/* roulang page: index */
/* ============ 设计变量 ============ */
:root{
  --bg:#070B16;
  --bg-2:#0B1120;
  --bg-3:#0E1526;
  --brand:#1E6BFF;
  --brand-2:#1652D6;
  --brand-soft:rgba(30,107,255,.14);
  --accent:#17D1C0;
  --gold:#FFB020;
  --text:#E8EEF9;
  --text-2:#9BA9C4;
  --text-3:#66748F;
  --line:rgba(255,255,255,.08);
  --card-line:rgba(255,255,255,.10);
  --card:rgba(255,255,255,.04);
  --r-card:16px;
  --r-pill:999px;
  --r-input:12px;
  --r-badge:6px;
  --shadow:0 12px 32px rgba(0,0,0,.35);
  --shadow-hover:0 18px 48px rgba(30,107,255,.22);
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --container:1200px;
  --section:96px;
}

/* ============ reset / base ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;transition:color .2s ease;}
button,input,textarea{font:inherit;color:inherit;}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
  border-radius:6px;
}
::selection{background:rgba(30,107,255,.35);}

/* ============ 容器与板块 ============ */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px;}
.section{padding:var(--section) 0;position:relative;}
.section--alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section--deep{background:var(--bg-3);}
.sec-head{max-width:760px;margin-bottom:44px;}
.sec-num{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mono);font-size:13px;letter-spacing:.16em;
  color:var(--accent);text-transform:uppercase;margin-bottom:14px;
}
.sec-num::before{content:"";width:26px;height:1px;background:var(--accent);opacity:.6;}
.sec-title{font-size:32px;line-height:1.35;font-weight:700;letter-spacing:.2px;}
.sec-sub{margin-top:12px;color:var(--text-2);font-size:16px;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;border:1px solid transparent;
  cursor:pointer;white-space:nowrap;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,filter .18s ease,color .18s ease;
}
.btn-primary{
  background:linear-gradient(135deg,#2A7BFF,#1652D6);
  color:#fff;
  box-shadow:0 0 0 1px rgba(30,107,255,.5),0 8px 24px rgba(30,107,255,.35);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(30,107,255,.65),0 12px 30px rgba(30,107,255,.45);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(30,107,255,.4),0 5px 14px rgba(30,107,255,.28);}
.btn-ghost{
  background:transparent;border-color:rgba(30,107,255,.55);color:#9CC3FF;
}
.btn-ghost:hover{background:rgba(30,107,255,.12);color:#CFE1FF;transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-block{width:100%;}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;border-radius:var(--r-badge);
  font-size:12px;letter-spacing:.04em;
  background:rgba(23,209,192,.12);color:#6FE7DC;
  border:1px solid rgba(23,209,192,.28);
}
.badge--gold{background:rgba(255,176,32,.12);color:#FFC968;border-color:rgba(255,176,32,.3);}
.badge--blue{background:var(--brand-soft);color:#9CC3FF;border-color:rgba(30,107,255,.35);}

/* ============ 顶部导航面板 ============ */
.site-header{position:sticky;top:0;z-index:80;padding-top:16px;}
.nav-panel{
  position:relative;
  display:flex;align-items:center;gap:16px;
  padding:10px 12px 10px 18px;
  border-radius:20px;
  background:rgba(11,17,32,.82);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border:1px solid var(--card-line);
  box-shadow:var(--shadow);
  transition:padding .25s ease,background .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled .nav-panel{
  padding:6px 10px 6px 14px;
  background:rgba(7,11,22,.94);
  box-shadow:0 10px 28px rgba(0,0,0,.5);
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),#0D3AA8);
  color:#fff;font-weight:700;font-size:17px;
  box-shadow:0 8px 20px rgba(30,107,255,.35);
}
.brand-text strong{display:block;font-size:16px;font-weight:700;line-height:1.25;letter-spacing:.3px;}
.brand-text em{display:block;font-style:normal;font-size:11px;letter-spacing:.22em;color:var(--text-3);}
.nav-links{display:flex;align-items:center;gap:8px;margin-left:6px;flex:1;}
.nav-card{
  display:inline-flex;align-items:center;gap:7px;
  padding:9px 15px;border-radius:12px;
  font-size:14px;color:var(--text-2);
  border:1px solid transparent;
  transition:background .2s ease,color .2s ease,transform .2s ease,border-color .2s ease;
}
.nav-card i{font-style:normal;font-size:12px;color:var(--accent);opacity:.85;}
.nav-card:hover{background:rgba(255,255,255,.05);color:var(--text);transform:translateY(-1px);border-color:var(--card-line);}
.nav-card.is-active{
  color:var(--text);background:var(--brand-soft);
  border-color:rgba(30,107,255,.45);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
}
.nav-cta{margin-left:auto;padding:11px 22px;font-size:14px;}
.nav-toggle{
  display:none;margin-left:auto;
  width:44px;height:40px;border-radius:12px;
  background:rgba(255,255,255,.05);border:1px solid var(--card-line);
  cursor:pointer;align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform .2s ease,opacity .2s ease;}

/* ============ Hero ============ */
.hero{position:relative;padding:88px 0 92px;overflow:hidden;}
.hero-bg{
  position:absolute;inset:0;
  background:
    radial-gradient(120% 90% at 82% 12%,rgba(30,107,255,.20),transparent 60%),
    linear-gradient(180deg,rgba(7,11,22,.72) 0%,rgba(7,11,22,.90) 55%,rgba(7,11,22,.99) 100%),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.35fr .85fr;gap:48px;align-items:center;}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:var(--r-pill);
  border:1px solid rgba(23,209,192,.3);background:rgba(23,209,192,.08);
  color:#7CEBE0;font-size:13px;letter-spacing:.06em;margin-bottom:22px;
}
.hero h1{
  font-size:clamp(30px,4.2vw,50px);
  line-height:1.28;font-weight:700;letter-spacing:.4px;
}
.hero h1 span{color:#7FB2FF;}
.hero-lead{margin-top:18px;font-size:17px;color:var(--text-2);max-width:520px;}
.hero-actions{margin-top:32px;display:flex;flex-wrap:wrap;gap:14px;}
.hero-note{margin-top:20px;font-size:13px;color:var(--text-3);}
.glass-card{
  border-radius:var(--r-card);
  background:var(--card);
  border:1px solid var(--card-line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06),var(--shadow);
  padding:26px;
}
.hero-card-title{font-size:14px;color:var(--text-2);letter-spacing:.08em;margin-bottom:18px;}
.hero-stats{display:grid;gap:16px;}
.hero-stat{display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding-bottom:14px;border-bottom:1px solid var(--line);}
.hero-stat:last-child{border-bottom:0;padding-bottom:0;}
.hero-stat b{font-family:var(--mono);font-size:24px;color:#8FB8FF;font-weight:700;letter-spacing:.5px;}
.hero-stat small{font-size:13px;color:var(--text-3);}

/* ============ 卖点（错位栅格） ============ */
.points-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:20px;}
.point-card{
  position:relative;
  padding:28px;
  border-radius:var(--r-card);
  background:var(--card);
  border:1px solid var(--card-line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06),var(--shadow);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease,background .22s ease;
  overflow:hidden;
}
.point-card::after{
  content:"";position:absolute;right:-30px;top:-30px;width:120px;height:120px;
  background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:14px 14px;opacity:.5;pointer-events:none;
}
.point-card:hover{transform:translateY(-4px);border-color:rgba(30,107,255,.4);box-shadow:var(--shadow-hover);}
.point-card:nth-child(1){grid-column:span 7;}
.point-card:nth-child(2){grid-column:span 5;}
.point-card:nth-child(3){grid-column:span 5;}
.point-card:nth-child(4){grid-column:span 7;}
.point-num{
  font-family:var(--mono);font-size:13px;letter-spacing:.16em;color:var(--accent);
  display:inline-block;padding:2px 9px;border-radius:var(--r-badge);
  background:rgba(23,209,192,.1);border:1px solid rgba(23,209,192,.25);margin-bottom:16px;
}
.point-card h3{font-size:20px;font-weight:600;margin-bottom:10px;}
.point-card p{color:var(--text-2);font-size:15px;}

