/* roulang page: index */
:root{
  --c-primary:#123B32;
  --c-primary-deep:#0E2B24;
  --c-primary-soft:#E7EDEA;
  --c-primary-soft-2:#D7E3DE;
  --c-accent:#E2571F;
  --c-accent-dark:#C4460F;
  --c-signal:#C9F26B;
  --c-bg:#F6F4EF;
  --c-surface:#FFFFFF;
  --c-line:#E4E1D8;
  --c-line-soft:#DCD8CE;
  --c-text:#1A1D1B;
  --c-text-2:#5C635E;
  --c-text-3:#9AA09B;
  --r-card:16px;
  --r-img:12px;
  --r-input:12px;
  --r-pill:999px;
  --shadow-1:0 1px 2px rgba(18,59,50,.06),0 8px 24px -12px rgba(18,59,50,.18);
  --shadow-2:0 2px 4px rgba(18,59,50,.08),0 18px 40px -16px rgba(18,59,50,.28);
  --t:300ms ease;
  --bs-primary:#123B32;
  --bs-body-bg:#F6F4EF;
  --bs-body-color:#1A1D1B;
  --bs-link-color:#123B32;
  --bs-link-hover-color:#E2571F;
  --bs-border-color:#E4E1D8;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",-apple-system,"Segoe UI",sans-serif;
  font-size:16.5px;
  line-height:1.8;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:var(--c-primary);text-decoration:none;transition:color var(--t),text-underline-offset var(--t)}
a:hover{color:var(--c-accent)}
p{margin:0 0 1.1em}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em}
h1{font-size:clamp(30px,4.4vw,52px);line-height:1.2;font-weight:800}
h2{font-size:clamp(24px,2.6vw,32px);line-height:1.3}
h3{font-size:20px;line-height:1.45;font-weight:600}
.num,.trust-num,.stat-num,.plan-price{font-variant-numeric:tabular-nums;letter-spacing:.02em}
button,input{font-family:inherit}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.sec{padding:96px 0}
.sec.tight{padding-top:72px}
.sec.alt{background:var(--c-surface)}
.sec-head{margin-bottom:44px;max-width:760px}
.sec-num{display:block;font-size:12px;letter-spacing:.14em;font-weight:700;color:var(--c-accent);margin-bottom:10px;text-transform:uppercase}
.sec-head h2{position:relative;padding-left:18px}
.sec-head h2::before{content:"";position:absolute;left:0;top:.18em;width:6px;height:22px;border-radius:3px;background:var(--c-accent)}
.sec-lead{margin-top:14px;color:var(--c-text-2);font-size:16px;line-height:1.85;max-width:66ch}

/* ---------- 头部导航：分屏联动 ---------- */
.site-header{position:sticky;top:0;z-index:1030;background:rgba(246,244,239,.86);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--c-line)}
.nav-wrap{display:grid;grid-template-columns:58% 42%;align-items:center;min-height:68px}
.nav-left{display:flex;align-items:center;gap:34px;min-width:0}
.brand{display:flex;flex-direction:column;line-height:1.1;gap:3px;flex:0 0 auto}
.brand-main{font-size:19px;font-weight:800;color:var(--c-primary);letter-spacing:-.01em}
.brand-sub{font-size:11px;letter-spacing:.1em;color:var(--c-text-2)}
a.brand:hover .brand-main{color:var(--c-accent)}
.main-nav{display:flex;align-items:center;gap:26px;min-width:0}
.main-nav a{font-size:15px;color:var(--c-text-2);font-weight:500;position:relative;padding:6px 0;white-space:nowrap}
.main-nav a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;background:var(--c-accent);transform:scaleX(0);transform-origin:left;transition:transform var(--t)}
.main-nav a:hover{color:var(--c-primary)}
.main-nav a:hover::after{transform:scaleX(1)}
.main-nav a.active{color:var(--c-primary);font-weight:700}
.main-nav a.active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;justify-content:flex-end;gap:14px;background:var(--c-primary);min-height:68px;padding:0 22px;border-radius:0 0 18px 18px}
.nav-search{display:flex;align-items:center;gap:8px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.18);border-radius:var(--r-pill);padding:7px 14px;min-width:180px}
.nav-search i{color:rgba(255,255,255,.7);font-size:13px}
.nav-search input{background:transparent;border:0;outline:none;color:#fff;font-size:14px;width:100%}
.nav-search input::placeholder{color:rgba(255,255,255,.62)}
.nav-toggle{display:none;width:42px;height:42px;border-radius:12px;border:1px solid rgba(255,255,255,.28);background:transparent;color:#fff;align-items:center;justify-content:center;font-size:16px}
.drawer{position:fixed;inset:0;z-index:1050;pointer-events:none}
.drawer-panel{position:absolute;top:0;right:0;height:100%;width:min(86vw,340px);background:var(--c-primary);color:#fff;padding:26px 24px;transform:translateX(102%);transition:transform 320ms ease;display:flex;flex-direction:column;gap:8px;box-shadow:-20px 0 50px -20px rgba(0,0,0,.4)}
.drawer-mask{position:absolute;inset:0;background:rgba(14,43,36,.45);opacity:0;transition:opacity 320ms ease}
.drawer.open{pointer-events:auto}
.drawer.open .drawer-panel{transform:translateX(0)}
.drawer.open .drawer-mask{opacity:1}
.drawer-title{font-size:12px;letter-spacing:.16em;color:rgba(255,255,255,.6);margin-bottom:8px}
.drawer-panel a{color:#fff;font-size:17px;line-height:2.6;border-bottom:1px solid rgba(255,255,255,.12)}
.drawer-panel a:hover{color:var(--c-signal)}
.drawer-close{align-self:flex-end;background:transparent;border:1px solid rgba(255,255,255,.3);color:#fff;width:38px;height:38px;border-radius:10px;margin-bottom:6px}
.drawer-cta{margin-top:auto}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--r-pill);font-weight:600;font-size:15px;padding:12px 26px;min-height:48px;border:1.5px solid transparent;transition:all var(--t);cursor:pointer;line-height:1.2}
.btn-primary{background:var(--c-accent);color:#fff;border-color:var(--c-accent)}
.btn-primary:hover,.btn-primary:focus{background:var(--c-accent-dark);border-color:var(--c-accent-dark);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:transparent;color:var(--c-primary);border-color:var(--c-primary)}
.btn-ghost:hover{background:rgba(18,59,50,.08);color:var(--c-primary);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-light-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn-light-ghost:hover{background:rgba(255,255,255,.14);color:#fff;transform:translateY(-2px)}
.btn-sm{padding:9px 20px;min-height:40px;font-size:14px}
.link-more{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:14px;color:var(--c-primary)}
.link-more i{transition:transform var(--t)}
.link-more:hover{color:var(--c-accent);text-decoration:underline;text-underline-offset:3px}
.link-more:hover i{transform:translateX(3px)}

/* ---------- 徽章 ---------- */
.badge-cat{display:inline-block;background:var(--c-primary-soft);color:var(--c-primary);font-size:11.5px;font-weight:600;padding:4px 12px;border-radius:var(--r-pill);letter-spacing:.04em}
.badge-data{display:inline-block;background:var(--c-signal);color:#132018;font-size:11.5px;font-weight:700;padding:4px 12px;border-radius:var(--r-pill)}
.badge-count{display:inline-block;background:var(--c-accent);color:#fff;font-size:11.5px;font-weight:700;padding:4px 12px;border-radius:var(--r-pill)}

/* ---------- Hero 分屏 ---------- */
.hero{padding:56px 0 0;background:linear-gradient(180deg,#F6F4EF 0%,#F1EEE6 100%)}
.hero-grid{display:grid;grid-template-columns:58% 42%;align-items:stretch;gap:0}
.hero-content{padding:36px 48px 64px 0;display:flex;flex-direction:column;justify-content:center}
.hero-tag{display:inline-flex;align-items:center;gap:8px;align-self:flex-start;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-pill);padding:6px 16px;font-size:13px;color:var(--c-text-2);box-shadow:var(--shadow-1);margin-bottom:22px}
.hero-tag i{color:var(--c-accent)}
.hero h1{max-width:15ch}
.hero-sub{margin-top:20px;font-size:18px;line-height:1.75;color:var(--c-text-2);max-width:38ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.trust-bar{display:flex;align-items:center;gap:0;margin-top:44px;padding-top:26px;border-top:1px solid var(--c-line)}
.trust-item{flex:1;padding:0 22px;border-right:1px solid var(--c-line)}
.trust-item:first-child{padding-left:0}
.trust-item:last-child{border-right:0}
.trust-num{display:block;font-size:28px;font-weight:800;color:var(--c-primary);line-height:1.2}
.trust-num em{font-size:14px;font-style:normal;font-weight:600;margin-left:3px;color:var(--c-text-2)}
.trust-label{display:block;font-size:13px;color:var(--c-text-2);margin-top:4px}
.hero-visual{position:relative;border-radius:var(--r-card);overflow:hidden;min-height:560px;background:var(--c-primary-deep)}
.hero-visual img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;border-radius:var(--r-card)}
.hero-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(45deg,rgba(18,59,50,.92) 0%,rgba(14,43,36,.86) 55%,rgba(14,43,36,.7) 100%)}
.hero-visual-inner{position:absolute;inset:0;z-index:2;display:flex;flex-direction:column;justify-content:space-between;padding:28px}
.hero-visual-label{color:#fff;font-size:13px;letter-spacing:.12em;text-transform:uppercase;opacity:.85}
.hero-visual-title{color:#fff;font-size:19px;font-weight:700;line-height:1.5;max-width:16ch}
.entry-card{margin-top:18px;background:#fff;border-radius:var(--r-card);box-shadow:var(--shadow-2);padding:20px;max-width:340px;align-self:flex-end}
.entry-card h3{font-size:15px;font-weight:700;margin-bottom:12px}
.entry-list li{display:flex;align-items:center;gap:10px;padding:9px 0;border-bottom:1px dashed var(--c-line);font-size:14px}
.entry-list li:last-child{border-bottom:0}
.entry-list i{color:var(--c-accent);width:16px}
.entry-list a{color:var(--c-text);font-weight:500}
.entry-list a:hover{color:var(--c-accent)}
.entry-input{margin-top:12px}
.entry-input input{width:100%;height:44px;border-radius:var(--r-input);border:1px solid var(--c-line-soft);padding:0 14px;font-size:14px;outline:none;transition:all var(--t)}
.entry-input input:focus{border-color:var(--c-primary);box-shadow:0 0 0 4px rgba(18,59,50,.12)}
.entry-card .btn{width:100%;margin-top:10px}

