/* roulang page: index */
/* ================= 设计令牌 ================= */
:root{
  --brand:#12A594;
  --brand-deep:#0B7C70;
  --brand-soft:#E6F5F2;
  --brand-12:rgba(18,165,148,.12);
  --accent:#FF6B35;
  --violet:#6B4EF2;
  --bg:#F7F5F1;
  --surface:#FFFFFF;
  --ink-block:#14181D;
  --ink:#15181C;
  --ink-2:#4A5259;
  --ink-3:#7C848C;
  --line:#E4E0D8;
  --success:#17A673;
  --warn:#E8A13A;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:24px;
  --sh-1:0 1px 2px rgba(21,24,28,.05);
  --sh-2:0 10px 28px rgba(21,24,28,.10);
  --sidebar-w:248px;
  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ================= 基础重置 ================= */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","MiSans","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:17px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;letter-spacing:-0.01em}
h1{font-size:48px}
h2{font-size:32px}
h3{font-size:22px;font-weight:600}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
table{border-collapse:collapse;width:100%}
::selection{background:var(--brand-12);color:var(--brand-deep)}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

/* 滚动条 */
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:#D6D1C7;border-radius:999px;border:3px solid var(--bg)}
::-webkit-scrollbar-thumb:hover{background:#BFB9AD}

/* ================= 侧边栏 App Shell ================= */
.app-sidebar{
  position:fixed;top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  background:var(--surface);
  border-right:1px solid var(--line);
  z-index:60;
  display:flex;flex-direction:column;
  padding:22px 16px 20px;
  overflow-y:auto;
  transition:transform .26s var(--ease);
}
.sidebar-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:24px}
.brand{display:flex;align-items:center;gap:10px;min-width:0}
.brand-mark{
  flex:0 0 auto;width:36px;height:36px;border-radius:10px;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  color:#fff;font-size:18px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 12px rgba(11,124,112,.28);
}
.brand-text{
  font-size:15px;font-weight:700;line-height:1.25;color:var(--ink);
  letter-spacing:0;word-break:keep-all;
}
.sidebar-close{
  display:none;flex:0 0 auto;width:36px;height:36px;border:1px solid var(--line);
  background:var(--surface);border-radius:var(--r-sm);cursor:pointer;
  align-items:center;justify-content:center;color:var(--ink-2);
  transition:all .2s var(--ease);
}
.sidebar-close:hover{border-color:var(--brand);color:var(--brand-deep);background:var(--brand-soft)}
.sidebar-close svg{width:18px;height:18px}

.side-nav{display:flex;flex-direction:column;gap:6px}
.side-link{
  position:relative;display:flex;align-items:center;gap:12px;
  height:44px;padding:0 12px;border-radius:var(--r-md);
  font-size:15px;font-weight:500;color:var(--ink-2);
  transition:background .2s var(--ease),color .2s var(--ease);
}
.side-link svg{width:18px;height:18px;flex:0 0 auto}
.side-link .side-label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.side-link:hover{background:var(--brand-soft);color:var(--brand-deep)}
.side-link.active{background:var(--brand-12);color:var(--brand-deep);font-weight:600}
.side-link.active::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:22px;border-radius:0 3px 3px 0;background:var(--brand);
}
.side-divider{height:1px;background:var(--line);margin:20px 0}
.side-cta{margin-top:auto;padding-top:16px}
.side-note{margin:10px 0 0;font-size:12.5px;line-height:1.6;color:var(--ink-3)}

/* ================= 主区域 ================= */
.app-main{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}

.mobile-topbar{
  display:none;align-items:center;gap:12px;
  position:sticky;top:0;z-index:40;height:56px;padding:0 16px;
  background:rgba(255,255,255,.94);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.menu-toggle{
  width:38px;height:38px;border:1px solid var(--line);background:var(--surface);
  border-radius:var(--r-sm);display:flex;align-items:center;justify-content:center;
  cursor:pointer;color:var(--ink-2);transition:all .2s var(--ease);
}
.menu-toggle:hover{border-color:var(--brand);color:var(--brand-deep)}
.menu-toggle svg{width:20px;height:20px}
.mobile-brand{font-size:15px;font-weight:700}

.topbar{
  position:sticky;top:0;z-index:38;
  background:rgba(247,245,241,.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.topbar-inner{
  max-width:1240px;margin:0 auto;padding:0 32px;
  height:60px;display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.crumbs{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-3)}
.crumb-current{color:var(--ink);font-weight:600}
.search-box{
  display:flex;align-items:center;gap:8px;
  height:40px;padding:0 14px;min-width:260px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-12)}
.search-ico{width:17px;height:17px;color:var(--ink-3);flex:0 0 auto}
.search-box input{
  border:0;background:transparent;outline:none;width:100%;
  font-size:14.5px;color:var(--ink);
}
.search-box input::placeholder{color:var(--ink-3)}

/* ================= 通用区块 ================= */
.section{padding:96px 0}
.section-soft{background:var(--brand-soft)}
.section-head{max-width:760px;margin-bottom:48px}
.section-head--row{
  max-width:none;display:flex;align-items:flex-end;justify-content:space-between;gap:32px;
}
.kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--brand-deep);text-transform:uppercase;margin-bottom:14px;
}
.kicker::before{content:"";width:12px;height:3px;border-radius:2px;background:var(--brand)}
.section-head h2{margin-bottom:14px}
.section-desc{color:var(--ink-2);font-size:16.5px;margin:0;max-width:680px}

.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--brand-deep);
  border-bottom:1px solid rgba(11,124,112,.35);
  padding-bottom:2px;text-underline-offset:3px;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.text-link:hover{color:var(--accent);border-color:rgba(255,107,53,.5)}
.text-link::after{content:"→";font-size:14px}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-md);
  font-size:15px;font-weight:600;border:1px solid transparent;
  cursor:pointer;white-space:nowrap;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 2px 8px rgba(11,124,112,.22)}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-deep);background:var(--brand-soft);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-block{width:100%}

/* ================= Hero ================= */
.hero-band{position:relative;overflow:hidden}
.hero-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(21,24,28,.055) 1px,transparent 1px);
  background-size:22px 22px;
  -webkit-mask-image:linear-gradient(180deg,#000 0%,transparent 78%);
  mask-image:linear-gradient(180deg,#000 0%,transparent 78%);
}
.hero{position:relative;padding:64px 0 90px}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;border-radius:999px;
  background:var(--surface);border:1px solid var(--line);
  font-size:13px;font-weight:600;color:var(--ink-2);margin-bottom:22px;
}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 4px var(--brand-12)}
.hero h1{font-size:48px;margin-bottom:20px}
.hero-sub{font-size:17.5px;color:var(--ink-2);max-width:560px;margin-bottom:32px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:48px}
.hero-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:32px;margin:0;padding-top:32px;border-top:1px solid var(--line)}
.hero-stats>div{margin:0}
.hero-stats dt{font-size:13px;color:var(--ink-3);margin-bottom:4px}
.hero-stats dd{margin:0;font-size:30px;font-weight:700;color:var(--brand-deep);letter-spacing:-0.01em;line-height:1.2}
.hero-stats dd small{font-size:14px;font-weight:600;color:var(--ink-3);margin-left:4px}

.hero-visual{position:relative}
.hero-shot{
  border-radius:var(--r-xl);overflow:hidden;background:var(--surface);
  border:1px solid var(--line);box-shadow:0 18px 48px rgba(21,24,28,.10);
}
.hero-shot img{width:100%;aspect-ratio:16/9;object-fit:cover}
.hero-float{
  position:absolute;left:-24px;bottom:-28px;
  display:flex;align-items:center;gap:12px;
  padding:12px 16px 12px 12px;max-width:280px;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(12px);
  border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-2);
}
.hero-float img{width:64px;height:40px;object-fit:cover;border-radius:8px;flex:0 0 auto}
.hero-float strong{display:block;font-size:14px;color:var(--ink)}
.hero-float span{display:block;font-size:12.5px;color:var(--ink-3);line-height:1.5}

/* ================= 功能分组 ================= */
.feature-list{display:flex;flex-direction:column}
.feature-row{
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
  padding:48px 0;border-top:1px solid var(--line);
}
.feature-row:first-child{border-top:0;padding-top:0}
.feature-row:nth-child(even) .feature-media{order:2}
.feature-media img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  border-radius:var(--r-lg);border:1px solid var(--line);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.feature-row:hover .feature-media img{transform:translateY(-3px);box-shadow:var(--sh-2)}
.feature-num{
  display:inline-block;font-size:14px;font-weight:700;letter-spacing:.08em;
  color:var(--brand);border:1px solid var(--brand-12);
  background:var(--brand-soft);border-radius:999px;padding:3px 12px;margin-bottom:16px;
}
.feature-body h3{margin-bottom:12px;font-size:24px}
.feature-body p{color:var(--ink-2);margin-bottom:18px}
.tick-list{display:flex;flex-direction:column;gap:10px;margin-bottom:20px}
.tick-list li{position:relative;padding-left:20px;font-size:15.5px;color:var(--ink-2);line-height:1.7}
.tick-list li::before{
  content:"";position:absolute;left:0;top:11px;
  width:8px;height:8px;border-radius:2px;background:var(--brand);
}

