/* ============================================================
   ai.css - 集智 AI 页独立样式
   仅应用于 /ai.php，不依赖其他业务 CSS
   ============================================================ */

/* ============ Hero ============ */
.ai-hero {
    background: linear-gradient(135deg, #fff6f7 0%, #ffffff 45%, #fbf7ff 100%);
    color: #111827;
    padding: 60px 0 80px;
    position: relative;
    overflow: hidden;
}
.ai-hero::before {
    content: "";
    position: absolute;
    width: 560px;
    height: 560px;
    right: -140px;
    top: -140px;
    background: radial-gradient(circle, rgba(200, 16, 46, 0.07) 0%, rgba(200, 16, 46, 0.02) 45%, transparent 70%);
    pointer-events: none;
}
.ai-hero::after {
    content: "";
    position: absolute;
    width: 480px;
    height: 480px;
    left: -120px;
    bottom: -160px;
    background: radial-gradient(circle, rgba(120, 110, 255, 0.06) 0%, transparent 65%);
    pointer-events: none;
}

.ai-hero-inner {
    display: grid;
    grid-template-columns: 1.05fr 1fr;
    gap: 48px;
    align-items: center;
    position: relative;
    z-index: 1;
}

/* 左半边 */
.ai-hero-left .ai-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(200, 16, 46, 0.08);
    color: #C8102E;
    font-size: 12px;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 4px;
    letter-spacing: 0.05em;
}
.ai-hero-left .ai-chip-dot {
    width: 5px;
    height: 5px;
    background: #C8102E;
    border-radius: 50%;
}

.ai-hero-title {
    font-size: 32px;
    font-weight: 700;
    margin: 14px 0 16px;
    color: #111827;
    line-height: 1.3;
    letter-spacing: -0.01em;
}

.ai-hero-redlead {
    font-size: 18px;
    font-weight: 700;
    color: #C8102E;
    line-height: 1.6;
    margin-bottom: 18px;
    max-width: 560px;
}
.ai-hero-redlead strong {
    color: #C8102E;
    font-weight: 800;
}

.ai-hero-desc {
    color: #4b5563;
    font-size: 13.5px;
    line-height: 1.95;
    max-width: 580px;
    margin: 0 0 24px;
}

.ai-hero-btns {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 22px;
}
.ai-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 11px 22px;
    border-radius: 6px;
    font-size: 13.5px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s ease;
    text-decoration: none;
    border: 1px solid transparent;
    white-space: nowrap;
}
.ai-btn-primary {
    background: #C8102E;
    color: #fff;
    box-shadow: 0 6px 18px rgba(200, 16, 46, 0.22);
}
.ai-btn-primary:hover {
    background: #a40d26;
    transform: translateY(-1px);
    box-shadow: 0 10px 24px rgba(200, 16, 46, 0.28);
}
.ai-btn-ghost {
    background: #fff;
    color: #C8102E;
    border-color: rgba(200, 16, 46, 0.35);
}
.ai-btn-ghost:hover {
    border-color: #C8102E;
    background: rgba(200, 16, 46, 0.04);
}

.ai-hero-foot {
    font-size: 12px;
    color: #9ca3af;
    margin: 0;
    line-height: 1.7;
}

/* 右半边：品牌资产驾驶舱卡片 */
.ai-hero-right {
    display: flex;
    justify-content: center;
}
.ai-card {
    width: 100%;
    max-width: 500px;
    background: #fff;
    border: 1px solid rgba(17, 24, 39, 0.08);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 22px 50px rgba(17, 24, 39, 0.10), 0 8px 20px rgba(17, 24, 39, 0.06);
}

.ai-card-head {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: #fafafa;
    border-bottom: 1px solid rgba(17, 24, 39, 0.06);
}
.ai-card-dots {
    display: flex;
    gap: 6px;
}
.ai-card-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: block;
}
.ai-card-title {
    font-size: 12.5px;
    color: #6b7280;
    margin-left: 4px;
    font-weight: 500;
}

/* 驾驶舱 2x2 格子 */
.ai-dash {
    padding: 24px 26px 28px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}
.ai-dash-cell {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 14px 14px 12px;
    border: 1px solid rgba(17, 24, 39, 0.08);
    border-radius: 10px;
    background: #fff;
}
.ai-dash-name {
    font-size: 12.5px;
    font-weight: 600;
    color: #111827;
    letter-spacing: 0.01em;
}
.ai-dash-tag {
    font-size: 12.5px;
    font-weight: 700;
    color: #C8102E;
    line-height: 1.3;
    align-self: flex-start;
}
.ai-dash-tag--ok {
    color: #C8102E;
}
.ai-dash-bar {
    width: 100%;
    height: 9px;
    background: rgba(200, 16, 46, 0.10);
    border-radius: 999px;
    overflow: visible;
    position: relative;
}
.ai-dash-fill {
    display: block;
    height: 100%;
    background: linear-gradient(90deg, #C8102E 0%, #e32a46 100%);
    border-radius: 999px;
    transition: width 0.6s ease;
    position: relative;
}
/* 竞品动态进度条末端的圆点 */
.ai-dash-fill--dot::after {
    content: "";
    position: absolute;
    right: -6px;
    top: 50%;
    transform: translateY(-50%);
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #fff;
    border: 3px solid #C8102E;
    box-shadow: 0 2px 6px rgba(200, 16, 46, 0.25);
}

/* Hero 响应式 */
@media (max-width: 1024px) {
    .ai-hero-inner { grid-template-columns: 1fr; gap: 42px; }
    .ai-hero-right { order: -1; } /* 移动端卡片在上，文字在下 */
    .ai-card { max-width: 460px; margin: 0 auto; }
}
@media (max-width: 640px) {
    .ai-hero { padding: 40px 0 52px; }
    .ai-hero-title { font-size: 24px; margin-bottom: 14px; }
    .ai-hero-redlead { font-size: 15px; }
    .ai-hero-desc { font-size: 13px; }
    .ai-btn { padding: 10px 18px; font-size: 13px; }
    .ai-dash { padding: 18px 16px 22px; gap: 12px; }
    .ai-dash-cell { padding: 12px; }
    .ai-dash-name { font-size: 12px; }
    .ai-dash-tag { font-size: 12px; }
}

/* ============ 痛点模块 PAIN POINTS ============ */
.ai-pain {
    background: #fff;
    padding: 60px 0 50px;
    position: relative;
}
.ai-pain-head {
    text-align: center;
    margin-bottom: 36px;
}
.ai-pain-eyebrow {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.2em;
    color: #C8102E;
    margin-bottom: 14px;
}
.ai-pain-title {
    font-size: 24px;
    font-weight: 700;
    color: #111827;
    line-height: 1.45;
    margin: 0;
    max-width: 780px;
    margin-left: auto;
    margin-right: auto;
}
.ai-pain-title strong {
    color: #111827;
    font-weight: 800;
}

.ai-pain-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px 18px;
    margin-bottom: 30px;
}
.ai-pain-card {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 18px 18px 20px;
    border: 1px solid rgba(17, 24, 39, 0.08);
    border-radius: 12px;
    background: #fff;
    transition: all 0.25s ease;
}
.ai-pain-card:hover {
    border-color: rgba(200, 16, 46, 0.35);
    box-shadow: 0 10px 22px rgba(200, 16, 46, 0.06), 0 4px 10px rgba(17, 24, 39, 0.04);
    transform: translateY(-2px);
}
.ai-pain-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: rgba(200, 16, 46, 0.08);
    border-radius: 6px;
    color: #C8102E;
}
.ai-pain-name {
    font-size: 14.5px;
    font-weight: 600;
    color: #111827;
    line-height: 1.5;
    margin: 2px 0 0;
}
.ai-pain-desc {
    font-size: 12.5px;
    color: #6b7280;
    line-height: 1.8;
    margin: 0;
}

