/* ============================================
   百抖AI官网 · GEO营销页独有样式 geo.css
   覆盖：内页头图（紫） / 核心理念 / 关键指标 /
         五步价值体系 / 核心能力 / 全域分发 Logo /
         AI 平台矩阵 / 响应式
   ============================================ */

/* ====== Page Hero（紫罗兰主题） ====== */
.page-hero {
    background:
        radial-gradient(760px 420px at 82% 30%, rgba(168, 85, 247, .4), transparent 60%),
        repeating-radial-gradient(circle at 84% 38%, rgba(196, 181, 253, .1) 0 1px, transparent 1px 46px),
        radial-gradient(560px 380px at 12% 80%, rgba(91, 33, 182, .45), transparent 65%),
        linear-gradient(125deg, #14063d 0%, #3b1d8f 55%, #6d28d9 100%);
}

/* ====== 核心理念亮点框 ====== */
.highlight-box {
    background: linear-gradient(135deg, #f0f6ff 0%, #f7f3ff 100%);
    border: 1px solid rgba(37, 99, 235, .14);
    border-radius: 14px;
    padding: 26px 30px;
    display: flex;
    gap: 22px;
    align-items: flex-start;
    box-shadow: 0 4px 20px rgba(37, 99, 235, .05);
    transition: all .3s;
}

.highlight-box:hover {
    box-shadow: 0 10px 30px rgba(37, 99, 235, .1);
    border-color: rgba(37, 99, 235, .28);
}

.highlight-box .hl-icon {
    font-size: 2rem;
    flex-shrink: 0;
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, #eff6ff, #ede9fe);
}

.highlight-box .hl-text {
    font-size: 15px;
    color: var(--gray-700);
    line-height: 1.85;
}

.highlight-box .hl-text strong {
    color: #6d28d9;
    font-weight: 700;
}

/* ====== 关键指标 ====== */
.stat-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-top: 44px;
}

.stat-card {
    background: linear-gradient(180deg, #fff 0%, rgba(239, 246, 255, .6) 100%);
    border-radius: 12px;
    padding: 34px 16px;
    text-align: center;
    border: 1px solid rgba(37, 99, 235, .12);
    box-shadow: 0 2px 12px rgba(37, 99, 235, .04);
    transition: all .3s;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(37, 99, 235, .1);
    border-color: rgba(37, 99, 235, .22);
}

.stat-card .stat-number {
    display: block;
    font-size: clamp(26px, 2.6vw, 34px);
    font-weight: 800;
    color: var(--blue);
    line-height: 1.2;
    margin-bottom: 6px;
}

.stat-card .stat-label {
    font-size: 13px;
    color: var(--gray-500);
}

/* ====== 五步闭环价值体系 ====== */
.five-step-row {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
    position: relative;
}

.five-step-card {
    position: relative;
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: 14px;
    padding: 28px 20px 22px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: all .3s;
    box-shadow: 0 1px 4px rgba(0, 0, 0, .04);
}

.five-step-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--blue), #8b5cf6);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .35s;
}

.five-step-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 14px 36px rgba(37, 99, 235, .1);
    border-color: #c7d2fe;
}

.five-step-card:hover::before {
    transform: scaleX(1);
}

.five-step-num {
    position: absolute;
    top: 10px;
    right: 16px;
    font-size: 2.8rem;
    font-weight: 800;
    background: linear-gradient(90deg, #6d28d9, #2563eb);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    opacity: .14;
    line-height: 1;
    pointer-events: none;
}

.five-step-title {
    font-size: 20px;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 4px;
    position: relative;
    z-index: 1;
}

.five-step-subtitle {
    font-size: 13px;
    color: var(--blue);
    font-weight: 600;
    margin-bottom: 2px;
    line-height: 1.4;
}

.five-step-tagline {
    font-size: 12px;
    color: var(--gray-300);
    font-style: italic;
    margin-bottom: 14px;
    letter-spacing: .5px;
}

.five-step-pill {
    display: inline-block;
    padding: 5px 12px;
    background: var(--blue-light);
    border: 1px solid #dbeafe;
    border-radius: 34px;
    color: var(--blue);
    font-size: 12px;
    margin: 3px 4px 3px 0;
    line-height: 1.5;
    width: 46.7%;
    text-align: center;
    font-weight: 500;
}

.five-step-pill2 {
    display: inline-block;
    padding: 5px 12px;
    background: var(--blue-light);
    border: 1px solid #dbeafe;
    border-radius: 34px;
    color: var(--blue);
    font-size: 12px;
    margin: 3px 4px 3px 0;
    line-height: 1.5;
    width: 46.7%;
    text-align: center;
    font-weight: 500;
}

