/* roulang page: index */
:root{
  --ice:#0FA6B8;
  --ice-dark:#0A7C8C;
  --ice-light:#E3F3F6;
  --flame:#FF5A36;
  --flame-dark:#E8441F;
  --magenta:#E6317A;
  --ink:#0C1620;
  --ink-2:#152431;
  --bg:#F3F8FB;
  --bg-alt:#E7F2F6;
  --text:#0E1F29;
  --muted:#566C7A;
  --faint:#8AA0AD;
  --line:#D7E4EB;
  --ok:#12A150;
  --warn:#E8A200;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --sh-1:0 1px 2px rgba(12,22,32,.06), 0 12px 32px -12px rgba(12,22,32,.18);
  --sh-2:0 2px 4px rgba(12,22,32,.08), 0 22px 48px -16px rgba(12,22,32,.28);
  --sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --nav-h:64px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s ease}
a:hover{color:var(--ice)}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure{margin:0}
ul,ol{padding:0;list-style:none}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
input{font-family:inherit}
:focus-visible{outline:2px solid var(--ice);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media(min-width:1440px){.container{max-width:1280px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  height:var(--nav-h);
  display:flex;align-items:center;
  background:rgba(243,248,251,.86);
  backdrop-filter:saturate(140%) blur(6px);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled{
  background:#fff;
  border-bottom-color:var(--line);
  box-shadow:0 4px 18px -10px rgba(12,22,32,.28);
}
.nav-inner{display:flex;align-items:center;gap:28px;width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media(min-width:1440px){.nav-inner{max-width:1280px}}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;letter-spacing:-.01em;color:var(--text);white-space:nowrap}
.logo:hover{color:var(--text)}
.logo-mark{width:32px;height:32px;flex:0 0 32px;border-radius:9px;background:linear-gradient(150deg,var(--ice),var(--ice-dark));display:grid;place-items:center;box-shadow:0 6px 16px -8px rgba(15,166,184,.9)}
.logo-mark svg{width:19px;height:19px;display:block}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:8px}
.nav-links a{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  font-size:15px;
  font-weight:600;
  color:var(--muted);
  border-radius:8px;
}
.nav-links a:hover{color:var(--text);background:rgba(15,166,184,.08)}
.nav-links a.is-active{color:var(--text)}
.nav-links a.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;border-radius:2px;background:var(--ice);
}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.search-wrap{position:relative;display:flex;align-items:center}
.search-box{
  width:0;opacity:0;pointer-events:none;
  height:40px;padding:0;border:1px solid var(--line);border-radius:var(--r-sm);
  background:#fff;font-size:14px;color:var(--text);
  transition:width .25s ease,opacity .2s ease,padding .25s ease;
}
.search-wrap.is-open .search-box{width:240px;opacity:1;pointer-events:auto;padding:0 14px}
.search-box:focus{outline:none;border-color:var(--ice);box-shadow:0 0 0 3px rgba(15,166,184,.15)}
.icon-btn{
  width:40px;height:40px;border-radius:var(--r-sm);
  display:grid;place-items:center;color:var(--muted);
  transition:background .2s ease,color .2s ease;
}
.icon-btn:hover{background:var(--ice-light);color:var(--ice-dark)}
.icon-btn svg{width:19px;height:19px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-weight:700;font-size:15px;line-height:1;
  border-radius:999px;padding:14px 26px;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
  border:1.5px solid transparent;white-space:nowrap;
}
.btn-primary{background:var(--flame);color:#fff;box-shadow:0 10px 24px -12px rgba(255,90,54,.95)}
.btn-primary:hover{background:var(--flame-dark);color:#fff;transform:translateY(-1px);box-shadow:0 16px 30px -12px rgba(255,90,54,.95)}
.btn-primary:active{transform:translateY(1px);box-shadow:0 6px 16px -10px rgba(255,90,54,.9)}
.btn-secondary{background:transparent;color:var(--ice-dark);border-color:var(--ice)}
.btn-secondary:hover{background:rgba(15,166,184,.08);color:var(--ice-dark);transform:translateY(-1px)}
.btn-secondary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
.btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff;transform:translateY(-1px)}
.btn-sm{padding:10px 18px;font-size:14px}
.btn-lg{padding:18px 38px;font-size:17px}
.btn-block{width:100%}
.btn svg{width:18px;height:18px;flex:0 0 18px}
.nav-cta{padding:11px 20px;font-size:14px}
.menu-toggle{display:none;width:40px;height:40px;border-radius:var(--r-sm);place-items:center;color:var(--text)}
.menu-toggle:hover{background:var(--ice-light)}
.menu-toggle svg{width:22px;height:22px}

/* drawer */
.drawer{
  position:fixed;inset:0 0 0 auto;width:min(320px,86vw);z-index:120;
  background:#fff;transform:translateX(100%);
  transition:transform .3s cubic-bezier(.4,0,.2,1);
  display:flex;flex-direction:column;padding:20px;
  box-shadow:-20px 0 50px -20px rgba(12,22,32,.4);
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line)}
.drawer-title{font-weight:800;font-size:16px}
.drawer-nav{display:flex;flex-direction:column;gap:2px;padding:16px 0}
.drawer-nav a{padding:12px 14px;border-radius:var(--r-sm);font-weight:600;color:var(--muted)}
.drawer-nav a:hover{background:var(--ice-light);color:var(--ice-dark)}
.drawer-nav a.is-active{color:var(--ice-dark);background:var(--ice-light)}
.drawer-foot{margin-top:auto;padding-top:20px;border-top:1px solid var(--line)}
.scrim{position:fixed;inset:0;background:rgba(12,22,32,.46);z-index:110;opacity:0;pointer-events:none;transition:opacity .3s ease}
.scrim.is-open{opacity:1;pointer-events:auto}

/* ---------- hero ---------- */
.hero{padding:calc(var(--nav-h) + 40px) 0 0;position:relative;overflow:hidden}
.hero-bg{
  position:absolute;inset:0;
  background:linear-gradient(180deg,#F7FBFD 0%,#EEF6FA 60%,var(--bg) 100%);
  z-index:-2;
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(115deg,rgba(15,166,184,.05) 0 2px,transparent 2px 26px);
  opacity:.7;
}
.hero-grid{display:grid;grid-template-columns:55% 45%;gap:48px;align-items:center}
.hero-badges{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  font-size:11px;font-weight:700;letter-spacing:.02em;line-height:1.6;
}
.badge-ice{background:var(--ice-light);color:var(--ice-dark)}
.badge-magenta{background:rgba(230,49,122,.12);color:#B81F5D}
.badge-dark{background:var(--ink);color:#fff}
.badge-line{background:#fff;color:var(--muted);border:1px solid var(--line)}
.hero h1{
  font-size:40px;line-height:1.2;font-weight:800;letter-spacing:-.02em;
  margin-bottom:18px;
}
.hero h1 em{font-style:normal;color:var(--ice-dark)}
.hero-sub{font-size:17px;color:var(--muted);max-width:480px;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:8px 22px;
  font-family:var(--mono);font-size:12.5px;color:var(--faint);
  padding-top:20px;border-top:1px dashed var(--line);
}
.hero-meta b{color:var(--muted);font-weight:600}
.hero-meta .star{color:var(--magenta);font-weight:700}

.hero-visual{position:relative}
.hero-shot{
  position:relative;border-radius:20px;overflow:hidden;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 34px),calc(100% - 34px) 100%,0 100%);
  box-shadow:var(--sh-2);
  background:var(--ink);
}
.hero-shot img{width:100%;height:440px;object-fit:cover}
.hero-shot::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(160deg,rgba(15,166,184,.34),rgba(12,22,32,.5));
}
.float-card{
  position:absolute;background:#fff;border-radius:14px;padding:12px 16px;
  box-shadow:var(--sh-1);border:1px solid var(--line);
}
.float-card .fc-label{font-size:11px;color:var(--faint);font-weight:700;letter-spacing:.04em}
.float-card .fc-value{font-family:var(--mono);font-size:18px;font-weight:700;color:var(--text);line-height:1.3}
.fc-version{left:-18px;top:36px}
.fc-download{right:-16px;bottom:118px}
.qr-card{
  position:absolute;right:-14px;top:8px;
  width:120px;background:#fff;border-radius:14px;padding:10px;
  box-shadow:var(--sh-1);border:1px solid var(--line);text-align:center;
}
.qr-box{
  width:100%;aspect-ratio:1/1;border-radius:10px;
  background:
    linear-gradient(90deg,var(--ink) 8px,transparent 8px) 0 0/24px 24px,
    linear-gradient(180deg,var(--ink) 8px,transparent 8px) 0 0/24px 24px,
    #fff;
  border:1px solid var(--line);
}
.qr-card span{display:block;font-size:11px;color:var(--faint);margin-top:8px;font-weight:700}
.hero-strip{
  height:24px;margin-top:56px;
  background:linear-gradient(90deg,var(--ice) 0%,rgba(15,166,184,.25) 55%,rgba(243,248,251,0) 100%);
}

/* ---------- section base ---------- */
.section{padding:96px 0}
.section-alt{background:var(--bg-alt)}
.section-white{background:#fff}
.section-ink{background:var(--ink);color:#fff}
.section-head{margin-bottom:52px;max-width:720px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:800;letter-spacing:.12em;color:var(--ice-dark);
  text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--ice)}
.section h2{font-size:30px;line-height:1.28;font-weight:800;letter-spacing:-.015em}
.section-lead{margin-top:14px;color:var(--muted);font-size:16px}
.section-ink .section-lead{color:rgba(255,255,255,.7)}
.section-ink .eyebrow{color:#7FDCE6}
.section-ink .eyebrow::before{background:#7FDCE6}
.head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px}
.head-row .section-head{margin-bottom:0}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-weight:700;font-size:15px;color:var(--ice-dark);
  text-decoration:underline;text-underline-offset:5px;text-decoration-thickness:2px;
}
.text-link:hover{color:var(--flame)}
.text-link svg{width:15px;height:15px}

/* ---------- value rows ---------- */
.value-list{display:flex;flex-direction:column;gap:72px}
.value-row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.value-row.flip .value-media{order:-1}
.value-text .v-icon{
  width:46px;height:46px;border-radius:12px;background:var(--ice-light);
  display:grid;place-items:center;color:var(--ice-dark);margin-bottom:18px;
}
.value-text .v-icon svg{width:23px;height:23px}
.value-text h3{font-size:22px;font-weight:800;margin-bottom:12px;letter-spacing:-.01em}
.value-text p{color:var(--muted);font-size:15.5px;max-width:460px}
.value-points{margin-top:18px;display:flex;flex-direction:column;gap:9px}
.value-points li{position:relative;padding-left:24px;font-size:14.5px;color:var(--muted)}
.value-points li::before{
  content:"";position:absolute;left:0;top:9px;width:14px;height:8px;
  border-left:2px solid var(--ice);border-bottom:2px solid var(--ice);
  transform:rotate(-45deg);border-radius:1px;
}
.value-media{position:relative}
.value-media img{border-radius:var(--r-lg);width:100%;height:300px;object-fit:cover;box-shadow:var(--sh-1)}
.value-media .vm-tag{
  position:absolute;left:18px;bottom:18px;
  background:rgba(12,22,32,.82);color:#fff;
  padding:8px 14px;border-radius:999px;font-size:12px;font-weight:700;
  font-family:var(--mono);
}

/* ---------- carousel ---------- */
.shots{position:relative}
.shots-track{
  display:grid;grid-auto-flow:column;
  grid-auto-columns:calc((100% - 2 * 24px) / 3);
  gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:6px 4px 22px;
  scrollbar-width:none;
}
.shots-track::-webkit-scrollbar{display:none}
.shot{
  scroll-snap-align:start;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .2s ease,box-shadow .2s ease;
}
.shot:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.shot-frame{padding:10px;background:var(--ice-light)}
.shot-frame img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:10px}
.shot-body{padding:18px 20px 22px}
.shot-body h3{font-size:17px;font-weight:800;margin-bottom:6px}
.shot-body p{font-size:14px;color:var(--muted)}
.shots-nav{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:6px}
.arrow-btn{
  width:44px;height:44px;border-radius:50%;
  border:1px solid var(--line);background:#fff;color:var(--muted);
  display:grid;place-items:center;transition:all .2s ease;
}
.arrow-btn:hover{border-color:var(--ice);color:var(--ice-dark);background:var(--ice-light)}
.arrow-btn svg{width:18px;height:18px}
.arrow-group{display:flex;gap:10px}
.bars{display:flex;gap:8px;flex:1;max-width:240px}
.bars i{height:4px;flex:1;border-radius:2px;background:var(--line);transition:background .2s ease}
.bars i.on{background:var(--ice)}

