/* roulang page: index */
:root{
  --c-primary:#1A5C9E;
  --c-primary-dark:#13497F;
  --c-primary-light:#EAF2FB;
  --c-accent:#F2842B;
  --c-accent-light:#FDF1E4;
  --c-success:#1F9D74;
  --c-error:#D64545;
  --c-warning:#C98A16;
  --c-bg:#F6F8FB;
  --c-surface:#FFFFFF;
  --c-border:#E4EAF2;
  --c-text:#1F2937;
  --c-text-2:#5B6B7C;
  --c-text-3:#9AA7B4;
  --r-card:14px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(21,45,73,.06), 0 8px 24px rgba(21,45,73,.06);
  --sh-2:0 4px 10px rgba(21,45,73,.08), 0 16px 40px rgba(21,45,73,.12);
  --container:1200px;
  --gap:24px;
  --sec-py:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--c-text);
  background:var(--c-bg);
}
img{max-width:100%;display:block;border-style:none}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--c-primary-dark)}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;border:none;background:none;padding:0}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;color:var(--c-text)}
h1{font-size:clamp(30px,4vw,44px);line-height:1.25;font-weight:700}
h2{font-size:clamp(24px,2.6vw,32px);line-height:1.3;font-weight:700}
h3{font-size:20px;line-height:1.4;font-weight:600}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:var(--sec-py) 0}
.section--tight{padding:72px 0}
.section--alt{background:#fff}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.section-head__left{max-width:680px}
.section-no{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--c-accent);margin-bottom:10px}
.section-desc{color:var(--c-text-2);font-size:15px;margin-top:12px;line-height:1.75}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--c-primary);white-space:nowrap}
.text-link i{transition:transform .2s ease;font-size:12px}
.text-link:hover i{transform:translateX(3px)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,background .18s ease,box-shadow .18s ease,color .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn--primary{background:linear-gradient(180deg,#2069B2 0%,#1A5C9E 100%);color:#fff;box-shadow:0 2px 6px rgba(26,92,158,.24)}
.btn--primary:hover{background:linear-gradient(180deg,#1A5C9E 0%,#13497F 100%);color:#fff;transform:translateY(-1px);box-shadow:0 6px 16px rgba(26,92,158,.28)}
.btn--primary:active{transform:translateY(1px);box-shadow:0 1px 3px rgba(26,92,158,.3)}
.btn--ghost{background:#fff;color:var(--c-primary);border-color:#BFD6EC}
.btn--ghost:hover{background:var(--c-primary-light);color:var(--c-primary-dark);transform:translateY(-1px)}
.btn--ghost:active{transform:translateY(1px)}
.btn--sm{height:38px;padding:0 18px;font-size:14px}
.btn--block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none!important}

/* ---------- badges ---------- */
.badge{display:inline-flex;align-items:center;gap:5px;height:24px;padding:0 11px;border-radius:var(--r-pill);font-size:12px;font-weight:500;line-height:1.2;background:var(--c-primary-light);color:var(--c-primary);white-space:nowrap}
.badge--accent{background:var(--c-accent-light);color:#B9631A}
.badge--success{background:#E7F6F0;color:var(--c-success)}
.meta-time{font-size:13px;color:var(--c-text-3)}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:200;background:#fff;border-bottom:1px solid var(--c-border)}
.nav-top__inner{display:flex;align-items:center;gap:24px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand__mark{width:36px;height:36px;border-radius:11px;background:linear-gradient(160deg,#2270B8,#13497F);color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0}
.brand__text{font-size:18px;font-weight:700;color:var(--c-text);letter-spacing:.01em;line-height:1.2}
.brand:hover .brand__text{color:var(--c-primary)}
.nav-search{position:relative;display:flex;align-items:center;flex:1;max-width:400px;height:42px;background:#F2F5F9;border:1px solid transparent;border-radius:var(--r-pill);padding:0 16px;transition:border-color .2s ease,box-shadow .2s ease,background .2s ease}
.nav-search i{color:var(--c-text-3);font-size:14px;margin-right:10px}
.nav-search input{flex:1;border:none;background:transparent;outline:none;font-size:14px;min-width:0}
.nav-search input::placeholder{color:var(--c-text-3)}
.nav-search:focus-within{background:#fff;border-color:var(--c-primary);box-shadow:0 0 0 4px rgba(26,92,158,.10)}
.nav-actions{display:flex;align-items:center;gap:12px;margin-left:auto;flex-shrink:0}
.nav-burger{display:none;width:42px;height:42px;border-radius:var(--r-btn);border:1px solid var(--c-border);color:var(--c-primary);align-items:center;justify-content:center;font-size:17px}
.nav-burger:hover{background:var(--c-primary-light)}

.nav-tabs{background:#F8FAFC;border-top:1px solid var(--c-border)}
.nav-tabs__wrap{position:relative}
.nav-tabs__inner{display:flex;align-items:center;gap:8px;height:48px;overflow-x:auto;scroll-snap-type:x proximity;scrollbar-width:none;-ms-overflow-style:none}
.nav-tabs__inner::-webkit-scrollbar{display:none}
.nav-tabs__wrap::after{content:"";position:absolute;right:0;top:0;bottom:0;width:48px;background:linear-gradient(90deg,rgba(248,250,252,0),#F8FAFC);pointer-events:none}
.nav-tab{flex:0 0 auto;scroll-snap-align:start;display:inline-flex;align-items:center;height:34px;padding:0 18px;border-radius:var(--r-pill);font-size:14.5px;font-weight:500;color:var(--c-text-2);transition:background .2s ease,color .2s ease}
.nav-tab:hover{background:var(--c-primary-light);color:var(--c-primary-dark)}
.nav-tab.is-active{background:var(--c-primary);color:#fff;font-weight:600}
.nav-tab.is-active:hover{background:var(--c-primary-dark);color:#fff}

.search-overlay{display:none;position:fixed;inset:0 0 auto 0;z-index:300;background:#fff;border-bottom:1px solid var(--c-border);padding:12px 0;box-shadow:var(--sh-2)}
.search-overlay.is-open{display:block}
.search-overlay__inner{display:flex;align-items:center;gap:10px}
.search-overlay input{flex:1;height:44px;border:1px solid var(--c-border);border-radius:var(--r-btn);padding:0 14px;outline:none;min-width:0}
.search-overlay input:focus{border-color:var(--c-primary);box-shadow:0 0 0 4px rgba(26,92,158,.1)}
.search-overlay__close{width:44px;height:44px;border-radius:var(--r-btn);border:1px solid var(--c-border);color:var(--c-text-2);display:flex;align-items:center;justify-content:center}

.mobile-drawer{display:none;position:fixed;inset:0;z-index:400;background:rgba(19,35,55,.45)}
.mobile-drawer.is-open{display:block}
.mobile-drawer__panel{width:min(84vw,340px);height:100%;background:#fff;padding:20px;display:flex;flex-direction:column;gap:20px;box-shadow:var(--sh-2);overflow-y:auto}
.mobile-drawer__head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--c-border)}
.mobile-drawer__close{width:40px;height:40px;border-radius:var(--r-btn);border:1px solid var(--c-border);color:var(--c-text-2);display:flex;align-items:center;justify-content:center}
.mobile-drawer__nav{display:flex;flex-direction:column;gap:6px}
.mobile-drawer__nav a{padding:12px 14px;border-radius:var(--r-btn);font-size:15px;font-weight:500;color:var(--c-text-2)}
.mobile-drawer__nav a:hover,.mobile-drawer__nav a.is-active{background:var(--c-primary-light);color:var(--c-primary-dark)}

/* ---------- hero ---------- */
.hero{position:relative;background:#fff;border-bottom:1px solid var(--c-border);overflow:hidden}
.hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:8%;background:linear-gradient(180deg,rgba(246,248,251,0),#F6F8FB);pointer-events:none;z-index:1}
.hero__inner{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;min-height:min(88vh,760px);padding:64px 0}
.hero__eyebrow{display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;border-radius:var(--r-pill);background:var(--c-accent-light);color:#B9631A;font-size:13px;font-weight:600;margin-bottom:20px}
.hero h1{margin-bottom:18px}
.hero h1 em{font-style:normal;color:var(--c-primary)}
.hero__sub{font-size:17px;line-height:1.7;color:var(--c-text-2);max-width:560px;margin-bottom:30px}
.hero__cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:32px}
.hero__trust{display:flex;gap:28px;flex-wrap:wrap;padding-top:24px;border-top:1px solid var(--c-border)}
.hero__trust li{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--c-text-2)}
.hero__trust i{color:var(--c-success);font-size:14px}
.hero__visual{position:relative}
.hero__visual img{width:100%;height:420px;object-fit:cover;border-radius:18px;box-shadow:var(--sh-2)}
.hero__stat{position:absolute;left:-18px;bottom:26px;background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);box-shadow:var(--sh-2);padding:16px 20px;display:flex;flex-direction:column;gap:2px;max-width:220px}
.hero__stat-num{font-size:26px;font-weight:700;color:var(--c-primary);line-height:1.2}
.hero__stat-txt{font-size:13px;color:var(--c-text-2);line-height:1.5}

