/* roulang page: index */
:root{
  --ink:#101713;
  --ink-soft:#2a3430;
  --muted:#68756e;
  --bg:#f5f6f3;
  --bg-alt:#ecefe9;
  --surface:#ffffff;
  --line:#e2e6e0;
  --line-strong:#cfd8d0;
  --brand:#1f6f5c;
  --brand-dark:#155a49;
  --brand-soft:#e4f1ec;
  --accent:#c2a15c;
  --dark:#0c1411;
  --dark-2:#132019;
  --radius-s:8px;
  --radius:14px;
  --radius-l:22px;
  --shadow-s:0 2px 8px rgba(16,23,19,.05);
  --shadow:0 12px 30px rgba(16,23,19,.08);
  --shadow-lg:0 24px 60px rgba(16,23,19,.16);
  --ease:.22s cubic-bezier(.4,0,.2,1);
  --container:1180px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:15.5px;
  line-height:1.78;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.25}
button{font:inherit;color:inherit}
::selection{background:var(--brand);color:#fff}
:focus-visible{outline:3px solid rgba(31,111,92,.45);outline-offset:3px;border-radius:6px}
.container{width:min(var(--container),calc(100% - 48px));margin:0 auto}

/* ---------- header dock ---------- */
.site-header{
  position:sticky;top:0;z-index:90;
  padding:16px 0 10px;
  background:linear-gradient(180deg,rgba(245,246,243,.97) 0%,rgba(245,246,243,.78) 62%,rgba(245,246,243,0) 100%);
}
.dock{
  position:relative;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:10px 12px 10px 20px;
  background:rgba(255,255,255,.88);
  backdrop-filter:blur(16px) saturate(150%);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  border:1px solid rgba(16,23,19,.08);
  border-radius:999px;
  box-shadow:0 10px 30px rgba(16,23,19,.07);
  transition:box-shadow var(--ease),transform var(--ease);
}
.site-header.is-scrolled .dock{box-shadow:0 16px 40px rgba(16,23,19,.15)}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
.brand-mark{
  width:32px;height:32px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--brand) 0%,#35937a 100%);
  color:#fff;font-size:14px;font-weight:800;letter-spacing:0;
  box-shadow:0 6px 14px rgba(31,111,92,.28);
}
.dock-nav{display:flex;align-items:center;gap:2px}
.dock-nav a{
  display:inline-flex;align-items:center;
  padding:9px 15px;border-radius:999px;
  font-size:14.5px;font-weight:500;color:var(--ink-soft);
  transition:background var(--ease),color var(--ease);
}
.dock-nav a:hover{background:var(--brand-soft);color:var(--brand-dark)}
.dock-nav a.active{background:var(--ink);color:#fff;font-weight:600}
.dock-cta{display:inline-flex;align-items:center;gap:6px}
.nav-toggle{
  display:none;align-items:center;justify-content:center;gap:5px;
  width:44px;height:44px;border-radius:999px;border:1px solid var(--line);
  background:#fff;cursor:pointer;
}
.nav-toggle span{display:block;width:16px;height:2px;background:var(--ink);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:var(--ink);border-radius:2px;transition:transform var(--ease),top var(--ease)
}
.nav-toggle span::before{top:-5px}
.nav-toggle span::after{top:5px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--radius-s);
  font-size:15px;font-weight:700;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:background var(--ease),color var(--ease),transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px rgba(31,111,92,.26)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px);box-shadow:0 14px 30px rgba(31,111,92,.34)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-dark);background:#fff;transform:translateY(-2px)}
.btn-light{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.34)}
.btn-light:hover{background:rgba(255,255,255,.2);transform:translateY(-2px)}
.btn-white{background:#fff;color:var(--ink);box-shadow:0 10px 24px rgba(0,0,0,.18)}
.btn-white:hover{transform:translateY(-2px);background:#f3f6f2}
.btn-sm{padding:9px 16px;font-size:13.5px;border-radius:var(--radius-s)}
.btn .arrow{transition:transform var(--ease)}
.btn:hover .arrow{transform:translateX(3px)}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  color:#fff;
  padding:64px 0 72px;
  background:
    linear-gradient(180deg,rgba(9,16,13,.82) 0%,rgba(9,16,13,.72) 45%,rgba(9,16,13,.9) 100%),
    url("/assets/images/backpic/back-1.webp") center/cover no-repeat;
}
.hero::after{
  content:"";position:absolute;inset:auto 0 0 0;height:120px;
  background:linear-gradient(180deg,rgba(245,246,243,0) 0%,rgba(245,246,243,.14) 100%);
  pointer-events:none;
}
.hero-series{
  display:flex;flex-wrap:wrap;align-items:center;gap:6px;
  padding:7px;border-radius:16px;
  background:rgba(255,255,255,.09);
  border:1px solid rgba(255,255,255,.16);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  width:fit-content;max-width:100%;
}
.hero-series-label{
  font-size:12px;letter-spacing:.16em;color:rgba(255,255,255,.55);
  padding:0 10px 0 8px;font-weight:600;
}
.hero-series a{
  padding:7px 15px;border-radius:999px;font-size:13.5px;font-weight:500;
  color:rgba(255,255,255,.82);
  transition:background var(--ease),color var(--ease);
}
.hero-series a:hover{background:#fff;color:var(--ink)}
.hero-body{position:relative;z-index:2;padding-top:44px;max-width:960px}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:12.5px;font-weight:700;letter-spacing:.14em;
  color:#9ad9c5;text-transform:uppercase;
}
.hero-eyebrow::before{content:"";width:26px;height:2px;background:#9ad9c5;border-radius:2px}
.hero h1{
  margin:16px 0 18px;
  font-size:clamp(32px,4.6vw,52px);
  line-height:1.18;letter-spacing:-.025em;
  color:#fff;max-width:900px;
}
.hero-sub{
  font-size:17px;color:rgba(255,255,255,.82);font-weight:500;
  max-width:700px;margin-bottom:16px;
}
.hero-lead{
  font-size:15.5px;line-height:1.85;color:rgba(255,255,255,.7);
  max-width:740px;margin-bottom:30px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:28px}
.hero-tags{display:flex;flex-wrap:wrap;gap:9px}
.pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 15px;border-radius:999px;
  font-size:13px;font-weight:600;
  background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.2);
  color:rgba(255,255,255,.86);
}
.pill .dot{width:6px;height:6px;border-radius:50%;background:#7fd8bd}

/* ---------- metrics ---------- */
.section{padding:76px 0}
.section--alt{background:var(--bg-alt)}
.section--dark{background:var(--dark);color:#e8efea}
.section--dark .sec-title{color:#fff}
.section--dark .sec-desc{color:rgba(255,255,255,.66)}
.sec-head{max-width:730px;margin-bottom:38px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-head.center .eyebrow{justify-content:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:12.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand);
}
.eyebrow::before{content:"";width:22px;height:2px;background:currentColor;border-radius:2px}
.sec-title{font-size:clamp(24px,3.1vw,33px);margin:12px 0 14px;color:var(--ink)}
.sec-desc{font-size:15.5px;color:var(--muted);max-width:680px;line-height:1.8}

.metrics{margin-top:-46px;position:relative;z-index:5;padding:0}
.metrics-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  border-radius:var(--radius-l);
  overflow:hidden;
  box-shadow:var(--shadow);
}
.metric{background:var(--surface);padding:26px 24px;transition:background var(--ease)}
.metric:hover{background:#fbfcf9}
.metric strong{display:block;font-size:28px;font-weight:800;letter-spacing:-.03em;color:var(--ink);line-height:1.2}
.metric span{display:block;margin-top:6px;font-size:13.5px;color:var(--muted)}

/* ---------- cards ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.card{
  display:flex;flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:var(--shadow-s);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.card-media{position:relative;overflow:hidden;background:#dfe5dd}
.card-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .5s cubic-bezier(.4,0,.2,1)}
.card:hover .card-media img{transform:scale(1.045)}
.card-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:17.5px;color:var(--ink)}
.card-body p{font-size:14px;color:var(--muted);line-height:1.78}
.card-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:6px}
.tag{
  font-size:12px;font-weight:600;padding:4px 11px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand-dark);
}
.tag.neutral{background:#f0f2ee;color:var(--muted)}

/* ---------- syllabus ---------- */
.syllabus{display:grid;grid-template-columns:repeat(2,1fr);gap:0 44px}
.syllabus li{
  display:flex;gap:16px;align-items:flex-start;
  padding:20px 0;border-bottom:1px solid var(--line);
  transition:background var(--ease);
}
.syllabus .idx{
  flex:0 0 auto;font-size:13px;font-weight:800;color:var(--brand);
  letter-spacing:.06em;padding-top:2px;min-width:26px;
}
.syllabus h3{font-size:15.5px;margin-bottom:4px;color:var(--ink)}
.syllabus p{font-size:13.8px;color:var(--muted);line-height:1.72}

/* ---------- endorsement ---------- */
.endorse{
  display:grid;grid-template-columns:300px 1fr;gap:44px;align-items:center;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-l);
  padding:38px;box-shadow:var(--shadow-s);
}
.endorse-person{display:flex;flex-direction:column;gap:14px}
.avatar{
  width:76px;height:76px;border-radius:22px;display:grid;place-items:center;
  background:linear-gradient(140deg,#123c31,#2c8a71);color:#fff;
  font-size:26px;font-weight:800;letter-spacing:0;
  box-shadow:0 14px 28px rgba(18,60,49,.25);
}
.endorse-person strong{font-size:18px;color:var(--ink)}
.endorse-person span{font-size:13.5px;color:var(--muted)}
.endorse-quote{
  font-size:19px;line-height:1.72;font-weight:600;color:var(--ink);
  border-left:3px solid var(--brand);padding-left:22px;
}
.endorse-quote small{display:block;margin-top:16px;font-size:13.5px;font-weight:500;color:var(--muted);letter-spacing:.02em}
.endorse-facts{display:flex;flex-wrap:wrap;gap:26px;margin-top:24px}
.endorse-facts div strong{display:block;font-size:19px;color:var(--brand-dark)}
.endorse-facts div span{font-size:13px;color:var(--muted)}

/* ---------- quotes ---------- */
.quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.quote{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow-s);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.quote:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.stars{display:flex;gap:3px;margin-bottom:14px}
.stars i{width:14px;height:14px;background:var(--accent);clip-path:polygon(50% 0,61% 35%,98% 35%,68% 57%,79% 91%,50% 70%,21% 91%,32% 57%,2% 35%,39% 35%)}
.quote p{font-size:14.5px;color:var(--ink-soft);line-height:1.8}
.quote footer{margin-top:18px;padding-top:16px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
.quote footer strong{display:block;color:var(--ink);font-size:14px;font-weight:700;margin-bottom:2px}

/* ---------- experience ---------- */
.experience{
  position:relative;overflow:hidden;color:#fff;
  background:linear-gradient(120deg,rgba(10,18,15,.94) 0%,rgba(10,18,15,.8) 55%,rgba(10,18,15,.9) 100%),
             url("/assets/images/backpic/back-3.webp") center/cover no-repeat;
}
.experience .sec-title{color:#fff}
.experience .sec-desc{color:rgba(255,255,255,.7)}
.exp-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:8px}
.exp-card{
  background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.16);
  border-radius:var(--radius);padding:26px 24px;
  backdrop-filter:blur(6px);
  transition:transform var(--ease),background var(--ease),border-color var(--ease);
}
.exp-card:hover{transform:translateY(-4px);background:rgba(255,255,255,.11);border-color:rgba(255,255,255,.34)}
.exp-card .num{font-size:13px;font-weight:800;color:#8fdbc4;letter-spacing:.14em;margin-bottom:12px;display:block}
.exp-card h3{font-size:17px;color:#fff;margin-bottom:10px}
.exp-card p{font-size:14px;color:rgba(255,255,255,.72);line-height:1.78}
.exp-foot{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin-top:32px}

