/* roulang page: index */
:root{
  --ink:#102A2A;
  --ink-deep:#0B1F1F;
  --ink-soft:#1B403C;
  --cyan:#1FAF9F;
  --cyan-light:#7BE0D4;
  --amber:#F5A524;
  --coral:#FF6B4A;
  --bg:#F7F6F2;
  --card:#FFFFFF;
  --line:#E4E1D8;
  --text:#101615;
  --muted:#5B6663;
  --ok:#1F9D6A;
  --radius-lg:24px;
  --radius-md:18px;
  --radius-sm:12px;
  --shadow-1:0 2px 6px rgba(16,42,42,.05), 0 12px 28px -18px rgba(16,42,42,.28);
  --shadow-2:0 6px 16px rgba(16,42,42,.08), 0 22px 44px -22px rgba(16,42,42,.38);
  --sec:96px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:17px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  padding-top:72px;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--ink);text-decoration:none;transition:color .22s ease, background-color .22s ease}
a:hover{color:var(--cyan)}
h1,h2,h3,h4{font-weight:800;letter-spacing:-.015em;color:var(--ink);line-height:1.28;margin:0}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button,input{font-family:inherit}
:focus-visible{outline:3px solid rgba(31,175,159,.55);outline-offset:2px;border-radius:6px}
.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
.sec{padding:var(--sec) 0}
.sec-tight{padding:72px 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  color:#0F6F66;background:#E4F6F3;border-radius:999px;padding:6px 14px;margin-bottom:18px;
}
.sec-head{max-width:760px;margin-bottom:48px}
.sec-head h2{font-size:clamp(1.6rem,3vw,2.4rem);margin-bottom:14px}
.sec-head p{color:var(--muted);font-size:17px}
.mono{font-family:"Inter","DIN Alternate",ui-monospace,SFMono-Regular,Menlo,monospace;font-variant-numeric:tabular-nums}

/* ============ header ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;height:72px;z-index:1040;
  background:rgba(247,246,242,.94);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-inner{height:72px;display:flex;align-items:center;gap:20px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand-mark{
  width:38px;height:38px;border-radius:13px;flex-shrink:0;
  background:linear-gradient(140deg,var(--ink) 0%,#1c5049 100%);
  display:grid;place-items:center;color:var(--cyan-light);font-size:16px;
  box-shadow:0 6px 16px -8px rgba(16,42,42,.7);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:17.5px;font-weight:800;color:var(--ink);letter-spacing:-.02em}
.brand-text span{font-size:11.5px;color:var(--muted);letter-spacing:.14em;font-weight:600}
.nav-menu{display:flex;align-items:center;gap:4px;margin-left:18px}
.nav-item{
  position:relative;display:inline-block;padding:9px 15px;border-radius:10px;
  font-size:15.5px;font-weight:600;color:var(--muted);white-space:nowrap;
}
.nav-item:hover{color:var(--ink);background:rgba(31,175,159,.09)}
.nav-item.active{color:var(--ink)}
.nav-item.active::after{
  content:"";position:absolute;left:15px;right:15px;bottom:3px;height:2px;
  border-radius:2px;background:var(--cyan);
}
.nav-side{margin-left:auto;display:flex;align-items:center;gap:12px}
.countdown-pill{
  display:flex;align-items:center;gap:8px;padding:7px 14px;border-radius:999px;
  border:1px solid var(--line);background:#fff;font-size:13.5px;color:var(--muted);font-weight:600;
}
.countdown-pill b{color:var(--ink);font-size:14.5px;font-weight:700;letter-spacing:.02em}
.countdown-pill i{color:var(--cyan);font-size:12px}
.status-chip{
  display:inline-flex;align-items:center;gap:7px;padding:7px 14px;border-radius:999px;
  background:#E4F6F3;color:#0F6F66;font-size:13.5px;font-weight:700;
}
.status-chip .dot{width:7px;height:7px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 4px rgba(31,157,106,.16)}
.btn-cta{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--amber);color:#14231F;border:none;
  font-weight:700;font-size:15px;padding:11px 20px;border-radius:999px;
  box-shadow:0 10px 22px -12px rgba(245,165,36,.95);
  transition:transform .2s ease, box-shadow .2s ease, background-color .2s ease;
}
.btn-cta:hover{background:#FFB43C;color:#14231F;transform:translateY(-2px);box-shadow:0 16px 28px -14px rgba(245,165,36,1)}
.btn-cta i{transition:transform .2s ease}
.btn-cta:hover i{transform:translateX(4px)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:#fff;color:var(--ink);font-size:18px;place-items:center;cursor:pointer;
}
.offcanvas{background:var(--ink-deep);color:#EAEFEC}
.offcanvas-header{border-bottom:1px solid rgba(255,255,255,.1);padding:20px 22px}
.offcanvas-title{color:#fff;font-weight:800;font-size:17px}
.offcanvas-body{padding:14px 12px 24px;display:flex;flex-direction:column}
.oc-link{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 14px;border-radius:14px;color:#D8E3DF;font-size:19px;font-weight:700;
}
.oc-link:hover{background:rgba(255,255,255,.08);color:#fff}
.oc-link.active{color:var(--cyan-light)}
.oc-cta{margin-top:auto;padding:14px}
.btn-close-custom{filter:invert(1) grayscale(1) brightness(2)}

/* ============ buttons ============ */
.btn-main,.btn-line,.btn-soft{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-weight:700;font-size:16px;padding:14px 26px;border-radius:var(--radius-sm);
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease, box-shadow .2s ease, background-color .2s ease, color .2s ease, border-color .2s ease;
}
.btn-main{background:var(--ink);color:#F4F7F5;box-shadow:0 12px 26px -16px rgba(16,42,42,.95)}
.btn-main:hover{background:var(--ink-soft);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-2)}
.btn-main i,.btn-line i{transition:transform .2s ease}
.btn-main:hover i,.btn-line:hover i{transform:translateX(4px)}
.btn-line{background:transparent;color:var(--ink);border-color:rgba(16,42,42,.28)}
.btn-line:hover{background:var(--ink);color:#fff;border-color:var(--ink);transform:translateY(-2px)}
.btn-line-light{background:transparent;color:#EAF3F1;border-color:rgba(255,255,255,.4)}
.btn-line-light:hover{background:#fff;color:var(--ink);border-color:#fff;transform:translateY(-2px)}
.btn-amber{background:var(--amber);color:#14231F;box-shadow:0 12px 26px -14px rgba(245,165,36,.9)}
.btn-amber:hover{background:#FFB43C;color:#14231F;transform:translateY(-2px);box-shadow:var(--shadow-2)}
.btn-lg-x{padding:17px 32px;font-size:17.5px;border-radius:16px}
.btn-main:active,.btn-line:active,.btn-cta:active,.btn-amber:active{transform:translateY(0)}

/* ============ hero ============ */
.hero{
  position:relative;overflow:hidden;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  padding:88px 0 92px;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(102deg,rgba(11,31,31,.97) 0%,rgba(16,42,42,.9) 46%,rgba(16,42,42,.6) 100%);
}
.hero::after{
  content:"";position:absolute;inset:0;opacity:.07;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.5) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:64px 64px;
}
.hero .wrap{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:56px;align-items:center}
.hero-tag{
  display:inline-flex;align-items:center;gap:9px;padding:7px 15px;border-radius:999px;
  background:rgba(123,224,212,.14);border:1px solid rgba(123,224,212,.35);
  color:var(--cyan-light);font-size:13.5px;font-weight:700;margin-bottom:22px;
}
.hero h1{
  color:#fff;font-size:clamp(2rem,4.4vw,3.5rem);line-height:1.22;letter-spacing:-.03em;
  margin-bottom:20px;
}
.hero h1 em{font-style:normal;color:var(--cyan-light)}
.hero-sub{color:#BCD3CE;font-size:18.5px;line-height:1.85;max-width:560px;margin-bottom:30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:36px}
.hero-actions .btn-main{background:var(--amber);color:#14231F;box-shadow:0 14px 30px -16px rgba(245,165,36,.95)}
.hero-actions .btn-main:hover{background:#FFB43C;color:#14231F}
.hero-kpis{display:flex;flex-wrap:wrap;gap:14px}
.kpi{
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);
  border-radius:16px;padding:14px 20px;min-width:150px;
}
.kpi b{display:block;color:#fff;font-size:20px;font-weight:800;letter-spacing:-.01em}
.kpi span{color:#9DBBB5;font-size:13px;font-weight:600}
.hero-visual{position:relative}
.device-frame{
  border-radius:26px;overflow:hidden;border:1px solid rgba(255,255,255,.2);
  background:rgba(255,255,255,.06);
  padding:12px;box-shadow:0 40px 80px -40px rgba(0,0,0,.85);
}
.device-frame img{border-radius:18px;width:100%}
.hero-badge{
  position:absolute;left:-18px;bottom:28px;
  background:#fff;border-radius:16px;padding:13px 18px;box-shadow:var(--shadow-2);
  display:flex;align-items:center;gap:11px;
}
.hero-badge i{color:var(--cyan);font-size:19px}
.hero-badge b{display:block;font-size:14.5px;color:var(--ink);font-weight:800;line-height:1.3}
.hero-badge span{font-size:12.5px;color:var(--muted)}

/* ============ value ============ */
.value-row{
  display:grid;grid-template-columns:88px 1fr auto;gap:26px;align-items:center;
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:28px 32px;margin-bottom:18px;
  transition:transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.value-row:hover{transform:translateY(-4px);border-color:var(--cyan);box-shadow:var(--shadow-2)}
.value-num{
  font-family:"Inter","DIN Alternate",monospace;font-size:30px;font-weight:800;
  color:var(--cyan);letter-spacing:-.03em;line-height:1;
}
.value-row h3{font-size:1.25rem;margin-bottom:8px}
.value-row p{color:var(--muted);font-size:16.5px;max-width:720px}
.value-icon{
  width:54px;height:54px;border-radius:16px;display:grid;place-items:center;
  background:#EDF8F6;color:#0F6F66;font-size:20px;flex-shrink:0;
}
.value-row:nth-child(even) .value-icon{background:#FDF3E2;color:#B0741A}
.value-tag{
  display:inline-block;margin-top:12px;font-size:13px;font-weight:700;
  color:#0F6F66;background:#E4F6F3;border-radius:999px;padding:4px 12px;
}