/* ---------- value strip ---------- */
.value-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap)}
.value-item{background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);padding:26px 24px;box-shadow:var(--sh-1);transition:transform .2s ease,box-shadow .2s ease}
.value-item:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.value-item__icon{width:44px;height:44px;border-radius:12px;background:var(--c-primary-light);color:var(--c-primary);display:flex;align-items:center;justify-content:center;font-size:18px;margin-bottom:16px}
.value-item h3{font-size:17px;margin-bottom:8px}
.value-item p{font-size:14px;color:var(--c-text-2);line-height:1.7}

/* ---------- feature grid ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:var(--gap)}
.feature-card{background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);padding:28px;box-shadow:var(--sh-1);display:flex;flex-direction:column;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.feature-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#CFDFF1}
.feature-card__icon{width:46px;height:46px;border-radius:13px;background:var(--c-primary-light);color:var(--c-primary);display:flex;align-items:center;justify-content:center;font-size:19px;margin-bottom:18px}
.feature-card h3{font-size:19px;margin-bottom:10px}
.feature-card p{font-size:14.5px;color:var(--c-text-2);line-height:1.75;margin-bottom:16px}
.feature-card .text-link{margin-top:auto}
.feature-card--main{grid-column:span 6;background:linear-gradient(180deg,#FFFFFF,#F7FAFE);border-color:#CFDFF1}
.feature-card--main h3{font-size:22px}
.feature-card--w3{grid-column:span 3}
.feature-card--w4{grid-column:span 4}
.step-list{display:flex;flex-direction:column;gap:12px;margin-bottom:18px}
.step-list li{display:flex;gap:12px;font-size:14.5px;color:var(--c-text-2);line-height:1.7}
.step-list .step-no{flex:0 0 24px;height:24px;border-radius:8px;background:var(--c-primary);color:#fff;font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;margin-top:2px}

/* ---------- scenes ---------- */
.scene-row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.scene-row + .scene-row{margin-top:80px}
.scene-row--rev .scene-media{order:2}
.scene-media{position:relative}
.scene-media img{width:100%;height:340px;object-fit:cover;border-radius:18px;box-shadow:var(--sh-1)}
.scene-tag{position:absolute;top:16px;left:16px}
.scene-body h3{font-size:24px;margin-bottom:14px}
.scene-body > p{color:var(--c-text-2);font-size:15.5px;margin-bottom:20px}
.scene-points{display:flex;flex-direction:column;gap:12px;padding-top:20px;border-top:1px solid var(--c-border)}
.scene-points li{display:flex;gap:10px;font-size:15px;color:var(--c-text-2);line-height:1.7}
.scene-points i{color:var(--c-primary);font-size:14px;margin-top:6px}

/* ---------- cases ---------- */
.case-scroller{display:flex;gap:var(--gap);overflow-x:auto;padding:6px 24px 24px;scroll-snap-type:x mandatory;scrollbar-width:none;-ms-overflow-style:none;margin:0 -24px}
.case-scroller::-webkit-scrollbar{display:none}
.case-card{flex:0 0 calc((100% - var(--gap) * 1.5) / 2.5);min-width:280px;scroll-snap-align:start;background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);padding:28px;box-shadow:var(--sh-1);transition:transform .2s ease,box-shadow .2s ease}
.case-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.case-card__num{font-size:38px;font-weight:700;color:var(--c-primary);line-height:1.1;letter-spacing:-.01em}
.case-card__num small{font-size:16px;font-weight:600;margin-left:4px;color:var(--c-text-2)}
.case-card p{font-size:14.5px;color:var(--c-text-2);margin:14px 0 18px;line-height:1.7;min-height:52px}
.case-card__tags{display:flex;gap:8px;flex-wrap:wrap}

/* ---------- pricing ---------- */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap);align-items:stretch}
.price-card{position:relative;background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);padding:32px 28px;box-shadow:var(--sh-1);display:flex;flex-direction:column;transition:transform .2s ease,box-shadow .2s ease}
.price-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.price-card--hot{border:2px solid var(--c-primary);box-shadow:0 4px 10px rgba(21,45,73,.08),0 16px 40px rgba(21,45,73,.12)}
.price-card__flag{position:absolute;top:-13px;right:24px;height:26px;padding:0 14px;border-radius:var(--r-pill);background:var(--c-accent);color:#fff;font-size:12px;font-weight:600;display:flex;align-items:center}
.price-card__name{font-size:17px;font-weight:600;margin-bottom:6px}
.price-card__price{font-size:32px;font-weight:700;color:var(--c-primary);line-height:1.2;margin-bottom:4px}
.price-card__price small{font-size:14px;font-weight:500;color:var(--c-text-3);margin-left:4px}
.price-card__note{font-size:13px;color:var(--c-text-3);margin-bottom:22px}
.price-card ul{display:flex;flex-direction:column;gap:12px;padding:22px 0;border-top:1px solid var(--c-border);margin-bottom:24px;flex:1}
.price-card li{display:flex;gap:10px;font-size:14.5px;color:var(--c-text-2);line-height:1.65}
.price-card li i{color:var(--c-success);font-size:13px;margin-top:6px;flex-shrink:0}
.price-foot{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:28px;font-size:13.5px;color:var(--c-text-3)}

/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap)}
.news-card{background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);display:flex;flex-direction:column;transition:transform .2s ease,box-shadow .2s ease}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.news-card__cover{display:block;aspect-ratio:16/9;overflow:hidden;background:var(--c-primary-light)}
.news-card__cover img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.news-card:hover .news-card__cover img{transform:scale(1.03)}
.news-card__body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.news-card__meta{display:flex;align-items:center;gap:12px}
.news-card__title{font-size:17px;line-height:1.45;font-weight:600;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card__title a{color:var(--c-text)}
.news-card__title a:hover{color:var(--c-primary)}
.news-card__sum{font-size:14px;color:var(--c-text-2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card .text-link{margin-top:auto;font-size:14px}
.empty-state{grid-column:1/-1;background:#fff;border:1px dashed #CFDFF1;border-radius:var(--r-card);padding:56px 24px;display:flex;flex-direction:column;align-items:center;gap:14px;text-align:center}
.empty-state i{font-size:30px;color:var(--c-text-3)}
.empty-state p{font-size:15px;color:var(--c-text-2)}

/* ---------- faq ---------- */
.faq-columns{display:grid;grid-template-columns:1fr 1fr;gap:0 var(--gap);align-items:start}
.faq-col{display:flex;flex-direction:column}
.faq-item{border-bottom:1px solid var(--c-border);background:transparent}
.faq-item:first-child{border-top:1px solid var(--c-border)}
.faq-q{width:100%;display:flex;align-items:flex-start;justify-content:space-between;gap:16px;text-align:left;padding:22px 4px;font-size:16px;font-weight:600;color:var(--c-text);line-height:1.6;transition:color .2s ease}
.faq-q:hover{color:var(--c-primary)}
.faq-q i{flex-shrink:0;margin-top:5px;font-size:14px;color:var(--c-accent);transition:transform .2s ease}
.faq-item.is-open .faq-q{color:var(--c-primary)}
.faq-item.is-open .faq-q i{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease}
.faq-a p{padding:0 4px 22px;font-size:14.5px;color:var(--c-text-2);line-height:1.8}

/* ---------- cta + form ---------- */
.cta-band{background:#fff;border-top:1px solid var(--c-border)}
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.cta-copy h2{margin-bottom:16px}
.cta-copy p{color:var(--c-text-2);font-size:15.5px;margin-bottom:24px;max-width:520px}
.cta-list{display:flex;flex-direction:column;gap:12px}
.cta-list li{display:flex;gap:10px;font-size:14.5px;color:var(--c-text-2)}
.cta-list i{color:var(--c-primary);margin-top:6px;font-size:13px}
.form-card{background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);padding:28px;box-shadow:var(--sh-1)}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:8px;color:var(--c-text)}
.field label .req{color:var(--c-error);margin-left:2px}
.field input,.field select,.field textarea{width:100%;height:44px;border:1px solid var(--c-border);border-radius:var(--r-btn);padding:0 14px;background:#fff;outline:none;transition:border-color .2s ease,box-shadow .2s ease;font-size:15px}
.field textarea{height:auto;min-height:96px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--c-primary);box-shadow:0 0 0 4px rgba(26,92,158,.1)}
.field.has-error input,.field.has-error select,.field.has-error textarea{border-color:var(--c-error)}
.field__err{display:none;font-size:12px;color:var(--c-error);margin-top:6px}
.field.has-error .field__err{display:block}
.form-alert{display:none;border-radius:var(--r-btn);padding:12px 16px;font-size:14px;margin-bottom:18px;line-height:1.6}
.form-alert.is-ok{display:block;background:#E7F6F0;color:#146E52;border:1px solid #BEe5d8}
.form-note{font-size:12.5px;color:var(--c-text-3);margin-top:14px;line-height:1.6}