/* 底部渐变总结条 */
.ai-pain-foot {
    width: 100%;
    margin: 0 auto;
    padding: 16px 28px;
    text-align: center;
    border-radius: 10px;
    background: linear-gradient(90deg,
        rgba(200, 16, 46, 0.08) 0%,
        rgba(255, 220, 240, 0.35) 40%,
        rgba(220, 230, 255, 0.45) 60%,
        rgba(120, 110, 255, 0.10) 100%);
}
.ai-pain-foot span {
    font-size: 13px;
    color: #4b5563;
    line-height: 1.7;
    font-weight: 500;
    letter-spacing: 0.01em;
}

/* Pain 响应式 */
@media (max-width: 1024px) {
    .ai-pain-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
    .ai-pain { padding: 46px 0 38px; }
    .ai-pain-title { font-size: 19px; }
    .ai-pain-head { margin-bottom: 28px; }
    .ai-pain-grid { grid-template-columns: 1fr; gap: 14px; margin-bottom: 24px; }
    .ai-pain-card { padding: 16px; }
    .ai-pain-name { font-size: 14px; }
    .ai-pain-foot { padding: 14px 18px; border-radius: 10px; }
    .ai-pain-foot span { font-size: 12.5px; }
}

/* ============ 产品定义 PRODUCT DEFINITION ============ */
.ai-def {
    background: #fff;
    padding: 50px 0 54px;
    position: relative;
}
.ai-def-head {
    text-align: center;
    margin-bottom: 28px;
}
.ai-def-eyebrow {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.2em;
    color: #C8102E;
    margin-bottom: 12px;
}
.ai-def-title {
    font-size: 26px;
    font-weight: 700;
    color: #111827;
    line-height: 1.4;
    margin: 0;
    max-width: 760px;
    margin-left: auto;
    margin-right: auto;
}

.ai-def-bar {
    width: 100%;
    padding: 22px 34px;
    text-align: center;
    border-radius: 12px;
    background: linear-gradient(90deg,
        rgba(200, 16, 46, 0.08) 0%,
        rgba(255, 220, 240, 0.35) 35%,
        rgba(232, 238, 255, 0.35) 65%,
        rgba(120, 110, 255, 0.10) 100%);
    font-size: 13.5px;
    line-height: 1.9;
    color: #4b5563;
    font-weight: 500;
    margin-bottom: 34px;
}

.ai-def-flow {
    display: flex;
    align-items: stretch;
    justify-content: space-between;
    gap: 10px;
    flex-wrap: nowrap;
    margin-bottom: 22px;
}
.ai-def-step {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #C8102E;
    border: 1px solid #C8102E;
    color: #fff;
    border-radius: 999px;
    padding: 10px 18px 10px 10px;
    font-size: 12.5px;
    font-weight: 700;
    line-height: 1;
    white-space: nowrap;
    flex: 0 0 auto;
    box-shadow: 0 6px 16px rgba(200, 16, 46, 0.22);
}
.ai-def-stepnum {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    min-width: 24px;
    min-height: 24px;
    border-radius: 50%;
    background: #fff;
    color: #C8102E;
    font-size: 13px;
    font-weight: 800;
    line-height: 24px;
    text-align: center;
    text-indent: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    flex-shrink: 0;
    overflow: hidden;
}
.ai-def-stepname {
    padding-top: 1px;
    letter-spacing: 0.02em;
}
.ai-def-arrow {
    display: inline-flex;
    align-items: center;
    flex: 1 1 auto;
    min-width: 16px;
    justify-content: center;
    color: #C8102E;
}

.ai-def-foot {
    text-align: center;
    margin: 0 auto;
    color: #6b7280;
    font-size: 12.5px;
    line-height: 1.85;
    font-weight: 500;
    max-width: 720px;
}

/* Definition 响应式 */
@media (max-width: 1024px) {
    .ai-def-flow {
        flex-wrap: wrap;
        justify-content: center;
        row-gap: 10px;
    }
    .ai-def-arrow {
        flex: 0 0 16px;
    }
    .ai-def-arrow:nth-last-child(2) {
        display: none;
    }
}
@media (max-width: 640px) {
    .ai-def { padding: 40px 0 44px; }
    .ai-def-title { font-size: 20px; }
    .ai-def-bar { padding: 16px 20px; font-size: 12.5px; }
    .ai-def-step { padding: 9px 16px 9px 9px; font-size: 12px; }
    .ai-def-stepnum {
        width: 22px; height: 22px;
        min-width: 22px; min-height: 22px;
        line-height: 22px;
        font-size: 12px;
    }
    .ai-def-flow { margin-bottom: 18px; }
}

/* ============ 场景 SCENARIOS ============ */
.ai-scen {
    background: #fff;
    padding: 18px 0 56px;
    position: relative;
}
.ai-scen-head {
    text-align: center;
    margin-bottom: 34px;
}
.ai-scen-eyebrow {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.2em;
    color: #C8102E;
    margin-bottom: 12px;
}
.ai-scen-title {
    font-size: 24px;
    font-weight: 700;
    color: #111827;
    line-height: 1.45;
    margin: 0;
    max-width: 780px;
    margin-left: auto;
    margin-right: auto;
}

.ai-scen-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px 18px;
}
.ai-scen-card {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 18px 18px 20px;
    border: 1px solid rgba(17, 24, 39, 0.08);
    border-radius: 12px;
    background: #fff;
    transition: all 0.25s ease;
}
.ai-scen-card:hover {
    border-color: rgba(200, 16, 46, 0.35);
    box-shadow: 0 10px 24px rgba(200, 16, 46, 0.06), 0 4px 10px rgba(17, 24, 39, 0.04);
    transform: translateY(-2px);
}
.ai-scen-top {
    display: flex;
    align-items: baseline;
    gap: 10px;
    margin-bottom: 2px;
}
.ai-scen-num {
    font-size: 13px;
    font-weight: 700;
    color: #C8102E;
    letter-spacing: 0.03em;
    line-height: 1;
}
.ai-scen-name {
    font-size: 14.5px;
    font-weight: 600;
    color: #111827;
    line-height: 1.5;
    margin: 0;
}
.ai-scen-desc {
    font-size: 12.5px;
    color: #6b7280;
    line-height: 1.85;
    margin: 0;
    flex: 1;
}
.ai-scen-link {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    align-self: flex-start;
    font-size: 12px;
    font-weight: 600;
    color: #C8102E;
    text-decoration: none;
    margin-top: 2px;
    transition: transform 0.2s ease;
}
.ai-scen-link:hover {
    transform: translateX(2px);
}

/* Scenarios 响应式 */
@media (max-width: 1024px) {
    .ai-scen-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
    .ai-scen { padding: 14px 0 44px; }
    .ai-scen-title { font-size: 19px; }
    .ai-scen-head { margin-bottom: 26px; }
    .ai-scen-grid { grid-template-columns: 1fr; gap: 14px; }
    .ai-scen-card { padding: 16px; }
    .ai-scen-name { font-size: 14px; }
}

/* ============ 系统架构 SYSTEM ARCHITECTURE ============ */
.ai-sa {
    background: #fff;
    padding: 16px 0 60px;
    position: relative;
}
.ai-sa-head {
    text-align: center;
    margin-bottom: 40px;
}
.ai-sa-eyebrow {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.2em;
    color: #C8102E;
    margin-bottom: 12px;
}
.ai-sa-title {
    font-size: 26px;
    font-weight: 700;
    color: #111827;
    line-height: 1.4;
    margin: 0;
    max-width: 760px;
    margin-left: auto;
    margin-right: auto;
}

.ai-sa-list {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 18px;
    padding-left: 0;  /* 取消40px的左缩进，让胶囊宽度=list宽度=container安全区宽度 */
}