/* ============ carousel ============ */
.shots{background:#0B1F1F;color:#E7EFEC;padding:var(--sec) 0}
.shots .eyebrow{background:rgba(123,224,212,.14);color:var(--cyan-light)}
.shots .sec-head h2{color:#fff}
.shots .sec-head p{color:#9DBBB5}
.shot-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.shot-card{
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.13);
  border-radius:var(--radius-md);padding:12px;
  transition:transform .25s ease, border-color .25s ease;
}
.shot-card:hover{transform:translateY(-4px);border-color:var(--cyan-light)}
.shot-card img{border-radius:12px;width:100%;aspect-ratio:16/10;object-fit:cover}
.shot-card figcaption{color:#CFE0DB;font-size:15px;font-weight:700;padding:13px 6px 5px}
.shot-card small{display:block;color:#8FA9A3;font-size:13px;font-weight:600;padding:0 6px}
#shotsCarousel .carousel-indicators{position:static;margin:34px 0 0}
#shotsCarousel .carousel-indicators [data-bs-target]{
  width:34px;height:3px;border-radius:3px;background:rgba(255,255,255,.28);
  border:none;opacity:1;margin:0 5px;
}
#shotsCarousel .carousel-indicators .active{background:var(--cyan-light)}
.carousel-ctrl{
  width:46px;height:46px;border-radius:50%;background:var(--ink);color:#fff;
  display:grid;place-items:center;opacity:.92;border:1px solid rgba(255,255,255,.16);
  transition:background-color .2s ease, transform .2s ease;
}
.carousel-ctrl:hover{background:var(--cyan);color:#06201D;transform:scale(1.06)}
.carousel-control-prev,.carousel-control-next{width:auto;opacity:1}

/* ============ system ============ */
.sys-tabs{border-bottom:1px solid var(--line);gap:6px;flex-wrap:wrap}
.sys-tabs .nav-link{
  border:none;border-radius:12px 12px 0 0;color:var(--muted);font-weight:700;
  font-size:15.5px;padding:12px 22px;background:transparent;
}
.sys-tabs .nav-link:hover{color:var(--ink);background:rgba(31,175,159,.08)}
.sys-tabs .nav-link.active{
  color:var(--ink);background:#fff;border:1px solid var(--line);border-bottom-color:#fff;
  margin-bottom:-1px;
}
.sys-panel{
  background:#fff;border:1px solid var(--line);border-top:none;
  border-radius:0 0 var(--radius-lg) var(--radius-lg);padding:34px 34px 30px;
}
.spec-list{display:grid;grid-template-columns:repeat(2,1fr);gap:0 40px}
.spec-list div{
  display:flex;justify-content:space-between;gap:16px;
  padding:14px 0;border-bottom:1px dashed var(--line);font-size:16px;
}
.spec-list dt{color:var(--muted);font-weight:600;margin:0}
.spec-list dd{color:var(--ink);font-weight:700;margin:0;text-align:right}
.sys-note{
  margin-top:26px;background:#EDF8F6;border-radius:var(--radius-sm);
  padding:16px 20px;color:#0F6F66;font-size:15.5px;font-weight:600;
  display:flex;gap:10px;align-items:flex-start;
}
.sys-note i{margin-top:4px}

/* ============ reviews ============ */
.review-wall{columns:3;column-gap:22px}
.review-card{
  break-inside:avoid;background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);
  padding:24px;margin-bottom:22px;
  transition:transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.review-card:hover{transform:translateY(-4px);border-color:var(--cyan);box-shadow:var(--shadow-2)}
.review-top{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.avatar{
  width:44px;height:44px;border-radius:50%;flex-shrink:0;
  display:grid;place-items:center;font-weight:800;font-size:16px;color:#0B2B28;
  background:linear-gradient(140deg,var(--cyan-light),#BFF0E9);
}
.avatar.alt{background:linear-gradient(140deg,#FBD79A,#F5A524);color:#4A2E00}
.avatar.alt2{background:linear-gradient(140deg,#FFC5B5,#FF6B4A);color:#5A1C0C}
.review-top b{display:block;font-size:15.5px;color:var(--ink);font-weight:800}
.review-top span{font-size:12.5px;color:var(--muted)}
.stars{color:var(--amber);font-size:13.5px;letter-spacing:2px;margin-bottom:10px}
.review-card p{font-size:16px;color:#26302E;line-height:1.8}
.review-meta{margin-top:14px;font-size:13px;color:var(--muted);font-weight:600}

/* ============ download ============ */
.dl{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.dl-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.dl-main{
  border:1px solid var(--line);border-radius:var(--radius-lg);padding:34px;
  background:linear-gradient(160deg,#FCFCFA 0%,#F2F7F5 100%);
}
.dl-version{display:flex;flex-wrap:wrap;gap:26px;margin:22px 0 26px}
.dl-version div b{display:block;font-size:17px;font-weight:800;color:var(--ink)}
.dl-version div span{font-size:13px;color:var(--muted);font-weight:600}
.dl-buttons{display:flex;flex-wrap:wrap;gap:12px}
.btn-plat{
  display:inline-flex;align-items:center;gap:10px;padding:13px 20px;border-radius:14px;
  background:#fff;border:1px solid var(--line);font-weight:700;font-size:15.5px;color:var(--ink);
}
.btn-plat:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-3px);box-shadow:var(--shadow-1)}
.btn-plat i{font-size:17px}
.verify{
  margin-top:26px;display:flex;flex-wrap:wrap;gap:12px;font-size:13.5px;font-weight:700;color:#0F6F66;
}
.verify span{background:#E4F6F3;border-radius:999px;padding:6px 14px;display:inline-flex;align-items:center;gap:7px}
.qr-box{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:30px;text-align:center;
}
.qr-img{
  width:180px;height:180px;margin:0 auto 18px;border-radius:18px;
  background:
    repeating-linear-gradient(90deg,var(--ink) 0 8px,transparent 8px 16px),
    repeating-linear-gradient(0deg,rgba(16,42,42,.16) 0 8px,transparent 8px 16px),
    #F2F7F5;
  border:1px solid var(--line);
  display:grid;place-items:center;
}
.qr-img i{font-size:40px;color:var(--ink);background:#fff;border-radius:12px;padding:10px}
.qr-box b{display:block;font-size:16px;color:var(--ink);font-weight:800;margin-bottom:6px}
.qr-box p{color:var(--muted);font-size:14.5px}

/* ============ news ============ */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);
  padding:26px;display:flex;flex-direction:column;gap:12px;
  transition:transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.news-card:hover{transform:translateY(-4px);border-color:var(--cyan);box-shadow:var(--shadow-2)}
.news-card--lead{grid-column:span 2;flex-direction:row;gap:26px;align-items:center;padding:22px}
.news-card--lead .thumb{width:46%;flex-shrink:0}
.news-card--lead .body{flex:1}
.thumb{border-radius:14px;overflow:hidden;background:#EDF1EE}
.thumb img{width:100%;aspect-ratio:16/10;object-fit:cover}
.news-meta{display:flex;align-items:center;gap:12px;font-size:13px;font-weight:700}
.chip-cat{background:#EDF8F6;color:#0F6F66;border-radius:999px;padding:4px 12px}
.news-meta time{color:var(--muted);font-weight:600}
.news-card h3{font-size:1.25rem;line-height:1.45}
.news-card h3 a{color:var(--ink)}
.news-card h3 a:hover{color:var(--cyan)}
.news-card p{color:var(--muted);font-size:16px}
.news-more{display:inline-flex;align-items:center;gap:7px;font-weight:700;color:var(--ink);font-size:15.5px}
.news-more i{transition:transform .2s ease}
.news-more:hover i{transform:translateX(4px)}
.news-empty{
  grid-column:1/-1;border:1.5px dashed var(--line);border-radius:var(--radius-md);
  padding:56px 24px;text-align:center;color:var(--muted);background:#fff;
}
.news-empty i{font-size:34px;color:var(--cyan);display:block;margin-bottom:14px}
.news-empty b{display:block;font-size:17px;color:var(--ink);font-weight:800;margin-bottom:6px}
.sec-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}

/* ============ faq ============ */
.accordion-item{
  border:1px solid var(--line);border-radius:var(--radius-md) !important;
  overflow:hidden;margin-bottom:14px;background:#fff;
}
.accordion-button{
  font-weight:700;font-size:17px;color:var(--ink);padding:20px 24px;background:#fff;
  box-shadow:none !important;
}
.accordion-button:not(.collapsed){color:var(--ink);background:#F3FAF8}
.accordion-button::after{
  background-image:none;content:"\f078";font-family:"Font Awesome 6 Free";font-weight:900;
  font-size:13px;color:var(--cyan);width:auto;height:auto;transition:transform .25s ease;
}
.accordion-button:not(.collapsed)::after{transform:rotate(180deg)}
.accordion-body{padding:6px 24px 24px;color:var(--muted);font-size:16.5px;line-height:1.9}

/* ============ cta ============ */
.final-cta{
  position:relative;overflow:hidden;border-radius:var(--radius-lg);
  background-image:url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;
  padding:66px 56px;
}
.final-cta::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(11,31,31,.96),rgba(23,79,72,.82));
}
.final-cta > *{position:relative;z-index:2}
.final-cta h2{color:#fff;font-size:clamp(1.6rem,3vw,2.3rem);margin-bottom:14px}
.final-cta p{color:#BCD3CE;max-width:640px;margin-bottom:28px}
.final-cta .acts{display:flex;flex-wrap:wrap;gap:14px}

