/* roulang page: index */
:root{
  --ink:#1A1D1B;
  --ink-2:#5A6360;
  --ink-3:#8A928E;
  --green:#12463A;
  --green-deep:#0C3128;
  --green-soft:#E8F0EC;
  --lime:#D6F25E;
  --lime-deep:#C3E043;
  --orange:#E8792B;
  --paper:#F7F5F1;
  --white:#FFFFFF;
  --line:#E6E2DA;
  --line-2:#D9D4C9;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-img:14px;
  --shadow-1:0 2px 8px rgba(18,70,58,.06);
  --shadow-2:0 12px 28px rgba(18,70,58,.12);
  --maxw:1200px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font);
  font-size:17px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;}
a:hover{color:var(--green);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none;}
input,textarea,select{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
dl,dd,dt{margin:0;}
:focus-visible{outline:2px solid var(--green);outline-offset:3px;border-radius:6px;}
::selection{background:var(--lime);color:var(--green-deep);}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}

/* ============ 容器与板块 ============ */
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section--tight{padding:72px 0;}
.section--paper{background:var(--paper);}
.section--white{background:var(--white);}
.section-head{max-width:760px;margin-bottom:48px;}
.section-head h2{
  font-size:clamp(26px,3.2vw,40px);
  line-height:1.22;
  font-weight:800;
  letter-spacing:-.02em;
  padding-top:18px;
  position:relative;
}
.section-head h2::before{
  content:"";
  position:absolute;
  top:0;left:0;
  width:24px;height:4px;border-radius:2px;
  background:var(--green);
}
.section-head p{
  margin-top:14px;
  color:var(--ink-2);
  font-size:16px;
  line-height:1.85;
}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center;}
.section-head--center h2::before{left:50%;transform:translateX(-50%);}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:13px 22px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:700;
  letter-spacing:.01em;
  line-height:1.2;
  border:1px solid transparent;
  transition:transform .22s var(--ease),background-color .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
  white-space:nowrap;
  text-decoration:none;
}
.btn:hover{text-decoration:none;transform:translateY(-2px);}
.btn:active{transform:translateY(0);}
.btn--primary{background:var(--lime);color:var(--green-deep);box-shadow:0 4px 14px rgba(214,242,94,.36);}
.btn--primary:hover{background:var(--lime-deep);color:var(--green-deep);box-shadow:0 10px 24px rgba(214,242,94,.44);}
.btn--dark{background:var(--green);color:#fff;}
.btn--dark:hover{background:var(--green-deep);color:#fff;box-shadow:var(--shadow-2);}
.btn--ghost{background:transparent;color:var(--green);border-color:var(--line-2);}
.btn--ghost:hover{border-color:var(--green);background:rgba(18,70,58,.04);color:var(--green);}
.btn--onDark{background:transparent;color:#fff;border-color:rgba(255,255,255,.35);}
.btn--onDark:hover{border-color:var(--lime);color:var(--lime);background:rgba(255,255,255,.06);}
.btn--sm{padding:10px 16px;font-size:14px;border-radius:9px;}
.btn--lg{padding:16px 30px;font-size:16px;}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none;}
.btn__icon{width:18px;height:18px;flex:0 0 auto;}

/* ============ 顶部导航 ============ */
.site-header{position:relative;z-index:60;}
.brand-bar{background:var(--green);color:#fff;}
.brand-bar .container{
  display:flex;align-items:center;justify-content:space-between;
  gap:20px;min-height:72px;
}
.brand{display:flex;align-items:center;gap:12px;color:#fff;flex:0 1 auto;min-width:0;}
.brand:hover{color:#fff;text-decoration:none;}
.brand__mark{
  width:40px;height:40px;flex:0 0 auto;border-radius:12px;
  background:var(--lime);color:var(--green-deep);
  display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:17px;letter-spacing:-.02em;
}
.brand__text{
  font-size:16.5px;font-weight:700;letter-spacing:-.01em;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.brand__sub{
  display:block;font-size:11.5px;font-weight:400;color:rgba(255,255,255,.6);
  letter-spacing:.08em;line-height:1.4;
}
.brand-actions{display:flex;align-items:center;gap:14px;flex:0 0 auto;}
.search-box{position:relative;display:flex;align-items:center;}
.search-box input{
  width:210px;height:44px;border-radius:var(--radius-btn);
  border:1px solid rgba(255,255,255,.22);
  background:rgba(255,255,255,.08);
  color:#fff;padding:0 42px 0 14px;font-size:14px;
  transition:border-color .2s var(--ease),background-color .2s var(--ease),width .25s var(--ease);
}
.search-box input::placeholder{color:rgba(255,255,255,.5);}
.search-box input:focus{outline:none;border-color:var(--lime);background:rgba(255,255,255,.14);}
.search-box button{
  position:absolute;right:6px;width:32px;height:32px;border-radius:8px;
  display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.72);
  transition:background-color .2s var(--ease),color .2s var(--ease);
}
.search-box button:hover{background:rgba(255,255,255,.14);color:#fff;}
.locale{font-size:13px;color:rgba(255,255,255,.66);white-space:nowrap;}
.menu-toggle{
  display:none;width:44px;height:44px;border-radius:10px;
  border:1px solid rgba(255,255,255,.25);color:#fff;
  align-items:center;justify-content:center;
}
.menu-toggle:hover{background:rgba(255,255,255,.12);}

.channel-bar{
  background:var(--paper);
  border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:55;
}
.channel-bar .container{display:flex;align-items:center;gap:6px;overflow-x:auto;scrollbar-width:none;}
.channel-bar .container::-webkit-scrollbar{display:none;}
.channel{
  position:relative;display:inline-flex;align-items:center;
  padding:16px 16px 14px;font-size:15px;font-weight:600;color:var(--ink-2);
  white-space:nowrap;transition:color .2s var(--ease);
  border-bottom:2px solid transparent;
}
.channel:hover{color:var(--green);text-decoration:none;}
.channel.is-active{color:var(--green);border-bottom-color:var(--green);}
.channel__dot{width:5px;height:5px;border-radius:50%;background:var(--orange);margin-left:8px;display:none;}
.channel.is-new .channel__dot{display:inline-block;}

/* 移动端抽屉 */
.mobile-drawer{
  position:fixed;inset:0 0 0 auto;width:min(86vw,340px);
  background:var(--white);z-index:90;
  transform:translateX(102%);transition:transform .3s var(--ease);
  padding:24px 22px;overflow-y:auto;
  box-shadow:-18px 0 40px rgba(18,70,58,.16);
}
.mobile-drawer.is-open{transform:translateX(0);}
.drawer-mask{
  position:fixed;inset:0;background:rgba(12,49,40,.42);
  opacity:0;pointer-events:none;transition:opacity .3s var(--ease);z-index:85;
}
.drawer-mask.is-open{opacity:1;pointer-events:auto;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.drawer-head strong{font-size:15px;color:var(--green);}
.drawer-close{width:36px;height:36px;border-radius:9px;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;}
.drawer-nav a{
  display:block;padding:14px 12px;border-radius:10px;font-size:15.5px;font-weight:600;color:var(--ink);
  border-bottom:1px solid var(--line);
}
.drawer-nav a.is-active{color:var(--green);background:var(--green-soft);}
.drawer-nav a:hover{text-decoration:none;background:var(--green-soft);}
.drawer-cta{margin-top:22px;display:grid;gap:10px;}
.drawer-note{margin-top:18px;font-size:13px;color:var(--ink-3);line-height:1.7;}

/* ============ Hero ============ */
.hero{
  position:relative;
  padding:80px 0 72px;
  background:
    radial-gradient(900px 420px at 88% -10%, rgba(214,242,94,.30), transparent 62%),
    linear-gradient(180deg,#FBF9F5 0%, var(--paper) 100%);
  overflow:hidden;
}
.hero__grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;}
.hero__eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;border-radius:999px;
  background:rgba(18,70,58,.07);color:var(--green);
  font-size:13px;font-weight:700;letter-spacing:.02em;margin-bottom:22px;
}
.hero__eyebrow span.dot{width:7px;height:7px;border-radius:50%;background:var(--orange);}
.hero h1{
  font-size:clamp(32px,4.6vw,56px);
  line-height:1.1;
  font-weight:800;
  letter-spacing:-.022em;
  color:var(--ink);
}
.hero h1 em{font-style:normal;color:var(--green);box-shadow:inset 0 -12px 0 rgba(214,242,94,.55);}
.hero__lead{
  margin-top:22px;
  font-size:18px;
  line-height:1.8;
  color:var(--ink-2);
  max-width:560px;
}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px;}
.hero__facts{
  display:flex;flex-wrap:wrap;align-items:center;gap:0;
  margin-top:34px;font-size:13.5px;color:var(--ink-2);
}
.hero__facts li{
  padding:0 18px;position:relative;
}
.hero__facts li:first-child{padding-left:0;}
.hero__facts li+li::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:1px;height:14px;background:var(--line-2);
}
.hero__facts b{color:var(--ink);font-weight:700;}

.hero__visual{position:relative;}
.hero__visual::before{
  content:"";position:absolute;inset:-18px -26px 38px 34px;
  border-radius:26px;
  background-image:url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;
  opacity:.92;
}
.phone-frame{
  position:relative;
  width:min(268px,72%);
  margin:0 auto;
  border-radius:30px;
  padding:10px;
  background:linear-gradient(160deg,#1B2421,#0E1714);
  box-shadow:0 26px 60px rgba(18,70,58,.28);
  animation:floatUp .9s var(--ease) both;
}
.phone-frame__screen{
  border-radius:22px;overflow:hidden;background:#0C3128;
  aspect-ratio:9/19.5;
}
.phone-frame__screen img{width:100%;height:100%;object-fit:cover;}
.hero__badge{
  position:absolute;right:2px;bottom:56px;
  background:var(--white);border:1px solid var(--line);
  border-radius:14px;padding:12px 16px;box-shadow:var(--shadow-2);
  display:flex;align-items:center;gap:10px;
}
.hero__badge b{font-size:19px;color:var(--green);font-variant-numeric:tabular-nums;}
.hero__badge span{font-size:12.5px;color:var(--ink-2);line-height:1.4;}
.pulse-star{width:26px;height:26px;flex:0 0 auto;color:var(--orange);}

