/* roulang page: index */
:root{
  --deep:#0b3b39;
  --deep-2:#082e2d;
  --deep-3:#0f4a46;
  --ink:#142a28;
  --muted:#5c716e;
  --line:#e0eae6;
  --bg:#f5f9f7;
  --card:#ffffff;
  --accent:#e58b3c;
  --accent-dark:#c9701f;
  --mint:#e8f4ef;
  --radius-s:10px;
  --radius:16px;
  --radius-l:24px;
  --shadow-s:0 4px 14px rgba(11,59,57,.06);
  --shadow:0 14px 34px rgba(11,59,57,.10);
  --shadow-l:0 26px 60px rgba(11,59,57,.16);
  --sp:clamp(48px,7vw,88px);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--deep-3);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--accent-dark);}
button{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding-left:0;list-style:none;}
:focus-visible{outline:3px solid rgba(229,139,60,.55);outline-offset:2px;border-radius:6px;}

.tf-container{
  width:100%;
  max-width:1180px;
  margin:0 auto;
  padding:0 22px;
}

/* ---------- header ---------- */
.tf-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.tf-nav-wrap{
  position:relative;
  display:flex;
  align-items:center;
  gap:26px;
  min-height:72px;
}
.tf-logo{
  display:inline-flex;
  align-items:center;
  gap:11px;
  flex:0 0 auto;
  min-width:0;
}
.tf-logo-mark{
  width:42px;height:42px;
  flex:0 0 42px;
  border-radius:12px;
  background:linear-gradient(150deg,var(--deep) 0%,var(--deep-3) 55%,#17605a 100%);
  color:#fff;
  font-size:20px;
  font-weight:700;
  display:grid;
  place-items:center;
  box-shadow:0 8px 18px rgba(11,59,57,.24);
}
.tf-logo-text{
  display:flex;
  flex-direction:column;
  line-height:1.15;
  font-size:17px;
  font-weight:800;
  letter-spacing:.4px;
  color:var(--deep);
  white-space:nowrap;
}
.tf-logo-sub{
  font-size:11px;
  font-weight:500;
  letter-spacing:2px;
  color:var(--muted);
}
.tf-nav{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:12px;
  flex:1 1 auto;
  min-width:0;
}
.tf-nav a{
  padding:9px 14px;
  border-radius:999px;
  font-size:15px;
  color:#3d5350;
  white-space:nowrap;
  transition:background .2s ease,color .2s ease;
}
.tf-nav a:hover{background:var(--mint);color:var(--deep);}
.tf-nav a.is-active{background:var(--deep);color:#fff;}
.tf-nav-actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.tf-nav-toggle{
  display:none;
  width:42px;height:42px;
  border:1px solid var(--line);
  border-radius:12px;
  background:#fff;
  color:var(--deep);
  font-size:17px;
  cursor:pointer;
  align-items:center;
  justify-content:center;
}

/* ---------- buttons ---------- */
.tf-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 22px;
  border-radius:999px;
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
  text-align:center;
}
.tf-btn-primary{
  background:var(--accent);
  color:#2a1704;
  box-shadow:0 10px 22px rgba(229,139,60,.32);
}
.tf-btn-primary:hover{background:#ef9a4d;color:#20120a;transform:translateY(-2px);box-shadow:0 14px 28px rgba(229,139,60,.38);}
.tf-btn-primary:active{transform:translateY(0);}
.tf-btn-ghost{
  background:#fff;
  color:var(--deep);
  border-color:var(--line);
}
.tf-btn-ghost:hover{border-color:var(--deep);color:var(--deep);transform:translateY(-2px);}
.tf-btn-line{
  background:transparent;
  color:#eaf5f0;
  border-color:rgba(255,255,255,.4);
}
.tf-btn-line:hover{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.75);}
.tf-btn-block{width:100%;}

/* ---------- hero ---------- */
.tf-hero{
  position:relative;
  background:radial-gradient(1100px 480px at 82% -12%,#17605a 0%,rgba(23,96,90,0) 62%),
             linear-gradient(165deg,var(--deep) 0%,var(--deep-2) 58%,#062827 100%);
  color:#e9f4f0;
  padding:clamp(42px,6vw,74px) 0 clamp(46px,6vw,76px);
  overflow:hidden;
}
.tf-hero::after{
  content:"";
  position:absolute;
  inset:auto -12% -55% -12%;
  height:320px;
  background:radial-gradient(closest-side,rgba(229,139,60,.20),rgba(229,139,60,0));
  pointer-events:none;
}
.tf-hero-grid{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:minmax(0,1.32fr) minmax(0,.88fr);
  gap:clamp(28px,4vw,56px);
  align-items:center;
}
.tf-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border-radius:999px;
  background:rgba(255,255,255,.10);
  border:1px solid rgba(255,255,255,.22);
  font-size:13px;
  letter-spacing:.6px;
  color:#d8ece5;
}
.tf-badge i{color:var(--accent);}
.tf-hero h1{
  margin:18px 0 0;
  font-size:clamp(26px,3.6vw,40px);
  line-height:1.32;
  font-weight:800;
  letter-spacing:.4px;
  color:#ffffff;
}
.tf-hero-lead{
  margin-top:18px;
  font-size:16px;
  line-height:1.85;
  color:#c6ddd6;
  max-width:620px;
}
.tf-hero-points{
  margin-top:22px;
  display:grid;
  grid-template-columns:repeat(1,minmax(0,1fr));
  gap:10px;
  max-width:600px;
}
.tf-hero-points li{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:15px;
  color:#dcece7;
}
.tf-hero-points i{
  color:var(--accent);
  margin-top:4px;
  font-size:14px;
}
.tf-hero-cta{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:28px;
}
.tf-hero-meta{
  margin-top:20px;
  font-size:13px;
  color:#9fc2b9;
  letter-spacing:.3px;
}
.tf-hero-panel{
  min-width:0;
}
.tf-ring-card{
  background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.18);
  border-radius:var(--radius-l);
  padding:26px 24px;
  box-shadow:var(--shadow-l);
  backdrop-filter:blur(4px);
}
.tf-ring-card-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-bottom:20px;
}
.tf-ring-card-head strong{font-size:15px;color:#fff;letter-spacing:.5px;}
.tf-ring-card-head span{font-size:12px;color:#9fc2b9;}
.tf-ring{
  width:172px;
  height:172px;
  margin:0 auto;
  border-radius:50%;
  background:conic-gradient(var(--accent) 0% 66%,rgba(255,255,255,.14) 66% 100%);
  display:grid;
  place-items:center;
}
.tf-ring-inner{
  width:128px;
  height:128px;
  border-radius:50%;
  background:#0a3433;
  display:grid;
  place-items:center;
  align-content:center;
  text-align:center;
}
.tf-ring-num{font-size:26px;font-weight:800;color:#fff;line-height:1.1;}
.tf-ring-label{font-size:12px;color:#9fc2b9;margin-top:4px;display:block;}
.tf-param-list{
  margin-top:22px;
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:10px;
}
.tf-param-item{
  background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.12);
  border-radius:12px;
  padding:11px 13px;
  min-width:0;
}
.tf-param-item dt{font-size:12px;color:#9fc2b9;margin-bottom:3px;}
.tf-param-item dd{margin:0;font-size:14px;font-weight:700;color:#fff;}
.tf-note{
  margin-top:16px;
  font-size:12px;
  line-height:1.7;
  color:#8fb3aa;
}

/* ---------- generic section ---------- */
.tf-section{padding:var(--sp) 0;}
.tf-section.is-alt{background:#eef5f1;}
.tf-section.is-white{background:#fff;}
.tf-section-head{max-width:760px;margin-bottom:clamp(26px,3.6vw,42px);}
.tf-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:700;
  letter-spacing:1.6px;
  color:var(--accent-dark);
  text-transform:uppercase;
}
.tf-eyebrow::before{
  content:"";
  width:22px;height:2px;
  background:var(--accent);
  border-radius:2px;
}
.tf-h2{
  margin-top:12px;
  font-size:clamp(21px,2.6vw,29px);
  line-height:1.4;
  font-weight:800;
  color:var(--deep);
  letter-spacing:.3px;
}
.tf-sub{
  margin-top:12px;
  font-size:15.5px;
  line-height:1.85;
  color:var(--muted);
}

