:root{
  --brand:#c8102e;
  --brand-2:#e8455c;
  --brand-3:#8a0a20;
  --accent:#f2b705;
  --ink:#1c1c1e;
  --ink-2:#3a3a3d;
  --muted:#6b6b70;
  --line:#e6e6ea;
  --bg:#ffffff;
  --bg-soft:#faf7f5;
  --bg-soft-2:#f4f1ee;
  --card:#ffffff;
  --glass:rgba(255,255,255,.72);
  --glass-border:rgba(255,255,255,.55);
  --shadow:0 8px 28px rgba(28,28,30,.08);
  --shadow-lg:0 18px 48px rgba(28,28,30,.14);
  --radius:16px;
  --maxw:1180px;
}
html[data-theme="dark"]{
  --ink:#f2f2f4;
  --ink-2:#d4d4d8;
  --muted:#a1a1aa;
  --line:#2b2b31;
  --bg:#121216;
  --bg-soft:#17171c;
  --bg-soft-2:#1d1d24;
  --card:#1a1a20;
  --glass:rgba(26,26,32,.72);
  --glass-border:rgba(255,255,255,.08);
  --shadow:0 8px 28px rgba(0,0,0,.5);
  --shadow-lg:0 18px 48px rgba(0,0,0,.6);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  transition:background .3s ease,color .3s ease;
}
img,svg{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .2s ease}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.35;color:var(--ink);margin:0 0 .6em;font-weight:800}
h1{font-size:2rem;letter-spacing:-.01em}
h2{font-size:1.55rem;margin-top:0}
h3{font-size:1.2rem}
h4{font-size:1.02rem}
p{margin:0 0 1em;color:var(--ink-2)}
ul,ol{padding-left:1.4em;color:var(--ink-2)}
li{margin:.35em 0}
::selection{background:var(--brand);color:#fff}
:focus-visible{outline:2px solid var(--brand-2);outline-offset:2px;border-radius:4px}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.section{padding:56px 0;border-bottom:1px solid var(--line);position:relative}
.section:nth-child(even){background:var(--bg-soft)}
.section-head{max-width:820px;margin-bottom:28px}
.section-head .eyebrow{display:inline-block;font-size:.8rem;letter-spacing:.12em;color:var(--brand);font-weight:700;text-transform:uppercase;margin-bottom:8px}
.section-head p{color:var(--muted)}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--brand);color:#fff;padding:10px 16px;z-index:9999;border-radius:0 0 8px 0}
.skip-link:focus{left:0}
/* Header */
.site-header{
  position:sticky;top:0;z-index:100;
  background:var(--glass);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease,background .3s ease;
}
.site-header.is-stuck{box-shadow:0 4px 20px rgba(0,0,0,.08)}
.header-inner{display:flex;align-items:center;gap:18px;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.12rem;color:var(--ink);flex-shrink:0}
.brand:hover{text-decoration:none}
.brand-mark{width:38px;height:38px;border-radius:10px;flex-shrink:0;transition:transform .35s cubic-bezier(.34,1.56,.64,1)}
.brand:hover .brand-mark{transform:rotate(-8deg) scale(1.06)}
.brand-text small{display:block;font-size:.66rem;font-weight:600;color:var(--muted);letter-spacing:.08em}
.main-nav{margin-left:auto;display:flex;align-items:center;gap:4px}
.main-nav a{padding:8px 12px;border-radius:8px;color:var(--ink-2);font-size:.92rem;font-weight:500;position:relative;transition:background .2s ease,color .2s ease}
.main-nav a:hover{background:var(--bg-soft-2);color:var(--brand);text-decoration:none}
.header-tools{display:flex;align-items:center;gap:8px}
.icon-btn{
  width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);background:var(--card);border-radius:10px;cursor:pointer;
  color:var(--ink-2);transition:border-color .2s ease,color .2s ease,transform .2s ease,background .2s ease;
}
.icon-btn:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.icon-btn:active{transform:scale(.94)}
.search-toggle{display:flex}
.search-panel{display:none;padding:0 0 14px}
.search-panel.is-open{display:block;animation:panelIn .25s ease}
@keyframes panelIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}
.search-form{display:flex;gap:8px}
.search-form input[type="search"]{