.ai-sa-row {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 360px) 1fr auto;
    align-items: center;
    gap: 24px;
    padding: 18px 26px 18px 22px;
    border-radius: 14px;
    border: 1px solid rgba(17, 24, 39, 0.08);
    background: #fff;
    transition: all 0.25s ease;
    z-index: 1;
    /* row 完全占满 list（100%宽），不再被左缩进挤压 */
    width: 100%;
    margin-left: 0;
}
.ai-sa-row:first-child {
    border-top: 1px solid rgba(17, 24, 39, 0.08);
}
.ai-sa-row:hover {
    border-color: rgba(200, 16, 46, 0.3);
    box-shadow: 0 10px 26px rgba(200, 16, 46, 0.06), 0 4px 10px rgba(17, 24, 39, 0.04);
    transform: translateY(-1px);
}

/* ===== 每个胶囊（末行除外）底部的独立短竖线 ===== */
/* 圆心x = list左边缘 + 16 (半 32圆)
   row padding-box 原点 = list左 + row.padding-left(22)
   → left = 16 - 22 = -6px ✔️ */
.ai-sa-row:not(:last-child)::after {
    content: "";
    position: absolute;
    left: -6px;
    bottom: -18px;
    width: 2px;
    height: 18px;
    background: #C8102E;
    opacity: 0.65;
    border-radius: 2px;
    z-index: 0;
}
.ai-sa-row:last-child::after {
    display: none;
}

.ai-sa-left {
    display: flex;
    align-items: center;
    gap: 14px;
    min-width: 0;
    margin-left: 0;
    padding-left: 0;
    position: static;
}
/* L 圆 absolute 放在胶囊左侧外部，不占用胶囊宽度。
   圆心 = list 左 + 16 → L 圆左边缘 = list 左
   row padding-box 原点 = list 左 + 22
   → left = 0 - 22 = -22px ✔️ */
.ai-sa-num {
    position: absolute;
    left: -22px;
    top: 50%;
    transform: translateY(-50%);
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    min-width: 32px;
    min-height: 32px;
    border-radius: 50%;
    background: #C8102E;
    border: none;
    color: #fff;
    font-size: 13px;
    font-weight: 800;
    line-height: 32px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    letter-spacing: 0.04em;
    text-align: center;
    box-shadow: 0 4px 14px rgba(200, 16, 46, 0.22);
    z-index: 2;
}
.ai-sa-titlewrap {
    display: flex;
    align-items: baseline;
    gap: 6px;
    min-width: 0;
    flex-wrap: wrap;
}
.ai-sa-modname {
    font-size: 14.5px;
    font-weight: 600;
    color: #111827;
    line-height: 1.55;
    margin: 0;
    white-space: nowrap;
}
.ai-sa-dept {
    font-size: 12px;
    color: #9ca3af;
    font-weight: 500;
    line-height: 1.6;
    white-space: nowrap;
}
.ai-sa-desc {
    font-size: 12.5px;
    color: #6b7280;
    line-height: 1.85;
    margin: 0;
    padding: 0 6px;
    font-weight: 500;
}
.ai-sa-tag {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 7px 16px 8px;
    border-radius: 999px;
    background: #C8102E;
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    line-height: 1;
    letter-spacing: 0.04em;
    white-space: nowrap;
    box-shadow: 0 4px 12px rgba(200, 16, 46, 0.18);
}

.ai-sa-foot {
    text-align: center;
    margin-top: 34px;
    padding: 0 20px;
}
.ai-sa-foot span {
    display: inline-block;
    color: #C8102E;
    font-size: 12.5px;
    font-weight: 600;
    line-height: 1.6;
    letter-spacing: 0.03em;
}

/* SA 响应式 */
@media (max-width: 1180px) {
    .ai-sa-row {
        grid-template-columns: minmax(0, 300px) 1fr auto;
        gap: 18px;
    }
}
@media (max-width: 1024px) {
    .ai-sa-list {
        padding-left: 0;
        gap: 16px;
    }
    .ai-sa-row {
        grid-template-columns: minmax(0, 1fr) auto;
        grid-template-rows: auto auto;
        row-gap: 8px;
        column-gap: 14px;
        padding: 16px 22px 18px 18px;
    }
    /* 1024: row padding-left=18 → L圆圆心x=16
       → L圆left = 0 - 18 = -18px
       → 竖线left = 16 - 18 = -2px
       gap=16 → bottom:-16 height:16 */
    .ai-sa-num {
        left: -18px;
    }
    .ai-sa-row:not(:last-child)::after {
        left: -2px;
        bottom: -16px;
        height: 16px;
    }
    .ai-sa-left {
        grid-column: 1 / -1;
    }
    .ai-sa-desc {
        grid-column: 1 / 2;
        padding: 0;
    }
    .ai-sa-tag {
        grid-column: 2 / 3;
        grid-row: 2 / 3;
        align-self: start;
        margin-top: 2px;
    }
}
@media (max-width: 640px) {
    .ai-sa { padding: 14px 0 48px; }
    .ai-sa-title { font-size: 20px; }
    .ai-sa-head { margin-bottom: 28px; }

    .ai-sa-list {
        padding-left: 0;
        gap: 14px;
    }
    .ai-sa-row {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto;
        row-gap: 10px;
        padding: 14px 18px 16px;
        border-radius: 12px;
    }
    /* 640: row padding-left=18 L圆26→圆心x=13
       → L圆left = 0 - 18 = -18px
       → 竖线left = 13 - 18 = -5px
       gap=14 → bottom:-14, height:14 */
    .ai-sa-num {
        left: -18px;
        width: 26px; height: 26px; min-width: 26px; min-height: 26px;
        line-height: 26px;
        font-size: 11.5px;
        box-shadow: 0 3px 10px rgba(200, 16, 46, 0.22);
    }
    .ai-sa-row:not(:last-child)::after {
        left: -5px;
        bottom: -14px;
        height: 14px;
    }
    .ai-sa-left {
        /* no margin/padding left needed */
    }
    .ai-sa-desc {
        grid-column: 1 / -1;
    }
    .ai-sa-tag {
        grid-column: 1 / -1;
        grid-row: 3 / 4;
        justify-self: flex-start;
    }
    .ai-sa-modname { font-size: 14px; }
    .ai-sa-foot { margin-top: 26px; }
}
.ai-msg-body strong {
    color: #fff;
    font-weight: 600;
}

/* ============ 部署六步法 DEPLOYMENT ============ */
.ai-dep {
    background: #fff;
    padding: 16px 0 60px;
    position: relative;
}
.ai-dep-head {
    text-align: center;
    margin-bottom: 34px;
}
.ai-dep-eyebrow {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.2em;
    color: #C8102E;
    margin-bottom: 12px;
}
.ai-dep-title {
    font-size: 26px;
    font-weight: 700;
    color: #111827;
    line-height: 1.4;
    margin: 0;
    max-width: 760px;
    margin-left: auto;
    margin-right: auto;
}

.ai-dep-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px 18px;
    margin-bottom: 34px;
}
.ai-dep-card {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 18px 20px 18px;
    border: 1px solid rgba(17, 24, 39, 0.08);
    border-radius: 12px;
    background: #fff;
    transition: all 0.25s ease;
}
.ai-dep-card:hover {
    border-color: rgba(200, 16, 46, 0.3);
    box-shadow: 0 10px 26px rgba(200, 16, 46, 0.06), 0 4px 10px rgba(17, 24, 39, 0.04);
    transform: translateY(-1px);
}
.ai-dep-top {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 0;
}
.ai-dep-num {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    width: 42px;
    height: 30px;
    border-radius: 5px;      /* 红色方胶囊（小圆角方） */
    background: #C8102E;
    color: #fff;
    font-size: 13px;
    font-weight: 800;
    line-height: 30px;
    letter-spacing: 0.03em;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
.ai-dep-name {
    font-size: 14.5px;
    font-weight: 700;
    color: #111827;
    line-height: 1.55;
    margin: 0;
    letter-spacing: 0.01em;
}
.ai-dep-desc {
    font-size: 12.5px;
    color: #6b7280;
    line-height: 1.85;
    margin: 0;
    padding-right: 4px;
    flex: 1;
    font-weight: 500;
}
.ai-dep-foot {
    display: flex;
    align-items: center;
    gap: 8px;
    padding-top: 2px;
    flex-wrap: wrap;
}
.ai-dep-footpre {
    flex-shrink: 0;
    font-size: 11.5px;
    color: #9ca3af;
    font-weight: 500;
    line-height: 1;
}
.ai-dep-taglink {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    padding: 5px 14px 6px;
    background: #C8102E;
    border-radius: 999px;
    color: #fff;
    font-size: 11.5px;
    font-weight: 700;
    line-height: 1;
    text-decoration: none;
    letter-spacing: 0.02em;
    white-space: nowrap;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 3px 10px rgba(200, 16, 46, 0.18);
}
.ai-dep-taglink:hover {
    transform: translateX(2px);
    box-shadow: 0 5px 14px rgba(200, 16, 46, 0.28);
}

