/* ===== Reset & Base ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{--primary:#e94560;--secondary:#16213e;--accent:#0f3460;--bg:#f8f9fa;--text:#1a1a2e;--glass:rgba(255,255,255,0.15);--shadow:0 8px 32px rgba(0,0,0,0.1);--radius:16px;--transition:0.3s ease}
[data-theme="dark"]{--primary:#ff6b6b;--secondary:#0a0a1a;--accent:#1a1a3e;--bg:#0d0d1a;--text:#e0e0e0;--glass:rgba(255,255,255,0.05);--shadow:0 8px 32px rgba(0,0,0,0.5)}
body{font-family:'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;background:var(--bg);color:var(--text);line-height:1.6;transition:background var(--transition),color var(--transition);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
a{color:inherit;text-decoration:none}
img,svg{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* ===== Header & Nav ===== */
header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:var(--glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid rgba(255,255,255,0.1);transition:background var(--transition)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;max-width:1200px;margin:0 auto}
.logo{font-size:1.8rem;font-weight:800;background:linear-gradient(135deg,var(--primary),#ff8c00);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-1px;user-select:none}
.nav-links{display:flex;gap:20px;list-style:none}
.nav-links a{color:var(--text);text-decoration:none;font-size:0.95rem;font-weight:500;padding:6px 12px;border-radius:8px;transition:all var(--transition);position:relative}
.nav-links a::after{content:'';position:absolute;bottom:0;left:50%;width:0;height:2px;background:var(--primary);transition:all var(--transition);transform:translateX(-50%)}
.nav-links a:hover::after,.nav-links a.active::after{width:60%}
.nav-links a:hover,.nav-links a.active{background:var(--primary);color:#fff}
.nav-links a:hover::after,.nav-links a.active::after{background:#fff}
.nav-toggle{display:none;background:none;border:none;font-size:1.5rem;color:var(--text);cursor:pointer;padding:4px 8px;border-radius:8px;transition:background var(--transition)}
.nav-toggle:hover{background:var(--glass)}
.dark-toggle{background:none;border:none;font-size:1.2rem;cursor:pointer;color:var(--text);padding:6px 10px;border-radius:8px;transition:all var(--transition)}
.dark-toggle:hover{background:var(--glass)}

/* ===== Hero Section ===== */
.hero{min-height:100vh;display:flex;align-items:center;justify-content:center;text-align:center;background:linear-gradient(135deg,var(--secondary) 0%,var(--accent) 50%,#1a1a2e 100%);padding:120px 20px 60px;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle at 30% 40%,rgba(233,69,96,0.15),transparent 60%),radial-gradient(circle at 70% 60%,rgba(255,140,0,0.1),transparent 50%);animation:heroGlow 8s ease-in-out infinite alternate;pointer-events:none}
@keyframes heroGlow{0%{transform:translate(0,0)}100%{transform:translate(5%,5%)}}
.hero-content{position:relative;z-index:1;max-width:800px}
.hero h1{font-size:3.5rem;font-weight:800;margin-bottom:20px;background:linear-gradient(135deg,#fff 30%,var(--primary) 70%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1.2;animation:fadeInUp 1s ease}
.hero p{font-size:1.2rem;color:rgba(255,255,255,0.8);margin-bottom:40px;animation:fadeInUp 1s ease 0.2s both}
.hero-btn{display:inline-block;padding:14px 40px;background:var(--primary);color:#fff;border-radius:50px;text-decoration:none;font-weight:600;font-size:1.1rem;transition:all var(--transition);box-shadow:0 4px 20px rgba(233,69,96,0.4);animation:fadeInUp 1s ease 0.4s both;position:relative;overflow:hidden}
.hero-btn::before{content:'';position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,0.2),transparent);transition:left 0.5s}
.hero-btn:hover::before{left:100%}
.hero-btn:hover{transform:translateY(-3px);box-shadow:0 8px 30px rgba(233,69,96,0.6)}
.hero-banner{position:relative;width:100%;max-width:900px;margin:40px auto 0;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);animation:fadeInUp 1s ease 0.6s both}
.hero-banner svg{width:100%;height:auto;display:block}

