/* AI 增长咨询页面基础样式 (style.css) */

/* 全局布局与变量 */
:root {
    --primary-glow: rgba(8, 145, 178, 0.4);
    --secondary-glow: rgba(245, 158, 11, 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: #0891b2;
    --accent-hover: #0d9488;
    
    --success-color: #f59e0b;
    --danger-color: #ec4899;
}

@media (prefers-color-scheme: light) {
    :root {
        --primary-glow: rgba(8, 145, 178, 0.2);
        --secondary-glow: rgba(245, 158, 11, 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;
}

.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;
    overflow: hidden;
}

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

.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;
    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;
}

.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);
}

/* 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%);
    }
}

.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;
    }
}

/* 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;
    }
}

/* 表单 Select, Textarea, Radio 适配 */
.form-group-float select,
.form-group-float textarea {
    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;
    font-family: inherit;
}

.form-group-float select {
    appearance: none;
    -webkit-appearance: none;
    cursor: pointer;
    padding-right: 24px;
}

.form-group-float select option {
    background: #1e293b;
    color: #fff;
}
html.day-theme .form-group-float select option {
    background: #fff;
    color: #0f172a;
}

.form-group-float .select-arrow {
    position: absolute;
    right: 0;
    top: 18px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    pointer-events: none;
}

.form-group-float textarea {
    resize: vertical;
    min-height: 80px;
}

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

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

.radio-label {
    position: relative;
    cursor: pointer;
    display: flex;
    align-items: center;
}
.radio-label input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}
.radio-custom {
    padding: 8px 16px;
    border-radius: 8px;
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    transition: all 0.3s ease;
    font-size: 0.95rem;
}
.radio-label input[type="radio"]:checked ~ .radio-custom {
    border-color: var(--accent-color);
    color: var(--accent-color);
    background: var(--primary-glow);
}