:root {
    /* 基础颜色 - 深色系主题 */
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --secondary: #10b981;
    --accent: #a855f7;
    --dark-bg: #0f172a;
    --dark-surface: #1e293b;
    --dark-card: #1e293b;
    --dark-card-hover: #27364f;
    --dark-text: #f8fafc;
    --dark-text-secondary: #94a3b8;
    --dark-border: #334155;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    
    /* 高级效果变量 */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
    --gradient-secondary: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);
    --gradient-accent: linear-gradient(135deg, #a855f7 0%, #8b5cf6 100%);
    --glass-bg: rgba(30, 41, 59, 0.85);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-highlight: rgba(255, 255, 255, 0.05);
    --glass-shadow: rgba(0, 0, 0, 0.4);
    --neuro-bg: #1e293b;
    --neuro-shadow-dark: #141b29;
    --neuro-shadow-light: #283549;
    --glow: 0 0 15px rgba(99, 102, 241, 0.5);
}

/* 基础重置与字体 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--dark-bg);
    color: var(--dark-text);
    line-height: 1.6;
    background-image: 
        radial-gradient(ellipse at top right, rgba(99, 102, 241, 0.15) 0%, transparent 70%),
        radial-gradient(ellipse at bottom left, rgba(168, 85, 247, 0.1) 0%, transparent 70%);
    min-height: 100vh;
}

/* 容器与布局 */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

header {
    text-align: center;
    margin-bottom: 2.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--dark-border);
}

header h1 {
    font-size: 2.5rem;
    color: var(--primary-light);
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

header p {
    font-size: 1.2rem;
    color: var(--dark-text-secondary);
    max-width: 800px;
    margin: 0 auto;
}

/* 章节样式 */
section {
    margin-bottom: 3rem;
    background-color: var(--dark-surface);
    border-radius: 1rem;
    box-shadow: 
        0 10px 25px rgba(0, 0, 0, 0.2),
        0 0 0 1px rgba(255, 255, 255, 0.05);
    padding: 2rem;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

section h2 {
    font-size: 1.75rem;
    color: var(--primary-light);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-dark);
}

section h3 {
    font-size: 1.5rem;
    color: var(--secondary);
    margin: 1.5rem 0 1rem;
}

section p {
    margin-bottom: 1rem;
    font-size: 1.1rem;
    color: var(--dark-text-secondary);
}

/* 系统图表 */
.system-overview {
    margin-bottom: 2rem;
}

.system-diagram {
    background-color: rgba(15, 23, 42, 0.8);
    border-radius: 1rem;
    border: 1px solid var(--dark-border);
    padding: 1.5rem;
    margin: 1.5rem 0;
    text-align: center;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.system-diagram svg {
    max-width: 100%;
    height: auto;
    filter: invert(1) hue-rotate(180deg);
}

/* 功能卡片网格 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin: 1.5rem 0;
}

.feature-card {
    background-color: var(--dark-card);
    border-radius: 1rem;
    padding: 1.5rem;
    transition: all 0.3s ease;
    border: 1px solid var(--dark-border);
    box-shadow: 
        5px 5px 10px var(--neuro-shadow-dark),
        -5px -5px 10px var(--neuro-shadow-light);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 
        8px 8px 16px var(--neuro-shadow-dark),
        -8px -8px 16px var(--neuro-shadow-light),
        0 0 0 1px var(--glass-highlight);
    background-color: var(--dark-card-hover);
}

.feature-card h4 {
    font-size: 1.25rem;
    color: var(--primary-light);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.feature-card p {
    color: var(--dark-text-secondary);
    font-size: 1rem;
    margin-bottom: 0;
}

/* 挑战与解决方案 */
.challenges-solutions {
    margin: 2rem 0;
}

.challenge-item {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--dark-border);
}

.challenge-item:last-child {
    border-bottom: none;
}

.challenge-item h4 {
    font-size: 1.25rem;
    color: var(--dark-text);
    margin-bottom: 0.75rem;
}