/* ---------- scenes ---------- */
.scenes{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.scene{
  display:flex;gap:18px;align-items:flex-start;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.scene:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.scene-ico{
  flex:0 0 auto;width:42px;height:42px;border-radius:12px;
  background:var(--brand-soft);color:var(--brand-dark);
  display:grid;place-items:center;
}
.scene-ico svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.scene h3{font-size:16px;margin-bottom:6px}
.scene p{font-size:13.8px;color:var(--muted);line-height:1.75}

/* ---------- compare ---------- */
.compare{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-l);overflow:hidden;box-shadow:var(--shadow-s);
}
.compare-row{display:grid;grid-template-columns:1fr 1.5fr 1.5fr}
.compare-row>div{padding:18px 24px;border-bottom:1px solid var(--line);font-size:14.2px;color:var(--ink-soft)}
.compare-row>div:last-child{border-right:0}
.compare-row.head>div{background:#f1f4ef;font-weight:700;font-size:13.5px;color:var(--ink);letter-spacing:.03em}
.compare-row:last-child>div{border-bottom:0}
.compare-row .cell-us{color:var(--brand-dark);font-weight:600}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;counter-reset:step}
.step{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:30px 24px 26px;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.step::before{
  counter-increment:step;content:"0" counter(step);
  position:absolute;top:20px;right:24px;
  font-size:34px;font-weight:800;color:#eef2ec;letter-spacing:-.04em;
}
.step h3{font-size:16.5px;margin:14px 0 8px}
.step p{font-size:13.8px;color:var(--muted);line-height:1.78}
.step .step-line{width:34px;height:3px;border-radius:3px;background:var(--brand)}

/* ---------- channels ---------- */
.channels{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.channel{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-s);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.channel:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.channel img{width:100%;aspect-ratio:16/9;object-fit:cover}
.channel-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.channel-body h3{font-size:17px}
.channel-body p{font-size:13.8px;color:var(--muted);line-height:1.76}
.channel-link{
  margin-top:auto;padding-top:14px;font-size:13.5px;font-weight:700;color:var(--brand-dark);
  display:inline-flex;align-items:center;gap:6px;
}
.channel:hover .channel-link .arrow{transform:translateX(4px)}
.channel-link .arrow{transition:transform var(--ease)}

/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:1.65fr 1fr;gap:28px}
.news-list{display:flex;flex-direction:column;gap:12px}
.news-item{
  display:block;padding:20px 22px;border-radius:var(--radius);
  background:var(--surface);border:1px solid var(--line);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.news-item:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.news-item h3{font-size:16px;margin-bottom:6px;transition:color var(--ease)}
.news-item:hover h3{color:var(--brand-dark)}
.news-item p{font-size:13.6px;color:var(--muted);line-height:1.75}
.news-time{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.06em;color:var(--brand);margin-bottom:8px}
.news-aside{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-l);
  padding:26px 24px;box-shadow:var(--shadow-s);height:fit-content;
}
.news-aside h3{font-size:15px;letter-spacing:.02em;margin-bottom:16px;padding-bottom:14px;border-bottom:1px solid var(--line)}
.news-aside a{display:block;padding:11px 0;border-bottom:1px dashed var(--line);font-size:14px;color:var(--ink-soft);transition:color var(--ease),padding-left var(--ease)}
.news-aside a:last-child{border-bottom:0}
.news-aside a:hover{color:var(--brand-dark);padding-left:4px}
.news-aside .news-time{margin-bottom:4px;font-size:11.5px}
.empty-note{
  padding:22px;border-radius:var(--radius);background:var(--surface);
  border:1px dashed var(--line-strong);color:var(--muted);font-size:14px;
}

/* ---------- topics ---------- */
.topics{display:flex;flex-wrap:wrap;gap:12px}
.topic{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 20px;border-radius:999px;
  background:var(--surface);border:1px solid var(--line);
  font-size:14px;font-weight:600;color:var(--ink-soft);
  transition:transform var(--ease),border-color var(--ease),color var(--ease),box-shadow var(--ease);
}
.topic:hover{transform:translateY(-2px);border-color:var(--brand);color:var(--brand-dark);box-shadow:var(--shadow-s)}
.topic .dot{width:6px;height:6px;border-radius:50%;background:var(--brand)}

/* ---------- faq ---------- */
.faq{max-width:860px;margin:0 auto}
.faq details{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px 24px;margin-bottom:12px;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.faq details[open]{border-color:var(--line-strong);box-shadow:var(--shadow-s)}
.faq summary{
  cursor:pointer;list-style:none;display:flex;align-items:center;justify-content:space-between;gap:18px;
  font-size:15.5px;font-weight:700;color:var(--ink);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"";width:11px;height:11px;flex:0 0 auto;
  border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);
  transform:rotate(45deg);transition:transform var(--ease);margin-top:-4px;
}
.faq details[open] summary::after{transform:rotate(-135deg);margin-top:2px}
.faq p{margin-top:14px;font-size:14.2px;color:var(--muted);line-height:1.85}

/* ---------- guarantee ---------- */
.guarantee{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.g-item{
  display:flex;gap:14px;align-items:flex-start;
  padding:22px;border-radius:var(--radius);
  background:var(--surface);border:1px solid var(--line);
  transition:border-color var(--ease),transform var(--ease);
}
.g-item:hover{border-color:var(--line-strong);transform:translateY(-3px)}
.g-item svg{width:22px;height:22px;flex:0 0 auto;stroke:var(--brand);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;margin-top:3px}
.g-item strong{display:block;font-size:14.5px;margin-bottom:4px;color:var(--ink)}
.g-item span{font-size:13px;color:var(--muted);line-height:1.7;display:block}

/* ---------- final cta ---------- */
.final-cta{
  position:relative;overflow:hidden;color:#fff;
  background:linear-gradient(120deg,rgba(12,20,17,.94),rgba(19,32,25,.86)),
             url("/assets/images/backpic/back-5.webp") center/cover no-repeat;
  padding:82px 0;text-align:center;
}
.final-cta h2{font-size:clamp(26px,3.4vw,38px);color:#fff;margin-bottom:16px;letter-spacing:-.02em}
.final-cta p{max-width:660px;margin:0 auto 30px;color:rgba(255,255,255,.72);font-size:15.5px;line-height:1.85}
.final-cta .hero-actions{justify-content:center;margin-bottom:0}

/* ---------- footer ---------- */
.site-footer{background:#080f0c;color:rgba(255,255,255,.66);padding:60px 0 26px}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:44px;
  padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.1);
}
.footer-brand{display:inline-flex;align-items:center;gap:10px;color:#fff;font-size:17px;font-weight:800;margin-bottom:14px}
.footer-about{font-size:13.6px;line-height:1.85;color:rgba(255,255,255,.6);max-width:360px}
.footer-col h4{font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:rgba(255,255,255,.5);margin-bottom:16px;font-weight:700}
.footer-col a{display:block;padding:7px 0;font-size:14px;color:rgba(255,255,255,.72);transition:color var(--ease),transform var(--ease)}
.footer-col a:hover{color:#fff;transform:translateX(3px)}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  padding-top:22px;font-size:12.8px;color:rgba(255,255,255,.42);
}
.footer-bottom .domain{letter-spacing:.02em}

/* ---------- sticky cta ---------- */
.sticky-cta{
  display:none;position:fixed;left:12px;right:12px;bottom:12px;z-index:85;
  align-items:center;justify-content:space-between;gap:12px;
  padding:11px 12px 11px 18px;border-radius:16px;
  background:rgba(10,18,15,.95);
  border:1px solid rgba(255,255,255,.14);
  box-shadow:0 18px 40px rgba(0,0,0,.35);
  backdrop-filter:blur(10px);
  color:#fff;
}
.sticky-cta strong{display:block;font-size:13.5px;font-weight:700}
.sticky-cta span{font-size:11.5px;color:rgba(255,255,255,.6)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .65s ease,transform .65s cubic-bezier(.4,0,.2,1)}
.reveal.is-visible{opacity:1;transform:none}
.no-js .reveal{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  .card:hover,.channel:hover,.step:hover,.scene:hover,.g-item:hover,.quote:hover{transform:none}
}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .dock-nav a{padding:9px 12px;font-size:14px}
  .endorse{grid-template-columns:1fr;gap:26px;padding:32px}
  .metrics-grid{grid-template-columns:repeat(2,1fr)}
  .guarantee{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:960px){
  .dock{padding:10px 12px 10px 16px}
  .nav-toggle{display:inline-flex}
  .dock-nav{
    display:none;position:absolute;left:0;right:0;top:calc(100% + 10px);
    flex-direction:column;align-items:stretch;gap:2px;
    background:#fff;border:1px solid var(--line);border-radius:18px;
    padding:10px;box-shadow:var(--shadow-lg);
  }
  .dock-nav.is-open{display:flex}
  .dock-nav a{padding:13px 16px;border-radius:12px;font-size:15px}
  .dock-cta{display:none}
  .grid-3,.quotes,.channels,.exp-grid,.steps{grid-template-columns:1fr 1fr}
  .news-grid{grid-template-columns:1fr}
  .syllabus{grid-template-columns:1fr}
  .scenes{grid-template-columns:1fr}
}
@media (max-width:768px){
  .container{width:calc(100% - 36px)}
  .section{padding:58px 0}
  .hero{padding:44px 0 56px}
  .hero-body{padding-top:34px}
  .hero-sub{font-size:15.5px}
  .hero-actions{gap:10px}
  .hero-actions .btn{flex:1 1 100%}
  .metrics{margin-top:-32px}
  .metrics-grid{grid-template-columns:1fr 1fr}
  .metric{padding:20px 18px}
  .metric strong{font-size:23px}
  .grid-3,.quotes,.channels,.exp-grid,.steps,.grid-2,.guarantee{grid-template-columns:1fr}
  .compare-row{grid-template-columns:1fr}
  .compare-row.head{display:none}
  .compare-row>div{padding:14px 18px;font-size:13.8px;border-bottom:1px solid var(--line)}
  .compare-row>div:nth-child(1){background:#f1f4ef;font-weight:700;color:var(--ink)}
  .endorse-quote{font-size:16.5px;padding-left:16px}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .sticky-cta{display:flex}
  body{padding-bottom:86px}
  .final-cta{padding:60px 0}
  .final-cta .hero-actions .btn{flex:1 1 100%}
}
@media (max-width:520px){
  .hero-series{gap:4px;padding:6px}
  .hero-series-label{display:none}
  .hero-series a{padding:6px 12px;font-size:12.5px}
  .hero h1{font-size:30px}
  .metrics-grid{grid-template-columns:1fr}
  .endorse{padding:24px}
  .endorse-facts{gap:18px}
  .card-body,.news-aside,.exp-card{padding:20px}
  .footer-bottom{flex-direction:column}
  .sticky-cta{padding:10px 10px 10px 14px}
  .sticky-cta .btn{padding:9px 14px;font-size:13px}
}

/* roulang page: article */
:root{
  --ink:#101713;
  --ink-soft:#2a3430;
  --muted:#68756e;
  --bg:#f5f6f3;
  --bg-alt:#ecefe9;
  --surface:#ffffff;
  --line:#e2e6e0;
  --line-strong:#cfd8d0;
  --brand:#1f6f5c;
  --brand-dark:#155a49;
  --brand-soft:#e4f1ec;
  --accent:#c2a15c;
  --dark:#0c1411;
  --dark-2:#132019;
  --radius-s:8px;
  --radius:14px;
  --radius-l:22px;
  --shadow-s:0 2px 8px rgba(16,23,19,.05);
  --shadow:0 12px 30px rgba(16,23,19,.08);
  --shadow-lg:0 24px 60px rgba(16,23,19,.16);
  --ease:.22s cubic-bezier(.4,0,.2,1);
  --container:1180px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:15.5px;
  line-height:1.78;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0}
p{margin:0 0 14px}
.container{width:min(var(--container),calc(100% - 48px));margin:0 auto}

