:root {
    --ink: #182334;
    --muted: #596678;
    --soft: #f5f8fb;
    --soft-2: #edf3f6;
    --paper: #ffffff;
    --line: #d9e2ea;
    --red: #d5404c;
    --red-dark: #a92f3b;
    --teal: #0f8b8d;
    --green: #2f7d59;
    --amber: #b8791f;
    --shadow: 0 18px 38px rgba(19, 33, 50, 0.12);
    --container: 1160px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--ink);
    background: var(--soft);
    font-family: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", Arial, sans-serif;
    line-height: 1.65;
}

body.menu-open {
    overflow: hidden;
}

img {
    max-width: 100%;
    height: auto;
}

a {
    color: inherit;
}

button,
input,
textarea {
    font: inherit;
}

.svg-sprite {
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
}

.container {
    width: min(var(--container), calc(100% - 40px));
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.92);
    border-bottom: 1px solid rgba(217, 226, 234, 0.92);
    backdrop-filter: blur(14px);
}

.header-inner {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    font-weight: 800;
    color: var(--ink);
}

.brand-mark {
    width: 58px;
    height: 42px;
    display: grid;
    place-items: center;
    color: var(--red);
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 8px;
    overflow: hidden;
    padding: 4px;
}

.button svg,
.icon-button svg,
.card-icon svg,
.path-card a svg,
.security-list svg,
.package-card li svg,
.chat-float svg,
.mobile-action-bar svg {
    width: 1.1em;
    height: 1.1em;
    flex: 0 0 auto;
}

.brand-mark img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.brand-text {
    display: grid;
    line-height: 1.1;
    font-size: 1.02rem;
}

.brand-text span {
    font-size: 0.78rem;
    color: var(--muted);
    font-weight: 600;
    margin-top: 3px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 22px;
    color: #344154;
    font-size: 0.95rem;
    font-weight: 650;
}

.nav-links a {
    text-decoration: none;
    padding: 8px 0;
    border-bottom: 2px solid transparent;
}

.nav-links a:hover,
.nav-links a:focus-visible {
    color: var(--red-dark);
    border-bottom-color: var(--red);
}

.icon-button {
    width: 42px;
    height: 42px;
    display: none;
    place-items: center;
    color: var(--ink);
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 6px;
}

.hero {
    min-height: 78svh;
    display: flex;
    align-items: center;
    color: #fff;
    background:
        linear-gradient(90deg, rgba(12, 19, 30, 0.97) 0%, rgba(12, 19, 30, 0.9) 46%, rgba(12, 19, 30, 0.62) 100%),
        url("../images/research-results.jpg") center / cover no-repeat;
}

.hero-content {
    padding: 92px 0 78px;
}

.hero-kicker,
.eyebrow {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    padding: 4px 10px;
    color: var(--red);
    background: rgba(213, 64, 76, 0.1);
    border: 1px solid rgba(213, 64, 76, 0.28);
    border-radius: 6px;
    font-size: 0.88rem;
    font-weight: 750;
}

.hero-kicker {
    color: #ffdce0;
    background: rgba(213, 64, 76, 0.24);
    border-color: rgba(255, 255, 255, 0.26);
}

.hero h1 {
    width: min(780px, 100%);
    margin: 22px 0 20px;
    font-size: 3.45rem;
    line-height: 1.12;
    font-weight: 850;
}

.hero-lead {
    width: min(720px, 100%);
    margin: 0;
    color: rgba(255, 255, 255, 0.86);
    font-size: 1.15rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 34px;
}

.button {
    min-height: 46px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    padding: 11px 18px;
    border: 1px solid transparent;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 760;
    cursor: pointer;
    transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.button:hover,
.button:focus-visible {
    transform: translateY(-1px);
}

.button-primary {
    color: #fff;
    background: var(--red);
    border-color: var(--red);
}

.button-primary:hover,
.button-primary:focus-visible {
    background: var(--red-dark);
    border-color: var(--red-dark);
}

.button-secondary {
    color: #fff;
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.42);
}

.button-ghost {
    color: var(--ink);
    background: #fff;
    border-color: var(--line);
}

.hero-metrics {
    width: min(900px, 100%);
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    margin: 42px 0 0;
}

.hero-metrics div {
    min-height: 88px;
    padding: 14px 16px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
}

.hero-metrics dt {
    font-size: 1.25rem;
    font-weight: 850;
}

.hero-metrics dd {
    margin: 4px 0 0;
    color: rgba(255, 255, 255, 0.76);
    font-size: 0.92rem;
}