/* ---------- specs ---------- */
.tabs{display:inline-flex;gap:6px;padding:5px;background:#fff;border:1px solid var(--line);border-radius:999px;margin-bottom:34px}
.tab-btn{
  padding:10px 22px;border-radius:999px;font-size:14px;font-weight:700;color:var(--muted);
  transition:all .2s ease;
}
.tab-btn:hover{color:var(--ice-dark)}
.tab-btn.is-active{background:var(--ink);color:#fff}
.spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 56px}
.spec-panel{display:none}
.spec-panel.is-active{display:block}
.spec-row{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:16px 2px;border-bottom:1px solid rgba(215,228,235,.85);
}
.spec-row span:first-child{font-size:14.5px;color:var(--muted);font-weight:600}
.spec-row span:last-child{font-family:var(--mono);font-size:14px;color:var(--text);text-align:right}
.spec-note{margin-top:26px;font-size:14px;color:var(--muted)}
.spec-note a{color:var(--ice-dark);font-weight:700;text-decoration:underline;text-underline-offset:4px}

/* ---------- reviews ---------- */
.review-wall{columns:3;column-gap:24px}
.review{
  break-inside:avoid;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px;margin-bottom:24px;position:relative;
  box-shadow:var(--sh-1);transition:transform .2s ease,box-shadow .2s ease;
}
.review:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.review .verified{
  position:absolute;right:16px;top:16px;
  font-size:10px;font-weight:800;letter-spacing:.04em;
  background:rgba(230,49,122,.12);color:#B81F5D;padding:4px 10px;border-radius:999px;
}
.review-top{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(140deg,var(--ice),var(--ice-dark));color:#fff;display:grid;place-items:center;font-weight:800;font-size:15px}
.review-name{font-weight:700;font-size:15px;line-height:1.4}
.review-src{font-size:12px;color:var(--faint);font-family:var(--mono)}
.stars{color:var(--ice);letter-spacing:2px;font-size:13px;margin-bottom:10px}
.stars i{color:var(--line);font-style:normal}
.review p{font-size:14.5px;color:var(--muted)}

/* ---------- download ---------- */
.dl-wrap{display:grid;grid-template-columns:1fr 300px;gap:56px;align-items:center}
.dl-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.dl-side{
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.14);
  border-radius:var(--r-lg);padding:24px;
}
.dl-side .qr-box{border-color:rgba(255,255,255,.2);max-width:150px;margin:0 auto 16px}
.dl-side .dl-line{
  font-family:var(--mono);font-size:12.5px;color:rgba(255,255,255,.72);
  display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px dashed rgba(255,255,255,.16);
}
.dl-side .dl-line:last-child{border-bottom:0}
.dl-foot{margin-top:30px;font-size:13.5px;color:rgba(255,255,255,.6)}
.dl-foot a{color:#7FDCE6;text-decoration:underline;text-underline-offset:4px;margin-right:18px}

/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  display:flex;flex-direction:column;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#C3DAE3}
.news-cover{position:relative;display:block;background:var(--ice-light)}
.news-cover img{width:100%;aspect-ratio:16/10;object-fit:cover}
.news-cover .badge{position:absolute;left:12px;top:12px}
.news-body{padding:20px 20px 22px;display:flex;flex-direction:column;flex:1}
.news-body h3{font-size:17px;font-weight:800;line-height:1.5;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-body p{font-size:14px;color:var(--muted);flex:1;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{
  display:flex;align-items:center;justify-content:space-between;
  margin-top:16px;padding-top:14px;border-top:1px solid var(--line);
  font-family:var(--mono);font-size:12.5px;color:var(--faint);
}
.news-meta svg{width:15px;height:15px;color:var(--ice)}
.news-empty{
  grid-column:1/-1;text-align:center;padding:56px 24px;
  background:#fff;border:1px dashed var(--line);border-radius:var(--r-lg);
}
.news-empty svg{width:56px;height:56px;color:var(--ice);margin:0 auto 16px}
.news-empty p{color:var(--muted);margin-bottom:14px}

/* ---------- faq ---------- */
.faq-list{max-width:920px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease}
.faq-item.is-open{border-color:#BFDCE4;box-shadow:var(--sh-1)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 22px;text-align:left;font-size:16px;font-weight:700;color:var(--text);
}
.faq-q:hover{color:var(--ice-dark)}
.faq-sign{
  flex:0 0 28px;width:28px;height:28px;border-radius:50%;
  background:var(--ice-light);color:var(--ice-dark);
  display:grid;place-items:center;font-size:17px;line-height:1;
  transition:transform .25s ease,background .2s ease;
}
.faq-item.is-open .faq-sign{transform:rotate(180deg);background:var(--ice);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a p{padding:0 22px 22px;color:var(--muted);font-size:15px;max-width:790px}

/* ---------- cta ---------- */
.cta-band{
  background:linear-gradient(120deg,var(--ice-light),#F2FAFC);
  position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(100deg,rgba(15,166,184,.09) 0 3px,transparent 3px 30px);
}
.cta-inner{position:relative;text-align:center;padding:72px 0}
.cta-inner h2{font-size:30px;font-weight:800;letter-spacing:-.015em}
.cta-inner p{margin:14px auto 30px;max-width:560px;color:var(--muted)}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:72px 0 0;font-size:14.5px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:44px;padding-bottom:48px}
.footer-brand .logo{color:#fff;margin-bottom:16px}
.footer-brand p{max-width:320px;color:rgba(255,255,255,.6);font-size:14px}
.footer-col h4{color:#fff;font-size:15px;font-weight:800;margin-bottom:16px;letter-spacing:.01em}
.footer-col li{margin-bottom:10px}
.footer-col a{color:rgba(255,255,255,.68);font-size:14.5px}
.footer-col a:hover{color:#7FDCE6}
.footer-col .mono{font-family:var(--mono);font-size:13px;color:rgba(255,255,255,.55)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0;display:flex;flex-wrap:wrap;gap:10px 24px;
  align-items:center;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom a{color:rgba(255,255,255,.6)}
.footer-bottom a:hover{color:#7FDCE6}

/* ---------- responsive ---------- */
@media(max-width:1024px){
  .nav-links{display:none}
  .menu-toggle{display:grid}
  .nav-cta{display:none}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero h1{font-size:34px}
  .hero-shot img{height:340px}
  .float-card,.qr-card{display:none}
  .section{padding:72px 0}
  .section h2{font-size:26px}
  .value-list{gap:56px}
  .value-row{grid-template-columns:1fr;gap:28px}
  .value-row.flip .value-media{order:0}
  .shots-track{grid-auto-columns:calc((100% - 24px) / 2)}
  .spec-grid{grid-template-columns:1fr}
  .review-wall{columns:2}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .dl-wrap{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:768px){
  .container,.nav-inner{padding:0 18px}
  .hero{padding-top:calc(var(--nav-h) + 28px)}
  .hero h1{font-size:28px;line-height:1.3}
  .hero-sub{font-size:15.5px}
  .hero-actions .btn{flex:1 1 auto}
  .section{padding:56px 0}
  .section h2{font-size:24px;line-height:1.32}
  .head-row{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:32px}
  .value-text h3{font-size:19px}
  .value-media img{height:220px}
  .shots-track{grid-auto-columns:88%}
  .review-wall{columns:1}
  .news-grid{grid-template-columns:1fr}
  .cta-inner{padding:56px 0}
  .cta-inner h2{font-size:24px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .faq-q{font-size:15px;padding:17px 18px}
  .faq-a p{padding:0 18px 18px}
  .tabs{width:100%;justify-content:center}
}
@media(max-width:520px){
  .search-wrap.is-open .search-box{width:150px}
  .btn-lg{padding:16px 26px;font-size:16px}
  .spec-row{flex-direction:column;align-items:flex-start;gap:6px}
  .spec-row span:last-child{text-align:left}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* roulang page: article */
:root{
  --main:#0FA6B8;
  --main-dark:#0A7C8C;
  --main-light:#E3F3F6;
  --accent:#FF5A36;
  --accent-dark:#E8431F;
  --pink:#E6317A;
  --ink:#0C1620;
  --bg:#F3F8FB;
  --bg-alt:#E7F2F6;
  --text:#0E1F29;
  --text-2:#566C7A;
  --text-3:#8AA0AD;
  --line:#D7E4EB;
  --ok:#12A150;
  --warn:#E8A200;
  --radius:16px;
  --radius-sm:12px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(12,22,32,.06), 0 12px 32px -12px rgba(12,22,32,.18);
  --shadow-2:0 2px 6px rgba(12,22,32,.08), 0 22px 44px -16px rgba(12,22,32,.24);
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
  --ease:cubic-bezier(.2,.7,.3,1);
  --nav-h:64px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.7;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--main);outline-offset:2px;border-radius:6px}
button{font-family:inherit;cursor:pointer;border:0;background:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;letter-spacing:-.01em}
p{margin:0}
.mono{font-family:var(--mono);letter-spacing:0}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1440px){.container{max-width:1280px}}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s var(--ease),background .25s var(--ease);
}
.site-header.is-stuck{box-shadow:0 6px 22px -14px rgba(12,22,32,.35)}
.nav-inner{
  height:var(--nav-h);
  display:flex;align-items:center;gap:28px;
}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;color:var(--text);letter-spacing:-.02em;white-space:nowrap}
.logo-mark{
  width:34px;height:34px;border-radius:11px;
  background:linear-gradient(140deg,var(--main) 0%,var(--main-dark) 100%);
  display:grid;place-items:center;flex:0 0 auto;
  box-shadow:0 6px 14px -6px rgba(15,166,184,.75);
}
.logo-mark svg{width:19px;height:19px}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:6px}
.nav-links a{
  position:relative;
  display:inline-block;
  padding:9px 14px;
  font-size:15px;
  font-weight:600;
  color:var(--text-2);
  border-radius:10px;
}
.nav-links a:hover{color:var(--main-dark);background:var(--main-light)}
.nav-links a.is-active{color:var(--main-dark)}
.nav-links a.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--main);border-radius:2px;
}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:700;
  padding:0 20px;height:44px;
  border-radius:var(--radius-pill);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 10px 22px -12px rgba(255,90,54,.95)}
.btn-primary:hover{background:var(--accent-dark);transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:translateY(1px);box-shadow:none}
.btn-ghost{background:transparent;color:var(--main-dark);border:1.5px solid var(--main);border-radius:10px}
.btn-ghost:hover{background:rgba(15,166,184,.08);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:38px;font-size:14px;padding:0 16px}
.icon-btn{
  width:42px;height:42px;border-radius:12px;
  display:grid;place-items:center;
  color:var(--text-2);border:1px solid var(--line);background:#fff;
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.icon-btn:hover{color:var(--main-dark);border-color:var(--main);background:var(--main-light)}
.icon-btn svg{width:19px;height:19px}
.search-wrap{position:relative;display:flex;align-items:center;gap:8px}
.search-box{
  width:0;opacity:0;overflow:hidden;
  transition:width .28s var(--ease),opacity .2s var(--ease);
}
.search-box.is-open{width:240px;opacity:1}
.search-box input{
  width:100%;height:42px;border-radius:10px;
  border:1px solid var(--line);
  padding:0 14px;font-size:14px;color:var(--text);background:#fff;
}
.search-box input::placeholder{color:var(--text-3)}
.search-box input:focus{border-color:var(--main);box-shadow:0 0 0 3px rgba(15,166,184,.15);outline:none}
.nav-toggle{display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);color:var(--text);place-items:center;background:#fff}
.nav-toggle svg{width:20px;height:20px}
.drawer-mask{
  position:fixed;inset:0;background:rgba(12,22,32,.42);
  opacity:0;pointer-events:none;transition:opacity .25s var(--ease);z-index:90;
}
.drawer-mask.is-open{opacity:1;pointer-events:auto}

/* ---------- Breadcrumb & Article hero ---------- */
.article-hero{
  position:relative;
  background:#fff;
  border-bottom:1px solid var(--line);
  overflow:hidden;
  padding:88px 0 44px;
}
.hero-bg{
  position:absolute;inset:0;
  background-size:cover;background-position:center right;
  opacity:.14;
}
.article-hero::after{
  content:"";position:absolute;right:-80px;top:-60px;width:340px;height:340px;
  background:var(--main-light);border-radius:50%;opacity:.6;
}
.article-hero-inner{position:relative;z-index:2;max-width:1000px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:22px}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--main-dark)}
.breadcrumb .sep{color:var(--line)}
.badge{
  display:inline-flex;align-items:center;
  font-size:11px;font-weight:700;letter-spacing:.02em;
  padding:5px 11px;border-radius:var(--radius-pill);
}
.badge-main{background:var(--main-light);color:var(--main-dark)}
.badge-pink{background:rgba(230,49,122,.12);color:#B82463}
.badge-dark{background:var(--ink);color:#fff}
.article-head h1{
  font-size:40px;line-height:1.25;font-weight:800;
  margin:16px 0 18px;max-width:900px;
}
.meta-bar{display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;font-size:13px;color:var(--text-2)}
.meta-item{display:inline-flex;align-items:center;gap:7px}
.meta-item b{color:var(--text);font-weight:600}
.meta-dot{width:5px;height:5px;border-radius:50%;background:var(--line)}

