*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}

:root{
  --blue:#0071e3;
  --blue-hover:#0077ed;
  --text:#1d1d1f;
  --text2:#86868b;
  --bg:#fff;
  --bg2:#f5f5f7;
  --border:#d2d2d7;
  --green:#34c759;
  --orange:#ff9f0a;
  --red:#ff3b30;
  --radius:16px;
  --shadow:0 2px 12px rgba(0,0,0,.08);
}

html{scroll-behavior:smooth}

body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

.container{max-width:1120px;margin:0 auto;padding:0 24px}

/* ---------- NAV ---------- */
.navbar{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(255,255,255,.72);
  backdrop-filter:saturate(180%) blur(20px);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid rgba(0,0,0,.08);
  transition:box-shadow .3s;
}
.navbar.scrolled{box-shadow:0 2px 20px rgba(0,0,0,.08)}
.nav-container{max-width:1120px;margin:0 auto;padding:0 24px;height:52px;display:flex;align-items:center;justify-content:space-between}
.nav-logo{font-size:17px;font-weight:600;color:var(--text);text-decoration:none;letter-spacing:-.02em}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{font-size:14px;color:var(--text);text-decoration:none;transition:color .2s}
.nav-links a:hover{color:var(--blue)}
.nav-download{background:var(--blue)!important;color:#fff!important;padding:7px 16px;border-radius:20px;font-weight:500!important}
.nav-download:hover{background:var(--blue-hover)!important}

/* ---------- HERO ---------- */
.hero{
  min-height:100vh;display:flex;align-items:center;justify-content:center;
  padding:120px 24px 80px;text-align:center;
  background:linear-gradient(180deg,var(--bg2) 0%,var(--bg) 100%);
  position:relative;overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(ellipse 70% 50% at 50% 20%,rgba(0,113,227,.07) 0%,transparent 60%);
  pointer-events:none;
}
.hero-content{position:relative;max-width:860px;animation:fadeUp .8s ease-out both}
.hero-title{font-size:clamp(44px,10vw,88px);font-weight:700;line-height:1.05;letter-spacing:-.03em;margin-bottom:20px}
.title-main{display:block;background:linear-gradient(135deg,#1d1d1f,#515154);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.title-domain{display:block;font-size:.48em;font-weight:500;color:var(--blue);-webkit-text-fill-color:var(--blue);margin-top:6px}
.hero-subtitle{font-size:clamp(18px,4vw,26px);font-weight:500;margin-bottom:14px;letter-spacing:-.01em}
.hero-description{font-size:16px;color:var(--text2);max-width:540px;margin:0 auto 36px;line-height:1.7}
.hero-buttons{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ---------- BUTTONS ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;font-size:16px;font-weight:500;
  text-decoration:none;border-radius:12px;border:none;cursor:pointer;
  transition:background .25s,transform .25s,box-shadow .25s;
}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 4px 14px rgba(0,113,227,.35)}
.btn-primary:hover{background:var(--blue-hover);transform:translateY(-2px);box-shadow:0 6px 20px rgba(0,113,227,.45)}
.btn-secondary{background:rgba(0,0,0,.06);color:var(--text)}
.btn-secondary:hover{background:rgba(0,0,0,.1)}
.btn-download{background:var(--text);color:#fff;padding:14px 36px}
.btn-download:hover{background:#333;transform:translateY(-2px)}

/* ---------- SECTIONS ---------- */
.section-title{font-size:clamp(28px,5vw,48px);font-weight:700;text-align:center;letter-spacing:-.02em;margin-bottom:10px}
.section-subtitle{font-size:18px;color:var(--text2);text-align:center;margin-bottom:56px}

/* ---------- FEATURES ---------- */
.features{padding:100px 0;background:var(--bg)}
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feature-card{
  background:var(--bg2);border-radius:var(--radius);padding:28px;
  transition:transform .3s,box-shadow .3s;
}
.feature-card:hover{transform:translateY(-4px);box-shadow:0 8px 30px rgba(0,0,0,.1)}
.feature-card--highlight{
  background:linear-gradient(135deg,rgba(0,113,227,.07),rgba(0,113,227,.03));
  border:1px solid rgba(0,113,227,.12);
}
.feature-card--highlight:hover{border-color:rgba(0,113,227,.25)}
.feature-icon{width:44px;height:44px;margin-bottom:16px}
.feature-icon svg{width:100%;height:100%;stroke:var(--blue)}
.feature-card h3{font-size:18px;font-weight:600;margin-bottom:6px}
.feature-card p{font-size:14px;color:var(--text2);line-height:1.6}