.challenge-item .challenge {
    background-color: rgba(239, 68, 68, 0.15);
    border-left: 4px solid var(--danger);
    padding: 0.75rem 1rem;
    margin-bottom: 1rem;
    border-radius: 0 0.5rem 0.5rem 0;
}

.challenge-item .solution {
    background-color: rgba(16, 185, 129, 0.15);
    border-left: 4px solid var(--success);
    padding: 0.75rem 1rem;
    margin-bottom: 0.5rem;
    border-radius: 0 0.5rem 0.5rem 0;
}

/* 使用案例 */
.use-case {
    margin: 2rem 0;
    padding: 1.5rem;
    background-color: rgba(30, 41, 59, 0.6);
    border-radius: 1rem;
    border: 1px solid var(--dark-border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.use-case h3 {
    color: var(--accent);
    margin-top: 0;
}

/* 优势网格 */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 1.5rem 0;
}

.advantage-item {
    background-color: var(--dark-card);
    border-radius: 1rem;
    padding: 1.5rem;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 
        5px 5px 10px var(--neuro-shadow-dark),
        -5px -5px 10px var(--neuro-shadow-light);
    border: 1px solid var(--dark-border);
}

.advantage-item:hover {
    transform: translateY(-5px);
    box-shadow: 
        8px 8px 16px var(--neuro-shadow-dark),
        -8px -8px 16px var(--neuro-shadow-light),
        0 0 0 1px var(--glass-highlight);
    background-color: var(--dark-card-hover);
}

.advantage-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.advantage-item h4 {
    font-size: 1.25rem;
    color: var(--dark-text);
    margin-bottom: 0.75rem;
}

.advantage-item p {
    color: var(--dark-text-secondary);
    font-size: 1rem;
}

/* 总结部分 */
.conclusion {
    text-align: center;
    margin: 2rem 0;
    padding: 2.5rem;
    background-color: var(--dark-card);
    border-radius: 1rem;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--dark-border);
    box-shadow: 
        0 10px 25px rgba(0, 0, 0, 0.2),
        inset 0 0 0 1px var(--glass-highlight);
}

.conclusion h2 {
    border-bottom: none;
    margin-bottom: 1rem;
    color: var(--primary-light);
}

.component {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--dark-border);
}

.component:last-child {
    border-bottom: none;
}

/* 手机模拟 - 聊天界面 */
.chat-simulation {
    margin: 3rem auto;
    border: none;
    border-radius: 2.2rem;
    overflow: hidden;
    box-shadow: 
        0 25px 60px rgba(0, 0, 0, 0.3),
        0 10px 25px rgba(0, 0, 0, 0.2);
    max-width: 480px;
    background-color: var(--dark-bg);
    background-image: 
        linear-gradient(135deg, rgba(30, 41, 59, 0.8) 0%, rgba(15, 23, 42, 0.9) 100%);
    height: 800px;
    position: relative;
    font-size: 0.9rem;
    width: 100%;
}

.mobile-frame {
    border-radius: 2.2rem;
    border: 8px solid var(--dark-surface);
    overflow: hidden;
    position: relative;
    box-shadow: 
        0 35px 60px rgba(0, 0, 0, 0.25),
        0 25px 20px rgba(0, 0, 0, 0.15),
        inset 0 2px 10px rgba(0, 0, 0, 0.6);
}

.mobile-notch {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 20px;
    background-color: #000;
    border-radius: 0 0 12px 12px;
    z-index: 10;
    box-shadow: inset 0 -2px 5px rgba(0, 0, 0, 0.5);
}

.mobile-status-bar {
    background-color: #000;
    background-image: linear-gradient(to right, #000, #0f172a, #000);
    color: white;
    display: flex;
    justify-content: space-between;
    padding: 0.3rem 1.25rem;
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.02em;
}

