/* roulang page: index */
:root{
  --jade-900:#0F5B4E;
  --jade-700:#128468;
  --jade-600:#17A67C;
  --mint:#4FE0B0;
  --amber:#FF8A3D;
  --ink:#15201C;
  --ink-2:#5C6B65;
  --line:#E4EBE7;
  --bg:#F4F7F5;
  --card:#FFFFFF;
  --soft:#E8F7F1;
  --grad:linear-gradient(135deg,#0F5B4E 0%,#17A67C 55%,#4FE0B0 100%);
  --r-sm:10px;
  --r-btn:999px;
  --r-card:20px;
  --r-hero:28px;
  --sh-1:0 8px 24px rgba(21,32,28,.06);
  --sh-2:0 16px 40px rgba(21,32,28,.10);
  --sh-3:0 24px 60px rgba(21,32,28,.14);
  --rail:92px;
  --gutter: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","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;line-height:1.75;color:var(--ink);background:var(--bg);
  font-variant-numeric:tabular-nums;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block;object-fit:cover}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;padding:0}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;letter-spacing:.2px}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
dl,dd,dt{margin:0}
:focus-visible{outline:2px solid var(--jade-600);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 var(--gutter)}

/* ============ 左侧竖向导航 ============ */
.rail{
  position:fixed;left:0;top:0;bottom:0;width:var(--rail);z-index:60;
  background:var(--grad);color:#fff;display:flex;flex-direction:column;align-items:center;
  padding:18px 0 20px;box-shadow:0 0 0 1px rgba(255,255,255,.06) inset;
}
.rail-logo{display:flex;flex-direction:column;align-items:center;gap:2px;margin-bottom:26px;text-align:center}
.rail-logo-mark{font-size:15px;font-weight:700;letter-spacing:.5px;line-height:1.2}
.rail-logo-mark em{font-style:normal;color:var(--mint)}
.rail-logo-sub{font-size:10px;color:rgba(255,255,255,.72);letter-spacing:.14em}
.rail-nav{display:flex;flex-direction:column;gap:10px;width:100%;align-items:center;flex:1}
.rail-link{
  position:relative;width:68px;padding:10px 2px;border-radius:14px;
  display:flex;flex-direction:column;align-items:center;gap:5px;
  font-size:10px;line-height:1.3;color:rgba(255,255,255,.82);text-align:center;
  transition:background .2s ease,color .2s ease,transform .2s ease;
}
.rail-link svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.rail-link:hover{background:rgba(255,255,255,.14);color:#fff}
.rail-link.is-active{background:rgba(255,255,255,.2);color:#fff;font-weight:600}
.rail-link.is-active::before{content:"";position:absolute;left:-12px;top:50%;transform:translateY(-50%);width:3px;height:26px;border-radius:0 3px 3px 0;background:var(--amber)}
.rail-link span{letter-spacing:.02em}
.rail-download{
  width:46px;height:46px;border-radius:50%;background:var(--amber);color:#fff;
  display:flex;align-items:center;justify-content:center;box-shadow:0 10px 24px rgba(255,138,61,.42);
  animation:pulse 2s ease-in-out infinite;
}
.rail-download svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.rail-tip{
  position:absolute;left:78px;top:50%;transform:translate(-6px,-50%);
  background:#15201C;color:#fff;font-size:12px;line-height:1;padding:8px 10px;border-radius:8px;
  white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .18s ease,transform .18s ease;
}
.rail-link:hover .rail-tip,.rail-download:hover .rail-tip{opacity:1;transform:translate(0,-50%)}
.rail-download{position:relative}
@keyframes pulse{0%,100%{box-shadow:0 10px 24px rgba(255,138,61,.42)}50%{box-shadow:0 10px 24px rgba(255,138,61,.42),0 0 0 10px rgba(255,138,61,.14)}}

/* ============ 移动端顶部条 + 抽屉 ============ */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:56px;z-index:70;
  background:#fff;border-bottom:1px solid var(--line);align-items:center;justify-content:space-between;
  padding:0 16px;transition:box-shadow .2s ease;
}
.topbar.is-scrolled{box-shadow:0 6px 20px rgba(21,32,28,.08)}
.topbar-brand{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:700}
.topbar-brand i{width:26px;height:26px;border-radius:9px;background:var(--grad);display:inline-block}
.topbar-brand em{font-style:normal;color:var(--jade-700)}
.burger{width:40px;height:40px;border-radius:12px;display:flex;align-items:center;justify-content:center;border:1px solid var(--line)}
.burger svg{width:20px;height:20px;stroke:var(--ink);fill:none;stroke-width:1.8;stroke-linecap:round}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:280px;max-width:84vw;z-index:90;
  background:#fff;box-shadow:var(--sh-3);padding:22px 18px;transform:translateX(102%);
  transition:transform .28s ease;display:flex;flex-direction:column;gap:8px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.drawer-head strong{font-size:15px}
.drawer-close{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);display:flex;align-items:center;justify-content:center}
.drawer-close svg{width:18px;height:18px;stroke:var(--ink);fill:none;stroke-width:1.8;stroke-linecap:round}
.drawer-link{display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:14px;font-size:15px;color:var(--ink);transition:background .18s ease}
.drawer-link svg{width:20px;height:20px;stroke:var(--jade-700);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.drawer-link:hover,.drawer-link.is-active{background:var(--soft);color:var(--jade-900);font-weight:600}
.drawer-dl{margin-top:auto;display:flex;align-items:center;justify-content:center;gap:8px;background:var(--amber);color:#fff;font-weight:600;padding:14px;border-radius:var(--r-btn)}
.drawer-dl svg{width:18px;height:18px;stroke:#fff;fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.scrim{position:fixed;inset:0;background:rgba(21,32,28,.5);z-index:80;opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease}
.scrim.is-open{opacity:1;visibility:visible}

/* ============ 页面骨架 ============ */
.page{margin-left:var(--rail);min-height:100vh;display:flex;flex-direction:column}
main{flex:1}
.section{padding:44px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:28px}
.section-head h2{font-size:28px}
.section-head p{margin-top:8px;color:var(--ink-2);font-size:15px;max-width:660px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:500;letter-spacing:.14em;color:var(--jade-700);margin-bottom:10px}
.eyebrow::before{content:"";width:18px;height:2px;border-radius:2px;background:var(--grad)}

/* ============ Hero ============ */
.hero-wrap{padding:40px 0 8px}
.hero{
  position:relative;overflow:hidden;border-radius:var(--r-hero);color:#fff;
  background-image:linear-gradient(135deg,rgba(15,91,78,.95) 0%,rgba(23,166,124,.88) 52%,rgba(79,224,176,.72) 100%),url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  padding:56px;box-shadow:var(--sh-3);
}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero h1{font-size:40px;line-height:1.22;letter-spacing:.4px}
.hero h1 mark{background:none;color:var(--mint)}
.hero-sub{margin-top:18px;font-size:17px;color:rgba(255,255,255,.9);max-width:520px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}
.hero-media{position:relative;border-radius:var(--r-hero);overflow:hidden;box-shadow:var(--sh-3);background:rgba(255,255,255,.08)}
.hero-media img{width:100%;height:100%;min-height:280px;aspect-ratio:16/11;border-radius:var(--r-hero)}
.hero-media::after{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(15,91,78,.28),rgba(79,224,176,.12));border-radius:var(--r-hero);pointer-events:none}
.badges{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-top:38px}
.badge{
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.3);border-radius:16px;
  padding:14px 16px;backdrop-filter:blur(2px);
}
.badge b{display:block;font-size:17px;font-weight:700;line-height:1.3}
.badge span{display:block;margin-top:4px;font-size:12px;color:rgba(255,255,255,.82)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;
  padding:13px 26px;border-radius:var(--r-btn);border:1px solid transparent;
  transition:transform .18s ease,box-shadow .18s ease,filter .18s ease,background .18s ease,color .18s ease;
}
.btn svg{width:17px;height:17px;stroke:currentColor;fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.btn-primary{background:var(--amber);color:#fff;box-shadow:0 10px 24px rgba(255,138,61,.34)}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 14px 30px rgba(255,138,61,.4)}
.btn-ghost{background:#fff;color:var(--jade-900);border-color:var(--line)}
.btn-ghost:hover{transform:translateY(-1px);box-shadow:var(--sh-2);border-color:#CFE7DD}
.btn-onhero{background:rgba(255,255,255,.16);color:#fff;border-color:rgba(255,255,255,.44)}
.btn-onhero:hover{background:rgba(255,255,255,.24);transform:translateY(-1px)}
.btn:active{transform:translateY(1px);box-shadow:var(--sh-1)}
.btn[disabled]{opacity:.45;cursor:not-allowed}

/* ============ 价值区 ============ */
.value-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--gutter)}
.vcard{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  display:flex;flex-direction:column;transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.vcard:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#CFE7DD}
.vcard-media img{width:100%;aspect-ratio:16/9;object-fit:cover}
.vcard-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1}
.vcard-body h3{font-size:20px;font-weight:600}
.vcard-body p{color:var(--ink-2);font-size:15px}
.vcard-index{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:12px;background:var(--soft);color:var(--jade-700);font-size:13px;font-weight:700}
.vcard-list{display:grid;gap:8px;margin-top:4px}
.vcard-list li{position:relative;padding-left:16px;font-size:14px;color:var(--ink-2)}
.vcard-list li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:var(--mint)}
.vcard--side{flex-direction:row;align-items:stretch}
.vcard--side .vcard-media{flex:0 0 42%}
.vcard--side .vcard-media img{height:100%;aspect-ratio:auto;min-height:200px}

/* ============ 轮播 ============ */
.shots{position:relative}
.shot-track{
  display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:6px 4px 22px;scrollbar-width:none;
}
.shot-track::-webkit-scrollbar{display:none}
.shot-card{
  flex:0 0 min(520px,84%);scroll-snap-align:start;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  transition:transform .22s ease,box-shadow .22s ease;
}
.shot-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.shot-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.shot-body{padding:20px 22px 24px}
.shot-body h3{font-size:18px;font-weight:600;margin-bottom:8px}
.shot-body p{color:var(--ink-2);font-size:14px}
.shot-nav{position:absolute;right:0;top:-64px;display:flex;gap:10px}
.shot-nav button{
  width:42px;height:42px;border-radius:50%;background:rgba(255,255,255,.92);border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;box-shadow:var(--sh-1);transition:background .18s ease,transform .18s ease;
}
.shot-nav button:hover{background:#fff;transform:translateY(-2px)}
.shot-nav svg{width:18px;height:18px;stroke:var(--jade-900);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.dots{display:flex;gap:8px;justify-content:center;margin-top:6px}
.dots button{width:8px;height:8px;border-radius:999px;background:#CADBD4;transition:width .2s ease,background .2s ease}
.dots button.is-active{width:26px;background:var(--jade-600)}

/* ============ 系统要求 ============ */
.spec-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--gutter)}
.spec-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:30px}
.spec-card.recommend{border-color:#C9E9DC;box-shadow:var(--sh-1)}
.spec-tag{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;padding:5px 12px;border-radius:999px;background:var(--soft);color:var(--jade-700)}
.spec-card h3{font-size:20px;font-weight:600;margin:14px 0 18px}
.spec-list{display:grid}
.spec-row{display:flex;justify-content:space-between;gap:18px;padding:13px 0;border-bottom:1px dashed var(--line);font-size:15px}
.spec-row:last-child{border-bottom:0}
.spec-row dt{color:var(--ink-2)}
.spec-row dd{font-weight:600;text-align:right}

