:root {
    --brand: #1a56ff;
    --brand-deep: #0e2f8f;
    --brand-soft: #eaf0ff;
    --cyan: #00a8b5;
    --ink: #111a2b;
    --ink-2: #3d4a63;
    --ink-3: #6b7891;
    --line: #e6eaf2;
    --bg: #ffffff;
    --bg-soft: #f6f8fc;
    --warn: #f59e0b;
    --danger: #ef4444;
    --green: #16a34a;
    --radius: 18px;
    --shadow-sm: 0 2px 10px rgba(17,26,43,.05);
    --shadow: 0 10px 30px rgba(17,26,43,.07);
    --shadow-lg: 0 22px 60px rgba(17,26,43,.12);
    --max: 1200px;
}

.wrap {
    max-width: var(--max);
    margin: 0 auto;
    padding: 0 28px
}

/* Hero */
.hero {
    position: relative;
    overflow: hidden;
    background: radial-gradient(1100px 480px at 80% -10%, rgba(26,86,255,.16), transparent 60%), radial-gradient(800px 400px at 8% 8%, rgba(0,168,181,.12), transparent 62%), linear-gradient(180deg,#fbfcff,#ffffff);
    padding: 100px 0 80px;
}

    .hero::before {
        content: "";
        position: absolute;
        inset: 0;
        background-image: linear-gradient(rgba(17,26,43,.035) 1px,transparent 1px), linear-gradient(90deg,rgba(17,26,43,.035) 1px,transparent 1px);
        background-size: 56px 56px;
        mask-image: radial-gradient(820px 500px at 50% 0%,#000,transparent 78%);
        -webkit-mask-image: radial-gradient(820px 500px at 50% 0%,#000,transparent 78%);
    }

.hero-inner {
    position: relative
}

.hero h1 {
    font-size: clamp(30px,4.2vw,48px);
    line-height: 1.25;
    font-weight: 800;
    letter-spacing: -.5px;
    margin: 0 0 18px
}

    .hero h1 em {
        font-style: normal;
        background: linear-gradient(100deg,var(--brand),var(--cyan));
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent
    }

.hero-lead {
    font-size: 17px;
    color: var(--ink-2);
    /*max-width: 780px;*/
    line-height: 1.85;
    margin-bottom: 38px
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4,1fr);
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.hero-stat {
    padding: 24px 18px;
    border-right: 1px solid var(--line);
    text-align: center
}

    .hero-stat:last-child {
        border-right: none
    }

    .hero-stat b {
        display: block;
        font-size: 30px;
        font-weight: 800;
        letter-spacing: -.5px;
        color: var(--ink);
        line-height: 1.2
    }

        .hero-stat b span {
            font-size: 16px;
            color: var(--brand);
            margin-left: 2px
        }

    .hero-stat span.lbl {
        font-size: 13px;
        color: var(--ink-3);
        letter-spacing: .5px;
        display: block;
        margin-top: 4px
    }

/* 通用区块 */
section {
    padding: 96px 0
}

.sec-head {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 60px
}

.tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2.5px;
    color: var(--brand);
    background: var(--brand-soft);
    padding: 5px 13px;
    border-radius: 6px;
}

.sec-head h2 {
    font-size: clamp(26px,3.4vw,38px);
    font-weight: 800;
    margin: 16px 0 14px;
    letter-spacing: -.4px
}

.sec-head p {
    color: var(--ink-3);
    font-size: 16px
}

.sec-head .lead-sub {
    color: var(--ink-2)
}

/* 二级标题（左右交替功能模块用） */
.module {
    margin-bottom: 120px
}

    .module:last-child {
        margin-bottom: 0
    }

    .module h2 {
        font-size: 30px;
        font-weight: 800;
        letter-spacing: -.3px;
        margin-bottom: 14px
    }

    .module .lead {
        font-size: 15.5px;
        color: var(--ink-2);
        margin-bottom: 24px
    }

    .module .num {
        display: inline-block;
        background: var(--brand-soft);
        color: var(--brand);
        width: 38px;
        height: 38px;
        border-radius: 10px;
        font-weight: 800;
        line-height: 38px;
        text-align: center;
        font-size: 16px;
        margin-bottom: 16px;
    }

