:root {
    --bg: #f2f4f7;
    --surface: #ffffff;
    --surface-muted: #f7f9fc;
    --text: #1f2a37;
    --text-muted: #5e6b7a;
    --line: #d9e1ea;
    --brand: #005b96;
    --brand-dark: #00446f;
    --accent: #f3a201;
    --radius: 14px;
    --shadow: 0 10px 28px rgba(17, 37, 63, 0.11);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

a {
    color: inherit;
    text-decoration: none;
}

.container1 {
    width: min(1200px, calc(100% - 48px));
    margin: 0 auto;
}

.topbar {
    background: #fff;
    border-bottom: 1px solid var(--line);
    position: sticky;
    top: 0;
    z-index: 50;
}

.topbar__inner {
    min-height: 74px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.brand {
    font-weight: 700;
    letter-spacing: 0.06em;
    color: var(--brand);
}

.menu {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.menu a {
    color: #314357;
    font-weight: 500;
    padding: 4px 0;
    border-bottom: 2px solid transparent;
    transition: 0.2s ease;
}

.menu a:hover,
.menu a.is-active {
    color: var(--brand);
    border-bottom-color: var(--brand);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    padding: 10px 18px;
    font-weight: 600;
}

.btn--outline {
    border: 1px solid var(--brand);
    color: var(--brand);
}

.btn--outline:hover {
    background: var(--brand);
    color: #fff;
}

.hero {
    position: relative;
    min-height: 280px;
    background:
        linear-gradient(120deg, rgba(4, 18, 34, 0.84), rgba(0, 91, 150, 0.72)),
        repeating-linear-gradient(
            -55deg,
            rgba(255, 255, 255, 0.08) 0,
            rgba(255, 255, 255, 0.08) 8px,
            transparent 8px,
            transparent 18px
        );
    overflow: hidden;
}

.hero__overlay {
    position: absolute;
    inset: auto -120px -140px auto;
    width: 430px;
    height: 430px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(243, 162, 1, 0.36), transparent 62%);
    pointer-events: none;
}

.hero__content {
    position: relative;
    z-index: 1;
    color: #fff;
    padding: 46px 0 56px;
}

.hero__eyebrow {
    margin: 0;
    font-size: 14px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    opacity: 0.9;
}

.hero h1 {
    margin: 8px 0 10px;
    font-size: clamp(30px, 5vw, 46px);
    line-height: 1.15;
}

.hero__desc {
    margin: 0;
    max-width: 760px;
    color: rgba(255, 255, 255, 0.92);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #66788d;
    font-size: 14px;
    padding: 24px 0 14px;
}

.breadcrumb a:hover {
    color: var(--brand);
}

.filter {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    padding: 8px 0 24px;
}

.chip {
    padding: 8px 14px;
    border-radius: 999px;
    font-size: 14px;
    border: 1px solid var(--line);
    background: #fff;
    color: #445468;
    transition: 0.2s ease;
}

.chip:hover,
.chip.is-active {
    border-color: var(--brand);
    color: var(--brand);
    background: #e9f4ff;
}

.cards {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
}

.card {
    background: var(--surface);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid #dce4ee;
    box-shadow: 0 3px 10px rgba(21, 42, 67, 0.04);
    display: flex;
    flex-direction: column;
    transition: transform 0.22s ease, box-shadow 0.22s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.card__media {
    aspect-ratio: 16 / 10;
    background-size: cover;
    background-position: center;
}

.media-1 {
    background-image: linear-gradient(145deg, #1366a7, #022a4f);
}

.media-2 {
    background-image: linear-gradient(145deg, #326a5e, #132a25);
}

.media-3 {
    background-image: linear-gradient(145deg, #9e6426, #5d3003);
}

.media-4 {
    background-image: linear-gradient(145deg, #6f7480, #2a2f38);
}

.media-5 {
    background-image: linear-gradient(145deg, #5a628f, #262d4d);
}

.media-6 {
    background-image: linear-gradient(145deg, #0f7a80, #07444d);
}

.card__body {
    padding: 20px 20px 22px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    height: 100%;
}

