/* roulang page: index */
:root{
  --jade-700:#0E5A55;
  --jade-900:#0A3F3C;
  --jade-500:#2E8579;
  --jade-100:#E3EDEA;
  --sand-500:#C8A254;
  --clay-500:#D2603A;
  --paper:#F6F4EE;
  --paper-2:#FFFFFF;
  --paper-3:#EDF1EC;
  --ink-bg:#10201D;
  --ink-900:#171A19;
  --ink-700:#3A403E;
  --ink-500:#6E7673;
  --line:#E2E0D8;
  --radius-sm:8px;
  --radius-md:14px;
  --radius-lg:20px;
  --shadow-1:0 1px 2px rgba(23,26,25,.04);
  --shadow-2:0 12px 32px rgba(14,90,85,.14);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  font-size:17px;
  line-height:1.88;
  color:var(--ink-700);
  background:var(--paper);
  letter-spacing:.01em;
  font-variant-numeric:tabular-nums;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .22s var(--ease),background-color .22s var(--ease),border-color .22s var(--ease)}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
svg{display:block}
:focus-visible{outline:2px solid var(--jade-700);outline-offset:2px;border-radius:4px}
::selection{background:var(--jade-100);color:var(--jade-900)}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1440px){.container{max-width:1280px}}

/* ---------- 顶部信息条 ---------- */
.site-header{position:sticky;top:0;z-index:60;background:var(--paper-2);transition:box-shadow .22s var(--ease)}
.site-header.is-scrolled{box-shadow:0 6px 20px rgba(23,26,25,.08)}
.topbar{background:var(--ink-bg);color:rgba(255,255,255,.72);font-size:13px;line-height:1.6;letter-spacing:.02em;overflow:hidden;transition:max-height .26s var(--ease),opacity .22s var(--ease);max-height:60px}
.topbar__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:36px;flex-wrap:wrap}
.topbar__note{margin:0}
.topbar__links{display:flex;gap:22px}
.topbar a{color:rgba(255,255,255,.72)}
.topbar a:hover{color:#fff}
.site-header.is-scrolled .topbar{max-height:0;opacity:0}

/* ---------- 导航 ---------- */
.nav{border-bottom:1px solid var(--line)}
.nav__inner{display:flex;align-items:center;gap:28px;min-height:68px;transition:min-height .22s var(--ease)}
.site-header.is-scrolled .nav__inner{min-height:56px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand__mark{width:34px;height:34px;border-radius:9px;background:var(--jade-100);display:flex;align-items:center;justify-content:center;color:var(--jade-700);flex:0 0 34px}
.brand__text{font-size:18px;font-weight:700;letter-spacing:.02em;color:var(--ink-900)}
.brand:hover .brand__text{color:var(--jade-700)}
.nav__list{display:flex;align-items:center;gap:28px;margin-left:auto}
.nav__list a{position:relative;display:inline-block;padding:6px 0;font-size:15px;font-weight:500;color:var(--ink-700)}
.nav__list a::after{content:"";position:absolute;left:50%;right:50%;bottom:0;height:2px;background:var(--jade-700);transition:left .18s var(--ease),right .18s var(--ease)}
.nav__list a:hover{color:var(--jade-700)}
.nav__list a:hover::after{left:0;right:0}
.nav__list a[aria-current="page"]{color:var(--jade-700);font-weight:600}
.nav__list a[aria-current="page"]::after{left:0;right:0}
.nav__cta-mobile{display:none}
.nav__toggle{display:none;width:44px;height:44px;flex:0 0 44px;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:10px;background:var(--paper-2);cursor:pointer;color:var(--ink-900)}
.nav__toggle:hover{border-color:var(--jade-700);color:var(--jade-700)}
.nav__mask{position:fixed;inset:0;background:rgba(16,32,29,.45);opacity:0;visibility:hidden;transition:opacity .26s var(--ease),visibility .26s var(--ease);z-index:85}
.nav__mask.is-open{opacity:1;visibility:visible}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:10px;font-size:15px;font-weight:600;line-height:1.4;border:1px solid transparent;cursor:pointer;text-align:center;transition:background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease)}
.btn--primary{background:var(--jade-700);color:#fff}
.btn--primary:hover{background:var(--jade-900);transform:translateY(-2px);box-shadow:0 10px 24px rgba(14,90,85,.22)}
.btn--primary:active{transform:translateY(0);box-shadow:none}
.btn--ghost{background:transparent;color:var(--jade-700);border-color:rgba(14,90,85,.3)}
.btn--ghost:hover{background:var(--jade-100);border-color:var(--jade-700);transform:translateY(-2px)}
.btn--light{background:var(--paper-2);color:var(--jade-900);border-color:var(--line)}
.btn--light:hover{border-color:var(--jade-700);color:var(--jade-700);transform:translateY(-2px)}
.btn--block{width:100%}
.btn:disabled,.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}
.spinner{width:16px;height:16px;border:2px solid rgba(255,255,255,.4);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite;display:none}
.is-loading .spinner{display:block}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0}
.section--alt{background:var(--paper-3)}
.section__head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:48px;flex-wrap:wrap}
.section__title{position:relative;padding-left:16px;font-size:clamp(26px,2.8vw,34px);line-height:1.3;letter-spacing:-.01em}
.section__title::before{content:"";position:absolute;left:0;top:.4em;width:3px;height:.72em;border-radius:2px;background:var(--jade-700)}
.section__lead{max-width:720px;margin-top:14px;padding-left:16px;color:var(--ink-500);font-size:16px;line-height:1.8}
.badge{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;background:var(--jade-100);color:var(--jade-900);font-size:13px;font-weight:600;letter-spacing:.02em}
.chip{display:inline-block;padding:4px 10px;border-radius:6px;border:1px solid rgba(14,90,85,.35);color:var(--jade-700);background:rgba(227,237,234,.55);font-size:13px;font-weight:600;letter-spacing:.02em}
.arrow-link{display:inline-flex;align-items:center;gap:6px;color:var(--jade-700);font-weight:600;font-size:15px}
.arrow-link svg{transition:transform .22s var(--ease)}
.arrow-link:hover svg{transform:translateX(4px)}
.clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.clamp-3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}

/* ---------- Hero ---------- */
.hero{padding:72px 0 80px;background:var(--paper);position:relative;overflow:hidden}
.hero__inner{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center}
.hero__copy{max-width:640px}
.hero h1{margin:20px 0 0;font-size:clamp(34px,4.4vw,52px);line-height:1.22;letter-spacing:-.01em;font-weight:700}
.hero__sub{margin-top:18px;font-size:18px;line-height:1.75;color:var(--ink-700);max-width:560px}
.hero__actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:32px}
.trust{display:flex;gap:26px;flex-wrap:wrap;margin-top:32px}
.trust li{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-500);letter-spacing:.02em}
.trust svg{color:var(--jade-700);flex:0 0 auto}
.hero__media{position:relative;margin:0;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-2)}
.hero__media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.hero__media::after{content:"";position:absolute;inset:0;background:rgba(14,90,85,.08);pointer-events:none}

/* ---------- 指标看板 ---------- */
.stats{background:var(--ink-bg);color:#fff;padding:88px 0;position:relative;overflow:hidden}
.stats__grid{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:0 32px;border-left:1px solid rgba(255,255,255,.12)}
.stat:first-child{border-left:0;padding-left:0}
.stat__num{font-size:clamp(40px,5vw,64px);font-weight:700;line-height:1;color:#fff;letter-spacing:-.02em}
.stat__num .unit{font-size:18px;font-weight:600;color:var(--sand-500);margin-left:6px;letter-spacing:0}
.stat__label{margin-top:16px;font-size:16px;font-weight:600;color:#fff}
.stat__note{margin-top:6px;font-size:14px;line-height:1.6;color:rgba(255,255,255,.6)}
.stats__foot{margin-top:52px;padding-top:24px;border-top:1px solid rgba(255,255,255,.12);display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:14px;color:rgba(255,255,255,.62)}
.stats__foot a{color:var(--sand-500);font-weight:600}
.stats__foot a:hover{color:#fff}

/* ---------- Bento 服务矩阵 ---------- */
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.bento__item{grid-column:span 12;display:flex;flex-direction:column;gap:14px;padding:32px;background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-md);box-shadow:var(--shadow-1);transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease)}
.bento__item:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:rgba(14,90,85,.28)}
.bento__item h3{font-size:20px;line-height:1.45}
.bento__item p{font-size:15px;line-height:1.8;color:var(--ink-700)}
.bento__item .arrow-link{margin-top:auto}
.bento__icon{width:44px;height:44px;border-radius:12px;background:var(--jade-100);color:var(--jade-700);display:flex;align-items:center;justify-content:center}
.bento__media{margin:0;border-radius:10px;overflow:hidden;background:var(--jade-100)}
.bento__media img{width:100%;height:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s var(--ease)}
.bento__item:hover .bento__media img{transform:scale(1.04)}
.bento__item--5{grid-column:span 5}
.bento__item--7{grid-column:span 7}
.bento__item--4{grid-column:span 4}
.bento__split{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:center}

/* ---------- 对比 ---------- */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.compare__col{padding:32px;border-radius:var(--radius-md);border:1px solid var(--line);background:var(--paper-2);box-shadow:var(--shadow-1)}
.compare__col--good{background:var(--jade-100);border-color:rgba(14,90,85,.2);box-shadow:none}
.compare__col h3{font-size:20px;margin-bottom:8px}
.compare__col > p{font-size:14px;color:var(--ink-500);margin-bottom:24px}
.compare__item{padding:14px 0;border-top:1px solid rgba(23,26,25,.08)}
.compare__item:first-of-type{border-top:0}
.compare__item strong{display:block;font-size:16px;color:var(--ink-900);font-weight:600;margin-bottom:8px}
.compare__bar{height:6px;border-radius:999px;background:rgba(23,26,25,.1);overflow:hidden}
.compare__bar i{display:block;height:100%;border-radius:999px;background:#c4cac6}
.compare__col--good .compare__bar{background:rgba(14,90,85,.16)}
.compare__col--good .compare__bar i{background:var(--jade-700)}
.compare__foot{margin-top:32px;display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.compare__foot p{margin:0;font-size:16px;color:var(--ink-900);font-weight:600}

/* ---------- 最新信息 ---------- */
.posts{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{display:flex;flex-direction:column;gap:14px;padding:20px;background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-md);box-shadow:var(--shadow-1);transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease)}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:rgba(14,90,85,.28)}
.post-card__thumb{margin:0;border-radius:10px;overflow:hidden;background:var(--jade-100)}
.post-card__thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s var(--ease)}
.post-card:hover .post-card__thumb img{transform:scale(1.04)}
.post-card__title{font-size:18px;line-height:1.55}
.post-card:hover .post-card__title{color:var(--jade-700)}
.post-card__sum{font-size:15px;line-height:1.75;color:var(--ink-700)}
.post-card__meta{margin-top:auto;padding-top:16px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:14px;color:var(--ink-500);letter-spacing:.02em}
.post-card__meta .arrow-link{font-size:14px}
.empty{grid-column:1/-1;min-height:180px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;text-align:center;padding:40px 24px;background:var(--paper-2);border:1px dashed var(--line);border-radius:var(--radius-md);color:var(--ink-500)}
.empty svg{color:var(--jade-500)}
.empty p{margin:0;font-size:16px}

/* ---------- FAQ ---------- */
.faq{max-width:860px;margin:0 auto;background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-md);padding:8px 28px;box-shadow:var(--shadow-1)}
.faq__item{position:relative;padding-left:20px;border-bottom:1px solid var(--line)}
.faq__item:last-child{border-bottom:0}
.faq__item::before{content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;border-radius:2px;background:var(--jade-700);opacity:0;transition:opacity .22s var(--ease)}
.faq__item[open]::before{opacity:1}
.faq__item summary{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:60px;padding:18px 0;font-size:17px;font-weight:600;color:var(--ink-900);cursor:pointer;list-style:none;transition:color .22s var(--ease)}
.faq__item summary::-webkit-details-marker{display:none}
.faq__item summary:hover{color:var(--jade-700)}
.faq__item[open] summary{color:var(--jade-700)}
.faq__icon{position:relative;width:16px;height:16px;flex:0 0 16px}
.faq__icon::before,.faq__icon::after{content:"";position:absolute;background:var(--jade-700);border-radius:2px;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.faq__icon::before{left:0;top:7px;width:16px;height:2px}
.faq__icon::after{left:7px;top:0;width:2px;height:16px}
.faq__item[open] .faq__icon::after{transform:rotate(90deg);opacity:0}
.faq__body{padding:0 0 24px;font-size:16px;line-height:1.9;color:var(--ink-700)}

