.nav-links a.active {
    color: #5ee7ff;
}

.thinking-hero {
    position: relative;
    overflow: hidden;
    padding: 92px 20px 84px;
    background:
        radial-gradient(circle at 18% 16%, rgba(94, 231, 255, 0.16), transparent 34%),
        radial-gradient(circle at 82% 22%, rgba(143, 92, 255, 0.18), transparent 36%);
}

.thinking-hero-inner {
    max-width: 1180px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 60px;
    align-items: center;
}

.thinking-hero-left h1 {
    margin: 0;
    font-size: clamp(42px, 5.8vw, 70px);
    line-height: 1.08;
    letter-spacing: -2px;
}

.thinking-hero-left p {
    margin: 24px 0 0;
    max-width: 650px;
    color: #c4ccef;
    font-size: 18px;
}

.thinking-hero-right {
    display: flex;
    justify-content: center;
}

.mind-card {
    width: min(100%, 460px);
    padding: 26px;
    border-radius: 34px;
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.15), rgba(255, 255, 255, 0.05)),
        radial-gradient(circle at top, rgba(94, 231, 255, 0.15), transparent 55%);
    border: 1px solid rgba(255, 255, 255, 0.16);
    box-shadow: 0 30px 90px rgba(0, 0, 0, 0.35);
}

.mind-card-title {
    color: #dce4ff;
    font-size: 18px;
    font-weight: 800;
}

.mind-ring {
    position: relative;
    width: 320px;
    height: 320px;
    margin: 34px auto;
    border-radius: 50%;
    border: 1px dashed rgba(94, 231, 255, 0.35);
    background:
        radial-gradient(circle, rgba(94, 231, 255, 0.10), transparent 56%);
}

.mind-core {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 126px;
    height: 126px;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #071022;
    font-size: 32px;
    font-weight: 900;
    background: linear-gradient(135deg, #5ee7ff, #9effc3);
    box-shadow: 0 0 60px rgba(94, 231, 255, 0.35);
}

.mind-node {
    position: absolute;
    width: 78px;
    height: 78px;
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-weight: 900;
    background: rgba(255, 255, 255, 0.10);
    border: 1px solid rgba(255, 255, 255, 0.16);
    backdrop-filter: blur(16px);
}

.node-one {
    top: -18px;
    left: 50%;
    transform: translateX(-50%);
}

.node-two {
    right: -18px;
    top: 50%;
    transform: translateY(-50%);
}

.node-three {
    bottom: -18px;
    left: 50%;
    transform: translateX(-50%);
}

.node-four {
    left: -18px;
    top: 50%;
    transform: translateY(-50%);
}

.mind-card-footer {
    padding: 16px;
    border-radius: 18px;
    color: #c4ccef;
    background: rgba(5, 8, 22, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.mind-warning-section,
.action-section {
    background: rgba(255, 255, 255, 0.025);
}

.mistake-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
}

.mistake-card {
    padding: 24px;
    border-radius: 26px;
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.mistake-card span {
    display: inline-flex;
    padding: 5px 11px;
    border-radius: 999px;
    color: #ffcc70;
    background: rgba(255, 204, 112, 0.12);
    font-size: 13px;
    font-weight: 800;
}

.mistake-card h3 {
    margin: 16px 0 10px;
    font-size: 21px;
}

.mistake-card p {
    margin: 0;
    color: #b8c1e2;
}

.train-roadmap {
    display: grid;
    gap: 24px;
}

.train-card {
    position: relative;
    display: grid;
    grid-template-columns: 90px 1fr;
    gap: 22px;
    padding: 28px;
    border-radius: 30px;
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.10), rgba(255, 255, 255, 0.05));
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.18);
}

.train-number {
    width: 74px;
    height: 74px;
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #06101f;
    font-size: 26px;
    font-weight: 900;
    background: linear-gradient(135deg, #5ee7ff, #9effc3);
}

.train-content h3 {
    margin: 0;
    font-size: 28px;
    line-height: 1.25;
}

.train-content > p {
    margin: 14px 0 0;
    color: #c4ccef;
    font-size: 17px;
}

.question-box,
.example-box {
    margin-top: 18px;
    padding: 18px;
    border-radius: 20px;
}

.question-box {
    background: rgba(94, 231, 255, 0.08);
    border: 1px solid rgba(94, 231, 255, 0.16);
}

