*{box-sizing:border-box;margin:0;padding:0}

:root{
  --bg:#080b17;
  --bg2:#0d1230;
  --card:rgba(255,255,255,.04);
  --card-border:rgba(255,255,255,.07);
  --card-hover:rgba(255,255,255,.08);
  --ink:#e2e8f0;
  --muted:#848bb0;
  --accent:#f59e0b;
  --accent2:#818cf8;
  --accent-dim:rgba(245,158,11,.12);
  --good:#34d399;
  --warn:#fbbf24;
  --bad:#f87171;
  --radius:18px;
  --radius-sm:12px;
}

body{
  font-family:'Plus Jakarta Sans',-apple-system,BlinkMacSystemFont,sans-serif;
  background:var(--bg);
  color:var(--ink);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

/* ambient bg glow */
body::before{
  content:'';position:fixed;top:-30%;right:-20%;width:800px;height:800px;
  background:radial-gradient(circle,rgba(129,140,248,.08),transparent 70%);
  pointer-events:none;z-index:0;
}
body::after{
  content:'';position:fixed;bottom:-20%;left:-10%;width:600px;height:600px;
  background:radial-gradient(circle,rgba(245,158,11,.05),transparent 70%);
  pointer-events:none;z-index:0;
}

.wrap{max-width:1120px;margin:0 auto;padding:0 24px;position:relative;z-index:1}

/* ── top bar v2 ── */
.topbar{
  position:sticky;top:0;z-index:100;
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 24px;
  background:rgba(8,11,23,.65);
  backdrop-filter:blur(16px) saturate(180%);
  -webkit-backdrop-filter:blur(16px) saturate(180%);
  border-bottom:1px solid rgba(255,255,255,.04);
  transition:box-shadow .3s ease;
}
.topbar.scrolled{
  box-shadow:0 4px 30px rgba(0,0,0,.3);
}

.brand{
  display:flex;flex-direction:column;gap:2px;
}
.brand-row{
  display:flex;align-items:center;gap:10px;
}
.brand-logo{
  position:relative;width:32px;height:32px;
}
.brand-logo svg{
  width:32px;height:32px;color:var(--accent);
  filter:drop-shadow(0 0 8px rgba(245,158,11,.4));
}
.brand-name{
  font-family:'DM Serif Display',serif;
  font-size:20px;color:#fff;letter-spacing:.3px;
}
.brand-tagline{
  font-size:10px;color:var(--muted);letter-spacing:.5px;
  padding-left:42px;margin-top:-2px;
}

.topnav{display:flex;align-items:center;gap:4px}
.topnav a{
  color:var(--muted);text-decoration:none;font-size:13px;font-weight:600;
  padding:8px 14px;border-radius:10px;transition:all .2s ease;
  position:relative;
}
.topnav a::after{
  content:'';position:absolute;bottom:4px;left:50%;
  width:0;height:2px;background:var(--accent);
  transition:all .25s ease;transform:translateX(-50%);
  border-radius:2px;
}
.topnav a:hover{color:#fff}
.topnav a:hover::after{width:20px}
.topnav a.active{color:var(--accent)}
.topnav a.active::after{width:20px}

.topnav .btn-link{
  background:linear-gradient(135deg,rgba(245,158,11,.15),rgba(245,158,11,.08));
  color:var(--accent);padding:10px 20px;border-radius:10px;
  border:1px solid rgba(245,158,11,.2);
  box-shadow:0 0 20px rgba(245,158,11,.1);
  margin-left:8px;
}
.topnav .btn-link::after{display:none}
.topnav .btn-link:hover{
  background:linear-gradient(135deg,rgba(245,158,11,.25),rgba(245,158,11,.12));
  box-shadow:0 0 30px rgba(245,158,11,.2);
  transform:translateY(-1px);
}

/* hamburger */
.hamburger{
  display:none;flex-direction:column;gap:5px;
  width:28px;height:28px;cursor:pointer;
  background:none;border:none;padding:0;
}
.hamburger span{
  display:block;width:100%;height:2px;background:#fff;
  border-radius:2px;transition:all .3s ease;
}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* mobile menu */
.mobile-menu{
  display:none;position:fixed;top:65px;left:0;right:0;
  background:rgba(8,11,23,.95);backdrop-filter:blur(20px);
  border-bottom:1px solid rgba(255,255,255,.05);
  padding:20px 24px;z-index:99;
  animation:slideDown .25s ease;
}
.mobile-menu.open{display:block}
@keyframes slideDown{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:none}}
.mobile-menu a{
  display:block;color:var(--muted);text-decoration:none;
  font-size:15px;font-weight:600;padding:14px 0;
  border-bottom:1px solid rgba(255,255,255,.04);
}
.mobile-menu a:last-child{border:none}
.mobile-menu a:hover{color:#fff}
.mobile-menu .btn-link{
  display:inline-block;margin-top:16px;
  background:linear-gradient(135deg,rgba(245,158,11,.15),rgba(245,158,11,.08));
  color:var(--accent);padding:12px 24px;border-radius:10px;
  border:1px solid rgba(245,158,11,.2);text-align:center;
}

