48px;padding:0 20px;font-size:16px}
  .article-head h1{font-size:28px}
  .article-body h2{font-size:22px}
  .article-body blockquote{padding:16px 18px;font-size:17px}
}
@media (min-width:1280px){
  .article-toc{
    display:block;position:sticky;top:104px;align-self:start;
    max-height:calc(100vh - 150px);overflow:auto;
  }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
:root{
  --brand-900:#0F302A;
  --brand-700:#1B4D3E;
  --brand-500:#2E6B57;
  --brand-100:#DCE9E3;
  --accent-600:#C9631F;
  --accent-500:#E07A3F;
  --accent-100:#F8E6D8;
  --bg:#F6F3ED;
  --surface:#FFFFFF;
  --surface-2:#EFEAE1;
  --ink-900:#141A18;
  --ink:#1C211F;
  --ink-2:#4B5651;
  --ink-3:#7C8781;
  --line:#E4DED4;
  --success:#2F7D5B;
  --warn:#C98A1F;
  --error:#B8433A;
  --r-card:18px;
  --r-img:14px;
  --r-big:20px;
  --r-pill:999px;
  --r-sm:12px;
  --sh-1:0 1px 2px rgba(15,48,42,.06);
  --sh-2:0 10px 30px -12px rgba(15,48,42,.18);
  --sh-3:0 18px 44px -16px rgba(15,48,42,.26);
  --ease:cubic-bezier(.2,.7,.2,1);
  --t:450ms cubic-bezier(.2,.7,.2,1);
  --t-fast:240ms cubic-bezier(.2,.7,.2,1);
  --font:'PingFang SC','HarmonyOS Sans SC','Microsoft YaHei','Noto Sans SC',sans-serif;
  --serif:'Songti SC','Noto Serif SC',Georgia,serif;
}

/* ===== 基础重置 ===== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:17px;
  line-height:1.9;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
h1,h2,h3{line-height:1.3;color:var(--ink);}
figure{margin:0;}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{
  outline:3px solid var(--brand-500);
  outline-offset:2px;
  border-radius:4px;
}

/* ===== 容器 ===== */
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-size:15px;
  font-weight:600;
  line-height:1;
  cursor:pointer;
  white-space:nowrap;
  transition:background-color var(--t-fast),color var(--t-fast),transform var(--t-fast),box-shadow var(--t),border-color var(--t-fast);
}
.btn-primary{
  background:var(--accent-500);
  color:#fff;
  border:1px solid transparent;
  border-radius:var(--r-pill);
  height:46px;
  padding:0 24px;
  box-shadow:var(--sh-1);
}
.btn-primary:hover{background:var(--accent-600);transform:translateY(-2px);box-shadow:var(--sh-3);}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-1);}
.btn-primary[disabled],.btn-primary.is-disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none;}
.btn-ghost{
  background:transparent;
  color:var(--brand-700);
  border:1.5px solid var(--brand-700);
  border-radius:var(--r-sm);
  height:46px;
  padding:0 22px;
}
.btn-ghost:hover{background:rgba(220,233,227,.55);}
.btn-ghost:active{background:rgba(220,233,227,.85);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.text-link{
  color:var(--brand-700);
  font-size:15px;
  border-bottom:2px solid var(--brand-100);
  padding-bottom:2px;
  transition:border-color var(--t-fast),color var(--t-fast);
}
.text-link:hover{border-bottom-color:var(--accent-500);color:var(--accent-600);}

/* ===== 顶栏 ===== */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(246,243,237,.9);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:background-color var(--t),box-shadow var(--t),border-color var(--t);
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.96);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom-color:var(--line);
  box-shadow:var(--sh-1);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:24px;
  height:76px;
}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.brand-mark{
  width:36px;height:36px;
  border-radius:50%;
  border:2px solid var(--brand-700);
  display:grid;place-items:center;
  background:var(--surface);
  position:relative;
  transition:transform var(--t);
}
.brand-mark::after{
  content:"";width:13px;height:13px;border-radius:50%;background:var(--brand-700);
}
.brand:hover .brand-mark{transform:rotate(-12deg) scale(1.05);}
.brand-text{display:flex;flex-direction:column;line-height:1.16;}
.brand-main{font-size:16px;font-weight:700;color:var(--brand-900);letter-spacing:.02em;}
.brand-sub{font-size:12px;color:var(--ink-3);letter-spacing:.04em;}
.nav-links{display:flex;align-items:center;gap:32px;margin-left:auto;}
.nav-link{
  position:relative;
  font-size:17px;
  color:var(--ink-2);
  padding:6px 0;
  transition:color var(--t-fast);
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--accent-500);
  transition:width var(--t-fast);
}
.nav-link:hover{color:var(--brand-700);}
.nav-link:hover::after{width:100%;}
.nav-link.is-active{color:var(--brand-700);font-weight:600;}
.nav-link.is-active::after{width:100%;}
.header-actions{display:flex;align-items:center;gap:16px;}
.link-login{
  font-size:15px;color:var(--ink-2);
  border-bottom:2px solid transparent;
  padding-bottom:2px;
  transition:color var(--t-fast),border-color var(--t-fast);
}
.link-login:hover{color:var(--brand-700);border-bottom-color:var(--accent-500);}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:50%;
  border:1px solid var(--line);
  background:var(--surface);
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
  transition:border-color var(--t-fast),box-shadow var(--t-fast);
}
.nav-toggle:hover{border-color:var(--brand-500);box-shadow:var(--sh-1);}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--brand-900);}

