/* ============================================================
   K2Box 图吧工具箱 · 全站统一样式
   深蓝科技主题 / IconPark 线性图标 / 响应式
   ============================================================ */
:root{
  --bg:#060a13;
  --bg-2:#0a1120;
  --bg-3:#0e1730;
  --card:rgba(146,180,255,.045);
  --card-hover:rgba(146,180,255,.08);
  --line:rgba(146,180,255,.12);
  --line-strong:rgba(146,180,255,.22);
  --text:#e9effa;
  --muted:#93a3bd;
  --muted-2:#6b7a94;
  --brand:#4d7cfe;
  --cyan:#22d3ee;
  --green:#34d399;
  --amber:#fbbf24;
  --grad:linear-gradient(120deg,#4d7cfe 0%,#22d3ee 100%);
  --radius:16px;
  --shadow:0 24px 60px -24px rgba(2,8,26,.8);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{
  font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  background:var(--bg);color:var(--text);
  font-size:16px;line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
::selection{background:rgba(77,124,254,.35)}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.icon{width:1.25em;height:1.25em;vertical-align:-.25em;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* ===== 背景装饰 ===== */
.bg-fx{position:fixed;inset:0;z-index:-1;overflow:hidden;background:
  radial-gradient(900px 500px at 85% -5%,rgba(77,124,254,.14),transparent 60%),
  radial-gradient(700px 420px at -10% 30%,rgba(34,211,238,.08),transparent 60%),
  var(--bg);}
.bg-grid{position:absolute;inset:0;
  background-image:linear-gradient(rgba(146,180,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(146,180,255,.05) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:radial-gradient(ellipse 90% 60% at 50% 0%,#000 30%,transparent 75%);}

/* ===== 导航 ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;transition:.3s;border-bottom:1px solid transparent}
.nav.scrolled{background:rgba(6,10,19,.82);backdrop-filter:blur(14px);border-bottom-color:var(--line)}
.nav-in{display:flex;align-items:center;gap:32px;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:19px;letter-spacing:.3px}
.logo-mark{width:34px;height:34px;border-radius:9px;background:var(--grad);display:grid;place-items:center;box-shadow:0 6px 18px -6px rgba(77,124,254,.7);flex-shrink:0}
.logo-mark svg{width:19px;height:19px;stroke:#fff;stroke-width:2}
.logo small{font-size:11px;font-weight:500;color:var(--muted);letter-spacing:1px;display:block;line-height:1.1}
.nav-links{display:flex;gap:6px;margin-left:12px}
.nav-links a{padding:8px 14px;border-radius:8px;color:var(--muted);font-size:14.5px;transition:.2s}
.nav-links a:hover{color:var(--text);background:rgba(146,180,255,.07)}
.nav-links a.on{color:#cdd9ff;background:rgba(77,124,254,.16)}
.nav-cta{margin-left:auto;display:flex;gap:12px;align-items:center}
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 22px;border-radius:10px;font-weight:600;font-size:15px;transition:.25s;border:1px solid transparent;cursor:pointer}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 26px -10px rgba(59,110,246,.75)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 32px -10px rgba(59,110,246,.9)}
.btn-ghost{border-color:var(--line-strong);color:var(--text);background:rgba(146,180,255,.04)}
.btn-ghost:hover{background:rgba(146,180,255,.1);border-color:rgba(146,180,255,.35)}
.btn-sm{padding:8px 18px;font-size:14px}
.btn-lg{padding:15px 36px;font-size:16.5px;border-radius:12px}

/* ===== Hero(首页) ===== */
.hero{padding:158px 0 90px;position:relative}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.badge{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;border:1px solid var(--line-strong);background:rgba(77,124,254,.09);font-size:13px;color:#a9c2ff;letter-spacing:.5px}
.badge .dot{width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 10px var(--green);animation:pulse 2s infinite}
@keyframes pulse{50%{opacity:.4}}
.hero h1{font-size:52px;line-height:1.18;font-weight:800;letter-spacing:-.5px;margin:22px 0 18px}
.hero h1 .hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{color:var(--muted);font-size:17px;max-width:560px}
.hero-sub b{color:#c6d6f5;font-weight:600}
.hero-cta{display:flex;gap:14px;margin:32px 0 18px;flex-wrap:wrap}
.hero-meta{display:flex;gap:18px;flex-wrap:wrap;color:var(--muted-2);font-size:13.5px}
.hero-meta span{display:inline-flex;align-items:center;gap:6px}
.hero-meta .icon{width:15px;height:15px;color:var(--cyan)}