/* ---------- 表单 ---------- */
.contact{background:var(--jade-100);padding:96px 0}
.contact__grid{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:start}
.contact h2{font-size:clamp(26px,2.8vw,34px);line-height:1.3;letter-spacing:-.01em}
.contact__lead{margin-top:16px;font-size:16px;color:var(--ink-700);max-width:420px}
.contact__list{margin-top:32px;display:flex;flex-direction:column;gap:18px}
.contact__list li{display:flex;align-items:flex-start;gap:12px;font-size:15px;color:var(--ink-700)}
.contact__list svg{color:var(--jade-700);flex:0 0 auto;margin-top:4px}
.form-card{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-md);padding:32px;box-shadow:var(--shadow-1)}
.field{margin-bottom:20px}
.field label{display:block;font-size:14px;font-weight:600;color:var(--ink-900);margin-bottom:8px}
.req{color:var(--clay-500);margin-left:2px}
.field input,.field select,.field textarea{width:100%;height:48px;padding:0 14px;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--paper-2);font-size:15px;color:var(--ink-900);transition:border-color .22s var(--ease),box-shadow .22s var(--ease)}
.field textarea{height:auto;min-height:120px;padding:12px 14px;line-height:1.7;resize:vertical}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--ink-500) 50%),linear-gradient(135deg,var(--ink-500) 50%,transparent 50%);background-position:calc(100% - 20px) 21px,calc(100% - 15px) 21px;background-size:5px 5px,5px 5px;background-repeat:no-repeat;padding-right:40px}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--jade-700);box-shadow:0 0 0 3px rgba(14,90,85,.18)}
.field--error input,.field--error select,.field--error textarea{border-color:var(--clay-500)}
.field--error input:focus,.field--error select:focus,.field--error textarea:focus{box-shadow:0 0 0 3px rgba(210,96,58,.18)}
.field__error{display:none;margin-top:6px;font-size:14px;color:var(--clay-500)}
.field--error .field__error{display:block}
.field--check{display:flex;align-items:flex-start;gap:10px}
.field--check input{width:18px;height:18px;flex:0 0 18px;margin-top:4px;accent-color:var(--jade-700)}
.field--check label{margin:0;font-weight:400;font-size:14px;line-height:1.7;color:var(--ink-700)}
.form-note{margin-top:16px;font-size:13px;color:var(--ink-500);line-height:1.7}
.form-success{display:none;align-items:center;gap:10px;margin-bottom:20px;padding:14px 16px;border-radius:var(--radius-sm);background:var(--jade-100);color:var(--jade-900);font-size:15px;font-weight:600}
.form-success.is-visible{display:flex}
.form-success svg{color:var(--jade-700);flex:0 0 auto}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-bg);color:rgba(255,255,255,.7);padding:80px 0 0;position:relative;overflow:hidden}
.footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;position:relative;z-index:2}
.footer__brand{display:inline-flex;align-items:center;gap:10px;margin-bottom:18px}
.footer__brand .brand__mark{background:rgba(255,255,255,.08);color:#fff}
.footer__brand .brand__text{color:#fff}
.footer__desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:320px}
.footer__social{display:flex;gap:14px;margin-top:22px}
.footer__social a{width:38px;height:38px;border-radius:10px;border:1px solid rgba(255,255,255,.16);display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.75)}
.footer__social a:hover{border-color:var(--sand-500);color:#fff}
.footer__title{font-size:15px;font-weight:600;color:#fff;letter-spacing:.02em;margin-bottom:18px}
.footer__links{display:flex;flex-direction:column;gap:12px;font-size:14px}
.footer__links a{color:rgba(255,255,255,.66)}
.footer__links a:hover{color:#fff}
.footer__bottom{margin-top:56px;border-top:1px solid rgba(255,255,255,.12);padding:24px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.5);position:relative;z-index:2}
.footer__wave{position:absolute;left:0;right:0;bottom:0;height:180px;opacity:.06;pointer-events:none}

/* ---------- 回到顶部 ---------- */
.to-top{position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:12px;background:var(--jade-700);color:#fff;display:flex;align-items:center;justify-content:center;border:0;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(10px);box-shadow:0 10px 24px rgba(14,90,85,.3);transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s var(--ease),background-color .22s var(--ease);z-index:80}
.to-top.is-visible{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--jade-900)}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .hero__inner{grid-template-columns:1fr 1fr;gap:40px}
  .bento__item--5{grid-column:span 6}
  .bento__item--7{grid-column:span 6}
  .bento__item--4{grid-column:span 6}
  .posts{grid-template-columns:repeat(2,1fr)}
  .contact__grid{grid-template-columns:1fr;gap:36px}
  .footer__grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
}
@media (max-width:991px){
  .nav__list{position:fixed;top:0;right:0;bottom:0;width:min(86vw,380px);background:var(--paper-2);flex-direction:column;align-items:stretch;gap:0;margin-left:0;padding:88px 24px 120px;transform:translateX(100%);transition:transform .26s var(--ease);z-index:90;box-shadow:-16px 0 40px rgba(23,26,25,.14);overflow-y:auto}
  .nav__list.is-open{transform:translateX(0)}
  .nav__list a{padding:0;font-size:18px;line-height:56px;border-bottom:1px solid var(--line);display:block}
  .nav__list a::after{display:none}
  .nav__cta-mobile{display:block;margin-top:32px;border-bottom:0}
  .nav__cta-mobile a{border-bottom:0;display:inline-flex;width:100%;line-height:1.4;padding:14px 22px;font-size:16px}
  .nav__toggle{display:flex;margin-left:auto}
  .nav__cta{display:none}
  .hero{padding:48px 0 56px}
  .hero__inner{grid-template-columns:1fr;gap:36px}
  .hero__media{order:2}
  .hero__copy{order:1;max-width:none}
  .section{padding:64px 0}
  .stats{padding:64px 0}
  .stats__grid{grid-template-columns:repeat(2,1fr);gap:0}
  .stat{padding:24px 24px;border-left:0;border-top:1px solid rgba(255,255,255,.12)}
  .stat:nth-child(1),.stat:nth-child(2){border-top:0}
  .stat:nth-child(odd){padding-left:0}
  .stat:nth-child(even){border-left:1px solid rgba(255,255,255,.12)}
  .bento__item--5,.bento__item--7,.bento__item--4{grid-column:span 12}
  .bento__split{grid-template-columns:1fr}
  .compare{grid-template-columns:1fr}
  .contact{padding:64px 0}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px}
  .site-footer{padding-top:64px}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 20px}
  .hero h1{font-size:clamp(28px,7vw,36px)}
  .hero__sub{font-size:16px}
  .hero__actions{gap:12px}
  .hero__actions .btn{flex:1 1 100%}
  .trust{gap:16px}
  .posts{grid-template-columns:1fr}
  .section__head{margin-bottom:32px}
  .section__title{padding-left:14px}
  .section__lead{padding-left:14px}
  .bento__item{padding:24px}
  .faq{padding:4px 20px}
  .form-card{padding:24px}
  .field input,.field select,.field textarea{height:52px}
  .field textarea{height:auto;min-height:130px}
  .btn{min-height:48px}
  .to-top{right:16px;bottom:16px}
}
@media (max-width:519px){
  .stats__grid{grid-template-columns:1fr}
  .stat{padding:24px 0;border-left:0;border-top:1px solid rgba(255,255,255,.12)}
  .stat:nth-child(2){border-top:1px solid rgba(255,255,255,.12)}
  .stat:nth-child(even){border-left:0}
  .footer__grid{grid-template-columns:1fr}
  .footer__bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important}
  html{scroll-behavior:auto}
}

/* roulang page: article */
:root{
  --jade-700:#0E5A55;
  --jade-900:#0A3F3C;
  --jade-500:#2E8579;
  --jade-100:#E3EDEA;
  --sand-500:#C8A254;
  --clay-500:#D2603A;
  --paper:#F6F4EE;
  --paper-2:#FFFFFF;
  --paper-3:#EDF1EC;
  --ink-bg:#10201D;
  --ink-900:#171A19;
  --ink-700:#3A403E;
  --ink-500:#6E7673;
  --line:#E2E0D8;
  --radius-s:8px;
  --radius-m:14px;
  --radius-l:20px;
  --shadow-1:0 1px 2px rgba(23,26,25,.04);
  --shadow-2:0 12px 32px rgba(14,90,85,.14);
  --font:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--font);font-size:17px;line-height:1.85;letter-spacing:.01em;color:var(--ink-700);background:var(--paper)}
img{max-width:100%;display:block;height:auto}
a{color:var(--jade-700);text-decoration:none;transition:color .22s var(--ease)}
a:hover{color:var(--jade-900)}
button{font:inherit}
ul,ol{margin:0;padding:0}
h1,h2,h3,h4,p{margin:0}
table{max-width:100%}
:focus-visible{outline:2px solid var(--jade-700);outline-offset:2px;border-radius:4px}
[hidden]{display:none !important}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1440px){.container{max-width:1280px}}

/* ============ 顶部信息条 ============ */
.topbar{background:var(--ink-bg);color:rgba(255,255,255,.72);font-size:13px;line-height:1.6;letter-spacing:.02em}
.topbar__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:36px}
.topbar__note{margin:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar__links{display:flex;align-items:center;gap:18px}
.topbar__links a{color:rgba(255,255,255,.72)}
.topbar__links a:hover{color:#fff}

/* ============ 导航 ============ */
.nav{position:sticky;top:0;z-index:60;background:var(--paper-2);border-bottom:1px solid var(--line);transition:box-shadow .22s var(--ease)}
.nav__inner{display:flex;align-items:center;gap:24px;height:68px;transition:height .22s var(--ease)}
.site-header.is-scrolled .nav{box-shadow:0 6px 20px rgba(23,26,25,.08)}
.site-header.is-scrolled .nav__inner{height:56px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink-900);font-weight:700;font-size:18px;letter-spacing:.02em;white-space:nowrap}
.brand:hover{color:var(--jade-700)}
.brand__mark{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:10px;background:var(--jade-100);color:var(--jade-700);flex:none}
.nav__list{display:flex;align-items:center;gap:4px;list-style:none;margin-left:auto}
.nav__list a{position:relative;display:inline-block;padding:10px 14px;font-size:15px;font-weight:500;color:var(--ink-700);border-radius:var(--radius-s)}
.nav__list a::after{content:"";position:absolute;left:50%;right:50%;bottom:3px;height:2px;background:var(--jade-700);transition:left .18s var(--ease),right .18s var(--ease)}
.nav__list a:hover{color:var(--jade-700)}
.nav__list a:hover::after,.nav__list a[aria-current="page"]::after{left:14px;right:14px}
.nav__list a[aria-current="page"]{color:var(--jade-700);font-weight:600}
.nav__cta{flex:none}
.nav__cta-mobile{display:none}
.nav__toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;background:var(--paper-2);color:var(--ink-900);border:1px solid var(--line);border-radius:10px;cursor:pointer;margin-left:auto;transition:border-color .22s var(--ease),color .22s var(--ease)}
.nav__toggle:hover{border-color:var(--jade-700);color:var(--jade-700)}
.nav-mask{position:fixed;inset:0;background:rgba(16,32,29,.42);z-index:70;opacity:0;pointer-events:none;transition:opacity .26s var(--ease)}
.nav-mask.is-open{opacity:1;pointer-events:auto}
body.nav-open{overflow:hidden}

/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;font-size:15px;font-weight:600;line-height:1.2;border-radius:10px;border:1px solid transparent;cursor:pointer;transition:background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease),transform .22s var(--ease);text-align:center}
.btn--primary{background:var(--jade-700);color:#fff;box-shadow:0 1px 2px rgba(14,90,85,.2)}
.btn--primary:hover{background:var(--jade-900);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-2)}
.btn--primary:active{transform:translateY(0)}
.btn--ghost{background:var(--paper-2);color:var(--jade-700);border-color:var(--line)}
.btn--ghost:hover{border-color:var(--jade-700);color:var(--jade-700);background:var(--jade-100)}
.btn--block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}
.btn__spin{width:16px;height:16px;animation:spin 900ms linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important;scroll-behavior:auto !important}
}

/* ============ 通用板块 ============ */
.section{padding:96px 0}
.section--alt{background:var(--paper-3)}
.section--tight{padding:64px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.section-title{position:relative;padding-left:16px;font-size:clamp(26px,2.8vw,34px);line-height:1.3;font-weight:700;color:var(--ink-900);letter-spacing:-.01em}
.section-title::before{content:"";position:absolute;left:0;top:.22em;width:3px;height:18px;background:var(--jade-700);border-radius:2px}
.section-sub{margin-top:12px;font-size:15px;color:var(--ink-500);max-width:640px}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--jade-700);white-space:nowrap}
.link-more:hover{gap:10px}
.badge{display:inline-flex;align-items:center;padding:4px 10px;font-size:13px;font-weight:600;line-height:1.6;letter-spacing:.02em;color:var(--jade-700);background:var(--paper-2);border:1px solid var(--jade-500);border-radius:6px}
.badge--light{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.42);color:#fff}