/* ================= 使用场景 ================= */
.tab-bar{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:32px}
.tab-btn{
  height:42px;padding:0 20px;border-radius:999px;
  background:var(--surface);border:1px solid var(--line);
  font-size:14.5px;font-weight:600;color:var(--ink-2);cursor:pointer;
  transition:all .22s var(--ease);
}
.tab-btn:hover{border-color:var(--brand);color:var(--brand-deep)}
.tab-btn.active{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 4px 14px rgba(11,124,112,.24)}
.tab-btn:active{transform:translateY(1px)}
.is-hidden{display:none !important}
.scene-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.scene-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.scene-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:#D6EDE9}
.scene-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.scene-body{padding:20px;display:flex;flex-direction:column;gap:12px;flex:1}
.scene-body h3{font-size:19px}
.scene-audience{font-size:13.5px;color:var(--brand-deep);font-weight:600}
.step-list{display:flex;flex-direction:column;gap:8px;margin-top:auto}
.step-list li{display:flex;gap:10px;font-size:14.5px;color:var(--ink-2);line-height:1.65}
.step-list .sn{
  flex:0 0 auto;width:20px;height:20px;margin-top:3px;border-radius:50%;
  background:var(--brand-soft);color:var(--brand-deep);
  font-size:11.5px;font-weight:700;display:flex;align-items:center;justify-content:center;
}

/* ================= 成功案例 ================= */
.case-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.case-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px;display:flex;flex-direction:column;gap:14px;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease);
}
.case-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.case-num{
  font-size:38px;font-weight:700;color:var(--brand);line-height:1;
  letter-spacing:-0.02em;
}
.case-card h3{font-size:19px}
.case-card p{color:var(--ink-2);font-size:15.5px;margin:0}
.case-card img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  border-radius:var(--r-md);border:1px solid var(--line);margin-top:4px;
}
.source-tag{font-size:13px;color:var(--ink-3);border-top:1px dashed var(--line);padding-top:12px}

/* ================= 价格 ================= */
.plan-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;align-items:stretch}
.plan{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:32px 28px;display:flex;flex-direction:column;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.plan:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.plan.featured{border:1.5px solid var(--brand);box-shadow:0 14px 36px rgba(11,124,112,.12)}
.plan-badge{
  position:absolute;top:-13px;left:28px;
  background:var(--accent);color:#fff;font-size:12.5px;font-weight:700;
  padding:4px 12px;border-radius:999px;letter-spacing:.02em;
}
.plan-name{font-size:17px;font-weight:700;margin-bottom:6px}
.plan-price{display:flex;align-items:baseline;gap:6px;margin-bottom:6px}
.plan-price .num{font-size:40px;font-weight:700;color:var(--ink);letter-spacing:-0.02em;line-height:1}
.plan-price .unit{font-size:14px;color:var(--ink-3)}
.plan-cycle{font-size:13.5px;color:var(--ink-3);margin-bottom:22px}
.plan-feats{display:flex;flex-direction:column;gap:11px;margin-bottom:28px;padding-top:22px;border-top:1px solid var(--line)}
.plan-feats li{position:relative;padding-left:26px;font-size:15px;color:var(--ink-2);line-height:1.65}
.plan-feats li::before{
  content:"";position:absolute;left:0;top:7px;width:16px;height:16px;border-radius:50%;
  background:var(--brand-soft);
}
.plan-feats li::after{
  content:"";position:absolute;left:5px;top:11px;width:6px;height:3px;
  border-left:1.6px solid var(--brand-deep);border-bottom:1.6px solid var(--brand-deep);
  transform:rotate(-45deg);
}
.plan .btn{margin-top:auto}

/* ================= 最新信息 ================= */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.news-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;transition:transform .24s var(--ease),box-shadow .24s var(--ease);
}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.news-card-link{display:flex;flex-direction:column;height:100%}
.news-cover{background:linear-gradient(135deg,var(--brand) 0%,var(--brand-deep) 100%)}
.news-cover img{width:100%;aspect-ratio:16/9;object-fit:cover}
.news-body{padding:20px;display:flex;flex-direction:column;gap:12px;flex:1}
.tag{
  align-self:flex-start;font-size:12px;font-weight:600;
  color:var(--brand-deep);background:var(--brand-soft);
  padding:4px 10px;border-radius:999px;
}
.news-title{
  font-size:17.5px;font-weight:600;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-summary{
  font-size:14.5px;color:var(--ink-2);line-height:1.7;margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  gap:12px;padding-top:14px;border-top:1px solid var(--line);
  font-size:13px;color:var(--ink-3);
}
.read-more{font-weight:600;color:var(--brand-deep)}
.news-card:hover .read-more{color:var(--accent)}

.empty-state{
  min-height:160px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:14px;padding:40px 24px;text-align:center;
  background:var(--surface);border:1px dashed var(--line);border-radius:var(--r-lg);
}
.empty-state svg{width:32px;height:32px;color:var(--ink-3)}
.empty-state p{color:var(--ink-3);font-size:15px;margin:0}

/* ================= 联系 / CTA ================= */
.contact-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-xl);
  padding:48px;display:grid;grid-template-columns:1fr 1.15fr;gap:48px;align-items:start;
  box-shadow:var(--sh-1);
}
.contact-head h2{font-size:28px;margin-bottom:14px}
.contact-head p{color:var(--ink-2);font-size:15.5px;margin:0}
.contact-form{display:flex;flex-direction:column;gap:18px}
.field{display:flex;flex-direction:column;gap:8px}
.field label{font-size:13.5px;font-weight:600;color:var(--ink-2)}
.field input,.field textarea{
  width:100%;padding:14px 16px;border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--bg);font-size:15px;outline:none;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
}
.field textarea{min-height:112px;resize:vertical;line-height:1.7}
.field input:focus,.field textarea:focus{
  border-color:var(--brand);background:var(--surface);box-shadow:0 0 0 3px var(--brand-12);
}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-3)}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}

.cta-band{
  background:var(--ink-block);color:#fff;border-radius:var(--r-xl);
  padding:56px;display:flex;align-items:center;justify-content:space-between;
  gap:40px;position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-80px;top:-80px;width:280px;height:280px;
  border-radius:50%;background:radial-gradient(circle,rgba(18,165,148,.35),transparent 68%);
}
.cta-band h2{font-size:30px;margin-bottom:12px;position:relative;z-index:1}
.cta-band p{color:#C9CFD4;font-size:15.5px;margin:0;max-width:560px;position:relative;z-index:1}
.cta-band .btn{position:relative;z-index:1;flex:0 0 auto}

/* ================= FAQ（内页复用样式） ================= */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;transition:border-color .2s var(--ease)}
.faq-item.open{border-color:var(--brand)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 20px;background:transparent;border:0;cursor:pointer;
  font-size:16px;font-weight:600;text-align:left;color:var(--ink);
  min-height:52px;transition:background .2s var(--ease);
}
.faq-q:hover{background:var(--brand-soft)}
.faq-sign{position:relative;flex:0 0 auto;width:18px;height:18px}
.faq-sign::before,.faq-sign::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
}
.faq-sign::before{left:0;top:8px;width:18px;height:2px}
.faq-sign::after{left:8px;top:0;width:2px;height:18px;transition:transform .22s var(--ease),opacity .22s var(--ease)}
.faq-item.open .faq-sign::after{transform:rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s var(--ease)}
.faq-a-inner{padding:0 20px 20px;color:var(--ink-2);font-size:15.5px;line-height:1.8}

/* ================= 页脚 ================= */
.site-footer{background:var(--ink-block);color:#C9CFD4;margin-top:auto;padding:72px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,.10)}
.footer-logo{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-logo span{font-size:15.5px;font-weight:700;color:#fff}
.footer-brand p{font-size:14.5px;line-height:1.8;color:#9AA3AA;max-width:320px;margin:0 0 20px}
.social-row{display:flex;gap:10px}
.social-row a{
  width:36px;height:36px;border-radius:var(--r-sm);
  border:1px solid rgba(255,255,255,.14);display:flex;align-items:center;justify-content:center;
  color:#C9CFD4;transition:all .2s var(--ease);
}
.social-row a:hover{background:var(--brand);border-color:var(--brand);color:#fff;transform:translateY(-2px)}
.social-row svg{width:17px;height:17px}
.footer-col h3{font-size:14px;font-weight:700;color:#fff;margin-bottom:18px;letter-spacing:.02em}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col a,.footer-col span{font-size:14.5px;color:#9AA3AA;transition:color .2s var(--ease)}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding-top:24px;font-size:13.5px;color:#7C848C;
}

/* ================= 遮罩 ================= */
.sidebar-backdrop{
  position:fixed;inset:0;background:rgba(20,24,29,.55);z-index:55;
  opacity:0;visibility:hidden;transition:opacity .24s var(--ease),visibility .24s var(--ease);
}
.sidebar-backdrop.show{opacity:1;visibility:visible}

/* ================= 响应式 ================= */
@media (min-width:1024px) and (max-width:1279px){
  :root{--sidebar-w:76px}
  .app-sidebar{padding:18px 10px;align-items:center}
  .sidebar-head{justify-content:center;margin-bottom:20px}
  .brand-text,.side-label,.side-note,.side-cta{display:none}
  .side-nav{width:100%}
  .side-link{justify-content:center;padding:0}
  .side-link.active::before{height:18px}
}

