:root {
    --primary: #6c5ce7;
    --primary-dark: #4834d4;
    --primary-light: #a29bfe;
    --accent: #fd79a8;
    --accent-dark: #e84393;
    --bg: #f0f2f5;
    --bg-card: rgba(255, 255, 255, 0.72);
    --bg-card-hover: rgba(255, 255, 255, 0.92);
    --bg-glass: rgba(255, 255, 255, 0.45);
    --text: #1a1a2e;
    --text-secondary: #4a4a6a;
    --text-muted: #8888a8;
    --border: rgba(108, 92, 231, 0.12);
    --border-hover: rgba(108, 92, 231, 0.3);
    --shadow: 0 4px 24px rgba(26, 26, 46, 0.07);
    --shadow-lg: 0 12px 48px rgba(26, 26, 46, 0.12);
    --shadow-hover: 0 16px 56px rgba(108, 92, 231, 0.18);
    --radius: 16px;
    --radius-sm: 10px;
    --radius-lg: 24px;
    --radius-full: 999px;
    --transition: 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
    --transition-fast: 0.2s ease;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    --max-width: 1200px;
    --header-height: 72px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0f0f1a;
        --bg-card: rgba(26, 26, 46, 0.72);
        --bg-card-hover: rgba(36, 36, 60, 0.92);
        --bg-glass: rgba(26, 26, 46, 0.5);
        --text: #e8e8f0;
        --text-secondary: #b0b0c8;
        --text-muted: #707090;
        --border: rgba(162, 155, 254, 0.1);
        --border-hover: rgba(162, 155, 254, 0.3);
        --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
        --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.45);
        --shadow-hover: 0 16px 56px rgba(108, 92, 231, 0.3);
    }
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + 20px);
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.75;
    font-size: 16px;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background var(--transition), color var(--transition);
}

body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse 80% 60% at 10% 20%, rgba(108, 92, 231, 0.08), transparent 60%),
        radial-gradient(ellipse 60% 50% at 90% 80%, rgba(253, 121, 168, 0.06), transparent 60%),
        radial-gradient(ellipse 50% 40% at 50% 50%, rgba(162, 155, 254, 0.04), transparent 60%);
    pointer-events: none;
    z-index: 0;
}

@media (prefers-color-scheme: dark) {
    body::before {
        background:
            radial-gradient(ellipse 80% 60% at 10% 20%, rgba(108, 92, 231, 0.12), transparent 60%),
            radial-gradient(ellipse 60% 50% at 90% 80%, rgba(253, 121, 168, 0.08), transparent 60%),
            radial-gradient(ellipse 50% 40% at 50% 50%, rgba(162, 155, 254, 0.06), transparent 60%);
    }
}

::selection {
    background: var(--primary);
    color: #fff;
}

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-light);
    border-radius: var(--radius-full);
    border: 2px solid var(--bg);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

header {
    position: relative;
    z-index: 10;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 30%, #0f3460 60%, #6c5ce7 100%);
    background-size: 300% 300%;
    animation: gradientShift 12s ease infinite;
    padding: 60px 24px 48px;
    color: #fff;
    overflow: hidden;
}

header::before {
    content: "";
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background:
        radial-gradient(circle at 20% 80%, rgba(253, 121, 168, 0.15), transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(162, 155, 254, 0.12), transparent 50%);
    animation: floatOrb 18s ease-in-out infinite;
    pointer-events: none;
}

header::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 80px;
    background: linear-gradient(to top, var(--bg), transparent);
    pointer-events: none;
    z-index: 2;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