/* ---------- footer ---------- */
.site-footer{background:#fff;border-top:1px solid var(--c-border);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:44px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{font-size:14px;color:var(--c-text-2);line-height:1.8;max-width:340px;margin-bottom:14px}
.footer-brand .footer-domain{font-size:13px;color:var(--c-text-3)}
.footer-col h4{font-size:15px;font-weight:600;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a,.footer-col span{font-size:14px;color:var(--c-text-2)}
.footer-col a:hover{color:var(--c-primary)}
.footer-bottom{border-top:1px solid var(--c-border);padding:20px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.footer-bottom p{font-size:13px;color:var(--c-text-3);line-height:1.8}

.back-top{position:fixed;right:22px;bottom:26px;width:44px;height:44px;border-radius:50%;background:#fff;border:1px solid var(--c-border);box-shadow:var(--sh-2);color:var(--c-primary);display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:opacity .2s ease,visibility .2s ease,transform .2s ease;z-index:150}
.back-top.is-show{opacity:1;visibility:visible}
.back-top:hover{transform:translateY(-2px)}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  :root{--sec-py:88px}
  .hero__inner{gap:40px}
  .hero__visual img{height:380px}
}
@media (max-width:991px){
  :root{--sec-py:76px}
  .nav-search{max-width:280px}
  .hero__inner{grid-template-columns:1fr;min-height:auto;padding:48px 0 64px;gap:40px}
  .hero__visual img{height:320px}
  .hero__stat{left:12px;bottom:14px}
  .feature-card--main{grid-column:span 12}
  .feature-card--w3{grid-column:span 6}
  .feature-card--w4{grid-column:span 6}
  .scene-row{grid-template-columns:1fr;gap:28px}
  .scene-row--rev .scene-media{order:0}
  .case-card{flex:0 0 calc((100% - var(--gap)) / 2)}
  .price-grid{grid-template-columns:1fr;max-width:520px;margin:0 auto}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .cta-grid{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  :root{--sec-py:60px;--gap:18px}
  .container{padding:0 20px}
  .nav-top__inner{height:60px;gap:12px}
  .brand__text{font-size:16px}
  .nav-search{display:none}
  .nav-actions .btn--primary{display:none}
  .nav-burger{display:flex}
  .nav-tabs__inner{height:46px}
  .value-strip{grid-template-columns:repeat(2,1fr)}
  .feature-card--w3,.feature-card--w4{grid-column:span 12}
  .hero__cta .btn{width:100%}
  .hero__trust{gap:14px 22px}
  .hero__visual img{height:240px}
  .scene-media img{height:240px}
  .case-scroller{padding-left:20px;padding-right:20px;margin:0 -20px}
  .case-card{flex:0 0 84%}
  .news-grid{grid-template-columns:1fr}
  .faq-columns{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px}
  .form-card{padding:22px}
  .btn--submit{width:100%}
}
@media (max-width:575px){
  .value-strip{grid-template-columns:1fr}
  .hero__stat{position:static;margin-top:16px;box-shadow:var(--sh-1);max-width:none}
  .hero__visual img{height:210px}
  .case-card{flex:0 0 90%}
}

/* roulang page: article */
:root{
  --c-primary:#1A5C9E;
  --c-primary-dark:#13497F;
  --c-primary-light:#EAF2FB;
  --c-accent:#F2842B;
  --c-accent-light:#FDF1E4;
  --c-success:#1F9D74;
  --c-danger:#D64545;
  --c-warning:#C98A16;
  --c-bg:#F6F8FB;
  --c-surface:#FFFFFF;
  --c-line:#E4EAF2;
  --c-text:#1F2937;
  --c-muted:#5B6B7C;
  --c-disabled:#9AA7B4;
  --r-card:14px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(21,45,73,.06),0 8px 24px rgba(21,45,73,.06);
  --sh-2:0 4px 10px rgba(21,45,73,.08),0 16px 40px rgba(21,45,73,.12);
  --wrap:1200px;
}
*,*::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:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
}
img{max-width:100%;display:block;}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--c-primary-dark);}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;color:var(--c-text);}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font:inherit;color:inherit;}
input{font:inherit;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;}
.container{max-width:var(--wrap);margin:0 auto;padding:0 24px;width:100%;}
.section{padding:88px 0;}
.section--tight{padding:64px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;}
.section-head h2{font-size:clamp(24px,2.6vw,32px);}
.section-head p{color:var(--c-muted);font-size:14px;margin-top:8px;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:500;letter-spacing:.04em;color:var(--c-primary);background:var(--c-primary-light);border-radius:var(--r-pill);padding:5px 12px;margin-bottom:14px;}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-size:14px;font-weight:600;}
.text-link i{font-size:12px;transition:transform .2s ease;}
.text-link:hover i{transform:translateX(2px);}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .18s ease,box-shadow .2s ease;
  white-space:nowrap;
}
.btn--primary{color:#fff;background:var(--c-primary);background-image:linear-gradient(180deg,rgba(255,255,255,.08),rgba(255,255,255,0));border-color:var(--c-primary);}
.btn--primary:hover{background-color:var(--c-primary-dark);border-color:var(--c-primary-dark);color:#fff;transform:translateY(-1px);box-shadow:0 4px 10px rgba(21,45,73,.12);}
.btn--primary:active{transform:translateY(0);}
.btn--ghost{background:#fff;color:var(--c-primary);border-color:var(--c-primary);}
.btn--ghost:hover{background:var(--c-primary-light);color:var(--c-primary-dark);transform:translateY(-1px);}
.btn--sm{height:38px;padding:0 16px;font-size:14px;}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none;}

/* 顶部导航 */
.site-header{position:relative;z-index:60;background:#fff;border-bottom:1px solid var(--c-line);}
.nav-top{border-bottom:1px solid var(--c-line);}
.nav-top__inner{display:flex;align-items:center;gap:24px;height:70px;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--c-text);font-weight:700;font-size:17px;}
.brand:hover{color:var(--c-primary-dark);}
.brand__mark{
  width:36px;height:36px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  background:var(--c-primary);color:#fff;font-size:16px;flex:0 0 36px;
}
.brand__text{letter-spacing:.01em;line-height:1.2;}
.nav-search{
  flex:1 1 auto;max-width:400px;position:relative;display:flex;align-items:center;
  background:#F8FAFC;border:1px solid var(--c-line);border-radius:var(--r-pill);
  height:42px;padding:0 16px;color:var(--c-disabled);transition:border-color .2s ease,box-shadow .2s ease,background-color .2s ease;
}
.nav-search i{font-size:14px;color:var(--c-muted);}
.nav-search input{
  flex:1;border:0;background:transparent;outline:none;height:100%;padding:0 10px;
  color:var(--c-text);font-size:14px;
}
.nav-search input::placeholder{color:var(--c-disabled);}
.nav-search:focus-within{border-color:var(--c-primary);background:#fff;box-shadow:0 0 0 3px rgba(26,92,158,.12);}
.nav-actions{display:flex;align-items:center;gap:12px;margin-left:auto;}
.nav-burger{
  display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--c-line);
  background:#fff;color:var(--c-text);align-items:center;justify-content:center;cursor:pointer;
  transition:border-color .2s ease,color .2s ease;
}
.nav-burger:hover{border-color:var(--c-primary);color:var(--c-primary);}
.nav-tabs{background:#F8FAFC;}
.nav-tabs__wrap{position:relative;}
.nav-tabs__wrap::after{
  content:"";position:absolute;right:0;top:0;bottom:0;width:48px;pointer-events:none;
  background:linear-gradient(90deg,rgba(248,250,252,0),#F8FAFC);
}
.nav-tabs__inner{
  display:flex;align-items:center;gap:8px;height:48px;overflow-x:auto;scroll-snap-type:x proximity;
  scrollbar-width:none;-ms-overflow-style:none;
}
.nav-tabs__inner::-webkit-scrollbar{display:none;}
.nav-tab{
  scroll-snap-align:start;flex:0 0 auto;padding:8px 16px;border-radius:var(--r-pill);
  font-size:14px;font-weight:500;color:var(--c-muted);background:transparent;transition:background-color .2s ease,color .2s ease;
}
.nav-tab:hover{color:var(--c-primary);background:var(--c-primary-light);}
.nav-tab.is-active{background:var(--c-primary);color:#fff;}
.nav-tab.is-active:hover{background:var(--c-primary-dark);color:#fff;}