/* ============ 演示区（大图 + 竖步骤条） ============ */
.demo-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:36px;align-items:start;}
.demo-visual{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--card-line);box-shadow:var(--shadow);
  background:var(--bg-2);
}
.demo-visual img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .5s ease;}
.demo-visual:hover img{transform:scale(1.03);}
.demo-caption{
  position:absolute;left:18px;bottom:18px;right:18px;
  padding:14px 16px;border-radius:12px;
  background:rgba(7,11,22,.78);backdrop-filter:blur(10px);
  border:1px solid var(--card-line);font-size:13px;color:var(--text-2);
}
.steps{position:relative;padding-left:6px;}
.steps li{position:relative;padding:0 0 26px 44px;}
.steps li:last-child{padding-bottom:0;}
.steps li::before{
  content:"";position:absolute;left:15px;top:32px;bottom:2px;width:1px;
  background:linear-gradient(180deg,rgba(30,107,255,.55),rgba(30,107,255,.05));
}
.steps li:last-child::before{display:none;}
.step-idx{
  position:absolute;left:0;top:2px;width:32px;height:32px;border-radius:10px;
  display:grid;place-items:center;font-family:var(--mono);font-size:13px;
  background:var(--brand-soft);border:1px solid rgba(30,107,255,.45);color:#9CC3FF;
}
.steps h3{font-size:16px;font-weight:600;margin-bottom:4px;}
.steps p{font-size:14px;color:var(--text-3);}

/* ============ 证据区 ============ */
.proof-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:20px;}
.quote-card{
  padding:30px;border-radius:var(--r-card);
  background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.02));
  border:1px solid var(--card-line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06),var(--shadow);
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.quote-card:hover{transform:translateY(-4px);border-color:rgba(23,209,192,.35);box-shadow:var(--shadow-hover);}
.quote-card p{font-size:17px;line-height:1.85;color:#D7E2F5;}
.quote-card--sm p{font-size:15px;color:var(--text-2);}
.quote-meta{margin-top:18px;font-size:13px;color:var(--text-3);display:flex;align-items:center;gap:10px;}
.scale-list{margin-top:36px;display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.scale-item{padding:20px 22px;border-radius:14px;background:rgba(255,255,255,.03);border:1px solid var(--line);}
.scale-item b{display:block;font-family:var(--mono);font-size:26px;color:#8FB8FF;letter-spacing:.5px;}
.scale-item span{display:block;font-size:13px;color:var(--text-3);margin:6px 0 12px;}
.scale-bar{height:6px;border-radius:99px;background:rgba(255,255,255,.07);overflow:hidden;}
.scale-bar i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--accent),var(--brand));}

/* ============ 价格区（非等高） ============ */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:center;}
.price-card{
  padding:32px 26px;border-radius:var(--r-card);
  background:rgba(255,255,255,.03);
  border:1px solid var(--card-line);
  box-shadow:var(--shadow);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.price-card:hover{transform:translateY(-4px);border-color:rgba(30,107,255,.4);box-shadow:var(--shadow-hover);}
.price-card h3{font-size:18px;font-weight:600;}
.price-card .plan-note{font-size:13px;color:var(--text-3);margin-top:6px;}
.price-value{margin:20px 0 6px;font-family:var(--mono);font-size:34px;font-weight:700;color:#8FB8FF;letter-spacing:.5px;}
.price-value small{font-size:14px;color:var(--text-3);font-family:system-ui,sans-serif;font-weight:400;letter-spacing:0;}
.price-list{margin:22px 0 26px;display:grid;gap:10px;}
.price-list li{position:relative;padding-left:22px;font-size:14px;color:var(--text-2);}
.price-list li::before{
  content:"";position:absolute;left:0;top:10px;width:10px;height:10px;border-radius:3px;
  background:rgba(23,209,192,.18);border:1px solid rgba(23,209,192,.6);
}
.price-card--featured{
  padding:44px 28px;
  background:linear-gradient(180deg,rgba(30,107,255,.14),rgba(255,255,255,.03));
  border-color:rgba(30,107,255,.5);
  box-shadow:0 0 0 1px rgba(30,107,255,.35),0 24px 60px rgba(30,107,255,.22);
}
.price-card--featured .price-value{color:#A9C8FF;font-size:40px;}
.price-flag{
  display:inline-block;margin-bottom:12px;padding:3px 10px;border-radius:var(--r-badge);
  font-size:12px;color:#1A1305;background:var(--gold);font-weight:600;
}

/* ============ FAQ ============ */
.faq-wrap{padding:10px 24px;border-radius:var(--r-card);background:var(--card);border:1px solid var(--card-line);box-shadow:inset 0 1px 0 rgba(255,255,255,.06),var(--shadow);}
.faq-list{margin:0;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:last-child{border-bottom:0;}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 0;font-size:16px;font-weight:600;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";font-family:var(--mono);font-size:20px;color:var(--accent);
  transition:transform .22s ease;flex-shrink:0;
}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-item[open] summary{color:#CFE1FF;}
.faq-answer{padding:0 0 22px;color:var(--text-2);font-size:15px;line-height:1.9;}

/* ============ 资讯列表 ============ */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.news-card{
  display:flex;flex-direction:column;overflow:hidden;
  border-radius:var(--r-card);
  background:var(--card);border:1px solid var(--card-line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06),var(--shadow);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.news-card:hover{transform:translateY(-4px);border-color:rgba(30,107,255,.4);box-shadow:var(--shadow-hover);}
.news-thumb{display:block;overflow:hidden;border-radius:12px;margin:14px 14px 0;}
.news-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:12px;transition:transform .45s ease;}
.news-card:hover .news-thumb img{transform:scale(1.03);}
.news-body{padding:16px 18px 20px;display:flex;flex-direction:column;flex:1;}
.news-body .badge{align-self:flex-start;margin-bottom:10px;}
.news-title{font-size:16px;font-weight:600;line-height:1.6;margin-bottom:8px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-title a:hover{color:#8FB8FF;}
.news-desc{font-size:14px;color:var(--text-3);margin-bottom:16px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:13px;color:var(--text-3);border-top:1px solid var(--line);padding-top:12px;}
.news-meta a{color:#7FB2FF;font-weight:600;}
.news-meta a:hover{color:var(--accent);text-decoration:underline;text-underline-offset:3px;}
.news-empty{
  grid-column:1 / -1;text-align:center;padding:56px 20px;
  border-radius:var(--r-card);border:1px dashed var(--card-line);background:rgba(255,255,255,.02);
}
.news-empty .ico{font-size:30px;color:var(--accent);display:block;margin-bottom:12px;}
.news-empty p{color:var(--text-2);margin-bottom:18px;}

/* ============ CTA 表单 ============ */
.cta-card{
  padding:40px;border-radius:var(--r-card);
  background:linear-gradient(180deg,rgba(30,107,255,.12),rgba(255,255,255,.03));
  border:1px solid rgba(30,107,255,.3);
  box-shadow:0 24px 60px rgba(30,107,255,.14);
  display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;
}
.cta-card h2{font-size:28px;line-height:1.4;font-weight:700;}
.cta-card p{margin-top:14px;color:var(--text-2);font-size:15px;}
.cta-list{margin-top:22px;display:grid;gap:8px;}
.cta-list li{font-size:14px;color:var(--text-2);padding-left:20px;position:relative;}
.cta-list li::before{content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:2px;background:var(--accent);opacity:.75;}
.form-field{margin-bottom:14px;}
.form-field label{display:block;font-size:13px;color:var(--text-2);margin-bottom:6px;}
.form-field input,.form-field textarea{
  width:100%;padding:12px 14px;border-radius:var(--r-input);
  background:rgba(7,11,22,.7);border:1px solid var(--card-line);
  color:var(--text);font-size:14px;transition:border-color .2s ease,box-shadow .2s ease;
}
.form-field textarea{min-height:96px;resize:vertical;}
.form-field input:focus,.form-field textarea:focus{
  outline:none;border-color:rgba(30,107,255,.7);
  box-shadow:0 0 0 3px rgba(30,107,255,.22);
}
.form-hint{font-size:12px;color:var(--text-3);margin-top:10px;}
.form-success{
  display:none;margin-top:14px;padding:12px 14px;border-radius:var(--r-input);
  font-size:13px;color:#7CEBE0;background:rgba(23,209,192,.1);border:1px solid rgba(23,209,192,.3);
}
.form-success.is-show{display:block;}