/* ── hero ── */
.hero{
  display:grid;grid-template-columns:1fr 380px;gap:50px;
  padding:60px 0 50px;align-items:center;
}
.hero-left{}

.hero .badge{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--accent-dim);border:1px solid rgba(245,158,11,.15);
  border-radius:999px;padding:5px 14px 5px 10px;
  font-size:12px;font-weight:600;color:var(--accent);margin-bottom:20px;
}
.hero .badge .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);animation:pulse-dot 2s infinite}
@keyframes pulse-dot{0%,100%{opacity:1}50%{opacity:.3}}

.hero h1{
  font-family:'DM Serif Display',serif;
  font-size:48px;line-height:1.15;color:#fff;font-weight:400;
  margin-bottom:14px;
}
.hero h1 em{font-style:italic;color:var(--accent)}
.hero p{
  color:var(--muted);font-size:16px;margin-bottom:28px;max-width:480px;
}

.calc-card{
  background:var(--card);border:1px solid var(--card-border);
  border-radius:var(--radius);padding:24px;
  backdrop-filter:blur(12px);
}
.calc-card .row{display:grid;grid-template-columns:1fr 1fr auto;gap:12px;align-items:end}
.calc-card .field{}
.calc-card label{display:block;font-size:12px;color:var(--muted);margin-bottom:6px;font-weight:600;text-transform:uppercase;letter-spacing:.5px}
.calc-card input{
  width:100%;padding:12px 14px;border-radius:var(--radius-sm);
  border:1px solid var(--card-border);background:rgba(255,255,255,.04);
  color:#fff;font-size:16px;font-family:inherit;
  font-variant-numeric:tabular-nums;transition:.15s;
}
.calc-card input:focus{outline:none;border-color:rgba(245,158,11,.4);background:rgba(255,255,255,.07)}
.calc-card input::-webkit-calendar-picker-indicator{filter:invert(.7);opacity:.6}

.btn-primary{
  padding:12px 24px;border:none;border-radius:var(--radius-sm);
  background:linear-gradient(135deg,#f59e0b,#d97706);
  color:#0a0e1a;font-size:15px;font-weight:700;cursor:pointer;
  white-space:nowrap;transition:.2s;font-family:inherit;
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 8px 25px rgba(245,158,11,.25)}

.btn-secondary{
  padding:12px 22px;border:1px solid var(--card-border);border-radius:var(--radius-sm);
  background:transparent;color:var(--muted);font-size:14px;font-weight:600;
  cursor:pointer;transition:.15s;font-family:inherit;
}
.btn-secondary:hover{border-color:rgba(255,255,255,.15);color:#fff}

.calc-card .hint{font-size:12px;color:#686e96;margin-top:10px}

/* ── hero right (illustration) ── */
.hero-right{position:relative;display:flex;align-items:center;justify-content:center}
.moon-scene{position:relative;width:300px;height:300px}
.moon{
  width:140px;height:140px;border-radius:50%;
  background:linear-gradient(135deg,#fef3c7,#f59e0b);
  position:absolute;top:50px;right:40px;
  box-shadow:0 0 80px rgba(245,158,11,.3),0 0 200px rgba(245,158,11,.1);
  animation:float 6s ease-in-out infinite;
}
.moon::after{
  content:'';position:absolute;inset:-20px;border-radius:50%;
  background:radial-gradient(circle,rgba(245,158,11,.15),transparent 60%);
  animation:pulse-glow 4s ease-in-out infinite;
}
@keyframes pulse-glow{0%,100%{opacity:.6;transform:scale(1)}50%{opacity:1;transform:scale(1.08)}}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}
.crater{
  position:absolute;border-radius:50%;background:rgba(217,119,6,.15);
}
.crater:nth-child(1){width:18px;height:18px;top:30px;left:28px}
.crater:nth-child(2){width:10px;height:10px;top:60px;left:60px}
.crater:nth-child(3){width:25px;height:25px;top:80px;left:30px}
.crater:nth-child(4){width:8px;height:8px;top:45px;left:80px}

.orbit{
  position:absolute;top:50%;left:50%;width:260px;height:260px;
  border:1px solid rgba(245,158,11,.1);border-radius:50%;
  transform:translate(-50%,-50%) rotateX(75deg);
}
.orbit::before{
  content:'';position:absolute;top:-4px;left:50%;width:8px;height:8px;
  border-radius:50%;background:rgba(255,255,255,.7);
  transform:translateX(-50%);
  animation:orbit-move 12s linear infinite;
}
@keyframes orbit-move{from{transform:translateX(-50%) rotate(0deg) translateX(130px) rotate(0deg)}to{transform:translateX(-50%) rotate(360deg) translateX(130px) rotate(-360deg)}}

