/* roulang page: index */
:root{
  --brand:#1d4ed8;
  --brand-deep:#0f2557;
  --brand-2:#2563eb;
  --brand-3:#0ea5b7;
  --accent:#f59e0b;
  --ink:#0f1d33;
  --ink-soft:#33465f;
  --muted:#657891;
  --line:#e3eaf5;
  --bg:#f5f8fd;
  --bg-alt:#edf3fb;
  --card:#ffffff;
  --radius-lg:26px;
  --radius:16px;
  --radius-sm:10px;
  --shadow-sm:0 6px 18px rgba(15,29,51,.06);
  --shadow:0 16px 38px rgba(15,29,51,.09);
  --shadow-lg:0 26px 60px rgba(15,29,51,.14);
  --space:76px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.78;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:3px solid rgba(14,165,183,.5);outline-offset:3px;border-radius:6px}
.site-container{width:100%;max-width:1180px;margin:0 auto;padding:0 22px}

/* ---------- topbar ---------- */
.topbar{
  background:var(--brand-deep);
  color:rgba(255,255,255,.82);
  font-size:13px;
  letter-spacing:.2px;
}
.topbar-inner{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:42px;flex-wrap:wrap;
}
.topbar-note{display:flex;align-items:center;gap:8px;min-width:0}
.topbar-dot{width:6px;height:6px;border-radius:50%;background:#39d0a6;flex:none;box-shadow:0 0 0 4px rgba(57,208,166,.18)}
.topbar-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.topbar-links a{color:rgba(255,255,255,.86);transition:color .2s ease}
.topbar-links a:hover{color:#fff}
.topbar-links a span{color:rgba(255,255,255,.5);margin-right:4px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.96);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  position:relative;
  display:flex;align-items:center;gap:26px;
  min-height:74px;
}
.brand{display:flex;align-items:center;gap:12px;flex:none}
.brand-mark{
  width:44px;height:44px;border-radius:14px;flex:none;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--brand-2),var(--brand-3));
  color:#fff;font-weight:700;font-size:19px;letter-spacing:1px;
  box-shadow:0 10px 22px rgba(37,99,235,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.brand-text strong{font-size:17px;font-weight:700;letter-spacing:.4px;white-space:nowrap}
.brand-text small{font-size:11.5px;color:var(--muted);letter-spacing:2.6px;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.main-nav a{
  position:relative;
  padding:9px 15px;border-radius:10px;
  font-size:15px;color:var(--ink-soft);font-weight:500;
  transition:background .2s ease,color .2s ease;
  white-space:nowrap;
}
.main-nav a:hover{background:#eef4ff;color:var(--brand)}
.main-nav a.active{color:var(--brand);font-weight:700}
.main-nav a.active::after{
  content:"";position:absolute;left:15px;right:15px;bottom:3px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand-2),var(--brand-3));
}
.nav-cta{
  flex:none;display:inline-flex;align-items:center;gap:7px;
  padding:11px 22px;border-radius:999px;
  background:linear-gradient(135deg,var(--brand-2),var(--brand-3));
  color:#fff;font-size:14.5px;font-weight:600;
  box-shadow:0 10px 24px rgba(37,99,235,.26);
  transition:transform .2s ease,box-shadow .2s ease;
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 16px 30px rgba(37,99,235,.34)}
.nav-toggle{
  display:none;margin-left:auto;
  width:44px;height:40px;border-radius:10px;border:1px solid var(--line);
  background:#fff;color:var(--ink-soft);cursor:pointer;
  align-items:center;justify-content:center;flex-direction:column;gap:4px;
  transition:background .2s ease,border-color .2s ease;
}
.nav-toggle:hover{background:#f1f6ff;border-color:#cad9f2}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink-soft);transition:transform .2s ease,opacity .2s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 28px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1.2;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn-primary{
  background:linear-gradient(135deg,var(--brand-2),var(--brand-3));
  color:#fff;box-shadow:0 14px 28px rgba(37,99,235,.28);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 20px 36px rgba(37,99,235,.34)}
.btn-primary:active{transform:translateY(0);box-shadow:0 10px 20px rgba(37,99,235,.24)}
.btn-ghost{
  background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.4);
}
.btn-ghost:hover{background:rgba(255,255,255,.24);border-color:rgba(255,255,255,.65)}
.btn-line{
  background:#fff;color:var(--brand);border-color:#c9dbf8;
}
.btn-line:hover{background:#f2f7ff;border-color:#a9c5f2;transform:translateY(-2px)}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(135deg,#0d2049 0%,#1b3f9e 52%,#0b8fa3 100%);
  color:#fff;
  padding:70px 0 78px;
}
.hero::before{
  content:"";position:absolute;width:640px;height:640px;border-radius:50%;
  right:-180px;top:-260px;
  background:radial-gradient(circle,rgba(80,190,255,.36),transparent 62%);
  pointer-events:none;
}
.hero::after{
  content:"";position:absolute;width:520px;height:520px;border-radius:50%;
  left:-220px;bottom:-300px;
  background:radial-gradient(circle,rgba(20,220,190,.24),transparent 64%);
  pointer-events:none;
}
.hero-inner{
  position:relative;z-index:2;
  display:grid;grid-template-columns:minmax(0,1.06fr) minmax(0,.94fr);
  gap:52px;align-items:center;
}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  padding:7px 16px;border-radius:999px;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.26);
  font-size:13px;letter-spacing:.6px;color:rgba(255,255,255,.94);
  margin-bottom:22px;
}
.hero-eyebrow b{font-weight:700;color:#7ef0cf}
.hero-title{
  font-size:40px;line-height:1.32;font-weight:800;letter-spacing:.2px;
  margin-bottom:20px;
}
.hero-title em{
  font-style:normal;
  background:linear-gradient(90deg,#9ed8ff,#7ef0cf);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-lead{
  font-size:15.5px;line-height:1.95;color:rgba(255,255,255,.86);
  max-width:600px;margin-bottom:30px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:32px}
.hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.hero-point{
  background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.18);
  border-radius:14px;padding:14px 16px;min-width:0;
}
.hero-point strong{display:block;font-size:14px;margin-bottom:4px;color:#d6ecff}
.hero-point span{font-size:12.5px;line-height:1.6;color:rgba(255,255,255,.72)}

/* hero panel */
.hero-panel{
  background:#fff;color:var(--ink);
  border-radius:var(--radius-lg);
  padding:28px 26px 26px;
  box-shadow:0 30px 70px rgba(6,20,45,.34);
  border:1px solid rgba(255,255,255,.6);
}
.panel-head{margin-bottom:20px}
.panel-head h2{font-size:19px;font-weight:700;letter-spacing:.2px;margin-bottom:6px}
.panel-head p{font-size:13px;line-height:1.7;color:var(--muted)}
.calc-form{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:14px}
.field{display:flex;flex-direction:column;gap:7px;min-width:0}
.field label{font-size:12.5px;font-weight:600;color:var(--ink-soft);letter-spacing:.3px}
.field input,.field select{
  width:100%;min-width:0;
  padding:11px 13px;border-radius:10px;
  border:1px solid #d6e2f4;background:#f8fbff;
  font-size:14.5px;color:var(--ink);
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.field input:focus,.field select:focus{
  outline:none;border-color:#7fa9ec;background:#fff;
  box-shadow:0 0 0 3px rgba(37,99,235,.14);
}
.calc-form .calc-submit{grid-column:1 / -1;margin-top:2px;width:100%}
.calc-result{
  margin-top:18px;padding:16px 16px 14px;
  border-radius:14px;background:linear-gradient(140deg,#f0f6ff,#eafaf7);
  border:1px dashed #bcd6f6;
}
.calc-result .result-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.calc-result .result-cell{min-width:0}
.calc-result .result-cell span{display:block;font-size:12px;color:var(--muted);letter-spacing:.2px}
.calc-result .result-cell strong{display:block;font-size:19px;font-weight:800;color:var(--brand);letter-spacing:.4px}
.calc-result .result-cell strong i{font-style:normal;font-size:12.5px;font-weight:600;color:var(--muted);margin-left:3px}
.calc-hint{font-size:12.5px;line-height:1.7;color:var(--muted);margin-top:10px}
.calc-tip{font-size:12px;line-height:1.65;color:#8896ab;margin-top:12px}