/* ===== 移动抽屉 ===== */
.drawer{
  position:fixed;
  top:0;right:0;
  width:88%;
  max-width:360px;
  height:100%;
  background:var(--surface);
  z-index:90;
  transform:translateX(102%);
  transition:transform var(--t);
  display:flex;
  flex-direction:column;
  padding:20px 24px 32px;
  box-shadow:var(--sh-3);
}
.drawer.is-open{transform:translateX(0);}
.drawer-top{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line);}
.drawer-title{font-size:15px;font-weight:600;color:var(--brand-900);}
.drawer-close{
  width:44px;height:44px;border-radius:50%;
  font-size:22px;line-height:1;color:var(--ink-2);
  display:grid;place-items:center;
  transition:background-color var(--t-fast),color var(--t-fast);
}
.drawer-close:hover{background:var(--surface-2);color:var(--brand-700);}
.drawer-links{display:flex;flex-direction:column;padding:16px 0;flex:1;}
.drawer-links a{
  padding:16px 4px;
  font-size:17px;
  color:var(--ink-2);
  border-bottom:1px solid var(--line);
  transition:color var(--t-fast),padding-left var(--t-fast);
}
.drawer-links a:hover,.drawer-links a.is-active{color:var(--brand-700);padding-left:12px;font-weight:600;}
.drawer-cta{width:100%;margin-top:16px;}
.drawer-mask{
  position:fixed;inset:0;
  background:rgba(20,26,24,.45);
  z-index:80;
  opacity:0;
  visibility:hidden;
  transition:opacity var(--t),visibility var(--t);
}
.drawer-mask.is-open{opacity:1;visibility:visible;}

/* ===== 面包屑与页面头 ===== */
.page-head{padding:48px 0 0;}
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;
  gap:8px;
  font-size:13px;
  color:var(--ink-3);
}
.breadcrumb a{transition:color var(--t-fast);}
.breadcrumb a:hover{color:var(--brand-700);}
.page-head h1{
  font-size:36px;
  margin-top:16px;
  letter-spacing:.01em;
  max-width:900px;
}
.page-lead{
  font-size:18px;
  line-height:1.9;
  color:var(--ink-2);
  max-width:760px;
  margin-top:16px;
}
.anchor-bar{
  display:flex;
  gap:12px;
  margin-top:32px;
  padding-bottom:16px;
  border-bottom:1px solid var(--line);
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.anchor-bar::-webkit-scrollbar{display:none;}
.pill{
  display:inline-flex;
  align-items:center;
  border:1px solid var(--line);
  background:var(--surface);
  border-radius:var(--r-pill);
  padding:8px 18px;
  font-size:14px;
  color:var(--ink-2);
  white-space:nowrap;
  transition:border-color var(--t-fast),color var(--t-fast),background-color var(--t-fast),transform var(--t-fast);
}
.pill:hover{border-color:var(--brand-500);color:var(--brand-700);transform:translateY(-1px);}
.pill.is-current{background:var(--brand-100);border-color:var(--brand-100);color:var(--brand-700);font-weight:600;}

/* ===== 分类页布局 ===== */
.cat-layout{
  display:grid;
  grid-template-columns:3fr 9fr;
  gap:48px;
  padding:56px 0 88px;
  align-items:start;
}
.side-nav{
  position:sticky;
  top:104px;
  align-self:start;
}
.side-title{
  font-size:12px;
  letter-spacing:.16em;
  color:var(--ink-3);
  text-transform:uppercase;
  margin-bottom:12px;
}
.side-links{display:flex;flex-direction:column;border-left:2px solid var(--line);}
.side-links a{
  display:block;
  padding:10px 0 10px 16px;
  margin-left:-2px;
  font-size:15px;
  color:var(--ink-2);
  border-left:2px solid transparent;
  transition:color var(--t-fast),border-color var(--t-fast),background-color var(--t-fast),padding-left var(--t-fast);
}
.side-links a:hover{color:var(--brand-900);border-left-color:var(--brand-500);background:linear-gradient(90deg,rgba(220,233,227,.5),transparent);padding-left:20px;}
.side-links a.is-current{color:var(--brand-900);font-weight:600;border-left-color:var(--accent-500);}
.side-note{
  margin-top:32px;
  padding:24px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
}
.side-note-title{font-size:16px;font-weight:600;color:var(--brand-900);margin-bottom:8px;}
.side-note p{font-size:14px;line-height:1.8;color:var(--ink-2);margin-bottom:12px;}