/* ---------- download ---------- */
.tf-download{
  padding:clamp(38px,5vw,60px) 0;
  background:linear-gradient(180deg,#ffffff 0%,#f0f7f4 100%);
  border-bottom:1px solid var(--line);
}
.tf-dl-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  margin-bottom:26px;
}
.tf-dl-head h2{
  font-size:clamp(20px,2.4vw,26px);
  font-weight:800;
  color:var(--deep);
}
.tf-dl-head p{font-size:14.5px;color:var(--muted);margin-top:6px;}
.tf-dl-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:18px;
}
.tf-dl-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:22px 20px;
  display:flex;
  flex-direction:column;
  gap:12px;
  min-width:0;
  box-shadow:var(--shadow-s);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.tf-dl-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#c9dfd6;}
.tf-dl-icon{
  width:44px;height:44px;
  border-radius:13px;
  background:var(--mint);
  color:var(--deep);
  display:grid;
  place-items:center;
  font-size:19px;
}
.tf-dl-name{font-size:16px;font-weight:800;color:var(--deep);}
.tf-dl-desc{font-size:13.5px;line-height:1.7;color:var(--muted);min-height:44px;}
.tf-dl-btn{
  margin-top:auto;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 16px;
  border-radius:999px;
  background:var(--deep);
  color:#fff;
  font-size:14px;
  font-weight:600;
  transition:background .2s ease,transform .2s ease;
}
.tf-dl-btn:hover{background:var(--deep-3);color:#fff;transform:translateY(-2px);}
.tf-dl-foot{
  margin-top:18px;
  font-size:12.5px;
  color:var(--muted);
  line-height:1.8;
}

/* ---------- metrics ---------- */
.tf-metrics{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:16px;
}
.tf-metric{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:20px;
  min-width:0;
  box-shadow:var(--shadow-s);
  transition:transform .2s ease,box-shadow .2s ease;
}
.tf-metric:hover{transform:translateY(-3px);box-shadow:var(--shadow);}
.tf-metric-num{
  font-size:clamp(22px,2.6vw,28px);
  font-weight:800;
  color:var(--deep);
  letter-spacing:.5px;
}
.tf-metric-label{
  margin-top:6px;
  font-size:14px;
  font-weight:700;
  color:#2c4a46;
}
.tf-metric-note{
  margin-top:6px;
  font-size:12.5px;
  line-height:1.7;
  color:var(--muted);
}
.tf-inline-note{
  margin-top:16px;
  font-size:12.5px;
  color:var(--muted);
}

/* ---------- cards / matrix ---------- */
.tf-grid-3{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:18px;
}
.tf-grid-2{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:18px;
}
.tf-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px 22px;
  min-width:0;
  box-shadow:var(--shadow-s);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.tf-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#cde1d9;}
.tf-card-icon{
  width:44px;height:44px;
  border-radius:13px;
  background:linear-gradient(150deg,var(--deep) 0%,var(--deep-3) 100%);
  color:#fff;
  display:grid;
  place-items:center;
  font-size:17px;
  margin-bottom:16px;
}
.tf-card h3{
  font-size:16.5px;
  font-weight:800;
  color:var(--deep);
  margin-bottom:8px;
  line-height:1.5;
}
.tf-card p{font-size:14.5px;line-height:1.8;color:var(--muted);}

/* ---------- compare ---------- */
.tf-compare{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:18px;
}
.tf-compare-col{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px 22px;
  min-width:0;
  box-shadow:var(--shadow-s);
}
.tf-compare-col.is-better{
  background:linear-gradient(165deg,#0b3b39 0%,#0f4a46 100%);
  border-color:transparent;
  color:#dcece7;
  box-shadow:var(--shadow);
}
.tf-compare-col h3{
  font-size:16.5px;
  font-weight:800;
  color:var(--deep);
  margin-bottom:16px;
  display:flex;
  align-items:center;
  gap:9px;
}
.tf-compare-col.is-better h3{color:#fff;}
.tf-compare-item{
  display:flex;
  gap:10px;
  padding:11px 0;
  border-top:1px dashed var(--line);
  font-size:14.5px;
  line-height:1.75;
  color:var(--muted);
}
.tf-compare-col.is-better .tf-compare-item{
  border-top-color:rgba(255,255,255,.16);
  color:#c6ddd6;
}
.tf-compare-item:first-of-type{border-top:0;}
.tf-compare-item i{margin-top:5px;font-size:13px;color:var(--accent);flex:0 0 auto;}
.tf-compare-col:not(.is-better) .tf-compare-item i{color:#a8bdb7;}

/* ---------- flow ---------- */
.tf-flow{
  display:grid;
  grid-template-columns:repeat(5,minmax(0,1fr));
  gap:14px;
}
.tf-step{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:20px 18px;
  min-width:0;
  box-shadow:var(--shadow-s);
  position:relative;
}
.tf-step-num{
  display:inline-grid;
  place-items:center;
  width:30px;height:30px;
  border-radius:50%;
  background:var(--mint);
  color:var(--deep);
  font-size:13px;
  font-weight:800;
  margin-bottom:12px;
}
.tf-step h3{font-size:15px;font-weight:800;color:var(--deep);margin-bottom:8px;line-height:1.5;}
.tf-step p{font-size:13.5px;line-height:1.75;color:var(--muted);}

/* ---------- news ---------- */
.tf-news-grid{
  display:grid;
  grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);
  gap:22px;
  align-items:start;
}
.tf-panel{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px 22px;
  min-width:0;
  box-shadow:var(--shadow-s);
}
.tf-panel-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-bottom:14px;
  margin-bottom:6px;
  border-bottom:1px solid var(--line);
}
.tf-panel-head h3{font-size:16.5px;font-weight:800;color:var(--deep);}
.tf-panel-head span{font-size:12.5px;color:var(--muted);}
.tf-feed-item{
  padding:15px 0;
  border-bottom:1px dashed var(--line);
  min-width:0;
}
.tf-feed-item:last-child{border-bottom:0;padding-bottom:2px;}
.tf-feed-title{
  display:block;
  font-size:15.5px;
  font-weight:700;
  color:var(--deep);
  line-height:1.6;
  word-break:break-word;
}
.tf-feed-title:hover{color:var(--accent-dark);}
.tf-feed-desc{
  margin-top:6px;
  font-size:13.5px;
  line-height:1.75;
  color:var(--muted);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.tf-feed-meta{
  margin-top:9px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-size:12px;
  color:#8ba19c;
}
.tf-tag{
  display:inline-block;
  padding:2px 9px;
  border-radius:999px;
  background:var(--mint);
  color:var(--deep-3);
  font-size:12px;
  font-weight:600;
}
.tf-side-list li{
  display:flex;
  gap:11px;
  padding:12px 0;
  border-bottom:1px dashed var(--line);
  font-size:14px;
  line-height:1.7;
  color:#3d5350;
  min-width:0;
}
.tf-side-list li:last-child{border-bottom:0;}
.tf-side-list .tf-side-dot{
  flex:0 0 auto;
  width:22px;height:22px;
  border-radius:7px;
  background:var(--mint);
  color:var(--deep);
  display:grid;
  place-items:center;
  font-size:11px;
  font-weight:800;
  margin-top:2px;
}
.tf-side-link{
  display:block;
  padding:11px 0;
  border-bottom:1px dashed var(--line);
  font-size:14px;
  line-height:1.7;
  color:var(--deep);
  word-break:break-word;
}
.tf-side-link:last-child{border-bottom:0;}
.tf-side-link:hover{color:var(--accent-dark);}
.tf-empty{
  padding:22px 0;
  font-size:14.5px;
  color:var(--muted);
  text-align:center;
}

/* ---------- posts grid ---------- */
.tf-post-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:18px;
}
.tf-post{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:22px 20px;
  min-width:0;
  display:flex;
  flex-direction:column;
  gap:10px;
  box-shadow:var(--shadow-s);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.tf-post:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#cde1d9;}
.tf-post-title{
  font-size:15.5px;
  font-weight:800;
  color:var(--deep);
  line-height:1.6;
  word-break:break-word;
}
.tf-post-title:hover{color:var(--accent-dark);}
.tf-post-desc{
  font-size:13.5px;
  line-height:1.75;
  color:var(--muted);
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.tf-post-meta{
  margin-top:auto;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-size:12px;
  color:#8ba19c;
  padding-top:6px;
}