/* 底部渐变长条 */
.ai-dep-footbar {
    width: 100%;
    padding: 16px 28px;
    text-align: center;
    border-radius: 10px;
    background: linear-gradient(90deg,
        rgba(200, 16, 46, 0.08) 0%,
        rgba(255, 220, 240, 0.35) 35%,
        rgba(232, 238, 255, 0.35) 65%,
        rgba(120, 110, 255, 0.10) 100%);
}
.ai-dep-footbar span {
    font-size: 12.5px;
    font-weight: 500;
    color: #4b5563;
    line-height: 1.9;
}

/* DEP 响应式 */
@media (max-width: 1024px) {
    .ai-dep-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
    .ai-dep { padding: 14px 0 48px; }
    .ai-dep-title { font-size: 20px; }
    .ai-dep-head { margin-bottom: 28px; }
    .ai-dep-grid {
        grid-template-columns: 1fr;
        gap: 14px;
        margin-bottom: 24px;
    }
    .ai-dep-card { padding: 16px; }
    .ai-dep-num { width: 38px; height: 28px; line-height: 28px; font-size: 12px; border-radius: 4px; }
    .ai-dep-name { font-size: 14px; }
    .ai-dep-footbar { padding: 14px 20px; border-radius: 10px; }
    .ai-dep-footbar span { font-size: 12.5px; }
}

/* ============ 年度运行 ANNUAL OPERATION ============ */
.ai-ann {
    background: #fff;
    padding: 16px 0 60px;
    position: relative;
}
.ai-ann-head {
    text-align: center;
    margin-bottom: 34px;
}
.ai-ann-eyebrow {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.2em;
    color: #C8102E;
    margin-bottom: 12px;
}
.ai-ann-title {
    font-size: 26px;
    font-weight: 700;
    color: #111827;
    line-height: 1.4;
    margin: 0;
    max-width: 760px;
    margin-left: auto;
    margin-right: auto;
}

.ai-ann-table-wrap {
    border: 1px solid rgba(17, 24, 39, 0.1);
    border-radius: 14px;
    overflow: hidden;
    background: #fff;
    margin-bottom: 30px;
}
.ai-ann-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    table-layout: fixed;
}
/* 表头 */
.ai-ann-table thead th {
    background: #f7f7f8;
    padding: 18px 22px 19px;  /* 上下各增加 ~5px */
    text-align: left;
    font-size: 13px;
    font-weight: 700;
    color: #111827;
    letter-spacing: 0.02em;
    line-height: 1.5;
    border-bottom: 1px solid rgba(17, 24, 39, 0.08);
    border-right: 1px solid rgba(17, 24, 39, 0.06);
}
.ai-ann-table thead th:last-child {
    border-right: none;
}
.ai-ann-table .aath-freq {
    width: 18%;
    text-align: center;
}
.ai-ann-table .aath-auto { width: 32%; }
.ai-ann-table .aath-serv { width: 30%; }
.ai-ann-table .aath-gain { width: 20%; }

/* 单元格通用 — 行高增加一倍：padding翻倍 + 行高略放大 */
.ai-ann-table tbody td {
    padding: 32px 22px 33px;  /* 原 16/17 → 翻倍至 32/33 */
    font-size: 12.5px;
    line-height: 2.1;         /* 原 1.85 → 增大到 2.1 */
    color: #374151;
    vertical-align: middle;
    font-weight: 500;
    border-bottom: 1px solid rgba(17, 24, 39, 0.06);
    border-right: 1px solid rgba(17, 24, 39, 0.05);
}
.ai-ann-table tbody tr:last-child td {
    border-bottom: none;
}
.ai-ann-table tbody td:last-child {
    border-right: none;
}

/* 频率列（第一列）居中 + 红分隔线 */
.ai-ann-table .aatd-freq {
    text-align: center;
    padding: 32px 14px 33px;  /* 上下 padding 同步翻倍 */
    border-right: 2px solid rgba(200, 16, 46, 0.28);
}
.ai-ann-freqtag {
    display: inline-block;
    padding: 5px 14px 6px;
    background: #C8102E;
    color: #fff;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.06em;
    line-height: 1;
    white-space: nowrap;
    box-shadow: 0 3px 10px rgba(200, 16, 46, 0.18);
}

/* 客户得到列（第四列）全部红色字 */
.ai-ann-table .aatd-gain {
    color: #C8102E;
    font-weight: 600;
}

/* hover行 */
.ai-ann-table tbody tr.ai-ann-row:hover td {
    background: rgba(200, 16, 46, 0.025);
}

/* 底部渐变长条 */
.ai-ann-footbar {
    width: 100%;
    padding: 16px 28px;
    text-align: center;
    border-radius: 10px;
    background: linear-gradient(90deg,
        rgba(200, 16, 46, 0.08) 0%,
        rgba(255, 220, 240, 0.35) 35%,
        rgba(232, 238, 255, 0.35) 65%,
        rgba(120, 110, 255, 0.10) 100%);
}
.ai-ann-footbar span {
    font-size: 12.5px;
    font-weight: 500;
    color: #4b5563;
    line-height: 1.9;
}

/* ANN 响应式 */
@media (max-width: 1024px) {
    .ai-ann-table .aath-freq  { width: 20%; }
    .ai-ann-table .aath-auto  { width: 32%; }
    .ai-ann-table .aath-serv  { width: 28%; }
    .ai-ann-table .aath-gain  { width: 20%; }
    .ai-ann-table thead th,
    .ai-ann-table tbody td { padding-left: 16px; padding-right: 16px; }
    .ai-ann-table .aatd-freq { padding-left: 10px; padding-right: 10px; }
}
@media (max-width: 760px) {
    /* 移动端转卡片堆叠，方便阅读 */
    .ai-ann-table-wrap {
        border: none;
        background: transparent;
        border-radius: 0;
        overflow: visible;
    }
    .ai-ann-table { table-layout: auto; display: block; }
    .ai-ann-table thead { display: none; }
    .ai-ann-table tbody,
    .ai-ann-table tr,
    .ai-ann-table td {
        display: block;
        width: 100% !important;
    }
    .ai-ann-table tbody tr {
        background: #fff;
        border: 1px solid rgba(17, 24, 39, 0.08);
        border-radius: 12px;
        padding: 4px 18px 6px;
        margin-bottom: 14px;
    }
    .ai-ann-table tbody tr:last-child {
        margin-bottom: 0;
    }
    .ai-ann-table tbody td {
        border: none !important;
        border-bottom: 1px dashed rgba(17, 24, 39, 0.06) !important;
        padding: 12px 0 12px;
        display: flex;
        align-items: flex-start;
        gap: 10px;
    }
    .ai-ann-table tbody td:last-child {
        border-bottom: none !important;
    }
    .ai-ann-table tbody td::before {
        content: attr(data-label);
        flex-shrink: 0;
        min-width: 70px;
        font-weight: 700;
        color: #111827;
        font-size: 12px;
    }
    .ai-ann-table tbody td.aatd-freq::before { content: "频率"; }
    .ai-ann-table tbody td.aatd-auto::before { content: "系统自动完成"; }
    .ai-ann-table tbody td.aatd-serv::before { content: "集和人工服务"; }
    .ai-ann-table tbody td.aatd-gain::before { content: "客户得到"; }