/* ===== 内页页头 ===== */
.page-hero{padding:158px 0 72px;position:relative}
.page-hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.page-hero h1{font-size:46px;line-height:1.2;font-weight:800;letter-spacing:-.5px;margin:22px 0 18px}
.page-hero h1 .hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.page-hero.center-h{text-align:center;padding-bottom:64px}
.page-hero.center-h .hero-sub{margin:0 auto}
.hero-img{border-radius:18px;border:1px solid var(--line-strong);box-shadow:var(--shadow),0 0 80px -30px rgba(77,124,254,.45);width:100%}
.crumb{font-size:13px;color:var(--muted-2);margin-bottom:16px;display:flex;align-items:center;gap:8px}
.crumb a{color:var(--muted);transition:.2s}
.crumb a:hover{color:var(--cyan)}

/* ===== Hero 应用窗口 mockup ===== */
.mock{position:relative}
.mock-glow{position:absolute;inset:-40px -20px;background:radial-gradient(closest-side,rgba(77,124,254,.22),transparent 70%);filter:blur(10px);z-index:0}
.window{position:relative;z-index:1;background:linear-gradient(160deg,#101a30,#0b1224 60%);border:1px solid var(--line-strong);border-radius:14px;box-shadow:var(--shadow),0 0 0 1px rgba(0,0,0,.4),0 0 80px -30px rgba(77,124,254,.5);overflow:hidden}
.win-bar{display:flex;align-items:center;gap:8px;padding:11px 14px;border-bottom:1px solid var(--line);background:rgba(6,10,19,.5)}
.win-bar i{width:11px;height:11px;border-radius:50%;background:#2b3552}
.win-bar i:nth-child(1){background:#ff5f57}.win-bar i:nth-child(2){background:#febc2e}.win-bar i:nth-child(3){background:#28c840}
.win-title{margin-left:8px;font-size:12.5px;color:var(--muted);letter-spacing:.4px}
.win-body{display:grid;grid-template-columns:150px 1fr;min-height:340px}
.win-side{border-right:1px solid var(--line);padding:14px 10px;background:rgba(6,10,19,.35)}
.win-side div{padding:8px 10px;border-radius:8px;font-size:13px;color:var(--muted);display:flex;align-items:center;gap:8px;margin-bottom:2px}
.win-side div.on{background:rgba(77,124,254,.16);color:#cdd9ff}
.win-side .icon{width:15px;height:15px}
.win-main{padding:16px}
.win-main h4{font-size:13px;color:var(--muted);font-weight:600;letter-spacing:1px;margin-bottom:12px;display:flex;align-items:center;gap:8px}
.hw-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.hw{background:rgba(146,180,255,.05);border:1px solid var(--line);border-radius:10px;padding:12px}
.hw-t{display:flex;align-items:center;gap:7px;font-size:12px;color:var(--muted-2);margin-bottom:6px}
.hw-t .icon{width:14px;height:14px;color:var(--cyan)}
.hw-n{font-size:13.5px;font-weight:600;color:#dbe6ff;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.hw-bar{height:5px;border-radius:99px;background:rgba(146,180,255,.12);margin-top:9px;overflow:hidden}
.hw-bar i{display:block;height:100%;border-radius:99px;background:var(--grad);transition:width 1.2s cubic-bezier(.6,0,.2,1)}
.hw-v{font-size:11.5px;color:var(--muted);margin-top:6px;display:flex;justify-content:space-between}
.hw-v em{font-style:normal;color:var(--green)}
.mock-tag{position:absolute;z-index:2;background:rgba(10,17,32,.92);border:1px solid var(--line-strong);border-radius:10px;padding:8px 14px;font-size:12.5px;color:#c6d6f5;box-shadow:var(--shadow);backdrop-filter:blur(8px);display:flex;align-items:center;gap:7px}
.mock-tag .icon{width:15px;height:15px;color:var(--green)}
.tag-1{top:26px;right:-18px;animation:float 5s ease-in-out infinite}
.tag-2{bottom:34px;left:-26px;animation:float 6s .8s ease-in-out infinite}
@keyframes float{50%{transform:translateY(-9px)}}