    .module .col-text h3 {
        font-size: 20px;
        font-weight: 700;
        margin: 16px 0 10px
    }

    .module .col-text p {
        color: var(--ink-2);
        font-size: 15px;
        line-height: 1.85;
        margin-bottom: 14px
    }

.feature-list {
    list-style: none;
    margin: 18px 0 0;
    padding: 0;
    text-align: left;
}

    .feature-list li {
        position: relative;
        padding: 8px 0 8px 30px;
        font-size: 14.5px;
        color: var(--ink-2);
        line-height: 1.7;
    }

        .feature-list li::before {
            content: "";
            position: absolute;
            left: 0;
            top: 14px;
            width: 18px;
            height: 18px;
            border-radius: 50%;
            background: var(--brand-soft);
        }

        .feature-list li::after {
            content: "";
            position: absolute;
            left: 5px;
            top: 19px;
            width: 8px;
            height: 4px;
            border-left: 2px solid var(--brand);
            border-bottom: 2px solid var(--brand);
            transform: rotate(-45deg);
        }

/* 痛点卡片 */
.pain-grid {
    display: grid;
    grid-template-columns: repeat(3,1fr);
    gap: 22px
}

.pain {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 30px 26px;
    position: relative;
    overflow: hidden;
    transition: .3s;
}

    .pain:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow);
        border-color: transparent
    }

    .pain .idx {
        position: absolute;
        top: -2px;
        right: 18px;
        font-size: 84px;
        font-weight: 800;
        color: rgba(26,86,255,.06);
        line-height: 1;
        letter-spacing: -3px;
    }

    .pain .dot {
        width: 36px;
        height: 36px;
        border-radius: 50%;
        background: var(--brand-soft);
        display: grid;
        place-items: center;
        color: var(--brand);
        font-weight: 800;
        font-size: 15px;
        margin-bottom: 14px;
    }

    .pain h3 {
        font-size: 17px;
        font-weight: 700;
        margin-bottom: 8px
    }

    .pain p {
        font-size: 14px;
        color: var(--ink-3);
        line-height: 1.8
    }

/* 三段时间轴 */
.phase-timeline {
    position: relative;
    display: grid;
    grid-template-columns: repeat(3,1fr);
    gap: 0
}

    .phase-timeline::before {
        content: "";
        position: absolute;
        top: 46px;
        left: 14%;
        right: 14%;
        height: 2px;
        background: repeating-linear-gradient(90deg,var(--line) 0 8px,transparent 8px 16px);
    }

.phase {
    text-align: center;
    padding: 0 14px;
    position: relative
}

    .phase .badge {
        width: 92px;
        height: 92px;
        border-radius: 50%;
        background: #fff;
        border: 2px solid var(--line);
        display: grid;
        place-items: center;
        margin: 0 auto 22px;
        color: var(--brand);
        font-weight: 800;
        font-size: 20px;
        position: relative;
        z-index: 2;
        transition: .3s;
    }

    .phase:hover .badge {
        border-color: var(--brand);
        background: var(--brand);
        color: #fff;
        transform: translateY(-3px);
        box-shadow: 0 12px 28px rgba(26,86,255,.3)
    }

    .phase h4 {
        font-size: 18px;
        font-weight: 700;
        margin-bottom: 10px
    }

    .phase p {
        font-size: 14.5px;
        color: var(--ink-3);
        line-height: 1.85
    }

/* 实施基础四象限 */
.foundation-grid {
    display: grid;
    grid-template-columns: repeat(2,1fr);
    gap: 24px
}

.foundation {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 30px 28px;
    display: flex;
    gap: 18px;
    align-items: flex-start;
    transition: .3s;
}

    .foundation:hover {
        transform: translateY(-3px);
        box-shadow: var(--shadow);
        border-color: transparent
    }

    .foundation .ico {
        flex-shrink: 0;
        width: 50px;
        height: 50px;
        border-radius: 14px;
        background: var(--brand-soft);
        color: var(--brand);
        display: grid;
        place-items: center;
        transition: .3s;
    }

    .foundation:hover .ico {
        background: linear-gradient(135deg,var(--brand),var(--cyan));
        color: #fff
    }