  flex:1;padding:11px 14px;border:1px solid var(--line);border-radius:10px;
  background:var(--card);color:var(--ink);font-size:.95rem;font-family:inherit;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search-form input[type="search"]:focus{outline:none;border-color:var(--brand-2);box-shadow:0 0 0 3px rgba(232,69,92,.18)}
.search-form button{
  padding:11px 20px;border:none;border-radius:10px;background:var(--brand);color:#fff;
  font-weight:600;cursor:pointer;font-size:.95rem;font-family:inherit;
  transition:background .2s ease,transform .2s ease;
}
.search-form button:hover{background:var(--brand-3)}
.search-form button:active{transform:scale(.96)}
.menu-toggle{display:none}
/* Hero */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(135deg,#fff5f6 0%,#fdf0e8 45%,#fff 100%);
  padding:52px 0 44px;
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(circle at 12% 18%,rgba(232,69,92,.16),transparent 42%),
    radial-gradient(circle at 88% 82%,rgba(242,183,5,.16),transparent 46%);
}
html[data-theme="dark"] .hero{background:linear-gradient(135deg,#1a1216 0%,#1c1712 45%,#121216 100%)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center;position:relative}
.hero h1{font-size:2.35rem;letter-spacing:-.01em;margin-bottom:16px}
.hero h1 .hl{
  color:var(--brand);
  background:linear-gradient(120deg,var(--brand),var(--brand-2) 60%,var(--accent));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.hero-lead{font-size:1.06rem;color:var(--ink-2);margin-bottom:14px}
.hero-answer{
  background:var(--glass);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border:1px solid var(--glass-border);border-left:4px solid var(--brand);
  border-radius:12px;padding:16px 18px;margin-bottom:22px;box-shadow:var(--shadow);
}
.hero-answer strong{color:var(--brand)}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:22px}
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border-radius:10px;
  font-weight:600;font-size:.96rem;border:1px solid transparent;cursor:pointer;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
  font-family:inherit;
}
.btn:active{transform:scale(.97)}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 8px 20px rgba(200,16,46,.28)}
.btn-primary:hover{background:linear-gradient(135deg,var(--brand-3),var(--brand));text-decoration:none;transform:translateY(-2px);box-shadow:0 12px 26px rgba(200,16,46,.36)}
.btn-ghost{background:var(--glass);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);text-decoration:none;transform:translateY(-2px)}
.hero-stats{display:flex;flex-wrap:wrap;gap:26px}
.stat .num{font-size:1.7rem;font-weight:800;color:var(--brand);line-height:1.1;font-variant-numeric:tabular-nums}
.stat .lbl{font-size:.82rem;color:var(--muted)}
.hero-visual{position:relative}
.hero-visual svg{width:100%;height:auto;border-radius:20px;box-shadow:var(--shadow-lg)}
/* Carousel */
.carousel{position:relative;border-radius:18px;overflow:hidden;box-shadow:var(--shadow-lg);background:var(--card)}
.slides{display:flex;transition:transform .55s cubic-bezier(.4,0,.2,1)}
.slide{min-width:100%;position:relative}
.slide svg{width:100%;height:auto;display:block}
.slide-caption{
  position:absolute;left:0;right:0;bottom:0;padding:44px 22px 18px;
  background:linear-gradient(to top,rgba(0,0,0,.72),transparent);color:#fff;
}
.slide-caption h3{color:#fff;font-size:1.05rem;margin-bottom:2px}
.slide-caption p{color:rgba(255,255,255,.85);font-size:.82rem;margin:0}
.carousel-dots{position:absolute;bottom:12px;right:16px;display:flex;gap:6px;z-index:2}
.carousel-dots button{
  width:8px;height:8px;border-radius:50%;border:none;background:rgba(255,255,255,.5);
  cursor:pointer;padding:0;transition:background .2s ease,width .3s ease,border-radius .3s ease;
