:root{
  --brand:#c1272d;
  --brand-2:#e0434a;
  --brand-dark:#8f1c21;
  --ink:#1d1d1f;
  --muted:#5f6368;
  --line:#e6e6e6;
  --bg:#ffffff;
  --soft:#f7f5f2;
  --card:#ffffff;
  --accent:#1f6feb;
  --glass:rgba(255,255,255,.72);
  --glass-line:rgba(255,255,255,.55);
  --shadow-sm:0 2px 8px rgba(17,17,17,.05);
  --shadow-md:0 10px 30px rgba(17,17,17,.08);
  --shadow-lg:0 18px 50px rgba(193,39,45,.16);
  --radius-sm:8px;
  --radius:12px;
  --radius-lg:18px;
  --radius-pill:999px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --grad-brand:linear-gradient(135deg,#c1272d 0%,#e0434a 45%,#ff7a59 100%);
  --grad-hero:linear-gradient(135deg,#fff1ef 0%,#fde4e1 38%,#fdf6f2 68%,#ffffff 100%);
  --grad-soft:linear-gradient(180deg,#ffffff 0%,#fbf7f5 100%);
}

*{box-sizing:border-box}

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}

body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  transition:background-color .3s var(--ease),color .3s var(--ease);
}

a{color:var(--brand);text-decoration:none;transition:color .22s var(--ease),opacity .22s var(--ease)}
a:hover{text-decoration:underline}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

img,svg{max-width:100%;display:block}

.wrap{max-width:1180px;margin:0 auto;padding:0 20px}

h1,h2,h3,h4{letter-spacing:.2px;word-break:break-word}

/* ===== Header ===== */
header.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  backdrop-filter:blur(14px) saturate(160%);
  border-bottom:1px solid var(--line);
  transition:background-color .3s var(--ease),border-color .3s var(--ease);
}

.nav-bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:12px 0;
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:700;
  font-size:20px;
  color:var(--ink);
  white-space:nowrap;
}
.brand:hover{text-decoration:none;color:var(--brand)}
.brand .logo-mark{
  width:38px;
  height:38px;
  border-radius:10px;
  box-shadow:0 6px 16px rgba(193,39,45,.28);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease);
}
.brand:hover .logo-mark{transform:rotate(-6deg) scale(1.06);box-shadow:0 10px 22px rgba(193,39,45,.36)}

nav.main-nav ul{
  display:flex;
  gap:6px;
  list-style:none;
  margin:0;
  padding:0;
  flex-wrap:wrap;
}
nav.main-nav a{
  display:inline-block;
  color:var(--ink);
  font-size:14.5px;
  padding:6px 10px;
  border-radius:var(--radius-pill);
  transition:color .22s var(--ease),background-color .22s var(--ease);
}
nav.main-nav a:hover{
  color:var(--brand);
  background:rgba(193,39,45,.08);
  text-decoration:none;
}

.header-tools{display:flex;align-items:center;gap:10px}

.search-box{
  display:flex;
  align-items:center;
  gap:6px;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  padding:4px 5px 4px 10px;
  background:var(--card);
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.search-box:focus-within{
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(193,39,45,.12);
}
.search-box input{
  border:0;
  outline:0;
  font-size:14px;
  width:150px;
  background:transparent;
  color:var(--ink);
  font-family:inherit;
}
.search-box input::placeholder{color:var(--muted)}
.search-box button{
  border:0;
  background:var(--grad-brand);
  color:#fff;
  border-radius:6px;
  padding:5px 12px;
  cursor:pointer;
  font-size:13.5px;
  font-family:inherit;
  transition:filter .22s var(--ease),transform .22s var(--ease);
}
.search-box button:hover{filter:brightness(1.06);transform:translateY(-1px)}

.icon-btn{
  border:1px solid var(--line);
  background:var(--card);
  border-radius:var(--radius-sm);
  padding:6px 12px;
  cursor:pointer;
  font-size:13.5px;
  font-family:inherit;
  color:var(--ink);
  transition:border-color .22s var(--ease),color .22s var(--ease),background-color .22s var(--ease),transform .22s var(--ease);
}
.icon-btn:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}