/* ============ footer ============ */
.site-footer{background:var(--ink-deep);color:#AFC2BD;padding:72px 0 0;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.site-footer h4{color:#fff;font-size:16px;margin-bottom:18px;font-weight:800}
.site-footer p{font-size:15px;line-height:1.9;color:#9DB0AC}
.foot-brand{display:flex;align-items:center;gap:11px;margin-bottom:18px}
.foot-brand .brand-mark{background:linear-gradient(140deg,#17423C,#0F2E2A)}
.foot-brand b{color:#fff;font-size:17.5px;font-weight:800}
.foot-list li{margin-bottom:11px}
.foot-list a{color:#AFC2BD;font-size:15px}
.foot-list a:hover{color:var(--cyan-light)}
.foot-list i{color:var(--cyan);margin-right:8px;font-size:13px}
.foot-rule{border-top:1px solid rgba(255,255,255,.1);padding:22px 0;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13.5px;color:#8298 94}
.foot-rule{color:#829894}
.foot-rule a{color:#AFC2BD}
.foot-rule a:hover{color:var(--cyan-light)}

/* ============ animation ============ */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease, transform .7s ease}
.reveal.is-in{opacity:1;transform:none}
.hero-anim{opacity:0;transform:translateY(26px);animation:heroUp .9s cubic-bezier(.22,.8,.3,1) forwards}
.hero-anim:nth-child(2){animation-delay:.1s}
.hero-anim:nth-child(3){animation-delay:.2s}
.hero-anim:nth-child(4){animation-delay:.3s}
.hero-anim:nth-child(5){animation-delay:.4s}
@keyframes heroUp{to{opacity:1;transform:none}}
#cdSec{animation:pulseNum 1s ease-in-out infinite}
@keyframes pulseNum{0%,100%{opacity:1}50%{opacity:.55}}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  .reveal{opacity:1;transform:none}
  .hero-anim{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* ============ responsive ============ */
@media (max-width:1199px){
  .wrap{max-width:1140px}
  .review-wall{columns:2}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .news-card--lead{grid-column:span 2}
}
@media (max-width:991px){
  :root{--sec:72px}
  body{padding-top:60px}
  .site-header{height:60px}
  .nav-inner{height:60px}
  .nav-menu,.countdown-pill,.status-chip{display:none}
  .nav-toggle{display:grid}
  .hero{padding:64px 0 70px}
  .hero-grid{grid-template-columns:1fr;gap:38px}
  .hero-visual{order:2}
  .hero-badge{left:8px;bottom:12px}
  .value-row{grid-template-columns:64px 1fr;gap:18px;padding:24px}
  .value-icon{display:none}
  .shot-grid{grid-template-columns:repeat(2,1fr)}
  .shot-grid > *:nth-child(3){display:none}
  .spec-list{grid-template-columns:1fr;gap:0}
  .dl-grid{grid-template-columns:1fr;gap:30px}
  .news-grid{grid-template-columns:1fr}
  .news-card--lead{grid-column:span 1;flex-direction:column;align-items:stretch}
  .news-card--lead .thumb{width:100%}
  .foot-grid{grid-template-columns:1fr 1fr;gap:34px}
  .final-cta{padding:48px 32px}
}
@media (max-width:767px){
  body{font-size:16.5px}
  :root{--sec:56px}
  .wrap{padding:0 18px}
  .hero h1{font-size:clamp(1.8rem,7.6vw,2.3rem)}
  .hero-sub{font-size:16.5px}
  .hero-actions .btn-main,.hero-actions .btn-line{width:100%}
  .kpi{flex:1 1 44%;min-width:0;padding:12px 14px}
  .shot-grid{grid-template-columns:1fr}
  .shot-grid > *:nth-child(2),.shot-grid > *:nth-child(3){display:none}
  .review-wall{columns:1}
  .sys-panel{padding:24px 20px}
  .accordion-button{font-size:16px;padding:17px 18px}
  .accordion-body{padding:4px 18px 20px}
  .foot-grid{grid-template-columns:1fr}
  .final-cta{padding:40px 22px}
  .final-cta .acts .btn-main,.final-cta .acts .btn-line-light{width:100%}
  .sec-head{margin-bottom:32px}
  .value-row{padding:20px 18px}
  .value-num{font-size:24px}
  .dl-main{padding:24px 20px}
}
@media (max-width:520px){
  .brand-text b{font-size:15.5px}
  .brand-text span{display:none}
  .hero .btn-main,.hero .btn-line{font-size:15.5px;padding:13px 20px}
  .qr-img{width:150px;height:150px}
}

/* roulang page: category1 */
:root{
  --ink:#102A2A;
  --ink-deep:#0B1F1F;
  --cyan:#1FAF9F;
  --cyan-light:#7BE0D4;
  --amber:#F5A524;
  --coral:#FF6B4A;
  --bg:#F7F6F2;
  --card:#FFFFFF;
  --line:#E4E1D8;
  --text:#101615;
  --muted:#5B6663;
  --ok:#1F9D6A;
  --warn:#D97706;
  --r-lg:24px;
  --r-md:18px;
  --r-sm:12px;
  --sh:0 14px 34px rgba(16,42,42,.08);
  --sh-hover:0 22px 46px rgba(16,42,42,.16);
  --sec:96px;
  --wrap:1240px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--ink);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--cyan)}
h1,h2,h3,h4{color:var(--ink);font-weight:800;letter-spacing:-.01em;margin:0}
h1{font-size:clamp(2.4rem,4.2vw,4.2rem);line-height:1.16}
h2{font-size:clamp(1.6rem,2.6vw,2.4rem);line-height:1.28}
h3{font-size:1.25rem;line-height:1.4}
p{margin:0 0 1rem}
ul{padding-left:1.1rem;margin:0}
:focus-visible{outline:3px solid var(--cyan-light);outline-offset:2px;border-radius:6px}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 20px}
.section{padding:var(--sec) 0}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:820px;margin-bottom:44px}
.sec-head p{color:var(--muted);margin:.6rem 0 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.82rem;font-weight:700;letter-spacing:.12em;
  color:#0d6d63;background:rgba(31,175,159,.12);
  border:1px solid rgba(31,175,159,.26);
  padding:6px 14px;border-radius:999px;margin-bottom:18px;text-transform:uppercase;
}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(247,246,242,.94);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:26px;height:72px}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-mark{
  width:42px;height:42px;border-radius:13px;
  display:grid;place-items:center;color:#fff;font-size:1.05rem;
  background:linear-gradient(140deg,var(--ink) 0%,#16403C 60%,var(--cyan) 100%);
  box-shadow:0 10px 22px rgba(16,42,42,.22);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text b{font-size:1.06rem;color:var(--ink);font-weight:800}
.brand-text em{font-style:normal;font-size:.74rem;color:var(--muted);letter-spacing:.04em}
.nav-menu{display:flex;align-items:center;gap:6px;margin-left:8px}
.nav-item{
  position:relative;padding:9px 14px;border-radius:10px;
  font-weight:600;font-size:.96rem;color:#2A3A38;
}
.nav-item:hover{background:#fff;color:var(--ink)}
.nav-item.active{color:#0d6d63}
.nav-item.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:3px;
  border-radius:3px;background:var(--cyan);
}
.header-side{display:flex;align-items:center;gap:12px;margin-left:auto}
.count-pill{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.82rem;font-weight:600;color:var(--ink);
  border:1px solid var(--line);background:#fff;
  padding:7px 13px;border-radius:999px;
}
.count-pill i{color:var(--cyan)}
.count-pill b{font-family:Inter,"DIN Alternate",Consolas,monospace;font-variant-numeric:tabular-nums;letter-spacing:.06em}
.status-tag{
  font-size:.8rem;font-weight:700;color:#0d6d63;
  background:rgba(31,175,159,.13);border:1px solid rgba(31,175,159,.24);
  padding:6px 12px;border-radius:999px;
}
.btn-cta{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--amber);color:var(--ink-deep);
  font-weight:700;font-size:.92rem;
  padding:10px 18px;border-radius:999px;
  box-shadow:0 10px 22px rgba(245,165,36,.32);
  transition:transform .2s ease,box-shadow .2s ease;
}
.btn-cta:hover{color:var(--ink-deep);transform:translateY(-2px);box-shadow:0 16px 30px rgba(245,165,36,.42)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);background:#fff;color:var(--ink);font-size:1.05rem;
}

/* ---------- buttons ---------- */
.btn-primary{
  display:inline-flex;align-items:center;gap:10px;
  background:var(--ink);color:#F7F6F2;font-weight:700;font-size:1rem;
  padding:14px 26px;border-radius:var(--r-sm);border:1px solid var(--ink);
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease;
}
.btn-primary:hover{color:#fff;background:var(--ink-deep);transform:translateY(-3px);box-shadow:var(--sh-hover)}
.btn-primary i{transition:transform .2s ease}
.btn-primary:hover i{transform:translateX(4px)}
.btn-amber{
  display:inline-flex;align-items:center;gap:10px;
  background:var(--amber);color:var(--ink-deep);font-weight:700;font-size:1rem;
  padding:14px 26px;border-radius:var(--r-sm);border:1px solid var(--amber);
  transition:transform .2s ease,box-shadow .2s ease;
}
.btn-amber:hover{color:var(--ink-deep);transform:translateY(-3px);box-shadow:0 16px 32px rgba(245,165,36,.38)}
.btn-amber i{transition:transform .2s ease}
.btn-amber:hover i{transform:translateX(4px)}
.btn-ghost{
  display:inline-flex;align-items:center;gap:10px;
  background:transparent;color:var(--ink);font-weight:700;font-size:1rem;
  padding:13px 24px;border-radius:var(--r-sm);border:1.5px solid rgba(16,42,42,.28);
  transition:border-color .2s ease,background .2s ease,transform .2s ease;
}
.btn-ghost:hover{border-color:var(--cyan);background:rgba(31,175,159,.08);color:var(--ink);transform:translateY(-3px)}
.btn-sm{padding:9px 16px;font-size:.88rem;border-radius:10px}

