/* ==========================================================================
   关于我们 (About Us) 专属样式
   ========================================================================== */

/* 覆盖默认的页面入场和离场 */
@keyframes pageDepthFadeIn {
    from { transform: scale(1.05); opacity: 0; filter: blur(10px); }
    to { transform: scale(1); opacity: 1; filter: blur(0px); }
}

body.moonshot-theme {
    animation: pageDepthFadeIn 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0;
    text-decoration: none;
}
.logo-img {
    height: 44px;
    width: auto;
    position: relative;
    z-index: 2;
    mix-blend-mode: screen;
}
.logo-text {
    color: #fff;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 1px;
    position: relative;
    z-index: 1;
    margin-left: -8px;
    transform: skewX(-12deg);
}

.about-main {
    padding-top: 100px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* ==========================================================================
   1. 头部 Hero 区
   ========================================================================== */
.about-hero {
    position: relative;
    width: 100%;
    height: 70vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

.about-ambient-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.15) 0%, rgba(118, 75, 162, 0.1) 30%, transparent 70%);
    filter: blur(60px);
    z-index: -1;
    pointer-events: none;
}

.about-title {
    font-size: 64px;
    font-weight: 700;
    line-height: 1.2;
    margin: 0 0 24px 0;
    background: linear-gradient(180deg, #fff 0%, rgba(255, 255, 255, 0.6) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
    animation: fadeUp 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.about-subtitle {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.6);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
    opacity: 0;
    animation: fadeUp 1s cubic-bezier(0.16, 1, 0.3, 1) 0.2s forwards;
}

/* ==========================================================================
   2. 核心使命区 (玻璃卡片错落)
   ========================================================================== */
.about-mission {
    width: 100%;
    max-width: 1200px;
    padding: 60px 40px;
    z-index: 10;
}

.mission-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 32px;
}

.glass-panel {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 24px;
    padding: 48px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
}

.glass-panel::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 50%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.04), transparent);
    transform: skewX(-20deg);
    transition: 0.7s ease-in-out;
    pointer-events: none;
}

.glass-panel:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 24px 80px rgba(0,0,0,0.4), inset 0 1px 0 rgba(255,255,255,0.1);
}

.glass-panel:hover::before {
    left: 200%;
}

.mission-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.glass-panel h3 {
    font-size: 28px;
    margin: 0 0 16px 0;
    color: #fff;
}

.glass-panel p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.7;
    margin: 0;
}

/* ==========================================================================
   3. 视差滚动时间线 (Timeline)
   ========================================================================== */
.about-timeline-section {
    position: relative;
    width: 100%;
    height: 300vh; /* 提供足够的滚动空间 */
}

.timeline-sticky-container {
    position: sticky;
    top: 0;
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.timeline-line {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, transparent, rgba(255,255,255,0.1) 20%, rgba(255,255,255,0.1) 80%, transparent);
    transform: translateX(-50%);
    z-index: 1;
}

.timeline-step {
    position: absolute;
    width: 100%;
    max-width: 600px;
    text-align: center;
    padding: 0 40px;
    opacity: 0;
    transform: translateY(100px) scale(0.9);
    filter: blur(10px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 2;
}

.year-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 99px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 1px;
    color: #fff;
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}

.timeline-step h2 {
    font-size: 48px;
    margin: 0 0 20px 0;
    background: linear-gradient(135deg, #fff 0%, #888 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.timeline-step p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.6;
}

/* ==========================================================================
   4. 底部 CTA
   ========================================================================== */
.about-cta {
    width: 100%;
    padding: 120px 20px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 10;
    background: radial-gradient(circle at center bottom, rgba(255,255,255,0.03) 0%, transparent 50%);
}

.about-cta h2 {
    font-size: 36px;
    margin: 0 0 40px 0;
    color: #fff;
}

@media (max-width: 768px) {
    .about-title { font-size: 40px; }
    .timeline-step h2 { font-size: 32px; }
    .glass-panel { padding: 32px; }
    .about-subtitle { font-size: 17px; }
    .about-hero { height: 60vh; }
    .timeline-step { padding: 0 24px; }
    .about-cta { padding: 80px 20px; box-sizing: border-box !important; }
    .about-cta h2 { font-size: 28px; }
    .mission-container {
        grid-template-columns: 1fr;
    }
    .about-mission { box-sizing: border-box !important; padding: 40px 16px; }
    .about-main { overflow-x: hidden; }
}

@media (max-width: 480px) {
    .about-title { font-size: 30px; }
    .about-subtitle { font-size: 15px; }
    .timeline-step { padding: 0 16px; }
    .timeline-step h2 { font-size: 24px; }
    .timeline-step p { font-size: 15px; }
    .glass-panel { padding: 24px 20px; }
    .glass-panel h3 { font-size: 22px; }
    .about-cta h2 { font-size: 24px; }
    .about-cta { padding: 60px 16px; box-sizing: border-box !important; }
    .about-mission { padding: 32px 14px; }
}