.cat-body .block + .block{margin-top:80px;}
.eyebrow{
  display:inline-block;
  font-size:14px;
  font-weight:600;
  color:var(--accent-600);
  letter-spacing:.08em;
  margin-bottom:12px;
  position:relative;
  padding-left:26px;
}
.eyebrow::before{
  content:"";position:absolute;left:0;top:50%;width:18px;height:2px;background:var(--accent-500);
}
.cat-body h2{font-size:32px;margin-bottom:16px;}
.cat-body h3{font-size:20px;}
.cat-body p{color:var(--ink-2);}
.lead-p{font-size:17px;line-height:1.9;color:var(--ink-2);max-width:760px;}
.lead-p + .lead-p{margin-top:1.2em;}

/* ===== 图文交错 ===== */
.split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  align-items:center;
}
.split-media{position:relative;}
.split-media img{
  position:relative;
  z-index:1;
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:var(--brand-100);
}
.split-media::after{
  content:"";
  position:absolute;
  right:-14px;
  bottom:-14px;
  width:104px;
  height:104px;
  border-radius:var(--r-img);
  background:var(--brand-100);
  z-index:0;
}
.split.is-reversed .split-media{order:-1;}
.split.is-reversed .split-media::after{right:auto;left:-14px;}
.check-list{margin-top:20px;display:flex;flex-direction:column;gap:12px;}
.check-list li{
  position:relative;
  padding-left:28px;
  font-size:16px;
  color:var(--ink-2);
  line-height:1.8;
}
.check-list li::before{
  content:"";
  position:absolute;
  left:0;top:12px;
  width:12px;height:12px;
  border-radius:50%;
  background:var(--accent-100);
  border:2px solid var(--accent-500);
}

/* ===== 卡片网格 ===== */
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:32px;
}
.section-head h2{margin-bottom:0;}
.card-grid{
  display:grid;
  grid-template-columns:repeat(6,1fr);
  gap:24px;
}
.info-card{
  grid-column:span 3;
  display:flex;
  flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.info-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--brand-100);}
.info-card--wide{
  grid-column:span 6;
  flex-direction:row;
}
.thumb{
  position:relative;
  width:100%;
  aspect-ratio:16/9;
  overflow:hidden;
  background:var(--brand-100);
}
.thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform var(--t);
}
.info-card:hover .thumb img{transform:scale(1.03);}
.info-card--wide .thumb{
  width:44%;
  flex:none;
  aspect-ratio:auto;
  min-height:250px;
}
.card-body{
  padding:24px;
  display:flex;
  flex-direction:column;
  flex:1;
}
.info-card--wide .card-body{padding:32px;}
.badge{
  display:inline-flex;
  align-items:center;
  align-self:flex-start;
  background:var(--brand-100);
  color:var(--brand-700);
  border-radius:var(--r-pill);
  padding:5px 14px;
  font-size:13px;
  font-weight:600;
  margin-bottom:14px;
}
.card-body h3{
  font-size:19px;
  margin-bottom:10px;
  transition:color var(--t-fast);
}
.info-card:hover .card-body h3{color:var(--brand-700);}
.card-body p{
  font-size:15px;
  line-height:1.8;
  color:var(--ink-2);
  margin-bottom:20px;
}
.card-foot{
  margin-top:auto;
  display:flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--accent-600);
  font-weight:600;
  transition:gap var(--t-fast);
}
.info-card:hover .card-foot{gap:14px;}

/* ===== FAQ ===== */
.faq-wrap{max-width:760px;}
.faq-item{
  position:relative;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-img);
  overflow:hidden;
  transition:border-color var(--t-fast),box-shadow var(--t-fast);
}
.faq-item + .faq-item{margin-top:12px;}
.faq-item:hover{border-color:var(--brand-100);}
.faq-item[open]{border-color:var(--brand-100);box-shadow:var(--sh-1);}
.faq-item[open]::before{
  content:"";
  position:absolute;
  left:0;top:0;bottom:0;
  width:3px;
  background:var(--accent-500);
}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  cursor:pointer;
  list-style:none;
  padding:20px 24px;
  font-size:17px;
  font-weight:600;
  color:var(--ink);
  transition:color var(--t-fast);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--brand-700);}
.faq-icon{
  position:relative;
  width:18px;height:18px;
  flex:none;
  transition:transform var(--t-fast);
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  background:var(--accent-500);
  border-radius:2px;
}
.faq-icon::before{left:0;top:8px;width:18px;height:2px;}
.faq-icon::after{left:8px;top:0;width:2px;height:18px;transition:opacity var(--t-fast);}
.faq-item[open] .faq-icon{transform:rotate(90deg);}
.faq-item[open] .faq-icon::after{opacity:0;}
.faq-answer{
  padding:0 24px 22px;
  font-size:17px;
  line-height:1.9;
  color:var(--ink-2);
}

