/* AI 增长咨询页面专用样式 */

/* 全局布局与变量 */
:root {
    --primary-glow: rgba(59, 130, 246, 0.4);
    --secondary-glow: rgba(139, 92, 246, 0.4);
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    
    --success-color: #10b981;
    --danger-color: #ef4444;
}

@media (prefers-color-scheme: light) {
    :root {
        --primary-glow: rgba(59, 130, 246, 0.2);
        --secondary-glow: rgba(139, 92, 246, 0.2);
        --glass-bg: rgba(255, 255, 255, 0.7);
        --glass-border: rgba(0, 0, 0, 0.1);
        --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
        --text-primary: #0f172a;
        --text-secondary: #475569;
    }
    
    /* 日间模式所有卡片加入阴影 */
    .compare-card, .solution-item, .step-card, .faq-item, .contact-glass-box {
        box-shadow: 0 15px 40px rgba(0, 0, 0, 0.08);
        border: 1px solid rgba(0, 0, 0, 0.05);
    }
}

body {
    scroll-behavior: smooth;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    overflow-x: hidden;
    margin: 0;
    padding-top: 0 !important; /* 抵消 theme-ui.css 的默认顶部 padding，实现全屏沉浸 */
}

.landing-main {
    width: 100%;
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 100px 20px;
    position: relative;
    z-index: 2;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 800;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Scroll Reveal 动画类 */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================================= */
/* 1. 极致首屏 (Premium Hero Section) */
/* ========================================================= */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 80px 20px 20px; /* 减小底部 padding 以收紧与下一区域的间隙 */
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    overflow: hidden;
}

/* 细腻的网格背景 */
.hero-bg-grid {
    position: absolute;
    inset: -50%;
    background-image: 
        linear-gradient(to right, var(--glass-border) 1px, transparent 1px),
        linear-gradient(to bottom, var(--glass-border) 1px, transparent 1px);
    background-size: 50px 50px;
    /* 让网格主要在上半部显现，底部更早更自然地向透明过渡 */
    mask-image: radial-gradient(ellipse 80% 50% at 50% 30%, black 20%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse 80% 50% at 50% 30%, black 20%, transparent 80%);
    opacity: 0.5;
}

/* 高级模糊流光渐变 */
.hero-bg-gradient {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100vw;
    height: 70vh;
    background: radial-gradient(ellipse 80% 50% at 50% 0%, var(--primary-glow), transparent);
    pointer-events: none;
}

.hero-spotlight {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    display: flex;
    flex-direction: column;
    align-items: center;
    animation: heroFadeIn 1.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes heroFadeIn {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}

.badge-pill {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 50px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.hero-title {
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin: 0 0 24px 0;
}

.text-gradient {
    background: linear-gradient(135deg, var(--accent-color) 0%, #8b5cf6 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    max-width: 680px;
    line-height: 1.6;
    margin: 0 0 40px 0;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
}

.btn-primary-modern {
    padding: 14px 28px;
    background: var(--text-primary);
    color: var(--bg-base) !important;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: all 0.2s ease;
    box-shadow: 0 4px 14px rgba(0,0,0,0.1);
}

.btn-primary-modern:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
    opacity: 0.9;
}

.btn-secondary-modern {
    padding: 14px 28px;
    background: var(--glass-bg);
    color: var(--text-primary) !important;
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-secondary-modern:hover {
    background: var(--glass-bg-hover);
    border-color: var(--text-secondary);
}

.btn-secondary-modern .arrow {
    transition: transform 0.2s ease;
}

.btn-secondary-modern:hover .arrow {
    transform: translateX(4px);
}

/* ========================================================= */
/* 2. 痛点与场景对比 (Pain Points) */
/* ========================================================= */
.pain-points-section {
    background: transparent;
    padding-top: 20px; /* 收紧顶部的过度留白 */
}

.vs-text {
    font-size: 1.5rem;
    color: var(--accent-color);
    font-style: italic;
    margin: 0 10px;
}

.cards-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    perspective: 1000px;
}

.compare-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 40px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.5s ease;
    position: relative;
    display: flex;
    flex-direction: column;
}

.compare-card:hover {
    transform: translateY(-10px) rotateX(2deg) rotateY(2deg);
    box-shadow: var(--glass-shadow);
}

.ai-card {
    border-color: rgba(59, 130, 246, 0.3);
    background: linear-gradient(145deg, var(--glass-bg) 0%, rgba(59, 130, 246, 0.05) 100%);
}