/* ---------- hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  background:
    linear-gradient(102deg,rgba(11,31,31,.94) 0%,rgba(16,42,42,.86) 48%,rgba(31,175,159,.42) 100%),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color:#EAF4F2;
  padding:84px 0 76px;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:64px 64px;opacity:.5;pointer-events:none;
}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.08fr .92fr;gap:52px;align-items:center}
.page-hero .eyebrow{color:#BFF3EA;background:rgba(123,224,212,.14);border-color:rgba(123,224,212,.34)}
.page-hero h1{color:#fff;max-width:15em}
.hero-sub{color:#CFE6E2;font-size:1.08rem;margin:20px 0 0;max-width:34em}
.hero-btns{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.page-hero .btn-primary{background:#fff;color:var(--ink-deep);border-color:#fff}
.page-hero .btn-primary:hover{background:var(--cyan-light);color:var(--ink-deep);border-color:var(--cyan-light)}
.page-hero .btn-ghost{color:#EAF4F2;border-color:rgba(234,244,242,.42)}
.page-hero .btn-ghost:hover{border-color:var(--cyan-light);background:rgba(123,224,212,.12);color:#fff}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.hero-chip{
  font-size:.82rem;font-weight:600;color:#D8EFEB;
  border:1px solid rgba(216,239,235,.28);border-radius:999px;
  padding:6px 14px;background:rgba(255,255,255,.05);
}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;border-radius:var(--r-lg);
  border:1px solid rgba(255,255,255,.16);
  box-shadow:0 30px 60px rgba(0,0,0,.34);
}
.float-card{
  position:absolute;left:-18px;bottom:-20px;
  background:#fff;color:var(--ink);border-radius:16px;
  padding:14px 18px;font-size:.86rem;font-weight:700;
  box-shadow:var(--sh);display:flex;align-items:center;gap:10px;
}
.float-card i{color:var(--cyan)}
.float-card span{color:var(--muted);font-weight:500}

/* ---------- platform tabs ---------- */
.plat-tabs{gap:10px;border:none;margin-bottom:28px;flex-wrap:wrap}
.plat-tabs .nav-link{
  border:1px solid var(--line);background:#fff;color:#3A4A47;
  font-weight:700;font-size:.94rem;border-radius:999px;padding:10px 20px;
  display:inline-flex;align-items:center;gap:8px;
}
.plat-tabs .nav-link:hover{border-color:var(--cyan);color:var(--ink)}
.plat-tabs .nav-link.active{background:var(--ink);border-color:var(--ink);color:#fff}
.plat-tabs .nav-link i{color:var(--cyan)}
.plat-tabs .nav-link.active i{color:var(--cyan-light)}
.ver-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.ver-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  padding:26px 24px;transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
  height:100%;
}
.ver-card:hover{transform:translateY(-4px);border-color:var(--cyan);box-shadow:var(--sh-hover)}
.ver-num{
  font-family:Inter,"DIN Alternate",Consolas,monospace;
  font-size:.82rem;font-weight:700;color:#0d6d63;letter-spacing:.08em;
}
.ver-card h3{margin:10px 0 8px;font-size:1.14rem}
.ver-card p{color:var(--muted);font-size:.94rem;margin-bottom:16px}
.spec-mini{list-style:none;padding:0;margin:0;border-top:1px dashed var(--line);padding-top:14px}
.spec-mini li{display:flex;justify-content:space-between;gap:12px;font-size:.88rem;padding:5px 0}
.spec-mini span{color:var(--muted)}
.spec-mini b{font-weight:700;color:var(--ink);font-family:Inter,"DIN Alternate",Consolas,monospace}

/* ---------- spec list ---------- */
.spec-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.spec-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  padding:26px 26px 20px;display:flex;flex-direction:column;gap:6px;
  transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.spec-card:hover{transform:translateY(-4px);border-color:var(--cyan);box-shadow:var(--sh-hover)}
.spec-card h3{display:flex;align-items:center;gap:10px}
.spec-card h3 i{color:var(--cyan);font-size:1.05rem}
.spec-dl{margin:14px 0 0;display:grid;gap:2px}
.spec-dl div{display:flex;justify-content:space-between;gap:16px;padding:9px 0;border-bottom:1px dashed var(--line)}
.spec-dl div:last-child{border-bottom:none}
.spec-dl dt{color:var(--muted);font-weight:500;font-size:.92rem;margin:0}
.spec-dl dd{margin:0;font-weight:700;color:var(--ink);font-size:.92rem;text-align:right}

/* ---------- download panel ---------- */
.dl-panel{
  background:linear-gradient(140deg,var(--ink-deep) 0%,#12312E 55%,#164F48 100%);
  color:#E6F3F1;border-radius:var(--r-lg);padding:44px;
  display:grid;grid-template-columns:1.5fr .9fr;gap:40px;align-items:center;
  box-shadow:0 30px 60px rgba(11,31,31,.28);
}
.dl-panel h2{color:#fff;font-size:1.9rem}
.dl-panel p{color:#B9D6D2;margin:14px 0 24px}
.dl-actions{display:flex;flex-wrap:wrap;gap:12px}
.dl-actions .btn-outline-light{
  border-radius:var(--r-sm);font-weight:700;font-size:.94rem;padding:12px 20px;
  display:inline-flex;align-items:center;gap:8px;
}
.dl-actions .btn-outline-light:hover{background:rgba(123,224,212,.16);border-color:var(--cyan-light);color:#fff}
.dl-facts{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.dl-facts span{
  font-size:.8rem;font-weight:600;color:#CFE6E2;
  border:1px solid rgba(207,230,226,.26);border-radius:999px;padding:5px 13px;
}
.qr-side{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.16);
  border-radius:var(--r-md);padding:26px;text-align:center;
}
.qr-box{
  width:150px;height:150px;margin:0 auto 16px;border-radius:16px;
  background:repeating-linear-gradient(45deg,#EAF4F2 0 8px,#D5E9E5 8px 16px);
  display:grid;place-items:center;color:var(--ink);font-size:1.9rem;
}
.qr-side b{display:block;color:#fff;font-size:.98rem}
.qr-side small{color:#B9D6D2;display:block;margin-top:6px;font-size:.82rem;line-height:1.7}

/* ---------- timeline ---------- */
.timeline{position:relative;padding-left:34px}
.timeline::before{content:"";position:absolute;left:9px;top:6px;bottom:6px;width:2px;background:linear-gradient(180deg,var(--cyan),rgba(31,175,159,.08))}
.tl-item{position:relative;padding:0 0 30px 0}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-31px;top:8px;width:14px;height:14px;border-radius:50%;
  background:#fff;border:3px solid var(--cyan);box-shadow:0 0 0 4px rgba(31,175,159,.14);
}
.tl-item b{display:block;font-size:1.02rem;color:var(--ink);font-weight:800}
.tl-item em{font-style:normal;font-size:.8rem;font-weight:700;color:#0d6d63;font-family:Inter,"DIN Alternate",Consolas,monospace;letter-spacing:.06em}
.tl-item p{color:var(--muted);font-size:.94rem;margin:.5rem 0 0}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.step{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  padding:26px 22px;transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.step:hover{transform:translateY(-4px);border-color:var(--cyan);box-shadow:var(--sh-hover)}
.step-num{
  font-family:Inter,"DIN Alternate",Consolas,monospace;font-size:1.5rem;font-weight:800;
  color:rgba(31,175,159,.32);letter-spacing:-.02em;
}
.step h3{font-size:1.04rem;margin:10px 0 8px}
.step p{color:var(--muted);font-size:.9rem;margin:0}

/* ---------- split block ---------- */
.split{display:grid;grid-template-columns:1.02fr .98fr;gap:52px;align-items:center}
.split img{border-radius:var(--r-lg);border:1px solid var(--line);box-shadow:var(--sh)}
.check-list{list-style:none;padding:0;display:grid;gap:14px;margin-top:22px}
.check-list li{display:flex;gap:12px;font-size:.96rem;color:#2C3A38}
.check-list i{color:var(--cyan);margin-top:6px}

/* ---------- faq ---------- */
.faq-wrap{max-width:920px;margin:0 auto}
.faq .accordion-item{
  border:1px solid var(--line);border-radius:var(--r-sm)!important;
  background:#fff;margin-bottom:12px;overflow:hidden;box-shadow:none;
}
.faq .accordion-button{
  font-weight:700;font-size:1rem;color:var(--ink);background:#fff;
  padding:20px 22px;box-shadow:none;
}
.faq .accordion-button:not(.collapsed){color:#0d6d63;background:rgba(31,175,159,.06)}
.faq .accordion-button:focus{box-shadow:none;border-color:var(--line)}
.faq .accordion-button::after{
  background-image:none;content:"\f107";font-family:"Font Awesome 6 Free";font-weight:900;
  width:22px;height:22px;transform:none;transition:transform .28s ease;color:var(--cyan);
  display:grid;place-items:center;font-size:.95rem;
}
.faq .accordion-button:not(.collapsed)::after{transform:rotate(180deg)}
.faq .accordion-body{color:var(--muted);font-size:.95rem;padding:0 22px 22px;line-height:1.9}

/* ---------- cta band ---------- */
.cta-band{
  background:linear-gradient(120deg,var(--ink) 0%,#12403A 58%,var(--cyan) 130%);
  border-radius:var(--r-lg);padding:56px 48px;color:#EAF4F2;
  display:flex;flex-wrap:wrap;gap:28px;align-items:center;justify-content:space-between;
  box-shadow:0 28px 56px rgba(16,42,42,.24);
}
.cta-band h2{color:#fff;font-size:1.85rem}
.cta-band p{color:#C6E0DC;margin:10px 0 0;max-width:48ch}
.cta-band .btns{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-deep);color:#B9CFCB;padding:72px 0 26px;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px}
.foot-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.foot-brand b{color:#fff;font-size:1.1rem}
.site-footer .brand-mark{width:38px;height:38px;border-radius:12px;font-size:.95rem;background:linear-gradient(140deg,#16403C,#1FAF9F)}
.site-footer p{color:#9CB8B4;font-size:.92rem;line-height:1.9}
.site-footer h4{color:#fff;font-size:1rem;margin-bottom:16px}
.foot-list{list-style:none;padding:0;display:grid;gap:10px}
.foot-list li{font-size:.92rem;color:#9CB8B4;display:flex;gap:9px;align-items:flex-start}
.foot-list a{color:#B9CFCB}
.foot-list a:hover{color:var(--cyan-light)}
.foot-list i{color:var(--cyan);font-size:.78rem;margin-top:7px}
.foot-rule{
  border-top:1px solid rgba(255,255,255,.1);margin-top:44px;padding-top:20px;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:.84rem;color:#8AA5A1;
}

