/* roulang page: index */
:root{
  --ink:#0E1516;
  --ink-2:#14201F;
  --ink-3:#1B2A28;
  --paper:#F4F6F5;
  --card:#FFFFFF;
  --brand:#14C8A6;
  --brand-d:#0E9E84;
  --brand-l:#E6FAF5;
  --heat:#FF7A45;
  --violet:#6C4CE0;
  --text:#16211F;
  --text-2:#55635F;
  --text-3:#8A9793;
  --line:#E3E9E7;
  --line-d:rgba(255,255,255,.08);
  --ok:#1F9D6B;
  --warn:#E0A32E;
  --err:#D8543F;
  --info:#3A7BD5;
  --r-card:12px;
  --r-btn:10px;
  --r-img:16px;
  --shadow:0 1px 2px rgba(16,33,31,.06),0 8px 24px -12px rgba(16,33,31,.18);
  --shadow-h:0 2px 4px rgba(16,33,31,.08),0 18px 38px -16px rgba(16,33,31,.3);
  --sidebar-w:248px;
  --gap:24px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16.5px;
  line-height:1.85;
  color:var(--text);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
p+p{margin-top:1.1em}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
::selection{background:var(--brand);color:#04211B}

/* ---------- 侧栏 ---------- */
.sidebar{
  position:fixed;left:0;top:0;bottom:0;width:var(--sidebar-w);
  background:var(--ink);border-right:1px solid var(--line-d);
  display:flex;flex-direction:column;z-index:60;
  transition:width .22s ease;
  overflow:hidden;
}
.sidebar::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:32px 32px;
  opacity:.5;
}
.sidebar::after{
  content:"";position:absolute;top:0;right:0;width:120px;height:120px;
  background:linear-gradient(225deg,rgba(20,200,166,.22),transparent 70%);
  clip-path:polygon(100% 0,100% 100%,0 0);
  pointer-events:none;
}
.brand{
  height:72px;display:flex;align-items:center;gap:10px;
  padding:0 18px;position:relative;z-index:2;
  border-bottom:1px solid var(--line-d);flex-shrink:0;
}
.brand-mark{
  width:34px;height:34px;flex-shrink:0;border-radius:9px;
  background:linear-gradient(135deg,var(--brand),#0B7F6A);
  display:grid;place-items:center;color:#03231C;font-weight:800;font-size:16px;
  clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2;overflow:hidden}
.brand-name{font-size:15px;font-weight:700;color:#fff;white-space:nowrap}
.brand-desc{font-size:11px;color:rgba(255,255,255,.42);white-space:nowrap;letter-spacing:.5px}
.nav-scroll{flex:1;overflow-y:auto;padding:16px 12px;position:relative;z-index:2}
.nav-group-title{
  font-size:11px;letter-spacing:.14em;color:rgba(255,255,255,.34);
  padding:10px 10px 8px;text-transform:uppercase;
}
.nav-item{
  display:flex;align-items:center;gap:12px;height:44px;padding:0 12px;
  border-radius:9px;color:rgba(255,255,255,.72);font-size:15px;
  position:relative;transition:background .18s ease,color .18s ease;
}
.nav-item .ic{width:18px;height:18px;flex-shrink:0;opacity:.8}
.nav-item span{white-space:nowrap}
.nav-item:hover{background:rgba(255,255,255,.06);color:#fff}
.nav-item.active{background:rgba(20,200,166,.1);color:#fff;font-weight:600}
.nav-item.active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;
  border-radius:0 3px 3px 0;background:var(--brand);
}
.nav-item.active .ic{opacity:1;color:var(--brand)}
.sidebar-foot{
  padding:14px 14px 18px;border-top:1px solid var(--line-d);
  display:flex;flex-direction:column;gap:10px;position:relative;z-index:2;flex-shrink:0;
}
.sidebar-foot .btn{width:100%;justify-content:center}
.collapse-btn{
  position:absolute;right:0;top:50%;transform:translateY(-50%);
  width:22px;height:56px;border-radius:8px 0 0 8px;
  background:var(--ink-2);border:1px solid var(--line-d);border-right:0;
  display:grid;place-items:center;color:rgba(255,255,255,.6);z-index:5;
}
.collapse-btn:hover{color:var(--brand)}
.sidebar.collapsed{width:88px}
.sidebar.collapsed .brand{padding:0;justify-content:center}
.sidebar.collapsed .brand-text,
.sidebar.collapsed .nav-group-title,
.sidebar.collapsed .nav-item span,
.sidebar.collapsed .sidebar-foot .btn span{display:none}
.sidebar.collapsed .nav-item{justify-content:center;padding:0}
.sidebar.collapsed .sidebar-foot{padding:12px 10px}
.sidebar.collapsed .btn{padding:0;width:44px;height:44px;margin:0 auto}

/* ---------- 主区域 ---------- */
.main{
  margin-left:var(--sidebar-w);
  min-height:100vh;
  transition:margin-left .22s ease;
}
.main.wide{margin-left:88px}
.container{max-width:1200px;margin:0 auto;padding:0 40px}
.section{padding:88px 0}
.section.tight{padding:56px 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap}
.sec-head h2{font-size:26px;font-weight:700;line-height:1.3;letter-spacing:-.2px}
.sec-head .sec-sub{margin-top:8px;font-size:14px;color:var(--text-2)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.12em;color:var(--brand-d);
  text-transform:uppercase;font-weight:700;margin-bottom:10px;
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--brand);border-radius:2px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:transform .16s ease,background .18s ease,box-shadow .18s ease,border-color .18s ease;
  position:relative;overflow:hidden;white-space:nowrap;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);color:#04241D;box-shadow:0 8px 20px -10px rgba(20,200,166,.85)}
.btn-primary:hover{background:var(--brand-d);color:#fff;box-shadow:0 12px 26px -10px rgba(14,158,132,.9)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.28);color:#fff}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);background:rgba(20,200,166,.08)}
.btn-outline{background:transparent;border-color:var(--line);color:var(--text)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand-d);background:var(--brand-l)}
.btn-lg{height:48px;padding:0 28px;font-size:15.5px}
.btn-block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none}
.btn-primary::after{
  content:"";position:absolute;top:0;left:-120%;width:60%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.42),transparent);
  transition:left .55s ease;
}
.btn-primary:hover::after{left:130%}

/* ---------- 标签 / 徽章 ---------- */
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:6px;background:var(--brand-l);color:var(--brand-d);
  font-size:12.5px;font-weight:600;line-height:1;
}
.tag.dark{background:rgba(20,200,166,.14);color:var(--brand)}
.tag.violet{background:rgba(108,76,224,.12);color:var(--violet)}
.badge{
  display:inline-block;padding:3px 10px;font-size:11.5px;font-weight:700;
  letter-spacing:.06em;background:var(--brand);color:#04241D;
  clip-path:polygon(6px 0,100% 0,100% calc(100% - 6px),calc(100% - 6px) 100%,0 100%,0 6px);
}
.badge.heat{background:var(--heat);color:#3A1300}
.dot{width:4px;height:4px;border-radius:50%;background:var(--text-3);display:inline-block}

/* ---------- Hero ---------- */
.hero{
  background:var(--ink);color:#fff;position:relative;overflow:hidden;
  padding:72px 0 76px;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:38px 38px;opacity:.55;
}
.hero::after{
  content:"";position:absolute;top:-40px;right:-60px;width:420px;height:420px;
  background:radial-gradient(circle at 70% 30%,rgba(20,200,166,.16),transparent 62%);
  pointer-events:none;
}
.hero-grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;
}
.hero-kicker{
  display:inline-flex;align-items:center;gap:10px;height:30px;padding:0 14px;
  border-radius:8px;border:1px solid rgba(20,200,166,.34);background:rgba(20,200,166,.1);
  font-size:12.5px;font-weight:600;color:var(--brand);letter-spacing:.04em;margin-bottom:20px;
}
.hero h1{
  font-size:38px;line-height:1.25;font-weight:700;letter-spacing:-.5px;
}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero-sub{
  margin-top:18px;font-size:17px;line-height:1.7;color:rgba(255,255,255,.72);max-width:520px;
}
.hero-actions{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.trust-row{display:flex;gap:26px;margin-top:34px;flex-wrap:wrap}
.trust-row li{display:flex;align-items:center;gap:9px;font-size:13.5px;color:rgba(255,255,255,.68)}
.trust-row .tic{
  width:22px;height:22px;border-radius:6px;background:rgba(20,200,166,.16);
  display:grid;place-items:center;color:var(--brand);font-size:12px;font-weight:700;
  clip-path:polygon(5px 0,100% 0,100% calc(100% - 5px),calc(100% - 5px) 100%,0 100%,0 5px);
}
.hero-media{position:relative}
.hero-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-img);
  border:1px solid rgba(20,200,166,.2);
  box-shadow:0 30px 60px -30px rgba(0,0,0,.85);
}
.corner-tag{
  position:absolute;left:14px;bottom:14px;
  padding:6px 14px;font-size:12.5px;font-weight:700;color:#04241D;
  background:var(--brand);
  clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px);
}
.hero-stat{
  position:absolute;right:-14px;top:26px;background:#fff;color:var(--text);
  border-radius:12px;padding:12px 16px;box-shadow:var(--shadow);
  display:flex;flex-direction:column;gap:2px;min-width:118px;
}
.hero-stat b{font-size:20px;line-height:1.2;color:var(--brand-d);font-weight:800}
.hero-stat small{font-size:11.5px;color:var(--text-3)}

/* ---------- 数据条 ---------- */
.metrics{
  display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap);
  margin-top:-38px;position:relative;z-index:5;
}
.metric{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px 24px;box-shadow:var(--shadow);
}
.metric b{display:block;font-size:26px;font-weight:800;color:var(--text);letter-spacing:-.5px}
.metric span{font-size:13.5px;color:var(--text-2)}

/* ---------- 对比表 ---------- */
.compare-wrap{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--shadow);
}
.table-scroll{overflow-x:auto;max-height:640px;overflow-y:auto}
table.plan{width:100%;border-collapse:separate;border-spacing:0;min-width:720px}
table.plan th,table.plan td{padding:16px 20px;text-align:left;font-size:15px;border-bottom:1px solid var(--line)}
table.plan thead th{
  position:sticky;top:0;z-index:3;background:var(--brand-l);
  font-size:14px;font-weight:700;color:var(--brand-d);
}
table.plan thead th:first-child{background:#F1F6F5;color:var(--text-2)}
table.plan tbody tr:nth-child(even){background:#FAFCFB}
table.plan tbody tr:hover{background:rgba(20,200,166,.04)}
table.plan td:first-child{font-weight:600;color:var(--text-2)}
table.plan .col-rec{background:#F0FBF8;position:relative}
table.plan thead .col-rec{background:#E2F8F2}
.rec-flag{
  display:block;height:4px;background:var(--brand);border-radius:4px 4px 0 0;
  width:100%;margin-bottom:10px;
}
.cell-yes{color:var(--ok);font-weight:700}
.cell-no{color:var(--text-3)}
.price-line{display:flex;align-items:baseline;gap:4px;margin-top:6px}
.price-line b{font-size:20px;font-weight:800;color:var(--text)}
.price-line small{font-size:12px;color:var(--text-3)}
.mobile-plans{display:none;gap:16px;flex-direction:column}

/* ---------- 等级卡 ---------- */
.level-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap)}
.level-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px 24px;box-shadow:var(--shadow);position:relative;
  transition:transform .2s ease,box-shadow .2s ease;
}
.level-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-h)}
.level-idx{
  font-size:12px;font-weight:800;letter-spacing:.14em;color:var(--text-3);
  display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;
}
.level-card h3{font-size:18px;font-weight:700;margin-bottom:8px}
.level-card .lv-desc{font-size:14px;color:var(--text-2);min-height:48px}
.energy{height:6px;border-radius:6px;background:#EEF2F1;margin:18px 0 20px;overflow:hidden}
.energy i{display:block;height:100%;border-radius:6px;background:linear-gradient(90deg,var(--brand),var(--heat))}
.level-list li{
  display:flex;gap:10px;font-size:14.5px;color:var(--text-2);
  padding:7px 0;border-bottom:1px dashed var(--line);
}
.level-list li:last-child{border-bottom:0}
.level-list li::before{
  content:"";width:6px;height:6px;border-radius:2px;background:var(--brand);
  margin-top:9px;flex-shrink:0;
}
.level-card .more{
  display:inline-flex;align-items:center;gap:6px;margin-top:18px;
  font-size:14px;font-weight:600;color:var(--brand-d);
}
.level-card .more:hover{color:var(--heat);gap:10px}

/* ---------- 专属内容预览 ---------- */
.showcase{display:grid;grid-template-columns:2fr 1fr;gap:var(--gap)}
.feat-card{
  position:relative;border-radius:var(--r-img);overflow:hidden;min-height:420px;
  display:flex;align-items:flex-end;box-shadow:var(--shadow);
  border:1px solid var(--line);
}
.feat-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.feat-card:hover img{transform:scale(1.04)}
.feat-card .veil{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(14,21,22,.05) 30%,rgba(14,21,22,.88));
}
.feat-body{position:relative;z-index:2;padding:26px;color:#fff}
.feat-body h3{font-size:20px;font-weight:700;line-height:1.45;margin-top:12px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.feat-body p{font-size:14px;color:rgba(255,255,255,.72);margin-top:10px}
.side-stack{display:flex;flex-direction:column;gap:var(--gap)}
.mini-card{
  display:flex;gap:14px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow);
  transition:transform .2s ease,box-shadow .2s ease;padding:14px;
}
.mini-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-h)}
.mini-card img{width:110px;height:82px;object-fit:cover;border-radius:10px;flex-shrink:0}
.mini-card h3{font-size:15.5px;font-weight:700;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.mini-card p{font-size:13px;color:var(--text-3);margin-top:6px}

/* ---------- 资讯列表 ---------- */
.filter-row{display:flex;gap:10px;flex-wrap:wrap}
.chip{
  height:32px;padding:0 14px;border-radius:8px;border:1px solid var(--line);
  background:#fff;display:inline-flex;align-items:center;font-size:13.5px;
  color:var(--text-2);transition:all .18s ease;
}
.chip:hover{border-color:var(--brand);color:var(--brand-d)}
.chip.on{background:var(--brand-l);border-color:var(--brand);color:var(--brand-d);font-weight:600}
.news-list{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--gap)}
.news-card{
  display:flex;gap:18px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);padding:16px;box-shadow:var(--shadow);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-h);border-color:#CFE7E0}
.news-thumb{flex-shrink:0;width:200px;height:126px;border-radius:10px;overflow:hidden;background:#EEF2F1}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.news-card:hover .news-thumb img{transform:scale(1.05)}
.news-body{display:flex;flex-direction:column;min-width:0}
.news-title{
  font-size:17px;font-weight:700;line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-title a:hover{color:var(--brand-d)}
.news-sum{
  font-size:15px;color:var(--text-2);margin-top:8px;line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{display:flex;align-items:center;gap:10px;margin-top:auto;padding-top:12px;font-size:13px;color:var(--text-3)}
.empty-state{
  grid-column:1/-1;text-align:center;padding:56px 24px;
  background:var(--card);border:1px dashed var(--line);border-radius:var(--r-card);
}
.empty-state .shape{
  width:74px;height:54px;margin:0 auto 18px;border-radius:10px;
  background:linear-gradient(135deg,#E9EFED,#F7FAF9);border:1px solid var(--line);
}
.empty-state p{color:var(--text-2);font-size:15px;margin-bottom:18px}

