:root {
    --primary: #4f6df5;
    --primary-light: #6b8aff;
    --primary-dark: #3a56e6;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --bg-light: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    --card-bg: rgba(255, 255, 255, 0.85);
    --border-light: rgba(148, 163, 184, 0.15);
    --shadow-light: 0 12px 36px rgba(148, 163, 184, 0.15);
    --text-inverse: #edf2f7;
    --bg-dark: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    --card-bg-dark: rgba(30, 41, 59, 0.9);
    --border-dark: rgba(255, 255, 255, 0.1);
    --shadow-dark: 0 12px 36px rgba(0, 0, 0, 0.25);
    --dark-text-primary: #f8fafc;
    --dark-text-secondary: #cbd5e1;
    --tech-glow: 0 0 10px rgba(79, 109, 245, 0.3);
    --tech-glow-hover: 0 0 15px rgba(79, 109, 245, 0.5);
    --tech-border: 1px solid rgba(79, 109, 245, 0.1);
    --tech-grid: linear-gradient(rgba(79, 109, 245, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(79, 109, 245, 0.03) 1px, transparent 1px);
    --transition-smooth: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    --transition-fast: all 0.2s ease;
    --card-radius: 20px;
    --header-height: 80px;
    --player-size: 60px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-light);
    background-size: 20px 20px;
    min-height: 100vh;
    transition: var(--transition-smooth);
    position: relative;
    overflow-x: hidden;
    font-weight: 300;
    letter-spacing: -0.2px;
}

/* 更新公告栏样式 */
.update-announcement {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: var(--tech-border);
    box-shadow: var(--shadow-light), var(--tech-glow);
    z-index: 800;
    padding: 0.8rem 0;
    transform: translateY(-100%);
    opacity: 0;
    animation: slideDown 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
    animation-delay: 0.8s;
    transition: var(--transition-smooth);
}

@keyframes slideDown {
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.update-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    gap: 1rem;
}

.update-text {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.update-icon {
    color: #10b981;
    font-size: 1.4rem;
    animation: pulse 2s infinite;
}

.update-message {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 400;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.update-version {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.update-time {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.update-log {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.update-log::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--primary);
    transition: width 0.3s ease;
}

.update-log:hover::after {
    width: 100%;
}

.update-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.2rem;
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition-fast);
}

.update-close:hover {
    color: var(--text-primary);
    background: rgba(79, 109, 245, 0.1);
}

/* 赞赏按钮样式 */
.appreciate-btn {
    position: fixed;
    bottom: 150px;
    right: 30px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 15px;
    transition: var(--transition-smooth);
}

.appreciate-main-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: var(--tech-border);
    box-shadow: var(--shadow-light), var(--tech-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
    z-index: 2;
}

.appreciate-main-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(79, 109, 245, 0.2), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.appreciate-main-btn:hover::before {
    opacity: 1;
}

.appreciate-main-btn:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: var(--shadow-light), var(--tech-glow-hover);
}

.appreciate-main-btn i {
    font-size: 24px;
    color: var(--primary);
    transition: var(--transition-smooth);
}

.appreciate-options {
    display: flex;
    flex-direction: column;
    gap: 15px;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition-smooth);
    pointer-events: none;
}

.appreciate-btn:hover .appreciate-options {
    opacity: 1;
    transform: translateY(0);
    pointer-events: all;
}

.appreciate-option {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: var(--tech-border);
    box-shadow: var(--shadow-light), var(--tech-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-smooth);
    position: relative;
}

.appreciate-option:hover {
    transform: translateY(-3px) scale(1.1);
    box-shadow: var(--shadow-light), var(--tech-glow-hover);
}

.appreciate-option i {
    font-size: 20px;
    color: var(--primary);
}

.appreciate-label {
    position: absolute;
    right: 60px;
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: var(--tech-border);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    box-shadow: var(--shadow-light);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition-smooth);
    white-space: nowrap;
}

.appreciate-option:hover .appreciate-label {
    opacity: 1;
    right: 65px;
}

/* 微信支付模态框 */
.wechat-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
    backdrop-filter: blur(5px);
}

.wechat-modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--card-bg);
    border-radius: var(--card-radius);
    width: 90%;
    max-width: 350px;
    padding: 2.5rem 2rem;
    text-align: center;
    box-shadow: var(--shadow-dark);
    border: var(--tech-border);
    position: relative;
    transform: scale(0.8);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.wechat-modal.active .modal-content {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-primary);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.3s ease;
}

