/* roulang page: index */
:root{
  --brand:#4B21B8;
  --brand-2:#7A3CFF;
  --brand-3:#16D2C0;
  --amber:#FFB020;
  --bg:#FFFFFF;
  --bg-alt:#F7F5FE;
  --dark:#14102A;
  --dark-2:#1D1739;
  --text:#17112B;
  --text-2:#5A5372;
  --text-3:#8A83A0;
  --line:rgba(75,33,184,.10);
  --line-2:rgba(75,33,184,.18);
  --grad:linear-gradient(120deg,#4B21B8 0%,#7A3CFF 55%,#16D2C0 130%);
  --grad-soft:linear-gradient(120deg,rgba(75,33,184,.10),rgba(22,210,192,.12));
  --r-lg:24px;
  --r-md:18px;
  --r-sm:14px;
  --r-pill:999px;
  --sh:0 6px 18px rgba(75,33,184,.08);
  --sh-hover:0 14px 34px rgba(75,33,184,.16);
  --sh-dark:0 18px 40px rgba(0,0,0,.35);
  --ease:200ms ease-out;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  color:var(--text);
  background:var(--bg);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand);text-decoration:none;transition:color var(--ease);}
a:hover{color:var(--brand-2);text-decoration:underline;text-underline-offset:3px;}
h1,h2,h3,h4{margin:0 0 .6em;letter-spacing:-.01em;font-weight:800;line-height:1.3;}
h1{font-size:44px;}
h2{font-size:30px;}
h3{font-size:21px;}
h4{font-size:17px;}
p{margin:0 0 1em;color:var(--text-2);}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:3px solid rgba(122,60,255,.55);outline-offset:2px;border-radius:6px;}
.container{max-width:1200px;margin:0 auto;padding:0 24px;}
@media (min-width:1400px){.container{max-width:1320px;}}
section{position:relative;}
.section-pad{padding:104px 0;}
.section-pad-sm{padding:72px 0;}
.bg-alt{background:var(--bg-alt);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.06em;
  color:var(--brand);background:var(--grad-soft);
  border:1px solid var(--line);border-radius:var(--r-pill);
  padding:6px 16px;margin-bottom:18px;
}
.eyebrow i{width:7px;height:7px;border-radius:50%;background:var(--brand-3);display:inline-block;}
.section-head{max-width:760px;margin-bottom:48px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section-head p{font-size:17px;margin-bottom:0;}
.text-cyan{color:var(--brand-3);}
.text-brand{color:var(--brand);}
.text-amber{color:var(--amber);}

/* ---------- 按钮 ---------- */
.btn{font-weight:700;border-radius:var(--r-pill);padding:13px 28px;font-size:15px;border:0;transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease);}
.btn-grad{background:var(--grad);color:#fff;background-size:150% 150%;box-shadow:0 8px 22px rgba(75,33,184,.28);}
.btn-grad:hover,.btn-grad:focus{color:#fff;background-position:80% 50%;transform:translateY(-2px);box-shadow:0 14px 30px rgba(75,33,184,.34);text-decoration:none;}
.btn-grad:active{transform:translateY(-1px);}
.btn-line{background:transparent;color:var(--brand);border:1.5px solid var(--line-2);}
.btn-line:hover,.btn-line:focus{background:rgba(75,33,184,.08);color:var(--brand);transform:translateY(-2px);text-decoration:none;}
.btn-ghost-light{background:rgba(255,255,255,.10);color:#fff;border:1.5px solid rgba(255,255,255,.28);}
.btn-ghost-light:hover{background:rgba(255,255,255,.18);color:#fff;text-decoration:none;}
.btn-arrow{display:inline-flex;align-items:center;gap:8px;font-weight:700;color:var(--brand);font-size:15px;}
.btn-arrow span{transition:transform var(--ease);}
.btn-arrow:hover{text-decoration:none;color:var(--brand-2);}
.btn-arrow:hover span{transform:translateX(3px);}
.btn-block-sm{width:100%;}

/* ---------- 徽章 ---------- */
.chip{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:var(--brand);background:rgba(75,33,184,.08);border-radius:var(--r-pill);padding:5px 13px;}
.chip-cyan{color:#0E8C82;background:rgba(22,210,192,.14);}
.chip-amber{color:#9A6200;background:rgba(255,176,32,.18);}
.chip-light{color:#fff;background:rgba(255,255,255,.14);}

/* ---------- 悬浮胶囊导航 ---------- */
.site-header{position:fixed;top:16px;left:0;right:0;z-index:1030;transition:top var(--ease);}
.nav-shell{
  max-width:1180px;margin:0 auto;
  display:flex;align-items:center;gap:20px;
  background:rgba(255,255,255,.82);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid rgba(255,255,255,.7);
  box-shadow:0 8px 26px rgba(75,33,184,.12);
  border-radius:var(--r-pill);
  padding:10px 12px 10px 18px;
  transition:padding var(--ease),box-shadow var(--ease),background var(--ease);
}
.site-header.shrink .nav-shell{padding:6px 10px 6px 16px;box-shadow:0 12px 32px rgba(75,33,184,.20);background:rgba(255,255,255,.94);}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand:hover{text-decoration:none;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;background:var(--grad);
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:800;font-size:15px;letter-spacing:.02em;
  box-shadow:0 6px 16px rgba(75,33,184,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text b{font-size:16px;color:var(--text);font-weight:800;letter-spacing:-.01em;}
.brand-text em{font-style:normal;font-size:11px;color:var(--text-3);letter-spacing:.04em;}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;flex-wrap:nowrap;}
.nav-link{
  font-size:14px;font-weight:600;color:var(--text-2);
  padding:8px 13px;border-radius:var(--r-pill);white-space:nowrap;
  transition:background var(--ease),color var(--ease);
}
.nav-link:hover{background:rgba(75,33,184,.08);color:var(--brand);text-decoration:none;}
.nav-link.active{background:var(--grad);color:#fff;box-shadow:0 6px 16px rgba(75,33,184,.24);}
.nav-link.active:hover{color:#fff;}
.nav-cta{flex:0 0 auto;padding:11px 22px;font-size:14px;}
.nav-toggle{
  display:none;width:42px;height:42px;border:0;border-radius:50%;
  background:rgba(75,33,184,.08);color:var(--brand);
  align-items:center;justify-content:center;flex-direction:column;gap:5px;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--brand);border-radius:2px;transition:transform var(--ease),opacity var(--ease);}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.mobile-drawer{
  position:fixed;inset:0;background:#fff;z-index:1029;
  padding:110px 28px 40px;display:none;flex-direction:column;gap:6px;
}
.mobile-drawer.open{display:flex;}
.mobile-drawer a{
  font-size:17px;font-weight:700;color:var(--text);
  padding:18px 6px;border-bottom:1px solid var(--line);
}
.mobile-drawer a:hover{text-decoration:none;color:var(--brand);}

@media (max-width:991.98px){
  .nav-links,.nav-cta{display:none;}
  .nav-toggle{display:flex;margin-left:auto;}
}

/* ---------- Hero ---------- */
.hero{padding:158px 0 96px;overflow:hidden;}
.hero-bg{
  position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(760px 420px at 12% 8%,rgba(122,60,255,.16),transparent 62%),
    radial-gradient(620px 380px at 92% 22%,rgba(22,210,192,.16),transparent 60%),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  opacity:1;
}
.hero-bg::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,rgba(255,255,255,.86) 0%,rgba(255,255,255,.94) 60%,#fff 100%);}
.hero h1{font-size:46px;margin-bottom:20px;}
.hero h1 .hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero-sub{font-size:17px;max-width:560px;color:var(--text-2);}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin:28px 0 34px;}
.hero-stats{display:flex;flex-wrap:wrap;gap:16px;}
.stat{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:14px 20px;box-shadow:var(--sh);min-width:132px;
  border-left:3px solid transparent;
  border-image:linear-gradient(180deg,#4B21B8,#16D2C0) 1;
  border-image-slice:0 0 0 1;
}
.stat b{display:block;font-size:29px;font-variant-numeric:tabular-nums;font-weight:800;color:var(--brand);line-height:1.1;}
.stat span{font-size:13px;color:var(--text-3);}
.hero-visual{position:relative;padding-bottom:56px;padding-right:38px;}
.hero-visual .main-img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:28px;
  box-shadow:0 24px 54px rgba(75,33,184,.24);
}
.float-card{
  position:absolute;left:-14px;bottom:96px;
  background:#fff;border-radius:var(--r-md);padding:14px 18px;
  box-shadow:var(--sh-hover);border:1px solid var(--line);
}
.float-card b{display:block;font-size:24px;font-weight:800;color:var(--amber);font-variant-numeric:tabular-nums;line-height:1.15;}
.float-card span{font-size:12px;color:var(--text-3);}
.float-thumb{
  position:absolute;right:0;bottom:0;width:168px;height:120px;object-fit:cover;
  border-radius:20px;border:5px solid #fff;box-shadow:var(--sh-hover);
}