/* ---------- topic banner ---------- */
.tf-topic{
  position:relative;
  overflow:hidden;
  border-radius:var(--radius-l);
  background:linear-gradient(120deg,#0b3b39 0%,#0f4a46 62%,#17605a 100%);
  color:#e9f4f0;
  padding:clamp(26px,4vw,42px);
  box-shadow:var(--shadow);
}
.tf-topic::after{
  content:"";
  position:absolute;
  right:-70px;top:-70px;
  width:260px;height:260px;
  border-radius:50%;
  background:radial-gradient(closest-side,rgba(229,139,60,.30),rgba(229,139,60,0));
}
.tf-topic-inner{
  position:relative;
  z-index:2;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:22px;
}
.tf-topic-text{max-width:640px;min-width:0;}
.tf-topic-text h2{
  font-size:clamp(19px,2.3vw,25px);
  font-weight:800;
  color:#fff;
  line-height:1.45;
}
.tf-topic-text p{
  margin-top:10px;
  font-size:14.5px;
  line-height:1.85;
  color:#c6ddd6;
}
.tf-topic .tf-btn-line{flex:0 0 auto;}

/* ---------- guard ---------- */
.tf-guard-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:16px;
}
.tf-guard{
  display:flex;
  gap:14px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:18px;
  min-width:0;
  box-shadow:var(--shadow-s);
  transition:box-shadow .2s ease,transform .2s ease;
}
.tf-guard:hover{transform:translateY(-3px);box-shadow:var(--shadow);}
.tf-guard i{
  flex:0 0 auto;
  width:38px;height:38px;
  border-radius:11px;
  background:var(--mint);
  color:var(--deep-3);
  display:grid;
  place-items:center;
  font-size:15px;
}
.tf-guard-text{min-width:0;}
.tf-guard-text h3{font-size:15px;font-weight:800;color:var(--deep);margin-bottom:5px;}
.tf-guard-text p{font-size:13.5px;line-height:1.7;color:var(--muted);}

/* ---------- audience ---------- */
.tf-audience{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:18px;
}
.tf-audience-col{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px 22px;
  min-width:0;
  box-shadow:var(--shadow-s);
}
.tf-audience-col h3{
  font-size:16.5px;
  font-weight:800;
  color:var(--deep);
  margin-bottom:14px;
  display:flex;
  align-items:center;
  gap:9px;
}
.tf-audience-col h3 i{font-size:15px;color:var(--accent);}
.tf-audience-col li{
  position:relative;
  padding-left:20px;
  font-size:14.5px;
  line-height:1.85;
  color:#3d5350;
  margin-bottom:9px;
}
.tf-audience-col li::before{
  content:"";
  position:absolute;
  left:2px;top:11px;
  width:7px;height:7px;
  border-radius:50%;
  background:#b9cfc8;
}
.tf-audience-col.is-warn li::before{background:var(--accent);}

/* ---------- faq ---------- */
.tf-faq{display:grid;gap:12px;max-width:920px;}
.tf-faq-item{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:4px 20px;
  box-shadow:var(--shadow-s);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.tf-faq-item[open]{border-color:#bcd8ce;box-shadow:var(--shadow);}
.tf-faq-item summary{
  list-style:none;
  cursor:pointer;
  padding:16px 30px 16px 0;
  font-size:15.5px;
  font-weight:700;
  color:var(--deep);
  position:relative;
  line-height:1.65;
}
.tf-faq-item summary::-webkit-details-marker{display:none;}
.tf-faq-item summary::after{
  content:"\002B";
  position:absolute;
  right:0;top:50%;
  transform:translateY(-50%);
  font-size:18px;
  color:var(--accent-dark);
  transition:transform .2s ease;
}
.tf-faq-item[open] summary::after{content:"\2212";}
.tf-faq-item p{
  padding:0 0 18px;
  font-size:14.5px;
  line-height:1.9;
  color:var(--muted);
}

/* ---------- form ---------- */
.tf-form-wrap{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);
  gap:0;
  border-radius:var(--radius-l);
  overflow:hidden;
  box-shadow:var(--shadow);
  border:1px solid var(--line);
  background:#fff;
}
.tf-form-side{
  background:linear-gradient(165deg,#0b3b39 0%,#0f4a46 100%);
  color:#e9f4f0;
  padding:clamp(26px,4vw,40px);
  min-width:0;
}
.tf-form-side h2{
  font-size:clamp(19px,2.3vw,25px);
  font-weight:800;
  color:#fff;
  line-height:1.45;
}
.tf-form-side p{
  margin-top:14px;
  font-size:14.5px;
  line-height:1.9;
  color:#c6ddd6;
}
.tf-form-side ul{margin-top:20px;display:grid;gap:10px;}
.tf-form-side li{
  display:flex;
  gap:10px;
  font-size:14px;
  color:#dcece7;
  line-height:1.7;
}
.tf-form-side li i{color:var(--accent);margin-top:4px;font-size:13px;}
.tf-form{
  padding:clamp(26px,4vw,40px);
  display:grid;
  gap:14px;
  min-width:0;
}
.tf-field{display:grid;gap:6px;min-width:0;}
.tf-field label{font-size:13.5px;font-weight:700;color:#2c4a46;}
.tf-input,.tf-textarea{
  width:100%;
  padding:11px 14px;
  border:1px solid var(--line);
  border-radius:10px;
  font-size:14.5px;
  font-family:inherit;
  color:var(--ink);
  background:#fbfdfc;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.tf-input:focus,.tf-textarea:focus{
  outline:none;
  border-color:var(--deep-3);
  background:#fff;
  box-shadow:0 0 0 3px rgba(15,74,70,.12);
}
.tf-textarea{min-height:96px;resize:vertical;}
.tf-form-note{font-size:12.5px;line-height:1.8;color:var(--muted);}

/* ---------- risk ---------- */
.tf-risk{
  background:#fff8ee;
  border:1px solid #f2ddbf;
  border-radius:var(--radius);
  padding:20px 22px;
  display:flex;
  gap:14px;
  min-width:0;
}
.tf-risk i{
  flex:0 0 auto;
  color:var(--accent-dark);
  font-size:18px;
  margin-top:3px;
}
.tf-risk p{
  font-size:14px;
  line-height:1.9;
  color:#7a5a2e;
  min-width:0;
}