/* 面包屑 */
.crumb-bar{background:#fff;border-bottom:1px solid var(--c-line);}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-muted);padding:14px 0;flex-wrap:wrap;}
.crumb a{color:var(--c-muted);}
.crumb a:hover{color:var(--c-primary);}
.crumb .sep{color:var(--c-disabled);}
.crumb .current{color:var(--c-muted);max-width:360px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* 文章头 */
.article-hero{background:#fff;padding:40px 0 36px;border-bottom:1px solid var(--c-line);}
.article-hero h1{font-size:clamp(30px,4vw,44px);line-height:1.25;font-weight:700;max-width:900px;}
.article-meta{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-top:20px;font-size:14px;color:var(--c-muted);}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:7px;}
.article-meta i{color:var(--c-primary);font-size:13px;}
.meta-badge{
  display:inline-flex;align-items:center;gap:6px;background:var(--c-primary-light);color:var(--c-primary);
  border-radius:var(--r-pill);padding:5px 12px;font-size:12px;font-weight:500;
}
.share-group{display:flex;align-items:center;gap:8px;margin-left:auto;}
.share-group span{font-size:13px;color:var(--c-muted);}
.share-btn{
  width:34px;height:34px;border-radius:var(--r-pill);display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--c-line);background:#fff;color:var(--c-muted);cursor:pointer;transition:all .2s ease;
}
.share-btn:hover{color:var(--c-primary);border-color:var(--c-primary);background:var(--c-primary-light);}

/* 布局 */
.article-shell{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:32px;align-items:start;padding:56px 0 88px;}
.article-card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-1);
  padding:40px 44px;
}
.article-card--empty{text-align:center;padding:64px 32px;}
.empty-icon{
  width:64px;height:64px;border-radius:var(--r-pill);background:var(--c-primary-light);color:var(--c-primary);
  display:inline-flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:18px;
}
.empty-title{font-size:18px;font-weight:600;margin-bottom:8px;}
.empty-desc{color:var(--c-muted);font-size:14px;margin-bottom:22px;}
.article-body{max-width:800px;font-size:16px;line-height:1.85;color:var(--c-text);}
.article-body p{margin:0 0 20px;}
.article-body h2{font-size:clamp(21px,2.2vw,26px);margin:40px 0 16px;padding-left:14px;border-left:4px solid var(--c-primary);line-height:1.4;}
.article-body h3{font-size:19px;margin:30px 0 12px;}
.article-body h4{font-size:17px;margin:24px 0 10px;}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:0;}
.article-body ul li,.article-body ol li{position:relative;padding-left:22px;margin-bottom:10px;color:var(--c-text);}
.article-body ul li::before{
  content:"";position:absolute;left:4px;top:12px;width:7px;height:7px;border-radius:50%;background:var(--c-accent);
}
.article-body ol{counter-reset:li;}
.article-body ol li{counter-increment:li;}
.article-body ol li::before{
  content:counter(li);position:absolute;left:0;top:2px;width:20px;height:20px;border-radius:50%;
  background:var(--c-primary-light);color:var(--c-primary);font-size:12px;font-weight:600;
  display:flex;align-items:center;justify-content:center;
}
.article-body img{border-radius:12px;margin:24px 0;border:1px solid var(--c-line);}
.article-body blockquote{
  margin:24px 0;padding:18px 22px;background:var(--c-primary-light);border-left:4px solid var(--c-primary);
  border-radius:0 12px 12px 0;color:var(--c-primary-dark);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;border:1px solid var(--c-line);border-radius:12px;overflow:hidden;}
.article-body th,.article-body td{padding:12px 14px;border-bottom:1px solid var(--c-line);text-align:left;}
.article-body th{background:#F8FAFC;font-weight:600;}
.article-body tr:last-child td{border-bottom:0;}
.article-body code{background:#F1F5F9;border-radius:6px;padding:2px 6px;font-size:14px;}
.article-body a{border-bottom:1px solid rgba(26,92,158,.35);}
.article-body a:hover{border-bottom-color:var(--c-primary-dark);}

/* 侧栏 */
.side-col{position:sticky;top:24px;display:grid;gap:20px;}
.side-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-1);padding:22px;}
.side-card h3{font-size:15px;display:flex;align-items:center;gap:8px;margin-bottom:16px;}
.side-card h3 i{color:var(--c-primary);font-size:14px;}
.toc-list{display:grid;gap:2px;max-height:340px;overflow:auto;}
.toc-list a{
  display:block;font-size:14px;color:var(--c-muted);padding:7px 10px;border-radius:8px;border-left:2px solid transparent;
  transition:all .2s ease;line-height:1.5;
}
.toc-list a:hover{background:#F8FAFC;color:var(--c-primary);}
.toc-list a.is-current{color:var(--c-primary);background:var(--c-primary-light);border-left-color:var(--c-primary);font-weight:600;}
.toc-list a.lvl-3{padding-left:22px;font-size:13px;}
.toc-empty{font-size:13px;color:var(--c-muted);}
.side-reco{display:grid;gap:14px;}
.side-reco a{display:grid;grid-template-columns:64px 1fr;gap:12px;align-items:center;}
.side-reco .thumb{width:64px;height:44px;border-radius:8px;overflow:hidden;border:1px solid var(--c-line);}
.side-reco .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.side-reco a:hover .thumb img{transform:scale(1.06);}
.side-reco strong{font-size:13.5px;font-weight:600;color:var(--c-text);display:block;line-height:1.5;transition:color .2s ease;}
.side-reco a:hover strong{color:var(--c-primary);}

/* 移动端折叠目录 */
.mobile-toc{display:none;margin-bottom:20px;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;}
.mobile-toc summary{
  cursor:pointer;list-style:none;padding:14px 18px;font-weight:600;font-size:14px;
  display:flex;align-items:center;justify-content:space-between;gap:10px;
}
.mobile-toc summary::-webkit-details-marker{display:none;}
.mobile-toc summary i{color:var(--c-primary);transition:transform .2s ease;}
.mobile-toc[open] summary i{transform:rotate(180deg);}
.mobile-toc .toc-list{padding:0 12px 14px;}

/* 文末 */
.article-foot{margin-top:36px;padding-top:26px;border-top:1px solid var(--c-line);display:grid;gap:24px;}
.tag-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.tag-row span{font-size:13px;color:var(--c-muted);}
.tag{
  display:inline-flex;align-items:center;padding:6px 14px;border-radius:var(--r-pill);
  background:var(--c-primary-light);color:var(--c-primary);font-size:12px;font-weight:500;
  transition:background-color .2s ease,color .2s ease;
}
.tag:hover{background:var(--c-primary);color:#fff;}
.tag--accent{background:var(--c-accent-light);color:#B85F14;}
.tag--accent:hover{background:var(--c-accent);color:#fff;}
.pager{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.pager-item{
  border:1px solid var(--c-line);border-radius:12px;padding:16px 18px;background:#FBFDFF;
  transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.pager-item:hover{border-color:var(--c-primary);box-shadow:var(--sh-1);transform:translateY(-2px);}
.pager-item em{font-style:normal;font-size:12px;color:var(--c-muted);display:block;margin-bottom:6px;}
.pager-item strong{font-size:14.5px;font-weight:600;color:var(--c-text);display:block;line-height:1.55;}
.pager-item:hover strong{color:var(--c-primary);}

/* 相关推荐 */
.reco-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:26px;}
.card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-1);
  overflow:hidden;display:flex;flex-direction:column;transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D6E2F0;}
.card__cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--c-primary-light);}
.card__cover img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.card:hover .card__cover img{transform:scale(1.03);}
.card__badge{
  position:absolute;left:12px;top:12px;background:rgba(255,255,255,.94);color:var(--c-primary);
  border-radius:var(--r-pill);padding:4px 10px;font-size:12px;font-weight:500;
}
.card__body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card__body time{font-size:12.5px;color:var(--c-muted);}
.card__body h3{font-size:17px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card__body p{font-size:14px;color:var(--c-muted);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card__body .text-link{margin-top:auto;}

/* CTA */
.cta-band{
  background:#fff;border:1px solid var(--c-line);border-radius:18px;box-shadow:var(--sh-1);
  padding:40px 44px;display:grid;grid-template-columns:1.2fr .8fr;gap:36px;align-items:center;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;bottom:-70px;width:240px;height:240px;border-radius:50%;
  background:var(--c-primary-light);opacity:.7;pointer-events:none;
}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:12px;}
.cta-band p{color:var(--c-muted);font-size:15px;max-width:560px;}
.cta-points{display:flex;gap:20px;flex-wrap:wrap;margin-top:20px;font-size:14px;color:var(--c-text);}
.cta-points span{display:inline-flex;align-items:center;gap:7px;}
.cta-points i{color:var(--c-success);font-size:13px;}
.cta-actions{position:relative;z-index:1;display:flex;flex-direction:column;gap:12px;}
.cta-actions .btn{width:100%;}
.cta-note{font-size:12.5px;color:var(--c-muted);text-align:center;}