    .foundation .ico svg {
        width: 24px;
        height: 24px;
        stroke: currentColor;
        fill: none;
        stroke-width: 1.8;
        stroke-linecap: round;
        stroke-linejoin: round
    }

    .foundation h4 {
        font-size: 16px;
        font-weight: 700;
        margin-bottom: 6px
    }

    .foundation p {
        font-size: 14px;
        color: var(--ink-3);
        line-height: 1.8
    }

    .foundation .label {
        font-size: 11px;
        font-weight: 700;
        letter-spacing: 2px;
        color: var(--cyan);
        margin-bottom: 6px
    }

/* 架构图 */
.arch-stack {
    display: grid;
    gap: 14px
}

.arch-row {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 22px 28px;
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 30px;
    align-items: center;
    transition: .3s;
    position: relative;
    overflow: hidden;
}

    .arch-row::before {
        content: "";
        position: absolute;
        left: 0;
        top: 0;
        bottom: 0;
        width: 4px;
        background: linear-gradient(180deg,var(--brand),var(--cyan));
    }

    .arch-row:hover {
        transform: translateX(4px);
        box-shadow: var(--shadow);
        border-color: transparent
    }

    .arch-row .name {
        font-size: 17px;
        font-weight: 700
    }

        .arch-row .name small {
            display: block;
            font-size: 11px;
            font-weight: 600;
            color: var(--brand);
            letter-spacing: 2px;
            margin-bottom: 4px
        }

    .arch-row .tech {
        font-size: 14px;
        color: var(--ink-2);
        line-height: 1.7
    }

        .arch-row .tech b {
            color: var(--ink)
        }

.tech-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 38px;
    justify-content: center
}

.chip {
    background: #fff;
    border: 1px solid var(--line);
    color: var(--ink-2);
    padding: 8px 16px;
    border-radius: 99px;
    font-size: 13.5px;
    font-weight: 500;
    transition: .22s;
}

    .chip.brand {
        background: var(--ink);
        color: #fff;
        border-color: var(--ink);
        font-weight: 600
    }

    .chip:hover {
        transform: translateY(-2px);
        box-shadow: var(--shadow-sm);
        border-color: var(--brand);
        color: var(--brand)
    }

    .chip.brand:hover {
        background: var(--brand);
        color: #fff;
        border-color: var(--brand)
    }

/* 知识库四库 */
.four-kb {
    display: grid;
    grid-template-columns: repeat(4,1fr);
    gap: 20px
}

.kb {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 26px 24px;
    position: relative;
    overflow: hidden;
    transition: .3s;
}

    .kb:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow);
        border-color: transparent
    }

    .kb .label {
        font-size: 11px;
        font-weight: 700;
        letter-spacing: 2.5px;
        color: var(--brand);
        margin-bottom: 10px
    }

    .kb h4 {
        font-size: 18px;
        font-weight: 700;
        margin-bottom: 10px
    }

    .kb p {
        font-size: 14px;
        color: var(--ink-3);
        line-height: 1.8
    }

    .kb .ribbon {
        position: absolute;
        top: 0;
        right: 0;
        background: var(--brand-soft);
        color: var(--brand);
        font-size: 11px;
        font-weight: 700;
        padding: 5px 12px;
        border-bottom-left-radius: 10px;
    }

/* RAG 流程 */
.rag {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 36px 30px;
    box-shadow: var(--shadow);
}

.rag-flow {
    display: grid;
    grid-template-columns: 1fr;
    gap: 18px
}

.rag-step {
    display: grid;
    grid-template-columns: 42px 1fr;
    gap: 18px;
    align-items: center;
    padding: 14px 18px;
    background: var(--bg-soft);
    border-radius: 12px;
    border: 1px solid var(--line);
    position: relative;
}

    .rag-step .n {
        width: 42px;
        height: 42px;
        border-radius: 10px;
        background: linear-gradient(135deg,var(--brand),var(--cyan));
        color: #fff;
        display: grid;
        place-items: center;
        font-weight: 800;
        box-shadow: 0 6px 14px rgba(26,86,255,.28);
    }