    .ai-ann-table .aatd-freq {
        text-align: left;
    }

    .ai-ann { padding: 14px 0 48px; }
    .ai-ann-title { font-size: 20px; }
    .ai-ann-head { margin-bottom: 28px; }
    .ai-ann-table-wrap { margin-bottom: 24px; }
    .ai-ann-footbar { padding: 14px 20px; border-radius: 10px; }
    .ai-ann-footbar span { font-size: 12.5px; }
}

/* ============ 最终交付物 DELIVERABLES ============ */
.ai-del {
    background: #fafafa;  /* 浅色背景，与其他模块区分 */
    padding: 16px 0 60px;
    position: relative;
}
.ai-del-head {
    text-align: center;
    margin-bottom: 36px;
}
.ai-del-eyebrow {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.2em;
    color: #C8102E;
    margin-bottom: 12px;
}
.ai-del-title {
    font-size: 26px;
    font-weight: 700;
    color: #111827;
    line-height: 1.45;
    margin: 0;
    max-width: 860px;
    margin-left: auto;
    margin-right: auto;
}

/* 2 行 × 3 列网格 */
.ai-del-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
    margin-bottom: 28px;
}

/* 卡片：用 grid 让图标 + 标题在同一行，描述占满整行 */
.ai-del-card {
    background: #fff;
    border: 1px solid rgba(17, 24, 39, 0.10);
    border-radius: 10px;
    padding: 22px 24px 24px;
    display: grid;
    grid-template-columns: auto 1fr;   /* 第一列：图标宽度；第二列：标题（占剩余） */
    grid-template-rows: auto auto;      /* 第一行：图标+标题；第二行：描述 */
    column-gap: 12px;
    row-gap: 10px;
    transition: all 0.25s ease;
}
.ai-del-card:hover {
    border-color: rgba(200, 16, 46, 0.28);
    box-shadow: 0 8px 24px rgba(17, 24, 39, 0.05);
    transform: translateY(-1px);
}

/* 勾图标：grid 第一列 第一行 */
.ai-del-card-icon {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    grid-column: 1;
    grid-row: 1;
    margin: 0;
}
/* 标题：grid 第二列 第一行 — 与图标同一行，垂直居中 */
.ai-del-card-title {
    font-size: 14px;
    font-weight: 700;
    color: #111827;
    line-height: 1.5;
    letter-spacing: 0.01em;
    margin: 0;
    grid-column: 2;
    grid-row: 1;
    align-self: center;
}
/* 描述：grid 第1~N列，第二行 */
.ai-del-card-desc {
    font-size: 12.5px;
    font-weight: 400;
    color: #6b7280;
    line-height: 1.9;
    margin: 0;
    grid-column: 1 / -1;
    grid-row: 2;
}

/* 底部总结行 */
.ai-del-footline {
    text-align: center;
    font-size: 12.5px;
    font-weight: 500;
    color: #6b7280;
    line-height: 1.9;
    margin: 0 auto;
    max-width: 900px;
}

/* DEL 响应式 */
@media (max-width: 1024px) {
    .ai-del-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 16px;
    }
}
@media (max-width: 640px) {
    .ai-del { padding: 14px 0 48px; }
    .ai-del-title { font-size: 20px; }
    .ai-del-head { margin-bottom: 28px; }
    .ai-del-grid {
        grid-template-columns: 1fr;
        gap: 14px;
        margin-bottom: 24px;
    }
    .ai-del-card { padding: 18px 20px 20px; }
    .ai-del-card-icon {
        width: 32px;
        height: 32px;
    }
    .ai-del-card-icon svg { width: 18px; height: 18px; }
    .ai-del-footline { font-size: 12.5px; }
}

/* ============ 差异对比 DIFFERENCE ============ */
.ai-diff {
    background: #fff;
    padding: 16px 0 60px;
    position: relative;
}
.ai-diff-head {
    text-align: center;
    margin-bottom: 34px;
}
.ai-diff-eyebrow {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.2em;
    color: #C8102E;
    margin-bottom: 12px;
}
.ai-diff-title {
    font-size: 26px;
    font-weight: 700;
    color: #111827;
    line-height: 1.45;
    margin: 0;
    max-width: 860px;
    margin-left: auto;
    margin-right: auto;
}

/* 表格外框 — 整体圆角 + 外边框 */
.ai-diff-table-wrap {
    border-radius: 14px;
    overflow: hidden;
    background: #fff;
    border: 1px solid rgba(17, 24, 39, 0.10);  /* 整表外边框 */
    box-shadow: 0 1px 2px rgba(17, 24, 39, 0.04);
}
.ai-diff-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    table-layout: fixed;
}

/* 3 列宽：标签列(较窄) · 普通AI工具 · AI品牌系统 */
.aidiff-col-label  { width: 20%; }
.aidiff-col-normal { width: 40%; }
.aidiff-col-brand  { width: 40%; }

/* 表头：无外边框，但整个 AI品牌系统 列有粉红背景 + 顶部分隔红条 */
.ai-diff-table thead th {
    padding: 18px 26px 18px;
    font-size: 13px;
    font-weight: 700;
    line-height: 1.5;
    text-align: center;
    letter-spacing: 0.02em;
    vertical-align: middle;
    border-bottom: 1px solid rgba(17, 24, 39, 0.08);
}
/* 左侧标签格子空白（没写文字） */
.aidiff-h-label {
    color: transparent;
    background: transparent;
    border-right: 1px solid rgba(17, 24, 39, 0.06);
}
/* 普通AI工具：白底，黑字，右分隔线 */
.aidiff-h-normal {
    color: #111827;
    background: #fff;
    border-right: 1px solid rgba(17, 24, 39, 0.06);
}
/* AI品牌智能管理系统：粉红背景 + 顶部3px红色粗边（视觉分隔） */
.aidiff-h-brand {
    color: #C8102E;
    background: #fdf2f4;
    position: relative;
}
.aidiff-h-brand::before {
    content: "";
    position: absolute;
    left: 0; right: 0; top: 0;
    height: 3px;
    background: #C8102E;
}

/* 单元格通用 */
.ai-diff-table tbody td {
    padding: 18px 26px 19px;
    font-size: 12.5px;
    line-height: 1.9;
    color: #374151;
    font-weight: 500;
    vertical-align: middle;
    border-bottom: 1px solid rgba(17, 24, 39, 0.06);
}
.ai-diff-table tbody tr:last-child td {
    border-bottom: none;
}

/* 标签列（第一列） */
.aidiff-c-label {
    font-weight: 600;
    color: #111827;
    text-align: left;
    background: #fff;
    border-right: 1px solid rgba(17, 24, 39, 0.06);
}
/* 普通AI工具列（第二列）白底 */
.aidiff-c-normal {
    color: #4b5563;
    text-align: left;
    background: #fff;
    border-right: 1px solid rgba(17, 24, 39, 0.06);
}
/* AI品牌系统列（第三列）粉红底 + 红字 */
.aidiff-c-brand {
    color: #C8102E;
    font-weight: 600;
    text-align: left;
    background: #fdf2f4;
}

/* hover：AI品牌列微红高亮 */
.ai-diff-table tbody tr.aidiff-row:hover td.aidiff-c-brand,
.ai-diff-table tbody tr.aidiff-row:hover th.aidiff-h-brand {
    background: #fbe6ea;
}
.ai-diff-table tbody tr.aidiff-row:hover td.aidiff-c-normal,
.ai-diff-table tbody tr.aidiff-row:hover td.aidiff-c-label {
    background: #fafafa;
}

/* DIFF 响应式 */
@media (max-width: 1024px) {
    .aidiff-col-label  { width: 22%; }
    .aidiff-col-normal { width: 39%; }
    .aidiff-col-brand  { width: 39%; }
    .ai-diff-table thead th,
    .ai-diff-table tbody td {
        padding-left: 18px;
        padding-right: 18px;
    }
}
@media (max-width: 760px) {
    /* 移动端：转成卡片堆叠，每个维度一张卡片（标签+2列上下） */
    .ai-diff { padding: 14px 0 48px; }
    .ai-diff-title { font-size: 20px; }
    .ai-diff-head { margin-bottom: 28px; }

