/* roulang page: index */
:root{
  --orange:#E4572E;
  --orange-dark:#C9431F;
  --brown:#5B3520;
  --text:#3A2A1F;
  --muted:#7A6656;
  --cream:#FFF7EC;
  --cream-2:#FBEBD7;
  --line:#E8D5BE;
  --green:#3E8E6E;
  --yellow:#FFC94A;
  --r-lg:20px;
  --r-md:14px;
  --r-sm:10px;
  --shadow:0 10px 30px rgba(107,63,35,.10);
  --shadow-h:0 16px 36px rgba(107,63,35,.16);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  padding-bottom:88px;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--cream);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,figure{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
a{color:inherit;text-decoration:none;}
img{display:block;max-width:100%;height:auto;}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
section[id]{scroll-margin-top:120px;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;padding:13px 28px;font-size:15px;font-weight:700;
  border:1px solid transparent;min-height:46px;
  transition:background .18s ease,color .18s ease,box-shadow .18s ease,transform .18s ease,border-color .18s ease;
}
.btn-primary{background:var(--orange);color:#fff;}
.btn-primary:hover{background:var(--orange-dark);box-shadow:0 8px 18px rgba(228,87,46,.28);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;border-color:var(--brown);color:var(--brown);}
.btn-ghost:hover{background:var(--cream-2);transform:translateY(-1px);}
.btn:focus-visible{outline:3px solid var(--yellow);outline-offset:2px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:90;
  background:rgba(255,247,236,.95);
  border-bottom:1px solid var(--line);
  backdrop-filter:saturate(140%) blur(8px);
}
.nav-bar{display:flex;align-items:center;gap:20px;height:72px;}
.brand{display:flex;align-items:center;gap:10px;flex:none;}
.brand-mark{
  position:relative;width:40px;height:40px;border-radius:12px;background:var(--orange);
  display:grid;place-items:center;flex:none;
}
.brand-mark svg{width:18px;height:18px;fill:#fff;}
.brand-mark i{
  position:absolute;right:8px;top:8px;width:5px;height:5px;border-radius:50%;
  background:var(--yellow);display:block;
}
.brand-text{font-size:19px;font-weight:800;color:var(--brown);letter-spacing:.5px;}
.nav-links{display:flex;align-items:center;gap:2px;flex:1;margin-left:6px;}
.nav-links a{
  padding:8px 13px;border-radius:999px;font-size:15px;font-weight:500;color:var(--brown);
  transition:background .18s ease,color .18s ease;white-space:nowrap;
}
.nav-links a:hover{background:var(--cream-2);color:var(--orange-dark);}
.nav-links a.active{background:var(--orange);color:#fff;font-weight:600;}
.nav-links a:focus-visible{outline:3px solid var(--yellow);outline-offset:1px;}
.loc-btn{
  display:inline-flex;align-items:center;gap:6px;min-height:44px;
  padding:8px 14px;border:1px solid var(--line);border-radius:999px;
  background:#fff;color:var(--brown);font-size:14px;font-weight:600;flex:none;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.loc-btn:hover{border-color:var(--orange);box-shadow:0 6px 16px rgba(228,87,46,.16);}
.loc-btn svg{width:16px;height:16px;fill:var(--orange);}
.loc-btn .caret{font-size:11px;color:var(--muted);}
.loc-strip{height:36px;background:var(--cream-2);border-bottom:1px solid var(--line);display:flex;align-items:center;}
.loc-strip .container{font-size:13px;color:var(--muted);}
.loc-strip a{color:var(--orange-dark);font-weight:600;}
.loc-strip a:hover{text-decoration:underline;}