    .rag-step h4 {
        font-size: 15.5px;
        font-weight: 700;
        margin-bottom: 4px
    }

    .rag-step p {
        font-size: 13.5px;
        color: var(--ink-3)
    }

    .rag-step:not(:last-child)::after {
        content: "";
        position: absolute;
        left: 39px;
        bottom: -18px;
        width: 2px;
        height: 18px;
        background: repeating-linear-gradient(180deg,var(--brand) 0 4px,transparent 4px 8px);
    }

.rag-metrics {
    display: grid;
    grid-template-columns: repeat(4,1fr);
    gap: 14px;
    margin-top: 24px;
    border-top: 1px solid var(--line);
    padding-top: 24px;
}

.rm {
    text-align: center
}

    .rm b {
        display: block;
        font-size: 24px;
        font-weight: 800;
        color: var(--brand)
    }

        .rm b span {
            font-size: 14px;
            margin-left: 2px
        }

    .rm span {
        font-size: 12.5px;
        color: var(--ink-3);
        display: block;
        margin-top: 4px
    }

/* 4 大智能体 */
.agent-grid {
    display: grid;
    grid-template-columns: repeat(2,1fr);
    gap: 24px
}

.agent {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 32px 30px;
    position: relative;
    overflow: hidden;
    transition: .3s;
}

    .agent::before {
        content: "";
        position: absolute;
        left: 0;
        top: 0;
        bottom: 0;
        width: 4px;
        background: linear-gradient(180deg,var(--brand),var(--cyan));
    }

    .agent:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-lg);
        border-color: transparent
    }

    .agent .label {
        font-size: 11px;
        font-weight: 700;
        letter-spacing: 2.5px;
        color: var(--brand);
        margin-bottom: 8px
    }

    .agent h4 {
        font-size: 20px;
        font-weight: 700;
        margin-bottom: 10px
    }

    .agent .des {
        font-size: 14.5px;
        color: var(--ink-2);
        line-height: 1.85;
        margin-bottom: 14px
    }

    .agent .flow {
        list-style: none;
        padding: 14px 0 0;
        border-top: 1px dashed var(--line);
    }

        .agent .flow li {
            font-size: 13.5px;
            color: var(--ink-2);
            padding: 6px 0;
            display: flex;
            gap: 8px;
        }

            .agent .flow li::before {
                content: "›";
                color: var(--brand);
                font-weight: 800;
                flex-shrink: 0;
            }

/* 6 大核心功能 - 左右交替 */
.feature {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 120px
}

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

        .feature.reverse .col-text {
            direction: ltr
        }

        .feature.reverse .col-img {
            direction: ltr
        }

.col-img {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone {
    width: 280px;
    border-radius: 36px;
    border: 10px solid #1a2030;
    background: #0a1226;
    box-shadow: 0 30px 80px rgba(17,26,43,.25), inset 0 0 0 2px #2a3144;
    overflow: hidden;
    position: relative;
    padding: 0;
    transform: rotate(-2deg);
    transition: .4s;
}

.feature:hover .phone {
    transform: rotate(0deg) translateY(-6px)
}

.feature .lead {
    font-size: 18px;
    color: #3d4a63;
    font-weight: 500;
    line-height: 1.5;
}

.phone img {
    width: 100%;
    display: block;
    border-radius: 26px
}

.phone-wide {
    width: 100%;
    max-width: 520px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    transform: perspective(1200px) rotateY(-3deg) rotateX(2deg);
    transition: .4s;
}

.feature:hover .phone-wide {
    transform: perspective(1200px) rotateY(0) rotateX(0) translateY(-6px)
}

.phone-wide img {
    width: 100%;
    display: block
}

.doc-mock {
    width: 100%;
    max-width: 520px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    padding: 0;
    transform: perspective(1200px) rotateY(2deg);
    transition: .4s;
}

.feature:hover .doc-mock {
    transform: perspective(1200px) rotateY(0) translateY(-6px)
}

.doc-mock img {
    width: 100%;
    display: block
}

/* 双手机并列 */
.phones-2 {
    display: flex;
    gap: 30px;
    justify-content: center;
    align-items: center
}