.star{
  position:absolute;width:3px;height:3px;border-radius:50%;
  background:#fff;animation:twinkle var(--d,3s) ease-in-out infinite;
}
@keyframes twinkle{0%,100%{opacity:.2}50%{opacity:.8}}
.star:nth-child(1){top:0;left:80px;--d:2.5s}
.star:nth-child(2){top:40px;left:0;width:2px;height:2px;--d:4s}
.star:nth-child(3){top:10px;right:0;--d:3.2s}
.star:nth-child(4){bottom:60px;left:60px;width:2px;height:2px;--d:3.8s}
.star:nth-child(5){bottom:30px;right:30px;--d:2.2s}
.star:nth-child(6){top:140px;left:20px;--d:4.5s}
.star:nth-child(7){top:80px;right:20px;width:2px;height:2px;--d:3s}
.star:nth-child(8){bottom:0;left:130px;--d:2.8s}

/* ── result panel ── */
.result-panel{display:none;margin-top:18px;animation:fadeUp .3s ease}
.result-panel.show{display:block}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.result-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:14px}
.result-stat{
  background:rgba(255,255,255,.04);border:1px solid var(--card-border);
  border-radius:var(--radius-sm);padding:16px;
}
.result-stat .num{font-size:28px;font-weight:700;color:#fff;font-variant-numeric:tabular-nums}
.result-stat .lbl{font-size:12px;color:var(--muted);margin-top:3px}

.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;font-size:13px;font-weight:700}
.badge-good{background:rgba(52,211,153,.15);color:var(--good);border:1px solid rgba(52,211,153,.2)}
.badge-warn{background:rgba(251,191,36,.15);color:var(--warn);border:1px solid rgba(251,191,36,.2)}
.badge-bad{background:rgba(248,113,113,.15);color:var(--bad);border:1px solid rgba(248,113,113,.2)}

.bar-track{height:6px;border-radius:999px;background:rgba(255,255,255,.06);margin:12px 0 6px;overflow:hidden}
.bar-fill{height:100%;border-radius:999px;transition:width .5s ease}
.bar-fill.good{background:linear-gradient(90deg,var(--good),#6ee7b7)}
.bar-fill.warn{background:linear-gradient(90deg,var(--warn),#fde68a)}
.bar-fill.bad{background:linear-gradient(90deg,var(--bad),#fca5a5)}

.bar-labels{display:flex;justify-content:space-between;font-size:11px;color:var(--muted)}

.analysis-card{
  background:rgba(255,255,255,.03);border:1px solid var(--card-border);
  border-radius:var(--radius-sm);padding:16px;
}
.analysis-card h4{font-size:12px;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.5px;margin-bottom:8px}
.analysis-card table{width:100%;border-collapse:collapse;font-size:14px}
.analysis-card td{padding:8px 0;border-bottom:1px solid rgba(255,255,255,.04)}
.analysis-card td:last-child{text-align:right;color:#fff;font-weight:600}
.analysis-card tr:last-child td{border:none}
.analysis-card .tip{font-size:12.5px;color:var(--muted);margin-top:10px;padding-top:10px;border-top:1px solid rgba(255,255,255,.06)}

/* ── trust strip ── */
.trust-strip{
  display:flex;align-items:center;gap:40px;justify-content:center;
  padding:28px 0;border-top:1px solid rgba(255,255,255,.04);
  border-bottom:1px solid rgba(255,255,255,.04);
  margin-bottom:60px;
}
.trust-item{text-align:center}
.trust-item .num{font-size:24px;font-weight:800;color:#fff}
.trust-item .lbl{font-size:12px;color:var(--muted);margin-top:2px}
.trust-divider{width:1px;height:30px;background:rgba(255,255,255,.08)}

/* ── how it works ── */
.how{text-align:center;margin-bottom:50px}
.how .label{font-size:12px;color:var(--accent);font-weight:700;text-transform:uppercase;letter-spacing:1.5px;margin-bottom:6px}
.how h2{font-family:'DM Serif Display',serif;font-size:32px;color:#fff;font-weight:400;margin-bottom:8px}
.how .sub{color:var(--muted);font-size:14px;margin-bottom:30px}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;text-align:left}
.step{
  background:var(--card);border:1px solid var(--card-border);
  border-radius:var(--radius);padding:24px;position:relative;
}
.step .n{
  display:flex;align-items:center;justify-content:center;
  width:36px;height:36px;border-radius:50%;
  background:var(--accent-dim);color:var(--accent);
  font-weight:800;font-size:15px;margin-bottom:14px;
}
.step h4{font-size:16px;color:#fff;margin-bottom:5px}
.step p{font-size:13px;color:var(--muted);line-height:1.5}
.step-arrow{position:absolute;right:-14px;top:32px;color:rgba(255,255,255,.08);font-size:20px}

/* ── tools section ── */
.tools-header{
  display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:24px;
}
.tools-header h2{font-family:'DM Serif Display',serif;font-size:32px;color:#fff;font-weight:400}
.tools-header p{color:var(--muted);font-size:14px;margin-top:4px}