/* ---------- header dock ---------- */
.site-header{
  position:sticky;top:0;z-index:90;
  padding:16px 0 10px;
  background:linear-gradient(180deg,rgba(245,246,243,.97) 0%,rgba(245,246,243,.78) 62%,rgba(245,246,243,0) 100%);
  transition:box-shadow var(--ease);
}
.site-header.is-scrolled .dock{box-shadow:0 16px 40px rgba(16,23,19,.15)}
.dock{
  position:relative;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:10px 12px 10px 18px;
  background:rgba(255,255,255,.92);
  border:1px solid var(--line);
  border-radius:999px;
  box-shadow:var(--shadow-s);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:box-shadow var(--ease);
}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
.brand-mark{
  width:32px;height:32px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--brand) 0%,#35937a 100%);
  color:#fff;font-size:14px;font-weight:800;letter-spacing:0;
  box-shadow:0 6px 14px rgba(31,111,92,.28);
}
.dock-nav{display:flex;align-items:center;gap:2px}
.dock-nav a{
  display:inline-flex;align-items:center;
  padding:9px 15px;border-radius:999px;
  font-size:14.5px;font-weight:500;color:var(--ink-soft);
  transition:background var(--ease),color var(--ease);
}
.dock-nav a:hover{background:var(--brand-soft);color:var(--brand-dark)}
.dock-nav a.active{background:var(--ink);color:#fff;font-weight:600}
.dock-nav a:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.dock-cta{display:inline-flex;align-items:center;gap:6px}
.nav-toggle{
  display:none;align-items:center;justify-content:center;gap:5px;
  width:44px;height:44px;border-radius:999px;border:1px solid var(--line);
  background:#fff;cursor:pointer;
}
.nav-toggle span{display:block;width:16px;height:2px;background:var(--ink);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:var(--ink);border-radius:2px;
  transition:transform var(--ease),top var(--ease);
}
.nav-toggle span::before{top:-5px}
.nav-toggle span::after{top:5px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--radius-s);
  font-size:15px;font-weight:700;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:background var(--ease),color var(--ease),transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:3px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px rgba(31,111,92,.26)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px);box-shadow:0 14px 30px rgba(31,111,92,.34)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-dark);background:#fff;transform:translateY(-2px)}
.btn-light{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.34)}
.btn-light:hover{background:rgba(255,255,255,.2);transform:translateY(-2px)}
.btn-sm{padding:9px 16px;font-size:13.5px;border-radius:var(--radius-s)}
.btn .arrow{transition:transform var(--ease)}
.btn:hover .arrow{transform:translateX(3px)}

/* ---------- article hero ---------- */
.article-hero{
  position:relative;overflow:hidden;color:#fff;
  padding:54px 0 96px;
  background:linear-gradient(180deg,#0b1512 0%,#132019 100%);
}
.article-hero::before{
  content:"";position:absolute;left:-12%;right:-12%;top:-30%;height:165%;
  background:
    linear-gradient(122deg,rgba(31,111,92,.94) 0%,rgba(21,90,73,.62) 42%,rgba(12,20,17,.08) 74%),
    url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
  clip-path:polygon(0 0,100% 0,100% 60%,0 100%);
  opacity:.92;
}
.article-hero::after{
  content:"";position:absolute;right:-60px;top:-40px;width:280px;height:280px;border-radius:50%;
  border:1px solid rgba(255,255,255,.16);
}
.article-hero .container{position:relative;z-index:2}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.68);margin-bottom:22px}
.breadcrumb a{color:rgba(255,255,255,.86);border-bottom:1px solid rgba(255,255,255,.28);padding-bottom:1px;transition:color var(--ease),border-color var(--ease)}
.breadcrumb a:hover{color:#fff;border-color:#fff}
.breadcrumb .sep{opacity:.5}
.hero-tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.tag{
  display:inline-flex;align-items:center;
  padding:6px 13px;border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);color:rgba(255,255,255,.9);
}
.tag-solid{background:#fff;color:var(--brand-dark);border-color:#fff}
.article-hero h1{
  font-size:clamp(28px,4vw,44px);
  line-height:1.24;letter-spacing:-.022em;
  max-width:900px;margin-bottom:18px;color:#fff;
}
.article-hero .hero-summary{
  max-width:760px;font-size:15.5px;line-height:1.85;color:rgba(255,255,255,.78);
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
  margin-top:26px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.16);
  font-size:13.5px;color:rgba(255,255,255,.7);
}
.article-meta strong{color:#fff;font-weight:700}
.article-meta .meta-dot{width:5px;height:5px;border-radius:50%;background:rgba(255,255,255,.42)}

/* ---------- layout ---------- */
.section{padding:74px 0}
.section-tight{padding:56px 0}
.section-alt{background:var(--bg-alt)}
.section-line{border-top:1px solid var(--line)}
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,720px) 316px;
  gap:36px;
  align-items:start;
  justify-content:center;
}
.panel{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-l);
  box-shadow:var(--shadow-s);
}
.article-body{padding:42px 44px}
.article-body > :first-child{margin-top:0}
.article-body h2{
  position:relative;
  font-size:23px;line-height:1.4;letter-spacing:-.01em;
  margin:38px 0 14px;padding-left:15px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.3em;bottom:.3em;width:3px;border-radius:3px;background:var(--brand);
}
.article-body h3{font-size:18px;line-height:1.5;margin:28px 0 10px;color:var(--ink)}
.article-body p{font-size:15.5px;line-height:1.85;color:var(--ink-soft)}
.article-body a{color:var(--brand-dark);border-bottom:1px solid rgba(31,111,92,.35);transition:color var(--ease),border-color var(--ease)}
.article-body a:hover{color:var(--brand);border-color:var(--brand)}
.article-body strong{color:var(--ink);font-weight:700}
.article-body ul,.article-body ol{margin:0 0 16px;padding-left:22px;color:var(--ink-soft)}
.article-body li{margin-bottom:8px;line-height:1.8}
.article-body li::marker{color:var(--brand)}
.article-body blockquote{
  margin:22px 0;padding:16px 20px;
  background:var(--brand-soft);
  border-left:3px solid var(--brand);
  border-radius:var(--radius-s);
  color:var(--brand-dark);font-size:15px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--radius);margin:22px 0;box-shadow:var(--shadow-s)}
.article-body table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14.5px}
.article-body th,.article-body td{padding:11px 14px;border-bottom:1px solid var(--line);text-align:left}
.article-body th{background:var(--bg-alt);font-weight:700;color:var(--ink)}
.article-body tr:last-child td{border-bottom:none}
.article-body hr{border:none;border-top:1px solid var(--line);margin:30px 0}
.empty-state{padding:26px 0 6px;text-align:left}
.empty-state h2{margin-top:0}
.empty-state p{color:var(--muted)}

/* ---------- sidebar ---------- */
.side-stack{display:grid;gap:18px;position:sticky;top:96px}
.side-card{padding:22px 22px 20px}
.side-card h3{
  font-size:14px;font-weight:800;letter-spacing:.06em;
  color:var(--muted);text-transform:uppercase;margin-bottom:14px;
}
.side-list{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.side-list li{display:flex;justify-content:space-between;gap:12px;font-size:14px;color:var(--ink-soft);padding-bottom:11px;border-bottom:1px dashed var(--line)}
.side-list li:last-child{border-bottom:none;padding-bottom:0}
.side-list .k{color:var(--muted)}
.side-list .v{font-weight:700;color:var(--ink);text-align:right}
.value-table{display:grid;gap:8px}
.value-row{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:8px 12px;background:var(--bg-alt);border-radius:var(--radius-s);font-size:13.5px}
.value-row b{color:var(--brand-dark)}
.side-note{font-size:13px;color:var(--muted);line-height:1.75;margin:14px 0 0}

/* ---------- section heading ---------- */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:30px;flex-wrap:wrap}
.sec-head .eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:12.5px;font-weight:700;letter-spacing:.14em;color:var(--brand);text-transform:uppercase;margin-bottom:10px}
.sec-head .eyebrow::before{content:"";width:24px;height:2px;border-radius:2px;background:var(--brand)}
.sec-head h2{font-size:clamp(22px,2.6vw,30px);line-height:1.3;letter-spacing:-.02em}
.sec-head p{color:var(--muted);font-size:14.5px;max-width:560px;margin:8px 0 0}

/* ---------- keypoints ---------- */
.keypoint-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.keypoint{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 22px;box-shadow:var(--shadow-s);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.keypoint:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.keypoint .num{
  display:inline-flex;align-items:center;justify-content:center;
  width:30px;height:30px;border-radius:9px;margin-bottom:14px;
  background:var(--brand-soft);color:var(--brand-dark);font-size:13px;font-weight:800;
}
.keypoint h3{font-size:16.5px;margin-bottom:8px;line-height:1.45}
.keypoint p{font-size:14px;line-height:1.8;color:var(--muted);margin:0}
.keypoint .mini-tag{display:inline-block;margin-top:14px;font-size:12px;font-weight:700;color:var(--brand-dark);background:var(--brand-soft);padding:4px 10px;border-radius:999px}

/* ---------- feature split ---------- */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}
.split-media{position:relative;border-radius:var(--radius-l);overflow:hidden;box-shadow:var(--shadow)}
.split-media img{width:100%;height:340px;object-fit:cover;transition:transform .5s var(--ease)}
.split-media:hover img{transform:scale(1.04)}
.split-media .media-badge{
  position:absolute;left:18px;bottom:18px;
  background:rgba(12,20,17,.82);color:#fff;font-size:12.5px;font-weight:600;
  padding:8px 14px;border-radius:999px;backdrop-filter:blur(8px);
}
.check-list{list-style:none;margin:18px 0 0;padding:0;display:grid;gap:14px}
.check-list li{display:flex;gap:12px;font-size:14.8px;color:var(--ink-soft);line-height:1.75}
.check-list .mark{
  flex:none;width:22px;height:22px;border-radius:7px;margin-top:3px;
  background:var(--brand-soft);color:var(--brand-dark);
  display:grid;place-items:center;font-size:12px;font-weight:800;
}
.check-list b{color:var(--ink)}

/* ---------- channel matrix ---------- */
.channel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.channel{
  display:flex;flex-direction:column;gap:10px;
  padding:26px 24px;border-radius:var(--radius);
  background:var(--surface);border:1px solid var(--line);
  box-shadow:var(--shadow-s);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.channel:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--brand)}
.channel .ch-icon{
  width:36px;height:36px;border-radius:11px;display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand-dark);
}
.channel h3{font-size:17px;letter-spacing:-.01em}
.channel p{font-size:13.8px;color:var(--muted);line-height:1.75;margin:0}
.channel .ch-link{font-size:13.5px;font-weight:700;color:var(--brand-dark);display:inline-flex;align-items:center;gap:6px;margin-top:4px}
.channel:hover .ch-link .arrow{transform:translateX(3px)}
.channel .ch-link .arrow{transition:transform var(--ease)}