.trust-strip {
    background: var(--paper);
    border-bottom: 1px solid var(--line);
}

.trust-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    background: var(--line);
}

.trust-grid div {
    min-height: 104px;
    padding: 24px 28px;
    background: #fff;
}

.trust-grid strong {
    display: block;
    color: var(--ink);
    font-size: 1.08rem;
}

.trust-grid span {
    display: block;
    margin-top: 6px;
    color: var(--muted);
    font-size: 0.95rem;
}

.section {
    padding: 86px 0;
    background: var(--paper);
}

.section-light {
    background: var(--soft);
}

.section-muted {
    background: var(--soft-2);
}

.section-heading {
    width: min(760px, 100%);
    margin-bottom: 34px;
}

.section-heading.compact {
    margin-bottom: 22px;
}

.section-heading h2,
.security-layout h2,
.contact-copy h2 {
    margin: 16px 0 12px;
    font-size: 2.25rem;
    line-height: 1.22;
}

.section-heading p,
.security-layout p,
.contact-copy p {
    margin: 0;
    color: var(--muted);
    font-size: 1.04rem;
}

.path-grid,
.case-grid,
.package-grid,
.deliverable-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.path-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.path-card,
.case-card,
.package-card,
.deliverable-grid article {
    min-height: 100%;
    padding: 24px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: 0 10px 24px rgba(19, 33, 50, 0.05);
}

.path-card:hover,
.case-card:hover,
.package-card:hover {
    border-color: rgba(213, 64, 76, 0.46);
    box-shadow: var(--shadow);
}

.card-icon {
    width: 46px;
    height: 46px;
    display: grid;
    place-items: center;
    border-radius: 8px;
    margin-bottom: 18px;
}

.card-icon.red {
    color: var(--red);
    background: rgba(213, 64, 76, 0.1);
}

.card-icon.teal {
    color: var(--teal);
    background: rgba(15, 139, 141, 0.11);
}

.card-icon.green {
    color: var(--green);
    background: rgba(47, 125, 89, 0.11);
}

.card-icon.amber {
    color: var(--amber);
    background: rgba(184, 121, 31, 0.13);
}

.path-card h3,
.case-card h3,
.package-card h3,
.deliverable-grid h3 {
    margin: 0 0 10px;
    font-size: 1.16rem;
    line-height: 1.35;
}

.path-card p,
.case-card dd,
.package-card p,
.deliverable-grid p {
    margin: 0;
    color: var(--muted);
    font-size: 0.96rem;
}

.path-card a {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    margin-top: 18px;
    color: var(--red-dark);
    font-weight: 750;
    text-decoration: none;
}

.delivery-layout {
    display: block;
}

.delivery-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 18px;
}

.delivery-tags span {
    display: inline-flex;
    align-items: center;
    min-height: 28px;
    padding: 4px 10px;
    color: var(--red-dark);
    background: rgba(213, 64, 76, 0.09);
    border: 1px solid rgba(213, 64, 76, 0.22);
    border-radius: 6px;
    font-size: 0.86rem;
    font-weight: 760;
}

.deliverables-content {
    display: grid;
    grid-template-columns: 330px minmax(0, 1fr);
    gap: 24px;
    margin-top: 30px;
    align-items: start;
}

.deliverable-grid {
    grid-template-columns: 1fr;
    gap: 14px;
    margin-top: 0;
}

.deliverable-grid article {
    position: relative;
    min-height: 150px;
    padding: 50px 22px 22px;
    overflow: hidden;
    border-left: 4px solid rgba(213, 64, 76, 0.72);
}

.deliverable-number {
    position: absolute;
    top: 18px;
    left: 22px;
    color: rgba(213, 64, 76, 0.18);
    font-size: 2.1rem;
    line-height: 1;
    font-weight: 900;
}

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

.chart-card {
    display: grid;
    grid-template-rows: 150px auto;
    min-height: 266px;
    padding: 12px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: 0 10px 24px rgba(19, 33, 50, 0.06);
}

.chart-card img {
    display: block;
    width: 100%;
    height: 150px;
    object-fit: contain;
    background: #fff;
    border: 1px solid #edf2f6;
    border-radius: 6px;
}

.chart-card div {
    padding: 12px 2px 2px;
}

.chart-card h3 {
    margin: 0 0 5px;
    font-size: 1rem;
    line-height: 1.3;
}