.mobile-time {
    font-weight: 600;
}

.mobile-icons {
    display: flex;
    gap: 0.65rem;
}

.chat-header {
    background: var(--gradient-primary);
    color: white;
    padding: 1.25rem 1rem 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    position: relative;
    z-index: 5;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.25);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.chat-header-icon {
    margin-right: 0.875rem;
    font-size: 1.5rem;
    background-color: rgba(255, 255, 255, 0.15);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 
        0 4px 8px rgba(0, 0, 0, 0.2),
        inset 0 2px 3px rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.chat-header-info {
    flex: 1;
}

.chat-header-title {
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.01em;
}

.chat-header-subtitle {
    font-size: 0.85rem;
    opacity: 0.9;
    margin-top: 2px;
}

.chat-messages {
    padding: 0.75rem;
    max-height: 600px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.875rem;
    background-color: var(--dark-bg);
    background-image: 
        radial-gradient(ellipse at top right, rgba(99, 102, 241, 0.1) 0%, transparent 70%),
        radial-gradient(ellipse at bottom left, rgba(168, 85, 247, 0.05) 0%, transparent 70%);
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
}

.chat-messages::-webkit-scrollbar {
    width: 5px;
}

.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 20px;
}

.message {
    margin-bottom: 0.5rem;
    max-width: 100%;
    animation: fadeIn 0.3s ease;
    transition: all 0.3s ease;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulseIn {
    0% { transform: scale(0.95); opacity: 0.5; }
    100% { transform: scale(1); opacity: 1; }
}

.message-user {
    margin-left: auto;
    background: var(--gradient-primary);
    color: white;
    padding: 0.875rem 1.125rem;
    border-radius: 1.5rem 1.5rem 0 1.5rem;
    box-shadow: 
        0 5px 15px rgba(99, 102, 241, 0.2),
        0 2px 5px rgba(99, 102, 241, 0.3);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    position: relative;
    z-index: 1;
}

.message-user::before {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    right: 3px;
    bottom: 3px;
    border-radius: 1.3rem 1.3rem 0 1.3rem;
    background: rgba(255, 255, 255, 0.1);
    z-index: -1;
}

.message-bot {
    background-color: var(--glass-bg);
    padding: 0.875rem 1.125rem;
    border-radius: 1.5rem 1.5rem 1.5rem 0;
    box-shadow: 
        0 5px 15px rgba(0, 0, 0, 0.15),
        0 2px 5px rgba(0, 0, 0, 0.1);
    align-self: flex-start;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    color: var(--dark-text);
}

.message-card {
    background-color: var(--glass-bg);
    border-radius: 1.25rem;
    padding: 0;
    margin: 0.5rem 0;
    width: 100%;
    box-shadow: 
        0 10px 25px rgba(0, 0, 0, 0.15),
        0 5px 10px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    animation: pulseIn 0.3s ease;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.message-card:hover {
    transform: translateY(-3px);
    box-shadow: 
        0 15px 30px rgba(0, 0, 0, 0.2),
        0 8px 15px rgba(0, 0, 0, 0.15),
        0 0 0 1px var(--glass-highlight);
}

.message-card-header {
    display: flex;
    align-items: center;
    padding: 0.875rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    background-color: rgba(30, 41, 59, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.message-card-icon {
    margin-right: 0.75rem;
    font-size: 1.2rem;
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.2);
    border-radius: 10px;
    color: var(--primary-light);
    box-shadow: 
        4px 4px 8px rgba(0, 0, 0, 0.2),
        -4px -4px 8px rgba(255, 255, 255, 0.05),
        inset 1px 1px 1px rgba(255, 255, 255, 0.1);
}

.message-card-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--dark-text);
    letter-spacing: 0.01em;
}

.message-card-content {
    background: #232c3a;
    border-radius: 18px;
    box-shadow: 0 2px 16px 0 rgba(0,0,0,0.13);
    padding: 28px 20px 24px 20px;
    margin: 16px 0;
    color: #e6eaf3;
}