/* ---------- sections ---------- */
.section{padding:var(--space) 0}
.section-alt{background:var(--bg-alt)}
.section-head{max-width:760px;margin-bottom:40px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:2.4px;
  color:var(--brand-3);text-transform:uppercase;margin-bottom:12px;
}
.section-title{font-size:29px;line-height:1.42;font-weight:800;letter-spacing:.2px}
.section-desc{font-size:15px;line-height:1.9;color:var(--muted);margin-top:14px}

/* ---------- download ---------- */
.download-section{
  position:relative;
  background:linear-gradient(120deg,#101f3f,#1a3a7a 58%,#0d6f8c);
  color:#fff;padding:60px 0;
  overflow:hidden;
}
.download-section::after{
  content:"";position:absolute;inset:auto -140px -220px auto;
  width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(70,200,255,.28),transparent 65%);
  pointer-events:none;
}
.download-inner{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:46px;align-items:center}
.download-copy .eyebrow{color:#7ef0cf}
.download-copy h2{font-size:27px;line-height:1.45;font-weight:800;margin-bottom:14px}
.download-copy p{font-size:14.5px;line-height:1.9;color:rgba(255,255,255,.82);max-width:440px}
.download-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.download-card{
  display:flex;flex-direction:column;align-items:flex-start;gap:10px;
  padding:22px 20px;border-radius:18px;min-width:0;
  background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.2);
  transition:transform .22s ease,background .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.download-card:hover{transform:translateY(-4px);background:rgba(255,255,255,.18);border-color:rgba(255,255,255,.4);box-shadow:0 18px 36px rgba(3,15,40,.32)}
.dl-icon{
  width:40px;height:40px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.18);font-size:16px;font-weight:700;color:#fff;
}
.download-card strong{font-size:15.5px;font-weight:700;letter-spacing:.3px}
.download-card small{font-size:12px;line-height:1.6;color:rgba(255,255,255,.7)}
.dl-btn{
  margin-top:4px;
  display:inline-flex;align-items:center;gap:6px;
  padding:9px 18px;border-radius:999px;
  background:#fff;color:#12418f;font-size:13.5px;font-weight:700;
  transition:background .2s ease,transform .2s ease,box-shadow .2s ease;
}
.dl-btn:hover{background:#e8f4ff;transform:translateY(-1px);box-shadow:0 8px 18px rgba(0,0,0,.18)}

/* ---------- feature cards ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.feature-card{
  position:relative;min-width:0;
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:26px 22px 24px;
  box-shadow:var(--shadow-sm);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.feature-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#cfe0f8}
.feature-card h3{font-size:17px;font-weight:700;margin:16px 0 10px;letter-spacing:.2px}
.feature-card p{font-size:13.8px;line-height:1.85;color:var(--muted)}
.badge-num{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:52px;height:32px;padding:0 12px;border-radius:999px;
  font-size:13px;font-weight:800;letter-spacing:.6px;
  background:linear-gradient(135deg,#e4efff,#e3fbf6);
  color:var(--brand);border:1px solid #cfe4fb;
}
.feature-tag{
  display:inline-block;margin-top:16px;font-size:12px;font-weight:600;
  color:var(--brand-3);letter-spacing:.6px;
}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;counter-reset:step}
.step{
  position:relative;min-width:0;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:30px 24px 26px;box-shadow:var(--shadow-sm);
  transition:transform .22s ease,box-shadow .22s ease;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.step-num{
  display:flex;align-items:center;justify-content:center;
  width:46px;height:46px;border-radius:14px;
  background:linear-gradient(135deg,var(--brand-2),var(--brand-3));
  color:#fff;font-size:18px;font-weight:800;
  box-shadow:0 10px 22px rgba(37,99,235,.26);
  margin-bottom:18px;
}
.step h3{font-size:17px;font-weight:700;margin-bottom:10px}
.step p{font-size:13.8px;line-height:1.88;color:var(--muted)}

/* ---------- split ---------- */
.split{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:34px;align-items:start}
.rule-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.rule-card{
  min-width:0;padding:22px 20px;border-radius:var(--radius);
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:border-color .2s ease,transform .2s ease;
}
.rule-card:hover{border-color:#c9dcf8;transform:translateY(-3px)}
.rule-card h3{font-size:15.5px;font-weight:700;margin-bottom:8px;color:var(--brand)}
.rule-card p{font-size:13.4px;line-height:1.82;color:var(--muted)}
.side-note{
  background:linear-gradient(150deg,#11224a,#1c3f8c);
  color:#fff;border-radius:var(--radius-lg);padding:30px 26px;
  box-shadow:var(--shadow);
}
.side-note h3{font-size:17px;font-weight:700;margin-bottom:14px}
.side-note p{font-size:13.8px;line-height:1.9;color:rgba(255,255,255,.82);margin-bottom:16px}
.side-note .note-quote{
  font-size:14.5px;font-weight:700;line-height:1.75;
  padding:14px 16px;border-radius:12px;
  background:rgba(255,255,255,.1);border-left:3px solid #7ef0cf;
}

/* ---------- cost list ---------- */
.cost-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.cost-item{
  display:flex;gap:14px;min-width:0;
  padding:20px;border-radius:var(--radius);
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm);
}
.cost-item .dot{
  flex:none;width:10px;height:10px;border-radius:50%;margin-top:9px;
  background:linear-gradient(135deg,var(--brand-2),var(--brand-3));
  box-shadow:0 0 0 5px rgba(37,99,235,.1);
}
.cost-item div{min-width:0}
.cost-item h3{font-size:15.5px;font-weight:700;margin-bottom:6px}
.cost-item p{font-size:13.4px;line-height:1.82;color:var(--muted)}

/* ---------- audience ---------- */
.audience-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.audience-card{
  min-width:0;padding:28px 24px;border-radius:var(--radius-lg);
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm);
}
.audience-card.is-no{background:#fdf6ec;border-color:#f5dfbc}
.audience-card h3{font-size:17px;font-weight:800;margin-bottom:16px;display:flex;align-items:center;gap:9px}
.audience-card h3 i{
  font-style:normal;display:inline-flex;align-items:center;justify-content:center;
  width:26px;height:26px;border-radius:8px;font-size:13px;font-weight:800;color:#fff;
  background:linear-gradient(135deg,var(--brand-2),var(--brand-3));
}
.audience-card.is-no h3 i{background:linear-gradient(135deg,#e08b1c,#c2680a)}
.audience-card li{
  position:relative;padding-left:20px;
  font-size:14px;line-height:1.85;color:var(--ink-soft);
  margin-bottom:12px;
}
.audience-card li:last-child{margin-bottom:0}
.audience-card li::before{
  content:"";position:absolute;left:0;top:11px;
  width:7px;height:7px;border-radius:50%;background:var(--brand-3);
}
.audience-card.is-no li::before{background:#d08b28}