}
.carousel-dots button:hover{background:rgba(255,255,255,.8)}
.carousel-dots button.is-active{background:#fff;width:22px;border-radius:4px}
/* Breadcrumb */
.breadcrumb{padding:14px 0;font-size:.85rem;color:var(--muted)}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;padding:0;margin:0}
.breadcrumb li::after{content:"/";margin-left:6px;color:var(--line)}
.breadcrumb li:last-child::after{content:""}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb [aria-current]{color:var(--ink-2);font-weight:600}
/* Anchor nav */
.anchor-nav{
  background:var(--glass);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);padding:12px 0;position:sticky;top:68px;z-index:90;
}
.anchor-nav ul{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0}
.anchor-nav a{
  display:inline-block;padding:6px 13px;border-radius:20px;background:var(--card);
  border:1px solid var(--line);font-size:.83rem;color:var(--ink-2);
  transition:border-color .2s ease,color .2s ease,background .2s ease,transform .2s ease;
}
.anchor-nav a:hover{border-color:var(--brand);color:var(--brand);text-decoration:none;transform:translateY(-1px)}
/* Cards & grids */
.grid{display:grid;gap:20px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow);
  transition:transform .28s cubic-bezier(.34,1.4,.64,1),border-color .25s ease,box-shadow .28s ease;
}
.card:hover{transform:translateY(-4px);border-color:var(--brand-2);box-shadow:var(--shadow-lg)}
.card h3{margin-bottom:8px}
.card p{font-size:.93rem;margin-bottom:0}
.card .icon{
  width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  margin-bottom:14px;background:linear-gradient(135deg,var(--brand),var(--brand-2));
  transition:transform .3s cubic-bezier(.34,1.56,.64,1);
}
.card:hover .icon{transform:rotate(-6deg) scale(1.08)}
.card .icon svg{width:24px;height:24px}
/* Feature list */
.feature-list{list-style:none;padding:0;margin:0;display:grid;gap:14px}
.feature-list li{
  display:flex;gap:12px;align-items:flex-start;background:var(--card);
  border:1px solid var(--line);border-radius:12px;padding:14px 16px;
  transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.feature-list li:hover{border-color:var(--brand-2);transform:translateX(3px);box-shadow:var(--shadow)}
.feature-list li svg{flex-shrink:0;width:22px;height:22px;margin-top:3px}
.feature-list strong{display:block;color:var(--ink);margin-bottom:2px}
.feature-list span{font-size:.9rem;color:var(--muted)}
/* Timeline */
.timeline{position:relative;padding-left:26px;margin:0;list-style:none}
.timeline::before{
  content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;
  background:linear-gradient(var(--brand),var(--brand-2),transparent);
}
.timeline li{position:relative;margin-bottom:22px;transition:transform .2s ease}
.timeline li:hover{transform:translateX(3px)}
.timeline li::before{
  content:"";position:absolute;left:-26px;top:6px;width:14px;height:14px;border-radius:50%;
  background:var(--brand);border:3px solid var(--bg);box-shadow:0 0 0 2px var(--brand-2);
  transition:box-shadow .2s ease,transform .2s ease;
}
.timeline li:hover::before{transform:scale(1.15);box-shadow:0 0 0 4px rgba(232,69,92,.3)}
.timeline .year{font-weight:800;color:var(--brand);font-size:.95rem}
.timeline p{margin:2px 0 0;font-size:.92rem}
/* Articles */
.article-card{
  display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);
  transition:transform .28s cubic-bezier(.34,1.4,.64,1),border-color .25s ease,box-shadow .28s ease;
}
.article-card:hover{transform:translateY(-4px);border-color:var(--brand-2);box-shadow:var(--shadow-lg)}
.article-card .thumb{aspect-ratio:16/9;overflow:hidden;background:var(--bg-soft-2)}