/* ============ 文章头部 ============ */
.article-hero{position:relative;padding:36px 0 64px;background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;color:#fff}
.article-hero::before{content:"";position:absolute;inset:0;background:rgba(10,63,60,.88)}
.article-hero .container{position:relative;z-index:1}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;letter-spacing:.02em;color:rgba(255,255,255,.72);margin-bottom:24px}
.breadcrumb a{color:rgba(255,255,255,.78)}
.breadcrumb a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.breadcrumb span[aria-current="page"]{color:#fff}
.article-hero h1{margin:20px 0 0;max-width:900px;font-size:clamp(30px,3.6vw,46px);line-height:1.24;font-weight:700;letter-spacing:-.01em;color:#fff}
.article-hero__lead{margin-top:18px;max-width:680px;font-size:16px;line-height:1.85;color:rgba(255,255,255,.82)}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 20px;margin-top:26px;font-size:14px;letter-spacing:.02em;color:rgba(255,255,255,.78)}
.article-meta__item{display:inline-flex;align-items:center;gap:8px}
.article-meta__dot{width:5px;height:5px;border-radius:50%;background:var(--sand-500);flex:none}

/* ============ 文章布局 ============ */
.article-section{padding:72px 0 88px}
.article-layout{display:grid;grid-template-columns:minmax(0,760px) 280px;gap:56px;justify-content:center;align-items:start}
.article-main{min-width:0}
.article-cover{margin:0 0 40px}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--radius-m);border:1px solid var(--line)}
.article-cover figcaption{margin-top:12px;font-size:13px;text-align:center;color:var(--ink-500)}
.article-body{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-m);box-shadow:var(--shadow-1);padding:48px 44px}
.article-empty{padding:24px 0;text-align:center}
.article-empty__icon{display:inline-flex;align-items:center;justify-content:center;width:64px;height:64px;border-radius:50%;background:var(--jade-100);color:var(--jade-700);margin-bottom:20px}
.article-empty h2{font-size:22px;color:var(--ink-900);margin-bottom:12px}
.article-empty p{font-size:16px;color:var(--ink-500);max-width:520px;margin:0 auto 24px}
.article-foot{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:32px;padding-top:24px;border-top:1px solid var(--line);font-size:14px;color:var(--ink-500)}

/* ============ 正文排版 ============ */
.prose{max-width:720px;margin:0 auto;font-size:17px;line-height:1.9;color:var(--ink-700)}
.prose h2{margin:56px 0 16px;padding-left:14px;border-left:3px solid var(--jade-700);font-size:clamp(22px,2.2vw,26px);line-height:1.35;font-weight:700;color:var(--ink-900)}
.prose h2:first-child{margin-top:0}
.prose h3{margin:32px 0 12px;font-size:20px;line-height:1.45;font-weight:600;color:var(--ink-900)}
.prose h4{margin:24px 0 10px;font-size:17px;font-weight:600;color:var(--ink-900)}
.prose p{margin:0 0 1.1em}
.prose ul,.prose ol{margin:0 0 1.1em;padding-left:1.4em}
.prose li{margin-bottom:10px}
.prose li::marker{color:var(--jade-700)}
.prose strong{color:var(--ink-900)}
.prose a{color:var(--jade-700);text-decoration:underline;text-underline-offset:4px}
.prose img{border-radius:var(--radius-m);margin:24px 0}
.prose blockquote{margin:24px 0;padding:16px 20px;border-left:3px solid var(--sand-500);background:var(--paper-3);border-radius:0 10px 10px 0;font-style:normal}
.prose blockquote p:last-child{margin-bottom:0}
.prose table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px}
.prose th,.prose td{border:1px solid var(--line);padding:10px 14px;text-align:left;line-height:1.7}
.prose th{background:var(--paper-3);color:var(--ink-900);font-weight:600}
.prose code{background:var(--paper-3);padding:2px 6px;border-radius:6px;font-size:15px}
.prose hr{border:0;border-top:1px solid var(--line);margin:40px 0}

/* ============ 侧栏 ============ */
.article-aside{position:sticky;top:92px;display:grid;gap:20px;align-content:start}
.side-card{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-m);box-shadow:var(--shadow-1);padding:22px}
.side-card__title{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:600;letter-spacing:.02em;color:var(--ink-900);margin-bottom:14px}
.side-card__title::before{content:"";width:3px;height:14px;background:var(--jade-700);border-radius:2px}
.toc{display:grid;gap:2px;max-height:46vh;overflow-y:auto}
.toc__link{display:block;padding:7px 10px;font-size:14px;line-height:1.6;color:var(--ink-700);border-left:2px solid transparent;border-radius:0 8px 8px 0}
.toc__link:hover{color:var(--jade-700);background:var(--jade-100)}
.toc__link.is-active{color:var(--jade-700);border-left-color:var(--jade-700);background:var(--jade-100);font-weight:600}
.toc__link--sub{padding-left:22px;font-size:13px;color:var(--ink-500)}
.toc__empty{font-size:14px;color:var(--ink-500)}
.side-actions{display:grid;gap:10px}
.side-card__note{margin-top:14px;font-size:13px;line-height:1.7;color:var(--ink-500)}

/* ============ 相关推荐 ============ */
.reco-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.reco-card{display:flex;flex-direction:column;gap:12px;padding:24px;background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-m);box-shadow:var(--shadow-1);transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease)}
.reco-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:var(--jade-100)}
.reco-card__top{display:flex;align-items:center;justify-content:space-between;gap:12px}
.reco-card__time{font-size:13px;color:var(--ink-500);font-variant-numeric:tabular-nums}
.reco-card h3{font-size:19px;line-height:1.45;font-weight:600;color:var(--ink-900)}
.reco-card:hover h3{color:var(--jade-700)}
.reco-card p{font-size:15px;line-height:1.75;color:var(--ink-500)}
.reco-card__more{margin-top:auto;display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--jade-700)}

/* ============ 表单 ============ */
.section--cta{background:var(--jade-100)}
.cta-layout{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.cta-copy .section-title{margin-bottom:16px}
.cta-copy p{font-size:16px;line-height:1.85;color:var(--ink-700);max-width:520px}
.contact-list{list-style:none;margin:28px 0 0;display:grid;gap:14px}
.contact-list li{display:flex;align-items:flex-start;gap:12px;font-size:15px;line-height:1.7;color:var(--ink-700)}
.contact-list svg{flex:none;margin-top:4px;color:var(--jade-700)}
.form-card{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-m);box-shadow:var(--shadow-1);padding:32px}
.field{margin-bottom:20px}
.field label{display:block;margin-bottom:8px;font-size:14px;font-weight:600;color:var(--ink-900)}
.field .req{color:var(--jade-700)}
.field input,.field select,.field textarea{width:100%;padding:0 14px;height:48px;font-family:var(--font);font-size:15px;color:var(--ink-900);background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-s);transition:border-color .22s var(--ease),box-shadow .22s var(--ease)}
.field textarea{height:auto;padding:12px 14px;line-height:1.75;resize:vertical;min-height:120px}
.field select{appearance:none;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%236E7673' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:40px}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--jade-700);box-shadow:0 0 0 3px rgba(14,90,85,.16)}
.field.has-error input,.field.has-error select,.field.has-error textarea{border-color:var(--clay-500)}
.field__error{display:none;margin-top:6px;font-size:13px;line-height:1.6;color:var(--clay-500)}
.field.has-error .field__error{display:block}
.check{display:flex;align-items:flex-start;gap:10px;font-size:14px;line-height:1.7;color:var(--ink-700)}
.check input{width:18px;height:18px;margin:3px 0 0;accent-color:var(--jade-700);flex:none}
.form-note{margin-top:14px;font-size:13px;line-height:1.7;color:var(--ink-500)}
.form-status{display:none;align-items:center;gap:10px;margin-bottom:18px;padding:12px 14px;font-size:14px;line-height:1.7;color:var(--jade-900);background:var(--jade-100);border-radius:var(--radius-s)}
.form-status.is-visible{display:flex}

/* ============ 页脚 ============ */
.site-footer{position:relative;overflow:hidden;background:var(--ink-bg);color:rgba(255,255,255,.72);padding-top:72px}
.footer__wave{position:absolute;inset:0;width:100%;height:100%;opacity:.06;pointer-events:none}
.footer__grid{position:relative;display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.footer__brand{color:#fff;font-weight:700;font-size:18px}
.footer__brand:hover{color:#fff}
.footer__desc{margin-top:16px;font-size:14px;line-height:1.8;max-width:300px}
.footer__social{display:flex;gap:12px;margin-top:20px}
.footer__social a{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:10px;border:1px solid rgba(255,255,255,.18);color:rgba(255,255,255,.78)}
.footer__social a:hover{border-color:var(--jade-500);color:#fff;background:rgba(46,133,121,.24)}
.footer__title{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px}
.footer__links{display:grid;gap:10px}
.footer__links a{font-size:14px;color:rgba(255,255,255,.72)}
.footer__links a:hover{color:#fff}
.footer__note{font-size:14px;line-height:1.8}
.footer__subscribe{display:flex;gap:10px;margin-top:16px}
.footer__subscribe input{flex:1;min-width:0;height:44px;padding:0 12px;font-size:14px;color:#fff;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.18);border-radius:var(--radius-s)}
.footer__subscribe input::placeholder{color:rgba(255,255,255,.45)}
.footer__subscribe input:focus{outline:none;border-color:var(--jade-500);box-shadow:0 0 0 3px rgba(46,133,121,.24)}
.footer__bottom{position:relative;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding:20px 0;border-top:1px solid rgba(255,255,255,.12);font-size:13px;line-height:1.7;color:rgba(255,255,255,.6)}
.footer__bottom a{color:rgba(255,255,255,.7)}
.footer__bottom a:hover{color:#fff}
.to-top{position:fixed;right:24px;bottom:24px;z-index:65;display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;background:var(--jade-700);color:#fff;border:0;border-radius:12px;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .22s var(--ease),transform .22s var(--ease),background-color .22s var(--ease),visibility .22s}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--jade-900)}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:32px}
  .article-aside{position:static;grid-template-columns:1fr 1fr}
  .toc{max-height:none}
  .reco-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:991px){
  .nav__list{position:fixed;top:0;right:0;bottom:0;width:min(88vw,360px);z-index:80;margin:0;padding:88px 24px 28px;flex-direction:column;align-items:stretch;gap:0;background:var(--paper-2);box-shadow:-16px 0 40px rgba(23,26,25,.16);transform:translateX(100%);transition:transform .26s var(--ease);overflow-y:auto}
  .nav__list.is-open{transform:translateX(0)}
  .nav__list li{width:100%}
  .nav__list a{display:flex;align-items:center;width:100%;height:56px;padding:0;font-size:18px;border-bottom:1px solid var(--line);border-radius:0}
  .nav__list a::after{display:none}
  .nav__cta{display:none}
  .nav__cta-mobile{display:block;margin-top:24px}
  .nav__cta-mobile a{height:auto;border-bottom:0;color:#fff}
  .nav__toggle{display:inline-flex}
  .section{padding:64px 0}
  .article-hero{padding:28px 0 48px}
  .article-section{padding:48px 0 64px}
  .cta-layout{grid-template-columns:1fr;gap:36px}
  .article-body{padding:32px 24px}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:28px}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 20px}
  .topbar__note{font-size:12px}
  .topbar__links{display:none}
  .article-aside{grid-template-columns:1fr}
  .reco-grid{grid-template-columns:1fr}
  .footer__grid{grid-template-columns:1fr;gap:28px;padding-bottom:36px}
  .article-hero h1{font-size:clamp(24px,6vw,30px)}
  .form-card{padding:24px 20px}
  .field input,.field select,.field textarea{height:52px}
  .field textarea{height:auto}
  .btn{min-height:48px}
  .to-top{right:16px;bottom:16px}
}
@media (max-width:480px){
  .article-body{padding:24px 18px;border-radius:var(--radius-s)}
  .prose{font-size:16px}
  .section{padding:56px 0}
  .side-card{padding:18px}
}