/* ===== CTA 通栏 ===== */
.cta-band{
  position:relative;
  overflow:hidden;
  border-radius:var(--r-big);
  background:var(--brand-900);
  padding:48px 56px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  color:#fff;
}
.cta-band::before{
  content:"";
  position:absolute;inset:0;
  background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity:.18;
}
.cta-band > *{position:relative;z-index:1;}
.cta-band h2{color:#fff;font-size:32px;margin-bottom:10px;}
.cta-band p{color:rgba(255,255,255,.8);font-size:16px;max-width:620px;}
.cta-band .btn-primary{flex:none;}

/* ===== 页脚 ===== */
.site-footer{
  background:var(--ink-900);
  color:#fff;
  padding:64px 0 0;
  margin-top:96px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:48px;
  padding-bottom:48px;
}
.footer-brand .brand-main{color:#fff;}
.footer-brand .brand-sub{color:rgba(255,255,255,.6);}
.footer-brand .brand-mark{background:transparent;border-color:rgba(255,255,255,.7);}
.footer-brand .brand-mark::after{background:rgba(255,255,255,.85);}
.footer-brand p{
  margin-top:16px;
  font-size:14px;
  line-height:1.9;
  color:rgba(255,255,255,.72);
  max-width:360px;
}
.footer-col h3{
  font-size:15px;
  color:#fff;
  margin-bottom:16px;
  letter-spacing:.04em;
}
.footer-col ul{display:flex;flex-direction:column;gap:12px;}
.footer-col li span,.footer-col a{
  font-size:14px;
  color:rgba(255,255,255,.72);
  transition:color var(--t-fast),padding-left var(--t-fast),border-color var(--t-fast);
  border-left:2px solid transparent;
  padding-left:0;
  display:inline-block;
}
.footer-col a:hover{color:#fff;border-left-color:var(--accent-500);padding-left:8px;}
.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-top:24px;
  padding-bottom:32px;
}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,.6);}

/* ===== 响应式 ===== */
@media (min-width:1024px){
  .nav-toggle{display:none;}
  .drawer,.drawer-mask{display:none;}
}
@media (max-width:1150px){
  .cat-layout{grid-template-columns:4fr 8fr;gap:32px;}
}
@media (max-width:1023px){
  .nav-links,.link-login{display:none;}
  .nav-toggle{display:flex;margin-left:auto;}
  .header-actions{margin-left:auto;}
  .cat-layout{grid-template-columns:1fr;padding:40px 0 72px;}
  .side-nav{position:static;top:auto;}
  .side-links{
    flex-direction:row;
    border-left:0;
    border-bottom:2px solid var(--line);
    overflow-x:auto;
    scrollbar-width:none;
  }
  .side-links::-webkit-scrollbar{display:none;}
  .side-links a{
    margin-left:0;
    border-left:0;
    border-bottom:2px solid transparent;
    white-space:nowrap;
    padding:10px 16px;
  }
  .side-links a:hover,.side-links a.is-current{border-left:0;border-bottom-color:var(--accent-500);padding-left:16px;background:none;}
  .side-note{display:none;}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .info-card,.info-card--wide{grid-column:span 1;flex-direction:column;}
  .info-card--wide .thumb{width:100%;aspect-ratio:16/9;min-height:0;}
  .info-card--wide .card-body{padding:24px;}
  .info-card--wide{grid-column:span 2;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .header-inner{height:60px;gap:12px;}
  .page-head{padding:32px 0 0;}
  .page-head h1{font-size:30px;}
  .page-lead{font-size:16px;}
  .cat-body h2{font-size:24px;}
  .cat-body .block + .block{margin-top:64px;}
  .split{grid-template-columns:1fr;gap:24px;}
  .split.is-reversed .split-media{order:0;}
  .split-media::after{width:72px;height:72px;right:-8px;bottom:-8px;}
  .split.is-reversed .split-media::after{left:-8px;right:auto;}
  .card-grid{grid-template-columns:1fr;}
  .info-card--wide{grid-column:span 1;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px 24px;}
  .cta-band h2{font-size:24px;}
  .cta-band .btn-primary{width:100%;}
  .faq-item summary{font-size:16px;padding:18px 20px;}
  .faq-answer{padding:0 20px 20px;font-size:16px;}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding-bottom:32px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .site-footer{margin-top:72px;padding-top:48px;}
}
@media (max-width:520px){
  .header-actions .btn-primary{height:40px;padding:0 16px;font-size:14px;}
  .brand-main{font-size:15px;}
  .brand-sub{font-size:11px;}
}