/* ---------- FAQ ---------- */
.faq-box{max-width:860px;margin:0 auto}
.faq-item{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  margin-bottom:12px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item.is-open{border-color:#CFE7E0;box-shadow:var(--shadow)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:16px;text-align:left;
  padding:0 22px;min-height:56px;font-size:16px;font-weight:600;color:var(--text);
  position:relative;
}
.faq-item.is-open .faq-q::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--brand);
}
.faq-plus{
  width:24px;height:24px;flex-shrink:0;border-radius:7px;background:var(--brand-l);
  color:var(--brand-d);display:grid;place-items:center;font-size:15px;font-weight:700;
  transition:transform .22s ease,background .22s ease,color .22s ease;
}
.faq-item.is-open .faq-plus{background:var(--brand);color:#04241D;transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a-inner{padding:0 22px 22px 62px;font-size:15px;color:var(--text-2);line-height:1.85}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--ink);color:#fff;position:relative;overflow:hidden;padding:76px 0;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:38px 38px;opacity:.5;
}
.cta-grid{position:relative;z-index:2;display:grid;grid-template-columns:6fr 4fr;gap:48px;align-items:center}
.cta-grid h2{font-size:26px;font-weight:700;line-height:1.35}
.cta-list{margin-top:22px;display:flex;flex-direction:column;gap:12px}
.cta-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:rgba(255,255,255,.76)}
.cta-list .ck{
  width:20px;height:20px;flex-shrink:0;border-radius:6px;background:rgba(20,200,166,.18);
  color:var(--brand);display:grid;place-items:center;font-size:12px;font-weight:800;margin-top:4px;
  clip-path:polygon(5px 0,100% 0,100% calc(100% - 5px),calc(100% - 5px) 100%,0 100%,0 5px);
}
.form-card{
  background:#fff;border-radius:16px;padding:26px;color:var(--text);
  box-shadow:0 30px 60px -30px rgba(0,0,0,.7);
}
.form-card h3{font-size:18px;font-weight:700;margin-bottom:6px}
.form-card .form-tip{font-size:13.5px;color:var(--text-3);margin-bottom:18px}
.field{margin-bottom:14px}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--text-2);margin-bottom:7px}
.input{
  width:100%;height:46px;padding:0 14px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:#FBFCFC;font-size:15px;
  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
.input:focus{outline:none;border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(20,200,166,.16)}
.input.err{border-color:var(--err);box-shadow:0 0 0 3px rgba(216,84,63,.12)}
.code-row{display:flex;gap:10px}
.code-row .input{flex:1}
.code-btn{
  height:46px;padding:0 16px;border-radius:var(--r-btn);border:1px solid var(--brand);
  background:var(--brand-l);color:var(--brand-d);font-size:14px;font-weight:600;white-space:nowrap;
  transition:background .18s ease,color .18s ease;
}
.code-btn:hover{background:var(--brand);color:#04241D}
.code-btn.is-disabled{opacity:.4;cursor:not-allowed}
.err-msg{
  display:none;font-size:13px;color:var(--err);margin-top:8px;
}
.err-msg.show{display:block}
.agree{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--text-2);margin:6px 0 16px}
.agree input{margin-top:4px;width:16px;height:16px;accent-color:var(--brand)}
.form-foot{font-size:12px;color:var(--text-3);margin-top:14px;line-height:1.7}
.form-foot a{color:var(--brand-d);text-decoration:underline;text-underline-offset:3px}

/* ---------- 页脚 ---------- */
.footer{background:var(--ink);color:rgba(255,255,255,.7);padding:64px 0 0;position:relative}
.footer::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:40px 40px;opacity:.5;pointer-events:none;
}
.footer-grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px;
  padding-bottom:44px;
}
.footer h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:18px;letter-spacing:.02em}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-name{font-size:15px;color:#fff;font-weight:700}
.footer-brand .brand-desc{font-size:11px;color:rgba(255,255,255,.4)}
.footer p{font-size:13.5px;line-height:1.8;color:rgba(255,255,255,.55);max-width:320px}
.footer-links li{margin-bottom:11px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.66);transition:color .18s ease,padding-left .18s ease}
.footer-links a:hover{color:var(--brand);padding-left:4px}
.footer-contact li{font-size:14px;color:rgba(255,255,255,.6);margin-bottom:11px}
.footer-contact b{color:rgba(255,255,255,.86);font-weight:600}
.footer-bottom{
  position:relative;z-index:2;border-top:1px solid var(--line-d);
  padding:22px 0;display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,.42);max-width:none}
.to-top{
  width:40px;height:40px;border-radius:50%;border:1px solid rgba(255,255,255,.24);
  display:grid;place-items:center;color:rgba(255,255,255,.7);font-size:15px;
  transition:all .18s ease;
}
.to-top:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}

/* ---------- 移动端顶栏 / 抽屉 ---------- */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:56px;z-index:80;
  background:var(--ink);border-bottom:1px solid var(--line-d);
  align-items:center;justify-content:space-between;padding:0 16px;
}
.topbar .brand-name{font-size:15px;color:#fff}
.topbar .brand-desc{display:none}
.hamburger{
  width:40px;height:40px;border-radius:9px;border:1px solid var(--line-d);
  display:grid;place-items:center;color:#fff;gap:4px;
}
.hamburger i{display:block;width:17px;height:2px;background:currentColor;border-radius:2px;transition:.2s}
.drawer{
  position:fixed;inset:0;z-index:90;background:rgba(14,21,22,.94);
  transform:translateX(100%);transition:transform .26s ease;
  padding:22px 20px;overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
.drawer-head .brand-name{font-size:16px;color:#fff;font-weight:700}
.drawer-close{width:40px;height:40px;border-radius:9px;border:1px solid var(--line-d);color:#fff;display:grid;place-items:center}
.drawer-nav a{
  display:flex;align-items:center;height:50px;padding:0 14px;border-radius:10px;
  color:rgba(255,255,255,.78);font-size:15.5px;margin-bottom:6px;
  border:1px solid transparent;
}
.drawer-nav a.active{background:rgba(20,200,166,.12);color:#fff;border-color:rgba(20,200,166,.3);font-weight:600}
.drawer-foot{margin-top:22px;display:flex;flex-direction:column;gap:12px}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .sidebar{width:88px}
  .sidebar .brand{padding:0;justify-content:center}
  .sidebar .brand-text,
  .sidebar .nav-group-title,
  .sidebar .nav-item span,
  .sidebar .sidebar-foot .btn span{display:none}
  .sidebar .nav-item{justify-content:center;padding:0}
  .sidebar .sidebar-foot{padding:12px 10px}
  .sidebar .btn{padding:0;width:44px;height:44px;margin:0 auto}
  .main{margin-left:88px}
  .main.wide{margin-left:88px}
  .collapse-btn{display:none}
  .hero-grid{gap:40px}
  .container{padding:0 28px}
}
@media (max-width:1023px){
  .metrics{grid-template-columns:repeat(2,1fr)}
  .level-grid{grid-template-columns:1fr;gap:18px}
  .showcase{grid-template-columns:1fr}
  .feat-card{min-height:320px}
  .side-stack{flex-direction:row}
  .mini-card{flex:1}
  .news-list{grid-template-columns:1fr}
  .cta-grid{grid-template-columns:1fr;gap:34px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px 24px}
}
@media (max-width:767px){
  .sidebar{display:none}
  .topbar{display:flex}
  .main{margin-left:0;padding-top:56px}
  .container{padding:0 16px}
  .section{padding:56px 0}
  .hero{padding:48px 0 56px}
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .hero h1{font-size:26px}
  .hero-sub{font-size:16px}
  .hero-media img{aspect-ratio:16/10}
  .hero-stat{right:10px;top:12px;padding:10px 13px}
  .metrics{grid-template-columns:1fr;margin-top:-22px}
  .sec-head{margin-bottom:26px}
  .sec-head h2{font-size:21px}
  .table-scroll{display:none}
  .mobile-plans{display:flex}
  .plan-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:22px;box-shadow:var(--shadow)}
  .plan-card.rec{border-color:var(--brand);background:#F0FBF8}
  .plan-card h3{font-size:17px;font-weight:700;display:flex;align-items:center;gap:10px}
  .plan-card .price-line b{font-size:22px}
  .plan-card ul{margin-top:14px}
  .plan-card li{display:flex;gap:10px;font-size:14.5px;color:var(--text-2);padding:6px 0}
  .plan-card li::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--brand);margin-top:9px;flex-shrink:0}
  .news-card{flex-direction:column;gap:12px}
  .news-thumb{width:100%;height:170px}
  .side-stack{flex-direction:column}
  .mini-card img{width:96px;height:72px}
  .faq-a-inner{padding:0 18px 20px 18px}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .form-card{padding:20px}
}
@media (max-width:480px){
  .hero h1{font-size:24px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .trust-row{gap:14px}
  .btn{padding:0 18px}
  .news-thumb{height:150px}
  .code-row{flex-direction:column}
  .code-btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}
  html{scroll-behavior:auto}
}

/* roulang page: article */
:root{
  --ink:#0E1516;
  --ink-2:#14201F;
  --ink-3:#1B2A28;
  --paper:#F4F6F5;
  --card:#FFFFFF;
  --brand:#14C8A6;
  --brand-dark:#0E9E84;
  --brand-soft:#E6FAF5;
  --brand-tint:#F0FBF8;
  --heat:#FF7A45;
  --violet:#6C4CE0;
  --text:#16211F;
  --text-2:#55635F;
  --text-3:#8A9793;
  --line:#E3E9E7;
  --line-dark:rgba(255,255,255,.08);
  --success:#1F9D6B;
  --warn:#E0A32E;
  --error:#D8543F;
  --r-card:12px;
  --r-btn:10px;
  --r-img:16px;
  --sh-1:0 1px 2px rgba(16,33,31,.06), 0 8px 24px -12px rgba(16,33,31,.18);
  --sh-2:0 2px 4px rgba(16,33,31,.07), 0 18px 38px -16px rgba(16,33,31,.26);
  --f: "Inter", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --side:248px;
  --nav-h:56px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--f);
  font-size:16.5px;
  line-height:1.85;
  color:var(--text);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0;padding:0}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5{margin:0;font-weight:700;line-height:1.28}
p{margin:0 0 1.1em}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
::selection{background:var(--brand-soft);color:#0b2c26}

/* ---------- 容器 ---------- */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 40px}
.section{padding:88px 0}
.section-tight{padding:56px 0}

/* ---------- 侧边导航 ---------- */
.sidebar{
  position:fixed;left:0;top:0;bottom:0;width:var(--side);
  background:var(--ink);
  border-right:1px solid var(--line-dark);
  display:flex;flex-direction:column;
  z-index:80;
  transition:width .26s cubic-bezier(.4,0,.2,1),transform .26s cubic-bezier(.4,0,.2,1);
}
.sidebar::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.35;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:36px 36px;
}
.brand{
  position:relative;z-index:1;
  display:flex;align-items:center;gap:12px;
  height:72px;flex:0 0 72px;padding:0 18px;
  border-bottom:1px solid var(--line-dark);
}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;
  display:flex;align-items:center;justify-content:center;
  font-size:18px;font-weight:800;color:#06231D;
  background:linear-gradient(135deg,var(--brand),var(--brand-dark));
  clip-path:polygon(9px 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%,0 9px);
}
.brand-text{display:flex;flex-direction:column;overflow:hidden;white-space:nowrap}
.brand-name{font-size:15px;font-weight:700;color:#fff;letter-spacing:.3px}
.brand-desc{font-size:11.5px;color:rgba(255,255,255,.42);letter-spacing:1.4px}
.collapse-btn{
  position:absolute;right:-13px;top:86px;z-index:90;
  width:26px;height:26px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--ink-2);border:1px solid var(--line-dark);
  color:#9FB0AC;font-size:14px;line-height:1;
  transition:background .2s,color .2s,transform .26s;
}
.collapse-btn:hover{background:var(--brand);color:#06231D;border-color:var(--brand)}
.nav-scroll{
  position:relative;z-index:1;
  flex:1 1 auto;overflow-y:auto;padding:18px 12px;
}
.nav-scroll::-webkit-scrollbar{width:6px}
.nav-scroll::-webkit-scrollbar-thumb{background:rgba(255,255,255,.12);border-radius:3px}
.nav-group-title{
  font-size:11px;letter-spacing:2px;color:rgba(255,255,255,.32);
  margin:6px 0 10px 12px;font-weight:600;
}
.nav-item{
  position:relative;display:flex;align-items:center;gap:11px;
  height:44px;padding:0 12px;margin-bottom:4px;
  border-radius:9px;color:rgba(255,255,255,.72);
  font-size:15px;font-weight:500;white-space:nowrap;
  transition:background .18s,color .18s;
}
.nav-item .ic{width:18px;height:18px;flex:0 0 18px;color:rgba(255,255,255,.55);transition:color .18s}
.nav-item:hover{background:rgba(255,255,255,.06);color:#fff}
.nav-item:hover .ic{color:var(--brand)}
.nav-item.active{background:rgba(20,200,166,.12);color:#fff}
.nav-item.active .ic{color:var(--brand)}
.nav-item.active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;
  border-radius:2px;background:var(--brand);
}
.sidebar-foot{
  position:relative;z-index:1;
  flex:0 0 auto;padding:14px 12px 18px;
  border-top:1px solid var(--line-dark);
  display:flex;flex-direction:column;gap:9px;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:42px;padding:0 18px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background .2s,color .2s,border-color .2s,transform .12s,box-shadow .2s;
  white-space:nowrap;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);color:#06231D;box-shadow:0 6px 18px -8px rgba(20,200,166,.8)}
.btn-primary:hover{background:var(--brand-dark);color:#fff}
.btn-ghost{background:transparent;color:rgba(255,255,255,.8);border-color:rgba(255,255,255,.18)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);background:rgba(20,200,166,.08)}
.btn-lg{height:48px;padding:0 26px;font-size:15.5px}
.btn-line{background:transparent;border-color:var(--line);color:var(--text)}
.btn-line:hover{border-color:var(--brand);color:var(--brand-dark);background:var(--brand-soft)}
.btn-block{width:100%}

/* 折叠态 */
.sidebar.is-collapsed{width:88px}
.sidebar.is-collapsed .brand-text,
.sidebar.is-collapsed .nav-group-title,
.sidebar.is-collapsed .nav-item span{display:none}
.sidebar.is-collapsed .brand{justify-content:center;padding:0}
.sidebar.is-collapsed .nav-item{justify-content:center;padding:0;gap:0}
.sidebar.is-collapsed .nav-item.active::before{display:none}
.sidebar.is-collapsed .sidebar-foot{display:none}
.sidebar.is-collapsed .collapse-btn{transform:rotate(180deg)}

/* ---------- 移动端 ---------- */
.mobile-bar{
  position:fixed;top:0;left:0;right:0;height:var(--nav-h);
  display:none;align-items:center;justify-content:space-between;
  padding:0 16px;background:rgba(14,21,22,.96);
  border-bottom:1px solid var(--line-dark);z-index:100;
  backdrop-filter:blur(6px);
}
.mobile-brand{display:flex;align-items:center;gap:10px}
.mobile-brand .brand-mark{width:30px;height:30px;flex:0 0 30px;font-size:15px;border-radius:8px}
.mobile-brand .brand-name{font-size:14.5px}
.hamburger{
  width:40px;height:40px;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:5px;border-radius:9px;
  border:1px solid var(--line-dark);
}
.hamburger span{display:block;width:18px;height:2px;border-radius:2px;background:#fff;transition:transform .25s,opacity .25s}
.hamburger.on span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.on span:nth-child(2){opacity:0}
.hamburger.on span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.scrim{
  position:fixed;inset:0;background:rgba(6,14,14,.55);
  opacity:0;visibility:hidden;transition:opacity .25s,visibility .25s;z-index:79;
}
.scrim.on{opacity:1;visibility:visible}

/* ---------- 页面主体 ---------- */
.page{margin-left:var(--side);min-height:100vh;display:flex;flex-direction:column;transition:margin-left .26s cubic-bezier(.4,0,.2,1)}
.page.wide{margin-left:88px}
main{flex:1 1 auto}

/* ---------- 面包屑 ---------- */
.crumb-bar{background:#fff;border-bottom:1px solid var(--line)}
.crumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:6px;
  padding:14px 0;font-size:13px;color:var(--text-3);
}
.crumb a{color:var(--text-3);transition:color .18s}
.crumb a:hover{color:var(--brand-dark)}
.crumb .sep{color:#C9D2D0}
.crumb .now{color:var(--text-2);max-width:60%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 文章区 ---------- */
.article-wrap{background:#fff;padding:44px 0 72px}
.article-shell{display:block}
.article-main{max-width:760px;margin:0 auto}
.article-aside{display:none}