.modal-close:hover {
    background: rgba(79, 109, 245, 0.1);
}

.modal-icon {
    font-size: 3rem;
    color: #09bb07;
    margin-bottom: 1.5rem;
    text-shadow: 0 0 15px rgba(9, 187, 7, 0.3);
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.modal-desc {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.qrcode-container {
    padding: 15px;
    background: white;
    border-radius: 12px;
    display: inline-block;
    margin-bottom: 1.5rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.qrcode {
    width: 200px;
    height: 200px;
    background:
        linear-gradient(45deg, #f0f0f0 25%, transparent 25%, transparent 75%, #f0f0f0 75%),
        linear-gradient(45deg, #f0f0f0 25%, transparent 25%, transparent 75%, #f0f0f0 75%);
    background-size: 20px 20px;
    background-position: 0 0, 10px 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.qrcode::before {
    content: '';
    position: absolute;
    width: 180px;
    height: 180px;
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
}

.qrcode::after {
    content: '微信支付';
    position: absolute;
    color: #333;
    font-weight: bold;
    font-size: 1.2rem;
    z-index: 2;
    background: white;
    padding: 5px 15px;
    border-radius: 5px;
}

.tip {
    margin-top: 1.5rem;
    font-size: 0.9rem;
    color: var(--text-muted);
    font-style: italic;
}

/* 现有样式保持不变 */
.tech-border-corner {
    position: fixed;
    width: 40px;
    height: 40px;
    border: 2px solid var(--primary);
    z-index: 1000;
    box-shadow: var(--tech-glow);
}

.top-left {
    top: 20px;
    left: 20px;
    border-right: none;
    border-bottom: none;
}

.top-right {
    top: 20px;
    right: 20px;
    border-left: none;
    border-bottom: none;
}

.bottom-left {
    bottom: 20px;
    left: 20px;
    border-right: none;
    border-top: none;
}

.bottom-right {
    bottom: 20px;
    right: 20px;
    border-left: none;
    border-top: none;
}

.language-switch {
    position: fixed;
    top: 90px;
    right: 20px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 10px;
    background: var(--card-bg);
    padding: 10px;
    border-radius: 12px;
    box-shadow: var(--shadow-light), var(--tech-glow);
    border: var(--tech-border);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 1001;
}

.language-switch button {
    padding: 8px 16px;
    border-radius: 8px;
    border: none;
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: 'Poppins', sans-serif;
    font-size: 0.9rem;
    font-weight: 500;
}

.language-switch button:hover {
    background: rgba(79, 109, 245, 0.1);
}

.language-switch button.active {
    background: var(--primary);
    color: white;
}

.mobile-language-selector {
    display: none;
    margin-bottom: 1.5rem;
}

.language-select {
    width: 100%;
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid var(--border-light);
    background: var(--card-bg);
    color: var(--text-primary);
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%234a5568' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 16px;
    padding-right: 3rem;
}

.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
    pointer-events: none;
}

.particles span {
    position: absolute;
    display: block;
    width: 20px;
    height: 20px;
    background: rgba(79, 109, 245, 0.1);
    border-radius: 50%;
    box-shadow: 0 0 10px rgba(100, 108, 255, 0.5),
        0 0 20px rgba(100, 108, 255, 0.3),
        0 0 30px rgba(100, 108, 255, 0.1);
    animation: float 15s linear infinite;
    bottom: -150px;
}

body.dark-mode .particles span {
    background: rgba(79, 109, 245, 0.2);
    box-shadow: 0 0 15px rgba(100, 108, 255, 0.8),
        0 0 25px rgba(100, 108, 255, 0.5),
        0 0 35px rgba(100, 108, 255, 0.2);
}

@keyframes float {
    0% {
        transform: translateY(0) rotate(0deg);
        opacity: 1;
        border-radius: 0;
    }

    100% {
        transform: translateY(-1000px) rotate(720deg);
        opacity: 0;
        border-radius: 50%;
    }
}

.scanlines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(to bottom,
            transparent 0%,
            rgba(100, 108, 255, 0.05) 1px,
            transparent 2px);
    background-size: 100% 4px;
    animation: scan 8s linear infinite;
    pointer-events: none;
    z-index: 2;
}

@keyframes scan {
    0% {
        background-position: 0 0;
    }

    100% {
        background-position: 0 100%;
    }
}

.grid-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        linear-gradient(rgba(79, 109, 245, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(79, 109, 245, 0.05) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
    z-index: 1;
    opacity: 0.5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2.5rem 1.5rem;
    position: relative;
    z-index: 3;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow-light);
    display: flex;
    align-items: center;
    padding: 0 2rem;
    z-index: 900;
    border-bottom: var(--tech-border);
}

.logo {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(90deg, var(--primary), #8a63d2);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: 1px;
    position: relative;
    padding: 0.5rem 1rem;
}