/* ---------- 卡片通用 ---------- */
.card-soft{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px;box-shadow:var(--sh);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.card-soft:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:var(--line-2);}
.card-ico{
  width:52px;height:52px;border-radius:16px;background:var(--grad);
  display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:18px;
  margin-bottom:18px;box-shadow:0 8px 18px rgba(75,33,184,.24);
}
.card-soft h3{margin-bottom:12px;}
.feat-list{margin-top:16px;}
.feat-list li{position:relative;padding-left:24px;font-size:15px;color:var(--text-2);margin-bottom:9px;}
.feat-list li::before{
  content:'';position:absolute;left:0;top:9px;width:11px;height:11px;border-radius:50%;
  background:var(--grad);opacity:.85;
}
.feat-list.tick li::before{
  border-radius:4px;width:12px;height:12px;top:8px;
  background:rgba(22,210,192,.9);
}
.feat-big{
  border-radius:var(--r-lg);padding:34px;height:100%;
  background:#fff;border:1px solid var(--line);
  position:relative;overflow:hidden;box-shadow:var(--sh);
}
.feat-big::before{
  content:'';position:absolute;inset:0;border-radius:var(--r-lg);padding:2px;
  background:var(--grad);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;
}
.feat-big h3{font-size:24px;}
.feat-side{display:flex;flex-direction:column;gap:24px;height:100%;}
.feat-side .card-soft:first-child{padding-bottom:34px;}
.feat-side .card-soft:last-child{margin-top:auto;background:var(--bg-alt);}

/* ---------- 图文交错 ---------- */
.zigzag-row{align-items:center;margin-bottom:72px;}
.zigzag-row:last-child{margin-bottom:0;}
.zigzag-media{position:relative;}
.zigzag-media img{width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:20px;box-shadow:var(--sh-hover);}
.zigzag-media::after{
  content:'';position:absolute;right:-18px;bottom:-18px;width:130px;height:130px;z-index:-1;
  border-radius:24px;background-image:linear-gradient(rgba(75,33,184,.16) 1px,transparent 1px),linear-gradient(90deg,rgba(75,33,184,.16) 1px,transparent 1px);
  background-size:14px 14px;
}
.zigzag-row.rev .zigzag-media::after{right:auto;left:-18px;}
.zigzag-body h3{font-size:25px;margin:14px 0 12px;}

/* ---------- 证据区（深色） ---------- */
.dark-zone{background:var(--dark);color:#fff;border-radius:40px;margin:0 24px;}
.dark-zone h2,.dark-zone h3,.dark-zone h4{color:#fff;}
.dark-zone p{color:rgba(255,255,255,.72);}
.dark-zone .eyebrow{background:rgba(255,255,255,.10);color:#fff;border-color:rgba(255,255,255,.18);}
.proof-img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:24px;box-shadow:var(--sh-dark);}
.quote-card{
  background:var(--dark-2);border:1px solid rgba(255,255,255,.10);
  border-radius:var(--r-lg);padding:32px;box-shadow:var(--sh-dark);height:100%;
}
.quote-card blockquote{margin:0 0 20px;font-size:19px;line-height:1.85;color:#fff;font-weight:600;}
.proof-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin:56px 0 40px;}
.proof-stat{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.10);border-radius:var(--r-md);padding:22px 20px;}
.proof-stat b{display:block;font-size:32px;font-weight:800;font-variant-numeric:tabular-nums;color:var(--amber);line-height:1.1;}
.proof-stat span{font-size:13px;color:rgba(255,255,255,.62);}
.review-card{
  background:var(--dark-2);border:1px solid rgba(255,255,255,.10);
  border-radius:var(--r-md);padding:24px;height:100%;
}
.review-top{display:flex;align-items:center;gap:12px;margin-bottom:14px;}
.avatar{width:44px;height:44px;border-radius:50%;background:var(--grad);display:flex;align-items:center;justify-content:center;font-weight:800;color:#fff;font-size:15px;}
.review-top b{display:block;font-size:15px;color:#fff;}
.review-top em{font-style:normal;font-size:12px;color:rgba(255,255,255,.55);}
.stars{color:var(--amber);font-size:14px;letter-spacing:2px;margin-bottom:8px;}
.review-card p{font-size:14.5px;margin:0;color:rgba(255,255,255,.72);}

/* ---------- 方案 ---------- */
.plan-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:32px;height:100%;box-shadow:var(--sh);
  display:flex;flex-direction:column;
  transition:transform var(--ease),box-shadow var(--ease);
}
.plan-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);}
.plan-card.recommend{
  border:2px solid transparent;
  background:linear-gradient(#fff,#fff) padding-box,var(--grad) border-box;
  transform:translateY(-12px);
  box-shadow:0 18px 44px rgba(75,33,184,.20);
}
.plan-card.recommend:hover{transform:translateY(-16px);}
.plan-name{font-size:20px;font-weight:800;margin-bottom:6px;}
.plan-val{font-size:26px;font-weight:800;color:var(--brand);font-variant-numeric:tabular-nums;margin:14px 0 6px;}
.plan-val small{font-size:13px;font-weight:600;color:var(--text-3);margin-left:6px;}
.plan-card ul{margin:20px 0 26px;flex:1;}
.plan-card ul li{font-size:15px;color:var(--text-2);padding-left:22px;position:relative;margin-bottom:11px;}
.plan-card ul li::before{content:'';position:absolute;left:0;top:9px;width:10px;height:10px;border-radius:3px;background:var(--grad);}
.plan-badge{position:absolute;top:-13px;left:32px;background:var(--grad);color:#fff;font-size:12px;font-weight:700;padding:5px 14px;border-radius:var(--r-pill);box-shadow:0 6px 16px rgba(75,33,184,.3);}
.plan-wrap{position:relative;height:100%;}

/* ---------- 资讯列表 ---------- */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap;}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;}
.news-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh);
  transition:transform var(--ease),box-shadow var(--ease);
  display:flex;flex-direction:column;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);}
.news-card .thumb{overflow:hidden;aspect-ratio:16/10;background:var(--bg-alt);}
.news-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform 320ms ease-out;}
.news-card:hover .thumb img{transform:scale(1.03);}
.news-body{padding:22px 24px 20px;display:flex;flex-direction:column;flex:1;}
.news-body h3{font-size:18px;margin:12px 0 10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-body p{font-size:14.5px;margin-bottom:16px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{margin-top:auto;display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-3);border-top:1px solid var(--line);padding-top:14px;}
.news-meta .arrow{margin-left:auto;color:var(--brand);font-weight:700;transition:transform var(--ease);}
.news-card:hover .news-meta .arrow{transform:translateX(3px);}
.news-card.is-featured{grid-column:span 3;flex-direction:row;}
.news-card.is-featured .thumb{aspect-ratio:auto;width:46%;min-height:260px;}
.news-card.is-featured .news-body{padding:32px 34px;width:54%;}
.news-card.is-featured .news-body h3{font-size:23px;-webkit-line-clamp:3;}
.news-card.is-featured .news-body p{-webkit-line-clamp:3;font-size:15px;}
.empty-state{
  background:var(--bg-alt);border:1px dashed var(--line-2);border-radius:var(--r-lg);
  padding:48px 32px;text-align:center;
}
.empty-state img{width:120px;height:120px;object-fit:contain;margin:0 auto 18px;border-radius:20px;}
.empty-state p{font-size:16px;color:var(--text-2);margin-bottom:18px;}
.pager{display:flex;justify-content:center;gap:10px;margin-top:40px;}
.pager a,.pager span{
  min-width:42px;height:42px;border-radius:var(--r-pill);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700;color:var(--text-2);
  border:1px solid var(--line);background:#fff;
}
.pager a:hover{text-decoration:none;color:var(--brand);background:rgba(75,33,184,.08);}
.pager .current{background:var(--grad);color:#fff;border-color:transparent;}

/* ---------- FAQ ---------- */
.faq .accordion-item{
  border:0;background:#fff;border-radius:var(--r-md)!important;
  margin-bottom:16px;box-shadow:var(--sh);overflow:hidden;position:relative;
  transition:background var(--ease);
}
.faq .accordion-item::before{
  content:'';position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--grad);
  opacity:0;transition:opacity var(--ease);
}
.faq .accordion-item:has(.accordion-button[aria-expanded="true"])::before{opacity:1;}
.faq .accordion-item:has(.accordion-button[aria-expanded="true"]){background:#FBFAFF;}
.faq .accordion-button{
  background:transparent;color:var(--text);font-weight:700;font-size:16.5px;
  padding:22px 56px 22px 26px;box-shadow:none!important;border-radius:var(--r-md)!important;
}
.faq .accordion-button:not(.collapsed){color:var(--brand);background:transparent;}
.faq .accordion-button::after{display:none;}
.faq-plus{
  position:absolute;right:22px;top:50%;transform:translateY(-50%);
  width:26px;height:26px;border-radius:50%;
  background:rgba(75,33,184,.10);
  display:flex;align-items:center;justify-content:center;
  transition:transform var(--ease),background var(--ease);
}
.faq-plus::before,.faq-plus::after{
  content:'';position:absolute;background:var(--brand);border-radius:2px;
}
.faq-plus::before{width:12px;height:2px;}
.faq-plus::after{width:2px;height:12px;}
.faq .accordion-button[aria-expanded="true"] .faq-plus{transform:translateY(-50%) rotate(45deg);background:var(--grad);}
.faq .accordion-button[aria-expanded="true"] .faq-plus::before,
.faq .accordion-button[aria-expanded="true"] .faq-plus::after{background:#fff;}
.faq .accordion-body{padding:0 26px 24px;font-size:15px;line-height:1.85;color:var(--text-2);}