.chart-card p {
    margin: 0;
    color: var(--muted);
    font-size: 0.9rem;
    line-height: 1.55;
}

.workflow {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.workflow li {
    position: relative;
    min-height: 234px;
    padding: 28px 24px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 8px;
}

.workflow span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 32px;
    color: #fff;
    background: var(--ink);
    border-radius: 6px;
    font-weight: 850;
}

.workflow h3 {
    margin: 22px 0 10px;
}

.workflow p {
    margin: 0;
    color: var(--muted);
}

.case-card {
    padding-top: 20px;
}

.case-tag,
.featured-label {
    display: inline-flex;
    align-items: center;
    min-height: 26px;
    padding: 3px 9px;
    color: var(--red-dark);
    background: rgba(213, 64, 76, 0.1);
    border: 1px solid rgba(213, 64, 76, 0.22);
    border-radius: 6px;
    font-size: 0.82rem;
    font-weight: 760;
}

.case-card dl {
    display: grid;
    gap: 14px;
    margin: 20px 0 0;
}

.case-card div:not(.case-tag) {
    display: grid;
    gap: 4px;
}

.case-card dt {
    color: var(--ink);
    font-weight: 800;
}

.security-section {
    color: #fff;
    background: #182334;
}

.security-layout {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 50px;
    align-items: start;
}

.security-layout .eyebrow {
    color: #ffdce0;
    background: rgba(213, 64, 76, 0.22);
    border-color: rgba(255, 255, 255, 0.2);
}

.security-layout p {
    color: rgba(255, 255, 255, 0.72);
}

.security-list {
    display: grid;
    gap: 14px;
}

.security-list article {
    display: grid;
    grid-template-columns: 38px 1fr;
    gap: 16px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 8px;
}

.security-list svg {
    width: 38px;
    height: 38px;
    color: #fff;
    padding: 8px;
    background: var(--green);
    border-radius: 8px;
}

.security-list h3 {
    margin: 0 0 6px;
}

.security-list p {
    margin: 0;
}

.package-grid {
    align-items: stretch;
}

.package-card {
    position: relative;
}

.package-card.featured {
    border-color: rgba(213, 64, 76, 0.64);
    box-shadow: var(--shadow);
}

.featured-label {
    position: absolute;
    top: 18px;
    right: 18px;
}

.price {
    color: var(--red-dark);
    font-size: 1.8rem;
    font-weight: 850;
}

.package-card ul {
    display: grid;
    gap: 10px;
    margin: 22px 0 0;
    padding: 0;
    list-style: none;
}

.package-card li {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #344154;
}

.package-card li svg {
    color: var(--green);
}

.pricing-detail {
    margin-top: 22px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 8px;
    overflow: hidden;
}

.pricing-detail-title {
    margin: 0;
    padding: 18px 22px;
    font-size: 1.18rem;
    border-bottom: 1px solid var(--line);
}

.pricing-detail summary {
    min-height: 56px;
    display: flex;
    align-items: center;
    padding: 0 22px;
    cursor: pointer;
    font-weight: 820;
}

.table-wrap {
    overflow-x: auto;
    border-top: 1px solid var(--line);
}

table {
    width: 100%;
    min-width: 980px;
    border-collapse: collapse;
}

th,
td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--line);
}

th {
    color: #fff;
    background: var(--ink);
}

tbody + thead th {
    border-top: 14px solid #fff;
}

td:last-child {
    color: var(--red-dark);
    font-weight: 800;
}

.contact-section {
    background: #fff;
}

.contact-layout {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 46px;
    align-items: center;
}

.contact-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 28px;
}

.contact-lines {
    display: grid;
    gap: 8px;
    margin-top: 24px;
    color: var(--muted);
}

.contact-lines p {
    margin: 0;
}

.qr-panel {
    padding: 22px;
    text-align: center;
    background: var(--soft);
    border: 1px solid var(--line);
    border-radius: 8px;
}

.qr-panel img,
.floating-qr img {
    display: block;
    width: min(100%, 260px);
    height: auto;
    margin: 0 auto;
    background: #fff;
    border: 8px solid #fff;
    border-radius: 8px;
}

.qr-panel h3 {
    margin: 18px 0 6px;
}

.qr-panel p {
    margin: 0;
    color: var(--muted);
    font-size: 0.95rem;
}

.site-footer {
    padding: 28px 0;
    color: rgba(255, 255, 255, 0.76);
    background: #111a27;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    flex-wrap: wrap;
}