/* ---------- 价值主张 2×2 ---------- */
.value-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.value-item{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:32px;box-shadow:var(--shadow-1);transition:all var(--t)}
.value-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.value-icon{width:46px;height:46px;border-radius:14px;background:var(--c-primary-soft);color:var(--c-primary);display:flex;align-items:center;justify-content:center;font-size:18px;margin-bottom:18px}
.value-item h3{margin-bottom:10px}
.value-item p{color:var(--c-text-2);font-size:15px;margin:0;line-height:1.85}

/* ---------- 功能分组 ---------- */
.tabs{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px}
.tabs a{padding:8px 20px;border-radius:var(--r-pill);border:1px solid var(--c-line);font-size:14px;color:var(--c-text-2);background:var(--c-surface);font-weight:500}
.tabs a:hover{border-color:var(--c-primary);color:var(--c-primary);transform:translateY(-2px);box-shadow:var(--shadow-1)}
.feature-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:24px}
.f-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:28px;box-shadow:var(--shadow-1);transition:all var(--t);display:flex;flex-direction:column}
.f-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.f-card.lg{grid-column:span 3;padding:34px}
.f-card.sm{grid-column:span 2}
.f-card .badge-cat{align-self:flex-start;margin-bottom:16px}
.f-card h3{margin-bottom:10px}
.f-card p{color:var(--c-text-2);font-size:14.5px;margin-bottom:16px}
.f-points li{position:relative;padding-left:20px;font-size:14px;color:var(--c-text-2);margin-bottom:8px}
.f-points li::before{content:"";position:absolute;left:0;top:.62em;width:8px;height:8px;border-radius:50%;background:var(--c-primary-soft-2);border:2px solid var(--c-primary)}
.f-card .link-more{margin-top:auto}
.f-thumb{border-radius:var(--r-img);overflow:hidden;margin-bottom:18px;aspect-ratio:16/9}
.f-thumb img{width:100%;height:100%;object-fit:cover;border-radius:var(--r-img);transition:transform var(--t)}
.f-card:hover .f-thumb img{transform:scale(1.04)}

/* ---------- 使用场景 阶梯 ---------- */
.stage-wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;align-items:start}
.stage-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:26px 24px;box-shadow:var(--shadow-1);transition:all var(--t);position:relative}
.stage-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.stage-card:nth-child(2){margin-top:26px}
.stage-card:nth-child(3){margin-top:52px}
.stage-card:nth-child(4){margin-top:78px}
.stage-idx{font-size:12px;letter-spacing:.14em;font-weight:700;color:var(--c-accent);display:block;margin-bottom:12px}
.stage-card h3{font-size:18px;margin-bottom:8px}
.stage-card p{font-size:14px;color:var(--c-text-2);margin-bottom:14px}

/* ---------- 案例交错 ---------- */
.case-row{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;margin-bottom:72px}
.case-row:last-child{margin-bottom:0}
.case-row.reverse .case-media{order:2}
.case-media{border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-1)}
.case-media img{width:100%;height:100%;object-fit:cover;border-radius:var(--r-card);aspect-ratio:4/3;transition:transform var(--t)}
.case-media:hover img{transform:scale(1.03)}
.case-row h3{font-size:24px;margin:12px 0 14px}
.case-row p{color:var(--c-text-2);font-size:15px}
.case-stats{display:flex;flex-wrap:wrap;gap:28px;margin-top:22px;padding-top:20px;border-top:1px solid var(--c-line)}
.case-stats .stat-num{font-size:26px;font-weight:800;color:var(--c-primary);display:block;line-height:1.2}
.case-stats .stat-label{font-size:13px;color:var(--c-text-2)}

/* ---------- 价格 ---------- */
.plan-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;align-items:start;margin-top:20px}
.plan-card{position:relative;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:34px 30px;transition:all var(--t)}
.plan-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--c-primary-soft-2)}
.plan-card.featured{transform:translateY(-12px);border:1.5px solid var(--c-primary);box-shadow:var(--shadow-1)}
.plan-card.featured:hover{transform:translateY(-16px);box-shadow:var(--shadow-2)}
.plan-flag{position:absolute;top:-13px;left:30px;background:var(--c-accent);color:#fff;font-size:12px;font-weight:700;padding:5px 14px;border-radius:var(--r-pill);letter-spacing:.06em}
.plan-name{font-size:18px;font-weight:700;margin-bottom:6px}
.plan-desc{font-size:13.5px;color:var(--c-text-2);margin-bottom:20px}
.plan-price{font-size:36px;font-weight:800;color:var(--c-primary);line-height:1.1}
.plan-price span{font-size:14px;font-weight:500;color:var(--c-text-2);margin-left:4px}
.plan-list{margin:24px 0;border-top:1px solid var(--c-line);padding-top:20px}
.plan-list li{display:flex;gap:10px;font-size:14.5px;color:var(--c-text-2);padding:7px 0}
.plan-list i{color:var(--c-primary);font-size:13px;margin-top:.42em}
.plan-card .btn{width:100%}

/* ---------- 资讯列表 ---------- */
.news-bar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;margin-bottom:34px}
.news-filter{display:flex;gap:10px;flex-wrap:wrap}
.news-filter a{font-size:13.5px;color:var(--c-text-2);border:1px solid var(--c-line);background:var(--c-surface);border-radius:var(--r-pill);padding:7px 16px}
.news-filter a:hover{border-color:var(--c-primary);color:var(--c-primary)}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.news-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:20px;box-shadow:var(--shadow-1);transition:all var(--t);display:flex;flex-direction:column}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.news-cover{display:block;border-radius:var(--r-img);overflow:hidden;aspect-ratio:16/9;margin-bottom:16px;background:var(--c-primary-soft)}
.news-cover img{width:100%;height:100%;object-fit:cover;border-radius:var(--r-img);transition:transform var(--t)}
.news-card:hover .news-cover img{transform:scale(1.04)}
.news-card h3{font-size:17px;margin:12px 0 10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card h3 a{color:var(--c-text)}
.news-card h3 a:hover{color:var(--c-accent)}
.news-card p{font-size:14px;color:var(--c-text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:16px}
.news-foot{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--c-line);padding-top:14px;margin-top:auto;font-size:13px;color:var(--c-text-3)}
.news-empty{min-height:240px;grid-column:1/-1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;border:1px dashed var(--c-line-soft);border-radius:var(--r-card);background:var(--c-surface);color:var(--c-text-2)}
.news-empty i{font-size:26px;color:var(--c-primary-soft-2)}
.news-empty a{font-size:14px;font-weight:600}

/* ---------- FAQ ---------- */
.faq-acc{border:0;background:transparent;max-width:920px}
.faq-acc .accordion-item{border:0;border-bottom:1px solid var(--c-line);background:transparent;position:relative}
.faq-acc .accordion-item:first-child{border-top:1px solid var(--c-line)}
.faq-acc .accordion-item::before{content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:3px;background:var(--c-accent);opacity:0;transition:opacity var(--t)}
.faq-acc .accordion-item:has(.accordion-button:not(.collapsed))::before{opacity:1}
.faq-acc .accordion-button{background:transparent;box-shadow:none;border:0;font-size:17px;font-weight:600;color:var(--c-text);padding:22px 6px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.faq-acc .accordion-button:not(.collapsed){color:var(--c-primary);background:transparent}
.faq-acc .accordion-button::after{display:none}
.faq-acc .accordion-button:hover{color:var(--c-primary)}
.faq-acc .accordion-body{padding:0 6px 26px 20px;color:var(--c-text-2);font-size:15px;line-height:1.85;background:transparent}
.faq-icon{position:relative;width:18px;height:18px;flex:0 0 18px}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--c-accent);border-radius:2px;transition:transform var(--t)}
.faq-icon::before{left:0;top:8px;width:18px;height:2px}
.faq-icon::after{left:8px;top:0;width:2px;height:18px}
.accordion-button:not(.collapsed) .faq-icon::after{transform:scaleY(0)}
.accordion-button:not(.collapsed) .faq-icon{transform:rotate(180deg);transition:transform var(--t)}

