@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root { --gold: #C59A1A; --bg-main: #0A0B0C; --bg-card: #15171A; --line: #272A2D; --text-main: #FFFFFF; --text-secondary: #989BA3; --shadow: 0 4px 20px rgba(0,0,0,0.6); }
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Inter', sans-serif; background: var(--bg-main); color: var(--text-main); line-height: 1.5; -webkit-font-smoothing: antialiased; }
a { text-decoration: none; color: inherit; }
.container { width: 90%; max-width: 1300px; margin: 0 auto; padding: 60px 0; }

.navbar { background: #000000; border-bottom: 2px solid var(--gold); padding: 16px 0; position: sticky; top: 0; z-index: 100; }
.navbar .container { display: flex; justify-content: space-between; align-items: center; padding: 0; }
.navbar .brand { font-size: 20px; font-weight: 700; color: #fff; }
.navbar .brand span { color: var(--gold); }
.navbar .menu { display: flex; gap: 30px; align-items: center; }
.navbar .menu a { color: #989BA3; font-size: 14px; font-weight: 500; transition: 0.25s ease; }
.navbar .menu a:hover, .navbar .menu a.active { color: var(--gold); }

/* ⚠️ 终极修复区域：彻底消除菜单悬浮的缝隙和闪烁 */
.dropdown { position: relative; display: inline-block; }
/* 重点：把保护垫向下延伸25px，鼠标滑过这里时，绝不可能触发“离开”状态 */
.dropdown-content { 
    position: absolute; background-color: #000; min-width: 160px; box-shadow: 0 8px 16px rgba(0,0,0,0.6); z-index: 1000; border: 1px solid var(--line); border-top: 2px solid var(--gold); 
    top: 100%; left: 0; border-radius: 4px; overflow: hidden;
    /* 用透明度和可见性替代 display:none，菜单不会瞬间消失，会稳稳地停留在原位 */
    opacity: 0; visibility: hidden; pointer-events: none; transition: opacity 0.2s ease, visibility 0.2s;
}
.dropdown-content a { color: #fff; padding: 12px 16px; text-decoration: none; display: block; width: 100%; font-size: 14px; text-align: left; border-bottom: 1px solid var(--line); cursor: pointer; pointer-events: auto; position: relative; z-index: 1001; }
.dropdown-content a:last-child { border-bottom: none; }
.dropdown-content a:hover { background-color: #15171A; color: var(--gold); }
.dropdown:hover .dropdown-content { opacity: 1; visibility: visible; pointer-events: auto; }

.page-header { background: #000; border-bottom: 2px solid var(--gold); padding: 50px 0; margin-bottom: 30px; text-align: center; }
.page-header h1 { font-size: 36px; font-weight: 500; color: #fff; }
.page-header p { color: var(--text-secondary); font-size: 16px; margin-top: 10px; font-weight: 300; }

.main-content { padding: 60px 0; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
.large-image { aspect-ratio: 4 / 3; width: 100%; object-fit: cover; border-radius: 12px; box-shadow: var(--shadow); }

.pic-card { background: var(--bg-card); padding: 20px; border-radius: 12px; box-shadow: var(--shadow); transition: 0.3s; border: 1px solid transparent; }
.pic-card:hover { border-color: var(--gold); transform: translateY(-4px); }
.pic-card .card-img { width: 100%; height: 200px; object-fit: cover; border-radius: 8px; margin-bottom: 15px; }
.pic-card h4 { font-size: 18px; color: #fff; font-weight: 600; margin-bottom: 6px; }
.pic-card p { color: var(--text-secondary); font-size: 14px; line-height: 1.6; }

.btn { display: inline-block; background: var(--gold); color: #000 !important; padding: 12px 28px; border-radius: 4px; font-weight: 600; border: 1px solid var(--gold); }
.btn:hover { background: #fff; color: #000 !important; border-color: #fff; }
.btn-outline { background: transparent !important; color: var(--gold) !important; border: 1px solid var(--line); }
.btn-outline:hover { background: var(--gold) !important; color: #000 !important; }

.brand-section { background: #080808; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 30px 0; }
.brand-logos { display: flex; justify-content: center; gap: 50px; flex-wrap: wrap; }
.brand-logos span { color: #555; font-size: 16px; font-weight: 500; }
.brand-logos span:hover { color: var(--gold); }

.footer { background: #000000; border-top: 2px solid var(--gold); padding: 40px 0; margin-top: 40px; }
.footer .container { display: flex; justify-content: space-between; align-items: center; padding: 0; flex-wrap: wrap; }
.footer p, .footer a { color: #6B6E76; font-size: 13px; }
.footer a:hover { color: var(--gold); }
@media (max-width: 992px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; gap: 30px; } .pic-card .card-img { height: 160px; } }