@media (max-width:1023px){
  :root{--sidebar-w:0px}
  h1{font-size:34px}
  .section{padding:72px 0}
  .container{padding:0 24px}
  .mobile-topbar{display:flex}
  .topbar{position:static}
  .topbar-inner{padding:0 24px;height:auto;min-height:56px;flex-wrap:wrap;padding-top:10px;padding-bottom:10px}
  .search-box{min-width:0;width:100%}
  .app-sidebar{
    width:280px;transform:translateX(-100%);
    box-shadow:0 0 44px rgba(20,24,29,.20);padding:20px 18px;
  }
  .app-sidebar.open{transform:translateX(0)}
  .sidebar-close{display:flex}
  .hero{padding:44px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero h1{font-size:34px}
  .hero-float{left:12px;bottom:-22px;max-width:250px}
  .feature-row{grid-template-columns:1fr;gap:28px;padding:36px 0}
  .feature-row:nth-child(even) .feature-media{order:0}
  .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .case-grid{grid-template-columns:1fr}
  .plan-grid{grid-template-columns:1fr;gap:20px}
  .contact-card{grid-template-columns:1fr;gap:32px;padding:32px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:40px 28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}

@media (max-width:639px){
  body{font-size:16px}
  h1{font-size:29px}
  h2{font-size:24px}
  h3{font-size:19px}
  .section{padding:56px 0}
  .container{padding:0 20px}
  .section-head{margin-bottom:32px}
  .section-head--row{flex-direction:column;align-items:flex-start;gap:16px}
  .hero h1{font-size:29px}
  .hero-sub{font-size:16px}
  .hero-actions{gap:10px;margin-bottom:32px}
  .hero-actions .btn{width:100%}
  .hero-stats{grid-template-columns:1fr 1fr;gap:20px;padding-top:24px}
  .hero-stats dd{font-size:24px}
  .hero-float{position:static;margin-top:16px;max-width:none;width:100%}
  .scene-grid,.news-grid{grid-template-columns:1fr}
  .tab-btn{height:38px;padding:0 15px;font-size:13.5px}
  .contact-card{padding:24px}
  .field-row{grid-template-columns:1fr}
  .cta-band{padding:32px 22px;border-radius:var(--r-lg)}
  .cta-band h2{font-size:24px}
  .cta-band .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}

/* roulang page: article */
:root{
  --brand:#12A594;
  --brand-deep:#0B7C70;
  --brand-soft:#E6F5F2;
  --brand-12:rgba(18,165,148,.12);
  --accent:#FF6B35;
  --violet:#6B4EF2;
  --bg:#F7F5F1;
  --surface:#FFFFFF;
  --ink-block:#14181D;
  --ink:#15181C;
  --ink-2:#4A5259;
  --ink-3:#7C848C;
  --line:#E4E0D8;
  --ok:#17A673;
  --warn:#E8A13A;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:24px;
  --sh-1:0 1px 2px rgba(21,24,28,.05);
  --sh-2:0 10px 28px rgba(21,24,28,.10);
  --t:200ms cubic-bezier(.2,.7,.3,1);
  --sidebar-w:248px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans SC","MiSans","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:17px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand-deep);text-decoration:none;transition:color var(--t)}
a:hover{color:var(--accent)}
button,input,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;letter-spacing:-.01em}
p{margin:0}
ul,ol{padding-left:1.25em}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
::selection{background:var(--brand-12);color:var(--brand-deep)}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:#D8D4CC;border-radius:99px;border:3px solid var(--bg)}
::-webkit-scrollbar-track{background:transparent}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}

/* ============ 左侧 App Shell ============ */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  background:var(--surface);
  border-right:1px solid var(--line);
  display:flex;flex-direction:column;
  padding:24px 16px;
  gap:24px;
  z-index:60;
  transition:transform var(--t),width var(--t);
}
.sidebar-head{padding:0}
.brand{display:flex;align-items:center;gap:12px;padding:8px;border-radius:var(--r-md)}
.brand:hover{background:var(--brand-soft)}
.brand-mark{
  width:36px;height:36px;flex:none;border-radius:10px;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  color:#fff;display:grid;place-items:center;
  font-weight:700;font-size:18px;letter-spacing:0;
}
.brand-text{display:flex;flex-direction:column;line-height:1.3;min-width:0}
.brand-text strong{font-size:15px;font-weight:700;color:var(--ink);white-space:nowrap}
.brand-text em{font-style:normal;font-size:12px;color:var(--ink-3);white-space:nowrap}
.side-nav{display:flex;flex-direction:column;gap:6px;flex:1;padding-top:8px;border-top:1px solid var(--line)}
.side-link{
  position:relative;display:flex;align-items:center;gap:10px;
  height:40px;padding:0 12px;border-radius:var(--r-md);
  color:var(--ink-2);font-size:15px;
  transition:background var(--t),color var(--t);
}
.side-link svg{width:18px;height:18px;flex:none}
.side-link:hover{background:var(--brand-soft);color:var(--brand-deep)}
.side-link.active{background:var(--brand-12);color:var(--brand-deep);font-weight:600}
.side-link.active::before{
  content:"";position:absolute;left:-16px;top:8px;bottom:8px;width:3px;
  border-radius:0 3px 3px 0;background:var(--brand);
}
.sidebar-foot{border-top:1px solid var(--line);padding-top:16px}
.side-cta{
  display:flex;align-items:center;justify-content:center;gap:8px;
  height:44px;border-radius:var(--r-md);
  background:var(--brand);color:#fff;font-size:15px;font-weight:600;
  transition:background var(--t),box-shadow var(--t);
}
.side-cta svg{width:18px;height:18px}
.side-cta:hover{background:var(--brand-deep);color:#fff;box-shadow:var(--sh-2)}
.side-cta:active{transform:translateY(1px)}
.side-note{margin-top:10px;font-size:12px;line-height:1.6;color:var(--ink-3)}

/* 抽屉遮罩 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,24,29,.55);
  z-index:55;opacity:0;pointer-events:none;transition:opacity var(--t);
}
.drawer-mask.is-open{opacity:1;pointer-events:auto}

/* ============ 主区域 ============ */
.main-wrap{
  margin-left:var(--sidebar-w);
  min-height:100vh;
  display:flex;flex-direction:column;
}
.topbar{
  position:sticky;top:0;z-index:40;height:60px;
  display:flex;align-items:center;gap:14px;
  padding:0 32px;
  background:rgba(247,245,241,.9);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.menu-toggle{
  display:none;width:40px;height:40px;flex:none;
  border:1px solid var(--line);background:var(--surface);border-radius:var(--r-md);
  align-items:center;justify-content:center;cursor:pointer;
  transition:border-color var(--t),color var(--t);
}
.menu-toggle svg{width:20px;height:20px}
.menu-toggle:hover{border-color:var(--brand);color:var(--brand-deep)}
.crumbs{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-3);min-width:0;white-space:nowrap;overflow:hidden}
.crumbs a{color:var(--ink-2)}
.crumbs a:hover{color:var(--brand-deep)}
.crumbs .sep{color:#C3BEB5}
.crumbs .current{color:var(--ink);font-weight:600;overflow:hidden;text-overflow:ellipsis;max-width:52vw}
.topbar-meta{margin-left:auto;font-size:13px;color:var(--ink-3);display:flex;align-items:center;gap:8px}
.state-dot{width:8px;height:8px;border-radius:99px;background:var(--ok);display:inline-block}

.page-main{flex:1;width:100%;max-width:1240px;margin:0 auto;padding:40px 32px 88px}

/* ============ 文章头部 ============ */
.article-head{max-width:880px}
.kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand-deep);
  background:var(--brand-soft);border-radius:999px;padding:6px 14px;
}
.kicker svg{width:14px;height:14px}
.article-title{font-size:44px;font-weight:700;line-height:1.28;margin:20px 0 18px}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;font-size:14px;color:var(--ink-3)}
.meta-row time,.meta-row span{display:inline-flex;align-items:center;gap:6px}
.meta-row .pill{
  background:var(--surface);border:1px solid var(--line);
  border-radius:999px;padding:4px 12px;color:var(--brand-deep);font-weight:600;font-size:13px;
}
.meta-sep{width:1px;height:14px;background:var(--line)}
.hr-line{border:0;height:1px;background:var(--line);margin:28px 0 36px}

