/* roulang page: index */
:root{
  --sy-bg:#050a16;
  --sy-bg-soft:#081226;
  --sy-panel:rgba(255,255,255,.055);
  --sy-panel-strong:rgba(255,255,255,.09);
  --sy-line:rgba(120,170,255,.22);
  --sy-line-soft:rgba(140,180,255,.13);
  --sy-text:#e9eefc;
  --sy-muted:#9aabcc;
  --sy-primary:#3b7bff;
  --sy-cyan:#22d3ee;
  --sy-violet:#7c5cff;
  --sy-warn:#ffb44d;
  --sy-radius:20px;
  --sy-radius-sm:12px;
  --sy-shadow:0 26px 60px rgba(2,8,24,.55);
  --sy-glow:0 10px 30px rgba(45,120,255,.38),0 0 24px rgba(34,211,238,.22);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--sy-text);
  background:
    radial-gradient(1200px 620px at 82% -12%,rgba(59,123,255,.28),rgba(5,10,22,0) 62%),
    radial-gradient(900px 520px at 2% 4%,rgba(34,211,238,.16),rgba(5,10,22,0) 60%),
    radial-gradient(760px 460px at 55% 40%,rgba(124,92,255,.12),rgba(5,10,22,0) 65%),
    var(--sy-bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body h1,body h2,body h3,body h4{color:var(--sy-text);font-weight:700;line-height:1.36;margin:0}
body h1{font-size:clamp(27px,3.3vw,44px);letter-spacing:-.4px}
body h2{font-size:clamp(22px,2.5vw,32px);letter-spacing:-.2px}
body h3{font-size:18px}
body p{margin:0 0 14px;color:var(--sy-muted);font-size:15.5px;line-height:1.85}
body a{color:#8fb6ff;text-decoration:none;transition:color .22s ease,opacity .22s ease}
body a:hover{color:#d5e4ff}
body ul,body ol{margin:0;padding:0;list-style:none}
body img{max-width:100%;height:auto;display:block}
body button,body input,body select,body textarea{font-family:inherit;font-size:15px}
body table{margin:0;border-collapse:collapse;width:100%}
body input[type="checkbox"]{margin:0}
::selection{background:rgba(59,123,255,.4);color:#fff}

.sy-container{width:100%;max-width:1220px;margin:0 auto;padding:0 22px}
.sy-glass{
  background:linear-gradient(160deg,rgba(255,255,255,.085),rgba(255,255,255,.02));
  border:1px solid var(--sy-line-soft);
  border-radius:var(--sy-radius);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  box-shadow:var(--sy-shadow);
}

/* header */
.sy-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,12,26,.78);
  border-bottom:1px solid var(--sy-line-soft);
  -webkit-backdrop-filter:blur(18px);
  backdrop-filter:blur(18px);
}
.sy-header__inner{display:flex;align-items:center;gap:22px;min-height:72px;flex-wrap:wrap;padding:10px 0}
.sy-brand{display:flex;align-items:center;gap:11px;min-width:0}
.sy-brand__mark{
  width:40px;height:40px;flex:0 0 40px;border-radius:13px;
  display:flex;align-items:center;justify-content:center;
  font-size:19px;font-weight:700;color:#fff;
  background:linear-gradient(135deg,#3b7bff,#22d3ee);
  box-shadow:0 8px 22px rgba(45,120,255,.42);
}
.sy-brand__text{display:flex;flex-direction:column;line-height:1.2;min-width:0}
.sy-brand__text strong{font-size:17px;color:var(--sy-text);letter-spacing:.2px;white-space:nowrap}
.sy-brand__text small{font-size:11.5px;color:var(--sy-muted);letter-spacing:.6px;white-space:nowrap}
.sy-nav{display:flex;align-items:center;gap:6px;margin-left:auto;flex-wrap:wrap}
.sy-nav__link{
  position:relative;display:inline-flex;align-items:center;gap:6px;
  padding:9px 14px;border-radius:999px;font-size:14.5px;color:#b8c7e4;
  transition:background .22s ease,color .22s ease;
}
.sy-nav__link:hover{background:rgba(120,170,255,.12);color:#eaf2ff}
.sy-nav__link.is-active{color:#fff;background:rgba(59,123,255,.2);box-shadow:inset 0 0 0 1px rgba(120,170,255,.34)}
.sy-nav__link:focus-visible{outline:2px solid #7cc4ff;outline-offset:2px}
.sy-lang{display:flex;align-items:center;gap:4px;padding:4px;border-radius:999px;background:rgba(255,255,255,.06);border:1px solid var(--sy-line-soft)}
.sy-lang__pill{padding:5px 12px;border-radius:999px;font-size:12.5px;color:var(--sy-muted);cursor:default;white-space:nowrap}
.sy-lang__pill.is-current{background:linear-gradient(135deg,rgba(59,123,255,.85),rgba(34,211,238,.75));color:#fff;font-weight:600;box-shadow:0 6px 16px rgba(45,120,255,.35)}

/* buttons */
.sy-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1.2;cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease;
}
.sy-btn:focus-visible{outline:2px solid #7cc4ff;outline-offset:3px}
.sy-btn--primary{
  color:#fff;
  background:linear-gradient(135deg,#3b7bff,#22d3ee);
  box-shadow:var(--sy-glow);
}
.sy-btn--primary:hover{transform:translateY(-2px);box-shadow:0 14px 38px rgba(45,120,255,.5),0 0 30px rgba(34,211,238,.35);color:#fff}
.sy-btn--ghost{color:#d7e6ff;background:rgba(255,255,255,.06);border-color:var(--sy-line)}
.sy-btn--ghost:hover{background:rgba(120,170,255,.16);border-color:rgba(140,190,255,.5);transform:translateY(-2px);color:#fff}
.sy-btn--sm{padding:9px 18px;font-size:14px}

/* hero */
.sy-hero{position:relative;padding:70px 0 64px;overflow:hidden}
.sy-hero::before{
  content:"";position:absolute;right:-160px;top:-120px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(59,123,255,.32),rgba(5,10,22,0) 68%);pointer-events:none;
}
.sy-hero__grid{position:relative;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:46px;align-items:center}
.sy-hero__copy{min-width:0}
.sy-badge{
  display:inline-flex;align-items:center;gap:8px;padding:7px 15px;border-radius:999px;
  font-size:13px;color:#a9d6ff;letter-spacing:.4px;
  background:rgba(59,123,255,.16);border:1px solid rgba(120,170,255,.32);
}
.sy-badge i{color:#4fd8f0}
.sy-hero h1{margin:20px 0 18px}
.sy-hero__lead{font-size:16px;color:#adbcda;max-width:600px}
.sy-group{
  display:inline-flex;align-items:center;gap:10px;margin:6px 0 22px;
  padding:10px 16px;border-radius:14px;font-size:14px;color:#ffe6bd;
  background:rgba(255,180,77,.1);border:1px solid rgba(255,180,77,.32);
}
.sy-group i{color:var(--sy-warn)}
.sy-hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:24px}
.sy-hero__tags{display:flex;flex-wrap:wrap;gap:10px}
.sy-hero__tags li{
  padding:7px 13px;border-radius:999px;font-size:13px;color:#a9bcdf;
  background:rgba(255,255,255,.05);border:1px solid var(--sy-line-soft);
}
.sy-hero__panel{padding:22px;min-width:0}
.sy-panel__head{display:flex;align-items:center;justify-content:space-between;padding-bottom:14px;border-bottom:1px solid var(--sy-line-soft);margin-bottom:16px}
.sy-panel__head span:first-child{font-size:14.5px;font-weight:600;color:#dbe7ff}
.sy-dot{display:inline-block;width:9px;height:9px;border-radius:50%;background:#37e0b0;box-shadow:0 0 12px rgba(55,224,176,.9)}
.sy-panel__row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:10px 0;border-bottom:1px dashed rgba(140,180,255,.14);font-size:14px}
.sy-panel__row:last-of-type{border-bottom:0}
.sy-panel__row span{color:var(--sy-muted)}
.sy-panel__row strong{color:#eaf2ff;font-weight:600}
.sy-panel__row strong.warn{color:var(--sy-warn)}
.sy-bar{height:9px;border-radius:999px;background:rgba(255,255,255,.08);overflow:hidden;margin:16px 0 8px}
.sy-bar__fill{height:100%;width:64%;border-radius:999px;background:linear-gradient(90deg,#22d3ee,#3b7bff);box-shadow:0 0 16px rgba(34,211,238,.6)}
.sy-panel__foot{font-size:12.5px;color:#7f90b3;line-height:1.7;margin:10px 0 0}