.menu-toggle{display:none}

/* ===== Breadcrumb ===== */
.breadcrumb{
  font-size:13.5px;
  color:var(--muted);
  padding:14px 20px;
}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb span{color:var(--ink)}

/* ===== Hero ===== */
.hero{
  position:relative;
  overflow:hidden;
  background:var(--grad-hero);
  padding:56px 0 44px;
  border-bottom:1px solid var(--line);
}
.hero::before{
  content:"";
  position:absolute;
  width:520px;
  height:520px;
  right:-160px;
  top:-220px;
  background:radial-gradient(circle at center,rgba(255,122,89,.28),rgba(255,122,89,0) 68%);
  pointer-events:none;
}
.hero::after{
  content:"";
  position:absolute;
  width:420px;
  height:420px;
  left:-180px;
  bottom:-240px;
  background:radial-gradient(circle at center,rgba(193,39,45,.16),rgba(193,39,45,0) 70%);
  pointer-events:none;
}
.hero-grid{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:40px;
  align-items:center;
}
.hero h1{
  font-size:36px;
  line-height:1.28;
  margin:0 0 16px;
  font-weight:800;
}
.hero h1 .kw{
  background:var(--grad-brand);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero p.lead{
  font-size:17px;
  color:var(--muted);
  margin:0 0 22px;
  max-width:640px;
}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}

.btn{
  display:inline-block;
  padding:11px 24px;
  border-radius:10px;
  font-size:15px;
  font-weight:600;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background-color .25s var(--ease),color .25s var(--ease);
}
.btn-primary{
  background:var(--grad-brand);
  color:#fff;
  box-shadow:0 10px 24px rgba(193,39,45,.28);
}
.btn-primary:hover{
  text-decoration:none;
  transform:translateY(-2px);
  box-shadow:0 16px 32px rgba(193,39,45,.36);
}
.btn-ghost{
  border:1px solid var(--brand);
  color:var(--brand);
  background:rgba(255,255,255,.6);
  -webkit-backdrop-filter:blur(6px);
  backdrop-filter:blur(6px);
}
.btn-ghost:hover{
  background:rgba(193,39,45,.08);
  text-decoration:none;
  transform:translateY(-2px);
}

.hero-stats{
  display:flex;
  gap:30px;
  margin-top:28px;
  flex-wrap:wrap;
}
.hero-stats .stat b{
  display:block;
  font-size:27px;
  line-height:1.2;
  color:var(--brand);
  font-variant-numeric:tabular-nums;
}
.hero-stats .stat span{
  font-size:13px;
  color:var(--muted);
}

/* ===== Carousel ===== */
.carousel{
  position:relative;
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid var(--glass-line);
  background:var(--glass);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  backdrop-filter:blur(16px) saturate(150%);
  min-height:290px;
  box-shadow:var(--shadow-lg);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease);
}
.carousel:hover{transform:translateY(-4px);box-shadow:0 26px 60px rgba(193,39,45,.22)}
.slide{display:none;padding:30px}
.slide.active{display:block;animation:fadeSlide .5s var(--ease)}
@keyframes fadeSlide{
  from{opacity:0;transform:translateY(10px)}
  to{opacity:1;transform:none}
}
.slide h3{margin:0 0 10px;font-size:20px;line-height:1.4}
.slide p{margin:0;color:var(--muted);font-size:14.5px}
.slide .tag{
  display:inline-block;
  font-size:12px;
  font-weight:600;
  background:rgba(193,39,45,.1);
  color:var(--brand);
  border-radius:var(--radius-pill);
  padding:3px 12px;
  margin-bottom:12px;
}
.carousel-dots{
  position:absolute;
  bottom:14px;
  right:18px;
  display:flex;
  gap:7px;
}
.carousel-dots button{
  width:9px;
  height:9px;
  border-radius:50%;
  border:0;
  background:rgba(0,0,0,.18);
  cursor:pointer;
  padding:0;
  transition:background-color .25s var(--ease),transform .25s var(--ease);
}
.carousel-dots button:hover{transform:scale(1.25)}
.carousel-dots button.active{background:var(--brand)}