/* ============ 文章卡片与阅读区 ============ */
.article-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-xl);
  box-shadow:var(--sh-1);
  padding:40px 40px 44px;
}
.article-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:48px}
.article-body{min-width:0;font-size:17px;line-height:1.85;color:#242A30}
.article-body p{margin:0 0 1em}
.article-body h2{
  font-size:28px;line-height:1.35;font-weight:700;
  margin:44px 0 16px;padding-left:14px;border-left:4px solid var(--brand);
}
.article-body h3{font-size:21px;font-weight:600;margin:32px 0 12px}
.article-body h4{font-size:18px;font-weight:600;margin:24px 0 10px}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:1.35em}
.article-body li{margin-bottom:.5em;line-height:1.78}
.article-body strong{font-weight:700;color:var(--ink)}
.article-body a{color:var(--brand-deep);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--accent)}
.article-body img{border-radius:var(--r-md);margin:24px auto;height:auto}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;
  background:var(--brand-soft);border-left:3px solid var(--brand);
  border-radius:0 var(--r-md) var(--r-md) 0;color:var(--ink-2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body table{
  width:100%;display:block;overflow-x:auto;
  border-collapse:collapse;margin:24px 0;font-size:15px;
  border:1px solid var(--line);border-radius:var(--r-md);
}
.article-body th{
  background:var(--brand-soft);color:var(--brand-deep);
  text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);white-space:nowrap;font-weight:600;
}
.article-body td{padding:12px 14px;border-bottom:1px solid var(--line);line-height:1.7}
.article-body tbody tr:nth-child(even){background:#FBFAF7}
.article-body pre{
  background:var(--ink-block);color:#E7ECEF;
  padding:18px 20px;border-radius:var(--r-md);
  overflow-x:auto;font-size:14px;line-height:1.7;margin:24px 0;
}
.article-body code{
  background:#EFEDE7;border-radius:6px;padding:2px 6px;font-size:.92em;
}
.article-body pre code{background:none;padding:0;color:inherit}
.article-body hr{border:0;height:1px;background:var(--line);margin:32px 0}

/* 空态 */
.empty-state{
  display:flex;flex-direction:column;align-items:center;gap:12px;
  padding:64px 24px;text-align:center;
  background:#FCFBF8;border:1px dashed var(--line);border-radius:var(--r-lg);
  color:var(--ink-3);
}
.empty-state svg{width:32px;height:32px;color:var(--ink-3)}
.empty-state h2{border:0;padding:0;margin:0;font-size:20px;color:var(--ink);font-weight:600}
.empty-state p{font-size:15px;line-height:1.8;max-width:420px;margin:0}

/* ============ 目录 ============ */
.toc{display:none}
.toc-card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:16px 18px;box-shadow:var(--sh-1);
}
.toc-title{
  font-size:12px;letter-spacing:.1em;color:var(--ink-3);
  font-weight:600;margin:0 0 10px;text-transform:uppercase;
}
.toc-card a{
  display:block;font-size:14px;line-height:1.6;color:var(--ink-2);
  padding:6px 0 6px 12px;border-left:2px solid transparent;
  transition:color var(--t),border-color var(--t);
}
.toc-card a:hover{color:var(--brand-deep);border-left-color:var(--brand)}

/* ============ 文章底部 ============ */
.article-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:40px;padding-top:28px;border-top:1px solid var(--line)}
.band-title{font-size:22px;font-weight:700;margin:0 0 18px}
.band-title span{display:block;font-size:14px;font-weight:400;color:var(--ink-3);margin-top:6px}
.related-band{margin-top:56px}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.related-card{
  display:flex;gap:12px;align-items:center;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:12px;
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.related-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--brand)}
.related-card img{width:96px;height:64px;object-fit:cover;border-radius:10px;flex:none}
.related-info{display:flex;flex-direction:column;gap:6px;min-width:0}
.related-info strong{
  font-size:15px;font-weight:600;color:var(--ink);line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.related-card:hover .related-info strong{color:var(--brand-deep)}
.related-info time{font-size:12px;color:var(--ink-3)}

/* ============ CTA 条 ============ */
.cta-band{
  margin-top:56px;border-radius:var(--r-xl);padding:40px;
  background:linear-gradient(135deg,#0B7C70 0%,#12A594 60%,#2AB9A6 100%);
  color:#fff;display:flex;flex-wrap:wrap;gap:28px;align-items:center;justify-content:space-between;
  box-shadow:0 18px 40px rgba(11,124,112,.18);
}
.cta-band h2{font-size:26px;font-weight:700;margin:0 0 10px;color:#fff}
.cta-band p{margin:0;font-size:15px;line-height:1.8;color:rgba(255,255,255,.86);max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-md);
  font-size:15px;font-weight:600;border:1.5px solid transparent;
  cursor:pointer;transition:background var(--t),color var(--t),border-color var(--t),box-shadow var(--t),transform var(--t);
}
.btn svg{width:16px;height:16px}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-deep);color:#fff;box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{background:var(--surface);border-color:var(--line);color:var(--ink)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand-deep)}
.btn-outline:active{transform:translateY(1px)}
.btn-light{background:#fff;color:var(--brand-deep)}
.btn-light:hover{background:#F2FBF9;color:var(--brand-deep);box-shadow:var(--sh-2)}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.6);color:#fff}
.btn-outline-light:hover{background:rgba(255,255,255,.14);color:#fff}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--ink-block);color:#C9CFD4;
  padding:56px 0 28px;font-size:14px;margin-top:auto;
}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand p{margin:16px 0 0;line-height:1.8;color:#9AA3AA;max-width:340px;font-size:14px}
.footer-logo{display:inline-flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:16px}
.footer-logo:hover{color:#fff}
.footer-logo .brand-mark{width:32px;height:32px;font-size:16px;border-radius:9px}
.footer-col h3{font-size:14px;font-weight:600;color:#fff;margin:0 0 14px}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.footer-col a{color:#C9CFD4}
.footer-col a:hover{color:var(--brand)}
.footer-col span{color:#9AA3AA}
.social-row{display:flex;gap:10px;margin-top:18px}
.social-row a{
  width:36px;height:36px;border-radius:10px;background:rgba(255,255,255,.06);
  display:grid;place-items:center;color:#C9CFD4;
  transition:background var(--t),color var(--t);
}
.social-row a:hover{background:var(--brand);color:#fff}
.social-row svg{width:18px;height:18px}
.footer-bottom{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;
  margin-top:40px;padding-top:20px;font-size:13px;color:#8E979E;
  border-top:1px solid rgba(255,255,255,.1);
}

/* ============ 断点 ============ */
@media (max-width:1279px){
  .main-wrap{margin-left:76px}
  .sidebar{width:76px;padding:20px 12px}
  .sidebar-head{padding:0}
  .brand{padding:0;justify-content:center}
  .brand-text{display:none}
  .side-nav{padding-top:12px}
  .side-link{justify-content:center;padding:0}
  .side-link.active::before{left:-12px}
  .side-link .side-label{
    position:absolute;left:58px;top:50%;transform:translateY(-50%) translateX(-4px);
    background:var(--ink-block);color:#fff;font-size:13px;line-height:1;
    padding:8px 10px;border-radius:8px;white-space:nowrap;
    opacity:0;pointer-events:none;transition:opacity var(--t),transform var(--t);z-index:70;
  }
  .side-link:hover .side-label{opacity:1;transform:translateY(-50%) translateX(0)}
  .sidebar-foot{width:100%}
  .side-cta{padding:0}
  .side-cta span{display:none}
  .side-note{display:none}
}
@media (max-width:1023px){
  .main-wrap{margin-left:0}
  .sidebar{
    width:280px;padding:24px 16px;
    transform:translateX(-100%);
    box-shadow:var(--sh-2);
  }
  .sidebar.is-open{transform:translateX(0)}
  .sidebar-head{padding:0}
  .brand{padding:8px;justify-content:flex-start}
  .brand-text{display:flex}
  .side-nav{padding-top:8px}
  .side-link{justify-content:flex-start;padding:0 12px}
  .side-link .side-label{
    position:static;transform:none;opacity:1;background:none;color:inherit;
    padding:0;border-radius:0;font-size:15px;pointer-events:auto;
  }
  .side-link.active::before{left:-16px}
  .side-cta{padding:0 16px}
  .side-cta span{display:inline}
  .side-note{display:block}
  .menu-toggle{display:inline-flex}
  .topbar{height:56px;padding:0 20px}
  .crumbs .current{max-width:42vw}
  .topbar-meta{display:none}
  .page-main{padding:28px 20px 64px}
  .container{padding:0 20px}
  .article-card{padding:26px 20px 30px;border-radius:var(--r-lg)}
  .article-title{font-size:32px}
  .article-body h2{font-size:24px}
  .article-body h3{font-size:19px}
  .related-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-band{padding:28px}
  .cta-band h2{font-size:22px}
}
@media (max-width:639px){
  body{font-size:16px}
  .article-title{font-size:27px}
  .page-main{padding:20px 16px 56px}
  .container{padding:0 16px}
  .crumbs{font-size:13px}
  .crumbs .current{max-width:48vw}
  .article-card{padding:20px 16px 24px}
  .article-body{font-size:16px}
  .article-body h2{font-size:21px;padding-left:12px;border-left-width:3px}
  .meta-row{font-size:13px;gap:8px 12px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px}
  .cta-band{padding:24px 20px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1}
  .related-card img{width:80px;height:56px}
}
@media (min-width:1280px){
  .article-grid{grid-template-columns:minmax(0,760px) 200px;gap:48px}
  .toc.is-ready{display:block;align-self:start}
  .toc-card{position:sticky;top:88px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
}