.cat-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:16px}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:6px;background:var(--brand-soft);color:var(--brand-dark);
  font-size:12.5px;font-weight:600;letter-spacing:.2px;
}
.tag-line{display:inline-flex;align-items:center;height:24px;padding:0 10px;border:1px solid var(--line);border-radius:6px;font-size:12.5px;color:var(--text-2)}

.article-head h1{
  font-size:32px;line-height:1.32;letter-spacing:-.4px;margin-bottom:18px;
}
.article-lead{
  font-size:16px;color:var(--text-2);line-height:1.85;
  padding-left:16px;border-left:3px solid var(--brand);
  margin-bottom:24px;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
  padding:14px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:#D5DDDB;display:inline-block;margin-right:22px;vertical-align:middle}

/* 正文排版 */
.article-body{font-size:16.5px;line-height:1.9;color:var(--text);margin-top:32px}
.article-body > p:first-child{font-size:18px;line-height:1.85;color:#26332F}
.article-body p{margin:0 0 1.15em}
.article-body h2{
  position:relative;font-size:24px;line-height:1.35;
  margin:44px 0 16px;padding-left:14px;scroll-margin-top:80px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:4px;
  border-radius:2px;background:var(--brand);
}
.article-body h3{font-size:19px;margin:30px 0 12px;color:#1C2B28}
.article-body h4{font-size:17px;margin:24px 0 10px;color:#1C2B28}
.article-body ul{margin:0 0 1.3em}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:9px}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;
  border-radius:2px;background:var(--brand);
}
.article-body ol{list-style:decimal;padding-left:22px;margin:0 0 1.3em}
.article-body ol li{margin-bottom:9px;padding-left:4px}
.article-body blockquote{
  margin:26px 0;padding:18px 22px;background:var(--brand-soft);
  border-left:4px solid var(--brand);border-radius:0 10px 10px 0;
  color:#1F3B36;font-size:16.5px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body a{color:var(--brand-dark);border-bottom:1px solid rgba(14,158,132,.32);transition:border-color .18s,color .18s}
.article-body a:hover{color:#0A7D67;border-bottom-color:#0A7D67}
.article-body img{border-radius:12px;margin:22px auto;max-width:100%;height:auto}
.article-body figure{margin:24px 0}
.article-body figcaption{text-align:center;font-size:13px;color:var(--text-3);margin-top:8px}
.article-body table{margin:24px 0;font-size:15px;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.article-body thead th{background:var(--brand-soft);color:#123B34;font-weight:700;text-align:left;padding:12px 14px;font-size:14px}
.article-body tbody td{padding:12px 14px;border-top:1px solid var(--line);color:var(--text-2)}
.article-body tbody tr:nth-child(even){background:#FAFCFB}
.article-body tbody tr:hover{background:rgba(20,200,166,.06)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0}

/* 空态 */
.empty-state{
  text-align:center;padding:72px 24px;background:#fff;
  border:1px dashed var(--line);border-radius:var(--r-img);margin-top:32px;
}
.empty-state .glyph{
  width:88px;height:88px;margin:0 auto 20px;border-radius:20px;
  background:var(--paper);display:flex;align-items:center;justify-content:center;
  color:var(--text-3);font-size:30px;font-weight:800;
  clip-path:polygon(16px 0,100% 0,100% calc(100% - 16px),calc(100% - 16px) 100%,0 100%,0 16px);
}
.empty-state h2{font-size:22px;margin-bottom:10px}
.empty-state p{color:var(--text-2);margin-bottom:22px}

/* 标签组 */
.tag-group{margin-top:44px;padding-top:26px;border-top:1px solid var(--line)}
.tag-group h3{font-size:15px;color:var(--text-2);margin-bottom:14px;font-weight:600}
.tag-list{display:flex;flex-wrap:wrap;gap:10px}
.tag-list a{
  display:inline-flex;align-items:center;height:30px;padding:0 13px;
  border:1px solid var(--line);border-radius:8px;font-size:13.5px;color:var(--text-2);
  transition:all .18s;
}
.tag-list a:hover{border-color:var(--brand);color:var(--brand-dark);background:var(--brand-soft);transform:translateY(-2px)}

/* 相关推荐 */
.rel-section{margin-top:64px}
.rel-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:22px}
.rel-head h2{font-size:22px}
.rel-head h2 span{color:var(--brand-dark)}
.rel-head p{font-size:14px;color:var(--text-3);margin:0}
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.rel-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .22s,box-shadow .22s,border-color .22s;
  display:flex;flex-direction:column;
}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#CFE6E0}
.rel-fig{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--paper)}
.rel-fig img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.rel-card:hover .rel-fig img{transform:scale(1.05)}
.rel-badge{
  position:absolute;left:10px;top:10px;height:22px;padding:0 9px;
  display:inline-flex;align-items:center;font-size:11.5px;font-weight:700;
  background:rgba(14,21,22,.82);color:var(--brand);letter-spacing:.5px;
  clip-path:polygon(7px 0,100% 0,100% 100%,0 100%,0 7px);
}
.rel-body{padding:16px 18px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.rel-body h3{font-size:16px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rel-body p{font-size:13.5px;color:var(--text-3);margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rel-body .rel-more{margin-top:auto;font-size:13.5px;font-weight:600;color:var(--brand-dark)}

/* 上/下篇 */
.pn-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:34px}
.pn-card{
  display:flex;align-items:center;gap:14px;padding:18px 20px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  transition:transform .22s,box-shadow .22s,border-color .22s;
}
.pn-card:hover{transform:translateY(-3px);box-shadow:var(--sh-1);border-color:#CFE6E0}
.pn-arrow{
  width:38px;height:38px;flex:0 0 38px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand-dark);font-size:17px;font-weight:700;
}
.pn-text{display:flex;flex-direction:column;gap:3px;overflow:hidden}
.pn-text b{font-size:15px;font-weight:700}
.pn-text i{font-size:13px;color:var(--text-3);font-style:normal;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.pn-card.next{flex-direction:row-reverse;text-align:right}
.pn-card.next .pn-text{align-items:flex-end}

/* 返回入口 */
.back-bar{
  margin-top:40px;display:flex;align-items:center;justify-content:space-between;
  gap:18px;flex-wrap:wrap;padding:22px 24px;
  background:var(--brand-tint);border:1px solid #D5F0E9;border-radius:var(--r-card);
}
.back-bar p{margin:0;font-size:14.5px;color:#1F433C}
.back-bar p b{color:#0E7A64}
.back-actions{display:flex;gap:12px;flex-wrap:wrap}

/* 目录侧栏 */
.toc-box{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px 18px;box-shadow:var(--sh-1);
}
.toc-box h4{font-size:13px;letter-spacing:1.6px;color:var(--text-3);margin-bottom:14px;font-weight:600}
.toc-list li{margin-bottom:3px}
.toc-link{
  display:block;padding:7px 10px;border-left:2px solid var(--line);
  font-size:13.5px;color:var(--text-2);line-height:1.5;
  transition:all .18s;
}
.toc-link:hover{color:var(--brand-dark);border-left-color:var(--brand);background:var(--brand-tint)}
.toc-link.active{color:var(--brand-dark);border-left-color:var(--brand);background:var(--brand-tint);font-weight:600}
.toc-cta{margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}
.toc-cta p{font-size:12.5px;color:var(--text-3);margin-bottom:12px;line-height:1.7}

/* ---------- 页脚 ---------- */
.footer{background:var(--ink);color:rgba(255,255,255,.66);position:relative;margin-top:auto}
.footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.3;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:36px 36px;
}
.footer .container{position:relative;z-index:1}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px;
  padding:64px 0 44px;
}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand .brand-name{font-size:16px}
.footer-grid p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.55);margin:0;max-width:340px}
.footer h4{font-size:14px;color:#fff;margin-bottom:16px;font-weight:600;letter-spacing:.4px}
.footer-links li{margin-bottom:11px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.58);transition:color .18s,padding-left .18s;display:inline-block}
.footer-links a:hover{color:var(--brand);padding-left:4px}
.footer-contact li{font-size:13.5px;color:rgba(255,255,255,.5);margin-bottom:11px;line-height:1.6}
.footer-contact b{color:rgba(255,255,255,.85);font-weight:600}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 0 28px;border-top:1px solid var(--line-dark);
}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,.42);margin:0}
.to-top{
  width:40px;height:40px;flex:0 0 40px;border-radius:50%;
  border:1px solid rgba(255,255,255,.2);color:rgba(255,255,255,.7);
  display:flex;align-items:center;justify-content:center;font-size:16px;
  transition:all .2s;
}
.to-top:hover{background:var(--brand);border-color:var(--brand);color:#06231D;transform:translateY(-3px)}

/* ---------- 响应式 ---------- */
@media (min-width:1280px){
  .article-shell{display:grid;grid-template-columns:minmax(0,760px) 250px;gap:56px;justify-content:center;align-items:start}
  .article-main{max-width:none;margin:0}
  .article-aside{display:block;position:sticky;top:32px}
}
@media (max-width:1279px) and (min-width:1024px){
  :root{--side:88px}
  .brand-text,.nav-group-title,.nav-item span{display:none}
  .brand{justify-content:center;padding:0}
  .nav-item{justify-content:center;padding:0;gap:0}
  .nav-item.active::before{display:none}
  .sidebar-foot{display:none}
  .collapse-btn{display:none}
  .article-head h1{font-size:30px}
}
@media (max-width:1023px){
  .sidebar-foot .btn{height:40px;font-size:14px}
  .rel-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  :root{--nav-h:56px}
  .sidebar{width:280px;transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0)}
  .sidebar .brand-text,.sidebar .nav-group-title,.sidebar .nav-item span{display:flex}
  .sidebar .nav-item{justify-content:flex-start;padding:0 12px}
  .sidebar .sidebar-foot{display:flex}
  .sidebar.is-collapsed{width:280px}
  .page{margin-left:0;padding-top:var(--nav-h)}
  .page.wide{margin-left:0}
  .mobile-bar{display:flex}
  .collapse-btn{display:none}
  .container{padding:0 16px}
  .section{padding:56px 0}
  .article-wrap{padding:28px 0 52px}
  .article-head h1{font-size:26px}
  .article-lead{font-size:15.5px}
  .article-body{font-size:16px;margin-top:24px}
  .article-body > p:first-child{font-size:17px}
  .article-body h2{font-size:21px;margin-top:34px}
  .article-body h3{font-size:17.5px}
  .rel-grid{grid-template-columns:1fr}
  .pn-grid{grid-template-columns:1fr}
  .pn-card.next{flex-direction:row;text-align:left}
  .pn-card.next .pn-text{align-items:flex-start}
  .footer-grid{grid-template-columns:1fr;gap:26px;padding:44px 0 32px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:14px}
  .back-bar{flex-direction:column;align-items:flex-start}
  .article-meta{gap:6px 14px}
  .article-meta .dot{display:none}
}
@media (max-width:479px){
  .article-head h1{font-size:23px}
  .rel-head{flex-direction:column;align-items:flex-start}
  .back-actions{width:100%}
  .back-actions .btn{flex:1 1 auto}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}

/* roulang page: category1 */
:root{
  --ink:#0E1516;
  --ink-2:#14201F;
  --paper:#F4F6F5;
  --card:#FFFFFF;
  --brand:#14C8A6;
  --brand-d:#0E9E84;
  --brand-l:#E6FAF5;
  --heat:#FF7A45;
  --violet:#6C4CE0;
  --text:#16211F;
  --text-2:#55635F;
  --text-3:#8A9793;
  --line:#E3E9E7;
  --line-d:rgba(255,255,255,.08);
  --ok:#1F9D6B;
  --warn:#E0A32E;
  --err:#D8543F;
  --info:#3A7BD5;
  --r-card:12px;
  --r-btn:10px;
  --r-img:16px;
  --shadow:0 1px 2px rgba(16,33,31,.06),0 8px 24px -12px rgba(16,33,31,.18);
  --shadow-lg:0 2px 6px rgba(16,33,31,.07),0 20px 42px -20px rgba(16,33,31,.28);
  --side:248px;
}
*,*::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","Noto Sans SC",sans-serif;
  font-size:16.5px;
  line-height:1.85;
  color:var(--text);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;color:var(--text)}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

/* ---------- 布局骨架 ---------- */
.layout{min-height:100vh}
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--side);
  background:var(--ink);color:#fff;z-index:60;
  display:flex;flex-direction:column;
  border-right:1px solid var(--line-d);
  transition:width .25s ease,transform .25s ease;
}
.main{
  margin-left:var(--side);
  min-height:100vh;display:flex;flex-direction:column;
  background:var(--paper);
  transition:margin-left .25s ease;
}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 40px}

/* ---------- 侧栏 ---------- */
.brand{display:flex;align-items:center;gap:10px;height:72px;padding:0 18px;flex:0 0 auto;border-bottom:1px solid var(--line-d)}
.brand-mark{
  width:36px;height:36px;flex:0 0 auto;display:grid;place-items:center;
  font-size:17px;font-weight:800;color:#04231D;
  background:linear-gradient(135deg,var(--brand),var(--brand-d));
  clip-path:polygon(8px 0,100% 0,100% 100%,0 100%,0 8px);
}
.brand-text{display:flex;flex-direction:column;min-width:0}
.brand-name{font-size:15px;font-weight:700;color:#fff;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand-desc{font-size:12px;color:rgba(255,255,255,.48);letter-spacing:.04em}
.collapse-btn{
  position:absolute;top:24px;right:-13px;width:26px;height:26px;border-radius:8px;
  background:var(--ink-2);border:1px solid var(--line-d);color:rgba(255,255,255,.7);
  font-size:14px;line-height:1;cursor:pointer;display:grid;place-items:center;z-index:5;
  transition:.2s;
}
.collapse-btn:hover{background:var(--brand);color:#04231D;border-color:transparent}
.nav-scroll{flex:1 1 auto;overflow-y:auto;padding:16px 12px}
.nav-scroll::-webkit-scrollbar{width:6px}
.nav-scroll::-webkit-scrollbar-thumb{background:rgba(255,255,255,.14);border-radius:3px}
.nav-group-title{font-size:12px;color:rgba(255,255,255,.36);letter-spacing:.1em;margin:0 0 10px 10px}
.nav-item{
  position:relative;display:flex;align-items:center;gap:10px;height:44px;padding:0 12px;
  border-radius:10px;color:rgba(255,255,255,.72);font-size:15px;margin-bottom:4px;
  transition:background .2s,color .2s;
}
.nav-item .ic{width:18px;height:18px;flex:0 0 auto}
.nav-item:hover{background:rgba(255,255,255,.06);color:#fff}
.nav-item.active{background:rgba(20,200,166,.12);color:#EAFBF7}
.nav-item.active::before{content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:2px;background:var(--brand)}
.sidebar-foot{padding:14px 12px 18px;border-top:1px solid var(--line-d);display:grid;gap:10px;flex:0 0 auto}
.btn-mini{display:none}

.layout.collapsed .sidebar{width:88px}
.layout.collapsed .main{margin-left:88px}
.layout.collapsed .brand-text,
.layout.collapsed .nav-group-title,
.layout.collapsed .nav-item span,
.layout.collapsed .btn-full{display:none}
.layout.collapsed .nav-item{justify-content:center;padding:0}
.layout.collapsed .brand{justify-content:center;padding:0}
.layout.collapsed .btn-mini{display:inline}
.layout.collapsed .sidebar-foot .btn{padding:0;height:44px}
.layout.collapsed .collapse-btn{transform:rotate(180deg)}

/* ---------- 移动端导航 ---------- */
.mobile-bar{
  display:none;position:fixed;top:0;left:0;right:0;height:56px;z-index:70;
  align-items:center;justify-content:space-between;padding:0 16px;
  background:rgba(14,21,22,.98);border-bottom:1px solid var(--line-d);
}
.mobile-bar .brand-mark{width:30px;height:30px;font-size:15px}
.mobile-bar .m-name{font-size:15px;font-weight:700;color:#fff;margin-left:9px}
.mobile-brand{display:flex;align-items:center;min-width:0}
.burger{width:40px;height:40px;border:1px solid var(--line-d);border-radius:10px;background:transparent;display:grid;place-items:center;gap:4px;cursor:pointer;padding:0}
.burger i{display:block;width:17px;height:2px;background:#fff;border-radius:2px;transition:.2s}
.burger:hover{border-color:rgba(255,255,255,.32)}