@keyframes floatUp{
  from{opacity:0;transform:translateY(18px);}
  to{opacity:1;transform:translateY(0);}
}
.hero__text > *{animation:floatUp .7s var(--ease) both;}
.hero__text > *:nth-child(1){animation-delay:.02s;}
.hero__text > *:nth-child(2){animation-delay:.11s;}
.hero__text > *:nth-child(3){animation-delay:.20s;}
.hero__text > *:nth-child(4){animation-delay:.29s;}
.hero__text > *:nth-child(5){animation-delay:.38s;}

/* ============ 信任条 ============ */
.trust-bar{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--white);}
.trust-bar .container{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:0;
}
.trust-item{
  padding:22px 20px;border-left:1px solid var(--line);
  display:flex;flex-direction:column;gap:4px;
}
.trust-item:first-child{border-left:0;padding-left:0;}
.trust-item b{font-size:20px;font-weight:800;color:var(--green);font-variant-numeric:tabular-nums;letter-spacing:-.01em;}
.trust-item span{font-size:13px;color:var(--ink-3);}

/* ============ 功能价值区 ============ */
.feature-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;}
.feature-card{
  grid-column:span 12;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:34px 32px 32px;
  box-shadow:var(--shadow-1);
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
  position:relative;overflow:hidden;
}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#D8E2DD;}
.feature-card--a{grid-column:span 7;}
.feature-card--b{grid-column:span 5;}
.feature-card--c{grid-column:span 5;}
.feature-card--d{grid-column:span 7;}
.feature-card__index{
  font-size:54px;font-weight:800;line-height:1;letter-spacing:-.04em;
  color:rgba(18,70,58,.10);font-variant-numeric:tabular-nums;display:block;
}
.feature-card__icon{
  width:44px;height:44px;border-radius:12px;background:var(--green-soft);
  display:flex;align-items:center;justify-content:center;color:var(--green);
  margin:-26px 0 18px;
}
.feature-card h3{font-size:21px;font-weight:800;letter-spacing:-.01em;margin-bottom:10px;}
.feature-card p{color:var(--ink-2);font-size:15.5px;line-height:1.85;}
.feature-card__tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;}
.tag{
  display:inline-flex;align-items:center;padding:5px 11px;border-radius:999px;
  font-size:12.5px;font-weight:600;background:var(--paper);color:var(--ink-2);
  border:1px solid var(--line);
}
.tag--green{background:var(--green-soft);color:var(--green);border-color:transparent;}
.tag--lime{background:var(--lime);color:var(--green-deep);border-color:transparent;}
.tag--orange{background:rgba(232,121,43,.12);color:#B8560E;border-color:transparent;}

/* ============ 截图轮播 ============ */
.shots{background:var(--white);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.shots__bar{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:34px;}
.shots__nav{display:flex;align-items:center;gap:12px;}
.round-btn{
  width:44px;height:44px;border-radius:50%;border:1px solid var(--line-2);
  display:flex;align-items:center;justify-content:center;color:var(--green);
  background:var(--white);transition:all .22s var(--ease);
}
.round-btn:hover{border-color:var(--green);background:var(--green);color:#fff;}
.round-btn:disabled{opacity:.4;pointer-events:none;}
.counter{font-size:14px;color:var(--ink-2);font-variant-numeric:tabular-nums;min-width:54px;text-align:center;}
.track{
  display:flex;gap:22px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:6px 2px 26px;scrollbar-width:none;
}
.track::-webkit-scrollbar{display:none;}
.slide{
  scroll-snap-align:start;flex:0 0 auto;width:262px;
}
.slide__frame{
  border-radius:var(--radius-img);overflow:hidden;background:#EDEAE3;
  aspect-ratio:9/19.5;border:1px solid var(--line);
  transition:transform .32s var(--ease),box-shadow .32s var(--ease);
}
.slide:hover .slide__frame{transform:scale(1.03);box-shadow:var(--shadow-2);}
.slide__frame img{width:100%;height:100%;object-fit:cover;}
.slide__caption{margin-top:14px;font-size:14px;font-weight:700;}
.slide__caption span{display:block;font-weight:400;font-size:13px;color:var(--ink-3);margin-top:3px;}
.dots{display:flex;justify-content:center;gap:8px;margin-top:6px;}
.dots button{
  width:8px;height:8px;border-radius:50%;background:var(--line-2);
  transition:all .22s var(--ease);
}
.dots button.is-active{background:var(--green);width:26px;border-radius:4px;}

/* ============ 系统要求 ============ */
.req-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.req-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:32px 30px;box-shadow:var(--shadow-1);
}
.req-card--rec{border-color:rgba(18,70,58,.28);}
.req-card__head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:22px;}
.req-card__head h3{font-size:20px;font-weight:800;}
.req-list{display:block;}
.req-row{
  display:flex;align-items:baseline;justify-content:space-between;gap:18px;
  padding:14px 0;border-top:1px solid var(--line);
}
.req-row:first-child{border-top:0;padding-top:0;}
.req-row dt{font-size:14.5px;color:var(--ink-2);flex:0 0 auto;}
.req-row dd{font-size:15px;font-weight:700;text-align:right;color:var(--ink);font-variant-numeric:tabular-nums;}
.req-note{margin-top:20px;font-size:13px;color:var(--ink-3);line-height:1.8;}

/* ============ 评价墙 ============ */
.reviews{background:var(--white);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.review-cols{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.review-col{display:flex;flex-direction:column;gap:24px;}
.review-col--offset{padding-top:40px;}
.review-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px 24px;box-shadow:var(--shadow-1);
  transition:transform .28s var(--ease),box-shadow .28s var(--ease);
}
.review-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.review-card__top{display:flex;align-items:center;gap:12px;margin-bottom:14px;}
.avatar{
  width:42px;height:42px;border-radius:50%;flex:0 0 auto;
  background:linear-gradient(140deg,var(--green),#3C7A66);
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;
}
.avatar--b{background:linear-gradient(140deg,#E8792B,#C65C15);}
.avatar--c{background:linear-gradient(140deg,#4B5F58,#7C8D86);}
.avatar--d{background:linear-gradient(140deg,#12463A,#D6F25E);color:var(--green-deep);}
.review-card__top strong{display:block;font-size:15px;font-weight:700;}
.review-card__top em{font-style:normal;font-size:12.5px;color:var(--ink-3);}
.stars{display:flex;gap:3px;margin-left:auto;}
.stars svg{width:15px;height:15px;color:var(--orange);}
.review-card p{font-size:15px;color:var(--ink-2);line-height:1.85;}
.review-card__from{
  display:inline-block;margin-top:14px;font-size:12.5px;color:var(--ink-3);
  padding:4px 10px;border-radius:999px;background:var(--paper);border:1px solid var(--line);
}

/* ============ 下载区 ============ */
.download{
  background:var(--green);
  color:#fff;
  border-radius:0;
  position:relative;
  overflow:hidden;
}
.download::after{
  content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(214,242,94,.28),transparent 68%);
  pointer-events:none;
}
.download__grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;position:relative;z-index:2;}
.download h2{
  font-size:clamp(26px,3.2vw,40px);font-weight:800;line-height:1.2;letter-spacing:-.02em;color:#fff;
}
.download p.lead{margin-top:16px;color:rgba(255,255,255,.78);font-size:16px;line-height:1.85;max-width:520px;}
.download__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.download__meta{
  margin-top:24px;font-size:13px;color:rgba(255,255,255,.62);
  display:flex;flex-wrap:wrap;gap:10px 20px;
}
.download__meta span{display:inline-flex;align-items:center;gap:6px;}
.qr-panel{
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.18);
  border-radius:20px;padding:26px;text-align:center;
}
.qr-box{
  width:168px;height:168px;margin:0 auto;border-radius:14px;background:#fff;
  display:flex;align-items:center;justify-content:center;
  color:var(--green);font-size:13px;font-weight:700;padding:12px;text-align:center;line-height:1.6;
}
.qr-panel p{margin-top:16px;font-size:13.5px;color:rgba(255,255,255,.72);}
.qr-panel strong{display:block;font-size:15px;color:#fff;margin-bottom:8px;}

/* ============ 最新信息 ============ */
.post-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;}
.post-head .more{
  font-size:14.5px;font-weight:700;color:var(--green);
  display:inline-flex;align-items:center;gap:6px;
}
.post-head .more:hover{text-decoration:none;color:var(--green-deep);}
.post-head .more span{transition:transform .22s var(--ease);}
.post-head .more:hover span{transform:translateX(4px);}
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.post-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
  display:flex;flex-direction:column;
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#D8E2DD;}
.post-card__link{display:flex;flex-direction:column;height:100%;padding:24px 22px;color:inherit;}
.post-card__link:hover{text-decoration:none;color:inherit;}
.post-card__cat{
  align-self:flex-start;font-size:12px;font-weight:700;letter-spacing:.02em;
  color:var(--green);background:var(--green-soft);
  padding:4px 10px;border-radius:999px;margin-bottom:14px;
}
.post-card h3{
  font-size:17.5px;font-weight:800;line-height:1.5;letter-spacing:-.01em;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .22s var(--ease);
}
.post-card:hover h3{color:var(--green);}
.post-card__excerpt{
  margin-top:10px;font-size:14.5px;color:var(--ink-2);line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-card__meta{
  margin-top:18px;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--ink-3);font-variant-numeric:tabular-nums;
}
.post-card__arrow{transition:transform .22s var(--ease);color:var(--green);font-weight:700;}
.post-card:hover .post-card__arrow{transform:translateX(4px);}

.empty-state{
  border:1px dashed var(--line-2);border-radius:var(--radius-card);
  background:var(--white);text-align:center;padding:64px 24px;
}
.empty-state strong{display:block;font-size:17px;margin-bottom:8px;}
.empty-state p{color:var(--ink-2);font-size:14.5px;margin-bottom:20px;}