/* ---------- footer ---------- */
.tf-footer{
  background:#072726;
  color:#a9c6be;
  padding:clamp(40px,5vw,64px) 0 26px;
  margin-top:0;
}
.tf-footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,1fr) minmax(0,1fr);
  gap:32px;
  padding-bottom:30px;
  border-bottom:1px solid rgba(255,255,255,.10);
}
.tf-footer-brand{
  display:flex;
  align-items:center;
  gap:11px;
  margin-bottom:14px;
}
.tf-footer-brand .tf-logo-mark{
  width:38px;height:38px;flex:0 0 38px;
  font-size:18px;
  background:linear-gradient(150deg,#0f4a46,#17605a);
  box-shadow:none;
}
.tf-footer-brand strong{font-size:16px;color:#fff;letter-spacing:.5px;}
.tf-footer p{font-size:13.5px;line-height:1.9;color:#8fb3aa;}
.tf-footer-col h3{
  font-size:14px;
  font-weight:800;
  color:#fff;
  margin-bottom:14px;
  letter-spacing:.6px;
}
.tf-footer-col a{
  display:block;
  font-size:13.5px;
  color:#a9c6be;
  padding:6px 0;
}
.tf-footer-col a:hover{color:var(--accent);}
.tf-footer-bottom{
  padding-top:20px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  font-size:12.5px;
  color:#7ea49a;
}
.tf-footer-bottom a{color:#7ea49a;}
.tf-footer-bottom a:hover{color:var(--accent);}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .tf-hero-grid{grid-template-columns:minmax(0,1fr);gap:32px;}
  .tf-hero-panel{max-width:520px;}
  .tf-dl-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .tf-metrics{grid-template-columns:repeat(2,minmax(0,1fr));}
  .tf-grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
  .tf-flow{grid-template-columns:repeat(3,minmax(0,1fr));}
  .tf-news-grid{grid-template-columns:minmax(0,1fr);}
  .tf-post-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .tf-guard-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .tf-form-wrap{grid-template-columns:minmax(0,1fr);}
  .tf-footer-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);}
}
@media (max-width:860px){
  .tf-nav-toggle{display:inline-flex;}
  .tf-nav{
    display:none;
    position:absolute;
    top:100%;left:0;right:0;
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    margin:0;
    padding:10px 16px 16px;
    background:#fff;
    border-bottom:1px solid var(--line);
    box-shadow:0 18px 32px rgba(11,59,57,.12);
  }
  .tf-nav.is-open{display:flex;}
  .tf-nav a{padding:12px 14px;border-radius:10px;font-size:15px;}
  .tf-nav-actions{display:none;}
  .tf-nav-wrap{min-height:66px;gap:14px;}
  .tf-hero-points{grid-template-columns:minmax(0,1fr);}
}
@media (max-width:768px){
  .tf-grid-2,.tf-compare,.tf-audience{grid-template-columns:minmax(0,1fr);}
  .tf-flow{grid-template-columns:repeat(2,minmax(0,1fr));}
  .tf-param-list{grid-template-columns:repeat(2,minmax(0,1fr));}
  .tf-topic-inner{flex-direction:column;align-items:flex-start;}
  .tf-footer-grid{grid-template-columns:minmax(0,1fr);gap:24px;}
}
@media (max-width:520px){
  .tf-container{padding:0 16px;}
  .tf-logo-text{font-size:15px;}
  .tf-logo-sub{letter-spacing:1.4px;}
  .tf-dl-grid{grid-template-columns:minmax(0,1fr);}
  .tf-metrics{grid-template-columns:minmax(0,1fr);}
  .tf-grid-3,.tf-post-grid,.tf-guard-grid,.tf-flow{grid-template-columns:minmax(0,1fr);}
  .tf-hero-cta .tf-btn{width:100%;}
  .tf-ring{width:150px;height:150px;}
  .tf-ring-inner{width:112px;height:112px;}
  .tf-panel,.tf-card,.tf-dl-card,.tf-post{padding:20px 18px;}
  .tf-risk{flex-direction:row;padding:18px;}
  .tf-faq-item{padding:4px 16px;}
}