.example-box {
    background: rgba(158, 255, 195, 0.08);
    border: 1px solid rgba(158, 255, 195, 0.16);
}

.question-box strong,
.example-box strong {
    color: #ffffff;
}

.question-box ul {
    margin: 10px 0 0;
    padding-left: 20px;
    color: #d9def6;
}

.example-box p {
    margin: 8px 0 0;
    color: #cfe9e3;
}

.product-type-grid,
.flow-list,
.compare-box,
.asset-grid,
.opc-steps {
    margin-top: 20px;
}

.product-type-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
}

.product-type-grid div {
    padding: 16px;
    border-radius: 18px;
    background: rgba(5, 8, 22, 0.38);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.product-type-grid span {
    color: #5ee7ff;
    font-weight: 900;
}

.product-type-grid p {
    margin: 8px 0 0;
    color: #b8c1e2;
    font-size: 14px;
}

.flow-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.flow-list div {
    padding: 16px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.06);
}

.flow-list strong {
    color: #ffffff;
}

.flow-list p {
    margin: 6px 0 0;
    color: #b8c1e2;
}

.compare-box {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.compare-box div {
    padding: 18px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.compare-box span {
    color: #ffcc70;
    font-weight: 900;
}

.compare-box p {
    margin: 8px 0 0;
    color: #b8c1e2;
}

.asset-grid {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 12px;
}

.asset-grid div {
    padding: 16px 10px;
    text-align: center;
    border-radius: 18px;
    color: #dffcff;
    background: rgba(94, 231, 255, 0.08);
    border: 1px solid rgba(94, 231, 255, 0.14);
}

.opc-steps {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.opc-steps div {
    display: flex;
    gap: 12px;
    align-items: center;
    padding: 16px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.06);
}

.opc-steps span {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: inline-flex;
    flex: 0 0 auto;
    align-items: center;
    justify-content: center;
    color: #06101f;
    font-weight: 900;
    background: #5ee7ff;
}

.opc-steps p {
    margin: 0;
    color: #d9def6;
}

.checklist-panel {
    max-width: 860px;
    margin: 0 auto;
    padding: 26px;
    border-radius: 30px;
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.checklist-panel label {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    padding: 15px 0;
    color: #d9def6;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    cursor: pointer;
}

.checklist-panel label:last-child {
    border-bottom: none;
}

.checklist-panel input {
    width: 20px;
    height: 20px;
    margin-top: 3px;
    accent-color: #5ee7ff;
}

.checklist-panel span {
    font-size: 16px;
}

.score-tip {
    max-width: 860px;
    margin: 18px auto 0;
    padding: 16px 20px;
    border-radius: 20px;
    color: #cffff0;
    background: rgba(158, 255, 195, 0.1);
    border: 1px solid rgba(158, 255, 195, 0.18);
}

.next-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 26px;
    padding: 34px;
    border-radius: 34px;
    background:
        linear-gradient(135deg, rgba(94, 231, 255, 0.14), rgba(143, 92, 255, 0.14)),
        rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.next-box h2 {
    margin: 0;
    font-size: clamp(28px, 4vw, 42px);
    line-height: 1.2;
}

.next-box p {
    margin: 14px 0 0;
    color: #b8c1e2;
    font-size: 17px;
}

@media (max-width: 980px) {
    .thinking-hero-inner {
        grid-template-columns: 1fr;
    }

    .mistake-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .product-type-grid,
    .asset-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .opc-steps {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .thinking-hero {
        padding: 58px 16px 62px;
    }

    .thinking-hero-left h1 {
        font-size: 40px;
    }

    .thinking-hero-left p {
        font-size: 16px;
    }

    .mind-ring {
        width: 260px;
        height: 260px;
    }

    .mind-core {
        width: 104px;
        height: 104px;
        font-size: 26px;
    }

    .mind-node {
        width: 64px;
        height: 64px;
        border-radius: 20px;
    }

    .mistake-grid,
    .flow-list,
    .compare-box,
    .product-type-grid,
    .asset-grid,
    .opc-steps {
        grid-template-columns: 1fr;
    }

    .train-card {
        grid-template-columns: 1fr;
        padding: 22px;
    }

    .train-number {
        width: 62px;
        height: 62px;
        border-radius: 20px;
        font-size: 22px;
    }

    .train-content h3 {
        font-size: 23px;
    }

    .next-box {
        flex-direction: column;
        align-items: flex-start;
    }
}