/* ============ FAQ ============ */
.faq-list{max-width:900px;}
.faq-item{
  background:var(--white);border:1px solid var(--line);
  border-radius:14px;margin-bottom:14px;overflow:hidden;
  transition:box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.faq-item[open]{border-color:rgba(18,70,58,.26);box-shadow:var(--shadow-1);}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;gap:16px;justify-content:space-between;
  padding:20px 22px;font-size:16.5px;font-weight:700;line-height:1.6;
  transition:color .2s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--green);}
.faq-item .plus{
  width:26px;height:26px;flex:0 0 auto;border-radius:8px;
  background:var(--green-soft);color:var(--green);
  display:flex;align-items:center;justify-content:center;
  font-size:16px;font-weight:700;line-height:1;
  transition:transform .24s var(--ease),background-color .24s var(--ease);
}
.faq-item[open] .plus{background:var(--green);color:#fff;transform:rotate(45deg);}
.faq-item .answer{
  padding:0 22px 22px 22px;
  color:var(--ink-2);font-size:15.5px;line-height:1.9;
  border-top:1px solid var(--line);margin-top:-1px;padding-top:18px;
}
.faq-item .answer ul{margin-top:10px;}
.faq-item .answer li{position:relative;padding-left:16px;margin-top:6px;}
.faq-item .answer li::before{
  content:"";position:absolute;left:0;top:12px;width:6px;height:6px;border-radius:50%;background:var(--orange);
}

/* ============ 页脚 ============ */
.site-footer{background:var(--green);color:rgba(255,255,255,.78);padding:64px 0 28px;margin-top:0;}
.footer-brand{
  display:flex;align-items:center;gap:12px;padding-bottom:28px;margin-bottom:36px;
  border-bottom:1px solid rgba(255,255,255,.14);
}
.footer-brand .brand__mark{background:var(--lime);color:var(--green-deep);}
.footer-brand strong{color:#fff;font-size:16px;font-weight:700;}
.footer-brand p{font-size:12.5px;color:rgba(255,255,255,.55);margin-top:4px;}
.footer-cols{display:grid;grid-template-columns:1.1fr 1fr 1fr 1.2fr;gap:32px;}
.footer-col h4{font-size:14px;color:#fff;font-weight:700;margin-bottom:16px;letter-spacing:.03em;}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72);}
.footer-col a:hover{color:var(--lime);text-decoration:none;}
.footer-col p{font-size:13.5px;line-height:1.9;color:rgba(255,255,255,.68);}
.footer-qr{
  margin-top:14px;width:104px;height:104px;border-radius:12px;background:#fff;
  display:flex;align-items:center;justify-content:center;color:var(--green);
  font-size:12px;font-weight:700;text-align:center;padding:8px;line-height:1.5;
}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.14);
  display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.55);
}
.footer-bottom nav{display:flex;flex-wrap:wrap;gap:18px;}
.footer-bottom a{color:rgba(255,255,255,.6);}
.footer-bottom a:hover{color:var(--lime);text-decoration:none;}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .container{padding:0 24px;}
  .hero__grid{gap:44px;}
  .brand__text{font-size:15.5px;}
}
@media (max-width:1023px){
  .section{padding:72px 0;}
  .section--tight{padding:56px 0;}
  .hero{padding:60px 0 56px;}
  .hero__grid{grid-template-columns:1fr;gap:48px;}
  .hero__visual{max-width:420px;margin:0 auto;}
  .hero__visual::before{inset:-14px -10px 40px 24px;}
  .feature-card--a,.feature-card--b,.feature-card--c,.feature-card--d{grid-column:span 12;}
  .download__grid{grid-template-columns:1fr;gap:40px;}
  .post-grid{grid-template-columns:repeat(2,1fr);}
  .footer-cols{grid-template-columns:1fr 1fr;gap:28px;}
  .search-box input{width:170px;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .container{padding:0 18px;}
  .section{padding:56px 0;}
  .section--tight{padding:48px 0;}
  .section-head{margin-bottom:34px;}
  .brand__sub{display:none;}
  .brand__text{font-size:14.5px;max-width:56vw;}
  .search-box,.locale,.brand-actions .btn{display:none;}
  .menu-toggle{display:flex;}
  .trust-bar .container{grid-template-columns:1fr 1fr;}
  .trust-item{border-left:0;padding:18px 0;border-bottom:1px solid var(--line);}
  .trust-item:nth-child(odd){padding-right:16px;}
  .trust-item:nth-child(even){border-left:1px solid var(--line);padding-left:18px;}
  .trust-item:nth-last-child(-n+2){border-bottom:0;}
  .req-grid{grid-template-columns:1fr;}
  .review-cols{grid-template-columns:1fr;}
  .review-col--offset{padding-top:0;}
  .shots__nav{display:none;}
  .slide{width:220px;}
  .post-grid{grid-template-columns:1fr;}
  .hero__facts{gap:8px 0;}
  .hero__facts li{padding:0 12px;font-size:12.5px;}
  .hero__badge{right:-4px;bottom:30px;padding:10px 13px;}
  .footer-cols{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .download__actions .btn{width:100%;}
}
@media (max-width:479px){
  .hero h1{font-size:28px;}
  .hero__lead{font-size:16px;}
  .feature-card{padding:26px 20px 24px;}
  .feature-card__index{font-size:44px;}
  .post-card__link{padding:20px 18px;}
  .brand__mark{width:36px;height:36px;font-size:15px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important;}
}

/* roulang page: article */
:root{
  --green:#12463A;
  --green-deep:#0C3329;
  --green-soft:#1B5A4B;
  --lime:#D6F25E;
  --orange:#E8792B;
  --paper:#F7F5F1;
  --card:#FFFFFF;
  --text:#1A1D1B;
  --muted:#5A6360;
  --line:#E6E2DA;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-img:14px;
  --shadow-1:0 2px 8px rgba(18,70,58,.06);
  --shadow-2:0 12px 28px rgba(18,70,58,.12);
  --container:1200px;
  --ease:cubic-bezier(.2,.7,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;text-underline-offset:3px}
a:hover{color:var(--green)}
button,input{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--green);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--card);
  border-bottom:1px solid var(--line);
}
.brand-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-height:72px;
  padding-top:12px;
  padding-bottom:12px;
}
.brand{display:flex;align-items:center;gap:12px}
.brand__mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:40px;height:40px;
  flex:0 0 40px;
  border-radius:12px;
  background:var(--green);
  color:var(--lime);
  font-weight:800;
  font-size:17px;
  letter-spacing:-.02em;
}
.brand__text{font-size:17px;font-weight:800;letter-spacing:-.01em;line-height:1.2}
.brand__sub{display:block;font-size:12px;font-weight:500;color:var(--muted);letter-spacing:0}
.brand-actions{display:flex;align-items:center;gap:14px}
.site-note{font-size:13px;color:var(--muted);white-space:nowrap}
.search-box{position:relative;display:flex;align-items:center}
.search-box input{
  width:190px;height:44px;
  padding:0 14px;
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  background:var(--paper);
  font-size:14px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.search-box input::placeholder{color:#9AA2A0}
.search-box input:focus{outline:none;border-color:var(--green);box-shadow:0 0 0 3px rgba(18,70,58,.12)}
.menu-toggle{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--line);
  background:var(--card);
  border-radius:var(--radius-btn);
  cursor:pointer;
}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--green);margin:3px auto}

/* ---------- channel bar ---------- */
.channel-bar{
  position:sticky;
  top:72px;
  z-index:55;
  background:var(--card);
  border-bottom:1px solid var(--line);
}
.channel-bar .container{
  display:flex;
  align-items:center;
  gap:26px;
  overflow-x:auto;
  scrollbar-width:none;
  min-height:52px;
}
.channel-bar .container::-webkit-scrollbar{display:none}
.channel{
  position:relative;
  flex:0 0 auto;
  padding:15px 2px;
  font-size:15px;
  font-weight:600;
  color:var(--muted);
  white-space:nowrap;
  transition:color .2s var(--ease);
}
.channel::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:3px;
  border-radius:3px 3px 0 0;
  background:var(--green);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .24s var(--ease);
}
.channel:hover{color:var(--green)}
.channel:hover::after{transform:scaleX(1)}
.channel.is-active{color:var(--green)}
.channel.is-active::after{transform:scaleX(1)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:9px;
  padding:13px 22px;
  border:1px solid transparent;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:700;
  cursor:pointer;
  transition:transform .2s var(--ease),background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.btn:active{transform:translateY(0)}
.btn--primary{background:var(--lime);color:#12261F;box-shadow:var(--shadow-1)}
.btn--primary:hover{background:#C9E94D;color:#12261F;transform:translateY(-2px);box-shadow:var(--shadow-2)}
.btn--dark{background:var(--green);color:#fff}
.btn--dark:hover{background:var(--green-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-2)}
.btn--ghost{background:transparent;border-color:var(--green);color:var(--green)}
.btn--ghost:hover{background:rgba(18,70,58,.06);color:var(--green);transform:translateY(-2px)}
.btn--sm{padding:10px 16px;font-size:14px}

/* ---------- labels ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:5px 12px;
  border-radius:999px;
  background:rgba(18,70,58,.08);
  color:var(--green);
  font-size:13px;
  font-weight:700;
}
.tag{
  display:inline-block;
  padding:4px 11px;
  border-radius:999px;
  background:var(--paper);
  border:1px solid var(--line);
  font-size:12.5px;
  color:var(--muted);
  font-weight:600;
}
.section-line{width:24px;height:3px;background:var(--green);border-radius:2px}

/* ---------- article layout ---------- */
.page-main{padding:36px 0 0}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:9px;
  font-size:13.5px;
  color:var(--muted);
  margin-bottom:26px;
}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--green)}
.breadcrumb .sep{color:#BFC6C3}

.article-head{
  max-width:820px;
  padding-bottom:30px;
  border-bottom:1px solid var(--line);
}
.article-head h1{
  margin:16px 0 18px;
  font-size:clamp(28px,4vw,46px);
  line-height:1.18;
  font-weight:800;
  letter-spacing:-.02em;
}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 18px;
  font-size:13.5px;
  color:var(--muted);
}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:#C6CDC9}
.article-lead{
  margin-top:20px;
  padding:16px 20px;
  border-left:3px solid var(--lime);
  background:var(--card);
  border-radius:0 var(--radius-img) var(--radius-img) 0;
  font-size:15.5px;
  color:var(--muted);
}

.article-shell{
  display:grid;
  grid-template-columns:minmax(0,1fr) 300px;
  gap:52px;
  align-items:start;
  padding:44px 0 0;
}
.article-panel{max-width:760px}