/* ---------- CTA 条 ---------- */
.cta-band{background:linear-gradient(45deg,#123B32 0%,#0E2B24 100%);border-radius:var(--r-card);padding:56px 48px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;color:#fff;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;right:-60px;top:-60px;width:240px;height:240px;border-radius:50%;background:rgba(201,242,107,.08)}
.cta-band h2{color:#fff;font-size:clamp(22px,2.4vw,30px);position:relative}
.cta-band p{color:rgba(255,255,255,.78);margin:12px 0 0;font-size:15px;max-width:52ch;position:relative}
.cta-band .cta-actions{display:flex;gap:14px;flex-wrap:wrap;position:relative}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-primary-deep);color:rgba(246,244,239,.8);margin-top:96px;border-top:1px solid rgba(201,242,107,.08);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:40px;padding-bottom:48px}
.footer-brand .brand-main{color:#fff;font-size:20px}
.footer-brand .brand-sub{color:rgba(246,244,239,.62)}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.85;color:rgba(246,244,239,.68);max-width:34ch}
.footer-title{color:#fff;font-size:15px;font-weight:700;margin-bottom:18px;letter-spacing:.02em}
.footer-links li{margin-bottom:10px}
.footer-links a{color:rgba(246,244,239,.78);font-size:14px;display:inline-block;transition:all var(--t)}
.footer-links a:hover{color:var(--c-signal);transform:translateX(-2px)}
.footer-contact li{font-size:14px;color:rgba(246,244,239,.78);margin-bottom:12px;display:flex;gap:10px;align-items:flex-start}
.footer-contact i{color:var(--c-signal);margin-top:.4em;font-size:13px}
.footer-bottom{border-top:1px solid rgba(246,244,239,.12);padding:22px 0 30px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;font-size:13px;color:rgba(246,244,239,.6)}
.footer-bottom a{color:rgba(246,244,239,.68)}
.footer-bottom a:hover{color:var(--c-signal)}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .nav-wrap{grid-template-columns:1fr auto}
  .nav-right{border-radius:0 0 14px 14px;padding:0 16px}
  .nav-search{min-width:140px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-content{padding:24px 0 8px}
  .hero-visual{min-height:480px;order:2}
  .feature-grid{grid-template-columns:repeat(4,1fr)}
  .f-card.lg{grid-column:span 4}
  .f-card.sm{grid-column:span 2}
  .stage-wrap{grid-template-columns:repeat(2,1fr);gap:22px}
  .stage-card:nth-child(3),.stage-card:nth-child(4){margin-top:0}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
  .sec{padding:72px 0}
}
@media (max-width:991.98px){
  .main-nav{display:none}
  .nav-search{display:none}
  .nav-toggle{display:inline-flex}
  .nav-left{gap:16px}
  .case-row{grid-template-columns:1fr;gap:26px;margin-bottom:56px}
  .case-row.reverse .case-media{order:0}
  .plan-grid{grid-template-columns:1fr;max-width:520px;margin:0 auto}
  .plan-card.featured{transform:none}
  .plan-card.featured:hover{transform:translateY(-4px)}
  .value-grid{grid-template-columns:1fr;gap:20px}
  .cta-band{padding:40px 28px}
}
@media (max-width:767.98px){
  .container{padding:0 20px}
  body{font-size:16px}
  .sec{padding:56px 0}
  .hero{padding-top:32px}
  .hero-content{padding:12px 0 0}
  .hero-visual{min-height:400px;border-radius:14px}
  .hero-visual-inner{padding:20px}
  .entry-card{max-width:100%;padding:18px}
  .hero-actions .btn{width:100%}
  .trust-bar{flex-direction:column;align-items:flex-start;gap:18px;padding-top:22px}
  .trust-item{border-right:0;border-left:2px solid var(--c-line);padding:0 0 0 16px;width:100%}
  .trust-item:first-child{padding-left:16px}
  .feature-grid{grid-template-columns:1fr}
  .f-card.lg,.f-card.sm{grid-column:span 1;padding:24px}
  .stage-wrap{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .news-bar{flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom{flex-direction:column;gap:8px}
  .cta-band{padding:34px 22px;border-radius:14px}
  .sec-head{margin-bottom:32px}
}
@media (max-width:575.98px){
  h1{font-size:28px}
  .hero-sub{font-size:16.5px}
  .nav-right{padding:0 12px;border-radius:0 0 12px 12px}
  .btn{width:100%}
  .nav-right .btn,.drawer-cta .btn{width:auto}
}

/* roulang page: category1 */
:root{
  --c-primary:#123B32;
  --c-primary-deep:#0E2B24;
  --c-accent:#E2571F;
  --c-signal:#C9F26B;
  --c-bg:#F6F4EF;
  --c-surface:#FFFFFF;
  --c-line:#E4E1D8;
  --c-text:#1A1D1B;
  --c-text-2:#5C635E;
  --r-card:16px;
  --r-img:12px;
  --shadow-1:0 1px 2px rgba(18,59,50,.06),0 8px 24px -12px rgba(18,59,50,.18);
  --shadow-2:0 2px 4px rgba(18,59,50,.08),0 18px 40px -16px rgba(18,59,50,.28);
  --bs-primary:#123B32;
  --bs-body-bg:#F6F4EF;
  --bs-body-color:#1A1D1B;
  --bs-border-color:#E4E1D8;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",sans-serif;
  background:var(--c-bg);
  color:var(--c-text);
  font-size:16.5px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-align:left;
}
img{max-width:100%;display:block;object-fit:cover;}
a{color:var(--c-primary);text-decoration:none;text-underline-offset:3px;transition:color .3s ease,background-color .3s ease,border-color .3s ease,transform .3s ease;}
a:hover{color:var(--c-accent);text-decoration:underline;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;}
p{margin:0 0 1.1em;}
ul{margin:0;padding:0;list-style:none;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.num{font-variant-numeric:tabular-nums;letter-spacing:.02em;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(246,244,239,.88);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--c-line);
}
.nav-wrap{display:flex;align-items:center;gap:28px;min-height:68px;}
.brand{display:flex;flex-direction:column;line-height:1.15;text-decoration:none;flex-shrink:0;}
.brand:hover{text-decoration:none;}
.brand-main{font-size:19px;font-weight:800;color:var(--c-primary);letter-spacing:.02em;}
.brand-sub{font-size:11px;letter-spacing:.1em;color:var(--c-text-2);margin-top:2px;}
.main-nav{display:flex;align-items:center;gap:6px;flex:1;}
.main-nav a{
  font-size:15px;font-weight:500;color:var(--c-text);padding:9px 14px;border-radius:999px;
  transition:background-color .3s ease,color .3s ease;
}
.main-nav a:hover{background:rgba(18,59,50,.08);color:var(--c-primary);text-decoration:none;}
.main-nav a.active{background:var(--c-primary);color:#fff;}
.nav-side{
  display:flex;align-items:center;gap:12px;
  background:var(--c-primary);border-radius:999px;padding:6px 6px 6px 18px;
}
.nav-search{
  display:flex;align-items:center;gap:8px;color:rgba(255,255,255,.72);font-size:14px;
}
.nav-search input{
  width:120px;height:34px;border:none;border-radius:999px;
  background:rgba(255,255,255,.12);color:#fff;font-size:13.5px;padding:0 12px;
}
.nav-search input::placeholder{color:rgba(255,255,255,.6);}
.nav-search input:focus{outline:2px solid var(--c-signal);outline-offset:1px;}
.btn-nav-cta{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--c-accent);color:#fff;font-weight:600;font-size:14.5px;
  padding:9px 20px;border-radius:999px;white-space:nowrap;
}
.btn-nav-cta:hover{background:#c94815;color:#fff;text-decoration:none;transform:translateY(-1px);}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;border:1px solid var(--c-line);border-radius:12px;background:#fff;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-primary);margin:0 auto;border-radius:2px;}

/* 移动抽屉 */
.nav-drawer{
  position:fixed;top:0;right:0;height:100%;width:290px;max-width:86vw;
  background:var(--c-primary);z-index:1050;padding:78px 26px 30px;
  transform:translateX(100%);transition:transform .34s ease;
  display:flex;flex-direction:column;gap:6px;overflow-y:auto;
}
.nav-drawer.open{transform:translateX(0);}
.nav-drawer a{color:rgba(255,255,255,.9);font-size:17px;padding:12px 0;border-bottom:1px solid rgba(255,255,255,.12);}
.nav-drawer a:hover,.nav-drawer a.active{color:var(--c-signal);text-decoration:none;}
.nav-drawer .drawer-cta{
  margin-top:22px;background:var(--c-accent);color:#fff;text-align:center;border-radius:999px;
  padding:13px;font-weight:600;border-bottom:none;
}
.nav-drawer .drawer-cta:hover{color:#fff;background:#c94815;}
.drawer-close{
  position:absolute;top:20px;right:20px;width:38px;height:38px;border-radius:50%;
  border:1px solid rgba(255,255,255,.3);background:transparent;color:#fff;font-size:16px;cursor:pointer;
}
.drawer-backdrop{
  position:fixed;inset:0;background:rgba(14,43,36,.5);opacity:0;visibility:hidden;
  transition:opacity .3s ease,visibility .3s ease;z-index:1040;
}
.drawer-backdrop.open{opacity:1;visibility:visible;}