.card__meta {
    margin: 0;
    font-size: 13px;
    color: #748295;
}

.card h2 {
    margin: 0;
    font-size: 21px;
    line-height: 1.33;
}

.card p {
    margin: 0;
    color: var(--text-muted);
    font-size: 15px;
}

.card__link {
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    width: fit-content;
    color: var(--brand);
    font-weight: 600;
    border-bottom: 1px solid transparent;
}

.card__link:hover {
    border-bottom-color: var(--brand);
}

.pagination {
    margin: 34px 0 64px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}

.page {
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border-radius: 8px;
    border: 1px solid var(--line);
    background: #fff;
    color: #3e4f64;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    transition: 0.2s ease;
}

.page:hover,
.page.is-current {
    border-color: var(--brand);
    color: #fff;
    background: var(--brand);
}

.page--next {
    padding: 0 16px;
}

@media (max-width: 1060px) {
    .cards {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 760px) {
    .container1 {
        width: min(1200px, calc(100% - 30px));
    }

    .topbar__inner {
        min-height: 64px;
        flex-wrap: wrap;
        padding: 10px 0;
    }

    .menu {
        width: 100%;
        order: 3;
        gap: 16px;
        padding-bottom: 6px;
    }

    .hero {
        min-height: 240px;
    }

    .cards {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .card h2 {
        font-size: 19px;
    }
}

/* Case Study Detail */
.detail-page {
    padding-bottom: 64px;
}

.detail-hero {
    background:
        linear-gradient(110deg, #11324f 0%, #0b5f95 54%, #2f7da9 100%);
    color: #fff;
    padding: 14px 0 32px;
}

.detail-hero .breadcrumb {
    color: rgba(255, 255, 255, 0.86);
    padding: 10px 0 18px;
}

.detail-hero .breadcrumb a:hover {
    color: #fff;
}

.detail-hero__eyebrow {
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 13px;
    opacity: 0.9;
}

.detail-hero h1 {
    margin: 8px 0 12px;
    max-width: 940px;
    font-size: clamp(28px, 4vw, 44px);
    line-height: 1.2;
}

.detail-hero__meta {
    margin: 0;
    color: rgba(255, 255, 255, 0.9);
    font-size: 15px;
}

.detail-layout {
    margin-top: 28px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 28px;
    align-items: start;
}

.detail-main {
    background: var(--surface);
    border: 1px solid #dce4ee;
    border-radius: var(--radius);
    overflow: hidden;
}

.detail-cover {
    aspect-ratio: 16 / 7;
    background:
        linear-gradient(130deg, rgba(0, 0, 0, 0.12), rgba(0, 0, 0, 0.44)),
        linear-gradient(140deg, #69a8c3, #1e4e70 58%, #162b3f);
}

.detail-section {
    padding: 24px 28px;
    border-bottom: 1px solid #e5ecf3;
}

.detail-section:last-child {
    border-bottom: 0;
}

.detail-section h2 {
    margin: 0 0 12px;
    font-size: 27px;
    line-height: 1.25;
}

.detail-section p {
    margin: 0;
    color: #4e5d71;
    font-size: 16px;
}

.detail-section ul {
    margin: 0;
    padding-left: 18px;
    color: #4e5d71;
}

.detail-section li + li {
    margin-top: 8px;
}

.detail-callout {
    margin-top: 14px;
    border-left: 4px solid var(--accent);
    background: var(--surface-muted);
    border-radius: 8px;
    padding: 14px 16px;
}

.detail-callout strong {
    display: block;
    margin-bottom: 4px;
    color: #24394e;
}

.detail-callout p {
    margin: 0;
}

.detail-metrics {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-bottom: 14px;
}

.metric {
    background: #f4f8fc;
    border: 1px solid #dbe7f2;
    border-radius: 10px;
    padding: 12px;
}

.metric__num {
    margin: 0;
    font-weight: 700;
    color: var(--brand);
    font-size: 28px;
    line-height: 1.1;
}