/* ---------- 通用按钮 / 标签 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:background .2s,color .2s,transform .12s,box-shadow .2s,border-color .2s;
  white-space:nowrap;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);color:#04231D;box-shadow:0 10px 26px -14px rgba(20,200,166,.85)}
.btn-primary:hover{background:var(--brand-d);color:#fff}
.btn-ghost{border-color:rgba(255,255,255,.24);color:#fff;background:transparent}
.btn-ghost:hover{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.44)}
.btn-outline{border-color:var(--line);background:#fff;color:var(--text)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand-d);background:var(--brand-l)}
.btn-block{width:100%}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:6px;
  background:var(--brand-l);color:var(--brand-d);font-size:12.5px;font-weight:600;
}
.tag-rec{
  display:inline-block;margin-left:8px;padding:2px 9px;font-size:11px;font-weight:700;
  color:#fff;background:var(--heat);
  clip-path:polygon(7px 0,100% 0,100% 100%,0 100%,0 7px);
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;
  letter-spacing:.12em;color:var(--brand-d);text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--brand);border-radius:2px}
.on-dark .eyebrow{color:var(--brand)}
.on-dark .eyebrow::before{background:var(--brand)}

/* ---------- 页面首屏 ---------- */
.page-hero{
  position:relative;color:#fff;overflow:hidden;
  background:
    linear-gradient(115deg,rgba(9,15,16,.95) 0%,rgba(13,28,26,.86) 52%,rgba(8,20,19,.94) 100%),
    url(/assets/images/backpic/back-2.webp) center/cover no-repeat;
  padding:44px 0 30px;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:36px 36px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),rgba(0,0,0,0));
}
.page-hero .container{position:relative;z-index:2}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.58);margin-bottom:20px}
.crumb a:hover{color:#fff}
.crumb .sep{color:rgba(255,255,255,.28)}
.hero-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:40px;align-items:center;padding-bottom:26px}
.page-hero h1{font-size:36px;color:#fff;letter-spacing:-.01em;margin-bottom:14px}
.page-hero .lead{font-size:16.5px;color:rgba(255,255,255,.74);max-width:620px;margin-bottom:24px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.hero-card{
  background:linear-gradient(180deg,rgba(20,32,31,.95),rgba(11,20,20,.95));
  border:1px solid var(--line-d);border-radius:var(--r-card);padding:22px;
  box-shadow:0 24px 50px -30px rgba(0,0,0,.9);
}
.hero-card .hc-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.hero-card .hc-label{font-size:13px;color:rgba(255,255,255,.55)}
.hero-card .hc-name{font-size:19px;font-weight:700;color:#fff;margin-bottom:12px}
.energy{height:6px;border-radius:4px;background:rgba(255,255,255,.1);overflow:hidden}
.energy i{display:block;height:100%;border-radius:4px;background:linear-gradient(90deg,var(--brand),var(--heat))}
.hero-card .energy{margin-bottom:16px}
.hero-points{display:grid;gap:10px}
.hero-points li{display:flex;align-items:center;gap:10px;font-size:14.5px;color:rgba(255,255,255,.78)}
.dot{width:6px;height:6px;border-radius:2px;background:var(--brand);flex:0 0 auto}

/* ---------- 数据条 ---------- */
.stats-wrap{margin-top:-46px;position:relative;z-index:3}
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow);overflow:hidden;
}
.stat{padding:22px 24px;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat .num{font-size:26px;font-weight:800;color:var(--ink);letter-spacing:-.02em;line-height:1.2}
.stat .num small{font-size:14px;font-weight:600;color:var(--brand-d);margin-left:4px}
.stat .lb{font-size:13.5px;color:var(--text-3);margin-top:4px}

/* ---------- 板块 ---------- */
.sec{padding:84px 0}
.sec.tight{padding:64px 0}
.sec-head{max-width:780px;margin-bottom:36px}
.sec-head h2{font-size:26px;margin-bottom:12px}
.sec-head p{color:var(--text-2);font-size:16px}
.sec-head.row{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;max-width:none}

/* ---------- 对比表 ---------- */
.table-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow);overflow:hidden}
.table-scroll{overflow-x:auto}
.compare-table{width:100%;border-collapse:collapse;font-size:15px;min-width:720px}
.compare-table thead th{
  background:var(--brand-l);color:var(--text);font-size:14px;font-weight:700;
  text-align:left;padding:16px 20px;position:sticky;top:0;z-index:2;white-space:nowrap;
}
.compare-table thead th.col-rec{position:relative}
.compare-table thead th.col-rec::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--brand)}
.compare-table tbody th{
  width:26%;text-align:left;font-weight:600;font-size:15px;color:var(--text);
  padding:15px 20px;border-top:1px solid var(--line);background:#fff;
}
.compare-table td{padding:15px 20px;border-top:1px solid var(--line);color:var(--text-2)}
.compare-table tbody tr:nth-child(even) td,
.compare-table tbody tr:nth-child(even) th{background:#FAFCFB}
.compare-table tbody tr:hover td,
.compare-table tbody tr:hover th{background:rgba(20,200,166,.05)}
.compare-table td.col-rec,
.compare-table th.col-rec{background:#F0FBF8}
.compare-table tbody tr:hover td.col-rec{background:#E9F8F4}
.table-foot{padding:16px 20px;border-top:1px solid var(--line);font-size:13.5px;color:var(--text-3);background:#FCFDFD}

/* ---------- 权益卡 ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.bcard{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s;
}
.bcard:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.bcard .idx{font-size:13px;font-weight:800;letter-spacing:.14em;color:var(--text-3)}
.bcard h3{font-size:18px;margin:12px 0 10px}
.bcard .desc{font-size:15px;color:var(--text-2);margin-bottom:16px}
.bcard .energy{margin-bottom:18px}
.bcard ul{display:grid;gap:10px;margin-bottom:20px}
.bcard li{display:flex;gap:10px;font-size:15px;color:var(--text-2)}
.bcard li .dot{margin-top:9px}
.bcard .link{font-size:14.5px;font-weight:600;color:var(--brand-d);display:inline-flex;align-items:center;gap:6px}
.bcard .link:hover{color:var(--brand);gap:10px}
.bcard .link span{transition:transform .2s}

/* ---------- 证据区 ---------- */
.evidence{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.ev-media{position:relative;border-radius:var(--r-img);overflow:hidden;border:1px solid rgba(20,200,166,.25);box-shadow:var(--shadow)}
.ev-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.ev-media .corner{
  position:absolute;top:16px;left:16px;padding:6px 12px;font-size:12.5px;font-weight:700;color:#04231D;
  background:rgba(20,200,166,.92);
  clip-path:polygon(8px 0,100% 0,100% 100%,0 100%,0 8px);
}
.quotes{display:grid;gap:16px}
.quote{
  background:#fff;border:1px solid var(--line);border-left:3px solid var(--brand);
  border-radius:10px;padding:18px 20px;box-shadow:var(--shadow);
}
.quote p{font-size:15.5px;color:var(--text-2);margin-bottom:10px}
.quote .who{font-size:13px;color:var(--text-3)}
.ev-facts{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:24px}
.fact{background:var(--brand-l);border-radius:10px;padding:16px 18px}
.fact b{display:block;font-size:20px;color:var(--ink);line-height:1.4}
.fact span{font-size:13px;color:var(--text-2)}

/* ---------- FAQ ---------- */
.faq{max-width:860px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  margin-bottom:12px;overflow:hidden;transition:box-shadow .25s,border-color .25s;
}
.faq-item.open{border-color:rgba(20,200,166,.55);box-shadow:inset 3px 0 0 var(--brand),var(--shadow)}
.faq-q{
  width:100%;min-height:56px;display:flex;align-items:center;gap:14px;
  padding:14px 20px;background:none;border:0;text-align:left;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--text);line-height:1.5;
}
.plus{
  position:relative;width:24px;height:24px;flex:0 0 auto;border-radius:8px;
  background:var(--brand-l);color:var(--brand-d);display:grid;place-items:center;
}
.plus::before{content:"";position:absolute;width:12px;height:2px;background:currentColor;border-radius:1px}
.plus::after{content:"";position:absolute;width:2px;height:12px;background:currentColor;border-radius:1px;transition:transform .25s}
.faq-item.open .plus::after{transform:scaleY(0)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease}
.faq-item.open .faq-a{max-height:340px}
.faq-a p{padding:0 20px 20px 58px;font-size:15.5px;color:var(--text-2)}

/* ---------- CTA ---------- */
.cta{
  position:relative;color:#fff;overflow:hidden;padding:76px 0;
  background:
    linear-gradient(115deg,rgba(9,16,17,.96) 0%,rgba(12,30,28,.9) 55%,rgba(8,18,18,.96) 100%),
    url(/assets/images/backpic/back-3.webp) center/cover no-repeat;
}
.cta::after{
  content:"";position:absolute;top:-40px;right:-60px;width:320px;height:320px;
  background:rgba(108,76,224,.16);
  clip-path:polygon(100% 0,100% 100%,0 0);
  pointer-events:none;
}
.cta .container{position:relative;z-index:2}
.cta-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.cta h2{font-size:28px;color:#fff;margin-bottom:14px}
.cta .sub{color:rgba(255,255,255,.72);font-size:16px;margin-bottom:24px;max-width:520px}
.cta-list{display:grid;gap:12px}
.cta-list li{display:flex;align-items:center;gap:12px;font-size:15.5px;color:rgba(255,255,255,.84)}
.check{
  width:20px;height:20px;flex:0 0 auto;border-radius:6px;background:rgba(20,200,166,.18);
  border:1px solid rgba(20,200,166,.5);display:grid;place-items:center;font-size:12px;color:var(--brand);
}
.form-card{background:#fff;border-radius:var(--r-img);padding:28px;box-shadow:var(--shadow-lg)}
.form-card h3{font-size:18px;margin-bottom:6px}
.form-card .form-tip{font-size:13.5px;color:var(--text-3);margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;color:var(--text-2);margin-bottom:7px;font-weight:600}
.input{
  width:100%;height:46px;padding:0 14px;border:1px solid var(--line);border-radius:var(--r-btn);
  background:#fff;transition:border-color .2s,box-shadow .2s;
}
.input::placeholder{color:#A9B4B1}
.input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(20,200,166,.18)}
.code-row{display:flex;gap:10px}
.code-row .input{flex:1 1 auto;min-width:0}
.code-btn{
  height:46px;padding:0 16px;border-radius:var(--r-btn);border:1px solid rgba(20,200,166,.45);
  background:var(--brand-l);color:var(--brand-d);font-size:14px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:.2s;
}
.code-btn:hover{background:#D5F5EC}
.code-btn:disabled{opacity:.4;cursor:not-allowed}
.check-row{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--text-2);margin:6px 0 4px;line-height:1.7}
.check-row input{margin-top:3px;width:15px;height:15px;accent-color:var(--brand-d);flex:0 0 auto}
.err{color:var(--err);font-size:13px;min-height:20px;margin:8px 0 0}
.form-note{font-size:12px;color:var(--text-3);margin-top:12px;line-height:1.7}

/* ---------- 页脚 ---------- */
.footer{background:var(--ink);color:rgba(255,255,255,.7);padding:64px 0 26px;margin-top:auto}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:32px;padding-bottom:36px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-name{color:#fff;font-size:16px}
.footer-brand .brand-desc{color:rgba(255,255,255,.45)}
.footer p{font-size:14.5px;color:rgba(255,255,255,.62);line-height:1.85;max-width:360px}
.footer h4{font-size:15px;color:#fff;margin-bottom:16px}
.footer-links li,.footer-contact li{margin-bottom:11px;font-size:14.5px}
.footer-links a{color:rgba(255,255,255,.66);transition:color .2s}
.footer-links a:hover{color:var(--brand)}
.footer-contact li{color:rgba(255,255,255,.6)}
.footer-contact b{color:#fff;font-weight:600}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  border-top:1px solid var(--line-d);padding-top:22px;flex-wrap:wrap;
}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,.46);margin:0;max-width:none}
.to-top{
  width:40px;height:40px;flex:0 0 auto;border-radius:50%;border:1px solid rgba(255,255,255,.24);
  display:grid;place-items:center;color:#fff;font-size:16px;transition:.2s;
}
.to-top:hover{background:var(--brand);color:#04231D;border-color:transparent}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .sidebar{width:88px}
  .main{margin-left:88px}
  .sidebar .brand-text,
  .sidebar .nav-group-title,
  .sidebar .nav-item span,
  .sidebar .btn-full{display:none}
  .sidebar .nav-item{justify-content:center;padding:0}
  .sidebar .brand{justify-content:center;padding:0}
  .sidebar .btn-mini{display:inline}
  .sidebar .sidebar-foot .btn{padding:0;height:44px}
  .hero-grid{grid-template-columns:1fr 1fr;gap:32px}
  .page-hero h1{font-size:32px}
}
@media (max-width:1023px){
  .container{padding:0 24px}
  .sec{padding:66px 0}
  .grid-3{grid-template-columns:1fr;gap:20px}
  .evidence{grid-template-columns:1fr;gap:28px}
  .cta-grid{grid-template-columns:1fr;gap:32px}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2){border-right:0}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  body{font-size:16px}
  .mobile-bar{display:flex}
  .main{margin-left:0;padding-top:56px}
  .sidebar{
    top:56px;width:100%;height:calc(100vh - 56px);
    background:rgba(10,18,19,.96);border-right:0;
    opacity:0;transform:translateY(-10px);pointer-events:none;
  }
  .sidebar.open{opacity:1;transform:none;pointer-events:auto}
  .sidebar .brand{height:auto;padding:20px 18px;border-bottom:1px solid var(--line-d);justify-content:flex-start}
  .sidebar .brand-text,
  .sidebar .nav-group-title,
  .sidebar .nav-item span,
  .sidebar .btn-full{display:block}
  .sidebar .brand-text{display:flex}
  .sidebar .nav-item{justify-content:flex-start;padding:0 12px}
  .sidebar .btn-mini{display:none}
  .sidebar .sidebar-foot .btn{padding:0 24px;height:48px}
  .collapse-btn{display:none}
  .container{padding:0 16px}
  .page-hero{padding:28px 0 26px}
  .page-hero h1{font-size:26px}
  .page-hero .lead{font-size:15.5px}
  .hero-grid{grid-template-columns:1fr;gap:24px;padding-bottom:20px}
  .hero-actions .btn{flex:1 1 100%}
  .stats-wrap{margin-top:-30px}
  .stats{grid-template-columns:1fr}
  .stat{border-right:0;border-bottom:1px solid var(--line)}
  .stat:last-child{border-bottom:0}
  .sec{padding:56px 0}
  .sec-head h2{font-size:21px}
  .sec-head.row{flex-direction:column;align-items:flex-start}
  .cta{padding:56px 0}
  .cta h2{font-size:22px}
  .form-card{padding:22px}
  .footer{padding:48px 0 22px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .faq-a p{padding:0 18px 18px 18px}
  .faq-q{font-size:15.5px;padding:12px 16px}

  /* 表格转卡片 */
  .compare-table{min-width:0;display:block;font-size:15px}
  .compare-table thead{display:none}
  .compare-table tbody{display:block}
  .compare-table tbody tr{
    display:block;padding:8px 16px 14px;border-top:1px solid var(--line);
  }
  .compare-table tbody tr:first-child{border-top:0}
  .compare-table tbody th{
    display:block;width:100%;padding:12px 0 8px;border-top:0;background:transparent !important;
    font-size:15px;color:var(--ink);
  }
  .compare-table tbody td{
    display:flex;justify-content:space-between;gap:16px;padding:8px 0;border-top:0;
    background:transparent !important;font-size:14.5px;
  }
  .compare-table tbody td::before{
    content:attr(data-label);color:var(--text-3);font-size:13.5px;flex:0 0 auto;
  }
  .compare-table tbody tr:nth-child(even){background:#FAFCFB}
  .compare-table tbody tr:nth-child(even) td::before{color:var(--text-3)}
}
@media (max-width:519px){
  .stat{padding:18px 16px}
  .stat .num{font-size:22px}
  .bcard{padding:20px}
  .hero-card{padding:18px}
  .ev-facts{grid-template-columns:1fr}
  .code-row{flex-direction:column}
  .code-btn{width:100%}
  .btn{height:46px;padding:0 18px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important}
}