.prose{font-size:17.5px;line-height:1.9;color:var(--text)}
.prose p{margin:0 0 1.2em}
.prose h2{
  position:relative;
  margin:2.1em 0 .8em;
  padding-top:16px;
  font-size:clamp(21px,2.4vw,27px);
  line-height:1.4;
  font-weight:800;
  letter-spacing:-.01em;
}
.prose h2::before{
  content:"";
  position:absolute;
  top:0;left:0;
  width:26px;height:3px;
  border-radius:2px;
  background:var(--orange);
}
.prose h3{margin:1.7em 0 .6em;font-size:19.5px;font-weight:800}
.prose ul,.prose ol{margin:0 0 1.3em;padding-left:2px}
.prose ul li,.prose ol li{position:relative;padding-left:22px;margin-bottom:.55em}
.prose ul li::before{
  content:"";
  position:absolute;
  left:2px;top:.75em;
  width:7px;height:7px;
  border-radius:50%;
  background:var(--green);
}
.prose ol{counter-reset:proseol}
.prose ol li{counter-increment:proseol}
.prose ol li::before{
  content:counter(proseol);
  position:absolute;
  left:0;top:.1em;
  font-size:14px;
  font-weight:800;
  color:var(--orange);
}
.prose blockquote{
  margin:1.6em 0;
  padding:18px 22px;
  background:var(--card);
  border-left:3px solid var(--green);
  border-radius:0 var(--radius-img) var(--radius-img) 0;
  color:var(--muted);
  font-size:16.5px;
}
.prose blockquote p:last-child{margin-bottom:0}
.prose img{margin:1.6em 0;border-radius:var(--radius-img);width:100%;height:auto}
.prose code{
  padding:2px 7px;
  border-radius:6px;
  background:rgba(18,70,58,.08);
  font-size:14.5px;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
.prose pre{
  margin:1.6em 0;
  padding:18px 20px;
  background:var(--green);
  color:#EAF2ED;
  border-radius:var(--radius-img);
  overflow-x:auto;
  font-size:14.5px;
  line-height:1.7;
}
.prose pre code{background:none;padding:0;color:inherit}
.prose a{color:var(--green);text-decoration:underline;text-decoration-thickness:1px}
.prose table{width:100%;border-collapse:collapse;margin:1.5em 0;font-size:15px}
.prose th,.prose td{padding:11px 14px;border-bottom:1px solid var(--line);text-align:left}
.prose th{background:rgba(18,70,58,.05);font-weight:700}

.empty-state{
  padding:56px 28px;
  text-align:center;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
}
.empty-state h2{font-size:22px;font-weight:800;margin-bottom:12px}
.empty-state p{color:var(--muted);margin-bottom:22px}

/* ---------- sidebar ---------- */
.article-side{position:sticky;top:148px;display:grid;gap:20px}
.side-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:22px;
  box-shadow:var(--shadow-1);
}
.side-card h3{font-size:15px;font-weight:800;margin-bottom:14px;display:flex;align-items:center;gap:9px}
.side-list li{padding:11px 0;border-bottom:1px dashed var(--line);font-size:14px;color:var(--muted)}
.side-list li:last-child{border-bottom:0;padding-bottom:0}
.side-list a{color:var(--text);font-weight:600}
.side-list a:hover{color:var(--green)}
.side-meta{display:flex;gap:14px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.side-meta strong{display:block;font-size:19px;color:var(--green);font-weight:800}
.side-qr{
  margin-top:14px;
  height:120px;
  border-radius:var(--radius-img);
  background:
    repeating-linear-gradient(45deg,#EFF1EA 0 8px,#E3E7DC 8px 16px);
  display:flex;align-items:center;justify-content:center;
  color:var(--muted);font-size:13px;text-align:center;
}

/* ---------- download band ---------- */
.download-band{
  margin:56px 0 0;
  background:var(--green);
  color:#EAF2ED;
  border-radius:22px;
  padding:40px;
  display:grid;
  grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);
  gap:36px;
  align-items:center;
}
.download-band h2{font-size:clamp(22px,2.6vw,30px);font-weight:800;color:#fff;letter-spacing:-.01em;line-height:1.3}
.download-band p{margin-top:12px;color:#BFD4CB;font-size:15px;max-width:46ch}
.download-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:24px}
.download-hint{margin-top:18px;font-size:13px;color:#A9C6BA}
.download-aside{
  border:1px solid rgba(214,242,94,.35);
  border-radius:var(--radius-card);
  padding:22px;
  background:rgba(255,255,255,.05);
}
.download-aside dt{font-size:12.5px;color:#A9C6BA;margin-top:12px}
.download-aside dt:first-child{margin-top:0}
.download-aside dd{margin:2px 0 0;font-size:16px;font-weight:700;color:#fff}

/* ---------- related ---------- */
.related{margin-top:64px}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
  margin-bottom:28px;
}
.section-head h2{font-size:clamp(21px,2.4vw,28px);font-weight:800;letter-spacing:-.01em;margin-top:12px}
.section-head p{color:var(--muted);font-size:14.5px;margin-top:8px}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  display:flex;
  flex-direction:column;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:transform .28s var(--ease),box-shadow .28s var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.card__thumb{position:relative;aspect-ratio:4/3;overflow:hidden;background:#E9EBE4}
.card__thumb img{width:100%;height:100%;object-fit:cover;transition:transform .32s var(--ease)}
.card:hover .card__thumb img{transform:scale(1.03)}
.card__body{padding:20px;display:flex;flex-direction:column;gap:11px;flex:1}
.card__body h3{font-size:17px;font-weight:800;line-height:1.45}
.card:hover .card__body h3{color:var(--green)}
.card__body p{font-size:14px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card__foot{
  margin-top:auto;
  padding-top:14px;
  border-top:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-size:13px;
  color:var(--muted);
}
.card__arrow{transition:transform .24s var(--ease);font-weight:700;color:var(--green)}
.card:hover .card__arrow{transform:translateX(4px)}

.back-row{margin:44px 0 0}
.back-link{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-size:15px;
  font-weight:700;
  color:var(--green);
}
.back-link:hover{color:var(--orange)}

/* ---------- footer ---------- */
.site-footer{
  margin-top:88px;
  background:var(--green);
  color:#CFE0D8;
  padding:60px 0 28px;
}
.footer-brand{display:flex;align-items:center;gap:14px;padding-bottom:30px;border-bottom:1px solid rgba(255,255,255,.14)}
.footer-brand strong{display:block;color:#fff;font-size:17px;font-weight:800;letter-spacing:-.01em}
.footer-brand p{margin-top:6px;font-size:13.5px;color:#A9C6BA}
.footer-cols{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:32px;
  padding:36px 0;
}
.footer-col h4{color:#fff;font-size:15px;font-weight:800;margin-bottom:16px}
.footer-col ul li{margin-bottom:11px}
.footer-col ul a{font-size:14px;color:#BFD4CB}
.footer-col ul a:hover{color:var(--lime)}
.footer-col p{font-size:13.5px;line-height:1.8;color:#A9C6BA}
.footer-qr{
  margin-top:16px;
  width:112px;height:112px;
  border-radius:12px;
  border:1px solid rgba(255,255,255,.2);
  display:flex;align-items:center;justify-content:center;
  text-align:center;
  font-size:12px;
  color:#CFE0D8;
  background:repeating-linear-gradient(45deg,rgba(255,255,255,.06) 0 8px,rgba(255,255,255,.12) 8px 16px);
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.14);
  padding-top:22px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  flex-wrap:wrap;
  font-size:13px;
  color:#9FBDB1;
}
.footer-bottom nav{display:flex;gap:20px;flex-wrap:wrap}
.footer-bottom a{color:#9FBDB1}
.footer-bottom a:hover{color:var(--lime)}

/* ---------- drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;
  background:rgba(12,51,41,.5);
  opacity:0;visibility:hidden;
  transition:opacity .24s var(--ease),visibility .24s var(--ease);
  z-index:80;
}
.drawer{
  position:fixed;
  top:0;right:0;
  width:min(320px,86vw);
  height:100%;
  background:var(--card);
  z-index:90;
  padding:26px 22px;
  transform:translateX(100%);
  transition:transform .28s var(--ease);
  overflow-y:auto;
}
body.drawer-open .drawer{transform:translateX(0)}
body.drawer-open .drawer-mask{opacity:1;visibility:visible}
.drawer h3{font-size:14px;color:var(--muted);font-weight:700;margin-bottom:14px}
.drawer a.drawer-link{
  display:block;
  padding:14px 4px;
  font-size:16px;
  font-weight:700;
  border-bottom:1px solid var(--line);
}
.drawer .btn{width:100%;margin-top:22px}
.drawer-close{
  position:absolute;top:18px;right:18px;
  width:38px;height:38px;
  border:1px solid var(--line);
  border-radius:10px;
  background:var(--card);
  cursor:pointer;
  font-size:18px;
  line-height:1;
  color:var(--green);
}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .article-shell{grid-template-columns:minmax(0,1fr) 270px;gap:40px}
}
@media (max-width:1023px){
  .article-shell{grid-template-columns:minmax(0,1fr);gap:36px}
  .article-side{position:static;grid-template-columns:repeat(2,minmax(0,1fr))}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr))}
  .download-band{grid-template-columns:minmax(0,1fr);padding:32px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .site-note,.search-box{display:none}
  .menu-toggle{display:block}
  .brand__text{font-size:15.5px}
  .brand__sub{font-size:11.5px}
  .brand-row{min-height:66px}
  .channel-bar{top:66px}
  .channel-bar .container{gap:20px}
  .channel{font-size:14px;padding:14px 2px}
  .page-main{padding-top:26px}
  .article-head h1{font-size:26px}
  .article-shell{padding-top:30px}
  .prose{font-size:16.5px}
  .article-side{grid-template-columns:minmax(0,1fr)}
  .download-band{margin-top:40px;padding:26px 22px;border-radius:18px}
  .download-actions .btn{width:100%}
  .related-grid{grid-template-columns:minmax(0,1fr)}
  .site-footer{padding:48px 0 24px;margin-top:64px}
  .footer-cols{grid-template-columns:minmax(0,1fr);gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:479px){
  .article-meta{font-size:12.5px;gap:8px 12px}
  .prose{font-size:16px;line-height:1.85}
  .btn{padding:12px 18px;font-size:14.5px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* roulang page: category1 */
:root{
  --ink:#12463A;
  --ink-deep:#0E3A30;
  --lime:#D6F25E;
  --lime-dark:#C4E244;
  --orange:#E8792B;
  --paper:#F7F5F1;
  --card:#FFFFFF;
  --text:#1A1D1B;
  --muted:#5A6360;
  --line:#E6E2DA;
  --placeholder:#E9E5DD;
  --r-card:16px;
  --r-btn:10px;
  --r-img:14px;
  --sh-1:0 2px 8px rgba(18,70,58,.06);
  --sh-2:0 12px 28px rgba(18,70,58,.12);
  --font-cn:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  --font-num:"SF Pro Display",-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16.5px;
  line-height:1.8;
  letter-spacing:.002em;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px;text-decoration-color:rgba(18,70,58,.28);transition:color .2s ease,text-decoration-color .2s ease;}
a:hover{color:var(--ink);text-decoration-color:var(--ink);}
button,input{font:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px;border-radius:4px;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;}