.metric__label {
    margin: 6px 0 0;
    font-size: 14px;
    color: #5c6c81;
}

.detail-side {
    display: grid;
    gap: 14px;
    position: sticky;
    top: 92px;
}

.side-card {
    background: var(--surface);
    border: 1px solid #dce4ee;
    border-radius: 12px;
    padding: 16px;
}

.side-card h3 {
    margin: 0 0 10px;
    font-size: 18px;
}

.side-card a {
    display: block;
    color: #37506a;
    font-size: 15px;
    padding: 7px 0;
}

.side-card a:hover {
    color: var(--brand);
}

.side-card p {
    margin: 0 0 10px;
    color: #5c6c81;
    font-size: 14px;
}

.btn--solid {
    background: var(--brand);
    color: #fff;
}

.btn--solid:hover {
    background: var(--brand-dark);
}

.side-card--cta {
    background: #f7fbff;
}

.side-card--cta .btn {
    width: 100%;
}

.side-link {
    font-weight: 600;
}

@media (max-width: 1024px) {
    .detail-layout {
        grid-template-columns: 1fr;
    }

    .detail-side {
        position: static;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 760px) {
    .detail-section {
        padding: 20px 18px;
    }

    .detail-section h2 {
        font-size: 23px;
    }

    .detail-metrics {
        grid-template-columns: 1fr;
    }

    .detail-side {
        grid-template-columns: 1fr;
    }
}

/* Amazon-like case detail (v2) */
.csd2-page {
    background: #ffffff;
    color: #273344;
}

.csd2-page .container1 {
    width: min(1140px, calc(100% - 56px));
}

.csd2-hero {
    min-height: 320px;
    color: #fff;
    background:
        linear-gradient(100deg, rgba(0, 0, 0, 0.72), rgba(0, 0, 0, 0.34) 58%, rgba(0, 0, 0, 0.28)),
        repeating-linear-gradient(
            90deg,
            #5a402d 0,
            #5a402d 42px,
            #4e3727 42px,
            #4e3727 48px,
            #6a4b34 48px,
            #6a4b34 82px
        );
    display: flex;
    align-items: end;
}

.csd2-hero__inner {
    padding: 34px 0 38px;
}

.csd2-logo {
    margin: 0 0 16px;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.csd2-logo span {
    color: #f9d64b;
}

.csd2-hero h1 {
    margin: 0;
    max-width: 520px;
    font-size: clamp(28px, 3.8vw, 42px);
    line-height: 1.15;
}

.csd2-btn {
    display: inline-flex;
    margin-top: 20px;
    padding: 10px 16px;
    font-size: 13px;
    font-weight: 700;
    background: #f2d437;
    color: #222;
    border-radius: 2px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.csd2-btn:hover {
    background: #e4c521;
}

.csd2-intro {
    background: #eceef2;
}

.csd2-intro__grid {
    display: grid;
    grid-template-columns: 320px 1fr;
}

.csd2-intro__nav {
    background: #1c2131;
    color: #dbe0ec;
    padding: 26px 26px 28px;
}

.csd2-intro__nav h2 {
    margin: 0 0 12px;
    font-size: 13px;
    color: #f0ca3d;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.csd2-intro__nav a {
    display: block;
    padding: 5px 0;
    font-size: 14px;
    color: #e6ebf5;
}

.csd2-intro__nav a:hover {
    color: #f0ca3d;
}

.csd2-intro__content {
    padding: 30px 34px;
}

.csd2-intro__content article + article {
    margin-top: 18px;
}

.csd2-intro__content h3 {
    margin: 0 0 8px;
    font-size: 20px;
    color: #2a3547;
}

.csd2-intro__content p {
    margin: 0;
    color:#2c2e30;
    font-size: 15px;
}

.csd2-intro__content p + p {
    margin-top: 9px;
}

.csd2-content {
    background: #dce3ed;
    padding: 42px 0 44px;
}

.csd2-content__grid {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 36px;
    align-items: start;
}

.csd2-article section + section {
    margin-top: 30px;
}

.csd2-article h2 {
    margin: 0 0 12px;
    font-size: 36px;
    line-height: 1.12;
    color: #2a3547;
}