    .phones-2 .phone {
        width: 230px;
        transform: rotate(-3deg)
    }

        .phones-2 .phone:nth-child(2) {
            transform: rotate(3deg) translateY(20px)
        }

    .phones-2:hover .phone {
        transform: rotate(0) translateY(0)
    }

        .phones-2:hover .phone:nth-child(2) {
            transform: rotate(0) translateY(-6px)
        }

/* 标签条 */
.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 14px
}

    .tag-list span {
        background: var(--brand-soft);
        color: var(--brand);
        padding: 5px 12px;
        border-radius: 6px;
        font-size: 12.5px;
        font-weight: 500;
    }

/* 成效 */
.outcome-grid {
    display: grid;
    grid-template-columns: repeat(2,1fr);
    gap: 24px
}

.outcome {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 30px 28px;
    display: flex;
    gap: 18px;
    align-items: flex-start;
    transition: .3s;
}

    .outcome:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow);
        border-color: transparent
    }

    .outcome .ico {
        flex-shrink: 0;
        width: 52px;
        height: 52px;
        border-radius: 14px;
        background: linear-gradient(135deg,var(--brand),var(--cyan));
        color: #fff;
        display: grid;
        place-items: center;
    }

        .outcome .ico svg {
            width: 24px;
            height: 24px;
            stroke: currentColor;
            fill: none;
            stroke-width: 1.8;
            stroke-linecap: round;
            stroke-linejoin: round
        }

    .outcome h4 {
        font-size: 17px;
        font-weight: 700;
        margin-bottom: 6px
    }

    .outcome p {
        font-size: 14px;
        color: var(--ink-3);
        line-height: 1.8
    }

/* 政策依据块 */
.policy {
    background: linear-gradient(135deg,rgba(26,86,255,.05),rgba(0,168,181,.05));
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 28px 32px;
    margin: 40px auto 0;
    /*max-width: 980px;*/
}

    .policy h4 {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 16px;
        font-weight: 700;
        margin-bottom: 12px;
        color: var(--brand-deep);
    }

        .policy h4::before {
            content: "";
            width: 6px;
            height: 18px;
            background: linear-gradient(180deg,var(--brand),var(--cyan));
            border-radius: 2px;
        }

    .policy p {
        font-size: 14.5px;
        color: var(--ink-2);
        line-height: 1.9
    }

/* 动画 */
.reveal {
    opacity: 0;
    transform: translateY(26px);
    transition: opacity .7s ease,transform .7s cubic-bezier(.22,.8,.3,1)
}

    .reveal.in {
        opacity: 1;
        transform: none
    }

/* 响应式 */
@media(max-width:1100px) {
    .four-kb {
        grid-template-columns: repeat(2,1fr)
    }
}

@media(max-width:1000px) {
    .hero-stats {
        grid-template-columns: repeat(2,1fr)
    }

    .hero-stat {
        border-bottom: 1px solid var(--line)
    }

        .hero-stat:nth-child(2) {
            border-right: none
        }

        .hero-stat:nth-child(3), .hero-stat:nth-child(4) {
            border-bottom: none
        }

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

    .phase-timeline {
        grid-template-columns: 1fr;
        gap: 30px
    }

        .phase-timeline::before {
            display: none
        }

    .agent-grid, .foundation-grid {
        grid-template-columns: 1fr
    }

    .feature, .feature.reverse {
        grid-template-columns: 1fr;
        direction: ltr;
        gap: 40px
    }

        .feature.reverse .col-img {
            order: -1
        }

    .outcome-grid {
        grid-template-columns: 1fr
    }

    .arch-row {
        grid-template-columns: 1fr;
        gap: 10px
    }
}

@media(max-width:720px) {
    .hero {
        padding: 68px 0 60px
    }

    .pain-grid {
        grid-template-columns: 1fr
    }

    .four-kb {
        grid-template-columns: 1fr
    }

    section {
        padding: 68px 0
    }

    .rag-metrics {
        grid-template-columns: repeat(2,1fr)
    }

    .phone {
        width: 230px
    }

    .phones-2 {
        flex-direction: column
    }

        .phones-2 .phone, .phones-2 .phone:nth-child(2) {
            width: 230px;
            transform: none
        }
}