/* ===== 天博体育 APP站 ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#e11d48;--primary-dark:#be123c;--primary-light:#fecdd3;
  --accent:#f59e0b;--accent2:#8b5cf6;
  --dark:#0f172a;--dark2:#1a1a2e;--dark3:#16213e;--dark4:#0f3460;
  --light:#f8fafc;--gray:#94a3b8;--border:#1e3a5f;
  --radius:16px;--shadow:0 8px 32px rgba(0,0,0,.5);
  --transition:.3s ease;
}
html{scroll-behavior:smooth}
body{font-family:'PingFang SC','Microsoft YaHei',Arial,sans-serif;background:var(--dark);color:#e2e8f0;line-height:1.6;font-size:16px}
a{text-decoration:none;color:inherit}
ul{list-style:none}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 16px}

/* ===== HEADER ===== */
.site-header{position:sticky;top:0;z-index:100;background:rgba(26,26,46,.97);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);padding:0}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-size:1.3rem;font-weight:800;color:var(--primary);letter-spacing:1px}
.main-nav{display:flex;gap:4px}
.main-nav a{padding:8px 14px;border-radius:8px;font-size:.9rem;color:var(--gray);transition:var(--transition)}
.main-nav a:hover,.main-nav a.active{color:#fff;background:var(--dark3)}
.download-btn{display:inline-block;padding:8px 20px;background:var(--primary);color:#fff;font-weight:700;border-radius:24px;font-size:.85rem;transition:var(--transition)}
.download-btn:hover{background:var(--primary-dark);transform:scale(1.05)}

/* ===== HERO ===== */
.app-hero{background:linear-gradient(135deg,var(--dark) 0%,var(--dark4) 50%,var(--dark) 100%);padding:70px 0 50px;position:relative;overflow:hidden}
.app-hero::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse at 30% 50%,rgba(225,29,72,.15),transparent 60%)}
.app-hero-grid{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:40px}
.hero-badge{display:inline-block;background:linear-gradient(135deg,var(--primary),var(--accent2));color:#fff;font-size:.8rem;font-weight:700;padding:6px 16px;border-radius:20px;margin-bottom:16px}
.app-hero-text h1{font-size:2.8rem;font-weight:900;color:#fff;margin-bottom:16px;line-height:1.2}
.hero-desc{font-size:1rem;color:var(--gray);margin-bottom:28px;max-width:480px}
.hero-btns{display:flex;gap:12px;margin-bottom:20px}
.btn-primary{display:inline-flex;align-items:center;gap:6px;padding:14px 28px;background:var(--primary);color:#fff;font-weight:700;border-radius:12px;font-size:.95rem;transition:var(--transition);border:none;cursor:pointer}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 6px 20px rgba(225,29,72,.4)}
.btn-secondary{display:inline-flex;align-items:center;gap:6px;padding:14px 28px;background:var(--dark3);color:#fff;font-weight:700;border-radius:12px;font-size:.95rem;border:1px solid var(--border);transition:var(--transition)}
.btn-secondary:hover{background:var(--dark4);transform:translateY(-2px)}
.btn-primary.large{padding:16px 36px;font-size:1.1rem}
.hero-features{display:flex;flex-wrap:wrap;gap:16px;font-size:.82rem;color:var(--gray)}
.hero-features span{color:#10b981}
.app-hero-img{text-align:center}
.phone-mockup{width:220px;height:400px;background:linear-gradient(145deg,var(--dark3),var(--dark4));border:3px solid var(--border);border-radius:36px;margin:0 auto;display:flex;align-items:center;justify-content:center;font-size:4rem;box-shadow:var(--shadow)}

/* ===== SECTIONS ===== */
.download-section,.app-screenshots,.download-steps,.promo-section,.testimonials{padding:60px 0}
.section-title{font-size:1.5rem;font-weight:800;color:#fff;margin-bottom:28px;padding-bottom:12px;border-bottom:2px solid var(--primary);display:inline-block}
.features-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.feature-card{background:var(--dark2);border-radius:var(--radius);padding:24px;border:1px solid var(--border);transition:var(--transition);position:relative;overflow:hidden}
.feature-card:hover{border-color:var(--primary);transform:translateY(-4px);box-shadow:var(--shadow)}
.feature-card.highlight{border-color:var(--primary);background:linear-gradient(135deg,var(--dark2),rgba(225,29,72,.08))}
.feature-icon{font-size:2.4rem;margin-bottom:12px}
.feature-card h3{font-size:1.05rem;font-weight:700;margin-bottom:8px;color:#fff}
.feature-card p{font-size:.82rem;color:var(--gray);line-height:1.6}
.feature-tag{position:absolute;top:12px;right:12px;background:var(--primary);color:#fff;font-size:.7rem;font-weight:700;padding:3px 10px;border-radius:10px}

