/* AI Agent 落地页 */
.ag-page {
    --ag-primary: #667eea;
    --ag-secondary: #764ba2;
    --ag-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --ag-text: #1f2340;
    --ag-muted: #5f6480;
    color: var(--ag-text);
}

.ag-page .nav-link.active {
    color: var(--ag-primary);
}

.ag-page .nav-link.active::after {
    width: 100%;
}

/* Hero */
.ag-hero {
    padding: 150px 0 100px;
    background:
        radial-gradient(circle at 85% 20%, rgba(118, 75, 162, 0.18), transparent 45%),
        radial-gradient(circle at 10% 80%, rgba(102, 126, 234, 0.2), transparent 45%),
        linear-gradient(135deg, #f5f7fa 0%, #e6ebf7 100%);
    overflow: hidden;
}

.ag-hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 4rem;
    align-items: center;
}

.ag-badge,
.ag-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 999px;
    background: rgba(102, 126, 234, 0.12);
    color: var(--ag-secondary);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
}

.ag-page .ag-hero-title {
    font-size: 3.2rem;
    line-height: 1.2;
    font-weight: 700;
    margin-bottom: 1.25rem;
    color: var(--ag-text);
}

.ag-hero-desc {
    font-size: 1.15rem;
    color: var(--ag-muted);
    margin-bottom: 2rem;
    max-width: 560px;
}

.ag-hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 2.5rem;
}

.ag-hero-stats {
    display: flex;
    gap: 2.5rem;
    flex-wrap: wrap;
}

.ag-hero-stat strong {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    background: var(--ag-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.ag-hero-stat span {
    font-size: 0.9rem;
    color: var(--ag-muted);
}

/* Hero 对话示意 */
.ag-hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
}

.ag-chat-card {
    width: 100%;
    max-width: 380px;
    background: #fff;
    border-radius: 20px;
    padding: 1.25rem;
    box-shadow: 0 20px 50px rgba(64, 60, 140, 0.18);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    animation: ag-float 6s ease-in-out infinite;
}

.ag-chat-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid #eef0f7;
}

.ag-chat-header strong {
    display: block;
    font-size: 1rem;
}

.ag-chat-header small {
    display: flex;
    align-items: center;
    gap: 6px;
    color: #2eaa5c;
    font-size: 0.8rem;
}

.ag-avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--ag-gradient);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ag-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #2eaa5c;
}

.ag-bubble {
    max-width: 85%;
    padding: 10px 14px;
    border-radius: 14px;
    font-size: 0.92rem;
    line-height: 1.5;
}

.ag-bubble-user {
    align-self: flex-end;
    background: #eef0fb;
    color: var(--ag-text);
    border-bottom-right-radius: 4px;
}

.ag-bubble-ai {
    align-self: flex-start;
    background: var(--ag-gradient);
    color: #fff;
    border-bottom-left-radius: 4px;
}

.ag-typing {
    align-self: flex-start;
    display: flex;
    gap: 4px;
    padding: 10px 14px;
    background: #f3f4fa;
    border-radius: 14px;
}

.ag-typing span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #a3a8c7;
    animation: ag-blink 1.2s infinite;
}

.ag-typing span:nth-child(2) { animation-delay: 0.2s; }
.ag-typing span:nth-child(3) { animation-delay: 0.4s; }

.ag-lead-chip {
    position: absolute;
    left: 0;
    bottom: -28px;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: #fff;
    padding: 0.8rem 1.1rem;
    border-radius: 14px;
    box-shadow: 0 12px 30px rgba(64, 60, 140, 0.18);
    animation: ag-float 6s ease-in-out infinite reverse;
}

.ag-lead-chip i {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: rgba(255, 138, 76, 0.15);
    color: #ff7a3d;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ag-lead-chip strong {
    display: block;
    font-size: 0.92rem;
}

.ag-lead-chip small {
    color: var(--ag-muted);
    font-size: 0.8rem;
}

@keyframes ag-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes ag-blink {
    0%, 80%, 100% { opacity: 0.3; }
    40% { opacity: 1; }
}

/* 通用区块 */
.ag-section {
    padding: 90px 0;
    background: #fff;
}

.ag-section-alt {
    background: #f7f8fd;
}

.ag-section-header {
    text-align: center;
    max-width: 760px;
    margin: 0 auto 3.5rem;
}

.ag-page .ag-section-header h2 {
    font-size: 2.4rem;
    line-height: 1.3;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--ag-text);
}

.ag-section-header p {
    font-size: 1.1rem;
    color: var(--ag-muted);
}

.ag-center {
    text-align: center;
    margin-top: 3rem;
}

.ag-feature-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: var(--ag-gradient);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.35);
}

.ag-page h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
    color: var(--ag-text);
}

.ag-page .ag-section p {
    color: var(--ag-muted);
}

/* 获客：成本对比 */
.ag-lead-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.ag-cost-card {
    background: #fff;
    border-radius: 20px;
    padding: 2.25rem;
    box-shadow: 0 15px 45px rgba(64, 60, 140, 0.12);
    border: 1px solid #eceefa;
}