/* ---------- offcanvas ---------- */
.offcanvas{background:var(--bg);color:var(--ink)}
.offcanvas-header{border-bottom:1px solid var(--line)}
.offcanvas .oc-nav{display:grid;gap:10px;margin-top:8px}
.offcanvas .oc-nav a{
  display:flex;align-items:center;justify-content:space-between;
  font-size:1.3rem;font-weight:800;color:var(--ink);
  padding:16px 4px;border-bottom:1px solid var(--line);
}
.offcanvas .oc-nav a.active{color:#0d6d63}
.offcanvas .oc-foot{margin-top:auto;padding-top:24px}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .hero-grid{gap:36px}
  .ver-grid{grid-template-columns:repeat(3,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:991px){
  :root{--sec:72px}
  .nav-menu{display:none}
  .nav-toggle{display:grid;place-items:center}
  .count-pill{display:none}
  .header-inner{height:64px;gap:14px}
  .hero-grid{grid-template-columns:1fr}
  .hero-visual{order:2}
  .float-card{position:static;margin-top:16px;left:auto;bottom:auto}
  .ver-grid{grid-template-columns:repeat(2,1fr)}
  .spec-grid{grid-template-columns:1fr}
  .dl-panel{grid-template-columns:1fr;padding:34px}
  .split{grid-template-columns:1fr;gap:32px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:30px}
  .page-hero{padding:64px 0 60px}
  .cta-band{padding:40px 30px}
}
@media (max-width:767px){
  :root{--sec:56px}
  body{font-size:16.5px}
  h1{font-size:clamp(2rem,7vw,2.6rem)}
  .header-inner{height:60px}
  .brand-text em{display:none}
  .btn-cta{padding:9px 14px;font-size:.86rem}
  .ver-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .foot-rule{flex-direction:column;gap:8px}
  .hero-btns .btn-primary,.hero-btns .btn-ghost{width:100%;justify-content:center}
  .dl-actions .btn-primary,.dl-actions .btn-amber{width:100%;justify-content:center}
  .cta-band h2{font-size:1.5rem}
  .spec-card{padding:22px 18px}
  .float-card{font-size:.82rem}
}
@media (max-width:520px){
  .wrap{padding:0 16px}
  .dl-panel{padding:26px 20px}
  .qr-box{width:126px;height:126px}
}

/* roulang page: article */
:root{
  --ink:#102A2A;
  --ink-deep:#0B1F1F;
  --cyan:#1FAF9F;
  --cyan-light:#7BE0D4;
  --amber:#F5A524;
  --coral:#FF6B4A;
  --bg:#F7F6F2;
  --card:#FFFFFF;
  --line:#E4E1D8;
  --text:#101615;
  --muted:#5B6663;
  --ok:#1F9D6A;
  --warn:#D97706;
  --r-lg:24px;
  --r-md:18px;
  --r-sm:12px;
  --shadow:0 10px 30px rgba(16,42,42,.08);
  --shadow-lg:0 20px 46px rgba(16,42,42,.16);
  --sp:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;padding:72px 0 0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:17px;line-height:1.85;color:var(--text);background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:var(--ink);text-decoration:none;transition:color .22s ease,border-color .22s ease}
a:hover{color:var(--cyan)}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;color:var(--ink);line-height:1.35}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:3px solid rgba(31,175,159,.55);outline-offset:2px;border-radius:8px}

.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
.section{padding:var(--sp) 0}
.section-tight{padding:64px 0}
.sec-head{max-width:760px;margin-bottom:40px}
.sec-head h2{font-size:clamp(1.6rem,2.4vw,2.3rem);margin-bottom:14px}
.sec-head p{color:var(--muted);font-size:17px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--cyan);text-transform:uppercase;margin-bottom:14px}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--cyan);border-radius:2px}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1040;height:72px;
  background:rgba(247,246,242,.94);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);transition:box-shadow .25s ease,background .25s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 26px rgba(16,42,42,.10);background:rgba(247,246,242,.99)}
.nav-wrap{height:72px;display:flex;align-items:center;gap:26px}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;border-radius:14px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--ink) 0%,#164444 55%,var(--cyan) 130%);
  color:var(--cyan-light);font-size:18px;box-shadow:0 8px 18px rgba(16,42,42,.22);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:17px;font-weight:800;color:var(--ink);letter-spacing:-.02em}
.brand-text em{font-style:normal;font-size:11.5px;color:var(--muted);letter-spacing:.06em}
.nav-menu{display:flex;align-items:center;gap:30px;margin-left:8px}
.nav-item{position:relative;font-size:15px;font-weight:600;color:var(--ink);padding:8px 2px}
.nav-item::after{content:"";position:absolute;left:50%;bottom:0;width:0;height:2px;border-radius:2px;background:var(--cyan);transform:translateX(-50%);transition:width .26s ease}
.nav-item:hover::after,.nav-item.active::after{width:22px}
.nav-item:hover,.nav-item.active{color:var(--cyan)}
.nav-side{margin-left:auto;display:flex;align-items:center;gap:12px}
.count-pill{
  display:inline-flex;align-items:center;gap:8px;height:36px;padding:0 14px;border-radius:999px;
  background:#E9F6F3;color:var(--ink);font-size:13px;font-weight:600;border:1px solid #D3ECE6;
}
.count-pill i{color:var(--cyan)}
.count-pill b{font-family:"Inter","DIN Alternate",Menlo,Consolas,monospace;font-variant-numeric:tabular-nums;font-size:13.5px;letter-spacing:.02em;animation:pulseNum 2.4s ease-in-out infinite}
@keyframes pulseNum{0%,100%{opacity:1}50%{opacity:.55}}
.status-tag{
  display:inline-flex;align-items:center;gap:6px;height:36px;padding:0 13px;border-radius:999px;
  background:#E6F7F4;color:#0E6E63;font-size:13px;font-weight:700;
}
.status-tag i{color:var(--ok);font-size:12px}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-sm);border:1px solid var(--line);
  background:#fff;color:var(--ink);font-size:17px;align-items:center;justify-content:center;
}

/* ---------- buttons ---------- */
.btn-base{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:50px;padding:0 24px;border-radius:var(--r-sm);font-size:15.5px;font-weight:600;
  border:1px solid transparent;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn-base i{transition:transform .2s ease}
.btn-base:hover i{transform:translateX(4px)}
.btn-cta{height:42px;padding:0 20px;border-radius:999px;background:var(--amber);color:var(--ink-deep);font-weight:700;box-shadow:0 8px 18px rgba(245,165,36,.30);display:inline-flex;align-items:center;gap:8px;font-size:14.5px}
.btn-cta:hover{background:#E8961A;color:var(--ink-deep);transform:translateY(-2px);box-shadow:0 12px 24px rgba(245,165,36,.38)}
.btn-cta:active{transform:translateY(1px)}
.btn-ink{background:var(--ink);color:#F7F6F2;box-shadow:0 12px 26px rgba(16,42,42,.22)}
.btn-ink:hover{background:var(--ink-deep);color:#fff;transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.btn-amber{background:var(--amber);color:var(--ink-deep);box-shadow:0 12px 26px rgba(245,165,36,.30)}
.btn-amber:hover{background:#E8961A;color:var(--ink-deep);transform:translateY(-4px);box-shadow:0 18px 34px rgba(245,165,36,.36)}
.btn-ghost{background:transparent;border-color:rgba(16,42,42,.35);color:var(--ink)}
.btn-ghost:hover{background:rgba(16,42,42,.06);border-color:var(--cyan);color:var(--cyan);transform:translateY(-4px)}
.btn-ghost-light{background:transparent;border-color:rgba(247,246,242,.5);color:#F7F6F2}
.btn-ghost-light:hover{background:rgba(247,246,242,.12);border-color:var(--cyan-light);color:#fff;transform:translateY(-4px)}
.btn-base:active{transform:translateY(1px)}

/* ---------- mobile drawer ---------- */
.mobile-drawer{width:min(90vw,360px);background:var(--card);border-left:1px solid var(--line)}
.mobile-drawer .offcanvas-header{padding:20px 22px;border-bottom:1px solid var(--line)}
.drawer-brand{display:flex;align-items:center;gap:12px;font-size:16.5px;font-weight:800;color:var(--ink)}
.drawer-nav{display:flex;flex-direction:column;gap:4px;padding:8px 0 0}
.drawer-nav a{font-size:19px;font-weight:700;color:var(--ink);padding:14px 6px;border-bottom:1px solid var(--line)}
.drawer-nav a:hover,.drawer-nav a.active{color:var(--cyan)}
.drawer-foot{margin-top:26px;display:flex;flex-direction:column;gap:14px}
.drawer-foot p{font-size:13.5px;color:var(--muted)}

/* ---------- banner ---------- */
.page-banner{
  position:relative;padding:64px 0 72px;color:#F4FBF9;overflow:hidden;
  background-image:linear-gradient(115deg,rgba(11,31,31,.95) 0%,rgba(16,42,42,.86) 52%,rgba(31,175,159,.42) 130%),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
}
.page-banner::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.07;
  background-image:linear-gradient(0deg,rgba(247,246,242,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(247,246,242,.6) 1px,transparent 1px);
  background-size:56px 56px;
}
.banner-inner{position:relative;z-index:2;max-width:920px}
.crumbs{display:flex;align-items:center;gap:10px;font-size:13.5px;color:rgba(244,251,249,.72);margin-bottom:24px;flex-wrap:wrap}
.crumbs a{color:rgba(244,251,249,.82)}
.crumbs a:hover{color:var(--cyan-light)}
.crumbs i{font-size:10px;opacity:.7}
.banner-tag{
  display:inline-flex;align-items:center;gap:8px;height:32px;padding:0 14px;border-radius:999px;
  background:rgba(123,224,212,.16);border:1px solid rgba(123,224,212,.4);color:var(--cyan-light);
  font-size:13px;font-weight:700;margin-bottom:20px;
}
.page-banner h1{font-size:clamp(1.85rem,3.6vw,3rem);color:#fff;line-height:1.32;letter-spacing:-.02em}
.banner-sub{margin-top:18px;font-size:16.5px;color:rgba(244,251,249,.82);max-width:760px}