.tool-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:60px;
}
.tool{
  background:var(--card);border:1px solid var(--card-border);
  border-radius:var(--radius);padding:22px;cursor:pointer;
  transition:.2s;position:relative;overflow:hidden;
  min-height:160px;display:flex;flex-direction:column;
}
.tool:hover{
  background:var(--card-hover);border-color:rgba(255,255,255,.12);
  transform:translateY(-3px);
}
.tool.featured{grid-column:span 2;grid-row:span 1}
.tool .ico{font-size:28px;margin-bottom:10px;display:block}
.tool h4{font-size:15px;color:#fff;margin-bottom:4px;font-weight:600}
.tool p{font-size:12.5px;color:var(--muted);line-height:1.5;flex:1}
.tool .tag{
  display:inline-block;font-size:10px;font-weight:700;text-transform:uppercase;
  letter-spacing:.5px;padding:2px 8px;border-radius:6px;margin-top:10px;
}
.tag-top{background:var(--accent-dim);color:var(--accent)}

/* ── footer ── */
.footer{
  border-top:1px solid rgba(255,255,255,.05);
  max-width:1120px;margin:0 auto;padding:40px 24px 60px;
  display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;
}
.footer-brand{}
.footer-brand svg{width:24px;height:24px;color:var(--accent)}
.footer-brand .name{font-family:'DM Serif Display',serif;font-size:18px;color:#fff;margin:10px 0 6px}
.footer-brand .desc{font-size:13px;color:var(--muted);max-width:280px}
.footer-col h5{font-size:12px;color:var(--muted);font-weight:700;text-transform:uppercase;letter-spacing:1px;margin-bottom:14px}
.footer-col a{display:block;color:#848bb0;text-decoration:none;font-size:13px;padding:4px 0;transition:.15s}
.footer-col a:hover{color:#fff}

.footer-bot{
  border-top:1px solid rgba(255,255,255,.04);
  max-width:1120px;margin:0 auto;padding:20px 24px;
  display:flex;justify-content:space-between;
  font-size:12px;color:var(--muted);
}

/* ── blog / articles ── */
.blog-preview{margin-bottom:60px}
.blog-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:20px;flex-wrap:wrap;margin-bottom:24px;
}
.blog-head .label{
  font-size:12px;color:var(--accent);font-weight:700;
  text-transform:uppercase;letter-spacing:1.5px;margin-bottom:6px;
}
.blog-head h2{font-family:'DM Serif Display',serif;font-size:32px;color:#fff;font-weight:400}
.blog-head p{color:var(--muted);font-size:14px;margin-top:4px;max-width:480px}

.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.article-card{
  display:flex;flex-direction:column;
  background:var(--card);border:1px solid var(--card-border);
  border-radius:var(--radius);padding:22px 22px 18px;
  text-decoration:none;transition:.22s ease;position:relative;overflow:hidden;
}
.article-card::before{
  content:'';position:absolute;left:0;top:22px;bottom:22px;width:3px;
  background:var(--accent);border-radius:3px;opacity:0;transition:.22s ease;
}
.article-card:hover{
  background:var(--card-hover);border-color:rgba(255,255,255,.12);
  transform:translateY(-3px);
  box-shadow:0 12px 30px rgba(0,0,0,.25);
}
.article-card:hover::before{opacity:1}
.article-cat{
  display:inline-block;align-self:flex-start;
  font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.8px;
  color:var(--accent);background:var(--accent-dim);
  border:1px solid rgba(245,158,11,.18);
  padding:3px 10px;border-radius:999px;margin-bottom:12px;
}
.article-title{
  font-size:17px;color:#fff;font-weight:700;line-height:1.35;margin-bottom:8px;
  transition:color .2s ease;
}
.article-card:hover .article-title{color:var(--accent)}
.article-excerpt{font-size:13px;color:var(--muted);line-height:1.6;flex:1;margin-bottom:14px}
.article-foot{
  display:flex;align-items:center;justify-content:space-between;
  padding-top:12px;border-top:1px solid var(--card-border);
}
.article-date{font-size:11px;color:var(--muted);letter-spacing:.3px}
.article-read{font-size:13px;font-weight:700;color:var(--accent);transition:.2s}
.article-card:hover .article-read{text-decoration:underline}

