:root {
        --bg-color: #F5F0E6;
        --text-main: #2C2A28;
        --text-light: #5C5855;
        --accent: #E55938;
        --accent-hover: #C84524;
        --card-bg: #FFFFFF;
        --border-color: #E3DCD0;
    }
    * {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    body {
        font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
        background-color: var(--bg-color);
        color: var(--text-main);
        line-height: 1.6;
        overflow-x: hidden;
    }
    a {
        text-decoration: none;
        color: inherit;
    }
    .container {
        width: 100%;
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 20px;
    }
    
    /* Top Nav */
    .top-nav {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        background-color: rgba(245, 240, 230, 0.95);
        backdrop-filter: blur(10px);
        border-bottom: 1px solid var(--border-color);
        z-index: 1000;
    }
    .nav-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 64px;
    }
    .brand {
        display: flex;
        align-items: center;
        gap: 10px;
        font-weight: 800;
        font-size: 20px;
    }
    .brand img {
        height: 32px;
        border-radius: 4px;
    }
    .nav-links {
        display: none;
        gap: 20px;
        overflow-x: auto;
        white-space: nowrap;
    }
    .nav-links a {
        font-size: 15px;
        font-weight: 600;
        color: var(--text-main);
        transition: color 0.2s;
    }
    .nav-links a:hover {
        color: var(--accent);
    }

    /* Hero Section */
    .hero {
        position: relative;
        padding: 120px 0 80px;
        min-height: 80vh;
        display: flex;
        align-items: center;
        overflow: hidden;
    }
    .planet-bg {
        position: absolute;
        top: -20%;
        right: -20%;
        width: 800px;
        height: 800px;
        border-radius: 50%;
        background: radial-gradient(circle at 30% 30%, #E8DCC8, #CFBFA6);
        box-shadow: inset -40px -40px 80px rgba(0,0,0,0.1);
        z-index: 0;
    }
    .planet-ring {
        position: absolute;
        top: 10%;
        right: -10%;
        width: 1000px;
        height: 200px;
        border: 40px solid rgba(229, 89, 56, 0.4);
        border-radius: 50%;
        transform: rotate(-20deg);
        z-index: 0;
        pointer-events: none;
    }
    .hero-content {
        position: relative;
        z-index: 2;
        max-width: 700px;
    }
    .hero h1 {
        font-size: 48px;
        font-weight: 900;
        font-style: italic;
        line-height: 1.1;
        margin-bottom: 24px;
        color: var(--text-main);
        text-transform: uppercase;
        letter-spacing: 2px;
    }
    .hero h1 span {
        color: var(--accent);
    }
    .hero p {
        font-size: 18px;
        color: var(--text-light);
        margin-bottom: 40px;
        max-width: 500px;
    }
    .download-group {
        display: flex;
        flex-wrap: wrap;
        gap: 16px;
    }
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 14px 32px;
        font-size: 16px;
        font-weight: 700;
        border-radius: 30px;
        cursor: pointer;
        transition: all 0.3s;
        border: none;
        font-style: italic;
    }
    .btn-primary {
        background-color: var(--accent);
        color: #fff;
        box-shadow: 0 4px 12px rgba(229, 89, 56, 0.3);
    }
    .btn-primary:hover {
        background-color: var(--accent-hover);
        transform: translateY(-2px);
    }
    .btn-outline {
        background-color: transparent;
        color: var(--accent);
        border: 2px solid var(--accent);
    }
    .btn-outline:hover {
        background-color: var(--accent);
        color: #fff;
    }
    .astronaut {
        position: absolute;
        bottom: 10%;
        right: 15%;
        width: 120px;
        z-index: 1;
        animation: float 6s ease-in-out infinite;
    }
    @keyframes float {
        0% { transform: translateY(0); }
        50% { transform: translateY(-20px); }
        100% { transform: translateY(0); }
    }

    /* Common Section */
    section {
        padding: 80px 0;
        position: relative;
        z-index: 2;
    }
    .section-header {
        margin-bottom: 40px;
        text-align: center;
    }
    .section-header h2 {
        font-size: 32px;
        font-weight: 800;
        font-style: italic;
        color: var(--text-main);
        margin-bottom: 12px;
    }
    .section-header h2::after {
        content: '';
        display: block;
        width: 60px;
        height: 4px;
        background-color: var(--accent);
        margin: 16px auto 0;
    }

    /* Today Update */
    .grid-3 {
        display: grid;
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .card {
        background: var(--card-bg);
        border-radius: 12px;
        overflow: hidden;
        box-shadow: 0 4px 16px rgba(0,0,0,0.04);
        transition: transform 0.3s;
    }
    .card:hover {
        transform: translateY(-5px);
    }
    .card-img {
        width: 100%;
        aspect-ratio: 3/4;
        object-fit: cover;
    }
    .card-content {
        padding: 20px;
    }
    .card-content h3 {
        font-size: 20px;
        font-weight: 700;
        margin-bottom: 8px;
    }
    .card-content p {
        font-size: 14px;
        color: var(--text-light);
    }

