/* === Frutiger Aero & Modern Glass 深度视觉升级 === */
:root {
    --bg-gradient: linear-gradient(135deg, #1e528e 0%, #72b0d3 50%, #9dd1ef 100%);
    --glass-bg: rgba(255, 255, 255, 0.22);
    --glass-border: 1px solid rgba(255, 255, 255, 0.5);
    --glass-shadow:
        0 8px 32px rgba(0, 0, 0, 0.15),
        inset 0 0 1px 1px rgba(255, 255, 255, 0.3);
    --text-primary: #1e395b;
    --font-heading: 'Montserrat', 'Segoe UI', sans-serif;
    --font-body: 'Outfit', 'Segoe UI', sans-serif;
    --win7-ease: cubic-bezier(0.19, 1, 0.22, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-body);
}

body {
    background: var(--bg-gradient);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

.aero-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 50%, rgba(255,255,255,0.08) 0%, transparent 80%);
    pointer-events: none;
    z-index: 1;
}

/* === Navbar === */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 8%;
    background: linear-gradient(180deg, rgba(255,255,255,0.5) 0%, rgba(255,255,255,0.2) 100%);
    border-bottom: 1px solid rgba(255,255,255,0.4);
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.8rem;
    font-family: var(--font-heading);
    font-weight: 700;
    color: #1e4d8e;
    text-shadow: 0 1px 2px rgba(255,255,255,0.8);
    transition: all 0.3s var(--win7-ease);
}

.win-logo-sharp {
    filter: drop-shadow(0 1px 2px rgba(0,0,0,0.15));
    transition: transform 0.4s var(--win7-ease);
}

.logo:hover .win-logo-sharp {
    transform: rotate(10deg) scale(1.15);
}

.nav-links {
    display: flex;
    gap: 12px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 600;
    padding: 8px 20px;
    border-radius: 50px;
    border: 1px solid transparent;
    transition: all 0.3s var(--win7-ease);
    font-size: 0.95rem;
}

.nav-links a:hover, .nav-links a.active {
    background: rgba(255,255,255,0.4);
    border-color: rgba(255,255,255,0.6);
    box-shadow: 0 4px 10px rgba(0,0,0,0.05), inset 0 1px 0 rgba(255,255,255,0.8);
    transform: translateY(-2px);
}

/* === Hamburger === */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: #1e4d8e;
    border-radius: 2px;
    transition: all 0.3s var(--win7-ease);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* === Hero === */
.hero {
    text-align: center;
    padding: 5rem 1rem;
    color: #fff;
    position: relative;
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: 4.2rem;
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -1.5px;
    background: linear-gradient(to bottom, #fff 40%, #cbe8ff 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 5px 15px rgba(0,0,0,0.25));
}

.hero p {
    font-size: 1.25rem;
    opacity: 0.9;
    font-weight: 400;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

/* === Controls === */
.controls-container {
    max-width: 1200px;
    margin: -2rem auto 3rem auto;
    padding: 20px 30px;
    background: var(--glass-bg);
    border: var(--glass-border);
    border-radius: 20px;
    box-shadow: var(--glass-shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    z-index: 10;
    position: relative;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.filter-group i {
    color: #3c7fb1;
}

.filter-group select {
    padding: 8px 16px;
    border-radius: 10px;
    border: 1px solid rgba(255,255,255,0.5);
    background: rgba(255,255,255,0.6);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
}

.filter-group select:hover {
    background: rgba(255,255,255,0.8);
}

.search-group {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: 12px;
    padding: 2px 15px;
    transition: all 0.3s;
    flex: 0.6;
}

.search-group:focus-within {
    background: rgba(255, 255, 255, 0.8);
    box-shadow: 0 0 10px rgba(0, 120, 212, 0.2), inset 0 1px 0 #fff;
    border-color: #3c7fb1;
}

.search-group i {
    color: #3c7fb1;
}

.search-group input {
    background: transparent;
    border: none;
    outline: none;
    width: 100%;
    padding: 8px 0;
    color: var(--text-primary);
    font-weight: 600;
}

.search-group input::placeholder {
    color: #888;
    font-weight: 400;
}

.result-count {
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
}

/* === Gallery === */
.gallery-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px 6rem 20px;
}

.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 40px;
}

.no-results {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    color: rgba(255,255,255,0.6);
    font-size: 1.2rem;
    gap: 15px;
}