/* ---------- Layout ---------- */
main{display:block}
.section{padding:72px 0}
.section-tight{padding:48px 0}
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 240px;
  gap:48px;
  align-items:start;
}
.article-body{
  max-width:820px;
  font-size:16px;
  color:#22333D;
}
.article-body > *:first-child{margin-top:0}
.article-body h2{
  position:relative;
  font-size:23px;font-weight:700;line-height:1.5;
  margin:40px 0 16px;padding-left:14px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:7px;bottom:7px;width:4px;
  background:var(--main);border-radius:2px;
}
.article-body h3{font-size:18px;font-weight:600;margin:28px 0 12px}
.article-body p{font-size:16px;line-height:1.9;margin:0 0 1.1em}
.article-body a{color:var(--main-dark);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--accent)}
.article-body ul,.article-body ol{margin:0 0 1.3em;padding-left:22px}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{line-height:1.9;margin-bottom:8px}
.article-body ul li::marker{color:var(--main)}
.article-body ol li::marker{color:var(--main);font-weight:700}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;
  border-left:3px solid var(--main);
  background:var(--main-light);
  border-radius:0 12px 12px 0;
  color:var(--text-2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:12px;margin:24px auto}
.article-body figure{margin:24px 0}
.article-body figcaption{font-size:13px;color:var(--text-2);text-align:center;margin-top:10px}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;margin:24px 0;overflow:hidden;border-radius:12px}
.article-body th{background:var(--main-light);text-align:left;font-weight:700}
.article-body th,.article-body td{border-bottom:1px solid var(--line);padding:12px 14px;line-height:1.7}
.article-body tr:hover td{background:#FAFDFE}
.article-body code{
  font-family:var(--mono);font-size:14px;
  background:#EEF6F8;border-radius:6px;padding:2px 6px;
}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0}
.empty-state{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:56px 32px;text-align:center;box-shadow:var(--shadow-1);
}
.empty-state h2{font-size:22px;margin-bottom:12px}
.empty-state p{color:var(--text-2);margin-bottom:24px}
.empty-ico{
  width:64px;height:64px;border-radius:18px;background:var(--main-light);
  display:grid;place-items:center;margin:0 auto 20px;color:var(--main-dark);
}
.empty-ico svg{width:30px;height:30px}

/* ---------- TOC ---------- */
.toc{
  position:sticky;top:calc(var(--nav-h) + 24px);
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:18px 18px 14px;box-shadow:var(--shadow-1);
}
.toc-head{
  display:flex;align-items:center;justify-content:space-between;
  font-size:14px;font-weight:700;color:var(--text);
}
.toc-caret{color:var(--text-3);font-family:var(--mono);font-size:16px;transition:transform .25s var(--ease)}
.toc.is-collapsed .toc-caret{transform:rotate(45deg)}
.toc-list{margin-top:12px;border-top:1px solid var(--line);padding-top:12px;max-height:52vh;overflow:auto}
.toc-list li{margin-bottom:2px}
.toc-list a{
  display:block;font-size:13.5px;line-height:1.6;color:var(--text-2);
  padding:7px 10px;border-radius:8px;border-left:2px solid transparent;
}
.toc-list a:hover{color:var(--main-dark);background:var(--main-light)}
.toc-list a.is-current{color:var(--main-dark);background:var(--main-light);border-left-color:var(--main);font-weight:600}
.toc.is-collapsed .toc-list{display:none}
.toc-empty{font-size:13px;color:var(--text-3);margin-top:10px}

/* ---------- Article foot ---------- */
.article-foot{margin-top:48px;padding-top:28px;border-top:1px solid var(--line)}
.tag-list{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:22px}
.tag{
  font-size:13px;font-weight:600;color:var(--text-2);
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-pill);
  padding:7px 14px;transition:all .2s var(--ease);
}
.tag:hover{color:var(--main-dark);border-color:var(--main);background:var(--main-light)}
.foot-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px}
.back-link{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:700;color:var(--main-dark)}
.back-link:hover{color:var(--accent)}
.back-link svg{width:16px;height:16px}
.share{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-3)}
.share a{
  width:36px;height:36px;border-radius:10px;border:1px solid var(--line);
  display:grid;place-items:center;color:var(--text-2);background:#fff;
}
.share a:hover{color:var(--main-dark);border-color:var(--main);background:var(--main-light)}
.share a svg{width:16px;height:16px}

/* ---------- Related ---------- */
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:32px}
.section-head h2{font-size:28px;font-weight:800}
.section-head p{font-size:14px;color:var(--text-2);margin-top:8px}
.link-more{font-size:14px;font-weight:700;color:var(--main-dark);display:inline-flex;align-items:center;gap:6px}
.link-more:hover{color:var(--accent)}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
  display:flex;flex-direction:column;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.card-cover{position:relative;aspect-ratio:16/10;background:var(--main-light);overflow:hidden}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.card:hover .card-cover img{transform:scale(1.04)}
.card-cover .badge{position:absolute;left:12px;top:12px}
.card-body{padding:18px 18px 20px;display:flex;flex-direction:column;flex:1}
.card-body h3{font-size:17px;font-weight:700;line-height:1.5;margin:2px 0 10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-body p{font-size:14px;line-height:1.75;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{margin-top:16px;display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--text-3)}
.card-meta .mono{color:var(--text-2)}

/* ---------- Pager ---------- */
.pager{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:48px}
.pager a{
  display:flex;flex-direction:column;gap:6px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:18px 20px;box-shadow:var(--shadow-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.pager a:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--main)}
.pager span{font-size:12.5px;color:var(--text-3);font-weight:600}
.pager strong{font-size:15.5px;font-weight:700;color:var(--text)}
.pager .pager-next{text-align:right;align-items:flex-end}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--main-light);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(135deg,rgba(12,22,32,.035) 0 2px,transparent 2px 14px);
  opacity:.9;
}
.cta-inner{
  position:relative;z-index:2;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;
  padding:44px 0;
}
.cta-inner h2{font-size:26px;font-weight:800;margin-bottom:10px}
.cta-inner p{font-size:15px;color:var(--text-2);max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:#C6D4DC;padding:64px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer-brand .logo{color:#fff;font-size:18px;margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.85;color:#8FA4B0;max-width:340px}
.footer-col h4{font-size:14px;color:#fff;margin-bottom:16px;font-weight:700;letter-spacing:.02em}
.footer-col ul li{margin-bottom:11px;font-size:14px;color:#8FA4B0}
.footer-col ul li a:hover{color:var(--main)}
.footer-col ul li.mono{font-family:var(--mono);font-size:13px;color:#8FA4B0}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13px;color:#7C909C;
}

/* ---------- To top ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:70;
  width:46px;height:46px;border-radius:14px;
  background:var(--ink);color:#fff;display:grid;place-items:center;
  box-shadow:var(--shadow-2);
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity .25s var(--ease),transform .25s var(--ease),background .2s var(--ease);
}
.to-top.is-visible{opacity:1;transform:translateY(0);pointer-events:auto}
.to-top:hover{background:var(--main-dark)}
.to-top svg{width:19px;height:19px}

/* ---------- Responsive ---------- */
@media (max-width:1024px){
  .article-layout{grid-template-columns:1fr;gap:32px}
  .toc{position:static;order:-1}
  .toc-list{max-height:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:900px){
  .nav-links{
    position:fixed;top:0;right:0;z-index:100;
    width:280px;height:100vh;
    background:#fff;
    flex-direction:column;align-items:stretch;
    padding:22px 18px;gap:4px;margin:0;
    transform:translateX(100%);
    transition:transform .3s var(--ease);
    box-shadow:-18px 0 40px -20px rgba(12,22,32,.4);
    overflow-y:auto;
  }
  .nav-links.is-open{transform:translateX(0)}
  .nav-links a{padding:13px 14px;font-size:15.5px;border-radius:12px}
  .nav-links a.is-active{background:var(--main-light)}
  .nav-links a.is-active::after{display:none}
  .nav-toggle{display:grid}
  .nav-links .drawer-cta{margin-top:16px;display:block}
  .nav-links .drawer-cta .btn{width:100%}
  .search-wrap{display:none}
  .article-head h1{font-size:32px}
  .cta-inner{padding:36px 0}
}
@media (max-width:768px){
  .container{padding:0 18px}
  .article-hero{padding:56px 0 32px}
  .article-head h1{font-size:28px;line-height:1.35;margin:14px 0 16px}
  .section{padding:56px 0}
  .section-tight{padding:36px 0}
  .grid-3{grid-template-columns:1fr}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px;margin-bottom:24px}
  .section-head h2{font-size:23px}
  .article-body h2{font-size:20px;margin:32px 0 14px}
  .article-body h3{font-size:17px}
  .pager{grid-template-columns:1fr}
  .pager .pager-next{text-align:left;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column}
  .cta-inner h2{font-size:22px}
  .to-top{right:16px;bottom:16px}
}
@media (max-width:520px){
  .nav-inner{gap:12px}
  .logo{font-size:15.5px}
  .logo span:last-child{max-width:150px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .btn-sm{padding:0 14px}
  .article-body table{font-size:14px}
  .article-body th,.article-body td{padding:10px}
  .empty-state{padding:40px 20px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
}

