/* =========================================
           3. 页面主体内容 (Page Content)
           ========================================= */
.page-wrapper { padding-top: 70px; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Hero */
.equip-hero {
    background: linear-gradient(rgba(26, 58, 89, 0.9), rgba(61, 125, 86, 0.8)),
    url('https://images.unsplash.com/photo-1581091226825-a6a2a5aee158?q=80&w=2670&auto=format&fit=crop');
    background-size: cover; background-position: center;
    height: 450px; color: white; display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center;
}
.hero-tag { background: var(--accent-gold); color: var(--primary-blue); padding: 4px 12px; border-radius: 20px; font-weight: bold; font-size: 0.8rem; text-transform: uppercase; margin-bottom: 20px; letter-spacing: 2px; }
.equip-hero h1 { font-family: "Times New Roman", serif; font-size: 3rem; margin-bottom: 15px; font-weight: bold; }
.equip-hero p { font-size: 1.1rem; max-width: 700px; opacity: 0.95; line-height: 1.8; }

/* 1. 演变之路 (Evolution Timeline) */
.evolution-section { background: white; padding: 80px 20px; }
.section-head { text-align: center; margin-bottom: 60px; }
.section-title { font-size: 2rem; color: var(--primary-blue); font-weight: bold; margin-bottom: 10px; font-family: "Times New Roman", serif; }
.section-sub { color: #666; text-transform: uppercase; letter-spacing: 1px; font-size: 0.9rem; }

.evo-container {
    display: flex; justify-content: space-between; align-items: flex-start;
    max-width: 1100px; margin: 0 auto; position: relative;
}
.evo-container::before {
    content: ''; position: absolute; top: 40px; left: 5%; width: 90%; height: 2px;
    background: linear-gradient(to right, #ccc 0%, var(--primary-green) 100%); z-index: 0;
}

.evo-step {
    position: relative; z-index: 1; text-align: center; width: 22%;
    background: white; padding-top: 10px; transition: 0.3s;
}
.evo-step:hover { transform: translateY(-10px); }

.evo-icon-box {
    width: 80px; height: 80px; background: white; border: 2px solid #eee; border-radius: 50%;
    margin: 0 auto 20px; display: flex; align-items: center; justify-content: center;
    font-size: 2rem; color: #666; box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: 0.3s;
}
.evo-step:hover .evo-icon-box { border-color: var(--primary-green); color: var(--primary-green); box-shadow: 0 10px 20px rgba(61, 125, 86, 0.2); }

.evo-stage { font-size: 0.8rem; color: var(--accent-gold); text-transform: uppercase; font-weight: bold; letter-spacing: 1px; margin-bottom: 5px; display: block; }
.evo-title { font-size: 1.2rem; font-weight: bold; color: var(--primary-blue); margin-bottom: 10px; }
.evo-desc { font-size: 0.9rem; color: #777; line-height: 1.5; }

/* 2. 传统器具与创新展示 */
.archive-display-section { background: #FAFBFC; padding: 80px 20px; border-top: 1px solid #eee; }

/* 分类导航 */
.category-nav { text-align: center; margin-bottom: 50px; }
.cat-btn {
    display: inline-block; padding: 10px 30px; margin: 0 5px; border-radius: 30px;
    font-weight: bold; color: #666; cursor: pointer; transition: 0.3s; border: 1px solid transparent;
}
.cat-btn:hover { color: var(--primary-blue); background: white; box-shadow: 0 2px 10px rgba(0,0,0,0.05); }
.cat-btn.active { background: var(--primary-blue); color: white; box-shadow: 0 5px 15px rgba(26, 58, 89, 0.2); }

.equip-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; max-width: 1200px; margin: 0 auto; }

.equip-card {
    background: white; border-radius: 12px; overflow: hidden; border: 1px solid #eee; transition: 0.3s;
    display: flex; flex-direction: column; position: relative;
}
.equip-card:hover { transform: translateY(-5px); box-shadow: var(--card-shadow); border-color: var(--primary-green); }

.card-visual {
    height: 240px; background: #f4f4f4; position: relative; display: flex; align-items: center; justify-content: center;
    overflow: hidden; color: #999; font-size: 4rem;
}
.card-badge {
    position: absolute; top: 15px; left: 15px; font-size: 0.75rem; padding: 4px 10px; border-radius: 4px;
    font-weight: bold; text-transform: uppercase; color: white; letter-spacing: 1px; z-index: 2;
}

/* 颜色定义 */
.bg-history { background: #8B4513; } /* 传统 */
.bg-tech { background: var(--primary-blue); } /* 现代 */
.bg-concept { background: var(--primary-green); } /* 未来 */

.card-body { padding: 25px; flex-grow: 1; display: flex; flex-direction: column; }
.card-meta { font-size: 0.8rem; color: #999; margin-bottom: 8px; font-family: monospace; }
.card-name { font-size: 1.3rem; font-weight: bold; color: var(--primary-blue); margin-bottom: 15px; line-height: 1.3; }
.card-desc { font-size: 0.9rem; color: #666; line-height: 1.6; margin-bottom: 20px; }

.tech-specs {
    margin-top: auto; padding-top: 15px; border-top: 1px dashed #eee;
    display: flex; justify-content: space-between; font-size: 0.85rem; color: #555;
}
/* 卡片头部 */
.card-header-img {
    height: 200px; background: #eee; display: flex; align-items: flex-end; justify-content: space-between;
    padding: 15px; position: relative; background-size: cover; background-position: center;
}
/* Submission */
.submit-banner { background: white; padding: 60px 20px; text-align: center; border-top: 1px solid #eee; }
.submit-title { color: var(--primary-blue); font-size: 1.8rem; margin-bottom: 10px; font-weight: bold; }
.btn-submit {
    background: var(--accent-gold); color: var(--primary-blue); padding: 12px 40px; border-radius: 30px;
    font-weight: bold; margin-top: 20px; display: inline-block; transition: 0.3s;
}
.btn-submit:hover { background: white; border: 1px solid var(--accent-gold); }

.fade-in { animation: fadeIn 0.6s ease-in-out; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.hidden { display: none; }

@media (max-width: 1024px) {
    .equip-grid { grid-template-columns: repeat(2, 1fr); }
    .evo-container::before { display: none; }
    .evo-container { flex-wrap: wrap; justify-content: center; gap: 30px; }
    .evo-step { width: 45%; margin-bottom: 20px; }
}
@media (max-width: 768px) {
    .equip-hero h1 { font-size: 2rem; }
    .equip-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; text-align: center; }
}