/* ---------- news list ---------- */
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.news-item{
  display:flex;gap:16px;align-items:center;
  padding:16px;border-radius:var(--radius);
  background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-s);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.news-item:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.news-thumb{flex:none;width:76px;height:76px;border-radius:var(--radius-s);overflow:hidden;background:var(--bg-alt)}
.news-thumb img{width:100%;height:100%;object-fit:cover}
.news-item h3{font-size:15px;line-height:1.55;margin:0 0 6px}
.news-item .news-meta{font-size:12.5px;color:var(--muted)}

/* ---------- faq ---------- */
.faq-list{display:grid;gap:12px;max-width:860px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-s);overflow:hidden;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.faq-item[open]{border-color:var(--brand);box-shadow:var(--shadow)}
.faq-item summary{
  cursor:pointer;list-style:none;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;font-size:15.5px;font-weight:700;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:focus-visible{outline:2px solid var(--brand);outline-offset:-4px}
.faq-item summary .plus{
  flex:none;width:24px;height:24px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand-dark);font-size:15px;font-weight:700;
  transition:transform var(--ease),background var(--ease),color var(--ease);
}
.faq-item[open] summary .plus{transform:rotate(45deg);background:var(--brand);color:#fff}
.faq-item .faq-body{padding:0 22px 20px;color:var(--muted);font-size:14.6px;line-height:1.85}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;overflow:hidden;color:#fff;
  background:linear-gradient(115deg,#0d1814 0%,#153f34 58%,#1f6f5c 100%);
  border-radius:var(--radius-l);
  padding:44px 46px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  box-shadow:var(--shadow-lg);
}
.cta-band::after{
  content:"";position:absolute;right:-70px;top:-70px;width:240px;height:240px;border-radius:50%;
  border:1px solid rgba(255,255,255,.18);
}
.cta-band h2{font-size:clamp(21px,2.5vw,28px);line-height:1.35;letter-spacing:-.02em;margin-bottom:8px;position:relative;z-index:1}
.cta-band p{color:rgba(255,255,255,.76);font-size:14.5px;margin:0;max-width:560px;position:relative;z-index:1}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:1}

/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.7);padding:60px 0 26px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr .8fr .8fr;gap:40px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.12)}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:800;color:#fff;margin-bottom:14px}
.footer-about{font-size:13.8px;line-height:1.85;color:rgba(255,255,255,.62);max-width:420px;margin:0}
.footer-col h4{font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:rgba(255,255,255,.5);margin-bottom:16px}
.footer-col a{display:block;font-size:14px;color:rgba(255,255,255,.74);padding:6px 0;transition:color var(--ease),transform var(--ease)}
.footer-col a:hover{color:#fff;transform:translateX(3px)}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;padding-top:22px;font-size:13px;color:rgba(255,255,255,.5)}
.footer-bottom .domain{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.02em;color:rgba(255,255,255,.42)}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:26px}
  .side-stack{position:static;grid-template-columns:repeat(2,1fr);display:grid}
  .article-body{padding:34px 30px}
  .split{grid-template-columns:1fr;gap:26px}
  .split-media img{height:300px}
  .keypoint-grid{grid-template-columns:repeat(2,1fr)}
  .channel-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1.2fr .9fr .9fr;gap:28px}
}
@media (max-width:860px){
  .nav-toggle{display:inline-flex}
  .dock{padding:9px 10px 9px 16px}
  .dock-nav{
    position:absolute;top:calc(100% + 10px);left:0;right:0;
    flex-direction:column;align-items:stretch;gap:4px;
    padding:10px;border-radius:18px;background:#fff;
    border:1px solid var(--line);box-shadow:var(--shadow);
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity var(--ease),transform var(--ease),visibility var(--ease);
    z-index:95;
  }
  .dock-nav.is-open{opacity:1;visibility:visible;transform:translateY(0)}
  .dock-nav a{padding:11px 14px;border-radius:10px;font-size:15px}
  .article-hero{padding:40px 0 70px}
  .article-hero::before{clip-path:polygon(0 0,100% 0,100% 78%,0 100%)}
  .section{padding:52px 0}
  .news-grid{grid-template-columns:1fr}
  .cta-band{padding:32px 26px}
  .side-stack{grid-template-columns:1fr}
}
@media (max-width:520px){
  .container{width:calc(100% - 32px)}
  .brand{font-size:15.5px;gap:8px}
  .brand-mark{width:28px;height:28px;border-radius:9px;font-size:12.5px}
  .dock-cta .btn{padding:8px 12px;font-size:12.5px}
  .dock-cta .btn .btn-label-long{display:none}
  .article-hero h1{font-size:26px}
  .article-body{padding:26px 20px}
  .article-body h2{font-size:20px}
  .keypoint-grid,.channel-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .split-media img{height:220px}
  .news-item{flex-direction:row;align-items:flex-start}
  .news-thumb{width:64px;height:64px}
  .cta-actions .btn{width:100%}
}

/* roulang page: category1 */
:root{
  --ink:#101713;
  --ink-soft:#2a3430;
  --muted:#68756e;
  --bg:#f5f6f3;
  --bg-alt:#ecefe9;
  --surface:#ffffff;
  --line:#e2e6e0;
  --line-strong:#cfd8d0;
  --brand:#1f6f5c;
  --brand-dark:#155a49;
  --brand-soft:#e4f1ec;
  --accent:#c2a15c;
  --dark:#0c1411;
  --dark-2:#132019;
  --radius-s:8px;
  --radius:14px;
  --radius-l:22px;
  --shadow-s:0 2px 8px rgba(16,23,19,.05);
  --shadow:0 12px 30px rgba(16,23,19,.08);
  --shadow-lg:0 24px 60px rgba(16,23,19,.16);
  --ease:.22s cubic-bezier(.4,0,.2,1);
  --container:1180px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:15.5px;
  line-height:1.78;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;letter-spacing:-.02em;line-height:1.3}
p{margin:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:4px}
.container{width:min(var(--container),calc(100% - 48px));margin:0 auto}

/* ---------- header dock ---------- */
.site-header{
  position:sticky;top:0;z-index:90;
  padding:16px 0 10px;
  background:linear-gradient(180deg,rgba(245,246,243,.97) 0%,rgba(245,246,243,.78) 62%,rgba(245,246,243,0) 100%);
}
.site-header.is-scrolled .dock{box-shadow:0 16px 40px rgba(16,23,19,.15)}
.dock{
  position:relative;
  display:flex;align-items:center;gap:18px;
  padding:9px 12px 9px 18px;
  background:rgba(255,255,255,.9);
  border:1px solid var(--line);
  border-radius:999px;
  box-shadow:var(--shadow-s);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:box-shadow var(--ease);
}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
.brand-mark{
  width:32px;height:32px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--brand) 0%,#35937a 100%);
  color:#fff;font-size:14px;font-weight:800;
  box-shadow:0 6px 14px rgba(31,111,92,.28);
}
.dock-nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.dock-nav a{
  display:inline-flex;align-items:center;
  padding:9px 15px;border-radius:999px;
  font-size:14.5px;font-weight:500;color:var(--ink-soft);
  transition:background var(--ease),color var(--ease);
}
.dock-nav a:hover{background:var(--brand-soft);color:var(--brand-dark)}
.dock-nav a.active{background:var(--ink);color:#fff;font-weight:600}
.dock-cta{display:inline-flex;align-items:center;margin-left:6px}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:999px;border:1px solid var(--line);
  background:#fff;cursor:pointer;transition:background var(--ease),border-color var(--ease);
}
.nav-toggle:hover{background:var(--brand-soft);border-color:var(--brand)}
.nav-toggle span{display:block;width:16px;height:2px;background:var(--ink);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:var(--ink);border-radius:2px;
  transition:transform var(--ease),top var(--ease);
}
.nav-toggle span::before{top:-5px}
.nav-toggle span::after{top:5px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--radius-s);
  font-size:15px;font-weight:700;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:background var(--ease),color var(--ease),transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px rgba(31,111,92,.26)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px);box-shadow:0 14px 30px rgba(31,111,92,.34)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-dark);background:#fff;transform:translateY(-2px)}
.btn-light{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.34)}
.btn-light:hover{background:rgba(255,255,255,.2);transform:translateY(-2px)}
.btn-white{background:#fff;color:var(--ink);box-shadow:0 10px 24px rgba(0,0,0,.18)}
.btn-white:hover{transform:translateY(-2px);background:#f3f6f2}
.btn-sm{padding:9px 18px;font-size:13.5px;border-radius:var(--radius-s)}
.btn .arrow{transition:transform var(--ease)}
.btn:hover .arrow{transform:translateX(3px)}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;color:#fff;
  padding:56px 0 96px;
  background:
    linear-gradient(180deg,rgba(9,16,13,.86) 0%,rgba(9,16,13,.74) 48%,rgba(9,16,13,.92) 100%),
    url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
}
.hero::after{
  content:"";position:absolute;inset:auto 0 0 0;height:130px;
  background:linear-gradient(180deg,rgba(245,246,243,0) 0%,rgba(245,246,243,.12) 100%);
  pointer-events:none;
}
.hero-grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr);
  gap:52px;align-items:center;
}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:12.5px;font-weight:700;letter-spacing:.14em;
  color:#9ad9c5;
}
.hero-eyebrow::before{content:"";width:26px;height:2px;background:#9ad9c5;border-radius:2px}
.hero h1{
  margin:16px 0 16px;
  font-size:clamp(30px,4.2vw,46px);
  line-height:1.2;letter-spacing:-.025em;color:#fff;
}
.hero-sub{font-size:16.5px;color:rgba(255,255,255,.84);font-weight:600;margin-bottom:14px}
.hero-lead{font-size:15px;line-height:1.85;color:rgba(255,255,255,.72);max-width:560px;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px}
.hero-tags{display:flex;flex-wrap:wrap;gap:9px}
.pill{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 15px;border-radius:999px;
  font-size:12.5px;font-weight:600;
  background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.2);
  color:rgba(255,255,255,.86);
}
.pill .dot{width:6px;height:6px;border-radius:50%;background:#7fd8bd}

.hero-panel{
  background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.15);
  border-radius:var(--radius-l);
  padding:26px 24px;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:0 26px 60px rgba(0,0,0,.3);
}
.panel-head{
  display:flex;align-items:center;justify-content:space-between;
  padding-bottom:14px;margin-bottom:6px;
  border-bottom:1px solid rgba(255,255,255,.14);
}
.panel-head span{font-size:13px;font-weight:700;letter-spacing:.12em;color:#9ad9c5}
.panel-head em{font-style:normal;font-size:12px;color:rgba(255,255,255,.5)}
.panel-row{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:13px 0;border-bottom:1px dashed rgba(255,255,255,.12);
}
.panel-row:last-of-type{border-bottom:none}
.panel-row b{font-size:14.5px;font-weight:600;color:rgba(255,255,255,.92)}
.panel-row span{font-size:13.5px;color:rgba(255,255,255,.7);text-align:right}
.panel-note{
  margin-top:14px;padding-top:14px;border-top:1px solid rgba(255,255,255,.14);
  font-size:12.5px;line-height:1.7;color:rgba(255,255,255,.55);
}

/* ---------- metrics ---------- */
.metrics-wrap{position:relative;z-index:3;margin-top:-46px}
.metrics-grid{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-l);box-shadow:var(--shadow);overflow:hidden;
}
.metric{padding:26px 24px;border-right:1px solid var(--line)}
.metric:last-child{border-right:none}
.metric b{display:block;font-size:26px;font-weight:800;letter-spacing:-.03em;color:var(--brand-dark);line-height:1.2}
.metric b small{font-size:14px;font-weight:700;margin-left:2px}
.metric p{margin-top:6px;font-size:13px;color:var(--muted);line-height:1.6}