/* ============ 评价墙 ============ */
.review-wall{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--gutter)}
.review-col{display:flex;flex-direction:column;gap:var(--gutter)}
.review-col:nth-child(2){padding-top:34px}
.review-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:24px;transition:transform .22s ease,box-shadow .22s ease}
.review-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.review-top{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.avatar{width:42px;height:42px;border-radius:50%;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;flex:0 0 42px}
.review-name{font-size:14px;font-weight:600}
.review-src{font-size:12px;color:var(--ink-2)}
.stars{display:flex;gap:2px;margin-bottom:10px}
.stars svg{width:15px;height:15px;fill:var(--amber);stroke:none}
.review-card p{font-size:14px;color:var(--ink-2)}
.review-tag{display:inline-block;margin-top:14px;font-size:12px;padding:4px 10px;border-radius:999px;background:var(--bg);border:1px solid var(--line);color:var(--ink-2)}

/* ============ 下载区 ============ */
.dl-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--gutter)}
.dl-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:30px;display:flex;flex-direction:column;gap:20px}
.dl-card h3{font-size:20px;font-weight:600;display:flex;align-items:center;gap:10px}
.dl-card h3 svg{width:22px;height:22px;stroke:var(--jade-700);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.dl-meta{display:flex;flex-wrap:wrap;gap:10px}
.dl-meta span{font-size:12px;color:var(--ink-2);background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:5px 12px}
.dl-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:auto}

/* ============ 最新信息 ============ */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gutter)}
.news-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  display:flex;flex-direction:column;transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#CFE7DD}
.news-cover{position:relative;display:block}
.news-cover img{width:100%;aspect-ratio:16/10;object-fit:cover}
.news-cover .tag{position:absolute;left:12px;top:12px}
.tag{display:inline-flex;align-items:center;font-size:12px;font-weight:500;padding:5px 12px;border-radius:999px;background:rgba(255,255,255,.94);color:var(--jade-700);border:1px solid #CFE7DD}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.news-body h3{font-size:17px;font-weight:600;line-height:1.45}
.news-body h3 a:hover{color:var(--jade-700)}
.news-body p{font-size:14px;color:var(--ink-2);flex:1}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--ink-2);border-top:1px solid var(--line);padding-top:12px}
.news-meta a{color:var(--jade-700);font-weight:600}
.news-meta a:hover{text-decoration:underline}
.empty-state{
  grid-column:1/-1;background:var(--card);border:1px dashed #CFE7DD;border-radius:var(--r-card);
  padding:56px 24px;text-align:center;color:var(--ink-2);
}
.empty-state svg{width:44px;height:44px;stroke:var(--jade-600);fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;margin:0 auto 14px}
.empty-state strong{display:block;color:var(--ink);font-size:16px;margin-bottom:6px}
.empty-state a{display:inline-block;margin-top:14px;color:var(--jade-700);font-weight:600}

/* ============ FAQ ============ */
.faq{max-width:900px;margin:0 auto;display:grid;gap:12px}
.faq details{
  background:var(--card);border:1px solid var(--line);border-left:3px solid transparent;
  border-radius:14px;padding:0 22px;transition:border-color .22s ease,box-shadow .22s ease;
}
.faq details:hover{box-shadow:var(--sh-1)}
.faq details[open]{border-left-color:var(--amber);border-color:#DCEDE6;border-left-color:var(--amber)}
.faq summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 0;font-size:16px;font-weight:600;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary svg{width:18px;height:18px;stroke:var(--jade-700);fill:none;stroke-width:2;stroke-linecap:round;transition:transform .22s ease;flex:0 0 18px}
.faq details[open] summary svg{transform:rotate(45deg)}
.faq .faq-body{padding:0 0 20px;font-size:15px;color:var(--ink-2);animation:faqIn .22s ease}
@keyframes faqIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

/* ============ CTA ============ */
.cta{
  border-radius:var(--r-hero);padding:52px;color:#fff;display:flex;align-items:center;justify-content:space-between;
  gap:32px;flex-wrap:wrap;
  background-image:linear-gradient(135deg,rgba(15,91,78,.95) 0%,rgba(23,166,124,.9) 55%,rgba(79,224,176,.78) 100%),url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;box-shadow:var(--sh-2);
}
.cta h2{font-size:28px}
.cta p{margin-top:10px;color:rgba(255,255,255,.86);font-size:15px;max-width:560px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ============ 页脚 ============ */
.footer{position:relative;background:#10221C;color:rgba(255,255,255,.72);margin-top:44px}
.footer::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px;padding:56px 0 34px}
.footer h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px}
.footer-brand-mark{display:flex;align-items:center;gap:10px;color:#fff;font-size:17px;font-weight:700;margin-bottom:14px}
.footer-brand-mark i{width:28px;height:28px;border-radius:9px;background:var(--grad);display:inline-block}
.footer p{font-size:14px;line-height:1.8}
.footer-links{display:grid;gap:10px;font-size:14px}
.footer-links a{transition:color .18s ease}
.footer-links a:hover{color:var(--mint)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding:20px 0 28px;display:flex;
  justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.6);
}
.to-top{
  position:fixed;right:22px;bottom:24px;width:46px;height:46px;border-radius:50%;background:#fff;
  border:1px solid var(--line);box-shadow:var(--sh-2);display:flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transition:opacity .2s ease,visibility .2s ease,transform .2s ease;z-index:50;
}
.to-top.is-visible{opacity:1;visibility:visible}
.to-top:hover{transform:translateY(-3px)}
.to-top svg{width:18px;height:18px;stroke:var(--jade-900);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}

/* ============ 断点 ============ */
@media (max-width:1199px){
  .hero{padding:44px}
  .hero h1{font-size:34px;line-height:1.28}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:28px}
}
@media (max-width:1023px){
  :root{--gutter:20px}
  .rail{display:none}
  .topbar{display:flex}
  .page{margin-left:0;padding-top:56px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero{padding:40px 28px}
  .hero-media img{min-height:200px;aspect-ratio:16/10}
  .badges{grid-template-columns:repeat(2,minmax(0,1fr))}
  .section{padding:32px 0}
  .value-grid,.spec-grid,.dl-grid,.review-wall{grid-template-columns:1fr}
  .review-col:nth-child(2){padding-top:0}
  .shot-nav{top:-58px}
  .shot-card{flex:0 0 min(460px,88%)}
}
@media (max-width:767px){
  .section{padding:24px 0}
  .hero-wrap{padding:20px 0 4px}
  .hero{padding:30px 20px;border-radius:22px}
  .hero h1{font-size:26px;line-height:1.32}
  .hero-sub{font-size:15px}
  .hero-actions .btn{flex:1 1 auto;justify-content:center}
  .badges{gap:10px;margin-top:26px}
  .badge{padding:12px}
  .badge b{font-size:15px}
  .section-head h2{font-size:22px}
  .news-grid{grid-template-columns:1fr}
  .cta{padding:32px 22px;border-radius:22px}
  .cta h2{font-size:22px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto;justify-content:center}
  .footer-grid{grid-template-columns:1fr;gap:24px;padding:40px 0 26px}
  .shot-card{flex:0 0 86%}
  .shot-nav{display:none}
  .dl-actions .btn{flex:1 1 auto;justify-content:center}
  .to-top{right:14px;bottom:16px}
}
@media (max-width:480px){
  .hero h1{font-size:23px}
  .badges{grid-template-columns:1fr 1fr}
  .vcard-body{padding:20px}
  .spec-card,.dl-card{padding:22px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}

/* roulang page: category1 */
:root{
  --c-deep:#0F5B4E;
  --c-primary:#17A67C;
  --c-mint:#4FE0B0;
  --c-amber:#FF8A3D;
  --ink:#15201C;
  --ink-2:#5C6B65;
  --line:#E4EBE7;
  --bg:#F4F7F5;
  --card:#FFFFFF;
  --soft:#E8F7F1;
  --r-s:10px;
  --r-card:20px;
  --r-hero:28px;
  --r-pill:999px;
  --sh-1:0 8px 24px rgba(21,32,28,.06);
  --sh-2:0 16px 40px rgba(21,32,28,.10);
  --sh-3:0 24px 60px rgba(21,32,28,.14);
  --rail:92px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  padding-left:var(--rail);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;letter-spacing:-.01em}
p{margin:0}
ul,ol,dl{margin:0;padding:0}
li{list-style:none}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px}
.tnum{font-variant-numeric:tabular-nums}
.container{max-width:1180px;margin:0 auto;padding:0 24px}

/* ---------- 左侧竖向导航 ---------- */
.rail-nav{
  position:fixed;left:0;top:0;bottom:0;width:var(--rail);z-index:60;
  display:flex;flex-direction:column;align-items:center;
  padding:20px 8px 18px;
  background:linear-gradient(135deg,#0F5B4E 0%,#17A67C 58%,#0F5B4E 100%);
  box-shadow:0 24px 60px rgba(21,32,28,.14);
}
.rail-logo{display:flex;flex-direction:column;align-items:center;gap:7px;margin-bottom:18px}
.rail-logo-mark{
  width:36px;height:36px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg,#4FE0B0,#17A67C);
  color:#07251E;font-weight:700;font-size:16px;
  box-shadow:0 8px 24px rgba(0,0,0,.18);
}
.rail-logo-text{font-size:10px;font-weight:600;color:rgba(255,255,255,.92);letter-spacing:.6px}
.rail-nav > a.rail-link{width:100%}
.rail-link{
  position:relative;
  display:flex;flex-direction:column;align-items:center;gap:6px;
  padding:12px 2px;margin-bottom:6px;
  border-radius:14px;
  font-size:10px;font-weight:500;letter-spacing:.2px;
  color:rgba(255,255,255,.76);
  transition:background .22s ease,color .22s ease,transform .22s ease;
}
.rail-link svg{
  width:22px;height:22px;fill:none;stroke:currentColor;
  stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;
}
.rail-link:hover{background:rgba(255,255,255,.10);color:#fff;transform:translateY(-2px)}
.rail-link.is-active{background:rgba(255,255,255,.16);color:#fff}
.rail-link.is-active::before{
  content:"";position:absolute;left:-8px;top:50%;transform:translateY(-50%);
  width:3px;height:26px;border-radius:0 3px 3px 0;background:var(--c-amber);
}
.rail-tip{
  position:absolute;left:100%;top:50%;transform:translateY(-50%) translateX(-6px);
  margin-left:12px;white-space:nowrap;
  background:#0B3229;color:#fff;font-size:12px;font-weight:500;
  padding:6px 10px;border-radius:10px;
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .2s ease,transform .2s ease;
  box-shadow:var(--sh-2);z-index:5;
}
.rail-link:hover .rail-tip{opacity:1;visibility:visible;transform:translateY(-50%) translateX(0)}
.rail-fab{
  margin-top:auto;
  width:48px;height:48px;border-radius:50%;
  display:grid;place-items:center;
  background:linear-gradient(135deg,#FF8A3D,#FFB073);
  color:#3A1704;box-shadow:0 16px 40px rgba(255,138,61,.35);
  animation:railPulse 2s ease-in-out infinite;
  transition:transform .22s ease;
}
.rail-fab svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.rail-fab:hover{transform:translateY(-2px) scale(1.04)}
@keyframes railPulse{
  0%,100%{box-shadow:0 16px 40px rgba(255,138,61,.30)}
  50%{box-shadow:0 16px 40px rgba(255,138,61,.55)}
}
@media (prefers-reduced-motion:reduce){
  .rail-fab{animation:none}
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
}
.rail-nav :focus-visible{outline-color:var(--c-mint)}