/* roulang page: article */
:root{
  --deep:#0b3b39;
  --deep-2:#082e2d;
  --deep-3:#0f4a46;
  --ink:#142a28;
  --muted:#5c716e;
  --line:#e0eae6;
  --bg:#f5f9f7;
  --card:#ffffff;
  --accent:#e58b3c;
  --accent-dark:#c9701f;
  --mint:#e8f4ef;
  --radius-s:10px;
  --radius:16px;
  --radius-l:24px;
  --shadow-s:0 4px 14px rgba(11,59,57,.06);
  --shadow:0 14px 34px rgba(11,59,57,.10);
  --shadow-l:0 26px 60px rgba(11,59,57,.16);
  --sp:clamp(48px,7vw,88px);
}
*,*::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",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--deep-3);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--accent-dark);}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
.tf-container{
  width:100%;
  max-width:1180px;
  margin:0 auto;
  padding:0 22px;
}
/* ---------- header ---------- */
.tf-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.tf-nav-wrap{
  position:relative;
  display:flex;
  align-items:center;
  gap:26px;
  min-height:72px;
}
.tf-logo{
  display:inline-flex;
  align-items:center;
  gap:11px;
  flex:0 0 auto;
  min-width:0;
}
.tf-logo-mark{
  width:42px;height:42px;
  flex:0 0 42px;
  border-radius:12px;
  background:linear-gradient(150deg,var(--deep) 0%,var(--deep-3) 55%,#17605a 100%);
  color:#fff;
  font-size:20px;
  font-weight:700;
  display:grid;
  place-items:center;
  box-shadow:0 8px 18px rgba(11,59,57,.24);
}
.tf-logo-text{
  display:flex;
  flex-direction:column;
  line-height:1.15;
  font-size:17px;
  font-weight:800;
  letter-spacing:.4px;
  color:var(--deep);
  white-space:nowrap;
}
.tf-logo-sub{
  font-size:11px;
  font-weight:500;
  letter-spacing:2px;
  color:var(--muted);
}
.tf-nav{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:12px;
  flex:1 1 auto;
  min-width:0;
}
.tf-nav a{
  padding:9px 14px;
  border-radius:999px;
  font-size:15px;
  color:#3d5350;
  white-space:nowrap;
  transition:background .2s ease,color .2s ease;
}
.tf-nav a:hover{background:var(--mint);color:var(--deep);}
.tf-nav a.is-active{background:var(--deep);color:#fff;}
.tf-nav-actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.tf-nav-toggle{
  display:none;
  width:42px;height:42px;
  border:1px solid var(--line);
  border-radius:12px;
  background:#fff;
  color:var(--deep);
  font-size:17px;
  cursor:pointer;
  align-items:center;
  justify-content:center;
}
/* ---------- buttons ---------- */
.tf-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 22px;
  border-radius:999px;
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
  text-align:center;
}
.tf-btn-primary{
  background:var(--accent);
  color:#2a1704;
  box-shadow:0 10px 22px rgba(229,139,60,.32);
}
.tf-btn-primary:hover{background:#ef9a4d;color:#20120a;transform:translateY(-2px);box-shadow:0 14px 28px rgba(229,139,60,.38);}
.tf-btn-primary:active{transform:translateY(0);}
.tf-btn-ghost{
  background:#fff;
  color:var(--deep);
  border-color:var(--line);
}
.tf-btn-ghost:hover{border-color:var(--deep);color:var(--deep);transform:translateY(-2px);}
.tf-btn-line{
  background:transparent;
  color:#eaf5f0;
  border-color:rgba(255,255,255,.4);
}
.tf-btn-line:hover{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.75);}
.tf-btn-block{width:100%;}
/* ---------- article hero ---------- */
.tf-article-hero{
  background:radial-gradient(900px 420px at 88% -20%,#17605a 0%,rgba(23,96,90,0) 62%),
             linear-gradient(165deg,var(--deep) 0%,var(--deep-2) 60%,#062827 100%);
  color:#e9f4f0;
  padding:clamp(34px,5vw,58px) 0 clamp(36px,5vw,58px);
}
.tf-crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:#9fc2b9;
}
.tf-crumb a{color:#cfe6df;}
.tf-crumb a:hover{color:#fff;}
.tf-crumb span.sep{opacity:.55;}
.tf-article-hero h1{
  margin-top:16px;
  font-size:clamp(24px,3.2vw,36px);
  line-height:1.38;
  font-weight:800;
  letter-spacing:.3px;
  color:#fff;
  max-width:900px;
}
.tf-article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 14px;
  margin-top:18px;
}
.tf-tag{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:5px 13px;
  border-radius:999px;
  background:rgba(255,255,255,.10);
  border:1px solid rgba(255,255,255,.22);
  font-size:13px;
  color:#dcedE7;
}
.tf-tag i{color:var(--accent);}
.tf-meta-item{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-size:13px;
  color:#a8c8c0;
}
.tf-article-lead{
  margin-top:18px;
  max-width:820px;
  font-size:15.5px;
  line-height:1.85;
  color:#c6ddd6;
}
/* ---------- generic section ---------- */
.tf-section{padding:var(--sp) 0;}
.tf-section.is-alt{background:#eef5f1;}
.tf-section.is-white{background:#fff;}
.tf-sec-head{max-width:780px;margin-bottom:34px;}
.tf-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:600;
  letter-spacing:1.4px;
  color:var(--accent-dark);
  text-transform:uppercase;
}
.tf-sec-head h2{
  margin-top:10px;
  font-size:clamp(21px,2.6vw,29px);
  line-height:1.45;
  font-weight:800;
  color:var(--deep);
}
.tf-sec-head p{
  margin-top:12px;
  color:var(--muted);
  font-size:15.5px;
  line-height:1.85;
}
/* ---------- article layout ---------- */
.tf-article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 320px;
  gap:32px;
  align-items:start;
}
.tf-prose{
  min-width:0;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-l);
  padding:clamp(20px,3vw,40px);
  box-shadow:var(--shadow-s);
  color:#2c4340;
}
.tf-prose h2{
  font-size:clamp(19px,2.2vw,22px);
  line-height:1.5;
  color:var(--deep);
  margin:30px 0 14px;
  padding-left:12px;
  border-left:4px solid var(--accent);
}
.tf-prose h2:first-child{margin-top:0;}
.tf-prose h3{
  font-size:17px;
  line-height:1.55;
  color:var(--deep-3);
  margin:22px 0 10px;
}
.tf-prose h4{font-size:16px;color:var(--deep-3);margin:18px 0 8px;}
.tf-prose p{margin:0 0 16px;line-height:1.9;}
.tf-prose ul,.tf-prose ol{margin:0 0 18px;padding-left:22px;list-style:disc;}
.tf-prose ol{list-style:decimal;}
.tf-prose li{margin-bottom:8px;line-height:1.85;}
.tf-prose strong{color:var(--deep);}
.tf-prose a{color:var(--deep-3);text-decoration:underline;text-underline-offset:3px;}
.tf-prose img{
  max-width:100%;
  height:auto;
  border-radius:var(--radius);
  margin:18px auto;
}
.tf-prose blockquote{
  margin:18px 0;
  padding:14px 18px;
  background:#fdf7f1;
  border-left:3px solid var(--accent);
  border-radius:0 12px 12px 0;
  color:#51655f;
}
.tf-prose table{
  width:100%;
  border-collapse:collapse;
  margin:18px 0;
  font-size:15px;
  display:block;
  overflow-x:auto;
}
.tf-prose th,.tf-prose td{
  border:1px solid var(--line);
  padding:10px 12px;
  text-align:left;
  vertical-align:top;
}
.tf-prose th{background:var(--mint);color:var(--deep);font-weight:700;}
.tf-empty{
  background:var(--card);
  border:1px dashed var(--line);
  border-radius:var(--radius-l);
  padding:clamp(28px,4vw,52px);
  text-align:center;
  box-shadow:var(--shadow-s);
}
.tf-empty h2{font-size:21px;color:var(--deep);margin-bottom:12px;}
.tf-empty p{color:var(--muted);margin-bottom:22px;}
/* ---------- side ---------- */
.tf-article-side{
  display:grid;
  gap:18px;
  min-width:0;
  position:sticky;
  top:92px;
}
.tf-side-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:20px;
  box-shadow:var(--shadow-s);
  min-width:0;
}
.tf-side-card h3{
  font-size:15px;
  font-weight:800;
  color:var(--deep);
  margin-bottom:14px;
  letter-spacing:.4px;
}
.tf-side-list li{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:12px;
  padding:9px 0;
  border-bottom:1px dashed var(--line);
  font-size:14px;
  color:var(--muted);
}
.tf-side-list li:last-child{border-bottom:none;padding-bottom:0;}
.tf-side-list li b{color:var(--deep);font-weight:700;}
.tf-side-dl{display:grid;gap:10px;}
.tf-side-dl a{
  display:flex;
  align-items:center;
  gap:10px;
  padding:10px 13px;
  border:1px solid var(--line);
  border-radius:12px;
  font-size:14px;
  font-weight:600;
  color:var(--deep);
  background:#fbfdfc;
  transition:border-color .2s ease,background .2s ease,transform .2s ease;
}
.tf-side-dl a:hover{border-color:var(--deep);background:var(--mint);transform:translateX(2px);}
.tf-side-dl i{color:var(--accent-dark);width:16px;text-align:center;}
.tf-side-note{
  font-size:13px;
  line-height:1.75;
  color:#7a6a58;
  background:#fdf7f1;
  border:1px solid #f0dcc9;
  border-radius:var(--radius);
  padding:16px 18px;
}
.tf-side-note strong{display:block;color:var(--accent-dark);margin-bottom:6px;font-size:14px;}
/* ---------- grids & cards ---------- */
.tf-grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;}
.tf-grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;}
.tf-info-card{
  min-width:0;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:22px 20px;
  box-shadow:var(--shadow-s);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.tf-info-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#c8ded6;}
.tf-info-card .tf-icon{
  width:42px;height:42px;
  border-radius:12px;
  display:grid;
  place-items:center;
  background:var(--mint);
  color:var(--deep);
  font-size:17px;
  margin-bottom:14px;
}
.tf-info-card h3{font-size:16px;color:var(--deep);margin-bottom:8px;}
.tf-info-card p{font-size:14px;line-height:1.8;color:var(--muted);}
/* ---------- compare ---------- */
.tf-compare{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}
.tf-compare-col{
  min-width:0;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-l);
  padding:26px 24px;
  box-shadow:var(--shadow-s);
}
.tf-compare-col.is-bad{border-color:#f0d3c4;background:#fff9f5;}
.tf-compare-col.is-good{border-color:#c2ded4;background:#f7fcf9;}
.tf-compare-col h3{
  font-size:16px;
  margin-bottom:16px;
  display:flex;
  align-items:center;
  gap:9px;
  color:var(--deep);
}
.tf-compare-col.is-bad h3{color:#a9531f;}
.tf-compare-col p.desc{font-size:14px;color:var(--muted);margin-bottom:14px;}
.tf-compare-col li{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:14.5px;
  line-height:1.75;
  color:#3c5450;
  padding:8px 0;
  border-bottom:1px dashed rgba(11,59,57,.10);
}
.tf-compare-col li:last-child{border-bottom:none;}
.tf-compare-col li i{margin-top:5px;font-size:13px;}
.tf-compare-col.is-bad li i{color:#d07840;}
.tf-compare-col.is-good li i{color:#2f8b6f;}
/* ---------- download ---------- */
.tf-download-sec{
  background:linear-gradient(160deg,var(--deep) 0%,var(--deep-2) 70%,#062827 100%);
  color:#e9f4f0;
  border-radius:var(--radius-l);
  padding:clamp(30px,4.5vw,52px);
  box-shadow:var(--shadow-l);
}
.tf-download-sec .tf-eyebrow{color:var(--accent);}
.tf-download-sec h2{
  color:#fff;
  font-size:clamp(21px,2.8vw,30px);
  margin-top:10px;
  line-height:1.45;
}
.tf-download-sec p.lead{
  color:#bcd6ce;
  margin-top:12px;
  max-width:720px;
  font-size:15.5px;
  line-height:1.85;
}
.tf-dl-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:18px;
  margin-top:28px;
}
.tf-dl-card{
  min-width:0;
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.18);
  border-radius:var(--radius);
  padding:24px 20px;
  display:flex;
  flex-direction:column;
  gap:12px;
  transition:background .2s ease,transform .2s ease,border-color .2s ease;
}
.tf-dl-card:hover{background:rgba(255,255,255,.13);transform:translateY(-3px);border-color:rgba(229,139,60,.55);}
.tf-dl-card .tf-dl-icon{
  width:44px;height:44px;
  border-radius:12px;
  background:rgba(229,139,60,.18);
  color:var(--accent);
  display:grid;place-items:center;
  font-size:19px;
}
.tf-dl-card h3{font-size:16px;color:#fff;}
.tf-dl-card p{font-size:13.5px;color:#a8c8c0;line-height:1.75;flex:1 1 auto;}
.tf-dl-card .tf-btn{width:100%;}
/* ---------- faq ---------- */
.tf-faq{display:grid;gap:14px;max-width:920px;margin:0 auto;}
.tf-faq details{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:16px 20px;
  box-shadow:var(--shadow-s);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.tf-faq details[open]{border-color:#c8ded6;box-shadow:var(--shadow);}
.tf-faq summary{
  cursor:pointer;
  list-style:none;
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:14px;
  font-size:15.5px;
  font-weight:700;
  color:var(--deep);
  line-height:1.65;
}
.tf-faq summary::-webkit-details-marker{display:none;}
.tf-faq summary::after{
  content:"\002B";
  flex:0 0 auto;
  color:var(--accent-dark);
  font-weight:700;
  font-size:18px;
  line-height:1;
  margin-top:4px;
}
.tf-faq details[open] summary::after{content:"\2212";}
.tf-faq .tf-faq-body{
  margin-top:12px;
  font-size:14.5px;
  line-height:1.85;
  color:var(--muted);
}
/* ---------- category entry ---------- */
.tf-entry{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto;
  gap:22px;
  align-items:center;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-l);
  padding:clamp(24px,3.5vw,38px);
  box-shadow:var(--shadow-s);
}
.tf-entry h2{font-size:clamp(19px,2.4vw,24px);color:var(--deep);line-height:1.5;}
.tf-entry p{margin-top:10px;color:var(--muted);font-size:15px;line-height:1.85;max-width:720px;}
.tf-entry .tf-entry-actions{display:flex;gap:12px;flex-wrap:wrap;}
/* ---------- lead cta ---------- */
.tf-lead{
  background:linear-gradient(150deg,#0f4a46 0%,#0b3b39 60%,#082e2d 100%);
  border-radius:var(--radius-l);
  padding:clamp(28px,4vw,48px);
  color:#e9f4f0;
  display:grid;
  grid-template-columns:minmax(0,1.4fr) minmax(0,.6fr);
  gap:26px;
  align-items:center;
  box-shadow:var(--shadow-l);
}
.tf-lead h2{font-size:clamp(20px,2.6vw,28px);color:#fff;line-height:1.5;}
.tf-lead p{margin-top:12px;color:#bcd6ce;font-size:15px;line-height:1.85;max-width:660px;}
.tf-lead-actions{display:flex;flex-direction:column;gap:12px;}
/* ---------- footer ---------- */
.tf-footer{
  background:#062827;
  color:#a8c8c0;
  padding:clamp(40px,6vw,64px) 0 26px;
  margin-top:0;
}
.tf-footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.6fr) minmax(0,1fr) minmax(0,1fr);
  gap:32px;
  padding-bottom:30px;
  border-bottom:1px solid rgba(255,255,255,.10);
}
.tf-footer-brand{
  display:flex;
  align-items:center;
  gap:11px;
  margin-bottom:14px;
}
.tf-footer-brand strong{color:#fff;font-size:16px;letter-spacing:.4px;}
.tf-footer p{font-size:14px;line-height:1.85;color:#8fb3aa;max-width:520px;}
.tf-footer-col h3{
  font-size:14px;
  color:#fff;
  margin-bottom:14px;
  letter-spacing:.6px;
}
.tf-footer-col a{
  display:block;
  font-size:14px;
  color:#9dc0b7;
  padding:5px 0;
  transition:color .2s ease,transform .2s ease;
}
.tf-footer-col a:hover{color:var(--accent);transform:translateX(3px);}
.tf-footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px;
  padding-top:22px;
  font-size:13px;
  color:#7fa399;
}
/* ---------- responsive ---------- */
@media (max-width:1024px){
  .tf-article-layout{grid-template-columns:minmax(0,1fr);}
  .tf-article-side{position:static;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
  .tf-article-side .tf-side-note{grid-column:1 / -1;}
  .tf-grid-4{grid-template-columns:repeat(2,minmax(0,1fr));}
  .tf-lead{grid-template-columns:minmax(0,1fr);}
  .tf-lead-actions{flex-direction:row;flex-wrap:wrap;}
  .tf-entry{grid-template-columns:minmax(0,1fr);}
  .tf-footer-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);}
  .tf-footer-grid > div:first-child{grid-column:1 / -1;}
  .tf-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    margin-left:0;
    padding:12px 22px 18px;
    background:#fff;
    border-bottom:1px solid var(--line);
    box-shadow:var(--shadow);
  }
  .tf-nav.is-open{display:flex;}
  .tf-nav a{padding:11px 14px;border-radius:12px;}
  .tf-nav-actions{display:none;}
  .tf-nav-toggle{display:inline-flex;margin-left:auto;}
  .tf-logo{margin-right:auto;}
}
@media (max-width:768px){
  .tf-grid-3,.tf-dl-grid,.tf-compare{grid-template-columns:minmax(0,1fr);}
  .tf-article-side{grid-template-columns:minmax(0,1fr);}
  .tf-prose{padding:22px 18px;border-radius:var(--radius);}
  .tf-prose h2{padding-left:10px;}
  .tf-footer-grid{grid-template-columns:minmax(0,1fr);gap:24px;}
  .tf-article-hero h1{font-size:22px;}
}
@media (max-width:520px){
  .tf-container{padding:0 16px;}
  .tf-grid-4{grid-template-columns:minmax(0,1fr);}
  .tf-logo-text{font-size:15px;}
  .tf-logo-sub{letter-spacing:1px;}
  .tf-btn{padding:10px 18px;font-size:14px;}
  .tf-download-sec{padding:24px 18px;border-radius:var(--radius);}
  .tf-lead{padding:24px 18px;border-radius:var(--radius);}
  .tf-entry{padding:22px 18px;border-radius:var(--radius);}
  .tf-lead-actions{flex-direction:column;}
  .tf-lead-actions .tf-btn{width:100%;}
  .tf-footer-bottom{flex-direction:column;}
}