/* roulang page: category1 */
:root{
  --c-primary:#0FA6B8;
  --c-primary-dark:#0A7C8C;
  --c-primary-soft:#E3F3F6;
  --c-accent:#FF5A36;
  --c-accent-dark:#E8431F;
  --c-magenta:#E6317A;
  --c-ink:#0C1620;
  --c-bg:#F3F8FB;
  --c-bg-alt:#E7F2F6;
  --c-text:#0E1F29;
  --c-text-2:#566C7A;
  --c-text-3:#8AA0AD;
  --c-line:#D7E4EB;
  --c-success:#12A150;
  --c-warn:#E8A200;
  --radius:16px;
  --radius-sm:12px;
  --shadow-1:0 1px 2px rgba(12,22,32,.06),0 12px 32px -12px rgba(12,22,32,.18);
  --shadow-2:0 2px 4px rgba(12,22,32,.08),0 20px 44px -16px rgba(12,22,32,.26);
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease;}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul{list-style:none;padding:0;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.01em;}
.section{padding:96px 0;}
.section--alt{background:var(--c-bg-alt);}
.section--tight{padding:72px 0;}
.section-head{max-width:760px;margin-bottom:48px;}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.06em;
  color:var(--c-primary-dark);
  background:var(--c-primary-soft);
  border-radius:999px;padding:6px 14px;margin-bottom:16px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-magenta);}
h1{font-size:40px;line-height:1.2;font-weight:800;letter-spacing:-.01em;}
h2{font-size:30px;line-height:1.3;font-weight:800;letter-spacing:-.01em;}
h3{font-size:20px;line-height:1.5;font-weight:700;}
.lede{font-size:17px;color:var(--c-text-2);margin-top:16px;}
.text-sub{color:var(--c-text-2);}
.text-weak{color:var(--c-text-3);font-size:13px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-weight:700;font-size:15px;line-height:1;
  padding:14px 26px;border-radius:999px;
  border:1.5px solid transparent;
  transition:transform .2s ease,box-shadow .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--c-accent);color:#fff;box-shadow:0 8px 20px -10px rgba(255,90,54,.85);}
.btn-primary:hover{background:var(--c-accent-dark);transform:translateY(-1px);box-shadow:0 14px 26px -12px rgba(255,90,54,.9);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 4px 12px -8px rgba(255,90,54,.9);}
.btn-ghost{background:transparent;border-color:var(--c-primary);color:var(--c-primary-dark);}
.btn-ghost:hover{background:rgba(15,166,184,.08);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-light{background:#fff;color:var(--c-ink);border-color:#fff;}
.btn-light:hover{background:var(--c-primary-soft);border-color:var(--c-primary-soft);transform:translateY(-1px);}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.55);}
.btn-outline-light:hover{border-color:#fff;background:rgba(255,255,255,.08);}
.btn-sm{padding:11px 20px;font-size:14px;}
.btn-lg{padding:17px 34px;font-size:16px;}
.btn-text{color:var(--c-primary-dark);font-weight:700;display:inline-flex;align-items:center;gap:6px;border-bottom:1px solid transparent;}
.btn-text:hover{border-bottom-color:var(--c-primary-dark);}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:11px;font-weight:700;letter-spacing:.02em;
  padding:5px 11px;border-radius:999px;
  background:var(--c-primary-soft);color:var(--c-primary-dark);
}
.badge--magenta{background:rgba(230,49,122,.12);color:#B92360;}
.badge--dark{background:var(--c-ink);color:#fff;}
.badge--warn{background:rgba(232,162,0,.14);color:#9A6B00;}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(243,248,251,.86);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid transparent;
  transition:background-color .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.site-header.is-stuck{background:#fff;border-bottom-color:var(--c-line);box-shadow:0 6px 20px -14px rgba(12,22,32,.35);}
.header-inner{display:flex;align-items:center;gap:28px;height:64px;}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:17px;letter-spacing:-.01em;color:var(--c-text);}
.logo:hover{color:var(--c-primary-dark);}
.logo-mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:10px;
  background:linear-gradient(135deg,var(--c-primary),var(--c-primary-dark));
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:0 6px 14px -8px rgba(15,166,184,.9);
}
.logo-mark svg{width:20px;height:20px;}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:8px;}
.nav-links a{
  position:relative;display:inline-block;padding:8px 12px;
  font-size:15px;font-weight:600;color:var(--c-text-2);border-radius:8px;
}
.nav-links a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:var(--c-primary);transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.nav-links a:hover{color:var(--c-text);background:rgba(15,166,184,.07);}
.nav-links a:hover::after,.nav-links a.is-active::after{transform:scaleX(1);}
.nav-links a.is-active{color:var(--c-primary-dark);}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto;}
.icon-btn{
  width:38px;height:38px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  color:var(--c-text-2);border:1px solid transparent;transition:background-color .2s ease,color .2s ease,border-color .2s ease;
}
.icon-btn:hover{background:#fff;border-color:var(--c-line);color:var(--c-primary-dark);}
.icon-btn svg{width:19px;height:19px;}
.search-box{display:none;align-items:center;width:240px;}
.search-box.is-open{display:flex;}
.search-box input{
  width:100%;height:38px;border-radius:10px;border:1px solid var(--c-line);
  padding:0 12px;background:#fff;color:var(--c-text);outline:none;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search-box input:focus{border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(15,166,184,.15);}
.menu-btn{display:none;width:38px;height:38px;border-radius:10px;align-items:center;justify-content:center;color:var(--c-text);border:1px solid var(--c-line);background:#fff;}
.menu-btn svg{width:20px;height:20px;}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:82%;max-width:340px;z-index:80;
  background:#fff;box-shadow:-18px 0 44px -22px rgba(12,22,32,.5);
  transform:translateX(102%);transition:transform .28s ease;
  display:flex;flex-direction:column;padding:20px 22px 24px;overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer-group{font-size:12px;font-weight:700;letter-spacing:.08em;color:var(--c-text-3);margin:14px 0 6px;}
.drawer-link{display:block;padding:12px 10px;border-radius:10px;font-weight:600;color:var(--c-text-2);border-bottom:1px solid var(--c-line);}
.drawer-link:hover{background:var(--c-primary-soft);color:var(--c-primary-dark);}
.drawer-link.is-active{color:var(--c-primary-dark);background:var(--c-primary-soft);}
.drawer-cta{margin-top:auto;padding-top:22px;}
.drawer-cta .btn{width:100%;}
.drawer-mask{
  position:fixed;inset:0;background:rgba(12,22,32,.45);z-index:70;opacity:0;pointer-events:none;transition:opacity .28s ease;
}
.drawer-mask.is-open{opacity:1;pointer-events:auto;}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding:20px 0 0;}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-text-3);}
.breadcrumb li{display:flex;align-items:center;gap:8px;}
.breadcrumb li::after{content:"/";color:var(--c-line);}
.breadcrumb li:last-child::after{display:none;}
.breadcrumb a:hover{color:var(--c-primary-dark);}
.breadcrumb [aria-current]{color:var(--c-text);font-weight:600;}

/* ---------- 分类 Hero ---------- */
.cat-hero{padding:36px 0 84px;}
.cat-hero-grid{display:grid;grid-template-columns:55fr 45fr;gap:56px;align-items:center;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:20px;}
.cat-hero h1{margin-bottom:18px;}
.cat-hero h1 span{color:var(--c-primary-dark);}
.cat-hero .subtitle{font-size:18px;color:var(--c-text-2);max-width:520px;}
.hero-btns{display:flex;flex-wrap:wrap;gap:14px;margin:28px 0 24px;}
.hero-spec{
  display:flex;flex-wrap:wrap;gap:10px 22px;
  font-size:13px;color:var(--c-text-2);
  border-top:1px solid var(--c-line);padding-top:18px;
}
.hero-spec b{font-weight:700;color:var(--c-text);}
.hero-media{position:relative;}
.hero-media .frame{
  position:relative;border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow-1);
  clip-path:polygon(0 0,100% 0,100% 88%,88% 100%,0 100%);
}
.hero-media .frame img{width:100%;height:420px;object-fit:cover;}
.hero-media .frame::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(15,166,184,.26),rgba(12,22,32,.42));
}
.hero-float{
  position:absolute;left:-24px;bottom:34px;background:#fff;border-radius:var(--radius-sm);
  box-shadow:var(--shadow-2);padding:14px 18px;display:flex;flex-direction:column;gap:2px;border:1px solid var(--c-line);
}
.hero-float .k{font-size:11px;font-weight:700;letter-spacing:.06em;color:var(--c-text-3);}
.hero-float .v{font-size:20px;font-weight:800;color:var(--c-primary-dark);}
.hero-float--top{left:auto;right:-16px;top:26px;bottom:auto;}
.hero-float--top .v{color:var(--c-magenta);}
.hero-divider{height:24px;background:linear-gradient(180deg,var(--c-primary-soft),transparent);}

/* ---------- 能力速览卡 ---------- */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.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{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);
  padding:28px 26px;box-shadow:var(--shadow-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#C6DBE4;}
.card .ico{
  width:44px;height:44px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
  background:var(--c-primary-soft);color:var(--c-primary-dark);margin-bottom:18px;
}
.card .ico svg{width:22px;height:22px;}
.card h3{margin-bottom:10px;}
.card p{color:var(--c-text-2);font-size:15px;}
.card .card-foot{margin-top:18px;padding-top:14px;border-top:1px dashed var(--c-line);display:flex;flex-wrap:wrap;gap:8px;}

/* ---------- 图文交错详解 ---------- */
.detail-block{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding:44px 0;border-bottom:1px solid var(--c-line);}
.detail-block:last-child{border-bottom:0;padding-bottom:0;}
.detail-block:first-child{padding-top:0;}
.detail-block.is-rev .detail-media{order:2;}
.detail-index{
  font-family:var(--mono);font-size:13px;font-weight:700;color:var(--c-primary-dark);
  letter-spacing:.08em;margin-bottom:12px;display:block;
}
.detail-block h3{font-size:24px;margin-bottom:14px;}
.detail-block p{color:var(--c-text-2);margin-bottom:16px;}
.detail-list li{position:relative;padding-left:20px;color:var(--c-text-2);font-size:15px;margin-bottom:9px;}
.detail-list li::before{content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:2px;background:var(--c-primary);transform:rotate(45deg);}
.detail-media{position:relative;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-1);}
.detail-media img{width:100%;height:330px;object-fit:cover;}
.detail-media .tag{
  position:absolute;left:16px;top:16px;background:rgba(12,22,32,.78);color:#fff;
  font-family:var(--mono);font-size:12px;padding:5px 11px;border-radius:999px;
}

/* ---------- 支持能力对照 ---------- */
.compare-wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:32px;}
.compare-panel{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);padding:30px 28px;box-shadow:var(--shadow-1);}
.compare-panel h3{display:flex;align-items:center;gap:10px;margin-bottom:8px;}
.compare-panel .hint{font-size:13px;color:var(--c-text-3);margin-bottom:20px;}
.check-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:13px 0;border-bottom:1px solid var(--c-line);font-size:15px;color:var(--c-text-2);
}
.check-list li:last-child{border-bottom:0;padding-bottom:0;}
.check-list .mark{
  flex:0 0 22px;width:22px;height:22px;border-radius:50%;margin-top:2px;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(18,161,80,.12);color:var(--c-success);font-size:12px;font-weight:800;
}
.check-list .mark--note{background:rgba(232,162,0,.15);color:#9A6B00;}
.check-list strong{color:var(--c-text);font-weight:700;}

/* ---------- 参数条 ---------- */
.stat-strip{
  background:var(--c-ink);border-radius:var(--radius);padding:38px 32px;
  display:grid;grid-template-columns:repeat(4,1fr);gap:28px;color:#fff;
  box-shadow:var(--shadow-2);
}
.stat-strip .item{border-left:2px solid rgba(255,255,255,.14);padding-left:18px;}
.stat-strip .item:first-child{border-left:0;padding-left:0;}
.stat-strip .k{font-size:12px;letter-spacing:.08em;color:rgba(255,255,255,.6);margin-bottom:6px;}
.stat-strip .v{font-family:var(--mono);font-size:26px;font-weight:800;color:#fff;}
.stat-strip .v small{font-size:13px;font-weight:600;color:rgba(255,255,255,.65);margin-left:4px;}
.stat-strip .note{grid-column:1 / -1;font-size:13px;color:rgba(255,255,255,.55);border-top:1px solid rgba(255,255,255,.12);padding-top:16px;}

/* ---------- FAQ ---------- */
.faq{display:flex;flex-direction:column;gap:12px;}
.faq-item{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius-sm);overflow:hidden;transition:box-shadow .22s ease,border-color .22s ease;}
.faq-item:hover{border-color:#C6DBE4;}
.faq-item.is-open{box-shadow:var(--shadow-1);border-color:var(--c-primary);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:18px 22px;text-align:left;font-size:16px;font-weight:700;color:var(--c-text);
}
.faq-q:hover{color:var(--c-primary-dark);}
.faq-icon{
  flex:0 0 26px;width:26px;height:26px;border-radius:50%;
  background:var(--c-primary-soft);color:var(--c-primary-dark);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:16px;font-weight:700;line-height:1;
  transition:transform .28s ease,background-color .28s ease,color .28s ease;
}
.faq-item.is-open .faq-icon{transform:rotate(180deg);background:var(--c-primary);color:#fff;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq-a p{padding:0 22px 20px;color:var(--c-text-2);font-size:15px;}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--radius);
  background:var(--c-primary-soft);
  padding:52px 48px;display:flex;align-items:center;justify-content:space-between;gap:36px;
  border:1px solid #CDE6EA;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(135deg,rgba(15,166,184,.08) 0 2px,transparent 2px 12px);
  opacity:.9;pointer-events:none;
}
.cta-band > *{position:relative;}
.cta-band h2{font-size:26px;margin-bottom:8px;}
.cta-band p{color:var(--c-text-2);max-width:560px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-ink);color:rgba(255,255,255,.72);padding:72px 0 28px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.12);}
.footer-brand .logo{color:#fff;font-size:17px;margin-bottom:16px;}
.footer-brand .logo:hover{color:var(--c-primary);}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:340px;}
.footer-col h4{font-size:14px;color:#fff;letter-spacing:.05em;margin-bottom:18px;font-weight:700;}
.footer-col ul li{margin-bottom:11px;font-size:14px;}
.footer-col a{color:rgba(255,255,255,.65);}
.footer-col a:hover{color:var(--c-primary);}
.footer-col .mono{font-size:13px;color:rgba(255,255,255,.6);}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  padding-top:24px;font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom a{color:rgba(255,255,255,.62);}
.footer-bottom a:hover{color:var(--c-primary);}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s ease,transform .4s ease;}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important;}
  .reveal{opacity:1;transform:none;}
}