/* roulang page: category1 */
:root{
  --jade-700:#0E5A55;
  --jade-900:#0A3F3C;
  --jade-500:#2E8579;
  --jade-100:#E3EDEA;
  --sand-500:#C8A254;
  --clay-500:#D2603A;
  --paper:#F6F4EE;
  --paper-2:#FFFFFF;
  --paper-3:#EDF1EC;
  --ink-bg:#10201D;
  --ink-900:#171A19;
  --ink-700:#3A403E;
  --ink-500:#6E7673;
  --line:#E2E0D8;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --shadow-1:0 1px 2px rgba(23,26,25,.04);
  --shadow-2:0 12px 32px rgba(14,90,85,.14);
  --ease:220ms cubic-bezier(.2,.7,.3,1);
  --sp-1:4px; --sp-2:8px; --sp-3:12px; --sp-4:16px; --sp-5:24px;
  --sp-6:32px; --sp-7:48px; --sp-8:64px; --sp-9:96px; --sp-10:120px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:110px;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  font-size:17px;
  line-height:1.88;
  letter-spacing:.01em;
  color:var(--ink-700);
  background:var(--paper);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
svg{display:block;}
a{color:var(--jade-700);text-decoration:none;transition:color var(--ease),opacity var(--ease);}
a:hover{color:var(--jade-500);}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{
  outline:2px solid var(--jade-700);
  outline-offset:2px;
  border-radius:4px;
}
h1,h2,h3,h4{margin:0;color:var(--ink-900);letter-spacing:-.01em;}
p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0 0 1.1em;padding-left:1.25em;}
li{margin-bottom:10px;}
li:last-child{margin-bottom:0;}
img,iframe,table{max-width:100%;}
button{font-family:inherit;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section--tight{padding:72px 0;}
.section--alt{background:var(--paper-3);}
.section__head{margin-bottom:48px;max-width:780px;}
.section__eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.08em;color:var(--jade-700);
  font-weight:600;margin-bottom:14px;
}
.section__eyebrow::before{content:"";width:3px;height:16px;background:var(--jade-700);border-radius:2px;}
.section__title{
  font-size:clamp(26px,2.8vw,34px);
  line-height:1.3;
  font-weight:700;
  margin-bottom:16px;
  display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;
}
.section__title .num{
  font-size:14px;color:var(--sand-500);font-weight:700;letter-spacing:.12em;
}
.section__desc{max-width:720px;color:var(--ink-700);}
.lead{font-size:18px;line-height:1.85;}

/* ============ 顶栏与导航 ============ */
.site-header{position:sticky;top:0;z-index:60;}
.topbar{background:var(--ink-bg);color:rgba(255,255,255,.72);font-size:13px;line-height:1.6;letter-spacing:.02em;}
.topbar__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:36px;}
.topbar__note{margin:0;font-size:13px;}
.topbar__links{display:flex;gap:20px;}
.topbar__links a{color:rgba(255,255,255,.78);font-size:13px;}
.topbar__links a:hover{color:#fff;}
.nav{
  background:var(--paper-2);
  border-bottom:1px solid var(--line);
  transition:height var(--ease),box-shadow var(--ease);
}
.site-header.is-stuck .nav{box-shadow:0 6px 20px rgba(23,26,25,.08);}
.nav__inner{display:flex;align-items:center;gap:32px;height:68px;transition:height var(--ease);}
.site-header.is-stuck .nav__inner{height:56px;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink-900);flex:none;}
.brand:hover{color:var(--jade-700);}
.brand__mark{
  width:34px;height:34px;border-radius:10px;
  display:grid;place-items:center;
  background:var(--jade-100);color:var(--jade-700);flex:none;
}
.brand__text{font-size:18px;font-weight:700;letter-spacing:.02em;color:inherit;}
.nav__list{
  display:flex;align-items:center;gap:6px;
  list-style:none;margin:0 0 0 auto;padding:0;
}
.nav__list li{margin:0;}
.nav__list a{
  position:relative;
  display:inline-block;
  padding:10px 14px;
  font-size:15px;font-weight:500;
  color:var(--ink-700);
  border-radius:8px;
}
.nav__list a::after{
  content:"";position:absolute;left:50%;right:50%;bottom:4px;height:2px;
  background:var(--jade-700);border-radius:2px;
  transition:left var(--ease),right var(--ease);
}
.nav__list a:hover{color:var(--jade-700);}
.nav__list a:hover::after,.nav__list a[aria-current="page"]::after{left:14px;right:14px;}
.nav__list a[aria-current="page"]{color:var(--jade-700);font-weight:600;}
.nav__cta{flex:none;}
.nav__cta-mobile{display:none;}
.nav__toggle{
  display:none;width:44px;height:44px;
  align-items:center;justify-content:center;
  background:var(--paper-2);color:var(--ink-900);
  border:1px solid var(--line);border-radius:10px;cursor:pointer;
  transition:background var(--ease),border-color var(--ease);
}
.nav__toggle:hover{background:var(--jade-100);border-color:var(--jade-500);}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:10px;
  font-size:15px;font-weight:600;line-height:1.2;
  border:1px solid transparent;cursor:pointer;
  transition:background var(--ease),color var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease);
  text-align:center;
}
.btn:active{transform:translateY(1px);}
.btn--primary{background:var(--jade-700);color:#fff;}
.btn--primary:hover{background:var(--jade-900);color:#fff;box-shadow:var(--shadow-2);}
.btn--ghost{background:transparent;color:var(--jade-700);border-color:var(--jade-700);}
.btn--ghost:hover{background:var(--jade-100);color:var(--jade-900);}
.btn--light{background:var(--paper-2);color:var(--jade-700);border-color:var(--line);}
.btn--light:hover{background:var(--jade-100);color:var(--jade-900);}
.btn--block{width:100%;}
.btn[disabled],.btn.is-loading{opacity:.4;cursor:not-allowed;box-shadow:none;}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:15px;font-weight:600;color:var(--jade-700);
}
.link-arrow svg{transition:transform var(--ease);}
.link-arrow:hover svg{transform:translateX(4px);}
.text-link{font-weight:600;text-decoration:underline;text-underline-offset:4px;}

/* ============ 面包屑 ============ */
.crumbs{background:var(--paper-2);border-bottom:1px solid var(--line);}
.crumbs__inner{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  padding:14px 24px;font-size:13px;color:var(--ink-500);letter-spacing:.02em;
  max-width:1200px;margin:0 auto;
}
.crumbs__inner a{color:var(--ink-500);}
.crumbs__inner a:hover{color:var(--jade-700);}
.crumbs__sep{color:var(--line);}
.crumbs__current{color:var(--ink-700);font-weight:600;}

/* ============ 分类 Hero ============ */
.cat-hero{position:relative;overflow:hidden;background:var(--jade-900);color:#fff;padding:88px 0 96px;}
.cat-hero__bg{
  position:absolute;inset:0;width:100%;height:100%;
  object-fit:cover;opacity:.34;
}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(10,63,60,.94) 8%,rgba(16,32,29,.72) 62%,rgba(16,32,29,.55) 100%);
}
.cat-hero__inner{position:relative;z-index:2;max-width:760px;}
.cat-hero__tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  border:1px solid rgba(255,255,255,.28);
  font-size:13px;letter-spacing:.06em;color:rgba(255,255,255,.9);
  margin-bottom:22px;
}
.cat-hero h1{
  font-size:clamp(34px,4.4vw,52px);
  line-height:1.22;font-weight:700;color:#fff;margin-bottom:18px;
}
.cat-hero__sub{
  font-size:18px;line-height:1.8;color:rgba(255,255,255,.82);
  max-width:620px;margin-bottom:28px;
}
.cat-hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px;}
.cat-hero .btn--ghost{color:#fff;border-color:rgba(255,255,255,.5);}
.cat-hero .btn--ghost:hover{background:rgba(255,255,255,.12);color:#fff;}
.cat-hero__facts{
  display:flex;flex-wrap:wrap;gap:12px 32px;list-style:none;margin:0;padding:0;
}
.cat-hero__facts li{
  display:flex;align-items:center;gap:8px;margin:0;
  font-size:14px;color:rgba(255,255,255,.78);
}
.cat-hero__facts svg{color:var(--sand-500);flex:none;}

/* ============ 文档式布局 ============ */
.doc-layout{
  display:grid;
  grid-template-columns:220px minmax(0,1fr);
  gap:56px;
  align-items:start;
}
.doc-aside{position:sticky;top:104px;align-self:start;}
.doc-aside__title{
  font-size:13px;letter-spacing:.08em;color:var(--ink-500);
  font-weight:600;margin-bottom:14px;
}
.doc-aside ul{list-style:none;margin:0;padding:0;border-left:1px solid var(--line);}
.doc-aside li{margin:0;}
.doc-aside a{
  display:block;padding:9px 0 9px 16px;
  font-size:15px;color:var(--ink-700);
  border-left:2px solid transparent;margin-left:-1px;
  transition:color var(--ease),border-color var(--ease),background var(--ease);
}
.doc-aside a:hover{color:var(--jade-700);border-left-color:var(--jade-500);background:linear-gradient(90deg,var(--jade-100),transparent 85%);}
.doc-aside a.is-active{color:var(--jade-700);font-weight:600;border-left-color:var(--jade-700);}
.doc-aside__card{
  margin-top:28px;padding:20px;
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--shadow-1);font-size:14px;line-height:1.75;color:var(--ink-700);
}
.doc-aside__card strong{display:block;color:var(--ink-900);font-size:15px;margin-bottom:8px;}

.doc-main{max-width:760px;}
.doc-block{
  background:var(--paper-2);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:32px;
  box-shadow:var(--shadow-1);
  margin-bottom:24px;
  transition:box-shadow var(--ease),transform var(--ease);
}
.doc-block:hover{box-shadow:var(--shadow-2);transform:translateY(-3px);}
.doc-block__head{display:flex;align-items:flex-start;gap:16px;margin-bottom:16px;}
.doc-block__num{
  flex:none;width:38px;height:38px;border-radius:10px;
  display:grid;place-items:center;
  background:var(--jade-100);color:var(--jade-700);
  font-size:14px;font-weight:700;letter-spacing:.02em;
}
.doc-block h3{font-size:21px;line-height:1.45;font-weight:600;}
.doc-block p{color:var(--ink-700);}
.doc-block ul{margin-top:4px;}
.doc-block li::marker{color:var(--jade-700);}
.doc-block__foot{margin-top:20px;padding-top:16px;border-top:1px dashed var(--line);}
.note{
  margin-top:18px;padding:14px 18px;
  background:var(--paper-3);border-left:3px solid var(--sand-500);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  font-size:15px;line-height:1.8;color:var(--ink-700);
}
.note strong{color:var(--ink-900);}

/* ============ 图文区 ============ */
.figure-block{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:0;background:var(--paper-2);
  border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;box-shadow:var(--shadow-1);
  margin:32px 0 24px;
}
.figure-block__media{position:relative;min-height:280px;}
.figure-block__media img{width:100%;height:100%;object-fit:cover;border-radius:0;}
.figure-block__body{padding:32px;}
.figure-block__body h3{font-size:20px;margin-bottom:12px;}
.figure-block__body p{font-size:16px;}

/* ============ 指标带 ============ */
.metrics{background:var(--ink-bg);color:#fff;padding:72px 0;}
.metrics__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-bottom:28px;}
.metric{padding:8px 28px;border-left:1px solid rgba(255,255,255,.12);}
.metric:first-child{border-left:0;padding-left:0;}
.metric__value{
  font-size:clamp(34px,4vw,52px);font-weight:700;line-height:1.1;
  color:#fff;display:flex;align-items:baseline;gap:6px;
}
.metric__unit{font-size:15px;font-weight:500;color:rgba(255,255,255,.68);}
.metric__label{font-size:14px;color:rgba(255,255,255,.86);margin-top:8px;font-weight:600;}
.metric__note{font-size:13px;color:rgba(255,255,255,.55);line-height:1.6;margin-top:4px;}
.metrics__foot{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  font-size:14px;color:rgba(255,255,255,.65);
  border-top:1px solid rgba(255,255,255,.12);padding-top:22px;
}
.metrics__foot a{color:rgba(255,255,255,.9);text-decoration:underline;text-underline-offset:4px;}

/* ============ 提示条 ============ */
.compare{margin-top:32px;}
.compare__grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.compare__col{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-md);
  padding:26px;box-shadow:var(--shadow-1);
}
.compare__col h3{font-size:18px;margin-bottom:18px;}
.compare__col--good{background:var(--jade-100);border-color:rgba(14,90,85,.24);}
.compare__list{list-style:none;margin:0;padding:0;}
.compare__list li{
  position:relative;padding-left:18px;margin-bottom:16px;
  font-size:15px;line-height:1.7;color:var(--ink-700);
}
.compare__list li::before{
  content:"";position:absolute;left:0;top:10px;
  width:6px;height:6px;border-radius:50%;background:var(--ink-500);
}
.compare__col--good .compare__list li{padding-left:16px;border-left:3px solid var(--jade-700);}
.compare__col--good .compare__list li::before{left:-1px;top:12px;background:var(--jade-700);}
.compare__bar{height:4px;border-radius:2px;background:var(--line);margin-top:8px;overflow:hidden;}
.compare__bar span{display:block;height:100%;background:var(--ink-500);}
.compare__col--good .compare__bar span{background:var(--jade-700);}
.compare__foot{
  margin-top:28px;display:flex;flex-wrap:wrap;align-items:center;gap:16px;justify-content:space-between;
  font-size:15px;color:var(--ink-700);
}