/* ---------- 移动端顶栏与抽屉 ---------- */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:56px;z-index:90;
  align-items:center;justify-content:space-between;
  padding:0 16px;background:#fff;border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.topbar.is-scrolled{box-shadow:0 8px 24px rgba(21,32,28,.08)}
.topbar-brand{display:flex;align-items:center;gap:9px;font-size:14px;font-weight:700}
.topbar-brand .rail-logo-mark{width:30px;height:30px;border-radius:10px;font-size:14px}
.burger{
  width:40px;height:40px;border:1px solid var(--line);border-radius:12px;
  background:#fff;display:grid;place-items:center;cursor:pointer;
}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);position:relative}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:var(--ink);
}
.burger span::before{top:-6px}
.burger span::after{top:6px}
.drawer-mask{
  position:fixed;inset:0;background:rgba(21,32,28,.5);z-index:99;
  opacity:0;visibility:hidden;transition:opacity .28s ease,visibility .28s ease;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:286px;max-width:86vw;z-index:100;
  background:#fff;padding:20px 16px;
  transform:translateX(100%);transition:transform .28s ease;
  display:flex;flex-direction:column;gap:6px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.drawer-title{font-size:15px;font-weight:700}
.drawer-close{
  width:36px;height:36px;border-radius:10px;border:1px solid var(--line);
  background:#fff;cursor:pointer;font-size:18px;line-height:1;color:var(--ink-2);
}
.drawer-link{
  display:flex;align-items:center;gap:12px;
  padding:13px 14px;border-radius:14px;
  font-size:14px;font-weight:500;color:var(--ink);
  border:1px solid transparent;
  transition:background .2s ease,border-color .2s ease,color .2s ease;
}
.drawer-link svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;color:var(--c-primary)}
.drawer-link:hover{background:var(--soft)}
.drawer-link.is-active{background:var(--soft);border-color:#BEE9DA;color:var(--c-deep);font-weight:600}
.drawer-cta{
  margin-top:auto;
  display:flex;align-items:center;justify-content:center;gap:8px;
  padding:14px;border-radius:var(--r-pill);
  background:linear-gradient(135deg,#FF8A3D,#FFB073);color:#3A1704;
  font-weight:600;font-size:14px;
}

/* ---------- 通用板块 ---------- */
.page-main{padding:32px 0 0}
.section{margin-top:88px}
.section:first-child{margin-top:0}
.section-head{max-width:720px;margin-bottom:32px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:1.2px;text-transform:uppercase;
  color:var(--c-primary);margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:linear-gradient(135deg,#17A67C,#4FE0B0)}
.section-head h2{
  font-size:28px;position:relative;padding-left:16px;
}
.section-head h2::before{
  content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:4px;border-radius:4px;
  background:linear-gradient(135deg,#17A67C,#4FE0B0);
}
.section-head p{margin-top:14px;color:var(--ink-2);font-size:15.5px}

/* ---------- Hero 横幅 ---------- */
.hero{
  position:relative;overflow:hidden;
  border-radius:var(--r-hero);
  padding:56px 48px 48px;
  color:#fff;
  background-image:
    linear-gradient(135deg,rgba(15,91,78,.94) 0%,rgba(23,166,124,.80) 55%,rgba(15,91,78,.90) 100%),
    url("/assets/images/backpic/back-1.png");
  background-size:cover,cover;
  background-position:center,center;
  box-shadow:var(--sh-3);
}
.hero::after{
  content:"";position:absolute;right:-90px;top:-90px;width:320px;height:320px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(79,224,176,.34),rgba(79,224,176,0) 68%);
  pointer-events:none;
}
.hero-inner{position:relative;z-index:2;max-width:760px}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.3);
  font-size:12.5px;font-weight:500;letter-spacing:.3px;
}
.hero h1{
  margin-top:20px;
  font-size:40px;line-height:1.2;letter-spacing:-.015em;
}
.hero-sub{margin-top:16px;font-size:17px;color:rgba(255,255,255,.9);max-width:620px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-badges{display:flex;flex-wrap:wrap;gap:12px;margin-top:38px}
.badge{
  min-width:150px;
  padding:14px 18px;border-radius:16px;
  background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.28);
  backdrop-filter:blur(2px);
}
.badge b{display:block;font-size:15px;font-weight:600;letter-spacing:.2px}
.badge span{display:block;margin-top:4px;font-size:12px;color:rgba(255,255,255,.78)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:9px;
  padding:13px 26px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease,background .2s ease;
}
.btn svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.btn-primary{
  background:linear-gradient(135deg,#FF8A3D,#FFB073);color:#3A1704;
  box-shadow:0 12px 28px rgba(255,138,61,.32);
}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 16px 34px rgba(255,138,61,.4)}
.btn-primary:active{transform:translateY(1px);box-shadow:0 8px 18px rgba(255,138,61,.3)}
.btn-ghost{
  background:rgba(255,255,255,.10);color:#fff;
  border-color:rgba(255,255,255,.42);
}
.btn-ghost:hover{background:rgba(255,255,255,.2);transform:translateY(-1px)}
.btn-light{
  background:#fff;color:var(--c-deep);border-color:var(--line);box-shadow:var(--sh-1);
}
.btn-light:hover{transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-solid{
  background:linear-gradient(135deg,#0F5B4E,#17A67C);color:#fff;
  box-shadow:0 12px 28px rgba(23,166,124,.28);
}
.btn-solid:hover{filter:brightness(1.06);transform:translateY(-1px)}

/* ---------- 图文交错 ---------- */
.split{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
  padding:32px;border-radius:var(--r-hero);
  background:var(--card);border:1px solid var(--line);box-shadow:var(--sh-1);
  transition:box-shadow .28s ease,transform .28s ease,border-color .28s ease;
}
.split + .split{margin-top:32px}
.split:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#CFE9DF}
.split-media{position:relative;border-radius:var(--r-card);overflow:hidden;background:var(--soft)}
.split-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.split-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(23,166,124,.14),rgba(15,91,78,.06));
  pointer-events:none;
}
.split-body h3{font-size:22px}
.split-body p{margin-top:14px;color:var(--ink-2);font-size:15.5px}
.split--reverse .split-media{order:2}
.check-list{margin-top:20px;display:grid;gap:12px}
.check-list li{
  position:relative;padding-left:28px;font-size:15px;color:var(--ink);
}
.check-list li::before{
  content:"";position:absolute;left:0;top:.52em;
  width:16px;height:16px;border-radius:50%;
  background:var(--soft);
  border:1px solid #BEE9DA;
}
.check-list li::after{
  content:"";position:absolute;left:5px;top:.78em;
  width:6px;height:3px;border-left:2px solid var(--c-primary);border-bottom:2px solid var(--c-primary);
  transform:rotate(-45deg);
}
.text-link{
  display:inline-flex;align-items:center;gap:6px;margin-top:20px;
  font-size:14.5px;font-weight:600;color:var(--c-primary);
  border-bottom:1px solid transparent;transition:border-color .2s ease,color .2s ease;
}
.text-link:hover{border-color:var(--c-primary);color:var(--c-deep)}
.text-link svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}

/* ---------- 步骤块 ---------- */
.steps{display:grid;gap:18px;margin-top:8px}
.step{
  display:flex;gap:22px;align-items:flex-start;
  padding:26px;border-radius:var(--r-card);
  background:var(--card);border:1px solid var(--line);box-shadow:var(--sh-1);
  transition:transform .26s ease,box-shadow .26s ease,border-color .26s ease;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#CFE9DF}
.step-no{
  flex:0 0 auto;width:46px;height:46px;border-radius:14px;
  display:grid;place-items:center;
  font-size:15px;font-weight:700;letter-spacing:.4px;
  color:#07251E;
  background:linear-gradient(135deg,#4FE0B0,#17A67C);
  box-shadow:0 8px 20px rgba(23,166,124,.24);
}
.step-body h3{font-size:19px}
.step-body p{margin-top:10px;color:var(--ink-2);font-size:15px}
.step-body ul{margin-top:12px;display:grid;gap:8px}
.step-body ul li{position:relative;padding-left:20px;font-size:14.5px;color:var(--ink-2)}
.step-body ul li::before{
  content:"";position:absolute;left:4px;top:.72em;
  width:6px;height:6px;border-radius:50%;background:var(--c-primary);opacity:.7;
}

/* ---------- 规格卡 ---------- */
.spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.spec-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--sh-1);
  transition:transform .26s ease,box-shadow .26s ease,border-color .26s ease;
}
.spec-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#CFE9DF}
.spec-card h3{font-size:18px;display:flex;align-items:center;gap:10px}
.spec-card h3 i{
  width:10px;height:10px;border-radius:50%;background:var(--c-primary);
  display:inline-block;
}
.spec-card.is-accent h3 i{background:var(--c-amber)}
.spec-list{margin-top:18px;display:grid;gap:0}
.spec-row{
  display:flex;justify-content:space-between;gap:16px;
  padding:13px 0;border-bottom:1px dashed var(--line);
  font-size:14.5px;
}
.spec-row:last-child{border-bottom:0}
.spec-row dt{color:var(--ink-2)}
.spec-row dd{margin:0;font-weight:600;text-align:right;color:var(--ink)}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:14px;max-width:900px}
.faq-item{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;
  transition:box-shadow .26s ease,border-color .26s ease;
}
.faq-item:hover{box-shadow:var(--sh-2);border-color:#CFE9DF}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 24px 20px 22px;
  font-size:16.5px;font-weight:600;color:var(--ink);
  position:relative;
  transition:color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:4px;border-radius:0 4px 4px 0;
  background:linear-gradient(135deg,#17A67C,#4FE0B0);
  transition:background .22s ease;
}
.faq-item summary::after{
  content:"";flex:0 0 auto;width:10px;height:10px;
  border-right:2px solid var(--ink-2);border-bottom:2px solid var(--ink-2);
  transform:rotate(45deg);transition:transform .22s ease,border-color .22s ease;
  margin-right:4px;
}
.faq-item[open] summary::before{background:linear-gradient(135deg,#FF8A3D,#FFB073)}
.faq-item[open] summary::after{transform:rotate(-135deg);border-color:var(--c-amber)}
.faq-body{padding:0 24px 22px 22px;color:var(--ink-2);font-size:15px}
.faq-body p + p{margin-top:12px}

/* ---------- CTA 横条 ---------- */
.cta-bar{
  margin-top:88px;
  border-radius:var(--r-hero);
  padding:44px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  color:#fff;
  background-image:linear-gradient(135deg,rgba(15,91,78,.96),rgba(23,166,124,.88));
  box-shadow:var(--sh-3);
}
.cta-bar h2{font-size:26px}
.cta-bar p{margin-top:12px;color:rgba(255,255,255,.86);font-size:15px;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;flex:0 0 auto}

/* ---------- 页脚 ---------- */
.footer{
  margin-top:88px;
  background:#0E1F1B;color:rgba(255,255,255,.78);
  padding:64px 0 26px;position:relative;
}
.footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:3px;
  background:linear-gradient(135deg,#0F5B4E,#17A67C,#4FE0B0);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px}
.footer-brand-mark{
  display:flex;align-items:center;gap:10px;
  font-size:16px;font-weight:700;color:#fff;margin-bottom:16px;
}
.footer-brand-mark i{
  width:30px;height:30px;border-radius:10px;display:inline-block;
  background:linear-gradient(135deg,#4FE0B0,#17A67C);
}
.footer p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.66)}
.footer h4{font-size:14.5px;color:#fff;margin-bottom:16px;font-weight:600}
.footer-links{display:grid;gap:11px}
.footer-links a,.footer-links span{font-size:14px;color:rgba(255,255,255,.68);transition:color .2s ease,transform .2s ease}
.footer-links a:hover{color:var(--c-mint);transform:translateX(2px)}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.52);
}

