/* roulang page: index */
:root{
  --primary:#14635A;
  --primary-700:#0E4A43;
  --primary-200:#B9D6CF;
  --primary-50:#E6F1EE;
  --accent:#E08A3C;
  --accent-600:#C9752A;
  --accent-50:#FCF1E4;
  --ink:#161A19;
  --ink-2:#4B5654;
  --ink-3:#7C8685;
  --line:#DDD8CE;
  --bg:#F7F5F0;
  --surface:#FFFFFF;
  --surface-2:#EEF4F1;
  --success:#1E9E6A;
  --warning:#C98A16;
  --error:#B5432F;
  --info:#2F6FB5;
  --radius-card:16px;
  --radius-img:12px;
  --radius-input:10px;
  --radius-btn:10px;
  --shadow-sm:0 1px 2px rgba(22,26,25,.06);
  --shadow-md:0 8px 24px rgba(22,26,25,.08);
  --shadow-lg:0 20px 48px rgba(22,26,25,.12);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-sans:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --font-serif:"Noto Serif SC","Songti SC","PingFang SC",serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.9;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--primary-700);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:2px}
button{font:inherit;color:inherit}
input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700}
p{margin:0 0 18px}
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 32px}
.section{padding:88px 0}
.section--tight{padding:64px 0}
.section--bg{background:var(--surface)}
.section--alt{background:var(--surface-2)}
.section-head{max-width:720px;margin-bottom:40px}
.section-head--split{max-width:none;display:flex;align-items:flex-end;justify-content:space-between;gap:24px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--primary);background:var(--primary-50);border-radius:999px;padding:5px 14px;margin-bottom:16px}
h2.section-title{font-size:28px;line-height:1.4;letter-spacing:.01em}
.section-sub{margin-top:14px;color:var(--ink-2);font-size:16px}
.hairline{height:1px;background:var(--line);border:0;margin:0}

/* header */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.96);backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--line);transition:box-shadow .2s var(--ease)}
.site-header.is-scrolled{box-shadow:var(--shadow-md)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--primary);font-size:19px;font-weight:700;letter-spacing:.01em}
.logo:hover{text-decoration:none;color:var(--primary-700)}
.logo-mark{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:10px;background:var(--primary);color:#fff;font-size:15px}
.logo-text{white-space:nowrap}
.nav-desktop{display:flex;align-items:center;gap:6px}
.nav-link{position:relative;display:inline-flex;align-items:center;gap:6px;font-size:15px;color:var(--ink-2);padding:8px 14px;border-radius:999px;font-weight:500}
.nav-link:hover{color:var(--primary);text-decoration:none}
.nav-link::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform .18s var(--ease)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--primary);background:var(--primary-50)}
.nav-link.is-active::after{display:none}
.nav-item--drop{position:relative}
.nav-drop-btn{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--primary);background:var(--primary-50);border:1px solid var(--primary-200);border-radius:999px;padding:8px 16px;cursor:pointer;transition:background .18s var(--ease)}
.nav-drop-btn i{font-size:11px;transition:transform .18s var(--ease)}
.nav-drop-btn:hover{background:var(--primary-200)}
.nav-item--drop:hover .nav-drop-btn i,.nav-item--drop:focus-within .nav-drop-btn i{transform:rotate(180deg)}
.dropdown{position:absolute;top:calc(100% + 10px);left:0;width:520px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-md);padding:18px;display:grid;grid-template-columns:1fr 200px;gap:18px;opacity:0;visibility:hidden;transform:translateY(-6px);transition:all .18s var(--ease)}
.nav-item--drop:hover .dropdown,.nav-item--drop:focus-within .dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown-links{display:grid;gap:4px}
.dropdown-links a{display:block;padding:9px 12px;border-radius:10px;font-size:14px;color:var(--ink-2);font-weight:500}
.dropdown-links a:hover{background:var(--surface-2);color:var(--primary);text-decoration:none}
.dropdown-cta{background:var(--primary-50);border-radius:12px;padding:16px;display:flex;flex-direction:column;gap:10px;justify-content:center}
.dropdown-cta p{font-size:13px;color:var(--ink-2);margin:0;line-height:1.7}
.header-actions{display:flex;align-items:center;gap:12px}
.burger{display:none;width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:12px;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:4px}
.burger span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.burger.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.burger.is-open span:nth-child(2){opacity:0}
.burger.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;border:1.5px solid transparent;cursor:pointer;transition:all .18s var(--ease);white-space:nowrap}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn:active{transform:translateY(1px)}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-600);color:#fff}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-700);color:#fff}
.btn-outline{background:#fff;border-color:var(--primary);color:var(--primary)}
.btn-outline:hover{background:var(--primary-50);color:var(--primary-700)}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.65);color:#fff}
.btn-outline-light:hover{background:rgba(255,255,255,.12);color:#fff}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:10px}
.btn-block{width:100%}
.btn.pill{border-radius:999px}
.nav-cta{height:44px;border-radius:999px;padding:0 20px;font-size:14.5px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--primary)}
.link-arrow:hover{text-decoration:none;gap:10px}
.link-underline{color:var(--primary);font-weight:600;text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:2px;text-decoration-color:var(--primary-200)}
.link-underline:hover{text-decoration-color:var(--primary);color:var(--primary-700)}

/* hero */
.hero{background:linear-gradient(180deg,#fff 0%,var(--bg) 100%);padding:64px 0 0}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.hero h1{font-family:var(--font-serif);font-size:40px;line-height:1.32;letter-spacing:.01em;font-weight:700}
.hero-sub{margin-top:20px;font-size:17px;color:var(--ink-2);max-width:34em}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.trust-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.badge-pill{display:inline-flex;align-items:center;gap:6px;height:30px;padding:0 14px;border-radius:999px;background:var(--primary-50);color:var(--primary);font-size:13px;font-weight:600;border:1px solid var(--primary-200)}
.hero-media{position:relative;border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-lg);aspect-ratio:4/3;background:var(--primary-50)}
.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-media::after{content:"";position:absolute;inset:0;background:linear-gradient(155deg,rgba(14,74,67,.58),rgba(20,99,90,.34))}
.hero-media-note{position:absolute;left:20px;bottom:20px;z-index:2;color:#fff;font-size:15px;font-weight:600;display:flex;align-items:center;gap:10px;text-shadow:0 1px 8px rgba(14,74,67,.5)}
.hero-media-note i{font-size:14px}
.assure-bar{display:flex;flex-wrap:wrap;align-items:center;gap:8px 22px;min-height:60px;margin-top:56px;padding:14px 0;border-top:1px solid var(--line)}
.assure-bar span{font-size:14px;color:var(--ink-2);display:inline-flex;align-items:center;gap:8px}
.assure-bar span i{color:var(--primary);font-size:13px}
.assure-dot{width:5px;height:5px;border-radius:50%;background:var(--primary-200);display:inline-block;margin:0 4px}

/* pain cards */
.pain-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:20px}
.pain-card{display:flex;align-items:flex-start;gap:16px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:22px 24px;box-shadow:var(--shadow-sm);transition:box-shadow .2s var(--ease),transform .2s var(--ease)}
.pain-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.pain-card--wide{grid-column:1 / -1}
.pain-icon{flex:0 0 auto;width:40px;height:40px;border-radius:50%;border:1.5px solid var(--primary-200);color:var(--primary);display:flex;align-items:center;justify-content:center;background:var(--primary-50)}
.pain-body{flex:1 1 auto}
.pain-body h3{font-size:16px;font-weight:600;line-height:1.7}
.pain-body .link-underline{display:inline-block;margin-top:8px;font-size:14px}

/* solution cards */
.solution-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.solution-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:28px;box-shadow:var(--shadow-sm);transition:all .2s var(--ease);display:flex;flex-direction:column;gap:14px}
.solution-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.solution-card--wide{grid-column:1 / -1;flex-direction:row;align-items:center;gap:32px}
.solution-num{flex:0 0 auto;width:54px;height:54px;border-radius:14px;background:var(--primary-50);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;transition:all .2s var(--ease)}
.solution-card:hover .solution-num{background:var(--primary);color:#fff}
.solution-card h3{font-size:20px;font-weight:600}
.solution-card p{color:var(--ink-2);font-size:15px;margin:0}
.solution-wide-body{flex:1}
.solution-wide-body p{max-width:46em}
.solution-wide-figure{flex:0 0 300px;border-radius:var(--radius-img);overflow:hidden;aspect-ratio:16/10;background:var(--primary-50)}
.solution-wide-figure img{width:100%;height:100%;object-fit:cover}
.solution-foot{margin-top:26px;text-align:left}

