/* ========== 全局样式 ========== */
:root {
    --primary: #0a1628;
    --primary-light: #1a2a4a;
    --accent: #d4a843;
    --accent-hover: #c19a3a;
    --white: #ffffff;
    --light-gray: #f5f6fa;
    --text-dark: #1a1a2e;
    --text-gray: #6b7280;
    --border: #e5e7eb;
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s ease;
    --font-main: 'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
}
* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; -webkit-tap-highlight-color:transparent; }
body {
    font-family:var(--font-main);
    background:var(--light-gray);
    color:var(--text-dark);
    line-height:1.6;
    overflow-x:hidden;
    padding-bottom:0;
}
a { text-decoration:none; color:inherit; transition:var(--transition); }
img { max-width:100%; height:auto; display:block; }
.container { max-width:1200px; margin:0 auto; padding:0 20px; }

/* 顶部栏 */
.top-bar {
    background:var(--white);
    border-bottom:1px solid var(--border);
    position:sticky; top:0; z-index:1000;
    box-shadow:0 2px 10px rgba(0,0,0,0.04);
}
.top-bar-inner {
    display:flex; align-items:center; justify-content:space-between;
    padding:12px 20px; max-width:1200px; margin:0 auto;
    flex-wrap:wrap; gap:10px;
}
.logo { display:flex; align-items:center; gap:10px; font-size:1.6rem; font-weight:800; color:var(--primary); letter-spacing:-0.5px; }
.logo-icon {
    width:42px; height:42px; background:var(--primary); border-radius:50%;
    display:flex; align-items:center; justify-content:center;
    color:var(--accent); font-weight:900; font-size:1.4rem; flex-shrink:0;
}
.logo span { color:var(--accent); }

.main-nav { display:flex; align-items:center; gap:6px; flex:1; justify-content:center; }
.main-nav a {
    padding:8px 16px; font-size:0.95rem; font-weight:500;
    color:var(--text-dark); border-radius:var(--radius-sm);
    position:relative; transition:var(--transition); white-space:nowrap;
}
.main-nav a:hover, .main-nav a.active { color:var(--accent); background:rgba(212,168,67,0.08); }
.main-nav a::after {
    content:''; position:absolute; bottom:4px; left:50%; transform:translateX(-50%);
    width:0; height:2px; background:var(--accent); transition:var(--transition); border-radius:2px;
}
.main-nav a:hover::after, .main-nav a.active::after { width:24px; }

.top-actions { display:flex; align-items:center; gap:10px; flex-direction:column; }
.top-buttons { display:flex; gap:10px; align-items:center; }
.btn {
    display:inline-flex; align-items:center; gap:6px; padding:10px 22px;
    font-size:0.9rem; font-weight:600; border-radius:50px; border:none;
    cursor:pointer; transition:var(--transition); white-space:nowrap; letter-spacing:0.3px;
}
.btn-accent { background:var(--accent); color:var(--white); box-shadow:0 4px 14px rgba(212,168,67,0.35); }
.btn-accent:hover { background:var(--accent-hover); box-shadow:0 6px 20px rgba(212,168,67,0.5); transform:translateY(-2px); }
.btn-outline { background:transparent; color:var(--primary); border:2px solid var(--primary); }
.btn-outline:hover { background:var(--primary); color:var(--white); transform:translateY(-2px); }
.btn-sm { padding:8px 18px; font-size:0.85rem; }

.qq-contact { font-size:0.8rem; color:var(--text-gray); display:flex; align-items:center; gap:8px; letter-spacing:0.5px; }
.qq-contact .qq-icon { display:inline-flex; align-items:center; gap:4px; color:#07c160; font-weight:600; }
.qq-contact .qq-icon svg { width:16px; height:16px; }

.hamburger { display:none; flex-direction:column; gap:5px; cursor:pointer; padding:6px; background:none; border:none; z-index:1001; }
.hamburger span { display:block; width:26px; height:3px; background:var(--primary); border-radius:3px; transition:var(--transition); }
.hamburger.active span:nth-child(1) { transform:translateY(8px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity:0; transform:scaleX(0); }
.hamburger.active span:nth-child(3) { transform:translateY(-8px) rotate(-45deg); }

/* 手机端底部固定按钮 */
.mobile-bottom-bar {
    display:none; position:fixed; bottom:0; left:0; right:0;
    background:var(--white); border-top:2px solid var(--border);
    z-index:999; box-shadow:0 -4px 20px rgba(0,0,0,0.1);
    padding:10px 16px; padding-bottom:calc(10px + env(safe-area-inset-bottom,0px));
    gap:12px;
}
.mobile-bottom-bar .btn { flex:1; justify-content:center; padding:14px 16px; font-size:0.95rem; border-radius:8px; }