/* ===== Banner Slider ===== */
.banner-slider{position:relative;overflow:hidden;border-radius:var(--radius);max-width:900px;margin:0 auto}
.banner-slide{display:none;animation:fade 0.8s ease}
.banner-slide.active{display:block}
@keyframes fade{from{opacity:0}to{opacity:1}}
.banner-dots{display:flex;justify-content:center;gap:10px;margin-top:16px}
.banner-dot{width:12px;height:12px;border-radius:50%;background:rgba(255,255,255,0.3);cursor:pointer;transition:all var(--transition);border:2px solid transparent}
.banner-dot.active{background:var(--primary);transform:scale(1.2);border-color:rgba(255,255,255,0.5)}
.banner-dot:hover{background:rgba(255,255,255,0.5)}

/* ===== Section ===== */
.section{padding:80px 20px;transition:background var(--transition)}
.section-title{text-align:center;font-size:2.2rem;font-weight:700;margin-bottom:12px;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.section-subtitle{text-align:center;color:rgba(255,255,255,0.6);margin-bottom:50px;font-size:1.05rem}

/* ===== Grid ===== */
.grid-2,.grid-3,.grid-4{display:grid;gap:30px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

/* ===== Card ===== */
.card{background:var(--glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow);border:1px solid rgba(255,255,255,0.08);transition:all var(--transition);position:relative;overflow:hidden}
.card::before{content:'';position:absolute;top:0;left:0;width:100%;height:4px;background:linear-gradient(90deg,var(--primary),var(--accent));transform:scaleX(0);transform-origin:left;transition:transform var(--transition)}
.card:hover::before{transform:scaleX(1)}
.card:hover{transform:translateY(-6px);box-shadow:0 12px 40px rgba(0,0,0,0.15)}
.card-icon{width:60px;height:60px;margin-bottom:16px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--primary),#ff8c00);transition:transform var(--transition)}
.card:hover .card-icon{transform:scale(1.1) rotate(-5deg)}
.card-icon svg{width:32px;height:32px;fill:#fff}
.card h3{font-size:1.3rem;margin-bottom:10px}
.card p{color:rgba(255,255,255,0.7);font-size:0.95rem}

/* ===== Stats ===== */
.stats{display:flex;justify-content:center;gap:50px;flex-wrap:wrap;padding:40px 0}
.stat-item{text-align:center}
.stat-number{font-size:3rem;font-weight:800;background:linear-gradient(135deg,var(--primary),#ff8c00);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.stat-label{color:rgba(255,255,255,0.6);font-size:1rem;margin-top:6px}

/* ===== FAQ ===== */
.faq-item{border-bottom:1px solid rgba(255,255,255,0.1);padding:16px 0;cursor:pointer;transition:background var(--transition)}
.faq-item:hover{background:rgba(255,255,255,0.02)}
.faq-question{display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:1.05rem;user-select:none}
.faq-answer{max-height:0;overflow:hidden;transition:max-height 0.4s ease, padding 0.4s ease;color:rgba(255,255,255,0.7);padding-top:0}
.faq-item.open .faq-answer{max-height:300px;padding-top:12px}
.faq-toggle{font-size:1.2rem;transition:transform 0.3s;font-weight:300}
.faq-item.open .faq-toggle{transform:rotate(45deg)}

/* ===== Footer ===== */
.footer{background:var(--secondary);padding:60px 20px 30px;color:rgba(255,255,255,0.7);transition:background var(--transition)}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;max-width:1200px;margin:0 auto}
.footer h4{color:#fff;margin-bottom:16px;font-size:1.1rem;position:relative;display:inline-block}
.footer h4::after{content:'';position:absolute;bottom:-4px;left:0;width:30px;height:2px;background:var(--primary)}
.footer a{color:rgba(255,255,255,0.6);text-decoration:none;display:block;margin-bottom:8px;transition:color var(--transition);padding:2px 0}
.footer a:hover{color:var(--primary);padding-left:4px}
.footer-bottom{text-align:center;padding-top:30px;border-top:1px solid rgba(255,255,255,0.1);margin-top:30px;max-width:1200px;margin-left:auto;margin-right:auto}