/* ---------- 联系表单 ---------- */
.contact-panel{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:32px;box-shadow:var(--sh);
}
.form-label{font-size:14px;font-weight:700;color:var(--text);margin-bottom:8px;}
.form-control,.form-select{
  border-radius:var(--r-sm);border:1px solid var(--line-2);
  padding:13px 16px;font-size:15px;color:var(--text);background:#fff;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.form-control:focus,.form-select:focus{
  border-color:var(--brand-2);box-shadow:0 0 0 4px rgba(122,60,255,.16);outline:none;
}
.form-control::placeholder{color:var(--text-3);}
.form-note{font-size:12.5px;color:var(--text-3);margin-top:10px;}
.contact-info li{display:flex;gap:14px;margin-bottom:22px;}
.contact-info .k{
  width:44px;height:44px;flex:0 0 44px;border-radius:14px;
  background:var(--grad-soft);display:flex;align-items:center;justify-content:center;
  font-weight:800;color:var(--brand);font-size:15px;
}
.contact-info b{display:block;font-size:15px;color:var(--text);}
.contact-info span{font-size:14px;color:var(--text-2);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:76px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;}
.site-footer h4{font-size:15px;color:#fff;margin-bottom:18px;font-weight:800;}
.site-footer p{color:rgba(255,255,255,.62);font-size:14px;}
.site-footer a{color:rgba(255,255,255,.72);font-size:14px;}
.site-footer a:hover{color:#fff;}
.footer-links li{margin-bottom:12px;line-height:1.5;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:18px;}
.footer-brand .brand-mark{box-shadow:0 6px 16px rgba(0,0,0,.35);}
.footer-brand b{color:#fff;font-size:16px;font-weight:800;}
.footer-bottom{
  margin-top:56px;border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.52);
}
.footer-bottom a{font-size:13px;}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:1040;
  display:flex;align-items:center;gap:10px;
  background:var(--grad);color:#fff;font-weight:700;font-size:14px;
  padding:14px 24px;border-radius:var(--r-pill);
  box-shadow:0 14px 34px rgba(75,33,184,.36);
  opacity:0;transform:translateY(14px);pointer-events:none;
  transition:opacity var(--ease),transform var(--ease);
}
.float-cta.show{opacity:1;transform:translateY(0);pointer-events:auto;}
.float-cta:hover{color:#fff;text-decoration:none;transform:translateY(-2px);}
.float-cta.dim{opacity:.34;}
.mobile-bar{display:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .news-card.is-featured{grid-column:span 2;}
  .proof-stats{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
}
@media (max-width:991.98px){
  h1{font-size:34px;}
  .hero{padding:132px 0 68px;}
  .hero h1{font-size:34px;}
  h2{font-size:25px;}
  .section-pad{padding:68px 0;}
  .section-pad-sm{padding:56px 0;}
  .dark-zone{margin:0 16px;border-radius:32px;}
  .float-thumb{width:130px;height:96px;}
  .hero-visual{padding-right:0;padding-bottom:44px;}
  .plan-card.recommend{transform:none;}
  .plan-card.recommend:hover{transform:translateY(-4px);}
  .news-card.is-featured{flex-direction:column;}
  .news-card.is-featured .thumb,.news-card.is-featured .news-body{width:100%;}
  .news-card.is-featured .thumb{aspect-ratio:16/10;min-height:0;}
}
@media (max-width:767.98px){
  .news-grid{grid-template-columns:1fr;}
  .news-card.is-featured{grid-column:span 1;}
  .proof-stats{grid-template-columns:1fr 1fr;gap:14px;}
  .footer-grid{grid-template-columns:1fr;}
  .zigzag-media{margin-bottom:26px;}
  .zigzag-row{margin-bottom:52px;}
  .float-cta{display:none;}
  .mobile-bar{
    display:flex;position:fixed;left:4%;right:4%;bottom:14px;z-index:1040;
    background:rgba(255,255,255,.94);backdrop-filter:blur(12px);
    border:1px solid var(--line);border-radius:var(--r-pill);
    padding:8px 8px 8px 20px;align-items:center;gap:12px;
    box-shadow:0 12px 30px rgba(75,33,184,.20);
    transform:translateY(120%);transition:transform var(--ease);
  }
  .mobile-bar.show{transform:translateY(0);}
  .mobile-bar span{font-size:13px;color:var(--text-2);font-weight:600;}
  .mobile-bar .btn{margin-left:auto;padding:11px 20px;font-size:13.5px;}
}
@media (max-width:575.98px){
  .container{padding:0 16px;}
  h1{font-size:29px;}
  .hero h1{font-size:29px;}
  .hero-cta .btn{width:100%;text-align:center;}
  .stat{flex:1 1 44%;min-width:0;}
  .proof-stat b{font-size:26px;}
  .card-soft,.contact-panel{padding:22px;}
  .float-card{left:0;bottom:60px;padding:11px 14px;}
  .float-card b{font-size:20px;}
}
@media (max-width:480px){
  .mobile-bar .btn{padding:10px 16px;font-size:13px;}
  .mobile-bar span{display:none;}
  .mobile-bar{padding:8px;justify-content:center;}
  .mobile-bar .btn{margin:0;width:100%;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --brand:#4B21B8;
  --brand-2:#7A3CFF;
  --cyan:#16D2C0;
  --amber:#FFB020;
  --ink:#17112B;
  --ink-2:#5A5372;
  --ink-3:#8A83A0;
  --bg:#FFFFFF;
  --bg-soft:#F7F5FE;
  --dark:#14102A;
  --line:rgba(75,33,184,.10);
  --grad:linear-gradient(120deg,#4B21B8 0%,#7A3CFF 55%,#16D2C0 130%);
  --grad-soft:linear-gradient(120deg,rgba(75,33,184,.10) 0%,rgba(22,210,192,.14) 100%);
  --r-lg:24px;
  --r-md:18px;
  --r-sm:14px;
  --sh:0 6px 18px rgba(75,33,184,.08);
  --sh-h:0 14px 34px rgba(75,33,184,.16);
  --max:1200px;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  color:var(--ink);
  background:var(--bg);
  font-size:16px;
  line-height:1.75;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .2s ease-out;}
a:hover{color:var(--brand-2);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;}
h1,h2,h3,h4,h5{color:var(--ink);font-weight:800;letter-spacing:-0.01em;margin:0;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
.container{max-width:var(--max);margin:0 auto;padding:0 24px;width:100%;}
@media (min-width:1400px){.container{max-width:1320px;}}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;font-weight:700;font-size:15px;padding:12px 26px;border:1.5px solid transparent;cursor:pointer;transition:transform .2s ease-out,box-shadow .2s ease-out,background-color .2s ease-out,color .2s ease-out;line-height:1.4;}
.btn-grad{background:var(--grad);color:#fff;box-shadow:0 8px 22px rgba(75,33,184,.24);}
.btn-grad:hover{color:#fff;filter:brightness(1.06);transform:translateY(-2px);box-shadow:0 14px 30px rgba(75,33,184,.32);text-decoration:none;}
.btn-grad:active{transform:translateY(-1px);}
.btn-line{background:transparent;color:var(--brand);border-color:var(--brand);}
.btn-line:hover{background:rgba(75,33,184,.08);color:var(--brand-2);transform:translateY(-2px);text-decoration:none;}
.btn-ghost{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.4);}
.btn-ghost:hover{background:rgba(255,255,255,.2);color:#fff;text-decoration:none;}
.btn-text{background:none;border:none;color:var(--brand);font-weight:700;padding:0;display:inline-flex;align-items:center;gap:6px;}
.btn-text i{transition:transform .2s ease-out;}
.btn-text:hover{color:var(--brand-2);text-decoration:none;}
.btn-text:hover i{transform:translateX(3px);}
:focus-visible{outline:3px solid rgba(122,60,255,.55);outline-offset:2px;border-radius:8px;}

/* ---------- 悬浮胶囊导航 ---------- */
.site-header{position:sticky;top:16px;z-index:1000;padding:0 16px;}
.nav-shell{
  max-width:1180px;margin:0 auto;display:flex;align-items:center;gap:14px;
  background:rgba(255,255,255,.74);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  border:1px solid var(--line);
  border-radius:999px;
  padding:10px 14px 10px 18px;
  box-shadow:0 8px 24px rgba(75,33,184,.10);
  transition:box-shadow .25s ease-out,padding .25s ease-out,background-color .25s ease-out;
}
.site-header.scrolled .nav-shell{padding:6px 14px 6px 16px;box-shadow:0 12px 32px rgba(75,33,184,.18);background:rgba(255,255,255,.9);}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand:hover{text-decoration:none;}
.brand-mark{
  width:40px;height:40px;border-radius:13px;background:var(--grad);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;font-weight:800;font-size:16px;letter-spacing:-.02em;
  box-shadow:0 6px 16px rgba(75,33,184,.28);flex-shrink:0;
}
.brand-text{display:flex;flex-direction:column;line-height:1.1;}
.brand-text b{font-size:16px;color:var(--ink);font-weight:800;}
.brand-text em{font-style:normal;font-size:11px;color:var(--ink-3);letter-spacing:.06em;}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto;flex-wrap:nowrap;}
.nav-link{
  font-size:14.5px;color:var(--ink-2);font-weight:600;padding:8px 12px;border-radius:999px;white-space:nowrap;
  transition:background-color .2s ease-out,color .2s ease-out;
}
.nav-link:hover{background:rgba(75,33,184,.08);color:var(--brand);text-decoration:none;}
.nav-link.active{background:var(--grad);color:#fff;box-shadow:0 6px 16px rgba(75,33,184,.24);}
.nav-link.active:hover{color:#fff;}
.nav-cta{padding:10px 20px;font-size:14.5px;flex-shrink:0;}
.nav-toggle{display:none;width:42px;height:42px;border-radius:999px;border:1px solid var(--line);background:#fff;flex-direction:column;justify-content:center;align-items:center;gap:4px;cursor:pointer;}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--brand);transition:transform .2s ease-out,opacity .2s ease-out;}