/* 页脚 */
.site-footer{background:#fff;border-top:1px solid var(--c-line);padding:56px 0 24px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;}
.footer-brand p{font-size:14px;color:var(--c-muted);margin-top:14px;max-width:340px;}
.footer-brand .brand{margin-bottom:4px;}
.footer-domain{font-size:13px !important;color:var(--c-disabled) !important;}
.footer-col h4{font-size:15px;margin-bottom:16px;}
.footer-col ul{display:grid;gap:10px;}
.footer-col li{font-size:14px;color:var(--c-muted);}
.footer-col a{color:var(--c-muted);}
.footer-col a:hover{color:var(--c-primary);}
.footer-bottom{
  margin-top:36px;padding-top:20px;border-top:1px solid var(--c-line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom p{font-size:13px;color:var(--c-disabled);}

/* 加载骨架 */
.skeleton{background:linear-gradient(90deg,#EEF2F7 25%,#F7FAFD 37%,#EEF2F7 63%);background-size:400% 100%;animation:shimmer 1.4s ease infinite;border-radius:8px;}
@keyframes shimmer{0%{background-position:100% 50%;}100%{background-position:0 50%;}}

/* 响应式 */
@media (max-width:1199px){
  .article-shell{grid-template-columns:minmax(0,1fr) 290px;gap:26px;}
}
@media (max-width:991px){
  .article-shell{grid-template-columns:minmax(0,1fr);padding:40px 0 64px;}
  .side-col{position:static;}
  .mobile-toc{display:block;}
  .article-card{padding:32px 26px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .cta-band{grid-template-columns:1fr;padding:32px 26px;}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  .section{padding:56px 0;}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px;}
  .nav-top__inner{height:62px;gap:12px;}
  .nav-search{display:none;}
  .nav-top.is-search-open .nav-search{
    display:flex;position:absolute;left:20px;right:20px;top:70px;max-width:none;z-index:70;background:#fff;
  }
  .nav-burger{display:inline-flex;}
  .nav-actions .btn--sm{height:36px;padding:0 14px;font-size:13px;}
  .nav-tabs__inner{height:46px;}
  .nav-tabs.is-mobile-open .nav-tabs__inner{
    flex-direction:column;align-items:stretch;height:auto;overflow:visible;padding:10px 0 14px;gap:6px;
  }
  .nav-tabs.is-mobile-open .nav-tab{padding:11px 14px;border-radius:10px;}
  .nav-tabs__wrap::after{display:none;}
  .article-hero{padding:28px 0 26px;}
  .article-meta{gap:12px;font-size:13px;}
  .share-group{margin-left:0;width:100%;}
  .article-card{padding:24px 20px;}
  .article-body{font-size:15.5px;}
  .pager{grid-template-columns:1fr;}
  .reco-grid{grid-template-columns:1fr;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .btn--block-mobile{width:100%;}
}
@media (max-width:575px){
  .article-hero h1{font-size:26px;}
  .card__body{padding:16px 18px 20px;}
  .side-card{padding:18px;}
}

/* roulang page: category1 */
:root{
  --c-primary:#1A5C9E;
  --c-primary-d:#13497F;
  --c-primary-l:#EAF2FB;
  --c-accent:#F2842B;
  --c-accent-l:#FDF1E4;
  --c-success:#1F9D74;
  --c-error:#D64545;
  --c-warn:#C98A16;
  --c-bg:#F6F8FB;
  --c-surface:#FFFFFF;
  --c-line:#E4EAF2;
  --c-text:#1F2937;
  --c-text-2:#5B6B7C;
  --c-text-3:#9AA7B4;
  --r-card:14px;
  --r-btn:10px;
  --r-pill:999px;
  --r-input:10px;
  --r-img:12px;
  --sh-1:0 1px 2px rgba(21,45,73,.06),0 8px 24px rgba(21,45,73,.06);
  --sh-2:0 4px 10px rgba(21,45,73,.08),0 16px 40px rgba(21,45,73,.12);
  --w-container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--c-text);
  background:var(--c-bg);
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:var(--c-primary);text-decoration:none;transition:color .18s ease,opacity .18s ease}
a:hover{color:var(--c-primary-d)}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--c-text)}
h1{font-size:clamp(30px,4vw,44px);line-height:1.25;font-weight:700}
h2{font-size:clamp(24px,2.6vw,32px);line-height:1.3}
h3{font-size:20px;line-height:1.4;font-weight:600}
h4{font-size:16px;line-height:1.4;font-weight:600}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font:inherit;cursor:pointer}
input{font:inherit}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
.container{width:100%;max-width:var(--w-container);margin:0 auto;padding:0 24px}

/* ============ 顶部导航 ============ */
.site-header{position:sticky;top:0;z-index:60;background:var(--c-surface);box-shadow:0 1px 0 var(--c-line)}
.nav-top{border-bottom:1px solid var(--c-line);background:var(--c-surface)}
.nav-top__inner{position:relative;display:flex;align-items:center;gap:20px;height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand__mark{
  width:34px;height:34px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  background:var(--c-primary);color:#fff;font-size:16px;flex-shrink:0;
}
.brand__text{font-size:17px;font-weight:700;color:var(--c-text);letter-spacing:.2px;white-space:nowrap}
.brand:hover .brand__text{color:var(--c-primary)}
.nav-search{
  flex:1;max-width:400px;display:flex;align-items:center;gap:10px;
  height:42px;padding:0 16px;border:1px solid var(--c-line);border-radius:var(--r-pill);
  background:#F8FAFC;color:var(--c-text-3);transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
.nav-search:focus-within{border-color:var(--c-primary);background:#fff;box-shadow:0 0 0 4px rgba(26,92,158,.10)}
.nav-search i{font-size:14px}
.nav-search input{flex:1;border:0;background:transparent;outline:none;color:var(--c-text);font-size:14px}
.nav-search input::placeholder{color:var(--c-text-3)}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.nav-burger{
  width:40px;height:40px;border-radius:var(--r-btn);border:1px solid var(--c-line);background:#fff;
  color:var(--c-text-2);display:inline-flex;align-items:center;justify-content:center;transition:all .18s ease;
}
.nav-burger:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-l)}
.nav-icon-cta{
  display:none;width:40px;height:40px;border-radius:var(--r-btn);background:var(--c-primary);color:#fff;
  align-items:center;justify-content:center;font-size:15px;
}
.nav-icon-cta:hover{background:var(--c-primary-d);color:#fff}

.nav-tabs{background:#F8FAFC;border-bottom:1px solid var(--c-line)}
.nav-tabs__wrap{position:relative}
.nav-tabs__wrap::after{
  content:"";position:absolute;top:0;right:0;bottom:0;width:48px;pointer-events:none;
  background:linear-gradient(90deg,rgba(248,250,252,0),#F8FAFC 70%);
}
.nav-tabs__inner{
  display:flex;align-items:center;gap:8px;height:48px;overflow-x:auto;scroll-snap-type:x proximity;
  -ms-overflow-style:none;scrollbar-width:none;
}
.nav-tabs__inner::-webkit-scrollbar{display:none}
.nav-tab{
  flex:0 0 auto;scroll-snap-align:start;padding:7px 16px;border-radius:var(--r-pill);
  font-size:14px;font-weight:500;color:var(--c-text-2);white-space:nowrap;transition:all .18s ease;
}
.nav-tab:hover{background:var(--c-primary-l);color:var(--c-primary)}
.nav-tab.is-active{background:var(--c-primary);color:#fff}
.nav-tab.is-active:hover{background:var(--c-primary-d);color:#fff}

.nav-drawer{display:none;background:#fff;border-bottom:1px solid var(--c-line);overflow:hidden;max-height:0;transition:max-height .28s ease}
.nav-drawer.is-open{max-height:360px}
.nav-drawer ul{padding:8px 24px 16px}
.nav-drawer li+li{border-top:1px solid var(--c-line)}
.nav-drawer a{display:block;padding:13px 2px;font-size:15px;color:var(--c-text-2)}
.nav-drawer a:hover{color:var(--c-primary)}
.nav-drawer a.is-active{color:var(--c-primary);font-weight:600}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;transition:all .18s ease;white-space:nowrap;
}
.btn--sm{height:38px;padding:0 16px;font-size:14px}
.btn--primary{background:linear-gradient(180deg,#2069AF,var(--c-primary));color:#fff;border-color:var(--c-primary)}
.btn--primary:hover{background:linear-gradient(180deg,#1A5C9E,var(--c-primary-d));color:#fff;transform:translateY(-1px);box-shadow:var(--sh-1)}
.btn--primary:active{transform:translateY(1px);box-shadow:none}
.btn--ghost{background:#fff;color:var(--c-primary);border-color:var(--c-primary)}
.btn--ghost:hover{background:var(--c-primary-l);color:var(--c-primary-d);transform:translateY(-1px)}
.btn--ghost:active{transform:translateY(1px)}
.btn--light{background:#fff;color:var(--c-primary-d);border-color:#fff}
.btn--light:hover{background:#EAF2FB;color:var(--c-primary-d);transform:translateY(-1px)}
.btn--outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.7)}
.btn--outline-light:hover{background:rgba(255,255,255,.14);color:#fff;transform:translateY(-1px)}
.btn[disabled]{opacity:.4;cursor:not-allowed}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-primary)}
.text-link i{font-size:12px;transition:transform .18s ease}
.text-link:hover i{transform:translateX(2px)}