    .ai-diff-table-wrap {
        border-radius: 0;
        box-shadow: none;
        overflow: visible;
        background: transparent;
    }
    .ai-diff-table { display: block; table-layout: auto; }
    .ai-diff-table colgroup { display: none; }
    .ai-diff-table thead {
        display: grid;
        grid-template-columns: repeat(2, minmax(0,1fr));
        margin-bottom: 14px;
        border-radius: 10px;
        overflow: hidden;
        border: 1px solid rgba(17, 24, 39, 0.08);
    }
    .ai-diff-table thead tr { display: contents; }
    .ai-diff-table thead th.aidiff-h-label { display: none; }
    .ai-diff-table thead th.aidiff-h-normal,
    .ai-diff-table thead th.aidiff-h-brand {
        padding: 14px 16px;
        border: none !important;
        font-size: 12.5px;
        text-align: center;
        border-right: 1px solid rgba(17, 24, 39, 0.06) !important;
    }
    .ai-diff-table thead th.aidiff-h-brand {
        border-right: none !important;
    }
    .ai-diff-table tbody { display: block; }
    .ai-diff-table tbody tr.aidiff-row {
        display: block;
        background: #fff;
        border: 1px solid rgba(17, 24, 39, 0.08);
        border-radius: 12px;
        padding: 4px 18px 6px;
        margin-bottom: 14px;
    }
    .ai-diff-table tbody tr.aidiff-row:last-child { margin-bottom: 0; }
    .ai-diff-table tbody td {
        display: flex;
        width: 100% !important;
        flex-direction: column;
        padding: 12px 0 !important;
        border: none !important;
        border-bottom: 1px dashed rgba(17, 24, 39, 0.06) !important;
    }
    .ai-diff-table tbody td:last-child {
        border-bottom: none !important;
    }
    .ai-diff-table tbody td::before {
        font-weight: 700;
        color: #111827;
        font-size: 12px;
        margin-bottom: 4px;
    }
    .ai-diff-table tbody td.aidiff-c-label::before   { content: "维度"; }
    .ai-diff-table tbody td.aidiff-c-normal::before  { content: "普通AI工具"; }
    .ai-diff-table tbody td.aidiff-c-brand::before   { content: "AI品牌智能管理系统"; }
    /* 覆盖粉红底色为卡片局部背景 */
    .ai-diff-table tbody td.aidiff-c-brand {
        background: rgba(200, 16, 46, 0.04) !important;
        border-radius: 8px;
        padding-left: 14px !important;
        padding-right: 14px !important;
        margin-top: 4px;
    }
}

/* ============ 为什么选集和 WHY BICOBRAND ============ */
.ai-why {
    background: #fff;
    padding: 16px 0 60px;
    position: relative;
}
.ai-why-head {
    text-align: center;
    margin-bottom: 36px;
}
.ai-why-eyebrow {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.2em;
    color: #C8102E;
    margin-bottom: 12px;
}
.ai-why-title {
    font-size: 26px;
    font-weight: 700;
    color: #111827;
    line-height: 1.45;
    margin: 0;
    max-width: 860px;
    margin-left: auto;
    margin-right: auto;
}

/* 3 条理由 列表容器：宽度 = 安全区域（继承 container，不额外限宽） */
.ai-why-list {
    list-style: none;
    padding: 0;
    margin: 0 0 28px;         /* 去掉左右 auto：宽度与 container 对齐到安全区 */
    width: 100%;               /* 占满 container（安全区）宽度 */
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* 每一条：左侧图标框 + 右侧标题描述 */
.ai-why-item {
    background: #fff;
    border: 1px solid rgba(17, 24, 39, 0.10);
    border-radius: 12px;
    padding: 22px 26px 23px;
    display: flex;
    align-items: flex-start;
    gap: 18px;
    transition: all 0.25s ease;
}
.ai-why-item:hover {
    border-color: rgba(200, 16, 46, 0.28);
    box-shadow: 0 8px 24px rgba(17, 24, 39, 0.05);
    transform: translateY(-1px);
}

/* 图标外框：红色描边圆角方块（或背景色） */
.ai-why-icon {
    flex-shrink: 0;
    width: 46px;
    height: 46px;
    border-radius: 10px;
    background: #fff5f6;
    border: 1px solid rgba(200, 16, 46, 0.18);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-top: 2px;
}
.ai-why-icon svg { display: block; }

/* 右侧内容区 */
.ai-why-body {
    flex: 1 1 auto;
    min-width: 0;
}
.ai-why-name {
    font-size: 14.5px;
    font-weight: 700;
    color: #111827;
    line-height: 1.6;
    margin: 0 0 8px;
    letter-spacing: 0.01em;
}
.ai-why-desc {
    font-size: 12.5px;
    font-weight: 400;
    color: #6b7280;
    line-height: 2;
    margin: 0;
}

/* 底部红句总结 */
.ai-why-footline {
    text-align: center;
    font-size: 13px;
    font-weight: 600;
    color: #C8102E;
    line-height: 1.9;
    margin: 0 auto;
    max-width: 760px;
    letter-spacing: 0.02em;
}

/* WHY 响应式 */
@media (max-width: 640px) {
    .ai-why { padding: 14px 0 48px; }
    .ai-why-title { font-size: 20px; }
    .ai-why-head { margin-bottom: 28px; }
    .ai-why-list {
        gap: 14px;
        margin-bottom: 24px;
    }
    .ai-why-item {
        padding: 18px 20px 19px;
        gap: 14px;
    }
    .ai-why-icon {
        width: 40px;
        height: 40px;
        border-radius: 9px;
    }
    .ai-why-icon svg { width: 22px; height: 22px; }
    .ai-why-name { font-size: 14px; margin-bottom: 6px; }
    .ai-why-desc { font-size: 12.5px; line-height: 1.95; }
    .ai-why-footline { font-size: 12.5px; }
}

/* ============ 如何合作 COOPERATION ============ */
.ai-coop {
    background: #fff;
    padding: 16px 0 60px;
    position: relative;
}
.ai-coop-head {
    text-align: center;
    margin-bottom: 30px;
}
.ai-coop-eyebrow {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.2em;
    color: #C8102E;
    margin-bottom: 12px;
}
.ai-coop-title {
    font-size: 26px;
    font-weight: 700;
    color: #111827;
    line-height: 1.45;
    margin: 0;
    max-width: 860px;
    margin-left: auto;
    margin-right: auto;
}

/* 渐变介绍长条（左淡紫→右淡粉橙） */
.ai-coop-intro {
    border-radius: 12px;
    padding: 20px 30px 21px;
    margin-bottom: 32px;
    background: linear-gradient(90deg,
        rgba(232, 236, 255, 0.55) 0%,
        rgba(255, 240, 250, 0.75) 55%,
        rgba(255, 240, 230, 0.55) 100%);
    border: 1px solid rgba(180, 170, 255, 0.15);
}
.ai-coop-intro p {
    margin: 0;
    font-size: 13px;
    font-weight: 500;
    color: #4b5563;
    line-height: 2;
    text-align: center;
}

/* 4 列卡片网格 */
.ai-coop-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
    margin-bottom: 28px;
}

/* 单张卡片 */
.ai-coop-card {
    background: #fff;
    border: 1px solid rgba(17, 24, 39, 0.10);
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: all 0.25s ease;
}
.ai-coop-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(17, 24, 39, 0.06);
}

/* 卡片顶部（标题区） — 与 body 之间细灰线 */
.ai-coop-card-top {
    padding: 16px 20px 15px;
    border-bottom: 1px solid rgba(17, 24, 39, 0.06);
    background: #fff;
}
.ai-coop-card-name {
    font-size: 14px;
    font-weight: 700;
    color: #111827;
    line-height: 1.5;
    margin: 0;
    letter-spacing: 0.01em;
}