/* sections */
.sy-section{padding:82px 0;position:relative}
.sy-section--alt{background:linear-gradient(180deg,rgba(11,22,46,.72),rgba(6,12,26,.35));border-top:1px solid var(--sy-line-soft);border-bottom:1px solid var(--sy-line-soft)}
.sy-head{max-width:780px;margin:0 0 42px}
.sy-head.is-center{margin-left:auto;margin-right:auto;text-align:center}
.sy-eyebrow{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:14px;
  font-size:12.5px;letter-spacing:2px;color:#6fc6ff;text-transform:uppercase;
}
.sy-eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:linear-gradient(90deg,#22d3ee,#3b7bff)}
.sy-head p{margin:14px 0 0;font-size:15.5px;max-width:760px}

/* metric board */
.sy-metric-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.sy-metric{padding:24px;min-width:0;transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease}
.sy-metric:hover{transform:translateY(-4px);border-color:rgba(120,170,255,.42);box-shadow:0 26px 54px rgba(2,10,30,.62)}
.sy-metric__idx{display:inline-block;font-size:12px;letter-spacing:1.6px;color:#6fc6ff;margin-bottom:10px}
.sy-metric h3{margin-bottom:9px}
.sy-metric p{margin:0;font-size:14.5px}

/* feature */
.sy-feature-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.sy-feature{
  padding:26px 24px;border-radius:var(--sy-radius);min-width:0;
  background:linear-gradient(165deg,rgba(255,255,255,.07),rgba(255,255,255,.018));
  border:1px solid var(--sy-line-soft);
  transition:transform .25s ease,border-color .25s ease;
}
.sy-feature:hover{transform:translateY(-4px);border-color:rgba(120,170,255,.42)}
.sy-feature__icon{
  width:44px;height:44px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  margin-bottom:16px;font-size:18px;color:#bfe0ff;
  background:linear-gradient(135deg,rgba(59,123,255,.4),rgba(34,211,238,.28));
  border:1px solid rgba(140,190,255,.28);
}
.sy-feature h3{margin-bottom:9px;font-size:17.5px}
.sy-feature p{margin:0;font-size:14.5px}

/* scenes */
.sy-scene-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.sy-scene{
  padding:22px 20px;border-radius:16px;min-width:0;
  background:rgba(255,255,255,.045);border:1px solid var(--sy-line-soft);
  border-top:2px solid transparent;
  transition:border-color .25s ease,background .25s ease,transform .25s ease;
}
.sy-scene:hover{border-top-color:#3b7bff;background:rgba(59,123,255,.1);transform:translateY(-3px)}
.sy-scene h3{font-size:16px;margin-bottom:8px}
.sy-scene p{margin:0;font-size:14px}

/* topic entry */
.sy-topic{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:24px;align-items:stretch}
.sy-topic__card{padding:32px;min-width:0}
.sy-topic__card h3{font-size:21px;margin-bottom:12px}
.sy-topic__card p{font-size:15px}
.sy-topic__list{display:grid;gap:12px;margin:20px 0 24px}
.sy-topic__list li{display:flex;gap:10px;font-size:14.5px;color:#b3c3e0}
.sy-topic__list i{color:#4fd8f0;margin-top:5px}
.sy-topic__side{display:grid;gap:16px;min-width:0}
.sy-topic__mini{padding:22px;border-radius:16px;background:rgba(255,255,255,.045);border:1px solid var(--sy-line-soft)}
.sy-topic__mini strong{display:block;color:#e6efff;font-size:15.5px;margin-bottom:6px}
.sy-topic__mini span{font-size:13.5px;color:var(--sy-muted);line-height:1.7;display:block}

/* steps */
.sy-step-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;counter-reset:step}
.sy-step{position:relative;padding:26px 22px 22px;border-radius:16px;background:rgba(255,255,255,.045);border:1px solid var(--sy-line-soft);min-width:0}
.sy-step__num{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:11px;margin-bottom:14px;
  font-size:14px;font-weight:700;color:#fff;
  background:linear-gradient(135deg,#3b7bff,#22d3ee);box-shadow:0 8px 20px rgba(45,120,255,.4);
}
.sy-step h3{font-size:16px;margin-bottom:8px}
.sy-step p{margin:0;font-size:14px}

/* demo stage */
.sy-demo{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:36px;align-items:center}
.sy-stage{padding:24px;min-width:0}
.sy-stage__bar{display:flex;gap:6px;margin-bottom:16px}
.sy-stage__bar i{width:9px;height:9px;border-radius:50%;background:rgba(255,255,255,.22)}
.sy-stage__bar i:first-child{background:#ff7a7a}
.sy-stage__bar i:nth-child(2){background:#ffc46b}
.sy-stage__bar i:last-child{background:#5fe0a8}
.sy-stage__row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:11px 0;border-bottom:1px dashed rgba(140,180,255,.14);font-size:14px}
.sy-stage__row:last-child{border-bottom:0}
.sy-stage__row span{color:var(--sy-muted)}
.sy-stage__row b{color:#eaf2ff;font-weight:600}
.sy-stage__note{margin:16px 0 0;font-size:12.5px;color:#8194b8;line-height:1.7}

/* table */
.sy-table-wrap{width:100%;overflow-x:auto;border-radius:var(--sy-radius);border:1px solid var(--sy-line-soft);background:rgba(255,255,255,.035)}
.sy-table{width:100%;min-width:620px;border-collapse:collapse;font-size:14.5px}
.sy-table th,.sy-table td{padding:15px 18px;text-align:left;border-bottom:1px solid rgba(140,180,255,.12);color:#c3d1ea}
.sy-table thead th{background:rgba(59,123,255,.16);color:#e6efff;font-weight:600;font-size:14px;letter-spacing:.4px;white-space:nowrap}
.sy-table tbody tr:last-child td{border-bottom:0}
.sy-table tbody tr:hover td{background:rgba(120,170,255,.07)}
.sy-table td.is-good{color:#7ef0c4}
.sy-table td.is-bad{color:#ffb0b0}

/* level compare */
.sy-level-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.sy-level{padding:26px 24px;border-radius:var(--sy-radius);border:1px solid var(--sy-line-soft);background:rgba(255,255,255,.045);min-width:0;transition:transform .25s ease,border-color .25s ease}
.sy-level:hover{transform:translateY(-4px);border-color:rgba(120,170,255,.4)}
.sy-level__tag{display:inline-block;padding:5px 12px;border-radius:999px;font-size:12.5px;margin-bottom:14px;background:rgba(34,211,238,.14);color:#8fe8f8;border:1px solid rgba(34,211,238,.3)}
.sy-level h3{font-size:17px;margin-bottom:10px}
.sy-level p{font-size:14px;margin-bottom:12px}
.sy-level ul{display:grid;gap:8px}
.sy-level li{font-size:13.8px;color:#a9b9d8;display:flex;gap:8px}
.sy-level li::before{content:"";width:6px;height:6px;border-radius:50%;background:#3b7bff;margin-top:8px;flex:0 0 6px}

/* timeline */
.sy-timeline{position:relative;display:grid;gap:6px;padding-left:8px}
.sy-timeline::before{content:"";position:absolute;left:17px;top:8px;bottom:8px;width:2px;background:linear-gradient(180deg,#22d3ee,rgba(59,123,255,.15))}
.sy-timeline__item{position:relative;padding:0 0 26px 52px;min-width:0}
.sy-timeline__item:last-child{padding-bottom:0}
.sy-timeline__dot{position:absolute;left:6px;top:6px;width:24px;height:24px;border-radius:50%;background:linear-gradient(135deg,#3b7bff,#22d3ee);box-shadow:0 0 0 5px rgba(59,123,255,.14)}
.sy-timeline__item h3{font-size:16.5px;margin-bottom:8px}
.sy-timeline__item p{margin:0;font-size:14.5px}

/* guard */
.sy-guard-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.sy-guard{display:flex;gap:13px;padding:20px;border-radius:14px;background:rgba(255,255,255,.045);border:1px solid var(--sy-line-soft);min-width:0}
.sy-guard i{color:#5fe0a8;font-size:17px;margin-top:3px}
.sy-guard div{min-width:0}
.sy-guard strong{display:block;font-size:15px;color:#e6efff;margin-bottom:5px}
.sy-guard span{font-size:13.6px;color:var(--sy-muted);line-height:1.7}