/* ============ 页脚 ============ */
.site-footer{border-top:1px solid var(--line);background:var(--bg-2);padding:64px 0 28px;margin-top:var(--section);}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:34px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand strong{font-size:16px;}
.footer-desc{font-size:14px;color:var(--text-3);max-width:320px;}
.footer-col h4{font-size:14px;font-weight:600;margin-bottom:14px;color:var(--text);}
.footer-col li{margin-bottom:9px;}
.footer-col a{font-size:14px;color:var(--text-3);}
.footer-col a:hover{color:#7FB2FF;}
.footer-contact li{font-size:14px;color:var(--text-3);}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:70;
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 24px;border-radius:var(--r-pill);
  background:linear-gradient(135deg,#2A7BFF,#1652D6);color:#fff;font-size:15px;font-weight:600;
  box-shadow:0 0 0 1px rgba(30,107,255,.5),0 14px 36px rgba(30,107,255,.42);
  opacity:0;pointer-events:none;transform:translateY(12px);
  transition:opacity .28s ease,transform .28s ease,filter .2s ease;
}
.float-cta.is-visible{opacity:1;pointer-events:auto;transform:translateY(0);}
.float-cta.is-hidden{opacity:0 !important;pointer-events:none !important;}
.float-cta:hover{filter:brightness(1.08);}
.float-cta:active{transform:translateY(1px);}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  :root{--section:72px;}
  .container{padding:0 24px;}
  .nav-toggle{display:flex;}
  .nav-cta{display:none;}
  .nav-links{
    display:none;position:absolute;top:calc(100% + 10px);left:0;right:0;
    flex-direction:column;align-items:stretch;gap:8px;margin:0;padding:12px;
    background:rgba(11,17,32,.96);backdrop-filter:blur(18px);
    border:1px solid var(--card-line);border-radius:16px;box-shadow:var(--shadow);
  }
  .nav-links.is-open{display:flex;}
  .nav-card{justify-content:flex-start;padding:12px 14px;font-size:15px;}
  .hero-inner{grid-template-columns:1fr;gap:32px;}
  .hero{padding:64px 0 68px;}
  .points-grid .point-card{grid-column:span 6 !important;}
  .demo-grid{grid-template-columns:1fr;gap:28px;}
  .proof-grid{grid-template-columns:1fr;}
  .scale-list{grid-template-columns:1fr 1fr;}
  .price-grid{grid-template-columns:1fr;gap:18px;}
  .price-card--featured{padding:34px 26px;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .cta-card{grid-template-columns:1fr;gap:28px;padding:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:640px){
  :root{--section:56px;}
  .container{padding:0 20px;}
  body{padding-bottom:84px;}
  .sec-title{font-size:24px;}
  .hero-lead{font-size:16px;}
  .points-grid .point-card{grid-column:span 12 !important;}
  .scale-list{grid-template-columns:1fr;}
  .news-grid{grid-template-columns:1fr;}
  .faq-wrap{padding:6px 16px;}
  .faq-item summary{font-size:15px;padding:16px 0;}
  .site-footer{padding:48px 0 24px;margin-top:56px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
  .float-cta{
    left:16px;right:16px;bottom:16px;justify-content:center;
    padding:13px 18px;border-radius:14px;font-size:15px;
  }
}

/* roulang page: article */
:root{
  --bg:#070B16;--bg-2:#0B1120;--bg-3:#0E1526;--bg-4:#05080F;
  --primary:#1E6BFF;--primary-deep:#0F4FD8;--accent:#17D1C0;--point:#FFB020;
  --text:#E8EEF9;--text-2:#9BA9C4;--text-3:#66748F;
  --line:rgba(255,255,255,.08);--glass:rgba(255,255,255,.04);--glass-brd:rgba(255,255,255,.10);
  --radius-card:16px;--radius-btn:999px;--radius-input:12px;--radius-badge:6px;
  --shadow-card:0 12px 32px rgba(0,0,0,.35);
  --shadow-hover:0 18px 48px rgba(30,107,255,.22);
  --container:1200px;--space:96px;--space-m:56px;
  --font:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);font-size:16px;line-height:1.8;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease}
button,input,textarea,select{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5{margin:0;font-weight:700;line-height:1.3;letter-spacing:-.2px}
p{margin:0}
table{border-collapse:collapse}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}
::selection{background:rgba(30,107,255,.4)}

/* ---------- 顶部导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;padding:14px 0;background:linear-gradient(180deg,rgba(7,11,22,.95),rgba(7,11,22,.72));backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
.nav-panel{position:relative;display:flex;align-items:center;gap:16px;padding:11px 13px;background:var(--glass);border:1px solid var(--glass-brd);border-radius:18px;box-shadow:0 12px 32px rgba(0,0,0,.35),inset 0 1px 0 rgba(255,255,255,.06);backdrop-filter:blur(14px)}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;font-size:18px;font-weight:700;color:#fff;background:linear-gradient(135deg,var(--primary),var(--accent));box-shadow:0 8px 20px rgba(30,107,255,.35)}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:16px;letter-spacing:.4px;color:#fff}
.brand-text em{font-style:normal;font-size:12px;letter-spacing:3px;color:var(--accent)}
.nav-links{display:flex;align-items:center;gap:8px;margin-left:auto}
.nav-card{display:inline-flex;align-items:center;gap:8px;padding:9px 14px;border-radius:12px;font-size:15px;color:var(--text-2);background:rgba(255,255,255,.02);border:1px solid transparent;transition:all .22s ease}
.nav-card i{font-style:normal;font-size:9px;color:var(--text-3);transition:color .22s ease}
.nav-card:hover{color:var(--text);background:rgba(255,255,255,.07);border-color:var(--glass-brd);transform:translateY(-1px)}
.nav-card:hover i{color:var(--accent)}
.nav-card.is-active{color:#fff;background:rgba(30,107,255,.14);border-color:rgba(30,107,255,.6);box-shadow:0 8px 20px rgba(30,107,255,.22)}
.nav-card.is-active i{color:var(--accent)}
.nav-cta{flex:0 0 auto}
.nav-toggle{display:none;margin-left:auto;width:46px;height:40px;border-radius:12px;border:1px solid var(--glass-brd);background:rgba(255,255,255,.04);cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px;transition:background .2s ease}
.nav-toggle:hover{background:rgba(255,255,255,.09)}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);transition:transform .22s ease,opacity .22s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 22px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:all .22s ease;white-space:nowrap}
.btn-primary{color:#fff;background:linear-gradient(135deg,var(--primary),var(--primary-deep));box-shadow:0 0 0 1px rgba(30,107,255,.5),0 8px 24px rgba(30,107,255,.35)}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(30,107,255,.62),0 14px 32px rgba(30,107,255,.45)}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(30,107,255,.5),0 6px 16px rgba(30,107,255,.28)}
.btn-ghost{color:var(--text);border-color:var(--glass-brd);background:transparent}
.btn-ghost:hover{background:rgba(30,107,255,.12);border-color:rgba(30,107,255,.5);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(1px)}

/* ---------- 页面头部 ---------- */
.page-hero{position:relative;padding:56px 0 52px;background:var(--bg-2);border-bottom:1px solid var(--line);overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center;opacity:.3}
.page-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,11,22,.5) 0%,rgba(7,11,22,.86) 60%,rgba(7,11,22,.98) 100%)}
.page-hero .container{position:relative;z-index:2}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--text-3);margin-bottom:22px}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{opacity:.5}
.breadcrumb .current{color:var(--text-3);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-head h1{font-size:clamp(26px,4vw,42px);line-height:1.32;color:#fff;max-width:920px}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px 20px;margin-top:20px;font-size:14px;color:var(--text-2)}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--text-3);display:inline-block}
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:var(--radius-badge);font-size:12px;font-weight:600;color:var(--accent);background:rgba(23,209,192,.12);border:1px solid rgba(23,209,192,.32)}
.badge-point{color:var(--point);background:rgba(255,176,32,.12);border-color:rgba(255,176,32,.32)}

/* ---------- 正文 ---------- */
.article-section{padding:64px 0 88px;background:var(--bg-2)}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;align-items:start}
.article-card{background:var(--glass);border:1px solid var(--glass-brd);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:40px;backdrop-filter:blur(14px)}
.prose{max-width:800px;font-size:16.5px;line-height:1.9;color:#D6E0F0}
.prose>*+*{margin-top:1.2em}
.prose h2{font-size:23px;margin-top:2em;color:#fff;padding-left:14px;border-left:3px solid var(--primary)}
.prose h3{font-size:19px;margin-top:1.6em;color:#fff}
.prose h4{font-size:17px;margin-top:1.4em;color:#fff}
.prose strong{color:#fff;font-weight:600}
.prose a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}
.prose a:hover{color:var(--primary)}
.prose ul,.prose ol{padding-left:1.4em}
.prose ul li{list-style:disc}
.prose ol li{list-style:decimal}
.prose li+li{margin-top:.5em}
.prose blockquote{margin:1.6em 0;padding:16px 22px;border-left:3px solid var(--accent);background:rgba(23,209,192,.08);border-radius:0 12px 12px 0;color:var(--text-2)}
.prose img{border-radius:12px;margin:1.6em auto;box-shadow:0 12px 32px rgba(0,0,0,.4)}
.prose figure{margin:1.6em 0}
.prose figcaption{margin-top:10px;text-align:center;font-size:13px;color:var(--text-3)}
.prose pre{background:#060A14;border:1px solid var(--line);border-radius:12px;padding:16px 18px;overflow:auto;font-family:var(--mono);font-size:14px;line-height:1.7}
.prose code{font-family:var(--mono);font-size:.92em;background:rgba(255,255,255,.07);padding:2px 6px;border-radius:6px}
.prose pre code{background:none;padding:0}
.prose table{width:100%;border:0;border-radius:12px;overflow:hidden;margin:1.6em 0;font-size:15px}
.prose thead th{background:rgba(30,107,255,.18);color:#fff;font-weight:600}
.prose th,.prose td{padding:12px 16px;text-align:left;border:0}
.prose tbody tr:nth-child(odd){background:rgba(255,255,255,.03)}
.prose tbody tr:nth-child(even){background:rgba(255,255,255,.06)}
.prose hr{border:0;border-top:1px solid var(--line);margin:2em 0}