.card-actions {
    margin-top: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.password-input-group {
    display: flex;
    justify-content: center;
    gap: 14px;
    margin-bottom: 18px;
}

.password-digit {
    width: 38px;
    height: 44px;
    border: 1.5px solid #3a4662;
    border-radius: 10px;
    background: #181f2b;
    color: #e6eaf3;
    font-size: 28px;
    text-align: center;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.password-digit:focus {
    border-color: #6c8cf8;
    box-shadow: 0 0 0 2px #6c8cf855;
    background: #232c3a;
}

.password-display {
    min-height: 22px;
    margin-bottom: 18px;
    color: #8fa5d3;
    font-size: 18px;
    letter-spacing: 2px;
    text-align: center;
}

.password-btn-group {
    display: flex;
    justify-content: center;
    gap: 18px;
    margin-top: 6px;
}

.card-btn-primary {
    background: linear-gradient(90deg, #6c8cf8 0%, #4e6ef2 100%);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 10px 32px;
    font-size: 17px;
    font-weight: 600;
    box-shadow: 0 2px 8px 0 #6c8cf822;
    cursor: pointer;
    transition: background 0.2s;
}
.card-btn-primary:hover {
    background: linear-gradient(90deg, #4e6ef2 0%, #6c8cf8 100%);
}

.card-btn-secondary {
    background: #28324a;
    color: #b9c7e6;
    border: none;
    border-radius: 8px;
    padding: 10px 32px;
    font-size: 17px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
}
.card-btn-secondary:hover {
    background: #232c3a;
    color: #fff;
}

/* 适当调整输入框和卡片的字体和颜色 */
.message-card-content p {
    color: #b9c7e6;
    font-size: 16px;
    margin-bottom: 18px;
}

@media (max-width: 480px) {
    .message-card-content {
        padding: 16px 6px 14px 6px;
    }
    .password-digit {
        width: 30px;
        height: 36px;
        font-size: 22px;
    }
    .card-btn-primary, .card-btn-secondary {
        padding: 9px 16px;
        font-size: 15px;
    }
}

.card-actions {
    display: flex;
    gap: 0.75rem;
    padding: 0.5rem 0.75rem 0.875rem;
    flex-wrap: wrap;
}

.card-btn {
    padding: 0.625rem 0.875rem;
    border: none;
    border-radius: 10px;
    background: var(--gradient-primary);
    color: white;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    flex: 1;
    min-width: 100px;
    text-align: center;
    box-shadow: 
        0 5px 15px rgba(99, 102, 241, 0.2),
        0 2px 5px rgba(99, 102, 241, 0.3),
        inset 0 1px 1px rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.card-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: all 0.6s ease;
}

.card-btn:hover::before {
    left: 100%;
}

.card-btn:hover {
    transform: translateY(-3px);
    box-shadow: 
        0 10px 25px rgba(99, 102, 241, 0.25),
        0 5px 10px rgba(99, 102, 241, 0.15),
        inset 0 1px 1px rgba(255, 255, 255, 0.2),
        0 0 15px rgba(99, 102, 241, 0.3);
}

.card-btn-secondary {
    background: rgba(30, 41, 59, 0.7);
    box-shadow: 
        0 5px 15px rgba(0, 0, 0, 0.15),
        0 2px 5px rgba(0, 0, 0, 0.1),
        inset 0 1px 1px rgba(255, 255, 255, 0.05);
    color: var(--dark-text);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    border: 1px solid var(--glass-border);
}

.card-btn-secondary:hover {
    background-color: rgba(51, 65, 85, 0.8);
    box-shadow: 
        0 10px 20px rgba(0, 0, 0, 0.2),
        0 5px 10px rgba(0, 0, 0, 0.15),
        inset 0 1px 1px rgba(255, 255, 255, 0.05);
}