/* 卡片主体 */
.ai-coop-card-body {
    padding: 16px 20px 20px;
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.ai-coop-card-line {
    margin: 0;
    font-size: 12px;
    font-weight: 400;
    color: #6b7280;
    line-height: 1.9;
}

/* 第 4 张 — 专属部署：粉红边框+顶部红条高亮 */
.ai-coop-card--featured {
    border-color: rgba(200, 16, 46, 0.35);
    box-shadow: 0 0 0 1px rgba(200, 16, 46, 0.10);
}
.ai-coop-card--featured .ai-coop-card-top {
    background: #fff5f6;
    border-bottom: 1px solid rgba(200, 16, 46, 0.16);
    position: relative;
}
.ai-coop-card--featured .ai-coop-card-top::before {
    content: "";
    position: absolute;
    left: 0; right: 0; top: 0;
    height: 3px;
    background: #C8102E;
}
.ai-coop-card--featured .ai-coop-card-name {
    color: #C8102E;
}
.ai-coop-card--featured:hover {
    border-color: rgba(200, 16, 46, 0.55);
    box-shadow: 0 10px 30px rgba(200, 16, 46, 0.08);
}

/* 底部总结句 */
.ai-coop-footline {
    text-align: center;
    font-size: 12.5px;
    font-weight: 500;
    color: #6b7280;
    line-height: 1.9;
    margin: 0 auto;
    max-width: 900px;
}

/* COOP 响应式 */
@media (max-width: 1024px) {
    .ai-coop-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 16px;
    }
}
@media (max-width: 640px) {
    .ai-coop { padding: 14px 0 48px; }
    .ai-coop-title { font-size: 20px; }
    .ai-coop-head { margin-bottom: 26px; }

    .ai-coop-intro {
        padding: 16px 20px 17px;
        margin-bottom: 26px;
    }
    .ai-coop-intro p { font-size: 12.5px; line-height: 1.95; }

    .ai-coop-grid {
        grid-template-columns: 1fr;
        gap: 14px;
        margin-bottom: 24px;
    }
    .ai-coop-card-top    { padding: 14px 18px 13px; }
    .ai-coop-card-body   { padding: 14px 18px 18px; }
    .ai-coop-footline { font-size: 12.5px; }
}

/* ============ 联系申请 CONTACT ============ */
.ai-ctc {
    background: #fff;
    padding: 16px 0 64px;
    position: relative;
}
.ai-ctc-head {
    text-align: center;
    margin-bottom: 34px;
}
.ai-ctc-eyebrow {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.2em;
    color: #C8102E;
    margin-bottom: 12px;
}
.ai-ctc-title {
    font-size: 26px;
    font-weight: 700;
    color: #111827;
    line-height: 1.45;
    margin: 0 0 14px;
    max-width: 860px;
    margin-left: auto;
    margin-right: auto;
}
.ai-ctc-sub {
    margin: 0 auto;
    max-width: 880px;
    font-size: 13px;
    font-weight: 400;
    color: #6b7280;
    line-height: 2;
}

/* 左右两列布局：左宽（表单），右窄（联系） — Grid 默认 stretch 让两卡片等高 */
.ai-ctc-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 28px;
}

/* 左右卡片通用外观：白卡片 + 圆角 + 外边框 + flex 列（撑满 grid item 高度） */
.ai-ctc-form-box,
.ai-ctc-aside {
    background: #fff;
    border: 1px solid rgba(17, 24, 39, 0.10);
    border-radius: 14px;
    padding: 26px 28px 28px;
    display: flex;
    flex-direction: column;
    min-height: 100%;
}

/* 左侧：表单 — 让 <form> 吸满空间，标题贴顶、提交按钮贴底 */
.ai-ctc-form-title {
    font-size: 14.5px;
    font-weight: 700;
    color: #111827;
    margin: 0 0 18px;
    line-height: 1.5;
    letter-spacing: 0.01em;
}
.ai-ctc-form {
    display: flex;
    flex-direction: column;
    gap: 14px;
    flex: 1 1 auto;   /* 占据 form-box 中间高度 */
    min-height: 0;
}
/* 单行/双行 row */
.ai-ctc-row {
    display: flex;
    gap: 14px;
    flex-direction: column;
}
.ai-ctc-row--2 {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    flex-direction: initial;
}

/* 字段 */
.ai-ctc-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.ai-ctc-label {
    font-size: 12px;
    font-weight: 500;
    color: #111827;
    line-height: 1.5;
    letter-spacing: 0.01em;
}
.ai-ctc-label .req {
    color: #C8102E;
    font-style: normal;
    margin-left: 2px;
    font-weight: 700;
}

/* 输入框 / 下拉 */
.ai-ctc-input,
.ai-ctc-select {
    width: 100%;
    height: 42px;
    padding: 0 14px;
    background: #fff;
    border: 1px solid rgba(17, 24, 39, 0.14);
    border-radius: 8px;
    font-size: 13px;
    font-weight: 400;
    color: #111827;
    line-height: 40px;
    outline: none;
    transition: all 0.2s ease;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    box-sizing: border-box;
}
.ai-ctc-input::placeholder {
    color: #9ca3af;
}
.ai-ctc-input:focus,
.ai-ctc-select:focus {
    border-color: rgba(200, 16, 46, 0.55);
    box-shadow: 0 0 0 3px rgba(200, 16, 46, 0.08);
}
.ai-ctc-select-wrap {
    position: relative;
    width: 100%;
}
.ai-ctc-select-wrap::after {
    content: "";
    position: absolute;
    right: 14px;
    top: 50%;
    width: 9px;
    height: 9px;
    border-right: 1.6px solid #6b7280;
    border-bottom: 1.6px solid #6b7280;
    transform: translateY(-70%) rotate(45deg);
    pointer-events: none;
}

/* 红色提交按钮 — 自动贴表单底部 */
.ai-ctc-submit {
    margin-top: auto;
    width: 100%;
    height: 46px;
    border: none;
    border-radius: 23px;
    background: #C8102E;
    color: #fff;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.04em;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 6px 18px rgba(200, 16, 46, 0.18);
}
.ai-ctc-submit:hover {
    background: #b10e28;
    transform: translateY(-1px);
    box-shadow: 0 10px 24px rgba(200, 16, 46, 0.24);
}

/* ---- 右侧：联系我们 ---- */
.ai-ctc-aside-title {
    font-size: 14.5px;
    font-weight: 700;
    color: #111827;
    margin: 0 0 18px;
    line-height: 1.5;
    letter-spacing: 0.01em;
}

/* 两项联系 */
.ai-ctc-contact {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 14px 16px 15px;
    border-radius: 10px;
    background: #fafafa;
    border: 1px solid rgba(17, 24, 39, 0.06);
    margin-bottom: 12px;
}
.ai-ctc-contact:last-of-type {
    margin-bottom: 0;
}
.ai-ctc-contact-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: #fff5f6;
    border: 1px solid rgba(200, 16, 46, 0.18);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-top: 2px;
}
.ai-ctc-contact-body {
    display: flex;
    flex-direction: column;
    gap: 3px;
    min-width: 0;
}
.ai-ctc-contact-label {
    font-size: 12px;
    font-weight: 500;
    color: #6b7280;
    line-height: 1.6;
}
.ai-ctc-contact-value {
    font-size: 14.5px;
    font-weight: 700;
    color: #111827;
    line-height: 1.5;
    text-decoration: none;
}
a.ai-ctc-contact-value:hover { color: #C8102E; }

/* 分隔线 "你可以先了解" — margin-top:auto 让分隔线+以下两条 CTA 吸底（与左侧红按钮对齐） */
.ai-ctc-aside-divider {
    margin: auto 0 16px;  /* auto 占据上方空间，将后面内容推向卡片底部 */
    position: relative;
    height: 1px;
    background: rgba(17, 24, 39, 0.08);
}
.ai-ctc-aside-divider-text {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    background: #fff;
    padding: 0 14px;
    font-size: 12px;
    font-weight: 500;
    color: #6b7280;
    letter-spacing: 0.02em;
}