/* ---------- hero ---------- */
.hero{padding:56px 0 72px;background:var(--cream);}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:1px;
  color:var(--orange-dark);background:rgba(228,87,46,.10);
  border-radius:999px;padding:4px 14px;margin-bottom:18px;
}
.hero h1{font-size:48px;line-height:1.15;font-weight:800;color:var(--brown);letter-spacing:-.5px;}
.hl{position:relative;z-index:0;color:var(--orange-dark);}
.hl::after{
  content:"";position:absolute;left:-2px;right:-2px;bottom:2px;height:12px;
  background:var(--yellow);opacity:.55;border-radius:8px;z-index:-1;
}
.hero-sub{margin-top:16px;font-size:18px;font-weight:600;color:var(--brown);}
.hero-desc{margin-top:12px;font-size:16px;color:var(--muted);max-width:70ch;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.hero-media{position:relative;padding-bottom:64px;}
.player{
  position:relative;aspect-ratio:16/10;border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--shadow);background:var(--cream-2);
}
.player img{width:100%;height:100%;object-fit:cover;}
.player-play{
  position:absolute;inset:0;margin:auto;width:64px;height:64px;border-radius:50%;
  background:rgba(228,87,46,.92);display:grid;place-items:center;
}
.player-play::after{
  content:"";width:0;height:0;margin-left:4px;
  border-left:18px solid #fff;border-top:11px solid transparent;border-bottom:11px solid transparent;
}
.player-bar{position:absolute;left:16px;right:16px;bottom:14px;height:4px;border-radius:999px;background:rgba(255,247,236,.45);}
.player-progress{display:block;width:42%;height:100%;border-radius:999px;background:var(--orange);}
.hero-thumb{
  position:absolute;width:44%;max-width:190px;aspect-ratio:16/9;
  border-radius:12px;overflow:hidden;border:3px solid #fff;
  box-shadow:var(--shadow);background:var(--cream-2);
}
.hero-thumb img{width:100%;height:100%;object-fit:cover;}
.thumb-a{left:0;bottom:0;}
.thumb-b{left:47%;bottom:-10px;}

/* ---------- section base ---------- */
.section{padding:72px 0;}
.section-alt{background:var(--cream-2);}
.sec-head{margin-bottom:32px;max-width:780px;}
.sec-head h2{font-size:32px;line-height:1.25;font-weight:800;color:var(--brown);}
.sec-head p{margin-top:12px;font-size:15px;color:var(--muted);}
h3{font-size:20px;line-height:1.4;font-weight:700;color:var(--brown);}

/* ---------- edge ---------- */
.edge-grid{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start;}
.edge-head h2{font-size:32px;line-height:1.25;font-weight:800;color:var(--brown);}
.edge-head p{margin-top:14px;font-size:15px;color:var(--muted);}
.edge-list{display:flex;flex-direction:column;gap:16px;}
.edge-item{
  display:flex;gap:18px;align-items:flex-start;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:20px 22px;box-shadow:var(--shadow);
  transition:box-shadow .18s ease,transform .18s ease;
}
.edge-item:hover{box-shadow:var(--shadow-h);transform:translateY(-2px);}
.edge-item:nth-child(2){margin-left:24px;}
.edge-num{
  font-size:26px;font-weight:800;line-height:1;color:var(--orange);
  font-variant-numeric:tabular-nums;flex:none;padding-top:4px;
}
.edge-item p{margin-top:6px;font-size:15px;color:var(--muted);}

/* ---------- steps ---------- */
.step-grid{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:center;}
.step-grid h2{font-size:32px;line-height:1.25;font-weight:800;color:var(--brown);}
.lead{margin-top:12px;font-size:15px;color:var(--muted);}
.steps{margin-top:24px;display:flex;flex-direction:column;}
.steps li{display:flex;gap:16px;padding:16px 0;border-bottom:1px dashed var(--line);}
.steps li:last-child{border-bottom:0;}
.step-no{
  font-size:26px;font-weight:800;line-height:1.2;color:var(--orange);
  font-variant-numeric:tabular-nums;flex:none;width:34px;
}
.steps p{margin-top:4px;font-size:15px;color:var(--muted);}
.step-cta{margin-top:20px;}
.step-player{aspect-ratio:16/9;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow);background:var(--cream-2);}
.step-player img{width:100%;height:100%;object-fit:cover;}