.article-card .thumb svg{width:100%;height:100%;object-fit:cover;transition:transform .45s cubic-bezier(.4,0,.2,1)}
.article-card:hover .thumb svg{transform:scale(1.06)}
.article-card .body{padding:18px 20px;display:flex;flex-direction:column;flex:1}
.article-card .meta{font-size:.76rem;color:var(--muted);display:flex;gap:10px;flex-wrap:wrap;margin-bottom:8px}
.article-card .meta .tag{color:var(--brand);font-weight:700}
.article-card h3{font-size:1.02rem;margin-bottom:8px;transition:color .2s ease}
.article-card:hover h3{color:var(--brand)}
.article-card p{font-size:.88rem;color:var(--muted);flex:1}
.read-more{
  font-size:.86rem;font-weight:700;color:var(--brand);display:inline-flex;align-items:center;
  gap:4px;margin-top:10px;transition:gap .2s ease;
}
.article-card:hover .read-more{gap:8px}
/* FAQ */
.faq-list{display:grid;gap:12px;max-width:900px}
.faq-item{
  background:var(--card);border:1px solid var(--line);border-radius:12px;overflow:hidden;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:var(--brand-2)}
.faq-item.is-open{border-color:var(--brand);box-shadow:var(--shadow)}
.faq-q{
  width:100%;text-align:left;background:none;border:none;padding:16px 20px;
  font-size:.98rem;font-weight:600;color:var(--ink);cursor:pointer;
  display:flex;justify-content:space-between;align-items:center;gap:14px;
  font-family:inherit;line-height:1.5;transition:color .2s ease;
}
.faq-q:hover{color:var(--brand)}
.faq-q .chev{flex-shrink:0;transition:transform .3s cubic-bezier(.4,0,.2,1);color:var(--brand)}
.faq-item.is-open .faq-q .chev{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s cubic-bezier(.4,0,.2,1)}
.faq-a-inner{padding:0 20px 18px;font-size:.92rem;color:var(--muted)}
.faq-item.is-open .faq-a{max-height:600px}
/* HowTo steps */
.steps{counter-reset:step;display:grid;gap:16px;list-style:none;padding:0;margin:0}
.steps li{
  counter-increment:step;position:relative;padding:18px 20px 18px 64px;
  background:var(--card);border:1px solid var(--line);border-radius:12px;
  transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.steps li:hover{border-color:var(--brand-2);transform:translateX(3px);box-shadow:var(--shadow)}
.steps li::before{
  content:counter(step);position:absolute;left:18px;top:16px;width:32px;height:32px;
  border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.95rem;
}
.steps strong{display:block;color:var(--ink);margin-bottom:2px}
.steps span{font-size:.9rem;color:var(--muted)}
/* Table */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:12px;background:var(--card);-webkit-overflow-scrolling:touch}
table{width:100%;border-collapse:collapse;font-size:.9rem;min-width:560px}
th,td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line)}
th{background:var(--bg-soft-2);font-weight:700;color:var(--ink)}
td{color:var(--ink-2)}
tbody tr{transition:background .2s ease}
tbody tr:hover{background:var(--bg-soft)}
tr:last-child td{border-bottom:none}
/* Testimonials */
.quote{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;position:relative;transition:transform .28s cubic-bezier(.34,1.4,.64,1),border-color .25s ease,box-shadow .28s ease;
}
.quote:hover{transform:translateY(-4px);border-color:var(--brand-2);box-shadow:var(--shadow-lg)}
.quote::before{
  content:"\201C";position:absolute;top:6px;left:16px;font-size:3rem;color:var(--brand-2);
  opacity:.25;font-family:Georgia,serif;line-height:1;
}
.quote p{font-size:.93rem;margin:14px 0 16px;color:var(--ink-2)}
.quote .who{display:flex;align-items:center;gap:10px}
.quote .avatar{width:38px;height:38px;border-radius:50%;flex-shrink:0}
.quote .who strong{display:block;font-size:.9rem;color:var(--ink)}
.quote .who span{font-size:.78rem;color:var(--muted)}