/* roulang page: category1 */
:root{
    --brand:#12A594;
    --brand-deep:#0B7C70;
    --brand-soft:#E6F5F2;
    --brand-12:rgba(18,165,148,.12);
    --accent:#FF6B35;
    --violet:#6B4EF2;
    --bg:#F7F5F1;
    --surface:#FFFFFF;
    --ink-block:#14181D;
    --ink:#15181C;
    --ink-2:#4A5259;
    --ink-3:#7C848C;
    --line:#E4E0D8;
    --ok:#17A673;
    --warn:#E8A13A;
    --danger:#D9534F;
    --r-sm:8px;
    --r-md:12px;
    --r-lg:16px;
    --r-xl:24px;
    --shadow-1:0 1px 2px rgba(21,24,28,.05);
    --shadow-2:0 10px 28px rgba(21,24,28,.10);
    --ease:cubic-bezier(.2,.7,.3,1);
    --sidebar-w:248px;
    --bar-h:60px;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    font-family:"PingFang SC","HarmonyOS Sans SC","MiSans","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
    font-size:17px;
    line-height:1.8;
    color:var(--ink);
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  h1,h2,h3,h4,p,figure,ul,ol,dl,dd{margin:0}
  ul,ol{padding:0;list-style:none}
  a{color:inherit;text-decoration:none}
  img{display:block;max-width:100%;height:auto}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
  table{border-collapse:collapse}
  :focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
  ::selection{background:var(--brand);color:#fff}
  ::-webkit-scrollbar{width:10px;height:10px}
  ::-webkit-scrollbar-track{background:transparent}
  ::-webkit-scrollbar-thumb{background:#D7D2C8;border-radius:999px;border:2px solid var(--bg)}
  ::-webkit-scrollbar-thumb:hover{background:#BFB9AE}
  .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

  .container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}

  /* ============ shell ============ */
  .main-area{
    margin-left:var(--sidebar-w);
    min-height:100vh;
    display:flex;
    flex-direction:column;
    transition:margin-left .24s var(--ease);
  }

  /* ============ sidebar ============ */
  .sidebar{
    position:fixed;
    top:0;left:0;bottom:0;
    width:var(--sidebar-w);
    background:var(--surface);
    border-right:1px solid var(--line);
    display:flex;
    flex-direction:column;
    padding:22px 14px 18px;
    z-index:80;
    transition:width .24s var(--ease),transform .24s var(--ease);
    overflow-y:auto;
  }
  .side-brand{
    display:flex;align-items:center;gap:10px;
    padding:0 6px 18px;
    border-bottom:1px solid var(--line);
    margin-bottom:16px;
  }
  .brand-mark{
    flex:none;width:36px;height:36px;border-radius:10px;
    background:linear-gradient(135deg,var(--brand),var(--brand-deep));
    color:#fff;font-size:18px;font-weight:700;
    display:flex;align-items:center;justify-content:center;
    box-shadow:0 6px 16px rgba(18,165,148,.28);
    letter-spacing:0;
  }
  .side-brand-text{display:flex;flex-direction:column;min-width:0}
  .side-brand-text strong{
    font-size:15px;line-height:1.35;font-weight:700;letter-spacing:-.01em;
    white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  }
  .side-brand-text em{font-size:12px;font-style:normal;color:var(--ink-3);line-height:1.5}

  .side-nav{display:flex;flex-direction:column;gap:4px}
  .side-link{
    position:relative;
    display:flex;align-items:center;gap:10px;
    height:40px;padding:0 12px;border-radius:12px;
    color:var(--ink-2);font-size:15px;
    transition:background .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);
  }
  .side-link svg{width:18px;height:18px;flex:none}
  .side-link:hover{background:var(--brand-soft);color:var(--brand-deep)}
  .side-link.active{
    background:var(--brand-12);
    color:var(--brand-deep);
    font-weight:600;
    box-shadow:inset 3px 0 0 var(--brand);
  }
  .side-label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

  .side-foot{margin-top:auto;padding-top:16px;border-top:1px solid var(--line)}
  .side-cta{
    display:flex;align-items:center;justify-content:center;
    height:44px;border-radius:12px;
    background:var(--brand);color:#fff;
    font-size:15px;font-weight:600;
    transition:background .2s var(--ease),transform .2s var(--ease);
  }
  .side-cta:hover{background:var(--brand-deep)}
  .side-cta:active{transform:translateY(1px)}
  .side-note{margin-top:10px;font-size:12px;line-height:1.65;color:var(--ink-3)}

  /* ============ mobile bar ============ */
  .mobile-bar{
    display:none;
    position:fixed;top:0;left:0;right:0;height:56px;z-index:70;
    background:rgba(255,255,255,.95);
    backdrop-filter:blur(12px);
    border-bottom:1px solid var(--line);
    align-items:center;justify-content:space-between;
    padding:0 16px;gap:12px;
  }
  .mobile-bar .mb-left{display:flex;align-items:center;gap:10px;min-width:0}
  .mobile-bar .brand-mark{width:32px;height:32px;font-size:16px;border-radius:9px}
  .mobile-bar strong{font-size:14px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .menu-btn{
    width:40px;height:40px;flex:none;border-radius:12px;
    border:1px solid var(--line);background:var(--surface);
    display:flex;align-items:center;justify-content:center;
    transition:border-color .2s var(--ease),background .2s var(--ease);
  }
  .menu-btn:hover{border-color:var(--brand);background:var(--brand-soft)}
  .menu-btn svg{width:18px;height:18px}

  .backdrop{
    position:fixed;inset:0;z-index:75;
    background:rgba(20,24,29,.55);
    opacity:0;visibility:hidden;
    transition:opacity .24s var(--ease),visibility .24s var(--ease);
  }
  .backdrop.show{opacity:1;visibility:visible}
  body.nav-open{overflow:hidden}

  /* ============ topbar ============ */
  .topbar{
    position:sticky;top:0;z-index:40;
    height:var(--bar-h);
    background:rgba(247,245,241,.9);
    backdrop-filter:blur(12px);
    border-bottom:1px solid var(--line);
  }
  .topbar-inner{display:flex;align-items:center;gap:16px;height:100%}
  .crumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-3);min-width:0}
  .crumb a{color:var(--ink-2);transition:color .2s var(--ease)}
  .crumb a:hover{color:var(--brand-deep)}
  .crumb .sep{color:var(--ink-3);opacity:.6}
  .crumb .cur{
    color:var(--ink);font-weight:600;
    white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  }
  .search-box{
    margin-left:auto;display:flex;align-items:center;gap:8px;
    height:40px;padding:0 14px;
    border:1px solid var(--line);border-radius:12px;
    background:var(--surface);
    transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
  }
  .search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-12)}
  .search-box svg{width:16px;height:16px;color:var(--ink-3);flex:none}
  .search-box input{
    border:0;background:transparent;outline:none;
    font-size:15px;width:170px;color:var(--ink);
  }
  .search-box input::placeholder{color:var(--ink-3)}

  /* ============ hero ============ */
  .page-hero{padding:56px 0 48px}
  .hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    height:30px;padding:0 14px;border-radius:999px;
    background:var(--brand-soft);color:var(--brand-deep);
    font-size:13px;font-weight:600;letter-spacing:.02em;
  }
  .eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand)}
  .page-title{margin-top:20px;font-weight:700;letter-spacing:-.02em;line-height:1.25}
  .page-title .h1-main{display:block;font-size:clamp(28px,3.4vw,44px)}
  .page-title .h1-sub{
    display:block;margin-top:6px;
    font-size:clamp(24px,2.8vw,36px);
    color:var(--brand-deep);
    font-weight:700;
  }
  .page-lead{margin-top:20px;max-width:640px;color:var(--ink-2);font-size:17px;line-height:1.85}
  .hero-facts{display:flex;gap:40px;margin-top:32px;flex-wrap:wrap}
  .hero-facts li{display:flex;flex-direction:column;gap:2px}
  .hero-facts strong{
    font-size:28px;font-weight:700;color:var(--brand);
    letter-spacing:-.01em;line-height:1.2;
    font-variant-numeric:tabular-nums;
  }
  .hero-facts span{font-size:12px;color:var(--ink-3);letter-spacing:.02em}

  .hero-media{
    position:relative;
    border-radius:var(--r-xl);
    overflow:hidden;
    border:1px solid var(--line);
    background:linear-gradient(135deg,#E6F5F2,#F7F5F1);
    aspect-ratio:4/3;
    box-shadow:var(--shadow-1);
  }
  .hero-media img{width:100%;height:100%;object-fit:cover}
  .hero-media-tag{
    position:absolute;left:16px;bottom:16px;
    display:inline-flex;align-items:center;gap:8px;
    height:36px;padding:0 14px;border-radius:999px;
    background:rgba(255,255,255,.92);
    backdrop-filter:blur(8px);
    color:var(--brand-deep);font-size:13px;font-weight:600;
    box-shadow:var(--shadow-1);
  }
  .hero-media-tag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent)}

  /* ============ toc ============ */
  .toc-bar{
    position:sticky;top:var(--bar-h);z-index:30;
    background:rgba(247,245,241,.95);
    backdrop-filter:blur(12px);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    padding:12px 0;
  }
  .toc-inner{display:flex;align-items:center;gap:16px}
  .toc-label{
    display:inline-flex;align-items:center;gap:6px;
    font-size:13px;font-weight:700;color:var(--brand-deep);
    white-space:nowrap;
  }
  .toc-label svg{width:14px;height:14px}
  .toc-links{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;padding:2px 0}
  .toc-links::-webkit-scrollbar{display:none}
  .toc-links a{
    flex:none;font-size:14px;color:var(--ink-2);
    padding:6px 14px;border-radius:999px;
    border:1px solid transparent;
    transition:background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
  }
  .toc-links a:hover{background:var(--surface);border-color:var(--line);color:var(--brand-deep)}