/* ---------- 响应式 ---------- */
@media (max-width:1280px){
  .container{max-width:1140px;}
}
@media (max-width:1024px){
  .nav-links{display:none;}
  .menu-btn{display:inline-flex;}
  .section{padding:72px 0;}
  .cat-hero{padding:28px 0 64px;}
  .cat-hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-media .frame img{height:320px;}
  .hero-float{left:16px;bottom:16px;}
  .hero-float--top{right:16px;top:16px;}
  .grid-4{grid-template-columns:repeat(2,1fr);}
  .grid-3{grid-template-columns:repeat(2,1fr);}
  .detail-block{gap:36px;}
  .compare-wrap{grid-template-columns:1fr;}
  .stat-strip{grid-template-columns:repeat(2,1fr);gap:24px;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:40px 32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:768px){
  h1{font-size:30px;}
  h2{font-size:24px;}
  .section{padding:56px 0;}
  .container{padding:0 18px;}
  .grid-4,.grid-3,.grid-2{grid-template-columns:1fr;}
  .detail-block{grid-template-columns:1fr;gap:24px;padding:32px 0;}
  .detail-block.is-rev .detail-media{order:0;}
  .detail-media img{height:240px;}
  .hero-btns .btn{width:100%;}
  .hero-spec{gap:10px 18px;font-size:12px;}
  .stat-strip{padding:28px 22px;}
  .stat-strip .v{font-size:22px;}
  .cta-band h2{font-size:22px;}
  .footer-grid{grid-template-columns:1fr;}
}
@media (max-width:520px){
  .header-inner{gap:12px;height:56px;}
  .logo{font-size:15px;}
  .search-box{display:none!important;}
  .hero-media .frame img{height:230px;}
  .hero-float .v{font-size:17px;}
  .card{padding:22px 20px;}
  .compare-panel{padding:22px 20px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-bottom{flex-direction:column;}
}

/* roulang page: category2 */
:root{
  --ice:#0FA6B8;
  --ice-dark:#0A7C8C;
  --ice-soft:#E3F3F6;
  --orange:#FF5A36;
  --orange-dark:#E8431F;
  --magenta:#E6317A;
  --ink:#0C1620;
  --ink-2:#132430;
  --bg:#F3F8FB;
  --bg-alt:#E7F2F6;
  --text:#0E1F29;
  --text-2:#566C7A;
  --text-3:#8AA0AD;
  --line:#D7E4EB;
  --success:#12A150;
  --warn:#E8A200;
  --radius:16px;
  --radius-sm:10px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(12,22,32,.06),0 12px 32px -12px rgba(12,22,32,.18);
  --shadow-2:0 2px 4px rgba(12,22,32,.08),0 20px 44px -14px rgba(12,22,32,.26);
  --sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --nav-h:64px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none;transition:color .2s ease}
a:hover{color:var(--ice)}
button,input{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--ice);outline-offset:2px;border-radius:4px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.01em}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media(min-width:1440px){.container{max-width:1280px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(243,248,251,.86);
  backdrop-filter:saturate(160%) blur(6px);
  border-bottom:1px solid transparent;
  transition:background .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.site-header.is-scrolled{
  background:#fff;
  border-bottom-color:var(--line);
  box-shadow:0 6px 20px -14px rgba(12,22,32,.35);
}
.header-inner{
  height:var(--nav-h);
  display:flex;align-items:center;gap:24px;
  position:relative;
}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:17px;letter-spacing:-.01em;color:var(--text)}
.logo:hover{color:var(--text)}
.logo-mark{
  width:32px;height:32px;border-radius:9px;
  background:linear-gradient(135deg,var(--ice) 0%,var(--ice-dark) 100%);
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:0 6px 14px -6px rgba(15,166,184,.75);
  flex:0 0 auto;
}
.logo-mark svg{width:18px;height:18px}
.logo-text{white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:12px}
.nav-links a{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  font-size:15px;font-weight:600;color:var(--text-2);
  border-radius:8px;
  transition:color .2s ease,background .2s ease;
}
.nav-links a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--ice);border-radius:2px;transform:scaleX(0);transform-origin:left;
  transition:transform .22s ease;
}
.nav-links a:hover{color:var(--text);background:rgba(15,166,184,.07)}
.nav-links a:hover::after,.nav-links a.is-active::after{transform:scaleX(1)}
.nav-links a.is-active{color:var(--text)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.icon-btn{
  width:38px;height:38px;border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--text-2);border:1px solid transparent;
  transition:color .2s ease,background .2s ease,border-color .2s ease;
}
.icon-btn:hover{color:var(--ice-dark);background:var(--ice-soft);border-color:var(--line)}
.icon-btn svg{width:18px;height:18px}
.header-search{
  position:absolute;top:calc(100% + 10px);right:24px;width:280px;
  background:#fff;border:1px solid var(--line);border-radius:14px;
  box-shadow:var(--shadow-2);padding:10px;
  display:none;
}
.header-search.is-open{display:block}
.header-search input{
  width:100%;height:44px;border-radius:var(--radius-sm);
  border:1px solid var(--line);background:var(--bg);
  padding:0 14px;font-size:14px;outline:none;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.header-search input:focus{border-color:var(--ice);box-shadow:0 0 0 3px rgba(15,166,184,.15)}
.menu-toggle{display:none}
.drawer{
  position:fixed;inset:0;z-index:80;background:rgba(12,22,32,.5);
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;
}
.drawer.is-open{opacity:1;visibility:visible}
.drawer-panel{
  position:absolute;top:0;right:0;bottom:0;width:min(320px,86vw);
  background:#fff;padding:20px;display:flex;flex-direction:column;gap:18px;
  transform:translateX(100%);transition:transform .3s ease;
  overflow-y:auto;
}
.drawer.is-open .drawer-panel{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-nav{display:flex;flex-direction:column;gap:2px}
.drawer-nav a{padding:12px 10px;border-radius:10px;font-weight:600;color:var(--text-2);border-bottom:1px solid var(--line)}
.drawer-nav a:last-child{border-bottom:0}
.drawer-nav a.is-active{color:var(--ice-dark);background:var(--ice-soft)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-weight:700;font-size:15px;line-height:1;
  padding:14px 24px;border-radius:var(--radius-pill);
  border:1.5px solid transparent;
  transition:transform .18s ease,box-shadow .22s ease,background .22s ease,color .22s ease,border-color .22s ease;
  white-space:nowrap;
}
.btn svg{width:17px;height:17px}
.btn-primary{background:var(--orange);color:#fff;box-shadow:0 10px 24px -12px rgba(255,90,54,.95)}
.btn-primary:hover{background:var(--orange-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:translateY(1px);box-shadow:0 4px 12px -8px rgba(255,90,54,.9)}
.btn-outline{border-color:var(--ice);color:var(--ice-dark);background:transparent}
.btn-outline:hover{background:rgba(15,166,184,.08);color:var(--ice-dark);transform:translateY(-1px)}
.btn-light{background:#fff;color:var(--ink);border-color:transparent}
.btn-light:hover{background:#F1F6F9;color:var(--ink);transform:translateY(-1px)}
.btn-line-light{border-color:rgba(255,255,255,.55);color:#fff;background:transparent}
.btn-line-light:hover{background:rgba(255,255,255,.12);color:#fff;transform:translateY(-1px)}
.btn-sm{padding:10px 18px;font-size:14px}
.btn-lg{padding:17px 30px;font-size:16px}
.btn-block{width:100%}

/* ---------- badges ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 11px;border-radius:var(--radius-pill);
  font-size:12px;font-weight:700;letter-spacing:.02em;line-height:1.5;
}
.badge-ice{background:var(--ice-soft);color:var(--ice-dark)}
.badge-magenta{background:rgba(230,49,122,.12);color:#B72360}
.badge-dark{background:var(--ink);color:#fff}
.badge-line{background:#fff;color:var(--text-2);border:1px solid var(--line)}
.badge-dot{width:6px;height:6px;border-radius:50%;background:currentColor;display:inline-block}

/* ---------- hero ---------- */
.hero{
  position:relative;
  padding:calc(var(--nav-h) + 56px) 0 0;
  overflow:hidden;
  background:
    radial-gradient(1100px 420px at 88% -12%,rgba(15,166,184,.14),transparent 62%),
    linear-gradient(180deg,#FFFFFF 0%,var(--bg) 78%);
}
.hero::after{
  content:"";position:absolute;inset:auto 0 0 0;height:24px;
  background:linear-gradient(180deg,rgba(15,166,184,.28),rgba(243,248,251,0));
  pointer-events:none;
}
.hero-grid{
  display:grid;grid-template-columns:55fr 45fr;gap:48px;align-items:center;
  padding-bottom:72px;
}
.hero-copy{max-width:620px}
.badge-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px}
.hero-title{
  font-size:40px;line-height:1.2;font-weight:800;letter-spacing:-.02em;
  margin-bottom:16px;
}
.hero-title em{font-style:normal;color:var(--ice-dark)}
.hero-sub{font-size:17px;color:var(--text-2);margin-bottom:28px;max-width:520px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:10px 22px;
  padding-top:20px;border-top:1px dashed var(--line);
  font-size:13px;color:var(--text-2);
}
.hero-meta span{display:inline-flex;align-items:center;gap:7px}
.hero-meta b{font-family:var(--mono);color:var(--text);font-weight:700}
.star{color:var(--magenta);letter-spacing:1px}
.hero-visual{position:relative}
.hero-img{
  position:relative;border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow-2);
  clip-path:polygon(0 0,100% 0,100% 88%,0 100%);
  background:var(--ice-soft);
  aspect-ratio:16/11;
}
.hero-img img{width:100%;height:100%;object-fit:cover}
.hero-img::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(140deg,rgba(15,166,184,.34),rgba(12,22,32,.34));
}
.float-card{
  position:absolute;background:#fff;border:1px solid var(--line);
  border-radius:14px;box-shadow:var(--shadow-1);padding:12px 14px;
  font-size:12px;color:var(--text-2);line-height:1.5;
}
.float-card b{display:block;font-family:var(--mono);font-size:16px;color:var(--text);font-weight:800}
.float-card-a{top:16px;left:-18px}
.float-card-b{bottom:34px;left:-26px}
.qr-block{
  position:absolute;right:14px;bottom:-6px;width:120px;padding:10px;
  background:#fff;border-radius:14px;border:1px solid var(--line);
  box-shadow:var(--shadow-1);text-align:center;
}
.qr-block img{width:100%;border-radius:8px;aspect-ratio:1/1;object-fit:cover}
.qr-block span{display:block;margin-top:6px;font-size:11px;color:var(--text-3)}

/* ---------- sections ---------- */
.section{padding:96px 0}
.section-alt{background:var(--bg-alt)}
.section-head{max-width:720px;margin-bottom:44px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;color:var(--ice-dark);
  letter-spacing:.06em;margin-bottom:12px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--ice);border-radius:2px}
.section-title{font-size:30px;line-height:1.3;font-weight:800;letter-spacing:-.015em;margin-bottom:12px}
.section-desc{font-size:16px;color:var(--text-2)}

/* ---------- download band ---------- */
.dl-band{
  background:var(--ink);
  color:#fff;
  position:relative;overflow:hidden;
  padding:80px 0;
}
.dl-band::before{
  content:"";position:absolute;inset:0;
  background:
    repeating-linear-gradient(115deg,rgba(255,255,255,.035) 0 2px,transparent 2px 26px);
  pointer-events:none;
}
.dl-band .container{position:relative;z-index:1}
.dl-grid{display:grid;grid-template-columns:1fr 320px;gap:48px;align-items:center}
.dl-band h2{font-size:28px;font-weight:800;line-height:1.32;margin-bottom:12px}
.dl-band p{color:rgba(255,255,255,.72);font-size:15px;margin-bottom:26px;max-width:520px}
.dl-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:22px}
.dl-note{font-size:13px;color:rgba(255,255,255,.55)}
.dl-note a{color:#7FE0EC;text-decoration:underline;text-underline-offset:3px}
.dl-side{
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.14);
  border-radius:var(--radius);padding:20px;
}
.dl-side .qr-block{position:static;width:100%;max-width:150px;margin:0 auto 16px}
.dl-side .qr-block span{color:var(--text-3)}
.dl-lines{display:flex;flex-direction:column;gap:9px;font-size:13px}
.dl-lines div{display:flex;justify-content:space-between;gap:12px;color:rgba(255,255,255,.65)}
.dl-lines b{font-family:var(--mono);color:#fff;font-weight:700}

/* ---------- timeline ---------- */
.timeline{position:relative;max-width:880px}
.timeline-item{position:relative;padding:0 0 34px 76px}
.timeline-item:last-child{padding-bottom:0}
.timeline-item::before{
  content:"";position:absolute;left:21px;top:44px;bottom:0;width:2px;
  background:linear-gradient(180deg,var(--ice),rgba(15,166,184,.15));
}
.timeline-item:last-child::before{display:none}
.timeline-num{
  position:absolute;left:0;top:0;
  width:44px;height:44px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:#fff;border:2px solid var(--ice);color:var(--ice-dark);
  font-family:var(--mono);font-weight:800;font-size:14px;
  box-shadow:0 8px 18px -12px rgba(15,166,184,.9);
}
.timeline-body{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:20px 22px;box-shadow:var(--shadow-1);
  transition:transform .22s ease,box-shadow .22s ease;
}
.timeline-body:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.timeline-body h3{font-size:19px;font-weight:700;margin-bottom:8px}
.timeline-body p{color:var(--text-2);font-size:15px}
.timeline-body .badge{margin-top:12px}