/* ===== 数据条 ===== */
.stats{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(10,17,32,.5)}
.stats-in{display:grid;grid-template-columns:repeat(4,1fr);padding:38px 0}
.stat{text-align:center;position:relative}
.stat+.stat::before{content:"";position:absolute;left:0;top:12%;height:76%;width:1px;background:var(--line)}
.stat b{font-size:38px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{display:block;color:var(--muted);font-size:14px;margin-top:2px}

/* ===== 工具墙 ===== */
.tools-wall{padding:26px 0;border-bottom:1px solid var(--line);overflow:hidden;position:relative}
.tools-wall::before,.tools-wall::after{content:"";position:absolute;top:0;bottom:0;width:120px;z-index:2;pointer-events:none}
.tools-wall::before{left:0;background:linear-gradient(90deg,var(--bg),transparent)}
.tools-wall::after{right:0;background:linear-gradient(-90deg,var(--bg),transparent)}
.marquee{display:flex;gap:14px;width:max-content;animation:scroll 34s linear infinite}
.marquee span{display:inline-flex;align-items:center;gap:8px;padding:9px 20px;border:1px solid var(--line);border-radius:999px;background:var(--card);color:var(--muted);font-size:14px;white-space:nowrap}
.marquee .icon{width:15px;height:15px;color:var(--brand)}
@keyframes scroll{to{transform:translateX(-50%)}}

/* ===== 通用 section ===== */
section{padding:96px 0}
.sec-tag{display:inline-flex;align-items:center;gap:7px;font-size:13px;color:var(--cyan);letter-spacing:2px;font-weight:600;text-transform:uppercase}
.sec-tag::before{content:"";width:22px;height:1.5px;background:var(--grad)}
.sec-title{font-size:38px;font-weight:800;letter-spacing:-.5px;margin:14px 0 12px;line-height:1.25}
.sec-desc{color:var(--muted);max-width:640px;font-size:16.5px}
.sec-head{margin-bottom:52px}
.center{text-align:center}
.center .sec-desc{margin:0 auto}
.center .sec-tag::after{content:"";width:22px;height:1.5px;background:var(--grad)}

/* ===== 卡片通用 ===== */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:.3s;position:relative;overflow:hidden}
.card::before{content:"";position:absolute;inset:0 0 auto;height:1px;background:linear-gradient(90deg,transparent,rgba(146,180,255,.4),transparent);opacity:0;transition:.3s}
.card:hover{transform:translateY(-4px);background:var(--card-hover);border-color:var(--line-strong);box-shadow:0 20px 44px -22px rgba(2,8,26,.9)}
.card:hover::before{opacity:1}
.card-ic{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;background:rgba(77,124,254,.13);border:1px solid rgba(77,124,254,.3);margin-bottom:18px}
.card-ic .icon{width:22px;height:22px;color:#8fb0ff}
.card h3{font-size:18.5px;font-weight:700;margin-bottom:8px}
.card p{color:var(--muted);font-size:14.5px}
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}

/* ===== 功能展示(图文) ===== */
.feat-sec{background:linear-gradient(180deg,transparent,rgba(10,17,32,.7) 18%,rgba(10,17,32,.7) 82%,transparent)}
.feat-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.feat-list{display:flex;flex-direction:column;gap:8px;margin-top:28px}
.feat-item{display:flex;gap:16px;padding:16px 18px;border-radius:12px;border:1px solid transparent;transition:.25s;cursor:default}
.feat-item:hover{background:var(--card);border-color:var(--line)}
.feat-item .card-ic{width:40px;height:40px;margin:0;flex-shrink:0;border-radius:10px}
.feat-item .card-ic .icon{width:19px;height:19px}
.feat-item h4{font-size:16px;font-weight:700}
.feat-item p{color:var(--muted);font-size:14px;margin-top:2px}