/* ---------- video grid ---------- */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.v-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-md);overflow:hidden;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.v-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-h);border-color:#DFC4A6;}
.v-card:focus-visible{outline:3px solid var(--yellow);outline-offset:2px;}
.v-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--cream-2);}
.v-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .18s ease;}
.v-card:hover .v-thumb img{transform:scale(1.03);}
.v-time{
  position:absolute;left:8px;top:8px;background:rgba(91,53,32,.86);color:#FFF7EC;
  font-size:12px;font-weight:600;padding:2px 8px;border-radius:999px;
  font-variant-numeric:tabular-nums;
}
.v-views{
  position:absolute;right:8px;bottom:8px;background:rgba(255,247,236,.95);color:var(--brown);
  font-size:12px;font-weight:600;padding:2px 8px;border-radius:999px;
  font-variant-numeric:tabular-nums;
}
.v-body{padding:14px 16px 16px;}
.v-title{
  font-size:15px;font-weight:700;line-height:1.5;color:var(--brown);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .18s ease;
}
.v-card:hover .v-title{color:var(--orange);}

/* ---------- uploads ---------- */
.up-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.up-card{
  display:flex;gap:14px;align-items:flex-start;background:#fff;
  border:1px solid var(--line);border-radius:var(--r-md);padding:12px;
  transition:transform .18s ease,box-shadow .18s ease;
}
.up-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-h);}
.up-card:hover .v-title{color:var(--orange);}
.up-thumb{position:relative;width:38%;flex:none;aspect-ratio:4/3;border-radius:var(--r-sm);overflow:hidden;background:var(--cream-2);}
.up-thumb img{width:100%;height:100%;object-fit:cover;}
.up-thumb .v-time{font-size:11px;padding:1px 7px;}
.up-body{padding-top:2px;}
.up-meta{margin-top:8px;font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums;}
.up-meta b{color:var(--orange-dark);font-weight:700;}

/* ---------- categories ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.cat-card{
  background:var(--cream-2);border:1px solid var(--line);border-left:4px solid var(--orange);
  border-radius:12px;padding:20px 22px;
  transition:background .18s ease,box-shadow .18s ease,border-color .18s ease,transform .18s ease;
}
.cat-card:hover{background:#fff;border-color:var(--orange);box-shadow:var(--shadow);transform:translateY(-2px);}
.cat-card:nth-child(2){border-left-color:var(--green);}
.cat-card:nth-child(3){border-left-color:var(--yellow);}
.cat-card:nth-child(4){border-left-color:var(--orange-dark);}
.cat-card:nth-child(5){border-left-color:var(--green);}
.cat-card:nth-child(6){border-left-color:var(--yellow);}
.cat-card h3{font-size:19px;margin-bottom:8px;}
.cat-card p{font-size:14px;color:var(--muted);line-height:1.75;}

/* ---------- rank ---------- */
.rank-list{display:grid;grid-template-rows:repeat(5,auto);grid-auto-flow:column;gap:10px 28px;}
.rank-item{
  display:flex;align-items:center;gap:14px;padding:12px 16px;border-radius:var(--r-sm);
  transition:background .18s ease;
}
.rank-item:hover{background:#fff;}
.rank-item.top{background:rgba(228,87,46,.09);}
.rank-no{
  font-size:24px;font-weight:800;line-height:1;width:44px;flex:none;
  font-variant-numeric:tabular-nums;color:transparent;
  -webkit-text-stroke:1.4px var(--orange);
}
.rank-title{flex:1;font-size:15px;font-weight:600;color:var(--brown);}
.rank-item:hover .rank-title{color:var(--orange);}
.rank-cat{
  flex:none;font-size:12px;color:var(--green);
  border:1px solid rgba(62,142,110,.35);border-radius:999px;padding:1px 9px;
}
.rank-views{
  flex:none;width:68px;text-align:right;font-size:13px;color:var(--muted);
  font-variant-numeric:tabular-nums;font-weight:600;
}

/* ---------- reviews ---------- */
.review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.review{
  background:#fff;border:1px solid var(--line);border-left:3px solid var(--orange);
  border-radius:var(--r-md);padding:18px 20px;
}
.review-top{display:flex;align-items:center;gap:10px;}
.avatar{
  width:40px;height:40px;border-radius:50%;flex:none;background:var(--cream-2);
  display:grid;place-items:center;font-weight:800;color:var(--orange);font-size:15px;
}
.review-name{font-size:14px;font-weight:700;color:var(--brown);}
.review-stars{font-size:13px;color:var(--yellow);letter-spacing:1px;}
.review-tag{
  display:inline-block;margin-top:12px;font-size:12px;color:var(--green);
  background:rgba(62,142,110,.10);border-radius:999px;padding:1px 9px;
}
.review p{margin-top:8px;font-size:15px;color:var(--text);line-height:1.75;}