/* ---------- header ---------- */
.site-header{position:relative;z-index:60;}
.brand-row{background:var(--paper);border-bottom:1px solid var(--line);}
.brand-row__inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:76px;padding-top:10px;padding-bottom:10px;}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);}
.brand__mark{
  width:42px;height:42px;flex:0 0 auto;border-radius:12px;background:var(--ink);color:var(--lime);
  display:flex;align-items:center;justify-content:center;font-family:var(--font-num);font-weight:800;font-size:19px;letter-spacing:-.02em;
}
.brand__text{font-weight:800;font-size:19px;letter-spacing:-.01em;line-height:1.2;}
.brand-row__tools{display:flex;align-items:center;gap:12px;}
.search-form{display:flex;align-items:center;gap:8px;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:4px 4px 4px 14px;}
.search-input{width:196px;height:36px;border:0;background:transparent;font-size:14px;}
.search-input::placeholder{color:#9AA3A0;}
.search-input:focus{outline:none;}
.search-form:focus-within{border-color:var(--ink);box-shadow:0 0 0 2px rgba(18,70,58,.14);}
.lang-chip{font-size:13px;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:6px 12px;white-space:nowrap;}
.menu-toggle{display:none;align-items:center;gap:7px;height:44px;padding:0 16px;border-radius:var(--r-btn);border:1px solid var(--ink);background:transparent;color:var(--ink);font-size:14px;font-weight:600;cursor:pointer;}
.menu-toggle__bars{display:inline-flex;flex-direction:column;gap:3px;}
.menu-toggle__bars i{display:block;width:16px;height:2px;background:var(--ink);border-radius:2px;}

.channel-bar{position:sticky;top:0;z-index:55;background:var(--paper);border-bottom:1px solid var(--line);}
.channel-bar .container{display:flex;align-items:center;gap:6px;overflow-x:auto;scrollbar-width:none;}
.channel-bar .container::-webkit-scrollbar{display:none;}
.channel{
  position:relative;display:inline-block;flex:0 0 auto;padding:16px 14px 15px;font-size:15px;font-weight:600;
  color:var(--muted);text-decoration:none;border-bottom:2px solid transparent;transition:color .2s ease,border-color .2s ease;
}
.channel:hover{color:var(--ink);}
.channel.is-active{color:var(--ink);border-bottom-color:var(--ink);}
.channel.is-active::after{
  content:"";position:absolute;left:50%;bottom:-1px;width:6px;height:6px;border-radius:50%;background:var(--lime);
  transform:translate(-50%,50%);
}

/* mobile drawer */
.drawer-mask{position:fixed;inset:0;background:rgba(18,70,58,.42);opacity:0;visibility:hidden;transition:opacity .28s ease,visibility .28s ease;z-index:70;}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);background:var(--card);z-index:80;
  transform:translateX(102%);transition:transform .3s cubic-bezier(.2,.7,.2,1);
  padding:22px 20px;display:flex;flex-direction:column;gap:18px;box-shadow:-12px 0 32px rgba(18,70,58,.16);
  overflow-y:auto;
}
.mobile-drawer__head{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.mobile-drawer__head strong{font-size:16px;color:var(--ink);}
.drawer-close{width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:var(--card);cursor:pointer;font-size:18px;line-height:1;color:var(--ink);}
.mobile-drawer nav{display:flex;flex-direction:column;gap:6px;}
.mobile-drawer nav a{padding:13px 14px;border-radius:12px;font-weight:600;text-decoration:none;color:var(--text);border:1px solid transparent;}
.mobile-drawer nav a:hover{background:var(--paper);border-color:var(--line);}
.mobile-drawer nav a.is-active{background:rgba(18,70,58,.07);color:var(--ink);border-color:rgba(18,70,58,.12);}
.mobile-drawer__note{font-size:13.5px;color:var(--muted);border-top:1px solid var(--line);padding-top:14px;}
body.drawer-open .drawer-mask{opacity:1;visibility:visible;}
body.drawer-open .mobile-drawer{transform:translateX(0);}

/* ---------- buttons / badges ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:46px;padding:0 22px;
  border-radius:var(--r-btn);border:1px solid transparent;font-size:15px;font-weight:700;cursor:pointer;
  text-decoration:none;white-space:nowrap;transition:transform .2s ease,background-color .2s ease,box-shadow .2s ease,color .2s ease,border-color .2s ease;
}
.btn--primary{background:var(--lime);color:var(--text);}
.btn--primary:hover{background:var(--lime-dark);color:var(--text);transform:translateY(-2px);box-shadow:var(--sh-2);}
.btn--solid{background:var(--ink);color:#fff;}
.btn--solid:hover{background:var(--ink-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-2);}
.btn--ghost{border-color:var(--ink);color:var(--ink);background:transparent;}
.btn--ghost:hover{background:rgba(18,70,58,.06);transform:translateY(-2px);color:var(--ink);}
.btn--on-dark{border-color:rgba(255,255,255,.42);color:#fff;background:transparent;}
.btn--on-dark:hover{background:rgba(255,255,255,.12);color:#fff;transform:translateY(-2px);}
.btn--lg{min-height:54px;padding:0 28px;font-size:16.5px;}
.btn--sm{min-height:38px;padding:0 15px;font-size:13.5px;border-radius:9px;}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none;}
.badge{display:inline-flex;align-items:center;gap:7px;border-radius:999px;padding:6px 13px;font-size:13px;font-weight:700;line-height:1.4;}
.badge--lime{background:var(--lime);color:var(--text);}
.badge--outline{border:1px solid var(--line);background:var(--card);color:var(--muted);font-weight:600;}
.badge--ink{background:rgba(18,70,58,.1);color:var(--ink);}
.badge--orange{background:rgba(232,121,43,.13);color:#B4560F;}
.tag{display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.02em;color:var(--ink);background:rgba(18,70,58,.08);border-radius:999px;padding:4px 11px;text-decoration:none;}

/* ---------- hero ---------- */
.hero{padding:72px 0 64px;border-bottom:1px solid var(--line);}
.hero__grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;}
.hero__eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:13.5px;font-weight:700;letter-spacing:.06em;color:var(--ink);text-transform:uppercase;}
.hero__eyebrow::before{content:"";width:24px;height:2px;background:var(--orange);display:block;}
.hero__title{font-size:clamp(34px,4.6vw,60px);font-weight:800;letter-spacing:-.02em;line-height:1.08;margin:18px 0 18px;}
.hero__lead{font-size:17px;color:var(--muted);max-width:46em;}
.hero__actions{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0 22px;}
.hero__facts{display:flex;flex-wrap:wrap;gap:0 18px;font-size:14px;color:var(--muted);}
.hero__facts li{position:relative;padding-right:18px;}
.hero__facts li:not(:last-child)::after{content:"";position:absolute;right:0;top:50%;transform:translateY(-50%);width:1px;height:14px;background:var(--line);}
.anchor-tabs{display:flex;gap:8px;overflow-x:auto;margin-top:26px;padding-bottom:4px;scrollbar-width:none;}
.anchor-tabs::-webkit-scrollbar{display:none;}
.anchor-tabs a{
  flex:0 0 auto;padding:8px 15px;border:1px solid var(--line);border-radius:999px;background:var(--card);
  font-size:13.5px;font-weight:600;color:var(--muted);text-decoration:none;transition:all .2s ease;
}
.anchor-tabs a:hover{border-color:var(--ink);color:var(--ink);}

.hero__media{position:relative;}
.hero__media .badge{position:absolute;left:16px;bottom:16px;box-shadow:var(--sh-1);}

/* ---------- image ratio ---------- */
.ratio{position:relative;overflow:hidden;border-radius:var(--r-img);background:var(--placeholder);}
.ratio>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .32s cubic-bezier(.2,.7,.2,1);}
.ratio--16x9{aspect-ratio:16/9;}
.ratio--4x3{aspect-ratio:4/3;}
.ratio--3x2{aspect-ratio:3/2;}
.ratio--phone{aspect-ratio:9/19.5;max-width:250px;margin:0 auto;}
.ratio:hover>img{transform:scale(1.03);}

/* ---------- sections ---------- */
.section{padding:88px 0;}
.section--tight{padding:64px 0;}
.section--paper{background:var(--paper);}
.section--white{background:var(--card);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section__head{max-width:760px;margin-bottom:40px;}
.section__title{font-size:clamp(25px,3vw,38px);font-weight:800;letter-spacing:-.015em;line-height:1.2;padding-top:14px;position:relative;}
.section__title::before{content:"";position:absolute;top:0;left:0;width:24px;height:3px;background:var(--ink);border-radius:2px;}
.section__note{margin-top:14px;color:var(--muted);font-size:16px;}