/* ---------- COMPARISON ---------- */
.comparison{padding:100px 0;background:var(--bg2)}
.table-wrap{
  overflow-x:auto;border-radius:var(--radius);
  background:var(--bg);box-shadow:var(--shadow);margin-bottom:36px;
}
table{width:100%;border-collapse:collapse;min-width:560px}
th,td{padding:18px 22px;text-align:left;border-bottom:1px solid var(--border);font-size:14px}
th{font-weight:600;color:var(--text2);text-transform:uppercase;letter-spacing:.04em;background:var(--bg2)}
th:first-child{border-radius:var(--radius) 0 0 0}
th:last-child{border-radius:0 var(--radius) 0 0}
tr:last-child td{border-bottom:none}
.col-promax{background:rgba(0,113,227,.04)}
th.col-promax{color:var(--blue);background:rgba(0,113,227,.08)}

.tag{font-weight:500;display:inline-flex;align-items:center;gap:5px}
.tag--yes{color:var(--green)}.tag--yes::before{content:"\2713";font-weight:700}
.tag--no{color:var(--red)}.tag--no::before{content:"\2717";font-weight:700}
.tag--mid{color:var(--orange)}.tag--mid::before{content:"~";font-weight:700}

.comparison-link{text-align:center;margin-top:4px}
.comparison-link a{
  color:var(--blue);text-decoration:none;font-size:14px;font-weight:500;
  display:inline-flex;align-items:center;gap:6px;transition:gap .2s;
}
.comparison-link a:hover{gap:10px}

/* ---------- SECURITY ---------- */
.security{padding:48px 0;background:var(--bg)}
.security-card{
  display:flex;align-items:center;gap:20px;
  max-width:760px;margin:0 auto;padding:28px;
  background:linear-gradient(135deg,rgba(52,199,89,.07),rgba(52,199,89,.03));
  border:1px solid rgba(52,199,89,.18);border-radius:var(--radius);
}
.security-card h3{font-size:16px;font-weight:600;margin-bottom:6px}
.security-card p{font-size:13px;color:var(--text2);line-height:1.6}
.security-card>svg{flex-shrink:0}

/* ---------- DOWNLOAD ---------- */
.download{padding:100px 0;background:var(--bg2)}
.download-card{
  display:flex;align-items:center;gap:20px;
  max-width:560px;margin:0 auto;padding:28px;
  background:var(--bg);border-radius:var(--radius);box-shadow:var(--shadow);
}
.download-icon{
  flex-shrink:0;width:60px;height:60px;
  display:flex;align-items:center;justify-content:center;
  background:var(--bg2);border-radius:14px;
}
.download-info{flex:1}
.download-info h3{font-size:17px;font-weight:600;margin-bottom:2px}
.download-info p{font-size:13px;color:var(--text2)}
.download-note{text-align:center;margin-top:20px}
.download-note p{font-size:12px;color:var(--text2)}

/* ---------- FOOTER ---------- */
.footer{padding:36px 0;background:var(--bg2);border-top:1px solid var(--border)}
.footer-inner{
  max-width:1120px;margin:0 auto;padding:0 24px;
  display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:20px;
}
.footer-inner strong{font-size:15px}
.footer-inner p{font-size:12px;color:var(--text2);margin-top:2px}
.footer-inner nav{display:flex;gap:20px}
.footer-inner nav a{font-size:13px;color:var(--text2);text-decoration:none;transition:color .2s}
.footer-inner nav a:hover{color:var(--text)}

/* ---------- ANIMATIONS ---------- */
@keyframes fadeUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}

[data-animate]{opacity:0;transform:translateY(20px);transition:opacity .5s ease,transform .5s ease}
[data-animate].visible{opacity:1;transform:translateY(0)}

/* ---------- RESPONSIVE ---------- */
@media(max-width:900px){
  .features-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:640px){
  .nav-links a:not(.nav-download){display:none}
  .hero{padding:100px 20px 60px}
  .hero-buttons{flex-direction:column;max-width:280px;margin:0 auto}
  .btn{width:100%}
  .features,.comparison,.download{padding:72px 0}
  .section-subtitle{margin-bottom:36px}
  .features-grid{grid-template-columns:1fr}
  .download-card{flex-direction:column;text-align:center}
  .security-card{flex-direction:column;text-align:center}
  .footer-inner{flex-direction:column;text-align:center}
  .footer-inner nav{justify-content:center}
}