.progress-dots {
    display: flex;
    justify-content: center;
    margin: 0.75rem 0;
    gap: 0.35rem;
}

.progress-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: rgba(99, 102, 241, 0.3);
    box-shadow: 
        2px 2px 4px rgba(0, 0, 0, 0.2),
        -2px -2px 4px rgba(255, 255, 255, 0.05),
        inset 1px 1px 1px rgba(0, 0, 0, 0.2);
    animation: dotPulse 1.5s infinite;
}

.progress-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.progress-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes dotPulse {
    0%, 100% { transform: scale(0.7); opacity: 0.5; }
    50% { transform: scale(1); opacity: 1; box-shadow: 0 0 10px rgba(99, 102, 241, 0.5); }
}

.card-badge {
    display: inline-block;
    padding: 0.3rem 0.6rem;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 600;
    margin: 0.35rem 0;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    box-shadow: 
        2px 2px 4px rgba(0, 0, 0, 0.2),
        -2px -2px 4px rgba(0, 0, 0, 0.1);
    letter-spacing: 0.01em;
    min-width: 80px;
    text-align: center;
}

.badge-success {
    background-color: rgba(16, 185, 129, 0.2);
    color: #34d399;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-warning {
    background-color: rgba(245, 158, 11, 0.2);
    color: #fbbf24;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-danger {
    background-color: rgba(239, 68, 68, 0.2);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.card-account {
    display: flex;
    align-items: center;
    padding: 0.625rem 0.75rem;
    border-radius: 10px;
    margin: 0.625rem 0;
    background-color: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    box-shadow: 
        3px 3px 6px rgba(0, 0, 0, 0.2),
        -3px -3px 6px rgba(255, 255, 255, 0.03);
    transition: all 0.3s ease;
}

.card-account:hover {
    transform: translateY(-2px);
    background-color: rgba(51, 65, 85, 0.4);
    box-shadow: 
        5px 5px 10px rgba(0, 0, 0, 0.25),
        -5px -5px 10px rgba(255, 255, 255, 0.03),
        0 0 0 1px var(--glass-highlight);
}

.card-account-icon {
    margin-right: 0.75rem;
    font-size: 1.15rem;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-light);
    background: rgba(99, 102, 241, 0.15);
    border-radius: 8px;
    box-shadow: 
        2px 2px 4px rgba(0, 0, 0, 0.2),
        -2px -2px 4px rgba(255, 255, 255, 0.05),
        inset 0 0 0 1px rgba(99, 102, 241, 0.2);
}

.card-account-info {
    flex: 1;
    word-wrap: break-word;
    overflow-wrap: break-word;
    padding-right: 0.25rem;
}

.card-account-info strong {
    color: var(--dark-text);
}

.card-selected {
    border: 1px solid rgba(99, 102, 241, 0.3);
    background-color: rgba(99, 102, 241, 0.15);
    box-shadow: 
        3px 3px 6px rgba(0, 0, 0, 0.2),
        -3px -3px 6px rgba(255, 255, 255, 0.03),
        inset 0 0 15px rgba(99, 102, 241, 0.1);
}

.payment-plan {
    margin-top: 0.75rem;
    padding: 0.75rem;
    background-color: rgba(15, 23, 42, 0.5);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(51, 65, 85, 0.5);
    box-shadow: 
        3px 3px 6px rgba(0, 0, 0, 0.15),
        -3px -3px 6px rgba(255, 255, 255, 0.02);
}

.payment-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(51, 65, 85, 0.5);
    font-weight: 500;
    color: var(--dark-text-secondary);
}

.payment-item:last-child {
    border-bottom: none;
}

.mobile-input {
    position: relative;
    display: flex;
    padding: 0.625rem 0.75rem;
    background-color: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-top: 1px solid rgba(51, 65, 85, 0.5);
    box-shadow: 0 -5px 10px rgba(0, 0, 0, 0.1);
}