/* ---------- article ---------- */
.article-section{padding:72px 0 24px}
.article-body{
  max-width:820px;margin:0 auto;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:48px 52px;box-shadow:var(--shadow);
}
.article-meta{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:22px}
.meta-item{
  display:inline-flex;align-items:center;gap:7px;height:32px;padding:0 13px;border-radius:999px;
  background:#F1F6F4;color:var(--muted);font-size:13.5px;font-weight:600;
}
.meta-item i{color:var(--cyan);font-size:12.5px}
.article-lead{
  font-size:17.5px;line-height:1.9;color:#233430;background:#F4FAF8;
  border-left:4px solid var(--cyan);border-radius:0 var(--r-sm) var(--r-sm) 0;padding:18px 22px;
}
.article-divider{height:1px;background:linear-gradient(90deg,var(--line),rgba(228,225,216,0));margin:34px 0 8px}
.article-content{font-size:17.5px;line-height:1.9;color:#1B2523}
.article-content h2{font-size:1.62rem;margin:2.1em 0 .7em;padding-left:16px;border-left:4px solid var(--cyan);line-height:1.45}
.article-content h3{font-size:1.26rem;margin:1.8em 0 .6em}
.article-content h4{font-size:1.08rem;margin:1.5em 0 .5em;color:#22423F}
.article-content p{margin:0 0 1.25em}
.article-content ul,.article-content ol{margin:0 0 1.4em;padding-left:1.4em}
.article-content ul li{list-style:disc;margin:.5em 0}
.article-content ol li{list-style:decimal;margin:.5em 0}
.article-content blockquote{margin:1.6em 0;padding:16px 22px;background:#F0F7F5;border-left:4px solid var(--cyan-light);border-radius:0 var(--r-sm) var(--r-sm) 0;color:#22423F}
.article-content img{border-radius:16px;margin:1.6em auto;box-shadow:var(--shadow)}
.article-content figure{margin:1.8em 0}
.article-content figcaption{text-align:center;color:var(--muted);font-size:13.5px;margin-top:10px}
.article-content table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15.5px}
.article-content th,.article-content td{border:1px solid var(--line);padding:12px 14px;text-align:left}
.article-content th{background:#F0F7F5;font-weight:700;color:var(--ink)}
.article-content code{background:#EEF4F2;color:#0E6E63;padding:2px 7px;border-radius:6px;font-size:.92em}
.article-content pre{background:var(--ink-deep);color:#D9F5F0;padding:18px 20px;border-radius:14px;overflow:auto;margin:1.6em 0}
.article-content pre code{background:none;color:inherit;padding:0}
.article-content a{color:var(--cyan);border-bottom:1px solid rgba(31,175,159,.35)}
.article-content a:hover{color:var(--ink);border-color:var(--ink)}
.article-content hr{border:0;height:1px;background:var(--line);margin:2.4em 0}
.empty-state{
  text-align:center;padding:44px 20px;border:2px dashed var(--line);border-radius:var(--r-md);background:#FBFAF7;
}
.empty-state i{font-size:30px;color:var(--cyan);margin-bottom:16px;display:block}
.empty-state h2{font-size:1.35rem;margin-bottom:12px}
.empty-state p{color:var(--muted);margin-bottom:24px}

.article-actions{
  max-width:820px;margin:32px auto 0;display:flex;flex-wrap:wrap;gap:14px;align-items:center;
}
.article-actions .hint{margin-left:auto;font-size:13.5px;color:var(--muted)}

/* ---------- related ---------- */
.related-section{padding:72px 0 var(--sp)}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.rel-card{
  display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow);
  transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.rel-card:hover{transform:translateY(-4px);border-color:var(--cyan);box-shadow:var(--shadow-lg)}
.rel-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:linear-gradient(135deg,var(--ink),var(--cyan))}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.rel-card:hover .rel-thumb img{transform:scale(1.05)}
.rel-body{padding:22px 24px 26px;display:flex;flex-direction:column;gap:10px;flex:1}
.rel-body h3{font-size:1.14rem}
.rel-body p{color:var(--muted);font-size:15.5px;line-height:1.75;flex:1}
.rel-link{display:inline-flex;align-items:center;gap:8px;font-size:14.5px;font-weight:700;color:var(--cyan)}
.rel-card:hover .rel-link i{transform:translateX(4px)}
.rel-link i{transition:transform .2s ease}

/* ---------- cta ---------- */
.cta-panel{
  position:relative;overflow:hidden;border-radius:var(--r-lg);padding:52px 56px;color:#F4FBF9;
  background-image:linear-gradient(110deg,rgba(11,31,31,.96),rgba(16,42,42,.9) 55%,rgba(31,175,159,.55) 140%),url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;box-shadow:var(--shadow-lg);
  display:flex;align-items:center;gap:36px;flex-wrap:wrap;
}
.cta-panel h2{color:#fff;font-size:clamp(1.4rem,2.2vw,2rem);margin-bottom:12px}
.cta-panel p{color:rgba(244,251,249,.85);max-width:620px}
.cta-actions{margin-left:auto;display:flex;gap:14px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-deep);color:#B9C9C6;padding:64px 0 26px;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}
.foot-brand{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.foot-brand b{color:#fff;font-size:17px;font-weight:800}
.site-footer p{font-size:15px;line-height:1.85;color:#9DB1AE;max-width:360px}
.site-footer h4{color:#fff;font-size:15.5px;margin-bottom:18px;font-weight:700}
.foot-list{display:flex;flex-direction:column;gap:12px}
.foot-list li{font-size:14.5px;color:#9DB1AE;display:flex;align-items:center;gap:9px}
.foot-list a{color:#B9C9C6}
.foot-list a:hover{color:var(--cyan-light)}
.foot-list i{color:var(--cyan);font-size:12px}
.foot-rule{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(247,246,242,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13.5px;color:#8296 93;color:#829693;
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.reveal.is-in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  :root{--sp:80px}
  .wrap{max-width:1000px}
  .count-pill{display:none}
}
@media (max-width:991.98px){
  :root{--sp:72px}
  .nav-menu{display:none}
  .nav-toggle{display:inline-flex}
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:repeat(2,1fr);gap:34px}
  .article-body{padding:40px 34px}
  .cta-panel{padding:42px 34px}
  .cta-actions{margin-left:0}
}
@media (max-width:767.98px){
  :root{--sp:56px}
  body{padding-top:60px;font-size:16.5px}
  .site-header,.nav-wrap{height:60px}
  .brand-mark{width:38px;height:38px;flex:0 0 38px;border-radius:12px;font-size:16px}
  .brand-text b{font-size:15.5px}
  .brand-text em{display:none}
  .status-tag{display:none}
  .page-banner{padding:44px 0 52px}
  .article-section{padding:48px 0 16px}
  .article-body{padding:30px 22px;border-radius:var(--r-md)}
  .article-content{font-size:16.5px}
  .article-content h2{font-size:1.35rem}
  .related-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .foot-rule{flex-direction:column;gap:8px}
  .btn-base{height:48px;padding:0 20px;font-size:15px}
  .cta-panel{padding:34px 24px}
  .cta-actions{width:100%}
  .cta-actions .btn-base{flex:1 1 100%}
  .article-actions .hint{margin-left:0;width:100%}
}
@media (max-width:519.98px){
  .wrap{padding:0 18px}
  .article-meta{gap:8px}
  .meta-item{height:30px;font-size:12.5px;padding:0 11px}
}