/* ---------- myths ---------- */
.myth-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.myth-item{
  min-width:0;padding:24px 22px;border-radius:var(--radius);
  background:#fff;border:1px solid var(--line);
  box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease;
}
.myth-item:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.myth-item .myth-wrong{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:.5px;
  padding:3px 10px;border-radius:999px;background:#fdecec;color:#c93b3b;margin-bottom:10px;
}
.myth-item h3{font-size:15.5px;font-weight:700;margin-bottom:10px;line-height:1.6}
.myth-item p{font-size:13.6px;line-height:1.85;color:var(--muted)}
.myth-item p b{color:var(--ink-soft)}

/* ---------- metric strip ---------- */
.metric-strip{
  display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:2px;
  background:#dfe9f7;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid #d7e4f5;
}
.metric-item{
  min-width:0;background:#fff;padding:26px 18px;text-align:center;
}
.metric-item strong{
  display:block;font-size:15px;font-weight:800;color:var(--brand);letter-spacing:.3px;margin-bottom:6px;
}
.metric-item span{font-size:12.6px;line-height:1.6;color:var(--muted)}

/* ---------- guarantee ---------- */
.guarantee-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.guarantee-card{
  min-width:0;padding:24px 22px;border-radius:var(--radius);
  background:linear-gradient(160deg,#ffffff,#f4f9ff);
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
}
.guarantee-card h3{font-size:15.5px;font-weight:700;margin-bottom:8px;display:flex;align-items:center;gap:8px}
.guarantee-card h3::before{
  content:"";width:8px;height:8px;border-radius:50%;
  background:linear-gradient(135deg,var(--brand-2),var(--brand-3));flex:none;
}
.guarantee-card p{font-size:13.4px;line-height:1.85;color:var(--muted)}

/* ---------- channel wall ---------- */
.channel-wall{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.4fr);gap:24px;align-items:center}
.channel-card{
  display:flex;gap:18px;align-items:flex-start;min-width:0;
  padding:28px 26px;border-radius:var(--radius-lg);
  background:linear-gradient(135deg,#eef5ff,#e9fbf7);
  border:1px solid #d3e5fb;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.channel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#b6d3f6}
.channel-icon{
  flex:none;width:54px;height:54px;border-radius:18px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--brand-2),var(--brand-3));
  color:#fff;font-size:19px;font-weight:800;
  box-shadow:0 12px 24px rgba(37,99,235,.24);
}
.channel-card h3{font-size:17.5px;font-weight:800;margin-bottom:8px}
.channel-card p{font-size:13.6px;line-height:1.82;color:var(--muted)}
.channel-card .channel-link{
  display:inline-flex;align-items:center;gap:6px;margin-top:12px;
  font-size:13.5px;font-weight:700;color:var(--brand);
}
.channel-card:hover .channel-link{gap:10px}
.channel-link{transition:gap .2s ease}

/* ---------- news ---------- */
.news-layout{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);gap:32px;align-items:start}
.news-main{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.news-card{
  display:flex;flex-direction:column;min-width:0;
  padding:22px 20px;border-radius:var(--radius);
  background:#fff;border:1px solid var(--line);
  box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#c9dcf8}
.news-meta{display:flex;flex-wrap:wrap;gap:10px;font-size:12px;color:var(--muted);margin-bottom:10px}
.news-meta .tag{
  padding:2px 10px;border-radius:999px;background:#eaf3ff;color:var(--brand);font-weight:600;
}
.news-card h3{font-size:15.5px;line-height:1.62;font-weight:700;margin-bottom:9px}
.news-card p{font-size:13.3px;line-height:1.82;color:var(--muted)}
.news-side{display:flex;flex-direction:column;gap:18px}
.side-card{
  padding:26px 24px;border-radius:var(--radius-lg);
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm);
}
.side-card h3{font-size:16px;font-weight:800;margin-bottom:16px}
.side-card .side-list li{
  padding:13px 0;border-bottom:1px dashed #e3ebf6;
}
.side-card .side-list li:last-child{border-bottom:0;padding-bottom:0}
.side-card .side-list a{
  display:block;font-size:14px;line-height:1.7;color:var(--ink-soft);font-weight:600;
  transition:color .2s ease;
}
.side-card .side-list a:hover{color:var(--brand)}
.side-card .side-list span{display:block;font-size:12px;color:var(--muted);margin-top:4px}
.empty-note{
  padding:26px 22px;border-radius:var(--radius);background:#f3f7fd;
  border:1px dashed #cbdcf3;font-size:13.6px;color:var(--muted);line-height:1.8;
}

/* ---------- faq ---------- */
.faq-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.faq-item{
  min-width:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:0 22px;box-shadow:var(--shadow-sm);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item[open]{border-color:#c6dbf8;box-shadow:var(--shadow)}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:flex-start;gap:12px;
  padding:20px 0;font-size:15.2px;font-weight:700;line-height:1.6;
  transition:color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";margin-left:auto;flex:none;
  font-size:19px;font-weight:400;line-height:1;color:var(--brand-3);
  transition:transform .2s ease;
}
.faq-item[open] summary::after{content:"–";transform:rotate(180deg)}
.faq-item summary:hover{color:var(--brand)}
.faq-item .faq-body{padding:0 0 20px;font-size:13.8px;line-height:1.92;color:var(--muted)}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;overflow:hidden;
  background:linear-gradient(120deg,#0d2049,#1d4499 55%,#0c7c92);
  border-radius:var(--radius-lg);
  padding:52px 46px;color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;
  box-shadow:var(--shadow-lg);
}
.cta-band::after{
  content:"";position:absolute;right:-120px;top:-140px;
  width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(120,220,255,.3),transparent 62%);
  pointer-events:none;
}
.cta-band .cta-text{position:relative;z-index:2;max-width:620px}
.cta-band h2{font-size:26px;line-height:1.45;font-weight:800;margin-bottom:12px}
.cta-band p{font-size:14.5px;line-height:1.9;color:rgba(255,255,255,.82)}
.cta-band .cta-actions{position:relative;z-index:2;display:flex;gap:14px;flex-wrap:wrap}

/* ---------- disclaimer ---------- */
.disclaimer{
  margin-top:34px;
  padding:22px 24px;border-radius:var(--radius);
  background:#fff8ec;border:1px solid #f3e2c4;
}
.disclaimer h3{font-size:14.5px;font-weight:800;color:#a06412;margin-bottom:8px}
.disclaimer p{font-size:13.2px;line-height:1.88;color:#8a6b3c}