/* roulang page: category2 */
:root{
  --ink:#0E1516;
  --ink-2:#14201F;
  --paper:#F4F6F5;
  --card:#FFFFFF;
  --brand:#14C8A6;
  --brand-dark:#0E9E84;
  --brand-soft:#E6FAF5;
  --heat:#FF7A45;
  --violet:#6C4CE0;
  --text:#16211F;
  --text-2:#55635F;
  --text-3:#8A9793;
  --line:#E3E9E7;
  --line-ink:rgba(255,255,255,.08);
  --ok:#1F9D6B;
  --warn:#E0A32E;
  --err:#D8543F;
  --r-card:12px;
  --r-btn:10px;
  --r-img:16px;
  --r-tag:8px;
  --sh-1:0 1px 2px rgba(16,33,31,.06), 0 8px 24px -12px rgba(16,33,31,.18);
  --sh-2:0 2px 4px rgba(16,33,31,.08), 0 16px 34px -14px rgba(16,33,31,.26);
  --sp:88px;
  --nav-w:248px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16.5px;
  line-height:1.85;
  color:var(--text);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}

/* ============ 左侧竖向导航 ============ */
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--nav-w);
  background:var(--ink);
  border-right:1px solid var(--line-ink);
  display:flex;
  flex-direction:column;
  z-index:60;
  transition:width .26s var(--ease);
}
.sidebar::after{
  content:"";
  position:absolute;
  top:0;right:0;
  width:120px;height:120px;
  background:linear-gradient(225deg,rgba(20,200,166,.10),transparent 70%);
  clip-path:polygon(100% 0,100% 100%,0 0);
  pointer-events:none;
}
.brand{
  height:72px;
  display:flex;
  align-items:center;
  gap:12px;
  padding:0 18px;
  border-bottom:1px solid var(--line-ink);
  flex:0 0 auto;
}
.brand-mark{
  width:38px;height:38px;
  flex:0 0 38px;
  display:grid;place-items:center;
  border-radius:10px;
  background:linear-gradient(140deg,var(--brand),var(--brand-dark));
  color:#06231d;
  font-weight:800;
  font-size:19px;
  box-shadow:0 6px 16px -8px rgba(20,200,166,.9);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;overflow:hidden}
.brand-name{color:#fff;font-weight:700;font-size:15px;white-space:nowrap}
.brand-desc{color:var(--text-3);font-size:12px;white-space:nowrap}
.collapse-btn{
  position:absolute;
  top:82px;right:-11px;
  width:22px;height:22px;
  border-radius:50%;
  background:var(--ink-2);
  border:1px solid var(--line-ink);
  color:var(--text-3);
  font-size:13px;line-height:1;
  display:grid;place-items:center;
  z-index:2;
  transition:transform .26s var(--ease),color .2s;
}
.collapse-btn:hover{color:var(--brand)}
.nav-scroll{
  flex:1 1 auto;
  overflow-y:auto;
  padding:18px 12px 8px;
}
.nav-group-title{
  color:var(--text-3);
  font-size:12px;
  letter-spacing:.08em;
  padding:0 10px 10px;
}
.nav-item{
  display:flex;
  align-items:center;
  gap:10px;
  height:44px;
  padding:0 10px;
  border-radius:9px;
  color:#C8D3D0;
  font-size:15px;
  position:relative;
  transition:background .2s,color .2s;
}
.nav-item .ic{width:18px;height:18px;flex:0 0 18px;color:var(--brand);opacity:.9}
.nav-item span{white-space:nowrap;overflow:hidden}
.nav-item:hover{background:rgba(255,255,255,.06);color:#fff}
.nav-item.active{background:rgba(20,200,166,.10);color:#fff;font-weight:600}
.nav-item.active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;
  border-radius:0 3px 3px 0;background:var(--brand);
}
.sidebar-foot{
  flex:0 0 auto;
  padding:14px 14px 18px;
  border-top:1px solid var(--line-ink);
  display:flex;flex-direction:column;gap:10px;
}
.sidebar-foot .btn{width:100%}

/* 折叠态／中屏图标栏 */
.sidebar.collapsed{width:88px}
.sidebar.collapsed .brand{justify-content:center;padding:0}
.sidebar.collapsed .brand-text{display:none}
.sidebar.collapsed .nav-group-title{display:none}
.sidebar.collapsed .nav-item{justify-content:center;padding:0}
.sidebar.collapsed .nav-item span{display:none}
.sidebar.collapsed .sidebar-foot .btn span{display:none}
.sidebar.collapsed .sidebar-foot .btn{padding:0;justify-content:center}
.sidebar.collapsed .collapse-btn{transform:rotate(180deg)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 22px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  letter-spacing:.01em;
  border:1px solid transparent;
  position:relative;
  overflow:hidden;
  transition:transform .16s var(--ease),background .2s,box-shadow .2s,color .2s,border-color .2s;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);color:#06231d;box-shadow:0 10px 24px -14px rgba(20,200,166,.95)}
.btn-primary:hover{background:var(--brand-dark);color:#fff}
.btn-ghost{background:transparent;color:#DCE6E4;border-color:rgba(255,255,255,.22)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);background:rgba(20,200,166,.08)}
.btn-outline{background:transparent;color:var(--brand-dark);border-color:rgba(20,200,166,.42)}
.btn-outline:hover{background:var(--brand-soft);border-color:var(--brand)}
.btn-soft{background:var(--brand-soft);color:var(--brand-dark);height:42px;padding:0 14px;font-size:14px;border:1px solid rgba(20,200,166,.28)}
.btn-soft:hover{background:#D7F5EE}
.btn-block{width:100%;height:48px}
.btn-lg{height:48px;padding:0 26px}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none}

/* ============ 布局 ============ */
.main-wrap{margin-left:var(--nav-w);min-height:100vh;display:flex;flex-direction:column;transition:margin-left .26s var(--ease)}
body.nav-collapsed .main-wrap{margin-left:88px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 40px}
.section{padding:var(--sp) 0}
.section-tight{padding:64px 0}
.section-head{max-width:720px;margin-bottom:36px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--brand-dark);font-weight:600;
  letter-spacing:.06em;margin-bottom:14px;
}
.eyebrow::before{content:"";width:20px;height:2px;background:var(--brand);border-radius:2px}
h1{font-size:38px;line-height:1.25;font-weight:700;letter-spacing:-.01em}
h2{font-size:26px;line-height:1.35;font-weight:700}
h3{font-size:18px;line-height:1.5;font-weight:600}
.lead{font-size:17px;color:var(--text-2);line-height:1.8}
.muted{color:var(--text-2)}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:var(--r-tag);
  background:var(--brand-soft);color:var(--brand-dark);
  font-size:12.5px;font-weight:600;white-space:nowrap;
}
.badge-slant{
  display:inline-flex;align-items:center;height:24px;padding:0 12px 0 14px;
  background:linear-gradient(135deg,var(--heat),#FF9A6E);
  color:#3A1505;font-size:12.5px;font-weight:700;
  clip-path:polygon(8px 0,100% 0,100% 100%,0 100%,0 8px);
}
.badge-slant.violet{background:linear-gradient(135deg,var(--violet),#8F76F0);color:#fff}
.badge-slant.brand{background:linear-gradient(135deg,var(--brand),#5FE2C8);color:#06231d}

/* ============ 面包屑 ============ */
.crumb-bar{
  background:var(--ink);
  border-bottom:1px solid var(--line-ink);
}
.crumb{
  display:flex;align-items:center;gap:8px;
  padding:14px 0;
  font-size:13px;color:var(--text-3);
}
.crumb a{color:#A9B6B3;transition:color .2s}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:rgba(255,255,255,.22)}
.crumb .cur{color:#DCE6E4}

/* ============ Hero ============ */
.hero{
  position:relative;
  background:var(--ink) url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
  color:#fff;
  overflow:hidden;
  min-height:240px;
}
.hero::before{
  content:"";
  position:absolute;inset:0;
  background:
    linear-gradient(100deg,rgba(14,21,22,.96) 0%,rgba(14,21,22,.86) 46%,rgba(14,21,22,.62) 100%),
    linear-gradient(0deg,rgba(20,200,166,.06),rgba(20,200,166,.06));
}
.hero::after{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:56px 56px;
  opacity:.5;
  pointer-events:none;
}
.hero .container{position:relative;z-index:2;padding-top:56px;padding-bottom:56px}
.hero-grid{display:grid;grid-template-columns:1.55fr .95fr;gap:40px;align-items:center}
.hero h1{color:#fff;margin-bottom:16px}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero-sub{font-size:17px;color:#C4D1CE;max-width:560px;line-height:1.8}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-panel{
  border:1px solid var(--line-ink);
  background:rgba(20,32,31,.72);
  border-radius:var(--r-card);
  padding:22px;
  box-shadow:var(--sh-1);
}
.hero-panel h3{color:#fff;margin-bottom:14px;font-size:16px}
.hero-steps{display:flex;flex-direction:column;gap:14px}
.hero-step{display:flex;gap:12px;align-items:flex-start}
.hero-step .num{
  width:26px;height:26px;flex:0 0 26px;border-radius:var(--r-tag);
  display:grid;place-items:center;
  background:rgba(20,200,166,.14);color:var(--brand);
  font-size:13px;font-weight:700;
}
.hero-step p{font-size:14px;color:#B9C6C3;line-height:1.7}
.hero-step b{color:#fff;display:block;font-size:14.5px;font-weight:600}

/* ============ 阶梯主体 ============ */
.ladder-layout{display:grid;grid-template-columns:236px 1fr;gap:48px;align-items:start}
.ladder-aside{position:sticky;top:32px}
.aside-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:20px;
  box-shadow:var(--sh-1);
}
.aside-card h3{font-size:15px;margin-bottom:14px;color:var(--text)}
.aside-list{display:flex;flex-direction:column;gap:2px}
.aside-list a{
  display:flex;align-items:center;gap:10px;
  padding:9px 10px;
  border-radius:8px;
  font-size:14.5px;
  color:var(--text-2);
  border-left:3px solid transparent;
  transition:background .2s,color .2s,border-color .2s;
}
.aside-list a:hover{background:var(--brand-soft);color:var(--brand-dark)}
.aside-list a.on{background:var(--brand-soft);color:var(--brand-dark);border-left-color:var(--brand);font-weight:600}
.aside-list i{
  width:20px;height:20px;flex:0 0 20px;border-radius:6px;
  background:#EEF3F1;color:var(--text-3);
  font-size:11.5px;font-style:normal;font-weight:700;
  display:grid;place-items:center;
}
.aside-list a.on i{background:var(--brand);color:#06231d}
.aside-tip{
  margin-top:18px;padding-top:16px;border-top:1px dashed var(--line);
  font-size:13px;color:var(--text-3);line-height:1.7;
}

.timeline{position:relative;padding:8px 0}
.timeline::before{
  content:"";
  position:absolute;left:50%;top:0;bottom:0;width:2px;
  margin-left:-1px;
  background:linear-gradient(180deg,rgba(20,200,166,.05),rgba(20,200,166,.35),rgba(20,200,166,.05));
}
.tl-item{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:0;padding:18px 0}
.tl-item::after{
  content:"";
  position:absolute;left:50%;top:44px;
  width:14px;height:14px;margin-left:-7px;
  border-radius:50%;
  background:var(--brand);
  border:3px solid var(--paper);
  box-shadow:0 0 0 3px rgba(20,200,166,.18);
}
.tl-side{display:flex}
.tl-side:first-child{justify-content:flex-end;padding-right:44px}
.tl-side:last-child{justify-content:flex-start;padding-left:44px}
.tl-card{
  width:100%;
  max-width:430px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:22px;
  box-shadow:var(--sh-1);
  position:relative;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s;
}
.tl-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(20,200,166,.4)}
.tl-card::before{
  content:"";
  position:absolute;left:0;top:0;width:0;height:0;
  border-top:16px solid var(--brand-soft);
  border-right:16px solid transparent;
  border-radius:var(--r-card) 0 0 0;
}
.tl-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:12px}
.tl-head h3{font-size:18px}
.tl-card.recommend{background:#F0FBF8;border-color:rgba(20,200,166,.4)}
.tl-card.recommend::after{
  content:"";position:absolute;left:0;right:0;top:0;height:4px;
  background:var(--brand);border-radius:var(--r-card) var(--r-card) 0 0;
}
.energy{height:8px;border-radius:6px;background:#EDF2F0;overflow:hidden;margin:12px 0 6px}
.energy span{display:block;height:100%;border-radius:6px;background:linear-gradient(90deg,var(--brand),var(--heat))}
.energy-meta{display:flex;justify-content:space-between;font-size:12.5px;color:var(--text-3);margin-bottom:14px}
.tl-list{display:flex;flex-direction:column;gap:9px;margin-bottom:14px}
.tl-list li{position:relative;padding-left:18px;font-size:14.5px;color:var(--text-2);line-height:1.7}
.tl-list li::before{
  content:"";position:absolute;left:0;top:9px;
  width:6px;height:6px;border-radius:1px;background:var(--brand);
}
.tl-note{font-size:13.5px;color:var(--text-3);border-top:1px dashed var(--line);padding-top:12px}

/* ============ 成长值来源 ============ */
.gain-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.gain-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:22px;
  box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.gain-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.gain-icon{
  width:42px;height:42px;border-radius:10px;
  display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand-dark);
  margin-bottom:14px;
}
.gain-icon svg{width:22px;height:22px}
.gain-card h3{font-size:16.5px;margin-bottom:8px}
.gain-card p{font-size:14px;color:var(--text-2);line-height:1.75}
.gain-val{
  margin-top:14px;font-size:13px;color:var(--brand-dark);
  background:var(--brand-soft);border-radius:var(--r-tag);
  padding:6px 10px;display:inline-block;font-weight:600;
}

/* ============ 说明条 ============ */
.note-band{
  background:var(--ink);
  color:#fff;
  border-radius:var(--r-card);
  padding:32px 36px;
  display:grid;
  grid-template-columns:1fr auto;
  gap:28px;
  align-items:center;
  position:relative;
  overflow:hidden;
}
.note-band::after{
  content:"";position:absolute;right:-40px;top:-60px;
  width:220px;height:220px;
  background:radial-gradient(circle,rgba(20,200,166,.22),transparent 65%);
  pointer-events:none;
}
.note-band h3{color:#fff;font-size:20px;margin-bottom:10px}
.note-band p{color:#B9C6C3;font-size:15px;max-width:640px;line-height:1.8}
.note-stats{display:flex;gap:28px;position:relative;z-index:2}
.note-stat b{display:block;font-size:26px;font-weight:700;color:var(--brand);line-height:1.2}
.note-stat span{font-size:13px;color:var(--text-3)}

/* ============ FAQ ============ */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-item{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .2s,box-shadow .2s;
}
.faq-item:hover{border-color:rgba(20,200,166,.4)}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  padding:0 22px;
  min-height:56px;
  display:flex;
  align-items:center;
  gap:14px;
  font-size:16px;
  font-weight:600;
  color:var(--text);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .plus{
  width:24px;height:24px;flex:0 0 24px;border-radius:8px;
  background:var(--brand-soft);color:var(--brand-dark);
  display:grid;place-items:center;
  font-size:16px;font-weight:700;line-height:1;
  transition:transform .22s var(--ease),background .2s;
}
.faq-item[open] summary .plus{transform:rotate(45deg);background:var(--brand);color:#06231d}
.faq-item[open]{box-shadow:var(--sh-1);border-left:3px solid var(--brand)}
.faq-body{padding:0 22px 20px 60px;color:var(--text-2);font-size:15px;line-height:1.85}