@keyframes floatOrb {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(30px, -30px) rotate(120deg); }
    66% { transform: translate(-20px, 20px) rotate(240deg); }
}

header h1 {
    position: relative;
    z-index: 3;
    max-width: var(--max-width);
    margin: 0 auto 20px;
    font-size: clamp(1.5rem, 4vw, 2.4rem);
    font-weight: 800;
    line-height: 1.35;
    letter-spacing: -0.02em;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
    animation: fadeInUp 0.8s ease both;
}

header > p {
    position: relative;
    z-index: 3;
    max-width: var(--max-width);
    margin: 0 auto 32px;
    font-size: clamp(0.9rem, 1.8vw, 1.05rem);
    line-height: 1.85;
    color: rgba(255, 255, 255, 0.82);
    animation: fadeInUp 0.8s ease 0.15s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

header nav {
    position: relative;
    z-index: 3;
    max-width: var(--max-width);
    margin: 0 auto;
    animation: fadeInUp 0.8s ease 0.3s both;
}

header nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 0;
    margin: 0;
}

header nav ul li {
    flex: 0 0 auto;
}

header nav ul li a {
    display: inline-block;
    padding: 8px 18px;
    font-size: 0.88rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.88);
    text-decoration: none;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-full);
    transition: all var(--transition);
    white-space: nowrap;
}

header nav ul li a:hover {
    background: rgba(255, 255, 255, 0.22);
    border-color: rgba(255, 255, 255, 0.35);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
    color: #fff;
}

header nav ul li a:active {
    transform: translateY(0);
}

main {
    position: relative;
    z-index: 1;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px 60px;
}

main > section {
    margin-bottom: 32px;
    padding: 36px 32px;
    background: var(--bg-card);
    backdrop-filter: blur(20px) saturate(1.4);
    -webkit-backdrop-filter: blur(20px) saturate(1.4);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: all var(--transition);
    animation: fadeInUp 0.6s ease both;
}

main > section:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--border-hover);
}

main > section:nth-child(1) { animation-delay: 0.05s; }
main > section:nth-child(2) { animation-delay: 0.1s; }
main > section:nth-child(3) { animation-delay: 0.12s; }
main > section:nth-child(4) { animation-delay: 0.14s; }
main > section:nth-child(5) { animation-delay: 0.16s; }
main > section:nth-child(6) { animation-delay: 0.18s; }
main > section:nth-child(7) { animation-delay: 0.2s; }
main > section:nth-child(8) { animation-delay: 0.22s; }
main > section:nth-child(9) { animation-delay: 0.24s; }
main > section:nth-child(10) { animation-delay: 0.26s; }
main > section:nth-child(11) { animation-delay: 0.28s; }
main > section:nth-child(12) { animation-delay: 0.3s; }
main > section:nth-child(13) { animation-delay: 0.32s; }

main > section h2 {
    font-size: clamp(1.2rem, 2.5vw, 1.5rem);
    font-weight: 700;
    color: var(--text);
    margin-bottom: 20px;
    padding-bottom: 14px;
    border-bottom: 2px solid transparent;
    border-image: linear-gradient(90deg, var(--primary), var(--accent), transparent) 1;
    letter-spacing: -0.01em;
    position: relative;
}

main > section h2::before {
    content: "";
    display: inline-block;
    width: 4px;
    height: 1em;
    background: linear-gradient(180deg, var(--primary), var(--accent));
    border-radius: 2px;
    margin-right: 12px;
    vertical-align: middle;
    transform: translateY(-2px);
}

main > section h3 {
    font-size: clamp(1rem, 2vw, 1.15rem);
    font-weight: 600;
    color: var(--text);
    margin: 24px 0 12px;
    line-height: 1.5;
}

main > section h3:first-of-type {
    margin-top: 0;
}

main > section p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 14px;
}

main > section p:last-child {
    margin-bottom: 0;
}

main > section ul,
main > section ol {
    padding-left: 0;
    list-style: none;
    margin-bottom: 16px;
}

main > section ul li,
main > section ol li {
    position: relative;
    padding: 10px 0 10px 28px;
    font-size: 0.93rem;
    color: var(--text-secondary);
    line-height: 1.8;
    border-bottom: 1px solid var(--border);
    transition: all var(--transition-fast);
}

main > section ul li:last-child,
main > section ol li:last-child {
    border-bottom: none;
}

main > section ul li::before {
    content: "";
    position: absolute;
    left: 4px;
    top: 18px;
    width: 8px;
    height: 8px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 50%;
    transition: transform var(--transition);
}