/* ===== 功能介绍页 · 交替区块 ===== */
.feat-block{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;margin-bottom:96px}
.feat-block:last-child{margin-bottom:0}
.feat-block.rev .feat-text{order:2}
.feat-text h2{font-size:32px;font-weight:800;letter-spacing:-.5px;margin:14px 0 12px;line-height:1.3}
.feat-text>p{color:var(--muted);font-size:15.5px;margin-bottom:22px}
.check-list{list-style:none;display:flex;flex-direction:column;gap:12px}
.check-list li{display:flex;gap:10px;color:#c2cfe6;font-size:14.5px;align-items:flex-start}
.check-list .icon{width:18px;height:18px;color:var(--green);flex-shrink:0;margin-top:3px}
.feat-visual{position:relative}
.feat-visual .hero-img{border-radius:16px}

/* ===== 检测面板 mockup ===== */
.panel{background:linear-gradient(165deg,#101a30,#0b1224 65%);border:1px solid var(--line-strong);border-radius:14px;box-shadow:var(--shadow);padding:22px;position:relative;overflow:hidden}
.panel::after{content:"";position:absolute;top:-60%;right:-30%;width:70%;height:120%;background:radial-gradient(closest-side,rgba(34,211,238,.12),transparent);pointer-events:none}
.panel-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}
.panel-head b{font-size:14.5px;letter-spacing:.5px}
.panel-head span{font-size:12px;color:var(--green);display:flex;align-items:center;gap:6px}
.panel-head span::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 8px var(--green);animation:pulse 2s infinite}
.gauge-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:14px}
.gauge{background:rgba(6,10,19,.55);border:1px solid var(--line);border-radius:12px;padding:14px;text-align:center}
.gauge b{font-size:24px;font-weight:800;color:#dbe6ff}
.gauge b small{font-size:12px;color:var(--muted);font-weight:500;margin-left:2px}
.gauge span{display:block;font-size:12px;color:var(--muted-2);margin-top:2px}
.bars{display:flex;flex-direction:column;gap:12px}
.bar-row{display:grid;grid-template-columns:86px 1fr 52px;align-items:center;gap:12px;font-size:12.5px;color:var(--muted)}
.bar-track{height:6px;border-radius:99px;background:rgba(146,180,255,.1);overflow:hidden}
.bar-track i{display:block;height:100%;border-radius:99px;background:var(--grad);transition:width 1.4s cubic-bezier(.6,0,.2,1)}
.bar-row em{font-style:normal;color:#c6d6f5;text-align:right}

/* ===== 集成工具(首页分类卡) ===== */
.tool-cats{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.tool-cat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.3s}
.tool-cat:hover{border-color:var(--line-strong);transform:translateY(-4px);background:var(--card-hover)}
.tool-cat h3{display:flex;align-items:center;gap:10px;font-size:17px;margin-bottom:16px}
.tool-cat h3 .icon{width:20px;height:20px;color:var(--cyan)}
.tool-cat ul{list-style:none;display:flex;flex-direction:column;gap:9px}
.tool-cat li{display:flex;align-items:center;gap:9px;color:var(--muted);font-size:14.5px}
.tool-cat li::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--brand);flex-shrink:0}
.tool-cat li b{color:#c6d6f5;font-weight:600}