/* ===== Back to Top ===== */
.back-to-top{position:fixed;bottom:30px;right:30px;width:50px;height:50px;border-radius:50%;background:var(--primary);color:#fff;border:none;font-size:1.5rem;cursor:pointer;box-shadow:0 4px 20px rgba(233,69,96,0.4);opacity:0;visibility:hidden;transition:all var(--transition);z-index:999;display:flex;align-items:center;justify-content:center}
.back-to-top.show{opacity:1;visibility:visible}
.back-to-top:hover{transform:translateY(-3px);box-shadow:0 6px 25px rgba(233,69,96,0.6)}

/* ===== Search Box ===== */
.search-box{display:flex;max-width:400px;margin:20px auto;background:var(--glass);border-radius:50px;padding:4px;backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,0.08);transition:border-color var(--transition)}
.search-box:focus-within{border-color:var(--primary)}
.search-box input{flex:1;border:none;background:transparent;padding:12px 20px;color:var(--text);outline:none;font-size:1rem}
.search-box input::placeholder{color:rgba(255,255,255,0.4)}
.search-box button{background:var(--primary);border:none;border-radius:50px;padding:10px 24px;color:#fff;font-weight:600;cursor:pointer;transition:all var(--transition)}
.search-box button:hover{background:#d63850;transform:scale(1.02)}

/* ===== Breadcrumb ===== */
.breadcrumb{display:flex;gap:8px;padding:20px 0;font-size:0.9rem;color:rgba(255,255,255,0.5);max-width:1200px;margin:0 auto}
.breadcrumb a{color:var(--primary);text-decoration:none;transition:color var(--transition)}
.breadcrumb a:hover{color:#ff8c00;text-decoration:underline}
.breadcrumb span{color:rgba(255,255,255,0.4)}

/* ===== Scroll Animation ===== */
.animated{opacity:0;transform:translateY(30px);transition:all 0.6s ease}
.animated.show{opacity:1;transform:translateY(0)}
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}

/* ===== HowTo Steps ===== */
.howto-steps{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;counter-reset:step}
.howto-step{flex:1;min-width:200px;max-width:280px;text-align:center;padding:30px 20px;background:var(--glass);border-radius:var(--radius);backdrop-filter:blur(12px);position:relative;border:1px solid rgba(255,255,255,0.05);transition:all var(--transition)}
.howto-step:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.howto-step::before{counter-increment:step;content:counter(step);position:absolute;top:-12px;left:50%;transform:translateX(-50%);width:36px;height:36px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;box-shadow:0 4px 12px rgba(233,69,96,0.3)}
.howto-step h3{margin-bottom:8px;font-size:1.1rem}

/* ===== Related Articles ===== */
.related-articles{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.related-articles .card{padding:24px}
.related-articles .card h3{font-size:1.1rem;margin-bottom:8px}

/* ===== Pagination ===== */
.pagination{display:flex;justify-content:center;gap:10px;margin-top:40px}
.pagination a{padding:8px 16px;border-radius:8px;background:var(--glass);text-decoration:none;color:var(--text);transition:all var(--transition);border:1px solid transparent}
.pagination a:hover,.pagination a.active{background:var(--primary);color:#fff;border-color:var(--primary)}

/* ===== EEAT Section ===== */
.eeat-section{background:var(--glass);border-radius:var(--radius);padding:30px;margin-top:40px;backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,0.05)}
.eeat-section h3{color:var(--primary);margin-bottom:12px;font-size:1.3rem}
.eeat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px}
.eeat-item{font-size:0.9rem;padding:8px 0;border-bottom:1px solid rgba(255,255,255,0.03)}
.eeat-item strong{color:var(--text);margin-right:4px}