.ai-card:hover {
    box-shadow: 0 15px 35px var(--primary-glow);
    border-color: var(--accent-color);
}

.card-badge {
    position: absolute;
    top: -15px;
    left: 40px;
    background: var(--text-secondary);
    color: #fff;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.card-badge.highlight {
    background: var(--accent-color);
    box-shadow: 0 4px 12px var(--primary-glow);
}

.compare-card h3 {
    font-size: 1.5rem;
    margin-top: 10px;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.compare-list {
    list-style: none;
    padding: 0;
    margin: 0 0 30px 0;
    flex-grow: 1;
}

.compare-list li {
    position: relative;
    padding-left: 30px;
    margin-bottom: 16px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.traditional-card .compare-list li::before {
    content: '✖';
    position: absolute;
    left: 0;
    color: var(--danger-color);
}

.ai-card .compare-list li::before {
    content: '✔';
    position: absolute;
    left: 0;
    color: var(--success-color);
}

.data-indicator {
    font-size: 1.25rem;
    font-weight: 700;
    padding: 16px;
    border-radius: 12px;
    text-align: center;
}

.data-indicator.negative {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

.data-indicator.positive {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

@media (max-width: 768px) {
    .cards-grid {
        grid-template-columns: 1fr;
        gap: 60px;
    }
}

/* ========================================================= */
/* 3. 核心解决方案 (AI Solutions) */
/* ========================================================= */
.solutions-section {
    position: relative;
}

.solutions-section::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80vw;
    height: 80vw;
    background: radial-gradient(circle, var(--secondary-glow) 0%, transparent 70%);
    opacity: 0.1;
    z-index: 0;
    pointer-events: none;
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.solution-item {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.4s ease;
    backdrop-filter: blur(8px);
}

.solution-item:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.1);
    box-shadow: var(--glass-shadow);
}

html.day-theme .solution-item:hover {
    background: rgba(255, 255, 255, 0.8);
    border-color: rgba(0, 0, 0, 0.1);
}

.solution-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: inline-block;
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.2));
    transition: transform 0.3s ease;
}

.solution-item:hover .solution-icon {
    transform: scale(1.1) rotate(5deg);
}

.solution-name {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.solution-desc {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========================================================= */
/* 4. 主讲人介绍 (About the Speaker) */
/* ========================================================= */
.speaker-glass-card {
    background: linear-gradient(135deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0.01) 100%);
    border: 1px solid var(--glass-border);
    border-radius: 30px;
    padding: 60px;
    display: flex;
    align-items: center;
    gap: 60px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.2);
    position: relative;
    overflow: hidden;
}

@media (prefers-color-scheme: light) {
    .speaker-glass-card {
        background: linear-gradient(135deg, rgba(255,255,255,0.8) 0%, rgba(255,255,255,0.4) 100%);
    }
}

/* 光泽扫过效果 */
.speaker-glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    transform: skewX(-20deg);
    animation: shine 6s infinite;
}

@keyframes shine {
    0% { left: -100%; }
    20% { left: 200%; }
    100% { left: 200%; }
}

.speaker-avatar-wrapper {
    flex-shrink: 0;
    animation: floatAvatar 6s ease-in-out infinite;
}

@keyframes floatAvatar {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

.speaker-avatar {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-color), var(--secondary-glow));
    padding: 5px;
    position: relative;
}

.avatar-inner {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    font-weight: 900;
    color: var(--text-primary);
    border: 2px solid var(--glass-border);
}

.speaker-title {
    font-size: 1rem;
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 600;
    margin-bottom: 8px;
}

.speaker-name {
    font-size: 2.5rem;
    color: var(--text-primary);
    margin: 0 0 20px 0;
}

.speaker-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 24px;
}

.tag {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    padding: 6px 14px;
    border-radius: 50px;
    font-size: 0.875rem;
    border: 1px solid var(--glass-border);
}

@media (prefers-color-scheme: light) {
    .tag {
        background: rgba(0, 0, 0, 0.05);
    }
}

.speaker-bio {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 1.125rem;
}

@media (max-width: 768px) {
    .speaker-glass-card {
        flex-direction: column;
        text-align: center;
        padding: 40px 20px;
        gap: 30px;
    }
    .speaker-tags {
        justify-content: center;
    }
}

/* ========================================================= */
/* 5. 底部表单与转化 (Footer & Lead Gen) */
/* ========================================================= */
.contact-section {
    padding-bottom: 120px;
}