.csd2-article p {
    margin: 0;
    font-size: 15px;
    color: #2c2e30;
}

.csd2-article p + p {
    margin-top: 10px;
}

.csd2-article ul {
    margin: 12px 0 0;
    padding-left: 18px;
}

.csd2-article li {
    color: #5a6678;
    font-size: 15px;
    margin-bottom: 6px;
}

.csd2-rail {
    display: grid;
    gap: 22px;
}
img{max-width:100%;}
.csd2-img {
    border: 1px solid #ccd7e6;
}

.csd2-img--brochure {
    height: 240px;
    background:
        linear-gradient(122deg, #ccb194 0 18%, #f3f2f0 18% 100%);
    position: relative;
}

.csd2-img--brochure::after {
    content: "KILBAC";
    position: absolute;
    right: 22px;
    top: 24px;
    color: #7a7a7a;
    font-size: 20px;
    letter-spacing: 0.1em;
    font-weight: 700;
}

.csd2-img--plant {
    height: 380px;
    background:
        linear-gradient(180deg, rgba(7, 27, 40, 0.45), rgba(7, 27, 40, 0.32)),
        linear-gradient(140deg, #01cfc5, #0e87b4 60%, #015a94);
}

.csd2-highlights {
    margin: 0;
    padding-left: 18px;
}

.csd2-highlights li {
    margin-bottom: 8px;
    color: #516072;
    font-size: 14px;
}

.csd2-key {
    background: #d9ead6;
    border: 1px solid #bbd5b6;
    padding: 14px 14px 15px;
}

.csd2-key h3 {
    margin: 0 0 6px;
    font-size: 24px;
    line-height: 1.1;
    color: #35603d;
}

.csd2-key p {
    margin: 0;
    font-size: 14px;
    color: #4a5e4c;
}

.csd2-cta {
    background:
        linear-gradient(104deg, rgba(6, 20, 40, 0.88), rgba(5, 30, 56, 0.72)),
        linear-gradient(145deg, #00d2c5, #0e79a8 62%, #093b74);
    color: #fff;
}

.csd2-cta__inner {
    padding: 36px 0;
}

.csd2-cta h2 {
    margin: 0;
    font-size: 34px;
    line-height: 1.12;
}

.csd2-cta p {
    margin: 8px 0 0;
    color: rgba(255, 255, 255, 0.9);
}

.csd2-btn--dark {
    margin-top: 16px;
    background: #1e4ad7;
    color: #fff;
}

.csd2-btn--dark:hover {
    background: #173db8;
}

.csd2-footer {
    background: #ffffff;
    border-top: 1px solid #e6ebf2;
}

.csd2-footer__grid {
    padding: 28px 0 30px;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 22px;
}

.csd2-footer h4 {
    margin: 0 0 9px;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #1d2b3d;
}

.csd2-footer a {
    display: block;
    color: #69778b;
    font-size: 14px;
    padding: 4px 0;
}

.csd2-footer a:hover {
    color: #2a3b52;
}

@media (max-width: 980px) {
    .csd2-page .container1 {
        width: min(1140px, calc(100% - 34px));
    }

    .csd2-intro__grid,
    .csd2-content__grid {
        grid-template-columns: 1fr;
    }

    .csd2-intro__nav {
        padding: 20px 20px 22px;
    }

    .csd2-intro__content {
        padding: 22px 20px;
    }

    .csd2-article h2 {
        font-size: 30px;
    }

    .csd2-rail {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .csd2-img--plant {
        height: 240px;
    }

    .csd2-key {
        grid-column: 1 / -1;
    }

    .csd2-footer__grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .csd2-hero {
        min-height: 260px;
    }

    .csd2-hero h1 {
        max-width: none;
        font-size: 29px;
    }

    .csd2-content {
        padding: 30px 0 34px;
    }

    .csd2-article h2 {
        font-size: 26px;
    }

    .csd2-rail {
        grid-template-columns: 1fr;
    }

    .csd2-footer__grid {
        grid-template-columns: 1fr;
    }
}