/* ---------- section ---------- */
.section{padding:78px 0}
.section-alt{background:var(--bg-alt)}
.section-dark{background:var(--dark);color:#fff}
.section-head{max-width:720px;margin-bottom:40px}
.section-head .tag-line{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:700;letter-spacing:.14em;color:var(--brand);
  margin-bottom:12px;
}
.section-head .tag-line::before{content:"";width:22px;height:2px;background:var(--brand);border-radius:2px}
.section-head h2{font-size:clamp(24px,2.8vw,32px);font-weight:800;margin-bottom:12px}
.section-head p{color:var(--muted);font-size:15px}
.section-dark .section-head .tag-line{color:#9ad9c5}
.section-dark .section-head .tag-line::before{background:#9ad9c5}
.section-dark .section-head h2{color:#fff}
.section-dark .section-head p{color:rgba(255,255,255,.68)}

/* ---------- grid & cards ---------- */
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:26px;
  box-shadow:var(--shadow-s);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.card .card-icon{
  width:42px;height:42px;border-radius:12px;
  background:var(--brand-soft);color:var(--brand-dark);
  display:grid;place-items:center;margin-bottom:16px;
}
.card h3{font-size:17.5px;font-weight:700;margin-bottom:10px}
.card p{font-size:14.5px;color:var(--muted);line-height:1.78}
.card .tag{display:inline-flex;margin-top:16px}
.tag{
  display:inline-flex;align-items:center;padding:4px 12px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand-dark);
  font-size:12px;font-weight:700;letter-spacing:.02em;
}
.tag-accent{background:rgba(194,161,92,.16);color:#8c6f2f}

/* ---------- value table ---------- */
.table-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-l);
  box-shadow:var(--shadow-s);overflow:hidden;
}
.rule-table{width:100%;border-collapse:collapse;font-size:14.5px}
.rule-table thead th{
  background:var(--brand-soft);color:var(--brand-dark);
  text-align:left;font-weight:700;font-size:13px;letter-spacing:.06em;
  padding:14px 22px;
}
.rule-table tbody td{padding:15px 22px;border-top:1px solid var(--line);color:var(--ink-soft)}
.rule-table tbody tr:hover td{background:#f8faf7}
.rule-table td strong{color:var(--brand-dark)}
.table-foot{
  padding:16px 22px;border-top:1px solid var(--line);
  font-size:13px;color:var(--muted);background:#fbfcfa;
}
.value-side{display:grid;gap:18px;align-content:start}
.mini-card{
  background:var(--surface);border:1px solid var(--line);
  border-left:3px solid var(--accent);
  border-radius:var(--radius);padding:20px 22px;box-shadow:var(--shadow-s);
}
.mini-card h4{font-size:15px;font-weight:700;margin-bottom:8px}
.mini-card p{font-size:13.8px;color:var(--muted);line-height:1.75}

/* ---------- flow ---------- */
.flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.step{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:26px 22px;box-shadow:var(--shadow-s);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.step-num{
  display:inline-block;font-size:12px;font-weight:800;letter-spacing:.16em;
  color:var(--accent);margin-bottom:12px;
}
.step h3{font-size:16.5px;font-weight:700;margin-bottom:9px}
.step p{font-size:14px;color:var(--muted);line-height:1.74}

/* ---------- road cards ---------- */
.road-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow-s);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.road-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.road-card .thumb{aspect-ratio:16/10;overflow:hidden;background:var(--bg-alt)}
.road-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.road-card:hover .thumb img{transform:scale(1.04)}
.road-card .body{padding:22px}
.road-card h3{font-size:16.5px;font-weight:700;margin-bottom:8px}
.road-card p{font-size:14px;color:var(--muted);line-height:1.74}

/* ---------- compare ---------- */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.compare-col{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-l);padding:0;overflow:hidden;box-shadow:var(--shadow-s);
}
.compare-col header{
  padding:18px 24px;font-size:14px;font-weight:800;letter-spacing:.06em;
}
.compare-col.wrong header{background:#f6efec;color:#8d4b3a}
.compare-col.right header{background:var(--brand-soft);color:var(--brand-dark)}
.compare-col ul{padding:10px 24px 22px}
.compare-col li{
  display:flex;gap:12px;padding:13px 0;border-bottom:1px dashed var(--line);
  font-size:14.2px;color:var(--ink-soft);line-height:1.7;
}
.compare-col li:last-child{border-bottom:none}
.compare-col li::before{
  content:"";flex:none;width:7px;height:7px;border-radius:50%;
  margin-top:9px;background:var(--line-strong);
}
.compare-col.right li::before{background:var(--brand)}
.compare-col.wrong li::before{background:#c58a76}

/* ---------- practice ---------- */
.practice-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.9fr);gap:44px;align-items:center}
.practice-figure{border-radius:var(--radius-l);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line)}
.practice-figure img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
.check-list{display:grid;gap:14px;margin-top:26px}
.check-list li{
  display:flex;gap:12px;font-size:14.6px;color:var(--ink-soft);line-height:1.75;
}
.check-list li i{
  flex:none;width:22px;height:22px;border-radius:50%;
  background:var(--brand-soft);color:var(--brand-dark);
  display:grid;place-items:center;margin-top:3px;
  font-style:normal;font-size:12px;font-weight:800;
}

/* ---------- faq ---------- */
.faq-list{display:grid;gap:14px;max-width:900px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:0 24px;box-shadow:var(--shadow-s);
  transition:border-color var(--ease),box-shadow var(--ease);
}
.faq-item[open]{border-color:var(--line-strong);box-shadow:var(--shadow)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:20px 0;
  font-size:15.5px;font-weight:700;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";flex:none;width:26px;height:26px;border-radius:50%;
  display:grid;place-items:center;background:var(--brand-soft);color:var(--brand-dark);
  font-size:16px;font-weight:700;transition:transform var(--ease),background var(--ease);
}
.faq-item[open] summary::after{content:"−";background:var(--brand);color:#fff}
.faq-item .answer{padding:0 0 22px;font-size:14.5px;color:var(--muted);line-height:1.82;max-width:780px}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;overflow:hidden;color:#fff;border-radius:var(--radius-l);
  padding:52px 48px;
  background:
    linear-gradient(120deg,rgba(10,18,14,.94) 0%,rgba(10,18,14,.72) 60%,rgba(10,18,14,.88) 100%),
    url("/assets/images/backpic/back-7.webp") center/cover no-repeat;
  box-shadow:var(--shadow-lg);
}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;position:relative;z-index:2}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);font-weight:800;margin-bottom:10px;color:#fff}
.cta-band p{font-size:14.5px;color:rgba(255,255,255,.74);max-width:560px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{
  background:var(--dark-2);color:rgba(255,255,255,.72);
  padding:64px 0 28px;margin-top:0;
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:48px;
  padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.1);
}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:800;color:#fff;margin-bottom:16px}
.footer-about{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);max-width:420px}
.footer-col h4{font-size:13.5px;font-weight:700;letter-spacing:.1em;color:#fff;margin-bottom:16px}
.footer-col a{
  display:block;padding:6px 0;font-size:14px;color:rgba(255,255,255,.62);
  transition:color var(--ease),transform var(--ease);
}
.footer-col a:hover{color:#9ad9c5;transform:translateX(3px)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding-top:24px;font-size:13px;color:rgba(255,255,255,.42);flex-wrap:wrap;
}
.footer-bottom .domain{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.02em}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-panel{max-width:560px}
  .metrics-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .metric:nth-child(2){border-right:none}
  .metric:nth-child(1),.metric:nth-child(2){border-bottom:1px solid var(--line)}
  .grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .flow{grid-template-columns:repeat(2,minmax(0,1fr))}
  .practice-grid{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .cta-band{padding:44px 34px}
}
@media (max-width:860px){
  .container{width:calc(100% - 32px)}
  .nav-toggle{display:inline-flex}
  .dock-nav{
    position:absolute;top:calc(100% + 10px);left:0;right:0;
    flex-direction:column;align-items:stretch;gap:4px;margin-left:0;
    background:#fff;border:1px solid var(--line);border-radius:18px;
    padding:10px;box-shadow:var(--shadow);
    display:none;
  }
  .dock-nav.open{display:flex}
  .dock-nav a{padding:12px 14px;border-radius:12px;justify-content:flex-start}
  .dock-cta{margin-left:auto}
  .hero{padding:40px 0 88px}
  .section{padding:60px 0}
  .compare{grid-template-columns:1fr}
  .grid-2{grid-template-columns:1fr}
}
@media (max-width:640px){
  body{font-size:15px}
  .dock-cta{display:none}
  .grid-3,.grid-4,.flow{grid-template-columns:1fr}
  .metrics-grid{grid-template-columns:1fr}
  .metric{border-right:none;border-bottom:1px solid var(--line)}
  .metric:last-child{border-bottom:none}
  .hero h1{font-size:29px}
  .hero-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .cta-band{padding:36px 24px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .faq-item{padding:0 18px}
  .rule-table thead th,.rule-table tbody td{padding:12px 16px}
}

/* roulang page: category3 */
:root{
  --ink:#101713;
  --ink-soft:#2a3430;
  --muted:#68756e;
  --bg:#f5f6f3;
  --bg-alt:#ecefe9;
  --surface:#ffffff;
  --line:#e2e6e0;
  --line-strong:#cfd8d0;
  --brand:#1f6f5c;
  --brand-dark:#155a49;
  --brand-soft:#e4f1ec;
  --accent:#c2a15c;
  --dark:#0c1411;
  --dark-2:#132019;
  --radius-s:8px;
  --radius:14px;
  --radius-l:22px;
  --shadow-s:0 2px 8px rgba(16,23,19,.05);
  --shadow:0 12px 30px rgba(16,23,19,.08);
  --shadow-lg:0 24px 60px rgba(16,23,19,.16);
  --ease:.22s cubic-bezier(.4,0,.2,1);
  --container:1180px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:15.5px;
  line-height:1.78;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer}
input,textarea{font:inherit}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px}
.container{width:min(var(--container),calc(100% - 48px));margin:0 auto}

/* ---------- header dock ---------- */
.site-header{
  position:sticky;top:0;z-index:90;
  padding:16px 0 10px;
  background:linear-gradient(180deg,rgba(245,246,243,.97) 0%,rgba(245,246,243,.78) 62%,rgba(245,246,243,0) 100%);
}
.site-header.is-scrolled .dock{box-shadow:0 16px 40px rgba(16,23,19,.15)}
.dock{
  position:relative;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:10px 12px 10px 18px;
  border-radius:999px;
  background:rgba(255,255,255,.88);
  border:1px solid var(--line);
  box-shadow:var(--shadow-s);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:box-shadow var(--ease);
}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
.brand-mark{
  width:32px;height:32px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--brand) 0%,#35937a 100%);
  color:#fff;font-size:14px;font-weight:800;letter-spacing:0;
  box-shadow:0 6px 14px rgba(31,111,92,.28);
}
.dock-nav{display:flex;align-items:center;gap:2px}
.dock-nav a{
  display:inline-flex;align-items:center;
  padding:9px 15px;border-radius:999px;
  font-size:14.5px;font-weight:500;color:var(--ink-soft);
  transition:background var(--ease),color var(--ease);
}
.dock-nav a:hover{background:var(--brand-soft);color:var(--brand-dark)}
.dock-nav a.active{background:var(--ink);color:#fff;font-weight:600}
.dock-cta{display:inline-flex;align-items:center;gap:6px}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:999px;border:1px solid var(--line);
  background:#fff;cursor:pointer;
}
.nav-toggle span{display:block;width:16px;height:2px;background:var(--ink);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:var(--ink);border-radius:2px;
  transition:transform var(--ease),top var(--ease);
}
.nav-toggle span::before{top:-5px}
.nav-toggle span::after{top:5px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--radius-s);
  font-size:15px;font-weight:700;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:background var(--ease),color var(--ease),transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px rgba(31,111,92,.26)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px);box-shadow:0 14px 30px rgba(31,111,92,.34)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-dark);background:#fff;transform:translateY(-2px)}
.btn-light{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.34)}
.btn-light:hover{background:rgba(255,255,255,.2);transform:translateY(-2px)}
.btn-white{background:#fff;color:var(--ink);box-shadow:0 10px 24px rgba(0,0,0,.18)}
.btn-white:hover{transform:translateY(-2px);background:#f3f6f2}
.btn-sm{padding:9px 16px;font-size:13.5px;border-radius:var(--radius-s)}
.btn .arrow{transition:transform var(--ease)}
.btn:hover .arrow{transform:translateX(3px)}