/* roulang page: category2 */
:root{
  --brand-900:#0F302A;
  --brand-700:#1B4D3E;
  --brand-500:#2E6B57;
  --brand-100:#DCE9E3;
  --accent-600:#C9631F;
  --accent-500:#E07A3F;
  --accent-100:#F8E6D8;
  --bg:#F6F3ED;
  --surface:#FFFFFF;
  --surface-2:#EFEAE1;
  --ink-900:#141A18;
  --ink:#1C211F;
  --ink-2:#4B5651;
  --ink-3:#7C8781;
  --line:#E4DED4;
  --success:#2F7D5B;
  --warn:#C98A1F;
  --error:#B8433A;
  --sh-1:0 1px 2px rgba(15,48,42,.06);
  --sh-2:0 10px 30px -12px rgba(15,48,42,.18);
  --sh-3:0 18px 44px -16px rgba(15,48,42,.26);
  --r-card:18px;
  --r-img:14px;
  --r-big:20px;
  --r-pill:999px;
  --r-btn:12px;
  --t:450ms cubic-bezier(.2,.7,.2,1);
  --t-fast:240ms cubic-bezier(.2,.7,.2,1);
  --sp-8:8px; --sp-12:12px; --sp-16:16px; --sp-24:24px;
  --sp-32:32px; --sp-48:48px; --sp-64:64px; --sp-96:96px;
  --nav-h:76px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:'PingFang SC','HarmonyOS Sans SC','Microsoft YaHei','Noto Sans SC',sans-serif;
  font-size:17px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,p{margin:0;}
:focus-visible{outline:3px solid var(--brand-500);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.wide{max-width:1360px;}
.narrow{max-width:760px;}

/* ============ header ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,243,237,.92);
  border-bottom:1px solid transparent;
  transition:background var(--t),border-color var(--t),box-shadow var(--t);
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.96);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  box-shadow:var(--sh-1);
}
.header-inner{
  height:var(--nav-h);
  display:flex;align-items:center;gap:24px;
}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.brand-mark{
  width:36px;height:36px;border-radius:50%;
  border:2.5px solid var(--brand-700);
  display:flex;align-items:center;justify-content:center;
  background:var(--surface);
}
.brand-mark::after{
  content:"";width:14px;height:14px;border-radius:50%;background:var(--accent-500);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{font-size:17px;font-weight:800;letter-spacing:.5px;color:var(--brand-900);}
.brand-text em{font-style:normal;font-size:12px;color:var(--ink-3);letter-spacing:.4px;}
.nav-links{display:flex;align-items:center;gap:32px;margin-left:auto;}
.nav-link{
  position:relative;font-size:17px;color:var(--ink-2);
  padding:6px 0;transition:color var(--t-fast);
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--accent-500);transition:width var(--t-fast);
}
.nav-link:hover{color:var(--brand-700);}
.nav-link:hover::after{width:100%;}
.nav-link.is-active{color:var(--brand-700);font-weight:600;}
.nav-link.is-active::after{width:100%;background:var(--brand-700);}
.header-actions{display:flex;align-items:center;gap:16px;margin-left:16px;}
.link-login{font-size:16px;color:var(--ink-2);transition:color var(--t-fast);}
.link-login:hover{color:var(--brand-700);}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:16px;font-weight:600;line-height:1;
  border:1.5px solid transparent;
  transition:background var(--t-fast),color var(--t-fast),border-color var(--t-fast),transform var(--t-fast),box-shadow var(--t-fast);
}
.btn-primary{
  background:var(--accent-500);color:#fff;
  border-radius:var(--r-pill);
  min-height:46px;padding:0 26px;
  box-shadow:var(--sh-1);
}
.btn-primary:hover{background:var(--accent-600);transform:translateY(-2px);box-shadow:var(--sh-3);}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-1);}
.btn-ghost{
  background:transparent;color:var(--brand-700);
  border:1.5px solid var(--brand-700);
  border-radius:var(--r-btn);
  min-height:48px;padding:0 24px;
}
.btn-ghost:hover{background:rgba(220,233,227,.6);}
.btn-ghost:active{transform:translateY(1px);}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none;}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--brand-700);font-weight:600;font-size:16px;
  border-bottom:2px solid var(--brand-700);border-radius:0;
  padding-bottom:2px;transition:color var(--t-fast),border-color var(--t-fast);
}
.btn-text:hover{color:var(--accent-600);border-color:var(--accent-500);}