/* ===== Anchor nav ===== */
.anchor-nav{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:20px;
  margin-bottom:4px;
}
.anchor-nav a{
  font-size:13.5px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  padding:5px 15px;
  background:var(--card);
  color:var(--ink);
  transition:border-color .22s var(--ease),color .22s var(--ease),background-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.anchor-nav a:hover{
  border-color:var(--brand);
  color:var(--brand);
  background:rgba(193,39,45,.06);
  text-decoration:none;
  transform:translateY(-2px);
  box-shadow:var(--shadow-sm);
}

/* ===== Sections ===== */
section.block{
  padding:56px 0;
  border-bottom:1px solid var(--line);
  scroll-margin-top:80px;
  transition:background-color .3s var(--ease);
}
section.block:nth-child(even){background:var(--grad-soft)}

.section-head{max-width:840px;margin-bottom:28px}
.section-head h2{
  font-size:28px;
  line-height:1.35;
  margin:0 0 10px;
  font-weight:800;
}
.section-head p{color:var(--muted);margin:0;font-size:15px}

/* ===== Grids ===== */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}

/* ===== Cards ===== */
.card{
  position:relative;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px;
  box-shadow:var(--shadow-sm);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.card::before{
  content:"";
  position:absolute;
  inset:0;
  border-radius:inherit;
  background:linear-gradient(135deg,rgba(193,39,45,.06),rgba(255,122,89,0) 55%);
  opacity:0;
  transition:opacity .3s var(--ease);
  pointer-events:none;
}
.card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-md);
  border-color:rgba(193,39,45,.28);
}
.card:hover::before{opacity:1}
.card h3{margin:0 0 10px;font-size:18px;line-height:1.45}
.card h4{margin:16px 0 6px;font-size:15px;color:var(--brand)}
.card p{margin:0 0 8px;color:var(--muted);font-size:14.5px}
.card p:last-child{margin-bottom:0}
.card ul{margin:6px 0 0;padding-left:20px;color:var(--muted);font-size:14.5px}
.card ul li{margin-bottom:4px}
.card ul li::marker{color:var(--brand)}
.card small{color:var(--muted);font-size:12.5px}
.card strong{color:var(--ink)}

/* ===== Article cards ===== */
.article-list{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.article-card{
  position:relative;
  display:flex;
  flex-direction:column;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:22px;
  box-shadow:var(--shadow-sm);
  overflow:hidden;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.article-card::after{
  content:"";
  position:absolute;
  left:0;
  top:0;
  height:3px;
  width:100%;
  background:var(--grad-brand);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .35s var(--ease);
}
.article-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-md);
  border-color:rgba(193,39,45,.28);
}
.article-card:hover::after{transform:scaleX(1)}
.article-card .meta{
  font-size:12.5px;
  color:var(--muted);
  margin-bottom:8px;
  letter-spacing:.3px;
}
.article-card h3{font-size:17px;line-height:1.5;margin:0 0 8px}
.article-card h3 a{color:var(--ink)}
.article-card h3 a:hover{color:var(--brand);text-decoration:none}
.article-card p{font-size:14px;color:var(--muted);margin:0 0 14px;flex:1}
.article-card .more{
  font-size:14px;
  font-weight:600;
  align-self:flex-start;
  transition:transform .25s var(--ease);
}
.article-card:hover .more{transform:translateX(4px)}