/* Contact */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:28px}
.contact-list{list-style:none;padding:0;margin:0;display:grid;gap:14px}
.contact-list li{display:flex;gap:12px;align-items:flex-start}
.contact-list svg{width:22px;height:22px;flex-shrink:0;margin-top:3px;color:var(--brand)}
.contact-list strong{display:block;font-size:.9rem;color:var(--ink)}
.contact-list span{font-size:.88rem;color:var(--muted)}
.contact-form{display:grid;gap:12px}
.contact-form label{font-size:.85rem;font-weight:600;color:var(--ink-2)}
.contact-form input,.contact-form textarea{
  width:100%;padding:11px 14px;border:1px solid var(--line);border-radius:10px;
  background:var(--bg);color:var(--ink);font-family:inherit;font-size:.92rem;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--brand-2);box-shadow:0 0 0 3px rgba(232,69,92,.18)}
.contact-form textarea{min-height:110px;resize:vertical}
/* Footer */
.site-footer{background:var(--bg-soft-2);border-top:1px solid var(--line);padding:48px 0 24px;font-size:.88rem}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px;margin-bottom:32px}
.footer-grid h4{font-size:.95rem;margin-bottom:14px;color:var(--ink)}
.footer-grid ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.footer-grid a{color:var(--muted);font-size:.86rem;transition:color .2s ease,padding-left .2s ease}
.footer-grid a:hover{color:var(--brand);padding-left:3px}
.footer-brand p{color:var(--muted);font-size:.86rem;margin:12px 0 0}
.footer-bottom{
  border-top:1px solid var(--line);padding-top:20px;display:flex;flex-wrap:wrap;
  gap:12px;justify-content:space-between;color:var(--muted);font-size:.8rem;
}
.footer-bottom nav{display:flex;flex-wrap:wrap;gap:14px}
/* Back to top */
.back-top{
  position:fixed;right:22px;bottom:22px;width:46px;height:46px;border-radius:50%;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;border:none;
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  box-shadow:0 6px 18px rgba(200,16,46,.4);opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .25s ease,visibility .25s ease,transform .25s ease,background .2s ease;z-index:120;
}
.back-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{background:linear-gradient(135deg,var(--brand-3),var(--brand));transform:translateY(-3px)}
.back-top:active{transform:scale(.94)}
/* Reveal */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}
/* Responsive */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:30px}
  .hero h1{font-size:1.9rem}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:860px){
  .grid-3{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .main-nav{display:none}
  .main-nav.is-open{
    display:flex;flex-direction:column;position:absolute;top:68px;left:0;right:0;
    background:var(--glass);
    -webkit-backdrop-filter:saturate(180%) blur(14px);backdrop-filter:saturate(180%) blur(14px);
    border-bottom:1px solid var(--line);padding:12px 20px;gap:2px;box-shadow:var(--shadow);
    animation:panelIn .25s ease;
  }
  .main-nav.is-open a{padding:12px;width:100%}
  .menu-toggle{display:inline-flex}
  .anchor-nav{top:68px}
  .anchor-nav ul{overflow-x:auto;flex-wrap:nowrap;padding-bottom:2px;scrollbar-width:none}
  .anchor-nav ul::-webkit-scrollbar{display:none}
  .anchor-nav a{white-space:nowrap}
}
@media (max-width:600px){
  .section{padding:40px 0}
  h1{font-size:1.6rem}
  .hero h1{font-size:1.55rem}
  .grid-2,.grid-4{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero-stats{gap:18px}
  .stat .num{font-size:1.4rem}
  .header-inner{height:60px}
  .main-nav.is-open{top:60px}
  .anchor-nav{top:60px}
  .back-top{right:14px;bottom:14px;width:42px;height:42px}
  .hero-answer{padding:14px 15px}
  .btn{padding:11px 20px;font-size:.92rem}
  .card{padding:18px}
}