/* ---------- 返回顶部 ---------- */
.back-top{
  position:fixed;right:24px;bottom:28px;z-index:80;
  width:46px;height:46px;border-radius:50%;border:0;cursor:pointer;
  display:grid;place-items:center;
  background:linear-gradient(135deg,#0F5B4E,#17A67C);color:#fff;
  box-shadow:var(--sh-2);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .25s ease,visibility .25s ease,transform .25s ease;
}
.back-top.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .hero{padding:48px 36px 42px}
  .hero h1{font-size:34px}
  .split{gap:36px;padding:26px}
}
@media (max-width:1023px){
  body{padding-left:0;padding-top:56px}
  .rail-nav{display:none}
  .topbar{display:flex}
  .page-main{padding-top:24px}
  .section{margin-top:64px}
  .hero{border-radius:22px;padding:38px 26px 34px}
  .hero h1{font-size:29px}
  .hero-sub{font-size:16px}
  .split{grid-template-columns:1fr;gap:24px;padding:22px;border-radius:22px}
  .split--reverse .split-media{order:0}
  .spec-grid{grid-template-columns:1fr}
  .cta-bar{margin-top:64px;flex-direction:column;align-items:flex-start;padding:34px 28px;border-radius:22px}
  .cta-bar h2{font-size:23px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .footer{margin-top:64px;padding:52px 0 24px}
  .section-head h2{font-size:24px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .hero h1{font-size:26px}
  .hero-badges{gap:10px;margin-top:28px}
  .badge{min-width:calc(50% - 5px);flex:1 1 auto;padding:12px 14px}
  .btn{padding:12px 20px;font-size:14.5px}
  .section{margin-top:48px}
  .section-head h2{font-size:22px}
  .section-head p{font-size:15px}
  .step{flex-direction:column;gap:16px;padding:22px}
  .step-body h3{font-size:17.5px}
  .faq-item summary{padding:18px 18px 18px 18px;font-size:15.5px}
  .faq-body{padding:0 18px 18px 18px;font-size:14.5px}
  .split-body h3{font-size:19px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;font-size:12.5px}
  .back-top{right:16px;bottom:20px}
}
@media (max-width:480px){
  .hero{padding:30px 18px 28px}
  .hero h1{font-size:23px}
  .hero-actions{gap:10px}
  .hero-actions .btn{width:100%;justify-content:center}
  .badge{min-width:100%}
  .spec-card{padding:22px}
  .footer-brand-mark{font-size:15px}
}

/* roulang page: article */
:root{
  --brand-deep:#0F5B4E;
  --brand:#17A67C;
  --brand-light:#4FE0B0;
  --accent:#FF8A3D;
  --accent-deep:#FF6F1E;
  --ink:#15201C;
  --ink-2:#5C6B65;
  --line:#E4EBE7;
  --bg:#F4F7F5;
  --mint:#E8F7F1;
  --card:#FFFFFF;
  --grad-brand:linear-gradient(135deg,#0F5B4E 0%,#17A67C 58%,#4FE0B0 100%);
  --grad-accent:linear-gradient(135deg,#FF8A3D 0%,#FF6F1E 100%);
  --r-s:10px;
  --r-m:14px;
  --r-card:20px;
  --r-hero:28px;
  --sh-1:0 8px 24px rgba(21,32,28,.06);
  --sh-2:0 16px 40px rgba(21,32,28,.10);
  --sh-3:0 24px 60px rgba(21,32,28,.14);
  --rail-w:92px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  font-feature-settings:"tnum";
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4,p{margin:0}
svg{display:block}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
::selection{background:rgba(23,166,124,.2)}

.container{width:100%;max-width:1180px;margin:0 auto;padding:0 32px}

/* ============ 左侧竖向导航 ============ */
.rail-nav{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail-w);z-index:80;
  display:flex;flex-direction:column;align-items:center;gap:6px;
  padding:16px 8px 20px;
  background:linear-gradient(135deg,#0F5B4E 0%,#116A58 48%,#0B463C 100%);
}
.rail-brand{
  width:100%;text-align:center;color:#EAFBF4;font-size:11px;font-weight:700;
  line-height:1.3;letter-spacing:.4px;padding:6px 0 16px;
}
.rail-brand i{
  display:block;width:36px;height:36px;margin:0 auto 8px;border-radius:12px;
  background:linear-gradient(135deg,#4FE0B0,#17A67C);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.28),0 6px 16px rgba(0,0,0,.22);
  position:relative;
}
.rail-brand i::after{
  content:"";position:absolute;inset:10px;border-radius:5px;
  border:2px solid rgba(255,255,255,.92);border-bottom-color:transparent;
}
.rail-link{
  position:relative;width:76px;display:flex;flex-direction:column;align-items:center;gap:6px;
  padding:10px 4px;border-radius:var(--r-m);color:rgba(234,251,244,.78);
  font-size:10px;font-weight:500;letter-spacing:.2px;
  transition:background .2s ease,color .2s ease,transform .2s ease;
}
.rail-link svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.rail-link span{white-space:nowrap}
.rail-link:hover{background:rgba(255,255,255,.12);color:#fff}
.rail-link.is-active{background:rgba(255,255,255,.18);color:#fff}
.rail-link.is-active::before{
  content:"";position:absolute;left:-6px;top:50%;transform:translateY(-50%);
  width:3px;height:26px;border-radius:0 3px 3px 0;background:var(--accent);
}
.rail-tip{
  position:absolute;left:84px;top:50%;
  transform:translateY(-50%) translateX(-6px);
  background:#15201C;color:#fff;font-size:12px;font-weight:400;
  padding:6px 10px;border-radius:8px;white-space:nowrap;
  opacity:0;pointer-events:none;transition:opacity .2s ease,transform .2s ease;z-index:90;
  box-shadow:var(--sh-3);
}
.rail-link:hover .rail-tip{opacity:1;transform:translateY(-50%) translateX(0)}
.rail-download{
  margin-top:auto;width:52px;height:52px;border-radius:50%;
  display:grid;place-items:center;color:#fff;
  background:var(--grad-accent);box-shadow:0 10px 24px rgba(255,138,61,.36);
  animation:railPulse 2s ease-in-out infinite;
  transition:transform .2s ease,filter .2s ease;
}
.rail-download svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.rail-download:hover{transform:translateY(-1px);filter:brightness(1.06)}
@keyframes railPulse{
  0%,100%{box-shadow:0 0 0 0 rgba(255,138,61,.45),0 10px 24px rgba(255,138,61,.3)}
  50%{box-shadow:0 0 0 10px rgba(255,138,61,0),0 10px 24px rgba(255,138,61,.3)}
}
@media (prefers-reduced-motion:reduce){
  .rail-download{animation:none}
  html{scroll-behavior:auto}
}

/* ============ 移动端顶栏与抽屉 ============ */
.mobile-bar{
  display:none;position:fixed;top:0;left:0;right:0;height:56px;z-index:95;
  align-items:center;justify-content:space-between;padding:0 16px;
  background:#fff;border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.mobile-bar.is-scrolled{box-shadow:0 6px 18px rgba(21,32,28,.08)}
.mobile-brand{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:700;color:var(--ink)}
.mobile-brand i{width:22px;height:22px;border-radius:8px;background:var(--grad-brand);display:block}
.burger{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;border:1px solid var(--line)}
.burger svg{width:20px;height:20px;fill:none;stroke:var(--ink);stroke-width:1.8;stroke-linecap:round}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(300px,84vw);z-index:110;
  background:#fff;box-shadow:var(--sh-3);padding:20px 18px;
  transform:translateX(102%);transition:transform .28s ease;
  display:flex;flex-direction:column;gap:6px;
}
.drawer.is-open{transform:translateX(0)}
.drawer-title{font-size:13px;color:var(--ink-2);letter-spacing:.6px;padding:4px 8px 12px;border-bottom:1px solid var(--line);margin-bottom:10px}
.drawer a{
  display:flex;align-items:center;gap:12px;padding:13px 12px;border-radius:var(--r-m);
  font-size:15px;font-weight:500;color:var(--ink);transition:background .2s ease,color .2s ease;
}
.drawer a svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.drawer a:hover{background:var(--mint);color:var(--brand-deep)}
.drawer a.is-active{background:var(--mint);color:var(--brand-deep);font-weight:600}
.drawer .drawer-download{
  margin-top:auto;justify-content:center;background:var(--grad-accent);color:#fff;font-weight:600;
}
.drawer .drawer-download:hover{background:var(--grad-accent);color:#fff;filter:brightness(1.06)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(21,32,28,.5);z-index:105;
  opacity:0;visibility:hidden;transition:opacity .28s ease,visibility .28s ease;
}
.drawer-mask.is-open{opacity:1;visibility:visible}

/* ============ 页面骨架 ============ */
.page{margin-left:var(--rail-w);min-height:100vh;display:flex;flex-direction:column}
.page-main{flex:1}

/* ============ 文章头部 ============ */
.article-head{
  position:relative;padding:48px 0 40px;border-bottom:1px solid var(--line);
  background-image:linear-gradient(180deg,rgba(244,247,245,.93),rgba(244,247,245,.99)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-2);margin-bottom:20px;flex-wrap:wrap}
.breadcrumb a{color:var(--ink-2);transition:color .2s ease}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:#B9C6C1}
.breadcrumb .current{max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--ink);font-weight:500}
.article-title{
  font-size:clamp(24px,3.4vw,36px);line-height:1.3;font-weight:700;
  letter-spacing:-.2px;color:var(--ink);max-width:860px;
}
.article-meta{display:flex;align-items:center;flex-wrap:wrap;gap:10px 18px;margin-top:20px;font-size:13px;color:var(--ink-2)}
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;
  background:var(--mint);color:var(--brand-deep);border:1px solid rgba(23,166,124,.24);
  font-size:12px;font-weight:600;letter-spacing:.2px;
}
.meta-dot{width:4px;height:4px;border-radius:50%;background:#C6D3CE;display:inline-block}

/* ============ 文章布局 ============ */
.article-layout{max-width:1180px;margin:0 auto;padding:36px 32px 76px}
.article-main{min-width:0}
.article-body{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:40px 44px;box-shadow:var(--sh-1);
  font-size:16px;line-height:1.8;color:var(--ink);
  overflow-wrap:break-word;
}
.article-body > *:first-child{margin-top:0}
.article-body p{margin:0 0 18px}
.article-body p.is-lead{
  position:relative;background:var(--mint);border-radius:12px;
  padding:18px 20px 18px 24px;margin-bottom:26px;font-size:16px;color:#1E3A32;
}
.article-body p.is-lead::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:4px;border-radius:0 4px 4px 0;
  background:linear-gradient(180deg,#17A67C,#4FE0B0);
}
.article-body h2{
  position:relative;font-size:24px;line-height:1.4;font-weight:700;color:var(--ink);
  margin:38px 0 16px;padding-left:14px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:4px;
  background:linear-gradient(180deg,#17A67C,#4FE0B0);
}
.article-body h3{
  position:relative;font-size:19px;line-height:1.45;font-weight:700;color:var(--ink);
  margin:28px 0 12px;padding-left:12px;
}
.article-body h3::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:3px;
  background:var(--accent);opacity:.85;
}
.article-body h4{font-size:16px;font-weight:600;margin:22px 0 10px;color:var(--brand-deep)}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:24px}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin-bottom:8px}
.article-body li::marker{color:var(--brand)}
.article-body a{color:var(--brand-deep);border-bottom:1px solid rgba(23,166,124,.4);transition:color .2s ease,border-color .2s ease}
.article-body a:hover{color:var(--accent-deep);border-color:var(--accent)}
.article-body strong{font-weight:700;color:var(--ink)}
.article-body blockquote{
  margin:22px 0;padding:16px 20px;background:#F7FBF9;border-left:4px solid var(--brand);
  border-radius:0 12px 12px 0;color:#28453C;font-size:15px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-m);margin:8px 0 6px;box-shadow:var(--sh-1)}
.article-body figure{margin:22px 0}
.article-body figcaption{font-size:13px;color:var(--ink-2);text-align:center;margin-top:8px;line-height:1.6}
.article-body hr{border:0;border-top:1px solid var(--line);margin:30px 0}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px;
  background:#F1F6F4;border:1px solid var(--line);border-radius:6px;padding:1px 6px;color:#1E3A32;
}
.article-body pre{
  background:#15201C;color:#D9F2E9;border-radius:var(--r-m);padding:18px 20px;
  overflow-x:auto;font-size:14px;line-height:1.7;margin:20px 0;
}
.article-body pre code{background:none;border:0;color:inherit;padding:0}
.table-scroll{width:100%;overflow-x:auto;margin:22px 0;border:1px solid var(--line);border-radius:var(--r-m);background:#fff}
.table-scroll table{width:100%;border-collapse:collapse;font-size:14px;min-width:520px}
.table-scroll th,.table-scroll td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line)}
.table-scroll th{background:#F4F9F7;font-weight:600;color:var(--brand-deep);white-space:nowrap}
.table-scroll tr:last-child td{border-bottom:0}