/* ---------- 分类页页头 ---------- */
.cat-hero{
  position:relative;min-height:300px;display:flex;align-items:center;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  border-radius:0 0 var(--r-card) var(--r-card);
  overflow:hidden;
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(14,43,36,.94) 0%,rgba(18,59,50,.84) 48%,rgba(18,59,50,.6) 100%);
}
.cat-hero .container{position:relative;z-index:2;padding-top:52px;padding-bottom:52px;}
.breadcrumb-line{font-size:13px;color:rgba(255,255,255,.68);margin-bottom:14px;display:flex;flex-wrap:wrap;gap:8px;align-items:center;}
.breadcrumb-line a{color:rgba(255,255,255,.82);}
.breadcrumb-line a:hover{color:var(--c-signal);text-decoration:none;}
.breadcrumb-line .sep{color:rgba(255,255,255,.4);}
.breadcrumb-line .cur{color:rgba(255,255,255,.62);}
.cat-hero h1{
  font-size:clamp(28px,3.8vw,44px);line-height:1.24;font-weight:800;color:#fff;letter-spacing:-.01em;
  max-width:760px;
}
.cat-hero .hero-lead{
  margin-top:16px;max-width:660px;color:rgba(255,255,255,.82);font-size:16.5px;line-height:1.85;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.hero-tags span{
  display:inline-flex;align-items:center;gap:6px;
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.24);
  color:#fff;font-size:13px;padding:5px 14px;border-radius:999px;
}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0;}
.section.tight{padding:64px 0;}
.sec-head{display:flex;align-items:flex-start;gap:16px;margin-bottom:40px;}
.sec-head .bar{width:6px;height:44px;background:var(--c-accent);border-radius:3px;flex-shrink:0;margin-top:4px;}
.sec-no{font-size:12px;letter-spacing:.14em;color:var(--c-accent);font-weight:700;display:block;margin-bottom:6px;}
.sec-head h2{font-size:clamp(23px,2.6vw,32px);line-height:1.32;color:var(--c-primary);}
.sec-desc{color:var(--c-text-2);font-size:15.5px;max-width:760px;margin-top:10px;}

/* 数据条 */
.stat-band{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--shadow-1);padding:32px 28px;display:grid;
  grid-template-columns:repeat(4,1fr);gap:0;margin-top:-42px;position:relative;z-index:5;
}
.stat-item{padding:0 24px;border-right:1px solid var(--c-line);}
.stat-item:last-child{border-right:none;}
.stat-item .v{font-size:30px;font-weight:800;color:var(--c-primary);line-height:1.2;}
.stat-item .v em{font-style:normal;font-size:15px;font-weight:600;color:var(--c-accent);margin-left:3px;}
.stat-item .k{font-size:13.5px;color:var(--c-text-2);margin-top:6px;}

/* ---------- 图文锚点流 ---------- */
.anchor-nav{
  display:flex;flex-wrap:wrap;gap:10px;margin-bottom:52px;
}
.anchor-nav a{
  font-size:14px;padding:8px 18px;border-radius:999px;border:1px solid var(--c-line);
  background:var(--c-surface);color:var(--c-text-2);
}
.anchor-nav a:hover{border-color:var(--c-primary);color:var(--c-primary);text-decoration:none;transform:translateY(-2px);}
.row-item{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
  padding:44px 0;border-bottom:1px solid var(--c-line);
}
.row-item:last-child{border-bottom:none;}
.row-item .media{border-radius:var(--r-img);overflow:hidden;box-shadow:var(--shadow-1);position:relative;}
.row-item .media img{width:100%;height:300px;transition:transform .5s ease;}
.row-item:hover .media img{transform:scale(1.03);}
.row-item .idx{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:50%;background:var(--c-signal);color:#1A1D1B;
  font-size:14px;font-weight:800;margin-bottom:14px;
}
.row-item h3{font-size:21px;color:var(--c-primary);margin-bottom:12px;line-height:1.4;}
.row-item p{color:var(--c-text-2);font-size:15.5px;margin-bottom:14px;}
.row-item.flip .media{order:2;}
.row-item.flip .body{order:1;}
.point-list li{
  display:flex;gap:10px;font-size:15px;color:var(--c-text);padding:7px 0;line-height:1.7;
}
.point-list li i{color:var(--c-accent);font-size:13px;margin-top:6px;flex-shrink:0;}

/* ---------- 步骤条 ---------- */
.step-band{background:var(--c-primary-deep);color:#fff;border-radius:var(--r-card);padding:56px 40px;}
.step-band .sec-head h2{color:#fff;}
.step-band .sec-desc{color:rgba(255,255,255,.72);}
.step-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.step-card{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
  border-radius:var(--r-card);padding:26px 22px;transition:transform .3s ease,background-color .3s ease;
}
.step-card:hover{transform:translateY(-4px);background:rgba(255,255,255,.1);}
.step-card .sn{font-size:13px;letter-spacing:.14em;color:var(--c-signal);font-weight:700;}
.step-card h3{font-size:18px;color:#fff;margin:12px 0 10px;}
.step-card p{font-size:14.5px;color:rgba(255,255,255,.72);margin:0;line-height:1.8;}

/* ---------- 场景卡 ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.scene-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:28px 26px;box-shadow:var(--shadow-1);transition:transform .3s ease,box-shadow .3s ease;
  display:flex;flex-direction:column;
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.scene-card .ic{
  width:46px;height:46px;border-radius:12px;background:rgba(18,59,50,.08);
  color:var(--c-primary);display:flex;align-items:center;justify-content:center;font-size:19px;margin-bottom:18px;
}
.scene-card h3{font-size:19px;color:var(--c-primary);margin-bottom:10px;}
.scene-card p{font-size:15px;color:var(--c-text-2);flex:1;}
.card-link{font-size:14.5px;font-weight:600;color:var(--c-accent);display:inline-flex;align-items:center;gap:6px;}
.card-link:hover{text-decoration:none;color:#c94815;}
.card-link i{transition:transform .3s ease;}
.card-link:hover i{transform:translateX(3px);}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:920px;}
.accordion-item{
  background:transparent;border:none;border-bottom:1px solid var(--c-line);
}
.accordion-button{
  background:transparent;box-shadow:none;font-size:17px;font-weight:600;color:var(--c-text);
  padding:22px 44px 22px 0;border-radius:0;position:relative;
}
.accordion-button:not(.collapsed){color:var(--c-primary);background:transparent;box-shadow:none;}
.accordion-button:focus{box-shadow:none;outline:2px solid var(--c-accent);outline-offset:-2px;}
.accordion-button::after{
  content:"+";font-size:22px;font-weight:400;color:var(--c-accent);
  background-image:none;width:auto;height:auto;line-height:1;transform:none;
  transition:transform .3s ease;position:absolute;right:6px;top:50%;margin-top:-13px;
}
.accordion-button:not(.collapsed)::after{content:"+";transform:rotate(135deg);}
.accordion-body{
  padding:0 30px 24px 20px;color:var(--c-text-2);font-size:15.5px;line-height:1.85;
  border-left:3px solid var(--c-accent);margin-left:0;
}
.accordion-button:not(.collapsed)::before{
  content:"";position:absolute;left:0;top:22px;bottom:22px;width:3px;background:var(--c-accent);border-radius:2px;
}

/* ---------- 站内跳转卡 ---------- */
.jump-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.jump-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--shadow-1);transition:transform .3s ease,box-shadow .3s ease;display:block;
}
.jump-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);text-decoration:none;}
.jump-card img{width:100%;height:150px;border-radius:var(--r-img);margin-bottom:16px;}
.jump-card .tag{
  display:inline-block;background:rgba(18,59,50,.08);color:var(--c-primary);
  font-size:12px;padding:3px 11px;border-radius:999px;margin-bottom:10px;
}
.jump-card h3{font-size:17px;color:var(--c-primary);margin-bottom:8px;line-height:1.5;}
.jump-card p{font-size:14px;color:var(--c-text-2);margin:0;}
.back-top{
  display:inline-flex;align-items:center;gap:8px;margin-top:40px;font-size:14.5px;font-weight:600;
  color:var(--c-primary);border:1.5px solid var(--c-primary);border-radius:999px;padding:10px 22px;
  transition:background-color .3s ease,transform .3s ease;
}
.back-top:hover{background:rgba(18,59,50,.08);text-decoration:none;transform:translateY(-2px);}