    /* Online Tracking */
    .split-layout {
        display: flex;
        flex-direction: column;
        gap: 40px;
        align-items: center;
    }
    .split-text {
        flex: 1;
    }
    .split-text h2 {
        font-size: 36px;
        font-weight: 800;
        font-style: italic;
        margin-bottom: 20px;
    }
    .split-text p {
        font-size: 16px;
        color: var(--text-light);
        margin-bottom: 20px;
    }
    .split-img-wrap {
        flex: 1;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }
    .split-img-wrap img {
        width: 100%;
        border-radius: 12px;
        aspect-ratio: 3/4;
        object-fit: cover;
    }

    /* AI Magic */
    .ai-section {
        background-color: #EBE3D5;
    }
    .grid-4 {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }
    .square-card {
        position: relative;
        border-radius: 12px;
        overflow: hidden;
        aspect-ratio: 1/1;
    }
    .square-card img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
    .square-card h3 {
        position: absolute;
        bottom: 0;
        left: 0;
        width: 100%;
        padding: 16px;
        background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
        color: #fff;
        font-size: 18px;
        font-style: italic;
    }

    /* Ranking */
    .list-card {
        display: flex;
        gap: 16px;
        background: var(--card-bg);
        padding: 16px;
        border-radius: 12px;
        margin-bottom: 16px;
        align-items: center;
    }
    .list-card img {
        width: 80px;
        height: 106px;
        object-fit: cover;
        border-radius: 8px;
    }
    .list-info h3 {
        font-size: 18px;
        margin-bottom: 6px;
    }
    .list-info p {
        font-size: 14px;
        color: var(--text-light);
    }

    /* Comments */
    .comment-box {
        background: var(--card-bg);
        padding: 24px;
        border-radius: 12px;
        margin-bottom: 16px;
    }
    .comment-user {
        font-weight: 700;
        color: var(--accent);
        font-size: 14px;
        margin-bottom: 8px;
    }
    .comment-text {
        font-size: 15px;
        line-height: 1.5;
    }

    /* Guide */
    .guide-steps {
        display: flex;
        flex-direction: column;
        gap: 24px;
    }
    .step {
        display: flex;
        gap: 16px;
        align-items: flex-start;
    }
    .step-num {
        width: 32px;
        height: 32px;
        background: var(--accent);
        color: #fff;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: 700;
        flex-shrink: 0;
    }
    .step h3 {
        font-size: 18px;
        margin-bottom: 4px;
    }
    .step p {
        font-size: 15px;
        color: var(--text-light);
    }

    /* Footer */
    footer {
        background-color: #1E1B18;
        color: #A19B93;
        padding: 40px 0;
        text-align: center;
        font-size: 12px;
    }
    footer p {
        margin-bottom: 12px;
    }
    footer a {
        color: #A19B93;
        transition: color 0.2s;
    }
    footer a:hover {
        color: #fff;
    }

    /* Modal */
    .modal-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0,0,0,0.6);
        display: none;
        align-items: center;
        justify-content: center;
        z-index: 2000;
    }
    .modal-overlay.active {
        display: flex;
    }
    .modal-content {
        background: #fff;
        padding: 32px 24px;
        border-radius: 16px;
        width: 90%;
        max-width: 400px;
        text-align: center;
    }
    .modal-content p {
        font-size: 16px;
        margin-bottom: 20px;
        color: var(--text-main);
        font-weight: 600;
    }
    .copy-input {
        width: 100%;
        padding: 12px;
        border: 1px solid var(--border-color);
        border-radius: 8px;
        margin-bottom: 16px;
        font-size: 14px;
        color: var(--text-light);
        background: var(--bg-color);
        text-align: center;
    }
    .modal-btn {
        background: var(--accent);
        color: #fff;
        border: none;
        border-radius: 8px;
        padding: 12px 24px;
        font-size: 16px;
        font-weight: 600;
        cursor: pointer;
        width: 100%;
    }

    /* Responsive */
    @media (min-width: 768px) {
        .nav-links {
            display: flex;
        }
        .grid-3 {
            grid-template-columns: repeat(3, 1fr);
        }
        .split-layout {
            flex-direction: row;
        }
        .grid-4 {
            grid-template-columns: repeat(4, 1fr);
        }
        .hero h1 {
            font-size: 64px;
        }
        .hero p {
            font-size: 20px;
        }
    }
    @media (min-width: 1024px) {
        .hero {
            padding: 160px 0 100px;
        }
        .hero h1 {
            font-size: 80px;
        }
        .planet-bg {
            right: 5%;
        }
        .planet-ring {
            right: 0;
        }
    }