/* stats band */
.stats-band{position:relative;background:var(--primary-700);color:#fff;overflow:hidden;padding:64px 0}
.stats-band::before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(135deg,rgba(255,255,255,.06) 0 1px,transparent 1px 16px);pointer-events:none}
.stats-inner{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:32px}
.stat-item{display:flex;flex-direction:column;gap:6px}
.stat-num{font-size:44px;font-weight:700;line-height:1.1;color:var(--accent);letter-spacing:.02em}
.stat-num small{font-size:15px;font-weight:600;margin-left:6px;color:rgba(255,255,255,.85)}
.stat-label{font-size:14px;color:rgba(255,255,255,.82);line-height:1.7}
.stats-foot{position:relative;margin-top:36px;padding-top:26px;border-top:1px solid rgba(255,255,255,.18);display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px}
.stats-foot p{color:rgba(255,255,255,.85);font-size:15px;margin:0;max-width:52em}

/* posts */
.post-layout{display:grid;grid-template-columns:1.25fr 1fr;gap:28px;align-items:start}
.post-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-sm);transition:all .2s var(--ease);display:flex;flex-direction:column}
.post-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.post-card__media{display:block;aspect-ratio:16/10;background:var(--primary-50);overflow:hidden}
.post-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease)}
.post-card:hover .post-card__media img{transform:scale(1.03)}
.post-card__body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:12px;flex:1 1 auto}
.post-card--main .post-card__body{padding:26px 28px 28px}
.post-card h3{font-size:19px;line-height:1.6;font-weight:600}
.post-card--main h3{font-size:22px}
.post-card h3 a{color:var(--ink)}
.post-card h3 a:hover{color:var(--primary);text-decoration:none}
.post-card__excerpt{color:var(--ink-2);font-size:15px;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-meta{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--ink-3);margin-top:auto}
.badge{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;background:var(--primary-50);color:var(--primary);font-size:12.5px;font-weight:600;border:1px solid var(--primary-200)}
.post-side{display:grid;gap:18px}
.post-side .post-card{flex-direction:row;align-items:stretch}
.post-side .post-card__media{flex:0 0 168px;aspect-ratio:auto;border-radius:0}
.post-side .post-card__body{padding:18px 20px}
.post-side h3{font-size:16px}
.empty-state{text-align:center;background:var(--primary-50);border-radius:var(--radius-card);padding:56px 24px;color:var(--ink-2)}
.empty-state i{font-size:30px;color:var(--primary);margin-bottom:14px;display:block}
.empty-state p{font-size:15px;margin-bottom:14px}

/* form */
.form-layout{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.form-intro h2{font-size:28px}
.form-intro p{color:var(--ink-2);margin-top:16px}
.form-figure{margin-top:28px;border-radius:var(--radius-card);overflow:hidden;aspect-ratio:16/9;background:var(--primary-50)}
.form-figure img{width:100%;height:100%;object-fit:cover}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:32px;box-shadow:var(--shadow-md)}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:8px;color:var(--ink)}
.field label .req{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--accent);margin-left:6px;vertical-align:middle}
.field input,.field select,.field textarea{width:100%;height:46px;border:1px solid var(--line);border-radius:var(--radius-input);padding:0 14px;background:#fff;transition:all .18s var(--ease);font-size:15px}
.field textarea{height:96px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 3px rgba(20,99,90,.14)}
.field.has-error input,.field.has-error select{border-color:var(--error)}
.field-error{display:none;color:var(--error);font-size:13px;margin-top:6px}
.field.has-error .field-error{display:block}
.consent{display:flex;align-items:flex-start;gap:10px;font-size:13.5px;color:var(--ink-2);margin:6px 0 18px;line-height:1.7}
.consent input{width:16px;height:16px;margin-top:4px;accent-color:var(--primary)}
.form-success{display:none;align-items:center;gap:8px;margin-top:14px;color:var(--success);font-size:14px;font-weight:600}
.form-success.is-visible{display:flex}

/* privacy strip */
.privacy-strip{background:var(--surface-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:26px 0}
.privacy-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px}
.privacy-inner p{font-size:14px;color:var(--ink-2);margin:0;line-height:1.8;max-width:62em}

/* faq */
.faq-list{display:grid;gap:14px;max-width:860px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;transition:box-shadow .2s var(--ease)}
.faq-item:hover{box-shadow:var(--shadow-sm)}
.faq-item.is-open{box-shadow:var(--shadow-sm)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;background:none;border:0;padding:20px 24px;cursor:pointer;text-align:left;font-size:16px;font-weight:600;color:var(--ink);position:relative}
.faq-q i{color:var(--primary);font-size:14px;transition:transform .2s var(--ease);flex:0 0 auto}
.faq-item.is-open .faq-q i{transform:rotate(180deg)}
.faq-item.is-open .faq-q::before{content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;background:var(--primary);border-radius:0 3px 3px 0}
.faq-panel{display:grid;grid-template-rows:0fr;transition:grid-template-rows .22s var(--ease)}
.faq-item.is-open .faq-panel{grid-template-rows:1fr}
.faq-panel-inner{overflow:hidden}
.faq-panel-inner p{padding:0 24px 22px;font-size:15px;line-height:1.85;color:var(--ink-2);margin:0}

/* cta */
.cta-band{background:var(--primary-50);border-radius:24px;padding:44px 48px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px}
.cta-band h2{font-size:24px}
.cta-band p{color:var(--ink-2);margin-top:10px;font-size:15px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* footer */
.site-footer{background:var(--primary-700);color:rgba(255,255,255,.82);padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.footer-brand .logo{color:#fff;font-size:18px}
.footer-brand .logo-mark{background:rgba(255,255,255,.14)}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.9;color:rgba(255,255,255,.75);max-width:30em}
.footer-col h3{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col ul{display:grid;gap:6px}
.footer-col a{display:inline-block;font-size:14px;line-height:2;color:rgba(255,255,255,.78)}
.footer-col a:hover{color:var(--accent);text-decoration:none}
.footer-bottom{border-top:1px solid rgba(255,255,255,.16);padding:20px 0 28px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:rgba(255,255,255,.68)}
.footer-bottom a{color:rgba(255,255,255,.78);font-size:13px}
.footer-bottom a:hover{color:var(--accent);text-decoration:none}
.footer-links{display:flex;flex-wrap:wrap;gap:18px}

/* drawer */
.drawer{position:fixed;inset:0;z-index:90;background:#fff;transform:translateX(100%);transition:transform .26s var(--ease);display:flex;flex-direction:column}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;height:60px;padding:0 20px;border-bottom:1px solid var(--line)}
.drawer-close{width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:12px;cursor:pointer;display:flex;align-items:center;justify-content:center}
.drawer-nav{padding:20px;display:grid;gap:4px;flex:1 1 auto;overflow-y:auto}
.drawer-nav a{font-size:17px;font-weight:600;padding:16px 12px;border-radius:12px;color:var(--ink-2);border-bottom:1px solid var(--line)}
.drawer-nav a:hover{background:var(--surface-2);color:var(--primary);text-decoration:none}
.drawer-nav a.is-active{color:var(--primary);background:var(--primary-50)}
.drawer-foot{padding:20px;border-top:1px solid var(--line)}

/* modal */
.modal{position:fixed;inset:0;z-index:100;display:none;align-items:center;justify-content:center;padding:24px}
.modal.is-open{display:flex}
.modal-mask{position:absolute;inset:0;background:rgba(22,26,25,.55)}
.modal-panel{position:relative;width:100%;max-width:560px;background:#fff;border-radius:20px;box-shadow:var(--shadow-lg);padding:32px;max-height:90vh;overflow-y:auto}
.modal-close{position:absolute;top:16px;right:16px;width:40px;height:40px;border:1px solid var(--line);background:#fff;border-radius:12px;cursor:pointer;display:flex;align-items:center;justify-content:center}
.modal-panel h3{font-size:20px;padding-right:48px}
.modal-panel .modal-sub{font-size:14px;color:var(--ink-2);margin:10px 0 22px}

@media (max-width:1024px){
  .container{padding:0 24px}
  .section{padding:64px 0}
  .nav-desktop{display:none}
  .burger{display:flex}
  .nav-cta{display:none}
  .header-actions .nav-cta{display:inline-flex}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-media{order:-1}
  .pain-grid{grid-template-columns:1fr}
  .solution-grid{grid-template-columns:1fr}
  .solution-card--wide{flex-direction:column;align-items:flex-start}
  .solution-wide-figure{flex:none;width:100%}
  .stats-inner{grid-template-columns:repeat(2,1fr);gap:28px}
  .post-layout{grid-template-columns:1fr}
  .form-layout{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  body{font-size:15.5px}
  .container{padding:0 20px}
  .section{padding:52px 0}
  .hero{padding:36px 0 0}
  .hero h1{font-size:28px}
  .hero-sub{font-size:16px}
  h2.section-title{font-size:23px}
  .section-head--split{flex-direction:column;align-items:flex-start}
  .stats-inner{grid-template-columns:1fr 1fr}
  .stat-num{font-size:34px}
  .post-side .post-card{flex-direction:column}
  .post-side .post-card__media{flex:none;aspect-ratio:16/10}
  .cta-band{padding:32px 24px;border-radius:18px}
  .form-card{padding:24px}
  .modal{padding:0;align-items:flex-end}
  .modal-panel{max-width:100%;border-radius:20px 20px 0 0;max-height:90vh;padding:26px 20px}
  .privacy-inner{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .hero h1{font-size:26px}
  .hero-actions .btn{width:100%}
  .stats-inner{grid-template-columns:1fr}
  .assure-bar{gap:10px 16px}
  .assure-bar span{font-size:13px}
  .logo{font-size:17px}
  .logo-text{white-space:normal;line-height:1.3}
}