  /* ============ feature groups ============ */
  .feature-group{
    padding:48px 0;
    border-bottom:1px solid var(--line);
    scroll-margin-top:140px;
  }
  .feature-group:last-of-type{border-bottom:0}
  .fg-head{display:flex;align-items:baseline;gap:16px;flex-wrap:wrap}
  .fg-num{
    font-size:14px;font-weight:700;color:var(--brand);
    letter-spacing:.08em;font-variant-numeric:tabular-nums;
  }
  .fg-head h2{font-size:clamp(22px,2.4vw,30px);line-height:1.3;font-weight:700;letter-spacing:-.01em}
  .fg-desc{margin-top:12px;max-width:780px;color:var(--ink-2);font-size:16px;line-height:1.85}
  .fg-list{
    margin-top:24px;
    display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
  }
  .fg-list li{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    padding:20px;
    transition:border-color .22s var(--ease),box-shadow .22s var(--ease),transform .22s var(--ease);
  }
  .fg-list li:hover{
    border-color:var(--brand);
    box-shadow:var(--shadow-2);
    transform:translateY(-2px);
  }
  .fg-list strong{
    position:relative;display:block;
    padding-left:16px;margin-bottom:8px;
    font-size:16px;font-weight:600;line-height:1.5;
  }
  .fg-list strong::before{
    content:"";position:absolute;left:0;top:8px;
    width:8px;height:8px;border-radius:2px;background:var(--brand);
  }
  .fg-list span{display:block;font-size:14px;line-height:1.75;color:var(--ink-2)}

  .text-link{
    display:inline-flex;align-items:center;gap:6px;
    margin-top:20px;font-size:15px;font-weight:600;
    color:var(--brand-deep);
    border-bottom:1px solid rgba(11,124,112,.3);
    padding-bottom:2px;
    transition:color .2s var(--ease),border-color .2s var(--ease);
  }
  .text-link:hover{color:var(--accent);border-color:var(--accent)}

  /* ============ section heads ============ */
  .section{padding:72px 0}
  .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:28px;flex-wrap:wrap}
  .section-head h2{
    position:relative;padding-top:16px;
    font-size:clamp(22px,2.4vw,30px);line-height:1.3;font-weight:700;letter-spacing:-.01em;
  }
  .section-head h2::before{
    content:"";position:absolute;top:0;left:0;
    width:12px;height:3px;border-radius:2px;background:var(--brand);
  }
  .section-sub{margin-top:10px;color:var(--ink-2);font-size:15px;max-width:720px}

  /* ============ compare table ============ */
  .table-wrap{
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    background:var(--surface);
    overflow-x:auto;
    box-shadow:var(--shadow-1);
  }
  .compare-table{width:100%;min-width:760px;font-size:15px}
  .compare-table th,.compare-table td{
    padding:14px 18px;text-align:left;
    border-bottom:1px solid var(--line);
    line-height:1.65;
  }
  .compare-table thead th{
    background:rgba(18,165,148,.08);
    font-weight:600;color:var(--ink);
    white-space:nowrap;
  }
  .compare-table tbody th{
    background:var(--brand-soft);
    color:var(--brand-deep);
    font-weight:600;width:180px;white-space:nowrap;
  }
  .compare-table tbody tr:nth-child(even) td{background:#FCFBF9}
  .compare-table tbody tr:hover td{background:var(--brand-soft)}
  .compare-table tbody tr:last-child th,
  .compare-table tbody tr:last-child td{border-bottom:0}

  /* ============ faq ============ */
  .faq-list{display:grid;gap:12px;max-width:920px}
  .faq-item{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-md);
    overflow:hidden;
    transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
  }
  .faq-item:hover{border-color:#CFC9BE}
  .faq-item[open]{border-color:var(--brand);box-shadow:var(--shadow-1)}
  .faq-item summary{
    list-style:none;cursor:pointer;
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:16px 20px;min-height:52px;
    font-size:16px;font-weight:600;
    transition:background .2s var(--ease);
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-item summary:hover{background:var(--brand-soft)}
  .faq-mark{
    flex:none;width:24px;height:24px;border-radius:50%;
    background:var(--brand-soft);color:var(--brand-deep);
    display:flex;align-items:center;justify-content:center;
    font-size:16px;line-height:1;font-weight:600;
    transition:transform .24s var(--ease),background .24s var(--ease),color .24s var(--ease);
  }
  .faq-item[open] .faq-mark{transform:rotate(45deg);background:var(--brand);color:#fff}
  .faq-body{padding:0 20px 18px;font-size:15px;line-height:1.85;color:var(--ink-2)}

  /* ============ cta ============ */
  .cta-section{padding:8px 0 88px}
  .cta-panel{
    position:relative;overflow:hidden;
    border-radius:var(--r-xl);
    background:linear-gradient(135deg,#12A594 0%,#0B7C70 100%);
    padding:56px;
    color:#fff;
    display:grid;grid-template-columns:1.4fr auto;gap:32px;align-items:center;
  }
  .cta-panel::after{
    content:"";position:absolute;right:-60px;top:-60px;
    width:260px;height:260px;border-radius:50%;
    background:rgba(255,255,255,.08);
    pointer-events:none;
  }
  .cta-panel h2{font-size:clamp(22px,2.6vw,30px);line-height:1.3;font-weight:700;color:#fff}
  .cta-panel p{margin-top:12px;color:rgba(255,255,255,.88);font-size:16px;line-height:1.85;max-width:640px}
  .cta-actions{display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:1}

  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 24px;border-radius:12px;
    font-size:15px;font-weight:600;
    border:1px solid transparent;white-space:nowrap;
    transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .16s var(--ease);
  }
  .btn:active{transform:translateY(1px)}
  .btn-light{background:#fff;color:var(--brand-deep)}
  .btn-light:hover{background:#EFFBF8}
  .btn-outline-light{border-color:rgba(255,255,255,.55);color:#fff}
  .btn-outline-light:hover{background:rgba(255,255,255,.14);border-color:#fff}
  .btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line)}
  .btn-ghost:hover{border-color:var(--brand);color:var(--brand-deep)}
  .btn-primary{background:var(--brand);color:#fff}
  .btn-primary:hover{background:var(--brand-deep)}

  /* ============ footer ============ */
  .site-footer{background:var(--ink-block);color:#C9CFD4;padding:64px 0 0;margin-top:auto}
  .footer-grid{
    display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;
    gap:40px;padding-bottom:48px;
  }
  .footer-logo{
    display:inline-flex;align-items:center;gap:10px;
    color:#fff;font-weight:700;font-size:16px;
  }
  .footer-logo .brand-mark{width:34px;height:34px;font-size:16px;border-radius:9px}
  .footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:#9AA3AB;max-width:330px}
  .social-row{display:flex;gap:10px;margin-top:18px}
  .social-row a{
    width:36px;height:36px;border-radius:10px;
    border:1px solid rgba(255,255,255,.14);
    display:flex;align-items:center;justify-content:center;
    color:#C9CFD4;
    transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
  }
  .social-row a:hover{color:#fff;border-color:var(--brand);background:rgba(18,165,148,.18)}
  .social-row svg{width:18px;height:18px}
  .footer-col h3{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;letter-spacing:.02em}
  .footer-col ul{display:grid;gap:10px}
  .footer-col a,.footer-col span{font-size:14px;color:#9AA3AB;line-height:1.65;transition:color .2s var(--ease)}
  .footer-col a:hover{color:var(--brand)}
  .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:#7D868E;
  }

  /* ============ breakpoints ============ */
  @media (min-width:1024px) and (max-width:1279px){
    :root{--sidebar-w:76px}
    .side-brand{justify-content:center;padding:0 0 18px}
    .side-brand-text{display:none}
    .side-link{justify-content:center;padding:0}
    .side-label{display:none}
    .side-foot{padding-top:14px}
    .side-cta{padding:0;font-size:0}
    .side-cta::before{content:"疑问";font-size:13px}
    .side-note{display:none}
    .fg-list{grid-template-columns:repeat(2,1fr)}
  }

  @media (max-width:1023px){
    :root{--sidebar-w:0px}
    .mobile-bar{display:flex}
    .sidebar{
      width:280px;
      transform:translateX(-100%);
      box-shadow:var(--shadow-2);
      z-index:90;
    }
    .sidebar.open{transform:translateX(0)}
    .main-area{margin-left:0;padding-top:56px}
    .topbar{position:static;height:auto}
    .topbar-inner{height:auto;padding-top:14px;padding-bottom:14px}
    .toc-bar{top:56px}
    .page-hero{padding:40px 0 36px}
    .hero-grid{grid-template-columns:1fr;gap:32px}
    .hero-media{order:-1}
    .fg-list{grid-template-columns:repeat(2,1fr)}
    .section{padding:52px 0}
    .cta-panel{grid-template-columns:1fr;padding:40px 32px;gap:24px}
    .cta-section{padding:8px 0 64px}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
    .feature-group{padding:40px 0;scroll-margin-top:110px}
  }