/* ── modal ── */
.overlay{
  position:fixed;inset:0;background:rgba(8,11,23,.75);
  display:none;align-items:center;justify-content:center;padding:20px;z-index:100;
  backdrop-filter:blur(4px);
}
.overlay.open{display:flex}
.modal{
  background:#0d1230;border:1px solid rgba(255,255,255,.08);
  border-radius:var(--radius);max-width:460px;width:100%;
  padding:28px;max-height:90vh;overflow:auto;
  box-shadow:0 40px 100px rgba(0,0,0,.5);
}
.modal .close{float:right;font-size:24px;color:var(--muted);cursor:pointer;line-height:1}
.modal h3{font-family:'DM Serif Display',serif;font-size:21px;color:#fff;margin-bottom:4px}
.modal .desc{font-size:13px;color:var(--muted);margin-bottom:18px}
.modal .field{margin-bottom:14px}
.modal .field label{display:block;font-size:12px;color:var(--muted);margin-bottom:6px;font-weight:600}
.modal .field input,.modal .field select{
  width:100%;padding:12px 14px;border-radius:var(--radius-sm);
  border:1px solid var(--card-border);background:rgba(255,255,255,.05);
  color:#fff;font-size:15px;font-family:inherit;
}
.modal .field select option{background:#0d1230;color:#fff}
.modal .field input:focus{outline:none;border-color:rgba(245,158,11,.3)}
.calc-card select{
  width:100%;padding:12px 14px;border-radius:var(--radius-sm);
  border:1px solid var(--card-border);background:rgba(255,255,255,.04);
  color:#fff;font-size:16px;font-family:inherit;
  -webkit-appearance:none;appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%23848bb0' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center;
}
.calc-card select option{background:#0d1230;color:#fff}
.modal .btn-primary{width:100%;margin-top:4px}
.modal .out{display:none;margin-top:16px;background:rgba(255,255,255,.03);border-radius:12px;padding:4px}
.modal .out table{width:100%;border-collapse:collapse;font-size:14px}
.modal .out td{padding:8px 14px;border-bottom:1px solid rgba(255,255,255,.04);color:var(--muted)}
.modal .out td:last-child{text-align:right;color:#fff;font-weight:600}
.modal .out tr:last-child td{border:none}

/* ── responsive ── */
@media(max-width:900px){
  .hero{grid-template-columns:1fr;gap:30px;padding:30px 0}
  .hero h1{font-size:34px}
  .calc-card .row{grid-template-columns:1fr}
  .calc-card .btn-primary{width:100%;text-align:center}
  .steps{grid-template-columns:1fr}
  .step-arrow{display:none}
  .tool-grid{grid-template-columns:repeat(2,1fr)}
  .trust-strip{gap:20px;flex-wrap:wrap}
  .footer{grid-template-columns:1fr 1fr;gap:30px}
  .result-grid{grid-template-columns:1fr}
  .article-grid{grid-template-columns:repeat(2,1fr)}

  /* mobile nav */
  .topnav{display:none}
  .hamburger{display:flex}
  .brand-tagline{display:none}
}
@media(max-width:600px){
  .hero h1{font-size:28px}
  .tool-grid{grid-template-columns:1fr}
  .tool.featured{grid-column:span 1}
  .footer{grid-template-columns:1fr}
  .footer-bot{flex-direction:column;gap:8px;text-align:center}
  .article-grid{grid-template-columns:1fr}
}

/* =========================================================
   Article detail page + product cards + blog list
   ========================================================= */

/* reading progress bar */
.reading-progress{position:fixed;top:0;left:0;right:0;height:3px;background:transparent;z-index:201;pointer-events:none}
.reading-progress .rp-bar{height:100%;width:0;background:linear-gradient(90deg,var(--accent),var(--accent2));box-shadow:0 0 10px rgba(245,158,11,.5);transition:width .08s linear}

/* article page shell */
.article-page{max-width:980px;margin:0 auto;padding-top:28px}
.breadcrumb{font-size:12.5px;color:var(--muted);margin-bottom:22px;display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.breadcrumb a{color:var(--muted);text-decoration:none}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{opacity:.45}

.article-header{margin-bottom:32px}
.article-header h1{
  font-family:'DM Serif Display',serif;font-size:40px;line-height:1.18;color:#fff;font-weight:400;
  margin:14px 0;letter-spacing:.2px;
}
.article-sub{font-size:17px;color:var(--muted);line-height:1.6;max-width:680px}
.article-meta-row{display:flex;align-items:center;gap:10px;margin-top:18px;font-size:13px;color:var(--muted);flex-wrap:wrap}
.article-meta-row .author{color:var(--ink);font-weight:600}
.article-meta-row .dot{opacity:.4}

.article-layout{display:grid;grid-template-columns:1fr 220px;gap:48px;align-items:start}
.article-main{min-width:0}

/* body typography */
.article-content{font-size:16.5px;line-height:1.8;color:var(--ink)}
.article-content h2{
  font-family:'DM Serif Display',serif;font-size:26px;color:#fff;font-weight:400;
  margin:38px 0 14px;scroll-margin-top:90px;
}
.article-content h3{font-size:19px;color:#fff;font-weight:700;margin:26px 0 10px}
.article-content p{margin-bottom:16px;color:#cdd3ea}
.article-content ul,.article-content ol{margin:0 0 18px 22px}
.article-content li{margin-bottom:8px;color:#cdd3ea}
.article-content a{color:var(--accent);text-decoration:none;border-bottom:1px solid rgba(245,158,11,.3)}
.article-content a:hover{border-color:var(--accent)}
.article-content strong{color:#fff;font-weight:700}
.article-content blockquote.pull{
  border-left:3px solid var(--accent);
  background:var(--accent-dim);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  padding:16px 20px;margin:22px 0;
  font-size:17px;color:#fff;font-style:italic;line-height:1.6;
}
.article-content table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14.5px}
.article-content th,.article-content td{padding:10px 12px;border-bottom:1px solid var(--card-border);text-align:left}
.article-content th{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.5px;font-weight:700}
.article-content td{color:var(--ink)}
.article-content tr:last-child td{border-bottom:none}