/* ---------- compare table ---------- */
.cmp-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-md);background:#fff;}
table.cmp{width:100%;border-collapse:collapse;min-width:660px;}
.cmp th,.cmp td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--line);font-size:15px;}
.cmp thead th{background:var(--cream-2);color:var(--brown);font-weight:700;font-size:14px;}
.cmp td:first-child{font-weight:600;color:var(--brown);}
.cmp td:nth-child(2){color:var(--muted);}
.cmp td:nth-child(3){color:var(--orange-dark);font-weight:600;background:rgba(228,87,46,.06);}
.cmp thead th:nth-child(3){color:var(--orange-dark);background:rgba(228,87,46,.14);}
.cmp tbody tr:last-child td{border-bottom:0;}

/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.news-item{
  display:flex;gap:14px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-md);padding:12px;
  transition:transform .18s ease,box-shadow .18s ease;
}
.news-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-h);}
.news-item:hover .news-title{color:var(--orange);}
.news-thumb{width:34%;flex:none;aspect-ratio:3/2;border-radius:var(--r-sm);overflow:hidden;background:var(--cream-2);}
.news-thumb img{width:100%;height:100%;object-fit:cover;}
.news-body{display:flex;flex-direction:column;gap:8px;}
.news-title{
  font-size:15px;font-weight:700;line-height:1.5;color:var(--brown);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .18s ease;
}
.news-meta{display:flex;align-items:center;gap:10px;font-size:12px;color:var(--muted);}
.news-src{color:var(--green);background:rgba(62,142,110,.10);border-radius:999px;padding:1px 8px;}
.news-date{font-variant-numeric:tabular-nums;}

/* ---------- faq ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px;}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;}
.faq-item summary{
  list-style:none;cursor:pointer;min-height:56px;padding:16px 20px;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:16px;font-weight:700;color:var(--brown);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"+";font-size:22px;line-height:1;color:var(--orange);}
.faq-item[open] summary::after{content:"–";}
.faq-item summary:focus-visible{outline:3px solid var(--yellow);outline-offset:-3px;}
.faq-item .faq-a{padding:0 20px 18px;font-size:15px;line-height:1.8;color:var(--text);}

/* ---------- guard ---------- */
.guard{
  position:relative;background:var(--brown);color:#FFF3E3;
  border-radius:var(--r-lg);padding:40px;box-shadow:var(--shadow);
  border:2px solid rgba(255,247,236,.18);
}
.guard h2{font-size:32px;line-height:1.25;font-weight:800;color:#FFF7EC;}
.guard-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin:26px 0 30px;}
.guard-item{
  background:rgba(255,247,236,.09);border:1px solid rgba(255,247,236,.20);
  border-radius:var(--r-md);padding:18px;
}
.guard-item h3{font-size:17px;color:#FFF7EC;margin-bottom:6px;}
.guard-item p{font-size:14px;line-height:1.7;color:rgba(255,243,227,.78);}

/* ---------- sticky bar ---------- */
.sticky-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:80;height:68px;
  background:rgba(255,247,236,.96);border-top:1px solid var(--line);
  box-shadow:0 -6px 20px rgba(107,63,35,.08);
  backdrop-filter:saturate(140%) blur(8px);
  display:flex;align-items:center;
}
.sticky-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;}
.sticky-brand{display:flex;align-items:center;gap:10px;min-width:0;}
.brand-mark.sm{width:34px;height:34px;border-radius:10px;}
.brand-mark.sm svg{width:15px;height:15px;}
.brand-mark.sm i{width:4px;height:4px;right:6px;top:6px;}
.sticky-brand strong{display:block;font-size:15px;font-weight:800;color:var(--brown);line-height:1.3;}
.sticky-brand span{display:block;font-size:12px;color:var(--muted);line-height:1.3;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.sticky-actions{display:flex;align-items:center;gap:10px;flex:none;}
.pref-icon{display:none;width:18px;height:18px;fill:currentColor;}