/* ============ CTA ============ */
.cta-band{
  background:var(--ink);
  color:#fff;
  position:relative;
  overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:64px 64px;
}
.cta-band::after{
  content:"";position:absolute;right:-80px;bottom:-100px;
  width:340px;height:340px;
  background:conic-gradient(from 200deg,rgba(255,122,69,.18),transparent 55%);
  clip-path:polygon(100% 0,100% 100%,0 100%);
  pointer-events:none;
}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.cta-band h2{color:#fff;margin-bottom:14px}
.cta-desc{color:#B9C6C3;font-size:15.5px;max-width:520px;line-height:1.85}
.cta-checks{display:flex;flex-direction:column;gap:11px;margin-top:24px}
.cta-checks li{display:flex;align-items:center;gap:10px;font-size:15px;color:#DCE6E4}
.cta-checks svg{width:18px;height:18px;flex:0 0 18px;color:var(--brand)}
.cta-form{
  background:#fff;
  border-radius:var(--r-img);
  padding:26px;
  box-shadow:0 26px 50px -24px rgba(0,0,0,.6);
}
.cta-form h3{font-size:18px;margin-bottom:6px}
.form-sub{font-size:13.5px;color:var(--text-3);margin-bottom:18px}
.field{margin-bottom:14px}
.field label{display:block;font-size:13.5px;color:var(--text-2);margin-bottom:7px;font-weight:600}
.field input[type=text]{
  width:100%;height:46px;padding:0 14px;
  border:1px solid var(--line);border-radius:var(--r-btn);
  background:#FBFDFC;font-size:15px;color:var(--text);
  transition:border-color .2s,box-shadow .2s,background .2s;
}
.field input[type=text]::placeholder{color:#A9B6B3}
.field input[type=text]:focus{outline:none;border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(20,200,166,.16)}
.code-row{display:flex;gap:10px}
.code-row input{flex:1 1 auto;min-width:0}
.check{display:flex;align-items:flex-start;gap:9px;font-size:13.5px;color:var(--text-2);margin:16px 0 18px;line-height:1.6}
.check input{margin-top:4px;width:16px;height:16px;accent-color:var(--brand);flex:0 0 16px}
.form-note{margin-top:14px;font-size:12px;color:var(--text-3);line-height:1.7}

/* ============ 页脚 ============ */
.footer{background:var(--ink);color:#B9C6C3;margin-top:auto}
.footer .container{padding-top:64px;padding-bottom:22px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand .brand-name{color:#fff;font-weight:700;font-size:16px}
.footer-brand .brand-desc{color:var(--text-3);font-size:12.5px}
.footer p{font-size:14px;line-height:1.8;color:#93A19E;max-width:340px}
.footer h4{color:#fff;font-size:15px;margin-bottom:16px;font-weight:600}
.footer-links li{margin-bottom:10px}
.footer-links a{font-size:14px;color:#A9B6B3;transition:color .2s,padding-left .2s}
.footer-links a:hover{color:var(--brand);padding-left:4px}
.footer-contact li{font-size:14px;color:#93A19E;margin-bottom:10px}
.footer-contact b{color:#DCE6E4;font-weight:600}
.footer-bottom{
  margin-top:44px;padding-top:20px;
  border-top:1px solid var(--line-ink);
  display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.footer-bottom p{font-size:13px;color:#7E8C89;max-width:none}
.to-top{
  width:40px;height:40px;flex:0 0 40px;
  border-radius:50%;
  border:1px solid rgba(255,255,255,.2);
  display:grid;place-items:center;
  color:#DCE6E4;font-size:16px;
  transition:background .2s,border-color .2s,color .2s,transform .2s;
}
.to-top:hover{background:rgba(20,200,166,.14);border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}

/* ============ 移动端顶栏 / 抽屉 ============ */
.topbar{
  display:none;
  position:fixed;top:0;left:0;right:0;height:56px;
  background:rgba(14,21,22,.96);
  border-bottom:1px solid var(--line-ink);
  align-items:center;justify-content:space-between;
  padding:0 16px;z-index:70;
  backdrop-filter:saturate(140%) blur(6px);
}
.topbar .brand{padding:0;border:0;height:auto;gap:10px}
.burger{
  width:40px;height:40px;border-radius:10px;
  border:1px solid rgba(255,255,255,.18);
  display:grid;place-items:center;gap:4px;
}
.burger span{display:block;width:17px;height:2px;background:#DCE6E4;border-radius:2px;transition:transform .2s,opacity .2s}
.drawer{
  position:fixed;inset:0;z-index:80;
  background:rgba(10,16,17,.94);
  padding:20px 18px 26px;
  display:flex;flex-direction:column;
  transform:translateX(-100%);
  transition:transform .28s var(--ease);
  overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-close{width:40px;height:40px;border-radius:10px;border:1px solid rgba(255,255,255,.18);color:#DCE6E4;font-size:18px;display:grid;place-items:center}
.drawer .nav-item{height:48px;font-size:16px}
.drawer-foot{margin-top:auto;display:flex;flex-direction:column;gap:10px;padding-top:22px}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  :root{--nav-w:88px}
  .sidebar .brand{justify-content:center;padding:0}
  .sidebar .brand-text{display:none}
  .sidebar .nav-group-title{display:none}
  .sidebar .nav-item{justify-content:center;padding:0}
  .sidebar .nav-item span{display:none}
  .sidebar .sidebar-foot .btn{padding:0;justify-content:center}
  .sidebar .sidebar-foot .btn span{display:none}
  .sidebar .collapse-btn{display:none}
  .ladder-layout{grid-template-columns:200px 1fr;gap:36px}
  .gain-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1023px){
  .hero-grid{grid-template-columns:1fr;gap:28px}
  .hero-panel{max-width:560px}
  .ladder-layout{grid-template-columns:1fr;gap:28px}
  .ladder-aside{position:static}
  .aside-list{flex-direction:row;flex-wrap:wrap}
  .aside-list a{flex:0 0 auto;border-left:0;border:1px solid var(--line);padding:7px 12px}
  .aside-list a.on{border-color:var(--brand)}
  .cta-inner{grid-template-columns:1fr;gap:32px}
  .note-band{grid-template-columns:1fr;gap:20px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  body{font-size:16px;padding-top:56px}
  h1{font-size:26px}
  h2{font-size:21px}
  :root{--sp:56px}
  .container{padding:0 16px}
  .sidebar{display:none}
  .topbar{display:flex}
  .main-wrap{margin-left:0!important}
  .hero{min-height:auto}
  .hero .container{padding-top:40px;padding-bottom:44px}
  .hero-actions{gap:12px}
  .hero-actions .btn{flex:1 1 100%}
  .tl-item{grid-template-columns:1fr;padding:14px 0 14px 44px}
  .timeline::before{left:14px}
  .tl-item::after{left:14px;top:34px}
  .tl-side:first-child,.tl-side:last-child{justify-content:flex-start;padding:0}
  .tl-side-empty{display:none}
  .tl-card{max-width:none}
  .gain-grid{grid-template-columns:1fr}
  .note-stats{flex-wrap:wrap;gap:20px}
  .faq-body{padding-left:22px}
  .cta-form{padding:22px 18px}
  .footer .container{padding-top:48px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer p{max-width:none}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr}
  .hero-panel{padding:18px}
  .aside-list{overflow-x:auto;flex-wrap:nowrap;padding-bottom:4px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}

/* roulang page: category3 */
/* ========== 设计令牌 ========== */
:root{
  --ink:#0E1516;
  --ink-2:#14201F;
  --paper:#F4F6F5;
  --card:#FFFFFF;
  --brand:#14C8A6;
  --brand-dark:#0E9E84;
  --brand-soft:#E6FAF5;
  --brand-tint:#F0FBF8;
  --heat:#FF7A45;
  --violet:#6C4CE0;
  --text:#16211F;
  --text-2:#55635F;
  --text-3:#8A9793;
  --line:#E3E9E7;
  --line-dark:rgba(255,255,255,.08);
  --ok:#1F9D6B;
  --warn:#E0A32E;
  --err:#D8543F;
  --info:#3A7BD5;
  --r-card:12px;
  --r-btn:10px;
  --r-img:16px;
  --shadow:0 1px 2px rgba(16,33,31,.06), 0 8px 24px -12px rgba(16,33,31,.18);
  --shadow-hover:0 2px 4px rgba(16,33,31,.08), 0 16px 34px -14px rgba(16,33,31,.26);
  --side:248px;
  --maxw:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
button,input{font-family:inherit;font-size:15px;}
button{cursor:pointer;border:0;background:none;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
h1{font-size:38px;line-height:1.25;font-weight:700;}
h2{font-size:26px;line-height:1.35;font-weight:700;}
h3{font-size:18px;line-height:1.5;font-weight:600;}
p+p{margin-top:1.1em;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}

/* ========== 布局 ========== */
.layout{display:flex;min-height:100vh;}
.main{flex:1;margin-left:var(--side);min-width:0;display:flex;flex-direction:column;}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 40px;}
.section{padding:72px 0;}
.section-tight{padding:52px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:34px;flex-wrap:wrap;}
.section-head p{color:var(--text-2);font-size:15px;max-width:640px;}
.eyebrow{
  display:inline-block;font-size:13px;letter-spacing:.14em;color:var(--brand-dark);
  background:var(--brand-soft);padding:4px 10px;border-radius:8px;clip-path:polygon(8px 0,100% 0,100% 100%,0 100%);margin-bottom:14px;
}

/* ========== 侧栏导航 ========== */
.sidebar{
  position:fixed;top:0;left:0;width:var(--side);height:100vh;z-index:60;
  background:var(--ink);border-right:1px solid var(--line-dark);
  display:flex;flex-direction:column;color:#E9F1EF;
}
.sidebar::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.05;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:32px 32px;
}
.brand{display:flex;align-items:center;gap:12px;height:72px;padding:0 20px;border-bottom:1px solid var(--line-dark);position:relative;z-index:2;}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-dark));color:#04241D;
  font-weight:700;font-size:18px;border-radius:8px;clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0;}
.brand-name{font-size:15px;font-weight:700;color:#fff;white-space:nowrap;}
.brand-desc{font-size:12px;color:rgba(233,241,239,.55);}
.collapse-btn{
  position:absolute;top:26px;right:-1px;width:22px;height:22px;border-radius:6px 0 0 6px;
  background:var(--ink-2);color:rgba(233,241,239,.7);font-size:14px;line-height:1;z-index:5;
  border:1px solid var(--line-dark);border-right:0;
}
.collapse-btn:hover{color:#fff;background:#1B2A28;}
.nav-scroll{flex:1;overflow-y:auto;padding:18px 12px;position:relative;z-index:2;}
.nav-group-title{font-size:12px;letter-spacing:.12em;color:rgba(233,241,239,.42);padding:6px 12px 10px;}
.nav-item{
  display:flex;align-items:center;gap:12px;height:44px;padding:0 12px;margin-bottom:4px;
  border-radius:8px;font-size:15px;color:rgba(233,241,239,.78);position:relative;transition:background .18s ease,color .18s ease;
}
.nav-item .ic{width:18px;height:18px;flex:0 0 18px;opacity:.85;}
.nav-item:hover{background:rgba(255,255,255,.06);color:#fff;}
.nav-item.active{background:rgba(20,200,166,.1);color:#fff;font-weight:600;}
.nav-item.active::before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:2px;background:var(--brand);}
.sidebar-foot{padding:14px;border-top:1px solid var(--line-dark);display:grid;gap:10px;position:relative;z-index:2;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 18px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
  transition:transform .16s ease,background .16s ease,box-shadow .16s ease,color .16s ease;position:relative;overflow:hidden;
}
.btn::after{
  content:"";position:absolute;top:0;left:-120%;width:60%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.28),transparent);transition:left .5s ease;
}
.btn:hover::after{left:130%;}
.btn-primary{background:var(--brand);color:#04241D;box-shadow:0 6px 18px -10px rgba(20,200,166,.9);}
.btn-primary:hover{background:var(--brand-dark);color:#fff;}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{border:1px solid rgba(255,255,255,.18);color:rgba(233,241,239,.9);}
.btn-ghost:hover{border-color:var(--brand);color:#fff;background:rgba(20,200,166,.08);}
.btn-light{background:#fff;color:var(--text);border:1px solid var(--line);}
.btn-light:hover{border-color:var(--brand);color:var(--brand-dark);}
.btn-heat{background:var(--heat);color:#3A1607;}
.btn-heat:hover{background:#F0652E;color:#fff;}
.btn-lg{height:48px;padding:0 24px;}
.btn-line-brand{border:1px solid var(--brand);color:var(--brand-dark);background:#fff;}
.btn-line-brand:hover{background:var(--brand-soft);}

/* 移动端顶栏与抽屉 */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:56px;z-index:80;
  background:var(--ink);color:#fff;align-items:center;justify-content:space-between;padding:0 16px;
  border-bottom:1px solid var(--line-dark);
}
.topbar .brand{height:56px;padding:0;border:0;}
.hamburger{width:40px;height:40px;display:grid;place-items:center;border-radius:8px;border:1px solid var(--line-dark);}
.hamburger span{display:block;width:18px;height:2px;background:#fff;margin:2px 0;border-radius:2px;}
.drawer{
  position:fixed;inset:0;background:rgba(14,21,22,.95);z-index:90;padding:20px;
  display:none;flex-direction:column;gap:10px;overflow-y:auto;
}
.drawer.open{display:flex;}
.drawer .drawer-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px;}
.drawer .close-x{width:40px;height:40px;border:1px solid var(--line-dark);border-radius:8px;color:#fff;font-size:20px;line-height:1;}
.drawer .nav-item{height:48px;font-size:16px;}
.drawer .drawer-foot{display:grid;gap:10px;margin-top:14px;}

/* ========== 面包屑 ========== */
.breadcrumb{padding:22px 0 0;font-size:13px;color:var(--text-3);display:flex;gap:8px;flex-wrap:wrap;align-items:center;}
.breadcrumb a:hover{color:var(--brand-dark);}
.breadcrumb .sep{color:#C6D0CD;}

/* ========== Hero ========== */
.hero-flow{
  position:relative;background:linear-gradient(180deg,#0E1516 0%,#12201E 100%);
  color:#EAF3F1;overflow:hidden;padding:52px 0 60px;margin-top:18px;border-radius:0 0 24px 24px;
}
.hero-flow::before{
  content:"";position:absolute;inset:0;opacity:.05;
  background-image:linear-gradient(rgba(255,255,255,.7) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.7) 1px,transparent 1px);
  background-size:34px 34px;
}
.hero-flow::after{
  content:"";position:absolute;top:-60px;right:-40px;width:320px;height:320px;
  background:linear-gradient(135deg,rgba(20,200,166,.28),rgba(108,76,224,.16));
  transform:rotate(18deg);clip-path:polygon(28% 0,100% 0,100% 72%,72% 100%,0 100%,0 28%);pointer-events:none;
}
.hero-flow .container{position:relative;z-index:2;}
.hero-flow h1{font-size:38px;color:#fff;max-width:820px;}
.hero-flow h1 em{font-style:normal;color:var(--brand);}
.hero-lead{margin-top:16px;max-width:660px;color:rgba(234,243,241,.76);font-size:16.5px;}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.chip{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 12px;border-radius:8px;
  background:rgba(255,255,255,.06);border:1px solid var(--line-dark);font-size:13.5px;color:rgba(234,243,241,.86);
}
.chip b{color:var(--brand);font-weight:600;}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px;}

/* ========== 步骤条 ========== */
.stepbar{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin-bottom:44px;position:relative;}
.stepbar::before{
  content:"";position:absolute;top:23px;left:12%;right:12%;height:2px;
  background:repeating-linear-gradient(90deg,rgba(20,200,166,.4) 0 10px,transparent 10px 18px);
}
.step-node{display:flex;flex-direction:column;align-items:center;text-align:center;gap:12px;position:relative;z-index:2;}
.step-num{
  width:46px;height:46px;display:grid;place-items:center;border-radius:50%;
  background:#fff;border:2px solid var(--brand);color:var(--brand-dark);font-weight:700;font-size:17px;
  box-shadow:var(--shadow);
}
.step-node.on .step-num{background:var(--brand);color:#04241D;border-color:var(--brand);}
.step-node h3{font-size:16px;}
.step-node span{font-size:13px;color:var(--text-3);}