.empty-state{text-align:center;padding:56px 20px;background:var(--glass);border:1px dashed var(--glass-brd);border-radius:var(--radius-card)}
.empty-icon{width:56px;height:56px;margin:0 auto 18px;border-radius:16px;display:grid;place-items:center;font-size:24px;color:var(--accent);background:rgba(23,209,192,.1);border:1px solid rgba(23,209,192,.3)}
.empty-state h2{font-size:22px;color:#fff;margin-bottom:10px}
.empty-state p{color:var(--text-2);font-size:15px;max-width:460px;margin:0 auto 24px}

/* ---------- 侧栏 ---------- */
.side-card{background:var(--glass);border:1px solid var(--glass-brd);border-radius:var(--radius-card);padding:22px;margin-bottom:20px;backdrop-filter:blur(14px);box-shadow:var(--shadow-card)}
.side-card h3{font-size:16px;color:#fff;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.side-card h3::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--accent)}
.side-list li+li{margin-top:10px;padding-top:10px;border-top:1px solid var(--line)}
.side-list a{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--text-2);line-height:1.6}
.side-list a:hover{color:var(--accent)}
.side-list .idx{font-family:var(--mono);font-size:12px;color:var(--text-3);padding-top:2px}
.hot-list li+li{margin-top:14px;padding-top:14px;border-top:1px solid var(--line)}
.hot-list a{display:block;font-size:14.5px;color:var(--text-2);line-height:1.6}
.hot-list a:hover{color:var(--accent)}
.hot-list .time{display:block;margin-top:6px;font-size:12.5px;color:var(--text-3);font-family:var(--mono)}

/* ---------- 相关推荐 ---------- */
.related{padding:72px 0 80px;background:var(--bg-3);border-top:1px solid var(--line)}
.section-head{margin-bottom:34px}
.section-head .eyebrow{display:inline-block;font-size:12px;letter-spacing:3px;color:var(--accent);margin-bottom:10px}
.section-head h2{font-size:clamp(22px,3vw,30px);color:#fff}
.section-head p{margin-top:10px;font-size:15px;color:var(--text-2);max-width:620px}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{display:flex;flex-direction:column;background:var(--glass);border:1px solid var(--glass-brd);border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-card);transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease}
.post-card:hover{transform:translateY(-4px);border-color:rgba(30,107,255,.45);box-shadow:var(--shadow-hover)}
.post-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:#0A1020}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.post-card:hover .post-thumb img{transform:scale(1.03)}
.post-thumb .tag{position:absolute;left:12px;top:12px;padding:4px 9px;border-radius:6px;font-size:11.5px;font-weight:600;color:#fff;background:rgba(7,11,22,.72);border:1px solid var(--glass-brd);backdrop-filter:blur(8px)}
.post-body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1}
.post-body h3{font-size:17px;line-height:1.5;color:#fff;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-body p{margin-top:10px;font-size:14.5px;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-foot{margin-top:auto;padding-top:16px;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-3)}
.post-foot .more{color:var(--accent);font-weight:600}
.post-card:hover .post-foot .more{color:var(--primary)}
.back-links{display:flex;flex-wrap:wrap;gap:14px;margin-top:40px}

/* ---------- CTA 带 ---------- */
.cta-band{padding:72px 0;background:var(--bg-2);border-top:1px solid var(--line)}
.cta-card{position:relative;overflow:hidden;border-radius:20px;border:1px solid rgba(30,107,255,.34);background:linear-gradient(135deg,rgba(30,107,255,.18),rgba(23,209,192,.07));padding:44px;display:grid;grid-template-columns:1.3fr auto;gap:28px;align-items:center;box-shadow:0 24px 60px rgba(0,0,0,.45)}
.cta-card::after{content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;background:radial-gradient(circle,rgba(30,107,255,.35),transparent 70%);pointer-events:none}
.cta-card h2{font-size:clamp(22px,3vw,30px);color:#fff;position:relative;z-index:2}
.cta-card p{margin-top:12px;font-size:15px;color:var(--text-2);max-width:620px;position:relative;z-index:2}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;position:relative;z-index:2}

/* ---------- 浮动 CTA ---------- */
.float-cta{position:fixed;right:28px;bottom:28px;z-index:70;opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .3s ease,transform .3s ease,visibility .3s ease}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-4);border-top:1px solid var(--line);padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand strong{font-size:16px;color:#fff}
.footer-desc{font-size:14.5px;color:var(--text-2);line-height:1.85;max-width:360px}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:16px}
.footer-col ul li+li{margin-top:10px}
.footer-col a{font-size:14.5px;color:var(--text-2)}
.footer-col a:hover{color:var(--accent)}
.footer-contact li{font-size:14.5px;color:var(--text-2);line-height:1.8}
.footer-bottom{margin-top:44px;padding-top:22px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:var(--text-3)}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  :root{--space:72px;--space-m:48px}
  .container{padding:0 24px}
  .nav-toggle{display:flex}
  .nav-links{position:absolute;top:calc(100% + 10px);left:0;right:0;flex-direction:column;align-items:stretch;gap:8px;padding:14px;margin-left:0;background:rgba(11,17,32,.98);border:1px solid var(--glass-brd);border-radius:16px;box-shadow:0 24px 60px rgba(0,0,0,.6);opacity:0;visibility:hidden;transform:translateY(-8px);transition:opacity .25s ease,transform .25s ease,visibility .25s ease}
  .nav-links.is-open{opacity:1;visibility:visible;transform:translateY(0)}
  .nav-card{justify-content:flex-start;padding:12px 14px}
  .nav-cta{display:none}
  .article-layout{grid-template-columns:1fr;gap:32px}
  .article-card{padding:32px}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .cta-card{grid-template-columns:1fr;padding:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:640px){
  .container{padding:0 20px}
  .page-hero{padding:36px 0 34px}
  .article-section{padding:40px 0 56px}
  .article-card{padding:22px}
  .prose{font-size:16px;line-height:1.85}
  .prose h2{font-size:20px}
  .card-grid{grid-template-columns:1fr}
  .related,.cta-band{padding:56px 0}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
  .float-cta{right:14px;left:14px;bottom:14px}
  .float-cta .btn{width:100%;padding:14px}
  .back-links .btn{flex:1 1 auto}
  .brand-text em{letter-spacing:2px}
}

/* roulang page: category1 */
:root{
  --bg:#070B16;
  --bg-2:#0B1120;
  --bg-3:#0E1526;
  --primary:#1E6BFF;
  --primary-soft:rgba(30,107,255,.12);
  --accent:#17D1C0;
  --point:#FFB020;
  --text:#E8EEF9;
  --muted:#9BA9C4;
  --faint:#66748F;
  --line:rgba(255,255,255,.08);
  --glass:rgba(255,255,255,.04);
  --glass-line:rgba(255,255,255,.10);
  --radius-card:16px;
  --radius-btn:999px;
  --radius-input:12px;
  --radius-badge:6px;
  --shadow-card:0 12px 32px rgba(0,0,0,.35);
  --shadow-hover:0 18px 48px rgba(30,107,255,.22);
  --sp-section:96px;
  --container:1200px;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0 0 1.2em}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35;letter-spacing:.2px}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
::selection{background:rgba(30,107,255,.4)}

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

/* Foundation grid 定制 */
.row{max-width:none;margin-left:-12px;margin-right:-12px}
.row>.columns{padding-left:12px;padding-right:12px}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  padding:16px 0;
  background:rgba(7,11,22,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.nav-panel{
  display:flex;align-items:center;gap:18px;
  padding:10px 14px;
  border-radius:20px;
  background:linear-gradient(180deg,rgba(20,28,48,.92),rgba(11,17,32,.92));
  border:1px solid var(--glass-line);
  box-shadow:var(--shadow-card);
  inset:0;
}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;
  display:flex;align-items:center;justify-content:center;
  border-radius:12px;
  font-size:19px;font-weight:700;color:#fff;
  background:linear-gradient(135deg,#1E6BFF,#17D1C0);
  box-shadow:0 0 0 1px rgba(30,107,255,.5),0 8px 24px rgba(30,107,255,.35);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{font-size:16px;font-weight:700;letter-spacing:.5px}
.brand-text em{font-style:normal;font-size:12px;color:var(--accent);letter-spacing:2px}