/* ---------- footer ---------- */
.site-footer{
  background:#0b1730;color:rgba(255,255,255,.72);
  padding:60px 0 26px;font-size:13.6px;
}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr) minmax(0,1fr);gap:40px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand .brand-mark{width:40px;height:40px;border-radius:12px;font-size:17px}
.footer-brand strong{color:#fff;font-size:16px;font-weight:700;letter-spacing:.4px}
.footer-brand small{display:block;font-size:11.5px;letter-spacing:2.4px;color:rgba(255,255,255,.5)}
.footer-desc{font-size:13.2px;line-height:1.9;color:rgba(255,255,255,.6);max-width:380px}
.footer-col h3{font-size:14.5px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.4px}
.footer-col li{margin-bottom:11px}
.footer-col a{color:rgba(255,255,255,.66);transition:color .2s ease}
.footer-col a:hover{color:#7ef0cf}
.friend-links{
  margin-top:44px;padding-top:28px;border-top:1px solid rgba(255,255,255,.1);
}
.friend-links h3{font-size:14.5px;font-weight:700;color:#fff;margin-bottom:16px}
.friend-links .link-wrap{display:flex;flex-wrap:wrap;gap:10px}
.friend-links a,.friend-links .link-wrap > a{
  display:inline-block;padding:6px 15px;border-radius:999px;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);
  font-size:12.8px;color:rgba(255,255,255,.7);
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.friend-links a:hover{background:rgba(126,240,207,.16);color:#7ef0cf;border-color:rgba(126,240,207,.4)}
.friend-links .link-wrap{color:rgba(255,255,255,.5);font-size:12.8px}
.footer-bottom{
  margin-top:34px;padding-top:20px;border-top:1px solid rgba(255,255,255,.09);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:rgba(255,255,255,.42);
}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .hero-title{font-size:34px}
  .hero-inner{gap:36px}
  .feature-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .metric-strip{grid-template-columns:repeat(3,minmax(0,1fr))}
  .metric-item{border-bottom:1px solid #eaf1fa}
  .guarantee-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .download-inner{grid-template-columns:minmax(0,1fr);gap:30px}
  .news-layout{grid-template-columns:minmax(0,1fr)}
  .split{grid-template-columns:minmax(0,1fr)}
  .channel-wall{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:900px){
  :root{--space:60px}
  .main-nav{
    position:absolute;left:0;right:0;top:100%;
    flex-direction:column;align-items:stretch;gap:2px;
    background:#fff;border-bottom:1px solid var(--line);
    padding:12px 18px 18px;
    box-shadow:0 22px 40px rgba(15,29,51,.14);
    display:none;
  }
  .main-nav.is-open{display:flex}
  .main-nav a{padding:12px 14px;border-radius:10px;font-size:15px}
  .main-nav a.active::after{display:none}
  .main-nav a.active{background:#eef4ff}
  .nav-toggle{display:flex}
  .nav-cta{display:none}
  .hero{padding:52px 0 62px}
  .hero-inner{grid-template-columns:minmax(0,1fr);gap:34px}
  .hero-title{font-size:30px}
  .hero-points{grid-template-columns:minmax(0,1fr);gap:10px}
  .steps{grid-template-columns:minmax(0,1fr)}
  .rule-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cost-list{grid-template-columns:minmax(0,1fr)}
  .audience-grid{grid-template-columns:minmax(0,1fr)}
  .myth-list{grid-template-columns:minmax(0,1fr)}
  .faq-list{grid-template-columns:minmax(0,1fr)}
  .news-main{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:30px}
  .cta-band{padding:40px 28px}
}
@media (max-width:640px){
  .download-grid{grid-template-columns:minmax(0,1fr)}
  .feature-grid{grid-template-columns:minmax(0,1fr)}
  .guarantee-grid{grid-template-columns:minmax(0,1fr)}
  .metric-strip{grid-template-columns:repeat(2,minmax(0,1fr))}
  .section-title{font-size:24px}
  .hero-title{font-size:26px}
  .hero-lead{font-size:14.6px}
  .calc-form{grid-template-columns:minmax(0,1fr)}
  .calc-result .result-grid{grid-template-columns:minmax(0,1fr)}
  .topbar-links{gap:12px}
  .topbar{font-size:12px}
  .cta-band h2{font-size:21px}
  .hero-panel{padding:22px 18px}
  .download-copy h2{font-size:22px}
}
@media (max-width:420px){
  .site-container{padding:0 16px}
  .brand-text strong{font-size:15.5px}
  .brand-text small{letter-spacing:1.6px}
  .rule-grid{grid-template-columns:minmax(0,1fr)}
  .metric-strip{grid-template-columns:minmax(0,1fr)}
}