/* ---------- split blocks ---------- */
.split{display:grid;grid-template-columns:5fr 7fr;gap:52px;align-items:center;}
.split + .split{margin-top:72px;}
.split--reverse{grid-template-columns:7fr 5fr;}
.split--reverse .split__media{order:2;}
.split__body h3{font-size:clamp(20px,2.2vw,26px);font-weight:800;letter-spacing:-.01em;line-height:1.3;margin-bottom:14px;}
.split__body p{color:var(--muted);}
.split__body p + p{margin-top:12px;}
.mini-list{margin-top:20px;display:grid;gap:11px;}
.mini-list li{position:relative;padding-left:26px;font-size:15.5px;}
.mini-list li::before{
  content:"";position:absolute;left:0;top:.62em;width:9px;height:9px;border-radius:3px;background:var(--lime);border:1px solid var(--ink);
}
.stat-strip{display:flex;flex-wrap:wrap;gap:28px;margin-top:26px;}
.stat-strip div strong{display:block;font-family:var(--font-num);font-size:26px;font-weight:800;color:var(--ink);font-variant-numeric:tabular-nums;}
.stat-strip div span{font-size:13.5px;color:var(--muted);}

/* ---------- screenshot rail ---------- */
.rail{display:flex;gap:22px;overflow-x:auto;scroll-snap-type:x mandatory;padding:6px 2px 22px;scrollbar-width:thin;}
.rail::-webkit-scrollbar{height:6px;}
.rail::-webkit-scrollbar-thumb{background:var(--line);border-radius:6px;}
.rail__item{flex:0 0 clamp(240px,30%,330px);scroll-snap-align:start;}
.rail__item figcaption{margin-top:14px;font-size:14.5px;color:var(--muted);}
.rail__item h4{font-size:16.5px;font-weight:700;margin-bottom:6px;color:var(--text);}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;}
.step{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:28px 24px;box-shadow:var(--sh-1);transition:transform .28s ease,box-shadow .28s ease;}
.step:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.step__num{font-family:var(--font-num);font-size:34px;font-weight:800;color:var(--orange);letter-spacing:-.03em;line-height:1;}
.step h3{font-size:18px;font-weight:800;margin:16px 0 10px;}
.step p{font-size:15px;color:var(--muted);}

/* ---------- spec compare ---------- */
.spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px;}
.spec-col{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:26px 24px;box-shadow:var(--sh-1);}
.spec-col--accent{border-color:rgba(18,70,58,.34);box-shadow:var(--sh-2);}
.spec-col h3{font-size:19px;font-weight:800;display:flex;align-items:center;justify-content:space-between;gap:12px;}
.spec-rows{margin-top:18px;}
.spec-rows div{display:flex;justify-content:space-between;gap:16px;padding:12px 0;border-top:1px solid var(--line);font-size:15px;}
.spec-rows div:first-child{border-top:0;}
.spec-rows dt{color:var(--muted);}
.spec-rows dd{font-weight:700;text-align:right;}
.checklist{margin-top:34px;background:var(--card);border:1px solid var(--line);border-left:4px solid var(--lime);border-radius:var(--r-card);padding:26px 26px 22px;}
.checklist h3{font-size:18px;font-weight:800;margin-bottom:14px;}
.checklist ul{display:grid;gap:11px;}
.checklist li{position:relative;padding-left:28px;font-size:15.5px;color:var(--muted);}
.checklist li::before{
  content:"";position:absolute;left:2px;top:.55em;width:12px;height:7px;border-left:2px solid var(--ink);border-bottom:2px solid var(--ink);
  transform:rotate(-45deg);
}

/* ---------- timeline + reviews ---------- */
.dual{display:grid;grid-template-columns:6fr 6fr;gap:44px;align-items:start;}
.timeline{border-left:2px solid var(--line);padding-left:24px;display:grid;gap:26px;}
.timeline li{position:relative;}
.timeline li::before{content:"";position:absolute;left:-31px;top:8px;width:12px;height:12px;border-radius:50%;background:var(--card);border:2px solid var(--ink);}
.timeline strong{display:block;font-family:var(--font-num);font-size:15px;color:var(--ink);font-variant-numeric:tabular-nums;}
.timeline span{display:block;font-size:14.5px;color:var(--muted);margin-top:4px;}
.review-list{display:grid;gap:14px;}
.review{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:20px 20px 18px;box-shadow:var(--sh-1);}
.review__top{display:flex;align-items:center;gap:12px;}
.avatar{width:38px;height:38px;border-radius:50%;background:var(--placeholder);display:flex;align-items:center;justify-content:center;font-weight:800;color:var(--ink);font-size:15px;flex:0 0 auto;}
.review__name{font-weight:700;font-size:15px;}
.review__meta{font-size:12.5px;color:var(--muted);}
.stars{display:flex;gap:3px;margin-left:auto;}
.stars svg{width:15px;height:15px;fill:var(--orange);}
.review p{font-size:15px;color:var(--muted);margin-top:12px;}

/* ---------- faq ---------- */
.faq{display:grid;gap:12px;max-width:900px;}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;transition:border-color .24s ease,box-shadow .24s ease;}
.faq details[open]{border-color:rgba(18,70,58,.3);box-shadow:var(--sh-1);}
.faq summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 22px;font-weight:700;font-size:16.5px;transition:color .2s ease;
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary:hover{color:var(--ink);}
.faq summary .faq__icon{flex:0 0 auto;width:26px;height:26px;border-radius:50%;background:rgba(18,70,58,.08);color:var(--ink);position:relative;}
.faq summary .faq__icon::before,.faq summary .faq__icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--ink);transform:translate(-50%,-50%);border-radius:2px;
}
.faq summary .faq__icon::before{width:11px;height:2px;}
.faq summary .faq__icon::after{width:2px;height:11px;transition:opacity .24s ease,transform .24s ease;}
.faq details[open] summary .faq__icon::after{opacity:0;transform:translate(-50%,-50%) rotate(90deg);}
.faq__body{padding:0 22px 22px 22px;color:var(--muted);font-size:15.5px;}
.faq__body p + p{margin-top:10px;}

/* ---------- CTA ---------- */
.cta{background:var(--ink);color:#fff;border-radius:20px;padding:48px 44px;position:relative;overflow:hidden;}
.cta::after{
  content:"";position:absolute;right:-90px;top:-90px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle at center,rgba(214,242,94,.28),rgba(214,242,94,0) 68%);
}
.cta__grid{display:grid;grid-template-columns:7fr 5fr;gap:40px;align-items:center;position:relative;z-index:2;}
.cta h2{font-size:clamp(24px,3vw,34px);font-weight:800;letter-spacing:-.015em;line-height:1.25;}
.cta p{color:rgba(255,255,255,.76);margin-top:14px;font-size:15.5px;max-width:44em;}
.cta__actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.cta__note{font-size:13.5px;color:rgba(255,255,255,.66);margin-top:16px;}
.qr-panel{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);border-radius:var(--r-card);padding:22px;text-align:center;}
.qr-box{width:150px;height:150px;margin:0 auto;border-radius:12px;background:var(--card);display:flex;align-items:center;justify-content:center;color:var(--ink);font-size:13px;font-weight:700;text-align:center;line-height:1.5;padding:12px;}
.qr-panel p{font-size:13.5px;color:rgba(255,255,255,.72);margin-top:14px;}
.qr-modal{position:fixed;inset:0;display:none;align-items:center;justify-content:center;z-index:95;background:rgba(18,70,58,.5);padding:24px;}
.qr-modal.is-open{display:flex;}
.qr-modal__card{background:var(--card);border-radius:20px;padding:30px;width:min(380px,100%);text-align:center;box-shadow:var(--sh-2);}
.qr-modal__card h3{font-size:19px;font-weight:800;color:var(--ink);}
.qr-modal__card .qr-box{border:1px solid var(--line);margin:20px auto 16px;}
.qr-modal__card p{font-size:14px;color:var(--muted);}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.82);margin-top:88px;padding:64px 0 28px;}
.site-footer a{color:rgba(255,255,255,.82);text-decoration-color:rgba(255,255,255,.3);}
.site-footer a:hover{color:#fff;text-decoration-color:var(--lime);}
.footer-brand{display:flex;align-items:center;gap:14px;padding-bottom:28px;border-bottom:1px solid rgba(255,255,255,.14);}
.footer-brand .brand__mark{background:var(--lime);color:var(--ink);}
.footer-brand strong{display:block;color:#fff;font-size:18px;font-weight:800;letter-spacing:-.01em;}
.footer-brand p{font-size:14px;color:rgba(255,255,255,.66);margin-top:4px;}
.footer-cols{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;padding:36px 0 32px;border-bottom:1px solid rgba(255,255,255,.14);}
.footer-col h4{color:#fff;font-size:15.5px;font-weight:700;margin-bottom:16px;}
.footer-col ul{display:grid;gap:11px;}
.footer-col li a{font-size:14.5px;text-decoration:none;}
.footer-col li a:hover{text-decoration:underline;}
.footer-col p{font-size:14px;color:rgba(255,255,255,.66);line-height:1.75;}
.footer-qr{margin-top:16px;display:inline-flex;align-items:center;justify-content:center;width:104px;height:104px;border-radius:12px;background:rgba(255,255,255,.1);border:1px dashed rgba(255,255,255,.28);font-size:12.5px;text-align:center;line-height:1.5;color:rgba(255,255,255,.72);padding:10px;}
.footer-bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;padding-top:24px;font-size:13.5px;color:rgba(255,255,255,.6);}
.footer-bottom nav{display:flex;flex-wrap:wrap;gap:18px;}
.footer-bottom nav a{font-size:13.5px;text-decoration:none;}