.logo::before,
.logo::after {
    content: '';
    position: absolute;
    width: 10px;
    height: 10px;
    border: 2px solid var(--primary);
}

.logo::before {
    top: 0;
    left: 0;
    border-right: none;
    border-bottom: none;
}

.logo::after {
    top: 0;
    right: 0;
    border-left: none;
    border-bottom: none;
}

nav ul {
    display: flex;
    margin-left: auto;
    gap: 2rem;
    list-style: none;
}

nav a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 1.1rem;
    position: relative;
    padding: 0.5rem 0;
    transition: var(--transition-fast);
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition-smooth);
}

nav a:hover {
    color: var(--primary);
}

nav a:hover::after {
    width: 100%;
}

.hero {
    padding: 7rem 0 4rem;
    background: var(--card-bg);
    border-radius: var(--card-radius);
    margin-top: var(--header-height);
    margin-bottom: 3.5rem;
    box-shadow: var(--shadow-light), var(--tech-glow);
    position: relative;
    overflow: hidden;
    text-align: center;
    transition: var(--transition-smooth);
    border: var(--tech-border);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: var(--card-radius) var(--card-radius) 0 0;
    animation: gradientShift 8s linear infinite;
}

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

    100% {
        background-position: 100% 50%;
    }
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2.5rem;
    margin-top: 1.5rem;
    position: relative;
    z-index: 2;
}

.hero-logo {
    max-width: 500px;
    height: auto;
    filter: drop-shadow(0 6px 12px rgba(79, 109, 245, 0.2));
    transition: transform 0.3s ease;
    position: relative;
}

.hero-logo::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    border: 2px solid var(--primary);
    border-radius: 10px;
    opacity: 0.5;
    z-index: -1;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 0.5;
    }

    50% {
        transform: scale(1.05);
        opacity: 0.8;
    }

    100% {
        transform: scale(1);
        opacity: 0.5;
    }
}

.hero-name {
    font-size: clamp(2rem, 6vw, 3.5rem);
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.03em;
    line-height: 1.2;
    transition: color 0.3s ease;
    text-shadow: 0 0 10px rgba(79, 109, 245, 0.2);
    font-family: 'Orbitron', sans-serif;
    background: linear-gradient(90deg, var(--primary), #8a63d2);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    position: relative;
    padding: 0.5rem 1rem;
}

.hero-name::before,
.hero-name::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid var(--primary);
}

.hero-name::before {
    top: 0;
    left: 0;
    border-right: none;
    border-bottom: none;
}

.hero-name::after {
    top: 0;
    right: 0;
    border-left: none;
    border-bottom: none;
}

.hero-tagline {
    font-size: clamp(1.1rem, 3vw, 1.4rem);
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.6;
    transition: color 0.3s ease;
    position: relative;
    font-weight: 300;
    padding: 1rem;
    border: 1px solid rgba(79, 109, 245, 0.2);
    border-radius: 10px;
    background: rgba(79, 109, 245, 0.05);
}

.hero-tagline::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
    box-shadow: 0 0 10px var(--primary);
}

.section {
    background: var(--card-bg);
    border-radius: var(--card-radius);
    padding: 3rem 2.5rem;
    margin-bottom: 3rem;
    box-shadow: var(--shadow-light), var(--tech-glow);
    transition: var(--transition-smooth);
    text-align: center;
    border: var(--tech-border);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    position: relative;
    overflow: hidden;
}

.section-glow {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, rgba(79, 109, 245, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.section:hover .section-glow {
    opacity: 1;
}

.section::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(79, 109, 245, 0.1), transparent);
    transition: left 0.7s ease;
}

.section:hover::before {
    left: 100%;
}

.section:hover {
    transform: translateY(-5px);
    box-shadow: 0 16px 40px rgba(148, 163, 184, 0.2), var(--tech-glow-hover);
}

.section:last-child {
    margin-bottom: 0;
}

.section-title {
    font-size: clamp(1.6rem, 4.5vw, 1.9rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.8rem;
    display: flex;
    align-items: center;
    gap: 14px;
    justify-content: center;
    transition: color 0.3s ease;
    position: relative;
    padding: 0.5rem;
}

.section-title::before {
    content: '[';
    position: absolute;
    left: -20px;
    color: var(--primary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.section-title::after {
    content: ']';
    position: absolute;
    right: -20px;
    color: var(--primary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.section:hover .section-title::before,
.section:hover .section-title::after {
    opacity: 1;
}

.section-title i {
    color: var(--primary);
    font-size: 1.6rem;
    transition: transform 0.3s ease;
    text-shadow: 0 0 10px rgba(79, 109, 245, 0.5);
}