/* roulang page: category1 */
:root{
  --primary:#14635A;
  --primary-700:#0E4A43;
  --primary-200:#B9D6CF;
  --primary-50:#E6F1EE;
  --accent:#E08A3C;
  --accent-600:#C9752A;
  --accent-50:#FCF1E4;
  --ink:#161A19;
  --ink-2:#4B5654;
  --ink-3:#7C8685;
  --line:#DDD8CE;
  --bg:#F7F5F0;
  --surface:#FFFFFF;
  --surface-2:#EEF4F1;
  --success:#1E9E6A;
  --warning:#C98A16;
  --error:#B5432F;
  --info:#2F6FB5;
  --radius-card:16px;
  --radius-img:12px;
  --radius-input:10px;
  --radius-btn:10px;
  --shadow-sm:0 1px 2px rgba(22,26,25,.06);
  --shadow-md:0 8px 24px rgba(22,26,25,.08);
  --shadow-lg:0 20px 48px rgba(22,26,25,.12);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-sans:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-serif:"Noto Serif SC","Songti SC","SimSun",serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.9;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;transition:color .18s var(--ease),opacity .18s var(--ease);}
a:hover{color:var(--primary-700);}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
button{font:inherit;color:inherit;cursor:pointer;}
input,select,textarea{font:inherit;color:inherit;}
strong{font-weight:600;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}

.container{max-width:1200px;margin:0 auto;padding:0 32px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border:1.5px solid transparent;
  border-radius:var(--radius-btn);font-size:15px;font-weight:600;
  letter-spacing:.01em;white-space:nowrap;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn:hover{transform:translateY(-1px);}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--shadow-sm);}
.btn-primary:hover{background:var(--primary-700);color:#fff;box-shadow:var(--shadow-md);}
.btn-accent{background:var(--accent);color:#fff;box-shadow:var(--shadow-sm);}
.btn-accent:hover{background:var(--accent-600);color:#fff;box-shadow:var(--shadow-md);}
.btn-outline{background:var(--surface);border-color:var(--primary);color:var(--primary);}
.btn-outline:hover{background:var(--primary-50);color:var(--primary-700);}
.btn-ghost-light{background:transparent;border-color:rgba(255,255,255,.6);color:#fff;}
.btn-ghost-light:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff;}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}
.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}
.btn.pill{border-radius:999px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--shadow-md);}
.header-inner{display:flex;align-items:center;gap:20px;height:72px;}

.logo{display:inline-flex;align-items:center;gap:10px;color:var(--primary);}
.logo:hover{color:var(--primary-700);}
.logo-mark{
  width:34px;height:34px;border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--primary);color:#fff;font-size:16px;flex:none;
}
.logo-text{font-size:19px;font-weight:700;letter-spacing:.01em;color:inherit;}

.nav-desktop{display:flex;align-items:center;gap:4px;margin-left:12px;flex:1;}
.nav-link,.nav-drop-btn{
  position:relative;display:inline-flex;align-items:center;gap:6px;
  height:40px;padding:0 14px;border:0;background:transparent;
  font-size:15px;font-weight:500;color:var(--ink-2);border-radius:10px;
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.nav-link::after,.nav-drop-btn::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--primary);transform:scaleX(0);transform-origin:left;
  transition:transform .2s var(--ease);border-radius:2px;
}
.nav-link:hover,.nav-drop-btn:hover{color:var(--primary);background:var(--primary-50);}
.nav-link:hover::after,.nav-drop-btn:hover::after{transform:scaleX(1);}
.nav-link.is-active,.nav-drop-btn.is-active{color:var(--primary);background:var(--primary-50);font-weight:600;}
.nav-link.is-active::after,.nav-drop-btn.is-active::after{transform:scaleX(1);}

.nav-item--drop{position:relative;}
.nav-drop-btn i{font-size:11px;transition:transform .2s var(--ease);}
.nav-item--drop:hover .nav-drop-btn i,
.nav-item--drop.is-open .nav-drop-btn i{transform:rotate(180deg);}

.dropdown{
  position:absolute;top:calc(100% + 12px);left:0;width:520px;
  background:var(--surface);border:1px solid var(--line);border-radius:14px;
  box-shadow:var(--shadow-md);padding:18px;
  display:grid;grid-template-columns:1fr 190px;gap:18px;
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
}
.nav-item--drop:hover .dropdown,
.nav-item--drop:focus-within .dropdown,
.nav-item--drop.is-open .dropdown{opacity:1;visibility:visible;transform:translateY(0);}
.dropdown-links{display:flex;flex-direction:column;gap:2px;}
.dropdown-links a{
  display:block;padding:9px 12px;border-radius:10px;font-size:14.5px;color:var(--ink-2);
  transition:background-color .16s var(--ease),color .16s var(--ease);
}
.dropdown-links a:hover{background:var(--primary-50);color:var(--primary-700);}
.dropdown-cta{
  background:var(--primary-50);border-radius:12px;padding:16px;
  display:flex;flex-direction:column;gap:12px;justify-content:center;
}
.dropdown-cta p{font-size:13.5px;color:var(--ink-2);line-height:1.7;}

.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto;}
.nav-cta{border-radius:999px;height:44px;}

.burger{
  display:none;width:44px;height:44px;border:1px solid var(--line);
  border-radius:10px;background:var(--surface);flex-direction:column;
  align-items:center;justify-content:center;gap:4px;
}
.burger span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s var(--ease),opacity .2s var(--ease);}
.burger.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.burger.is-open span:nth-child(2){opacity:0;}
.burger.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

.mobile-drawer{
  position:fixed;left:0;right:0;top:60px;bottom:0;z-index:55;
  background:var(--surface);padding:20px;display:flex;flex-direction:column;
  transform:translateY(-8px);opacity:0;visibility:hidden;overflow:auto;
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
}
.mobile-drawer.is-open{opacity:1;visibility:visible;transform:translateY(0);}
.mobile-nav{display:flex;flex-direction:column;gap:6px;flex:1;}
.mobile-nav a{
  display:block;padding:14px 14px;border-radius:12px;
  font-size:16.5px;font-weight:600;color:var(--ink-2);
}
.mobile-nav a.is-active{background:var(--primary-50);color:var(--primary);}
.mobile-drawer .btn{margin-top:16px;}

/* ---------- 页首窄标题带 ---------- */
.page-hero{
  background:
    linear-gradient(180deg,rgba(230,241,238,.94),rgba(247,245,240,.98)),
    url("/assets/images/backpic/back-1.webp") center/cover no-repeat;
  border-bottom:1px solid var(--line);
  padding:56px 0 48px;
}
.breadcrumb{font-size:13.5px;color:var(--ink-3);margin-bottom:18px;display:flex;flex-wrap:wrap;gap:8px;align-items:center;}
.breadcrumb a{color:var(--ink-2);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb span.sep{color:var(--primary-200);}
.breadcrumb .current{color:var(--ink-3);}
.page-hero-inner{display:flex;gap:40px;align-items:flex-end;justify-content:space-between;}
.page-hero-copy{max-width:720px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:600;color:var(--primary);
  background:var(--surface);border:1px solid var(--primary-200);
  padding:5px 14px;border-radius:999px;margin-bottom:16px;
}
.page-hero h1{
  font-family:var(--font-serif);
  font-size:36px;line-height:1.35;font-weight:700;letter-spacing:.01em;
  color:var(--ink);margin-bottom:14px;
}
.page-hero-sub{font-size:16px;color:var(--ink-2);max-width:620px;}
.anchor-pills{display:flex;flex-wrap:wrap;gap:10px;padding-bottom:6px;}
.pill-link{
  display:inline-flex;align-items:center;gap:6px;
  height:36px;padding:0 16px;border-radius:999px;
  background:var(--surface);border:1px solid var(--line);
  font-size:14px;font-weight:600;color:var(--primary);
  box-shadow:var(--shadow-sm);
  transition:background-color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.pill-link:hover{background:var(--primary-50);border-color:var(--primary-200);color:var(--primary-700);transform:translateY(-2px);}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0;}
.section--tight{padding:64px 0;}
.section--alt{background:var(--surface);}
.section--tint{background:var(--surface-2);}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head h2{font-size:28px;line-height:1.45;font-weight:700;letter-spacing:.01em;margin-bottom:12px;}
.section-head p{font-size:16px;color:var(--ink-2);}