/* Hero */
.hero {
    background:linear-gradient(135deg,#0a1628 0%,#1a2a4a 40%,#0d1f3c 100%);
    color:var(--white); padding:80px 0 100px; position:relative; overflow:hidden;
}
.hero::before {
    content:''; position:absolute; top:-50%; right:-20%; width:600px; height:600px;
    background:radial-gradient(circle,rgba(212,168,67,0.15) 0%,transparent 70%);
    border-radius:50%; pointer-events:none;
}
.hero::after {
    content:''; position:absolute; bottom:-30%; left:-10%; width:500px; height:500px;
    background:radial-gradient(circle,rgba(212,168,67,0.1) 0%,transparent 70%);
    border-radius:50%; pointer-events:none;
}
.hero-content { position:relative; z-index:2; max-width:600px; }
.hero h1 { font-size:3rem; font-weight:800; line-height:1.2; margin-bottom:20px; letter-spacing:-1px; }
.hero h1 .highlight { color:var(--accent); display:block; }
.hero p { font-size:1.15rem; color:rgba(255,255,255,0.8); margin-bottom:32px; line-height:1.8; }
.hero-buttons { display:flex; gap:16px; flex-wrap:wrap; }
.hero-buttons .btn { padding:14px 32px; font-size:1rem; }
.btn-ghost { background:transparent; color:var(--white); border:2px solid rgba(255,255,255,0.4); }
.btn-ghost:hover { border-color:var(--white); background:rgba(255,255,255,0.1); transform:translateY(-2px); }
.hero-stats { display:flex; gap:40px; margin-top:50px; flex-wrap:wrap; position:relative; z-index:2; }
.hero-stat { text-align:center; }
.hero-stat .number { font-size:2.2rem; font-weight:800; color:var(--accent); display:block; }
.hero-stat .label { font-size:0.9rem; color:rgba(255,255,255,0.7); }

/* 通用区块 */
.section { padding:70px 0; }
.section-header { text-align:center; margin-bottom:50px; }
.section-header h2 { font-size:2.2rem; font-weight:800; color:var(--primary); margin-bottom:12px; letter-spacing:-0.5px; }
.section-header .subtitle { font-size:1.05rem; color:var(--text-gray); max-width:600px; margin:0 auto; }
.section-header .divider { width:60px; height:3px; background:var(--accent); margin:16px auto 0; border-radius:3px; }

.card-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(280px,1fr)); gap:24px; }
.card {
    background:var(--white); border-radius:var(--radius); padding:30px;
    box-shadow:var(--shadow); transition:var(--transition); border:1px solid var(--border);
}
.card:hover { transform:translateY(-6px); box-shadow:var(--shadow-lg); border-color:rgba(212,168,67,0.3); }
.card-icon {
    width:56px; height:56px; border-radius:12px; display:flex; align-items:center;
    justify-content:center; font-size:1.6rem; margin-bottom:16px;
    background:rgba(212,168,67,0.1); color:var(--accent);
}
.card h3 { font-size:1.2rem; font-weight:700; margin-bottom:10px; color:var(--primary); }
.card p { font-size:0.9rem; color:var(--text-gray); line-height:1.7; }

.product-table-wrapper { background:var(--white); border-radius:var(--radius); box-shadow:var(--shadow); overflow:hidden; border:1px solid var(--border); }
.product-table { width:100%; border-collapse:collapse; font-size:0.9rem; }
.product-table th { background:var(--primary); color:var(--white); padding:14px 16px; text-align:left; font-weight:600; white-space:nowrap; }
.product-table td { padding:12px 16px; border-bottom:1px solid var(--border); color:var(--text-dark); }
.product-table tr:hover td { background:rgba(212,168,67,0.05); }
.change-up { color:#10b981; font-weight:600; }
.change-down { color:#ef4444; font-weight:600; }

.news-list { display:grid; grid-template-columns:repeat(auto-fit,minmax(340px,1fr)); gap:24px; }
.news-card { background:var(--white); border-radius:var(--radius); overflow:hidden; box-shadow:var(--shadow); transition:var(--transition); border:1px solid var(--border); display:flex; flex-direction:column; }
.news-card:hover { transform:translateY(-4px); box-shadow:var(--shadow-lg); }
.news-card-body { padding:20px; flex:1; display:flex; flex-direction:column; }
.news-card .news-date { font-size:0.8rem; color:var(--accent); font-weight:600; margin-bottom:8px; }
.news-card h4 { font-size:1.05rem; font-weight:700; margin-bottom:8px; color:var(--primary); line-height:1.4; }
.news-card p { font-size:0.9rem; color:var(--text-gray); line-height:1.6; flex:1; }
.news-card .read-more { margin-top:12px; font-size:0.85rem; font-weight:600; color:var(--accent); display:inline-flex; align-items:center; gap:4px; }

.download-cards { display:grid; grid-template-columns:repeat(auto-fit,minmax(260px,1fr)); gap:24px; }
.download-card { background:var(--white); border-radius:var(--radius); padding:30px; text-align:center; box-shadow:var(--shadow); border:1px solid var(--border); transition:var(--transition); }
.download-card:hover { transform:translateY(-4px); box-shadow:var(--shadow-lg); }
.download-card .platform-icon { font-size:3rem; margin-bottom:16px; }
.download-card h4 { font-size:1.1rem; font-weight:700; margin-bottom:8px; }
.download-card p { font-size:0.85rem; color:var(--text-gray); margin-bottom:16px; }

