/* ===== LookImage2 官网样式 · 现代扁平 · 蓝色主题 ===== */
:root{
  --blue:#3FA9FF;          /* 程序品牌主色 */
  --blue-deep:#0066FF;
  --blue-soft:#E8F4FF;
  --ink:#1b2733;
  --ink-2:#54657a;
  --line:#e6edf3;
  --bg:#ffffff;
  --bg-alt:#f5f9fd;
  --radius:16px;
  --shadow:0 10px 30px rgba(20,60,110,.08);
  --shadow-hover:0 16px 40px rgba(20,90,180,.16);
  --maxw:1120px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,-apple-system,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:12px 24px;border-radius:999px;font-weight:600;font-size:15px;
  transition:transform .15s ease,box-shadow .2s ease,background .2s ease;
  cursor:pointer;
}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 20px rgba(63,169,255,.35)}
.btn-primary:hover{background:var(--blue-deep);transform:translateY(-2px);box-shadow:0 12px 26px rgba(0,102,255,.4)}
.btn-ghost{background:#fff;color:var(--blue-deep);border:1.5px solid var(--line)}
.btn-ghost:hover{border-color:var(--blue);transform:translateY(-2px)}

/* ===== 导航 ===== */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.82);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  max-width:var(--maxw);margin:0 auto;padding:14px 24px;
  display:flex;align-items:center;gap:24px;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:.3px}
.brand-mark{
  width:34px;height:34px;display:block;object-fit:contain;
}
.brand-2{color:var(--blue)}
.nav-links{display:flex;gap:26px;margin-left:auto;font-size:15px;color:var(--ink-2);font-weight:500}
.nav-links a:hover{color:var(--blue-deep)}
.nav-cta{padding:9px 20px;font-size:14px}

/* ===== HERO ===== */
.hero{position:relative;overflow:hidden;padding:72px 0 84px}
.hero-bg{
  position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(60% 60% at 80% 10%,rgba(63,169,255,.16),transparent 60%),
    radial-gradient(50% 50% at 10% 90%,rgba(0,102,255,.10),transparent 60%),
    linear-gradient(180deg,#f7fbff,var(--bg));
}
.hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.badge{
  display:inline-block;padding:6px 14px;border-radius:999px;
  background:var(--blue-soft);color:var(--blue-deep);font-size:13px;font-weight:600;margin-bottom:18px;
}
.hero h1{font-size:clamp(34px,5vw,56px);line-height:1.15;font-weight:800;letter-spacing:-.5px}
.grad{background:linear-gradient(120deg,var(--blue),var(--blue-deep));-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{margin:20px 0 30px;font-size:17px;color:var(--ink-2);max-width:520px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{list-style:none;display:flex;gap:34px;margin-top:38px}
.hero-stats li{display:flex;flex-direction:column}
.hero-stats strong{font-size:28px;font-weight:800;color:var(--blue-deep)}
.hero-stats span{font-size:13px;color:var(--ink-2)}

/* HERO 装饰窗口 */
.hero-card{display:grid;place-items:center}
.win{width:100%;max-width:380px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);overflow:hidden}
.win-bar{display:flex;gap:7px;padding:12px 14px;background:#f3f7fb;border-bottom:1px solid var(--line)}
.win-bar i{width:11px;height:11px;border-radius:50%;background:#d4dde6}
.win-bar i:first-child{background:#ff5f57}
.win-body{padding:18px;display:flex;flex-direction:column;gap:12px}
.ph{border-radius:10px;background:linear-gradient(135deg,#eaf4ff,#d6ebff)}
.ph-1{height:120px}
.ph-2{height:54px;width:70%}
.ph-3{height:30px;width:45%;background:linear-gradient(135deg,var(--blue),var(--blue-deep))}
.win-foot{display:flex;justify-content:space-between;padding:12px 16px;border-top:1px solid var(--line)}
.win-foot span{height:8px;width:60px;border-radius:4px;background:#eef3f8}
.win-foot span:last-child{width:34px;background:var(--blue)}

/* ===== 区块通用 ===== */
.section{padding:80px 0}
.section-alt{background:var(--bg-alt)}
.section-head{text-align:center;max-width:640px;margin:0 auto 48px}
.section-head h2{font-size:clamp(26px,3.4vw,38px);font-weight:800;letter-spacing:-.3px}
.section-head p{margin-top:12px;color:var(--ink-2);font-size:16px}