/* TL;DR */
.tldr{
  background:linear-gradient(135deg,rgba(245,158,11,.08),rgba(129,140,248,.06));
  border:1px solid rgba(245,158,11,.2);
  border-radius:var(--radius);padding:22px 24px;margin-bottom:30px;
}
.tldr .tldr-title{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:1.2px;color:var(--accent);margin-bottom:12px}
.tldr ul{list-style:none;margin:0;padding:0}
.tldr li{position:relative;padding-left:26px;margin-bottom:10px;font-size:15px;color:var(--ink);line-height:1.55}
.tldr li::before{content:'✓';position:absolute;left:0;top:0;color:var(--accent);font-weight:800}

/* TOC sidebar */
.article-side{position:relative;align-self:stretch}
.toc{position:sticky;top:90px;font-size:13.5px}
.toc-title{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--muted);margin-bottom:12px}
.toc ul{list-style:none;margin:0;padding:0;border-left:1px solid var(--card-border)}
.toc li a{display:block;padding:7px 0 7px 14px;color:var(--muted);text-decoration:none;border-left:2px solid transparent;margin-left:-1px;transition:.15s;line-height:1.35}
.toc li a:hover,.toc li a.active{color:#fff;border-left-color:var(--accent)}

/* takeaways */
.takeaways{background:var(--card);border:1px solid var(--card-border);border-radius:var(--radius);padding:22px 24px;margin:30px 0}
.takeaways h4{font-size:13px;color:var(--accent);text-transform:uppercase;letter-spacing:1px;margin-bottom:12px}
.takeaways ul{list-style:none;margin:0;padding:0}
.takeaways li{position:relative;padding-left:24px;margin-bottom:9px;color:var(--ink);font-size:15px;line-height:1.5}
.takeaways li::before{content:'★';position:absolute;left:0;top:1px;color:var(--accent);font-size:11px}

/* tool promo */
.tool-promo{
  display:flex;align-items:center;gap:16px;
  background:var(--card);border:1px solid var(--card-border);border-radius:var(--radius);
  padding:18px 22px;margin:26px 0;text-decoration:none;transition:.2s;
}
.tool-promo:hover{border-color:rgba(245,158,11,.3);background:var(--card-hover);transform:translateY(-2px)}
.tool-promo .tp-ico{font-size:30px}
.tool-promo .tp-body{flex:1;min-width:0}
.tool-promo .tp-title{color:#fff;font-weight:700;font-size:15px}
.tool-promo .tp-desc{color:var(--muted);font-size:13px;margin-top:2px;line-height:1.45}
.tool-promo .tp-go{color:var(--accent);font-weight:700;font-size:14px;white-space:nowrap}

/* CTA block */
.cta-block{
  display:block;text-align:center;
  background:linear-gradient(135deg,rgba(245,158,11,.14),rgba(129,140,248,.08));
  border:1px solid rgba(245,158,11,.22);border-radius:var(--radius);
  padding:26px;margin:34px 0 10px;text-decoration:none;transition:.2s;
}
.cta-block:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(245,158,11,.12)}
.cta-block .cta-title{font-family:'DM Serif Display',serif;font-size:22px;color:#fff}
.cta-block .cta-sub{color:var(--muted);font-size:14px;margin-top:6px}

/* related + product headings */
.related{margin-top:40px}
.related > h3,.product-section > h3{font-family:'DM Serif Display',serif;font-size:24px;color:#fff;font-weight:400;margin-bottom:18px}

/* product cards */
.product-section{margin:36px 0}
.product-section .ftc{font-size:11.5px;color:var(--muted);margin-top:14px;line-height:1.5}
.product-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.product-card{
  display:flex;flex-direction:column;
  background:var(--card);border:1px solid var(--card-border);border-radius:var(--radius);
  overflow:hidden;transition:.22s ease;text-decoration:none;
}
.product-card:hover{border-color:rgba(255,255,255,.14);transform:translateY(-3px);box-shadow:0 12px 30px rgba(0,0,0,.25)}
.product-thumb{height:150px;display:flex;align-items:center;justify-content:center;font-size:46px;background:linear-gradient(135deg,rgba(245,158,11,.1),rgba(129,140,248,.08));border-bottom:1px solid var(--card-border)}
.product-thumb img{width:100%;height:100%;object-fit:cover}
.product-body{padding:16px 18px 18px;display:flex;flex-direction:column;flex:1}
.product-badge{display:inline-block;align-self:flex-start;font-size:9.5px;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:var(--accent);background:var(--accent-dim);border:1px solid rgba(245,158,11,.18);padding:2px 8px;border-radius:999px;margin-bottom:10px}
.product-name{font-size:15.5px;color:#fff;font-weight:700;line-height:1.35;margin-bottom:6px}
.product-blurb{font-size:13px;color:var(--muted);line-height:1.55;flex:1;margin-bottom:14px}
.product-foot{display:flex;align-items:center;justify-content:space-between;gap:10px}
.product-price{font-size:15px;font-weight:700;color:#fff;font-variant-numeric:tabular-nums}
.product-cta{font-size:12.5px;font-weight:700;color:var(--accent);border:1px solid rgba(245,158,11,.35);border-radius:999px;padding:6px 14px;white-space:nowrap;transition:.18s}
.product-card:hover .product-cta{background:var(--accent);color:#0a0e1a}