/* quick answers */
.sy-quick-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.sy-quick{padding:24px;border-radius:16px;background:linear-gradient(160deg,rgba(59,123,255,.14),rgba(255,255,255,.03));border:1px solid var(--sy-line-soft);min-width:0}
.sy-quick h3{font-size:16.5px;margin-bottom:10px}
.sy-quick p{margin:0;font-size:14.5px}

/* news */
.sy-news-grid{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(0,1fr);gap:24px;align-items:start}
.sy-news-main{display:grid;gap:16px;min-width:0}
.sy-post{
  padding:22px 24px;border-radius:16px;min-width:0;
  background:rgba(255,255,255,.045);border:1px solid var(--sy-line-soft);
  transition:transform .22s ease,border-color .22s ease,background .22s ease;
}
.sy-post:hover{transform:translateY(-3px);border-color:rgba(120,170,255,.4);background:rgba(59,123,255,.09)}
.sy-post__title{display:block;font-size:17px;font-weight:600;color:#eaf2ff;line-height:1.5;margin-bottom:9px}
.sy-post__title:hover{color:#8fc4ff}
.sy-post__desc{margin:0 0 12px;font-size:14.2px;color:var(--sy-muted)}
.sy-post__meta{display:flex;flex-wrap:wrap;gap:14px;font-size:12.8px;color:#7f92b6}
.sy-post__meta span{display:inline-flex;align-items:center;gap:6px}
.sy-news-side{padding:22px;border-radius:16px;background:rgba(255,255,255,.04);border:1px solid var(--sy-line-soft);min-width:0}
.sy-news-side h3{font-size:16px;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--sy-line-soft)}
.sy-side-item{display:block;padding:12px 0;border-bottom:1px dashed rgba(140,180,255,.14);font-size:14px;color:#c3d1ea;line-height:1.6}
.sy-side-item:last-child{border-bottom:0;padding-bottom:0}
.sy-side-item:hover{color:#8fc4ff}
.sy-side-item small{display:block;font-size:12.4px;color:#7f92b6;margin-top:4px}
.sy-empty{padding:26px 24px;border-radius:16px;background:rgba(255,255,255,.04);border:1px dashed var(--sy-line);color:var(--sy-muted);font-size:14.5px;margin:0}

/* download */
.sy-download{padding:38px;border-radius:26px;background:linear-gradient(135deg,rgba(59,123,255,.22),rgba(34,211,238,.1) 55%,rgba(124,92,255,.16));border:1px solid rgba(120,170,255,.34);box-shadow:0 30px 70px rgba(2,10,30,.6)}
.sy-download__head{display:flex;flex-wrap:wrap;gap:18px;align-items:flex-end;justify-content:space-between;margin-bottom:26px}
.sy-download__head h2{margin:0}
.sy-download__head p{margin:8px 0 0;font-size:14.5px;max-width:620px}
.sy-dl-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.sy-dl{
  display:flex;align-items:center;gap:14px;padding:18px 20px;border-radius:16px;
  background:rgba(6,12,26,.55);border:1px solid rgba(140,190,255,.28);color:#e9f1ff;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;min-width:0;
}
.sy-dl:hover{transform:translateY(-3px);border-color:rgba(140,190,255,.62);box-shadow:0 16px 36px rgba(30,90,220,.35);color:#fff}
.sy-dl i{font-size:22px;color:#6fd9f2;flex:0 0 auto}
.sy-dl span{display:block;min-width:0}
.sy-dl strong{display:block;font-size:15.5px;margin-bottom:3px}
.sy-dl small{font-size:12.6px;color:#9fb2d4}

/* form */
.sy-form{padding:32px;border-radius:22px;background:rgba(255,255,255,.045);border:1px solid var(--sy-line-soft);min-width:0}
.sy-check{display:grid;gap:12px;margin:22px 0 20px}
.sy-check__row{
  display:flex;align-items:flex-start;gap:12px;padding:14px 16px;border-radius:12px;
  background:rgba(255,255,255,.04);border:1px solid var(--sy-line-soft);
  font-size:14.4px;color:#c3d1ea;cursor:pointer;transition:background .2s ease,border-color .2s ease;
}
.sy-check__row:hover{background:rgba(59,123,255,.12);border-color:rgba(120,170,255,.4)}
.sy-check__row input{
  appearance:none;-webkit-appearance:none;
  width:18px;height:18px;flex:0 0 18px;margin-top:3px;border-radius:6px;
  border:1.5px solid rgba(140,180,255,.5);background:rgba(6,12,26,.6);cursor:pointer;position:relative;
  transition:background .2s ease,border-color .2s ease;
}
.sy-check__row input:checked{background:linear-gradient(135deg,#3b7bff,#22d3ee);border-color:#4fd8f0}
.sy-check__row input:checked::after{
  content:"";position:absolute;left:5px;top:1px;width:5px;height:10px;
  border:solid #fff;border-width:0 2px 2px 0;transform:rotate(45deg);
}
.sy-check__row input:focus-visible{outline:2px solid #7cc4ff;outline-offset:2px}
.sy-form__actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.sy-form__result{margin:18px 0 0;padding:14px 16px;border-radius:12px;font-size:14px;color:#bfe8ff;background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.3);line-height:1.75}
.sy-form__note{margin:14px 0 0;font-size:12.8px;color:#8194b8;line-height:1.7}

/* faq */
.sy-faq{display:grid;gap:14px;max-width:920px}
.sy-faq__item{border-radius:14px;border:1px solid var(--sy-line-soft);background:rgba(255,255,255,.04);overflow:hidden}
.sy-faq__item summary{
  list-style:none;cursor:pointer;padding:18px 54px 18px 22px;position:relative;
  font-size:15.6px;font-weight:600;color:#e6efff;transition:background .2s ease;
}
.sy-faq__item summary::-webkit-details-marker{display:none}
.sy-faq__item summary::after{
  content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);
  font-size:20px;color:#6fc6ff;font-weight:400;transition:transform .25s ease;
}
.sy-faq__item[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.sy-faq__item summary:hover{background:rgba(59,123,255,.12)}
.sy-faq__item summary:focus-visible{outline:2px solid #7cc4ff;outline-offset:-2px}
.sy-faq__body{padding:0 22px 20px;font-size:14.5px;color:var(--sy-muted);line-height:1.85;margin:0}

/* footer */
.sy-footer{margin-top:20px;padding:56px 0 26px;background:rgba(4,9,20,.85);border-top:1px solid var(--sy-line-soft)}
.sy-footer__grid{display:grid;grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,1fr));gap:32px}
.sy-footer__brand p{font-size:14px;margin:16px 0 0;max-width:340px}
.sy-footer__col h4{font-size:14.5px;color:#dbe7ff;margin-bottom:14px;letter-spacing:.4px}
.sy-footer__col ul{display:grid;gap:10px}
.sy-footer__col a{font-size:14px;color:#9fb0d2}
.sy-footer__col a:hover{color:#8fc4ff}
.sy-footer__col li span{font-size:14px;color:#8ba0c4}
.sy-footer__bottom{
  margin-top:38px;padding-top:20px;border-top:1px solid var(--sy-line-soft);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:#7789ab;
}

/* responsive */
@media (max-width:1024px){
  .sy-hero__grid{grid-template-columns:1fr;gap:34px}
  .sy-metric-grid,.sy-feature-grid,.sy-level-grid,.sy-guard-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .sy-scene-grid,.sy-step-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .sy-topic{grid-template-columns:1fr}
  .sy-demo{grid-template-columns:1fr;gap:26px}
  .sy-news-grid{grid-template-columns:1fr}
  .sy-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:768px){
  .sy-section{padding:60px 0}
  .sy-hero{padding:52px 0 46px}
  .sy-header__inner{gap:14px}
  .sy-nav{margin-left:0;width:100%;overflow-x:auto;flex-wrap:nowrap;padding-bottom:4px}
  .sy-nav__link{white-space:nowrap}
  .sy-lang{margin-left:auto}
  .sy-quick-grid{grid-template-columns:1fr}
  .sy-dl-grid{grid-template-columns:1fr}
  .sy-download{padding:26px 20px}
  .sy-form{padding:24px 20px}
  .sy-table{min-width:560px}
}
@media (max-width:520px){
  .sy-container{padding:0 16px}
  .sy-metric-grid,.sy-feature-grid,.sy-level-grid,.sy-guard-grid,.sy-scene-grid,.sy-step-grid{grid-template-columns:1fr}
  .sy-hero__actions{flex-direction:column;align-items:stretch}
  .sy-hero__actions .sy-btn{width:100%}
  .sy-footer__grid{grid-template-columns:1fr;gap:26px}
  .sy-brand__text strong{font-size:16px}
  .sy-brand__text small{font-size:11px}
  .sy-faq__item summary{padding:16px 48px 16px 18px;font-size:15px}
  .sy-faq__body{padding:0 18px 18px}
  .sy-timeline__item{padding-left:44px}
  .sy-timeline::before{left:15px}
  .sy-timeline__dot{left:4px;width:22px;height:22px}
}