/* ---------- 图文交错块 ---------- */
.split-list{display:flex;flex-direction:column;}
.split-block{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);
  gap:48px;align-items:center;padding:56px 0;
}
.split-block.reverse{grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);}
.split-block.reverse .split-media{order:2;}
.split-media{
  position:relative;border-radius:var(--radius-card);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
  aspect-ratio:16/11;background:var(--primary-50);
}
.split-media img{width:100%;height:100%;object-fit:cover;}
.split-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(20,99,90,.10),rgba(20,99,90,.34));
}
.split-media .media-tag{
  position:absolute;left:16px;bottom:16px;z-index:2;
  background:rgba(255,255,255,.94);color:var(--primary-700);
  font-size:12.5px;font-weight:600;padding:5px 14px;border-radius:999px;
}
.split-copy h3{font-size:22px;font-weight:700;line-height:1.5;margin-bottom:12px;}
.split-copy .lead{font-size:16px;color:var(--ink-2);margin-bottom:20px;}
.split-divider{height:1px;background:var(--line);border:0;margin:0;}

.step-list{counter-reset:step;display:flex;flex-direction:column;gap:12px;}
.step-list li{
  position:relative;padding:12px 16px 12px 50px;
  background:var(--surface);border:1px solid var(--line);border-radius:12px;
  font-size:15px;color:var(--ink-2);box-shadow:var(--shadow-sm);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.step-list li::before{
  counter-increment:step;content:counter(step,decimal-leading-zero);
  position:absolute;left:14px;top:12px;
  width:26px;height:26px;border-radius:8px;
  background:var(--primary-50);color:var(--primary);
  font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;
  font-variant-numeric:tabular-nums;
}
.step-list li:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--primary-200);}
.step-list li strong{display:block;color:var(--ink);font-size:15.5px;margin-bottom:2px;}

/* ---------- 步骤轴 ---------- */
.timeline-wrap{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:56px;align-items:start;}
.timeline-aside{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:28px;box-shadow:var(--shadow-sm);position:sticky;top:96px;
}
.timeline-aside h3{font-size:19px;font-weight:700;margin-bottom:10px;}
.timeline-aside p{font-size:14.5px;color:var(--ink-2);margin-bottom:18px;}
.timeline{margin:0;display:flex;flex-direction:column;}
.timeline li{
  position:relative;padding:0 0 32px 44px;
}
.timeline li:last-child{padding-bottom:0;}
.timeline li::before{
  content:"";position:absolute;left:11px;top:26px;bottom:0;width:2px;
  background:linear-gradient(180deg,var(--primary-200),var(--primary-50));
}
.timeline li:last-child::before{display:none;}
.timeline .dot{
  position:absolute;left:0;top:2px;width:24px;height:24px;border-radius:50%;
  background:var(--surface);border:2px solid var(--primary);color:var(--primary);
  font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;
  font-variant-numeric:tabular-nums;
}
.timeline li:first-child .dot{background:var(--primary);color:#fff;}
.timeline h4{font-size:16.5px;font-weight:600;margin-bottom:6px;}
.timeline p{font-size:15px;color:var(--ink-2);}

/* ---------- FAQ ---------- */
.faq-list{max-width:840px;margin:0 auto;display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:14px;
  overflow:hidden;transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.faq-item:hover{border-color:var(--primary-200);}
.faq-item.is-open{border-color:var(--primary-200);box-shadow:var(--shadow-sm);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px 18px 26px;background:transparent;border:0;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink);position:relative;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;
  background:var(--primary);border-radius:0 3px 3px 0;
  transform:scaleY(0);transform-origin:top;transition:transform .22s var(--ease);
}
.faq-item.is-open .faq-q::before{transform:scaleY(1);}
.faq-q i{font-size:13px;color:var(--primary);transition:transform .22s var(--ease);flex:none;}
.faq-item.is-open .faq-q i{transform:rotate(180deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s var(--ease);}
.faq-a p{padding:0 26px 20px;font-size:15px;line-height:1.85;color:var(--ink-2);}

/* ---------- 相关分类互链 ---------- */
.cross-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.cross-card{
  display:flex;flex-direction:column;gap:10px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--shadow-sm);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.cross-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--primary-200);}
.cross-card .badge{
  align-self:flex-start;display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 12px;border-radius:999px;
  background:var(--primary-50);color:var(--primary);
  font-size:12.5px;font-weight:600;
}
.cross-card h3{font-size:18px;font-weight:700;color:var(--ink);}
.cross-card p{font-size:14.5px;color:var(--ink-2);}
.cross-card .more{font-size:14px;font-weight:600;color:var(--primary);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:2px;}

/* ---------- CTA 横带 ---------- */
.cta-band{background:var(--primary-700);color:#fff;padding:64px 0;}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;}
.cta-inner h2{font-size:26px;font-weight:700;line-height:1.5;margin-bottom:8px;}
.cta-inner p{font-size:15px;color:rgba(255,255,255,.78);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--primary-700);color:#F2F1EC;padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding-bottom:44px;}
.footer-brand .logo{color:#fff;margin-bottom:16px;}
.footer-brand .logo:hover{color:#fff;}
.footer-brand .logo-mark{background:var(--accent);}
.footer-brand p{font-size:14px;line-height:1.95;color:rgba(255,255,255,.72);max-width:340px;}
.footer-col h3{font-size:15px;font-weight:600;color:#fff;margin-bottom:14px;}
.footer-col ul{display:flex;flex-direction:column;gap:2px;}
.footer-col a{font-size:14px;line-height:2;color:rgba(255,255,255,.74);}
.footer-col a:hover{color:var(--accent);}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.16);padding:20px 0 28px;
  font-size:13px;color:rgba(255,255,255,.62);
}
.footer-links{display:flex;gap:18px;}
.footer-links a{font-size:13px;color:rgba(255,255,255,.62);}
.footer-links a:hover{color:var(--accent);}

/* ---------- 弹层 ---------- */
.modal{
  position:fixed;inset:0;z-index:90;display:none;
  align-items:center;justify-content:center;padding:20px;
}
.modal.is-open{display:flex;}
.modal-mask{position:absolute;inset:0;background:rgba(22,26,25,.55);}
.modal-panel{
  position:relative;width:100%;max-width:560px;background:var(--surface);
  border-radius:20px;box-shadow:var(--shadow-lg);padding:32px;
  max-height:90vh;overflow:auto;animation:pop .22s var(--ease);
}
@keyframes pop{from{opacity:0;transform:translateY(12px);}to{opacity:1;transform:none;}}
.modal-close{
  position:absolute;right:16px;top:16px;width:36px;height:36px;
  border:1px solid var(--line);border-radius:10px;background:var(--surface);
  font-size:16px;color:var(--ink-2);display:flex;align-items:center;justify-content:center;
}
.modal-close:hover{background:var(--surface-2);color:var(--ink);}
.modal-panel h3{font-size:20px;font-weight:700;margin-bottom:8px;}
.modal-desc{font-size:14px;color:var(--ink-2);margin-bottom:22px;}

/* ---------- 表单 ---------- */
.form{display:flex;flex-direction:column;gap:16px;}
.field{display:flex;flex-direction:column;gap:7px;}
.field label{font-size:14px;font-weight:600;color:var(--ink-2);display:flex;align-items:center;gap:6px;}
.field label .req{width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block;}
.field input,.field select,.field textarea{
  height:46px;padding:0 14px;border:1px solid var(--line);
  border-radius:var(--radius-input);background:var(--surface);
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.field textarea{height:96px;padding:12px 14px;resize:vertical;line-height:1.7;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-50);
}
.field.has-error input,.field.has-error select{border-color:var(--error);}
.field .err{font-size:13px;color:var(--error);display:none;}
.field.has-error .err{display:block;}
.agree{display:flex;align-items:flex-start;gap:10px;font-size:13.5px;color:var(--ink-2);line-height:1.7;}
.agree input{width:16px;height:16px;margin-top:4px;accent-color:var(--primary);}
.form-success{
  display:none;align-items:center;gap:8px;font-size:14px;color:var(--success);
  background:rgba(30,158,106,.08);border-radius:10px;padding:10px 14px;
}
.form-success.is-shown{display:flex;}