/* ===== 网格 ===== */
.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}

/* ===== 特性卡片 ===== */
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 26px;box-shadow:var(--shadow);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:var(--blue)}
.card h3{font-size:19px;margin:14px 0 8px;font-weight:700}
.card p{color:var(--ink-2);font-size:15px}
.ico{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;font-size:24px;color:#fff}
.ico-blue{background:linear-gradient(135deg,#3FA9FF,#0066FF)}
.ico-green{background:linear-gradient(135deg,#34d399,#059669)}
.ico-cyan{background:linear-gradient(135deg,#22d3ee,#0891b2)}
.ico-indigo{background:linear-gradient(135deg,#818cf8,#4f46e5)}
.ico-purple{background:linear-gradient(135deg,#c084fc,#9333ea)}
.ico-orange{background:linear-gradient(135deg,#fbbf24,#f59e0b)}

/* ===== 轻量特性 ===== */
.feat{
  background:#fff;border:1px solid var(--line);border-left:4px solid var(--blue);
  border-radius:12px;padding:24px 26px;box-shadow:var(--shadow);
}
.feat h3{font-size:18px;margin-bottom:8px}
.feat p{color:var(--ink-2);font-size:15px}

/* ===== 格式 chips ===== */
.chips{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;max-width:820px;margin:0 auto}
.chip{
  padding:9px 18px;border-radius:999px;background:#fff;border:1px solid var(--line);
  font-size:14px;font-weight:600;color:var(--ink-2);transition:.2s;
}
.chip:hover{background:var(--blue-soft);color:var(--blue-deep);border-color:var(--blue);transform:translateY(-2px)}

/* ===== 下载卡片 ===== */
.dl-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 26px;box-shadow:var(--shadow);text-align:center;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.dl-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:var(--blue)}
.dl-ico{font-size:38px;margin-bottom:10px;text-align:center}
.dl-ico .dl-logo{height:38px;width:38px;object-fit:contain;display:inline-block;vertical-align:middle}
.dl-card h3{font-size:18px;margin-bottom:6px}
.dl-card p{color:var(--ink-2);font-size:14px;margin-bottom:14px}
.dl-link{display:inline-block;font-size:13px;color:var(--blue-deep);font-weight:600;word-break:break-all}
.dl-sub{
  display:block;margin-top:12px;padding:12px 16px;border-radius:12px;
  background:linear-gradient(135deg,var(--blue),var(--blue-deep));color:#fff;
  font-size:14px;font-weight:600;text-align:center;
  box-shadow:0 6px 16px rgba(63,169,255,.32);
  transition:transform .15s ease,box-shadow .2s ease;
}
.dl-sub:hover{transform:translateY(-2px);box-shadow:0 10px 22px rgba(0,102,255,.4)}
.dl-pwd{
  display:block;margin-top:8px;margin-bottom:14px;font-size:13px;
  color:var(--ink-2);user-select:text;
}
.dl-pwd::before{content:"🔑 ";}
.dl-note{text-align:center;margin-top:32px;color:var(--ink-2);font-size:14px}
.dl-note code{background:var(--blue-soft);color:var(--blue-deep);padding:2px 8px;border-radius:6px;font-size:13px}

/* ===== 社区 ===== */
.comm{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:34px 30px;box-shadow:var(--shadow);text-align:center;
}
.comm-ico{font-size:40px;margin-bottom:12px}
.comm h3{font-size:20px;margin-bottom:8px}
.comm p{color:var(--ink-2);font-size:15px;margin-bottom:20px}
.comm-links{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* ===== 页脚 ===== */
.footer{background:#0f1b2d;color:#cdd9e6;padding:40px 0}
.footer-inner{display:flex;flex-direction:column;align-items:center;gap:14px;text-align:center}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:#fff}
.footer-meta{font-size:13px;color:#8aa0b8}
.footer-links{display:flex;gap:22px;font-size:14px}
.footer-links a{color:#9fb4c9}
.footer-links a:hover{color:var(--blue)}

/* ===== 响应式 ===== */
@media (max-width:900px){
  .hero-inner{grid-template-columns:1fr;gap:36px}
  .hero-card{order:-1}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .nav-links{display:none}
}
@media (max-width:600px){
  .section{padding:56px 0}
  .grid-2,.grid-3{grid-template-columns:1fr}
  .hero-stats{gap:22px}
  .nav-cta{margin-left:auto}
}