.contact-grid { display:grid; grid-template-columns:1fr 1fr; gap:40px; }
.contact-info-item { display:flex; align-items:flex-start; gap:14px; margin-bottom:24px; }
.contact-info-item .ci-icon { width:44px; height:44px; border-radius:50%; background:rgba(212,168,67,0.1); display:flex; align-items:center; justify-content:center; font-size:1.2rem; color:var(--accent); flex-shrink:0; }
.contact-info-item h5 { font-size:1rem; font-weight:700; margin-bottom:4px; }
.contact-info-item p { font-size:0.9rem; color:var(--text-gray); }
.contact-form input, .contact-form textarea { width:100%; padding:12px 16px; border:1px solid var(--border); border-radius:var(--radius-sm); font-size:0.95rem; font-family:inherit; margin-bottom:16px; transition:var(--transition); background:var(--white); }
.contact-form input:focus, .contact-form textarea:focus { outline:none; border-color:var(--accent); box-shadow:0 0 0 3px rgba(212,168,67,0.15); }
.contact-form textarea { min-height:120px; resize:vertical; }

.footer { background:var(--white); border-top:1px solid var(--border); padding:50px 0 20px; margin-top:40px; }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1.5fr; gap:40px; margin-bottom:40px; }
.footer h4 { font-size:1.1rem; font-weight:700; margin-bottom:16px; color:var(--primary); }
.footer p { font-size:0.85rem; color:var(--text-gray); line-height:1.7; }
.footer-links { list-style:none; }
.footer-links li { margin-bottom:10px; }
.footer-links a { font-size:0.85rem; color:var(--text-gray); transition:var(--transition); display:inline-flex; align-items:center; gap:6px; }
.footer-links a:hover { color:var(--accent); transform:translateX(4px); }
.footer-contact-item { display:flex; align-items:flex-start; gap:10px; margin-bottom:12px; font-size:0.85rem; color:var(--text-gray); }
.footer-bottom { border-top:1px solid var(--border); padding-top:20px; text-align:center; font-size:0.8rem; color:var(--text-gray); display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:10px; }
.footer-bottom a { color:var(--text-gray); text-decoration:underline; }
.footer-bottom a:hover { color:var(--accent); }

/* 响应式 */
@media (max-width:1024px) {
    .hero h1 { font-size:2.4rem; }
    .footer-grid { grid-template-columns:1fr 1fr; }
    .contact-grid { grid-template-columns:1fr; }
}
@media (max-width:768px) {
    .top-bar-inner { padding:10px 16px; flex-wrap:nowrap; }
    .logo { font-size:1.3rem; }
    .logo-icon { width:36px; height:36px; font-size:1.1rem; }
    .main-nav { display:none; position:absolute; top:100%; left:0; right:0; background:var(--white); flex-direction:column; padding:16px; box-shadow:0 10px 30px rgba(0,0,0,0.1); border-bottom:2px solid var(--border); gap:4px; z-index:1000; }
    .main-nav.open { display:flex; }
    .main-nav a { padding:14px 16px; font-size:1rem; width:100%; text-align:center; border-radius:var(--radius-sm); }
    .main-nav a::after { display:none; }
    .hamburger { display:flex; }
    .top-actions { display:none; }
    .mobile-bottom-bar { display:flex; }
    body { padding-bottom:70px; }
    .hero { padding:50px 0 70px; }
    .hero h1 { font-size:2rem; }
    .hero-stats { gap:20px; margin-top:30px; }
    .hero-stat .number { font-size:1.6rem; }
    .section { padding:50px 0; }
    .section-header h2 { font-size:1.7rem; }
    .card-grid, .news-list, .download-cards { grid-template-columns:1fr; }
    .footer-grid { grid-template-columns:1fr; gap:24px; }
    .footer-bottom { flex-direction:column; text-align:center; gap:8px; }
    .product-table-wrapper { overflow-x:auto; }
    .product-table { min-width:600px; font-size:0.8rem; }
    .product-table th, .product-table td { padding:10px 12px; }
}
@media (max-width:480px) {
    .hero h1 { font-size:1.6rem; }
    .hero p { font-size:0.95rem; }
    .hero-buttons .btn { padding:12px 20px; font-size:0.9rem; }
    .mobile-bottom-bar { padding:8px 10px; gap:8px; }
    .mobile-bottom-bar .btn { padding:12px 10px; font-size:0.85rem; }
    .section-header h2 { font-size:1.4rem; }
}
/* 动画 */
@keyframes fadeInUp { from { opacity:0; transform:translateY(20px); } to { opacity:1; transform:translateY(0); } }
.animate-fade-in { animation:fadeInUp 0.6s ease forwards; }
.animate-delay-1 { animation-delay:0.1s; }
.animate-delay-2 { animation-delay:0.2s; }
.animate-delay-3 { animation-delay:0.3s; }
.animate-delay-4 { animation-delay:0.4s; }