/* ---------- CTA 条 ---------- */
.cta-band{
  background:linear-gradient(100deg,var(--c-primary) 0%,var(--c-primary-deep) 100%);
  border-radius:var(--r-card);padding:52px 44px;display:flex;align-items:center;
  justify-content:space-between;gap:36px;flex-wrap:wrap;position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-60px;width:240px;height:240px;border-radius:50%;
  background:rgba(201,242,107,.08);
}
.cta-band h2{color:#fff;font-size:clamp(22px,2.4vw,29px);margin-bottom:12px;position:relative;z-index:2;}
.cta-band p{color:rgba(255,255,255,.76);margin:0;max-width:600px;font-size:15.5px;position:relative;z-index:2;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;position:relative;z-index:2;}
.btn-main{
  display:inline-flex;align-items:center;gap:8px;background:var(--c-accent);color:#fff;
  font-weight:600;font-size:15.5px;padding:13px 28px;border-radius:999px;border:1.5px solid transparent;
  transition:background-color .3s ease,transform .3s ease,box-shadow .3s ease;
}
.btn-main:hover{background:#c94815;color:#fff;text-decoration:none;transform:translateY(-2px);box-shadow:var(--shadow-2);}
.btn-main:active{transform:translateY(0);}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;background:transparent;color:var(--c-primary);
  font-weight:600;font-size:15.5px;padding:13px 28px;border-radius:999px;border:1.5px solid var(--c-primary);
  transition:background-color .3s ease,transform .3s ease,color .3s ease;
}
.btn-ghost:hover{background:rgba(18,59,50,.08);color:var(--c-primary);text-decoration:none;transform:translateY(-2px);}
.btn-ghost.on-dark{color:#fff;border-color:rgba(255,255,255,.6);}
.btn-ghost.on-dark:hover{background:rgba(255,255,255,.12);color:#fff;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--c-primary-deep);color:rgba(255,255,255,.8);
  border-top:1px solid rgba(201,242,107,.08);margin-top:88px;padding:64px 0 28px;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:40px;}
.site-footer .brand-main{color:#fff;font-size:19px;}
.site-footer .brand-sub{color:rgba(255,255,255,.55);}
.site-footer .brand{margin-bottom:16px;}
.site-footer p{font-size:14.5px;line-height:1.85;color:rgba(255,255,255,.66);margin:0;}
.footer-title{font-size:15px;font-weight:700;color:#fff;margin-bottom:18px;letter-spacing:.03em;}
.footer-links li{margin-bottom:11px;}
.footer-links a{color:rgba(255,255,255,.72);font-size:14.5px;transition:color .3s ease,transform .3s ease;display:inline-block;}
.footer-links a:hover{color:var(--c-signal);transform:translateX(2px);text-decoration:none;}
.footer-contact li{display:flex;gap:10px;font-size:14.5px;color:rgba(255,255,255,.72);margin-bottom:13px;line-height:1.7;}
.footer-contact i{color:var(--c-signal);margin-top:5px;flex-shrink:0;font-size:13px;}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13.5px;color:rgba(255,255,255,.56);
}
.footer-bottom a{color:rgba(255,255,255,.72);}
.footer-bottom a:hover{color:var(--c-signal);text-decoration:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .main-nav a{font-size:14.5px;padding:8px 11px;}
  .nav-search input{width:96px;}
  .section{padding:70px 0;}
  .row-item{gap:34px;}
  .stat-band{grid-template-columns:repeat(2,1fr);gap:24px 0;}
  .stat-item:nth-child(2){border-right:none;}
}
@media (max-width:991.98px){
  .main-nav{display:none;}
  .nav-side{display:none;}
  .nav-toggle{display:flex;margin-left:auto;}
  .nav-wrap{gap:16px;}
  .cat-hero{min-height:auto;}
  .row-item{grid-template-columns:1fr;gap:24px;padding:36px 0;}
  .row-item.flip .media{order:1;}
  .row-item.flip .body{order:2;}
  .row-item .media img{height:240px;}
  .step-grid{grid-template-columns:repeat(2,1fr);}
  .scene-grid{grid-template-columns:repeat(2,1fr);}
  .jump-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
  .cta-band{padding:40px 30px;}
}
@media (max-width:767.98px){
  body{font-size:16px;}
  .container{padding:0 20px;}
  .section{padding:52px 0;}
  .stat-band{padding:24px 18px;margin-top:-28px;grid-template-columns:1fr;gap:20px;}
  .stat-item{padding:0;border-right:none;border-bottom:1px solid var(--c-line);padding-bottom:16px;}
  .stat-item:last-child{border-bottom:none;padding-bottom:0;}
  .step-grid,.scene-grid,.jump-grid{grid-template-columns:1fr;}
  .step-band{padding:38px 22px;}
  .cta-band{padding:34px 24px;flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn-main,.cta-actions .btn-ghost{flex:1 1 100%;justify-content:center;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .anchor-nav a{font-size:13.5px;padding:7px 14px;}
}
@media (max-width:575.98px){
  .cat-hero .container{padding-top:38px;padding-bottom:38px;}
  .hero-tags span{font-size:12px;padding:4px 11px;}
  .accordion-button{font-size:16px;padding-right:38px;}
  .accordion-body{padding-left:16px;padding-right:12px;font-size:15px;}
}

/* roulang page: article */
:root{
  --c-primary:#123B32;
  --c-primary-deep:#0E2B24;
  --c-accent:#E2571F;
  --c-signal:#C9F26B;
  --c-bg:#F6F4EF;
  --c-surface:#FFFFFF;
  --c-line:#E4E1D8;
  --c-text:#1A1D1B;
  --c-text-2:#5C635E;
  --c-muted:#9AA09B;
  --radius-card:16px;
  --radius-img:13px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(18,59,50,.06),0 8px 24px -12px rgba(18,59,50,.18);
  --shadow-2:0 2px 4px rgba(18,59,50,.08),0 18px 40px -16px rgba(18,59,50,.28);
  --bs-primary:#123B32;
  --bs-body-bg:#F6F4EF;
  --bs-body-color:#1A1D1B;
  --bs-link-color:#123B32;
  --bs-link-hover-color:#E2571F;
  --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16.5px;
  line-height:1.8;
  text-align:left;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--c-primary);text-decoration:none;text-underline-offset:3px;transition:color .3s ease,background-color .3s ease,transform .3s ease}
a:hover{color:var(--c-accent);text-decoration:underline}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px}
ul,ol{padding-left:1.1em}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;letter-spacing:-0.01em}
p{margin:0 0 1.1em}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
.num{font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;gap:8px;border-radius:var(--radius-pill);font-weight:600;font-size:15.5px;padding:12px 26px;border:1.5px solid transparent;cursor:pointer;transition:all .3s ease;min-height:44px;line-height:1.2}
.btn-primary{background:var(--c-accent);color:#fff;border-color:var(--c-accent)}
.btn-primary:hover,.btn-primary:focus{background:#c94814;border-color:#c94814;color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-2);text-decoration:none}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:transparent;color:var(--c-primary);border-color:var(--c-primary)}
.btn-ghost:hover,.btn-ghost:focus{background:rgba(18,59,50,.08);color:var(--c-primary);text-decoration:none;transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{padding:9px 18px;font-size:14px;min-height:38px}
.link-more{font-weight:600;font-size:14px;color:var(--c-primary)}
.link-more:hover{color:var(--c-accent)}
.link-more i{transition:transform .3s ease;font-size:12px}
.link-more:hover i{transform:translateX(2px)}

/* ============ 徽章 ============ */
.badge-soft{display:inline-block;background:rgba(18,59,50,.08);color:var(--c-primary);font-size:12px;font-weight:600;padding:4px 12px;border-radius:var(--radius-pill);letter-spacing:.04em}
.badge-signal{display:inline-block;background:var(--c-signal);color:#1A1D1B;font-size:12px;font-weight:700;padding:4px 12px;border-radius:var(--radius-pill)}
.badge-accent{display:inline-block;background:var(--c-accent);color:#fff;font-size:12px;font-weight:700;padding:4px 12px;border-radius:var(--radius-pill)}

/* ============ 导航 ============ */
.site-header{position:sticky;top:0;z-index:1030;background:rgba(246,244,239,.88);backdrop-filter:blur(10px);border-bottom:1px solid var(--c-line)}
.nav-wrap{display:flex;align-items:center;height:68px;gap:20px}
.brand{display:flex;flex-direction:column;line-height:1.15;text-decoration:none}
.brand:hover{text-decoration:none}
.brand-main{font-size:19px;font-weight:800;color:var(--c-primary);letter-spacing:-0.01em}
.brand-sub{font-size:12px;letter-spacing:.1em;color:var(--c-text-2);margin-top:2px}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:22px}
.main-nav a{font-size:15px;font-weight:600;color:var(--c-text-2);padding:8px 14px;border-radius:var(--radius-pill);transition:all .3s ease}
.main-nav a:hover{color:var(--c-primary);background:rgba(18,59,50,.07);text-decoration:none}
.main-nav a.active{color:var(--c-primary);background:rgba(18,59,50,.1)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:14px;align-self:stretch;background:var(--c-primary);padding:0 20px;border-radius:0 0 0 0}
.nav-search{display:flex;align-items:center;gap:8px;color:rgba(246,244,239,.75);font-size:14px;padding:8px 14px;border:1px solid rgba(246,244,239,.25);border-radius:var(--radius-pill)}
.nav-search i{font-size:13px}
.nav-cta{background:var(--c-accent);color:#fff;border-color:var(--c-accent);padding:10px 22px;font-size:15px}
.nav-cta:hover{background:#c94814;color:#fff}
.nav-toggle{display:none;background:transparent;border:1px solid var(--c-line);border-radius:12px;width:44px;height:40px;font-size:17px;color:var(--c-primary);margin-left:auto}
.nav-toggle:hover{background:rgba(18,59,50,.07)}
.mobile-drawer{position:fixed;top:0;right:0;width:290px;height:100%;background:var(--c-primary);z-index:1055;transform:translateX(102%);transition:transform .35s ease;display:flex;flex-direction:column;padding:22px}
.mobile-drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:flex-start;justify-content:space-between;border-bottom:1px solid rgba(246,244,239,.18);padding-bottom:16px}
.mobile-drawer .brand-main{color:#F6F4EF}
.mobile-drawer .brand-sub{color:rgba(246,244,239,.6)}
.drawer-close{background:transparent;border:0;color:#F6F4EF;font-size:20px;padding:4px 8px}
.drawer-nav{display:flex;flex-direction:column;margin-top:14px;flex:1}
.drawer-nav a{color:rgba(246,244,239,.88);font-size:17px;line-height:2.6;border-bottom:1px solid rgba(246,244,239,.1)}
.drawer-nav a:hover{color:var(--c-signal);text-decoration:none}
.drawer-cta{margin-top:18px;justify-content:center}
.drawer-mask{position:fixed;inset:0;background:rgba(14,43,36,.45);opacity:0;visibility:hidden;transition:opacity .3s ease;z-index:1050}
.drawer-mask.open{opacity:1;visibility:visible}

/* ============ 文章头部 ============ */
.article-hero{
  position:relative;
  color:#F6F4EF;
  padding:104px 0 56px;
  background:
    linear-gradient(135deg,rgba(18,59,50,.92) 0%,rgba(14,43,36,.9) 55%,rgba(18,59,50,.84) 100%),
    url(/assets/images/backpic/back-2.png) center/cover no-repeat;
}
.breadcrumb-trail{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(246,244,239,.72);margin-bottom:22px}
.breadcrumb-trail a{color:rgba(246,244,239,.85)}
.breadcrumb-trail a:hover{color:var(--c-signal);text-decoration:none}
.breadcrumb-trail .sep{color:rgba(246,244,239,.4)}
.breadcrumb-trail .current{color:rgba(246,244,239,.62)}
.article-hero h1{font-size:clamp(28px,3.6vw,42px);line-height:1.25;font-weight:800;letter-spacing:-0.01em;max-width:900px;color:#fff}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:22px;font-size:14px;color:rgba(246,244,239,.78)}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:rgba(246,244,239,.5);display:inline-block}
.article-meta .m-badge{background:var(--c-signal);color:#12241F;font-weight:700;font-size:12px;padding:4px 12px;border-radius:var(--radius-pill)}
.article-lead{margin-top:20px;max-width:760px;font-size:16.5px;line-height:1.85;color:rgba(246,244,239,.86)}