/* ===== 工具列表页 ===== */
.cat-block{margin-bottom:64px}
.cat-head{display:flex;align-items:center;gap:14px;margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.cat-head .card-ic{margin:0;width:44px;height:44px}
.cat-head h2{font-size:24px;font-weight:800}
.cat-head p{color:var(--muted);font-size:13.5px;margin-top:2px}
.count-badge{margin-left:auto;font-size:13px;color:#a9c2ff;background:rgba(77,124,254,.12);border:1px solid rgba(77,124,254,.3);padding:4px 14px;border-radius:99px;white-space:nowrap}
.tool-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.tool-card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;transition:.28s;display:flex;flex-direction:column;gap:8px}
.tool-card:hover{transform:translateY(-4px);background:var(--card-hover);border-color:rgba(77,124,254,.4);box-shadow:0 16px 36px -18px rgba(2,8,26,.9)}
.tool-card .t-ic{width:40px;height:40px;border-radius:10px;display:grid;place-items:center;background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.28)}
.tool-card .t-ic .icon{width:20px;height:20px;color:var(--cyan)}
.tool-card b{font-size:15.5px;color:#dbe6ff}
.tool-card p{color:var(--muted);font-size:13px;line-height:1.6}
.tool-card .t-tag{font-size:11.5px;color:#a9c2ff;background:rgba(77,124,254,.12);border:1px solid rgba(77,124,254,.26);padding:2px 9px;border-radius:99px;align-self:flex-start}

/* ===== 使用场景 ===== */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.scene{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.3s}
.scene:hover{border-color:var(--line-strong);transform:translateY(-4px);background:var(--card-hover)}
.scene .card-ic{margin-bottom:16px}
.scene h3{font-size:17.5px;margin-bottom:8px}
.scene p{color:var(--muted);font-size:14px;margin-bottom:14px}
.chips{display:flex;flex-wrap:wrap;gap:7px}
.chips i{font-style:normal;font-size:12px;color:#a9c2ff;background:rgba(77,124,254,.12);border:1px solid rgba(77,124,254,.28);padding:3px 10px;border-radius:99px}

/* ===== 用户评价 ===== */
.review-sec{background:linear-gradient(180deg,transparent,rgba(10,17,32,.7) 18%,rgba(10,17,32,.7) 82%,transparent)}
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.review{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.3s;display:flex;flex-direction:column;gap:14px}
.review:hover{border-color:var(--line-strong);transform:translateY(-4px);background:var(--card-hover)}
.stars{display:flex;gap:3px}
.stars svg{width:15px;height:15px;fill:var(--amber);stroke:none}
.review p{color:#c2cfe6;font-size:14.5px;flex:1}
.reviewer{display:flex;align-items:center;gap:12px}
.avatar{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;font-weight:700;font-size:15px;color:#fff;flex-shrink:0}
.reviewer b{font-size:14.5px;display:block}
.reviewer span{font-size:12.5px;color:var(--muted-2)}

/* ===== 下载(首页 CTA) ===== */
.dl-box{background:linear-gradient(150deg,rgba(77,124,254,.14),rgba(34,211,238,.06) 55%,rgba(10,17,32,.4));border:1px solid rgba(77,124,254,.35);border-radius:22px;padding:60px 40px;text-align:center;position:relative;overflow:hidden}
.dl-box::before{content:"";position:absolute;top:-140px;left:50%;transform:translateX(-50%);width:520px;height:280px;background:radial-gradient(closest-side,rgba(77,124,254,.32),transparent);filter:blur(8px);pointer-events:none}
.dl-box h2{font-size:34px;font-weight:800;margin-bottom:12px;position:relative}
.dl-box>p{color:var(--muted);max-width:560px;margin:0 auto 30px;position:relative}
.dl-meta{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;margin-bottom:30px;position:relative}
.dl-meta span{font-size:13px;color:#c6d6f5;background:rgba(6,10,19,.55);border:1px solid var(--line-strong);padding:6px 14px;border-radius:99px;display:inline-flex;align-items:center;gap:6px}
.dl-meta .icon{width:14px;height:14px;color:var(--cyan)}
.dl-btns{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;position:relative}
.dl-note{margin-top:20px;font-size:13px;color:var(--muted-2);position:relative}