.nav-toggle{
  display:none;width:44px;height:44px;border-radius:50%;
  background:var(--surface);border:1px solid var(--line);
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--brand-900);transition:transform var(--t-fast),opacity var(--t-fast);}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.drawer{
  position:fixed;top:0;right:0;height:100%;width:88%;max-width:380px;
  background:var(--surface);z-index:80;
  transform:translateX(102%);transition:transform var(--t);
  display:flex;flex-direction:column;padding:24px;
  box-shadow:var(--sh-3);
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;}
.drawer-close{
  width:44px;height:44px;border-radius:50%;border:1px solid var(--line);
  background:var(--surface-2);font-size:20px;line-height:1;color:var(--ink-2);
}
.drawer nav{display:flex;flex-direction:column;gap:4px;}
.drawer nav a{
  padding:14px 12px;border-radius:12px;font-size:17px;color:var(--ink-2);
  border-left:3px solid transparent;transition:background var(--t-fast),color var(--t-fast);
}
.drawer nav a:hover{background:var(--surface-2);color:var(--brand-700);}
.drawer nav a.is-active{background:var(--brand-100);color:var(--brand-700);font-weight:600;border-left-color:var(--accent-500);}
.drawer-cta{margin-top:auto;padding-top:24px;}
.drawer-cta .btn-primary{width:100%;}
.mask{
  position:fixed;inset:0;background:rgba(20,26,24,.42);z-index:70;
  opacity:0;visibility:hidden;transition:opacity var(--t),visibility var(--t);
}
.mask.is-open{opacity:1;visibility:visible;}

/* ============ page head ============ */
.page-head{padding:48px 0 0;}
.crumbs{font-size:13px;color:var(--ink-3);display:flex;flex-wrap:wrap;gap:8px;align-items:center;}
.crumbs a:hover{color:var(--brand-700);}
.crumbs span.sep{color:var(--ink-3);}
.crumbs .current{color:var(--ink-2);}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:14px;color:var(--accent-600);font-weight:600;letter-spacing:.6px;
  margin:24px 0 12px;
}
.eyebrow::before{content:"";width:24px;height:2px;background:var(--accent-500);display:block;}
h1{font-size:36px;line-height:1.3;font-weight:800;color:var(--brand-900);letter-spacing:-.2px;}
.lede{font-size:18px;line-height:1.85;color:var(--ink-2);max-width:760px;margin-top:16px;}
.anchor-row{
  display:flex;gap:12px;margin-top:32px;padding-bottom:24px;
  overflow-x:auto;border-bottom:1px solid var(--line);
  scrollbar-width:none;-ms-overflow-style:none;
}
.anchor-row::-webkit-scrollbar{display:none;}
.pill{
  display:inline-flex;align-items:center;gap:6px;white-space:nowrap;
  padding:9px 18px;border-radius:var(--r-pill);
  background:var(--surface);border:1px solid var(--line);
  font-size:15px;color:var(--ink-2);min-height:44px;
  transition:background var(--t-fast),color var(--t-fast),border-color var(--t-fast),transform var(--t-fast);
}
.pill:hover{background:var(--brand-100);color:var(--brand-700);border-color:var(--brand-100);transform:translateY(-2px);}
.tag{
  display:inline-flex;align-items:center;padding:5px 12px;border-radius:var(--r-pill);
  background:var(--brand-100);color:var(--brand-700);font-size:13px;font-weight:600;
}
.tag-warm{background:var(--accent-100);color:var(--accent-600);}

/* ============ banner ============ */
.banner{padding:48px 0 0;}
.banner-figure{
  position:relative;border-radius:var(--r-big);overflow:hidden;
  border:1px solid var(--line);background:var(--brand-100);
  aspect-ratio:21/9;box-shadow:var(--sh-1);
}
.banner-figure img{width:100%;height:100%;object-fit:cover;}
.banner-caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:28px 32px;color:#fff;
  background:linear-gradient(to top,rgba(15,48,42,.86),rgba(15,48,42,0));
}
.banner-caption strong{display:block;font-size:22px;font-weight:700;line-height:1.4;}
.banner-caption span{display:block;font-size:14px;color:rgba(255,255,255,.82);margin-top:6px;}

/* ============ sections ============ */
.section{padding:80px 0 0;}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head h2{font-size:32px;line-height:1.3;font-weight:800;color:var(--brand-900);}
.section-head h3{font-size:20px;font-weight:700;color:var(--brand-900);}
.section-head p{font-size:17px;color:var(--ink-2);margin-top:14px;}
.section-split{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:40px;}
.section-split h2{font-size:32px;font-weight:800;color:var(--brand-900);line-height:1.3;}