.input-field {
    flex: 1;
    padding: 0.625rem 1rem;
    border-radius: 1.5rem;
    border: 1px solid rgba(51, 65, 85, 0.7);
    background-color: rgba(30, 41, 59, 0.6);
    color: var(--dark-text);
    font-size: 0.95rem;
    box-shadow: 
        inset 2px 2px 5px rgba(0, 0, 0, 0.2),
        inset -2px -2px 5px rgba(255, 255, 255, 0.02);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    transition: all 0.3s ease;
}

.input-field:focus {
    outline: none;
    box-shadow: 
        0 0 0 3px rgba(99, 102, 241, 0.2),
        inset 2px 2px 5px rgba(0, 0, 0, 0.2),
        inset -2px -2px 5px rgba(255, 255, 255, 0.02);
    border-color: rgba(99, 102, 241, 0.5);
}

.input-field::placeholder {
    color: rgba(148, 163, 184, 0.7);
}

.send-button {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: 0.75rem;
    cursor: pointer;
    box-shadow: 
        0 5px 15px rgba(99, 102, 241, 0.2),
        0 2px 5px rgba(99, 102, 241, 0.3),
        inset 0 1px 1px rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
    font-size: 1rem;
}

.send-button:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 
        0 8px 20px rgba(99, 102, 241, 0.25),
        0 4px 10px rgba(99, 102, 241, 0.15),
        inset 0 1px 1px rgba(255, 255, 255, 0.2),
        0 0 15px rgba(99, 102, 241, 0.3);
}

.typing-indicator {
    display: flex;
    align-items: center;
    margin: 0.75rem 0;
}

.typing-bubble {
    padding: 0.5rem 1rem;
    background-color: rgba(51, 65, 85, 0.5);
    border-radius: 1rem;
    display: inline-block;
    position: relative;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    box-shadow: 
        2px 2px 5px rgba(0, 0, 0, 0.2),
        -2px -2px 5px rgba(255, 255, 255, 0.03);
}

/* 充实整个卡片的空间 */
.message-bot .message-card {
    width: 100%;
    margin-left: 0;
    margin-right: auto;
}

.message-card-content p {
    margin-bottom: 0.625rem;
}
/* 工具调用卡片样式 */
.message-toolcall {
    display: flex;
    justify-content: center;
    margin: 18px 0;
    background: none;
    box-shadow: none;
}

.toolcall-card {
    background: #202b3a;
    border: 1.5px solid #6c8cf8;
    border-radius: 14px;
    box-shadow: 0 2px 12px 0 rgba(108,140,248,0.10);
    padding: 18px 26px 20px 26px;
    min-width: 260px;
    max-width: 98vw;
    color: #e6eaf3;
    font-size: 16px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.toolcall-header {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
}

.toolcall-icon {
    font-size: 20px;
    margin-right: 8px;
}

.toolcall-title {
    font-weight: 700;
    color: #6c8cf8;
    font-size: 16px;
    letter-spacing: 1px;
}

.toolcall-body {
    color: #b9c7e6;
    font-size: 15px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.progress-dots {
    display: flex;
    gap: 6px;
    margin-top: 8px;
}

.progress-dot {
    width: 8px;
    height: 8px;
    background: #6c8cf8;
    border-radius: 50%;
    opacity: 0.7;
    animation: progress-bounce 1.2s infinite ease-in-out both;
}
.progress-dot:nth-child(2) { animation-delay: 0.2s; }
.progress-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes progress-bounce {
    0%, 80%, 100% { transform: scale(0.8); opacity: 0.5; }
    40% { transform: scale(1.2); opacity: 1; }
}
.account-input,
.password-input {
    width: 100%;
    max-width: 320px;
    margin-bottom: 16px;
    padding: 12px 14px;
    border: 1.5px solid #3a4662;
    border-radius: 10px;
    background: #181f2b;
    color: #e6eaf3;
    font-size: 17px;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    box-sizing: border-box;
}
.account-input:focus,
.password-input:focus {
    border-color: #6c8cf8;
    box-shadow: 0 0 0 2px #6c8cf855;
    background: #232c3a;
}