/* ===== 工具列表页 · 分类筛选 ===== */
.tool-tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:44px;padding:16px;background:var(--card);border:1px solid var(--line);border-radius:14px;position:sticky;top:80px;z-index:50;backdrop-filter:blur(12px)}
.tool-tab{padding:9px 20px;border-radius:99px;border:1px solid transparent;background:transparent;color:var(--muted);font-size:14px;font-weight:600;cursor:pointer;font-family:inherit;transition:.22s;white-space:nowrap}
.tool-tab:hover{color:var(--text);background:rgba(146,180,255,.08)}
.tool-tab.on{background:var(--grad);color:#fff;box-shadow:0 6px 18px -8px rgba(59,110,246,.8)}
.cat-block.cat-hide{position:absolute!important;visibility:hidden!important;height:0!important;overflow:hidden!important;margin:0!important;pointer-events:none!important}

/* ===== 工具卡片 · 可点击 ===== */
a.tool-card{text-decoration:none;color:inherit;position:relative}
.tool-card .t-more{display:inline-flex;align-items:center;gap:4px;font-size:12px;color:var(--muted-2);margin-top:auto;transition:.22s}
.tool-card .t-more .icon{width:13px;height:13px}
.tool-card:hover .t-more{color:var(--cyan);gap:7px}

/* ===== 网盘下载清单 ===== */
.pan-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.pan-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px 18px;text-align:center;transition:.28s;display:flex;flex-direction:column;align-items:center;gap:0;position:relative;overflow:hidden}
.pan-card::before{content:"";position:absolute;inset:0 0 auto;height:1px;background:linear-gradient(90deg,transparent,rgba(146,180,255,.45),transparent);opacity:0;transition:.3s}
.pan-card:hover{transform:translateY(-4px);border-color:rgba(77,124,254,.45);background:var(--card-hover);box-shadow:0 18px 40px -20px rgba(2,8,26,.9)}
.pan-card:hover::before{opacity:1}
.pan-logo{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;margin-bottom:14px;color:#fff;box-shadow:0 10px 22px -10px rgba(0,0,0,.6)}
.pan-logo svg{width:26px;height:26px}
.pan-card h3{font-size:15.5px;margin-bottom:4px}
.pan-card p{color:var(--muted-2);font-size:12px;margin-bottom:14px;line-height:1.6}
.pan-card .pan-btn{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:#a9c2ff;background:rgba(77,124,254,.12);border:1px solid rgba(77,124,254,.3);padding:7px 16px;border-radius:99px;transition:.22s;margin-top:auto}
.pan-card .pan-btn .icon{width:14px;height:14px}
.pan-card:hover .pan-btn{background:var(--grad);color:#fff;border-color:transparent}