/* roulang page: category1 */
:root{
  --deep:#0b3b39;
  --deep-2:#082e2d;
  --deep-3:#0f4a46;
  --ink:#142a28;
  --muted:#5c716e;
  --line:#e0eae6;
  --bg:#f5f9f7;
  --card:#ffffff;
  --accent:#e58b3c;
  --accent-dark:#c9701f;
  --mint:#e8f4ef;
  --radius-s:10px;
  --radius:16px;
  --radius-l:24px;
  --shadow-s:0 4px 14px rgba(11,59,57,.06);
  --shadow:0 14px 34px rgba(11,59,57,.10);
  --shadow-l:0 26px 60px rgba(11,59,57,.16);
  --sp:clamp(48px,7vw,88px);
}
*,*::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",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--deep-3);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--accent-dark);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:800;color:var(--deep);line-height:1.35;}
p{margin:0;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;}
.tf-container{width:100%;max-width:1180px;margin:0 auto;padding:0 22px;}

/* ---------- header ---------- */
.tf-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.tf-nav-wrap{position:relative;display:flex;align-items:center;gap:26px;min-height:72px;}
.tf-logo{display:inline-flex;align-items:center;gap:11px;flex:0 0 auto;min-width:0;}
.tf-logo-mark{
  width:42px;height:42px;flex:0 0 42px;border-radius:12px;
  background:linear-gradient(150deg,var(--deep) 0%,var(--deep-3) 55%,#17605a 100%);
  color:#fff;font-size:20px;font-weight:700;display:grid;place-items:center;
  box-shadow:0 8px 18px rgba(11,59,57,.24);
}
.tf-logo-text{
  display:flex;flex-direction:column;line-height:1.15;font-size:17px;
  font-weight:800;letter-spacing:.4px;color:var(--deep);white-space:nowrap;
}
.tf-logo-sub{font-size:11px;font-weight:500;letter-spacing:2px;color:var(--muted);}
.tf-nav{display:flex;align-items:center;gap:6px;margin-left:12px;flex:1 1 auto;min-width:0;}
.tf-nav a{
  padding:9px 14px;border-radius:999px;font-size:15px;color:#3d5350;
  white-space:nowrap;transition:background .2s ease,color .2s ease;
}
.tf-nav a:hover{background:var(--mint);color:var(--deep);}
.tf-nav a.is-active{background:var(--deep);color:#fff;}
.tf-nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.tf-nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line);
  border-radius:12px;background:#fff;color:var(--deep);font-size:17px;
  cursor:pointer;align-items:center;justify-content:center;
}

/* ---------- buttons ---------- */
.tf-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:999px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;text-align:center;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.tf-btn-primary{background:var(--accent);color:#2a1704;box-shadow:0 10px 22px rgba(229,139,60,.32);}
.tf-btn-primary:hover{background:#ef9a4d;color:#20120a;transform:translateY(-2px);box-shadow:0 14px 28px rgba(229,139,60,.38);}
.tf-btn-primary:active{transform:translateY(0);}
.tf-btn-ghost{background:#fff;color:var(--deep);border-color:var(--line);}
.tf-btn-ghost:hover{border-color:var(--deep);color:var(--deep);transform:translateY(-2px);}
.tf-btn-line{background:transparent;color:#eaf5f0;border-color:rgba(255,255,255,.4);}
.tf-btn-line:hover{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.75);}
.tf-btn-block{width:100%;}

