/* ===== 重置 & 基础 ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:#1f2937;background:#fff;line-height:1.6;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:0}
h1,h2,h3,h4{font-weight:700;color:#111827}

/* ===== 设计 token ===== */
:root{
  --primary:#ff7a6d;
  --primary-deep:#ff5a4a;
  --primary-bg:#fff5f3;
  --primary-fg:#fff;
  --text-1:#111827;
  --text-2:#374151;
  --text-3:#6b7280;
  --bg:#ffffff;
  --bg-alt:#fafbfc;
  --bg-soft:#f6f8fb;
  --border:#e5e7eb;
  --shadow-sm:0 2px 8px rgba(0,0,0,.04);
  --shadow:0 8px 30px rgba(0,0,0,.06);
  --shadow-lg:0 20px 60px rgba(255,90,74,.18);
  --r-sm:10px;--r:14px;--r-lg:24px;--r-xl:32px;
  --grad:linear-gradient(135deg,#ff6b5f 0%,#ff9a8b 100%);
  --grad-soft:linear-gradient(135deg,#fff5f3 0%,#FFEDD5 100%);
  --container:1180px;
  --nav-h:64px;
}

/* ===== 容器 ===== */
.container{max-width:var(--container);margin:0 auto;padding:0 24px}

/* ===== 导航 ===== */
.nav{
  position:sticky;top:0;z-index:50;height:var(--nav-h);
  background:rgba(255,255,255,.85);backdrop-filter:saturate(160%) blur(12px);
  -webkit-backdrop-filter:saturate(160%) blur(12px);
  border-bottom:1px solid rgba(229,231,235,.6);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:100%;gap:32px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--text-1)}
.brand-logo{width:36px;height:36px;border-radius:10px}
.brand-name{font-size:18px;letter-spacing:-.01em}
.nav-links{display:flex;align-items:center;gap:32px;flex:1;justify-content:center}
.nav-links a{font-size:15px;color:var(--text-2);transition:color .2s}
.nav-links a:hover{color:var(--primary)}
.nav-cta{flex-shrink:0}
.nav-toggle{display:none;width:36px;height:36px;flex-direction:column;justify-content:center;gap:5px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--text-1);border-radius:1px;transition:transform .2s}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:999px;font-weight:600;font-size:15px;
  transition:transform .15s,box-shadow .2s,background .2s;
  white-space:nowrap;
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 4px 14px rgba(255,90,74,.3)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 8px 20px rgba(255,90,74,.4)}
.btn-ghost{background:transparent;color:var(--text-1);border:1px solid var(--border)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.btn-light{background:#fff;color:var(--text-1);box-shadow:var(--shadow)}
.btn-light:hover{transform:translateY(-1px);box-shadow:var(--shadow-lg)}
.btn-sm{padding:8px 18px;font-size:14px}
.btn-lg{padding:16px 32px;font-size:16px}

/* ===== Hero ===== */
.hero{
  position:relative;overflow:hidden;padding:80px 0 60px;
  background:
    radial-gradient(60% 80% at 90% 0%,rgba(255,154,139,.16),transparent 60%),
    radial-gradient(50% 70% at 0% 30%,rgba(255,232,224,.4),transparent 70%),
    linear-gradient(180deg,#fff 0%,#fffbf8 100%);
}
.hero-inner{display:grid;grid-template-columns:1.1fr 1fr;gap:60px;align-items:center}
.eyebrow{display:inline-block;font-size:13px;font-weight:600;color:var(--primary);background:var(--primary-bg);padding:6px 14px;border-radius:999px;letter-spacing:.02em}
.hero-h1{font-size:64px;line-height:1.1;letter-spacing:-.025em;margin:24px 0 20px}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;display:inline-block}
.hero-sub{font-size:18px;color:var(--text-2);line-height:1.7;max-width:540px}
.hero-cta{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap}
.hero-meta{display:flex;gap:24px;margin-top:32px;list-style:none;flex-wrap:wrap}
.hero-meta li{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-3)}
.dot{width:6px;height:6px;border-radius:50%;background:var(--primary);box-shadow:0 0 0 3px rgba(255,122,109,.18)}