/* roulang page: article */
:root{
  --brand:#1d4ed8;
  --brand-deep:#0f2557;
  --brand-2:#2563eb;
  --brand-3:#0ea5b7;
  --accent:#f59e0b;
  --ink:#0f1d33;
  --ink-soft:#33465f;
  --muted:#657891;
  --line:#e3eaf5;
  --bg:#f5f8fd;
  --bg-alt:#edf3fb;
  --card:#ffffff;
  --radius-lg:26px;
  --radius:16px;
  --radius-sm:10px;
  --shadow-sm:0 6px 18px rgba(15,29,51,.06);
  --shadow:0 16px 38px rgba(15,29,51,.09);
  --shadow-lg:0 26px 60px rgba(15,29,51,.14);
  --space:76px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.78;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
.site-container{width:100%;max-width:1180px;margin:0 auto;padding:0 22px}
a:focus-visible,button:focus-visible{outline:3px solid rgba(37,99,235,.45);outline-offset:3px}
/* ---------- topbar ---------- */
.topbar{
  background:var(--brand-deep);
  color:rgba(255,255,255,.82);
  font-size:13px;
  letter-spacing:.2px;
}
.topbar-inner{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:42px;flex-wrap:wrap;
}
.topbar-note{display:flex;align-items:center;gap:8px;min-width:0}
.topbar-dot{width:6px;height:6px;border-radius:50%;background:#39d0a6;flex:none;box-shadow:0 0 0 4px rgba(57,208,166,.18)}
.topbar-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.topbar-links a{color:rgba(255,255,255,.86);transition:color .2s ease}
.topbar-links a:hover{color:#fff}
/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.96);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  position:relative;
  display:flex;align-items:center;gap:26px;
  min-height:74px;
}
.brand{display:flex;align-items:center;gap:12px;flex:none}
.brand-mark{
  width:44px;height:44px;border-radius:14px;flex:none;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--brand-2),var(--brand-3));
  color:#fff;font-weight:700;font-size:19px;letter-spacing:1px;
  box-shadow:0 10px 22px rgba(37,99,235,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.brand-text strong{font-size:17px;font-weight:700;letter-spacing:.4px;white-space:nowrap}
.brand-text small{font-size:11.5px;color:var(--muted);letter-spacing:2.6px;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.main-nav a{
  position:relative;
  padding:9px 15px;border-radius:10px;
  font-size:15px;color:var(--ink-soft);font-weight:500;
  transition:background .2s ease,color .2s ease;
  white-space:nowrap;
}
.main-nav a:hover{background:#eef4ff;color:var(--brand)}
.main-nav a.active{color:var(--brand);font-weight:700}
.main-nav a.active::after{
  content:"";position:absolute;left:15px;right:15px;bottom:3px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand-2),var(--brand-3));
}
.nav-cta{
  flex:none;display:inline-flex;align-items:center;gap:7px;
  padding:11px 22px;border-radius:999px;
  background:linear-gradient(135deg,var(--brand-2),var(--brand-3));
  color:#fff;font-size:14.5px;font-weight:600;
  box-shadow:0 10px 24px rgba(37,99,235,.26);
  transition:transform .2s ease,box-shadow .2s ease;
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 16px 30px rgba(37,99,235,.34)}
.nav-toggle{
  display:none;margin-left:auto;
  width:44px;height:40px;border-radius:10px;border:1px solid var(--line);
  background:#fff;color:var(--ink-soft);cursor:pointer;
  align-items:center;justify-content:center;flex-direction:column;gap:4px;
  transition:background .2s ease,border-color .2s ease;
}
.nav-toggle:hover{background:#f1f6ff;border-color:#cad9f2}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink-soft);transition:transform .2s ease,opacity .2s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 28px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1.2;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn-primary{
  background:linear-gradient(135deg,var(--brand-2),var(--brand-3));
  color:#fff;box-shadow:0 14px 28px rgba(37,99,235,.28);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 20px 36px rgba(37,99,235,.34)}
.btn-primary:active{transform:translateY(0);box-shadow:0 10px 20px rgba(37,99,235,.24)}
.btn-line{background:#fff;color:var(--brand);border-color:#c9dbf8}
.btn-line:hover{background:#f2f7ff;border-color:#a9c5f2;transform:translateY(-2px)}
.btn-ghost{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.42)}
.btn-ghost:hover{background:rgba(255,255,255,.24);border-color:rgba(255,255,255,.66)}
/* ---------- page hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  background:linear-gradient(135deg,#0d2049 0%,#1b3f9e 56%,#0b8fa3 100%);
  color:#fff;padding:52px 0 60px;
}
.page-hero::before{
  content:"";position:absolute;width:560px;height:560px;border-radius:50%;
  right:-190px;top:-250px;
  background:radial-gradient(circle,rgba(80,190,255,.34),transparent 62%);
  pointer-events:none;
}
.page-hero::after{
  content:"";position:absolute;width:460px;height:460px;border-radius:50%;
  left:-200px;bottom:-280px;
  background:radial-gradient(circle,rgba(20,220,190,.22),transparent 64%);
  pointer-events:none;
}
.page-hero-inner{position:relative;z-index:2;max-width:900px}
.crumb{display:flex;align-items:center;gap:9px;font-size:13.5px;color:rgba(255,255,255,.72);flex-wrap:wrap}
.crumb a{color:rgba(255,255,255,.9);transition:color .2s ease}
.crumb a:hover{color:#fff}
.crumb span{color:rgba(255,255,255,.42)}
.page-hero h1{
  font-size:34px;line-height:1.4;margin:16px 0 0;
  letter-spacing:.4px;
  overflow-wrap:break-word;
}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.meta-chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:999px;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.24);
  font-size:13px;color:rgba(255,255,255,.92);
}
/* ---------- main ---------- */
main{display:block}
.section{padding:var(--space) 0}
.section-alt{background:var(--bg-alt)}
.section-head{max-width:760px;margin-bottom:34px}
.section-head .eyebrow{
  display:inline-block;padding:5px 14px;border-radius:999px;
  background:#e6efff;color:var(--brand);
  font-size:12.5px;font-weight:600;letter-spacing:.8px;margin-bottom:14px;
}
.section-head h2{font-size:27px;letter-spacing:.3px}
.section-head p{color:var(--muted);margin-top:12px;font-size:15.5px}
/* ---------- article layout ---------- */
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 320px;
  gap:34px;align-items:start;
}
.article-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:38px 40px;box-shadow:var(--shadow);
  min-width:0;
}
.prose{font-size:16.5px;color:var(--ink-soft);line-height:1.95;overflow-wrap:break-word}
.prose > *:first-child{margin-top:0}
.prose h2{
  font-size:23px;color:var(--ink);margin:38px 0 14px;padding-left:14px;
  border-left:4px solid var(--brand-2);line-height:1.4;
}
.prose h3{font-size:18.5px;color:var(--ink);margin:26px 0 10px}
.prose h4{font-size:16.5px;color:var(--ink);margin:20px 0 8px}
.prose p{margin:14px 0}
.prose ul,.prose ol{margin:14px 0;padding-left:22px;list-style:disc}
.prose ol{list-style:decimal}
.prose li{margin:8px 0}
.prose a{color:var(--brand);border-bottom:1px solid rgba(37,99,235,.3);transition:color .2s ease,border-color .2s ease}
.prose a:hover{color:var(--brand-3);border-color:var(--brand-3)}
.prose img{border-radius:var(--radius);margin:20px 0;box-shadow:var(--shadow-sm)}
.prose blockquote{
  margin:22px 0;padding:18px 22px;border-left:4px solid var(--brand-3);
  background:#f2f9fb;border-radius:0 var(--radius) var(--radius) 0;color:var(--ink-soft);
}
.prose table{width:100%;border-collapse:collapse;margin:20px 0;font-size:15px}
.prose th,.prose td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.prose th{background:#f2f7ff;color:var(--ink)}
.prose strong{color:var(--ink)}
.notice-empty{
  background:#fff8ec;border:1px solid #f7e0b8;border-radius:var(--radius);
  padding:26px;text-align:center;color:#8a5b12;font-size:16px;
}
.notice-empty .btn{margin-top:18px}
/* ---------- sidebar ---------- */
.side-stack{display:grid;gap:20px;min-width:0}
.side-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow-sm);
}
.side-card h3{font-size:16.5px;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.side-card h3::before{