/* ============ 标签 ============ */
.tags{display:flex;flex-wrap:wrap;gap:10px;list-style:none;margin:0;padding:0;}
.tags li{margin:0;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 12px;border-radius:6px;
  border:1px solid var(--jade-500);
  color:var(--jade-700);font-size:13px;font-weight:600;letter-spacing:.02em;
  background:rgba(227,237,234,.5);
}
.badge{
  display:inline-block;padding:4px 10px;border-radius:6px;
  background:var(--jade-100);color:var(--jade-700);
  font-size:12px;font-weight:600;letter-spacing:.04em;
}

/* ============ FAQ ============ */
.faq{max-width:840px;}
.faq__item{border-bottom:1px solid var(--line);}
.faq__item:first-child{border-top:1px solid var(--line);}
.faq__item summary{
  position:relative;list-style:none;cursor:pointer;
  padding:22px 52px 22px 0;
  font-size:17px;font-weight:600;color:var(--ink-900);line-height:1.6;
  transition:color var(--ease);
}
.faq__item summary::-webkit-details-marker{display:none;}
.faq__item summary:hover{color:var(--jade-700);}
.faq__item summary::before{
  content:"";position:absolute;left:-16px;top:24px;bottom:24px;width:3px;
  background:var(--jade-700);border-radius:2px;opacity:0;transition:opacity var(--ease);
}
.faq__item[open] summary::before{opacity:1;}
.faq__icon{
  position:absolute;right:0;top:50%;width:22px;height:22px;margin-top:-11px;
  color:var(--jade-700);transition:transform var(--ease);
}
.faq__item[open] .faq__icon{transform:rotate(45deg);}
.faq__body{padding:0 0 26px 20px;font-size:16px;line-height:1.9;color:var(--ink-700);}

/* ============ 表单区 ============ */
.cta{background:var(--jade-100);}
.cta__grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:56px;align-items:start;}
.cta__info h2{font-size:clamp(26px,2.8vw,34px);line-height:1.3;margin-bottom:16px;}
.cta__info p{max-width:520px;}
.cta__contact{list-style:none;margin:28px 0 0;padding:0;}
.cta__contact li{display:flex;align-items:flex-start;gap:12px;margin-bottom:16px;font-size:15px;color:var(--ink-700);}
.cta__contact svg{color:var(--jade-700);flex:none;margin-top:4px;}
.cta__contact strong{color:var(--ink-900);display:block;font-weight:600;}

.form-card{
  background:var(--paper-2);border-radius:var(--r-md);
  padding:32px;box-shadow:0 12px 32px rgba(14,90,85,.10);
  border:1px solid rgba(14,90,85,.10);
}
.field{margin-bottom:18px;}
.field label{display:block;font-size:14px;font-weight:600;color:var(--ink-900);margin-bottom:8px;}
.field .req{color:var(--jade-700);margin-left:2px;}
.field input,.field select,.field textarea{
  width:100%;height:48px;padding:0 14px;
  font-size:15px;color:var(--ink-900);font-family:inherit;
  background:var(--paper);border:1px solid var(--line);border-radius:var(--r-sm);
  transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
}
.field textarea{height:auto;min-height:120px;padding:12px 14px;line-height:1.75;resize:vertical;}
.field select{appearance:none;-webkit-appearance:none;background-image:none;cursor:pointer;}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-500);}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;background:#fff;
  border-color:var(--jade-700);
  box-shadow:0 0 0 3px rgba(14,90,85,.18);
}
.field.has-error input,.field.has-error select,.field.has-error textarea{border-color:var(--clay-500);}
.field__error{display:none;font-size:14px;color:var(--clay-500);margin-top:6px;}
.field.has-error .field__error{display:block;}
.check{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--ink-700);line-height:1.7;margin-bottom:20px;}
.check input{width:18px;height:18px;flex:none;margin-top:3px;accent-color:var(--jade-700);}
.form-note{font-size:13px;color:var(--ink-500);margin-top:14px;line-height:1.7;}
.form-success{
  display:none;align-items:center;gap:10px;
  margin-bottom:18px;padding:12px 16px;border-radius:var(--r-sm);
  background:var(--jade-100);color:var(--jade-900);font-size:14px;font-weight:600;
}
.form-success.is-visible{display:flex;}
.spinner{animation:spin 900ms linear infinite;}
@keyframes spin{to{transform:rotate(360deg);}}

/* ============ 页脚 ============ */
.site-footer{position:relative;background:var(--ink-bg);color:rgba(255,255,255,.7);padding:72px 0 0;overflow:hidden;}
.footer__wave{position:absolute;left:0;right:0;top:0;width:100%;height:180px;opacity:.06;pointer-events:none;}
.footer__grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;
  padding-bottom:48px;
}
.footer__brand{color:#fff;margin-bottom:18px;}
.footer__brand .brand__mark{background:rgba(255,255,255,.1);color:var(--sand-500);}
.footer__brand .brand__text{color:#fff;}
.footer__desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);max-width:280px;}
.footer__social{display:flex;gap:12px;margin-top:20px;}
.footer__social a{
  width:40px;height:40px;border-radius:10px;
  display:grid;place-items:center;
  background:rgba(255,255,255,.07);color:rgba(255,255,255,.8);
  transition:background var(--ease),color var(--ease),transform var(--ease);
}
.footer__social a:hover{background:var(--jade-700);color:#fff;transform:translateY(-2px);}
.footer__title{font-size:15px;font-weight:600;color:#fff;margin-bottom:18px;}
.footer__links{display:flex;flex-direction:column;gap:12px;}
.footer__links a{font-size:14px;color:rgba(255,255,255,.68);}
.footer__links a:hover{color:#fff;}
.footer__note{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);}
.footer__note strong{color:rgba(255,255,255,.9);display:block;margin-bottom:6px;font-weight:600;}
.footer__bottom{
  position:relative;z-index:2;
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  font-size:13px;color:rgba(255,255,255,.5);
}
.footer__bottom a{color:rgba(255,255,255,.6);}
.footer__bottom a:hover{color:#fff;}

.backtop{
  position:fixed;right:24px;bottom:24px;z-index:70;
  width:44px;height:44px;border-radius:12px;
  display:grid;place-items:center;border:0;cursor:pointer;
  background:var(--jade-700);color:#fff;
  box-shadow:0 10px 24px rgba(14,90,85,.3);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity var(--ease),transform var(--ease),visibility var(--ease),background var(--ease);
}
.backtop.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.backtop:hover{background:var(--jade-900);}

/* ============ 响应式 ============ */
@media (min-width:1440px){
  .container{max-width:1280px;}
}
@media (max-width:1200px){
  .doc-layout{grid-template-columns:200px minmax(0,1fr);gap:40px;}
  .footer__grid{grid-template-columns:1.2fr 1fr 1fr;gap:32px;}
}
@media (max-width:992px){
  body{font-size:16px;}
  .nav__cta{display:none;}
  .nav__toggle{display:inline-flex;}
  .nav__list{
    position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);
    display:flex;flex-direction:column;align-items:stretch;gap:0;
    background:var(--paper-2);
    padding:88px 24px 32px;
    margin:0;
    box-shadow:-16px 0 40px rgba(23,26,25,.16);
    transform:translateX(100%);
    transition:transform 260ms cubic-bezier(.2,.7,.3,1);
    overflow-y:auto;z-index:80;
  }
  .nav__list.is-open{transform:translateX(0);}
  .nav__list a{font-size:18px;line-height:56px;padding:0;border-bottom:1px solid var(--line);border-radius:0;display:block;}
  .nav__list a::after{display:none;}
  .nav__list a[aria-current="page"]{border-bottom-color:var(--jade-500);}
  .nav__cta-mobile{display:block;margin-top:24px;}
  .nav__cta-mobile .btn{width:100%;height:48px;}
  .nav-overlay{
    position:fixed;inset:0;background:rgba(16,32,29,.45);
    opacity:0;visibility:hidden;transition:opacity var(--ease),visibility var(--ease);z-index:75;
  }
  .nav-overlay.is-open{opacity:1;visibility:visible;}
  .section{padding:64px 0;}
  .section--tight{padding:56px 0;}
  .doc-layout{grid-template-columns:minmax(0,1fr);gap:32px;}
  .doc-aside{position:static;}
  .doc-aside ul{border-left:0;display:flex;flex-wrap:wrap;gap:10px;}
  .doc-aside a{padding:8px 14px;border:1px solid var(--line);border-radius:8px;margin-left:0;font-size:14px;}
  .doc-aside a:hover,.doc-aside a.is-active{background:var(--jade-100);border-color:var(--jade-500);background-image:none;}
  .doc-aside__card{margin-top:20px;}
  .cat-hero{padding:64px 0 72px;}
  .metrics__grid{grid-template-columns:1fr 1fr;gap:28px 0;}
  .metric{padding:0 20px;}
  .metric:nth-child(3){border-left:0;padding-left:0;}
  .compare__grid{grid-template-columns:1fr;}
  .figure-block{grid-template-columns:1fr;}
  .figure-block__media{min-height:220px;}
  .cta__grid{grid-template-columns:1fr;gap:36px;}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:768px){
  .container{padding:0 20px;}
  .crumbs__inner{padding:12px 20px;}
  .doc-block{padding:24px;}
  .doc-block h3{font-size:19px;}
  .footer__grid{grid-template-columns:1fr;gap:32px;}
  .footer__bottom{flex-direction:column;align-items:flex-start;}
  .metrics__grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:480px){
  .topbar__inner{justify-content:center;}
  .topbar__links{display:none;}
  .metrics__grid{grid-template-columns:1fr;gap:24px;}
  .metric{padding:0;border-left:0;border-top:1px solid rgba(255,255,255,.12);padding-top:20px;}
  .metric:first-child{border-top:0;padding-top:0;}
  .doc-block{padding:20px;}
  .form-card{padding:22px;}
  .cat-hero__actions .btn{width:100%;}
  .field input,.field select,.field textarea{height:52px;}
  .field textarea{height:auto;min-height:120px;}
  .backtop{right:16px;bottom:16px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category2 */
:root{
  --jade-700:#0E5A55;
  --jade-900:#0A3F3C;
  --jade-500:#2E8579;
  --jade-100:#E3EDEA;
  --sand-500:#C8A254;
  --clay-500:#D2603A;
  --paper:#F6F4EE;
  --paper-2:#FFFFFF;
  --paper-3:#EDF1EC;
  --ink-bg:#10201D;
  --ink-900:#171A19;
  --ink-700:#3A403E;
  --ink-500:#6E7673;
  --line:#E2E0D8;
  --r-s:8px;
  --r-m:14px;
  --r-l:20px;
  --shadow-1:0 1px 2px rgba(23,26,25,.04);
  --shadow-2:0 12px 32px rgba(14,90,85,.14);
  --t:220ms cubic-bezier(.2,.7,.3,1);
  --font:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  font-size:17px;
  line-height:1.88;
  letter-spacing:.01em;
  color:var(--ink-700);
  background:var(--paper);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block;height:auto}
a{color:var(--jade-700);text-decoration:none;transition:color var(--t),background-color var(--t),border-color var(--t),box-shadow var(--t),transform var(--t)}
a:hover{color:var(--jade-900)}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--jade-700);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1440px){.container{max-width:1280px}}
@media (max-width:767px){.container{padding:0 20px}}

/* ---------- 顶部信息条 ---------- */
.site-header{position:sticky;top:0;z-index:90;background:var(--paper-2)}
.topbar{background:var(--ink-bg);color:rgba(255,255,255,.78);font-size:13px;letter-spacing:.02em}
.topbar__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:36px}
.topbar__note{margin:0}
.topbar__links{display:flex;align-items:center;gap:20px}
.topbar__links a{color:rgba(255,255,255,.82)}
.topbar__links a:hover{color:#fff}
.site-header.is-scrolled .topbar{display:none}