/* ---------- category hero ---------- */
.tf-cat-hero{
  position:relative;
  background:radial-gradient(1050px 460px at 84% -14%,#17605a 0%,rgba(23,96,90,0) 62%),
             linear-gradient(165deg,var(--deep) 0%,var(--deep-2) 58%,#062827 100%);
  color:#e9f4f0;
  padding:clamp(40px,5.6vw,72px) 0 clamp(44px,5.6vw,72px);
  overflow:hidden;
}
.tf-cat-hero::after{
  content:"";position:absolute;inset:auto -12% -58% -12%;height:320px;
  background:radial-gradient(closest-side,rgba(229,139,60,.20),rgba(229,139,60,0));
  pointer-events:none;
}
.tf-cat-hero-grid{
  position:relative;z-index:2;display:grid;
  grid-template-columns:minmax(0,1.28fr) minmax(0,.92fr);
  gap:clamp(26px,4vw,54px);align-items:center;
}
.tf-crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:#9fc2b9;margin-bottom:16px;}
.tf-crumb a{color:#cfe4dd;}
.tf-crumb a:hover{color:#fff;}
.tf-crumb i{font-size:10px;color:#7ba79d;}
.tf-badge{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.22);
  font-size:13px;letter-spacing:.6px;color:#d8ece5;
}
.tf-badge i{color:var(--accent);}
.tf-cat-hero h1{
  margin:18px 0 0;font-size:clamp(26px,3.5vw,40px);line-height:1.32;
  font-weight:800;letter-spacing:.4px;color:#ffffff;
}
.tf-cat-hero-lead{margin-top:18px;font-size:16px;line-height:1.85;color:#c6ddd6;max-width:620px;}
.tf-hero-points{margin-top:22px;display:grid;grid-template-columns:repeat(1,minmax(0,1fr));gap:10px;max-width:600px;}
.tf-hero-points li{display:flex;align-items:flex-start;gap:10px;font-size:15px;color:#dcece7;}
.tf-hero-points i{color:var(--accent);margin-top:4px;font-size:14px;flex:0 0 auto;}
.tf-hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.tf-panel{
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.18);
  border-radius:var(--radius-l);padding:24px 22px;box-shadow:var(--shadow-l);
  backdrop-filter:blur(4px);min-width:0;
}
.tf-panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:6px;}
.tf-panel-head strong{font-size:15px;color:#fff;letter-spacing:.5px;}
.tf-panel-head span{font-size:12px;color:#9fc2b9;}
.tf-panel-note{font-size:13px;color:#9fc2b9;line-height:1.7;margin-bottom:6px;}
.tf-param-list{margin-top:14px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;}
.tf-param-list div{
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);
  border-radius:12px;padding:11px 13px;min-width:0;
}
.tf-param-list dt{font-size:12px;color:#9fc2b9;margin-bottom:3px;}
.tf-param-list dd{margin:0;font-size:14px;font-weight:700;color:#fff;}

/* ---------- section ---------- */
.tf-section{padding:var(--sp) 0;}
.tf-section.is-alt{background:#eef5f1;}
.tf-section.is-white{background:#fff;}
.tf-sec-head{max-width:760px;margin-bottom:clamp(26px,3.4vw,42px);}
.tf-sec-head.is-center{margin-left:auto;margin-right:auto;text-align:center;}
.tf-eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;
  letter-spacing:1.6px;color:var(--accent-dark);text-transform:uppercase;margin-bottom:12px;
}
.tf-eyebrow::before{content:"";width:22px;height:2px;background:var(--accent);border-radius:2px;}
.tf-sec-head.is-center .tf-eyebrow::before{display:none;}
.tf-sec-head h2{font-size:clamp(22px,2.7vw,32px);letter-spacing:.3px;}
.tf-sec-desc{margin-top:14px;color:var(--muted);font-size:15.5px;line-height:1.85;}

/* ---------- grids ---------- */
.tf-grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
.tf-grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.tf-grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;}
.tf-grid-2 > *,.tf-grid-3 > *,.tf-grid-4 > *{min-width:0;}

/* ---------- metric board ---------- */
.tf-metric{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 20px;box-shadow:var(--shadow-s);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  display:flex;flex-direction:column;gap:8px;
}
.tf-metric:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#cfe2da;}
.tf-metric-top{display:flex;align-items:center;gap:10px;}
.tf-metric-ico{
  width:38px;height:38px;flex:0 0 38px;border-radius:11px;display:grid;place-items:center;
  background:var(--mint);color:var(--deep-3);font-size:15px;
}
.tf-metric h3{font-size:16px;}
.tf-metric p{font-size:14.5px;color:var(--muted);line-height:1.8;}
.tf-metric .tf-kv{font-size:13px;color:var(--deep-3);font-weight:700;letter-spacing:.4px;}

/* ---------- matrix card ---------- */
.tf-matrix{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 22px;box-shadow:var(--shadow-s);height:100%;
  transition:transform .2s ease,box-shadow .2s ease;
  display:flex;flex-direction:column;
}
.tf-matrix:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
.tf-matrix h3{font-size:17px;margin-bottom:10px;}
.tf-matrix p{font-size:14.5px;color:var(--muted);line-height:1.8;}
.tf-matrix ul{margin-top:14px;display:grid;gap:8px;}
.tf-matrix li{display:flex;gap:9px;font-size:14px;color:#33514d;line-height:1.7;}
.tf-matrix li i{color:var(--accent);font-size:12px;margin-top:6px;flex:0 0 auto;}
.tf-tag{
  display:inline-block;padding:4px 11px;border-radius:999px;background:var(--mint);
  color:var(--deep-3);font-size:12.5px;font-weight:600;letter-spacing:.3px;
}

/* ---------- compare card ---------- */
.tf-compare{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 22px;box-shadow:var(--shadow-s);height:100%;display:flex;flex-direction:column;gap:14px;
}
.tf-compare.is-hot{border-color:rgba(229,139,60,.5);box-shadow:0 16px 36px rgba(229,139,60,.16);}
.tf-compare-head{display:flex;align-items:center;justify-content:space-between;gap:10px;}
.tf-compare-head strong{font-size:18px;color:var(--deep);letter-spacing:.3px;}
.tf-compare-rows{display:grid;gap:0;border-top:1px dashed var(--line);}
.tf-compare-rows div{
  display:flex;align-items:baseline;justify-content:space-between;gap:12px;
  padding:10px 0;border-bottom:1px dashed var(--line);font-size:14.5px;
}
.tf-compare-rows span{color:var(--muted);flex:0 0 auto;}
.tf-compare-rows b{color:var(--deep);font-weight:700;text-align:right;}
.tf-compare-rows b.up{color:#1f7a5c;}
.tf-compare-rows b.down{color:#b5541f;}
.tf-note{
  margin-top:18px;padding:14px 18px;border-radius:var(--radius-s);
  background:#fdf3e8;border:1px solid #f3ddc4;color:#7a4a15;font-size:14px;line-height:1.8;
}
.tf-note i{margin-right:6px;}

/* ---------- steps ---------- */
.tf-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;}
.tf-step{
  position:relative;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);padding:22px 20px 20px;box-shadow:var(--shadow-s);
  transition:transform .2s ease,box-shadow .2s ease;
}
.tf-step:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
.tf-step-num{
  display:inline-grid;place-items:center;width:34px;height:34px;border-radius:10px;
  background:var(--deep);color:#fff;font-size:14px;font-weight:700;margin-bottom:12px;
}
.tf-step h3{font-size:16px;margin-bottom:8px;}
.tf-step p{font-size:14.5px;color:var(--muted);line-height:1.8;}