.empty-state{
  text-align:center;padding:56px 24px;background:#FBFDFC;border:1px dashed var(--line);border-radius:var(--r-m);
}
.empty-state svg{width:52px;height:52px;margin:0 auto 18px;fill:none;stroke:#9DB3AC;stroke-width:1.4;stroke-linecap:round;stroke-linejoin:round}
.empty-state h2{font-size:20px;font-weight:700;margin-bottom:8px;padding:0}
.empty-state h2::before{display:none}
.empty-state p{color:var(--ink-2);font-size:14px;margin-bottom:22px}

/* ============ 目录 ============ */
.article-toc{display:none}
.toc-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px 18px;box-shadow:var(--sh-1);
}
.toc-card h3{font-size:13px;letter-spacing:.8px;color:var(--ink-2);font-weight:600;margin-bottom:14px}
.toc-list{margin:0;padding:0;list-style:none;border-left:1px solid var(--line)}
.toc-list li{margin:0}
.toc-list a{
  display:block;padding:7px 0 7px 14px;margin-left:-1px;border-left:2px solid transparent;
  font-size:13px;line-height:1.55;color:var(--ink-2);
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.toc-list a:hover{color:var(--brand-deep)}
.toc-list a.is-current{color:var(--brand-deep);font-weight:600;border-left-color:var(--accent);background:linear-gradient(90deg,rgba(232,247,241,.9),rgba(232,247,241,0))}

/* ============ CTA 横条 ============ */
.cta-bar{
  margin-top:36px;border-radius:var(--r-card);padding:28px 32px;
  background:var(--grad-brand);color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  box-shadow:var(--sh-2);position:relative;overflow:hidden;
}
.cta-bar::after{
  content:"";position:absolute;right:-40px;top:-60px;width:200px;height:200px;border-radius:50%;
  background:rgba(255,255,255,.12);
}
.cta-bar h3{font-size:20px;font-weight:700;margin-bottom:6px;position:relative;z-index:1}
.cta-bar p{font-size:14px;color:rgba(255,255,255,.86);position:relative;z-index:1}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:1}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:999px;font-size:15px;font-weight:600;
  border:1px solid transparent;white-space:nowrap;
  transition:transform .18s ease,box-shadow .18s ease,filter .18s ease,background .18s ease,color .18s ease;
}
.btn svg{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.btn:active{transform:translateY(1px) scale(.995)}
.btn-primary{background:var(--grad-accent);color:#fff;box-shadow:0 10px 22px rgba(255,111,30,.28)}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 14px 28px rgba(255,111,30,.34)}
.btn-solid{background:var(--grad-brand);color:#fff;box-shadow:0 10px 22px rgba(15,91,78,.24)}
.btn-solid:hover{filter:brightness(1.06);transform:translateY(-1px)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:rgba(23,166,124,.5);color:var(--brand-deep);transform:translateY(-1px)}
.cta-bar .btn-ghost{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.46);color:#fff}
.cta-bar .btn-ghost:hover{background:rgba(255,255,255,.22);color:#fff}

/* ============ 相关推荐 ============ */
.related{margin-top:54px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px;flex-wrap:wrap}
.section-head h2{font-size:24px;font-weight:700;letter-spacing:-.2px}
.section-head p{font-size:14px;color:var(--ink-2);margin-top:6px}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{
  display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(23,166,124,.45)}
.card-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:#E8F1ED}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.card:hover .card-media img{transform:scale(1.04)}
.card-flag{
  position:absolute;left:12px;top:12px;padding:4px 10px;border-radius:999px;
  background:rgba(255,255,255,.94);color:var(--brand-deep);font-size:12px;font-weight:600;
  box-shadow:0 4px 12px rgba(21,32,28,.12);
}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:17px;font-weight:600;line-height:1.45}
.card-body p{font-size:14px;color:var(--ink-2);line-height:1.7;flex:1}
.card-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-deep)}
.card-link svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s ease}
.card:hover .card-link svg{transform:translateX(3px)}

.back-list{
  margin-top:34px;display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:600;color:var(--ink-2);padding:10px 18px;border-radius:999px;
  border:1px solid var(--line);background:#fff;transition:all .2s ease;
}
.back-list:hover{color:var(--brand-deep);border-color:rgba(23,166,124,.5);transform:translateY(-1px)}
.back-list svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:26px;bottom:26px;width:46px;height:46px;border-radius:50%;
  background:#fff;border:1px solid var(--line);box-shadow:var(--sh-2);
  display:grid;place-items:center;z-index:70;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .24s ease,transform .24s ease,visibility .24s ease;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top svg{width:18px;height:18px;fill:none;stroke:var(--brand-deep);stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.to-top:hover{background:var(--mint)}

/* ============ 页脚 ============ */
.footer{
  margin-left:var(--rail-w);background:#0E1F1A;color:rgba(233,246,241,.72);
  border-top:3px solid transparent;
  background-image:linear-gradient(#0E1F1A,#0E1F1A),linear-gradient(135deg,#0F5B4E,#17A67C,#4FE0B0);
  background-origin:border-box;background-clip:padding-box,border-box;
  padding:56px 0 26px;font-size:14px;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:36px}
.footer-brand-mark{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:700;color:#EAFBF4;margin-bottom:14px}
.footer-brand-mark i{width:26px;height:26px;border-radius:9px;background:var(--grad-brand);display:block}
.footer p{line-height:1.8;font-size:13.5px;color:rgba(233,246,241,.62);max-width:330px}
.footer h4{font-size:14px;font-weight:600;color:#EAFBF4;margin-bottom:16px;letter-spacing:.3px}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a,.footer-links span{color:rgba(233,246,241,.68);font-size:13.5px;transition:color .2s ease}
.footer-links a:hover{color:var(--brand-light)}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(233,246,241,.14);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:rgba(233,246,241,.5);
}

/* ============ 断点 ============ */
@media (max-width:1439px){
  .article-layout{padding-left:28px;padding-right:28px}
}
@media (min-width:1200px){
  .article-layout{display:grid;grid-template-columns:minmax(0,760px) 244px;gap:52px;justify-content:center;align-items:start}
  .article-toc{display:block;position:sticky;top:28px;align-self:start}
}
@media (max-width:1199px){
  .article-layout{padding-top:30px}
  .article-body{padding:34px 32px}
  .related-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1023px){
  .rail-nav{display:none}
  .mobile-bar{display:flex}
  .page{margin-left:0;padding-top:56px}
  .footer{margin-left:0}
  .to-top{right:16px;bottom:16px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .article-head{padding:32px 0 28px}
  .article-layout{padding:24px 20px 56px}
  .article-body{padding:24px 20px;border-radius:16px;font-size:15.5px}
  .article-body h2{font-size:20px;margin-top:30px}
  .article-body h3{font-size:17px}
  .article-body p.is-lead{padding:16px 16px 16px 20px}
  .breadcrumb .current{max-width:180px}
  .cta-bar{padding:22px 20px;border-radius:16px}
  .cta-bar h3{font-size:18px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1}
  .related-grid{grid-template-columns:1fr;gap:18px}
  .section-head h2{font-size:20px}
  .footer{padding:42px 0 22px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
  .footer-brand-mark{grid-column:1 / -1}
  .footer-grid > div:first-child{grid-column:1 / -1}
}
@media (max-width:480px){
  .article-title{font-size:22px}
  .article-meta{gap:8px 12px;font-size:12.5px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px}
  .btn{width:100%}
  .back-list{width:100%;justify-content:center}
}

/* roulang page: category2 */
:root{
  --jade-900:#0F5B4E;
  --jade-600:#17A67C;
  --jade-300:#4FE0B0;
  --amber:#FF8A3D;
  --ink:#15201C;
  --ink-2:#5C6B65;
  --line:#E4EBE7;
  --bg:#F4F7F5;
  --card:#FFFFFF;
  --mint:#E8F7F1;
  --grad:linear-gradient(135deg,#0F5B4E 0%,#17A67C 55%,#4FE0B0 100%);
  --r-sm:10px;
  --r-btn:999px;
  --r-card:20px;
  --r-hero:28px;
  --sh-1:0 8px 24px rgba(21,32,28,.06);
  --sh-2:0 16px 40px rgba(21,32,28,.10);
  --sh-3:0 24px 60px rgba(21,32,28,.14);
  --rail:92px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;object-fit:cover}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure{margin:0}
ul,ol{padding-left:1.15em}
:focus-visible{outline:2px solid var(--jade-600);outline-offset:2px;border-radius:6px}

/* ============ 左侧竖向导航 ============ */
.rail-brand{
  position:fixed;top:16px;left:0;width:var(--rail);
  display:flex;flex-direction:column;align-items:center;gap:2px;
  color:#fff;z-index:61;text-align:center;padding:6px 4px;
}
.rail-brand b{font-size:12px;font-weight:700;letter-spacing:.5px;line-height:1.2}
.rail-brand span{font-size:10px;opacity:.78;line-height:1.2}
.rail-brand i{
  display:block;width:26px;height:26px;border-radius:8px;
  background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.28);
  margin-bottom:4px;
  position:relative;
}
.rail-brand i::after{
  content:"";position:absolute;inset:8px;border-radius:50%;
  background:linear-gradient(135deg,#4FE0B0,#FF8A3D);
}
.rail-nav{
  position:fixed;inset:0 auto 0 0;width:var(--rail);
  background:var(--grad);
  display:flex;flex-direction:column;align-items:center;
  gap:10px;padding:96px 8px 104px;z-index:60;
}
.rail-link{
  position:relative;width:64px;padding:10px 4px 8px;
  border-radius:14px;color:#fff;text-align:center;
  display:flex;flex-direction:column;align-items:center;gap:5px;
  transition:background .2s ease,transform .2s ease;
}
.rail-link svg{
  width:22px;height:22px;fill:none;stroke:currentColor;
  stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;
}
.rail-link span:not(.rail-tip){font-size:10px;font-weight:500;line-height:1.2;letter-spacing:.2px}
.rail-link:hover{background:rgba(255,255,255,.14);transform:translateY(-2px)}
.rail-link.is-active{background:rgba(255,255,255,.20)}
.rail-link.is-active::before{
  content:"";position:absolute;left:-8px;top:50%;transform:translateY(-50%);
  width:3px;height:26px;border-radius:3px;background:var(--amber);
}
.rail-tip{
  position:absolute;left:70px;top:50%;transform:translateY(-50%) translateX(-6px);
  background:rgba(21,32,28,.92);color:#fff;font-size:12px;font-weight:500;
  padding:5px 10px;border-radius:8px;white-space:nowrap;
  opacity:0;visibility:hidden;transition:.2s ease;pointer-events:none;z-index:5;
}
.rail-link:hover .rail-tip{opacity:1;visibility:visible;transform:translateY(-50%) translateX(0)}
.rail-cta{
  position:fixed;left:22px;bottom:26px;width:48px;height:48px;border-radius:50%;
  background:var(--amber);color:#fff;display:flex;align-items:center;justify-content:center;
  box-shadow:0 10px 26px rgba(255,138,61,.42);z-index:62;
  transition:transform .2s ease,filter .2s ease;
}
.rail-cta svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.rail-cta::after{
  content:"";position:absolute;inset:-6px;border-radius:50%;
  border:2px solid rgba(255,138,61,.45);animation:pulse 1.9s ease-out infinite;
}
.rail-cta:hover{transform:translateY(-2px) scale(1.04);filter:brightness(1.06)}
@keyframes pulse{0%{transform:scale(.9);opacity:.85}70%{transform:scale(1.22);opacity:0}100%{opacity:0}}
@media (prefers-reduced-motion:reduce){
  .rail-cta::after{animation:none}
  *{transition:none!important}
}