/* ===== FAQ ===== */
.faq-item{
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--card);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.faq-item:hover{border-color:rgba(193,39,45,.3);box-shadow:var(--shadow-sm)}
.faq-item.open{border-color:rgba(193,39,45,.4);box-shadow:var(--shadow-md)}
.faq-q{
  width:100%;
  text-align:left;
  background:transparent;
  border:0;
  padding:16px 18px;
  font-size:15.5px;
  font-weight:600;
  font-family:inherit;
  cursor:pointer;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  color:var(--ink);
  transition:color .22s var(--ease);
}
.faq-q:hover{color:var(--brand)}
.faq-q .plus{
  color:var(--brand);
  font-size:20px;
  line-height:1;
  flex:none;
  transition:transform .3s var(--ease);
}
.faq-item.open .plus{transform:rotate(45deg)}
.faq-a{
  display:none;
  padding:0 18px 16px;
  color:var(--muted);
  font-size:14.5px;
  animation:fadeSlide .35s var(--ease);
}
.faq-item.open .faq-a{display:block}

/* ===== Steps ===== */
.steps{counter-reset:step;list-style:none;padding:0;margin:0}
.steps li{
  position:relative;
  padding:0 0 24px 56px;
  border-left:2px solid var(--line);
  margin-left:18px;
  transition:border-color .3s var(--ease);
}
.steps li:hover{border-left-color:var(--brand)}
.steps li:last-child{border-left-color:transparent;padding-bottom:0}
.steps li::before{
  counter-increment:step;
  content:counter(step);
  position:absolute;
  left:-19px;
  top:0;
  width:36px;
  height:36px;
  border-radius:50%;
  background:var(--grad-brand);
  color:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:700;
  font-size:15px;
  box-shadow:0 6px 16px rgba(193,39,45,.28);
  transition:transform .3s var(--ease);
}
.steps li:hover::before{transform:scale(1.1)}
.steps h4{margin:4px 0 6px;font-size:16px}
.steps p{margin:0;color:var(--muted);font-size:14.5px}

/* ===== Reveal animation ===== */
.reveal{
  opacity:0;
  transform:translateY(20px);
  transition:opacity .7s var(--ease),transform .7s var(--ease);
  will-change:opacity,transform;
}
.reveal.visible{opacity:1;transform:none}

/* ===== Reviews ===== */
.review{
  position:relative;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:22px;
  box-shadow:var(--shadow-sm);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.review::before{
  content:"\201C";
  position:absolute;
  top:6px;
  right:18px;
  font-size:52px;
  line-height:1;
  color:rgba(193,39,45,.14);
  font-family:Georgia,serif;
}
.review:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(193,39,45,.28)}
.review .who{font-weight:600;margin-bottom:2px}
.review .role{font-size:13px;color:var(--muted);margin-bottom:10px}
.review p{font-size:14.5px;color:var(--muted);margin:0}

/* ===== Footer ===== */
footer.site-footer{
  background:linear-gradient(180deg,#1d1d1f 0%,#141416 100%);
  color:#c9c9cc;
  padding:48px 0 26px;
  font-size:14px;
}
footer.site-footer a{color:#e8e8ea;transition:color .22s var(--ease)}
footer.site-footer a:hover{color:#ff8a7a;text-decoration:none}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:28px;
}
footer h4{color:#fff;font-size:15px;margin:0 0 12px}
footer p{color:#a8a8ad;margin:0 0 10px}
footer ul{list-style:none;padding:0;margin:0}
footer ul li{margin-bottom:8px}
.footer-bottom{
  border-top:1px solid #333;
  margin-top:30px;
  padding-top:18px;
  display:flex;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
  font-size:13px;
  color:#9a9a9e;
}

/* ===== Back to top ===== */
.back-top{
  position:fixed;
  right:22px;
  bottom:22px;
  width:46px;
  height:46px;
  border-radius:50%;
  background:var(--grad-brand);
  color:#fff;
  border:0;
  cursor:pointer;
  font-size:18px;
  display:none;
  z-index:120;
  box-shadow:0 10px 24px rgba(193,39,45,.38);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease);
}
.back-top.show{display:block;animation:fadeSlide .3s var(--ease)}
.back-top:hover{transform:translateY(-3px) scale(1.05);box-shadow:0 16px 32px rgba(193,39,45,.46)}