/* inline product (in body) */
.product-inline{
  display:flex;align-items:center;gap:16px;
  border:1px solid var(--card-border);border-left:3px solid var(--accent);
  border-radius:var(--radius-sm);padding:14px 18px;margin:24px 0;background:rgba(255,255,255,.03);
}
.product-inline .pi-thumb{width:64px;height:64px;border-radius:10px;flex:none;display:flex;align-items:center;justify-content:center;font-size:30px;background:linear-gradient(135deg,rgba(245,158,11,.12),rgba(129,140,248,.08))}
.product-inline .pi-thumb img{width:100%;height:100%;border-radius:10px;object-fit:cover}
.product-inline .pi-body{flex:1;min-width:0}
.product-inline .pi-label{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:var(--accent);margin-bottom:3px}
.product-inline .pi-name{font-size:14.5px;color:#fff;font-weight:700;line-height:1.3}
.product-inline .pi-blurb{font-size:12.5px;color:var(--muted);margin-top:2px;line-height:1.45}
.product-inline .pi-cta{font-size:12.5px;font-weight:700;color:var(--accent);text-decoration:none;white-space:nowrap;flex:none}
.product-inline .pi-cta:hover{text-decoration:underline}

/* blog list page */
.blog-list-page{padding-bottom:50px}
.blog-list-head{margin:8px 0 26px}
.blog-list-head .label{font-size:12px;color:var(--accent);font-weight:700;text-transform:uppercase;letter-spacing:1.5px;margin-bottom:6px}
.blog-list-head h1{font-family:'DM Serif Display',serif;font-size:38px;color:#fff;font-weight:400}
.blog-list-head p{color:var(--muted);font-size:15px;margin-top:6px}

/* category filter pills */
.blog-filters{
  display:flex;gap:8px;flex-wrap:wrap;margin-bottom:28px;
  padding-bottom:20px;border-bottom:1px solid var(--card-border);
}
.blog-filter{
  padding:7px 16px;border-radius:999px;border:1px solid var(--card-border);
  background:transparent;color:var(--muted);font-size:13px;font-weight:600;
  cursor:pointer;transition:.18s;font-family:inherit;
}
.blog-filter:hover{border-color:rgba(255,255,255,.18);color:#fff}
.blog-filter.active{
  background:var(--accent);color:#0a0e1a;border-color:var(--accent);
  box-shadow:0 2px 12px rgba(245,158,11,.25);
}

/* card top row (cat + read time) */
.ac-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.ac-top .article-cat{margin-bottom:0}
.ac-read{font-size:11px;color:var(--muted);letter-spacing:.3px}

/* featured card (first article, spans 2 cols) */
.article-card.featured{grid-column:span 2}
.article-card.featured .article-title{font-size:21px}
.article-card.featured .article-excerpt{font-size:14px}

/* empty state */
.blog-empty{
  text-align:center;padding:60px 20px;color:var(--muted);font-size:15px;
}

/* global FTC line */
.footer-ftc{font-size:11px;color:var(--muted);text-align:center;padding:0 0 30px;max-width:680px;margin:0 auto;line-height:1.5}