@media (max-width:1023px){
  .nav-desktop{display:none;}
  .burger{display:flex;}
  .header-inner{height:60px;}
  .site-header .nav-cta{height:40px;padding:0 16px;font-size:14px;}
  .mobile-drawer{top:60px;}
  .page-hero{padding:40px 0 36px;}
  .page-hero h1{font-size:27px;line-height:1.4;}
  .page-hero-inner{flex-direction:column;align-items:flex-start;gap:24px;}
  .section{padding:64px 0;}
  .split-block,.split-block.reverse{grid-template-columns:1fr;gap:24px;padding:40px 0;}
  .split-block.reverse .split-media{order:0;}
  .timeline-wrap{grid-template-columns:1fr;gap:32px;}
  .timeline-aside{position:static;}
  .cross-links{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}

@media (max-width:640px){
  body{font-size:15.5px;}
  .container{padding:0 20px;}
  .logo-text{font-size:17px;}
  .page-hero h1{font-size:24px;}
  .section{padding:48px 0;}
  .section-head h2{font-size:22px;}
  .split-copy h3{font-size:19px;}
  .cta-inner h2{font-size:21px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .modal-panel{padding:24px 20px;border-radius:16px;}
  .faq-q{padding:16px 18px 16px 22px;font-size:15.5px;}
  .faq-a p{padding:0 22px 18px;}
}

/* roulang page: article */
:root{
  --primary:#14635A;
  --primary-700:#0E4A43;
  --primary-200:#B9D6CF;
  --primary-50:#E6F1EE;
  --accent:#E08A3C;
  --accent-600:#C9752A;
  --accent-50:#FCF1E4;
  --ink:#161A19;
  --ink-2:#4B5654;
  --ink-3:#7C8685;
  --line:#DDD8CE;
  --bg:#F7F5F0;
  --surface:#FFFFFF;
  --surface-2:#EEF4F1;
  --success:#1E9E6A;
  --warning:#C98A16;
  --error:#B5432F;
  --info:#2F6FB5;
  --r-lg:20px;
  --r-md:16px;
  --r-sm:10px;
  --sh-sm:0 1px 2px rgba(22,26,25,.06);
  --sh-md:0 8px 24px rgba(22,26,25,.08);
  --sh-lg:0 20px 48px rgba(22,26,25,.12);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-sans:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-serif:"Noto Serif SC","Songti SC","Source Han Serif SC",serif;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;}
a:hover{color:var(--primary-700);}
button,input,select,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px;}

/* ============ 按钮 / 徽章 / 通用组件 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-sm);border:1.5px solid transparent;
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  transition:transform .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
  white-space:nowrap;
}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--sh-sm);}
.btn-primary:hover{background:var(--primary-700);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-md);}
.btn-accent{background:var(--accent);color:#fff;box-shadow:var(--sh-sm);}
.btn-accent:hover{background:var(--accent-600);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-md);}
.btn-outline{background:var(--surface);color:var(--primary);border-color:var(--primary);}
.btn-outline:hover{background:var(--primary-50);color:var(--primary-700);transform:translateY(-1px);}
.btn-ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.6);}
.btn-ghost-light:hover{background:rgba(255,255,255,.12);color:#fff;}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:999px;}
.btn-block{width:100%;}
.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none;}
.link-underline{
  color:var(--primary);font-weight:600;font-size:15px;
  text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px;
  transition:color .18s var(--ease);
}
.link-underline:hover{color:var(--accent-600);}
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  background:var(--primary-50);color:var(--primary);font-size:12.5px;font-weight:600;letter-spacing:.02em;
}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  margin-bottom:32px;flex-wrap:wrap;
}
.section-head h2{font-size:28px;line-height:1.4;font-weight:700;letter-spacing:.01em;}
.section-head p{color:var(--ink-2);font-size:15px;margin-top:8px;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--sh-md);}
.header-inner{
  display:flex;align-items:center;gap:28px;height:72px;
}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--primary);flex:0 0 auto;}
.logo-mark{
  width:36px;height:36px;border-radius:11px;background:var(--primary);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;font-size:16px;
  box-shadow:0 6px 14px rgba(20,99,90,.28);
}
.logo-text{font-size:19px;font-weight:700;letter-spacing:.01em;color:var(--primary);}
.nav-desktop{display:flex;align-items:center;gap:6px;flex:1 1 auto;}
.nav-link{
  display:inline-flex;align-items:center;height:40px;padding:0 14px;border-radius:999px;
  font-size:15px;font-weight:500;color:var(--ink-2);position:relative;
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.nav-link:hover{color:var(--primary);background:var(--primary-50);}
.nav-link.is-active{color:var(--primary);font-weight:600;background:var(--primary-50);}
.nav-item--drop{position:relative;}
.nav-drop-btn{
  display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 16px;border:0;cursor:pointer;
  border-radius:999px;background:var(--primary-50);color:var(--primary);
  font-size:15px;font-weight:600;transition:background-color .18s var(--ease);
}
.nav-drop-btn:hover{background:var(--primary-200);}
.nav-drop-btn i{font-size:11px;transition:transform .2s var(--ease);}
.nav-item--drop.is-open .nav-drop-btn i{transform:rotate(180deg);}
.dropdown{
  position:absolute;top:calc(100% + 12px);left:0;width:520px;
  background:var(--surface);border:1px solid var(--line);border-radius:14px;
  box-shadow:var(--sh-md);padding:20px;display:none;gap:20px;
}
.nav-item--drop:hover .dropdown,
.nav-item--drop:focus-within .dropdown,
.nav-item--drop.is-open .dropdown{display:flex;}
.dropdown-links{flex:1 1 auto;display:flex;flex-direction:column;gap:2px;}
.dropdown-links a{
  display:block;padding:9px 12px;border-radius:10px;font-size:14.5px;color:var(--ink-2);
  transition:background-color .16s var(--ease),color .16s var(--ease);
}
.dropdown-links a:hover{background:var(--surface-2);color:var(--primary);}
.dropdown-cta{
  flex:0 0 168px;background:var(--surface-2);border-radius:12px;padding:16px;
  display:flex;flex-direction:column;justify-content:space-between;gap:14px;
}
.dropdown-cta p{font-size:13px;line-height:1.7;color:var(--ink-2);}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto;}
.nav-cta{height:44px;border-radius:999px;padding:0 20px;font-size:15px;}
.burger{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;
  background:var(--surface);cursor:pointer;padding:0;align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.burger span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s var(--ease),opacity .2s var(--ease);}
.burger.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.burger.is-open span:nth-child(2){opacity:0;}
.burger.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.nav-mobile-cta{display:none;}

/* ============ 文章头部 ============ */
.article-hero{
  background:linear-gradient(180deg,var(--primary-50) 0%,var(--bg) 100%);
  border-bottom:1px solid var(--line);
  padding:40px 0 44px;
}
.breadcrumb{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  font-size:14px;color:var(--ink-3);margin-bottom:20px;
}
.breadcrumb a{color:var(--ink-2);}
.breadcrumb a:hover{color:var(--primary);}
.crumb-sep{color:var(--line);}
.crumb-mid{color:var(--ink-2);}
.crumb-now{
  color:var(--ink-3);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.article-hero h1{
  font-size:34px;line-height:1.45;font-weight:700;letter-spacing:.01em;
  max-width:880px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.article-meta{
  display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  margin-top:20px;font-size:14px;color:var(--ink-3);
}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:7px;}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--line);}
.article-hero .badge{margin-right:2px;}

/* ============ 正文布局 ============ */
.article-section{padding:56px 0 72px;}
.article-layout{display:grid;grid-template-columns:minmax(0,720px) 280px;gap:56px;justify-content:center;}
.article-main{min-width:0;}
.article-body{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:40px 40px 44px;box-shadow:var(--sh-sm);
  font-size:17px;line-height:1.95;color:var(--ink-2);
}
.article-body > * + *{margin-top:18px;}
.article-body p{margin:0;font-size:17px;line-height:1.95;color:var(--ink-2);}
.article-body > p:first-of-type{
  font-size:16.5px;font-weight:500;color:var(--ink);
  background:var(--surface-2);border-left:3px solid var(--primary);
  padding:16px 18px;border-radius:0 10px 10px 0;
}
.article-body h2{
  font-size:24px;line-height:1.5;font-weight:700;color:var(--ink);
  margin:40px 0 16px;padding-left:14px;border-left:4px solid var(--primary);
  scroll-margin-top:96px;
}
.article-body h3{
  font-size:19px;line-height:1.6;font-weight:600;color:var(--ink);
  margin:28px 0 12px;scroll-margin-top:96px;
}
.article-body ul,.article-body ol{margin:16px 0;padding-left:0;}
.article-body ul li,.article-body ol li{
  position:relative;padding-left:22px;margin-bottom:10px;font-size:16.5px;line-height:1.9;color:var(--ink-2);
}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.86em;width:7px;height:7px;border-radius:2px;background:var(--primary);
}
.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:.18em;width:18px;height:18px;
  display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;
  color:var(--primary);background:var(--primary-50);border-radius:5px;
}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;background:var(--primary-50);
  border-left:3px solid var(--primary);border-radius:0 12px 12px 0;
  font-size:16.5px;color:var(--ink-2);
}
.article-body img{
  border-radius:12px;margin:24px auto;box-shadow:var(--sh-sm);
  background:var(--primary-50);
}
.article-body figure{margin:24px 0;}
.article-body figcaption{font-size:13px;color:var(--ink-3);text-align:center;margin-top:10px;}
.article-body a{color:var(--primary);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:3px;}
.article-body a:hover{color:var(--accent-600);}
.article-body strong{color:var(--ink);font-weight:600;}
.article-body table{
  width:100%;border-collapse:collapse;font-size:15.5px;margin:24px 0;
  border:1px solid var(--line);border-radius:10px;overflow:hidden;
}
.article-body th{background:var(--primary-50);color:var(--primary-700);font-weight:600;text-align:left;}
.article-body th,.article-body td{padding:12px 14px;border-bottom:1px solid var(--line);line-height:1.7;}
.article-body tr:last-child td{border-bottom:0;}
.article-body .table-wrap{overflow-x:auto;}