/* ===== Friend Links ===== */
.friend-links{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;padding:20px 0}
.friend-links a{color:rgba(255,255,255,0.6);text-decoration:none;padding:6px 16px;border-radius:20px;background:var(--glass);font-size:0.9rem;transition:all var(--transition);border:1px solid transparent}
.friend-links a:hover{color:var(--primary);background:rgba(233,69,96,0.1);border-color:rgba(233,69,96,0.3);transform:translateY(-2px)}

/* ===== Sitemap ===== */
.sitemap{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:16px;padding:20px 0}
.sitemap a{color:rgba(255,255,255,0.6);text-decoration:none;font-size:0.9rem;transition:color var(--transition);padding:4px 0;border-bottom:1px solid transparent}
.sitemap a:hover{color:var(--primary);border-bottom-color:var(--primary)}

/* ===== Testimonial ===== */
.testimonial-card{background:var(--glass);border-radius:var(--radius);padding:24px;backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,0.05);transition:all var(--transition)}
.testimonial-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.testimonial-card p{font-style:italic;margin-bottom:12px;line-height:1.7}
.testimonial-author{font-weight:600;color:var(--primary)}

/* ===== SVG Icon Helper ===== */
.svg-icon{width:24px;height:24px;fill:currentColor}

/* ===== Responsive ===== */
@media(max-width:1024px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .hero h1{font-size:2.8rem}
}
@media(max-width:768px){
  .nav-links{display:none;position:absolute;top:100%;left:0;width:100%;background:var(--bg);flex-direction:column;padding:20px;gap:12px;box-shadow:var(--shadow);border-top:1px solid rgba(255,255,255,0.1);transition:background var(--transition)}
  .nav-links.open{display:flex}
  .nav-toggle{display:block}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .hero h1{font-size:2.2rem}
  .hero p{font-size:1rem}
  .hero-btn{padding:12px 30px;font-size:1rem}
  .section{padding:60px 20px}
  .section-title{font-size:1.8rem}
  .stats{gap:30px}
  .stat-number{font-size:2.2rem}
  .footer-grid{grid-template-columns:1fr 1fr;gap:20px}
  .footer{padding:40px 20px 20px}
  .breadcrumb{padding:16px 20px;font-size:0.8rem}
  .howto-step{min-width:150px;max-width:100%}
  .back-to-top{width:44px;height:44px;font-size:1.3rem;bottom:20px;right:20px}
  .banner-dot{width:10px;height:10px}
}
@media(max-width:480px){
  .hero h1{font-size:1.8rem}
  .hero{padding:100px 16px 40px}
  .section{padding:40px 16px}
  .section-title{font-size:1.5rem}
  .card{padding:20px}
  .stat-number{font-size:1.8rem}
  .footer-grid{grid-template-columns:1fr}
  .friend-links a{padding:4px 12px;font-size:0.8rem}
  .search-box input{padding:10px 16px}
  .search-box button{padding:8px 18px}
  .eeat-grid{grid-template-columns:1fr}
  .sitemap{grid-template-columns:repeat(2,1fr)}
  .related-articles{grid-template-columns:1fr}
}

/* ===== Dark Mode Transitions ===== */
[data-theme="dark"] .card,
[data-theme="dark"] .search-box,
[data-theme="dark"] .eeat-section,
[data-theme="dark"] .testimonial-card,
[data-theme="dark"] .friend-links a,
[data-theme="dark"] .pagination a,
[data-theme="dark"] .howto-step{border-color:rgba(255,255,255,0.05)}
[data-theme="dark"] .nav-links{background:var(--bg)}

/* ===== Additional Polish ===== */
::selection{background:var(--primary);color:#fff}
::-webkit-scrollbar{width:8px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--primary);border-radius:4px}
::-webkit-scrollbar-thumb:hover{background:#d63850}

/* ===== Print ===== */
@media print{
  header,.back-to-top,.banner-dots,.search-box,.pagination,.friend-links{display:none}
  .hero{min-height:auto;padding:40px 20px}
  .card{box-shadow:none;border:1px solid #ddd}
  body{background:#fff;color:#000}
  .section-title,.hero h1{-webkit-text-fill-color:#000;color:#000;background:none}
}