main > section ul li:hover::before {
    transform: scale(1.5);
}

main > section ol {
    counter-reset: item;
}

main > section ol li {
    counter-increment: item;
    padding-left: 36px;
}

main > section ol li::before {
    content: counter(item);
    position: absolute;
    left: 0;
    top: 12px;
    width: 22px;
    height: 22px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

main > section ul li:hover,
main > section ol li:hover {
    color: var(--text);
    padding-left: 32px;
}

main > section a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: color var(--transition-fast);
}

main > section a::after {
    content: "";
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 1px;
    transition: width var(--transition);
}

main > section a:hover {
    color: var(--accent-dark);
}

main > section a:hover::after {
    width: 100%;
}

main > section article {
    padding: 24px;
    margin-bottom: 16px;
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

main > section article::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

main > section article:hover::before {
    transform: scaleX(1);
}

main > section article:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
}

main > section article:last-child {
    margin-bottom: 0;
}

main > section article h3 {
    font-size: 1.05rem;
    margin: 0 0 8px;
    transition: color var(--transition-fast);
}

main > section article:hover h3 {
    color: var(--primary);
}

main > section article p {
    font-size: 0.9rem;
}

main > section article p:first-of-type {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

main > section article p:first-of-type::before {
    content: "📅 ";
    font-size: 0.78rem;
}

main > section article a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--primary);
    padding: 6px 16px;
    background: rgba(108, 92, 231, 0.08);
    border-radius: var(--radius-full);
    transition: all var(--transition);
    margin-top: 4px;
}

main > section article a::after {
    display: none;
}

main > section article a::before {
    content: "→";
    transition: transform var(--transition);
}

main > section article a:hover {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 16px rgba(108, 92, 231, 0.35);
}

main > section article a:hover::before {
    transform: translateX(4px);
}

main > section#faq h3 {
    padding: 16px 20px;
    background: var(--bg-glass);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    margin: 20px 0 0;
    cursor: default;
    transition: all var(--transition-fast);
    position: relative;
}

main > section#faq h3::before {
    content: "Q";
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    font-size: 0.72rem;
    font-weight: 800;
    border-radius: 6px;
    margin-right: 10px;
    vertical-align: middle;
    flex-shrink: 0;
}

main > section#faq h3:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
}

main > section#faq h3 + p {
    padding: 16px 20px 18px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-top: none;
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    margin: 0 0 4px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

main > section#faq h3 + p::before {
    content: "A ";
    font-weight: 700;
    color: var(--accent);
}

main > section#howto ol {
    counter-reset: howto;
}

main > section#howto ol li {
    counter-increment: howto;
    padding: 14px 0 14px 48px;
    border-bottom: 1px solid var(--border);
}

main > section#howto ol li::before {
    content: counter(howto);
    width: 28px;
    height: 28px;
    font-size: 0.82rem;
    top: 14px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    box-shadow: 0 3px 10px rgba(108, 92, 231, 0.3);
}

main > section#contact p {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    background: var(--bg-glass);
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
    font-size: 0.92rem;
    transition: all var(--transition-fast);
}

main > section#contact p:hover {
    background: var(--bg-card-hover);
    transform: translateX(4px);
}

main > section#contact p:last-child {
    margin-bottom: 0;
}

footer {
    position: relative;
    z-index: 1;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: rgba(255, 255, 255, 0.78);
    padding: 48px 24px 32px;
    margin-top: 20px;
}

footer::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary-light), var(--primary));
    background-size: 300% 100%;
    animation: gradientShift 6s linear infinite;
}

footer section {
    max-width: var(--max-width);
    margin: 0 auto 28px;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

footer section:last-of-type {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

footer section h2 {
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
    letter-spacing: 0.02em;
}

footer section h2::before {
    content: "";
    display: inline-block;
    width: 3px;
    height: 0.9em;
    background: linear-gradient(180deg, var(--primary), var(--accent));
    border-radius: 2px;
    margin-right: 10px;
    vertical-align: middle;
    transform: translateY(-1px);
}

footer section p {
    font-size: 0.85rem;
    line-height: 1.85;
    color: rgba(255, 255, 255, 0.6);
}