/* roulang page: category2 */
:root{
  --ink:#102A2A;
  --ink-deep:#0B1F1F;
  --cyan:#1FAF9F;
  --cyan-light:#7BE0D4;
  --amber:#F5A524;
  --coral:#FF6B4A;
  --bg:#F7F6F2;
  --bg-soft:#EFF3F1;
  --card:#FFFFFF;
  --line:#E4E1D8;
  --line-soft:#EDEAE2;
  --text:#101615;
  --muted:#5B6663;
  --success:#1F9D6A;
  --warn:#D97706;
  --hero-text:#EAF3F1;
  --r-lg:24px;
  --r-md:18px;
  --r-sm:12px;
  --shadow-1:0 10px 30px rgba(11,31,31,.06);
  --shadow-2:0 18px 44px rgba(11,31,31,.12);
  --shadow-3:0 26px 60px rgba(11,31,31,.18);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  padding-top:72px;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:17px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:var(--ink);text-decoration:none;transition:color .25s var(--ease),background-color .25s var(--ease),border-color .25s var(--ease),transform .25s var(--ease)}
a:hover{color:var(--cyan)}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.4px;line-height:1.3;color:var(--ink)}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit;border:0;background:none;cursor:pointer}
a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(31,175,159,.4);outline-offset:2px;border-radius:8px}
.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-tight{padding:72px 0}
.section-white{background:var(--card)}
.section-soft{background:var(--bg-soft)}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1030;
  height:72px;
  background:rgba(247,246,242,.9);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;gap:26px;height:72px}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-mark{
  width:42px;height:42px;border-radius:13px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--ink) 0%,#164A45 60%,var(--cyan) 140%);
  color:var(--cyan-light);font-size:18px;
  box-shadow:0 8px 18px rgba(16,42,42,.22);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:17.5px;font-weight:800;color:var(--ink);letter-spacing:-.3px}
.brand-text small{font-size:11.5px;color:var(--muted);font-weight:500;letter-spacing:.6px}
.nav-menu{display:flex;align-items:center;gap:4px;margin-left:8px}
.nav-item{
  position:relative;padding:10px 16px;border-radius:10px;
  font-size:16px;font-weight:600;color:var(--muted);
}
.nav-item:hover{color:var(--ink);background:var(--bg-soft)}
.nav-item.active{color:var(--ink)}
.nav-item.active::after{
  content:"";position:absolute;left:16px;right:16px;bottom:1px;height:2.5px;
  border-radius:3px;background:var(--cyan);
}
.nav-side{display:flex;align-items:center;gap:12px;margin-left:auto}
.count-pill{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13.5px;font-weight:600;color:var(--ink);
  background:#ECF6F3;border:1px solid #D3ECE5;border-radius:999px;padding:7px 14px;
}
.count-pill i{color:var(--cyan);font-size:12px}
.cd{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-variant-numeric:tabular-nums;letter-spacing:.5px}
.status-tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:600;color:#0E6F5F;
  background:#DFF5EF;border-radius:999px;padding:7px 13px;
}
.status-tag i{font-size:9px}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--amber);color:var(--ink-deep);
  font-size:15px;font-weight:700;padding:11px 20px;border-radius:12px;
  box-shadow:0 10px 22px rgba(245,165,36,.28);
}
.nav-cta:hover{background:#E5941A;color:var(--ink-deep);transform:translateY(-3px);box-shadow:0 16px 28px rgba(245,165,36,.34)}
.nav-cta i{font-size:13px;transition:transform .25s var(--ease)}
.nav-cta:hover i{transform:translateX(4px)}
.nav-toggle{
  display:none;margin-left:auto;
  width:44px;height:44px;border-radius:12px;
  align-items:center;justify-content:center;
  background:var(--card);border:1px solid var(--line);color:var(--ink);font-size:17px;
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.mobile-nav{width:min(350px,88vw);background:var(--bg);border-left:1px solid var(--line)}
.mobile-nav .offcanvas-header{border-bottom:1px solid var(--line);padding:18px 22px}
.mobile-nav .offcanvas-body{padding:22px;display:flex;flex-direction:column;gap:6px}
.m-nav-item{
  display:block;padding:16px 14px;border-radius:14px;
  font-size:18px;font-weight:700;color:var(--ink);border:1px solid transparent;
}
.m-nav-item:hover{background:var(--card);border-color:var(--line);color:var(--ink)}
.m-nav-item.active{background:var(--card);border-color:#CDE9E2;color:var(--ink)}
.m-nav-item.active::before{content:"";display:inline-block;width:8px;height:8px;border-radius:3px;background:var(--cyan);margin-right:10px;vertical-align:middle}
.m-cta{
  display:flex;align-items:center;justify-content:center;gap:10px;
  margin-top:16px;background:var(--amber);color:var(--ink-deep);
  font-weight:700;padding:15px 20px;border-radius:14px;font-size:16px;
}
.m-cta:hover{background:#E5941A;color:var(--ink-deep)}
.m-note{font-size:13.5px;color:var(--muted);margin-top:18px;line-height:1.7}

/* ---------- 通用按钮 ---------- */
.btn-a,.btn-b,.btn-c,.btn-d{
  display:inline-flex;align-items:center;gap:10px;
  font-size:16px;font-weight:600;padding:14px 26px;border-radius:12px;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background-color .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease);
}
.btn-a{background:var(--amber);color:var(--ink-deep);box-shadow:0 12px 26px rgba(245,165,36,.3)}
.btn-a:hover{background:#E5941A;color:var(--ink-deep);transform:translateY(-3px);box-shadow:0 18px 32px rgba(245,165,36,.38)}
.btn-b{background:var(--ink);color:var(--hero-text);box-shadow:0 12px 26px rgba(11,31,31,.18)}
.btn-b:hover{background:var(--ink-deep);color:#fff;transform:translateY(-3px);box-shadow:0 18px 34px rgba(11,31,31,.26)}
.btn-c{background:transparent;color:var(--ink);border:1.5px solid rgba(16,42,42,.24)}
.btn-c:hover{border-color:var(--cyan);color:var(--ink);background:rgba(31,175,159,.08);transform:translateY(-3px)}
.btn-d{background:rgba(234,243,241,.06);color:var(--hero-text);border:1.5px solid rgba(234,243,241,.34)}
.btn-d:hover{border-color:var(--cyan-light);color:#fff;background:rgba(123,224,212,.12);transform:translateY(-3px)}
.btn-a i,.btn-b i,.btn-c i,.btn-d i{transition:transform .25s var(--ease)}
.btn-a:hover i.fa-arrow-right,.btn-b:hover i.fa-arrow-right,.btn-c:hover i.fa-arrow-right,.btn-d:hover i.fa-arrow-right{transform:translateX(4px)}
.btn-a:active,.btn-b:active,.btn-c:active,.btn-d:active{transform:translateY(1px)}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:var(--ink-deep);
  padding:76px 0 88px;
  color:var(--hero-text);
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(115deg,rgba(11,31,31,.96) 0%,rgba(16,42,42,.9) 48%,rgba(20,74,67,.72) 100%),
             url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  opacity:.94;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(123,224,212,.06) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(123,224,212,.06) 1px,transparent 1px);
  background-size:56px 56px;
  opacity:.7;pointer-events:none;
}
.hero .wrap{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);gap:56px;align-items:center}
.hero-title{
  font-size:clamp(2rem,4.2vw,3.5rem);
  line-height:1.18;color:#fff;letter-spacing:-1px;margin:20px 0 18px;
}
.hero-title em{font-style:normal;display:block;color:var(--cyan-light)}
.hero-sub{font-size:19px;color:#C4D9D5;max-width:560px;line-height:1.85}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:32px 0 34px}
.hero-metrics{display:flex;flex-wrap:wrap;gap:14px}
.metric{
  flex:1 1 140px;min-width:130px;
  background:rgba(234,243,241,.06);
  border:1px solid rgba(234,243,241,.16);
  border-radius:16px;padding:16px 18px;
}
.metric b{display:block;font-size:22px;color:var(--cyan-light);letter-spacing:-.5px;line-height:1.2}
.metric span{font-size:13.5px;color:#A9C2BE}
.hero-visual{position:relative}
.hero-shot{
  border-radius:var(--r-lg);overflow:hidden;position:relative;
  border:1px solid rgba(234,243,241,.18);
  box-shadow:0 30px 70px rgba(0,0,0,.42);
}
.hero-shot img{width:100%;height:380px;object-fit:cover}
.hero-shot::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(200deg,rgba(11,31,31,.1) 0%,rgba(11,31,31,.62) 100%);
}
.hero-float{
  position:absolute;left:-18px;bottom:-22px;
  background:var(--card);border-radius:16px;padding:14px 18px;
  box-shadow:var(--shadow-3);display:flex;align-items:center;gap:12px;
  min-width:210px;
}
.hero-float i{
  width:38px;height:38px;border-radius:11px;flex:0 0 38px;
  display:inline-flex;align-items:center;justify-content:center;
  background:#E7F6F2;color:#0E6F5F;font-size:15px;
}
.hero-float b{display:block;font-size:14.5px;color:var(--ink);line-height:1.35}
.hero-float span{font-size:12.5px;color:var(--muted)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.6px;
  padding:7px 15px;border-radius:999px;
  background:rgba(123,224,212,.14);color:var(--cyan-light);
  border:1px solid rgba(123,224,212,.3);
}
.eyebrow-dark{background:#E7F6F2;color:#0E6F5F;border-color:#CDE9E2}

/* ---------- 板块标题 ---------- */
.sec-head{max-width:780px;margin-bottom:48px}
.sec-title{font-size:clamp(1.6rem,2.7vw,2.35rem);margin:14px 0 16px}
.sec-desc{color:var(--muted);font-size:17px}
.sec-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;flex-wrap:wrap;max-width:none}

/* ---------- 功能模块（左右交错） ---------- */
.feat-row{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;padding:44px 0}
.feat-row + .feat-row{border-top:1px solid var(--line-soft)}
.feat-row.rev .feat-media{order:-1}
.feat-body{max-width:520px}
.feat-num{
  display:inline-flex;align-items:center;gap:10px;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:13px;font-weight:700;letter-spacing:2.5px;color:var(--cyan);
}
.feat-num::after{content:"";width:36px;height:2px;background:var(--cyan);opacity:.5}
.feat-body h3{font-size:clamp(1.3rem,2vw,1.7rem);margin:16px 0 14px}
.feat-body > p{color:var(--muted);margin-bottom:22px}
.tag-row{display:flex;flex-wrap:wrap;gap:10px}
.tag{
  font-size:13.5px;font-weight:600;color:#0E6F5F;
  background:#ECF6F3;border:1px solid #D3ECE5;
  border-radius:999px;padding:6px 14px;
}
.feat-media{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--shadow-2);background:#0B1F1F;
}
.feat-media img{width:100%;height:330px;object-fit:cover}
.feat-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(210deg,rgba(11,31,31,0) 40%,rgba(11,31,31,.5) 100%);
}
.feat-badge{
  position:absolute;top:18px;left:18px;z-index:2;
  background:rgba(245,165,36,.94);color:var(--ink-deep);
  font-size:12.5px;font-weight:700;padding:7px 13px;border-radius:999px;
}

/* ---------- 截图横向滚动 ---------- */
.shot-track{
  display:flex;gap:22px;overflow-x:auto;padding:6px 4px 22px;
  scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;
}
.shot-track::-webkit-scrollbar{height:8px}
.shot-track::-webkit-scrollbar-track{background:var(--line-soft);border-radius:99px}
.shot-track::-webkit-scrollbar-thumb{background:#C3CFCB;border-radius:99px}
.shot-track::-webkit-scrollbar-thumb:hover{background:var(--cyan)}
.shot{
  flex:0 0 calc((100% - 44px)/3);scroll-snap-align:start;
  background:var(--card);border:1px solid var(--line);border-radius:22px;
  padding:14px;box-shadow:var(--shadow-1);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.shot:hover{transform:translateY(-4px);border-color:var(--cyan);box-shadow:var(--shadow-2)}
.shot-frame{border-radius:15px;overflow:hidden;background:#0B1F1F;aspect-ratio:16/10}
.shot-frame img{width:100%;height:100%;object-fit:cover}
.shot h3{font-size:17px;margin:16px 6px 6px}
.shot p{font-size:14.5px;color:var(--muted);margin:0 6px 6px;line-height:1.7}
.shot-meta{
  display:inline-flex;align-items:center;gap:7px;margin:8px 6px 4px;
  font-size:12.5px;font-weight:600;color:#0E6F5F;
  background:#ECF6F3;border-radius:999px;padding:5px 12px;
}
.track-hint{font-size:13.5px;color:var(--muted);display:inline-flex;align-items:center;gap:8px}
.track-hint i{color:var(--cyan)}