.article-foot{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  margin-top:28px;padding-top:24px;border-top:1px solid var(--line);
}

/* 空态 */
.empty-state{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:64px 32px;text-align:center;box-shadow:var(--sh-sm);
}
.empty-state .empty-icon{
  width:64px;height:64px;border-radius:18px;background:var(--primary-50);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:26px;margin:0 auto 20px;
}
.empty-state h2{font-size:20px;font-weight:700;color:var(--ink);}
.empty-state p{margin-top:10px;color:var(--ink-3);font-size:15px;}
.empty-state .btn{margin-top:22px;}

/* 侧栏 */
.article-side{display:flex;flex-direction:column;gap:20px;position:sticky;top:96px;align-self:start;}
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px 22px 24px;box-shadow:var(--sh-sm);
}
.side-title{
  font-size:15px;font-weight:700;color:var(--ink);margin-bottom:14px;
  display:flex;align-items:center;gap:8px;
}
.side-title::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--primary);}
.toc-list{display:flex;flex-direction:column;gap:2px;}
.toc-list a{
  display:block;padding:7px 10px;border-radius:8px;font-size:14px;color:var(--ink-2);
  transition:background-color .16s var(--ease),color .16s var(--ease);
}
.toc-list a:hover{background:var(--surface-2);color:var(--primary);}
.toc-list a.toc-h3{padding-left:22px;font-size:13.5px;color:var(--ink-3);}
.side-links{display:flex;flex-direction:column;gap:2px;}
.side-links a{
  display:flex;align-items:center;gap:8px;padding:9px 10px;border-radius:8px;
  font-size:14.5px;color:var(--ink-2);transition:background-color .16s var(--ease),color .16s var(--ease);
}
.side-links a:hover{background:var(--surface-2);color:var(--primary);}
.side-links a i{color:var(--primary-200);font-size:12px;}
.side-cta{
  background:var(--primary-50);border:1px solid var(--primary-200);border-radius:var(--r-md);
  padding:22px;box-shadow:var(--sh-sm);
}
.side-cta h2{font-size:16px;font-weight:700;color:var(--primary-700);}
.side-cta p{font-size:13.5px;line-height:1.8;color:var(--ink-2);margin:8px 0 16px;}

/* ============ 相关推荐 ============ */
.related{background:var(--surface);border-top:1px solid var(--line);padding:64px 0;}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.rel-card{
  display:flex;gap:16px;align-items:flex-start;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-md);padding:16px;
  box-shadow:var(--sh-sm);transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--sh-md);border-color:var(--primary-200);}
.rel-thumb{
  flex:0 0 96px;width:96px;aspect-ratio:4/3;border-radius:12px;overflow:hidden;
  background:var(--primary-50);display:flex;align-items:center;justify-content:center;
}
.rel-thumb img{width:100%;height:100%;object-fit:cover;}
.rel-body h3{
  font-size:15.5px;font-weight:600;line-height:1.55;color:var(--ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .2s var(--ease);
}
.rel-card:hover .rel-body h3{color:var(--primary);}
.rel-body span{display:block;margin-top:8px;font-size:13px;color:var(--ink-3);}

/* ============ 深色 CTA 横带 ============ */
.cta-band{
  background:var(--primary-700);color:#fff;padding:56px 0;position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(115deg,rgba(255,255,255,.05) 0 2px,transparent 2px 22px);
  pointer-events:none;
}
.cta-inner{
  position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-inner h2{font-size:26px;line-height:1.45;font-weight:700;color:#fff;}
.cta-inner p{color:rgba(255,255,255,.78);font-size:15px;margin-top:10px;}

/* ============ 页脚 ============ */
.site-footer{background:var(--primary-700);color:rgba(255,255,255,.82);padding:64px 0 26px;}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;
  padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.14);
}
.site-footer .logo-text{color:#fff;}
.site-footer .logo-mark{background:rgba(255,255,255,.14);box-shadow:none;}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.9;color:rgba(255,255,255,.72);max-width:360px;}
.footer-col h3{font-size:15px;font-weight:600;color:#fff;margin-bottom:14px;}
.footer-col ul{display:flex;flex-direction:column;gap:6px;}
.footer-col a{font-size:14px;line-height:2;color:rgba(255,255,255,.78);transition:color .18s var(--ease);}
.footer-col a:hover{color:var(--accent);}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding-top:22px;font-size:13px;color:rgba(255,255,255,.6);
}
.footer-links{display:flex;gap:20px;}
.footer-links a{color:rgba(255,255,255,.7);font-size:13px;}
.footer-links a:hover{color:var(--accent);}

/* ============ 弹层与表单 ============ */
.modal{position:fixed;inset:0;z-index:120;display:none;}
.modal.is-open{display:block;}
.modal-mask{position:absolute;inset:0;background:rgba(22,26,25,.55);}
.modal-panel{
  position:relative;z-index:1;width:min(560px,calc(100% - 40px));margin:8vh auto 0;
  background:var(--surface);border-radius:var(--r-lg);box-shadow:var(--sh-lg);
  padding:30px 30px 32px;max-height:86vh;overflow:auto;
  animation:modalIn .22s var(--ease);
}
@keyframes modalIn{from{opacity:0;transform:translateY(14px);}to{opacity:1;transform:none;}}
.modal-close{
  position:absolute;top:14px;right:14px;width:36px;height:36px;border-radius:10px;
  border:1px solid var(--line);background:var(--surface);cursor:pointer;color:var(--ink-2);
  font-size:18px;line-height:1;display:flex;align-items:center;justify-content:center;
  transition:background-color .18s var(--ease),color .18s var(--ease);
}
.modal-close:hover{background:var(--surface-2);color:var(--primary);}
.modal-panel h2{font-size:20px;font-weight:700;}
.modal-desc{font-size:14px;line-height:1.8;color:var(--ink-3);margin-top:8px;}
.form{margin-top:22px;display:flex;flex-direction:column;gap:16px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field label{font-size:14px;font-weight:500;color:var(--ink-2);display:flex;align-items:center;gap:6px;}
.field .req-dot{width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block;}
.field input,.field select,.field textarea{
  width:100%;height:46px;padding:0 14px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:var(--surface);font-size:15px;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.field textarea{height:auto;min-height:92px;padding:12px 14px;line-height:1.8;resize:vertical;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-50);
}
.field.has-error input,.field.has-error select{border-color:var(--error);}
.field .err-msg{font-size:13px;color:var(--error);}
.agree{display:flex;align-items:flex-start;gap:10px;font-size:13.5px;color:var(--ink-3);line-height:1.7;}
.agree input{margin-top:4px;width:16px;height:16px;accent-color:var(--primary);}
.form-success{
  display:flex;align-items:center;gap:10px;font-size:14px;color:var(--success);
  background:#ECF8F2;border-radius:var(--r-sm);padding:12px 14px;
}