/* ===== 下载中心页 ===== */
.dl-main{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch}
.dl-card{background:var(--card);border:1px solid var(--line-strong);border-radius:20px;padding:36px;position:relative;overflow:hidden}
.dl-card.primary{background:linear-gradient(150deg,rgba(77,124,254,.16),rgba(34,211,238,.05) 60%,rgba(10,17,32,.4));border-color:rgba(77,124,254,.4)}
.dl-card h3{font-size:22px;font-weight:800;margin-bottom:6px;display:flex;align-items:center;gap:10px}
.dl-card .rec{font-size:11.5px;color:#04122b;background:var(--grad);padding:3px 10px;border-radius:99px;font-weight:700}
.dl-card .ver{font-size:13.5px;color:var(--cyan);margin:4px 0 14px;font-weight:600}
.dl-card>p{color:var(--muted);font-size:14.5px;margin-bottom:22px}
.ver-table{display:flex;flex-direction:column;gap:0;margin-bottom:26px;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.ver-table div{display:flex;justify-content:space-between;padding:11px 16px;font-size:13.5px;background:rgba(6,10,19,.35)}
.ver-table div:nth-child(even){background:rgba(146,180,255,.04)}
.ver-table span{color:var(--muted-2)}
.ver-table b{color:#c6d6f5;font-weight:600}
.dl-side{display:flex;flex-direction:column;gap:24px}
.promise{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:28px}
.promise h4{font-size:16.5px;font-weight:700;margin-bottom:14px;display:flex;align-items:center;gap:9px}
.promise h4 .icon{color:var(--green);width:19px;height:19px}
.promise ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.promise li{display:flex;gap:9px;color:var(--muted);font-size:13.5px;align-items:flex-start}
.promise li .icon{width:15px;height:15px;color:var(--green);flex-shrink:0;margin-top:4px}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.step{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;transition:.3s;position:relative}
.step:hover{transform:translateY(-4px);border-color:var(--line-strong);background:var(--card-hover)}
.step-num{width:42px;height:42px;border-radius:50%;background:var(--grad);color:#fff;font-weight:800;font-size:18px;display:grid;place-items:center;margin-bottom:16px;box-shadow:0 8px 20px -8px rgba(59,110,246,.8)}
.step h3{font-size:17px;margin-bottom:6px}
.step p{color:var(--muted);font-size:14px}
.changelog{display:flex;flex-direction:column;gap:0;position:relative;padding-left:28px}
.changelog::before{content:"";position:absolute;left:8px;top:10px;bottom:10px;width:2px;background:linear-gradient(180deg,var(--brand),rgba(77,124,254,.08))}
.log-item{position:relative;padding:0 0 34px}
.log-item:last-child{padding-bottom:0}
.log-item::before{content:"";position:absolute;left:-26px;top:7px;width:12px;height:12px;border-radius:50%;background:var(--bg-2);border:3px solid var(--brand);box-shadow:0 0 12px rgba(77,124,254,.6)}
.log-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:8px}
.log-ver{font-size:17px;font-weight:800;color:#dbe6ff}
.log-date{font-size:12.5px;color:var(--muted-2);border:1px solid var(--line);padding:2px 10px;border-radius:99px}
.log-tag{font-size:11.5px;color:#04122b;background:var(--grad);padding:2px 10px;border-radius:99px;font-weight:700}
.log-item ul{list-style:none;display:flex;flex-direction:column;gap:6px}
.log-item li{color:var(--muted);font-size:14px;display:flex;gap:9px;align-items:flex-start}
.log-item li::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--cyan);flex-shrink:0;margin-top:9px}

/* ===== FAQ ===== */
.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq{background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:.3s}
.faq.open{border-color:rgba(77,124,254,.4);background:rgba(77,124,254,.06)}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:20px 24px;background:none;border:none;color:var(--text);font-size:16px;font-weight:600;text-align:left;cursor:pointer;font-family:inherit}
.faq-q .icon{width:18px;height:18px;color:var(--muted);transition:.3s;flex-shrink:0}
.faq.open .faq-q .icon{transform:rotate(180deg);color:var(--cyan)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 24px 22px;color:var(--muted);font-size:14.5px}

/* ===== 关于我们页 ===== */
.story-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.story-grid .hero-img{border-radius:16px}
.story-text h2{font-size:32px;font-weight:800;letter-spacing:-.5px;margin:14px 0 16px;line-height:1.3}
.story-text p{color:var(--muted);font-size:15.5px;margin-bottom:14px}
.story-text p b{color:#c6d6f5}
.value-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.value-card{text-align:center;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:34px 22px;transition:.3s}
.value-card:hover{transform:translateY(-4px);border-color:rgba(77,124,254,.4);background:var(--card-hover)}
.value-card .card-ic{margin:0 auto 16px}
.value-card h3{font-size:17px;margin-bottom:8px}
.value-card p{color:var(--muted);font-size:13.5px}
.sdk-box{background:linear-gradient(150deg,rgba(77,124,254,.13),rgba(34,211,238,.05) 55%,rgba(10,17,32,.4));border:1px solid rgba(77,124,254,.35);border-radius:20px;padding:44px;display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:center}
.sdk-box h2{font-size:28px;font-weight:800;margin:12px 0 12px}
.sdk-box p{color:var(--muted);font-size:15px;margin-bottom:20px}
.code-win{background:#080d1a;border:1px solid var(--line-strong);border-radius:12px;overflow:hidden;font-family:Consolas,Monaco,monospace;font-size:13px}
.code-win .cw-bar{padding:9px 14px;border-bottom:1px solid var(--line);color:var(--muted-2);font-size:12px;display:flex;gap:8px;align-items:center}
.code-win pre{padding:18px;line-height:1.75;color:#a9c2ff;overflow-x:auto}
.code-win .k{color:#22d3ee}.code-win .s{color:#fbbf24}.code-win .c{color:#5b6b8c}.code-win .f{color:#7ea6ff}
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.contact-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:30px;text-align:center;transition:.3s}
.contact-card:hover{transform:translateY(-4px);border-color:rgba(77,124,254,.4);background:var(--card-hover)}
.contact-card .card-ic{margin:0 auto 16px}
.contact-card h3{font-size:16.5px;margin-bottom:6px}
.contact-card p{color:var(--muted);font-size:13.5px;margin-bottom:12px}
.contact-card b{color:var(--cyan);font-size:16px;letter-spacing:.5px}