/* ---------- spec cards ---------- */
.spec-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.spec-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  display:flex;flex-direction:column;
}
.spec-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#C3DAE3}
.spec-head{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.spec-icon{
  width:38px;height:38px;border-radius:11px;background:var(--ice-soft);
  display:inline-flex;align-items:center;justify-content:center;color:var(--ice-dark);
  flex:0 0 auto;
}
.spec-icon svg{width:19px;height:19px}
.spec-head h3{font-size:16px;font-weight:800}
.spec-list{display:flex;flex-direction:column}
.spec-row{
  display:flex;justify-content:space-between;gap:10px;align-items:baseline;
  padding:10px 0;border-bottom:1px solid var(--line);font-size:13px;color:var(--text-2);
}
.spec-row:last-child{border-bottom:0;padding-bottom:0}
.spec-row b{font-family:var(--mono);color:var(--text);font-weight:700;text-align:right}

/* ---------- check list ---------- */
.check-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 28px;max-width:900px}
.check-list li{
  position:relative;padding-left:32px;font-size:15px;color:var(--text-2);
}
.check-list li::before{
  content:"";position:absolute;left:0;top:4px;width:20px;height:20px;border-radius:50%;
  background:var(--ice-soft);
}
.check-list li::after{
  content:"";position:absolute;left:6px;top:10px;width:8px;height:4px;
  border-left:2px solid var(--ice-dark);border-bottom:2px solid var(--ice-dark);
  transform:rotate(-45deg);
}
.check-list li strong{color:var(--text);font-weight:700}

/* ---------- accordion ---------- */
.acc{display:flex;flex-direction:column;gap:12px;max-width:900px}
.acc-item{
  background:#fff;border:1px solid var(--line);border-radius:14px;
  overflow:hidden;box-shadow:var(--shadow-1);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.acc-item[open]{border-color:#BFDCE4;box-shadow:var(--shadow-2)}
.acc-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;gap:14px;
  padding:18px 22px;font-weight:700;font-size:16px;
}
.acc-item summary::-webkit-details-marker{display:none}
.acc-item summary:hover{background:rgba(15,166,184,.05)}
.acc-plus{
  margin-left:auto;width:26px;height:26px;border-radius:50%;
  background:var(--ice-soft);color:var(--ice-dark);
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;
  font-size:16px;font-weight:800;line-height:1;
  transition:transform .25s ease;
}
.acc-item[open] .acc-plus{transform:rotate(180deg)}
.acc-body{padding:0 22px 20px 22px;color:var(--text-2);font-size:15px}
.acc-body p+p{margin-top:10px}
.acc-body code{
  font-family:var(--mono);font-size:13px;background:var(--bg-alt);
  padding:2px 6px;border-radius:6px;color:var(--ice-dark);
}

/* ---------- notice boxes ---------- */
.notice{
  border-left:3px solid var(--ice);background:var(--ice-soft);
  border-radius:0 12px 12px 0;padding:16px 20px;font-size:15px;color:var(--text-2);
  max-width:900px;
}
.notice.warn{border-left-color:var(--warn);background:rgba(232,162,0,.09)}
.notice strong{color:var(--text)}
.notice+.notice{margin-top:12px}

/* ---------- update table ---------- */
.update-wrap{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow-1);
}
.update-head,.update-row{
  display:grid;grid-template-columns:150px 1fr 120px 120px;gap:16px;
  padding:15px 22px;align-items:center;
}
.update-head{
  background:var(--ice-soft);font-size:13px;font-weight:700;color:var(--ice-dark);
  letter-spacing:.02em;
}
.update-row{border-top:1px solid var(--line);font-size:14px;color:var(--text-2);transition:background .2s ease}
.update-row:hover{background:#F7FBFD}
.update-row b{color:var(--text);font-family:var(--mono);font-weight:700}
.update-row .tag{
  display:inline-block;font-size:11px;font-weight:700;padding:3px 9px;border-radius:var(--radius-pill);
  background:rgba(18,161,80,.12);color:var(--success);
}

/* ---------- CTA ---------- */
.cta-band{
  background:linear-gradient(135deg,#DFF1F5 0%,#EAF6F8 60%,#F4FAFB 100%);
  position:relative;overflow:hidden;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(125deg,rgba(15,166,184,.07) 0 2px,transparent 2px 22px);
  pointer-events:none;
}
.cta-inner{
  position:relative;z-index:1;
  padding:72px 0;display:grid;grid-template-columns:1fr auto;gap:32px;align-items:center;
}
.cta-inner h2{font-size:28px;font-weight:800;line-height:1.32;margin-bottom:10px}
.cta-inner p{color:var(--text-2);font-size:16px;max-width:560px}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.68);padding:64px 0 26px;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px}
.footer-brand .logo{color:#fff;margin-bottom:16px}
.footer-brand .logo:hover{color:#fff}
.footer-brand p{color:rgba(255,255,255,.6);line-height:1.8;font-size:13.5px;max-width:340px}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{color:rgba(255,255,255,.66);font-size:13.5px}
.footer-col a:hover{color:#7FE0EC}
.footer-col .mono{font-size:13px;color:rgba(255,255,255,.55)}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:12.5px;color:rgba(255,255,255,.5);
}

/* ---------- animations ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s ease,transform .4s ease}
.reveal.is-in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  *{animation:none!important;transition:none!important}
}

/* ---------- responsive ---------- */
@media(max-width:1280px){
  .float-card-a{left:-8px}
  .float-card-b{left:-14px}
}
@media(max-width:1024px){
  .container{padding:0 20px}
  .nav-links{display:none}
  .menu-toggle{display:inline-flex}
  .hero{padding-top:calc(var(--nav-h) + 40px)}
  .hero-grid{grid-template-columns:1fr;gap:36px;padding-bottom:56px}
  .hero-copy{max-width:none}
  .hero-visual{max-width:560px;margin:0 auto;width:100%}
  .section{padding:72px 0}
  .dl-grid{grid-template-columns:1fr;gap:32px}
  .spec-grid{grid-template-columns:repeat(2,1fr)}
  .cta-inner{grid-template-columns:1fr;padding:56px 0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media(max-width:768px){
  .hero-title{font-size:32px}
  .section-title{font-size:24px}
  .dl-band h2,.cta-inner h2{font-size:23px}
  .section{padding:56px 0}
  .check-list{grid-template-columns:1fr}
  .update-head{display:none}
  .update-row{grid-template-columns:1fr;gap:6px;padding:16px 20px}
  .update-row span::before{content:attr(data-label) "：";color:var(--text-3);font-size:12px}
  .timeline-item{padding-left:60px}
  .timeline-num{width:38px;height:38px;font-size:13px}
  .timeline-item::before{left:18px;top:38px}
  .float-card{position:static;display:inline-block;margin:12px 10px 0 0}
  .qr-block{position:static;margin:12px 0 0;width:130px}
}
@media(max-width:520px){
  .container{padding:0 16px}
  .logo{font-size:15px}
  .logo-text{max-width:150px;overflow:hidden;text-overflow:ellipsis}
  .hero-title{font-size:28px;line-height:1.28}
  .hero-sub{font-size:15.5px}
  .btn{width:100%;padding:14px 20px}
  .btn-sm{width:auto;padding:10px 16px}
  .hero-actions{flex-direction:column}
  .dl-actions{flex-direction:column}
  .spec-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .header-search{right:16px;left:16px;width:auto}
  .acc-item summary{padding:16px;font-size:15px}
  .acc-body{padding:0 16px 18px}
  .timeline-item{padding-left:52px}
  .timeline-num{width:34px;height:34px;font-size:12px}
  .timeline-item::before{left:16px;top:34px}
}

/* roulang page: category3 */
:root{
  --brand:#0FA6B8;
  --brand-dark:#0A7C8C;
  --brand-soft:#E3F3F6;
  --accent:#FF5A36;
  --accent-dark:#E4441F;
  --magenta:#E6317A;
  --ink:#0C1620;
  --bg:#F3F8FB;
  --bg-alt:#E7F2F6;
  --text:#0E1F29;
  --muted:#566C7A;
  --weak:#8AA0AD;
  --line:#D7E4EB;
  --ok:#12A150;
  --warn:#E8A200;
  --radius-card:16px;
  --radius-img:12px;
  --radius-pill:999px;
  --radius-btn:10px;
  --shadow-1:0 1px 2px rgba(12,22,32,.06),0 12px 32px -12px rgba(12,22,32,.18);
  --shadow-2:0 2px 4px rgba(12,22,32,.08),0 22px 48px -14px rgba(12,22,32,.26);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --space-1:8px;
  --space-2:16px;
  --space-3:24px;
  --space-4:32px;
  --space-5:48px;
  --space-6:64px;
  --space-7:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease}
a:hover{color:var(--brand)}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit}
input{font-family:inherit;font-size:inherit}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.25;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media(min-width:1440px){.container{max-width:1280px}}
.section{padding:96px 0}
.section-alt{background:var(--bg-alt)}
.section-head{max-width:760px;margin-bottom:48px}
.section-head h2{font-size:30px;line-height:1.3}
.section-head p{margin-top:12px;color:var(--muted);font-size:16px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.06em;color:var(--brand-dark);
  background:var(--brand-soft);border-radius:var(--radius-pill);padding:6px 14px;margin-bottom:16px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:700;white-space:nowrap;
  transition:transform .2s ease,box-shadow .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease;
}
.btn svg{width:18px;height:18px;flex:none}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 8px 20px -10px rgba(255,90,54,.9)}
.btn-primary:hover{background:var(--accent-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;color:var(--brand-dark);border:1.5px solid var(--brand)}
.btn-ghost:hover{background:rgba(15,166,184,.08);color:var(--brand-dark);transform:translateY(-1px)}
.btn-ghost-light{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.5)}
.btn-ghost-light:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff}
.btn-sm{height:38px;padding:0 18px;font-size:13px}
.btn-lg{height:56px;padding:0 34px;font-size:16px}
.btn-block{width:100%}
.text-link{color:var(--brand-dark);font-weight:600;text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1.5px}
.text-link:hover{color:var(--accent)}

/* ---------- 徽章 ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;font-size:11px;font-weight:700;letter-spacing:.02em;padding:4px 10px;border-radius:var(--radius-pill)}
.badge-brand{background:var(--brand-soft);color:var(--brand-dark)}
.badge-magenta{background:rgba(230,49,122,.12);color:#B42460}
.badge-ink{background:rgba(255,255,255,.14);color:#fff}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(243,248,251,.88);
  backdrop-filter:blur(8px);
  border-bottom:1px solid transparent;
  transition:background-color .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled{
  background:#fff;border-bottom:1px solid var(--line);
  box-shadow:0 6px 20px -14px rgba(12,22,32,.4);
}
.header-inner{display:flex;align-items:center;gap:32px;height:64px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:800;letter-spacing:-.01em;color:var(--ink);flex:none}
.logo:hover{color:var(--ink)}
.logo-mark{
  width:32px;height:32px;border-radius:10px;flex:none;
  background:linear-gradient(150deg,var(--brand),var(--brand-dark));
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:0 6px 14px -8px rgba(10,124,140,.9);
}
.logo-mark svg{width:19px;height:19px}
.nav-links{display:flex;align-items:center;gap:26px;margin-right:auto}
.nav-links a{
  position:relative;font-size:15px;font-weight:600;color:var(--muted);padding:6px 0;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .25s ease;
}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.is-active{color:var(--ink)}
.nav-links a.is-active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:12px;flex:none}
.icon-btn{
  width:40px;height:40px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;
  color:var(--muted);transition:background-color .2s ease,color .2s ease;
}
.icon-btn:hover{background:var(--brand-soft);color:var(--brand-dark)}
.icon-btn svg{width:19px;height:19px}
.nav-toggle{display:none}
.search-bar{
  overflow:hidden;max-height:0;opacity:0;
  transition:max-height .3s ease,opacity .25s ease;
}
.search-bar.is-open{max-height:80px;opacity:1}
.search-bar .container{display:flex;justify-content:flex-end;padding-bottom:14px}
.search-field{
  position:relative;width:240px;
}
.search-field input{
  width:100%;height:44px;border-radius:10px;border:1px solid var(--line);
  background:#fff;padding:0 16px 0 40px;color:var(--text);outline:none;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search-field input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(15,166,184,.15)}
.search-field svg{position:absolute;left:13px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--weak)}