/* roulang page: category1 */
:root{
  --sy-bg:#050a16;
  --sy-bg-soft:#081226;
  --sy-panel:rgba(255,255,255,.055);
  --sy-panel-strong:rgba(255,255,255,.09);
  --sy-line:rgba(120,170,255,.22);
  --sy-line-soft:rgba(140,180,255,.13);
  --sy-text:#e9eefc;
  --sy-muted:#9aabcc;
  --sy-primary:#3b7bff;
  --sy-cyan:#22d3ee;
  --sy-violet:#7c5cff;
  --sy-warn:#ffb44d;
  --sy-radius:20px;
  --sy-radius-sm:12px;
  --sy-shadow:0 26px 60px rgba(2,8,24,.55);
  --sy-glow:0 10px 30px rgba(45,120,255,.38),0 0 24px rgba(34,211,238,.22);
}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--sy-text);
  background:
    radial-gradient(1200px 620px at 82% -12%,rgba(59,123,255,.28),rgba(5,10,22,0) 62%),
    radial-gradient(900px 520px at 2% 4%,rgba(34,211,238,.16),rgba(5,10,22,0) 60%),
    radial-gradient(760px 460px at 55% 40%,rgba(124,92,255,.12),rgba(5,10,22,0) 65%),
    var(--sy-bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body h1,body h2,body h3,body h4{color:var(--sy-text);font-weight:700;line-height:1.36;margin:0}
body h1{font-size:clamp(27px,3.2vw,42px);letter-spacing:-.4px}
body h2{font-size:clamp(22px,2.4vw,31px);letter-spacing:-.2px}
body h3{font-size:18px}
body p{margin:0 0 14px;color:var(--sy-muted);font-size:15.5px;line-height:1.85}
body a{color:#8fb6ff;text-decoration:none;transition:color .22s ease,opacity .22s ease}
body a:hover{color:#d5e4ff}
body ul,body ol{margin:0;padding:0;list-style:none}
body img{max-width:100%;height:auto;display:block}
body button,body input,body select,body textarea{font-family:inherit;font-size:15px}
.sy-container{width:100%;max-width:1220px;margin:0 auto;padding:0 22px}
/* header */
.sy-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,12,26,.78);
  border-bottom:1px solid var(--sy-line-soft);
  -webkit-backdrop-filter:blur(18px);
  backdrop-filter:blur(18px);
}
.sy-header__inner{display:flex;align-items:center;gap:22px;min-height:72px;flex-wrap:wrap;padding:10px 0}
.sy-brand{display:flex;align-items:center;gap:11px;min-width:0}
.sy-brand__mark{
  width:40px;height:40px;flex:0 0 40px;border-radius:13px;
  display:flex;align-items:center;justify-content:center;
  font-size:19px;font-weight:700;color:#fff;
  background:linear-gradient(135deg,#3b7bff,#22d3ee);
  box-shadow:0 8px 22px rgba(45,120,255,.42);
}
.sy-brand__text{display:flex;flex-direction:column;line-height:1.2;min-width:0}
.sy-brand__text strong{font-size:17px;color:var(--sy-text);letter-spacing:.2px;white-space:nowrap}
.sy-brand__text small{font-size:11.5px;color:var(--sy-muted);letter-spacing:.6px;white-space:nowrap}
.sy-nav{display:flex;align-items:center;gap:6px;margin-left:auto;flex-wrap:wrap}
.sy-nav__link{
  position:relative;display:inline-flex;align-items:center;gap:6px;
  padding:9px 14px;border-radius:999px;font-size:14.5px;color:#b8c7e4;
  transition:background .22s ease,color .22s ease;
}
.sy-nav__link:hover{background:rgba(120,170,255,.12);color:#eaf2ff}
.sy-nav__link.is-active{color:#fff;background:rgba(59,123,255,.2);box-shadow:inset 0 0 0 1px rgba(120,170,255,.34)}
.sy-nav__link:focus-visible{outline:2px solid #7cc4ff;outline-offset:2px}
.sy-lang{display:flex;align-items:center;gap:6px;margin-left:6px}
.sy-lang__pill{padding:5px 12px;border-radius:999px;font-size:12.5px;color:var(--sy-muted);cursor:default;white-space:nowrap}
.sy-lang__pill.is-current{background:linear-gradient(135deg,rgba(59,123,255,.85),rgba(34,211,238,.75));color:#fff;font-weight:600;box-shadow:0 6px 16px rgba(45,120,255,.35)}
/* buttons */
.sy-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1.2;cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease;
}
.sy-btn:focus-visible{outline:2px solid #7cc4ff;outline-offset:3px}
.sy-btn--primary{color:#fff;background:linear-gradient(135deg,#3b7bff,#22d3ee);box-shadow:var(--sy-glow)}
.sy-btn--primary:hover{transform:translateY(-2px);box-shadow:0 14px 38px rgba(45,120,255,.5),0 0 30px rgba(34,211,238,.35);color:#fff}
.sy-btn--ghost{color:#d7e6ff;background:rgba(255,255,255,.06);border-color:var(--sy-line)}
.sy-btn--ghost:hover{background:rgba(120,170,255,.16);border-color:rgba(140,190,255,.5);transform:translateY(-2px);color:#fff}
.sy-btn--sm{padding:9px 18px;font-size:14px}
/* shared bits */
.sy-badge{
  display:inline-flex;align-items:center;gap:8px;padding:7px 15px;border-radius:999px;
  font-size:13px;color:#a9d6ff;letter-spacing:.4px;
  background:rgba(59,123,255,.16);border:1px solid rgba(120,170,255,.32);
}
.sy-badge i{color:#4fd8f0}
.sy-glass{
  background:var(--sy-panel);
  border:1px solid var(--sy-line);
  border-radius:var(--sy-radius);
  box-shadow:var(--sy-shadow);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
}
/* ===== 分类页专属 ===== */
.cat-hero{position:relative;padding:64px 0 58px;overflow:hidden}
.cat-hero::before{
  content:"";position:absolute;right:-180px;top:-140px;width:540px;height:540px;border-radius:50%;
  background:radial-gradient(circle,rgba(59,123,255,.3),rgba(5,10,22,0) 68%);pointer-events:none;
}
.cat-hero__grid{position:relative;display:grid;grid-template-columns:minmax(0,1.06fr) minmax(0,.94fr);gap:44px;align-items:start}
.cat-hero h1{margin:20px 0 16px}
.cat-hero__lead{font-size:16px;color:#adbcda;max-width:620px}
.cat-hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin:24px 0 22px}
.cat-hero__tags{display:flex;flex-wrap:wrap;gap:10px}
.cat-hero__tags li{
  padding:7px 13px;border-radius:999px;font-size:13px;color:#a9bcdf;
  background:rgba(255,255,255,.05);border:1px solid var(--sy-line-soft);
}
.cat-roadmap{padding:22px 22px 18px;min-width:0}
.cat-roadmap__head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}
.cat-roadmap__head h2{font-size:16px;letter-spacing:.4px}
.cat-roadmap__head span{font-size:12px;color:#7f95bd}
.cat-node{display:grid;grid-template-columns:18px minmax(0,1fr);gap:12px;padding:11px 0;position:relative}
.cat-node:not(:last-child)::before{
  content:"";position:absolute;left:8px;top:30px;bottom:-4px;width:1px;
  background:linear-gradient(180deg,rgba(120,170,255,.45),rgba(120,170,255,.05));
}
.cat-node__dot{
  width:12px;height:12px;margin-top:7px;border-radius:50%;
  background:linear-gradient(135deg,#3b7bff,#22d3ee);
  box-shadow:0 0 14px rgba(34,211,238,.6);
}
.cat-node__body strong{display:block;font-size:14.5px;color:#eaf2ff;font-weight:600}
.cat-node__body span{font-size:13px;color:var(--sy-muted)}
.cat-roadmap__foot{margin-top:14px;padding-top:14px;border-top:1px dashed rgba(140,180,255,.16);font-size:13px;color:#8ba2c8}
.cat-section{padding:78px 0;position:relative}
.cat-section--alt{
  background:linear-gradient(180deg,rgba(11,22,46,.72),rgba(6,12,26,.32));
  border-top:1px solid var(--sy-line-soft);
  border-bottom:1px solid var(--sy-line-soft);
}
.cat-head{max-width:780px;margin-bottom:38px}
.cat-eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:12px;font-size:12.5px;letter-spacing:2px;color:#6fc6ff;text-transform:uppercase}
.cat-head p{margin:12px 0 0;font-size:15.5px}
.metric-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.metric-card{
  padding:22px 20px;border-radius:var(--sy-radius);min-width:0;
  background:var(--sy-panel);border:1px solid var(--sy-line-soft);
  transition:transform .24s ease,border-color .24s ease,background .24s ease;
}
.metric-card:hover{transform:translateY(-3px);border-color:rgba(140,190,255,.45);background:var(--sy-panel-strong)}
.metric-card__label{display:flex;align-items:center;gap:8px;font-size:13px;color:#87b9ff;letter-spacing:.4px;margin-bottom:10px}
.metric-card__label i{color:#22d3ee}
.metric-card h3{font-size:16.5px;margin-bottom:8px}
.metric-card p{font-size:14px;margin:0;line-height:1.8}
.metric-card code{
  display:inline-block;margin-top:10px;padding:5px 10px;border-radius:8px;
  font-size:12.5px;color:#a8e6ff;background:rgba(34,211,238,.1);
  border:1px solid rgba(34,211,238,.24);font-family:ui-monospace,Consolas,monospace;
  white-space:normal;
}
.term-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.term-card{
  padding:22px 22px;border-radius:var(--sy-radius);min-width:0;
  background:rgba(255,255,255,.04);border:1px solid var(--sy-line-soft);
  border-left:3px solid rgba(59,123,255,.65);
  transition:background .24s ease,border-left-color .24s ease,transform .24s ease;
}
.term-card:hover{background:rgba(255,255,255,.07);border-left-color:#22d3ee;transform:translateY(-2px)}
.term-card__top{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;margin-bottom:8px}
.term-card h3{font-size:16.5px}