/* ============ 移动顶栏与抽屉 ============ */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:56px;z-index:70;
  background:#fff;border-bottom:1px solid var(--line);
  align-items:center;justify-content:space-between;padding:0 16px;
  transition:box-shadow .2s ease;
}
.topbar.is-scrolled{box-shadow:var(--sh-1)}
.topbar-logo{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:700;color:var(--jade-900)}
.topbar-logo i{
  width:22px;height:22px;border-radius:7px;background:var(--grad);
  display:inline-block;position:relative;
}
.topbar-logo i::after{content:"";position:absolute;inset:6px;border-radius:50%;background:#4FE0B0}
.burger{width:40px;height:40px;border-radius:10px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;border:1px solid var(--line)}
.burger span{display:block;width:18px;height:1.8px;border-radius:2px;background:var(--ink)}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:286px;max-width:86vw;z-index:90;
  background:#fff;transform:translateX(102%);transition:transform .3s ease;
  padding:20px 18px 28px;display:flex;flex-direction:column;gap:6px;
  box-shadow:var(--sh-3);
}
.drawer.is-open{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.drawer-head b{font-size:15px;color:var(--jade-900)}
.drawer-close{width:34px;height:34px;border-radius:10px;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--ink-2)}
.drawer a.drawer-link{
  display:flex;align-items:center;gap:10px;padding:12px 12px;border-radius:12px;
  font-size:15px;color:var(--ink);transition:background .2s ease;
}
.drawer a.drawer-link:hover{background:var(--mint)}
.drawer a.drawer-link.is-active{background:var(--mint);color:var(--jade-900);font-weight:600}
.drawer a.drawer-link i{width:6px;height:6px;border-radius:50%;background:var(--jade-600);flex:0 0 auto}
.drawer-cta{
  margin-top:auto;display:flex;align-items:center;justify-content:center;gap:8px;
  height:46px;border-radius:var(--r-btn);background:var(--amber);color:#fff;font-size:15px;font-weight:600;
}
.scrim{
  position:fixed;inset:0;background:rgba(21,32,28,.5);z-index:80;
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;
}
.scrim.is-open{opacity:1;visibility:visible}

/* ============ 布局 ============ */
.page{margin-left:var(--rail)}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}
.sec{margin-top:88px}
.sec-head{max-width:760px;margin-bottom:28px}
.sec-head h2{font-size:28px;line-height:1.25;font-weight:700;letter-spacing:-.2px}
.sec-head p{margin-top:12px;color:var(--ink-2);font-size:15.5px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:600;
  color:var(--jade-900);background:var(--mint);border:1px solid #CBEAdd;
  padding:5px 12px;border-radius:var(--r-btn);letter-spacing:.3px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--jade-600)}

/* ============ Hero ============ */
.cat-hero{
  margin-top:28px;border-radius:var(--r-hero);overflow:hidden;position:relative;
  background-image:linear-gradient(135deg,rgba(15,91,78,.94) 0%,rgba(23,166,124,.86) 58%,rgba(79,224,176,.72) 100%),url(/assets/images/backpic/back-2.webp);
  background-size:cover;background-position:center;
  color:#fff;padding:52px 48px 48px;box-shadow:var(--sh-2);
}
.cat-hero .tagline{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:600;
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.32);
  padding:5px 12px;border-radius:var(--r-btn);
}
.cat-hero h1{
  font-size:44px;line-height:1.22;font-weight:700;margin-top:18px;
  max-width:820px;letter-spacing:-.6px;
}
.cat-hero .sub{margin-top:14px;font-size:17px;color:rgba(255,255,255,.92);max-width:640px}
.cat-hero .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.cat-hero .hero-facts{
  display:flex;flex-wrap:wrap;gap:12px;margin-top:34px;
  border-top:1px solid rgba(255,255,255,.22);padding-top:22px;
}
.fact{min-width:150px}
.fact b{display:block;font-size:19px;font-weight:700;letter-spacing:-.2px}
.fact span{font-size:12px;color:rgba(255,255,255,.78)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;gap:8px;height:46px;padding:0 22px;
  border-radius:var(--r-btn);font-size:15px;font-weight:600;
  transition:transform .18s ease,filter .18s ease,box-shadow .18s ease,background .18s ease;
}
.btn svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.btn-primary{background:var(--amber);color:#fff;box-shadow:0 10px 24px rgba(255,138,61,.34)}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px);box-shadow:0 6px 14px rgba(255,138,61,.3)}
.btn-ghost{background:#fff;color:var(--jade-900);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--jade-300);background:#FAFDFB;transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-outline-light{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.5)}
.btn-outline-light:hover{background:rgba(255,255,255,.14);transform:translateY(-1px)}
.btn:disabled,.btn.is-disabled{opacity:.45;pointer-events:none}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--jade-600)}
.link-more::after{content:"→";transition:transform .2s ease}
.link-more:hover::after{transform:translateX(4px)}

/* ============ 筛选标签条（仅视觉） ============ */
.filter-bar{
  margin-top:32px;display:flex;flex-wrap:wrap;gap:10px;align-items:center;
  padding:14px 18px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh-1);
}
.filter-bar .fb-label{font-size:13px;color:var(--ink-2);font-weight:600;margin-right:4px}
.chip{
  font-size:13px;font-weight:500;color:var(--ink-2);
  border:1px solid var(--line);background:#fff;border-radius:var(--r-btn);
  padding:6px 14px;transition:.2s ease;
}
.chip:hover{border-color:var(--jade-300);color:var(--jade-900)}
.chip.is-on{background:var(--mint);border-color:#BFE6D6;color:var(--jade-900);font-weight:600}

/* ============ 适配大卡网格 ============ */
.adapt-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.adapt-card{
  position:relative;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
  display:flex;flex-direction:column;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.adapt-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:transparent;outline:1px solid var(--jade-300);outline-offset:-1px}
.adapt-card .thumb{position:relative;aspect-ratio:16/10;background:var(--mint)}
.adapt-card .thumb img{width:100%;height:100%}
.adapt-card .thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(15,91,78,.10),rgba(23,166,124,.08))}
.badge{
  position:absolute;top:14px;right:14px;z-index:2;
  font-size:12px;font-weight:600;padding:5px 12px;border-radius:var(--r-btn);
  background:rgba(255,255,255,.94);color:var(--jade-900);
  border:1px solid #CBEBDF;box-shadow:0 4px 12px rgba(21,32,28,.10);
  display:inline-flex;align-items:center;gap:6px;
}
.badge::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--jade-600)}
.badge.amber{color:#B4541B;border-color:#FFD9BE}
.badge.amber::before{background:var(--amber)}
.badge.gray{color:var(--ink-2);border-color:var(--line)}
.badge.gray::before{background:#A9B7B0}
.adapt-body{padding:24px;display:flex;flex-direction:column;gap:14px;flex:1}
.adapt-body h3{font-size:20px;line-height:1.35;font-weight:600}
.adapt-body p{font-size:15px;color:var(--ink-2)}
.adapt-body ul{font-size:14.5px;color:var(--ink-2);display:flex;flex-direction:column;gap:7px;padding-left:0;list-style:none}
.adapt-body ul li{position:relative;padding-left:18px;line-height:1.65}
.adapt-body ul li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:3px;
  background:var(--mint);border:1px solid var(--jade-300);
}
.adapt-body .card-foot{margin-top:auto;padding-top:6px;display:flex;align-items:center;justify-content:space-between;gap:12px;border-top:1px dashed var(--line)}
.adapt-body .card-foot small{font-size:12.5px;color:var(--ink-2)}

/* ============ 规格对照 ============ */
.spec-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.spec-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--sh-1);
}
.spec-card.recommend{border-top:3px solid var(--jade-600)}
.spec-card.minimum{border-top:3px solid #A9B7B0}
.spec-card h3{font-size:20px;font-weight:600;display:flex;align-items:center;gap:10px}
.spec-card h3 em{
  font-style:normal;font-size:12px;font-weight:600;padding:3px 10px;border-radius:var(--r-btn);
  background:var(--mint);color:var(--jade-900);
}
.spec-card.minimum h3 em{background:#F1F4F2;color:var(--ink-2)}
.spec-list{margin-top:18px;display:flex;flex-direction:column}
.spec-list .row{
  display:flex;justify-content:space-between;gap:16px;padding:12px 0;
  border-bottom:1px dashed var(--line);font-size:14.5px;
}
.spec-list .row:last-child{border-bottom:0}
.spec-list dt{color:var(--ink-2);flex:0 0 auto}
.spec-list dd{text-align:right;font-weight:600;color:var(--ink)}

/* ============ 步骤 ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.step{
  position:relative;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);padding:26px 22px;box-shadow:var(--sh-1);
  transition:transform .22s ease,box-shadow .22s ease;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.step .num{
  width:34px;height:34px;border-radius:11px;background:var(--grad);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;
  margin-bottom:14px;
}
.step h4{font-size:17px;font-weight:600;line-height:1.4}
.step p{margin-top:8px;font-size:14.5px;color:var(--ink-2)}
.step .hint{display:block;margin-top:12px;font-size:12.5px;color:var(--jade-600);font-weight:600}

/* ============ 适用场景 ============ */
.scene-list{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.scene{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);transition:transform .22s ease,box-shadow .22s ease;
}
.scene:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.scene .ico{
  width:40px;height:40px;border-radius:12px;background:var(--mint);
  display:flex;align-items:center;justify-content:center;margin-bottom:14px;
}
.scene .ico svg{width:20px;height:20px;fill:none;stroke:var(--jade-900);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.scene h4{font-size:17px;font-weight:600}
.scene p{margin-top:8px;font-size:14.5px;color:var(--ink-2)}

/* ============ 提示条 ============ */
.notice{
  margin-top:24px;display:flex;gap:14px;align-items:flex-start;
  background:var(--mint);border:1px solid #CBEBDF;border-left:4px solid var(--jade-600);
  border-radius:var(--r-sm);padding:18px 20px;
}
.notice svg{width:20px;height:20px;flex:0 0 auto;margin-top:3px;fill:none;stroke:var(--jade-900);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.notice p{font-size:14.5px;color:#1E453A}