/* ---------- animation ---------- */
.fade-up{opacity:0;transform:translateY(14px);animation:fadeUp .68s cubic-bezier(.2,.7,.2,1) forwards;}
.fade-up:nth-child(1){animation-delay:.02s;}
.fade-up:nth-child(2){animation-delay:.11s;}
.fade-up:nth-child(3){animation-delay:.2s;}
.fade-up:nth-child(4){animation-delay:.29s;}
.fade-up:nth-child(5){animation-delay:.38s;}
@keyframes fadeUp{to{opacity:1;transform:translateY(0);}}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .hero__grid{gap:40px;}
  .split,.split--reverse{gap:38px;}
}
@media (max-width:1023px){
  .search-form{display:none;}
  .hero{padding:56px 0 52px;}
  .hero__grid{grid-template-columns:1fr;gap:34px;}
  .hero__media{max-width:560px;}
  .section{padding:68px 0;}
  .split,.split--reverse{grid-template-columns:1fr;gap:28px;}
  .split--reverse .split__media{order:0;}
  .steps{grid-template-columns:1fr;gap:18px;}
  .spec-grid{grid-template-columns:1fr;}
  .dual{grid-template-columns:1fr;gap:34px;}
  .cta__grid{grid-template-columns:1fr;gap:30px;}
  .footer-cols{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:767px){
  body{font-size:16px;}
  .container{padding:0 18px;}
  .lang-chip{display:none;}
  .menu-toggle{display:inline-flex;}
  .brand__text{font-size:16px;}
  .brand__mark{width:38px;height:38px;font-size:17px;}
  .channel{padding:14px 11px;font-size:14px;}
  .section{padding:52px 0;}
  .section--tight{padding:44px 0;}
  .cta{padding:32px 22px;border-radius:16px;}
  .rail__item{flex:0 0 76%;}
  .review__top{flex-wrap:wrap;}
  .stars{margin-left:0;}
  .footer-cols{grid-template-columns:1fr;gap:26px;}
  .site-footer{padding:48px 0 24px;margin-top:64px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:480px){
  .hero__title{font-size:clamp(28px,8.4vw,36px);}
  .hero__actions .btn{width:100%;}
  .hero__facts{gap:6px 14px;font-size:13px;}
  .ratio--phone{max-width:200px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;}
  .fade-up{opacity:1;transform:none;}
}

/* roulang page: category2 */
:root{
  --brand:#12463A;
  --brand-dark:#0C332A;
  --brand-soft:#1C5A4A;
  --accent:#D6F25E;
  --accent-dark:#C3E24A;
  --orange:#E8792B;
  --bg:#F7F5F1;
  --surface:#FFFFFF;
  --text:#1A1D1B;
  --muted:#5A6360;
  --line:#E6E2DA;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-img:14px;
  --shadow-sm:0 2px 8px rgba(18,70,58,.06);
  --shadow-lg:0 12px 28px rgba(18,70,58,.12);
  --container:1200px;
  --ease:cubic-bezier(.2,.7,.2,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;text-underline-offset:3px;}
a:hover{color:var(--brand);}
button,input{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-.01em;}
p{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}

/* ---------- 顶部品牌行 ---------- */
.site-header{background:var(--surface);border-bottom:1px solid var(--line);position:relative;z-index:70;}
.header-top{display:flex;align-items:center;gap:24px;padding-top:16px;padding-bottom:16px;}
.brand{display:flex;align-items:center;gap:12px;flex:none;}
.brand__mark{
  width:42px;height:42px;border-radius:12px;background:var(--brand);color:var(--accent);
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:18px;
  letter-spacing:-.03em;font-variant-numeric:tabular-nums;
}
.brand__name{font-weight:800;font-size:18px;letter-spacing:-.02em;line-height:1.3;}
.brand__sub{display:block;font-size:12px;color:var(--muted);font-weight:500;letter-spacing:0;}
.header-search{display:flex;align-items:center;gap:8px;flex:1;max-width:420px;margin-left:auto;}
.header-search input{
  width:100%;height:44px;border:1px solid var(--line);border-radius:var(--radius-btn);
  background:var(--bg);padding:0 14px;font-size:14.5px;transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.header-search input::placeholder{color:#9aa3a0;}
.header-search input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(18,70,58,.12);}
.header-actions{display:flex;align-items:center;gap:14px;flex:none;}
.header-meta{font-size:13px;color:var(--muted);white-space:nowrap;}
.nav-toggle{
  display:none;align-items:center;gap:8px;height:44px;padding:0 14px;border:1px solid var(--line);
  background:var(--surface);border-radius:var(--radius-btn);cursor:pointer;font-size:14px;font-weight:600;
  transition:border-color .25s var(--ease),background .25s var(--ease);
}
.nav-toggle:hover{border-color:var(--brand);background:var(--bg);}
.nav-toggle svg{width:16px;height:16px;}

/* ---------- 频道行 ---------- */
.channel-bar{
  position:sticky;top:0;z-index:60;background:var(--brand);
  border-bottom:1px solid rgba(255,255,255,.12);
}
.channel-bar .container{display:flex;gap:6px;overflow-x:auto;scrollbar-width:none;}
.channel-bar .container::-webkit-scrollbar{display:none;}
.channel{
  display:inline-flex;align-items:center;height:52px;padding:0 18px;font-size:15px;font-weight:600;
  color:rgba(255,255,255,.82);white-space:nowrap;border-radius:999px;margin:6px 0;
  transition:background .25s var(--ease),color .25s var(--ease);
}
.channel:hover{background:rgba(255,255,255,.1);color:#fff;}
.channel.is-active{background:var(--accent);color:var(--brand-dark);}
.channel.is-active:hover{background:var(--accent-dark);color:var(--brand-dark);}

/* ---------- 抽屉（移动端） ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(12,51,42,.45);opacity:0;visibility:hidden;
  transition:opacity .3s var(--ease),visibility .3s;z-index:90;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);background:var(--surface);z-index:95;
  transform:translateX(100%);transition:transform .34s var(--ease);padding:24px 22px;overflow-y:auto;
  display:flex;flex-direction:column;gap:8px;
}
.drawer.is-open{transform:translateX(0);}
.drawer h3{font-size:13px;letter-spacing:.08em;color:var(--muted);font-weight:700;margin-bottom:4px;}
.drawer a.drawer-link{
  display:block;padding:13px 14px;border-radius:12px;font-size:15px;font-weight:600;border:1px solid var(--line);
}
.drawer a.drawer-link:hover{background:var(--bg);}
.drawer a.drawer-link.is-active{background:var(--brand);color:#fff;border-color:var(--brand);}
.drawer-close{
  align-self:flex-end;width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:var(--surface);
  cursor:pointer;font-size:18px;line-height:1;display:flex;align-items:center;justify-content:center;
}
.drawer-cta{margin-top:14px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;height:50px;padding:0 24px;
  border-radius:var(--radius-btn);font-size:15.5px;font-weight:700;border:1px solid transparent;cursor:pointer;
  transition:transform .28s var(--ease),background .28s var(--ease),box-shadow .28s var(--ease),color .28s var(--ease);
  text-align:center;
}
.btn svg{width:18px;height:18px;flex:none;}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-sm);}
.btn-primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-lg);}
.btn-accent{background:var(--accent);color:var(--brand-dark);}
.btn-accent:hover{background:var(--accent-dark);color:var(--brand-dark);transform:translateY(-2px);box-shadow:0 12px 26px rgba(0,0,0,.18);}
.btn-ghost{background:transparent;color:var(--brand);border-color:var(--brand);}
.btn-ghost:hover{background:rgba(18,70,58,.06);color:var(--brand-dark);transform:translateY(-2px);}
.btn-light{background:#fff;color:var(--brand);}
.btn-light:hover{background:#EDF3F0;color:var(--brand-dark);transform:translateY(-2px);}
.btn-sm{height:42px;padding:0 18px;font-size:14.5px;}
.btn-lg{height:56px;padding:0 30px;font-size:16.5px;}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.45;pointer-events:none;}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0;}
.section--tight{padding:72px 0;}
.section--paper{background:#F1EEE8;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:44px;}
.section-title{font-size:clamp(26px,3.2vw,40px);font-weight:800;letter-spacing:-.02em;padding-top:16px;position:relative;}
.section-title::before{content:"";position:absolute;top:0;left:0;width:24px;height:4px;border-radius:2px;background:var(--brand);}
.section-note{margin-top:12px;color:var(--muted);font-size:15.5px;max-width:640px;}
.section-link{font-size:14.5px;font-weight:700;color:var(--brand);display:inline-flex;align-items:center;gap:6px;white-space:nowrap;}
.section-link svg{width:16px;height:16px;transition:transform .3s var(--ease);}
.section-link:hover{text-decoration:underline;}
.section-link:hover svg{transform:translateX(4px);}
section[id]{scroll-margin-top:86px;}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding-top:26px;font-size:13.5px;color:var(--muted);}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:8px;list-style:none;}
.breadcrumb li::after{content:"/";margin-left:8px;color:#c4c8c5;}
.breadcrumb li:last-child::after{display:none;}
.breadcrumb a:hover{color:var(--brand);text-decoration:underline;}

/* ---------- 分类头部 ---------- */
.cat-hero{padding:36px 0 76px;}
.cat-hero__grid{display:grid;grid-template-columns:6fr 5fr;gap:56px;align-items:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.04em;
  color:var(--brand);background:rgba(18,70,58,.08);border-radius:999px;padding:7px 14px;margin-bottom:20px;
}
.cat-title{font-size:clamp(32px,4.6vw,58px);font-weight:800;letter-spacing:-.025em;line-height:1.08;}
.cat-title span{color:var(--brand);}
.cat-lead{margin-top:20px;font-size:17px;color:var(--muted);max-width:620px;line-height:1.85;}
.hero-stats{display:flex;flex-wrap:wrap;gap:0;margin-top:28px;}
.hero-stats div{
  padding:0 22px;border-left:1px solid var(--line);font-size:14px;color:var(--muted);line-height:1.6;
}
.hero-stats div:first-child{padding-left:0;border-left:0;}
.hero-stats strong{display:block;font-size:20px;font-weight:800;color:var(--text);font-variant-numeric:tabular-nums;}
.hero-media{
  margin:0;border-radius:var(--radius-img);overflow:hidden;box-shadow:var(--shadow-lg);position:relative;background:#DCDAD4;
}
.hero-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .32s var(--ease);}
.hero-media:hover img{transform:scale(1.03);}
.hero-media figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:34px 20px 14px;color:#fff;font-size:13.5px;
  background:linear-gradient(to top,rgba(12,51,42,.82),rgba(12,51,42,0));
}
.anchor-tabs{display:flex;flex-wrap:nowrap;gap:10px;margin-top:38px;overflow-x:auto;padding-bottom:6px;scrollbar-width:none;}
.anchor-tabs::-webkit-scrollbar{display:none;}
.anchor-tab{
  display:inline-flex;align-items:center;height:40px;padding:0 16px;border-radius:999px;background:var(--surface);
  border:1px solid var(--line);font-size:14px;font-weight:600;color:var(--muted);white-space:nowrap;
  transition:border-color .25s var(--ease),color .25s var(--ease),background .25s var(--ease);
}
.anchor-tab:hover{border-color:var(--brand);color:var(--brand);background:#fff;}