/* ---------- download ---------- */
.tf-download{
  background:linear-gradient(150deg,var(--deep) 0%,var(--deep-2) 62%,#062827 100%);
  border-radius:var(--radius-l);padding:clamp(26px,4vw,46px);color:#e6f2ee;
  box-shadow:var(--shadow-l);position:relative;overflow:hidden;
}
.tf-download::after{
  content:"";position:absolute;right:-8%;top:-40%;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(closest-side,rgba(229,139,60,.24),rgba(229,139,60,0));
  pointer-events:none;
}
.tf-download-grid{
  position:relative;z-index:2;display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);
  gap:clamp(24px,4vw,44px);align-items:center;
}
.tf-download h2{color:#fff;font-size:clamp(21px,2.6vw,29px);}
.tf-download p{margin-top:12px;color:#bcd6ce;font-size:15px;line-height:1.85;}
.tf-download-btns{display:grid;grid-template-columns:repeat(1,minmax(0,1fr));gap:12px;}
.tf-dl-btn{
  display:flex;align-items:center;gap:14px;padding:15px 18px;border-radius:var(--radius);
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.20);color:#fff;
  transition:background .2s ease,transform .2s ease,border-color .2s ease;
}
.tf-dl-btn:hover{background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.42);color:#fff;transform:translateY(-2px);}
.tf-dl-btn i{font-size:20px;color:var(--accent);flex:0 0 auto;}
.tf-dl-btn strong{display:block;font-size:15.5px;letter-spacing:.4px;}
.tf-dl-btn small{display:block;font-size:12.5px;color:#a8c8bf;}
.tf-dl-arrow{margin-left:auto;font-size:13px;color:#a8c8bf;}

/* ---------- posts ---------- */
.tf-post-card{
  display:flex;flex-direction:column;gap:10px;height:100%;
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 20px;box-shadow:var(--shadow-s);color:inherit;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.tf-post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#cfe2da;color:inherit;}
.tf-post-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:12.5px;color:var(--muted);}
.tf-post-card h3{font-size:16.5px;line-height:1.55;color:var(--deep);}
.tf-post-card p{font-size:14px;color:var(--muted);line-height:1.8;}
.tf-post-more{margin-top:auto;font-size:13.5px;font-weight:600;color:var(--accent-dark);display:inline-flex;align-items:center;gap:6px;}
.tf-empty{
  padding:34px 22px;border-radius:var(--radius);background:#fff;border:1px dashed var(--line);
  text-align:center;color:var(--muted);font-size:15px;
}

/* ---------- safety ---------- */
.tf-safety{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;}
.tf-safety-item{
  display:flex;gap:15px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);padding:22px 20px;box-shadow:var(--shadow-s);
  transition:transform .2s ease,box-shadow .2s ease;min-width:0;
}
.tf-safety-item:hover{transform:translateY(-3px);box-shadow:var(--shadow);}
.tf-safety-ico{
  width:44px;height:44px;flex:0 0 44px;border-radius:13px;display:grid;place-items:center;
  background:linear-gradient(150deg,var(--deep) 0%,var(--deep-3) 100%);color:#fff;font-size:16px;
}
.tf-safety-item h3{font-size:16px;margin-bottom:6px;}
.tf-safety-item p{font-size:14.5px;color:var(--muted);line-height:1.8;}

/* ---------- faq ---------- */
.tf-faq{display:grid;gap:12px;max-width:900px;margin:0 auto;}
.tf-faq-item{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:6px 20px;box-shadow:var(--shadow-s);transition:border-color .2s ease,box-shadow .2s ease;
}
.tf-faq-item[open]{border-color:#cfe2da;box-shadow:var(--shadow);}
.tf-faq-item summary{
  list-style:none;cursor:pointer;padding:15px 0;font-size:16px;font-weight:700;color:var(--deep);
  display:flex;align-items:center;gap:12px;
}
.tf-faq-item summary::-webkit-details-marker{display:none;}
.tf-faq-item summary::after{
  content:"\f078";font-family:"Font Awesome 6 Free";font-weight:900;font-size:12px;
  margin-left:auto;color:var(--muted);transition:transform .2s ease;
}
.tf-faq-item[open] summary::after{transform:rotate(180deg);}
.tf-faq-item p{padding:0 0 16px;font-size:14.8px;color:var(--muted);line-height:1.85;}

/* ---------- lead form ---------- */
.tf-lead{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.92fr);
  gap:clamp(24px,4vw,48px);align-items:start;
}
.tf-lead-info h2{font-size:clamp(21px,2.6vw,30px);}
.tf-lead-info p{margin-top:14px;color:var(--muted);font-size:15.5px;line-height:1.85;}
.tf-lead-list{margin-top:22px;display:grid;gap:10px;}
.tf-lead-list li{display:flex;gap:10px;font-size:14.8px;color:#33514d;line-height:1.75;}
.tf-lead-list i{color:var(--accent);margin-top:5px;font-size:12px;flex:0 0 auto;}
.tf-form{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-l);
  padding:clamp(22px,3vw,32px);box-shadow:var(--shadow);
}
.tf-field{display:grid;gap:7px;margin-bottom:16px;}
.tf-field label{font-size:14px;font-weight:600;color:var(--deep);}
.tf-field input,.tf-field select,.tf-field textarea{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:var(--radius-s);
  background:#fbfdfc;font-size:15px;color:var(--ink);font-family:inherit;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.tf-field input:focus,.tf-field select:focus,.tf-field textarea:focus{
  outline:none;border-color:var(--deep-3);background:#fff;box-shadow:0 0 0 3px rgba(15,74,70,.10);
}
.tf-field textarea{resize:vertical;min-height:88px;}
.tf-form-tip{font-size:12.8px;color:var(--muted);line-height:1.7;margin-top:12px;}
.tf-form-msg{
  display:none;margin-top:14px;padding:11px 14px;border-radius:var(--radius-s);
  background:var(--mint);border:1px solid #cbe3d8;color:var(--deep-3);font-size:14px;
}
.tf-form-msg.is-show{display:block;}

/* ---------- footer ---------- */
.tf-footer{background:var(--deep-2);color:#b9d2cb;padding:clamp(40px,5vw,64px) 0 26px;margin-top:0;}
.tf-footer-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr) minmax(0,1fr);gap:clamp(24px,4vw,48px);}
.tf-footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:14px;}
.tf-footer-brand strong{color:#fff;font-size:16px;letter-spacing:.4px;}
.tf-footer p{font-size:14px;line-height:1.85;color:#9fbfb7;max-width:460px;}
.tf-footer-col h3{color:#fff;font-size:15px;margin-bottom:14px;letter-spacing:.5px;}
.tf-footer-col a{display:block;font-size:14px;color:#a9c7c0;padding:5px 0;transition:color .2s ease,transform .2s ease;}
.tf-footer-col a:hover{color:#fff;transform:translateX(3px);}
.tf-footer-bottom{
  margin-top:clamp(26px,4vw,40px);padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:#8fb0a8;
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .tf-cat-hero-grid{grid-template-columns:minmax(0,1fr);}
  .tf-grid-4{grid-template-columns:repeat(2,minmax(0,1fr));}
  .tf-grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
  .tf-steps{grid-template-columns:repeat(2,minmax(0,1fr));}
  .tf-download-grid{grid-template-columns:minmax(0,1fr);}
  .tf-lead{grid-template-columns:minmax(0,1fr);}
  .tf-footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .tf-footer-grid > div:first-child{grid-column:1 / -1;}
  .tf-nav-actions{display:none;}
  .tf-nav-toggle{display:inline-flex;margin-left:auto;}
  .tf-nav{
    display:none;position:absolute;top:100%;left:0;right:0;margin:0;
    background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow);
    padding:12px 18px 18px;flex-direction:column;align-items:stretch;gap:4px;z-index:70;
  }
  .tf-nav.is-open{display:flex;}
  .tf-nav a{padding:12px 14px;border-radius:var(--radius-s);font-size:15.5px;}
}
@media (max-width:768px){
  body{font-size:15.5px;}
  .tf-grid-2,.tf-grid-3,.tf-grid-4,.tf-steps,.tf-safety{grid-template-columns:minmax(0,1fr);}
  .tf-param-list{grid-template-columns:repeat(2,minmax(0,1fr));}
  .tf-hero-cta .tf-btn{flex:1 1 100%;}
  .tf-sec-head{margin-bottom:24px;}
}
@media (max-width:520px){
  .tf-container{padding:0 16px;}
  .tf-logo-text{font-size:15.5px;}
  .tf-logo-sub{font-size:10px;letter-spacing:1.4px;}
  .tf-logo-mark{width:38px;height:38px;flex:0 0 38px;font-size:18px;}
  .tf-param-list{grid-template-columns:minmax(0,1fr);}
  .tf-dl-btn{padding:13px 14px;}
  .tf-faq-item{padding:4px 16px;}
  .tf-footer-bottom{flex-direction:column;align-items:flex-start;}
}