/* 指标条 */
.metrics{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
}
.metric{padding:28px 24px;border-left:1px solid var(--line);}
.metric:first-child{border-left:none;}
.metric b{display:block;font-size:38px;line-height:1.1;font-weight:800;color:var(--brand-700);letter-spacing:-1px;}
.metric b em{font-style:normal;font-size:18px;margin-left:2px;}
.metric span{display:block;font-size:14px;color:var(--ink-3);margin-top:10px;line-height:1.6;}

/* 瀑布 */
.waterfall{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start;}
.waterfall-col{display:flex;flex-direction:column;gap:24px;}
.waterfall-col.offset{margin-top:48px;}
.wf-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform var(--t),box-shadow var(--t);
}
.wf-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.wf-figure{aspect-ratio:4/3;overflow:hidden;background:var(--brand-100);}
.wf-figure.tall{aspect-ratio:5/4;}
.wf-figure.wide{aspect-ratio:16/9;}
.wf-figure img{width:100%;height:100%;object-fit:cover;transition:transform var(--t);}
.wf-card:hover .wf-figure img{transform:scale(1.03);}
.wf-body{padding:22px;}
.wf-body h3{font-size:19px;font-weight:700;line-height:1.5;color:var(--brand-900);margin-top:12px;}
.wf-body p{font-size:15px;color:var(--ink-2);margin-top:10px;line-height:1.8;}
.check-list{margin-top:16px;display:flex;flex-direction:column;gap:10px;}
.check-list li{display:flex;gap:10px;font-size:15px;color:var(--ink-2);line-height:1.7;}
.check-list li::before{
  content:"";flex-shrink:0;width:8px;height:8px;border-radius:50%;
  background:var(--accent-500);margin-top:9px;
}

/* 图文交错 */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.split.reverse .split-media{order:2;}
.split-media{border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);aspect-ratio:4/3;background:var(--brand-100);box-shadow:var(--sh-1);}
.split-media img{width:100%;height:100%;object-fit:cover;transition:transform var(--t);}
.split-media:hover img{transform:scale(1.03);}
.split-body h2{font-size:32px;line-height:1.3;font-weight:800;color:var(--brand-900);}
.split-body p{font-size:17px;line-height:1.9;color:var(--ink-2);margin-top:20px;}
.step-list{margin-top:24px;display:flex;flex-direction:column;gap:16px;}
.step-list li{
  display:flex;gap:16px;padding:16px 0;border-top:1px solid var(--line);
}
.step-list li:first-child{border-top:none;padding-top:0;}
.step-num{
  flex-shrink:0;width:32px;height:32px;border-radius:50%;
  background:var(--brand-100);color:var(--brand-700);
  font-size:14px;font-weight:700;display:flex;align-items:center;justify-content:center;
}
.step-list strong{display:block;font-size:17px;color:var(--brand-900);font-weight:700;}
.step-list span{display:block;font-size:15px;color:var(--ink-2);margin-top:4px;line-height:1.75;}
.divider{height:1px;background:var(--line);margin:56px 0;}

/* 精选卡片 */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.card{
  display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform var(--t),box-shadow var(--t);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.card-figure{aspect-ratio:16/9;overflow:hidden;background:var(--brand-100);}
.card-figure img{width:100%;height:100%;object-fit:cover;transition:transform var(--t);}
.card:hover .card-figure img{transform:scale(1.03);}
.card-body{padding:22px;display:flex;flex-direction:column;flex:1;}
.card-body h3{font-size:19px;font-weight:700;line-height:1.5;color:var(--brand-900);margin-top:12px;}
.card-body p{font-size:15px;color:var(--ink-2);line-height:1.8;margin-top:10px;flex:1;}
.card-foot{
  display:flex;align-items:center;justify-content:space-between;
  margin-top:18px;padding-top:16px;border-top:1px solid var(--line);
  font-size:14px;color:var(--ink-3);
}

/* FAQ */
.faq-wrap{max-width:760px;margin:0 auto;}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:14px;
  margin-bottom:14px;overflow:hidden;position:relative;
  transition:box-shadow var(--t),border-color var(--t);
}
.faq-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--accent-500);opacity:0;transition:opacity var(--t-fast);
}
.faq-item[open]{box-shadow:var(--sh-2);}
.faq-item[open]::before{opacity:1;}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;font-size:17px;font-weight:600;color:var(--brand-900);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-icon{
  flex-shrink:0;width:24px;height:24px;position:relative;
  transition:transform var(--t-fast);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--accent-500);border-radius:2px;
}
.faq-icon::before{left:11px;top:3px;width:2px;height:18px;}
.faq-icon::after{top:11px;left:3px;width:18px;height:2px;}
.faq-item[open] .faq-icon{transform:rotate(45deg);}
.faq-answer{padding:0 24px 22px;font-size:17px;line-height:1.9;color:var(--ink-2);}