/* ---------- 主导航 ---------- */
.nav{background:var(--paper-2);border-bottom:1px solid var(--line)}
.site-header.is-scrolled .nav{box-shadow:0 6px 20px rgba(23,26,25,.08)}
.nav__inner{display:flex;align-items:center;gap:28px;height:68px;transition:height var(--t)}
.site-header.is-scrolled .nav__inner{height:56px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink-900)}
.brand__mark{
  width:34px;height:34px;flex:0 0 34px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:10px;background:var(--jade-100);color:var(--jade-700);
}
.brand__text{font-size:18px;font-weight:700;letter-spacing:.02em}
.nav__list{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav__list>li>a{
  position:relative;display:inline-block;
  padding:10px 12px;font-size:15px;font-weight:500;color:var(--ink-700);border-radius:var(--r-s);
}
.nav__list>li>a::after{
  content:"";position:absolute;left:50%;bottom:4px;width:0;height:2px;
  background:var(--jade-700);transform:translateX(-50%);
  transition:width var(--t);
}
.nav__list>li>a:hover,.nav__list>li>a:focus-visible{color:var(--jade-700);background:var(--jade-100)}
.nav__list>li>a:hover::after,.nav__list>li>a:focus-visible::after{width:60%}
.nav__list>li>a[aria-current="page"]{color:var(--jade-700);font-weight:600}
.nav__list>li>a[aria-current="page"]::after{width:60%}
.nav__cta-mobile{display:none}
.nav__toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  border-radius:var(--r-s);color:var(--ink-900);border:1px solid var(--line);
}
.nav__toggle:hover{background:var(--jade-100);color:var(--jade-700)}
.nav-overlay{
  position:fixed;inset:0;background:rgba(16,32,29,.48);
  opacity:0;visibility:hidden;transition:opacity var(--t),visibility var(--t);z-index:95;
}
.nav-overlay.is-open{opacity:1;visibility:visible}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:10px;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;transition:all var(--t);
}
.btn--primary{background:var(--jade-700);color:#fff;box-shadow:0 6px 16px rgba(14,90,85,.22)}
.btn--primary:hover{background:var(--jade-900);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(14,90,85,.26)}
.btn--primary:active{transform:translateY(0);box-shadow:0 4px 10px rgba(14,90,85,.2)}
.btn--ghost{background:var(--paper-2);color:var(--jade-700);border-color:var(--line)}
.btn--ghost:hover{border-color:var(--jade-700);color:var(--jade-900);background:var(--jade-100)}
.btn[disabled]{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--jade-700)}
.link-arrow svg{transition:transform var(--t)}
.link-arrow:hover svg{transform:translateX(4px)}

/* ---------- 面包屑 ---------- */
.breadcrumb{background:var(--paper-2);border-bottom:1px solid var(--line);font-size:13px;letter-spacing:.02em}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:14px 0;color:var(--ink-500)}
.breadcrumb li::after{content:"/";margin-left:8px;color:var(--line)}
.breadcrumb li:last-child::after{content:""}
.breadcrumb a{color:var(--ink-500)}
.breadcrumb a:hover{color:var(--jade-700)}
.breadcrumb [aria-current="page"]{color:var(--ink-900);font-weight:600}

/* ---------- Hero ---------- */
.hero{background:var(--paper-2);padding:72px 0 80px;border-bottom:1px solid var(--line)}
.hero__grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center}
.hero__eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;background:var(--jade-100);
  color:var(--jade-700);font-size:13px;font-weight:600;letter-spacing:.02em;
}
.hero__title{
  margin-top:22px;
  font-size:clamp(34px,4.4vw,52px);font-weight:700;line-height:1.22;letter-spacing:-.01em;color:var(--ink-900);
}
.hero__sub{margin-top:18px;font-size:17px;line-height:1.8;color:var(--ink-700);max-width:640px}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero__tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 12px;border-radius:var(--r-s);border:1px solid var(--line);
  background:var(--paper);font-size:13px;color:var(--ink-700);
}
.tag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--sand-500)}
.hero__media{position:relative;border-radius:var(--r-l);overflow:hidden;aspect-ratio:16/11;box-shadow:var(--shadow-1)}
.hero__media img{width:100%;height:100%;object-fit:cover}
.hero__media::after{content:"";position:absolute;inset:0;background:rgba(14,90,85,.08)}
.hero__badge{
  position:absolute;left:18px;bottom:18px;z-index:2;
  display:flex;align-items:center;gap:10px;
  padding:12px 16px;border-radius:var(--r-m);
  background:rgba(255,255,255,.94);box-shadow:var(--shadow-1);
  font-size:13px;color:var(--ink-700);
}
.hero__badge strong{color:var(--jade-700);font-size:15px}

/* ---------- 通用区块 ---------- */
.section{padding:96px 0}
.section--alt{background:var(--paper-3)}
.section--white{background:var(--paper-2)}
.section__head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:44px}
.section__head--stack{display:block;max-width:760px}
.section__kicker{
  display:flex;align-items:center;gap:10px;
  font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--sand-500);text-transform:uppercase;
}
.section__kicker::before{content:"";width:3px;height:18px;background:var(--jade-700);border-radius:2px}
.section__title{
  margin-top:14px;font-size:clamp(26px,2.8vw,34px);line-height:1.3;font-weight:700;color:var(--ink-900);letter-spacing:-.005em;
}
.section__desc{margin-top:16px;max-width:720px;color:var(--ink-700)}
@media (max-width:767px){
  .section{padding:56px 0}
  .hero{padding:48px 0 56px}
  .section__head{flex-direction:column;align-items:flex-start;gap:18px;margin-bottom:32px}
}

/* ---------- Bento 能力矩阵 ---------- */
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.bento__item{
  display:flex;flex-direction:column;gap:14px;
  padding:30px;border-radius:var(--r-m);background:var(--paper-2);
  border:1px solid var(--line);box-shadow:var(--shadow-1);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.bento__item:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:rgba(14,90,85,.28)}
.bento__item--4{grid-column:span 4}
.bento__item--8{grid-column:span 8}
.bento__item--soft{background:var(--jade-100);border-color:rgba(14,90,85,.14)}
.bento__icon{
  width:44px;height:44px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
  background:var(--jade-100);color:var(--jade-700);
}
.bento__item--soft .bento__icon{background:rgba(255,255,255,.72)}
.bento__title{font-size:21px;line-height:1.45;font-weight:600;color:var(--ink-900)}
.bento__text{font-size:16px;line-height:1.82;color:var(--ink-700)}
.bento__body{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center;flex:1}
.bento__media{border-radius:var(--r-m);overflow:hidden;aspect-ratio:16/10;background:var(--jade-100)}
.bento__media img{width:100%;height:100%;object-fit:cover}
.bento__list{display:flex;flex-direction:column;gap:10px;margin-top:2px}
.bento__list li{position:relative;padding-left:16px;font-size:15px;line-height:1.75;color:var(--ink-700)}
.bento__list li::before{content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:50%;background:var(--jade-500)}
@media (max-width:991px){
  .bento{grid-template-columns:1fr}
  .bento__item--4,.bento__item--8{grid-column:span 1}
  .bento__body{grid-template-columns:1fr}
}
@media (max-width:520px){
  .bento__item{padding:20px}
}

/* ---------- 对比条 ---------- */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.compare__col{padding:32px;border-radius:var(--r-m);border:1px solid var(--line);background:var(--paper-2)}
.compare__col--good{background:var(--paper-2);border-color:rgba(14,90,85,.3);box-shadow:0 12px 32px rgba(14,90,85,.1)}
.compare__label{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
  letter-spacing:.04em;color:var(--ink-500);
}
.compare__col--good .compare__label{color:var(--jade-700)}
.compare__title{margin-top:12px;font-size:20px;font-weight:600;color:var(--ink-900);line-height:1.5}
.compare__list{display:flex;flex-direction:column;gap:20px;margin-top:26px}
.compare__row{display:flex;flex-direction:column;gap:8px}
.compare__row span{font-size:15px;line-height:1.7;color:var(--ink-700)}
.compare__col--good .compare__row{padding-left:14px;border-left:3px solid var(--jade-700);background:var(--jade-100);border-radius:0 var(--r-s) var(--r-s) 0;padding-top:6px;padding-bottom:6px}
.meter{height:6px;border-radius:999px;background:var(--line);overflow:hidden}
.meter i{display:block;height:100%;border-radius:999px;background:var(--line)}
.compare__col--good .meter i{background:var(--jade-700)}
.compare__note{margin-top:32px;display:flex;flex-wrap:wrap;align-items:center;gap:16px;font-size:15px;color:var(--ink-700)}
@media (max-width:880px){.compare{grid-template-columns:1fr}}

/* ---------- 场景卡片 ---------- */
.scenes{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.scene{display:flex;flex-direction:column;border-radius:var(--r-m);overflow:hidden;background:var(--paper-2);border:1px solid var(--line);box-shadow:var(--shadow-1);transition:transform var(--t),box-shadow var(--t)}
.scene:hover{transform:translateY(-3px);box-shadow:var(--shadow-2)}
.scene__media{aspect-ratio:16/9;background:var(--jade-100);overflow:hidden}
.scene__media img{width:100%;height:100%;object-fit:cover}
.scene__body{padding:24px;display:flex;flex-direction:column;gap:10px;flex:1}
.scene__title{font-size:19px;font-weight:600;color:var(--ink-900);line-height:1.5}
.scene__text{font-size:15px;line-height:1.78;color:var(--ink-700);flex:1}
.scene__meta{font-size:13px;color:var(--ink-500);letter-spacing:.02em}
@media (max-width:991px){.scenes{grid-template-columns:1fr}}

/* ---------- 步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
.step{position:relative;padding:28px 24px;border-radius:var(--r-m);background:var(--paper-2);border:1px solid var(--line);box-shadow:var(--shadow-1)}
.step::before{
  counter-increment:step;content:"0" counter(step);
  display:block;font-size:13px;font-weight:700;letter-spacing:.1em;color:var(--sand-500);
}
.step__title{margin-top:12px;font-size:19px;font-weight:600;color:var(--ink-900);line-height:1.5}
.step__text{margin-top:10px;font-size:15px;line-height:1.78;color:var(--ink-700)}
.step::after{
  content:"";position:absolute;left:24px;right:24px;bottom:0;height:3px;
  background:linear-gradient(90deg,var(--jade-700),rgba(14,90,85,0));border-radius:3px 3px 0 0;
}
@media (max-width:991px){.steps{grid-template-columns:1fr 1fr}}
@media (max-width:600px){.steps{grid-template-columns:1fr}}

/* ---------- FAQ ---------- */
.faq{max-width:820px;margin:0 auto;background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-m);overflow:hidden}
.faq__item{border-bottom:1px solid var(--line);transition:box-shadow var(--t)}
.faq__item:last-child{border-bottom:0}
.faq__item[open]{box-shadow:inset 3px 0 0 var(--jade-700);background:#FCFCFA}
.faq__item summary{
  position:relative;display:block;padding:20px 56px 20px 24px;
  font-size:17px;font-weight:600;color:var(--ink-900);cursor:pointer;list-style:none;
}
.faq__item summary::-webkit-details-marker{display:none}
.faq__item summary:hover{color:var(--jade-700)}
.faq__icon{position:absolute;right:22px;top:50%;width:16px;height:16px;transform:translateY(-50%)}
.faq__icon::before,.faq__icon::after{
  content:"";position:absolute;left:0;top:7px;width:16px;height:1.6px;border-radius:2px;
  background:var(--jade-700);transition:transform var(--t),opacity var(--t);
}
.faq__icon::after{transform:rotate(90deg)}
.faq__item[open] .faq__icon::after{transform:rotate(0);opacity:0}
.faq__a{padding:0 56px 24px 24px;font-size:16px;line-height:1.9;color:var(--ink-700)}