/* === Card === */
.card {
    background: var(--glass-bg);
    border: var(--glass-border);
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    transition: all 0.5s var(--win7-ease);
    cursor: pointer;
    position: relative;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.card:hover {
    transform: translateY(-15px) rotateX(2deg);
    box-shadow: 0 25px 50px rgba(0,0,0,0.25), 0 0 20px rgba(255,255,255,0.2);
    border-color: rgba(255,255,255,0.8);
}

.card-img-wrapper {
    width: 100%;
    aspect-ratio: 16/10;
    overflow: hidden;
    position: relative;
    background: #000;
}

.card-img-wrapper::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 40%, rgba(255,255,255,0.1) 100%);
    transform: rotate(30deg);
    pointer-events: none;
    transition: 0.5s;
}

.card:hover .card-img-wrapper::after {
    transform: rotate(30deg) translate(20%, 20%);
}

.card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s var(--win7-ease);
}

.card:hover img {
    transform: scale(1.1);
}

.res-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: rgba(0, 0, 0, 0.4);
    color: #fff;
    padding: 5px 12px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255,255,255,0.2);
    z-index: 3;
}

.card-info {
    padding: 20px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.5) 0%, rgba(255,255,255,0.3) 100%);
    border-top: 1px solid rgba(255,255,255,0.3);
}

.card-title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    color: #222;
    margin-bottom: 8px;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-primary);
    font-size: 0.85rem;
}

.tag {
    background: rgba(30, 82, 142, 0.1);
    color: #1e528e;
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 700;
    border: 1px solid rgba(30, 82, 142, 0.2);
}

/* === Modal (FLIP Animation) === */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.85);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.modal.active { opacity: 1; }

.modal-content {
    max-width: 85%;
    max-height: 75vh;
    border-radius: 16px;
    box-shadow: 0 0 100px rgba(0, 120, 212, 0.3);
    border: 1px solid rgba(255,255,255,0.3);
    object-fit: contain;
    transform-origin: top left;
}

.close-btn {
    position: fixed;
    top: 30px;
    right: 40px;
    color: #fff;
    font-size: 3rem;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity 0.3s;
    z-index: 2001;
    line-height: 1;
}

.close-btn:hover { opacity: 1; }

.caption {
    color: #fff;
    padding: 20px;
    font-size: 1rem;
    text-align: center;
    text-shadow: 0 2px 8px rgba(0,0,0,0.5);
}

.download-btn {
    background: var(--glass-bg);
    border: var(--glass-border);
    color: #fff;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 10px;
}

.download-btn:hover {
    background: rgba(255,255,255,0.35);
    transform: translateY(-2px);
}

/* === Footer === */
.aero-footer {
    background: rgba(255, 255, 255, 0.1);
    border-top: 1px solid rgba(255,255,255,0.2);
    padding: 5rem 5% 2rem;
    color: #fff;
    margin-top: 4rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.footer-section p {
    opacity: 0.8;
    line-height: 1.6;
}

.logo-mini {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.9rem;
    opacity: 0.8;
}

.social-links {
    display: flex;
    gap: 20px;
}

.social-links a {
    color: #fff;
    font-size: 1.5rem;
    transition: transform 0.3s;
}

.social-links a:hover { transform: translateY(-5px); }

/* === Mobile === */
@media (max-width: 768px) {
    .hamburger { display: flex; }

    .nav-links {
        display: flex !important;
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        max-width: 300px;
        height: 100vh;
        background: rgba(255,255,255,0.95);
        backdrop-filter: blur(25px);
        flex-direction: column;
        padding: 80px 30px 30px;
        gap: 8px;
        box-shadow: -5px 0 30px rgba(0,0,0,0.2);
        transition: right 0.35s var(--win7-ease);
        z-index: 1000;
    }

    .nav-links.open { right: 0; }

    .nav-links a {
        font-size: 1.1rem;
        padding: 12px 20px;
        border-radius: 14px;
    }

    .hero { padding: 3rem 1rem; }
    .hero h1 { font-size: 2.8rem; }

    .controls-container {
        flex-direction: column;
        gap: 15px;
        margin: 0 20px 20px;
        align-items: stretch;
    }
    .search-group { flex: 1; }
    .result-count { text-align: center; }

    .gallery { grid-template-columns: 1fr; gap: 25px; }

    .modal-content { max-width: 95%; max-height: 60vh; }
    .close-btn { top: 20px; right: 20px; font-size: 2.5rem; }

    .footer-bottom { flex-direction: column; gap: 20px; text-align: center; }
}

/* === Animations === */
.fade-in-up {
    animation: fadeInUp 0.8s var(--win7-ease) both;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}