  content:"";width:6px;height:18px;border-radius:3px;
  background:linear-gradient(180deg,var(--brand-2),var(--brand-3));
}
.side-list li{
  padding:11px 0;border-bottom:1px dashed var(--line);
  font-size:14.5px;color:var(--ink-soft);
}
.side-list li:last-child{border-bottom:0;padding-bottom:0}
.side-list li span{display:block;font-size:12.5px;color:var(--muted);margin-top:4px}
.side-dl{display:grid;gap:10px}
.side-dl a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 16px;border-radius:12px;border:1px solid #d7e5fa;
  background:#f4f9ff;color:var(--brand);font-size:14.5px;font-weight:600;
  transition:background .2s ease,transform .2s ease,border-color .2s ease;
}
.side-dl a:hover{background:#e8f2ff;border-color:#b9d4f7;transform:translateX(3px)}
.side-dl a em{font-style:normal;color:var(--muted);font-size:12.5px;font-weight:400}
/* ---------- points grid ---------- */
.point-grid{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;
}
.point-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 22px;box-shadow:var(--shadow-sm);min-width:0;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.point-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#cfe0f8}
.point-icon{
  width:44px;height:44px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,#e8f1ff,#dff6f8);color:var(--brand);
  font-weight:700;font-size:16px;margin-bottom:16px;
}
.point-card h3{font-size:17px;margin-bottom:9px}
.point-card p{font-size:14.5px;color:var(--muted);line-height:1.8}
/* ---------- metric band ---------- */
.metric-band{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;
}
.metric-item{
  background:linear-gradient(150deg,#102a5e,#1c47a8 62%,#0f8f9f);
  color:#fff;border-radius:var(--radius);padding:26px 24px;min-width:0;
  box-shadow:var(--shadow);position:relative;overflow:hidden;
}
.metric-item::after{
  content:"";position:absolute;width:150px;height:150px;border-radius:50%;
  right:-60px;bottom:-70px;background:rgba(255,255,255,.09);
}
.metric-item strong{display:block;font-size:16.5px;margin-bottom:8px}
.metric-item p{font-size:14px;color:rgba(255,255,255,.8);line-height:1.8}
/* ---------- risk list ---------- */
.risk-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 26px}
.risk-list li{
  display:flex;gap:12px;align-items:flex-start;
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px 20px;font-size:14.8px;color:var(--ink-soft);min-width:0;
  box-shadow:var(--shadow-sm);
}
.risk-list li b{color:var(--ink);display:block;margin-bottom:4px;font-size:15.5px}
.risk-mark{
  width:26px;height:26px;border-radius:9px;flex:none;margin-top:2px;
  display:flex;align-items:center;justify-content:center;
  background:#e8f1ff;color:var(--brand);font-size:13px;font-weight:700;
}
/* ---------- faq ---------- */
.faq-list{display:grid;gap:14px;max-width:900px}
.faq-item{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 24px;box-shadow:var(--shadow-sm);min-width:0;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:#cfe0f8;box-shadow:var(--shadow)}
.faq-item h3{font-size:16.5px;margin-bottom:9px;color:var(--ink)}
.faq-item p{font-size:14.8px;color:var(--muted);line-height:1.85}
/* ---------- download ---------- */
.download-section{
  position:relative;overflow:hidden;
  background:linear-gradient(135deg,#0d2049,#1b3f9e 58%,#0b8fa3);
  color:#fff;padding:64px 0;
}
.download-section::before{
  content:"";position:absolute;width:520px;height:520px;border-radius:50%;
  right:-160px;top:-220px;background:radial-gradient(circle,rgba(90,200,255,.3),transparent 62%);
  pointer-events:none;
}
.download-inner{position:relative;z-index:2;display:grid;gap:30px;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);align-items:center}
.download-copy h2{font-size:28px;letter-spacing:.3px}
.download-copy p{color:rgba(255,255,255,.82);margin-top:14px;font-size:15.5px;max-width:520px}
.download-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.download-card{
  display:flex;flex-direction:column;gap:8px;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.24);
  border-radius:var(--radius);padding:22px 18px;min-width:0;
  transition:background .22s ease,transform .22s ease,border-color .22s ease;
}
.download-card:hover{background:rgba(255,255,255,.2);border-color:rgba(255,255,255,.5);transform:translateY(-4px)}
.download-card strong{font-size:16px}
.download-card span{font-size:12.5px;color:rgba(255,255,255,.76)}
.download-card em{
  font-style:normal;margin-top:6px;font-size:13.5px;font-weight:600;
  color:#7ef0cf;
}
/* ---------- cta band ---------- */
.cta-band{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:36px 40px;display:flex;align-items:center;justify-content:space-between;
  gap:26px;box-shadow:var(--shadow);flex-wrap:wrap;
}
.cta-band h2{font-size:23px}
.cta-band p{color:var(--muted);font-size:15px;margin-top:10px;max-width:640px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
/* ---------- footer ---------- */
.site-footer{
  background:#0b1a33;color:rgba(255,255,255,.72);
  padding:56px 0 26px;margin-top:0;
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:36px;
  padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand .brand-mark{box-shadow:none}
.footer-brand strong{display:block;color:#fff;font-size:16.5px;letter-spacing:.4px}
.footer-brand small{display:block;color:rgba(255,255,255,.55);font-size:11.5px;letter-spacing:2.4px}
.footer-desc{font-size:14px;line-height:1.85;color:rgba(255,255,255,.6);max-width:420px}
.footer-col h3{font-size:15px;color:#fff;margin-bottom:16px;letter-spacing:.4px}
.footer-col ul{display:grid;gap:11px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.66);transition:color .2s ease}
.footer-col a:hover{color:#7ef0cf}
.friend-links{padding:26px 0;border-bottom:1px solid rgba(255,255,255,.12)}
.friend-links h3{font-size:15px;color:#fff;margin-bottom:14px}
.link-wrap{display:flex;flex-wrap:wrap;gap:10px 18px}
.link-wrap a{
  font-size:13.5px;color:rgba(255,255,255,.62);
  padding:5px 12px;border-radius:999px;border:1px solid rgba(255,255,255,.14);
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.link-wrap a:hover{color:#fff;border-color:rgba(126,240,207,.6);background:rgba(126,240,207,.1)}
.footer-bottom{
  padding-top:22px;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.5);
}
/* ---------- responsive ---------- */
@media (max-width:1024px){
  :root{--space:56px}
  .hero-inner{grid-template-columns:1fr;gap:36px}
  .article-layout{grid-template-columns:1fr}
  .point-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .metric-band{grid-template-columns:1fr 1fr}
  .download-inner{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .page-hero h1{font-size:29px}
  .main-nav{gap:2px}
  .main-nav a{padding:9px 11px;font-size:14.5px}
}
@media (max-width:900px){
  .nav-toggle{display:flex}
  .nav-cta{display:none}
  .main-nav{
    position:absolute;left:0;right:0;top:100%;
    display:none;flex-direction:column;align-items:stretch;gap:4px;
    margin:0;padding:14px 18px 20px;
    background:#fff;border-bottom:1px solid var(--line);
    box-shadow:0 18px 32px rgba(15,29,51,.12);
  }
  .main-nav.open{display:flex}
  .main-nav a{padding:12px 14px;border-radius:10px;font-size:15px}
  .main-nav a.active::after{display:none}
}
@media (max-width:768px){
  :root{--space:48px}
  .section-head h2{font-size:23px}
  .article-card{padding:26px 22px}
  .prose{font-size:16px}
  .prose h2{font-size:20px}
  .risk-list{grid-template-columns:1fr}
  .metric-band{grid-template-columns:1fr}
  .download-grid{grid-template-columns:1fr}
  .cta-band{padding:28px 24px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .page-hero{padding:40px 0 46px}
  .download-copy h2{font-size:23px}
}
@media (max-width:520px){
  .brand-text small{display:none}
  .brand-text strong{font-size:15.5px}
  .page-hero h1{font-size:23px}
  .point-grid{grid-template-columns:1fr}
  .btn{width:100%;padding:13px 20px}
  .cta-actions{width:100%}
  .article-card{padding:22px 18px}
  .side-card{padding:20px}
  .topbar-links{gap:12px;font-size:12.5px}
}