/* ============ 平板 ============ */
@media (max-width:1100px){
  .article-layout{grid-template-columns:minmax(0,1fr) 260px;gap:32px;}
}
@media (max-width:1023px){
  .container{padding:0 24px;}
  .burger{display:flex;}
  .nav-desktop{
    position:fixed;left:0;right:0;top:62px;display:none;flex-direction:column;align-items:stretch;
    gap:4px;background:var(--surface);border-bottom:1px solid var(--line);
    padding:16px 20px 24px;box-shadow:var(--sh-md);max-height:calc(100vh - 62px);overflow:auto;
  }
  .nav-desktop.is-open{display:flex;}
  .nav-link{height:48px;font-size:16px;border-radius:12px;}
  .nav-item--drop{width:100%;}
  .nav-drop-btn{width:100%;justify-content:space-between;height:48px;font-size:16px;border-radius:12px;}
  .dropdown{
    position:static;width:100%;display:none;flex-direction:column;box-shadow:none;
    border-radius:12px;margin-top:8px;padding:14px;gap:12px;
  }
  .nav-item--drop:hover .dropdown{display:none;}
  .nav-item--drop.is-open .dropdown{display:flex;}
  .dropdown-cta{flex:1 1 auto;}
  .nav-mobile-cta{display:inline-flex;margin-top:14px;}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:28px;}
  .article-side{position:static;order:2;}
  .article-body{padding:30px 28px 34px;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
/* ============ 移动端 ============ */
@media (max-width:767px){
  .container{padding:0 20px;}
  .header-inner{height:62px;gap:12px;}
  .logo-text{font-size:17px;}
  .nav-cta{height:44px;padding:0 14px;font-size:14px;}
  .nav-cta span{display:none;}
  .article-hero{padding:28px 0 32px;}
  .article-hero h1{font-size:26px;line-height:1.5;}
  .article-section{padding:36px 0 52px;}
  .article-body{padding:24px 20px 28px;font-size:16.5px;}
  .article-body p{font-size:16.5px;}
  .article-body h2{font-size:21px;margin:32px 0 14px;}
  .article-body h3{font-size:17.5px;}
  .article-body > p:first-of-type{font-size:16px;}
  .related{padding:48px 0;}
  .related-grid{grid-template-columns:minmax(0,1fr);gap:16px;}
  .cta-band{padding:44px 0;}
  .cta-inner h2{font-size:21px;}
  .cta-inner .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:28px;}
  .site-footer{padding:48px 0 22px;}
  .modal-panel{width:100%;margin:0;border-radius:20px 20px 0 0;max-height:90vh;position:fixed;bottom:0;left:0;padding:26px 20px 30px;}
  .section-head h2{font-size:22px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .article-meta{gap:10px;font-size:13px;}
  .crumb-now{max-width:180px;}
  .rel-thumb{flex:0 0 80px;width:80px;}
}

/* roulang page: category2 */
:root{
  --primary:#14635A;
  --primary-700:#0E4A43;
  --primary-200:#B9D6CF;
  --primary-50:#E6F1EE;
  --accent:#E08A3C;
  --accent-600:#C9752A;
  --accent-50:#FCF1E4;
  --ink:#161A19;
  --ink-2:#4B5654;
  --ink-3:#7C8685;
  --line:#DDD8CE;
  --bg:#F7F5F0;
  --surface:#FFFFFF;
  --surface-2:#EEF4F1;
  --success:#1E9E6A;
  --warning:#C98A16;
  --error:#B5432F;
  --info:#2F6FB5;
  --r-card:16px;
  --r-img:12px;
  --r-btn:10px;
  --r-input:10px;
  --sh-sm:0 1px 2px rgba(22,26,25,.06);
  --sh-md:0 8px 24px rgba(22,26,25,.08);
  --sh-lg:0 20px 48px rgba(22,26,25,.12);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-sans:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.9;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:var(--primary);text-decoration:none}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;
}
button{font-family:inherit;cursor:pointer}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700;color:var(--ink)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1.5px solid transparent;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
  white-space:nowrap;
}
.btn i{font-size:13px}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-700);transform:translateY(-1px);box-shadow:var(--sh-md)}
.btn-primary:active{transform:translateY(1px)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-600);transform:translateY(-1px);box-shadow:var(--sh-md)}
.btn-accent:active{transform:translateY(1px)}
.btn-outline{background:#fff;color:var(--primary);border-color:var(--primary)}
.btn-outline:hover{background:var(--primary-50);transform:translateY(-1px)}
.btn-ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
.btn-ghost-light:hover{background:rgba(255,255,255,.12)}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px;border-radius:999px}
.btn-block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}
.link-underline{
  color:var(--primary);font-weight:600;text-decoration:underline;
  text-decoration-thickness:2px;text-underline-offset:4px;
}
.link-underline:hover{color:var(--primary-700)}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--sh-md)}
.header-inner{display:flex;align-items:center;gap:20px;height:72px}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:34px;height:34px;border-radius:10px;background:var(--primary);color:#fff;
  display:grid;place-items:center;font-size:15px;flex:0 0 auto;
}
.logo-text{font-size:19px;font-weight:700;color:var(--primary);letter-spacing:.01em}
.nav-desktop{display:flex;align-items:center;gap:6px;margin-left:16px}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:40px;padding:0 14px;
  border-radius:999px;font-size:15px;color:var(--ink-2);font-weight:500;
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.nav-link:hover{color:var(--primary);background:var(--primary-50)}
.nav-link.is-active{color:var(--primary);background:var(--primary-50);font-weight:600}
.nav-item--drop{position:relative}
.nav-drop-btn{
  display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 16px;
  border:0;border-radius:999px;background:var(--primary-50);color:var(--primary);
  font-size:15px;font-weight:600;transition:background-color .18s var(--ease);
}
.nav-drop-btn:hover{background:var(--primary-200)}
.nav-drop-btn i{font-size:11px;transition:transform .2s var(--ease)}
.nav-item--drop.is-open .nav-drop-btn i{transform:rotate(180deg)}
.dropdown{
  position:absolute;top:calc(100% + 12px);left:0;width:620px;
  background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--sh-md);
  padding:18px;display:grid;grid-template-columns:1fr 200px;gap:16px;
  opacity:0;visibility:hidden;transform:translateY(6px);
  transition:opacity .18s var(--ease),transform .18s var(--ease),visibility .18s var(--ease);
}
.nav-item--drop:hover .dropdown,.nav-item--drop.is-open .dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown-links{display:grid;gap:2px}
.dropdown-links a{
  display:block;padding:9px 12px;border-radius:10px;font-size:14px;color:var(--ink-2);
  transition:background-color .16s var(--ease),color .16s var(--ease);
}
.dropdown-links a:hover{background:var(--surface-2);color:var(--primary)}
.dropdown-cta{
  background:var(--primary-50);border-radius:12px;padding:16px;
  display:flex;flex-direction:column;justify-content:space-between;gap:12px;
}
.dropdown-cta p{font-size:13px;line-height:1.7;color:var(--ink-2)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-cta{min-height:44px;border-radius:999px;padding:0 20px}
.burger{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;
  background:#fff;flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.burger span{display:block;width:18px;height:2px;background:var(--ink-2);border-radius:2px;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.burger.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.burger.is-open span:nth-child(2){opacity:0}
.burger.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- 移动端抽屉 ---------- */
.drawer{
  position:fixed;inset:60px 0 0 0;background:#fff;z-index:70;
  padding:24px 20px 28px;display:none;flex-direction:column;gap:8px;overflow-y:auto;
}
.drawer.is-open{display:flex}
.drawer-nav{display:flex;flex-direction:column;gap:4px}
.drawer-nav a{
  padding:14px 12px;border-radius:12px;font-size:16px;font-weight:600;color:var(--ink-2);
  border-bottom:1px solid var(--line);
}
.drawer-nav a.is-active{color:var(--primary);background:var(--primary-50)}
.drawer-cta{margin-top:auto;width:100%}

/* ---------- 页首标题带 ---------- */
.page-hero{
  background:linear-gradient(180deg,var(--primary-50) 0%,var(--bg) 100%);
  border-bottom:1px solid var(--line);
  padding:56px 0 44px;
}
.page-hero-inner{display:flex;align-items:flex-end;justify-content:space-between;gap:40px;flex-wrap:wrap}
.page-hero-text{max-width:640px}
.eyebrow{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;
  border-radius:999px;background:var(--primary-200);color:var(--primary-700);
  font-size:12px;font-weight:600;letter-spacing:.04em;margin-bottom:16px;
}
.page-hero h1{
  font-family:var(--font-serif);
  font-size:clamp(27px,3.2vw,36px);line-height:1.3;letter-spacing:.01em;
  color:var(--ink);margin-bottom:12px;
}
.page-hero-sub{font-size:15px;line-height:1.85;color:var(--ink-2);max-width:560px}
.anchor-pills{display:flex;flex-wrap:wrap;gap:10px}
.pill-anchor{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:999px;
  background:#fff;border:1px solid var(--line);font-size:13px;font-weight:600;color:var(--ink-2);
  transition:border-color .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease);
}
.pill-anchor:hover{border-color:var(--primary);color:var(--primary);box-shadow:var(--sh-sm);transform:translateY(-1px)}

/* ---------- 板块通用 ---------- */
.section{padding:88px 0}
.section--tight{padding:64px 0}
.section--plain{background:var(--surface)}
.section--tint{background:var(--surface-2)}
.section-head{max-width:720px;margin-bottom:40px}
.section-head h2{font-size:clamp(23px,2.4vw,28px);line-height:1.4;margin-bottom:12px}
.section-head p{font-size:15px;line-height:1.9;color:var(--ink-2)}