/* ---------- 面包屑 ---------- */
.crumb-bar{background:var(--bg-soft);padding:22px 0 18px;margin-top:24px;border-bottom:1px solid var(--line);}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--ink-3);}
.crumb a{color:var(--ink-2);font-weight:600;background:#fff;border:1px solid var(--line);padding:5px 12px;border-radius:999px;}
.crumb a:hover{color:var(--brand);border-color:rgba(75,33,184,.28);text-decoration:none;}
.crumb span.sep{color:var(--ink-3);}
.crumb .cur{background:var(--grad);color:#fff;padding:5px 12px;border-radius:999px;font-weight:600;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ---------- 文章头部 ---------- */
.article-head{padding:44px 0 28px;}
.article-head .col-main{max-width:860px;}
.chip{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:700;padding:6px 14px;border-radius:999px;background:var(--grad-soft);color:var(--brand);border:1px solid rgba(75,33,184,.14);}
.chip-cyan{background:rgba(22,210,192,.12);color:#0E8E83;border-color:rgba(22,210,192,.3);}
.article-head h1{font-size:40px;line-height:1.28;margin:18px 0 16px;font-weight:800;}
.article-summary{font-size:16.5px;color:var(--ink-2);line-height:1.85;margin-bottom:20px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.meta-bar{display:flex;flex-wrap:wrap;gap:8px 22px;font-size:13.5px;color:var(--ink-3);padding:16px 0 0;border-top:1px solid var(--line);}
.meta-bar i{color:var(--cyan);margin-right:6px;}
.meta-bar b{color:var(--ink-2);font-weight:600;}

/* ---------- 布局 ---------- */
.layout{display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:48px;padding:8px 0 80px;align-items:start;}
.article-figure{margin:0 0 32px;}
.article-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-lg);box-shadow:var(--sh);}
.article-figure figcaption{font-size:13px;color:var(--ink-3);text-align:center;margin-top:10px;}

.article-body{max-width:760px;font-size:17px;line-height:1.9;color:var(--ink);}
.article-body p{margin:0 0 1.2em;}
.article-body h2{font-size:22px;line-height:1.5;margin:2em 0 .8em;padding-left:14px;position:relative;}
.article-body h2::before{content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:4px;border-radius:4px;background:var(--grad);}
.article-body h3{font-size:19px;margin:1.7em 0 .7em;}
.article-body h4{font-size:17px;font-weight:800;margin:1.4em 0 .6em;}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:0;}
.article-body ul li{position:relative;padding-left:22px;margin-bottom:.5em;}
.article-body ul li::before{content:"";position:absolute;left:4px;top:.72em;width:7px;height:7px;border-radius:50%;background:var(--grad);}
.article-body ol{counter-reset:li;list-style:none;}
.article-body ol li{position:relative;padding-left:30px;margin-bottom:.5em;counter-increment:li;}
.article-body ol li::before{content:counter(li);position:absolute;left:0;top:.2em;width:20px;height:20px;border-radius:50%;background:var(--grad-soft);color:var(--brand);font-size:12px;font-weight:800;display:flex;align-items:center;justify-content:center;}
.article-body blockquote{margin:1.6em 0;padding:16px 20px;border-left:4px solid;border-image:var(--grad) 1;background:var(--bg-soft);border-radius:0 var(--r-sm) var(--r-sm) 0;color:var(--ink-2);}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:16px;margin:1.6em auto;box-shadow:var(--sh);}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px;border-radius:var(--r-sm);overflow:hidden;box-shadow:var(--sh);}
.article-body th,.article-body td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;}
.article-body th{background:var(--bg-soft);color:var(--brand);font-weight:700;}
.article-body pre{background:#1B1533;color:#EFEAFF;padding:18px;border-radius:var(--r-sm);overflow-x:auto;font-size:14px;}
.article-body code{background:var(--bg-soft);color:var(--brand);padding:2px 6px;border-radius:6px;font-size:14.5px;}
.article-body pre code{background:none;color:inherit;padding:0;}
.article-body a{border-bottom:1px solid rgba(75,33,184,.3);}

/* 空态 */
.empty-box{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--r-lg);padding:56px 28px;text-align:center;}
.empty-box img{width:120px;height:120px;object-fit:contain;margin:0 auto 18px;opacity:.85;}
.empty-box h3{font-size:20px;margin-bottom:10px;}
.empty-box p{color:var(--ink-2);font-size:15px;margin-bottom:20px;}

/* ---------- 侧栏 ---------- */
.sidebar{position:sticky;top:104px;display:flex;flex-direction:column;gap:24px;}
.side-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:22px;box-shadow:var(--sh);}
.side-card h3{font-size:15.5px;display:flex;align-items:center;gap:8px;margin-bottom:14px;}
.side-card h3 i{color:var(--brand);}
.toc-toggle{width:100%;display:flex;align-items:center;justify-content:space-between;background:none;border:none;padding:0;font-size:15.5px;font-weight:800;color:var(--ink);cursor:pointer;}
.toc-toggle i.fa-chevron-down{color:var(--brand);transition:transform .2s ease-out;font-size:12px;}
.toc-toggle.closed i.fa-chevron-down{transform:rotate(-90deg);}
.toc-list{margin-top:14px;display:flex;flex-direction:column;gap:2px;border-left:2px solid var(--line);}
.toc-list a{font-size:14px;color:var(--ink-2);padding:6px 0 6px 14px;border-left:2px solid transparent;margin-left:-2px;line-height:1.5;}
.toc-list a:hover{color:var(--brand);border-left-color:var(--brand);text-decoration:none;}
.toc-list a.lv3{padding-left:26px;font-size:13.2px;color:var(--ink-3);}
.toc-hint{font-size:13px;color:var(--ink-3);margin-top:10px;}
.rec-item{display:flex;gap:12px;padding:10px 0;border-bottom:1px dashed var(--line);}
.rec-item:last-child{border-bottom:none;padding-bottom:0;}
.rec-item img{width:72px;height:56px;object-fit:cover;border-radius:10px;flex-shrink:0;}
.rec-item .t{font-size:14px;font-weight:700;color:var(--ink);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rec-item:hover .t{color:var(--brand);}
.rec-item .d{font-size:12px;color:var(--ink-3);margin-top:4px;}
.rec-item:hover{text-decoration:none;}
.cat-links{display:flex;flex-wrap:wrap;gap:8px;}
.cat-links a{font-size:13px;padding:6px 13px;border-radius:999px;background:var(--bg-soft);color:var(--ink-2);border:1px solid var(--line);font-weight:600;}
.cat-links a:hover{background:var(--grad);color:#fff;border-color:transparent;text-decoration:none;}

/* ---------- 文章底部 ---------- */
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin:36px 0 0;padding-top:24px;border-top:1px solid var(--line);}
.tag-row span.lbl{font-size:13.5px;color:var(--ink-3);font-weight:700;margin-right:4px;}
.tag-row a{font-size:12.5px;padding:6px 14px;border-radius:999px;background:var(--bg-soft);color:var(--brand);border:1px solid rgba(75,33,184,.14);font-weight:600;}
.tag-row a:hover{background:var(--grad);color:#fff;border-color:transparent;text-decoration:none;}
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:28px;}
.post-nav a{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:18px 20px;box-shadow:var(--sh);transition:transform .2s ease-out,box-shadow .2s ease-out;}
.post-nav a:hover{transform:translateY(-4px);box-shadow:var(--sh-h);text-decoration:none;}
.post-nav .k{font-size:12.5px;color:var(--ink-3);font-weight:700;display:block;margin-bottom:6px;}
.post-nav .v{font-size:15.5px;font-weight:700;color:var(--ink);line-height:1.55;}
.post-nav a:hover .v{color:var(--brand);}
.post-nav .right{text-align:right;}
.back-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}

/* ---------- 相关推荐 ---------- */
.related-sec{padding:0 0 96px;}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px;}
.sec-head h2{font-size:28px;}
.sec-head p{font-size:14.5px;color:var(--ink-2);margin-top:6px;}
.related-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.card-post{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh);transition:transform .2s ease-out,box-shadow .2s ease-out;}
.card-post:hover{transform:translateY(-4px);box-shadow:var(--sh-h);text-decoration:none;}
.card-post .thumb{overflow:hidden;}
.card-post .thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .3s ease-out;}
.card-post:hover .thumb img{transform:scale(1.03);}
.card-post .body{padding:20px 22px 22px;}
.card-post .body .chip{margin-bottom:10px;}
.card-post h3{font-size:17.5px;line-height:1.55;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-post:hover h3{color:var(--brand);}
.card-post .txt{font-size:14px;color:var(--ink-2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-post .foot{display:flex;align-items:center;justify-content:space-between;margin-top:14px;font-size:12.5px;color:var(--ink-3);}

/* ---------- CTA ---------- */
.cta-band{background:var(--dark);border-radius:28px;padding:52px 44px;color:#fff;position:relative;overflow:hidden;margin-bottom:96px;}
.cta-band::after{content:"";position:absolute;right:-90px;top:-90px;width:320px;height:320px;border-radius:50%;background:radial-gradient(circle,rgba(122,60,255,.55) 0%,rgba(22,210,192,0) 70%);}
.cta-band h2{color:#fff;font-size:30px;margin-bottom:12px;position:relative;z-index:1;}
.cta-band p{color:rgba(255,255,255,.72);font-size:15.5px;max-width:640px;margin-bottom:26px;position:relative;z-index:1;}
.cta-band .row-actions{display:flex;flex-wrap:wrap;gap:14px;position:relative;z-index:1;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand b{color:#fff;font-size:16px;font-weight:800;}
.site-footer p{font-size:14px;line-height:1.9;color:rgba(255,255,255,.62);}
.site-footer h4{font-size:15px;color:#fff;margin-bottom:16px;font-weight:800;}
.footer-links li{font-size:14px;line-height:2.1;color:rgba(255,255,255,.62);}
.footer-links a{color:rgba(255,255,255,.72);}
.footer-links a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:20px 0;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.5);}