/* ===== Dark mode ===== */
body.dark{
  --ink:#e8e8ea;
  --muted:#a8a8ad;
  --line:#2e2e33;
  --bg:#141416;
  --soft:#1b1b1e;
  --card:#1b1b1e;
  --glass:rgba(20,20,22,.72);
  --glass-line:rgba(255,255,255,.08);
  --grad-hero:linear-gradient(135deg,#2a1417 0%,#1f1417 40%,#1b1b1e 72%,#141416 100%);
  --grad-soft:linear-gradient(180deg,#141416 0%,#1b1b1e 100%);
  --shadow-sm:0 2px 8px rgba(0,0,0,.4);
  --shadow-md:0 10px 30px rgba(0,0,0,.5);
  --shadow-lg:0 18px 50px rgba(0,0,0,.55);
}
body.dark header.site-header{background:var(--glass)}
body.dark .card,
body.dark .article-card,
body.dark .faq-item,
body.dark .review,
body.dark .carousel,
body.dark .search-box,
body.dark .icon-btn,
body.dark .anchor-nav a{
  background:var(--card);
  color:var(--ink);
}
body.dark .faq-q{background:transparent;color:var(--ink)}
body.dark .btn-ghost{background:rgba(255,255,255,.04)}
body.dark .carousel-dots button{background:rgba(255,255,255,.22)}
body.dark .carousel-dots button.active{background:var(--brand)}
body.dark .card::before{background:linear-gradient(135deg,rgba(224,67,74,.12),rgba(255,122,89,0) 55%)}
body.dark .review::before{color:rgba(224,67,74,.2)}
body.dark .search-box input{color:var(--ink)}
body.dark footer.site-footer{background:linear-gradient(180deg,#101012 0%,#0b0b0d 100%)}

/* ===== Responsive ===== */
@media (max-width:1024px){
  .hero h1{font-size:31px}
  .grid-3{grid-template-columns:repeat(2,1fr)}
}

@media (max-width:960px){
  .hero-grid,
  .grid-3,
  .grid-2,
  .article-list,
  .footer-grid{grid-template-columns:1fr}

  nav.main-nav{display:none}
  nav.main-nav.open{
    display:block;
    position:absolute;
    top:100%;
    left:0;
    right:0;
    background:var(--card);
    border-bottom:1px solid var(--line);
    padding:14px 20px;
    box-shadow:var(--shadow-md);
    animation:fadeSlide .3s var(--ease);
  }
  nav.main-nav.open ul{flex-direction:column;gap:4px}
  nav.main-nav.open a{display:block;padding:9px 10px;border-radius:var(--radius-sm)}

  .menu-toggle{display:inline-block}
  .search-box input{width:110px}

  .hero{padding:40px 0 34px}
  .hero-stats{gap:22px}
  section.block{padding:44px 0}
}

@media (max-width:640px){
  body{font-size:15.5px}
  .wrap{padding:0 16px}
  .breadcrumb{padding:12px 16px}
  .hero h1{font-size:26px}
  .hero p.lead{font-size:15.5px}
  .hero-stats{gap:16px}
  .hero-stats .stat b{font-size:23px}
  .section-head h2{font-size:23px}
  .card,.article-card,.review{padding:18px}
  .slide{padding:24px}
  .search-box{display:none}
  .header-tools{gap:8px}
  .btn{padding:10px 18px;font-size:14.5px}
  .back-top{right:14px;bottom:14px;width:42px;height:42px}
}

@media (max-width:400px){
  .brand{font-size:17px}
  .brand .logo-mark{width:32px;height:32px}
  .hero h1{font-size:23px}
}

/* ===== Motion & print ===== */
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}

@media print{
  header.site-header,.back-top,.carousel-dots,.hero-actions,.anchor-nav{display:none !important}
  body{background:#fff;color:#000}
  section.block{padding:16px 0;break-inside:avoid}
  .card,.article-card,.faq-item,.review{box-shadow:none;border-color:#ccc}
  a{color:#000;text-decoration:underline}
}