/* ---------- CTA / 表单 ---------- */
.cta{background:var(--jade-100);border-top:1px solid rgba(14,90,85,.12);border-bottom:1px solid rgba(14,90,85,.12)}
.cta__grid{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:start}
.cta__title{font-size:clamp(26px,2.8vw,34px);line-height:1.3;font-weight:700;color:var(--ink-900)}
.cta__text{margin-top:16px;font-size:17px;line-height:1.85;color:var(--ink-700);max-width:520px}
.cta__list{display:flex;flex-direction:column;gap:16px;margin-top:30px}
.cta__list li{display:flex;align-items:flex-start;gap:12px;font-size:15px;color:var(--ink-700)}
.cta__list svg{flex:0 0 20px;margin-top:4px;color:var(--jade-700)}
.form-card{background:var(--paper-2);border-radius:var(--r-m);border:1px solid var(--line);box-shadow:var(--shadow-1);padding:32px}
.form__grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:8px}
.field--full{grid-column:1 / -1}
.field label{font-size:14px;font-weight:600;color:var(--ink-900)}
.field .req{color:var(--clay-500);margin-left:2px}
.field input,.field select,.field textarea{
  width:100%;min-height:48px;padding:12px 14px;
  border:1px solid var(--line);border-radius:var(--r-s);background:#FDFDFC;
  font-size:15px;color:var(--ink-900);transition:border-color var(--t),box-shadow var(--t),background-color var(--t);
}
.field textarea{min-height:112px;resize:vertical;line-height:1.75}
.field input:hover,.field select:hover,.field textarea:hover{border-color:rgba(14,90,85,.4)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--jade-700);background:#fff;box-shadow:0 0 0 4px rgba(14,90,85,.16);
}
.field.is-error input,.field.is-error select,.field.is-error textarea{border-color:var(--clay-500);background:#FEF6F3}
.field__error{display:none;font-size:14px;color:var(--clay-500)}
.field.is-error .field__error{display:block}
.check{display:flex;align-items:flex-start;gap:10px;font-size:14px;line-height:1.7;color:var(--ink-700)}
.check input{width:18px;height:18px;min-height:0;margin-top:4px;accent-color:var(--jade-700)}
.form__actions{margin-top:22px;display:flex;flex-direction:column;gap:14px}
.form__actions .btn{width:100%;min-height:50px}
.form__status{
  display:none;align-items:flex-start;gap:10px;
  padding:14px 16px;border-radius:var(--r-s);
  background:var(--jade-100);color:var(--jade-900);font-size:14px;line-height:1.7;
}
.form__status.is-visible{display:flex}
.form__status.is-error{background:#FBEDE9;color:#8C3A20}
@media (max-width:991px){
  .cta__grid{grid-template-columns:1fr;gap:36px}
  .form__grid{grid-template-columns:1fr}
  .form-card{padding:24px}
}
@media (max-width:520px){
  .form-card{padding:20px}
  .field input,.field select,.field textarea{min-height:52px}
}

/* ---------- 页脚 ---------- */
.site-footer{position:relative;overflow:hidden;background:var(--ink-bg);color:rgba(255,255,255,.72);font-size:15px;padding:72px 0 0;margin-top:0}
.footer__wave{position:absolute;inset:auto 0 0 0;width:100%;height:180px;opacity:.06;pointer-events:none}
.footer__grid{position:relative;display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.footer__brand{color:#fff}
.footer__brand .brand__mark{background:rgba(255,255,255,.1);color:#fff}
.footer__brand .brand__text{color:#fff}
.footer__desc{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);max-width:300px}
.footer__social{display:flex;gap:12px;margin-top:20px}
.footer__social a{
  width:38px;height:38px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.08);color:#fff;
}
.footer__social a:hover{background:var(--jade-500);color:#fff;transform:translateY(-2px)}
.footer__title{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px}
.footer__links{display:flex;flex-direction:column;gap:12px}
.footer__links a{font-size:14px;color:rgba(255,255,255,.72)}
.footer__links a:hover{color:#fff}
.footer__note{font-size:14px;line-height:1.85;color:rgba(255,255,255,.66)}
.footer__bottom{
  position:relative;border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.6);letter-spacing:.02em;
}
@media (max-width:991px){.footer__grid{grid-template-columns:1fr 1fr;gap:32px}}
@media (max-width:560px){.footer__grid{grid-template-columns:1fr;padding-bottom:36px}}

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--jade-700);color:#fff;box-shadow:0 10px 24px rgba(14,90,85,.28);
  opacity:0;visibility:hidden;transform:translateY(10px);transition:all var(--t);z-index:80;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--jade-900);color:#fff}

/* ---------- 移动端导航 ---------- */
@media (max-width:991px){
  .nav__toggle{display:inline-flex}
  .nav__cta{display:none}
  .nav__list{
    position:fixed;top:0;right:0;height:100vh;width:min(330px,86vw);
    margin:0;padding:88px 22px 24px;
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--paper-2);box-shadow:-18px 0 42px rgba(23,26,25,.18);
    transform:translateX(102%);transition:transform 260ms cubic-bezier(.2,.7,.3,1);
    z-index:96;overflow-y:auto;
  }
  .nav__list.is-open{transform:translateX(0)}
  .nav__list>li>a{
    display:block;padding:0 4px;height:56px;line-height:56px;
    font-size:18px;font-weight:500;border-bottom:1px solid var(--line);border-radius:0;
  }
  .nav__list>li>a::after{display:none}
  .nav__list>li>a[aria-current="page"]{padding-left:14px;border-left:3px solid var(--jade-700)}
  .nav__cta-mobile{display:block;margin-top:24px}
  .nav__cta-mobile .btn{width:100%;min-height:50px}
}
@media (max-width:520px){
  .hero__title{font-size:30px}
  .topbar__note{font-size:12px}
  .topbar__links{font-size:12px;gap:12px}
}

/* roulang page: category3 */
:root{
  --jade-700:#0E5A55;
  --jade-900:#0A3F3C;
  --jade-500:#2E8579;
  --jade-100:#E3EDEA;
  --sand-500:#C8A254;
  --clay-500:#D2603A;
  --paper:#F6F4EE;
  --paper-2:#FFFFFF;
  --paper-3:#EDF1EC;
  --ink-bg:#10201D;
  --ink-900:#171A19;
  --ink-700:#3A403E;
  --ink-500:#6E7673;
  --line:#E2E0D8;
  --radius-s:8px;
  --radius-m:14px;
  --radius-l:20px;
  --shadow-1:0 1px 2px rgba(23,26,25,.04);
  --shadow-2:0 12px 32px rgba(14,90,85,.14);
  --shadow-3:0 6px 20px rgba(23,26,25,.08);
  --ease:cubic-bezier(.2,.7,.3,1);
  --gap:24px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  font-size:17px;
  line-height:1.88;
  letter-spacing:.01em;
  color:var(--ink-700);
  background:var(--paper);
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
p{margin:0 0 1.1em;}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700;letter-spacing:-.01em;}
:focus-visible{outline:2px solid var(--jade-700);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section--tight{padding:64px 0;}
.section--alt{background:var(--paper-3);}
.section__head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap;}
.section__title{position:relative;padding-left:16px;font-size:clamp(26px,2.8vw,34px);line-height:1.3;}
.section__title::before{content:"";position:absolute;left:0;top:.28em;width:3px;height:18px;background:var(--jade-700);border-radius:2px;}
.section__desc{max-width:640px;margin-top:12px;font-size:16px;color:var(--ink-500);line-height:1.8;}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:500;color:var(--jade-700);border-bottom:1px solid transparent;transition:border-color .22s var(--ease),color .22s var(--ease);}
.text-link:hover{border-color:var(--jade-700);}
.text-link svg{transition:transform .22s var(--ease);}
.text-link:hover svg{transform:translateX(3px);}

/* 顶部信息条 */
.topbar{height:36px;background:var(--ink-bg);color:rgba(255,255,255,.82);font-size:13px;line-height:36px;letter-spacing:.02em;}
.topbar__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;}
.topbar__note{margin:0;}
.topbar__links{display:flex;gap:20px;}
.topbar__links a{transition:color .22s var(--ease);}
.topbar__links a:hover{color:#fff;}

/* 导航 */
.site-header{position:sticky;top:0;z-index:60;background:var(--paper-2);}
.nav{background:var(--paper-2);border-bottom:1px solid var(--line);transition:box-shadow .24s var(--ease),height .24s var(--ease);}
.nav__inner{display:flex;align-items:center;gap:32px;height:68px;transition:height .24s var(--ease);}
.site-header.is-stuck .nav{box-shadow:var(--shadow-3);}
.site-header.is-stuck .nav__inner{height:56px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand__mark{width:34px;height:34px;border-radius:10px;background:var(--jade-100);color:var(--jade-700);display:grid;place-items:center;flex-shrink:0;}
.brand__text{font-size:18px;font-weight:700;letter-spacing:.02em;color:var(--ink-900);white-space:nowrap;}
.nav__list{display:flex;align-items:center;gap:28px;margin-left:auto;}
.nav__list>li>a{position:relative;display:inline-block;padding:6px 0;font-size:15px;font-weight:500;color:var(--ink-700);transition:color .22s var(--ease);}
.nav__list>li>a::after{content:"";position:absolute;left:50%;right:50%;bottom:-2px;height:2px;background:var(--jade-700);transition:left .18s var(--ease),right .18s var(--ease);}
.nav__list>li>a:hover{color:var(--jade-700);}
.nav__list>li>a:hover::after{left:0;right:0;}
.nav__list>li>a[aria-current="page"]{color:var(--jade-700);font-weight:600;}
.nav__list>li>a[aria-current="page"]::after{left:0;right:0;}
.nav__cta-mobile{display:none;}
.nav__toggle{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:10px;background:var(--paper-2);color:var(--ink-700);cursor:pointer;align-items:center;justify-content:center;transition:border-color .22s var(--ease),color .22s var(--ease);}
.nav__toggle:hover{border-color:var(--jade-700);color:var(--jade-700);}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:10px;font-size:15px;font-weight:600;letter-spacing:.02em;border:1px solid transparent;cursor:pointer;transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);}
.btn--primary{background:var(--jade-700);color:#fff;box-shadow:0 1px 2px rgba(14,90,85,.2);}
.btn--primary:hover{background:var(--jade-900);box-shadow:0 10px 24px rgba(14,90,85,.24);transform:translateY(-2px);}
.btn--primary:active{transform:translateY(0);box-shadow:0 2px 6px rgba(14,90,85,.24);}
.btn--ghost{background:var(--paper-2);color:var(--jade-700);border-color:var(--line);}
.btn--ghost:hover{border-color:var(--jade-700);background:var(--jade-100);transform:translateY(-2px);}
.btn--block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none;}
.btn--sm{height:42px;padding:0 18px;font-size:14px;}

/* 面包屑 */
.breadcrumb{background:var(--paper-3);border-bottom:1px solid var(--line);}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-500);padding:14px 0;letter-spacing:.02em;}
.breadcrumb__list a{color:var(--ink-500);transition:color .22s var(--ease);}
.breadcrumb__list a:hover{color:var(--jade-700);}
.breadcrumb__list li[aria-current="page"]{color:var(--ink-900);font-weight:600;}
.breadcrumb__sep{color:var(--line);}

/* Hero */
.hero{position:relative;background:var(--ink-bg);overflow:hidden;}
.hero__bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.webp');background-size:cover;background-position:center;opacity:.34;}
.hero__veil{position:absolute;inset:0;background:linear-gradient(100deg,rgba(16,32,29,.94) 0%,rgba(16,32,29,.82) 48%,rgba(10,63,60,.62) 100%);}
.hero__inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;padding:88px 0 76px;}
.hero__eyebrow{display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;border-radius:999px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);color:#E8F1EE;font-size:13px;letter-spacing:.04em;}
.hero h1{color:#fff;font-size:clamp(34px,4.4vw,50px);line-height:1.22;margin:22px 0 18px;}
.hero__lead{color:rgba(255,255,255,.82);font-size:18px;line-height:1.85;max-width:560px;margin:0 0 30px;}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px;}
.hero__actions .btn--ghost{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.26);}
.hero__actions .btn--ghost:hover{background:rgba(255,255,255,.16);border-color:#fff;}
.hero__tags{display:flex;flex-wrap:wrap;gap:10px;}
.tag{display:inline-flex;align-items:center;gap:6px;height:32px;padding:0 14px;border-radius:8px;font-size:13px;letter-spacing:.02em;background:var(--jade-100);color:var(--jade-900);border:1px solid rgba(14,90,85,.14);}
.hero__tags .tag{background:rgba(255,255,255,.1);color:#DDEBE7;border-color:rgba(255,255,255,.16);}
.hero__media{position:relative;border-radius:var(--radius-l);overflow:hidden;aspect-ratio:16/12;box-shadow:0 24px 60px rgba(0,0,0,.32);}
.hero__media img{width:100%;height:100%;object-fit:cover;}
.hero__media::after{content:"";position:absolute;inset:0;background:rgba(14,90,85,.12);}

/* 时间线 */
.layout-aside{display:grid;grid-template-columns:1fr 300px;gap:56px;align-items:start;}
.timeline{position:relative;padding-left:0;}
.timeline::before{content:"";position:absolute;left:5px;top:10px;bottom:26px;width:2px;background:rgba(14,90,85,.3);border-radius:2px;}
.tl-item{position:relative;padding-left:48px;padding-bottom:42px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item__dot{position:absolute;left:0;top:8px;width:12px;height:12px;border-radius:50%;background:var(--jade-700);box-shadow:0 0 0 4px var(--jade-100);}
.tl-item__card{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-m);padding:26px 28px;box-shadow:var(--shadow-1);transition:box-shadow .22s var(--ease),transform .22s var(--ease),border-color .22s var(--ease);}
.tl-item__card:hover{box-shadow:var(--shadow-2);transform:translateY(-3px);border-color:rgba(14,90,85,.24);}
.tl-item__index{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--sand-500);margin-bottom:8px;}
.tl-item__card h3{font-size:20px;line-height:1.45;margin-bottom:10px;}
.tl-item__card p{font-size:16px;color:var(--ink-700);margin:0 0 14px;}
.tl-item__meta{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:14px;}
.chip{display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:6px;font-size:12.5px;letter-spacing:.02em;border:1px solid rgba(14,90,85,.22);color:var(--jade-700);background:var(--paper-2);}