/* ---------- 浮动 CTA ---------- */
.float-cta{position:fixed;right:24px;bottom:24px;z-index:900;display:inline-flex;align-items:center;gap:10px;background:var(--grad);color:#fff;font-weight:700;font-size:14.5px;padding:13px 24px;border-radius:999px;box-shadow:0 12px 30px rgba(75,33,184,.32);opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .25s ease-out,transform .25s ease-out,visibility .25s;}
.float-cta.show{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta:hover{color:#fff;text-decoration:none;filter:brightness(1.06);}
.mobile-bar{display:none;}

@media (max-width:1199px){
  .layout{grid-template-columns:minmax(0,1fr) 320px;gap:32px;}
  .related-grid{grid-template-columns:1fr;}
}
@media (max-width:991px){
  .nav-links{
    position:fixed;left:16px;right:16px;top:86px;
    flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border:1px solid var(--line);border-radius:24px;
    padding:14px;box-shadow:0 20px 50px rgba(75,33,184,.18);
    max-height:calc(100vh - 120px);overflow-y:auto;
    display:none;
  }
  .nav-links.open{display:flex;}
  .nav-link{padding:16px 14px;border-bottom:1px solid var(--line);border-radius:14px;font-size:15px;}
  .nav-link:last-child{border-bottom:none;}
  .nav-toggle{display:flex;margin-left:auto;}
  .nav-cta{display:none;}
  .layout{grid-template-columns:1fr;gap:28px;padding-bottom:64px;}
  .sidebar{position:static;}
  .article-head h1{font-size:32px;}
  .article-head{padding:32px 0 20px;}
  .cta-band{padding:40px 26px;border-radius:24px;margin-bottom:64px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
  .post-nav{grid-template-columns:1fr;}
  .post-nav .right{text-align:left;}
  .related-sec{padding-bottom:64px;}
}
@media (max-width:575px){
  .container{padding:0 16px;}
  .site-header{top:10px;padding:0 10px;}
  .brand-text em{display:none;}
  .article-head h1{font-size:26px;}
  .article-body{font-size:16.5px;}
  .article-body h2{font-size:20px;}
  .article-body h3{font-size:18px;}
  .sec-head h2{font-size:23px;}
  .cta-band h2{font-size:23px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .btn{width:100%;}
  .cta-band .row-actions .btn,.back-row .btn{width:100%;}
  .float-cta{display:none;}
  .mobile-bar{
    display:flex;position:fixed;left:4%;bottom:14px;width:92%;z-index:950;
    align-items:center;justify-content:space-between;gap:12px;
    background:rgba(255,255,255,.96);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
    border:1px solid var(--line);border-radius:999px;padding:8px 8px 8px 18px;
    box-shadow:0 14px 34px rgba(75,33,184,.2);
    opacity:0;visibility:hidden;transform:translateY(12px);
    transition:opacity .25s ease-out,transform .25s ease-out,visibility .25s;
  }
  .mobile-bar.show{opacity:1;visibility:visible;transform:translateY(0);}
  .mobile-bar span{font-size:13px;color:var(--ink-2);font-weight:600;}
  .mobile-bar .btn{width:auto;padding:10px 20px;font-size:14px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
}