/* ---------- hero ---------- */
.cat-hero{
  position:relative;overflow:hidden;color:#fff;
  padding:56px 0 68px;
  background:
    linear-gradient(180deg,rgba(9,16,13,.88) 0%,rgba(9,16,13,.78) 46%,rgba(9,16,13,.92) 100%),
    url("/assets/images/backpic/back-3.webp") center/cover no-repeat;
}
.cat-hero::after{
  content:"";position:absolute;inset:auto 0 0 0;height:110px;
  background:linear-gradient(180deg,rgba(245,246,243,0) 0%,rgba(245,246,243,.12) 100%);
  pointer-events:none;
}
.hero-grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.12fr .88fr;gap:52px;align-items:start;
}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12.5px;color:rgba(255,255,255,.6);margin-bottom:22px}
.crumbs a{color:rgba(255,255,255,.78)}
.crumbs a:hover{color:#fff;text-decoration:underline}
.crumbs span.sep{opacity:.5}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:12.5px;font-weight:700;letter-spacing:.14em;
  color:#9ad9c5;text-transform:uppercase;
}
.hero-eyebrow::before{content:"";width:26px;height:2px;background:#9ad9c5;border-radius:2px}
.cat-hero h1{
  margin:16px 0 18px;
  font-size:clamp(30px,4.2vw,46px);
  line-height:1.2;letter-spacing:-.025em;color:#fff;
}
.hero-pain{
  display:inline-block;
  font-size:17px;font-weight:600;color:#fff;
  padding:2px 0;margin-bottom:14px;
  border-bottom:2px solid rgba(154,217,197,.55);
}
.hero-lead{font-size:15.5px;line-height:1.85;color:rgba(255,255,255,.72);max-width:600px;margin-bottom:26px}
.hero-tags{display:flex;flex-wrap:wrap;gap:9px}
.pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 15px;border-radius:999px;
  font-size:13px;font-weight:600;
  background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.2);
  color:rgba(255,255,255,.86);
}
.pill .dot{width:6px;height:6px;border-radius:50%;background:#7fd8bd}

/* ---------- ask card ---------- */
.ask-card{
  background:rgba(255,255,255,.97);
  color:var(--ink);
  border-radius:var(--radius-l);
  padding:26px 26px 24px;
  box-shadow:var(--shadow-lg);
  border:1px solid rgba(255,255,255,.5);
}
.ask-card h2{font-size:19px;line-height:1.4;letter-spacing:-.01em;margin-bottom:6px}
.ask-card .ask-note{font-size:13.5px;color:var(--muted);line-height:1.7;margin-bottom:18px}
.field{margin-bottom:14px}
.field label{display:block;font-size:12.5px;font-weight:700;letter-spacing:.06em;color:var(--ink-soft);margin-bottom:7px}
.field input,.field textarea{
  width:100%;padding:11px 13px;
  border:1px solid var(--line-strong);border-radius:var(--radius-s);
  background:#fbfcfa;color:var(--ink);font-size:14.5px;
  transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
}
.field input::placeholder,.field textarea::placeholder{color:#9aa49e}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);background:#fff;
  box-shadow:0 0 0 3px rgba(31,111,92,.13);
}
.field textarea{resize:vertical;min-height:78px;line-height:1.7}
.ask-card .btn{width:100%}
.ask-foot{font-size:12px;color:var(--muted);margin-top:12px;text-align:center}

/* ---------- sections ---------- */
.section{padding:76px 0}
.section-alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-dark{background:linear-gradient(160deg,var(--dark) 0%,var(--dark-2) 100%);color:#fff}
.section-head{max-width:760px;margin-bottom:42px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:700;letter-spacing:.14em;
  color:var(--brand);text-transform:uppercase;margin-bottom:12px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--brand);border-radius:2px}
.section-head.center .eyebrow{justify-content:center}
.section-head h2{font-size:clamp(23px,2.6vw,30px);line-height:1.32;letter-spacing:-.02em;margin-bottom:12px}
.section-head p{font-size:15px;color:var(--muted);line-height:1.85}
.section-dark .section-head h2{color:#fff}
.section-dark .section-head p{color:rgba(255,255,255,.68)}
.section-dark .eyebrow{color:#9ad9c5}
.section-dark .eyebrow::before{background:#9ad9c5}

/* ---------- term cards ---------- */
.term-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.term-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px 22px 22px;
  box-shadow:var(--shadow-s);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
  display:flex;flex-direction:column;
}
.term-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.term-icon{
  width:42px;height:42px;border-radius:12px;
  display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand-dark);
  margin-bottom:16px;
}
.term-icon svg{width:21px;height:21px}
.term-card h3{font-size:16.5px;line-height:1.45;margin-bottom:9px;letter-spacing:-.01em}
.term-card p{font-size:14px;line-height:1.78;color:var(--muted)}
.tagline{display:flex;flex-wrap:wrap;gap:6px;margin-top:16px}
.tag{
  display:inline-flex;align-items:center;
  padding:4px 10px;border-radius:999px;
  font-size:11.5px;font-weight:700;letter-spacing:.04em;
  background:var(--bg-alt);color:var(--ink-soft);
  border:1px solid var(--line);
}
.tag.tag-accent{background:rgba(194,161,92,.15);color:#8a6f2f;border-color:rgba(194,161,92,.35)}

/* ---------- compare ---------- */
.compare-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.compare-card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:24px;
  box-shadow:var(--shadow-s);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.compare-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.compare-title{
  display:flex;align-items:center;gap:10px;
  font-size:13px;font-weight:800;letter-spacing:.1em;color:var(--accent);
  text-transform:uppercase;margin-bottom:16px;
}
.compare-title::after{content:"";flex:1;height:1px;background:var(--line)}
.compare-side{padding:14px 0;border-bottom:1px dashed var(--line)}
.compare-side:last-child{border-bottom:none;padding-bottom:0}
.compare-side:first-of-type{padding-top:0}
.compare-side h4{font-size:15.5px;margin-bottom:6px;display:flex;align-items:center;gap:8px}
.compare-side h4 .badge{
  font-size:11px;font-weight:700;letter-spacing:.06em;
  padding:2px 8px;border-radius:6px;
  background:var(--brand-soft);color:var(--brand-dark);
}
.compare-side h4 .badge.badge-alt{background:rgba(194,161,92,.18);color:#87692b}
.compare-side p{font-size:14px;color:var(--muted);line-height:1.78}

/* ---------- flow ---------- */
.flow-wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.flow{position:relative}
.flow-step{
  position:relative;
  display:grid;grid-template-columns:52px 1fr;gap:18px;
  padding:0 0 28px;
}
.flow-step:last-child{padding-bottom:0}
.flow-step::before{
  content:"";position:absolute;left:25px;top:52px;bottom:6px;width:2px;
  background:linear-gradient(180deg,var(--line-strong) 0%,rgba(207,216,208,0) 100%);
}
.flow-step:last-child::before{display:none}
.flow-num{
  width:52px;height:52px;border-radius:16px;
  display:grid;place-items:center;
  background:var(--surface);border:1px solid var(--line-strong);
  color:var(--brand-dark);font-weight:800;font-size:16px;
  box-shadow:var(--shadow-s);
  transition:background var(--ease),color var(--ease),border-color var(--ease);
}
.flow-step:hover .flow-num{background:var(--brand);color:#fff;border-color:var(--brand)}
.flow-body h3{font-size:17px;margin-bottom:7px;line-height:1.45}
.flow-body p{font-size:14.5px;color:var(--muted);line-height:1.8}
.flow-figure{
  border-radius:var(--radius-l);overflow:hidden;
  box-shadow:var(--shadow);border:1px solid var(--line);
  background:var(--surface);
}
.flow-figure img{width:100%;height:340px;object-fit:cover}
.flow-figure figcaption{
  padding:14px 18px;font-size:13px;color:var(--muted);
  border-top:1px solid var(--line);background:#fff;
}

/* ---------- timeline ---------- */
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:tl}
.tl-item{
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.13);
  border-radius:var(--radius);
  padding:24px 20px;
  transition:background var(--ease),transform var(--ease),border-color var(--ease);
}
.tl-item:hover{background:rgba(255,255,255,.09);transform:translateY(-3px);border-color:rgba(154,217,197,.45)}
.tl-item .tl-index{
  display:inline-flex;align-items:center;justify-content:center;
  width:30px;height:30px;border-radius:9px;
  background:rgba(154,217,197,.16);color:#9ad9c5;
  font-size:13px;font-weight:800;margin-bottom:14px;
}
.tl-item h3{font-size:16px;color:#fff;margin-bottom:8px;line-height:1.45}
.tl-item p{font-size:13.8px;color:rgba(255,255,255,.66);line-height:1.78}

/* ---------- faq ---------- */
.faq-shell{display:grid;grid-template-columns:.72fr 1.28fr;gap:46px;align-items:start}
.faq-aside p{font-size:14.5px;color:var(--muted);line-height:1.85;margin-bottom:18px}
.faq-aside .aside-card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:20px;
  box-shadow:var(--shadow-s);
}
.faq-aside .aside-card h3{font-size:15px;margin-bottom:8px}
.faq-aside .aside-card p{font-size:13.5px;margin-bottom:0}
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-s);
  overflow:hidden;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.faq-item[open]{border-color:var(--line-strong);box-shadow:var(--shadow)}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
  padding:18px 20px;
  font-size:15.5px;font-weight:600;line-height:1.6;
  transition:color var(--ease),background var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand-dark);background:#fafbf9}
.faq-item summary .chev{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  display:grid;place-items:center;margin-top:1px;
  background:var(--bg-alt);color:var(--brand-dark);
  transition:transform var(--ease),background var(--ease);
}
.faq-item[open] summary .chev{transform:rotate(45deg);background:var(--brand);color:#fff}
.faq-item .faq-answer{
  padding:0 20px 20px;font-size:14.5px;color:var(--muted);line-height:1.85;
  border-top:1px dashed var(--line);
  padding-top:16px;
}

/* ---------- cta band ---------- */
.cta-band{
  background:linear-gradient(140deg,var(--brand-dark) 0%,#1c7f68 62%,#249076 100%);
  color:#fff;border-radius:var(--radius-l);
  padding:44px 44px;
  display:grid;grid-template-columns:1.3fr .7fr;gap:36px;align-items:center;
  box-shadow:0 26px 60px rgba(21,90,73,.28);
}
.cta-band h2{font-size:clamp(21px,2.4vw,27px);line-height:1.4;margin-bottom:12px;letter-spacing:-.015em}
.cta-band p{font-size:14.5px;color:rgba(255,255,255,.82);line-height:1.85;max-width:520px}
.cta-actions{display:flex;flex-direction:column;gap:12px}
.cta-actions .btn{width:100%}