/* ========== 步骤图文 ========== */
.step-block{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow);padding:28px;margin-bottom:24px;
  display:grid;grid-template-columns:1.05fr .95fr;gap:32px;align-items:center;
  transition:transform .2s ease,box-shadow .2s ease;
}
.step-block:nth-child(even) .step-media{order:-1;}
.step-block:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);}
.step-tag{
  display:inline-block;font-size:13px;font-weight:600;color:#04241D;background:var(--brand);
  padding:3px 10px;border-radius:8px;clip-path:polygon(8px 0,100% 0,100% 100%,0 100%);
}
.step-block h3{margin:14px 0 10px;font-size:20px;}
.step-block p{color:var(--text-2);font-size:15.5px;}
.check-list{margin-top:16px;display:grid;gap:10px;}
.check-list li{position:relative;padding-left:24px;font-size:15px;color:var(--text-2);}
.check-list li::before{
  content:"";position:absolute;left:0;top:9px;width:9px;height:9px;border-radius:2px;
  background:linear-gradient(135deg,var(--brand),var(--heat));
}
.media{border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);position:relative;aspect-ratio:3/2;background:#E9EFED;}
.media img{width:100%;height:100%;object-fit:cover;}
.media .media-badge{
  position:absolute;left:12px;top:12px;background:rgba(14,21,22,.82);color:#EAF3F1;
  font-size:12.5px;padding:4px 10px;border-radius:8px;clip-path:polygon(8px 0,100% 0,100% 100%,0 100%);
}

/* ========== 数据条 ========== */
.stat-band{
  background:var(--ink-2);color:#EAF3F1;border-radius:var(--r-card);padding:30px;
  display:grid;grid-template-columns:repeat(4,1fr);gap:22px;position:relative;overflow:hidden;
}
.stat-band::after{
  content:"";position:absolute;right:-50px;bottom:-70px;width:200px;height:200px;
  background:rgba(20,200,166,.14);transform:rotate(24deg);clip-path:polygon(30% 0,100% 0,100% 70%,70% 100%,0 100%,0 30%);
}
.stat-item{position:relative;z-index:2;}
.stat-item b{display:block;font-size:28px;line-height:1.2;color:var(--brand);font-weight:700;}
.stat-item span{display:block;margin-top:8px;font-size:14px;color:rgba(234,243,241,.7);}

/* ========== 排查两栏 ========== */
.block-list{display:grid;gap:16px;}
.block-row{
  display:grid;grid-template-columns:230px 1fr;gap:24px;align-items:start;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:22px 24px;
  box-shadow:var(--shadow);transition:border-color .2s ease,transform .2s ease;
}
.block-row:hover{border-color:rgba(20,200,166,.5);transform:translateY(-2px);}
.block-row h3{display:flex;align-items:center;gap:10px;font-size:16.5px;}
.dot{width:10px;height:10px;border-radius:3px;background:var(--heat);flex:0 0 10px;}
.dot.ok{background:var(--ok);}
.dot.warn{background:var(--warn);}
.block-row p{color:var(--text-2);font-size:15px;}
.block-row .fix{margin-top:10px;font-size:14.5px;color:var(--brand-dark);background:var(--brand-tint);border-left:3px solid var(--brand);padding:8px 12px;border-radius:0 8px 8px 0;}

/* ========== FAQ ========== */
.faq{max-width:860px;}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);margin-bottom:12px;overflow:hidden;transition:border-color .2s ease;}
.faq-item.open{border-color:rgba(20,200,166,.55);}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;min-height:56px;padding:14px 20px;
  text-align:left;font-size:16.5px;font-weight:600;color:var(--text);
}
.faq-q .plus{
  width:24px;height:24px;flex:0 0 24px;border-radius:7px;background:var(--brand-soft);color:var(--brand-dark);
  display:grid;place-items:center;font-size:16px;line-height:1;transition:transform .2s ease,background .2s ease;
}
.faq-item.open .faq-q .plus{background:var(--brand);color:#04241D;transform:rotate(45deg);}
.faq-a{display:none;padding:0 20px 20px 58px;border-left:3px solid transparent;}
.faq-item.open .faq-a{display:block;border-left-color:var(--brand);}
.faq-a p{color:var(--text-2);font-size:15.5px;}

/* ========== 描边 CTA 条 ========== */
.cta-strip{
  border:1px dashed rgba(20,200,166,.6);background:linear-gradient(90deg,#FFFFFF 0%,var(--brand-tint) 100%);
  border-radius:var(--r-card);padding:28px 30px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
}
.cta-strip h2{font-size:22px;}
.cta-strip p{color:var(--text-2);font-size:15px;margin-top:6px;}
.cta-strip .cta-acts{display:flex;gap:12px;flex-wrap:wrap;}

/* ========== 页脚 ========== */
.footer{background:var(--ink);color:rgba(234,243,241,.78);margin-top:auto;padding:56px 0 0;position:relative;overflow:hidden;}
.footer::before{
  content:"";position:absolute;inset:0;opacity:.05;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:34px 34px;
}
.footer .container{position:relative;z-index:2;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:32px;padding-bottom:40px;border-bottom:1px solid var(--line-dark);}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand .brand-name{font-size:16px;}
.footer p{font-size:14px;color:rgba(234,243,241,.6);}
.footer h4{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600;}
.footer-links li{margin-bottom:10px;}
.footer-links a{font-size:14.5px;color:rgba(234,243,241,.72);transition:color .18s ease,padding-left .18s ease;}
.footer-links a:hover{color:var(--brand);padding-left:4px;}
.footer-contact li{font-size:14.5px;margin-bottom:10px;color:rgba(234,243,241,.72);}
.footer-contact b{color:#fff;font-weight:600;}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:22px 0;flex-wrap:wrap;}
.footer-bottom p{font-size:13.5px;color:rgba(234,243,241,.52);}
.to-top{
  width:40px;height:40px;border-radius:50%;border:1px solid rgba(255,255,255,.2);display:grid;place-items:center;
  color:#EAF3F1;font-size:16px;transition:background .2s ease,border-color .2s ease,transform .2s ease;
}
.to-top:hover{background:rgba(20,200,166,.16);border-color:var(--brand);transform:translateY(-2px);}

/* ========== 折叠态侧栏 ========== */
body.collapsed{--side:88px;}
body.collapsed .brand-text,
body.collapsed .nav-group-title,
body.collapsed .nav-item span,
body.collapsed .sidebar-foot .btn span{display:none;}
body.collapsed .nav-item{justify-content:center;padding:0;}
body.collapsed .sidebar-foot .btn{padding:0;width:100%;}
body.collapsed .collapse-btn{transform:rotate(180deg);}

/* ========== 响应式 ========== */
@media (max-width:1279px){
  :root{--side:88px;}
  .brand-text,.nav-group-title,.nav-item span,.sidebar-foot .btn span{display:none;}
  .nav-item{justify-content:center;padding:0;}
  .sidebar-foot .btn{padding:0;}
  .container{padding:0 28px;}
  .stat-band{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:1023px){
  .step-block{grid-template-columns:1fr;gap:22px;}
  .step-block:nth-child(even) .step-media{order:0;}
  .block-row{grid-template-columns:1fr;gap:10px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:767px){
  :root{--side:0px;}
  body{font-size:16px;}
  .sidebar{display:none;}
  .topbar{display:flex;}
  .main{margin-left:0;padding-top:56px;}
  .container{padding:0 16px;}
  h1,.hero-flow h1{font-size:26px;}
  h2{font-size:21px;}
  .section{padding:56px 0;}
  .hero-flow{padding:36px 0 44px;border-radius:0 0 18px 18px;margin-top:12px;}
  .stepbar{grid-template-columns:1fr;gap:18px;margin-bottom:32px;}
  .stepbar::before{display:none;}
  .step-node{flex-direction:row;text-align:left;gap:14px;justify-content:flex-start;}
  .step-node .step-meta{display:flex;flex-direction:column;}
  .step-block{padding:20px;}
  .stat-band{grid-template-columns:1fr;padding:24px;}
  .faq-a{padding-left:24px;}
  .cta-strip{flex-direction:column;align-items:flex-start;padding:22px;}
  .cta-strip .cta-acts{width:100%;}
  .cta-strip .cta-acts .btn{flex:1;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
}
@media (max-width:520px){
  .hero-actions .btn{width:100%;}
  .faq-q{font-size:15.5px;padding:14px 16px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
}

/* roulang page: category4 */
:root{
  --ink:#0E1516;
  --ink-2:#14201F;
  --paper:#F4F6F5;
  --card:#FFFFFF;
  --brand:#14C8A6;
  --brand-d:#0E9E84;
  --brand-l:#E6FAF5;
  --heat:#FF7A45;
  --violet:#6C4CE0;
  --text:#16211F;
  --text-2:#55635F;
  --text-3:#8A9793;
  --line:#E3E9E7;
  --line-d:rgba(255,255,255,.08);
  --ok:#1F9D6B;
  --warn:#E0A32E;
  --err:#D8543F;
  --info:#3A7BD5;
  --r-card:12px;
  --r-btn:10px;
  --r-img:16px;
  --sh-1:0 1px 2px rgba(16,33,31,.06), 0 8px 24px -12px rgba(16,33,31,.18);
  --sh-2:0 2px 6px rgba(16,33,31,.08), 0 18px 38px -16px rgba(16,33,31,.26);
  --sbw:248px;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16.5px;
  line-height:1.85;
  color:var(--text);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden;}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
  border-radius:6px;
}
::selection{background:var(--brand);color:#04211C;}

/* ---------- 容器 ---------- */
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 40px;
}
.page{
  margin-left:var(--sbw);
  transition:margin-left .28s ease;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
main{flex:1;}

/* ---------- 左侧导航 ---------- */
.sidebar{
  position:fixed;
  inset:0 auto 0 0;
  width:var(--sbw);
  background:var(--ink);
  border-right:1px solid var(--line-d);
  display:flex;
  flex-direction:column;
  z-index:80;
  overflow:hidden;
  transition:width .28s ease;
}
.sidebar::after{
  content:"";
  position:absolute;
  top:0;right:0;
  width:120px;height:120px;
  background:linear-gradient(225deg,rgba(20,200,166,.16),rgba(20,200,166,0));
  clip-path:polygon(100% 0,100% 100%,0 0);
  pointer-events:none;
}
.brand{
  height:72px;
  flex:0 0 72px;
  display:flex;
  align-items:center;
  gap:12px;
  padding:0 18px;
  border-bottom:1px solid var(--line-d);
  position:relative;
  z-index:1;
}
.brand-mark{
  flex:0 0 38px;
  width:38px;height:38px;
  display:grid;
  place-items:center;
  border-radius:10px;
  background:linear-gradient(140deg,var(--brand),var(--brand-d));
  color:#04211C;
  font-weight:800;
  font-size:18px;
  letter-spacing:.5px;
  clip-path:polygon(0 0,100% 0,100% 78%,86% 100%,0 100%);
}
.brand-text{display:flex;flex-direction:column;line-height:1.3;overflow:hidden;white-space:nowrap;}
.brand-name{color:#F2F7F6;font-weight:700;font-size:15.5px;letter-spacing:.2px;}
.brand-desc{color:var(--text-3);font-size:12px;letter-spacing:.6px;}
.collapse-btn{
  position:absolute;
  top:88px;right:10px;
  width:26px;height:26px;
  border-radius:8px;
  border:1px solid var(--line-d);
  color:#9DB0AC;
  font-size:14px;
  line-height:1;
  display:grid;
  place-items:center;
  transition:.2s;
  z-index:2;
}
.collapse-btn:hover{color:#fff;background:rgba(255,255,255,.08);}
.nav-scroll{
  flex:1 1 auto;
  overflow-y:auto;
  padding:22px 14px 18px;
  position:relative;
  z-index:1;
}
.nav-scroll::-webkit-scrollbar{width:6px;}
.nav-scroll::-webkit-scrollbar-thumb{background:rgba(255,255,255,.12);border-radius:6px;}
.nav-group-title{
  font-size:12px;
  letter-spacing:2px;
  color:#5F716D;
  padding:0 12px 10px;
  text-transform:uppercase;
}
.nav-item{
  display:flex;
  align-items:center;
  gap:12px;
  height:44px;
  padding:0 12px;
  margin-bottom:4px;
  border-radius:10px;
  color:#B9C7C3;
  font-size:15px;
  position:relative;
  transition:background .2s,color .2s,transform .2s;
  white-space:nowrap;
}
.nav-item .ic{
  flex:0 0 18px;
  width:18px;height:18px;
  color:#6E847F;
  transition:color .2s;
}
.nav-item:hover{background:rgba(255,255,255,.06);color:#fff;transform:translateX(2px);}
.nav-item:hover .ic{color:var(--brand);}
.nav-item.active{
  background:rgba(20,200,166,.08);
  color:#EAFFFA;
  font-weight:600;
}
.nav-item.active::before{
  content:"";
  position:absolute;
  left:0;top:9px;bottom:9px;
  width:3px;
  border-radius:0 3px 3px 0;
  background:var(--brand);
}
.nav-item.active .ic{color:var(--brand);}
.sidebar-foot{
  flex:0 0 auto;
  padding:16px 14px 20px;
  border-top:1px solid var(--line-d);
  display:flex;
  flex-direction:column;
  gap:10px;
  position:relative;
  z-index:1;
}
.hamburger{display:none;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 22px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  letter-spacing:.3px;
  transition:background .2s,color .2s,border-color .2s,transform .12s,box-shadow .2s;
  position:relative;
  overflow:hidden;
  white-space:nowrap;
}
.btn-primary{
  background:var(--brand);
  color:#04211C;
  box-shadow:0 8px 20px -10px rgba(20,200,166,.8);
}
.btn-primary:hover{background:var(--brand-d);color:#F0FFFB;box-shadow:0 12px 26px -12px rgba(20,200,166,.9);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  border:1px solid rgba(255,255,255,.22);
  color:#D9E6E3;
  background:rgba(255,255,255,.02);
}
.btn-ghost:hover{border-color:var(--brand);color:#EAFFFA;background:rgba(20,200,166,.1);}
.btn-outline{
  border:1px solid var(--line);
  color:var(--text);
  background:#fff;
}
.btn-outline:hover{border-color:var(--brand);color:var(--brand-d);background:var(--brand-l);}
.btn-sm{height:40px;padding:0 16px;font-size:14px;}
.sidebar-foot .btn{width:100%;height:44px;font-size:14.5px;}

/* ---------- 移动抽屉 ---------- */
.drawer{
  position:fixed;
  inset:0 0 0 auto;
  width:86%;
  max-width:380px;
  background:rgba(14,21,22,.97);
  z-index:120;
  transform:translateX(102%);
  transition:transform .3s ease;
  display:flex;
  flex-direction:column;
  padding:20px 18px 26px;
  border-left:1px solid var(--line-d);
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer-close{
  width:34px;height:34px;border-radius:9px;
  border:1px solid var(--line-d);color:#B9C7C3;
  display:grid;place-items:center;font-size:16px;
}
.drawer .nav-item{height:46px;}
.drawer-foot{margin-top:auto;display:flex;flex-direction:column;gap:10px;padding-top:18px;border-top:1px solid var(--line-d);}
.overlay{
  position:fixed;inset:0;background:rgba(8,14,15,.55);
  opacity:0;visibility:hidden;transition:.28s;z-index:110;
}
.overlay.open{opacity:1;visibility:visible;}