.term-card__en{font-size:12px;color:#6f86ad;letter-spacing:.6px}
.term-card p{font-size:14.2px;margin:0}
.scene-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.scene-card{
  padding:24px 22px;border-radius:var(--sy-radius);min-width:0;
  background:linear-gradient(160deg,rgba(59,123,255,.14),rgba(255,255,255,.03));
  border:1px solid var(--sy-line);
  transition:transform .24s ease,box-shadow .24s ease;
}
.scene-card:hover{transform:translateY(-4px);box-shadow:0 20px 44px rgba(2,10,30,.6)}
.scene-card__icon{
  width:44px;height:44px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  margin-bottom:14px;font-size:18px;color:#eaf6ff;
  background:linear-gradient(135deg,rgba(59,123,255,.9),rgba(34,211,238,.8));
  box-shadow:0 10px 24px rgba(45,120,255,.35);
}
.scene-card h3{font-size:16.5px;margin-bottom:8px}
.scene-card p{font-size:14.2px;margin:0}
.compare-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.compare-card{padding:26px 24px;border-radius:var(--sy-radius);min-width:0;border:1px solid var(--sy-line-soft);background:rgba(255,255,255,.04)}
.compare-card--accent{border-color:rgba(34,211,238,.35);background:linear-gradient(165deg,rgba(34,211,238,.1),rgba(255,255,255,.03))}
.compare-card h3{font-size:17px;margin-bottom:16px;display:flex;align-items:center;gap:9px}
.compare-card h3 i{color:#22d3ee;font-size:15px}
.compare-list li{
  position:relative;padding-left:22px;margin-bottom:12px;font-size:14.4px;color:var(--sy-muted);line-height:1.8;
}
.compare-list li:last-child{margin-bottom:0}
.compare-list li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;
  background:rgba(120,170,255,.6);
}
.compare-card--accent .compare-list li::before{background:#22d3ee}
.step-list{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.step-item{
  padding:22px 20px;border-radius:var(--sy-radius);min-width:0;position:relative;
  background:var(--sy-panel);border:1px solid var(--sy-line-soft);
}
.step-item__num{
  display:inline-flex;align-items:center;justify-content:center;
  width:32px;height:32px;border-radius:10px;margin-bottom:12px;
  font-size:14px;font-weight:700;color:#04101f;
  background:linear-gradient(135deg,#22d3ee,#8fb6ff);
}
.step-item h3{font-size:15.8px;margin-bottom:8px}
.step-item p{font-size:14px;margin:0}
.post-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.post-card{
  display:flex;flex-direction:column;padding:22px 20px;border-radius:var(--sy-radius);min-width:0;
  background:rgba(255,255,255,.045);border:1px solid var(--sy-line-soft);
  transition:transform .24s ease,border-color .24s ease,background .24s ease;
}
.post-card:hover{transform:translateY(-3px);border-color:rgba(140,190,255,.45);background:rgba(255,255,255,.075)}
.post-card__meta{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
.post-card__meta span{
  padding:4px 10px;border-radius:999px;font-size:12px;color:#a9d6ff;
  background:rgba(59,123,255,.16);border:1px solid rgba(120,170,255,.26);
}
.post-card h3{font-size:16px;margin-bottom:10px;line-height:1.55}
.post-card h3 a{color:#eaf2ff}
.post-card h3 a:hover{color:#8fd6ff}
.post-card__desc{font-size:14px;color:var(--sy-muted);margin:0 0 16px;flex:1 1 auto}
.post-card__more{font-size:13.5px;color:#6fc6ff;display:inline-flex;align-items:center;gap:6px}
.post-card__more:hover{color:#c6ecff}
.cat-empty{
  padding:28px 24px;border-radius:var(--sy-radius);
  background:rgba(255,255,255,.04);border:1px dashed rgba(140,180,255,.28);
  font-size:14.5px;color:var(--sy-muted);
}
.guard-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.guard-item{
  display:grid;grid-template-columns:38px minmax(0,1fr);gap:14px;align-items:start;
  padding:20px;border-radius:var(--sy-radius);min-width:0;
  background:rgba(255,255,255,.04);border:1px solid var(--sy-line-soft);
}
.guard-item i{font-size:17px;color:#22d3ee;margin-top:4px}
.guard-item h3{font-size:15.8px;margin-bottom:6px}
.guard-item p{font-size:14px;margin:0}
.faq-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;align-items:start}
.faq-item{
  border-radius:var(--sy-radius-sm);border:1px solid var(--sy-line-soft);
  background:rgba(255,255,255,.04);overflow:hidden;min-width:0;
}
.faq-item summary{
  cursor:pointer;list-style:none;padding:16px 44px 16px 18px;position:relative;
  font-size:15.2px;font-weight:600;color:#e6eeff;line-height:1.6;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"\002B";position:absolute;right:16px;top:50%;transform:translateY(-50%);
  font-size:18px;color:#6fc6ff;transition:transform .2s ease;
}
.faq-item[open] summary::after{content:"\2212"}
.faq-item summary:hover{background:rgba(120,170,255,.08)}
.faq-item summary:focus-visible{outline:2px solid #7cc4ff;outline-offset:-2px}
.faq-item__body{padding:0 18px 18px;font-size:14.2px;color:var(--sy-muted);line-height:1.85}
.dl-panel{
  padding:34px 32px;border-radius:calc(var(--sy-radius) + 6px);
  background:linear-gradient(150deg,rgba(59,123,255,.2),rgba(34,211,238,.09) 55%,rgba(255,255,255,.03));
  border:1px solid var(--sy-line);box-shadow:var(--sy-shadow);
}
.dl-panel__grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:30px;align-items:center}
.dl-panel h2{font-size:clamp(21px,2.2vw,28px);margin-bottom:10px}
.dl-panel p{font-size:14.6px;margin:0}
.dl-buttons{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.dl-btn{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:7px;
  padding:18px 12px;border-radius:16px;text-align:center;min-width:0;
  background:rgba(255,255,255,.07);border:1px solid var(--sy-line);
  color:#e6eeff;transition:transform .22s ease,background .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.dl-btn i{font-size:20px;color:#7fe0f5}
.dl-btn strong{font-size:14.5px;font-weight:600;color:#eaf4ff}
.dl-btn span{font-size:12px;color:#8ba2c8}
.dl-btn:hover{transform:translateY(-3px);background:rgba(59,123,255,.24);border-color:rgba(140,190,255,.55);box-shadow:0 16px 36px rgba(20,80,200,.4);color:#fff}
.dl-btn:hover i{color:#c8f4ff}
.dl-btn:focus-visible{outline:2px solid #7cc4ff;outline-offset:3px}
.risk-note{
  margin-top:22px;padding:16px 20px;border-radius:var(--sy-radius-sm);
  background:rgba(255,180,77,.08);border:1px solid rgba(255,180,77,.28);
  font-size:13.5px;color:#e8c48a;line-height:1.8;
}
/* footer */
.sy-footer{
  padding:62px 0 26px;border-top:1px solid var(--sy-line-soft);
  background:linear-gradient(180deg,rgba(8,18,38,.6),rgba(4,8,18,.92));
}
.sy-footer__grid{display:grid;grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,1fr));gap:34px}
.sy-footer__brand p{font-size:14px;max-width:360px;margin:16px 0 0;line-height:1.85}
.sy-footer__col h4{font-size:15px;margin-bottom:14px;color:#dfe9ff}
.sy-footer__col ul li{margin-bottom:9px;font-size:14px;color:var(--sy-muted)}
.sy-footer__col ul li a{color:#9db4da}
.sy-footer__col ul li a:hover{color:#d5e4ff}
.sy-footer__bottom{
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  margin-top:36px;padding-top:20px;border-top:1px solid var(--sy-line-soft);
  font-size:13px;color:#7f92b4;
}
@media screen and (max-width:1024px){
  .cat-hero__grid{grid-template-columns:minmax(0,1fr);gap:34px}
  .metric-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .step-list{grid-template-columns:repeat(2,minmax(0,1fr))}
  .post-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .dl-panel__grid{grid-template-columns:minmax(0,1fr);gap:24px}
  .sy-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .cat-section{padding:64px 0}
}
@media screen and (max-width:768px){
  .sy-header__inner{gap:12px}
  .sy-nav{margin-left:0;width:100%;order:3;gap:6px;overflow-x:auto;padding-bottom:4px;-webkit-overflow-scrolling:touch}
  .sy-nav__link{white-space:nowrap;font-size:14px;padding:8px 13px}
  .sy-lang{margin-left:auto}
  .metric-grid,.term-grid,.scene-grid,.compare-grid,.guard-grid,.faq-list,.step-list,.post-grid{grid-template-columns:minmax(0,1fr)}
  .dl-buttons{grid-template-columns:minmax(0,1fr)}
  .sy-footer__grid{grid-template-columns:minmax(0,1fr);gap:26px}
  .cat-hero{padding:44px 0 40px}
  .cat-section{padding:52px 0}
  .cat-head{margin-bottom:28px}
  .dl-panel{padding:26px 20px}
}
@media screen and (max-width:520px){
  .sy-container{padding:0 16px}
  body h1{font-size:25px}
  body h2{font-size:21px}
  .sy-brand__text strong{font-size:16px}
  .sy-brand__text small{font-size:11px}
  .sy-hero__actions .sy-btn,.cat-hero__actions .sy-btn{width:100%}
  .sy-btn{padding:12px 20px}
  .cat-roadmap{padding:18px 16px 14px}
  .sy-footer__bottom{font-size:12.5px}
}