/* ============ 主体布局 ============ */
.article-main{padding:64px 0 88px}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 336px;gap:44px;align-items:start}
.panel{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);padding:32px 36px}
.article-body{max-width:72ch;font-size:17px;line-height:1.9;color:#22261F}
.article-body h2{
  font-size:26px;font-weight:700;margin:2.2em 0 .8em;padding-left:14px;
  border-left:6px solid var(--c-accent);line-height:1.4;
}
.article-body h3{font-size:20px;font-weight:600;margin:1.6em 0 .6em;color:var(--c-primary)}
.article-body p{margin:0 0 1.15em}
.article-body ul,.article-body ol{margin:0 0 1.15em;padding-left:1.2em}
.article-body li{margin-bottom:.6em}
.article-body blockquote{
  margin:1.6em 0;padding:16px 22px;background:#FBF7EE;border-left:3px solid var(--c-accent);
  border-radius:0 12px 12px 0;color:#3C423C;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--radius-img);margin:1.4em 0 .6em;object-fit:cover;width:100%}
.article-body table{width:100%;border-collapse:collapse;margin:1.5em 0;font-size:15.5px}
.article-body th,.article-body td{padding:11px 12px;border-bottom:1px solid var(--c-line);text-align:left}
.article-body th{font-weight:700;color:var(--c-primary);background:rgba(18,59,50,.04)}
.article-body a{font-weight:600;border-bottom:1px solid rgba(18,59,50,.28)}
.article-body a:hover{border-bottom-color:var(--c-accent)}
.empty-state{text-align:center;padding:56px 20px;color:var(--c-text-2)}
.empty-state i{font-size:36px;color:var(--c-primary);opacity:.5;display:block;margin-bottom:16px}
.empty-state h2{font-size:20px;color:var(--c-text);margin-bottom:10px}

/* ============ 侧栏 ============ */
.sidebar{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
.side-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);padding:22px 22px 18px;transition:box-shadow .3s ease,transform .3s ease}
.side-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px)}
.side-title{font-size:15px;font-weight:700;color:var(--c-primary);display:flex;align-items:center;gap:8px;margin-bottom:14px}
.side-title::before{content:"";width:5px;height:16px;background:var(--c-accent);border-radius:2px;display:inline-block}
.side-list{list-style:none;margin:0;padding:0}
.side-list li{border-bottom:1px dashed var(--c-line);padding:9px 0}
.side-list li:last-child{border-bottom:0;padding-bottom:0}
.side-list a{display:flex;gap:8px;font-size:14px;line-height:1.6;color:var(--c-text-2);transition:all .3s ease}
.side-list a:hover{color:var(--c-accent);transform:translateX(2px);text-decoration:none}
.toc-list{list-style:none;margin:0;padding:0;counter-reset:toc}
.toc-list li{margin-bottom:8px}
.toc-list a{font-size:14px;color:var(--c-text-2);display:block;line-height:1.55}
.toc-list a:hover{color:var(--c-accent);text-decoration:none;transform:translateX(2px)}
.side-card.dark{background:var(--c-primary-deep);border-color:var(--c-primary-deep);color:rgba(246,244,239,.88)}
.side-card.dark .side-title{color:#F6F4EF}
.side-card.dark .side-title::before{background:var(--c-signal)}
.side-card.dark p{font-size:14px;line-height:1.7;color:rgba(246,244,239,.72);margin-bottom:14px}
.side-card.dark a.btn-primary{background:var(--c-accent);color:#fff}
.side-card.dark a.btn-primary:hover{background:#c94814;color:#fff;text-decoration:none}

/* ============ 标签与推荐 ============ */
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:36px;padding-top:26px;border-top:1px solid var(--c-line)}
.tag-row .tag-label{font-size:14px;color:var(--c-text-2);font-weight:600}
.tag{display:inline-block;font-size:13px;color:var(--c-primary);background:rgba(18,59,50,.07);padding:5px 14px;border-radius:var(--radius-pill);transition:all .3s ease}
.tag:hover{background:var(--c-accent);color:#fff;text-decoration:none}
.section-block{padding:0 0 72px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px}
.section-kicker{font-size:12px;letter-spacing:.14em;color:var(--c-accent);font-weight:700;display:block;margin-bottom:10px}
.section-head h2{font-size:clamp(24px,2.6vw,30px);font-weight:700;position:relative;padding-left:16px}
.section-head h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:6px;background:var(--c-accent);border-radius:3px}
.card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);overflow:hidden;transition:transform .3s ease,box-shadow .3s ease;height:100%}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.card-thumb{aspect-ratio:16/9;overflow:hidden}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.card:hover .card-thumb img{transform:scale(1.04)}
.card-body{padding:20px 22px 22px}
.card-body h3{font-size:18px;font-weight:600;line-height:1.45;margin:12px 0 10px;color:var(--c-text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card:hover .card-body h3{color:var(--c-primary)}
.card-body p{font-size:14px;line-height:1.7;color:var(--c-text-2);margin-bottom:14px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--c-muted)}
.back-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:8px}

/* ============ FAQ ============ */
.faq-wrap{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);padding:14px 28px}
.accordion-item{background:transparent;border:0;border-bottom:1px solid var(--c-line)}
.accordion-item:last-child{border-bottom:0}
.accordion-button{background:transparent;color:var(--c-text);font-size:17px;font-weight:600;padding:20px 0 20px 0;box-shadow:none!important;border-left:3px solid transparent;padding-left:0;transition:all .3s ease}
.accordion-button:not(.collapsed){color:var(--c-primary);border-left:3px solid var(--c-accent);padding-left:16px}
.accordion-button::after{background-image:none;content:"\2b";font-family:"Font Awesome 6 Free","Font Awesome 6 Brands",sans-serif;font-weight:900;font-size:15px;color:var(--c-primary);width:auto;height:auto;transform:none;transition:transform .3s ease;line-height:1}
.accordion-button:not(.collapsed)::after{content:"\f068";transform:rotate(180deg);color:var(--c-accent)}
.accordion-body{padding:0 0 22px 20px;color:var(--c-text-2);line-height:1.85;font-size:15.5px}

/* ============ CTA ============ */
.cta-band{
  background:linear-gradient(120deg,var(--c-primary-deep) 0%,var(--c-primary) 100%);
  border-radius:20px;padding:44px 48px;display:flex;flex-wrap:wrap;align-items:center;
  justify-content:space-between;gap:24px;color:#F6F4EF;position:relative;overflow:hidden;
}
.cta-band::after{content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;background:rgba(201,242,107,.12)}
.cta-band h2{font-size:clamp(22px,2.4vw,28px);color:#fff;margin-bottom:10px}
.cta-band p{margin:0;font-size:15px;color:rgba(246,244,239,.78);max-width:620px}
.cta-band .btn{position:relative;z-index:1}
.cta-section{padding:0 0 88px}

/* ============ 页脚 ============ */
.site-footer{background:#0E2B24;color:rgba(246,244,239,.8);border-top:1px solid rgba(201,242,107,.08);padding:64px 0 24px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px}
.footer-brand .brand-main{color:#F6F4EF;font-size:20px}
.footer-brand .brand-sub{color:rgba(246,244,239,.6)}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(246,244,239,.66);margin-top:16px;max-width:340px}
.footer-title{font-size:15px;font-weight:700;color:#F6F4EF;margin-bottom:16px}
.footer-links{list-style:none;margin:0;padding:0}
.footer-links li{margin-bottom:10px}
.footer-links a{font-size:14px;color:rgba(246,244,239,.72);transition:all .3s ease}
.footer-links a:hover{color:var(--c-signal);transform:translateX(2px);text-decoration:none}
.footer-contact{list-style:none;margin:0;padding:0}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:rgba(246,244,239,.72);margin-bottom:12px;line-height:1.6}
.footer-contact i{color:var(--c-signal);font-size:13px;margin-top:5px}
.footer-bottom{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;border-top:1px solid rgba(246,244,239,.12);margin-top:44px;padding-top:20px;font-size:13px;color:rgba(246,244,239,.6)}
.footer-bottom a{color:rgba(246,244,239,.7)}
.footer-bottom a:hover{color:var(--c-signal)}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .layout{grid-template-columns:minmax(0,1fr) 296px;gap:32px}
  .article-hero{padding:92px 0 48px}
}
@media (max-width:991.98px){
  .main-nav{display:none}
  .nav-search{display:none}
  .nav-right{background:transparent;padding:0;align-self:center;gap:10px}
  .nav-cta{display:inline-flex}
  .nav-toggle{display:block;order:3}
  .nav-wrap{gap:14px}
  .layout{grid-template-columns:1fr}
  .sidebar{position:static;order:2}
  .panel{padding:26px 22px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .cta-band{padding:34px 28px}
  .article-body{font-size:16.5px}
}
@media (max-width:767.98px){
  .container{padding:0 20px}
  .article-hero{padding:84px 0 40px}
  .article-main{padding:44px 0 64px}
  .section-block{padding:0 0 52px}
  .cta-section{padding:0 0 64px}
  .faq-wrap{padding:6px 20px}
  .article-body h2{font-size:22px}
  .article-body h3{font-size:18.5px}
  .cta-band{flex-direction:column;align-items:flex-start}
  .cta-band .btn{width:100%;justify-content:center}
  .back-row .btn{width:100%;justify-content:center}
  .site-footer{padding:48px 0 20px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column}
}
@media (max-width:519.98px){
  body{font-size:16px}
  .brand-main{font-size:17px}
  .nav-cta{display:none}
  .article-hero h1{font-size:24px}
  .section-head{flex-direction:column;align-items:flex-start}
}