/* roulang page: category1 */
:root{
  --brand:#1d4ed8;
  --brand-deep:#0f2557;
  --brand-2:#2563eb;
  --brand-3:#0ea5b7;
  --accent:#f59e0b;
  --ink:#0f1d33;
  --ink-soft:#33465f;
  --muted:#657891;
  --line:#e3eaf5;
  --bg:#f5f8fd;
  --bg-alt:#edf3fb;
  --card:#ffffff;
  --radius-lg:26px;
  --radius:16px;
  --radius-sm:10px;
  --shadow-sm:0 6px 18px rgba(15,29,51,.06);
  --shadow:0 16px 38px rgba(15,29,51,.09);
  --shadow-lg:0 26px 60px rgba(15,29,51,.14);
  --space:64px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.78;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a:focus-visible,button:focus-visible{outline:3px solid rgba(37,99,235,.45);outline-offset:2px;border-radius:8px}
.site-container{width:100%;max-width:1180px;margin:0 auto;padding:0 22px}

/* ---------- topbar ---------- */
.topbar{background:var(--brand-deep);color:rgba(255,255,255,.82);font-size:13px;letter-spacing:.2px}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:42px;flex-wrap:wrap}
.topbar-note{display:flex;align-items:center;gap:8px;min-width:0}
.topbar-dot{width:6px;height:6px;border-radius:50%;background:#39d0a6;flex:none;box-shadow:0 0 0 4px rgba(57,208,166,.18)}
.topbar-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.topbar-links a{color:rgba(255,255,255,.86);transition:color .2s ease}
.topbar-links a:hover{color:#fff}
.topbar-links a span{color:rgba(255,255,255,.5);margin-right:4px}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header-inner{position:relative;display:flex;align-items:center;gap:26px;min-height:74px}
.brand{display:flex;align-items:center;gap:12px;flex:none}
.brand-mark{width:44px;height:44px;border-radius:14px;flex:none;display:flex;align-items:center;justify-content:center;background:linear-gradient(140deg,var(--brand-2),var(--brand-3));color:#fff;font-weight:700;font-size:19px;letter-spacing:1px;box-shadow:0 10px 22px rgba(37,99,235,.28)}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.brand-text strong{font-size:17px;font-weight:700;letter-spacing:.4px;white-space:nowrap}
.brand-text small{font-size:11.5px;color:var(--muted);letter-spacing:2.6px;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.main-nav a{position:relative;padding:9px 15px;border-radius:10px;font-size:15px;color:var(--ink-soft);font-weight:500;transition:background .2s ease,color .2s ease;white-space:nowrap}
.main-nav a:hover{background:#eef4ff;color:var(--brand)}
.main-nav a.active{color:var(--brand);font-weight:700}
.main-nav a.active::after{content:"";position:absolute;left:15px;right:15px;bottom:3px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--brand-2),var(--brand-3))}
.nav-cta{flex:none;display:inline-flex;align-items:center;gap:7px;padding:11px 22px;border-radius:999px;background:linear-gradient(135deg,var(--brand-2),var(--brand-3));color:#fff;font-size:14.5px;font-weight:600;box-shadow:0 10px 24px rgba(37,99,235,.26);transition:transform .2s ease,box-shadow .2s ease}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 16px 30px rgba(37,99,235,.34)}
.nav-toggle{display:none;margin-left:auto;width:44px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--ink-soft);cursor:pointer;align-items:center;justify-content:center;flex-direction:column;gap:4px;transition:background .2s ease,border-color .2s ease}
.nav-toggle:hover{background:#f1f6ff;border-color:#cad9f2}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink-soft);transition:transform .2s ease,opacity .2s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 28px;border-radius:999px;border:1px solid transparent;font-size:15px;font-weight:600;line-height:1.2;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease}
.btn-primary{background:linear-gradient(135deg,var(--brand-2),var(--brand-3));color:#fff;box-shadow:0 14px 28px rgba(37,99,235,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 20px 36px rgba(37,99,235,.34)}
.btn-primary:active{transform:translateY(0);box-shadow:0 10px 20px rgba(37,99,235,.24)}
.btn-line{background:#fff;color:var(--brand);border-color:#c9dbf8}
.btn-line:hover{background:#f2f7ff;border-color:#a9c5f2;transform:translateY(-2px)}

/* ---------- cat hero ---------- */
.cat-hero{position:relative;overflow:hidden;padding:54px 0 62px;background:linear-gradient(180deg,#eaf2ff 0%,var(--bg) 100%)}
.cat-hero::before{content:"";position:absolute;width:520px;height:520px;border-radius:50%;right:-200px;top:-240px;background:radial-gradient(circle,rgba(37,99,235,.16),transparent 64%);pointer-events:none}
.cat-hero::after{content:"";position:absolute;width:420px;height:420px;border-radius:50%;left:-180px;bottom:-240px;background:radial-gradient(circle,rgba(14,165,183,.14),transparent 64%);pointer-events:none}
.cat-hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1.06fr) minmax(0,.94fr);gap:42px;align-items:start}
.cat-eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 15px;border-radius:999px;background:#fff;border:1px solid #d5e3fa;color:var(--brand);font-size:13px;font-weight:600;letter-spacing:.4px;margin-bottom:18px;box-shadow:var(--shadow-sm)}
.cat-eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--brand-3);display:inline-block}
.cat-hero h1{font-size:clamp(27px,3.3vw,40px);letter-spacing:-.4px;margin-bottom:18px}
.cat-hero h1 em{font-style:normal;background:linear-gradient(120deg,var(--brand),var(--brand-3));-webkit-background-clip:text;background-clip:text;color:transparent}
.cat-lead{font-size:16.5px;color:var(--ink-soft);max-width:640px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 18px;margin-top:28px}
.hero-points li{display:flex;gap:9px;align-items:flex-start;font-size:14.5px;color:var(--ink-soft);min-width:0}
.hero-points li::before{content:"";flex:none;width:7px;height:7px;margin-top:9px;border-radius:50%;background:linear-gradient(135deg,var(--brand-2),var(--brand-3))}

.param-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:24px 26px 22px}
.panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:14px;border-bottom:1px solid var(--line)}
.panel-head h2{font-size:16.5px}
.panel-tag{flex:none;font-size:12px;font-weight:600;color:var(--brand-3);background:#e7f8fb;border:1px solid #c4eef4;border-radius:999px;padding:3px 10px}
.param-row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:13px 0;border-bottom:1px dashed var(--line)}
.param-row:last-of-type{border-bottom:0}
.pr-label{font-size:14.5px;color:var(--ink-soft);min-width:0}
.pr-value{font-size:15px;font-weight:700;color:var(--brand);white-space:nowrap}
.panel-note{font-size:12.8px;color:var(--muted);margin-top:8px;line-height:1.7}
.panel-btn{width:100%;margin-top:16px;padding:12px 18px;font-size:14.5px}

/* ---------- sections ---------- */
.section{padding:var(--space) 0}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:34px}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;color:var(--brand-3);letter-spacing:1px;margin-bottom:10px}
.section-head h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:12px;letter-spacing:-.2px}
.section-head p{color:var(--muted);font-size:15.5px}

/* pain cards */
.pain-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.pain-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm);min-width:0;transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}
.pain-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#cfdff8}
.pain-card h3{font-size:17px;margin-bottom:9px}
.pain-card p{font-size:15px;color:var(--ink-soft)}
.pain-index{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:9px;background:#eef4ff;color:var(--brand);font-size:13.5px;font-weight:700;margin-bottom:12px}

/* spec grid */
.spec-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.spec-item{position:relative;background:#fff;border:1px solid var(--line);border-left:4px solid var(--brand-3);border-radius:var(--radius);padding:22px 24px;min-width:0;transition:box-shadow .22s ease,transform .22s ease}
.spec-item:hover{box-shadow:var(--shadow-sm);transform:translateY(-2px)}
.spec-item h3{font-size:16.5px;margin-bottom:8px;display:flex;align-items:center;gap:8px}
.spec-item h3 b{font-size:12px;font-weight:700;color:var(--brand);background:#eef4ff;border-radius:6px;padding:2px 7px}
.spec-item p{font-size:15px;color:var(--ink-soft)}
.spec-tip{margin-top:20px;background:#fff8e8;border:1px solid #f6e2b8;border-radius:var(--radius);padding:16px 20px;font-size:14.5px;color:#8a5b06}

/* steps */
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.step-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;min-width:0;box-shadow:var(--shadow-sm);transition:transform .22s ease,box-shadow .22s ease}
.step-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.step-num{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:11px;background:linear-gradient(135deg,var(--brand-2),var(--brand-3));color:#fff;font-weight:700;font-size:15px;margin-bottom:13px;box-shadow:0 10px 20px rgba(37,99,235,.22)}
.step-card h3{font-size:16.5px;margin-bottom:8px}
.step-card p{font-size:14.8px;color:var(--ink-soft)}