/* CTA 带 */
.cta-band{
  background:var(--brand-900);border-radius:var(--r-big);overflow:hidden;
  position:relative;padding:48px;
  display:flex;align-items:center;justify-content:space-between;gap:40px;
  box-shadow:var(--sh-2);
}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center;
  opacity:.14;mix-blend-mode:luminosity;pointer-events:none;
}
.cta-band > *{position:relative;z-index:1;}
.cta-band h2{font-size:30px;line-height:1.35;color:#fff;font-weight:800;}
.cta-band p{font-size:16px;color:rgba(255,255,255,.8);margin-top:12px;max-width:560px;}
.cta-band .btn-primary{flex-shrink:0;}

/* footer */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.72);margin-top:96px;}
.footer-top{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:48px;
  padding:64px 0 48px;
}
.footer-brand .brand-text strong{color:#fff;}
.footer-brand .brand-text em{color:rgba(255,255,255,.6);}
.footer-brand .brand-mark{background:transparent;border-color:var(--brand-100);}
.footer-brand p{font-size:14px;line-height:1.85;margin-top:20px;max-width:320px;color:rgba(255,255,255,.72);}
.socials{display:flex;gap:12px;margin-top:20px;}
.socials a{
  width:38px;height:38px;border-radius:50%;
  border:1px solid rgba(255,255,255,.24);
  display:flex;align-items:center;justify-content:center;
  font-size:13px;color:rgba(255,255,255,.8);
  transition:background var(--t-fast),border-color var(--t-fast),transform var(--t-fast);
}
.socials a:hover{background:var(--brand-700);border-color:var(--brand-700);color:#fff;transform:translateY(-2px);}
.footer-col h4{font-size:16px;color:#fff;font-weight:700;margin-bottom:18px;}
.footer-col ul{display:flex;flex-direction:column;gap:12px;}
.footer-col a{
  font-size:14px;color:rgba(255,255,255,.72);
  display:inline-block;padding-left:0;
  border-left:2px solid transparent;
  transition:color var(--t-fast),padding-left var(--t-fast),border-color var(--t-fast);
}
.footer-col a:hover{color:#fff;padding-left:8px;border-left-color:var(--accent-500);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:24px 0;display:flex;flex-wrap:wrap;gap:16px;
  align-items:center;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.6);
}
.footer-bottom a:hover{color:#fff;}
.footer-links{display:flex;gap:20px;flex-wrap:wrap;}

/* reveal */
.reveal{opacity:0;transform:translateY(18px);transition:opacity 600ms cubic-bezier(.2,.7,.2,1),transform 600ms cubic-bezier(.2,.7,.2,1);}
.reveal.is-visible{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  *{transition:none !important;}
}

/* ============ responsive ============ */
@media (max-width:1023px){
  .nav-links{display:none;}
  .link-login{display:none;}
  .nav-toggle{display:flex;}
  .header-actions .btn-nav{display:none;}
  .waterfall{grid-template-columns:repeat(2,1fr);}
  .waterfall-col.offset{margin-top:32px;}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .footer-top{grid-template-columns:1fr 1fr;gap:40px;}
  .section{padding:72px 0 0;}
  h1{font-size:30px;}
  .section-head h2,.section-split h2,.split-body h2{font-size:26px;}
  .lede{font-size:17px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .waterfall{grid-template-columns:1fr;}
  .waterfall-col.offset{margin-top:0;}
  .card-grid{grid-template-columns:1fr;}
  .metrics{grid-template-columns:1fr 1fr;}
  .metric{border-left:none;border-top:1px solid var(--line);}
  .metric:nth-child(1),.metric:nth-child(2){border-top:none;}
  .metric:nth-child(2n){border-left:1px solid var(--line);}
  .split{grid-template-columns:1fr;gap:28px;}
  .split.reverse .split-media{order:0;}
  .banner-figure{aspect-ratio:16/10;}
  .banner-caption{padding:20px;}
  .banner-caption strong{font-size:18px;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px 24px;}
  .cta-band h2{font-size:24px;}
  .cta-band .btn-primary{width:100%;}
  .footer-top{grid-template-columns:1fr;gap:32px;}
  .section{padding:64px 0 0;}
  .section-split{flex-direction:column;align-items:flex-start;gap:16px;}
}
@media (max-width:519px){
  body{font-size:16px;}
  h1{font-size:26px;}
  .metric b{font-size:30px;}
  .metric{padding:22px 18px;}
  .split-body h2,.section-head h2,.section-split h2{font-size:22px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}