.ag-page .ag-cost-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 1.75rem;
}

.ag-cost-row {
    margin-bottom: 1.5rem;
}

.ag-cost-label {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

.ag-cost-label strong {
    font-weight: 700;
}

.ag-highlight {
    color: var(--ag-secondary);
}

.ag-cost-track {
    height: 18px;
    border-radius: 999px;
    background: #f0f1f8;
    overflow: hidden;
}

.ag-cost-bar {
    height: 100%;
    width: 0;
    border-radius: 999px;
    transition: width 1.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.ag-cost-bar-trad {
    background: linear-gradient(90deg, #c4c8dc, #9aa0bd);
}

.ag-cost-bar-ai {
    background: var(--ag-gradient);
    transition-delay: 0.4s;
}

.ag-cost-card.ag-visible .ag-cost-bar-trad { width: 100%; }
.ag-cost-card.ag-visible .ag-cost-bar-ai { width: 20%; }

.ag-cost-save {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 2rem;
    padding: 1rem 1.25rem;
    border-radius: 14px;
    background: rgba(102, 126, 234, 0.08);
    font-weight: 600;
}

.ag-cost-save-num {
    font-size: 2rem;
    font-weight: 700;
    background: var(--ag-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.ag-page .ag-cost-note {
    font-size: 0.8rem;
    color: #9aa0bd;
    margin-top: 0.9rem;
}

.ag-feature-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.ag-feature {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

/* 客服：卡片 */
.ag-cs-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.75rem;
}

.ag-cs-card {
    background: #fff;
    border-radius: 18px;
    padding: 2rem 1.75rem;
    border: 1px solid #eceefa;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.ag-cs-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 18px 40px rgba(64, 60, 140, 0.12);
}

.ag-cs-card .ag-feature-icon {
    margin-bottom: 1.25rem;
}

/* 闭环 */
.ag-loop {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    position: relative;
}

.ag-loop-step {
    position: relative;
    text-align: center;
    padding: 2rem 1.25rem;
    border-radius: 18px;
    background: #f7f8fd;
}

.ag-loop-step:not(:last-child)::after {
    content: '\f054';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    right: -1.1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--ag-primary);
    z-index: 1;
}

.ag-loop-num {
    position: absolute;
    top: 12px;
    left: 16px;
    font-size: 0.85rem;
    font-weight: 700;
    color: rgba(118, 75, 162, 0.45);
}

.ag-loop-step > i {
    font-size: 2rem;
    margin-bottom: 1rem;
    background: var(--ag-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 上线步骤 */
.ag-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.ag-step {
    background: #fff;
    border-radius: 18px;
    padding: 2.25rem 1.75rem;
    border: 1px solid #eceefa;
}

.ag-step-num {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 2px solid var(--ag-primary);
    color: var(--ag-primary);
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
}

/* 联系表单 */
.ag-select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    background: #fff;
    color: #333;
}

.ag-select:focus {
    outline: none;
    border-color: #667eea;
}

/* 进入视窗动画 */
.ag-reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.ag-reveal.ag-visible {
    opacity: 1;
    transform: translateY(0);
}

.ag-cs-card.ag-reveal.ag-visible:hover {
    transform: translateY(-6px);
}

/* styles.css 在繁体下会重置所有元素的 font-weight */
.ag-page .ag-badge,
.ag-page .ag-tag,
.ag-page .ag-cost-save {
    font-weight: 600;
}

.ag-page .fas {
    font-weight: 900;
}

.ag-page .ag-loop-num,
.ag-page .ag-step-num,
.ag-page .ag-cost-save-num,
.ag-page .ag-chat-header strong,
.ag-page .ag-lead-chip strong {
    font-weight: 700;
}

/* 响应式 */
@media (max-width: 992px) {
    .ag-hero-grid,
    .ag-lead-grid {
        grid-template-columns: 1fr;
    }

    .ag-hero-grid {
        gap: 4rem;
    }

    .ag-cs-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .ag-loop {
        grid-template-columns: repeat(2, 1fr);
    }

    .ag-loop-step::after {
        display: none;
    }
}

@media (max-width: 768px) {
    .ag-hero {
        padding: 120px 0 80px;
        text-align: center;
    }

    .ag-page .ag-hero-title {
        font-size: 2.2rem;
    }

    .ag-hero-desc {
        margin-left: auto;
        margin-right: auto;
    }

    .ag-hero-buttons,
    .ag-hero-stats {
        justify-content: center;
    }

    .ag-hero-visual {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    .ag-lead-chip {
        position: static;
        animation: none;
        text-align: left;
    }

    .ag-section {
        padding: 70px 0;
    }

    .ag-page .ag-section-header h2 {
        font-size: 1.8rem;
    }

    .ag-cs-grid,
    .ag-steps {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .ag-page .ag-hero-title {
        font-size: 1.8rem;
    }

    .ag-hero-stats {
        gap: 1.5rem;
    }

    .ag-hero-stat strong {
        font-size: 1.6rem;
    }

    .ag-loop {
        grid-template-columns: 1fr;
    }

    .ag-cost-card {
        padding: 1.5rem;
    }
}