/* ---------- sticky cta ---------- */
.sticky-cta{display:none}

/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:60px 0 26px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr .75fr .75fr;gap:44px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:800;color:#fff;margin-bottom:14px}
.footer-about{font-size:13.8px;line-height:1.85;color:rgba(255,255,255,.6);max-width:420px}
.footer-col h4{font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:rgba(255,255,255,.5);margin-bottom:16px;font-weight:700}
.footer-col a{display:block;font-size:14px;color:rgba(255,255,255,.74);padding:6px 0;transition:color var(--ease),transform var(--ease)}
.footer-col a:hover{color:#fff;transform:translateX(3px)}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;padding-top:22px;font-size:12.8px;color:rgba(255,255,255,.45)}
.footer-bottom .domain{letter-spacing:.04em}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .term-grid{grid-template-columns:repeat(2,1fr)}
  .timeline{grid-template-columns:repeat(2,1fr)}
  .faq-shell{grid-template-columns:1fr;gap:28px}
  .flow-wrap{grid-template-columns:1fr;gap:34px}
  .flow-figure img{height:280px}
  .cta-band{grid-template-columns:1fr;padding:36px 30px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:900px){
  .dock-nav{
    position:absolute;top:calc(100% + 10px);left:0;right:0;
    flex-direction:column;align-items:stretch;gap:4px;
    background:#fff;border:1px solid var(--line);
    border-radius:var(--radius);padding:10px;
    box-shadow:var(--shadow-lg);display:none;
  }
  .dock-nav.open{display:flex}
  .dock-nav a{padding:12px 14px;border-radius:var(--radius-s);font-size:15px}
  .nav-toggle{display:inline-flex}
  .dock-cta{display:none}
}
@media (max-width:768px){
  .container{width:calc(100% - 32px)}
  .section{padding:56px 0}
  .cat-hero{padding:40px 0 52px}
  .term-grid{grid-template-columns:1fr}
  .compare-grid{grid-template-columns:1fr}
  .timeline{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .ask-card{padding:22px}
  .faq-item summary{font-size:15px;padding:16px}
  .flow-figure img{height:230px}
  .sticky-cta{
    display:flex;align-items:center;justify-content:space-between;gap:14px;
    position:fixed;left:12px;right:12px;bottom:12px;z-index:80;
    background:rgba(12,20,17,.95);
    border:1px solid rgba(255,255,255,.14);
    border-radius:999px;
    padding:10px 12px 10px 18px;
    box-shadow:0 18px 40px rgba(0,0,0,.32);
    backdrop-filter:blur(10px);
    -webkit-backdrop-filter:blur(10px);
  }
  .sticky-cta span{font-size:13.5px;color:rgba(255,255,255,.82);line-height:1.4}
  body{padding-bottom:76px}
}
@media (max-width:520px){
  body{font-size:15px}
  .cat-hero h1{font-size:27px}
  .hero-pain{font-size:15.5px}
  .hero-lead{font-size:14.5px}
  .section-head h2{font-size:22px}
  .cta-band{padding:28px 22px;border-radius:var(--radius)}
  .btn{padding:12px 18px;font-size:14.5px}
  .brand{font-size:16px}
  .flow-step{grid-template-columns:44px 1fr;gap:14px}
  .flow-num{width:44px;height:44px;border-radius:13px;font-size:15px}
  .flow-step::before{left:21px;top:44px}
}

/* roulang page: category2 */
:root{
 --ink:#101713;
 --ink-soft:#2a3430;
 --muted:#68756e;
 --bg:#f5f6f3;
 --bg-alt:#ecefe9;
 --surface:#ffffff;
 --line:#e2e6e0;
 --line-strong:#cfd8d0;
 --brand:#1f6f5c;
 --brand-dark:#155a49;
 --brand-soft:#e4f1ec;
 --accent:#c2a15c;
 --dark:#0c1411;
 --dark-2:#132019;
 --radius-s:8px;
 --radius:14px;
 --radius-l:22px;
 --shadow-s:0 2px 8px rgba(16,23,19,.05);
 --shadow:0 12px 30px rgba(16,23,19,.08);
 --shadow-lg:0 24px 60px rgba(16,23,19,.16);
 --ease:.22s cubic-bezier(.4,0,.2,1);
 --container:1180px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
 margin:0;
 font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
 background:var(--bg);
 color:var(--ink);
 font-size:15.5px;
 line-height:1.78;
 -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.3}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
.container{width:min(var(--container),calc(100% - 48px));margin:0 auto}

/* ---------- header dock ---------- */
.site-header{
 position:sticky;top:0;z-index:90;
 padding:16px 0 10px;
 background:linear-gradient(180deg,rgba(245,246,243,.97) 0%,rgba(245,246,243,.78) 62%,rgba(245,246,243,0) 100%);
}
.site-header.is-scrolled .dock{box-shadow:0 16px 40px rgba(16,23,19,.15)}
.dock{
 position:relative;
 display:flex;align-items:center;justify-content:space-between;gap:18px;
 padding:10px 12px 10px 18px;
 border-radius:999px;
 background:rgba(255,255,255,.88);
 border:1px solid var(--line);
 box-shadow:0 10px 30px rgba(16,23,19,.08);
 backdrop-filter:blur(14px);
 -webkit-backdrop-filter:blur(14px);
 transition:box-shadow var(--ease);
}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
.brand-mark{
 width:32px;height:32px;border-radius:10px;display:grid;place-items:center;
 background:linear-gradient(140deg,var(--brand) 0%,#35937a 100%);
 color:#fff;font-size:14px;font-weight:800;letter-spacing:0;
 box-shadow:0 6px 14px rgba(31,111,92,.28);
}
.dock-nav{display:flex;align-items:center;gap:2px;flex:1;justify-content:center}
.dock-nav a{
 display:inline-flex;align-items:center;
 padding:9px 15px;border-radius:999px;
 font-size:14.5px;font-weight:500;color:var(--ink-soft);
 transition:background var(--ease),color var(--ease);
}
.dock-nav a:hover{background:var(--brand-soft);color:var(--brand-dark)}
.dock-nav a.active{background:var(--ink);color:#fff;font-weight:600}
.dock-nav a:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.dock-cta{display:inline-flex;align-items:center;gap:6px}
.nav-toggle{
 display:none;align-items:center;justify-content:center;
 width:44px;height:44px;border-radius:999px;border:1px solid var(--line);
 background:#fff;cursor:pointer;
}
.nav-toggle span{display:block;width:16px;height:2px;background:var(--ink);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{
 content:"";position:absolute;left:0;width:16px;height:2px;background:var(--ink);border-radius:2px;
 transition:transform var(--ease),top var(--ease);
}
.nav-toggle span::before{top:-5px}
.nav-toggle span::after{top:5px}

/* ---------- buttons ---------- */
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 padding:12px 24px;border-radius:var(--radius-s);
 font-size:15px;font-weight:700;letter-spacing:.01em;
 border:1px solid transparent;cursor:pointer;
 transition:background var(--ease),color var(--ease),transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:3px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px rgba(31,111,92,.26)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px);box-shadow:0 14px 30px rgba(31,111,92,.34)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-dark);background:#fff;transform:translateY(-2px)}
.btn-light{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.34)}
.btn-light:hover{background:rgba(255,255,255,.2);transform:translateY(-2px)}
.btn-white{background:#fff;color:var(--ink);box-shadow:0 10px 24px rgba(0,0,0,.18)}
.btn-white:hover{transform:translateY(-2px);background:#f3f6f2}
.btn-sm{padding:9px 16px;font-size:13.5px;border-radius:var(--radius-s)}
.btn .arrow{transition:transform var(--ease)}
.btn:hover .arrow{transform:translateX(3px)}

/* ---------- hero (category) ---------- */
.cat-hero{
 position:relative;overflow:hidden;color:#fff;
 padding:44px 0 74px;
 background:
  radial-gradient(900px 420px at 82% 8%,rgba(31,111,92,.42) 0%,rgba(31,111,92,0) 65%),
  linear-gradient(180deg,rgba(9,16,13,.9) 0%,rgba(9,16,13,.82) 48%,rgba(9,16,13,.94) 100%),
  url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
}
.cat-hero::after{
 content:"";position:absolute;left:0;right:0;bottom:0;height:110px;
 background:linear-gradient(180deg,rgba(245,246,243,0) 0%,rgba(245,246,243,.16) 100%);
 pointer-events:none;
}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.12fr .88fr;gap:52px;align-items:center}
.eyebrow{
 display:inline-flex;align-items:center;gap:9px;
 font-size:12.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
 color:var(--brand);
}
.eyebrow::before{content:"";width:26px;height:2px;background:currentColor;border-radius:2px}
.eyebrow.light{color:#9ad9c5}
.cat-hero h1{
 margin:16px 0 16px;
 font-size:clamp(30px,3.9vw,44px);
 line-height:1.2;letter-spacing:-.025em;color:#fff;
}
.hero-sub{font-size:16.5px;font-weight:600;color:rgba(255,255,255,.88);margin-bottom:14px}
.hero-lead{font-size:15.5px;line-height:1.85;color:rgba(255,255,255,.72);max-width:620px;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px}
.hero-tags{display:flex;flex-wrap:wrap;gap:9px}
.pill{
 display:inline-flex;align-items:center;gap:7px;
 padding:7px 15px;border-radius:999px;
 font-size:13px;font-weight:600;
 background:rgba(255,255,255,.1);
 border:1px solid rgba(255,255,255,.2);
 color:rgba(255,255,255,.88);
}
.pill .dot{width:6px;height:6px;border-radius:50%;background:#7fd8bd}

/* poster card */
.poster-card{
 position:relative;overflow:hidden;
 border-radius:var(--radius-l);
 border:1px solid rgba(255,255,255,.16);
 background:rgba(255,255,255,.06);
 box-shadow:var(--shadow-lg);
}
.poster-card>img{width:100%;height:250px;object-fit:cover}
.poster-card::after{
 content:"";position:absolute;left:0;right:0;top:0;height:250px;
 background:linear-gradient(180deg,rgba(12,20,17,.05) 0%,rgba(12,20,17,.72) 100%);
 pointer-events:none;
}
.poster-badge{
 position:absolute;top:16px;left:16px;z-index:3;
 display:inline-flex;align-items:center;gap:6px;
 padding:6px 13px;border-radius:999px;
 font-size:12.5px;font-weight:700;letter-spacing:.04em;
 background:#fff;color:var(--ink);
 box-shadow:0 8px 20px rgba(0,0,0,.24);
}
.poster-badge::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand)}
.poster-body{position:relative;z-index:3;padding:20px 22px 22px;margin-top:-58px}
.poster-body h2{font-size:19px;color:#fff;margin-bottom:8px}
.poster-body p{font-size:14px;color:rgba(255,255,255,.72);line-height:1.75}
.poster-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:18px;padding-top:16px;border-top:1px solid rgba(255,255,255,.14)}
.poster-stats li{display:flex;flex-direction:column;gap:2px}
.poster-stats strong{font-size:20px;color:#fff;font-weight:800;letter-spacing:-.02em}
.poster-stats span{font-size:12px;color:rgba(255,255,255,.58)}

/* ---------- sections ---------- */
.section{padding:76px 0}
.section-alt{background:var(--bg-alt)}
.section-dark{background:var(--dark);color:#fff}
.section-head{max-width:730px;margin-bottom:40px}
.section-head h2{font-size:clamp(23px,2.7vw,31px);margin:12px 0 12px}
.section-head p{color:var(--muted);font-size:15.5px}
.section-dark .section-head p{color:rgba(255,255,255,.68)}
.section-dark .eyebrow{color:#9ad9c5}

/* ---------- cards ---------- */
.card{
 background:var(--surface);
 border:1px solid var(--line);
 border-radius:var(--radius);
 box-shadow:var(--shadow-s);
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}