/* ============ FAQ ============ */
.faq{display:flex;flex-direction:column;gap:14px}
.faq details{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:0 24px;box-shadow:var(--sh-1);overflow:hidden;transition:box-shadow .2s ease,border-color .2s ease;
}
.faq details[open]{box-shadow:var(--sh-2);border-color:#D6EBE1}
.faq summary{
  list-style:none;cursor:pointer;padding:20px 0;font-size:16.5px;font-weight:600;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  position:relative;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"";width:10px;height:10px;flex:0 0 auto;
  border-right:2px solid var(--ink-2);border-bottom:2px solid var(--ink-2);
  transform:rotate(45deg);transition:transform .22s ease;
}
.faq details[open] summary::after{transform:rotate(-135deg);border-color:var(--jade-600)}
.faq details[open] summary{color:var(--jade-900)}
.faq .faq-body{
  padding:0 0 22px;border-top:1px solid var(--line);padding-top:18px;
  font-size:15px;color:var(--ink-2);
}
.faq details summary{position:relative}
.faq details[open] summary::before{
  content:"";position:absolute;left:-24px;top:14px;bottom:14px;width:3px;border-radius:3px;background:var(--amber);
}

/* ============ CTA 横条 ============ */
.cta-band{
  margin-top:88px;border-radius:var(--r-hero);padding:44px 48px;
  background:var(--grad);color:#fff;box-shadow:var(--sh-2);
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band h2{font-size:28px;line-height:1.3;font-weight:700}
.cta-band p{margin-top:10px;font-size:15.5px;color:rgba(255,255,255,.9);max-width:560px}
.cta-band .cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ============ 页脚 ============ */
.footer{
  margin-top:88px;background:#101B17;color:#C9D6D1;position:relative;
  padding:64px 0 26px;
}
.footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px}
.footer-brand-mark{
  display:flex;align-items:center;gap:10px;color:#fff;font-size:16px;font-weight:700;
}
.footer-brand-mark i{
  width:26px;height:26px;border-radius:8px;background:var(--grad);display:inline-block;position:relative;
}
.footer-brand-mark i::after{content:"";position:absolute;inset:7px;border-radius:50%;background:#4FE0B0}
.footer p{margin-top:14px;font-size:14px;color:#94A8A1;line-height:1.8;max-width:340px}
.footer h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:14px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a,.footer-links span{font-size:14px;color:#A8BBB4;transition:color .2s ease,transform .2s ease}
.footer-links a:hover{color:#4FE0B0;transform:translateX(3px)}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.10);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:#7E928B;
}
.to-top{
  position:fixed;right:22px;bottom:26px;width:44px;height:44px;border-radius:50%;
  background:#fff;border:1px solid var(--line);box-shadow:var(--sh-1);
  display:flex;align-items:center;justify-content:center;z-index:50;
  opacity:0;visibility:hidden;transition:.25s ease;
}
.to-top.is-show{opacity:1;visibility:visible}
.to-top svg{width:18px;height:18px;fill:none;stroke:var(--jade-900);stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.to-top:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .cat-hero{padding:44px 36px 40px}
  .cat-hero h1{font-size:37px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .scene-list{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:1023px){
  .rail-nav,.rail-brand,.rail-cta{display:none}
  .topbar{display:flex}
  .page{margin-left:0;padding-top:56px}
  .sec{margin-top:64px}
  .cta-band{margin-top:64px}
  .footer{margin-top:64px}
  .container{padding:0 24px}
}
@media (max-width:767px){
  body{font-size:15.5px}
  .container{padding:0 16px}
  .sec{margin-top:48px}
  .cat-hero{margin-top:16px;border-radius:22px;padding:32px 22px 30px}
  .cat-hero h1{font-size:26px;line-height:1.32;margin-top:14px}
  .cat-hero .sub{font-size:15px}
  .cat-hero .hero-actions{gap:10px;margin-top:24px}
  .cat-hero .hero-facts{gap:18px;margin-top:26px}
  .fact{min-width:calc(50% - 9px)}
  .btn{height:44px;padding:0 18px;font-size:14.5px;flex:1 1 auto;justify-content:center}
  .sec-head h2{font-size:22px}
  .adapt-grid{grid-template-columns:1fr}
  .spec-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .scene-list{grid-template-columns:1fr}
  .filter-bar{padding:12px;gap:8px}
  .cta-band{margin-top:48px;border-radius:22px;padding:30px 22px}
  .cta-band h2{font-size:22px}
  .cta-band .cta-actions{width:100%}
  .footer{margin-top:48px;padding:44px 0 22px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;gap:8px}
  .to-top{right:14px;bottom:16px}
}
@media (max-width:480px){
  .cat-hero h1{font-size:23px}
  .chip{font-size:12.5px;padding:5px 11px}
  .spec-card{padding:22px}
  .spec-list .row{font-size:14px}
}

/* roulang page: category3 */
:root{
  --jade-900:#0F5B4E;
  --jade-700:#12876A;
  --jade-600:#17A67C;
  --mint:#4FE0B0;
  --amber:#FF8A3D;
  --ink:#15201C;
  --sub:#5C6B65;
  --line:#E4EBE7;
  --bg:#F4F7F5;
  --card:#FFFFFF;
  --tint:#E8F7F1;
  --grad:linear-gradient(135deg,#0F5B4E 0%,#17A67C 58%,#4FE0B0 100%);
  --sh-1:0 8px 24px rgba(21,32,28,.06);
  --sh-2:0 16px 40px rgba(21,32,28,.10);
  --sh-3:0 24px 60px rgba(21,32,28,.14);
  --r-s:10px;
  --r-m:14px;
  --r-l:20px;
  --r-xl:28px;
  --sp:8px;
  --rail-w:92px;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;object-fit:cover}
a{color:var(--jade-600);text-decoration:none}
a:hover{color:var(--jade-900)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--jade-600);outline-offset:2px;border-radius:6px}

.container{
  width:min(1180px,100% - 48px);
  margin-inline:auto;
}

/* ============ 左侧竖向导航 ============ */
.rail{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--rail-w);
  background:var(--grad);
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:24px;
  padding:22px 8px 18px;
  z-index:70;
}
.rail-logo{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:8px;
  color:#fff;
  text-decoration:none;
}
.rail-logo-mark{
  width:42px;height:42px;
  display:grid;place-items:center;
  border-radius:13px;
  background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.38);
  font-size:15px;
  font-weight:700;
  letter-spacing:.5px;
  color:#fff;
}
.rail-logo-text{
  font-size:11px;
  font-weight:600;
  letter-spacing:.5px;
  color:rgba(255,255,255,.92);
  white-space:nowrap;
}
.rail-nav{
  display:flex;
  flex-direction:column;
  gap:6px;
  width:100%;
}
.rail-link{
  position:relative;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:5px;
  padding:11px 4px;
  border-radius:12px;
  color:rgba(255,255,255,.8);
  font-size:10px;
  font-weight:500;
  text-align:center;
  transition:background .2s ease,color .2s ease,transform .2s ease;
}
.rail-link svg{
  width:22px;height:22px;
  fill:none;
  stroke:currentColor;
  stroke-width:1.6;
  stroke-linecap:round;
  stroke-linejoin:round;
}
.rail-link:hover{background:rgba(255,255,255,.13);color:#fff}
.rail-link.is-active{background:rgba(255,255,255,.18);color:#fff}
.rail-link.is-active::before{
  content:"";
  position:absolute;
  left:-8px;top:50%;
  transform:translateY(-50%);
  width:3px;height:26px;
  border-radius:3px;
  background:var(--amber);
}
.rail-tip{
  position:absolute;
  left:calc(100% + 12px);
  top:50%;
  transform:translate(-6px,-50%);
  background:rgba(15,91,78,.96);
  color:#fff;
  font-size:12px;
  padding:6px 10px;
  border-radius:8px;
  white-space:nowrap;
  opacity:0;
  pointer-events:none;
  transition:opacity .18s ease,transform .18s ease;
  z-index:5;
}
.rail-link:hover .rail-tip{opacity:1;transform:translate(0,-50%)}
.rail-dl{
  margin-top:auto;
  width:52px;height:52px;
  display:grid;place-items:center;
  border-radius:50%;
  background:var(--amber);
  color:#26150a;
  box-shadow:0 10px 24px rgba(255,138,61,.36);
  animation:railPulse 2s ease-in-out infinite;
}
.rail-dl svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.rail-dl:hover{filter:brightness(1.06);color:#26150a}
@keyframes railPulse{
  0%,100%{box-shadow:0 10px 24px rgba(255,138,61,.36)}
  50%{box-shadow:0 10px 30px rgba(255,138,61,.62)}
}
.rail-toggle{
  display:none;
  width:42px;height:42px;
  border:1px solid rgba(255,255,255,.45);
  border-radius:12px;
  background:rgba(255,255,255,.12);
  color:#fff;
  cursor:pointer;
  padding:0;
  place-items:center;
}
.rail-toggle svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round}
.drawer-mask{
  position:fixed;
  inset:0;
  background:rgba(21,32,28,.5);
  opacity:0;
  visibility:hidden;
  transition:opacity .25s ease,visibility .25s ease;
  z-index:65;
}
.drawer-mask.is-open{opacity:1;visibility:visible}

/* ============ 面包屑 ============ */
.crumb{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  align-items:center;
  font-size:13px;
  color:var(--sub);
  padding:26px 0 0;
}
.crumb a{color:var(--sub)}
.crumb a:hover{color:var(--jade-900)}
.crumb .sep{color:#a9b6b1}

/* ============ Hero ============ */
.hero{
  margin-top:20px;
  border-radius:var(--r-xl);
  overflow:hidden;
  position:relative;
  background-image:linear-gradient(135deg,rgba(15,91,78,.94) 0%,rgba(23,166,124,.86) 62%,rgba(79,224,176,.72) 100%),url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  box-shadow:var(--sh-3);
}
.hero-inner{
  display:grid;
  grid-template-columns:1.06fr .94fr;
  gap:40px;
  align-items:center;
  padding:56px;
}
.hero-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border-radius:999px;
  background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.36);
  color:#fff;
  font-size:13px;
  font-weight:500;
  margin-bottom:20px;
}
.hero-tag i{width:7px;height:7px;border-radius:50%;background:var(--amber);display:inline-block}
.hero h1{
  font-size:40px;
  line-height:1.22;
  color:#fff;
  letter-spacing:.4px;
}
.hero-sub{
  margin-top:16px;
  font-size:19px;
  font-weight:600;
  color:var(--mint);
}
.hero-text{
  margin-top:18px;
  font-size:15px;
  line-height:1.8;
  color:rgba(255,255,255,.86);
  max-width:560px;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:28px;
}
.hero-media{
  position:relative;
  border-radius:var(--r-xl);
  overflow:hidden;
  box-shadow:0 26px 60px rgba(6,42,34,.4);
  border:1px solid rgba(255,255,255,.24);
  background:linear-gradient(135deg,rgba(255,255,255,.06),rgba(79,224,176,.12));
}
.hero-media img{
  width:100%;
  aspect-ratio:16/10;
  height:auto;
}
.hero-stats{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:12px;
  padding:0 56px 44px;
}
.stat{
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.3);
  border-radius:var(--r-m);
  padding:14px 16px;
  color:#fff;
}
.stat b{
  display:block;
  font-size:18px;
  font-weight:700;
  letter-spacing:.2px;
  line-height:1.4;
}
.stat span{
  display:block;
  margin-top:4px;
  font-size:12px;
  color:rgba(255,255,255,.78);
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:13px 26px;
  border-radius:999px;
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,filter .18s ease,background .18s ease;
}
.btn svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.btn-primary{
  background:var(--amber);
  color:#26150a;
  box-shadow:0 10px 24px rgba(255,138,61,.34);
}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px);color:#26150a}
.btn-primary:active{transform:translateY(1px);box-shadow:0 6px 16px rgba(255,138,61,.3)}
.btn-ghost{
  background:rgba(255,255,255,.14);
  border-color:rgba(255,255,255,.5);
  color:#fff;
}
.btn-ghost:hover{background:rgba(255,255,255,.24);color:#fff;transform:translateY(-1px)}
.btn-outline{
  background:#fff;
  border-color:var(--line);
  color:var(--jade-900);
}
.btn-outline:hover{border-color:var(--jade-600);color:var(--jade-900);transform:translateY(-1px);box-shadow:var(--sh-1)}