/* ---------- footer ---------- */
.site-footer{background:var(--brown);color:#F3E2D0;padding:56px 0 24px;margin-top:72px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;}
.f-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.f-brand .brand-mark i{background:var(--yellow);}
.f-brand-text{font-size:18px;font-weight:800;color:#FFF7EC;letter-spacing:.5px;}
.f-desc{font-size:14px;line-height:1.8;color:rgba(255,247,236,.68);max-width:34ch;}
.f-title{font-size:15px;font-weight:700;color:#FFF7EC;margin-bottom:14px;}
.f-list{display:flex;flex-direction:column;gap:10px;}
.f-list a{font-size:14px;color:rgba(255,247,236,.72);transition:color .18s ease;}
.f-list a:hover{color:var(--yellow);}
.f-loc{font-size:14px;color:rgba(255,247,236,.72);line-height:1.9;}
.copyright{
  margin-top:36px;padding-top:20px;border-top:1px solid rgba(255,247,236,.15);
  font-size:13px;color:rgba(255,247,236,.55);
}

/* ---------- 1024 ---------- */
@media (max-width:1024px){
  .section{padding:52px 0;}
  .nav-bar{height:auto;flex-wrap:wrap;gap:12px;padding:10px 0;}
  .nav-links{
    order:3;flex:1 0 100%;margin:0;gap:2px;overflow-x:auto;
    -webkit-overflow-scrolling:touch;padding-bottom:2px;
  }
  .nav-links a{padding:8px 11px;font-size:14px;}
  .loc-strip{display:none;}
  .hero{padding:40px 0 56px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero h1{font-size:38px;}
  .hero-media{max-width:520px;}
  .edge-grid,.step-grid{grid-template-columns:1fr;gap:32px;}
  .video-grid{grid-template-columns:repeat(3,1fr);gap:20px;}
  .cat-grid{grid-template-columns:repeat(2,1fr);}
  .guard-grid{grid-template-columns:repeat(2,1fr);}
  .guard{padding:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}

/* ---------- 768 ---------- */
@media (max-width:768px){
  .container{padding:0 18px;}
  .section{padding:44px 0;}
  .hero{padding:32px 0 44px;}
  .hero h1{font-size:32px;}
  .hero-sub{font-size:16px;}
  .sec-head h2,.edge-head h2,.step-grid h2,.guard h2{font-size:24px;}
  .video-grid{grid-template-columns:repeat(2,1fr);gap:16px;}
  .up-grid{grid-template-columns:1fr;}
  .rank-list{grid-template-rows:auto;grid-auto-flow:row;grid-template-columns:1fr;gap:6px;}
  .review-grid,.news-grid{grid-template-columns:1fr;}
  .cmp-wrap{-webkit-overflow-scrolling:touch;}
  .cmp th:first-child,.cmp td:first-child{position:sticky;left:0;background:#fff;z-index:1;}
  .cmp thead th:first-child{background:var(--cream-2);}
  .edge-item:nth-child(2){margin-left:0;}
  .sticky-brand span{display:none;}
  .pref-text{display:none;}
  .pref-icon{display:block;}
  .site-footer{margin-top:44px;padding:40px 0 20px;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .f-desc{max-width:none;}
}

/* ---------- 520 ---------- */
@media (max-width:520px){
  body{font-size:15px;padding-bottom:82px;}
  .container{padding:0 16px;}
  .hero h1{font-size:28px;line-height:1.25;}
  .hl::after{height:9px;bottom:1px;}
  .hero-actions .btn{flex:1 1 auto;}
  .video-grid{grid-template-columns:1fr;}
  .cat-grid{grid-template-columns:1fr;}
  .guard-grid{grid-template-columns:1fr;}
  .guard{padding:24px;border-radius:16px;}
  .sticky-bar{height:60px;}
  .sticky-actions .btn{padding:10px 18px;font-size:14px;min-height:40px;}
  .rank-no{font-size:20px;width:36px;}
  .rank-views{width:60px;font-size:12px;}
  .brand-text{font-size:17px;}
  .hero-thumb{width:46%;max-width:none;}
  .thumb-b{left:50%;}
}