  @media (max-width:767px){
    .search-box{display:none}
    .footer-grid{grid-template-columns:1fr;gap:28px}
    .footer-bottom{flex-direction:column;gap:8px}
  }

  @media (max-width:639px){
    body{font-size:16px}
    .container{padding:0 20px}
    .fg-list{grid-template-columns:1fr}
    .hero-facts{gap:24px}
    .hero-facts strong{font-size:24px}
    .cta-panel{padding:32px 22px;border-radius:var(--r-lg)}
    .page-hero{padding:32px 0 28px}
  }

  @media (prefers-reduced-motion:reduce){
    html{scroll-behavior:auto}
    *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important}
  }

/* roulang page: category2 */
:root{
  --brand:#12A594;
  --brand-deep:#0B7C70;
  --brand-soft:#E6F5F2;
  --accent:#FF6B35;
  --violet:#6B4EF2;
  --bg:#F7F5F1;
  --surface:#FFFFFF;
  --ink-block:#14181D;
  --ink:#15181C;
  --ink-2:#4A5259;
  --ink-3:#7C848C;
  --line:#E4E0D8;
  --ok:#17A673;
  --warn:#E8A13A;
  --danger:#D9534F;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:24px;
  --sh-1:0 1px 2px rgba(21,24,28,.05);
  --sh-2:0 10px 28px rgba(21,24,28,.10);
  --side-w:248px;
  --ease:cubic-bezier(.2,.7,.3,1);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans SC","MiSans","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:17px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}
ul,ol{margin:0;padding:0}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
::selection{background:rgba(18,165,148,.18)}

::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:#D9D4CA;border-radius:999px;border:2px solid var(--bg)}
::-webkit-scrollbar-thumb:hover{background:#C4BEB3}

/* ---------- 布局骨架 ---------- */
.app{min-height:100vh}
.main{
  min-height:100vh;
  display:flex;
  flex-direction:column;
  margin-left:0;
  transition:margin-left .24s var(--ease);
}
.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:0 32px;
}
.content{flex:1}

/* ---------- 左侧导航 ---------- */
.side{
  position:fixed;
  top:0;
  left:0;
  z-index:60;
  width:280px;
  height:100vh;
  display:flex;
  flex-direction:column;
  gap:20px;
  padding:22px 16px 20px;
  background:var(--surface);
  border-right:1px solid var(--line);
  transform:translateX(-102%);
  transition:transform .24s var(--ease),width .24s var(--ease);
  overflow-y:auto;
}
.side.open{transform:translateX(0)}
.side-head{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}
.brand{display:flex;align-items:center;gap:10px;min-width:0}
.brand-mark{
  width:36px;height:36px;flex:none;
  border-radius:10px;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  color:#fff;
  display:grid;place-items:center;
  font-size:16px;font-weight:700;letter-spacing:0;
}
.brand-text{
  font-size:15px;font-weight:700;line-height:1.3;color:var(--ink);
  letter-spacing:-.01em;
  display:block;
}
.side-close{
  display:grid;place-items:center;
  width:32px;height:32px;flex:none;
  border-radius:10px;border:1px solid var(--line);
  color:var(--ink-2);font-size:18px;line-height:1;
  transition:all .2s var(--ease);
}
.side-close:hover{border-color:var(--brand);color:var(--brand-deep);background:var(--brand-soft)}
.side-nav{display:flex;flex-direction:column;gap:8px}
.side-link{
  position:relative;
  display:flex;align-items:center;gap:10px;
  min-height:40px;
  padding:8px 12px;
  border-radius:var(--r-md);
  font-size:15px;
  color:var(--ink-2);
  transition:background .2s var(--ease),color .2s var(--ease);
}
.side-link svg{width:18px;height:18px;flex:none;color:var(--ink-3);transition:color .2s var(--ease)}
.side-link:hover{background:#F2EFE9;color:var(--ink)}
.side-link:hover svg{color:var(--brand)}
.side-link.active{
  background:rgba(18,165,148,.12);
  color:var(--brand-deep);
  font-weight:600;
}
.side-link.active svg{color:var(--brand)}
.side-link.active::before{
  content:"";
  position:absolute;left:-16px;top:50%;transform:translateY(-50%);
  width:3px;height:22px;border-radius:0 3px 3px 0;background:var(--brand);
}
.side-foot{margin-top:auto;display:flex;flex-direction:column;gap:10px;padding-top:18px;border-top:1px solid var(--line)}
.side-note{font-size:12px;color:var(--ink-3);line-height:1.6}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 22px;
  border-radius:var(--r-md);
  border:1px solid transparent;
  font-size:15px;font-weight:600;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-deep);background:var(--brand-soft)}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{background:#F1F6F4;color:var(--brand-deep);transform:translateY(-1px)}
.btn-line{background:transparent;border-color:rgba(255,255,255,.3);color:#fff}
.btn-line:hover{border-color:var(--brand);background:rgba(255,255,255,.08)}
.btn-block{width:100%}

.scrim{
  position:fixed;inset:0;z-index:55;
  background:rgba(20,24,29,.55);
  opacity:0;pointer-events:none;
  transition:opacity .22s var(--ease);
}
.scrim.show{opacity:1;pointer-events:auto}

/* ---------- 顶部工具条 ---------- */
.topbar{
  position:sticky;top:0;z-index:40;
  display:flex;align-items:center;gap:16px;
  height:60px;
  padding:0 32px;
  background:rgba(247,245,241,.88);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.menu-btn{
  display:inline-grid;place-items:center;
  width:40px;height:40px;flex:none;
  border-radius:var(--r-md);
  border:1px solid var(--line);
  background:var(--surface);
  color:var(--ink-2);
  transition:all .2s var(--ease);
}
.menu-btn:hover{border-color:var(--brand);color:var(--brand-deep)}
.crumb{font-size:14px;color:var(--ink-3);display:flex;align-items:center;gap:8px;min-width:0}
.crumb a:hover{color:var(--brand-deep)}
.crumb .sep{color:#C6C0B6}
.crumb .current{color:var(--ink);font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.search{margin-left:auto;position:relative;flex:none}
.search svg{
  position:absolute;left:12px;top:50%;transform:translateY(-50%);
  width:16px;height:16px;color:var(--ink-3);pointer-events:none;
}
.search input{
  width:248px;height:40px;
  padding:0 14px 0 36px;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:var(--surface);
  font-size:14px;color:var(--ink);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.search input::placeholder{color:var(--ink-3)}
.search input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(18,165,148,.12)}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0}
.section + .section{padding-top:0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.04em;
  color:var(--brand-deep);
  margin-bottom:12px;
}
.eyebrow::before{content:"";width:12px;height:3px;border-radius:2px;background:var(--brand)}
h2{font-size:32px;line-height:1.3;font-weight:700;letter-spacing:-.01em}
h3{font-size:22px;line-height:1.4;font-weight:600}
.sec-head{max-width:760px;margin-bottom:40px}
.sec-sub{margin-top:16px;color:var(--ink-2);font-size:16px}
.rule{height:1px;background:var(--line);border:0;margin:0}

/* ---------- Hero ---------- */
.hero{position:relative;padding:72px 0 96px;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(21,24,28,.06) 1px,transparent 1px);
  background-size:22px 22px;
  -webkit-mask-image:linear-gradient(180deg,#000,transparent 72%);
  mask-image:linear-gradient(180deg,#000,transparent 72%);
  pointer-events:none;
}
.hero-grid{
  position:relative;
  display:grid;grid-template-columns:1.05fr 1fr;
  gap:56px;align-items:center;
}
h1{
  font-size:48px;line-height:1.22;font-weight:700;
  letter-spacing:-.01em;margin:0 0 20px;
}
.lead{font-size:18px;color:var(--ink-2);max-width:34em;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:44px}
.stat-row{display:flex;flex-wrap:wrap;gap:40px;list-style:none}
.stat-row strong{
  display:block;font-size:32px;font-weight:700;line-height:1.1;
  color:var(--brand-deep);letter-spacing:-.01em;
}
.stat-row span{font-size:13px;color:var(--ink-3)}
.hero-media{position:relative}
.hero-media img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  border-radius:var(--r-xl);
  box-shadow:var(--sh-2),0 0 0 8px rgba(18,165,148,.08);
}
.float-card{
  position:absolute;left:-28px;bottom:-32px;
  width:264px;
  padding:16px 18px;
  border-radius:var(--r-lg);
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(8px);
  border:1px solid var(--line);
  box-shadow:var(--sh-2);
}
.float-card p{margin-top:8px;font-size:13px;line-height:1.7;color:var(--ink-2)}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:24px;padding:0 10px;
  border-radius:999px;
  font-size:12px;font-weight:600;
  background:var(--brand-soft);color:var(--brand-deep);
  white-space:nowrap;
}
.badge-accent{background:rgba(255,107,53,.12);color:#C24A16}
.badge-violet{background:rgba(107,78,242,.12);color:#4A34B5}

/* ---------- 场景卡 ---------- */
.scene-grid{
  display:grid;grid-template-columns:repeat(2,1fr);
  gap:24px;list-style:none;
}
.scene-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow:hidden;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.scene-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D5EFE9}
.scene-media img{width:100%;aspect-ratio:16/9;object-fit:cover}
.scene-body{padding:22px}
.scene-body h3{margin:12px 0 10px;font-size:20px}
.scene-for{font-size:14px;color:var(--ink-3);line-height:1.7}
.scene-goal{margin-top:10px;font-size:15px;color:var(--ink-2);line-height:1.7}