/* 移动抽屉 */
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(88vw,340px);z-index:90;
  background:#fff;box-shadow:-24px 0 48px -24px rgba(12,22,32,.5);
  transform:translateX(102%);transition:transform .3s ease;
  display:flex;flex-direction:column;padding:20px 20px 24px;overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-group{margin-bottom:22px}
.drawer-group h4{font-size:12px;color:var(--weak);letter-spacing:.08em;font-weight:700;margin-bottom:10px}
.drawer-group a{display:block;padding:11px 12px;border-radius:10px;font-weight:600;color:var(--text)}
.drawer-group a:hover{background:var(--brand-soft);color:var(--brand-dark)}
.drawer-group a.is-active{background:var(--brand-soft);color:var(--brand-dark)}
.drawer-foot{margin-top:auto;padding-top:20px}

/* ---------- Hero ---------- */
.hero{position:relative;padding:56px 0 0;overflow:hidden;background:linear-gradient(180deg,#fff 0%,var(--bg) 100%)}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center right;
  opacity:.07;pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:55fr 45fr;gap:56px;align-items:center}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:20px}
.hero h1{font-size:40px;line-height:1.2;letter-spacing:-.02em}
.hero-sub{margin-top:18px;font-size:17px;color:var(--muted);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:24px;margin-top:28px;padding-top:20px;
  border-top:1px solid var(--line);font-size:13px;color:var(--muted);
}
.hero-meta span{display:inline-flex;align-items:center;gap:6px}
.hero-meta strong{color:var(--text);font-weight:700}
.hero-visual{position:relative}
.hero-shot{
  position:relative;border-radius:20px;overflow:hidden;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 34px),calc(100% - 34px) 100%,0 100%);
  box-shadow:var(--shadow-2);
}
.hero-shot img{width:100%;height:380px;object-fit:cover}
.hero-shot::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(160deg,rgba(15,166,184,.34),rgba(12,22,32,.28));
}
.float-card{
  position:absolute;background:#fff;border:1px solid var(--line);border-radius:14px;
  box-shadow:var(--shadow-1);padding:12px 16px;font-size:12px;color:var(--muted);
}
.float-card strong{display:block;font-size:16px;color:var(--text);font-weight:800}
.float-card-a{left:-18px;top:34px}
.float-card-b{left:14px;bottom:-18px}
.hero-strip{height:24px;margin-top:56px;background:linear-gradient(180deg,var(--brand),rgba(15,166,184,0))}

/* ---------- 锚点条 ---------- */
.anchor-bar{
  position:sticky;top:64px;z-index:40;background:#fff;border-bottom:1px solid var(--line);
}
.anchor-scroll{
  display:flex;gap:10px;overflow-x:auto;padding:12px 0;
  scrollbar-width:none;-webkit-overflow-scrolling:touch;
}
.anchor-scroll::-webkit-scrollbar{display:none}
.anchor-scroll a{
  flex:none;font-size:13px;font-weight:600;color:var(--muted);
  border:1px solid var(--line);border-radius:var(--radius-pill);padding:7px 16px;
  transition:all .2s ease;
}
.anchor-scroll a:hover{border-color:var(--brand);color:var(--brand-dark);background:var(--brand-soft)}

/* ---------- 教程块 ---------- */
.tutorial{display:grid;grid-template-columns:46fr 54fr;gap:48px;align-items:center;padding:44px 0;border-bottom:1px solid var(--line)}
.tutorial:last-child{border-bottom:0}
.tutorial.is-reverse .tutorial-media{order:2}
.tutorial-media{position:relative;border-radius:var(--radius-img);overflow:hidden;box-shadow:var(--shadow-1);background:var(--brand-soft)}
.tutorial-media img{width:100%;height:300px;object-fit:cover;border-radius:var(--radius-img)}
.tutorial-media .step-num{
  position:absolute;left:16px;top:16px;z-index:2;
  background:#fff;color:var(--brand-dark);font-family:var(--font-mono);
  font-size:13px;font-weight:700;padding:6px 12px;border-radius:var(--radius-pill);
  clip-path:polygon(6px 0,100% 0,100% 100%,0 100%,0 6px);
}
.tutorial-body h3{font-size:22px;margin-bottom:14px}
.tutorial-body p{color:var(--muted);margin-bottom:14px}
.check-list li{position:relative;padding-left:26px;margin-bottom:10px;color:var(--text);font-size:15px}
.check-list li::before{
  content:"";position:absolute;left:0;top:9px;width:14px;height:14px;border-radius:4px;
  background:var(--brand-soft);
  box-shadow:inset 0 0 0 1.5px var(--brand);
}
.check-list li::after{
  content:"";position:absolute;left:4.5px;top:12.5px;width:5px;height:8px;
  border-right:2px solid var(--brand-dark);border-bottom:2px solid var(--brand-dark);
  transform:rotate(40deg);
}

/* ---------- 提示框 ---------- */
.notice{display:flex;gap:14px;padding:18px 20px;border-radius:12px;background:#fff;border:1px solid var(--line);border-left:4px solid var(--brand);margin-bottom:16px}
.notice.is-warn{border-left-color:var(--warn)}
.notice.is-alert{border-left-color:var(--accent)}
.notice-icon{flex:none;width:20px;height:20px;color:var(--brand-dark);margin-top:2px}
.notice.is-warn .notice-icon{color:var(--warn)}
.notice.is-alert .notice-icon{color:var(--accent)}
.notice strong{display:block;margin-bottom:4px;font-size:15px}
.notice p{font-size:14px;color:var(--muted);line-height:1.7}

/* ---------- 速查表 ---------- */
.spec-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);overflow:hidden}
.spec-row{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:16px 24px;border-bottom:1px solid var(--line);transition:background-color .2s ease}
.spec-row:last-child{border-bottom:0}
.spec-row:hover{background:var(--brand-soft)}
.spec-row .label{font-size:15px;font-weight:600}
.spec-row .label small{display:block;font-size:12.5px;font-weight:400;color:var(--weak);margin-top:2px}
.spec-row .value{font-family:var(--font-mono);font-size:13.5px;color:var(--brand-dark);font-weight:600;text-align:right;flex:none}

/* ---------- 手势卡 ---------- */
.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{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px;box-shadow:var(--shadow-1);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#C6DAE4}
.card h3{font-size:17px;margin-bottom:10px}
.card p{font-size:14.5px;color:var(--muted)}
.card-icon{
  width:42px;height:42px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand-dark);margin-bottom:16px;
}
.card-icon svg{width:21px;height:21px}
.card-num{font-family:var(--font-mono);font-size:26px;font-weight:800;color:var(--brand-dark);margin-bottom:6px}

/* ---------- FAQ ---------- */
.faq-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);overflow:hidden}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:last-child{border-bottom:0}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 24px;text-align:left;font-size:16px;font-weight:700;color:var(--text);
  transition:background-color .2s ease;
}
.faq-q:hover{background:var(--brand-soft)}
.faq-icon{position:relative;flex:none;width:22px;height:22px;transition:transform .3s ease}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand-dark);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:14px;height:2px}
.faq-icon::after{width:2px;height:14px;transition:opacity .3s ease}
.faq-item.is-open .faq-icon{transform:rotate(180deg)}
.faq-item.is-open .faq-icon::after{opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-item.is-open .faq-a{max-height:320px}
.faq-a p{padding:0 24px 22px;color:var(--muted);font-size:15px}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;background:var(--brand-soft);overflow:hidden;
  padding:72px 0;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(115deg,rgba(15,166,184,.12) 0 2px,transparent 2px 22px);
  pointer-events:none;
}
.cta-inner{position:relative;text-align:center;max-width:720px;margin:0 auto}
.cta-inner h2{font-size:30px}
.cta-inner p{margin-top:14px;color:var(--muted)}
.cta-actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;margin-top:28px}

/* ---------- 深色下载块 ---------- */
.dark-band{background:var(--ink);color:#fff;padding:80px 0}
.dark-band h2{font-size:28px}
.dark-band p{color:rgba(255,255,255,.68)}
.dark-inner{display:grid;grid-template-columns:1.4fr 1fr;gap:48px;align-items:center}
.dark-meta{margin-top:26px;display:flex;flex-wrap:wrap;gap:12px 32px;font-size:13px;color:rgba(255,255,255,.7);font-family:var(--font-mono)}
.qr-box{
  background:#fff;border-radius:16px;padding:16px;width:160px;margin-left:auto;
  display:flex;flex-direction:column;align-items:center;gap:8px;
}
.qr-box img{width:120px;height:120px;object-fit:cover;border-radius:8px}
.qr-box span{font-size:11.5px;color:var(--muted)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer-brand .logo{color:#fff;margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);max-width:320px}
.footer-col h4{font-size:14px;color:#fff;margin-bottom:16px;font-weight:700}
.footer-col ul li{margin-bottom:10px;font-size:14px}
.footer-col ul li a{color:rgba(255,255,255,.68)}
.footer-col ul li a:hover{color:var(--brand)}
.footer-col ul li.mono{font-family:var(--font-mono);font-size:13px;color:rgba(255,255,255,.5)}
.footer-bottom{
  margin-top:48px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s ease,transform .4s ease}
.reveal.is-visible{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}

/* ---------- 响应式 ---------- */
@media(max-width:1024px){
  .nav-links{display:none}
  .nav-toggle{display:inline-flex}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-shot img{height:320px}
  .float-card-a{left:10px;top:16px}
  .float-card-b{left:10px;bottom:16px}
  .tutorial{grid-template-columns:1fr;gap:28px;padding:36px 0}
  .tutorial.is-reverse .tutorial-media{order:0}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .dark-inner{grid-template-columns:1fr;gap:32px}
  .qr-box{margin-left:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:768px){
  .section{padding:72px 0}
  .hero{padding:32px 0 0}
  .hero h1{font-size:30px}
  .hero-sub{font-size:16px}
  .section-head h2,.cta-inner h2{font-size:24px}
  .anchor-bar{top:56px}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .tutorial-media img{height:230px}
  .hero-strip{margin-top:40px}
}
@media(max-width:520px){
  .container{padding:0 18px}
  .section{padding:56px 0}
  .hero h1{font-size:26px;line-height:1.3}
  .header-inner{height:56px;gap:16px}
  .logo{font-size:15px}
  .logo-mark{width:28px;height:28px}
  .btn{height:44px;padding:0 20px;font-size:14px}
  .btn-lg{height:50px;padding:0 24px;font-size:15px}
  .hero-actions .btn{width:100%}
  .search-field{width:100%}
  .search-bar .container{justify-content:stretch}
  .float-card{padding:10px 12px}
  .spec-row{flex-direction:column;align-items:flex-start;gap:6px}
  .spec-row .value{text-align:left}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
}

/* roulang page: category4 */
:root{
  --ice:#0FA6B8;
  --ice-deep:#0A7C8C;
  --ice-light:#E3F3F6;
  --flame:#FF5A36;
  --flame-deep:#E8431F;
  --magenta:#E6317A;
  --ink:#0C1620;
  --bg:#F3F8FB;
  --bg-alt:#E7F2F6;
  --text:#0E1F29;
  --muted:#566C7A;
  --faint:#8AA0AD;
  --line:#D7E4EB;
  --ok:#12A150;
  --warn:#E8A200;
  --white:#fff;
  --r-card:16px;
  --r-img:12px;
  --r-pill:999px;
  --r-btn:10px;
  --sh-1:0 1px 2px rgba(12,22,32,.06),0 12px 32px -12px rgba(12,22,32,.18);
  --sh-2:0 2px 6px rgba(12,22,32,.08),0 20px 44px -16px rgba(12,22,32,.26);
  --sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
  --s1:8px; --s2:16px; --s3:24px; --s4:32px; --s5:48px; --s6:64px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;object-fit:cover}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul{padding:0;list-style:none}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--ice);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1440px){.container{max-width:1280px}}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:70;background:var(--bg);border-bottom:1px solid transparent;transition:background .25s,box-shadow .25s,border-color .25s}
.site-header.is-scrolled{background:#fff;border-bottom-color:var(--line);box-shadow:0 8px 24px -16px rgba(12,22,32,.4)}
.header-inner{display:flex;align-items:center;gap:20px;height:64px;position:relative}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:800;letter-spacing:.01em;color:var(--text);white-space:nowrap}
.logo-mark{width:32px;height:32px;flex:0 0 32px;border-radius:9px;background:linear-gradient(135deg,var(--ice),var(--ice-deep));display:grid;place-items:center}
.logo-mark svg{width:18px;height:18px}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:6px}
.nav-links a{position:relative;padding:8px 12px;border-radius:8px;font-size:15px;font-weight:600;color:var(--muted);transition:color .2s,background .2s}
.nav-links a:hover{color:var(--ice-deep);background:var(--ice-light)}
.nav-links a.is-active{color:var(--text)}
.nav-links a.is-active::after{content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;border-radius:2px;background:var(--ice)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.icon-btn{width:40px;height:40px;display:grid;place-items:center;border:1px solid var(--line);background:#fff;border-radius:var(--r-btn);color:var(--muted);cursor:pointer;transition:border-color .2s,color .2s,background .2s}
.icon-btn:hover{color:var(--ice-deep);border-color:var(--ice);background:var(--ice-light)}
.icon-btn svg{width:18px;height:18px}
.search-panel{position:absolute;right:0;top:56px;width:300px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--sh-1);padding:12px;display:none}
.search-panel.is-open{display:block}
.search-panel input{width:100%;height:44px;border:1px solid var(--line);border-radius:var(--r-btn);padding:0 14px;font-size:15px;color:var(--text);outline:none;transition:.2s}
.search-panel input:focus{border-color:var(--ice);box-shadow:0 0 0 3px rgba(15,166,184,.15)}
.menu-toggle{display:none}