/* split checklist */
.check-split{display:grid;grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);gap:38px;align-items:start}
.check-split .section-head{margin-bottom:18px}
.check-copy p{color:var(--ink-soft);font-size:15.5px}
.check-copy p + p{margin-top:12px}
.check-list{display:grid;gap:12px}
.check-list li{position:relative;background:#fff;border:1px solid var(--line);border-radius:12px;padding:15px 18px 15px 46px;font-size:15px;color:var(--ink-soft);box-shadow:var(--shadow-sm);min-width:0}
.check-list li strong{display:block;color:var(--ink);font-size:15.5px;margin-bottom:3px}
.check-list li::before{content:"✓";position:absolute;left:15px;top:15px;width:20px;height:20px;border-radius:50%;background:#e6f8f1;color:#0f9a6f;font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center}

/* fee */
.fee-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.fee-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;min-width:0;box-shadow:var(--shadow-sm)}
.fee-card h3{font-size:16.5px;margin-bottom:8px;color:var(--brand-deep)}
.fee-card p{font-size:15px;color:var(--ink-soft)}

/* scenes */
.scene-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.scene-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;min-width:0;overflow:hidden;transition:transform .22s ease,box-shadow .22s ease}
.scene-card::before{content:"";position:absolute;left:0;top:0;height:4px;width:100%;background:linear-gradient(90deg,var(--brand-2),var(--brand-3))}
.scene-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.scene-card h3{font-size:17px;margin-bottom:10px}
.scene-card p{font-size:14.9px;color:var(--ink-soft)}
.scene-tag{display:inline-block;font-size:12.5px;font-weight:600;color:var(--brand);background:#eef4ff;border-radius:999px;padding:3px 11px;margin-bottom:12px}

/* news */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.news-card{display:flex;flex-direction:column;gap:10px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;min-width:0;box-shadow:var(--shadow-sm);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#cfdff8}
.news-card h3{font-size:16.5px;line-height:1.55}
.news-date{font-size:13px;color:var(--muted)}
.news-more{margin-top:auto;font-size:13.5px;font-weight:600;color:var(--brand)}
.empty-tip{background:#fff;border:1px dashed #c9dbf8;border-radius:var(--radius);padding:24px;color:var(--muted);font-size:15px;text-align:center}

/* faq */
.faq-list{display:grid;gap:14px;max-width:900px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow:hidden}
.faq-item summary{list-style:none;cursor:pointer;padding:19px 22px;font-size:16px;font-weight:600;color:var(--ink);display:flex;align-items:center;justify-content:space-between;gap:14px;transition:background .2s ease}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{background:#f7faff}
.faq-item summary::after{content:"+";flex:none;width:24px;height:24px;border-radius:50%;background:#eef4ff;color:var(--brand);font-size:16px;font-weight:700;display:flex;align-items:center;justify-content:center;transition:transform .2s ease}
.faq-item[open] summary::after{content:"−";transform:rotate(180deg)}
.faq-body{padding:0 22px 20px;color:var(--ink-soft);font-size:15px}

/* download */
.download-panel{position:relative;overflow:hidden;border-radius:var(--radius-lg);padding:42px;background:linear-gradient(130deg,#0d2049 0%,#1b3f9e 56%,#0b8fa3 100%);color:#fff;display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);gap:36px;align-items:center;box-shadow:var(--shadow-lg)}
.download-panel::before{content:"";position:absolute;width:460px;height:460px;border-radius:50%;right:-160px;top:-220px;background:radial-gradient(circle,rgba(120,210,255,.32),transparent 62%);pointer-events:none}
.dl-tag{display:inline-block;font-size:12.5px;font-weight:600;letter-spacing:1px;padding:5px 13px;border-radius:999px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.28);margin-bottom:16px}
.download-copy{position:relative;z-index:2}
.download-copy h2{font-size:clamp(22px,2.4vw,29px);margin-bottom:12px}
.download-copy p{color:rgba(255,255,255,.84);font-size:15.5px;max-width:600px}
.dl-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.btn-dl{background:#fff;color:var(--brand-deep);box-shadow:0 12px 26px rgba(5,20,45,.28)}
.btn-dl:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(5,20,45,.34);background:#f4f8ff}
.dl-side{position:relative;z-index:2;display:grid;gap:12px;min-width:0}
.dl-side-item{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.24);border-radius:14px;padding:15px 18px;min-width:0}
.dl-side-item strong{display:block;font-size:15px;margin-bottom:3px}
.dl-side-item span{font-size:13.5px;color:rgba(255,255,255,.78)}

/* footer */
.site-footer{background:#0b1a33;color:rgba(255,255,255,.76);padding:54px 0 26px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr) minmax(0,1fr);gap:38px;padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,.12)}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand .brand-mark{width:42px;height:42px;border-radius:13px}
.footer-brand strong{display:block;color:#fff;font-size:16.5px;letter-spacing:.4px}
.footer-brand small{display:block;font-size:11.5px;color:rgba(255,255,255,.55);letter-spacing:2.4px}
.footer-desc{font-size:14px;line-height:1.85;color:rgba(255,255,255,.66);max-width:520px}
.footer-col h3{color:#fff;font-size:15px;margin-bottom:14px;letter-spacing:.5px}
.footer-col ul{display:grid;gap:9px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.7);transition:color .2s ease}
.footer-col a:hover{color:#8ed6ff}
.friend-links{padding:24px 0;border-bottom:1px solid rgba(255,255,255,.12)}
.friend-links h3{color:#fff;font-size:15px;margin-bottom:12px}
.link-wrap{display:flex;flex-wrap:wrap;gap:10px 18px;min-height:4px}
.link-wrap a{font-size:13.8px;color:rgba(255,255,255,.68);transition:color .2s ease}
.link-wrap a:hover{color:#8ed6ff}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;padding-top:20px;font-size:13px;color:rgba(255,255,255,.5)}

@media (max-width:1024px){
  .cat-hero-inner{grid-template-columns:minmax(0,1fr);gap:32px}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .download-panel{grid-template-columns:minmax(0,1fr);padding:34px}
  .footer-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:30px}
}
@media (max-width:900px){
  .nav-toggle{display:flex}
  .nav-cta{display:none}
  .main-nav{display:none;position:absolute;left:0;right:0;top:100%;margin-left:0;flex-direction:column;align-items:stretch;gap:4px;padding:14px 18px 18px;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 22px 40px rgba(15,29,51,.12)}
  .main-nav.is-open{display:flex}
  .main-nav a{padding:12px 14px;font-size:15.5px;border-radius:10px}
  .main-nav a.active::after{display:none}
  .main-nav a.active{background:#eef4ff}
  .header-inner{min-height:68px;gap:16px}
  .brand-text small{letter-spacing:1.8px}
}
@media (max-width:768px){
  :root{--space:48px}
  .cat-hero{padding:40px 0 48px}
  .hero-points{grid-template-columns:minmax(0,1fr)}
  .pain-grid,.spec-grid,.fee-grid,.steps,.scene-grid,.news-grid{grid-template-columns:minmax(0,1fr)}
  .check-split{grid-template-columns:minmax(0,1fr);gap:24px}
  .download-panel{padding:26px}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:6px}
  .param-panel{padding:20px}
}
@media (max-width:520px){
  .site-container{padding:0 16px}
  .brand-text strong{font-size:15.5px}
  .brand-text small{font-size:10.5px;letter-spacing:1.4px}
  .btn{width:100%;padding:13px 18px}
  .dl-actions .btn{width:100%}
  .hero-actions .btn{width:100%}
  .pain-card,.spec-item,.step-card,.scene-card,.fee-card,.news-card{padding:19px}
  .topbar-links{font-size:12.5px;gap:12px}
}