/* roulang page: category1 */
:root{
  --brand:#4B21B8;
  --brand-2:#7A3CFF;
  --cyan:#16D2C0;
  --amber:#FFB020;
  --grad:linear-gradient(120deg,#4B21B8 0%,#7A3CFF 55%,#16D2C0 130%);
  --bg:#FFFFFF;
  --bg-alt:#F7F5FE;
  --dark:#14102A;
  --ink:#17112B;
  --ink-2:#5A5372;
  --ink-3:#8A83A0;
  --line:rgba(75,33,184,.10);
  --r-lg:24px;
  --r-md:18px;
  --r-sm:14px;
  --r-pill:999px;
  --sd:0 6px 18px rgba(75,33,184,.08);
  --sd-h:0 14px 34px rgba(75,33,184,.16);
  --sd-dark:0 14px 34px rgba(0,0,0,.35);
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .2s ease,text-decoration-color .2s ease;}
a:hover{color:var(--brand-2);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;}
h1,h2,h3,h4{margin:0 0 12px;font-weight:800;letter-spacing:-0.01em;line-height:1.3;color:var(--ink);}
p{margin:0 0 14px;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:3px solid rgba(122,60,255,.55);outline-offset:2px;border-radius:6px;}
.container{max-width:1200px;padding-left:24px;padding-right:24px;}
@media (min-width:1400px){.container{max-width:1320px;}}
.section{padding:96px 0;}
.section-alt{background:var(--bg-alt);}
.sec-head{max-width:760px;margin-bottom:44px;}
.sec-head h2{font-size:32px;}
.sec-head p{color:var(--ink-2);font-size:16px;margin:0;}
.kicker{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 16px;border-radius:var(--r-pill);
  background:rgba(75,33,184,.08);color:var(--brand);
  font-size:13px;font-weight:700;letter-spacing:.02em;margin-bottom:18px;
}
.kicker i{color:var(--cyan);}
/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-pill);padding:13px 26px;font-size:15px;font-weight:700;
  line-height:1.2;border:1.5px solid transparent;cursor:pointer;
  transition:transform .2s ease-out,box-shadow .2s ease-out,background-color .2s ease-out,color .2s ease-out,filter .2s ease-out;
}
.btn:hover{text-decoration:none;}
.btn-grad{background:var(--grad);color:#fff;box-shadow:0 8px 20px rgba(75,33,184,.22);}
.btn-grad:hover{color:#fff;filter:brightness(1.06);transform:translateY(-2px);box-shadow:0 16px 32px rgba(75,33,184,.3);}
.btn-grad:active{transform:translateY(-1px);}
.btn-ghost{background:transparent;border-color:rgba(75,33,184,.45);color:var(--brand);}
.btn-ghost:hover{background:rgba(75,33,184,.08);color:var(--brand-2);border-color:var(--brand-2);transform:translateY(-2px);}
.btn-sm{padding:10px 20px;font-size:14px;}
.btn-text{display:inline-flex;align-items:center;gap:6px;font-weight:700;font-size:14px;color:var(--brand);}
.btn-text i{transition:transform .2s ease-out;}
.btn-text:hover i{transform:translateX(3px);}
/* 徽章 */
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);
  background:rgba(75,33,184,.08);color:var(--brand);
  font-size:12px;font-weight:700;letter-spacing:.01em;
}
.chip-cyan{background:rgba(22,210,192,.14);color:#0d8f83;}
.chip-amber{background:rgba(255,176,32,.18);color:#8a5b00;}
/* 导航 */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1030;padding:16px 0;transition:padding .25s ease-out;}
.nav-shell{
  max-width:1180px;margin:0 auto;
  display:flex;align-items:center;gap:16px;
  background:rgba(255,255,255,.78);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  padding:10px 14px 10px 18px;
  box-shadow:0 10px 30px rgba(23,17,43,.08);
  transition:box-shadow .25s ease-out,padding .25s ease-out;
}
.site-header.is-scrolled{padding:8px 0;}
.site-header.is-scrolled .nav-shell{padding:7px 12px 7px 16px;box-shadow:0 14px 34px rgba(23,17,43,.16);}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand:hover{text-decoration:none;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:var(--grad);color:#fff;font-weight:800;font-size:15px;letter-spacing:-.02em;
  box-shadow:0 6px 16px rgba(75,33,184,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text b{font-size:16px;font-weight:800;color:var(--ink);}
.brand-text em{font-style:normal;font-size:11px;color:var(--ink-3);letter-spacing:.08em;}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto;flex-wrap:nowrap;}
.nav-link{
  padding:9px 13px;border-radius:var(--r-pill);
  font-size:14px;font-weight:600;color:var(--ink-2);white-space:nowrap;
  transition:background-color .2s ease-out,color .2s ease-out;
}
.nav-link:hover{background:rgba(75,33,184,.08);color:var(--brand);text-decoration:none;}
.nav-link.active{background:var(--grad);color:#fff;box-shadow:0 6px 16px rgba(75,33,184,.24);}
.nav-link.active:hover{color:#fff;}
.nav-cta{padding:11px 22px;font-size:14px;flex:0 0 auto;}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:4px;
  width:42px;height:42px;border-radius:var(--r-pill);
  background:rgba(75,33,184,.08);border:0;padding:0 11px;margin-left:auto;
}
.nav-toggle span{display:block;height:2px;border-radius:2px;background:var(--brand);transition:transform .25s ease-out,opacity .25s ease-out;}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
/* 页面主体留白 */
.page-main{padding-top:104px;}
/* 面包屑 */
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  background:rgba(75,33,184,.06);border-radius:var(--r-pill);
  padding:8px 18px;font-size:13px;color:var(--ink-2);width:fit-content;margin-bottom:24px;
}
.crumb a{color:var(--brand);font-weight:600;}
.crumb span.sep{color:var(--ink-3);}
.crumb strong{color:var(--ink);font-weight:700;}
/* 分类头部 */
.cat-hero{padding:40px 0 64px;position:relative;overflow:hidden;}
.cat-hero::before{
  content:"";position:absolute;right:-140px;top:-120px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle at 40% 40%,rgba(122,60,255,.16),rgba(22,210,192,.08) 55%,transparent 72%);
  pointer-events:none;
}
.cat-hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;position:relative;}
.cat-hero h1{font-size:44px;margin-bottom:16px;}
.cat-hero .lead{font-size:17px;color:var(--ink-2);max-width:560px;margin-bottom:26px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px;}
.hero-visual{position:relative;}
.hero-visual img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:28px;
  box-shadow:0 24px 60px rgba(75,33,184,.2);
}
.hero-float{
  position:absolute;left:-18px;bottom:26px;
  background:#fff;border-radius:var(--r-md);padding:16px 20px;
  box-shadow:0 18px 40px rgba(23,17,43,.16);border:1px solid var(--line);
  display:flex;flex-direction:column;gap:2px;min-width:150px;
}
.hero-float b{font-size:26px;font-weight:800;color:var(--brand);font-variant-numeric:tabular-nums;line-height:1.1;}
.hero-float span{font-size:12px;color:var(--ink-3);}
/* 标签条 */
.tagbar{display:flex;gap:10px;overflow-x:auto;padding:6px 2px 10px;scrollbar-width:none;}
.tagbar::-webkit-scrollbar{display:none;}
.tagbar a{
  flex:0 0 auto;padding:9px 18px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:#fff;color:var(--ink-2);
  font-size:14px;font-weight:600;box-shadow:var(--sd);
}
.tagbar a:hover{color:var(--brand);border-color:rgba(122,60,255,.4);text-decoration:none;}
.tagbar a.active{background:var(--grad);color:#fff;border-color:transparent;box-shadow:0 8px 20px rgba(75,33,184,.24);}
/* 布局 */
.layout{display:grid;grid-template-columns:262px 1fr;gap:36px;align-items:start;}
.filter-panel{
  position:sticky;top:104px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px;box-shadow:var(--sd);
}
.filter-panel h3{font-size:16px;margin-bottom:14px;}
.filter-list li + li{margin-top:4px;}
.filter-list a{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  padding:10px 12px;border-radius:var(--r-sm);font-size:14px;font-weight:600;color:var(--ink-2);
}
.filter-list a:hover{background:rgba(75,33,184,.08);color:var(--brand);text-decoration:none;}
.filter-list a.active{background:rgba(75,33,184,.1);color:var(--brand);}
.filter-list i{font-size:12px;color:var(--ink-3);}
.filter-note{
  margin-top:22px;padding:16px;border-radius:var(--r-sm);
  background:var(--bg-alt);font-size:13px;line-height:1.75;color:var(--ink-2);
}
.filter-note b{display:block;color:var(--ink);font-size:14px;margin-bottom:6px;}
/* 卡片栅格 */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.ch-card{
  display:flex;flex-direction:column;height:100%;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sd);
  transition:transform .25s ease-out,box-shadow .25s ease-out;
}
.ch-card:hover{transform:translateY(-4px);box-shadow:var(--sd-h);text-decoration:none;}
.ch-card .thumb{overflow:hidden;aspect-ratio:16/10;background:var(--bg-alt);}
.ch-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease-out;}
.ch-card:hover .thumb img{transform:scale(1.03);}
.ch-card .body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1;}
.ch-card h3{font-size:18px;margin:12px 0 8px;color:var(--ink);}
.ch-card p{font-size:14px;line-height:1.75;color:var(--ink-2);margin:0 0 18px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.ch-card .meta{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:12px;color:var(--ink-3);
}
.ch-card .meta .go{color:var(--brand);font-weight:700;display:inline-flex;align-items:center;gap:5px;font-size:12px;}
/* 流程 */
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.step-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px 24px;box-shadow:var(--sd);position:relative;overflow:hidden;
}
.step-card::after{
  content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--grad);
}
.step-num{
  width:36px;height:36px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:rgba(75,33,184,.08);color:var(--brand);font-weight:800;font-size:15px;margin-bottom:14px;
}
.step-card h3{font-size:17px;}
.step-card p{font-size:14px;color:var(--ink-2);margin:0;}
/* 深色面板 */
.panel-dark{
  background:var(--dark);border-radius:28px;padding:52px 48px;color:#fff;
  box-shadow:var(--sd-dark);position:relative;overflow:hidden;
}
.panel-dark::before{
  content:"";position:absolute;right:-80px;top:-80px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(122,60,255,.4),transparent 68%);
}
.panel-dark h2{color:#fff;font-size:30px;}
.panel-dark p{color:rgba(255,255,255,.72);font-size:15px;max-width:640px;}
.panel-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:44px;align-items:center;position:relative;}
.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:34px;}
.stat{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);
  border-radius:var(--r-md);padding:18px 16px;
}
.stat b{display:block;font-size:30px;font-weight:800;color:var(--amber);font-variant-numeric:tabular-nums;line-height:1.15;}
.stat span{font-size:13px;color:rgba(255,255,255,.66);}
.dark-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:14px 0;border-bottom:1px solid rgba(255,255,255,.12);font-size:15px;color:rgba(255,255,255,.86);
}
.dark-list li:last-child{border-bottom:0;}
.dark-list i{color:var(--cyan);margin-top:5px;}
/* FAQ */
.faq-list{display:grid;gap:14px;}
.faq-list .accordion-item{border:0;background:transparent;}
.accordion-button{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sd);
  font-size:17px;font-weight:700;color:var(--ink);padding:20px 24px;
  transition:background-color .2s ease-out,box-shadow .2s ease-out;
}
.accordion-button:not(.collapsed){
  background:#FBF9FF;color:var(--brand);box-shadow:var(--sd-h);
  border-radius:var(--r-lg) var(--r-lg) 0 0;
}
.accordion-button:focus{box-shadow:0 0 0 3px rgba(122,60,255,.28);border-color:transparent;}
.accordion-button::after{
  content:"";width:24px;height:24px;flex:0 0 24px;margin-left:16px;
  border-radius:50%;
  background-image:linear-gradient(#fff,#fff),linear-gradient(#fff,#fff),var(--grad);
  background-size:11px 2px,2px 11px,100% 100%;
  background-position:center,center,center;
  background-repeat:no-repeat;
  transition:transform .25s ease-out;
}
.accordion-button:not(.collapsed)::after{transform:rotate(45deg);}
.accordion-collapse{border:1px solid var(--line);border-top:0;border-radius:0 0 var(--r-lg) var(--r-lg);background:#FBF9FF;}
.accordion-button:not(.collapsed)+.accordion-collapse{position:relative;}
.accordion-body{padding:6px 26px 24px;font-size:15px;line-height:1.8;color:var(--ink-2);}
.accordion-collapse .accordion-body{border-left:4px solid transparent;border-image:var(--grad) 1;}
/* 相关分类 */
.related-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.related-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px;box-shadow:var(--sd);display:flex;flex-direction:column;gap:10px;
  transition:transform .25s ease-out,box-shadow .25s ease-out;
}
.related-card:hover{transform:translateY(-4px);box-shadow:var(--sd-h);text-decoration:none;}
.related-card h3{font-size:20px;margin:0;}
.related-card p{font-size:14px;color:var(--ink-2);margin:0;}
.related-card .go{font-size:14px;font-weight:700;color:var(--brand);display:inline-flex;align-items:center;gap:6px;margin-top:8px;}
.related-card:hover .go i{transform:translateX(3px);}
.related-card .go i{transition:transform .2s ease-out;}
/* CTA */
.cta-band{
  background:var(--grad);border-radius:28px;padding:56px 48px;color:#fff;
  display:grid;grid-template-columns:1.3fr 1fr;gap:36px;align-items:center;
  box-shadow:0 24px 60px rgba(75,33,184,.28);
}
.cta-band h2{color:#fff;font-size:30px;}
.cta-band p{color:rgba(255,255,255,.86);font-size:15px;margin:0;}
.cta-band .btn-ghost{border-color:rgba(255,255,255,.75);color:#fff;}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.16);color:#fff;border-color:#fff;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end;}
/* 页脚 */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:72px 0 0;margin-top:96px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:36px;padding-bottom:52px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand b{color:#fff;font-size:16px;}
.site-footer p{font-size:14px;line-height:1.9;color:rgba(255,255,255,.6);margin:0;}
.site-footer h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px;}
.footer-links{display:grid;gap:10px;}
.footer-links a{color:rgba(255,255,255,.68);font-size:14px;line-height:1.6;}
.footer-links a:hover{color:#fff;text-decoration:none;}
.footer-links li{font-size:14px;line-height:1.7;color:rgba(255,255,255,.68);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:22px 0;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.55);
}
/* 浮动 CTA */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:1040;
  display:flex;align-items:center;gap:12px;
  background:rgba(255,255,255,.9);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border:1px solid var(--line);border-radius:var(--r-pill);
  padding:8px 8px 8px 18px;box-shadow:0 16px 40px rgba(23,17,43,.18);
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity .3s ease-out,transform .3s ease-out;
}
.float-cta.is-visible{opacity:1;transform:none;pointer-events:auto;}
.float-note{display:none;font-size:13px;color:var(--ink-2);}
/* 响应式 */
@media (max-width:1199.98px){
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .cat-hero h1{font-size:38px;}
  .steps-grid{grid-template-columns:repeat(2,1fr);}
  .panel-grid{grid-template-columns:1fr;gap:30px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:991.98px){
  .nav-toggle{display:flex;}
  .nav-cta{display:none;}
  .nav-links{
    position:fixed;left:0;right:0;top:0;bottom:0;
    flex-direction:column;align-items:flex-start;justify-content:flex-start;
    gap:20px;padding:110px 32px 48px;margin:0;
    background:rgba(255,255,255,.98);
    -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
    border-radius:0;opacity:0;transform:translateY(-10px);
    pointer-events:none;transition:opacity .25s ease-out,transform .25s ease-out;
    overflow-y:auto;z-index:1029;box-shadow:0 20px 60px rgba(23,17,43,.18);
  }
  .nav-links.is-open{opacity:1;transform:none;pointer-events:auto;}
  .nav-links .nav-link{
    font-size:17px;width:100%;padding:14px 6px;border-bottom:1px solid var(--line);
    border-radius:0;color:var(--ink);
  }
  .nav-links .nav-link.active{background:rgba(75,33,184,.1);color:var(--brand);border-radius:var(--r-pill);padding-left:16px;}
  .cat-hero-grid{grid-template-columns:1fr;gap:34px;}
  .layout{grid-template-columns:1fr;gap:26px;}
  .filter-panel{position:static;}
  .filter-list{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px;}
  .filter-list li+li{margin-top:0;}
  .filter-list a{white-space:nowrap;border:1px solid var(--line);}
  .filter-note{margin-top:18px;}
  .cta-band{grid-template-columns:1fr;padding:40px 30px;}
  .cta-actions{justify-content:flex-start;}
  .section{padding:64px 0;}
}
@media (max-width:767.98px){
  body{font-size:15px;}
  .page-main{padding-top:92px;}
  .container{padding-left:16px;padding-right:16px;}
  .cat-hero{padding:24px 0 40px;}
  .cat-hero h1{font-size:30px;}
  .cat-hero .lead{font-size:15.5px;}
  .sec-head h2{font-size:26px;}
  .card-grid{grid-template-columns:1fr;gap:20px;}
  .steps-grid{grid-template-columns:1fr;}
  .stat-row{grid-template-columns:repeat(2,1fr);}
  .related-grid{grid-template-columns:1fr;}
  .panel-dark{padding:34px 24px;border-radius:24px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .section{padding:56px 0;}
  .float-cta{
    right:auto;left:50%;bottom:14px;width:92%;
    transform:translate(-50%,12px);justify-content:space-between;padding:10px 10px 10px 20px;
  }
  .float-cta.is-visible{transform:translate(-50%,0);}
  .float-note{display:inline;}
  .float-cta .btn{flex:0 0 auto;padding:11px 22px;}
}
@media (max-width:480px){
  .cat-hero h1{font-size:26px;}
  .hero-actions .btn{width:100%;}
  .brand-text em{font-size:10px;}
  .hero-float{left:8px;bottom:12px;padding:12px 16px;}
  .stat b{font-size:26px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
}