/* roulang page: category2 */
:root{
  --c-primary:#123B32;
  --c-primary-deep:#0E2B24;
  --c-accent:#E2571F;
  --c-signal:#C9F26B;
  --c-bg:#F6F4EF;
  --c-surface:#FFFFFF;
  --c-line:#E4E1D8;
  --c-text:#1A1D1B;
  --c-text-2:#5C635E;
  --c-soft:#F1EFE8;
  --radius-card:16px;
  --radius-img:12px;
  --shadow-1:0 1px 2px rgba(18,59,50,.06),0 8px 24px -12px rgba(18,59,50,.18);
  --shadow-2:0 2px 4px rgba(18,59,50,.08),0 18px 40px -16px rgba(18,59,50,.28);
  --bs-primary:var(--c-primary);
  --bs-body-bg:var(--c-bg);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:100px}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",sans-serif;
  background:var(--c-bg);
  color:var(--c-text);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius-img);object-fit:cover}
a{color:var(--c-primary);text-decoration:none;text-underline-offset:3px;transition:color .3s ease,background-color .3s ease,transform .3s ease}
a:hover{color:var(--c-accent);text-decoration:underline}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px}
h1,h2,h3{margin:0;line-height:1.3;letter-spacing:-.01em}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}

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

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(246,244,239,.88);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--c-line);
}
.nav-split{
  display:flex;
  align-items:stretch;
  min-height:68px;
}
.nav-left{
  flex:0 0 58%;
  display:flex;
  align-items:center;
  gap:28px;
  padding:0 24px;
  min-width:0;
}
.brand{display:flex;flex-direction:column;line-height:1.15;flex-shrink:0}
.brand:hover{text-decoration:none}
.brand-main{font-size:18px;font-weight:800;color:var(--c-primary);letter-spacing:.02em}
.brand-sub{font-size:12px;letter-spacing:.1em;color:var(--c-text-2)}
.main-nav{display:flex;align-items:center;gap:4px;min-width:0}
.main-nav a{
  position:relative;
  padding:9px 14px;
  border-radius:999px;
  font-size:15px;
  color:var(--c-text);
  white-space:nowrap;
  transition:background-color .3s ease,color .3s ease;
}
.main-nav a:hover{background:rgba(18,59,50,.07);color:var(--c-primary);text-decoration:none}
.main-nav a.active{color:var(--c-primary);font-weight:700;background:rgba(18,59,50,.08)}
.main-nav a.active::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:2px;
  height:2px;
  border-radius:2px;
  background:var(--c-accent);
}
.nav-right{
  flex:1 1 auto;
  background:var(--c-primary);
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:16px;
  padding:0 28px;
}
.nav-search{
  display:flex;
  align-items:center;
  gap:10px;
  min-width:220px;
  padding:8px 16px;
  border-radius:999px;
  background:rgba(255,255,255,.12);
  color:rgba(255,255,255,.86);
  font-size:14px;
  cursor:text;
}
.nav-search i{color:var(--c-signal);font-size:13px}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:999px;
  font-weight:600;
  font-size:15px;
  padding:12px 26px;
  border:1.5px solid transparent;
  cursor:pointer;
  transition:transform .3s ease,box-shadow .3s ease,background-color .3s ease,color .3s ease,filter .3s ease;
  min-height:44px;
}
.btn-accent{background:var(--c-accent);color:#fff}
.btn-accent:hover{background:var(--c-accent);filter:brightness(.94);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-2);text-decoration:none}
.btn-accent:active{transform:translateY(0);box-shadow:none}
.btn-outline{background:transparent;border-color:var(--c-primary);color:var(--c-primary)}
.btn-outline:hover{background:rgba(18,59,50,.08);color:var(--c-primary);transform:translateY(-2px);text-decoration:none}
.btn-outline:active{transform:translateY(0)}
.btn-light{background:#fff;color:var(--c-primary)}
.btn-light:hover{background:#fff;color:var(--c-accent);transform:translateY(-2px);box-shadow:var(--shadow-2);text-decoration:none}
.btn-sm{padding:9px 20px;font-size:14px;min-height:40px}
.nav-toggle{
  display:none;
  margin-left:auto;
  width:44px;height:44px;
  border-radius:12px;
  border:1px solid var(--c-line);
  background:#fff;
  color:var(--c-primary);
  font-size:18px;
  align-items:center;
  justify-content:center;
}
.nav-toggle:hover{background:var(--c-soft)}

/* ---------- 移动抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;
  background:rgba(14,43,36,.5);
  opacity:0;visibility:hidden;
  transition:opacity .3s ease,visibility .3s ease;
  z-index:1040;
}
.drawer-mask.show{opacity:1;visibility:visible}
.mobile-drawer{
  position:fixed;
  top:0;right:0;
  width:min(86vw,360px);
  height:100%;
  background:var(--c-primary-deep);
  z-index:1050;
  transform:translateX(102%);
  transition:transform .35s ease;
  display:flex;
  flex-direction:column;
  padding:22px 22px 28px;
}
.mobile-drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}
.drawer-head .brand-main{color:#fff;font-size:17px}
.drawer-head .brand-sub{color:rgba(246,244,239,.6)}
.drawer-close{
  width:40px;height:40px;
  border-radius:12px;
  border:1px solid rgba(255,255,255,.22);
  background:transparent;
  color:#fff;
  font-size:20px;
  line-height:1;
}
.drawer-close:hover{background:rgba(255,255,255,.1)}
.drawer-nav{display:flex;flex-direction:column;gap:2px}
.drawer-nav a{
  color:rgba(246,244,239,.86);
  font-size:17px;
  line-height:2.6;
  padding:0 6px;
  border-bottom:1px solid rgba(255,255,255,.08);
  border-radius:0;
}
.drawer-nav a:hover,.drawer-nav a.active{color:var(--c-signal);text-decoration:none;background:transparent}
.drawer-cta{margin-top:auto}

/* ---------- 页头 ---------- */
.page-hero{
  position:relative;
  padding:76px 0 68px;
  min-height:300px;
  display:flex;
  align-items:center;
  color:#fff;
  background:
    linear-gradient(120deg,rgba(14,43,36,.95) 0%,rgba(18,59,50,.86) 55%,rgba(18,59,50,.78) 100%),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat;
}
.crumbs{font-size:13px;color:rgba(246,244,239,.7);margin-bottom:18px}
.crumbs a{color:rgba(246,244,239,.82)}
.crumbs a:hover{color:var(--c-signal)}
.crumbs span{margin:0 8px;opacity:.6}
.hero-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border-radius:999px;
  background:rgba(201,242,107,.14);
  border:1px solid rgba(201,242,107,.35);
  color:var(--c-signal);
  font-size:12px;
  letter-spacing:.12em;
  margin-bottom:18px;
}
.page-hero h1{
  font-size:clamp(30px,4.2vw,48px);
  font-weight:800;
  margin-bottom:16px;
}
.page-hero h1 .h1-sub{
  display:block;
  font-size:clamp(15px,1.6vw,19px);
  font-weight:500;
  color:rgba(246,244,239,.78);
  letter-spacing:.04em;
  margin-top:12px;
}
.hero-lead{
  max-width:760px;
  font-size:17px;
  line-height:1.85;
  color:rgba(246,244,239,.84);
  margin:0;
}

/* ---------- 主体 ---------- */
.section{padding:80px 0 8px}
.section-head{margin-bottom:44px}
.section-num{
  display:block;
  font-size:12px;
  letter-spacing:.14em;
  color:var(--c-accent);
  font-weight:700;
  margin-bottom:10px;
}
.section-head h2{
  position:relative;
  font-size:clamp(24px,2.6vw,32px);
  font-weight:700;
  padding-left:16px;
}
.section-head h2::before{
  content:"";
  position:absolute;
  left:0;top:6px;
  width:6px;height:22px;
  border-radius:3px;
  background:var(--c-accent);
}
.section-head p{margin-top:12px;color:var(--c-text-2);font-size:15.5px;max-width:720px}

/* 目录 */
.toc-card{
  position:sticky;
  top:92px;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--radius-card);
  padding:22px 18px;
  box-shadow:var(--shadow-1);
}
.toc-title{font-size:15px;font-weight:700;margin-bottom:14px;color:var(--c-primary)}
.toc-list a{
  display:flex;
  gap:10px;
  align-items:baseline;
  padding:9px 10px;
  border-radius:10px;
  font-size:14.5px;
  color:var(--c-text-2);
  transition:transform .3s ease,background-color .3s ease,color .3s ease;
}
.toc-list a:hover{background:var(--c-soft);color:var(--c-primary);transform:translateX(2px);text-decoration:none}
.toc-list .num{font-size:12px;color:var(--c-accent);font-weight:700;font-variant-numeric:tabular-nums}
.toc-card .btn{width:100%;margin-top:18px}