/* ============ 通用板块 ============ */
.section{padding:88px 0}
.section--tight{padding:44px 0}
.section--alt{background:#fff;border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.section-head{max-width:760px;margin-bottom:40px}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:500;letter-spacing:1px;
  color:var(--c-primary);background:var(--c-primary-l);border-radius:var(--r-pill);padding:5px 12px;margin-bottom:14px;
}
.section-head p{margin-top:12px;color:var(--c-text-2)}
.divider{height:1px;background:var(--c-line);border:0;margin:0}

/* ============ 面包屑 ============ */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-text-2);padding-top:22px}
.breadcrumb a{color:var(--c-text-2)}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb .sep{color:var(--c-text-3)}
.breadcrumb .current{color:var(--c-text-3)}

/* ============ 分类页头 ============ */
.page-hero{
  position:relative;
  background-color:#fff;
  background-image:linear-gradient(180deg,rgba(255,255,255,.55),rgba(246,248,251,.92)),url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--c-line);
  padding-bottom:64px;
}
.page-hero__inner{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;margin-top:26px}
.page-hero h1{margin-bottom:16px}
.page-hero__lead{font-size:16px;color:var(--c-text-2);max-width:560px}
.page-hero__meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.meta-pill{
  display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border-radius:var(--r-pill);
  background:#fff;border:1px solid var(--c-line);font-size:13px;color:var(--c-text-2);box-shadow:var(--sh-1);
}
.meta-pill i{color:var(--c-primary)}
.page-hero__visual{position:relative}
.page-hero__visual img{
  width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-card);border:1px solid var(--c-line);
  box-shadow:var(--sh-2);
}
.icon-matrix{
  position:absolute;right:-8px;bottom:-18px;display:flex;gap:10px;padding:12px;border-radius:var(--r-card);
  background:rgba(255,255,255,.96);border:1px solid var(--c-line);box-shadow:var(--sh-1);
}
.icon-matrix span{
  width:42px;height:42px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
  background:var(--c-primary-l);color:var(--c-primary);font-size:16px;
}
.icon-matrix span:nth-child(2){background:var(--c-accent-l);color:var(--c-accent)}
.icon-matrix span:nth-child(3){background:#E9F6F1;color:var(--c-success)}

/* ============ 指标条 ============ */
.stat-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-1);overflow:hidden}
.stat-strip__item{padding:22px 24px;border-right:1px solid var(--c-line)}
.stat-strip__item:last-child{border-right:0}
.stat-strip__item strong{display:block;font-size:17px;font-weight:700;color:var(--c-primary-d);margin-bottom:4px}
.stat-strip__item span{font-size:13px;color:var(--c-text-2)}

/* ============ 两栏布局 ============ */
.layout-split{display:grid;grid-template-columns:266px 1fr;gap:32px;align-items:start}
.side-toc{position:sticky;top:130px;display:grid;gap:20px}
.side-toc__card{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-1);padding:22px}
.side-toc__card h4{font-size:14px;color:var(--c-text-3);font-weight:500;letter-spacing:.5px;margin-bottom:12px}
.side-toc__list{display:grid;gap:2px}
.side-toc__list a{
  display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:var(--r-btn);
  font-size:14px;color:var(--c-text-2);border-left:2px solid transparent;
}
.side-toc__list a:hover{background:var(--c-primary-l);color:var(--c-primary);border-left-color:var(--c-primary)}
.side-toc__list i{color:var(--c-primary);font-size:13px;width:16px;text-align:center}
.side-toc__note{background:var(--c-primary-l);border:1px solid #D3E3F5;border-radius:var(--r-card);padding:20px}
.side-toc__note h4{color:var(--c-primary-d);margin-bottom:8px}
.side-toc__note p{font-size:13px;color:var(--c-text-2);margin-bottom:14px}

/* ============ 内容卡网格 ============ */
.content-block-head{margin-bottom:24px}
.content-block-head h2{margin-bottom:10px}
.content-block-head p{color:var(--c-text-2);max-width:700px}
.card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-1);
  padding:26px;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;display:flex;flex-direction:column;gap:12px;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D5E1EF}
.card__cover{overflow:hidden;border-radius:var(--r-img);margin:-6px 0 4px}
.card__cover img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .32s ease}
.card:hover .card__cover img{transform:scale(1.03)}
.card__icon{
  width:44px;height:44px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
  background:var(--c-primary-l);color:var(--c-primary);font-size:18px;
}
.card__icon--accent{background:var(--c-accent-l);color:var(--c-accent)}
.card__icon--success{background:#E9F6F1;color:var(--c-success)}
.card h3{font-size:18px}
.card p{font-size:14px;color:var(--c-text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card .text-link{margin-top:auto;padding-top:6px}
.badge{
  display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:500;line-height:1.2;
  padding:5px 10px;border-radius:var(--r-pill);background:var(--c-primary-l);color:var(--c-primary);
}
.badge--accent{background:var(--c-accent-l);color:#B75F13}
.badge--success{background:#E9F6F1;color:var(--c-success)}
.card__tags{display:flex;flex-wrap:wrap;gap:8px}

/* ============ 流程步骤 ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-1);padding:26px;position:relative;transition:box-shadow .2s ease,transform .2s ease}
.step:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.step__num{font-size:13px;font-weight:700;letter-spacing:1px;color:var(--c-accent);margin-bottom:12px;display:block}
.step h3{font-size:17px;margin-bottom:8px}
.step p{font-size:14px;color:var(--c-text-2)}
.step::after{
  content:"";position:absolute;right:-14px;top:50%;width:8px;height:8px;border-radius:50%;background:var(--c-line);transform:translateY(-50%);
}
.step:last-child::after{display:none}

/* ============ 相关分类 ============ */
.related-links{display:flex;flex-wrap:wrap;gap:12px;margin-top:8px}
.related-link{
  display:inline-flex;align-items:center;gap:10px;padding:12px 20px;border-radius:var(--r-pill);
  background:#fff;border:1px solid var(--c-line);box-shadow:var(--sh-1);font-size:15px;font-weight:500;color:var(--c-text);
  transition:all .18s ease;
}
.related-link i{color:var(--c-primary);font-size:13px}
.related-link:hover{border-color:var(--c-primary);color:var(--c-primary);transform:translateY(-2px);box-shadow:var(--sh-2)}

/* ============ FAQ ============ */
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0 32px;align-items:start}
.faq-item{background:#fff;border-bottom:1px solid var(--c-line)}
.faq-item:first-child{border-top:1px solid var(--c-line)}
.faq-item summary{
  list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 4px;font-size:16px;font-weight:600;color:var(--c-text);cursor:pointer;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--c-primary)}
.faq-item summary .faq-ico{
  flex-shrink:0;width:28px;height:28px;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;
  background:var(--c-primary-l);color:var(--c-primary);font-size:12px;transition:transform .2s ease,background .2s ease,color .2s ease;
}
.faq-item[open] summary .faq-ico{transform:rotate(45deg);background:var(--c-primary);color:#fff}
.faq-item .faq-body{padding:0 44px 22px 4px;font-size:14px;color:var(--c-text-2)}

/* ============ 底部 CTA ============ */
.cta-band {
  background: var(--c-primary-d);
  color: #fff;
  padding: 72px 0;
}
.cta-band__inner{display:grid;grid-template-columns:1.4fr .9fr;gap:40px;align-items:center}
.cta-band h2{color:#fff;margin-bottom:14px}
.cta-band p{color:rgba(255,255,255,.82);font-size:15px;max-width:620px}
.cta-band__actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}
.cta-band__note{display:flex;flex-wrap:wrap;gap:18px;margin-top:22px;font-size:13px;color:rgba(255,255,255,.75)}
.cta-band__note span{display:inline-flex;align-items:center;gap:8px}
.cta-band__note i{color:var(--c-accent)}