/* ============ 区块 ============ */
.section{margin-top:88px}
.section-head{max-width:760px}
.section-head h2{
  font-size:28px;
  letter-spacing:.3px;
}
.section-head p{
  margin-top:12px;
  color:var(--sub);
  font-size:15px;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  font-weight:600;
  letter-spacing:1px;
  color:var(--jade-600);
  text-transform:uppercase;
  margin-bottom:12px;
}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--grad)}

/* ============ 现象分类卡 ============ */
.issue-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
  margin-top:36px;
}
.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-l);
  box-shadow:var(--sh-1);
  overflow:hidden;
  transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#cfe9df}
.card-media{position:relative}
.card-media img{width:100%;aspect-ratio:16/10;height:auto}
.card-tag{
  position:absolute;
  left:14px;top:14px;
  padding:5px 12px;
  border-radius:999px;
  background:rgba(255,255,255,.92);
  color:var(--jade-900);
  font-size:12px;
  font-weight:600;
  box-shadow:0 4px 12px rgba(21,32,28,.12);
}
.card-body{padding:24px}
.card-body h3{font-size:18px;font-weight:600}
.card-body p{margin-top:10px;font-size:14px;color:var(--sub);line-height:1.7}
.card-list{margin-top:16px;display:grid;gap:8px}
.card-list li{
  position:relative;
  padding-left:18px;
  font-size:14px;
  color:var(--ink);
}
.card-list li::before{
  content:"";
  position:absolute;
  left:0;top:10px;
  width:7px;height:7px;
  border-radius:2px;
  background:var(--grad);
}

/* ============ 时间轴 ============ */
.timeline{
  margin-top:40px;
  display:grid;
  gap:18px;
}
.tl-item{
  position:relative;
  display:grid;
  grid-template-columns:72px 1fr;
  gap:22px;
  align-items:start;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-l);
  padding:26px 28px;
  box-shadow:var(--sh-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.tl-item:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:#cfe9df}
.tl-item:not(:last-child)::after{
  content:"";
  position:absolute;
  left:61px;
  top:100%;
  width:2px;
  height:18px;
  background:linear-gradient(#17A67C,#4FE0B0);
  opacity:.55;
}
.tl-num{
  width:52px;height:52px;
  display:grid;place-items:center;
  border-radius:16px;
  background:var(--tint);
  border:1px solid #c6ead9;
  color:var(--jade-900);
  font-size:18px;
  font-weight:700;
  letter-spacing:.5px;
}
.tl-body h3{font-size:20px}
.tl-body p{margin-top:10px;font-size:15px;color:var(--sub);line-height:1.75}
.tl-meta{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:14px;
}
.tag{
  display:inline-flex;
  align-items:center;
  padding:4px 11px;
  border-radius:999px;
  background:var(--tint);
  color:var(--jade-900);
  font-size:12px;
  font-weight:500;
}
.tag--line{
  background:#fff;
  border:1px solid var(--line);
  color:var(--sub);
}

/* ============ 规格对照 ============ */
.spec-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
  margin-top:36px;
}
.spec-card{
  position:relative;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-l);
  padding:30px;
  box-shadow:var(--sh-1);
  overflow:hidden;
}
.spec-card::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:5px;
  background:var(--grad);
}
.spec-card h3{font-size:20px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.spec-card .spec-note{margin-top:8px;font-size:13px;color:var(--sub)}
.spec-list{margin:22px 0 0;display:grid;gap:0}
.spec-row{
  display:grid;
  grid-template-columns:112px 1fr;
  gap:16px;
  padding:13px 0;
  border-bottom:1px dashed var(--line);
}
.spec-row:last-child{border-bottom:0}
.spec-row dt{font-size:13px;color:var(--sub);font-weight:500}
.spec-row dd{margin:0;font-size:14px;color:var(--ink);font-weight:500}

/* ============ 线索清单 ============ */
.clue-wrap{
  margin-top:36px;
  background:linear-gradient(135deg,#0F5B4E 0%,#17A67C 100%);
  border-radius:var(--r-xl);
  padding:44px;
  color:#fff;
  box-shadow:var(--sh-3);
}
.clue-wrap h2{font-size:26px;color:#fff}
.clue-wrap .clue-lead{margin-top:12px;font-size:15px;color:rgba(255,255,255,.84);max-width:720px}
.clue-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:16px;
  margin-top:28px;
}
.clue{
  background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.26);
  border-radius:var(--r-m);
  padding:18px 20px;
  transition:background .2s ease,transform .2s ease;
}
.clue:hover{background:rgba(255,255,255,.2);transform:translateY(-3px)}
.clue h4{font-size:15px;font-weight:600;color:#fff}
.clue p{margin-top:6px;font-size:13px;color:rgba(255,255,255,.8);line-height:1.7}

/* ============ FAQ ============ */
.faq-list{margin-top:32px}
.faq-item{
  position:relative;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-m);
  margin-bottom:14px;
  overflow:hidden;
  transition:border-color .22s ease,box-shadow .22s ease;
}
.faq-item::before{
  content:"";
  position:absolute;
  left:0;top:0;bottom:0;
  width:3px;
  background:var(--line);
  transition:background .22s ease;
}
.faq-item[open]{border-color:#c6ead9;box-shadow:var(--sh-1)}
.faq-item[open]::before{background:var(--amber)}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  padding:20px 24px 20px 28px;
  font-size:16px;
  font-weight:600;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  transition:color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--jade-900)}
.faq-item summary .faq-icon{
  flex:none;
  width:26px;height:26px;
  border-radius:50%;
  border:1px solid var(--line);
  display:grid;place-items:center;
  transition:transform .22s ease,background .22s ease,border-color .22s ease;
}
.faq-item summary .faq-icon svg{width:14px;height:14px;fill:none;stroke:var(--jade-900);stroke-width:2;stroke-linecap:round}
.faq-item[open] summary .faq-icon{transform:rotate(180deg);background:var(--tint);border-color:#c6ead9}
.faq-body{
  padding:0 28px 22px;
  font-size:15px;
  color:var(--sub);
  line-height:1.8;
}

/* ============ CTA ============ */
.cta{
  margin-top:88px;
  background:var(--grad);
  border-radius:var(--r-xl);
  padding:46px 48px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  color:#fff;
  box-shadow:var(--sh-3);
}
.cta h2{font-size:26px;color:#fff}
.cta p{margin-top:10px;font-size:15px;color:rgba(255,255,255,.86);max-width:620px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}
.cta .btn-outline{background:#fff;color:var(--jade-900);border-color:transparent}

/* ============ 页脚 ============ */
.footer{
  margin-top:88px;
  background:#0E1F1A;
  color:rgba(255,255,255,.72);
  border-top:3px solid transparent;
  background-image:linear-gradient(#0E1F1A,#0E1F1A),var(--grad);
  background-origin:border-box;
  background-clip:padding-box,border-box;
  padding:64px 0 26px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.1fr;
  gap:36px;
}
.footer-brand-mark{
  display:flex;
  align-items:center;
  gap:10px;
  color:#fff;
  font-size:17px;
  font-weight:700;
  letter-spacing:.4px;
}
.footer-brand-mark i{
  width:10px;height:10px;
  border-radius:3px;
  background:var(--grad);
  display:inline-block;
}
.footer p{
  margin-top:14px;
  font-size:14px;
  line-height:1.8;
  color:rgba(255,255,255,.66);
  max-width:340px;
}
.footer h4{
  font-size:15px;
  color:#fff;
  font-weight:600;
  margin-bottom:16px;
}
.footer-links{display:grid;gap:11px}
.footer-links a,.footer-links span{
  font-size:14px;
  color:rgba(255,255,255,.68);
  transition:color .18s ease,transform .18s ease;
  display:inline-block;
}
.footer-links a:hover{color:var(--mint);transform:translateX(3px)}
.footer-bottom{
  margin-top:44px;
  padding-top:20px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:space-between;
  font-size:13px;
  color:rgba(255,255,255,.52);
}

/* ============ 桌面内边距 ============ */
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
}

/* ============ 平板与移动 ============ */
@media (max-width:1023px){
  body{padding-top:56px}
  .rail{
    top:0;left:0;right:0;bottom:auto;
    width:100%;
    height:56px;
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    padding:0 14px;
    box-shadow:0 1px 0 rgba(255,255,255,.14);
  }
  .rail-logo{flex-direction:row;gap:9px}
  .rail-logo-mark{width:30px;height:30px;border-radius:9px;font-size:12px}
  .rail-logo-text{font-size:14px}
  .rail-toggle{display:grid}
  .rail-dl{
    display:none;
  }
  .rail-nav{
    position:fixed;
    top:0;right:0;
    height:100vh;
    width:min(288px,84vw);
    background:linear-gradient(160deg,#0F5B4E,#17A67C);
    padding:78px 16px 26px;
    gap:6px;
    overflow-y:auto;
    transform:translateX(102%);
    transition:transform .3s cubic-bezier(.4,0,.2,1);
    box-shadow:-20px 0 50px rgba(6,42,34,.28);
    z-index:80;
  }
  .rail-nav.is-open{transform:translateX(0)}
  .rail-link{
    flex-direction:row;
    justify-content:flex-start;
    gap:12px;
    font-size:15px;
    padding:14px 14px;
    border-radius:12px;
    text-align:left;
  }
  .rail-link svg{width:20px;height:20px}
  .rail-link.is-active::before{left:0;height:22px;width:3px}
  .rail-link.is-active{background:rgba(255,255,255,.2)}
  .rail-tip{display:none}
  .rail-link--dl{background:var(--amber);color:#26150a;font-weight:600;margin-top:14px;justify-content:center}
  .rail-link--dl:hover{background:var(--amber);color:#26150a;filter:brightness(1.06)}
  .hero-inner{grid-template-columns:1fr;padding:40px 32px}
  .hero h1{font-size:32px}
  .hero-stats{padding:0 32px 34px;grid-template-columns:repeat(2,minmax(0,1fr))}
  .section{margin-top:64px}
  .issue-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .clue-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .clue-wrap{padding:34px}
  .cta{padding:36px;flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}

@media (min-width:1024px){
  .rail-link--dl{display:none}
}

@media (max-width:767px){
  .container{width:min(1180px,100% - 32px)}
  .crumb{padding-top:20px}
  .hero-inner{padding:30px 20px}
  .hero h1{font-size:27px}
  .hero-sub{font-size:17px}
  .hero-stats{padding:0 20px 26px;grid-template-columns:1fr 1fr;gap:10px}
  .stat b{font-size:15px}
  .section{margin-top:48px}
  .section-head h2{font-size:23px}
  .issue-grid,.spec-grid,.clue-grid{grid-template-columns:1fr}
  .tl-item{grid-template-columns:1fr;gap:14px;padding:22px}
  .tl-item:not(:last-child)::after{display:none}
  .clue-wrap{padding:26px 20px}
  .clue-wrap h2{font-size:22px}
  .faq-item summary{padding:16px 18px 16px 20px;font-size:15px}
  .faq-body{padding:0 20px 18px;font-size:14px}
  .cta{padding:28px 22px;margin-top:56px}
  .cta h2{font-size:21px}
  .footer{padding:48px 0 22px;margin-top:56px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:8px}
  .spec-card{padding:24px 20px}
  .spec-row{grid-template-columns:96px 1fr;gap:12px}
}

@media (max-width:480px){
  .hero h1{font-size:24px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{justify-content:center}
  .hero-stats{grid-template-columns:1fr}
  .tl-num{width:46px;height:46px;font-size:16px;border-radius:14px}
}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
}