/* roulang page: article */
:root{
  --sy-bg:#050a16;
  --sy-bg-soft:#081226;
  --sy-panel:rgba(255,255,255,.055);
  --sy-panel-strong:rgba(255,255,255,.09);
  --sy-line:rgba(120,170,255,.22);
  --sy-line-soft:rgba(140,180,255,.13);
  --sy-text:#e9eefc;
  --sy-muted:#9aabcc;
  --sy-primary:#3b7bff;
  --sy-cyan:#22d3ee;
  --sy-violet:#7c5cff;
  --sy-warn:#ffb44d;
  --sy-radius:20px;
  --sy-radius-sm:12px;
  --sy-shadow:0 26px 60px rgba(2,8,24,.55);
  --sy-glow:0 10px 30px rgba(45,120,255,.38),0 0 24px rgba(34,211,238,.22);
}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
*,*::before,*::after{box-sizing:border-box}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--sy-text);
  background:
    radial-gradient(1200px 620px at 82% -12%,rgba(59,123,255,.28),rgba(5,10,22,0) 62%),
    radial-gradient(900px 520px at 2% 4%,rgba(34,211,238,.16),rgba(5,10,22,0) 60%),
    radial-gradient(760px 460px at 55% 40%,rgba(124,92,255,.12),rgba(5,10,22,0) 65%),
    var(--sy-bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body h1,body h2,body h3,body h4{color:var(--sy-text);font-weight:700;line-height:1.36;margin:0}
body h1{font-size:clamp(26px,3.1vw,42px);letter-spacing:-.4px}
body h2{font-size:clamp(21px,2.3vw,30px);letter-spacing:-.2px}
body h3{font-size:18px}
body h4{font-size:15px}
body p{margin:0 0 14px;color:var(--sy-muted);font-size:15.5px;line-height:1.85}
body a{color:#8fb6ff;text-decoration:none;transition:color .22s ease,opacity .22s ease}
body a:hover{color:#d5e4ff}
body ul,body ol{margin:0;padding:0;list-style:none}
body img{max-width:100%;height:auto;display:block}
body button,body input,body select,body textarea{font-family:inherit;font-size:15px}
.sy-container{width:100%;max-width:1220px;margin:0 auto;padding:0 22px}
/* header */
.sy-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,12,26,.78);
  border-bottom:1px solid var(--sy-line-soft);
  -webkit-backdrop-filter:blur(18px);
  backdrop-filter:blur(18px);
}
.sy-header__inner{display:flex;align-items:center;gap:22px;min-height:72px;flex-wrap:wrap;padding:10px 0}
.sy-brand{display:flex;align-items:center;gap:11px;min-width:0}
.sy-brand__mark{
  width:40px;height:40px;flex:0 0 40px;border-radius:13px;
  display:flex;align-items:center;justify-content:center;
  font-size:19px;font-weight:700;color:#fff;
  background:linear-gradient(135deg,#3b7bff,#22d3ee);
  box-shadow:0 8px 22px rgba(45,120,255,.42);
}
.sy-brand__text{display:flex;flex-direction:column;line-height:1.2;min-width:0}
.sy-brand__text strong{font-size:17px;color:var(--sy-text);letter-spacing:.2px;white-space:nowrap}
.sy-brand__text small{font-size:11.5px;color:var(--sy-muted);letter-spacing:.6px;white-space:nowrap}
.sy-nav{display:flex;align-items:center;gap:6px;margin-left:auto;flex-wrap:wrap}
.sy-nav__link{
  position:relative;display:inline-flex;align-items:center;gap:6px;
  padding:9px 14px;border-radius:999px;font-size:14.5px;color:#b8c7e4;
  transition:background .22s ease,color .22s ease;
}
.sy-nav__link:hover{background:rgba(120,170,255,.12);color:#eaf2ff}
.sy-nav__link.is-active{color:#fff;background:rgba(59,123,255,.2);box-shadow:inset 0 0 0 1px rgba(120,170,255,.34)}
.sy-nav__link:focus-visible{outline:2px solid #7cc4ff;outline-offset:2px}
.sy-lang{display:flex;align-items:center;gap:6px;margin-left:4px}
.sy-lang__pill{padding:5px 12px;border-radius:999px;font-size:12.5px;color:var(--sy-muted);cursor:default;white-space:nowrap}
.sy-lang__pill.is-current{background:linear-gradient(135deg,rgba(59,123,255,.85),rgba(34,211,238,.75));color:#fff;font-weight:600;box-shadow:0 6px 16px rgba(45,120,255,.35)}
/* buttons */
.sy-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1.2;cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,color .22s ease;
}
.sy-btn:focus-visible{outline:2px solid #7cc4ff;outline-offset:3px}
.sy-btn--primary{
  color:#fff;
  background:linear-gradient(135deg,#3b7bff,#22d3ee);
  box-shadow:var(--sy-glow);
}
.sy-btn--primary:hover{transform:translateY(-2px);box-shadow:0 14px 38px rgba(45,120,255,.5),0 0 30px rgba(34,211,238,.35);color:#fff}
.sy-btn--ghost{color:#d7e6ff;background:rgba(255,255,255,.06);border-color:var(--sy-line)}
.sy-btn--ghost:hover{background:rgba(120,170,255,.16);border-color:rgba(140,190,255,.5);transform:translateY(-2px);color:#fff}
.sy-btn--sm{padding:9px 18px;font-size:14px}
.sy-badge{
  display:inline-flex;align-items:center;gap:8px;padding:7px 15px;border-radius:999px;
  font-size:13px;color:#a9d6ff;letter-spacing:.4px;
  background:rgba(59,123,255,.16);border:1px solid rgba(120,170,255,.32);
}
.sy-badge i{color:#4fd8f0}
/* glass panel */
.sy-glass{
  background:var(--sy-panel);
  border:1px solid var(--sy-line);
  border-radius:var(--sy-radius);
  box-shadow:var(--sy-shadow);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
}
/* article hero */
.sy-article-hero{position:relative;padding:54px 0 46px;overflow:hidden}
.sy-article-hero::before{
  content:"";position:absolute;right:-180px;top:-160px;width:560px;height:560px;border-radius:50%;
  background:radial-gradient(circle,rgba(59,123,255,.3),rgba(5,10,22,0) 68%);pointer-events:none;
}
.sy-article-hero__grid{
  position:relative;display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,.65fr);
  gap:38px;align-items:start;
}
.sy-crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:#7c8fb3;margin-bottom:18px}
.sy-crumb span{color:#7c8fb3}
.sy-crumb .sep{color:#4b5c7d}
.sy-crumb strong{color:#b9cbea;font-weight:600}
.sy-article-hero h1{margin:14px 0 18px;max-width:840px}
.sy-article-hero__lead{font-size:16px;color:#adbcda;max-width:820px;margin-bottom:22px}
.sy-article-meta{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:24px}
.sy-article-meta li{
  display:inline-flex;align-items:center;gap:7px;padding:7px 13px;border-radius:999px;
  font-size:13px;color:#a9bcdf;background:rgba(255,255,255,.05);border:1px solid var(--sy-line-soft);
}
.sy-article-meta li i{color:#5ec9f5}
.sy-hero__panel{padding:22px;min-width:0}
.sy-panel__title{display:flex;align-items:center;gap:9px;font-size:15px;color:#dbe8ff;margin-bottom:8px}
.sy-panel__title i{color:#5ec9f5}
.sy-panel__row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:10px 0;border-bottom:1px dashed rgba(140,180,255,.14);font-size:14px}
.sy-panel__row:last-of-type{border-bottom:0}
.sy-panel__row span{color:var(--sy-muted)}
.sy-panel__row strong{color:#eaf2ff;font-weight:600;text-align:right;min-width:0}