/* 侧栏粘性 */
.sticky-card{position:sticky;top:100px;background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-m);padding:26px;box-shadow:var(--shadow-1);}
.sticky-card h3{font-size:17px;margin-bottom:14px;}
.anchor-list li+li{margin-top:2px;}
.anchor-list a{display:block;padding:10px 12px;border-radius:8px;font-size:15px;color:var(--ink-700);transition:background .22s var(--ease),color .22s var(--ease);}
.anchor-list a:hover{background:var(--jade-100);color:var(--jade-900);}
.sticky-note{margin-top:18px;padding-top:18px;border-top:1px solid var(--line);font-size:14px;color:var(--ink-500);line-height:1.8;}
.sticky-note strong{color:var(--ink-900);font-size:22px;font-variant-numeric:tabular-nums;}

/* 帮助主题卡片 */
.topic-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;}
.topic-card{grid-column:span 4;background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-m);overflow:hidden;box-shadow:var(--shadow-1);display:flex;flex-direction:column;transition:box-shadow .22s var(--ease),transform .22s var(--ease),border-color .22s var(--ease);}
.topic-card:hover{box-shadow:var(--shadow-2);transform:translateY(-3px);border-color:rgba(14,90,85,.24);}
.topic-card:hover h3{color:var(--jade-700);}
.topic-card__media{aspect-ratio:16/9;background:var(--jade-100);overflow:hidden;}
.topic-card__media img{width:100%;height:100%;object-fit:cover;}
.topic-card__body{padding:24px;display:flex;flex-direction:column;flex:1;}
.topic-card__body h3{font-size:19px;line-height:1.45;margin-bottom:10px;transition:color .22s var(--ease);}
.topic-card__body p{font-size:15px;line-height:1.78;color:var(--ink-700);margin:0 0 16px;}
.topic-card__body .text-link{margin-top:auto;font-size:14px;}
.topic-card--wide{grid-column:span 8;flex-direction:row;align-items:stretch;}
.topic-card--wide .topic-card__media{aspect-ratio:auto;width:44%;flex-shrink:0;}
.topic-card--wide .topic-card__body{padding:28px 30px;}
.icon-badge{width:40px;height:40px;border-radius:10px;background:var(--jade-100);color:var(--jade-700);display:grid;place-items:center;margin-bottom:16px;}

/* 速查清单 */
.check-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;}
.check-card{grid-column:span 6;background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-m);padding:28px;box-shadow:var(--shadow-1);}
.check-card__head{display:flex;align-items:center;gap:12px;margin-bottom:18px;}
.check-card__head h3{font-size:18px;}
.check-list li{position:relative;padding-left:22px;font-size:15.5px;line-height:1.8;color:var(--ink-700);}
.check-list li+li{margin-top:12px;}
.check-list li::before{content:"";position:absolute;left:0;top:.62em;width:6px;height:6px;border-radius:50%;background:var(--jade-700);}
.check-list li b{color:var(--ink-900);font-weight:600;}

/* 指标带 */
.metrics{background:var(--ink-bg);color:#fff;position:relative;overflow:hidden;}
.metrics__grid{display:grid;grid-template-columns:repeat(4,1fr);}
.metric{padding:44px 28px;border-left:1px solid rgba(255,255,255,.12);}
.metric:first-child{border-left:0;}
.metric__value{font-size:clamp(40px,5vw,58px);font-weight:700;line-height:1.05;color:#fff;letter-spacing:-.02em;display:flex;align-items:baseline;gap:6px;}
.metric__value span{font-size:16px;font-weight:500;color:rgba(255,255,255,.68);letter-spacing:0;}
.metric__label{margin-top:14px;font-size:15px;color:rgba(255,255,255,.9);}
.metric__note{margin-top:8px;font-size:13.5px;color:rgba(255,255,255,.58);line-height:1.7;}
.metrics__foot{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;padding:22px 0 40px;border-top:1px solid rgba(255,255,255,.12);font-size:14px;color:rgba(255,255,255,.72);margin-top:8px;}
.metrics__foot a{color:#9ED6C9;border-bottom:1px solid rgba(158,214,201,.4);}
.metrics__foot a:hover{color:#fff;border-color:#fff;}

/* FAQ */
.faq{max-width:840px;margin:0 auto;}
.faq details{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-m);margin-bottom:12px;overflow:hidden;transition:border-color .22s var(--ease),box-shadow .22s var(--ease);}
.faq details[open]{border-color:rgba(14,90,85,.3);box-shadow:var(--shadow-1);}
.faq summary{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:60px;padding:16px 24px;font-size:17px;font-weight:600;color:var(--ink-900);cursor:pointer;list-style:none;position:relative;}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::before{content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;background:var(--jade-700);opacity:0;transition:opacity .2s var(--ease);border-radius:0 2px 2px 0;}
.faq details[open] summary::before{opacity:1;}
.faq summary:hover{color:var(--jade-700);}
.faq__sign{flex-shrink:0;width:22px;height:22px;color:var(--jade-700);transition:transform .2s var(--ease);}
.faq details[open] .faq__sign{transform:rotate(45deg);}
.faq__answer{padding:0 24px 24px 24px;font-size:16px;line-height:1.9;color:var(--ink-700);}

/* 表单 */
.cta{background:var(--jade-100);}
.cta__grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start;}
.cta__list li{display:flex;gap:12px;align-items:flex-start;font-size:16px;color:var(--ink-700);}
.cta__list li+li{margin-top:16px;}
.cta__list svg{flex-shrink:0;margin-top:5px;color:var(--jade-700);}
.form-card{background:var(--paper-2);border-radius:var(--radius-m);padding:32px;box-shadow:0 16px 40px rgba(14,90,85,.1);border:1px solid rgba(14,90,85,.1);}
.field{margin-bottom:18px;}
.field label{display:block;font-size:14px;font-weight:600;color:var(--ink-900);margin-bottom:8px;}
.req{color:var(--Jade-700, #0E5A55);}
.field input,.field select,.field textarea{width:100%;height:48px;padding:0 14px;border:1px solid var(--line);border-radius:var(--radius-s);background:var(--paper-2);color:var(--ink-900);transition:border-color .22s var(--ease),box-shadow .22s var(--ease);}
.field textarea{height:120px;padding:12px 14px;line-height:1.7;resize:vertical;}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--jade-700);box-shadow:0 0 0 3px rgba(14,90,85,.18);}
.field.has-error input,.field.has-error select,.field.has-error textarea{border-color:var(--clay-500);}
.field__error{display:none;margin-top:6px;font-size:14px;color:var(--clay-500);}
.field.has-error .field__error{display:block;}
.checkbox{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--ink-500);line-height:1.7;}
.checkbox input{width:18px;height:18px;margin-top:4px;flex-shrink:0;accent-color:var(--jade-700);}
.form-success{display:none;align-items:center;gap:10px;margin-bottom:18px;padding:14px 16px;border-radius:var(--radius-s);background:var(--jade-100);color:var(--jade-900);font-size:15px;}
.form-success.is-visible{display:flex;}
.form-foot{margin-top:6px;font-size:13.5px;color:var(--ink-500);}

/* 页脚 */
.site-footer{position:relative;background:var(--ink-bg);color:rgba(255,255,255,.72);padding:72px 0 30px;overflow:hidden;}
.footer__wave{position:absolute;left:0;right:0;top:0;width:100%;height:180px;opacity:.06;}
.footer__grid{position:relative;display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;}
.footer__brand{gargin-bottom:16px;margin-bottom:16px;color:#fff;}
.footer__brand .brand__mark{background:rgba(255,255,255,.1);color:#9ED6C9;}
.footer__brand .brand__text{color:#fff;}
.footer__desc{font-size:14.5px;line-height:1.8;color:rgba(255,255,255,.6);max-width:300px;margin-top:14px;}
.footer__social{display:flex;gap:12px;margin-top:20px;}
.footer__social a{width:38px;height:38px;border-radius:10px;border:1px solid rgba(255,255,255,.16);display:grid;place-items:center;color:rgba(255,255,255,.72);transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);}
.footer__social a:hover{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.4);}
.footer__title{color:#fff;font-size:15px;font-weight:600;margin-bottom:18px;}
.footer__links{display:flex;flex-direction:column;gap:12px;font-size:14.5px;}
.footer__links a{color:rgba(255,255,255,.68);transition:color .22s var(--ease);}
.footer__links a:hover{color:#fff;}
.footer__meta{font-size:14.5px;line-height:1.85;color:rgba(255,255,255,.62);}
.footer__meta strong{display:block;color:#fff;font-size:15px;font-weight:600;margin-bottom:10px;}
.footer__bottom{position:relative;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;margin-top:56px;padding-top:24px;border-top:1px solid rgba(255,255,255,.12);font-size:13.5px;color:rgba(255,255,255,.5);}
.backtop{position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:12px;border:0;background:var(--jade-700);color:#fff;display:grid;place-items:center;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease),background .22s var(--ease);z-index:70;}
.backtop.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.backtop:hover{background:var(--jade-900);}

/* 响应式 */
@media (max-width:1199px){
  .layout-aside{grid-template-columns:1fr;gap:40px;}
  .sticky-card{position:static;}
  .topic-card{grid-column:span 6;}
  .topic-card--wide{grid-column:span 12;}
  .footer__grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
}
@media (max-width:991px){
  .section{padding:56px 0;}
  .section--tight{padding:48px 0;}
  .hero__inner{grid-template-columns:1fr;gap:36px;padding:56px 0 52px;}
  .hero__media{aspect-ratio:16/10;order:2;}
  .cta__grid{grid-template-columns:1fr;gap:36px;}
  .metrics__grid{grid-template-columns:repeat(2,1fr);}
  .metric{border-left:0;border-top:1px solid rgba(255,255,255,.12);padding:32px 20px;}
  .metric:nth-child(1),.metric:nth-child(2){border-top:0;}
  .nav__cta{display:none;}
  .nav__toggle{display:inline-flex;margin-left:auto;}
  .nav__list{position:fixed;top:0;right:0;width:min(340px,86vw);height:100vh;background:var(--paper-2);flex-direction:column;align-items:stretch;gap:0;margin:0;padding:88px 24px 32px;box-shadow:-16px 0 48px rgba(23,26,25,.18);transform:translateX(104%);transition:transform .26s var(--ease);overflow-y:auto;z-index:80;}
  .nav__list.is-open{transform:translateX(0);}
  .nav__list>li>a{display:block;font-size:18px;line-height:56px;padding:0;border-bottom:1px solid var(--line);}
  .nav__list>li>a::after{display:none;}
  .nav__list>li>a[aria-current="page"]{border-bottom-color:var(--jade-700);}
  .nav__cta-mobile{display:block;margin-top:24px;}
  .nav__cta-mobile .btn{width:100%;}
  body.is-locked{overflow:hidden;}
  .nav-mask{position:fixed;inset:0;background:rgba(16,32,29,.42);opacity:0;visibility:hidden;transition:opacity .26s var(--ease),visibility .26s var(--ease);z-index:70;}
  .nav-mask.is-visible{opacity:1;visibility:visible;}
}
@media (max-width:767px){
  body{font-size:16px;line-height:1.85;}
  .container{padding:0 20px;}
  .topbar__note{display:none;}
  .topbar__inner{justify-content:flex-start;}
  .topic-card,.topic-card--wide{grid-column:span 12;}
  .topic-card--wide{flex-direction:column;}
  .topic-card--wide .topic-card__media{width:100%;aspect-ratio:16/9;}
  .check-card{grid-column:span 12;padding:22px;}
  .footer__grid{grid-template-columns:1fr 1fr;}
  .form-card{padding:24px;}
  .tl-item{padding-left:38px;}
  .tl-item__card{padding:22px;}
}
@media (max-width:520px){
  .hero h1{font-size:30px;}
  .hero__lead{font-size:16px;}
  .hero__actions .btn{width:100%;}
  .metrics__grid{grid-template-columns:1fr;}
  .metric{border-top:1px solid rgba(255,255,255,.12);}
  .metric:nth-child(2){border-top:1px solid rgba(255,255,255,.12);}
  .footer__grid{grid-template-columns:1fr;}
  .backtop{right:16px;bottom:16px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
}