/* ── in-article interactive calculator (专题页核心) ── */
.sd-calc{
  background:linear-gradient(135deg,rgba(245,158,11,.07),rgba(129,140,248,.05));
  border:1px solid rgba(245,158,11,.18);
  border-radius:var(--radius);
  padding:26px 28px;margin:4px 0 38px;
}
.sd-calc-head h2{font-family:'DM Serif Display',serif;font-size:26px;color:#fff;font-weight:400;margin:10px 0 8px}
.sd-calc-head p{color:var(--muted);font-size:14.5px;line-height:1.6;max-width:640px}
.sd-calc-badge{display:inline-block;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--accent);background:var(--accent-dim);border:1px solid rgba(245,158,11,.2);padding:4px 10px;border-radius:999px}
.sd-calc-form{display:flex;gap:14px;align-items:flex-end;flex-wrap:wrap;margin:20px 0 18px}
.sd-field{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--muted);font-weight:600}
.sd-field input{
  background:rgba(255,255,255,.06);border:1px solid var(--card-border);
  border-radius:12px;padding:11px 14px;color:#fff;font-size:15px;font-family:inherit;color-scheme:dark;
}
.sd-field input:focus{outline:none;border-color:var(--accent)}
.sd-calc-btn{
  background:var(--accent);color:#0a0e1a;border:none;border-radius:12px;
  padding:12px 22px;font-size:14px;font-weight:700;cursor:pointer;font-family:inherit;
  transition:.18s;white-space:nowrap;
}
.sd-calc-btn:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(245,158,11,.25)}
.sd-result{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:16px;opacity:0;transform:translateY(6px);transition:.3s}
.sd-result.show{opacity:1;transform:none}
.sd-stat{background:rgba(255,255,255,.04);border:1px solid var(--card-border);border-radius:14px;padding:16px;text-align:center}
.sd-num{display:block;font-size:26px;font-weight:800;color:#fff;font-variant-numeric:tabular-nums}
.sd-rate.badge-good{color:var(--good)}
.sd-rate.badge-warn{color:var(--warn)}
.sd-rate.badge-bad{color:var(--bad)}
.sd-lbl{display:block;font-size:12px;color:var(--muted);margin-top:4px;text-transform:uppercase;letter-spacing:.5px}
.sd-bar{height:8px;background:rgba(255,255,255,.07);border-radius:999px;overflow:hidden}
.sd-bar-fill{height:100%;width:0;border-radius:999px;transition:width .35s ease}
.sd-bar-fill.good{background:var(--good)}
.sd-bar-fill.warn{background:var(--warn)}
.sd-bar-fill.bad{background:var(--bad)}
.sd-hint{font-size:12.5px;color:var(--muted);margin-top:14px}

/* ── FTC top disclosure ── */
.ftc-top{
  font-size:11.5px;color:var(--muted);line-height:1.5;
  margin-bottom:18px;padding:10px 14px;
  background:rgba(255,255,255,.02);border:1px solid var(--card-border);
  border-radius:var(--radius-sm);
}
.ftc-top a{color:var(--accent);text-decoration:none;border-bottom:1px solid rgba(245,158,11,.3)}
.ftc-top a:hover{border-color:var(--accent)}

/* ── Quick Verdict ── */
.quick-verdict{
  background:linear-gradient(135deg,rgba(52,211,153,.07),rgba(245,158,11,.06));
  border:1px solid rgba(52,211,153,.2);
  border-radius:var(--radius);padding:22px 26px;margin-bottom:28px;
  position:relative;overflow:hidden;
}
.quick-verdict::before{
  content:'';position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--good),var(--accent));
}
.qv-label{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:1.2px;color:var(--good);margin-bottom:10px}
.qv-text{font-size:15.5px;color:var(--ink);line-height:1.7;margin-bottom:14px}
.qv-text strong{color:#fff}
.qv-cta{
  display:inline-block;font-size:13px;font-weight:700;color:var(--accent);
  text-decoration:none;border:1px solid rgba(245,158,11,.35);
  padding:8px 18px;border-radius:999px;transition:.18s;
}
.qv-cta:hover{background:var(--accent);color:#0a0e1a;transform:translateY(-1px)}

/* ── mobile TOC ── */
.toc-mobile{
  display:none;margin-bottom:24px;
  background:var(--card);border:1px solid var(--card-border);
  border-radius:var(--radius-sm);overflow:hidden;
}
.toc-mobile summary{
  padding:14px 18px;font-size:13px;font-weight:700;color:var(--muted);
  cursor:pointer;list-style:none;display:flex;align-items:center;justify-content:space-between;
  text-transform:uppercase;letter-spacing:.8px;
}
.toc-mobile summary::-webkit-details-marker{display:none}
.toc-mobile summary::after{content:'▾';font-size:11px;transition:transform .2s}
.toc-mobile[open] summary::after{transform:rotate(180deg)}
.toc-mobile ul{list-style:none;margin:0;padding:0 18px 14px}
.toc-mobile li a{
  display:block;padding:8px 0;font-size:14px;color:var(--muted);
  text-decoration:none;border-bottom:1px solid rgba(255,255,255,.04);
  transition:.15s;
}
.toc-mobile li:last-child a{border-bottom:none}
.toc-mobile li a:hover{color:var(--accent)}

/* ── product section intro ── */
.ps-intro{font-size:14.5px;color:var(--muted);line-height:1.6;margin-bottom:20px;max-width:640px}
.product-section{scroll-margin-top:90px}
.product-section h2{
  font-family:'DM Serif Display',serif;font-size:26px;color:#fff;font-weight:400;
  margin:0 0 10px;
}

/* article / product responsive */
@media(max-width:900px){
  .article-layout{grid-template-columns:1fr}
  .article-side{display:none}
  .toc-mobile{display:block}
  .product-grid{grid-template-columns:1fr}
  .article-header h1{font-size:30px}
  .blog-list-head h1{font-size:30px}
}
@media(max-width:600px){
  .article-header h1{font-size:26px}
  .tool-promo{flex-direction:column;align-items:flex-start;gap:10px}
  .blog-list-head h1{font-size:26px}
  .article-card.featured{grid-column:span 1}
}