.five-step-cat {
    margin-top: 10px;
}

.five-step-cat-label {
    display: inline-block;
    padding: 3px 12px;
    background: linear-gradient(270deg, rgba(37, 99, 235, .1), rgba(109, 40, 217, .1));
    border-radius: 34px;
    color: #6d28d9;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 5px;
}

.five-step-cat-text {
    font-size: 12px;
    color: var(--gray-500);
    line-height: 1.7;
    padding-left: 4px;
}

.five-step-section {
    text-align: center;
    margin: 10px 0 5px;
    font-size: 13px;
    font-weight: 700;
    color: var(--gray-900);
    background: linear-gradient(90deg, rgba(109, 40, 217, .07), rgba(37, 99, 235, .07));
    padding: 5px 0;
    border-radius: 6px;
}

.five-step-pill-block {
    display: block;
    width: 100%;
    box-sizing: border-box;
    text-align: center;
    padding: 8px 10px;
    background: linear-gradient(270deg, #2563eb 0%, #6d28d9 100%);
    border-radius: 34px;
    color: #fff;
    font-size: 13px;
    font-weight: 500;
    margin: 20px 0 15px;
    line-height: 1.6;
    box-shadow: 0 3px 10px rgba(37, 99, 235, .18);
    transition: all .3s ease;
    letter-spacing: .5px;
}

.five-step-pill-block:hover {
    transform: translateY(-1px);
    box-shadow: 0 5px 14px rgba(37, 99, 235, .28);
    opacity: .92;
}

/* ====== 核心能力 ====== */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.feature-card {
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: 14px;
    padding: 30px 24px;
    transition: all .3s;
    display: flex;
    flex-direction: column;
    gap: 12px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 1px 4px rgba(0, 0, 0, .04);
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 14px 36px rgba(37, 99, 235, .1);
    border-color: #c7d2fe;
}

.feature-card::after {
    content: "";
    position: absolute;
    right: -40px;
    bottom: -40px;
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: rgba(109, 40, 217, .03);
    pointer-events: none;
}

.feature-card .feat-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    font-size: 24px;
    background: linear-gradient(135deg, #eff6ff, #ede9fe);
    flex-shrink: 0;
}

.feature-card .feat-label {
    font-size: 12px;
    font-weight: 700;
    color: #6d28d9;
    letter-spacing: .5px;
}

.feature-card .feat-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-900);
}

.feature-card .feat-desc {
    font-size: 14px;
    color: var(--gray-500);
    line-height: 1.7;
}

/* ====== 全域分发 Logo 网格 ====== */
.logo-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 12px;
}

.logo-item {
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: 12px;
    padding: 14px 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 78px;
    transition: all .3s ease;
    box-shadow: 0 1px 3px rgba(0, 0, 0, .03);
}

.logo-item:hover {
    border-color: #c7d2fe;
    box-shadow: 0 8px 24px rgba(37, 99, 235, .08);
    transform: translateY(-3px);
}

.logo-item img {
    max-height: 46px;
    max-width: 100%;
    width: auto;
    object-fit: contain;
}

/* ====== AI 平台覆盖矩阵 ====== */
.platform-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
}

.platform-card {
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: 12px;
    padding: 22px 14px;
    text-align: center;
    transition: all .3s ease;
    box-shadow: 0 1px 3px rgba(0, 0, 0, .03);
}

.platform-card:hover {
    border-color: #c7d2fe;
    box-shadow: 0 8px 24px rgba(37, 99, 235, .08);
    transform: translateY(-3px);
}

.platform-card .pf-name {
    font-size: 15px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 6px;
}

.platform-card .pf-status {
    font-size: 12px;
    color: #6d28d9;
    margin-bottom: 6px;
    font-weight: 600;
}

.platform-card .pf-detail {
    font-size: 12px;
    color: var(--gray-300);
}

/* ====== GEO 页响应式 ====== */
@media(max-width:1024px) {
    .stat-row {
        grid-template-columns: repeat(2, 1fr);
    }

    .five-step-row {
        grid-template-columns: repeat(3, 1fr);
    }

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

    .logo-grid {
        grid-template-columns: repeat(4, 1fr);
    }

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

@media(max-width:860px) {
    .logo-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media(max-width:720px) {
    .five-step-row {
        grid-template-columns: 1fr;
    }

    .feature-grid {
        grid-template-columns: 1fr;
    }

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

    .platform-grid {
        grid-template-columns: 1fr;
    }

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