/* drawer */
.drawer-backdrop{position:fixed;inset:0;background:rgba(12,22,32,.45);opacity:0;visibility:hidden;transition:.3s;z-index:80}
.drawer-backdrop.is-open{opacity:1;visibility:visible}
.drawer{position:fixed;top:0;right:0;width:84%;max-width:340px;height:100%;background:#fff;z-index:90;padding:20px;transform:translateX(100%);transition:transform .3s ease;overflow-y:auto;box-shadow:-12px 0 40px -20px rgba(12,22,32,.5)}
.drawer.is-open{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-title{font-size:14px;font-weight:700;color:var(--faint);letter-spacing:.08em}
.drawer nav{display:flex;flex-direction:column;gap:4px}
.drawer nav a{padding:12px 14px;border-radius:10px;font-weight:600;color:var(--text);background:var(--bg)}
.drawer nav a.is-active{background:var(--ice-light);color:var(--ice-deep)}
.drawer .btn{width:100%;margin-top:18px}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 24px;border-radius:var(--r-pill);font-size:15px;font-weight:700;border:1.5px solid transparent;cursor:pointer;transition:transform .2s,background .2s,box-shadow .2s,color .2s,border-color .2s}
.btn svg{width:18px;height:18px}
.btn-primary{background:var(--flame);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--flame-deep);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(1px);box-shadow:var(--sh-1)}
.btn-outline{border-color:var(--ice);color:var(--ice-deep);background:transparent}
.btn-outline:hover{background:rgba(15,166,184,.08);transform:translateY(-1px)}
.btn-outline:active{transform:translateY(1px)}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{background:var(--ice-light);transform:translateY(-1px)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-lg{height:54px;padding:0 32px;font-size:17px}
.link-more{color:var(--ice-deep);font-weight:700;border-bottom:1.5px solid rgba(15,166,184,.4);border-bottom-offset:2px;padding-bottom:2px;transition:.2s}
.link-more:hover{color:var(--flame);border-bottom-color:var(--flame)}

/* ---------- badges ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:var(--r-pill);font-size:12px;font-weight:700;letter-spacing:.02em;line-height:1.6}
.badge-ice{background:var(--ice-light);color:var(--ice-deep)}
.badge-magenta{background:rgba(230,49,122,.12);color:#B31F5C}
.badge-dark{background:var(--ink);color:#fff}
.badge-cut{clip-path:polygon(6px 0,100% 0,100% calc(100% - 6px),calc(100% - 6px) 100%,0 100%,0 6px)}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:56px 0 0;background:var(--bg)}
.hero-grid{display:grid;grid-template-columns:55fr 45fr;gap:48px;align-items:center;padding-bottom:64px}
.hero-copy{max-width:620px}
.badge-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px}
.hero h1{font-size:44px;line-height:1.16;font-weight:800;letter-spacing:-.01em}
.hero h1 em{font-style:normal;color:var(--ice-deep)}
.hero-sub{margin-top:18px;font-size:17px;color:var(--muted);max-width:520px}
.q-search{margin-top:28px;display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);border-radius:var(--r-pill);padding:7px 7px 7px 20px;max-width:560px;box-shadow:var(--sh-1)}
.q-search svg{width:20px;height:20px;flex:0 0 20px;color:var(--faint)}
.q-search input{flex:1;min-width:0;height:44px;border:0;outline:none;background:transparent;font-size:16px;color:var(--text)}
.q-search input::placeholder{color:var(--faint)}
.q-search .btn{flex:0 0 auto}
.hero-meta{margin-top:20px;display:flex;flex-wrap:wrap;gap:10px 26px;font-size:13px;color:var(--muted)}
.hero-meta b{color:var(--text);font-weight:700}
.hero-visual{position:relative}
.hero-visual .shot{width:100%;height:400px;border-radius:var(--r-card);clip-path:polygon(0 5%,100% 0,100% 95%,0 100%);box-shadow:var(--sh-2)}
.hero-visual::after{content:"";position:absolute;inset:0;border-radius:var(--r-card);background:linear-gradient(160deg,rgba(15,166,184,.22),rgba(15,166,184,0) 62%);clip-path:polygon(0 5%,100% 0,100% 95%,0 100%);pointer-events:none}
.float-card{position:absolute;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--sh-1);padding:12px 16px;z-index:2}
.float-card .k{font-size:12px;color:var(--faint);font-weight:600}
.float-card .v{font-size:18px;font-weight:800;color:var(--ice-deep)}
.fc-a{left:-14px;top:34px}
.fc-b{right:-8px;bottom:44px}
@media (max-width:1180px){.fc-a{left:6px}.fc-b{right:6px}}
.hero-strip{height:24px;background:linear-gradient(180deg,rgba(15,166,184,.22),rgba(15,166,184,0))}

/* ---------- sections ---------- */
.section{padding:96px 0}
.section-alt{background:var(--bg-alt)}
.section-head{max-width:720px;margin-bottom:44px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--ice-deep);letter-spacing:.1em;text-transform:uppercase;margin-bottom:14px}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--ice);border-radius:2px}
h2.title{font-size:30px;line-height:1.3;font-weight:800;letter-spacing:-.005em}
.section-head p{margin-top:14px;color:var(--muted);font-size:16px}

/* quick jump */
.jump-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.jump-card{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:22px;transition:transform .25s,box-shadow .25s}
.jump-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.jump-card .num{font-family:var(--mono);font-size:13px;font-weight:700;color:var(--ice)}
.jump-card h3{margin-top:10px;font-size:17px;font-weight:700}
.jump-card p{margin-top:8px;font-size:14px;color:var(--muted);line-height:1.7}

/* anchor bar */
.anchor-bar{display:flex;gap:8px;overflow-x:auto;padding:4px 0 10px;margin-bottom:28px;-webkit-overflow-scrolling:touch}
.anchor-bar a{flex:0 0 auto;padding:9px 16px;border-radius:var(--r-pill);border:1px solid var(--line);background:#fff;font-size:14px;font-weight:600;color:var(--muted);transition:.2s}
.anchor-bar a:hover{border-color:var(--ice);color:var(--ice-deep);background:var(--ice-light)}

/* faq */
.faq-group{padding:28px 0 8px;border-top:1px solid var(--line)}
.faq-group:first-of-type{border-top:0;padding-top:0}
.group-head{display:flex;align-items:baseline;gap:12px;margin-bottom:18px}
.group-head h3{font-size:20px;font-weight:800}
.group-head span{font-size:13px;color:var(--faint);font-family:var(--mono)}
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;transition:box-shadow .25s,border-color .25s}
.faq-item:hover{border-color:#C3D7E0}
.faq-item.is-open{box-shadow:var(--sh-1);border-color:#C3D7E0}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:19px 22px;background:none;border:0;text-align:left;font-size:16.5px;font-weight:700;color:var(--text);cursor:pointer;line-height:1.6}
.faq-q .ico{width:26px;height:26px;flex:0 0 26px;border-radius:50%;background:var(--ice-light);color:var(--ice-deep);display:grid;place-items:center;font-size:17px;font-weight:700;transition:transform .3s,background .3s,color .3s}
.faq-item.is-open .ico{transform:rotate(180deg);background:var(--ice);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a-inner{padding:0 22px 22px;color:var(--muted);font-size:15.5px;line-height:1.9}
.faq-a-inner b{color:var(--text)}
.faq-a-inner .mono{background:var(--bg-alt);border-radius:6px;padding:2px 6px;font-size:14px}

/* help card */
.help-card{margin-top:56px;background:var(--ink);color:#fff;border-radius:var(--r-card);padding:44px;display:grid;grid-template-columns:1fr 1.1fr;gap:40px;align-items:center;position:relative;overflow:hidden}
.help-card::after{content:"";position:absolute;right:-60px;top:-60px;width:260px;height:260px;background:radial-gradient(circle,rgba(15,166,184,.35),transparent 65%)}
.help-card h3{font-size:24px;font-weight:800;line-height:1.35}
.help-card p{margin-top:14px;color:#A9BECB;font-size:15px}
.help-list{display:grid;gap:14px;position:relative;z-index:1}
.help-row{display:flex;gap:14px;align-items:flex-start;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:12px;padding:16px 18px}
.help-row .ic{width:34px;height:34px;flex:0 0 34px;border-radius:10px;background:var(--ice);display:grid;place-items:center}
.help-row .ic svg{width:18px;height:18px}
.help-row strong{display:block;font-size:15px;font-weight:700}
.help-row span{font-size:13.5px;color:#A9BECB}

/* related */
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rcard{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;transition:transform .25s,box-shadow .25s;display:flex;flex-direction:column}
.rcard:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.rcard .thumb{aspect-ratio:16/10;width:100%}
.rcard .body{padding:20px 22px 24px}
.rcard h3{margin-top:12px;font-size:18px;font-weight:700;line-height:1.45}
.rcard p{margin-top:10px;font-size:14.5px;color:var(--muted);line-height:1.75}
.rcard .go{margin-top:16px;display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;color:var(--ice-deep)}

/* CTA */
.cta{position:relative;overflow:hidden;background:var(--ice-light);border-top:1px solid #CFE7EC;border-bottom:1px solid #CFE7EC}
.cta::before{content:"";position:absolute;inset:0;background-image:repeating-linear-gradient(115deg,rgba(15,166,184,.09) 0 1px,transparent 1px 22px);opacity:.9}
.cta-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:40px;padding:64px 0}
.cta h2{font-size:28px;font-weight:800;line-height:1.35}
.cta p{margin-top:12px;color:var(--muted);max-width:620px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* footer */
.site-footer{background:var(--ink);color:#B9CBD6;padding:72px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer-brand .logo{color:#fff}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.85;color:#93A9B7;max-width:340px}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;letter-spacing:.04em;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a,.footer-col li{font-size:14px;color:#93A9B7;transition:color .2s}
.footer-col a:hover{color:var(--ice)}
.footer-bottom{margin-top:52px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:#7E93A1}

/* responsive */
@media (max-width:1024px){
  .section{padding:72px 0}
  .hero h1{font-size:36px}
  .hero-visual .shot{height:340px}
  .jump-grid{grid-template-columns:repeat(2,1fr)}
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .help-card{grid-template-columns:1fr;padding:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:900px){
  .nav-links{display:none}
  .menu-toggle{display:grid}
  .header-inner{gap:12px}
}
@media (max-width:768px){
  .section{padding:56px 0}
  .hero{padding-top:24px}
  .hero-grid{grid-template-columns:1fr;gap:32px;padding-bottom:48px}
  .hero h1{font-size:28px;line-height:1.3}
  .hero-sub{font-size:16px}
  .hero-visual .shot{height:260px;clip-path:none;border-radius:var(--r-card)}
  .hero-visual::after{clip-path:none}
  h2.title{font-size:24px}
  .q-search{flex-wrap:wrap;border-radius:18px;padding:14px}
  .q-search input{width:100%;flex:1 1 100%;padding:0 4px}
  .q-search .btn{width:100%}
  .cta-inner{flex-direction:column;align-items:flex-start;padding:48px 0}
  .related-grid{grid-template-columns:1fr}
  .help-card{padding:28px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column}
  .float-card{padding:10px 12px}
  .float-card .v{font-size:16px}
}
@media (max-width:520px){
  .container{padding:0 18px}
  .jump-grid{grid-template-columns:1fr}
  .faq-q{font-size:15.5px;padding:17px 16px}
  .faq-a-inner{padding:0 16px 20px;font-size:15px}
  .hero-meta{font-size:12.5px;gap:8px 18px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
}