/* ---------- 信息卡网格 ---------- */
.info-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.info-card{
  display:flex;gap:16px;align-items:flex-start;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px 24px;box-shadow:var(--sh-sm);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.info-card:hover{transform:translateY(-2px);box-shadow:var(--sh-md);border-color:var(--primary-200)}
.info-card:hover h3{color:var(--primary)}
.info-icon{
  width:44px;height:44px;flex:0 0 auto;border-radius:12px;
  background:var(--primary-50);color:var(--primary);
  display:grid;place-items:center;font-size:17px;
  transition:background-color .18s var(--ease),color .18s var(--ease);
}
.info-card:hover .info-icon{background:var(--primary);color:#fff}
.info-card h3{font-size:17px;font-weight:600;line-height:1.5;margin-bottom:4px;transition:color .18s var(--ease)}
.info-card p{font-size:14px;line-height:1.75;color:var(--ink-2)}

/* ---------- 步骤清单 ---------- */
.step-list{counter-reset:step;display:grid;gap:14px}
.step-list li{
  counter-increment:step;display:flex;gap:18px;align-items:flex-start;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px 24px;box-shadow:var(--sh-sm);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.step-list li:hover{transform:translateY(-2px);box-shadow:var(--sh-md);border-color:var(--primary-200)}
.step-list li::before{
  content:counter(step,decimal-leading-zero);
  font-family:Inter,system-ui,sans-serif;font-variant-numeric:tabular-nums;
  font-size:14px;font-weight:700;color:var(--primary);background:var(--primary-50);
  min-width:42px;height:42px;border-radius:10px;display:grid;place-items:center;flex:0 0 auto;
  transition:background-color .18s var(--ease),color .18s var(--ease);
}
.step-list li:hover::before{background:var(--primary);color:#fff}
.step-list p{font-size:15px;line-height:1.85;color:var(--ink-2);margin:0}

/* ---------- 图片与双栏 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split-media{border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-md);background:var(--primary-50);aspect-ratio:16/11}
.split-media img{width:100%;height:100%;object-fit:cover;border-radius:0}
.split-copy h2{font-size:clamp(22px,2.3vw,27px);margin-bottom:16px}
.split-copy p{font-size:15px;line-height:1.9;color:var(--ink-2);margin-bottom:16px}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  background:var(--primary-50);color:var(--primary);font-size:12.5px;font-weight:600;
}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:12px;max-width:880px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:14px;overflow:hidden;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.faq-item:hover{border-color:var(--primary-200);box-shadow:var(--sh-sm)}
.faq-q{
  position:relative;width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;background:none;border:0;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink);line-height:1.6;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:2px;
  background:var(--primary);opacity:0;transition:opacity .2s var(--ease);
}
.faq-item.is-open .faq-q::before{opacity:1}
.faq-q i{color:var(--ink-3);font-size:13px;transition:transform .24s var(--ease),color .2s var(--ease)}
.faq-item.is-open .faq-q i{transform:rotate(180deg);color:var(--primary)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s var(--ease)}
.faq-a-inner{padding:0 22px 20px 22px;font-size:15px;line-height:1.85;color:var(--ink-2)}

/* ---------- 提示条 ---------- */
.notice{
  display:flex;gap:16px;align-items:flex-start;
  background:var(--primary-50);border-left:3px solid var(--primary);
  border-radius:12px;padding:18px 22px;
}
.notice i{color:var(--primary);font-size:16px;margin-top:4px}
.notice p{font-size:14.5px;line-height:1.85;color:var(--primary-700)}

/* ---------- 相关分类 ---------- */
.related-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.related-card{
  display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-sm);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.related-card:hover{transform:translateY(-3px);box-shadow:var(--sh-md);border-color:var(--primary-200)}
.related-card:hover h3{color:var(--primary)}
.related-thumb{aspect-ratio:16/9;background:var(--primary-50);overflow:hidden}
.related-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0}
.related-body{padding:20px 22px 22px}
.related-body h3{font-size:17px;font-weight:600;margin-bottom:8px;transition:color .18s var(--ease)}
.related-body p{font-size:14px;line-height:1.8;color:var(--ink-2);margin-bottom:12px}
.related-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--primary)}

/* ---------- CTA 横带 ---------- */
.cta-band{
  background:var(--primary-700);color:#fff;padding:56px 0;position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(45deg,rgba(255,255,255,.05) 0 1px,transparent 1px 14px);
  pointer-events:none;
}
.cta-band-inner{
  position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;
  gap:32px;flex-wrap:wrap;
}
.cta-band h2{color:#fff;font-size:clamp(21px,2.2vw,26px);margin-bottom:8px}
.cta-band p{color:rgba(255,255,255,.78);font-size:15px;line-height:1.8}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--primary-700);color:rgba(255,255,255,.82);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding-bottom:44px}
.footer-brand .logo-text{color:#fff}
.footer-brand .logo-mark{background:rgba(255,255,255,.14);color:#fff}
.footer-brand p{font-size:14px;line-height:1.9;color:rgba(255,255,255,.72);margin-top:16px;max-width:340px}
.footer-col h3{font-size:15px;font-weight:600;color:#fff;margin-bottom:14px}
.footer-col ul{display:grid;gap:2px}
.footer-col a{
  display:inline-block;font-size:14px;line-height:2;color:rgba(255,255,255,.78);
  transition:color .16s var(--ease);
}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.16);
  padding:20px 0 28px;display:flex;align-items:center;justify-content:space-between;
  gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.62);
}
.footer-links{display:flex;gap:20px}
.footer-links a{color:rgba(255,255,255,.72);font-size:13px}
.footer-links a:hover{color:var(--accent)}

/* ---------- 弹层 ---------- */
.modal-mask{
  position:fixed;inset:0;z-index:120;background:rgba(22,26,25,.55);
  display:none;align-items:center;justify-content:center;padding:24px;
}
.modal-mask.is-open{display:flex}
.modal-panel{
  position:relative;width:100%;max-width:560px;background:#fff;border-radius:20px;
  box-shadow:var(--sh-lg);padding:32px;max-height:90vh;overflow-y:auto;
}
.modal-close{
  position:absolute;top:14px;right:14px;width:36px;height:36px;border-radius:10px;
  border:1px solid var(--line);background:#fff;color:var(--ink-2);display:grid;place-items:center;
  transition:background-color .16s var(--ease),color .16s var(--ease);
}
.modal-close:hover{background:var(--surface-2);color:var(--primary)}
.modal-panel h3{font-size:20px;margin-bottom:8px}
.modal-panel .modal-sub{font-size:14px;line-height:1.8;color:var(--ink-2);margin-bottom:22px}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:6px;color:var(--ink)}
.field .req{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--accent);margin-left:5px;vertical-align:2px}
.field input,.field select,.field textarea{
  width:100%;height:46px;padding:0 14px;border:1px solid var(--line);border-radius:var(--r-input);
  font-size:14px;font-family:inherit;color:var(--ink);background:#fff;
  transition:border-color .16s var(--ease),box-shadow .16s var(--ease);
}
.field textarea{height:auto;padding:12px 14px;line-height:1.8;resize:vertical;min-height:96px}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-50);outline:none;
}
.agree{display:flex;gap:10px;align-items:flex-start;font-size:13px;line-height:1.7;color:var(--ink-2);margin:4px 0 18px}
.agree input{width:16px;height:16px;margin-top:4px;flex:0 0 auto;accent-color:var(--primary)}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .container{padding:0 24px}
  .nav-desktop{display:none}
  .burger{display:flex}
  .section{padding:64px 0}
  .section--tight{padding:48px 0}
  .split{grid-template-columns:1fr;gap:28px}
  .info-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .page-hero{padding:44px 0 36px}
  .page-hero-inner{flex-direction:column;align-items:flex-start;gap:24px}
}
@media (max-width:639px){
  .container{padding:0 20px}
  .header-inner{height:60px}
  .logo-text{font-size:17px}
  .logo-mark{width:30px;height:30px;border-radius:9px}
  .drawer{inset:60px 0 0 0}
  .page-hero h1{font-size:26px;line-height:1.34}
  .section{padding:48px 0}
  .section-head{margin-bottom:28px}
  .info-grid{grid-template-columns:1fr}
  .related-grid{grid-template-columns:1fr}
  .step-list li{padding:16px 18px;gap:14px}
  .step-list li::before{min-width:36px;height:36px;font-size:13px}
  .faq-q{padding:16px 18px;font-size:15px}
  .faq-a-inner{padding:0 18px 18px;font-size:14.5px}
  .cta-band{padding:44px 0}
  .cta-band-inner{flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .modal-panel{padding:24px 20px;border-radius:16px}
}
@media (max-width:520px){
  .nav-cta{display:none}
}