.feature-card{padding:28px 26px}
.icon-box{
 width:46px;height:46px;border-radius:13px;
 display:grid;place-items:center;
 background:var(--brand-soft);color:var(--brand-dark);
 margin-bottom:18px;
}
.icon-box svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.feature-card h3{font-size:17.5px;margin-bottom:10px}
.feature-card p{font-size:14.5px;color:var(--muted);line-height:1.78}
.tag{
 display:inline-flex;align-items:center;
 padding:4px 11px;border-radius:999px;
 background:var(--bg-alt);color:var(--ink-soft);
 font-size:12.5px;font-weight:600;letter-spacing:.01em;
}
.feature-card .tag{margin-top:16px}
.tag-accent{background:var(--brand-soft);color:var(--brand-dark)}

/* scene cards */
.scene-card{overflow:hidden;display:flex;flex-direction:column}
.scene-card img{width:100%;height:172px;object-fit:cover}
.scene-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.scene-body h3{font-size:16.5px}
.scene-body p{font-size:14px;color:var(--muted);line-height:1.75}
.scene-foot{margin-top:auto;padding-top:12px;display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--brand-dark);font-weight:700}
.scene-foot::before{content:"";width:16px;height:2px;background:var(--brand);border-radius:2px}

/* compare */
.compare{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch}
.compare-col{
 padding:26px 24px;border-radius:var(--radius);
 background:var(--surface);border:1px solid var(--line);
 box-shadow:var(--shadow-s);
 transition:transform var(--ease),box-shadow var(--ease);
}
.compare-col:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.compare-col.is-pick{background:var(--dark);color:#fff;border-color:var(--dark-2);box-shadow:var(--shadow)}
.compare-col.is-pick:hover{box-shadow:var(--shadow-lg)}
.compare-col h3{font-size:17px;margin-bottom:6px}
.compare-col .compare-sub{font-size:13px;color:var(--muted);margin-bottom:18px}
.compare-col.is-pick .compare-sub{color:rgba(255,255,255,.62)}
.compare-col.is-pick .tag{background:rgba(255,255,255,.14);color:#fff}
.compare-list li{
 display:flex;justify-content:space-between;gap:12px;
 padding:11px 0;border-bottom:1px dashed var(--line);
 font-size:14px;
}
.compare-col.is-pick .compare-list li{border-bottom-color:rgba(255,255,255,.14)}
.compare-list li:last-child{border-bottom:0}
.compare-list span:first-child{color:var(--muted)}
.compare-col.is-pick .compare-list span:first-child{color:rgba(255,255,255,.62)}
.compare-list span:last-child{font-weight:700}

/* stat band */
.stat-band{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:8px}
.stat-item{
 padding:24px 22px;border-radius:var(--radius);
 background:rgba(255,255,255,.06);
 border:1px solid rgba(255,255,255,.14);
 transition:background var(--ease),transform var(--ease);
}
.stat-item:hover{background:rgba(255,255,255,.1);transform:translateY(-3px)}
.stat-item strong{display:block;font-size:30px;font-weight:800;letter-spacing:-.03em;color:#fff}
.stat-item span{display:block;font-size:13.5px;color:rgba(255,255,255,.66);margin-top:4px}
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:26px}
.quote{
 padding:24px;border-radius:var(--radius);
 background:rgba(255,255,255,.05);
 border:1px solid rgba(255,255,255,.12);
}
.quote p{font-size:14.5px;line-height:1.8;color:rgba(255,255,255,.82)}
.quote footer{margin-top:16px;font-size:13px;color:rgba(255,255,255,.5);display:flex;align-items:center;gap:8px}
.quote footer::before{content:"";width:14px;height:2px;background:var(--accent);border-radius:2px}

/* syllabus list */
.syllabus{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.syllabus-item{
 display:flex;gap:16px;
 padding:20px 22px;border-radius:var(--radius);
 background:var(--surface);border:1px solid var(--line);
 box-shadow:var(--shadow-s);
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.syllabus-item:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.syllabus-num{
 flex:0 0 auto;width:38px;height:38px;border-radius:11px;
 display:grid;place-items:center;
 background:var(--brand-soft);color:var(--brand-dark);
 font-size:13.5px;font-weight:800;
}
.syllabus-item h3{font-size:15.5px;margin-bottom:6px}
.syllabus-item p{font-size:14px;color:var(--muted);line-height:1.72}

/* steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;counter-reset:step}
.step{
 position:relative;
 padding:28px 24px 26px;border-radius:var(--radius);
 background:var(--surface);border:1px solid var(--line);
 box-shadow:var(--shadow-s);
 transition:transform var(--ease),box-shadow var(--ease);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.step::before{
 counter-increment:step;content:"0" counter(step);
 display:block;font-size:13px;font-weight:800;letter-spacing:.14em;
 color:var(--brand);margin-bottom:14px;
}
.step h3{font-size:16.5px;margin-bottom:10px}
.step p{font-size:14px;color:var(--muted);line-height:1.76}

/* cms list */
.cms-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.cms-card{display:flex;flex-direction:column;overflow:hidden}
.cms-thumb{position:relative;overflow:hidden}
.cms-thumb img{width:100%;height:168px;object-fit:cover;transition:transform .4s ease}
.cms-card:hover .cms-thumb img{transform:scale(1.04)}
.cms-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.cms-body h3{font-size:16px;line-height:1.5}
.cms-body h3 a{transition:color var(--ease)}
.cms-body h3 a:hover{color:var(--brand-dark)}
.cms-body p{font-size:13.8px;color:var(--muted);line-height:1.72}
.cms-meta{display:flex;align-items:center;gap:12px;margin-top:auto;padding-top:12px;font-size:12.5px;color:var(--muted)}
.cms-meta .tag{padding:3px 10px}
.empty-tip{
 padding:34px;border-radius:var(--radius);text-align:center;
 background:var(--surface);border:1px dashed var(--line-strong);
 color:var(--muted);font-size:14.5px;
}

/* faq */
.faq-list{display:grid;gap:12px;max-width:860px}
.faq-item{
 background:var(--surface);border:1px solid var(--line);
 border-radius:var(--radius);box-shadow:var(--shadow-s);
 overflow:hidden;transition:border-color var(--ease),box-shadow var(--ease);
}
.faq-item:hover{border-color:var(--line-strong);box-shadow:var(--shadow)}
.faq-item[open]{border-color:var(--brand);box-shadow:var(--shadow)}
.faq-item summary{
 display:flex;align-items:center;justify-content:space-between;gap:16px;
 padding:19px 22px;cursor:pointer;list-style:none;
 font-size:15.5px;font-weight:700;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:focus-visible{outline:2px solid var(--brand);outline-offset:-4px}
.faq-icon{position:relative;flex:0 0 auto;width:22px;height:22px;border-radius:50%;background:var(--brand-soft)}
.faq-icon::before,.faq-icon::after{
 content:"";position:absolute;top:50%;left:50%;width:10px;height:2px;border-radius:2px;
 background:var(--brand-dark);transform:translate(-50%,-50%);transition:transform var(--ease);
}
.faq-icon::after{transform:translate(-50%,-50%) rotate(90deg)}
.faq-item[open] .faq-icon::after{transform:translate(-50%,-50%) rotate(0)}
.faq-answer{padding:0 22px 22px;font-size:14.5px;color:var(--muted);line-height:1.82;max-width:720px}

/* cta panel */
.cta-panel{
 position:relative;overflow:hidden;
 display:grid;grid-template-columns:1.4fr .6fr;gap:32px;align-items:center;
 padding:44px 46px;border-radius:var(--radius-l);
 background:
  radial-gradient(560px 280px at 88% 12%,rgba(31,111,92,.55) 0%,rgba(31,111,92,0) 70%),
  linear-gradient(140deg,var(--dark) 0%,var(--dark-2) 100%);
 color:#fff;box-shadow:var(--shadow-lg);
}
.cta-panel h2{font-size:clamp(22px,2.6vw,29px);color:#fff;margin-bottom:12px}
.cta-panel p{font-size:14.8px;color:rgba(255,255,255,.72);line-height:1.8;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end}

/* footer */
.site-footer{background:var(--dark);color:#fff;padding:64px 0 30px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:44px;padding-bottom:38px;border-bottom:1px solid rgba(255,255,255,.12)}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:800;color:#fff;margin-bottom:16px}
.footer-about{font-size:14px;color:rgba(255,255,255,.6);line-height:1.82;max-width:400px}
.footer-col h4{font-size:14px;font-weight:700;letter-spacing:.05em;color:#fff;margin:0 0 16px}
.footer-col a{display:block;padding:6px 0;font-size:14px;color:rgba(255,255,255,.62);transition:color var(--ease),transform var(--ease)}
.footer-col a:hover{color:#fff;transform:translateX(3px)}
.footer-bottom{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;padding-top:22px;font-size:13px;color:rgba(255,255,255,.45)}
.footer-bottom .domain{letter-spacing:.02em}

/* sticky bottom cta */
.sticky-cta{
 position:fixed;left:0;right:0;bottom:0;z-index:80;
 display:none;align-items:center;justify-content:space-between;gap:14px;
 padding:12px 18px;
 background:rgba(255,255,255,.96);
 border-top:1px solid var(--line);
 box-shadow:0 -10px 30px rgba(16,23,19,.12);
 backdrop-filter:blur(12px);
 -webkit-backdrop-filter:blur(12px);
}
.sticky-cta span{font-size:13.5px;font-weight:700;color:var(--ink)}

/* ---------- responsive ---------- */
@media (max-width:1024px){
 .hero-grid{grid-template-columns:1fr;gap:36px}
 .poster-card>img,.poster-card::after{height:230px}
 .poster-body{margin-top:-52px}
 .grid-3,.grid-4,.cms-grid,.quote-grid,.steps{grid-template-columns:repeat(2,1fr)}
 .compare{grid-template-columns:1fr}
 .syllabus{grid-template-columns:1fr}
 .stat-band{grid-template-columns:repeat(2,1fr)}
 .cta-panel{grid-template-columns:1fr;padding:38px 32px}
 .cta-actions{justify-content:flex-start}
 .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:900px){
 .nav-toggle{display:inline-flex}
 .dock-nav{
  position:absolute;top:calc(100% + 10px);left:0;right:0;
  flex-direction:column;align-items:stretch;gap:4px;
  padding:12px;border-radius:18px;
  background:#fff;border:1px solid var(--line);
  box-shadow:var(--shadow);display:none;
 }
 .dock-nav.is-open{display:flex}
 .dock-nav a{padding:12px 14px;border-radius:12px;font-size:15px;min-height:44px}
 .dock-cta{display:none}
 .section{padding:60px 0}
 .cat-hero{padding:34px 0 58px}
}
@media (max-width:768px){
 .grid-3,.grid-4,.grid-2,.cms-grid,.quote-grid,.steps{grid-template-columns:1fr}
 .stat-band{grid-template-columns:1fr 1fr}
 .site-footer{padding:52px 0 90px}
 .footer-grid{grid-template-columns:1fr}
 .sticky-cta{display:flex}
 .hero-actions .btn{flex:1 1 auto}
}
@media (max-width:520px){
 .container{width:calc(100% - 32px)}
 .cat-hero h1{font-size:26px}
 .hero-sub{font-size:15px}
 .hero-lead{font-size:14.5px}
 .poster-card>img,.poster-card::after{height:190px}
 .poster-body h2{font-size:17px}
 .poster-stats strong{font-size:17px}
 .stat-band{grid-template-columns:1fr}
 .feature-card,.step,.compare-col{padding:22px 18px}
 .cta-panel{padding:30px 22px}
 .btn{padding:11px 18px;font-size:14.5px;min-height:44px}
 .section-head h2{font-size:22px}
}