/* ============ 页脚 ============ */
.site-footer{background:#fff;border-top:1px solid var(--c-line);padding-top:64px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;padding-bottom:48px}
.footer-brand p{font-size:14px;color:var(--c-text-2);margin-top:16px;max-width:340px}
.footer-domain{font-size:13px;color:var(--c-text-3);margin-top:10px}
.footer-col h4{font-size:15px;margin-bottom:16px}
.footer-col ul{display:grid;gap:10px}
.footer-col li{font-size:14px;color:var(--c-text-2)}
.footer-col a{color:var(--c-text-2);font-size:14px}
.footer-col a:hover{color:var(--c-primary)}
.footer-bottom{
  border-top:1px solid var(--c-line);padding:20px 0;display:flex;flex-wrap:wrap;gap:10px;
  justify-content:space-between;font-size:13px;color:var(--c-text-3);
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .layout-split{grid-template-columns:240px 1fr;gap:26px}
}
@media (max-width:991px){
  .section{padding:72px 0}
  .nav-search{display:none}
  .nav-search.is-open{
    display:flex;position:absolute;left:16px;right:16px;top:calc(100% + 8px);max-width:none;
    background:#fff;box-shadow:var(--sh-2);z-index:70;
  }
  .page-hero__inner{grid-template-columns:1fr;gap:30px}
  .page-hero__inner .page-hero__visual{order:-1}
  .icon-matrix{right:12px;bottom:-16px}
  .layout-split{grid-template-columns:1fr}
  .side-toc{position:static}
  .stat-strip{grid-template-columns:repeat(2,1fr)}
  .stat-strip__item:nth-child(2){border-right:0}
  .stat-strip__item:nth-child(1),
  .stat-strip__item:nth-child(2){border-bottom:1px solid var(--c-line)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .step::after{display:none}
  .cta-band__inner{grid-template-columns:1fr;gap:26px}
  .cta-band__actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .nav-drawer{display:block}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .section--tight{padding:36px 0}
  .nav-top__inner{height:60px;gap:12px}
  .brand__text{font-size:15px}
  .nav-actions .btn--primary{display:none}
  .nav-icon-cta{display:inline-flex}
  .page-hero{padding-bottom:52px}
  .card-grid{grid-template-columns:1fr}
  .faq-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .stat-strip{grid-template-columns:1fr}
  .stat-strip__item{border-right:0;border-bottom:1px solid var(--c-line)}
  .stat-strip__item:last-child{border-bottom:0}
  .footer-grid{grid-template-columns:1fr}
  .cta-band{padding:56px 0}
  .cta-band__actions .btn{width:100%}
  .page-hero__meta .meta-pill{font-size:12px;padding:7px 12px}
}
@media (max-width:575px){
  .brand__text{font-size:14px;max-width:150px;overflow:hidden;text-overflow:ellipsis}
  .icon-matrix{padding:10px;gap:8px}
  .icon-matrix span{width:36px;height:36px}
  .ca .card{padding:22px}
  .card{padding:22px}
}

/* roulang page: category2 */
:root{
  --c-primary:#1A5C9E;
  --c-primary-dark:#13497F;
  --c-primary-light:#EAF2FB;
  --c-accent:#F2842B;
  --c-accent-light:#FDF1E4;
  --c-success:#1F9D74;
  --c-error:#D64545;
  --c-warn:#C98A16;
  --c-bg:#F6F8FB;
  --c-card:#FFFFFF;
  --c-line:#E4EAF2;
  --c-text:#1F2937;
  --c-text-2:#5B6B7C;
  --c-text-3:#9AA7B4;
  --r-card:14px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(21,45,73,.06),0 8px 24px rgba(21,45,73,.06);
  --sh-2:0 4px 10px rgba(21,45,73,.08),0 16px 40px rgba(21,45,73,.12);
  --container:1200px;
  --sec-y:96px;
}
*,*::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:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:12px;}
a{color:inherit;text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease;}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid var(--c-primary);
  outline-offset:2px;
  border-radius:6px;
}
button{font-family:inherit;cursor:pointer;border:none;background:none;}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--c-text);}
h1{font-size:clamp(30px,4vw,44px);line-height:1.25;}
h2{font-size:clamp(24px,2.6vw,32px);line-height:1.3;}
h3{font-size:20px;line-height:1.4;font-weight:600;}
h4{font-size:16px;line-height:1.4;font-weight:600;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
.container{max-width:var(--container);margin:0 auto;padding:0 24px;}

/* ---------- 导航 ---------- */
.site-header{position:relative;z-index:60;background:#fff;}
.nav-top{border-bottom:1px solid var(--c-line);}
.nav-top__inner{display:flex;align-items:center;gap:20px;height:68px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand__mark{
  width:36px;height:36px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  background:var(--c-primary);color:#fff;font-size:16px;
  box-shadow:var(--sh-1);
}
.brand__text{font-size:17px;font-weight:700;letter-spacing:.2px;color:var(--c-primary-dark);}
.nav-search{
  flex:1 1 auto;max-width:400px;display:flex;align-items:center;gap:10px;
  height:44px;padding:0 16px;border:1px solid var(--c-line);background:#F8FAFC;
  border-radius:var(--r-pill);color:var(--c-text-3);transition:border-color .2s ease,box-shadow .2s ease,background-color .2s ease;
}
.nav-search i{font-size:14px;}
.nav-search input{
  flex:1;border:none;outline:none;background:transparent;font-size:14px;color:var(--c-text);
}
.nav-search input::placeholder{color:var(--c-text-3);}
.nav-search:focus-within{border-color:var(--c-primary);background:#fff;box-shadow:0 0 0 4px rgba(26,92,158,.10);}
.nav-actions{display:flex;align-items:center;gap:12px;margin-left:auto;}
.nav-burger{
  display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--c-line);
  color:var(--c-primary-dark);font-size:16px;background:#fff;
}
.nav-burger:hover{background:var(--c-primary-light);}
.nav-tabs{background:#F8FAFC;border-bottom:1px solid var(--c-line);}
.nav-tabs__wrap{position:relative;}
.nav-tabs__inner{
  display:flex;gap:8px;align-items:center;height:50px;overflow-x:auto;scroll-snap-type:x mandatory;
  scrollbar-width:none;-ms-overflow-style:none;
}
.nav-tabs__inner::-webkit-scrollbar{display:none;}
.nav-tab{
  flex:0 0 auto;scroll-snap-align:start;
  padding:7px 16px;border-radius:var(--r-pill);font-size:14px;color:var(--c-text-2);
  white-space:nowrap;transition:background-color .2s ease,color .2s ease;
}
.nav-tab:hover{background:var(--c-primary-light);color:var(--c-primary-dark);}
.nav-tab.is-active{background:var(--c-primary);color:#fff;font-weight:600;}
.nav-tab.is-active:hover{background:var(--c-primary-dark);color:#fff;}

/* ---------- 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;line-height:1;
  border:1px solid transparent;transition:all .2s ease;
}
.btn i{font-size:14px;}
.btn--primary{
  background:linear-gradient(180deg,#1F68AE,var(--c-primary));
  color:#fff;box-shadow:0 1px 2px rgba(21,45,73,.10);
}
.btn--primary:hover{background:var(--c-primary-dark);transform:translateY(-1px);box-shadow:var(--sh-1);}
.btn--primary:active{transform:translateY(1px);}
.btn--ghost{background:#fff;border-color:var(--c-primary);color:var(--c-primary);}
.btn--ghost:hover{background:var(--c-primary-light);transform:translateY(-1px);}
.btn--ghost:active{transform:translateY(1px);}
.btn--sm{height:40px;padding:0 18px;font-size:14px;}
.btn--block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;}
.text-link{color:var(--c-primary);font-weight:600;font-size:14px;display:inline-flex;align-items:center;gap:6px;}
.text-link i{transition:transform .2s ease;font-size:12px;}
.text-link:hover{color:var(--c-primary-dark);}
.text-link:hover i{transform:translateX(2px);}

/* ---------- 页头 ---------- */
.page-hero{
  position:relative;
  background:#fff;
  border-bottom:1px solid var(--c-line);
  padding:36px 0 56px;
  overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:56px;
  background:linear-gradient(180deg,rgba(246,248,251,0),var(--c-bg));
  pointer-events:none;
}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-text-2);flex-wrap:wrap;}
.breadcrumb a{color:var(--c-primary);}
.breadcrumb a:hover{color:var(--c-primary-dark);text-decoration:underline;}
.breadcrumb .sep{color:var(--c-text-3);}
.breadcrumb .current{color:var(--c-text-2);}
.page-hero__grid{
  display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
  gap:40px;align-items:center;margin-top:26px;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:500;letter-spacing:.4px;
  color:var(--c-primary-dark);background:var(--c-primary-light);
  padding:5px 12px;border-radius:var(--r-pill);
}
.page-hero h1{margin:16px 0 14px;}
.lead{font-size:17px;line-height:1.8;color:var(--c-text-2);max-width:620px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:500;padding:6px 12px;border-radius:var(--r-pill);
  background:var(--c-accent-light);color:#B85F14;border:1px solid #F7DFC6;
}
.tag--blue{background:var(--c-primary-light);color:var(--c-primary-dark);border-color:#D6E5F6;}
.page-hero__media{position:relative;}
.page-hero__media img{
  width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:var(--r-card);
  box-shadow:var(--sh-1);
}
.page-hero__media::before{
  content:"";position:absolute;inset:0;border-radius:var(--r-card);
  background:linear-gradient(180deg,rgba(234,242,251,.30),rgba(246,248,251,.42));
  pointer-events:none;z-index:1;
}
.icon-matrix{
  display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:28px;max-width:520px;
}
.icon-matrix__cell{
  background:var(--c-bg);border:1px solid var(--c-line);border-radius:12px;
  padding:14px 8px;text-align:center;font-size:12px;color:var(--c-text-2);
  transition:all .2s ease;
}
.icon-matrix__cell i{display:block;font-size:17px;color:var(--c-primary);margin-bottom:6px;}
.icon-matrix__cell:hover{background:#fff;box-shadow:var(--sh-1);transform:translateY(-2px);}