/* 两个 CTA 链接：白底 + 右侧红箭头 + 底部/右侧边框线 */
.ai-ctc-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px 13px;
    border-radius: 10px;
    background: #fff;
    border: 1px solid rgba(17, 24, 39, 0.08);
    text-decoration: none;
    margin-bottom: 12px;
    transition: all 0.2s ease;
}
.ai-ctc-cta:last-of-type {
    margin-bottom: 0;
}
.ai-ctc-cta:hover {
    border-color: rgba(200, 16, 46, 0.35);
    background: #fffafa;
    transform: translateX(2px);
}
.ai-ctc-cta-text {
    font-size: 13px;
    font-weight: 500;
    color: #111827;
    line-height: 1.6;
}
.ai-ctc-cta-arrow {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s ease;
}
.ai-ctc-cta:hover .ai-ctc-cta-arrow {
    transform: translateX(3px);
}

/* CTC 响应式 — 移动端仍保持单列表单自然高度 */
@media (max-width: 1024px) {
    .ai-ctc-grid {
        grid-template-columns: minmax(0, 1fr);
        gap: 22px;
    }
    .ai-ctc-form-box,
    .ai-ctc-aside {
        padding: 22px 24px 24px;
        min-height: auto;  /* 移动端单列表单/联系各自内容高度，不强制统一 */
    }
    .ai-ctc-form { flex: 0 0 auto; }
    .ai-ctc-submit { margin-top: 4px; }
    .ai-ctc-aside-divider { margin: 22px 0 16px; }
}
@media (max-width: 640px) {
    .ai-ctc { padding: 14px 0 48px; }
    .ai-ctc-title { font-size: 20px; margin-bottom: 10px; }
    .ai-ctc-sub { font-size: 12.5px; line-height: 1.95; }
    .ai-ctc-head { margin-bottom: 26px; }
    .ai-ctc-grid { gap: 16px; }

    .ai-ctc-form-box,
    .ai-ctc-aside {
        padding: 18px 20px 20px;
        border-radius: 12px;
    }
    .ai-ctc-row--2 {
        grid-template-columns: 1fr;
        gap: 14px;
    }
    .ai-ctc-form { gap: 12px; }
    .ai-ctc-submit {
        height: 44px;
        border-radius: 22px;
        font-size: 13.5px;
    }
    .ai-ctc-contact { padding: 12px 14px 13px; }
    .ai-ctc-contact-icon { width: 36px; height: 36px; }
    .ai-ctc-contact-icon svg { width: 20px; height: 20px; }
    .ai-ctc-contact-value { font-size: 14px; }
}

.ai-next {
    margin-top: 6px;
    color: rgba(255, 255, 255, 0.5);
    font-size: 12.5px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding-left: 38px;
}
.ai-next-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #C8102E;
    animation: aiPulse 1.6s ease-in-out infinite;
}
@keyframes aiPulse {
    0%, 100% { opacity: 0.4; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.35); }
}

.ai-input {
    display: flex;
    gap: 8px;
    padding: 12px 14px 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    background: #111215;
}
.ai-input input {
    flex: 1;
    background: #1a1b1f;
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 10px 14px;
    border-radius: 4px;
    color: #fff;
    font-size: 13.5px;
    outline: none;
    transition: border-color 0.2s ease;
}
.ai-input input::placeholder {
    color: rgba(255, 255, 255, 0.45);
}
.ai-input input:focus {
    border-color: #C8102E;
}
.ai-input button {
    background: #C8102E;
    border: none;
    color: #fff;
    width: 38px;
    height: 38px;
    border-radius: 4px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s ease;
}
.ai-input button:hover {
    background: #a40d26;
}

/* ============ 公共标题 ============ */
.ai-section-head {
    text-align: center;
    margin-bottom: 44px;
}
.ai-section-head h2 {
    font-size: 28px;
    font-weight: 700;
    margin: 0 0 10px;
    color: #1A1A1A;
    letter-spacing: -0.01em;
}
.ai-section-head h2 span {
    color: #C8102E;
    margin: 0 4px;
}
.ai-section-head p {
    font-size: 14.5px;
    color: #555;
    margin: 0;
}
.ai-section-head.ai-section-head-dark h2 {
    color: #fff;
}
.ai-section-head.ai-section-head-dark p {
    color: rgba(255, 255, 255, 0.7);
}

/* ============ 六大 AI 智能功能 ============ */
.ai-features {
    padding: 80px 0 90px;
    background: #fff;
}
.ai-features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.ai-feature {
    background: #fff;
    border: 1px solid rgba(0, 0, 0, 0.08);
    padding: 28px 26px;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.ai-feature:hover {
    transform: translateY(-4px);
    border-color: rgba(200, 16, 46, 0.4);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.06);
}
.ai-feature-icon {
    width: 40px;
    height: 40px;
    background: #C8102E;
    border-radius: 2px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
}
.ai-feature h3 {
    font-size: 16.5px;
    font-weight: 700;
    color: #1A1A1A;
    margin: 0 0 10px;
}
.ai-feature p {
    font-size: 13.5px;
    line-height: 1.75;
    color: #555;
    margin: 0;
}

/* ============ AI 工具矩阵 ============ */
.ai-matrix {
    padding: 80px 0 90px;
    background: #1A1A1A;
}
.ai-matrix-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
}
.ai-matrix-card {
    background: #25262a;
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 26px 24px 28px;
    transition: border-color 0.25s ease, transform 0.25s ease;
}
.ai-matrix-card:hover {
    border-color: rgba(200, 16, 46, 0.5);
    transform: translateY(-3px);
}
.ai-matrix-title-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 8px;
}
.ai-matrix-title-row h3 {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    margin: 0;
}
.ai-status {
    font-size: 11.5px;
    padding: 3px 10px;
    border-radius: 999px;
    font-weight: 600;
    letter-spacing: 0.05em;
    white-space: nowrap;
}
.ai-status-green {
    background: rgba(74, 222, 128, 0.15);
    color: #86efac;
    border: 1px solid rgba(74, 222, 128, 0.35);
}
.ai-status-yellow {
    background: rgba(250, 204, 21, 0.12);
    color: #fde68a;
    border: 1px solid rgba(250, 204, 21, 0.3);
}
.ai-status-gray {
    background: rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.75);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.ai-matrix-card p {
    font-size: 13px;
    line-height: 1.75;
    color: rgba(255, 255, 255, 0.72);
    margin: 0 0 18px;
}
.ai-matrix-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13.5px;
    font-weight: 600;
    text-decoration: none;
    transition: color 0.2s ease, gap 0.2s ease;
}
.ai-matrix-link span {
    display: inline-block;
    transition: transform 0.2s ease;
}
.ai-matrix-link:hover span {
    transform: translateX(3px);
}
.ai-link-red {
    color: #ff6b7f;
}
.ai-link-red:hover {
    color: #ff8b9b;
}
.ai-link-yellow {
    color: #fde68a;
}
.ai-link-yellow:hover {
    color: #fef3c7;
}
.ai-matrix-muted {
    font-size: 13.5px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.55);
    cursor: not-allowed;
}

/* ============ 响应式 ============ */
@media (max-width: 1100px) {
    .ai-hero-inner { grid-template-columns: 1fr; gap: 50px; }
    .ai-features-grid { grid-template-columns: repeat(2, 1fr); }
    .ai-matrix-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
    .ai-hero { padding: 48px 0 60px; }
    .ai-hero-left p { font-size: 14px; }
    .ai-features { padding: 60px 0 70px; }
    .ai-features-grid { grid-template-columns: 1fr; }
    .ai-matrix { padding: 60px 0 70px; }
    .ai-matrix-grid { grid-template-columns: 1fr; }
    .ai-card { max-width: none; }
    .ai-chat { min-height: 220px; }
}