.nav-toggle{
  display:none;width:44px;height:40px;margin-left:auto;
  border-radius:12px;border:1px solid var(--glass-line);
  background:var(--glass);
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
  transition:background .25s ease,border-color .25s ease;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);transition:transform .25s ease,opacity .25s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav-toggle:hover{background:rgba(30,107,255,.16);border-color:rgba(30,107,255,.45)}

.nav-links{display:flex;align-items:center;gap:8px;flex:1 1 auto;flex-wrap:wrap}
.nav-card{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 15px;border-radius:12px;
  font-size:14px;color:var(--muted);
  background:var(--glass);
  border:1px solid transparent;
  transition:transform .22s ease,color .22s ease,background .22s ease,border-color .22s ease;
}
.nav-card i{font-style:normal;font-size:9px;color:var(--accent);opacity:.85}
.nav-card:hover{transform:translateY(-2px);color:var(--text);background:rgba(255,255,255,.07);border-color:var(--glass-line)}
.nav-card.is-active{
  color:#fff;background:var(--primary-soft);
  border-color:rgba(30,107,255,.55);
  box-shadow:0 8px 22px rgba(30,107,255,.18);
}
.nav-cta{flex:0 0 auto}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;letter-spacing:.3px;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn-primary{
  color:#fff;
  background:linear-gradient(135deg,#2F7BFF,#1E6BFF 55%,#0F4FD0);
  box-shadow:0 0 0 1px rgba(30,107,255,.5),0 8px 24px rgba(30,107,255,.35);
}
.btn-primary:hover{
  transform:translateY(-1px);
  filter:brightness(1.08);
  box-shadow:0 0 0 1px rgba(30,107,255,.6),0 14px 34px rgba(30,107,255,.5);
}
.btn-primary:active{transform:translateY(0);filter:brightness(.96);box-shadow:0 0 0 1px rgba(30,107,255,.4),0 6px 16px rgba(30,107,255,.28)}
.btn-ghost{
  color:var(--text);background:transparent;
  border:1px solid rgba(255,255,255,.18);
}
.btn-ghost:hover{background:var(--primary-soft);border-color:rgba(30,107,255,.6);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0);background:rgba(30,107,255,.08)}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-block{width:100%}

/* ============ Hero ============ */
.page-hero{
  position:relative;
  padding:72px 0 88px;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.page-hero-bg{
  position:absolute;inset:0;
  background-image:
    linear-gradient(180deg,rgba(7,11,22,.86) 0%,rgba(7,11,22,.94) 60%,#070B16 100%),
    radial-gradient(900px 420px at 12% 0%,rgba(30,107,255,.22),transparent 70%),
    url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  z-index:0;
}
.page-hero .container{position:relative;z-index:1}

.breadcrumb{
  display:flex;align-items:center;gap:10px;
  font-size:13px;color:var(--faint);margin-bottom:28px;flex-wrap:wrap;
}
.breadcrumb a{color:var(--muted);transition:color .2s ease}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb span{color:var(--faint)}
.breadcrumb .current{color:var(--muted)}

.hero-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,.85fr);gap:48px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 13px;border-radius:var(--radius-badge);
  font-size:12px;letter-spacing:1.4px;color:var(--accent);
  background:rgba(23,209,192,.10);
  border:1px solid rgba(23,209,192,.32);
  margin-bottom:20px;
}
.hero-copy h1{
  font-size:52px;line-height:1.15;letter-spacing:1px;margin-bottom:18px;
  background:linear-gradient(120deg,#FFFFFF 20%,#BFD5FF 70%,#17D1C0 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{font-size:19px;font-weight:600;color:var(--text);margin-bottom:14px}
.hero-desc{font-size:16px;color:var(--muted);max-width:620px;margin-bottom:28px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}

.hero-card{
  padding:26px 24px;
  border-radius:var(--radius-card);
  background:rgba(255,255,255,.04);
  border:1px solid var(--glass-line);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.hero-card-title{
  font-size:15px;font-weight:600;color:var(--muted);
  letter-spacing:1px;margin-bottom:18px;
  padding-bottom:14px;border-bottom:1px solid var(--line);
}
.stat-list li{display:flex;align-items:baseline;gap:12px;padding:10px 0;border-bottom:1px dashed rgba(255,255,255,.07)}
.stat-list li:last-child{border-bottom:0}
.stat-num{font-family:var(--mono);font-size:26px;font-weight:700;color:var(--accent);min-width:64px}
.stat-label{font-size:14px;color:var(--muted);line-height:1.6}
.hero-card-note{margin:16px 0 0;font-size:12px;color:var(--faint);line-height:1.6}

/* ============ 通用板块 ============ */
.section{padding:var(--sp-section) 0;border-top:1px solid var(--line);position:relative}
.section.alt{background:var(--bg-2)}
.section.deep{background:var(--bg-3)}
.sec-head{max-width:760px;margin-bottom:52px}
.sec-tag{
  display:inline-block;font-family:var(--mono);
  font-size:12px;letter-spacing:2px;color:var(--primary);
  margin-bottom:14px;
}
.sec-head h2{font-size:30px;margin-bottom:14px}
.sec-head p{font-size:16px;color:var(--muted);margin-bottom:0}

.badge{
  display:inline-block;padding:4px 11px;border-radius:var(--radius-badge);
  font-size:12px;letter-spacing:.6px;
  color:var(--accent);background:rgba(23,209,192,.10);
  border:1px solid rgba(23,209,192,.28);
}
.badge.blue{color:#8FB6FF;background:rgba(30,107,255,.12);border-color:rgba(30,107,255,.35)}
.badge.gold{color:var(--point);background:rgba(255,176,32,.10);border-color:rgba(255,176,32,.32)}

/* ============ 要点卡 ============ */
.point-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.point-card{
  position:relative;padding:28px 24px;
  border-radius:var(--radius-card);
  background:rgba(255,255,255,.04);
  border:1px solid var(--glass-line);
  box-shadow:var(--shadow-card);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.point-card::after{
  content:"";position:absolute;inset:0;border-radius:var(--radius-card);
  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:22px 22px;
  mask-image:linear-gradient(160deg,#000,transparent 55%);
  -webkit-mask-image:linear-gradient(160deg,#000,transparent 55%);
  pointer-events:none;opacity:.7;
}
.point-card:hover{transform:translateY(-4px);border-color:rgba(30,107,255,.45);box-shadow:var(--shadow-hover)}
.point-num{font-family:var(--mono);font-size:13px;color:var(--primary);letter-spacing:2px;display:block;margin-bottom:14px}
.point-card h3{font-size:19px;margin-bottom:10px}
.point-card p{font-size:14px;color:var(--muted);margin:0}

/* ============ 图文模块 ============ */
.split{
  display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center;
  padding:34px 0;
}
.split + .split{border-top:1px dashed rgba(255,255,255,.08)}
.split.reverse .split-media{order:2}
.split-media{
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid var(--glass-line);
  box-shadow:var(--shadow-card);
  background:var(--bg-3);
}
.split-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .5s ease}
.split-media:hover img{transform:scale(1.03)}
.split-body h3{font-size:25px;margin:14px 0 12px}
.split-body>p{color:var(--muted);font-size:15.5px}

.tick-list{margin-top:20px;display:grid;gap:12px}
.tick-list li{
  position:relative;padding-left:28px;
  font-size:15px;color:var(--muted);line-height:1.75;
}
.tick-list li::before{
  content:"";position:absolute;left:0;top:9px;
  width:14px;height:14px;border-radius:4px;
  border:1px solid rgba(23,209,192,.55);
  background:rgba(23,209,192,.14);
}
.tick-list li::after{
  content:"";position:absolute;left:4.5px;top:13px;
  width:5px;height:8px;border-right:2px solid var(--accent);border-bottom:2px solid var(--accent);
  transform:rotate(40deg);
}
.tick-list li strong{color:var(--text);font-weight:600}