/* roulang page: category2 */
:root{
  --brand:#4B21B8;
  --brand-2:#7A3CFF;
  --cyan:#16D2C0;
  --amber:#FFB020;
  --grad:linear-gradient(120deg,#4B21B8 0%,#7A3CFF 55%,#16D2C0 130%);
  --bg:#FFFFFF;
  --bg-soft:#F7F5FE;
  --dark:#14102A;
  --text:#17112B;
  --text-2:#5A5372;
  --text-3:#8A83A0;
  --line:rgba(75,33,184,.10);
  --r-lg:24px;
  --r-md:18px;
  --r-sm:14px;
  --sh:0 6px 18px rgba(75,33,184,.08);
  --sh-hover:0 14px 34px rgba(75,33,184,.16);
  --ease:200ms ease-out;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:17px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-md);object-fit:cover;}
a{color:var(--brand);text-decoration:none;transition:color var(--ease),background var(--ease),transform var(--ease);}
a:hover{color:var(--brand-2);text-decoration:underline;text-underline-offset:3px;}
h1,h2,h3,h4{font-weight:800;letter-spacing:-.01em;line-height:1.3;margin:0;color:var(--text);}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid rgba(122,60,255,.5);outline-offset:2px;border-radius:8px;}
.container{width:100%;max-width:1200px;margin-inline:auto;padding-inline:24px;}
@media (min-width:1400px){.container{max-width:1320px;}}
@media (max-width:575px){.container{padding-inline:16px;}}

/* ---------- header ---------- */
.site-header{position:fixed;top:16px;left:0;right:0;z-index:1030;transition:top var(--ease);}
.nav-shell{
  display:flex;align-items:center;gap:14px;
  background:rgba(255,255,255,.80);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border:1px solid var(--line);
  border-radius:999px;
  padding:9px 12px 9px 14px;
  box-shadow:var(--sh);
  transition:padding var(--ease),box-shadow var(--ease),background var(--ease);
}
.site-header.scrolled .nav-shell{padding:5px 10px 5px 12px;box-shadow:0 10px 30px rgba(75,33,184,.16);background:rgba(255,255,255,.92);}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);flex:0 0 auto;}
.brand:hover{color:var(--text);text-decoration:none;}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:12px;background:var(--grad);color:#fff;
  display:grid;place-items:center;font-size:15px;font-weight:800;letter-spacing:.02em;
  box-shadow:0 6px 16px rgba(75,33,184,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text b{font-size:16px;font-weight:800;}
.brand-text em{font-style:normal;font-size:11px;color:var(--text-3);letter-spacing:.06em;}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto;overflow-x:auto;scrollbar-width:none;}
.nav-links::-webkit-scrollbar{display:none;}
.nav-link{
  display:inline-block;padding:8px 12px;border-radius:999px;font-size:14px;color:var(--text-2);
  white-space:nowrap;transition:background var(--ease),color var(--ease);
}
.nav-link:hover{background:rgba(75,33,184,.08);color:var(--brand);text-decoration:none;}
.nav-link.active{background:var(--grad);color:#fff;box-shadow:0 6px 14px rgba(75,33,184,.24);}
.nav-cta{flex:0 0 auto;padding:10px 20px;font-size:14px;}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:50%;border:1px solid var(--line);
  background:#fff;flex-direction:column;justify-content:center;align-items:center;gap:4px;cursor:pointer;
}
.nav-toggle span{display:block;width:17px;height:2px;border-radius:2px;background:var(--brand);transition:transform var(--ease),opacity var(--ease);}
.nav-toggle.open span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* ---------- buttons ---------- */
.btn{border-radius:999px;font-weight:700;transition:transform var(--ease),box-shadow var(--ease),filter var(--ease),background var(--ease),color var(--ease);}
.btn-grad{
  background:var(--grad);color:#fff;border:none;padding:12px 26px;font-size:15px;
  box-shadow:0 8px 20px rgba(75,33,184,.24);
}
.btn-grad:hover,.btn-grad:focus{color:#fff;filter:brightness(1.06);transform:translateY(-2px);box-shadow:0 14px 30px rgba(75,33,184,.32);text-decoration:none;}
.btn-grad:active{transform:translateY(1px);}
.btn-line{
  background:transparent;color:var(--brand);border:1.5px solid rgba(75,33,184,.35);
  padding:11px 24px;font-size:15px;
}
.btn-line:hover{background:rgba(75,33,184,.08);color:var(--brand);text-decoration:none;transform:translateY(-2px);}
.btn-line:active{transform:translateY(1px);}
.text-link{font-weight:700;font-size:15px;display:inline-flex;align-items:center;gap:6px;color:var(--brand);}
.text-link i{font-style:normal;transition:transform var(--ease);}
.text-link:hover{color:var(--brand-2);text-decoration:none;}
.text-link:hover i{transform:translateX(3px);}

/* ---------- chips ---------- */
.chip{
  display:inline-flex;align-items:center;padding:5px 13px;border-radius:999px;
  font-size:13px;font-weight:600;background:rgba(75,33,184,.08);color:var(--brand);
}
.chip-cyan{background:rgba(22,210,192,.14);color:#0E8E82;}
.chip-amber{background:rgba(255,176,32,.16);color:#9A6200;}

/* ---------- banner ---------- */
.page-banner{
  position:relative;padding:172px 0 92px;color:#fff;overflow:hidden;
  background:var(--dark) url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
}
.page-banner::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(118deg,rgba(20,16,42,.94) 0%,rgba(75,33,184,.78) 58%,rgba(22,210,192,.34) 100%);
}
.banner-inner{position:relative;z-index:2;max-width:820px;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.72);margin-bottom:22px;}
.crumb a{color:rgba(255,255,255,.88);}
.crumb a:hover{color:#fff;}
.crumb .sep{opacity:.5;}
.crumb .here{background:rgba(255,255,255,.14);border-radius:999px;padding:4px 12px;color:#fff;}
.banner-badge{
  display:inline-flex;align-items:center;gap:8px;padding:6px 16px;border-radius:999px;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.24);
  font-size:13px;letter-spacing:.04em;margin-bottom:20px;
}
.banner-badge .dot{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 4px rgba(22,210,192,.22);}
.page-banner h1{font-size:46px;line-height:1.22;color:#fff;margin-bottom:18px;}
.page-banner h1 span{background:linear-gradient(120deg,#FFFFFF 20%,#8FF3E8 90%);-webkit-background-clip:text;background-clip:text;color:transparent;}
.banner-sub{font-size:17px;line-height:1.85;color:rgba(255,255,255,.82);max-width:640px;}
.banner-stats{display:flex;flex-wrap:wrap;gap:34px;margin-top:38px;}
.banner-stat b{display:block;font-size:30px;font-weight:800;color:var(--amber);font-variant-numeric:tabular-nums;line-height:1.1;}
.banner-stat span{font-size:13px;color:rgba(255,255,255,.7);}