.section-title:hover i {
    transform: scale(1.1);
}

.section-content {
    font-size: clamp(1rem, 3.5vw, 1.1rem);
    color: var(--text-secondary);
    max-width: 850px;
    margin: 0 auto 2.5rem;
    line-height: 1.8;
    transition: color 0.3s ease;
}

.feature-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 1rem 2rem;
    background: linear-gradient(45deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    font-weight: 500;
    border-radius: 12px;
    text-decoration: none;
    transition: var(--transition-smooth);
    box-shadow: 0 6px 18px rgba(79, 109, 245, 0.25), var(--tech-glow);
    margin: 1.5rem auto 0;
    text-align: center;
    position: relative;
    overflow: hidden;
    z-index: 1;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.feature-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0%;
    height: 100%;
    background: linear-gradient(45deg, var(--primary-light) 0%, var(--primary) 100%);
    transition: width 0.3s ease;
    z-index: -1;
}

.feature-link:hover::before {
    width: 100%;
}

.feature-link:hover {
    transform: translateY(-3px) translateX(5px);
    box-shadow: 0 8px 24px rgba(79, 109, 245, 0.35), var(--tech-glow-hover);
}

.feature-link i {
    transition: transform 0.3s ease;
}

.feature-link:hover i {
    transform: translateX(6px);
}

.footer-disclaimer {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 2.5rem 1.5rem;
    margin-top: 4rem;
    box-shadow: var(--shadow-light), var(--tech-glow);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.8;
    transition: var(--transition-smooth);
    border: var(--tech-border);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    position: relative;
    overflow: hidden;
}

.footer-disclaimer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        linear-gradient(90deg, transparent 50%, rgba(79, 109, 245, 0.05) 50%),
        linear-gradient(transparent 50%, rgba(79, 109, 245, 0.05) 50%);
    background-size: 20px 20px;
    z-index: -1;
    opacity: 0.3;
}

.footer-disclaimer strong {
    color: var(--text-primary);
    font-weight: 600;
    transition: color 0.3s ease;
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}

.delay-1 {
    animation-delay: 0.1s;
}

.delay-2 {
    animation-delay: 0.2s;
}

.delay-3 {
    animation-delay: 0.3s;
}

.delay-4 {
    animation-delay: 0.4s;
}

.delay-5 {
    animation-delay: 0.5s;
}

.delay-6 {
    animation-delay: 0.6s;
}

.Appreciate_Slok {
    max-width: 250px;
    height: auto;
    filter: drop-shadow(0 6px 12px rgba(79, 109, 245, 0.2));
    transition: transform 0.3s ease;
    position: relative;
}

.Appreciate_Slok::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    border: 2px solid var(--primary);
    border-radius: 10px;
    opacity: 0.5;
    z-index: -1;
    animation: pulse 2s infinite;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero {
        padding: 6rem 0 3rem;
    }

    .section {
        padding: 2.5rem 2rem;
    }

    .tech-border-corner {
        width: 25px;
        height: 25px;
    }

    .top-left {
        top: 10px;
        left: 10px;
    }

    .top-right {
        top: 10px;
        right: 10px;
    }

    .bottom-left {
        bottom: 10px;
        left: 10px;
    }

    .bottom-right {
        bottom: 10px;
        right: 10px;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 70px;
        --player-size: 50px;
    }

    header {
        padding: 0 1.5rem;
    }

    nav ul {
        display: none;
    }

    .hero {
        padding: 7rem 0 2rem;
        margin-bottom: 2rem;
    }

    .hero-name {
        font-size: 2.5rem;
    }

    .section {
        padding: 2.5rem 1.5rem;
    }

    .language-switch {
        top: calc(var(--header-height) + 10px);
        right: 80px;
        flex-direction: row;
    }

    .mobile-language-selector {
        display: block;
        width: calc(100% - 3rem);
        margin: 0 auto 2rem;
    }

    .tech-border-corner {
        display: none;
    }

    .logo::before,
    .logo::after,
    .hero-name::before,
    .hero-name::after {
        display: none;
    }

    /* 调整更新公告栏在移动端 */
    .update-content {
        flex-direction: column;
        text-align: center;
        gap: 0.5rem;
    }

    .update-text {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-name {
        font-size: 2rem;
    }

    .hero-tagline {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .section-content {
        font-size: 1rem;
    }

    .feature-link {
        padding: 0.8rem 1.8rem;
        font-size: 1rem;
    }

    /* 调整更新公告栏在移动端 */
    .update-announcement {
        padding: 0.6rem 0;
    }

    .update-message {
        font-size: 0.8rem;
    }
}

/* 移动端适配 */
@media (max-width: 768px) {
    .btn-text {
        display: none;
    }
}