/* ============ 条目卡 ============ */
.card-row{display:flex;flex-wrap:wrap;align-items:stretch}
.card-row>.columns{display:flex;margin-bottom:24px}
.entry-card{
  width:100%;display:flex;flex-direction:column;
  border-radius:var(--radius-card);
  overflow:hidden;
  background:rgba(255,255,255,.04);
  border:1px solid var(--glass-line);
  box-shadow:var(--shadow-card);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.entry-card:hover{transform:translateY(-4px);border-color:rgba(30,107,255,.45);box-shadow:var(--shadow-hover)}
.entry-thumb{position:relative;overflow:hidden;border-radius:12px 12px 0 0}
.entry-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .5s ease}
.entry-card:hover .entry-thumb img{transform:scale(1.04)}
.entry-thumb .badge{position:absolute;left:14px;top:14px;backdrop-filter:blur(6px)}
.entry-body{padding:22px 20px 20px;display:flex;flex-direction:column;flex:1 1 auto}
.entry-body h3{font-size:18px;margin-bottom:10px;line-height:1.5}
.entry-body p{
  font-size:14px;color:var(--muted);margin-bottom:18px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.entry-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding-top:14px;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--faint);
}
.entry-meta a{color:#8FB6FF;text-decoration:underline;text-underline-offset:3px;transition:color .2s ease}
.entry-meta a:hover{color:var(--accent)}

/* ============ FAQ ============ */
.faq-wrap{
  border-radius:var(--radius-card);
  background:rgba(255,255,255,.04);
  border:1px solid var(--glass-line);
  box-shadow:var(--shadow-card);
  overflow:hidden;
}
.faq-item + .faq-item{border-top:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 26px;text-align:left;
  font-size:16px;font-weight:600;color:var(--text);
  transition:background .25s ease;
}
.faq-q:hover{background:rgba(30,107,255,.09)}
.faq-q .ic{
  flex:0 0 22px;width:22px;height:22px;position:relative;
  transition:transform .3s ease;
}
.faq-q .ic::before,.faq-q .ic::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--accent);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-q .ic::before{width:14px;height:2px}
.faq-q .ic::after{width:2px;height:14px}
.faq-item.is-open .faq-q .ic{transform:rotate(45deg)}
.faq-item.is-open .faq-q{background:rgba(30,107,255,.07)}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .35s ease;
  background:rgba(255,255,255,.025);
}
.faq-item.is-open .faq-a{max-height:420px}
.faq-a-inner{padding:0 26px 24px;font-size:15px;color:var(--muted);line-height:1.85}

/* ============ CTA + 表单 ============ */
.cta-band{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:44px;align-items:center;
  padding:44px;
  border-radius:22px;
  background:
    radial-gradient(600px 260px at 0% 0%,rgba(30,107,255,.22),transparent 70%),
    radial-gradient(520px 240px at 100% 100%,rgba(23,209,192,.16),transparent 70%),
    rgba(255,255,255,.04);
  border:1px solid var(--glass-line);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
}
.cta-band h2{font-size:28px;margin-bottom:14px}
.cta-band p{color:var(--muted);font-size:15.5px;margin-bottom:22px}
.cta-list{display:grid;gap:10px;font-size:14px;color:var(--muted)}
.cta-list li{padding-left:18px;position:relative}
.cta-list li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;background:var(--point)}

.lead-form{
  padding:26px;border-radius:18px;
  background:rgba(7,11,22,.62);
  border:1px solid var(--glass-line);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:8px;letter-spacing:.5px}
.field input,.field textarea{
  width:100%;padding:12px 14px;
  border-radius:var(--radius-input);
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.14);
  color:var(--text);font-size:15px;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.field input::placeholder,.field textarea::placeholder{color:#5A6785}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);
  background:rgba(30,107,255,.08);
  box-shadow:0 0 0 3px rgba(30,107,255,.22);
}
.field textarea{resize:vertical;min-height:88px}
.form-ok{
  display:none;margin-top:14px;padding:12px 14px;border-radius:12px;
  font-size:14px;color:var(--accent);
  background:rgba(23,209,192,.10);
  border:1px solid rgba(23,209,192,.34);
}
.form-ok.is-on{display:block}
.form-note{margin:12px 0 0;font-size:12.5px;color:var(--faint)}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--bg-2);
  border-top:1px solid var(--line);
  padding:72px 0 28px;
  margin-top:0;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand strong{font-size:17px;letter-spacing:.5px}
.footer-desc{font-size:14px;color:var(--muted);max-width:340px;margin:0}
.footer-col h4{font-size:15px;margin-bottom:18px;color:var(--text);font-weight:600}
.footer-col ul{display:grid;gap:11px}
.footer-col ul a{font-size:14px;color:var(--muted);transition:color .2s ease,padding-left .2s ease}
.footer-col ul a:hover{color:var(--accent);padding-left:4px}
.footer-contact li{font-size:14px;color:var(--muted)}
.footer-bottom{
  margin-top:48px;padding-top:22px;
  border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--faint);
}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;right:26px;bottom:30px;z-index:70;
  padding:14px 26px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;color:#fff;
  background:linear-gradient(135deg,#2F7BFF,#1E6BFF 60%,#0F4FD0);
  box-shadow:0 0 0 1px rgba(30,107,255,.5),0 14px 34px rgba(30,107,255,.42);
  opacity:0;pointer-events:none;transform:translateY(14px);
  transition:opacity .3s ease,transform .3s ease,filter .2s ease;
  display:inline-flex;align-items:center;gap:9px;
}
.float-cta::before{
  content:"";width:8px;height:8px;border-radius:50%;background:#7EF7E8;
  box-shadow:0 0 10px rgba(126,247,232,.9);
}
.float-cta.is-visible{opacity:1;pointer-events:auto;transform:translateY(0)}
.float-cta:hover{filter:brightness(1.08);transform:translateY(-1px)}
.float-cta:active{transform:translateY(0);filter:brightness(.96)}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  :root{--sp-section:72px}
  .nav-toggle{display:flex}
  .nav-links{
    position:absolute;left:32px;right:32px;top:calc(100% + 10px);
    flex-direction:column;align-items:stretch;gap:8px;
    padding:14px;border-radius:18px;
    background:rgba(11,17,32,.97);
    border:1px solid var(--glass-line);
    box-shadow:var(--shadow-card);
    display:none;
  }
  .nav-links.is-open{display:flex}
  .nav-card{padding:12px 16px;font-size:15px}
  .nav-cta{display:none}
  .nav-panel{position:relative}
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .hero-copy h1{font-size:44px}
  .point-grid{grid-template-columns:1fr 1fr}
  .cta-band{grid-template-columns:1fr;padding:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .nav-links{left:20px;right:20px}
  .section{padding:56px 0}
  .sec-head{margin-bottom:34px}
  .sec-head h2{font-size:24px}
  .hero-copy h1{font-size:36px}
  .hero-sub{font-size:17px}
  .page-hero{padding:52px 0 62px}
  .point-grid{grid-template-columns:1fr}
  .split{grid-template-columns:1fr;gap:24px;padding:24px 0}
  .split.reverse .split-media{order:0}
  .split-body h3{font-size:21px}
  .faq-q{padding:18px 18px;font-size:15px}
  .faq-a-inner{padding:0 18px 20px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .card-row>.columns{width:100%}
}
@media (max-width:640px){
  .brand-text strong{font-size:15px}
  .hero-copy h1{font-size:30px;letter-spacing:.5px}
  .hero-actions .btn{width:100%}
  .cta-band{padding:24px 20px;border-radius:18px}
  .cta-band h2{font-size:22px}
  .lead-form{padding:20px}
  .float-cta{
    left:16px;right:16px;bottom:14px;
    justify-content:center;border-radius:14px;
    padding:13px 18px;font-size:15px;
  }
  .footer-bottom{flex-direction:column;gap:6px}
}