/* ===== SEO 文本块 ===== */
.seo-block{border-top:1px solid var(--line);padding:44px 0;color:var(--muted-2);font-size:13.5px;line-height:1.9}
.seo-block h2{font-size:16px;color:var(--muted);margin-bottom:10px;font-weight:600}
.seo-block p{margin-bottom:8px}

/* ===== 页脚 ===== */
footer{border-top:1px solid var(--line);background:rgba(6,10,19,.7);padding:64px 0 32px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;margin-bottom:44px}
.foot-brand p{color:var(--muted);font-size:13.5px;margin-top:14px;max-width:320px}
.foot-col h4{font-size:14.5px;font-weight:700;margin-bottom:16px;color:#c6d6f5}
.foot-col a{display:block;color:var(--muted);font-size:13.5px;padding:5px 0;transition:.2s}
.foot-col a:hover{color:var(--cyan)}
.foot-bottom{border-top:1px solid var(--line);padding-top:24px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:var(--muted-2);font-size:13px}

/* ===== 动效 ===== */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}
.d1{transition-delay:.08s}.d2{transition-delay:.16s}.d3{transition-delay:.24s}.d4{transition-delay:.32s}.d5{transition-delay:.4s}.d6{transition-delay:.48s}

/* ===== 响应式 ===== */
@media(max-width:1024px){
  .hero-grid,.page-hero-grid,.feat-grid,.story-grid,.sdk-box{grid-template-columns:1fr;gap:44px}
  .feat-block{grid-template-columns:1fr;gap:36px;margin-bottom:72px}
  .feat-block.rev .feat-text{order:0}
  .hero,.page-hero{padding-top:130px}
  .adv-grid,.tool-cats,.scene-grid,.review-grid,.value-grid,.contact-grid{grid-template-columns:repeat(2,1fr)}
  .tool-grid{grid-template-columns:repeat(3,1fr)}
  .pan-grid{grid-template-columns:repeat(3,1fr)}
  .dl-main{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
  .nav-links{display:none}
}
@media(max-width:640px){
  .hero h1{font-size:36px}
  .page-hero h1{font-size:32px}
  .sec-title{font-size:28px}
  .feat-text h2,.story-text h2{font-size:26px}
  .adv-grid,.tool-cats,.scene-grid,.review-grid,.stats-in,.gauge-row,.steps,.value-grid,.contact-grid{grid-template-columns:1fr}
  .tool-grid{grid-template-columns:repeat(2,1fr)}
  .pan-grid{grid-template-columns:repeat(2,1fr)}
  .stats-in{gap:24px}
  .stat+.stat::before{display:none}
  section{padding:64px 0}
  .dl-box{padding:44px 22px}
  .sdk-box{padding:28px}
  .foot-grid{grid-template-columns:1fr}
  .mock-tag{display:none}
  .win-body{grid-template-columns:1fr}
  .win-side{display:none}
}

/* 友情链接 */
.flinks{background:#04070d;border-top:1px solid rgba(255,255,255,.06);padding:16px 0}
.flinks-in{display:flex;flex-wrap:wrap;align-items:center;gap:6px 18px;font-size:13px}
.flinks-t{color:#8b95a7}
.flinks a{color:#8b95a7;text-decoration:none;transition:color .2s}
.flinks a:hover{color:#22d3ee}