.footer-inner p {
    margin: 0;
}

.chat-float {
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 60;
    min-height: 48px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 11px 16px;
    color: #fff;
    background: var(--red);
    border: 0;
    border-radius: 6px;
    box-shadow: var(--shadow);
    cursor: pointer;
    font-weight: 800;
}

.floating-qr {
    position: fixed;
    right: 24px;
    bottom: 86px;
    z-index: 60;
    width: 286px;
    padding: 16px;
    text-align: center;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.floating-qr strong,
.floating-qr span {
    display: block;
}

.floating-qr strong {
    margin-top: 12px;
}

.floating-qr span {
    color: var(--muted);
    font-size: 0.92rem;
}

.mobile-action-bar {
    display: none;
}

.copy-toast {
    position: fixed;
    left: 50%;
    bottom: 24px;
    z-index: 80;
    transform: translateX(-50%);
    padding: 10px 14px;
    color: #fff;
    background: #182334;
    border-radius: 6px;
    box-shadow: var(--shadow);
}

:focus-visible {
    outline: 3px solid rgba(15, 139, 141, 0.45);
    outline-offset: 3px;
}

@media (max-width: 1040px) {
    .path-grid,
    .workflow {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .security-layout,
    .contact-layout {
        grid-template-columns: 1fr;
    }

    .deliverables-content {
        grid-template-columns: 1fr;
    }

    .deliverable-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

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

@media (max-width: 820px) {
    .container {
        width: min(100% - 28px, var(--container));
    }

    .menu-button {
        display: grid;
    }

    .nav-links {
        position: fixed;
        inset: 72px 0 auto 0;
        display: none;
        padding: 18px 20px 26px;
        background: #fff;
        border-bottom: 1px solid var(--line);
        box-shadow: var(--shadow);
    }

    .nav-links.is-open {
        display: grid;
        gap: 8px;
    }

    .nav-links a {
        min-height: 42px;
        display: flex;
        align-items: center;
        border-bottom: 1px solid var(--line);
    }

    .hero {
        min-height: 76svh;
        background-position: 58% center;
    }

    .hero h1 {
        font-size: 2.35rem;
    }

    .hero-lead {
        font-size: 1.02rem;
    }

    .hero-metrics,
    .trust-grid,
    .case-grid,
    .package-grid,
    .deliverable-grid {
        grid-template-columns: 1fr;
    }

    .chart-gallery {
        grid-template-columns: 1fr;
    }

    .chart-card {
        grid-template-columns: 160px minmax(0, 1fr);
        grid-template-rows: auto;
        min-height: 0;
        align-items: center;
    }

    .chart-card img {
        height: 112px;
    }

    .section {
        padding: 64px 0;
    }

    .section-heading h2,
    .security-layout h2,
    .contact-copy h2 {
        font-size: 1.85rem;
    }

    .chat-float,
    .floating-qr {
        display: none;
    }

    .mobile-action-bar {
        position: fixed;
        left: 12px;
        right: 12px;
        bottom: 12px;
        z-index: 70;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 8px;
        padding: 8px;
        background: rgba(255, 255, 255, 0.94);
        border: 1px solid var(--line);
        border-radius: 8px;
        box-shadow: var(--shadow);
        backdrop-filter: blur(12px);
    }

    .mobile-action-bar a {
        min-height: 42px;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 7px;
        color: #fff;
        background: var(--red);
        border-radius: 6px;
        text-decoration: none;
        font-weight: 800;
    }

    .mobile-action-bar a:last-child {
        color: var(--ink);
        background: var(--soft-2);
    }

    .site-footer {
        padding-bottom: 86px;
    }
}

@media (max-width: 620px) {
    .brand-text {
        font-size: 0.95rem;
    }

    .hero-content {
        padding: 68px 0 56px;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-actions,
    .contact-actions {
        display: grid;
    }

    .hero-metrics,
    .path-grid,
    .workflow,
    .deliverable-grid {
        grid-template-columns: 1fr;
    }

    .workflow li {
        min-height: auto;
    }

    .path-card,
    .case-card,
    .package-card {
        padding: 20px;
    }

    .deliverable-grid article {
        min-height: 0;
        padding: 48px 20px 20px;
    }

    .chart-card {
        grid-template-columns: 1fr;
    }

    .chart-card img {
        height: 148px;
    }

    .qr-panel img {
        width: min(100%, 240px);
    }
}