/* roulang page: category2 */
:root{
  --bg:#070B16;
  --bg-alt:#0B1120;
  --bg-alt2:#0E1526;
  --brand:#1E6BFF;
  --brand-soft:rgba(30,107,255,.14);
  --accent:#17D1C0;
  --point:#FFB020;
  --text:#E8EEF9;
  --text-2:#9BA9C4;
  --text-3:#66748F;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --glass:rgba(255,255,255,.04);
  --glass-2:rgba(255,255,255,.06);
  --r-card:16px;
  --r-btn:999px;
  --r-input:12px;
  --r-badge:6px;
  --shadow-card:0 12px 32px rgba(0,0,0,.35);
  --shadow-hover:0 18px 48px rgba(30,107,255,.22);
  --container:1200px;
  --space-section:96px;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease,box-shadow .2s ease,transform .2s ease;}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;letter-spacing:.2px;}
h2{font-size:28px;}
h3{font-size:20px;line-height:1.5;}
p{margin:0 0 1.2em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
input,textarea{font:inherit;}
body,input,textarea,select{font-family:inherit;}
::selection{background:rgba(30,107,255,.4);color:#fff;}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 32px;
}
.section{padding:var(--space-section) 0;position:relative;}
.section--alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section--alt2{background:var(--bg-alt2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:760px;margin-bottom:48px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mono);font-size:13px;letter-spacing:1.5px;
  color:var(--accent);text-transform:uppercase;
  margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--accent);display:inline-block;}
.section-head h2{font-size:32px;margin-bottom:14px;}
.section-head p{color:var(--text-2);font-size:16px;}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  padding:18px 0 0;
  background:linear-gradient(180deg,rgba(7,11,22,.96) 0%,rgba(7,11,22,.78) 70%,rgba(7,11,22,0) 100%);
  transition:padding .25s ease,background-color .25s ease;
}
.site-header.is-compact{padding:10px 0 0;}
.nav-panel{
  display:flex;align-items:center;gap:18px;
  padding:12px 16px;
  background:rgba(14,21,38,.86);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);
  border-radius:18px;
  box-shadow:0 12px 32px rgba(0,0,0,.35),inset 0 1px 0 rgba(255,255,255,.06);
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:38px;height:38px;border-radius:11px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),#17A2FF);
  color:#fff;font-weight:700;font-size:18px;
  box-shadow:0 0 0 1px rgba(30,107,255,.5),0 8px 24px rgba(30,107,255,.32);
}
.brand-text{display:flex;flex-direction:column;line-height:1.1;}
.brand-text strong{font-size:16px;font-weight:700;letter-spacing:.5px;}
.brand-text em{font-style:normal;font-size:12px;color:var(--accent);letter-spacing:2px;}
.nav-links{display:flex;align-items:center;gap:8px;flex:1 1 auto;}
.nav-card{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 15px;border-radius:12px;
  font-size:14px;color:var(--text-2);
  background:rgba(255,255,255,.03);
  border:1px solid transparent;
  white-space:nowrap;
}
.nav-card i{font-style:normal;font-size:8px;color:var(--text-3);transition:color .2s ease;}
.nav-card:hover{color:var(--text);background:rgba(255,255,255,.07);border-color:var(--line-strong);transform:translateY(-2px);}
.nav-card:hover i{color:var(--accent);}
.nav-card.is-active{
  color:#fff;background:rgba(30,107,255,.16);
  border-color:rgba(30,107,255,.55);
  box-shadow:0 0 0 1px rgba(30,107,255,.2),0 8px 20px rgba(30,107,255,.18);
}
.nav-card.is-active i{color:var(--accent);}
.nav-cta{flex:0 0 auto;}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;
  border:1px solid var(--line-strong);background:rgba(255,255,255,.04);
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform .25s ease,opacity .25s ease;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.4px;
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease;
}
.btn-primary{
  color:#fff;
  background:linear-gradient(135deg,#2C7BFF,#1E6BFF);
  box-shadow:0 0 0 1px rgba(30,107,255,.5),0 8px 24px rgba(30,107,255,.35);
}
.btn-primary:hover{background:linear-gradient(135deg,#3A85FF,#2A76FF);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(30,107,255,.6),0 12px 30px rgba(30,107,255,.45);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(30,107,255,.45),0 4px 14px rgba(30,107,255,.28);}
.btn-ghost{
  color:var(--text);background:transparent;border:1px solid var(--line-strong);
}
.btn-ghost:hover{background:rgba(30,107,255,.12);border-color:rgba(30,107,255,.6);color:#fff;transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn-block{width:100%;}

/* ============ Hero ============ */
.hero{
  position:relative;
  padding:96px 0 88px;
  margin-top:-76px;padding-top:172px;
  background-image:
    linear-gradient(180deg,rgba(7,11,22,.86) 0%,rgba(7,11,22,.72) 45%,rgba(7,11,22,.96) 100%),
    url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(120% 80% at 80% 20%,rgba(30,107,255,.22),transparent 60%);
}
.hero-inner{position:relative;z-index:2;max-width:820px;}
.breadcrumb{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-3);margin-bottom:22px;flex-wrap:wrap;}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--accent);}
.breadcrumb span.current{color:var(--text-3);}
.breadcrumb i{font-style:normal;color:var(--text-3);opacity:.7;}
.hero h1{
  font-size:56px;line-height:1.15;margin-bottom:18px;letter-spacing:.5px;
}
.hero h1 .hl{
  background:linear-gradient(120deg,#5E9BFF,#17D1C0);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{font-size:19px;color:var(--text);font-weight:600;margin-bottom:14px;}
.hero-lead{font-size:16px;color:var(--text-2);max-width:680px;margin-bottom:30px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:26px;margin-top:40px;
  padding-top:24px;border-top:1px solid var(--line);
}
.hero-meta div{min-width:120px;}
.hero-meta b{display:block;font-family:var(--mono);font-size:26px;color:var(--accent);font-weight:700;line-height:1.2;}
.hero-meta span{font-size:13px;color:var(--text-3);}

/* ============ 标签云 ============ */
.tagbar{padding:34px 0;background:var(--bg-alt);border-bottom:1px solid var(--line);}
.tagbar-inner{display:flex;align-items:center;gap:16px;flex-wrap:wrap;}
.tagbar-title{font-size:13px;color:var(--text-3);letter-spacing:1px;font-family:var(--mono);flex:0 0 auto;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 15px;border-radius:var(--r-badge);
  font-size:14px;color:var(--text-2);
  background:var(--glass);border:1px solid var(--line);
  transition:all .2s ease;
}
.tag:hover{color:#fff;border-color:rgba(23,209,192,.55);background:rgba(23,209,192,.1);transform:translateY(-2px);}

/* ============ 释义 ============ */
.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start;}
.intro-text p{color:var(--text-2);}
.intro-text p strong{color:var(--text);font-weight:600;}
.intro-list{display:grid;gap:14px;}
.intro-list li{
  display:flex;gap:14px;align-items:flex-start;
  padding:16px 18px;border-radius:14px;
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
}
.intro-list li i{
  font-style:normal;flex:0 0 auto;width:26px;height:26px;border-radius:8px;
  display:grid;place-items:center;font-size:12px;font-family:var(--mono);
  color:var(--accent);background:rgba(23,209,192,.12);border:1px solid rgba(23,209,192,.28);
}
.intro-list b{display:block;font-size:15px;font-weight:600;color:var(--text);margin-bottom:2px;}
.intro-list span{font-size:14px;color:var(--text-3);line-height:1.7;}

/* ============ 图文模块（文上图下） ============ */
.topic-block{margin-bottom:34px;padding-bottom:34px;border-bottom:1px dashed var(--line);}
.topic-block:last-child{margin-bottom:0;padding-bottom:0;border-bottom:0;}
.topic-label{
  display:inline-block;font-family:var(--mono);font-size:12px;letter-spacing:2px;
  color:var(--point);margin-bottom:12px;
}
.topic-block h3{margin-bottom:12px;font-size:22px;}
.topic-block p{color:var(--text-2);max-width:900px;}
.topic-points{display:flex;flex-wrap:wrap;gap:10px;margin:16px 0 20px;}
.chip{
  font-size:13px;color:var(--text-2);padding:6px 13px;border-radius:var(--r-badge);
  background:rgba(255,255,255,.04);border:1px solid var(--line);
}
.topic-figure{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow-card);
  background:var(--bg-alt);
}
.topic-figure img{width:100%;height:320px;object-fit:cover;transition:transform .5s ease;}
.topic-figure:hover img{transform:scale(1.03);}
.topic-figure figcaption{
  padding:12px 18px;font-size:13px;color:var(--text-3);
  background:rgba(7,11,22,.72);border-top:1px solid var(--line);
}

/* ============ 数据刻度条 ============ */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.metric{
  padding:24px 22px;border-radius:var(--r-card);
  background:var(--glass);border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
}
.metric b{display:block;font-family:var(--mono);font-size:34px;line-height:1.1;color:var(--text);font-weight:700;}
.metric b em{font-style:normal;font-size:15px;color:var(--accent);margin-left:4px;}
.metric span{display:block;font-size:14px;color:var(--text-3);margin-top:6px;}
.scale{height:5px;border-radius:99px;background:rgba(255,255,255,.07);margin-top:14px;overflow:hidden;}
.scale i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--brand),var(--accent));}