.sy-panel__row strong.warn{color:var(--sy-warn)}
/* sections */
.sy-section{padding:72px 0;position:relative}
.sy-section--alt{
  background:linear-gradient(180deg,rgba(11,22,46,.72),rgba(6,12,26,.35));
  border-top:1px solid var(--sy-line-soft);border-bottom:1px solid var(--sy-line-soft);
}
.sy-eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:12px;font-size:12.5px;letter-spacing:2px;color:#6fc6ff}
.sy-section__head{max-width:820px;margin-bottom:32px}
.sy-section__head p{margin-top:10px}
/* article layout */
.sy-article-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:32px;align-items:start}
.sy-article-main{min-width:0}
.sy-article-card{padding:30px}
.sy-article__body{min-width:0;color:#a9b8d6}
.sy-article__body h2{
  font-size:22px;margin:34px 0 12px;padding-left:14px;border-left:3px solid var(--sy-primary);
  line-height:1.4;
}
.sy-article__body h2:first-child{margin-top:0}
.sy-article__body h3{font-size:18px;margin:26px 0 10px;color:#cfe0ff}
.sy-article__body p{color:#a9b8d6;margin:0 0 14px;font-size:15.5px;line-height:1.9}
.sy-article__body ul,.sy-article__body ol{padding-left:22px;margin:0 0 16px;list-style:disc}
.sy-article__body ol{list-style:decimal}
.sy-article__body li{color:#a9b8d6;margin-bottom:8px;line-height:1.85}
.sy-article__body a{color:#8fb6ff;text-decoration:underline;text-underline-offset:3px}
.sy-article__body img{max-width:100%;height:auto;border-radius:14px;margin:18px 0;border:1px solid var(--sy-line-soft)}
.sy-article__body blockquote{
  margin:20px 0;padding:15px 20px;border-left:3px solid var(--sy-cyan);
  background:rgba(34,211,238,.08);border-radius:0 12px 12px 0;color:#c5d6f5;
}
.sy-article__body table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14.5px}
.sy-article__body th,.sy-article__body td{border:1px solid var(--sy-line-soft);padding:10px 12px;text-align:left;color:#b6c6e4}
.sy-article__body th{background:rgba(59,123,255,.16);color:#eaf2ff;font-weight:600}
.sy-article__body strong{color:#e2ecff}
.sy-article__empty{padding:12px 0 4px}
.sy-article__empty h2{margin-bottom:10px}
/* sidebar */
.sy-side{display:flex;flex-direction:column;gap:18px;position:sticky;top:92px;min-width:0}
.sy-side-card{padding:20px;min-width:0}
.sy-side-card h3{font-size:15px;color:#dbe8ff;margin-bottom:12px;display:flex;align-items:center;gap:8px}
.sy-side-card h3 i{color:#5ec9f5}
.sy-side-list{display:flex;flex-direction:column;gap:10px}
.sy-side-list li{display:flex;gap:9px;font-size:14px;color:#9fb0cf;line-height:1.7}
.sy-side-list li i{color:#4fd8f0;margin-top:4px;font-size:12px}
.sy-side-links{display:flex;flex-direction:column;gap:8px}
.sy-side-links a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:10px 12px;border-radius:12px;font-size:14px;color:#c3d5f2;
  background:rgba(255,255,255,.045);border:1px solid var(--sy-line-soft);
  transition:background .22s ease,border-color .22s ease,transform .22s ease,color .22s ease;
}
.sy-side-links a:hover{background:rgba(59,123,255,.16);border-color:rgba(140,190,255,.45);transform:translateX(2px);color:#fff}
.sy-side-links a i{font-size:12px;color:#6fa8ff}
.sy-side-note{font-size:13px;color:#7e91b3;line-height:1.8;margin:0}
/* metrics */
.sy-metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.sy-metric{
  padding:22px;border-radius:var(--sy-radius);min-width:0;
  background:var(--sy-panel);border:1px solid var(--sy-line-soft);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.sy-metric:hover{transform:translateY(-4px);border-color:rgba(120,170,255,.45);box-shadow:0 18px 42px rgba(2,8,24,.5)}
.sy-metric__icon{
  width:42px;height:42px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  font-size:16px;color:#bfe4ff;margin-bottom:14px;
  background:linear-gradient(135deg,rgba(59,123,255,.32),rgba(34,211,238,.24));
  border:1px solid rgba(120,170,255,.3);
}
.sy-metric h3{font-size:16px;margin-bottom:8px}
.sy-metric p{font-size:14px;margin:0;color:#93a5c6;line-height:1.8}
.sy-metric__tag{display:inline-block;margin-top:12px;padding:4px 10px;border-radius:999px;font-size:12px;color:#8fd6ff;background:rgba(34,211,238,.12);border:1px solid rgba(34,211,238,.24)}
/* matrix */
.sy-matrix{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.sy-matrix-card{
  padding:22px;border-radius:var(--sy-radius);min-width:0;
  background:linear-gradient(160deg,rgba(255,255,255,.075),rgba(255,255,255,.03));
  border:1px solid var(--sy-line-soft);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.sy-matrix-card:hover{transform:translateY(-4px);border-color:rgba(120,170,255,.45);box-shadow:0 18px 42px rgba(2,8,24,.5)}
.sy-matrix-card h3{font-size:16px;margin-bottom:10px}
.sy-matrix-card p{font-size:14px;color:#93a5c6;margin-bottom:14px}
.sy-matrix-card a{font-size:13.5px;display:inline-flex;align-items:center;gap:6px;color:#8fd6ff}
.sy-matrix-card a:hover{color:#d8f2ff}
/* table */
.sy-table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:var(--sy-radius);border:1px solid var(--sy-line-soft);background:rgba(255,255,255,.03)}
.sy-table{width:100%;border-collapse:collapse;min-width:640px;font-size:14.5px}
.sy-table th,.sy-table td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--sy-line-soft);color:#adbfdd;vertical-align:top}
.sy-table th{background:rgba(59,123,255,.16);color:#eaf2ff;font-weight:600;white-space:nowrap}
.sy-table tr:last-child td{border-bottom:0}
.sy-table td strong{color:#e6efff}
.sy-table .pos{color:#5ee5b5}
.sy-table .neg{color:#ff8f8f}
/* timeline */
.sy-timeline{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:16px}
.sy-timeline__item{
  position:relative;padding:22px 18px;border-radius:var(--sy-radius);min-width:0;
  background:var(--sy-panel);border:1px solid var(--sy-line-soft);
  transition:border-color .25s ease,transform .25s ease;
}
.sy-timeline__item:hover{border-color:rgba(120,170,255,.45);transform:translateY(-3px)}
.sy-timeline__step{
  display:inline-flex;align-items:center;justify-content:center;
  width:30px;height:30px;border-radius:10px;font-size:13px;font-weight:700;color:#fff;
  background:linear-gradient(135deg,#3b7bff,#7c5cff);margin-bottom:12px;
}
.sy-timeline__item h3{font-size:15.5px;margin-bottom:8px}
.sy-timeline__item p{font-size:13.5px;margin:0;color:#93a5c6;line-height:1.8}
/* checklist */
.sy-split{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:26px;align-items:start}
.sy-checklist{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.sy-check{