/* ---------- 通用板块 ---------- */
.section{padding:var(--sec-y) 0;}
.section--tight{padding:64px 0;}
.section-head{max-width:720px;margin-bottom:36px;}
.section-head .eyebrow{margin-bottom:14px;}
.section-head h2{margin-bottom:12px;}
.section-head p{color:var(--c-text-2);}
.section-head--row{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  max-width:none;flex-wrap:wrap;
}
.sec-num{
  font-size:12px;font-weight:600;letter-spacing:1px;color:var(--c-primary);
  display:block;margin-bottom:10px;
}

/* ---------- 长文 + 粘性侧栏 ---------- */
.layout-aside{
  display:grid;grid-template-columns:minmax(0,1fr) 336px;
  gap:44px;align-items:start;
}
.longform{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-1);padding:12px 0;}
.longform__section{padding:34px 40px;border-bottom:1px solid var(--c-line);}
.longform__section:last-child{border-bottom:none;}
.longform__head{display:flex;align-items:center;gap:14px;margin-bottom:14px;}
.longform__num{
  flex:0 0 auto;width:42px;height:42px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:var(--c-primary-light);color:var(--c-primary-dark);
  font-size:14px;font-weight:700;
}
.longform__section > p{color:var(--c-text-2);max-width:760px;}
.bullet-list{margin-top:22px;display:grid;gap:14px;}
.bullet-list li{
  display:flex;gap:12px;align-items:flex-start;
  background:var(--c-bg);border:1px solid var(--c-line);border-radius:12px;
  padding:16px 18px;transition:all .2s ease;
}
.bullet-list li:hover{border-color:#CFE0F3;background:#fff;box-shadow:var(--sh-1);}
.bullet-list i{color:var(--c-primary);font-size:15px;margin-top:4px;flex:0 0 auto;}
.bullet-list strong{display:block;font-size:15px;font-weight:600;color:var(--c-text);margin-bottom:2px;}
.bullet-list span{display:block;font-size:14px;color:var(--c-text-2);line-height:1.7;}

.sticky-box{position:sticky;top:24px;display:grid;gap:20px;}
.summary-card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:24px;
}
.summary-card h3{font-size:17px;margin-bottom:6px;}
.summary-card > p{font-size:13px;color:var(--c-text-2);margin-bottom:16px;}
.summary-nav{display:grid;gap:4px;}
.summary-nav a{
  display:flex;align-items:center;gap:10px;
  font-size:14px;color:var(--c-text-2);padding:9px 12px;border-radius:10px;
}
.summary-nav a:hover{background:var(--c-primary-light);color:var(--c-primary-dark);}
.summary-nav .num{font-size:12px;font-weight:600;color:var(--c-primary);}
.summary-foot{
  margin-top:18px;padding-top:18px;border-top:1px solid var(--c-line);
  display:grid;gap:12px;
}
.summary-note{
  display:flex;gap:10px;font-size:13px;color:var(--c-text-2);line-height:1.6;
}
.summary-note i{color:var(--c-accent);margin-top:4px;}
.tip-card{
  background:var(--c-accent-light);border:1px solid #F7DFC6;border-radius:var(--r-card);
  padding:20px 22px;
}
.tip-card h4{color:#B85F14;margin-bottom:8px;display:flex;align-items:center;gap:8px;}
.tip-card p{font-size:13px;color:#8C5315;line-height:1.7;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:900px;margin:0 auto;}
.faq-item{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  margin-bottom:14px;box-shadow:var(--sh-1);overflow:hidden;
}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:20px 24px;font-size:16px;font-weight:600;color:var(--c-text);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary .chev{
  flex:0 0 auto;width:28px;height:28px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--c-primary-light);color:var(--c-primary);
  font-size:12px;transition:transform .2s ease,background-color .2s ease;
}
.faq-item[open] summary .chev{transform:rotate(45deg);background:var(--c-primary);color:#fff;}
.faq-item .faq-body{padding:0 24px 22px;color:var(--c-text-2);font-size:15px;line-height:1.8;}

/* ---------- 推荐网格 ---------- */
.rec-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.rec-card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;display:flex;flex-direction:column;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.rec-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#CFE0F3;}
.rec-card__media{position:relative;aspect-ratio:16/9;overflow:hidden;}
.rec-card__media img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .3s ease;}
.rec-card:hover .rec-card__media img{transform:scale(1.03);}
.rec-card__badge{
  position:absolute;left:12px;top:12px;
  background:rgba(255,255,255,.94);color:var(--c-primary-dark);
  font-size:12px;font-weight:500;padding:4px 10px;border-radius:var(--r-pill);
}
.rec-card__body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.rec-card__body h3{font-size:17px;}
.rec-card__body p{font-size:14px;color:var(--c-text-2);line-height:1.7;}
.rec-card__body .text-link{margin-top:auto;}

/* ---------- CTA ---------- */
.cta-band{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:44px;display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);
  gap:36px;align-items:center;
}
.cta-band h2{margin-bottom:12px;}
.cta-band p{color:var(--c-text-2);max-width:560px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;justify-content:flex-end;}
.cta-actions .btn{min-width:150px;}

.back-top-row{display:flex;justify-content:center;margin-top:44px;}
.back-top{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;
  color:var(--c-primary-dark);background:var(--c-primary-light);
  padding:11px 22px;border-radius:var(--r-pill);border:1px solid #D6E5F6;
}
.back-top:hover{background:var(--c-primary);color:#fff;border-color:var(--c-primary);}

/* ---------- 页脚 ---------- */
.site-footer{background:#fff;border-top:1px solid var(--c-line);padding:64px 0 28px;margin-top:16px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;}
.footer-brand p{font-size:14px;color:var(--c-text-2);line-height:1.8;margin-top:16px;max-width:340px;}
.footer-domain{font-size:13px;color:var(--c-text-3);margin-top:10px;}
.footer-col h4{font-size:15px;margin-bottom:16px;}
.footer-col ul{display:grid;gap:10px;}
.footer-col li{font-size:14px;color:var(--c-text-2);}
.footer-col a{color:var(--c-text-2);}
.footer-col a:hover{color:var(--c-primary);text-decoration:underline;}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--c-line);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom p{font-size:13px;color:var(--c-text-3);}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .page-hero__grid{gap:32px;}
}
@media (max-width:991px){
  :root{--sec-y:72px;}
  .layout-aside{grid-template-columns:minmax(0,1fr);gap:32px;}
  .sticky-box{position:static;}
  .cta-band{grid-template-columns:minmax(0,1fr);padding:36px;}
  .cta-actions{justify-content:flex-start;}
  .rec-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:30px;}
}
@media (max-width:767px){
  :root{--sec-y:58px;}
  .container{padding:0 20px;}
  .nav-search{display:none;}
  .nav-search.is-open{
    display:flex;position:absolute;left:20px;right:20px;top:14px;max-width:none;z-index:70;
    background:#fff;box-shadow:var(--sh-2);
  }
  .nav-burger{display:inline-flex;align-items:center;justify-content:center;}
  .nav-top__inner{position:relative;}
  .nav-tabs__inner{height:48px;}
  .page-hero{padding:26px 0 42px;}
  .page-hero__grid{grid-template-columns:minmax(0,1fr);gap:26px;}
  .lead{font-size:16px;}
  .icon-matrix{grid-template-columns:repeat(2,1fr);}
  .longform__section{padding:26px 22px;}
  .bullet-list li{padding:14px 15px;}
  .rec-grid{grid-template-columns:minmax(0,1fr);}
  .cta-band{padding:28px 22px;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:minmax(0,1fr);}
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media (max-width:575px){
  .brand__text{font-size:15px;}
  .nav-actions .btn--sm{padding:0 14px;font-size:13px;}
  .summary-card{padding:20px;}
  .longform__head{align-items:flex-start;}
}