/* ============ 档位对照 ============ */
.tier-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:start;}
.tier{
  position:relative;padding:30px 26px 28px;border-radius:var(--r-card);
  background:rgba(255,255,255,.03);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  opacity:.92;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease,opacity .25s ease;
}
.tier:hover{transform:translateY(-4px);border-color:var(--line-strong);opacity:1;box-shadow:var(--shadow-hover);}
.tier--main{
  padding:44px 26px 34px;
  background:rgba(30,107,255,.08);
  border-color:rgba(30,107,255,.5);
  box-shadow:0 0 0 1px rgba(30,107,255,.35),0 18px 48px rgba(30,107,255,.2);
  opacity:1;
}
.tier-badge{
  position:absolute;top:-13px;left:26px;
  font-size:12px;font-weight:600;letter-spacing:1px;
  padding:5px 12px;border-radius:var(--r-badge);
  color:#101010;background:linear-gradient(135deg,#FFD06B,var(--point));
}
.tier h3{font-size:19px;margin-bottom:8px;}
.tier .tier-num{
  font-family:var(--mono);font-size:40px;font-weight:700;line-height:1.1;
  color:var(--text);margin:6px 0 4px;
}
.tier--main .tier-num{color:#fff;}
.tier .tier-num small{font-size:15px;color:var(--text-3);font-weight:400;margin-left:4px;}
.tier .tier-desc{font-size:14px;color:var(--text-3);min-height:44px;margin-bottom:18px;}
.tier ul{display:grid;gap:10px;margin-bottom:24px;}
.tier ul li{position:relative;padding-left:22px;font-size:14px;color:var(--text-2);line-height:1.7;}
.tier ul li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;
  background:rgba(23,209,192,.85);box-shadow:0 0 0 3px rgba(23,209,192,.12);
}
.tier--main ul li{color:var(--text);}

/* ============ 条目卡 ============ */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.post-card{
  display:flex;flex-direction:column;height:100%;
  border-radius:var(--r-card);overflow:hidden;
  background:var(--glass);border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.post-card:hover{transform:translateY(-4px);border-color:rgba(30,107,255,.45);box-shadow:var(--shadow-hover);}
.post-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-alt);}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.post-card:hover .post-thumb img{transform:scale(1.04);}
.post-thumb .tag-on{
  position:absolute;left:12px;top:12px;
  font-size:12px;padding:4px 10px;border-radius:var(--r-badge);
  color:#0A1020;background:rgba(23,209,192,.92);font-weight:600;
}
.post-body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1;}
.post-body h3{font-size:17px;line-height:1.5;margin-bottom:10px;}
.post-body h3 a:hover{color:var(--accent);}
.post-card .excerpt{
  font-size:14px;color:var(--text-3);line-height:1.75;margin-bottom:16px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  padding-top:14px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);font-family:var(--mono);
}
.post-meta a{color:var(--accent);font-family:inherit;}
.post-meta a:hover{color:#fff;}

/* ============ FAQ ============ */
.faq-wrap{max-width:880px;margin:0 auto;}
.faq-item{
  background:var(--glass);border:1px solid var(--line);
  border-radius:14px;overflow:hidden;margin-bottom:14px;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  transition:border-color .25s ease,background-color .25s ease;
}
.faq-item:hover{border-color:var(--line-strong);}
.faq-item.is-open{border-color:rgba(30,107,255,.45);background:rgba(30,107,255,.06);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 22px;text-align:left;
  font-size:16px;font-weight:600;color:var(--text);
}
.faq-q .plus{
  flex:0 0 auto;width:26px;height:26px;border-radius:8px;position:relative;
  border:1px solid var(--line-strong);transition:transform .3s ease,background-color .3s ease,border-color .3s ease;
}
.faq-q .plus::before,.faq-q .plus::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--accent);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-q .plus::before{width:12px;height:2px;}
.faq-q .plus::after{width:2px;height:12px;}
.faq-item.is-open .plus{transform:rotate(45deg);background:rgba(30,107,255,.2);border-color:rgba(30,107,255,.5);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease;}
.faq-a p{padding:0 22px 22px;font-size:15px;color:var(--text-2);}

/* ============ CTA 表单 ============ */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:22px;padding:52px;
  background:
    linear-gradient(150deg,rgba(30,107,255,.16),rgba(23,209,192,.06) 60%,rgba(255,255,255,.02)),
    var(--bg-alt2);
  border:1px solid var(--line);
  box-shadow:0 24px 60px rgba(0,0,0,.4);
}
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;position:relative;z-index:2;}
.cta-copy h2{font-size:30px;margin-bottom:14px;}
.cta-copy p{color:var(--text-2);margin-bottom:20px;}
.cta-copy ul{display:grid;gap:10px;}
.cta-copy ul li{position:relative;padding-left:22px;font-size:14px;color:var(--text-2);}
.cta-copy ul li::before{
  content:"";position:absolute;left:0;top:8px;width:8px;height:8px;border-radius:50%;
  background:var(--brand);box-shadow:0 0 0 3px rgba(30,107,255,.16);
}
.form-card{
  padding:28px;border-radius:var(--r-card);
  background:rgba(7,11,22,.6);border:1px solid var(--line-strong);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
}
.field{margin-bottom:16px;}
.field label{display:block;font-size:13px;color:var(--text-3);margin-bottom:7px;}
.field input,.field textarea{
  width:100%;padding:12px 14px;border-radius:var(--r-input);
  color:var(--text);background:rgba(255,255,255,.04);
  border:1px solid var(--line-strong);
  transition:border-color .2s ease,box-shadow .2s ease,background-color .2s ease;
}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3);}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(30,107,255,.22);
  background:rgba(255,255,255,.06);
}
.field textarea{resize:vertical;min-height:104px;}
.form-tip{font-size:12px;color:var(--text-3);margin-top:12px;text-align:center;}
.form-success{
  display:none;margin-top:14px;padding:12px 14px;border-radius:10px;
  font-size:14px;color:#B9FBF2;background:rgba(23,209,192,.12);
  border:1px solid rgba(23,209,192,.4);
}
.form-success.is-visible{display:block;}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;right:26px;bottom:28px;z-index:70;
  display:inline-flex;align-items:center;gap:9px;
  padding:13px 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;color:#fff;
  background:linear-gradient(135deg,#2C7BFF,#1E6BFF);
  box-shadow:0 0 0 1px rgba(30,107,255,.5),0 12px 32px rgba(30,107,255,.4);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .3s ease,transform .3s ease,visibility .3s ease,box-shadow .2s ease;
}
.float-cta.is-show{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(30,107,255,.6),0 18px 40px rgba(30,107,255,.5);}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--bg-alt);
  border-top:1px solid var(--line);
  padding:64px 0 26px;
  margin-top:0;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand strong{font-size:17px;letter-spacing:.5px;}
.footer-desc{font-size:14px;color:var(--text-3);line-height:1.8;max-width:320px;}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--text);}
.footer-col ul{display:grid;gap:10px;}
.footer-col ul li a,.footer-contact li{font-size:14px;color:var(--text-2);}
.footer-col ul li a:hover{color:var(--accent);}
.footer-contact li{color:var(--text-3);}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  :root{--space-section:72px;}
  .nav-toggle{display:flex;margin-left:auto;}
  .nav-links{
    position:absolute;left:16px;right:16px;top:calc(100% + 10px);
    flex-direction:column;align-items:stretch;gap:8px;
    padding:14px;border-radius:16px;
    background:rgba(11,17,32,.98);
    border:1px solid var(--line-strong);
    box-shadow:0 20px 48px rgba(0,0,0,.5);
    display:none;
  }
  .nav-links.is-open{display:flex;}
  .nav-card{justify-content:flex-start;padding:13px 16px;font-size:15px;}
  .nav-cta{display:none;}
  .hero h1{font-size:42px;}
  .intro-grid{grid-template-columns:1fr;gap:32px;}
  .metrics{grid-template-columns:repeat(2,1fr);}
  .tier-grid{grid-template-columns:1fr;gap:26px;}
  .tier--main{padding-top:38px;}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .cta-grid{grid-template-columns:1fr;gap:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:768px){
  .container{padding:0 22px;}
  .hero{padding:132px 0 64px;}
  .hero h1{font-size:34px;}
  .hero-sub{font-size:17px;}
  .section-head h2,.cta-copy h2{font-size:25px;}
  .card-grid{grid-template-columns:1fr;}
  .metrics{grid-template-columns:1fr 1fr;}
  .topic-figure img{height:230px;}
  .cta-band{padding:32px 22px;border-radius:18px;}
  .faq-q{font-size:15px;padding:17px 18px;}
  .faq-a p{padding:0 18px 18px;}
}
@media (max-width:640px){
  :root{--space-section:56px;}
  .container{padding:0 20px;}
  .hero{padding:120px 0 54px;}
  .hero h1{font-size:29px;}
  .hero-meta{gap:18px;}
  .hero-meta b{font-size:22px;}
  .hero-actions .btn{width:100%;}
  .metrics{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .float-cta{
    left:16px;right:16px;bottom:14px;justify-content:center;
    border-radius:14px;padding:14px 18px;
  }
  .site-footer{padding-bottom:96px;}
  .brand-text em{letter-spacing:1px;}
}