  display:flex;gap:12px;padding:16px 18px;border-radius:var(--sy-radius-sm);min-width:0;
  background:rgba(255,255,255,.045);border:1px solid var(--sy-line-soft);
  transition:background .22s ease,border-color .22s ease;
}
.sy-check:hover{background:rgba(59,123,255,.12);border-color:rgba(120,170,255,.42)}
.sy-check i{color:#4fd8f0;font-size:15px;margin-top:3px}
.sy-check div{min-width:0}
.sy-check strong{display:block;font-size:14.5px;color:#e2ecff;margin-bottom:4px}
.sy-check span{font-size:13.5px;color:#8fa2c4;line-height:1.75}
.sy-channel{
  padding:26px;border-radius:var(--sy-radius);min-width:0;
  background:linear-gradient(160deg,rgba(59,123,255,.2),rgba(34,211,238,.1));
  border:1px solid rgba(120,170,255,.36);
}
.sy-channel h3{font-size:19px;margin-bottom:10px}
.sy-channel p{font-size:14px;color:#adc0e0}
.sy-channel .sy-health{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 18px}
.sy-channel .sy-health span{padding:5px 11px;border-radius:999px;font-size:12.5px;color:#bfe9ff;background:rgba(255,255,255,.08);border:1px solid rgba(140,190,255,.28)}
/* download */
.sy-download{
  padding:38px;border-radius:24px;min-width:0;
  background:
    radial-gradient(600px 260px at 88% -30%,rgba(34,211,238,.24),rgba(5,10,22,0) 70%),
    linear-gradient(150deg,rgba(59,123,255,.2),rgba(255,255,255,.04));
  border:1px solid rgba(120,170,255,.34);
  box-shadow:var(--sy-shadow);
}
.sy-download__grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:30px;align-items:center}
.sy-download__buttons{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.sy-dl-btn{
  display:flex;flex-direction:column;align-items:center;gap:8px;
  padding:18px 14px;border-radius:16px;text-align:center;min-width:0;
  background:rgba(255,255,255,.07);border:1px solid rgba(140,190,255,.3);
  color:#e6f1ff;font-size:14px;font-weight:600;
  transition:transform .22s ease,background .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.sy-dl-btn i{font-size:20px;color:#7fd8ff}
.sy-dl-btn small{display:block;font-size:12px;font-weight:400;color:#93a8ca}
.sy-dl-btn:hover{
  transform:translateY(-3px);color:#fff;
  background:linear-gradient(135deg,rgba(59,123,255,.55),rgba(34,211,238,.4));
  border-color:rgba(150,210,255,.65);
  box-shadow:0 16px 34px rgba(45,120,255,.35);
}
/* faq */
.sy-faq{display:flex;flex-direction:column;gap:12px;max-width:920px}
.sy-faq details{
  border-radius:var(--sy-radius-sm);background:rgba(255,255,255,.045);
  border:1px solid var(--sy-line-soft);overflow:hidden;
  transition:border-color .22s ease,background .22s ease;
}
.sy-faq details[open]{background:rgba(59,123,255,.1);border-color:rgba(120,170,255,.42)}
.sy-faq summary{
  cursor:pointer;list-style:none;padding:16px 20px;font-size:15.5px;font-weight:600;color:#e2ecff;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
}
.sy-faq summary::-webkit-details-marker{display:none}
.sy-faq summary::after{content:"\f078";font-family:"Font Awesome 6 Free";font-weight:900;font-size:12px;color:#6fa8ff;transition:transform .22s ease}
.sy-faq details[open] summary::after{transform:rotate(180deg)}
.sy-faq summary:focus-visible{outline:2px solid #7cc4ff;outline-offset:-2px}
.sy-faq__body{padding:0 20px 18px;font-size:14.5px;color:#9fb0cf;line-height:1.9}
.sy-faq__body p{margin:0 0 8px;font-size:14.5px;color:#9fb0cf}
.sy-faq__body p:last-child{margin-bottom:0}
/* cta */
.sy-cta{
  padding:40px;border-radius:24px;text-align:center;
  background:
    radial-gradient(560px 240px at 50% -40%,rgba(59,123,255,.42),rgba(5,10,22,0) 70%),
    linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.03));
  border:1px solid rgba(120,170,255,.34);
  box-shadow:var(--sy-shadow);
}
.sy-cta h2{margin-bottom:12px}
.sy-cta p{max-width:680px;margin:0 auto 22px}
.sy-cta__actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
/* footer */
.sy-footer{
  position:relative;margin-top:20px;padding:56px 0 26px;
  background:linear-gradient(180deg,rgba(8,18,38,.6),rgba(4,8,18,.95));
  border-top:1px solid var(--sy-line-soft);
}
.sy-footer__grid{display:grid;grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,1fr));gap:32px}
.sy-footer__brand{min-width:0}
.sy-footer__brand p{font-size:14px;color:#8fa1c2;line-height:1.85;margin:14px 0 0;max-width:360px}
.sy-footer__col{min-width:0}
.sy-footer__col h4{font-size:14px;color:#dbe6fb;margin-bottom:14px;letter-spacing:.5px}
.sy-footer__col ul{display:flex;flex-direction:column;gap:9px}
.sy-footer__col li{font-size:14px;color:#8fa1c2;line-height:1.7}
.sy-footer__col a{color:#8fa1c2}
.sy-footer__col a:hover{color:#d5e4ff}
.sy-footer__bottom{
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  margin-top:36px;padding-top:20px;border-top:1px solid var(--sy-line-soft);
  font-size:13px;color:#7488a8;
}
/* responsive */
@media (max-width:1024px){
  .sy-article-hero__grid{grid-template-columns:minmax(0,1fr);gap:26px}
  .sy-article-layout{grid-template-columns:minmax(0,1fr);gap:24px}
  .sy-side{position:static}
  .sy-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}
  .sy-matrix{grid-template-columns:repeat(2,minmax(0,1fr))}
  .sy-timeline{grid-template-columns:repeat(3,minmax(0,1fr))}
  .sy-split{grid-template-columns:minmax(0,1fr)}
  .sy-download__grid{grid-template-columns:minmax(0,1fr)}
  .sy-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:768px){
  .sy-header__inner{gap:10px 12px}
  .sy-brand{flex:1 1 auto}
  .sy-nav{order:3;margin-left:0;width:100%;flex-wrap:nowrap;overflow-x:auto;justify-content:flex-start;padding-bottom:4px;-webkit-overflow-scrolling:touch}
  .sy-nav__link{white-space:nowrap;flex:0 0 auto}
  .sy-lang{margin-left:auto}
  .sy-section{padding:56px 0}
  .sy-article-hero{padding:40px 0 34px}
  .sy-article-card{padding:22px}
  .sy-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}
  .sy-timeline{grid-template-columns:repeat(2,minmax(0,1fr))}
  .sy-checklist{grid-template-columns:minmax(0,1fr)}
  .sy-download{padding:26px}
  .sy-cta{padding:30px 22px}
  .sy-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px}
}
@media (max-width:520px){
  .sy-container{padding:0 16px}
  .sy-metrics,.sy-matrix{grid-template-columns:minmax(0,1fr)}
  .sy-timeline{grid-template-columns:minmax(0,1fr)}
  .sy-download__buttons{grid-template-columns:minmax(0,1fr)}
  .sy-footer__grid{grid-template-columns:minmax(0,1fr)}
  .sy-article-hero h1{font-size:23px}
  .sy-btn{padding:12px 20px;font-size:14.5px}
}