/* 响应式调整 */
@media (max-width: 768px) {
    /* 基础样式 */
    body, html {
        margin: 0;
        padding: 0;
        width: 100%;
        overflow-x: hidden;
    }
    
    .container {
        padding: 1rem;
    }
    
    .features-grid, .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    section {
        padding: 1.5rem 1rem;
        margin-bottom: 2rem;
        border-radius: 1rem;
    }
    
    /* 使用案例容器样式 */
    .use-case {
        width: 100% !important;
        margin: 0 -1rem !important;
        padding: 0 !important;
        border: none !important;
        background: none !important;
        overflow: hidden !important;
        position: relative !important;
    }
    
    /* 手机模拟器占满全屏 */
    .chat-simulation {
        width: 100% !important;
        max-width: 100% !important;
        margin: 0 !important;
        padding: 0 !important;
        border-radius: 0 !important;
        box-shadow: none !important;
        border: none !important;
        font-size: 0.85rem;
        height: 640px;
    }
    
    /* 对移动端的内部元素进行调整 */
    .mobile-frame {
        border: none !important;
        border-radius: 0 !important;
        width: 100% !important;
        box-shadow: none !important;
    }
    
    .mobile-notch {
        display: none;
    }
    
    .mobile-status-bar {
        padding: 0.4rem 1rem;
    }
    
    .chat-header {
        padding: 1rem;
    }
    
    .chat-messages {
        max-height: 470px;
        padding: 0.75rem 1rem;
        gap: 0.75rem;
    }
    
    .message {
        max-width: 100%;
    }
    
    .message-user, .message-bot {
        padding: 0.75rem 1rem;
    }
    
    .message-bot .message-card {
        width: 100%;
        margin: 0.5rem 0;
    }
    
    .message-card-content {
        padding: 0.875rem 1rem;
    }
    
    .card-account {
        padding: 0.75rem;
    }
    
    .card-actions {
        padding: 0.5rem 0.75rem 1rem;
        gap: 0.625rem;
    }
    
    .card-btn {
        padding: 0.7rem 1rem;
        font-size: 0.85rem;
        border-radius: 10px;
    }
    
    .mobile-input {
        padding: 0.75rem 1rem;
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        width: 100%;
        background-color: rgba(15, 23, 42, 0.98);
        z-index: 100;
    }
    
    .input-field {
        padding: 0.75rem 1rem;
    }
    
    .send-button {
        width: 42px;
        height: 42px;
        font-size: 1rem;
    }
}

/* 让手机端聊天展示更大更舒适 */
@media (max-width: 600px) {
    .chat-simulation {
        height: 100vh !important;
        min-height: 100vh !important;
        max-width: 100vw !important;
        font-size: 1.1rem;
    }
    .mobile-frame {
        width: 100vw !important;
        min-height: 100vh !important;
        border-radius: 0 !important;
        border: none !important;
        box-shadow: none !important;
    }
    .chat-messages {
        max-height: 65vh !important;
        padding: 1.2rem 1.2rem !important;
        gap: 1.1rem !important;
    }
    .message {
        font-size: 1.08rem !important;
        padding: 1.1rem 1.2rem !important;
    }
    .message-card-content {
        font-size: 1.05rem !important;
        padding: 1.2rem 1.2rem !important;
    }
    .mobile-input {
        padding: 1.2rem 1.2rem !important;
    }
    .input-field {
        font-size: 1.08rem !important;
        padding: 1.1rem 1.2rem !important;
    }
    .send-button {
        width: 54px !important;
        height: 54px !important;
        font-size: 1.25rem !important;
    }
}