/* 分段卡片流 */
.flow-card{
  position:relative;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--radius-card);
  padding:30px 32px;
  margin-bottom:24px;
  box-shadow:var(--shadow-1);
  transition:transform .3s ease,box-shadow .3s ease;
  scroll-margin-top:100px;
}
.flow-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.flow-card::before{
  content:"";
  position:absolute;
  left:0;top:38px;
  width:4px;height:28px;
  border-radius:0 4px 4px 0;
  background:var(--c-accent);
}
.flow-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.flow-num{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:38px;height:26px;
  padding:0 10px;
  border-radius:999px;
  background:var(--c-accent);
  color:#fff;
  font-size:12.5px;
  font-weight:700;
  font-variant-numeric:tabular-nums;
}
.flow-card h2{font-size:22px;font-weight:700}
.flow-card p{color:var(--c-text-2);font-size:15.5px}
.point-list{margin-top:16px}
.point-list li{
  position:relative;
  padding-left:26px;
  margin-bottom:10px;
  font-size:15px;
  color:var(--c-text-2);
}
.point-list li:last-child{margin-bottom:0}
.point-list li::before{
  content:"\f00c";
  font-family:"Font Awesome 6 Free";
  font-weight:900;
  position:absolute;
  left:0;top:3px;
  font-size:12px;
  color:var(--c-accent);
}
.flow-foot{margin-top:20px;padding-top:18px;border-top:1px dashed var(--c-line)}
.link-more{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:15px}
.link-more i{transition:transform .3s ease}
.link-more:hover i{transform:translateX(3px)}

/* 图文带 */
.visual-band{
  display:grid;
  grid-template-columns:1.05fr 1fr;
  align-items:stretch;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--radius-card);
  overflow:hidden;
  margin-bottom:24px;
  box-shadow:var(--shadow-1);
  transition:transform .3s ease,box-shadow .3s ease;
}
.visual-band:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.visual-band img{width:100%;height:100%;min-height:280px;border-radius:0}
.visual-band .band-body{padding:32px 34px;display:flex;flex-direction:column;justify-content:center}
.visual-band h2{font-size:22px;font-weight:700;margin-bottom:12px}
.visual-band p{color:var(--c-text-2);font-size:15.5px}
.step-list{margin-top:18px;counter-reset:step}
.step-list li{
  position:relative;
  padding-left:34px;
  margin-bottom:12px;
  font-size:15px;
  color:var(--c-text-2);
  counter-increment:step;
}
.step-list li::before{
  content:counter(step);
  position:absolute;
  left:0;top:3px;
  width:22px;height:22px;
  border-radius:50%;
  border:1.5px solid var(--c-primary);
  color:var(--c-primary);
  font-size:12px;
  font-weight:700;
  display:flex;
  align-items:center;
  justify-content:center;
}

/* 指标带 */
.metrics-band{
  background:linear-gradient(115deg,var(--c-primary) 0%,var(--c-primary-deep) 100%);
  border-radius:var(--radius-card);
  padding:32px 34px;
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
  margin-bottom:24px;
  color:#fff;
}
.metric-num{
  font-size:30px;
  font-weight:800;
  color:var(--c-signal);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
  line-height:1.2;
}
.metric-label{font-size:13.5px;color:rgba(246,244,239,.78);margin-top:6px}

/* FAQ */
.section-faq{padding:88px 0 0}
.accordion-item{
  background:transparent;
  border:0;
  border-bottom:1px solid var(--c-line);
}
.accordion-button{
  background:transparent;
  color:var(--c-text);
  font-size:17px;
  font-weight:600;
  padding:20px 48px 20px 18px;
  box-shadow:none;
  transition:background-color .3s ease,color .3s ease,box-shadow .3s ease;
}
.accordion-button:hover{background:rgba(18,59,50,.04);color:var(--c-primary)}
.accordion-button:not(.collapsed){
  color:var(--c-primary);
  background:transparent;
  box-shadow:inset 3px 0 0 var(--c-accent);
}
.accordion-button:focus{box-shadow:inset 3px 0 0 var(--c-accent)}
.accordion-button::after{
  content:"+";
  background-image:none;
  font-size:22px;
  font-weight:400;
  color:var(--c-accent);
  width:24px;height:24px;
  display:flex;
  align-items:center;
  justify-content:center;
  transition:transform .3s ease,content .3s ease;
}
.accordion-button:not(.collapsed)::after{
  content:"−";
  background-image:none;
  transform:rotate(180deg);
}
.accordion-body{
  padding:0 20px 22px 21px;
  color:var(--c-text-2);
  font-size:15.5px;
  line-height:1.85;
}
.accordion-body p{margin:0}

/* 跳转卡 */
.jump-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:8px}
.jump-card{
  display:flex;
  gap:20px;
  align-items:center;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--radius-card);
  padding:20px;
  box-shadow:var(--shadow-1);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.jump-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(226,87,31,.4);text-decoration:none}
.jump-card img{width:112px;height:88px;flex-shrink:0;border-radius:var(--radius-img)}
.jump-card h3{font-size:17px;font-weight:700;color:var(--c-text);margin-bottom:6px}
.jump-card p{font-size:14px;color:var(--c-text-2);margin:0}
.jump-card:hover h3{color:var(--c-accent)}

/* CTA */
.section-cta{padding:88px 0 0}
.cta-band{
  background:linear-gradient(115deg,var(--c-primary) 0%,var(--c-primary-deep) 100%);
  border-radius:20px;
  padding:44px 46px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  color:#fff;
}
.cta-band h2{font-size:clamp(22px,2.4vw,28px);font-weight:700;color:#fff;margin-bottom:10px}
.cta-band p{color:rgba(246,244,239,.82);font-size:15.5px;margin:0;max-width:620px}
.cta-actions{display:flex;gap:14px;flex-shrink:0;flex-wrap:wrap}
.cta-band .btn-outline{border-color:rgba(246,244,239,.6);color:#F6F4EF}
.cta-band .btn-outline:hover{background:rgba(255,255,255,.12);color:#fff}

/* 返回顶部 */
.to-top{
  position:fixed;
  right:24px;bottom:28px;
  width:48px;height:48px;
  border-radius:50%;
  border:1px solid var(--c-line);
  background:#fff;
  color:var(--c-primary);
  box-shadow:var(--shadow-1);
  display:flex;
  align-items:center;
  justify-content:center;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:all .3s ease;
  z-index:1020;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--c-primary);color:#fff;border-color:var(--c-primary)}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:96px;
  background:var(--c-primary-deep);
  color:rgba(246,244,239,.8);
  padding:64px 0 28px;
  border-top:1px solid rgba(201,242,107,.18);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;
}
.footer-brand .brand{margin-bottom:16px}
.footer-brand .brand-main{color:#F6F4EF;font-size:18px}
.footer-brand .brand-sub{color:rgba(246,244,239,.55)}
.footer-brand p{font-size:14px;line-height:1.85;color:rgba(246,244,239,.68);margin:0;max-width:340px}
.footer-title{font-size:15px;font-weight:700;color:#F6F4EF;margin-bottom:16px}
.footer-links li,.footer-contact li{margin-bottom:10px;font-size:14px}
.footer-links a{color:rgba(246,244,239,.78);display:inline-block;transition:transform .3s ease,color .3s ease}
.footer-links a:hover{color:var(--c-signal);transform:translateX(-2px);text-decoration:none}
.footer-contact li{display:flex;gap:10px;color:rgba(246,244,239,.72);line-height:1.7}
.footer-contact i{color:var(--c-signal);font-size:13px;margin-top:6px}
.footer-bottom{
  margin-top:44px;
  padding-top:22px;
  border-top:1px solid rgba(255,255,255,.1);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  font-size:13.5px;
  color:rgba(246,244,239,.6);
  flex-wrap:wrap;
}
.footer-bottom a{color:rgba(246,244,239,.72)}
.footer-bottom a:hover{color:var(--c-signal)}

/* ---------- 响应式 ---------- */
@media (max-width:1399px){
  .nav-split{max-width:100%}
}
@media (max-width:1199px){
  .container{padding:0 20px}
  .main-nav a{padding:9px 10px;font-size:14.5px}
  .nav-search{min-width:160px}
  .section{padding:64px 0 8px}
  .section-faq,.section-cta{padding:64px 0 0}
}
@media (max-width:991px){
  .main-nav{display:none}
  .nav-right{display:none}
  .nav-left{flex:1 1 auto;padding:0 20px}
  .nav-toggle{display:flex}
  .page-hero{padding:56px 0 52px;min-height:0}
  .toc-card{position:static;margin-bottom:24px}
  .toc-list{display:grid;grid-template-columns:repeat(2,1fr);gap:2px}
  .visual-band{grid-template-columns:1fr}
  .visual-band img{min-height:220px}
  .metrics-band{grid-template-columns:1fr 1fr}
  .jump-grid{grid-template-columns:1fr}
  .cta-band{flex-direction:column;align-items:flex-start;padding:36px 32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  body{font-size:15.5px}
  .section{padding:48px 0 4px}
  .section-faq,.section-cta{padding:48px 0 0}
  .section-head{margin-bottom:32px}
  .flow-card{padding:24px 22px}
  .flow-card::before{top:30px}
  .flow-card h2{font-size:19.5px}
  .visual-band .band-body{padding:26px 24px}
  .metrics-band{grid-template-columns:1fr;padding:26px 24px;gap:18px}
  .accordion-button{font-size:16px;padding:16px 40px 16px 14px}
  .accordion-body{padding:0 16px 18px 17px;font-size:15px}
  .jump-card{flex-direction:column;align-items:flex-start}
  .jump-card img{width:100%;height:140px}
  .cta-band{padding:30px 24px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .to-top{right:16px;bottom:18px;width:44px;height:44px}
}
@media (max-width:575px){
  .container{padding:0 16px}
  .toc-list{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .page-hero h1{font-size:28px}
  .hero-lead{font-size:15.5px}
}