/* ---------- 步骤时间线 ---------- */
.steps{
  position:relative;
  list-style:none;
  padding-left:8px;
  margin-top:8px;
}
.steps::before{
  content:"";position:absolute;
  left:27px;top:12px;bottom:12px;
  width:1px;background:var(--line);
}
.step{position:relative;padding-left:76px;padding-bottom:40px}
.step:last-child{padding-bottom:0}
.step-dot{
  position:absolute;left:8px;top:0;
  width:40px;height:40px;
  border-radius:999px;
  display:grid;place-items:center;
  background:var(--surface);
  border:1.5px solid var(--brand);
  color:var(--brand-deep);
  font-size:13px;font-weight:700;
  letter-spacing:.02em;
}
.step-body{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:24px 26px;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.step-body:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D5EFE9}
.step-body h3{margin-bottom:10px}
.step-body > p{color:var(--ink-2);font-size:16px}
.tick-list{list-style:none;margin-top:14px;display:grid;gap:8px}
.tick-list li{
  position:relative;padding-left:18px;
  font-size:15px;line-height:1.7;color:var(--ink-2);
}
.tick-list li::before{
  content:"";position:absolute;left:0;top:.68em;
  width:6px;height:6px;border-radius:2px;background:var(--brand);
}
.step-links{margin-top:16px;display:flex;flex-wrap:wrap;gap:20px}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--brand-deep);
  border-bottom:1px solid rgba(11,124,112,.3);
  padding-bottom:2px;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.text-link:hover{color:var(--accent);border-color:var(--accent)}

/* ---------- 术语表 ---------- */
.term-tools{
  display:flex;align-items:center;flex-wrap:wrap;gap:16px;
  margin-bottom:20px;
}
.term-tools .field{position:relative;flex:1 1 320px;max-width:400px}
.term-tools .field svg{
  position:absolute;left:12px;top:50%;transform:translateY(-50%);
  width:16px;height:16px;color:var(--ink-3);pointer-events:none;
}
.term-tools input{
  width:100%;height:48px;
  padding:0 14px 0 36px;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:var(--surface);
  font-size:15px;color:var(--ink);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.term-tools input::placeholder{color:var(--ink-3)}
.term-tools input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(18,165,148,.12)}
.term-count{font-size:14px;color:var(--ink-3)}
.table-wrap{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow-x:auto;
}
table.term-table{width:100%;border-collapse:collapse;min-width:600px}
table.term-table th,table.term-table td{text-align:left;vertical-align:top}
table.term-table thead th{
  background:rgba(18,165,148,.08);
  font-size:14px;font-weight:600;color:var(--ink);
  padding:14px 20px;
  white-space:nowrap;
}
table.term-table tbody th{
  width:32%;
  padding:16px 20px;
  font-size:15px;font-weight:600;color:var(--ink);
  background:rgba(18,165,148,.04);
  border-top:1px solid var(--line);
}
table.term-table tbody td{
  padding:16px 20px;
  font-size:15px;line-height:1.7;color:var(--ink-2);
  border-top:1px solid var(--line);
}
table.term-table tbody tr{transition:background .2s var(--ease)}
table.term-table tbody tr:hover{background:#FAFDFC}
.empty-hint{
  padding:24px 20px;
  font-size:15px;color:var(--ink-2);
  border-top:1px solid var(--line);
  text-align:center;
}
.empty-hint a{color:var(--brand-deep);border-bottom:1px solid rgba(11,124,112,.3)}

/* ---------- 细节提醒 ---------- */
.note-grid{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:24px;list-style:none;
}
.note-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:26px 24px;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.note-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D5EFE9}
.note-head{display:flex;align-items:center;gap:8px;margin-bottom:12px}
.dot{width:10px;height:10px;border-radius:999px;flex:none}
.dot-ok{background:var(--ok)}
.dot-warn{background:var(--warn)}
.dot-violet{background:var(--violet)}
.note-card h3{font-size:17px;margin-bottom:10px}
.note-card p{font-size:15px;color:var(--ink-2);line-height:1.75}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:12px;max-width:880px}
.faq-item{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  overflow:hidden;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.faq-item.open{border-color:var(--brand);box-shadow:var(--sh-1)}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;
  text-align:left;
  font-size:16px;font-weight:600;line-height:1.6;color:var(--ink);
  transition:background .2s var(--ease);
}
.faq-q:hover{background:#FAFDFC}
.faq-icon{position:relative;width:18px;height:18px;flex:none}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
  transition:transform .22s var(--ease);
}
.faq-icon::before{left:0;top:8px;width:18px;height:2px}
.faq-icon::after{left:8px;top:0;width:2px;height:18px}
.faq-item.open .faq-icon::after{transform:scaleY(0)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease)}
.faq-a-inner{padding:0 22px 20px;font-size:16px;line-height:1.8;color:var(--ink-2)}

/* ---------- 结尾 CTA ---------- */
.cta-wrap{padding:0 0 96px}
.cta-band{
  background:var(--ink-block);
  border-radius:var(--r-xl);
  padding:56px;
  display:grid;grid-template-columns:1.4fr 1fr;
  gap:32px;align-items:center;
}
.cta-band h2{color:#fff;font-size:30px;margin-bottom:14px}
.cta-band p{color:#C9CFD4;font-size:16px;line-height:1.8;max-width:36em}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink-block);
  color:#C9CFD4;
  padding:64px 0 32px;
  margin-top:0;
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;
}
.footer-brand p{font-size:14px;line-height:1.8;color:#9AA2A9;margin-top:14px;max-width:32em}
.footer-logo{
  display:flex;align-items:center;gap:10px;
  color:#fff;font-size:17px;font-weight:700;
}
.social-row{display:flex;gap:10px;margin-top:20px}
.social-row a{
  display:grid;place-items:center;
  width:36px;height:36px;
  border-radius:10px;
  border:1px solid rgba(255,255,255,.14);
  color:#C9CFD4;
  transition:all .2s var(--ease);
}
.social-row a:hover{border-color:var(--brand);color:var(--brand)}
.social-row svg{width:18px;height:18px}
.footer-col h3{font-size:15px;color:#fff;font-weight:600;margin-bottom:16px}
.footer-col ul{list-style:none;display:grid;gap:11px;font-size:14px}
.footer-col a{transition:color .2s var(--ease)}
.footer-col a:hover{color:var(--brand)}
.footer-col span{color:#9AA2A9;line-height:1.7}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;
  margin-top:48px;padding-top:24px;
  border-top:1px solid rgba(255,255,255,.1);
  font-size:13px;color:#8E979E;
}

/* ---------- 响应式 ---------- */
@media (min-width:1024px){
  .side{transform:translateX(0);width:76px;padding:22px 12px 20px;align-items:stretch}
  .main{margin-left:76px}
  .menu-btn{display:none}
  .side-close{display:none}
  .brand-text{display:none}
  .brand{justify-content:center}
  .side-link{justify-content:center;padding:8px}
  .side-label{
    position:absolute;left:56px;top:50%;transform:translateY(-50%);
    padding:6px 10px;border-radius:8px;
    background:var(--ink-block);color:#fff;
    font-size:13px;white-space:nowrap;
    opacity:0;pointer-events:none;
    transition:opacity .18s var(--ease);
    z-index:5;
  }
  .side-link:hover .side-label{opacity:1}
  .side-link.active::before{left:-12px}
  .side-foot .btn{padding:0 10px}
  .side-note{display:none}
  .side-foot{padding-top:16px}
  .side-link .side-label-static{display:none}
}
@media (min-width:1280px){
  .side{width:248px;padding:22px 16px 20px}
  .main{margin-left:248px}
  .brand-text{display:block}
  .brand{justify-content:flex-start}
  .side-link{justify-content:flex-start;padding:8px 12px}
  .side-label{position:static;transform:none;opacity:1;background:none;color:inherit;padding:0;font-size:15px;pointer-events:auto}
  .side-link.active::before{left:-16px}
  .side-foot .btn{padding:0 22px}
  .side-note{display:block}
}
@media (max-width:1023px){
  .topbar{height:56px;padding:0 20px}
  .container{padding:0 24px}
}
@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:48px}
  .hero-media{max-width:640px}
  .float-card{left:12px;bottom:-24px}
  .cta-band{grid-template-columns:1fr;padding:40px}
  .cta-actions{justify-content:flex-start}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 20px}
  .section{padding:64px 0}
  .hero{padding:48px 0 72px}
  h1{font-size:32px}
  h2{font-size:24px}
  h3{font-size:19px}
  .lead{font-size:16px}
  .scene-grid{grid-template-columns:1fr}
  .note-grid{grid-template-columns:1fr}
  .stat-row{gap:28px}
  .stat-row strong{font-size:26px}
  .step{padding-left:60px;padding-bottom:28px}
  .steps::before{left:19px}
  .step-dot{left:0;width:40px;height:40px}
  .step-body{padding:20px}
  .search{display:none}
  .float-card{position:static;width:auto;margin-top:16px}
  .cta-wrap{padding-bottom:64px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr}
  .hero-actions .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}