/* ===== SCREENSHOTS ===== */
.app-screenshots{background:var(--dark2)}
.screenshots-scroll{display:flex;gap:16px;overflow-x:auto;padding-bottom:12px;-ms-overflow-style:none;scrollbar-width:none}
.screenshots-scroll::-webkit-scrollbar{display:none}
.screenshot-card{min-width:180px;text-align:center}
.screen-img{width:140px;height:240px;background:var(--dark3);border:2px solid var(--border);border-radius:20px;margin:0 auto 8px;display:flex;align-items:center;justify-content:center;font-size:3rem}
.screenshot-card p{font-size:.8rem;color:var(--gray)}

/* ===== STEPS ===== */
.steps-row{display:flex;align-items:center;justify-content:center;gap:20px;margin-bottom:32px}
.step-item{text-align:center;min-width:180px}
.step-num{width:48px;height:48px;border-radius:50%;background:var(--primary);color:#fff;font-size:1.4rem;font-weight:800;display:flex;align-items:center;justify-content:center;margin:0 auto 10px}
.step-item h3{font-size:.95rem;font-weight:700;margin-bottom:4px;color:#fff}
.step-item p{font-size:.78rem;color:var(--gray)}
.step-arrow{font-size:1.5rem;color:var(--primary);font-weight:700}
.steps-cta{text-align:center}

/* ===== PROMO ===== */
.promo-section{background:var(--dark2)}
.promo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.promo-card{background:var(--dark);border-radius:var(--radius);padding:24px;border:1px solid var(--border);text-align:center;position:relative;overflow:hidden;transition:var(--transition)}
.promo-card:hover{transform:translateY(-3px);border-color:var(--accent);box-shadow:0 4px 24px rgba(245,158,11,.2)}
.promo-card.promo-hot{border-color:var(--primary)}
.promo-badge{position:absolute;top:0;left:0;right:0;background:var(--primary);color:#fff;font-size:.72rem;font-weight:700;padding:4px;text-align:center}
.promo-icon{font-size:2.4rem;margin:16px 0 10px}
.promo-card h3{font-size:1.05rem;font-weight:700;margin-bottom:8px;color:#fff}
.promo-card p{font-size:.8rem;color:var(--gray);margin-bottom:8px}
.promo-code{display:inline-block;background:var(--dark3);border:1px dashed var(--accent);color:var(--accent);font-size:.78rem;font-weight:700;padding:4px 12px;border-radius:6px;margin-bottom:10px}
.promo-detail{font-size:.8rem;color:var(--accent);font-weight:600;margin-bottom:10px}
.promo-btn{width:100%;padding:10px;background:var(--accent);color:#fff;font-weight:700;border:none;border-radius:8px;cursor:pointer;transition:var(--transition);font-size:.9rem}
.promo-btn:hover{background:var(--accent-dark)}

/* ===== REVIEWS ===== */
.reviews-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.review-card{background:var(--dark2);border-radius:var(--radius);padding:24px;border:1px solid var(--border)}
.review-stars{color:var(--accent);font-size:1.1rem;margin-bottom:10px}
.review-card p{font-size:.88rem;color:#e2e8f0;line-height:1.6;margin-bottom:12px;font-style:italic}
.review-author{font-size:.8rem;color:var(--primary);font-weight:600}

/* ===== FOOTER ===== */
.site-footer{background:var(--dark);border-top:1px solid var(--border);padding:40px 0 20px}
.footer-links{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:24px;margin-bottom:28px}
.footer-col h4{font-size:.9rem;font-weight:700;margin-bottom:12px;color:#fff}
.footer-col a,.footer-col p{display:block;font-size:.82rem;color:var(--gray);margin-bottom:6px}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid var(--border)}
.footer-bottom p{font-size:.78rem;color:var(--gray);margin-bottom:4px}
.footer-bottom a{color:var(--primary)}
.disclaimer{color:#e11d48!important;font-size:.75rem!important}

/* ===== RESPONSIVE ===== */
@media(max-width:768px){
  .main-nav{display:none}
  .app-hero-grid{grid-template-columns:1fr}
  .app-hero-img{display:none}
  .hero-btns{flex-direction:column}
  .steps-row{flex-direction:column}
  .step-arrow{transform:rotate(90deg)}
}