footer > p {
    max-width: var(--max-width);
    margin: 0 auto;
    padding-top: 20px;
    font-size: 0.78rem;
    color: rgba(255, 255, 255, 0.4);
    text-align: center;
    line-height: 1.8;
}

footer a {
    color: var(--primary-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

footer a:hover {
    color: #fff;
    text-decoration: underline;
}

main > section#sitemap ul,
main > section#links ul {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 8px;
}

main > section#sitemap ul li,
main > section#links ul li {
    border-bottom: none;
    padding: 8px 12px 8px 28px;
    border-radius: var(--radius-sm);
    background: var(--bg-glass);
    transition: all var(--transition-fast);
}

main > section#sitemap ul li:hover,
main > section#links ul li:hover {
    background: var(--bg-card-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

main > section#sitemap ul li::before,
main > section#links ul li::before {
    top: 16px;
    left: 10px;
    width: 6px;
    height: 6px;
}

main > section#sitemap ul li a,
main > section#links ul li a {
    font-size: 0.88rem;
}

@media (max-width: 768px) {
    :root {
        --header-height: 60px;
    }

    header {
        padding: 40px 18px 36px;
    }

    header h1 {
        font-size: 1.35rem;
        margin-bottom: 14px;
    }

    header > p {
        font-size: 0.88rem;
        margin-bottom: 24px;
    }

    header nav ul {
        gap: 6px;
    }

    header nav ul li a {
        padding: 6px 14px;
        font-size: 0.8rem;
    }

    main {
        padding: 0 14px 40px;
    }

    main > section {
        padding: 24px 18px;
        margin-bottom: 20px;
        border-radius: var(--radius);
    }

    main > section h2 {
        font-size: 1.15rem;
        margin-bottom: 16px;
        padding-bottom: 10px;
    }

    main > section h3 {
        font-size: 1rem;
        margin: 18px 0 10px;
    }

    main > section p {
        font-size: 0.9rem;
        line-height: 1.85;
    }

    main > section article {
        padding: 18px;
        border-radius: var(--radius-sm);
    }

    main > section article h3 {
        font-size: 0.98rem;
    }

    main > section#faq h3 {
        padding: 14px 16px;
        font-size: 0.95rem;
    }

    main > section#faq h3 + p {
        padding: 14px 16px 16px;
        font-size: 0.86rem;
    }

    main > section#sitemap ul,
    main > section#links ul {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 6px;
    }

    footer {
        padding: 36px 18px 24px;
    }

    footer section h2 {
        font-size: 0.95rem;
    }

    footer section p {
        font-size: 0.82rem;
    }

    footer > p {
        font-size: 0.74rem;
    }
}

@media (max-width: 480px) {
    header {
        padding: 32px 14px 28px;
    }

    header h1 {
        font-size: 1.2rem;
    }

    header > p {
        font-size: 0.84rem;
    }

    header nav ul li a {
        padding: 5px 12px;
        font-size: 0.76rem;
    }

    main {
        padding: 0 10px 32px;
    }

    main > section {
        padding: 20px 14px;
        margin-bottom: 16px;
    }

    main > section h2 {
        font-size: 1.05rem;
    }

    main > section h2::before {
        width: 3px;
        margin-right: 8px;
    }

    main > section article {
        padding: 16px;
    }

    main > section article a {
        font-size: 0.82rem;
        padding: 5px 12px;
    }

    main > section#sitemap ul,
    main > section#links ul {
        grid-template-columns: 1fr 1fr;
        gap: 6px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

@media print {
    header {
        background: #fff !important;
        color: #000 !important;
        animation: none !important;
    }

    header h1, header > p, header nav ul li a {
        color: #000 !important;
        text-shadow: none !important;
    }

    main > section {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
        backdrop-filter: none !important;
        background: #fff !important;
    }

    footer {
        background: #fff !important;
        color: #333 !important;
    }
}

@supports not (backdrop-filter: blur(20px)) {
    main > section {
        background: var(--bg);
    }

    main > section article {
        background: var(--bg);
    }

    header nav ul li a {
        background: rgba(255, 255, 255, 0.15);
    }
}