/* ---------- 功能模块清单 ---------- */
.module-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 48px;}
.module-item{padding:28px 0;border-top:1px solid var(--line);display:flex;gap:22px;}
.module-num{
  font-size:34px;font-weight:800;letter-spacing:-.03em;color:var(--orange);
  font-variant-numeric:tabular-nums;line-height:1;flex:none;width:56px;
}
.module-item h3{font-size:19px;font-weight:700;margin-bottom:8px;}
.module-item p{color:var(--muted);font-size:15px;line-height:1.8;}

/* ---------- 使用流程 ---------- */
.flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px;}
.flow-step{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:26px 22px;
  box-shadow:var(--shadow-sm);transition:transform .32s var(--ease),box-shadow .32s var(--ease);
  display:flex;flex-direction:column;
}
.flow-step:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);}
.flow-num{font-size:30px;font-weight:800;color:var(--brand);letter-spacing:-.03em;font-variant-numeric:tabular-nums;line-height:1;}
.flow-step h3{font-size:17.5px;font-weight:700;margin:14px 0 8px;}
.flow-step p{font-size:14.5px;color:var(--muted);line-height:1.8;}
.flow-tag{
  margin-top:16px;align-self:flex-start;font-size:12.5px;font-weight:700;color:var(--brand);
  background:rgba(18,70,58,.08);border-radius:999px;padding:5px 12px;
}

/* ---------- 规格对照 ---------- */
.spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.spec-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:30px 28px;}
.spec-card--accent{border-color:var(--brand);box-shadow:var(--shadow-lg);}
.spec-head{display:flex;align-items:center;justify-content:space-between;gap:14px;padding-bottom:18px;}
.spec-head h3{font-size:20px;font-weight:800;}
.badge{
  display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:700;border-radius:999px;padding:6px 13px;
  background:rgba(18,70,58,.08);color:var(--brand);
}
.badge--accent{background:var(--accent);color:var(--brand-dark);}
.badge--orange{background:rgba(232,121,43,.12);color:#B65A18;}
.spec-list{margin:0;}
.spec-row{display:flex;align-items:baseline;justify-content:space-between;gap:18px;padding:14px 0;border-top:1px solid var(--line);}
.spec-row dt{color:var(--muted);font-size:14.5px;flex:none;}
.spec-row dd{margin:0;font-size:14.5px;font-weight:700;text-align:right;font-variant-numeric:tabular-nums;}

/* ---------- 要点清单 + 配图 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.split-media{margin:0;border-radius:var(--radius-img);overflow:hidden;box-shadow:var(--shadow-sm);background:#DCDAD4;}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .32s var(--ease);}
.split-media:hover img{transform:scale(1.03);}
.checklist{display:grid;gap:14px;margin-top:26px;}
.check-item{
  display:flex;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:16px 18px;
  transition:border-color .28s var(--ease),transform .28s var(--ease),box-shadow .28s var(--ease);
}
.check-item:hover{border-color:var(--brand);transform:translateY(-2px);box-shadow:var(--shadow-sm);}
.tick{
  width:22px;height:22px;border-radius:999px;background:var(--brand);color:var(--accent);flex:none;margin-top:3px;
  display:flex;align-items:center;justify-content:center;
}
.tick svg{width:12px;height:12px;}
.check-item strong{display:block;font-size:15.5px;}
.check-item span.check-desc{display:block;font-size:14px;color:var(--muted);line-height:1.75;}

/* ---------- 场景卡（不对称网格） ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.scene-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
  box-shadow:var(--shadow-sm);display:flex;flex-direction:column;
  transition:transform .32s var(--ease),box-shadow .32s var(--ease);
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);}
.scene-card--wide{grid-column:span 2;flex-direction:row;align-items:stretch;}
.scene-figure{margin:0;background:#DCDAD4;overflow:hidden;}
.scene-figure img{width:100%;height:100%;min-height:200px;object-fit:cover;aspect-ratio:4/3;transition:transform .32s var(--ease);}
.scene-card--wide .scene-figure{flex:0 0 46%;}
.scene-card--wide .scene-figure img{aspect-ratio:auto;height:100%;}
.scene-card:hover .scene-figure img{transform:scale(1.03);}
.scene-body{padding:24px 24px 26px;display:flex;flex-direction:column;gap:10px;}
.scene-body h3{font-size:18px;font-weight:700;}
.scene-body p{font-size:14.5px;color:var(--muted);line-height:1.8;}
.scene-meta{margin-top:auto;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums;}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:12px;max-width:920px;}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:14px;overflow:hidden;
  transition:border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.faq-item[open]{border-color:#CBD6D1;box-shadow:var(--shadow-sm);}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:18px;padding:20px 22px;cursor:pointer;
  font-size:17px;font-weight:700;list-style:none;
}
.faq-q::-webkit-details-marker{display:none;}
.faq-q:hover{color:var(--brand);}
.faq-icon{position:relative;width:18px;height:18px;flex:none;}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;transition:transform .24s var(--ease),opacity .24s var(--ease);
}
.faq-icon::before{left:0;top:8px;width:18px;height:2px;}
.faq-icon::after{left:8px;top:0;width:2px;height:18px;}
.faq-item[open] .faq-icon::after{transform:scaleY(0);opacity:0;}
.faq-a{padding:0 22px 22px 22px;font-size:15.5px;color:var(--muted);line-height:1.9;}

/* ---------- 下载区 ---------- */
.download{
  position:relative;background:var(--brand);border-radius:24px;padding:56px 52px;color:#fff;overflow:hidden;
  box-shadow:0 24px 48px rgba(12,51,42,.18);
}
.download::after{
  content:"";position:absolute;right:-120px;top:-120px;width:380px;height:380px;border-radius:50%;
  background:rgba(214,242,94,.08);
}
.download__grid{position:relative;display:grid;grid-template-columns:1.5fr 1fr;gap:52px;align-items:center;z-index:1;}
.download h2{font-size:clamp(26px,3vw,36px);font-weight:800;letter-spacing:-.02em;}
.download p.lead{margin-top:14px;color:rgba(255,255,255,.78);font-size:15.5px;max-width:560px;line-height:1.85;}
.dl-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.verify-note{
  margin-top:22px;padding-top:18px;border-top:1px solid rgba(255,255,255,.18);
  font-size:13.5px;color:rgba(255,255,255,.7);line-height:1.8;font-variant-numeric:tabular-nums;
}
.qr-box{
  background:#fff;border-radius:18px;padding:22px;text-align:center;color:var(--text);
}
.qr-code{
  width:100%;aspect-ratio:1/1;border-radius:12px;background:
    repeating-linear-gradient(45deg,#EDEAE4 0 10px,#F7F5F1 10px 20px);
  display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:13px;font-weight:700;
  border:1px solid var(--line);
}
.qr-box p{margin-top:14px;font-size:13.5px;color:var(--muted);line-height:1.7;}
.qr-box strong{display:block;font-size:14.5px;color:var(--text);margin-bottom:4px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--brand-dark);color:rgba(255,255,255,.72);margin-top:96px;padding:64px 0 26px;}
.footer-brand{display:flex;align-items:center;gap:14px;padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.14);}
.footer-brand .brand__mark{background:var(--accent);color:var(--brand-dark);}
.footer-brand strong{display:block;color:#fff;font-size:17px;font-weight:800;letter-spacing:-.01em;}
.footer-brand p{margin-top:4px;font-size:13.5px;color:rgba(255,255,255,.6);}
.footer-cols{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:36px;padding:40px 0;}
.footer-col h4{font-size:14px;color:#fff;font-weight:700;margin-bottom:16px;letter-spacing:.02em;}
.footer-col ul{list-style:none;display:grid;gap:10px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72);}
.footer-col a:hover{color:var(--accent);text-decoration:underline;}
.footer-col p{font-size:13.5px;line-height:1.8;color:rgba(255,255,255,.62);}
.footer-qr{
  margin-top:14px;width:112px;height:112px;border-radius:12px;border:1px solid rgba(255,255,255,.22);
  display:flex;align-items:center;justify-content:center;text-align:center;font-size:12px;line-height:1.5;
  color:rgba(255,255,255,.6);background:rgba(255,255,255,.05);
}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  padding-top:22px;border-top:1px solid rgba(255,255,255,.14);font-size:13px;color:rgba(255,255,255,.55);
}
.footer-bottom nav{display:flex;flex-wrap:wrap;gap:18px;}
.footer-bottom a{color:rgba(255,255,255,.65);}
.footer-bottom a:hover{color:var(--accent);}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .section{padding:72px 0;}
  .section--tight{padding:56px 0;}
  .header-search{max-width:280px;}
  .cat-hero__grid{grid-template-columns:1fr;gap:34px;}
  .module-grid{grid-template-columns:1fr;gap:0;}
  .flow{grid-template-columns:repeat(2,minmax(0,1fr));}
  .split{grid-template-columns:1fr;gap:36px;}
  .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .scene-card--wide{grid-column:span 2;flex-direction:column;}
  .scene-card--wide .scene-figure{flex:none;}
  .scene-card--wide .scene-figure img{aspect-ratio:16/9;}
  .download__grid{grid-template-columns:1fr;gap:34px;}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .section{padding:52px 0;}
  .section--tight{padding:44px 0;}
  .header-search,.header-meta{display:none;}
  .nav-toggle{display:inline-flex;}
  .brand__name{font-size:16px;}
  .channel{height:46px;padding:0 14px;font-size:14px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:16px;margin-bottom:30px;}
  .flow{grid-template-columns:1fr;}
  .spec-grid{grid-template-columns:1fr;}
  .scene-grid{grid-template-columns:1fr;}
  .scene-card--wide{grid-column:span 1;}
  .hero-stats{gap:14px 0;}
  .hero-stats div{padding:0 14px;}
  .hero-stats strong{font-size:17px;}
  .module-item{gap:16px;}
  .module-num{width:44px;font-size:27px;}
  .download{padding:38px 24px;border-radius:18px;}
  .dl-actions .btn{width:100%;}
  .footer-cols{grid-template-columns:1fr;gap:28px;padding:32px 0;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:479px){
  .cat-title{font-size:30px;}
  .faq-q{font-size:15.5px;padding:17px 18px;}
  .faq-a{padding:0 18px 18px;}
  .brand__mark{width:38px;height:38px;font-size:16px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
}