/* ---------- 四步教程 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.step{
  background:var(--card);border:1px solid var(--line);border-radius:22px;
  padding:30px 24px 26px;position:relative;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.step:hover{transform:translateY(-4px);border-color:var(--cyan);box-shadow:var(--shadow-2)}
.step-idx{
  width:44px;height:44px;border-radius:13px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--ink);color:var(--cyan-light);
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:16px;font-weight:700;margin-bottom:18px;
}
.step h3{font-size:18px;margin-bottom:10px}
.step p{font-size:15px;color:var(--muted);line-height:1.75}
.step-line{position:relative}
.step-line::after{
  content:"";position:absolute;top:52px;right:-11px;width:22px;height:2px;
  background:repeating-linear-gradient(90deg,var(--line) 0 6px,transparent 6px 12px);
}
.step:last-child::after{display:none}

/* ---------- 速查 / 支持 ---------- */
.spec-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:34px;align-items:start}
.spec-list{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden}
.spec-item{padding:24px 28px;border-bottom:1px solid var(--line-soft)}
.spec-item:last-child{border-bottom:0}
.spec-key{display:flex;align-items:center;gap:12px;font-size:17px;font-weight:700;color:var(--ink);margin-bottom:8px}
.spec-key i{
  width:34px;height:34px;border-radius:10px;flex:0 0 34px;
  display:inline-flex;align-items:center;justify-content:center;
  background:#E7F6F2;color:#0E6F5F;font-size:14px;
}
.spec-item p{font-size:15.5px;color:var(--muted);line-height:1.78}
.support-card{
  background:linear-gradient(150deg,var(--ink-deep) 0%,#143C37 100%);
  border-radius:var(--r-lg);padding:34px 30px;color:var(--hero-text);
  box-shadow:var(--shadow-2);position:relative;overflow:hidden;
}
.support-card::after{
  content:"";position:absolute;right:-60px;top:-60px;width:200px;height:200px;
  border-radius:50%;background:radial-gradient(circle,rgba(123,224,212,.22),transparent 68%);
}
.support-card h3{color:#fff;font-size:20px;margin-bottom:12px;position:relative;z-index:2}
.support-card p{font-size:15px;color:#B7CDC9;position:relative;z-index:2}
.support-list{margin:24px 0 26px;position:relative;z-index:2}
.support-list li{
  display:flex;align-items:flex-start;gap:11px;
  font-size:15px;color:#D6E5E2;padding:9px 0;border-bottom:1px dashed rgba(234,243,241,.16);
}
.support-list li:last-child{border-bottom:0}
.support-list i{color:var(--cyan-light);margin-top:5px;font-size:13px}
.support-meta{display:flex;flex-wrap:wrap;gap:10px;position:relative;z-index:2}

/* ---------- 评价摘录 ---------- */
.voice-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.voice{
  background:var(--card);border:1px solid var(--line);border-radius:20px;
  padding:26px;box-shadow:var(--shadow-1);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.voice:hover{transform:translateY(-4px);border-color:var(--cyan);box-shadow:var(--shadow-2)}
.voice:nth-child(2){margin-top:26px}
.voice-stars{color:var(--amber);font-size:13px;letter-spacing:2px;margin-bottom:14px}
.voice p{font-size:16px;color:var(--text);line-height:1.8}
.voice-user{display:flex;align-items:center;gap:12px;margin-top:20px;padding-top:18px;border-top:1px solid var(--line-soft)}
.avatar{
  width:44px;height:44px;border-radius:50%;flex:0 0 44px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--ink),var(--cyan));
  color:#fff;font-weight:700;font-size:16px;
}
.voice-user b{display:block;font-size:15px;color:var(--ink)}
.voice-user span{font-size:13px;color:var(--muted)}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:900px;margin:0 auto}
.accordion-item{
  border:1px solid var(--line);border-radius:16px !important;
  margin-bottom:14px;overflow:hidden;background:var(--card);
}
.accordion-button{
  background:var(--card);color:var(--ink);
  font-size:17px;font-weight:700;padding:20px 22px;
  border-radius:16px !important;box-shadow:none;
}
.accordion-button::after{display:none}
.accordion-button:hover{color:var(--ink);background:#F4F8F7}
.accordion-button:not(.collapsed){background:#F1F7F5;color:var(--ink);box-shadow:none}
.accordion-button:focus{box-shadow:0 0 0 4px rgba(31,175,159,.18);border-color:var(--cyan);z-index:3}
.faq-icon{
  margin-left:auto;flex:0 0 auto;width:30px;height:30px;border-radius:9px;
  display:inline-flex;align-items:center;justify-content:center;
  background:#ECF6F3;color:#0E6F5F;font-size:12px;
  transition:transform .3s var(--ease),background-color .3s var(--ease);
}
.accordion-button:not(.collapsed) .faq-icon{transform:rotate(45deg);background:var(--cyan);color:#fff}
.accordion-body{padding:0 22px 22px;font-size:15.5px;color:var(--muted);line-height:1.85;background:#F1F7F5}

/* ---------- 底部 CTA ---------- */
.cta-band{
  background:linear-gradient(120deg,var(--ink-deep) 0%,#15443E 55%,#1B5A50 100%);
  border-radius:28px;padding:54px 52px;color:var(--hero-text);
  display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;
  box-shadow:var(--shadow-3);position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;left:-40px;bottom:-80px;width:260px;height:260px;
  border-radius:50%;background:radial-gradient(circle,rgba(245,165,36,.2),transparent 70%);
}
.cta-band h2{color:#fff;font-size:clamp(1.5rem,2.4vw,2.1rem);margin-bottom:12px;position:relative;z-index:2}
.cta-band p{color:#BCD2CE;font-size:16px;max-width:560px;position:relative;z-index:2}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;position:relative;z-index:2}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-deep);color:#AFC4C0;padding:72px 0 30px;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.15fr;gap:40px}
.foot-brand{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.foot-brand b{color:#fff;font-size:17.5px;font-weight:800}
.site-footer p{font-size:14.5px;line-height:1.85;color:#93AAA6;max-width:340px}
.site-footer h4{color:#fff;font-size:16px;margin-bottom:18px;font-weight:700}
.foot-list li{margin-bottom:12px}
.foot-list li a,.foot-list li{
  display:flex;align-items:center;gap:9px;
  font-size:14.5px;color:#A7BDB9;line-height:1.6;
}
.foot-list li a:hover{color:var(--cyan-light)}
.foot-list i{color:var(--cyan);font-size:11px;flex:0 0 auto}
.foot-rule{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(234,243,241,.12);
  display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:13.5px;color:#7E938F;
}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}
@keyframes riseIn{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:none}}
.anim{opacity:0;animation:riseIn .8s var(--ease) forwards}
.anim.d1{animation-delay:.08s}
.anim.d2{animation-delay:.18s}
.anim.d3{animation-delay:.28s}
@keyframes pulseDot{0%,100%{opacity:1}50%{opacity:.35}}
.cd-pulse{animation:pulseDot 2s ease-in-out infinite}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .wrap{max-width:1320px}
  .hero-grid{gap:40px}
  .shot{flex:0 0 calc((100% - 44px)/3)}
}
@media (max-width:991.98px){
  body{padding-top:60px}
  .site-header{height:60px}
  .nav-wrap{height:60px;gap:16px}
  .nav-menu,.nav-side{display:none}
  .nav-toggle{display:inline-flex}
  .brand-mark{width:38px;height:38px;font-size:16px}
  .brand-text small{display:none}
  .section{padding:72px 0}
  .section-tight{padding:56px 0}
  .hero{padding:52px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-shot img{height:300px}
  .hero-float{left:12px;bottom:-16px}
  .feat-row{grid-template-columns:1fr;gap:28px;padding:36px 0}
  .feat-row.rev .feat-media{order:0}
  .feat-body{max-width:none}
  .feat-media img{height:280px}
  .shot{flex:0 0 62%}
  .steps{grid-template-columns:repeat(2,1fr)}
  .step-line::after{display:none}
  .spec-grid{grid-template-columns:1fr}
  .voice-grid{grid-template-columns:repeat(2,1fr)}
  .voice:nth-child(2){margin-top:22px}
  .cta-band{padding:40px 32px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767.98px){
  body{font-size:16.5px}
  .wrap{padding:0 18px}
  .section{padding:56px 0}
  .hero-title{font-size:2rem}
  .hero-sub{font-size:17px}
  .hero-actions{gap:12px;margin:26px 0 28px}
  .btn-a,.btn-b,.btn-c,.btn-d{width:100%;justify-content:center;padding:14px 20px}
  .hero-actions .btn-a,.hero-actions .btn-b{width:100%}
  .shot{flex:0 0 78%}
  .steps{grid-template-columns:1fr}
  .voice-grid{grid-template-columns:1fr}
  .voice:nth-child(2){margin-top:0}
  .cta-band{padding:34px 24px;border-radius:22px}
  .cta-actions{width:100%}
  .foot-grid{grid-template-columns:1fr}
  .site-footer{padding:56px 0 26px}
  .foot-rule{margin-top:34px}
}
@media (max-width:520px){
  .hero-shot img{height:220px}
  .feat-media img{height:210px}
  .shot{flex:0 0 86%}
  .metric{flex:1 1 100%}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .reveal{opacity:1;transform:none}
  .anim{opacity:1;animation:none}
}