.contact-glass-box {
    max-width: 600px;
    margin: 0 auto;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 50px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    text-align: center;
}

.section-subtitle {
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.6;
}

.lead-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-group-float {
    position: relative;
    text-align: left;
}

.form-group-float input {
    width: 100%;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--glass-border);
    padding: 16px 0;
    font-size: 1rem;
    color: var(--text-primary);
    outline: none;
    box-sizing: border-box;
}

.form-group-float label {
    position: absolute;
    left: 0;
    top: 16px;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    pointer-events: none;
    font-size: 1rem;
}

.input-line {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width 0.4s ease;
}

.form-group-float input:focus ~ .input-line,
.form-group-float input:not(:placeholder-shown) ~ .input-line {
    width: 100%;
}

.form-group-float input:focus ~ label,
.form-group-float input:not(:placeholder-shown) ~ label {
    top: -10px;
    font-size: 0.75rem;
    color: var(--accent-color);
}

.submit-btn {
    margin-top: 20px;
    padding: 16px;
    border: none;
    border-radius: 12px;
    background: var(--accent-color);
    color: #fff;
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
}

.submit-btn:hover {
    background: var(--accent-hover);
    box-shadow: 0 8px 20px var(--primary-glow);
    transform: translateY(-2px);
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.loading-spinner {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.success-msg {
    margin-top: 20px;
    padding: 16px;
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border-radius: 8px;
    border: 1px solid rgba(16, 185, 129, 0.2);
    animation: fadeInUp 0.5s ease-out forwards;
}

@media (max-width: 600px) {
    .contact-glass-box {
        padding: 30px 20px;
    }
}

/* ========================================================= */
/* 6. V2 新增版块：跑马灯、工作流、FAQ */
/* ========================================================= */

/* 跑马灯 Marquee */
.marquee-section {
    width: 100%;
    overflow: hidden;
    background: var(--glass-bg);
    border-top: 1px solid var(--glass-border);
    border-bottom: 1px solid var(--glass-border);
    padding: 12px 0;
    white-space: nowrap;
    position: relative;
    z-index: 10;
}
.marquee-content {
    display: inline-block;
    animation: marqueeScroll 40s linear infinite;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0.05em;
}
.marquee-content span {
    display: inline-block;
    vertical-align: middle;
}
.marquee-content .dot {
    margin: 0 40px;
    color: var(--accent-color);
}
@keyframes marqueeScroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}
.marquee-section:hover .marquee-content {
    animation-play-state: paused;
}

/* 工作流可视化 Workflow */
.workflow-timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}
.workflow-timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 40px;
    width: 2px;
    background: linear-gradient(to bottom, transparent, var(--accent-color), var(--secondary-glow), transparent);
    opacity: 0.3;
}
.workflow-step {
    position: relative;
    padding-left: 100px;
    margin-bottom: 40px;
}
.workflow-step:last-child {
    margin-bottom: 0;
}
.step-number {
    position: absolute;
    left: 20px;
    top: 0;
    width: 42px;
    height: 42px;
    background: var(--glass-bg);
    border: 1px solid var(--accent-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    color: var(--accent-color);
    box-shadow: 0 0 15px rgba(59,130,246,0.3);
    z-index: 2;
}
.step-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 30px;
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.step-card:hover {
    transform: translateX(10px);
    border-color: rgba(59, 130, 246, 0.4);
    box-shadow: var(--glass-shadow);
}
.step-title {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: 12px;
}
.step-desc {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* 常见问题 FAQ */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.faq-item {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    overflow: hidden;
    backdrop-filter: blur(8px);
}
.faq-question {
    width: 100%;
    text-align: left;
    padding: 24px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: background 0.3s ease;
}
.faq-question:hover {
    background: rgba(255,255,255,0.02);
}
@media (prefers-color-scheme: light) {
    .faq-question:hover {
        background: rgba(0,0,0,0.02);
    }
}
.faq-icon {
    font-size: 1.5rem;
    color: var(--accent-color);
    transition: transform 0.3s ease;
}
.faq-item.active .faq-icon {
    transform: rotate(45deg);
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}
.answer-inner {
    padding: 0 24px 24px;
    color: var(--text-secondary);
    line-height: 1.8;
}

@media (max-width: 768px) {
    .workflow-timeline::before { left: 20px; }
    .step-number { left: 0; width: 36px; height: 36px; font-size: 0.9rem; }
    .workflow-step { padding-left: 60px; }
}