/* ---------- filter chips ---------- */
.tagbar{background:var(--bg-soft);border-bottom:1px solid var(--line);}
.tagbar-inner{display:flex;align-items:center;gap:12px;padding:18px 0;overflow-x:auto;scrollbar-width:none;}
.tagbar-inner::-webkit-scrollbar{display:none;}
.tagbar-label{font-size:13px;color:var(--text-3);flex:0 0 auto;}
.tag-pill{
  flex:0 0 auto;padding:7px 16px;border-radius:999px;font-size:14px;font-weight:600;
  background:#fff;border:1px solid var(--line);color:var(--text-2);white-space:nowrap;
}
.tag-pill:hover{color:var(--brand);border-color:rgba(75,33,184,.28);text-decoration:none;}
.tag-pill.on{background:var(--grad);color:#fff;border-color:transparent;box-shadow:0 6px 16px rgba(75,33,184,.22);}

/* ---------- zigzag ---------- */
.zigzag-section{padding:96px 0 72px;background:#fff;}
.section-head{max-width:720px;margin-bottom:56px;}
.section-head h2{font-size:32px;margin-bottom:14px;}
.section-head p{color:var(--text-2);font-size:16px;}
.zigzag-list{display:flex;flex-direction:column;}
.zigzag-item{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:52px;align-items:center;padding:40px 0;border-top:1px solid var(--line);
}
.zigzag-item:first-child{border-top:none;padding-top:0;}
.zigzag-item:nth-child(even) .zz-media{order:2;}
.zz-media{position:relative;}
.zz-media img{width:100%;aspect-ratio:8/5;border-radius:20px;box-shadow:var(--sh);transition:transform var(--ease),box-shadow var(--ease);}
.zigzag-item:hover .zz-media img{transform:translateY(-4px);box-shadow:var(--sh-hover);}
.zz-media::after{
  content:"";position:absolute;right:-12px;bottom:-12px;width:120px;height:120px;border-radius:20px;
  background-image:linear-gradient(rgba(75,33,184,.16) 1px,transparent 1px),linear-gradient(90deg,rgba(75,33,184,.16) 1px,transparent 1px);
  background-size:14px 14px;z-index:-1;opacity:.8;
}
.zz-body{max-width:520px;}
.zz-index{
  display:inline-grid;place-items:center;width:44px;height:44px;border-radius:14px;
  background:rgba(75,33,184,.08);color:var(--brand);font-weight:800;font-size:16px;
  font-variant-numeric:tabular-nums;margin-bottom:14px;
}
.zz-body h3{font-size:22px;margin:12px 0 12px;}
.zz-body p{color:var(--text-2);font-size:16px;margin-bottom:16px;}
.zz-points{margin-bottom:18px;}
.zz-points li{position:relative;padding-left:20px;font-size:15px;color:var(--text-2);line-height:1.9;}
.zz-points li::before{
  content:"";position:absolute;left:0;top:.72em;width:8px;height:8px;border-radius:3px;background:var(--grad);
}

/* ---------- checklist dark ---------- */
.checklist{background:var(--dark);color:#fff;padding:96px 0;position:relative;overflow:hidden;}
.checklist::before{
  content:"";position:absolute;top:-160px;right:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(122,60,255,.4),transparent 68%);
}
.ck-grid{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:56px;align-items:start;}
.ck-intro h2{font-size:32px;color:#fff;margin-bottom:16px;}
.ck-intro p{color:rgba(255,255,255,.72);font-size:16px;margin-bottom:26px;}
.checklist .chip{background:rgba(255,255,255,.12);color:#B9F5EE;}
.ck-list{display:grid;gap:14px;}
.ck-item{
  display:flex;gap:16px;padding:20px 22px;border-radius:var(--r-md);
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.10);
  transition:background var(--ease),transform var(--ease);
}
.ck-item:hover{background:rgba(255,255,255,.09);transform:translateX(4px);}
.ck-no{
  flex:0 0 40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:var(--grad);color:#fff;font-weight:800;font-size:14px;font-variant-numeric:tabular-nums;
}
.ck-item h4{font-size:17px;color:#fff;margin-bottom:6px;}
.ck-item p{font-size:14px;color:rgba(255,255,255,.68);line-height:1.8;}

/* ---------- related ---------- */
.related{padding:96px 0;background:var(--bg-soft);}
.related-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:26px;margin-bottom:36px;}
.rel-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px;box-shadow:var(--sh);transition:transform var(--ease),box-shadow var(--ease);
}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);}
.rel-card img{width:100%;aspect-ratio:16/9;margin-bottom:18px;border-radius:var(--r-md);}
.rel-card h3{font-size:20px;margin-bottom:10px;}
.rel-card p{font-size:15px;color:var(--text-2);margin-bottom:18px;}
.rel-card .text-link{margin-top:auto;}
.center-actions{text-align:center;}

/* ---------- cta band ---------- */
.cta-band{padding:0 0 96px;background:var(--bg-soft);}
.cta-box{
  border-radius:28px;padding:56px;color:#fff;position:relative;overflow:hidden;
  background:var(--grad);box-shadow:0 22px 50px rgba(75,33,184,.28);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;
}
.cta-box::after{
  content:"";position:absolute;right:-60px;bottom:-90px;width:280px;height:280px;border-radius:50%;
  background:rgba(255,255,255,.12);
}
.cta-box h2{font-size:30px;color:#fff;margin-bottom:10px;position:relative;z-index:2;}
.cta-box p{color:rgba(255,255,255,.86);font-size:16px;max-width:560px;position:relative;z-index:2;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;position:relative;z-index:2;}
.btn-white{background:#fff;color:var(--brand);border:none;padding:12px 26px;font-size:15px;}
.btn-white:hover{color:var(--brand);transform:translateY(-2px);box-shadow:0 14px 30px rgba(0,0,0,.18);text-decoration:none;}
.btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.6);padding:11px 24px;font-size:15px;}
.btn-ghost:hover{background:rgba(255,255,255,.14);color:#fff;text-decoration:none;transform:translateY(-2px);}

/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:76px 0 26px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:18px;color:#fff;}
.footer-brand b{font-size:16px;font-weight:800;color:#fff;}
.footer-brand .brand-mark{width:34px;height:34px;flex:0 0 34px;font-size:14px;border-radius:10px;}
.site-footer p{font-size:14px;line-height:2;color:rgba(255,255,255,.66);}
.site-footer h4{font-size:15px;color:#fff;margin-bottom:18px;font-weight:700;}
.footer-links li{margin-bottom:10px;}
.footer-links a{font-size:14px;color:rgba(255,255,255,.72);line-height:2.1;}
.footer-links a:hover{color:#fff;}
.footer-links li{font-size:14px;color:rgba(255,255,255,.66);}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  border-top:1px solid rgba(255,255,255,.12);padding-top:22px;font-size:13px;color:rgba(255,255,255,.55);
}

/* ---------- float cta ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:1040;
  display:flex;align-items:center;gap:14px;padding:9px 9px 9px 22px;border-radius:999px;
  background:rgba(255,255,255,.94);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border:1px solid var(--line);box-shadow:var(--sh-hover);
  opacity:0;transform:translateY(14px);pointer-events:none;
  transition:opacity var(--ease),transform var(--ease);
}
.float-cta.show{opacity:1;transform:translateY(0);pointer-events:auto;}
.float-cta .fc-text{font-size:13px;color:var(--text-2);font-weight:600;}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .page-banner h1{font-size:40px;}
  .zigzag-item{gap:36px;}
}
@media (max-width:991px){
  .nav-toggle{display:flex;margin-left:auto;}
  .nav-cta{display:none;}
  .nav-links{
    position:fixed;top:86px;left:16px;right:16px;max-height:calc(100vh - 120px);overflow-y:auto;
    flex-direction:column;align-items:stretch;background:#fff;border-radius:24px;padding:14px 18px;
    box-shadow:0 26px 60px rgba(23,17,43,.22);gap:0;margin-left:0;display:none;
  }
  .nav-links.open{display:flex;}
  .nav-link{font-size:16px;padding:16px 8px;border-bottom:1px solid var(--line);border-radius:0;}
  .nav-link:last-child{border-bottom:none;}
  .nav-link.active{background:transparent;color:var(--brand);box-shadow:none;font-weight:800;}
  .ck-grid{grid-template-columns:1fr;gap:36px;}
  .cta-box{padding:40px 28px;}
  .section-head{margin-bottom:36px;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .page-banner{padding:132px 0 62px;}
  .page-banner h1{font-size:30px;}
  .banner-sub{font-size:15px;}
  .banner-stats{gap:24px;margin-top:28px;}
  .banner-stat b{font-size:26px;}
  .zigzag-section{padding:60px 0 40px;}
  .zigzag-item{grid-template-columns:1fr;gap:20px;padding:30px 0;}
  .zigzag-item:nth-child(even) .zz-media{order:0;}
  .zz-media::after{display:none;}
  .zz-body{max-width:none;}
  .zz-index{width:38px;height:38px;font-size:14px;margin-bottom:10px;}
  .zz-body h3{font-size:20px;}
  .section-head h2,.ck-intro h2{font-size:25px;}
  .checklist{padding:60px 0;}
  .related{padding:60px 0;}
  .related-grid{grid-template-columns:1fr;gap:20px;}
  .cta-band{padding:0 0 60px;}
  .cta-box h2{font-size:23px;}
  .footer-grid{grid-template-columns:1fr;gap:30px;padding-bottom:32px;}
  .site-footer{padding:56px 0 20px;}
  .float-cta{
    left:4%;right:4%;bottom:14px;width:92%;justify-content:space-between;
    padding:10px 10px 10px 18px;border-radius:999px;
  }
  .float-cta .fc-text{font-size:12px;}
}
@media (max-width:480px){
  .brand-text em{display:none;}
  .btn-grad,.btn-line,.btn-white,.btn-ghost{width:100%;text-align:center;}
  .cta-actions{width:100%;}
  .page-banner h1{font-size:27px;}
  .banner-badge{font-size:12px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important;}
}