/* ---------- 页面头 ---------- */
.page-hero{
  position:relative;
  background:var(--ink);
  color:#EAFFFA;
  overflow:hidden;
  padding:54px 0 60px;
}
.page-hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center right;
  opacity:.26;
}
.page-hero::after{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:44px 44px;
  pointer-events:none;
}
.hero-inner{position:relative;z-index:2;}
.crumbs{
  font-size:13px;
  color:#7F938F;
  display:flex;
  align-items:center;
  gap:8px;
  margin-bottom:20px;
  flex-wrap:wrap;
}
.crumbs a{color:#9FB2AE;transition:color .2s;}
.crumbs a:hover{color:var(--brand);}
.crumbs .sep{color:#3C4C49;}
.hero-tag{
  display:inline-block;
  background:rgba(20,200,166,.14);
  color:var(--brand);
  font-size:13px;
  font-weight:600;
  padding:5px 12px;
  margin-bottom:16px;
  clip-path:polygon(0 0,100% 0,100% 76%,93% 100%,0 100%);
  letter-spacing:.5px;
}
.page-hero h1{
  font-size:38px;
  line-height:1.25;
  font-weight:700;
  letter-spacing:-.4px;
  color:#FFFFFF;
  max-width:820px;
}
.page-hero h1 em{
  font-style:normal;
  color:var(--brand);
  position:relative;
}
.hero-lead{
  margin-top:18px;
  max-width:680px;
  color:#A9BBB7;
  font-size:16.5px;
  line-height:1.85;
}
.hero-actions{display:flex;gap:14px;margin-top:28px;flex-wrap:wrap;}
.hero-stats{
  margin-top:36px;
  display:flex;
  gap:14px;
  flex-wrap:wrap;
}
.stat-chip{
  display:flex;
  align-items:center;
  gap:9px;
  padding:9px 16px;
  border:1px solid var(--line-d);
  border-radius:10px;
  background:rgba(255,255,255,.03);
  color:#C7D8D4;
  font-size:14px;
}
.stat-chip b{color:var(--brand);font-size:16px;font-family:"Inter",var(--font);}
.stat-chip .dot{
  width:7px;height:7px;border-radius:2px;background:var(--heat);
  transform:rotate(45deg);
  flex:0 0 7px;
}

/* ---------- 通用板块 ---------- */
.section{padding:74px 0;}
.section-tight{padding:56px 0;}
.section-head{margin-bottom:34px;}
.section-head .kicker{
  font-size:13px;
  font-weight:700;
  letter-spacing:2.4px;
  color:var(--brand-d);
  text-transform:uppercase;
  display:block;
  margin-bottom:10px;
}
.section-head h2{
  font-size:26px;
  font-weight:700;
  line-height:1.35;
  color:var(--text);
}
.section-head p{
  margin-top:12px;
  color:var(--text-2);
  max-width:720px;
  font-size:15.5px;
}

/* ---------- 速查卡 ---------- */
.quick-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px;
}
.quick-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:24px;
  box-shadow:var(--sh-1);
  position:relative;
  transition:transform .25s,box-shadow .25s,border-color .25s;
  display:flex;
  flex-direction:column;
  gap:10px;
}
.quick-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(20,200,166,.5);}
.quick-card::before{
  content:"";
  position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--brand),var(--heat));
  border-radius:var(--r-card) var(--r-card) 0 0;
  opacity:.85;
}
.quick-num{
  font-family:"Inter",var(--font);
  font-size:13px;
  font-weight:700;
  color:var(--text-3);
  letter-spacing:1.6px;
}
.quick-card h3{font-size:18px;font-weight:600;color:var(--text);}
.quick-card p{font-size:14.5px;color:var(--text-2);line-height:1.75;flex:1;}
.quick-link{
  font-size:14px;
  font-weight:600;
  color:var(--brand-d);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.quick-link::after{content:"→";transition:transform .2s;}
.quick-link:hover::after{transform:translateX(4px);}

/* ---------- 两栏问答版式 ---------- */
.qa-layout{
  display:grid;
  grid-template-columns:216px minmax(0,1fr) 258px;
  gap:34px;
  align-items:start;
  padding-top:8px;
}
.toc{
  position:sticky;
  top:24px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:20px 18px;
  box-shadow:var(--sh-1);
}
.toc h3{
  font-size:13px;
  letter-spacing:2px;
  color:var(--text-3);
  font-weight:700;
  margin-bottom:14px;
}
.toc a{
  display:block;
  font-size:14.5px;
  color:var(--text-2);
  padding:9px 10px;
  border-radius:8px;
  border-left:3px solid transparent;
  transition:.2s;
  line-height:1.5;
}
.toc a:hover{background:var(--brand-l);color:var(--brand-d);}
.toc a.current{
  border-left-color:var(--brand);
  background:var(--brand-l);
  color:var(--brand-d);
  font-weight:600;
}

.faq-group{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:26px 26px 12px;
  box-shadow:var(--sh-1);
  margin-bottom:26px;
  scroll-margin-top:24px;
}
.faq-group > header{
  display:flex;
  align-items:center;
  gap:12px;
  padding-bottom:16px;
  border-bottom:1px solid var(--line);
  margin-bottom:8px;
}
.faq-group h2{
  font-size:21px;
  font-weight:700;
  line-height:1.4;
}
.faq-group .count{
  margin-left:auto;
  font-size:12.5px;
  color:var(--brand-d);
  background:var(--brand-l);
  padding:3px 10px;
  border-radius:6px;
  white-space:nowrap;
  font-weight:600;
}
.qa-item{border-bottom:1px solid var(--line);}
.qa-item:last-child{border-bottom:0;}
.qa-item summary{
  list-style:none;
  cursor:pointer;
  min-height:56px;
  display:flex;
  align-items:center;
  gap:14px;
  padding:14px 4px;
  font-size:16px;
  font-weight:600;
  color:var(--text);
  line-height:1.6;
  transition:color .2s;
}
.qa-item summary::-webkit-details-marker{display:none;}
.qa-item summary::marker{display:none;content:"";}
.qa-item summary:hover{color:var(--brand-d);}
.plus{
  flex:0 0 24px;
  width:24px;height:24px;
  border-radius:8px;
  border:1px solid var(--line);
  background:var(--paper);
  color:var(--brand-d);
  display:grid;
  place-items:center;
  font-size:15px;
  font-weight:600;
  position:relative;
  transition:transform .25s,background .25s,border-color .25s;
}
.plus::before{content:"+";line-height:1;transform:translateY(-1px);}
.qa-item[open] .plus{background:var(--brand);border-color:var(--brand);color:#04211C;transform:rotate(45deg);}
.qa-item[open] summary{color:var(--brand-d);}
.qa-body{
  padding:0 4px 20px 42px;
  color:var(--text-2);
  font-size:15.5px;
  line-height:1.85;
  border-left:3px solid var(--brand);
  margin-left:0;
  padding-left:22px;
  margin-bottom:6px;
}
.qa-body p + p{margin-top:.85em;}
.qa-body ul{margin-top:12px;}
.qa-body li{
  position:relative;
  padding-left:18px;
  margin-bottom:8px;
}
.qa-body li::before{
  content:"";
  position:absolute;
  left:0;top:11px;
  width:6px;height:6px;
  background:var(--brand);
  border-radius:1px;
}
.qa-body strong{color:var(--text);font-weight:600;}

/* ---------- 右侧粘性小卡 ---------- */
.side-stack{
  position:sticky;
  top:24px;
  display:flex;
  flex-direction:column;
  gap:18px;
}
.mini-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-1);
}
.mini-card img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
}
.mini-body{padding:20px;}
.mini-body h3{font-size:17px;font-weight:700;margin-bottom:8px;}
.mini-body p{font-size:14px;color:var(--text-2);line-height:1.75;margin-bottom:16px;}
.mini-body .btn{width:100%;height:44px;font-size:14.5px;}
.mini-note{
  background:var(--ink-2);
  color:#9FB2AE;
  border-radius:var(--r-card);
  padding:18px 20px;
  border:1px solid var(--line-d);
}
.mini-note h4{color:#E4F3EF;font-size:15px;margin-bottom:10px;}
.mini-note li{
  font-size:13.5px;
  line-height:1.8;
  padding-left:14px;
  position:relative;
  color:#93A6A2;
}
.mini-note li::before{
  content:"";
  position:absolute;left:0;top:10px;
  width:5px;height:5px;border-radius:1px;
  background:var(--heat);
}

/* ---------- CTA 通栏 ---------- */
.cta-band{
  position:relative;
  background:var(--ink);
  color:#E8F6F2;
  overflow:hidden;
  padding:72px 0;
  margin-top:26px;
}
.cta-band::before{
  content:"";
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-3.webp');
  background-size:cover;
  background-position:center;
  opacity:.18;
}
.cta-band::after{
  content:"";
  position:absolute;
  top:-60px;right:-40px;
  width:280px;height:280px;
  background:linear-gradient(210deg,rgba(255,122,69,.22),rgba(255,122,69,0));
  clip-path:polygon(100% 0,100% 100%,0 0);
  pointer-events:none;
}
.cta-inner{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:44px;
  align-items:center;
}
.cta-inner h2{font-size:28px;font-weight:700;color:#fff;line-height:1.35;}
.cta-inner .cta-sub{margin-top:14px;color:#A9BBB7;font-size:16px;max-width:520px;}
.cta-list{margin-top:22px;display:flex;flex-direction:column;gap:12px;}
.cta-list li{
  display:flex;
  align-items:flex-start;
  gap:10px;
  color:#CBDBD7;
  font-size:15px;
}
.cta-list li i{
  flex:0 0 20px;
  width:20px;height:20px;
  border-radius:6px;
  background:rgba(20,200,166,.16);
  color:var(--brand);
  display:grid;
  place-items:center;
  font-style:normal;
  font-size:12px;
  margin-top:2px;
}
.cta-card{
  background:#fff;
  border-radius:var(--r-img);
  padding:26px;
  box-shadow:0 26px 50px -24px rgba(0,0,0,.6);
}
.cta-card h3{font-size:18px;font-weight:700;margin-bottom:6px;}
.cta-card .hint{font-size:13.5px;color:var(--text-3);margin-bottom:18px;}
.field{margin-bottom:14px;}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--text-2);margin-bottom:7px;}
.field input{
  width:100%;
  height:46px;
  border:1px solid var(--line);
  border-radius:var(--r-btn);
  padding:0 14px;
  font-size:15px;
  background:#FBFDFC;
  transition:border-color .2s,box-shadow .2s;
}
.field input::placeholder{color:#A9B5B2;}
.field input:focus{
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(20,200,166,.16);
  outline:none;
}
.field-row{display:flex;gap:10px;}
.field-row input{flex:1;}
.field-row .btn{height:46px;padding:0 14px;font-size:14px;flex:0 0 auto;}
.agree{
  display:flex;
  gap:9px;
  align-items:flex-start;
  font-size:13px;
  color:var(--text-2);
  line-height:1.7;
  margin:4px 0 16px;
}
.agree input{width:16px;height:16px;margin-top:4px;accent-color:var(--brand);}
.cta-card .btn-primary{width:100%;}
.form-note{
  font-size:12px;
  color:var(--text-3);
  margin-top:14px;
  line-height:1.7;
}
.form-msg{
  font-size:13px;
  color:var(--err);
  margin-top:10px;
  display:none;
}
.form-msg.show{display:block;}

/* ---------- 页脚 ---------- */
.footer{
  background:var(--ink);
  color:#9FB2AE;
  padding:62px 0 26px;
  border-top:1px solid var(--line-d);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.1fr;
  gap:32px;
}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand .brand-name{font-size:16px;}
.footer p{font-size:14px;line-height:1.85;color:#86999 5;color:#869995;max-width:340px;}
.footer h4{
  color:#E4F3EF;
  font-size:15px;
  font-weight:600;
  margin-bottom:16px;
  letter-spacing:.5px;
}
.footer-links li{margin-bottom:11px;}
.footer-links a{font-size:14px;color:#93A6A2;transition:.2s;}
.footer-links a:hover{color:var(--brand);padding-left:4px;}
.footer-contact li{font-size:14px;margin-bottom:11px;color:#93A6A2;}
.footer-contact b{color:#D3E4E0;font-weight:600;}
.footer-bottom{
  margin-top:44px;
  padding-top:22px;
  border-top:1px solid var(--line-d);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
}
.footer-bottom p{font-size:13px;color:#71837F;max-width:none;}
.to-top{
  flex:0 0 40px;
  width:40px;height:40px;
  border-radius:50%;
  border:1px solid rgba(255,255,255,.18);
  display:grid;
  place-items:center;
  color:#C7D8D4;
  font-size:16px;
  transition:.2s;
}
.to-top:hover{border-color:var(--brand);color:var(--brand);background:rgba(20,200,166,.1);}

/* ---------- 折叠态 ---------- */
body.collapsed{--sbw:88px;}
body.collapsed .brand-text,
body.collapsed .nav-group-title,
body.collapsed .nav-item span,
body.collapsed .sidebar-foot .btn span{display:none;}
body.collapsed .nav-item{justify-content:center;padding:0;}
body.collapsed .sidebar-foot .btn{padding:0;}
body.collapsed .collapse-btn{transform:rotate(180deg);}
body.collapsed .brand{justify-content:center;padding:0;}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .qa-layout{grid-template-columns:200px minmax(0,1fr);}
  .side-stack{position:static;grid-column:1 / -1;display:grid;grid-template-columns:1.2fr .8fr;gap:20px;align-items:stretch;}
}
@media (max-width:1024px){
  :root{--sbw:88px;}
  body:not(.collapsed){--sbw:88px;}
  body .brand-text,body .nav-group-title,body .nav-item span,body .sidebar-foot .btn span{display:none;}
  body .nav-item{justify-content:center;padding:0;}
  body .sidebar-foot .btn{padding:0;}
  body .brand{justify-content:center;padding:0;}
  body.collapsed{--sbw:248px;}
  body.collapsed .brand-text,body.collapsed .nav-group-title,body.collapsed .nav-item span,body.collapsed .sidebar-foot .btn span{display:inline;}
  body.collapsed .nav-item{justify-content:flex-start;padding:0 12px;}
  body.collapsed .sidebar-foot .btn{padding:0 12px;}
  body.collapsed .brand{justify-content:flex-start;padding:0 18px;}
  body.collapsed .page{margin-left:0;}
  .quick-grid{grid-template-columns:1fr 1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .cta-inner{grid-template-columns:1fr;}
  .cta-inner .cta-sub{max-width:none;}
}
@media (max-width:860px){
  .qa-layout{grid-template-columns:1fr;}
  .toc{position:static;display:flex;flex-wrap:wrap;gap:8px;padding:14px;}
  .toc h3{width:100%;margin-bottom:4px;}
  .toc a{flex:1 1 calc(50% - 8px);border-left:0;border:1px solid var(--line);text-align:center;font-size:15px;}
  .toc a.current{border-color:var(--brand);}
  .side-stack{grid-template-columns:1fr;}
}
@media (max-width:768px){
  :root{--sbw:0px;}
  body,body.collapsed{--sbw:0px;}
  body.collapsed .page{margin-left:0;}
  .page{margin-left:0;padding-top:56px;}
  .sidebar{
    width:100%;
    height:56px;
    inset:0 0 auto 0;
    flex-direction:row;
    align-items:center;
    padding:0 14px;
    border-right:0;
    border-bottom:1px solid var(--line-d);
    overflow:visible;
  }
  .sidebar::after{display:none;}
  .brand{height:56px;flex:0 0 auto;padding:0;border-bottom:0;justify-content:flex-start;}
  .brand-mark{width:32px;height:32px;flex:0 0 32px;font-size:15px;border-radius:9px;}
  .brand-name{font-size:15px;}
  .brand-desc{display:none;}
  .brand-text{display:flex !important;}
  .nav-scroll,.sidebar-foot,.collapse-btn{display:none;}
  .hamburger{
    display:grid;
    place-items:center;
    margin-left:auto;
    width:38px;height:38px;
    border-radius:10px;
    border:1px solid var(--line-d);
    color:#CFDFDB;
    font-size:17px;
  }
  .container{padding:0 16px;}
  .page-hero{padding:34px 0 42px;}
  .page-hero h1{font-size:26px;}
  .hero-lead{font-size:15.5px;}
  .hero-actions .btn{flex:1 1 auto;}
  .hero-stats{gap:10px;}
  .stat-chip{font-size:13px;padding:8px 12px;flex:1 1 calc(50% - 6px);}
  .section{padding:52px 0;}
  .section-head h2{font-size:21px;}
  .quick-grid{grid-template-columns:1fr;}
  .faq-group{padding:20px 16px 8px;}
  .qa-item summary{font-size:15.5px;gap:10px;}
  .qa-body{padding-left:16px;font-size:15px;}
  .cta-band{padding:52px 0;}
  .cta-inner h2{font-size:22px;}
  .cta-card{padding:20px;}
  .footer{padding:44px 0 20px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px;}
  .footer-grid > div:first-child{grid-column:1 / -1;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  body{font-size:16px;}
  .footer-grid{grid-template-columns:1fr;}
  .field-row{flex-direction:column;}
  .field-row .btn{width:100%;}
  .hero-actions .btn{width:100%;}
  .stat-chip{flex:1 1 100%;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
}