/* Hero 视觉 */
.hero-visual{position:relative;display:flex;justify-content:center;align-items:center}
.phone-frame{
  position:relative;width:280px;height:560px;border-radius:42px;
  background:linear-gradient(160deg,#2a2a2a,#000);
  padding:14px;box-shadow:0 30px 80px rgba(0,0,0,.18),0 0 0 2px rgba(255,255,255,.05) inset;
}
.phone-screen{
  width:100%;height:100%;border-radius:32px;background:#fafbfc;overflow:hidden;
  position:relative;display:flex;flex-direction:column;
}
.phone-header{height:38px;background:#fff;display:flex;align-items:center;justify-content:center;color:#9ca3af;font-size:13px;font-weight:600}
.phone-card{margin:18px;padding:18px;background:#fff;border-radius:18px;box-shadow:0 8px 24px rgba(0,0,0,.04);flex:1}
.phone-tag{display:inline-block;font-size:11px;color:var(--primary);background:var(--primary-bg);padding:3px 10px;border-radius:999px;margin-bottom:10px;font-weight:600}
.phone-title{font-size:16px;font-weight:700;color:var(--text-1);margin-bottom:14px}
.phone-bar{height:6px;background:#f1f3f7;border-radius:3px;overflow:hidden;margin-bottom:18px}
.phone-bar span{display:block;height:100%;background:var(--grad);border-radius:3px;animation:pbar 2.4s ease-in-out infinite}
@keyframes pbar{0%,100%{width:40%}50%{width:82%}}
.phone-list{display:flex;flex-direction:column;gap:10px}
.phone-li{display:flex;justify-content:space-between;font-size:13px;color:var(--text-2);padding:8px 0;border-bottom:1px dashed #f1f3f7}
.phone-li:last-child{border-bottom:0}
.phone-bottom{height:24px;background:#fff}
.hero-glow{
  position:absolute;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,154,139,.35),transparent 70%);
  top:50%;left:50%;transform:translate(-50%,-50%);z-index:-1;filter:blur(40px);
}

/* ===== 通用 section ===== */
.section{padding:96px 0}
.section-alt{background:var(--bg-alt)}
.sec-head{text-align:center;max-width:760px;margin:0 auto 56px}
.sec-head .eyebrow{margin-bottom:14px}
.sec-h2{font-size:42px;line-height:1.2;letter-spacing:-.02em;margin-bottom:16px}
.sec-sub{font-size:17px;color:var(--text-3);line-height:1.7}

/* ===== 网格 ===== */
.grid{display:grid;gap:20px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

/* ===== Why 卡片 ===== */
.why-card{
  padding:32px 24px;background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);
  transition:transform .2s,box-shadow .2s;
}
.why-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.why-num{
  display:inline-block;font-size:13px;font-weight:700;color:#fff;
  background:var(--grad);padding:4px 12px;border-radius:999px;margin-bottom:16px;
}
.why-card h3{font-size:18px;margin-bottom:8px}
.why-card p{font-size:14px;color:var(--text-3);line-height:1.7}

/* ===== 功能卡片 ===== */
.feat-card{
  padding:32px 28px;background:#fff;border-radius:var(--r-lg);
  border:1px solid var(--border);transition:transform .2s,box-shadow .2s;
}
.feat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.feat-ico{
  width:48px;height:48px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  color:#fff;margin-bottom:18px;
}
.feat-ico-1{background:linear-gradient(135deg,#ff6b5f,#ff9a8b)}
.feat-ico-2{background:linear-gradient(135deg,#6366f1,#a78bfa)}
.feat-ico-3{background:linear-gradient(135deg,#f59e0b,#fbbf24)}
.feat-ico-4{background:linear-gradient(135deg,#10b981,#34d399)}
.feat-card h3{font-size:18px;margin-bottom:8px}
.feat-card p{font-size:14px;color:var(--text-3);line-height:1.7}
.feat-extra{margin-top:20px}

/* ===== feat-mini 卡片 ===== */
.feat-mini{
  padding:24px;background:#fff;border-radius:var(--r);border:1px dashed var(--border);
  display:flex;flex-direction:column;gap:10px;align-items:flex-start;
}
.feat-mini-ico{font-size:28px}
.feat-mini h4{font-size:16px}
.feat-mini p{font-size:14px;color:var(--text-3);line-height:1.6}

/* ===== 流程 ===== */
.steps{display:flex;align-items:stretch;justify-content:space-between;gap:12px;flex-wrap:wrap}
.step{
  flex:1;min-width:240px;padding:36px 28px;background:#fff;border-radius:var(--r-lg);
  border:1px solid var(--border);position:relative;
}
.step-num{
  font-size:48px;font-weight:900;line-height:1;letter-spacing:-.04em;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:16px;
}
.step h3{font-size:20px;margin-bottom:10px}
.step p{font-size:14px;color:var(--text-3);line-height:1.7}
.step-arrow{
  width:60px;flex-shrink:0;align-self:center;height:2px;background:linear-gradient(90deg,var(--primary),transparent);
  position:relative;
}
.step-arrow::after{
  content:'';position:absolute;right:-2px;top:50%;transform:translateY(-50%);
  border:6px solid transparent;border-left-color:var(--primary);
}

/* ===== 人群 ===== */
.aud-card{
  padding:32px 24px;background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);
  text-align:center;transition:transform .2s;
}
.aud-card:hover{transform:translateY(-4px)}
.aud-emoji{font-size:42px;margin-bottom:14px}
.aud-card h3{font-size:18px;margin-bottom:8px}
.aud-card p{font-size:14px;color:var(--text-3);line-height:1.7}

/* ===== 公告 ===== */
.ann-card{
  max-width:780px;margin:0 auto;padding:36px 40px;background:#fff;
  border-radius:var(--r-xl);border:1px solid var(--border);box-shadow:var(--shadow);
}
.ann-date{display:inline-block;font-size:13px;color:var(--primary);background:var(--primary-bg);padding:4px 12px;border-radius:999px;font-weight:600;margin-bottom:16px}
.ann-card h3{font-size:22px;margin-bottom:14px}
.ann-card p{color:var(--text-2);line-height:1.8;margin-bottom:16px}
.ann-list{list-style:none;display:flex;flex-direction:column;gap:8px}
.ann-list li{font-size:15px;color:var(--text-2);padding-left:0}

/* ===== FAQ ===== */
.faq{max-width:780px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{
  background:#fff;border:1px solid var(--border);border-radius:var(--r);padding:18px 22px;
  transition:border-color .2s;
}
.faq-item[open]{border-color:var(--primary);box-shadow:0 4px 14px rgba(255,90,74,.08)}
.faq-item summary{
  font-size:16px;font-weight:600;color:var(--text-1);cursor:pointer;list-style:none;
  display:flex;justify-content:space-between;align-items:center;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:'+';font-size:22px;color:var(--text-3);font-weight:400;
  transition:transform .2s,color .2s;
}
.faq-item[open] summary::after{content:'−';color:var(--primary)}
.faq-item p{margin-top:12px;color:var(--text-2);line-height:1.8}

/* ===== CTA ===== */
.section-cta{
  background:var(--grad);color:#fff;padding:80px 0;text-align:center;position:relative;overflow:hidden;
}
.section-cta::before{
  content:'';position:absolute;top:-50%;left:-10%;width:600px;height:600px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.2),transparent 70%);filter:blur(40px);
}
.cta-inner{position:relative}
.cta-h2{font-size:42px;color:#fff;margin-bottom:14px;letter-spacing:-.02em}
.cta-sub{font-size:18px;color:rgba(255,255,255,.92);margin-bottom:36px}
.cta-buttons{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.cta-tip{margin-top:24px;font-size:13px;color:rgba(255,255,255,.7)}

/* ===== 页脚 ===== */
.footer{background:#0f172a;color:#cbd5e1;padding:64px 0 24px}
.footer-inner{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-desc{margin-top:14px;font-size:14px;color:#94a3b8;line-height:1.7}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600}
.footer-col a{display:block;font-size:14px;color:#94a3b8;margin-bottom:10px;transition:color .2s}
.footer-col a:hover{color:#fff}
.footer-bottom{
  display:flex;justify-content:center;align-items:center;gap:14px;
  padding-top:24px;border-top:1px solid #1e293b;font-size:13px;color:#94a3b8;
  flex-wrap:wrap;
}
.footer-bottom a:hover{color:#fff}
.footer-divider{color:#475569}

/* ===== 响应式 ===== */
@media (max-width:960px){
  .nav-links{display:none;position:absolute;top:var(--nav-h);left:0;right:0;background:#fff;flex-direction:column;padding:16px 24px;gap:18px;border-bottom:1px solid var(--border);box-shadow:var(--shadow)}
  .nav-links.open{display:flex}
  .nav-cta{display:none}
  .nav-toggle{display:flex}
  .hero{padding:48px 0 40px}
  .hero-inner{grid-template-columns:1fr;gap:40px;text-align:center}
  .hero-sub{margin:0 auto}
  .hero-cta{justify-content:center}
  .hero-meta{justify-content:center}
  .hero-h1{font-size:42px}
  .phone-frame{width:220px;height:440px}
  .section{padding:64px 0}
  .sec-h2{font-size:30px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:1fr}
  .steps{flex-direction:column}
  .step-arrow{display:none}
  .footer-inner{grid-template-columns:1fr 1fr;gap:32px}
  .cta-h2{font-size:30px}
  .btn-lg{padding:14px 24px;font-size:15px}
}
@media (max-width:520px){
  .hero-h1{font-size:34px}
  .grid-4{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr}
  .ann-card{padding:28px 22px}
}